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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); | |
cf176e1a TH |
68 | static int ata_down_xfermask_limit(struct ata_port *ap, struct ata_device *dev, |
69 | int force_pio0); | |
1c3fae4d | 70 | static int ata_down_sata_spd_limit(struct ata_port *ap); |
e82cbdb9 | 71 | static int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); |
83206a29 TH |
72 | static unsigned int ata_dev_set_xfermode(struct ata_port *ap, |
73 | struct ata_device *dev); | |
acf356b1 | 74 | static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev); |
1da177e4 LT |
75 | |
76 | static unsigned int ata_unique_id = 1; | |
77 | static struct workqueue_struct *ata_wq; | |
78 | ||
418dc1f5 | 79 | int atapi_enabled = 1; |
1623c81e JG |
80 | module_param(atapi_enabled, int, 0444); |
81 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
82 | ||
c3c013a2 JG |
83 | int libata_fua = 0; |
84 | module_param_named(fua, libata_fua, int, 0444); | |
85 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
86 | ||
1da177e4 LT |
87 | MODULE_AUTHOR("Jeff Garzik"); |
88 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
89 | MODULE_LICENSE("GPL"); | |
90 | MODULE_VERSION(DRV_VERSION); | |
91 | ||
0baab86b | 92 | |
1da177e4 LT |
93 | /** |
94 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
95 | * @tf: Taskfile to convert | |
96 | * @fis: Buffer into which data will output | |
97 | * @pmp: Port multiplier port | |
98 | * | |
99 | * Converts a standard ATA taskfile to a Serial ATA | |
100 | * FIS structure (Register - Host to Device). | |
101 | * | |
102 | * LOCKING: | |
103 | * Inherited from caller. | |
104 | */ | |
105 | ||
057ace5e | 106 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp) |
1da177e4 LT |
107 | { |
108 | fis[0] = 0x27; /* Register - Host to Device FIS */ | |
109 | fis[1] = (pmp & 0xf) | (1 << 7); /* Port multiplier number, | |
110 | bit 7 indicates Command FIS */ | |
111 | fis[2] = tf->command; | |
112 | fis[3] = tf->feature; | |
113 | ||
114 | fis[4] = tf->lbal; | |
115 | fis[5] = tf->lbam; | |
116 | fis[6] = tf->lbah; | |
117 | fis[7] = tf->device; | |
118 | ||
119 | fis[8] = tf->hob_lbal; | |
120 | fis[9] = tf->hob_lbam; | |
121 | fis[10] = tf->hob_lbah; | |
122 | fis[11] = tf->hob_feature; | |
123 | ||
124 | fis[12] = tf->nsect; | |
125 | fis[13] = tf->hob_nsect; | |
126 | fis[14] = 0; | |
127 | fis[15] = tf->ctl; | |
128 | ||
129 | fis[16] = 0; | |
130 | fis[17] = 0; | |
131 | fis[18] = 0; | |
132 | fis[19] = 0; | |
133 | } | |
134 | ||
135 | /** | |
136 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
137 | * @fis: Buffer from which data will be input | |
138 | * @tf: Taskfile to output | |
139 | * | |
e12a1be6 | 140 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
141 | * |
142 | * LOCKING: | |
143 | * Inherited from caller. | |
144 | */ | |
145 | ||
057ace5e | 146 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
147 | { |
148 | tf->command = fis[2]; /* status */ | |
149 | tf->feature = fis[3]; /* error */ | |
150 | ||
151 | tf->lbal = fis[4]; | |
152 | tf->lbam = fis[5]; | |
153 | tf->lbah = fis[6]; | |
154 | tf->device = fis[7]; | |
155 | ||
156 | tf->hob_lbal = fis[8]; | |
157 | tf->hob_lbam = fis[9]; | |
158 | tf->hob_lbah = fis[10]; | |
159 | ||
160 | tf->nsect = fis[12]; | |
161 | tf->hob_nsect = fis[13]; | |
162 | } | |
163 | ||
8cbd6df1 AL |
164 | static const u8 ata_rw_cmds[] = { |
165 | /* pio multi */ | |
166 | ATA_CMD_READ_MULTI, | |
167 | ATA_CMD_WRITE_MULTI, | |
168 | ATA_CMD_READ_MULTI_EXT, | |
169 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
170 | 0, |
171 | 0, | |
172 | 0, | |
173 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
174 | /* pio */ |
175 | ATA_CMD_PIO_READ, | |
176 | ATA_CMD_PIO_WRITE, | |
177 | ATA_CMD_PIO_READ_EXT, | |
178 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
179 | 0, |
180 | 0, | |
181 | 0, | |
182 | 0, | |
8cbd6df1 AL |
183 | /* dma */ |
184 | ATA_CMD_READ, | |
185 | ATA_CMD_WRITE, | |
186 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
187 | ATA_CMD_WRITE_EXT, |
188 | 0, | |
189 | 0, | |
190 | 0, | |
191 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 192 | }; |
1da177e4 LT |
193 | |
194 | /** | |
8cbd6df1 AL |
195 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
196 | * @qc: command to examine and configure | |
1da177e4 | 197 | * |
2e9edbf8 | 198 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 199 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
200 | * |
201 | * LOCKING: | |
202 | * caller. | |
203 | */ | |
9a3dccc4 | 204 | int ata_rwcmd_protocol(struct ata_queued_cmd *qc) |
1da177e4 | 205 | { |
8cbd6df1 AL |
206 | struct ata_taskfile *tf = &qc->tf; |
207 | struct ata_device *dev = qc->dev; | |
9a3dccc4 | 208 | u8 cmd; |
1da177e4 | 209 | |
9a3dccc4 | 210 | int index, fua, lba48, write; |
2e9edbf8 | 211 | |
9a3dccc4 | 212 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
213 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
214 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 215 | |
8cbd6df1 AL |
216 | if (dev->flags & ATA_DFLAG_PIO) { |
217 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 218 | index = dev->multi_count ? 0 : 8; |
8d238e01 AC |
219 | } else if (lba48 && (qc->ap->flags & ATA_FLAG_PIO_LBA48)) { |
220 | /* Unable to use DMA due to host limitation */ | |
221 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 222 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
223 | } else { |
224 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 225 | index = 16; |
8cbd6df1 | 226 | } |
1da177e4 | 227 | |
9a3dccc4 TH |
228 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
229 | if (cmd) { | |
230 | tf->command = cmd; | |
231 | return 0; | |
232 | } | |
233 | return -1; | |
1da177e4 LT |
234 | } |
235 | ||
cb95d562 TH |
236 | /** |
237 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
238 | * @pio_mask: pio_mask | |
239 | * @mwdma_mask: mwdma_mask | |
240 | * @udma_mask: udma_mask | |
241 | * | |
242 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
243 | * unsigned int xfer_mask. | |
244 | * | |
245 | * LOCKING: | |
246 | * None. | |
247 | * | |
248 | * RETURNS: | |
249 | * Packed xfer_mask. | |
250 | */ | |
251 | static unsigned int ata_pack_xfermask(unsigned int pio_mask, | |
252 | unsigned int mwdma_mask, | |
253 | unsigned int udma_mask) | |
254 | { | |
255 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
256 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
257 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
258 | } | |
259 | ||
c0489e4e TH |
260 | /** |
261 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
262 | * @xfer_mask: xfer_mask to unpack | |
263 | * @pio_mask: resulting pio_mask | |
264 | * @mwdma_mask: resulting mwdma_mask | |
265 | * @udma_mask: resulting udma_mask | |
266 | * | |
267 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
268 | * Any NULL distination masks will be ignored. | |
269 | */ | |
270 | static void ata_unpack_xfermask(unsigned int xfer_mask, | |
271 | unsigned int *pio_mask, | |
272 | unsigned int *mwdma_mask, | |
273 | unsigned int *udma_mask) | |
274 | { | |
275 | if (pio_mask) | |
276 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
277 | if (mwdma_mask) | |
278 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
279 | if (udma_mask) | |
280 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
281 | } | |
282 | ||
cb95d562 | 283 | static const struct ata_xfer_ent { |
be9a50c8 | 284 | int shift, bits; |
cb95d562 TH |
285 | u8 base; |
286 | } ata_xfer_tbl[] = { | |
287 | { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 }, | |
288 | { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 }, | |
289 | { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 }, | |
290 | { -1, }, | |
291 | }; | |
292 | ||
293 | /** | |
294 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
295 | * @xfer_mask: xfer_mask of interest | |
296 | * | |
297 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
298 | * bit of @xfer_mask is considered. | |
299 | * | |
300 | * LOCKING: | |
301 | * None. | |
302 | * | |
303 | * RETURNS: | |
304 | * Matching XFER_* value, 0 if no match found. | |
305 | */ | |
306 | static u8 ata_xfer_mask2mode(unsigned int xfer_mask) | |
307 | { | |
308 | int highbit = fls(xfer_mask) - 1; | |
309 | const struct ata_xfer_ent *ent; | |
310 | ||
311 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
312 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
313 | return ent->base + highbit - ent->shift; | |
314 | return 0; | |
315 | } | |
316 | ||
317 | /** | |
318 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
319 | * @xfer_mode: XFER_* of interest | |
320 | * | |
321 | * Return matching xfer_mask for @xfer_mode. | |
322 | * | |
323 | * LOCKING: | |
324 | * None. | |
325 | * | |
326 | * RETURNS: | |
327 | * Matching xfer_mask, 0 if no match found. | |
328 | */ | |
329 | static unsigned int ata_xfer_mode2mask(u8 xfer_mode) | |
330 | { | |
331 | const struct ata_xfer_ent *ent; | |
332 | ||
333 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
334 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
335 | return 1 << (ent->shift + xfer_mode - ent->base); | |
336 | return 0; | |
337 | } | |
338 | ||
339 | /** | |
340 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
341 | * @xfer_mode: XFER_* of interest | |
342 | * | |
343 | * Return matching xfer_shift for @xfer_mode. | |
344 | * | |
345 | * LOCKING: | |
346 | * None. | |
347 | * | |
348 | * RETURNS: | |
349 | * Matching xfer_shift, -1 if no match found. | |
350 | */ | |
351 | static int ata_xfer_mode2shift(unsigned int xfer_mode) | |
352 | { | |
353 | const struct ata_xfer_ent *ent; | |
354 | ||
355 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
356 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
357 | return ent->shift; | |
358 | return -1; | |
359 | } | |
360 | ||
1da177e4 | 361 | /** |
1da7b0d0 TH |
362 | * ata_mode_string - convert xfer_mask to string |
363 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
364 | * |
365 | * Determine string which represents the highest speed | |
1da7b0d0 | 366 | * (highest bit in @modemask). |
1da177e4 LT |
367 | * |
368 | * LOCKING: | |
369 | * None. | |
370 | * | |
371 | * RETURNS: | |
372 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 373 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 374 | */ |
1da7b0d0 | 375 | static const char *ata_mode_string(unsigned int xfer_mask) |
1da177e4 | 376 | { |
75f554bc TH |
377 | static const char * const xfer_mode_str[] = { |
378 | "PIO0", | |
379 | "PIO1", | |
380 | "PIO2", | |
381 | "PIO3", | |
382 | "PIO4", | |
383 | "MWDMA0", | |
384 | "MWDMA1", | |
385 | "MWDMA2", | |
386 | "UDMA/16", | |
387 | "UDMA/25", | |
388 | "UDMA/33", | |
389 | "UDMA/44", | |
390 | "UDMA/66", | |
391 | "UDMA/100", | |
392 | "UDMA/133", | |
393 | "UDMA7", | |
394 | }; | |
1da7b0d0 | 395 | int highbit; |
1da177e4 | 396 | |
1da7b0d0 TH |
397 | highbit = fls(xfer_mask) - 1; |
398 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
399 | return xfer_mode_str[highbit]; | |
1da177e4 | 400 | return "<n/a>"; |
1da177e4 LT |
401 | } |
402 | ||
4c360c81 TH |
403 | static const char *sata_spd_string(unsigned int spd) |
404 | { | |
405 | static const char * const spd_str[] = { | |
406 | "1.5 Gbps", | |
407 | "3.0 Gbps", | |
408 | }; | |
409 | ||
410 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
411 | return "<unknown>"; | |
412 | return spd_str[spd - 1]; | |
413 | } | |
414 | ||
0b8efb0a TH |
415 | static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev) |
416 | { | |
e1211e3f | 417 | if (ata_dev_enabled(dev)) { |
0b8efb0a TH |
418 | printk(KERN_WARNING "ata%u: dev %u disabled\n", |
419 | ap->id, dev->devno); | |
420 | dev->class++; | |
421 | } | |
422 | } | |
423 | ||
1da177e4 LT |
424 | /** |
425 | * ata_pio_devchk - PATA device presence detection | |
426 | * @ap: ATA channel to examine | |
427 | * @device: Device to examine (starting at zero) | |
428 | * | |
429 | * This technique was originally described in | |
430 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
431 | * later found its way into the ATA/ATAPI spec. | |
432 | * | |
433 | * Write a pattern to the ATA shadow registers, | |
434 | * and if a device is present, it will respond by | |
435 | * correctly storing and echoing back the | |
436 | * ATA shadow register contents. | |
437 | * | |
438 | * LOCKING: | |
439 | * caller. | |
440 | */ | |
441 | ||
442 | static unsigned int ata_pio_devchk(struct ata_port *ap, | |
443 | unsigned int device) | |
444 | { | |
445 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
446 | u8 nsect, lbal; | |
447 | ||
448 | ap->ops->dev_select(ap, device); | |
449 | ||
450 | outb(0x55, ioaddr->nsect_addr); | |
451 | outb(0xaa, ioaddr->lbal_addr); | |
452 | ||
453 | outb(0xaa, ioaddr->nsect_addr); | |
454 | outb(0x55, ioaddr->lbal_addr); | |
455 | ||
456 | outb(0x55, ioaddr->nsect_addr); | |
457 | outb(0xaa, ioaddr->lbal_addr); | |
458 | ||
459 | nsect = inb(ioaddr->nsect_addr); | |
460 | lbal = inb(ioaddr->lbal_addr); | |
461 | ||
462 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
463 | return 1; /* we found a device */ | |
464 | ||
465 | return 0; /* nothing found */ | |
466 | } | |
467 | ||
468 | /** | |
469 | * ata_mmio_devchk - PATA device presence detection | |
470 | * @ap: ATA channel to examine | |
471 | * @device: Device to examine (starting at zero) | |
472 | * | |
473 | * This technique was originally described in | |
474 | * Hale Landis's ATADRVR (www.ata-atapi.com), and | |
475 | * later found its way into the ATA/ATAPI spec. | |
476 | * | |
477 | * Write a pattern to the ATA shadow registers, | |
478 | * and if a device is present, it will respond by | |
479 | * correctly storing and echoing back the | |
480 | * ATA shadow register contents. | |
481 | * | |
482 | * LOCKING: | |
483 | * caller. | |
484 | */ | |
485 | ||
486 | static unsigned int ata_mmio_devchk(struct ata_port *ap, | |
487 | unsigned int device) | |
488 | { | |
489 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
490 | u8 nsect, lbal; | |
491 | ||
492 | ap->ops->dev_select(ap, device); | |
493 | ||
494 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
495 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
496 | ||
497 | writeb(0xaa, (void __iomem *) ioaddr->nsect_addr); | |
498 | writeb(0x55, (void __iomem *) ioaddr->lbal_addr); | |
499 | ||
500 | writeb(0x55, (void __iomem *) ioaddr->nsect_addr); | |
501 | writeb(0xaa, (void __iomem *) ioaddr->lbal_addr); | |
502 | ||
503 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
504 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
505 | ||
506 | if ((nsect == 0x55) && (lbal == 0xaa)) | |
507 | return 1; /* we found a device */ | |
508 | ||
509 | return 0; /* nothing found */ | |
510 | } | |
511 | ||
512 | /** | |
513 | * ata_devchk - PATA device presence detection | |
514 | * @ap: ATA channel to examine | |
515 | * @device: Device to examine (starting at zero) | |
516 | * | |
517 | * Dispatch ATA device presence detection, depending | |
518 | * on whether we are using PIO or MMIO to talk to the | |
519 | * ATA shadow registers. | |
520 | * | |
521 | * LOCKING: | |
522 | * caller. | |
523 | */ | |
524 | ||
525 | static unsigned int ata_devchk(struct ata_port *ap, | |
526 | unsigned int device) | |
527 | { | |
528 | if (ap->flags & ATA_FLAG_MMIO) | |
529 | return ata_mmio_devchk(ap, device); | |
530 | return ata_pio_devchk(ap, device); | |
531 | } | |
532 | ||
533 | /** | |
534 | * ata_dev_classify - determine device type based on ATA-spec signature | |
535 | * @tf: ATA taskfile register set for device to be identified | |
536 | * | |
537 | * Determine from taskfile register contents whether a device is | |
538 | * ATA or ATAPI, as per "Signature and persistence" section | |
539 | * of ATA/PI spec (volume 1, sect 5.14). | |
540 | * | |
541 | * LOCKING: | |
542 | * None. | |
543 | * | |
544 | * RETURNS: | |
545 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN | |
546 | * the event of failure. | |
547 | */ | |
548 | ||
057ace5e | 549 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
550 | { |
551 | /* Apple's open source Darwin code hints that some devices only | |
552 | * put a proper signature into the LBA mid/high registers, | |
553 | * So, we only check those. It's sufficient for uniqueness. | |
554 | */ | |
555 | ||
556 | if (((tf->lbam == 0) && (tf->lbah == 0)) || | |
557 | ((tf->lbam == 0x3c) && (tf->lbah == 0xc3))) { | |
558 | DPRINTK("found ATA device by sig\n"); | |
559 | return ATA_DEV_ATA; | |
560 | } | |
561 | ||
562 | if (((tf->lbam == 0x14) && (tf->lbah == 0xeb)) || | |
563 | ((tf->lbam == 0x69) && (tf->lbah == 0x96))) { | |
564 | DPRINTK("found ATAPI device by sig\n"); | |
565 | return ATA_DEV_ATAPI; | |
566 | } | |
567 | ||
568 | DPRINTK("unknown device\n"); | |
569 | return ATA_DEV_UNKNOWN; | |
570 | } | |
571 | ||
572 | /** | |
573 | * ata_dev_try_classify - Parse returned ATA device signature | |
574 | * @ap: ATA channel to examine | |
575 | * @device: Device to examine (starting at zero) | |
b4dc7623 | 576 | * @r_err: Value of error register on completion |
1da177e4 LT |
577 | * |
578 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, | |
579 | * an ATA/ATAPI-defined set of values is placed in the ATA | |
580 | * shadow registers, indicating the results of device detection | |
581 | * and diagnostics. | |
582 | * | |
583 | * Select the ATA device, and read the values from the ATA shadow | |
584 | * registers. Then parse according to the Error register value, | |
585 | * and the spec-defined values examined by ata_dev_classify(). | |
586 | * | |
587 | * LOCKING: | |
588 | * caller. | |
b4dc7623 TH |
589 | * |
590 | * RETURNS: | |
591 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. | |
1da177e4 LT |
592 | */ |
593 | ||
b4dc7623 TH |
594 | static unsigned int |
595 | ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err) | |
1da177e4 | 596 | { |
1da177e4 LT |
597 | struct ata_taskfile tf; |
598 | unsigned int class; | |
599 | u8 err; | |
600 | ||
601 | ap->ops->dev_select(ap, device); | |
602 | ||
603 | memset(&tf, 0, sizeof(tf)); | |
604 | ||
1da177e4 | 605 | ap->ops->tf_read(ap, &tf); |
0169e284 | 606 | err = tf.feature; |
b4dc7623 TH |
607 | if (r_err) |
608 | *r_err = err; | |
1da177e4 LT |
609 | |
610 | /* see if device passed diags */ | |
611 | if (err == 1) | |
612 | /* do nothing */ ; | |
613 | else if ((device == 0) && (err == 0x81)) | |
614 | /* do nothing */ ; | |
615 | else | |
b4dc7623 | 616 | return ATA_DEV_NONE; |
1da177e4 | 617 | |
b4dc7623 | 618 | /* determine if device is ATA or ATAPI */ |
1da177e4 | 619 | class = ata_dev_classify(&tf); |
b4dc7623 | 620 | |
1da177e4 | 621 | if (class == ATA_DEV_UNKNOWN) |
b4dc7623 | 622 | return ATA_DEV_NONE; |
1da177e4 | 623 | if ((class == ATA_DEV_ATA) && (ata_chk_status(ap) == 0)) |
b4dc7623 TH |
624 | return ATA_DEV_NONE; |
625 | return class; | |
1da177e4 LT |
626 | } |
627 | ||
628 | /** | |
6a62a04d | 629 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
630 | * @id: IDENTIFY DEVICE results we will examine |
631 | * @s: string into which data is output | |
632 | * @ofs: offset into identify device page | |
633 | * @len: length of string to return. must be an even number. | |
634 | * | |
635 | * The strings in the IDENTIFY DEVICE page are broken up into | |
636 | * 16-bit chunks. Run through the string, and output each | |
637 | * 8-bit chunk linearly, regardless of platform. | |
638 | * | |
639 | * LOCKING: | |
640 | * caller. | |
641 | */ | |
642 | ||
6a62a04d TH |
643 | void ata_id_string(const u16 *id, unsigned char *s, |
644 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
645 | { |
646 | unsigned int c; | |
647 | ||
648 | while (len > 0) { | |
649 | c = id[ofs] >> 8; | |
650 | *s = c; | |
651 | s++; | |
652 | ||
653 | c = id[ofs] & 0xff; | |
654 | *s = c; | |
655 | s++; | |
656 | ||
657 | ofs++; | |
658 | len -= 2; | |
659 | } | |
660 | } | |
661 | ||
0e949ff3 | 662 | /** |
6a62a04d | 663 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
664 | * @id: IDENTIFY DEVICE results we will examine |
665 | * @s: string into which data is output | |
666 | * @ofs: offset into identify device page | |
667 | * @len: length of string to return. must be an odd number. | |
668 | * | |
6a62a04d | 669 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
670 | * trims trailing spaces and terminates the resulting string with |
671 | * null. @len must be actual maximum length (even number) + 1. | |
672 | * | |
673 | * LOCKING: | |
674 | * caller. | |
675 | */ | |
6a62a04d TH |
676 | void ata_id_c_string(const u16 *id, unsigned char *s, |
677 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
678 | { |
679 | unsigned char *p; | |
680 | ||
681 | WARN_ON(!(len & 1)); | |
682 | ||
6a62a04d | 683 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
684 | |
685 | p = s + strnlen(s, len - 1); | |
686 | while (p > s && p[-1] == ' ') | |
687 | p--; | |
688 | *p = '\0'; | |
689 | } | |
0baab86b | 690 | |
2940740b TH |
691 | static u64 ata_id_n_sectors(const u16 *id) |
692 | { | |
693 | if (ata_id_has_lba(id)) { | |
694 | if (ata_id_has_lba48(id)) | |
695 | return ata_id_u64(id, 100); | |
696 | else | |
697 | return ata_id_u32(id, 60); | |
698 | } else { | |
699 | if (ata_id_current_chs_valid(id)) | |
700 | return ata_id_u32(id, 57); | |
701 | else | |
702 | return id[1] * id[3] * id[6]; | |
703 | } | |
704 | } | |
705 | ||
0baab86b EF |
706 | /** |
707 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
708 | * @ap: ATA channel to manipulate | |
709 | * @device: ATA device (numbered from zero) to select | |
710 | * | |
711 | * This function performs no actual function. | |
712 | * | |
713 | * May be used as the dev_select() entry in ata_port_operations. | |
714 | * | |
715 | * LOCKING: | |
716 | * caller. | |
717 | */ | |
1da177e4 LT |
718 | void ata_noop_dev_select (struct ata_port *ap, unsigned int device) |
719 | { | |
720 | } | |
721 | ||
0baab86b | 722 | |
1da177e4 LT |
723 | /** |
724 | * ata_std_dev_select - Select device 0/1 on ATA bus | |
725 | * @ap: ATA channel to manipulate | |
726 | * @device: ATA device (numbered from zero) to select | |
727 | * | |
728 | * Use the method defined in the ATA specification to | |
729 | * make either device 0, or device 1, active on the | |
0baab86b EF |
730 | * ATA channel. Works with both PIO and MMIO. |
731 | * | |
732 | * May be used as the dev_select() entry in ata_port_operations. | |
1da177e4 LT |
733 | * |
734 | * LOCKING: | |
735 | * caller. | |
736 | */ | |
737 | ||
738 | void ata_std_dev_select (struct ata_port *ap, unsigned int device) | |
739 | { | |
740 | u8 tmp; | |
741 | ||
742 | if (device == 0) | |
743 | tmp = ATA_DEVICE_OBS; | |
744 | else | |
745 | tmp = ATA_DEVICE_OBS | ATA_DEV1; | |
746 | ||
747 | if (ap->flags & ATA_FLAG_MMIO) { | |
748 | writeb(tmp, (void __iomem *) ap->ioaddr.device_addr); | |
749 | } else { | |
750 | outb(tmp, ap->ioaddr.device_addr); | |
