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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 | 64 | static unsigned int ata_dev_init_params(struct ata_port *ap, |
00b6f5e9 AL |
65 | struct ata_device *dev, |
66 | u16 heads, | |
67 | u16 sectors); | |
83206a29 TH |
68 | static unsigned int ata_dev_set_xfermode(struct ata_port *ap, |
69 | struct ata_device *dev); | |
acf356b1 | 70 | static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev); |
1da177e4 LT |
71 | |
72 | static unsigned int ata_unique_id = 1; | |
73 | static struct workqueue_struct *ata_wq; | |
74 | ||
418dc1f5 | 75 | int atapi_enabled = 1; |
1623c81e JG |
76 | module_param(atapi_enabled, int, 0444); |
77 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
78 | ||
c3c013a2 JG |
79 | int libata_fua = 0; |
80 | module_param_named(fua, libata_fua, int, 0444); | |
81 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
82 | ||
1da177e4 LT |
83 | MODULE_AUTHOR("Jeff Garzik"); |
84 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
85 | MODULE_LICENSE("GPL"); | |
86 | MODULE_VERSION(DRV_VERSION); | |
87 | ||
0baab86b | 88 | |
1da177e4 LT |
89 | /** |
90 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
91 | * @tf: Taskfile to convert | |
92 | * @fis: Buffer into which data will output | |
93 | * @pmp: Port multiplier port | |
94 | * | |
95 | * Converts a standard ATA taskfile to a Serial ATA | |
96 | * FIS structure (Register - Host to Device). | |
97 | * | |
98 | * LOCKING: | |
99 | * Inherited from caller. | |
100 | */ | |
101 | ||
057ace5e | 102 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) |
1da177e4 LT |
103 | { |
104 | fis[0] = 0x27; /* Register - Host to Device FIS */ | |
105 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, | |
106 | bit 7 indicates Command FIS */ | |
107 | fis[2] = tf->command; | |
108 | fis[3] = tf->feature; | |
109 | ||
110 | fis[4] = tf->lbal; | |
111 | fis[5] = tf->lbam; | |
112 | fis[6] = tf->lbah; | |
113 | fis[7] = tf->device; | |
114 | ||
115 | fis[8] = tf->hob_lbal; | |
116 | fis[9] = tf->hob_lbam; | |
117 | fis[10] = tf->hob_lbah; | |
118 | fis[11] = tf->hob_feature; | |
119 | ||
120 | fis[12] = tf->nsect; | |
121 | fis[13] = tf->hob_nsect; | |
122 | fis[14] = 0; | |
123 | fis[15] = tf->ctl; | |
124 | ||
125 | fis[16] = 0; | |
126 | fis[17] = 0; | |
127 | fis[18] = 0; | |
128 | fis[19] = 0; | |
129 | } | |
130 | ||
131 | /** | |
132 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
133 | * @fis: Buffer from which data will be input | |
134 | * @tf: Taskfile to output | |
135 | * | |
e12a1be6 | 136 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
137 | * |
138 | * LOCKING: | |
139 | * Inherited from caller. | |
140 | */ | |
141 | ||
057ace5e | 142 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
143 | { |
144 | tf->command = fis[2]; /* status */ | |
145 | tf->feature = fis[3]; /* error */ | |
146 | ||
147 | tf->lbal = fis[4]; | |
148 | tf->lbam = fis[5]; | |
149 | tf->lbah = fis[6]; | |
150 | tf->device = fis[7]; | |
151 | ||
152 | tf->hob_lbal = fis[8]; | |
153 | tf->hob_lbam = fis[9]; | |
154 | tf->hob_lbah = fis[10]; | |
155 | ||
156 | tf->nsect = fis[12]; | |
157 | tf->hob_nsect = fis[13]; | |
158 | } | |
159 | ||
8cbd6df1 AL |
160 | static const u8 ata_rw_cmds[] = { |
161 | /* pio multi */ | |
162 | ATA_CMD_READ_MULTI, | |
163 | ATA_CMD_WRITE_MULTI, | |
164 | ATA_CMD_READ_MULTI_EXT, | |
165 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
166 | 0, |
167 | 0, | |
168 | 0, | |
169 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
170 | /* pio */ |
171 | ATA_CMD_PIO_READ, | |
172 | ATA_CMD_PIO_WRITE, | |
173 | ATA_CMD_PIO_READ_EXT, | |
174 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
175 | 0, |
176 | 0, | |
177 | 0, | |
178 | 0, | |
8cbd6df1 AL |
179 | /* dma */ |
180 | ATA_CMD_READ, | |
181 | ATA_CMD_WRITE, | |
182 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
183 | ATA_CMD_WRITE_EXT, |
184 | 0, | |
185 | 0, | |
186 | 0, | |
187 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 188 | }; |
1da177e4 LT |
189 | |
190 | /** | |
8cbd6df1 AL |
191 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
192 | * @qc: command to examine and configure | |
1da177e4 | 193 | * |
2e9edbf8 | 194 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 195 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
196 | * |
197 | * LOCKING: | |
198 | * caller. | |
199 | */ | |
9a3dccc4 | 200 | int ata_rwcmd_protocol(struct ata_queued_cmd *qc) |
1da177e4 | 201 | { |
8cbd6df1 AL |
202 | struct ata_taskfile *tf = &qc->tf; |
203 | struct ata_device *dev = qc->dev; | |
9a3dccc4 | 204 | u8 cmd; |
1da177e4 | 205 | |
9a3dccc4 | 206 | int index, fua, lba48, write; |
2e9edbf8 | 207 | |
9a3dccc4 | 208 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
209 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
210 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 211 | |
8cbd6df1 AL |
212 | if (dev->flags & ATA_DFLAG_PIO) { |
213 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 214 | index = dev->multi_count ? 0 : 8; |
8d238e01 AC |
215 | } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) { |
216 | /* Unable to use DMA due to host limitation */ | |
217 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 218 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
219 | } else { |
220 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 221 | index = 16; |
8cbd6df1 | 222 | } |
1da177e4 | 223 | |
9a3dccc4 TH |
224 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
225 | if (cmd) { | |
226 | tf->command = cmd; | |
227 | return 0; | |
228 | } | |
229 | return -1; | |
1da177e4 LT |
230 | } |
231 | ||
cb95d562 TH |
232 | /** |
233 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
234 | * @pio_mask: pio_mask | |
235 | * @mwdma_mask: mwdma_mask | |
236 | * @udma_mask: udma_mask | |
237 | * | |
238 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
239 | * unsigned int xfer_mask. | |
240 | * | |
241 | * LOCKING: | |
242 | * None. | |
243 | * | |
244 | * RETURNS: | |
245 | * Packed xfer_mask. | |
246 | */ | |
247 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
248 | unsigned int mwdma_mask, | |
249 | unsigned int udma_mask) | |
250 | { | |
251 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
252 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
253 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
254 | } | |
255 | ||
c0489e4e TH |
256 | /** |
257 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
258 | * @xfer_mask: xfer_mask to unpack | |
259 | * @pio_mask: resulting pio_mask | |
260 | * @mwdma_mask: resulting mwdma_mask | |
261 | * @udma_mask: resulting udma_mask | |
262 | * | |
263 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
264 | * Any NULL distination masks will be ignored. | |
265 | */ | |
266 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
267 | unsigned int *pio_mask, | |
268 | unsigned int *mwdma_mask, | |
269 | unsigned int *udma_mask) | |
270 | { | |
271 | if (pio_mask) | |
272 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
273 | if (mwdma_mask) | |
274 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
275 | if (udma_mask) | |
276 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
277 | } | |
278 | ||
cb95d562 | 279 | static const struct ata_xfer_ent { |
be9a50c8 | 280 | int shift, bits; |
cb95d562 TH |
281 | u8 base; |
282 | } ata_xfer_tbl[] = { | |
283 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
284 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
285 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
286 | { -1, }, | |
287 | }; | |
288 | ||
289 | /** | |
290 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
291 | * @xfer_mask: xfer_mask of interest | |
292 | * | |
293 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
294 | * bit of @xfer_mask is considered. | |
295 | * | |
296 | * LOCKING: | |
297 | * None. | |
298 | * | |
299 | * RETURNS: | |
300 | * Matching XFER_* value, 0 if no match found. | |
301 | */ | |
302 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
303 | { | |
304 | int highbit = fls(xfer_mask) - 1; | |
305 | const struct ata_xfer_ent *ent; | |
306 | ||
307 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
308 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
309 | return ent->base + highbit - ent->shift; | |
310 | return 0; | |
311 | } | |
312 | ||
313 | /** | |
314 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
315 | * @xfer_mode: XFER_* of interest | |
316 | * | |
317 | * Return matching xfer_mask for @xfer_mode. | |
318 | * | |
319 | * LOCKING: | |
320 | * None. | |
321 | * | |
322 | * RETURNS: | |
323 | * Matching xfer_mask, 0 if no match found. | |
324 | */ | |
325 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
326 | { | |
327 | const struct ata_xfer_ent *ent; | |
328 | ||
329 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
330 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
331 | return 1 << (ent->shift + xfer_mode - ent->base); | |
332 | return 0; | |
333 | } | |
334 | ||
335 | /** | |
336 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
337 | * @xfer_mode: XFER_* of interest | |
338 | * | |
339 | * Return matching xfer_shift for @xfer_mode. | |
340 | * | |
341 | * LOCKING: | |
342 | * None. | |
343 | * | |
344 | * RETURNS: | |
345 | * Matching xfer_shift, -1 if no match found. | |
346 | */ | |
347 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
348 | { | |
349 | const struct ata_xfer_ent *ent; | |
350 | ||
351 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
352 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
353 | return ent->shift; | |
354 | return -1; | |
355 | } | |
356 | ||
1da177e4 | 357 | /** |
1da7b0d0 TH |
358 | * ata_mode_string - convert xfer_mask to string |
359 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
360 | * |
361 | * Determine string which represents the highest speed | |
1da7b0d0 | 362 | * (highest bit in @modemask). |
1da177e4 LT |
363 | * |
364 | * LOCKING: | |
365 | * None. | |
366 | * | |
367 | * RETURNS: | |
368 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 369 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 370 | */ |
1da7b0d0 | 371 | static const char *ata_mode_string(unsigned int xfer_mask) |
1da177e4 | 372 | { |
75f554bc TH |
373 | static const char * const xfer_mode_str[] = { |
374 | "PIO0", | |
375 | "PIO1", | |
376 | "PIO2", | |
377 | "PIO3", | |
378 | "PIO4", | |
379 | "MWDMA0", | |
380 | "MWDMA1", | |
381 | "MWDMA2", | |
382 | "UDMA/16", | |
383 | "UDMA/25", | |
384 | "UDMA/33", | |
385 | "UDMA/44", | |
386 | "UDMA/66", | |
387 | "UDMA/100", | |
388 | "UDMA/133", | |
389 | "UDMA7", | |
390 | }; | |
1da7b0d0 | 391 | int highbit; |
1da177e4 | 392 | |
1da7b0d0 TH |
393 | highbit = fls(xfer_mask) - 1; |
394 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
395 | return xfer_mode_str[highbit]; | |
1da177e4 | 396 | return "<n/a>"; |
1da177e4 LT |
397 | } |
398 | ||
4c360c81 TH |
399 | static const char *sata_spd_string(unsigned int spd) |
400 | { | |
401 | static const char * const spd_str[] = { | |
402 | "1.5 Gbps", | |
403 | "3.0 Gbps", | |
404 | }; | |
405 | ||
406 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
407 | return "<unknown>"; | |
408 | return spd_str[spd - 1]; | |
409 | } | |
410 | ||
1ad8e7f9 | 411 | void ata_dev_disable(struct ata_port *ap, struct ata_device *dev) |
0b8efb0a | 412 | { |
e1211e3f | 413 | if (ata_dev_enabled(dev)) { |
0b8efb0a TH |
414 | printk(KERN_WARNING "ata%u: dev %u disabled\n", |
415 | ap->id, dev->devno); | |
416 | dev->class++; | |
417 | } | |
418 | } | |
419 | ||
1da177e4 LT |
420 | /** |
421 | * ata_pio_devchk - PATA device presence detection | |
422 | * @ap: ATA channel to examine | |
423 | * @device: Device to examine (starting at zero) | |
424 | * | |
425 | * This technique was originally described in | |
426 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
427 | * later found its way into the ATA/ATAPI spec. | |
428 | * | |
429 | * Write a pattern to the ATA shadow registers, | |
430 | * and if a device is present, it will respond by | |
431 | * correctly storing and echoing back the | |
432 | * ATA shadow register contents. | |
433 | * | |
434 | * LOCKING: | |
435 | * caller. | |
436 | */ | |
437 | ||
438 | static unsigned int ata_pio_devchk(struct ata_port *ap, | |
439 | unsigned int device) | |
440 | { | |
441 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
442 | u8 nsect, lbal; | |
443 | ||
444 | ap->ops->dev_select(ap, device); | |
445 | ||
446 | outb(0x55, ioaddr->nsect_addr); | |
447 | outb(0xaa, ioaddr->lbal_addr); | |
448 | ||
449 | outb(0xaa, ioaddr->nsect_addr); | |
450 | outb(0x55, ioaddr->lbal_addr); | |
451 | ||
452 | outb(0x55, ioaddr->nsect_addr); | |
453 | outb(0xaa, ioaddr->lbal_addr); | |
454 | ||
455 | nsect = inb(ioaddr->nsect_addr); | |
456 | lbal = inb(ioaddr->lbal_addr); | |
457 | ||
458 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
459 | return 1; /* we found a device */ | |
460 | ||
461 | return 0; /* nothing found */ | |
462 | } | |
463 | ||
464 | /** | |
465 | * ata_mmio_devchk - PATA device presence detection | |
466 | * @ap: ATA channel to examine | |
467 | * @device: Device to examine (starting at zero) | |
468 | * | |
469 | * This technique was originally described in | |
470 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
471 | * later found its way into the ATA/ATAPI spec. | |
472 | * | |
473 | * Write a pattern to the ATA shadow registers, | |
474 | * and if a device is present, it will respond by | |
475 | * correctly storing and echoing back the | |
476 | * ATA shadow register contents. | |
477 | * | |
478 | * LOCKING: | |
479 | * caller. | |
480 | */ | |
481 | ||
482 | static unsigned int ata_mmio_devchk(struct ata_port *ap, | |
483 | unsigned int device) | |
484 | { | |
485 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
486 | u8 nsect, lbal; | |
487 | ||
488 | ap->ops->dev_select(ap, device); | |
489 | ||
490 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
491 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
492 | ||
493 | writeb(0xaa, (void __iomem *) ioaddr->nsect_addr); | |
494 | writeb(0x55, (void __iomem *) ioaddr->lbal_addr); | |
495 | ||
496 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
497 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
498 | ||
499 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
500 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
501 | ||
502 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
503 | return 1; /* we found a device */ | |
504 | ||
505 | return 0; /* nothing found */ | |
506 | } | |
507 | ||
508 | /** | |
509 | * ata_devchk - PATA device presence detection | |
510 | * @ap: ATA channel to examine | |
511 | * @device: Device to examine (starting at zero) | |
512 | * | |
513 | * Dispatch ATA device presence detection, depending | |
514 | * on whether we are using PIO or MMIO to talk to the | |
515 | * ATA shadow registers. | |
516 | * | |
517 | * LOCKING: | |
518 | * caller. | |
519 | */ | |
520 | ||
521 | static unsigned int ata_devchk(struct ata_port *ap, | |
522 | unsigned int device) | |
523 | { | |
524 | if (ap->flags & ATA_FLAG_MMIO) | |
525 | return ata_mmio_devchk(ap, device); | |
526 | return ata_pio_devchk(ap, device); | |
527 | } | |
528 | ||
529 | /** | |
530 | * ata_dev_classify - determine device type based on ATA-spec signature | |
531 | * @tf: ATA taskfile register set for device to be identified | |
532 | * | |
533 | * Determine from taskfile register contents whether a device is | |
534 | * ATA or ATAPI, as per "Signature and persistence" section | |
535 | * of ATA/PI spec (volume 1, sect 5.14). | |
536 | * | |
537 | * LOCKING: | |
538 | * None. | |
539 | * | |
540 | * RETURNS: | |
541 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN | |
542 | * the event of failure. | |
543 | */ | |
544 | ||
057ace5e | 545 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
546 | { |
547 | /* Apple's open source Darwin code hints that some devices only | |
548 | * put a proper signature into the LBA mid/high registers, | |
549 | * So, we only check those. It's sufficient for uniqueness. | |
550 | */ | |
551 | ||
552 | if (((tf->lbam == 0) && (tf->lbah == 0)) || | |
553 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { | |
554 | DPRINTK("found ATA device by sig\n"); | |
555 | return ATA_DEV_ATA; | |
556 | } | |
557 | ||
558 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || | |
559 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { | |
560 | DPRINTK("found ATAPI device by sig\n"); | |
561 | return ATA_DEV_ATAPI; | |
562 | } | |
563 | ||
564 | DPRINTK("unknown device\n"); | |
565 | return ATA_DEV_UNKNOWN; | |
566 | } | |
567 | ||
568 | /** | |
569 | * ata_dev_try_classify - Parse returned ATA device signature | |
570 | * @ap: ATA channel to examine | |
571 | * @device: Device to examine (starting at zero) | |
b4dc7623 | 572 | * @r_err: Value of error register on completion |
1da177e4 LT |
573 | * |
574 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
575 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
576 | * shadow registers, indicating the results of device detection | |
577 | * and diagnostics. | |
578 | * | |
579 | * Select the ATA device, and read the values from the ATA shadow | |
580 | * registers. Then parse according to the Error register value, | |
581 | * and the spec-defined values examined by ata_dev_classify(). | |
582 | * | |
583 | * LOCKING: | |
584 | * caller. | |
b4dc7623 TH |
585 | * |
586 | * RETURNS: | |
587 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 LT |
588 | */ |
589 | ||
b4dc7623 TH |
590 | static unsigned int |
591 | ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) | |
1da177e4 | 592 | { |
1da177e4 LT |
593 | struct ata_taskfile tf; |
594 | unsigned int class; | |
595 | u8 err; | |
596 | ||
597 | ap->ops->dev_select(ap, device); | |
598 | ||
599 | memset(&tf, 0, sizeof(tf)); | |
600 | ||
1da177e4 | 601 | ap->ops->tf_read(ap, &tf); |
0169e284 | 602 | err = tf.feature; |
b4dc7623 TH |
603 | if (r_err) |
604 | *r_err = err; | |
1da177e4 LT |
605 | |
606 | /* see if device passed diags */ | |
607 | if (err == 1) | |
608 | /* do nothing */ ; | |
609 | else if ((device == 0) && (err == 0x81)) | |
610 | /* do nothing */ ; | |
611 | else | |
b4dc7623 | 612 | return ATA_DEV_NONE; |
1da177e4 | 613 | |
b4dc7623 | 614 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 615 | class = ata_dev_classify(&tf); |
b4dc7623 | 616 | |
1da177e4 | 617 | if (class == ATA_DEV_UNKNOWN) |
b4dc7623 | 618 | return ATA_DEV_NONE; |
1da177e4 | 619 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
b4dc7623 TH |
620 | return ATA_DEV_NONE; |
621 | return class; | |
1da177e4 LT |
622 | } |
623 | ||
624 | /** | |
6a62a04d | 625 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
626 | * @id: IDENTIFY DEVICE results we will examine |
627 | * @s: string into which data is output | |
628 | * @ofs: offset into identify device page | |
629 | * @len: length of string to return. must be an even number. | |
630 | * | |
631 | * The strings in the IDENTIFY DEVICE page are broken up into | |
632 | * 16-bit chunks. Run through the string, and output each | |
633 | * 8-bit chunk linearly, regardless of platform. | |
634 | * | |
635 | * LOCKING: | |
636 | * caller. | |
637 | */ | |
638 | ||
6a62a04d TH |
639 | void ata_id_string(const u16 *id, unsigned char *s, |
640 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
641 | { |
642 | unsigned int c; | |
643 | ||
644 | while (len > 0) { | |
645 | c = id[ofs] >> 8; | |
646 | *s = c; | |
647 | s++; | |
648 | ||
649 | c = id[ofs] & 0xff; | |
650 | *s = c; | |
651 | s++; | |
652 | ||
653 | ofs++; | |
654 | len -= 2; | |
655 | } | |
656 | } | |
657 | ||
0e949ff3 | 658 | /** |
6a62a04d | 659 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
660 | * @id: IDENTIFY DEVICE results we will examine |
661 | * @s: string into which data is output | |
662 | * @ofs: offset into identify device page | |
663 | * @len: length of string to return. must be an odd number. | |
664 | * | |
6a62a04d | 665 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
666 | * trims trailing spaces and terminates the resulting string with |
667 | * null. @len must be actual maximum length (even number) + 1. | |
668 | * | |
669 | * LOCKING: | |
670 | * caller. | |
671 | */ | |
6a62a04d TH |
672 | void ata_id_c_string(const u16 *id, unsigned char *s, |
673 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
674 | { |
675 | unsigned char *p; | |
676 | ||
677 | WARN_ON(!(len & 1)); | |
678 | ||
6a62a04d | 679 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
680 | |
681 | p = s + strnlen(s, len - 1); | |
682 | while (p > s && p[-1] == ' ') | |
683 | p--; | |
684 | *p = '\0'; | |
685 | } | |
0baab86b | 686 | |
2940740b TH |
687 | static u64 ata_id_n_sectors(const u16 *id) |
688 | { | |
689 | if (ata_id_has_lba(id)) { | |
690 | if (ata_id_has_lba48(id)) | |
691 | return ata_id_u64(id, 100); | |
692 | else | |
693 | return ata_id_u32(id, 60); | |
694 | } else { | |
695 | if (ata_id_current_chs_valid(id)) | |
696 | return ata_id_u32(id, 57); | |
697 | else | |
698 | return id[1] * id[3] * id[6]; | |
699 | } | |
700 | } | |
701 | ||
0baab86b EF |
702 | /** |
703 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
704 | * @ap: ATA channel to manipulate | |
705 | * @device: ATA device (numbered from zero) to select | |
706 | * | |
707 | * This function performs no actual function. | |
708 | * | |
709 | * May be used as the dev_select() entry in ata_port_operations. | |
710 | * | |
711 | * LOCKING: | |
712 | * caller. | |
713 | */ | |
1da177e4 LT |
714 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
715 | { | |
716 | } | |
717 | ||
0baab86b | 718 | |
1da177e4 LT |
719 | /** |
720 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
721 | * @ap: ATA channel to manipulate | |
722 | * @device: ATA device (numbered from zero) to select | |
723 | * | |
724 | * Use the method defined in the ATA specification to | |
725 | * make either device 0, or device 1, active on the | |
0baab86b EF |
726 | * ATA channel. Works with both PIO and MMIO. |
727 | * | |
728 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
729 | * |
730 | * LOCKING: | |
731 | * caller. | |
732 | */ | |
733 | ||
734 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
735 | { | |
736 | u8 tmp; | |
737 | ||
738 | if (device == 0) | |
739 | tmp = ATA_DEVICE_OBS; | |
740 | else | |
741 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
742 | ||
743 | if (ap->flags & ATA_FLAG_MMIO) { | |
