Commit | Line | Data |
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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-core.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
92c52c52 AC |
33 | * Standards documents from: |
34 | * http://www.t13.org (ATA standards, PCI DMA IDE spec) | |
35 | * http://www.t10.org (SCSI MMC - for ATAPI MMC) | |
36 | * http://www.sata-io.org (SATA) | |
37 | * http://www.compactflash.org (CF) | |
38 | * http://www.qic.org (QIC157 - Tape and DSC) | |
39 | * http://www.ce-ata.org (CE-ATA: not supported) | |
40 | * | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/kernel.h> |
44 | #include <linux/module.h> | |
45 | #include <linux/pci.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/list.h> | |
48 | #include <linux/mm.h> | |
49 | #include <linux/highmem.h> | |
50 | #include <linux/spinlock.h> | |
51 | #include <linux/blkdev.h> | |
52 | #include <linux/delay.h> | |
53 | #include <linux/timer.h> | |
54 | #include <linux/interrupt.h> | |
55 | #include <linux/completion.h> | |
56 | #include <linux/suspend.h> | |
57 | #include <linux/workqueue.h> | |
67846b30 | 58 | #include <linux/jiffies.h> |
378f058c | 59 | #include <linux/scatterlist.h> |
2dcb407e | 60 | #include <linux/io.h> |
1da177e4 | 61 | #include <scsi/scsi.h> |
193515d5 | 62 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
63 | #include <scsi/scsi_host.h> |
64 | #include <linux/libata.h> | |
1da177e4 LT |
65 | #include <asm/semaphore.h> |
66 | #include <asm/byteorder.h> | |
140b5e59 | 67 | #include <linux/cdrom.h> |
1da177e4 LT |
68 | |
69 | #include "libata.h" | |
70 | ||
fda0efc5 | 71 | |
d7bb4cc7 | 72 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
73 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
74 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
75 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 76 | |
3373efd8 TH |
77 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
78 | u16 heads, u16 sectors); | |
79 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
218f3d30 JG |
80 | static unsigned int ata_dev_set_feature(struct ata_device *dev, |
81 | u8 enable, u8 feature); | |
3373efd8 | 82 | static void ata_dev_xfermask(struct ata_device *dev); |
75683fe7 | 83 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
1da177e4 | 84 | |
f3187195 | 85 | unsigned int ata_print_id = 1; |
1da177e4 LT |
86 | static struct workqueue_struct *ata_wq; |
87 | ||
453b07ac TH |
88 | struct workqueue_struct *ata_aux_wq; |
89 | ||
33267325 TH |
90 | struct ata_force_param { |
91 | const char *name; | |
92 | unsigned int cbl; | |
93 | int spd_limit; | |
94 | unsigned long xfer_mask; | |
95 | unsigned int horkage_on; | |
96 | unsigned int horkage_off; | |
97 | }; | |
98 | ||
99 | struct ata_force_ent { | |
100 | int port; | |
101 | int device; | |
102 | struct ata_force_param param; | |
103 | }; | |
104 | ||
105 | static struct ata_force_ent *ata_force_tbl; | |
106 | static int ata_force_tbl_size; | |
107 | ||
108 | static char ata_force_param_buf[PAGE_SIZE] __initdata; | |
109 | module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0444); | |
110 | MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); | |
111 | ||
418dc1f5 | 112 | int atapi_enabled = 1; |
1623c81e JG |
113 | module_param(atapi_enabled, int, 0444); |
114 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
115 | ||
95de719a AL |
116 | int atapi_dmadir = 0; |
117 | module_param(atapi_dmadir, int, 0444); | |
118 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
119 | ||
baf4fdfa ML |
120 | int atapi_passthru16 = 1; |
121 | module_param(atapi_passthru16, int, 0444); | |
122 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); | |
123 | ||
c3c013a2 JG |
124 | int libata_fua = 0; |
125 | module_param_named(fua, libata_fua, int, 0444); | |
126 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
127 | ||
2dcb407e | 128 | static int ata_ignore_hpa; |
1e999736 AC |
129 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
130 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
131 | ||
b3a70601 AC |
132 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
133 | module_param_named(dma, libata_dma_mask, int, 0444); | |
134 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); | |
135 | ||
a8601e5f AM |
136 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
137 | module_param(ata_probe_timeout, int, 0444); | |
138 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
139 | ||
6ebe9d86 | 140 | int libata_noacpi = 0; |
d7d0dad6 | 141 | module_param_named(noacpi, libata_noacpi, int, 0444); |
6ebe9d86 | 142 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); |
11ef697b | 143 | |
ae8d4ee7 AC |
144 | int libata_allow_tpm = 0; |
145 | module_param_named(allow_tpm, libata_allow_tpm, int, 0444); | |
146 | MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands"); | |
147 | ||
1da177e4 LT |
148 | MODULE_AUTHOR("Jeff Garzik"); |
149 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
150 | MODULE_LICENSE("GPL"); | |
151 | MODULE_VERSION(DRV_VERSION); | |
152 | ||
0baab86b | 153 | |
33267325 TH |
154 | /** |
155 | * ata_force_cbl - force cable type according to libata.force | |
156 | * @link: ATA link of interest | |
157 | * | |
158 | * Force cable type according to libata.force and whine about it. | |
159 | * The last entry which has matching port number is used, so it | |
160 | * can be specified as part of device force parameters. For | |
161 | * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the | |
162 | * same effect. | |
163 | * | |
164 | * LOCKING: | |
165 | * EH context. | |
166 | */ | |
167 | void ata_force_cbl(struct ata_port *ap) | |
168 | { | |
169 | int i; | |
170 | ||
171 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
172 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
173 | ||
174 | if (fe->port != -1 && fe->port != ap->print_id) | |
175 | continue; | |
176 | ||
177 | if (fe->param.cbl == ATA_CBL_NONE) | |
178 | continue; | |
179 | ||
180 | ap->cbl = fe->param.cbl; | |
181 | ata_port_printk(ap, KERN_NOTICE, | |
182 | "FORCE: cable set to %s\n", fe->param.name); | |
183 | return; | |
184 | } | |
185 | } | |
186 | ||
187 | /** | |
188 | * ata_force_spd_limit - force SATA spd limit according to libata.force | |
189 | * @link: ATA link of interest | |
190 | * | |
191 | * Force SATA spd limit according to libata.force and whine about | |
192 | * it. When only the port part is specified (e.g. 1:), the limit | |
193 | * applies to all links connected to both the host link and all | |
194 | * fan-out ports connected via PMP. If the device part is | |
195 | * specified as 0 (e.g. 1.00:), it specifies the first fan-out | |
196 | * link not the host link. Device number 15 always points to the | |
197 | * host link whether PMP is attached or not. | |
198 | * | |
199 | * LOCKING: | |
200 | * EH context. | |
201 | */ | |
202 | static void ata_force_spd_limit(struct ata_link *link) | |
203 | { | |
204 | int linkno, i; | |
205 | ||
206 | if (ata_is_host_link(link)) | |
207 | linkno = 15; | |
208 | else | |
209 | linkno = link->pmp; | |
210 | ||
211 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
212 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
213 | ||
214 | if (fe->port != -1 && fe->port != link->ap->print_id) | |
215 | continue; | |
216 | ||
217 | if (fe->device != -1 && fe->device != linkno) | |
218 | continue; | |
219 | ||
220 | if (!fe->param.spd_limit) | |
221 | continue; | |
222 | ||
223 | link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; | |
224 | ata_link_printk(link, KERN_NOTICE, | |
225 | "FORCE: PHY spd limit set to %s\n", fe->param.name); | |
226 | return; | |
227 | } | |
228 | } | |
229 | ||
230 | /** | |
231 | * ata_force_xfermask - force xfermask according to libata.force | |
232 | * @dev: ATA device of interest | |
233 | * | |
234 | * Force xfer_mask according to libata.force and whine about it. | |
235 | * For consistency with link selection, device number 15 selects | |
236 | * the first device connected to the host link. | |
237 | * | |
238 | * LOCKING: | |
239 | * EH context. | |
240 | */ | |
241 | static void ata_force_xfermask(struct ata_device *dev) | |
242 | { | |
243 | int devno = dev->link->pmp + dev->devno; | |
244 | int alt_devno = devno; | |
245 | int i; | |
246 | ||
247 | /* allow n.15 for the first device attached to host port */ | |
248 | if (ata_is_host_link(dev->link) && devno == 0) | |
249 | alt_devno = 15; | |
250 | ||
251 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
252 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
253 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
254 | ||
255 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
256 | continue; | |
257 | ||
258 | if (fe->device != -1 && fe->device != devno && | |
259 | fe->device != alt_devno) | |
260 | continue; | |
261 | ||
262 | if (!fe->param.xfer_mask) | |
263 | continue; | |
264 | ||
265 | ata_unpack_xfermask(fe->param.xfer_mask, | |
266 | &pio_mask, &mwdma_mask, &udma_mask); | |
267 | if (udma_mask) | |
268 | dev->udma_mask = udma_mask; | |
269 | else if (mwdma_mask) { | |
270 | dev->udma_mask = 0; | |
271 | dev->mwdma_mask = mwdma_mask; | |
272 | } else { | |
273 | dev->udma_mask = 0; | |
274 | dev->mwdma_mask = 0; | |
275 | dev->pio_mask = pio_mask; | |
276 | } | |
277 | ||
278 | ata_dev_printk(dev, KERN_NOTICE, | |
279 | "FORCE: xfer_mask set to %s\n", fe->param.name); | |
280 | return; | |
281 | } | |
282 | } | |
283 | ||
284 | /** | |
285 | * ata_force_horkage - force horkage according to libata.force | |
286 | * @dev: ATA device of interest | |
287 | * | |
288 | * Force horkage according to libata.force and whine about it. | |
289 | * For consistency with link selection, device number 15 selects | |
290 | * the first device connected to the host link. | |
291 | * | |
292 | * LOCKING: | |
293 | * EH context. | |
294 | */ | |
295 | static void ata_force_horkage(struct ata_device *dev) | |
296 | { | |
297 | int devno = dev->link->pmp + dev->devno; | |
298 | int alt_devno = devno; | |
299 | int i; | |
300 | ||
301 | /* allow n.15 for the first device attached to host port */ | |
302 | if (ata_is_host_link(dev->link) && devno == 0) | |
303 | alt_devno = 15; | |
304 | ||
305 | for (i = 0; i < ata_force_tbl_size; i++) { | |
306 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
307 | ||
308 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
309 | continue; | |
310 | ||
311 | if (fe->device != -1 && fe->device != devno && | |
312 | fe->device != alt_devno) | |
313 | continue; | |
314 | ||
315 | if (!(~dev->horkage & fe->param.horkage_on) && | |
316 | !(dev->horkage & fe->param.horkage_off)) | |
317 | continue; | |
318 | ||
319 | dev->horkage |= fe->param.horkage_on; | |
320 | dev->horkage &= ~fe->param.horkage_off; | |
321 | ||
322 | ata_dev_printk(dev, KERN_NOTICE, | |
323 | "FORCE: horkage modified (%s)\n", fe->param.name); | |
324 | } | |
325 | } | |
326 | ||
1da177e4 LT |
327 | /** |
328 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
329 | * @tf: Taskfile to convert | |
1da177e4 | 330 | * @pmp: Port multiplier port |
9977126c TH |
331 | * @is_cmd: This FIS is for command |
332 | * @fis: Buffer into which data will output | |
1da177e4 LT |
333 | * |
334 | * Converts a standard ATA taskfile to a Serial ATA | |
335 | * FIS structure (Register - Host to Device). | |
336 | * | |
337 | * LOCKING: | |
338 | * Inherited from caller. | |
339 | */ | |
9977126c | 340 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 341 | { |
9977126c TH |
342 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
343 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
344 | if (is_cmd) | |
345 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
346 | ||
1da177e4 LT |
347 | fis[2] = tf->command; |
348 | fis[3] = tf->feature; | |
349 | ||
350 | fis[4] = tf->lbal; | |
351 | fis[5] = tf->lbam; | |
352 | fis[6] = tf->lbah; | |
353 | fis[7] = tf->device; | |
354 | ||
355 | fis[8] = tf->hob_lbal; | |
356 | fis[9] = tf->hob_lbam; | |
357 | fis[10] = tf->hob_lbah; | |
358 | fis[11] = tf->hob_feature; | |
359 | ||
360 | fis[12] = tf->nsect; | |
361 | fis[13] = tf->hob_nsect; | |
362 | fis[14] = 0; | |
363 | fis[15] = tf->ctl; | |
364 | ||
365 | fis[16] = 0; | |
366 | fis[17] = 0; | |
367 | fis[18] = 0; | |
368 | fis[19] = 0; | |
369 | } | |
370 | ||
371 | /** | |
372 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
373 | * @fis: Buffer from which data will be input | |
374 | * @tf: Taskfile to output | |
375 | * | |
e12a1be6 | 376 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
377 | * |
378 | * LOCKING: | |
379 | * Inherited from caller. | |
380 | */ | |
381 | ||
057ace5e | 382 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
383 | { |
384 | tf->command = fis[2]; /* status */ | |
385 | tf->feature = fis[3]; /* error */ | |
386 | ||
387 | tf->lbal = fis[4]; | |
388 | tf->lbam = fis[5]; | |
389 | tf->lbah = fis[6]; | |
390 | tf->device = fis[7]; | |
391 | ||
392 | tf->hob_lbal = fis[8]; | |
393 | tf->hob_lbam = fis[9]; | |
394 | tf->hob_lbah = fis[10]; | |
395 | ||
396 | tf->nsect = fis[12]; | |
397 | tf->hob_nsect = fis[13]; | |
398 | } | |
399 | ||
8cbd6df1 AL |
400 | static const u8 ata_rw_cmds[] = { |
401 | /* pio multi */ | |
402 | ATA_CMD_READ_MULTI, | |
403 | ATA_CMD_WRITE_MULTI, | |
404 | ATA_CMD_READ_MULTI_EXT, | |
405 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
406 | 0, |
407 | 0, | |
408 | 0, | |
409 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
410 | /* pio */ |
411 | ATA_CMD_PIO_READ, | |
412 | ATA_CMD_PIO_WRITE, | |
413 | ATA_CMD_PIO_READ_EXT, | |
414 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
415 | 0, |
416 | 0, | |
417 | 0, | |
418 | 0, | |
8cbd6df1 AL |
419 | /* dma */ |
420 | ATA_CMD_READ, | |
421 | ATA_CMD_WRITE, | |
422 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
423 | ATA_CMD_WRITE_EXT, |
424 | 0, | |
425 | 0, | |
426 | 0, | |
427 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 428 | }; |
1da177e4 LT |
429 | |
430 | /** | |
8cbd6df1 | 431 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
432 | * @tf: command to examine and configure |
433 | * @dev: device tf belongs to | |
1da177e4 | 434 | * |
2e9edbf8 | 435 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 436 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
437 | * |
438 | * LOCKING: | |
439 | * caller. | |
440 | */ | |
bd056d7e | 441 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 442 | { |
9a3dccc4 | 443 | u8 cmd; |
1da177e4 | 444 | |
9a3dccc4 | 445 | int index, fua, lba48, write; |
2e9edbf8 | 446 | |
9a3dccc4 | 447 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
448 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
449 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 450 | |
8cbd6df1 AL |
451 | if (dev->flags & ATA_DFLAG_PIO) { |
452 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 453 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 454 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
455 | /* Unable to use DMA due to host limitation */ |
456 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 457 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
458 | } else { |
459 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 460 | index = 16; |
8cbd6df1 | 461 | } |
1da177e4 | 462 | |
9a3dccc4 TH |
463 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
464 | if (cmd) { | |
465 | tf->command = cmd; | |
466 | return 0; | |
467 | } | |
468 | return -1; | |
1da177e4 LT |
469 | } |
470 | ||
35b649fe TH |
471 | /** |
472 | * ata_tf_read_block - Read block address from ATA taskfile | |
473 | * @tf: ATA taskfile of interest | |
474 | * @dev: ATA device @tf belongs to | |
475 | * | |
476 | * LOCKING: | |
477 | * None. | |
478 | * | |
479 | * Read block address from @tf. This function can handle all | |
480 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
481 | * flags select the address format to use. | |
482 | * | |
483 | * RETURNS: | |
484 | * Block address read from @tf. | |
485 | */ | |
486 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
487 | { | |
488 | u64 block = 0; | |
489 | ||
490 | if (tf->flags & ATA_TFLAG_LBA) { | |
491 | if (tf->flags & ATA_TFLAG_LBA48) { | |
492 | block |= (u64)tf->hob_lbah << 40; | |
493 | block |= (u64)tf->hob_lbam << 32; | |
494 | block |= tf->hob_lbal << 24; | |
495 | } else | |
496 | block |= (tf->device & 0xf) << 24; | |
497 | ||
498 | block |= tf->lbah << 16; | |
499 | block |= tf->lbam << 8; | |
500 | block |= tf->lbal; | |
501 | } else { | |
502 | u32 cyl, head, sect; | |
503 | ||
504 | cyl = tf->lbam | (tf->lbah << 8); | |
505 | head = tf->device & 0xf; | |
506 | sect = tf->lbal; | |
507 | ||
508 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
509 | } | |
510 | ||
511 | return block; | |
512 | } | |
513 | ||
bd056d7e TH |
514 | /** |
515 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
516 | * @tf: Target ATA taskfile | |
517 | * @dev: ATA device @tf belongs to | |
518 | * @block: Block address | |
519 | * @n_block: Number of blocks | |
520 | * @tf_flags: RW/FUA etc... | |
521 | * @tag: tag | |
522 | * | |
523 | * LOCKING: | |
524 | * None. | |
525 | * | |
526 | * Build ATA taskfile @tf for read/write request described by | |
527 | * @block, @n_block, @tf_flags and @tag on @dev. | |
528 | * | |
529 | * RETURNS: | |
530 | * | |
531 | * 0 on success, -ERANGE if the request is too large for @dev, | |
532 | * -EINVAL if the request is invalid. | |
533 | */ | |
534 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
535 | u64 block, u32 n_block, unsigned int tf_flags, | |
536 | unsigned int tag) | |
537 | { | |
538 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
539 | tf->flags |= tf_flags; | |
540 | ||
6d1245bf | 541 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
542 | /* yay, NCQ */ |
543 | if (!lba_48_ok(block, n_block)) | |
544 | return -ERANGE; | |
545 | ||
546 | tf->protocol = ATA_PROT_NCQ; | |
547 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
548 | ||
549 | if (tf->flags & ATA_TFLAG_WRITE) | |
550 | tf->command = ATA_CMD_FPDMA_WRITE; | |
551 | else | |
552 | tf->command = ATA_CMD_FPDMA_READ; | |
553 | ||
554 | tf->nsect = tag << 3; | |
555 | tf->hob_feature = (n_block >> 8) & 0xff; | |
556 | tf->feature = n_block & 0xff; | |
557 | ||
558 | tf->hob_lbah = (block >> 40) & 0xff; | |
559 | tf->hob_lbam = (block >> 32) & 0xff; | |
560 | tf->hob_lbal = (block >> 24) & 0xff; | |
561 | tf->lbah = (block >> 16) & 0xff; | |
562 | tf->lbam = (block >> 8) & 0xff; | |
563 | tf->lbal = block & 0xff; | |
564 | ||
565 | tf->device = 1 << 6; | |
566 | if (tf->flags & ATA_TFLAG_FUA) | |
567 | tf->device |= 1 << 7; | |
568 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
569 | tf->flags |= ATA_TFLAG_LBA; | |
570 | ||
571 | if (lba_28_ok(block, n_block)) { | |
572 | /* use LBA28 */ | |
573 | tf->device |= (block >> 24) & 0xf; | |
574 | } else if (lba_48_ok(block, n_block)) { | |
575 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
576 | return -ERANGE; | |
577 | ||
578 | /* use LBA48 */ | |
579 | tf->flags |= ATA_TFLAG_LBA48; | |
580 | ||
581 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
582 | ||
583 | tf->hob_lbah = (block >> 40) & 0xff; | |
584 | tf->hob_lbam = (block >> 32) & 0xff; | |
585 | tf->hob_lbal = (block >> 24) & 0xff; | |
586 | } else | |
587 | /* request too large even for LBA48 */ | |
588 | return -ERANGE; | |
589 | ||
590 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
591 | return -EINVAL; | |
592 | ||
593 | tf->nsect = n_block & 0xff; | |
594 | ||
595 | tf->lbah = (block >> 16) & 0xff; | |
596 | tf->lbam = (block >> 8) & 0xff; | |
597 | tf->lbal = block & 0xff; | |
598 | ||
599 | tf->device |= ATA_LBA; | |
600 | } else { | |
601 | /* CHS */ | |
602 | u32 sect, head, cyl, track; | |
603 | ||
604 | /* The request -may- be too large for CHS addressing. */ | |
605 | if (!lba_28_ok(block, n_block)) | |
606 | return -ERANGE; | |
607 | ||
608 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
609 | return -EINVAL; | |
610 | ||
611 | /* Convert LBA to CHS */ | |
612 | track = (u32)block / dev->sectors; | |
613 | cyl = track / dev->heads; | |
614 | head = track % dev->heads; | |
615 | sect = (u32)block % dev->sectors + 1; | |
616 | ||
617 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
618 | (u32)block, track, cyl, head, sect); | |
619 | ||
620 | /* Check whether the converted CHS can fit. | |
621 | Cylinder: 0-65535 | |
622 | Head: 0-15 | |
623 | Sector: 1-255*/ | |
624 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
625 | return -ERANGE; | |
626 | ||
627 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
628 | tf->lbal = sect; | |
629 | tf->lbam = cyl; | |
630 | tf->lbah = cyl >> 8; | |
631 | tf->device |= head; | |
632 | } | |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
cb95d562 TH |
637 | /** |
638 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
639 | * @pio_mask: pio_mask | |
640 | * @mwdma_mask: mwdma_mask | |
641 | * @udma_mask: udma_mask | |
642 | * | |
643 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
644 | * unsigned int xfer_mask. | |
645 | * | |
646 | * LOCKING: | |
647 | * None. | |
648 | * | |
649 | * RETURNS: | |
650 | * Packed xfer_mask. | |
651 | */ | |
7dc951ae TH |
652 | unsigned long ata_pack_xfermask(unsigned long pio_mask, |
653 | unsigned long mwdma_mask, | |
654 | unsigned long udma_mask) | |
cb95d562 TH |
655 | { |
656 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
657 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
658 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
659 | } | |
660 | ||
c0489e4e TH |
661 | /** |
662 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
663 | * @xfer_mask: xfer_mask to unpack | |
664 | * @pio_mask: resulting pio_mask | |
665 | * @mwdma_mask: resulting mwdma_mask | |
666 | * @udma_mask: resulting udma_mask | |
667 | * | |
668 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
669 | * Any NULL distination masks will be ignored. | |
670 | */ | |
7dc951ae TH |
671 | void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
672 | unsigned long *mwdma_mask, unsigned long *udma_mask) | |
c0489e4e TH |
673 | { |
674 | if (pio_mask) | |
675 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
676 | if (mwdma_mask) | |
677 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
678 | if (udma_mask) | |
679 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
680 | } | |
681 | ||
cb95d562 | 682 | static const struct ata_xfer_ent { |
be9a50c8 | 683 | int shift, bits; |
cb95d562 TH |
684 | u8 base; |
685 | } ata_xfer_tbl[] = { | |
70cd071e TH |
686 | { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
687 | { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, | |
688 | { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, | |
cb95d562 TH |
689 | { -1, }, |
690 | }; | |
691 | ||
692 | /** | |
693 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
694 | * @xfer_mask: xfer_mask of interest | |
695 | * | |
696 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
697 | * bit of @xfer_mask is considered. | |
698 | * | |
699 | * LOCKING: | |
700 | * None. | |
701 | * | |
702 | * RETURNS: | |
70cd071e | 703 | * Matching XFER_* value, 0xff if no match found. |
cb95d562 | 704 | */ |
7dc951ae | 705 | u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
cb95d562 TH |
706 | { |
707 | int highbit = fls(xfer_mask) - 1; | |
708 | const struct ata_xfer_ent *ent; | |
709 | ||
710 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
711 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
712 | return ent->base + highbit - ent->shift; | |
70cd071e | 713 | return 0xff; |
cb95d562 TH |
714 | } |
715 | ||
716 | /** | |
717 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
718 | * @xfer_mode: XFER_* of interest | |
719 | * | |
720 | * Return matching xfer_mask for @xfer_mode. | |
721 | * | |
722 | * LOCKING: | |
723 | * None. | |
724 | * | |
725 | * RETURNS: | |
726 | * Matching xfer_mask, 0 if no match found. | |
727 | */ | |
7dc951ae | 728 | unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
cb95d562 TH |
729 | { |
730 | const struct ata_xfer_ent *ent; | |
731 | ||
732 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
733 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
70cd071e TH |
734 | return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
735 | & ~((1 << ent->shift) - 1); | |
cb95d562 TH |
736 | return 0; |
737 | } | |
738 | ||
739 | /** | |
740 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
741 | * @xfer_mode: XFER_* of interest | |
742 | * | |
743 | * Return matching xfer_shift for @xfer_mode. | |
744 | * | |
745 | * LOCKING: | |
746 | * None. | |
747 | * | |
748 | * RETURNS: | |
749 | * Matching xfer_shift, -1 if no match found. | |
750 | */ | |
7dc951ae | 751 | int ata_xfer_mode2shift(unsigned long xfer_mode) |
cb95d562 TH |
752 | { |
753 | const struct ata_xfer_ent *ent; | |
754 | ||
755 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
756 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
757 | return ent->shift; | |
758 | return -1; | |
759 | } | |
760 | ||
1da177e4 | 761 | /** |
1da7b0d0 TH |
762 | * ata_mode_string - convert xfer_mask to string |
763 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
764 | * |
765 | * Determine string which represents the highest speed | |
1da7b0d0 | 766 | * (highest bit in @modemask). |
1da177e4 LT |
767 | * |
768 | * LOCKING: | |
769 | * None. | |
770 | * | |
771 | * RETURNS: | |
772 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 773 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 774 | */ |
7dc951ae | 775 | const char *ata_mode_string(unsigned long xfer_mask) |
1da177e4 | 776 | { |
75f554bc TH |
777 | static const char * const xfer_mode_str[] = { |
778 | "PIO0", | |
779 | "PIO1", | |
780 | "PIO2", | |
781 | "PIO3", | |
782 | "PIO4", | |
b352e57d AC |
783 | "PIO5", |
784 | "PIO6", | |
75f554bc TH |
785 | "MWDMA0", |
786 | "MWDMA1", | |
787 | "MWDMA2", | |
b352e57d AC |
788 | "MWDMA3", |
789 | "MWDMA4", | |
75f554bc TH |
790 | "UDMA/16", |
791 | "UDMA/25", | |
792 | "UDMA/33", | |
793 | "UDMA/44", | |
794 | "UDMA/66", | |
795 | "UDMA/100", | |
796 | "UDMA/133", | |
797 | "UDMA7", | |
798 | }; | |
1da7b0d0 | 799 | int highbit; |
1da177e4 | 800 | |
1da7b0d0 TH |
801 | highbit = fls(xfer_mask) - 1; |
802 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
803 | return xfer_mode_str[highbit]; | |
1da177e4 | 804 | return "<n/a>"; |
1da177e4 LT |
805 | } |
806 | ||
4c360c81 TH |
807 | static const char *sata_spd_string(unsigned int spd) |
808 | { | |
809 | static const char * const spd_str[] = { | |
810 | "1.5 Gbps", | |
811 | "3.0 Gbps", | |
812 | }; | |
813 | ||
814 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
815 | return "<unknown>"; | |
816 | return spd_str[spd - 1]; | |
817 | } | |
818 | ||
3373efd8 | 819 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 820 | { |
09d7f9b0 | 821 | if (ata_dev_enabled(dev)) { |
9af5c9c9 | 822 | if (ata_msg_drv(dev->link->ap)) |
09d7f9b0 | 823 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
562f0c2d | 824 | ata_acpi_on_disable(dev); |
4ae72a1e TH |
825 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
826 | ATA_DNXFER_QUIET); | |
0b8efb0a TH |
827 | dev->class++; |
828 | } | |
829 | } | |
830 | ||
ca77329f KCA |
831 | static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) |
832 | { | |
833 | struct ata_link *link = dev->link; | |
834 | struct ata_port *ap = link->ap; | |
835 | u32 scontrol; | |
836 | unsigned int err_mask; | |
837 | int rc; | |
838 | ||
839 | /* | |
840 | * disallow DIPM for drivers which haven't set | |
841 | * ATA_FLAG_IPM. This is because when DIPM is enabled, | |
842 | * phy ready will be set in the interrupt status on | |
843 | * state changes, which will cause some drivers to | |
844 | * think there are errors - additionally drivers will | |
845 | * need to disable hot plug. | |
846 | */ | |
847 | if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { | |
848 | ap->pm_policy = NOT_AVAILABLE; | |
849 | return -EINVAL; | |
850 | } | |
851 | ||
852 | /* | |
853 | * For DIPM, we will only enable it for the | |
854 | * min_power setting. | |
855 | * | |
856 | * Why? Because Disks are too stupid to know that | |
857 | * If the host rejects a request to go to SLUMBER | |
858 | * they should retry at PARTIAL, and instead it | |
859 | * just would give up. So, for medium_power to | |
860 | * work at all, we need to only allow HIPM. | |
861 | */ | |
862 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
863 | if (rc) | |
864 | return rc; | |
865 | ||
866 | switch (policy) { | |
867 | case MIN_POWER: | |
868 | /* no restrictions on IPM transitions */ | |
869 | scontrol &= ~(0x3 << 8); | |
870 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
871 | if (rc) | |
872 | return rc; | |
873 | ||
874 | /* enable DIPM */ | |
875 | if (dev->flags & ATA_DFLAG_DIPM) | |
876 | err_mask = ata_dev_set_feature(dev, | |
877 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
878 | break; | |
879 | case MEDIUM_POWER: | |
880 | /* allow IPM to PARTIAL */ | |
881 | scontrol &= ~(0x1 << 8); | |
882 | scontrol |= (0x2 << 8); | |
883 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
884 | if (rc) | |
885 | return rc; | |
886 | ||
f5456b63 KCA |
887 | /* |
888 | * we don't have to disable DIPM since IPM flags | |
889 | * disallow transitions to SLUMBER, which effectively | |
890 | * disable DIPM if it does not support PARTIAL | |
891 | */ | |
ca77329f KCA |
892 | break; |
893 | case NOT_AVAILABLE: | |
894 | case MAX_PERFORMANCE: | |
895 | /* disable all IPM transitions */ | |
896 | scontrol |= (0x3 << 8); | |
897 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
898 | if (rc) | |
899 | return rc; | |
900 | ||
f5456b63 KCA |
901 | /* |
902 | * we don't have to disable DIPM since IPM flags | |
903 | * disallow all transitions which effectively | |
904 | * disable DIPM anyway. | |
905 | */ | |
ca77329f KCA |
906 | break; |
907 | } | |
908 | ||
909 | /* FIXME: handle SET FEATURES failure */ | |
910 | (void) err_mask; | |
911 | ||
912 | return 0; | |
913 | } | |
914 | ||
915 | /** | |
916 | * ata_dev_enable_pm - enable SATA interface power management | |
48166fd9 SH |
917 | * @dev: device to enable power management |
918 | * @policy: the link power management policy | |
ca77329f KCA |
919 | * |
920 | * Enable SATA Interface power management. This will enable | |
921 | * Device Interface Power Management (DIPM) for min_power | |
922 | * policy, and then call driver specific callbacks for | |
923 | * enabling Host Initiated Power management. | |
924 | * | |
925 | * Locking: Caller. | |
926 | * Returns: -EINVAL if IPM is not supported, 0 otherwise. | |
927 | */ | |
928 | void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) | |
929 | { | |
930 | int rc = 0; | |
931 | struct ata_port *ap = dev->link->ap; | |
932 | ||
933 | /* set HIPM first, then DIPM */ | |
934 | if (ap->ops->enable_pm) | |
935 | rc = ap->ops->enable_pm(ap, policy); | |
936 | if (rc) | |
937 | goto enable_pm_out; | |
938 | rc = ata_dev_set_dipm(dev, policy); | |
939 | ||
940 | enable_pm_out: | |
941 | if (rc) | |
942 | ap->pm_policy = MAX_PERFORMANCE; | |
943 | else | |
944 | ap->pm_policy = policy; | |
945 | return /* rc */; /* hopefully we can use 'rc' eventually */ | |
946 | } | |
947 | ||
1992a5ed | 948 | #ifdef CONFIG_PM |
ca77329f KCA |
949 | /** |
950 | * ata_dev_disable_pm - disable SATA interface power management | |
48166fd9 | 951 | * @dev: device to disable power management |
ca77329f KCA |
952 | * |
953 | * Disable SATA Interface power management. This will disable | |
954 | * Device Interface Power Management (DIPM) without changing | |
955 | * policy, call driver specific callbacks for disabling Host | |
956 | * Initiated Power management. | |
957 | * | |
958 | * Locking: Caller. | |
959 | * Returns: void | |
960 | */ | |
961 | static void ata_dev_disable_pm(struct ata_device *dev) | |
962 | { | |
963 | struct ata_port *ap = dev->link->ap; | |
964 | ||
965 | ata_dev_set_dipm(dev, MAX_PERFORMANCE); | |
966 | if (ap->ops->disable_pm) | |
967 | ap->ops->disable_pm(ap); | |
968 | } | |
1992a5ed | 969 | #endif /* CONFIG_PM */ |
ca77329f KCA |
970 | |
971 | void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) | |
972 | { | |
973 | ap->pm_policy = policy; | |
974 | ap->link.eh_info.action |= ATA_EHI_LPM; | |
975 | ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; | |
976 | ata_port_schedule_eh(ap); | |
977 | } | |
978 | ||
1992a5ed | 979 | #ifdef CONFIG_PM |
ca77329f KCA |
980 | static void ata_lpm_enable(struct ata_host *host) |
981 | { | |
982 | struct ata_link *link; | |
983 | struct ata_port *ap; | |
984 | struct ata_device *dev; | |
985 | int i; | |
986 | ||
987 | for (i = 0; i < host->n_ports; i++) { | |
988 | ap = host->ports[i]; | |
989 | ata_port_for_each_link(link, ap) { | |
990 | ata_link_for_each_dev(dev, link) | |
991 | ata_dev_disable_pm(dev); | |
992 | } | |
993 | } | |
994 | } | |
995 | ||
996 | static void ata_lpm_disable(struct ata_host *host) | |
997 | { | |
998 | int i; | |
999 | ||
1000 | for (i = 0; i < host->n_ports; i++) { | |
1001 | struct ata_port *ap = host->ports[i]; | |
1002 | ata_lpm_schedule(ap, ap->pm_policy); | |
1003 | } | |
1004 | } | |
1992a5ed | 1005 | #endif /* CONFIG_PM */ |
ca77329f KCA |
1006 | |
1007 | ||
1da177e4 | 1008 | /** |
0d5ff566 | 1009 | * ata_devchk - PATA device presence detection |
1da177e4 LT |
1010 | * @ap: ATA channel to examine |
1011 | * @device: Device to examine (starting at zero) | |
1012 | * | |
1013 | * This technique was originally described in | |
1014 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
1015 | * later found its way into the ATA/ATAPI spec. | |
1016 | * | |
1017 | * Write a pattern to the ATA shadow registers, | |
1018 | * and if a device is present, it will respond by | |
1019 | * correctly storing and echoing back the | |
1020 | * ATA shadow register contents. | |
1021 | * | |
1022 | * LOCKING: | |
1023 | * caller. | |
1024 | */ | |
1025 | ||
0d5ff566 | 1026 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
1027 | { |
1028 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
1029 | u8 nsect, lbal; | |
1030 | ||
1031 | ap->ops->dev_select(ap, device); | |
1032 | ||
0d5ff566 TH |
1033 | iowrite8(0x55, ioaddr->nsect_addr); |
1034 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 1035 | |
0d5ff566 TH |
1036 | iowrite8(0xaa, ioaddr->nsect_addr); |
1037 | iowrite8(0x55, ioaddr->lbal_addr); | |
1da177e4 | 1038 | |
0d5ff566 TH |
1039 | iowrite8(0x55, ioaddr->nsect_addr); |
1040 | iowrite8(0xaa, ioaddr->lbal_addr); | |
1da177e4 | 1041 | |
0d5ff566 TH |
1042 | nsect = ioread8(ioaddr->nsect_addr); |
1043 | lbal = ioread8(ioaddr->lbal_addr); | |
1da177e4 LT |
1044 | |
1045 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
1046 | return 1; /* we found a device */ | |
1047 | ||
1048 | return 0; /* nothing found */ | |
1049 | } | |
1050 | ||
1da177e4 LT |
1051 | /** |
1052 | * ata_dev_classify - determine device type based on ATA-spec signature | |
1053 | * @tf: ATA taskfile register set for device to be identified | |
1054 | * | |
1055 | * Determine from taskfile register contents whether a device is | |
1056 | * ATA or ATAPI, as per "Signature and persistence" section | |
1057 | * of ATA/PI spec (volume 1, sect 5.14). | |
1058 | * | |
1059 | * LOCKING: | |
1060 | * None. | |
1061 | * | |
1062 | * RETURNS: | |
633273a3 TH |
1063 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
1064 | * %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 1065 | */ |
057ace5e | 1066 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
1067 | { |
1068 | /* Apple's open source Darwin code hints that some devices only | |
1069 | * put a proper signature into the LBA mid/high registers, | |
1070 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
1071 | * |
1072 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
1073 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
1074 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
1075 | * spec has never mentioned about using different signatures | |
1076 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
1077 | * Multiplier specification began to use 0x69/0x96 to identify | |
1078 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
1079 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
1080 | * 0x69/0x96 shortly and described them as reserved for | |
1081 | * SerialATA. | |
1082 | * | |
1083 | * We follow the current spec and consider that 0x69/0x96 | |
1084 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
1da177e4 | 1085 | */ |
633273a3 | 1086 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
1087 | DPRINTK("found ATA device by sig\n"); |
1088 | return ATA_DEV_ATA; | |
1089 | } | |
1090 | ||
