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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 | ||
6aff8f1f TH |
64 | static unsigned int ata_dev_init_params(struct ata_port *ap, |
65 | struct ata_device *dev); | |
1da177e4 | 66 | static void ata_set_mode(struct ata_port *ap); |
83206a29 TH |
67 | static unsigned int ata_dev_set_xfermode(struct ata_port *ap, |
68 | struct ata_device *dev); | |
acf356b1 | 69 | static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev); |
1da177e4 LT |
70 | |
71 | static unsigned int ata_unique_id = 1; | |
72 | static struct workqueue_struct *ata_wq; | |
73 | ||
418dc1f5 | 74 | int atapi_enabled = 1; |
1623c81e JG |
75 | module_param(atapi_enabled, int, 0444); |
76 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
77 | ||
c3c013a2 JG |
78 | int libata_fua = 0; |
79 | module_param_named(fua, libata_fua, int, 0444); | |
80 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
81 | ||
1da177e4 LT |
82 | MODULE_AUTHOR("Jeff Garzik"); |
83 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
84 | MODULE_LICENSE("GPL"); | |
85 | MODULE_VERSION(DRV_VERSION); | |
86 | ||
0baab86b | 87 | |
1da177e4 LT |
88 | /** |
89 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
90 | * @tf: Taskfile to convert | |
91 | * @fis: Buffer into which data will output | |
92 | * @pmp: Port multiplier port | |
93 | * | |
94 | * Converts a standard ATA taskfile to a Serial ATA | |
95 | * FIS structure (Register - Host to Device). | |
96 | * | |
97 | * LOCKING: | |
98 | * Inherited from caller. | |
99 | */ | |
100 | ||
057ace5e | 101 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) |
1da177e4 LT |
102 | { |
103 | fis[0] = 0x27; /* Register - Host to Device FIS */ | |
104 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, | |
105 | bit 7 indicates Command FIS */ | |
106 | fis[2] = tf->command; | |
107 | fis[3] = tf->feature; | |
108 | ||
109 | fis[4] = tf->lbal; | |
110 | fis[5] = tf->lbam; | |
111 | fis[6] = tf->lbah; | |
112 | fis[7] = tf->device; | |
113 | ||
114 | fis[8] = tf->hob_lbal; | |
115 | fis[9] = tf->hob_lbam; | |
116 | fis[10] = tf->hob_lbah; | |
117 | fis[11] = tf->hob_feature; | |
118 | ||
119 | fis[12] = tf->nsect; | |
120 | fis[13] = tf->hob_nsect; | |
121 | fis[14] = 0; | |
122 | fis[15] = tf->ctl; | |
123 | ||
124 | fis[16] = 0; | |
125 | fis[17] = 0; | |
126 | fis[18] = 0; | |
127 | fis[19] = 0; | |
128 | } | |
129 | ||
130 | /** | |
131 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
132 | * @fis: Buffer from which data will be input | |
133 | * @tf: Taskfile to output | |
134 | * | |
e12a1be6 | 135 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
136 | * |
137 | * LOCKING: | |
138 | * Inherited from caller. | |
139 | */ | |
140 | ||
057ace5e | 141 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
142 | { |
143 | tf->command = fis[2]; /* status */ | |
144 | tf->feature = fis[3]; /* error */ | |
145 | ||
146 | tf->lbal = fis[4]; | |
147 | tf->lbam = fis[5]; | |
148 | tf->lbah = fis[6]; | |
149 | tf->device = fis[7]; | |
150 | ||
151 | tf->hob_lbal = fis[8]; | |
152 | tf->hob_lbam = fis[9]; | |
153 | tf->hob_lbah = fis[10]; | |
154 | ||
155 | tf->nsect = fis[12]; | |
156 | tf->hob_nsect = fis[13]; | |
157 | } | |
158 | ||
8cbd6df1 AL |
159 | static const u8 ata_rw_cmds[] = { |
160 | /* pio multi */ | |
161 | ATA_CMD_READ_MULTI, | |
162 | ATA_CMD_WRITE_MULTI, | |
163 | ATA_CMD_READ_MULTI_EXT, | |
164 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
165 | 0, |
166 | 0, | |
167 | 0, | |
168 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
169 | /* pio */ |
170 | ATA_CMD_PIO_READ, | |
171 | ATA_CMD_PIO_WRITE, | |
172 | ATA_CMD_PIO_READ_EXT, | |
173 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
174 | 0, |
175 | 0, | |
176 | 0, | |
177 | 0, | |
8cbd6df1 AL |
178 | /* dma */ |
179 | ATA_CMD_READ, | |
180 | ATA_CMD_WRITE, | |
181 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
182 | ATA_CMD_WRITE_EXT, |
183 | 0, | |
184 | 0, | |
185 | 0, | |
186 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 187 | }; |
1da177e4 LT |
188 | |
189 | /** | |
8cbd6df1 AL |
190 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
191 | * @qc: command to examine and configure | |
1da177e4 | 192 | * |
2e9edbf8 | 193 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 194 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
195 | * |
196 | * LOCKING: | |
197 | * caller. | |
198 | */ | |
9a3dccc4 | 199 | int ata_rwcmd_protocol(struct ata_queued_cmd *qc) |
1da177e4 | 200 | { |
8cbd6df1 AL |
201 | struct ata_taskfile *tf = &qc->tf; |
202 | struct ata_device *dev = qc->dev; | |
9a3dccc4 | 203 | u8 cmd; |
1da177e4 | 204 | |
9a3dccc4 | 205 | int index, fua, lba48, write; |
2e9edbf8 | 206 | |
9a3dccc4 | 207 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
208 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
209 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 210 | |
8cbd6df1 AL |
211 | if (dev->flags & ATA_DFLAG_PIO) { |
212 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 213 | index = dev->multi_count ? 0 : 8; |
8d238e01 AC |
214 | } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) { |
215 | /* Unable to use DMA due to host limitation */ | |
216 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 217 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
218 | } else { |
219 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 220 | index = 16; |
8cbd6df1 | 221 | } |
1da177e4 | 222 | |
9a3dccc4 TH |
223 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
224 | if (cmd) { | |
225 | tf->command = cmd; | |
226 | return 0; | |
227 | } | |
228 | return -1; | |
1da177e4 LT |
229 | } |
230 | ||
cb95d562 TH |
231 | /** |
232 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
233 | * @pio_mask: pio_mask | |
234 | * @mwdma_mask: mwdma_mask | |
235 | * @udma_mask: udma_mask | |
236 | * | |
237 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
238 | * unsigned int xfer_mask. | |
239 | * | |
240 | * LOCKING: | |
241 | * None. | |
242 | * | |
243 | * RETURNS: | |
244 | * Packed xfer_mask. | |
245 | */ | |
246 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
247 | unsigned int mwdma_mask, | |
248 | unsigned int udma_mask) | |
249 | { | |
250 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
251 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
252 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
253 | } | |
254 | ||
c0489e4e TH |
255 | /** |
256 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
257 | * @xfer_mask: xfer_mask to unpack | |
258 | * @pio_mask: resulting pio_mask | |
259 | * @mwdma_mask: resulting mwdma_mask | |
260 | * @udma_mask: resulting udma_mask | |
261 | * | |
262 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
263 | * Any NULL distination masks will be ignored. | |
264 | */ | |
265 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
266 | unsigned int *pio_mask, | |
267 | unsigned int *mwdma_mask, | |
268 | unsigned int *udma_mask) | |
269 | { | |
270 | if (pio_mask) | |
271 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
272 | if (mwdma_mask) | |
273 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
274 | if (udma_mask) | |
275 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
276 | } | |
277 | ||
cb95d562 TH |
278 | static const struct ata_xfer_ent { |
279 | unsigned int shift, bits; | |
280 | u8 base; | |
281 | } ata_xfer_tbl[] = { | |
282 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
283 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
284 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
285 | { -1, }, | |
286 | }; | |
287 | ||
288 | /** | |
289 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
290 | * @xfer_mask: xfer_mask of interest | |
291 | * | |
292 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
293 | * bit of @xfer_mask is considered. | |
294 | * | |
295 | * LOCKING: | |
296 | * None. | |
297 | * | |
298 | * RETURNS: | |
299 | * Matching XFER_* value, 0 if no match found. | |
300 | */ | |
301 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
302 | { | |
303 | int highbit = fls(xfer_mask) - 1; | |
304 | const struct ata_xfer_ent *ent; | |
305 | ||
306 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
307 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
308 | return ent->base + highbit - ent->shift; | |
309 | return 0; | |
310 | } | |
311 | ||
312 | /** | |
313 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
314 | * @xfer_mode: XFER_* of interest | |
315 | * | |
316 | * Return matching xfer_mask for @xfer_mode. | |
317 | * | |
318 | * LOCKING: | |
319 | * None. | |
320 | * | |
321 | * RETURNS: | |
322 | * Matching xfer_mask, 0 if no match found. | |
323 | */ | |
324 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
325 | { | |
326 | const struct ata_xfer_ent *ent; | |
327 | ||
328 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
329 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
330 | return 1 << (ent->shift + xfer_mode - ent->base); | |
331 | return 0; | |
332 | } | |
333 | ||
334 | /** | |
335 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
336 | * @xfer_mode: XFER_* of interest | |
337 | * | |
338 | * Return matching xfer_shift for @xfer_mode. | |
339 | * | |
340 | * LOCKING: | |
341 | * None. | |
342 | * | |
343 | * RETURNS: | |
344 | * Matching xfer_shift, -1 if no match found. | |
345 | */ | |
346 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
347 | { | |
348 | const struct ata_xfer_ent *ent; | |
349 | ||
350 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
351 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
352 | return ent->shift; | |
353 | return -1; | |
354 | } | |
355 | ||
1da177e4 | 356 | /** |
1da7b0d0 TH |
357 | * ata_mode_string - convert xfer_mask to string |
358 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
359 | * |
360 | * Determine string which represents the highest speed | |
1da7b0d0 | 361 | * (highest bit in @modemask). |
1da177e4 LT |
362 | * |
363 | * LOCKING: | |
364 | * None. | |
365 | * | |
366 | * RETURNS: | |
367 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 368 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 369 | */ |
1da7b0d0 | 370 | static const char *ata_mode_string(unsigned int xfer_mask) |
1da177e4 | 371 | { |
75f554bc TH |
372 | static const char * const xfer_mode_str[] = { |
373 | "PIO0", | |
374 | "PIO1", | |
375 | "PIO2", | |
376 | "PIO3", | |
377 | "PIO4", | |
378 | "MWDMA0", | |
379 | "MWDMA1", | |
380 | "MWDMA2", | |
381 | "UDMA/16", | |
382 | "UDMA/25", | |
383 | "UDMA/33", | |
384 | "UDMA/44", | |
385 | "UDMA/66", | |
386 | "UDMA/100", | |
387 | "UDMA/133", | |
388 | "UDMA7", | |
389 | }; | |
1da7b0d0 | 390 | int highbit; |
1da177e4 | 391 | |
1da7b0d0 TH |
392 | highbit = fls(xfer_mask) - 1; |
393 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
394 | return xfer_mode_str[highbit]; | |
1da177e4 | 395 | return "<n/a>"; |
1da177e4 LT |
396 | } |
397 | ||
0b8efb0a TH |
398 | static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev) |
399 | { | |
400 | if (ata_dev_present(dev)) { | |
401 | printk(KERN_WARNING "ata%u: dev %u disabled\n", | |
402 | ap->id, dev->devno); | |
403 | dev->class++; | |
404 | } | |
405 | } | |
406 | ||
1da177e4 LT |
407 | /** |
408 | * ata_pio_devchk - PATA device presence detection | |
409 | * @ap: ATA channel to examine | |
410 | * @device: Device to examine (starting at zero) | |
411 | * | |
412 | * This technique was originally described in | |
413 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
414 | * later found its way into the ATA/ATAPI spec. | |
415 | * | |
416 | * Write a pattern to the ATA shadow registers, | |
417 | * and if a device is present, it will respond by | |
418 | * correctly storing and echoing back the | |
419 | * ATA shadow register contents. | |
420 | * | |
421 | * LOCKING: | |
422 | * caller. | |
423 | */ | |
424 | ||
425 | static unsigned int ata_pio_devchk(struct ata_port *ap, | |
426 | unsigned int device) | |
427 | { | |
428 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
429 | u8 nsect, lbal; | |
430 | ||
431 | ap->ops->dev_select(ap, device); | |
432 | ||
433 | outb(0x55, ioaddr->nsect_addr); | |
434 | outb(0xaa, ioaddr->lbal_addr); | |
435 | ||
436 | outb(0xaa, ioaddr->nsect_addr); | |
437 | outb(0x55, ioaddr->lbal_addr); | |
438 | ||
439 | outb(0x55, ioaddr->nsect_addr); | |
440 | outb(0xaa, ioaddr->lbal_addr); | |
441 | ||
442 | nsect = inb(ioaddr->nsect_addr); | |
443 | lbal = inb(ioaddr->lbal_addr); | |
444 | ||
445 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
446 | return 1; /* we found a device */ | |
447 | ||
448 | return 0; /* nothing found */ | |
449 | } | |
450 | ||
451 | /** | |
452 | * ata_mmio_devchk - PATA device presence detection | |
453 | * @ap: ATA channel to examine | |
454 | * @device: Device to examine (starting at zero) | |
455 | * | |
456 | * This technique was originally described in | |
457 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
458 | * later found its way into the ATA/ATAPI spec. | |
459 | * | |
460 | * Write a pattern to the ATA shadow registers, | |
461 | * and if a device is present, it will respond by | |
462 | * correctly storing and echoing back the | |
463 | * ATA shadow register contents. | |
464 | * | |
465 | * LOCKING: | |
466 | * caller. | |
467 | */ | |
468 | ||
469 | static unsigned int ata_mmio_devchk(struct ata_port *ap, | |
470 | unsigned int device) | |
471 | { | |
472 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
473 | u8 nsect, lbal; | |
474 | ||
475 | ap->ops->dev_select(ap, device); | |
476 | ||
477 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
478 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
479 | ||
480 | writeb(0xaa, (void __iomem *) ioaddr->nsect_addr); | |
481 | writeb(0x55, (void __iomem *) ioaddr->lbal_addr); | |
482 | ||
483 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
484 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
485 | ||
486 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
487 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
488 | ||
489 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
490 | return 1; /* we found a device */ | |
491 | ||
492 | return 0; /* nothing found */ | |
493 | } | |
494 | ||
495 | /** | |
496 | * ata_devchk - PATA device presence detection | |
497 | * @ap: ATA channel to examine | |
498 | * @device: Device to examine (starting at zero) | |
499 | * | |
500 | * Dispatch ATA device presence detection, depending | |
501 | * on whether we are using PIO or MMIO to talk to the | |
502 | * ATA shadow registers. | |
503 | * | |
504 | * LOCKING: | |
505 | * caller. | |
506 | */ | |
507 | ||
508 | static unsigned int ata_devchk(struct ata_port *ap, | |
509 | unsigned int device) | |
510 | { | |
511 | if (ap->flags & ATA_FLAG_MMIO) | |
512 | return ata_mmio_devchk(ap, device); | |
513 | return ata_pio_devchk(ap, device); | |
514 | } | |
515 | ||
516 | /** | |
517 | * ata_dev_classify - determine device type based on ATA-spec signature | |
518 | * @tf: ATA taskfile register set for device to be identified | |
519 | * | |
520 | * Determine from taskfile register contents whether a device is | |
521 | * ATA or ATAPI, as per "Signature and persistence" section | |
522 | * of ATA/PI spec (volume 1, sect 5.14). | |
523 | * | |
524 | * LOCKING: | |
525 | * None. | |
526 | * | |
527 | * RETURNS: | |
528 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN | |
529 | * the event of failure. | |
530 | */ | |
531 | ||
057ace5e | 532 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
533 | { |
534 | /* Apple's open source Darwin code hints that some devices only | |
535 | * put a proper signature into the LBA mid/high registers, | |
536 | * So, we only check those. It's sufficient for uniqueness. | |
537 | */ | |
538 | ||
539 | if (((tf->lbam == 0) && (tf->lbah == 0)) || | |
540 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { | |
541 | DPRINTK("found ATA device by sig\n"); | |
542 | return ATA_DEV_ATA; | |
543 | } | |
544 | ||
545 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || | |
546 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { | |
547 | DPRINTK("found ATAPI device by sig\n"); | |
548 | return ATA_DEV_ATAPI; | |
549 | } | |
550 | ||
551 | DPRINTK("unknown device\n"); | |
552 | return ATA_DEV_UNKNOWN; | |
553 | } | |
554 | ||
555 | /** | |
556 | * ata_dev_try_classify - Parse returned ATA device signature | |
557 | * @ap: ATA channel to examine | |
558 | * @device: Device to examine (starting at zero) | |
b4dc7623 | 559 | * @r_err: Value of error register on completion |
1da177e4 LT |
560 | * |
561 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
562 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
563 | * shadow registers, indicating the results of device detection | |
564 | * and diagnostics. | |
565 | * | |
566 | * Select the ATA device, and read the values from the ATA shadow | |
567 | * registers. Then parse according to the Error register value, | |
568 | * and the spec-defined values examined by ata_dev_classify(). | |
569 | * | |
570 | * LOCKING: | |
571 | * caller. | |
b4dc7623 TH |
572 | * |
573 | * RETURNS: | |
574 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 LT |
575 | */ |
576 | ||
b4dc7623 TH |
577 | static unsigned int |
578 | ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) | |
1da177e4 | 579 | { |
1da177e4 LT |
580 | struct ata_taskfile tf; |
581 | unsigned int class; | |
582 | u8 err; | |
583 | ||
584 | ap->ops->dev_select(ap, device); | |
585 | ||
586 | memset(&tf, 0, sizeof(tf)); | |
587 | ||
1da177e4 | 588 | ap->ops->tf_read(ap, &tf); |
0169e284 | 589 | err = tf.feature; |
b4dc7623 TH |
590 | if (r_err) |
591 | *r_err = err; | |
1da177e4 LT |
592 | |
593 | /* see if device passed diags */ | |
594 | if (err == 1) | |
595 | /* do nothing */ ; | |
596 | else if ((device == 0) && (err == 0x81)) | |
597 | /* do nothing */ ; | |
598 | else | |
b4dc7623 | 599 | return ATA_DEV_NONE; |
1da177e4 | 600 | |
b4dc7623 | 601 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 602 | class = ata_dev_classify(&tf); |
b4dc7623 | 603 | |
1da177e4 | 604 | if (class == ATA_DEV_UNKNOWN) |
b4dc7623 | 605 | return ATA_DEV_NONE; |
1da177e4 | 606 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
b4dc7623 TH |
607 | return ATA_DEV_NONE; |
608 | return class; | |
1da177e4 LT |
609 | } |
610 | ||
611 | /** | |
6a62a04d | 612 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
613 | * @id: IDENTIFY DEVICE results we will examine |
614 | * @s: string into which data is output | |
615 | * @ofs: offset into identify device page | |
616 | * @len: length of string to return. must be an even number. | |
617 | * | |
618 | * The strings in the IDENTIFY DEVICE page are broken up into | |
619 | * 16-bit chunks. Run through the string, and output each | |
620 | * 8-bit chunk linearly, regardless of platform. | |
621 | * | |
622 | * LOCKING: | |
623 | * caller. | |
624 | */ | |
625 | ||
6a62a04d TH |
626 | void ata_id_string(const u16 *id, unsigned char *s, |
627 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
628 | { |
629 | unsigned int c; | |
630 | ||
631 | while (len > 0) { | |
632 | c = id[ofs] >> 8; | |
633 | *s = c; | |
634 | s++; | |
635 | ||
636 | c = id[ofs] & 0xff; | |
637 | *s = c; | |
638 | s++; | |
639 | ||
640 | ofs++; | |
641 | len -= 2; | |
642 | } | |
643 | } | |
644 | ||
0e949ff3 | 645 | /** |
6a62a04d | 646 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
647 | * @id: IDENTIFY DEVICE results we will examine |
648 | * @s: string into which data is output | |
649 | * @ofs: offset into identify device page | |
650 | * @len: length of string to return. must be an odd number. | |
651 | * | |
6a62a04d | 652 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
653 | * trims trailing spaces and terminates the resulting string with |
654 | * null. @len must be actual maximum length (even number) + 1. | |
655 | * | |
656 | * LOCKING: | |
657 | * caller. | |
658 | */ | |
6a62a04d TH |
659 | void ata_id_c_string(const u16 *id, unsigned char *s, |
660 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
661 | { |
662 | unsigned char *p; | |
663 | ||
664 | WARN_ON(!(len & 1)); | |
665 | ||
6a62a04d | 666 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
667 | |
668 | p = s + strnlen(s, len - 1); | |
669 | while (p > s && p[-1] == ' ') | |
670 | p--; | |
671 | *p = '\0'; | |
672 | } | |
0baab86b | 673 | |
2940740b TH |
674 | static u64 ata_id_n_sectors(const u16 *id) |
675 | { | |
676 | if (ata_id_has_lba(id)) { | |
677 | if (ata_id_has_lba48(id)) | |
678 | return ata_id_u64(id, 100); | |
679 | else | |
680 | return ata_id_u32(id, 60); | |
681 | } else { | |
682 | if (ata_id_current_chs_valid(id)) | |
683 | return ata_id_u32(id, 57); | |
684 | else | |
685 | return id[1] * id[3] * id[6]; | |
686 | } | |
687 | } | |
688 | ||
0baab86b EF |
689 | /** |
690 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
691 | * @ap: ATA channel to manipulate | |
692 | * @device: ATA device (numbered from zero) to select | |
693 | * | |
694 | * This function performs no actual function. | |
695 | * | |
696 | * May be used as the dev_select() entry in ata_port_operations. | |
697 | * | |
698 | * LOCKING: | |
699 | * caller. | |
700 | */ | |
1da177e4 LT |
701 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
702 | { | |
703 | } | |
704 | ||
0baab86b | 705 | |
1da177e4 LT |
706 | /** |
707 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
708 | * @ap: ATA channel to manipulate | |
709 | * @device: ATA device (numbered from zero) to select | |
710 | * | |
711 | * Use the method defined in the ATA specification to | |
712 | * make either device 0, or device 1, active on the | |
0baab86b EF |
713 | * ATA channel. Works with both PIO and MMIO. |
714 | * | |
715 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
716 | * |
717 | * LOCKING: | |
718 | * caller. | |
719 | */ | |
720 | ||
721 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
