Commit | Line | Data |
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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * libata-core.c - helper library for ATA |
3 | * | |
4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2003-2004 Red Hat, Inc. All rights reserved. | |
9 | * Copyright 2003-2004 Jeff Garzik | |
10 | * | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; see the file COPYING. If not, write to | |
24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | * | |
26 | * | |
27 | * libata documentation is available via 'make {ps|pdf}docs', | |
28 | * as Documentation/DocBook/libata.* | |
29 | * | |
30 | * Hardware documentation available from http://www.t13.org/ and | |
31 | * http://www.sata-io.org/ | |
32 | * | |
92c52c52 AC |
33 | * Standards documents from: |
34 | * http://www.t13.org (ATA standards, PCI DMA IDE spec) | |
35 | * http://www.t10.org (SCSI MMC - for ATAPI MMC) | |
36 | * http://www.sata-io.org (SATA) | |
37 | * http://www.compactflash.org (CF) | |
38 | * http://www.qic.org (QIC157 - Tape and DSC) | |
39 | * http://www.ce-ata.org (CE-ATA: not supported) | |
40 | * | |
1da177e4 LT |
41 | */ |
42 | ||
1da177e4 LT |
43 | #include <linux/kernel.h> |
44 | #include <linux/module.h> | |
45 | #include <linux/pci.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/list.h> | |
48 | #include <linux/mm.h> | |
1da177e4 LT |
49 | #include <linux/spinlock.h> |
50 | #include <linux/blkdev.h> | |
51 | #include <linux/delay.h> | |
52 | #include <linux/timer.h> | |
53 | #include <linux/interrupt.h> | |
54 | #include <linux/completion.h> | |
55 | #include <linux/suspend.h> | |
56 | #include <linux/workqueue.h> | |
67846b30 | 57 | #include <linux/jiffies.h> |
378f058c | 58 | #include <linux/scatterlist.h> |
2dcb407e | 59 | #include <linux/io.h> |
1da177e4 | 60 | #include <scsi/scsi.h> |
193515d5 | 61 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
62 | #include <scsi/scsi_host.h> |
63 | #include <linux/libata.h> | |
1da177e4 LT |
64 | #include <asm/semaphore.h> |
65 | #include <asm/byteorder.h> | |
140b5e59 | 66 | #include <linux/cdrom.h> |
1da177e4 LT |
67 | |
68 | #include "libata.h" | |
69 | ||
fda0efc5 | 70 | |
d7bb4cc7 | 71 | /* debounce timing parameters in msecs { interval, duration, timeout } */ |
e9c83914 TH |
72 | const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
73 | const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; | |
74 | const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; | |
d7bb4cc7 | 75 | |
029cfd6b TH |
76 | const struct ata_port_operations ata_base_port_ops = { |
77 | .irq_clear = ata_noop_irq_clear, | |
9363c382 TH |
78 | .prereset = ata_sff_prereset, |
79 | .hardreset = sata_sff_hardreset, | |
80 | .postreset = ata_sff_postreset, | |
a1efdaba | 81 | .error_handler = ata_std_error_handler, |
029cfd6b TH |
82 | }; |
83 | ||
84 | const struct ata_port_operations sata_port_ops = { | |
85 | .inherits = &ata_base_port_ops, | |
86 | ||
87 | .qc_defer = ata_std_qc_defer, | |
88 | .dev_select = ata_noop_dev_select, | |
89 | }; | |
90 | ||
91 | const struct ata_port_operations sata_pmp_port_ops = { | |
92 | .inherits = &sata_port_ops, | |
a1efdaba TH |
93 | |
94 | .pmp_prereset = sata_pmp_std_prereset, | |
95 | .pmp_hardreset = sata_pmp_std_hardreset, | |
96 | .pmp_postreset = sata_pmp_std_postreset, | |
97 | .error_handler = sata_pmp_error_handler, | |
029cfd6b TH |
98 | }; |
99 | ||
3373efd8 TH |
100 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
101 | u16 heads, u16 sectors); | |
102 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev); | |
218f3d30 JG |
103 | static unsigned int ata_dev_set_feature(struct ata_device *dev, |
104 | u8 enable, u8 feature); | |
3373efd8 | 105 | static void ata_dev_xfermask(struct ata_device *dev); |
75683fe7 | 106 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
1da177e4 | 107 | |
f3187195 | 108 | unsigned int ata_print_id = 1; |
1da177e4 LT |
109 | static struct workqueue_struct *ata_wq; |
110 | ||
453b07ac TH |
111 | struct workqueue_struct *ata_aux_wq; |
112 | ||
33267325 TH |
113 | struct ata_force_param { |
114 | const char *name; | |
115 | unsigned int cbl; | |
116 | int spd_limit; | |
117 | unsigned long xfer_mask; | |
118 | unsigned int horkage_on; | |
119 | unsigned int horkage_off; | |
120 | }; | |
121 | ||
122 | struct ata_force_ent { | |
123 | int port; | |
124 | int device; | |
125 | struct ata_force_param param; | |
126 | }; | |
127 | ||
128 | static struct ata_force_ent *ata_force_tbl; | |
129 | static int ata_force_tbl_size; | |
130 | ||
131 | static char ata_force_param_buf[PAGE_SIZE] __initdata; | |
7afb4222 TH |
132 | /* param_buf is thrown away after initialization, disallow read */ |
133 | module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); | |
33267325 TH |
134 | MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); |
135 | ||
418dc1f5 | 136 | int atapi_enabled = 1; |
1623c81e JG |
137 | module_param(atapi_enabled, int, 0444); |
138 | MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); | |
139 | ||
c5c61bda | 140 | static int atapi_dmadir = 0; |
95de719a AL |
141 | module_param(atapi_dmadir, int, 0444); |
142 | MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); | |
143 | ||
baf4fdfa ML |
144 | int atapi_passthru16 = 1; |
145 | module_param(atapi_passthru16, int, 0444); | |
146 | MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); | |
147 | ||
c3c013a2 JG |
148 | int libata_fua = 0; |
149 | module_param_named(fua, libata_fua, int, 0444); | |
150 | MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); | |
151 | ||
2dcb407e | 152 | static int ata_ignore_hpa; |
1e999736 AC |
153 | module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
154 | MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); | |
155 | ||
b3a70601 AC |
156 | static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
157 | module_param_named(dma, libata_dma_mask, int, 0444); | |
158 | MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); | |
159 | ||
a8601e5f AM |
160 | static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
161 | module_param(ata_probe_timeout, int, 0444); | |
162 | MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); | |
163 | ||
6ebe9d86 | 164 | int libata_noacpi = 0; |
d7d0dad6 | 165 | module_param_named(noacpi, libata_noacpi, int, 0444); |
6ebe9d86 | 166 | MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); |
11ef697b | 167 | |
ae8d4ee7 AC |
168 | int libata_allow_tpm = 0; |
169 | module_param_named(allow_tpm, libata_allow_tpm, int, 0444); | |
170 | MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands"); | |
171 | ||
1da177e4 LT |
172 | MODULE_AUTHOR("Jeff Garzik"); |
173 | MODULE_DESCRIPTION("Library module for ATA devices"); | |
174 | MODULE_LICENSE("GPL"); | |
175 | MODULE_VERSION(DRV_VERSION); | |
176 | ||
0baab86b | 177 | |
33267325 TH |
178 | /** |
179 | * ata_force_cbl - force cable type according to libata.force | |
4cdfa1b3 | 180 | * @ap: ATA port of interest |
33267325 TH |
181 | * |
182 | * Force cable type according to libata.force and whine about it. | |
183 | * The last entry which has matching port number is used, so it | |
184 | * can be specified as part of device force parameters. For | |
185 | * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the | |
186 | * same effect. | |
187 | * | |
188 | * LOCKING: | |
189 | * EH context. | |
190 | */ | |
191 | void ata_force_cbl(struct ata_port *ap) | |
192 | { | |
193 | int i; | |
194 | ||
195 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
196 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
197 | ||
198 | if (fe->port != -1 && fe->port != ap->print_id) | |
199 | continue; | |
200 | ||
201 | if (fe->param.cbl == ATA_CBL_NONE) | |
202 | continue; | |
203 | ||
204 | ap->cbl = fe->param.cbl; | |
205 | ata_port_printk(ap, KERN_NOTICE, | |
206 | "FORCE: cable set to %s\n", fe->param.name); | |
207 | return; | |
208 | } | |
209 | } | |
210 | ||
211 | /** | |
212 | * ata_force_spd_limit - force SATA spd limit according to libata.force | |
213 | * @link: ATA link of interest | |
214 | * | |
215 | * Force SATA spd limit according to libata.force and whine about | |
216 | * it. When only the port part is specified (e.g. 1:), the limit | |
217 | * applies to all links connected to both the host link and all | |
218 | * fan-out ports connected via PMP. If the device part is | |
219 | * specified as 0 (e.g. 1.00:), it specifies the first fan-out | |
220 | * link not the host link. Device number 15 always points to the | |
221 | * host link whether PMP is attached or not. | |
222 | * | |
223 | * LOCKING: | |
224 | * EH context. | |
225 | */ | |
226 | static void ata_force_spd_limit(struct ata_link *link) | |
227 | { | |
228 | int linkno, i; | |
229 | ||
230 | if (ata_is_host_link(link)) | |
231 | linkno = 15; | |
232 | else | |
233 | linkno = link->pmp; | |
234 | ||
235 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
236 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
237 | ||
238 | if (fe->port != -1 && fe->port != link->ap->print_id) | |
239 | continue; | |
240 | ||
241 | if (fe->device != -1 && fe->device != linkno) | |
242 | continue; | |
243 | ||
244 | if (!fe->param.spd_limit) | |
245 | continue; | |
246 | ||
247 | link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; | |
248 | ata_link_printk(link, KERN_NOTICE, | |
249 | "FORCE: PHY spd limit set to %s\n", fe->param.name); | |
250 | return; | |
251 | } | |
252 | } | |
253 | ||
254 | /** | |
255 | * ata_force_xfermask - force xfermask according to libata.force | |
256 | * @dev: ATA device of interest | |
257 | * | |
258 | * Force xfer_mask according to libata.force and whine about it. | |
259 | * For consistency with link selection, device number 15 selects | |
260 | * the first device connected to the host link. | |
261 | * | |
262 | * LOCKING: | |
263 | * EH context. | |
264 | */ | |
265 | static void ata_force_xfermask(struct ata_device *dev) | |
266 | { | |
267 | int devno = dev->link->pmp + dev->devno; | |
268 | int alt_devno = devno; | |
269 | int i; | |
270 | ||
271 | /* allow n.15 for the first device attached to host port */ | |
272 | if (ata_is_host_link(dev->link) && devno == 0) | |
273 | alt_devno = 15; | |
274 | ||
275 | for (i = ata_force_tbl_size - 1; i >= 0; i--) { | |
276 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
277 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
278 | ||
279 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
280 | continue; | |
281 | ||
282 | if (fe->device != -1 && fe->device != devno && | |
283 | fe->device != alt_devno) | |
284 | continue; | |
285 | ||
286 | if (!fe->param.xfer_mask) | |
287 | continue; | |
288 | ||
289 | ata_unpack_xfermask(fe->param.xfer_mask, | |
290 | &pio_mask, &mwdma_mask, &udma_mask); | |
291 | if (udma_mask) | |
292 | dev->udma_mask = udma_mask; | |
293 | else if (mwdma_mask) { | |
294 | dev->udma_mask = 0; | |
295 | dev->mwdma_mask = mwdma_mask; | |
296 | } else { | |
297 | dev->udma_mask = 0; | |
298 | dev->mwdma_mask = 0; | |
299 | dev->pio_mask = pio_mask; | |
300 | } | |
301 | ||
302 | ata_dev_printk(dev, KERN_NOTICE, | |
303 | "FORCE: xfer_mask set to %s\n", fe->param.name); | |
304 | return; | |
305 | } | |
306 | } | |
307 | ||
308 | /** | |
309 | * ata_force_horkage - force horkage according to libata.force | |
310 | * @dev: ATA device of interest | |
311 | * | |
312 | * Force horkage according to libata.force and whine about it. | |
313 | * For consistency with link selection, device number 15 selects | |
314 | * the first device connected to the host link. | |
315 | * | |
316 | * LOCKING: | |
317 | * EH context. | |
318 | */ | |
319 | static void ata_force_horkage(struct ata_device *dev) | |
320 | { | |
321 | int devno = dev->link->pmp + dev->devno; | |
322 | int alt_devno = devno; | |
323 | int i; | |
324 | ||
325 | /* allow n.15 for the first device attached to host port */ | |
326 | if (ata_is_host_link(dev->link) && devno == 0) | |
327 | alt_devno = 15; | |
328 | ||
329 | for (i = 0; i < ata_force_tbl_size; i++) { | |
330 | const struct ata_force_ent *fe = &ata_force_tbl[i]; | |
331 | ||
332 | if (fe->port != -1 && fe->port != dev->link->ap->print_id) | |
333 | continue; | |
334 | ||
335 | if (fe->device != -1 && fe->device != devno && | |
336 | fe->device != alt_devno) | |
337 | continue; | |
338 | ||
339 | if (!(~dev->horkage & fe->param.horkage_on) && | |
340 | !(dev->horkage & fe->param.horkage_off)) | |
341 | continue; | |
342 | ||
343 | dev->horkage |= fe->param.horkage_on; | |
344 | dev->horkage &= ~fe->param.horkage_off; | |
345 | ||
346 | ata_dev_printk(dev, KERN_NOTICE, | |
347 | "FORCE: horkage modified (%s)\n", fe->param.name); | |
348 | } | |
349 | } | |
350 | ||
436d34b3 TH |
351 | /** |
352 | * atapi_cmd_type - Determine ATAPI command type from SCSI opcode | |
353 | * @opcode: SCSI opcode | |
354 | * | |
355 | * Determine ATAPI command type from @opcode. | |
356 | * | |
357 | * LOCKING: | |
358 | * None. | |
359 | * | |
360 | * RETURNS: | |
361 | * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} | |
362 | */ | |
363 | int atapi_cmd_type(u8 opcode) | |
364 | { | |
365 | switch (opcode) { | |
366 | case GPCMD_READ_10: | |
367 | case GPCMD_READ_12: | |
368 | return ATAPI_READ; | |
369 | ||
370 | case GPCMD_WRITE_10: | |
371 | case GPCMD_WRITE_12: | |
372 | case GPCMD_WRITE_AND_VERIFY_10: | |
373 | return ATAPI_WRITE; | |
374 | ||
375 | case GPCMD_READ_CD: | |
376 | case GPCMD_READ_CD_MSF: | |
377 | return ATAPI_READ_CD; | |
378 | ||
e52dcc48 TH |
379 | case ATA_16: |
380 | case ATA_12: | |
381 | if (atapi_passthru16) | |
382 | return ATAPI_PASS_THRU; | |
383 | /* fall thru */ | |
436d34b3 TH |
384 | default: |
385 | return ATAPI_MISC; | |
386 | } | |
387 | } | |
388 | ||
624d5c51 TH |
389 | /** |
390 | * ata_noop_irq_clear - Noop placeholder for irq_clear | |
391 | * @ap: Port associated with this ATA transaction. | |
392 | */ | |
393 | void ata_noop_irq_clear(struct ata_port *ap) | |
394 | { | |
395 | } | |
396 | ||
1da177e4 LT |
397 | /** |
398 | * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure | |
399 | * @tf: Taskfile to convert | |
1da177e4 | 400 | * @pmp: Port multiplier port |
9977126c TH |
401 | * @is_cmd: This FIS is for command |
402 | * @fis: Buffer into which data will output | |
1da177e4 LT |
403 | * |
404 | * Converts a standard ATA taskfile to a Serial ATA | |
405 | * FIS structure (Register - Host to Device). | |
406 | * | |
407 | * LOCKING: | |
408 | * Inherited from caller. | |
409 | */ | |
9977126c | 410 | void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
1da177e4 | 411 | { |
9977126c TH |
412 | fis[0] = 0x27; /* Register - Host to Device FIS */ |
413 | fis[1] = pmp & 0xf; /* Port multiplier number*/ | |
414 | if (is_cmd) | |
415 | fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ | |
416 | ||
1da177e4 LT |
417 | fis[2] = tf->command; |
418 | fis[3] = tf->feature; | |
419 | ||
420 | fis[4] = tf->lbal; | |
421 | fis[5] = tf->lbam; | |
422 | fis[6] = tf->lbah; | |
423 | fis[7] = tf->device; | |
424 | ||
425 | fis[8] = tf->hob_lbal; | |
426 | fis[9] = tf->hob_lbam; | |
427 | fis[10] = tf->hob_lbah; | |
428 | fis[11] = tf->hob_feature; | |
429 | ||
430 | fis[12] = tf->nsect; | |
431 | fis[13] = tf->hob_nsect; | |
432 | fis[14] = 0; | |
433 | fis[15] = tf->ctl; | |
434 | ||
435 | fis[16] = 0; | |
436 | fis[17] = 0; | |
437 | fis[18] = 0; | |
438 | fis[19] = 0; | |
439 | } | |
440 | ||
441 | /** | |
442 | * ata_tf_from_fis - Convert SATA FIS to ATA taskfile | |
443 | * @fis: Buffer from which data will be input | |
444 | * @tf: Taskfile to output | |
445 | * | |
e12a1be6 | 446 | * Converts a serial ATA FIS structure to a standard ATA taskfile. |
1da177e4 LT |
447 | * |
448 | * LOCKING: | |
449 | * Inherited from caller. | |
450 | */ | |
451 | ||
057ace5e | 452 | void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
1da177e4 LT |
453 | { |
454 | tf->command = fis[2]; /* status */ | |
455 | tf->feature = fis[3]; /* error */ | |
456 | ||
457 | tf->lbal = fis[4]; | |
458 | tf->lbam = fis[5]; | |
459 | tf->lbah = fis[6]; | |
460 | tf->device = fis[7]; | |
461 | ||
462 | tf->hob_lbal = fis[8]; | |
463 | tf->hob_lbam = fis[9]; | |
464 | tf->hob_lbah = fis[10]; | |
465 | ||
466 | tf->nsect = fis[12]; | |
467 | tf->hob_nsect = fis[13]; | |
468 | } | |
469 | ||
8cbd6df1 AL |
470 | static const u8 ata_rw_cmds[] = { |
471 | /* pio multi */ | |
472 | ATA_CMD_READ_MULTI, | |
473 | ATA_CMD_WRITE_MULTI, | |
474 | ATA_CMD_READ_MULTI_EXT, | |
475 | ATA_CMD_WRITE_MULTI_EXT, | |
9a3dccc4 TH |
476 | 0, |
477 | 0, | |
478 | 0, | |
479 | ATA_CMD_WRITE_MULTI_FUA_EXT, | |
8cbd6df1 AL |
480 | /* pio */ |
481 | ATA_CMD_PIO_READ, | |