633273a3 | 1091 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
1092 | DPRINTK("found ATAPI device by sig\n"); |
1093 | return ATA_DEV_ATAPI; | |
1094 | } | |
1095 | ||
633273a3 TH |
1096 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
1097 | DPRINTK("found PMP device by sig\n"); | |
1098 | return ATA_DEV_PMP; | |
1099 | } | |
1100 | ||
1101 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
2dcb407e | 1102 | printk(KERN_INFO "ata: SEMB device ignored\n"); |
633273a3 TH |
1103 | return ATA_DEV_SEMB_UNSUP; /* not yet */ |
1104 | } | |
1105 | ||
1da177e4 LT |
1106 | DPRINTK("unknown device\n"); |
1107 | return ATA_DEV_UNKNOWN; | |
1108 | } | |
1109 | ||
1110 | /** | |
1111 | * ata_dev_try_classify - Parse returned ATA device signature | |
3f19859e TH |
1112 | * @dev: ATA device to classify (starting at zero) |
1113 | * @present: device seems present | |
b4dc7623 | 1114 | * @r_err: Value of error register on completion |
1da177e4 LT |
1115 | * |
1116 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
1117 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
1118 | * shadow registers, indicating the results of device detection | |
1119 | * and diagnostics. | |
1120 | * | |
1121 | * Select the ATA device, and read the values from the ATA shadow | |
1122 | * registers. Then parse according to the Error register value, | |
1123 | * and the spec-defined values examined by ata_dev_classify(). | |
1124 | * | |
1125 | * LOCKING: | |
1126 | * caller. | |
b4dc7623 TH |
1127 | * |
1128 | * RETURNS: | |
1129 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 | 1130 | */ |
3f19859e TH |
1131 | unsigned int ata_dev_try_classify(struct ata_device *dev, int present, |
1132 | u8 *r_err) | |
1da177e4 | 1133 | { |
3f19859e | 1134 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
1135 | struct ata_taskfile tf; |
1136 | unsigned int class; | |
1137 | u8 err; | |
1138 | ||
3f19859e | 1139 | ap->ops->dev_select(ap, dev->devno); |
1da177e4 LT |
1140 | |
1141 | memset(&tf, 0, sizeof(tf)); | |
1142 | ||
1da177e4 | 1143 | ap->ops->tf_read(ap, &tf); |
0169e284 | 1144 | err = tf.feature; |
b4dc7623 TH |
1145 | if (r_err) |
1146 | *r_err = err; | |
1da177e4 | 1147 | |
c5038fc0 AC |
1148 | /* see if device passed diags: continue and warn later */ |
1149 | if (err == 0) | |
93590859 | 1150 | /* diagnostic fail : do nothing _YET_ */ |
3f19859e | 1151 | dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; |
93590859 | 1152 | else if (err == 1) |
1da177e4 | 1153 | /* do nothing */ ; |
3f19859e | 1154 | else if ((dev->devno == 0) && (err == 0x81)) |
1da177e4 LT |
1155 | /* do nothing */ ; |
1156 | else | |
b4dc7623 | 1157 | return ATA_DEV_NONE; |
1da177e4 | 1158 | |
b4dc7623 | 1159 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 1160 | class = ata_dev_classify(&tf); |
b4dc7623 | 1161 | |
d7fbee05 TH |
1162 | if (class == ATA_DEV_UNKNOWN) { |
1163 | /* If the device failed diagnostic, it's likely to | |
1164 | * have reported incorrect device signature too. | |
1165 | * Assume ATA device if the device seems present but | |
1166 | * device signature is invalid with diagnostic | |
1167 | * failure. | |
1168 | */ | |
1169 | if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) | |
1170 | class = ATA_DEV_ATA; | |
1171 | else | |
1172 | class = ATA_DEV_NONE; | |
1173 | } else if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) | |
1174 | class = ATA_DEV_NONE; | |
1175 | ||
b4dc7623 | 1176 | return class; |
1da177e4 LT |
1177 | } |
1178 | ||
1179 | /** | |
6a62a04d | 1180 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
1181 | * @id: IDENTIFY DEVICE results we will examine |
1182 | * @s: string into which data is output | |
1183 | * @ofs: offset into identify device page | |
1184 | * @len: length of string to return. must be an even number. | |
1185 | * | |
1186 | * The strings in the IDENTIFY DEVICE page are broken up into | |
1187 | * 16-bit chunks. Run through the string, and output each | |
1188 | * 8-bit chunk linearly, regardless of platform. | |
1189 | * | |
1190 | * LOCKING: | |
1191 | * caller. | |
1192 | */ | |
1193 | ||
6a62a04d TH |
1194 | void ata_id_string(const u16 *id, unsigned char *s, |
1195 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
1196 | { |
1197 | unsigned int c; | |
1198 | ||
1199 | while (len > 0) { | |
1200 | c = id[ofs] >> 8; | |
1201 | *s = c; | |
1202 | s++; | |
1203 | ||
1204 | c = id[ofs] & 0xff; | |
1205 | *s = c; | |
1206 | s++; | |
1207 | ||
1208 | ofs++; | |
1209 | len -= 2; | |
1210 | } | |
1211 | } | |
1212 | ||
0e949ff3 | 1213 | /** |
6a62a04d | 1214 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
1215 | * @id: IDENTIFY DEVICE results we will examine |
1216 | * @s: string into which data is output | |
1217 | * @ofs: offset into identify device page | |
1218 | * @len: length of string to return. must be an odd number. | |
1219 | * | |
6a62a04d | 1220 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
1221 | * trims trailing spaces and terminates the resulting string with |
1222 | * null. @len must be actual maximum length (even number) + 1. | |
1223 | * | |
1224 | * LOCKING: | |
1225 | * caller. | |
1226 | */ | |
6a62a04d TH |
1227 | void ata_id_c_string(const u16 *id, unsigned char *s, |
1228 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
1229 | { |
1230 | unsigned char *p; | |
1231 | ||
1232 | WARN_ON(!(len & 1)); | |
1233 | ||
6a62a04d | 1234 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
1235 | |
1236 | p = s + strnlen(s, len - 1); | |
1237 | while (p > s && p[-1] == ' ') | |
1238 | p--; | |
1239 | *p = '\0'; | |
1240 | } | |
0baab86b | 1241 | |
db6f8759 TH |
1242 | static u64 ata_id_n_sectors(const u16 *id) |
1243 | { | |
1244 | if (ata_id_has_lba(id)) { | |
1245 | if (ata_id_has_lba48(id)) | |
1246 | return ata_id_u64(id, 100); | |
1247 | else | |
1248 | return ata_id_u32(id, 60); | |
1249 | } else { | |
1250 | if (ata_id_current_chs_valid(id)) | |
1251 | return ata_id_u32(id, 57); | |
1252 | else | |
1253 | return id[1] * id[3] * id[6]; | |
1254 | } | |
1255 | } | |
1256 | ||
1e999736 AC |
1257 | static u64 ata_tf_to_lba48(struct ata_taskfile *tf) |
1258 | { | |
1259 | u64 sectors = 0; | |
1260 | ||
1261 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
1262 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
1263 | sectors |= (tf->hob_lbal & 0xff) << 24; | |
1264 | sectors |= (tf->lbah & 0xff) << 16; | |
1265 | sectors |= (tf->lbam & 0xff) << 8; | |
1266 | sectors |= (tf->lbal & 0xff); | |
1267 | ||
1268 | return ++sectors; | |
1269 | } | |
1270 | ||
1271 | static u64 ata_tf_to_lba(struct ata_taskfile *tf) | |
1272 | { | |
1273 | u64 sectors = 0; | |
1274 | ||
1275 | sectors |= (tf->device & 0x0f) << 24; | |
1276 | sectors |= (tf->lbah & 0xff) << 16; | |
1277 | sectors |= (tf->lbam & 0xff) << 8; | |
1278 | sectors |= (tf->lbal & 0xff); | |
1279 | ||
1280 | return ++sectors; | |
1281 | } | |
1282 | ||
1283 | /** | |
c728a914 TH |
1284 | * ata_read_native_max_address - Read native max address |
1285 | * @dev: target device | |
1286 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 1287 | * |
c728a914 TH |
1288 | * Perform an LBA48 or LBA28 native size query upon the device in |
1289 | * question. | |
1e999736 | 1290 | * |
c728a914 TH |
1291 | * RETURNS: |
1292 | * 0 on success, -EACCES if command is aborted by the drive. | |
1293 | * -EIO on other errors. | |
1e999736 | 1294 | */ |
c728a914 | 1295 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 1296 | { |
c728a914 | 1297 | unsigned int err_mask; |
1e999736 | 1298 | struct ata_taskfile tf; |
c728a914 | 1299 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1300 | |
1301 | ata_tf_init(dev, &tf); | |
1302 | ||
c728a914 | 1303 | /* always clear all address registers */ |
1e999736 | 1304 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 1305 | |
c728a914 TH |
1306 | if (lba48) { |
1307 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
1308 | tf.flags |= ATA_TFLAG_LBA48; | |
1309 | } else | |
1310 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 1311 | |
1e999736 | 1312 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
1313 | tf.device |= ATA_LBA; |
1314 | ||
2b789108 | 1315 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1316 | if (err_mask) { |
1317 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " | |
1318 | "max address (err_mask=0x%x)\n", err_mask); | |
1319 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
1320 | return -EACCES; | |
1321 | return -EIO; | |
1322 | } | |
1e999736 | 1323 | |
c728a914 TH |
1324 | if (lba48) |
1325 | *max_sectors = ata_tf_to_lba48(&tf); | |
1326 | else | |
1327 | *max_sectors = ata_tf_to_lba(&tf); | |
2dcb407e | 1328 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
93328e11 | 1329 | (*max_sectors)--; |
c728a914 | 1330 | return 0; |
1e999736 AC |
1331 | } |
1332 | ||
1333 | /** | |
c728a914 TH |
1334 | * ata_set_max_sectors - Set max sectors |
1335 | * @dev: target device | |
6b38d1d1 | 1336 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 1337 | * |
c728a914 TH |
1338 | * Set max sectors of @dev to @new_sectors. |
1339 | * | |
1340 | * RETURNS: | |
1341 | * 0 on success, -EACCES if command is aborted or denied (due to | |
1342 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
1343 | * errors. | |
1e999736 | 1344 | */ |
05027adc | 1345 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 1346 | { |
c728a914 | 1347 | unsigned int err_mask; |
1e999736 | 1348 | struct ata_taskfile tf; |
c728a914 | 1349 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1350 | |
1351 | new_sectors--; | |
1352 | ||
1353 | ata_tf_init(dev, &tf); | |
1354 | ||
1e999736 | 1355 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
1356 | |
1357 | if (lba48) { | |
1358 | tf.command = ATA_CMD_SET_MAX_EXT; | |
1359 | tf.flags |= ATA_TFLAG_LBA48; | |
1360 | ||
1361 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
1362 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
1363 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 1364 | } else { |
c728a914 TH |
1365 | tf.command = ATA_CMD_SET_MAX; |
1366 | ||
1e582ba4 TH |
1367 | tf.device |= (new_sectors >> 24) & 0xf; |
1368 | } | |
1369 | ||
1e999736 | 1370 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 1371 | tf.device |= ATA_LBA; |
1e999736 AC |
1372 | |
1373 | tf.lbal = (new_sectors >> 0) & 0xff; | |
1374 | tf.lbam = (new_sectors >> 8) & 0xff; | |
1375 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 1376 | |
2b789108 | 1377 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1378 | if (err_mask) { |
1379 | ata_dev_printk(dev, KERN_WARNING, "failed to set " | |
1380 | "max address (err_mask=0x%x)\n", err_mask); | |
1381 | if (err_mask == AC_ERR_DEV && | |
1382 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
1383 | return -EACCES; | |
1384 | return -EIO; | |
1385 | } | |
1386 | ||
c728a914 | 1387 | return 0; |
1e999736 AC |
1388 | } |
1389 | ||
1390 | /** | |
1391 | * ata_hpa_resize - Resize a device with an HPA set | |
1392 | * @dev: Device to resize | |
1393 | * | |
1394 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1395 | * it if required to the full size of the media. The caller must check | |
1396 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1397 | * |
1398 | * RETURNS: | |
1399 | * 0 on success, -errno on failure. | |
1e999736 | 1400 | */ |
05027adc | 1401 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1402 | { |
05027adc TH |
1403 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1404 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
1405 | u64 sectors = ata_id_n_sectors(dev->id); | |
1406 | u64 native_sectors; | |
c728a914 | 1407 | int rc; |
a617c09f | 1408 | |
05027adc TH |
1409 | /* do we need to do it? */ |
1410 | if (dev->class != ATA_DEV_ATA || | |
1411 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || | |
1412 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1413 | return 0; |
1e999736 | 1414 | |
05027adc TH |
1415 | /* read native max address */ |
1416 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1417 | if (rc) { | |
1418 | /* If HPA isn't going to be unlocked, skip HPA | |
1419 | * resizing from the next try. | |
1420 | */ | |
1421 | if (!ata_ignore_hpa) { | |
1422 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " | |
1423 | "broken, will skip HPA handling\n"); | |
1424 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1425 | ||
1426 | /* we can continue if device aborted the command */ | |
1427 | if (rc == -EACCES) | |
1428 | rc = 0; | |
1e999736 | 1429 | } |
37301a55 | 1430 | |
05027adc TH |
1431 | return rc; |
1432 | } | |
1433 | ||
1434 | /* nothing to do? */ | |
1435 | if (native_sectors <= sectors || !ata_ignore_hpa) { | |
1436 | if (!print_info || native_sectors == sectors) | |
1437 | return 0; | |
1438 | ||
1439 | if (native_sectors > sectors) | |
1440 | ata_dev_printk(dev, KERN_INFO, | |
1441 | "HPA detected: current %llu, native %llu\n", | |
1442 | (unsigned long long)sectors, | |
1443 | (unsigned long long)native_sectors); | |
1444 | else if (native_sectors < sectors) | |
1445 | ata_dev_printk(dev, KERN_WARNING, | |
1446 | "native sectors (%llu) is smaller than " | |
1447 | "sectors (%llu)\n", | |
1448 | (unsigned long long)native_sectors, | |
1449 | (unsigned long long)sectors); | |
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | /* let's unlock HPA */ | |
1454 | rc = ata_set_max_sectors(dev, native_sectors); | |
1455 | if (rc == -EACCES) { | |
1456 | /* if device aborted the command, skip HPA resizing */ | |
1457 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " | |
1458 | "(%llu -> %llu), skipping HPA handling\n", | |
1459 | (unsigned long long)sectors, | |
1460 | (unsigned long long)native_sectors); | |
1461 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1462 | return 0; | |
1463 | } else if (rc) | |
1464 | return rc; | |
1465 | ||
1466 | /* re-read IDENTIFY data */ | |
1467 | rc = ata_dev_reread_id(dev, 0); | |
1468 | if (rc) { | |
1469 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " | |
1470 | "data after HPA resizing\n"); | |
1471 | return rc; | |
1472 | } | |
1473 | ||
1474 | if (print_info) { | |
1475 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
1476 | ata_dev_printk(dev, KERN_INFO, | |
1477 | "HPA unlocked: %llu -> %llu, native %llu\n", | |
1478 | (unsigned long long)sectors, | |
1479 | (unsigned long long)new_sectors, | |
1480 | (unsigned long long)native_sectors); | |
1481 | } | |
1482 | ||
1483 | return 0; | |
1e999736 AC |
1484 | } |
1485 | ||
0baab86b EF |
1486 | /** |
1487 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
1488 | * @ap: ATA channel to manipulate | |
1489 | * @device: ATA device (numbered from zero) to select | |
1490 | * | |
1491 | * This function performs no actual function. | |
1492 | * | |
1493 | * May be used as the dev_select() entry in ata_port_operations. | |
1494 | * | |
1495 | * LOCKING: | |
1496 | * caller. | |
1497 | */ | |
2dcb407e | 1498 | void ata_noop_dev_select(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
1499 | { |
1500 | } | |
1501 | ||
0baab86b | 1502 | |
1da177e4 LT |
1503 | /** |
1504 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
1505 | * @ap: ATA channel to manipulate | |
1506 | * @device: ATA device (numbered from zero) to select | |
1507 | * | |
1508 | * Use the method defined in the ATA specification to | |
1509 | * make either device 0, or device 1, active on the | |
0baab86b EF |
1510 | * ATA channel. Works with both PIO and MMIO. |
1511 | * | |
1512 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
1513 | * |
1514 | * LOCKING: | |
1515 | * caller. | |
1516 | */ | |
1517 | ||
2dcb407e | 1518 | void ata_std_dev_select(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
1519 | { |
1520 | u8 tmp; | |
1521 | ||
1522 | if (device == 0) | |
1523 | tmp = ATA_DEVICE_OBS; | |
1524 | else | |
1525 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
1526 | ||
0d5ff566 | 1527 | iowrite8(tmp, ap->ioaddr.device_addr); |
1da177e4 LT |
1528 | ata_pause(ap); /* needed; also flushes, for mmio */ |
1529 | } | |
1530 | ||
1531 | /** | |
1532 | * ata_dev_select - Select device 0/1 on ATA bus | |
1533 | * @ap: ATA channel to manipulate | |
1534 | * @device: ATA device (numbered from zero) to select | |
1535 | * @wait: non-zero to wait for Status register BSY bit to clear | |
1536 | * @can_sleep: non-zero if context allows sleeping | |
1537 | * | |
1538 | * Use the method defined in the ATA specification to | |
1539 | * make either device 0, or device 1, active on the | |
1540 | * ATA channel. | |
1541 | * | |
1542 | * This is a high-level version of ata_std_dev_select(), | |
1543 | * which additionally provides the services of inserting | |
1544 | * the proper pauses and status polling, where needed. | |
1545 | * | |
1546 | * LOCKING: | |
1547 | * caller. | |
1548 | */ | |
1549 | ||
1550 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
1551 | unsigned int wait, unsigned int can_sleep) | |
1552 | { | |
88574551 | 1553 | if (ata_msg_probe(ap)) |
44877b4e TH |
1554 | ata_port_printk(ap, KERN_INFO, "ata_dev_select: ENTER, " |
1555 | "device %u, wait %u\n", device, wait); | |
1da177e4 LT |
1556 | |
1557 | if (wait) | |
1558 | ata_wait_idle(ap); | |
1559 | ||
1560 | ap->ops->dev_select(ap, device); | |
1561 | ||
1562 | if (wait) { | |
9af5c9c9 | 1563 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) |
1da177e4 LT |
1564 | msleep(150); |
1565 | ata_wait_idle(ap); | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | /** | |
1570 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1571 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1572 | * |
0bd3300a TH |
1573 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1574 | * page. | |
1da177e4 LT |
1575 | * |
1576 | * LOCKING: | |
1577 | * caller. | |
1578 | */ | |
1579 | ||
0bd3300a | 1580 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1581 | { |
1582 | DPRINTK("49==0x%04x " | |
1583 | "53==0x%04x " | |
1584 | "63==0x%04x " | |
1585 | "64==0x%04x " | |
1586 | "75==0x%04x \n", | |
0bd3300a TH |
1587 | id[49], |
1588 | id[53], | |
1589 | id[63], | |
1590 | id[64], | |
1591 | id[75]); | |
1da177e4 LT |
1592 | DPRINTK("80==0x%04x " |
1593 | "81==0x%04x " | |
1594 | "82==0x%04x " | |
1595 | "83==0x%04x " | |
1596 | "84==0x%04x \n", | |
0bd3300a TH |
1597 | id[80], |
1598 | id[81], | |
1599 | id[82], | |
1600 | id[83], | |
1601 | id[84]); | |
1da177e4 LT |
1602 | DPRINTK("88==0x%04x " |
1603 | "93==0x%04x\n", | |
0bd3300a TH |
1604 | id[88], |
1605 | id[93]); | |
1da177e4 LT |
1606 | } |
1607 | ||
cb95d562 TH |
1608 | /** |
1609 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1610 | * @id: IDENTIFY data to compute xfer mask from | |
1611 | * | |
1612 | * Compute the xfermask for this device. This is not as trivial | |
1613 | * as it seems if we must consider early devices correctly. | |
1614 | * | |
1615 | * FIXME: pre IDE drive timing (do we care ?). | |
1616 | * | |
1617 | * LOCKING: | |
1618 | * None. | |
1619 | * | |
1620 | * RETURNS: | |
1621 | * Computed xfermask | |
1622 | */ | |
7dc951ae | 1623 | unsigned long ata_id_xfermask(const u16 *id) |
cb95d562 | 1624 | { |
7dc951ae | 1625 | unsigned long pio_mask, mwdma_mask, udma_mask; |
cb95d562 TH |
1626 | |
1627 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1628 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1629 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1630 | pio_mask <<= 3; | |
1631 | pio_mask |= 0x7; | |
1632 | } else { | |
1633 | /* If word 64 isn't valid then Word 51 high byte holds | |
1634 | * the PIO timing number for the maximum. Turn it into | |
1635 | * a mask. | |
1636 | */ | |
7a0f1c8a | 1637 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb | 1638 | if (mode < 5) /* Valid PIO range */ |
2dcb407e | 1639 | pio_mask = (2 << mode) - 1; |
46767aeb AC |
1640 | else |
1641 | pio_mask = 1; | |
cb95d562 TH |
1642 | |
1643 | /* But wait.. there's more. Design your standards by | |
1644 | * committee and you too can get a free iordy field to | |
1645 | * process. However its the speeds not the modes that | |
1646 | * are supported... Note drivers using the timing API | |
1647 | * will get this right anyway | |
1648 | */ | |
1649 | } | |
1650 | ||
1651 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1652 | |
b352e57d AC |
1653 | if (ata_id_is_cfa(id)) { |
1654 | /* | |
1655 | * Process compact flash extended modes | |
1656 | */ | |
1657 | int pio = id[163] & 0x7; | |
1658 | int dma = (id[163] >> 3) & 7; | |
1659 | ||
1660 | if (pio) | |
1661 | pio_mask |= (1 << 5); | |
1662 | if (pio > 1) | |
1663 | pio_mask |= (1 << 6); | |
1664 | if (dma) | |
1665 | mwdma_mask |= (1 << 3); | |
1666 | if (dma > 1) | |
1667 | mwdma_mask |= (1 << 4); | |
1668 | } | |
1669 | ||
fb21f0d0 TH |
1670 | udma_mask = 0; |
1671 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1672 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1673 | |
1674 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1675 | } | |
1676 | ||
86e45b6b | 1677 | /** |
442eacc3 | 1678 | * ata_pio_queue_task - Queue port_task |
86e45b6b | 1679 | * @ap: The ata_port to queue port_task for |
e2a7f77a | 1680 | * @fn: workqueue function to be scheduled |
65f27f38 | 1681 | * @data: data for @fn to use |
e2a7f77a | 1682 | * @delay: delay time for workqueue function |
86e45b6b TH |
1683 | * |
1684 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1685 | * port_task. There is one port_task per port and it's the | |
1686 | * user(low level driver)'s responsibility to make sure that only | |
1687 | * one task is active at any given time. | |
1688 | * | |
1689 | * libata core layer takes care of synchronization between | |
442eacc3 | 1690 | * port_task and EH. ata_pio_queue_task() may be ignored for EH |
86e45b6b TH |
1691 | * synchronization. |
1692 | * | |
1693 | * LOCKING: | |
1694 | * Inherited from caller. | |
1695 | */ | |
442eacc3 JG |
1696 | static void ata_pio_queue_task(struct ata_port *ap, void *data, |
1697 | unsigned long delay) | |
86e45b6b | 1698 | { |
65f27f38 | 1699 | ap->port_task_data = data; |
86e45b6b | 1700 | |
45a66c1c ON |
1701 | /* may fail if ata_port_flush_task() in progress */ |
1702 | queue_delayed_work(ata_wq, &ap->port_task, delay); | |
86e45b6b TH |
1703 | } |
1704 | ||
1705 | /** | |
1706 | * ata_port_flush_task - Flush port_task | |
1707 | * @ap: The ata_port to flush port_task for | |
1708 | * | |
1709 | * After this function completes, port_task is guranteed not to | |
1710 | * be running or scheduled. | |
1711 | * | |
1712 | * LOCKING: | |
1713 | * Kernel thread context (may sleep) | |
1714 | */ | |
1715 | void ata_port_flush_task(struct ata_port *ap) | |
1716 | { | |
86e45b6b TH |
1717 | DPRINTK("ENTER\n"); |
1718 | ||
45a66c1c | 1719 | cancel_rearming_delayed_work(&ap->port_task); |
86e45b6b | 1720 | |
0dd4b21f BP |
1721 | if (ata_msg_ctl(ap)) |
1722 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __FUNCTION__); | |
86e45b6b TH |
1723 | } |
1724 | ||
7102d230 | 1725 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1726 | { |
77853bf2 | 1727 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1728 | |
a2a7a662 | 1729 | complete(waiting); |
a2a7a662 TH |
1730 | } |
1731 | ||
1732 | /** | |
2432697b | 1733 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1734 | * @dev: Device to which the command is sent |
1735 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1736 | * @cdb: CDB for packet command |
a2a7a662 | 1737 | * @dma_dir: Data tranfer direction of the command |
5c1ad8b3 | 1738 | * @sgl: sg list for the data buffer of the command |
2432697b | 1739 | * @n_elem: Number of sg entries |
2b789108 | 1740 | * @timeout: Timeout in msecs (0 for default) |
a2a7a662 TH |
1741 | * |
1742 | * Executes libata internal command with timeout. @tf contains | |
1743 | * command on entry and result on return. Timeout and error | |
1744 | * conditions are reported via return value. No recovery action | |
1745 | * is taken after a command times out. It's caller's duty to | |
1746 | * clean up after timeout. | |
1747 | * | |
1748 | * LOCKING: | |
1749 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1750 | * |
1751 | * RETURNS: | |
1752 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1753 | */ |
2432697b TH |
1754 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1755 | struct ata_taskfile *tf, const u8 *cdb, | |
87260216 | 1756 | int dma_dir, struct scatterlist *sgl, |
2b789108 | 1757 | unsigned int n_elem, unsigned long timeout) |
a2a7a662 | 1758 | { |
9af5c9c9 TH |
1759 | struct ata_link *link = dev->link; |
1760 | struct ata_port *ap = link->ap; | |
a2a7a662 TH |
1761 | u8 command = tf->command; |
1762 | struct ata_queued_cmd *qc; | |
2ab7db1f | 1763 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1764 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1765 | int preempted_nr_active_links; |
60be6b9a | 1766 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1767 | unsigned long flags; |
77853bf2 | 1768 | unsigned int err_mask; |
d95a717f | 1769 | int rc; |
a2a7a662 | 1770 | |
ba6a1308 | 1771 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1772 | |
e3180499 | 1773 | /* no internal command while frozen */ |
b51e9e5d | 1774 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1775 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1776 | return AC_ERR_SYSTEM; |
1777 | } | |
1778 | ||
2ab7db1f | 1779 | /* initialize internal qc */ |
a2a7a662 | 1780 | |
2ab7db1f TH |
1781 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1782 | * drivers choke if any other tag is given. This breaks | |
1783 | * ata_tag_internal() test for those drivers. Don't use new | |
1784 | * EH stuff without converting to it. | |
1785 | */ | |
1786 | if (ap->ops->error_handler) | |
1787 | tag = ATA_TAG_INTERNAL; | |
1788 | else | |
1789 | tag = 0; | |
1790 | ||
6cec4a39 | 1791 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
2ab7db1f | 1792 | BUG(); |
f69499f4 | 1793 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1794 | |
1795 | qc->tag = tag; | |
1796 | qc->scsicmd = NULL; | |
1797 | qc->ap = ap; | |
1798 | qc->dev = dev; | |
1799 | ata_qc_reinit(qc); | |
1800 | ||
9af5c9c9 TH |
1801 | preempted_tag = link->active_tag; |
1802 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1803 | preempted_qc_active = ap->qc_active; |
da917d69 | 1804 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1805 | link->active_tag = ATA_TAG_POISON; |
1806 | link->sactive = 0; | |
dedaf2b0 | 1807 | ap->qc_active = 0; |
da917d69 | 1808 | ap->nr_active_links = 0; |
2ab7db1f TH |
1809 | |
1810 | /* prepare & issue qc */ | |
a2a7a662 | 1811 | qc->tf = *tf; |
d69cf37d TH |
1812 | if (cdb) |
1813 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1814 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1815 | qc->dma_dir = dma_dir; |
1816 | if (dma_dir != DMA_NONE) { | |
2432697b | 1817 | unsigned int i, buflen = 0; |
87260216 | 1818 | struct scatterlist *sg; |
2432697b | 1819 | |
87260216 JA |
1820 | for_each_sg(sgl, sg, n_elem, i) |
1821 | buflen += sg->length; | |
2432697b | 1822 | |
87260216 | 1823 | ata_sg_init(qc, sgl, n_elem); |
49c80429 | 1824 | qc->nbytes = buflen; |
a2a7a662 TH |
1825 | } |
1826 | ||
77853bf2 | 1827 | qc->private_data = &wait; |
a2a7a662 TH |
1828 | qc->complete_fn = ata_qc_complete_internal; |
1829 | ||
8e0e694a | 1830 | ata_qc_issue(qc); |
a2a7a662 | 1831 | |
ba6a1308 | 1832 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1833 | |
2b789108 TH |
1834 | if (!timeout) |
1835 | timeout = ata_probe_timeout * 1000 / HZ; | |
1836 | ||
1837 | rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); | |
d95a717f TH |
1838 | |
1839 | ata_port_flush_task(ap); | |
41ade50c | 1840 | |
d95a717f | 1841 | if (!rc) { |
ba6a1308 | 1842 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1843 | |
1844 | /* We're racing with irq here. If we lose, the | |
1845 | * following test prevents us from completing the qc | |
d95a717f TH |
1846 | * twice. If we win, the port is frozen and will be |
1847 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1848 | */ |
77853bf2 | 1849 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1850 | qc->err_mask |= AC_ERR_TIMEOUT; |
1851 | ||
1852 | if (ap->ops->error_handler) | |
1853 | ata_port_freeze(ap); | |
1854 | else | |
1855 | ata_qc_complete(qc); | |
f15a1daf | 1856 | |
0dd4b21f BP |
1857 | if (ata_msg_warn(ap)) |
1858 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1859 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1860 | } |
1861 | ||
ba6a1308 | 1862 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1863 | } |
1864 | ||
d95a717f TH |
1865 | /* do post_internal_cmd */ |
1866 | if (ap->ops->post_internal_cmd) | |
1867 | ap->ops->post_internal_cmd(qc); | |
1868 | ||
a51d644a TH |
1869 | /* perform minimal error analysis */ |
1870 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1871 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1872 | qc->err_mask |= AC_ERR_DEV; | |
1873 | ||
1874 | if (!qc->err_mask) | |
1875 | qc->err_mask |= AC_ERR_OTHER; | |
1876 | ||
1877 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1878 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1879 | } |
1880 | ||
15869303 | 1881 | /* finish up */ |
ba6a1308 | 1882 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1883 | |
e61e0672 | 1884 | *tf = qc->result_tf; |
77853bf2 TH |
1885 | err_mask = qc->err_mask; |
1886 | ||
1887 | ata_qc_free(qc); | |
9af5c9c9 TH |
1888 | link->active_tag = preempted_tag; |
1889 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1890 | ap->qc_active = preempted_qc_active; |
da917d69 | 1891 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1892 | |
1f7dd3e9 TH |
1893 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1894 | * Until those drivers are fixed, we detect the condition | |
1895 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1896 | * port. | |
1897 | * | |
1898 | * Note that this doesn't change any behavior as internal | |
1899 | * command failure results in disabling the device in the | |
1900 | * higher layer for LLDDs without new reset/EH callbacks. | |
1901 | * | |
1902 | * Kill the following code as soon as those drivers are fixed. | |
1903 | */ | |
198e0fed | 1904 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1905 | err_mask |= AC_ERR_SYSTEM; |
1906 | ata_port_probe(ap); | |
1907 | } | |
1908 | ||
ba6a1308 | 1909 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1910 | |
77853bf2 | 1911 | return err_mask; |
a2a7a662 TH |
1912 | } |
1913 | ||
2432697b | 1914 | /** |
33480a0e | 1915 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1916 | * @dev: Device to which the command is sent |
1917 | * @tf: Taskfile registers for the command and the result | |
1918 | * @cdb: CDB for packet command | |
1919 | * @dma_dir: Data tranfer direction of the command | |
1920 | * @buf: Data buffer of the command | |
1921 | * @buflen: Length of data buffer | |
2b789108 | 1922 | * @timeout: Timeout in msecs (0 for default) |
2432697b TH |
1923 | * |
1924 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1925 | * buffer instead of sg list. | |
1926 | * | |
1927 | * LOCKING: | |
1928 | * None. Should be called with kernel context, might sleep. | |
1929 | * | |
1930 | * RETURNS: | |
1931 | * Zero on success, AC_ERR_* mask on failure | |
1932 | */ | |
1933 | unsigned ata_exec_internal(struct ata_device *dev, | |
1934 | struct ata_taskfile *tf, const u8 *cdb, | |
2b789108 TH |
1935 | int dma_dir, void *buf, unsigned int buflen, |
1936 | unsigned long timeout) | |
2432697b | 1937 | { |
33480a0e TH |
1938 | struct scatterlist *psg = NULL, sg; |
1939 | unsigned int n_elem = 0; | |
2432697b | 1940 | |
33480a0e TH |
1941 | if (dma_dir != DMA_NONE) { |
1942 | WARN_ON(!buf); | |
1943 | sg_init_one(&sg, buf, buflen); | |
1944 | psg = &sg; | |
1945 | n_elem++; | |
1946 | } | |
2432697b | 1947 | |
2b789108 TH |
1948 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
1949 | timeout); | |
2432697b TH |
1950 | } |
1951 | ||
977e6b9f TH |
1952 | /** |
1953 | * ata_do_simple_cmd - execute simple internal command | |
1954 | * @dev: Device to which the command is sent | |
1955 | * @cmd: Opcode to execute | |
1956 | * | |
1957 | * Execute a 'simple' command, that only consists of the opcode | |
1958 | * 'cmd' itself, without filling any other registers | |
1959 | * | |
1960 | * LOCKING: | |
1961 | * Kernel thread context (may sleep). | |
1962 | * | |
1963 | * RETURNS: | |
1964 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1965 | */ |
77b08fb5 | 1966 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1967 | { |
1968 | struct ata_taskfile tf; | |
e58eb583 TH |
1969 | |
1970 | ata_tf_init(dev, &tf); | |
1971 | ||
1972 | tf.command = cmd; | |
1973 | tf.flags |= ATA_TFLAG_DEVICE; | |
1974 | tf.protocol = ATA_PROT_NODATA; | |
1975 | ||
2b789108 | 1976 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
e58eb583 TH |
1977 | } |
1978 | ||
1bc4ccff AC |
1979 | /** |
1980 | * ata_pio_need_iordy - check if iordy needed | |
1981 | * @adev: ATA device | |
1982 | * | |
1983 | * Check if the current speed of the device requires IORDY. Used | |
1984 | * by various controllers for chip configuration. | |
1985 | */ | |
a617c09f | 1986 | |
1bc4ccff AC |
1987 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1988 | { | |
432729f0 AC |
1989 | /* Controller doesn't support IORDY. Probably a pointless check |
1990 | as the caller should know this */ | |
9af5c9c9 | 1991 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 1992 | return 0; |
432729f0 AC |
1993 | /* PIO3 and higher it is mandatory */ |
1994 | if (adev->pio_mode > XFER_PIO_2) | |
1995 | return 1; | |
1996 | /* We turn it on when possible */ | |
1997 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1998 | return 1; |
432729f0 AC |
1999 | return 0; |
2000 | } | |
2e9edbf8 | 2001 | |
432729f0 AC |
2002 | /** |
2003 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
2004 | * @adev: ATA device | |
2005 | * | |
2006 | * Compute the highest mode possible if we are not using iordy. Return | |
2007 | * -1 if no iordy mode is available. | |
2008 | */ | |
a617c09f | 2009 | |
432729f0 AC |
2010 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
2011 | { | |
1bc4ccff | 2012 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 2013 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 2014 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
2015 | /* Is the speed faster than the drive allows non IORDY ? */ |
2016 | if (pio) { | |
2017 | /* This is cycle times not frequency - watch the logic! */ | |
2018 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
2019 | return 3 << ATA_SHIFT_PIO; |
2020 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
2021 | } |
2022 | } | |
432729f0 | 2023 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
2024 | } |
2025 | ||
1da177e4 | 2026 | /** |
49016aca | 2027 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
2028 | * @dev: target device |
2029 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 2030 | * @flags: ATA_READID_* flags |
fe635c7e | 2031 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 2032 | * |
49016aca TH |
2033 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
2034 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
2035 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
2036 | * for pre-ATA4 drives. | |
1da177e4 | 2037 | * |
50a99018 | 2038 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
2dcb407e | 2039 | * now we abort if we hit that case. |
50a99018 | 2040 | * |
1da177e4 | 2041 | * LOCKING: |
49016aca TH |
2042 | * Kernel thread context (may sleep) |
2043 | * | |
2044 | * RETURNS: | |
2045 | * 0 on success, -errno otherwise. | |
1da177e4 | 2046 | */ |
a9beec95 | 2047 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 2048 | unsigned int flags, u16 *id) |
1da177e4 | 2049 | { |
9af5c9c9 | 2050 | struct ata_port *ap = dev->link->ap; |
49016aca | 2051 | unsigned int class = *p_class; |
a0123703 | 2052 | struct ata_taskfile tf; |
49016aca TH |
2053 | unsigned int err_mask = 0; |
2054 | const char *reason; | |
54936f8b | 2055 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 2056 | int rc; |
1da177e4 | 2057 | |
0dd4b21f | 2058 | if (ata_msg_ctl(ap)) |
44877b4e | 2059 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 2060 | |
49016aca | 2061 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
49016aca | 2062 | retry: |
3373efd8 | 2063 | ata_tf_init(dev, &tf); |
a0123703 | 2064 | |
49016aca TH |
2065 | switch (class) { |
2066 | case ATA_DEV_ATA: | |
a0123703 | 2067 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
2068 | break; |
2069 | case ATA_DEV_ATAPI: | |
a0123703 | 2070 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
2071 | break; |
2072 | default: | |
2073 | rc = -ENODEV; | |
2074 | reason = "unsupported class"; | |
2075 | goto err_out; | |
