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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 | * | |
1da177e4 LT |
33 | */ |
34 | ||
35 | #include <linux/config.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/pci.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/list.h> | |
41 | #include <linux/mm.h> | |
42 | #include <linux/highmem.h> | |
43 | #include <linux/spinlock.h> | |
44 | #include <linux/blkdev.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/timer.h> | |
47 | #include <linux/interrupt.h> | |
48 | #include <linux/completion.h> | |
49 | #include <linux/suspend.h> | |
50 | #include <linux/workqueue.h> | |
67846b30 | 51 | #include <linux/jiffies.h> |
378f058c | 52 | #include <linux/scatterlist.h> |
1da177e4 | 53 | #include <scsi/scsi.h> |
1da177e4 | 54 | #include "scsi_priv.h" |
193515d5 | 55 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
56 | #include <scsi/scsi_host.h> |
57 | #include <linux/libata.h> | |
58 | #include <asm/io.h> | |
59 | #include <asm/semaphore.h> | |
60 | #include <asm/byteorder.h> | |
61 | ||
62 | #include "libata.h" | |
63 | ||
3373efd8 TH |
64 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
65 | u16 heads, u16 sectors); | |
66 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
67 | static void ata_dev_xfermask(struct ata_device *dev); | |
1da177e4 LT |
68 | |
69 | static unsigned int ata_unique_id = 1; | |
70 | static struct workqueue_struct *ata_wq; | |
71 | ||
418dc1f5 | 72 | int atapi_enabled = 1; |
1623c81e JG |
73 | module_param(atapi_enabled, int, 0444); |
74 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
75 | ||
95de719a AL |
76 | int atapi_dmadir = 0; |
77 | module_param(atapi_dmadir, int, 0444); | |
78 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
79 | ||
c3c013a2 JG |
80 | int libata_fua = 0; |
81 | module_param_named(fua, libata_fua, int, 0444); | |
82 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
83 | ||
1da177e4 LT |
84 | MODULE_AUTHOR("Jeff Garzik"); |
85 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
86 | MODULE_LICENSE("GPL"); | |
87 | MODULE_VERSION(DRV_VERSION); | |
88 | ||
0baab86b | 89 | |
1da177e4 LT |
90 | /** |
91 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
92 | * @tf: Taskfile to convert | |
93 | * @fis: Buffer into which data will output | |
94 | * @pmp: Port multiplier port | |
95 | * | |
96 | * Converts a standard ATA taskfile to a Serial ATA | |
97 | * FIS structure (Register - Host to Device). | |
98 | * | |
99 | * LOCKING: | |
100 | * Inherited from caller. | |
101 | */ | |
102 | ||
057ace5e | 103 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) |
1da177e4 LT |
104 | { |
105 | fis[0] = 0x27; /* Register - Host to Device FIS */ | |
106 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, | |
107 | bit 7 indicates Command FIS */ | |
108 | fis[2] = tf->command; | |
109 | fis[3] = tf->feature; | |
110 | ||
111 | fis[4] = tf->lbal; | |
112 | fis[5] = tf->lbam; | |
113 | fis[6] = tf->lbah; | |
114 | fis[7] = tf->device; | |
115 | ||
116 | fis[8] = tf->hob_lbal; | |
117 | fis[9] = tf->hob_lbam; | |
118 | fis[10] = tf->hob_lbah; | |
119 | fis[11] = tf->hob_feature; | |
120 | ||
121 | fis[12] = tf->nsect; | |
122 | fis[13] = tf->hob_nsect; | |
123 | fis[14] = 0; | |
124 | fis[15] = tf->ctl; | |
125 | ||
126 | fis[16] = 0; | |
127 | fis[17] = 0; | |
128 | fis[18] = 0; | |
129 | fis[19] = 0; | |
130 | } | |
131 | ||
132 | /** | |
133 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
134 | * @fis: Buffer from which data will be input | |
135 | * @tf: Taskfile to output | |
136 | * | |
e12a1be6 | 137 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
138 | * |
139 | * LOCKING: | |
140 | * Inherited from caller. | |
141 | */ | |
142 | ||
057ace5e | 143 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
144 | { |
145 | tf->command = fis[2]; /* status */ | |
146 | tf->feature = fis[3]; /* error */ | |
147 | ||
148 | tf->lbal = fis[4]; | |
149 | tf->lbam = fis[5]; | |
150 | tf->lbah = fis[6]; | |
151 | tf->device = fis[7]; | |
152 | ||
153 | tf->hob_lbal = fis[8]; | |
154 | tf->hob_lbam = fis[9]; | |
155 | tf->hob_lbah = fis[10]; | |
156 | ||
157 | tf->nsect = fis[12]; | |
158 | tf->hob_nsect = fis[13]; | |
159 | } | |
160 | ||
8cbd6df1 AL |
161 | static const u8 ata_rw_cmds[] = { |
162 | /* pio multi */ | |
163 | ATA_CMD_READ_MULTI, | |
164 | ATA_CMD_WRITE_MULTI, | |
165 | ATA_CMD_READ_MULTI_EXT, | |
166 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
167 | 0, |
168 | 0, | |
169 | 0, | |
170 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
171 | /* pio */ |
172 | ATA_CMD_PIO_READ, | |
173 | ATA_CMD_PIO_WRITE, | |
174 | ATA_CMD_PIO_READ_EXT, | |
175 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
176 | 0, |
177 | 0, | |
178 | 0, | |
179 | 0, | |
8cbd6df1 AL |
180 | /* dma */ |
181 | ATA_CMD_READ, | |
182 | ATA_CMD_WRITE, | |
183 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
184 | ATA_CMD_WRITE_EXT, |
185 | 0, | |
186 | 0, | |
187 | 0, | |
188 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 189 | }; |
1da177e4 LT |
190 | |
191 | /** | |
8cbd6df1 AL |
192 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
193 | * @qc: command to examine and configure | |
1da177e4 | 194 | * |
2e9edbf8 | 195 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 196 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
197 | * |
198 | * LOCKING: | |
199 | * caller. | |
200 | */ | |
9a3dccc4 | 201 | int ata_rwcmd_protocol(struct ata_queued_cmd *qc) |
1da177e4 | 202 | { |
8cbd6df1 AL |
203 | struct ata_taskfile *tf = &qc->tf; |
204 | struct ata_device *dev = qc->dev; | |
9a3dccc4 | 205 | u8 cmd; |
1da177e4 | 206 | |
9a3dccc4 | 207 | int index, fua, lba48, write; |
2e9edbf8 | 208 | |
9a3dccc4 | 209 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
210 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
211 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 212 | |
8cbd6df1 AL |
213 | if (dev->flags & ATA_DFLAG_PIO) { |
214 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 215 | index = dev->multi_count ? 0 : 8; |
8d238e01 AC |
216 | } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) { |
217 | /* Unable to use DMA due to host limitation */ | |
218 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 219 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
220 | } else { |
221 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 222 | index = 16; |
8cbd6df1 | 223 | } |
1da177e4 | 224 | |
9a3dccc4 TH |
225 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
226 | if (cmd) { | |
227 | tf->command = cmd; | |
228 | return 0; | |
229 | } | |
230 | return -1; | |
1da177e4 LT |
231 | } |
232 | ||
cb95d562 TH |
233 | /** |
234 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
235 | * @pio_mask: pio_mask | |
236 | * @mwdma_mask: mwdma_mask | |
237 | * @udma_mask: udma_mask | |
238 | * | |
239 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
240 | * unsigned int xfer_mask. | |
241 | * | |
242 | * LOCKING: | |
243 | * None. | |
244 | * | |
245 | * RETURNS: | |
246 | * Packed xfer_mask. | |
247 | */ | |
248 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
249 | unsigned int mwdma_mask, | |
250 | unsigned int udma_mask) | |
251 | { | |
252 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
253 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
254 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
255 | } | |
256 | ||
c0489e4e TH |
257 | /** |
258 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
259 | * @xfer_mask: xfer_mask to unpack | |
260 | * @pio_mask: resulting pio_mask | |
261 | * @mwdma_mask: resulting mwdma_mask | |
262 | * @udma_mask: resulting udma_mask | |
263 | * | |
264 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
265 | * Any NULL distination masks will be ignored. | |
266 | */ | |
267 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
268 | unsigned int *pio_mask, | |
269 | unsigned int *mwdma_mask, | |
270 | unsigned int *udma_mask) | |
271 | { | |
272 | if (pio_mask) | |
273 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
274 | if (mwdma_mask) | |
275 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
276 | if (udma_mask) | |
277 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
278 | } | |
279 | ||
cb95d562 | 280 | static const struct ata_xfer_ent { |
be9a50c8 | 281 | int shift, bits; |
cb95d562 TH |
282 | u8 base; |
283 | } ata_xfer_tbl[] = { | |
284 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
285 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
286 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
287 | { -1, }, | |
288 | }; | |
289 | ||
290 | /** | |
291 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
292 | * @xfer_mask: xfer_mask of interest | |
293 | * | |
294 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
295 | * bit of @xfer_mask is considered. | |
296 | * | |
297 | * LOCKING: | |
298 | * None. | |
299 | * | |
300 | * RETURNS: | |
301 | * Matching XFER_* value, 0 if no match found. | |
302 | */ | |
303 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
304 | { | |
305 | int highbit = fls(xfer_mask) - 1; | |
306 | const struct ata_xfer_ent *ent; | |
307 | ||
308 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
309 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
310 | return ent->base + highbit - ent->shift; | |
311 | return 0; | |
312 | } | |
313 | ||
314 | /** | |
315 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
316 | * @xfer_mode: XFER_* of interest | |
317 | * | |
318 | * Return matching xfer_mask for @xfer_mode. | |
319 | * | |
320 | * LOCKING: | |
321 | * None. | |
322 | * | |
323 | * RETURNS: | |
324 | * Matching xfer_mask, 0 if no match found. | |
325 | */ | |
326 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
327 | { | |
328 | const struct ata_xfer_ent *ent; | |
329 | ||
330 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
331 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
332 | return 1 << (ent->shift + xfer_mode - ent->base); | |
333 | return 0; | |
334 | } | |
335 | ||
336 | /** | |
337 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
338 | * @xfer_mode: XFER_* of interest | |
339 | * | |
340 | * Return matching xfer_shift for @xfer_mode. | |
341 | * | |
342 | * LOCKING: | |
343 | * None. | |
344 | * | |
345 | * RETURNS: | |
346 | * Matching xfer_shift, -1 if no match found. | |
347 | */ | |
348 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
349 | { | |
350 | const struct ata_xfer_ent *ent; | |
351 | ||
352 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
353 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
354 | return ent->shift; | |
355 | return -1; | |
356 | } | |
357 | ||
1da177e4 | 358 | /** |
1da7b0d0 TH |
359 | * ata_mode_string - convert xfer_mask to string |
360 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
361 | * |
362 | * Determine string which represents the highest speed | |
1da7b0d0 | 363 | * (highest bit in @modemask). |
1da177e4 LT |
364 | * |
365 | * LOCKING: | |
366 | * None. | |
367 | * | |
368 | * RETURNS: | |
369 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 370 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 371 | */ |
1da7b0d0 | 372 | static const char *ata_mode_string(unsigned int xfer_mask) |
1da177e4 | 373 | { |
75f554bc TH |
374 | static const char * const xfer_mode_str[] = { |
375 | "PIO0", | |
376 | "PIO1", | |
377 | "PIO2", | |
378 | "PIO3", | |
379 | "PIO4", | |
380 | "MWDMA0", | |
381 | "MWDMA1", | |
382 | "MWDMA2", | |
383 | "UDMA/16", | |
384 | "UDMA/25", | |
385 | "UDMA/33", | |
386 | "UDMA/44", | |
387 | "UDMA/66", | |
388 | "UDMA/100", | |
389 | "UDMA/133", | |
390 | "UDMA7", | |
391 | }; | |
1da7b0d0 | 392 | int highbit; |
1da177e4 | 393 | |
1da7b0d0 TH |
394 | highbit = fls(xfer_mask) - 1; |
395 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
396 | return xfer_mode_str[highbit]; | |
1da177e4 | 397 | return "<n/a>"; |
1da177e4 LT |
398 | } |
399 | ||
4c360c81 TH |
400 | static const char *sata_spd_string(unsigned int spd) |
401 | { | |
402 | static const char * const spd_str[] = { | |
403 | "1.5 Gbps", | |
404 | "3.0 Gbps", | |
405 | }; | |
406 | ||
407 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
408 | return "<unknown>"; | |
409 | return spd_str[spd - 1]; | |
410 | } | |
411 | ||
3373efd8 | 412 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 413 | { |
e1211e3f | 414 | if (ata_dev_enabled(dev)) { |
f15a1daf | 415 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
0b8efb0a TH |
416 | dev->class++; |
417 | } | |
418 | } | |
419 | ||
1da177e4 LT |
420 | /** |
421 | * ata_pio_devchk - PATA device presence detection | |
422 | * @ap: ATA channel to examine | |
423 | * @device: Device to examine (starting at zero) | |
424 | * | |
425 | * This technique was originally described in | |
426 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
427 | * later found its way into the ATA/ATAPI spec. | |
428 | * | |
429 | * Write a pattern to the ATA shadow registers, | |
430 | * and if a device is present, it will respond by | |
431 | * correctly storing and echoing back the | |
432 | * ATA shadow register contents. | |
433 | * | |
434 | * LOCKING: | |
435 | * caller. | |
436 | */ | |
437 | ||
438 | static unsigned int ata_pio_devchk(struct ata_port *ap, | |
439 | unsigned int device) | |
440 | { | |
441 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
442 | u8 nsect, lbal; | |
443 | ||
444 | ap->ops->dev_select(ap, device); | |
445 | ||
446 | outb(0x55, ioaddr->nsect_addr); | |
447 | outb(0xaa, ioaddr->lbal_addr); | |
448 | ||
449 | outb(0xaa, ioaddr->nsect_addr); | |
450 | outb(0x55, ioaddr->lbal_addr); | |
451 | ||
452 | outb(0x55, ioaddr->nsect_addr); | |
453 | outb(0xaa, ioaddr->lbal_addr); | |
454 | ||
455 | nsect = inb(ioaddr->nsect_addr); | |
456 | lbal = inb(ioaddr->lbal_addr); | |
457 | ||
458 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
459 | return 1; /* we found a device */ | |
460 | ||
461 | return 0; /* nothing found */ | |
462 | } | |
463 | ||
464 | /** | |
465 | * ata_mmio_devchk - PATA device presence detection | |
466 | * @ap: ATA channel to examine | |
467 | * @device: Device to examine (starting at zero) | |
468 | * | |
469 | * This technique was originally described in | |
470 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
471 | * later found its way into the ATA/ATAPI spec. | |
472 | * | |
473 | * Write a pattern to the ATA shadow registers, | |
474 | * and if a device is present, it will respond by | |
475 | * correctly storing and echoing back the | |
476 | * ATA shadow register contents. | |
477 | * | |
478 | * LOCKING: | |
479 | * caller. | |
480 | */ | |
481 | ||
482 | static unsigned int ata_mmio_devchk(struct ata_port *ap, | |
483 | unsigned int device) | |
484 | { | |
485 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
486 | u8 nsect, lbal; | |
487 | ||
488 | ap->ops->dev_select(ap, device); | |
489 | ||
490 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
491 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
492 | ||
493 | writeb(0xaa, (void __iomem *) ioaddr->nsect_addr); | |
494 | writeb(0x55, (void __iomem *) ioaddr->lbal_addr); | |
495 | ||
496 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
497 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
498 | ||
499 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
500 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
501 | ||
502 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
503 | return 1; /* we found a device */ | |
504 | ||
505 | return 0; /* nothing found */ | |
506 | } | |
507 | ||
508 | /** | |
509 | * ata_devchk - PATA device presence detection | |
510 | * @ap: ATA channel to examine | |
511 | * @device: Device to examine (starting at zero) | |
512 | * | |
513 | * Dispatch ATA device presence detection, depending | |
514 | * on whether we are using PIO or MMIO to talk to the | |
515 | * ATA shadow registers. | |
516 | * | |
517 | * LOCKING: | |
518 | * caller. | |
519 | */ | |
520 | ||
521 | static unsigned int ata_devchk(struct ata_port *ap, | |
522 | unsigned int device) | |
523 | { | |
524 | if (ap->flags & ATA_FLAG_MMIO) | |
525 | return ata_mmio_devchk(ap, device); | |
526 | return ata_pio_devchk(ap, device); | |
527 | } | |
528 | ||
529 | /** | |
530 | * ata_dev_classify - determine device type based on ATA-spec signature | |
531 | * @tf: ATA taskfile register set for device to be identified | |
532 | * | |
533 | * Determine from taskfile register contents whether a device is | |
534 | * ATA or ATAPI, as per "Signature and persistence" section | |
535 | * of ATA/PI spec (volume 1, sect 5.14). | |
536 | * | |
537 | * LOCKING: | |
538 | * None. | |
539 | * | |
540 | * RETURNS: | |
541 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN | |
542 | * the event of failure. | |
543 | */ | |
544 | ||
057ace5e | 545 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
546 | { |
547 | /* Apple's open source Darwin code hints that some devices only | |
548 | * put a proper signature into the LBA mid/high registers, | |
549 | * So, we only check those. It's sufficient for uniqueness. | |
550 | */ | |
551 | ||
552 | if (((tf->lbam == 0) && (tf->lbah == 0)) || | |
553 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { | |
554 | DPRINTK("found ATA device by sig\n"); | |
555 | return ATA_DEV_ATA; | |
556 | } | |
557 | ||
558 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || | |
559 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { | |
560 | DPRINTK("found ATAPI device by sig\n"); | |
561 | return ATA_DEV_ATAPI; | |
562 | } | |
563 | ||
564 | DPRINTK("unknown device\n"); | |
565 | return ATA_DEV_UNKNOWN; | |
566 | } | |
567 | ||
568 | /** | |
569 | * ata_dev_try_classify - Parse returned ATA device signature | |
570 | * @ap: ATA channel to examine | |
571 | * @device: Device to examine (starting at zero) | |
b4dc7623 | 572 | * @r_err: Value of error register on completion |
1da177e4 LT |
573 | * |
574 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
575 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
576 | * shadow registers, indicating the results of device detection | |
577 | * and diagnostics. | |
578 | * | |
579 | * Select the ATA device, and read the values from the ATA shadow | |
580 | * registers. Then parse according to the Error register value, | |
581 | * and the spec-defined values examined by ata_dev_classify(). | |
582 | * | |
583 | * LOCKING: | |
584 | * caller. | |
b4dc7623 TH |
585 | * |
586 | * RETURNS: | |
587 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 LT |
588 | */ |
589 | ||
b4dc7623 TH |
590 | static unsigned int |
591 | ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) | |
1da177e4 | 592 | { |
1da177e4 LT |
593 | struct ata_taskfile tf; |
594 | unsigned int class; | |
595 | u8 err; | |
596 | ||
597 | ap->ops->dev_select(ap, device); | |
598 | ||
599 | memset(&tf, 0, sizeof(tf)); | |
600 | ||
1da177e4 | 601 | ap->ops->tf_read(ap, &tf); |
0169e284 | 602 | err = tf.feature; |
b4dc7623 TH |
603 | if (r_err) |
604 | *r_err = err; | |
1da177e4 LT |
605 | |
606 | /* see if device passed diags */ | |
607 | if (err == 1) | |
608 | /* do nothing */ ; | |
609 | else if ((device == 0) && (err == 0x81)) | |
610 | /* do nothing */ ; | |
611 | else | |
b4dc7623 | 612 | return ATA_DEV_NONE; |
1da177e4 | 613 | |
b4dc7623 | 614 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 615 | class = ata_dev_classify(&tf); |
b4dc7623 | 616 | |
1da177e4 | 617 | if (class == ATA_DEV_UNKNOWN) |
b4dc7623 | 618 | return ATA_DEV_NONE; |
1da177e4 | 619 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
b4dc7623 TH |
620 | return ATA_DEV_NONE; |
621 | return class; | |
1da177e4 LT |
622 | } |
623 | ||
624 | /** | |
6a62a04d | 625 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
626 | * @id: IDENTIFY DEVICE results we will examine |
627 | * @s: string into which data is output | |
628 | * @ofs: offset into identify device page | |
629 | * @len: length of string to return. must be an even number. | |
630 | * | |
631 | * The strings in the IDENTIFY DEVICE page are broken up into | |
632 | * 16-bit chunks. Run through the string, and output each | |
633 | * 8-bit chunk linearly, regardless of platform. | |
634 | * | |
635 | * LOCKING: | |
636 | * caller. | |
637 | */ | |
638 | ||
6a62a04d TH |
639 | void ata_id_string(const u16 *id, unsigned char *s, |
640 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
641 | { |
642 | unsigned int c; | |
643 | ||
644 | while (len > 0) { | |
645 | c = id[ofs] >> 8; | |
646 | *s = c; | |
647 | s++; | |
648 | ||
649 | c = id[ofs] & 0xff; | |
650 | *s = c; | |
651 | s++; | |
652 | ||
653 | ofs++; | |
654 | len -= 2; | |
655 | } | |
656 | } | |
657 | ||
0e949ff3 | 658 | /** |
6a62a04d | 659 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
660 | * @id: IDENTIFY DEVICE results we will examine |
661 | * @s: string into which data is output | |
662 | * @ofs: offset into identify device page | |
663 | * @len: length of string to return. must be an odd number. | |
664 | * | |
6a62a04d | 665 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
666 | * trims trailing spaces and terminates the resulting string with |
667 | * null. @len must be actual maximum length (even number) + 1. | |
668 | * | |
669 | * LOCKING: | |
670 | * caller. | |
671 | */ | |
6a62a04d TH |
672 | void ata_id_c_string(const u16 *id, unsigned char *s, |
673 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
674 | { |
675 | unsigned char *p; | |
676 | ||
677 | WARN_ON(!(len & 1)); | |
678 | ||
6a62a04d | 679 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
680 | |
681 | p = s + strnlen(s, len - 1); | |
682 | while (p > s && p[-1] == ' ') | |
683 | p--; | |
684 | *p = '\0'; | |
685 | } | |
0baab86b | 686 | |
2940740b TH |
687 | static u64 ata_id_n_sectors(const u16 *id) |
688 | { | |
689 | if (ata_id_has_lba(id)) { | |
690 | if (ata_id_has_lba48(id)) | |
691 | return ata_id_u64(id, 100); | |
692 | else | |
693 | return ata_id_u32(id, 60); | |
694 | } else { | |
695 | if (ata_id_current_chs_valid(id)) | |
696 | return ata_id_u32(id, 57); | |
697 | else | |
698 | return id[1] * id[3] * id[6]; | |
699 | } | |
700 | } | |
701 | ||
0baab86b EF |
702 | /** |
703 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
704 | * @ap: ATA channel to manipulate | |
705 | * @device: ATA device (numbered from zero) to select | |
706 | * | |
707 | * This function performs no actual function. | |
708 | * | |
709 | * May be used as the dev_select() entry in ata_port_operations. | |
710 | * | |
711 | * LOCKING: | |
712 | * caller. | |
713 | */ | |
1da177e4 LT |
714 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
715 | { | |
716 | } | |
717 | ||
0baab86b | 718 | |
1da177e4 LT |
719 | /** |
720 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
721 | * @ap: ATA channel to manipulate | |
722 | * @device: ATA device (numbered from zero) to select | |
723 | * | |
724 | * Use the method defined in the ATA specification to | |
725 | * make either device 0, or device 1, active on the | |
0baab86b EF |
726 | * ATA channel. Works with both PIO and MMIO. |
727 | * | |
728 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
729 | * |
730 | * LOCKING: | |
731 | * caller. | |
732 | */ | |
733 | ||
734 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
735 | { | |
736 | u8 tmp; | |
737 | ||
738 | if (device == 0) | |
739 | tmp = ATA_DEVICE_OBS; | |
740 | else | |
741 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
742 | ||
743 | if (ap->flags & ATA_FLAG_MMIO) { | |
744 | writeb(tmp, (void __iomem *) ap->ioaddr.device_addr); | |
745 | } else { | |
746 | outb(tmp, ap->ioaddr.device_addr); | |
747 | } | |
748 | ata_pause(ap); /* needed; also flushes, for mmio */ | |
749 | } | |
750 | ||
751 | /** | |
752 | * ata_dev_select - Select device 0/1 on ATA bus | |
753 | * @ap: ATA channel to manipulate | |
754 | * @device: ATA device (numbered from zero) to select | |
755 | * @wait: non-zero to wait for Status register BSY bit to clear | |
756 | * @can_sleep: non-zero if context allows sleeping | |
757 | * | |
758 | * Use the method defined in the ATA specification to | |
759 | * make either device 0, or device 1, active on the | |
760 | * ATA channel. | |
761 | * | |
762 | * This is a high-level version of ata_std_dev_select(), | |
763 | * which additionally provides the services of inserting | |
764 | * the proper pauses and status polling, where needed. | |
765 | * | |
766 | * LOCKING: | |
767 | * caller. | |
768 | */ | |
769 | ||
770 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
771 | unsigned int wait, unsigned int can_sleep) | |
772 | { | |
773 | VPRINTK("ENTER, ata%u: device %u, wait %u\n", | |
774 | ap->id, device, wait); | |
775 | ||
776 | if (wait) | |
777 | ata_wait_idle(ap); | |
778 | ||
779 | ap->ops->dev_select(ap, device); | |
780 | ||
781 | if (wait) { | |
782 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) | |
783 | msleep(150); | |
784 | ata_wait_idle(ap); | |
785 | } | |
786 | } | |
787 | ||
788 | /** | |
789 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 790 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 791 | * |
0bd3300a TH |
792 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
793 | * page. | |
1da177e4 LT |
794 | * |