482 | ATA_CMD_PIO_WRITE, | |
483 | ATA_CMD_PIO_READ_EXT, | |
484 | ATA_CMD_PIO_WRITE_EXT, | |
9a3dccc4 TH |
485 | 0, |
486 | 0, | |
487 | 0, | |
488 | 0, | |
8cbd6df1 AL |
489 | /* dma */ |
490 | ATA_CMD_READ, | |
491 | ATA_CMD_WRITE, | |
492 | ATA_CMD_READ_EXT, | |
9a3dccc4 TH |
493 | ATA_CMD_WRITE_EXT, |
494 | 0, | |
495 | 0, | |
496 | 0, | |
497 | ATA_CMD_WRITE_FUA_EXT | |
8cbd6df1 | 498 | }; |
1da177e4 LT |
499 | |
500 | /** | |
8cbd6df1 | 501 | * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
bd056d7e TH |
502 | * @tf: command to examine and configure |
503 | * @dev: device tf belongs to | |
1da177e4 | 504 | * |
2e9edbf8 | 505 | * Examine the device configuration and tf->flags to calculate |
8cbd6df1 | 506 | * the proper read/write commands and protocol to use. |
1da177e4 LT |
507 | * |
508 | * LOCKING: | |
509 | * caller. | |
510 | */ | |
bd056d7e | 511 | static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
1da177e4 | 512 | { |
9a3dccc4 | 513 | u8 cmd; |
1da177e4 | 514 | |
9a3dccc4 | 515 | int index, fua, lba48, write; |
2e9edbf8 | 516 | |
9a3dccc4 | 517 | fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
8cbd6df1 AL |
518 | lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
519 | write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; | |
1da177e4 | 520 | |
8cbd6df1 AL |
521 | if (dev->flags & ATA_DFLAG_PIO) { |
522 | tf->protocol = ATA_PROT_PIO; | |
9a3dccc4 | 523 | index = dev->multi_count ? 0 : 8; |
9af5c9c9 | 524 | } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
8d238e01 AC |
525 | /* Unable to use DMA due to host limitation */ |
526 | tf->protocol = ATA_PROT_PIO; | |
0565c26d | 527 | index = dev->multi_count ? 0 : 8; |
8cbd6df1 AL |
528 | } else { |
529 | tf->protocol = ATA_PROT_DMA; | |
9a3dccc4 | 530 | index = 16; |
8cbd6df1 | 531 | } |
1da177e4 | 532 | |
9a3dccc4 TH |
533 | cmd = ata_rw_cmds[index + fua + lba48 + write]; |
534 | if (cmd) { | |
535 | tf->command = cmd; | |
536 | return 0; | |
537 | } | |
538 | return -1; | |
1da177e4 LT |
539 | } |
540 | ||
35b649fe TH |
541 | /** |
542 | * ata_tf_read_block - Read block address from ATA taskfile | |
543 | * @tf: ATA taskfile of interest | |
544 | * @dev: ATA device @tf belongs to | |
545 | * | |
546 | * LOCKING: | |
547 | * None. | |
548 | * | |
549 | * Read block address from @tf. This function can handle all | |
550 | * three address formats - LBA, LBA48 and CHS. tf->protocol and | |
551 | * flags select the address format to use. | |
552 | * | |
553 | * RETURNS: | |
554 | * Block address read from @tf. | |
555 | */ | |
556 | u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) | |
557 | { | |
558 | u64 block = 0; | |
559 | ||
560 | if (tf->flags & ATA_TFLAG_LBA) { | |
561 | if (tf->flags & ATA_TFLAG_LBA48) { | |
562 | block |= (u64)tf->hob_lbah << 40; | |
563 | block |= (u64)tf->hob_lbam << 32; | |
564 | block |= tf->hob_lbal << 24; | |
565 | } else | |
566 | block |= (tf->device & 0xf) << 24; | |
567 | ||
568 | block |= tf->lbah << 16; | |
569 | block |= tf->lbam << 8; | |
570 | block |= tf->lbal; | |
571 | } else { | |
572 | u32 cyl, head, sect; | |
573 | ||
574 | cyl = tf->lbam | (tf->lbah << 8); | |
575 | head = tf->device & 0xf; | |
576 | sect = tf->lbal; | |
577 | ||
578 | block = (cyl * dev->heads + head) * dev->sectors + sect; | |
579 | } | |
580 | ||
581 | return block; | |
582 | } | |
583 | ||
bd056d7e TH |
584 | /** |
585 | * ata_build_rw_tf - Build ATA taskfile for given read/write request | |
586 | * @tf: Target ATA taskfile | |
587 | * @dev: ATA device @tf belongs to | |
588 | * @block: Block address | |
589 | * @n_block: Number of blocks | |
590 | * @tf_flags: RW/FUA etc... | |
591 | * @tag: tag | |
592 | * | |
593 | * LOCKING: | |
594 | * None. | |
595 | * | |
596 | * Build ATA taskfile @tf for read/write request described by | |
597 | * @block, @n_block, @tf_flags and @tag on @dev. | |
598 | * | |
599 | * RETURNS: | |
600 | * | |
601 | * 0 on success, -ERANGE if the request is too large for @dev, | |
602 | * -EINVAL if the request is invalid. | |
603 | */ | |
604 | int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, | |
605 | u64 block, u32 n_block, unsigned int tf_flags, | |
606 | unsigned int tag) | |
607 | { | |
608 | tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
609 | tf->flags |= tf_flags; | |
610 | ||
6d1245bf | 611 | if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
bd056d7e TH |
612 | /* yay, NCQ */ |
613 | if (!lba_48_ok(block, n_block)) | |
614 | return -ERANGE; | |
615 | ||
616 | tf->protocol = ATA_PROT_NCQ; | |
617 | tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; | |
618 | ||
619 | if (tf->flags & ATA_TFLAG_WRITE) | |
620 | tf->command = ATA_CMD_FPDMA_WRITE; | |
621 | else | |
622 | tf->command = ATA_CMD_FPDMA_READ; | |
623 | ||
624 | tf->nsect = tag << 3; | |
625 | tf->hob_feature = (n_block >> 8) & 0xff; | |
626 | tf->feature = n_block & 0xff; | |
627 | ||
628 | tf->hob_lbah = (block >> 40) & 0xff; | |
629 | tf->hob_lbam = (block >> 32) & 0xff; | |
630 | tf->hob_lbal = (block >> 24) & 0xff; | |
631 | tf->lbah = (block >> 16) & 0xff; | |
632 | tf->lbam = (block >> 8) & 0xff; | |
633 | tf->lbal = block & 0xff; | |
634 | ||
635 | tf->device = 1 << 6; | |
636 | if (tf->flags & ATA_TFLAG_FUA) | |
637 | tf->device |= 1 << 7; | |
638 | } else if (dev->flags & ATA_DFLAG_LBA) { | |
639 | tf->flags |= ATA_TFLAG_LBA; | |
640 | ||
641 | if (lba_28_ok(block, n_block)) { | |
642 | /* use LBA28 */ | |
643 | tf->device |= (block >> 24) & 0xf; | |
644 | } else if (lba_48_ok(block, n_block)) { | |
645 | if (!(dev->flags & ATA_DFLAG_LBA48)) | |
646 | return -ERANGE; | |
647 | ||
648 | /* use LBA48 */ | |
649 | tf->flags |= ATA_TFLAG_LBA48; | |
650 | ||
651 | tf->hob_nsect = (n_block >> 8) & 0xff; | |
652 | ||
653 | tf->hob_lbah = (block >> 40) & 0xff; | |
654 | tf->hob_lbam = (block >> 32) & 0xff; | |
655 | tf->hob_lbal = (block >> 24) & 0xff; | |
656 | } else | |
657 | /* request too large even for LBA48 */ | |
658 | return -ERANGE; | |
659 | ||
660 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
661 | return -EINVAL; | |
662 | ||
663 | tf->nsect = n_block & 0xff; | |
664 | ||
665 | tf->lbah = (block >> 16) & 0xff; | |
666 | tf->lbam = (block >> 8) & 0xff; | |
667 | tf->lbal = block & 0xff; | |
668 | ||
669 | tf->device |= ATA_LBA; | |
670 | } else { | |
671 | /* CHS */ | |
672 | u32 sect, head, cyl, track; | |
673 | ||
674 | /* The request -may- be too large for CHS addressing. */ | |
675 | if (!lba_28_ok(block, n_block)) | |
676 | return -ERANGE; | |
677 | ||
678 | if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) | |
679 | return -EINVAL; | |
680 | ||
681 | /* Convert LBA to CHS */ | |
682 | track = (u32)block / dev->sectors; | |
683 | cyl = track / dev->heads; | |
684 | head = track % dev->heads; | |
685 | sect = (u32)block % dev->sectors + 1; | |
686 | ||
687 | DPRINTK("block %u track %u cyl %u head %u sect %u\n", | |
688 | (u32)block, track, cyl, head, sect); | |
689 | ||
690 | /* Check whether the converted CHS can fit. | |
691 | Cylinder: 0-65535 | |
692 | Head: 0-15 | |
693 | Sector: 1-255*/ | |
694 | if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) | |
695 | return -ERANGE; | |
696 | ||
697 | tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ | |
698 | tf->lbal = sect; | |
699 | tf->lbam = cyl; | |
700 | tf->lbah = cyl >> 8; | |
701 | tf->device |= head; | |
702 | } | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
cb95d562 TH |
707 | /** |
708 | * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask | |
709 | * @pio_mask: pio_mask | |
710 | * @mwdma_mask: mwdma_mask | |
711 | * @udma_mask: udma_mask | |
712 | * | |
713 | * Pack @pio_mask, @mwdma_mask and @udma_mask into a single | |
714 | * unsigned int xfer_mask. | |
715 | * | |
716 | * LOCKING: | |
717 | * None. | |
718 | * | |
719 | * RETURNS: | |
720 | * Packed xfer_mask. | |
721 | */ | |
7dc951ae TH |
722 | unsigned long ata_pack_xfermask(unsigned long pio_mask, |
723 | unsigned long mwdma_mask, | |
724 | unsigned long udma_mask) | |
cb95d562 TH |
725 | { |
726 | return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | | |
727 | ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | | |
728 | ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); | |
729 | } | |
730 | ||
c0489e4e TH |
731 | /** |
732 | * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks | |
733 | * @xfer_mask: xfer_mask to unpack | |
734 | * @pio_mask: resulting pio_mask | |
735 | * @mwdma_mask: resulting mwdma_mask | |
736 | * @udma_mask: resulting udma_mask | |
737 | * | |
738 | * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. | |
739 | * Any NULL distination masks will be ignored. | |
740 | */ | |
7dc951ae TH |
741 | void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
742 | unsigned long *mwdma_mask, unsigned long *udma_mask) | |
c0489e4e TH |
743 | { |
744 | if (pio_mask) | |
745 | *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; | |
746 | if (mwdma_mask) | |
747 | *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; | |
748 | if (udma_mask) | |
749 | *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; | |
750 | } | |
751 | ||
cb95d562 | 752 | static const struct ata_xfer_ent { |
be9a50c8 | 753 | int shift, bits; |
cb95d562 TH |
754 | u8 base; |
755 | } ata_xfer_tbl[] = { | |
70cd071e TH |
756 | { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
757 | { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, | |
758 | { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, | |
cb95d562 TH |
759 | { -1, }, |
760 | }; | |
761 | ||
762 | /** | |
763 | * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask | |
764 | * @xfer_mask: xfer_mask of interest | |
765 | * | |
766 | * Return matching XFER_* value for @xfer_mask. Only the highest | |
767 | * bit of @xfer_mask is considered. | |
768 | * | |
769 | * LOCKING: | |
770 | * None. | |
771 | * | |
772 | * RETURNS: | |
70cd071e | 773 | * Matching XFER_* value, 0xff if no match found. |
cb95d562 | 774 | */ |
7dc951ae | 775 | u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
cb95d562 TH |
776 | { |
777 | int highbit = fls(xfer_mask) - 1; | |
778 | const struct ata_xfer_ent *ent; | |
779 | ||
780 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
781 | if (highbit >= ent->shift && highbit < ent->shift + ent->bits) | |
782 | return ent->base + highbit - ent->shift; | |
70cd071e | 783 | return 0xff; |
cb95d562 TH |
784 | } |
785 | ||
786 | /** | |
787 | * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* | |
788 | * @xfer_mode: XFER_* of interest | |
789 | * | |
790 | * Return matching xfer_mask for @xfer_mode. | |
791 | * | |
792 | * LOCKING: | |
793 | * None. | |
794 | * | |
795 | * RETURNS: | |
796 | * Matching xfer_mask, 0 if no match found. | |
797 | */ | |
7dc951ae | 798 | unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
cb95d562 TH |
799 | { |
800 | const struct ata_xfer_ent *ent; | |
801 | ||
802 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
803 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
70cd071e TH |
804 | return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
805 | & ~((1 << ent->shift) - 1); | |
cb95d562 TH |
806 | return 0; |
807 | } | |
808 | ||
809 | /** | |
810 | * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* | |
811 | * @xfer_mode: XFER_* of interest | |
812 | * | |
813 | * Return matching xfer_shift for @xfer_mode. | |
814 | * | |
815 | * LOCKING: | |
816 | * None. | |
817 | * | |
818 | * RETURNS: | |
819 | * Matching xfer_shift, -1 if no match found. | |
820 | */ | |
7dc951ae | 821 | int ata_xfer_mode2shift(unsigned long xfer_mode) |
cb95d562 TH |
822 | { |
823 | const struct ata_xfer_ent *ent; | |
824 | ||
825 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
826 | if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) | |
827 | return ent->shift; | |
828 | return -1; | |
829 | } | |
830 | ||
1da177e4 | 831 | /** |
1da7b0d0 TH |
832 | * ata_mode_string - convert xfer_mask to string |
833 | * @xfer_mask: mask of bits supported; only highest bit counts. | |
1da177e4 LT |
834 | * |
835 | * Determine string which represents the highest speed | |
1da7b0d0 | 836 | * (highest bit in @modemask). |
1da177e4 LT |
837 | * |
838 | * LOCKING: | |
839 | * None. | |
840 | * | |
841 | * RETURNS: | |
842 | * Constant C string representing highest speed listed in | |
1da7b0d0 | 843 | * @mode_mask, or the constant C string "<n/a>". |
1da177e4 | 844 | */ |
7dc951ae | 845 | const char *ata_mode_string(unsigned long xfer_mask) |
1da177e4 | 846 | { |
75f554bc TH |
847 | static const char * const xfer_mode_str[] = { |
848 | "PIO0", | |
849 | "PIO1", | |
850 | "PIO2", | |
851 | "PIO3", | |
852 | "PIO4", | |
b352e57d AC |
853 | "PIO5", |
854 | "PIO6", | |
75f554bc TH |
855 | "MWDMA0", |
856 | "MWDMA1", | |
857 | "MWDMA2", | |
b352e57d AC |
858 | "MWDMA3", |
859 | "MWDMA4", | |
75f554bc TH |
860 | "UDMA/16", |
861 | "UDMA/25", | |
862 | "UDMA/33", | |
863 | "UDMA/44", | |
864 | "UDMA/66", | |
865 | "UDMA/100", | |
866 | "UDMA/133", | |
867 | "UDMA7", | |
868 | }; | |
1da7b0d0 | 869 | int highbit; |
1da177e4 | 870 | |
1da7b0d0 TH |
871 | highbit = fls(xfer_mask) - 1; |
872 | if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) | |
873 | return xfer_mode_str[highbit]; | |
1da177e4 | 874 | return "<n/a>"; |
1da177e4 LT |
875 | } |
876 | ||
4c360c81 TH |
877 | static const char *sata_spd_string(unsigned int spd) |
878 | { | |
879 | static const char * const spd_str[] = { | |
880 | "1.5 Gbps", | |
881 | "3.0 Gbps", | |
882 | }; | |
883 | ||
884 | if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) | |
885 | return "<unknown>"; | |
886 | return spd_str[spd - 1]; | |
887 | } | |
888 | ||
3373efd8 | 889 | void ata_dev_disable(struct ata_device *dev) |
0b8efb0a | 890 | { |
09d7f9b0 | 891 | if (ata_dev_enabled(dev)) { |
9af5c9c9 | 892 | if (ata_msg_drv(dev->link->ap)) |
09d7f9b0 | 893 | ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
562f0c2d | 894 | ata_acpi_on_disable(dev); |
4ae72a1e TH |
895 | ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
896 | ATA_DNXFER_QUIET); | |
0b8efb0a TH |
897 | dev->class++; |
898 | } | |
899 | } | |
900 | ||
ca77329f KCA |
901 | static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) |
902 | { | |
903 | struct ata_link *link = dev->link; | |
904 | struct ata_port *ap = link->ap; | |
905 | u32 scontrol; | |
906 | unsigned int err_mask; | |
907 | int rc; | |
908 | ||
909 | /* | |
910 | * disallow DIPM for drivers which haven't set | |
911 | * ATA_FLAG_IPM. This is because when DIPM is enabled, | |
912 | * phy ready will be set in the interrupt status on | |
913 | * state changes, which will cause some drivers to | |
914 | * think there are errors - additionally drivers will | |
915 | * need to disable hot plug. | |
916 | */ | |
917 | if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { | |
918 | ap->pm_policy = NOT_AVAILABLE; | |
919 | return -EINVAL; | |
920 | } | |
921 | ||
922 | /* | |
923 | * For DIPM, we will only enable it for the | |
924 | * min_power setting. | |
925 | * | |
926 | * Why? Because Disks are too stupid to know that | |
927 | * If the host rejects a request to go to SLUMBER | |
928 | * they should retry at PARTIAL, and instead it | |
929 | * just would give up. So, for medium_power to | |
930 | * work at all, we need to only allow HIPM. | |
931 | */ | |
932 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
933 | if (rc) | |
934 | return rc; | |
935 | ||
936 | switch (policy) { | |
937 | case MIN_POWER: | |
938 | /* no restrictions on IPM transitions */ | |
939 | scontrol &= ~(0x3 << 8); | |
940 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
941 | if (rc) | |
942 | return rc; | |
943 | ||
944 | /* enable DIPM */ | |
945 | if (dev->flags & ATA_DFLAG_DIPM) | |
946 | err_mask = ata_dev_set_feature(dev, | |
947 | SETFEATURES_SATA_ENABLE, SATA_DIPM); | |
948 | break; | |
949 | case MEDIUM_POWER: | |
950 | /* allow IPM to PARTIAL */ | |
951 | scontrol &= ~(0x1 << 8); | |
952 | scontrol |= (0x2 << 8); | |
953 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
954 | if (rc) | |
955 | return rc; | |
956 | ||
f5456b63 KCA |
957 | /* |
958 | * we don't have to disable DIPM since IPM flags | |
959 | * disallow transitions to SLUMBER, which effectively | |
960 | * disable DIPM if it does not support PARTIAL | |
961 | */ | |
ca77329f KCA |
962 | break; |
963 | case NOT_AVAILABLE: | |
964 | case MAX_PERFORMANCE: | |
965 | /* disable all IPM transitions */ | |
966 | scontrol |= (0x3 << 8); | |
967 | rc = sata_scr_write(link, SCR_CONTROL, scontrol); | |
968 | if (rc) | |
969 | return rc; | |
970 | ||
f5456b63 KCA |
971 | /* |