1da177e4 LT |
2076 | } |
2077 | ||
a0123703 | 2078 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
2079 | |
2080 | /* Some devices choke if TF registers contain garbage. Make | |
2081 | * sure those are properly initialized. | |
2082 | */ | |
2083 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2084 | ||
2085 | /* Device presence detection is unreliable on some | |
2086 | * controllers. Always poll IDENTIFY if available. | |
2087 | */ | |
2088 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 2089 | |
3373efd8 | 2090 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
2b789108 | 2091 | id, sizeof(id[0]) * ATA_ID_WORDS, 0); |
a0123703 | 2092 | if (err_mask) { |
800b3996 | 2093 | if (err_mask & AC_ERR_NODEV_HINT) { |
55a8e2c8 | 2094 | DPRINTK("ata%u.%d: NODEV after polling detection\n", |
44877b4e | 2095 | ap->print_id, dev->devno); |
55a8e2c8 TH |
2096 | return -ENOENT; |
2097 | } | |
2098 | ||
54936f8b TH |
2099 | /* Device or controller might have reported the wrong |
2100 | * device class. Give a shot at the other IDENTIFY if | |
2101 | * the current one is aborted by the device. | |
2102 | */ | |
2103 | if (may_fallback && | |
2104 | (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { | |
2105 | may_fallback = 0; | |
2106 | ||
2107 | if (class == ATA_DEV_ATA) | |
2108 | class = ATA_DEV_ATAPI; | |
2109 | else | |
2110 | class = ATA_DEV_ATA; | |
2111 | goto retry; | |
2112 | } | |
2113 | ||
49016aca TH |
2114 | rc = -EIO; |
2115 | reason = "I/O error"; | |
1da177e4 LT |
2116 | goto err_out; |
2117 | } | |
2118 | ||
54936f8b TH |
2119 | /* Falling back doesn't make sense if ID data was read |
2120 | * successfully at least once. | |
2121 | */ | |
2122 | may_fallback = 0; | |
2123 | ||
49016aca | 2124 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 2125 | |
49016aca | 2126 | /* sanity check */ |
a4f5749b | 2127 | rc = -EINVAL; |
6070068b | 2128 | reason = "device reports invalid type"; |
a4f5749b TH |
2129 | |
2130 | if (class == ATA_DEV_ATA) { | |
2131 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
2132 | goto err_out; | |
2133 | } else { | |
2134 | if (ata_id_is_ata(id)) | |
2135 | goto err_out; | |
49016aca TH |
2136 | } |
2137 | ||
169439c2 ML |
2138 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
2139 | tried_spinup = 1; | |
2140 | /* | |
2141 | * Drive powered-up in standby mode, and requires a specific | |
2142 | * SET_FEATURES spin-up subcommand before it will accept | |
2143 | * anything other than the original IDENTIFY command. | |
2144 | */ | |
218f3d30 | 2145 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
fb0582f9 | 2146 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
2147 | rc = -EIO; |
2148 | reason = "SPINUP failed"; | |
2149 | goto err_out; | |
2150 | } | |
2151 | /* | |
2152 | * If the drive initially returned incomplete IDENTIFY info, | |
2153 | * we now must reissue the IDENTIFY command. | |
2154 | */ | |
2155 | if (id[2] == 0x37c8) | |
2156 | goto retry; | |
2157 | } | |
2158 | ||
bff04647 | 2159 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
2160 | /* |
2161 | * The exact sequence expected by certain pre-ATA4 drives is: | |
2162 | * SRST RESET | |
50a99018 AC |
2163 | * IDENTIFY (optional in early ATA) |
2164 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
2165 | * anything else.. |
2166 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
2167 | * |
2168 | * Note that ATA4 says lba is mandatory so the second check | |
2169 | * shoud never trigger. | |
49016aca TH |
2170 | */ |
2171 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 2172 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
2173 | if (err_mask) { |
2174 | rc = -EIO; | |
2175 | reason = "INIT_DEV_PARAMS failed"; | |
2176 | goto err_out; | |
2177 | } | |
2178 | ||
2179 | /* current CHS translation info (id[53-58]) might be | |
2180 | * changed. reread the identify device info. | |
2181 | */ | |
bff04647 | 2182 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
2183 | goto retry; |
2184 | } | |
2185 | } | |
2186 | ||
2187 | *p_class = class; | |
fe635c7e | 2188 | |
49016aca TH |
2189 | return 0; |
2190 | ||
2191 | err_out: | |
88574551 | 2192 | if (ata_msg_warn(ap)) |
0dd4b21f | 2193 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 2194 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
2195 | return rc; |
2196 | } | |
2197 | ||
3373efd8 | 2198 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 2199 | { |
9af5c9c9 TH |
2200 | struct ata_port *ap = dev->link->ap; |
2201 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
4b2f3ede TH |
2202 | } |
2203 | ||
a6e6ce8e TH |
2204 | static void ata_dev_config_ncq(struct ata_device *dev, |
2205 | char *desc, size_t desc_sz) | |
2206 | { | |
9af5c9c9 | 2207 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e TH |
2208 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
2209 | ||
2210 | if (!ata_id_has_ncq(dev->id)) { | |
2211 | desc[0] = '\0'; | |
2212 | return; | |
2213 | } | |
75683fe7 | 2214 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 AC |
2215 | snprintf(desc, desc_sz, "NCQ (not used)"); |
2216 | return; | |
2217 | } | |
a6e6ce8e | 2218 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 2219 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
2220 | dev->flags |= ATA_DFLAG_NCQ; |
2221 | } | |
2222 | ||
2223 | if (hdepth >= ddepth) | |
2224 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
2225 | else | |
2226 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
2227 | } | |
2228 | ||
49016aca | 2229 | /** |
ffeae418 | 2230 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
2231 | * @dev: Target device to configure |
2232 | * | |
2233 | * Configure @dev according to @dev->id. Generic and low-level | |
2234 | * driver specific fixups are also applied. | |
49016aca TH |
2235 | * |
2236 | * LOCKING: | |
ffeae418 TH |
2237 | * Kernel thread context (may sleep) |
2238 | * | |
2239 | * RETURNS: | |
2240 | * 0 on success, -errno otherwise | |
49016aca | 2241 | */ |
efdaedc4 | 2242 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 2243 | { |
9af5c9c9 TH |
2244 | struct ata_port *ap = dev->link->ap; |
2245 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 2246 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 2247 | const u16 *id = dev->id; |
7dc951ae | 2248 | unsigned long xfer_mask; |
b352e57d | 2249 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
2250 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
2251 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 2252 | int rc; |
49016aca | 2253 | |
0dd4b21f | 2254 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e TH |
2255 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
2256 | __FUNCTION__); | |
ffeae418 | 2257 | return 0; |
49016aca TH |
2258 | } |
2259 | ||
0dd4b21f | 2260 | if (ata_msg_probe(ap)) |
44877b4e | 2261 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __FUNCTION__); |
1da177e4 | 2262 | |
75683fe7 TH |
2263 | /* set horkage */ |
2264 | dev->horkage |= ata_dev_blacklisted(dev); | |
33267325 | 2265 | ata_force_horkage(dev); |
75683fe7 | 2266 | |
6746544c TH |
2267 | /* let ACPI work its magic */ |
2268 | rc = ata_acpi_on_devcfg(dev); | |
2269 | if (rc) | |
2270 | return rc; | |
08573a86 | 2271 | |
05027adc TH |
2272 | /* massage HPA, do it early as it might change IDENTIFY data */ |
2273 | rc = ata_hpa_resize(dev); | |
2274 | if (rc) | |
2275 | return rc; | |
2276 | ||
c39f5ebe | 2277 | /* print device capabilities */ |
0dd4b21f | 2278 | if (ata_msg_probe(ap)) |
88574551 TH |
2279 | ata_dev_printk(dev, KERN_DEBUG, |
2280 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
2281 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
0dd4b21f | 2282 | __FUNCTION__, |
f15a1daf TH |
2283 | id[49], id[82], id[83], id[84], |
2284 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 2285 | |
208a9933 | 2286 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 2287 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
2288 | dev->max_sectors = 0; |
2289 | dev->cdb_len = 0; | |
2290 | dev->n_sectors = 0; | |
2291 | dev->cylinders = 0; | |
2292 | dev->heads = 0; | |
2293 | dev->sectors = 0; | |
2294 | ||
1da177e4 LT |
2295 | /* |
2296 | * common ATA, ATAPI feature tests | |
2297 | */ | |
2298 | ||
ff8854b2 | 2299 | /* find max transfer mode; for printk only */ |
1148c3a7 | 2300 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 2301 | |
0dd4b21f BP |
2302 | if (ata_msg_probe(ap)) |
2303 | ata_dump_id(id); | |
1da177e4 | 2304 | |
ef143d57 AL |
2305 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
2306 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
2307 | sizeof(fwrevbuf)); | |
2308 | ||
2309 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
2310 | sizeof(modelbuf)); | |
2311 | ||
1da177e4 LT |
2312 | /* ATA-specific feature tests */ |
2313 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d AC |
2314 | if (ata_id_is_cfa(id)) { |
2315 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
44877b4e TH |
2316 | ata_dev_printk(dev, KERN_WARNING, |
2317 | "supports DRM functions and may " | |
2318 | "not be fully accessable.\n"); | |
b352e57d | 2319 | snprintf(revbuf, 7, "CFA"); |
ae8d4ee7 | 2320 | } else { |
2dcb407e | 2321 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
ae8d4ee7 AC |
2322 | /* Warn the user if the device has TPM extensions */ |
2323 | if (ata_id_has_tpm(id)) | |
2324 | ata_dev_printk(dev, KERN_WARNING, | |
2325 | "supports DRM functions and may " | |
2326 | "not be fully accessable.\n"); | |
2327 | } | |
b352e57d | 2328 | |
1148c3a7 | 2329 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 2330 | |
3f64f565 EM |
2331 | if (dev->id[59] & 0x100) |
2332 | dev->multi_count = dev->id[59] & 0xff; | |
2333 | ||
1148c3a7 | 2334 | if (ata_id_has_lba(id)) { |
4c2d721a | 2335 | const char *lba_desc; |
a6e6ce8e | 2336 | char ncq_desc[20]; |
8bf62ece | 2337 | |
4c2d721a TH |
2338 | lba_desc = "LBA"; |
2339 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 2340 | if (ata_id_has_lba48(id)) { |
8bf62ece | 2341 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 2342 | lba_desc = "LBA48"; |
6fc49adb TH |
2343 | |
2344 | if (dev->n_sectors >= (1UL << 28) && | |
2345 | ata_id_has_flush_ext(id)) | |
2346 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 2347 | } |
8bf62ece | 2348 | |
a6e6ce8e TH |
2349 | /* config NCQ */ |
2350 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
2351 | ||
8bf62ece | 2352 | /* print device info to dmesg */ |
3f64f565 EM |
2353 | if (ata_msg_drv(ap) && print_info) { |
2354 | ata_dev_printk(dev, KERN_INFO, | |
2355 | "%s: %s, %s, max %s\n", | |
2356 | revbuf, modelbuf, fwrevbuf, | |
2357 | ata_mode_string(xfer_mask)); | |
2358 | ata_dev_printk(dev, KERN_INFO, | |
2359 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 2360 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2361 | dev->multi_count, lba_desc, ncq_desc); |
2362 | } | |
ffeae418 | 2363 | } else { |
8bf62ece AL |
2364 | /* CHS */ |
2365 | ||
2366 | /* Default translation */ | |
1148c3a7 TH |
2367 | dev->cylinders = id[1]; |
2368 | dev->heads = id[3]; | |
2369 | dev->sectors = id[6]; | |
8bf62ece | 2370 | |
1148c3a7 | 2371 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2372 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2373 | dev->cylinders = id[54]; |
2374 | dev->heads = id[55]; | |
2375 | dev->sectors = id[56]; | |
8bf62ece AL |
2376 | } |
2377 | ||
2378 | /* print device info to dmesg */ | |
3f64f565 | 2379 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 2380 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2381 | "%s: %s, %s, max %s\n", |
2382 | revbuf, modelbuf, fwrevbuf, | |
2383 | ata_mode_string(xfer_mask)); | |
a84471fe | 2384 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2385 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
2386 | (unsigned long long)dev->n_sectors, | |
2387 | dev->multi_count, dev->cylinders, | |
2388 | dev->heads, dev->sectors); | |
2389 | } | |
07f6f7d0 AL |
2390 | } |
2391 | ||
6e7846e9 | 2392 | dev->cdb_len = 16; |
1da177e4 LT |
2393 | } |
2394 | ||
2395 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2396 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2397 | const char *cdb_intr_string = ""; |
2398 | const char *atapi_an_string = ""; | |
91163006 | 2399 | const char *dma_dir_string = ""; |
7d77b247 | 2400 | u32 sntf; |
08a556db | 2401 | |
1148c3a7 | 2402 | rc = atapi_cdb_len(id); |
1da177e4 | 2403 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2404 | if (ata_msg_warn(ap)) |
88574551 TH |
2405 | ata_dev_printk(dev, KERN_WARNING, |
2406 | "unsupported CDB len\n"); | |
ffeae418 | 2407 | rc = -EINVAL; |
1da177e4 LT |
2408 | goto err_out_nosup; |
2409 | } | |
6e7846e9 | 2410 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2411 | |
7d77b247 TH |
2412 | /* Enable ATAPI AN if both the host and device have |
2413 | * the support. If PMP is attached, SNTF is required | |
2414 | * to enable ATAPI AN to discern between PHY status | |
2415 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2416 | */ |
7d77b247 TH |
2417 | if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
2418 | (!ap->nr_pmp_links || | |
2419 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { | |
854c73a2 TH |
2420 | unsigned int err_mask; |
2421 | ||
9f45cbd3 | 2422 | /* issue SET feature command to turn this on */ |
218f3d30 JG |
2423 | err_mask = ata_dev_set_feature(dev, |
2424 | SETFEATURES_SATA_ENABLE, SATA_AN); | |
854c73a2 | 2425 | if (err_mask) |
9f45cbd3 | 2426 | ata_dev_printk(dev, KERN_ERR, |
854c73a2 TH |
2427 | "failed to enable ATAPI AN " |
2428 | "(err_mask=0x%x)\n", err_mask); | |
2429 | else { | |
9f45cbd3 | 2430 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2431 | atapi_an_string = ", ATAPI AN"; |
2432 | } | |
9f45cbd3 KCA |
2433 | } |
2434 | ||
08a556db | 2435 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2436 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2437 | cdb_intr_string = ", CDB intr"; |
2438 | } | |
312f7da2 | 2439 | |
91163006 TH |
2440 | if (atapi_dmadir || atapi_id_dmadir(dev->id)) { |
2441 | dev->flags |= ATA_DFLAG_DMADIR; | |
2442 | dma_dir_string = ", DMADIR"; | |
2443 | } | |
2444 | ||
1da177e4 | 2445 | /* print device info to dmesg */ |
5afc8142 | 2446 | if (ata_msg_drv(ap) && print_info) |
ef143d57 | 2447 | ata_dev_printk(dev, KERN_INFO, |
91163006 | 2448 | "ATAPI: %s, %s, max %s%s%s%s\n", |
ef143d57 | 2449 | modelbuf, fwrevbuf, |
12436c30 | 2450 | ata_mode_string(xfer_mask), |
91163006 TH |
2451 | cdb_intr_string, atapi_an_string, |
2452 | dma_dir_string); | |
1da177e4 LT |
2453 | } |
2454 | ||
914ed354 TH |
2455 | /* determine max_sectors */ |
2456 | dev->max_sectors = ATA_MAX_SECTORS; | |
2457 | if (dev->flags & ATA_DFLAG_LBA48) | |
2458 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2459 | ||
ca77329f KCA |
2460 | if (!(dev->horkage & ATA_HORKAGE_IPM)) { |
2461 | if (ata_id_has_hipm(dev->id)) | |
2462 | dev->flags |= ATA_DFLAG_HIPM; | |
2463 | if (ata_id_has_dipm(dev->id)) | |
2464 | dev->flags |= ATA_DFLAG_DIPM; | |
2465 | } | |
2466 | ||
c5038fc0 AC |
2467 | /* Limit PATA drive on SATA cable bridge transfers to udma5, |
2468 | 200 sectors */ | |
3373efd8 | 2469 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2470 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
2471 | ata_dev_printk(dev, KERN_INFO, |
2472 | "applying bridge limits\n"); | |
5a529139 | 2473 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2474 | dev->max_sectors = ATA_MAX_SECTORS; |
2475 | } | |
2476 | ||
f8d8e579 | 2477 | if ((dev->class == ATA_DEV_ATAPI) && |
f442cd86 | 2478 | (atapi_command_packet_set(id) == TYPE_TAPE)) { |
f8d8e579 | 2479 | dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
f442cd86 AL |
2480 | dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
2481 | } | |
f8d8e579 | 2482 | |
75683fe7 | 2483 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2484 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2485 | dev->max_sectors); | |
18d6e9d5 | 2486 | |
ca77329f KCA |
2487 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { |
2488 | dev->horkage |= ATA_HORKAGE_IPM; | |
2489 | ||
2490 | /* reset link pm_policy for this port to no pm */ | |
2491 | ap->pm_policy = MAX_PERFORMANCE; | |
2492 | } | |
2493 | ||
4b2f3ede | 2494 | if (ap->ops->dev_config) |
cd0d3bbc | 2495 | ap->ops->dev_config(dev); |
4b2f3ede | 2496 | |
c5038fc0 AC |
2497 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2498 | /* Let the user know. We don't want to disallow opens for | |
2499 | rescue purposes, or in case the vendor is just a blithering | |
2500 | idiot. Do this after the dev_config call as some controllers | |
2501 | with buggy firmware may want to avoid reporting false device | |
2502 | bugs */ | |
2503 | ||
2504 | if (print_info) { | |
2505 | ata_dev_printk(dev, KERN_WARNING, | |
2506 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2507 | ata_dev_printk(dev, KERN_WARNING, | |
2508 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2509 | } | |
2510 | } | |
2511 | ||
0dd4b21f BP |
2512 | if (ata_msg_probe(ap)) |
2513 | ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", | |
2514 | __FUNCTION__, ata_chk_status(ap)); | |
ffeae418 | 2515 | return 0; |
1da177e4 LT |
2516 | |
2517 | err_out_nosup: | |
0dd4b21f | 2518 | if (ata_msg_probe(ap)) |
88574551 TH |
2519 | ata_dev_printk(dev, KERN_DEBUG, |
2520 | "%s: EXIT, err\n", __FUNCTION__); | |
ffeae418 | 2521 | return rc; |
1da177e4 LT |
2522 | } |
2523 | ||
be0d18df | 2524 | /** |
2e41e8e6 | 2525 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2526 | * @ap: port |
2527 | * | |
2e41e8e6 | 2528 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2529 | * detection. |
2530 | */ | |
2531 | ||
2532 | int ata_cable_40wire(struct ata_port *ap) | |
2533 | { | |
2534 | return ATA_CBL_PATA40; | |
2535 | } | |
2536 | ||
2537 | /** | |
2e41e8e6 | 2538 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2539 | * @ap: port |
2540 | * | |
2e41e8e6 | 2541 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2542 | * detection. |
2543 | */ | |
2544 | ||
2545 | int ata_cable_80wire(struct ata_port *ap) | |
2546 | { | |
2547 | return ATA_CBL_PATA80; | |
2548 | } | |
2549 | ||
2550 | /** | |
2551 | * ata_cable_unknown - return unknown PATA cable. | |
2552 | * @ap: port | |
2553 | * | |
2554 | * Helper method for drivers which have no PATA cable detection. | |
2555 | */ | |
2556 | ||
2557 | int ata_cable_unknown(struct ata_port *ap) | |
2558 | { | |
2559 | return ATA_CBL_PATA_UNK; | |
2560 | } | |
2561 | ||
c88f90c3 TH |
2562 | /** |
2563 | * ata_cable_ignore - return ignored PATA cable. | |
2564 | * @ap: port | |
2565 | * | |
2566 | * Helper method for drivers which don't use cable type to limit | |
2567 | * transfer mode. | |
2568 | */ | |
2569 | int ata_cable_ignore(struct ata_port *ap) | |
2570 | { | |
2571 | return ATA_CBL_PATA_IGN; | |
2572 | } | |
2573 | ||
be0d18df AC |
2574 | /** |
2575 | * ata_cable_sata - return SATA cable type | |
2576 | * @ap: port | |
2577 | * | |
2578 | * Helper method for drivers which have SATA cables | |
2579 | */ | |
2580 | ||
2581 | int ata_cable_sata(struct ata_port *ap) | |
2582 | { | |
2583 | return ATA_CBL_SATA; | |
2584 | } | |
2585 | ||
1da177e4 LT |
2586 | /** |
2587 | * ata_bus_probe - Reset and probe ATA bus | |
2588 | * @ap: Bus to probe | |
2589 | * | |
0cba632b JG |
2590 | * Master ATA bus probing function. Initiates a hardware-dependent |
2591 | * bus reset, then attempts to identify any devices found on | |
2592 | * the bus. | |
2593 | * | |
1da177e4 | 2594 | * LOCKING: |
0cba632b | 2595 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2596 | * |
2597 | * RETURNS: | |
96072e69 | 2598 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2599 | */ |
2600 | ||
80289167 | 2601 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2602 | { |
28ca5c57 | 2603 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2604 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2605 | int rc; |
e82cbdb9 | 2606 | struct ata_device *dev; |
1da177e4 | 2607 | |
28ca5c57 | 2608 | ata_port_probe(ap); |
c19ba8af | 2609 | |
f58229f8 TH |
2610 | ata_link_for_each_dev(dev, &ap->link) |
2611 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; | |
14d2bac1 TH |
2612 | |
2613 | retry: | |
cdeab114 TH |
2614 | ata_link_for_each_dev(dev, &ap->link) { |
2615 | /* If we issue an SRST then an ATA drive (not ATAPI) | |
2616 | * may change configuration and be in PIO0 timing. If | |
2617 | * we do a hard reset (or are coming from power on) | |
2618 | * this is true for ATA or ATAPI. Until we've set a | |
2619 | * suitable controller mode we should not touch the | |
2620 | * bus as we may be talking too fast. | |
2621 | */ | |
2622 | dev->pio_mode = XFER_PIO_0; | |
2623 | ||
2624 | /* If the controller has a pio mode setup function | |
2625 | * then use it to set the chipset to rights. Don't | |
2626 | * touch the DMA setup as that will be dealt with when | |
2627 | * configuring devices. | |
2628 | */ | |
2629 | if (ap->ops->set_piomode) | |
2630 | ap->ops->set_piomode(ap, dev); | |
2631 | } | |
2632 | ||
2044470c | 2633 | /* reset and determine device classes */ |
52783c5d | 2634 | ap->ops->phy_reset(ap); |
2061a47a | 2635 | |
f58229f8 | 2636 | ata_link_for_each_dev(dev, &ap->link) { |
52783c5d TH |
2637 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
2638 | dev->class != ATA_DEV_UNKNOWN) | |
2639 | classes[dev->devno] = dev->class; | |
2640 | else | |
2641 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2642 | |
52783c5d | 2643 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2644 | } |
1da177e4 | 2645 | |
52783c5d | 2646 | ata_port_probe(ap); |
2044470c | 2647 | |
f31f0cc2 JG |
2648 | /* read IDENTIFY page and configure devices. We have to do the identify |
2649 | specific sequence bass-ackwards so that PDIAG- is released by | |
2650 | the slave device */ | |
2651 | ||
f58229f8 TH |
2652 | ata_link_for_each_dev(dev, &ap->link) { |
2653 | if (tries[dev->devno]) | |
2654 | dev->class = classes[dev->devno]; | |
ffeae418 | 2655 | |
14d2bac1 | 2656 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2657 | continue; |
ffeae418 | 2658 | |
bff04647 TH |
2659 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2660 | dev->id); | |
14d2bac1 TH |
2661 | if (rc) |
2662 | goto fail; | |
f31f0cc2 JG |
2663 | } |
2664 | ||
be0d18df AC |
2665 | /* Now ask for the cable type as PDIAG- should have been released */ |
2666 | if (ap->ops->cable_detect) | |
2667 | ap->cbl = ap->ops->cable_detect(ap); | |
2668 | ||
614fe29b AC |
2669 | /* We may have SATA bridge glue hiding here irrespective of the |
2670 | reported cable types and sensed types */ | |
2671 | ata_link_for_each_dev(dev, &ap->link) { | |
2672 | if (!ata_dev_enabled(dev)) | |
2673 | continue; | |
2674 | /* SATA drives indicate we have a bridge. We don't know which | |
2675 | end of the link the bridge is which is a problem */ | |
2676 | if (ata_id_is_sata(dev->id)) | |
2677 | ap->cbl = ATA_CBL_SATA; | |
2678 | } | |
2679 | ||
f31f0cc2 JG |
2680 | /* After the identify sequence we can now set up the devices. We do |
2681 | this in the normal order so that the user doesn't get confused */ | |
2682 | ||
f58229f8 | 2683 | ata_link_for_each_dev(dev, &ap->link) { |
f31f0cc2 JG |
2684 | if (!ata_dev_enabled(dev)) |
2685 | continue; | |
14d2bac1 | 2686 | |
9af5c9c9 | 2687 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2688 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2689 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2690 | if (rc) |
2691 | goto fail; | |
1da177e4 LT |
2692 | } |
2693 | ||
e82cbdb9 | 2694 | /* configure transfer mode */ |
0260731f | 2695 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2696 | if (rc) |
51713d35 | 2697 | goto fail; |
1da177e4 | 2698 | |
f58229f8 TH |
2699 | ata_link_for_each_dev(dev, &ap->link) |
2700 | if (ata_dev_enabled(dev)) | |
e82cbdb9 | 2701 | return 0; |
1da177e4 | 2702 | |
e82cbdb9 TH |
2703 | /* no device present, disable port */ |
2704 | ata_port_disable(ap); | |
96072e69 | 2705 | return -ENODEV; |
14d2bac1 TH |
2706 | |
2707 | fail: | |
4ae72a1e TH |
2708 | tries[dev->devno]--; |
2709 | ||
14d2bac1 TH |
2710 | switch (rc) { |
2711 | case -EINVAL: | |
4ae72a1e | 2712 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2713 | tries[dev->devno] = 0; |
2714 | break; | |
4ae72a1e TH |
2715 | |
2716 | case -ENODEV: | |
2717 | /* give it just one more chance */ | |
2718 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2719 | case -EIO: |
4ae72a1e TH |
2720 | if (tries[dev->devno] == 1) { |
2721 | /* This is the last chance, better to slow | |
2722 | * down than lose it. | |
2723 | */ | |
936fd732 | 2724 | sata_down_spd_limit(&ap->link); |
4ae72a1e TH |
2725 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2726 | } | |
14d2bac1 TH |
2727 | } |
2728 | ||
4ae72a1e | 2729 | if (!tries[dev->devno]) |
3373efd8 | 2730 | ata_dev_disable(dev); |
ec573755 | 2731 | |
14d2bac1 | 2732 | goto retry; |
1da177e4 LT |
2733 | } |
2734 | ||
2735 | /** | |
0cba632b JG |
2736 | * ata_port_probe - Mark port as enabled |
2737 | * @ap: Port for which we indicate enablement | |
1da177e4 | 2738 | * |
0cba632b JG |
2739 | * Modify @ap data structure such that the system |
2740 | * thinks that the entire port is enabled. | |
2741 | * | |
cca3974e | 2742 | * LOCKING: host lock, or some other form of |
0cba632b | 2743 | * serialization. |
1da177e4 LT |
2744 | */ |
2745 | ||
2746 | void ata_port_probe(struct ata_port *ap) | |
2747 | { | |
198e0fed | 2748 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2749 | } |
2750 | ||
3be680b7 TH |
2751 | /** |
2752 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2753 | * @link: SATA link to printk link status about |
3be680b7 TH |
2754 | * |
2755 | * This function prints link speed and status of a SATA link. | |
2756 | * | |
2757 | * LOCKING: | |
2758 | * None. | |
2759 | */ | |
936fd732 | 2760 | void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2761 | { |
6d5f9732 | 2762 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2763 | |
936fd732 | 2764 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2765 | return; |
936fd732 | 2766 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2767 | |
936fd732 | 2768 | if (ata_link_online(link)) { |
3be680b7 | 2769 | tmp = (sstatus >> 4) & 0xf; |
936fd732 | 2770 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2771 | "SATA link up %s (SStatus %X SControl %X)\n", |
2772 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2773 | } else { |
936fd732 | 2774 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2775 | "SATA link down (SStatus %X SControl %X)\n", |
2776 | sstatus, scontrol); | |
3be680b7 TH |
2777 | } |
2778 | } | |
2779 | ||
ebdfca6e AC |
2780 | /** |
2781 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2782 | * @adev: device |
2783 | * | |
2784 | * Obtain the other device on the same cable, or if none is | |
2785 | * present NULL is returned | |
2786 | */ | |
2e9edbf8 | 2787 | |
3373efd8 | 2788 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2789 | { |
9af5c9c9 TH |
2790 | struct ata_link *link = adev->link; |
2791 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2792 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2793 | return NULL; |
2794 | return pair; | |
2795 | } | |
2796 | ||
1da177e4 | 2797 | /** |
780a87f7 JG |
2798 | * ata_port_disable - Disable port. |
2799 | * @ap: Port to be disabled. | |
1da177e4 | 2800 | * |
780a87f7 JG |
2801 | * Modify @ap data structure such that the system |
2802 | * thinks that the entire port is disabled, and should | |
2803 | * never attempt to probe or communicate with devices | |
2804 | * on this port. | |
2805 | * | |
cca3974e | 2806 | * LOCKING: host lock, or some other form of |
780a87f7 | 2807 | * serialization. |
1da177e4 LT |
2808 | */ |
2809 | ||
2810 | void ata_port_disable(struct ata_port *ap) | |
2811 | { | |
9af5c9c9 TH |
2812 | ap->link.device[0].class = ATA_DEV_NONE; |
2813 | ap->link.device[1].class = ATA_DEV_NONE; | |
198e0fed | 2814 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2815 | } |
2816 | ||
1c3fae4d | 2817 | /** |
3c567b7d | 2818 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2819 | * @link: Link to adjust SATA spd limit for |
1c3fae4d | 2820 | * |
936fd732 | 2821 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2822 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2823 | * using sata_set_spd(). |
1c3fae4d TH |
2824 | * |
2825 | * LOCKING: | |
2826 | * Inherited from caller. | |
2827 | * | |
2828 | * RETURNS: | |
2829 | * 0 on success, negative errno on failure | |
2830 | */ | |
936fd732 | 2831 | int sata_down_spd_limit(struct ata_link *link) |
1c3fae4d | 2832 | { |
81952c54 TH |
2833 | u32 sstatus, spd, mask; |
2834 | int rc, highbit; | |
1c3fae4d | 2835 | |
936fd732 | 2836 | if (!sata_scr_valid(link)) |
008a7896 TH |
2837 | return -EOPNOTSUPP; |
2838 | ||
2839 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 2840 | * If not, use cached value in link->sata_spd. |
008a7896 | 2841 | */ |
936fd732 | 2842 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
008a7896 TH |
2843 | if (rc == 0) |
2844 | spd = (sstatus >> 4) & 0xf; | |
2845 | else | |
936fd732 | 2846 | spd = link->sata_spd; |
1c3fae4d | 2847 | |
936fd732 | 2848 | mask = link->sata_spd_limit; |
1c3fae4d TH |
2849 | if (mask <= 1) |
2850 | return -EINVAL; | |
008a7896 TH |
2851 | |
2852 | /* unconditionally mask off the highest bit */ | |
1c3fae4d TH |
2853 | highbit = fls(mask) - 1; |
2854 | mask &= ~(1 << highbit); | |
2855 | ||
008a7896 TH |
2856 | /* Mask off all speeds higher than or equal to the current |
2857 | * one. Force 1.5Gbps if current SPD is not available. | |
2858 | */ | |
2859 | if (spd > 1) | |
2860 | mask &= (1 << (spd - 1)) - 1; | |
2861 | else | |
2862 | mask &= 1; | |
2863 | ||
2864 | /* were we already at the bottom? */ | |
1c3fae4d TH |
2865 | if (!mask) |
2866 | return -EINVAL; | |
2867 | ||
936fd732 | 2868 | link->sata_spd_limit = mask; |
1c3fae4d | 2869 | |
936fd732 | 2870 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
f15a1daf | 2871 | sata_spd_string(fls(mask))); |
1c3fae4d TH |
2872 | |
2873 | return 0; | |
2874 | } | |
2875 | ||
936fd732 | 2876 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d | 2877 | { |
5270222f TH |
2878 | struct ata_link *host_link = &link->ap->link; |
2879 | u32 limit, target, spd; | |
1c3fae4d | 2880 | |
5270222f TH |
2881 | limit = link->sata_spd_limit; |
2882 | ||
2883 | /* Don't configure downstream link faster than upstream link. | |
2884 | * It doesn't speed up anything and some PMPs choke on such | |
2885 | * configuration. | |
2886 | */ | |
2887 | if (!ata_is_host_link(link) && host_link->sata_spd) | |
2888 | limit &= (1 << host_link->sata_spd) - 1; | |
2889 | ||
2890 | if (limit == UINT_MAX) | |
2891 | target = 0; | |
1c3fae4d | 2892 | else |
5270222f | 2893 | target = fls(limit); |
1c3fae4d TH |
2894 | |
2895 | spd = (*scontrol >> 4) & 0xf; | |
5270222f | 2896 | *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
1c3fae4d | 2897 | |
5270222f | 2898 | return spd != target; |
1c3fae4d TH |
2899 | } |
2900 | ||
2901 | /** | |
3c567b7d | 2902 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 2903 | * @link: Link in question |
1c3fae4d TH |
2904 | * |
2905 | * Test whether the spd limit in SControl matches | |
936fd732 | 2906 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
2907 | * whether hardreset is necessary to apply SATA spd |
2908 | * configuration. | |
2909 | * | |
2910 | * LOCKING: | |
2911 | * Inherited from caller. | |
2912 | * | |
2913 | * RETURNS: | |
2914 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2915 | */ | |
936fd732 | 2916 | int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
2917 | { |
2918 | u32 scontrol; | |
2919 | ||
936fd732 | 2920 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
db64bcf3 | 2921 | return 1; |
1c3fae4d | 2922 | |
936fd732 | 2923 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
2924 | } |
2925 | ||
2926 | /** | |
3c567b7d | 2927 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 2928 | * @link: Link to set SATA spd for |
1c3fae4d | 2929 | * |
936fd732 | 2930 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
2931 | * |
2932 | * LOCKING: | |
2933 | * Inherited from caller. | |
2934 | * | |
2935 | * RETURNS: | |
2936 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2937 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2938 | */ |
936fd732 | 2939 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
2940 | { |
2941 | u32 scontrol; | |
81952c54 | 2942 | int rc; |
1c3fae4d | 2943 | |
936fd732 | 2944 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 2945 | return rc; |
1c3fae4d | 2946 | |
936fd732 | 2947 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
2948 | return 0; |
2949 | ||
936fd732 | 2950 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
2951 | return rc; |
2952 | ||
1c3fae4d TH |
2953 | return 1; |
2954 | } | |
2955 | ||
452503f9 AC |
2956 | /* |
2957 | * This mode timing computation functionality is ported over from | |
2958 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2959 | */ | |
2960 | /* | |
b352e57d | 2961 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2962 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2963 | * for UDMA6, which is currently supported only by Maxtor drives. |
2964 | * | |
2965 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2966 | */ |
2967 | ||
2968 | static const struct ata_timing ata_timing[] = { | |
70cd071e TH |
2969 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ |
2970 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
2971 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
2972 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
2973 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
2974 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
2975 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
2976 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, | |
452503f9 | 2977 | |
70cd071e TH |
2978 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, |
2979 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
2980 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, | |
452503f9 | 2981 | |
70cd071e TH |
2982 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, |
2983 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
2984 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, | |
b352e57d | 2985 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, |
70cd071e | 2986 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
452503f9 AC |
2987 | |
2988 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
70cd071e TH |
2989 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
2990 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2991 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
2992 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2993 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2994 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2995 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
452503f9 AC |
2996 | |
2997 | { 0xFF } | |
2998 | }; | |
2999 | ||
2dcb407e JG |
3000 | #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
3001 | #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) | |
452503f9 AC |
3002 | |
3003 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
3004 | { | |
3005 | q->setup = EZ(t->setup * 1000, T); | |
3006 | q->act8b = EZ(t->act8b * 1000, T); | |
3007 | q->rec8b = EZ(t->rec8b * 1000, T); | |
3008 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
3009 | q->active = EZ(t->active * 1000, T); | |
3010 | q->recover = EZ(t->recover * 1000, T); | |
3011 | q->cycle = EZ(t->cycle * 1000, T); | |
3012 | q->udma = EZ(t->udma * 1000, UT); | |
3013 | } | |
3014 | ||
3015 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
3016 | struct ata_timing *m, unsigned int what) | |
3017 | { | |
3018 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
3019 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
3020 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
3021 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
3022 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
3023 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
3024 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
3025 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
3026 | } | |
3027 | ||
6357357c | 3028 | const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
452503f9 | 3029 | { |
70cd071e TH |
3030 | const struct ata_timing *t = ata_timing; |
3031 | ||
3032 | while (xfer_mode > t->mode) | |
3033 | t++; | |
452503f9 | 3034 | |
70cd071e TH |
3035 | if (xfer_mode == t->mode) |
3036 | return t; | |
3037 | return NULL; | |
452503f9 AC |
3038 | } |
3039 | ||