795 | * LOCKING: | |
796 | * caller. | |
797 | */ | |
798 | ||
0bd3300a | 799 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
800 | { |
801 | DPRINTK("49==0x%04x " | |
802 | "53==0x%04x " | |
803 | "63==0x%04x " | |
804 | "64==0x%04x " | |
805 | "75==0x%04x \n", | |
0bd3300a TH |
806 | id[49], |
807 | id[53], | |
808 | id[63], | |
809 | id[64], | |
810 | id[75]); | |
1da177e4 LT |
811 | DPRINTK("80==0x%04x " |
812 | "81==0x%04x " | |
813 | "82==0x%04x " | |
814 | "83==0x%04x " | |
815 | "84==0x%04x \n", | |
0bd3300a TH |
816 | id[80], |
817 | id[81], | |
818 | id[82], | |
819 | id[83], | |
820 | id[84]); | |
1da177e4 LT |
821 | DPRINTK("88==0x%04x " |
822 | "93==0x%04x\n", | |
0bd3300a TH |
823 | id[88], |
824 | id[93]); | |
1da177e4 LT |
825 | } |
826 | ||
cb95d562 TH |
827 | /** |
828 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
829 | * @id: IDENTIFY data to compute xfer mask from | |
830 | * | |
831 | * Compute the xfermask for this device. This is not as trivial | |
832 | * as it seems if we must consider early devices correctly. | |
833 | * | |
834 | * FIXME: pre IDE drive timing (do we care ?). | |
835 | * | |
836 | * LOCKING: | |
837 | * None. | |
838 | * | |
839 | * RETURNS: | |
840 | * Computed xfermask | |
841 | */ | |
842 | static unsigned int ata_id_xfermask(const u16 *id) | |
843 | { | |
844 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
845 | ||
846 | /* Usual case. Word 53 indicates word 64 is valid */ | |
847 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
848 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
849 | pio_mask <<= 3; | |
850 | pio_mask |= 0x7; | |
851 | } else { | |
852 | /* If word 64 isn't valid then Word 51 high byte holds | |
853 | * the PIO timing number for the maximum. Turn it into | |
854 | * a mask. | |
855 | */ | |
856 | pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ; | |
857 | ||
858 | /* But wait.. there's more. Design your standards by | |
859 | * committee and you too can get a free iordy field to | |
860 | * process. However its the speeds not the modes that | |
861 | * are supported... Note drivers using the timing API | |
862 | * will get this right anyway | |
863 | */ | |
864 | } | |
865 | ||
866 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 TH |
867 | |
868 | udma_mask = 0; | |
869 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
870 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
871 | |
872 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
873 | } | |
874 | ||
86e45b6b TH |
875 | /** |
876 | * ata_port_queue_task - Queue port_task | |
877 | * @ap: The ata_port to queue port_task for | |
878 | * | |
879 | * Schedule @fn(@data) for execution after @delay jiffies using | |
880 | * port_task. There is one port_task per port and it's the | |
881 | * user(low level driver)'s responsibility to make sure that only | |
882 | * one task is active at any given time. | |
883 | * | |
884 | * libata core layer takes care of synchronization between | |
885 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
886 | * synchronization. | |
887 | * | |
888 | * LOCKING: | |
889 | * Inherited from caller. | |
890 | */ | |
891 | void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data, | |
892 | unsigned long delay) | |
893 | { | |
894 | int rc; | |
895 | ||
2e755f68 | 896 | if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK) |
86e45b6b TH |
897 | return; |
898 | ||
899 | PREPARE_WORK(&ap->port_task, fn, data); | |
900 | ||
901 | if (!delay) | |
902 | rc = queue_work(ata_wq, &ap->port_task); | |
903 | else | |
904 | rc = queue_delayed_work(ata_wq, &ap->port_task, delay); | |
905 | ||
906 | /* rc == 0 means that another user is using port task */ | |
907 | WARN_ON(rc == 0); | |
908 | } | |
909 | ||
910 | /** | |
911 | * ata_port_flush_task - Flush port_task | |
912 | * @ap: The ata_port to flush port_task for | |
913 | * | |
914 | * After this function completes, port_task is guranteed not to | |
915 | * be running or scheduled. | |
916 | * | |
917 | * LOCKING: | |
918 | * Kernel thread context (may sleep) | |
919 | */ | |
920 | void ata_port_flush_task(struct ata_port *ap) | |
921 | { | |
922 | unsigned long flags; | |
923 | ||
924 | DPRINTK("ENTER\n"); | |
925 | ||
926 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
2e755f68 | 927 | ap->flags |= ATA_FLAG_FLUSH_PORT_TASK; |
86e45b6b TH |
928 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
929 | ||
930 | DPRINTK("flush #1\n"); | |
931 | flush_workqueue(ata_wq); | |
932 | ||
933 | /* | |
934 | * At this point, if a task is running, it's guaranteed to see | |
935 | * the FLUSH flag; thus, it will never queue pio tasks again. | |
936 | * Cancel and flush. | |
937 | */ | |
938 | if (!cancel_delayed_work(&ap->port_task)) { | |
939 | DPRINTK("flush #2\n"); | |
940 | flush_workqueue(ata_wq); | |
941 | } | |
942 | ||
943 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
2e755f68 | 944 | ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK; |
86e45b6b TH |
945 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
946 | ||
947 | DPRINTK("EXIT\n"); | |
948 | } | |
949 | ||
77853bf2 | 950 | void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 951 | { |
77853bf2 | 952 | struct completion *waiting = qc->private_data; |
a2a7a662 | 953 | |
a2a7a662 | 954 | complete(waiting); |
a2a7a662 TH |
955 | } |
956 | ||
957 | /** | |
958 | * ata_exec_internal - execute libata internal command | |
a2a7a662 TH |
959 | * @dev: Device to which the command is sent |
960 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 961 | * @cdb: CDB for packet command |
a2a7a662 TH |
962 | * @dma_dir: Data tranfer direction of the command |
963 | * @buf: Data buffer of the command | |
964 | * @buflen: Length of data buffer | |
965 | * | |
966 | * Executes libata internal command with timeout. @tf contains | |
967 | * command on entry and result on return. Timeout and error | |
968 | * conditions are reported via return value. No recovery action | |
969 | * is taken after a command times out. It's caller's duty to | |
970 | * clean up after timeout. | |
971 | * | |
972 | * LOCKING: | |
973 | * None. Should be called with kernel context, might sleep. | |
974 | */ | |
975 | ||
3373efd8 | 976 | unsigned ata_exec_internal(struct ata_device *dev, |
1ad8e7f9 TH |
977 | struct ata_taskfile *tf, const u8 *cdb, |
978 | int dma_dir, void *buf, unsigned int buflen) | |
a2a7a662 | 979 | { |
3373efd8 | 980 | struct ata_port *ap = dev->ap; |
a2a7a662 TH |
981 | u8 command = tf->command; |
982 | struct ata_queued_cmd *qc; | |
2ab7db1f | 983 | unsigned int tag, preempted_tag; |
a2a7a662 TH |
984 | DECLARE_COMPLETION(wait); |
985 | unsigned long flags; | |
77853bf2 | 986 | unsigned int err_mask; |
d95a717f | 987 | int rc; |
a2a7a662 TH |
988 | |
989 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
990 | ||
e3180499 TH |
991 | /* no internal command while frozen */ |
992 | if (ap->flags & ATA_FLAG_FROZEN) { | |
993 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
994 | return AC_ERR_SYSTEM; | |
995 | } | |
996 | ||
2ab7db1f | 997 | /* initialize internal qc */ |
a2a7a662 | 998 | |
2ab7db1f TH |
999 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1000 | * drivers choke if any other tag is given. This breaks | |
1001 | * ata_tag_internal() test for those drivers. Don't use new | |
1002 | * EH stuff without converting to it. | |
1003 | */ | |
1004 | if (ap->ops->error_handler) | |
1005 | tag = ATA_TAG_INTERNAL; | |
1006 | else | |
1007 | tag = 0; | |
1008 | ||
6cec4a39 | 1009 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
2ab7db1f | 1010 | BUG(); |
f69499f4 | 1011 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1012 | |
1013 | qc->tag = tag; | |
1014 | qc->scsicmd = NULL; | |
1015 | qc->ap = ap; | |
1016 | qc->dev = dev; | |
1017 | ata_qc_reinit(qc); | |
1018 | ||
1019 | preempted_tag = ap->active_tag; | |
1020 | ap->active_tag = ATA_TAG_POISON; | |
1021 | ||
1022 | /* prepare & issue qc */ | |
a2a7a662 | 1023 | qc->tf = *tf; |
d69cf37d TH |
1024 | if (cdb) |
1025 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1026 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1027 | qc->dma_dir = dma_dir; |
1028 | if (dma_dir != DMA_NONE) { | |
1029 | ata_sg_init_one(qc, buf, buflen); | |
1030 | qc->nsect = buflen / ATA_SECT_SIZE; | |
1031 | } | |
1032 | ||
77853bf2 | 1033 | qc->private_data = &wait; |
a2a7a662 TH |
1034 | qc->complete_fn = ata_qc_complete_internal; |
1035 | ||
8e0e694a | 1036 | ata_qc_issue(qc); |
a2a7a662 TH |
1037 | |
1038 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1039 | ||
d95a717f TH |
1040 | rc = wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL); |
1041 | ||
1042 | ata_port_flush_task(ap); | |
41ade50c | 1043 | |
d95a717f | 1044 | if (!rc) { |
a2a7a662 TH |
1045 | spin_lock_irqsave(&ap->host_set->lock, flags); |
1046 | ||
1047 | /* We're racing with irq here. If we lose, the | |
1048 | * following test prevents us from completing the qc | |
d95a717f TH |
1049 | * twice. If we win, the port is frozen and will be |
1050 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1051 | */ |
77853bf2 | 1052 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1053 | qc->err_mask |= AC_ERR_TIMEOUT; |
1054 | ||
1055 | if (ap->ops->error_handler) | |
1056 | ata_port_freeze(ap); | |
1057 | else | |
1058 | ata_qc_complete(qc); | |
f15a1daf TH |
1059 | |
1060 | ata_dev_printk(dev, KERN_WARNING, | |
1061 | "qc timeout (cmd 0x%x)\n", command); | |
a2a7a662 TH |
1062 | } |
1063 | ||
1064 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1065 | } | |
1066 | ||
d95a717f TH |
1067 | /* do post_internal_cmd */ |
1068 | if (ap->ops->post_internal_cmd) | |
1069 | ap->ops->post_internal_cmd(qc); | |
1070 | ||
1071 | if (qc->flags & ATA_QCFLAG_FAILED && !qc->err_mask) { | |
1072 | ata_dev_printk(dev, KERN_WARNING, "zero err_mask for failed " | |
1073 | "internal command, assuming AC_ERR_OTHER\n"); | |
1074 | qc->err_mask |= AC_ERR_OTHER; | |
1075 | } | |
1076 | ||
15869303 TH |
1077 | /* finish up */ |
1078 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
1079 | ||
e61e0672 | 1080 | *tf = qc->result_tf; |
77853bf2 TH |
1081 | err_mask = qc->err_mask; |
1082 | ||
1083 | ata_qc_free(qc); | |
2ab7db1f | 1084 | ap->active_tag = preempted_tag; |
77853bf2 | 1085 | |
1f7dd3e9 TH |
1086 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1087 | * Until those drivers are fixed, we detect the condition | |
1088 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1089 | * port. | |
1090 | * | |
1091 | * Note that this doesn't change any behavior as internal | |
1092 | * command failure results in disabling the device in the | |
1093 | * higher layer for LLDDs without new reset/EH callbacks. | |
1094 | * | |
1095 | * Kill the following code as soon as those drivers are fixed. | |
1096 | */ | |
198e0fed | 1097 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1098 | err_mask |= AC_ERR_SYSTEM; |
1099 | ata_port_probe(ap); | |
1100 | } | |
1101 | ||
15869303 TH |
1102 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
1103 | ||
77853bf2 | 1104 | return err_mask; |
a2a7a662 TH |
1105 | } |
1106 | ||
1bc4ccff AC |
1107 | /** |
1108 | * ata_pio_need_iordy - check if iordy needed | |
1109 | * @adev: ATA device | |
1110 | * | |
1111 | * Check if the current speed of the device requires IORDY. Used | |
1112 | * by various controllers for chip configuration. | |
1113 | */ | |
1114 | ||
1115 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) | |
1116 | { | |
1117 | int pio; | |
1118 | int speed = adev->pio_mode - XFER_PIO_0; | |
1119 | ||
1120 | if (speed < 2) | |
1121 | return 0; | |
1122 | if (speed > 2) | |
1123 | return 1; | |
2e9edbf8 | 1124 | |
1bc4ccff AC |
1125 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1126 | ||
1127 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ | |
1128 | pio = adev->id[ATA_ID_EIDE_PIO]; | |
1129 | /* Is the speed faster than the drive allows non IORDY ? */ | |
1130 | if (pio) { | |
1131 | /* This is cycle times not frequency - watch the logic! */ | |
1132 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
1133 | return 1; | |
1134 | return 0; | |
1135 | } | |
1136 | } | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1da177e4 | 1140 | /** |
49016aca | 1141 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1142 | * @dev: target device |
1143 | * @p_class: pointer to class of the target device (may be changed) | |
1144 | * @post_reset: is this read ID post-reset? | |
fe635c7e | 1145 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1146 | * |
49016aca TH |
1147 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1148 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1149 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1150 | * for pre-ATA4 drives. | |
1da177e4 LT |
1151 | * |
1152 | * LOCKING: | |
49016aca TH |
1153 | * Kernel thread context (may sleep) |
1154 | * | |
1155 | * RETURNS: | |
1156 | * 0 on success, -errno otherwise. | |
1da177e4 | 1157 | */ |
3373efd8 TH |
1158 | static int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
1159 | int post_reset, u16 *id) | |
1da177e4 | 1160 | { |
3373efd8 | 1161 | struct ata_port *ap = dev->ap; |
49016aca | 1162 | unsigned int class = *p_class; |
a0123703 | 1163 | struct ata_taskfile tf; |
49016aca TH |
1164 | unsigned int err_mask = 0; |
1165 | const char *reason; | |
1166 | int rc; | |
1da177e4 | 1167 | |
49016aca | 1168 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 | 1169 | |
49016aca | 1170 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
1da177e4 | 1171 | |
49016aca | 1172 | retry: |
3373efd8 | 1173 | ata_tf_init(dev, &tf); |
a0123703 | 1174 | |
49016aca TH |
1175 | switch (class) { |
1176 | case ATA_DEV_ATA: | |
a0123703 | 1177 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1178 | break; |
1179 | case ATA_DEV_ATAPI: | |
a0123703 | 1180 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1181 | break; |
1182 | default: | |
1183 | rc = -ENODEV; | |
1184 | reason = "unsupported class"; | |
1185 | goto err_out; | |
1da177e4 LT |
1186 | } |
1187 | ||
a0123703 | 1188 | tf.protocol = ATA_PROT_PIO; |
1da177e4 | 1189 | |
3373efd8 | 1190 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
49016aca | 1191 | id, sizeof(id[0]) * ATA_ID_WORDS); |
a0123703 | 1192 | if (err_mask) { |
49016aca TH |
1193 | rc = -EIO; |
1194 | reason = "I/O error"; | |
1da177e4 LT |
1195 | goto err_out; |
1196 | } | |
1197 | ||
49016aca | 1198 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1199 | |
49016aca | 1200 | /* sanity check */ |
692785e7 | 1201 | if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) { |
49016aca TH |
1202 | rc = -EINVAL; |
1203 | reason = "device reports illegal type"; | |
1204 | goto err_out; | |
1205 | } | |
1206 | ||
1207 | if (post_reset && class == ATA_DEV_ATA) { | |
1208 | /* | |
1209 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1210 | * SRST RESET | |
1211 | * IDENTIFY | |
1212 | * INITIALIZE DEVICE PARAMETERS | |
1213 | * anything else.. | |
1214 | * Some drives were very specific about that exact sequence. | |
1215 | */ | |
1216 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 1217 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
1218 | if (err_mask) { |
1219 | rc = -EIO; | |
1220 | reason = "INIT_DEV_PARAMS failed"; | |
1221 | goto err_out; | |
1222 | } | |
1223 | ||
1224 | /* current CHS translation info (id[53-58]) might be | |
1225 | * changed. reread the identify device info. | |
1226 | */ | |
1227 | post_reset = 0; | |
1228 | goto retry; | |
1229 | } | |
1230 | } | |
1231 | ||
1232 | *p_class = class; | |
fe635c7e | 1233 | |
49016aca TH |
1234 | return 0; |
1235 | ||
1236 | err_out: | |
f15a1daf TH |
1237 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
1238 | "(%s, err_mask=0x%x)\n", reason, err_mask); | |
49016aca TH |
1239 | return rc; |
1240 | } | |
1241 | ||
3373efd8 | 1242 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 1243 | { |
3373efd8 | 1244 | return ((dev->ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
4b2f3ede TH |
1245 | } |
1246 | ||
49016aca | 1247 | /** |
ffeae418 | 1248 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 | 1249 | * @dev: Target device to configure |
4c2d721a | 1250 | * @print_info: Enable device info printout |
ffeae418 TH |
1251 | * |
1252 | * Configure @dev according to @dev->id. Generic and low-level | |
1253 | * driver specific fixups are also applied. | |
49016aca TH |
1254 | * |
1255 | * LOCKING: | |
ffeae418 TH |
1256 | * Kernel thread context (may sleep) |
1257 | * | |
1258 | * RETURNS: | |
1259 | * 0 on success, -errno otherwise | |
49016aca | 1260 | */ |
3373efd8 | 1261 | static int ata_dev_configure(struct ata_device *dev, int print_info) |
49016aca | 1262 | { |
3373efd8 | 1263 | struct ata_port *ap = dev->ap; |
1148c3a7 | 1264 | const u16 *id = dev->id; |
ff8854b2 | 1265 | unsigned int xfer_mask; |
49016aca TH |
1266 | int i, rc; |
1267 | ||
e1211e3f | 1268 | if (!ata_dev_enabled(dev)) { |
49016aca | 1269 | DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n", |
ffeae418 TH |
1270 | ap->id, dev->devno); |
1271 | return 0; | |
49016aca TH |
1272 | } |
1273 | ||
ffeae418 | 1274 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 | 1275 | |
c39f5ebe TH |
1276 | /* print device capabilities */ |
1277 | if (print_info) | |
f15a1daf TH |
1278 | ata_dev_printk(dev, KERN_DEBUG, "cfg 49:%04x 82:%04x 83:%04x " |
1279 | "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", | |
1280 | id[49], id[82], id[83], id[84], | |
1281 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 1282 | |
208a9933 | 1283 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 1284 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
1285 | dev->max_sectors = 0; |
1286 | dev->cdb_len = 0; | |
1287 | dev->n_sectors = 0; | |
1288 | dev->cylinders = 0; | |
1289 | dev->heads = 0; | |
1290 | dev->sectors = 0; | |
1291 | ||
1da177e4 LT |
1292 | /* |
1293 | * common ATA, ATAPI feature tests | |
1294 | */ | |
1295 | ||
ff8854b2 | 1296 | /* find max transfer mode; for printk only */ |
1148c3a7 | 1297 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 1298 | |
1148c3a7 | 1299 | ata_dump_id(id); |
1da177e4 LT |
1300 | |
1301 | /* ATA-specific feature tests */ | |
1302 | if (dev->class == ATA_DEV_ATA) { | |
1148c3a7 | 1303 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 1304 | |
1148c3a7 | 1305 | if (ata_id_has_lba(id)) { |
4c2d721a | 1306 | const char *lba_desc; |
8bf62ece | 1307 | |
4c2d721a TH |
1308 | lba_desc = "LBA"; |
1309 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 1310 | if (ata_id_has_lba48(id)) { |
8bf62ece | 1311 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a TH |
1312 | lba_desc = "LBA48"; |
1313 | } | |
8bf62ece AL |
1314 | |
1315 | /* print device info to dmesg */ | |
4c2d721a | 1316 | if (print_info) |
f15a1daf TH |
1317 | ata_dev_printk(dev, KERN_INFO, "ATA-%d, " |
1318 | "max %s, %Lu sectors: %s\n", | |
1319 | ata_id_major_version(id), | |
1320 | ata_mode_string(xfer_mask), | |
1321 | (unsigned long long)dev->n_sectors, | |
1322 | lba_desc); | |
ffeae418 | 1323 | } else { |
8bf62ece AL |
1324 | /* CHS */ |
1325 | ||
1326 | /* Default translation */ | |
1148c3a7 TH |
1327 | dev->cylinders = id[1]; |
1328 | dev->heads = id[3]; | |
1329 | dev->sectors = id[6]; | |
8bf62ece | 1330 | |
1148c3a7 | 1331 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 1332 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
1333 | dev->cylinders = id[54]; |
1334 | dev->heads = id[55]; | |
1335 | dev->sectors = id[56]; | |
8bf62ece AL |
1336 | } |
1337 | ||
1338 | /* print device info to dmesg */ | |
4c2d721a | 1339 | if (print_info) |
f15a1daf TH |
1340 | ata_dev_printk(dev, KERN_INFO, "ATA-%d, " |
1341 | "max %s, %Lu sectors: CHS %u/%u/%u\n", | |
1342 | ata_id_major_version(id), | |
1343 | ata_mode_string(xfer_mask), | |
1344 | (unsigned long long)dev->n_sectors, | |
1345 | dev->cylinders, dev->heads, dev->sectors); | |
1da177e4 LT |
1346 | } |
1347 | ||
07f6f7d0 AL |
1348 | if (dev->id[59] & 0x100) { |
1349 | dev->multi_count = dev->id[59] & 0xff; | |
1350 | DPRINTK("ata%u: dev %u multi count %u\n", | |
999bb6f4 | 1351 | ap->id, dev->devno, dev->multi_count); |
07f6f7d0 AL |
1352 | } |
1353 | ||
6e7846e9 | 1354 | dev->cdb_len = 16; |
1da177e4 LT |
1355 | } |
1356 | ||
1357 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 1358 | else if (dev->class == ATA_DEV_ATAPI) { |
08a556db AL |
1359 | char *cdb_intr_string = ""; |
1360 | ||
1148c3a7 | 1361 | rc = atapi_cdb_len(id); |
1da177e4 | 1362 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
f15a1daf TH |
1363 | ata_dev_printk(dev, KERN_WARNING, |
1364 | "unsupported CDB len\n"); | |
ffeae418 | 1365 | rc = -EINVAL; |
1da177e4 LT |
1366 | goto err_out_nosup; |
1367 | } | |
6e7846e9 | 1368 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 1369 | |
08a556db | 1370 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 1371 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
1372 | cdb_intr_string = ", CDB intr"; |
1373 | } | |
312f7da2 | 1374 | |
1da177e4 | 1375 | /* print device info to dmesg */ |
4c2d721a | 1376 | if (print_info) |
12436c30 TH |
1377 | ata_dev_printk(dev, KERN_INFO, "ATAPI, max %s%s\n", |
1378 | ata_mode_string(xfer_mask), | |
1379 | cdb_intr_string); | |
1da177e4 LT |
1380 | } |
1381 | ||
6e7846e9 TH |
1382 | ap->host->max_cmd_len = 0; |
1383 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1384 | ap->host->max_cmd_len = max_t(unsigned int, | |
1385 | ap->host->max_cmd_len, | |
1386 | ap->device[i].cdb_len); | |
1387 | ||
4b2f3ede | 1388 | /* limit bridge transfers to udma5, 200 sectors */ |
3373efd8 | 1389 | if (ata_dev_knobble(dev)) { |
4c2d721a | 1390 | if (print_info) |
f15a1daf TH |
1391 | ata_dev_printk(dev, KERN_INFO, |
1392 | "applying bridge limits\n"); | |
5a529139 | 1393 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
1394 | dev->max_sectors = ATA_MAX_SECTORS; |
1395 | } | |
1396 | ||
1397 | if (ap->ops->dev_config) | |
1398 | ap->ops->dev_config(ap, dev); | |
1399 | ||
1da177e4 | 1400 | DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap)); |
ffeae418 | 1401 | return 0; |
1da177e4 LT |
1402 | |
1403 | err_out_nosup: | |
1da177e4 | 1404 | DPRINTK("EXIT, err\n"); |
ffeae418 | 1405 | return rc; |
1da177e4 LT |
1406 | } |
1407 | ||
1408 | /** | |
1409 | * ata_bus_probe - Reset and probe ATA bus | |
1410 | * @ap: Bus to probe | |
1411 | * | |
0cba632b JG |
1412 | * Master ATA bus probing function. Initiates a hardware-dependent |
1413 | * bus reset, then attempts to identify any devices found on | |
1414 | * the bus. | |
1415 | * | |
1da177e4 | 1416 | * LOCKING: |
0cba632b | 1417 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1418 | * |
1419 | * RETURNS: | |
96072e69 | 1420 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
1421 | */ |
1422 | ||
1423 | static int ata_bus_probe(struct ata_port *ap) | |
1424 | { | |
28ca5c57 | 1425 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 TH |
1426 | int tries[ATA_MAX_DEVICES]; |
1427 | int i, rc, down_xfermask; | |
e82cbdb9 | 1428 | struct ata_device *dev; |
1da177e4 | 1429 | |
28ca5c57 | 1430 | ata_port_probe(ap); |
c19ba8af | 1431 | |
14d2bac1 TH |
1432 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1433 | tries[i] = ATA_PROBE_MAX_TRIES; | |
1434 | ||
1435 | retry: | |
1436 | down_xfermask = 0; | |
1437 | ||
2044470c TH |
1438 | /* reset and determine device classes */ |
1439 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1440 | classes[i] = ATA_DEV_UNKNOWN; | |
2061a47a | 1441 | |
2044470c | 1442 | if (ap->ops->probe_reset) { |
c19ba8af | 1443 | rc = ap->ops->probe_reset(ap, classes); |
28ca5c57 | 1444 | if (rc) { |
f15a1daf TH |
1445 | ata_port_printk(ap, KERN_ERR, |
1446 | "reset failed (errno=%d)\n", rc); | |
28ca5c57 | 1447 | return rc; |
c19ba8af | 1448 | } |
28ca5c57 | 1449 | } else { |
c19ba8af TH |
1450 | ap->ops->phy_reset(ap); |
1451 | ||
f8c2c420 TH |
1452 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
1453 | if (!(ap->flags & ATA_FLAG_DISABLED)) | |
28ca5c57 | 1454 | classes[i] = ap->device[i].class; |
f8c2c420 TH |
1455 | ap->device[i].class = ATA_DEV_UNKNOWN; |
1456 | } | |
2044470c | 1457 | |
28ca5c57 TH |
1458 | ata_port_probe(ap); |
1459 | } | |
1da177e4 | 1460 | |
2044470c TH |
1461 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1462 | if (classes[i] == ATA_DEV_UNKNOWN) | |
1463 | classes[i] = ATA_DEV_NONE; | |
1464 | ||
28ca5c57 | 1465 | /* read IDENTIFY page and configure devices */ |
1da177e4 | 1466 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
e82cbdb9 | 1467 | dev = &ap->device[i]; |
28ca5c57 | 1468 | |
ec573755 TH |
1469 | if (tries[i]) |
1470 | dev->class = classes[i]; | |
ffeae418 | 1471 | |
14d2bac1 | 1472 | if (!ata_dev_enabled(dev)) |
ffeae418 | 1473 | continue; |
ffeae418 | 1474 | |
3373efd8 | 1475 | rc = ata_dev_read_id(dev, &dev->class, 1, dev->id); |
14d2bac1 TH |
1476 | if (rc) |
1477 | goto fail; | |
1478 | ||
3373efd8 | 1479 | rc = ata_dev_configure(dev, 1); |
14d2bac1 TH |
1480 | if (rc) |
1481 | goto fail; | |
1da177e4 LT |
1482 | } |
1483 | ||
e82cbdb9 | 1484 | /* configure transfer mode */ |
3adcebb2 | 1485 | rc = ata_set_mode(ap, &dev); |
51713d35 TH |
1486 | if (rc) { |
1487 | down_xfermask = 1; | |
1488 | goto fail; | |
e82cbdb9 | 1489 | } |