972 | * we don't have to disable DIPM since IPM flags | |
973 | * disallow all transitions which effectively | |
974 | * disable DIPM anyway. | |
975 | */ | |
ca77329f KCA |
976 | break; |
977 | } | |
978 | ||
979 | /* FIXME: handle SET FEATURES failure */ | |
980 | (void) err_mask; | |
981 | ||
982 | return 0; | |
983 | } | |
984 | ||
985 | /** | |
986 | * ata_dev_enable_pm - enable SATA interface power management | |
48166fd9 SH |
987 | * @dev: device to enable power management |
988 | * @policy: the link power management policy | |
ca77329f KCA |
989 | * |
990 | * Enable SATA Interface power management. This will enable | |
991 | * Device Interface Power Management (DIPM) for min_power | |
992 | * policy, and then call driver specific callbacks for | |
993 | * enabling Host Initiated Power management. | |
994 | * | |
995 | * Locking: Caller. | |
996 | * Returns: -EINVAL if IPM is not supported, 0 otherwise. | |
997 | */ | |
998 | void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) | |
999 | { | |
1000 | int rc = 0; | |
1001 | struct ata_port *ap = dev->link->ap; | |
1002 | ||
1003 | /* set HIPM first, then DIPM */ | |
1004 | if (ap->ops->enable_pm) | |
1005 | rc = ap->ops->enable_pm(ap, policy); | |
1006 | if (rc) | |
1007 | goto enable_pm_out; | |
1008 | rc = ata_dev_set_dipm(dev, policy); | |
1009 | ||
1010 | enable_pm_out: | |
1011 | if (rc) | |
1012 | ap->pm_policy = MAX_PERFORMANCE; | |
1013 | else | |
1014 | ap->pm_policy = policy; | |
1015 | return /* rc */; /* hopefully we can use 'rc' eventually */ | |
1016 | } | |
1017 | ||
1992a5ed | 1018 | #ifdef CONFIG_PM |
ca77329f KCA |
1019 | /** |
1020 | * ata_dev_disable_pm - disable SATA interface power management | |
48166fd9 | 1021 | * @dev: device to disable power management |
ca77329f KCA |
1022 | * |
1023 | * Disable SATA Interface power management. This will disable | |
1024 | * Device Interface Power Management (DIPM) without changing | |
1025 | * policy, call driver specific callbacks for disabling Host | |
1026 | * Initiated Power management. | |
1027 | * | |
1028 | * Locking: Caller. | |
1029 | * Returns: void | |
1030 | */ | |
1031 | static void ata_dev_disable_pm(struct ata_device *dev) | |
1032 | { | |
1033 | struct ata_port *ap = dev->link->ap; | |
1034 | ||
1035 | ata_dev_set_dipm(dev, MAX_PERFORMANCE); | |
1036 | if (ap->ops->disable_pm) | |
1037 | ap->ops->disable_pm(ap); | |
1038 | } | |
1992a5ed | 1039 | #endif /* CONFIG_PM */ |
ca77329f KCA |
1040 | |
1041 | void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) | |
1042 | { | |
1043 | ap->pm_policy = policy; | |
3ec25ebd | 1044 | ap->link.eh_info.action |= ATA_EH_LPM; |
ca77329f KCA |
1045 | ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; |
1046 | ata_port_schedule_eh(ap); | |
1047 | } | |
1048 | ||
1992a5ed | 1049 | #ifdef CONFIG_PM |
ca77329f KCA |
1050 | static void ata_lpm_enable(struct ata_host *host) |
1051 | { | |
1052 | struct ata_link *link; | |
1053 | struct ata_port *ap; | |
1054 | struct ata_device *dev; | |
1055 | int i; | |
1056 | ||
1057 | for (i = 0; i < host->n_ports; i++) { | |
1058 | ap = host->ports[i]; | |
1059 | ata_port_for_each_link(link, ap) { | |
1060 | ata_link_for_each_dev(dev, link) | |
1061 | ata_dev_disable_pm(dev); | |
1062 | } | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | static void ata_lpm_disable(struct ata_host *host) | |
1067 | { | |
1068 | int i; | |
1069 | ||
1070 | for (i = 0; i < host->n_ports; i++) { | |
1071 | struct ata_port *ap = host->ports[i]; | |
1072 | ata_lpm_schedule(ap, ap->pm_policy); | |
1073 | } | |
1074 | } | |
1992a5ed | 1075 | #endif /* CONFIG_PM */ |
ca77329f | 1076 | |
1da177e4 LT |
1077 | /** |
1078 | * ata_dev_classify - determine device type based on ATA-spec signature | |
1079 | * @tf: ATA taskfile register set for device to be identified | |
1080 | * | |
1081 | * Determine from taskfile register contents whether a device is | |
1082 | * ATA or ATAPI, as per "Signature and persistence" section | |
1083 | * of ATA/PI spec (volume 1, sect 5.14). | |
1084 | * | |
1085 | * LOCKING: | |
1086 | * None. | |
1087 | * | |
1088 | * RETURNS: | |
633273a3 TH |
1089 | * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
1090 | * %ATA_DEV_UNKNOWN the event of failure. | |
1da177e4 | 1091 | */ |
057ace5e | 1092 | unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
1da177e4 LT |
1093 | { |
1094 | /* Apple's open source Darwin code hints that some devices only | |
1095 | * put a proper signature into the LBA mid/high registers, | |
1096 | * So, we only check those. It's sufficient for uniqueness. | |
633273a3 TH |
1097 | * |
1098 | * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate | |
1099 | * signatures for ATA and ATAPI devices attached on SerialATA, | |
1100 | * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA | |
1101 | * spec has never mentioned about using different signatures | |
1102 | * for ATA/ATAPI devices. Then, Serial ATA II: Port | |
1103 | * Multiplier specification began to use 0x69/0x96 to identify | |
1104 | * port multpliers and 0x3c/0xc3 to identify SEMB device. | |
1105 | * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and | |
1106 | * 0x69/0x96 shortly and described them as reserved for | |
1107 | * SerialATA. | |
1108 | * | |
1109 | * We follow the current spec and consider that 0x69/0x96 | |
1110 | * identifies a port multiplier and 0x3c/0xc3 a SEMB device. | |
1da177e4 | 1111 | */ |
633273a3 | 1112 | if ((tf->lbam == 0) && (tf->lbah == 0)) { |
1da177e4 LT |
1113 | DPRINTK("found ATA device by sig\n"); |
1114 | return ATA_DEV_ATA; | |
1115 | } | |
1116 | ||
633273a3 | 1117 | if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
1da177e4 LT |
1118 | DPRINTK("found ATAPI device by sig\n"); |
1119 | return ATA_DEV_ATAPI; | |
1120 | } | |
1121 | ||
633273a3 TH |
1122 | if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
1123 | DPRINTK("found PMP device by sig\n"); | |
1124 | return ATA_DEV_PMP; | |
1125 | } | |
1126 | ||
1127 | if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { | |
2dcb407e | 1128 | printk(KERN_INFO "ata: SEMB device ignored\n"); |
633273a3 TH |
1129 | return ATA_DEV_SEMB_UNSUP; /* not yet */ |
1130 | } | |
1131 | ||
1da177e4 LT |
1132 | DPRINTK("unknown device\n"); |
1133 | return ATA_DEV_UNKNOWN; | |
1134 | } | |
1135 | ||
1da177e4 | 1136 | /** |
6a62a04d | 1137 | * ata_id_string - Convert IDENTIFY DEVICE page into string |
1da177e4 LT |
1138 | * @id: IDENTIFY DEVICE results we will examine |
1139 | * @s: string into which data is output | |
1140 | * @ofs: offset into identify device page | |
1141 | * @len: length of string to return. must be an even number. | |
1142 | * | |
1143 | * The strings in the IDENTIFY DEVICE page are broken up into | |
1144 | * 16-bit chunks. Run through the string, and output each | |
1145 | * 8-bit chunk linearly, regardless of platform. | |
1146 | * | |
1147 | * LOCKING: | |
1148 | * caller. | |
1149 | */ | |
1150 | ||
6a62a04d TH |
1151 | void ata_id_string(const u16 *id, unsigned char *s, |
1152 | unsigned int ofs, unsigned int len) | |
1da177e4 LT |
1153 | { |
1154 | unsigned int c; | |
1155 | ||
1156 | while (len > 0) { | |
1157 | c = id[ofs] >> 8; | |
1158 | *s = c; | |
1159 | s++; | |
1160 | ||
1161 | c = id[ofs] & 0xff; | |
1162 | *s = c; | |
1163 | s++; | |
1164 | ||
1165 | ofs++; | |
1166 | len -= 2; | |
1167 | } | |
1168 | } | |
1169 | ||
0e949ff3 | 1170 | /** |
6a62a04d | 1171 | * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
0e949ff3 TH |
1172 | * @id: IDENTIFY DEVICE results we will examine |
1173 | * @s: string into which data is output | |
1174 | * @ofs: offset into identify device page | |
1175 | * @len: length of string to return. must be an odd number. | |
1176 | * | |
6a62a04d | 1177 | * This function is identical to ata_id_string except that it |
0e949ff3 TH |
1178 | * trims trailing spaces and terminates the resulting string with |
1179 | * null. @len must be actual maximum length (even number) + 1. | |
1180 | * | |
1181 | * LOCKING: | |
1182 | * caller. | |
1183 | */ | |
6a62a04d TH |
1184 | void ata_id_c_string(const u16 *id, unsigned char *s, |
1185 | unsigned int ofs, unsigned int len) | |
0e949ff3 TH |
1186 | { |
1187 | unsigned char *p; | |
1188 | ||
1189 | WARN_ON(!(len & 1)); | |
1190 | ||
6a62a04d | 1191 | ata_id_string(id, s, ofs, len - 1); |
0e949ff3 TH |
1192 | |
1193 | p = s + strnlen(s, len - 1); | |
1194 | while (p > s && p[-1] == ' ') | |
1195 | p--; | |
1196 | *p = '\0'; | |
1197 | } | |
0baab86b | 1198 | |
db6f8759 TH |
1199 | static u64 ata_id_n_sectors(const u16 *id) |
1200 | { | |
1201 | if (ata_id_has_lba(id)) { | |
1202 | if (ata_id_has_lba48(id)) | |
1203 | return ata_id_u64(id, 100); | |
1204 | else | |
1205 | return ata_id_u32(id, 60); | |
1206 | } else { | |
1207 | if (ata_id_current_chs_valid(id)) | |
1208 | return ata_id_u32(id, 57); | |
1209 | else | |
1210 | return id[1] * id[3] * id[6]; | |
1211 | } | |
1212 | } | |
1213 | ||
a5987e0a | 1214 | u64 ata_tf_to_lba48(const struct ata_taskfile *tf) |
1e999736 AC |
1215 | { |
1216 | u64 sectors = 0; | |
1217 | ||
1218 | sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; | |
1219 | sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; | |
1220 | sectors |= (tf->hob_lbal & 0xff) << 24; | |
1221 | sectors |= (tf->lbah & 0xff) << 16; | |
1222 | sectors |= (tf->lbam & 0xff) << 8; | |
1223 | sectors |= (tf->lbal & 0xff); | |
1224 | ||
a5987e0a | 1225 | return sectors; |
1e999736 AC |
1226 | } |
1227 | ||
a5987e0a | 1228 | u64 ata_tf_to_lba(const struct ata_taskfile *tf) |
1e999736 AC |
1229 | { |
1230 | u64 sectors = 0; | |
1231 | ||
1232 | sectors |= (tf->device & 0x0f) << 24; | |
1233 | sectors |= (tf->lbah & 0xff) << 16; | |
1234 | sectors |= (tf->lbam & 0xff) << 8; | |
1235 | sectors |= (tf->lbal & 0xff); | |
1236 | ||
a5987e0a | 1237 | return sectors; |
1e999736 AC |
1238 | } |
1239 | ||
1240 | /** | |
c728a914 TH |
1241 | * ata_read_native_max_address - Read native max address |
1242 | * @dev: target device | |
1243 | * @max_sectors: out parameter for the result native max address | |
1e999736 | 1244 | * |
c728a914 TH |
1245 | * Perform an LBA48 or LBA28 native size query upon the device in |
1246 | * question. | |
1e999736 | 1247 | * |
c728a914 TH |
1248 | * RETURNS: |
1249 | * 0 on success, -EACCES if command is aborted by the drive. | |
1250 | * -EIO on other errors. | |
1e999736 | 1251 | */ |
c728a914 | 1252 | static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
1e999736 | 1253 | { |
c728a914 | 1254 | unsigned int err_mask; |
1e999736 | 1255 | struct ata_taskfile tf; |
c728a914 | 1256 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1257 | |
1258 | ata_tf_init(dev, &tf); | |
1259 | ||
c728a914 | 1260 | /* always clear all address registers */ |
1e999736 | 1261 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
1e999736 | 1262 | |
c728a914 TH |
1263 | if (lba48) { |
1264 | tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; | |
1265 | tf.flags |= ATA_TFLAG_LBA48; | |
1266 | } else | |
1267 | tf.command = ATA_CMD_READ_NATIVE_MAX; | |
1e999736 | 1268 | |
1e999736 | 1269 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 TH |
1270 | tf.device |= ATA_LBA; |
1271 | ||
2b789108 | 1272 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1273 | if (err_mask) { |
1274 | ata_dev_printk(dev, KERN_WARNING, "failed to read native " | |
1275 | "max address (err_mask=0x%x)\n", err_mask); | |
1276 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
1277 | return -EACCES; | |
1278 | return -EIO; | |
1279 | } | |
1e999736 | 1280 | |
c728a914 | 1281 | if (lba48) |
a5987e0a | 1282 | *max_sectors = ata_tf_to_lba48(&tf) + 1; |
c728a914 | 1283 | else |
a5987e0a | 1284 | *max_sectors = ata_tf_to_lba(&tf) + 1; |
2dcb407e | 1285 | if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
93328e11 | 1286 | (*max_sectors)--; |
c728a914 | 1287 | return 0; |
1e999736 AC |
1288 | } |
1289 | ||
1290 | /** | |
c728a914 TH |
1291 | * ata_set_max_sectors - Set max sectors |
1292 | * @dev: target device | |
6b38d1d1 | 1293 | * @new_sectors: new max sectors value to set for the device |
1e999736 | 1294 | * |
c728a914 TH |
1295 | * Set max sectors of @dev to @new_sectors. |
1296 | * | |
1297 | * RETURNS: | |
1298 | * 0 on success, -EACCES if command is aborted or denied (due to | |
1299 | * previous non-volatile SET_MAX) by the drive. -EIO on other | |
1300 | * errors. | |
1e999736 | 1301 | */ |
05027adc | 1302 | static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
1e999736 | 1303 | { |
c728a914 | 1304 | unsigned int err_mask; |
1e999736 | 1305 | struct ata_taskfile tf; |
c728a914 | 1306 | int lba48 = ata_id_has_lba48(dev->id); |
1e999736 AC |
1307 | |
1308 | new_sectors--; | |
1309 | ||
1310 | ata_tf_init(dev, &tf); | |
1311 | ||
1e999736 | 1312 | tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
c728a914 TH |
1313 | |
1314 | if (lba48) { | |
1315 | tf.command = ATA_CMD_SET_MAX_EXT; | |
1316 | tf.flags |= ATA_TFLAG_LBA48; | |
1317 | ||
1318 | tf.hob_lbal = (new_sectors >> 24) & 0xff; | |
1319 | tf.hob_lbam = (new_sectors >> 32) & 0xff; | |
1320 | tf.hob_lbah = (new_sectors >> 40) & 0xff; | |
1e582ba4 | 1321 | } else { |
c728a914 TH |
1322 | tf.command = ATA_CMD_SET_MAX; |
1323 | ||
1e582ba4 TH |
1324 | tf.device |= (new_sectors >> 24) & 0xf; |
1325 | } | |
1326 | ||
1e999736 | 1327 | tf.protocol |= ATA_PROT_NODATA; |
c728a914 | 1328 | tf.device |= ATA_LBA; |
1e999736 AC |
1329 | |
1330 | tf.lbal = (new_sectors >> 0) & 0xff; | |
1331 | tf.lbam = (new_sectors >> 8) & 0xff; | |
1332 | tf.lbah = (new_sectors >> 16) & 0xff; | |
1e999736 | 1333 | |
2b789108 | 1334 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
c728a914 TH |
1335 | if (err_mask) { |
1336 | ata_dev_printk(dev, KERN_WARNING, "failed to set " | |
1337 | "max address (err_mask=0x%x)\n", err_mask); | |
1338 | if (err_mask == AC_ERR_DEV && | |
1339 | (tf.feature & (ATA_ABORTED | ATA_IDNF))) | |
1340 | return -EACCES; | |
1341 | return -EIO; | |
1342 | } | |
1343 | ||
c728a914 | 1344 | return 0; |
1e999736 AC |
1345 | } |
1346 | ||
1347 | /** | |
1348 | * ata_hpa_resize - Resize a device with an HPA set | |
1349 | * @dev: Device to resize | |
1350 | * | |
1351 | * Read the size of an LBA28 or LBA48 disk with HPA features and resize | |
1352 | * it if required to the full size of the media. The caller must check | |
1353 | * the drive has the HPA feature set enabled. | |
05027adc TH |
1354 | * |
1355 | * RETURNS: | |
1356 | * 0 on success, -errno on failure. | |
1e999736 | 1357 | */ |
05027adc | 1358 | static int ata_hpa_resize(struct ata_device *dev) |
1e999736 | 1359 | { |
05027adc TH |
1360 | struct ata_eh_context *ehc = &dev->link->eh_context; |
1361 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; | |
1362 | u64 sectors = ata_id_n_sectors(dev->id); | |
1363 | u64 native_sectors; | |
c728a914 | 1364 | int rc; |
a617c09f | 1365 | |
05027adc TH |
1366 | /* do we need to do it? */ |
1367 | if (dev->class != ATA_DEV_ATA || | |
1368 | !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || | |
1369 | (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) | |
c728a914 | 1370 | return 0; |
1e999736 | 1371 | |
05027adc TH |
1372 | /* read native max address */ |
1373 | rc = ata_read_native_max_address(dev, &native_sectors); | |
1374 | if (rc) { | |
dda7aba1 TH |
1375 | /* If device aborted the command or HPA isn't going to |
1376 | * be unlocked, skip HPA resizing. | |
05027adc | 1377 | */ |
dda7aba1 | 1378 | if (rc == -EACCES || !ata_ignore_hpa) { |
05027adc | 1379 | ata_dev_printk(dev, KERN_WARNING, "HPA support seems " |
dda7aba1 | 1380 | "broken, skipping HPA handling\n"); |
05027adc TH |
1381 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
1382 | ||
1383 | /* we can continue if device aborted the command */ | |
1384 | if (rc == -EACCES) | |
1385 | rc = 0; | |
1e999736 | 1386 | } |
37301a55 | 1387 | |
05027adc TH |
1388 | return rc; |
1389 | } | |
1390 | ||
1391 | /* nothing to do? */ | |
1392 | if (native_sectors <= sectors || !ata_ignore_hpa) { | |
1393 | if (!print_info || native_sectors == sectors) | |
1394 | return 0; | |
1395 | ||
1396 | if (native_sectors > sectors) | |
1397 | ata_dev_printk(dev, KERN_INFO, | |
1398 | "HPA detected: current %llu, native %llu\n", | |
1399 | (unsigned long long)sectors, | |
1400 | (unsigned long long)native_sectors); | |
1401 | else if (native_sectors < sectors) | |
1402 | ata_dev_printk(dev, KERN_WARNING, | |
1403 | "native sectors (%llu) is smaller than " | |
1404 | "sectors (%llu)\n", | |
1405 | (unsigned long long)native_sectors, | |
1406 | (unsigned long long)sectors); | |
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | /* let's unlock HPA */ | |