722 | { | |
723 | u8 tmp; | |
724 | ||
725 | if (device == 0) | |
726 | tmp = ATA_DEVICE_OBS; | |
727 | else | |
728 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
729 | ||
730 | if (ap->flags & ATA_FLAG_MMIO) { | |
731 | writeb(tmp, (void __iomem *) ap->ioaddr.device_addr); | |
732 | } else { | |
733 | outb(tmp, ap->ioaddr.device_addr); | |
734 | } | |
735 | ata_pause(ap); /* needed; also flushes, for mmio */ | |
736 | } | |
737 | ||
738 | /** | |
739 | * ata_dev_select - Select device 0/1 on ATA bus | |
740 | * @ap: ATA channel to manipulate | |
741 | * @device: ATA device (numbered from zero) to select | |
742 | * @wait: non-zero to wait for Status register BSY bit to clear | |
743 | * @can_sleep: non-zero if context allows sleeping | |
744 | * | |
745 | * Use the method defined in the ATA specification to | |
746 | * make either device 0, or device 1, active on the | |
747 | * ATA channel. | |
748 | * | |
749 | * This is a high-level version of ata_std_dev_select(), | |
750 | * which additionally provides the services of inserting | |
751 | * the proper pauses and status polling, where needed. | |
752 | * | |
753 | * LOCKING: | |
754 | * caller. | |
755 | */ | |
756 | ||
757 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
758 | unsigned int wait, unsigned int can_sleep) | |
759 | { | |
760 | VPRINTK("ENTER, ata%u: device %u, wait %u\n", | |
761 | ap->id, device, wait); | |
762 | ||
763 | if (wait) | |
764 | ata_wait_idle(ap); | |
765 | ||
766 | ap->ops->dev_select(ap, device); | |
767 | ||
768 | if (wait) { | |
769 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) | |
770 | msleep(150); | |
771 | ata_wait_idle(ap); | |
772 | } | |
773 | } | |
774 | ||
775 | /** | |
776 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 777 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 778 | * |
0bd3300a TH |
779 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
780 | * page. | |
1da177e4 LT |
781 | * |
782 | * LOCKING: | |
783 | * caller. | |
784 | */ | |
785 | ||
0bd3300a | 786 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
787 | { |
788 | DPRINTK("49==0x%04x " | |
789 | "53==0x%04x " | |
790 | "63==0x%04x " | |
791 | "64==0x%04x " | |
792 | "75==0x%04x \n", | |
0bd3300a TH |
793 | id[49], |
794 | id[53], | |
795 | id[63], | |
796 | id[64], | |
797 | id[75]); | |
1da177e4 LT |
798 | DPRINTK("80==0x%04x " |
799 | "81==0x%04x " | |
800 | "82==0x%04x " | |
801 | "83==0x%04x " | |
802 | "84==0x%04x \n", | |
0bd3300a TH |
803 | id[80], |
804 | id[81], | |
805 | id[82], | |
806 | id[83], | |
807 | id[84]); | |
1da177e4 LT |
808 | DPRINTK("88==0x%04x " |
809 | "93==0x%04x\n", | |
0bd3300a TH |
810 | id[88], |
811 | id[93]); | |
1da177e4 LT |
812 | } |
813 | ||
cb95d562 TH |
814 | /** |
815 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
816 | * @id: IDENTIFY data to compute xfer mask from | |
817 | * | |
818 | * Compute the xfermask for this device. This is not as trivial | |
819 | * as it seems if we must consider early devices correctly. | |
820 | * | |
821 | * FIXME: pre IDE drive timing (do we care ?). | |
822 | * | |
823 | * LOCKING: | |
824 | * None. | |
825 | * | |
826 | * RETURNS: | |
827 | * Computed xfermask | |
828 | */ | |
829 | static unsigned int ata_id_xfermask(const u16 *id) | |
830 | { | |
831 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
832 | ||
833 | /* Usual case. Word 53 indicates word 64 is valid */ | |
834 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
835 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
836 | pio_mask <<= 3; | |
837 | pio_mask |= 0x7; | |
838 | } else { | |
839 | /* If word 64 isn't valid then Word 51 high byte holds | |
840 | * the PIO timing number for the maximum. Turn it into | |
841 | * a mask. | |
842 | */ | |
843 | pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ; | |
844 | ||
845 | /* But wait.. there's more. Design your standards by | |
846 | * committee and you too can get a free iordy field to | |
847 | * process. However its the speeds not the modes that | |
848 | * are supported... Note drivers using the timing API | |
849 | * will get this right anyway | |
850 | */ | |
851 | } | |
852 | ||
853 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 TH |
854 | |
855 | udma_mask = 0; | |
856 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
857 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
858 | |
859 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
860 | } | |
861 | ||
86e45b6b TH |
862 | /** |
863 | * ata_port_queue_task - Queue port_task | |
864 | * @ap: The ata_port to queue port_task for | |
865 | * | |
866 | * Schedule @fn(@data) for execution after @delay jiffies using | |
867 | * port_task. There is one port_task per port and it's the | |
868 | * user(low level driver)'s responsibility to make sure that only | |
869 | * one task is active at any given time. | |
870 | * | |
871 | * libata core layer takes care of synchronization between | |
872 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
873 | * synchronization. | |
874 | * | |
875 | * LOCKING: | |
876 | * Inherited from caller. | |
877 | */ | |
878 | void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data, | |
879 | unsigned long delay) | |
880 | { | |
881 | int rc; | |
882 | ||
2e755f68 | 883 | if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK) |
86e45b6b TH |
884 | return; |
885 | ||
886 | PREPARE_WORK(&ap->port_task, fn, data); | |
887 | ||
888 | if (!delay) | |
889 | rc = queue_work(ata_wq, &ap->port_task); | |
890 | else | |
891 | rc = queue_delayed_work(ata_wq, &ap->port_task, delay); | |
892 | ||
893 | /* rc == 0 means that another user is using port task */ | |
894 | WARN_ON(rc == 0); | |
895 | } | |
896 | ||
897 | /** | |
898 | * ata_port_flush_task - Flush port_task | |
899 | * @ap: The ata_port to flush port_task for | |
900 | * | |
901 | * After this function completes, port_task is guranteed not to | |
902 | * be running or scheduled. | |
903 | * | |
904 | * LOCKING: | |
905 | * Kernel thread context (may sleep) | |
906 | */ | |
907 | void ata_port_flush_task(struct ata_port *ap) | |
908 | { | |
909 | unsigned long flags; | |
910 | ||
911 | DPRINTK("ENTER\n"); | |
912 | ||
913 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
2e755f68 | 914 | ap->flags |= ATA_FLAG_FLUSH_PORT_TASK; |
86e45b6b TH |
915 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
916 | ||
917 | DPRINTK("flush #1\n"); | |
918 | flush_workqueue(ata_wq); | |
919 | ||
920 | /* | |
921 | * At this point, if a task is running, it's guaranteed to see | |
922 | * the FLUSH flag; thus, it will never queue pio tasks again. | |
923 | * Cancel and flush. | |
924 | */ | |
925 | if (!cancel_delayed_work(&ap->port_task)) { | |
926 | DPRINTK("flush #2\n"); | |
927 | flush_workqueue(ata_wq); | |
928 | } | |
929 | ||
930 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
2e755f68 | 931 | ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK; |
86e45b6b TH |
932 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
933 | ||
934 | DPRINTK("EXIT\n"); | |
935 | } | |
936 | ||
77853bf2 | 937 | void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 938 | { |
77853bf2 | 939 | struct completion *waiting = qc->private_data; |
a2a7a662 | 940 | |
77853bf2 | 941 | qc->ap->ops->tf_read(qc->ap, &qc->tf); |
a2a7a662 | 942 | complete(waiting); |
a2a7a662 TH |
943 | } |
944 | ||
945 | /** | |
946 | * ata_exec_internal - execute libata internal command | |
947 | * @ap: Port to which the command is sent | |
948 | * @dev: Device to which the command is sent | |
949 | * @tf: Taskfile registers for the command and the result | |
950 | * @dma_dir: Data tranfer direction of the command | |
951 | * @buf: Data buffer of the command | |
952 | * @buflen: Length of data buffer | |
953 | * | |
954 | * Executes libata internal command with timeout. @tf contains | |
955 | * command on entry and result on return. Timeout and error | |
956 | * conditions are reported via return value. No recovery action | |
957 | * is taken after a command times out. It's caller's duty to | |
958 | * clean up after timeout. | |
959 | * | |
960 | * LOCKING: | |
961 | * None. Should be called with kernel context, might sleep. | |
962 | */ | |
963 | ||
964 | static unsigned | |
965 | ata_exec_internal(struct ata_port *ap, struct ata_device *dev, | |
966 | struct ata_taskfile *tf, | |
967 | int dma_dir, void *buf, unsigned int buflen) | |
968 | { | |
969 | u8 command = tf->command; | |
970 | struct ata_queued_cmd *qc; | |
971 | DECLARE_COMPLETION(wait); | |
972 | unsigned long flags; | |
77853bf2 | 973 | unsigned int err_mask; |
a2a7a662 TH |
974 | |
975 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
976 | ||
977 | qc = ata_qc_new_init(ap, dev); | |
978 | BUG_ON(qc == NULL); | |
979 | ||
980 | qc->tf = *tf; | |
981 | qc->dma_dir = dma_dir; | |
982 | if (dma_dir != DMA_NONE) { | |
983 | ata_sg_init_one(qc, buf, buflen); | |
984 | qc->nsect = buflen / ATA_SECT_SIZE; | |
985 | } | |
986 | ||
77853bf2 | 987 | qc->private_data = &wait; |
a2a7a662 TH |
988 | qc->complete_fn = ata_qc_complete_internal; |
989 | ||
9a3d9eb0 TH |
990 | qc->err_mask = ata_qc_issue(qc); |
991 | if (qc->err_mask) | |
8e436af9 | 992 | ata_qc_complete(qc); |
a2a7a662 TH |
993 | |
994 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
995 | ||
996 | if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) { | |
41ade50c AL |
997 | ata_port_flush_task(ap); |
998 | ||
a2a7a662 TH |
999 | spin_lock_irqsave(&ap->host_set->lock, flags); |
1000 | ||
1001 | /* We're racing with irq here. If we lose, the | |
1002 | * following test prevents us from completing the qc | |
1003 | * again. If completion irq occurs after here but | |
1004 | * before the caller cleans up, it will result in a | |
1005 | * spurious interrupt. We can live with that. | |
1006 | */ | |
77853bf2 | 1007 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
11a56d24 | 1008 | qc->err_mask = AC_ERR_TIMEOUT; |
a2a7a662 TH |
1009 | ata_qc_complete(qc); |
1010 | printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n", | |
1011 | ap->id, command); | |
1012 | } | |
1013 | ||
1014 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1015 | } | |
1016 | ||
77853bf2 TH |
1017 | *tf = qc->tf; |
1018 | err_mask = qc->err_mask; | |
1019 | ||
1020 | ata_qc_free(qc); | |
1021 | ||
1f7dd3e9 TH |
1022 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1023 | * Until those drivers are fixed, we detect the condition | |
1024 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1025 | * port. | |
1026 | * | |
1027 | * Note that this doesn't change any behavior as internal | |
1028 | * command failure results in disabling the device in the | |
1029 | * higher layer for LLDDs without new reset/EH callbacks. | |
1030 | * | |
1031 | * Kill the following code as soon as those drivers are fixed. | |
1032 | */ | |
1033 | if (ap->flags & ATA_FLAG_PORT_DISABLED) { | |
1034 | err_mask |= AC_ERR_SYSTEM; | |
1035 | ata_port_probe(ap); | |
1036 | } | |
1037 | ||
77853bf2 | 1038 | return err_mask; |
a2a7a662 TH |
1039 | } |
1040 | ||
1bc4ccff AC |
1041 | /** |
1042 | * ata_pio_need_iordy - check if iordy needed | |
1043 | * @adev: ATA device | |
1044 | * | |
1045 | * Check if the current speed of the device requires IORDY. Used | |
1046 | * by various controllers for chip configuration. | |
1047 | */ | |
1048 | ||
1049 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) | |
1050 | { | |
1051 | int pio; | |
1052 | int speed = adev->pio_mode - XFER_PIO_0; | |
1053 | ||
1054 | if (speed < 2) | |
1055 | return 0; | |
1056 | if (speed > 2) | |
1057 | return 1; | |
2e9edbf8 | 1058 | |
1bc4ccff AC |
1059 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1060 | ||
1061 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ | |
1062 | pio = adev->id[ATA_ID_EIDE_PIO]; | |
1063 | /* Is the speed faster than the drive allows non IORDY ? */ | |
1064 | if (pio) { | |
1065 | /* This is cycle times not frequency - watch the logic! */ | |
1066 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
1067 | return 1; | |
1068 | return 0; | |
1069 | } | |
1070 | } | |
1071 | return 0; | |
1072 | } | |
1073 | ||
1da177e4 | 1074 | /** |
49016aca TH |
1075 | * ata_dev_read_id - Read ID data from the specified device |
1076 | * @ap: port on which target device resides | |
1077 | * @dev: target device | |
1078 | * @p_class: pointer to class of the target device (may be changed) | |
1079 | * @post_reset: is this read ID post-reset? | |
d9572b1d | 1080 | * @p_id: read IDENTIFY page (newly allocated) |
1da177e4 | 1081 | * |
49016aca TH |
1082 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1083 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
1084 | * devices. This function also takes care of EDD signature | |
1085 | * misreporting (to be removed once EDD support is gone) and | |
1086 | * issues ATA_CMD_INIT_DEV_PARAMS for pre-ATA4 drives. | |
1da177e4 LT |
1087 | * |
1088 | * LOCKING: | |
49016aca TH |
1089 | * Kernel thread context (may sleep) |
1090 | * | |
1091 | * RETURNS: | |
1092 | * 0 on success, -errno otherwise. | |
1da177e4 | 1093 | */ |
49016aca | 1094 | static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev, |
d9572b1d | 1095 | unsigned int *p_class, int post_reset, u16 **p_id) |
1da177e4 | 1096 | { |
49016aca | 1097 | unsigned int class = *p_class; |
1da177e4 | 1098 | unsigned int using_edd; |
a0123703 | 1099 | struct ata_taskfile tf; |
49016aca | 1100 | unsigned int err_mask = 0; |
d9572b1d | 1101 | u16 *id; |
49016aca TH |
1102 | const char *reason; |
1103 | int rc; | |
1da177e4 | 1104 | |
49016aca | 1105 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 | 1106 | |
61eb066a TH |
1107 | if (ap->ops->probe_reset || |
1108 | ap->flags & (ATA_FLAG_SRST | ATA_FLAG_SATA_RESET)) | |
1da177e4 LT |
1109 | using_edd = 0; |
1110 | else | |
1111 | using_edd = 1; | |
1112 | ||
49016aca | 1113 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
1da177e4 | 1114 | |
d9572b1d TH |
1115 | id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL); |
1116 | if (id == NULL) { | |
1117 | rc = -ENOMEM; | |
1118 | reason = "out of memory"; | |
1119 | goto err_out; | |
1120 | } | |
1121 | ||
49016aca TH |
1122 | retry: |
1123 | ata_tf_init(ap, &tf, dev->devno); | |
a0123703 | 1124 | |
49016aca TH |
1125 | switch (class) { |
1126 | case ATA_DEV_ATA: | |
a0123703 | 1127 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1128 | break; |
1129 | case ATA_DEV_ATAPI: | |
a0123703 | 1130 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1131 | break; |
1132 | default: | |
1133 | rc = -ENODEV; | |
1134 | reason = "unsupported class"; | |
1135 | goto err_out; | |
1da177e4 LT |
1136 | } |
1137 | ||
a0123703 | 1138 | tf.protocol = ATA_PROT_PIO; |
1da177e4 | 1139 | |
a0123703 | 1140 | err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE, |
49016aca | 1141 | id, sizeof(id[0]) * ATA_ID_WORDS); |
1da177e4 | 1142 | |
a0123703 | 1143 | if (err_mask) { |
49016aca TH |
1144 | rc = -EIO; |
1145 | reason = "I/O error"; | |
1146 | ||
a0123703 TH |
1147 | if (err_mask & ~AC_ERR_DEV) |
1148 | goto err_out; | |
0169e284 | 1149 | |
1da177e4 LT |
1150 | /* |
1151 | * arg! EDD works for all test cases, but seems to return | |
1152 | * the ATA signature for some ATAPI devices. Until the | |
1153 | * reason for this is found and fixed, we fix up the mess | |
1154 | * here. If IDENTIFY DEVICE returns command aborted | |
1155 | * (as ATAPI devices do), then we issue an | |
1156 | * IDENTIFY PACKET DEVICE. | |
1157 | * | |
1158 | * ATA software reset (SRST, the default) does not appear | |
1159 | * to have this problem. | |
1160 | */ | |
49016aca | 1161 | if ((using_edd) && (class == ATA_DEV_ATA)) { |
a0123703 | 1162 | u8 err = tf.feature; |
1da177e4 | 1163 | if (err & ATA_ABORTED) { |
49016aca | 1164 | class = ATA_DEV_ATAPI; |
1da177e4 LT |
1165 | goto retry; |
1166 | } | |
1167 | } | |
1168 | goto err_out; | |
1169 | } | |
1170 | ||
49016aca | 1171 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1172 | |
49016aca TH |
1173 | /* sanity check */ |
1174 | if ((class == ATA_DEV_ATA) != ata_id_is_ata(id)) { | |
1175 | rc = -EINVAL; | |
1176 | reason = "device reports illegal type"; | |
1177 | goto err_out; | |
1178 | } | |
1179 | ||
1180 | if (post_reset && class == ATA_DEV_ATA) { | |
1181 | /* | |
1182 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1183 | * SRST RESET | |
1184 | * IDENTIFY | |
1185 | * INITIALIZE DEVICE PARAMETERS | |
1186 | * anything else.. | |
1187 | * Some drives were very specific about that exact sequence. | |
1188 | */ | |
1189 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
1190 | err_mask = ata_dev_init_params(ap, dev); | |
1191 | if (err_mask) { | |
1192 | rc = -EIO; | |
1193 | reason = "INIT_DEV_PARAMS failed"; | |
1194 | goto err_out; | |
1195 | } | |
1196 | ||
1197 | /* current CHS translation info (id[53-58]) might be | |
1198 | * changed. reread the identify device info. | |
1199 | */ | |
1200 | post_reset = 0; | |
1201 | goto retry; | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | *p_class = class; | |
d9572b1d | 1206 | *p_id = id; |
49016aca TH |
1207 | return 0; |
1208 | ||
1209 | err_out: | |
1210 | printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n", | |
1211 | ap->id, dev->devno, reason); | |
d9572b1d | 1212 | kfree(id); |
49016aca TH |
1213 | return rc; |
1214 | } | |
1215 | ||
4b2f3ede TH |
1216 | static inline u8 ata_dev_knobble(const struct ata_port *ap, |
1217 | struct ata_device *dev) | |
1218 | { | |
1219 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
1220 | } | |
1221 | ||
49016aca | 1222 | /** |
ffeae418 TH |
1223 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
1224 | * @ap: Port on which target device resides | |
1225 | * @dev: Target device to configure | |
4c2d721a | 1226 | * @print_info: Enable device info printout |
ffeae418 TH |
1227 | * |
1228 | * Configure @dev according to @dev->id. Generic and low-level | |
1229 | * driver specific fixups are also applied. | |
49016aca TH |
1230 | * |
1231 | * LOCKING: | |
ffeae418 TH |
1232 | * Kernel thread context (may sleep) |
1233 | * | |
1234 | * RETURNS: | |
1235 | * 0 on success, -errno otherwise | |
49016aca | 1236 | */ |
4c2d721a TH |
1237 | static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, |
1238 | int print_info) | |
49016aca | 1239 | { |
1148c3a7 | 1240 | const u16 *id = dev->id; |
ff8854b2 | 1241 | unsigned int xfer_mask; |
49016aca TH |
1242 | int i, rc; |
1243 | ||
1244 | if (!ata_dev_present(dev)) { | |
1245 | DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n", | |
ffeae418 TH |
1246 | ap->id, dev->devno); |
1247 | return 0; | |
49016aca TH |
1248 | } |
1249 | ||
ffeae418 | 1250 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 | 1251 | |
c39f5ebe TH |
1252 | /* print device capabilities */ |
1253 | if (print_info) | |
1254 | printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x " | |
1255 | "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", | |
1256 | ap->id, dev->devno, id[49], id[82], id[83], | |
1257 | id[84], id[85], id[86], id[87], id[88]); | |
1258 | ||
208a9933 TH |
1259 | /* initialize to-be-configured parameters */ |
1260 | dev->flags = 0; | |
1261 | dev->max_sectors = 0; | |
1262 | dev->cdb_len = 0; | |
1263 | dev->n_sectors = 0; | |
1264 | dev->cylinders = 0; | |
1265 | dev->heads = 0; | |
1266 | dev->sectors = 0; | |
1267 | ||
1da177e4 LT |
1268 | /* |
1269 | * common ATA, ATAPI feature tests | |
1270 | */ | |
1271 | ||
ff8854b2 | 1272 | /* find max transfer mode; for printk only */ |
1148c3a7 | 1273 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 1274 | |
1148c3a7 | 1275 | ata_dump_id(id); |
1da177e4 LT |
1276 | |
1277 | /* ATA-specific feature tests */ | |
1278 | if (dev->class == ATA_DEV_ATA) { | |
1148c3a7 | 1279 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 1280 | |
1148c3a7 | 1281 | if (ata_id_has_lba(id)) { |
4c2d721a | 1282 | const char *lba_desc; |
8bf62ece | 1283 | |
4c2d721a TH |
1284 | lba_desc = "LBA"; |
1285 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 1286 | if (ata_id_has_lba48(id)) { |
8bf62ece | 1287 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a TH |
1288 | lba_desc = "LBA48"; |
1289 | } | |
8bf62ece AL |
1290 | |
1291 | /* print device info to dmesg */ | |
4c2d721a TH |
1292 | if (print_info) |
1293 | printk(KERN_INFO "ata%u: dev %u ATA-%d, " | |
1294 | "max %s, %Lu sectors: %s\n", | |
1295 | ap->id, dev->devno, | |
1148c3a7 | 1296 | ata_id_major_version(id), |
ff8854b2 | 1297 | ata_mode_string(xfer_mask), |
4c2d721a TH |
1298 | (unsigned long long)dev->n_sectors, |
1299 | lba_desc); | |
ffeae418 | 1300 | } else { |
8bf62ece AL |
1301 | /* CHS */ |
1302 | ||
1303 | /* Default translation */ | |
1148c3a7 TH |
1304 | dev->cylinders = id[1]; |
1305 | dev->heads = id[3]; | |
1306 | dev->sectors = id[6]; | |
8bf62ece | 1307 | |
1148c3a7 | 1308 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 1309 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
1310 | dev->cylinders = id[54]; |
1311 | dev->heads = id[55]; | |
1312 | dev->sectors = id[56]; | |
8bf62ece AL |
1313 | } |
1314 | ||
1315 | /* print device info to dmesg */ | |
4c2d721a TH |
1316 | if (print_info) |
1317 | printk(KERN_INFO "ata%u: dev %u ATA-%d, " | |
1318 | "max %s, %Lu sectors: CHS %u/%u/%u\n", | |
1319 | ap->id, dev->devno, | |
1148c3a7 | 1320 | ata_id_major_version(id), |
ff8854b2 | 1321 | ata_mode_string(xfer_mask), |
4c2d721a TH |
1322 | (unsigned long long)dev->n_sectors, |
1323 | dev->cylinders, dev->heads, dev->sectors); | |
1da177e4 LT |
1324 | } |
1325 | ||
6e7846e9 | 1326 | dev->cdb_len = 16; |
1da177e4 LT |
1327 | } |
1328 | ||
1329 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 1330 | else if (dev->class == ATA_DEV_ATAPI) { |
1148c3a7 | 1331 | rc = atapi_cdb_len(id); |
1da177e4 LT |
1332 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
1333 | printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id); | |
ffeae418 | 1334 | rc = -EINVAL; |
1da177e4 LT |
1335 | goto err_out_nosup; |