751 | } | |
752 | ata_pause(ap); /* needed; also flushes, for mmio */ | |
753 | } | |
754 | ||
755 | /** | |
756 | * ata_dev_select - Select device 0/1 on ATA bus | |
757 | * @ap: ATA channel to manipulate | |
758 | * @device: ATA device (numbered from zero) to select | |
759 | * @wait: non-zero to wait for Status register BSY bit to clear | |
760 | * @can_sleep: non-zero if context allows sleeping | |
761 | * | |
762 | * Use the method defined in the ATA specification to | |
763 | * make either device 0, or device 1, active on the | |
764 | * ATA channel. | |
765 | * | |
766 | * This is a high-level version of ata_std_dev_select(), | |
767 | * which additionally provides the services of inserting | |
768 | * the proper pauses and status polling, where needed. | |
769 | * | |
770 | * LOCKING: | |
771 | * caller. | |
772 | */ | |
773 | ||
774 | void ata_dev_select(struct ata_port *ap, unsigned int device, | |
775 | unsigned int wait, unsigned int can_sleep) | |
776 | { | |
777 | VPRINTK("ENTER, ata%u: device %u, wait %u\n", | |
778 | ap->id, device, wait); | |
779 | ||
780 | if (wait) | |
781 | ata_wait_idle(ap); | |
782 | ||
783 | ap->ops->dev_select(ap, device); | |
784 | ||
785 | if (wait) { | |
786 | if (can_sleep && ap->device[device].class == ATA_DEV_ATAPI) | |
787 | msleep(150); | |
788 | ata_wait_idle(ap); | |
789 | } | |
790 | } | |
791 | ||
792 | /** | |
793 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 794 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 795 | * |
0bd3300a TH |
796 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
797 | * page. | |
1da177e4 LT |
798 | * |
799 | * LOCKING: | |
800 | * caller. | |
801 | */ | |
802 | ||
0bd3300a | 803 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
804 | { |
805 | DPRINTK("49==0x%04x " | |
806 | "53==0x%04x " | |
807 | "63==0x%04x " | |
808 | "64==0x%04x " | |
809 | "75==0x%04x \n", | |
0bd3300a TH |
810 | id[49], |
811 | id[53], | |
812 | id[63], | |
813 | id[64], | |
814 | id[75]); | |
1da177e4 LT |
815 | DPRINTK("80==0x%04x " |
816 | "81==0x%04x " | |
817 | "82==0x%04x " | |
818 | "83==0x%04x " | |
819 | "84==0x%04x \n", | |
0bd3300a TH |
820 | id[80], |
821 | id[81], | |
822 | id[82], | |
823 | id[83], | |
824 | id[84]); | |
1da177e4 LT |
825 | DPRINTK("88==0x%04x " |
826 | "93==0x%04x\n", | |
0bd3300a TH |
827 | id[88], |
828 | id[93]); | |
1da177e4 LT |
829 | } |
830 | ||
cb95d562 TH |
831 | /** |
832 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
833 | * @id: IDENTIFY data to compute xfer mask from | |
834 | * | |
835 | * Compute the xfermask for this device. This is not as trivial | |
836 | * as it seems if we must consider early devices correctly. | |
837 | * | |
838 | * FIXME: pre IDE drive timing (do we care ?). | |
839 | * | |
840 | * LOCKING: | |
841 | * None. | |
842 | * | |
843 | * RETURNS: | |
844 | * Computed xfermask | |
845 | */ | |
846 | static unsigned int ata_id_xfermask(const u16 *id) | |
847 | { | |
848 | unsigned int pio_mask, mwdma_mask, udma_mask; | |
849 | ||
850 | /* Usual case. Word 53 indicates word 64 is valid */ | |
851 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
852 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
853 | pio_mask <<= 3; | |
854 | pio_mask |= 0x7; | |
855 | } else { | |
856 | /* If word 64 isn't valid then Word 51 high byte holds | |
857 | * the PIO timing number for the maximum. Turn it into | |
858 | * a mask. | |
859 | */ | |
860 | pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ; | |
861 | ||
862 | /* But wait.. there's more. Design your standards by | |
863 | * committee and you too can get a free iordy field to | |
864 | * process. However its the speeds not the modes that | |
865 | * are supported... Note drivers using the timing API | |
866 | * will get this right anyway | |
867 | */ | |
868 | } | |
869 | ||
870 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 TH |
871 | |
872 | udma_mask = 0; | |
873 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
874 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
875 | |
876 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
877 | } | |
878 | ||
86e45b6b TH |
879 | /** |
880 | * ata_port_queue_task - Queue port_task | |
881 | * @ap: The ata_port to queue port_task for | |
882 | * | |
883 | * Schedule @fn(@data) for execution after @delay jiffies using | |
884 | * port_task. There is one port_task per port and it's the | |
885 | * user(low level driver)'s responsibility to make sure that only | |
886 | * one task is active at any given time. | |
887 | * | |
888 | * libata core layer takes care of synchronization between | |
889 | * port_task and EH. ata_port_queue_task() may be ignored for EH | |
890 | * synchronization. | |
891 | * | |
892 | * LOCKING: | |
893 | * Inherited from caller. | |
894 | */ | |
895 | void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data, | |
896 | unsigned long delay) | |
897 | { | |
898 | int rc; | |
899 | ||
2e755f68 | 900 | if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK) |
86e45b6b TH |
901 | return; |
902 | ||
903 | PREPARE_WORK(&ap->port_task, fn, data); | |
904 | ||
905 | if (!delay) | |
906 | rc = queue_work(ata_wq, &ap->port_task); | |
907 | else | |
908 | rc = queue_delayed_work(ata_wq, &ap->port_task, delay); | |
909 | ||
910 | /* rc == 0 means that another user is using port task */ | |
911 | WARN_ON(rc == 0); | |
912 | } | |
913 | ||
914 | /** | |
915 | * ata_port_flush_task - Flush port_task | |
916 | * @ap: The ata_port to flush port_task for | |
917 | * | |
918 | * After this function completes, port_task is guranteed not to | |
919 | * be running or scheduled. | |
920 | * | |
921 | * LOCKING: | |
922 | * Kernel thread context (may sleep) | |
923 | */ | |
924 | void ata_port_flush_task(struct ata_port *ap) | |
925 | { | |
926 | unsigned long flags; | |
927 | ||
928 | DPRINTK("ENTER\n"); | |
929 | ||
930 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
2e755f68 | 931 | ap->flags |= ATA_FLAG_FLUSH_PORT_TASK; |
86e45b6b TH |
932 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
933 | ||
934 | DPRINTK("flush #1\n"); | |
935 | flush_workqueue(ata_wq); | |
936 | ||
937 | /* | |
938 | * At this point, if a task is running, it's guaranteed to see | |
939 | * the FLUSH flag; thus, it will never queue pio tasks again. | |
940 | * Cancel and flush. | |
941 | */ | |
942 | if (!cancel_delayed_work(&ap->port_task)) { | |
943 | DPRINTK("flush #2\n"); | |
944 | flush_workqueue(ata_wq); | |
945 | } | |
946 | ||
947 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
2e755f68 | 948 | ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK; |
86e45b6b TH |
949 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
950 | ||
951 | DPRINTK("EXIT\n"); | |
952 | } | |
953 | ||
77853bf2 | 954 | void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 955 | { |
77853bf2 | 956 | struct completion *waiting = qc->private_data; |
a2a7a662 | 957 | |
77853bf2 | 958 | qc->ap->ops->tf_read(qc->ap, &qc->tf); |
a2a7a662 | 959 | complete(waiting); |
a2a7a662 TH |
960 | } |
961 | ||
962 | /** | |
963 | * ata_exec_internal - execute libata internal command | |
964 | * @ap: Port to which the command is sent | |
965 | * @dev: Device to which the command is sent | |
966 | * @tf: Taskfile registers for the command and the result | |
967 | * @dma_dir: Data tranfer direction of the command | |
968 | * @buf: Data buffer of the command | |
969 | * @buflen: Length of data buffer | |
970 | * | |
971 | * Executes libata internal command with timeout. @tf contains | |
972 | * command on entry and result on return. Timeout and error | |
973 | * conditions are reported via return value. No recovery action | |
974 | * is taken after a command times out. It's caller's duty to | |
975 | * clean up after timeout. | |
976 | * | |
977 | * LOCKING: | |
978 | * None. Should be called with kernel context, might sleep. | |
979 | */ | |
980 | ||
981 | static unsigned | |
982 | ata_exec_internal(struct ata_port *ap, struct ata_device *dev, | |
983 | struct ata_taskfile *tf, | |
984 | int dma_dir, void *buf, unsigned int buflen) | |
985 | { | |
986 | u8 command = tf->command; | |
987 | struct ata_queued_cmd *qc; | |
988 | DECLARE_COMPLETION(wait); | |
989 | unsigned long flags; | |
77853bf2 | 990 | unsigned int err_mask; |
a2a7a662 TH |
991 | |
992 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
993 | ||
994 | qc = ata_qc_new_init(ap, dev); | |
995 | BUG_ON(qc == NULL); | |
996 | ||
997 | qc->tf = *tf; | |
998 | qc->dma_dir = dma_dir; | |
999 | if (dma_dir != DMA_NONE) { | |
1000 | ata_sg_init_one(qc, buf, buflen); | |
1001 | qc->nsect = buflen / ATA_SECT_SIZE; | |
1002 | } | |
1003 | ||
77853bf2 | 1004 | qc->private_data = &wait; |
a2a7a662 TH |
1005 | qc->complete_fn = ata_qc_complete_internal; |
1006 | ||
8e0e694a | 1007 | ata_qc_issue(qc); |
a2a7a662 TH |
1008 | |
1009 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1010 | ||
1011 | if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) { | |
41ade50c AL |
1012 | ata_port_flush_task(ap); |
1013 | ||
a2a7a662 TH |
1014 | spin_lock_irqsave(&ap->host_set->lock, flags); |
1015 | ||
1016 | /* We're racing with irq here. If we lose, the | |
1017 | * following test prevents us from completing the qc | |
1018 | * again. If completion irq occurs after here but | |
1019 | * before the caller cleans up, it will result in a | |
1020 | * spurious interrupt. We can live with that. | |
1021 | */ | |
77853bf2 | 1022 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
11a56d24 | 1023 | qc->err_mask = AC_ERR_TIMEOUT; |
a2a7a662 TH |
1024 | ata_qc_complete(qc); |
1025 | printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n", | |
1026 | ap->id, command); | |
1027 | } | |
1028 | ||
1029 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
1030 | } | |
1031 | ||
77853bf2 TH |
1032 | *tf = qc->tf; |
1033 | err_mask = qc->err_mask; | |
1034 | ||
1035 | ata_qc_free(qc); | |
1036 | ||
1f7dd3e9 TH |
1037 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1038 | * Until those drivers are fixed, we detect the condition | |
1039 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1040 | * port. | |
1041 | * | |
1042 | * Note that this doesn't change any behavior as internal | |
1043 | * command failure results in disabling the device in the | |
1044 | * higher layer for LLDDs without new reset/EH callbacks. | |
1045 | * | |
1046 | * Kill the following code as soon as those drivers are fixed. | |
1047 | */ | |
1048 | if (ap->flags & ATA_FLAG_PORT_DISABLED) { | |
1049 | err_mask |= AC_ERR_SYSTEM; | |
1050 | ata_port_probe(ap); | |
1051 | } | |
1052 | ||
77853bf2 | 1053 | return err_mask; |
a2a7a662 TH |
1054 | } |
1055 | ||
1bc4ccff AC |
1056 | /** |
1057 | * ata_pio_need_iordy - check if iordy needed | |
1058 | * @adev: ATA device | |
1059 | * | |
1060 | * Check if the current speed of the device requires IORDY. Used | |
1061 | * by various controllers for chip configuration. | |
1062 | */ | |
1063 | ||
1064 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) | |
1065 | { | |
1066 | int pio; | |
1067 | int speed = adev->pio_mode - XFER_PIO_0; | |
1068 | ||
1069 | if (speed < 2) | |
1070 | return 0; | |
1071 | if (speed > 2) | |
1072 | return 1; | |
2e9edbf8 | 1073 | |
1bc4ccff AC |
1074 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1075 | ||
1076 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ | |
1077 | pio = adev->id[ATA_ID_EIDE_PIO]; | |
1078 | /* Is the speed faster than the drive allows non IORDY ? */ | |
1079 | if (pio) { | |
1080 | /* This is cycle times not frequency - watch the logic! */ | |
1081 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
1082 | return 1; | |
1083 | return 0; | |
1084 | } | |
1085 | } | |
1086 | return 0; | |
1087 | } | |
1088 | ||
1da177e4 | 1089 | /** |
49016aca TH |
1090 | * ata_dev_read_id - Read ID data from the specified device |
1091 | * @ap: port on which target device resides | |
1092 | * @dev: target device | |
1093 | * @p_class: pointer to class of the target device (may be changed) | |
1094 | * @post_reset: is this read ID post-reset? | |
d9572b1d | 1095 | * @p_id: read IDENTIFY page (newly allocated) |
1da177e4 | 1096 | * |
49016aca TH |
1097 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1098 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1099 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1100 | * for pre-ATA4 drives. | |
1da177e4 LT |
1101 | * |
1102 | * LOCKING: | |
49016aca TH |
1103 | * Kernel thread context (may sleep) |
1104 | * | |
1105 | * RETURNS: | |
1106 | * 0 on success, -errno otherwise. | |
1da177e4 | 1107 | */ |
49016aca | 1108 | static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev, |
d9572b1d | 1109 | unsigned int *p_class, int post_reset, u16 **p_id) |
1da177e4 | 1110 | { |
49016aca | 1111 | unsigned int class = *p_class; |
a0123703 | 1112 | struct ata_taskfile tf; |
49016aca | 1113 | unsigned int err_mask = 0; |
d9572b1d | 1114 | u16 *id; |
49016aca TH |
1115 | const char *reason; |
1116 | int rc; | |
1da177e4 | 1117 | |
49016aca | 1118 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 | 1119 | |
49016aca | 1120 | ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */ |
1da177e4 | 1121 | |
d9572b1d TH |
1122 | id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL); |
1123 | if (id == NULL) { | |
1124 | rc = -ENOMEM; | |
1125 | reason = "out of memory"; | |
1126 | goto err_out; | |
1127 | } | |
1128 | ||
49016aca TH |
1129 | retry: |
1130 | ata_tf_init(ap, &tf, dev->devno); | |
a0123703 | 1131 | |
49016aca TH |
1132 | switch (class) { |
1133 | case ATA_DEV_ATA: | |
a0123703 | 1134 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1135 | break; |
1136 | case ATA_DEV_ATAPI: | |
a0123703 | 1137 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1138 | break; |
1139 | default: | |
1140 | rc = -ENODEV; | |
1141 | reason = "unsupported class"; | |
1142 | goto err_out; | |
1da177e4 LT |
1143 | } |
1144 | ||
a0123703 | 1145 | tf.protocol = ATA_PROT_PIO; |
1da177e4 | 1146 | |
a0123703 | 1147 | err_mask = ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE, |
49016aca | 1148 | id, sizeof(id[0]) * ATA_ID_WORDS); |
a0123703 | 1149 | if (err_mask) { |
49016aca TH |
1150 | rc = -EIO; |
1151 | reason = "I/O error"; | |
1da177e4 LT |
1152 | goto err_out; |
1153 | } | |
1154 | ||
49016aca | 1155 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 1156 | |
49016aca | 1157 | /* sanity check */ |
692785e7 | 1158 | if ((class == ATA_DEV_ATA) != (ata_id_is_ata(id) | ata_id_is_cfa(id))) { |
49016aca TH |
1159 | rc = -EINVAL; |
1160 | reason = "device reports illegal type"; | |
1161 | goto err_out; | |
1162 | } | |
1163 | ||
1164 | if (post_reset && class == ATA_DEV_ATA) { | |
1165 | /* | |
1166 | * The exact sequence expected by certain pre-ATA4 drives is: | |
1167 | * SRST RESET | |
1168 | * IDENTIFY | |
1169 | * INITIALIZE DEVICE PARAMETERS | |
1170 | * anything else.. | |
1171 | * Some drives were very specific about that exact sequence. | |
1172 | */ | |
1173 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
00b6f5e9 | 1174 | err_mask = ata_dev_init_params(ap, dev, id[3], id[6]); |
49016aca TH |
1175 | if (err_mask) { |
1176 | rc = -EIO; | |
1177 | reason = "INIT_DEV_PARAMS failed"; | |
1178 | goto err_out; | |
1179 | } | |
1180 | ||
1181 | /* current CHS translation info (id[53-58]) might be | |
1182 | * changed. reread the identify device info. | |
1183 | */ | |
1184 | post_reset = 0; | |
1185 | goto retry; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | *p_class = class; | |
d9572b1d | 1190 | *p_id = id; |
49016aca TH |
1191 | return 0; |
1192 | ||
1193 | err_out: | |
1194 | printk(KERN_WARNING "ata%u: dev %u failed to IDENTIFY (%s)\n", | |
1195 | ap->id, dev->devno, reason); | |
d9572b1d | 1196 | kfree(id); |
49016aca TH |
1197 | return rc; |
1198 | } | |
1199 | ||
4b2f3ede TH |
1200 | static inline u8 ata_dev_knobble(const struct ata_port *ap, |
1201 | struct ata_device *dev) | |
1202 | { | |
1203 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
1204 | } | |
1205 | ||
49016aca | 1206 | /** |
ffeae418 TH |
1207 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
1208 | * @ap: Port on which target device resides | |
1209 | * @dev: Target device to configure | |
4c2d721a | 1210 | * @print_info: Enable device info printout |
ffeae418 TH |
1211 | * |
1212 | * Configure @dev according to @dev->id. Generic and low-level | |
1213 | * driver specific fixups are also applied. | |
49016aca TH |
1214 | * |
1215 | * LOCKING: | |
ffeae418 TH |
1216 | * Kernel thread context (may sleep) |
1217 | * | |
1218 | * RETURNS: | |
1219 | * 0 on success, -errno otherwise | |
49016aca | 1220 | */ |
4c2d721a TH |
1221 | static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev, |
1222 | int print_info) | |
49016aca | 1223 | { |
1148c3a7 | 1224 | const u16 *id = dev->id; |
ff8854b2 | 1225 | unsigned int xfer_mask; |
49016aca TH |
1226 | int i, rc; |
1227 | ||
e1211e3f | 1228 | if (!ata_dev_enabled(dev)) { |
49016aca | 1229 | DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n", |
ffeae418 TH |
1230 | ap->id, dev->devno); |
1231 | return 0; | |
49016aca TH |
1232 | } |
1233 | ||
ffeae418 | 1234 | DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno); |
1da177e4 | 1235 | |
c39f5ebe TH |
1236 | /* print device capabilities */ |
1237 | if (print_info) | |
1238 | printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x " | |
1239 | "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n", | |
1240 | ap->id, dev->devno, id[49], id[82], id[83], | |
1241 | id[84], id[85], id[86], id[87], id[88]); | |
1242 | ||
208a9933 TH |
1243 | /* initialize to-be-configured parameters */ |
1244 | dev->flags = 0; | |
1245 | dev->max_sectors = 0; | |
1246 | dev->cdb_len = 0; | |
1247 | dev->n_sectors = 0; | |
1248 | dev->cylinders = 0; | |
1249 | dev->heads = 0; | |
1250 | dev->sectors = 0; | |
1251 | ||
1da177e4 LT |
1252 | /* |
1253 | * common ATA, ATAPI feature tests | |
1254 | */ | |
1255 | ||
ff8854b2 | 1256 | /* find max transfer mode; for printk only */ |
1148c3a7 | 1257 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 1258 | |
1148c3a7 | 1259 | ata_dump_id(id); |
1da177e4 LT |
1260 | |
1261 | /* ATA-specific feature tests */ | |
1262 | if (dev->class == ATA_DEV_ATA) { | |
1148c3a7 | 1263 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 1264 | |
1148c3a7 | 1265 | if (ata_id_has_lba(id)) { |
4c2d721a | 1266 | const char *lba_desc; |
8bf62ece | 1267 | |
4c2d721a TH |
1268 | lba_desc = "LBA"; |
1269 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 1270 | if (ata_id_has_lba48(id)) { |
8bf62ece | 1271 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a TH |
1272 | lba_desc = "LBA48"; |
1273 | } | |
8bf62ece AL |
1274 | |
1275 | /* print device info to dmesg */ | |
4c2d721a TH |
1276 | if (print_info) |
1277 | printk(KERN_INFO "ata%u: dev %u ATA-%d, " | |
1278 | "max %s, %Lu sectors: %s\n", | |
1279 | ap->id, dev->devno, | |
1148c3a7 | 1280 | ata_id_major_version(id), |
ff8854b2 | 1281 | ata_mode_string(xfer_mask), |
4c2d721a TH |
1282 | (unsigned long long)dev->n_sectors, |
1283 | lba_desc); | |
ffeae418 | 1284 | } else { |
8bf62ece AL |
1285 | /* CHS */ |
1286 | ||
1287 | /* Default translation */ | |
1148c3a7 TH |
1288 | dev->cylinders = id[1]; |
1289 | dev->heads = id[3]; | |
1290 | dev->sectors = id[6]; | |
8bf62ece | 1291 | |
1148c3a7 | 1292 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 1293 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
1294 | dev->cylinders = id[54]; |
1295 | dev->heads = id[55]; | |
1296 | dev->sectors = id[56]; | |
8bf62ece AL |
1297 | } |
1298 | ||
1299 | /* print device info to dmesg */ | |
4c2d721a TH |
1300 | if (print_info) |
1301 | printk(KERN_INFO "ata%u: dev %u ATA-%d, " | |
1302 | "max %s, %Lu sectors: CHS %u/%u/%u\n", | |
1303 | ap->id, dev->devno, | |
1148c3a7 | 1304 | ata_id_major_version(id), |
ff8854b2 | 1305 | ata_mode_string(xfer_mask), |
4c2d721a TH |
1306 | (unsigned long long)dev->n_sectors, |
1307 | dev->cylinders, dev->heads, dev->sectors); | |
1da177e4 LT |
1308 | } |
1309 | ||
6e7846e9 | 1310 | dev->cdb_len = 16; |
1da177e4 LT |
1311 | } |
1312 | ||
1313 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 1314 | else if (dev->class == ATA_DEV_ATAPI) { |
1148c3a7 | 1315 | rc = atapi_cdb_len(id); |
1da177e4 LT |
1316 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
1317 | printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id); | |
ffeae418 | 1318 | rc = -EINVAL; |
1da177e4 LT |
1319 | goto err_out_nosup; |
1320 | } | |
6e7846e9 | 1321 | dev->cdb_len = (unsigned int) rc; |
1da177e4 LT |
1322 | |
1323 | /* print device info to dmesg */ | |
4c2d721a TH |
1324 | if (print_info) |
1325 | printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n", | |
ff8854b2 | 1326 | ap->id, dev->devno, ata_mode_string(xfer_mask)); |
1da177e4 LT |
1327 | } |
1328 | ||
6e7846e9 TH |
1329 | ap->host->max_cmd_len = 0; |
1330 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1331 | ap->host->max_cmd_len = max_t(unsigned int, | |
1332 | ap->host->max_cmd_len, | |
1333 | ap->device[i].cdb_len); | |
1334 | ||
4b2f3ede TH |
1335 | /* limit bridge transfers to udma5, 200 sectors */ |
1336 | if (ata_dev_knobble(ap, dev)) { | |
4c2d721a TH |
1337 | if (print_info) |
1338 | printk(KERN_INFO "ata%u(%u): applying bridge limits\n", | |
1339 | ap->id, dev->devno); | |
5a529139 | 1340 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
1341 | dev->max_sectors = ATA_MAX_SECTORS; |
1342 | } | |
1343 | ||
1344 | if (ap->ops->dev_config) | |
1345 | ap->ops->dev_config(ap, dev); | |
1346 | ||
1da177e4 | 1347 | DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap)); |
ffeae418 | 1348 | return 0; |
1da177e4 LT |
1349 | |
1350 | err_out_nosup: | |
1da177e4 | 1351 | DPRINTK("EXIT, err\n"); |
ffeae418 | 1352 | return rc; |
1da177e4 LT |
1353 | } |
1354 | ||
1355 | /** | |
1356 | * ata_bus_probe - Reset and probe ATA bus | |
1357 | * @ap: Bus to probe | |
1358 | * | |
0cba632b JG |
1359 | * Master ATA bus probing function. Initiates a hardware-dependent |
1360 | * bus reset, then attempts to identify any devices found on | |
1361 | * the bus. | |
1362 | * | |
1da177e4 | 1363 | * LOCKING: |
0cba632b | 1364 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1365 | * |
1366 | * RETURNS: | |
96072e69 | 1367 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
1368 | */ |
1369 | ||
1370 | static int ata_bus_probe(struct ata_port *ap) | |
1371 | { | |
28ca5c57 | 1372 | unsigned int classes[ATA_MAX_DEVICES]; |
96072e69 | 1373 | int i, rc, found = 0; |
e82cbdb9 | 1374 | struct ata_device *dev; |
1da177e4 | 1375 | |
28ca5c57 | 1376 | ata_port_probe(ap); |
c19ba8af | 1377 | |
2044470c TH |
1378 | /* reset and determine device classes */ |
1379 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
1380 | classes[i] = ATA_DEV_UNKNOWN; | |
2061a47a | 1381 | |
2044470c | 1382 | if (ap->ops->probe_reset) { |
c19ba8af | 1383 | rc = ap->ops->probe_reset(ap, classes); |
28ca5c57 TH |