3040 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
3041 | struct ata_timing *t, int T, int UT) | |
3042 | { | |
3043 | const struct ata_timing *s; | |
3044 | struct ata_timing p; | |
3045 | ||
3046 | /* | |
2e9edbf8 | 3047 | * Find the mode. |
75b1f2f8 | 3048 | */ |
452503f9 AC |
3049 | |
3050 | if (!(s = ata_timing_find_mode(speed))) | |
3051 | return -EINVAL; | |
3052 | ||
75b1f2f8 AL |
3053 | memcpy(t, s, sizeof(*s)); |
3054 | ||
452503f9 AC |
3055 | /* |
3056 | * If the drive is an EIDE drive, it can tell us it needs extended | |
3057 | * PIO/MW_DMA cycle timing. | |
3058 | */ | |
3059 | ||
3060 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
3061 | memset(&p, 0, sizeof(p)); | |
2dcb407e | 3062 | if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
452503f9 AC |
3063 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
3064 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2dcb407e | 3065 | } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
452503f9 AC |
3066 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
3067 | } | |
3068 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
3069 | } | |
3070 | ||
3071 | /* | |
3072 | * Convert the timing to bus clock counts. | |
3073 | */ | |
3074 | ||
75b1f2f8 | 3075 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
3076 | |
3077 | /* | |
c893a3ae RD |
3078 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
3079 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
3080 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
3081 | */ |
3082 | ||
fd3367af | 3083 | if (speed > XFER_PIO_6) { |
452503f9 AC |
3084 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
3085 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
3086 | } | |
3087 | ||
3088 | /* | |
c893a3ae | 3089 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
3090 | */ |
3091 | ||
3092 | if (t->act8b + t->rec8b < t->cyc8b) { | |
3093 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
3094 | t->rec8b = t->cyc8b - t->act8b; | |
3095 | } | |
3096 | ||
3097 | if (t->active + t->recover < t->cycle) { | |
3098 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
3099 | t->recover = t->cycle - t->active; | |
3100 | } | |
a617c09f | 3101 | |
4f701d1e AC |
3102 | /* In a few cases quantisation may produce enough errors to |
3103 | leave t->cycle too low for the sum of active and recovery | |
3104 | if so we must correct this */ | |
3105 | if (t->active + t->recover > t->cycle) | |
3106 | t->cycle = t->active + t->recover; | |
452503f9 AC |
3107 | |
3108 | return 0; | |
3109 | } | |
3110 | ||
a0f79b92 TH |
3111 | /** |
3112 | * ata_timing_cycle2mode - find xfer mode for the specified cycle duration | |
3113 | * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. | |
3114 | * @cycle: cycle duration in ns | |
3115 | * | |
3116 | * Return matching xfer mode for @cycle. The returned mode is of | |
3117 | * the transfer type specified by @xfer_shift. If @cycle is too | |
3118 | * slow for @xfer_shift, 0xff is returned. If @cycle is faster | |
3119 | * than the fastest known mode, the fasted mode is returned. | |
3120 | * | |
3121 | * LOCKING: | |
3122 | * None. | |
3123 | * | |
3124 | * RETURNS: | |
3125 | * Matching xfer_mode, 0xff if no match found. | |
3126 | */ | |
3127 | u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) | |
3128 | { | |
3129 | u8 base_mode = 0xff, last_mode = 0xff; | |
3130 | const struct ata_xfer_ent *ent; | |
3131 | const struct ata_timing *t; | |
3132 | ||
3133 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
3134 | if (ent->shift == xfer_shift) | |
3135 | base_mode = ent->base; | |
3136 | ||
3137 | for (t = ata_timing_find_mode(base_mode); | |
3138 | t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { | |
3139 | unsigned short this_cycle; | |
3140 | ||
3141 | switch (xfer_shift) { | |
3142 | case ATA_SHIFT_PIO: | |
3143 | case ATA_SHIFT_MWDMA: | |
3144 | this_cycle = t->cycle; | |
3145 | break; | |
3146 | case ATA_SHIFT_UDMA: | |
3147 | this_cycle = t->udma; | |
3148 | break; | |
3149 | default: | |
3150 | return 0xff; | |
3151 | } | |
3152 | ||
3153 | if (cycle > this_cycle) | |
3154 | break; | |
3155 | ||
3156 | last_mode = t->mode; | |
3157 | } | |
3158 | ||
3159 | return last_mode; | |
3160 | } | |
3161 | ||
cf176e1a TH |
3162 | /** |
3163 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 3164 | * @dev: Device to adjust xfer masks |
458337db | 3165 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
3166 | * |
3167 | * Adjust xfer masks of @dev downward. Note that this function | |
3168 | * does not apply the change. Invoking ata_set_mode() afterwards | |
3169 | * will apply the limit. | |
3170 | * | |
3171 | * LOCKING: | |
3172 | * Inherited from caller. | |
3173 | * | |
3174 | * RETURNS: | |
3175 | * 0 on success, negative errno on failure | |
3176 | */ | |
458337db | 3177 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 3178 | { |
458337db | 3179 | char buf[32]; |
7dc951ae TH |
3180 | unsigned long orig_mask, xfer_mask; |
3181 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
458337db | 3182 | int quiet, highbit; |
cf176e1a | 3183 | |
458337db TH |
3184 | quiet = !!(sel & ATA_DNXFER_QUIET); |
3185 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 3186 | |
458337db TH |
3187 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
3188 | dev->mwdma_mask, | |
3189 | dev->udma_mask); | |
3190 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 3191 | |
458337db TH |
3192 | switch (sel) { |
3193 | case ATA_DNXFER_PIO: | |
3194 | highbit = fls(pio_mask) - 1; | |
3195 | pio_mask &= ~(1 << highbit); | |
3196 | break; | |
3197 | ||
3198 | case ATA_DNXFER_DMA: | |
3199 | if (udma_mask) { | |
3200 | highbit = fls(udma_mask) - 1; | |
3201 | udma_mask &= ~(1 << highbit); | |
3202 | if (!udma_mask) | |
3203 | return -ENOENT; | |
3204 | } else if (mwdma_mask) { | |
3205 | highbit = fls(mwdma_mask) - 1; | |
3206 | mwdma_mask &= ~(1 << highbit); | |
3207 | if (!mwdma_mask) | |
3208 | return -ENOENT; | |
3209 | } | |
3210 | break; | |
3211 | ||
3212 | case ATA_DNXFER_40C: | |
3213 | udma_mask &= ATA_UDMA_MASK_40C; | |
3214 | break; | |
3215 | ||
3216 | case ATA_DNXFER_FORCE_PIO0: | |
3217 | pio_mask &= 1; | |
3218 | case ATA_DNXFER_FORCE_PIO: | |
3219 | mwdma_mask = 0; | |
3220 | udma_mask = 0; | |
3221 | break; | |
3222 | ||
458337db TH |
3223 | default: |
3224 | BUG(); | |
3225 | } | |
3226 | ||
3227 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
3228 | ||
3229 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
3230 | return -ENOENT; | |
3231 | ||
3232 | if (!quiet) { | |
3233 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
3234 | snprintf(buf, sizeof(buf), "%s:%s", | |
3235 | ata_mode_string(xfer_mask), | |
3236 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
3237 | else | |
3238 | snprintf(buf, sizeof(buf), "%s", | |
3239 | ata_mode_string(xfer_mask)); | |
3240 | ||
3241 | ata_dev_printk(dev, KERN_WARNING, | |
3242 | "limiting speed to %s\n", buf); | |
3243 | } | |
cf176e1a TH |
3244 | |
3245 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
3246 | &dev->udma_mask); | |
3247 | ||
cf176e1a | 3248 | return 0; |
cf176e1a TH |
3249 | } |
3250 | ||
3373efd8 | 3251 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 3252 | { |
9af5c9c9 | 3253 | struct ata_eh_context *ehc = &dev->link->eh_context; |
4055dee7 TH |
3254 | const char *dev_err_whine = ""; |
3255 | int ign_dev_err = 0; | |
83206a29 TH |
3256 | unsigned int err_mask; |
3257 | int rc; | |
1da177e4 | 3258 | |
e8384607 | 3259 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
3260 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
3261 | dev->flags |= ATA_DFLAG_PIO; | |
3262 | ||
3373efd8 | 3263 | err_mask = ata_dev_set_xfermode(dev); |
2dcb407e | 3264 | |
4055dee7 TH |
3265 | if (err_mask & ~AC_ERR_DEV) |
3266 | goto fail; | |
3267 | ||
3268 | /* revalidate */ | |
3269 | ehc->i.flags |= ATA_EHI_POST_SETMODE; | |
3270 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); | |
3271 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; | |
3272 | if (rc) | |
3273 | return rc; | |
3274 | ||
11750a40 A |
3275 | /* Old CFA may refuse this command, which is just fine */ |
3276 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) | |
4055dee7 | 3277 | ign_dev_err = 1; |
2dcb407e | 3278 | |
0bc2a79a AC |
3279 | /* Some very old devices and some bad newer ones fail any kind of |
3280 | SET_XFERMODE request but support PIO0-2 timings and no IORDY */ | |
3281 | if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && | |
3282 | dev->pio_mode <= XFER_PIO_2) | |
4055dee7 | 3283 | ign_dev_err = 1; |
2dcb407e | 3284 | |
3acaf94b AC |
3285 | /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
3286 | Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ | |
c5038fc0 | 3287 | if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
3acaf94b AC |
3288 | dev->dma_mode == XFER_MW_DMA_0 && |
3289 | (dev->id[63] >> 8) & 1) | |
4055dee7 | 3290 | ign_dev_err = 1; |
3acaf94b | 3291 | |
4055dee7 TH |
3292 | /* if the device is actually configured correctly, ignore dev err */ |
3293 | if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) | |
3294 | ign_dev_err = 1; | |
1da177e4 | 3295 | |
4055dee7 TH |
3296 | if (err_mask & AC_ERR_DEV) { |
3297 | if (!ign_dev_err) | |
3298 | goto fail; | |
3299 | else | |
3300 | dev_err_whine = " (device error ignored)"; | |
3301 | } | |
48a8a14f | 3302 | |
23e71c3d TH |
3303 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
3304 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 3305 | |
4055dee7 TH |
3306 | ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", |
3307 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), | |
3308 | dev_err_whine); | |
3309 | ||
83206a29 | 3310 | return 0; |
4055dee7 TH |
3311 | |
3312 | fail: | |
3313 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " | |
3314 | "(err_mask=0x%x)\n", err_mask); | |
3315 | return -EIO; | |
1da177e4 LT |
3316 | } |
3317 | ||
1da177e4 | 3318 | /** |
04351821 | 3319 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 3320 | * @link: link on which timings will be programmed |
1967b7ff | 3321 | * @r_failed_dev: out parameter for failed device |
1da177e4 | 3322 | * |
04351821 A |
3323 | * Standard implementation of the function used to tune and set |
3324 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3325 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 3326 | * returned in @r_failed_dev. |
780a87f7 | 3327 | * |
1da177e4 | 3328 | * LOCKING: |
0cba632b | 3329 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
3330 | * |
3331 | * RETURNS: | |
3332 | * 0 on success, negative errno otherwise | |
1da177e4 | 3333 | */ |
04351821 | 3334 | |
0260731f | 3335 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 3336 | { |
0260731f | 3337 | struct ata_port *ap = link->ap; |
e8e0619f | 3338 | struct ata_device *dev; |
f58229f8 | 3339 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 3340 | |
a6d5a51c | 3341 | /* step 1: calculate xfer_mask */ |
f58229f8 | 3342 | ata_link_for_each_dev(dev, link) { |
7dc951ae | 3343 | unsigned long pio_mask, dma_mask; |
b3a70601 | 3344 | unsigned int mode_mask; |
a6d5a51c | 3345 | |
e1211e3f | 3346 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
3347 | continue; |
3348 | ||
b3a70601 AC |
3349 | mode_mask = ATA_DMA_MASK_ATA; |
3350 | if (dev->class == ATA_DEV_ATAPI) | |
3351 | mode_mask = ATA_DMA_MASK_ATAPI; | |
3352 | else if (ata_id_is_cfa(dev->id)) | |
3353 | mode_mask = ATA_DMA_MASK_CFA; | |
3354 | ||
3373efd8 | 3355 | ata_dev_xfermask(dev); |
33267325 | 3356 | ata_force_xfermask(dev); |
1da177e4 | 3357 | |
acf356b1 TH |
3358 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
3359 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
b3a70601 AC |
3360 | |
3361 | if (libata_dma_mask & mode_mask) | |
3362 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
3363 | else | |
3364 | dma_mask = 0; | |
3365 | ||
acf356b1 TH |
3366 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
3367 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 3368 | |
4f65977d | 3369 | found = 1; |
70cd071e | 3370 | if (dev->dma_mode != 0xff) |
5444a6f4 | 3371 | used_dma = 1; |
a6d5a51c | 3372 | } |
4f65977d | 3373 | if (!found) |
e82cbdb9 | 3374 | goto out; |
a6d5a51c TH |
3375 | |
3376 | /* step 2: always set host PIO timings */ | |
f58229f8 | 3377 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
3378 | if (!ata_dev_enabled(dev)) |
3379 | continue; | |
3380 | ||
70cd071e | 3381 | if (dev->pio_mode == 0xff) { |
f15a1daf | 3382 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 3383 | rc = -EINVAL; |
e82cbdb9 | 3384 | goto out; |
e8e0619f TH |
3385 | } |
3386 | ||
3387 | dev->xfer_mode = dev->pio_mode; | |
3388 | dev->xfer_shift = ATA_SHIFT_PIO; | |
3389 | if (ap->ops->set_piomode) | |
3390 | ap->ops->set_piomode(ap, dev); | |
3391 | } | |
1da177e4 | 3392 | |
a6d5a51c | 3393 | /* step 3: set host DMA timings */ |
f58229f8 | 3394 | ata_link_for_each_dev(dev, link) { |
70cd071e | 3395 | if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff) |
e8e0619f TH |
3396 | continue; |
3397 | ||
3398 | dev->xfer_mode = dev->dma_mode; | |
3399 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
3400 | if (ap->ops->set_dmamode) | |
3401 | ap->ops->set_dmamode(ap, dev); | |
3402 | } | |
1da177e4 LT |
3403 | |
3404 | /* step 4: update devices' xfer mode */ | |
f58229f8 | 3405 | ata_link_for_each_dev(dev, link) { |
18d90deb | 3406 | /* don't update suspended devices' xfer mode */ |
9666f400 | 3407 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
3408 | continue; |
3409 | ||
3373efd8 | 3410 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 3411 | if (rc) |
e82cbdb9 | 3412 | goto out; |
83206a29 | 3413 | } |
1da177e4 | 3414 | |
e8e0619f TH |
3415 | /* Record simplex status. If we selected DMA then the other |
3416 | * host channels are not permitted to do so. | |
5444a6f4 | 3417 | */ |
cca3974e | 3418 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 3419 | ap->host->simplex_claimed = ap; |
5444a6f4 | 3420 | |
e82cbdb9 TH |
3421 | out: |
3422 | if (rc) | |
3423 | *r_failed_dev = dev; | |
3424 | return rc; | |
1da177e4 LT |
3425 | } |
3426 | ||
1fdffbce JG |
3427 | /** |
3428 | * ata_tf_to_host - issue ATA taskfile to host controller | |
3429 | * @ap: port to which command is being issued | |
3430 | * @tf: ATA taskfile register set | |
3431 | * | |
3432 | * Issues ATA taskfile register set to ATA host controller, | |
3433 | * with proper synchronization with interrupt handler and | |
3434 | * other threads. | |
3435 | * | |
3436 | * LOCKING: | |
cca3974e | 3437 | * spin_lock_irqsave(host lock) |
1fdffbce JG |
3438 | */ |
3439 | ||
3440 | static inline void ata_tf_to_host(struct ata_port *ap, | |
3441 | const struct ata_taskfile *tf) | |
3442 | { | |
3443 | ap->ops->tf_load(ap, tf); | |
3444 | ap->ops->exec_command(ap, tf); | |
3445 | } | |
3446 | ||
1da177e4 LT |
3447 | /** |
3448 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
3449 | * @ap: port containing status register to be polled | |
3450 | * @tmout_pat: impatience timeout | |
3451 | * @tmout: overall timeout | |
3452 | * | |
780a87f7 JG |
3453 | * Sleep until ATA Status register bit BSY clears, |
3454 | * or a timeout occurs. | |
3455 | * | |
d1adc1bb TH |
3456 | * LOCKING: |
3457 | * Kernel thread context (may sleep). | |
3458 | * | |
3459 | * RETURNS: | |
3460 | * 0 on success, -errno otherwise. | |
1da177e4 | 3461 | */ |
d1adc1bb TH |
3462 | int ata_busy_sleep(struct ata_port *ap, |
3463 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
3464 | { |
3465 | unsigned long timer_start, timeout; | |
3466 | u8 status; | |
3467 | ||
3468 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
3469 | timer_start = jiffies; | |
3470 | timeout = timer_start + tmout_pat; | |
d1adc1bb TH |
3471 | while (status != 0xff && (status & ATA_BUSY) && |
3472 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3473 | msleep(50); |
3474 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
3475 | } | |
3476 | ||
d1adc1bb | 3477 | if (status != 0xff && (status & ATA_BUSY)) |
f15a1daf | 3478 | ata_port_printk(ap, KERN_WARNING, |
35aa7a43 JG |
3479 | "port is slow to respond, please be patient " |
3480 | "(Status 0x%x)\n", status); | |
1da177e4 LT |
3481 | |
3482 | timeout = timer_start + tmout; | |
d1adc1bb TH |
3483 | while (status != 0xff && (status & ATA_BUSY) && |
3484 | time_before(jiffies, timeout)) { | |
1da177e4 LT |
3485 | msleep(50); |
3486 | status = ata_chk_status(ap); | |
3487 | } | |
3488 | ||
d1adc1bb TH |
3489 | if (status == 0xff) |
3490 | return -ENODEV; | |
3491 | ||
1da177e4 | 3492 | if (status & ATA_BUSY) { |
f15a1daf | 3493 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
35aa7a43 JG |
3494 | "(%lu secs, Status 0x%x)\n", |
3495 | tmout / HZ, status); | |
d1adc1bb | 3496 | return -EBUSY; |
1da177e4 LT |
3497 | } |
3498 | ||
3499 | return 0; | |
3500 | } | |
3501 | ||
88ff6eaf TH |
3502 | /** |
3503 | * ata_wait_after_reset - wait before checking status after reset | |
3504 | * @ap: port containing status register to be polled | |
3505 | * @deadline: deadline jiffies for the operation | |
3506 | * | |
3507 | * After reset, we need to pause a while before reading status. | |
3508 | * Also, certain combination of controller and device report 0xff | |
3509 | * for some duration (e.g. until SATA PHY is up and running) | |
3510 | * which is interpreted as empty port in ATA world. This | |
3511 | * function also waits for such devices to get out of 0xff | |
3512 | * status. | |
3513 | * | |
3514 | * LOCKING: | |
3515 | * Kernel thread context (may sleep). | |
3516 | */ | |
3517 | void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline) | |
3518 | { | |
3519 | unsigned long until = jiffies + ATA_TMOUT_FF_WAIT; | |
3520 | ||
3521 | if (time_before(until, deadline)) | |
3522 | deadline = until; | |
3523 | ||
3524 | /* Spec mandates ">= 2ms" before checking status. We wait | |
3525 | * 150ms, because that was the magic delay used for ATAPI | |
3526 | * devices in Hale Landis's ATADRVR, for the period of time | |
3527 | * between when the ATA command register is written, and then | |
3528 | * status is checked. Because waiting for "a while" before | |
3529 | * checking status is fine, post SRST, we perform this magic | |
3530 | * delay here as well. | |
3531 | * | |
3532 | * Old drivers/ide uses the 2mS rule and then waits for ready. | |
3533 | */ | |
3534 | msleep(150); | |
3535 | ||
3536 | /* Wait for 0xff to clear. Some SATA devices take a long time | |
3537 | * to clear 0xff after reset. For example, HHD424020F7SV00 | |
3538 | * iVDR needs >= 800ms while. Quantum GoVault needs even more | |
3539 | * than that. | |
1974e201 TH |
3540 | * |
3541 | * Note that some PATA controllers (pata_ali) explode if | |
3542 | * status register is read more than once when there's no | |
3543 | * device attached. | |
88ff6eaf | 3544 | */ |
1974e201 TH |
3545 | if (ap->flags & ATA_FLAG_SATA) { |
3546 | while (1) { | |
3547 | u8 status = ata_chk_status(ap); | |
88ff6eaf | 3548 | |
1974e201 TH |
3549 | if (status != 0xff || time_after(jiffies, deadline)) |
3550 | return; | |
88ff6eaf | 3551 | |
1974e201 TH |
3552 | msleep(50); |
3553 | } | |
88ff6eaf TH |
3554 | } |
3555 | } | |
3556 | ||
d4b2bab4 TH |
3557 | /** |
3558 | * ata_wait_ready - sleep until BSY clears, or timeout | |
3559 | * @ap: port containing status register to be polled | |
3560 | * @deadline: deadline jiffies for the operation | |
3561 | * | |
3562 | * Sleep until ATA Status register bit BSY clears, or timeout | |
3563 | * occurs. | |
3564 | * | |
3565 | * LOCKING: | |
3566 | * Kernel thread context (may sleep). | |
3567 | * | |
3568 | * RETURNS: | |
3569 | * 0 on success, -errno otherwise. | |
3570 | */ | |
3571 | int ata_wait_ready(struct ata_port *ap, unsigned long deadline) | |
3572 | { | |
3573 | unsigned long start = jiffies; | |
3574 | int warned = 0; | |
3575 | ||
3576 | while (1) { | |
3577 | u8 status = ata_chk_status(ap); | |
3578 | unsigned long now = jiffies; | |
3579 | ||
3580 | if (!(status & ATA_BUSY)) | |
3581 | return 0; | |
936fd732 | 3582 | if (!ata_link_online(&ap->link) && status == 0xff) |
d4b2bab4 TH |
3583 | return -ENODEV; |
3584 | if (time_after(now, deadline)) | |
3585 | return -EBUSY; | |
3586 | ||
3587 | if (!warned && time_after(now, start + 5 * HZ) && | |
3588 | (deadline - now > 3 * HZ)) { | |
3589 | ata_port_printk(ap, KERN_WARNING, | |
3590 | "port is slow to respond, please be patient " | |
3591 | "(Status 0x%x)\n", status); | |
3592 | warned = 1; | |
3593 | } | |
3594 | ||
3595 | msleep(50); | |
3596 | } | |
3597 | } | |
3598 | ||
3599 | static int ata_bus_post_reset(struct ata_port *ap, unsigned int devmask, | |
3600 | unsigned long deadline) | |
1da177e4 LT |
3601 | { |
3602 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3603 | unsigned int dev0 = devmask & (1 << 0); | |
3604 | unsigned int dev1 = devmask & (1 << 1); | |
9b89391c | 3605 | int rc, ret = 0; |
1da177e4 LT |
3606 | |
3607 | /* if device 0 was found in ata_devchk, wait for its | |
3608 | * BSY bit to clear | |
3609 | */ | |
d4b2bab4 TH |
3610 | if (dev0) { |
3611 | rc = ata_wait_ready(ap, deadline); | |
9b89391c TH |
3612 | if (rc) { |
3613 | if (rc != -ENODEV) | |
3614 | return rc; | |
3615 | ret = rc; | |
3616 | } | |
d4b2bab4 | 3617 | } |
1da177e4 | 3618 | |
e141d999 TH |
3619 | /* if device 1 was found in ata_devchk, wait for register |
3620 | * access briefly, then wait for BSY to clear. | |
1da177e4 | 3621 | */ |
e141d999 TH |
3622 | if (dev1) { |
3623 | int i; | |
1da177e4 LT |
3624 | |
3625 | ap->ops->dev_select(ap, 1); | |
e141d999 TH |
3626 | |
3627 | /* Wait for register access. Some ATAPI devices fail | |
3628 | * to set nsect/lbal after reset, so don't waste too | |
3629 | * much time on it. We're gonna wait for !BSY anyway. | |
3630 | */ | |
3631 | for (i = 0; i < 2; i++) { | |
3632 | u8 nsect, lbal; | |
3633 | ||
3634 | nsect = ioread8(ioaddr->nsect_addr); | |
3635 | lbal = ioread8(ioaddr->lbal_addr); | |
3636 | if ((nsect == 1) && (lbal == 1)) | |
3637 | break; | |
3638 | msleep(50); /* give drive a breather */ | |
3639 | } | |
3640 | ||
d4b2bab4 | 3641 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
3642 | if (rc) { |
3643 | if (rc != -ENODEV) | |
3644 | return rc; | |
3645 | ret = rc; | |
3646 | } | |
d4b2bab4 | 3647 | } |
1da177e4 LT |
3648 | |
3649 | /* is all this really necessary? */ | |
3650 | ap->ops->dev_select(ap, 0); | |
3651 | if (dev1) | |
3652 | ap->ops->dev_select(ap, 1); | |
3653 | if (dev0) | |
3654 | ap->ops->dev_select(ap, 0); | |
d4b2bab4 | 3655 | |
9b89391c | 3656 | return ret; |
1da177e4 LT |
3657 | } |
3658 | ||
d4b2bab4 TH |
3659 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
3660 | unsigned long deadline) | |
1da177e4 LT |
3661 | { |
3662 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
3663 | ||
44877b4e | 3664 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
1da177e4 LT |
3665 | |
3666 | /* software reset. causes dev0 to be selected */ | |
0d5ff566 TH |
3667 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
3668 | udelay(20); /* FIXME: flush */ | |
3669 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
3670 | udelay(20); /* FIXME: flush */ | |
3671 | iowrite8(ap->ctl, ioaddr->ctl_addr); | |
1da177e4 | 3672 | |
88ff6eaf TH |
3673 | /* wait a while before checking status */ |
3674 | ata_wait_after_reset(ap, deadline); | |
1da177e4 | 3675 | |
2e9edbf8 | 3676 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
3677 | * the bus shows 0xFF because the odd clown forgets the D7 |
3678 | * pulldown resistor. | |
3679 | */ | |
150981b0 | 3680 | if (ata_chk_status(ap) == 0xFF) |
9b89391c | 3681 | return -ENODEV; |
09c7ad79 | 3682 | |
d4b2bab4 | 3683 | return ata_bus_post_reset(ap, devmask, deadline); |
1da177e4 LT |
3684 | } |
3685 | ||
3686 | /** | |
3687 | * ata_bus_reset - reset host port and associated ATA channel | |
3688 | * @ap: port to reset | |
3689 | * | |
3690 | * This is typically the first time we actually start issuing | |
3691 | * commands to the ATA channel. We wait for BSY to clear, then | |
3692 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
3693 | * result. Determine what devices, if any, are on the channel | |
3694 | * by looking at the device 0/1 error register. Look at the signature | |
3695 | * stored in each device's taskfile registers, to determine if | |
3696 | * the device is ATA or ATAPI. | |
3697 | * | |
3698 | * LOCKING: | |
0cba632b | 3699 | * PCI/etc. bus probe sem. |
cca3974e | 3700 | * Obtains host lock. |
1da177e4 LT |
3701 | * |
3702 | * SIDE EFFECTS: | |
198e0fed | 3703 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
1da177e4 LT |
3704 | */ |
3705 | ||
3706 | void ata_bus_reset(struct ata_port *ap) | |
3707 | { | |
9af5c9c9 | 3708 | struct ata_device *device = ap->link.device; |
1da177e4 LT |
3709 | struct ata_ioports *ioaddr = &ap->ioaddr; |
3710 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
3711 | u8 err; | |
aec5c3c1 | 3712 | unsigned int dev0, dev1 = 0, devmask = 0; |
9b89391c | 3713 | int rc; |
1da177e4 | 3714 | |
44877b4e | 3715 | DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no); |
1da177e4 LT |
3716 | |
3717 | /* determine if device 0/1 are present */ | |
3718 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
3719 | dev0 = 1; | |
3720 | else { | |
3721 | dev0 = ata_devchk(ap, 0); | |
3722 | if (slave_possible) | |
3723 | dev1 = ata_devchk(ap, 1); | |
3724 | } | |
3725 | ||
3726 | if (dev0) | |
3727 | devmask |= (1 << 0); | |
3728 | if (dev1) | |
3729 | devmask |= (1 << 1); | |
3730 | ||
3731 | /* select device 0 again */ | |
3732 | ap->ops->dev_select(ap, 0); | |
3733 | ||
3734 | /* issue bus reset */ | |
9b89391c TH |
3735 | if (ap->flags & ATA_FLAG_SRST) { |
3736 | rc = ata_bus_softreset(ap, devmask, jiffies + 40 * HZ); | |
3737 | if (rc && rc != -ENODEV) | |
aec5c3c1 | 3738 | goto err_out; |
9b89391c | 3739 | } |
1da177e4 LT |
3740 | |
3741 | /* | |
3742 | * determine by signature whether we have ATA or ATAPI devices | |
3743 | */ | |
3f19859e | 3744 | device[0].class = ata_dev_try_classify(&device[0], dev0, &err); |
1da177e4 | 3745 | if ((slave_possible) && (err != 0x81)) |
3f19859e | 3746 | device[1].class = ata_dev_try_classify(&device[1], dev1, &err); |
1da177e4 | 3747 | |
1da177e4 | 3748 | /* is double-select really necessary? */ |
9af5c9c9 | 3749 | if (device[1].class != ATA_DEV_NONE) |
1da177e4 | 3750 | ap->ops->dev_select(ap, 1); |
9af5c9c9 | 3751 | if (device[0].class != ATA_DEV_NONE) |
1da177e4 LT |
3752 | ap->ops->dev_select(ap, 0); |
3753 | ||
3754 | /* if no devices were detected, disable this port */ | |
9af5c9c9 TH |
3755 | if ((device[0].class == ATA_DEV_NONE) && |
3756 | (device[1].class == ATA_DEV_NONE)) | |
1da177e4 LT |
3757 | goto err_out; |
3758 | ||
3759 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
3760 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
0d5ff566 | 3761 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
1da177e4 LT |
3762 | } |
3763 | ||
3764 | DPRINTK("EXIT\n"); | |
3765 | return; | |
3766 | ||
3767 | err_out: | |
f15a1daf | 3768 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
ac8869d5 | 3769 | ata_port_disable(ap); |
1da177e4 LT |
3770 | |
3771 | DPRINTK("EXIT\n"); | |
3772 | } | |
3773 | ||
d7bb4cc7 | 3774 | /** |
936fd732 TH |
3775 | * sata_link_debounce - debounce SATA phy status |
3776 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3777 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3778 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3779 | * |
936fd732 | 3780 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3781 | * holding the same value where DET is not 1 for @duration polled |
3782 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3783 | * beginning of the stable state. Because DET gets stuck at 1 on |
3784 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3785 | * until timeout then returns 0 if DET is stable at 1. |
3786 | * | |
d4b2bab4 TH |
3787 | * @timeout is further limited by @deadline. The sooner of the |
3788 | * two is used. | |
3789 | * | |
d7bb4cc7 TH |
3790 | * LOCKING: |
3791 | * Kernel thread context (may sleep) | |
3792 | * | |
3793 | * RETURNS: | |
3794 | * 0 on success, -errno on failure. | |
3795 | */ | |
936fd732 TH |
3796 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3797 | unsigned long deadline) | |
7a7921e8 | 3798 | { |
d7bb4cc7 | 3799 | unsigned long interval_msec = params[0]; |
d4b2bab4 TH |
3800 | unsigned long duration = msecs_to_jiffies(params[1]); |
3801 | unsigned long last_jiffies, t; | |
d7bb4cc7 TH |
3802 | u32 last, cur; |
3803 | int rc; | |
3804 | ||
d4b2bab4 TH |
3805 | t = jiffies + msecs_to_jiffies(params[2]); |
3806 | if (time_before(t, deadline)) | |
3807 | deadline = t; | |
3808 | ||
936fd732 | 3809 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3810 | return rc; |
3811 | cur &= 0xf; | |
3812 | ||
3813 | last = cur; | |
3814 | last_jiffies = jiffies; | |
3815 | ||
3816 | while (1) { | |
3817 | msleep(interval_msec); | |
936fd732 | 3818 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3819 | return rc; |
3820 | cur &= 0xf; | |
3821 | ||
3822 | /* DET stable? */ | |
3823 | if (cur == last) { | |
d4b2bab4 | 3824 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 TH |
3825 | continue; |
3826 | if (time_after(jiffies, last_jiffies + duration)) | |
3827 | return 0; | |
3828 | continue; | |
3829 | } | |
3830 | ||
3831 | /* unstable, start over */ | |
3832 | last = cur; | |
3833 | last_jiffies = jiffies; | |
3834 | ||
f1545154 TH |
3835 | /* Check deadline. If debouncing failed, return |
3836 | * -EPIPE to tell upper layer to lower link speed. | |
3837 | */ | |
d4b2bab4 | 3838 | if (time_after(jiffies, deadline)) |
f1545154 | 3839 | return -EPIPE; |
d7bb4cc7 TH |
3840 | } |
3841 | } | |
3842 | ||
3843 | /** | |
936fd732 TH |
3844 | * sata_link_resume - resume SATA link |
3845 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3846 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3847 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3848 | * |
936fd732 | 3849 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3850 | * |
3851 | * LOCKING: | |
3852 | * Kernel thread context (may sleep) | |
3853 | * | |
3854 | * RETURNS: | |
3855 | * 0 on success, -errno on failure. | |
3856 | */ | |
936fd732 TH |
3857 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3858 | unsigned long deadline) | |
d7bb4cc7 TH |
3859 | { |
3860 | u32 scontrol; | |
81952c54 TH |
3861 | int rc; |
3862 | ||
936fd732 | 3863 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3864 | return rc; |
7a7921e8 | 3865 | |
852ee16a | 3866 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 | 3867 | |
936fd732 | 3868 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 | 3869 | return rc; |
7a7921e8 | 3870 | |
d7bb4cc7 TH |
3871 | /* Some PHYs react badly if SStatus is pounded immediately |
3872 | * after resuming. Delay 200ms before debouncing. | |
3873 | */ | |
3874 | msleep(200); | |
7a7921e8 | 3875 | |
936fd732 | 3876 | return sata_link_debounce(link, params, deadline); |
7a7921e8 TH |
3877 | } |
3878 | ||
f5914a46 TH |
3879 | /** |
3880 | * ata_std_prereset - prepare for reset | |
cc0680a5 | 3881 | * @link: ATA link to be reset |
d4b2bab4 | 3882 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3883 | * |
cc0680a5 | 3884 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3885 | * prereset makes libata abort whole reset sequence and give up |
3886 | * that port, so prereset should be best-effort. It does its | |
3887 | * best to prepare for reset sequence but if things go wrong, it | |
3888 | * should just whine, not fail. | |
f5914a46 TH |
3889 | * |
3890 | * LOCKING: | |
3891 | * Kernel thread context (may sleep) | |
3892 | * | |
3893 | * RETURNS: | |
3894 | * 0 on success, -errno otherwise. | |
3895 | */ | |
cc0680a5 | 3896 | int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3897 | { |
cc0680a5 | 3898 | struct ata_port *ap = link->ap; |
936fd732 | 3899 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3900 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3901 | int rc; |
3902 | ||
31daabda | 3903 | /* handle link resume */ |
28324304 | 3904 | if ((ehc->i.flags & ATA_EHI_RESUME_LINK) && |
0c88758b | 3905 | (link->flags & ATA_LFLAG_HRST_TO_RESUME)) |
28324304 TH |
3906 | ehc->i.action |= ATA_EH_HARDRESET; |
3907 | ||
633273a3 TH |
3908 | /* Some PMPs don't work with only SRST, force hardreset if PMP |
3909 | * is supported. | |
3910 | */ | |
3911 | if (ap->flags & ATA_FLAG_PMP) | |
3912 | ehc->i.action |= ATA_EH_HARDRESET; | |
3913 | ||
f5914a46 TH |
3914 | /* if we're about to do hardreset, nothing more to do */ |
3915 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3916 | return 0; | |
3917 | ||
936fd732 | 3918 | /* if SATA, resume link */ |
a16abc0b | 3919 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3920 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3921 | /* whine about phy resume failure but proceed */ |
3922 | if (rc && rc != -EOPNOTSUPP) | |
cc0680a5 | 3923 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
f5914a46 | 3924 | "link for reset (errno=%d)\n", rc); |
f5914a46 TH |
3925 | } |
3926 | ||
3927 | /* Wait for !BSY if the controller can wait for the first D2H | |
3928 | * Reg FIS and we don't know that no device is attached. | |
3929 | */ | |
0c88758b | 3930 | if (!(link->flags & ATA_LFLAG_SKIP_D2H_BSY) && !ata_link_offline(link)) { |
b8cffc6a | 3931 | rc = ata_wait_ready(ap, deadline); |
6dffaf61 | 3932 | if (rc && rc != -ENODEV) { |
cc0680a5 | 3933 | ata_link_printk(link, KERN_WARNING, "device not ready " |
b8cffc6a TH |
3934 | "(errno=%d), forcing hardreset\n", rc); |
3935 | ehc->i.action |= ATA_EH_HARDRESET; | |
3936 | } | |
3937 | } | |
f5914a46 TH |
3938 | |
3939 | return 0; | |
3940 | } | |
3941 | ||
c2bd5804 TH |
3942 | /** |
3943 | * ata_std_softreset - reset host port via ATA SRST | |
cc0680a5 | 3944 | * @link: ATA link to reset |
c2bd5804 | 3945 | * @classes: resulting classes of attached devices |
d4b2bab4 | 3946 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 3947 | * |
52783c5d | 3948 | * Reset host port using ATA SRST. |
c2bd5804 TH |
3949 | * |
3950 | * LOCKING: | |
3951 | * Kernel thread context (may sleep) | |
3952 | * | |
3953 | * RETURNS: | |
3954 | * 0 on success, -errno otherwise. | |
3955 | */ | |
cc0680a5 | 3956 | int ata_std_softreset(struct ata_link *link, unsigned int *classes, |
d4b2bab4 | 3957 | unsigned long deadline) |
c2bd5804 | 3958 | { |
cc0680a5 | 3959 | struct ata_port *ap = link->ap; |
c2bd5804 | 3960 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
d4b2bab4 TH |
3961 | unsigned int devmask = 0; |
3962 | int rc; | |
c2bd5804 TH |
3963 | u8 err; |
3964 | ||
3965 | DPRINTK("ENTER\n"); | |
3966 | ||
936fd732 | 3967 | if (ata_link_offline(link)) { |
3a39746a TH |
3968 | classes[0] = ATA_DEV_NONE; |
3969 | goto out; | |
3970 | } | |
3971 | ||
c2bd5804 TH |
3972 | /* determine if device 0/1 are present */ |
3973 | if (ata_devchk(ap, 0)) | |
3974 | devmask |= (1 << 0); | |
3975 | if (slave_possible && ata_devchk(ap, 1)) | |
3976 | devmask |= (1 << 1); | |
3977 | ||
c2bd5804 TH |
3978 | /* select device 0 again */ |
3979 | ap->ops->dev_select(ap, 0); | |
3980 | ||
3981 | /* issue bus reset */ | |
3982 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
d4b2bab4 | 3983 | rc = ata_bus_softreset(ap, devmask, deadline); |
9b89391c | 3984 | /* if link is occupied, -ENODEV too is an error */ |
936fd732 | 3985 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { |
cc0680a5 | 3986 | ata_link_printk(link, KERN_ERR, "SRST failed (errno=%d)\n", rc); |
d4b2bab4 | 3987 | return rc; |
c2bd5804 TH |
3988 | } |
3989 | ||
3990 | /* determine by signature whether we have ATA or ATAPI devices */ | |
3f19859e TH |
3991 | classes[0] = ata_dev_try_classify(&link->device[0], |
3992 | devmask & (1 << 0), &err); | |
c2bd5804 | 3993 | if (slave_possible && err != 0x81) |
3f19859e TH |
3994 | classes[1] = ata_dev_try_classify(&link->device[1], |
3995 | devmask & (1 << 1), &err); | |
c2bd5804 | 3996 | |
3a39746a | 3997 | out: |
c2bd5804 TH |
3998 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
3999 | return 0; | |
4000 | } | |
4001 | ||
4002 | /** | |
cc0680a5 TH |
4003 | * sata_link_hardreset - reset link via SATA phy reset |
4004 | * @link: link to reset | |
b6103f6d | 4005 | * @timing: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 4006 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 4007 | * |
cc0680a5 | 4008 | * SATA phy-reset @link using DET bits of SControl register. |
c2bd5804 TH |
4009 | * |
4010 | * LOCKING: | |
4011 | * Kernel thread context (may sleep) | |
4012 | * | |
4013 | * RETURNS: | |
4014 | * 0 on success, -errno otherwise. | |
4015 | */ | |