1da177e4 | 1490 | |
e82cbdb9 TH |
1491 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1492 | if (ata_dev_enabled(&ap->device[i])) | |
1493 | return 0; | |
1da177e4 | 1494 | |
e82cbdb9 TH |
1495 | /* no device present, disable port */ |
1496 | ata_port_disable(ap); | |
1da177e4 | 1497 | ap->ops->port_disable(ap); |
96072e69 | 1498 | return -ENODEV; |
14d2bac1 TH |
1499 | |
1500 | fail: | |
1501 | switch (rc) { | |
1502 | case -EINVAL: | |
1503 | case -ENODEV: | |
1504 | tries[dev->devno] = 0; | |
1505 | break; | |
1506 | case -EIO: | |
3c567b7d | 1507 | sata_down_spd_limit(ap); |
14d2bac1 TH |
1508 | /* fall through */ |
1509 | default: | |
1510 | tries[dev->devno]--; | |
1511 | if (down_xfermask && | |
3373efd8 | 1512 | ata_down_xfermask_limit(dev, tries[dev->devno] == 1)) |
14d2bac1 TH |
1513 | tries[dev->devno] = 0; |
1514 | } | |
1515 | ||
ec573755 | 1516 | if (!tries[dev->devno]) { |
3373efd8 TH |
1517 | ata_down_xfermask_limit(dev, 1); |
1518 | ata_dev_disable(dev); | |
ec573755 TH |
1519 | } |
1520 | ||
14d2bac1 | 1521 | goto retry; |
1da177e4 LT |
1522 | } |
1523 | ||
1524 | /** | |
0cba632b JG |
1525 | * ata_port_probe - Mark port as enabled |
1526 | * @ap: Port for which we indicate enablement | |
1da177e4 | 1527 | * |
0cba632b JG |
1528 | * Modify @ap data structure such that the system |
1529 | * thinks that the entire port is enabled. | |
1530 | * | |
1531 | * LOCKING: host_set lock, or some other form of | |
1532 | * serialization. | |
1da177e4 LT |
1533 | */ |
1534 | ||
1535 | void ata_port_probe(struct ata_port *ap) | |
1536 | { | |
198e0fed | 1537 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
1538 | } |
1539 | ||
3be680b7 TH |
1540 | /** |
1541 | * sata_print_link_status - Print SATA link status | |
1542 | * @ap: SATA port to printk link status about | |
1543 | * | |
1544 | * This function prints link speed and status of a SATA link. | |
1545 | * | |
1546 | * LOCKING: | |
1547 | * None. | |
1548 | */ | |
1549 | static void sata_print_link_status(struct ata_port *ap) | |
1550 | { | |
6d5f9732 | 1551 | u32 sstatus, scontrol, tmp; |
3be680b7 | 1552 | |
81952c54 | 1553 | if (sata_scr_read(ap, SCR_STATUS, &sstatus)) |
3be680b7 | 1554 | return; |
81952c54 | 1555 | sata_scr_read(ap, SCR_CONTROL, &scontrol); |
3be680b7 | 1556 | |
81952c54 | 1557 | if (ata_port_online(ap)) { |
3be680b7 | 1558 | tmp = (sstatus >> 4) & 0xf; |
f15a1daf TH |
1559 | ata_port_printk(ap, KERN_INFO, |
1560 | "SATA link up %s (SStatus %X SControl %X)\n", | |
1561 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 1562 | } else { |
f15a1daf TH |
1563 | ata_port_printk(ap, KERN_INFO, |
1564 | "SATA link down (SStatus %X SControl %X)\n", | |
1565 | sstatus, scontrol); | |
3be680b7 TH |
1566 | } |
1567 | } | |
1568 | ||
1da177e4 | 1569 | /** |
780a87f7 JG |
1570 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
1571 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1572 | * |
780a87f7 JG |
1573 | * This function issues commands to standard SATA Sxxx |
1574 | * PHY registers, to wake up the phy (and device), and | |
1575 | * clear any reset condition. | |
1da177e4 LT |
1576 | * |
1577 | * LOCKING: | |
0cba632b | 1578 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1579 | * |
1580 | */ | |
1581 | void __sata_phy_reset(struct ata_port *ap) | |
1582 | { | |
1583 | u32 sstatus; | |
1584 | unsigned long timeout = jiffies + (HZ * 5); | |
1585 | ||
1586 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
cdcca89e | 1587 | /* issue phy wake/reset */ |
81952c54 | 1588 | sata_scr_write_flush(ap, SCR_CONTROL, 0x301); |
62ba2841 TH |
1589 | /* Couldn't find anything in SATA I/II specs, but |
1590 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
1591 | mdelay(1); | |
1da177e4 | 1592 | } |
81952c54 TH |
1593 | /* phy wake/clear reset */ |
1594 | sata_scr_write_flush(ap, SCR_CONTROL, 0x300); | |
1da177e4 LT |
1595 | |
1596 | /* wait for phy to become ready, if necessary */ | |
1597 | do { | |
1598 | msleep(200); | |
81952c54 | 1599 | sata_scr_read(ap, SCR_STATUS, &sstatus); |
1da177e4 LT |
1600 | if ((sstatus & 0xf) != 1) |
1601 | break; | |
1602 | } while (time_before(jiffies, timeout)); | |
1603 | ||
3be680b7 TH |
1604 | /* print link status */ |
1605 | sata_print_link_status(ap); | |
656563e3 | 1606 | |
3be680b7 | 1607 | /* TODO: phy layer with polling, timeouts, etc. */ |
81952c54 | 1608 | if (!ata_port_offline(ap)) |
1da177e4 | 1609 | ata_port_probe(ap); |
3be680b7 | 1610 | else |
1da177e4 | 1611 | ata_port_disable(ap); |
1da177e4 | 1612 | |
198e0fed | 1613 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
1614 | return; |
1615 | ||
1616 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
1617 | ata_port_disable(ap); | |
1618 | return; | |
1619 | } | |
1620 | ||
1621 | ap->cbl = ATA_CBL_SATA; | |
1622 | } | |
1623 | ||
1624 | /** | |
780a87f7 JG |
1625 | * sata_phy_reset - Reset SATA bus. |
1626 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1627 | * |
780a87f7 JG |
1628 | * This function resets the SATA bus, and then probes |
1629 | * the bus for devices. | |
1da177e4 LT |
1630 | * |
1631 | * LOCKING: | |
0cba632b | 1632 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1633 | * |
1634 | */ | |
1635 | void sata_phy_reset(struct ata_port *ap) | |
1636 | { | |
1637 | __sata_phy_reset(ap); | |
198e0fed | 1638 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
1639 | return; |
1640 | ata_bus_reset(ap); | |
1641 | } | |
1642 | ||
ebdfca6e AC |
1643 | /** |
1644 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
1645 | * @adev: device |
1646 | * | |
1647 | * Obtain the other device on the same cable, or if none is | |
1648 | * present NULL is returned | |
1649 | */ | |
2e9edbf8 | 1650 | |
3373efd8 | 1651 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 1652 | { |
3373efd8 | 1653 | struct ata_port *ap = adev->ap; |
ebdfca6e | 1654 | struct ata_device *pair = &ap->device[1 - adev->devno]; |
e1211e3f | 1655 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
1656 | return NULL; |
1657 | return pair; | |
1658 | } | |
1659 | ||
1da177e4 | 1660 | /** |
780a87f7 JG |
1661 | * ata_port_disable - Disable port. |
1662 | * @ap: Port to be disabled. | |
1da177e4 | 1663 | * |
780a87f7 JG |
1664 | * Modify @ap data structure such that the system |
1665 | * thinks that the entire port is disabled, and should | |
1666 | * never attempt to probe or communicate with devices | |
1667 | * on this port. | |
1668 | * | |
1669 | * LOCKING: host_set lock, or some other form of | |
1670 | * serialization. | |
1da177e4 LT |
1671 | */ |
1672 | ||
1673 | void ata_port_disable(struct ata_port *ap) | |
1674 | { | |
1675 | ap->device[0].class = ATA_DEV_NONE; | |
1676 | ap->device[1].class = ATA_DEV_NONE; | |
198e0fed | 1677 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
1678 | } |
1679 | ||
1c3fae4d | 1680 | /** |
3c567b7d | 1681 | * sata_down_spd_limit - adjust SATA spd limit downward |
1c3fae4d TH |
1682 | * @ap: Port to adjust SATA spd limit for |
1683 | * | |
1684 | * Adjust SATA spd limit of @ap downward. Note that this | |
1685 | * function only adjusts the limit. The change must be applied | |
3c567b7d | 1686 | * using sata_set_spd(). |
1c3fae4d TH |
1687 | * |
1688 | * LOCKING: | |
1689 | * Inherited from caller. | |
1690 | * | |
1691 | * RETURNS: | |
1692 | * 0 on success, negative errno on failure | |
1693 | */ | |
3c567b7d | 1694 | int sata_down_spd_limit(struct ata_port *ap) |
1c3fae4d | 1695 | { |
81952c54 TH |
1696 | u32 sstatus, spd, mask; |
1697 | int rc, highbit; | |
1c3fae4d | 1698 | |
81952c54 TH |
1699 | rc = sata_scr_read(ap, SCR_STATUS, &sstatus); |
1700 | if (rc) | |
1701 | return rc; | |
1c3fae4d TH |
1702 | |
1703 | mask = ap->sata_spd_limit; | |
1704 | if (mask <= 1) | |
1705 | return -EINVAL; | |
1706 | highbit = fls(mask) - 1; | |
1707 | mask &= ~(1 << highbit); | |
1708 | ||
81952c54 | 1709 | spd = (sstatus >> 4) & 0xf; |
1c3fae4d TH |
1710 | if (spd <= 1) |
1711 | return -EINVAL; | |
1712 | spd--; | |
1713 | mask &= (1 << spd) - 1; | |
1714 | if (!mask) | |
1715 | return -EINVAL; | |
1716 | ||
1717 | ap->sata_spd_limit = mask; | |
1718 | ||
f15a1daf TH |
1719 | ata_port_printk(ap, KERN_WARNING, "limiting SATA link speed to %s\n", |
1720 | sata_spd_string(fls(mask))); | |
1c3fae4d TH |
1721 | |
1722 | return 0; | |
1723 | } | |
1724 | ||
3c567b7d | 1725 | static int __sata_set_spd_needed(struct ata_port *ap, u32 *scontrol) |
1c3fae4d TH |
1726 | { |
1727 | u32 spd, limit; | |
1728 | ||
1729 | if (ap->sata_spd_limit == UINT_MAX) | |
1730 | limit = 0; | |
1731 | else | |
1732 | limit = fls(ap->sata_spd_limit); | |
1733 | ||
1734 | spd = (*scontrol >> 4) & 0xf; | |
1735 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); | |
1736 | ||
1737 | return spd != limit; | |
1738 | } | |
1739 | ||
1740 | /** | |
3c567b7d | 1741 | * sata_set_spd_needed - is SATA spd configuration needed |
1c3fae4d TH |
1742 | * @ap: Port in question |
1743 | * | |
1744 | * Test whether the spd limit in SControl matches | |
1745 | * @ap->sata_spd_limit. This function is used to determine | |
1746 | * whether hardreset is necessary to apply SATA spd | |
1747 | * configuration. | |
1748 | * | |
1749 | * LOCKING: | |
1750 | * Inherited from caller. | |
1751 | * | |
1752 | * RETURNS: | |
1753 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
1754 | */ | |
3c567b7d | 1755 | int sata_set_spd_needed(struct ata_port *ap) |
1c3fae4d TH |
1756 | { |
1757 | u32 scontrol; | |
1758 | ||
81952c54 | 1759 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol)) |
1c3fae4d TH |
1760 | return 0; |
1761 | ||
3c567b7d | 1762 | return __sata_set_spd_needed(ap, &scontrol); |
1c3fae4d TH |
1763 | } |
1764 | ||
1765 | /** | |
3c567b7d | 1766 | * sata_set_spd - set SATA spd according to spd limit |
1c3fae4d TH |
1767 | * @ap: Port to set SATA spd for |
1768 | * | |
1769 | * Set SATA spd of @ap according to sata_spd_limit. | |
1770 | * | |
1771 | * LOCKING: | |
1772 | * Inherited from caller. | |
1773 | * | |
1774 | * RETURNS: | |
1775 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 1776 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 1777 | */ |
3c567b7d | 1778 | int sata_set_spd(struct ata_port *ap) |
1c3fae4d TH |
1779 | { |
1780 | u32 scontrol; | |
81952c54 | 1781 | int rc; |
1c3fae4d | 1782 | |
81952c54 TH |
1783 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
1784 | return rc; | |
1c3fae4d | 1785 | |
3c567b7d | 1786 | if (!__sata_set_spd_needed(ap, &scontrol)) |
1c3fae4d TH |
1787 | return 0; |
1788 | ||
81952c54 TH |
1789 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) |
1790 | return rc; | |
1791 | ||
1c3fae4d TH |
1792 | return 1; |
1793 | } | |
1794 | ||
452503f9 AC |
1795 | /* |
1796 | * This mode timing computation functionality is ported over from | |
1797 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
1798 | */ | |
1799 | /* | |
1800 | * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). | |
1801 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except | |
1802 | * for PIO 5, which is a nonstandard extension and UDMA6, which | |
2e9edbf8 | 1803 | * is currently supported only by Maxtor drives. |
452503f9 AC |
1804 | */ |
1805 | ||
1806 | static const struct ata_timing ata_timing[] = { | |
1807 | ||
1808 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
1809 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
1810 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
1811 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
1812 | ||
1813 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
1814 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
1815 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
1816 | ||
1817 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2e9edbf8 | 1818 | |
452503f9 AC |
1819 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
1820 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
1821 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2e9edbf8 | 1822 | |
452503f9 AC |
1823 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
1824 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
1825 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
1826 | ||
1827 | /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */ | |
1828 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
1829 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
1830 | ||
1831 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
1832 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
1833 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
1834 | ||
1835 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
1836 | ||
1837 | { 0xFF } | |
1838 | }; | |
1839 | ||
1840 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
1841 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
1842 | ||
1843 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
1844 | { | |
1845 | q->setup = EZ(t->setup * 1000, T); | |
1846 | q->act8b = EZ(t->act8b * 1000, T); | |
1847 | q->rec8b = EZ(t->rec8b * 1000, T); | |
1848 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
1849 | q->active = EZ(t->active * 1000, T); | |
1850 | q->recover = EZ(t->recover * 1000, T); | |
1851 | q->cycle = EZ(t->cycle * 1000, T); | |
1852 | q->udma = EZ(t->udma * 1000, UT); | |
1853 | } | |
1854 | ||
1855 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
1856 | struct ata_timing *m, unsigned int what) | |
1857 | { | |
1858 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
1859 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
1860 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
1861 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
1862 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
1863 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
1864 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
1865 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
1866 | } | |
1867 | ||
1868 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
1869 | { | |
1870 | const struct ata_timing *t; | |
1871 | ||
1872 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 1873 | if (t->mode == 0xFF) |
452503f9 | 1874 | return NULL; |
2e9edbf8 | 1875 | return t; |
452503f9 AC |
1876 | } |
1877 | ||
1878 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
1879 | struct ata_timing *t, int T, int UT) | |
1880 | { | |
1881 | const struct ata_timing *s; | |
1882 | struct ata_timing p; | |
1883 | ||
1884 | /* | |
2e9edbf8 | 1885 | * Find the mode. |
75b1f2f8 | 1886 | */ |
452503f9 AC |
1887 | |
1888 | if (!(s = ata_timing_find_mode(speed))) | |
1889 | return -EINVAL; | |
1890 | ||
75b1f2f8 AL |
1891 | memcpy(t, s, sizeof(*s)); |
1892 | ||
452503f9 AC |
1893 | /* |
1894 | * If the drive is an EIDE drive, it can tell us it needs extended | |
1895 | * PIO/MW_DMA cycle timing. | |
1896 | */ | |
1897 | ||
1898 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
1899 | memset(&p, 0, sizeof(p)); | |
1900 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
1901 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
1902 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
1903 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
1904 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
1905 | } | |
1906 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
1907 | } | |
1908 | ||
1909 | /* | |
1910 | * Convert the timing to bus clock counts. | |
1911 | */ | |
1912 | ||
75b1f2f8 | 1913 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
1914 | |
1915 | /* | |
c893a3ae RD |
1916 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
1917 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
1918 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
1919 | */ |
1920 | ||
1921 | if (speed > XFER_PIO_4) { | |
1922 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); | |
1923 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
1924 | } | |
1925 | ||
1926 | /* | |
c893a3ae | 1927 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
1928 | */ |
1929 | ||
1930 | if (t->act8b + t->rec8b < t->cyc8b) { | |
1931 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
1932 | t->rec8b = t->cyc8b - t->act8b; | |
1933 | } | |
1934 | ||
1935 | if (t->active + t->recover < t->cycle) { | |
1936 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
1937 | t->recover = t->cycle - t->active; | |
1938 | } | |
1939 | ||
1940 | return 0; | |
1941 | } | |
1942 | ||
cf176e1a TH |
1943 | /** |
1944 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a TH |
1945 | * @dev: Device to adjust xfer masks |
1946 | * @force_pio0: Force PIO0 | |
1947 | * | |
1948 | * Adjust xfer masks of @dev downward. Note that this function | |
1949 | * does not apply the change. Invoking ata_set_mode() afterwards | |
1950 | * will apply the limit. | |
1951 | * | |
1952 | * LOCKING: | |
1953 | * Inherited from caller. | |
1954 | * | |
1955 | * RETURNS: | |
1956 | * 0 on success, negative errno on failure | |
1957 | */ | |
3373efd8 | 1958 | int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0) |
cf176e1a TH |
1959 | { |
1960 | unsigned long xfer_mask; | |
1961 | int highbit; | |
1962 | ||
1963 | xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask, | |
1964 | dev->udma_mask); | |
1965 | ||
1966 | if (!xfer_mask) | |
1967 | goto fail; | |
1968 | /* don't gear down to MWDMA from UDMA, go directly to PIO */ | |
1969 | if (xfer_mask & ATA_MASK_UDMA) | |
1970 | xfer_mask &= ~ATA_MASK_MWDMA; | |
1971 | ||
1972 | highbit = fls(xfer_mask) - 1; | |
1973 | xfer_mask &= ~(1 << highbit); | |
1974 | if (force_pio0) | |
1975 | xfer_mask &= 1 << ATA_SHIFT_PIO; | |
1976 | if (!xfer_mask) | |
1977 | goto fail; | |
1978 | ||
1979 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
1980 | &dev->udma_mask); | |
1981 | ||
f15a1daf TH |
1982 | ata_dev_printk(dev, KERN_WARNING, "limiting speed to %s\n", |
1983 | ata_mode_string(xfer_mask)); | |
cf176e1a TH |
1984 | |
1985 | return 0; | |
1986 | ||
1987 | fail: | |
1988 | return -EINVAL; | |
1989 | } | |
1990 | ||
3373efd8 | 1991 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 1992 | { |
83206a29 TH |
1993 | unsigned int err_mask; |
1994 | int rc; | |
1da177e4 | 1995 | |
e8384607 | 1996 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
1997 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
1998 | dev->flags |= ATA_DFLAG_PIO; | |
1999 | ||
3373efd8 | 2000 | err_mask = ata_dev_set_xfermode(dev); |
83206a29 | 2001 | if (err_mask) { |
f15a1daf TH |
2002 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
2003 | "(err_mask=0x%x)\n", err_mask); | |
83206a29 TH |
2004 | return -EIO; |
2005 | } | |
1da177e4 | 2006 | |
3373efd8 | 2007 | rc = ata_dev_revalidate(dev, 0); |
5eb45c02 | 2008 | if (rc) |
83206a29 | 2009 | return rc; |
48a8a14f | 2010 | |
23e71c3d TH |
2011 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
2012 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 2013 | |
f15a1daf TH |
2014 | ata_dev_printk(dev, KERN_INFO, "configured for %s\n", |
2015 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
83206a29 | 2016 | return 0; |
1da177e4 LT |
2017 | } |
2018 | ||
1da177e4 LT |
2019 | /** |
2020 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
2021 | * @ap: port on which timings will be programmed | |
e82cbdb9 | 2022 | * @r_failed_dev: out paramter for failed device |
1da177e4 | 2023 | * |
e82cbdb9 TH |
2024 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
2025 | * ata_set_mode() fails, pointer to the failing device is | |
2026 | * returned in @r_failed_dev. | |
780a87f7 | 2027 | * |
1da177e4 | 2028 | * LOCKING: |
0cba632b | 2029 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
2030 | * |
2031 | * RETURNS: | |
2032 | * 0 on success, negative errno otherwise | |
1da177e4 | 2033 | */ |
1ad8e7f9 | 2034 | int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) |
1da177e4 | 2035 | { |
e8e0619f | 2036 | struct ata_device *dev; |
e82cbdb9 | 2037 | int i, rc = 0, used_dma = 0, found = 0; |
1da177e4 | 2038 | |
3adcebb2 TH |
2039 | /* has private set_mode? */ |
2040 | if (ap->ops->set_mode) { | |
2041 | /* FIXME: make ->set_mode handle no device case and | |
2042 | * return error code and failing device on failure. | |
2043 | */ | |
2044 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
2045 | if (ata_dev_enabled(&ap->device[i])) { | |
2046 | ap->ops->set_mode(ap); | |
2047 | break; | |
2048 | } | |
2049 | } | |
2050 | return 0; | |
2051 | } | |
2052 | ||
a6d5a51c TH |
2053 | /* step 1: calculate xfer_mask */ |
2054 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
acf356b1 | 2055 | unsigned int pio_mask, dma_mask; |
a6d5a51c | 2056 | |
e8e0619f TH |
2057 | dev = &ap->device[i]; |
2058 | ||
e1211e3f | 2059 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
2060 | continue; |
2061 | ||
3373efd8 | 2062 | ata_dev_xfermask(dev); |
1da177e4 | 2063 | |
acf356b1 TH |
2064 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
2065 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
2066 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); | |
2067 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 2068 | |
4f65977d | 2069 | found = 1; |
5444a6f4 AC |
2070 | if (dev->dma_mode) |
2071 | used_dma = 1; | |
a6d5a51c | 2072 | } |
4f65977d | 2073 | if (!found) |
e82cbdb9 | 2074 | goto out; |
a6d5a51c TH |
2075 | |
2076 | /* step 2: always set host PIO timings */ | |
e8e0619f TH |
2077 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2078 | dev = &ap->device[i]; | |
2079 | if (!ata_dev_enabled(dev)) | |
2080 | continue; | |
2081 | ||
2082 | if (!dev->pio_mode) { | |
f15a1daf | 2083 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 2084 | rc = -EINVAL; |
e82cbdb9 | 2085 | goto out; |
e8e0619f TH |
2086 | } |
2087 | ||
2088 | dev->xfer_mode = dev->pio_mode; | |
2089 | dev->xfer_shift = ATA_SHIFT_PIO; | |
2090 | if (ap->ops->set_piomode) | |
2091 | ap->ops->set_piomode(ap, dev); | |
2092 | } | |
1da177e4 | 2093 | |
a6d5a51c | 2094 | /* step 3: set host DMA timings */ |
e8e0619f TH |
2095 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2096 | dev = &ap->device[i]; | |
2097 | ||
2098 | if (!ata_dev_enabled(dev) || !dev->dma_mode) | |
2099 | continue; | |
2100 | ||
2101 | dev->xfer_mode = dev->dma_mode; | |
2102 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
2103 | if (ap->ops->set_dmamode) | |
2104 | ap->ops->set_dmamode(ap, dev); | |
2105 | } | |
1da177e4 LT |
2106 | |
2107 | /* step 4: update devices' xfer mode */ | |
83206a29 | 2108 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
e8e0619f | 2109 | dev = &ap->device[i]; |
1da177e4 | 2110 | |
e1211e3f | 2111 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
2112 | continue; |
2113 | ||
3373efd8 | 2114 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 2115 | if (rc) |
e82cbdb9 | 2116 | goto out; |
83206a29 | 2117 | } |
1da177e4 | 2118 | |
e8e0619f TH |
2119 | /* Record simplex status. If we selected DMA then the other |
2120 | * host channels are not permitted to do so. | |
5444a6f4 | 2121 | */ |
5444a6f4 AC |
2122 | if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX)) |
2123 | ap->host_set->simplex_claimed = 1; | |
2124 | ||
e8e0619f | 2125 | /* step5: chip specific finalisation */ |
1da177e4 LT |
2126 | if (ap->ops->post_set_mode) |
2127 | ap->ops->post_set_mode(ap); | |
2128 | ||
e82cbdb9 TH |
2129 | out: |
2130 | if (rc) | |
2131 | *r_failed_dev = dev; | |
2132 | return rc; | |
1da177e4 LT |
2133 | } |
2134 | ||
1fdffbce JG |
2135 | /** |
2136 | * ata_tf_to_host - issue ATA taskfile to host controller | |
2137 | * @ap: port to which command is being issued | |
2138 | * @tf: ATA taskfile register set | |
2139 | * | |
2140 | * Issues ATA taskfile register set to ATA host controller, | |
2141 | * with proper synchronization with interrupt handler and | |
2142 | * other threads. | |
2143 | * | |
2144 | * LOCKING: | |
2145 | * spin_lock_irqsave(host_set lock) | |
2146 | */ | |
2147 | ||
2148 | static inline void ata_tf_to_host(struct ata_port *ap, | |
2149 | const struct ata_taskfile *tf) | |
2150 | { | |
2151 | ap->ops->tf_load(ap, tf); | |
2152 | ap->ops->exec_command(ap, tf); | |
2153 | } | |
2154 | ||
1da177e4 LT |
2155 | /** |
2156 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
2157 | * @ap: port containing status register to be polled | |
2158 | * @tmout_pat: impatience timeout | |
2159 | * @tmout: overall timeout | |
2160 | * | |
780a87f7 JG |
2161 | * Sleep until ATA Status register bit BSY clears, |
2162 | * or a timeout occurs. | |
2163 | * | |
2164 | * LOCKING: None. | |
1da177e4 LT |
2165 | */ |
2166 | ||
6f8b9958 TH |
2167 | unsigned int ata_busy_sleep (struct ata_port *ap, |
2168 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
2169 | { |
2170 | unsigned long timer_start, timeout; | |
2171 | u8 status; | |
2172 | ||
2173 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
2174 | timer_start = jiffies; | |
2175 | timeout = timer_start + tmout_pat; | |
2176 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
2177 | msleep(50); | |
2178 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
2179 | } | |
2180 | ||
2181 | if (status & ATA_BUSY) | |
f15a1daf TH |
2182 | ata_port_printk(ap, KERN_WARNING, |
2183 | "port is slow to respond, please be patient\n"); | |
1da177e4 LT |
2184 | |
2185 | timeout = timer_start + tmout; | |
2186 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