1411 | rc = ata_set_max_sectors(dev, native_sectors); | |
1412 | if (rc == -EACCES) { | |
1413 | /* if device aborted the command, skip HPA resizing */ | |
1414 | ata_dev_printk(dev, KERN_WARNING, "device aborted resize " | |
1415 | "(%llu -> %llu), skipping HPA handling\n", | |
1416 | (unsigned long long)sectors, | |
1417 | (unsigned long long)native_sectors); | |
1418 | dev->horkage |= ATA_HORKAGE_BROKEN_HPA; | |
1419 | return 0; | |
1420 | } else if (rc) | |
1421 | return rc; | |
1422 | ||
1423 | /* re-read IDENTIFY data */ | |
1424 | rc = ata_dev_reread_id(dev, 0); | |
1425 | if (rc) { | |
1426 | ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " | |
1427 | "data after HPA resizing\n"); | |
1428 | return rc; | |
1429 | } | |
1430 | ||
1431 | if (print_info) { | |
1432 | u64 new_sectors = ata_id_n_sectors(dev->id); | |
1433 | ata_dev_printk(dev, KERN_INFO, | |
1434 | "HPA unlocked: %llu -> %llu, native %llu\n", | |
1435 | (unsigned long long)sectors, | |
1436 | (unsigned long long)new_sectors, | |
1437 | (unsigned long long)native_sectors); | |
1438 | } | |
1439 | ||
1440 | return 0; | |
1e999736 AC |
1441 | } |
1442 | ||
0baab86b EF |
1443 | /** |
1444 | * ata_noop_dev_select - Select device 0/1 on ATA bus | |
1445 | * @ap: ATA channel to manipulate | |
1446 | * @device: ATA device (numbered from zero) to select | |
1447 | * | |
1448 | * This function performs no actual function. | |
1449 | * | |
1450 | * May be used as the dev_select() entry in ata_port_operations. | |
1451 | * | |
1452 | * LOCKING: | |
1453 | * caller. | |
1454 | */ | |
2dcb407e | 1455 | void ata_noop_dev_select(struct ata_port *ap, unsigned int device) |
1da177e4 LT |
1456 | { |
1457 | } | |
1458 | ||
1da177e4 LT |
1459 | /** |
1460 | * ata_dump_id - IDENTIFY DEVICE info debugging output | |
0bd3300a | 1461 | * @id: IDENTIFY DEVICE page to dump |
1da177e4 | 1462 | * |
0bd3300a TH |
1463 | * Dump selected 16-bit words from the given IDENTIFY DEVICE |
1464 | * page. | |
1da177e4 LT |
1465 | * |
1466 | * LOCKING: | |
1467 | * caller. | |
1468 | */ | |
1469 | ||
0bd3300a | 1470 | static inline void ata_dump_id(const u16 *id) |
1da177e4 LT |
1471 | { |
1472 | DPRINTK("49==0x%04x " | |
1473 | "53==0x%04x " | |
1474 | "63==0x%04x " | |
1475 | "64==0x%04x " | |
1476 | "75==0x%04x \n", | |
0bd3300a TH |
1477 | id[49], |
1478 | id[53], | |
1479 | id[63], | |
1480 | id[64], | |
1481 | id[75]); | |
1da177e4 LT |
1482 | DPRINTK("80==0x%04x " |
1483 | "81==0x%04x " | |
1484 | "82==0x%04x " | |
1485 | "83==0x%04x " | |
1486 | "84==0x%04x \n", | |
0bd3300a TH |
1487 | id[80], |
1488 | id[81], | |
1489 | id[82], | |
1490 | id[83], | |
1491 | id[84]); | |
1da177e4 LT |
1492 | DPRINTK("88==0x%04x " |
1493 | "93==0x%04x\n", | |
0bd3300a TH |
1494 | id[88], |
1495 | id[93]); | |
1da177e4 LT |
1496 | } |
1497 | ||
cb95d562 TH |
1498 | /** |
1499 | * ata_id_xfermask - Compute xfermask from the given IDENTIFY data | |
1500 | * @id: IDENTIFY data to compute xfer mask from | |
1501 | * | |
1502 | * Compute the xfermask for this device. This is not as trivial | |
1503 | * as it seems if we must consider early devices correctly. | |
1504 | * | |
1505 | * FIXME: pre IDE drive timing (do we care ?). | |
1506 | * | |
1507 | * LOCKING: | |
1508 | * None. | |
1509 | * | |
1510 | * RETURNS: | |
1511 | * Computed xfermask | |
1512 | */ | |
7dc951ae | 1513 | unsigned long ata_id_xfermask(const u16 *id) |
cb95d562 | 1514 | { |
7dc951ae | 1515 | unsigned long pio_mask, mwdma_mask, udma_mask; |
cb95d562 TH |
1516 | |
1517 | /* Usual case. Word 53 indicates word 64 is valid */ | |
1518 | if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { | |
1519 | pio_mask = id[ATA_ID_PIO_MODES] & 0x03; | |
1520 | pio_mask <<= 3; | |
1521 | pio_mask |= 0x7; | |
1522 | } else { | |
1523 | /* If word 64 isn't valid then Word 51 high byte holds | |
1524 | * the PIO timing number for the maximum. Turn it into | |
1525 | * a mask. | |
1526 | */ | |
7a0f1c8a | 1527 | u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
46767aeb | 1528 | if (mode < 5) /* Valid PIO range */ |
2dcb407e | 1529 | pio_mask = (2 << mode) - 1; |
46767aeb AC |
1530 | else |
1531 | pio_mask = 1; | |
cb95d562 TH |
1532 | |
1533 | /* But wait.. there's more. Design your standards by | |
1534 | * committee and you too can get a free iordy field to | |
1535 | * process. However its the speeds not the modes that | |
1536 | * are supported... Note drivers using the timing API | |
1537 | * will get this right anyway | |
1538 | */ | |
1539 | } | |
1540 | ||
1541 | mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; | |
fb21f0d0 | 1542 | |
b352e57d AC |
1543 | if (ata_id_is_cfa(id)) { |
1544 | /* | |
1545 | * Process compact flash extended modes | |
1546 | */ | |
1547 | int pio = id[163] & 0x7; | |
1548 | int dma = (id[163] >> 3) & 7; | |
1549 | ||
1550 | if (pio) | |
1551 | pio_mask |= (1 << 5); | |
1552 | if (pio > 1) | |
1553 | pio_mask |= (1 << 6); | |
1554 | if (dma) | |
1555 | mwdma_mask |= (1 << 3); | |
1556 | if (dma > 1) | |
1557 | mwdma_mask |= (1 << 4); | |
1558 | } | |
1559 | ||
fb21f0d0 TH |
1560 | udma_mask = 0; |
1561 | if (id[ATA_ID_FIELD_VALID] & (1 << 2)) | |
1562 | udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; | |
cb95d562 TH |
1563 | |
1564 | return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
1565 | } | |
1566 | ||
86e45b6b | 1567 | /** |
442eacc3 | 1568 | * ata_pio_queue_task - Queue port_task |
86e45b6b | 1569 | * @ap: The ata_port to queue port_task for |
e2a7f77a | 1570 | * @fn: workqueue function to be scheduled |
65f27f38 | 1571 | * @data: data for @fn to use |
e2a7f77a | 1572 | * @delay: delay time for workqueue function |
86e45b6b TH |
1573 | * |
1574 | * Schedule @fn(@data) for execution after @delay jiffies using | |
1575 | * port_task. There is one port_task per port and it's the | |
1576 | * user(low level driver)'s responsibility to make sure that only | |
1577 | * one task is active at any given time. | |
1578 | * | |
1579 | * libata core layer takes care of synchronization between | |
442eacc3 | 1580 | * port_task and EH. ata_pio_queue_task() may be ignored for EH |
86e45b6b TH |
1581 | * synchronization. |
1582 | * | |
1583 | * LOCKING: | |
1584 | * Inherited from caller. | |
1585 | */ | |
624d5c51 | 1586 | void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay) |
86e45b6b | 1587 | { |
65f27f38 | 1588 | ap->port_task_data = data; |
86e45b6b | 1589 | |
45a66c1c ON |
1590 | /* may fail if ata_port_flush_task() in progress */ |
1591 | queue_delayed_work(ata_wq, &ap->port_task, delay); | |
86e45b6b TH |
1592 | } |
1593 | ||
1594 | /** | |
1595 | * ata_port_flush_task - Flush port_task | |
1596 | * @ap: The ata_port to flush port_task for | |
1597 | * | |
1598 | * After this function completes, port_task is guranteed not to | |
1599 | * be running or scheduled. | |
1600 | * | |
1601 | * LOCKING: | |
1602 | * Kernel thread context (may sleep) | |
1603 | */ | |
1604 | void ata_port_flush_task(struct ata_port *ap) | |
1605 | { | |
86e45b6b TH |
1606 | DPRINTK("ENTER\n"); |
1607 | ||
45a66c1c | 1608 | cancel_rearming_delayed_work(&ap->port_task); |
86e45b6b | 1609 | |
0dd4b21f | 1610 | if (ata_msg_ctl(ap)) |
7f5e4e8d | 1611 | ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__); |
86e45b6b TH |
1612 | } |
1613 | ||
7102d230 | 1614 | static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
a2a7a662 | 1615 | { |
77853bf2 | 1616 | struct completion *waiting = qc->private_data; |
a2a7a662 | 1617 | |
a2a7a662 | 1618 | complete(waiting); |
a2a7a662 TH |
1619 | } |
1620 | ||
1621 | /** | |
2432697b | 1622 | * ata_exec_internal_sg - execute libata internal command |
a2a7a662 TH |
1623 | * @dev: Device to which the command is sent |
1624 | * @tf: Taskfile registers for the command and the result | |
d69cf37d | 1625 | * @cdb: CDB for packet command |
a2a7a662 | 1626 | * @dma_dir: Data tranfer direction of the command |
5c1ad8b3 | 1627 | * @sgl: sg list for the data buffer of the command |
2432697b | 1628 | * @n_elem: Number of sg entries |
2b789108 | 1629 | * @timeout: Timeout in msecs (0 for default) |
a2a7a662 TH |
1630 | * |
1631 | * Executes libata internal command with timeout. @tf contains | |
1632 | * command on entry and result on return. Timeout and error | |
1633 | * conditions are reported via return value. No recovery action | |
1634 | * is taken after a command times out. It's caller's duty to | |
1635 | * clean up after timeout. | |
1636 | * | |
1637 | * LOCKING: | |
1638 | * None. Should be called with kernel context, might sleep. | |
551e8889 TH |
1639 | * |
1640 | * RETURNS: | |
1641 | * Zero on success, AC_ERR_* mask on failure | |
a2a7a662 | 1642 | */ |
2432697b TH |
1643 | unsigned ata_exec_internal_sg(struct ata_device *dev, |
1644 | struct ata_taskfile *tf, const u8 *cdb, | |
87260216 | 1645 | int dma_dir, struct scatterlist *sgl, |
2b789108 | 1646 | unsigned int n_elem, unsigned long timeout) |
a2a7a662 | 1647 | { |
9af5c9c9 TH |
1648 | struct ata_link *link = dev->link; |
1649 | struct ata_port *ap = link->ap; | |
a2a7a662 TH |
1650 | u8 command = tf->command; |
1651 | struct ata_queued_cmd *qc; | |
2ab7db1f | 1652 | unsigned int tag, preempted_tag; |
dedaf2b0 | 1653 | u32 preempted_sactive, preempted_qc_active; |
da917d69 | 1654 | int preempted_nr_active_links; |
60be6b9a | 1655 | DECLARE_COMPLETION_ONSTACK(wait); |
a2a7a662 | 1656 | unsigned long flags; |
77853bf2 | 1657 | unsigned int err_mask; |
d95a717f | 1658 | int rc; |
a2a7a662 | 1659 | |
ba6a1308 | 1660 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 | 1661 | |
e3180499 | 1662 | /* no internal command while frozen */ |
b51e9e5d | 1663 | if (ap->pflags & ATA_PFLAG_FROZEN) { |
ba6a1308 | 1664 | spin_unlock_irqrestore(ap->lock, flags); |
e3180499 TH |
1665 | return AC_ERR_SYSTEM; |
1666 | } | |
1667 | ||
2ab7db1f | 1668 | /* initialize internal qc */ |
a2a7a662 | 1669 | |
2ab7db1f TH |
1670 | /* XXX: Tag 0 is used for drivers with legacy EH as some |
1671 | * drivers choke if any other tag is given. This breaks | |
1672 | * ata_tag_internal() test for those drivers. Don't use new | |
1673 | * EH stuff without converting to it. | |
1674 | */ | |
1675 | if (ap->ops->error_handler) | |
1676 | tag = ATA_TAG_INTERNAL; | |
1677 | else | |
1678 | tag = 0; | |
1679 | ||
6cec4a39 | 1680 | if (test_and_set_bit(tag, &ap->qc_allocated)) |
2ab7db1f | 1681 | BUG(); |
f69499f4 | 1682 | qc = __ata_qc_from_tag(ap, tag); |
2ab7db1f TH |
1683 | |
1684 | qc->tag = tag; | |
1685 | qc->scsicmd = NULL; | |
1686 | qc->ap = ap; | |
1687 | qc->dev = dev; | |
1688 | ata_qc_reinit(qc); | |
1689 | ||
9af5c9c9 TH |
1690 | preempted_tag = link->active_tag; |
1691 | preempted_sactive = link->sactive; | |
dedaf2b0 | 1692 | preempted_qc_active = ap->qc_active; |
da917d69 | 1693 | preempted_nr_active_links = ap->nr_active_links; |
9af5c9c9 TH |
1694 | link->active_tag = ATA_TAG_POISON; |
1695 | link->sactive = 0; | |
dedaf2b0 | 1696 | ap->qc_active = 0; |
da917d69 | 1697 | ap->nr_active_links = 0; |
2ab7db1f TH |
1698 | |
1699 | /* prepare & issue qc */ | |
a2a7a662 | 1700 | qc->tf = *tf; |
d69cf37d TH |
1701 | if (cdb) |
1702 | memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); | |
e61e0672 | 1703 | qc->flags |= ATA_QCFLAG_RESULT_TF; |
a2a7a662 TH |
1704 | qc->dma_dir = dma_dir; |
1705 | if (dma_dir != DMA_NONE) { | |
2432697b | 1706 | unsigned int i, buflen = 0; |
87260216 | 1707 | struct scatterlist *sg; |
2432697b | 1708 | |
87260216 JA |
1709 | for_each_sg(sgl, sg, n_elem, i) |
1710 | buflen += sg->length; | |
2432697b | 1711 | |
87260216 | 1712 | ata_sg_init(qc, sgl, n_elem); |
49c80429 | 1713 | qc->nbytes = buflen; |
a2a7a662 TH |
1714 | } |
1715 | ||
77853bf2 | 1716 | qc->private_data = &wait; |
a2a7a662 TH |
1717 | qc->complete_fn = ata_qc_complete_internal; |
1718 | ||
8e0e694a | 1719 | ata_qc_issue(qc); |
a2a7a662 | 1720 | |
ba6a1308 | 1721 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 | 1722 | |
2b789108 TH |
1723 | if (!timeout) |
1724 | timeout = ata_probe_timeout * 1000 / HZ; | |
1725 | ||
1726 | rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); | |
d95a717f TH |
1727 | |
1728 | ata_port_flush_task(ap); | |
41ade50c | 1729 | |
d95a717f | 1730 | if (!rc) { |
ba6a1308 | 1731 | spin_lock_irqsave(ap->lock, flags); |
a2a7a662 TH |
1732 | |
1733 | /* We're racing with irq here. If we lose, the | |
1734 | * following test prevents us from completing the qc | |
d95a717f TH |
1735 | * twice. If we win, the port is frozen and will be |
1736 | * cleaned up by ->post_internal_cmd(). | |
a2a7a662 | 1737 | */ |
77853bf2 | 1738 | if (qc->flags & ATA_QCFLAG_ACTIVE) { |
d95a717f TH |
1739 | qc->err_mask |= AC_ERR_TIMEOUT; |
1740 | ||
1741 | if (ap->ops->error_handler) | |
1742 | ata_port_freeze(ap); | |
1743 | else | |
1744 | ata_qc_complete(qc); | |
f15a1daf | 1745 | |
0dd4b21f BP |
1746 | if (ata_msg_warn(ap)) |
1747 | ata_dev_printk(dev, KERN_WARNING, | |
88574551 | 1748 | "qc timeout (cmd 0x%x)\n", command); |
a2a7a662 TH |
1749 | } |
1750 | ||
ba6a1308 | 1751 | spin_unlock_irqrestore(ap->lock, flags); |
a2a7a662 TH |
1752 | } |
1753 | ||
d95a717f TH |
1754 | /* do post_internal_cmd */ |
1755 | if (ap->ops->post_internal_cmd) | |
1756 | ap->ops->post_internal_cmd(qc); | |
1757 | ||
a51d644a TH |
1758 | /* perform minimal error analysis */ |
1759 | if (qc->flags & ATA_QCFLAG_FAILED) { | |
1760 | if (qc->result_tf.command & (ATA_ERR | ATA_DF)) | |
1761 | qc->err_mask |= AC_ERR_DEV; | |
1762 | ||
1763 | if (!qc->err_mask) | |
1764 | qc->err_mask |= AC_ERR_OTHER; | |
1765 | ||
1766 | if (qc->err_mask & ~AC_ERR_OTHER) | |
1767 | qc->err_mask &= ~AC_ERR_OTHER; | |
d95a717f TH |
1768 | } |
1769 | ||
15869303 | 1770 | /* finish up */ |
ba6a1308 | 1771 | spin_lock_irqsave(ap->lock, flags); |
15869303 | 1772 | |
e61e0672 | 1773 | *tf = qc->result_tf; |
77853bf2 TH |
1774 | err_mask = qc->err_mask; |
1775 | ||
1776 | ata_qc_free(qc); | |
9af5c9c9 TH |
1777 | link->active_tag = preempted_tag; |
1778 | link->sactive = preempted_sactive; | |
dedaf2b0 | 1779 | ap->qc_active = preempted_qc_active; |
da917d69 | 1780 | ap->nr_active_links = preempted_nr_active_links; |
77853bf2 | 1781 | |
1f7dd3e9 TH |
1782 | /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
1783 | * Until those drivers are fixed, we detect the condition | |
1784 | * here, fail the command with AC_ERR_SYSTEM and reenable the | |
1785 | * port. | |
1786 | * | |
1787 | * Note that this doesn't change any behavior as internal | |
1788 | * command failure results in disabling the device in the | |
1789 | * higher layer for LLDDs without new reset/EH callbacks. | |
1790 | * | |
1791 | * Kill the following code as soon as those drivers are fixed. | |
1792 | */ | |
198e0fed | 1793 | if (ap->flags & ATA_FLAG_DISABLED) { |
1f7dd3e9 TH |
1794 | err_mask |= AC_ERR_SYSTEM; |
1795 | ata_port_probe(ap); | |
1796 | } | |
1797 | ||
ba6a1308 | 1798 | spin_unlock_irqrestore(ap->lock, flags); |
15869303 | 1799 | |
77853bf2 | 1800 | return err_mask; |
a2a7a662 TH |
1801 | } |
1802 | ||
2432697b | 1803 | /** |
33480a0e | 1804 | * ata_exec_internal - execute libata internal command |
2432697b TH |
1805 | * @dev: Device to which the command is sent |
1806 | * @tf: Taskfile registers for the command and the result | |
1807 | * @cdb: CDB for packet command | |
1808 | * @dma_dir: Data tranfer direction of the command | |
1809 | * @buf: Data buffer of the command | |
1810 | * @buflen: Length of data buffer | |
2b789108 | 1811 | * @timeout: Timeout in msecs (0 for default) |
2432697b TH |
1812 | * |
1813 | * Wrapper around ata_exec_internal_sg() which takes simple | |
1814 | * buffer instead of sg list. | |
1815 | * | |
1816 | * LOCKING: | |
1817 | * None. Should be called with kernel context, might sleep. | |
1818 | * | |
1819 | * RETURNS: | |
1820 | * Zero on success, AC_ERR_* mask on failure | |
1821 | */ | |
1822 | unsigned ata_exec_internal(struct ata_device *dev, | |
1823 | struct ata_taskfile *tf, const u8 *cdb, | |
2b789108 TH |
1824 | int dma_dir, void *buf, unsigned int buflen, |
1825 | unsigned long timeout) | |
2432697b | 1826 | { |
33480a0e TH |
1827 | struct scatterlist *psg = NULL, sg; |
1828 | unsigned int n_elem = 0; | |
2432697b | 1829 | |
33480a0e TH |
1830 | if (dma_dir != DMA_NONE) { |
1831 | WARN_ON(!buf); | |
1832 | sg_init_one(&sg, buf, buflen); | |
1833 | psg = &sg; | |
1834 | n_elem++; | |
1835 | } | |
2432697b | 1836 | |
2b789108 TH |
1837 | return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
1838 | timeout); | |
2432697b TH |
1839 | } |
1840 | ||
977e6b9f TH |
1841 | /** |
1842 | * ata_do_simple_cmd - execute simple internal command | |
1843 | * @dev: Device to which the command is sent | |