cc0680a5 | 4016 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
d4b2bab4 | 4017 | unsigned long deadline) |
c2bd5804 | 4018 | { |
852ee16a | 4019 | u32 scontrol; |
81952c54 | 4020 | int rc; |
852ee16a | 4021 | |
c2bd5804 TH |
4022 | DPRINTK("ENTER\n"); |
4023 | ||
936fd732 | 4024 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
4025 | /* SATA spec says nothing about how to reconfigure |
4026 | * spd. To be on the safe side, turn off phy during | |
4027 | * reconfiguration. This works for at least ICH7 AHCI | |
4028 | * and Sil3124. | |
4029 | */ | |
936fd732 | 4030 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 4031 | goto out; |
81952c54 | 4032 | |
a34b6fc0 | 4033 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 4034 | |
936fd732 | 4035 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 4036 | goto out; |
1c3fae4d | 4037 | |
936fd732 | 4038 | sata_set_spd(link); |
1c3fae4d TH |
4039 | } |
4040 | ||
4041 | /* issue phy wake/reset */ | |
936fd732 | 4042 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 4043 | goto out; |
81952c54 | 4044 | |
852ee16a | 4045 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 4046 | |
936fd732 | 4047 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 4048 | goto out; |
c2bd5804 | 4049 | |
1c3fae4d | 4050 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
4051 | * 10.4.2 says at least 1 ms. |
4052 | */ | |
4053 | msleep(1); | |
4054 | ||
936fd732 TH |
4055 | /* bring link back */ |
4056 | rc = sata_link_resume(link, timing, deadline); | |
b6103f6d TH |
4057 | out: |
4058 | DPRINTK("EXIT, rc=%d\n", rc); | |
4059 | return rc; | |
4060 | } | |
4061 | ||
4062 | /** | |
4063 | * sata_std_hardreset - reset host port via SATA phy reset | |
cc0680a5 | 4064 | * @link: link to reset |
b6103f6d | 4065 | * @class: resulting class of attached device |
d4b2bab4 | 4066 | * @deadline: deadline jiffies for the operation |
b6103f6d TH |
4067 | * |
4068 | * SATA phy-reset host port using DET bits of SControl register, | |
4069 | * wait for !BSY and classify the attached device. | |
4070 | * | |
4071 | * LOCKING: | |
4072 | * Kernel thread context (may sleep) | |
4073 | * | |
4074 | * RETURNS: | |
4075 | * 0 on success, -errno otherwise. | |
4076 | */ | |
cc0680a5 | 4077 | int sata_std_hardreset(struct ata_link *link, unsigned int *class, |
d4b2bab4 | 4078 | unsigned long deadline) |
b6103f6d | 4079 | { |
cc0680a5 | 4080 | struct ata_port *ap = link->ap; |
936fd732 | 4081 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); |
b6103f6d TH |
4082 | int rc; |
4083 | ||
4084 | DPRINTK("ENTER\n"); | |
4085 | ||
4086 | /* do hardreset */ | |
cc0680a5 | 4087 | rc = sata_link_hardreset(link, timing, deadline); |
b6103f6d | 4088 | if (rc) { |
cc0680a5 | 4089 | ata_link_printk(link, KERN_ERR, |
b6103f6d TH |
4090 | "COMRESET failed (errno=%d)\n", rc); |
4091 | return rc; | |
4092 | } | |
c2bd5804 | 4093 | |
c2bd5804 | 4094 | /* TODO: phy layer with polling, timeouts, etc. */ |
936fd732 | 4095 | if (ata_link_offline(link)) { |
c2bd5804 TH |
4096 | *class = ATA_DEV_NONE; |
4097 | DPRINTK("EXIT, link offline\n"); | |
4098 | return 0; | |
4099 | } | |
4100 | ||
88ff6eaf TH |
4101 | /* wait a while before checking status */ |
4102 | ata_wait_after_reset(ap, deadline); | |
34fee227 | 4103 | |
633273a3 TH |
4104 | /* If PMP is supported, we have to do follow-up SRST. Note |
4105 | * that some PMPs don't send D2H Reg FIS after hardreset at | |
4106 | * all if the first port is empty. Wait for it just for a | |
4107 | * second and request follow-up SRST. | |
4108 | */ | |
4109 | if (ap->flags & ATA_FLAG_PMP) { | |
4110 | ata_wait_ready(ap, jiffies + HZ); | |
4111 | return -EAGAIN; | |
4112 | } | |
4113 | ||
d4b2bab4 | 4114 | rc = ata_wait_ready(ap, deadline); |
9b89391c TH |
4115 | /* link occupied, -ENODEV too is an error */ |
4116 | if (rc) { | |
cc0680a5 | 4117 | ata_link_printk(link, KERN_ERR, |
d4b2bab4 TH |
4118 | "COMRESET failed (errno=%d)\n", rc); |
4119 | return rc; | |
c2bd5804 TH |
4120 | } |
4121 | ||
3a39746a TH |
4122 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
4123 | ||
3f19859e | 4124 | *class = ata_dev_try_classify(link->device, 1, NULL); |
c2bd5804 TH |
4125 | |
4126 | DPRINTK("EXIT, class=%u\n", *class); | |
4127 | return 0; | |
4128 | } | |
4129 | ||
4130 | /** | |
4131 | * ata_std_postreset - standard postreset callback | |
cc0680a5 | 4132 | * @link: the target ata_link |
c2bd5804 TH |
4133 | * @classes: classes of attached devices |
4134 | * | |
4135 | * This function is invoked after a successful reset. Note that | |
4136 | * the device might have been reset more than once using | |
4137 | * different reset methods before postreset is invoked. | |
c2bd5804 | 4138 | * |
c2bd5804 TH |
4139 | * LOCKING: |
4140 | * Kernel thread context (may sleep) | |
4141 | */ | |
cc0680a5 | 4142 | void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 4143 | { |
cc0680a5 | 4144 | struct ata_port *ap = link->ap; |
dc2b3515 TH |
4145 | u32 serror; |
4146 | ||
c2bd5804 TH |
4147 | DPRINTK("ENTER\n"); |
4148 | ||
c2bd5804 | 4149 | /* print link status */ |
936fd732 | 4150 | sata_print_link_status(link); |
c2bd5804 | 4151 | |
dc2b3515 | 4152 | /* clear SError */ |
936fd732 TH |
4153 | if (sata_scr_read(link, SCR_ERROR, &serror) == 0) |
4154 | sata_scr_write(link, SCR_ERROR, serror); | |
f7fe7ad4 | 4155 | link->eh_info.serror = 0; |
dc2b3515 | 4156 | |
c2bd5804 TH |
4157 | /* is double-select really necessary? */ |
4158 | if (classes[0] != ATA_DEV_NONE) | |
4159 | ap->ops->dev_select(ap, 1); | |
4160 | if (classes[1] != ATA_DEV_NONE) | |
4161 | ap->ops->dev_select(ap, 0); | |
4162 | ||
3a39746a TH |
4163 | /* bail out if no device is present */ |
4164 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
4165 | DPRINTK("EXIT, no device\n"); | |
4166 | return; | |
4167 | } | |
4168 | ||
4169 | /* set up device control */ | |
0d5ff566 TH |
4170 | if (ap->ioaddr.ctl_addr) |
4171 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); | |
c2bd5804 TH |
4172 | |
4173 | DPRINTK("EXIT\n"); | |
4174 | } | |
4175 | ||
623a3128 TH |
4176 | /** |
4177 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
4178 | * @dev: device to compare against |
4179 | * @new_class: class of the new device | |
4180 | * @new_id: IDENTIFY page of the new device | |
4181 | * | |
4182 | * Compare @new_class and @new_id against @dev and determine | |
4183 | * whether @dev is the device indicated by @new_class and | |
4184 | * @new_id. | |
4185 | * | |
4186 | * LOCKING: | |
4187 | * None. | |
4188 | * | |
4189 | * RETURNS: | |
4190 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
4191 | */ | |
3373efd8 TH |
4192 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
4193 | const u16 *new_id) | |
623a3128 TH |
4194 | { |
4195 | const u16 *old_id = dev->id; | |
a0cf733b TH |
4196 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
4197 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
4198 | |
4199 | if (dev->class != new_class) { | |
f15a1daf TH |
4200 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
4201 | dev->class, new_class); | |
623a3128 TH |
4202 | return 0; |
4203 | } | |
4204 | ||
a0cf733b TH |
4205 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
4206 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
4207 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
4208 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
4209 | |
4210 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
4211 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
4212 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
4213 | return 0; |
4214 | } | |
4215 | ||
4216 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
4217 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
4218 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
4219 | return 0; |
4220 | } | |
4221 | ||
623a3128 TH |
4222 | return 1; |
4223 | } | |
4224 | ||
4225 | /** | |
fe30911b | 4226 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 4227 | * @dev: target ATA device |
bff04647 | 4228 | * @readid_flags: read ID flags |
623a3128 TH |
4229 | * |
4230 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
4231 | * the port. | |
4232 | * | |
4233 | * LOCKING: | |
4234 | * Kernel thread context (may sleep) | |
4235 | * | |
4236 | * RETURNS: | |
4237 | * 0 on success, negative errno otherwise | |
4238 | */ | |
fe30911b | 4239 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 4240 | { |
5eb45c02 | 4241 | unsigned int class = dev->class; |
9af5c9c9 | 4242 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
4243 | int rc; |
4244 | ||
fe635c7e | 4245 | /* read ID data */ |
bff04647 | 4246 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 4247 | if (rc) |
fe30911b | 4248 | return rc; |
623a3128 TH |
4249 | |
4250 | /* is the device still there? */ | |
fe30911b TH |
4251 | if (!ata_dev_same_device(dev, class, id)) |
4252 | return -ENODEV; | |
623a3128 | 4253 | |
fe635c7e | 4254 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
4255 | return 0; |
4256 | } | |
4257 | ||
4258 | /** | |
4259 | * ata_dev_revalidate - Revalidate ATA device | |
4260 | * @dev: device to revalidate | |
422c9daa | 4261 | * @new_class: new class code |
fe30911b TH |
4262 | * @readid_flags: read ID flags |
4263 | * | |
4264 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
4265 | * port and reconfigure it according to the new IDENTIFY page. | |
4266 | * | |
4267 | * LOCKING: | |
4268 | * Kernel thread context (may sleep) | |
4269 | * | |
4270 | * RETURNS: | |
4271 | * 0 on success, negative errno otherwise | |
4272 | */ | |
422c9daa TH |
4273 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
4274 | unsigned int readid_flags) | |
fe30911b | 4275 | { |
6ddcd3b0 | 4276 | u64 n_sectors = dev->n_sectors; |
fe30911b TH |
4277 | int rc; |
4278 | ||
4279 | if (!ata_dev_enabled(dev)) | |
4280 | return -ENODEV; | |
4281 | ||
422c9daa TH |
4282 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
4283 | if (ata_class_enabled(new_class) && | |
4284 | new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { | |
4285 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", | |
4286 | dev->class, new_class); | |
4287 | rc = -ENODEV; | |
4288 | goto fail; | |
4289 | } | |
4290 | ||
fe30911b TH |
4291 | /* re-read ID */ |
4292 | rc = ata_dev_reread_id(dev, readid_flags); | |
4293 | if (rc) | |
4294 | goto fail; | |
623a3128 TH |
4295 | |
4296 | /* configure device according to the new ID */ | |
efdaedc4 | 4297 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
4298 | if (rc) |
4299 | goto fail; | |
4300 | ||
4301 | /* verify n_sectors hasn't changed */ | |
b54eebd6 TH |
4302 | if (dev->class == ATA_DEV_ATA && n_sectors && |
4303 | dev->n_sectors != n_sectors) { | |
6ddcd3b0 TH |
4304 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
4305 | "%llu != %llu\n", | |
4306 | (unsigned long long)n_sectors, | |
4307 | (unsigned long long)dev->n_sectors); | |
8270bec4 TH |
4308 | |
4309 | /* restore original n_sectors */ | |
4310 | dev->n_sectors = n_sectors; | |
4311 | ||
6ddcd3b0 TH |
4312 | rc = -ENODEV; |
4313 | goto fail; | |
4314 | } | |
4315 | ||
4316 | return 0; | |
623a3128 TH |
4317 | |
4318 | fail: | |
f15a1daf | 4319 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
4320 | return rc; |
4321 | } | |
4322 | ||
6919a0a6 AC |
4323 | struct ata_blacklist_entry { |
4324 | const char *model_num; | |
4325 | const char *model_rev; | |
4326 | unsigned long horkage; | |
4327 | }; | |
4328 | ||
4329 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
4330 | /* Devices with DMA related problems under Linux */ | |
4331 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
4332 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
4333 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
4334 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
4335 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
4336 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
4337 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
4338 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
4339 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
4340 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
4341 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
4342 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
4343 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
4344 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
4345 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
4346 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
4347 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
4348 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
4349 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
4350 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
4351 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
4352 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
4353 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
4354 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
4355 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
4356 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
4357 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
4358 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
2dcb407e | 4359 | { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
39f19886 | 4360 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
3af9a77a TH |
4361 | /* Odd clown on sil3726/4726 PMPs */ |
4362 | { "Config Disk", NULL, ATA_HORKAGE_NODMA | | |
4363 | ATA_HORKAGE_SKIP_PM }, | |
6919a0a6 | 4364 | |
18d6e9d5 | 4365 | /* Weird ATAPI devices */ |
40a1d531 | 4366 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
18d6e9d5 | 4367 | |
6919a0a6 AC |
4368 | /* Devices we expect to fail diagnostics */ |
4369 | ||
4370 | /* Devices where NCQ should be avoided */ | |
4371 | /* NCQ is slow */ | |
2dcb407e | 4372 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
459ad688 | 4373 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
09125ea6 TH |
4374 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
4375 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 4376 | /* NCQ is broken */ |
539cc7c7 | 4377 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 4378 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
da6f0ec2 | 4379 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
e41bd3e8 | 4380 | { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
539cc7c7 | 4381 | |
36e337d0 RH |
4382 | /* Blacklist entries taken from Silicon Image 3124/3132 |
4383 | Windows driver .inf file - also several Linux problem reports */ | |
4384 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
4385 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
4386 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 | 4387 | |
16c55b03 TH |
4388 | /* devices which puke on READ_NATIVE_MAX */ |
4389 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
4390 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
4391 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
4392 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 4393 | |
93328e11 AC |
4394 | /* Devices which report 1 sector over size HPA */ |
4395 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
4396 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
b152fcd3 | 4397 | { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
93328e11 | 4398 | |
6bbfd53d AC |
4399 | /* Devices which get the IVB wrong */ |
4400 | { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, | |
4401 | { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, | |
e9f33406 PM |
4402 | { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, |
4403 | { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, | |
4404 | { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, | |
6bbfd53d | 4405 | |
6919a0a6 AC |
4406 | /* End Marker */ |
4407 | { } | |
1da177e4 | 4408 | }; |
2e9edbf8 | 4409 | |
741b7763 | 4410 | static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
539cc7c7 JG |
4411 | { |
4412 | const char *p; | |
4413 | int len; | |
4414 | ||
4415 | /* | |
4416 | * check for trailing wildcard: *\0 | |
4417 | */ | |
4418 | p = strchr(patt, wildchar); | |
4419 | if (p && ((*(p + 1)) == 0)) | |
4420 | len = p - patt; | |
317b50b8 | 4421 | else { |
539cc7c7 | 4422 | len = strlen(name); |
317b50b8 AP |
4423 | if (!len) { |
4424 | if (!*patt) | |
4425 | return 0; | |
4426 | return -1; | |
4427 | } | |
4428 | } | |
539cc7c7 JG |
4429 | |
4430 | return strncmp(patt, name, len); | |
4431 | } | |
4432 | ||
75683fe7 | 4433 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 4434 | { |
8bfa79fc TH |
4435 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
4436 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 4437 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 4438 | |
8bfa79fc TH |
4439 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
4440 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 4441 | |
6919a0a6 | 4442 | while (ad->model_num) { |
539cc7c7 | 4443 | if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
6919a0a6 AC |
4444 | if (ad->model_rev == NULL) |
4445 | return ad->horkage; | |
539cc7c7 | 4446 | if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
6919a0a6 | 4447 | return ad->horkage; |
f4b15fef | 4448 | } |
6919a0a6 | 4449 | ad++; |
f4b15fef | 4450 | } |
1da177e4 LT |
4451 | return 0; |
4452 | } | |
4453 | ||
6919a0a6 AC |
4454 | static int ata_dma_blacklisted(const struct ata_device *dev) |
4455 | { | |
4456 | /* We don't support polling DMA. | |
4457 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
4458 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
4459 | */ | |
9af5c9c9 | 4460 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
4461 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
4462 | return 1; | |
75683fe7 | 4463 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
4464 | } |
4465 | ||
6bbfd53d AC |
4466 | /** |
4467 | * ata_is_40wire - check drive side detection | |
4468 | * @dev: device | |
4469 | * | |
4470 | * Perform drive side detection decoding, allowing for device vendors | |
4471 | * who can't follow the documentation. | |
4472 | */ | |
4473 | ||
4474 | static int ata_is_40wire(struct ata_device *dev) | |
4475 | { | |
4476 | if (dev->horkage & ATA_HORKAGE_IVB) | |
4477 | return ata_drive_40wire_relaxed(dev->id); | |
4478 | return ata_drive_40wire(dev->id); | |
4479 | } | |
4480 | ||
a6d5a51c TH |
4481 | /** |
4482 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
4483 | * @dev: Device to compute xfermask for |
4484 | * | |
acf356b1 TH |
4485 | * Compute supported xfermask of @dev and store it in |
4486 | * dev->*_mask. This function is responsible for applying all | |
4487 | * known limits including host controller limits, device | |
4488 | * blacklist, etc... | |
a6d5a51c TH |
4489 | * |
4490 | * LOCKING: | |
4491 | * None. | |
a6d5a51c | 4492 | */ |
3373efd8 | 4493 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 4494 | { |
9af5c9c9 TH |
4495 | struct ata_link *link = dev->link; |
4496 | struct ata_port *ap = link->ap; | |
cca3974e | 4497 | struct ata_host *host = ap->host; |
a6d5a51c | 4498 | unsigned long xfer_mask; |
1da177e4 | 4499 | |
37deecb5 | 4500 | /* controller modes available */ |
565083e1 TH |
4501 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
4502 | ap->mwdma_mask, ap->udma_mask); | |
4503 | ||
8343f889 | 4504 | /* drive modes available */ |
37deecb5 TH |
4505 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
4506 | dev->mwdma_mask, dev->udma_mask); | |
4507 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 4508 | |
b352e57d AC |
4509 | /* |
4510 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
4511 | * cable | |
4512 | */ | |
4513 | if (ata_dev_pair(dev)) { | |
4514 | /* No PIO5 or PIO6 */ | |
4515 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
4516 | /* No MWDMA3 or MWDMA 4 */ | |
4517 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
4518 | } | |
4519 | ||
37deecb5 TH |
4520 | if (ata_dma_blacklisted(dev)) { |
4521 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
4522 | ata_dev_printk(dev, KERN_WARNING, |
4523 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 4524 | } |
a6d5a51c | 4525 | |
14d66ab7 | 4526 | if ((host->flags & ATA_HOST_SIMPLEX) && |
2dcb407e | 4527 | host->simplex_claimed && host->simplex_claimed != ap) { |
37deecb5 TH |
4528 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
4529 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
4530 | "other device, disabling DMA\n"); | |
5444a6f4 | 4531 | } |
565083e1 | 4532 | |
e424675f JG |
4533 | if (ap->flags & ATA_FLAG_NO_IORDY) |
4534 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
4535 | ||
5444a6f4 | 4536 | if (ap->ops->mode_filter) |
a76b62ca | 4537 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 4538 | |
8343f889 RH |
4539 | /* Apply cable rule here. Don't apply it early because when |
4540 | * we handle hot plug the cable type can itself change. | |
4541 | * Check this last so that we know if the transfer rate was | |
4542 | * solely limited by the cable. | |
4543 | * Unknown or 80 wire cables reported host side are checked | |
4544 | * drive side as well. Cases where we know a 40wire cable | |
4545 | * is used safely for 80 are not checked here. | |
4546 | */ | |
4547 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
4548 | /* UDMA/44 or higher would be available */ | |
2dcb407e | 4549 | if ((ap->cbl == ATA_CBL_PATA40) || |
6bbfd53d | 4550 | (ata_is_40wire(dev) && |
2dcb407e JG |
4551 | (ap->cbl == ATA_CBL_PATA_UNK || |
4552 | ap->cbl == ATA_CBL_PATA80))) { | |
4553 | ata_dev_printk(dev, KERN_WARNING, | |
8343f889 RH |
4554 | "limited to UDMA/33 due to 40-wire cable\n"); |
4555 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
4556 | } | |
4557 | ||
565083e1 TH |
4558 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4559 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4560 | } |
4561 | ||
1da177e4 LT |
4562 | /** |
4563 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4564 | * @dev: Device to which command will be sent |
4565 | * | |
780a87f7 JG |
4566 | * Issue SET FEATURES - XFER MODE command to device @dev |
4567 | * on port @ap. | |
4568 | * | |
1da177e4 | 4569 | * LOCKING: |
0cba632b | 4570 | * PCI/etc. bus probe sem. |
83206a29 TH |
4571 | * |
4572 | * RETURNS: | |
4573 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4574 | */ |
4575 | ||
3373efd8 | 4576 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4577 | { |
a0123703 | 4578 | struct ata_taskfile tf; |
83206a29 | 4579 | unsigned int err_mask; |
1da177e4 LT |
4580 | |
4581 | /* set up set-features taskfile */ | |
4582 | DPRINTK("set features - xfer mode\n"); | |
4583 | ||
464cf177 TH |
4584 | /* Some controllers and ATAPI devices show flaky interrupt |
4585 | * behavior after setting xfer mode. Use polling instead. | |
4586 | */ | |
3373efd8 | 4587 | ata_tf_init(dev, &tf); |
a0123703 TH |
4588 | tf.command = ATA_CMD_SET_FEATURES; |
4589 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4590 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 | 4591 | tf.protocol = ATA_PROT_NODATA; |
b9f8ab2d | 4592 | /* If we are using IORDY we must send the mode setting command */ |
11b7becc JG |
4593 | if (ata_pio_need_iordy(dev)) |
4594 | tf.nsect = dev->xfer_mode; | |
b9f8ab2d AC |
4595 | /* If the device has IORDY and the controller does not - turn it off */ |
4596 | else if (ata_id_has_iordy(dev->id)) | |
11b7becc | 4597 | tf.nsect = 0x01; |
b9f8ab2d AC |
4598 | else /* In the ancient relic department - skip all of this */ |
4599 | return 0; | |
1da177e4 | 4600 | |
2b789108 | 4601 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
9f45cbd3 KCA |
4602 | |
4603 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4604 | return err_mask; | |
4605 | } | |
9f45cbd3 | 4606 | /** |
218f3d30 | 4607 | * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
9f45cbd3 KCA |
4608 | * @dev: Device to which command will be sent |
4609 | * @enable: Whether to enable or disable the feature | |
218f3d30 | 4610 | * @feature: The sector count represents the feature to set |
9f45cbd3 KCA |
4611 | * |
4612 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
218f3d30 | 4613 | * on port @ap with sector count |
9f45cbd3 KCA |
4614 | * |
4615 | * LOCKING: | |
4616 | * PCI/etc. bus probe sem. | |
4617 | * | |
4618 | * RETURNS: | |
4619 | * 0 on success, AC_ERR_* mask otherwise. | |
4620 | */ | |
218f3d30 JG |
4621 | static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, |
4622 | u8 feature) | |
9f45cbd3 KCA |
4623 | { |
4624 | struct ata_taskfile tf; | |
4625 | unsigned int err_mask; | |
4626 | ||
4627 | /* set up set-features taskfile */ | |
4628 | DPRINTK("set features - SATA features\n"); | |
4629 | ||
4630 | ata_tf_init(dev, &tf); | |
4631 | tf.command = ATA_CMD_SET_FEATURES; | |
4632 | tf.feature = enable; | |
4633 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4634 | tf.protocol = ATA_PROT_NODATA; | |
218f3d30 | 4635 | tf.nsect = feature; |
9f45cbd3 | 4636 | |
2b789108 | 4637 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
1da177e4 | 4638 | |
83206a29 TH |
4639 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4640 | return err_mask; | |
1da177e4 LT |
4641 | } |
4642 | ||
8bf62ece AL |
4643 | /** |
4644 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4645 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4646 | * @heads: Number of heads (taskfile parameter) |
4647 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4648 | * |
4649 | * LOCKING: | |
6aff8f1f TH |
4650 | * Kernel thread context (may sleep) |
4651 | * | |
4652 | * RETURNS: | |
4653 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4654 | */ |
3373efd8 TH |
4655 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4656 | u16 heads, u16 sectors) | |
8bf62ece | 4657 | { |
a0123703 | 4658 | struct ata_taskfile tf; |
6aff8f1f | 4659 | unsigned int err_mask; |
8bf62ece AL |
4660 | |
4661 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4662 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4663 | return AC_ERR_INVALID; |
8bf62ece AL |
4664 | |
4665 | /* set up init dev params taskfile */ | |
4666 | DPRINTK("init dev params \n"); | |
4667 | ||
3373efd8 | 4668 | ata_tf_init(dev, &tf); |
a0123703 TH |
4669 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4670 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4671 | tf.protocol = ATA_PROT_NODATA; | |
4672 | tf.nsect = sectors; | |
4673 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4674 | |
2b789108 | 4675 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
18b2466c AC |
4676 | /* A clean abort indicates an original or just out of spec drive |
4677 | and we should continue as we issue the setup based on the | |
4678 | drive reported working geometry */ | |
4679 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4680 | err_mask = 0; | |
8bf62ece | 4681 | |
6aff8f1f TH |
4682 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4683 | return err_mask; | |
8bf62ece AL |
4684 | } |
4685 | ||
1da177e4 | 4686 | /** |
0cba632b JG |
4687 | * ata_sg_clean - Unmap DMA memory associated with command |
4688 | * @qc: Command containing DMA memory to be released | |
4689 | * | |
4690 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4691 | * |
4692 | * LOCKING: | |
cca3974e | 4693 | * spin_lock_irqsave(host lock) |
1da177e4 | 4694 | */ |
70e6ad0c | 4695 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4696 | { |
4697 | struct ata_port *ap = qc->ap; | |
ff2aeb1e | 4698 | struct scatterlist *sg = qc->sg; |
1da177e4 LT |
4699 | int dir = qc->dma_dir; |
4700 | ||
a4631474 | 4701 | WARN_ON(sg == NULL); |
1da177e4 | 4702 | |
dde20207 | 4703 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4704 | |
dde20207 JB |
4705 | if (qc->n_elem) |
4706 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); | |
1da177e4 LT |
4707 | |
4708 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
ff2aeb1e | 4709 | qc->sg = NULL; |
1da177e4 LT |
4710 | } |
4711 | ||
4712 | /** | |
4713 | * ata_fill_sg - Fill PCI IDE PRD table | |
4714 | * @qc: Metadata associated with taskfile to be transferred | |
4715 | * | |
780a87f7 JG |
4716 | * Fill PCI IDE PRD (scatter-gather) table with segments |
4717 | * associated with the current disk command. | |
4718 | * | |
1da177e4 | 4719 | * LOCKING: |
cca3974e | 4720 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4721 | * |
4722 | */ | |
4723 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
4724 | { | |
1da177e4 | 4725 | struct ata_port *ap = qc->ap; |
cedc9a47 | 4726 | struct scatterlist *sg; |
ff2aeb1e | 4727 | unsigned int si, pi; |
1da177e4 | 4728 | |
ff2aeb1e TH |
4729 | pi = 0; |
4730 | for_each_sg(qc->sg, sg, qc->n_elem, si) { | |
1da177e4 LT |
4731 | u32 addr, offset; |
4732 | u32 sg_len, len; | |
4733 | ||
4734 | /* determine if physical DMA addr spans 64K boundary. | |
4735 | * Note h/w doesn't support 64-bit, so we unconditionally | |
4736 | * truncate dma_addr_t to u32. | |
4737 | */ | |
4738 | addr = (u32) sg_dma_address(sg); | |
4739 | sg_len = sg_dma_len(sg); | |
4740 | ||
4741 | while (sg_len) { | |
4742 | offset = addr & 0xffff; | |
4743 | len = sg_len; | |
4744 | if ((offset + sg_len) > 0x10000) | |
4745 | len = 0x10000 - offset; | |
4746 | ||
ff2aeb1e TH |
4747 | ap->prd[pi].addr = cpu_to_le32(addr); |
4748 | ap->prd[pi].flags_len = cpu_to_le32(len & 0xffff); | |
4749 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); | |
1da177e4 | 4750 | |
ff2aeb1e | 4751 | pi++; |
1da177e4 LT |
4752 | sg_len -= len; |
4753 | addr += len; | |
4754 | } | |
4755 | } | |
4756 | ||
ff2aeb1e | 4757 | ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
1da177e4 | 4758 | } |
b9a4197e | 4759 | |
d26fc955 AC |
4760 | /** |
4761 | * ata_fill_sg_dumb - Fill PCI IDE PRD table | |
4762 | * @qc: Metadata associated with taskfile to be transferred | |
4763 | * | |
4764 | * Fill PCI IDE PRD (scatter-gather) table with segments | |
4765 | * associated with the current disk command. Perform the fill | |
4766 | * so that we avoid writing any length 64K records for | |
4767 | * controllers that don't follow the spec. | |
4768 | * | |
4769 | * LOCKING: | |
4770 | * spin_lock_irqsave(host lock) | |
4771 | * | |
4772 | */ | |
4773 | static void ata_fill_sg_dumb(struct ata_queued_cmd *qc) | |
4774 | { | |
4775 | struct ata_port *ap = qc->ap; | |
4776 | struct scatterlist *sg; | |
ff2aeb1e | 4777 | unsigned int si, pi; |
d26fc955 | 4778 | |
ff2aeb1e TH |
4779 | pi = 0; |
4780 | for_each_sg(qc->sg, sg, qc->n_elem, si) { | |
d26fc955 AC |
4781 | u32 addr, offset; |
4782 | u32 sg_len, len, blen; | |
4783 | ||
2dcb407e | 4784 | /* determine if physical DMA addr spans 64K boundary. |
d26fc955 AC |
4785 | * Note h/w doesn't support 64-bit, so we unconditionally |
4786 | * truncate dma_addr_t to u32. | |
4787 | */ | |
4788 | addr = (u32) sg_dma_address(sg); | |
4789 | sg_len = sg_dma_len(sg); | |
4790 | ||
4791 | while (sg_len) { | |
4792 | offset = addr & 0xffff; | |
4793 | len = sg_len; | |
4794 | if ((offset + sg_len) > 0x10000) | |
4795 | len = 0x10000 - offset; | |
4796 | ||
4797 | blen = len & 0xffff; | |
ff2aeb1e | 4798 | ap->prd[pi].addr = cpu_to_le32(addr); |
d26fc955 AC |
4799 | if (blen == 0) { |
4800 | /* Some PATA chipsets like the CS5530 can't | |
4801 | cope with 0x0000 meaning 64K as the spec says */ | |
ff2aeb1e | 4802 | ap->prd[pi].flags_len = cpu_to_le32(0x8000); |
d26fc955 | 4803 | blen = 0x8000; |
ff2aeb1e | 4804 | ap->prd[++pi].addr = cpu_to_le32(addr + 0x8000); |
d26fc955 | 4805 | } |
ff2aeb1e TH |
4806 | ap->prd[pi].flags_len = cpu_to_le32(blen); |
4807 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); | |
d26fc955 | 4808 | |
ff2aeb1e | 4809 | pi++; |
d26fc955 AC |
4810 | sg_len -= len; |
4811 | addr += len; | |
4812 | } | |
4813 | } | |
4814 | ||
ff2aeb1e | 4815 | ap->prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
d26fc955 AC |
4816 | } |
4817 | ||
1da177e4 LT |
4818 | /** |
4819 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
4820 | * @qc: Metadata associated with taskfile to check | |
4821 | * | |
780a87f7 JG |
4822 | * Allow low-level driver to filter ATA PACKET commands, returning |
4823 | * a status indicating whether or not it is OK to use DMA for the | |
4824 | * supplied PACKET command. | |
4825 | * | |
1da177e4 | 4826 | * LOCKING: |
cca3974e | 4827 | * spin_lock_irqsave(host lock) |
0cba632b | 4828 | * |
1da177e4 LT |
4829 | * RETURNS: 0 when ATAPI DMA can be used |
4830 | * nonzero otherwise | |
4831 | */ | |
4832 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
4833 | { | |
4834 | struct ata_port *ap = qc->ap; | |
b9a4197e TH |
4835 | |
4836 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a | |
4837 | * few ATAPI devices choke on such DMA requests. | |
4838 | */ | |
4839 | if (unlikely(qc->nbytes & 15)) | |
4840 | return 1; | |
6f23a31d | 4841 | |
1da177e4 | 4842 | if (ap->ops->check_atapi_dma) |
b9a4197e | 4843 | return ap->ops->check_atapi_dma(qc); |
1da177e4 | 4844 | |
b9a4197e | 4845 | return 0; |
1da177e4 | 4846 | } |
b9a4197e | 4847 | |
31cc23b3 TH |
4848 | /** |
4849 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4850 | * @qc: ATA command in question | |
4851 | * | |
4852 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4853 | * not. As upper layer only knows the queue depth, we are | |
4854 | * responsible for maintaining exclusion. This function checks | |
4855 | * whether a new command @qc can be issued. | |
4856 | * | |
4857 | * LOCKING: | |
4858 | * spin_lock_irqsave(host lock) | |
4859 | * | |
4860 | * RETURNS: | |
4861 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4862 | */ | |
4863 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4864 | { | |
4865 | struct ata_link *link = qc->dev->link; | |
4866 | ||
4867 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
4868 | if (!ata_tag_valid(link->active_tag)) | |
4869 | return 0; | |
4870 | } else { | |
4871 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4872 | return 0; | |
4873 | } | |
4874 | ||
4875 | return ATA_DEFER_LINK; | |
4876 | } | |
4877 | ||
1da177e4 LT |
4878 | /** |
4879 | * ata_qc_prep - Prepare taskfile for submission | |
4880 | * @qc: Metadata associated with taskfile to be prepared | |
4881 | * | |
780a87f7 JG |
4882 | * Prepare ATA taskfile for submission. |
4883 | * | |
1da177e4 | 4884 | * LOCKING: |
cca3974e | 4885 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4886 | */ |
4887 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
4888 | { | |
4889 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4890 | return; | |
4891 | ||
4892 | ata_fill_sg(qc); | |
4893 | } | |
4894 | ||
d26fc955 AC |
4895 | /** |
4896 | * ata_dumb_qc_prep - Prepare taskfile for submission | |
4897 | * @qc: Metadata associated with taskfile to be prepared | |
4898 | * | |
4899 | * Prepare ATA taskfile for submission. | |
4900 | * | |
4901 | * LOCKING: | |
4902 | * spin_lock_irqsave(host lock) | |
4903 | */ | |
4904 | void ata_dumb_qc_prep(struct ata_queued_cmd *qc) | |
4905 | { | |
4906 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4907 | return; | |
4908 | ||
4909 | ata_fill_sg_dumb(qc); | |
4910 | } | |
4911 | ||
e46834cd BK |
4912 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
4913 | ||
0cba632b JG |
4914 | /** |
4915 | * ata_sg_init - Associate command with scatter-gather table. | |
4916 | * @qc: Command to be associated | |
4917 | * @sg: Scatter-gather table. | |
4918 | * @n_elem: Number of elements in s/g table. | |
4919 | * | |
4920 | * Initialize the data-related elements of queued_cmd @qc | |
4921 | * to point to a scatter-gather table @sg, containing @n_elem | |
4922 | * elements. | |
4923 | * | |
4924 | * LOCKING: | |
cca3974e | 4925 | * spin_lock_irqsave(host lock) |
0cba632b | 4926 | */ |
1da177e4 LT |
4927 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
4928 | unsigned int n_elem) | |
4929 | { | |
ff2aeb1e | 4930 | qc->sg = sg; |
1da177e4 | 4931 | qc->n_elem = n_elem; |
ff2aeb1e | 4932 | qc->cursg = qc->sg; |
1da177e4 LT |
4933 | } |
4934 | ||
ff2aeb1e TH |
4935 | /** |
4936 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. | |
4937 | * @qc: Command with scatter-gather table to be mapped. | |
4938 | * | |
4939 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
4940 | * | |
4941 | * LOCKING: | |
4942 | * spin_lock_irqsave(host lock) | |
4943 | * | |
4944 | * RETURNS: | |
4945 | * Zero on success, negative on error. | |
4946 | * | |
4947 | */ | |
4948 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4949 | { | |
4950 | struct ata_port *ap = qc->ap; | |
dde20207 | 4951 | unsigned int n_elem; |
ff2aeb1e TH |
4952 | |
4953 | VPRINTK("ENTER, ata%u\n", ap->print_id); | |
4954 | ||
dde20207 JB |
4955 | n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
4956 | if (n_elem < 1) | |