2187 | msleep(50); | |
2188 | status = ata_chk_status(ap); | |
2189 | } | |
2190 | ||
2191 | if (status & ATA_BUSY) { | |
f15a1daf TH |
2192 | ata_port_printk(ap, KERN_ERR, "port failed to respond " |
2193 | "(%lu secs)\n", tmout / HZ); | |
1da177e4 LT |
2194 | return 1; |
2195 | } | |
2196 | ||
2197 | return 0; | |
2198 | } | |
2199 | ||
2200 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) | |
2201 | { | |
2202 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2203 | unsigned int dev0 = devmask & (1 << 0); | |
2204 | unsigned int dev1 = devmask & (1 << 1); | |
2205 | unsigned long timeout; | |
2206 | ||
2207 | /* if device 0 was found in ata_devchk, wait for its | |
2208 | * BSY bit to clear | |
2209 | */ | |
2210 | if (dev0) | |
2211 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2212 | ||
2213 | /* if device 1 was found in ata_devchk, wait for | |
2214 | * register access, then wait for BSY to clear | |
2215 | */ | |
2216 | timeout = jiffies + ATA_TMOUT_BOOT; | |
2217 | while (dev1) { | |
2218 | u8 nsect, lbal; | |
2219 | ||
2220 | ap->ops->dev_select(ap, 1); | |
2221 | if (ap->flags & ATA_FLAG_MMIO) { | |
2222 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
2223 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
2224 | } else { | |
2225 | nsect = inb(ioaddr->nsect_addr); | |
2226 | lbal = inb(ioaddr->lbal_addr); | |
2227 | } | |
2228 | if ((nsect == 1) && (lbal == 1)) | |
2229 | break; | |
2230 | if (time_after(jiffies, timeout)) { | |
2231 | dev1 = 0; | |
2232 | break; | |
2233 | } | |
2234 | msleep(50); /* give drive a breather */ | |
2235 | } | |
2236 | if (dev1) | |
2237 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2238 | ||
2239 | /* is all this really necessary? */ | |
2240 | ap->ops->dev_select(ap, 0); | |
2241 | if (dev1) | |
2242 | ap->ops->dev_select(ap, 1); | |
2243 | if (dev0) | |
2244 | ap->ops->dev_select(ap, 0); | |
2245 | } | |
2246 | ||
1da177e4 LT |
2247 | static unsigned int ata_bus_softreset(struct ata_port *ap, |
2248 | unsigned int devmask) | |
2249 | { | |
2250 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2251 | ||
2252 | DPRINTK("ata%u: bus reset via SRST\n", ap->id); | |
2253 | ||
2254 | /* software reset. causes dev0 to be selected */ | |
2255 | if (ap->flags & ATA_FLAG_MMIO) { | |
2256 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2257 | udelay(20); /* FIXME: flush */ | |
2258 | writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr); | |
2259 | udelay(20); /* FIXME: flush */ | |
2260 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2261 | } else { | |
2262 | outb(ap->ctl, ioaddr->ctl_addr); | |
2263 | udelay(10); | |
2264 | outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
2265 | udelay(10); | |
2266 | outb(ap->ctl, ioaddr->ctl_addr); | |
2267 | } | |
2268 | ||
2269 | /* spec mandates ">= 2ms" before checking status. | |
2270 | * We wait 150ms, because that was the magic delay used for | |
2271 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
2272 | * between when the ATA command register is written, and then | |
2273 | * status is checked. Because waiting for "a while" before | |
2274 | * checking status is fine, post SRST, we perform this magic | |
2275 | * delay here as well. | |
09c7ad79 AC |
2276 | * |
2277 | * Old drivers/ide uses the 2mS rule and then waits for ready | |
1da177e4 LT |
2278 | */ |
2279 | msleep(150); | |
2280 | ||
2e9edbf8 | 2281 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
2282 | * the bus shows 0xFF because the odd clown forgets the D7 |
2283 | * pulldown resistor. | |
2284 | */ | |
987d2f05 | 2285 | if (ata_check_status(ap) == 0xFF) { |
f15a1daf | 2286 | ata_port_printk(ap, KERN_ERR, "SRST failed (status 0xFF)\n"); |
298a41ca | 2287 | return AC_ERR_OTHER; |
987d2f05 | 2288 | } |
09c7ad79 | 2289 | |
1da177e4 LT |
2290 | ata_bus_post_reset(ap, devmask); |
2291 | ||
2292 | return 0; | |
2293 | } | |
2294 | ||
2295 | /** | |
2296 | * ata_bus_reset - reset host port and associated ATA channel | |
2297 | * @ap: port to reset | |
2298 | * | |
2299 | * This is typically the first time we actually start issuing | |
2300 | * commands to the ATA channel. We wait for BSY to clear, then | |
2301 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
2302 | * result. Determine what devices, if any, are on the channel | |
2303 | * by looking at the device 0/1 error register. Look at the signature | |
2304 | * stored in each device's taskfile registers, to determine if | |
2305 | * the device is ATA or ATAPI. | |
2306 | * | |
2307 | * LOCKING: | |
0cba632b JG |
2308 | * PCI/etc. bus probe sem. |
2309 | * Obtains host_set lock. | |
1da177e4 LT |
2310 | * |
2311 | * SIDE EFFECTS: | |
198e0fed | 2312 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
1da177e4 LT |
2313 | */ |
2314 | ||
2315 | void ata_bus_reset(struct ata_port *ap) | |
2316 | { | |
2317 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2318 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2319 | u8 err; | |
aec5c3c1 | 2320 | unsigned int dev0, dev1 = 0, devmask = 0; |
1da177e4 LT |
2321 | |
2322 | DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); | |
2323 | ||
2324 | /* determine if device 0/1 are present */ | |
2325 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
2326 | dev0 = 1; | |
2327 | else { | |
2328 | dev0 = ata_devchk(ap, 0); | |
2329 | if (slave_possible) | |
2330 | dev1 = ata_devchk(ap, 1); | |
2331 | } | |
2332 | ||
2333 | if (dev0) | |
2334 | devmask |= (1 << 0); | |
2335 | if (dev1) | |
2336 | devmask |= (1 << 1); | |
2337 | ||
2338 | /* select device 0 again */ | |
2339 | ap->ops->dev_select(ap, 0); | |
2340 | ||
2341 | /* issue bus reset */ | |
2342 | if (ap->flags & ATA_FLAG_SRST) | |
aec5c3c1 TH |
2343 | if (ata_bus_softreset(ap, devmask)) |
2344 | goto err_out; | |
1da177e4 LT |
2345 | |
2346 | /* | |
2347 | * determine by signature whether we have ATA or ATAPI devices | |
2348 | */ | |
b4dc7623 | 2349 | ap->device[0].class = ata_dev_try_classify(ap, 0, &err); |
1da177e4 | 2350 | if ((slave_possible) && (err != 0x81)) |
b4dc7623 | 2351 | ap->device[1].class = ata_dev_try_classify(ap, 1, &err); |
1da177e4 LT |
2352 | |
2353 | /* re-enable interrupts */ | |
2354 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ | |
2355 | ata_irq_on(ap); | |
2356 | ||
2357 | /* is double-select really necessary? */ | |
2358 | if (ap->device[1].class != ATA_DEV_NONE) | |
2359 | ap->ops->dev_select(ap, 1); | |
2360 | if (ap->device[0].class != ATA_DEV_NONE) | |
2361 | ap->ops->dev_select(ap, 0); | |
2362 | ||
2363 | /* if no devices were detected, disable this port */ | |
2364 | if ((ap->device[0].class == ATA_DEV_NONE) && | |
2365 | (ap->device[1].class == ATA_DEV_NONE)) | |
2366 | goto err_out; | |
2367 | ||
2368 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
2369 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
2370 | if (ap->flags & ATA_FLAG_MMIO) | |
2371 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2372 | else | |
2373 | outb(ap->ctl, ioaddr->ctl_addr); | |
2374 | } | |
2375 | ||
2376 | DPRINTK("EXIT\n"); | |
2377 | return; | |
2378 | ||
2379 | err_out: | |
f15a1daf | 2380 | ata_port_printk(ap, KERN_ERR, "disabling port\n"); |
1da177e4 LT |
2381 | ap->ops->port_disable(ap); |
2382 | ||
2383 | DPRINTK("EXIT\n"); | |
2384 | } | |
2385 | ||
7a7921e8 TH |
2386 | static int sata_phy_resume(struct ata_port *ap) |
2387 | { | |
2388 | unsigned long timeout = jiffies + (HZ * 5); | |
852ee16a | 2389 | u32 scontrol, sstatus; |
81952c54 TH |
2390 | int rc; |
2391 | ||
2392 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) | |
2393 | return rc; | |
7a7921e8 | 2394 | |
852ee16a | 2395 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 TH |
2396 | |
2397 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) | |
2398 | return rc; | |
7a7921e8 TH |
2399 | |
2400 | /* Wait for phy to become ready, if necessary. */ | |
2401 | do { | |
2402 | msleep(200); | |
81952c54 TH |
2403 | if ((rc = sata_scr_read(ap, SCR_STATUS, &sstatus))) |
2404 | return rc; | |
7a7921e8 TH |
2405 | if ((sstatus & 0xf) != 1) |
2406 | return 0; | |
2407 | } while (time_before(jiffies, timeout)); | |
2408 | ||
81952c54 | 2409 | return -EBUSY; |
7a7921e8 TH |
2410 | } |
2411 | ||
8a19ac89 TH |
2412 | /** |
2413 | * ata_std_probeinit - initialize probing | |
2414 | * @ap: port to be probed | |
2415 | * | |
2416 | * @ap is about to be probed. Initialize it. This function is | |
2417 | * to be used as standard callback for ata_drive_probe_reset(). | |
3a39746a TH |
2418 | * |
2419 | * NOTE!!! Do not use this function as probeinit if a low level | |
2420 | * driver implements only hardreset. Just pass NULL as probeinit | |
2421 | * in that case. Using this function is probably okay but doing | |
2422 | * so makes reset sequence different from the original | |
2423 | * ->phy_reset implementation and Jeff nervous. :-P | |
8a19ac89 | 2424 | */ |
17efc5f7 | 2425 | void ata_std_probeinit(struct ata_port *ap) |
8a19ac89 | 2426 | { |
81952c54 | 2427 | u32 scontrol; |
1c3fae4d | 2428 | |
81952c54 TH |
2429 | /* resume link */ |
2430 | sata_phy_resume(ap); | |
1c3fae4d | 2431 | |
81952c54 TH |
2432 | /* init sata_spd_limit to the current value */ |
2433 | if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) { | |
2434 | int spd = (scontrol >> 4) & 0xf; | |
2435 | ap->sata_spd_limit &= (1 << spd) - 1; | |
3a39746a | 2436 | } |
81952c54 TH |
2437 | |
2438 | /* wait for device */ | |
2439 | if (ata_port_online(ap)) | |
2440 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
8a19ac89 TH |
2441 | } |
2442 | ||
c2bd5804 TH |
2443 | /** |
2444 | * ata_std_softreset - reset host port via ATA SRST | |
2445 | * @ap: port to reset | |
c2bd5804 TH |
2446 | * @classes: resulting classes of attached devices |
2447 | * | |
2448 | * Reset host port using ATA SRST. This function is to be used | |
2449 | * as standard callback for ata_drive_*_reset() functions. | |
2450 | * | |
2451 | * LOCKING: | |
2452 | * Kernel thread context (may sleep) | |
2453 | * | |
2454 | * RETURNS: | |
2455 | * 0 on success, -errno otherwise. | |
2456 | */ | |
2bf2cb26 | 2457 | int ata_std_softreset(struct ata_port *ap, unsigned int *classes) |
c2bd5804 TH |
2458 | { |
2459 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2460 | unsigned int devmask = 0, err_mask; | |
2461 | u8 err; | |
2462 | ||
2463 | DPRINTK("ENTER\n"); | |
2464 | ||
81952c54 | 2465 | if (ata_port_offline(ap)) { |
3a39746a TH |
2466 | classes[0] = ATA_DEV_NONE; |
2467 | goto out; | |
2468 | } | |
2469 | ||
c2bd5804 TH |
2470 | /* determine if device 0/1 are present */ |
2471 | if (ata_devchk(ap, 0)) | |
2472 | devmask |= (1 << 0); | |
2473 | if (slave_possible && ata_devchk(ap, 1)) | |
2474 | devmask |= (1 << 1); | |
2475 | ||
c2bd5804 TH |
2476 | /* select device 0 again */ |
2477 | ap->ops->dev_select(ap, 0); | |
2478 | ||
2479 | /* issue bus reset */ | |
2480 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
2481 | err_mask = ata_bus_softreset(ap, devmask); | |
2482 | if (err_mask) { | |
f15a1daf TH |
2483 | ata_port_printk(ap, KERN_ERR, "SRST failed (err_mask=0x%x)\n", |
2484 | err_mask); | |
c2bd5804 TH |
2485 | return -EIO; |
2486 | } | |
2487 | ||
2488 | /* determine by signature whether we have ATA or ATAPI devices */ | |
2489 | classes[0] = ata_dev_try_classify(ap, 0, &err); | |
2490 | if (slave_possible && err != 0x81) | |
2491 | classes[1] = ata_dev_try_classify(ap, 1, &err); | |
2492 | ||
3a39746a | 2493 | out: |
c2bd5804 TH |
2494 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
2495 | return 0; | |
2496 | } | |
2497 | ||
2498 | /** | |
2499 | * sata_std_hardreset - reset host port via SATA phy reset | |
2500 | * @ap: port to reset | |
c2bd5804 TH |
2501 | * @class: resulting class of attached device |
2502 | * | |
2503 | * SATA phy-reset host port using DET bits of SControl register. | |
2504 | * This function is to be used as standard callback for | |
2505 | * ata_drive_*_reset(). | |
2506 | * | |
2507 | * LOCKING: | |
2508 | * Kernel thread context (may sleep) | |
2509 | * | |
2510 | * RETURNS: | |
2511 | * 0 on success, -errno otherwise. | |
2512 | */ | |
2bf2cb26 | 2513 | int sata_std_hardreset(struct ata_port *ap, unsigned int *class) |
c2bd5804 | 2514 | { |
852ee16a | 2515 | u32 scontrol; |
81952c54 | 2516 | int rc; |
852ee16a | 2517 | |
c2bd5804 TH |
2518 | DPRINTK("ENTER\n"); |
2519 | ||
3c567b7d | 2520 | if (sata_set_spd_needed(ap)) { |
1c3fae4d TH |
2521 | /* SATA spec says nothing about how to reconfigure |
2522 | * spd. To be on the safe side, turn off phy during | |
2523 | * reconfiguration. This works for at least ICH7 AHCI | |
2524 | * and Sil3124. | |
2525 | */ | |
81952c54 TH |
2526 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
2527 | return rc; | |
2528 | ||
1c3fae4d | 2529 | scontrol = (scontrol & 0x0f0) | 0x302; |
81952c54 TH |
2530 | |
2531 | if ((rc = sata_scr_write(ap, SCR_CONTROL, scontrol))) | |
2532 | return rc; | |
1c3fae4d | 2533 | |
3c567b7d | 2534 | sata_set_spd(ap); |
1c3fae4d TH |
2535 | } |
2536 | ||
2537 | /* issue phy wake/reset */ | |
81952c54 TH |
2538 | if ((rc = sata_scr_read(ap, SCR_CONTROL, &scontrol))) |
2539 | return rc; | |
2540 | ||
852ee16a | 2541 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 TH |
2542 | |
2543 | if ((rc = sata_scr_write_flush(ap, SCR_CONTROL, scontrol))) | |
2544 | return rc; | |
c2bd5804 | 2545 | |
1c3fae4d | 2546 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
2547 | * 10.4.2 says at least 1 ms. |
2548 | */ | |
2549 | msleep(1); | |
2550 | ||
1c3fae4d | 2551 | /* bring phy back */ |
7a7921e8 | 2552 | sata_phy_resume(ap); |
c2bd5804 | 2553 | |
c2bd5804 | 2554 | /* TODO: phy layer with polling, timeouts, etc. */ |
81952c54 | 2555 | if (ata_port_offline(ap)) { |
c2bd5804 TH |
2556 | *class = ATA_DEV_NONE; |
2557 | DPRINTK("EXIT, link offline\n"); | |
2558 | return 0; | |
2559 | } | |
2560 | ||
2561 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
f15a1daf TH |
2562 | ata_port_printk(ap, KERN_ERR, |
2563 | "COMRESET failed (device not ready)\n"); | |
c2bd5804 TH |
2564 | return -EIO; |
2565 | } | |
2566 | ||
3a39746a TH |
2567 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
2568 | ||
c2bd5804 TH |
2569 | *class = ata_dev_try_classify(ap, 0, NULL); |
2570 | ||
2571 | DPRINTK("EXIT, class=%u\n", *class); | |
2572 | return 0; | |
2573 | } | |
2574 | ||
2575 | /** | |
2576 | * ata_std_postreset - standard postreset callback | |
2577 | * @ap: the target ata_port | |
2578 | * @classes: classes of attached devices | |
2579 | * | |
2580 | * This function is invoked after a successful reset. Note that | |
2581 | * the device might have been reset more than once using | |
2582 | * different reset methods before postreset is invoked. | |
c2bd5804 TH |
2583 | * |
2584 | * This function is to be used as standard callback for | |
2585 | * ata_drive_*_reset(). | |
2586 | * | |
2587 | * LOCKING: | |
2588 | * Kernel thread context (may sleep) | |
2589 | */ | |
2590 | void ata_std_postreset(struct ata_port *ap, unsigned int *classes) | |
2591 | { | |
dc2b3515 TH |
2592 | u32 serror; |
2593 | ||
c2bd5804 TH |
2594 | DPRINTK("ENTER\n"); |
2595 | ||
c2bd5804 | 2596 | /* print link status */ |
81952c54 | 2597 | sata_print_link_status(ap); |
c2bd5804 | 2598 | |
dc2b3515 TH |
2599 | /* clear SError */ |
2600 | if (sata_scr_read(ap, SCR_ERROR, &serror) == 0) | |
2601 | sata_scr_write(ap, SCR_ERROR, serror); | |
2602 | ||
3a39746a | 2603 | /* re-enable interrupts */ |
e3180499 TH |
2604 | if (!ap->ops->error_handler) { |
2605 | /* FIXME: hack. create a hook instead */ | |
2606 | if (ap->ioaddr.ctl_addr) | |
2607 | ata_irq_on(ap); | |
2608 | } | |
c2bd5804 TH |
2609 | |
2610 | /* is double-select really necessary? */ | |
2611 | if (classes[0] != ATA_DEV_NONE) | |
2612 | ap->ops->dev_select(ap, 1); | |
2613 | if (classes[1] != ATA_DEV_NONE) | |
2614 | ap->ops->dev_select(ap, 0); | |
2615 | ||
3a39746a TH |
2616 | /* bail out if no device is present */ |
2617 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
2618 | DPRINTK("EXIT, no device\n"); | |
2619 | return; | |
2620 | } | |
2621 | ||
2622 | /* set up device control */ | |
2623 | if (ap->ioaddr.ctl_addr) { | |
2624 | if (ap->flags & ATA_FLAG_MMIO) | |
2625 | writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr); | |
2626 | else | |
2627 | outb(ap->ctl, ap->ioaddr.ctl_addr); | |
2628 | } | |
c2bd5804 TH |
2629 | |
2630 | DPRINTK("EXIT\n"); | |
2631 | } | |
2632 | ||
2633 | /** | |
2634 | * ata_std_probe_reset - standard probe reset method | |
2635 | * @ap: prot to perform probe-reset | |
2636 | * @classes: resulting classes of attached devices | |
2637 | * | |
2638 | * The stock off-the-shelf ->probe_reset method. | |
2639 | * | |
2640 | * LOCKING: | |
2641 | * Kernel thread context (may sleep) | |
2642 | * | |
2643 | * RETURNS: | |
2644 | * 0 on success, -errno otherwise. | |
2645 | */ | |
2646 | int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes) | |
2647 | { | |
2648 | ata_reset_fn_t hardreset; | |
2649 | ||
2650 | hardreset = NULL; | |
81952c54 | 2651 | if (sata_scr_valid(ap)) |
c2bd5804 TH |
2652 | hardreset = sata_std_hardreset; |
2653 | ||
8a19ac89 | 2654 | return ata_drive_probe_reset(ap, ata_std_probeinit, |
7944ea95 | 2655 | ata_std_softreset, hardreset, |
c2bd5804 TH |
2656 | ata_std_postreset, classes); |
2657 | } | |
2658 | ||
2bf2cb26 | 2659 | int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset, |
96bd39ec | 2660 | unsigned int *classes) |
a62c0fc5 TH |
2661 | { |
2662 | int i, rc; | |
2663 | ||
2664 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2665 | classes[i] = ATA_DEV_UNKNOWN; | |
2666 | ||
2bf2cb26 | 2667 | rc = reset(ap, classes); |
a62c0fc5 TH |
2668 | if (rc) |
2669 | return rc; | |
2670 | ||
2671 | /* If any class isn't ATA_DEV_UNKNOWN, consider classification | |
2672 | * is complete and convert all ATA_DEV_UNKNOWN to | |
2673 | * ATA_DEV_NONE. | |
2674 | */ | |
2675 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2676 | if (classes[i] != ATA_DEV_UNKNOWN) | |
2677 | break; | |
2678 | ||
2679 | if (i < ATA_MAX_DEVICES) | |
2680 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2681 | if (classes[i] == ATA_DEV_UNKNOWN) | |
2682 | classes[i] = ATA_DEV_NONE; | |
2683 | ||
9974e7cc | 2684 | return 0; |
a62c0fc5 TH |
2685 | } |
2686 | ||
2687 | /** | |
2688 | * ata_drive_probe_reset - Perform probe reset with given methods | |
2689 | * @ap: port to reset | |
7944ea95 | 2690 | * @probeinit: probeinit method (can be NULL) |
a62c0fc5 TH |
2691 | * @softreset: softreset method (can be NULL) |
2692 | * @hardreset: hardreset method (can be NULL) | |
2693 | * @postreset: postreset method (can be NULL) | |
2694 | * @classes: resulting classes of attached devices | |
2695 | * | |
2696 | * Reset the specified port and classify attached devices using | |
2697 | * given methods. This function prefers softreset but tries all | |
2698 | * possible reset sequences to reset and classify devices. This | |
2699 | * function is intended to be used for constructing ->probe_reset | |
2700 | * callback by low level drivers. | |
2701 | * | |
2702 | * Reset methods should follow the following rules. | |
2703 | * | |
2704 | * - Return 0 on sucess, -errno on failure. | |
2705 | * - If classification is supported, fill classes[] with | |
2706 | * recognized class codes. | |
2707 | * - If classification is not supported, leave classes[] alone. | |
a62c0fc5 TH |
2708 | * |
2709 | * LOCKING: | |
2710 | * Kernel thread context (may sleep) | |
2711 | * | |
2712 | * RETURNS: | |
2713 | * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV | |
2714 | * if classification fails, and any error code from reset | |
2715 | * methods. | |
2716 | */ | |
7944ea95 | 2717 | int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit, |
a62c0fc5 TH |
2718 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
2719 | ata_postreset_fn_t postreset, unsigned int *classes) | |
2720 | { | |
2721 | int rc = -EINVAL; | |
2722 | ||
e3180499 TH |
2723 | ata_eh_freeze_port(ap); |
2724 | ||
7944ea95 TH |
2725 | if (probeinit) |
2726 | probeinit(ap); | |
2727 | ||
3c567b7d | 2728 | if (softreset && !sata_set_spd_needed(ap)) { |
96bd39ec | 2729 | rc = ata_do_reset(ap, softreset, classes); |
9974e7cc TH |
2730 | if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN) |
2731 | goto done; | |
f15a1daf TH |
2732 | ata_port_printk(ap, KERN_INFO, "softreset failed, " |
2733 | "will try hardreset in 5 secs\n"); | |
edbabd86 | 2734 | ssleep(5); |
a62c0fc5 TH |
2735 | } |
2736 | ||
2737 | if (!hardreset) | |
9974e7cc | 2738 | goto done; |
a62c0fc5 | 2739 | |
90dac02c | 2740 | while (1) { |
96bd39ec | 2741 | rc = ata_do_reset(ap, hardreset, classes); |
90dac02c TH |
2742 | if (rc == 0) { |
2743 | if (classes[0] != ATA_DEV_UNKNOWN) | |
2744 | goto done; | |
2745 | break; | |
2746 | } | |
2747 | ||
3c567b7d | 2748 | if (sata_down_spd_limit(ap)) |
90dac02c | 2749 | goto done; |
edbabd86 | 2750 | |
f15a1daf TH |
2751 | ata_port_printk(ap, KERN_INFO, "hardreset failed, " |
2752 | "will retry in 5 secs\n"); | |
edbabd86 | 2753 | ssleep(5); |
90dac02c | 2754 | } |
a62c0fc5 | 2755 | |
edbabd86 | 2756 | if (softreset) { |
f15a1daf TH |
2757 | ata_port_printk(ap, KERN_INFO, |
2758 | "hardreset succeeded without classification, " | |
2759 | "will retry softreset in 5 secs\n"); | |
edbabd86 TH |
2760 | ssleep(5); |
2761 | ||
96bd39ec | 2762 | rc = ata_do_reset(ap, softreset, classes); |
edbabd86 | 2763 | } |
a62c0fc5 | 2764 | |
9974e7cc | 2765 | done: |
96bd39ec TH |
2766 | if (rc == 0) { |
2767 | if (postreset) | |
2768 | postreset(ap, classes); | |
e3180499 TH |
2769 | |
2770 | ata_eh_thaw_port(ap); | |
2771 | ||
96bd39ec TH |
2772 | if (classes[0] == ATA_DEV_UNKNOWN) |
2773 | rc = -ENODEV; | |
2774 | } | |
a62c0fc5 TH |
2775 | return rc; |
2776 | } | |
2777 | ||
623a3128 TH |
2778 | /** |
2779 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
2780 | * @dev: device to compare against |
2781 | * @new_class: class of the new device | |
2782 | * @new_id: IDENTIFY page of the new device | |
2783 | * | |
2784 | * Compare @new_class and @new_id against @dev and determine | |
2785 | * whether @dev is the device indicated by @new_class and | |
2786 | * @new_id. | |
2787 | * | |
2788 | * LOCKING: | |
2789 | * None. | |
2790 | * | |
2791 | * RETURNS: | |
2792 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
2793 | */ | |
3373efd8 TH |
2794 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
2795 | const u16 *new_id) | |
623a3128 TH |
2796 | { |
2797 | const u16 *old_id = dev->id; | |
2798 | unsigned char model[2][41], serial[2][21]; | |
2799 | u64 new_n_sectors; | |
2800 | ||
2801 | if (dev->class != new_class) { | |
f15a1daf TH |
2802 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
2803 | dev->class, new_class); | |
623a3128 TH |
2804 | return 0; |
2805 | } | |
2806 | ||
2807 | ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0])); | |
2808 | ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1])); | |
2809 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0])); | |
2810 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1])); | |
2811 | new_n_sectors = ata_id_n_sectors(new_id); | |
2812 | ||
2813 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
2814 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
2815 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
2816 | return 0; |
2817 | } | |
2818 | ||
2819 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
2820 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
2821 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
2822 | return 0; |
2823 | } | |
2824 | ||
2825 | if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { | |
f15a1daf TH |
2826 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
2827 | "%llu != %llu\n", | |
2828 | (unsigned long long)dev->n_sectors, | |
2829 | (unsigned long long)new_n_sectors); | |
623a3128 TH |
2830 | return 0; |
2831 | } | |
2832 | ||
2833 | return 1; | |
2834 | } | |
2835 | ||
2836 | /** | |
2837 | * ata_dev_revalidate - Revalidate ATA device | |
623a3128 TH |
2838 | * @dev: device to revalidate |
2839 | * @post_reset: is this revalidation after reset? | |
2840 | * | |
2841 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
2842 | * the port. | |
2843 | * | |
2844 | * LOCKING: | |
2845 | * Kernel thread context (may sleep) | |
2846 | * | |
2847 | * RETURNS: | |
2848 | * 0 on success, negative errno otherwise | |
2849 | */ | |
3373efd8 | 2850 | int ata_dev_revalidate(struct ata_device *dev, int post_reset) |
623a3128 | 2851 | { |
5eb45c02 | 2852 | unsigned int class = dev->class; |
f15a1daf | 2853 | u16 *id = (void *)dev->ap->sector_buf; |
623a3128 TH |
2854 | int rc; |
2855 | ||
5eb45c02 TH |
2856 | if (!ata_dev_enabled(dev)) { |
2857 | rc = -ENODEV; | |
2858 | goto fail; | |
2859 | } | |
623a3128 | 2860 | |
fe635c7e | 2861 | /* read ID data */ |
3373efd8 | 2862 | rc = ata_dev_read_id(dev, &class, post_reset, id); |
623a3128 TH |
2863 | if (rc) |
2864 | goto fail; | |
2865 | ||
2866 | /* is the device still there? */ | |
3373efd8 | 2867 | if (!ata_dev_same_device(dev, class, id)) { |
623a3128 TH |
2868 | rc = -ENODEV; |
2869 | goto fail; | |
2870 | } | |
2871 | ||
fe635c7e | 2872 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
623a3128 TH |
2873 | |
2874 | /* configure device according to the new ID */ | |