1384 | if (rc) { |
1385 | printk("ata%u: reset failed (errno=%d)\n", ap->id, rc); | |
1386 | return rc; | |
c19ba8af | 1387 | } |
28ca5c57 | 1388 | } else { |
c19ba8af TH |
1389 | ap->ops->phy_reset(ap); |
1390 | ||
2044470c TH |
1391 | if (!(ap->flags & ATA_FLAG_PORT_DISABLED)) |
1392 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
28ca5c57 | 1393 | classes[i] = ap->device[i].class; |
2044470c | 1394 | |
28ca5c57 TH |
1395 | ata_port_probe(ap); |
1396 | } | |
1da177e4 | 1397 | |
2044470c TH |
1398 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1399 | if (classes[i] == ATA_DEV_UNKNOWN) | |
1400 | classes[i] = ATA_DEV_NONE; | |
1401 | ||
28ca5c57 | 1402 | /* read IDENTIFY page and configure devices */ |
1da177e4 | 1403 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
e82cbdb9 | 1404 | dev = &ap->device[i]; |
28ca5c57 TH |
1405 | dev->class = classes[i]; |
1406 | ||
e1211e3f | 1407 | if (!ata_dev_enabled(dev)) |
ffeae418 TH |
1408 | continue; |
1409 | ||
1410 | WARN_ON(dev->id != NULL); | |
1411 | if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) { | |
1412 | dev->class = ATA_DEV_NONE; | |
1413 | continue; | |
1414 | } | |
1415 | ||
4c2d721a | 1416 | if (ata_dev_configure(ap, dev, 1)) { |
fcef978f | 1417 | ata_dev_disable(ap, dev); |
ffeae418 | 1418 | continue; |
1da177e4 | 1419 | } |
ffeae418 | 1420 | |
ffeae418 | 1421 | found = 1; |
1da177e4 LT |
1422 | } |
1423 | ||
e82cbdb9 TH |
1424 | /* configure transfer mode */ |
1425 | if (ap->ops->set_mode) { | |
1426 | /* FIXME: make ->set_mode handle no device case and | |
1427 | * return error code and failing device on failure as | |
1428 | * ata_set_mode() does. | |
1429 | */ | |
1430 | if (found) | |
1431 | ap->ops->set_mode(ap); | |
1432 | rc = 0; | |
1433 | } else { | |
1434 | while (ata_set_mode(ap, &dev)) | |
1435 | ata_dev_disable(ap, dev); | |
1436 | } | |
1da177e4 | 1437 | |
e82cbdb9 TH |
1438 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
1439 | if (ata_dev_enabled(&ap->device[i])) | |
1440 | return 0; | |
1da177e4 | 1441 | |
e82cbdb9 TH |
1442 | /* no device present, disable port */ |
1443 | ata_port_disable(ap); | |
1da177e4 | 1444 | ap->ops->port_disable(ap); |
96072e69 | 1445 | return -ENODEV; |
1da177e4 LT |
1446 | } |
1447 | ||
1448 | /** | |
0cba632b JG |
1449 | * ata_port_probe - Mark port as enabled |
1450 | * @ap: Port for which we indicate enablement | |
1da177e4 | 1451 | * |
0cba632b JG |
1452 | * Modify @ap data structure such that the system |
1453 | * thinks that the entire port is enabled. | |
1454 | * | |
1455 | * LOCKING: host_set lock, or some other form of | |
1456 | * serialization. | |
1da177e4 LT |
1457 | */ |
1458 | ||
1459 | void ata_port_probe(struct ata_port *ap) | |
1460 | { | |
1461 | ap->flags &= ~ATA_FLAG_PORT_DISABLED; | |
1462 | } | |
1463 | ||
3be680b7 TH |
1464 | /** |
1465 | * sata_print_link_status - Print SATA link status | |
1466 | * @ap: SATA port to printk link status about | |
1467 | * | |
1468 | * This function prints link speed and status of a SATA link. | |
1469 | * | |
1470 | * LOCKING: | |
1471 | * None. | |
1472 | */ | |
1473 | static void sata_print_link_status(struct ata_port *ap) | |
1474 | { | |
1475 | u32 sstatus, tmp; | |
3be680b7 TH |
1476 | |
1477 | if (!ap->ops->scr_read) | |
1478 | return; | |
1479 | ||
1480 | sstatus = scr_read(ap, SCR_STATUS); | |
1481 | ||
1482 | if (sata_dev_present(ap)) { | |
1483 | tmp = (sstatus >> 4) & 0xf; | |
4c360c81 TH |
1484 | printk(KERN_INFO "ata%u: SATA link up %s (SStatus %X)\n", |
1485 | ap->id, sata_spd_string(tmp), sstatus); | |
3be680b7 TH |
1486 | } else { |
1487 | printk(KERN_INFO "ata%u: SATA link down (SStatus %X)\n", | |
1488 | ap->id, sstatus); | |
1489 | } | |
1490 | } | |
1491 | ||
1da177e4 | 1492 | /** |
780a87f7 JG |
1493 | * __sata_phy_reset - Wake/reset a low-level SATA PHY |
1494 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1495 | * |
780a87f7 JG |
1496 | * This function issues commands to standard SATA Sxxx |
1497 | * PHY registers, to wake up the phy (and device), and | |
1498 | * clear any reset condition. | |
1da177e4 LT |
1499 | * |
1500 | * LOCKING: | |
0cba632b | 1501 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1502 | * |
1503 | */ | |
1504 | void __sata_phy_reset(struct ata_port *ap) | |
1505 | { | |
1506 | u32 sstatus; | |
1507 | unsigned long timeout = jiffies + (HZ * 5); | |
1508 | ||
1509 | if (ap->flags & ATA_FLAG_SATA_RESET) { | |
cdcca89e BR |
1510 | /* issue phy wake/reset */ |
1511 | scr_write_flush(ap, SCR_CONTROL, 0x301); | |
62ba2841 TH |
1512 | /* Couldn't find anything in SATA I/II specs, but |
1513 | * AHCI-1.1 10.4.2 says at least 1 ms. */ | |
1514 | mdelay(1); | |
1da177e4 | 1515 | } |
cdcca89e | 1516 | scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */ |
1da177e4 LT |
1517 | |
1518 | /* wait for phy to become ready, if necessary */ | |
1519 | do { | |
1520 | msleep(200); | |
1521 | sstatus = scr_read(ap, SCR_STATUS); | |
1522 | if ((sstatus & 0xf) != 1) | |
1523 | break; | |
1524 | } while (time_before(jiffies, timeout)); | |
1525 | ||
3be680b7 TH |
1526 | /* print link status */ |
1527 | sata_print_link_status(ap); | |
656563e3 | 1528 | |
3be680b7 TH |
1529 | /* TODO: phy layer with polling, timeouts, etc. */ |
1530 | if (sata_dev_present(ap)) | |
1da177e4 | 1531 | ata_port_probe(ap); |
3be680b7 | 1532 | else |
1da177e4 | 1533 | ata_port_disable(ap); |
1da177e4 LT |
1534 | |
1535 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1536 | return; | |
1537 | ||
1538 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
1539 | ata_port_disable(ap); | |
1540 | return; | |
1541 | } | |
1542 | ||
1543 | ap->cbl = ATA_CBL_SATA; | |
1544 | } | |
1545 | ||
1546 | /** | |
780a87f7 JG |
1547 | * sata_phy_reset - Reset SATA bus. |
1548 | * @ap: SATA port associated with target SATA PHY. | |
1da177e4 | 1549 | * |
780a87f7 JG |
1550 | * This function resets the SATA bus, and then probes |
1551 | * the bus for devices. | |
1da177e4 LT |
1552 | * |
1553 | * LOCKING: | |
0cba632b | 1554 | * PCI/etc. bus probe sem. |
1da177e4 LT |
1555 | * |
1556 | */ | |
1557 | void sata_phy_reset(struct ata_port *ap) | |
1558 | { | |
1559 | __sata_phy_reset(ap); | |
1560 | if (ap->flags & ATA_FLAG_PORT_DISABLED) | |
1561 | return; | |
1562 | ata_bus_reset(ap); | |
1563 | } | |
1564 | ||
ebdfca6e AC |
1565 | /** |
1566 | * ata_dev_pair - return other device on cable | |
1567 | * @ap: port | |
1568 | * @adev: device | |
1569 | * | |
1570 | * Obtain the other device on the same cable, or if none is | |
1571 | * present NULL is returned | |
1572 | */ | |
2e9edbf8 | 1573 | |
ebdfca6e AC |
1574 | struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev) |
1575 | { | |
1576 | struct ata_device *pair = &ap->device[1 - adev->devno]; | |
e1211e3f | 1577 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
1578 | return NULL; |
1579 | return pair; | |
1580 | } | |
1581 | ||
1da177e4 | 1582 | /** |
780a87f7 JG |
1583 | * ata_port_disable - Disable port. |
1584 | * @ap: Port to be disabled. | |
1da177e4 | 1585 | * |
780a87f7 JG |
1586 | * Modify @ap data structure such that the system |
1587 | * thinks that the entire port is disabled, and should | |
1588 | * never attempt to probe or communicate with devices | |
1589 | * on this port. | |
1590 | * | |
1591 | * LOCKING: host_set lock, or some other form of | |
1592 | * serialization. | |
1da177e4 LT |
1593 | */ |
1594 | ||
1595 | void ata_port_disable(struct ata_port *ap) | |
1596 | { | |
1597 | ap->device[0].class = ATA_DEV_NONE; | |
1598 | ap->device[1].class = ATA_DEV_NONE; | |
1599 | ap->flags |= ATA_FLAG_PORT_DISABLED; | |
1600 | } | |
1601 | ||
1c3fae4d TH |
1602 | /** |
1603 | * ata_down_sata_spd_limit - adjust SATA spd limit downward | |
1604 | * @ap: Port to adjust SATA spd limit for | |
1605 | * | |
1606 | * Adjust SATA spd limit of @ap downward. Note that this | |
1607 | * function only adjusts the limit. The change must be applied | |
1608 | * using ata_set_sata_spd(). | |
1609 | * | |
1610 | * LOCKING: | |
1611 | * Inherited from caller. | |
1612 | * | |
1613 | * RETURNS: | |
1614 | * 0 on success, negative errno on failure | |
1615 | */ | |
1616 | static int ata_down_sata_spd_limit(struct ata_port *ap) | |
1617 | { | |
1618 | u32 spd, mask; | |
1619 | int highbit; | |
1620 | ||
1621 | if (ap->cbl != ATA_CBL_SATA || !ap->ops->scr_read) | |
1622 | return -EOPNOTSUPP; | |
1623 | ||
1624 | mask = ap->sata_spd_limit; | |
1625 | if (mask <= 1) | |
1626 | return -EINVAL; | |
1627 | highbit = fls(mask) - 1; | |
1628 | mask &= ~(1 << highbit); | |
1629 | ||
1630 | spd = (scr_read(ap, SCR_STATUS) >> 4) & 0xf; | |
1631 | if (spd <= 1) | |
1632 | return -EINVAL; | |
1633 | spd--; | |
1634 | mask &= (1 << spd) - 1; | |
1635 | if (!mask) | |
1636 | return -EINVAL; | |
1637 | ||
1638 | ap->sata_spd_limit = mask; | |
1639 | ||
1640 | printk(KERN_WARNING "ata%u: limiting SATA link speed to %s\n", | |
1641 | ap->id, sata_spd_string(fls(mask))); | |
1642 | ||
1643 | return 0; | |
1644 | } | |
1645 | ||
1646 | static int __ata_set_sata_spd_needed(struct ata_port *ap, u32 *scontrol) | |
1647 | { | |
1648 | u32 spd, limit; | |
1649 | ||
1650 | if (ap->sata_spd_limit == UINT_MAX) | |
1651 | limit = 0; | |
1652 | else | |
1653 | limit = fls(ap->sata_spd_limit); | |
1654 | ||
1655 | spd = (*scontrol >> 4) & 0xf; | |
1656 | *scontrol = (*scontrol & ~0xf0) | ((limit & 0xf) << 4); | |
1657 | ||
1658 | return spd != limit; | |
1659 | } | |
1660 | ||
1661 | /** | |
1662 | * ata_set_sata_spd_needed - is SATA spd configuration needed | |
1663 | * @ap: Port in question | |
1664 | * | |
1665 | * Test whether the spd limit in SControl matches | |
1666 | * @ap->sata_spd_limit. This function is used to determine | |
1667 | * whether hardreset is necessary to apply SATA spd | |
1668 | * configuration. | |
1669 | * | |
1670 | * LOCKING: | |
1671 | * Inherited from caller. | |
1672 | * | |
1673 | * RETURNS: | |
1674 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
1675 | */ | |
1676 | static int ata_set_sata_spd_needed(struct ata_port *ap) | |
1677 | { | |
1678 | u32 scontrol; | |
1679 | ||
1680 | if (ap->cbl != ATA_CBL_SATA || !ap->ops->scr_read) | |
1681 | return 0; | |
1682 | ||
1683 | scontrol = scr_read(ap, SCR_CONTROL); | |
1684 | ||
1685 | return __ata_set_sata_spd_needed(ap, &scontrol); | |
1686 | } | |
1687 | ||
1688 | /** | |
1689 | * ata_set_sata_spd - set SATA spd according to spd limit | |
1690 | * @ap: Port to set SATA spd for | |
1691 | * | |
1692 | * Set SATA spd of @ap according to sata_spd_limit. | |
1693 | * | |
1694 | * LOCKING: | |
1695 | * Inherited from caller. | |
1696 | * | |
1697 | * RETURNS: | |
1698 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
1699 | * changed. -EOPNOTSUPP if SCR registers are inaccessible. | |
1700 | */ | |
1701 | static int ata_set_sata_spd(struct ata_port *ap) | |
1702 | { | |
1703 | u32 scontrol; | |
1704 | ||
1705 | if (ap->cbl != ATA_CBL_SATA || !ap->ops->scr_read) | |
1706 | return -EOPNOTSUPP; | |
1707 | ||
1708 | scontrol = scr_read(ap, SCR_CONTROL); | |
1709 | if (!__ata_set_sata_spd_needed(ap, &scontrol)) | |
1710 | return 0; | |
1711 | ||
1712 | scr_write(ap, SCR_CONTROL, scontrol); | |
1713 | return 1; | |
1714 | } | |
1715 | ||
452503f9 AC |
1716 | /* |
1717 | * This mode timing computation functionality is ported over from | |
1718 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
1719 | */ | |
1720 | /* | |
1721 | * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). | |
1722 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except | |
1723 | * for PIO 5, which is a nonstandard extension and UDMA6, which | |
2e9edbf8 | 1724 | * is currently supported only by Maxtor drives. |
452503f9 AC |
1725 | */ |
1726 | ||
1727 | static const struct ata_timing ata_timing[] = { | |
1728 | ||
1729 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
1730 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
1731 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
1732 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
1733 | ||
1734 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
1735 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
1736 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, | |
1737 | ||
1738 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
2e9edbf8 | 1739 | |
452503f9 AC |
1740 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
1741 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
1742 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, | |
2e9edbf8 | 1743 | |
452503f9 AC |
1744 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
1745 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
1746 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, | |
1747 | ||
1748 | /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */ | |
1749 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
1750 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
1751 | ||
1752 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
1753 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
1754 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
1755 | ||
1756 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ | |
1757 | ||
1758 | { 0xFF } | |
1759 | }; | |
1760 | ||
1761 | #define ENOUGH(v,unit) (((v)-1)/(unit)+1) | |
1762 | #define EZ(v,unit) ((v)?ENOUGH(v,unit):0) | |
1763 | ||
1764 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
1765 | { | |
1766 | q->setup = EZ(t->setup * 1000, T); | |
1767 | q->act8b = EZ(t->act8b * 1000, T); | |
1768 | q->rec8b = EZ(t->rec8b * 1000, T); | |
1769 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
1770 | q->active = EZ(t->active * 1000, T); | |
1771 | q->recover = EZ(t->recover * 1000, T); | |
1772 | q->cycle = EZ(t->cycle * 1000, T); | |
1773 | q->udma = EZ(t->udma * 1000, UT); | |
1774 | } | |
1775 | ||
1776 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
1777 | struct ata_timing *m, unsigned int what) | |
1778 | { | |
1779 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
1780 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
1781 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
1782 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
1783 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
1784 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
1785 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
1786 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
1787 | } | |
1788 | ||
1789 | static const struct ata_timing* ata_timing_find_mode(unsigned short speed) | |
1790 | { | |
1791 | const struct ata_timing *t; | |
1792 | ||
1793 | for (t = ata_timing; t->mode != speed; t++) | |
91190758 | 1794 | if (t->mode == 0xFF) |
452503f9 | 1795 | return NULL; |
2e9edbf8 | 1796 | return t; |
452503f9 AC |
1797 | } |
1798 | ||
1799 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
1800 | struct ata_timing *t, int T, int UT) | |
1801 | { | |
1802 | const struct ata_timing *s; | |
1803 | struct ata_timing p; | |
1804 | ||
1805 | /* | |
2e9edbf8 | 1806 | * Find the mode. |
75b1f2f8 | 1807 | */ |
452503f9 AC |
1808 | |
1809 | if (!(s = ata_timing_find_mode(speed))) | |
1810 | return -EINVAL; | |
1811 | ||
75b1f2f8 AL |
1812 | memcpy(t, s, sizeof(*s)); |
1813 | ||
452503f9 AC |
1814 | /* |
1815 | * If the drive is an EIDE drive, it can tell us it needs extended | |
1816 | * PIO/MW_DMA cycle timing. | |
1817 | */ | |
1818 | ||
1819 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
1820 | memset(&p, 0, sizeof(p)); | |
1821 | if(speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { | |
1822 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; | |
1823 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
1824 | } else if(speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { | |
1825 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; | |
1826 | } | |
1827 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | * Convert the timing to bus clock counts. | |
1832 | */ | |
1833 | ||
75b1f2f8 | 1834 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
1835 | |
1836 | /* | |
c893a3ae RD |
1837 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
1838 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
1839 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
1840 | */ |
1841 | ||
1842 | if (speed > XFER_PIO_4) { | |
1843 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); | |
1844 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
1845 | } | |
1846 | ||
1847 | /* | |
c893a3ae | 1848 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
1849 | */ |
1850 | ||
1851 | if (t->act8b + t->rec8b < t->cyc8b) { | |
1852 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
1853 | t->rec8b = t->cyc8b - t->act8b; | |
1854 | } | |
1855 | ||
1856 | if (t->active + t->recover < t->cycle) { | |
1857 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
1858 | t->recover = t->cycle - t->active; | |
1859 | } | |
1860 | ||
1861 | return 0; | |
1862 | } | |
1863 | ||
cf176e1a TH |
1864 | /** |
1865 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
1866 | * @ap: Port associated with device @dev | |
1867 | * @dev: Device to adjust xfer masks | |
1868 | * @force_pio0: Force PIO0 | |
1869 | * | |
1870 | * Adjust xfer masks of @dev downward. Note that this function | |
1871 | * does not apply the change. Invoking ata_set_mode() afterwards | |
1872 | * will apply the limit. | |
1873 | * | |
1874 | * LOCKING: | |
1875 | * Inherited from caller. | |
1876 | * | |
1877 | * RETURNS: | |
1878 | * 0 on success, negative errno on failure | |
1879 | */ | |
1880 | static int ata_down_xfermask_limit(struct ata_port *ap, struct ata_device *dev, | |
1881 | int force_pio0) | |
1882 | { | |
1883 | unsigned long xfer_mask; | |
1884 | int highbit; | |
1885 | ||
1886 | xfer_mask = ata_pack_xfermask(dev->pio_mask, dev->mwdma_mask, | |
1887 | dev->udma_mask); | |
1888 | ||
1889 | if (!xfer_mask) | |
1890 | goto fail; | |
1891 | /* don't gear down to MWDMA from UDMA, go directly to PIO */ | |
1892 | if (xfer_mask & ATA_MASK_UDMA) | |
1893 | xfer_mask &= ~ATA_MASK_MWDMA; | |
1894 | ||
1895 | highbit = fls(xfer_mask) - 1; | |
1896 | xfer_mask &= ~(1 << highbit); | |
1897 | if (force_pio0) | |
1898 | xfer_mask &= 1 << ATA_SHIFT_PIO; | |
1899 | if (!xfer_mask) | |
1900 | goto fail; | |
1901 | ||
1902 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
1903 | &dev->udma_mask); | |
1904 | ||
1905 | printk(KERN_WARNING "ata%u: dev %u limiting speed to %s\n", | |
1906 | ap->id, dev->devno, ata_mode_string(xfer_mask)); | |
1907 | ||
1908 | return 0; | |
1909 | ||
1910 | fail: | |
1911 | return -EINVAL; | |
1912 | } | |
1913 | ||
83206a29 | 1914 | static int ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev) |
1da177e4 | 1915 | { |
83206a29 TH |
1916 | unsigned int err_mask; |
1917 | int rc; | |
1da177e4 LT |
1918 | |
1919 | if (dev->xfer_shift == ATA_SHIFT_PIO) | |
1920 | dev->flags |= ATA_DFLAG_PIO; | |
1921 | ||
83206a29 TH |
1922 | err_mask = ata_dev_set_xfermode(ap, dev); |
1923 | if (err_mask) { | |
1924 | printk(KERN_ERR | |
1925 | "ata%u: failed to set xfermode (err_mask=0x%x)\n", | |
1926 | ap->id, err_mask); | |
1927 | return -EIO; | |
1928 | } | |
1da177e4 | 1929 | |
83206a29 TH |
1930 | rc = ata_dev_revalidate(ap, dev, 0); |
1931 | if (rc) { | |
1932 | printk(KERN_ERR | |
1933 | "ata%u: failed to revalidate after set xfermode\n", | |
1934 | ap->id); | |
1935 | return rc; | |
48a8a14f TH |
1936 | } |
1937 | ||
23e71c3d TH |
1938 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
1939 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 LT |
1940 | |
1941 | printk(KERN_INFO "ata%u: dev %u configured for %s\n", | |
23e71c3d TH |
1942 | ap->id, dev->devno, |
1943 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode))); | |
83206a29 | 1944 | return 0; |
1da177e4 LT |
1945 | } |
1946 | ||
1da177e4 LT |
1947 | /** |
1948 | * ata_set_mode - Program timings and issue SET FEATURES - XFER | |
1949 | * @ap: port on which timings will be programmed | |
e82cbdb9 | 1950 | * @r_failed_dev: out paramter for failed device |
1da177e4 | 1951 | * |
e82cbdb9 TH |
1952 | * Set ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
1953 | * ata_set_mode() fails, pointer to the failing device is | |
1954 | * returned in @r_failed_dev. | |
780a87f7 | 1955 | * |
1da177e4 | 1956 | * LOCKING: |
0cba632b | 1957 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
1958 | * |
1959 | * RETURNS: | |
1960 | * 0 on success, negative errno otherwise | |
1da177e4 | 1961 | */ |
e82cbdb9 | 1962 | static int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev) |
1da177e4 | 1963 | { |
e8e0619f | 1964 | struct ata_device *dev; |
e82cbdb9 | 1965 | int i, rc = 0, used_dma = 0, found = 0; |
1da177e4 | 1966 | |
a6d5a51c TH |
1967 | /* step 1: calculate xfer_mask */ |
1968 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
acf356b1 | 1969 | unsigned int pio_mask, dma_mask; |
a6d5a51c | 1970 | |
e8e0619f TH |
1971 | dev = &ap->device[i]; |
1972 | ||
e1211e3f | 1973 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
1974 | continue; |
1975 | ||
acf356b1 | 1976 | ata_dev_xfermask(ap, dev); |
1da177e4 | 1977 | |
acf356b1 TH |
1978 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
1979 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
1980 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); | |
1981 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 1982 | |
4f65977d | 1983 | found = 1; |
5444a6f4 AC |
1984 | if (dev->dma_mode) |
1985 | used_dma = 1; | |
a6d5a51c | 1986 | } |
4f65977d | 1987 | if (!found) |
e82cbdb9 | 1988 | goto out; |
a6d5a51c TH |
1989 | |
1990 | /* step 2: always set host PIO timings */ | |
e8e0619f TH |
1991 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
1992 | dev = &ap->device[i]; | |
1993 | if (!ata_dev_enabled(dev)) | |
1994 | continue; | |
1995 | ||
1996 | if (!dev->pio_mode) { | |
1997 | printk(KERN_WARNING "ata%u: dev %u no PIO support\n", | |
1998 | ap->id, dev->devno); | |
1999 | rc = -EINVAL; | |
e82cbdb9 | 2000 | goto out; |
e8e0619f TH |
2001 | } |
2002 | ||
2003 | dev->xfer_mode = dev->pio_mode; | |
2004 | dev->xfer_shift = ATA_SHIFT_PIO; | |
2005 | if (ap->ops->set_piomode) | |
2006 | ap->ops->set_piomode(ap, dev); | |
2007 | } | |
1da177e4 | 2008 | |
a6d5a51c | 2009 | /* step 3: set host DMA timings */ |
e8e0619f TH |
2010 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2011 | dev = &ap->device[i]; | |
2012 | ||
2013 | if (!ata_dev_enabled(dev) || !dev->dma_mode) | |
2014 | continue; | |
2015 | ||
2016 | dev->xfer_mode = dev->dma_mode; | |
2017 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
2018 | if (ap->ops->set_dmamode) | |
2019 | ap->ops->set_dmamode(ap, dev); | |
2020 | } | |
1da177e4 LT |
2021 | |
2022 | /* step 4: update devices' xfer mode */ | |
83206a29 | 2023 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
e8e0619f | 2024 | dev = &ap->device[i]; |
1da177e4 | 2025 | |
e1211e3f | 2026 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
2027 | continue; |