1336 | } | |
6e7846e9 | 1337 | dev->cdb_len = (unsigned int) rc; |
1da177e4 LT |
1338 | |
1339 | /* print device info to dmesg */ | |
4c2d721a TH |
1340 | if (print_info) |
1341 | printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n", | |
ff8854b2 | 1342 | ap->id, dev->devno, ata_mode_string(xfer_mask)); |
1da177e4 LT |
1343 | } |
1344 | ||
6e7846e9 TH |
1345 | ap->host->max_cmd_len = 0; |
1346 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1347 | ap->host->max_cmd_len = max_t(unsigned int, | |
1348 | ap->host->max_cmd_len, | |
1349 | ap->device[i].cdb_len); | |
1350 | ||
4b2f3ede TH |
1351 | /* limit bridge transfers to udma5, 200 sectors */ |
1352 | if (ata_dev_knobble(ap, dev)) { | |
4c2d721a TH |
1353 | if (print_info) |
1354 | printk(KERN_INFO "ata%u(%u): applying bridge limits\n", | |
1355 | ap->id, dev->devno); | |
5a529139 | 1356 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
1357 | dev->max_sectors = ATA_MAX_SECTORS; |
1358 | } | |
1359 | ||
1360 | if (ap->ops->dev_config) | |
1361 | ap->ops->dev_config(ap, dev); | |
1362 | ||
1da177e4 | 1363 | DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap)); |
ffeae418 | 1364 | return 0; |
1da177e4 LT |
1365 | |
1366 | err_out_nosup: | |
1da177e4 | 1367 | DPRINTK("EXIT, err\n"); |
ffeae418 | 1368 | return rc; |
1da177e4 LT |
1369 | } |
1370 | ||
1371 | /** | |
1372 | * ata_bus_probe - Reset and probe ATA bus | |
1373 | * @ap: Bus to probe | |
1374 | * | |
0cba632b JG |
1375 | * Master ATA bus probing function. Initiates a hardware-dependent |
1376 | * bus reset, then attempts to identify any devices found on | |
1377 | * the bus. | |
1378 | * | |
1da177e4 | 1379 | * LOCKING: |
0cba632b | 1380 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1381 | * |
1382 | * RETURNS: | |
1383 | * Zero on success, non-zero on error. | |
1384 | */ | |
1385 | ||
1386 | static int ata_bus_probe(struct ata_port *ap) | |
1387 | { | |
28ca5c57 TH |
1388 | unsigned int classes[ATA_MAX_DEVICES]; |
1389 | unsigned int i, rc, found = 0; | |
1da177e4 | 1390 | |
28ca5c57 | 1391 | ata_port_probe(ap); |
c19ba8af | 1392 | |
2044470c TH |
1393 | /* reset and determine device classes */ |
1394 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1395 | classes[i] = ATA_DEV_UNKNOWN; | |
2061a47a | 1396 | |
2044470c | 1397 | if (ap->ops->probe_reset) { |
c19ba8af | 1398 | rc = ap->ops->probe_reset(ap, classes); |
28ca5c57 TH |
1399 | if (rc) { |
1400 | printk("ata%u: reset failed (errno=%d)\n", ap->id, rc); | |
1401 | return rc; | |
c19ba8af | 1402 | } |
28ca5c57 | 1403 | } else { |
c19ba8af TH |
1404 | ap->ops->phy_reset(ap); |
1405 | ||
2044470c TH |
1406 | if (!(ap->flags & ATA_FLAG_PORT_DISABLED)) |
1407 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
28ca5c57 | 1408 | classes[i] = ap->device[i].class; |
2044470c | 1409 | |
28ca5c57 TH |
1410 | ata_port_probe(ap); |
1411 | } | |
1da177e4 | 1412 | |
2044470c TH |
1413 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1414 | if (classes[i] == ATA_DEV_UNKNOWN) | |
1415 | classes[i] = ATA_DEV_NONE; | |
1416 | ||
28ca5c57 | 1417 | /* read IDENTIFY page and configure devices */ |
1da177e4 | 1418 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
ffeae418 TH |
1419 | struct ata_device *dev = &ap->device[i]; |
1420 | ||
28ca5c57 TH |
1421 | dev->class = classes[i]; |
1422 | ||
ffeae418 TH |
1423 | if (!ata_dev_present(dev)) |
1424 | continue; | |
1425 | ||
1426 | WARN_ON(dev->id != NULL); | |
1427 | if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) { | |
1428 | dev->class = ATA_DEV_NONE; | |
1429 | continue; | |
1430 | } | |
1431 | ||
4c2d721a | 1432 | if (ata_dev_configure(ap, dev, 1)) { |
fcef978f | 1433 | ata_dev_disable(ap, dev); |
ffeae418 | 1434 | continue; |
1da177e4 | 1435 | } |
ffeae418 | 1436 | |
ffeae418 | 1437 | found = 1; |
1da177e4 LT |
1438 | } |
1439 | ||
28ca5c57 | 1440 | if (!found) |
1da177e4 LT |
1441 | goto err_out_disable; |
1442 | ||
1443 | ata_set_mode(ap); | |
1444 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1445 | goto err_out_disable; | |
1446 | ||
1447 | return 0; | |
1448 | ||
1449 | err_out_disable: | |
1450 | ap->ops->port_disable(ap); | |
1da177e4 LT |
1451 | return -1; |
1452 | } | |
1453 | ||
1454 | /** | |
0cba632b JG |
1455 | * ata_port_probe - Mark port as enabled |
1456 | * @ap: Port for which we indicate enablement | |
1da177e4 | 1457 | * |
0cba632b JG |
1458 | * Modify @ap data structure such that the system |
1459 | * thinks that the entire port is enabled. | |
1460 | * | |
1461 | * LOCKING: host_set lock, or some other form of | |
1462 | * serialization. | |
1da177e4 LT |
1463 | */ |
1464 | ||
1465 | void ata_port_probe(struct ata_port *ap) | |
1466 | { | |
1467 | ap->flags &= ~ATA_FLAG_PORT_DISABLED; | |
1468 | } | |
1469 | ||
3be680b7 TH |
1470 | /** |
1471 | * sata_print_link_status - Print SATA link status | |
1472 | * @ap: SATA port to printk link status about | |
1473 | * | |
1474 | * This function prints link speed and status of a SATA link. | |
1475 | * | |
1476 | * LOCKING: | |
1477 | * None. | |
1478 | */ | |
1479 | static void sata_print_link_status(struct ata_port *ap) | |
1480 | { | |
1481 | u32 sstatus, tmp; | |
1482 | const char *speed; | |
1483 | ||
1484 | if (!ap->ops->scr_read) | |
1485 | return; | |
1486 | ||
1487 | sstatus = scr_read(ap, SCR_STATUS); | |
1488 | ||
1489 | if (sata_dev_present(ap)) { | |
1490 | tmp = (sstatus >> 4) & 0xf; | |
1491 | if (tmp & (1 << 0)) | |
1492 | speed = "1.5"; | |
1493 | else if (tmp & (1 << 1)) | |
1494 | speed = "3.0"; | |
1495 | else | |
1496 | speed = "<unknown>"; | |
1497 | printk(KERN_INFO "ata%u: SATA link up %s Gbps (SStatus %X)\n", | |
1498 | ap->id, speed, sstatus); | |
1499 | } else { | |
1500 | printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n", | |
1501 | ap->id, sstatus); | |
1502 | } | |
1503 | } | |
1504 | ||
1da177e4 | 1505 | /** |
780a87f7 JG |
1506 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
1507 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1508 | * |
780a87f7 JG |
1509 | * This function issues commands to standard SATA Sxxx |
1510 | * PHY registers, to wake up the phy (and device), and | |
1511 | * clear any reset condition. | |
1da177e4 LT |
1512 | * |
1513 | * LOCKING: | |
0cba632b | 1514 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1515 | * |
1516 | */ | |
1517 | void __sata_phy_reset(struct ata_port *ap) | |
1518 | { | |
1519 | u32 sstatus; | |
1520 | unsigned long timeout = jiffies + (HZ * 5); | |
1521 | ||
1522 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
cdcca89e BR |
1523 | /* issue phy wake/reset */ |
1524 | scr_write_flush(ap, SCR_CONTROL, 0x301); | |
62ba2841 TH |
1525 | /* Couldn't find anything in SATA I/II specs, but |
1526 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
1527 | mdelay(1); | |
1da177e4 | 1528 | } |
cdcca89e | 1529 | scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */ |
1da177e4 LT |
1530 | |
1531 | /* wait for phy to become ready, if necessary */ | |
1532 | do { | |
1533 | msleep(200); | |
1534 | sstatus = scr_read(ap, SCR_STATUS); | |
1535 | if ((sstatus & 0xf) != 1) | |
1536 | break; | |
1537 | } while (time_before(jiffies, timeout)); | |
1538 | ||
3be680b7 TH |
1539 | /* print link status */ |
1540 | sata_print_link_status(ap); | |
656563e3 | 1541 | |
3be680b7 TH |
1542 | /* TODO: phy layer with polling, timeouts, etc. */ |
1543 | if (sata_dev_present(ap)) | |
1da177e4 | 1544 | ata_port_probe(ap); |
3be680b7 | 1545 | else |
1da177e4 | 1546 | ata_port_disable(ap); |
1da177e4 LT |
1547 | |
1548 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1549 | return; | |
1550 | ||
1551 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
1552 | ata_port_disable(ap); | |
1553 | return; | |
1554 | } | |
1555 | ||
1556 | ap->cbl = ATA_CBL_SATA; | |
1557 | } | |
1558 | ||
1559 | /** | |
780a87f7 JG |
1560 | * sata_phy_reset - Reset SATA bus. |
1561 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1562 | * |
780a87f7 JG |
1563 | * This function resets the SATA bus, and then probes |
1564 | * the bus for devices. | |
1da177e4 LT |
1565 | * |
1566 | * LOCKING: | |
0cba632b | 1567 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1568 | * |
1569 | */ | |
1570 | void sata_phy_reset(struct ata_port *ap) | |
1571 | { | |
1572 | __sata_phy_reset(ap); | |
1573 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1574 | return; | |
1575 | ata_bus_reset(ap); | |
1576 | } | |
1577 | ||
ebdfca6e AC |
1578 | /** |
1579 | * ata_dev_pair - return other device on cable | |
1580 | * @ap: port | |
1581 | * @adev: device | |
1582 | * | |
1583 | * Obtain the other device on the same cable, or if none is | |
1584 | * present NULL is returned | |
1585 | */ | |
2e9edbf8 | 1586 | |
ebdfca6e AC |
1587 | struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev) |
1588 | { | |
1589 | struct ata_device *pair = &ap->device[1 - adev->devno]; | |
1590 | if (!ata_dev_present(pair)) | |
1591 | return NULL; | |
1592 | return pair; | |
1593 | } | |
1594 | ||
1da177e4 | 1595 | /** |
780a87f7 JG |
1596 | * ata_port_disable - Disable port. |
1597 | * @ap: Port to be disabled. | |
1da177e4 | 1598 | * |
780a87f7 JG |
1599 | * Modify @ap data structure such that the system |
1600 | * thinks that the entire port is disabled, and should | |
1601 | * never attempt to probe or communicate with devices | |
1602 | * on this port. | |
1603 | * | |
1604 | * LOCKING: host_set lock, or some other form of | |
1605 | * serialization. | |
1da177e4 LT |
1606 | */ |
1607 | ||
1608 | void ata_port_disable(struct ata_port *ap) | |
1609 | { | |
1610 | ap->device[0].class = ATA_DEV_NONE; | |
1611 | ap->device[1].class = ATA_DEV_NONE; | |
1612 | ap->flags |= ATA_FLAG_PORT_DISABLED; | |
1613 | } | |
1614 | ||
452503f9 AC |
1615 | /* |
1616 | * This mode timing computation functionality is ported over from | |
1617 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
1618 | */ | |
1619 | /* | |
1620 | * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). | |
1621 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except | |
1622 | * for PIO 5, which is a nonstandard extension and UDMA6, which | |
2e9edbf8 | 1623 | * is currently supported only by Maxtor drives. |
452503f9 AC |
1624 | */ |
1625 | ||
1626 | static const struct ata_timing ata_timing[] = { | |
1627 | ||
1628 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
1629 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
1630 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
1631 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
1632 | ||
1633 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
1634 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
1635 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
1636 | ||
1637 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2e9edbf8 | 1638 | |
452503f9 AC |
1639 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
1640 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
1641 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2e9edbf8 | 1642 | |
452503f9 AC |
1643 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
1644 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
1645 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
1646 | ||
1647 | /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */ | |
1648 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
1649 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
1650 | ||
1651 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
1652 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
1653 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
1654 | ||
1655 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
1656 | ||
1657 | { 0xFF } | |
1658 | }; | |
1659 | ||
1660 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
1661 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
1662 | ||
1663 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
1664 | { | |
1665 | q->setup = EZ(t->setup * 1000, T); | |
1666 | q->act8b = EZ(t->act8b * 1000, T); | |
1667 | q->rec8b = EZ(t->rec8b * 1000, T); | |
1668 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
1669 | q->active = EZ(t->active * 1000, T); | |
1670 | q->recover = EZ(t->recover * 1000, T); | |
1671 | q->cycle = EZ(t->cycle * 1000, T); | |
1672 | q->udma = EZ(t->udma * 1000, UT); | |
1673 | } | |
1674 | ||
1675 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
1676 | struct ata_timing *m, unsigned int what) | |
1677 | { | |
1678 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
1679 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
1680 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
1681 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
1682 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
1683 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
1684 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
1685 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
1686 | } | |
1687 | ||
1688 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
1689 | { | |
1690 | const struct ata_timing *t; | |
1691 | ||
1692 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 1693 | if (t->mode == 0xFF) |
452503f9 | 1694 | return NULL; |
2e9edbf8 | 1695 | return t; |
452503f9 AC |
1696 | } |
1697 | ||
1698 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
1699 | struct ata_timing *t, int T, int UT) | |
1700 | { | |
1701 | const struct ata_timing *s; | |
1702 | struct ata_timing p; | |
1703 | ||
1704 | /* | |
2e9edbf8 | 1705 | * Find the mode. |
75b1f2f8 | 1706 | */ |
452503f9 AC |
1707 | |
1708 | if (!(s = ata_timing_find_mode(speed))) | |
1709 | return -EINVAL; | |
1710 | ||
75b1f2f8 AL |
1711 | memcpy(t, s, sizeof(*s)); |
1712 | ||
452503f9 AC |
1713 | /* |
1714 | * If the drive is an EIDE drive, it can tell us it needs extended | |
1715 | * PIO/MW_DMA cycle timing. | |
1716 | */ | |
1717 | ||
1718 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
1719 | memset(&p, 0, sizeof(p)); | |
1720 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
1721 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
1722 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
1723 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
1724 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
1725 | } | |
1726 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | * Convert the timing to bus clock counts. | |
1731 | */ | |
1732 | ||
75b1f2f8 | 1733 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
1734 | |
1735 | /* | |
c893a3ae RD |
1736 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
1737 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
1738 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
1739 | */ |
1740 | ||
1741 | if (speed > XFER_PIO_4) { | |
1742 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); | |
1743 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
1744 | } | |
1745 | ||
1746 | /* | |
c893a3ae | 1747 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
1748 | */ |
1749 | ||
1750 | if (t->act8b + t->rec8b < t->cyc8b) { | |
1751 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
1752 | t->rec8b = t->cyc8b - t->act8b; | |
1753 | } | |
1754 | ||
1755 | if (t->active + t->recover < t->cycle) { | |
1756 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
1757 | t->recover = t->cycle - t->active; | |
1758 | } | |
1759 | ||
1760 | return 0; | |
1761 | } | |
1762 | ||
83206a29 | 1763 | static int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev) |
1da177e4 | 1764 | { |
83206a29 TH |
1765 | unsigned int err_mask; |
1766 | int rc; | |
1da177e4 LT |
1767 | |
1768 | if (dev->xfer_shift == ATA_SHIFT_PIO) | |
1769 | dev->flags |= ATA_DFLAG_PIO; | |
1770 | ||
83206a29 TH |
1771 | err_mask = ata_dev_set_xfermode(ap, dev); |
1772 | if (err_mask) { | |
1773 | printk(KERN_ERR | |
1774 | "ata%u: failed to set xfermode (err_mask=0x%x)\n", | |
1775 | ap->id, err_mask); | |
1776 | return -EIO; | |
1777 | } | |
1da177e4 | 1778 | |
83206a29 TH |
1779 | rc = ata_dev_revalidate(ap, dev, 0); |
1780 | if (rc) { | |
1781 | printk(KERN_ERR | |
1782 | "ata%u: failed to revalidate after set xfermode\n", | |
1783 | ap->id); | |
1784 | return rc; | |
48a8a14f TH |
1785 | } |
1786 | ||
23e71c3d TH |
1787 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
1788 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 LT |
1789 | |
1790 | printk(KERN_INFO "ata%u: dev %u configured for %s\n", | |
23e71c3d TH |
1791 | ap->id, dev->devno, |
1792 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
83206a29 | 1793 | return 0; |
1da177e4 LT |
1794 | } |
1795 | ||
1796 | static int ata_host_set_pio(struct ata_port *ap) | |
1797 | { | |
a6d5a51c | 1798 | int i; |
1da177e4 LT |
1799 | |
1800 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
1801 | struct ata_device *dev = &ap->device[i]; | |
a6d5a51c TH |
1802 | |
1803 | if (!ata_dev_present(dev)) | |
1804 | continue; | |
1805 | ||
1806 | if (!dev->pio_mode) { | |
88f93a31 | 1807 | printk(KERN_WARNING "ata%u: no PIO support for device %d.\n", ap->id, i); |
a6d5a51c | 1808 | return -1; |
1da177e4 | 1809 | } |
a6d5a51c TH |
1810 | |
1811 | dev->xfer_mode = dev->pio_mode; | |
1812 | dev->xfer_shift = ATA_SHIFT_PIO; | |
1813 | if (ap->ops->set_piomode) | |
1814 | ap->ops->set_piomode(ap, dev); | |
1da177e4 LT |
1815 | } |
1816 | ||
1817 | return 0; | |
1818 | } | |
1819 | ||
a6d5a51c | 1820 | static void ata_host_set_dma(struct ata_port *ap) |
1da177e4 LT |
1821 | { |
1822 | int i; | |
1823 | ||
1824 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
1825 | struct ata_device *dev = &ap->device[i]; | |
a6d5a51c TH |
1826 | |
1827 | if (!ata_dev_present(dev) || !dev->dma_mode) | |
1828 | continue; | |
1829 | ||
1830 | dev->xfer_mode = dev->dma_mode; | |
1831 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
1832 | if (ap->ops->set_dmamode) | |
1833 | ap->ops->set_dmamode(ap, dev); | |
1da177e4 LT |
1834 | } |
1835 | } | |
1836 | ||
1837 | /** | |
1838 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
1839 | * @ap: port on which timings will be programmed | |
1840 | * | |
780a87f7 JG |
1841 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). |
1842 | * | |
1da177e4 | 1843 | * LOCKING: |
0cba632b | 1844 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1845 | */ |
1846 | static void ata_set_mode(struct ata_port *ap) | |
1847 | { | |
a6d5a51c | 1848 | int i, rc; |
1da177e4 | 1849 | |
a6d5a51c TH |
1850 | /* step 1: calculate xfer_mask */ |
1851 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
1852 | struct ata_device *dev = &ap->device[i]; | |
acf356b1 | 1853 | unsigned int pio_mask, dma_mask; |
a6d5a51c TH |
1854 | |
1855 | if (!ata_dev_present(dev)) | |
1856 | continue; | |
1857 | ||
acf356b1 | 1858 | ata_dev_xfermask(ap, dev); |
1da177e4 | 1859 | |
acf356b1 TH |
1860 | /* TODO: let LLDD filter dev->*_mask here */ |
1861 | ||
1862 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); | |
1863 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
1864 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); | |
1865 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
a6d5a51c TH |
1866 | } |
1867 | ||
1868 | /* step 2: always set host PIO timings */ | |
1869 | rc = ata_host_set_pio(ap); | |
1da177e4 LT |
1870 | if (rc) |
1871 | goto err_out; | |
1872 | ||
a6d5a51c TH |
1873 | /* step 3: set host DMA timings */ |
1874 | ata_host_set_dma(ap); | |
1da177e4 LT |
1875 | |
1876 | /* step 4: update devices' xfer mode */ | |
83206a29 TH |
1877 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
1878 | struct ata_device *dev = &ap->device[i]; | |
1da177e4 | 1879 | |
83206a29 TH |
1880 | if (!ata_dev_present(dev)) |
1881 | continue; | |
1882 | ||
1883 | if (ata_dev_set_mode(ap, dev)) | |
1884 | goto err_out; | |
1885 | } | |
1da177e4 LT |
1886 | |
1887 | if (ap->ops->post_set_mode) | |
1888 | ap->ops->post_set_mode(ap); | |
1889 | ||
1da177e4 LT |
1890 | return; |
1891 | ||
1892 | err_out: | |
1893 | ata_port_disable(ap); | |
1894 | } | |
1895 | ||
1fdffbce JG |
1896 | /** |
1897 | * ata_tf_to_host - issue ATA taskfile to host controller | |
1898 | * @ap: port to which command is being issued | |
1899 | * @tf: ATA taskfile register set | |
1900 | * | |
1901 | * Issues ATA taskfile register set to ATA host controller, | |
1902 | * with proper synchronization with interrupt handler and | |
1903 | * other threads. | |
1904 | * | |
1905 | * LOCKING: | |
1906 | * spin_lock_irqsave(host_set lock) | |
1907 | */ | |
1908 | ||
1909 | static inline void ata_tf_to_host(struct ata_port *ap, | |
1910 | const struct ata_taskfile *tf) | |
1911 | { | |
1912 | ap->ops->tf_load(ap, tf); | |
1913 | ap->ops->exec_command(ap, tf); | |
1914 | } | |
1915 | ||
1da177e4 LT |
1916 | /** |
1917 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
1918 | * @ap: port containing status register to be polled | |
1919 | * @tmout_pat: impatience timeout | |
1920 | * @tmout: overall timeout | |
1921 | * | |
780a87f7 JG |
1922 | * Sleep until ATA Status register bit BSY clears, |
1923 | * or a timeout occurs. | |
1924 | * | |
1925 | * LOCKING: None. | |
1da177e4 LT |
1926 | */ |
1927 | ||
6f8b9958 TH |
1928 | unsigned int ata_busy_sleep (struct ata_port *ap, |
1929 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
1930 | { |
1931 | unsigned long timer_start, timeout; | |
1932 | u8 status; | |
1933 | ||
1934 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
1935 | timer_start = jiffies; | |
1936 | timeout = timer_start + tmout_pat; | |
1937 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
1938 | msleep(50); | |
1939 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
1940 | } | |
1941 | ||
1942 | if (status & ATA_BUSY) | |
1943 | printk(KERN_WARNING "ata%u is slow to respond, " | |
1944 | "please be patient\n", ap->id); | |
1945 | ||
1946 | timeout = timer_start + tmout; | |
1947 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
1948 | msleep(50); | |
1949 | status = ata_chk_status(ap); | |
1950 | } | |
1951 | ||
1952 | if (status & ATA_BUSY) { | |