3373efd8 | 2875 | rc = ata_dev_configure(dev, 0); |
5eb45c02 TH |
2876 | if (rc == 0) |
2877 | return 0; | |
623a3128 TH |
2878 | |
2879 | fail: | |
f15a1daf | 2880 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
2881 | return rc; |
2882 | } | |
2883 | ||
98ac62de | 2884 | static const char * const ata_dma_blacklist [] = { |
f4b15fef AC |
2885 | "WDC AC11000H", NULL, |
2886 | "WDC AC22100H", NULL, | |
2887 | "WDC AC32500H", NULL, | |
2888 | "WDC AC33100H", NULL, | |
2889 | "WDC AC31600H", NULL, | |
2890 | "WDC AC32100H", "24.09P07", | |
2891 | "WDC AC23200L", "21.10N21", | |
2892 | "Compaq CRD-8241B", NULL, | |
2893 | "CRD-8400B", NULL, | |
2894 | "CRD-8480B", NULL, | |
2895 | "CRD-8482B", NULL, | |
2896 | "CRD-84", NULL, | |
2897 | "SanDisk SDP3B", NULL, | |
2898 | "SanDisk SDP3B-64", NULL, | |
2899 | "SANYO CD-ROM CRD", NULL, | |
2900 | "HITACHI CDR-8", NULL, | |
2e9edbf8 | 2901 | "HITACHI CDR-8335", NULL, |
f4b15fef | 2902 | "HITACHI CDR-8435", NULL, |
2e9edbf8 JG |
2903 | "Toshiba CD-ROM XM-6202B", NULL, |
2904 | "TOSHIBA CD-ROM XM-1702BC", NULL, | |
2905 | "CD-532E-A", NULL, | |
2906 | "E-IDE CD-ROM CR-840", NULL, | |
2907 | "CD-ROM Drive/F5A", NULL, | |
2908 | "WPI CDD-820", NULL, | |
f4b15fef | 2909 | "SAMSUNG CD-ROM SC-148C", NULL, |
2e9edbf8 | 2910 | "SAMSUNG CD-ROM SC", NULL, |
f4b15fef AC |
2911 | "SanDisk SDP3B-64", NULL, |
2912 | "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL, | |
2913 | "_NEC DV5800A", NULL, | |
2914 | "SAMSUNG CD-ROM SN-124", "N001" | |
1da177e4 | 2915 | }; |
2e9edbf8 | 2916 | |
f4b15fef AC |
2917 | static int ata_strim(char *s, size_t len) |
2918 | { | |
2919 | len = strnlen(s, len); | |
2920 | ||
2921 | /* ATAPI specifies that empty space is blank-filled; remove blanks */ | |
2922 | while ((len > 0) && (s[len - 1] == ' ')) { | |
2923 | len--; | |
2924 | s[len] = 0; | |
2925 | } | |
2926 | return len; | |
2927 | } | |
1da177e4 | 2928 | |
057ace5e | 2929 | static int ata_dma_blacklisted(const struct ata_device *dev) |
1da177e4 | 2930 | { |
f4b15fef AC |
2931 | unsigned char model_num[40]; |
2932 | unsigned char model_rev[16]; | |
2933 | unsigned int nlen, rlen; | |
1da177e4 LT |
2934 | int i; |
2935 | ||
f4b15fef AC |
2936 | ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS, |
2937 | sizeof(model_num)); | |
2938 | ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS, | |
2939 | sizeof(model_rev)); | |
2940 | nlen = ata_strim(model_num, sizeof(model_num)); | |
2941 | rlen = ata_strim(model_rev, sizeof(model_rev)); | |
1da177e4 | 2942 | |
f4b15fef AC |
2943 | for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) { |
2944 | if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) { | |
2945 | if (ata_dma_blacklist[i+1] == NULL) | |
2946 | return 1; | |
2947 | if (!strncmp(ata_dma_blacklist[i], model_rev, rlen)) | |
2948 | return 1; | |
2949 | } | |
2950 | } | |
1da177e4 LT |
2951 | return 0; |
2952 | } | |
2953 | ||
a6d5a51c TH |
2954 | /** |
2955 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
2956 | * @dev: Device to compute xfermask for |
2957 | * | |
acf356b1 TH |
2958 | * Compute supported xfermask of @dev and store it in |
2959 | * dev->*_mask. This function is responsible for applying all | |
2960 | * known limits including host controller limits, device | |
2961 | * blacklist, etc... | |
a6d5a51c | 2962 | * |
600511e8 TH |
2963 | * FIXME: The current implementation limits all transfer modes to |
2964 | * the fastest of the lowested device on the port. This is not | |
05c8e0ac | 2965 | * required on most controllers. |
600511e8 | 2966 | * |
a6d5a51c TH |
2967 | * LOCKING: |
2968 | * None. | |
a6d5a51c | 2969 | */ |
3373efd8 | 2970 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 2971 | { |
3373efd8 | 2972 | struct ata_port *ap = dev->ap; |
5444a6f4 | 2973 | struct ata_host_set *hs = ap->host_set; |
a6d5a51c TH |
2974 | unsigned long xfer_mask; |
2975 | int i; | |
1da177e4 | 2976 | |
565083e1 TH |
2977 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
2978 | ap->mwdma_mask, ap->udma_mask); | |
2979 | ||
2980 | /* Apply cable rule here. Don't apply it early because when | |
2981 | * we handle hot plug the cable type can itself change. | |
2982 | */ | |
2983 | if (ap->cbl == ATA_CBL_PATA40) | |
2984 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
1da177e4 | 2985 | |
5444a6f4 | 2986 | /* FIXME: Use port-wide xfermask for now */ |
a6d5a51c TH |
2987 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2988 | struct ata_device *d = &ap->device[i]; | |
565083e1 TH |
2989 | |
2990 | if (ata_dev_absent(d)) | |
2991 | continue; | |
2992 | ||
2993 | if (ata_dev_disabled(d)) { | |
2994 | /* to avoid violating device selection timing */ | |
2995 | xfer_mask &= ata_pack_xfermask(d->pio_mask, | |
2996 | UINT_MAX, UINT_MAX); | |
a6d5a51c | 2997 | continue; |
565083e1 TH |
2998 | } |
2999 | ||
3000 | xfer_mask &= ata_pack_xfermask(d->pio_mask, | |
3001 | d->mwdma_mask, d->udma_mask); | |
a6d5a51c TH |
3002 | xfer_mask &= ata_id_xfermask(d->id); |
3003 | if (ata_dma_blacklisted(d)) | |
3004 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
1da177e4 LT |
3005 | } |
3006 | ||
a6d5a51c | 3007 | if (ata_dma_blacklisted(dev)) |
f15a1daf TH |
3008 | ata_dev_printk(dev, KERN_WARNING, |
3009 | "device is on DMA blacklist, disabling DMA\n"); | |
a6d5a51c | 3010 | |
5444a6f4 AC |
3011 | if (hs->flags & ATA_HOST_SIMPLEX) { |
3012 | if (hs->simplex_claimed) | |
3013 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
3014 | } | |
565083e1 | 3015 | |
5444a6f4 AC |
3016 | if (ap->ops->mode_filter) |
3017 | xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask); | |
3018 | ||
565083e1 TH |
3019 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
3020 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
3021 | } |
3022 | ||
1da177e4 LT |
3023 | /** |
3024 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
3025 | * @dev: Device to which command will be sent |
3026 | * | |
780a87f7 JG |
3027 | * Issue SET FEATURES - XFER MODE command to device @dev |
3028 | * on port @ap. | |
3029 | * | |
1da177e4 | 3030 | * LOCKING: |
0cba632b | 3031 | * PCI/etc. bus probe sem. |
83206a29 TH |
3032 | * |
3033 | * RETURNS: | |
3034 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
3035 | */ |
3036 | ||
3373efd8 | 3037 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 3038 | { |
a0123703 | 3039 | struct ata_taskfile tf; |
83206a29 | 3040 | unsigned int err_mask; |
1da177e4 LT |
3041 | |
3042 | /* set up set-features taskfile */ | |
3043 | DPRINTK("set features - xfer mode\n"); | |
3044 | ||
3373efd8 | 3045 | ata_tf_init(dev, &tf); |
a0123703 TH |
3046 | tf.command = ATA_CMD_SET_FEATURES; |
3047 | tf.feature = SETFEATURES_XFER; | |
3048 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
3049 | tf.protocol = ATA_PROT_NODATA; | |
3050 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 3051 | |
3373efd8 | 3052 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
1da177e4 | 3053 | |
83206a29 TH |
3054 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
3055 | return err_mask; | |
1da177e4 LT |
3056 | } |
3057 | ||
8bf62ece AL |
3058 | /** |
3059 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 3060 | * @dev: Device to which command will be sent |
3373efd8 TH |
3061 | * @heads: Number of heads |
3062 | * @sectors: Number of sectors | |
8bf62ece AL |
3063 | * |
3064 | * LOCKING: | |
6aff8f1f TH |
3065 | * Kernel thread context (may sleep) |
3066 | * | |
3067 | * RETURNS: | |
3068 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 3069 | */ |
3373efd8 TH |
3070 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
3071 | u16 heads, u16 sectors) | |
8bf62ece | 3072 | { |
a0123703 | 3073 | struct ata_taskfile tf; |
6aff8f1f | 3074 | unsigned int err_mask; |
8bf62ece AL |
3075 | |
3076 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
3077 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 3078 | return AC_ERR_INVALID; |
8bf62ece AL |
3079 | |
3080 | /* set up init dev params taskfile */ | |
3081 | DPRINTK("init dev params \n"); | |
3082 | ||
3373efd8 | 3083 | ata_tf_init(dev, &tf); |
a0123703 TH |
3084 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
3085 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
3086 | tf.protocol = ATA_PROT_NODATA; | |
3087 | tf.nsect = sectors; | |
3088 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 3089 | |
3373efd8 | 3090 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
8bf62ece | 3091 | |
6aff8f1f TH |
3092 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
3093 | return err_mask; | |
8bf62ece AL |
3094 | } |
3095 | ||
1da177e4 | 3096 | /** |
0cba632b JG |
3097 | * ata_sg_clean - Unmap DMA memory associated with command |
3098 | * @qc: Command containing DMA memory to be released | |
3099 | * | |
3100 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
3101 | * |
3102 | * LOCKING: | |
0cba632b | 3103 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
3104 | */ |
3105 | ||
3106 | static void ata_sg_clean(struct ata_queued_cmd *qc) | |
3107 | { | |
3108 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 3109 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3110 | int dir = qc->dma_dir; |
cedc9a47 | 3111 | void *pad_buf = NULL; |
1da177e4 | 3112 | |
a4631474 TH |
3113 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
3114 | WARN_ON(sg == NULL); | |
1da177e4 LT |
3115 | |
3116 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 3117 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 3118 | |
2c13b7ce | 3119 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 3120 | |
cedc9a47 JG |
3121 | /* if we padded the buffer out to 32-bit bound, and data |
3122 | * xfer direction is from-device, we must copy from the | |
3123 | * pad buffer back into the supplied buffer | |
3124 | */ | |
3125 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
3126 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3127 | ||
3128 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d | 3129 | if (qc->n_elem) |
2f1f610b | 3130 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
cedc9a47 JG |
3131 | /* restore last sg */ |
3132 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
3133 | if (pad_buf) { | |
3134 | struct scatterlist *psg = &qc->pad_sgent; | |
3135 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3136 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
dfa15988 | 3137 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3138 | } |
3139 | } else { | |
2e242fa9 | 3140 | if (qc->n_elem) |
2f1f610b | 3141 | dma_unmap_single(ap->dev, |
e1410f2d JG |
3142 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
3143 | dir); | |
cedc9a47 JG |
3144 | /* restore sg */ |
3145 | sg->length += qc->pad_len; | |
3146 | if (pad_buf) | |
3147 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
3148 | pad_buf, qc->pad_len); | |
3149 | } | |
1da177e4 LT |
3150 | |
3151 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 3152 | qc->__sg = NULL; |
1da177e4 LT |
3153 | } |
3154 | ||
3155 | /** | |
3156 | * ata_fill_sg - Fill PCI IDE PRD table | |
3157 | * @qc: Metadata associated with taskfile to be transferred | |
3158 | * | |
780a87f7 JG |
3159 | * Fill PCI IDE PRD (scatter-gather) table with segments |
3160 | * associated with the current disk command. | |
3161 | * | |
1da177e4 | 3162 | * LOCKING: |
780a87f7 | 3163 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
3164 | * |
3165 | */ | |
3166 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
3167 | { | |
1da177e4 | 3168 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
3169 | struct scatterlist *sg; |
3170 | unsigned int idx; | |
1da177e4 | 3171 | |
a4631474 | 3172 | WARN_ON(qc->__sg == NULL); |
f131883e | 3173 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
3174 | |
3175 | idx = 0; | |
cedc9a47 | 3176 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
3177 | u32 addr, offset; |
3178 | u32 sg_len, len; | |
3179 | ||
3180 | /* determine if physical DMA addr spans 64K boundary. | |
3181 | * Note h/w doesn't support 64-bit, so we unconditionally | |
3182 | * truncate dma_addr_t to u32. | |
3183 | */ | |
3184 | addr = (u32) sg_dma_address(sg); | |
3185 | sg_len = sg_dma_len(sg); | |
3186 | ||
3187 | while (sg_len) { | |
3188 | offset = addr & 0xffff; | |
3189 | len = sg_len; | |
3190 | if ((offset + sg_len) > 0x10000) | |
3191 | len = 0x10000 - offset; | |
3192 | ||
3193 | ap->prd[idx].addr = cpu_to_le32(addr); | |
3194 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
3195 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
3196 | ||
3197 | idx++; | |
3198 | sg_len -= len; | |
3199 | addr += len; | |
3200 | } | |
3201 | } | |
3202 | ||
3203 | if (idx) | |
3204 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
3205 | } | |
3206 | /** | |
3207 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
3208 | * @qc: Metadata associated with taskfile to check | |
3209 | * | |
780a87f7 JG |
3210 | * Allow low-level driver to filter ATA PACKET commands, returning |
3211 | * a status indicating whether or not it is OK to use DMA for the | |
3212 | * supplied PACKET command. | |
3213 | * | |
1da177e4 | 3214 | * LOCKING: |
0cba632b JG |
3215 | * spin_lock_irqsave(host_set lock) |
3216 | * | |
1da177e4 LT |
3217 | * RETURNS: 0 when ATAPI DMA can be used |
3218 | * nonzero otherwise | |
3219 | */ | |
3220 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
3221 | { | |
3222 | struct ata_port *ap = qc->ap; | |
3223 | int rc = 0; /* Assume ATAPI DMA is OK by default */ | |
3224 | ||
3225 | if (ap->ops->check_atapi_dma) | |
3226 | rc = ap->ops->check_atapi_dma(qc); | |
3227 | ||
c2bbc551 AL |
3228 | /* We don't support polling DMA. |
3229 | * Use PIO if the LLDD handles only interrupts in | |
3230 | * the HSM_ST_LAST state and the ATAPI device | |
3231 | * generates CDB interrupts. | |
3232 | */ | |
3233 | if ((ap->flags & ATA_FLAG_PIO_POLLING) && | |
3234 | (qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
3235 | rc = 1; | |
3236 | ||
1da177e4 LT |
3237 | return rc; |
3238 | } | |
3239 | /** | |
3240 | * ata_qc_prep - Prepare taskfile for submission | |
3241 | * @qc: Metadata associated with taskfile to be prepared | |
3242 | * | |
780a87f7 JG |
3243 | * Prepare ATA taskfile for submission. |
3244 | * | |
1da177e4 LT |
3245 | * LOCKING: |
3246 | * spin_lock_irqsave(host_set lock) | |
3247 | */ | |
3248 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
3249 | { | |
3250 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
3251 | return; | |
3252 | ||
3253 | ata_fill_sg(qc); | |
3254 | } | |
3255 | ||
e46834cd BK |
3256 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
3257 | ||
0cba632b JG |
3258 | /** |
3259 | * ata_sg_init_one - Associate command with memory buffer | |
3260 | * @qc: Command to be associated | |
3261 | * @buf: Memory buffer | |
3262 | * @buflen: Length of memory buffer, in bytes. | |
3263 | * | |
3264 | * Initialize the data-related elements of queued_cmd @qc | |
3265 | * to point to a single memory buffer, @buf of byte length @buflen. | |
3266 | * | |
3267 | * LOCKING: | |
3268 | * spin_lock_irqsave(host_set lock) | |
3269 | */ | |
3270 | ||
1da177e4 LT |
3271 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
3272 | { | |
3273 | struct scatterlist *sg; | |
3274 | ||
3275 | qc->flags |= ATA_QCFLAG_SINGLE; | |
3276 | ||
3277 | memset(&qc->sgent, 0, sizeof(qc->sgent)); | |
cedc9a47 | 3278 | qc->__sg = &qc->sgent; |
1da177e4 | 3279 | qc->n_elem = 1; |
cedc9a47 | 3280 | qc->orig_n_elem = 1; |
1da177e4 LT |
3281 | qc->buf_virt = buf; |
3282 | ||
cedc9a47 | 3283 | sg = qc->__sg; |
f0612bbc | 3284 | sg_init_one(sg, buf, buflen); |
1da177e4 LT |
3285 | } |
3286 | ||
0cba632b JG |
3287 | /** |
3288 | * ata_sg_init - Associate command with scatter-gather table. | |
3289 | * @qc: Command to be associated | |
3290 | * @sg: Scatter-gather table. | |
3291 | * @n_elem: Number of elements in s/g table. | |
3292 | * | |
3293 | * Initialize the data-related elements of queued_cmd @qc | |
3294 | * to point to a scatter-gather table @sg, containing @n_elem | |
3295 | * elements. | |
3296 | * | |
3297 | * LOCKING: | |
3298 | * spin_lock_irqsave(host_set lock) | |
3299 | */ | |
3300 | ||
1da177e4 LT |
3301 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
3302 | unsigned int n_elem) | |
3303 | { | |
3304 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 3305 | qc->__sg = sg; |
1da177e4 | 3306 | qc->n_elem = n_elem; |
cedc9a47 | 3307 | qc->orig_n_elem = n_elem; |
1da177e4 LT |
3308 | } |
3309 | ||
3310 | /** | |
0cba632b JG |
3311 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
3312 | * @qc: Command with memory buffer to be mapped. | |
3313 | * | |
3314 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
3315 | * |
3316 | * LOCKING: | |
3317 | * spin_lock_irqsave(host_set lock) | |
3318 | * | |
3319 | * RETURNS: | |
0cba632b | 3320 | * Zero on success, negative on error. |
1da177e4 LT |
3321 | */ |
3322 | ||
3323 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
3324 | { | |
3325 | struct ata_port *ap = qc->ap; | |
3326 | int dir = qc->dma_dir; | |
cedc9a47 | 3327 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3328 | dma_addr_t dma_address; |
2e242fa9 | 3329 | int trim_sg = 0; |
1da177e4 | 3330 | |
cedc9a47 JG |
3331 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3332 | qc->pad_len = sg->length & 3; | |
3333 | if (qc->pad_len) { | |
3334 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3335 | struct scatterlist *psg = &qc->pad_sgent; | |
3336 | ||
a4631474 | 3337 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3338 | |
3339 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3340 | ||
3341 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
3342 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
3343 | qc->pad_len); | |
3344 | ||
3345 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3346 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3347 | /* trim sg */ | |
3348 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
3349 | if (sg->length == 0) |
3350 | trim_sg = 1; | |
cedc9a47 JG |
3351 | |
3352 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
3353 | sg->length, qc->pad_len); | |
3354 | } | |
3355 | ||
2e242fa9 TH |
3356 | if (trim_sg) { |
3357 | qc->n_elem--; | |
e1410f2d JG |
3358 | goto skip_map; |
3359 | } | |
3360 | ||
2f1f610b | 3361 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
32529e01 | 3362 | sg->length, dir); |
537a95d9 TH |
3363 | if (dma_mapping_error(dma_address)) { |
3364 | /* restore sg */ | |
3365 | sg->length += qc->pad_len; | |
1da177e4 | 3366 | return -1; |
537a95d9 | 3367 | } |
1da177e4 LT |
3368 | |
3369 | sg_dma_address(sg) = dma_address; | |
32529e01 | 3370 | sg_dma_len(sg) = sg->length; |
1da177e4 | 3371 | |
2e242fa9 | 3372 | skip_map: |
1da177e4 LT |
3373 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
3374 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3375 | ||
3376 | return 0; | |
3377 | } | |
3378 | ||
3379 | /** | |
0cba632b JG |
3380 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
3381 | * @qc: Command with scatter-gather table to be mapped. | |
3382 | * | |
3383 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
3384 | * |
3385 | * LOCKING: | |
3386 | * spin_lock_irqsave(host_set lock) | |
3387 | * | |
3388 | * RETURNS: | |
0cba632b | 3389 | * Zero on success, negative on error. |
1da177e4 LT |
3390 | * |
3391 | */ | |
3392 | ||
3393 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
3394 | { | |
3395 | struct ata_port *ap = qc->ap; | |
cedc9a47 JG |
3396 | struct scatterlist *sg = qc->__sg; |
3397 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
e1410f2d | 3398 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 LT |
3399 | |
3400 | VPRINTK("ENTER, ata%u\n", ap->id); | |
a4631474 | 3401 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 3402 | |
cedc9a47 JG |
3403 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3404 | qc->pad_len = lsg->length & 3; | |
3405 | if (qc->pad_len) { | |
3406 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3407 | struct scatterlist *psg = &qc->pad_sgent; | |
3408 | unsigned int offset; | |
3409 | ||
a4631474 | 3410 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3411 | |
3412 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3413 | ||
3414 | /* | |
3415 | * psg->page/offset are used to copy to-be-written | |
3416 | * data in this function or read data in ata_sg_clean. | |
3417 | */ | |
3418 | offset = lsg->offset + lsg->length - qc->pad_len; | |
3419 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
3420 | psg->offset = offset_in_page(offset); | |
3421 | ||
3422 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
3423 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3424 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
dfa15988 | 3425 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3426 | } |
3427 | ||
3428 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3429 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3430 | /* trim last sg */ | |
3431 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
3432 | if (lsg->length == 0) |
3433 | trim_sg = 1; | |
cedc9a47 JG |
3434 | |
3435 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
3436 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
3437 | } | |
3438 | ||
e1410f2d JG |
3439 | pre_n_elem = qc->n_elem; |
3440 | if (trim_sg && pre_n_elem) | |
3441 | pre_n_elem--; | |
3442 | ||
3443 | if (!pre_n_elem) { | |
3444 | n_elem = 0; | |
3445 | goto skip_map; | |
3446 | } | |
3447 | ||
1da177e4 | 3448 | dir = qc->dma_dir; |
2f1f610b | 3449 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
3450 | if (n_elem < 1) { |
3451 | /* restore last sg */ | |
3452 | lsg->length += qc->pad_len; | |
1da177e4 | 3453 | return -1; |
537a95d9 | 3454 | } |
1da177e4 LT |
3455 | |
3456 | DPRINTK("%d sg elements mapped\n", n_elem); | |
3457 | ||
e1410f2d | 3458 | skip_map: |
1da177e4 LT |
3459 | qc->n_elem = n_elem; |
3460 | ||
3461 | return 0; | |
3462 | } | |
3463 | ||
0baab86b | 3464 | /** |
c893a3ae | 3465 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
3466 | * @buf: Buffer to swap |
3467 | * @buf_words: Number of 16-bit words in buffer. | |
3468 | * | |
3469 | * Swap halves of 16-bit words if needed to convert from | |
3470 | * little-endian byte order to native cpu byte order, or | |
3471 | * vice-versa. | |
3472 | * | |
3473 | * LOCKING: | |
6f0ef4fa | 3474 | * Inherited from caller. |
0baab86b | 3475 | */ |
1da177e4 LT |
3476 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
3477 | { | |
3478 | #ifdef __BIG_ENDIAN | |
3479 | unsigned int i; | |
3480 | ||
3481 | for (i = 0; i < buf_words; i++) | |
3482 | buf[i] = le16_to_cpu(buf[i]); | |
3483 | #endif /* __BIG_ENDIAN */ | |
3484 | } | |
3485 | ||
6ae4cfb5 AL |
3486 | /** |
3487 | * ata_mmio_data_xfer - Transfer data by MMIO | |
3488 | * @ap: port to read/write | |
3489 | * @buf: data buffer | |
3490 | * @buflen: buffer length | |
344babaa | 3491 | * @write_data: read/write |
6ae4cfb5 AL |
3492 | * |
3493 | * Transfer data from/to the device data register by MMIO. | |
3494 | * | |
3495 | * LOCKING: | |
3496 | * Inherited from caller. | |
6ae4cfb5 AL |
3497 | */ |
3498 | ||
1da177e4 LT |
3499 | static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3500 | unsigned int buflen, int write_data) | |
3501 | { | |
3502 | unsigned int i; | |
3503 | unsigned int words = buflen >> 1; | |
3504 | u16 *buf16 = (u16 *) buf; | |
3505 | void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr; | |
3506 | ||
6ae4cfb5 | 3507 | /* Transfer multiple of 2 bytes */ |
1da177e4 LT |
3508 | if (write_data) { |
3509 | for (i = 0; i < words; i++) | |
3510 | writew(le16_to_cpu(buf16[i]), mmio); | |
3511 | } else { | |
3512 | for (i = 0; i < words; i++) | |
3513 | buf16[i] = cpu_to_le16(readw(mmio)); | |
3514 | } | |
6ae4cfb5 AL |
3515 | |
3516 | /* Transfer trailing 1 byte, if any. */ | |
3517 | if (unlikely(buflen & 0x01)) { | |
3518 | u16 align_buf[1] = { 0 }; | |
3519 | unsigned char *trailing_buf = buf + buflen - 1; | |
3520 | ||
3521 | if (write_data) { | |
3522 | memcpy(align_buf, trailing_buf, 1); | |
3523 | writew(le16_to_cpu(align_buf[0]), mmio); | |
3524 | } else { | |
3525 | align_buf[0] = cpu_to_le16(readw(mmio)); | |
3526 | memcpy(trailing_buf, align_buf, 1); | |
3527 | } | |
3528 | } | |
1da177e4 LT |
3529 | } |
3530 | ||
6ae4cfb5 AL |
3531 | /** |
3532 | * ata_pio_data_xfer - Transfer data by PIO | |
3533 | * @ap: port to read/write | |
3534 | * @buf: data buffer | |
3535 | * @buflen: buffer length | |
344babaa | 3536 | * @write_data: read/write |
6ae4cfb5 AL |
3537 | * |
3538 | * Transfer data from/to the device data register by PIO. | |
3539 | * | |
3540 | * LOCKING: | |
3541 | * Inherited from caller. | |
6ae4cfb5 AL |
3542 | */ |
3543 | ||
1da177e4 LT |
3544 | static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3545 | unsigned int buflen, int write_data) | |
3546 | { | |
6ae4cfb5 | 3547 | unsigned int words = buflen >> 1; |
1da177e4 | 3548 | |
6ae4cfb5 | 3549 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 3550 | if (write_data) |
6ae4cfb5 | 3551 | outsw(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 3552 | else |
6ae4cfb5 AL |
3553 | insw(ap->ioaddr.data_addr, buf, words); |
3554 | ||
3555 | /* Transfer trailing 1 byte, if any. */ | |