2028 | ||
5bbc53f4 TH |
2029 | rc = ata_dev_set_mode(ap, dev); |
2030 | if (rc) | |
e82cbdb9 | 2031 | goto out; |
83206a29 | 2032 | } |
1da177e4 | 2033 | |
e8e0619f TH |
2034 | /* Record simplex status. If we selected DMA then the other |
2035 | * host channels are not permitted to do so. | |
5444a6f4 | 2036 | */ |
5444a6f4 AC |
2037 | if (used_dma && (ap->host_set->flags & ATA_HOST_SIMPLEX)) |
2038 | ap->host_set->simplex_claimed = 1; | |
2039 | ||
e8e0619f | 2040 | /* step5: chip specific finalisation */ |
1da177e4 LT |
2041 | if (ap->ops->post_set_mode) |
2042 | ap->ops->post_set_mode(ap); | |
2043 | ||
e82cbdb9 TH |
2044 | out: |
2045 | if (rc) | |
2046 | *r_failed_dev = dev; | |
2047 | return rc; | |
1da177e4 LT |
2048 | } |
2049 | ||
1fdffbce JG |
2050 | /** |
2051 | * ata_tf_to_host - issue ATA taskfile to host controller | |
2052 | * @ap: port to which command is being issued | |
2053 | * @tf: ATA taskfile register set | |
2054 | * | |
2055 | * Issues ATA taskfile register set to ATA host controller, | |
2056 | * with proper synchronization with interrupt handler and | |
2057 | * other threads. | |
2058 | * | |
2059 | * LOCKING: | |
2060 | * spin_lock_irqsave(host_set lock) | |
2061 | */ | |
2062 | ||
2063 | static inline void ata_tf_to_host(struct ata_port *ap, | |
2064 | const struct ata_taskfile *tf) | |
2065 | { | |
2066 | ap->ops->tf_load(ap, tf); | |
2067 | ap->ops->exec_command(ap, tf); | |
2068 | } | |
2069 | ||
1da177e4 LT |
2070 | /** |
2071 | * ata_busy_sleep - sleep until BSY clears, or timeout | |
2072 | * @ap: port containing status register to be polled | |
2073 | * @tmout_pat: impatience timeout | |
2074 | * @tmout: overall timeout | |
2075 | * | |
780a87f7 JG |
2076 | * Sleep until ATA Status register bit BSY clears, |
2077 | * or a timeout occurs. | |
2078 | * | |
2079 | * LOCKING: None. | |
1da177e4 LT |
2080 | */ |
2081 | ||
6f8b9958 TH |
2082 | unsigned int ata_busy_sleep (struct ata_port *ap, |
2083 | unsigned long tmout_pat, unsigned long tmout) | |
1da177e4 LT |
2084 | { |
2085 | unsigned long timer_start, timeout; | |
2086 | u8 status; | |
2087 | ||
2088 | status = ata_busy_wait(ap, ATA_BUSY, 300); | |
2089 | timer_start = jiffies; | |
2090 | timeout = timer_start + tmout_pat; | |
2091 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
2092 | msleep(50); | |
2093 | status = ata_busy_wait(ap, ATA_BUSY, 3); | |
2094 | } | |
2095 | ||
2096 | if (status & ATA_BUSY) | |
2097 | printk(KERN_WARNING "ata%u is slow to respond, " | |
2098 | "please be patient\n", ap->id); | |
2099 | ||
2100 | timeout = timer_start + tmout; | |
2101 | while ((status & ATA_BUSY) && (time_before(jiffies, timeout))) { | |
2102 | msleep(50); | |
2103 | status = ata_chk_status(ap); | |
2104 | } | |
2105 | ||
2106 | if (status & ATA_BUSY) { | |
2107 | printk(KERN_ERR "ata%u failed to respond (%lu secs)\n", | |
2108 | ap->id, tmout / HZ); | |
2109 | return 1; | |
2110 | } | |
2111 | ||
2112 | return 0; | |
2113 | } | |
2114 | ||
2115 | static void ata_bus_post_reset(struct ata_port *ap, unsigned int devmask) | |
2116 | { | |
2117 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2118 | unsigned int dev0 = devmask & (1 << 0); | |
2119 | unsigned int dev1 = devmask & (1 << 1); | |
2120 | unsigned long timeout; | |
2121 | ||
2122 | /* if device 0 was found in ata_devchk, wait for its | |
2123 | * BSY bit to clear | |
2124 | */ | |
2125 | if (dev0) | |
2126 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2127 | ||
2128 | /* if device 1 was found in ata_devchk, wait for | |
2129 | * register access, then wait for BSY to clear | |
2130 | */ | |
2131 | timeout = jiffies + ATA_TMOUT_BOOT; | |
2132 | while (dev1) { | |
2133 | u8 nsect, lbal; | |
2134 | ||
2135 | ap->ops->dev_select(ap, 1); | |
2136 | if (ap->flags & ATA_FLAG_MMIO) { | |
2137 | nsect = readb((void __iomem *) ioaddr->nsect_addr); | |
2138 | lbal = readb((void __iomem *) ioaddr->lbal_addr); | |
2139 | } else { | |
2140 | nsect = inb(ioaddr->nsect_addr); | |
2141 | lbal = inb(ioaddr->lbal_addr); | |
2142 | } | |
2143 | if ((nsect == 1) && (lbal == 1)) | |
2144 | break; | |
2145 | if (time_after(jiffies, timeout)) { | |
2146 | dev1 = 0; | |
2147 | break; | |
2148 | } | |
2149 | msleep(50); /* give drive a breather */ | |
2150 | } | |
2151 | if (dev1) | |
2152 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2153 | ||
2154 | /* is all this really necessary? */ | |
2155 | ap->ops->dev_select(ap, 0); | |
2156 | if (dev1) | |
2157 | ap->ops->dev_select(ap, 1); | |
2158 | if (dev0) | |
2159 | ap->ops->dev_select(ap, 0); | |
2160 | } | |
2161 | ||
1da177e4 LT |
2162 | static unsigned int ata_bus_softreset(struct ata_port *ap, |
2163 | unsigned int devmask) | |
2164 | { | |
2165 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2166 | ||
2167 | DPRINTK("ata%u: bus reset via SRST\n", ap->id); | |
2168 | ||
2169 | /* software reset. causes dev0 to be selected */ | |
2170 | if (ap->flags & ATA_FLAG_MMIO) { | |
2171 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2172 | udelay(20); /* FIXME: flush */ | |
2173 | writeb(ap->ctl | ATA_SRST, (void __iomem *) ioaddr->ctl_addr); | |
2174 | udelay(20); /* FIXME: flush */ | |
2175 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2176 | } else { | |
2177 | outb(ap->ctl, ioaddr->ctl_addr); | |
2178 | udelay(10); | |
2179 | outb(ap->ctl | ATA_SRST, ioaddr->ctl_addr); | |
2180 | udelay(10); | |
2181 | outb(ap->ctl, ioaddr->ctl_addr); | |
2182 | } | |
2183 | ||
2184 | /* spec mandates ">= 2ms" before checking status. | |
2185 | * We wait 150ms, because that was the magic delay used for | |
2186 | * ATAPI devices in Hale Landis's ATADRVR, for the period of time | |
2187 | * between when the ATA command register is written, and then | |
2188 | * status is checked. Because waiting for "a while" before | |
2189 | * checking status is fine, post SRST, we perform this magic | |
2190 | * delay here as well. | |
09c7ad79 AC |
2191 | * |
2192 | * Old drivers/ide uses the 2mS rule and then waits for ready | |
1da177e4 LT |
2193 | */ |
2194 | msleep(150); | |
2195 | ||
2e9edbf8 | 2196 | /* Before we perform post reset processing we want to see if |
298a41ca TH |
2197 | * the bus shows 0xFF because the odd clown forgets the D7 |
2198 | * pulldown resistor. | |
2199 | */ | |
09c7ad79 | 2200 | if (ata_check_status(ap) == 0xFF) |
298a41ca | 2201 | return AC_ERR_OTHER; |
09c7ad79 | 2202 | |
1da177e4 LT |
2203 | ata_bus_post_reset(ap, devmask); |
2204 | ||
2205 | return 0; | |
2206 | } | |
2207 | ||
2208 | /** | |
2209 | * ata_bus_reset - reset host port and associated ATA channel | |
2210 | * @ap: port to reset | |
2211 | * | |
2212 | * This is typically the first time we actually start issuing | |
2213 | * commands to the ATA channel. We wait for BSY to clear, then | |
2214 | * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its | |
2215 | * result. Determine what devices, if any, are on the channel | |
2216 | * by looking at the device 0/1 error register. Look at the signature | |
2217 | * stored in each device's taskfile registers, to determine if | |
2218 | * the device is ATA or ATAPI. | |
2219 | * | |
2220 | * LOCKING: | |
0cba632b JG |
2221 | * PCI/etc. bus probe sem. |
2222 | * Obtains host_set lock. | |
1da177e4 LT |
2223 | * |
2224 | * SIDE EFFECTS: | |
2225 | * Sets ATA_FLAG_PORT_DISABLED if bus reset fails. | |
2226 | */ | |
2227 | ||
2228 | void ata_bus_reset(struct ata_port *ap) | |
2229 | { | |
2230 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
2231 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2232 | u8 err; | |
aec5c3c1 | 2233 | unsigned int dev0, dev1 = 0, devmask = 0; |
1da177e4 LT |
2234 | |
2235 | DPRINTK("ENTER, host %u, port %u\n", ap->id, ap->port_no); | |
2236 | ||
2237 | /* determine if device 0/1 are present */ | |
2238 | if (ap->flags & ATA_FLAG_SATA_RESET) | |
2239 | dev0 = 1; | |
2240 | else { | |
2241 | dev0 = ata_devchk(ap, 0); | |
2242 | if (slave_possible) | |
2243 | dev1 = ata_devchk(ap, 1); | |
2244 | } | |
2245 | ||
2246 | if (dev0) | |
2247 | devmask |= (1 << 0); | |
2248 | if (dev1) | |
2249 | devmask |= (1 << 1); | |
2250 | ||
2251 | /* select device 0 again */ | |
2252 | ap->ops->dev_select(ap, 0); | |
2253 | ||
2254 | /* issue bus reset */ | |
2255 | if (ap->flags & ATA_FLAG_SRST) | |
aec5c3c1 TH |
2256 | if (ata_bus_softreset(ap, devmask)) |
2257 | goto err_out; | |
1da177e4 LT |
2258 | |
2259 | /* | |
2260 | * determine by signature whether we have ATA or ATAPI devices | |
2261 | */ | |
b4dc7623 | 2262 | ap->device[0].class = ata_dev_try_classify(ap, 0, &err); |
1da177e4 | 2263 | if ((slave_possible) && (err != 0x81)) |
b4dc7623 | 2264 | ap->device[1].class = ata_dev_try_classify(ap, 1, &err); |
1da177e4 LT |
2265 | |
2266 | /* re-enable interrupts */ | |
2267 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ | |
2268 | ata_irq_on(ap); | |
2269 | ||
2270 | /* is double-select really necessary? */ | |
2271 | if (ap->device[1].class != ATA_DEV_NONE) | |
2272 | ap->ops->dev_select(ap, 1); | |
2273 | if (ap->device[0].class != ATA_DEV_NONE) | |
2274 | ap->ops->dev_select(ap, 0); | |
2275 | ||
2276 | /* if no devices were detected, disable this port */ | |
2277 | if ((ap->device[0].class == ATA_DEV_NONE) && | |
2278 | (ap->device[1].class == ATA_DEV_NONE)) | |
2279 | goto err_out; | |
2280 | ||
2281 | if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) { | |
2282 | /* set up device control for ATA_FLAG_SATA_RESET */ | |
2283 | if (ap->flags & ATA_FLAG_MMIO) | |
2284 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
2285 | else | |
2286 | outb(ap->ctl, ioaddr->ctl_addr); | |
2287 | } | |
2288 | ||
2289 | DPRINTK("EXIT\n"); | |
2290 | return; | |
2291 | ||
2292 | err_out: | |
2293 | printk(KERN_ERR "ata%u: disabling port\n", ap->id); | |
2294 | ap->ops->port_disable(ap); | |
2295 | ||
2296 | DPRINTK("EXIT\n"); | |
2297 | } | |
2298 | ||
7a7921e8 TH |
2299 | static int sata_phy_resume(struct ata_port *ap) |
2300 | { | |
2301 | unsigned long timeout = jiffies + (HZ * 5); | |
852ee16a | 2302 | u32 scontrol, sstatus; |
7a7921e8 | 2303 | |
852ee16a TH |
2304 | scontrol = scr_read(ap, SCR_CONTROL); |
2305 | scontrol = (scontrol & 0x0f0) | 0x300; | |
2306 | scr_write_flush(ap, SCR_CONTROL, scontrol); | |
7a7921e8 TH |
2307 | |
2308 | /* Wait for phy to become ready, if necessary. */ | |
2309 | do { | |
2310 | msleep(200); | |
2311 | sstatus = scr_read(ap, SCR_STATUS); | |
2312 | if ((sstatus & 0xf) != 1) | |
2313 | return 0; | |
2314 | } while (time_before(jiffies, timeout)); | |
2315 | ||
2316 | return -1; | |
2317 | } | |
2318 | ||
8a19ac89 TH |
2319 | /** |
2320 | * ata_std_probeinit - initialize probing | |
2321 | * @ap: port to be probed | |
2322 | * | |
2323 | * @ap is about to be probed. Initialize it. This function is | |
2324 | * to be used as standard callback for ata_drive_probe_reset(). | |
3a39746a TH |
2325 | * |
2326 | * NOTE!!! Do not use this function as probeinit if a low level | |
2327 | * driver implements only hardreset. Just pass NULL as probeinit | |
2328 | * in that case. Using this function is probably okay but doing | |
2329 | * so makes reset sequence different from the original | |
2330 | * ->phy_reset implementation and Jeff nervous. :-P | |
8a19ac89 | 2331 | */ |
17efc5f7 | 2332 | void ata_std_probeinit(struct ata_port *ap) |
8a19ac89 | 2333 | { |
17efc5f7 | 2334 | if ((ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read) { |
1c3fae4d TH |
2335 | u32 spd; |
2336 | ||
8a19ac89 | 2337 | sata_phy_resume(ap); |
1c3fae4d TH |
2338 | |
2339 | spd = (scr_read(ap, SCR_CONTROL) & 0xf0) >> 4; | |
2340 | if (spd) | |
2341 | ap->sata_spd_limit &= (1 << spd) - 1; | |
2342 | ||
3a39746a TH |
2343 | if (sata_dev_present(ap)) |
2344 | ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT); | |
2345 | } | |
8a19ac89 TH |
2346 | } |
2347 | ||
c2bd5804 TH |
2348 | /** |
2349 | * ata_std_softreset - reset host port via ATA SRST | |
2350 | * @ap: port to reset | |
2351 | * @verbose: fail verbosely | |
2352 | * @classes: resulting classes of attached devices | |
2353 | * | |
2354 | * Reset host port using ATA SRST. This function is to be used | |
2355 | * as standard callback for ata_drive_*_reset() functions. | |
2356 | * | |
2357 | * LOCKING: | |
2358 | * Kernel thread context (may sleep) | |
2359 | * | |
2360 | * RETURNS: | |
2361 | * 0 on success, -errno otherwise. | |
2362 | */ | |
2363 | int ata_std_softreset(struct ata_port *ap, int verbose, unsigned int *classes) | |
2364 | { | |
2365 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; | |
2366 | unsigned int devmask = 0, err_mask; | |
2367 | u8 err; | |
2368 | ||
2369 | DPRINTK("ENTER\n"); | |
2370 | ||
3a39746a TH |
2371 | if (ap->ops->scr_read && !sata_dev_present(ap)) { |
2372 | classes[0] = ATA_DEV_NONE; | |
2373 | goto out; | |
2374 | } | |
2375 | ||
c2bd5804 TH |
2376 | /* determine if device 0/1 are present */ |
2377 | if (ata_devchk(ap, 0)) | |
2378 | devmask |= (1 << 0); | |
2379 | if (slave_possible && ata_devchk(ap, 1)) | |
2380 | devmask |= (1 << 1); | |
2381 | ||
c2bd5804 TH |
2382 | /* select device 0 again */ |
2383 | ap->ops->dev_select(ap, 0); | |
2384 | ||
2385 | /* issue bus reset */ | |
2386 | DPRINTK("about to softreset, devmask=%x\n", devmask); | |
2387 | err_mask = ata_bus_softreset(ap, devmask); | |
2388 | if (err_mask) { | |
2389 | if (verbose) | |
2390 | printk(KERN_ERR "ata%u: SRST failed (err_mask=0x%x)\n", | |
2391 | ap->id, err_mask); | |
2392 | else | |
2393 | DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n", | |
2394 | err_mask); | |
2395 | return -EIO; | |
2396 | } | |
2397 | ||
2398 | /* determine by signature whether we have ATA or ATAPI devices */ | |
2399 | classes[0] = ata_dev_try_classify(ap, 0, &err); | |
2400 | if (slave_possible && err != 0x81) | |
2401 | classes[1] = ata_dev_try_classify(ap, 1, &err); | |
2402 | ||
3a39746a | 2403 | out: |
c2bd5804 TH |
2404 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
2405 | return 0; | |
2406 | } | |
2407 | ||
2408 | /** | |
2409 | * sata_std_hardreset - reset host port via SATA phy reset | |
2410 | * @ap: port to reset | |
2411 | * @verbose: fail verbosely | |
2412 | * @class: resulting class of attached device | |
2413 | * | |
2414 | * SATA phy-reset host port using DET bits of SControl register. | |
2415 | * This function is to be used as standard callback for | |
2416 | * ata_drive_*_reset(). | |
2417 | * | |
2418 | * LOCKING: | |
2419 | * Kernel thread context (may sleep) | |
2420 | * | |
2421 | * RETURNS: | |
2422 | * 0 on success, -errno otherwise. | |
2423 | */ | |
2424 | int sata_std_hardreset(struct ata_port *ap, int verbose, unsigned int *class) | |
2425 | { | |
852ee16a TH |
2426 | u32 scontrol; |
2427 | ||
c2bd5804 TH |
2428 | DPRINTK("ENTER\n"); |
2429 | ||
1c3fae4d TH |
2430 | if (ata_set_sata_spd_needed(ap)) { |
2431 | /* SATA spec says nothing about how to reconfigure | |
2432 | * spd. To be on the safe side, turn off phy during | |
2433 | * reconfiguration. This works for at least ICH7 AHCI | |
2434 | * and Sil3124. | |
2435 | */ | |
2436 | scontrol = scr_read(ap, SCR_CONTROL); | |
2437 | scontrol = (scontrol & 0x0f0) | 0x302; | |
2438 | scr_write_flush(ap, SCR_CONTROL, scontrol); | |
2439 | ||
2440 | ata_set_sata_spd(ap); | |
2441 | } | |
2442 | ||
2443 | /* issue phy wake/reset */ | |
852ee16a TH |
2444 | scontrol = scr_read(ap, SCR_CONTROL); |
2445 | scontrol = (scontrol & 0x0f0) | 0x301; | |
2446 | scr_write_flush(ap, SCR_CONTROL, scontrol); | |
c2bd5804 | 2447 | |
1c3fae4d | 2448 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
2449 | * 10.4.2 says at least 1 ms. |
2450 | */ | |
2451 | msleep(1); | |
2452 | ||
1c3fae4d | 2453 | /* bring phy back */ |
7a7921e8 | 2454 | sata_phy_resume(ap); |
c2bd5804 | 2455 | |
c2bd5804 TH |
2456 | /* TODO: phy layer with polling, timeouts, etc. */ |
2457 | if (!sata_dev_present(ap)) { | |
2458 | *class = ATA_DEV_NONE; | |
2459 | DPRINTK("EXIT, link offline\n"); | |
2460 | return 0; | |
2461 | } | |
2462 | ||
2463 | if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) { | |
2464 | if (verbose) | |
2465 | printk(KERN_ERR "ata%u: COMRESET failed " | |
2466 | "(device not ready)\n", ap->id); | |
2467 | else | |
2468 | DPRINTK("EXIT, device not ready\n"); | |
2469 | return -EIO; | |
2470 | } | |
2471 | ||
3a39746a TH |
2472 | ap->ops->dev_select(ap, 0); /* probably unnecessary */ |
2473 | ||
c2bd5804 TH |
2474 | *class = ata_dev_try_classify(ap, 0, NULL); |
2475 | ||
2476 | DPRINTK("EXIT, class=%u\n", *class); | |
2477 | return 0; | |
2478 | } | |
2479 | ||
2480 | /** | |
2481 | * ata_std_postreset - standard postreset callback | |
2482 | * @ap: the target ata_port | |
2483 | * @classes: classes of attached devices | |
2484 | * | |
2485 | * This function is invoked after a successful reset. Note that | |
2486 | * the device might have been reset more than once using | |
2487 | * different reset methods before postreset is invoked. | |
c2bd5804 TH |
2488 | * |
2489 | * This function is to be used as standard callback for | |
2490 | * ata_drive_*_reset(). | |
2491 | * | |
2492 | * LOCKING: | |
2493 | * Kernel thread context (may sleep) | |
2494 | */ | |
2495 | void ata_std_postreset(struct ata_port *ap, unsigned int *classes) | |
2496 | { | |
2497 | DPRINTK("ENTER\n"); | |
2498 | ||
56497bd5 | 2499 | /* set cable type if it isn't already set */ |
c2bd5804 TH |
2500 | if (ap->cbl == ATA_CBL_NONE && ap->flags & ATA_FLAG_SATA) |
2501 | ap->cbl = ATA_CBL_SATA; | |
2502 | ||
2503 | /* print link status */ | |
2504 | if (ap->cbl == ATA_CBL_SATA) | |
2505 | sata_print_link_status(ap); | |
2506 | ||
3a39746a TH |
2507 | /* re-enable interrupts */ |
2508 | if (ap->ioaddr.ctl_addr) /* FIXME: hack. create a hook instead */ | |
2509 | ata_irq_on(ap); | |
c2bd5804 TH |
2510 | |
2511 | /* is double-select really necessary? */ | |
2512 | if (classes[0] != ATA_DEV_NONE) | |
2513 | ap->ops->dev_select(ap, 1); | |
2514 | if (classes[1] != ATA_DEV_NONE) | |
2515 | ap->ops->dev_select(ap, 0); | |
2516 | ||
3a39746a TH |
2517 | /* bail out if no device is present */ |
2518 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
2519 | DPRINTK("EXIT, no device\n"); | |
2520 | return; | |
2521 | } | |
2522 | ||
2523 | /* set up device control */ | |
2524 | if (ap->ioaddr.ctl_addr) { | |
2525 | if (ap->flags & ATA_FLAG_MMIO) | |
2526 | writeb(ap->ctl, (void __iomem *) ap->ioaddr.ctl_addr); | |
2527 | else | |
2528 | outb(ap->ctl, ap->ioaddr.ctl_addr); | |
2529 | } | |
c2bd5804 TH |
2530 | |
2531 | DPRINTK("EXIT\n"); | |
2532 | } | |
2533 | ||
2534 | /** | |
2535 | * ata_std_probe_reset - standard probe reset method | |
2536 | * @ap: prot to perform probe-reset | |
2537 | * @classes: resulting classes of attached devices | |
2538 | * | |
2539 | * The stock off-the-shelf ->probe_reset method. | |
2540 | * | |
2541 | * LOCKING: | |
2542 | * Kernel thread context (may sleep) | |
2543 | * | |
2544 | * RETURNS: | |
2545 | * 0 on success, -errno otherwise. | |
2546 | */ | |
2547 | int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes) | |
2548 | { | |
2549 | ata_reset_fn_t hardreset; | |
2550 | ||
2551 | hardreset = NULL; | |
b911fc3a | 2552 | if (ap->flags & ATA_FLAG_SATA && ap->ops->scr_read) |
c2bd5804 TH |
2553 | hardreset = sata_std_hardreset; |
2554 | ||
8a19ac89 | 2555 | return ata_drive_probe_reset(ap, ata_std_probeinit, |
7944ea95 | 2556 | ata_std_softreset, hardreset, |
c2bd5804 TH |
2557 | ata_std_postreset, classes); |
2558 | } | |
2559 | ||
9974e7cc TH |
2560 | static int ata_do_reset(struct ata_port *ap, |
2561 | ata_reset_fn_t reset, ata_postreset_fn_t postreset, | |
2562 | int verbose, unsigned int *classes) | |
a62c0fc5 TH |
2563 | { |
2564 | int i, rc; | |
2565 | ||
2566 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2567 | classes[i] = ATA_DEV_UNKNOWN; | |
2568 | ||
9974e7cc | 2569 | rc = reset(ap, verbose, classes); |
a62c0fc5 TH |
2570 | if (rc) |
2571 | return rc; | |
2572 | ||
2573 | /* If any class isn't ATA_DEV_UNKNOWN, consider classification | |
2574 | * is complete and convert all ATA_DEV_UNKNOWN to | |
2575 | * ATA_DEV_NONE. | |
2576 | */ | |
2577 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2578 | if (classes[i] != ATA_DEV_UNKNOWN) | |
2579 | break; | |
2580 | ||
2581 | if (i < ATA_MAX_DEVICES) | |
2582 | for (i = 0; i < ATA_MAX_DEVICES; i++) | |
2583 | if (classes[i] == ATA_DEV_UNKNOWN) | |
2584 | classes[i] = ATA_DEV_NONE; | |
2585 | ||
2586 | if (postreset) | |
2587 | postreset(ap, classes); | |
2588 | ||
9974e7cc | 2589 | return 0; |
a62c0fc5 TH |
2590 | } |
2591 | ||
2592 | /** | |
2593 | * ata_drive_probe_reset - Perform probe reset with given methods | |
2594 | * @ap: port to reset | |
7944ea95 | 2595 | * @probeinit: probeinit method (can be NULL) |
a62c0fc5 TH |
2596 | * @softreset: softreset method (can be NULL) |
2597 | * @hardreset: hardreset method (can be NULL) | |
2598 | * @postreset: postreset method (can be NULL) | |
2599 | * @classes: resulting classes of attached devices | |
2600 | * | |
2601 | * Reset the specified port and classify attached devices using | |
2602 | * given methods. This function prefers softreset but tries all | |
2603 | * possible reset sequences to reset and classify devices. This | |
2604 | * function is intended to be used for constructing ->probe_reset | |
2605 | * callback by low level drivers. | |
2606 | * | |
2607 | * Reset methods should follow the following rules. | |
2608 | * | |
2609 | * - Return 0 on sucess, -errno on failure. | |
2610 | * - If classification is supported, fill classes[] with | |
2611 | * recognized class codes. | |
2612 | * - If classification is not supported, leave classes[] alone. | |
2613 | * - If verbose is non-zero, print error message on failure; | |
2614 | * otherwise, shut up. | |
2615 | * | |
2616 | * LOCKING: | |
2617 | * Kernel thread context (may sleep) | |
2618 | * | |
2619 | * RETURNS: | |
2620 | * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV | |
2621 | * if classification fails, and any error code from reset | |
2622 | * methods. | |
2623 | */ | |
7944ea95 | 2624 | int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit, |
a62c0fc5 TH |
2625 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
2626 | ata_postreset_fn_t postreset, unsigned int *classes) | |
2627 | { | |
2628 | int rc = -EINVAL; | |
2629 | ||
7944ea95 TH |
2630 | if (probeinit) |
2631 | probeinit(ap); | |
2632 | ||
90dac02c | 2633 | if (softreset && !ata_set_sata_spd_needed(ap)) { |
9974e7cc TH |
2634 | rc = ata_do_reset(ap, softreset, postreset, 0, classes); |
2635 | if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN) | |
2636 | goto done; | |
edbabd86 TH |
2637 | printk(KERN_INFO "ata%u: softreset failed, will try " |
2638 | "hardreset in 5 secs\n", ap->id); | |
2639 | ssleep(5); | |
a62c0fc5 TH |
2640 | } |
2641 | ||
2642 | if (!hardreset) | |
9974e7cc | 2643 | goto done; |
a62c0fc5 | 2644 | |
90dac02c TH |
2645 | while (1) { |
2646 | rc = ata_do_reset(ap, hardreset, postreset, 0, classes); | |
2647 | if (rc == 0) { | |