744 | writeb(tmp, (void __iomem *) ap->ioaddr.device_addr); | |
745 | } else { | |
746 | outb(tmp, ap->ioaddr.device_addr); | |
747 | } | |
748 | ata_pause(ap); /* needed; also flushes, for mmio */ | |
749 | } | |
750 | ||
751 | /** | |
752 | * ata_dev_select - Select device 0/1 on ATA bus | |
753 | * @ap: ATA channel to manipulate | |
754 | * @device: ATA device (numbered from zero) to select | |
755 | * @wait: non-zero to wait for Status register BSY bit to clear | |
756 | * @can_sleep: non-zero if context allows sleeping | |
757 | * | |
758 | * Use the method defined in the ATA specification to | |
759 | * make either device 0, or device 1, active on the | |
760 | * ATA channel. | |
761 | * | |
762 | * This is a high-level version of ata_std_dev_select(), | |
763 | * which additionally provides the services of inserting | |
764 | * the proper pauses and status polling, where needed. | |
765 | * | |
766 | * LOCKING: | |
767 | * caller. | |
768 | */ | |
769 | ||
770 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
771 | unsigned int wait, unsigned int can_sleep) | |
772 | { | |
773 | VPRINTK("ENTER, ata%u: device %u, wait %u\n", | |
774 | ap->id, device, wait); | |
775 | ||
776 | if (wait) | |
777 | ata_wait_idle(ap); | |
778 | ||
779 | ap->ops->dev_select(ap, device); | |
780 | ||
781 | if (wait) { | |
782 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) | |
783 | msleep(150); | |
784 | ata_wait_idle(ap); | |
785 | } | |
786 | } | |
787 | ||
788 | /** | |
789 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 790 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 791 | * |
0bd3300a TH |
792 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
793 | * page. | |
1da177e4 LT |
794 | * |
795 | * LOCKING: | |
796 | * caller. | |
797 | */ | |
798 | ||
0bd3300a | 799 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
800 | { |
801 | DPRINTK("49==0x%04x " | |
802 | "53==0x%04x " | |
803 | "63==0x%04x " | |
804 | "64==0x%04x " | |
805 | "75==0x%04x \n", | |
0bd3300a TH |
806 | id[49], |
807 | id[53], | |
808 | id[63], | |
809 | id[64], | |
810 | id[75]); | |
1da177e4 LT |
811 | DPRINTK("80==0x%04x " |
812 | "81==0x%04x " | |
813 | "82==0x%04x " | |
814 | "83==0x%04x " | |
815 | "84==0x%04x \n", | |
0bd3300a TH |
816 | id[80], |
817 | id[81], | |
818 | id[82], | |
819 | id[83], | |
820 | id[84]); | |
1da177e4 LT |
821 | DPRINTK("88==0x%04x " |
822 | "93==0x%04x\n", | |
0bd3300a TH |
823 | id[88], |
824 | id[93]); | |
1da177e4 LT |
825 | } |
826 | ||
cb95d562 TH |
827 | /** |
828 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
829 | * @id: IDENTIFY data to compute xfer mask from | |
830 | * | |
831 | * Compute the xfermask for this device. This is not as trivial | |
832 | * as it seems if we must consider early devices correctly. | |
833 | * | |
834 | * FIXME: pre IDE drive timing (do we care ?). | |
835 | * | |
836 | * LOCKING: | |
837 | * None. | |
838 | * | |
839 | * RETURNS: | |
840 | * Computed xfermask | |
841 | */ | |
842 | static unsigned int ata_id_xfermask(const u16 *id) | |
843 | { | |
844 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
845 | ||
846 | /* Usual case. Word 53 indicates word 64 is valid */ | |
847 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
848 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
849 | pio_mask <<= 3; | |
850 | pio_mask |= 0x7; | |
851 | } else { | |
852 | /* If word 64 isn't valid then Word 51 high byte holds | |
853 | * the PIO timing number for the maximum. Turn it into | |
854 | * a mask. | |
855 | */ | |
856 | pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ; | |
857 | ||
858 | /* But wait.. there's more. Design your standards by | |
859 | * committee and you too can get a free iordy field to | |
860 | * process. However its the speeds not the modes that | |
861 | * are supported... Note drivers using the timing API | |
862 | * will get this right anyway | |
863 | */ | |
864 | } | |
865 | ||
866 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 TH |
867 | |
868 | udma_mask = 0; | |
869 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
870 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
871 | |
872 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
873 | } | |
874 | ||
86e45b6b TH |
875 | /** |
876 | * ata_port_queue_task - Queue port_task | |
877 | * @ap: The ata_port to queue port_task for | |
878 | * | |
879 | * Schedule @fn(@data) for execution after @delay jiffies using | |
880 | * port_task. There is one port_task per port and it's the | |
881 | * user(low level driver)'s responsibility to make sure that only | |
882 | * one task is active at any given time. | |
883 | * | |
884 | * libata core layer takes care of synchronization between | |
885 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
886 | * synchronization. | |
887 | * | |
888 | * LOCKING: | |
889 | * Inherited from caller. | |
890 | */ | |
891 | void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data, | |
892 | unsigned long delay) | |
893 | { | |
894 | int rc; | |
895 | ||
2e755f68 | 896 | if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK) |
86e45b6b TH |
897 | return; |
898 | ||
899 | PREPARE_WORK(&ap->port_task, fn, data); | |
900 | ||
901 | if (!delay) | |
902 | rc = queue_work(ata_wq, &ap->port_task); | |
903 | else | |
904 | rc = queue_delayed_work(ata_wq, &ap->port_task, delay); | |
905 | ||
906 | /* rc == 0 means that another user is using port task */ | |
907 | WARN_ON(rc == 0); | |
908 | } | |
909 | ||
910 | /** | |
911 | * ata_port_flush_task - Flush port_task | |
912 | * @ap: The ata_port to flush port_task for | |
913 | * | |
914 | * After this function completes, port_task is guranteed not to | |
915 | * be running or scheduled. | |
916 | * | |
917 | * LOCKING: | |
918 | * Kernel thread context (may sleep) | |
919 | */ | |
920 | void ata_port_flush_task(struct ata_port *ap) | |
921 | { | |
922 | unsigned long flags; | |
923 | ||
924 | DPRINTK("ENTER\n"); | |
925 | ||
926 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
2e755f68 | 927 | ap->flags |= ATA_FLAG_FLUSH_PORT_TASK; |
86e45b6b TH |
928 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
929 | ||
930 | DPRINTK("flush #1\n"); | |
931 | flush_workqueue(ata_wq); | |
932 | ||
933 | /* | |
934 | * At this point, if a task is running, it's guaranteed to see | |
935 | * the FLUSH flag; thus, it will never queue pio tasks again. | |
936 | * Cancel and flush. | |
937 | */ | |
938 | if (!cancel_delayed_work(&ap->port_task)) { | |
939 | DPRINTK("flush #2\n"); | |
940 | flush_workqueue(ata_wq); | |
941 | } | |
942 | ||
943 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
2e755f68 | 944 | ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK; |
86e45b6b TH |
945 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
946 | ||
947 | DPRINTK("EXIT\n"); | |
948 | } | |
949 | ||
77853bf2 | 950 | void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 951 | { |
77853bf2 | 952 | struct completion *waiting = qc->private_data; |
a2a7a662 | 953 | |
77853bf2 | 954 | qc->ap->ops->tf_read(qc->ap, &qc->tf); |
a2a7a662 | 955 | complete(waiting); |
a2a7a662 TH |
956 | } |
957 | ||
958 | /** | |
959 | * ata_exec_internal - execute libata internal command | |
960 | * @ap: Port to which the command is sent | |
961 | * @dev: Device to which the command is sent | |
962 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 963 | * @cdb: CDB for packet command |
a2a7a662 TH |
964 | * @dma_dir: Data tranfer direction of the command |
965 | * @buf: Data buffer of the command | |
966 | * @buflen: Length of data buffer | |
967 | * | |
968 | * Executes libata internal command with timeout. @tf contains | |
969 | * command on entry and result on return. Timeout and error | |
970 | * conditions are reported via return value. No recovery action | |
971 | * is taken after a command times out. It's caller's duty to | |
972 | * clean up after timeout. | |
973 | * | |
974 | * LOCKING: | |
975 | * None. Should be called with kernel context, might sleep. | |
976 | */ | |
977 | ||
1ad8e7f9 TH |
978 | unsigned ata_exec_internal(struct ata_port *ap, struct ata_device *dev, |
979 | struct ata_taskfile *tf, const u8 *cdb, | |
980 | int dma_dir, void *buf, unsigned int buflen) | |
a2a7a662 TH |
981 | { |
982 | u8 command = tf->command; | |
983 | struct ata_queued_cmd *qc; | |
984 | DECLARE_COMPLETION(wait); | |
985 | unsigned long flags; | |
77853bf2 | 986 | unsigned int err_mask; |
a2a7a662 TH |
987 | |
988 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
989 | ||
990 | qc = ata_qc_new_init(ap, dev); | |
991 | BUG_ON(qc == NULL); | |
992 | ||
993 | qc->tf = *tf; | |
d69cf37d TH |
994 | if (cdb) |
995 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
a2a7a662 TH |
996 | qc->dma_dir = dma_dir; |
997 | if (dma_dir != DMA_NONE) { | |
998 | ata_sg_init_one(qc, buf, buflen); | |
999 | qc->nsect = buflen / ATA_SECT_SIZE; | |
1000 | } | |
1001 | ||
77853bf2 | 1002 | qc->private_data = &wait; |
a2a7a662 TH |
1003 | qc->complete_fn = ata_qc_complete_internal; |
1004 | ||
8e0e694a | 1005 | ata_qc_issue(qc); |
a2a7a662 TH |
1006 | |
1007 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1008 | ||
1009 | if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) { | |
41ade50c AL |
1010 | ata_port_flush_task(ap); |
1011 | ||
a2a7a662 TH |
1012 | spin_lock_irqsave(&ap->host_set->lock, flags); |
1013 | ||
1014 | /* We're racing with irq here. If we lose, the | |
1015 | * following test prevents us from completing the qc | |
1016 | * again. If completion irq occurs after here but | |
1017 | * before the caller cleans up, it will result in a | |
1018 | * spurious interrupt. We can live with that. | |
1019 | */ | |
77853bf2 | 1020 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
11a56d24 | 1021 | qc->err_mask = AC_ERR_TIMEOUT; |
a2a7a662 TH |
1022 | ata_qc_complete(qc); |
1023 | printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n", | |
1024 | ap->id, command); | |
1025 | } | |
1026 | ||
1027 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1028 | } | |
1029 | ||
77853bf2 TH |
1030 | *tf = qc->tf; |
1031 | err_mask = qc->err_mask; | |
1032 | ||
1033 | ata_qc_free(qc); | |
1034 | ||
1f7dd3e9 TH |
1035 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1036 | * Until those drivers are fixed, we detect the condition | |
1037 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1038 | * port. | |
1039 | * | |
1040 | * Note that this doesn't change any behavior as internal | |
1041 | * command failure results in disabling the device in the | |
1042 | * higher layer for LLDDs without new reset/EH callbacks. | |
1043 | * | |
1044 | * Kill the following code as soon as those drivers are fixed. | |
1045 | */ | |
198e0fed | 1046 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1047 | err_mask |= AC_ERR_SYSTEM; |
1048 | ata_port_probe(ap); | |
1049 | } | |
1050 | ||
77853bf2 | 1051 | return err_mask; |
a2a7a662 TH |
1052 | } |
1053 | ||
1bc4ccff AC |
1054 | /** |
1055 | * ata_pio_need_iordy - check if iordy needed | |
1056 | * @adev: ATA device | |
1057 | * | |
1058 | * Check if the current speed of the device requires IORDY. Used | |
1059 | * by various controllers for chip configuration. | |
1060 | */ | |
1061 | ||
1062 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) | |
1063 | { | |
1064 | int pio; | |
1065 | int speed = adev->pio_mode - XFER_PIO_0; | |
1066 | ||
1067 | if (speed < 2) | |
1068 | return 0; | |
1069 | if (speed > 2) | |
1070 | return 1; | |
2e9edbf8 | 1071 | |
1bc4ccff AC |
1072 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1073 | ||
1074 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ | |
1075 | pio = adev->id[ATA_ID_EIDE_PIO]; | |
1076 | /* Is the speed faster than the drive allows non IORDY ? */ | |
1077 | if (pio) { | |
1078 | /* This is cycle times not frequency - watch the logic! */ | |
1079 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
1080 | return 1; | |
1081 | return 0; | |
1082 | } | |
1083 | } | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1da177e4 | 1087 | /** |
49016aca TH |
1088 | * ata_dev_read_id - Read ID data from the specified device |
1089 | * @ap: port on which target device resides | |
1090 | * @dev: target device | |
1091 | * @p_class: pointer to class of the target device (may be changed) | |
1092 | * @post_reset: is this read ID post-reset? | |
d9572b1d | 1093 | * @p_id: read IDENTIFY page (newly allocated) |
1da177e4 | 1094 | * |
49016aca TH |
1095 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1096 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1097 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1098 | * for pre-ATA4 drives. | |
1da177e4 LT |
1099 | * |
1100 | * LOCKING: | |
49016aca TH |
1101 | * Kernel thread context (may sleep) |
1102 | * | |
1103 | * RETURNS: | |
1104 | * 0 on success, -errno otherwise. | |
1da177e4 | 1105 | */ |
49016aca | 1106 | static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev, |
d9572b1d | 1107 | unsigned int *p_class, int post_reset, u16 **p_id) |
1da177e4 | 1108 | { |
49016aca | 1109 | unsigned int class = *p_class; |
a0123703 | 1110 | struct ata_taskfile tf; |
49016aca | 1111 | unsigned int err_mask = 0; |
d9572b1d | 1112 | u16 *id; |
49016aca TH |
1113 | const char *reason; |
1114 | int rc; | |
1da177e4 | 1115 | |
49016aca | 1116 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 | 1117 | |
49016aca | 1118 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
1da177e4 | 1119 | |
d9572b1d TH |
1120 | id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL); |
1121 | if (id == NULL) { | |
1122 | rc = -ENOMEM; | |
1123 | reason = "out of memory"; | |
1124 | goto err_out; | |
1125 | } | |
1126 | ||
49016aca TH |
1127 | retry: |
1128 | ata_tf_init(ap, &tf, dev->devno); | |
a0123703 | 1129 | |
49016aca TH |
1130 | switch (class) { |
1131 | case ATA_DEV_ATA: | |
a0123703 | 1132 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1133 | break; |
1134 | case ATA_DEV_ATAPI: | |
a0123703 | 1135 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1136 | break; |
1137 | default: | |
1138 | rc = -ENODEV; | |
1139 | reason = "unsupported class"; | |
1140 | goto err_out; | |
1da177e4 LT |
1141 | } |
1142 | ||
a0123703 | 1143 | tf.protocol = ATA_PROT_PIO; |
1da177e4 | 1144 | |
d69cf37d | 1145 | err_mask = ata_exec_internal(ap, dev, &tf, NULL, DMA_FROM_DEVICE, |
49016aca | 1146 | id, sizeof(id[0]) * ATA_ID_WORDS); |
a0123703 | 1147 | if (err_mask) { |
49016aca TH |
1148 | rc = -EIO; |
1149 | reason = "I/O error"; | |
1da177e4 LT |
1150 | goto err_out; |
1151 | } | |
1152 | ||
49016aca | 1153 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1154 | |
49016aca | 1155 | /* sanity check */ |
692785e7 | 1156 | if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) { |
49016aca TH |
1157 | rc = -EINVAL; |
1158 | reason = "device reports illegal type"; | |
1159 | goto err_out; | |
1160 | } | |
1161 | ||
1162 | if (post_reset && class == ATA_DEV_ATA) { | |
1163 | /* | |
1164 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1165 | * SRST RESET | |
1166 | * IDENTIFY | |
1167 | * INITIALIZE DEVICE PARAMETERS | |
1168 | * anything else.. | |
1169 | * Some drives were very specific about that exact sequence. | |
1170 | */ | |
1171 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
00b6f5e9 | 1172 | err_mask = ata_dev_init_params(ap, dev, id[3], id[6]); |
49016aca TH |
1173 | if (err_mask) { |
1174 | rc = -EIO; | |
1175 | reason = "INIT_DEV_PARAMS failed"; | |
1176 | goto err_out; | |
1177 | } | |
1178 | ||
1179 | /* current CHS translation info (id[53-58]) might be | |
1180 | * changed. reread the identify device info. | |
1181 | */ | |
1182 | post_reset = 0; | |
1183 | goto retry; | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | *p_class = class; | |
d9572b1d | 1188 | *p_id = id; |
49016aca TH |
1189 | return 0; |
1190 | ||
1191 | err_out: | |
1192 | printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n", | |
1193 | ap->id, dev->devno, reason); | |
d9572b1d | 1194 | kfree(id); |
49016aca TH |
1195 | return rc; |
1196 | } | |
1197 | ||
4b2f3ede TH |
1198 | static inline u8 ata_dev_knobble(const struct ata_port *ap, |
1199 | struct ata_device *dev) | |
1200 | { | |
1201 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
1202 | } | |
1203 | ||
49016aca | 1204 | /** |
ffeae418 TH |
1205 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
1206 | * @ap: Port on which target device resides | |
1207 | * @dev: Target device to configure | |
4c2d721a | 1208 | * @print_info: Enable device info printout |
ffeae418 TH |
1209 | * |
1210 | * Configure @dev according to @dev->id. Generic and low-level | |
1211 | * driver specific fixups are also applied. | |
49016aca TH |
1212 | * |
1213 | * LOCKING: | |
ffeae418 TH |
1214 | * Kernel thread context (may sleep) |
1215 | * | |
1216 | * RETURNS: | |
1217 | * 0 on success, -errno otherwise | |
49016aca | 1218 | */ |
4c2d721a TH |
1219 | static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, |
1220 | int print_info) | |
49016aca | 1221 | { |
1148c3a7 | 1222 | const u16 *id = dev->id; |
ff8854b2 | 1223 | unsigned int xfer_mask; |
49016aca TH |
1224 | int i, rc; |
1225 | ||
e1211e3f | 1226 | if (!ata_dev_enabled(dev)) { |
49016aca | 1227 | DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n", |
ffeae418 TH |
1228 | ap->id, dev->devno); |
1229 | return 0; | |
49016aca TH |
1230 | } |
1231 | ||
ffeae418 | 1232 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 | 1233 | |
c39f5ebe TH |
1234 | /* print device capabilities */ |
1235 | if (print_info) | |
1236 | printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x " | |
1237 | "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", | |
1238 | ap->id, dev->devno, id[49], id[82], id[83], | |
1239 | id[84], id[85], id[86], id[87], id[88]); | |
1240 | ||
208a9933 | 1241 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 1242 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
1243 | dev->max_sectors = 0; |
1244 | dev->cdb_len = 0; | |
1245 | dev->n_sectors = 0; | |
1246 | dev->cylinders = 0; | |
1247 | dev->heads = 0; | |
1248 | dev->sectors = 0; | |
1249 | ||
1da177e4 LT |
1250 | /* |
1251 | * common ATA, ATAPI feature tests | |
1252 | */ | |
1253 | ||
ff8854b2 | 1254 | /* find max transfer mode; for printk only */ |
1148c3a7 | 1255 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 1256 | |
1148c3a7 | 1257 | ata_dump_id(id); |
1da177e4 LT |
1258 | |
1259 | /* ATA-specific feature tests */ | |
1260 | if (dev->class == ATA_DEV_ATA) { | |
1148c3a7 | 1261 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 1262 | |
1148c3a7 | 1263 | if (ata_id_has_lba(id)) { |
4c2d721a | 1264 | const char *lba_desc; |
8bf62ece | 1265 | |
4c2d721a TH |
1266 | lba_desc = "LBA"; |
1267 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 1268 | if (ata_id_has_lba48(id)) { |
8bf62ece | 1269 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a TH |
1270 | lba_desc = "LBA48"; |
1271 | } | |
8bf62ece AL |
1272 | |
1273 | /* print device info to dmesg */ | |
4c2d721a TH |
1274 | if (print_info) |
1275 | printk(KERN_INFO "ata%u: dev %u ATA-%d, " | |
1276 | "max %s, %Lu sectors: %s\n", | |
1277 | ap->id, dev->devno, | |
1148c3a7 | 1278 | ata_id_major_version(id), |
ff8854b2 | 1279 | ata_mode_string(xfer_mask), |
4c2d721a TH |
1280 | (unsigned long long)dev->n_sectors, |
1281 | lba_desc); | |
ffeae418 | 1282 | } else { |
8bf62ece AL |
1283 | /* CHS */ |
1284 | ||
1285 | /* Default translation */ | |
1148c3a7 TH |
1286 | dev->cylinders = id[1]; |
1287 | dev->heads = id[3]; | |
1288 | dev->sectors = id[6]; | |
8bf62ece | 1289 | |
1148c3a7 | 1290 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 1291 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
1292 | dev->cylinders = id[54]; |
1293 | dev->heads = id[55]; | |
1294 | dev->sectors = id[56]; | |
8bf62ece AL |
1295 | } |
1296 | ||
1297 | /* print device info to dmesg */ | |
4c2d721a TH |
1298 | if (print_info) |
1299 | printk(KERN_INFO "ata%u: dev %u ATA-%d, " | |
1300 | "max %s, %Lu sectors: CHS %u/%u/%u\n", | |
1301 | ap->id, dev->devno, | |
1148c3a7 | 1302 | ata_id_major_version(id), |
ff8854b2 | 1303 | ata_mode_string(xfer_mask), |
4c2d721a TH |
1304 | (unsigned long long)dev->n_sectors, |
1305 | dev->cylinders, dev->heads, dev->sectors); | |
1da177e4 LT |
1306 | } |
1307 | ||
6e7846e9 | 1308 | dev->cdb_len = 16; |
1da177e4 LT |
1309 | } |
1310 | ||
1311 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 1312 | else if (dev->class == ATA_DEV_ATAPI) { |
1148c3a7 | 1313 | rc = atapi_cdb_len(id); |
1da177e4 LT |
1314 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
1315 | printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id); | |
ffeae418 | 1316 | rc = -EINVAL; |
1da177e4 LT |
1317 | goto err_out_nosup; |
1318 | } | |
6e7846e9 | 1319 | dev->cdb_len = (unsigned int) rc; |
1da177e4 LT |
1320 | |
1321 | /* print device info to dmesg */ | |
4c2d721a TH |
1322 | if (print_info) |
1323 | printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n", | |
ff8854b2 | 1324 | ap->id, dev->devno, ata_mode_string(xfer_mask)); |
1da177e4 LT |
1325 | } |
1326 | ||
6e7846e9 TH |
1327 | ap->host->max_cmd_len = 0; |
1328 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1329 | ap->host->max_cmd_len = max_t(unsigned int, | |
1330 | ap->host->max_cmd_len, | |
1331 | ap->device[i].cdb_len); | |
1332 | ||
4b2f3ede TH |
1333 | /* limit bridge transfers to udma5, 200 sectors */ |
1334 | if (ata_dev_knobble(ap, dev)) { | |
4c2d721a TH |
1335 | if (print_info) |
1336 | printk(KERN_INFO "ata%u(%u): applying bridge limits\n", | |
1337 | ap->id, dev->devno); | |
5a529139 | 1338 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
1339 | dev->max_sectors = ATA_MAX_SECTORS; |
1340 | } | |
1341 | ||
1342 | if (ap->ops->dev_config) | |
1343 | ap->ops->dev_config(ap, dev); | |
1344 | ||
1da177e4 | 1345 | DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap)); |
ffeae418 | 1346 | return 0; |
1da177e4 LT |
1347 | |
1348 | err_out_nosup: | |
1da177e4 | 1349 | DPRINTK("EXIT, err\n"); |
ffeae418 | 1350 | return rc; |
1da177e4 LT |
1351 | } |
1352 | ||
1353 | /** | |
1354 | * ata_bus_probe - Reset and probe ATA bus | |
1355 | * @ap: Bus to probe | |
1356 | * | |
0cba632b JG |
1357 | * Master ATA bus probing function. Initiates a hardware-dependent |
1358 | * bus reset, then attempts to identify any devices found on | |
1359 | * the bus. | |
1360 | * | |
1da177e4 | 1361 | * LOCKING: |
0cba632b | 1362 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1363 | * |
1364 | * RETURNS: | |
96072e69 | 1365 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
1366 | */ |
1367 | ||