4957 | return -1; | |
ff2aeb1e | 4958 | |
dde20207 | 4959 | DPRINTK("%d sg elements mapped\n", n_elem); |
1da177e4 | 4960 | |
dde20207 | 4961 | qc->n_elem = n_elem; |
f92a2636 | 4962 | qc->flags |= ATA_QCFLAG_DMAMAP; |
1da177e4 LT |
4963 | |
4964 | return 0; | |
4965 | } | |
4966 | ||
0baab86b | 4967 | /** |
c893a3ae | 4968 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
4969 | * @buf: Buffer to swap |
4970 | * @buf_words: Number of 16-bit words in buffer. | |
4971 | * | |
4972 | * Swap halves of 16-bit words if needed to convert from | |
4973 | * little-endian byte order to native cpu byte order, or | |
4974 | * vice-versa. | |
4975 | * | |
4976 | * LOCKING: | |
6f0ef4fa | 4977 | * Inherited from caller. |
0baab86b | 4978 | */ |
1da177e4 LT |
4979 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
4980 | { | |
4981 | #ifdef __BIG_ENDIAN | |
4982 | unsigned int i; | |
4983 | ||
4984 | for (i = 0; i < buf_words; i++) | |
4985 | buf[i] = le16_to_cpu(buf[i]); | |
4986 | #endif /* __BIG_ENDIAN */ | |
4987 | } | |
4988 | ||
6ae4cfb5 | 4989 | /** |
0d5ff566 | 4990 | * ata_data_xfer - Transfer data by PIO |
55dba312 | 4991 | * @dev: device to target |
6ae4cfb5 AL |
4992 | * @buf: data buffer |
4993 | * @buflen: buffer length | |
0affa456 | 4994 | * @rw: read/write |
6ae4cfb5 AL |
4995 | * |
4996 | * Transfer data from/to the device data register by PIO. | |
4997 | * | |
4998 | * LOCKING: | |
4999 | * Inherited from caller. | |
55dba312 TH |
5000 | * |
5001 | * RETURNS: | |
5002 | * Bytes consumed. | |
6ae4cfb5 | 5003 | */ |
55dba312 TH |
5004 | unsigned int ata_data_xfer(struct ata_device *dev, unsigned char *buf, |
5005 | unsigned int buflen, int rw) | |
1da177e4 | 5006 | { |
55dba312 TH |
5007 | struct ata_port *ap = dev->link->ap; |
5008 | void __iomem *data_addr = ap->ioaddr.data_addr; | |
6ae4cfb5 | 5009 | unsigned int words = buflen >> 1; |
1da177e4 | 5010 | |
6ae4cfb5 | 5011 | /* Transfer multiple of 2 bytes */ |
55dba312 TH |
5012 | if (rw == READ) |
5013 | ioread16_rep(data_addr, buf, words); | |
1da177e4 | 5014 | else |
55dba312 | 5015 | iowrite16_rep(data_addr, buf, words); |
6ae4cfb5 AL |
5016 | |
5017 | /* Transfer trailing 1 byte, if any. */ | |
5018 | if (unlikely(buflen & 0x01)) { | |
4ca4e439 | 5019 | __le16 align_buf[1] = { 0 }; |
6ae4cfb5 AL |
5020 | unsigned char *trailing_buf = buf + buflen - 1; |
5021 | ||
55dba312 TH |
5022 | if (rw == READ) { |
5023 | align_buf[0] = cpu_to_le16(ioread16(data_addr)); | |
6ae4cfb5 | 5024 | memcpy(trailing_buf, align_buf, 1); |
55dba312 TH |
5025 | } else { |
5026 | memcpy(align_buf, trailing_buf, 1); | |
5027 | iowrite16(le16_to_cpu(align_buf[0]), data_addr); | |
6ae4cfb5 | 5028 | } |
55dba312 | 5029 | words++; |
6ae4cfb5 | 5030 | } |
55dba312 TH |
5031 | |
5032 | return words << 1; | |
1da177e4 LT |
5033 | } |
5034 | ||
75e99585 | 5035 | /** |
0d5ff566 | 5036 | * ata_data_xfer_noirq - Transfer data by PIO |
55dba312 | 5037 | * @dev: device to target |
75e99585 AC |
5038 | * @buf: data buffer |
5039 | * @buflen: buffer length | |
0affa456 | 5040 | * @rw: read/write |
75e99585 | 5041 | * |
88574551 | 5042 | * Transfer data from/to the device data register by PIO. Do the |
75e99585 AC |
5043 | * transfer with interrupts disabled. |
5044 | * | |
5045 | * LOCKING: | |
5046 | * Inherited from caller. | |
55dba312 TH |
5047 | * |
5048 | * RETURNS: | |
5049 | * Bytes consumed. | |
75e99585 | 5050 | */ |
55dba312 TH |
5051 | unsigned int ata_data_xfer_noirq(struct ata_device *dev, unsigned char *buf, |
5052 | unsigned int buflen, int rw) | |
75e99585 AC |
5053 | { |
5054 | unsigned long flags; | |
55dba312 TH |
5055 | unsigned int consumed; |
5056 | ||
75e99585 | 5057 | local_irq_save(flags); |
55dba312 | 5058 | consumed = ata_data_xfer(dev, buf, buflen, rw); |
75e99585 | 5059 | local_irq_restore(flags); |
55dba312 TH |
5060 | |
5061 | return consumed; | |
75e99585 AC |
5062 | } |
5063 | ||
5064 | ||
6ae4cfb5 | 5065 | /** |
5a5dbd18 | 5066 | * ata_pio_sector - Transfer a sector of data. |
6ae4cfb5 AL |
5067 | * @qc: Command on going |
5068 | * | |
5a5dbd18 | 5069 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
6ae4cfb5 AL |
5070 | * |
5071 | * LOCKING: | |
5072 | * Inherited from caller. | |
5073 | */ | |
5074 | ||
1da177e4 LT |
5075 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
5076 | { | |
5077 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
1da177e4 LT |
5078 | struct ata_port *ap = qc->ap; |
5079 | struct page *page; | |
5080 | unsigned int offset; | |
5081 | unsigned char *buf; | |
5082 | ||
5a5dbd18 | 5083 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
14be71f4 | 5084 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 | 5085 | |
45711f1a | 5086 | page = sg_page(qc->cursg); |
87260216 | 5087 | offset = qc->cursg->offset + qc->cursg_ofs; |
1da177e4 LT |
5088 | |
5089 | /* get the current page and offset */ | |
5090 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
5091 | offset %= PAGE_SIZE; | |
5092 | ||
1da177e4 LT |
5093 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
5094 | ||
91b8b313 AL |
5095 | if (PageHighMem(page)) { |
5096 | unsigned long flags; | |
5097 | ||
a6b2c5d4 | 5098 | /* FIXME: use a bounce buffer */ |
91b8b313 AL |
5099 | local_irq_save(flags); |
5100 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 5101 | |
91b8b313 | 5102 | /* do the actual data transfer */ |
5a5dbd18 | 5103 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
1da177e4 | 5104 | |
91b8b313 AL |
5105 | kunmap_atomic(buf, KM_IRQ0); |
5106 | local_irq_restore(flags); | |
5107 | } else { | |
5108 | buf = page_address(page); | |
5a5dbd18 | 5109 | ap->ops->data_xfer(qc->dev, buf + offset, qc->sect_size, do_write); |
91b8b313 | 5110 | } |
1da177e4 | 5111 | |
5a5dbd18 ML |
5112 | qc->curbytes += qc->sect_size; |
5113 | qc->cursg_ofs += qc->sect_size; | |
1da177e4 | 5114 | |
87260216 JA |
5115 | if (qc->cursg_ofs == qc->cursg->length) { |
5116 | qc->cursg = sg_next(qc->cursg); | |
1da177e4 LT |
5117 | qc->cursg_ofs = 0; |
5118 | } | |
1da177e4 | 5119 | } |
1da177e4 | 5120 | |
07f6f7d0 | 5121 | /** |
5a5dbd18 | 5122 | * ata_pio_sectors - Transfer one or many sectors. |
07f6f7d0 AL |
5123 | * @qc: Command on going |
5124 | * | |
5a5dbd18 | 5125 | * Transfer one or many sectors of data from/to the |
07f6f7d0 AL |
5126 | * ATA device for the DRQ request. |
5127 | * | |
5128 | * LOCKING: | |
5129 | * Inherited from caller. | |
5130 | */ | |
1da177e4 | 5131 | |
07f6f7d0 AL |
5132 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
5133 | { | |
5134 | if (is_multi_taskfile(&qc->tf)) { | |
5135 | /* READ/WRITE MULTIPLE */ | |
5136 | unsigned int nsect; | |
5137 | ||
587005de | 5138 | WARN_ON(qc->dev->multi_count == 0); |
1da177e4 | 5139 | |
5a5dbd18 | 5140 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
726f0785 | 5141 | qc->dev->multi_count); |
07f6f7d0 AL |
5142 | while (nsect--) |
5143 | ata_pio_sector(qc); | |
5144 | } else | |
5145 | ata_pio_sector(qc); | |
4cc980b3 AL |
5146 | |
5147 | ata_altstatus(qc->ap); /* flush */ | |
07f6f7d0 AL |
5148 | } |
5149 | ||
c71c1857 AL |
5150 | /** |
5151 | * atapi_send_cdb - Write CDB bytes to hardware | |
5152 | * @ap: Port to which ATAPI device is attached. | |
5153 | * @qc: Taskfile currently active | |
5154 | * | |
5155 | * When device has indicated its readiness to accept | |
5156 | * a CDB, this function is called. Send the CDB. | |
5157 | * | |
5158 | * LOCKING: | |
5159 | * caller. | |
5160 | */ | |
5161 | ||
5162 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
5163 | { | |
5164 | /* send SCSI cdb */ | |
5165 | DPRINTK("send cdb\n"); | |
db024d53 | 5166 | WARN_ON(qc->dev->cdb_len < 12); |
c71c1857 | 5167 | |
a6b2c5d4 | 5168 | ap->ops->data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
c71c1857 AL |
5169 | ata_altstatus(ap); /* flush */ |
5170 | ||
5171 | switch (qc->tf.protocol) { | |
0dc36888 | 5172 | case ATAPI_PROT_PIO: |
c71c1857 AL |
5173 | ap->hsm_task_state = HSM_ST; |
5174 | break; | |
0dc36888 | 5175 | case ATAPI_PROT_NODATA: |
c71c1857 AL |
5176 | ap->hsm_task_state = HSM_ST_LAST; |
5177 | break; | |
0dc36888 | 5178 | case ATAPI_PROT_DMA: |
c71c1857 AL |
5179 | ap->hsm_task_state = HSM_ST_LAST; |
5180 | /* initiate bmdma */ | |
5181 | ap->ops->bmdma_start(qc); | |
5182 | break; | |
5183 | } | |
1da177e4 LT |
5184 | } |
5185 | ||
6ae4cfb5 AL |
5186 | /** |
5187 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
5188 | * @qc: Command on going | |
5189 | * @bytes: number of bytes | |
5190 | * | |
5191 | * Transfer Transfer data from/to the ATAPI device. | |
5192 | * | |
5193 | * LOCKING: | |
5194 | * Inherited from caller. | |
5195 | * | |
5196 | */ | |
140b5e59 | 5197 | static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
1da177e4 | 5198 | { |
56c819df | 5199 | int rw = (qc->tf.flags & ATA_TFLAG_WRITE) ? WRITE : READ; |
1da177e4 | 5200 | struct ata_port *ap = qc->ap; |
56c819df TH |
5201 | struct ata_device *dev = qc->dev; |
5202 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
140b5e59 | 5203 | struct scatterlist *sg; |
1da177e4 LT |
5204 | struct page *page; |
5205 | unsigned char *buf; | |
56c819df | 5206 | unsigned int offset, count, consumed; |
1da177e4 LT |
5207 | |
5208 | next_sg: | |
140b5e59 TH |
5209 | sg = qc->cursg; |
5210 | if (unlikely(!sg)) { | |
fa2fc7f4 JB |
5211 | ata_ehi_push_desc(ehi, "unexpected or too much trailing data " |
5212 | "buf=%u cur=%u bytes=%u", | |
5213 | qc->nbytes, qc->curbytes, bytes); | |
5214 | return -1; | |
140b5e59 | 5215 | } |
1da177e4 | 5216 | |
45711f1a | 5217 | page = sg_page(sg); |
1da177e4 LT |
5218 | offset = sg->offset + qc->cursg_ofs; |
5219 | ||
5220 | /* get the current page and offset */ | |
5221 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
5222 | offset %= PAGE_SIZE; | |
5223 | ||
6952df03 | 5224 | /* don't overrun current sg */ |
32529e01 | 5225 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
5226 | |
5227 | /* don't cross page boundaries */ | |
5228 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
5229 | ||
7282aa4b AL |
5230 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
5231 | ||
91b8b313 AL |
5232 | if (PageHighMem(page)) { |
5233 | unsigned long flags; | |
5234 | ||
a6b2c5d4 | 5235 | /* FIXME: use bounce buffer */ |
91b8b313 AL |
5236 | local_irq_save(flags); |
5237 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 5238 | |
91b8b313 | 5239 | /* do the actual data transfer */ |
56c819df | 5240 | consumed = ap->ops->data_xfer(dev, buf + offset, count, rw); |
7282aa4b | 5241 | |
91b8b313 AL |
5242 | kunmap_atomic(buf, KM_IRQ0); |
5243 | local_irq_restore(flags); | |
5244 | } else { | |
5245 | buf = page_address(page); | |
56c819df | 5246 | consumed = ap->ops->data_xfer(dev, buf + offset, count, rw); |
91b8b313 | 5247 | } |
1da177e4 | 5248 | |
56c819df | 5249 | bytes -= min(bytes, consumed); |
1da177e4 LT |
5250 | qc->curbytes += count; |
5251 | qc->cursg_ofs += count; | |
5252 | ||
32529e01 | 5253 | if (qc->cursg_ofs == sg->length) { |
87260216 | 5254 | qc->cursg = sg_next(qc->cursg); |
1da177e4 LT |
5255 | qc->cursg_ofs = 0; |
5256 | } | |
5257 | ||
56c819df TH |
5258 | /* consumed can be larger than count only for the last transfer */ |
5259 | WARN_ON(qc->cursg && count != consumed); | |
5260 | ||
563a6e1f | 5261 | if (bytes) |
1da177e4 | 5262 | goto next_sg; |
140b5e59 | 5263 | return 0; |
1da177e4 LT |
5264 | } |
5265 | ||
6ae4cfb5 AL |
5266 | /** |
5267 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
5268 | * @qc: Command on going | |
5269 | * | |
5270 | * Transfer Transfer data from/to the ATAPI device. | |
5271 | * | |
5272 | * LOCKING: | |
5273 | * Inherited from caller. | |
6ae4cfb5 AL |
5274 | */ |
5275 | ||
1da177e4 LT |
5276 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
5277 | { | |
5278 | struct ata_port *ap = qc->ap; | |
5279 | struct ata_device *dev = qc->dev; | |
56c819df | 5280 | struct ata_eh_info *ehi = &dev->link->eh_info; |
1da177e4 LT |
5281 | unsigned int ireason, bc_lo, bc_hi, bytes; |
5282 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
5283 | ||
eec4c3f3 AL |
5284 | /* Abuse qc->result_tf for temp storage of intermediate TF |
5285 | * here to save some kernel stack usage. | |
5286 | * For normal completion, qc->result_tf is not relevant. For | |
5287 | * error, qc->result_tf is later overwritten by ata_qc_complete(). | |
5288 | * So, the correctness of qc->result_tf is not affected. | |
5289 | */ | |
5290 | ap->ops->tf_read(ap, &qc->result_tf); | |
5291 | ireason = qc->result_tf.nsect; | |
5292 | bc_lo = qc->result_tf.lbam; | |
5293 | bc_hi = qc->result_tf.lbah; | |
1da177e4 LT |
5294 | bytes = (bc_hi << 8) | bc_lo; |
5295 | ||
5296 | /* shall be cleared to zero, indicating xfer of data */ | |
0106372d | 5297 | if (unlikely(ireason & (1 << 0))) |
56c819df | 5298 | goto atapi_check; |
1da177e4 LT |
5299 | |
5300 | /* make sure transfer direction matches expected */ | |
5301 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
0106372d | 5302 | if (unlikely(do_write != i_write)) |
56c819df | 5303 | goto atapi_check; |
0106372d AL |
5304 | |
5305 | if (unlikely(!bytes)) | |
56c819df | 5306 | goto atapi_check; |
1da177e4 | 5307 | |
44877b4e | 5308 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
312f7da2 | 5309 | |
56c819df | 5310 | if (unlikely(__atapi_pio_bytes(qc, bytes))) |
140b5e59 | 5311 | goto err_out; |
4cc980b3 | 5312 | ata_altstatus(ap); /* flush */ |
1da177e4 LT |
5313 | |
5314 | return; | |
5315 | ||
56c819df TH |
5316 | atapi_check: |
5317 | ata_ehi_push_desc(ehi, "ATAPI check failed (ireason=0x%x bytes=%u)", | |
5318 | ireason, bytes); | |
5319 | err_out: | |
11a56d24 | 5320 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 5321 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
5322 | } |
5323 | ||
5324 | /** | |
c234fb00 AL |
5325 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
5326 | * @ap: the target ata_port | |
5327 | * @qc: qc on going | |
1da177e4 | 5328 | * |
c234fb00 AL |
5329 | * RETURNS: |
5330 | * 1 if ok in workqueue, 0 otherwise. | |
1da177e4 | 5331 | */ |
c234fb00 AL |
5332 | |
5333 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) | |
1da177e4 | 5334 | { |
c234fb00 AL |
5335 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
5336 | return 1; | |
1da177e4 | 5337 | |
c234fb00 AL |
5338 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
5339 | if (qc->tf.protocol == ATA_PROT_PIO && | |
5340 | (qc->tf.flags & ATA_TFLAG_WRITE)) | |
5341 | return 1; | |
1da177e4 | 5342 | |
405e66b3 | 5343 | if (ata_is_atapi(qc->tf.protocol) && |
c234fb00 AL |
5344 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
5345 | return 1; | |
fe79e683 AL |
5346 | } |
5347 | ||
c234fb00 AL |
5348 | return 0; |
5349 | } | |
1da177e4 | 5350 | |
c17ea20d TH |
5351 | /** |
5352 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
5353 | * @qc: Command to complete | |
5354 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5355 | * | |
5356 | * Finish @qc which is running on standard HSM. | |
5357 | * | |
5358 | * LOCKING: | |
cca3974e | 5359 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
c17ea20d TH |
5360 | * Otherwise, none on entry and grabs host lock. |
5361 | */ | |
5362 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
5363 | { | |
5364 | struct ata_port *ap = qc->ap; | |
5365 | unsigned long flags; | |
5366 | ||
5367 | if (ap->ops->error_handler) { | |
5368 | if (in_wq) { | |
ba6a1308 | 5369 | spin_lock_irqsave(ap->lock, flags); |
c17ea20d | 5370 | |
cca3974e JG |
5371 | /* EH might have kicked in while host lock is |
5372 | * released. | |
c17ea20d TH |
5373 | */ |
5374 | qc = ata_qc_from_tag(ap, qc->tag); | |
5375 | if (qc) { | |
5376 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
83625006 | 5377 | ap->ops->irq_on(ap); |
c17ea20d TH |
5378 | ata_qc_complete(qc); |
5379 | } else | |
5380 | ata_port_freeze(ap); | |
5381 | } | |
5382 | ||
ba6a1308 | 5383 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5384 | } else { |
5385 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
5386 | ata_qc_complete(qc); | |
5387 | else | |
5388 | ata_port_freeze(ap); | |
5389 | } | |
5390 | } else { | |
5391 | if (in_wq) { | |
ba6a1308 | 5392 | spin_lock_irqsave(ap->lock, flags); |
83625006 | 5393 | ap->ops->irq_on(ap); |
c17ea20d | 5394 | ata_qc_complete(qc); |
ba6a1308 | 5395 | spin_unlock_irqrestore(ap->lock, flags); |
c17ea20d TH |
5396 | } else |
5397 | ata_qc_complete(qc); | |
5398 | } | |
5399 | } | |
5400 | ||
bb5cb290 AL |
5401 | /** |
5402 | * ata_hsm_move - move the HSM to the next state. | |
5403 | * @ap: the target ata_port | |
5404 | * @qc: qc on going | |
5405 | * @status: current device status | |
5406 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
5407 | * | |
5408 | * RETURNS: | |
5409 | * 1 when poll next status needed, 0 otherwise. | |
5410 | */ | |
9a1004d0 TH |
5411 | int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
5412 | u8 status, int in_wq) | |
e2cec771 | 5413 | { |
bb5cb290 AL |
5414 | unsigned long flags = 0; |
5415 | int poll_next; | |
5416 | ||
6912ccd5 AL |
5417 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
5418 | ||
bb5cb290 AL |
5419 | /* Make sure ata_qc_issue_prot() does not throw things |
5420 | * like DMA polling into the workqueue. Notice that | |
5421 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
5422 | */ | |
c234fb00 | 5423 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
bb5cb290 | 5424 | |
e2cec771 | 5425 | fsm_start: |
999bb6f4 | 5426 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
44877b4e | 5427 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
999bb6f4 | 5428 | |
e2cec771 AL |
5429 | switch (ap->hsm_task_state) { |
5430 | case HSM_ST_FIRST: | |
bb5cb290 AL |
5431 | /* Send first data block or PACKET CDB */ |
5432 | ||
5433 | /* If polling, we will stay in the work queue after | |
5434 | * sending the data. Otherwise, interrupt handler | |
5435 | * takes over after sending the data. | |
5436 | */ | |
5437 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
5438 | ||
e2cec771 | 5439 | /* check device status */ |
3655d1d3 AL |
5440 | if (unlikely((status & ATA_DRQ) == 0)) { |
5441 | /* handle BSY=0, DRQ=0 as error */ | |
5442 | if (likely(status & (ATA_ERR | ATA_DF))) | |
5443 | /* device stops HSM for abort/error */ | |
5444 | qc->err_mask |= AC_ERR_DEV; | |
5445 | else | |
5446 | /* HSM violation. Let EH handle this */ | |
5447 | qc->err_mask |= AC_ERR_HSM; | |
5448 | ||
14be71f4 | 5449 | ap->hsm_task_state = HSM_ST_ERR; |
e2cec771 | 5450 | goto fsm_start; |
1da177e4 LT |
5451 | } |
5452 | ||
71601958 AL |
5453 | /* Device should not ask for data transfer (DRQ=1) |
5454 | * when it finds something wrong. | |
eee6c32f AL |
5455 | * We ignore DRQ here and stop the HSM by |
5456 | * changing hsm_task_state to HSM_ST_ERR and | |
5457 | * let the EH abort the command or reset the device. | |
71601958 AL |
5458 | */ |
5459 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
2d3b8eea AL |
5460 | /* Some ATAPI tape drives forget to clear the ERR bit |
5461 | * when doing the next command (mostly request sense). | |
5462 | * We ignore ERR here to workaround and proceed sending | |
5463 | * the CDB. | |
5464 | */ | |
5465 | if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) { | |
5466 | ata_port_printk(ap, KERN_WARNING, | |
5467 | "DRQ=1 with device error, " | |
5468 | "dev_stat 0x%X\n", status); | |
5469 | qc->err_mask |= AC_ERR_HSM; | |
5470 | ap->hsm_task_state = HSM_ST_ERR; | |
5471 | goto fsm_start; | |
5472 | } | |
71601958 | 5473 | } |
1da177e4 | 5474 | |
bb5cb290 AL |
5475 | /* Send the CDB (atapi) or the first data block (ata pio out). |
5476 | * During the state transition, interrupt handler shouldn't | |
5477 | * be invoked before the data transfer is complete and | |
5478 | * hsm_task_state is changed. Hence, the following locking. | |
5479 | */ | |
5480 | if (in_wq) | |
ba6a1308 | 5481 | spin_lock_irqsave(ap->lock, flags); |
1da177e4 | 5482 | |
bb5cb290 AL |
5483 | if (qc->tf.protocol == ATA_PROT_PIO) { |
5484 | /* PIO data out protocol. | |
5485 | * send first data block. | |
5486 | */ | |
0565c26d | 5487 | |
bb5cb290 AL |
5488 | /* ata_pio_sectors() might change the state |
5489 | * to HSM_ST_LAST. so, the state is changed here | |
5490 | * before ata_pio_sectors(). | |
5491 | */ | |
5492 | ap->hsm_task_state = HSM_ST; | |
5493 | ata_pio_sectors(qc); | |
bb5cb290 AL |
5494 | } else |
5495 | /* send CDB */ | |
5496 | atapi_send_cdb(ap, qc); | |
5497 | ||
5498 | if (in_wq) | |
ba6a1308 | 5499 | spin_unlock_irqrestore(ap->lock, flags); |
bb5cb290 AL |
5500 | |
5501 | /* if polling, ata_pio_task() handles the rest. | |
5502 | * otherwise, interrupt handler takes over from here. | |
5503 | */ | |
e2cec771 | 5504 | break; |
1c848984 | 5505 | |
e2cec771 AL |
5506 | case HSM_ST: |
5507 | /* complete command or read/write the data register */ | |
0dc36888 | 5508 | if (qc->tf.protocol == ATAPI_PROT_PIO) { |
e2cec771 AL |
5509 | /* ATAPI PIO protocol */ |
5510 | if ((status & ATA_DRQ) == 0) { | |
3655d1d3 AL |
5511 | /* No more data to transfer or device error. |
5512 | * Device error will be tagged in HSM_ST_LAST. | |
5513 | */ | |
e2cec771 AL |
5514 | ap->hsm_task_state = HSM_ST_LAST; |
5515 | goto fsm_start; | |
5516 | } | |
1da177e4 | 5517 | |
71601958 AL |
5518 | /* Device should not ask for data transfer (DRQ=1) |
5519 | * when it finds something wrong. | |
eee6c32f AL |
5520 | * We ignore DRQ here and stop the HSM by |
5521 | * changing hsm_task_state to HSM_ST_ERR and | |
5522 | * let the EH abort the command or reset the device. | |
71601958 AL |
5523 | */ |
5524 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
44877b4e TH |
5525 | ata_port_printk(ap, KERN_WARNING, "DRQ=1 with " |
5526 | "device error, dev_stat 0x%X\n", | |
5527 | status); | |
3655d1d3 | 5528 | qc->err_mask |= AC_ERR_HSM; |
eee6c32f AL |
5529 | ap->hsm_task_state = HSM_ST_ERR; |
5530 | goto fsm_start; | |
71601958 | 5531 | } |
1da177e4 | 5532 | |
e2cec771 | 5533 | atapi_pio_bytes(qc); |
7fb6ec28 | 5534 | |
e2cec771 AL |
5535 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
5536 | /* bad ireason reported by device */ | |
5537 | goto fsm_start; | |
1da177e4 | 5538 | |
e2cec771 AL |
5539 | } else { |
5540 | /* ATA PIO protocol */ | |
5541 | if (unlikely((status & ATA_DRQ) == 0)) { | |
5542 | /* handle BSY=0, DRQ=0 as error */ | |
3655d1d3 AL |
5543 | if (likely(status & (ATA_ERR | ATA_DF))) |
5544 | /* device stops HSM for abort/error */ | |
5545 | qc->err_mask |= AC_ERR_DEV; | |
5546 | else | |
55a8e2c8 TH |
5547 | /* HSM violation. Let EH handle this. |
5548 | * Phantom devices also trigger this | |
5549 | * condition. Mark hint. | |
5550 | */ | |
5551 | qc->err_mask |= AC_ERR_HSM | | |
5552 | AC_ERR_NODEV_HINT; | |
3655d1d3 | 5553 | |
e2cec771 AL |
5554 | ap->hsm_task_state = HSM_ST_ERR; |
5555 | goto fsm_start; | |
5556 | } | |
1da177e4 | 5557 | |
eee6c32f AL |
5558 | /* For PIO reads, some devices may ask for |
5559 | * data transfer (DRQ=1) alone with ERR=1. | |
5560 | * We respect DRQ here and transfer one | |
5561 | * block of junk data before changing the | |
5562 | * hsm_task_state to HSM_ST_ERR. | |
5563 | * | |
5564 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
5565 | * sense since the data block has been | |
5566 | * transferred to the device. | |
71601958 AL |
5567 | */ |
5568 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
71601958 AL |
5569 | /* data might be corrputed */ |
5570 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
5571 | |
5572 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
5573 | ata_pio_sectors(qc); | |
eee6c32f AL |
5574 | status = ata_wait_idle(ap); |
5575 | } | |
5576 | ||
3655d1d3 AL |
5577 | if (status & (ATA_BUSY | ATA_DRQ)) |
5578 | qc->err_mask |= AC_ERR_HSM; | |
5579 | ||
eee6c32f AL |
5580 | /* ata_pio_sectors() might change the |
5581 | * state to HSM_ST_LAST. so, the state | |
5582 | * is changed after ata_pio_sectors(). | |
5583 | */ | |
5584 | ap->hsm_task_state = HSM_ST_ERR; | |
5585 | goto fsm_start; | |
71601958 AL |
5586 | } |
5587 | ||
e2cec771 AL |
5588 | ata_pio_sectors(qc); |
5589 | ||
5590 | if (ap->hsm_task_state == HSM_ST_LAST && | |
5591 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
5592 | /* all data read */ | |
52a32205 | 5593 | status = ata_wait_idle(ap); |
e2cec771 AL |
5594 | goto fsm_start; |
5595 | } | |
5596 | } | |
5597 | ||
bb5cb290 | 5598 | poll_next = 1; |
1da177e4 LT |
5599 | break; |
5600 | ||
14be71f4 | 5601 | case HSM_ST_LAST: |
6912ccd5 AL |
5602 | if (unlikely(!ata_ok(status))) { |
5603 | qc->err_mask |= __ac_err_mask(status); | |
e2cec771 AL |
5604 | ap->hsm_task_state = HSM_ST_ERR; |
5605 | goto fsm_start; | |
5606 | } | |
5607 | ||
5608 | /* no more data to transfer */ | |
4332a771 | 5609 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
44877b4e | 5610 | ap->print_id, qc->dev->devno, status); |
e2cec771 | 5611 | |
6912ccd5 AL |
5612 | WARN_ON(qc->err_mask); |
5613 | ||
e2cec771 | 5614 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 5615 | |
e2cec771 | 5616 | /* complete taskfile transaction */ |
c17ea20d | 5617 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5618 | |
5619 | poll_next = 0; | |
1da177e4 LT |
5620 | break; |
5621 | ||
14be71f4 | 5622 | case HSM_ST_ERR: |
e2cec771 AL |
5623 | /* make sure qc->err_mask is available to |
5624 | * know what's wrong and recover | |
5625 | */ | |
5626 | WARN_ON(qc->err_mask == 0); | |
5627 | ||
5628 | ap->hsm_task_state = HSM_ST_IDLE; | |
bb5cb290 | 5629 | |
999bb6f4 | 5630 | /* complete taskfile transaction */ |
c17ea20d | 5631 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
5632 | |
5633 | poll_next = 0; | |
e2cec771 AL |
5634 | break; |
5635 | default: | |
bb5cb290 | 5636 | poll_next = 0; |
6912ccd5 | 5637 | BUG(); |
1da177e4 LT |
5638 | } |
5639 | ||
bb5cb290 | 5640 | return poll_next; |
1da177e4 LT |
5641 | } |
5642 | ||
65f27f38 | 5643 | static void ata_pio_task(struct work_struct *work) |
8061f5f0 | 5644 | { |
65f27f38 DH |
5645 | struct ata_port *ap = |
5646 | container_of(work, struct ata_port, port_task.work); | |
5647 | struct ata_queued_cmd *qc = ap->port_task_data; | |
8061f5f0 | 5648 | u8 status; |
a1af3734 | 5649 | int poll_next; |
8061f5f0 | 5650 | |
7fb6ec28 | 5651 | fsm_start: |
a1af3734 | 5652 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
8061f5f0 | 5653 | |
a1af3734 AL |
5654 | /* |
5655 | * This is purely heuristic. This is a fast path. | |
5656 | * Sometimes when we enter, BSY will be cleared in | |
5657 | * a chk-status or two. If not, the drive is probably seeking | |
5658 | * or something. Snooze for a couple msecs, then | |
5659 | * chk-status again. If still busy, queue delayed work. | |
5660 | */ | |
5661 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
5662 | if (status & ATA_BUSY) { | |
5663 | msleep(2); | |
5664 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
5665 | if (status & ATA_BUSY) { | |
442eacc3 | 5666 | ata_pio_queue_task(ap, qc, ATA_SHORT_PAUSE); |
a1af3734 AL |
5667 | return; |
5668 | } | |
8061f5f0 TH |
5669 | } |
5670 | ||
a1af3734 AL |
5671 | /* move the HSM */ |
5672 | poll_next = ata_hsm_move(ap, qc, status, 1); | |
8061f5f0 | 5673 | |
a1af3734 AL |
5674 | /* another command or interrupt handler |
5675 | * may be running at this point. | |
5676 | */ | |
5677 | if (poll_next) | |
7fb6ec28 | 5678 | goto fsm_start; |
8061f5f0 TH |
5679 | } |
5680 | ||
1da177e4 LT |
5681 | /** |
5682 | * ata_qc_new - Request an available ATA command, for queueing | |
5683 | * @ap: Port associated with device @dev | |
5684 | * @dev: Device from whom we request an available command structure | |
5685 | * | |
5686 | * LOCKING: | |
0cba632b | 5687 | * None. |
1da177e4 LT |
5688 | */ |
5689 | ||
5690 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
5691 | { | |
5692 | struct ata_queued_cmd *qc = NULL; | |
5693 | unsigned int i; | |
5694 | ||
e3180499 | 5695 | /* no command while frozen */ |
b51e9e5d | 5696 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
e3180499 TH |
5697 | return NULL; |
5698 | ||
2ab7db1f TH |
5699 | /* the last tag is reserved for internal command. */ |
5700 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
6cec4a39 | 5701 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
f69499f4 | 5702 | qc = __ata_qc_from_tag(ap, i); |
1da177e4 LT |
5703 | break; |
5704 | } | |
5705 | ||
5706 | if (qc) | |
5707 | qc->tag = i; | |
5708 | ||
5709 | return qc; | |
5710 | } | |
5711 | ||
5712 | /** | |
5713 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
5714 | * @dev: Device from whom we request an available command structure |
5715 | * | |
5716 | * LOCKING: | |
0cba632b | 5717 | * None. |
1da177e4 LT |
5718 | */ |
5719 | ||
3373efd8 | 5720 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 5721 | { |
9af5c9c9 | 5722 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
5723 | struct ata_queued_cmd *qc; |
5724 | ||
5725 | qc = ata_qc_new(ap); | |
5726 | if (qc) { | |
1da177e4 LT |
5727 | qc->scsicmd = NULL; |
5728 | qc->ap = ap; | |
5729 | qc->dev = dev; | |
1da177e4 | 5730 | |
2c13b7ce | 5731 | ata_qc_reinit(qc); |
1da177e4 LT |
5732 | } |
5733 | ||
5734 | return qc; | |
5735 | } | |
5736 | ||
1da177e4 LT |
5737 | /** |
5738 | * ata_qc_free - free unused ata_queued_cmd | |
5739 | * @qc: Command to complete | |
5740 | * | |
5741 | * Designed to free unused ata_queued_cmd object | |
5742 | * in case something prevents using it. | |
5743 | * | |
5744 | * LOCKING: | |
cca3974e | 5745 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
5746 | */ |
5747 | void ata_qc_free(struct ata_queued_cmd *qc) | |
5748 | { | |
4ba946e9 TH |
5749 | struct ata_port *ap = qc->ap; |
5750 | unsigned int tag; | |
5751 | ||
a4631474 | 5752 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 5753 | |
4ba946e9 TH |
5754 | qc->flags = 0; |
5755 | tag = qc->tag; | |
5756 | if (likely(ata_tag_valid(tag))) { | |
4ba946e9 | 5757 | qc->tag = ATA_TAG_POISON; |
6cec4a39 | 5758 | clear_bit(tag, &ap->qc_allocated); |
4ba946e9 | 5759 | } |
1da177e4 LT |
5760 | } |
5761 | ||
76014427 | 5762 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 5763 | { |
dedaf2b0 | 5764 | struct ata_port *ap = qc->ap; |
9af5c9c9 | 5765 | struct ata_link *link = qc->dev->link; |
dedaf2b0 | 5766 | |
a4631474 TH |
5767 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
5768 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
5769 | |
5770 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
5771 | ata_sg_clean(qc); | |
5772 | ||
7401abf2 | 5773 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 5774 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 5775 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
5776 | if (!link->sactive) |
5777 | ap->nr_active_links--; | |
5778 | } else { | |
9af5c9c9 | 5779 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
5780 | ap->nr_active_links--; |
5781 | } | |
5782 | ||
5783 | /* clear exclusive status */ | |
5784 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
5785 | ap->excl_link == link)) | |
5786 | ap->excl_link = NULL; | |
7401abf2 | 5787 | |
3f3791d3 AL |
5788 | /* atapi: mark qc as inactive to prevent the interrupt handler |
5789 | * from completing the command twice later, before the error handler | |
5790 | * is called. (when rc != 0 and atapi request sense is needed) | |
5791 | */ | |
5792 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 5793 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 5794 | |
1da177e4 | 5795 | /* call completion callback */ |
77853bf2 | 5796 | qc->complete_fn(qc); |
1da177e4 LT |
5797 | } |
5798 | ||
39599a53 TH |
5799 | static void fill_result_tf(struct ata_queued_cmd *qc) |
5800 | { | |
5801 | struct ata_port *ap = qc->ap; | |
5802 | ||
39599a53 | 5803 | qc->result_tf.flags = qc->tf.flags; |
4742d54f | 5804 | ap->ops->tf_read(ap, &qc->result_tf); |
39599a53 TH |
5805 | } |
5806 | ||
00115e0f TH |
5807 | static void ata_verify_xfer(struct ata_queued_cmd *qc) |
5808 | { | |
5809 | struct ata_device *dev = qc->dev; | |
5810 | ||
5811 | if (ata_tag_internal(qc->tag)) | |
5812 | return; | |
5813 | ||
5814 | if (ata_is_nodata(qc->tf.protocol)) | |
5815 | return; | |
5816 | ||
5817 | if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) | |
5818 | return; | |
5819 | ||
5820 | dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; | |
5821 | } | |
5822 | ||
f686bcb8 TH |
5823 | /** |
5824 | * ata_qc_complete - Complete an active ATA command | |
5825 | * @qc: Command to complete | |
5826 | * @err_mask: ATA Status register contents | |
5827 | * | |
5828 | * Indicate to the mid and upper layers that an ATA | |
5829 | * command has completed, with either an ok or not-ok status. | |
5830 | * | |
5831 | * LOCKING: | |
cca3974e | 5832 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
5833 | */ |
5834 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
5835 | { | |
5836 | struct ata_port *ap = qc->ap; | |
5837 | ||
5838 | /* XXX: New EH and old EH use different mechanisms to | |
5839 | * synchronize EH with regular execution path. | |
5840 | * | |
5841 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
5842 | * Normal execution path is responsible for not accessing a | |
5843 | * failed qc. libata core enforces the rule by returning NULL | |
5844 | * from ata_qc_from_tag() for failed qcs. | |
5845 | * | |
5846 | * Old EH depends on ata_qc_complete() nullifying completion | |
5847 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
5848 | * not synchronize with interrupt handler. Only PIO task is | |
5849 | * taken care of. | |
5850 | */ | |
5851 | if (ap->ops->error_handler) { | |
4dbfa39b TH |
5852 | struct ata_device *dev = qc->dev; |
5853 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
5854 | ||
b51e9e5d | 5855 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
f686bcb8 TH |
5856 | |
5857 | if (unlikely(qc->err_mask)) | |
5858 | qc->flags |= ATA_QCFLAG_FAILED; | |
5859 | ||
5860 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
5861 | if (!ata_tag_internal(qc->tag)) { | |
5862 | /* always fill result TF for failed qc */ | |
39599a53 | 5863 | fill_result_tf(qc); |
f686bcb8 TH |
5864 | ata_qc_schedule_eh(qc); |
5865 | return; | |
5866 | } | |
5867 | } | |
5868 | ||
5869 | /* read result TF if requested */ | |
5870 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5871 | fill_result_tf(qc); |
f686bcb8 | 5872 | |
4dbfa39b TH |
5873 | /* Some commands need post-processing after successful |
5874 | * completion. | |
5875 | */ | |
5876 | switch (qc->tf.command) { | |
5877 | case ATA_CMD_SET_FEATURES: | |
5878 | if (qc->tf.feature != SETFEATURES_WC_ON && | |
5879 | qc->tf.feature != SETFEATURES_WC_OFF) | |
5880 | break; | |
5881 | /* fall through */ | |
5882 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ | |
5883 | case ATA_CMD_SET_MULTI: /* multi_count changed */ | |
5884 | /* revalidate device */ | |
5885 | ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; | |
5886 | ata_port_schedule_eh(ap); | |
5887 | break; | |
054a5fba TH |
5888 | |
5889 | case ATA_CMD_SLEEP: | |
5890 | dev->flags |= ATA_DFLAG_SLEEPING; | |
5891 | break; | |
4dbfa39b TH |
5892 | } |
5893 | ||
00115e0f TH |
5894 | if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
5895 | ata_verify_xfer(qc); | |
5896 | ||
f686bcb8 TH |
5897 | __ata_qc_complete(qc); |
5898 | } else { | |
5899 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
5900 | return; | |
5901 | ||
5902 | /* read result TF if failed or requested */ | |
5903 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 5904 | fill_result_tf(qc); |
f686bcb8 TH |
5905 | |
5906 | __ata_qc_complete(qc); | |
5907 | } | |
5908 | } | |
5909 | ||
dedaf2b0 TH |
5910 | /** |
5911 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
5912 | * @ap: port in question | |
5913 | * @qc_active: new qc_active mask | |
5914 | * @finish_qc: LLDD callback invoked before completing a qc | |
5915 | * | |
5916 | * Complete in-flight commands. This functions is meant to be | |
5917 | * called from low-level driver's interrupt routine to complete | |
5918 | * requests normally. ap->qc_active and @qc_active is compared | |
5919 | * and commands are completed accordingly. | |
5920 | * | |
5921 | * LOCKING: | |
cca3974e | 5922 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
5923 | * |
5924 | * RETURNS: | |
5925 | * Number of completed commands on success, -errno otherwise. | |
5926 | */ | |
5927 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, | |
5928 | void (*finish_qc)(struct ata_queued_cmd *)) | |
5929 | { | |
5930 | int nr_done = 0; | |
5931 | u32 done_mask; | |
5932 | int i; | |
5933 | ||
5934 | done_mask = ap->qc_active ^ qc_active; | |
5935 | ||
5936 | if (unlikely(done_mask & qc_active)) { | |
5937 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
5938 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