3556 | if (unlikely(buflen & 0x01)) { | |
3557 | u16 align_buf[1] = { 0 }; | |
3558 | unsigned char *trailing_buf = buf + buflen - 1; | |
3559 | ||
3560 | if (write_data) { | |
3561 | memcpy(align_buf, trailing_buf, 1); | |
3562 | outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); | |
3563 | } else { | |
3564 | align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr)); | |
3565 | memcpy(trailing_buf, align_buf, 1); | |
3566 | } | |
3567 | } | |
1da177e4 LT |
3568 | } |
3569 | ||
6ae4cfb5 AL |
3570 | /** |
3571 | * ata_data_xfer - Transfer data from/to the data register. | |
3572 | * @ap: port to read/write | |
3573 | * @buf: data buffer | |
3574 | * @buflen: buffer length | |
3575 | * @do_write: read/write | |
3576 | * | |
3577 | * Transfer data from/to the device data register. | |
3578 | * | |
3579 | * LOCKING: | |
3580 | * Inherited from caller. | |
6ae4cfb5 AL |
3581 | */ |
3582 | ||
1da177e4 LT |
3583 | static void ata_data_xfer(struct ata_port *ap, unsigned char *buf, |
3584 | unsigned int buflen, int do_write) | |
3585 | { | |
a1bd9e68 AC |
3586 | /* Make the crap hardware pay the costs not the good stuff */ |
3587 | if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) { | |
3588 | unsigned long flags; | |
3589 | local_irq_save(flags); | |
3590 | if (ap->flags & ATA_FLAG_MMIO) | |
3591 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3592 | else | |
3593 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3594 | local_irq_restore(flags); | |
3595 | } else { | |
3596 | if (ap->flags & ATA_FLAG_MMIO) | |
3597 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3598 | else | |
3599 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3600 | } | |
1da177e4 LT |
3601 | } |
3602 | ||
6ae4cfb5 AL |
3603 | /** |
3604 | * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. | |
3605 | * @qc: Command on going | |
3606 | * | |
3607 | * Transfer ATA_SECT_SIZE of data from/to the ATA device. | |
3608 | * | |
3609 | * LOCKING: | |
3610 | * Inherited from caller. | |
3611 | */ | |
3612 | ||
1da177e4 LT |
3613 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
3614 | { | |
3615 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3616 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3617 | struct ata_port *ap = qc->ap; |
3618 | struct page *page; | |
3619 | unsigned int offset; | |
3620 | unsigned char *buf; | |
3621 | ||
3622 | if (qc->cursect == (qc->nsect - 1)) | |
14be71f4 | 3623 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3624 | |
3625 | page = sg[qc->cursg].page; | |
3626 | offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; | |
3627 | ||
3628 | /* get the current page and offset */ | |
3629 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3630 | offset %= PAGE_SIZE; | |
3631 | ||
1da177e4 LT |
3632 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
3633 | ||
91b8b313 AL |
3634 | if (PageHighMem(page)) { |
3635 | unsigned long flags; | |
3636 | ||
3637 | local_irq_save(flags); | |
3638 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 3639 | |
91b8b313 AL |
3640 | /* do the actual data transfer */ |
3641 | ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write); | |
1da177e4 | 3642 | |
91b8b313 AL |
3643 | kunmap_atomic(buf, KM_IRQ0); |
3644 | local_irq_restore(flags); | |
3645 | } else { | |
3646 | buf = page_address(page); | |
3647 | ata_data_xfer(ap, buf + offset, ATA_SECT_SIZE, do_write); | |
3648 | } | |
1da177e4 LT |
3649 | |
3650 | qc->cursect++; | |
3651 | qc->cursg_ofs++; | |
3652 | ||
32529e01 | 3653 | if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) { |
1da177e4 LT |
3654 | qc->cursg++; |
3655 | qc->cursg_ofs = 0; | |
3656 | } | |
1da177e4 | 3657 | } |
1da177e4 | 3658 | |
07f6f7d0 AL |
3659 | /** |
3660 | * ata_pio_sectors - Transfer one or many 512-byte sectors. | |
3661 | * @qc: Command on going | |
3662 | * | |
3663 | * Transfer one or many ATA_SECT_SIZE of data from/to the | |
3664 | * ATA device for the DRQ request. | |
3665 | * | |
3666 | * LOCKING: | |
3667 | * Inherited from caller. | |
3668 | */ | |
1da177e4 | 3669 | |
07f6f7d0 AL |
3670 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
3671 | { | |
3672 | if (is_multi_taskfile(&qc->tf)) { | |
3673 | /* READ/WRITE MULTIPLE */ | |
3674 | unsigned int nsect; | |
3675 | ||
587005de | 3676 | WARN_ON(qc->dev->multi_count == 0); |
1da177e4 | 3677 | |
07f6f7d0 AL |
3678 | nsect = min(qc->nsect - qc->cursect, qc->dev->multi_count); |
3679 | while (nsect--) | |
3680 | ata_pio_sector(qc); | |
3681 | } else | |
3682 | ata_pio_sector(qc); | |
3683 | } | |
3684 | ||
c71c1857 AL |
3685 | /** |
3686 | * atapi_send_cdb - Write CDB bytes to hardware | |
3687 | * @ap: Port to which ATAPI device is attached. | |
3688 | * @qc: Taskfile currently active | |
3689 | * | |
3690 | * When device has indicated its readiness to accept | |
3691 | * a CDB, this function is called. Send the CDB. | |
3692 | * | |
3693 | * LOCKING: | |
3694 | * caller. | |
3695 | */ | |
3696 | ||
3697 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) | |
3698 | { | |
3699 | /* send SCSI cdb */ | |
3700 | DPRINTK("send cdb\n"); | |
db024d53 | 3701 | WARN_ON(qc->dev->cdb_len < 12); |
c71c1857 | 3702 | |
db024d53 | 3703 | ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); |
c71c1857 AL |
3704 | ata_altstatus(ap); /* flush */ |
3705 | ||
3706 | switch (qc->tf.protocol) { | |
3707 | case ATA_PROT_ATAPI: | |
3708 | ap->hsm_task_state = HSM_ST; | |
3709 | break; | |
3710 | case ATA_PROT_ATAPI_NODATA: | |
3711 | ap->hsm_task_state = HSM_ST_LAST; | |
3712 | break; | |
3713 | case ATA_PROT_ATAPI_DMA: | |
3714 | ap->hsm_task_state = HSM_ST_LAST; | |
3715 | /* initiate bmdma */ | |
3716 | ap->ops->bmdma_start(qc); | |
3717 | break; | |
3718 | } | |
1da177e4 LT |
3719 | } |
3720 | ||
6ae4cfb5 AL |
3721 | /** |
3722 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3723 | * @qc: Command on going | |
3724 | * @bytes: number of bytes | |
3725 | * | |
3726 | * Transfer Transfer data from/to the ATAPI device. | |
3727 | * | |
3728 | * LOCKING: | |
3729 | * Inherited from caller. | |
3730 | * | |
3731 | */ | |
3732 | ||
1da177e4 LT |
3733 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
3734 | { | |
3735 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3736 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3737 | struct ata_port *ap = qc->ap; |
3738 | struct page *page; | |
3739 | unsigned char *buf; | |
3740 | unsigned int offset, count; | |
3741 | ||
563a6e1f | 3742 | if (qc->curbytes + bytes >= qc->nbytes) |
14be71f4 | 3743 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3744 | |
3745 | next_sg: | |
563a6e1f | 3746 | if (unlikely(qc->cursg >= qc->n_elem)) { |
7fb6ec28 | 3747 | /* |
563a6e1f AL |
3748 | * The end of qc->sg is reached and the device expects |
3749 | * more data to transfer. In order not to overrun qc->sg | |
3750 | * and fulfill length specified in the byte count register, | |
3751 | * - for read case, discard trailing data from the device | |
3752 | * - for write case, padding zero data to the device | |
3753 | */ | |
3754 | u16 pad_buf[1] = { 0 }; | |
3755 | unsigned int words = bytes >> 1; | |
3756 | unsigned int i; | |
3757 | ||
3758 | if (words) /* warning if bytes > 1 */ | |
f15a1daf TH |
3759 | ata_dev_printk(qc->dev, KERN_WARNING, |
3760 | "%u bytes trailing data\n", bytes); | |
563a6e1f AL |
3761 | |
3762 | for (i = 0; i < words; i++) | |
3763 | ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write); | |
3764 | ||
14be71f4 | 3765 | ap->hsm_task_state = HSM_ST_LAST; |
563a6e1f AL |
3766 | return; |
3767 | } | |
3768 | ||
cedc9a47 | 3769 | sg = &qc->__sg[qc->cursg]; |
1da177e4 | 3770 | |
1da177e4 LT |
3771 | page = sg->page; |
3772 | offset = sg->offset + qc->cursg_ofs; | |
3773 | ||
3774 | /* get the current page and offset */ | |
3775 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3776 | offset %= PAGE_SIZE; | |
3777 | ||
6952df03 | 3778 | /* don't overrun current sg */ |
32529e01 | 3779 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
3780 | |
3781 | /* don't cross page boundaries */ | |
3782 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
3783 | ||
7282aa4b AL |
3784 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
3785 | ||
91b8b313 AL |
3786 | if (PageHighMem(page)) { |
3787 | unsigned long flags; | |
3788 | ||
3789 | local_irq_save(flags); | |
3790 | buf = kmap_atomic(page, KM_IRQ0); | |
083958d3 | 3791 | |
91b8b313 AL |
3792 | /* do the actual data transfer */ |
3793 | ata_data_xfer(ap, buf + offset, count, do_write); | |
7282aa4b | 3794 | |
91b8b313 AL |
3795 | kunmap_atomic(buf, KM_IRQ0); |
3796 | local_irq_restore(flags); | |
3797 | } else { | |
3798 | buf = page_address(page); | |
3799 | ata_data_xfer(ap, buf + offset, count, do_write); | |
3800 | } | |
1da177e4 LT |
3801 | |
3802 | bytes -= count; | |
3803 | qc->curbytes += count; | |
3804 | qc->cursg_ofs += count; | |
3805 | ||
32529e01 | 3806 | if (qc->cursg_ofs == sg->length) { |
1da177e4 LT |
3807 | qc->cursg++; |
3808 | qc->cursg_ofs = 0; | |
3809 | } | |
3810 | ||
563a6e1f | 3811 | if (bytes) |
1da177e4 | 3812 | goto next_sg; |
1da177e4 LT |
3813 | } |
3814 | ||
6ae4cfb5 AL |
3815 | /** |
3816 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3817 | * @qc: Command on going | |
3818 | * | |
3819 | * Transfer Transfer data from/to the ATAPI device. | |
3820 | * | |
3821 | * LOCKING: | |
3822 | * Inherited from caller. | |
6ae4cfb5 AL |
3823 | */ |
3824 | ||
1da177e4 LT |
3825 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
3826 | { | |
3827 | struct ata_port *ap = qc->ap; | |
3828 | struct ata_device *dev = qc->dev; | |
3829 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
3830 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
3831 | ||
3832 | ap->ops->tf_read(ap, &qc->tf); | |
3833 | ireason = qc->tf.nsect; | |
3834 | bc_lo = qc->tf.lbam; | |
3835 | bc_hi = qc->tf.lbah; | |
3836 | bytes = (bc_hi << 8) | bc_lo; | |
3837 | ||
3838 | /* shall be cleared to zero, indicating xfer of data */ | |
3839 | if (ireason & (1 << 0)) | |
3840 | goto err_out; | |
3841 | ||
3842 | /* make sure transfer direction matches expected */ | |
3843 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
3844 | if (do_write != i_write) | |
3845 | goto err_out; | |
3846 | ||
312f7da2 AL |
3847 | VPRINTK("ata%u: xfering %d bytes\n", ap->id, bytes); |
3848 | ||
1da177e4 LT |
3849 | __atapi_pio_bytes(qc, bytes); |
3850 | ||
3851 | return; | |
3852 | ||
3853 | err_out: | |
f15a1daf | 3854 | ata_dev_printk(dev, KERN_INFO, "ATAPI check failed\n"); |
11a56d24 | 3855 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3856 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
3857 | } |
3858 | ||
3859 | /** | |
c234fb00 AL |
3860 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
3861 | * @ap: the target ata_port | |
3862 | * @qc: qc on going | |
1da177e4 | 3863 | * |
c234fb00 AL |
3864 | * RETURNS: |
3865 | * 1 if ok in workqueue, 0 otherwise. | |
1da177e4 | 3866 | */ |
c234fb00 AL |
3867 | |
3868 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc) | |
1da177e4 | 3869 | { |
c234fb00 AL |
3870 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
3871 | return 1; | |
1da177e4 | 3872 | |
c234fb00 AL |
3873 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
3874 | if (qc->tf.protocol == ATA_PROT_PIO && | |
3875 | (qc->tf.flags & ATA_TFLAG_WRITE)) | |
3876 | return 1; | |
1da177e4 | 3877 | |
c234fb00 AL |
3878 | if (is_atapi_taskfile(&qc->tf) && |
3879 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
3880 | return 1; | |
fe79e683 AL |
3881 | } |
3882 | ||
c234fb00 AL |
3883 | return 0; |
3884 | } | |
1da177e4 | 3885 | |
c17ea20d TH |
3886 | /** |
3887 | * ata_hsm_qc_complete - finish a qc running on standard HSM | |
3888 | * @qc: Command to complete | |
3889 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
3890 | * | |
3891 | * Finish @qc which is running on standard HSM. | |
3892 | * | |
3893 | * LOCKING: | |
3894 | * If @in_wq is zero, spin_lock_irqsave(host_set lock). | |
3895 | * Otherwise, none on entry and grabs host lock. | |
3896 | */ | |
3897 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) | |
3898 | { | |
3899 | struct ata_port *ap = qc->ap; | |
3900 | unsigned long flags; | |
3901 | ||
3902 | if (ap->ops->error_handler) { | |
3903 | if (in_wq) { | |
3904 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
3905 | ||
3906 | /* EH might have kicked in while host_set lock | |
3907 | * is released. | |
3908 | */ | |
3909 | qc = ata_qc_from_tag(ap, qc->tag); | |
3910 | if (qc) { | |
3911 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { | |
3912 | ata_irq_on(ap); | |
3913 | ata_qc_complete(qc); | |
3914 | } else | |
3915 | ata_port_freeze(ap); | |
3916 | } | |
3917 | ||
3918 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
3919 | } else { | |
3920 | if (likely(!(qc->err_mask & AC_ERR_HSM))) | |
3921 | ata_qc_complete(qc); | |
3922 | else | |
3923 | ata_port_freeze(ap); | |
3924 | } | |
3925 | } else { | |
3926 | if (in_wq) { | |
3927 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
3928 | ata_irq_on(ap); | |
3929 | ata_qc_complete(qc); | |
3930 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
3931 | } else | |
3932 | ata_qc_complete(qc); | |
3933 | } | |
3934 | } | |
3935 | ||
bb5cb290 AL |
3936 | /** |
3937 | * ata_hsm_move - move the HSM to the next state. | |
3938 | * @ap: the target ata_port | |
3939 | * @qc: qc on going | |
3940 | * @status: current device status | |
3941 | * @in_wq: 1 if called from workqueue, 0 otherwise | |
3942 | * | |
3943 | * RETURNS: | |
3944 | * 1 when poll next status needed, 0 otherwise. | |
3945 | */ | |
3946 | ||
3947 | static int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, | |
3948 | u8 status, int in_wq) | |
e2cec771 | 3949 | { |
bb5cb290 AL |
3950 | unsigned long flags = 0; |
3951 | int poll_next; | |
3952 | ||
6912ccd5 AL |
3953 | WARN_ON((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
3954 | ||
bb5cb290 AL |
3955 | /* Make sure ata_qc_issue_prot() does not throw things |
3956 | * like DMA polling into the workqueue. Notice that | |
3957 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). | |
3958 | */ | |
c234fb00 | 3959 | WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
bb5cb290 | 3960 | |
e2cec771 | 3961 | fsm_start: |
999bb6f4 AL |
3962 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
3963 | ap->id, qc->tf.protocol, ap->hsm_task_state, status); | |
3964 | ||
e2cec771 AL |
3965 | switch (ap->hsm_task_state) { |
3966 | case HSM_ST_FIRST: | |
bb5cb290 AL |
3967 | /* Send first data block or PACKET CDB */ |
3968 | ||
3969 | /* If polling, we will stay in the work queue after | |
3970 | * sending the data. Otherwise, interrupt handler | |
3971 | * takes over after sending the data. | |
3972 | */ | |
3973 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); | |
3974 | ||
e2cec771 AL |
3975 | /* check device status */ |
3976 | if (unlikely((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ)) { | |
3977 | /* Wrong status. Let EH handle this */ | |
11a56d24 | 3978 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3979 | ap->hsm_task_state = HSM_ST_ERR; |
e2cec771 | 3980 | goto fsm_start; |
1da177e4 LT |
3981 | } |
3982 | ||
71601958 AL |
3983 | /* Device should not ask for data transfer (DRQ=1) |
3984 | * when it finds something wrong. | |
eee6c32f AL |
3985 | * We ignore DRQ here and stop the HSM by |
3986 | * changing hsm_task_state to HSM_ST_ERR and | |
3987 | * let the EH abort the command or reset the device. | |
71601958 AL |
3988 | */ |
3989 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
3990 | printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", | |
3991 | ap->id, status); | |
3992 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
3993 | ap->hsm_task_state = HSM_ST_ERR; |
3994 | goto fsm_start; | |
71601958 | 3995 | } |
1da177e4 | 3996 | |
bb5cb290 AL |
3997 | /* Send the CDB (atapi) or the first data block (ata pio out). |
3998 | * During the state transition, interrupt handler shouldn't | |
3999 | * be invoked before the data transfer is complete and | |
4000 | * hsm_task_state is changed. Hence, the following locking. | |
4001 | */ | |
4002 | if (in_wq) | |
4003 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
1da177e4 | 4004 | |
bb5cb290 AL |
4005 | if (qc->tf.protocol == ATA_PROT_PIO) { |
4006 | /* PIO data out protocol. | |
4007 | * send first data block. | |
4008 | */ | |
0565c26d | 4009 | |
bb5cb290 AL |
4010 | /* ata_pio_sectors() might change the state |
4011 | * to HSM_ST_LAST. so, the state is changed here | |
4012 | * before ata_pio_sectors(). | |
4013 | */ | |
4014 | ap->hsm_task_state = HSM_ST; | |
4015 | ata_pio_sectors(qc); | |
4016 | ata_altstatus(ap); /* flush */ | |
4017 | } else | |
4018 | /* send CDB */ | |
4019 | atapi_send_cdb(ap, qc); | |
4020 | ||
4021 | if (in_wq) | |
4022 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
4023 | ||
4024 | /* if polling, ata_pio_task() handles the rest. | |
4025 | * otherwise, interrupt handler takes over from here. | |
4026 | */ | |
e2cec771 | 4027 | break; |
1c848984 | 4028 | |
e2cec771 AL |
4029 | case HSM_ST: |
4030 | /* complete command or read/write the data register */ | |
4031 | if (qc->tf.protocol == ATA_PROT_ATAPI) { | |
4032 | /* ATAPI PIO protocol */ | |
4033 | if ((status & ATA_DRQ) == 0) { | |
4034 | /* no more data to transfer */ | |
4035 | ap->hsm_task_state = HSM_ST_LAST; | |
4036 | goto fsm_start; | |
4037 | } | |
1da177e4 | 4038 | |
71601958 AL |
4039 | /* Device should not ask for data transfer (DRQ=1) |
4040 | * when it finds something wrong. | |
eee6c32f AL |
4041 | * We ignore DRQ here and stop the HSM by |
4042 | * changing hsm_task_state to HSM_ST_ERR and | |
4043 | * let the EH abort the command or reset the device. | |
71601958 AL |
4044 | */ |
4045 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
4046 | printk(KERN_WARNING "ata%d: DRQ=1 with device error, dev_stat 0x%X\n", | |
4047 | ap->id, status); | |
4048 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
4049 | ap->hsm_task_state = HSM_ST_ERR; |
4050 | goto fsm_start; | |
71601958 | 4051 | } |
1da177e4 | 4052 | |
e2cec771 | 4053 | atapi_pio_bytes(qc); |
7fb6ec28 | 4054 | |
e2cec771 AL |
4055 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
4056 | /* bad ireason reported by device */ | |
4057 | goto fsm_start; | |
1da177e4 | 4058 | |
e2cec771 AL |
4059 | } else { |
4060 | /* ATA PIO protocol */ | |
4061 | if (unlikely((status & ATA_DRQ) == 0)) { | |
4062 | /* handle BSY=0, DRQ=0 as error */ | |
4063 | qc->err_mask |= AC_ERR_HSM; | |
4064 | ap->hsm_task_state = HSM_ST_ERR; | |
4065 | goto fsm_start; | |
4066 | } | |
1da177e4 | 4067 | |
eee6c32f AL |
4068 | /* For PIO reads, some devices may ask for |
4069 | * data transfer (DRQ=1) alone with ERR=1. | |
4070 | * We respect DRQ here and transfer one | |
4071 | * block of junk data before changing the | |
4072 | * hsm_task_state to HSM_ST_ERR. | |
4073 | * | |
4074 | * For PIO writes, ERR=1 DRQ=1 doesn't make | |
4075 | * sense since the data block has been | |
4076 | * transferred to the device. | |
71601958 AL |
4077 | */ |
4078 | if (unlikely(status & (ATA_ERR | ATA_DF))) { | |
71601958 AL |
4079 | /* data might be corrputed */ |
4080 | qc->err_mask |= AC_ERR_DEV; | |
eee6c32f AL |
4081 | |
4082 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { | |
4083 | ata_pio_sectors(qc); | |
4084 | ata_altstatus(ap); | |
4085 | status = ata_wait_idle(ap); | |
4086 | } | |
4087 | ||
4088 | /* ata_pio_sectors() might change the | |
4089 | * state to HSM_ST_LAST. so, the state | |
4090 | * is changed after ata_pio_sectors(). | |
4091 | */ | |
4092 | ap->hsm_task_state = HSM_ST_ERR; | |
4093 | goto fsm_start; | |
71601958 AL |
4094 | } |
4095 | ||
e2cec771 AL |
4096 | ata_pio_sectors(qc); |
4097 | ||
4098 | if (ap->hsm_task_state == HSM_ST_LAST && | |
4099 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { | |
4100 | /* all data read */ | |
4101 | ata_altstatus(ap); | |
52a32205 | 4102 | status = ata_wait_idle(ap); |
e2cec771 AL |
4103 | goto fsm_start; |
4104 | } | |
4105 | } | |
4106 | ||
4107 | ata_altstatus(ap); /* flush */ | |
bb5cb290 | 4108 | poll_next = 1; |
1da177e4 LT |
4109 | break; |
4110 | ||
14be71f4 | 4111 | case HSM_ST_LAST: |
6912ccd5 AL |
4112 | if (unlikely(!ata_ok(status))) { |
4113 | qc->err_mask |= __ac_err_mask(status); | |
e2cec771 AL |
4114 | ap->hsm_task_state = HSM_ST_ERR; |
4115 | goto fsm_start; | |
4116 | } | |
4117 | ||
4118 | /* no more data to transfer */ | |
4332a771 AL |
4119 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
4120 | ap->id, qc->dev->devno, status); | |
e2cec771 | 4121 | |
6912ccd5 AL |
4122 | WARN_ON(qc->err_mask); |
4123 | ||
e2cec771 | 4124 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 4125 | |
e2cec771 | 4126 | /* complete taskfile transaction */ |
c17ea20d | 4127 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
4128 | |
4129 | poll_next = 0; | |
1da177e4 LT |
4130 | break; |
4131 | ||
14be71f4 | 4132 | case HSM_ST_ERR: |
e2cec771 AL |
4133 | /* make sure qc->err_mask is available to |
4134 | * know what's wrong and recover | |
4135 | */ | |
4136 | WARN_ON(qc->err_mask == 0); | |
4137 | ||
4138 | ap->hsm_task_state = HSM_ST_IDLE; | |
bb5cb290 | 4139 | |
999bb6f4 | 4140 | /* complete taskfile transaction */ |
c17ea20d | 4141 | ata_hsm_qc_complete(qc, in_wq); |
bb5cb290 AL |
4142 | |
4143 | poll_next = 0; | |
e2cec771 AL |
4144 | break; |
4145 | default: | |
bb5cb290 | 4146 | poll_next = 0; |
6912ccd5 | 4147 | BUG(); |
1da177e4 LT |
4148 | } |
4149 | ||
bb5cb290 | 4150 | return poll_next; |
1da177e4 LT |
4151 | } |
4152 | ||
1da177e4 | 4153 | static void ata_pio_task(void *_data) |
8061f5f0 | 4154 | { |
c91af2c8 TH |
4155 | struct ata_queued_cmd *qc = _data; |
4156 | struct ata_port *ap = qc->ap; | |
8061f5f0 | 4157 | u8 status; |
a1af3734 | 4158 | int poll_next; |
8061f5f0 | 4159 | |
7fb6ec28 | 4160 | fsm_start: |
a1af3734 | 4161 | WARN_ON(ap->hsm_task_state == HSM_ST_IDLE); |
8061f5f0 | 4162 | |
a1af3734 AL |
4163 | /* |
4164 | * This is purely heuristic. This is a fast path. | |
4165 | * Sometimes when we enter, BSY will be cleared in | |
4166 | * a chk-status or two. If not, the drive is probably seeking | |
4167 | * or something. Snooze for a couple msecs, then | |
4168 | * chk-status again. If still busy, queue delayed work. | |
4169 | */ | |
4170 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
4171 | if (status & ATA_BUSY) { | |
4172 | msleep(2); | |
4173 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
4174 | if (status & ATA_BUSY) { | |
31ce6dae | 4175 | ata_port_queue_task(ap, ata_pio_task, qc, ATA_SHORT_PAUSE); |
a1af3734 AL |
4176 | return; |
4177 | } | |
8061f5f0 TH |
4178 | } |
4179 | ||
a1af3734 AL |
4180 | /* move the HSM */ |
4181 | poll_next = ata_hsm_move(ap, qc, status, 1); | |
8061f5f0 | 4182 | |
a1af3734 AL |
4183 | /* another command or interrupt handler |
4184 | * may be running at this point. | |
4185 | */ | |
4186 | if (poll_next) | |
7fb6ec28 | 4187 | goto fsm_start; |
8061f5f0 TH |
4188 | } |
4189 | ||
1da177e4 LT |
4190 | /** |
4191 | * ata_qc_new - Request an available ATA command, for queueing | |
4192 | * @ap: Port associated with device @dev | |
4193 | * @dev: Device from whom we request an available command structure | |
4194 | * | |
4195 | * LOCKING: | |
0cba632b | 4196 | * None. |
1da177e4 LT |
4197 | */ |
4198 | ||
4199 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
4200 | { | |
4201 | struct ata_queued_cmd *qc = NULL; | |
4202 | unsigned int i; | |
4203 | ||
e3180499 TH |
4204 | /* no command while frozen */ |
4205 | if (unlikely(ap->flags & ATA_FLAG_FROZEN)) | |
4206 | return NULL; | |
4207 | ||
2ab7db1f TH |
4208 | /* the last tag is reserved for internal command. */ |
4209 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
6cec4a39 | 4210 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
f69499f4 | 4211 | qc = __ata_qc_from_tag(ap, i); |
1da177e4 LT |
4212 | break; |
4213 | } | |
4214 | ||
4215 | if (qc) | |
4216 | qc->tag = i; | |
4217 | ||
4218 | return qc; | |
4219 | } | |
4220 | ||
4221 | /** | |
4222 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
4223 | * @dev: Device from whom we request an available command structure |
4224 | * | |
4225 | * LOCKING: | |
0cba632b | 4226 | * None. |
1da177e4 LT |
4227 | */ |
4228 | ||
3373efd8 | 4229 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 4230 | { |
3373efd8 | 4231 | struct ata_port *ap = dev->ap; |
1da177e4 LT |
4232 | struct ata_queued_cmd *qc; |
4233 | ||
4234 | qc = ata_qc_new(ap); | |
4235 | if (qc) { | |
1da177e4 LT |
4236 | qc->scsicmd = NULL; |
4237 | qc->ap = ap; | |
4238 | qc->dev = dev; | |
1da177e4 | 4239 | |
2c13b7ce | 4240 | ata_qc_reinit(qc); |
1da177e4 LT |
4241 | } |
4242 | ||
4243 | return qc; | |
4244 | } | |
4245 | ||
1da177e4 LT |
4246 | /** |
4247 | * ata_qc_free - free unused ata_queued_cmd | |
4248 | * @qc: Command to complete | |
4249 | * | |
4250 | * Designed to free unused ata_queued_cmd object | |
4251 | * in case something prevents using it. | |
4252 | * | |
4253 | * LOCKING: | |
0cba632b | 4254 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
4255 | */ |
4256 | void ata_qc_free(struct ata_queued_cmd *qc) | |
4257 | { | |
4ba946e9 TH |