1368 | static int ata_bus_probe(struct ata_port *ap) | |
1369 | { | |
28ca5c57 | 1370 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 TH |
1371 | int tries[ATA_MAX_DEVICES]; |
1372 | int i, rc, down_xfermask; | |
e82cbdb9 | 1373 | struct ata_device *dev; |
1da177e4 | 1374 | |
28ca5c57 | 1375 | ata_port_probe(ap); |
c19ba8af | 1376 | |
14d2bac1 TH |
1377 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1378 | tries[i] = ATA_PROBE_MAX_TRIES; | |
1379 | ||
1380 | retry: | |
1381 | down_xfermask = 0; | |
1382 | ||
2044470c TH |
1383 | /* reset and determine device classes */ |
1384 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1385 | classes[i] = ATA_DEV_UNKNOWN; | |
2061a47a | 1386 | |
2044470c | 1387 | if (ap->ops->probe_reset) { |
c19ba8af | 1388 | rc = ap->ops->probe_reset(ap, classes); |
28ca5c57 TH |
1389 | if (rc) { |
1390 | printk("ata%u: reset failed (errno=%d)\n", ap->id, rc); | |
1391 | return rc; | |
c19ba8af | 1392 | } |
28ca5c57 | 1393 | } else { |
c19ba8af TH |
1394 | ap->ops->phy_reset(ap); |
1395 | ||
198e0fed | 1396 | if (!(ap->flags & ATA_FLAG_DISABLED)) |
2044470c | 1397 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
28ca5c57 | 1398 | classes[i] = ap->device[i].class; |
2044470c | 1399 | |
28ca5c57 TH |
1400 | ata_port_probe(ap); |
1401 | } | |
1da177e4 | 1402 | |
2044470c TH |
1403 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1404 | if (classes[i] == ATA_DEV_UNKNOWN) | |
1405 | classes[i] = ATA_DEV_NONE; | |
1406 | ||
28ca5c57 | 1407 | /* read IDENTIFY page and configure devices */ |
1da177e4 | 1408 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
e82cbdb9 | 1409 | dev = &ap->device[i]; |
28ca5c57 TH |
1410 | dev->class = classes[i]; |
1411 | ||
14d2bac1 TH |
1412 | if (!tries[i]) { |
1413 | ata_down_xfermask_limit(ap, dev, 1); | |
1414 | ata_dev_disable(ap, dev); | |
ffeae418 TH |
1415 | } |
1416 | ||
14d2bac1 | 1417 | if (!ata_dev_enabled(dev)) |
ffeae418 | 1418 | continue; |
ffeae418 | 1419 | |
14d2bac1 TH |
1420 | kfree(dev->id); |
1421 | dev->id = NULL; | |
1422 | rc = ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id); | |
1423 | if (rc) | |
1424 | goto fail; | |
1425 | ||
1426 | rc = ata_dev_configure(ap, dev, 1); | |
1427 | if (rc) | |
1428 | goto fail; | |
1da177e4 LT |
1429 | } |
1430 | ||
e82cbdb9 TH |
1431 | /* configure transfer mode */ |
1432 | if (ap->ops->set_mode) { | |
1433 | /* FIXME: make ->set_mode handle no device case and | |
1434 | * return error code and failing device on failure as | |
1435 | * ata_set_mode() does. | |
1436 | */ | |
14d2bac1 TH |
1437 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1438 | if (ata_dev_enabled(&ap->device[i])) { | |
1439 | ap->ops->set_mode(ap); | |
1440 | break; | |
1441 | } | |
e82cbdb9 TH |
1442 | rc = 0; |
1443 | } else { | |
14d2bac1 TH |
1444 | rc = ata_set_mode(ap, &dev); |
1445 | if (rc) { | |
1446 | down_xfermask = 1; | |
1447 | goto fail; | |
1448 | } | |
e82cbdb9 | 1449 | } |
1da177e4 | 1450 | |
e82cbdb9 TH |
1451 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1452 | if (ata_dev_enabled(&ap->device[i])) | |
1453 | return 0; | |
1da177e4 | 1454 | |
e82cbdb9 TH |
1455 | /* no device present, disable port */ |
1456 | ata_port_disable(ap); | |
1da177e4 | 1457 | ap->ops->port_disable(ap); |
96072e69 | 1458 | return -ENODEV; |
14d2bac1 TH |
1459 | |
1460 | fail: | |
1461 | switch (rc) { | |
1462 | case -EINVAL: | |
1463 | case -ENODEV: | |
1464 | tries[dev->devno] = 0; | |
1465 | break; | |
1466 | case -EIO: | |
1467 | ata_down_sata_spd_limit(ap); | |
1468 | /* fall through */ | |
1469 | default: | |
1470 | tries[dev->devno]--; | |
1471 | if (down_xfermask && | |
1472 | ata_down_xfermask_limit(ap, dev, tries[dev->devno] == 1)) | |
1473 | tries[dev->devno] = 0; | |
1474 | } | |
1475 | ||
1476 | goto retry; | |
1da177e4 LT |
1477 | } |
1478 | ||
1479 | /** | |
0cba632b JG |
1480 | * ata_port_probe - Mark port as enabled |
1481 | * @ap: Port for which we indicate enablement | |
1da177e4 | 1482 | * |
0cba632b JG |
1483 | * Modify @ap data structure such that the system |
1484 | * thinks that the entire port is enabled. | |
1485 | * | |
1486 | * LOCKING: host_set lock, or some other form of | |
1487 | * serialization. | |
1da177e4 LT |
1488 | */ |
1489 | ||
1490 | void ata_port_probe(struct ata_port *ap) | |
1491 | { | |
198e0fed | 1492 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
1493 | } |
1494 | ||
3be680b7 TH |
1495 | /** |
1496 | * sata_print_link_status - Print SATA link status | |
1497 | * @ap: SATA port to printk link status about | |
1498 | * | |
1499 | * This function prints link speed and status of a SATA link. | |
1500 | * | |
1501 | * LOCKING: | |
1502 | * None. | |
1503 | */ | |
1504 | static void sata_print_link_status(struct ata_port *ap) | |
1505 | { | |
1506 | u32 sstatus, tmp; | |
3be680b7 TH |
1507 | |
1508 | if (!ap->ops->scr_read) | |
1509 | return; | |
1510 | ||
1511 | sstatus = scr_read(ap, SCR_STATUS); | |
1512 | ||
1513 | if (sata_dev_present(ap)) { | |
1514 | tmp = (sstatus >> 4) & 0xf; | |
4c360c81 TH |
1515 | printk(KERN_INFO "ata%u: SATA link up %s (SStatus %X)\n", |
1516 | ap->id, sata_spd_string(tmp), sstatus); | |
3be680b7 TH |
1517 | } else { |
1518 | printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n", | |
1519 | ap->id, sstatus); | |
1520 | } | |
1521 | } | |
1522 | ||
1da177e4 | 1523 | /** |
780a87f7 JG |
1524 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
1525 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1526 | * |
780a87f7 JG |
1527 | * This function issues commands to standard SATA Sxxx |
1528 | * PHY registers, to wake up the phy (and device), and | |
1529 | * clear any reset condition. | |
1da177e4 LT |
1530 | * |
1531 | * LOCKING: | |
0cba632b | 1532 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1533 | * |
1534 | */ | |
1535 | void __sata_phy_reset(struct ata_port *ap) | |
1536 | { | |
1537 | u32 sstatus; | |
1538 | unsigned long timeout = jiffies + (HZ * 5); | |
1539 | ||
1540 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
cdcca89e BR |
1541 | /* issue phy wake/reset */ |
1542 | scr_write_flush(ap, SCR_CONTROL, 0x301); | |
62ba2841 TH |
1543 | /* Couldn't find anything in SATA I/II specs, but |
1544 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
1545 | mdelay(1); | |
1da177e4 | 1546 | } |
cdcca89e | 1547 | scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */ |
1da177e4 LT |
1548 | |
1549 | /* wait for phy to become ready, if necessary */ | |
1550 | do { | |
1551 | msleep(200); | |
1552 | sstatus = scr_read(ap, SCR_STATUS); | |
1553 | if ((sstatus & 0xf) != 1) | |
1554 | break; | |
1555 | } while (time_before(jiffies, timeout)); | |
1556 | ||
3be680b7 TH |
1557 | /* print link status */ |
1558 | sata_print_link_status(ap); | |
656563e3 | 1559 | |
3be680b7 TH |
1560 | /* TODO: phy layer with polling, timeouts, etc. */ |
1561 | if (sata_dev_present(ap)) | |
1da177e4 | 1562 | ata_port_probe(ap); |
3be680b7 | 1563 | else |
1da177e4 | 1564 | ata_port_disable(ap); |
1da177e4 | 1565 | |
198e0fed | 1566 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
1567 | return; |
1568 | ||
1569 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
1570 | ata_port_disable(ap); | |
1571 | return; | |
1572 | } | |
1573 | ||
1574 | ap->cbl = ATA_CBL_SATA; | |
1575 | } | |
1576 | ||
1577 | /** | |
780a87f7 JG |
1578 | * sata_phy_reset - Reset SATA bus. |
1579 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1580 | * |
780a87f7 JG |
1581 | * This function resets the SATA bus, and then probes |
1582 | * the bus for devices. | |
1da177e4 LT |
1583 | * |
1584 | * LOCKING: | |
0cba632b | 1585 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1586 | * |
1587 | */ | |
1588 | void sata_phy_reset(struct ata_port *ap) | |
1589 | { | |
1590 | __sata_phy_reset(ap); | |
198e0fed | 1591 | if (ap->flags & ATA_FLAG_DISABLED) |
1da177e4 LT |
1592 | return; |
1593 | ata_bus_reset(ap); | |
1594 | } | |
1595 | ||
ebdfca6e AC |
1596 | /** |
1597 | * ata_dev_pair - return other device on cable | |
1598 | * @ap: port | |
1599 | * @adev: device | |
1600 | * | |
1601 | * Obtain the other device on the same cable, or if none is | |
1602 | * present NULL is returned | |
1603 | */ | |
2e9edbf8 | 1604 | |
ebdfca6e AC |
1605 | struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev) |
1606 | { | |
1607 | struct ata_device *pair = &ap->device[1 - adev->devno]; | |
e1211e3f | 1608 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
1609 | return NULL; |
1610 | return pair; | |
1611 | } | |
1612 | ||
1da177e4 | 1613 | /** |
780a87f7 JG |
1614 | * ata_port_disable - Disable port. |
1615 | * @ap: Port to be disabled. | |
1da177e4 | 1616 | * |
780a87f7 JG |
1617 | * Modify @ap data structure such that the system |
1618 | * thinks that the entire port is disabled, and should | |
1619 | * never attempt to probe or communicate with devices | |
1620 | * on this port. | |
1621 | * | |
1622 | * LOCKING: host_set lock, or some other form of | |
1623 | * serialization. | |
1da177e4 LT |
1624 | */ |
1625 | ||
1626 | void ata_port_disable(struct ata_port *ap) | |
1627 | { | |
1628 | ap->device[0].class = ATA_DEV_NONE; | |
1629 | ap->device[1].class = ATA_DEV_NONE; | |
198e0fed | 1630 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
1631 | } |
1632 | ||
1c3fae4d TH |
1633 | /** |
1634 | * ata_down_sata_spd_limit - adjust SATA spd limit downward | |
1635 | * @ap: Port to adjust SATA spd limit for | |
1636 | * | |
1637 | * Adjust SATA spd limit of @ap downward. Note that this | |
1638 | * function only adjusts the limit. The change must be applied | |
1639 | * using ata_set_sata_spd(). | |
1640 | * | |
1641 | * LOCKING: | |
1642 | * Inherited from caller. | |
1643 | * | |
1644 | * RETURNS: | |
1645 | * 0 on success, negative errno on failure | |
1646 | */ | |
1ad8e7f9 | 1647 | int ata_down_sata_spd_limit(struct ata_port *ap) |
1c3fae4d TH |
1648 | { |
1649 | u32 spd, mask; | |
1650 | int highbit; | |
1651 | ||
1652 | if (ap->cbl != ATA_CBL_SATA || !ap->ops->scr_read) | |
1653 | return -EOPNOTSUPP; | |
1654 | ||
1655 | mask = ap->sata_spd_limit; | |
1656 | if (mask <= 1) | |
1657 | return -EINVAL; | |
1658 | highbit = fls(mask) - 1; | |
1659 | mask &= ~(1 << highbit); | |
1660 | ||
1661 | spd = (scr_read(ap, SCR_STATUS) >> 4) & 0xf; | |
1662 | if (spd <= 1) | |
1663 | return -EINVAL; | |
1664 | spd--; | |
1665 | mask &= (1 << spd) - 1; | |
1666 | if (!mask) | |
1667 | return -EINVAL; | |
1668 | ||
1669 | ap->sata_spd_limit = mask; | |
1670 | ||
1671 | printk(KERN_WARNING "ata%u: limiting SATA link speed to %s\n", | |
1672 | ap->id, sata_spd_string(fls(mask))); | |
1673 | ||
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | static int __ata_set_sata_spd_needed(struct ata_port *ap, u32 *scontrol) | |
1678 | { | |
1679 | u32 spd, limit; | |
1680 | ||
1681 | if (ap->sata_spd_limit == UINT_MAX) | |
1682 | limit = 0; | |
1683 | else | |
1684 | limit = fls(ap->sata_spd_limit); | |
1685 | ||
1686 | spd = (*scontrol >> 4) & 0xf; | |
1687 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); | |
1688 | ||
1689 | return spd != limit; | |
1690 | } | |
1691 | ||
1692 | /** | |
1693 | * ata_set_sata_spd_needed - is SATA spd configuration needed | |
1694 | * @ap: Port in question | |
1695 | * | |
1696 | * Test whether the spd limit in SControl matches | |
1697 | * @ap->sata_spd_limit. This function is used to determine | |
1698 | * whether hardreset is necessary to apply SATA spd | |
1699 | * configuration. | |
1700 | * | |
1701 | * LOCKING: | |
1702 | * Inherited from caller. | |
1703 | * | |
1704 | * RETURNS: | |
1705 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
1706 | */ | |
1ad8e7f9 | 1707 | int ata_set_sata_spd_needed(struct ata_port *ap) |
1c3fae4d TH |
1708 | { |
1709 | u32 scontrol; | |
1710 | ||
1711 | if (ap->cbl != ATA_CBL_SATA || !ap->ops->scr_read) | |
1712 | return 0; | |
1713 | ||
1714 | scontrol = scr_read(ap, SCR_CONTROL); | |
1715 | ||
1716 | return __ata_set_sata_spd_needed(ap, &scontrol); | |
1717 | } | |
1718 | ||
1719 | /** | |
1720 | * ata_set_sata_spd - set SATA spd according to spd limit | |
1721 | * @ap: Port to set SATA spd for | |
1722 | * | |
1723 | * Set SATA spd of @ap according to sata_spd_limit. | |
1724 | * | |
1725 | * LOCKING: | |
1726 | * Inherited from caller. | |
1727 | * | |
1728 | * RETURNS: | |
1729 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
1730 | * changed. -EOPNOTSUPP if SCR registers are inaccessible. | |
1731 | */ | |
1732 | static int ata_set_sata_spd(struct ata_port *ap) | |
1733 | { | |
1734 | u32 scontrol; | |
1735 | ||
1736 | if (ap->cbl != ATA_CBL_SATA || !ap->ops->scr_read) | |
1737 | return -EOPNOTSUPP; | |
1738 | ||
1739 | scontrol = scr_read(ap, SCR_CONTROL); | |
1740 | if (!__ata_set_sata_spd_needed(ap, &scontrol)) | |
1741 | return 0; | |
1742 | ||
1743 | scr_write(ap, SCR_CONTROL, scontrol); | |
1744 | return 1; | |
1745 | } | |
1746 | ||
452503f9 AC |
1747 | /* |
1748 | * This mode timing computation functionality is ported over from | |
1749 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
1750 | */ | |
1751 | /* | |
1752 | * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). | |
1753 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except | |
1754 | * for PIO 5, which is a nonstandard extension and UDMA6, which | |
2e9edbf8 | 1755 | * is currently supported only by Maxtor drives. |
452503f9 AC |
1756 | */ |
1757 | ||
1758 | static const struct ata_timing ata_timing[] = { | |
1759 | ||
1760 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
1761 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
1762 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
1763 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
1764 | ||
1765 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
1766 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
1767 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
1768 | ||
1769 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2e9edbf8 | 1770 | |
452503f9 AC |
1771 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
1772 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
1773 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2e9edbf8 | 1774 | |
452503f9 AC |
1775 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
1776 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
1777 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
1778 | ||
1779 | /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */ | |
1780 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
1781 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
1782 | ||
1783 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
1784 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
1785 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
1786 | ||
1787 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
1788 | ||
1789 | { 0xFF } | |
1790 | }; | |
1791 | ||
1792 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
1793 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
1794 | ||
1795 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
1796 | { | |
1797 | q->setup = EZ(t->setup * 1000, T); | |
1798 | q->act8b = EZ(t->act8b * 1000, T); | |
1799 | q->rec8b = EZ(t->rec8b * 1000, T); | |
1800 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
1801 | q->active = EZ(t->active * 1000, T); | |
1802 | q->recover = EZ(t->recover * 1000, T); | |
1803 | q->cycle = EZ(t->cycle * 1000, T); | |
1804 | q->udma = EZ(t->udma * 1000, UT); | |
1805 | } | |
1806 | ||
1807 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
1808 | struct ata_timing *m, unsigned int what) | |
1809 | { | |
1810 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
1811 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
1812 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
1813 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
1814 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
1815 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
1816 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
1817 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
1818 | } | |
1819 | ||
1820 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
1821 | { | |
1822 | const struct ata_timing *t; | |
1823 | ||
1824 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 1825 | if (t->mode == 0xFF) |
452503f9 | 1826 | return NULL; |
2e9edbf8 | 1827 | return t; |
452503f9 AC |
1828 | } |
1829 | ||
1830 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
1831 | struct ata_timing *t, int T, int UT) | |
1832 | { | |
1833 | const struct ata_timing *s; | |
1834 | struct ata_timing p; | |
1835 | ||
1836 | /* | |
2e9edbf8 | 1837 | * Find the mode. |
75b1f2f8 | 1838 | */ |
452503f9 AC |
1839 | |
1840 | if (!(s = ata_timing_find_mode(speed))) | |
1841 | return -EINVAL; | |
1842 | ||
75b1f2f8 AL |
1843 | memcpy(t, s, sizeof(*s)); |
1844 | ||
452503f9 AC |
1845 | /* |
1846 | * If the drive is an EIDE drive, it can tell us it needs extended | |
1847 | * PIO/MW_DMA cycle timing. | |
1848 | */ | |
1849 | ||
1850 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
1851 | memset(&p, 0, sizeof(p)); | |
1852 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
1853 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
1854 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
1855 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
1856 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
1857 | } | |
1858 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
1859 | } | |
1860 | ||
1861 | /* | |
1862 | * Convert the timing to bus clock counts. | |
1863 | */ | |
1864 | ||
75b1f2f8 | 1865 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
1866 | |
1867 | /* | |
c893a3ae RD |
1868 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
1869 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
1870 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
1871 | */ |
1872 | ||
1873 | if (speed > XFER_PIO_4) { | |
1874 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); | |
1875 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
1876 | } | |
1877 | ||
1878 | /* | |
c893a3ae | 1879 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
1880 | */ |
1881 | ||
1882 | if (t->act8b + t->rec8b < t->cyc8b) { | |
1883 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
1884 | t->rec8b = t->cyc8b - t->act8b; | |
1885 | } | |
1886 | ||
1887 | if (t->active + t->recover < t->cycle) { | |
1888 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
1889 | t->recover = t->cycle - t->active; | |
1890 | } | |
1891 | ||
1892 | return 0; | |
1893 | } | |
1894 | ||
cf176e1a TH |
1895 | /** |
1896 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
1897 | * @ap: Port associated with device @dev | |
1898 | * @dev: Device to adjust xfer masks | |
1899 | * @force_pio0: Force PIO0 | |
1900 | * | |
1901 | * Adjust xfer masks of @dev downward. Note that this function | |
1902 | * does not apply the change. Invoking ata_set_mode() afterwards | |
1903 | * will apply the limit. | |
1904 | * | |
1905 | * LOCKING: | |
1906 | * Inherited from caller. | |
1907 | * | |
1908 | * RETURNS: | |
1909 | * 0 on success, negative errno on failure | |
1910 | */ | |
1ad8e7f9 TH |
1911 | int ata_down_xfermask_limit(struct ata_port *ap, struct ata_device *dev, |
1912 | int force_pio0) | |
cf176e1a TH |
1913 | { |
1914 | unsigned long xfer_mask; | |
1915 | int highbit; | |
1916 | ||
1917 | xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask, | |
1918 | dev->udma_mask); | |
1919 | ||
1920 | if (!xfer_mask) | |
1921 | goto fail; | |
1922 | /* don't gear down to MWDMA from UDMA, go directly to PIO */ | |
1923 | if (xfer_mask & ATA_MASK_UDMA) | |
1924 | xfer_mask &= ~ATA_MASK_MWDMA; | |
1925 | ||
1926 | highbit = fls(xfer_mask) - 1; | |
1927 | xfer_mask &= ~(1 << highbit); | |
1928 | if (force_pio0) | |
1929 | xfer_mask &= 1 << ATA_SHIFT_PIO; | |
1930 | if (!xfer_mask) | |
1931 | goto fail; | |
1932 | ||
1933 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
1934 | &dev->udma_mask); | |
1935 | ||
1936 | printk(KERN_WARNING "ata%u: dev %u limiting speed to %s\n", | |
1937 | ap->id, dev->devno, ata_mode_string(xfer_mask)); | |
1938 | ||
1939 | return 0; | |
1940 | ||
1941 | fail: | |
1942 | return -EINVAL; | |
1943 | } | |
1944 | ||
83206a29 | 1945 | static int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev) |
1da177e4 | 1946 | { |
83206a29 TH |
1947 | unsigned int err_mask; |
1948 | int rc; | |
1da177e4 | 1949 | |
e8384607 | 1950 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
1951 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
1952 | dev->flags |= ATA_DFLAG_PIO; | |
1953 | ||
83206a29 TH |
1954 | err_mask = ata_dev_set_xfermode(ap, dev); |
1955 | if (err_mask) { | |
1956 | printk(KERN_ERR | |
1957 | "ata%u: failed to set xfermode (err_mask=0x%x)\n", | |
1958 | ap->id, err_mask); | |
1959 | return -EIO; | |
1960 | } | |
1da177e4 | 1961 | |
83206a29 | 1962 | rc = ata_dev_revalidate(ap, dev, 0); |
5eb45c02 | 1963 | if (rc) |
83206a29 | 1964 | return rc; |
48a8a14f | 1965 | |
23e71c3d TH |
1966 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
1967 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 LT |
1968 | |
1969 | printk(KERN_INFO "ata%u: dev %u configured for %s\n", | |
23e71c3d TH |
1970 | ap->id, dev->devno, |
1971 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
83206a29 | 1972 | return 0; |
1da177e4 LT |
1973 | } |
1974 | ||
1da177e4 LT |
1975 | /** |
1976 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
1977 | * @ap: port on which timings will be programmed | |
e82cbdb9 | 1978 | * @r_failed_dev: out paramter for failed device |
1da177e4 | 1979 | * |
e82cbdb9 TH |
1980 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
1981 | * ata_set_mode() fails, pointer to the failing device is | |
1982 | * returned in @r_failed_dev. | |
780a87f7 | 1983 | * |
1da177e4 | 1984 | * LOCKING: |
0cba632b | 1985 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
1986 | * |
1987 | * RETURNS: | |
1988 | * 0 on success, negative errno otherwise | |
1da177e4 | 1989 | */ |
1ad8e7f9 | 1990 | int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) |
1da177e4 | 1991 | { |
e8e0619f | 1992 | struct ata_device *dev; |
e82cbdb9 | 1993 | int i, rc = 0, used_dma = 0, found = 0; |
1da177e4 | 1994 | |
a6d5a51c TH |
1995 | /* step 1: calculate xfer_mask */ |
1996 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
acf356b1 | 1997 | unsigned int pio_mask, dma_mask; |
a6d5a51c | 1998 | |
e8e0619f TH |
1999 | dev = &ap->device[i]; |
2000 | ||
e1211e3f | 2001 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