1953 | printk(KERN_ERR "ata%u failed to respond (%lu secs)\n", | |
1954 | ap->id, tmout / HZ); | |
1955 | return 1; | |
1956 | } | |
1957 | ||
1958 | return 0; | |
1959 | } | |
1960 | ||
1961 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) | |
1962 | { | |
1963 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
1964 | unsigned int dev0 = devmask & (1 << 0); | |
1965 | unsigned int dev1 = devmask & (1 << 1); | |
1966 | unsigned long timeout; | |
1967 | ||
1968 | /* if device 0 was found in ata_devchk, wait for its | |
1969 | * BSY bit to clear | |
1970 | */ | |
1971 | if (dev0) | |
1972 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
1973 | ||
1974 | /* if device 1 was found in ata_devchk, wait for | |
1975 | * register access, then wait for BSY to clear | |
1976 | */ | |
1977 | timeout = jiffies + ATA_TMOUT_BOOT; | |
1978 | while (dev1) { | |
1979 | u8 nsect, lbal; | |
1980 | ||
1981 | ap->ops->dev_select(ap, 1); | |
1982 | if (ap->flags & ATA_FLAG_MMIO) { | |
1983 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
1984 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
1985 | } else { | |
1986 | nsect = inb(ioaddr->nsect_addr); | |
1987 | lbal = inb(ioaddr->lbal_addr); | |
1988 | } | |
1989 | if ((nsect == 1) && (lbal == 1)) | |
1990 | break; | |
1991 | if (time_after(jiffies, timeout)) { | |
1992 | dev1 = 0; | |
1993 | break; | |
1994 | } | |
1995 | msleep(50); /* give drive a breather */ | |
1996 | } | |
1997 | if (dev1) | |
1998 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
1999 | ||
2000 | /* is all this really necessary? */ | |
2001 | ap->ops->dev_select(ap, 0); | |
2002 | if (dev1) | |
2003 | ap->ops->dev_select(ap, 1); | |
2004 | if (dev0) | |
2005 | ap->ops->dev_select(ap, 0); | |
2006 | } | |
2007 | ||
2008 | /** | |
0cba632b JG |
2009 | * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command. |
2010 | * @ap: Port to reset and probe | |
2011 | * | |
2012 | * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and | |
2013 | * probe the bus. Not often used these days. | |
1da177e4 LT |
2014 | * |
2015 | * LOCKING: | |
0cba632b | 2016 | * PCI/etc. bus probe sem. |
e5338254 | 2017 | * Obtains host_set lock. |
1da177e4 LT |
2018 | * |
2019 | */ | |
2020 | ||
2021 | static unsigned int ata_bus_edd(struct ata_port *ap) | |
2022 | { | |
2023 | struct ata_taskfile tf; | |
e5338254 | 2024 | unsigned long flags; |
1da177e4 LT |
2025 | |
2026 | /* set up execute-device-diag (bus reset) taskfile */ | |
2027 | /* also, take interrupts to a known state (disabled) */ | |
2028 | DPRINTK("execute-device-diag\n"); | |
2029 | ata_tf_init(ap, &tf, 0); | |
2030 | tf.ctl |= ATA_NIEN; | |
2031 | tf.command = ATA_CMD_EDD; | |
2032 | tf.protocol = ATA_PROT_NODATA; | |
2033 | ||
2034 | /* do bus reset */ | |
e5338254 | 2035 | spin_lock_irqsave(&ap->host_set->lock, flags); |
1da177e4 | 2036 | ata_tf_to_host(ap, &tf); |
e5338254 | 2037 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
1da177e4 LT |
2038 | |
2039 | /* spec says at least 2ms. but who knows with those | |
2040 | * crazy ATAPI devices... | |
2041 | */ | |
2042 | msleep(150); | |
2043 | ||
2044 | return ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2045 | } | |
2046 | ||
2047 | static unsigned int ata_bus_softreset(struct ata_port *ap, | |
2048 | unsigned int devmask) | |
2049 | { | |
2050 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2051 | ||
2052 | DPRINTK("ata%u: bus reset via SRST\n", ap->id); | |
2053 | ||
2054 | /* software reset. causes dev0 to be selected */ | |
2055 | if (ap->flags & ATA_FLAG_MMIO) { | |
2056 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2057 | udelay(20); /* FIXME: flush */ | |
2058 | writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr); | |
2059 | udelay(20); /* FIXME: flush */ | |
2060 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2061 | } else { | |
2062 | outb(ap->ctl, ioaddr->ctl_addr); | |
2063 | udelay(10); | |
2064 | outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
2065 | udelay(10); | |
2066 | outb(ap->ctl, ioaddr->ctl_addr); | |
2067 | } | |
2068 | ||
2069 | /* spec mandates ">= 2ms" before checking status. | |
2070 | * We wait 150ms, because that was the magic delay used for | |
2071 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
2072 | * between when the ATA command register is written, and then | |
2073 | * status is checked. Because waiting for "a while" before | |
2074 | * checking status is fine, post SRST, we perform this magic | |
2075 | * delay here as well. | |
09c7ad79 AC |
2076 | * |
2077 | * Old drivers/ide uses the 2mS rule and then waits for ready | |
1da177e4 LT |
2078 | */ |
2079 | msleep(150); | |
2080 | ||
2e9edbf8 JG |
2081 | |
2082 | /* Before we perform post reset processing we want to see if | |
09c7ad79 AC |
2083 | the bus shows 0xFF because the odd clown forgets the D7 pulldown |
2084 | resistor */ | |
2e9edbf8 | 2085 | |
09c7ad79 AC |
2086 | if (ata_check_status(ap) == 0xFF) |
2087 | return 1; /* Positive is failure for some reason */ | |
2088 | ||
1da177e4 LT |
2089 | ata_bus_post_reset(ap, devmask); |
2090 | ||
2091 | return 0; | |
2092 | } | |
2093 | ||
2094 | /** | |
2095 | * ata_bus_reset - reset host port and associated ATA channel | |
2096 | * @ap: port to reset | |
2097 | * | |
2098 | * This is typically the first time we actually start issuing | |
2099 | * commands to the ATA channel. We wait for BSY to clear, then | |
2100 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
2101 | * result. Determine what devices, if any, are on the channel | |
2102 | * by looking at the device 0/1 error register. Look at the signature | |
2103 | * stored in each device's taskfile registers, to determine if | |
2104 | * the device is ATA or ATAPI. | |
2105 | * | |
2106 | * LOCKING: | |
0cba632b JG |
2107 | * PCI/etc. bus probe sem. |
2108 | * Obtains host_set lock. | |
1da177e4 LT |
2109 | * |
2110 | * SIDE EFFECTS: | |
2111 | * Sets ATA_FLAG_PORT_DISABLED if bus reset fails. | |
2112 | */ | |
2113 | ||
2114 | void ata_bus_reset(struct ata_port *ap) | |
2115 | { | |
2116 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2117 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2118 | u8 err; | |
2119 | unsigned int dev0, dev1 = 0, rc = 0, devmask = 0; | |
2120 | ||
2121 | DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); | |
2122 | ||
2123 | /* determine if device 0/1 are present */ | |
2124 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
2125 | dev0 = 1; | |
2126 | else { | |
2127 | dev0 = ata_devchk(ap, 0); | |
2128 | if (slave_possible) | |
2129 | dev1 = ata_devchk(ap, 1); | |
2130 | } | |
2131 | ||
2132 | if (dev0) | |
2133 | devmask |= (1 << 0); | |
2134 | if (dev1) | |
2135 | devmask |= (1 << 1); | |
2136 | ||
2137 | /* select device 0 again */ | |
2138 | ap->ops->dev_select(ap, 0); | |
2139 | ||
2140 | /* issue bus reset */ | |
2141 | if (ap->flags & ATA_FLAG_SRST) | |
2142 | rc = ata_bus_softreset(ap, devmask); | |
2143 | else if ((ap->flags & ATA_FLAG_SATA_RESET) == 0) { | |
2144 | /* set up device control */ | |
2145 | if (ap->flags & ATA_FLAG_MMIO) | |
2146 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2147 | else | |
2148 | outb(ap->ctl, ioaddr->ctl_addr); | |
2149 | rc = ata_bus_edd(ap); | |
2150 | } | |
2151 | ||
2152 | if (rc) | |
2153 | goto err_out; | |
2154 | ||
2155 | /* | |
2156 | * determine by signature whether we have ATA or ATAPI devices | |
2157 | */ | |
b4dc7623 | 2158 | ap->device[0].class = ata_dev_try_classify(ap, 0, &err); |
1da177e4 | 2159 | if ((slave_possible) && (err != 0x81)) |
b4dc7623 | 2160 | ap->device[1].class = ata_dev_try_classify(ap, 1, &err); |
1da177e4 LT |
2161 | |
2162 | /* re-enable interrupts */ | |
2163 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ | |
2164 | ata_irq_on(ap); | |
2165 | ||
2166 | /* is double-select really necessary? */ | |
2167 | if (ap->device[1].class != ATA_DEV_NONE) | |
2168 | ap->ops->dev_select(ap, 1); | |
2169 | if (ap->device[0].class != ATA_DEV_NONE) | |
2170 | ap->ops->dev_select(ap, 0); | |
2171 | ||
2172 | /* if no devices were detected, disable this port */ | |
2173 | if ((ap->device[0].class == ATA_DEV_NONE) && | |
2174 | (ap->device[1].class == ATA_DEV_NONE)) | |
2175 | goto err_out; | |
2176 | ||
2177 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
2178 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
2179 | if (ap->flags & ATA_FLAG_MMIO) | |
2180 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2181 | else | |
2182 | outb(ap->ctl, ioaddr->ctl_addr); | |
2183 | } | |
2184 | ||
2185 | DPRINTK("EXIT\n"); | |
2186 | return; | |
2187 | ||
2188 | err_out: | |
2189 | printk(KERN_ERR "ata%u: disabling port\n", ap->id); | |
2190 | ap->ops->port_disable(ap); | |
2191 | ||
2192 | DPRINTK("EXIT\n"); | |
2193 | } | |
2194 | ||
7a7921e8 TH |
2195 | static int sata_phy_resume(struct ata_port *ap) |
2196 | { | |
2197 | unsigned long timeout = jiffies + (HZ * 5); | |
2198 | u32 sstatus; | |
2199 | ||
2200 | scr_write_flush(ap, SCR_CONTROL, 0x300); | |
2201 | ||
2202 | /* Wait for phy to become ready, if necessary. */ | |
2203 | do { | |
2204 | msleep(200); | |
2205 | sstatus = scr_read(ap, SCR_STATUS); | |
2206 | if ((sstatus & 0xf) != 1) | |
2207 | return 0; | |
2208 | } while (time_before(jiffies, timeout)); | |
2209 | ||
2210 | return -1; | |
2211 | } | |
2212 | ||
8a19ac89 TH |
2213 | /** |
2214 | * ata_std_probeinit - initialize probing | |
2215 | * @ap: port to be probed | |
2216 | * | |
2217 | * @ap is about to be probed. Initialize it. This function is | |
2218 | * to be used as standard callback for ata_drive_probe_reset(). | |
3a39746a TH |
2219 | * |
2220 | * NOTE!!! Do not use this function as probeinit if a low level | |
2221 | * driver implements only hardreset. Just pass NULL as probeinit | |
2222 | * in that case. Using this function is probably okay but doing | |
2223 | * so makes reset sequence different from the original | |
2224 | * ->phy_reset implementation and Jeff nervous. :-P | |
8a19ac89 TH |
2225 | */ |
2226 | extern void ata_std_probeinit(struct ata_port *ap) | |
2227 | { | |
3a39746a | 2228 | if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) { |
8a19ac89 | 2229 | sata_phy_resume(ap); |
3a39746a TH |
2230 | if (sata_dev_present(ap)) |
2231 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2232 | } | |
8a19ac89 TH |
2233 | } |
2234 | ||
c2bd5804 TH |
2235 | /** |
2236 | * ata_std_softreset - reset host port via ATA SRST | |
2237 | * @ap: port to reset | |
2238 | * @verbose: fail verbosely | |
2239 | * @classes: resulting classes of attached devices | |
2240 | * | |
2241 | * Reset host port using ATA SRST. This function is to be used | |
2242 | * as standard callback for ata_drive_*_reset() functions. | |
2243 | * | |
2244 | * LOCKING: | |
2245 | * Kernel thread context (may sleep) | |
2246 | * | |
2247 | * RETURNS: | |
2248 | * 0 on success, -errno otherwise. | |
2249 | */ | |
2250 | int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) | |
2251 | { | |
2252 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2253 | unsigned int devmask = 0, err_mask; | |
2254 | u8 err; | |
2255 | ||
2256 | DPRINTK("ENTER\n"); | |
2257 | ||
3a39746a TH |
2258 | if (ap->ops->scr_read && !sata_dev_present(ap)) { |
2259 | classes[0] = ATA_DEV_NONE; | |
2260 | goto out; | |
2261 | } | |
2262 | ||
c2bd5804 TH |
2263 | /* determine if device 0/1 are present */ |
2264 | if (ata_devchk(ap, 0)) | |
2265 | devmask |= (1 << 0); | |
2266 | if (slave_possible && ata_devchk(ap, 1)) | |
2267 | devmask |= (1 << 1); | |
2268 | ||
c2bd5804 TH |
2269 | /* select device 0 again */ |
2270 | ap->ops->dev_select(ap, 0); | |
2271 | ||
2272 | /* issue bus reset */ | |
2273 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
2274 | err_mask = ata_bus_softreset(ap, devmask); | |
2275 | if (err_mask) { | |
2276 | if (verbose) | |
2277 | printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n", | |
2278 | ap->id, err_mask); | |
2279 | else | |
2280 | DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n", | |
2281 | err_mask); | |
2282 | return -EIO; | |
2283 | } | |
2284 | ||
2285 | /* determine by signature whether we have ATA or ATAPI devices */ | |
2286 | classes[0] = ata_dev_try_classify(ap, 0, &err); | |
2287 | if (slave_possible && err != 0x81) | |
2288 | classes[1] = ata_dev_try_classify(ap, 1, &err); | |
2289 | ||
3a39746a | 2290 | out: |
c2bd5804 TH |
2291 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
2292 | return 0; | |
2293 | } | |
2294 | ||
2295 | /** | |
2296 | * sata_std_hardreset - reset host port via SATA phy reset | |
2297 | * @ap: port to reset | |
2298 | * @verbose: fail verbosely | |
2299 | * @class: resulting class of attached device | |
2300 | * | |
2301 | * SATA phy-reset host port using DET bits of SControl register. | |
2302 | * This function is to be used as standard callback for | |
2303 | * ata_drive_*_reset(). | |
2304 | * | |
2305 | * LOCKING: | |
2306 | * Kernel thread context (may sleep) | |
2307 | * | |
2308 | * RETURNS: | |
2309 | * 0 on success, -errno otherwise. | |
2310 | */ | |
2311 | int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class) | |
2312 | { | |
c2bd5804 TH |
2313 | DPRINTK("ENTER\n"); |
2314 | ||
2315 | /* Issue phy wake/reset */ | |
2316 | scr_write_flush(ap, SCR_CONTROL, 0x301); | |
2317 | ||
2318 | /* | |
2319 | * Couldn't find anything in SATA I/II specs, but AHCI-1.1 | |
2320 | * 10.4.2 says at least 1 ms. | |
2321 | */ | |
2322 | msleep(1); | |
2323 | ||
7a7921e8 TH |
2324 | /* Bring phy back */ |
2325 | sata_phy_resume(ap); | |
c2bd5804 | 2326 | |
c2bd5804 TH |
2327 | /* TODO: phy layer with polling, timeouts, etc. */ |
2328 | if (!sata_dev_present(ap)) { | |
2329 | *class = ATA_DEV_NONE; | |
2330 | DPRINTK("EXIT, link offline\n"); | |
2331 | return 0; | |
2332 | } | |
2333 | ||
2334 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
2335 | if (verbose) | |
2336 | printk(KERN_ERR "ata%u: COMRESET failed " | |
2337 | "(device not ready)\n", ap->id); | |
2338 | else | |
2339 | DPRINTK("EXIT, device not ready\n"); | |
2340 | return -EIO; | |
2341 | } | |
2342 | ||
3a39746a TH |
2343 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
2344 | ||
c2bd5804 TH |
2345 | *class = ata_dev_try_classify(ap, 0, NULL); |
2346 | ||
2347 | DPRINTK("EXIT, class=%u\n", *class); | |
2348 | return 0; | |
2349 | } | |
2350 | ||
2351 | /** | |
2352 | * ata_std_postreset - standard postreset callback | |
2353 | * @ap: the target ata_port | |
2354 | * @classes: classes of attached devices | |
2355 | * | |
2356 | * This function is invoked after a successful reset. Note that | |
2357 | * the device might have been reset more than once using | |
2358 | * different reset methods before postreset is invoked. | |
c2bd5804 TH |
2359 | * |
2360 | * This function is to be used as standard callback for | |
2361 | * ata_drive_*_reset(). | |
2362 | * | |
2363 | * LOCKING: | |
2364 | * Kernel thread context (may sleep) | |
2365 | */ | |
2366 | void ata_std_postreset(struct ata_port *ap, unsigned int *classes) | |
2367 | { | |
2368 | DPRINTK("ENTER\n"); | |
2369 | ||
56497bd5 | 2370 | /* set cable type if it isn't already set */ |
c2bd5804 TH |
2371 | if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA) |
2372 | ap->cbl = ATA_CBL_SATA; | |
2373 | ||
2374 | /* print link status */ | |
2375 | if (ap->cbl == ATA_CBL_SATA) | |
2376 | sata_print_link_status(ap); | |
2377 | ||
3a39746a TH |
2378 | /* re-enable interrupts */ |
2379 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ | |
2380 | ata_irq_on(ap); | |
c2bd5804 TH |
2381 | |
2382 | /* is double-select really necessary? */ | |
2383 | if (classes[0] != ATA_DEV_NONE) | |
2384 | ap->ops->dev_select(ap, 1); | |
2385 | if (classes[1] != ATA_DEV_NONE) | |
2386 | ap->ops->dev_select(ap, 0); | |
2387 | ||
3a39746a TH |
2388 | /* bail out if no device is present */ |
2389 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
2390 | DPRINTK("EXIT, no device\n"); | |
2391 | return; | |
2392 | } | |
2393 | ||
2394 | /* set up device control */ | |
2395 | if (ap->ioaddr.ctl_addr) { | |
2396 | if (ap->flags & ATA_FLAG_MMIO) | |
2397 | writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr); | |
2398 | else | |
2399 | outb(ap->ctl, ap->ioaddr.ctl_addr); | |
2400 | } | |
c2bd5804 TH |
2401 | |
2402 | DPRINTK("EXIT\n"); | |
2403 | } | |
2404 | ||
2405 | /** | |
2406 | * ata_std_probe_reset - standard probe reset method | |
2407 | * @ap: prot to perform probe-reset | |
2408 | * @classes: resulting classes of attached devices | |
2409 | * | |
2410 | * The stock off-the-shelf ->probe_reset method. | |
2411 | * | |
2412 | * LOCKING: | |
2413 | * Kernel thread context (may sleep) | |
2414 | * | |
2415 | * RETURNS: | |
2416 | * 0 on success, -errno otherwise. | |
2417 | */ | |
2418 | int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes) | |
2419 | { | |
2420 | ata_reset_fn_t hardreset; | |
2421 | ||
2422 | hardreset = NULL; | |
b911fc3a | 2423 | if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) |
c2bd5804 TH |
2424 | hardreset = sata_std_hardreset; |
2425 | ||
8a19ac89 | 2426 | return ata_drive_probe_reset(ap, ata_std_probeinit, |
7944ea95 | 2427 | ata_std_softreset, hardreset, |
c2bd5804 TH |
2428 | ata_std_postreset, classes); |
2429 | } | |
2430 | ||
a62c0fc5 TH |
2431 | static int do_probe_reset(struct ata_port *ap, ata_reset_fn_t reset, |
2432 | ata_postreset_fn_t postreset, | |
2433 | unsigned int *classes) | |
2434 | { | |
2435 | int i, rc; | |
2436 | ||
2437 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2438 | classes[i] = ATA_DEV_UNKNOWN; | |
2439 | ||
2440 | rc = reset(ap, 0, classes); | |
2441 | if (rc) | |
2442 | return rc; | |
2443 | ||
2444 | /* If any class isn't ATA_DEV_UNKNOWN, consider classification | |
2445 | * is complete and convert all ATA_DEV_UNKNOWN to | |
2446 | * ATA_DEV_NONE. | |
2447 | */ | |
2448 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2449 | if (classes[i] != ATA_DEV_UNKNOWN) | |
2450 | break; | |
2451 | ||
2452 | if (i < ATA_MAX_DEVICES) | |
2453 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2454 | if (classes[i] == ATA_DEV_UNKNOWN) | |
2455 | classes[i] = ATA_DEV_NONE; | |
2456 | ||
2457 | if (postreset) | |
2458 | postreset(ap, classes); | |
2459 | ||
2460 | return classes[0] != ATA_DEV_UNKNOWN ? 0 : -ENODEV; | |
2461 | } | |
2462 | ||
2463 | /** | |
2464 | * ata_drive_probe_reset - Perform probe reset with given methods | |
2465 | * @ap: port to reset | |
7944ea95 | 2466 | * @probeinit: probeinit method (can be NULL) |
a62c0fc5 TH |
2467 | * @softreset: softreset method (can be NULL) |
2468 | * @hardreset: hardreset method (can be NULL) | |
2469 | * @postreset: postreset method (can be NULL) | |
2470 | * @classes: resulting classes of attached devices | |
2471 | * | |
2472 | * Reset the specified port and classify attached devices using | |
2473 | * given methods. This function prefers softreset but tries all | |
2474 | * possible reset sequences to reset and classify devices. This | |
2475 | * function is intended to be used for constructing ->probe_reset | |
2476 | * callback by low level drivers. | |
2477 | * | |
2478 | * Reset methods should follow the following rules. | |
2479 | * | |
2480 | * - Return 0 on sucess, -errno on failure. | |
2481 | * - If classification is supported, fill classes[] with | |
2482 | * recognized class codes. | |
2483 | * - If classification is not supported, leave classes[] alone. | |
2484 | * - If verbose is non-zero, print error message on failure; | |
2485 | * otherwise, shut up. | |
2486 | * | |
2487 | * LOCKING: | |
2488 | * Kernel thread context (may sleep) | |
2489 | * | |
2490 | * RETURNS: | |
2491 | * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV | |
2492 | * if classification fails, and any error code from reset | |
2493 | * methods. | |
2494 | */ | |
7944ea95 | 2495 | int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit, |
a62c0fc5 TH |
2496 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
2497 | ata_postreset_fn_t postreset, unsigned int *classes) | |
2498 | { | |
2499 | int rc = -EINVAL; | |
2500 | ||
7944ea95 TH |
2501 | if (probeinit) |
2502 | probeinit(ap); | |
2503 | ||
a62c0fc5 TH |
2504 | if (softreset) { |
2505 | rc = do_probe_reset(ap, softreset, postreset, classes); | |
2506 | if (rc == 0) | |
2507 | return 0; | |
2508 | } | |
2509 | ||
2510 | if (!hardreset) | |
2511 | return rc; | |
2512 | ||
2513 | rc = do_probe_reset(ap, hardreset, postreset, classes); | |
2514 | if (rc == 0 || rc != -ENODEV) | |
2515 | return rc; | |
2516 | ||
2517 | if (softreset) | |
2518 | rc = do_probe_reset(ap, softreset, postreset, classes); | |
2519 | ||
2520 | return rc; | |
2521 | } | |
2522 | ||
623a3128 TH |
2523 | /** |
2524 | * ata_dev_same_device - Determine whether new ID matches configured device | |
2525 | * @ap: port on which the device to compare against resides | |
2526 | * @dev: device to compare against | |
2527 | * @new_class: class of the new device | |
2528 | * @new_id: IDENTIFY page of the new device | |
2529 | * | |
2530 | * Compare @new_class and @new_id against @dev and determine | |
2531 | * whether @dev is the device indicated by @new_class and | |
2532 | * @new_id. | |
2533 | * | |
2534 | * LOCKING: | |
2535 | * None. | |
2536 | * | |
2537 | * RETURNS: | |
2538 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
2539 | */ | |
2540 | static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev, | |
2541 | unsigned int new_class, const u16 *new_id) | |
2542 | { | |
2543 | const u16 *old_id = dev->id; | |
2544 | unsigned char model[2][41], serial[2][21]; | |
2545 | u64 new_n_sectors; | |
2546 | ||
2547 | if (dev->class != new_class) { | |
2548 | printk(KERN_INFO | |
2549 | "ata%u: dev %u class mismatch %d != %d\n", | |
2550 | ap->id, dev->devno, dev->class, new_class); | |
2551 | return 0; | |
2552 | } | |
2553 | ||
2554 | ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0])); | |
2555 | ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1])); | |