1844 | * @cmd: Opcode to execute | |
1845 | * | |
1846 | * Execute a 'simple' command, that only consists of the opcode | |
1847 | * 'cmd' itself, without filling any other registers | |
1848 | * | |
1849 | * LOCKING: | |
1850 | * Kernel thread context (may sleep). | |
1851 | * | |
1852 | * RETURNS: | |
1853 | * Zero on success, AC_ERR_* mask on failure | |
e58eb583 | 1854 | */ |
77b08fb5 | 1855 | unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
e58eb583 TH |
1856 | { |
1857 | struct ata_taskfile tf; | |
e58eb583 TH |
1858 | |
1859 | ata_tf_init(dev, &tf); | |
1860 | ||
1861 | tf.command = cmd; | |
1862 | tf.flags |= ATA_TFLAG_DEVICE; | |
1863 | tf.protocol = ATA_PROT_NODATA; | |
1864 | ||
2b789108 | 1865 | return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
e58eb583 TH |
1866 | } |
1867 | ||
1bc4ccff AC |
1868 | /** |
1869 | * ata_pio_need_iordy - check if iordy needed | |
1870 | * @adev: ATA device | |
1871 | * | |
1872 | * Check if the current speed of the device requires IORDY. Used | |
1873 | * by various controllers for chip configuration. | |
1874 | */ | |
a617c09f | 1875 | |
1bc4ccff AC |
1876 | unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
1877 | { | |
432729f0 AC |
1878 | /* Controller doesn't support IORDY. Probably a pointless check |
1879 | as the caller should know this */ | |
9af5c9c9 | 1880 | if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
1bc4ccff | 1881 | return 0; |
432729f0 AC |
1882 | /* PIO3 and higher it is mandatory */ |
1883 | if (adev->pio_mode > XFER_PIO_2) | |
1884 | return 1; | |
1885 | /* We turn it on when possible */ | |
1886 | if (ata_id_has_iordy(adev->id)) | |
1bc4ccff | 1887 | return 1; |
432729f0 AC |
1888 | return 0; |
1889 | } | |
2e9edbf8 | 1890 | |
432729f0 AC |
1891 | /** |
1892 | * ata_pio_mask_no_iordy - Return the non IORDY mask | |
1893 | * @adev: ATA device | |
1894 | * | |
1895 | * Compute the highest mode possible if we are not using iordy. Return | |
1896 | * -1 if no iordy mode is available. | |
1897 | */ | |
a617c09f | 1898 | |
432729f0 AC |
1899 | static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
1900 | { | |
1bc4ccff | 1901 | /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
1bc4ccff | 1902 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
432729f0 | 1903 | u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
1bc4ccff AC |
1904 | /* Is the speed faster than the drive allows non IORDY ? */ |
1905 | if (pio) { | |
1906 | /* This is cycle times not frequency - watch the logic! */ | |
1907 | if (pio > 240) /* PIO2 is 240nS per cycle */ | |
432729f0 AC |
1908 | return 3 << ATA_SHIFT_PIO; |
1909 | return 7 << ATA_SHIFT_PIO; | |
1bc4ccff AC |
1910 | } |
1911 | } | |
432729f0 | 1912 | return 3 << ATA_SHIFT_PIO; |
1bc4ccff AC |
1913 | } |
1914 | ||
1da177e4 | 1915 | /** |
49016aca | 1916 | * ata_dev_read_id - Read ID data from the specified device |
49016aca TH |
1917 | * @dev: target device |
1918 | * @p_class: pointer to class of the target device (may be changed) | |
bff04647 | 1919 | * @flags: ATA_READID_* flags |
fe635c7e | 1920 | * @id: buffer to read IDENTIFY data into |
1da177e4 | 1921 | * |
49016aca TH |
1922 | * Read ID data from the specified device. ATA_CMD_ID_ATA is |
1923 | * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI | |
aec5c3c1 TH |
1924 | * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
1925 | * for pre-ATA4 drives. | |
1da177e4 | 1926 | * |
50a99018 | 1927 | * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
2dcb407e | 1928 | * now we abort if we hit that case. |
50a99018 | 1929 | * |
1da177e4 | 1930 | * LOCKING: |
49016aca TH |
1931 | * Kernel thread context (may sleep) |
1932 | * | |
1933 | * RETURNS: | |
1934 | * 0 on success, -errno otherwise. | |
1da177e4 | 1935 | */ |
a9beec95 | 1936 | int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
bff04647 | 1937 | unsigned int flags, u16 *id) |
1da177e4 | 1938 | { |
9af5c9c9 | 1939 | struct ata_port *ap = dev->link->ap; |
49016aca | 1940 | unsigned int class = *p_class; |
a0123703 | 1941 | struct ata_taskfile tf; |
49016aca TH |
1942 | unsigned int err_mask = 0; |
1943 | const char *reason; | |
54936f8b | 1944 | int may_fallback = 1, tried_spinup = 0; |
49016aca | 1945 | int rc; |
1da177e4 | 1946 | |
0dd4b21f | 1947 | if (ata_msg_ctl(ap)) |
7f5e4e8d | 1948 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 1949 | |
49016aca | 1950 | retry: |
3373efd8 | 1951 | ata_tf_init(dev, &tf); |
a0123703 | 1952 | |
49016aca TH |
1953 | switch (class) { |
1954 | case ATA_DEV_ATA: | |
a0123703 | 1955 | tf.command = ATA_CMD_ID_ATA; |
49016aca TH |
1956 | break; |
1957 | case ATA_DEV_ATAPI: | |
a0123703 | 1958 | tf.command = ATA_CMD_ID_ATAPI; |
49016aca TH |
1959 | break; |
1960 | default: | |
1961 | rc = -ENODEV; | |
1962 | reason = "unsupported class"; | |
1963 | goto err_out; | |
1da177e4 LT |
1964 | } |
1965 | ||
a0123703 | 1966 | tf.protocol = ATA_PROT_PIO; |
81afe893 TH |
1967 | |
1968 | /* Some devices choke if TF registers contain garbage. Make | |
1969 | * sure those are properly initialized. | |
1970 | */ | |
1971 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
1972 | ||
1973 | /* Device presence detection is unreliable on some | |
1974 | * controllers. Always poll IDENTIFY if available. | |
1975 | */ | |
1976 | tf.flags |= ATA_TFLAG_POLLING; | |
1da177e4 | 1977 | |
3373efd8 | 1978 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
2b789108 | 1979 | id, sizeof(id[0]) * ATA_ID_WORDS, 0); |
a0123703 | 1980 | if (err_mask) { |
800b3996 | 1981 | if (err_mask & AC_ERR_NODEV_HINT) { |
1ffc151f TH |
1982 | ata_dev_printk(dev, KERN_DEBUG, |
1983 | "NODEV after polling detection\n"); | |
55a8e2c8 TH |
1984 | return -ENOENT; |
1985 | } | |
1986 | ||
1ffc151f TH |
1987 | if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
1988 | /* Device or controller might have reported | |
1989 | * the wrong device class. Give a shot at the | |
1990 | * other IDENTIFY if the current one is | |
1991 | * aborted by the device. | |
1992 | */ | |
1993 | if (may_fallback) { | |
1994 | may_fallback = 0; | |
1995 | ||
1996 | if (class == ATA_DEV_ATA) | |
1997 | class = ATA_DEV_ATAPI; | |
1998 | else | |
1999 | class = ATA_DEV_ATA; | |
2000 | goto retry; | |
2001 | } | |
2002 | ||
2003 | /* Control reaches here iff the device aborted | |
2004 | * both flavors of IDENTIFYs which happens | |
2005 | * sometimes with phantom devices. | |
2006 | */ | |
2007 | ata_dev_printk(dev, KERN_DEBUG, | |
2008 | "both IDENTIFYs aborted, assuming NODEV\n"); | |
2009 | return -ENOENT; | |
54936f8b TH |
2010 | } |
2011 | ||
49016aca TH |
2012 | rc = -EIO; |
2013 | reason = "I/O error"; | |
1da177e4 LT |
2014 | goto err_out; |
2015 | } | |
2016 | ||
54936f8b TH |
2017 | /* Falling back doesn't make sense if ID data was read |
2018 | * successfully at least once. | |
2019 | */ | |
2020 | may_fallback = 0; | |
2021 | ||
49016aca | 2022 | swap_buf_le16(id, ATA_ID_WORDS); |
1da177e4 | 2023 | |
49016aca | 2024 | /* sanity check */ |
a4f5749b | 2025 | rc = -EINVAL; |
6070068b | 2026 | reason = "device reports invalid type"; |
a4f5749b TH |
2027 | |
2028 | if (class == ATA_DEV_ATA) { | |
2029 | if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) | |
2030 | goto err_out; | |
2031 | } else { | |
2032 | if (ata_id_is_ata(id)) | |
2033 | goto err_out; | |
49016aca TH |
2034 | } |
2035 | ||
169439c2 ML |
2036 | if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
2037 | tried_spinup = 1; | |
2038 | /* | |
2039 | * Drive powered-up in standby mode, and requires a specific | |
2040 | * SET_FEATURES spin-up subcommand before it will accept | |
2041 | * anything other than the original IDENTIFY command. | |
2042 | */ | |
218f3d30 | 2043 | err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
fb0582f9 | 2044 | if (err_mask && id[2] != 0x738c) { |
169439c2 ML |
2045 | rc = -EIO; |
2046 | reason = "SPINUP failed"; | |
2047 | goto err_out; | |
2048 | } | |
2049 | /* | |
2050 | * If the drive initially returned incomplete IDENTIFY info, | |
2051 | * we now must reissue the IDENTIFY command. | |
2052 | */ | |
2053 | if (id[2] == 0x37c8) | |
2054 | goto retry; | |
2055 | } | |
2056 | ||
bff04647 | 2057 | if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
49016aca TH |
2058 | /* |
2059 | * The exact sequence expected by certain pre-ATA4 drives is: | |
2060 | * SRST RESET | |
50a99018 AC |
2061 | * IDENTIFY (optional in early ATA) |
2062 | * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) | |
49016aca TH |
2063 | * anything else.. |
2064 | * Some drives were very specific about that exact sequence. | |
50a99018 AC |
2065 | * |
2066 | * Note that ATA4 says lba is mandatory so the second check | |
2067 | * shoud never trigger. | |
49016aca TH |
2068 | */ |
2069 | if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { | |
3373efd8 | 2070 | err_mask = ata_dev_init_params(dev, id[3], id[6]); |
49016aca TH |
2071 | if (err_mask) { |
2072 | rc = -EIO; | |
2073 | reason = "INIT_DEV_PARAMS failed"; | |
2074 | goto err_out; | |
2075 | } | |
2076 | ||
2077 | /* current CHS translation info (id[53-58]) might be | |
2078 | * changed. reread the identify device info. | |
2079 | */ | |
bff04647 | 2080 | flags &= ~ATA_READID_POSTRESET; |
49016aca TH |
2081 | goto retry; |
2082 | } | |
2083 | } | |
2084 | ||
2085 | *p_class = class; | |
fe635c7e | 2086 | |
49016aca TH |
2087 | return 0; |
2088 | ||
2089 | err_out: | |
88574551 | 2090 | if (ata_msg_warn(ap)) |
0dd4b21f | 2091 | ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
88574551 | 2092 | "(%s, err_mask=0x%x)\n", reason, err_mask); |
49016aca TH |
2093 | return rc; |
2094 | } | |
2095 | ||
3373efd8 | 2096 | static inline u8 ata_dev_knobble(struct ata_device *dev) |
4b2f3ede | 2097 | { |
9af5c9c9 TH |
2098 | struct ata_port *ap = dev->link->ap; |
2099 | return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); | |
4b2f3ede TH |
2100 | } |
2101 | ||
a6e6ce8e TH |
2102 | static void ata_dev_config_ncq(struct ata_device *dev, |
2103 | char *desc, size_t desc_sz) | |
2104 | { | |
9af5c9c9 | 2105 | struct ata_port *ap = dev->link->ap; |
a6e6ce8e TH |
2106 | int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
2107 | ||
2108 | if (!ata_id_has_ncq(dev->id)) { | |
2109 | desc[0] = '\0'; | |
2110 | return; | |
2111 | } | |
75683fe7 | 2112 | if (dev->horkage & ATA_HORKAGE_NONCQ) { |
6919a0a6 AC |
2113 | snprintf(desc, desc_sz, "NCQ (not used)"); |
2114 | return; | |
2115 | } | |
a6e6ce8e | 2116 | if (ap->flags & ATA_FLAG_NCQ) { |
cca3974e | 2117 | hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
a6e6ce8e TH |
2118 | dev->flags |= ATA_DFLAG_NCQ; |
2119 | } | |
2120 | ||
2121 | if (hdepth >= ddepth) | |
2122 | snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); | |
2123 | else | |
2124 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); | |
2125 | } | |
2126 | ||
49016aca | 2127 | /** |
ffeae418 | 2128 | * ata_dev_configure - Configure the specified ATA/ATAPI device |
ffeae418 TH |
2129 | * @dev: Target device to configure |
2130 | * | |
2131 | * Configure @dev according to @dev->id. Generic and low-level | |
2132 | * driver specific fixups are also applied. | |
49016aca TH |
2133 | * |
2134 | * LOCKING: | |
ffeae418 TH |
2135 | * Kernel thread context (may sleep) |
2136 | * | |
2137 | * RETURNS: | |
2138 | * 0 on success, -errno otherwise | |
49016aca | 2139 | */ |
efdaedc4 | 2140 | int ata_dev_configure(struct ata_device *dev) |
49016aca | 2141 | { |
9af5c9c9 TH |
2142 | struct ata_port *ap = dev->link->ap; |
2143 | struct ata_eh_context *ehc = &dev->link->eh_context; | |
6746544c | 2144 | int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
1148c3a7 | 2145 | const u16 *id = dev->id; |
7dc951ae | 2146 | unsigned long xfer_mask; |
b352e57d | 2147 | char revbuf[7]; /* XYZ-99\0 */ |
3f64f565 EM |
2148 | char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
2149 | char modelbuf[ATA_ID_PROD_LEN+1]; | |
e6d902a3 | 2150 | int rc; |
49016aca | 2151 | |
0dd4b21f | 2152 | if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
44877b4e | 2153 | ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
7f5e4e8d | 2154 | __func__); |
ffeae418 | 2155 | return 0; |
49016aca TH |
2156 | } |
2157 | ||
0dd4b21f | 2158 | if (ata_msg_probe(ap)) |
7f5e4e8d | 2159 | ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
1da177e4 | 2160 | |
75683fe7 TH |
2161 | /* set horkage */ |
2162 | dev->horkage |= ata_dev_blacklisted(dev); | |
33267325 | 2163 | ata_force_horkage(dev); |
75683fe7 | 2164 | |
6746544c TH |
2165 | /* let ACPI work its magic */ |
2166 | rc = ata_acpi_on_devcfg(dev); | |
2167 | if (rc) | |
2168 | return rc; | |
08573a86 | 2169 | |
05027adc TH |
2170 | /* massage HPA, do it early as it might change IDENTIFY data */ |
2171 | rc = ata_hpa_resize(dev); | |
2172 | if (rc) | |
2173 | return rc; | |
2174 | ||
c39f5ebe | 2175 | /* print device capabilities */ |
0dd4b21f | 2176 | if (ata_msg_probe(ap)) |
88574551 TH |
2177 | ata_dev_printk(dev, KERN_DEBUG, |
2178 | "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " | |
2179 | "85:%04x 86:%04x 87:%04x 88:%04x\n", | |
7f5e4e8d | 2180 | __func__, |
f15a1daf TH |
2181 | id[49], id[82], id[83], id[84], |
2182 | id[85], id[86], id[87], id[88]); | |
c39f5ebe | 2183 | |
208a9933 | 2184 | /* initialize to-be-configured parameters */ |
ea1dd4e1 | 2185 | dev->flags &= ~ATA_DFLAG_CFG_MASK; |
208a9933 TH |
2186 | dev->max_sectors = 0; |
2187 | dev->cdb_len = 0; | |
2188 | dev->n_sectors = 0; | |
2189 | dev->cylinders = 0; | |
2190 | dev->heads = 0; | |
2191 | dev->sectors = 0; | |
2192 | ||
1da177e4 LT |
2193 | /* |
2194 | * common ATA, ATAPI feature tests | |
2195 | */ | |
2196 | ||
ff8854b2 | 2197 | /* find max transfer mode; for printk only */ |
1148c3a7 | 2198 | xfer_mask = ata_id_xfermask(id); |
1da177e4 | 2199 | |
0dd4b21f BP |
2200 | if (ata_msg_probe(ap)) |
2201 | ata_dump_id(id); | |
1da177e4 | 2202 | |
ef143d57 AL |
2203 | /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
2204 | ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, | |
2205 | sizeof(fwrevbuf)); | |
2206 | ||
2207 | ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, | |
2208 | sizeof(modelbuf)); | |
2209 | ||
1da177e4 LT |
2210 | /* ATA-specific feature tests */ |
2211 | if (dev->class == ATA_DEV_ATA) { | |
b352e57d AC |
2212 | if (ata_id_is_cfa(id)) { |
2213 | if (id[162] & 1) /* CPRM may make this media unusable */ | |
44877b4e TH |
2214 | ata_dev_printk(dev, KERN_WARNING, |
2215 | "supports DRM functions and may " | |
2216 | "not be fully accessable.\n"); | |
b352e57d | 2217 | snprintf(revbuf, 7, "CFA"); |
ae8d4ee7 | 2218 | } else { |
2dcb407e | 2219 | snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
ae8d4ee7 AC |
2220 | /* Warn the user if the device has TPM extensions */ |
2221 | if (ata_id_has_tpm(id)) | |
2222 | ata_dev_printk(dev, KERN_WARNING, | |
2223 | "supports DRM functions and may " | |
2224 | "not be fully accessable.\n"); | |
2225 | } | |
b352e57d | 2226 | |
1148c3a7 | 2227 | dev->n_sectors = ata_id_n_sectors(id); |
2940740b | 2228 | |
3f64f565 EM |
2229 | if (dev->id[59] & 0x100) |
2230 | dev->multi_count = dev->id[59] & 0xff; | |
2231 | ||
1148c3a7 | 2232 | if (ata_id_has_lba(id)) { |
4c2d721a | 2233 | const char *lba_desc; |
a6e6ce8e | 2234 | char ncq_desc[20]; |
8bf62ece | 2235 | |
4c2d721a TH |
2236 | lba_desc = "LBA"; |
2237 | dev->flags |= ATA_DFLAG_LBA; | |
1148c3a7 | 2238 | if (ata_id_has_lba48(id)) { |
8bf62ece | 2239 | dev->flags |= ATA_DFLAG_LBA48; |
4c2d721a | 2240 | lba_desc = "LBA48"; |
6fc49adb TH |
2241 | |
2242 | if (dev->n_sectors >= (1UL << 28) && | |
2243 | ata_id_has_flush_ext(id)) | |
2244 | dev->flags |= ATA_DFLAG_FLUSH_EXT; | |
4c2d721a | 2245 | } |
8bf62ece | 2246 | |
a6e6ce8e TH |
2247 | /* config NCQ */ |
2248 | ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); | |
2249 | ||
8bf62ece | 2250 | /* print device info to dmesg */ |
3f64f565 EM |
2251 | if (ata_msg_drv(ap) && print_info) { |
2252 | ata_dev_printk(dev, KERN_INFO, | |
2253 | "%s: %s, %s, max %s\n", | |
2254 | revbuf, modelbuf, fwrevbuf, | |
2255 | ata_mode_string(xfer_mask)); | |
2256 | ata_dev_printk(dev, KERN_INFO, | |
2257 | "%Lu sectors, multi %u: %s %s\n", | |
f15a1daf | 2258 | (unsigned long long)dev->n_sectors, |
3f64f565 EM |
2259 | dev->multi_count, lba_desc, ncq_desc); |
2260 | } | |
ffeae418 | 2261 | } else { |
8bf62ece AL |
2262 | /* CHS */ |
2263 | ||
2264 | /* Default translation */ | |
1148c3a7 TH |
2265 | dev->cylinders = id[1]; |
2266 | dev->heads = id[3]; | |
2267 | dev->sectors = id[6]; | |
8bf62ece | 2268 | |
1148c3a7 | 2269 | if (ata_id_current_chs_valid(id)) { |
8bf62ece | 2270 | /* Current CHS translation is valid. */ |