2002 | continue; |
2003 | ||
acf356b1 | 2004 | ata_dev_xfermask(ap, dev); |
1da177e4 | 2005 | |
acf356b1 TH |
2006 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
2007 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
2008 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); | |
2009 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 2010 | |
4f65977d | 2011 | found = 1; |
5444a6f4 AC |
2012 | if (dev->dma_mode) |
2013 | used_dma = 1; | |
a6d5a51c | 2014 | } |
4f65977d | 2015 | if (!found) |
e82cbdb9 | 2016 | goto out; |
a6d5a51c TH |
2017 | |
2018 | /* step 2: always set host PIO timings */ | |
e8e0619f TH |
2019 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2020 | dev = &ap->device[i]; | |
2021 | if (!ata_dev_enabled(dev)) | |
2022 | continue; | |
2023 | ||
2024 | if (!dev->pio_mode) { | |
2025 | printk(KERN_WARNING "ata%u: dev %u no PIO support\n", | |
2026 | ap->id, dev->devno); | |
2027 | rc = -EINVAL; | |
e82cbdb9 | 2028 | goto out; |
e8e0619f TH |
2029 | } |
2030 | ||
2031 | dev->xfer_mode = dev->pio_mode; | |
2032 | dev->xfer_shift = ATA_SHIFT_PIO; | |
2033 | if (ap->ops->set_piomode) | |
2034 | ap->ops->set_piomode(ap, dev); | |
2035 | } | |
1da177e4 | 2036 | |
a6d5a51c | 2037 | /* step 3: set host DMA timings */ |
e8e0619f TH |
2038 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2039 | dev = &ap->device[i]; | |
2040 | ||
2041 | if (!ata_dev_enabled(dev) || !dev->dma_mode) | |
2042 | continue; | |
2043 | ||
2044 | dev->xfer_mode = dev->dma_mode; | |
2045 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
2046 | if (ap->ops->set_dmamode) | |
2047 | ap->ops->set_dmamode(ap, dev); | |
2048 | } | |
1da177e4 LT |
2049 | |
2050 | /* step 4: update devices' xfer mode */ | |
83206a29 | 2051 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
e8e0619f | 2052 | dev = &ap->device[i]; |
1da177e4 | 2053 | |
e1211e3f | 2054 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
2055 | continue; |
2056 | ||
5bbc53f4 TH |
2057 | rc = ata_dev_set_mode(ap, dev); |
2058 | if (rc) | |
e82cbdb9 | 2059 | goto out; |
83206a29 | 2060 | } |
1da177e4 | 2061 | |
e8e0619f TH |
2062 | /* Record simplex status. If we selected DMA then the other |
2063 | * host channels are not permitted to do so. | |
5444a6f4 | 2064 | */ |
5444a6f4 AC |
2065 | if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX)) |
2066 | ap->host_set->simplex_claimed = 1; | |
2067 | ||
e8e0619f | 2068 | /* step5: chip specific finalisation */ |
1da177e4 LT |
2069 | if (ap->ops->post_set_mode) |
2070 | ap->ops->post_set_mode(ap); | |
2071 | ||
e82cbdb9 TH |
2072 | out: |
2073 | if (rc) | |
2074 | *r_failed_dev = dev; | |
2075 | return rc; | |
1da177e4 LT |
2076 | } |
2077 | ||
1fdffbce JG |
2078 | /** |
2079 | * ata_tf_to_host - issue ATA taskfile to host controller | |
2080 | * @ap: port to which command is being issued | |
2081 | * @tf: ATA taskfile register set | |
2082 | * | |
2083 | * Issues ATA taskfile register set to ATA host controller, | |
2084 | * with proper synchronization with interrupt handler and | |
2085 | * other threads. | |
2086 | * | |
2087 | * LOCKING: | |
2088 | * spin_lock_irqsave(host_set lock) | |
2089 | */ | |
2090 | ||
2091 | static inline void ata_tf_to_host(struct ata_port *ap, | |
2092 | const struct ata_taskfile *tf) | |
2093 | { | |
2094 | ap->ops->tf_load(ap, tf); | |
2095 | ap->ops->exec_command(ap, tf); | |
2096 | } | |
2097 | ||
1da177e4 LT |
2098 | /** |
2099 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
2100 | * @ap: port containing status register to be polled | |
2101 | * @tmout_pat: impatience timeout | |
2102 | * @tmout: overall timeout | |
2103 | * | |
780a87f7 JG |
2104 | * Sleep until ATA Status register bit BSY clears, |
2105 | * or a timeout occurs. | |
2106 | * | |
2107 | * LOCKING: None. | |
1da177e4 LT |
2108 | */ |
2109 | ||
6f8b9958 TH |
2110 | unsigned int ata_busy_sleep (struct ata_port *ap, |
2111 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
2112 | { |
2113 | unsigned long timer_start, timeout; | |
2114 | u8 status; | |
2115 | ||
2116 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
2117 | timer_start = jiffies; | |
2118 | timeout = timer_start + tmout_pat; | |
2119 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
2120 | msleep(50); | |
2121 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
2122 | } | |
2123 | ||
2124 | if (status & ATA_BUSY) | |
2125 | printk(KERN_WARNING "ata%u is slow to respond, " | |
2126 | "please be patient\n", ap->id); | |
2127 | ||
2128 | timeout = timer_start + tmout; | |
2129 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
2130 | msleep(50); | |
2131 | status = ata_chk_status(ap); | |
2132 | } | |
2133 | ||
2134 | if (status & ATA_BUSY) { | |
2135 | printk(KERN_ERR "ata%u failed to respond (%lu secs)\n", | |
2136 | ap->id, tmout / HZ); | |
2137 | return 1; | |
2138 | } | |
2139 | ||
2140 | return 0; | |
2141 | } | |
2142 | ||
2143 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) | |
2144 | { | |
2145 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2146 | unsigned int dev0 = devmask & (1 << 0); | |
2147 | unsigned int dev1 = devmask & (1 << 1); | |
2148 | unsigned long timeout; | |
2149 | ||
2150 | /* if device 0 was found in ata_devchk, wait for its | |
2151 | * BSY bit to clear | |
2152 | */ | |
2153 | if (dev0) | |
2154 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2155 | ||
2156 | /* if device 1 was found in ata_devchk, wait for | |
2157 | * register access, then wait for BSY to clear | |
2158 | */ | |
2159 | timeout = jiffies + ATA_TMOUT_BOOT; | |
2160 | while (dev1) { | |
2161 | u8 nsect, lbal; | |
2162 | ||
2163 | ap->ops->dev_select(ap, 1); | |
2164 | if (ap->flags & ATA_FLAG_MMIO) { | |
2165 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
2166 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
2167 | } else { | |
2168 | nsect = inb(ioaddr->nsect_addr); | |
2169 | lbal = inb(ioaddr->lbal_addr); | |
2170 | } | |
2171 | if ((nsect == 1) && (lbal == 1)) | |
2172 | break; | |
2173 | if (time_after(jiffies, timeout)) { | |
2174 | dev1 = 0; | |
2175 | break; | |
2176 | } | |
2177 | msleep(50); /* give drive a breather */ | |
2178 | } | |
2179 | if (dev1) | |
2180 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2181 | ||
2182 | /* is all this really necessary? */ | |
2183 | ap->ops->dev_select(ap, 0); | |
2184 | if (dev1) | |
2185 | ap->ops->dev_select(ap, 1); | |
2186 | if (dev0) | |
2187 | ap->ops->dev_select(ap, 0); | |
2188 | } | |
2189 | ||
1da177e4 LT |
2190 | static unsigned int ata_bus_softreset(struct ata_port *ap, |
2191 | unsigned int devmask) | |
2192 | { | |
2193 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2194 | ||
2195 | DPRINTK("ata%u: bus reset via SRST\n", ap->id); | |
2196 | ||
2197 | /* software reset. causes dev0 to be selected */ | |
2198 | if (ap->flags & ATA_FLAG_MMIO) { | |
2199 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2200 | udelay(20); /* FIXME: flush */ | |
2201 | writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr); | |
2202 | udelay(20); /* FIXME: flush */ | |
2203 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2204 | } else { | |
2205 | outb(ap->ctl, ioaddr->ctl_addr); | |
2206 | udelay(10); | |
2207 | outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
2208 | udelay(10); | |
2209 | outb(ap->ctl, ioaddr->ctl_addr); | |
2210 | } | |
2211 | ||
2212 | /* spec mandates ">= 2ms" before checking status. | |
2213 | * We wait 150ms, because that was the magic delay used for | |
2214 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
2215 | * between when the ATA command register is written, and then | |
2216 | * status is checked. Because waiting for "a while" before | |
2217 | * checking status is fine, post SRST, we perform this magic | |
2218 | * delay here as well. | |
09c7ad79 AC |
2219 | * |
2220 | * Old drivers/ide uses the 2mS rule and then waits for ready | |
1da177e4 LT |
2221 | */ |
2222 | msleep(150); | |
2223 | ||
2e9edbf8 | 2224 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
2225 | * the bus shows 0xFF because the odd clown forgets the D7 |
2226 | * pulldown resistor. | |
2227 | */ | |
09c7ad79 | 2228 | if (ata_check_status(ap) == 0xFF) |
298a41ca | 2229 | return AC_ERR_OTHER; |
09c7ad79 | 2230 | |
1da177e4 LT |
2231 | ata_bus_post_reset(ap, devmask); |
2232 | ||
2233 | return 0; | |
2234 | } | |
2235 | ||
2236 | /** | |
2237 | * ata_bus_reset - reset host port and associated ATA channel | |
2238 | * @ap: port to reset | |
2239 | * | |
2240 | * This is typically the first time we actually start issuing | |
2241 | * commands to the ATA channel. We wait for BSY to clear, then | |
2242 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
2243 | * result. Determine what devices, if any, are on the channel | |
2244 | * by looking at the device 0/1 error register. Look at the signature | |
2245 | * stored in each device's taskfile registers, to determine if | |
2246 | * the device is ATA or ATAPI. | |
2247 | * | |
2248 | * LOCKING: | |
0cba632b JG |
2249 | * PCI/etc. bus probe sem. |
2250 | * Obtains host_set lock. | |
1da177e4 LT |
2251 | * |
2252 | * SIDE EFFECTS: | |
198e0fed | 2253 | * Sets ATA_FLAG_DISABLED if bus reset fails. |
1da177e4 LT |
2254 | */ |
2255 | ||
2256 | void ata_bus_reset(struct ata_port *ap) | |
2257 | { | |
2258 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2259 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2260 | u8 err; | |
aec5c3c1 | 2261 | unsigned int dev0, dev1 = 0, devmask = 0; |
1da177e4 LT |
2262 | |
2263 | DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); | |
2264 | ||
2265 | /* determine if device 0/1 are present */ | |
2266 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
2267 | dev0 = 1; | |
2268 | else { | |
2269 | dev0 = ata_devchk(ap, 0); | |
2270 | if (slave_possible) | |
2271 | dev1 = ata_devchk(ap, 1); | |
2272 | } | |
2273 | ||
2274 | if (dev0) | |
2275 | devmask |= (1 << 0); | |
2276 | if (dev1) | |
2277 | devmask |= (1 << 1); | |
2278 | ||
2279 | /* select device 0 again */ | |
2280 | ap->ops->dev_select(ap, 0); | |
2281 | ||
2282 | /* issue bus reset */ | |
2283 | if (ap->flags & ATA_FLAG_SRST) | |
aec5c3c1 TH |
2284 | if (ata_bus_softreset(ap, devmask)) |
2285 | goto err_out; | |
1da177e4 LT |
2286 | |
2287 | /* | |
2288 | * determine by signature whether we have ATA or ATAPI devices | |
2289 | */ | |
b4dc7623 | 2290 | ap->device[0].class = ata_dev_try_classify(ap, 0, &err); |
1da177e4 | 2291 | if ((slave_possible) && (err != 0x81)) |
b4dc7623 | 2292 | ap->device[1].class = ata_dev_try_classify(ap, 1, &err); |
1da177e4 LT |
2293 | |
2294 | /* re-enable interrupts */ | |
2295 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ | |
2296 | ata_irq_on(ap); | |
2297 | ||
2298 | /* is double-select really necessary? */ | |
2299 | if (ap->device[1].class != ATA_DEV_NONE) | |
2300 | ap->ops->dev_select(ap, 1); | |
2301 | if (ap->device[0].class != ATA_DEV_NONE) | |
2302 | ap->ops->dev_select(ap, 0); | |
2303 | ||
2304 | /* if no devices were detected, disable this port */ | |
2305 | if ((ap->device[0].class == ATA_DEV_NONE) && | |
2306 | (ap->device[1].class == ATA_DEV_NONE)) | |
2307 | goto err_out; | |
2308 | ||
2309 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
2310 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
2311 | if (ap->flags & ATA_FLAG_MMIO) | |
2312 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2313 | else | |
2314 | outb(ap->ctl, ioaddr->ctl_addr); | |
2315 | } | |
2316 | ||
2317 | DPRINTK("EXIT\n"); | |
2318 | return; | |
2319 | ||
2320 | err_out: | |
2321 | printk(KERN_ERR "ata%u: disabling port\n", ap->id); | |
2322 | ap->ops->port_disable(ap); | |
2323 | ||
2324 | DPRINTK("EXIT\n"); | |
2325 | } | |
2326 | ||
7a7921e8 TH |
2327 | static int sata_phy_resume(struct ata_port *ap) |
2328 | { | |
2329 | unsigned long timeout = jiffies + (HZ * 5); | |
852ee16a | 2330 | u32 scontrol, sstatus; |
7a7921e8 | 2331 | |
852ee16a TH |
2332 | scontrol = scr_read(ap, SCR_CONTROL); |
2333 | scontrol = (scontrol & 0x0f0) | 0x300; | |
2334 | scr_write_flush(ap, SCR_CONTROL, scontrol); | |
7a7921e8 TH |
2335 | |
2336 | /* Wait for phy to become ready, if necessary. */ | |
2337 | do { | |
2338 | msleep(200); | |
2339 | sstatus = scr_read(ap, SCR_STATUS); | |
2340 | if ((sstatus & 0xf) != 1) | |
2341 | return 0; | |
2342 | } while (time_before(jiffies, timeout)); | |
2343 | ||
2344 | return -1; | |
2345 | } | |
2346 | ||
8a19ac89 TH |
2347 | /** |
2348 | * ata_std_probeinit - initialize probing | |
2349 | * @ap: port to be probed | |
2350 | * | |
2351 | * @ap is about to be probed. Initialize it. This function is | |
2352 | * to be used as standard callback for ata_drive_probe_reset(). | |
3a39746a TH |
2353 | * |
2354 | * NOTE!!! Do not use this function as probeinit if a low level | |
2355 | * driver implements only hardreset. Just pass NULL as probeinit | |
2356 | * in that case. Using this function is probably okay but doing | |
2357 | * so makes reset sequence different from the original | |
2358 | * ->phy_reset implementation and Jeff nervous. :-P | |
8a19ac89 | 2359 | */ |
17efc5f7 | 2360 | void ata_std_probeinit(struct ata_port *ap) |
8a19ac89 | 2361 | { |
17efc5f7 | 2362 | if ((ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read) { |
1c3fae4d TH |
2363 | u32 spd; |
2364 | ||
8a19ac89 | 2365 | sata_phy_resume(ap); |
1c3fae4d TH |
2366 | |
2367 | spd = (scr_read(ap, SCR_CONTROL) & 0xf0) >> 4; | |
2368 | if (spd) | |
2369 | ap->sata_spd_limit &= (1 << spd) - 1; | |
2370 | ||
3a39746a TH |
2371 | if (sata_dev_present(ap)) |
2372 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2373 | } | |
8a19ac89 TH |
2374 | } |
2375 | ||
c2bd5804 TH |
2376 | /** |
2377 | * ata_std_softreset - reset host port via ATA SRST | |
2378 | * @ap: port to reset | |
2379 | * @verbose: fail verbosely | |
2380 | * @classes: resulting classes of attached devices | |
2381 | * | |
2382 | * Reset host port using ATA SRST. This function is to be used | |
2383 | * as standard callback for ata_drive_*_reset() functions. | |
2384 | * | |
2385 | * LOCKING: | |
2386 | * Kernel thread context (may sleep) | |
2387 | * | |
2388 | * RETURNS: | |
2389 | * 0 on success, -errno otherwise. | |
2390 | */ | |
2391 | int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) | |
2392 | { | |
2393 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2394 | unsigned int devmask = 0, err_mask; | |
2395 | u8 err; | |
2396 | ||
2397 | DPRINTK("ENTER\n"); | |
2398 | ||
3a39746a TH |
2399 | if (ap->ops->scr_read && !sata_dev_present(ap)) { |
2400 | classes[0] = ATA_DEV_NONE; | |
2401 | goto out; | |
2402 | } | |
2403 | ||
c2bd5804 TH |
2404 | /* determine if device 0/1 are present */ |
2405 | if (ata_devchk(ap, 0)) | |
2406 | devmask |= (1 << 0); | |
2407 | if (slave_possible && ata_devchk(ap, 1)) | |
2408 | devmask |= (1 << 1); | |
2409 | ||
c2bd5804 TH |
2410 | /* select device 0 again */ |
2411 | ap->ops->dev_select(ap, 0); | |
2412 | ||
2413 | /* issue bus reset */ | |
2414 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
2415 | err_mask = ata_bus_softreset(ap, devmask); | |
2416 | if (err_mask) { | |
2417 | if (verbose) | |
2418 | printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n", | |
2419 | ap->id, err_mask); | |
2420 | else | |
2421 | DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n", | |
2422 | err_mask); | |
2423 | return -EIO; | |
2424 | } | |
2425 | ||
2426 | /* determine by signature whether we have ATA or ATAPI devices */ | |
2427 | classes[0] = ata_dev_try_classify(ap, 0, &err); | |
2428 | if (slave_possible && err != 0x81) | |
2429 | classes[1] = ata_dev_try_classify(ap, 1, &err); | |
2430 | ||
3a39746a | 2431 | out: |
c2bd5804 TH |
2432 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
2433 | return 0; | |
2434 | } | |
2435 | ||
2436 | /** | |
2437 | * sata_std_hardreset - reset host port via SATA phy reset | |
2438 | * @ap: port to reset | |
2439 | * @verbose: fail verbosely | |
2440 | * @class: resulting class of attached device | |
2441 | * | |
2442 | * SATA phy-reset host port using DET bits of SControl register. | |
2443 | * This function is to be used as standard callback for | |
2444 | * ata_drive_*_reset(). | |
2445 | * | |
2446 | * LOCKING: | |
2447 | * Kernel thread context (may sleep) | |
2448 | * | |
2449 | * RETURNS: | |
2450 | * 0 on success, -errno otherwise. | |
2451 | */ | |
2452 | int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class) | |
2453 | { | |
852ee16a TH |
2454 | u32 scontrol; |
2455 | ||
c2bd5804 TH |
2456 | DPRINTK("ENTER\n"); |
2457 | ||
1c3fae4d TH |
2458 | if (ata_set_sata_spd_needed(ap)) { |
2459 | /* SATA spec says nothing about how to reconfigure | |
2460 | * spd. To be on the safe side, turn off phy during | |
2461 | * reconfiguration. This works for at least ICH7 AHCI | |
2462 | * and Sil3124. | |
2463 | */ | |
2464 | scontrol = scr_read(ap, SCR_CONTROL); | |
2465 | scontrol = (scontrol & 0x0f0) | 0x302; | |
2466 | scr_write_flush(ap, SCR_CONTROL, scontrol); | |
2467 | ||
2468 | ata_set_sata_spd(ap); | |
2469 | } | |
2470 | ||
2471 | /* issue phy wake/reset */ | |
852ee16a TH |
2472 | scontrol = scr_read(ap, SCR_CONTROL); |
2473 | scontrol = (scontrol & 0x0f0) | 0x301; | |
2474 | scr_write_flush(ap, SCR_CONTROL, scontrol); | |
c2bd5804 | 2475 | |
1c3fae4d | 2476 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
2477 | * 10.4.2 says at least 1 ms. |
2478 | */ | |
2479 | msleep(1); | |
2480 | ||
1c3fae4d | 2481 | /* bring phy back */ |
7a7921e8 | 2482 | sata_phy_resume(ap); |
c2bd5804 | 2483 | |
c2bd5804 TH |
2484 | /* TODO: phy layer with polling, timeouts, etc. */ |
2485 | if (!sata_dev_present(ap)) { | |
2486 | *class = ATA_DEV_NONE; | |
2487 | DPRINTK("EXIT, link offline\n"); | |
2488 | return 0; | |
2489 | } | |
2490 | ||
2491 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
2492 | if (verbose) | |
2493 | printk(KERN_ERR "ata%u: COMRESET failed " | |
2494 | "(device not ready)\n", ap->id); | |
2495 | else | |
2496 | DPRINTK("EXIT, device not ready\n"); | |
2497 | return -EIO; | |
2498 | } | |
2499 | ||
3a39746a TH |
2500 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
2501 | ||
c2bd5804 TH |
2502 | *class = ata_dev_try_classify(ap, 0, NULL); |
2503 | ||
2504 | DPRINTK("EXIT, class=%u\n", *class); | |
2505 | return 0; | |
2506 | } | |
2507 | ||
2508 | /** | |
2509 | * ata_std_postreset - standard postreset callback | |
2510 | * @ap: the target ata_port | |
2511 | * @classes: classes of attached devices | |
2512 | * | |
2513 | * This function is invoked after a successful reset. Note that | |
2514 | * the device might have been reset more than once using | |
2515 | * different reset methods before postreset is invoked. | |
c2bd5804 TH |
2516 | * |
2517 | * This function is to be used as standard callback for | |
2518 | * ata_drive_*_reset(). | |
2519 | * | |
2520 | * LOCKING: | |
2521 | * Kernel thread context (may sleep) | |
2522 | */ | |
2523 | void ata_std_postreset(struct ata_port *ap, unsigned int *classes) | |
2524 | { | |
2525 | DPRINTK("ENTER\n"); | |
2526 | ||
56497bd5 | 2527 | /* set cable type if it isn't already set */ |
c2bd5804 TH |
2528 | if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA) |
2529 | ap->cbl = ATA_CBL_SATA; | |
2530 | ||
2531 | /* print link status */ | |
2532 | if (ap->cbl == ATA_CBL_SATA) | |
2533 | sata_print_link_status(ap); | |
2534 | ||
3a39746a TH |
2535 | /* re-enable interrupts */ |
2536 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ | |
2537 | ata_irq_on(ap); | |
c2bd5804 TH |
2538 | |
2539 | /* is double-select really necessary? */ | |
2540 | if (classes[0] != ATA_DEV_NONE) | |
2541 | ap->ops->dev_select(ap, 1); | |
2542 | if (classes[1] != ATA_DEV_NONE) | |
2543 | ap->ops->dev_select(ap, 0); | |
2544 | ||
3a39746a TH |
2545 | /* bail out if no device is present */ |
2546 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
2547 | DPRINTK("EXIT, no device\n"); | |
2548 | return; | |
2549 | } | |
2550 | ||
2551 | /* set up device control */ | |
2552 | if (ap->ioaddr.ctl_addr) { | |
2553 | if (ap->flags & ATA_FLAG_MMIO) | |
2554 | writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr); | |
2555 | else | |
2556 | outb(ap->ctl, ap->ioaddr.ctl_addr); | |
2557 | } | |
c2bd5804 TH |
2558 | |
2559 | DPRINTK("EXIT\n"); | |
2560 | } | |
2561 | ||
2562 | /** | |
2563 | * ata_std_probe_reset - standard probe reset method | |
2564 | * @ap: prot to perform probe-reset | |
2565 | * @classes: resulting classes of attached devices | |
2566 | * | |
2567 | * The stock off-the-shelf ->probe_reset method. | |
2568 | * | |
2569 | * LOCKING: | |
2570 | * Kernel thread context (may sleep) | |
2571 | * | |
2572 | * RETURNS: | |
2573 | * 0 on success, -errno otherwise. | |
2574 | */ | |
2575 | int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes) | |
2576 | { | |
2577 | ata_reset_fn_t hardreset; | |
2578 | ||
2579 | hardreset = NULL; | |
b911fc3a | 2580 | if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) |
c2bd5804 TH |
2581 | hardreset = sata_std_hardreset; |
2582 | ||
8a19ac89 | 2583 | return ata_drive_probe_reset(ap, ata_std_probeinit, |
7944ea95 | 2584 | ata_std_softreset, hardreset, |
c2bd5804 TH |
2585 | ata_std_postreset, classes); |
2586 | } | |
2587 | ||
1ad8e7f9 TH |
2588 | int ata_do_reset(struct ata_port *ap, |
2589 | ata_reset_fn_t reset, ata_postreset_fn_t postreset, | |
2590 | int verbose, unsigned int *classes) | |
a62c0fc5 TH |
2591 | { |
2592 | int i, rc; | |
2593 | ||
2594 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2595 | classes[i] = ATA_DEV_UNKNOWN; | |
2596 | ||
9974e7cc | 2597 | rc = reset(ap, verbose, classes); |
a62c0fc5 TH |
2598 | if (rc) |
2599 | return rc; | |
2600 | ||
2601 | /* If any class isn't ATA_DEV_UNKNOWN, consider classification | |
2602 | * is complete and convert all ATA_DEV_UNKNOWN to | |
2603 | * ATA_DEV_NONE. | |
2604 | */ | |
2605 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2606 | if (classes[i] != ATA_DEV_UNKNOWN) | |
2607 | break; | |
2608 | ||
2609 | if (i < ATA_MAX_DEVICES) | |
2610 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2611 | if (classes[i] == ATA_DEV_UNKNOWN) | |
2612 | classes[i] = ATA_DEV_NONE; | |
2613 | ||
2614 | if (postreset) | |
2615 | postreset(ap, classes); | |
2616 | ||
9974e7cc | 2617 | return 0; |
a62c0fc5 TH |
2618 | } |
2619 | ||
2620 | /** | |
2621 | * ata_drive_probe_reset - Perform probe reset with given methods | |
2622 | * @ap: port to reset | |
7944ea95 | 2623 | * @probeinit: probeinit method (can be NULL) |
a62c0fc5 TH |
2624 | * @softreset: softreset method (can be NULL) |
2625 | * @hardreset: hardreset method (can be NULL) | |