5939 | return -EINVAL; | |
5940 | } | |
5941 | ||
5942 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
5943 | struct ata_queued_cmd *qc; | |
5944 | ||
5945 | if (!(done_mask & (1 << i))) | |
5946 | continue; | |
5947 | ||
5948 | if ((qc = ata_qc_from_tag(ap, i))) { | |
5949 | if (finish_qc) | |
5950 | finish_qc(qc); | |
5951 | ata_qc_complete(qc); | |
5952 | nr_done++; | |
5953 | } | |
5954 | } | |
5955 | ||
5956 | return nr_done; | |
5957 | } | |
5958 | ||
1da177e4 LT |
5959 | /** |
5960 | * ata_qc_issue - issue taskfile to device | |
5961 | * @qc: command to issue to device | |
5962 | * | |
5963 | * Prepare an ATA command to submission to device. | |
5964 | * This includes mapping the data into a DMA-able | |
5965 | * area, filling in the S/G table, and finally | |
5966 | * writing the taskfile to hardware, starting the command. | |
5967 | * | |
5968 | * LOCKING: | |
cca3974e | 5969 | * spin_lock_irqsave(host lock) |
1da177e4 | 5970 | */ |
8e0e694a | 5971 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
5972 | { |
5973 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 5974 | struct ata_link *link = qc->dev->link; |
405e66b3 | 5975 | u8 prot = qc->tf.protocol; |
1da177e4 | 5976 | |
dedaf2b0 TH |
5977 | /* Make sure only one non-NCQ command is outstanding. The |
5978 | * check is skipped for old EH because it reuses active qc to | |
5979 | * request ATAPI sense. | |
5980 | */ | |
9af5c9c9 | 5981 | WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 | 5982 | |
1973a023 | 5983 | if (ata_is_ncq(prot)) { |
9af5c9c9 | 5984 | WARN_ON(link->sactive & (1 << qc->tag)); |
da917d69 TH |
5985 | |
5986 | if (!link->sactive) | |
5987 | ap->nr_active_links++; | |
9af5c9c9 | 5988 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 5989 | } else { |
9af5c9c9 | 5990 | WARN_ON(link->sactive); |
da917d69 TH |
5991 | |
5992 | ap->nr_active_links++; | |
9af5c9c9 | 5993 | link->active_tag = qc->tag; |
dedaf2b0 TH |
5994 | } |
5995 | ||
e4a70e76 | 5996 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 5997 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 5998 | |
f92a2636 TH |
5999 | /* We guarantee to LLDs that they will have at least one |
6000 | * non-zero sg if the command is a data command. | |
6001 | */ | |
ff2aeb1e | 6002 | BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); |
f92a2636 | 6003 | |
405e66b3 | 6004 | if (ata_is_dma(prot) || (ata_is_pio(prot) && |
f92a2636 | 6005 | (ap->flags & ATA_FLAG_PIO_DMA))) |
001102d7 TH |
6006 | if (ata_sg_setup(qc)) |
6007 | goto sg_err; | |
1da177e4 | 6008 | |
054a5fba TH |
6009 | /* if device is sleeping, schedule softreset and abort the link */ |
6010 | if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { | |
6011 | link->eh_info.action |= ATA_EH_SOFTRESET; | |
6012 | ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); | |
6013 | ata_link_abort(link); | |
6014 | return; | |
6015 | } | |
6016 | ||
1da177e4 LT |
6017 | ap->ops->qc_prep(qc); |
6018 | ||
8e0e694a TH |
6019 | qc->err_mask |= ap->ops->qc_issue(qc); |
6020 | if (unlikely(qc->err_mask)) | |
6021 | goto err; | |
6022 | return; | |
1da177e4 | 6023 | |
8e436af9 | 6024 | sg_err: |
8e0e694a TH |
6025 | qc->err_mask |= AC_ERR_SYSTEM; |
6026 | err: | |
6027 | ata_qc_complete(qc); | |
1da177e4 LT |
6028 | } |
6029 | ||
6030 | /** | |
6031 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
6032 | * @qc: command to issue to device | |
6033 | * | |
6034 | * Using various libata functions and hooks, this function | |
6035 | * starts an ATA command. ATA commands are grouped into | |
6036 | * classes called "protocols", and issuing each type of protocol | |
6037 | * is slightly different. | |
6038 | * | |
0baab86b EF |
6039 | * May be used as the qc_issue() entry in ata_port_operations. |
6040 | * | |
1da177e4 | 6041 | * LOCKING: |
cca3974e | 6042 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
6043 | * |
6044 | * RETURNS: | |
9a3d9eb0 | 6045 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
6046 | */ |
6047 | ||
9a3d9eb0 | 6048 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
6049 | { |
6050 | struct ata_port *ap = qc->ap; | |
6051 | ||
e50362ec AL |
6052 | /* Use polling pio if the LLD doesn't handle |
6053 | * interrupt driven pio and atapi CDB interrupt. | |
6054 | */ | |
6055 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
6056 | switch (qc->tf.protocol) { | |
6057 | case ATA_PROT_PIO: | |
e3472cbe | 6058 | case ATA_PROT_NODATA: |
0dc36888 TH |
6059 | case ATAPI_PROT_PIO: |
6060 | case ATAPI_PROT_NODATA: | |
e50362ec AL |
6061 | qc->tf.flags |= ATA_TFLAG_POLLING; |
6062 | break; | |
0dc36888 | 6063 | case ATAPI_PROT_DMA: |
e50362ec | 6064 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) |
3a778275 | 6065 | /* see ata_dma_blacklisted() */ |
e50362ec AL |
6066 | BUG(); |
6067 | break; | |
6068 | default: | |
6069 | break; | |
6070 | } | |
6071 | } | |
6072 | ||
312f7da2 | 6073 | /* select the device */ |
1da177e4 LT |
6074 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
6075 | ||
312f7da2 | 6076 | /* start the command */ |
1da177e4 LT |
6077 | switch (qc->tf.protocol) { |
6078 | case ATA_PROT_NODATA: | |
312f7da2 AL |
6079 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
6080 | ata_qc_set_polling(qc); | |
6081 | ||
e5338254 | 6082 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 AL |
6083 | ap->hsm_task_state = HSM_ST_LAST; |
6084 | ||
6085 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
442eacc3 | 6086 | ata_pio_queue_task(ap, qc, 0); |
312f7da2 | 6087 | |
1da177e4 LT |
6088 | break; |
6089 | ||
6090 | case ATA_PROT_DMA: | |
587005de | 6091 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 6092 | |
1da177e4 LT |
6093 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
6094 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
6095 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
312f7da2 | 6096 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
6097 | break; |
6098 | ||
312f7da2 AL |
6099 | case ATA_PROT_PIO: |
6100 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
6101 | ata_qc_set_polling(qc); | |
1da177e4 | 6102 | |
e5338254 | 6103 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 | 6104 | |
54f00389 AL |
6105 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
6106 | /* PIO data out protocol */ | |
6107 | ap->hsm_task_state = HSM_ST_FIRST; | |
442eacc3 | 6108 | ata_pio_queue_task(ap, qc, 0); |
54f00389 AL |
6109 | |
6110 | /* always send first data block using | |
e27486db | 6111 | * the ata_pio_task() codepath. |
54f00389 | 6112 | */ |
312f7da2 | 6113 | } else { |
54f00389 AL |
6114 | /* PIO data in protocol */ |
6115 | ap->hsm_task_state = HSM_ST; | |
6116 | ||
6117 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
442eacc3 | 6118 | ata_pio_queue_task(ap, qc, 0); |
54f00389 AL |
6119 | |
6120 | /* if polling, ata_pio_task() handles the rest. | |
6121 | * otherwise, interrupt handler takes over from here. | |
6122 | */ | |
312f7da2 AL |
6123 | } |
6124 | ||
1da177e4 LT |
6125 | break; |
6126 | ||
0dc36888 TH |
6127 | case ATAPI_PROT_PIO: |
6128 | case ATAPI_PROT_NODATA: | |
312f7da2 AL |
6129 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
6130 | ata_qc_set_polling(qc); | |
6131 | ||
e5338254 | 6132 | ata_tf_to_host(ap, &qc->tf); |
f6ef65e6 | 6133 | |
312f7da2 AL |
6134 | ap->hsm_task_state = HSM_ST_FIRST; |
6135 | ||
6136 | /* send cdb by polling if no cdb interrupt */ | |
6137 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
6138 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
442eacc3 | 6139 | ata_pio_queue_task(ap, qc, 0); |
1da177e4 LT |
6140 | break; |
6141 | ||
0dc36888 | 6142 | case ATAPI_PROT_DMA: |
587005de | 6143 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 6144 | |
1da177e4 LT |
6145 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
6146 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
312f7da2 AL |
6147 | ap->hsm_task_state = HSM_ST_FIRST; |
6148 | ||
6149 | /* send cdb by polling if no cdb interrupt */ | |
6150 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
442eacc3 | 6151 | ata_pio_queue_task(ap, qc, 0); |
1da177e4 LT |
6152 | break; |
6153 | ||
6154 | default: | |
6155 | WARN_ON(1); | |
9a3d9eb0 | 6156 | return AC_ERR_SYSTEM; |
1da177e4 LT |
6157 | } |
6158 | ||
6159 | return 0; | |
6160 | } | |
6161 | ||
1da177e4 LT |
6162 | /** |
6163 | * ata_host_intr - Handle host interrupt for given (port, task) | |
6164 | * @ap: Port on which interrupt arrived (possibly...) | |
6165 | * @qc: Taskfile currently active in engine | |
6166 | * | |
6167 | * Handle host interrupt for given queued command. Currently, | |
6168 | * only DMA interrupts are handled. All other commands are | |
6169 | * handled via polling with interrupts disabled (nIEN bit). | |
6170 | * | |
6171 | * LOCKING: | |
cca3974e | 6172 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
6173 | * |
6174 | * RETURNS: | |
6175 | * One if interrupt was handled, zero if not (shared irq). | |
6176 | */ | |
6177 | ||
2dcb407e JG |
6178 | inline unsigned int ata_host_intr(struct ata_port *ap, |
6179 | struct ata_queued_cmd *qc) | |
1da177e4 | 6180 | { |
9af5c9c9 | 6181 | struct ata_eh_info *ehi = &ap->link.eh_info; |
312f7da2 | 6182 | u8 status, host_stat = 0; |
1da177e4 | 6183 | |
312f7da2 | 6184 | VPRINTK("ata%u: protocol %d task_state %d\n", |
44877b4e | 6185 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
1da177e4 | 6186 | |
312f7da2 AL |
6187 | /* Check whether we are expecting interrupt in this state */ |
6188 | switch (ap->hsm_task_state) { | |
6189 | case HSM_ST_FIRST: | |
6912ccd5 AL |
6190 | /* Some pre-ATAPI-4 devices assert INTRQ |
6191 | * at this state when ready to receive CDB. | |
6192 | */ | |
1da177e4 | 6193 | |
312f7da2 | 6194 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
405e66b3 TH |
6195 | * The flag was turned on only for atapi devices. No |
6196 | * need to check ata_is_atapi(qc->tf.protocol) again. | |
312f7da2 AL |
6197 | */ |
6198 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1da177e4 | 6199 | goto idle_irq; |
1da177e4 | 6200 | break; |
312f7da2 AL |
6201 | case HSM_ST_LAST: |
6202 | if (qc->tf.protocol == ATA_PROT_DMA || | |
0dc36888 | 6203 | qc->tf.protocol == ATAPI_PROT_DMA) { |
312f7da2 AL |
6204 | /* check status of DMA engine */ |
6205 | host_stat = ap->ops->bmdma_status(ap); | |
44877b4e TH |
6206 | VPRINTK("ata%u: host_stat 0x%X\n", |
6207 | ap->print_id, host_stat); | |
312f7da2 AL |
6208 | |
6209 | /* if it's not our irq... */ | |
6210 | if (!(host_stat & ATA_DMA_INTR)) | |
6211 | goto idle_irq; | |
6212 | ||
6213 | /* before we do anything else, clear DMA-Start bit */ | |
6214 | ap->ops->bmdma_stop(qc); | |
a4f16610 AL |
6215 | |
6216 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
6217 | /* error when transfering data to/from memory */ | |
6218 | qc->err_mask |= AC_ERR_HOST_BUS; | |
6219 | ap->hsm_task_state = HSM_ST_ERR; | |
6220 | } | |
312f7da2 AL |
6221 | } |
6222 | break; | |
6223 | case HSM_ST: | |
6224 | break; | |
1da177e4 LT |
6225 | default: |
6226 | goto idle_irq; | |
6227 | } | |
6228 | ||
312f7da2 AL |
6229 | /* check altstatus */ |
6230 | status = ata_altstatus(ap); | |
6231 | if (status & ATA_BUSY) | |
6232 | goto idle_irq; | |
1da177e4 | 6233 | |
312f7da2 AL |
6234 | /* check main status, clearing INTRQ */ |
6235 | status = ata_chk_status(ap); | |
6236 | if (unlikely(status & ATA_BUSY)) | |
6237 | goto idle_irq; | |
1da177e4 | 6238 | |
312f7da2 AL |
6239 | /* ack bmdma irq events */ |
6240 | ap->ops->irq_clear(ap); | |
1da177e4 | 6241 | |
bb5cb290 | 6242 | ata_hsm_move(ap, qc, status, 0); |
ea54763f TH |
6243 | |
6244 | if (unlikely(qc->err_mask) && (qc->tf.protocol == ATA_PROT_DMA || | |
0dc36888 | 6245 | qc->tf.protocol == ATAPI_PROT_DMA)) |
ea54763f TH |
6246 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); |
6247 | ||
1da177e4 LT |
6248 | return 1; /* irq handled */ |
6249 | ||
6250 | idle_irq: | |
6251 | ap->stats.idle_irq++; | |
6252 | ||
6253 | #ifdef ATA_IRQ_TRAP | |
6254 | if ((ap->stats.idle_irq % 1000) == 0) { | |
6d32d30f JG |
6255 | ata_chk_status(ap); |
6256 | ap->ops->irq_clear(ap); | |
f15a1daf | 6257 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
23cfce89 | 6258 | return 1; |
1da177e4 LT |
6259 | } |
6260 | #endif | |
6261 | return 0; /* irq not handled */ | |
6262 | } | |
6263 | ||
6264 | /** | |
6265 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b | 6266 | * @irq: irq line (unused) |
cca3974e | 6267 | * @dev_instance: pointer to our ata_host information structure |
1da177e4 | 6268 | * |
0cba632b JG |
6269 | * Default interrupt handler for PCI IDE devices. Calls |
6270 | * ata_host_intr() for each port that is not disabled. | |
6271 | * | |
1da177e4 | 6272 | * LOCKING: |
cca3974e | 6273 | * Obtains host lock during operation. |
1da177e4 LT |
6274 | * |
6275 | * RETURNS: | |
0cba632b | 6276 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
6277 | */ |
6278 | ||
2dcb407e | 6279 | irqreturn_t ata_interrupt(int irq, void *dev_instance) |
1da177e4 | 6280 | { |
cca3974e | 6281 | struct ata_host *host = dev_instance; |
1da177e4 LT |
6282 | unsigned int i; |
6283 | unsigned int handled = 0; | |
6284 | unsigned long flags; | |
6285 | ||
6286 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
cca3974e | 6287 | spin_lock_irqsave(&host->lock, flags); |
1da177e4 | 6288 | |
cca3974e | 6289 | for (i = 0; i < host->n_ports; i++) { |
1da177e4 LT |
6290 | struct ata_port *ap; |
6291 | ||
cca3974e | 6292 | ap = host->ports[i]; |
c1389503 | 6293 | if (ap && |
029f5468 | 6294 | !(ap->flags & ATA_FLAG_DISABLED)) { |
1da177e4 LT |
6295 | struct ata_queued_cmd *qc; |
6296 | ||
9af5c9c9 | 6297 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
312f7da2 | 6298 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
21b1ed74 | 6299 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
1da177e4 LT |
6300 | handled |= ata_host_intr(ap, qc); |
6301 | } | |
6302 | } | |
6303 | ||
cca3974e | 6304 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 LT |
6305 | |
6306 | return IRQ_RETVAL(handled); | |
6307 | } | |
6308 | ||
34bf2170 TH |
6309 | /** |
6310 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 6311 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 6312 | * |
936fd732 | 6313 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
6314 | * |
6315 | * LOCKING: | |
6316 | * None. | |
6317 | * | |
6318 | * RETURNS: | |
6319 | * 1 if SCRs are accessible, 0 otherwise. | |
6320 | */ | |
936fd732 | 6321 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 6322 | { |
936fd732 TH |
6323 | struct ata_port *ap = link->ap; |
6324 | ||
a16abc0b | 6325 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
6326 | } |
6327 | ||
6328 | /** | |
6329 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 6330 | * @link: ATA link to read SCR for |
34bf2170 TH |
6331 | * @reg: SCR to read |
6332 | * @val: Place to store read value | |
6333 | * | |
936fd732 | 6334 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
6335 | * guaranteed to succeed if @link is ap->link, the cable type of |
6336 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6337 | * |
6338 | * LOCKING: | |
633273a3 | 6339 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6340 | * |
6341 | * RETURNS: | |
6342 | * 0 on success, negative errno on failure. | |
6343 | */ | |
936fd732 | 6344 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 6345 | { |
633273a3 TH |
6346 | if (ata_is_host_link(link)) { |
6347 | struct ata_port *ap = link->ap; | |
936fd732 | 6348 | |
633273a3 TH |
6349 | if (sata_scr_valid(link)) |
6350 | return ap->ops->scr_read(ap, reg, val); | |
6351 | return -EOPNOTSUPP; | |
6352 | } | |
6353 | ||
6354 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
6355 | } |
6356 | ||
6357 | /** | |
6358 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 6359 | * @link: ATA link to write SCR for |
34bf2170 TH |
6360 | * @reg: SCR to write |
6361 | * @val: value to write | |
6362 | * | |
936fd732 | 6363 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
6364 | * guaranteed to succeed if @link is ap->link, the cable type of |
6365 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
6366 | * |
6367 | * LOCKING: | |
633273a3 | 6368 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6369 | * |
6370 | * RETURNS: | |
6371 | * 0 on success, negative errno on failure. | |
6372 | */ | |
936fd732 | 6373 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6374 | { |
633273a3 TH |
6375 | if (ata_is_host_link(link)) { |
6376 | struct ata_port *ap = link->ap; | |
6377 | ||
6378 | if (sata_scr_valid(link)) | |
6379 | return ap->ops->scr_write(ap, reg, val); | |
6380 | return -EOPNOTSUPP; | |
6381 | } | |
936fd732 | 6382 | |
633273a3 | 6383 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
6384 | } |
6385 | ||
6386 | /** | |
6387 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 6388 | * @link: ATA link to write SCR for |
34bf2170 TH |
6389 | * @reg: SCR to write |
6390 | * @val: value to write | |
6391 | * | |
6392 | * This function is identical to sata_scr_write() except that this | |
6393 | * function performs flush after writing to the register. | |
6394 | * | |
6395 | * LOCKING: | |
633273a3 | 6396 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
6397 | * |
6398 | * RETURNS: | |
6399 | * 0 on success, negative errno on failure. | |
6400 | */ | |
936fd732 | 6401 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 6402 | { |
633273a3 TH |
6403 | if (ata_is_host_link(link)) { |
6404 | struct ata_port *ap = link->ap; | |
6405 | int rc; | |
da3dbb17 | 6406 | |
633273a3 TH |
6407 | if (sata_scr_valid(link)) { |
6408 | rc = ap->ops->scr_write(ap, reg, val); | |
6409 | if (rc == 0) | |
6410 | rc = ap->ops->scr_read(ap, reg, &val); | |
6411 | return rc; | |
6412 | } | |
6413 | return -EOPNOTSUPP; | |
34bf2170 | 6414 | } |
633273a3 TH |
6415 | |
6416 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
6417 | } |
6418 | ||
6419 | /** | |
936fd732 TH |
6420 | * ata_link_online - test whether the given link is online |
6421 | * @link: ATA link to test | |
34bf2170 | 6422 | * |
936fd732 TH |
6423 | * Test whether @link is online. Note that this function returns |
6424 | * 0 if online status of @link cannot be obtained, so | |
6425 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6426 | * |
6427 | * LOCKING: | |
6428 | * None. | |
6429 | * | |
6430 | * RETURNS: | |
6431 | * 1 if the port online status is available and online. | |
6432 | */ | |
936fd732 | 6433 | int ata_link_online(struct ata_link *link) |
34bf2170 TH |
6434 | { |
6435 | u32 sstatus; | |
6436 | ||
936fd732 TH |
6437 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6438 | (sstatus & 0xf) == 0x3) | |
34bf2170 TH |
6439 | return 1; |
6440 | return 0; | |
6441 | } | |
6442 | ||
6443 | /** | |
936fd732 TH |
6444 | * ata_link_offline - test whether the given link is offline |
6445 | * @link: ATA link to test | |
34bf2170 | 6446 | * |
936fd732 TH |
6447 | * Test whether @link is offline. Note that this function |
6448 | * returns 0 if offline status of @link cannot be obtained, so | |
6449 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
6450 | * |
6451 | * LOCKING: | |
6452 | * None. | |
6453 | * | |
6454 | * RETURNS: | |
6455 | * 1 if the port offline status is available and offline. | |
6456 | */ | |
936fd732 | 6457 | int ata_link_offline(struct ata_link *link) |
34bf2170 TH |
6458 | { |
6459 | u32 sstatus; | |
6460 | ||
936fd732 TH |
6461 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
6462 | (sstatus & 0xf) != 0x3) | |
34bf2170 TH |
6463 | return 1; |
6464 | return 0; | |
6465 | } | |
0baab86b | 6466 | |
77b08fb5 | 6467 | int ata_flush_cache(struct ata_device *dev) |
9b847548 | 6468 | { |
977e6b9f | 6469 | unsigned int err_mask; |
9b847548 JA |
6470 | u8 cmd; |
6471 | ||
6472 | if (!ata_try_flush_cache(dev)) | |
6473 | return 0; | |
6474 | ||
6fc49adb | 6475 | if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
9b847548 JA |
6476 | cmd = ATA_CMD_FLUSH_EXT; |
6477 | else | |
6478 | cmd = ATA_CMD_FLUSH; | |
6479 | ||
4f34337b AC |
6480 | /* This is wrong. On a failed flush we get back the LBA of the lost |
6481 | sector and we should (assuming it wasn't aborted as unknown) issue | |
2dcb407e | 6482 | a further flush command to continue the writeback until it |
4f34337b | 6483 | does not error */ |
977e6b9f TH |
6484 | err_mask = ata_do_simple_cmd(dev, cmd); |
6485 | if (err_mask) { | |
6486 | ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); | |
6487 | return -EIO; | |
6488 | } | |
6489 | ||
6490 | return 0; | |
9b847548 JA |
6491 | } |
6492 | ||
6ffa01d8 | 6493 | #ifdef CONFIG_PM |
cca3974e JG |
6494 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
6495 | unsigned int action, unsigned int ehi_flags, | |
6496 | int wait) | |
500530f6 TH |
6497 | { |
6498 | unsigned long flags; | |
6499 | int i, rc; | |
6500 | ||
cca3974e JG |
6501 | for (i = 0; i < host->n_ports; i++) { |
6502 | struct ata_port *ap = host->ports[i]; | |
e3667ebf | 6503 | struct ata_link *link; |
500530f6 TH |
6504 | |
6505 | /* Previous resume operation might still be in | |
6506 | * progress. Wait for PM_PENDING to clear. | |
6507 | */ | |
6508 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
6509 | ata_port_wait_eh(ap); | |
6510 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6511 | } | |
6512 | ||
6513 | /* request PM ops to EH */ | |
6514 | spin_lock_irqsave(ap->lock, flags); | |
6515 | ||
6516 | ap->pm_mesg = mesg; | |
6517 | if (wait) { | |
6518 | rc = 0; | |
6519 | ap->pm_result = &rc; | |
6520 | } | |
6521 | ||
6522 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
e3667ebf TH |
6523 | __ata_port_for_each_link(link, ap) { |
6524 | link->eh_info.action |= action; | |
6525 | link->eh_info.flags |= ehi_flags; | |
6526 | } | |
500530f6 TH |
6527 | |
6528 | ata_port_schedule_eh(ap); | |
6529 | ||
6530 | spin_unlock_irqrestore(ap->lock, flags); | |
6531 | ||
6532 | /* wait and check result */ | |
6533 | if (wait) { | |
6534 | ata_port_wait_eh(ap); | |
6535 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
6536 | if (rc) | |
6537 | return rc; | |
6538 | } | |
6539 | } | |
6540 | ||
6541 | return 0; | |
6542 | } | |
6543 | ||
6544 | /** | |
cca3974e JG |
6545 | * ata_host_suspend - suspend host |
6546 | * @host: host to suspend | |
500530f6 TH |
6547 | * @mesg: PM message |
6548 | * | |
cca3974e | 6549 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
6550 | * function requests EH to perform PM operations and waits for EH |
6551 | * to finish. | |
6552 | * | |
6553 | * LOCKING: | |
6554 | * Kernel thread context (may sleep). | |
6555 | * | |
6556 | * RETURNS: | |
6557 | * 0 on success, -errno on failure. | |
6558 | */ | |
cca3974e | 6559 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 6560 | { |
9666f400 | 6561 | int rc; |
500530f6 | 6562 | |
ca77329f KCA |
6563 | /* |
6564 | * disable link pm on all ports before requesting | |
6565 | * any pm activity | |
6566 | */ | |
6567 | ata_lpm_enable(host); | |
6568 | ||
cca3974e | 6569 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
500530f6 TH |
6570 | return rc; |
6571 | } | |
6572 | ||
6573 | /** | |
cca3974e JG |
6574 | * ata_host_resume - resume host |
6575 | * @host: host to resume | |
500530f6 | 6576 | * |
cca3974e | 6577 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
6578 | * function requests EH to perform PM operations and returns. |
6579 | * Note that all resume operations are performed parallely. | |
6580 | * | |
6581 | * LOCKING: | |
6582 | * Kernel thread context (may sleep). | |
6583 | */ | |
cca3974e | 6584 | void ata_host_resume(struct ata_host *host) |
500530f6 | 6585 | { |
cca3974e JG |
6586 | ata_host_request_pm(host, PMSG_ON, ATA_EH_SOFTRESET, |
6587 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); | |
ca77329f KCA |
6588 | |
6589 | /* reenable link pm */ | |
6590 | ata_lpm_disable(host); | |
500530f6 | 6591 | } |
6ffa01d8 | 6592 | #endif |
500530f6 | 6593 | |
c893a3ae RD |
6594 | /** |
6595 | * ata_port_start - Set port up for dma. | |
6596 | * @ap: Port to initialize | |
6597 | * | |
6598 | * Called just after data structures for each port are | |
6599 | * initialized. Allocates space for PRD table. | |
6600 | * | |
6601 | * May be used as the port_start() entry in ata_port_operations. | |
6602 | * | |
6603 | * LOCKING: | |
6604 | * Inherited from caller. | |
6605 | */ | |
f0d36efd | 6606 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 6607 | { |
2f1f610b | 6608 | struct device *dev = ap->dev; |
1da177e4 | 6609 | |
f0d36efd TH |
6610 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
6611 | GFP_KERNEL); | |
1da177e4 LT |
6612 | if (!ap->prd) |
6613 | return -ENOMEM; | |
6614 | ||
1da177e4 LT |
6615 | return 0; |
6616 | } | |
6617 | ||
3ef3b43d TH |
6618 | /** |
6619 | * ata_dev_init - Initialize an ata_device structure | |
6620 | * @dev: Device structure to initialize | |
6621 | * | |
6622 | * Initialize @dev in preparation for probing. | |
6623 | * | |
6624 | * LOCKING: | |
6625 | * Inherited from caller. | |
6626 | */ | |
6627 | void ata_dev_init(struct ata_device *dev) | |
6628 | { | |
9af5c9c9 TH |
6629 | struct ata_link *link = dev->link; |
6630 | struct ata_port *ap = link->ap; | |
72fa4b74 TH |
6631 | unsigned long flags; |
6632 | ||
5a04bf4b | 6633 | /* SATA spd limit is bound to the first device */ |
9af5c9c9 TH |
6634 | link->sata_spd_limit = link->hw_sata_spd_limit; |
6635 | link->sata_spd = 0; | |
5a04bf4b | 6636 | |
72fa4b74 TH |
6637 | /* High bits of dev->flags are used to record warm plug |
6638 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 6639 | * host lock. |
72fa4b74 | 6640 | */ |
ba6a1308 | 6641 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 6642 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 6643 | dev->horkage = 0; |
ba6a1308 | 6644 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 6645 | |
72fa4b74 TH |
6646 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
6647 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
3ef3b43d TH |
6648 | dev->pio_mask = UINT_MAX; |
6649 | dev->mwdma_mask = UINT_MAX; | |
6650 | dev->udma_mask = UINT_MAX; | |
6651 | } | |
6652 | ||
4fb37a25 TH |
6653 | /** |
6654 | * ata_link_init - Initialize an ata_link structure | |
6655 | * @ap: ATA port link is attached to | |
6656 | * @link: Link structure to initialize | |
8989805d | 6657 | * @pmp: Port multiplier port number |
4fb37a25 TH |
6658 | * |
6659 | * Initialize @link. | |
6660 | * | |
6661 | * LOCKING: | |
6662 | * Kernel thread context (may sleep) | |
6663 | */ | |
fb7fd614 | 6664 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
6665 | { |
6666 | int i; | |
6667 | ||
6668 | /* clear everything except for devices */ | |
6669 | memset(link, 0, offsetof(struct ata_link, device[0])); | |
6670 | ||
6671 | link->ap = ap; | |
8989805d | 6672 | link->pmp = pmp; |
4fb37a25 TH |
6673 | link->active_tag = ATA_TAG_POISON; |
6674 | link->hw_sata_spd_limit = UINT_MAX; | |
6675 | ||
6676 | /* can't use iterator, ap isn't initialized yet */ | |
6677 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
6678 | struct ata_device *dev = &link->device[i]; | |
6679 | ||
6680 | dev->link = link; | |
6681 | dev->devno = dev - link->device; | |
6682 | ata_dev_init(dev); | |
6683 | } | |
6684 | } | |
6685 | ||
6686 | /** | |
6687 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
6688 | * @link: Link to configure sata_spd_limit for | |
6689 | * | |
6690 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
6691 | * configured value. | |
6692 | * | |
6693 | * LOCKING: | |
6694 | * Kernel thread context (may sleep). | |
6695 | * | |
6696 | * RETURNS: | |
6697 | * 0 on success, -errno on failure. | |
6698 | */ | |
fb7fd614 | 6699 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 | 6700 | { |
33267325 TH |
6701 | u32 scontrol; |
6702 | u8 spd; | |
4fb37a25 TH |
6703 | int rc; |
6704 | ||
6705 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
6706 | if (rc) | |
6707 | return rc; | |
6708 | ||
6709 | spd = (scontrol >> 4) & 0xf; | |
6710 | if (spd) | |
6711 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
6712 | ||
33267325 TH |
6713 | ata_force_spd_limit(link); |
6714 | ||
4fb37a25 TH |
6715 | link->sata_spd_limit = link->hw_sata_spd_limit; |
6716 | ||
6717 | return 0; | |
6718 | } | |
6719 | ||
1da177e4 | 6720 | /** |
f3187195 TH |
6721 | * ata_port_alloc - allocate and initialize basic ATA port resources |
6722 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 6723 | * |
f3187195 TH |
6724 | * Allocate and initialize basic ATA port resources. |
6725 | * | |
6726 | * RETURNS: | |
6727 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 6728 | * |
1da177e4 | 6729 | * LOCKING: |
f3187195 | 6730 | * Inherited from calling layer (may sleep). |
1da177e4 | 6731 | */ |
f3187195 | 6732 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 6733 | { |
f3187195 | 6734 | struct ata_port *ap; |
1da177e4 | 6735 | |
f3187195 TH |
6736 | DPRINTK("ENTER\n"); |
6737 | ||
6738 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
6739 | if (!ap) | |
6740 | return NULL; | |
6741 | ||
f4d6d004 | 6742 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
cca3974e | 6743 | ap->lock = &host->lock; |
198e0fed | 6744 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 6745 | ap->print_id = -1; |
1da177e4 | 6746 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 6747 | ap->host = host; |
f3187195 | 6748 | ap->dev = host->dev; |
1da177e4 | 6749 | ap->last_ctl = 0xFF; |
bd5d825c BP |
6750 | |
6751 | #if defined(ATA_VERBOSE_DEBUG) | |
6752 | /* turn on all debugging levels */ | |
6753 | ap->msg_enable = 0x00FF; | |
6754 | #elif defined(ATA_DEBUG) | |
6755 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 6756 | #else |
0dd4b21f | 6757 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 6758 | #endif |
1da177e4 | 6759 | |
442eacc3 | 6760 | INIT_DELAYED_WORK(&ap->port_task, ata_pio_task); |
65f27f38 DH |
6761 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
6762 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 6763 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 6764 | init_waitqueue_head(&ap->eh_wait_q); |
5ddf24c5 TH |
6765 | init_timer_deferrable(&ap->fastdrain_timer); |
6766 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
6767 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 6768 | |
838df628 | 6769 | ap->cbl = ATA_CBL_NONE; |
838df628 | 6770 | |
8989805d | 6771 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
6772 | |
6773 | #ifdef ATA_IRQ_TRAP | |
6774 | ap->stats.unhandled_irq = 1; | |
6775 | ap->stats.idle_irq = 1; | |
6776 | #endif | |
1da177e4 | 6777 | return ap; |
1da177e4 LT |
6778 | } |
6779 | ||
f0d36efd TH |
6780 | static void ata_host_release(struct device *gendev, void *res) |
6781 | { | |
6782 | struct ata_host *host = dev_get_drvdata(gendev); | |
6783 | int i; | |
6784 | ||
1aa506e4 TH |
6785 | for (i = 0; i < host->n_ports; i++) { |
6786 | struct ata_port *ap = host->ports[i]; | |
6787 | ||
4911487a TH |
6788 | if (!ap) |
6789 | continue; | |
6790 | ||
6791 | if (ap->scsi_host) | |
1aa506e4 TH |
6792 | scsi_host_put(ap->scsi_host); |
6793 | ||
633273a3 | 6794 | kfree(ap->pmp_link); |
4911487a | 6795 | kfree(ap); |
1aa506e4 TH |
6796 | host->ports[i] = NULL; |
6797 | } | |
6798 | ||
1aa56cca | 6799 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
6800 | } |
6801 | ||
f3187195 TH |
6802 | /** |
6803 | * ata_host_alloc - allocate and init basic ATA host resources | |
6804 | * @dev: generic device this host is associated with | |
6805 | * @max_ports: maximum number of ATA ports associated with this host | |
6806 | * | |
6807 | * Allocate and initialize basic ATA host resources. LLD calls | |
6808 | * this function to allocate a host, initializes it fully and | |
6809 | * attaches it using ata_host_register(). | |
6810 | * | |
6811 | * @max_ports ports are allocated and host->n_ports is | |
6812 | * initialized to @max_ports. The caller is allowed to decrease | |
6813 | * host->n_ports before calling ata_host_register(). The unused | |
6814 | * ports will be automatically freed on registration. | |
6815 | * | |
6816 | * RETURNS: | |
6817 | * Allocate ATA host on success, NULL on failure. | |
6818 | * | |
6819 | * LOCKING: | |
6820 | * Inherited from calling layer (may sleep). | |
6821 | */ | |
6822 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
6823 | { | |
6824 | struct ata_host *host; | |
6825 | size_t sz; | |
6826 | int i; | |
6827 | ||
6828 | DPRINTK("ENTER\n"); | |
6829 | ||
6830 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
6831 | return NULL; | |
6832 | ||
6833 | /* alloc a container for our list of ATA ports (buses) */ | |
6834 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
6835 | /* alloc a container for our list of ATA ports (buses) */ | |
6836 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
6837 | if (!host) | |
6838 | goto err_out; | |
6839 | ||
6840 | devres_add(dev, host); | |
6841 | dev_set_drvdata(dev, host); | |
6842 | ||
6843 | spin_lock_init(&host->lock); | |
6844 | host->dev = dev; | |
6845 | host->n_ports = max_ports; | |
6846 | ||
6847 | /* allocate ports bound to this host */ | |
6848 | for (i = 0; i < max_ports; i++) { | |
6849 | struct ata_port *ap; | |
6850 | ||
6851 | ap = ata_port_alloc(host); | |
6852 | if (!ap) | |
6853 | goto err_out; | |
6854 | ||
6855 | ap->port_no = i; | |
6856 | host->ports[i] = ap; | |
6857 | } | |
6858 | ||
6859 | devres_remove_group(dev, NULL); | |
6860 | return host; | |
6861 | ||
6862 | err_out: | |
6863 | devres_release_group(dev, NULL); | |
6864 | return NULL; | |
6865 | } | |
6866 | ||
f5cda257 TH |
6867 | /** |
6868 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
6869 | * @dev: generic device this host is associated with | |
6870 | * @ppi: array of ATA port_info to initialize host with | |
6871 | * @n_ports: number of ATA ports attached to this host | |
6872 | * | |
6873 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
6874 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
6875 | * last entry will be used for the remaining ports. | |
6876 | * | |
6877 | * RETURNS: | |
6878 | * Allocate ATA host on success, NULL on failure. | |
6879 | * | |
6880 | * LOCKING: | |
6881 | * Inherited from calling layer (may sleep). | |
6882 | */ | |
6883 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
6884 | const struct ata_port_info * const * ppi, | |
6885 | int n_ports) | |
6886 | { | |
6887 | const struct ata_port_info *pi; | |
6888 | struct ata_host *host; | |
6889 | int i, j; | |
6890 | ||
6891 | host = ata_host_alloc(dev, n_ports); | |
6892 | if (!host) | |
6893 | return NULL; | |
6894 | ||
6895 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
6896 | struct ata_port *ap = host->ports[i]; | |
6897 | ||
6898 | if (ppi[j]) | |
6899 | pi = ppi[j++]; | |
6900 | ||
6901 | ap->pio_mask = pi->pio_mask; | |
6902 | ap->mwdma_mask = pi->mwdma_mask; | |
6903 | ap->udma_mask = pi->udma_mask; | |
6904 | ap->flags |= pi->flags; | |
0c88758b | 6905 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
6906 | ap->ops = pi->port_ops; |
6907 | ||
6908 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
6909 | host->ops = pi->port_ops; | |
6910 | if (!host->private_data && pi->private_data) | |
6911 | host->private_data = pi->private_data; | |
6912 | } | |
6913 | ||
6914 | return host; | |
6915 | } | |
6916 | ||
32ebbc0c TH |
6917 | static void ata_host_stop(struct device *gendev, void *res) |
6918 | { | |
6919 | struct ata_host *host = dev_get_drvdata(gendev); | |
6920 | int i; | |
6921 | ||
6922 | WARN_ON(!(host->flags & ATA_HOST_STARTED)); | |
6923 | ||
6924 | for (i = 0; i < host->n_ports; i++) { | |
6925 | struct ata_port *ap = host->ports[i]; | |
6926 | ||
6927 | if (ap->ops->port_stop) | |
6928 | ap->ops->port_stop(ap); | |
6929 | } | |
6930 | ||
6931 | if (host->ops->host_stop) | |
6932 | host->ops->host_stop(host); | |
6933 | } | |
6934 | ||
ecef7253 TH |
6935 | /** |
6936 | * ata_host_start - start and freeze ports of an ATA host | |
6937 | * @host: ATA host to start ports for | |
6938 | * | |
6939 | * Start and then freeze ports of @host. Started status is | |
6940 | * recorded in host->flags, so this function can be called | |
6941 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
6942 | * once. If host->ops isn't initialized yet, its set to the |
6943 | * first non-dummy port ops. | |
ecef7253 TH |
6944 | * |
6945 | * LOCKING: | |
6946 | * Inherited from calling layer (may sleep). | |
6947 | * | |
6948 | * RETURNS: | |
6949 | * 0 if all ports are started successfully, -errno otherwise. | |
6950 | */ | |
6951 | int ata_host_start(struct ata_host *host) | |
6952 | { | |
32ebbc0c TH |
6953 | int have_stop = 0; |
6954 | void *start_dr = NULL; | |
ecef7253 TH |
6955 | int i, rc; |
6956 | ||