1148c3a7 TH |
2271 | dev->cylinders = id[54]; |
2272 | dev->heads = id[55]; | |
2273 | dev->sectors = id[56]; | |
8bf62ece AL |
2274 | } |
2275 | ||
2276 | /* print device info to dmesg */ | |
3f64f565 | 2277 | if (ata_msg_drv(ap) && print_info) { |
88574551 | 2278 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2279 | "%s: %s, %s, max %s\n", |
2280 | revbuf, modelbuf, fwrevbuf, | |
2281 | ata_mode_string(xfer_mask)); | |
a84471fe | 2282 | ata_dev_printk(dev, KERN_INFO, |
3f64f565 EM |
2283 | "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
2284 | (unsigned long long)dev->n_sectors, | |
2285 | dev->multi_count, dev->cylinders, | |
2286 | dev->heads, dev->sectors); | |
2287 | } | |
07f6f7d0 AL |
2288 | } |
2289 | ||
6e7846e9 | 2290 | dev->cdb_len = 16; |
1da177e4 LT |
2291 | } |
2292 | ||
2293 | /* ATAPI-specific feature tests */ | |
2c13b7ce | 2294 | else if (dev->class == ATA_DEV_ATAPI) { |
854c73a2 TH |
2295 | const char *cdb_intr_string = ""; |
2296 | const char *atapi_an_string = ""; | |
91163006 | 2297 | const char *dma_dir_string = ""; |
7d77b247 | 2298 | u32 sntf; |
08a556db | 2299 | |
1148c3a7 | 2300 | rc = atapi_cdb_len(id); |
1da177e4 | 2301 | if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
0dd4b21f | 2302 | if (ata_msg_warn(ap)) |
88574551 TH |
2303 | ata_dev_printk(dev, KERN_WARNING, |
2304 | "unsupported CDB len\n"); | |
ffeae418 | 2305 | rc = -EINVAL; |
1da177e4 LT |
2306 | goto err_out_nosup; |
2307 | } | |
6e7846e9 | 2308 | dev->cdb_len = (unsigned int) rc; |
1da177e4 | 2309 | |
7d77b247 TH |
2310 | /* Enable ATAPI AN if both the host and device have |
2311 | * the support. If PMP is attached, SNTF is required | |
2312 | * to enable ATAPI AN to discern between PHY status | |
2313 | * changed notifications and ATAPI ANs. | |
9f45cbd3 | 2314 | */ |
7d77b247 TH |
2315 | if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
2316 | (!ap->nr_pmp_links || | |
2317 | sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { | |
854c73a2 TH |
2318 | unsigned int err_mask; |
2319 | ||
9f45cbd3 | 2320 | /* issue SET feature command to turn this on */ |
218f3d30 JG |
2321 | err_mask = ata_dev_set_feature(dev, |
2322 | SETFEATURES_SATA_ENABLE, SATA_AN); | |
854c73a2 | 2323 | if (err_mask) |
9f45cbd3 | 2324 | ata_dev_printk(dev, KERN_ERR, |
854c73a2 TH |
2325 | "failed to enable ATAPI AN " |
2326 | "(err_mask=0x%x)\n", err_mask); | |
2327 | else { | |
9f45cbd3 | 2328 | dev->flags |= ATA_DFLAG_AN; |
854c73a2 TH |
2329 | atapi_an_string = ", ATAPI AN"; |
2330 | } | |
9f45cbd3 KCA |
2331 | } |
2332 | ||
08a556db | 2333 | if (ata_id_cdb_intr(dev->id)) { |
312f7da2 | 2334 | dev->flags |= ATA_DFLAG_CDB_INTR; |
08a556db AL |
2335 | cdb_intr_string = ", CDB intr"; |
2336 | } | |
312f7da2 | 2337 | |
91163006 TH |
2338 | if (atapi_dmadir || atapi_id_dmadir(dev->id)) { |
2339 | dev->flags |= ATA_DFLAG_DMADIR; | |
2340 | dma_dir_string = ", DMADIR"; | |
2341 | } | |
2342 | ||
1da177e4 | 2343 | /* print device info to dmesg */ |
5afc8142 | 2344 | if (ata_msg_drv(ap) && print_info) |
ef143d57 | 2345 | ata_dev_printk(dev, KERN_INFO, |
91163006 | 2346 | "ATAPI: %s, %s, max %s%s%s%s\n", |
ef143d57 | 2347 | modelbuf, fwrevbuf, |
12436c30 | 2348 | ata_mode_string(xfer_mask), |
91163006 TH |
2349 | cdb_intr_string, atapi_an_string, |
2350 | dma_dir_string); | |
1da177e4 LT |
2351 | } |
2352 | ||
914ed354 TH |
2353 | /* determine max_sectors */ |
2354 | dev->max_sectors = ATA_MAX_SECTORS; | |
2355 | if (dev->flags & ATA_DFLAG_LBA48) | |
2356 | dev->max_sectors = ATA_MAX_SECTORS_LBA48; | |
2357 | ||
ca77329f KCA |
2358 | if (!(dev->horkage & ATA_HORKAGE_IPM)) { |
2359 | if (ata_id_has_hipm(dev->id)) | |
2360 | dev->flags |= ATA_DFLAG_HIPM; | |
2361 | if (ata_id_has_dipm(dev->id)) | |
2362 | dev->flags |= ATA_DFLAG_DIPM; | |
2363 | } | |
2364 | ||
c5038fc0 AC |
2365 | /* Limit PATA drive on SATA cable bridge transfers to udma5, |
2366 | 200 sectors */ | |
3373efd8 | 2367 | if (ata_dev_knobble(dev)) { |
5afc8142 | 2368 | if (ata_msg_drv(ap) && print_info) |
f15a1daf TH |
2369 | ata_dev_printk(dev, KERN_INFO, |
2370 | "applying bridge limits\n"); | |
5a529139 | 2371 | dev->udma_mask &= ATA_UDMA5; |
4b2f3ede TH |
2372 | dev->max_sectors = ATA_MAX_SECTORS; |
2373 | } | |
2374 | ||
f8d8e579 | 2375 | if ((dev->class == ATA_DEV_ATAPI) && |
f442cd86 | 2376 | (atapi_command_packet_set(id) == TYPE_TAPE)) { |
f8d8e579 | 2377 | dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
f442cd86 AL |
2378 | dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
2379 | } | |
f8d8e579 | 2380 | |
75683fe7 | 2381 | if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
03ec52de TH |
2382 | dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
2383 | dev->max_sectors); | |
18d6e9d5 | 2384 | |
ca77329f KCA |
2385 | if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { |
2386 | dev->horkage |= ATA_HORKAGE_IPM; | |
2387 | ||
2388 | /* reset link pm_policy for this port to no pm */ | |
2389 | ap->pm_policy = MAX_PERFORMANCE; | |
2390 | } | |
2391 | ||
4b2f3ede | 2392 | if (ap->ops->dev_config) |
cd0d3bbc | 2393 | ap->ops->dev_config(dev); |
4b2f3ede | 2394 | |
c5038fc0 AC |
2395 | if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
2396 | /* Let the user know. We don't want to disallow opens for | |
2397 | rescue purposes, or in case the vendor is just a blithering | |
2398 | idiot. Do this after the dev_config call as some controllers | |
2399 | with buggy firmware may want to avoid reporting false device | |
2400 | bugs */ | |
2401 | ||
2402 | if (print_info) { | |
2403 | ata_dev_printk(dev, KERN_WARNING, | |
2404 | "Drive reports diagnostics failure. This may indicate a drive\n"); | |
2405 | ata_dev_printk(dev, KERN_WARNING, | |
2406 | "fault or invalid emulation. Contact drive vendor for information.\n"); | |
2407 | } | |
2408 | } | |
2409 | ||
ffeae418 | 2410 | return 0; |
1da177e4 LT |
2411 | |
2412 | err_out_nosup: | |
0dd4b21f | 2413 | if (ata_msg_probe(ap)) |
88574551 | 2414 | ata_dev_printk(dev, KERN_DEBUG, |
7f5e4e8d | 2415 | "%s: EXIT, err\n", __func__); |
ffeae418 | 2416 | return rc; |
1da177e4 LT |
2417 | } |
2418 | ||
be0d18df | 2419 | /** |
2e41e8e6 | 2420 | * ata_cable_40wire - return 40 wire cable type |
be0d18df AC |
2421 | * @ap: port |
2422 | * | |
2e41e8e6 | 2423 | * Helper method for drivers which want to hardwire 40 wire cable |
be0d18df AC |
2424 | * detection. |
2425 | */ | |
2426 | ||
2427 | int ata_cable_40wire(struct ata_port *ap) | |
2428 | { | |
2429 | return ATA_CBL_PATA40; | |
2430 | } | |
2431 | ||
2432 | /** | |
2e41e8e6 | 2433 | * ata_cable_80wire - return 80 wire cable type |
be0d18df AC |
2434 | * @ap: port |
2435 | * | |
2e41e8e6 | 2436 | * Helper method for drivers which want to hardwire 80 wire cable |
be0d18df AC |
2437 | * detection. |
2438 | */ | |
2439 | ||
2440 | int ata_cable_80wire(struct ata_port *ap) | |
2441 | { | |
2442 | return ATA_CBL_PATA80; | |
2443 | } | |
2444 | ||
2445 | /** | |
2446 | * ata_cable_unknown - return unknown PATA cable. | |
2447 | * @ap: port | |
2448 | * | |
2449 | * Helper method for drivers which have no PATA cable detection. | |
2450 | */ | |
2451 | ||
2452 | int ata_cable_unknown(struct ata_port *ap) | |
2453 | { | |
2454 | return ATA_CBL_PATA_UNK; | |
2455 | } | |
2456 | ||
c88f90c3 TH |
2457 | /** |
2458 | * ata_cable_ignore - return ignored PATA cable. | |
2459 | * @ap: port | |
2460 | * | |
2461 | * Helper method for drivers which don't use cable type to limit | |
2462 | * transfer mode. | |
2463 | */ | |
2464 | int ata_cable_ignore(struct ata_port *ap) | |
2465 | { | |
2466 | return ATA_CBL_PATA_IGN; | |
2467 | } | |
2468 | ||
be0d18df AC |
2469 | /** |
2470 | * ata_cable_sata - return SATA cable type | |
2471 | * @ap: port | |
2472 | * | |
2473 | * Helper method for drivers which have SATA cables | |
2474 | */ | |
2475 | ||
2476 | int ata_cable_sata(struct ata_port *ap) | |
2477 | { | |
2478 | return ATA_CBL_SATA; | |
2479 | } | |
2480 | ||
1da177e4 LT |
2481 | /** |
2482 | * ata_bus_probe - Reset and probe ATA bus | |
2483 | * @ap: Bus to probe | |
2484 | * | |
0cba632b JG |
2485 | * Master ATA bus probing function. Initiates a hardware-dependent |
2486 | * bus reset, then attempts to identify any devices found on | |
2487 | * the bus. | |
2488 | * | |
1da177e4 | 2489 | * LOCKING: |
0cba632b | 2490 | * PCI/etc. bus probe sem. |
1da177e4 LT |
2491 | * |
2492 | * RETURNS: | |
96072e69 | 2493 | * Zero on success, negative errno otherwise. |
1da177e4 LT |
2494 | */ |
2495 | ||
80289167 | 2496 | int ata_bus_probe(struct ata_port *ap) |
1da177e4 | 2497 | { |
28ca5c57 | 2498 | unsigned int classes[ATA_MAX_DEVICES]; |
14d2bac1 | 2499 | int tries[ATA_MAX_DEVICES]; |
f58229f8 | 2500 | int rc; |
e82cbdb9 | 2501 | struct ata_device *dev; |
1da177e4 | 2502 | |
28ca5c57 | 2503 | ata_port_probe(ap); |
c19ba8af | 2504 | |
f58229f8 TH |
2505 | ata_link_for_each_dev(dev, &ap->link) |
2506 | tries[dev->devno] = ATA_PROBE_MAX_TRIES; | |
14d2bac1 TH |
2507 | |
2508 | retry: | |
cdeab114 TH |
2509 | ata_link_for_each_dev(dev, &ap->link) { |
2510 | /* If we issue an SRST then an ATA drive (not ATAPI) | |
2511 | * may change configuration and be in PIO0 timing. If | |
2512 | * we do a hard reset (or are coming from power on) | |
2513 | * this is true for ATA or ATAPI. Until we've set a | |
2514 | * suitable controller mode we should not touch the | |
2515 | * bus as we may be talking too fast. | |
2516 | */ | |
2517 | dev->pio_mode = XFER_PIO_0; | |
2518 | ||
2519 | /* If the controller has a pio mode setup function | |
2520 | * then use it to set the chipset to rights. Don't | |
2521 | * touch the DMA setup as that will be dealt with when | |
2522 | * configuring devices. | |
2523 | */ | |
2524 | if (ap->ops->set_piomode) | |
2525 | ap->ops->set_piomode(ap, dev); | |
2526 | } | |
2527 | ||
2044470c | 2528 | /* reset and determine device classes */ |
52783c5d | 2529 | ap->ops->phy_reset(ap); |
2061a47a | 2530 | |
f58229f8 | 2531 | ata_link_for_each_dev(dev, &ap->link) { |
52783c5d TH |
2532 | if (!(ap->flags & ATA_FLAG_DISABLED) && |
2533 | dev->class != ATA_DEV_UNKNOWN) | |
2534 | classes[dev->devno] = dev->class; | |
2535 | else | |
2536 | classes[dev->devno] = ATA_DEV_NONE; | |
2044470c | 2537 | |
52783c5d | 2538 | dev->class = ATA_DEV_UNKNOWN; |
28ca5c57 | 2539 | } |
1da177e4 | 2540 | |
52783c5d | 2541 | ata_port_probe(ap); |
2044470c | 2542 | |
f31f0cc2 JG |
2543 | /* read IDENTIFY page and configure devices. We have to do the identify |
2544 | specific sequence bass-ackwards so that PDIAG- is released by | |
2545 | the slave device */ | |
2546 | ||
a4ba7fe2 | 2547 | ata_link_for_each_dev_reverse(dev, &ap->link) { |
f58229f8 TH |
2548 | if (tries[dev->devno]) |
2549 | dev->class = classes[dev->devno]; | |
ffeae418 | 2550 | |
14d2bac1 | 2551 | if (!ata_dev_enabled(dev)) |
ffeae418 | 2552 | continue; |
ffeae418 | 2553 | |
bff04647 TH |
2554 | rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
2555 | dev->id); | |
14d2bac1 TH |
2556 | if (rc) |
2557 | goto fail; | |
f31f0cc2 JG |
2558 | } |
2559 | ||
be0d18df AC |
2560 | /* Now ask for the cable type as PDIAG- should have been released */ |
2561 | if (ap->ops->cable_detect) | |
2562 | ap->cbl = ap->ops->cable_detect(ap); | |
2563 | ||
614fe29b AC |
2564 | /* We may have SATA bridge glue hiding here irrespective of the |
2565 | reported cable types and sensed types */ | |
2566 | ata_link_for_each_dev(dev, &ap->link) { | |
2567 | if (!ata_dev_enabled(dev)) | |
2568 | continue; | |
2569 | /* SATA drives indicate we have a bridge. We don't know which | |
2570 | end of the link the bridge is which is a problem */ | |
2571 | if (ata_id_is_sata(dev->id)) | |
2572 | ap->cbl = ATA_CBL_SATA; | |
2573 | } | |
2574 | ||
f31f0cc2 JG |
2575 | /* After the identify sequence we can now set up the devices. We do |
2576 | this in the normal order so that the user doesn't get confused */ | |
2577 | ||
f58229f8 | 2578 | ata_link_for_each_dev(dev, &ap->link) { |
f31f0cc2 JG |
2579 | if (!ata_dev_enabled(dev)) |
2580 | continue; | |
14d2bac1 | 2581 | |
9af5c9c9 | 2582 | ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
efdaedc4 | 2583 | rc = ata_dev_configure(dev); |
9af5c9c9 | 2584 | ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
14d2bac1 TH |
2585 | if (rc) |
2586 | goto fail; | |
1da177e4 LT |
2587 | } |
2588 | ||
e82cbdb9 | 2589 | /* configure transfer mode */ |
0260731f | 2590 | rc = ata_set_mode(&ap->link, &dev); |
4ae72a1e | 2591 | if (rc) |
51713d35 | 2592 | goto fail; |
1da177e4 | 2593 | |
f58229f8 TH |
2594 | ata_link_for_each_dev(dev, &ap->link) |
2595 | if (ata_dev_enabled(dev)) | |
e82cbdb9 | 2596 | return 0; |
1da177e4 | 2597 | |
e82cbdb9 TH |
2598 | /* no device present, disable port */ |
2599 | ata_port_disable(ap); | |
96072e69 | 2600 | return -ENODEV; |
14d2bac1 TH |
2601 | |
2602 | fail: | |
4ae72a1e TH |
2603 | tries[dev->devno]--; |
2604 | ||
14d2bac1 TH |
2605 | switch (rc) { |
2606 | case -EINVAL: | |
4ae72a1e | 2607 | /* eeek, something went very wrong, give up */ |
14d2bac1 TH |
2608 | tries[dev->devno] = 0; |
2609 | break; | |
4ae72a1e TH |
2610 | |
2611 | case -ENODEV: | |
2612 | /* give it just one more chance */ | |
2613 | tries[dev->devno] = min(tries[dev->devno], 1); | |
14d2bac1 | 2614 | case -EIO: |
4ae72a1e TH |
2615 | if (tries[dev->devno] == 1) { |
2616 | /* This is the last chance, better to slow | |
2617 | * down than lose it. | |
2618 | */ | |
936fd732 | 2619 | sata_down_spd_limit(&ap->link); |
4ae72a1e TH |
2620 | ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
2621 | } | |
14d2bac1 TH |
2622 | } |
2623 | ||
4ae72a1e | 2624 | if (!tries[dev->devno]) |
3373efd8 | 2625 | ata_dev_disable(dev); |
ec573755 | 2626 | |
14d2bac1 | 2627 | goto retry; |
1da177e4 LT |
2628 | } |
2629 | ||
2630 | /** | |
0cba632b JG |
2631 | * ata_port_probe - Mark port as enabled |
2632 | * @ap: Port for which we indicate enablement | |
1da177e4 | 2633 | * |
0cba632b JG |
2634 | * Modify @ap data structure such that the system |
2635 | * thinks that the entire port is enabled. | |
2636 | * | |
cca3974e | 2637 | * LOCKING: host lock, or some other form of |
0cba632b | 2638 | * serialization. |
1da177e4 LT |
2639 | */ |
2640 | ||
2641 | void ata_port_probe(struct ata_port *ap) | |
2642 | { | |
198e0fed | 2643 | ap->flags &= ~ATA_FLAG_DISABLED; |
1da177e4 LT |
2644 | } |
2645 | ||
3be680b7 TH |
2646 | /** |
2647 | * sata_print_link_status - Print SATA link status | |
936fd732 | 2648 | * @link: SATA link to printk link status about |
3be680b7 TH |
2649 | * |
2650 | * This function prints link speed and status of a SATA link. | |
2651 | * | |
2652 | * LOCKING: | |
2653 | * None. | |
2654 | */ | |
936fd732 | 2655 | void sata_print_link_status(struct ata_link *link) |
3be680b7 | 2656 | { |
6d5f9732 | 2657 | u32 sstatus, scontrol, tmp; |
3be680b7 | 2658 | |
936fd732 | 2659 | if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
3be680b7 | 2660 | return; |
936fd732 | 2661 | sata_scr_read(link, SCR_CONTROL, &scontrol); |
3be680b7 | 2662 | |
936fd732 | 2663 | if (ata_link_online(link)) { |
3be680b7 | 2664 | tmp = (sstatus >> 4) & 0xf; |
936fd732 | 2665 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2666 | "SATA link up %s (SStatus %X SControl %X)\n", |
2667 | sata_spd_string(tmp), sstatus, scontrol); | |
3be680b7 | 2668 | } else { |
936fd732 | 2669 | ata_link_printk(link, KERN_INFO, |
f15a1daf TH |
2670 | "SATA link down (SStatus %X SControl %X)\n", |
2671 | sstatus, scontrol); | |
3be680b7 TH |
2672 | } |
2673 | } | |
2674 | ||
ebdfca6e AC |
2675 | /** |
2676 | * ata_dev_pair - return other device on cable | |
ebdfca6e AC |
2677 | * @adev: device |
2678 | * | |
2679 | * Obtain the other device on the same cable, or if none is | |
2680 | * present NULL is returned | |
2681 | */ | |
2e9edbf8 | 2682 | |
3373efd8 | 2683 | struct ata_device *ata_dev_pair(struct ata_device *adev) |
ebdfca6e | 2684 | { |
9af5c9c9 TH |
2685 | struct ata_link *link = adev->link; |
2686 | struct ata_device *pair = &link->device[1 - adev->devno]; | |
e1211e3f | 2687 | if (!ata_dev_enabled(pair)) |
ebdfca6e AC |
2688 | return NULL; |
2689 | return pair; | |
2690 | } | |
2691 | ||
1da177e4 | 2692 | /** |
780a87f7 JG |
2693 | * ata_port_disable - Disable port. |
2694 | * @ap: Port to be disabled. | |
1da177e4 | 2695 | * |
780a87f7 JG |
2696 | * Modify @ap data structure such that the system |
2697 | * thinks that the entire port is disabled, and should | |
2698 | * never attempt to probe or communicate with devices | |
2699 | * on this port. | |
2700 | * | |
cca3974e | 2701 | * LOCKING: host lock, or some other form of |
780a87f7 | 2702 | * serialization. |
1da177e4 LT |
2703 | */ |
2704 | ||