2626 | * @postreset: postreset method (can be NULL) | |
2627 | * @classes: resulting classes of attached devices | |
2628 | * | |
2629 | * Reset the specified port and classify attached devices using | |
2630 | * given methods. This function prefers softreset but tries all | |
2631 | * possible reset sequences to reset and classify devices. This | |
2632 | * function is intended to be used for constructing ->probe_reset | |
2633 | * callback by low level drivers. | |
2634 | * | |
2635 | * Reset methods should follow the following rules. | |
2636 | * | |
2637 | * - Return 0 on sucess, -errno on failure. | |
2638 | * - If classification is supported, fill classes[] with | |
2639 | * recognized class codes. | |
2640 | * - If classification is not supported, leave classes[] alone. | |
2641 | * - If verbose is non-zero, print error message on failure; | |
2642 | * otherwise, shut up. | |
2643 | * | |
2644 | * LOCKING: | |
2645 | * Kernel thread context (may sleep) | |
2646 | * | |
2647 | * RETURNS: | |
2648 | * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV | |
2649 | * if classification fails, and any error code from reset | |
2650 | * methods. | |
2651 | */ | |
7944ea95 | 2652 | int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit, |
a62c0fc5 TH |
2653 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
2654 | ata_postreset_fn_t postreset, unsigned int *classes) | |
2655 | { | |
2656 | int rc = -EINVAL; | |
2657 | ||
7944ea95 TH |
2658 | if (probeinit) |
2659 | probeinit(ap); | |
2660 | ||
90dac02c | 2661 | if (softreset && !ata_set_sata_spd_needed(ap)) { |
9974e7cc TH |
2662 | rc = ata_do_reset(ap, softreset, postreset, 0, classes); |
2663 | if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN) | |
2664 | goto done; | |
edbabd86 TH |
2665 | printk(KERN_INFO "ata%u: softreset failed, will try " |
2666 | "hardreset in 5 secs\n", ap->id); | |
2667 | ssleep(5); | |
a62c0fc5 TH |
2668 | } |
2669 | ||
2670 | if (!hardreset) | |
9974e7cc | 2671 | goto done; |
a62c0fc5 | 2672 | |
90dac02c TH |
2673 | while (1) { |
2674 | rc = ata_do_reset(ap, hardreset, postreset, 0, classes); | |
2675 | if (rc == 0) { | |
2676 | if (classes[0] != ATA_DEV_UNKNOWN) | |
2677 | goto done; | |
2678 | break; | |
2679 | } | |
2680 | ||
2681 | if (ata_down_sata_spd_limit(ap)) | |
2682 | goto done; | |
edbabd86 TH |
2683 | |
2684 | printk(KERN_INFO "ata%u: hardreset failed, will retry " | |
2685 | "in 5 secs\n", ap->id); | |
2686 | ssleep(5); | |
90dac02c | 2687 | } |
a62c0fc5 | 2688 | |
edbabd86 TH |
2689 | if (softreset) { |
2690 | printk(KERN_INFO "ata%u: hardreset succeeded without " | |
2691 | "classification, will retry softreset in 5 secs\n", | |
2692 | ap->id); | |
2693 | ssleep(5); | |
2694 | ||
9974e7cc | 2695 | rc = ata_do_reset(ap, softreset, postreset, 0, classes); |
edbabd86 | 2696 | } |
a62c0fc5 | 2697 | |
9974e7cc TH |
2698 | done: |
2699 | if (rc == 0 && classes[0] == ATA_DEV_UNKNOWN) | |
2700 | rc = -ENODEV; | |
a62c0fc5 TH |
2701 | return rc; |
2702 | } | |
2703 | ||
623a3128 TH |
2704 | /** |
2705 | * ata_dev_same_device - Determine whether new ID matches configured device | |
2706 | * @ap: port on which the device to compare against resides | |
2707 | * @dev: device to compare against | |
2708 | * @new_class: class of the new device | |
2709 | * @new_id: IDENTIFY page of the new device | |
2710 | * | |
2711 | * Compare @new_class and @new_id against @dev and determine | |
2712 | * whether @dev is the device indicated by @new_class and | |
2713 | * @new_id. | |
2714 | * | |
2715 | * LOCKING: | |
2716 | * None. | |
2717 | * | |
2718 | * RETURNS: | |
2719 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
2720 | */ | |
2721 | static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev, | |
2722 | unsigned int new_class, const u16 *new_id) | |
2723 | { | |
2724 | const u16 *old_id = dev->id; | |
2725 | unsigned char model[2][41], serial[2][21]; | |
2726 | u64 new_n_sectors; | |
2727 | ||
2728 | if (dev->class != new_class) { | |
2729 | printk(KERN_INFO | |
2730 | "ata%u: dev %u class mismatch %d != %d\n", | |
2731 | ap->id, dev->devno, dev->class, new_class); | |
2732 | return 0; | |
2733 | } | |
2734 | ||
2735 | ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0])); | |
2736 | ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1])); | |
2737 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0])); | |
2738 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1])); | |
2739 | new_n_sectors = ata_id_n_sectors(new_id); | |
2740 | ||
2741 | if (strcmp(model[0], model[1])) { | |
2742 | printk(KERN_INFO | |
2743 | "ata%u: dev %u model number mismatch '%s' != '%s'\n", | |
2744 | ap->id, dev->devno, model[0], model[1]); | |
2745 | return 0; | |
2746 | } | |
2747 | ||
2748 | if (strcmp(serial[0], serial[1])) { | |
2749 | printk(KERN_INFO | |
2750 | "ata%u: dev %u serial number mismatch '%s' != '%s'\n", | |
2751 | ap->id, dev->devno, serial[0], serial[1]); | |
2752 | return 0; | |
2753 | } | |
2754 | ||
2755 | if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { | |
2756 | printk(KERN_INFO | |
2757 | "ata%u: dev %u n_sectors mismatch %llu != %llu\n", | |
2758 | ap->id, dev->devno, (unsigned long long)dev->n_sectors, | |
2759 | (unsigned long long)new_n_sectors); | |
2760 | return 0; | |
2761 | } | |
2762 | ||
2763 | return 1; | |
2764 | } | |
2765 | ||
2766 | /** | |
2767 | * ata_dev_revalidate - Revalidate ATA device | |
2768 | * @ap: port on which the device to revalidate resides | |
2769 | * @dev: device to revalidate | |
2770 | * @post_reset: is this revalidation after reset? | |
2771 | * | |
2772 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
2773 | * the port. | |
2774 | * | |
2775 | * LOCKING: | |
2776 | * Kernel thread context (may sleep) | |
2777 | * | |
2778 | * RETURNS: | |
2779 | * 0 on success, negative errno otherwise | |
2780 | */ | |
2781 | int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev, | |
2782 | int post_reset) | |
2783 | { | |
5eb45c02 TH |
2784 | unsigned int class = dev->class; |
2785 | u16 *id = NULL; | |
623a3128 TH |
2786 | int rc; |
2787 | ||
5eb45c02 TH |
2788 | if (!ata_dev_enabled(dev)) { |
2789 | rc = -ENODEV; | |
2790 | goto fail; | |
2791 | } | |
623a3128 TH |
2792 | |
2793 | /* allocate & read ID data */ | |
2794 | rc = ata_dev_read_id(ap, dev, &class, post_reset, &id); | |
2795 | if (rc) | |
2796 | goto fail; | |
2797 | ||
2798 | /* is the device still there? */ | |
2799 | if (!ata_dev_same_device(ap, dev, class, id)) { | |
2800 | rc = -ENODEV; | |
2801 | goto fail; | |
2802 | } | |
2803 | ||
2804 | kfree(dev->id); | |
2805 | dev->id = id; | |
2806 | ||
2807 | /* configure device according to the new ID */ | |
5eb45c02 TH |
2808 | rc = ata_dev_configure(ap, dev, 0); |
2809 | if (rc == 0) | |
2810 | return 0; | |
623a3128 TH |
2811 | |
2812 | fail: | |
2813 | printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n", | |
2814 | ap->id, dev->devno, rc); | |
2815 | kfree(id); | |
2816 | return rc; | |
2817 | } | |
2818 | ||
98ac62de | 2819 | static const char * const ata_dma_blacklist [] = { |
f4b15fef AC |
2820 | "WDC AC11000H", NULL, |
2821 | "WDC AC22100H", NULL, | |
2822 | "WDC AC32500H", NULL, | |
2823 | "WDC AC33100H", NULL, | |
2824 | "WDC AC31600H", NULL, | |
2825 | "WDC AC32100H", "24.09P07", | |
2826 | "WDC AC23200L", "21.10N21", | |
2827 | "Compaq CRD-8241B", NULL, | |
2828 | "CRD-8400B", NULL, | |
2829 | "CRD-8480B", NULL, | |
2830 | "CRD-8482B", NULL, | |
2831 | "CRD-84", NULL, | |
2832 | "SanDisk SDP3B", NULL, | |
2833 | "SanDisk SDP3B-64", NULL, | |
2834 | "SANYO CD-ROM CRD", NULL, | |
2835 | "HITACHI CDR-8", NULL, | |
2e9edbf8 | 2836 | "HITACHI CDR-8335", NULL, |
f4b15fef | 2837 | "HITACHI CDR-8435", NULL, |
2e9edbf8 JG |
2838 | "Toshiba CD-ROM XM-6202B", NULL, |
2839 | "TOSHIBA CD-ROM XM-1702BC", NULL, | |
2840 | "CD-532E-A", NULL, | |
2841 | "E-IDE CD-ROM CR-840", NULL, | |
2842 | "CD-ROM Drive/F5A", NULL, | |
2843 | "WPI CDD-820", NULL, | |
f4b15fef | 2844 | "SAMSUNG CD-ROM SC-148C", NULL, |
2e9edbf8 | 2845 | "SAMSUNG CD-ROM SC", NULL, |
f4b15fef AC |
2846 | "SanDisk SDP3B-64", NULL, |
2847 | "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL, | |
2848 | "_NEC DV5800A", NULL, | |
2849 | "SAMSUNG CD-ROM SN-124", "N001" | |
1da177e4 | 2850 | }; |
2e9edbf8 | 2851 | |
f4b15fef AC |
2852 | static int ata_strim(char *s, size_t len) |
2853 | { | |
2854 | len = strnlen(s, len); | |
2855 | ||
2856 | /* ATAPI specifies that empty space is blank-filled; remove blanks */ | |
2857 | while ((len > 0) && (s[len - 1] == ' ')) { | |
2858 | len--; | |
2859 | s[len] = 0; | |
2860 | } | |
2861 | return len; | |
2862 | } | |
1da177e4 | 2863 | |
057ace5e | 2864 | static int ata_dma_blacklisted(const struct ata_device *dev) |
1da177e4 | 2865 | { |
f4b15fef AC |
2866 | unsigned char model_num[40]; |
2867 | unsigned char model_rev[16]; | |
2868 | unsigned int nlen, rlen; | |
1da177e4 LT |
2869 | int i; |
2870 | ||
f4b15fef AC |
2871 | ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS, |
2872 | sizeof(model_num)); | |
2873 | ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS, | |
2874 | sizeof(model_rev)); | |
2875 | nlen = ata_strim(model_num, sizeof(model_num)); | |
2876 | rlen = ata_strim(model_rev, sizeof(model_rev)); | |
1da177e4 | 2877 | |
f4b15fef AC |
2878 | for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) { |
2879 | if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) { | |
2880 | if (ata_dma_blacklist[i+1] == NULL) | |
2881 | return 1; | |
2882 | if (!strncmp(ata_dma_blacklist[i], model_rev, rlen)) | |
2883 | return 1; | |
2884 | } | |
2885 | } | |
1da177e4 LT |
2886 | return 0; |
2887 | } | |
2888 | ||
a6d5a51c TH |
2889 | /** |
2890 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
2891 | * @ap: Port on which the device to compute xfermask for resides | |
2892 | * @dev: Device to compute xfermask for | |
2893 | * | |
acf356b1 TH |
2894 | * Compute supported xfermask of @dev and store it in |
2895 | * dev->*_mask. This function is responsible for applying all | |
2896 | * known limits including host controller limits, device | |
2897 | * blacklist, etc... | |
a6d5a51c | 2898 | * |
600511e8 TH |
2899 | * FIXME: The current implementation limits all transfer modes to |
2900 | * the fastest of the lowested device on the port. This is not | |
05c8e0ac | 2901 | * required on most controllers. |
600511e8 | 2902 | * |
a6d5a51c TH |
2903 | * LOCKING: |
2904 | * None. | |
a6d5a51c | 2905 | */ |
acf356b1 | 2906 | static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev) |
1da177e4 | 2907 | { |
5444a6f4 | 2908 | struct ata_host_set *hs = ap->host_set; |
a6d5a51c TH |
2909 | unsigned long xfer_mask; |
2910 | int i; | |
1da177e4 | 2911 | |
565083e1 TH |
2912 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
2913 | ap->mwdma_mask, ap->udma_mask); | |
2914 | ||
2915 | /* Apply cable rule here. Don't apply it early because when | |
2916 | * we handle hot plug the cable type can itself change. | |
2917 | */ | |
2918 | if (ap->cbl == ATA_CBL_PATA40) | |
2919 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
1da177e4 | 2920 | |
5444a6f4 | 2921 | /* FIXME: Use port-wide xfermask for now */ |
a6d5a51c TH |
2922 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2923 | struct ata_device *d = &ap->device[i]; | |
565083e1 TH |
2924 | |
2925 | if (ata_dev_absent(d)) | |
2926 | continue; | |
2927 | ||
2928 | if (ata_dev_disabled(d)) { | |
2929 | /* to avoid violating device selection timing */ | |
2930 | xfer_mask &= ata_pack_xfermask(d->pio_mask, | |
2931 | UINT_MAX, UINT_MAX); | |
a6d5a51c | 2932 | continue; |
565083e1 TH |
2933 | } |
2934 | ||
2935 | xfer_mask &= ata_pack_xfermask(d->pio_mask, | |
2936 | d->mwdma_mask, d->udma_mask); | |
a6d5a51c TH |
2937 | xfer_mask &= ata_id_xfermask(d->id); |
2938 | if (ata_dma_blacklisted(d)) | |
2939 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
1da177e4 LT |
2940 | } |
2941 | ||
a6d5a51c TH |
2942 | if (ata_dma_blacklisted(dev)) |
2943 | printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, " | |
2944 | "disabling DMA\n", ap->id, dev->devno); | |
2945 | ||
5444a6f4 AC |
2946 | if (hs->flags & ATA_HOST_SIMPLEX) { |
2947 | if (hs->simplex_claimed) | |
2948 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
2949 | } | |
565083e1 | 2950 | |
5444a6f4 AC |
2951 | if (ap->ops->mode_filter) |
2952 | xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask); | |
2953 | ||
565083e1 TH |
2954 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
2955 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
2956 | } |
2957 | ||
1da177e4 LT |
2958 | /** |
2959 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
2960 | * @ap: Port associated with device @dev | |
2961 | * @dev: Device to which command will be sent | |
2962 | * | |
780a87f7 JG |
2963 | * Issue SET FEATURES - XFER MODE command to device @dev |
2964 | * on port @ap. | |
2965 | * | |
1da177e4 | 2966 | * LOCKING: |
0cba632b | 2967 | * PCI/etc. bus probe sem. |
83206a29 TH |
2968 | * |
2969 | * RETURNS: | |
2970 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
2971 | */ |
2972 | ||
83206a29 TH |
2973 | static unsigned int ata_dev_set_xfermode(struct ata_port *ap, |
2974 | struct ata_device *dev) | |
1da177e4 | 2975 | { |
a0123703 | 2976 | struct ata_taskfile tf; |
83206a29 | 2977 | unsigned int err_mask; |
1da177e4 LT |
2978 | |
2979 | /* set up set-features taskfile */ | |
2980 | DPRINTK("set features - xfer mode\n"); | |
2981 | ||
a0123703 TH |
2982 | ata_tf_init(ap, &tf, dev->devno); |
2983 | tf.command = ATA_CMD_SET_FEATURES; | |
2984 | tf.feature = SETFEATURES_XFER; | |
2985 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2986 | tf.protocol = ATA_PROT_NODATA; | |
2987 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 2988 | |
d69cf37d | 2989 | err_mask = ata_exec_internal(ap, dev, &tf, NULL, DMA_NONE, NULL, 0); |
1da177e4 | 2990 | |
83206a29 TH |
2991 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
2992 | return err_mask; | |
1da177e4 LT |
2993 | } |
2994 | ||
8bf62ece AL |
2995 | /** |
2996 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
2997 | * @ap: Port associated with device @dev | |
2998 | * @dev: Device to which command will be sent | |
2999 | * | |
3000 | * LOCKING: | |
6aff8f1f TH |
3001 | * Kernel thread context (may sleep) |
3002 | * | |
3003 | * RETURNS: | |
3004 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece AL |
3005 | */ |
3006 | ||
6aff8f1f | 3007 | static unsigned int ata_dev_init_params(struct ata_port *ap, |
00b6f5e9 AL |
3008 | struct ata_device *dev, |
3009 | u16 heads, | |
3010 | u16 sectors) | |
8bf62ece | 3011 | { |
a0123703 | 3012 | struct ata_taskfile tf; |
6aff8f1f | 3013 | unsigned int err_mask; |
8bf62ece AL |
3014 | |
3015 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
3016 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 3017 | return AC_ERR_INVALID; |
8bf62ece AL |
3018 | |
3019 | /* set up init dev params taskfile */ | |
3020 | DPRINTK("init dev params \n"); | |
3021 | ||
a0123703 TH |
3022 | ata_tf_init(ap, &tf, dev->devno); |
3023 | tf.command = ATA_CMD_INIT_DEV_PARAMS; | |
3024 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
3025 | tf.protocol = ATA_PROT_NODATA; | |
3026 | tf.nsect = sectors; | |
3027 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 3028 | |
d69cf37d | 3029 | err_mask = ata_exec_internal(ap, dev, &tf, NULL, DMA_NONE, NULL, 0); |
8bf62ece | 3030 | |
6aff8f1f TH |
3031 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
3032 | return err_mask; | |
8bf62ece AL |
3033 | } |
3034 | ||
1da177e4 | 3035 | /** |
0cba632b JG |
3036 | * ata_sg_clean - Unmap DMA memory associated with command |
3037 | * @qc: Command containing DMA memory to be released | |
3038 | * | |
3039 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
3040 | * |
3041 | * LOCKING: | |
0cba632b | 3042 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
3043 | */ |
3044 | ||
3045 | static void ata_sg_clean(struct ata_queued_cmd *qc) | |
3046 | { | |
3047 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 3048 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3049 | int dir = qc->dma_dir; |
cedc9a47 | 3050 | void *pad_buf = NULL; |
1da177e4 | 3051 | |
a4631474 TH |
3052 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
3053 | WARN_ON(sg == NULL); | |
1da177e4 LT |
3054 | |
3055 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 3056 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 3057 | |
2c13b7ce | 3058 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 3059 | |
cedc9a47 JG |
3060 | /* if we padded the buffer out to 32-bit bound, and data |
3061 | * xfer direction is from-device, we must copy from the | |
3062 | * pad buffer back into the supplied buffer | |
3063 | */ | |
3064 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
3065 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3066 | ||
3067 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d | 3068 | if (qc->n_elem) |
2f1f610b | 3069 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
cedc9a47 JG |
3070 | /* restore last sg */ |
3071 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
3072 | if (pad_buf) { | |
3073 | struct scatterlist *psg = &qc->pad_sgent; | |
3074 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3075 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
dfa15988 | 3076 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3077 | } |
3078 | } else { | |
2e242fa9 | 3079 | if (qc->n_elem) |
2f1f610b | 3080 | dma_unmap_single(ap->dev, |
e1410f2d JG |
3081 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
3082 | dir); | |
cedc9a47 JG |
3083 | /* restore sg */ |
3084 | sg->length += qc->pad_len; | |
3085 | if (pad_buf) | |
3086 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
3087 | pad_buf, qc->pad_len); | |
3088 | } | |
1da177e4 LT |
3089 | |
3090 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 3091 | qc->__sg = NULL; |
1da177e4 LT |
3092 | } |
3093 | ||
3094 | /** | |
3095 | * ata_fill_sg - Fill PCI IDE PRD table | |
3096 | * @qc: Metadata associated with taskfile to be transferred | |
3097 | * | |
780a87f7 JG |
3098 | * Fill PCI IDE PRD (scatter-gather) table with segments |
3099 | * associated with the current disk command. | |
3100 | * | |
1da177e4 | 3101 | * LOCKING: |
780a87f7 | 3102 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
3103 | * |
3104 | */ | |
3105 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
3106 | { | |
1da177e4 | 3107 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
3108 | struct scatterlist *sg; |
3109 | unsigned int idx; | |
1da177e4 | 3110 | |
a4631474 | 3111 | WARN_ON(qc->__sg == NULL); |
f131883e | 3112 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
3113 | |
3114 | idx = 0; | |
cedc9a47 | 3115 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
3116 | u32 addr, offset; |
3117 | u32 sg_len, len; | |
3118 | ||
3119 | /* determine if physical DMA addr spans 64K boundary. | |
3120 | * Note h/w doesn't support 64-bit, so we unconditionally | |
3121 | * truncate dma_addr_t to u32. | |
3122 | */ | |
3123 | addr = (u32) sg_dma_address(sg); | |
3124 | sg_len = sg_dma_len(sg); | |
3125 | ||
3126 | while (sg_len) { | |
3127 | offset = addr & 0xffff; | |
3128 | len = sg_len; | |
3129 | if ((offset + sg_len) > 0x10000) | |
3130 | len = 0x10000 - offset; | |
3131 | ||
3132 | ap->prd[idx].addr = cpu_to_le32(addr); | |
3133 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
3134 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
3135 | ||
3136 | idx++; | |
3137 | sg_len -= len; | |
3138 | addr += len; | |
3139 | } | |
3140 | } | |
3141 | ||
3142 | if (idx) | |
3143 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
3144 | } | |
3145 | /** | |
3146 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
3147 | * @qc: Metadata associated with taskfile to check | |
3148 | * | |
780a87f7 JG |
3149 | * Allow low-level driver to filter ATA PACKET commands, returning |
3150 | * a status indicating whether or not it is OK to use DMA for the | |
3151 | * supplied PACKET command. | |
3152 | * | |
1da177e4 | 3153 | * LOCKING: |
0cba632b JG |
3154 | * spin_lock_irqsave(host_set lock) |
3155 | * | |
1da177e4 LT |
3156 | * RETURNS: 0 when ATAPI DMA can be used |
3157 | * nonzero otherwise | |
3158 | */ | |
3159 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
3160 | { | |
3161 | struct ata_port *ap = qc->ap; | |
3162 | int rc = 0; /* Assume ATAPI DMA is OK by default */ | |
3163 | ||
3164 | if (ap->ops->check_atapi_dma) | |
3165 | rc = ap->ops->check_atapi_dma(qc); | |
3166 | ||
3167 | return rc; | |
3168 | } | |
3169 | /** | |
3170 | * ata_qc_prep - Prepare taskfile for submission | |
3171 | * @qc: Metadata associated with taskfile to be prepared | |
3172 | * | |
780a87f7 JG |
3173 | * Prepare ATA taskfile for submission. |
3174 | * | |
1da177e4 LT |
3175 | * LOCKING: |
3176 | * spin_lock_irqsave(host_set lock) | |
3177 | */ | |
3178 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
3179 | { | |
3180 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
3181 | return; | |
3182 | ||
3183 | ata_fill_sg(qc); | |
3184 | } | |
3185 | ||
e46834cd BK |
3186 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
3187 | ||
0cba632b JG |
3188 | /** |
3189 | * ata_sg_init_one - Associate command with memory buffer | |
3190 | * @qc: Command to be associated | |
3191 | * @buf: Memory buffer | |
3192 | * @buflen: Length of memory buffer, in bytes. | |
3193 | * | |
3194 | * Initialize the data-related elements of queued_cmd @qc | |
3195 | * to point to a single memory buffer, @buf of byte length @buflen. | |
3196 | * | |
3197 | * LOCKING: | |
3198 | * spin_lock_irqsave(host_set lock) | |
3199 | */ | |
3200 | ||
1da177e4 LT |
3201 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
3202 | { | |
3203 | struct scatterlist *sg; | |
3204 | ||
3205 | qc->flags |= ATA_QCFLAG_SINGLE; | |
3206 | ||
3207 | memset(&qc->sgent, 0, sizeof(qc->sgent)); | |
cedc9a47 | 3208 | qc->__sg = &qc->sgent; |
1da177e4 | 3209 | qc->n_elem = 1; |
cedc9a47 | 3210 | qc->orig_n_elem = 1; |
1da177e4 LT |
3211 | qc->buf_virt = buf; |
3212 | ||
cedc9a47 | 3213 | sg = qc->__sg; |
f0612bbc | 3214 | sg_init_one(sg, buf, buflen); |
1da177e4 LT |
3215 | } |
3216 | ||
0cba632b JG |
3217 | /** |
3218 | * ata_sg_init - Associate command with scatter-gather table. | |
3219 | * @qc: Command to be associated | |
3220 | * @sg: Scatter-gather table. | |
3221 | * @n_elem: Number of elements in s/g table. | |
3222 | * | |
3223 | * Initialize the data-related elements of queued_cmd @qc | |