6957 | if (host->flags & ATA_HOST_STARTED) | |
6958 | return 0; | |
6959 | ||
6960 | for (i = 0; i < host->n_ports; i++) { | |
6961 | struct ata_port *ap = host->ports[i]; | |
6962 | ||
f3187195 TH |
6963 | if (!host->ops && !ata_port_is_dummy(ap)) |
6964 | host->ops = ap->ops; | |
6965 | ||
32ebbc0c TH |
6966 | if (ap->ops->port_stop) |
6967 | have_stop = 1; | |
6968 | } | |
6969 | ||
6970 | if (host->ops->host_stop) | |
6971 | have_stop = 1; | |
6972 | ||
6973 | if (have_stop) { | |
6974 | start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); | |
6975 | if (!start_dr) | |
6976 | return -ENOMEM; | |
6977 | } | |
6978 | ||
6979 | for (i = 0; i < host->n_ports; i++) { | |
6980 | struct ata_port *ap = host->ports[i]; | |
6981 | ||
ecef7253 TH |
6982 | if (ap->ops->port_start) { |
6983 | rc = ap->ops->port_start(ap); | |
6984 | if (rc) { | |
0f9fe9b7 | 6985 | if (rc != -ENODEV) |
0f757743 AM |
6986 | dev_printk(KERN_ERR, host->dev, |
6987 | "failed to start port %d " | |
6988 | "(errno=%d)\n", i, rc); | |
ecef7253 TH |
6989 | goto err_out; |
6990 | } | |
6991 | } | |
ecef7253 TH |
6992 | ata_eh_freeze_port(ap); |
6993 | } | |
6994 | ||
32ebbc0c TH |
6995 | if (start_dr) |
6996 | devres_add(host->dev, start_dr); | |
ecef7253 TH |
6997 | host->flags |= ATA_HOST_STARTED; |
6998 | return 0; | |
6999 | ||
7000 | err_out: | |
7001 | while (--i >= 0) { | |
7002 | struct ata_port *ap = host->ports[i]; | |
7003 | ||
7004 | if (ap->ops->port_stop) | |
7005 | ap->ops->port_stop(ap); | |
7006 | } | |
32ebbc0c | 7007 | devres_free(start_dr); |
ecef7253 TH |
7008 | return rc; |
7009 | } | |
7010 | ||
b03732f0 | 7011 | /** |
cca3974e JG |
7012 | * ata_sas_host_init - Initialize a host struct |
7013 | * @host: host to initialize | |
7014 | * @dev: device host is attached to | |
7015 | * @flags: host flags | |
7016 | * @ops: port_ops | |
b03732f0 BK |
7017 | * |
7018 | * LOCKING: | |
7019 | * PCI/etc. bus probe sem. | |
7020 | * | |
7021 | */ | |
f3187195 | 7022 | /* KILLME - the only user left is ipr */ |
cca3974e JG |
7023 | void ata_host_init(struct ata_host *host, struct device *dev, |
7024 | unsigned long flags, const struct ata_port_operations *ops) | |
b03732f0 | 7025 | { |
cca3974e JG |
7026 | spin_lock_init(&host->lock); |
7027 | host->dev = dev; | |
7028 | host->flags = flags; | |
7029 | host->ops = ops; | |
b03732f0 BK |
7030 | } |
7031 | ||
f3187195 TH |
7032 | /** |
7033 | * ata_host_register - register initialized ATA host | |
7034 | * @host: ATA host to register | |
7035 | * @sht: template for SCSI host | |
7036 | * | |
7037 | * Register initialized ATA host. @host is allocated using | |
7038 | * ata_host_alloc() and fully initialized by LLD. This function | |
7039 | * starts ports, registers @host with ATA and SCSI layers and | |
7040 | * probe registered devices. | |
7041 | * | |
7042 | * LOCKING: | |
7043 | * Inherited from calling layer (may sleep). | |
7044 | * | |
7045 | * RETURNS: | |
7046 | * 0 on success, -errno otherwise. | |
7047 | */ | |
7048 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
7049 | { | |
7050 | int i, rc; | |
7051 | ||
7052 | /* host must have been started */ | |
7053 | if (!(host->flags & ATA_HOST_STARTED)) { | |
7054 | dev_printk(KERN_ERR, host->dev, | |
7055 | "BUG: trying to register unstarted host\n"); | |
7056 | WARN_ON(1); | |
7057 | return -EINVAL; | |
7058 | } | |
7059 | ||
7060 | /* Blow away unused ports. This happens when LLD can't | |
7061 | * determine the exact number of ports to allocate at | |
7062 | * allocation time. | |
7063 | */ | |
7064 | for (i = host->n_ports; host->ports[i]; i++) | |
7065 | kfree(host->ports[i]); | |
7066 | ||
7067 | /* give ports names and add SCSI hosts */ | |
7068 | for (i = 0; i < host->n_ports; i++) | |
7069 | host->ports[i]->print_id = ata_print_id++; | |
7070 | ||
7071 | rc = ata_scsi_add_hosts(host, sht); | |
7072 | if (rc) | |
7073 | return rc; | |
7074 | ||
fafbae87 TH |
7075 | /* associate with ACPI nodes */ |
7076 | ata_acpi_associate(host); | |
7077 | ||
f3187195 TH |
7078 | /* set cable, sata_spd_limit and report */ |
7079 | for (i = 0; i < host->n_ports; i++) { | |
7080 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
7081 | unsigned long xfer_mask; |
7082 | ||
7083 | /* set SATA cable type if still unset */ | |
7084 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
7085 | ap->cbl = ATA_CBL_SATA; | |
7086 | ||
7087 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 7088 | sata_link_init_spd(&ap->link); |
f3187195 | 7089 | |
cbcdd875 | 7090 | /* print per-port info to dmesg */ |
f3187195 TH |
7091 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
7092 | ap->udma_mask); | |
7093 | ||
abf6e8ed | 7094 | if (!ata_port_is_dummy(ap)) { |
cbcdd875 TH |
7095 | ata_port_printk(ap, KERN_INFO, |
7096 | "%cATA max %s %s\n", | |
a16abc0b | 7097 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
f3187195 | 7098 | ata_mode_string(xfer_mask), |
cbcdd875 | 7099 | ap->link.eh_info.desc); |
abf6e8ed TH |
7100 | ata_ehi_clear_desc(&ap->link.eh_info); |
7101 | } else | |
f3187195 TH |
7102 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
7103 | } | |
7104 | ||
7105 | /* perform each probe synchronously */ | |
7106 | DPRINTK("probe begin\n"); | |
7107 | for (i = 0; i < host->n_ports; i++) { | |
7108 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
7109 | |
7110 | /* probe */ | |
7111 | if (ap->ops->error_handler) { | |
9af5c9c9 | 7112 | struct ata_eh_info *ehi = &ap->link.eh_info; |
f3187195 TH |
7113 | unsigned long flags; |
7114 | ||
7115 | ata_port_probe(ap); | |
7116 | ||
7117 | /* kick EH for boot probing */ | |
7118 | spin_lock_irqsave(ap->lock, flags); | |
7119 | ||
f58229f8 TH |
7120 | ehi->probe_mask = |
7121 | (1 << ata_link_max_devices(&ap->link)) - 1; | |
f3187195 TH |
7122 | ehi->action |= ATA_EH_SOFTRESET; |
7123 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; | |
7124 | ||
f4d6d004 | 7125 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
f3187195 TH |
7126 | ap->pflags |= ATA_PFLAG_LOADING; |
7127 | ata_port_schedule_eh(ap); | |
7128 | ||
7129 | spin_unlock_irqrestore(ap->lock, flags); | |
7130 | ||
7131 | /* wait for EH to finish */ | |
7132 | ata_port_wait_eh(ap); | |
7133 | } else { | |
7134 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
7135 | rc = ata_bus_probe(ap); | |
7136 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
7137 | ||
7138 | if (rc) { | |
7139 | /* FIXME: do something useful here? | |
7140 | * Current libata behavior will | |
7141 | * tear down everything when | |
7142 | * the module is removed | |
7143 | * or the h/w is unplugged. | |
7144 | */ | |
7145 | } | |
7146 | } | |
7147 | } | |
7148 | ||
7149 | /* probes are done, now scan each port's disk(s) */ | |
7150 | DPRINTK("host probe begin\n"); | |
7151 | for (i = 0; i < host->n_ports; i++) { | |
7152 | struct ata_port *ap = host->ports[i]; | |
7153 | ||
1ae46317 | 7154 | ata_scsi_scan_host(ap, 1); |
ca77329f | 7155 | ata_lpm_schedule(ap, ap->pm_policy); |
f3187195 TH |
7156 | } |
7157 | ||
7158 | return 0; | |
7159 | } | |
7160 | ||
f5cda257 TH |
7161 | /** |
7162 | * ata_host_activate - start host, request IRQ and register it | |
7163 | * @host: target ATA host | |
7164 | * @irq: IRQ to request | |
7165 | * @irq_handler: irq_handler used when requesting IRQ | |
7166 | * @irq_flags: irq_flags used when requesting IRQ | |
7167 | * @sht: scsi_host_template to use when registering the host | |
7168 | * | |
7169 | * After allocating an ATA host and initializing it, most libata | |
7170 | * LLDs perform three steps to activate the host - start host, | |
7171 | * request IRQ and register it. This helper takes necessasry | |
7172 | * arguments and performs the three steps in one go. | |
7173 | * | |
3d46b2e2 PM |
7174 | * An invalid IRQ skips the IRQ registration and expects the host to |
7175 | * have set polling mode on the port. In this case, @irq_handler | |
7176 | * should be NULL. | |
7177 | * | |
f5cda257 TH |
7178 | * LOCKING: |
7179 | * Inherited from calling layer (may sleep). | |
7180 | * | |
7181 | * RETURNS: | |
7182 | * 0 on success, -errno otherwise. | |
7183 | */ | |
7184 | int ata_host_activate(struct ata_host *host, int irq, | |
7185 | irq_handler_t irq_handler, unsigned long irq_flags, | |
7186 | struct scsi_host_template *sht) | |
7187 | { | |
cbcdd875 | 7188 | int i, rc; |
f5cda257 TH |
7189 | |
7190 | rc = ata_host_start(host); | |
7191 | if (rc) | |
7192 | return rc; | |
7193 | ||
3d46b2e2 PM |
7194 | /* Special case for polling mode */ |
7195 | if (!irq) { | |
7196 | WARN_ON(irq_handler); | |
7197 | return ata_host_register(host, sht); | |
7198 | } | |
7199 | ||
f5cda257 TH |
7200 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
7201 | dev_driver_string(host->dev), host); | |
7202 | if (rc) | |
7203 | return rc; | |
7204 | ||
cbcdd875 TH |
7205 | for (i = 0; i < host->n_ports; i++) |
7206 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 7207 | |
f5cda257 TH |
7208 | rc = ata_host_register(host, sht); |
7209 | /* if failed, just free the IRQ and leave ports alone */ | |
7210 | if (rc) | |
7211 | devm_free_irq(host->dev, irq, host); | |
7212 | ||
7213 | return rc; | |
7214 | } | |
7215 | ||
720ba126 TH |
7216 | /** |
7217 | * ata_port_detach - Detach ATA port in prepration of device removal | |
7218 | * @ap: ATA port to be detached | |
7219 | * | |
7220 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
7221 | * then, remove the associated SCSI host. @ap is guaranteed to | |
7222 | * be quiescent on return from this function. | |
7223 | * | |
7224 | * LOCKING: | |
7225 | * Kernel thread context (may sleep). | |
7226 | */ | |
741b7763 | 7227 | static void ata_port_detach(struct ata_port *ap) |
720ba126 TH |
7228 | { |
7229 | unsigned long flags; | |
41bda9c9 | 7230 | struct ata_link *link; |
f58229f8 | 7231 | struct ata_device *dev; |
720ba126 TH |
7232 | |
7233 | if (!ap->ops->error_handler) | |
c3cf30a9 | 7234 | goto skip_eh; |
720ba126 TH |
7235 | |
7236 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 7237 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 7238 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ba6a1308 | 7239 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
7240 | |
7241 | ata_port_wait_eh(ap); | |
7242 | ||
7f9ad9b8 TH |
7243 | /* EH is now guaranteed to see UNLOADING - EH context belongs |
7244 | * to us. Disable all existing devices. | |
720ba126 | 7245 | */ |
41bda9c9 TH |
7246 | ata_port_for_each_link(link, ap) { |
7247 | ata_link_for_each_dev(dev, link) | |
7248 | ata_dev_disable(dev); | |
7249 | } | |
720ba126 | 7250 | |
720ba126 TH |
7251 | /* Final freeze & EH. All in-flight commands are aborted. EH |
7252 | * will be skipped and retrials will be terminated with bad | |
7253 | * target. | |
7254 | */ | |
ba6a1308 | 7255 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 7256 | ata_port_freeze(ap); /* won't be thawed */ |
ba6a1308 | 7257 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
7258 | |
7259 | ata_port_wait_eh(ap); | |
45a66c1c | 7260 | cancel_rearming_delayed_work(&ap->hotplug_task); |
720ba126 | 7261 | |
c3cf30a9 | 7262 | skip_eh: |
720ba126 | 7263 | /* remove the associated SCSI host */ |
cca3974e | 7264 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
7265 | } |
7266 | ||
0529c159 TH |
7267 | /** |
7268 | * ata_host_detach - Detach all ports of an ATA host | |
7269 | * @host: Host to detach | |
7270 | * | |
7271 | * Detach all ports of @host. | |
7272 | * | |
7273 | * LOCKING: | |
7274 | * Kernel thread context (may sleep). | |
7275 | */ | |
7276 | void ata_host_detach(struct ata_host *host) | |
7277 | { | |
7278 | int i; | |
7279 | ||
7280 | for (i = 0; i < host->n_ports; i++) | |
7281 | ata_port_detach(host->ports[i]); | |
562f0c2d TH |
7282 | |
7283 | /* the host is dead now, dissociate ACPI */ | |
7284 | ata_acpi_dissociate(host); | |
0529c159 TH |
7285 | } |
7286 | ||
1da177e4 LT |
7287 | /** |
7288 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
7289 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
7290 | * |
7291 | * Utility function which initializes data_addr, error_addr, | |
7292 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
7293 | * device_addr, status_addr, and command_addr to standard offsets | |
7294 | * relative to cmd_addr. | |
7295 | * | |
7296 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 7297 | */ |
0baab86b | 7298 | |
1da177e4 LT |
7299 | void ata_std_ports(struct ata_ioports *ioaddr) |
7300 | { | |
7301 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
7302 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
7303 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
7304 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
7305 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
7306 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
7307 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
7308 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
7309 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
7310 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
7311 | } | |
7312 | ||
0baab86b | 7313 | |
374b1873 JG |
7314 | #ifdef CONFIG_PCI |
7315 | ||
1da177e4 LT |
7316 | /** |
7317 | * ata_pci_remove_one - PCI layer callback for device removal | |
7318 | * @pdev: PCI device that was removed | |
7319 | * | |
b878ca5d TH |
7320 | * PCI layer indicates to libata via this hook that hot-unplug or |
7321 | * module unload event has occurred. Detach all ports. Resource | |
7322 | * release is handled via devres. | |
1da177e4 LT |
7323 | * |
7324 | * LOCKING: | |
7325 | * Inherited from PCI layer (may sleep). | |
7326 | */ | |
f0d36efd | 7327 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 | 7328 | { |
2855568b | 7329 | struct device *dev = &pdev->dev; |
cca3974e | 7330 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 7331 | |
b878ca5d | 7332 | ata_host_detach(host); |
1da177e4 LT |
7333 | } |
7334 | ||
7335 | /* move to PCI subsystem */ | |
057ace5e | 7336 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
7337 | { |
7338 | unsigned long tmp = 0; | |
7339 | ||
7340 | switch (bits->width) { | |
7341 | case 1: { | |
7342 | u8 tmp8 = 0; | |
7343 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
7344 | tmp = tmp8; | |
7345 | break; | |
7346 | } | |
7347 | case 2: { | |
7348 | u16 tmp16 = 0; | |
7349 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
7350 | tmp = tmp16; | |
7351 | break; | |
7352 | } | |
7353 | case 4: { | |
7354 | u32 tmp32 = 0; | |
7355 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
7356 | tmp = tmp32; | |
7357 | break; | |
7358 | } | |
7359 | ||
7360 | default: | |
7361 | return -EINVAL; | |
7362 | } | |
7363 | ||
7364 | tmp &= bits->mask; | |
7365 | ||
7366 | return (tmp == bits->val) ? 1 : 0; | |
7367 | } | |
9b847548 | 7368 | |
6ffa01d8 | 7369 | #ifdef CONFIG_PM |
3c5100c1 | 7370 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
7371 | { |
7372 | pci_save_state(pdev); | |
4c90d971 | 7373 | pci_disable_device(pdev); |
500530f6 | 7374 | |
3a2d5b70 | 7375 | if (mesg.event & PM_EVENT_SLEEP) |
500530f6 | 7376 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
7377 | } |
7378 | ||
553c4aa6 | 7379 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 7380 | { |
553c4aa6 TH |
7381 | int rc; |
7382 | ||
9b847548 JA |
7383 | pci_set_power_state(pdev, PCI_D0); |
7384 | pci_restore_state(pdev); | |
553c4aa6 | 7385 | |
b878ca5d | 7386 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
7387 | if (rc) { |
7388 | dev_printk(KERN_ERR, &pdev->dev, | |
7389 | "failed to enable device after resume (%d)\n", rc); | |
7390 | return rc; | |
7391 | } | |
7392 | ||
9b847548 | 7393 | pci_set_master(pdev); |
553c4aa6 | 7394 | return 0; |
500530f6 TH |
7395 | } |
7396 | ||
3c5100c1 | 7397 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 7398 | { |
cca3974e | 7399 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
7400 | int rc = 0; |
7401 | ||
cca3974e | 7402 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
7403 | if (rc) |
7404 | return rc; | |
7405 | ||
3c5100c1 | 7406 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
7407 | |
7408 | return 0; | |
7409 | } | |
7410 | ||
7411 | int ata_pci_device_resume(struct pci_dev *pdev) | |
7412 | { | |
cca3974e | 7413 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 7414 | int rc; |
500530f6 | 7415 | |
553c4aa6 TH |
7416 | rc = ata_pci_device_do_resume(pdev); |
7417 | if (rc == 0) | |
7418 | ata_host_resume(host); | |
7419 | return rc; | |
9b847548 | 7420 | } |
6ffa01d8 TH |
7421 | #endif /* CONFIG_PM */ |
7422 | ||
1da177e4 LT |
7423 | #endif /* CONFIG_PCI */ |
7424 | ||
33267325 TH |
7425 | static int __init ata_parse_force_one(char **cur, |
7426 | struct ata_force_ent *force_ent, | |
7427 | const char **reason) | |
7428 | { | |
7429 | /* FIXME: Currently, there's no way to tag init const data and | |
7430 | * using __initdata causes build failure on some versions of | |
7431 | * gcc. Once __initdataconst is implemented, add const to the | |
7432 | * following structure. | |
7433 | */ | |
7434 | static struct ata_force_param force_tbl[] __initdata = { | |
7435 | { "40c", .cbl = ATA_CBL_PATA40 }, | |
7436 | { "80c", .cbl = ATA_CBL_PATA80 }, | |
7437 | { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, | |
7438 | { "unk", .cbl = ATA_CBL_PATA_UNK }, | |
7439 | { "ign", .cbl = ATA_CBL_PATA_IGN }, | |
7440 | { "sata", .cbl = ATA_CBL_SATA }, | |
7441 | { "1.5Gbps", .spd_limit = 1 }, | |
7442 | { "3.0Gbps", .spd_limit = 2 }, | |
7443 | { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, | |
7444 | { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, | |
7445 | { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, | |
7446 | { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, | |
7447 | { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, | |
7448 | { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, | |
7449 | { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, | |
7450 | { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, | |
7451 | { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, | |
7452 | { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, | |
7453 | { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, | |
7454 | { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, | |
7455 | { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, | |
7456 | { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, | |
7457 | { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
7458 | { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
7459 | { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
7460 | { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
7461 | { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
7462 | { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
7463 | { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
7464 | { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
7465 | { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
7466 | { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
7467 | { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
7468 | { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
7469 | { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
7470 | { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
7471 | { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
7472 | { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
7473 | { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
7474 | { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
7475 | { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
7476 | { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
7477 | { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
7478 | { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, | |
7479 | }; | |
7480 | char *start = *cur, *p = *cur; | |
7481 | char *id, *val, *endp; | |
7482 | const struct ata_force_param *match_fp = NULL; | |
7483 | int nr_matches = 0, i; | |
7484 | ||
7485 | /* find where this param ends and update *cur */ | |
7486 | while (*p != '\0' && *p != ',') | |
7487 | p++; | |
7488 | ||
7489 | if (*p == '\0') | |
7490 | *cur = p; | |
7491 | else | |
7492 | *cur = p + 1; | |
7493 | ||
7494 | *p = '\0'; | |
7495 | ||
7496 | /* parse */ | |
7497 | p = strchr(start, ':'); | |
7498 | if (!p) { | |
7499 | val = strstrip(start); | |
7500 | goto parse_val; | |
7501 | } | |
7502 | *p = '\0'; | |
7503 | ||
7504 | id = strstrip(start); | |
7505 | val = strstrip(p + 1); | |
7506 | ||
7507 | /* parse id */ | |
7508 | p = strchr(id, '.'); | |
7509 | if (p) { | |
7510 | *p++ = '\0'; | |
7511 | force_ent->device = simple_strtoul(p, &endp, 10); | |
7512 | if (p == endp || *endp != '\0') { | |
7513 | *reason = "invalid device"; | |
7514 | return -EINVAL; | |
7515 | } | |
7516 | } | |
7517 | ||
7518 | force_ent->port = simple_strtoul(id, &endp, 10); | |
7519 | if (p == endp || *endp != '\0') { | |
7520 | *reason = "invalid port/link"; | |
7521 | return -EINVAL; | |
7522 | } | |
7523 | ||
7524 | parse_val: | |
7525 | /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ | |
7526 | for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { | |
7527 | const struct ata_force_param *fp = &force_tbl[i]; | |
7528 | ||
7529 | if (strncasecmp(val, fp->name, strlen(val))) | |
7530 | continue; | |
7531 | ||
7532 | nr_matches++; | |
7533 | match_fp = fp; | |
7534 | ||
7535 | if (strcasecmp(val, fp->name) == 0) { | |
7536 | nr_matches = 1; | |
7537 | break; | |
7538 | } | |
7539 | } | |
7540 | ||
7541 | if (!nr_matches) { | |
7542 | *reason = "unknown value"; | |
7543 | return -EINVAL; | |
7544 | } | |
7545 | if (nr_matches > 1) { | |
7546 | *reason = "ambigious value"; | |
7547 | return -EINVAL; | |
7548 | } | |
7549 | ||
7550 | force_ent->param = *match_fp; | |
7551 | ||
7552 | return 0; | |
7553 | } | |
7554 | ||
7555 | static void __init ata_parse_force_param(void) | |
7556 | { | |
7557 | int idx = 0, size = 1; | |
7558 | int last_port = -1, last_device = -1; | |
7559 | char *p, *cur, *next; | |
7560 | ||
7561 | /* calculate maximum number of params and allocate force_tbl */ | |
7562 | for (p = ata_force_param_buf; *p; p++) | |
7563 | if (*p == ',') | |
7564 | size++; | |
7565 | ||
7566 | ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); | |
7567 | if (!ata_force_tbl) { | |
7568 | printk(KERN_WARNING "ata: failed to extend force table, " | |
7569 | "libata.force ignored\n"); | |
7570 | return; | |
7571 | } | |
7572 | ||
7573 | /* parse and populate the table */ | |
7574 | for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { | |
7575 | const char *reason = ""; | |
7576 | struct ata_force_ent te = { .port = -1, .device = -1 }; | |
7577 | ||
7578 | next = cur; | |
7579 | if (ata_parse_force_one(&next, &te, &reason)) { | |
7580 | printk(KERN_WARNING "ata: failed to parse force " | |
7581 | "parameter \"%s\" (%s)\n", | |
7582 | cur, reason); | |
7583 | continue; | |
7584 | } | |
7585 | ||
7586 | if (te.port == -1) { | |
7587 | te.port = last_port; | |
7588 | te.device = last_device; | |
7589 | } | |
7590 | ||
7591 | ata_force_tbl[idx++] = te; | |
7592 | ||
7593 | last_port = te.port; | |
7594 | last_device = te.device; | |
7595 | } | |
7596 | ||
7597 | ata_force_tbl_size = idx; | |
7598 | } | |
1da177e4 | 7599 | |
1da177e4 LT |
7600 | static int __init ata_init(void) |
7601 | { | |
a8601e5f | 7602 | ata_probe_timeout *= HZ; |
33267325 TH |
7603 | |
7604 | ata_parse_force_param(); | |
7605 | ||
1da177e4 LT |
7606 | ata_wq = create_workqueue("ata"); |
7607 | if (!ata_wq) | |
7608 | return -ENOMEM; | |
7609 | ||
453b07ac TH |
7610 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
7611 | if (!ata_aux_wq) { | |
7612 | destroy_workqueue(ata_wq); | |
7613 | return -ENOMEM; | |
7614 | } | |
7615 | ||
1da177e4 LT |
7616 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
7617 | return 0; | |
7618 | } | |
7619 | ||
7620 | static void __exit ata_exit(void) | |
7621 | { | |
33267325 | 7622 | kfree(ata_force_tbl); |
1da177e4 | 7623 | destroy_workqueue(ata_wq); |
453b07ac | 7624 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
7625 | } |
7626 | ||
a4625085 | 7627 | subsys_initcall(ata_init); |
1da177e4 LT |
7628 | module_exit(ata_exit); |
7629 | ||
67846b30 | 7630 | static unsigned long ratelimit_time; |
34af946a | 7631 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
7632 | |
7633 | int ata_ratelimit(void) | |
7634 | { | |
7635 | int rc; | |
7636 | unsigned long flags; | |
7637 | ||
7638 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
7639 | ||
7640 | if (time_after(jiffies, ratelimit_time)) { | |
7641 | rc = 1; | |
7642 | ratelimit_time = jiffies + (HZ/5); | |
7643 | } else | |
7644 | rc = 0; | |
7645 | ||
7646 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
7647 | ||
7648 | return rc; | |
7649 | } | |
7650 | ||
c22daff4 TH |
7651 | /** |
7652 | * ata_wait_register - wait until register value changes | |
7653 | * @reg: IO-mapped register | |
7654 | * @mask: Mask to apply to read register value | |
7655 | * @val: Wait condition | |
7656 | * @interval_msec: polling interval in milliseconds | |
7657 | * @timeout_msec: timeout in milliseconds | |
7658 | * | |
7659 | * Waiting for some bits of register to change is a common | |
7660 | * operation for ATA controllers. This function reads 32bit LE | |
7661 | * IO-mapped register @reg and tests for the following condition. | |
7662 | * | |
7663 | * (*@reg & mask) != val | |
7664 | * | |
7665 | * If the condition is met, it returns; otherwise, the process is | |
7666 | * repeated after @interval_msec until timeout. | |
7667 | * | |
7668 | * LOCKING: | |
7669 | * Kernel thread context (may sleep) | |
7670 | * | |
7671 | * RETURNS: | |
7672 | * The final register value. | |
7673 | */ | |
7674 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
7675 | unsigned long interval_msec, | |
7676 | unsigned long timeout_msec) | |
7677 | { | |
7678 | unsigned long timeout; | |
7679 | u32 tmp; | |
7680 | ||
7681 | tmp = ioread32(reg); | |
7682 | ||
7683 | /* Calculate timeout _after_ the first read to make sure | |
7684 | * preceding writes reach the controller before starting to | |
7685 | * eat away the timeout. | |
7686 | */ | |
7687 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
7688 | ||
7689 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
7690 | msleep(interval_msec); | |
7691 | tmp = ioread32(reg); | |
7692 | } | |
7693 | ||
7694 | return tmp; | |
7695 | } | |
7696 | ||
dd5b06c4 TH |
7697 | /* |
7698 | * Dummy port_ops | |
7699 | */ | |
7700 | static void ata_dummy_noret(struct ata_port *ap) { } | |
7701 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } | |
7702 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } | |
7703 | ||
7704 | static u8 ata_dummy_check_status(struct ata_port *ap) | |
7705 | { | |
7706 | return ATA_DRDY; | |
7707 | } | |
7708 | ||
7709 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) | |
7710 | { | |
7711 | return AC_ERR_SYSTEM; | |
7712 | } | |
7713 | ||
7714 | const struct ata_port_operations ata_dummy_port_ops = { | |
dd5b06c4 TH |
7715 | .check_status = ata_dummy_check_status, |
7716 | .check_altstatus = ata_dummy_check_status, | |
7717 | .dev_select = ata_noop_dev_select, | |
7718 | .qc_prep = ata_noop_qc_prep, | |
7719 | .qc_issue = ata_dummy_qc_issue, | |
7720 | .freeze = ata_dummy_noret, | |
7721 | .thaw = ata_dummy_noret, | |
7722 | .error_handler = ata_dummy_noret, | |
7723 | .post_internal_cmd = ata_dummy_qc_noret, | |
7724 | .irq_clear = ata_dummy_noret, | |
7725 | .port_start = ata_dummy_ret0, | |
7726 | .port_stop = ata_dummy_noret, | |
7727 | }; | |
7728 | ||
21b0ad4f TH |
7729 | const struct ata_port_info ata_dummy_port_info = { |
7730 | .port_ops = &ata_dummy_port_ops, | |
7731 | }; | |
7732 | ||
1da177e4 LT |
7733 | /* |
7734 | * libata is essentially a library of internal helper functions for | |
7735 | * low-level ATA host controller drivers. As such, the API/ABI is | |
7736 | * likely to change as new drivers are added and updated. | |
7737 | * Do not depend on ABI/API stability. | |
7738 | */ | |
e9c83914 TH |
7739 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
7740 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
7741 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
dd5b06c4 | 7742 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 7743 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1da177e4 LT |
7744 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
7745 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
cca3974e | 7746 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 7747 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 7748 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
ecef7253 | 7749 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 7750 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 7751 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 7752 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 | 7753 | EXPORT_SYMBOL_GPL(ata_sg_init); |
9a1004d0 | 7754 | EXPORT_SYMBOL_GPL(ata_hsm_move); |
f686bcb8 | 7755 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 7756 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
1da177e4 | 7757 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
1da177e4 LT |
7758 | EXPORT_SYMBOL_GPL(ata_tf_load); |
7759 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
7760 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
7761 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
43727fbc | 7762 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
1da177e4 LT |
7763 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
7764 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6357357c TH |
7765 | EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
7766 | EXPORT_SYMBOL_GPL(ata_unpack_xfermask); | |
7767 | EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); | |
7768 | EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); | |
7769 | EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); | |
7770 | EXPORT_SYMBOL_GPL(ata_mode_string); | |
7771 | EXPORT_SYMBOL_GPL(ata_id_xfermask); | |
1da177e4 LT |
7772 | EXPORT_SYMBOL_GPL(ata_check_status); |
7773 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
7774 | EXPORT_SYMBOL_GPL(ata_exec_command); |
7775 | EXPORT_SYMBOL_GPL(ata_port_start); | |
d92e74d3 | 7776 | EXPORT_SYMBOL_GPL(ata_sff_port_start); |
1da177e4 | 7777 | EXPORT_SYMBOL_GPL(ata_interrupt); |
04351821 | 7778 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
0d5ff566 TH |
7779 | EXPORT_SYMBOL_GPL(ata_data_xfer); |
7780 | EXPORT_SYMBOL_GPL(ata_data_xfer_noirq); | |
31cc23b3 | 7781 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
1da177e4 | 7782 | EXPORT_SYMBOL_GPL(ata_qc_prep); |
d26fc955 | 7783 | EXPORT_SYMBOL_GPL(ata_dumb_qc_prep); |
e46834cd | 7784 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
7785 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
7786 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
7787 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
7788 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
7789 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
6d97dbd7 TH |
7790 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
7791 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); | |
7792 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); | |
7793 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); | |
7794 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); | |
1da177e4 | 7795 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 7796 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 7797 | EXPORT_SYMBOL_GPL(sata_set_spd); |
936fd732 TH |
7798 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
7799 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
1da177e4 | 7800 | EXPORT_SYMBOL_GPL(ata_bus_reset); |
f5914a46 | 7801 | EXPORT_SYMBOL_GPL(ata_std_prereset); |
c2bd5804 | 7802 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
cc0680a5 | 7803 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
c2bd5804 TH |
7804 | EXPORT_SYMBOL_GPL(sata_std_hardreset); |
7805 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
2e9edbf8 JG |
7806 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
7807 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 7808 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 7809 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 7810 | EXPORT_SYMBOL_GPL(ata_wait_register); |
6f8b9958 | 7811 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
88ff6eaf | 7812 | EXPORT_SYMBOL_GPL(ata_wait_after_reset); |
d4b2bab4 | 7813 | EXPORT_SYMBOL_GPL(ata_wait_ready); |
1da177e4 LT |
7814 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
7815 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 | 7816 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 7817 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 7818 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
1da177e4 | 7819 | EXPORT_SYMBOL_GPL(ata_host_intr); |
34bf2170 TH |
7820 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
7821 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
7822 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
7823 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
7824 | EXPORT_SYMBOL_GPL(ata_link_online); |
7825 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 7826 | #ifdef CONFIG_PM |
cca3974e JG |
7827 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
7828 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 7829 | #endif /* CONFIG_PM */ |
6a62a04d TH |
7830 | EXPORT_SYMBOL_GPL(ata_id_string); |
7831 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
1da177e4 LT |
7832 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
7833 | ||
1bc4ccff | 7834 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
6357357c | 7835 | EXPORT_SYMBOL_GPL(ata_timing_find_mode); |
452503f9 AC |
7836 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
7837 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
a0f79b92 | 7838 | EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); |
452503f9 | 7839 | |
1da177e4 LT |
7840 | #ifdef CONFIG_PCI |
7841 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
d583bc18 | 7842 | EXPORT_SYMBOL_GPL(ata_pci_init_sff_host); |
1626aeb8 | 7843 | EXPORT_SYMBOL_GPL(ata_pci_init_bmdma); |
d583bc18 | 7844 | EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host); |
4e6b79fa | 7845 | EXPORT_SYMBOL_GPL(ata_pci_activate_sff_host); |
1da177e4 LT |
7846 | EXPORT_SYMBOL_GPL(ata_pci_init_one); |
7847 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
6ffa01d8 | 7848 | #ifdef CONFIG_PM |
500530f6 TH |
7849 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
7850 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
7851 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
7852 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 7853 | #endif /* CONFIG_PM */ |
67951ade AC |
7854 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
7855 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 7856 | #endif /* CONFIG_PCI */ |
9b847548 | 7857 | |
31f88384 | 7858 | EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); |
3af9a77a TH |
7859 | EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); |
7860 | EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); | |
7861 | EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); | |
7862 | EXPORT_SYMBOL_GPL(sata_pmp_do_eh); | |
7863 | ||
b64bbc39 TH |
7864 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
7865 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
7866 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
7867 | EXPORT_SYMBOL_GPL(ata_port_desc); |
7868 | #ifdef CONFIG_PCI | |
7869 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
7870 | #endif /* CONFIG_PCI */ | |
7b70fc03 | 7871 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 7872 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 7873 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 7874 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 7875 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
7876 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
7877 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
7878 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
7879 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
022bdb07 | 7880 | EXPORT_SYMBOL_GPL(ata_do_eh); |
83625006 | 7881 | EXPORT_SYMBOL_GPL(ata_irq_on); |
a619f981 | 7882 | EXPORT_SYMBOL_GPL(ata_dev_try_classify); |
be0d18df AC |
7883 | |
7884 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
7885 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
7886 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
c88f90c3 | 7887 | EXPORT_SYMBOL_GPL(ata_cable_ignore); |
be0d18df | 7888 | EXPORT_SYMBOL_GPL(ata_cable_sata); |