2556 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0])); | |
2557 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1])); | |
2558 | new_n_sectors = ata_id_n_sectors(new_id); | |
2559 | ||
2560 | if (strcmp(model[0], model[1])) { | |
2561 | printk(KERN_INFO | |
2562 | "ata%u: dev %u model number mismatch '%s' != '%s'\n", | |
2563 | ap->id, dev->devno, model[0], model[1]); | |
2564 | return 0; | |
2565 | } | |
2566 | ||
2567 | if (strcmp(serial[0], serial[1])) { | |
2568 | printk(KERN_INFO | |
2569 | "ata%u: dev %u serial number mismatch '%s' != '%s'\n", | |
2570 | ap->id, dev->devno, serial[0], serial[1]); | |
2571 | return 0; | |
2572 | } | |
2573 | ||
2574 | if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { | |
2575 | printk(KERN_INFO | |
2576 | "ata%u: dev %u n_sectors mismatch %llu != %llu\n", | |
2577 | ap->id, dev->devno, (unsigned long long)dev->n_sectors, | |
2578 | (unsigned long long)new_n_sectors); | |
2579 | return 0; | |
2580 | } | |
2581 | ||
2582 | return 1; | |
2583 | } | |
2584 | ||
2585 | /** | |
2586 | * ata_dev_revalidate - Revalidate ATA device | |
2587 | * @ap: port on which the device to revalidate resides | |
2588 | * @dev: device to revalidate | |
2589 | * @post_reset: is this revalidation after reset? | |
2590 | * | |
2591 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
2592 | * the port. | |
2593 | * | |
2594 | * LOCKING: | |
2595 | * Kernel thread context (may sleep) | |
2596 | * | |
2597 | * RETURNS: | |
2598 | * 0 on success, negative errno otherwise | |
2599 | */ | |
2600 | int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev, | |
2601 | int post_reset) | |
2602 | { | |
2603 | unsigned int class; | |
2604 | u16 *id; | |
2605 | int rc; | |
2606 | ||
2607 | if (!ata_dev_present(dev)) | |
2608 | return -ENODEV; | |
2609 | ||
2610 | class = dev->class; | |
2611 | id = NULL; | |
2612 | ||
2613 | /* allocate & read ID data */ | |
2614 | rc = ata_dev_read_id(ap, dev, &class, post_reset, &id); | |
2615 | if (rc) | |
2616 | goto fail; | |
2617 | ||
2618 | /* is the device still there? */ | |
2619 | if (!ata_dev_same_device(ap, dev, class, id)) { | |
2620 | rc = -ENODEV; | |
2621 | goto fail; | |
2622 | } | |
2623 | ||
2624 | kfree(dev->id); | |
2625 | dev->id = id; | |
2626 | ||
2627 | /* configure device according to the new ID */ | |
2628 | return ata_dev_configure(ap, dev, 0); | |
2629 | ||
2630 | fail: | |
2631 | printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n", | |
2632 | ap->id, dev->devno, rc); | |
2633 | kfree(id); | |
2634 | return rc; | |
2635 | } | |
2636 | ||
98ac62de | 2637 | static const char * const ata_dma_blacklist [] = { |
f4b15fef AC |
2638 | "WDC AC11000H", NULL, |
2639 | "WDC AC22100H", NULL, | |
2640 | "WDC AC32500H", NULL, | |
2641 | "WDC AC33100H", NULL, | |
2642 | "WDC AC31600H", NULL, | |
2643 | "WDC AC32100H", "24.09P07", | |
2644 | "WDC AC23200L", "21.10N21", | |
2645 | "Compaq CRD-8241B", NULL, | |
2646 | "CRD-8400B", NULL, | |
2647 | "CRD-8480B", NULL, | |
2648 | "CRD-8482B", NULL, | |
2649 | "CRD-84", NULL, | |
2650 | "SanDisk SDP3B", NULL, | |
2651 | "SanDisk SDP3B-64", NULL, | |
2652 | "SANYO CD-ROM CRD", NULL, | |
2653 | "HITACHI CDR-8", NULL, | |
2e9edbf8 | 2654 | "HITACHI CDR-8335", NULL, |
f4b15fef | 2655 | "HITACHI CDR-8435", NULL, |
2e9edbf8 JG |
2656 | "Toshiba CD-ROM XM-6202B", NULL, |
2657 | "TOSHIBA CD-ROM XM-1702BC", NULL, | |
2658 | "CD-532E-A", NULL, | |
2659 | "E-IDE CD-ROM CR-840", NULL, | |
2660 | "CD-ROM Drive/F5A", NULL, | |
2661 | "WPI CDD-820", NULL, | |
f4b15fef | 2662 | "SAMSUNG CD-ROM SC-148C", NULL, |
2e9edbf8 | 2663 | "SAMSUNG CD-ROM SC", NULL, |
f4b15fef AC |
2664 | "SanDisk SDP3B-64", NULL, |
2665 | "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL, | |
2666 | "_NEC DV5800A", NULL, | |
2667 | "SAMSUNG CD-ROM SN-124", "N001" | |
1da177e4 | 2668 | }; |
2e9edbf8 | 2669 | |
f4b15fef AC |
2670 | static int ata_strim(char *s, size_t len) |
2671 | { | |
2672 | len = strnlen(s, len); | |
2673 | ||
2674 | /* ATAPI specifies that empty space is blank-filled; remove blanks */ | |
2675 | while ((len > 0) && (s[len - 1] == ' ')) { | |
2676 | len--; | |
2677 | s[len] = 0; | |
2678 | } | |
2679 | return len; | |
2680 | } | |
1da177e4 | 2681 | |
057ace5e | 2682 | static int ata_dma_blacklisted(const struct ata_device *dev) |
1da177e4 | 2683 | { |
f4b15fef AC |
2684 | unsigned char model_num[40]; |
2685 | unsigned char model_rev[16]; | |
2686 | unsigned int nlen, rlen; | |
1da177e4 LT |
2687 | int i; |
2688 | ||
f4b15fef AC |
2689 | ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS, |
2690 | sizeof(model_num)); | |
2691 | ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS, | |
2692 | sizeof(model_rev)); | |
2693 | nlen = ata_strim(model_num, sizeof(model_num)); | |
2694 | rlen = ata_strim(model_rev, sizeof(model_rev)); | |
1da177e4 | 2695 | |
f4b15fef AC |
2696 | for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) { |
2697 | if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) { | |
2698 | if (ata_dma_blacklist[i+1] == NULL) | |
2699 | return 1; | |
2700 | if (!strncmp(ata_dma_blacklist[i], model_rev, rlen)) | |
2701 | return 1; | |
2702 | } | |
2703 | } | |
1da177e4 LT |
2704 | return 0; |
2705 | } | |
2706 | ||
a6d5a51c TH |
2707 | /** |
2708 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
2709 | * @ap: Port on which the device to compute xfermask for resides | |
2710 | * @dev: Device to compute xfermask for | |
2711 | * | |
acf356b1 TH |
2712 | * Compute supported xfermask of @dev and store it in |
2713 | * dev->*_mask. This function is responsible for applying all | |
2714 | * known limits including host controller limits, device | |
2715 | * blacklist, etc... | |
a6d5a51c TH |
2716 | * |
2717 | * LOCKING: | |
2718 | * None. | |
a6d5a51c | 2719 | */ |
acf356b1 | 2720 | static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev) |
1da177e4 | 2721 | { |
a6d5a51c TH |
2722 | unsigned long xfer_mask; |
2723 | int i; | |
1da177e4 | 2724 | |
a6d5a51c TH |
2725 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
2726 | ap->udma_mask); | |
1da177e4 | 2727 | |
a6d5a51c TH |
2728 | /* use port-wide xfermask for now */ |
2729 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
2730 | struct ata_device *d = &ap->device[i]; | |
2731 | if (!ata_dev_present(d)) | |
2732 | continue; | |
acf356b1 TH |
2733 | xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask, |
2734 | d->udma_mask); | |
a6d5a51c TH |
2735 | xfer_mask &= ata_id_xfermask(d->id); |
2736 | if (ata_dma_blacklisted(d)) | |
2737 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
1da177e4 LT |
2738 | } |
2739 | ||
a6d5a51c TH |
2740 | if (ata_dma_blacklisted(dev)) |
2741 | printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, " | |
2742 | "disabling DMA\n", ap->id, dev->devno); | |
2743 | ||
acf356b1 TH |
2744 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, |
2745 | &dev->udma_mask); | |
1da177e4 LT |
2746 | } |
2747 | ||
1da177e4 LT |
2748 | /** |
2749 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
2750 | * @ap: Port associated with device @dev | |
2751 | * @dev: Device to which command will be sent | |
2752 | * | |
780a87f7 JG |
2753 | * Issue SET FEATURES - XFER MODE command to device @dev |
2754 | * on port @ap. | |
2755 | * | |
1da177e4 | 2756 | * LOCKING: |
0cba632b | 2757 | * PCI/etc. bus probe sem. |
83206a29 TH |
2758 | * |
2759 | * RETURNS: | |
2760 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
2761 | */ |
2762 | ||
83206a29 TH |
2763 | static unsigned int ata_dev_set_xfermode(struct ata_port *ap, |
2764 | struct ata_device *dev) | |
1da177e4 | 2765 | { |
a0123703 | 2766 | struct ata_taskfile tf; |
83206a29 | 2767 | unsigned int err_mask; |
1da177e4 LT |
2768 | |
2769 | /* set up set-features taskfile */ | |
2770 | DPRINTK("set features - xfer mode\n"); | |
2771 | ||
a0123703 TH |
2772 | ata_tf_init(ap, &tf, dev->devno); |
2773 | tf.command = ATA_CMD_SET_FEATURES; | |
2774 | tf.feature = SETFEATURES_XFER; | |
2775 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2776 | tf.protocol = ATA_PROT_NODATA; | |
2777 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 2778 | |
83206a29 | 2779 | err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); |
1da177e4 | 2780 | |
83206a29 TH |
2781 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
2782 | return err_mask; | |
1da177e4 LT |
2783 | } |
2784 | ||
8bf62ece AL |
2785 | /** |
2786 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
2787 | * @ap: Port associated with device @dev | |
2788 | * @dev: Device to which command will be sent | |
2789 | * | |
2790 | * LOCKING: | |
6aff8f1f TH |
2791 | * Kernel thread context (may sleep) |
2792 | * | |
2793 | * RETURNS: | |
2794 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece AL |
2795 | */ |
2796 | ||
6aff8f1f TH |
2797 | static unsigned int ata_dev_init_params(struct ata_port *ap, |
2798 | struct ata_device *dev) | |
8bf62ece | 2799 | { |
a0123703 | 2800 | struct ata_taskfile tf; |
6aff8f1f | 2801 | unsigned int err_mask; |
8bf62ece AL |
2802 | u16 sectors = dev->id[6]; |
2803 | u16 heads = dev->id[3]; | |
2804 | ||
2805 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
2806 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
6aff8f1f | 2807 | return 0; |
8bf62ece AL |
2808 | |
2809 | /* set up init dev params taskfile */ | |
2810 | DPRINTK("init dev params \n"); | |
2811 | ||
a0123703 TH |
2812 | ata_tf_init(ap, &tf, dev->devno); |
2813 | tf.command = ATA_CMD_INIT_DEV_PARAMS; | |
2814 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2815 | tf.protocol = ATA_PROT_NODATA; | |
2816 | tf.nsect = sectors; | |
2817 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 2818 | |
6aff8f1f | 2819 | err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); |
8bf62ece | 2820 | |
6aff8f1f TH |
2821 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
2822 | return err_mask; | |
8bf62ece AL |
2823 | } |
2824 | ||
1da177e4 | 2825 | /** |
0cba632b JG |
2826 | * ata_sg_clean - Unmap DMA memory associated with command |
2827 | * @qc: Command containing DMA memory to be released | |
2828 | * | |
2829 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
2830 | * |
2831 | * LOCKING: | |
0cba632b | 2832 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
2833 | */ |
2834 | ||
2835 | static void ata_sg_clean(struct ata_queued_cmd *qc) | |
2836 | { | |
2837 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 2838 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 2839 | int dir = qc->dma_dir; |
cedc9a47 | 2840 | void *pad_buf = NULL; |
1da177e4 | 2841 | |
a4631474 TH |
2842 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
2843 | WARN_ON(sg == NULL); | |
1da177e4 LT |
2844 | |
2845 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 2846 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 2847 | |
2c13b7ce | 2848 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 2849 | |
cedc9a47 JG |
2850 | /* if we padded the buffer out to 32-bit bound, and data |
2851 | * xfer direction is from-device, we must copy from the | |
2852 | * pad buffer back into the supplied buffer | |
2853 | */ | |
2854 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
2855 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
2856 | ||
2857 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d JG |
2858 | if (qc->n_elem) |
2859 | dma_unmap_sg(ap->host_set->dev, sg, qc->n_elem, dir); | |
cedc9a47 JG |
2860 | /* restore last sg */ |
2861 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
2862 | if (pad_buf) { | |
2863 | struct scatterlist *psg = &qc->pad_sgent; | |
2864 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
2865 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
dfa15988 | 2866 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
2867 | } |
2868 | } else { | |
2e242fa9 | 2869 | if (qc->n_elem) |
e1410f2d JG |
2870 | dma_unmap_single(ap->host_set->dev, |
2871 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), | |
2872 | dir); | |
cedc9a47 JG |
2873 | /* restore sg */ |
2874 | sg->length += qc->pad_len; | |
2875 | if (pad_buf) | |
2876 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
2877 | pad_buf, qc->pad_len); | |
2878 | } | |
1da177e4 LT |
2879 | |
2880 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 2881 | qc->__sg = NULL; |
1da177e4 LT |
2882 | } |
2883 | ||
2884 | /** | |
2885 | * ata_fill_sg - Fill PCI IDE PRD table | |
2886 | * @qc: Metadata associated with taskfile to be transferred | |
2887 | * | |
780a87f7 JG |
2888 | * Fill PCI IDE PRD (scatter-gather) table with segments |
2889 | * associated with the current disk command. | |
2890 | * | |
1da177e4 | 2891 | * LOCKING: |
780a87f7 | 2892 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
2893 | * |
2894 | */ | |
2895 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
2896 | { | |
1da177e4 | 2897 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
2898 | struct scatterlist *sg; |
2899 | unsigned int idx; | |
1da177e4 | 2900 | |
a4631474 | 2901 | WARN_ON(qc->__sg == NULL); |
f131883e | 2902 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
2903 | |
2904 | idx = 0; | |
cedc9a47 | 2905 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
2906 | u32 addr, offset; |
2907 | u32 sg_len, len; | |
2908 | ||
2909 | /* determine if physical DMA addr spans 64K boundary. | |
2910 | * Note h/w doesn't support 64-bit, so we unconditionally | |
2911 | * truncate dma_addr_t to u32. | |
2912 | */ | |
2913 | addr = (u32) sg_dma_address(sg); | |
2914 | sg_len = sg_dma_len(sg); | |
2915 | ||
2916 | while (sg_len) { | |
2917 | offset = addr & 0xffff; | |
2918 | len = sg_len; | |
2919 | if ((offset + sg_len) > 0x10000) | |
2920 | len = 0x10000 - offset; | |
2921 | ||
2922 | ap->prd[idx].addr = cpu_to_le32(addr); | |
2923 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
2924 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
2925 | ||
2926 | idx++; | |
2927 | sg_len -= len; | |
2928 | addr += len; | |
2929 | } | |
2930 | } | |
2931 | ||
2932 | if (idx) | |
2933 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
2934 | } | |
2935 | /** | |
2936 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
2937 | * @qc: Metadata associated with taskfile to check | |
2938 | * | |
780a87f7 JG |
2939 | * Allow low-level driver to filter ATA PACKET commands, returning |
2940 | * a status indicating whether or not it is OK to use DMA for the | |
2941 | * supplied PACKET command. | |
2942 | * | |
1da177e4 | 2943 | * LOCKING: |
0cba632b JG |
2944 | * spin_lock_irqsave(host_set lock) |
2945 | * | |
1da177e4 LT |
2946 | * RETURNS: 0 when ATAPI DMA can be used |
2947 | * nonzero otherwise | |
2948 | */ | |
2949 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
2950 | { | |
2951 | struct ata_port *ap = qc->ap; | |
2952 | int rc = 0; /* Assume ATAPI DMA is OK by default */ | |
2953 | ||
2954 | if (ap->ops->check_atapi_dma) | |
2955 | rc = ap->ops->check_atapi_dma(qc); | |
2956 | ||
2957 | return rc; | |
2958 | } | |
2959 | /** | |
2960 | * ata_qc_prep - Prepare taskfile for submission | |
2961 | * @qc: Metadata associated with taskfile to be prepared | |
2962 | * | |
780a87f7 JG |
2963 | * Prepare ATA taskfile for submission. |
2964 | * | |
1da177e4 LT |
2965 | * LOCKING: |
2966 | * spin_lock_irqsave(host_set lock) | |
2967 | */ | |
2968 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
2969 | { | |
2970 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
2971 | return; | |
2972 | ||
2973 | ata_fill_sg(qc); | |
2974 | } | |
2975 | ||
e46834cd BK |
2976 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
2977 | ||
0cba632b JG |
2978 | /** |
2979 | * ata_sg_init_one - Associate command with memory buffer | |
2980 | * @qc: Command to be associated | |
2981 | * @buf: Memory buffer | |
2982 | * @buflen: Length of memory buffer, in bytes. | |
2983 | * | |
2984 | * Initialize the data-related elements of queued_cmd @qc | |
2985 | * to point to a single memory buffer, @buf of byte length @buflen. | |
2986 | * | |
2987 | * LOCKING: | |
2988 | * spin_lock_irqsave(host_set lock) | |
2989 | */ | |
2990 | ||
1da177e4 LT |
2991 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
2992 | { | |
2993 | struct scatterlist *sg; | |
2994 | ||
2995 | qc->flags |= ATA_QCFLAG_SINGLE; | |
2996 | ||
2997 | memset(&qc->sgent, 0, sizeof(qc->sgent)); | |
cedc9a47 | 2998 | qc->__sg = &qc->sgent; |
1da177e4 | 2999 | qc->n_elem = 1; |
cedc9a47 | 3000 | qc->orig_n_elem = 1; |
1da177e4 LT |
3001 | qc->buf_virt = buf; |
3002 | ||
cedc9a47 | 3003 | sg = qc->__sg; |
f0612bbc | 3004 | sg_init_one(sg, buf, buflen); |
1da177e4 LT |
3005 | } |
3006 | ||
0cba632b JG |
3007 | /** |
3008 | * ata_sg_init - Associate command with scatter-gather table. | |
3009 | * @qc: Command to be associated | |
3010 | * @sg: Scatter-gather table. | |
3011 | * @n_elem: Number of elements in s/g table. | |
3012 | * | |
3013 | * Initialize the data-related elements of queued_cmd @qc | |
3014 | * to point to a scatter-gather table @sg, containing @n_elem | |
3015 | * elements. | |
3016 | * | |
3017 | * LOCKING: | |
3018 | * spin_lock_irqsave(host_set lock) | |
3019 | */ | |
3020 | ||
1da177e4 LT |
3021 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
3022 | unsigned int n_elem) | |
3023 | { | |
3024 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 3025 | qc->__sg = sg; |
1da177e4 | 3026 | qc->n_elem = n_elem; |
cedc9a47 | 3027 | qc->orig_n_elem = n_elem; |
1da177e4 LT |
3028 | } |
3029 | ||
3030 | /** | |
0cba632b JG |
3031 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
3032 | * @qc: Command with memory buffer to be mapped. | |
3033 | * | |
3034 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
3035 | * |
3036 | * LOCKING: | |
3037 | * spin_lock_irqsave(host_set lock) | |
3038 | * | |
3039 | * RETURNS: | |
0cba632b | 3040 | * Zero on success, negative on error. |
1da177e4 LT |
3041 | */ |
3042 | ||
3043 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
3044 | { | |
3045 | struct ata_port *ap = qc->ap; | |
3046 | int dir = qc->dma_dir; | |
cedc9a47 | 3047 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3048 | dma_addr_t dma_address; |
2e242fa9 | 3049 | int trim_sg = 0; |
1da177e4 | 3050 | |
cedc9a47 JG |
3051 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3052 | qc->pad_len = sg->length & 3; | |
3053 | if (qc->pad_len) { | |
3054 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3055 | struct scatterlist *psg = &qc->pad_sgent; | |
3056 | ||
a4631474 | 3057 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3058 | |
3059 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3060 | ||
3061 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
3062 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
3063 | qc->pad_len); | |
3064 | ||
3065 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3066 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3067 | /* trim sg */ | |
3068 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
3069 | if (sg->length == 0) |
3070 | trim_sg = 1; | |
cedc9a47 JG |
3071 | |
3072 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
3073 | sg->length, qc->pad_len); | |
3074 | } | |
3075 | ||
2e242fa9 TH |
3076 | if (trim_sg) { |
3077 | qc->n_elem--; | |
e1410f2d JG |
3078 | goto skip_map; |
3079 | } | |
3080 | ||
1da177e4 | 3081 | dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt, |
32529e01 | 3082 | sg->length, dir); |
537a95d9 TH |
3083 | if (dma_mapping_error(dma_address)) { |
3084 | /* restore sg */ | |
3085 | sg->length += qc->pad_len; | |
1da177e4 | 3086 | return -1; |
537a95d9 | 3087 | } |
1da177e4 LT |
3088 | |
3089 | sg_dma_address(sg) = dma_address; | |
32529e01 | 3090 | sg_dma_len(sg) = sg->length; |
1da177e4 | 3091 | |
2e242fa9 | 3092 | skip_map: |
1da177e4 LT |
3093 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
3094 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3095 | ||
3096 | return 0; | |
3097 | } | |
3098 | ||
3099 | /** | |
0cba632b JG |
3100 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
3101 | * @qc: Command with scatter-gather table to be mapped. | |
3102 | * | |
3103 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
3104 | * |
3105 | * LOCKING: | |
3106 | * spin_lock_irqsave(host_set lock) | |
3107 | * | |
3108 | * RETURNS: | |
0cba632b | 3109 | * Zero on success, negative on error. |
1da177e4 LT |
3110 | * |
3111 | */ | |
3112 | ||
3113 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
3114 | { | |
3115 | struct ata_port *ap = qc->ap; | |
cedc9a47 JG |
3116 | struct scatterlist *sg = qc->__sg; |
3117 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
e1410f2d | 3118 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 LT |
3119 | |
3120 | VPRINTK("ENTER, ata%u\n", ap->id); | |
a4631474 | 3121 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 3122 | |
cedc9a47 JG |
3123 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3124 | qc->pad_len = lsg->length & 3; | |
3125 | if (qc->pad_len) { | |
3126 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3127 | struct scatterlist *psg = &qc->pad_sgent; | |
3128 | unsigned int offset; | |
3129 | ||
a4631474 | 3130 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3131 | |
3132 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3133 | ||
3134 | /* | |
3135 | * psg->page/offset are used to copy to-be-written | |
3136 | * data in this function or read data in ata_sg_clean. | |
3137 | */ | |
3138 | offset = lsg->offset + lsg->length - qc->pad_len; | |
3139 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
3140 | psg->offset = offset_in_page(offset); | |
3141 | ||
3142 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
3143 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3144 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
dfa15988 | 3145 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3146 | } |
3147 | ||
3148 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3149 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3150 | /* trim last sg */ | |