3224 | * to point to a scatter-gather table @sg, containing @n_elem | |
3225 | * elements. | |
3226 | * | |
3227 | * LOCKING: | |
3228 | * spin_lock_irqsave(host_set lock) | |
3229 | */ | |
3230 | ||
1da177e4 LT |
3231 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
3232 | unsigned int n_elem) | |
3233 | { | |
3234 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 3235 | qc->__sg = sg; |
1da177e4 | 3236 | qc->n_elem = n_elem; |
cedc9a47 | 3237 | qc->orig_n_elem = n_elem; |
1da177e4 LT |
3238 | } |
3239 | ||
3240 | /** | |
0cba632b JG |
3241 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
3242 | * @qc: Command with memory buffer to be mapped. | |
3243 | * | |
3244 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
3245 | * |
3246 | * LOCKING: | |
3247 | * spin_lock_irqsave(host_set lock) | |
3248 | * | |
3249 | * RETURNS: | |
0cba632b | 3250 | * Zero on success, negative on error. |
1da177e4 LT |
3251 | */ |
3252 | ||
3253 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
3254 | { | |
3255 | struct ata_port *ap = qc->ap; | |
3256 | int dir = qc->dma_dir; | |
cedc9a47 | 3257 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3258 | dma_addr_t dma_address; |
2e242fa9 | 3259 | int trim_sg = 0; |
1da177e4 | 3260 | |
cedc9a47 JG |
3261 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3262 | qc->pad_len = sg->length & 3; | |
3263 | if (qc->pad_len) { | |
3264 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3265 | struct scatterlist *psg = &qc->pad_sgent; | |
3266 | ||
a4631474 | 3267 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3268 | |
3269 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3270 | ||
3271 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
3272 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
3273 | qc->pad_len); | |
3274 | ||
3275 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3276 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3277 | /* trim sg */ | |
3278 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
3279 | if (sg->length == 0) |
3280 | trim_sg = 1; | |
cedc9a47 JG |
3281 | |
3282 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
3283 | sg->length, qc->pad_len); | |
3284 | } | |
3285 | ||
2e242fa9 TH |
3286 | if (trim_sg) { |
3287 | qc->n_elem--; | |
e1410f2d JG |
3288 | goto skip_map; |
3289 | } | |
3290 | ||
2f1f610b | 3291 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
32529e01 | 3292 | sg->length, dir); |
537a95d9 TH |
3293 | if (dma_mapping_error(dma_address)) { |
3294 | /* restore sg */ | |
3295 | sg->length += qc->pad_len; | |
1da177e4 | 3296 | return -1; |
537a95d9 | 3297 | } |
1da177e4 LT |
3298 | |
3299 | sg_dma_address(sg) = dma_address; | |
32529e01 | 3300 | sg_dma_len(sg) = sg->length; |
1da177e4 | 3301 | |
2e242fa9 | 3302 | skip_map: |
1da177e4 LT |
3303 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
3304 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3305 | ||
3306 | return 0; | |
3307 | } | |
3308 | ||
3309 | /** | |
0cba632b JG |
3310 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
3311 | * @qc: Command with scatter-gather table to be mapped. | |
3312 | * | |
3313 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
3314 | * |
3315 | * LOCKING: | |
3316 | * spin_lock_irqsave(host_set lock) | |
3317 | * | |
3318 | * RETURNS: | |
0cba632b | 3319 | * Zero on success, negative on error. |
1da177e4 LT |
3320 | * |
3321 | */ | |
3322 | ||
3323 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
3324 | { | |
3325 | struct ata_port *ap = qc->ap; | |
cedc9a47 JG |
3326 | struct scatterlist *sg = qc->__sg; |
3327 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
e1410f2d | 3328 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 LT |
3329 | |
3330 | VPRINTK("ENTER, ata%u\n", ap->id); | |
a4631474 | 3331 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 3332 | |
cedc9a47 JG |
3333 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3334 | qc->pad_len = lsg->length & 3; | |
3335 | if (qc->pad_len) { | |
3336 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3337 | struct scatterlist *psg = &qc->pad_sgent; | |
3338 | unsigned int offset; | |
3339 | ||
a4631474 | 3340 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3341 | |
3342 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3343 | ||
3344 | /* | |
3345 | * psg->page/offset are used to copy to-be-written | |
3346 | * data in this function or read data in ata_sg_clean. | |
3347 | */ | |
3348 | offset = lsg->offset + lsg->length - qc->pad_len; | |
3349 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
3350 | psg->offset = offset_in_page(offset); | |
3351 | ||
3352 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
3353 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3354 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
dfa15988 | 3355 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3356 | } |
3357 | ||
3358 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3359 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3360 | /* trim last sg */ | |
3361 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
3362 | if (lsg->length == 0) |
3363 | trim_sg = 1; | |
cedc9a47 JG |
3364 | |
3365 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
3366 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
3367 | } | |
3368 | ||
e1410f2d JG |
3369 | pre_n_elem = qc->n_elem; |
3370 | if (trim_sg && pre_n_elem) | |
3371 | pre_n_elem--; | |
3372 | ||
3373 | if (!pre_n_elem) { | |
3374 | n_elem = 0; | |
3375 | goto skip_map; | |
3376 | } | |
3377 | ||
1da177e4 | 3378 | dir = qc->dma_dir; |
2f1f610b | 3379 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
3380 | if (n_elem < 1) { |
3381 | /* restore last sg */ | |
3382 | lsg->length += qc->pad_len; | |
1da177e4 | 3383 | return -1; |
537a95d9 | 3384 | } |
1da177e4 LT |
3385 | |
3386 | DPRINTK("%d sg elements mapped\n", n_elem); | |
3387 | ||
e1410f2d | 3388 | skip_map: |
1da177e4 LT |
3389 | qc->n_elem = n_elem; |
3390 | ||
3391 | return 0; | |
3392 | } | |
3393 | ||
40e8c82c TH |
3394 | /** |
3395 | * ata_poll_qc_complete - turn irq back on and finish qc | |
3396 | * @qc: Command to complete | |
8e8b77dd | 3397 | * @err_mask: ATA status register content |
40e8c82c TH |
3398 | * |
3399 | * LOCKING: | |
3400 | * None. (grabs host lock) | |
3401 | */ | |
3402 | ||
a22e2eb0 | 3403 | void ata_poll_qc_complete(struct ata_queued_cmd *qc) |
40e8c82c TH |
3404 | { |
3405 | struct ata_port *ap = qc->ap; | |
b8f6153e | 3406 | unsigned long flags; |
40e8c82c | 3407 | |
b8f6153e | 3408 | spin_lock_irqsave(&ap->host_set->lock, flags); |
40e8c82c TH |
3409 | ap->flags &= ~ATA_FLAG_NOINTR; |
3410 | ata_irq_on(ap); | |
a22e2eb0 | 3411 | ata_qc_complete(qc); |
b8f6153e | 3412 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
40e8c82c TH |
3413 | } |
3414 | ||
1da177e4 | 3415 | /** |
c893a3ae | 3416 | * ata_pio_poll - poll using PIO, depending on current state |
c91af2c8 | 3417 | * @qc: qc in progress |
1da177e4 LT |
3418 | * |
3419 | * LOCKING: | |
0cba632b | 3420 | * None. (executing in kernel thread context) |
1da177e4 LT |
3421 | * |
3422 | * RETURNS: | |
6f0ef4fa | 3423 | * timeout value to use |
1da177e4 | 3424 | */ |
c91af2c8 | 3425 | static unsigned long ata_pio_poll(struct ata_queued_cmd *qc) |
1da177e4 | 3426 | { |
c91af2c8 | 3427 | struct ata_port *ap = qc->ap; |
1da177e4 | 3428 | u8 status; |
14be71f4 AL |
3429 | unsigned int poll_state = HSM_ST_UNKNOWN; |
3430 | unsigned int reg_state = HSM_ST_UNKNOWN; | |
14be71f4 AL |
3431 | |
3432 | switch (ap->hsm_task_state) { | |
3433 | case HSM_ST: | |
3434 | case HSM_ST_POLL: | |
3435 | poll_state = HSM_ST_POLL; | |
3436 | reg_state = HSM_ST; | |
1da177e4 | 3437 | break; |
14be71f4 AL |
3438 | case HSM_ST_LAST: |
3439 | case HSM_ST_LAST_POLL: | |
3440 | poll_state = HSM_ST_LAST_POLL; | |
3441 | reg_state = HSM_ST_LAST; | |
1da177e4 LT |
3442 | break; |
3443 | default: | |
3444 | BUG(); | |
3445 | break; | |
3446 | } | |
3447 | ||
3448 | status = ata_chk_status(ap); | |
3449 | if (status & ATA_BUSY) { | |
3450 | if (time_after(jiffies, ap->pio_task_timeout)) { | |
11a56d24 | 3451 | qc->err_mask |= AC_ERR_TIMEOUT; |
7c398335 | 3452 | ap->hsm_task_state = HSM_ST_TMOUT; |
1da177e4 LT |
3453 | return 0; |
3454 | } | |
14be71f4 | 3455 | ap->hsm_task_state = poll_state; |
1da177e4 LT |
3456 | return ATA_SHORT_PAUSE; |
3457 | } | |
3458 | ||
14be71f4 | 3459 | ap->hsm_task_state = reg_state; |
1da177e4 LT |
3460 | return 0; |
3461 | } | |
3462 | ||
3463 | /** | |
6f0ef4fa | 3464 | * ata_pio_complete - check if drive is busy or idle |
c91af2c8 | 3465 | * @qc: qc to complete |
1da177e4 LT |
3466 | * |
3467 | * LOCKING: | |
0cba632b | 3468 | * None. (executing in kernel thread context) |
7fb6ec28 JG |
3469 | * |
3470 | * RETURNS: | |
3471 | * Non-zero if qc completed, zero otherwise. | |
1da177e4 | 3472 | */ |
c91af2c8 | 3473 | static int ata_pio_complete(struct ata_queued_cmd *qc) |
1da177e4 | 3474 | { |
c91af2c8 | 3475 | struct ata_port *ap = qc->ap; |
1da177e4 LT |
3476 | u8 drv_stat; |
3477 | ||
3478 | /* | |
31433ea3 AC |
3479 | * This is purely heuristic. This is a fast path. Sometimes when |
3480 | * we enter, BSY will be cleared in a chk-status or two. If not, | |
3481 | * the drive is probably seeking or something. Snooze for a couple | |
3482 | * msecs, then chk-status again. If still busy, fall back to | |
14be71f4 | 3483 | * HSM_ST_POLL state. |
1da177e4 | 3484 | */ |
fe79e683 AL |
3485 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
3486 | if (drv_stat & ATA_BUSY) { | |
1da177e4 | 3487 | msleep(2); |
fe79e683 AL |
3488 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
3489 | if (drv_stat & ATA_BUSY) { | |
14be71f4 | 3490 | ap->hsm_task_state = HSM_ST_LAST_POLL; |
1da177e4 | 3491 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
7fb6ec28 | 3492 | return 0; |
1da177e4 LT |
3493 | } |
3494 | } | |
3495 | ||
3496 | drv_stat = ata_wait_idle(ap); | |
3497 | if (!ata_ok(drv_stat)) { | |
1c848984 | 3498 | qc->err_mask |= __ac_err_mask(drv_stat); |
14be71f4 | 3499 | ap->hsm_task_state = HSM_ST_ERR; |
7fb6ec28 | 3500 | return 0; |
1da177e4 LT |
3501 | } |
3502 | ||
14be71f4 | 3503 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 3504 | |
a4631474 | 3505 | WARN_ON(qc->err_mask); |
a22e2eb0 | 3506 | ata_poll_qc_complete(qc); |
7fb6ec28 JG |
3507 | |
3508 | /* another command may start at this point */ | |
3509 | ||
3510 | return 1; | |
1da177e4 LT |
3511 | } |
3512 | ||
0baab86b EF |
3513 | |
3514 | /** | |
c893a3ae | 3515 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
3516 | * @buf: Buffer to swap |
3517 | * @buf_words: Number of 16-bit words in buffer. | |
3518 | * | |
3519 | * Swap halves of 16-bit words if needed to convert from | |
3520 | * little-endian byte order to native cpu byte order, or | |
3521 | * vice-versa. | |
3522 | * | |
3523 | * LOCKING: | |
6f0ef4fa | 3524 | * Inherited from caller. |
0baab86b | 3525 | */ |
1da177e4 LT |
3526 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
3527 | { | |
3528 | #ifdef __BIG_ENDIAN | |
3529 | unsigned int i; | |
3530 | ||
3531 | for (i = 0; i < buf_words; i++) | |
3532 | buf[i] = le16_to_cpu(buf[i]); | |
3533 | #endif /* __BIG_ENDIAN */ | |
3534 | } | |
3535 | ||
6ae4cfb5 AL |
3536 | /** |
3537 | * ata_mmio_data_xfer - Transfer data by MMIO | |
3538 | * @ap: port to read/write | |
3539 | * @buf: data buffer | |
3540 | * @buflen: buffer length | |
344babaa | 3541 | * @write_data: read/write |
6ae4cfb5 AL |
3542 | * |
3543 | * Transfer data from/to the device data register by MMIO. | |
3544 | * | |
3545 | * LOCKING: | |
3546 | * Inherited from caller. | |
6ae4cfb5 AL |
3547 | */ |
3548 | ||
1da177e4 LT |
3549 | static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3550 | unsigned int buflen, int write_data) | |
3551 | { | |
3552 | unsigned int i; | |
3553 | unsigned int words = buflen >> 1; | |
3554 | u16 *buf16 = (u16 *) buf; | |
3555 | void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr; | |
3556 | ||
6ae4cfb5 | 3557 | /* Transfer multiple of 2 bytes */ |
1da177e4 LT |
3558 | if (write_data) { |
3559 | for (i = 0; i < words; i++) | |
3560 | writew(le16_to_cpu(buf16[i]), mmio); | |
3561 | } else { | |
3562 | for (i = 0; i < words; i++) | |
3563 | buf16[i] = cpu_to_le16(readw(mmio)); | |
3564 | } | |
6ae4cfb5 AL |
3565 | |
3566 | /* Transfer trailing 1 byte, if any. */ | |
3567 | if (unlikely(buflen & 0x01)) { | |
3568 | u16 align_buf[1] = { 0 }; | |
3569 | unsigned char *trailing_buf = buf + buflen - 1; | |
3570 | ||
3571 | if (write_data) { | |
3572 | memcpy(align_buf, trailing_buf, 1); | |
3573 | writew(le16_to_cpu(align_buf[0]), mmio); | |
3574 | } else { | |
3575 | align_buf[0] = cpu_to_le16(readw(mmio)); | |
3576 | memcpy(trailing_buf, align_buf, 1); | |
3577 | } | |
3578 | } | |
1da177e4 LT |
3579 | } |
3580 | ||
6ae4cfb5 AL |
3581 | /** |
3582 | * ata_pio_data_xfer - Transfer data by PIO | |
3583 | * @ap: port to read/write | |
3584 | * @buf: data buffer | |
3585 | * @buflen: buffer length | |
344babaa | 3586 | * @write_data: read/write |
6ae4cfb5 AL |
3587 | * |
3588 | * Transfer data from/to the device data register by PIO. | |
3589 | * | |
3590 | * LOCKING: | |
3591 | * Inherited from caller. | |
6ae4cfb5 AL |
3592 | */ |
3593 | ||
1da177e4 LT |
3594 | static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3595 | unsigned int buflen, int write_data) | |
3596 | { | |
6ae4cfb5 | 3597 | unsigned int words = buflen >> 1; |
1da177e4 | 3598 | |
6ae4cfb5 | 3599 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 3600 | if (write_data) |
6ae4cfb5 | 3601 | outsw(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 3602 | else |
6ae4cfb5 AL |
3603 | insw(ap->ioaddr.data_addr, buf, words); |
3604 | ||
3605 | /* Transfer trailing 1 byte, if any. */ | |
3606 | if (unlikely(buflen & 0x01)) { | |
3607 | u16 align_buf[1] = { 0 }; | |
3608 | unsigned char *trailing_buf = buf + buflen - 1; | |
3609 | ||
3610 | if (write_data) { | |
3611 | memcpy(align_buf, trailing_buf, 1); | |
3612 | outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); | |
3613 | } else { | |
3614 | align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr)); | |
3615 | memcpy(trailing_buf, align_buf, 1); | |
3616 | } | |
3617 | } | |
1da177e4 LT |
3618 | } |
3619 | ||
6ae4cfb5 AL |
3620 | /** |
3621 | * ata_data_xfer - Transfer data from/to the data register. | |
3622 | * @ap: port to read/write | |
3623 | * @buf: data buffer | |
3624 | * @buflen: buffer length | |
3625 | * @do_write: read/write | |
3626 | * | |
3627 | * Transfer data from/to the device data register. | |
3628 | * | |
3629 | * LOCKING: | |
3630 | * Inherited from caller. | |
6ae4cfb5 AL |
3631 | */ |
3632 | ||
1da177e4 LT |
3633 | static void ata_data_xfer(struct ata_port *ap, unsigned char *buf, |
3634 | unsigned int buflen, int do_write) | |
3635 | { | |
a1bd9e68 AC |
3636 | /* Make the crap hardware pay the costs not the good stuff */ |
3637 | if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) { | |
3638 | unsigned long flags; | |
3639 | local_irq_save(flags); | |
3640 | if (ap->flags & ATA_FLAG_MMIO) | |
3641 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3642 | else | |
3643 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3644 | local_irq_restore(flags); | |
3645 | } else { | |
3646 | if (ap->flags & ATA_FLAG_MMIO) | |
3647 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3648 | else | |
3649 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3650 | } | |
1da177e4 LT |
3651 | } |
3652 | ||
6ae4cfb5 AL |
3653 | /** |
3654 | * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. | |
3655 | * @qc: Command on going | |
3656 | * | |
3657 | * Transfer ATA_SECT_SIZE of data from/to the ATA device. | |
3658 | * | |
3659 | * LOCKING: | |
3660 | * Inherited from caller. | |
3661 | */ | |
3662 | ||
1da177e4 LT |
3663 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
3664 | { | |
3665 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3666 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3667 | struct ata_port *ap = qc->ap; |
3668 | struct page *page; | |
3669 | unsigned int offset; | |
3670 | unsigned char *buf; | |
3671 | ||
3672 | if (qc->cursect == (qc->nsect - 1)) | |
14be71f4 | 3673 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3674 | |
3675 | page = sg[qc->cursg].page; | |
3676 | offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; | |
3677 | ||
3678 | /* get the current page and offset */ | |
3679 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3680 | offset %= PAGE_SIZE; | |
3681 | ||
3682 | buf = kmap(page) + offset; | |
3683 | ||
3684 | qc->cursect++; | |
3685 | qc->cursg_ofs++; | |
3686 | ||
32529e01 | 3687 | if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) { |
1da177e4 LT |
3688 | qc->cursg++; |
3689 | qc->cursg_ofs = 0; | |
3690 | } | |
3691 | ||
3692 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3693 | ||
3694 | /* do the actual data transfer */ | |
3695 | do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
3696 | ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write); | |
3697 | ||
3698 | kunmap(page); | |
3699 | } | |
3700 | ||
6ae4cfb5 AL |
3701 | /** |
3702 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3703 | * @qc: Command on going | |
3704 | * @bytes: number of bytes | |
3705 | * | |
3706 | * Transfer Transfer data from/to the ATAPI device. | |
3707 | * | |
3708 | * LOCKING: | |
3709 | * Inherited from caller. | |
3710 | * | |
3711 | */ | |
3712 | ||
1da177e4 LT |
3713 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
3714 | { | |
3715 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3716 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3717 | struct ata_port *ap = qc->ap; |
3718 | struct page *page; | |
3719 | unsigned char *buf; | |
3720 | unsigned int offset, count; | |
3721 | ||
563a6e1f | 3722 | if (qc->curbytes + bytes >= qc->nbytes) |
14be71f4 | 3723 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3724 | |
3725 | next_sg: | |
563a6e1f | 3726 | if (unlikely(qc->cursg >= qc->n_elem)) { |
7fb6ec28 | 3727 | /* |
563a6e1f AL |
3728 | * The end of qc->sg is reached and the device expects |
3729 | * more data to transfer. In order not to overrun qc->sg | |
3730 | * and fulfill length specified in the byte count register, | |
3731 | * - for read case, discard trailing data from the device | |
3732 | * - for write case, padding zero data to the device | |
3733 | */ | |
3734 | u16 pad_buf[1] = { 0 }; | |
3735 | unsigned int words = bytes >> 1; | |
3736 | unsigned int i; | |
3737 | ||
3738 | if (words) /* warning if bytes > 1 */ | |
7fb6ec28 | 3739 | printk(KERN_WARNING "ata%u: %u bytes trailing data\n", |
563a6e1f AL |
3740 | ap->id, bytes); |
3741 | ||
3742 | for (i = 0; i < words; i++) | |
3743 | ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write); | |
3744 | ||
14be71f4 | 3745 | ap->hsm_task_state = HSM_ST_LAST; |
563a6e1f AL |
3746 | return; |
3747 | } | |
3748 | ||
cedc9a47 | 3749 | sg = &qc->__sg[qc->cursg]; |
1da177e4 | 3750 | |
1da177e4 LT |
3751 | page = sg->page; |
3752 | offset = sg->offset + qc->cursg_ofs; | |
3753 | ||
3754 | /* get the current page and offset */ | |
3755 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3756 | offset %= PAGE_SIZE; | |
3757 | ||
6952df03 | 3758 | /* don't overrun current sg */ |
32529e01 | 3759 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
3760 | |
3761 | /* don't cross page boundaries */ | |
3762 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
3763 | ||
3764 | buf = kmap(page) + offset; | |
3765 | ||
3766 | bytes -= count; | |
3767 | qc->curbytes += count; | |
3768 | qc->cursg_ofs += count; | |
3769 | ||
32529e01 | 3770 | if (qc->cursg_ofs == sg->length) { |
1da177e4 LT |
3771 | qc->cursg++; |
3772 | qc->cursg_ofs = 0; | |
3773 | } | |
3774 | ||
3775 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3776 | ||
3777 | /* do the actual data transfer */ | |
3778 | ata_data_xfer(ap, buf, count, do_write); | |
3779 | ||
3780 | kunmap(page); | |
3781 | ||
563a6e1f | 3782 | if (bytes) |
1da177e4 | 3783 | goto next_sg; |
1da177e4 LT |
3784 | } |
3785 | ||
6ae4cfb5 AL |
3786 | /** |
3787 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3788 | * @qc: Command on going | |
3789 | * | |
3790 | * Transfer Transfer data from/to the ATAPI device. | |
3791 | * | |
3792 | * LOCKING: | |
3793 | * Inherited from caller. | |
6ae4cfb5 AL |
3794 | */ |
3795 | ||
1da177e4 LT |
3796 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
3797 | { | |
3798 | struct ata_port *ap = qc->ap; | |
3799 | struct ata_device *dev = qc->dev; | |
3800 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
3801 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
3802 | ||
3803 | ap->ops->tf_read(ap, &qc->tf); | |
3804 | ireason = qc->tf.nsect; | |
3805 | bc_lo = qc->tf.lbam; | |
3806 | bc_hi = qc->tf.lbah; | |
3807 | bytes = (bc_hi << 8) | bc_lo; | |
3808 | ||
3809 | /* shall be cleared to zero, indicating xfer of data */ | |
3810 | if (ireason & (1 << 0)) | |
3811 | goto err_out; | |
3812 | ||
3813 | /* make sure transfer direction matches expected */ | |
3814 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
3815 | if (do_write != i_write) | |
3816 | goto err_out; | |
3817 | ||
3818 | __atapi_pio_bytes(qc, bytes); | |
3819 | ||
3820 | return; | |
3821 | ||
3822 | err_out: | |
3823 | printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n", | |
3824 | ap->id, dev->devno); | |
11a56d24 | 3825 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3826 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
3827 | } |
3828 | ||
3829 | /** | |
6f0ef4fa | 3830 | * ata_pio_block - start PIO on a block |
c91af2c8 | 3831 | * @qc: qc to transfer block for |
1da177e4 LT |
3832 | * |
3833 | * LOCKING: | |
0cba632b | 3834 | * None. (executing in kernel thread context) |
1da177e4 | 3835 | */ |
c91af2c8 | 3836 | static void ata_pio_block(struct ata_queued_cmd *qc) |
1da177e4 | 3837 | { |
c91af2c8 | 3838 | struct ata_port *ap = qc->ap; |
1da177e4 LT |
3839 | u8 status; |
3840 | ||
3841 | /* | |
6f0ef4fa | 3842 | * This is purely heuristic. This is a fast path. |
1da177e4 LT |
3843 | * Sometimes when we enter, BSY will be cleared in |
3844 | * a chk-status or two. If not, the drive is probably seeking | |
3845 | * or something. Snooze for a couple msecs, then | |
3846 | * chk-status again. If still busy, fall back to | |
14be71f4 | 3847 | * HSM_ST_POLL state. |
1da177e4 LT |
3848 | */ |
3849 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
3850 | if (status & ATA_BUSY) { | |
3851 | msleep(2); | |
3852 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
3853 | if (status & ATA_BUSY) { | |