2705 | void ata_port_disable(struct ata_port *ap) | |
2706 | { | |
9af5c9c9 TH |
2707 | ap->link.device[0].class = ATA_DEV_NONE; |
2708 | ap->link.device[1].class = ATA_DEV_NONE; | |
198e0fed | 2709 | ap->flags |= ATA_FLAG_DISABLED; |
1da177e4 LT |
2710 | } |
2711 | ||
1c3fae4d | 2712 | /** |
3c567b7d | 2713 | * sata_down_spd_limit - adjust SATA spd limit downward |
936fd732 | 2714 | * @link: Link to adjust SATA spd limit for |
1c3fae4d | 2715 | * |
936fd732 | 2716 | * Adjust SATA spd limit of @link downward. Note that this |
1c3fae4d | 2717 | * function only adjusts the limit. The change must be applied |
3c567b7d | 2718 | * using sata_set_spd(). |
1c3fae4d TH |
2719 | * |
2720 | * LOCKING: | |
2721 | * Inherited from caller. | |
2722 | * | |
2723 | * RETURNS: | |
2724 | * 0 on success, negative errno on failure | |
2725 | */ | |
936fd732 | 2726 | int sata_down_spd_limit(struct ata_link *link) |
1c3fae4d | 2727 | { |
81952c54 TH |
2728 | u32 sstatus, spd, mask; |
2729 | int rc, highbit; | |
1c3fae4d | 2730 | |
936fd732 | 2731 | if (!sata_scr_valid(link)) |
008a7896 TH |
2732 | return -EOPNOTSUPP; |
2733 | ||
2734 | /* If SCR can be read, use it to determine the current SPD. | |
936fd732 | 2735 | * If not, use cached value in link->sata_spd. |
008a7896 | 2736 | */ |
936fd732 | 2737 | rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
008a7896 TH |
2738 | if (rc == 0) |
2739 | spd = (sstatus >> 4) & 0xf; | |
2740 | else | |
936fd732 | 2741 | spd = link->sata_spd; |
1c3fae4d | 2742 | |
936fd732 | 2743 | mask = link->sata_spd_limit; |
1c3fae4d TH |
2744 | if (mask <= 1) |
2745 | return -EINVAL; | |
008a7896 TH |
2746 | |
2747 | /* unconditionally mask off the highest bit */ | |
1c3fae4d TH |
2748 | highbit = fls(mask) - 1; |
2749 | mask &= ~(1 << highbit); | |
2750 | ||
008a7896 TH |
2751 | /* Mask off all speeds higher than or equal to the current |
2752 | * one. Force 1.5Gbps if current SPD is not available. | |
2753 | */ | |
2754 | if (spd > 1) | |
2755 | mask &= (1 << (spd - 1)) - 1; | |
2756 | else | |
2757 | mask &= 1; | |
2758 | ||
2759 | /* were we already at the bottom? */ | |
1c3fae4d TH |
2760 | if (!mask) |
2761 | return -EINVAL; | |
2762 | ||
936fd732 | 2763 | link->sata_spd_limit = mask; |
1c3fae4d | 2764 | |
936fd732 | 2765 | ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
f15a1daf | 2766 | sata_spd_string(fls(mask))); |
1c3fae4d TH |
2767 | |
2768 | return 0; | |
2769 | } | |
2770 | ||
936fd732 | 2771 | static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
1c3fae4d | 2772 | { |
5270222f TH |
2773 | struct ata_link *host_link = &link->ap->link; |
2774 | u32 limit, target, spd; | |
1c3fae4d | 2775 | |
5270222f TH |
2776 | limit = link->sata_spd_limit; |
2777 | ||
2778 | /* Don't configure downstream link faster than upstream link. | |
2779 | * It doesn't speed up anything and some PMPs choke on such | |
2780 | * configuration. | |
2781 | */ | |
2782 | if (!ata_is_host_link(link) && host_link->sata_spd) | |
2783 | limit &= (1 << host_link->sata_spd) - 1; | |
2784 | ||
2785 | if (limit == UINT_MAX) | |
2786 | target = 0; | |
1c3fae4d | 2787 | else |
5270222f | 2788 | target = fls(limit); |
1c3fae4d TH |
2789 | |
2790 | spd = (*scontrol >> 4) & 0xf; | |
5270222f | 2791 | *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
1c3fae4d | 2792 | |
5270222f | 2793 | return spd != target; |
1c3fae4d TH |
2794 | } |
2795 | ||
2796 | /** | |
3c567b7d | 2797 | * sata_set_spd_needed - is SATA spd configuration needed |
936fd732 | 2798 | * @link: Link in question |
1c3fae4d TH |
2799 | * |
2800 | * Test whether the spd limit in SControl matches | |
936fd732 | 2801 | * @link->sata_spd_limit. This function is used to determine |
1c3fae4d TH |
2802 | * whether hardreset is necessary to apply SATA spd |
2803 | * configuration. | |
2804 | * | |
2805 | * LOCKING: | |
2806 | * Inherited from caller. | |
2807 | * | |
2808 | * RETURNS: | |
2809 | * 1 if SATA spd configuration is needed, 0 otherwise. | |
2810 | */ | |
936fd732 | 2811 | int sata_set_spd_needed(struct ata_link *link) |
1c3fae4d TH |
2812 | { |
2813 | u32 scontrol; | |
2814 | ||
936fd732 | 2815 | if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
db64bcf3 | 2816 | return 1; |
1c3fae4d | 2817 | |
936fd732 | 2818 | return __sata_set_spd_needed(link, &scontrol); |
1c3fae4d TH |
2819 | } |
2820 | ||
2821 | /** | |
3c567b7d | 2822 | * sata_set_spd - set SATA spd according to spd limit |
936fd732 | 2823 | * @link: Link to set SATA spd for |
1c3fae4d | 2824 | * |
936fd732 | 2825 | * Set SATA spd of @link according to sata_spd_limit. |
1c3fae4d TH |
2826 | * |
2827 | * LOCKING: | |
2828 | * Inherited from caller. | |
2829 | * | |
2830 | * RETURNS: | |
2831 | * 0 if spd doesn't need to be changed, 1 if spd has been | |
81952c54 | 2832 | * changed. Negative errno if SCR registers are inaccessible. |
1c3fae4d | 2833 | */ |
936fd732 | 2834 | int sata_set_spd(struct ata_link *link) |
1c3fae4d TH |
2835 | { |
2836 | u32 scontrol; | |
81952c54 | 2837 | int rc; |
1c3fae4d | 2838 | |
936fd732 | 2839 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 2840 | return rc; |
1c3fae4d | 2841 | |
936fd732 | 2842 | if (!__sata_set_spd_needed(link, &scontrol)) |
1c3fae4d TH |
2843 | return 0; |
2844 | ||
936fd732 | 2845 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 TH |
2846 | return rc; |
2847 | ||
1c3fae4d TH |
2848 | return 1; |
2849 | } | |
2850 | ||
452503f9 AC |
2851 | /* |
2852 | * This mode timing computation functionality is ported over from | |
2853 | * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik | |
2854 | */ | |
2855 | /* | |
b352e57d | 2856 | * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
452503f9 | 2857 | * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
b352e57d AC |
2858 | * for UDMA6, which is currently supported only by Maxtor drives. |
2859 | * | |
2860 | * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. | |
452503f9 AC |
2861 | */ |
2862 | ||
2863 | static const struct ata_timing ata_timing[] = { | |
70cd071e TH |
2864 | /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ |
2865 | { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, | |
2866 | { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, | |
2867 | { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, | |
2868 | { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, | |
2869 | { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, | |
2870 | { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, | |
2871 | { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, | |
452503f9 | 2872 | |
70cd071e TH |
2873 | { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, |
2874 | { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, | |
2875 | { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, | |
452503f9 | 2876 | |
70cd071e TH |
2877 | { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, |
2878 | { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, | |
2879 | { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, | |
b352e57d | 2880 | { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, |
70cd071e | 2881 | { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
452503f9 AC |
2882 | |
2883 | /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ | |
70cd071e TH |
2884 | { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
2885 | { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, | |
2886 | { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, | |
2887 | { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, | |
2888 | { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, | |
2889 | { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, | |
2890 | { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, | |
452503f9 AC |
2891 | |
2892 | { 0xFF } | |
2893 | }; | |
2894 | ||
2dcb407e JG |
2895 | #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
2896 | #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) | |
452503f9 AC |
2897 | |
2898 | static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) | |
2899 | { | |
2900 | q->setup = EZ(t->setup * 1000, T); | |
2901 | q->act8b = EZ(t->act8b * 1000, T); | |
2902 | q->rec8b = EZ(t->rec8b * 1000, T); | |
2903 | q->cyc8b = EZ(t->cyc8b * 1000, T); | |
2904 | q->active = EZ(t->active * 1000, T); | |
2905 | q->recover = EZ(t->recover * 1000, T); | |
2906 | q->cycle = EZ(t->cycle * 1000, T); | |
2907 | q->udma = EZ(t->udma * 1000, UT); | |
2908 | } | |
2909 | ||
2910 | void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, | |
2911 | struct ata_timing *m, unsigned int what) | |
2912 | { | |
2913 | if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); | |
2914 | if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); | |
2915 | if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); | |
2916 | if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); | |
2917 | if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); | |
2918 | if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); | |
2919 | if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); | |
2920 | if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); | |
2921 | } | |
2922 | ||
6357357c | 2923 | const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
452503f9 | 2924 | { |
70cd071e TH |
2925 | const struct ata_timing *t = ata_timing; |
2926 | ||
2927 | while (xfer_mode > t->mode) | |
2928 | t++; | |
452503f9 | 2929 | |
70cd071e TH |
2930 | if (xfer_mode == t->mode) |
2931 | return t; | |
2932 | return NULL; | |
452503f9 AC |
2933 | } |
2934 | ||
2935 | int ata_timing_compute(struct ata_device *adev, unsigned short speed, | |
2936 | struct ata_timing *t, int T, int UT) | |
2937 | { | |
2938 | const struct ata_timing *s; | |
2939 | struct ata_timing p; | |
2940 | ||
2941 | /* | |
2e9edbf8 | 2942 | * Find the mode. |
75b1f2f8 | 2943 | */ |
452503f9 AC |
2944 | |
2945 | if (!(s = ata_timing_find_mode(speed))) | |
2946 | return -EINVAL; | |
2947 | ||
75b1f2f8 AL |
2948 | memcpy(t, s, sizeof(*s)); |
2949 | ||
452503f9 AC |
2950 | /* |
2951 | * If the drive is an EIDE drive, it can tell us it needs extended | |
2952 | * PIO/MW_DMA cycle timing. | |
2953 | */ | |
2954 | ||
2955 | if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ | |
2956 | memset(&p, 0, sizeof(p)); | |
2dcb407e | 2957 | if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
452503f9 AC |
2958 | if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
2959 | else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; | |
2dcb407e | 2960 | } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
452503f9 AC |
2961 | p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
2962 | } | |
2963 | ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); | |
2964 | } | |
2965 | ||
2966 | /* | |
2967 | * Convert the timing to bus clock counts. | |
2968 | */ | |
2969 | ||
75b1f2f8 | 2970 | ata_timing_quantize(t, t, T, UT); |
452503f9 AC |
2971 | |
2972 | /* | |
c893a3ae RD |
2973 | * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
2974 | * S.M.A.R.T * and some other commands. We have to ensure that the | |
2975 | * DMA cycle timing is slower/equal than the fastest PIO timing. | |
452503f9 AC |
2976 | */ |
2977 | ||
fd3367af | 2978 | if (speed > XFER_PIO_6) { |
452503f9 AC |
2979 | ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
2980 | ata_timing_merge(&p, t, t, ATA_TIMING_ALL); | |
2981 | } | |
2982 | ||
2983 | /* | |
c893a3ae | 2984 | * Lengthen active & recovery time so that cycle time is correct. |
452503f9 AC |
2985 | */ |
2986 | ||
2987 | if (t->act8b + t->rec8b < t->cyc8b) { | |
2988 | t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; | |
2989 | t->rec8b = t->cyc8b - t->act8b; | |
2990 | } | |
2991 | ||
2992 | if (t->active + t->recover < t->cycle) { | |
2993 | t->active += (t->cycle - (t->active + t->recover)) / 2; | |
2994 | t->recover = t->cycle - t->active; | |
2995 | } | |
a617c09f | 2996 | |
4f701d1e AC |
2997 | /* In a few cases quantisation may produce enough errors to |
2998 | leave t->cycle too low for the sum of active and recovery | |
2999 | if so we must correct this */ | |
3000 | if (t->active + t->recover > t->cycle) | |
3001 | t->cycle = t->active + t->recover; | |
452503f9 AC |
3002 | |
3003 | return 0; | |
3004 | } | |
3005 | ||
a0f79b92 TH |
3006 | /** |
3007 | * ata_timing_cycle2mode - find xfer mode for the specified cycle duration | |
3008 | * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. | |
3009 | * @cycle: cycle duration in ns | |
3010 | * | |
3011 | * Return matching xfer mode for @cycle. The returned mode is of | |
3012 | * the transfer type specified by @xfer_shift. If @cycle is too | |
3013 | * slow for @xfer_shift, 0xff is returned. If @cycle is faster | |
3014 | * than the fastest known mode, the fasted mode is returned. | |
3015 | * | |
3016 | * LOCKING: | |
3017 | * None. | |
3018 | * | |
3019 | * RETURNS: | |
3020 | * Matching xfer_mode, 0xff if no match found. | |
3021 | */ | |
3022 | u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) | |
3023 | { | |
3024 | u8 base_mode = 0xff, last_mode = 0xff; | |
3025 | const struct ata_xfer_ent *ent; | |
3026 | const struct ata_timing *t; | |
3027 | ||
3028 | for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) | |
3029 | if (ent->shift == xfer_shift) | |
3030 | base_mode = ent->base; | |
3031 | ||
3032 | for (t = ata_timing_find_mode(base_mode); | |
3033 | t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { | |
3034 | unsigned short this_cycle; | |
3035 | ||
3036 | switch (xfer_shift) { | |
3037 | case ATA_SHIFT_PIO: | |
3038 | case ATA_SHIFT_MWDMA: | |
3039 | this_cycle = t->cycle; | |
3040 | break; | |
3041 | case ATA_SHIFT_UDMA: | |
3042 | this_cycle = t->udma; | |
3043 | break; | |
3044 | default: | |
3045 | return 0xff; | |
3046 | } | |
3047 | ||
3048 | if (cycle > this_cycle) | |
3049 | break; | |
3050 | ||
3051 | last_mode = t->mode; | |
3052 | } | |
3053 | ||
3054 | return last_mode; | |
3055 | } | |
3056 | ||
cf176e1a TH |
3057 | /** |
3058 | * ata_down_xfermask_limit - adjust dev xfer masks downward | |
cf176e1a | 3059 | * @dev: Device to adjust xfer masks |
458337db | 3060 | * @sel: ATA_DNXFER_* selector |
cf176e1a TH |
3061 | * |
3062 | * Adjust xfer masks of @dev downward. Note that this function | |
3063 | * does not apply the change. Invoking ata_set_mode() afterwards | |
3064 | * will apply the limit. | |
3065 | * | |
3066 | * LOCKING: | |
3067 | * Inherited from caller. | |
3068 | * | |
3069 | * RETURNS: | |
3070 | * 0 on success, negative errno on failure | |
3071 | */ | |
458337db | 3072 | int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
cf176e1a | 3073 | { |
458337db | 3074 | char buf[32]; |
7dc951ae TH |
3075 | unsigned long orig_mask, xfer_mask; |
3076 | unsigned long pio_mask, mwdma_mask, udma_mask; | |
458337db | 3077 | int quiet, highbit; |
cf176e1a | 3078 | |
458337db TH |
3079 | quiet = !!(sel & ATA_DNXFER_QUIET); |
3080 | sel &= ~ATA_DNXFER_QUIET; | |
cf176e1a | 3081 | |
458337db TH |
3082 | xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
3083 | dev->mwdma_mask, | |
3084 | dev->udma_mask); | |
3085 | ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); | |
cf176e1a | 3086 | |
458337db TH |
3087 | switch (sel) { |
3088 | case ATA_DNXFER_PIO: | |
3089 | highbit = fls(pio_mask) - 1; | |
3090 | pio_mask &= ~(1 << highbit); | |
3091 | break; | |
3092 | ||
3093 | case ATA_DNXFER_DMA: | |
3094 | if (udma_mask) { | |
3095 | highbit = fls(udma_mask) - 1; | |
3096 | udma_mask &= ~(1 << highbit); | |
3097 | if (!udma_mask) | |
3098 | return -ENOENT; | |
3099 | } else if (mwdma_mask) { | |
3100 | highbit = fls(mwdma_mask) - 1; | |
3101 | mwdma_mask &= ~(1 << highbit); | |
3102 | if (!mwdma_mask) | |
3103 | return -ENOENT; | |
3104 | } | |
3105 | break; | |
3106 | ||
3107 | case ATA_DNXFER_40C: | |
3108 | udma_mask &= ATA_UDMA_MASK_40C; | |
3109 | break; | |
3110 | ||
3111 | case ATA_DNXFER_FORCE_PIO0: | |
3112 | pio_mask &= 1; | |
3113 | case ATA_DNXFER_FORCE_PIO: | |
3114 | mwdma_mask = 0; | |
3115 | udma_mask = 0; | |
3116 | break; | |
3117 | ||
458337db TH |
3118 | default: |
3119 | BUG(); | |
3120 | } | |
3121 | ||
3122 | xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); | |
3123 | ||
3124 | if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) | |
3125 | return -ENOENT; | |
3126 | ||
3127 | if (!quiet) { | |
3128 | if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) | |
3129 | snprintf(buf, sizeof(buf), "%s:%s", | |
3130 | ata_mode_string(xfer_mask), | |
3131 | ata_mode_string(xfer_mask & ATA_MASK_PIO)); | |
3132 | else | |
3133 | snprintf(buf, sizeof(buf), "%s", | |
3134 | ata_mode_string(xfer_mask)); | |
3135 | ||