2648 | if (classes[0] != ATA_DEV_UNKNOWN) | |
2649 | goto done; | |
2650 | break; | |
2651 | } | |
2652 | ||
2653 | if (ata_down_sata_spd_limit(ap)) | |
2654 | goto done; | |
edbabd86 TH |
2655 | |
2656 | printk(KERN_INFO "ata%u: hardreset failed, will retry " | |
2657 | "in 5 secs\n", ap->id); | |
2658 | ssleep(5); | |
90dac02c | 2659 | } |
a62c0fc5 | 2660 | |
edbabd86 TH |
2661 | if (softreset) { |
2662 | printk(KERN_INFO "ata%u: hardreset succeeded without " | |
2663 | "classification, will retry softreset in 5 secs\n", | |
2664 | ap->id); | |
2665 | ssleep(5); | |
2666 | ||
9974e7cc | 2667 | rc = ata_do_reset(ap, softreset, postreset, 0, classes); |
edbabd86 | 2668 | } |
a62c0fc5 | 2669 | |
9974e7cc TH |
2670 | done: |
2671 | if (rc == 0 && classes[0] == ATA_DEV_UNKNOWN) | |
2672 | rc = -ENODEV; | |
a62c0fc5 TH |
2673 | return rc; |
2674 | } | |
2675 | ||
623a3128 TH |
2676 | /** |
2677 | * ata_dev_same_device - Determine whether new ID matches configured device | |
2678 | * @ap: port on which the device to compare against resides | |
2679 | * @dev: device to compare against | |
2680 | * @new_class: class of the new device | |
2681 | * @new_id: IDENTIFY page of the new device | |
2682 | * | |
2683 | * Compare @new_class and @new_id against @dev and determine | |
2684 | * whether @dev is the device indicated by @new_class and | |
2685 | * @new_id. | |
2686 | * | |
2687 | * LOCKING: | |
2688 | * None. | |
2689 | * | |
2690 | * RETURNS: | |
2691 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
2692 | */ | |
2693 | static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev, | |
2694 | unsigned int new_class, const u16 *new_id) | |
2695 | { | |
2696 | const u16 *old_id = dev->id; | |
2697 | unsigned char model[2][41], serial[2][21]; | |
2698 | u64 new_n_sectors; | |
2699 | ||
2700 | if (dev->class != new_class) { | |
2701 | printk(KERN_INFO | |
2702 | "ata%u: dev %u class mismatch %d != %d\n", | |
2703 | ap->id, dev->devno, dev->class, new_class); | |
2704 | return 0; | |
2705 | } | |
2706 | ||
2707 | ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0])); | |
2708 | ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1])); | |
2709 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0])); | |
2710 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1])); | |
2711 | new_n_sectors = ata_id_n_sectors(new_id); | |
2712 | ||
2713 | if (strcmp(model[0], model[1])) { | |
2714 | printk(KERN_INFO | |
2715 | "ata%u: dev %u model number mismatch '%s' != '%s'\n", | |
2716 | ap->id, dev->devno, model[0], model[1]); | |
2717 | return 0; | |
2718 | } | |
2719 | ||
2720 | if (strcmp(serial[0], serial[1])) { | |
2721 | printk(KERN_INFO | |
2722 | "ata%u: dev %u serial number mismatch '%s' != '%s'\n", | |
2723 | ap->id, dev->devno, serial[0], serial[1]); | |
2724 | return 0; | |
2725 | } | |
2726 | ||
2727 | if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) { | |
2728 | printk(KERN_INFO | |
2729 | "ata%u: dev %u n_sectors mismatch %llu != %llu\n", | |
2730 | ap->id, dev->devno, (unsigned long long)dev->n_sectors, | |
2731 | (unsigned long long)new_n_sectors); | |
2732 | return 0; | |
2733 | } | |
2734 | ||
2735 | return 1; | |
2736 | } | |
2737 | ||
2738 | /** | |
2739 | * ata_dev_revalidate - Revalidate ATA device | |
2740 | * @ap: port on which the device to revalidate resides | |
2741 | * @dev: device to revalidate | |
2742 | * @post_reset: is this revalidation after reset? | |
2743 | * | |
2744 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
2745 | * the port. | |
2746 | * | |
2747 | * LOCKING: | |
2748 | * Kernel thread context (may sleep) | |
2749 | * | |
2750 | * RETURNS: | |
2751 | * 0 on success, negative errno otherwise | |
2752 | */ | |
2753 | int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev, | |
2754 | int post_reset) | |
2755 | { | |
2756 | unsigned int class; | |
2757 | u16 *id; | |
2758 | int rc; | |
2759 | ||
e1211e3f | 2760 | if (!ata_dev_enabled(dev)) |
623a3128 TH |
2761 | return -ENODEV; |
2762 | ||
2763 | class = dev->class; | |
2764 | id = NULL; | |
2765 | ||
2766 | /* allocate & read ID data */ | |
2767 | rc = ata_dev_read_id(ap, dev, &class, post_reset, &id); | |
2768 | if (rc) | |
2769 | goto fail; | |
2770 | ||
2771 | /* is the device still there? */ | |
2772 | if (!ata_dev_same_device(ap, dev, class, id)) { | |
2773 | rc = -ENODEV; | |
2774 | goto fail; | |
2775 | } | |
2776 | ||
2777 | kfree(dev->id); | |
2778 | dev->id = id; | |
2779 | ||
2780 | /* configure device according to the new ID */ | |
2781 | return ata_dev_configure(ap, dev, 0); | |
2782 | ||
2783 | fail: | |
2784 | printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n", | |
2785 | ap->id, dev->devno, rc); | |
2786 | kfree(id); | |
2787 | return rc; | |
2788 | } | |
2789 | ||
98ac62de | 2790 | static const char * const ata_dma_blacklist [] = { |
f4b15fef AC |
2791 | "WDC AC11000H", NULL, |
2792 | "WDC AC22100H", NULL, | |
2793 | "WDC AC32500H", NULL, | |
2794 | "WDC AC33100H", NULL, | |
2795 | "WDC AC31600H", NULL, | |
2796 | "WDC AC32100H", "24.09P07", | |
2797 | "WDC AC23200L", "21.10N21", | |
2798 | "Compaq CRD-8241B", NULL, | |
2799 | "CRD-8400B", NULL, | |
2800 | "CRD-8480B", NULL, | |
2801 | "CRD-8482B", NULL, | |
2802 | "CRD-84", NULL, | |
2803 | "SanDisk SDP3B", NULL, | |
2804 | "SanDisk SDP3B-64", NULL, | |
2805 | "SANYO CD-ROM CRD", NULL, | |
2806 | "HITACHI CDR-8", NULL, | |
2e9edbf8 | 2807 | "HITACHI CDR-8335", NULL, |
f4b15fef | 2808 | "HITACHI CDR-8435", NULL, |
2e9edbf8 JG |
2809 | "Toshiba CD-ROM XM-6202B", NULL, |
2810 | "TOSHIBA CD-ROM XM-1702BC", NULL, | |
2811 | "CD-532E-A", NULL, | |
2812 | "E-IDE CD-ROM CR-840", NULL, | |
2813 | "CD-ROM Drive/F5A", NULL, | |
2814 | "WPI CDD-820", NULL, | |
f4b15fef | 2815 | "SAMSUNG CD-ROM SC-148C", NULL, |
2e9edbf8 | 2816 | "SAMSUNG CD-ROM SC", NULL, |
f4b15fef AC |
2817 | "SanDisk SDP3B-64", NULL, |
2818 | "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL, | |
2819 | "_NEC DV5800A", NULL, | |
2820 | "SAMSUNG CD-ROM SN-124", "N001" | |
1da177e4 | 2821 | }; |
2e9edbf8 | 2822 | |
f4b15fef AC |
2823 | static int ata_strim(char *s, size_t len) |
2824 | { | |
2825 | len = strnlen(s, len); | |
2826 | ||
2827 | /* ATAPI specifies that empty space is blank-filled; remove blanks */ | |
2828 | while ((len > 0) && (s[len - 1] == ' ')) { | |
2829 | len--; | |
2830 | s[len] = 0; | |
2831 | } | |
2832 | return len; | |
2833 | } | |
1da177e4 | 2834 | |
057ace5e | 2835 | static int ata_dma_blacklisted(const struct ata_device *dev) |
1da177e4 | 2836 | { |
f4b15fef AC |
2837 | unsigned char model_num[40]; |
2838 | unsigned char model_rev[16]; | |
2839 | unsigned int nlen, rlen; | |
1da177e4 LT |
2840 | int i; |
2841 | ||
f4b15fef AC |
2842 | ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS, |
2843 | sizeof(model_num)); | |
2844 | ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS, | |
2845 | sizeof(model_rev)); | |
2846 | nlen = ata_strim(model_num, sizeof(model_num)); | |
2847 | rlen = ata_strim(model_rev, sizeof(model_rev)); | |
1da177e4 | 2848 | |
f4b15fef AC |
2849 | for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) { |
2850 | if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) { | |
2851 | if (ata_dma_blacklist[i+1] == NULL) | |
2852 | return 1; | |
2853 | if (!strncmp(ata_dma_blacklist[i], model_rev, rlen)) | |
2854 | return 1; | |
2855 | } | |
2856 | } | |
1da177e4 LT |
2857 | return 0; |
2858 | } | |
2859 | ||
a6d5a51c TH |
2860 | /** |
2861 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
2862 | * @ap: Port on which the device to compute xfermask for resides | |
2863 | * @dev: Device to compute xfermask for | |
2864 | * | |
acf356b1 TH |
2865 | * Compute supported xfermask of @dev and store it in |
2866 | * dev->*_mask. This function is responsible for applying all | |
2867 | * known limits including host controller limits, device | |
2868 | * blacklist, etc... | |
a6d5a51c | 2869 | * |
600511e8 TH |
2870 | * FIXME: The current implementation limits all transfer modes to |
2871 | * the fastest of the lowested device on the port. This is not | |
05c8e0ac | 2872 | * required on most controllers. |
600511e8 | 2873 | * |
a6d5a51c TH |
2874 | * LOCKING: |
2875 | * None. | |
a6d5a51c | 2876 | */ |
acf356b1 | 2877 | static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev) |
1da177e4 | 2878 | { |
5444a6f4 | 2879 | struct ata_host_set *hs = ap->host_set; |
a6d5a51c TH |
2880 | unsigned long xfer_mask; |
2881 | int i; | |
1da177e4 | 2882 | |
a6d5a51c TH |
2883 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
2884 | ap->udma_mask); | |
1da177e4 | 2885 | |
5444a6f4 | 2886 | /* FIXME: Use port-wide xfermask for now */ |
a6d5a51c TH |
2887 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
2888 | struct ata_device *d = &ap->device[i]; | |
e1211e3f | 2889 | if (!ata_dev_enabled(d)) |
a6d5a51c | 2890 | continue; |
acf356b1 TH |
2891 | xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask, |
2892 | d->udma_mask); | |
a6d5a51c TH |
2893 | xfer_mask &= ata_id_xfermask(d->id); |
2894 | if (ata_dma_blacklisted(d)) | |
2895 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
5444a6f4 AC |
2896 | /* Apply cable rule here. Don't apply it early because when |
2897 | we handle hot plug the cable type can itself change */ | |
2898 | if (ap->cbl == ATA_CBL_PATA40) | |
2899 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
1da177e4 LT |
2900 | } |
2901 | ||
a6d5a51c TH |
2902 | if (ata_dma_blacklisted(dev)) |
2903 | printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, " | |
2904 | "disabling DMA\n", ap->id, dev->devno); | |
2905 | ||
5444a6f4 AC |
2906 | if (hs->flags & ATA_HOST_SIMPLEX) { |
2907 | if (hs->simplex_claimed) | |
2908 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
2909 | } | |
2910 | if (ap->ops->mode_filter) | |
2911 | xfer_mask = ap->ops->mode_filter(ap, dev, xfer_mask); | |
2912 | ||
acf356b1 TH |
2913 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, |
2914 | &dev->udma_mask); | |
1da177e4 LT |
2915 | } |
2916 | ||
1da177e4 LT |
2917 | /** |
2918 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
2919 | * @ap: Port associated with device @dev | |
2920 | * @dev: Device to which command will be sent | |
2921 | * | |
780a87f7 JG |
2922 | * Issue SET FEATURES - XFER MODE command to device @dev |
2923 | * on port @ap. | |
2924 | * | |
1da177e4 | 2925 | * LOCKING: |
0cba632b | 2926 | * PCI/etc. bus probe sem. |
83206a29 TH |
2927 | * |
2928 | * RETURNS: | |
2929 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
2930 | */ |
2931 | ||
83206a29 TH |
2932 | static unsigned int ata_dev_set_xfermode(struct ata_port *ap, |
2933 | struct ata_device *dev) | |
1da177e4 | 2934 | { |
a0123703 | 2935 | struct ata_taskfile tf; |
83206a29 | 2936 | unsigned int err_mask; |
1da177e4 LT |
2937 | |
2938 | /* set up set-features taskfile */ | |
2939 | DPRINTK("set features - xfer mode\n"); | |
2940 | ||
a0123703 TH |
2941 | ata_tf_init(ap, &tf, dev->devno); |
2942 | tf.command = ATA_CMD_SET_FEATURES; | |
2943 | tf.feature = SETFEATURES_XFER; | |
2944 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2945 | tf.protocol = ATA_PROT_NODATA; | |
2946 | tf.nsect = dev->xfer_mode; | |
1da177e4 | 2947 | |
83206a29 | 2948 | err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); |
1da177e4 | 2949 | |
83206a29 TH |
2950 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
2951 | return err_mask; | |
1da177e4 LT |
2952 | } |
2953 | ||
8bf62ece AL |
2954 | /** |
2955 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
2956 | * @ap: Port associated with device @dev | |
2957 | * @dev: Device to which command will be sent | |
2958 | * | |
2959 | * LOCKING: | |
6aff8f1f TH |
2960 | * Kernel thread context (may sleep) |
2961 | * | |
2962 | * RETURNS: | |
2963 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece AL |
2964 | */ |
2965 | ||
6aff8f1f | 2966 | static unsigned int ata_dev_init_params(struct ata_port *ap, |
00b6f5e9 AL |
2967 | struct ata_device *dev, |
2968 | u16 heads, | |
2969 | u16 sectors) | |
8bf62ece | 2970 | { |
a0123703 | 2971 | struct ata_taskfile tf; |
6aff8f1f | 2972 | unsigned int err_mask; |
8bf62ece AL |
2973 | |
2974 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
2975 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 2976 | return AC_ERR_INVALID; |
8bf62ece AL |
2977 | |
2978 | /* set up init dev params taskfile */ | |
2979 | DPRINTK("init dev params \n"); | |
2980 | ||
a0123703 TH |
2981 | ata_tf_init(ap, &tf, dev->devno); |
2982 | tf.command = ATA_CMD_INIT_DEV_PARAMS; | |
2983 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
2984 | tf.protocol = ATA_PROT_NODATA; | |
2985 | tf.nsect = sectors; | |
2986 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 2987 | |
6aff8f1f | 2988 | err_mask = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); |
8bf62ece | 2989 | |
6aff8f1f TH |
2990 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
2991 | return err_mask; | |
8bf62ece AL |
2992 | } |
2993 | ||
1da177e4 | 2994 | /** |
0cba632b JG |
2995 | * ata_sg_clean - Unmap DMA memory associated with command |
2996 | * @qc: Command containing DMA memory to be released | |
2997 | * | |
2998 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
2999 | * |
3000 | * LOCKING: | |
0cba632b | 3001 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
3002 | */ |
3003 | ||
3004 | static void ata_sg_clean(struct ata_queued_cmd *qc) | |
3005 | { | |
3006 | struct ata_port *ap = qc->ap; | |
cedc9a47 | 3007 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3008 | int dir = qc->dma_dir; |
cedc9a47 | 3009 | void *pad_buf = NULL; |
1da177e4 | 3010 | |
a4631474 TH |
3011 | WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); |
3012 | WARN_ON(sg == NULL); | |
1da177e4 LT |
3013 | |
3014 | if (qc->flags & ATA_QCFLAG_SINGLE) | |
f131883e | 3015 | WARN_ON(qc->n_elem > 1); |
1da177e4 | 3016 | |
2c13b7ce | 3017 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 3018 | |
cedc9a47 JG |
3019 | /* if we padded the buffer out to 32-bit bound, and data |
3020 | * xfer direction is from-device, we must copy from the | |
3021 | * pad buffer back into the supplied buffer | |
3022 | */ | |
3023 | if (qc->pad_len && !(qc->tf.flags & ATA_TFLAG_WRITE)) | |
3024 | pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3025 | ||
3026 | if (qc->flags & ATA_QCFLAG_SG) { | |
e1410f2d | 3027 | if (qc->n_elem) |
2f1f610b | 3028 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
cedc9a47 JG |
3029 | /* restore last sg */ |
3030 | sg[qc->orig_n_elem - 1].length += qc->pad_len; | |
3031 | if (pad_buf) { | |
3032 | struct scatterlist *psg = &qc->pad_sgent; | |
3033 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3034 | memcpy(addr + psg->offset, pad_buf, qc->pad_len); | |
dfa15988 | 3035 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3036 | } |
3037 | } else { | |
2e242fa9 | 3038 | if (qc->n_elem) |
2f1f610b | 3039 | dma_unmap_single(ap->dev, |
e1410f2d JG |
3040 | sg_dma_address(&sg[0]), sg_dma_len(&sg[0]), |
3041 | dir); | |
cedc9a47 JG |
3042 | /* restore sg */ |
3043 | sg->length += qc->pad_len; | |
3044 | if (pad_buf) | |
3045 | memcpy(qc->buf_virt + sg->length - qc->pad_len, | |
3046 | pad_buf, qc->pad_len); | |
3047 | } | |
1da177e4 LT |
3048 | |
3049 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
cedc9a47 | 3050 | qc->__sg = NULL; |
1da177e4 LT |
3051 | } |
3052 | ||
3053 | /** | |
3054 | * ata_fill_sg - Fill PCI IDE PRD table | |
3055 | * @qc: Metadata associated with taskfile to be transferred | |
3056 | * | |
780a87f7 JG |
3057 | * Fill PCI IDE PRD (scatter-gather) table with segments |
3058 | * associated with the current disk command. | |
3059 | * | |
1da177e4 | 3060 | * LOCKING: |
780a87f7 | 3061 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
3062 | * |
3063 | */ | |
3064 | static void ata_fill_sg(struct ata_queued_cmd *qc) | |
3065 | { | |
1da177e4 | 3066 | struct ata_port *ap = qc->ap; |
cedc9a47 JG |
3067 | struct scatterlist *sg; |
3068 | unsigned int idx; | |
1da177e4 | 3069 | |
a4631474 | 3070 | WARN_ON(qc->__sg == NULL); |
f131883e | 3071 | WARN_ON(qc->n_elem == 0 && qc->pad_len == 0); |
1da177e4 LT |
3072 | |
3073 | idx = 0; | |
cedc9a47 | 3074 | ata_for_each_sg(sg, qc) { |
1da177e4 LT |
3075 | u32 addr, offset; |
3076 | u32 sg_len, len; | |
3077 | ||
3078 | /* determine if physical DMA addr spans 64K boundary. | |
3079 | * Note h/w doesn't support 64-bit, so we unconditionally | |
3080 | * truncate dma_addr_t to u32. | |
3081 | */ | |
3082 | addr = (u32) sg_dma_address(sg); | |
3083 | sg_len = sg_dma_len(sg); | |
3084 | ||
3085 | while (sg_len) { | |
3086 | offset = addr & 0xffff; | |
3087 | len = sg_len; | |
3088 | if ((offset + sg_len) > 0x10000) | |
3089 | len = 0x10000 - offset; | |
3090 | ||
3091 | ap->prd[idx].addr = cpu_to_le32(addr); | |
3092 | ap->prd[idx].flags_len = cpu_to_le32(len & 0xffff); | |
3093 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len); | |
3094 | ||
3095 | idx++; | |
3096 | sg_len -= len; | |
3097 | addr += len; | |
3098 | } | |
3099 | } | |
3100 | ||
3101 | if (idx) | |
3102 | ap->prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); | |
3103 | } | |
3104 | /** | |
3105 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
3106 | * @qc: Metadata associated with taskfile to check | |
3107 | * | |
780a87f7 JG |
3108 | * Allow low-level driver to filter ATA PACKET commands, returning |
3109 | * a status indicating whether or not it is OK to use DMA for the | |
3110 | * supplied PACKET command. | |
3111 | * | |
1da177e4 | 3112 | * LOCKING: |
0cba632b JG |
3113 | * spin_lock_irqsave(host_set lock) |
3114 | * | |
1da177e4 LT |
3115 | * RETURNS: 0 when ATAPI DMA can be used |
3116 | * nonzero otherwise | |
3117 | */ | |
3118 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
3119 | { | |
3120 | struct ata_port *ap = qc->ap; | |
3121 | int rc = 0; /* Assume ATAPI DMA is OK by default */ | |
3122 | ||
3123 | if (ap->ops->check_atapi_dma) | |
3124 | rc = ap->ops->check_atapi_dma(qc); | |
3125 | ||
3126 | return rc; | |
3127 | } | |
3128 | /** | |
3129 | * ata_qc_prep - Prepare taskfile for submission | |
3130 | * @qc: Metadata associated with taskfile to be prepared | |
3131 | * | |
780a87f7 JG |
3132 | * Prepare ATA taskfile for submission. |
3133 | * | |
1da177e4 LT |
3134 | * LOCKING: |
3135 | * spin_lock_irqsave(host_set lock) | |
3136 | */ | |
3137 | void ata_qc_prep(struct ata_queued_cmd *qc) | |
3138 | { | |
3139 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) | |
3140 | return; | |
3141 | ||
3142 | ata_fill_sg(qc); | |
3143 | } | |
3144 | ||
e46834cd BK |
3145 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
3146 | ||
0cba632b JG |
3147 | /** |
3148 | * ata_sg_init_one - Associate command with memory buffer | |
3149 | * @qc: Command to be associated | |
3150 | * @buf: Memory buffer | |
3151 | * @buflen: Length of memory buffer, in bytes. | |
3152 | * | |
3153 | * Initialize the data-related elements of queued_cmd @qc | |
3154 | * to point to a single memory buffer, @buf of byte length @buflen. | |
3155 | * | |
3156 | * LOCKING: | |
3157 | * spin_lock_irqsave(host_set lock) | |
3158 | */ | |
3159 | ||
1da177e4 LT |
3160 | void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) |
3161 | { | |
3162 | struct scatterlist *sg; | |
3163 | ||
3164 | qc->flags |= ATA_QCFLAG_SINGLE; | |
3165 | ||
3166 | memset(&qc->sgent, 0, sizeof(qc->sgent)); | |
cedc9a47 | 3167 | qc->__sg = &qc->sgent; |
1da177e4 | 3168 | qc->n_elem = 1; |
cedc9a47 | 3169 | qc->orig_n_elem = 1; |
1da177e4 LT |
3170 | qc->buf_virt = buf; |
3171 | ||
cedc9a47 | 3172 | sg = qc->__sg; |
f0612bbc | 3173 | sg_init_one(sg, buf, buflen); |
1da177e4 LT |
3174 | } |
3175 | ||
0cba632b JG |
3176 | /** |
3177 | * ata_sg_init - Associate command with scatter-gather table. | |
3178 | * @qc: Command to be associated | |
3179 | * @sg: Scatter-gather table. | |
3180 | * @n_elem: Number of elements in s/g table. | |
3181 | * | |
3182 | * Initialize the data-related elements of queued_cmd @qc | |
3183 | * to point to a scatter-gather table @sg, containing @n_elem | |
3184 | * elements. | |
3185 | * | |
3186 | * LOCKING: | |
3187 | * spin_lock_irqsave(host_set lock) | |
3188 | */ | |
3189 | ||
1da177e4 LT |
3190 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
3191 | unsigned int n_elem) | |
3192 | { | |
3193 | qc->flags |= ATA_QCFLAG_SG; | |
cedc9a47 | 3194 | qc->__sg = sg; |
1da177e4 | 3195 | qc->n_elem = n_elem; |
cedc9a47 | 3196 | qc->orig_n_elem = n_elem; |
1da177e4 LT |
3197 | } |
3198 | ||
3199 | /** | |
0cba632b JG |
3200 | * ata_sg_setup_one - DMA-map the memory buffer associated with a command. |
3201 | * @qc: Command with memory buffer to be mapped. | |
3202 | * | |
3203 | * DMA-map the memory buffer associated with queued_cmd @qc. | |
1da177e4 LT |
3204 | * |
3205 | * LOCKING: | |
3206 | * spin_lock_irqsave(host_set lock) | |
3207 | * | |
3208 | * RETURNS: | |
0cba632b | 3209 | * Zero on success, negative on error. |
1da177e4 LT |
3210 | */ |
3211 | ||
3212 | static int ata_sg_setup_one(struct ata_queued_cmd *qc) | |
3213 | { | |
3214 | struct ata_port *ap = qc->ap; | |
3215 | int dir = qc->dma_dir; | |
cedc9a47 | 3216 | struct scatterlist *sg = qc->__sg; |
1da177e4 | 3217 | dma_addr_t dma_address; |
2e242fa9 | 3218 | int trim_sg = 0; |
1da177e4 | 3219 | |
cedc9a47 JG |
3220 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3221 | qc->pad_len = sg->length & 3; | |
3222 | if (qc->pad_len) { | |
3223 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3224 | struct scatterlist *psg = &qc->pad_sgent; | |
3225 | ||
a4631474 | 3226 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3227 | |
3228 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3229 | ||
3230 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
3231 | memcpy(pad_buf, qc->buf_virt + sg->length - qc->pad_len, | |
3232 | qc->pad_len); | |
3233 | ||
3234 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3235 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3236 | /* trim sg */ | |
3237 | sg->length -= qc->pad_len; | |
2e242fa9 TH |
3238 | if (sg->length == 0) |
3239 | trim_sg = 1; | |
cedc9a47 JG |
3240 | |
3241 | DPRINTK("padding done, sg->length=%u pad_len=%u\n", | |
3242 | sg->length, qc->pad_len); | |
3243 | } | |
3244 | ||
2e242fa9 TH |
3245 | if (trim_sg) { |
3246 | qc->n_elem--; | |
e1410f2d JG |
3247 | goto skip_map; |
3248 | } | |
3249 | ||
2f1f610b | 3250 | dma_address = dma_map_single(ap->dev, qc->buf_virt, |
32529e01 | 3251 | sg->length, dir); |
537a95d9 TH |
3252 | if (dma_mapping_error(dma_address)) { |
3253 | /* restore sg */ | |
3254 | sg->length += qc->pad_len; | |
1da177e4 | 3255 | return -1; |
537a95d9 | 3256 | } |
1da177e4 LT |
3257 | |
3258 | sg_dma_address(sg) = dma_address; | |
32529e01 | 3259 | sg_dma_len(sg) = sg->length; |
1da177e4 | 3260 | |
2e242fa9 | 3261 | skip_map: |
1da177e4 LT |
3262 | DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg), |
3263 | qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3264 | ||