4258 | struct ata_port *ap = qc->ap; |
4259 | unsigned int tag; | |
4260 | ||
a4631474 | 4261 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 4262 | |
4ba946e9 TH |
4263 | qc->flags = 0; |
4264 | tag = qc->tag; | |
4265 | if (likely(ata_tag_valid(tag))) { | |
4ba946e9 | 4266 | qc->tag = ATA_TAG_POISON; |
6cec4a39 | 4267 | clear_bit(tag, &ap->qc_allocated); |
4ba946e9 | 4268 | } |
1da177e4 LT |
4269 | } |
4270 | ||
76014427 | 4271 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 4272 | { |
a4631474 TH |
4273 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
4274 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
4275 | |
4276 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4277 | ata_sg_clean(qc); | |
4278 | ||
7401abf2 TH |
4279 | /* command should be marked inactive atomically with qc completion */ |
4280 | qc->ap->active_tag = ATA_TAG_POISON; | |
4281 | ||
3f3791d3 AL |
4282 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4283 | * from completing the command twice later, before the error handler | |
4284 | * is called. (when rc != 0 and atapi request sense is needed) | |
4285 | */ | |
4286 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
4287 | ||
1da177e4 | 4288 | /* call completion callback */ |
77853bf2 | 4289 | qc->complete_fn(qc); |
1da177e4 LT |
4290 | } |
4291 | ||
f686bcb8 TH |
4292 | /** |
4293 | * ata_qc_complete - Complete an active ATA command | |
4294 | * @qc: Command to complete | |
4295 | * @err_mask: ATA Status register contents | |
4296 | * | |
4297 | * Indicate to the mid and upper layers that an ATA | |
4298 | * command has completed, with either an ok or not-ok status. | |
4299 | * | |
4300 | * LOCKING: | |
4301 | * spin_lock_irqsave(host_set lock) | |
4302 | */ | |
4303 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
4304 | { | |
4305 | struct ata_port *ap = qc->ap; | |
4306 | ||
4307 | /* XXX: New EH and old EH use different mechanisms to | |
4308 | * synchronize EH with regular execution path. | |
4309 | * | |
4310 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
4311 | * Normal execution path is responsible for not accessing a | |
4312 | * failed qc. libata core enforces the rule by returning NULL | |
4313 | * from ata_qc_from_tag() for failed qcs. | |
4314 | * | |
4315 | * Old EH depends on ata_qc_complete() nullifying completion | |
4316 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
4317 | * not synchronize with interrupt handler. Only PIO task is | |
4318 | * taken care of. | |
4319 | */ | |
4320 | if (ap->ops->error_handler) { | |
4321 | WARN_ON(ap->flags & ATA_FLAG_FROZEN); | |
4322 | ||
4323 | if (unlikely(qc->err_mask)) | |
4324 | qc->flags |= ATA_QCFLAG_FAILED; | |
4325 | ||
4326 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
4327 | if (!ata_tag_internal(qc->tag)) { | |
4328 | /* always fill result TF for failed qc */ | |
4329 | ap->ops->tf_read(ap, &qc->result_tf); | |
4330 | ata_qc_schedule_eh(qc); | |
4331 | return; | |
4332 | } | |
4333 | } | |
4334 | ||
4335 | /* read result TF if requested */ | |
4336 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
4337 | ap->ops->tf_read(ap, &qc->result_tf); | |
4338 | ||
4339 | __ata_qc_complete(qc); | |
4340 | } else { | |
4341 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
4342 | return; | |
4343 | ||
4344 | /* read result TF if failed or requested */ | |
4345 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
4346 | ap->ops->tf_read(ap, &qc->result_tf); | |
4347 | ||
4348 | __ata_qc_complete(qc); | |
4349 | } | |
4350 | } | |
4351 | ||
1da177e4 LT |
4352 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) |
4353 | { | |
4354 | struct ata_port *ap = qc->ap; | |
4355 | ||
4356 | switch (qc->tf.protocol) { | |
4357 | case ATA_PROT_DMA: | |
4358 | case ATA_PROT_ATAPI_DMA: | |
4359 | return 1; | |
4360 | ||
4361 | case ATA_PROT_ATAPI: | |
4362 | case ATA_PROT_PIO: | |
1da177e4 LT |
4363 | if (ap->flags & ATA_FLAG_PIO_DMA) |
4364 | return 1; | |
4365 | ||
4366 | /* fall through */ | |
4367 | ||
4368 | default: | |
4369 | return 0; | |
4370 | } | |
4371 | ||
4372 | /* never reached */ | |
4373 | } | |
4374 | ||
4375 | /** | |
4376 | * ata_qc_issue - issue taskfile to device | |
4377 | * @qc: command to issue to device | |
4378 | * | |
4379 | * Prepare an ATA command to submission to device. | |
4380 | * This includes mapping the data into a DMA-able | |
4381 | * area, filling in the S/G table, and finally | |
4382 | * writing the taskfile to hardware, starting the command. | |
4383 | * | |
4384 | * LOCKING: | |
4385 | * spin_lock_irqsave(host_set lock) | |
1da177e4 | 4386 | */ |
8e0e694a | 4387 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
4388 | { |
4389 | struct ata_port *ap = qc->ap; | |
4390 | ||
e4a70e76 TH |
4391 | qc->ap->active_tag = qc->tag; |
4392 | qc->flags |= ATA_QCFLAG_ACTIVE; | |
4393 | ||
1da177e4 LT |
4394 | if (ata_should_dma_map(qc)) { |
4395 | if (qc->flags & ATA_QCFLAG_SG) { | |
4396 | if (ata_sg_setup(qc)) | |
8e436af9 | 4397 | goto sg_err; |
1da177e4 LT |
4398 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
4399 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 4400 | goto sg_err; |
1da177e4 LT |
4401 | } |
4402 | } else { | |
4403 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
4404 | } | |
4405 | ||
4406 | ap->ops->qc_prep(qc); | |
4407 | ||
8e0e694a TH |
4408 | qc->err_mask |= ap->ops->qc_issue(qc); |
4409 | if (unlikely(qc->err_mask)) | |
4410 | goto err; | |
4411 | return; | |
1da177e4 | 4412 | |
8e436af9 TH |
4413 | sg_err: |
4414 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
8e0e694a TH |
4415 | qc->err_mask |= AC_ERR_SYSTEM; |
4416 | err: | |
4417 | ata_qc_complete(qc); | |
1da177e4 LT |
4418 | } |
4419 | ||
4420 | /** | |
4421 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
4422 | * @qc: command to issue to device | |
4423 | * | |
4424 | * Using various libata functions and hooks, this function | |
4425 | * starts an ATA command. ATA commands are grouped into | |
4426 | * classes called "protocols", and issuing each type of protocol | |
4427 | * is slightly different. | |
4428 | * | |
0baab86b EF |
4429 | * May be used as the qc_issue() entry in ata_port_operations. |
4430 | * | |
1da177e4 LT |
4431 | * LOCKING: |
4432 | * spin_lock_irqsave(host_set lock) | |
4433 | * | |
4434 | * RETURNS: | |
9a3d9eb0 | 4435 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
4436 | */ |
4437 | ||
9a3d9eb0 | 4438 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
4439 | { |
4440 | struct ata_port *ap = qc->ap; | |
4441 | ||
e50362ec AL |
4442 | /* Use polling pio if the LLD doesn't handle |
4443 | * interrupt driven pio and atapi CDB interrupt. | |
4444 | */ | |
4445 | if (ap->flags & ATA_FLAG_PIO_POLLING) { | |
4446 | switch (qc->tf.protocol) { | |
4447 | case ATA_PROT_PIO: | |
4448 | case ATA_PROT_ATAPI: | |
4449 | case ATA_PROT_ATAPI_NODATA: | |
4450 | qc->tf.flags |= ATA_TFLAG_POLLING; | |
4451 | break; | |
4452 | case ATA_PROT_ATAPI_DMA: | |
4453 | if (qc->dev->flags & ATA_DFLAG_CDB_INTR) | |
c2bbc551 | 4454 | /* see ata_check_atapi_dma() */ |
e50362ec AL |
4455 | BUG(); |
4456 | break; | |
4457 | default: | |
4458 | break; | |
4459 | } | |
4460 | } | |
4461 | ||
312f7da2 | 4462 | /* select the device */ |
1da177e4 LT |
4463 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
4464 | ||
312f7da2 | 4465 | /* start the command */ |
1da177e4 LT |
4466 | switch (qc->tf.protocol) { |
4467 | case ATA_PROT_NODATA: | |
312f7da2 AL |
4468 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
4469 | ata_qc_set_polling(qc); | |
4470 | ||
e5338254 | 4471 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 AL |
4472 | ap->hsm_task_state = HSM_ST_LAST; |
4473 | ||
4474 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 4475 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
312f7da2 | 4476 | |
1da177e4 LT |
4477 | break; |
4478 | ||
4479 | case ATA_PROT_DMA: | |
587005de | 4480 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 4481 | |
1da177e4 LT |
4482 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
4483 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
4484 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
312f7da2 | 4485 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
4486 | break; |
4487 | ||
312f7da2 AL |
4488 | case ATA_PROT_PIO: |
4489 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
4490 | ata_qc_set_polling(qc); | |
1da177e4 | 4491 | |
e5338254 | 4492 | ata_tf_to_host(ap, &qc->tf); |
312f7da2 | 4493 | |
54f00389 AL |
4494 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
4495 | /* PIO data out protocol */ | |
4496 | ap->hsm_task_state = HSM_ST_FIRST; | |
31ce6dae | 4497 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
4498 | |
4499 | /* always send first data block using | |
e27486db | 4500 | * the ata_pio_task() codepath. |
54f00389 | 4501 | */ |
312f7da2 | 4502 | } else { |
54f00389 AL |
4503 | /* PIO data in protocol */ |
4504 | ap->hsm_task_state = HSM_ST; | |
4505 | ||
4506 | if (qc->tf.flags & ATA_TFLAG_POLLING) | |
31ce6dae | 4507 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
54f00389 AL |
4508 | |
4509 | /* if polling, ata_pio_task() handles the rest. | |
4510 | * otherwise, interrupt handler takes over from here. | |
4511 | */ | |
312f7da2 AL |
4512 | } |
4513 | ||
1da177e4 LT |
4514 | break; |
4515 | ||
1da177e4 | 4516 | case ATA_PROT_ATAPI: |
1da177e4 | 4517 | case ATA_PROT_ATAPI_NODATA: |
312f7da2 AL |
4518 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
4519 | ata_qc_set_polling(qc); | |
4520 | ||
e5338254 | 4521 | ata_tf_to_host(ap, &qc->tf); |
f6ef65e6 | 4522 | |
312f7da2 AL |
4523 | ap->hsm_task_state = HSM_ST_FIRST; |
4524 | ||
4525 | /* send cdb by polling if no cdb interrupt */ | |
4526 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || | |
4527 | (qc->tf.flags & ATA_TFLAG_POLLING)) | |
31ce6dae | 4528 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
4529 | break; |
4530 | ||
4531 | case ATA_PROT_ATAPI_DMA: | |
587005de | 4532 | WARN_ON(qc->tf.flags & ATA_TFLAG_POLLING); |
312f7da2 | 4533 | |
1da177e4 LT |
4534 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
4535 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
312f7da2 AL |
4536 | ap->hsm_task_state = HSM_ST_FIRST; |
4537 | ||
4538 | /* send cdb by polling if no cdb interrupt */ | |
4539 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
31ce6dae | 4540 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
4541 | break; |
4542 | ||
4543 | default: | |
4544 | WARN_ON(1); | |
9a3d9eb0 | 4545 | return AC_ERR_SYSTEM; |
1da177e4 LT |
4546 | } |
4547 | ||
4548 | return 0; | |
4549 | } | |
4550 | ||
1da177e4 LT |
4551 | /** |
4552 | * ata_host_intr - Handle host interrupt for given (port, task) | |
4553 | * @ap: Port on which interrupt arrived (possibly...) | |
4554 | * @qc: Taskfile currently active in engine | |
4555 | * | |
4556 | * Handle host interrupt for given queued command. Currently, | |
4557 | * only DMA interrupts are handled. All other commands are | |
4558 | * handled via polling with interrupts disabled (nIEN bit). | |
4559 | * | |
4560 | * LOCKING: | |
4561 | * spin_lock_irqsave(host_set lock) | |
4562 | * | |
4563 | * RETURNS: | |
4564 | * One if interrupt was handled, zero if not (shared irq). | |
4565 | */ | |
4566 | ||
4567 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
4568 | struct ata_queued_cmd *qc) | |
4569 | { | |
312f7da2 | 4570 | u8 status, host_stat = 0; |
1da177e4 | 4571 | |
312f7da2 AL |
4572 | VPRINTK("ata%u: protocol %d task_state %d\n", |
4573 | ap->id, qc->tf.protocol, ap->hsm_task_state); | |
1da177e4 | 4574 | |
312f7da2 AL |
4575 | /* Check whether we are expecting interrupt in this state */ |
4576 | switch (ap->hsm_task_state) { | |
4577 | case HSM_ST_FIRST: | |
6912ccd5 AL |
4578 | /* Some pre-ATAPI-4 devices assert INTRQ |
4579 | * at this state when ready to receive CDB. | |
4580 | */ | |
1da177e4 | 4581 | |
312f7da2 AL |
4582 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
4583 | * The flag was turned on only for atapi devices. | |
4584 | * No need to check is_atapi_taskfile(&qc->tf) again. | |
4585 | */ | |
4586 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) | |
1da177e4 | 4587 | goto idle_irq; |
1da177e4 | 4588 | break; |
312f7da2 AL |
4589 | case HSM_ST_LAST: |
4590 | if (qc->tf.protocol == ATA_PROT_DMA || | |
4591 | qc->tf.protocol == ATA_PROT_ATAPI_DMA) { | |
4592 | /* check status of DMA engine */ | |
4593 | host_stat = ap->ops->bmdma_status(ap); | |
4594 | VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); | |
4595 | ||
4596 | /* if it's not our irq... */ | |
4597 | if (!(host_stat & ATA_DMA_INTR)) | |
4598 | goto idle_irq; | |
4599 | ||
4600 | /* before we do anything else, clear DMA-Start bit */ | |
4601 | ap->ops->bmdma_stop(qc); | |
a4f16610 AL |
4602 | |
4603 | if (unlikely(host_stat & ATA_DMA_ERR)) { | |
4604 | /* error when transfering data to/from memory */ | |
4605 | qc->err_mask |= AC_ERR_HOST_BUS; | |
4606 | ap->hsm_task_state = HSM_ST_ERR; | |
4607 | } | |
312f7da2 AL |
4608 | } |
4609 | break; | |
4610 | case HSM_ST: | |
4611 | break; | |
1da177e4 LT |
4612 | default: |
4613 | goto idle_irq; | |
4614 | } | |
4615 | ||
312f7da2 AL |
4616 | /* check altstatus */ |
4617 | status = ata_altstatus(ap); | |
4618 | if (status & ATA_BUSY) | |
4619 | goto idle_irq; | |
1da177e4 | 4620 | |
312f7da2 AL |
4621 | /* check main status, clearing INTRQ */ |
4622 | status = ata_chk_status(ap); | |
4623 | if (unlikely(status & ATA_BUSY)) | |
4624 | goto idle_irq; | |
1da177e4 | 4625 | |
312f7da2 AL |
4626 | /* ack bmdma irq events */ |
4627 | ap->ops->irq_clear(ap); | |
1da177e4 | 4628 | |
bb5cb290 | 4629 | ata_hsm_move(ap, qc, status, 0); |
1da177e4 LT |
4630 | return 1; /* irq handled */ |
4631 | ||
4632 | idle_irq: | |
4633 | ap->stats.idle_irq++; | |
4634 | ||
4635 | #ifdef ATA_IRQ_TRAP | |
4636 | if ((ap->stats.idle_irq % 1000) == 0) { | |
1da177e4 | 4637 | ata_irq_ack(ap, 0); /* debug trap */ |
f15a1daf | 4638 | ata_port_printk(ap, KERN_WARNING, "irq trap\n"); |
23cfce89 | 4639 | return 1; |
1da177e4 LT |
4640 | } |
4641 | #endif | |
4642 | return 0; /* irq not handled */ | |
4643 | } | |
4644 | ||
4645 | /** | |
4646 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b JG |
4647 | * @irq: irq line (unused) |
4648 | * @dev_instance: pointer to our ata_host_set information structure | |
1da177e4 LT |
4649 | * @regs: unused |
4650 | * | |
0cba632b JG |
4651 | * Default interrupt handler for PCI IDE devices. Calls |
4652 | * ata_host_intr() for each port that is not disabled. | |
4653 | * | |
1da177e4 | 4654 | * LOCKING: |
0cba632b | 4655 | * Obtains host_set lock during operation. |
1da177e4 LT |
4656 | * |
4657 | * RETURNS: | |
0cba632b | 4658 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
4659 | */ |
4660 | ||
4661 | irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) | |
4662 | { | |
4663 | struct ata_host_set *host_set = dev_instance; | |
4664 | unsigned int i; | |
4665 | unsigned int handled = 0; | |
4666 | unsigned long flags; | |
4667 | ||
4668 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
4669 | spin_lock_irqsave(&host_set->lock, flags); | |
4670 | ||
4671 | for (i = 0; i < host_set->n_ports; i++) { | |
4672 | struct ata_port *ap; | |
4673 | ||
4674 | ap = host_set->ports[i]; | |
c1389503 | 4675 | if (ap && |
029f5468 | 4676 | !(ap->flags & ATA_FLAG_DISABLED)) { |
1da177e4 LT |
4677 | struct ata_queued_cmd *qc; |
4678 | ||
4679 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
312f7da2 | 4680 | if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)) && |
21b1ed74 | 4681 | (qc->flags & ATA_QCFLAG_ACTIVE)) |
1da177e4 LT |
4682 | handled |= ata_host_intr(ap, qc); |
4683 | } | |
4684 | } | |
4685 | ||
4686 | spin_unlock_irqrestore(&host_set->lock, flags); | |
4687 | ||
4688 | return IRQ_RETVAL(handled); | |
4689 | } | |
4690 | ||
34bf2170 TH |
4691 | /** |
4692 | * sata_scr_valid - test whether SCRs are accessible | |
4693 | * @ap: ATA port to test SCR accessibility for | |
4694 | * | |
4695 | * Test whether SCRs are accessible for @ap. | |
4696 | * | |
4697 | * LOCKING: | |
4698 | * None. | |
4699 | * | |
4700 | * RETURNS: | |
4701 | * 1 if SCRs are accessible, 0 otherwise. | |
4702 | */ | |
4703 | int sata_scr_valid(struct ata_port *ap) | |
4704 | { | |
4705 | return ap->cbl == ATA_CBL_SATA && ap->ops->scr_read; | |
4706 | } | |
4707 | ||
4708 | /** | |
4709 | * sata_scr_read - read SCR register of the specified port | |
4710 | * @ap: ATA port to read SCR for | |
4711 | * @reg: SCR to read | |
4712 | * @val: Place to store read value | |
4713 | * | |
4714 | * Read SCR register @reg of @ap into *@val. This function is | |
4715 | * guaranteed to succeed if the cable type of the port is SATA | |
4716 | * and the port implements ->scr_read. | |
4717 | * | |
4718 | * LOCKING: | |
4719 | * None. | |
4720 | * | |
4721 | * RETURNS: | |
4722 | * 0 on success, negative errno on failure. | |
4723 | */ | |
4724 | int sata_scr_read(struct ata_port *ap, int reg, u32 *val) | |
4725 | { | |
4726 | if (sata_scr_valid(ap)) { | |
4727 | *val = ap->ops->scr_read(ap, reg); | |
4728 | return 0; | |
4729 | } | |
4730 | return -EOPNOTSUPP; | |
4731 | } | |
4732 | ||
4733 | /** | |
4734 | * sata_scr_write - write SCR register of the specified port | |
4735 | * @ap: ATA port to write SCR for | |
4736 | * @reg: SCR to write | |
4737 | * @val: value to write | |
4738 | * | |
4739 | * Write @val to SCR register @reg of @ap. This function is | |
4740 | * guaranteed to succeed if the cable type of the port is SATA | |
4741 | * and the port implements ->scr_read. | |
4742 | * | |
4743 | * LOCKING: | |
4744 | * None. | |
4745 | * | |
4746 | * RETURNS: | |
4747 | * 0 on success, negative errno on failure. | |
4748 | */ | |
4749 | int sata_scr_write(struct ata_port *ap, int reg, u32 val) | |
4750 | { | |
4751 | if (sata_scr_valid(ap)) { | |
4752 | ap->ops->scr_write(ap, reg, val); | |
4753 | return 0; | |
4754 | } | |
4755 | return -EOPNOTSUPP; | |
4756 | } | |
4757 | ||
4758 | /** | |
4759 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
4760 | * @ap: ATA port to write SCR for | |
4761 | * @reg: SCR to write | |
4762 | * @val: value to write | |
4763 | * | |
4764 | * This function is identical to sata_scr_write() except that this | |
4765 | * function performs flush after writing to the register. | |
4766 | * | |
4767 | * LOCKING: | |
4768 | * None. | |
4769 | * | |
4770 | * RETURNS: | |
4771 | * 0 on success, negative errno on failure. | |
4772 | */ | |
4773 | int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val) | |
4774 | { | |
4775 | if (sata_scr_valid(ap)) { | |
4776 | ap->ops->scr_write(ap, reg, val); | |
4777 | ap->ops->scr_read(ap, reg); | |
4778 | return 0; | |
4779 | } | |
4780 | return -EOPNOTSUPP; | |
4781 | } | |
4782 | ||
4783 | /** | |
4784 | * ata_port_online - test whether the given port is online | |
4785 | * @ap: ATA port to test | |
4786 | * | |
4787 | * Test whether @ap is online. Note that this function returns 0 | |
4788 | * if online status of @ap cannot be obtained, so | |
4789 | * ata_port_online(ap) != !ata_port_offline(ap). | |
4790 | * | |
4791 | * LOCKING: | |
4792 | * None. | |
4793 | * | |
4794 | * RETURNS: | |
4795 | * 1 if the port online status is available and online. | |
4796 | */ | |
4797 | int ata_port_online(struct ata_port *ap) | |
4798 | { | |
4799 | u32 sstatus; | |
4800 | ||
4801 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) == 0x3) | |
4802 | return 1; | |
4803 | return 0; | |
4804 | } | |
4805 | ||
4806 | /** | |
4807 | * ata_port_offline - test whether the given port is offline | |
4808 | * @ap: ATA port to test | |
4809 | * | |
4810 | * Test whether @ap is offline. Note that this function returns | |
4811 | * 0 if offline status of @ap cannot be obtained, so | |
4812 | * ata_port_online(ap) != !ata_port_offline(ap). | |
4813 | * | |
4814 | * LOCKING: | |
4815 | * None. | |
4816 | * | |
4817 | * RETURNS: | |
4818 | * 1 if the port offline status is available and offline. | |
4819 | */ | |
4820 | int ata_port_offline(struct ata_port *ap) | |
4821 | { | |
4822 | u32 sstatus; | |
4823 | ||
4824 | if (!sata_scr_read(ap, SCR_STATUS, &sstatus) && (sstatus & 0xf) != 0x3) | |
4825 | return 1; | |
4826 | return 0; | |
4827 | } | |
0baab86b | 4828 | |
9b847548 JA |
4829 | /* |
4830 | * Execute a 'simple' command, that only consists of the opcode 'cmd' itself, | |
4831 | * without filling any other registers | |
4832 | */ | |
3373efd8 | 4833 | static int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
9b847548 JA |
4834 | { |
4835 | struct ata_taskfile tf; | |
4836 | int err; | |
4837 | ||
3373efd8 | 4838 | ata_tf_init(dev, &tf); |
9b847548 JA |
4839 | |
4840 | tf.command = cmd; | |
4841 | tf.flags |= ATA_TFLAG_DEVICE; | |
4842 | tf.protocol = ATA_PROT_NODATA; | |
4843 | ||
3373efd8 | 4844 | err = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0); |
9b847548 | 4845 | if (err) |
f15a1daf TH |
4846 | ata_dev_printk(dev, KERN_ERR, "%s: ata command failed: %d\n", |
4847 | __FUNCTION__, err); | |
9b847548 JA |
4848 | |
4849 | return err; | |
4850 | } | |
4851 | ||
3373efd8 | 4852 | static int ata_flush_cache(struct ata_device *dev) |
9b847548 JA |
4853 | { |
4854 | u8 cmd; | |
4855 | ||
4856 | if (!ata_try_flush_cache(dev)) | |
4857 | return 0; | |
4858 | ||
4859 | if (ata_id_has_flush_ext(dev->id)) | |
4860 | cmd = ATA_CMD_FLUSH_EXT; | |
4861 | else | |
4862 | cmd = ATA_CMD_FLUSH; | |
4863 | ||
3373efd8 | 4864 | return ata_do_simple_cmd(dev, cmd); |
9b847548 JA |
4865 | } |
4866 | ||
3373efd8 | 4867 | static int ata_standby_drive(struct ata_device *dev) |
9b847548 | 4868 | { |
3373efd8 | 4869 | return ata_do_simple_cmd(dev, ATA_CMD_STANDBYNOW1); |
9b847548 JA |
4870 | } |
4871 | ||
3373efd8 | 4872 | static int ata_start_drive(struct ata_device *dev) |
9b847548 | 4873 | { |
3373efd8 | 4874 | return ata_do_simple_cmd(dev, ATA_CMD_IDLEIMMEDIATE); |
9b847548 JA |
4875 | } |
4876 | ||
4877 | /** | |
4878 | * ata_device_resume - wakeup a previously suspended devices | |
c893a3ae | 4879 | * @dev: the device to resume |
9b847548 JA |
4880 | * |
4881 | * Kick the drive back into action, by sending it an idle immediate | |
4882 | * command and making sure its transfer mode matches between drive | |
4883 | * and host. | |
4884 | * | |
4885 | */ | |
3373efd8 | 4886 | int ata_device_resume(struct ata_device *dev) |
9b847548 | 4887 | { |
3373efd8 TH |
4888 | struct ata_port *ap = dev->ap; |
4889 | ||
9b847548 | 4890 | if (ap->flags & ATA_FLAG_SUSPENDED) { |
e82cbdb9 | 4891 | struct ata_device *failed_dev; |
9b847548 | 4892 | ap->flags &= ~ATA_FLAG_SUSPENDED; |
e82cbdb9 | 4893 | while (ata_set_mode(ap, &failed_dev)) |
3373efd8 | 4894 | ata_dev_disable(failed_dev); |
9b847548 | 4895 | } |
e1211e3f | 4896 | if (!ata_dev_enabled(dev)) |
9b847548 JA |
4897 | return 0; |
4898 | if (dev->class == ATA_DEV_ATA) | |
3373efd8 | 4899 | ata_start_drive(dev); |
9b847548 JA |
4900 | |
4901 | return 0; | |
4902 | } | |
4903 | ||
4904 | /** | |
4905 | * ata_device_suspend - prepare a device for suspend | |
c893a3ae | 4906 | * @dev: the device to suspend |
9b847548 JA |
4907 | * |
4908 | * Flush the cache on the drive, if appropriate, then issue a | |
4909 | * standbynow command. | |
9b847548 | 4910 | */ |
3373efd8 | 4911 | int ata_device_suspend(struct ata_device *dev, pm_message_t state) |
9b847548 | 4912 | { |
3373efd8 TH |
4913 | struct ata_port *ap = dev->ap; |
4914 | ||
e1211e3f | 4915 | if (!ata_dev_enabled(dev)) |
9b847548 JA |
4916 | return 0; |
4917 | if (dev->class == ATA_DEV_ATA) | |
3373efd8 | 4918 | ata_flush_cache(dev); |
9b847548 | 4919 | |
082776e4 | 4920 | if (state.event != PM_EVENT_FREEZE) |
3373efd8 | 4921 | ata_standby_drive(dev); |
9b847548 JA |
4922 | ap->flags |= ATA_FLAG_SUSPENDED; |
4923 | return 0; | |
4924 | } | |
4925 | ||
c893a3ae RD |
4926 | /** |
4927 | * ata_port_start - Set port up for dma. | |
4928 | * @ap: Port to initialize | |
4929 | * | |
4930 | * Called just after data structures for each port are | |
4931 | * initialized. Allocates space for PRD table. | |
4932 | * | |
4933 | * May be used as the port_start() entry in ata_port_operations. | |
4934 | * | |
4935 | * LOCKING: | |
4936 | * Inherited from caller. | |
4937 | */ | |
4938 | ||
1da177e4 LT |
4939 | int ata_port_start (struct ata_port *ap) |
4940 | { | |
2f1f610b | 4941 | struct device *dev = ap->dev; |
6037d6bb | 4942 | int rc; |
1da177e4 LT |
4943 | |
4944 | ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); | |
4945 | if (!ap->prd) | |
4946 | return -ENOMEM; | |
4947 | ||
6037d6bb JG |
4948 | rc = ata_pad_alloc(ap, dev); |
4949 | if (rc) { | |
cedc9a47 | 4950 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); |
6037d6bb | 4951 | return rc; |
cedc9a47 JG |
4952 | } |
4953 | ||
1da177e4 LT |
4954 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma); |
4955 | ||
4956 | return 0; | |
4957 | } | |
4958 | ||
0baab86b EF |
4959 | |
4960 | /** | |
4961 | * ata_port_stop - Undo ata_port_start() | |
4962 | * @ap: Port to shut down | |
4963 | * | |
4964 | * Frees the PRD table. | |
4965 | * | |
4966 | * May be used as the port_stop() entry in ata_port_operations. | |
4967 | * | |
4968 | * LOCKING: | |
6f0ef4fa | 4969 | * Inherited from caller. |
0baab86b EF |
4970 | */ |
4971 | ||
1da177e4 LT |