14be71f4 | 3854 | ap->hsm_task_state = HSM_ST_POLL; |
1da177e4 LT |
3855 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
3856 | return; | |
3857 | } | |
3858 | } | |
3859 | ||
fe79e683 AL |
3860 | /* check error */ |
3861 | if (status & (ATA_ERR | ATA_DF)) { | |
3862 | qc->err_mask |= AC_ERR_DEV; | |
3863 | ap->hsm_task_state = HSM_ST_ERR; | |
3864 | return; | |
3865 | } | |
3866 | ||
3867 | /* transfer data if any */ | |
1da177e4 | 3868 | if (is_atapi_taskfile(&qc->tf)) { |
fe79e683 | 3869 | /* DRQ=0 means no more data to transfer */ |
1da177e4 | 3870 | if ((status & ATA_DRQ) == 0) { |
14be71f4 | 3871 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3872 | return; |
3873 | } | |
3874 | ||
3875 | atapi_pio_bytes(qc); | |
3876 | } else { | |
3877 | /* handle BSY=0, DRQ=0 as error */ | |
3878 | if ((status & ATA_DRQ) == 0) { | |
11a56d24 | 3879 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3880 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
3881 | return; |
3882 | } | |
3883 | ||
3884 | ata_pio_sector(qc); | |
3885 | } | |
3886 | } | |
3887 | ||
c91af2c8 | 3888 | static void ata_pio_error(struct ata_queued_cmd *qc) |
1da177e4 | 3889 | { |
c91af2c8 | 3890 | struct ata_port *ap = qc->ap; |
1da177e4 | 3891 | |
0565c26d | 3892 | if (qc->tf.command != ATA_CMD_PACKET) |
d63cb4a6 TH |
3893 | printk(KERN_WARNING "ata%u: dev %u PIO error\n", |
3894 | ap->id, qc->dev->devno); | |
0565c26d | 3895 | |
2e9edbf8 | 3896 | /* make sure qc->err_mask is available to |
1c848984 AL |
3897 | * know what's wrong and recover |
3898 | */ | |
a4631474 | 3899 | WARN_ON(qc->err_mask == 0); |
1c848984 | 3900 | |
14be71f4 | 3901 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 3902 | |
a22e2eb0 | 3903 | ata_poll_qc_complete(qc); |
1da177e4 LT |
3904 | } |
3905 | ||
3906 | static void ata_pio_task(void *_data) | |
3907 | { | |
c91af2c8 TH |
3908 | struct ata_queued_cmd *qc = _data; |
3909 | struct ata_port *ap = qc->ap; | |
7fb6ec28 JG |
3910 | unsigned long timeout; |
3911 | int qc_completed; | |
3912 | ||
3913 | fsm_start: | |
3914 | timeout = 0; | |
3915 | qc_completed = 0; | |
1da177e4 | 3916 | |
14be71f4 AL |
3917 | switch (ap->hsm_task_state) { |
3918 | case HSM_ST_IDLE: | |
1da177e4 LT |
3919 | return; |
3920 | ||
14be71f4 | 3921 | case HSM_ST: |
c91af2c8 | 3922 | ata_pio_block(qc); |
1da177e4 LT |
3923 | break; |
3924 | ||
14be71f4 | 3925 | case HSM_ST_LAST: |
c91af2c8 | 3926 | qc_completed = ata_pio_complete(qc); |
1da177e4 LT |
3927 | break; |
3928 | ||
14be71f4 AL |
3929 | case HSM_ST_POLL: |
3930 | case HSM_ST_LAST_POLL: | |
c91af2c8 | 3931 | timeout = ata_pio_poll(qc); |
1da177e4 LT |
3932 | break; |
3933 | ||
14be71f4 AL |
3934 | case HSM_ST_TMOUT: |
3935 | case HSM_ST_ERR: | |
c91af2c8 | 3936 | ata_pio_error(qc); |
1da177e4 LT |
3937 | return; |
3938 | } | |
3939 | ||
3940 | if (timeout) | |
c91af2c8 | 3941 | ata_port_queue_task(ap, ata_pio_task, qc, timeout); |
7fb6ec28 JG |
3942 | else if (!qc_completed) |
3943 | goto fsm_start; | |
1da177e4 LT |
3944 | } |
3945 | ||
8061f5f0 TH |
3946 | /** |
3947 | * atapi_packet_task - Write CDB bytes to hardware | |
c91af2c8 | 3948 | * @_data: qc in progress |
8061f5f0 TH |
3949 | * |
3950 | * When device has indicated its readiness to accept | |
3951 | * a CDB, this function is called. Send the CDB. | |
3952 | * If DMA is to be performed, exit immediately. | |
3953 | * Otherwise, we are in polling mode, so poll | |
3954 | * status under operation succeeds or fails. | |
3955 | * | |
3956 | * LOCKING: | |
3957 | * Kernel thread context (may sleep) | |
3958 | */ | |
8061f5f0 TH |
3959 | static void atapi_packet_task(void *_data) |
3960 | { | |
c91af2c8 TH |
3961 | struct ata_queued_cmd *qc = _data; |
3962 | struct ata_port *ap = qc->ap; | |
8061f5f0 TH |
3963 | u8 status; |
3964 | ||
8061f5f0 TH |
3965 | /* sleep-wait for BSY to clear */ |
3966 | DPRINTK("busy wait\n"); | |
3967 | if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) { | |
3968 | qc->err_mask |= AC_ERR_TIMEOUT; | |
3969 | goto err_out; | |
3970 | } | |
3971 | ||
3972 | /* make sure DRQ is set */ | |
3973 | status = ata_chk_status(ap); | |
3974 | if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) { | |
3975 | qc->err_mask |= AC_ERR_HSM; | |
3976 | goto err_out; | |
3977 | } | |
3978 | ||
3979 | /* send SCSI cdb */ | |
3980 | DPRINTK("send cdb\n"); | |
3981 | WARN_ON(qc->dev->cdb_len < 12); | |
3982 | ||
3983 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA || | |
3984 | qc->tf.protocol == ATA_PROT_ATAPI_NODATA) { | |
3985 | unsigned long flags; | |
3986 | ||
3987 | /* Once we're done issuing command and kicking bmdma, | |
3988 | * irq handler takes over. To not lose irq, we need | |
3989 | * to clear NOINTR flag before sending cdb, but | |
3990 | * interrupt handler shouldn't be invoked before we're | |
3991 | * finished. Hence, the following locking. | |
3992 | */ | |
3993 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
3994 | ap->flags &= ~ATA_FLAG_NOINTR; | |
3995 | ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); | |
3996 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA) | |
3997 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
3998 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
3999 | } else { | |
4000 | ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); | |
4001 | ||
4002 | /* PIO commands are handled by polling */ | |
4003 | ap->hsm_task_state = HSM_ST; | |
c91af2c8 | 4004 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
8061f5f0 TH |
4005 | } |
4006 | ||
4007 | return; | |
4008 | ||
4009 | err_out: | |
4010 | ata_poll_qc_complete(qc); | |
4011 | } | |
4012 | ||
1da177e4 LT |
4013 | /** |
4014 | * ata_qc_new - Request an available ATA command, for queueing | |
4015 | * @ap: Port associated with device @dev | |
4016 | * @dev: Device from whom we request an available command structure | |
4017 | * | |
4018 | * LOCKING: | |
0cba632b | 4019 | * None. |
1da177e4 LT |
4020 | */ |
4021 | ||
4022 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
4023 | { | |
4024 | struct ata_queued_cmd *qc = NULL; | |
4025 | unsigned int i; | |
4026 | ||
4027 | for (i = 0; i < ATA_MAX_QUEUE; i++) | |
4028 | if (!test_and_set_bit(i, &ap->qactive)) { | |
4029 | qc = ata_qc_from_tag(ap, i); | |
4030 | break; | |
4031 | } | |
4032 | ||
4033 | if (qc) | |
4034 | qc->tag = i; | |
4035 | ||
4036 | return qc; | |
4037 | } | |
4038 | ||
4039 | /** | |
4040 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
4041 | * @ap: Port associated with device @dev | |
4042 | * @dev: Device from whom we request an available command structure | |
4043 | * | |
4044 | * LOCKING: | |
0cba632b | 4045 | * None. |
1da177e4 LT |
4046 | */ |
4047 | ||
4048 | struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, | |
4049 | struct ata_device *dev) | |
4050 | { | |
4051 | struct ata_queued_cmd *qc; | |
4052 | ||
4053 | qc = ata_qc_new(ap); | |
4054 | if (qc) { | |
1da177e4 LT |
4055 | qc->scsicmd = NULL; |
4056 | qc->ap = ap; | |
4057 | qc->dev = dev; | |
1da177e4 | 4058 | |
2c13b7ce | 4059 | ata_qc_reinit(qc); |
1da177e4 LT |
4060 | } |
4061 | ||
4062 | return qc; | |
4063 | } | |
4064 | ||
1da177e4 LT |
4065 | /** |
4066 | * ata_qc_free - free unused ata_queued_cmd | |
4067 | * @qc: Command to complete | |
4068 | * | |
4069 | * Designed to free unused ata_queued_cmd object | |
4070 | * in case something prevents using it. | |
4071 | * | |
4072 | * LOCKING: | |
0cba632b | 4073 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
4074 | */ |
4075 | void ata_qc_free(struct ata_queued_cmd *qc) | |
4076 | { | |
4ba946e9 TH |
4077 | struct ata_port *ap = qc->ap; |
4078 | unsigned int tag; | |
4079 | ||
a4631474 | 4080 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 4081 | |
4ba946e9 TH |
4082 | qc->flags = 0; |
4083 | tag = qc->tag; | |
4084 | if (likely(ata_tag_valid(tag))) { | |
4085 | if (tag == ap->active_tag) | |
4086 | ap->active_tag = ATA_TAG_POISON; | |
4087 | qc->tag = ATA_TAG_POISON; | |
4088 | clear_bit(tag, &ap->qactive); | |
4089 | } | |
1da177e4 LT |
4090 | } |
4091 | ||
76014427 | 4092 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 4093 | { |
a4631474 TH |
4094 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
4095 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
4096 | |
4097 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4098 | ata_sg_clean(qc); | |
4099 | ||
3f3791d3 AL |
4100 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4101 | * from completing the command twice later, before the error handler | |
4102 | * is called. (when rc != 0 and atapi request sense is needed) | |
4103 | */ | |
4104 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
4105 | ||
1da177e4 | 4106 | /* call completion callback */ |
77853bf2 | 4107 | qc->complete_fn(qc); |
1da177e4 LT |
4108 | } |
4109 | ||
4110 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) | |
4111 | { | |
4112 | struct ata_port *ap = qc->ap; | |
4113 | ||
4114 | switch (qc->tf.protocol) { | |
4115 | case ATA_PROT_DMA: | |
4116 | case ATA_PROT_ATAPI_DMA: | |
4117 | return 1; | |
4118 | ||
4119 | case ATA_PROT_ATAPI: | |
4120 | case ATA_PROT_PIO: | |
1da177e4 LT |
4121 | if (ap->flags & ATA_FLAG_PIO_DMA) |
4122 | return 1; | |
4123 | ||
4124 | /* fall through */ | |
4125 | ||
4126 | default: | |
4127 | return 0; | |
4128 | } | |
4129 | ||
4130 | /* never reached */ | |
4131 | } | |
4132 | ||
4133 | /** | |
4134 | * ata_qc_issue - issue taskfile to device | |
4135 | * @qc: command to issue to device | |
4136 | * | |
4137 | * Prepare an ATA command to submission to device. | |
4138 | * This includes mapping the data into a DMA-able | |
4139 | * area, filling in the S/G table, and finally | |
4140 | * writing the taskfile to hardware, starting the command. | |
4141 | * | |
4142 | * LOCKING: | |
4143 | * spin_lock_irqsave(host_set lock) | |
1da177e4 | 4144 | */ |
8e0e694a | 4145 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
4146 | { |
4147 | struct ata_port *ap = qc->ap; | |
4148 | ||
e4a70e76 TH |
4149 | qc->ap->active_tag = qc->tag; |
4150 | qc->flags |= ATA_QCFLAG_ACTIVE; | |
4151 | ||
1da177e4 LT |
4152 | if (ata_should_dma_map(qc)) { |
4153 | if (qc->flags & ATA_QCFLAG_SG) { | |
4154 | if (ata_sg_setup(qc)) | |
8e436af9 | 4155 | goto sg_err; |
1da177e4 LT |
4156 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
4157 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 4158 | goto sg_err; |
1da177e4 LT |
4159 | } |
4160 | } else { | |
4161 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
4162 | } | |
4163 | ||
4164 | ap->ops->qc_prep(qc); | |
4165 | ||
8e0e694a TH |
4166 | qc->err_mask |= ap->ops->qc_issue(qc); |
4167 | if (unlikely(qc->err_mask)) | |
4168 | goto err; | |
4169 | return; | |
1da177e4 | 4170 | |
8e436af9 TH |
4171 | sg_err: |
4172 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
8e0e694a TH |
4173 | qc->err_mask |= AC_ERR_SYSTEM; |
4174 | err: | |
4175 | ata_qc_complete(qc); | |
1da177e4 LT |
4176 | } |
4177 | ||
4178 | /** | |
4179 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
4180 | * @qc: command to issue to device | |
4181 | * | |
4182 | * Using various libata functions and hooks, this function | |
4183 | * starts an ATA command. ATA commands are grouped into | |
4184 | * classes called "protocols", and issuing each type of protocol | |
4185 | * is slightly different. | |
4186 | * | |
0baab86b EF |
4187 | * May be used as the qc_issue() entry in ata_port_operations. |
4188 | * | |
1da177e4 LT |
4189 | * LOCKING: |
4190 | * spin_lock_irqsave(host_set lock) | |
4191 | * | |
4192 | * RETURNS: | |
9a3d9eb0 | 4193 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
4194 | */ |
4195 | ||
9a3d9eb0 | 4196 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
4197 | { |
4198 | struct ata_port *ap = qc->ap; | |
4199 | ||
4200 | ata_dev_select(ap, qc->dev->devno, 1, 0); | |
4201 | ||
4202 | switch (qc->tf.protocol) { | |
4203 | case ATA_PROT_NODATA: | |
e5338254 | 4204 | ata_tf_to_host(ap, &qc->tf); |
1da177e4 LT |
4205 | break; |
4206 | ||
4207 | case ATA_PROT_DMA: | |
4208 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ | |
4209 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
4210 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
4211 | break; | |
4212 | ||
4213 | case ATA_PROT_PIO: /* load tf registers, initiate polling pio */ | |
4214 | ata_qc_set_polling(qc); | |
e5338254 | 4215 | ata_tf_to_host(ap, &qc->tf); |
14be71f4 | 4216 | ap->hsm_task_state = HSM_ST; |
c91af2c8 | 4217 | ata_port_queue_task(ap, ata_pio_task, qc, 0); |
1da177e4 LT |
4218 | break; |
4219 | ||
4220 | case ATA_PROT_ATAPI: | |
4221 | ata_qc_set_polling(qc); | |
e5338254 | 4222 | ata_tf_to_host(ap, &qc->tf); |
c91af2c8 | 4223 | ata_port_queue_task(ap, atapi_packet_task, qc, 0); |
1da177e4 LT |
4224 | break; |
4225 | ||
4226 | case ATA_PROT_ATAPI_NODATA: | |
c1389503 | 4227 | ap->flags |= ATA_FLAG_NOINTR; |
e5338254 | 4228 | ata_tf_to_host(ap, &qc->tf); |
c91af2c8 | 4229 | ata_port_queue_task(ap, atapi_packet_task, qc, 0); |
1da177e4 LT |
4230 | break; |
4231 | ||
4232 | case ATA_PROT_ATAPI_DMA: | |
c1389503 | 4233 | ap->flags |= ATA_FLAG_NOINTR; |
1da177e4 LT |
4234 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
4235 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
c91af2c8 | 4236 | ata_port_queue_task(ap, atapi_packet_task, qc, 0); |
1da177e4 LT |
4237 | break; |
4238 | ||
4239 | default: | |
4240 | WARN_ON(1); | |
9a3d9eb0 | 4241 | return AC_ERR_SYSTEM; |
1da177e4 LT |
4242 | } |
4243 | ||
4244 | return 0; | |
4245 | } | |
4246 | ||
1da177e4 LT |
4247 | /** |
4248 | * ata_host_intr - Handle host interrupt for given (port, task) | |
4249 | * @ap: Port on which interrupt arrived (possibly...) | |
4250 | * @qc: Taskfile currently active in engine | |
4251 | * | |
4252 | * Handle host interrupt for given queued command. Currently, | |
4253 | * only DMA interrupts are handled. All other commands are | |
4254 | * handled via polling with interrupts disabled (nIEN bit). | |
4255 | * | |
4256 | * LOCKING: | |
4257 | * spin_lock_irqsave(host_set lock) | |
4258 | * | |
4259 | * RETURNS: | |
4260 | * One if interrupt was handled, zero if not (shared irq). | |
4261 | */ | |
4262 | ||
4263 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
4264 | struct ata_queued_cmd *qc) | |
4265 | { | |
4266 | u8 status, host_stat; | |
4267 | ||
4268 | switch (qc->tf.protocol) { | |
4269 | ||
4270 | case ATA_PROT_DMA: | |
4271 | case ATA_PROT_ATAPI_DMA: | |
4272 | case ATA_PROT_ATAPI: | |
4273 | /* check status of DMA engine */ | |
4274 | host_stat = ap->ops->bmdma_status(ap); | |
4275 | VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); | |
4276 | ||
4277 | /* if it's not our irq... */ | |
4278 | if (!(host_stat & ATA_DMA_INTR)) | |
4279 | goto idle_irq; | |
4280 | ||
4281 | /* before we do anything else, clear DMA-Start bit */ | |
b73fc89f | 4282 | ap->ops->bmdma_stop(qc); |
1da177e4 LT |
4283 | |
4284 | /* fall through */ | |
4285 | ||
4286 | case ATA_PROT_ATAPI_NODATA: | |
4287 | case ATA_PROT_NODATA: | |
4288 | /* check altstatus */ | |
4289 | status = ata_altstatus(ap); | |
4290 | if (status & ATA_BUSY) | |
4291 | goto idle_irq; | |
4292 | ||
4293 | /* check main status, clearing INTRQ */ | |
4294 | status = ata_chk_status(ap); | |
4295 | if (unlikely(status & ATA_BUSY)) | |
4296 | goto idle_irq; | |
4297 | DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", | |
4298 | ap->id, qc->tf.protocol, status); | |
4299 | ||
4300 | /* ack bmdma irq events */ | |
4301 | ap->ops->irq_clear(ap); | |
4302 | ||
4303 | /* complete taskfile transaction */ | |
a22e2eb0 AL |
4304 | qc->err_mask |= ac_err_mask(status); |
4305 | ata_qc_complete(qc); | |
1da177e4 LT |
4306 | break; |
4307 | ||
4308 | default: | |
4309 | goto idle_irq; | |
4310 | } | |
4311 | ||
4312 | return 1; /* irq handled */ | |
4313 | ||
4314 | idle_irq: | |
4315 | ap->stats.idle_irq++; | |
4316 | ||
4317 | #ifdef ATA_IRQ_TRAP | |
4318 | if ((ap->stats.idle_irq % 1000) == 0) { | |
1da177e4 LT |
4319 | ata_irq_ack(ap, 0); /* debug trap */ |
4320 | printk(KERN_WARNING "ata%d: irq trap\n", ap->id); | |
23cfce89 | 4321 | return 1; |
1da177e4 LT |
4322 | } |
4323 | #endif | |
4324 | return 0; /* irq not handled */ | |
4325 | } | |
4326 | ||
4327 | /** | |
4328 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b JG |
4329 | * @irq: irq line (unused) |
4330 | * @dev_instance: pointer to our ata_host_set information structure | |
1da177e4 LT |
4331 | * @regs: unused |
4332 | * | |
0cba632b JG |
4333 | * Default interrupt handler for PCI IDE devices. Calls |
4334 | * ata_host_intr() for each port that is not disabled. | |
4335 | * | |
1da177e4 | 4336 | * LOCKING: |
0cba632b | 4337 | * Obtains host_set lock during operation. |
1da177e4 LT |
4338 | * |
4339 | * RETURNS: | |
0cba632b | 4340 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
4341 | */ |
4342 | ||
4343 | irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) | |
4344 | { | |
4345 | struct ata_host_set *host_set = dev_instance; | |
4346 | unsigned int i; | |
4347 | unsigned int handled = 0; | |
4348 | unsigned long flags; | |
4349 | ||
4350 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
4351 | spin_lock_irqsave(&host_set->lock, flags); | |
4352 | ||
4353 | for (i = 0; i < host_set->n_ports; i++) { | |
4354 | struct ata_port *ap; | |
4355 | ||
4356 | ap = host_set->ports[i]; | |
c1389503 | 4357 | if (ap && |
198e0fed | 4358 | !(ap->flags & (ATA_FLAG_DISABLED | ATA_FLAG_NOINTR))) { |
1da177e4 LT |
4359 | struct ata_queued_cmd *qc; |
4360 | ||
4361 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
21b1ed74 AL |
4362 | if (qc && (!(qc->tf.ctl & ATA_NIEN)) && |
4363 | (qc->flags & ATA_QCFLAG_ACTIVE)) | |
1da177e4 LT |
4364 | handled |= ata_host_intr(ap, qc); |
4365 | } | |
4366 | } | |
4367 | ||
4368 | spin_unlock_irqrestore(&host_set->lock, flags); | |
4369 | ||
4370 | return IRQ_RETVAL(handled); | |
4371 | } | |
4372 | ||
0baab86b | 4373 | |
9b847548 JA |
4374 | /* |
4375 | * Execute a 'simple' command, that only consists of the opcode 'cmd' itself, | |
4376 | * without filling any other registers | |
4377 | */ | |
4378 | static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev, | |
4379 | u8 cmd) | |
4380 | { | |
4381 | struct ata_taskfile tf; | |
4382 | int err; | |
4383 | ||
4384 | ata_tf_init(ap, &tf, dev->devno); | |
4385 | ||
4386 | tf.command = cmd; | |
4387 | tf.flags |= ATA_TFLAG_DEVICE; | |
4388 | tf.protocol = ATA_PROT_NODATA; | |
4389 | ||
d69cf37d | 4390 | err = ata_exec_internal(ap, dev, &tf, NULL, DMA_NONE, NULL, 0); |
9b847548 JA |
4391 | if (err) |
4392 | printk(KERN_ERR "%s: ata command failed: %d\n", | |
4393 | __FUNCTION__, err); | |
4394 | ||
4395 | return err; | |
4396 | } | |
4397 | ||
4398 | static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev) | |
4399 | { | |
4400 | u8 cmd; | |
4401 | ||
4402 | if (!ata_try_flush_cache(dev)) | |
4403 | return 0; | |
4404 | ||
4405 | if (ata_id_has_flush_ext(dev->id)) | |
4406 | cmd = ATA_CMD_FLUSH_EXT; | |
4407 | else | |
4408 | cmd = ATA_CMD_FLUSH; | |
4409 | ||
4410 | return ata_do_simple_cmd(ap, dev, cmd); | |
4411 | } | |
4412 | ||
4413 | static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev) | |
4414 | { | |
4415 | return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1); | |
4416 | } | |
4417 | ||
4418 | static int ata_start_drive(struct ata_port *ap, struct ata_device *dev) | |
4419 | { | |
4420 | return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE); | |
4421 | } | |
4422 | ||
4423 | /** | |
4424 | * ata_device_resume - wakeup a previously suspended devices | |
c893a3ae RD |
4425 | * @ap: port the device is connected to |
4426 | * @dev: the device to resume | |
9b847548 JA |
4427 | * |
4428 | * Kick the drive back into action, by sending it an idle immediate | |
4429 | * command and making sure its transfer mode matches between drive | |
4430 | * and host. | |
4431 | * | |
4432 | */ | |
4433 | int ata_device_resume(struct ata_port *ap, struct ata_device *dev) | |
4434 | { | |
4435 | if (ap->flags & ATA_FLAG_SUSPENDED) { | |
e82cbdb9 | 4436 | struct ata_device *failed_dev; |
9b847548 | 4437 | ap->flags &= ~ATA_FLAG_SUSPENDED; |
e82cbdb9 TH |
4438 | while (ata_set_mode(ap, &failed_dev)) |
4439 | ata_dev_disable(ap, failed_dev); | |
9b847548 | 4440 | } |
e1211e3f | 4441 | if (!ata_dev_enabled(dev)) |
9b847548 JA |
4442 | return 0; |
4443 | if (dev->class == ATA_DEV_ATA) | |
4444 | ata_start_drive(ap, dev); | |
4445 | ||
4446 | return 0; | |
4447 | } | |
4448 | ||
4449 | /** | |
4450 | * ata_device_suspend - prepare a device for suspend | |
c893a3ae RD |
4451 | * @ap: port the device is connected to |
4452 | * @dev: the device to suspend | |
9b847548 JA |
4453 | * |
4454 | * Flush the cache on the drive, if appropriate, then issue a | |
4455 | * standbynow command. | |
9b847548 | 4456 | */ |
082776e4 | 4457 | int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state) |
9b847548 | 4458 | { |
e1211e3f | 4459 | if (!ata_dev_enabled(dev)) |
9b847548 JA |
4460 | return 0; |
4461 | if (dev->class == ATA_DEV_ATA) | |
4462 | ata_flush_cache(ap, dev); | |
4463 | ||
082776e4 NC |
4464 | if (state.event != PM_EVENT_FREEZE) |
4465 | ata_standby_drive(ap, dev); | |
9b847548 JA |
4466 | ap->flags |= ATA_FLAG_SUSPENDED; |
4467 | return 0; | |
4468 | } | |
4469 | ||
c893a3ae RD |
4470 | /** |
4471 | * ata_port_start - Set port up for dma. | |
4472 | * @ap: Port to initialize | |
4473 | * | |
4474 | * Called just after data structures for each port are | |
4475 | * initialized. Allocates space for PRD table. | |
4476 | * | |
4477 | * May be used as the port_start() entry in ata_port_operations. | |
4478 | * | |
4479 | * LOCKING: | |
4480 | * Inherited from caller. | |
4481 | */ | |
4482 | ||
1da177e4 LT |
4483 | int ata_port_start (struct ata_port *ap) |
4484 | { | |
2f1f610b | 4485 | struct device *dev = ap->dev; |
6037d6bb | 4486 | int rc; |
1da177e4 LT |
4487 | |
4488 | ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); | |
4489 | if (!ap->prd) | |
4490 | return -ENOMEM; | |
4491 | ||
6037d6bb JG |
4492 | rc = ata_pad_alloc(ap, dev); |
4493 | if (rc) { | |
cedc9a47 | 4494 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); |
6037d6bb | 4495 | return rc; |
cedc9a47 JG |
4496 | } |
4497 | ||
1da177e4 LT |
4498 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma); |
4499 | ||
4500 | return 0; | |
4501 | } | |
4502 | ||
0baab86b EF |
4503 | |
4504 | /** | |
4505 | * ata_port_stop - Undo ata_port_start() | |
4506 | * @ap: Port to shut down | |
4507 | * | |
4508 | * Frees the PRD table. | |
4509 | * | |
4510 | * May be used as the port_stop() entry in ata_port_operations. | |