3265 | return 0; | |
3266 | } | |
3267 | ||
3268 | /** | |
0cba632b JG |
3269 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
3270 | * @qc: Command with scatter-gather table to be mapped. | |
3271 | * | |
3272 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
1da177e4 LT |
3273 | * |
3274 | * LOCKING: | |
3275 | * spin_lock_irqsave(host_set lock) | |
3276 | * | |
3277 | * RETURNS: | |
0cba632b | 3278 | * Zero on success, negative on error. |
1da177e4 LT |
3279 | * |
3280 | */ | |
3281 | ||
3282 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
3283 | { | |
3284 | struct ata_port *ap = qc->ap; | |
cedc9a47 JG |
3285 | struct scatterlist *sg = qc->__sg; |
3286 | struct scatterlist *lsg = &sg[qc->n_elem - 1]; | |
e1410f2d | 3287 | int n_elem, pre_n_elem, dir, trim_sg = 0; |
1da177e4 LT |
3288 | |
3289 | VPRINTK("ENTER, ata%u\n", ap->id); | |
a4631474 | 3290 | WARN_ON(!(qc->flags & ATA_QCFLAG_SG)); |
1da177e4 | 3291 | |
cedc9a47 JG |
3292 | /* we must lengthen transfers to end on a 32-bit boundary */ |
3293 | qc->pad_len = lsg->length & 3; | |
3294 | if (qc->pad_len) { | |
3295 | void *pad_buf = ap->pad + (qc->tag * ATA_DMA_PAD_SZ); | |
3296 | struct scatterlist *psg = &qc->pad_sgent; | |
3297 | unsigned int offset; | |
3298 | ||
a4631474 | 3299 | WARN_ON(qc->dev->class != ATA_DEV_ATAPI); |
cedc9a47 JG |
3300 | |
3301 | memset(pad_buf, 0, ATA_DMA_PAD_SZ); | |
3302 | ||
3303 | /* | |
3304 | * psg->page/offset are used to copy to-be-written | |
3305 | * data in this function or read data in ata_sg_clean. | |
3306 | */ | |
3307 | offset = lsg->offset + lsg->length - qc->pad_len; | |
3308 | psg->page = nth_page(lsg->page, offset >> PAGE_SHIFT); | |
3309 | psg->offset = offset_in_page(offset); | |
3310 | ||
3311 | if (qc->tf.flags & ATA_TFLAG_WRITE) { | |
3312 | void *addr = kmap_atomic(psg->page, KM_IRQ0); | |
3313 | memcpy(pad_buf, addr + psg->offset, qc->pad_len); | |
dfa15988 | 3314 | kunmap_atomic(addr, KM_IRQ0); |
cedc9a47 JG |
3315 | } |
3316 | ||
3317 | sg_dma_address(psg) = ap->pad_dma + (qc->tag * ATA_DMA_PAD_SZ); | |
3318 | sg_dma_len(psg) = ATA_DMA_PAD_SZ; | |
3319 | /* trim last sg */ | |
3320 | lsg->length -= qc->pad_len; | |
e1410f2d JG |
3321 | if (lsg->length == 0) |
3322 | trim_sg = 1; | |
cedc9a47 JG |
3323 | |
3324 | DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n", | |
3325 | qc->n_elem - 1, lsg->length, qc->pad_len); | |
3326 | } | |
3327 | ||
e1410f2d JG |
3328 | pre_n_elem = qc->n_elem; |
3329 | if (trim_sg && pre_n_elem) | |
3330 | pre_n_elem--; | |
3331 | ||
3332 | if (!pre_n_elem) { | |
3333 | n_elem = 0; | |
3334 | goto skip_map; | |
3335 | } | |
3336 | ||
1da177e4 | 3337 | dir = qc->dma_dir; |
2f1f610b | 3338 | n_elem = dma_map_sg(ap->dev, sg, pre_n_elem, dir); |
537a95d9 TH |
3339 | if (n_elem < 1) { |
3340 | /* restore last sg */ | |
3341 | lsg->length += qc->pad_len; | |
1da177e4 | 3342 | return -1; |
537a95d9 | 3343 | } |
1da177e4 LT |
3344 | |
3345 | DPRINTK("%d sg elements mapped\n", n_elem); | |
3346 | ||
e1410f2d | 3347 | skip_map: |
1da177e4 LT |
3348 | qc->n_elem = n_elem; |
3349 | ||
3350 | return 0; | |
3351 | } | |
3352 | ||
40e8c82c TH |
3353 | /** |
3354 | * ata_poll_qc_complete - turn irq back on and finish qc | |
3355 | * @qc: Command to complete | |
8e8b77dd | 3356 | * @err_mask: ATA status register content |
40e8c82c TH |
3357 | * |
3358 | * LOCKING: | |
3359 | * None. (grabs host lock) | |
3360 | */ | |
3361 | ||
a22e2eb0 | 3362 | void ata_poll_qc_complete(struct ata_queued_cmd *qc) |
40e8c82c TH |
3363 | { |
3364 | struct ata_port *ap = qc->ap; | |
b8f6153e | 3365 | unsigned long flags; |
40e8c82c | 3366 | |
b8f6153e | 3367 | spin_lock_irqsave(&ap->host_set->lock, flags); |
40e8c82c TH |
3368 | ap->flags &= ~ATA_FLAG_NOINTR; |
3369 | ata_irq_on(ap); | |
a22e2eb0 | 3370 | ata_qc_complete(qc); |
b8f6153e | 3371 | spin_unlock_irqrestore(&ap->host_set->lock, flags); |
40e8c82c TH |
3372 | } |
3373 | ||
1da177e4 | 3374 | /** |
c893a3ae | 3375 | * ata_pio_poll - poll using PIO, depending on current state |
6f0ef4fa | 3376 | * @ap: the target ata_port |
1da177e4 LT |
3377 | * |
3378 | * LOCKING: | |
0cba632b | 3379 | * None. (executing in kernel thread context) |
1da177e4 LT |
3380 | * |
3381 | * RETURNS: | |
6f0ef4fa | 3382 | * timeout value to use |
1da177e4 LT |
3383 | */ |
3384 | ||
3385 | static unsigned long ata_pio_poll(struct ata_port *ap) | |
3386 | { | |
c14b8331 | 3387 | struct ata_queued_cmd *qc; |
1da177e4 | 3388 | u8 status; |
14be71f4 AL |
3389 | unsigned int poll_state = HSM_ST_UNKNOWN; |
3390 | unsigned int reg_state = HSM_ST_UNKNOWN; | |
14be71f4 | 3391 | |
c14b8331 | 3392 | qc = ata_qc_from_tag(ap, ap->active_tag); |
a4631474 | 3393 | WARN_ON(qc == NULL); |
c14b8331 | 3394 | |
14be71f4 AL |
3395 | switch (ap->hsm_task_state) { |
3396 | case HSM_ST: | |
3397 | case HSM_ST_POLL: | |
3398 | poll_state = HSM_ST_POLL; | |
3399 | reg_state = HSM_ST; | |
1da177e4 | 3400 | break; |
14be71f4 AL |
3401 | case HSM_ST_LAST: |
3402 | case HSM_ST_LAST_POLL: | |
3403 | poll_state = HSM_ST_LAST_POLL; | |
3404 | reg_state = HSM_ST_LAST; | |
1da177e4 LT |
3405 | break; |
3406 | default: | |
3407 | BUG(); | |
3408 | break; | |
3409 | } | |
3410 | ||
3411 | status = ata_chk_status(ap); | |
3412 | if (status & ATA_BUSY) { | |
3413 | if (time_after(jiffies, ap->pio_task_timeout)) { | |
11a56d24 | 3414 | qc->err_mask |= AC_ERR_TIMEOUT; |
7c398335 | 3415 | ap->hsm_task_state = HSM_ST_TMOUT; |
1da177e4 LT |
3416 | return 0; |
3417 | } | |
14be71f4 | 3418 | ap->hsm_task_state = poll_state; |
1da177e4 LT |
3419 | return ATA_SHORT_PAUSE; |
3420 | } | |
3421 | ||
14be71f4 | 3422 | ap->hsm_task_state = reg_state; |
1da177e4 LT |
3423 | return 0; |
3424 | } | |
3425 | ||
3426 | /** | |
6f0ef4fa RD |
3427 | * ata_pio_complete - check if drive is busy or idle |
3428 | * @ap: the target ata_port | |
1da177e4 LT |
3429 | * |
3430 | * LOCKING: | |
0cba632b | 3431 | * None. (executing in kernel thread context) |
7fb6ec28 JG |
3432 | * |
3433 | * RETURNS: | |
3434 | * Non-zero if qc completed, zero otherwise. | |
1da177e4 LT |
3435 | */ |
3436 | ||
7fb6ec28 | 3437 | static int ata_pio_complete (struct ata_port *ap) |
1da177e4 LT |
3438 | { |
3439 | struct ata_queued_cmd *qc; | |
3440 | u8 drv_stat; | |
3441 | ||
3442 | /* | |
31433ea3 AC |
3443 | * This is purely heuristic. This is a fast path. Sometimes when |
3444 | * we enter, BSY will be cleared in a chk-status or two. If not, | |
3445 | * the drive is probably seeking or something. Snooze for a couple | |
3446 | * msecs, then chk-status again. If still busy, fall back to | |
14be71f4 | 3447 | * HSM_ST_POLL state. |
1da177e4 | 3448 | */ |
fe79e683 AL |
3449 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
3450 | if (drv_stat & ATA_BUSY) { | |
1da177e4 | 3451 | msleep(2); |
fe79e683 AL |
3452 | drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); |
3453 | if (drv_stat & ATA_BUSY) { | |
14be71f4 | 3454 | ap->hsm_task_state = HSM_ST_LAST_POLL; |
1da177e4 | 3455 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
7fb6ec28 | 3456 | return 0; |
1da177e4 LT |
3457 | } |
3458 | } | |
3459 | ||
c14b8331 | 3460 | qc = ata_qc_from_tag(ap, ap->active_tag); |
a4631474 | 3461 | WARN_ON(qc == NULL); |
c14b8331 | 3462 | |
1da177e4 LT |
3463 | drv_stat = ata_wait_idle(ap); |
3464 | if (!ata_ok(drv_stat)) { | |
1c848984 | 3465 | qc->err_mask |= __ac_err_mask(drv_stat); |
14be71f4 | 3466 | ap->hsm_task_state = HSM_ST_ERR; |
7fb6ec28 | 3467 | return 0; |
1da177e4 LT |
3468 | } |
3469 | ||
14be71f4 | 3470 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 3471 | |
a4631474 | 3472 | WARN_ON(qc->err_mask); |
a22e2eb0 | 3473 | ata_poll_qc_complete(qc); |
7fb6ec28 JG |
3474 | |
3475 | /* another command may start at this point */ | |
3476 | ||
3477 | return 1; | |
1da177e4 LT |
3478 | } |
3479 | ||
0baab86b EF |
3480 | |
3481 | /** | |
c893a3ae | 3482 | * swap_buf_le16 - swap halves of 16-bit words in place |
0baab86b EF |
3483 | * @buf: Buffer to swap |
3484 | * @buf_words: Number of 16-bit words in buffer. | |
3485 | * | |
3486 | * Swap halves of 16-bit words if needed to convert from | |
3487 | * little-endian byte order to native cpu byte order, or | |
3488 | * vice-versa. | |
3489 | * | |
3490 | * LOCKING: | |
6f0ef4fa | 3491 | * Inherited from caller. |
0baab86b | 3492 | */ |
1da177e4 LT |
3493 | void swap_buf_le16(u16 *buf, unsigned int buf_words) |
3494 | { | |
3495 | #ifdef __BIG_ENDIAN | |
3496 | unsigned int i; | |
3497 | ||
3498 | for (i = 0; i < buf_words; i++) | |
3499 | buf[i] = le16_to_cpu(buf[i]); | |
3500 | #endif /* __BIG_ENDIAN */ | |
3501 | } | |
3502 | ||
6ae4cfb5 AL |
3503 | /** |
3504 | * ata_mmio_data_xfer - Transfer data by MMIO | |
3505 | * @ap: port to read/write | |
3506 | * @buf: data buffer | |
3507 | * @buflen: buffer length | |
344babaa | 3508 | * @write_data: read/write |
6ae4cfb5 AL |
3509 | * |
3510 | * Transfer data from/to the device data register by MMIO. | |
3511 | * | |
3512 | * LOCKING: | |
3513 | * Inherited from caller. | |
6ae4cfb5 AL |
3514 | */ |
3515 | ||
1da177e4 LT |
3516 | static void ata_mmio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3517 | unsigned int buflen, int write_data) | |
3518 | { | |
3519 | unsigned int i; | |
3520 | unsigned int words = buflen >> 1; | |
3521 | u16 *buf16 = (u16 *) buf; | |
3522 | void __iomem *mmio = (void __iomem *)ap->ioaddr.data_addr; | |
3523 | ||
6ae4cfb5 | 3524 | /* Transfer multiple of 2 bytes */ |
1da177e4 LT |
3525 | if (write_data) { |
3526 | for (i = 0; i < words; i++) | |
3527 | writew(le16_to_cpu(buf16[i]), mmio); | |
3528 | } else { | |
3529 | for (i = 0; i < words; i++) | |
3530 | buf16[i] = cpu_to_le16(readw(mmio)); | |
3531 | } | |
6ae4cfb5 AL |
3532 | |
3533 | /* Transfer trailing 1 byte, if any. */ | |
3534 | if (unlikely(buflen & 0x01)) { | |
3535 | u16 align_buf[1] = { 0 }; | |
3536 | unsigned char *trailing_buf = buf + buflen - 1; | |
3537 | ||
3538 | if (write_data) { | |
3539 | memcpy(align_buf, trailing_buf, 1); | |
3540 | writew(le16_to_cpu(align_buf[0]), mmio); | |
3541 | } else { | |
3542 | align_buf[0] = cpu_to_le16(readw(mmio)); | |
3543 | memcpy(trailing_buf, align_buf, 1); | |
3544 | } | |
3545 | } | |
1da177e4 LT |
3546 | } |
3547 | ||
6ae4cfb5 AL |
3548 | /** |
3549 | * ata_pio_data_xfer - Transfer data by PIO | |
3550 | * @ap: port to read/write | |
3551 | * @buf: data buffer | |
3552 | * @buflen: buffer length | |
344babaa | 3553 | * @write_data: read/write |
6ae4cfb5 AL |
3554 | * |
3555 | * Transfer data from/to the device data register by PIO. | |
3556 | * | |
3557 | * LOCKING: | |
3558 | * Inherited from caller. | |
6ae4cfb5 AL |
3559 | */ |
3560 | ||
1da177e4 LT |
3561 | static void ata_pio_data_xfer(struct ata_port *ap, unsigned char *buf, |
3562 | unsigned int buflen, int write_data) | |
3563 | { | |
6ae4cfb5 | 3564 | unsigned int words = buflen >> 1; |
1da177e4 | 3565 | |
6ae4cfb5 | 3566 | /* Transfer multiple of 2 bytes */ |
1da177e4 | 3567 | if (write_data) |
6ae4cfb5 | 3568 | outsw(ap->ioaddr.data_addr, buf, words); |
1da177e4 | 3569 | else |
6ae4cfb5 AL |
3570 | insw(ap->ioaddr.data_addr, buf, words); |
3571 | ||
3572 | /* Transfer trailing 1 byte, if any. */ | |
3573 | if (unlikely(buflen & 0x01)) { | |
3574 | u16 align_buf[1] = { 0 }; | |
3575 | unsigned char *trailing_buf = buf + buflen - 1; | |
3576 | ||
3577 | if (write_data) { | |
3578 | memcpy(align_buf, trailing_buf, 1); | |
3579 | outw(le16_to_cpu(align_buf[0]), ap->ioaddr.data_addr); | |
3580 | } else { | |
3581 | align_buf[0] = cpu_to_le16(inw(ap->ioaddr.data_addr)); | |
3582 | memcpy(trailing_buf, align_buf, 1); | |
3583 | } | |
3584 | } | |
1da177e4 LT |
3585 | } |
3586 | ||
6ae4cfb5 AL |
3587 | /** |
3588 | * ata_data_xfer - Transfer data from/to the data register. | |
3589 | * @ap: port to read/write | |
3590 | * @buf: data buffer | |
3591 | * @buflen: buffer length | |
3592 | * @do_write: read/write | |
3593 | * | |
3594 | * Transfer data from/to the device data register. | |
3595 | * | |
3596 | * LOCKING: | |
3597 | * Inherited from caller. | |
6ae4cfb5 AL |
3598 | */ |
3599 | ||
1da177e4 LT |
3600 | static void ata_data_xfer(struct ata_port *ap, unsigned char *buf, |
3601 | unsigned int buflen, int do_write) | |
3602 | { | |
a1bd9e68 AC |
3603 | /* Make the crap hardware pay the costs not the good stuff */ |
3604 | if (unlikely(ap->flags & ATA_FLAG_IRQ_MASK)) { | |
3605 | unsigned long flags; | |
3606 | local_irq_save(flags); | |
3607 | if (ap->flags & ATA_FLAG_MMIO) | |
3608 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3609 | else | |
3610 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3611 | local_irq_restore(flags); | |
3612 | } else { | |
3613 | if (ap->flags & ATA_FLAG_MMIO) | |
3614 | ata_mmio_data_xfer(ap, buf, buflen, do_write); | |
3615 | else | |
3616 | ata_pio_data_xfer(ap, buf, buflen, do_write); | |
3617 | } | |
1da177e4 LT |
3618 | } |
3619 | ||
6ae4cfb5 AL |
3620 | /** |
3621 | * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data. | |
3622 | * @qc: Command on going | |
3623 | * | |
3624 | * Transfer ATA_SECT_SIZE of data from/to the ATA device. | |
3625 | * | |
3626 | * LOCKING: | |
3627 | * Inherited from caller. | |
3628 | */ | |
3629 | ||
1da177e4 LT |
3630 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
3631 | { | |
3632 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3633 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3634 | struct ata_port *ap = qc->ap; |
3635 | struct page *page; | |
3636 | unsigned int offset; | |
3637 | unsigned char *buf; | |
3638 | ||
3639 | if (qc->cursect == (qc->nsect - 1)) | |
14be71f4 | 3640 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3641 | |
3642 | page = sg[qc->cursg].page; | |
3643 | offset = sg[qc->cursg].offset + qc->cursg_ofs * ATA_SECT_SIZE; | |
3644 | ||
3645 | /* get the current page and offset */ | |
3646 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3647 | offset %= PAGE_SIZE; | |
3648 | ||
3649 | buf = kmap(page) + offset; | |
3650 | ||
3651 | qc->cursect++; | |
3652 | qc->cursg_ofs++; | |
3653 | ||
32529e01 | 3654 | if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) { |
1da177e4 LT |
3655 | qc->cursg++; |
3656 | qc->cursg_ofs = 0; | |
3657 | } | |
3658 | ||
3659 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3660 | ||
3661 | /* do the actual data transfer */ | |
3662 | do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
3663 | ata_data_xfer(ap, buf, ATA_SECT_SIZE, do_write); | |
3664 | ||
3665 | kunmap(page); | |
3666 | } | |
3667 | ||
6ae4cfb5 AL |
3668 | /** |
3669 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3670 | * @qc: Command on going | |
3671 | * @bytes: number of bytes | |
3672 | * | |
3673 | * Transfer Transfer data from/to the ATAPI device. | |
3674 | * | |
3675 | * LOCKING: | |
3676 | * Inherited from caller. | |
3677 | * | |
3678 | */ | |
3679 | ||
1da177e4 LT |
3680 | static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
3681 | { | |
3682 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); | |
cedc9a47 | 3683 | struct scatterlist *sg = qc->__sg; |
1da177e4 LT |
3684 | struct ata_port *ap = qc->ap; |
3685 | struct page *page; | |
3686 | unsigned char *buf; | |
3687 | unsigned int offset, count; | |
3688 | ||
563a6e1f | 3689 | if (qc->curbytes + bytes >= qc->nbytes) |
14be71f4 | 3690 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3691 | |
3692 | next_sg: | |
563a6e1f | 3693 | if (unlikely(qc->cursg >= qc->n_elem)) { |
7fb6ec28 | 3694 | /* |
563a6e1f AL |
3695 | * The end of qc->sg is reached and the device expects |
3696 | * more data to transfer. In order not to overrun qc->sg | |
3697 | * and fulfill length specified in the byte count register, | |
3698 | * - for read case, discard trailing data from the device | |
3699 | * - for write case, padding zero data to the device | |
3700 | */ | |
3701 | u16 pad_buf[1] = { 0 }; | |
3702 | unsigned int words = bytes >> 1; | |
3703 | unsigned int i; | |
3704 | ||
3705 | if (words) /* warning if bytes > 1 */ | |
7fb6ec28 | 3706 | printk(KERN_WARNING "ata%u: %u bytes trailing data\n", |
563a6e1f AL |
3707 | ap->id, bytes); |
3708 | ||
3709 | for (i = 0; i < words; i++) | |
3710 | ata_data_xfer(ap, (unsigned char*)pad_buf, 2, do_write); | |
3711 | ||
14be71f4 | 3712 | ap->hsm_task_state = HSM_ST_LAST; |
563a6e1f AL |
3713 | return; |
3714 | } | |
3715 | ||
cedc9a47 | 3716 | sg = &qc->__sg[qc->cursg]; |
1da177e4 | 3717 | |
1da177e4 LT |
3718 | page = sg->page; |
3719 | offset = sg->offset + qc->cursg_ofs; | |
3720 | ||
3721 | /* get the current page and offset */ | |
3722 | page = nth_page(page, (offset >> PAGE_SHIFT)); | |
3723 | offset %= PAGE_SIZE; | |
3724 | ||
6952df03 | 3725 | /* don't overrun current sg */ |
32529e01 | 3726 | count = min(sg->length - qc->cursg_ofs, bytes); |
1da177e4 LT |
3727 | |
3728 | /* don't cross page boundaries */ | |
3729 | count = min(count, (unsigned int)PAGE_SIZE - offset); | |
3730 | ||
3731 | buf = kmap(page) + offset; | |
3732 | ||
3733 | bytes -= count; | |
3734 | qc->curbytes += count; | |
3735 | qc->cursg_ofs += count; | |
3736 | ||
32529e01 | 3737 | if (qc->cursg_ofs == sg->length) { |
1da177e4 LT |
3738 | qc->cursg++; |
3739 | qc->cursg_ofs = 0; | |
3740 | } | |
3741 | ||
3742 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); | |
3743 | ||
3744 | /* do the actual data transfer */ | |
3745 | ata_data_xfer(ap, buf, count, do_write); | |
3746 | ||
3747 | kunmap(page); | |
3748 | ||
563a6e1f | 3749 | if (bytes) |
1da177e4 | 3750 | goto next_sg; |
1da177e4 LT |
3751 | } |
3752 | ||
6ae4cfb5 AL |
3753 | /** |
3754 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. | |
3755 | * @qc: Command on going | |
3756 | * | |
3757 | * Transfer Transfer data from/to the ATAPI device. | |
3758 | * | |
3759 | * LOCKING: | |
3760 | * Inherited from caller. | |
6ae4cfb5 AL |
3761 | */ |
3762 | ||
1da177e4 LT |
3763 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
3764 | { | |
3765 | struct ata_port *ap = qc->ap; | |
3766 | struct ata_device *dev = qc->dev; | |
3767 | unsigned int ireason, bc_lo, bc_hi, bytes; | |
3768 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
3769 | ||
3770 | ap->ops->tf_read(ap, &qc->tf); | |
3771 | ireason = qc->tf.nsect; | |
3772 | bc_lo = qc->tf.lbam; | |
3773 | bc_hi = qc->tf.lbah; | |
3774 | bytes = (bc_hi << 8) | bc_lo; | |
3775 | ||
3776 | /* shall be cleared to zero, indicating xfer of data */ | |
3777 | if (ireason & (1 << 0)) | |
3778 | goto err_out; | |
3779 | ||
3780 | /* make sure transfer direction matches expected */ | |
3781 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; | |
3782 | if (do_write != i_write) | |
3783 | goto err_out; | |
3784 | ||
3785 | __atapi_pio_bytes(qc, bytes); | |
3786 | ||
3787 | return; | |
3788 | ||
3789 | err_out: | |
3790 | printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n", | |
3791 | ap->id, dev->devno); | |
11a56d24 | 3792 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3793 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
3794 | } |
3795 | ||
3796 | /** | |
6f0ef4fa RD |
3797 | * ata_pio_block - start PIO on a block |
3798 | * @ap: the target ata_port | |
1da177e4 LT |
3799 | * |
3800 | * LOCKING: | |
0cba632b | 3801 | * None. (executing in kernel thread context) |
1da177e4 LT |
3802 | */ |
3803 | ||
3804 | static void ata_pio_block(struct ata_port *ap) | |
3805 | { | |
3806 | struct ata_queued_cmd *qc; | |
3807 | u8 status; | |
3808 | ||
3809 | /* | |
6f0ef4fa | 3810 | * This is purely heuristic. This is a fast path. |
1da177e4 LT |
3811 | * Sometimes when we enter, BSY will be cleared in |
3812 | * a chk-status or two. If not, the drive is probably seeking | |
3813 | * or something. Snooze for a couple msecs, then | |
3814 | * chk-status again. If still busy, fall back to | |
14be71f4 | 3815 | * HSM_ST_POLL state. |
1da177e4 LT |
3816 | */ |
3817 | status = ata_busy_wait(ap, ATA_BUSY, 5); | |
3818 | if (status & ATA_BUSY) { | |
3819 | msleep(2); | |
3820 | status = ata_busy_wait(ap, ATA_BUSY, 10); | |
3821 | if (status & ATA_BUSY) { | |
14be71f4 | 3822 | ap->hsm_task_state = HSM_ST_POLL; |
1da177e4 LT |
3823 | ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; |
3824 | return; | |
3825 | } | |
3826 | } | |
3827 | ||
3828 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
a4631474 | 3829 | WARN_ON(qc == NULL); |
1da177e4 | 3830 | |
fe79e683 AL |
3831 | /* check error */ |
3832 | if (status & (ATA_ERR | ATA_DF)) { | |
3833 | qc->err_mask |= AC_ERR_DEV; | |
3834 | ap->hsm_task_state = HSM_ST_ERR; | |
3835 | return; | |
3836 | } | |
3837 | ||
3838 | /* transfer data if any */ | |
1da177e4 | 3839 | if (is_atapi_taskfile(&qc->tf)) { |
fe79e683 | 3840 | /* DRQ=0 means no more data to transfer */ |
1da177e4 | 3841 | if ((status & ATA_DRQ) == 0) { |
14be71f4 | 3842 | ap->hsm_task_state = HSM_ST_LAST; |
1da177e4 LT |
3843 | return; |
3844 | } | |
3845 | ||
3846 | atapi_pio_bytes(qc); | |
3847 | } else { | |
3848 | /* handle BSY=0, DRQ=0 as error */ | |
3849 | if ((status & ATA_DRQ) == 0) { | |
11a56d24 | 3850 | qc->err_mask |= AC_ERR_HSM; |
14be71f4 | 3851 | ap->hsm_task_state = HSM_ST_ERR; |
1da177e4 LT |
3852 | return; |
3853 | } | |
3854 | ||
3855 | ata_pio_sector(qc); | |
3856 | } | |
3857 | } | |
3858 | ||
3859 | static void ata_pio_error(struct ata_port *ap) | |
3860 | { | |
3861 | struct ata_queued_cmd *qc; | |
a7dac447 | 3862 | |
1da177e4 | 3863 | qc = ata_qc_from_tag(ap, ap->active_tag); |
a4631474 | 3864 | WARN_ON(qc == NULL); |
1da177e4 | 3865 | |
0565c26d AL |
3866 | if (qc->tf.command != ATA_CMD_PACKET) |
3867 | printk(KERN_WARNING "ata%u: PIO error\n", ap->id); | |
3868 | ||
2e9edbf8 | 3869 | /* make sure qc->err_mask is available to |
1c848984 AL |
3870 | * know what's wrong and recover |
3871 | */ | |
a4631474 | 3872 | WARN_ON(qc->err_mask == 0); |
1c848984 | 3873 | |
14be71f4 | 3874 | ap->hsm_task_state = HSM_ST_IDLE; |
1da177e4 | 3875 | |
a22e2eb0 | 3876 | ata_poll_qc_complete(qc); |
1da177e4 LT |
3877 | } |
3878 | ||
3879 | static void ata_pio_task(void *_data) | |
3880 | { | |
3881 | struct ata_port *ap = _data; | |
7fb6ec28 JG |
3882 | unsigned long timeout; |
3883 | int qc_completed; | |
3884 | ||
3885 | fsm_start: | |
3886 | timeout = 0; | |
3887 | qc_completed = 0; | |
1da177e4 | 3888 | |
14be71f4 AL |
3889 | switch (ap->hsm_task_state) { |
3890 | case HSM_ST_IDLE: | |
1da177e4 LT |
3891 | return; |
3892 | ||
14be71f4 | 3893 | case HSM_ST: |
1da177e4 LT |
3894 | ata_pio_block(ap); |
3895 | break; | |
3896 | ||
14be71f4 | 3897 | case HSM_ST_LAST: |
7fb6ec28 | 3898 | qc_completed = ata_pio_complete(ap); |
1da177e4 LT |
3899 | break; |
3900 | ||
14be71f4 AL |
3901 | case HSM_ST_POLL: |
3902 | case HSM_ST_LAST_POLL: | |
1da177e4 LT |
3903 | timeout = ata_pio_poll(ap); |
3904 | break; | |
3905 | ||
14be71f4 AL |
3906 | case HSM_ST_TMOUT: |
3907 | case HSM_ST_ERR: | |
1da177e4 LT |
3908 | ata_pio_error(ap); |
3909 | return; | |
3910 | } | |
3911 | ||
3912 | if (timeout) | |
8061f5f0 | 3913 | ata_port_queue_task(ap, ata_pio_task, ap, timeout); |