4972 | void ata_port_stop (struct ata_port *ap) |
4973 | { | |
2f1f610b | 4974 | struct device *dev = ap->dev; |
1da177e4 LT |
4975 | |
4976 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); | |
6037d6bb | 4977 | ata_pad_free(ap, dev); |
1da177e4 LT |
4978 | } |
4979 | ||
aa8f0dc6 JG |
4980 | void ata_host_stop (struct ata_host_set *host_set) |
4981 | { | |
4982 | if (host_set->mmio_base) | |
4983 | iounmap(host_set->mmio_base); | |
4984 | } | |
4985 | ||
4986 | ||
1da177e4 LT |
4987 | /** |
4988 | * ata_host_remove - Unregister SCSI host structure with upper layers | |
4989 | * @ap: Port to unregister | |
4990 | * @do_unregister: 1 if we fully unregister, 0 to just stop the port | |
4991 | * | |
4992 | * LOCKING: | |
6f0ef4fa | 4993 | * Inherited from caller. |
1da177e4 LT |
4994 | */ |
4995 | ||
4996 | static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) | |
4997 | { | |
4998 | struct Scsi_Host *sh = ap->host; | |
4999 | ||
5000 | DPRINTK("ENTER\n"); | |
5001 | ||
5002 | if (do_unregister) | |
5003 | scsi_remove_host(sh); | |
5004 | ||
5005 | ap->ops->port_stop(ap); | |
5006 | } | |
5007 | ||
5008 | /** | |
5009 | * ata_host_init - Initialize an ata_port structure | |
5010 | * @ap: Structure to initialize | |
5011 | * @host: associated SCSI mid-layer structure | |
5012 | * @host_set: Collection of hosts to which @ap belongs | |
5013 | * @ent: Probe information provided by low-level driver | |
5014 | * @port_no: Port number associated with this ata_port | |
5015 | * | |
0cba632b JG |
5016 | * Initialize a new ata_port structure, and its associated |
5017 | * scsi_host. | |
5018 | * | |
1da177e4 | 5019 | * LOCKING: |
0cba632b | 5020 | * Inherited from caller. |
1da177e4 LT |
5021 | */ |
5022 | ||
5023 | static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, | |
5024 | struct ata_host_set *host_set, | |
057ace5e | 5025 | const struct ata_probe_ent *ent, unsigned int port_no) |
1da177e4 LT |
5026 | { |
5027 | unsigned int i; | |
5028 | ||
5029 | host->max_id = 16; | |
5030 | host->max_lun = 1; | |
5031 | host->max_channel = 1; | |
5032 | host->unique_id = ata_unique_id++; | |
5033 | host->max_cmd_len = 12; | |
12413197 | 5034 | |
198e0fed | 5035 | ap->flags = ATA_FLAG_DISABLED; |
1da177e4 LT |
5036 | ap->id = host->unique_id; |
5037 | ap->host = host; | |
5038 | ap->ctl = ATA_DEVCTL_OBS; | |
5039 | ap->host_set = host_set; | |
2f1f610b | 5040 | ap->dev = ent->dev; |
1da177e4 LT |
5041 | ap->port_no = port_no; |
5042 | ap->hard_port_no = | |
5043 | ent->legacy_mode ? ent->hard_port_no : port_no; | |
5044 | ap->pio_mask = ent->pio_mask; | |
5045 | ap->mwdma_mask = ent->mwdma_mask; | |
5046 | ap->udma_mask = ent->udma_mask; | |
5047 | ap->flags |= ent->host_flags; | |
5048 | ap->ops = ent->port_ops; | |
1c3fae4d | 5049 | ap->sata_spd_limit = UINT_MAX; |
1da177e4 LT |
5050 | ap->active_tag = ATA_TAG_POISON; |
5051 | ap->last_ctl = 0xFF; | |
5052 | ||
86e45b6b | 5053 | INIT_WORK(&ap->port_task, NULL, NULL); |
a72ec4ce | 5054 | INIT_LIST_HEAD(&ap->eh_done_q); |
1da177e4 | 5055 | |
838df628 TH |
5056 | /* set cable type */ |
5057 | ap->cbl = ATA_CBL_NONE; | |
5058 | if (ap->flags & ATA_FLAG_SATA) | |
5059 | ap->cbl = ATA_CBL_SATA; | |
5060 | ||
acf356b1 TH |
5061 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
5062 | struct ata_device *dev = &ap->device[i]; | |
38d87234 | 5063 | dev->ap = ap; |
acf356b1 TH |
5064 | dev->devno = i; |
5065 | dev->pio_mask = UINT_MAX; | |
5066 | dev->mwdma_mask = UINT_MAX; | |
5067 | dev->udma_mask = UINT_MAX; | |
5068 | } | |
1da177e4 LT |
5069 | |
5070 | #ifdef ATA_IRQ_TRAP | |
5071 | ap->stats.unhandled_irq = 1; | |
5072 | ap->stats.idle_irq = 1; | |
5073 | #endif | |
5074 | ||
5075 | memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); | |
5076 | } | |
5077 | ||
5078 | /** | |
5079 | * ata_host_add - Attach low-level ATA driver to system | |
5080 | * @ent: Information provided by low-level driver | |
5081 | * @host_set: Collections of ports to which we add | |
5082 | * @port_no: Port number associated with this host | |
5083 | * | |
0cba632b JG |
5084 | * Attach low-level ATA driver to system. |
5085 | * | |
1da177e4 | 5086 | * LOCKING: |
0cba632b | 5087 | * PCI/etc. bus probe sem. |
1da177e4 LT |
5088 | * |
5089 | * RETURNS: | |
0cba632b | 5090 | * New ata_port on success, for NULL on error. |
1da177e4 LT |
5091 | */ |
5092 | ||
057ace5e | 5093 | static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, |
1da177e4 LT |
5094 | struct ata_host_set *host_set, |
5095 | unsigned int port_no) | |
5096 | { | |
5097 | struct Scsi_Host *host; | |
5098 | struct ata_port *ap; | |
5099 | int rc; | |
5100 | ||
5101 | DPRINTK("ENTER\n"); | |
aec5c3c1 TH |
5102 | |
5103 | if (!ent->port_ops->probe_reset && | |
5104 | !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) { | |
5105 | printk(KERN_ERR "ata%u: no reset mechanism available\n", | |
5106 | port_no); | |
5107 | return NULL; | |
5108 | } | |
5109 | ||
1da177e4 LT |
5110 | host = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); |
5111 | if (!host) | |
5112 | return NULL; | |
5113 | ||
30afc84c TH |
5114 | host->transportt = &ata_scsi_transport_template; |
5115 | ||
35bb94b1 | 5116 | ap = ata_shost_to_port(host); |
1da177e4 LT |
5117 | |
5118 | ata_host_init(ap, host, host_set, ent, port_no); | |
5119 | ||
5120 | rc = ap->ops->port_start(ap); | |
5121 | if (rc) | |
5122 | goto err_out; | |
5123 | ||
5124 | return ap; | |
5125 | ||
5126 | err_out: | |
5127 | scsi_host_put(host); | |
5128 | return NULL; | |
5129 | } | |
5130 | ||
5131 | /** | |
0cba632b JG |
5132 | * ata_device_add - Register hardware device with ATA and SCSI layers |
5133 | * @ent: Probe information describing hardware device to be registered | |
5134 | * | |
5135 | * This function processes the information provided in the probe | |
5136 | * information struct @ent, allocates the necessary ATA and SCSI | |
5137 | * host information structures, initializes them, and registers | |
5138 | * everything with requisite kernel subsystems. | |
5139 | * | |
5140 | * This function requests irqs, probes the ATA bus, and probes | |
5141 | * the SCSI bus. | |
1da177e4 LT |
5142 | * |
5143 | * LOCKING: | |
0cba632b | 5144 | * PCI/etc. bus probe sem. |
1da177e4 LT |
5145 | * |
5146 | * RETURNS: | |
0cba632b | 5147 | * Number of ports registered. Zero on error (no ports registered). |
1da177e4 LT |
5148 | */ |
5149 | ||
057ace5e | 5150 | int ata_device_add(const struct ata_probe_ent *ent) |
1da177e4 LT |
5151 | { |
5152 | unsigned int count = 0, i; | |
5153 | struct device *dev = ent->dev; | |
5154 | struct ata_host_set *host_set; | |
5155 | ||
5156 | DPRINTK("ENTER\n"); | |
5157 | /* alloc a container for our list of ATA ports (buses) */ | |
57f3bda8 | 5158 | host_set = kzalloc(sizeof(struct ata_host_set) + |
1da177e4 LT |
5159 | (ent->n_ports * sizeof(void *)), GFP_KERNEL); |
5160 | if (!host_set) | |
5161 | return 0; | |
1da177e4 LT |
5162 | spin_lock_init(&host_set->lock); |
5163 | ||
5164 | host_set->dev = dev; | |
5165 | host_set->n_ports = ent->n_ports; | |
5166 | host_set->irq = ent->irq; | |
5167 | host_set->mmio_base = ent->mmio_base; | |
5168 | host_set->private_data = ent->private_data; | |
5169 | host_set->ops = ent->port_ops; | |
5444a6f4 | 5170 | host_set->flags = ent->host_set_flags; |
1da177e4 LT |
5171 | |
5172 | /* register each port bound to this device */ | |
5173 | for (i = 0; i < ent->n_ports; i++) { | |
5174 | struct ata_port *ap; | |
5175 | unsigned long xfer_mode_mask; | |
5176 | ||
5177 | ap = ata_host_add(ent, host_set, i); | |
5178 | if (!ap) | |
5179 | goto err_out; | |
5180 | ||
5181 | host_set->ports[i] = ap; | |
5182 | xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | | |
5183 | (ap->mwdma_mask << ATA_SHIFT_MWDMA) | | |
5184 | (ap->pio_mask << ATA_SHIFT_PIO); | |
5185 | ||
5186 | /* print per-port info to dmesg */ | |
f15a1daf TH |
5187 | ata_port_printk(ap, KERN_INFO, "%cATA max %s cmd 0x%lX " |
5188 | "ctl 0x%lX bmdma 0x%lX irq %lu\n", | |
5189 | ap->flags & ATA_FLAG_SATA ? 'S' : 'P', | |
5190 | ata_mode_string(xfer_mode_mask), | |
5191 | ap->ioaddr.cmd_addr, | |
5192 | ap->ioaddr.ctl_addr, | |
5193 | ap->ioaddr.bmdma_addr, | |
5194 | ent->irq); | |
1da177e4 LT |
5195 | |
5196 | ata_chk_status(ap); | |
5197 | host_set->ops->irq_clear(ap); | |
e3180499 | 5198 | ata_eh_freeze_port(ap); /* freeze port before requesting IRQ */ |
1da177e4 LT |
5199 | count++; |
5200 | } | |
5201 | ||
57f3bda8 RD |
5202 | if (!count) |
5203 | goto err_free_ret; | |
1da177e4 LT |
5204 | |
5205 | /* obtain irq, that is shared between channels */ | |
5206 | if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags, | |
5207 | DRV_NAME, host_set)) | |
5208 | goto err_out; | |
5209 | ||
5210 | /* perform each probe synchronously */ | |
5211 | DPRINTK("probe begin\n"); | |
5212 | for (i = 0; i < count; i++) { | |
5213 | struct ata_port *ap; | |
5214 | int rc; | |
5215 | ||
5216 | ap = host_set->ports[i]; | |
5217 | ||
c893a3ae | 5218 | DPRINTK("ata%u: bus probe begin\n", ap->id); |
1da177e4 | 5219 | rc = ata_bus_probe(ap); |
c893a3ae | 5220 | DPRINTK("ata%u: bus probe end\n", ap->id); |
1da177e4 LT |
5221 | |
5222 | if (rc) { | |
5223 | /* FIXME: do something useful here? | |
5224 | * Current libata behavior will | |
5225 | * tear down everything when | |
5226 | * the module is removed | |
5227 | * or the h/w is unplugged. | |
5228 | */ | |
5229 | } | |
5230 | ||
5231 | rc = scsi_add_host(ap->host, dev); | |
5232 | if (rc) { | |
f15a1daf | 5233 | ata_port_printk(ap, KERN_ERR, "scsi_add_host failed\n"); |
1da177e4 LT |
5234 | /* FIXME: do something useful here */ |
5235 | /* FIXME: handle unconditional calls to | |
5236 | * scsi_scan_host and ata_host_remove, below, | |
5237 | * at the very least | |
5238 | */ | |
5239 | } | |
5240 | } | |
5241 | ||
5242 | /* probes are done, now scan each port's disk(s) */ | |
c893a3ae | 5243 | DPRINTK("host probe begin\n"); |
1da177e4 LT |
5244 | for (i = 0; i < count; i++) { |
5245 | struct ata_port *ap = host_set->ports[i]; | |
5246 | ||
644dd0cc | 5247 | ata_scsi_scan_host(ap); |
1da177e4 LT |
5248 | } |
5249 | ||
5250 | dev_set_drvdata(dev, host_set); | |
5251 | ||
5252 | VPRINTK("EXIT, returning %u\n", ent->n_ports); | |
5253 | return ent->n_ports; /* success */ | |
5254 | ||
5255 | err_out: | |
5256 | for (i = 0; i < count; i++) { | |
5257 | ata_host_remove(host_set->ports[i], 1); | |
5258 | scsi_host_put(host_set->ports[i]->host); | |
5259 | } | |
57f3bda8 | 5260 | err_free_ret: |
1da177e4 LT |
5261 | kfree(host_set); |
5262 | VPRINTK("EXIT, returning 0\n"); | |
5263 | return 0; | |
5264 | } | |
5265 | ||
17b14451 AC |
5266 | /** |
5267 | * ata_host_set_remove - PCI layer callback for device removal | |
5268 | * @host_set: ATA host set that was removed | |
5269 | * | |
2e9edbf8 | 5270 | * Unregister all objects associated with this host set. Free those |
17b14451 AC |
5271 | * objects. |
5272 | * | |
5273 | * LOCKING: | |
5274 | * Inherited from calling layer (may sleep). | |
5275 | */ | |
5276 | ||
17b14451 AC |
5277 | void ata_host_set_remove(struct ata_host_set *host_set) |
5278 | { | |
5279 | struct ata_port *ap; | |
5280 | unsigned int i; | |
5281 | ||
5282 | for (i = 0; i < host_set->n_ports; i++) { | |
5283 | ap = host_set->ports[i]; | |
5284 | scsi_remove_host(ap->host); | |
5285 | } | |
5286 | ||
5287 | free_irq(host_set->irq, host_set); | |
5288 | ||
5289 | for (i = 0; i < host_set->n_ports; i++) { | |
5290 | ap = host_set->ports[i]; | |
5291 | ||
5292 | ata_scsi_release(ap->host); | |
5293 | ||
5294 | if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) { | |
5295 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
5296 | ||
5297 | if (ioaddr->cmd_addr == 0x1f0) | |
5298 | release_region(0x1f0, 8); | |
5299 | else if (ioaddr->cmd_addr == 0x170) | |
5300 | release_region(0x170, 8); | |
5301 | } | |
5302 | ||
5303 | scsi_host_put(ap->host); | |
5304 | } | |
5305 | ||
5306 | if (host_set->ops->host_stop) | |
5307 | host_set->ops->host_stop(host_set); | |
5308 | ||
5309 | kfree(host_set); | |
5310 | } | |
5311 | ||
1da177e4 LT |
5312 | /** |
5313 | * ata_scsi_release - SCSI layer callback hook for host unload | |
5314 | * @host: libata host to be unloaded | |
5315 | * | |
5316 | * Performs all duties necessary to shut down a libata port... | |
5317 | * Kill port kthread, disable port, and release resources. | |
5318 | * | |
5319 | * LOCKING: | |
5320 | * Inherited from SCSI layer. | |
5321 | * | |
5322 | * RETURNS: | |
5323 | * One. | |
5324 | */ | |
5325 | ||
5326 | int ata_scsi_release(struct Scsi_Host *host) | |
5327 | { | |
35bb94b1 | 5328 | struct ata_port *ap = ata_shost_to_port(host); |
1da177e4 LT |
5329 | |
5330 | DPRINTK("ENTER\n"); | |
5331 | ||
5332 | ap->ops->port_disable(ap); | |
5333 | ata_host_remove(ap, 0); | |
5334 | ||
5335 | DPRINTK("EXIT\n"); | |
5336 | return 1; | |
5337 | } | |
5338 | ||
5339 | /** | |
5340 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
5341 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
5342 | * |
5343 | * Utility function which initializes data_addr, error_addr, | |
5344 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
5345 | * device_addr, status_addr, and command_addr to standard offsets | |
5346 | * relative to cmd_addr. | |
5347 | * | |
5348 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 5349 | */ |
0baab86b | 5350 | |
1da177e4 LT |
5351 | void ata_std_ports(struct ata_ioports *ioaddr) |
5352 | { | |
5353 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
5354 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
5355 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
5356 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
5357 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
5358 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
5359 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
5360 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
5361 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
5362 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
5363 | } | |
5364 | ||
0baab86b | 5365 | |
374b1873 JG |
5366 | #ifdef CONFIG_PCI |
5367 | ||
5368 | void ata_pci_host_stop (struct ata_host_set *host_set) | |
5369 | { | |
5370 | struct pci_dev *pdev = to_pci_dev(host_set->dev); | |
5371 | ||
5372 | pci_iounmap(pdev, host_set->mmio_base); | |
5373 | } | |
5374 | ||
1da177e4 LT |
5375 | /** |
5376 | * ata_pci_remove_one - PCI layer callback for device removal | |
5377 | * @pdev: PCI device that was removed | |
5378 | * | |
5379 | * PCI layer indicates to libata via this hook that | |
6f0ef4fa | 5380 | * hot-unplug or module unload event has occurred. |
1da177e4 LT |
5381 | * Handle this by unregistering all objects associated |
5382 | * with this PCI device. Free those objects. Then finally | |
5383 | * release PCI resources and disable device. | |
5384 | * | |
5385 | * LOCKING: | |
5386 | * Inherited from PCI layer (may sleep). | |
5387 | */ | |
5388 | ||
5389 | void ata_pci_remove_one (struct pci_dev *pdev) | |
5390 | { | |
5391 | struct device *dev = pci_dev_to_dev(pdev); | |
5392 | struct ata_host_set *host_set = dev_get_drvdata(dev); | |
1da177e4 | 5393 | |
17b14451 | 5394 | ata_host_set_remove(host_set); |
1da177e4 LT |
5395 | pci_release_regions(pdev); |
5396 | pci_disable_device(pdev); | |
5397 | dev_set_drvdata(dev, NULL); | |
5398 | } | |
5399 | ||
5400 | /* move to PCI subsystem */ | |
057ace5e | 5401 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
5402 | { |
5403 | unsigned long tmp = 0; | |
5404 | ||
5405 | switch (bits->width) { | |
5406 | case 1: { | |
5407 | u8 tmp8 = 0; | |
5408 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
5409 | tmp = tmp8; | |
5410 | break; | |
5411 | } | |
5412 | case 2: { | |
5413 | u16 tmp16 = 0; | |
5414 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
5415 | tmp = tmp16; | |
5416 | break; | |
5417 | } | |
5418 | case 4: { | |
5419 | u32 tmp32 = 0; | |
5420 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
5421 | tmp = tmp32; | |
5422 | break; | |
5423 | } | |
5424 | ||
5425 | default: | |
5426 | return -EINVAL; | |
5427 | } | |
5428 | ||
5429 | tmp &= bits->mask; | |
5430 | ||
5431 | return (tmp == bits->val) ? 1 : 0; | |
5432 | } | |
9b847548 JA |
5433 | |
5434 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state) | |
5435 | { | |
5436 | pci_save_state(pdev); | |
5437 | pci_disable_device(pdev); | |
5438 | pci_set_power_state(pdev, PCI_D3hot); | |
5439 | return 0; | |
5440 | } | |
5441 | ||
5442 | int ata_pci_device_resume(struct pci_dev *pdev) | |
5443 | { | |
5444 | pci_set_power_state(pdev, PCI_D0); | |
5445 | pci_restore_state(pdev); | |
5446 | pci_enable_device(pdev); | |
5447 | pci_set_master(pdev); | |
5448 | return 0; | |
5449 | } | |
1da177e4 LT |
5450 | #endif /* CONFIG_PCI */ |
5451 | ||
5452 | ||
1da177e4 LT |
5453 | static int __init ata_init(void) |
5454 | { | |
5455 | ata_wq = create_workqueue("ata"); | |
5456 | if (!ata_wq) | |
5457 | return -ENOMEM; | |
5458 | ||
5459 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); | |
5460 | return 0; | |
5461 | } | |
5462 | ||
5463 | static void __exit ata_exit(void) | |
5464 | { | |
5465 | destroy_workqueue(ata_wq); | |
5466 | } | |
5467 | ||
5468 | module_init(ata_init); | |
5469 | module_exit(ata_exit); | |
5470 | ||
67846b30 JG |
5471 | static unsigned long ratelimit_time; |
5472 | static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED; | |
5473 | ||
5474 | int ata_ratelimit(void) | |
5475 | { | |
5476 | int rc; | |
5477 | unsigned long flags; | |
5478 | ||
5479 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
5480 | ||
5481 | if (time_after(jiffies, ratelimit_time)) { | |
5482 | rc = 1; | |
5483 | ratelimit_time = jiffies + (HZ/5); | |
5484 | } else | |
5485 | rc = 0; | |
5486 | ||
5487 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
5488 | ||
5489 | return rc; | |
5490 | } | |
5491 | ||
c22daff4 TH |
5492 | /** |
5493 | * ata_wait_register - wait until register value changes | |
5494 | * @reg: IO-mapped register | |
5495 | * @mask: Mask to apply to read register value | |
5496 | * @val: Wait condition | |
5497 | * @interval_msec: polling interval in milliseconds | |
5498 | * @timeout_msec: timeout in milliseconds | |
5499 | * | |
5500 | * Waiting for some bits of register to change is a common | |
5501 | * operation for ATA controllers. This function reads 32bit LE | |
5502 | * IO-mapped register @reg and tests for the following condition. | |
5503 | * | |
5504 | * (*@reg & mask) != val | |
5505 | * | |
5506 | * If the condition is met, it returns; otherwise, the process is | |
5507 | * repeated after @interval_msec until timeout. | |
5508 | * | |
5509 | * LOCKING: | |
5510 | * Kernel thread context (may sleep) | |
5511 | * | |
5512 | * RETURNS: | |
5513 | * The final register value. | |
5514 | */ | |
5515 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
5516 | unsigned long interval_msec, | |
5517 | unsigned long timeout_msec) | |
5518 | { | |
5519 | unsigned long timeout; | |
5520 | u32 tmp; | |
5521 | ||
5522 | tmp = ioread32(reg); | |
5523 | ||
5524 | /* Calculate timeout _after_ the first read to make sure | |
5525 | * preceding writes reach the controller before starting to | |
5526 | * eat away the timeout. | |
5527 | */ | |
5528 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
5529 | ||
5530 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
5531 | msleep(interval_msec); | |
5532 | tmp = ioread32(reg); | |
5533 | } | |
5534 | ||
5535 | return tmp; | |
5536 | } | |
5537 | ||
1da177e4 LT |
5538 | /* |
5539 | * libata is essentially a library of internal helper functions for | |
5540 | * low-level ATA host controller drivers. As such, the API/ABI is | |
5541 | * likely to change as new drivers are added and updated. | |
5542 | * Do not depend on ABI/API stability. | |
5543 | */ | |
5544 | ||
5545 | EXPORT_SYMBOL_GPL(ata_std_bios_param); | |
5546 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
5547 | EXPORT_SYMBOL_GPL(ata_device_add); | |
17b14451 | 5548 | EXPORT_SYMBOL_GPL(ata_host_set_remove); |
1da177e4 LT |
5549 | EXPORT_SYMBOL_GPL(ata_sg_init); |
5550 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
f686bcb8 | 5551 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
1da177e4 | 5552 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
1da177e4 LT |
5553 | EXPORT_SYMBOL_GPL(ata_tf_load); |
5554 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
5555 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
5556 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
5557 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); | |
5558 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
5559 | EXPORT_SYMBOL_GPL(ata_check_status); | |
5560 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
5561 | EXPORT_SYMBOL_GPL(ata_exec_command); |
5562 | EXPORT_SYMBOL_GPL(ata_port_start); | |
5563 | EXPORT_SYMBOL_GPL(ata_port_stop); | |
aa8f0dc6 | 5564 | EXPORT_SYMBOL_GPL(ata_host_stop); |
1da177e4 LT |
5565 | EXPORT_SYMBOL_GPL(ata_interrupt); |
5566 | EXPORT_SYMBOL_GPL(ata_qc_prep); | |
e46834cd | 5567 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
5568 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
5569 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
5570 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
5571 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
5572 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
6d97dbd7 TH |
5573 | EXPORT_SYMBOL_GPL(ata_bmdma_freeze); |
5574 | EXPORT_SYMBOL_GPL(ata_bmdma_thaw); | |
5575 | EXPORT_SYMBOL_GPL(ata_bmdma_drive_eh); | |
5576 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); | |
5577 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); | |
1da177e4 | 5578 | EXPORT_SYMBOL_GPL(ata_port_probe); |
3c567b7d | 5579 | EXPORT_SYMBOL_GPL(sata_set_spd); |
1da177e4 LT |
5580 | EXPORT_SYMBOL_GPL(sata_phy_reset); |
5581 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
5582 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
8a19ac89 | 5583 | EXPORT_SYMBOL_GPL(ata_std_probeinit); |
c2bd5804 TH |
5584 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
5585 | EXPORT_SYMBOL_GPL(sata_std_hardreset); | |
5586 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
5587 | EXPORT_SYMBOL_GPL(ata_std_probe_reset); | |
a62c0fc5 | 5588 | EXPORT_SYMBOL_GPL(ata_drive_probe_reset); |
623a3128 | 5589 | EXPORT_SYMBOL_GPL(ata_dev_revalidate); |
2e9edbf8 JG |
5590 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
5591 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 5592 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 5593 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 5594 | EXPORT_SYMBOL_GPL(ata_wait_register); |
6f8b9958 | 5595 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
86e45b6b | 5596 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
1da177e4 LT |
5597 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
5598 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 LT |
5599 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
5600 | EXPORT_SYMBOL_GPL(ata_scsi_release); | |
5601 | EXPORT_SYMBOL_GPL(ata_host_intr); | |
34bf2170 TH |
5602 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
5603 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
5604 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
5605 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
5606 | EXPORT_SYMBOL_GPL(ata_port_online); | |
5607 | EXPORT_SYMBOL_GPL(ata_port_offline); | |
6a62a04d TH |
5608 | EXPORT_SYMBOL_GPL(ata_id_string); |
5609 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
1da177e4 LT |
5610 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
5611 | ||
1bc4ccff | 5612 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
5613 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
5614 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
5615 | ||
1da177e4 LT |
5616 | #ifdef CONFIG_PCI |
5617 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
374b1873 | 5618 | EXPORT_SYMBOL_GPL(ata_pci_host_stop); |
1da177e4 LT |
5619 | EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); |
5620 | EXPORT_SYMBOL_GPL(ata_pci_init_one); | |
5621 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
9b847548 JA |
5622 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
5623 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
67951ade AC |
5624 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
5625 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 5626 | #endif /* CONFIG_PCI */ |
9b847548 JA |
5627 | |
5628 | EXPORT_SYMBOL_GPL(ata_device_suspend); | |
5629 | EXPORT_SYMBOL_GPL(ata_device_resume); | |
5630 | EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); | |
5631 | EXPORT_SYMBOL_GPL(ata_scsi_device_resume); | |
ece1d636 | 5632 | |
ece1d636 | 5633 | EXPORT_SYMBOL_GPL(ata_eng_timeout); |
7b70fc03 TH |
5634 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
5635 | EXPORT_SYMBOL_GPL(ata_port_abort); | |
e3180499 TH |
5636 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
5637 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); | |
5638 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
5639 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
5640 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
022bdb07 | 5641 | EXPORT_SYMBOL_GPL(ata_do_eh); |