3151 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
3152 | if (lsg->length == 0) |
3153 | trim_sg = 1; | |
cedc9a47 JG |
3154 | |
3155 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
3156 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
3157 | } | |
3158 | ||
e1410f2d JG |
3159 | pre_n_elem = qc->n_elem; |
3160 | if (trim_sg && pre_n_elem) | |
3161 | pre_n_elem--; | |
3162 | ||
3163 | if (!pre_n_elem) { | |
3164 | n_elem = 0; | |
3165 | goto skip_map; | |
3166 | } | |
3167 | ||
1da177e4 | 3168 | dir = qc->dma_dir; |
e1410f2d | 3169 | n_elem = dma_map_sg(ap->host_set->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
3170 | if (n_elem < 1) { |
3171 | /* restore last sg */ | |
3172 | lsg->length += qc->pad_len; | |
1da177e4 | 3173 | return -1; |
537a95d9 | 3174 | } |
1da177e4 LT |
3175 | |
3176 | DPRINTK("%d sg elements mapped\n", n_elem); | |
3177 | ||
e1410f2d | 3178 | skip_map: |
1da177e4 LT |
3179 | qc->n_elem = n_elem; |
3180 | ||
3181 | return 0; | |
3182 | } | |
3183 | ||
40e8c82c TH |
3184 | /** |
3185 | * ata_poll_qc_complete - turn irq back on and finish qc | |
3186 | * @qc: Command to complete | |
8e8b77dd | 3187 | * @err_mask: ATA status register content |
40e8c82c TH |
3188 | * |
3189 | * LOCKING: | |
3190 | * None. (grabs host lock) | |
3191 | */ | |
3192 | ||
a22e2eb0 | 3193 | void ata_poll_qc_complete(struct ata_queued_cmd *qc) |
40e8c82c TH |
3194 | { |
3195 | struct ata_port *ap = qc->ap; | |
b8f6153e | 3196 | unsigned long flags; |
40e8c82c | 3197 | |
b8f6153e | 3198 | spin_lock_irqsave(&ap->host_set->lock, flags); |
40e8c82c TH |
3199 | ap->flags &= ~ATA_FLAG_NOINTR; |
3200 | ata_irq_on(ap); | |
a22e2eb0 | 3201 | ata_qc_complete(qc); |
b8f6153e | 3202 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
40e8c82c TH |
3203 | } |
3204 | ||
1da177e4 | 3205 | /** |
c893a3ae | 3206 | * ata_pio_poll - poll using PIO, depending on current state |
6f0ef4fa | 3207 | * @ap: the target ata_port |
1da177e4 LT |
3208 | * |
3209 | * LOCKING: | |
0cba632b | 3210 | * None. (executing in kernel thread context) |
1da177e4 LT |
3211 | * |
3212 | * RETURNS: | |
6f0ef4fa | 3213 | * timeout value to use |
1da177e4 LT |
3214 | */ |
3215 | ||
3216 | static unsigned long ata_pio_poll(struct ata_port *ap) | |
3217 | { | |
c14b8331 | 3218 | struct ata_queued_cmd *qc; |
1da177e4 | 3219 | u8 status; |
14be71f4 AL |
3220 | unsigned int poll_state = HSM_ST_UNKNOWN; |
3221 | unsigned int reg_state = HSM_ST_UNKNOWN; | |
14be71f4 | 3222 | |
c14b8331 | 3223 | qc = ata_qc_from_tag(ap, ap->active_tag); |
a4631474 | 3224 | WARN_ON(qc == NULL); |
c14b8331 | 3225 | |
14be71f4 AL |
3226 | switch (ap->hsm_task_state) { |
3227 | case HSM_ST: | |
3228 | case HSM_ST_POLL: | |
3229 | poll_state = HSM_ST_POLL; | |
3230 | reg_state = HSM_ST; | |
1da177e4 | 3231 | break; |
14be71f4 AL |
3232 | case HSM_ST_LAST: |
3233 | case HSM_ST_LAST_POLL: | |
3234 | poll_state = HSM_ST_LAST_POLL; | |
3235 | reg_state = HSM_ST_LAST; | |
1da177e4 LT |
3236 | break; |
3237 | default: | |
3238 | BUG(); | |
3239 | break; | |
3240 | } | |
3241 | ||
3242 | status = ata_chk_status(ap); | |
3243 | if (status & ATA_BUSY) { | |
3244 | if (time_after(jiffies, ap->pio_task_timeout)) { | |
11a56d24 | 3245 | qc->err_mask |= AC_ERR_TIMEOUT; |
7c398335 | 3246 | ap->hsm_task_state = HSM_ST_TMOUT; |
1da177e4 LT |
3247 | return 0; |
3248 | } | |
14be71f4 | 3249 | ap->hsm_task_state = poll_state; |
1da177e4 LT |
3250 | return ATA_SHORT_PAUSE; |
3251 | } | |
3252 | ||
14be71f4 | 3253 | ap->hsm_task_state = reg_state; |
1da177e4 LT |
3254 | return 0; |
3255 | } | |
3256 | ||
3257 | /** | |
6f0ef4fa RD |
3258 | * ata_pio_complete - check if drive is busy or idle |
3259 | * @ap: the target ata_port | |
1da177e4 LT |
3260 | * |
3261 | * LOCKING: | |
0cba632b | 3262 | * None. (executing in kernel thread context) |
7fb6ec28 JG |
3263 | * |
3264 | * RETURNS: | |
3265 | * Non-zero if qc completed, zero otherwise. | |
1da177e4 LT |
3266 | */ |
3267 | ||
7fb6ec28 | 3268 | static int ata_pio_complete (struct ata_port *ap) |
1da177e4 LT |
3269 | { |
3270 | struct ata_queued_cmd *qc; | |
3271 | u8 drv_stat; | |
3272 | ||
3273 | /* | |
31433ea3 AC |
3274 | * This is purely heuristic. This is a fast path. Sometimes when |
3275 | * we enter, BSY will be cleared in a chk-status or two. If not, | |
3276 | * the drive is probably seeking or something. Snooze for a couple | |
3277 | * msecs, then chk-status again. If still busy, fall back to | |
14be71f4 | 3278 | * HSM_ST_POLL state. |
1da177e4 | 3279 | */ |
fe79e683 AL |
3280 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
3281 | if (drv_stat & ATA_BUSY) { | |
1da177e4 | 3282 | msleep(2); |
fe79e683 AL |
3283 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
3284 | if (drv_stat & ATA_BUSY) { | |
14be71f4 | 3285 | ap->hsm_task_state = HSM_ST_LAST_POLL; |
1da177e4 | 3286 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
7fb6ec28 | 3287 | return 0; |
1da177e4 LT |
3288 | } |
3289 | } | |
3290 | ||
c14b8331 | 3291 | qc = ata_qc_from_tag(ap, ap->active_tag); |
a4631474 | 3292 | WARN_ON(qc == NULL); |
c14b8331 | 3293 | |
1da177e4 LT |
3294 | drv_stat = ata_wait_idle(ap); |
3295 | if (!ata_ok(drv_stat)) { | |
1c848984 | 3296 | qc->err_mask |= __ac_err_mask(drv_stat); |
14be71f4 | 3297 | ap->hsm_task_state = HSM_ST_ERR; |
7fb6ec28 | 3298 | return 0; |
1da177e4 LT |
3299 | } |
3300 | ||
14be71f4 | 3301 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 3302 | |
a4631474 | 3303 | WARN_ON(qc->err_mask); |
a22e2eb0 | 3304 | ata_poll_qc_complete(qc); |
7fb6ec28 JG |
3305 | |
3306 | /* another command may start at this point */ | |
3307 | ||
3308 | return 1; | |
1da177e4 LT |
3309 | } |
3310 | ||
0baab86b EF |
3311 | |
3312 | /** | |
c893a3ae | 3313 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
3314 | * @buf: Buffer to swap |
3315 | * @buf_words: Number of 16-bit words in buffer. | |
3316 | * | |
3317 | * Swap halves of 16-bit words if needed to convert from | |
3318 | * little-endian byte order to native cpu byte order, or | |
3319 | * vice-versa. | |
3320 | * | |
3321 | * LOCKING: | |
6f0ef4fa | 3322 | * Inherited from caller. |
0baab86b | 3323 | */ |
1da177e4 LT |
3324 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
3325 | { | |
3326 | #ifdef __BIG_ENDIAN | |
3327 | unsigned int i; | |
3328 | ||
3329 | for (i = 0; i < buf_words; i++) | |
3330 | buf[i] = le16_to_cpu(buf[i]); | |
3331 | #endif /* __BIG_ENDIAN */ | |
3332 | } | |
3333 | ||
6ae4cfb5 AL |
3334 | /** |
3335 | * ata_mmio_data_xfer - Transfer data by MMIO | |
3336 | * @ap: port to read/write | |
3337 | * @buf: data buffer | |
3338 | * @buflen: buffer length | |
344babaa | 3339 | * @write_data: read/write |
6ae4cfb5 AL |
3340 | * |
3341 | * Transfer data from/to the device data register by MMIO. | |
3342 | * | |
3343 | * LOCKING: | |
3344 | * Inherited from caller. | |
6ae4cfb5 AL |
3345 | */ |
3346 | ||
1da177e4 LT |
3347 | static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3348 | unsigned int buflen, int write_data) | |
3349 | { | |
3350 | unsigned int i; | |
3351 | unsigned int words = buflen >> 1; | |
3352 | u16 *buf16 = (u16 *) buf; | |
3353 | void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr; | |
3354 | ||
6ae4cfb5 | 3355 | /* Transfer multiple of 2 bytes */ |
1da177e4 LT |
3356 | if (write_data) { |
3357 | for (i = 0; i < words; i++) | |
3358 | writew(le16_to_cpu(buf16[i]), mmio); | |
3359 | } else { | |
3360 | for (i = 0; i < words; i++) | |
3361 | buf16[i] = cpu_to_le16(readw(mmio)); | |
3362 | } | |
6ae4cfb5 AL |
3363 | |
3364 | /* Transfer trailing 1 byte, if any. */ | |
3365 | if (unlikely(buflen & 0x01)) { | |
3366 | u16 align_buf[1] = { 0 }; | |
3367 | unsigned char *trailing_buf = buf + buflen - 1; | |
3368 | ||
3369 | if (write_data) { | |
3370 | memcpy(align_buf, trailing_buf, 1); | |
3371 | writew(le16_to_cpu(align_buf[0]), mmio); | |
3372 | } else { | |
3373 | align_buf[0] = cpu_to_le16(readw(mmio)); | |
3374 | memcpy(trailing_buf, align_buf, 1); | |
3375 | } | |
3376 | } | |
1da177e4 LT |
3377 | } |
3378 | ||
6ae4cfb5 AL |
3379 | /** |
3380 | * ata_pio_data_xfer - Transfer data by PIO | |
3381 | * @ap: port to read/write | |
3382 | * @buf: data buffer | |
3383 | * @buflen: buffer length | |
344babaa | 3384 | * @write_data: read/write |
6ae4cfb5 AL |
3385 | * |
3386 | * Transfer data from/to the device data register by PIO. | |
3387 | * | |
3388 | * LOCKING: | |
3389 | * Inherited from caller. | |
6ae4cfb5 AL |
3390 | */ |
3391 | ||
1da177e4 LT |
3392 | static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3393 | unsigned int buflen, int write_data) | |
3394 | { | |
6ae4cfb5 | 3395 | unsigned int words = buflen >> 1; |
1da177e4 | 3396 | |
6ae4cfb5 | 3397 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 3398 | if (write_data) |
6ae4cfb5 | 3399 | outsw(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 3400 | else |
6ae4cfb5 AL |
3401 | insw(ap->ioaddr.data_addr, buf, words); |
3402 | ||
3403 | /* Transfer trailing 1 byte, if any. */ | |
3404 | if (unlikely(buflen & 0x01)) { | |
3405 | u16 align_buf[1] = { 0 }; | |
3406 | unsigned char *trailing_buf = buf + buflen - 1; | |
3407 | ||
3408 | if (write_data) { | |
3409 | memcpy(align_buf, trailing_buf, 1); | |
3410 | outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); | |
3411 | } else { | |
3412 | align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr)); | |
3413 | memcpy(trailing_buf, align_buf, 1); | |
3414 | } | |
3415 | } | |
1da177e4 LT |
3416 | } |
3417 | ||
6ae4cfb5 AL |
3418 | /** |
3419 | * ata_data_xfer - Transfer data from/to the data register. | |
3420 | * @ap: port to read/write | |
3421 | * @buf: data buffer | |
3422 | * @buflen: buffer length | |
3423 | * @do_write: read/write | |
3424 | * | |
3425 | * Transfer data from/to the device data register. | |
3426 | * | |
3427 | * LOCKING: | |
3428 | * Inherited from caller. | |
6ae4cfb5 AL |
3429 | */ |
3430 | ||
1da177e4 LT |
3431 | static void ata_data_xfer(struct ata_port *ap, unsigned char *buf, |
3432 | unsigned int buflen, int do_write) | |
3433 | { | |
a1bd9e68 AC |
3434 | /* Make the crap hardware pay the costs not the good stuff */ |
3435 | if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) { | |
3436 | unsigned long flags; | |
3437 | local_irq_save(flags); | |
3438 | if (ap->flags & ATA_FLAG_MMIO) | |
3439 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3440 | else | |
3441 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3442 | local_irq_restore(flags); | |
3443 | } else { | |
3444 | if (ap->flags & ATA_FLAG_MMIO) | |
3445 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3446 | else | |
3447 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3448 | } | |
1da177e4 LT |
3449 | } |
3450 | ||
6ae4cfb5 AL |
3451 | /** |
3452 | * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. | |
3453 | * @qc: Command on going | |
3454 | * | |
3455 | * Transfer ATA_SECT_SIZE of data from/to the ATA device. | |
3456 | * | |
3457 | * LOCKING: | |
3458 | * Inherited from caller. | |
3459 | */ | |
3460 | ||
1da177e4 LT |
3461 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
3462 | { | |
3463 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3464 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3465 | struct ata_port *ap = qc->ap; |
3466 | struct page *page; | |
3467 | unsigned int offset; | |
3468 | unsigned char *buf; | |
3469 | ||
3470 | if (qc->cursect == (qc->nsect - 1)) | |
14be71f4 | 3471 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3472 | |
3473 | page = sg[qc->cursg].page; | |
3474 | offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; | |
3475 | ||
3476 | /* get the current page and offset */ | |
3477 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3478 | offset %= PAGE_SIZE; | |
3479 | ||
3480 | buf = kmap(page) + offset; | |
3481 | ||
3482 | qc->cursect++; | |
3483 | qc->cursg_ofs++; | |
3484 | ||
32529e01 | 3485 | if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) { |
1da177e4 LT |
3486 | qc->cursg++; |
3487 | qc->cursg_ofs = 0; | |
3488 | } | |
3489 | ||
3490 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3491 | ||
3492 | /* do the actual data transfer */ | |
3493 | do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
3494 | ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write); | |
3495 | ||
3496 | kunmap(page); | |
3497 | } | |
3498 | ||
6ae4cfb5 AL |
3499 | /** |
3500 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3501 | * @qc: Command on going | |
3502 | * @bytes: number of bytes | |
3503 | * | |
3504 | * Transfer Transfer data from/to the ATAPI device. | |
3505 | * | |
3506 | * LOCKING: | |
3507 | * Inherited from caller. | |
3508 | * | |
3509 | */ | |
3510 | ||
1da177e4 LT |
3511 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
3512 | { | |
3513 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3514 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3515 | struct ata_port *ap = qc->ap; |
3516 | struct page *page; | |
3517 | unsigned char *buf; | |
3518 | unsigned int offset, count; | |
3519 | ||
563a6e1f | 3520 | if (qc->curbytes + bytes >= qc->nbytes) |
14be71f4 | 3521 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3522 | |
3523 | next_sg: | |
563a6e1f | 3524 | if (unlikely(qc->cursg >= qc->n_elem)) { |
7fb6ec28 | 3525 | /* |
563a6e1f AL |
3526 | * The end of qc->sg is reached and the device expects |
3527 | * more data to transfer. In order not to overrun qc->sg | |
3528 | * and fulfill length specified in the byte count register, | |
3529 | * - for read case, discard trailing data from the device | |
3530 | * - for write case, padding zero data to the device | |
3531 | */ | |
3532 | u16 pad_buf[1] = { 0 }; | |
3533 | unsigned int words = bytes >> 1; | |
3534 | unsigned int i; | |
3535 | ||
3536 | if (words) /* warning if bytes > 1 */ | |
7fb6ec28 | 3537 | printk(KERN_WARNING "ata%u: %u bytes trailing data\n", |
563a6e1f AL |
3538 | ap->id, bytes); |
3539 | ||
3540 | for (i = 0; i < words; i++) | |
3541 | ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write); | |
3542 | ||
14be71f4 | 3543 | ap->hsm_task_state = HSM_ST_LAST; |
563a6e1f AL |
3544 | return; |
3545 | } | |
3546 | ||
cedc9a47 | 3547 | sg = &qc->__sg[qc->cursg]; |
1da177e4 | 3548 | |
1da177e4 LT |
3549 | page = sg->page; |
3550 | offset = sg->offset + qc->cursg_ofs; | |
3551 | ||
3552 | /* get the current page and offset */ | |
3553 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3554 | offset %= PAGE_SIZE; | |
3555 | ||
6952df03 | 3556 | /* don't overrun current sg */ |
32529e01 | 3557 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
3558 | |
3559 | /* don't cross page boundaries */ | |
3560 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
3561 | ||
3562 | buf = kmap(page) + offset; | |
3563 | ||
3564 | bytes -= count; | |
3565 | qc->curbytes += count; | |
3566 | qc->cursg_ofs += count; | |
3567 | ||
32529e01 | 3568 | if (qc->cursg_ofs == sg->length) { |
1da177e4 LT |
3569 | qc->cursg++; |
3570 | qc->cursg_ofs = 0; | |
3571 | } | |
3572 | ||
3573 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3574 | ||
3575 | /* do the actual data transfer */ | |
3576 | ata_data_xfer(ap, buf, count, do_write); | |
3577 | ||
3578 | kunmap(page); | |
3579 | ||
563a6e1f | 3580 | if (bytes) |
1da177e4 | 3581 | goto next_sg; |
1da177e4 LT |
3582 | } |
3583 | ||
6ae4cfb5 AL |
3584 | /** |
3585 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3586 | * @qc: Command on going | |
3587 | * | |
3588 | * Transfer Transfer data from/to the ATAPI device. | |
3589 | * | |
3590 | * LOCKING: | |
3591 | * Inherited from caller. | |
6ae4cfb5 AL |
3592 | */ |
3593 | ||
1da177e4 LT |
3594 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
3595 | { | |
3596 | struct ata_port *ap = qc->ap; | |
3597 | struct ata_device *dev = qc->dev; | |
3598 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
3599 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
3600 | ||
3601 | ap->ops->tf_read(ap, &qc->tf); | |
3602 | ireason = qc->tf.nsect; | |
3603 | bc_lo = qc->tf.lbam; | |
3604 | bc_hi = qc->tf.lbah; | |
3605 | bytes = (bc_hi << 8) | bc_lo; | |
3606 | ||
3607 | /* shall be cleared to zero, indicating xfer of data */ | |
3608 | if (ireason & (1 << 0)) | |
3609 | goto err_out; | |
3610 | ||
3611 | /* make sure transfer direction matches expected */ | |
3612 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
3613 | if (do_write != i_write) | |
3614 | goto err_out; | |
3615 | ||
3616 | __atapi_pio_bytes(qc, bytes); | |
3617 | ||
3618 | return; | |
3619 | ||
3620 | err_out: | |
3621 | printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n", | |
3622 | ap->id, dev->devno); | |
11a56d24 | 3623 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3624 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
3625 | } |
3626 | ||
3627 | /** | |
6f0ef4fa RD |
3628 | * ata_pio_block - start PIO on a block |
3629 | * @ap: the target ata_port | |
1da177e4 LT |
3630 | * |
3631 | * LOCKING: | |
0cba632b | 3632 | * None. (executing in kernel thread context) |
1da177e4 LT |
3633 | */ |
3634 | ||
3635 | static void ata_pio_block(struct ata_port *ap) | |
3636 | { | |
3637 | struct ata_queued_cmd *qc; | |
3638 | u8 status; | |
3639 | ||
3640 | /* | |
6f0ef4fa | 3641 | * This is purely heuristic. This is a fast path. |
1da177e4 LT |
3642 | * Sometimes when we enter, BSY will be cleared in |
3643 | * a chk-status or two. If not, the drive is probably seeking | |
3644 | * or something. Snooze for a couple msecs, then | |
3645 | * chk-status again. If still busy, fall back to | |
14be71f4 | 3646 | * HSM_ST_POLL state. |
1da177e4 LT |
3647 | */ |
3648 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
3649 | if (status & ATA_BUSY) { | |
3650 | msleep(2); | |
3651 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
3652 | if (status & ATA_BUSY) { | |
14be71f4 | 3653 | ap->hsm_task_state = HSM_ST_POLL; |
1da177e4 LT |
3654 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
3655 | return; | |
3656 | } | |
3657 | } | |
3658 | ||
3659 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
a4631474 | 3660 | WARN_ON(qc == NULL); |
1da177e4 | 3661 | |
fe79e683 AL |
3662 | /* check error */ |
3663 | if (status & (ATA_ERR | ATA_DF)) { | |
3664 | qc->err_mask |= AC_ERR_DEV; | |
3665 | ap->hsm_task_state = HSM_ST_ERR; | |
3666 | return; | |
3667 | } | |
3668 | ||
3669 | /* transfer data if any */ | |
1da177e4 | 3670 | if (is_atapi_taskfile(&qc->tf)) { |
fe79e683 | 3671 | /* DRQ=0 means no more data to transfer */ |
1da177e4 | 3672 | if ((status & ATA_DRQ) == 0) { |
14be71f4 | 3673 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3674 | return; |
3675 | } | |
3676 | ||
3677 | atapi_pio_bytes(qc); | |
3678 | } else { | |
3679 | /* handle BSY=0, DRQ=0 as error */ | |
3680 | if ((status & ATA_DRQ) == 0) { | |
11a56d24 | 3681 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3682 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
3683 | return; |
3684 | } | |
3685 | ||
3686 | ata_pio_sector(qc); | |
3687 | } | |
3688 | } | |
3689 | ||
3690 | static void ata_pio_error(struct ata_port *ap) | |
3691 | { | |
3692 | struct ata_queued_cmd *qc; | |
a7dac447 | 3693 | |
1da177e4 | 3694 | qc = ata_qc_from_tag(ap, ap->active_tag); |
a4631474 | 3695 | WARN_ON(qc == NULL); |
1da177e4 | 3696 | |
0565c26d AL |
3697 | if (qc->tf.command != ATA_CMD_PACKET) |
3698 | printk(KERN_WARNING "ata%u: PIO error\n", ap->id); | |
3699 | ||
2e9edbf8 | 3700 | /* make sure qc->err_mask is available to |
1c848984 AL |
3701 | * know what's wrong and recover |
3702 | */ | |
a4631474 | 3703 | WARN_ON(qc->err_mask == 0); |
1c848984 | 3704 | |
14be71f4 | 3705 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 3706 | |
a22e2eb0 | 3707 | ata_poll_qc_complete(qc); |
1da177e4 LT |
3708 | } |
3709 | ||
3710 | static void ata_pio_task(void *_data) | |
3711 | { | |
3712 | struct ata_port *ap = _data; | |
7fb6ec28 JG |
3713 | unsigned long timeout; |
3714 | int qc_completed; | |
3715 | ||
3716 | fsm_start: | |
3717 | timeout = 0; | |
3718 | qc_completed = 0; | |
1da177e4 | 3719 | |
14be71f4 AL |
3720 | switch (ap->hsm_task_state) { |
3721 | case HSM_ST_IDLE: | |
1da177e4 LT |
3722 | return; |
3723 | ||
14be71f4 | 3724 | case HSM_ST: |
1da177e4 LT |
3725 | ata_pio_block(ap); |
3726 | break; | |
3727 | ||
14be71f4 | 3728 | case HSM_ST_LAST: |
7fb6ec28 | 3729 | qc_completed = ata_pio_complete(ap); |
1da177e4 LT |
3730 | break; |
3731 | ||
14be71f4 AL |
3732 | case HSM_ST_POLL: |
3733 | case HSM_ST_LAST_POLL: | |
1da177e4 LT |
3734 | timeout = ata_pio_poll(ap); |
3735 | break; | |
3736 | ||
14be71f4 AL |
3737 | case HSM_ST_TMOUT: |
3738 | case HSM_ST_ERR: | |
1da177e4 LT |
3739 | ata_pio_error(ap); |
3740 | return; | |
3741 | } | |
3742 | ||
3743 | if (timeout) | |
8061f5f0 | 3744 | ata_port_queue_task(ap, ata_pio_task, ap, timeout); |
7fb6ec28 JG |
3745 | else if (!qc_completed) |
3746 | goto fsm_start; | |
1da177e4 LT |
3747 | } |
3748 | ||
8061f5f0 TH |
3749 | /** |
3750 | * atapi_packet_task - Write CDB bytes to hardware | |
3751 | * @_data: Port to which ATAPI device is attached. | |
3752 | * | |
3753 | * When device has indicated its readiness to accept | |
3754 | * a CDB, this function is called. Send the CDB. | |
3755 | * If DMA is to be performed, exit immediately. | |
3756 | * Otherwise, we are in polling mode, so poll | |
3757 | * status under operation succeeds or fails. | |
3758 | * | |
3759 | * LOCKING: | |
3760 | * Kernel thread context (may sleep) | |
3761 | */ | |
3762 | ||
3763 | static void atapi_packet_task(void *_data) | |
3764 | { | |
3765 | struct ata_port *ap = _data; | |
3766 | struct ata_queued_cmd *qc; | |
3767 | u8 status; | |
3768 | ||
3769 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
3770 | WARN_ON(qc == NULL); | |
3771 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
3772 | ||
3773 | /* sleep-wait for BSY to clear */ | |
3774 | DPRINTK("busy wait\n"); | |
3775 | if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) { | |
3776 | qc->err_mask |= AC_ERR_TIMEOUT; | |