7fb6ec28 JG |
3914 | else if (!qc_completed) |
3915 | goto fsm_start; | |
1da177e4 LT |
3916 | } |
3917 | ||
8061f5f0 TH |
3918 | /** |
3919 | * atapi_packet_task - Write CDB bytes to hardware | |
3920 | * @_data: Port to which ATAPI device is attached. | |
3921 | * | |
3922 | * When device has indicated its readiness to accept | |
3923 | * a CDB, this function is called. Send the CDB. | |
3924 | * If DMA is to be performed, exit immediately. | |
3925 | * Otherwise, we are in polling mode, so poll | |
3926 | * status under operation succeeds or fails. | |
3927 | * | |
3928 | * LOCKING: | |
3929 | * Kernel thread context (may sleep) | |
3930 | */ | |
3931 | ||
3932 | static void atapi_packet_task(void *_data) | |
3933 | { | |
3934 | struct ata_port *ap = _data; | |
3935 | struct ata_queued_cmd *qc; | |
3936 | u8 status; | |
3937 | ||
3938 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
3939 | WARN_ON(qc == NULL); | |
3940 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
3941 | ||
3942 | /* sleep-wait for BSY to clear */ | |
3943 | DPRINTK("busy wait\n"); | |
3944 | if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) { | |
3945 | qc->err_mask |= AC_ERR_TIMEOUT; | |
3946 | goto err_out; | |
3947 | } | |
3948 | ||
3949 | /* make sure DRQ is set */ | |
3950 | status = ata_chk_status(ap); | |
3951 | if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) { | |
3952 | qc->err_mask |= AC_ERR_HSM; | |
3953 | goto err_out; | |
3954 | } | |
3955 | ||
3956 | /* send SCSI cdb */ | |
3957 | DPRINTK("send cdb\n"); | |
3958 | WARN_ON(qc->dev->cdb_len < 12); | |
3959 | ||
3960 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA || | |
3961 | qc->tf.protocol == ATA_PROT_ATAPI_NODATA) { | |
3962 | unsigned long flags; | |
3963 | ||
3964 | /* Once we're done issuing command and kicking bmdma, | |
3965 | * irq handler takes over. To not lose irq, we need | |
3966 | * to clear NOINTR flag before sending cdb, but | |
3967 | * interrupt handler shouldn't be invoked before we're | |
3968 | * finished. Hence, the following locking. | |
3969 | */ | |
3970 | spin_lock_irqsave(&ap->host_set->lock, flags); | |
3971 | ap->flags &= ~ATA_FLAG_NOINTR; | |
3972 | ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); | |
3973 | if (qc->tf.protocol == ATA_PROT_ATAPI_DMA) | |
3974 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
3975 | spin_unlock_irqrestore(&ap->host_set->lock, flags); | |
3976 | } else { | |
3977 | ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1); | |
3978 | ||
3979 | /* PIO commands are handled by polling */ | |
3980 | ap->hsm_task_state = HSM_ST; | |
3981 | ata_port_queue_task(ap, ata_pio_task, ap, 0); | |
3982 | } | |
3983 | ||
3984 | return; | |
3985 | ||
3986 | err_out: | |
3987 | ata_poll_qc_complete(qc); | |
3988 | } | |
3989 | ||
1da177e4 LT |
3990 | /** |
3991 | * ata_qc_timeout - Handle timeout of queued command | |
3992 | * @qc: Command that timed out | |
3993 | * | |
3994 | * Some part of the kernel (currently, only the SCSI layer) | |
3995 | * has noticed that the active command on port @ap has not | |
3996 | * completed after a specified length of time. Handle this | |
3997 | * condition by disabling DMA (if necessary) and completing | |
3998 | * transactions, with error if necessary. | |
3999 | * | |
4000 | * This also handles the case of the "lost interrupt", where | |
4001 | * for some reason (possibly hardware bug, possibly driver bug) | |
4002 | * an interrupt was not delivered to the driver, even though the | |
4003 | * transaction completed successfully. | |
4004 | * | |
4005 | * LOCKING: | |
0cba632b | 4006 | * Inherited from SCSI layer (none, can sleep) |
1da177e4 LT |
4007 | */ |
4008 | ||
4009 | static void ata_qc_timeout(struct ata_queued_cmd *qc) | |
4010 | { | |
4011 | struct ata_port *ap = qc->ap; | |
b8f6153e | 4012 | struct ata_host_set *host_set = ap->host_set; |
1da177e4 | 4013 | u8 host_stat = 0, drv_stat; |
b8f6153e | 4014 | unsigned long flags; |
1da177e4 LT |
4015 | |
4016 | DPRINTK("ENTER\n"); | |
4017 | ||
c18d06f8 TH |
4018 | ap->hsm_task_state = HSM_ST_IDLE; |
4019 | ||
b8f6153e JG |
4020 | spin_lock_irqsave(&host_set->lock, flags); |
4021 | ||
1da177e4 LT |
4022 | switch (qc->tf.protocol) { |
4023 | ||
4024 | case ATA_PROT_DMA: | |
4025 | case ATA_PROT_ATAPI_DMA: | |
4026 | host_stat = ap->ops->bmdma_status(ap); | |
4027 | ||
4028 | /* before we do anything else, clear DMA-Start bit */ | |
b73fc89f | 4029 | ap->ops->bmdma_stop(qc); |
1da177e4 LT |
4030 | |
4031 | /* fall through */ | |
4032 | ||
4033 | default: | |
4034 | ata_altstatus(ap); | |
4035 | drv_stat = ata_chk_status(ap); | |
4036 | ||
4037 | /* ack bmdma irq events */ | |
4038 | ap->ops->irq_clear(ap); | |
4039 | ||
4040 | printk(KERN_ERR "ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n", | |
4041 | ap->id, qc->tf.command, drv_stat, host_stat); | |
4042 | ||
4043 | /* complete taskfile transaction */ | |
a22e2eb0 | 4044 | qc->err_mask |= ac_err_mask(drv_stat); |
1da177e4 LT |
4045 | break; |
4046 | } | |
b8f6153e JG |
4047 | |
4048 | spin_unlock_irqrestore(&host_set->lock, flags); | |
4049 | ||
a72ec4ce TH |
4050 | ata_eh_qc_complete(qc); |
4051 | ||
1da177e4 LT |
4052 | DPRINTK("EXIT\n"); |
4053 | } | |
4054 | ||
4055 | /** | |
4056 | * ata_eng_timeout - Handle timeout of queued command | |
4057 | * @ap: Port on which timed-out command is active | |
4058 | * | |
4059 | * Some part of the kernel (currently, only the SCSI layer) | |
4060 | * has noticed that the active command on port @ap has not | |
4061 | * completed after a specified length of time. Handle this | |
4062 | * condition by disabling DMA (if necessary) and completing | |
4063 | * transactions, with error if necessary. | |
4064 | * | |
4065 | * This also handles the case of the "lost interrupt", where | |
4066 | * for some reason (possibly hardware bug, possibly driver bug) | |
4067 | * an interrupt was not delivered to the driver, even though the | |
4068 | * transaction completed successfully. | |
4069 | * | |
4070 | * LOCKING: | |
4071 | * Inherited from SCSI layer (none, can sleep) | |
4072 | */ | |
4073 | ||
4074 | void ata_eng_timeout(struct ata_port *ap) | |
4075 | { | |
1da177e4 LT |
4076 | DPRINTK("ENTER\n"); |
4077 | ||
f6379020 | 4078 | ata_qc_timeout(ata_qc_from_tag(ap, ap->active_tag)); |
1da177e4 | 4079 | |
1da177e4 LT |
4080 | DPRINTK("EXIT\n"); |
4081 | } | |
4082 | ||
4083 | /** | |
4084 | * ata_qc_new - Request an available ATA command, for queueing | |
4085 | * @ap: Port associated with device @dev | |
4086 | * @dev: Device from whom we request an available command structure | |
4087 | * | |
4088 | * LOCKING: | |
0cba632b | 4089 | * None. |
1da177e4 LT |
4090 | */ |
4091 | ||
4092 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
4093 | { | |
4094 | struct ata_queued_cmd *qc = NULL; | |
4095 | unsigned int i; | |
4096 | ||
4097 | for (i = 0; i < ATA_MAX_QUEUE; i++) | |
4098 | if (!test_and_set_bit(i, &ap->qactive)) { | |
4099 | qc = ata_qc_from_tag(ap, i); | |
4100 | break; | |
4101 | } | |
4102 | ||
4103 | if (qc) | |
4104 | qc->tag = i; | |
4105 | ||
4106 | return qc; | |
4107 | } | |
4108 | ||
4109 | /** | |
4110 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
4111 | * @ap: Port associated with device @dev | |
4112 | * @dev: Device from whom we request an available command structure | |
4113 | * | |
4114 | * LOCKING: | |
0cba632b | 4115 | * None. |
1da177e4 LT |
4116 | */ |
4117 | ||
4118 | struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap, | |
4119 | struct ata_device *dev) | |
4120 | { | |
4121 | struct ata_queued_cmd *qc; | |
4122 | ||
4123 | qc = ata_qc_new(ap); | |
4124 | if (qc) { | |
1da177e4 LT |
4125 | qc->scsicmd = NULL; |
4126 | qc->ap = ap; | |
4127 | qc->dev = dev; | |
1da177e4 | 4128 | |
2c13b7ce | 4129 | ata_qc_reinit(qc); |
1da177e4 LT |
4130 | } |
4131 | ||
4132 | return qc; | |
4133 | } | |
4134 | ||
1da177e4 LT |
4135 | /** |
4136 | * ata_qc_free - free unused ata_queued_cmd | |
4137 | * @qc: Command to complete | |
4138 | * | |
4139 | * Designed to free unused ata_queued_cmd object | |
4140 | * in case something prevents using it. | |
4141 | * | |
4142 | * LOCKING: | |
0cba632b | 4143 | * spin_lock_irqsave(host_set lock) |
1da177e4 LT |
4144 | */ |
4145 | void ata_qc_free(struct ata_queued_cmd *qc) | |
4146 | { | |
4ba946e9 TH |
4147 | struct ata_port *ap = qc->ap; |
4148 | unsigned int tag; | |
4149 | ||
a4631474 | 4150 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 4151 | |
4ba946e9 TH |
4152 | qc->flags = 0; |
4153 | tag = qc->tag; | |
4154 | if (likely(ata_tag_valid(tag))) { | |
4155 | if (tag == ap->active_tag) | |
4156 | ap->active_tag = ATA_TAG_POISON; | |
4157 | qc->tag = ATA_TAG_POISON; | |
4158 | clear_bit(tag, &ap->qactive); | |
4159 | } | |
1da177e4 LT |
4160 | } |
4161 | ||
76014427 | 4162 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 4163 | { |
a4631474 TH |
4164 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
4165 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
4166 | |
4167 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4168 | ata_sg_clean(qc); | |
4169 | ||
3f3791d3 AL |
4170 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4171 | * from completing the command twice later, before the error handler | |
4172 | * is called. (when rc != 0 and atapi request sense is needed) | |
4173 | */ | |
4174 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
4175 | ||
1da177e4 | 4176 | /* call completion callback */ |
77853bf2 | 4177 | qc->complete_fn(qc); |
1da177e4 LT |
4178 | } |
4179 | ||
4180 | static inline int ata_should_dma_map(struct ata_queued_cmd *qc) | |
4181 | { | |
4182 | struct ata_port *ap = qc->ap; | |
4183 | ||
4184 | switch (qc->tf.protocol) { | |
4185 | case ATA_PROT_DMA: | |
4186 | case ATA_PROT_ATAPI_DMA: | |
4187 | return 1; | |
4188 | ||
4189 | case ATA_PROT_ATAPI: | |
4190 | case ATA_PROT_PIO: | |
1da177e4 LT |
4191 | if (ap->flags & ATA_FLAG_PIO_DMA) |
4192 | return 1; | |
4193 | ||
4194 | /* fall through */ | |
4195 | ||
4196 | default: | |
4197 | return 0; | |
4198 | } | |
4199 | ||
4200 | /* never reached */ | |
4201 | } | |
4202 | ||
4203 | /** | |
4204 | * ata_qc_issue - issue taskfile to device | |
4205 | * @qc: command to issue to device | |
4206 | * | |
4207 | * Prepare an ATA command to submission to device. | |
4208 | * This includes mapping the data into a DMA-able | |
4209 | * area, filling in the S/G table, and finally | |
4210 | * writing the taskfile to hardware, starting the command. | |
4211 | * | |
4212 | * LOCKING: | |
4213 | * spin_lock_irqsave(host_set lock) | |
1da177e4 | 4214 | */ |
8e0e694a | 4215 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
4216 | { |
4217 | struct ata_port *ap = qc->ap; | |
4218 | ||
e4a70e76 TH |
4219 | qc->ap->active_tag = qc->tag; |
4220 | qc->flags |= ATA_QCFLAG_ACTIVE; | |
4221 | ||
1da177e4 LT |
4222 | if (ata_should_dma_map(qc)) { |
4223 | if (qc->flags & ATA_QCFLAG_SG) { | |
4224 | if (ata_sg_setup(qc)) | |
8e436af9 | 4225 | goto sg_err; |
1da177e4 LT |
4226 | } else if (qc->flags & ATA_QCFLAG_SINGLE) { |
4227 | if (ata_sg_setup_one(qc)) | |
8e436af9 | 4228 | goto sg_err; |
1da177e4 LT |
4229 | } |
4230 | } else { | |
4231 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
4232 | } | |
4233 | ||
4234 | ap->ops->qc_prep(qc); | |
4235 | ||
8e0e694a TH |
4236 | qc->err_mask |= ap->ops->qc_issue(qc); |
4237 | if (unlikely(qc->err_mask)) | |
4238 | goto err; | |
4239 | return; | |
1da177e4 | 4240 | |
8e436af9 TH |
4241 | sg_err: |
4242 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
8e0e694a TH |
4243 | qc->err_mask |= AC_ERR_SYSTEM; |
4244 | err: | |
4245 | ata_qc_complete(qc); | |
1da177e4 LT |
4246 | } |
4247 | ||
4248 | /** | |
4249 | * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner | |
4250 | * @qc: command to issue to device | |
4251 | * | |
4252 | * Using various libata functions and hooks, this function | |
4253 | * starts an ATA command. ATA commands are grouped into | |
4254 | * classes called "protocols", and issuing each type of protocol | |
4255 | * is slightly different. | |
4256 | * | |
0baab86b EF |
4257 | * May be used as the qc_issue() entry in ata_port_operations. |
4258 | * | |
1da177e4 LT |
4259 | * LOCKING: |
4260 | * spin_lock_irqsave(host_set lock) | |
4261 | * | |
4262 | * RETURNS: | |
9a3d9eb0 | 4263 | * Zero on success, AC_ERR_* mask on failure |
1da177e4 LT |
4264 | */ |
4265 | ||
9a3d9eb0 | 4266 | unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc) |
1da177e4 LT |
4267 | { |
4268 | struct ata_port *ap = qc->ap; | |
4269 | ||
4270 | ata_dev_select(ap, qc->dev->devno, 1, 0); | |
4271 | ||
4272 | switch (qc->tf.protocol) { | |
4273 | case ATA_PROT_NODATA: | |
e5338254 | 4274 | ata_tf_to_host(ap, &qc->tf); |
1da177e4 LT |
4275 | break; |
4276 | ||
4277 | case ATA_PROT_DMA: | |
4278 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ | |
4279 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
4280 | ap->ops->bmdma_start(qc); /* initiate bmdma */ | |
4281 | break; | |
4282 | ||
4283 | case ATA_PROT_PIO: /* load tf registers, initiate polling pio */ | |
4284 | ata_qc_set_polling(qc); | |
e5338254 | 4285 | ata_tf_to_host(ap, &qc->tf); |
14be71f4 | 4286 | ap->hsm_task_state = HSM_ST; |
8061f5f0 | 4287 | ata_port_queue_task(ap, ata_pio_task, ap, 0); |
1da177e4 LT |
4288 | break; |
4289 | ||
4290 | case ATA_PROT_ATAPI: | |
4291 | ata_qc_set_polling(qc); | |
e5338254 | 4292 | ata_tf_to_host(ap, &qc->tf); |
8061f5f0 | 4293 | ata_port_queue_task(ap, atapi_packet_task, ap, 0); |
1da177e4 LT |
4294 | break; |
4295 | ||
4296 | case ATA_PROT_ATAPI_NODATA: | |
c1389503 | 4297 | ap->flags |= ATA_FLAG_NOINTR; |
e5338254 | 4298 | ata_tf_to_host(ap, &qc->tf); |
8061f5f0 | 4299 | ata_port_queue_task(ap, atapi_packet_task, ap, 0); |
1da177e4 LT |
4300 | break; |
4301 | ||
4302 | case ATA_PROT_ATAPI_DMA: | |
c1389503 | 4303 | ap->flags |= ATA_FLAG_NOINTR; |
1da177e4 LT |
4304 | ap->ops->tf_load(ap, &qc->tf); /* load tf registers */ |
4305 | ap->ops->bmdma_setup(qc); /* set up bmdma */ | |
8061f5f0 | 4306 | ata_port_queue_task(ap, atapi_packet_task, ap, 0); |
1da177e4 LT |
4307 | break; |
4308 | ||
4309 | default: | |
4310 | WARN_ON(1); | |
9a3d9eb0 | 4311 | return AC_ERR_SYSTEM; |
1da177e4 LT |
4312 | } |
4313 | ||
4314 | return 0; | |
4315 | } | |
4316 | ||
1da177e4 LT |
4317 | /** |
4318 | * ata_host_intr - Handle host interrupt for given (port, task) | |
4319 | * @ap: Port on which interrupt arrived (possibly...) | |
4320 | * @qc: Taskfile currently active in engine | |
4321 | * | |
4322 | * Handle host interrupt for given queued command. Currently, | |
4323 | * only DMA interrupts are handled. All other commands are | |
4324 | * handled via polling with interrupts disabled (nIEN bit). | |
4325 | * | |
4326 | * LOCKING: | |
4327 | * spin_lock_irqsave(host_set lock) | |
4328 | * | |
4329 | * RETURNS: | |
4330 | * One if interrupt was handled, zero if not (shared irq). | |
4331 | */ | |
4332 | ||
4333 | inline unsigned int ata_host_intr (struct ata_port *ap, | |
4334 | struct ata_queued_cmd *qc) | |
4335 | { | |
4336 | u8 status, host_stat; | |
4337 | ||
4338 | switch (qc->tf.protocol) { | |
4339 | ||
4340 | case ATA_PROT_DMA: | |
4341 | case ATA_PROT_ATAPI_DMA: | |
4342 | case ATA_PROT_ATAPI: | |
4343 | /* check status of DMA engine */ | |
4344 | host_stat = ap->ops->bmdma_status(ap); | |
4345 | VPRINTK("ata%u: host_stat 0x%X\n", ap->id, host_stat); | |
4346 | ||
4347 | /* if it's not our irq... */ | |
4348 | if (!(host_stat & ATA_DMA_INTR)) | |
4349 | goto idle_irq; | |
4350 | ||
4351 | /* before we do anything else, clear DMA-Start bit */ | |
b73fc89f | 4352 | ap->ops->bmdma_stop(qc); |
1da177e4 LT |
4353 | |
4354 | /* fall through */ | |
4355 | ||
4356 | case ATA_PROT_ATAPI_NODATA: | |
4357 | case ATA_PROT_NODATA: | |
4358 | /* check altstatus */ | |
4359 | status = ata_altstatus(ap); | |
4360 | if (status & ATA_BUSY) | |
4361 | goto idle_irq; | |
4362 | ||
4363 | /* check main status, clearing INTRQ */ | |
4364 | status = ata_chk_status(ap); | |
4365 | if (unlikely(status & ATA_BUSY)) | |
4366 | goto idle_irq; | |
4367 | DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n", | |
4368 | ap->id, qc->tf.protocol, status); | |
4369 | ||
4370 | /* ack bmdma irq events */ | |
4371 | ap->ops->irq_clear(ap); | |
4372 | ||
4373 | /* complete taskfile transaction */ | |
a22e2eb0 AL |
4374 | qc->err_mask |= ac_err_mask(status); |
4375 | ata_qc_complete(qc); | |
1da177e4 LT |
4376 | break; |
4377 | ||
4378 | default: | |
4379 | goto idle_irq; | |
4380 | } | |
4381 | ||
4382 | return 1; /* irq handled */ | |
4383 | ||
4384 | idle_irq: | |
4385 | ap->stats.idle_irq++; | |
4386 | ||
4387 | #ifdef ATA_IRQ_TRAP | |
4388 | if ((ap->stats.idle_irq % 1000) == 0) { | |
1da177e4 LT |
4389 | ata_irq_ack(ap, 0); /* debug trap */ |
4390 | printk(KERN_WARNING "ata%d: irq trap\n", ap->id); | |
23cfce89 | 4391 | return 1; |
1da177e4 LT |
4392 | } |
4393 | #endif | |
4394 | return 0; /* irq not handled */ | |
4395 | } | |
4396 | ||
4397 | /** | |
4398 | * ata_interrupt - Default ATA host interrupt handler | |
0cba632b JG |
4399 | * @irq: irq line (unused) |
4400 | * @dev_instance: pointer to our ata_host_set information structure | |
1da177e4 LT |
4401 | * @regs: unused |
4402 | * | |
0cba632b JG |
4403 | * Default interrupt handler for PCI IDE devices. Calls |
4404 | * ata_host_intr() for each port that is not disabled. | |
4405 | * | |
1da177e4 | 4406 | * LOCKING: |
0cba632b | 4407 | * Obtains host_set lock during operation. |
1da177e4 LT |
4408 | * |
4409 | * RETURNS: | |
0cba632b | 4410 | * IRQ_NONE or IRQ_HANDLED. |
1da177e4 LT |
4411 | */ |
4412 | ||
4413 | irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs) | |
4414 | { | |
4415 | struct ata_host_set *host_set = dev_instance; | |
4416 | unsigned int i; | |
4417 | unsigned int handled = 0; | |
4418 | unsigned long flags; | |
4419 | ||
4420 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ | |
4421 | spin_lock_irqsave(&host_set->lock, flags); | |
4422 | ||
4423 | for (i = 0; i < host_set->n_ports; i++) { | |
4424 | struct ata_port *ap; | |
4425 | ||
4426 | ap = host_set->ports[i]; | |
c1389503 TH |
4427 | if (ap && |
4428 | !(ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))) { | |
1da177e4 LT |
4429 | struct ata_queued_cmd *qc; |
4430 | ||
4431 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
21b1ed74 AL |
4432 | if (qc && (!(qc->tf.ctl & ATA_NIEN)) && |
4433 | (qc->flags & ATA_QCFLAG_ACTIVE)) | |
1da177e4 LT |
4434 | handled |= ata_host_intr(ap, qc); |
4435 | } | |
4436 | } | |
4437 | ||
4438 | spin_unlock_irqrestore(&host_set->lock, flags); | |
4439 | ||
4440 | return IRQ_RETVAL(handled); | |
4441 | } | |
4442 | ||
0baab86b | 4443 | |
9b847548 JA |
4444 | /* |
4445 | * Execute a 'simple' command, that only consists of the opcode 'cmd' itself, | |
4446 | * without filling any other registers | |
4447 | */ | |
4448 | static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev, | |
4449 | u8 cmd) | |
4450 | { | |
4451 | struct ata_taskfile tf; | |
4452 | int err; | |
4453 | ||
4454 | ata_tf_init(ap, &tf, dev->devno); | |
4455 | ||
4456 | tf.command = cmd; | |
4457 | tf.flags |= ATA_TFLAG_DEVICE; | |
4458 | tf.protocol = ATA_PROT_NODATA; | |
4459 | ||
4460 | err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); | |
4461 | if (err) | |
4462 | printk(KERN_ERR "%s: ata command failed: %d\n", | |
4463 | __FUNCTION__, err); | |
4464 | ||
4465 | return err; | |
4466 | } | |
4467 | ||
4468 | static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev) | |
4469 | { | |
4470 | u8 cmd; | |
4471 | ||
4472 | if (!ata_try_flush_cache(dev)) | |
4473 | return 0; | |
4474 | ||
4475 | if (ata_id_has_flush_ext(dev->id)) | |
4476 | cmd = ATA_CMD_FLUSH_EXT; | |
4477 | else | |
4478 | cmd = ATA_CMD_FLUSH; | |
4479 | ||
4480 | return ata_do_simple_cmd(ap, dev, cmd); | |
4481 | } | |
4482 | ||
4483 | static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev) | |
4484 | { | |
4485 | return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1); | |
4486 | } | |
4487 | ||
4488 | static int ata_start_drive(struct ata_port *ap, struct ata_device *dev) | |
4489 | { | |
4490 | return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE); | |
4491 | } | |
4492 | ||
4493 | /** | |
4494 | * ata_device_resume - wakeup a previously suspended devices | |
c893a3ae RD |
4495 | * @ap: port the device is connected to |
4496 | * @dev: the device to resume | |
9b847548 JA |
4497 | * |
4498 | * Kick the drive back into action, by sending it an idle immediate | |
4499 | * command and making sure its transfer mode matches between drive | |
4500 | * and host. | |
4501 | * | |
4502 | */ | |
4503 | int ata_device_resume(struct ata_port *ap, struct ata_device *dev) | |
4504 | { | |
4505 | if (ap->flags & ATA_FLAG_SUSPENDED) { | |
e82cbdb9 | 4506 | struct ata_device *failed_dev; |
9b847548 | 4507 | ap->flags &= ~ATA_FLAG_SUSPENDED; |
e82cbdb9 TH |
4508 | while (ata_set_mode(ap, &failed_dev)) |
4509 | ata_dev_disable(ap, failed_dev); | |
9b847548 | 4510 | } |
e1211e3f | 4511 | if (!ata_dev_enabled(dev)) |
9b847548 JA |
4512 | return 0; |
4513 | if (dev->class == ATA_DEV_ATA) | |
4514 | ata_start_drive(ap, dev); | |
4515 | ||
4516 | return 0; | |
4517 | } | |
4518 | ||
4519 | /** | |
4520 | * ata_device_suspend - prepare a device for suspend | |
c893a3ae RD |
4521 | * @ap: port the device is connected to |
4522 | * @dev: the device to suspend | |
9b847548 JA |
4523 | * |
4524 | * Flush the cache on the drive, if appropriate, then issue a | |
4525 | * standbynow command. | |
9b847548 | 4526 | */ |
082776e4 | 4527 | int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state) |
9b847548 | 4528 | { |
e1211e3f | 4529 | if (!ata_dev_enabled(dev)) |
9b847548 JA |
4530 | return 0; |
4531 | if (dev->class == ATA_DEV_ATA) | |
4532 | ata_flush_cache(ap, dev); | |
4533 | ||
082776e4 NC |
4534 | if (state.event != PM_EVENT_FREEZE) |
4535 | ata_standby_drive(ap, dev); | |
9b847548 JA |
4536 | ap->flags |= ATA_FLAG_SUSPENDED; |
4537 | return 0; | |
4538 | } | |
4539 | ||
c893a3ae RD |
4540 | /** |
4541 | * ata_port_start - Set port up for dma. | |
4542 | * @ap: Port to initialize | |
4543 | * | |
4544 | * Called just after data structures for each port are | |
4545 | * initialized. Allocates space for PRD table. | |
4546 | * | |
4547 | * May be used as the port_start() entry in ata_port_operations. | |
4548 | * | |
4549 | * LOCKING: | |
4550 | * Inherited from caller. | |
4551 | */ | |
4552 | ||
1da177e4 LT |
4553 | int ata_port_start (struct ata_port *ap) |
4554 | { | |
2f1f610b | 4555 | struct device *dev = ap->dev; |
6037d6bb | 4556 | int rc; |
1da177e4 LT |
4557 | |
4558 | ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL); | |
4559 | if (!ap->prd) | |
4560 | return -ENOMEM; | |
4561 | ||
6037d6bb JG |
4562 | rc = ata_pad_alloc(ap, dev); |
4563 | if (rc) { | |
cedc9a47 | 4564 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); |
6037d6bb | 4565 | return rc; |
cedc9a47 JG |