4511 | * | |
4512 | * LOCKING: | |
6f0ef4fa | 4513 | * Inherited from caller. |
0baab86b EF |
4514 | */ |
4515 | ||
1da177e4 LT |
4516 | void ata_port_stop (struct ata_port *ap) |
4517 | { | |
2f1f610b | 4518 | struct device *dev = ap->dev; |
1da177e4 LT |
4519 | |
4520 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); | |
6037d6bb | 4521 | ata_pad_free(ap, dev); |
1da177e4 LT |
4522 | } |
4523 | ||
aa8f0dc6 JG |
4524 | void ata_host_stop (struct ata_host_set *host_set) |
4525 | { | |
4526 | if (host_set->mmio_base) | |
4527 | iounmap(host_set->mmio_base); | |
4528 | } | |
4529 | ||
4530 | ||
1da177e4 LT |
4531 | /** |
4532 | * ata_host_remove - Unregister SCSI host structure with upper layers | |
4533 | * @ap: Port to unregister | |
4534 | * @do_unregister: 1 if we fully unregister, 0 to just stop the port | |
4535 | * | |
4536 | * LOCKING: | |
6f0ef4fa | 4537 | * Inherited from caller. |
1da177e4 LT |
4538 | */ |
4539 | ||
4540 | static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) | |
4541 | { | |
4542 | struct Scsi_Host *sh = ap->host; | |
4543 | ||
4544 | DPRINTK("ENTER\n"); | |
4545 | ||
4546 | if (do_unregister) | |
4547 | scsi_remove_host(sh); | |
4548 | ||
4549 | ap->ops->port_stop(ap); | |
4550 | } | |
4551 | ||
4552 | /** | |
4553 | * ata_host_init - Initialize an ata_port structure | |
4554 | * @ap: Structure to initialize | |
4555 | * @host: associated SCSI mid-layer structure | |
4556 | * @host_set: Collection of hosts to which @ap belongs | |
4557 | * @ent: Probe information provided by low-level driver | |
4558 | * @port_no: Port number associated with this ata_port | |
4559 | * | |
0cba632b JG |
4560 | * Initialize a new ata_port structure, and its associated |
4561 | * scsi_host. | |
4562 | * | |
1da177e4 | 4563 | * LOCKING: |
0cba632b | 4564 | * Inherited from caller. |
1da177e4 LT |
4565 | */ |
4566 | ||
4567 | static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, | |
4568 | struct ata_host_set *host_set, | |
057ace5e | 4569 | const struct ata_probe_ent *ent, unsigned int port_no) |
1da177e4 LT |
4570 | { |
4571 | unsigned int i; | |
4572 | ||
4573 | host->max_id = 16; | |
4574 | host->max_lun = 1; | |
4575 | host->max_channel = 1; | |
4576 | host->unique_id = ata_unique_id++; | |
4577 | host->max_cmd_len = 12; | |
12413197 | 4578 | |
198e0fed | 4579 | ap->flags = ATA_FLAG_DISABLED; |
1da177e4 LT |
4580 | ap->id = host->unique_id; |
4581 | ap->host = host; | |
4582 | ap->ctl = ATA_DEVCTL_OBS; | |
4583 | ap->host_set = host_set; | |
2f1f610b | 4584 | ap->dev = ent->dev; |
1da177e4 LT |
4585 | ap->port_no = port_no; |
4586 | ap->hard_port_no = | |
4587 | ent->legacy_mode ? ent->hard_port_no : port_no; | |
4588 | ap->pio_mask = ent->pio_mask; | |
4589 | ap->mwdma_mask = ent->mwdma_mask; | |
4590 | ap->udma_mask = ent->udma_mask; | |
4591 | ap->flags |= ent->host_flags; | |
4592 | ap->ops = ent->port_ops; | |
4593 | ap->cbl = ATA_CBL_NONE; | |
1c3fae4d | 4594 | ap->sata_spd_limit = UINT_MAX; |
1da177e4 LT |
4595 | ap->active_tag = ATA_TAG_POISON; |
4596 | ap->last_ctl = 0xFF; | |
4597 | ||
86e45b6b | 4598 | INIT_WORK(&ap->port_task, NULL, NULL); |
a72ec4ce | 4599 | INIT_LIST_HEAD(&ap->eh_done_q); |
1da177e4 | 4600 | |
acf356b1 TH |
4601 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
4602 | struct ata_device *dev = &ap->device[i]; | |
4603 | dev->devno = i; | |
4604 | dev->pio_mask = UINT_MAX; | |
4605 | dev->mwdma_mask = UINT_MAX; | |
4606 | dev->udma_mask = UINT_MAX; | |
4607 | } | |
1da177e4 LT |
4608 | |
4609 | #ifdef ATA_IRQ_TRAP | |
4610 | ap->stats.unhandled_irq = 1; | |
4611 | ap->stats.idle_irq = 1; | |
4612 | #endif | |
4613 | ||
4614 | memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); | |
4615 | } | |
4616 | ||
4617 | /** | |
4618 | * ata_host_add - Attach low-level ATA driver to system | |
4619 | * @ent: Information provided by low-level driver | |
4620 | * @host_set: Collections of ports to which we add | |
4621 | * @port_no: Port number associated with this host | |
4622 | * | |
0cba632b JG |
4623 | * Attach low-level ATA driver to system. |
4624 | * | |
1da177e4 | 4625 | * LOCKING: |
0cba632b | 4626 | * PCI/etc. bus probe sem. |
1da177e4 LT |
4627 | * |
4628 | * RETURNS: | |
0cba632b | 4629 | * New ata_port on success, for NULL on error. |
1da177e4 LT |
4630 | */ |
4631 | ||
057ace5e | 4632 | static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, |
1da177e4 LT |
4633 | struct ata_host_set *host_set, |
4634 | unsigned int port_no) | |
4635 | { | |
4636 | struct Scsi_Host *host; | |
4637 | struct ata_port *ap; | |
4638 | int rc; | |
4639 | ||
4640 | DPRINTK("ENTER\n"); | |
aec5c3c1 TH |
4641 | |
4642 | if (!ent->port_ops->probe_reset && | |
4643 | !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) { | |
4644 | printk(KERN_ERR "ata%u: no reset mechanism available\n", | |
4645 | port_no); | |
4646 | return NULL; | |
4647 | } | |
4648 | ||
1da177e4 LT |
4649 | host = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); |
4650 | if (!host) | |
4651 | return NULL; | |
4652 | ||
30afc84c TH |
4653 | host->transportt = &ata_scsi_transport_template; |
4654 | ||
1da177e4 LT |
4655 | ap = (struct ata_port *) &host->hostdata[0]; |
4656 | ||
4657 | ata_host_init(ap, host, host_set, ent, port_no); | |
4658 | ||
4659 | rc = ap->ops->port_start(ap); | |
4660 | if (rc) | |
4661 | goto err_out; | |
4662 | ||
4663 | return ap; | |
4664 | ||
4665 | err_out: | |
4666 | scsi_host_put(host); | |
4667 | return NULL; | |
4668 | } | |
4669 | ||
4670 | /** | |
0cba632b JG |
4671 | * ata_device_add - Register hardware device with ATA and SCSI layers |
4672 | * @ent: Probe information describing hardware device to be registered | |
4673 | * | |
4674 | * This function processes the information provided in the probe | |
4675 | * information struct @ent, allocates the necessary ATA and SCSI | |
4676 | * host information structures, initializes them, and registers | |
4677 | * everything with requisite kernel subsystems. | |
4678 | * | |
4679 | * This function requests irqs, probes the ATA bus, and probes | |
4680 | * the SCSI bus. | |
1da177e4 LT |
4681 | * |
4682 | * LOCKING: | |
0cba632b | 4683 | * PCI/etc. bus probe sem. |
1da177e4 LT |
4684 | * |
4685 | * RETURNS: | |
0cba632b | 4686 | * Number of ports registered. Zero on error (no ports registered). |
1da177e4 LT |
4687 | */ |
4688 | ||
057ace5e | 4689 | int ata_device_add(const struct ata_probe_ent *ent) |
1da177e4 LT |
4690 | { |
4691 | unsigned int count = 0, i; | |
4692 | struct device *dev = ent->dev; | |
4693 | struct ata_host_set *host_set; | |
4694 | ||
4695 | DPRINTK("ENTER\n"); | |
4696 | /* alloc a container for our list of ATA ports (buses) */ | |
57f3bda8 | 4697 | host_set = kzalloc(sizeof(struct ata_host_set) + |
1da177e4 LT |
4698 | (ent->n_ports * sizeof(void *)), GFP_KERNEL); |
4699 | if (!host_set) | |
4700 | return 0; | |
1da177e4 LT |
4701 | spin_lock_init(&host_set->lock); |
4702 | ||
4703 | host_set->dev = dev; | |
4704 | host_set->n_ports = ent->n_ports; | |
4705 | host_set->irq = ent->irq; | |
4706 | host_set->mmio_base = ent->mmio_base; | |
4707 | host_set->private_data = ent->private_data; | |
4708 | host_set->ops = ent->port_ops; | |
5444a6f4 | 4709 | host_set->flags = ent->host_set_flags; |
1da177e4 LT |
4710 | |
4711 | /* register each port bound to this device */ | |
4712 | for (i = 0; i < ent->n_ports; i++) { | |
4713 | struct ata_port *ap; | |
4714 | unsigned long xfer_mode_mask; | |
4715 | ||
4716 | ap = ata_host_add(ent, host_set, i); | |
4717 | if (!ap) | |
4718 | goto err_out; | |
4719 | ||
4720 | host_set->ports[i] = ap; | |
4721 | xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | | |
4722 | (ap->mwdma_mask << ATA_SHIFT_MWDMA) | | |
4723 | (ap->pio_mask << ATA_SHIFT_PIO); | |
4724 | ||
4725 | /* print per-port info to dmesg */ | |
4726 | printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX " | |
4727 | "bmdma 0x%lX irq %lu\n", | |
4728 | ap->id, | |
4729 | ap->flags & ATA_FLAG_SATA ? 'S' : 'P', | |
4730 | ata_mode_string(xfer_mode_mask), | |
4731 | ap->ioaddr.cmd_addr, | |
4732 | ap->ioaddr.ctl_addr, | |
4733 | ap->ioaddr.bmdma_addr, | |
4734 | ent->irq); | |
4735 | ||
4736 | ata_chk_status(ap); | |
4737 | host_set->ops->irq_clear(ap); | |
4738 | count++; | |
4739 | } | |
4740 | ||
57f3bda8 RD |
4741 | if (!count) |
4742 | goto err_free_ret; | |
1da177e4 LT |
4743 | |
4744 | /* obtain irq, that is shared between channels */ | |
4745 | if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags, | |
4746 | DRV_NAME, host_set)) | |
4747 | goto err_out; | |
4748 | ||
4749 | /* perform each probe synchronously */ | |
4750 | DPRINTK("probe begin\n"); | |
4751 | for (i = 0; i < count; i++) { | |
4752 | struct ata_port *ap; | |
4753 | int rc; | |
4754 | ||
4755 | ap = host_set->ports[i]; | |
4756 | ||
c893a3ae | 4757 | DPRINTK("ata%u: bus probe begin\n", ap->id); |
1da177e4 | 4758 | rc = ata_bus_probe(ap); |
c893a3ae | 4759 | DPRINTK("ata%u: bus probe end\n", ap->id); |
1da177e4 LT |
4760 | |
4761 | if (rc) { | |
4762 | /* FIXME: do something useful here? | |
4763 | * Current libata behavior will | |
4764 | * tear down everything when | |
4765 | * the module is removed | |
4766 | * or the h/w is unplugged. | |
4767 | */ | |
4768 | } | |
4769 | ||
4770 | rc = scsi_add_host(ap->host, dev); | |
4771 | if (rc) { | |
4772 | printk(KERN_ERR "ata%u: scsi_add_host failed\n", | |
4773 | ap->id); | |
4774 | /* FIXME: do something useful here */ | |
4775 | /* FIXME: handle unconditional calls to | |
4776 | * scsi_scan_host and ata_host_remove, below, | |
4777 | * at the very least | |
4778 | */ | |
4779 | } | |
4780 | } | |
4781 | ||
4782 | /* probes are done, now scan each port's disk(s) */ | |
c893a3ae | 4783 | DPRINTK("host probe begin\n"); |
1da177e4 LT |
4784 | for (i = 0; i < count; i++) { |
4785 | struct ata_port *ap = host_set->ports[i]; | |
4786 | ||
644dd0cc | 4787 | ata_scsi_scan_host(ap); |
1da177e4 LT |
4788 | } |
4789 | ||
4790 | dev_set_drvdata(dev, host_set); | |
4791 | ||
4792 | VPRINTK("EXIT, returning %u\n", ent->n_ports); | |
4793 | return ent->n_ports; /* success */ | |
4794 | ||
4795 | err_out: | |
4796 | for (i = 0; i < count; i++) { | |
4797 | ata_host_remove(host_set->ports[i], 1); | |
4798 | scsi_host_put(host_set->ports[i]->host); | |
4799 | } | |
57f3bda8 | 4800 | err_free_ret: |
1da177e4 LT |
4801 | kfree(host_set); |
4802 | VPRINTK("EXIT, returning 0\n"); | |
4803 | return 0; | |
4804 | } | |
4805 | ||
17b14451 AC |
4806 | /** |
4807 | * ata_host_set_remove - PCI layer callback for device removal | |
4808 | * @host_set: ATA host set that was removed | |
4809 | * | |
2e9edbf8 | 4810 | * Unregister all objects associated with this host set. Free those |
17b14451 AC |
4811 | * objects. |
4812 | * | |
4813 | * LOCKING: | |
4814 | * Inherited from calling layer (may sleep). | |
4815 | */ | |
4816 | ||
17b14451 AC |
4817 | void ata_host_set_remove(struct ata_host_set *host_set) |
4818 | { | |
4819 | struct ata_port *ap; | |
4820 | unsigned int i; | |
4821 | ||
4822 | for (i = 0; i < host_set->n_ports; i++) { | |
4823 | ap = host_set->ports[i]; | |
4824 | scsi_remove_host(ap->host); | |
4825 | } | |
4826 | ||
4827 | free_irq(host_set->irq, host_set); | |
4828 | ||
4829 | for (i = 0; i < host_set->n_ports; i++) { | |
4830 | ap = host_set->ports[i]; | |
4831 | ||
4832 | ata_scsi_release(ap->host); | |
4833 | ||
4834 | if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) { | |
4835 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
4836 | ||
4837 | if (ioaddr->cmd_addr == 0x1f0) | |
4838 | release_region(0x1f0, 8); | |
4839 | else if (ioaddr->cmd_addr == 0x170) | |
4840 | release_region(0x170, 8); | |
4841 | } | |
4842 | ||
4843 | scsi_host_put(ap->host); | |
4844 | } | |
4845 | ||
4846 | if (host_set->ops->host_stop) | |
4847 | host_set->ops->host_stop(host_set); | |
4848 | ||
4849 | kfree(host_set); | |
4850 | } | |
4851 | ||
1da177e4 LT |
4852 | /** |
4853 | * ata_scsi_release - SCSI layer callback hook for host unload | |
4854 | * @host: libata host to be unloaded | |
4855 | * | |
4856 | * Performs all duties necessary to shut down a libata port... | |
4857 | * Kill port kthread, disable port, and release resources. | |
4858 | * | |
4859 | * LOCKING: | |
4860 | * Inherited from SCSI layer. | |
4861 | * | |
4862 | * RETURNS: | |
4863 | * One. | |
4864 | */ | |
4865 | ||
4866 | int ata_scsi_release(struct Scsi_Host *host) | |
4867 | { | |
4868 | struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; | |
d9572b1d | 4869 | int i; |
1da177e4 LT |
4870 | |
4871 | DPRINTK("ENTER\n"); | |
4872 | ||
4873 | ap->ops->port_disable(ap); | |
4874 | ata_host_remove(ap, 0); | |
d9572b1d TH |
4875 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
4876 | kfree(ap->device[i].id); | |
1da177e4 LT |
4877 | |
4878 | DPRINTK("EXIT\n"); | |
4879 | return 1; | |
4880 | } | |
4881 | ||
4882 | /** | |
4883 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
4884 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
4885 | * |
4886 | * Utility function which initializes data_addr, error_addr, | |
4887 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
4888 | * device_addr, status_addr, and command_addr to standard offsets | |
4889 | * relative to cmd_addr. | |
4890 | * | |
4891 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 4892 | */ |
0baab86b | 4893 | |
1da177e4 LT |
4894 | void ata_std_ports(struct ata_ioports *ioaddr) |
4895 | { | |
4896 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
4897 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
4898 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
4899 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
4900 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
4901 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
4902 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
4903 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
4904 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
4905 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
4906 | } | |
4907 | ||
0baab86b | 4908 | |
374b1873 JG |
4909 | #ifdef CONFIG_PCI |
4910 | ||
4911 | void ata_pci_host_stop (struct ata_host_set *host_set) | |
4912 | { | |
4913 | struct pci_dev *pdev = to_pci_dev(host_set->dev); | |
4914 | ||
4915 | pci_iounmap(pdev, host_set->mmio_base); | |
4916 | } | |
4917 | ||
1da177e4 LT |
4918 | /** |
4919 | * ata_pci_remove_one - PCI layer callback for device removal | |
4920 | * @pdev: PCI device that was removed | |
4921 | * | |
4922 | * PCI layer indicates to libata via this hook that | |
6f0ef4fa | 4923 | * hot-unplug or module unload event has occurred. |
1da177e4 LT |
4924 | * Handle this by unregistering all objects associated |
4925 | * with this PCI device. Free those objects. Then finally | |
4926 | * release PCI resources and disable device. | |
4927 | * | |
4928 | * LOCKING: | |
4929 | * Inherited from PCI layer (may sleep). | |
4930 | */ | |
4931 | ||
4932 | void ata_pci_remove_one (struct pci_dev *pdev) | |
4933 | { | |
4934 | struct device *dev = pci_dev_to_dev(pdev); | |
4935 | struct ata_host_set *host_set = dev_get_drvdata(dev); | |
1da177e4 | 4936 | |
17b14451 | 4937 | ata_host_set_remove(host_set); |
1da177e4 LT |
4938 | pci_release_regions(pdev); |
4939 | pci_disable_device(pdev); | |
4940 | dev_set_drvdata(dev, NULL); | |
4941 | } | |
4942 | ||
4943 | /* move to PCI subsystem */ | |
057ace5e | 4944 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
4945 | { |
4946 | unsigned long tmp = 0; | |
4947 | ||
4948 | switch (bits->width) { | |
4949 | case 1: { | |
4950 | u8 tmp8 = 0; | |
4951 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
4952 | tmp = tmp8; | |
4953 | break; | |
4954 | } | |
4955 | case 2: { | |
4956 | u16 tmp16 = 0; | |
4957 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
4958 | tmp = tmp16; | |
4959 | break; | |
4960 | } | |
4961 | case 4: { | |
4962 | u32 tmp32 = 0; | |
4963 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
4964 | tmp = tmp32; | |
4965 | break; | |
4966 | } | |
4967 | ||
4968 | default: | |
4969 | return -EINVAL; | |
4970 | } | |
4971 | ||
4972 | tmp &= bits->mask; | |
4973 | ||
4974 | return (tmp == bits->val) ? 1 : 0; | |
4975 | } | |
9b847548 JA |
4976 | |
4977 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state) | |
4978 | { | |
4979 | pci_save_state(pdev); | |
4980 | pci_disable_device(pdev); | |
4981 | pci_set_power_state(pdev, PCI_D3hot); | |
4982 | return 0; | |
4983 | } | |
4984 | ||
4985 | int ata_pci_device_resume(struct pci_dev *pdev) | |
4986 | { | |
4987 | pci_set_power_state(pdev, PCI_D0); | |
4988 | pci_restore_state(pdev); | |
4989 | pci_enable_device(pdev); | |
4990 | pci_set_master(pdev); | |
4991 | return 0; | |
4992 | } | |
1da177e4 LT |
4993 | #endif /* CONFIG_PCI */ |
4994 | ||
4995 | ||
1da177e4 LT |
4996 | static int __init ata_init(void) |
4997 | { | |
4998 | ata_wq = create_workqueue("ata"); | |
4999 | if (!ata_wq) | |
5000 | return -ENOMEM; | |
5001 | ||
5002 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); | |
5003 | return 0; | |
5004 | } | |
5005 | ||
5006 | static void __exit ata_exit(void) | |
5007 | { | |
5008 | destroy_workqueue(ata_wq); | |
5009 | } | |
5010 | ||
5011 | module_init(ata_init); | |
5012 | module_exit(ata_exit); | |
5013 | ||
67846b30 JG |
5014 | static unsigned long ratelimit_time; |
5015 | static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED; | |
5016 | ||
5017 | int ata_ratelimit(void) | |
5018 | { | |
5019 | int rc; | |
5020 | unsigned long flags; | |
5021 | ||
5022 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
5023 | ||
5024 | if (time_after(jiffies, ratelimit_time)) { | |
5025 | rc = 1; | |
5026 | ratelimit_time = jiffies + (HZ/5); | |
5027 | } else | |
5028 | rc = 0; | |
5029 | ||
5030 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
5031 | ||
5032 | return rc; | |
5033 | } | |
5034 | ||
1da177e4 LT |
5035 | /* |
5036 | * libata is essentially a library of internal helper functions for | |
5037 | * low-level ATA host controller drivers. As such, the API/ABI is | |
5038 | * likely to change as new drivers are added and updated. | |
5039 | * Do not depend on ABI/API stability. | |
5040 | */ | |
5041 | ||
5042 | EXPORT_SYMBOL_GPL(ata_std_bios_param); | |
5043 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
5044 | EXPORT_SYMBOL_GPL(ata_device_add); | |
17b14451 | 5045 | EXPORT_SYMBOL_GPL(ata_host_set_remove); |
1da177e4 LT |
5046 | EXPORT_SYMBOL_GPL(ata_sg_init); |
5047 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
76014427 | 5048 | EXPORT_SYMBOL_GPL(__ata_qc_complete); |
1da177e4 | 5049 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
1da177e4 LT |
5050 | EXPORT_SYMBOL_GPL(ata_tf_load); |
5051 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
5052 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
5053 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
5054 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); | |
5055 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
5056 | EXPORT_SYMBOL_GPL(ata_check_status); | |
5057 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
5058 | EXPORT_SYMBOL_GPL(ata_exec_command); |
5059 | EXPORT_SYMBOL_GPL(ata_port_start); | |
5060 | EXPORT_SYMBOL_GPL(ata_port_stop); | |
aa8f0dc6 | 5061 | EXPORT_SYMBOL_GPL(ata_host_stop); |
1da177e4 LT |
5062 | EXPORT_SYMBOL_GPL(ata_interrupt); |
5063 | EXPORT_SYMBOL_GPL(ata_qc_prep); | |
e46834cd | 5064 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
5065 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
5066 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
5067 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
5068 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
5069 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
5070 | EXPORT_SYMBOL_GPL(ata_port_probe); | |
5071 | EXPORT_SYMBOL_GPL(sata_phy_reset); | |
5072 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
5073 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
8a19ac89 | 5074 | EXPORT_SYMBOL_GPL(ata_std_probeinit); |
c2bd5804 TH |
5075 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
5076 | EXPORT_SYMBOL_GPL(sata_std_hardreset); | |
5077 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
5078 | EXPORT_SYMBOL_GPL(ata_std_probe_reset); | |
a62c0fc5 | 5079 | EXPORT_SYMBOL_GPL(ata_drive_probe_reset); |
623a3128 | 5080 | EXPORT_SYMBOL_GPL(ata_dev_revalidate); |
2e9edbf8 JG |
5081 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
5082 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 5083 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 5084 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
6f8b9958 | 5085 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
86e45b6b | 5086 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
1da177e4 LT |
5087 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
5088 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 LT |
5089 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
5090 | EXPORT_SYMBOL_GPL(ata_scsi_release); | |
5091 | EXPORT_SYMBOL_GPL(ata_host_intr); | |
6a62a04d TH |
5092 | EXPORT_SYMBOL_GPL(ata_id_string); |
5093 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
1da177e4 LT |
5094 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
5095 | ||
1bc4ccff | 5096 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
5097 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
5098 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
5099 | ||
1da177e4 LT |
5100 | #ifdef CONFIG_PCI |
5101 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
374b1873 | 5102 | EXPORT_SYMBOL_GPL(ata_pci_host_stop); |
1da177e4 LT |
5103 | EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); |
5104 | EXPORT_SYMBOL_GPL(ata_pci_init_one); | |
5105 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
9b847548 JA |
5106 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
5107 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
67951ade AC |
5108 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
5109 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 5110 | #endif /* CONFIG_PCI */ |
9b847548 JA |
5111 | |
5112 | EXPORT_SYMBOL_GPL(ata_device_suspend); | |
5113 | EXPORT_SYMBOL_GPL(ata_device_resume); | |
5114 | EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); | |
5115 | EXPORT_SYMBOL_GPL(ata_scsi_device_resume); | |
ece1d636 TH |
5116 | |
5117 | EXPORT_SYMBOL_GPL(ata_scsi_error); | |
5118 | EXPORT_SYMBOL_GPL(ata_eng_timeout); | |
5119 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); | |
5120 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); |