3777 | goto err_out; | |
3778 | } | |
3779 | ||
3780 | /* make sure DRQ is set */ | |
3781 | status = ata_chk_status(ap); | |
3782 | if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) { | |
3783 | qc->err_mask |= AC_ERR_HSM; | |
3784 | goto err_out; | |
3785 | } | |
3786 | ||
3787 | /* send SCSI cdb */ | |
3788 | DPRINTK("send cdb\n"); | |
3789 | WARN_ON(qc->dev->cdb_len < 12); | |
3790 | ||
3791 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA || | |
3792 | qc->tf.protocol == ATA_PROT_ATAPI_NODATA) { | |
3793 | unsigned long flags; | |
3794 | ||
3795 | /* Once we're done issuing command and kicking bmdma, | |
3796 | * irq handler takes over. To not lose irq, we need | |
3797 | * to clear NOINTR flag before sending cdb, but | |
3798 | * interrupt handler shouldn't be invoked before we're | |
3799 | * finished. Hence, the following locking. | |
3800 | */ | |
3801 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
3802 | ap->flags &= ~ATA_FLAG_NOINTR; | |
3803 | ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); | |
3804 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA) | |
3805 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
3806 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
3807 | } else { | |
3808 | ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); | |
3809 | ||
3810 | /* PIO commands are handled by polling */ | |
3811 | ap->hsm_task_state = HSM_ST; | |
3812 | ata_port_queue_task(ap, ata_pio_task, ap, 0); | |
3813 | } | |
3814 | ||
3815 | return; | |
3816 | ||
3817 | err_out: | |
3818 | ata_poll_qc_complete(qc); | |
3819 | } | |
3820 | ||
1da177e4 LT |
3821 | /** |
3822 | * ata_qc_timeout - Handle timeout of queued command | |
3823 | * @qc: Command that timed out | |
3824 | * | |
3825 | * Some part of the kernel (currently, only the SCSI layer) | |
3826 | * has noticed that the active command on port @ap has not | |
3827 | * completed after a specified length of time. Handle this | |
3828 | * condition by disabling DMA (if necessary) and completing | |
3829 | * transactions, with error if necessary. | |
3830 | * | |
3831 | * This also handles the case of the "lost interrupt", where | |
3832 | * for some reason (possibly hardware bug, possibly driver bug) | |
3833 | * an interrupt was not delivered to the driver, even though the | |
3834 | * transaction completed successfully. | |
3835 | * | |
3836 | * LOCKING: | |
0cba632b | 3837 | * Inherited from SCSI layer (none, can sleep) |
1da177e4 LT |
3838 | */ |
3839 | ||
3840 | static void ata_qc_timeout(struct ata_queued_cmd *qc) | |
3841 | { | |
3842 | struct ata_port *ap = qc->ap; | |
b8f6153e | 3843 | struct ata_host_set *host_set = ap->host_set; |
1da177e4 | 3844 | u8 host_stat = 0, drv_stat; |
b8f6153e | 3845 | unsigned long flags; |
1da177e4 LT |
3846 | |
3847 | DPRINTK("ENTER\n"); | |
3848 | ||
c18d06f8 TH |
3849 | ap->hsm_task_state = HSM_ST_IDLE; |
3850 | ||
b8f6153e JG |
3851 | spin_lock_irqsave(&host_set->lock, flags); |
3852 | ||
1da177e4 LT |
3853 | switch (qc->tf.protocol) { |
3854 | ||
3855 | case ATA_PROT_DMA: | |
3856 | case ATA_PROT_ATAPI_DMA: | |
3857 | host_stat = ap->ops->bmdma_status(ap); | |
3858 | ||
3859 | /* before we do anything else, clear DMA-Start bit */ | |
b73fc89f | 3860 | ap->ops->bmdma_stop(qc); |
1da177e4 LT |
3861 | |
3862 | /* fall through */ | |
3863 | ||
3864 | default: | |
3865 | ata_altstatus(ap); | |
3866 | drv_stat = ata_chk_status(ap); | |
3867 | ||
3868 | /* ack bmdma irq events */ | |
3869 | ap->ops->irq_clear(ap); | |
3870 | ||
3871 | printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n", | |
3872 | ap->id, qc->tf.command, drv_stat, host_stat); | |
3873 | ||
3874 | /* complete taskfile transaction */ | |
a22e2eb0 | 3875 | qc->err_mask |= ac_err_mask(drv_stat); |
1da177e4 LT |
3876 | break; |
3877 | } | |
b8f6153e JG |
3878 | |
3879 | spin_unlock_irqrestore(&host_set->lock, flags); | |
3880 | ||
a72ec4ce TH |
3881 | ata_eh_qc_complete(qc); |
3882 | ||
1da177e4 LT |
3883 | DPRINTK("EXIT\n"); |
3884 | } | |
3885 | ||
3886 | /** | |
3887 | * ata_eng_timeout - Handle timeout of queued command | |
3888 | * @ap: Port on which timed-out command is active | |
3889 | * | |
3890 | * Some part of the kernel (currently, only the SCSI layer) | |
3891 | * has noticed that the active command on port @ap has not | |
3892 | * completed after a specified length of time. Handle this | |
3893 | * condition by disabling DMA (if necessary) and completing | |
3894 | * transactions, with error if necessary. | |
3895 | * | |
3896 | * This also handles the case of the "lost interrupt", where | |
3897 | * for some reason (possibly hardware bug, possibly driver bug) | |
3898 | * an interrupt was not delivered to the driver, even though the | |
3899 | * transaction completed successfully. | |
3900 | * | |
3901 | * LOCKING: | |
3902 | * Inherited from SCSI layer (none, can sleep) | |
3903 | */ | |
3904 | ||
3905 | void ata_eng_timeout(struct ata_port *ap) | |
3906 | { | |
1da177e4 LT |
3907 | DPRINTK("ENTER\n"); |
3908 | ||
f6379020 | 3909 | ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag)); |
1da177e4 | 3910 | |
1da177e4 LT |
3911 | DPRINTK("EXIT\n"); |
3912 | } | |
3913 | ||
3914 | /** | |
3915 | * ata_qc_new - Request an available ATA command, for queueing | |
3916 | * @ap: Port associated with device @dev | |
3917 | * @dev: Device from whom we request an available command structure | |
3918 | * | |
3919 | * LOCKING: | |
0cba632b | 3920 | * None. |
1da177e4 LT |
3921 | */ |
3922 | ||
3923 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
3924 | { | |
3925 | struct ata_queued_cmd *qc = NULL; | |
3926 | unsigned int i; | |
3927 | ||
3928 | for (i = 0; i < ATA_MAX_QUEUE; i++) | |
3929 | if (!test_and_set_bit(i, &ap->qactive)) { | |
3930 | qc = ata_qc_from_tag(ap, i); | |
3931 | break; | |
3932 | } | |
3933 | ||
3934 | if (qc) | |
3935 | qc->tag = i; | |
3936 | ||
3937 | return qc; | |
3938 | } | |
3939 | ||
3940 | /** | |
3941 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
3942 | * @ap: Port associated with device @dev | |
3943 | * @dev: Device from whom we request an available command structure | |
3944 | * | |
3945 | * LOCKING: | |
0cba632b | 3946 | * None. |
1da177e4 LT |
3947 | */ |
3948 | ||
3949 | struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, | |
3950 | struct ata_device *dev) | |
3951 | { | |
3952 | struct ata_queued_cmd *qc; | |
3953 | ||
3954 | qc = ata_qc_new(ap); | |
3955 | if (qc) { | |
1da177e4 LT |
3956 | qc->scsicmd = NULL; |
3957 | qc->ap = ap; | |
3958 | qc->dev = dev; | |
1da177e4 | 3959 | |
2c13b7ce | 3960 | ata_qc_reinit(qc); |
1da177e4 LT |
3961 | } |
3962 | ||
3963 | return qc; | |
3964 | } | |
3965 | ||
1da177e4 LT |
3966 | /** |
3967 | * ata_qc_free - free unused ata_queued_cmd | |
3968 | * @qc: Command to complete | |
3969 | * | |
3970 | * Designed to free unused ata_queued_cmd object | |
3971 | * in case something prevents using it. | |
3972 | * | |
3973 | * LOCKING: | |
0cba632b | 3974 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
3975 | */ |
3976 | void ata_qc_free(struct ata_queued_cmd *qc) | |
3977 | { | |
4ba946e9 TH |
3978 | struct ata_port *ap = qc->ap; |
3979 | unsigned int tag; | |
3980 | ||
a4631474 | 3981 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 3982 | |
4ba946e9 TH |
3983 | qc->flags = 0; |
3984 | tag = qc->tag; | |
3985 | if (likely(ata_tag_valid(tag))) { | |
3986 | if (tag == ap->active_tag) | |
3987 | ap->active_tag = ATA_TAG_POISON; | |
3988 | qc->tag = ATA_TAG_POISON; | |
3989 | clear_bit(tag, &ap->qactive); | |
3990 | } | |
1da177e4 LT |
3991 | } |
3992 | ||
76014427 | 3993 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 3994 | { |
a4631474 TH |
3995 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
3996 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
3997 | |
3998 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
3999 | ata_sg_clean(qc); | |
4000 | ||
3f3791d3 AL |
4001 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4002 | * from completing the command twice later, before the error handler | |
4003 | * is called. (when rc != 0 and atapi request sense is needed) | |
4004 | */ | |
4005 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
4006 | ||
1da177e4 | 4007 | /* call completion callback */ |
77853bf2 | 4008 | qc->complete_fn(qc); |
1da177e4 LT |
4009 | } |
4010 | ||
4011 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) | |
4012 | { | |
4013 | struct ata_port *ap = qc->ap; | |
4014 | ||
4015 | switch (qc->tf.protocol) { | |
4016 | case ATA_PROT_DMA: | |
4017 | case ATA_PROT_ATAPI_DMA: | |
4018 | return 1; | |
4019 | ||
4020 | case ATA_PROT_ATAPI: | |
4021 | case ATA_PROT_PIO: | |
1da177e4 LT |
4022 | if (ap->flags & ATA_FLAG_PIO_DMA) |
4023 | return 1; | |
4024 | ||
4025 | /* fall through */ | |
4026 | ||
4027 | default: | |
4028 | return 0; | |
4029 | } | |
4030 | ||
4031 | /* never reached */ | |
4032 | } | |
4033 | ||
4034 | /** | |
4035 | * ata_qc_issue - issue taskfile to device | |
4036 | * @qc: command to issue to device | |
4037 | * | |
4038 | * Prepare an ATA command to submission to device. | |
4039 | * This includes mapping the data into a DMA-able | |
4040 | * area, filling in the S/G table, and finally | |
4041 | * writing the taskfile to hardware, starting the command. | |
4042 | * | |
4043 | * LOCKING: | |
4044 | * spin_lock_irqsave(host_set lock) | |
4045 | * | |
4046 | * RETURNS: | |
9a3d9eb0 | 4047 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
4048 | */ |
4049 | ||
9a3d9eb0 | 4050 | unsigned int ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
4051 | { |
4052 | struct ata_port *ap = qc->ap; | |
4053 | ||
4054 | if (ata_should_dma_map(qc)) { | |
4055 | if (qc->flags & ATA_QCFLAG_SG) { | |
4056 | if (ata_sg_setup(qc)) | |
8e436af9 | 4057 | goto sg_err; |
1da177e4 LT |
4058 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
4059 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 4060 | goto sg_err; |
1da177e4 LT |
4061 | } |
4062 | } else { | |
4063 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
4064 | } | |
4065 | ||
4066 | ap->ops->qc_prep(qc); | |
4067 | ||
4068 | qc->ap->active_tag = qc->tag; | |
4069 | qc->flags |= ATA_QCFLAG_ACTIVE; | |
4070 | ||
4071 | return ap->ops->qc_issue(qc); | |
4072 | ||
8e436af9 TH |
4073 | sg_err: |
4074 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
9a3d9eb0 | 4075 | return AC_ERR_SYSTEM; |
1da177e4 LT |
4076 | } |
4077 | ||
0baab86b | 4078 | |
1da177e4 LT |
4079 | /** |
4080 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
4081 | * @qc: command to issue to device | |
4082 | * | |
4083 | * Using various libata functions and hooks, this function | |
4084 | * starts an ATA command. ATA commands are grouped into | |
4085 | * classes called "protocols", and issuing each type of protocol | |
4086 | * is slightly different. | |
4087 | * | |
0baab86b EF |
4088 | * May be used as the qc_issue() entry in ata_port_operations. |
4089 | * | |
1da177e4 LT |
4090 | * LOCKING: |
4091 | * spin_lock_irqsave(host_set lock) | |
4092 | * | |
4093 | * RETURNS: | |
9a3d9eb0 | 4094 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
4095 | */ |
4096 | ||
9a3d9eb0 | 4097 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
4098 | { |
4099 | struct ata_port *ap = qc->ap; | |
4100 | ||
4101 | ata_dev_select(ap, qc->dev->devno, 1, 0); | |
4102 | ||
4103 | switch (qc->tf.protocol) { | |
4104 | case ATA_PROT_NODATA: | |
e5338254 | 4105 | ata_tf_to_host(ap, &qc->tf); |
1da177e4 LT |
4106 | break; |
4107 | ||
4108 | case ATA_PROT_DMA: | |
4109 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ | |
4110 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
4111 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
4112 | break; | |
4113 | ||
4114 | case ATA_PROT_PIO: /* load tf registers, initiate polling pio */ | |
4115 | ata_qc_set_polling(qc); | |
e5338254 | 4116 | ata_tf_to_host(ap, &qc->tf); |
14be71f4 | 4117 | ap->hsm_task_state = HSM_ST; |
8061f5f0 | 4118 | ata_port_queue_task(ap, ata_pio_task, ap, 0); |
1da177e4 LT |
4119 | break; |
4120 | ||
4121 | case ATA_PROT_ATAPI: | |
4122 | ata_qc_set_polling(qc); | |
e5338254 | 4123 | ata_tf_to_host(ap, &qc->tf); |
8061f5f0 | 4124 | ata_port_queue_task(ap, atapi_packet_task, ap, 0); |
1da177e4 LT |
4125 | break; |
4126 | ||
4127 | case ATA_PROT_ATAPI_NODATA: | |
c1389503 | 4128 | ap->flags |= ATA_FLAG_NOINTR; |
e5338254 | 4129 | ata_tf_to_host(ap, &qc->tf); |
8061f5f0 | 4130 | ata_port_queue_task(ap, atapi_packet_task, ap, 0); |
1da177e4 LT |
4131 | break; |
4132 | ||
4133 | case ATA_PROT_ATAPI_DMA: | |
c1389503 | 4134 | ap->flags |= ATA_FLAG_NOINTR; |
1da177e4 LT |
4135 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
4136 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
8061f5f0 | 4137 | ata_port_queue_task(ap, atapi_packet_task, ap, 0); |
1da177e4 LT |
4138 | break; |
4139 | ||
4140 | default: | |
4141 | WARN_ON(1); | |
9a3d9eb0 | 4142 | return AC_ERR_SYSTEM; |
1da177e4 LT |
4143 | } |
4144 | ||
4145 | return 0; | |
4146 | } | |
4147 | ||
1da177e4 LT |
4148 | /** |
4149 | * ata_host_intr - Handle host interrupt for given (port, task) | |
4150 | * @ap: Port on which interrupt arrived (possibly...) | |
4151 | * @qc: Taskfile currently active in engine | |
4152 | * | |
4153 | * Handle host interrupt for given queued command. Currently, | |
4154 | * only DMA interrupts are handled. All other commands are | |
4155 | * handled via polling with interrupts disabled (nIEN bit). | |
4156 | * | |
4157 | * LOCKING: | |
4158 | * spin_lock_irqsave(host_set lock) | |
4159 | * | |
4160 | * RETURNS: | |
4161 | * One if interrupt was handled, zero if not (shared irq). | |
4162 | */ | |
4163 | ||
4164 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
4165 | struct ata_queued_cmd *qc) | |
4166 | { | |
4167 | u8 status, host_stat; | |
4168 | ||
4169 | switch (qc->tf.protocol) { | |
4170 | ||
4171 | case ATA_PROT_DMA: | |
4172 | case ATA_PROT_ATAPI_DMA: | |
4173 | case ATA_PROT_ATAPI: | |
4174 | /* check status of DMA engine */ | |
4175 | host_stat = ap->ops->bmdma_status(ap); | |
4176 | VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); | |
4177 | ||
4178 | /* if it's not our irq... */ | |
4179 | if (!(host_stat & ATA_DMA_INTR)) | |
4180 | goto idle_irq; | |
4181 | ||
4182 | /* before we do anything else, clear DMA-Start bit */ | |
b73fc89f | 4183 | ap->ops->bmdma_stop(qc); |
1da177e4 LT |
4184 | |
4185 | /* fall through */ | |
4186 | ||
4187 | case ATA_PROT_ATAPI_NODATA: | |
4188 | case ATA_PROT_NODATA: | |
4189 | /* check altstatus */ | |
4190 | status = ata_altstatus(ap); | |
4191 | if (status & ATA_BUSY) | |
4192 | goto idle_irq; | |
4193 | ||
4194 | /* check main status, clearing INTRQ */ | |
4195 | status = ata_chk_status(ap); | |
4196 | if (unlikely(status & ATA_BUSY)) | |
4197 | goto idle_irq; | |
4198 | DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", | |
4199 | ap->id, qc->tf.protocol, status); | |
4200 | ||
4201 | /* ack bmdma irq events */ | |
4202 | ap->ops->irq_clear(ap); | |
4203 | ||
4204 | /* complete taskfile transaction */ | |
a22e2eb0 AL |
4205 | qc->err_mask |= ac_err_mask(status); |
4206 | ata_qc_complete(qc); | |
1da177e4 LT |
4207 | break; |
4208 | ||
4209 | default: | |
4210 | goto idle_irq; | |
4211 | } | |
4212 | ||
4213 | return 1; /* irq handled */ | |
4214 | ||
4215 | idle_irq: | |
4216 | ap->stats.idle_irq++; | |
4217 | ||
4218 | #ifdef ATA_IRQ_TRAP | |
4219 | if ((ap->stats.idle_irq % 1000) == 0) { | |
1da177e4 LT |
4220 | ata_irq_ack(ap, 0); /* debug trap */ |
4221 | printk(KERN_WARNING "ata%d: irq trap\n", ap->id); | |
23cfce89 | 4222 | return 1; |
1da177e4 LT |
4223 | } |
4224 | #endif | |
4225 | return 0; /* irq not handled */ | |
4226 | } | |
4227 | ||
4228 | /** | |
4229 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b JG |
4230 | * @irq: irq line (unused) |
4231 | * @dev_instance: pointer to our ata_host_set information structure | |
1da177e4 LT |
4232 | * @regs: unused |
4233 | * | |
0cba632b JG |
4234 | * Default interrupt handler for PCI IDE devices. Calls |
4235 | * ata_host_intr() for each port that is not disabled. | |
4236 | * | |
1da177e4 | 4237 | * LOCKING: |
0cba632b | 4238 | * Obtains host_set lock during operation. |
1da177e4 LT |
4239 | * |
4240 | * RETURNS: | |
0cba632b | 4241 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
4242 | */ |
4243 | ||
4244 | irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) | |
4245 | { | |
4246 | struct ata_host_set *host_set = dev_instance; | |
4247 | unsigned int i; | |
4248 | unsigned int handled = 0; | |
4249 | unsigned long flags; | |
4250 | ||
4251 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
4252 | spin_lock_irqsave(&host_set->lock, flags); | |
4253 | ||
4254 | for (i = 0; i < host_set->n_ports; i++) { | |
4255 | struct ata_port *ap; | |
4256 | ||
4257 | ap = host_set->ports[i]; | |
c1389503 TH |
4258 | if (ap && |
4259 | !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) { | |
1da177e4 LT |
4260 | struct ata_queued_cmd *qc; |
4261 | ||
4262 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
21b1ed74 AL |
4263 | if (qc && (!(qc->tf.ctl & ATA_NIEN)) && |
4264 | (qc->flags & ATA_QCFLAG_ACTIVE)) | |
1da177e4 LT |
4265 | handled |= ata_host_intr(ap, qc); |
4266 | } | |
4267 | } | |
4268 | ||
4269 | spin_unlock_irqrestore(&host_set->lock, flags); | |
4270 | ||
4271 | return IRQ_RETVAL(handled); | |
4272 | } | |
4273 | ||
0baab86b | 4274 | |
9b847548 JA |
4275 | /* |
4276 | * Execute a 'simple' command, that only consists of the opcode 'cmd' itself, | |
4277 | * without filling any other registers | |
4278 | */ | |
4279 | static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev, | |
4280 | u8 cmd) | |
4281 | { | |
4282 | struct ata_taskfile tf; | |
4283 | int err; | |
4284 | ||
4285 | ata_tf_init(ap, &tf, dev->devno); | |
4286 | ||
4287 | tf.command = cmd; | |
4288 | tf.flags |= ATA_TFLAG_DEVICE; | |
4289 | tf.protocol = ATA_PROT_NODATA; | |
4290 | ||
4291 | err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); | |
4292 | if (err) | |
4293 | printk(KERN_ERR "%s: ata command failed: %d\n", | |
4294 | __FUNCTION__, err); | |
4295 | ||
4296 | return err; | |
4297 | } | |
4298 | ||
4299 | static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev) | |
4300 | { | |
4301 | u8 cmd; | |
4302 | ||
4303 | if (!ata_try_flush_cache(dev)) | |
4304 | return 0; | |
4305 | ||
4306 | if (ata_id_has_flush_ext(dev->id)) | |
4307 | cmd = ATA_CMD_FLUSH_EXT; | |
4308 | else | |
4309 | cmd = ATA_CMD_FLUSH; | |
4310 | ||
4311 | return ata_do_simple_cmd(ap, dev, cmd); | |
4312 | } | |
4313 | ||
4314 | static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev) | |
4315 | { | |
4316 | return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1); | |
4317 | } | |
4318 | ||
4319 | static int ata_start_drive(struct ata_port *ap, struct ata_device *dev) | |
4320 | { | |
4321 | return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE); | |
4322 | } | |
4323 | ||
4324 | /** | |
4325 | * ata_device_resume - wakeup a previously suspended devices | |
c893a3ae RD |
4326 | * @ap: port the device is connected to |
4327 | * @dev: the device to resume | |
9b847548 JA |
4328 | * |
4329 | * Kick the drive back into action, by sending it an idle immediate | |
4330 | * command and making sure its transfer mode matches between drive | |
4331 | * and host. | |
4332 | * | |
4333 | */ | |
4334 | int ata_device_resume(struct ata_port *ap, struct ata_device *dev) | |
4335 | { | |
4336 | if (ap->flags & ATA_FLAG_SUSPENDED) { | |
4337 | ap->flags &= ~ATA_FLAG_SUSPENDED; | |
4338 | ata_set_mode(ap); | |
4339 | } | |
4340 | if (!ata_dev_present(dev)) | |
4341 | return 0; | |
4342 | if (dev->class == ATA_DEV_ATA) | |
4343 | ata_start_drive(ap, dev); | |
4344 | ||
4345 | return 0; | |
4346 | } | |
4347 | ||
4348 | /** | |
4349 | * ata_device_suspend - prepare a device for suspend | |
c893a3ae RD |
4350 | * @ap: port the device is connected to |
4351 | * @dev: the device to suspend | |
9b847548 JA |
4352 | * |
4353 | * Flush the cache on the drive, if appropriate, then issue a | |
4354 | * standbynow command. | |
9b847548 | 4355 | */ |
082776e4 | 4356 | int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state) |
9b847548 JA |
4357 | { |
4358 | if (!ata_dev_present(dev)) | |
4359 | return 0; | |
4360 | if (dev->class == ATA_DEV_ATA) | |
4361 | ata_flush_cache(ap, dev); | |
4362 | ||
082776e4 NC |
4363 | if (state.event != PM_EVENT_FREEZE) |
4364 | ata_standby_drive(ap, dev); | |
9b847548 JA |
4365 | ap->flags |= ATA_FLAG_SUSPENDED; |
4366 | return 0; | |
4367 | } | |
4368 | ||
c893a3ae RD |
4369 | /** |
4370 | * ata_port_start - Set port up for dma. | |
4371 | * @ap: Port to initialize | |
4372 | * | |
4373 | * Called just after data structures for each port are | |
4374 | * initialized. Allocates space for PRD table. | |
4375 | * | |
4376 | * May be used as the port_start() entry in ata_port_operations. | |
4377 | * | |
4378 | * LOCKING: | |
4379 | * Inherited from caller. | |
4380 | */ | |
4381 | ||
1da177e4 LT |
4382 | int ata_port_start (struct ata_port *ap) |
4383 | { | |
4384 | struct device *dev = ap->host_set->dev; | |
6037d6bb | 4385 | int rc; |
1da177e4 LT |
4386 | |
4387 | ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); | |
4388 | if (!ap->prd) | |
4389 | return -ENOMEM; | |
4390 | ||
6037d6bb JG |
4391 | rc = ata_pad_alloc(ap, dev); |
4392 | if (rc) { | |
cedc9a47 | 4393 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); |
6037d6bb | 4394 | return rc; |
cedc9a47 JG |
4395 | } |
4396 | ||
1da177e4 LT |
4397 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma); |
4398 | ||
4399 | return 0; | |
4400 | } | |
4401 | ||
0baab86b EF |
4402 | |
4403 | /** | |
4404 | * ata_port_stop - Undo ata_port_start() | |
4405 | * @ap: Port to shut down | |
4406 | * | |
4407 | * Frees the PRD table. | |
4408 | * | |
4409 | * May be used as the port_stop() entry in ata_port_operations. | |
4410 | * | |
4411 | * LOCKING: | |
6f0ef4fa | 4412 | * Inherited from caller. |