4566 | } |
4567 | ||
1da177e4 LT |
4568 | DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma); |
4569 | ||
4570 | return 0; | |
4571 | } | |
4572 | ||
0baab86b EF |
4573 | |
4574 | /** | |
4575 | * ata_port_stop - Undo ata_port_start() | |
4576 | * @ap: Port to shut down | |
4577 | * | |
4578 | * Frees the PRD table. | |
4579 | * | |
4580 | * May be used as the port_stop() entry in ata_port_operations. | |
4581 | * | |
4582 | * LOCKING: | |
6f0ef4fa | 4583 | * Inherited from caller. |
0baab86b EF |
4584 | */ |
4585 | ||
1da177e4 LT |
4586 | void ata_port_stop (struct ata_port *ap) |
4587 | { | |
2f1f610b | 4588 | struct device *dev = ap->dev; |
1da177e4 LT |
4589 | |
4590 | dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma); | |
6037d6bb | 4591 | ata_pad_free(ap, dev); |
1da177e4 LT |
4592 | } |
4593 | ||
aa8f0dc6 JG |
4594 | void ata_host_stop (struct ata_host_set *host_set) |
4595 | { | |
4596 | if (host_set->mmio_base) | |
4597 | iounmap(host_set->mmio_base); | |
4598 | } | |
4599 | ||
4600 | ||
1da177e4 LT |
4601 | /** |
4602 | * ata_host_remove - Unregister SCSI host structure with upper layers | |
4603 | * @ap: Port to unregister | |
4604 | * @do_unregister: 1 if we fully unregister, 0 to just stop the port | |
4605 | * | |
4606 | * LOCKING: | |
6f0ef4fa | 4607 | * Inherited from caller. |
1da177e4 LT |
4608 | */ |
4609 | ||
4610 | static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister) | |
4611 | { | |
4612 | struct Scsi_Host *sh = ap->host; | |
4613 | ||
4614 | DPRINTK("ENTER\n"); | |
4615 | ||
4616 | if (do_unregister) | |
4617 | scsi_remove_host(sh); | |
4618 | ||
4619 | ap->ops->port_stop(ap); | |
4620 | } | |
4621 | ||
4622 | /** | |
4623 | * ata_host_init - Initialize an ata_port structure | |
4624 | * @ap: Structure to initialize | |
4625 | * @host: associated SCSI mid-layer structure | |
4626 | * @host_set: Collection of hosts to which @ap belongs | |
4627 | * @ent: Probe information provided by low-level driver | |
4628 | * @port_no: Port number associated with this ata_port | |
4629 | * | |
0cba632b JG |
4630 | * Initialize a new ata_port structure, and its associated |
4631 | * scsi_host. | |
4632 | * | |
1da177e4 | 4633 | * LOCKING: |
0cba632b | 4634 | * Inherited from caller. |
1da177e4 LT |
4635 | */ |
4636 | ||
4637 | static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host, | |
4638 | struct ata_host_set *host_set, | |
057ace5e | 4639 | const struct ata_probe_ent *ent, unsigned int port_no) |
1da177e4 LT |
4640 | { |
4641 | unsigned int i; | |
4642 | ||
4643 | host->max_id = 16; | |
4644 | host->max_lun = 1; | |
4645 | host->max_channel = 1; | |
4646 | host->unique_id = ata_unique_id++; | |
4647 | host->max_cmd_len = 12; | |
12413197 | 4648 | |
1da177e4 LT |
4649 | ap->flags = ATA_FLAG_PORT_DISABLED; |
4650 | ap->id = host->unique_id; | |
4651 | ap->host = host; | |
4652 | ap->ctl = ATA_DEVCTL_OBS; | |
4653 | ap->host_set = host_set; | |
2f1f610b | 4654 | ap->dev = ent->dev; |
1da177e4 LT |
4655 | ap->port_no = port_no; |
4656 | ap->hard_port_no = | |
4657 | ent->legacy_mode ? ent->hard_port_no : port_no; | |
4658 | ap->pio_mask = ent->pio_mask; | |
4659 | ap->mwdma_mask = ent->mwdma_mask; | |
4660 | ap->udma_mask = ent->udma_mask; | |
4661 | ap->flags |= ent->host_flags; | |
4662 | ap->ops = ent->port_ops; | |
4663 | ap->cbl = ATA_CBL_NONE; | |
1c3fae4d | 4664 | ap->sata_spd_limit = UINT_MAX; |
1da177e4 LT |
4665 | ap->active_tag = ATA_TAG_POISON; |
4666 | ap->last_ctl = 0xFF; | |
4667 | ||
86e45b6b | 4668 | INIT_WORK(&ap->port_task, NULL, NULL); |
a72ec4ce | 4669 | INIT_LIST_HEAD(&ap->eh_done_q); |
1da177e4 | 4670 | |
acf356b1 TH |
4671 | for (i = 0; i < ATA_MAX_DEVICES; i++) { |
4672 | struct ata_device *dev = &ap->device[i]; | |
4673 | dev->devno = i; | |
4674 | dev->pio_mask = UINT_MAX; | |
4675 | dev->mwdma_mask = UINT_MAX; | |
4676 | dev->udma_mask = UINT_MAX; | |
4677 | } | |
1da177e4 LT |
4678 | |
4679 | #ifdef ATA_IRQ_TRAP | |
4680 | ap->stats.unhandled_irq = 1; | |
4681 | ap->stats.idle_irq = 1; | |
4682 | #endif | |
4683 | ||
4684 | memcpy(&ap->ioaddr, &ent->port[port_no], sizeof(struct ata_ioports)); | |
4685 | } | |
4686 | ||
4687 | /** | |
4688 | * ata_host_add - Attach low-level ATA driver to system | |
4689 | * @ent: Information provided by low-level driver | |
4690 | * @host_set: Collections of ports to which we add | |
4691 | * @port_no: Port number associated with this host | |
4692 | * | |
0cba632b JG |
4693 | * Attach low-level ATA driver to system. |
4694 | * | |
1da177e4 | 4695 | * LOCKING: |
0cba632b | 4696 | * PCI/etc. bus probe sem. |
1da177e4 LT |
4697 | * |
4698 | * RETURNS: | |
0cba632b | 4699 | * New ata_port on success, for NULL on error. |
1da177e4 LT |
4700 | */ |
4701 | ||
057ace5e | 4702 | static struct ata_port * ata_host_add(const struct ata_probe_ent *ent, |
1da177e4 LT |
4703 | struct ata_host_set *host_set, |
4704 | unsigned int port_no) | |
4705 | { | |
4706 | struct Scsi_Host *host; | |
4707 | struct ata_port *ap; | |
4708 | int rc; | |
4709 | ||
4710 | DPRINTK("ENTER\n"); | |
aec5c3c1 TH |
4711 | |
4712 | if (!ent->port_ops->probe_reset && | |
4713 | !(ent->host_flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST))) { | |
4714 | printk(KERN_ERR "ata%u: no reset mechanism available\n", | |
4715 | port_no); | |
4716 | return NULL; | |
4717 | } | |
4718 | ||
1da177e4 LT |
4719 | host = scsi_host_alloc(ent->sht, sizeof(struct ata_port)); |
4720 | if (!host) | |
4721 | return NULL; | |
4722 | ||
30afc84c TH |
4723 | host->transportt = &ata_scsi_transport_template; |
4724 | ||
1da177e4 LT |
4725 | ap = (struct ata_port *) &host->hostdata[0]; |
4726 | ||
4727 | ata_host_init(ap, host, host_set, ent, port_no); | |
4728 | ||
4729 | rc = ap->ops->port_start(ap); | |
4730 | if (rc) | |
4731 | goto err_out; | |
4732 | ||
4733 | return ap; | |
4734 | ||
4735 | err_out: | |
4736 | scsi_host_put(host); | |
4737 | return NULL; | |
4738 | } | |
4739 | ||
4740 | /** | |
0cba632b JG |
4741 | * ata_device_add - Register hardware device with ATA and SCSI layers |
4742 | * @ent: Probe information describing hardware device to be registered | |
4743 | * | |
4744 | * This function processes the information provided in the probe | |
4745 | * information struct @ent, allocates the necessary ATA and SCSI | |
4746 | * host information structures, initializes them, and registers | |
4747 | * everything with requisite kernel subsystems. | |
4748 | * | |
4749 | * This function requests irqs, probes the ATA bus, and probes | |
4750 | * the SCSI bus. | |
1da177e4 LT |
4751 | * |
4752 | * LOCKING: | |
0cba632b | 4753 | * PCI/etc. bus probe sem. |
1da177e4 LT |
4754 | * |
4755 | * RETURNS: | |
0cba632b | 4756 | * Number of ports registered. Zero on error (no ports registered). |
1da177e4 LT |
4757 | */ |
4758 | ||
057ace5e | 4759 | int ata_device_add(const struct ata_probe_ent *ent) |
1da177e4 LT |
4760 | { |
4761 | unsigned int count = 0, i; | |
4762 | struct device *dev = ent->dev; | |
4763 | struct ata_host_set *host_set; | |
4764 | ||
4765 | DPRINTK("ENTER\n"); | |
4766 | /* alloc a container for our list of ATA ports (buses) */ | |
57f3bda8 | 4767 | host_set = kzalloc(sizeof(struct ata_host_set) + |
1da177e4 LT |
4768 | (ent->n_ports * sizeof(void *)), GFP_KERNEL); |
4769 | if (!host_set) | |
4770 | return 0; | |
1da177e4 LT |
4771 | spin_lock_init(&host_set->lock); |
4772 | ||
4773 | host_set->dev = dev; | |
4774 | host_set->n_ports = ent->n_ports; | |
4775 | host_set->irq = ent->irq; | |
4776 | host_set->mmio_base = ent->mmio_base; | |
4777 | host_set->private_data = ent->private_data; | |
4778 | host_set->ops = ent->port_ops; | |
5444a6f4 | 4779 | host_set->flags = ent->host_set_flags; |
1da177e4 LT |
4780 | |
4781 | /* register each port bound to this device */ | |
4782 | for (i = 0; i < ent->n_ports; i++) { | |
4783 | struct ata_port *ap; | |
4784 | unsigned long xfer_mode_mask; | |
4785 | ||
4786 | ap = ata_host_add(ent, host_set, i); | |
4787 | if (!ap) | |
4788 | goto err_out; | |
4789 | ||
4790 | host_set->ports[i] = ap; | |
4791 | xfer_mode_mask =(ap->udma_mask << ATA_SHIFT_UDMA) | | |
4792 | (ap->mwdma_mask << ATA_SHIFT_MWDMA) | | |
4793 | (ap->pio_mask << ATA_SHIFT_PIO); | |
4794 | ||
4795 | /* print per-port info to dmesg */ | |
4796 | printk(KERN_INFO "ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX " | |
4797 | "bmdma 0x%lX irq %lu\n", | |
4798 | ap->id, | |
4799 | ap->flags & ATA_FLAG_SATA ? 'S' : 'P', | |
4800 | ata_mode_string(xfer_mode_mask), | |
4801 | ap->ioaddr.cmd_addr, | |
4802 | ap->ioaddr.ctl_addr, | |
4803 | ap->ioaddr.bmdma_addr, | |
4804 | ent->irq); | |
4805 | ||
4806 | ata_chk_status(ap); | |
4807 | host_set->ops->irq_clear(ap); | |
4808 | count++; | |
4809 | } | |
4810 | ||
57f3bda8 RD |
4811 | if (!count) |
4812 | goto err_free_ret; | |
1da177e4 LT |
4813 | |
4814 | /* obtain irq, that is shared between channels */ | |
4815 | if (request_irq(ent->irq, ent->port_ops->irq_handler, ent->irq_flags, | |
4816 | DRV_NAME, host_set)) | |
4817 | goto err_out; | |
4818 | ||
4819 | /* perform each probe synchronously */ | |
4820 | DPRINTK("probe begin\n"); | |
4821 | for (i = 0; i < count; i++) { | |
4822 | struct ata_port *ap; | |
4823 | int rc; | |
4824 | ||
4825 | ap = host_set->ports[i]; | |
4826 | ||
c893a3ae | 4827 | DPRINTK("ata%u: bus probe begin\n", ap->id); |
1da177e4 | 4828 | rc = ata_bus_probe(ap); |
c893a3ae | 4829 | DPRINTK("ata%u: bus probe end\n", ap->id); |
1da177e4 LT |
4830 | |
4831 | if (rc) { | |
4832 | /* FIXME: do something useful here? | |
4833 | * Current libata behavior will | |
4834 | * tear down everything when | |
4835 | * the module is removed | |
4836 | * or the h/w is unplugged. | |
4837 | */ | |
4838 | } | |
4839 | ||
4840 | rc = scsi_add_host(ap->host, dev); | |
4841 | if (rc) { | |
4842 | printk(KERN_ERR "ata%u: scsi_add_host failed\n", | |
4843 | ap->id); | |
4844 | /* FIXME: do something useful here */ | |
4845 | /* FIXME: handle unconditional calls to | |
4846 | * scsi_scan_host and ata_host_remove, below, | |
4847 | * at the very least | |
4848 | */ | |
4849 | } | |
4850 | } | |
4851 | ||
4852 | /* probes are done, now scan each port's disk(s) */ | |
c893a3ae | 4853 | DPRINTK("host probe begin\n"); |
1da177e4 LT |
4854 | for (i = 0; i < count; i++) { |
4855 | struct ata_port *ap = host_set->ports[i]; | |
4856 | ||
644dd0cc | 4857 | ata_scsi_scan_host(ap); |
1da177e4 LT |
4858 | } |
4859 | ||
4860 | dev_set_drvdata(dev, host_set); | |
4861 | ||
4862 | VPRINTK("EXIT, returning %u\n", ent->n_ports); | |
4863 | return ent->n_ports; /* success */ | |
4864 | ||
4865 | err_out: | |
4866 | for (i = 0; i < count; i++) { | |
4867 | ata_host_remove(host_set->ports[i], 1); | |
4868 | scsi_host_put(host_set->ports[i]->host); | |
4869 | } | |
57f3bda8 | 4870 | err_free_ret: |
1da177e4 LT |
4871 | kfree(host_set); |
4872 | VPRINTK("EXIT, returning 0\n"); | |
4873 | return 0; | |
4874 | } | |
4875 | ||
17b14451 AC |
4876 | /** |
4877 | * ata_host_set_remove - PCI layer callback for device removal | |
4878 | * @host_set: ATA host set that was removed | |
4879 | * | |
2e9edbf8 | 4880 | * Unregister all objects associated with this host set. Free those |
17b14451 AC |
4881 | * objects. |
4882 | * | |
4883 | * LOCKING: | |
4884 | * Inherited from calling layer (may sleep). | |
4885 | */ | |
4886 | ||
17b14451 AC |
4887 | void ata_host_set_remove(struct ata_host_set *host_set) |
4888 | { | |
4889 | struct ata_port *ap; | |
4890 | unsigned int i; | |
4891 | ||
4892 | for (i = 0; i < host_set->n_ports; i++) { | |
4893 | ap = host_set->ports[i]; | |
4894 | scsi_remove_host(ap->host); | |
4895 | } | |
4896 | ||
4897 | free_irq(host_set->irq, host_set); | |
4898 | ||
4899 | for (i = 0; i < host_set->n_ports; i++) { | |
4900 | ap = host_set->ports[i]; | |
4901 | ||
4902 | ata_scsi_release(ap->host); | |
4903 | ||
4904 | if ((ap->flags & ATA_FLAG_NO_LEGACY) == 0) { | |
4905 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
4906 | ||
4907 | if (ioaddr->cmd_addr == 0x1f0) | |
4908 | release_region(0x1f0, 8); | |
4909 | else if (ioaddr->cmd_addr == 0x170) | |
4910 | release_region(0x170, 8); | |
4911 | } | |
4912 | ||
4913 | scsi_host_put(ap->host); | |
4914 | } | |
4915 | ||
4916 | if (host_set->ops->host_stop) | |
4917 | host_set->ops->host_stop(host_set); | |
4918 | ||
4919 | kfree(host_set); | |
4920 | } | |
4921 | ||
1da177e4 LT |
4922 | /** |
4923 | * ata_scsi_release - SCSI layer callback hook for host unload | |
4924 | * @host: libata host to be unloaded | |
4925 | * | |
4926 | * Performs all duties necessary to shut down a libata port... | |
4927 | * Kill port kthread, disable port, and release resources. | |
4928 | * | |
4929 | * LOCKING: | |
4930 | * Inherited from SCSI layer. | |
4931 | * | |
4932 | * RETURNS: | |
4933 | * One. | |
4934 | */ | |
4935 | ||
4936 | int ata_scsi_release(struct Scsi_Host *host) | |
4937 | { | |
4938 | struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; | |
d9572b1d | 4939 | int i; |
1da177e4 LT |
4940 | |
4941 | DPRINTK("ENTER\n"); | |
4942 | ||
4943 | ap->ops->port_disable(ap); | |
4944 | ata_host_remove(ap, 0); | |
d9572b1d TH |
4945 | for (i = 0; i < ATA_MAX_DEVICES; i++) |
4946 | kfree(ap->device[i].id); | |
1da177e4 LT |
4947 | |
4948 | DPRINTK("EXIT\n"); | |
4949 | return 1; | |
4950 | } | |
4951 | ||
4952 | /** | |
4953 | * ata_std_ports - initialize ioaddr with standard port offsets. | |
4954 | * @ioaddr: IO address structure to be initialized | |
0baab86b EF |
4955 | * |
4956 | * Utility function which initializes data_addr, error_addr, | |
4957 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, | |
4958 | * device_addr, status_addr, and command_addr to standard offsets | |
4959 | * relative to cmd_addr. | |
4960 | * | |
4961 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. | |
1da177e4 | 4962 | */ |
0baab86b | 4963 | |
1da177e4 LT |
4964 | void ata_std_ports(struct ata_ioports *ioaddr) |
4965 | { | |
4966 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; | |
4967 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; | |
4968 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; | |
4969 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; | |
4970 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; | |
4971 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; | |
4972 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; | |
4973 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; | |
4974 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; | |
4975 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; | |
4976 | } | |
4977 | ||
0baab86b | 4978 | |
374b1873 JG |
4979 | #ifdef CONFIG_PCI |
4980 | ||
4981 | void ata_pci_host_stop (struct ata_host_set *host_set) | |
4982 | { | |
4983 | struct pci_dev *pdev = to_pci_dev(host_set->dev); | |
4984 | ||
4985 | pci_iounmap(pdev, host_set->mmio_base); | |
4986 | } | |
4987 | ||
1da177e4 LT |
4988 | /** |
4989 | * ata_pci_remove_one - PCI layer callback for device removal | |
4990 | * @pdev: PCI device that was removed | |
4991 | * | |
4992 | * PCI layer indicates to libata via this hook that | |
6f0ef4fa | 4993 | * hot-unplug or module unload event has occurred. |
1da177e4 LT |
4994 | * Handle this by unregistering all objects associated |
4995 | * with this PCI device. Free those objects. Then finally | |
4996 | * release PCI resources and disable device. | |
4997 | * | |
4998 | * LOCKING: | |
4999 | * Inherited from PCI layer (may sleep). | |
5000 | */ | |
5001 | ||
5002 | void ata_pci_remove_one (struct pci_dev *pdev) | |
5003 | { | |
5004 | struct device *dev = pci_dev_to_dev(pdev); | |
5005 | struct ata_host_set *host_set = dev_get_drvdata(dev); | |
1da177e4 | 5006 | |
17b14451 | 5007 | ata_host_set_remove(host_set); |
1da177e4 LT |
5008 | pci_release_regions(pdev); |
5009 | pci_disable_device(pdev); | |
5010 | dev_set_drvdata(dev, NULL); | |
5011 | } | |
5012 | ||
5013 | /* move to PCI subsystem */ | |
057ace5e | 5014 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
5015 | { |
5016 | unsigned long tmp = 0; | |
5017 | ||
5018 | switch (bits->width) { | |
5019 | case 1: { | |
5020 | u8 tmp8 = 0; | |
5021 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
5022 | tmp = tmp8; | |
5023 | break; | |
5024 | } | |
5025 | case 2: { | |
5026 | u16 tmp16 = 0; | |
5027 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
5028 | tmp = tmp16; | |
5029 | break; | |
5030 | } | |
5031 | case 4: { | |
5032 | u32 tmp32 = 0; | |
5033 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
5034 | tmp = tmp32; | |
5035 | break; | |
5036 | } | |
5037 | ||
5038 | default: | |
5039 | return -EINVAL; | |
5040 | } | |
5041 | ||
5042 | tmp &= bits->mask; | |
5043 | ||
5044 | return (tmp == bits->val) ? 1 : 0; | |
5045 | } | |
9b847548 JA |
5046 | |
5047 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state) | |
5048 | { | |
5049 | pci_save_state(pdev); | |
5050 | pci_disable_device(pdev); | |
5051 | pci_set_power_state(pdev, PCI_D3hot); | |
5052 | return 0; | |
5053 | } | |
5054 | ||
5055 | int ata_pci_device_resume(struct pci_dev *pdev) | |
5056 | { | |
5057 | pci_set_power_state(pdev, PCI_D0); | |
5058 | pci_restore_state(pdev); | |
5059 | pci_enable_device(pdev); | |
5060 | pci_set_master(pdev); | |
5061 | return 0; | |
5062 | } | |
1da177e4 LT |
5063 | #endif /* CONFIG_PCI */ |
5064 | ||
5065 | ||
1da177e4 LT |
5066 | static int __init ata_init(void) |
5067 | { | |
5068 | ata_wq = create_workqueue("ata"); | |
5069 | if (!ata_wq) | |
5070 | return -ENOMEM; | |
5071 | ||
5072 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); | |
5073 | return 0; | |
5074 | } | |
5075 | ||
5076 | static void __exit ata_exit(void) | |
5077 | { | |
5078 | destroy_workqueue(ata_wq); | |
5079 | } | |
5080 | ||
5081 | module_init(ata_init); | |
5082 | module_exit(ata_exit); | |
5083 | ||
67846b30 JG |
5084 | static unsigned long ratelimit_time; |
5085 | static spinlock_t ata_ratelimit_lock = SPIN_LOCK_UNLOCKED; | |
5086 | ||
5087 | int ata_ratelimit(void) | |
5088 | { | |
5089 | int rc; | |
5090 | unsigned long flags; | |
5091 | ||
5092 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
5093 | ||
5094 | if (time_after(jiffies, ratelimit_time)) { | |
5095 | rc = 1; | |
5096 | ratelimit_time = jiffies + (HZ/5); | |
5097 | } else | |
5098 | rc = 0; | |
5099 | ||
5100 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
5101 | ||
5102 | return rc; | |
5103 | } | |
5104 | ||
1da177e4 LT |
5105 | /* |
5106 | * libata is essentially a library of internal helper functions for | |
5107 | * low-level ATA host controller drivers. As such, the API/ABI is | |
5108 | * likely to change as new drivers are added and updated. | |
5109 | * Do not depend on ABI/API stability. | |
5110 | */ | |
5111 | ||
5112 | EXPORT_SYMBOL_GPL(ata_std_bios_param); | |
5113 | EXPORT_SYMBOL_GPL(ata_std_ports); | |
5114 | EXPORT_SYMBOL_GPL(ata_device_add); | |
17b14451 | 5115 | EXPORT_SYMBOL_GPL(ata_host_set_remove); |
1da177e4 LT |
5116 | EXPORT_SYMBOL_GPL(ata_sg_init); |
5117 | EXPORT_SYMBOL_GPL(ata_sg_init_one); | |
76014427 | 5118 | EXPORT_SYMBOL_GPL(__ata_qc_complete); |
1da177e4 LT |
5119 | EXPORT_SYMBOL_GPL(ata_qc_issue_prot); |
5120 | EXPORT_SYMBOL_GPL(ata_eng_timeout); | |
5121 | EXPORT_SYMBOL_GPL(ata_tf_load); | |
5122 | EXPORT_SYMBOL_GPL(ata_tf_read); | |
5123 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); | |
5124 | EXPORT_SYMBOL_GPL(ata_std_dev_select); | |
5125 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); | |
5126 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
5127 | EXPORT_SYMBOL_GPL(ata_check_status); | |
5128 | EXPORT_SYMBOL_GPL(ata_altstatus); | |
1da177e4 LT |
5129 | EXPORT_SYMBOL_GPL(ata_exec_command); |
5130 | EXPORT_SYMBOL_GPL(ata_port_start); | |
5131 | EXPORT_SYMBOL_GPL(ata_port_stop); | |
aa8f0dc6 | 5132 | EXPORT_SYMBOL_GPL(ata_host_stop); |
1da177e4 LT |
5133 | EXPORT_SYMBOL_GPL(ata_interrupt); |
5134 | EXPORT_SYMBOL_GPL(ata_qc_prep); | |
e46834cd | 5135 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
1da177e4 LT |
5136 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
5137 | EXPORT_SYMBOL_GPL(ata_bmdma_start); | |
5138 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); | |
5139 | EXPORT_SYMBOL_GPL(ata_bmdma_status); | |
5140 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); | |
5141 | EXPORT_SYMBOL_GPL(ata_port_probe); | |
5142 | EXPORT_SYMBOL_GPL(sata_phy_reset); | |
5143 | EXPORT_SYMBOL_GPL(__sata_phy_reset); | |
5144 | EXPORT_SYMBOL_GPL(ata_bus_reset); | |
8a19ac89 | 5145 | EXPORT_SYMBOL_GPL(ata_std_probeinit); |
c2bd5804 TH |
5146 | EXPORT_SYMBOL_GPL(ata_std_softreset); |
5147 | EXPORT_SYMBOL_GPL(sata_std_hardreset); | |
5148 | EXPORT_SYMBOL_GPL(ata_std_postreset); | |
5149 | EXPORT_SYMBOL_GPL(ata_std_probe_reset); | |
a62c0fc5 | 5150 | EXPORT_SYMBOL_GPL(ata_drive_probe_reset); |
623a3128 | 5151 | EXPORT_SYMBOL_GPL(ata_dev_revalidate); |
2e9edbf8 JG |
5152 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
5153 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 5154 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 5155 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
6f8b9958 | 5156 | EXPORT_SYMBOL_GPL(ata_busy_sleep); |
86e45b6b | 5157 | EXPORT_SYMBOL_GPL(ata_port_queue_task); |
1da177e4 LT |
5158 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
5159 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
5160 | EXPORT_SYMBOL_GPL(ata_scsi_error); | |
5161 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); | |
5162 | EXPORT_SYMBOL_GPL(ata_scsi_release); | |
5163 | EXPORT_SYMBOL_GPL(ata_host_intr); | |
6a62a04d TH |
5164 | EXPORT_SYMBOL_GPL(ata_id_string); |
5165 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
1da177e4 | 5166 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
a72ec4ce TH |
5167 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
5168 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
1da177e4 | 5169 | |
1bc4ccff | 5170 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
452503f9 AC |
5171 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
5172 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
5173 | ||
1da177e4 LT |
5174 | #ifdef CONFIG_PCI |
5175 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
374b1873 | 5176 | EXPORT_SYMBOL_GPL(ata_pci_host_stop); |
1da177e4 LT |
5177 | EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); |
5178 | EXPORT_SYMBOL_GPL(ata_pci_init_one); | |
5179 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); | |
9b847548 JA |
5180 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
5181 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
67951ade AC |
5182 | EXPORT_SYMBOL_GPL(ata_pci_default_filter); |
5183 | EXPORT_SYMBOL_GPL(ata_pci_clear_simplex); | |
1da177e4 | 5184 | #endif /* CONFIG_PCI */ |
9b847548 JA |
5185 | |
5186 | EXPORT_SYMBOL_GPL(ata_device_suspend); | |
5187 | EXPORT_SYMBOL_GPL(ata_device_resume); | |
5188 | EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); | |
5189 | EXPORT_SYMBOL_GPL(ata_scsi_device_resume); |