0baab86b EF |
4413 | */ |
4414 | ||
1da177e4 LT |
4415 | void ata_port_stop (struct ata_port *ap) |
4416 | { | |
4417 | struct device *dev = ap->host_set->dev; | |
4418 | ||
4419 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); | |
6037d6bb | 4420 | ata_pad_free(ap, dev); |
1da177e4 LT |
4421 | } |
4422 | ||
aa8f0dc6 JG |
4423 | void ata_host_stop (struct ata_host_set *host_set) |
4424 | { | |
4425 | if (host_set->mmio_base) | |
4426 | iounmap(host_set->mmio_base); | |
4427 | } | |
4428 | ||
4429 | ||
1da177e4 LT |
4430 | /** |
4431 | * ata_host_remove - Unregister SCSI host structure with upper layers | |
4432 | * @ap: Port to unregister | |
4433 | * @do_unregister: 1 if we fully unregister, 0 to just stop the port | |
4434 | * | |
4435 | * LOCKING: | |
6f0ef4fa | 4436 | * Inherited from caller. |
1da177e4 LT |
4437 | */ |
4438 | ||
4439 | static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) | |
4440 | { | |
4441 | struct Scsi_Host *sh = ap->host; | |
4442 | ||
4443 | DPRINTK("ENTER\n"); | |
4444 | ||
4445 | if (do_unregister) | |
4446 | scsi_remove_host(sh); | |
4447 | ||
4448 | ap->ops->port_stop(ap); | |
4449 | } | |
4450 | ||
4451 | /** | |
4452 | * ata_host_init - Initialize an ata_port structure | |
4453 | * @ap: Structure to initialize | |
4454 | * @host: associated SCSI mid-layer structure | |
4455 | * @host_set: Collection of hosts to which @ap belongs | |
4456 | * @ent: Probe information provided by low-level driver | |
4457 | * @port_no: Port number associated with this ata_port | |
4458 | * | |
0cba632b JG |
4459 | * Initialize a new ata_port structure, and its associated |
4460 | * scsi_host. | |
4461 | * | |
1da177e4 | 4462 | * LOCKING: |
0cba632b | 4463 | * Inherited from caller. |
1da177e4 LT |
4464 | */ |
4465 | ||
4466 | static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, | |
4467 | struct ata_host_set *host_set, | |
057ace5e | 4468 | const struct ata_probe_ent *ent, unsigned int port_no) |
1da177e4 LT |
4469 | { |
4470 | unsigned int i; | |
4471 | ||
4472 | host->max_id = 16; | |
4473 | host->max_lun = 1; | |
4474 | host->max_channel = 1; | |
4475 | host->unique_id = ata_unique_id++; | |
4476 | host->max_cmd_len = 12; | |
12413197 | 4477 | |
1da177e4 LT |
4478 | ap->flags = ATA_FLAG_PORT_DISABLED; |
4479 | ap->id = host->unique_id; | |
4480 | ap->host = host; | |
4481 | ap->ctl = ATA_DEVCTL_OBS; | |
4482 | ap->host_set = host_set; | |
4483 | ap->port_no = port_no; | |
4484 | ap->hard_port_no = | |
4485 | ent->legacy_mode ? ent->hard_port_no : port_no; | |
4486 | ap->pio_mask = ent->pio_mask; | |
4487 | ap->mwdma_mask = ent->mwdma_mask; | |
4488 | ap->udma_mask = ent->udma_mask; | |
4489 | ap->flags |= ent->host_flags; | |
4490 | ap->ops = ent->port_ops; | |
4491 | ap->cbl = ATA_CBL_NONE; | |
4492 | ap->active_tag = ATA_TAG_POISON; | |
4493 | ap->last_ctl = 0xFF; | |
4494 | ||
86e45b6b | 4495 | INIT_WORK(&ap->port_task, NULL, NULL); |
a72ec4ce | 4496 | INIT_LIST_HEAD(&ap->eh_done_q); |
1da177e4 | 4497 | |
acf356b1 TH |
4498 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
4499 | struct ata_device *dev = &ap->device[i]; | |
4500 | dev->devno = i; | |
4501 | dev->pio_mask = UINT_MAX; | |
4502 | dev->mwdma_mask = UINT_MAX; | |
4503 | dev->udma_mask = UINT_MAX; | |
4504 | } | |
1da177e4 LT |
4505 | |
4506 | #ifdef ATA_IRQ_TRAP | |
4507 | ap->stats.unhandled_irq = 1; | |
4508 | ap->stats.idle_irq = 1; | |
4509 | #endif | |
4510 | ||
4511 | memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); | |
4512 | } | |
4513 | ||
4514 | /** | |
4515 | * ata_host_add - Attach low-level ATA driver to system | |
4516 | * @ent: Information provided by low-level driver | |
4517 | * @host_set: Collections of ports to which we add | |
4518 | * @port_no: Port number associated with this host | |
4519 | * | |
0cba632b JG |
4520 | * Attach low-level ATA driver to system. |
4521 | * | |
1da177e4 | 4522 | * LOCKING: |
0cba632b | 4523 | * PCI/etc. bus probe sem. |
1da177e4 LT |
4524 | * |
4525 | * RETURNS: | |
0cba632b | 4526 | * New ata_port on success, for NULL on error. |
1da177e4 LT |
4527 | */ |
4528 | ||
057ace5e | 4529 | static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, |
1da177e4 LT |
4530 | struct ata_host_set *host_set, |
4531 | unsigned int port_no) | |
4532 | { | |
4533 | struct Scsi_Host *host; | |
4534 | struct ata_port *ap; | |
4535 | int rc; | |
4536 | ||
4537 | DPRINTK("ENTER\n"); | |
4538 | host = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); | |
4539 | if (!host) | |
4540 | return NULL; | |
4541 | ||
30afc84c TH |
4542 | host->transportt = &ata_scsi_transport_template; |
4543 | ||
1da177e4 LT |
4544 | ap = (struct ata_port *) &host->hostdata[0]; |
4545 | ||
4546 | ata_host_init(ap, host, host_set, ent, port_no); | |
4547 | ||
4548 | rc = ap->ops->port_start(ap); | |
4549 | if (rc) | |
4550 | goto err_out; | |
4551 | ||
4552 | return ap; | |
4553 | ||
4554 | err_out: | |
4555 | scsi_host_put(host); | |
4556 | return NULL; | |
4557 | } | |
4558 | ||
4559 | /** | |
0cba632b JG |
4560 | * ata_device_add - Register hardware device with ATA and SCSI layers |
4561 | * @ent: Probe information describing hardware device to be registered | |
4562 | * | |
4563 | * This function processes the information provided in the probe | |
4564 | * information struct @ent, allocates the necessary ATA and SCSI | |
4565 | * host information structures, initializes them, and registers | |
4566 | * everything with requisite kernel subsystems. | |
4567 | * | |
4568 | * This function requests irqs, probes the ATA bus, and probes | |
4569 | * the SCSI bus. | |
1da177e4 LT |
4570 | * |
4571 | * LOCKING: | |
0cba632b | 4572 | * PCI/etc. bus probe sem. |
1da177e4 LT |
4573 | * |
4574 | * RETURNS: | |
0cba632b | 4575 | * Number of ports registered. Zero on error (no ports registered). |
1da177e4 LT |
4576 | */ |
4577 | ||
057ace5e | 4578 | int ata_device_add(const struct ata_probe_ent *ent) |
1da177e4 LT |
4579 | { |
4580 | unsigned int count = 0, i; | |
4581 | struct device *dev = ent->dev; | |
4582 | struct ata_host_set *host_set; | |
4583 | ||
4584 | DPRINTK("ENTER\n"); | |
4585 | /* alloc a container for our list of ATA ports (buses) */ | |
57f3bda8 | 4586 | host_set = kzalloc(sizeof(struct ata_host_set) + |
1da177e4 LT |
4587 | (ent->n_ports * sizeof(void *)), GFP_KERNEL); |
4588 | if (!host_set) | |
4589 | return 0; | |
1da177e4 LT |
4590 | spin_lock_init(&host_set->lock); |
4591 | ||
4592 | host_set->dev = dev; | |
4593 | host_set->n_ports = ent->n_ports; | |
4594 | host_set->irq = ent->irq; | |
4595 | host_set->mmio_base = ent->mmio_base; | |
4596 | host_set->private_data = ent->private_data; | |
4597 | host_set->ops = ent->port_ops; | |
4598 | ||
4599 | /* register each port bound to this device */ | |
4600 | for (i = 0; i < ent->n_ports; i++) { | |
4601 | struct ata_port *ap; | |
4602 | unsigned long xfer_mode_mask; | |
4603 | ||
4604 | ap = ata_host_add(ent, host_set, i); | |
4605 | if (!ap) | |
4606 | goto err_out; | |
4607 | ||
4608 | host_set->ports[i] = ap; | |
4609 | xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | | |
4610 | (ap->mwdma_mask << ATA_SHIFT_MWDMA) | | |
4611 | (ap->pio_mask << ATA_SHIFT_PIO); | |
4612 | ||
4613 | /* print per-port info to dmesg */ | |
4614 | printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX " | |
4615 | "bmdma 0x%lX irq %lu\n", | |
4616 | ap->id, | |
4617 | ap->flags & ATA_FLAG_SATA ? 'S' : 'P', | |
4618 | ata_mode_string(xfer_mode_mask), | |
4619 | ap->ioaddr.cmd_addr, | |
4620 | ap->ioaddr.ctl_addr, | |
4621 | ap->ioaddr.bmdma_addr, | |
4622 | ent->irq); | |
4623 | ||
4624 | ata_chk_status(ap); | |
4625 | host_set->ops->irq_clear(ap); | |
4626 | count++; | |
4627 | } | |
4628 | ||
57f3bda8 RD |
4629 | if (!count) |
4630 | goto err_free_ret; | |
1da177e4 LT |
4631 | |
4632 | /* obtain irq, that is shared between channels */ | |
4633 | if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags, | |
4634 | DRV_NAME, host_set)) | |
4635 | goto err_out; | |
4636 | ||
4637 | /* perform each probe synchronously */ | |
4638 | DPRINTK("probe begin\n"); | |
4639 | for (i = 0; i < count; i++) { | |
4640 | struct ata_port *ap; | |
4641 | int rc; | |
4642 | ||
4643 | ap = host_set->ports[i]; | |
4644 | ||
c893a3ae | 4645 | DPRINTK("ata%u: bus probe begin\n", ap->id); |
1da177e4 | 4646 | rc = ata_bus_probe(ap); |
c893a3ae | 4647 | DPRINTK("ata%u: bus probe end\n", ap->id); |
1da177e4 LT |
4648 | |
4649 | if (rc) { | |
4650 | /* FIXME: do something useful here? | |
4651 | * Current libata behavior will | |
4652 | * tear down everything when | |
4653 | * the module is removed | |
4654 | * or the h/w is unplugged. | |
4655 | */ | |
4656 | } | |
4657 | ||
4658 | rc = scsi_add_host(ap->host, dev); | |
4659 | if (rc) { | |
4660 | printk(KERN_ERR "ata%u: scsi_add_host failed\n", | |
4661 | ap->id); | |
4662 | /* FIXME: do something useful here */ | |
4663 | /* FIXME: handle unconditional calls to | |
4664 | * scsi_scan_host and ata_host_remove, below, | |
4665 | * at the very least | |
4666 | */ | |
4667 | } | |
4668 | } | |
4669 | ||
4670 | /* probes are done, now scan each port's disk(s) */ | |
c893a3ae | 4671 | DPRINTK("host probe begin\n"); |
1da177e4 LT |
4672 | for (i = 0; i < count; i++) { |
4673 | struct ata_port *ap = host_set->ports[i]; | |
4674 | ||
644dd0cc | 4675 | ata_scsi_scan_host(ap); |
1da177e4 LT |
4676 | } |
4677 | ||
4678 | dev_set_drvdata(dev, host_set); | |
4679 | ||
4680 | VPRINTK("EXIT, returning %u\n", ent->n_ports); | |
4681 | return ent->n_ports; /* success */ | |
4682 | ||
4683 | err_out: | |
4684 | for (i = 0; i < count; i++) { | |
4685 | ata_host_remove(host_set->ports[i], 1); | |
4686 | scsi_host_put(host_set->ports[i]->host); | |
4687 | } | |
57f3bda8 | 4688 | err_free_ret: |
1da177e4 LT |
4689 | kfree(host_set); |
4690 | VPRINTK("EXIT, returning 0\n"); | |
4691 | return 0; | |
4692 | } | |
4693 | ||
17b14451 AC |
4694 | /** |
4695 | * ata_host_set_remove - PCI layer callback for device removal | |
4696 | * @host_set: ATA host set that was removed | |
4697 | * | |
2e9edbf8 | 4698 | * Unregister all objects associated with this host set. Free those |
17b14451 AC |
4699 | * objects. |
4700 | * | |
4701 | * LOCKING: | |
4702 | * Inherited from calling layer (may sleep). | |
4703 | */ | |
4704 | ||
17b14451 AC |
4705 | void ata_host_set_remove(struct ata_host_set *host_set) |
4706 | { | |
4707 | struct ata_port *ap; | |
4708 | unsigned int i; | |
4709 | ||
4710 | for (i = 0; i < host_set->n_ports; i++) { | |
4711 | ap = host_set->ports[i]; | |
4712 | scsi_remove_host(ap->host); | |
4713 | } | |
4714 | ||
4715 | free_irq(host_set->irq, host_set); | |
4716 | ||
4717 | for (i = 0; i < host_set->n_ports; i++) { | |
4718 | ap = host_set->ports[i]; | |
4719 | ||
4720 | ata_scsi_release(ap->host); | |
4721 | ||
4722 | if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) { | |
4723 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
4724 | ||
4725 | if (ioaddr->cmd_addr == 0x1f0) | |
4726 | release_region(0x1f0, 8); | |
4727 | else if (ioaddr->cmd_addr == 0x170) | |
4728 | release_region(0x170, 8); | |
4729 | } | |
4730 | ||
4731 | scsi_host_put(ap->host); | |
4732 | } | |
4733 | ||
4734 | if (host_set->ops->host_stop) | |
4735 | host_set->ops->host_stop(host_set); | |
4736 | ||
4737 | kfree(host_set); | |
4738 | } | |
4739 | ||
1da177e4 LT |
4740 | /** |
4741 | * ata_scsi_release - SCSI layer callback hook for host unload | |
4742 | * @host: libata host to be unloaded | |
4743 | * | |
4744 | * Performs all duties necessary to shut down a libata port... | |
4745 | * Kill port kthread, disable port, and release resources. | |
4746 | * | |
4747 | * LOCKING: | |
4748 | * Inherited from SCSI layer. | |
4749 | * | |
4750 | * RETURNS: | |
4751 | * One. | |
4752 | */ | |
4753 | ||
4754 | int ata_scsi_release(struct Scsi_Host *host) | |
4755 | { | |
4756 | struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; | |
d9572b1d | 4757 | int i; |
1da177e4 LT |
4758 | |
4759 | DPRINTK("ENTER\n"); | |
4760 | ||
4761 | ap->ops->port_disable(ap); | |
4762 | ata_host_remove(ap, 0); | |
d9572b1d TH |
4763 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
4764 | kfree(ap->device[i].id); | |
1da177e4 LT |
4765 | |
4766 | DPRINTK("EXIT\n"); | |
4767 | return 1; | |
4768 | } | |
4769 | ||
4770 | /** | |
4771 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
4772 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
4773 | * |
4774 | * Utility function which initializes data_addr, error_addr, | |
4775 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
4776 | * device_addr, status_addr, and command_addr to standard offsets | |
4777 | * relative to cmd_addr. | |
4778 | * | |
4779 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 4780 | */ |
0baab86b | 4781 | |
1da177e4 LT |
4782 | void ata_std_ports(struct ata_ioports *ioaddr) |
4783 | { | |
4784 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
4785 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
4786 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
4787 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
4788 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
4789 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
4790 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
4791 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
4792 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
4793 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
4794 | } | |
4795 | ||
0baab86b | 4796 | |
374b1873 JG |
4797 | #ifdef CONFIG_PCI |
4798 | ||
4799 | void ata_pci_host_stop (struct ata_host_set *host_set) | |
4800 | { | |
4801 | struct pci_dev *pdev = to_pci_dev(host_set->dev); | |
4802 | ||
4803 | pci_iounmap(pdev, host_set->mmio_base); | |
4804 | } | |
4805 | ||
1da177e4 LT |
4806 | /** |
4807 | * ata_pci_remove_one - PCI layer callback for device removal | |
4808 | * @pdev: PCI device that was removed | |
4809 | * | |
4810 | * PCI layer indicates to libata via this hook that | |
6f0ef4fa | 4811 | * hot-unplug or module unload event has occurred. |
1da177e4 LT |
4812 | * Handle this by unregistering all objects associated |
4813 | * with this PCI device. Free those objects. Then finally | |
4814 | * release PCI resources and disable device. | |
4815 | * | |
4816 | * LOCKING: | |
4817 | * Inherited from PCI layer (may sleep). | |
4818 | */ | |
4819 | ||
4820 | void ata_pci_remove_one (struct pci_dev *pdev) | |
4821 | { | |
4822 | struct device *dev = pci_dev_to_dev(pdev); | |
4823 | struct ata_host_set *host_set = dev_get_drvdata(dev); | |
1da177e4 | 4824 | |
17b14451 | 4825 | ata_host_set_remove(host_set); |
1da177e4 LT |
4826 | pci_release_regions(pdev); |
4827 | pci_disable_device(pdev); | |
4828 | dev_set_drvdata(dev, NULL); | |
4829 | } | |
4830 | ||
4831 | /* move to PCI subsystem */ | |
057ace5e | 4832 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
4833 | { |
4834 | unsigned long tmp = 0; | |
4835 | ||
4836 | switch (bits->width) { | |
4837 | case 1: { | |
4838 | u8 tmp8 = 0; | |
4839 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
4840 | tmp = tmp8; | |
4841 | break; | |
4842 | } | |
4843 | case 2: { | |
4844 | u16 tmp16 = 0; | |
4845 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
4846 | tmp = tmp16; | |
4847 | break; | |
4848 | } | |
4849 | case 4: { | |
4850 | u32 tmp32 = 0; | |
4851 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
4852 | tmp = tmp32; | |
4853 | break; | |
4854 | } | |
4855 | ||
4856 | default: | |
4857 | return -EINVAL; | |
4858 | } | |
4859 | ||
4860 | tmp &= bits->mask; | |
4861 | ||
4862 | return (tmp == bits->val) ? 1 : 0; | |
4863 | } | |
9b847548 JA |
4864 | |
4865 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state) | |
4866 | { | |
4867 | pci_save_state(pdev); | |
4868 | pci_disable_device(pdev); | |
4869 | pci_set_power_state(pdev, PCI_D3hot); | |
4870 | return 0; | |
4871 | } | |
4872 | ||
4873 | int ata_pci_device_resume(struct pci_dev *pdev) | |
4874 | { | |
4875 | pci_set_power_state(pdev, PCI_D0); | |
4876 | pci_restore_state(pdev); | |
4877 | pci_enable_device(pdev); | |
4878 | pci_set_master(pdev); | |
4879 | return 0; | |
4880 | } | |
1da177e4 LT |
4881 | #endif /* CONFIG_PCI */ |
4882 | ||
4883 | ||
1da177e4 LT |
4884 | static int __init ata_init(void) |
4885 | { | |
4886 | ata_wq = create_workqueue("ata"); | |
4887 | if (!ata_wq) | |
4888 | return -ENOMEM; | |
4889 | ||
4890 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); | |
4891 | return 0; | |
4892 | } | |
4893 | ||
4894 | static void __exit ata_exit(void) | |
4895 | { | |
4896 | destroy_workqueue(ata_wq); | |
4897 | } | |
4898 | ||
4899 | module_init(ata_init); | |
4900 | module_exit(ata_exit); | |
4901 | ||
67846b30 JG |
4902 | static unsigned long ratelimit_time; |
4903 | static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED; | |
4904 | ||
4905 | int ata_ratelimit(void) | |
4906 | { | |
4907 | int rc; | |
4908 | unsigned long flags; | |
4909 | ||
4910 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
4911 | ||
4912 | if (time_after(jiffies, ratelimit_time)) { | |
4913 | rc = 1; | |
4914 | ratelimit_time = jiffies + (HZ/5); | |
4915 | } else | |
4916 | rc = 0; | |
4917 | ||
4918 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
4919 | ||
4920 | return rc; | |
4921 | } | |
4922 | ||
1da177e4 LT |
4923 | /* |
4924 | * libata is essentially a library of internal helper functions for | |
4925 | * low-level ATA host controller drivers. As such, the API/ABI is | |
4926 | * likely to change as new drivers are added and updated. | |
4927 | * Do not depend on ABI/API stability. | |
4928 | */ | |
4929 | ||
4930 | EXPORT_SYMBOL_GPL(ata_std_bios_param); | |
4931 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
4932 | EXPORT_SYMBOL_GPL(ata_device_add); | |
17b14451 | 4933 | EXPORT_SYMBOL_GPL(ata_host_set_remove); |
1da177e4 LT |
4934 | EXPORT_SYMBOL_GPL(ata_sg_init); |
4935 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
76014427 | 4936 | EXPORT_SYMBOL_GPL(__ata_qc_complete); |
1da177e4 LT |
4937 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
4938 | EXPORT_SYMBOL_GPL(ata_eng_timeout); | |
4939 | EXPORT_SYMBOL_GPL(ata_tf_load); | |
4940 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
4941 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
4942 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
4943 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); | |
4944 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
4945 | EXPORT_SYMBOL_GPL(ata_check_status); | |
4946 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
4947 | EXPORT_SYMBOL_GPL(ata_exec_command); |
4948 | EXPORT_SYMBOL_GPL(ata_port_start); | |
4949 | EXPORT_SYMBOL_GPL(ata_port_stop); | |
aa8f0dc6 | 4950 | EXPORT_SYMBOL_GPL(ata_host_stop); |
1da177e4 LT |
4951 | EXPORT_SYMBOL_GPL(ata_interrupt); |
4952 | EXPORT_SYMBOL_GPL(ata_qc_prep); | |
e46834cd | 4953 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
4954 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
4955 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
4956 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
4957 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
4958 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
4959 | EXPORT_SYMBOL_GPL(ata_port_probe); | |
4960 | EXPORT_SYMBOL_GPL(sata_phy_reset); | |
4961 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
4962 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
8a19ac89 | 4963 | EXPORT_SYMBOL_GPL(ata_std_probeinit); |
c2bd5804 TH |
4964 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
4965 | EXPORT_SYMBOL_GPL(sata_std_hardreset); | |
4966 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
4967 | EXPORT_SYMBOL_GPL(ata_std_probe_reset); | |
a62c0fc5 | 4968 | EXPORT_SYMBOL_GPL(ata_drive_probe_reset); |
623a3128 | 4969 | EXPORT_SYMBOL_GPL(ata_dev_revalidate); |
2e9edbf8 JG |
4970 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
4971 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 4972 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 4973 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
6f8b9958 | 4974 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
86e45b6b | 4975 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
1da177e4 LT |
4976 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
4977 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
4978 | EXPORT_SYMBOL_GPL(ata_scsi_error); | |
4979 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); | |
4980 | EXPORT_SYMBOL_GPL(ata_scsi_release); | |
4981 | EXPORT_SYMBOL_GPL(ata_host_intr); | |
6a62a04d TH |
4982 | EXPORT_SYMBOL_GPL(ata_id_string); |
4983 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
1da177e4 | 4984 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
a72ec4ce TH |
4985 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
4986 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
1da177e4 | 4987 | |
1bc4ccff | 4988 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
4989 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
4990 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
4991 | ||
1da177e4 LT |
4992 | #ifdef CONFIG_PCI |
4993 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
374b1873 | 4994 | EXPORT_SYMBOL_GPL(ata_pci_host_stop); |
1da177e4 LT |
4995 | EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); |
4996 | EXPORT_SYMBOL_GPL(ata_pci_init_one); | |
4997 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
9b847548 JA |
4998 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
4999 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
67951ade AC |
5000 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
5001 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 5002 | #endif /* CONFIG_PCI */ |
9b847548 JA |
5003 | |
5004 | EXPORT_SYMBOL_GPL(ata_device_suspend); | |
5005 | EXPORT_SYMBOL_GPL(ata_device_resume); | |
5006 | EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); | |
5007 | EXPORT_SYMBOL_GPL(ata_scsi_device_resume); |