3136 | ata_dev_printk(dev, KERN_WARNING, | |
3137 | "limiting speed to %s\n", buf); | |
3138 | } | |
cf176e1a TH |
3139 | |
3140 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, | |
3141 | &dev->udma_mask); | |
3142 | ||
cf176e1a | 3143 | return 0; |
cf176e1a TH |
3144 | } |
3145 | ||
3373efd8 | 3146 | static int ata_dev_set_mode(struct ata_device *dev) |
1da177e4 | 3147 | { |
9af5c9c9 | 3148 | struct ata_eh_context *ehc = &dev->link->eh_context; |
4055dee7 TH |
3149 | const char *dev_err_whine = ""; |
3150 | int ign_dev_err = 0; | |
83206a29 TH |
3151 | unsigned int err_mask; |
3152 | int rc; | |
1da177e4 | 3153 | |
e8384607 | 3154 | dev->flags &= ~ATA_DFLAG_PIO; |
1da177e4 LT |
3155 | if (dev->xfer_shift == ATA_SHIFT_PIO) |
3156 | dev->flags |= ATA_DFLAG_PIO; | |
3157 | ||
3373efd8 | 3158 | err_mask = ata_dev_set_xfermode(dev); |
2dcb407e | 3159 | |
4055dee7 TH |
3160 | if (err_mask & ~AC_ERR_DEV) |
3161 | goto fail; | |
3162 | ||
3163 | /* revalidate */ | |
3164 | ehc->i.flags |= ATA_EHI_POST_SETMODE; | |
3165 | rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); | |
3166 | ehc->i.flags &= ~ATA_EHI_POST_SETMODE; | |
3167 | if (rc) | |
3168 | return rc; | |
3169 | ||
11750a40 A |
3170 | /* Old CFA may refuse this command, which is just fine */ |
3171 | if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) | |
4055dee7 | 3172 | ign_dev_err = 1; |
2dcb407e | 3173 | |
0bc2a79a AC |
3174 | /* Some very old devices and some bad newer ones fail any kind of |
3175 | SET_XFERMODE request but support PIO0-2 timings and no IORDY */ | |
3176 | if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && | |
3177 | dev->pio_mode <= XFER_PIO_2) | |
4055dee7 | 3178 | ign_dev_err = 1; |
2dcb407e | 3179 | |
3acaf94b AC |
3180 | /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
3181 | Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ | |
c5038fc0 | 3182 | if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
3acaf94b AC |
3183 | dev->dma_mode == XFER_MW_DMA_0 && |
3184 | (dev->id[63] >> 8) & 1) | |
4055dee7 | 3185 | ign_dev_err = 1; |
3acaf94b | 3186 | |
4055dee7 TH |
3187 | /* if the device is actually configured correctly, ignore dev err */ |
3188 | if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) | |
3189 | ign_dev_err = 1; | |
1da177e4 | 3190 | |
4055dee7 TH |
3191 | if (err_mask & AC_ERR_DEV) { |
3192 | if (!ign_dev_err) | |
3193 | goto fail; | |
3194 | else | |
3195 | dev_err_whine = " (device error ignored)"; | |
3196 | } | |
48a8a14f | 3197 | |
23e71c3d TH |
3198 | DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
3199 | dev->xfer_shift, (int)dev->xfer_mode); | |
1da177e4 | 3200 | |
4055dee7 TH |
3201 | ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", |
3202 | ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), | |
3203 | dev_err_whine); | |
3204 | ||
83206a29 | 3205 | return 0; |
4055dee7 TH |
3206 | |
3207 | fail: | |
3208 | ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " | |
3209 | "(err_mask=0x%x)\n", err_mask); | |
3210 | return -EIO; | |
1da177e4 LT |
3211 | } |
3212 | ||
1da177e4 | 3213 | /** |
04351821 | 3214 | * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
0260731f | 3215 | * @link: link on which timings will be programmed |
1967b7ff | 3216 | * @r_failed_dev: out parameter for failed device |
1da177e4 | 3217 | * |
04351821 A |
3218 | * Standard implementation of the function used to tune and set |
3219 | * ATA device disk transfer mode (PIO3, UDMA6, etc.). If | |
3220 | * ata_dev_set_mode() fails, pointer to the failing device is | |
e82cbdb9 | 3221 | * returned in @r_failed_dev. |
780a87f7 | 3222 | * |
1da177e4 | 3223 | * LOCKING: |
0cba632b | 3224 | * PCI/etc. bus probe sem. |
e82cbdb9 TH |
3225 | * |
3226 | * RETURNS: | |
3227 | * 0 on success, negative errno otherwise | |
1da177e4 | 3228 | */ |
04351821 | 3229 | |
0260731f | 3230 | int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
1da177e4 | 3231 | { |
0260731f | 3232 | struct ata_port *ap = link->ap; |
e8e0619f | 3233 | struct ata_device *dev; |
f58229f8 | 3234 | int rc = 0, used_dma = 0, found = 0; |
3adcebb2 | 3235 | |
a6d5a51c | 3236 | /* step 1: calculate xfer_mask */ |
f58229f8 | 3237 | ata_link_for_each_dev(dev, link) { |
7dc951ae | 3238 | unsigned long pio_mask, dma_mask; |
b3a70601 | 3239 | unsigned int mode_mask; |
a6d5a51c | 3240 | |
e1211e3f | 3241 | if (!ata_dev_enabled(dev)) |
a6d5a51c TH |
3242 | continue; |
3243 | ||
b3a70601 AC |
3244 | mode_mask = ATA_DMA_MASK_ATA; |
3245 | if (dev->class == ATA_DEV_ATAPI) | |
3246 | mode_mask = ATA_DMA_MASK_ATAPI; | |
3247 | else if (ata_id_is_cfa(dev->id)) | |
3248 | mode_mask = ATA_DMA_MASK_CFA; | |
3249 | ||
3373efd8 | 3250 | ata_dev_xfermask(dev); |
33267325 | 3251 | ata_force_xfermask(dev); |
1da177e4 | 3252 | |
acf356b1 TH |
3253 | pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
3254 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
b3a70601 AC |
3255 | |
3256 | if (libata_dma_mask & mode_mask) | |
3257 | dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); | |
3258 | else | |
3259 | dma_mask = 0; | |
3260 | ||
acf356b1 TH |
3261 | dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
3262 | dev->dma_mode = ata_xfer_mask2mode(dma_mask); | |
5444a6f4 | 3263 | |
4f65977d | 3264 | found = 1; |
70cd071e | 3265 | if (dev->dma_mode != 0xff) |
5444a6f4 | 3266 | used_dma = 1; |
a6d5a51c | 3267 | } |
4f65977d | 3268 | if (!found) |
e82cbdb9 | 3269 | goto out; |
a6d5a51c TH |
3270 | |
3271 | /* step 2: always set host PIO timings */ | |
f58229f8 | 3272 | ata_link_for_each_dev(dev, link) { |
e8e0619f TH |
3273 | if (!ata_dev_enabled(dev)) |
3274 | continue; | |
3275 | ||
70cd071e | 3276 | if (dev->pio_mode == 0xff) { |
f15a1daf | 3277 | ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
e8e0619f | 3278 | rc = -EINVAL; |
e82cbdb9 | 3279 | goto out; |
e8e0619f TH |
3280 | } |
3281 | ||
3282 | dev->xfer_mode = dev->pio_mode; | |
3283 | dev->xfer_shift = ATA_SHIFT_PIO; | |
3284 | if (ap->ops->set_piomode) | |
3285 | ap->ops->set_piomode(ap, dev); | |
3286 | } | |
1da177e4 | 3287 | |
a6d5a51c | 3288 | /* step 3: set host DMA timings */ |
f58229f8 | 3289 | ata_link_for_each_dev(dev, link) { |
70cd071e | 3290 | if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff) |
e8e0619f TH |
3291 | continue; |
3292 | ||
3293 | dev->xfer_mode = dev->dma_mode; | |
3294 | dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); | |
3295 | if (ap->ops->set_dmamode) | |
3296 | ap->ops->set_dmamode(ap, dev); | |
3297 | } | |
1da177e4 LT |
3298 | |
3299 | /* step 4: update devices' xfer mode */ | |
f58229f8 | 3300 | ata_link_for_each_dev(dev, link) { |
18d90deb | 3301 | /* don't update suspended devices' xfer mode */ |
9666f400 | 3302 | if (!ata_dev_enabled(dev)) |
83206a29 TH |
3303 | continue; |
3304 | ||
3373efd8 | 3305 | rc = ata_dev_set_mode(dev); |
5bbc53f4 | 3306 | if (rc) |
e82cbdb9 | 3307 | goto out; |
83206a29 | 3308 | } |
1da177e4 | 3309 | |
e8e0619f TH |
3310 | /* Record simplex status. If we selected DMA then the other |
3311 | * host channels are not permitted to do so. | |
5444a6f4 | 3312 | */ |
cca3974e | 3313 | if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
032af1ce | 3314 | ap->host->simplex_claimed = ap; |
5444a6f4 | 3315 | |
e82cbdb9 TH |
3316 | out: |
3317 | if (rc) | |
3318 | *r_failed_dev = dev; | |
3319 | return rc; | |
1da177e4 LT |
3320 | } |
3321 | ||
d7bb4cc7 | 3322 | /** |
936fd732 TH |
3323 | * sata_link_debounce - debounce SATA phy status |
3324 | * @link: ATA link to debounce SATA phy status for | |
d7bb4cc7 | 3325 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3326 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3327 | * |
936fd732 | 3328 | * Make sure SStatus of @link reaches stable state, determined by |
d7bb4cc7 TH |
3329 | * holding the same value where DET is not 1 for @duration polled |
3330 | * every @interval, before @timeout. Timeout constraints the | |
d4b2bab4 TH |
3331 | * beginning of the stable state. Because DET gets stuck at 1 on |
3332 | * some controllers after hot unplugging, this functions waits | |
d7bb4cc7 TH |
3333 | * until timeout then returns 0 if DET is stable at 1. |
3334 | * | |
d4b2bab4 TH |
3335 | * @timeout is further limited by @deadline. The sooner of the |
3336 | * two is used. | |
3337 | * | |
d7bb4cc7 TH |
3338 | * LOCKING: |
3339 | * Kernel thread context (may sleep) | |
3340 | * | |
3341 | * RETURNS: | |
3342 | * 0 on success, -errno on failure. | |
3343 | */ | |
936fd732 TH |
3344 | int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
3345 | unsigned long deadline) | |
7a7921e8 | 3346 | { |
d7bb4cc7 | 3347 | unsigned long interval_msec = params[0]; |
d4b2bab4 TH |
3348 | unsigned long duration = msecs_to_jiffies(params[1]); |
3349 | unsigned long last_jiffies, t; | |
d7bb4cc7 TH |
3350 | u32 last, cur; |
3351 | int rc; | |
3352 | ||
d4b2bab4 TH |
3353 | t = jiffies + msecs_to_jiffies(params[2]); |
3354 | if (time_before(t, deadline)) | |
3355 | deadline = t; | |
3356 | ||
936fd732 | 3357 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3358 | return rc; |
3359 | cur &= 0xf; | |
3360 | ||
3361 | last = cur; | |
3362 | last_jiffies = jiffies; | |
3363 | ||
3364 | while (1) { | |
3365 | msleep(interval_msec); | |
936fd732 | 3366 | if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
d7bb4cc7 TH |
3367 | return rc; |
3368 | cur &= 0xf; | |
3369 | ||
3370 | /* DET stable? */ | |
3371 | if (cur == last) { | |
d4b2bab4 | 3372 | if (cur == 1 && time_before(jiffies, deadline)) |
d7bb4cc7 TH |
3373 | continue; |
3374 | if (time_after(jiffies, last_jiffies + duration)) | |
3375 | return 0; | |
3376 | continue; | |
3377 | } | |
3378 | ||
3379 | /* unstable, start over */ | |
3380 | last = cur; | |
3381 | last_jiffies = jiffies; | |
3382 | ||
f1545154 TH |
3383 | /* Check deadline. If debouncing failed, return |
3384 | * -EPIPE to tell upper layer to lower link speed. | |
3385 | */ | |
d4b2bab4 | 3386 | if (time_after(jiffies, deadline)) |
f1545154 | 3387 | return -EPIPE; |
d7bb4cc7 TH |
3388 | } |
3389 | } | |
3390 | ||
3391 | /** | |
936fd732 TH |
3392 | * sata_link_resume - resume SATA link |
3393 | * @link: ATA link to resume SATA | |
d7bb4cc7 | 3394 | * @params: timing parameters { interval, duratinon, timeout } in msec |
d4b2bab4 | 3395 | * @deadline: deadline jiffies for the operation |
d7bb4cc7 | 3396 | * |
936fd732 | 3397 | * Resume SATA phy @link and debounce it. |
d7bb4cc7 TH |
3398 | * |
3399 | * LOCKING: | |
3400 | * Kernel thread context (may sleep) | |
3401 | * | |
3402 | * RETURNS: | |
3403 | * 0 on success, -errno on failure. | |
3404 | */ | |
936fd732 TH |
3405 | int sata_link_resume(struct ata_link *link, const unsigned long *params, |
3406 | unsigned long deadline) | |
d7bb4cc7 TH |
3407 | { |
3408 | u32 scontrol; | |
81952c54 TH |
3409 | int rc; |
3410 | ||
936fd732 | 3411 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
81952c54 | 3412 | return rc; |
7a7921e8 | 3413 | |
852ee16a | 3414 | scontrol = (scontrol & 0x0f0) | 0x300; |
81952c54 | 3415 | |
936fd732 | 3416 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
81952c54 | 3417 | return rc; |
7a7921e8 | 3418 | |
d7bb4cc7 TH |
3419 | /* Some PHYs react badly if SStatus is pounded immediately |
3420 | * after resuming. Delay 200ms before debouncing. | |
3421 | */ | |
3422 | msleep(200); | |
7a7921e8 | 3423 | |
936fd732 | 3424 | return sata_link_debounce(link, params, deadline); |
7a7921e8 TH |
3425 | } |
3426 | ||
f5914a46 | 3427 | /** |
9363c382 | 3428 | * ata_sff_prereset - prepare for reset |
cc0680a5 | 3429 | * @link: ATA link to be reset |
d4b2bab4 | 3430 | * @deadline: deadline jiffies for the operation |
f5914a46 | 3431 | * |
cc0680a5 | 3432 | * @link is about to be reset. Initialize it. Failure from |
b8cffc6a TH |
3433 | * prereset makes libata abort whole reset sequence and give up |
3434 | * that port, so prereset should be best-effort. It does its | |
3435 | * best to prepare for reset sequence but if things go wrong, it | |
3436 | * should just whine, not fail. | |
f5914a46 TH |
3437 | * |
3438 | * LOCKING: | |
3439 | * Kernel thread context (may sleep) | |
3440 | * | |
3441 | * RETURNS: | |
3442 | * 0 on success, -errno otherwise. | |
3443 | */ | |
9363c382 | 3444 | int ata_sff_prereset(struct ata_link *link, unsigned long deadline) |
f5914a46 | 3445 | { |
cc0680a5 | 3446 | struct ata_port *ap = link->ap; |
936fd732 | 3447 | struct ata_eh_context *ehc = &link->eh_context; |
e9c83914 | 3448 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
f5914a46 TH |
3449 | int rc; |
3450 | ||
f5914a46 TH |
3451 | /* if we're about to do hardreset, nothing more to do */ |
3452 | if (ehc->i.action & ATA_EH_HARDRESET) | |
3453 | return 0; | |
3454 | ||
936fd732 | 3455 | /* if SATA, resume link */ |
a16abc0b | 3456 | if (ap->flags & ATA_FLAG_SATA) { |
936fd732 | 3457 | rc = sata_link_resume(link, timing, deadline); |
b8cffc6a TH |
3458 | /* whine about phy resume failure but proceed */ |
3459 | if (rc && rc != -EOPNOTSUPP) | |
cc0680a5 | 3460 | ata_link_printk(link, KERN_WARNING, "failed to resume " |
f5914a46 | 3461 | "link for reset (errno=%d)\n", rc); |
f5914a46 TH |
3462 | } |
3463 | ||
8cebf274 TH |
3464 | /* wait for !BSY if we don't know that no device is attached */ |
3465 | if (!ata_link_offline(link)) { | |
9363c382 | 3466 | rc = ata_sff_wait_ready(ap, deadline); |
6dffaf61 | 3467 | if (rc && rc != -ENODEV) { |
cc0680a5 | 3468 | ata_link_printk(link, KERN_WARNING, "device not ready " |
b8cffc6a TH |
3469 | "(errno=%d), forcing hardreset\n", rc); |
3470 | ehc->i.action |= ATA_EH_HARDRESET; | |
3471 | } | |
3472 | } | |
f5914a46 TH |
3473 | |
3474 | return 0; | |
3475 | } | |
3476 | ||
c2bd5804 | 3477 | /** |
624d5c51 TH |
3478 | * sata_link_hardreset - reset link via SATA phy reset |
3479 | * @link: link to reset | |
3480 | * @timing: timing parameters { interval, duratinon, timeout } in msec | |
d4b2bab4 | 3481 | * @deadline: deadline jiffies for the operation |
c2bd5804 | 3482 | * |
624d5c51 | 3483 | * SATA phy-reset @link using DET bits of SControl register. |
c2bd5804 TH |
3484 | * |
3485 | * LOCKING: | |
3486 | * Kernel thread context (may sleep) | |
3487 | * | |
3488 | * RETURNS: | |
3489 | * 0 on success, -errno otherwise. | |
3490 | */ | |
624d5c51 TH |
3491 | int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
3492 | unsigned long deadline) | |
c2bd5804 | 3493 | { |
624d5c51 | 3494 | u32 scontrol; |
81952c54 | 3495 | int rc; |
852ee16a | 3496 | |
c2bd5804 TH |
3497 | DPRINTK("ENTER\n"); |
3498 | ||
936fd732 | 3499 | if (sata_set_spd_needed(link)) { |
1c3fae4d TH |
3500 | /* SATA spec says nothing about how to reconfigure |
3501 | * spd. To be on the safe side, turn off phy during | |
3502 | * reconfiguration. This works for at least ICH7 AHCI | |
3503 | * and Sil3124. | |
3504 | */ | |
936fd732 | 3505 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3506 | goto out; |
81952c54 | 3507 | |
a34b6fc0 | 3508 | scontrol = (scontrol & 0x0f0) | 0x304; |
81952c54 | 3509 | |
936fd732 | 3510 | if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3511 | goto out; |
1c3fae4d | 3512 | |
936fd732 | 3513 | sata_set_spd(link); |
1c3fae4d TH |
3514 | } |
3515 | ||
3516 | /* issue phy wake/reset */ | |
936fd732 | 3517 | if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
b6103f6d | 3518 | goto out; |
81952c54 | 3519 | |
852ee16a | 3520 | scontrol = (scontrol & 0x0f0) | 0x301; |
81952c54 | 3521 | |
936fd732 | 3522 | if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
b6103f6d | 3523 | goto out; |
c2bd5804 | 3524 | |
1c3fae4d | 3525 | /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
c2bd5804 TH |
3526 | * 10.4.2 says at least 1 ms. |
3527 | */ | |
3528 | msleep(1); | |
3529 | ||
936fd732 TH |
3530 | /* bring link back */ |
3531 | rc = sata_link_resume(link, timing, deadline); | |
b6103f6d TH |
3532 | out: |
3533 | DPRINTK("EXIT, rc=%d\n", rc); | |
3534 | return rc; | |
3535 | } | |
3536 | ||
c2bd5804 | 3537 | /** |
9363c382 | 3538 | * ata_sff_postreset - standard postreset callback |
cc0680a5 | 3539 | * @link: the target ata_link |
c2bd5804 TH |
3540 | * @classes: classes of attached devices |
3541 | * | |
3542 | * This function is invoked after a successful reset. Note that | |
3543 | * the device might have been reset more than once using | |
3544 | * different reset methods before postreset is invoked. | |
c2bd5804 | 3545 | * |
c2bd5804 TH |
3546 | * LOCKING: |
3547 | * Kernel thread context (may sleep) | |
3548 | */ | |
9363c382 | 3549 | void ata_sff_postreset(struct ata_link *link, unsigned int *classes) |
c2bd5804 | 3550 | { |
cc0680a5 | 3551 | struct ata_port *ap = link->ap; |
dc2b3515 TH |
3552 | u32 serror; |
3553 | ||
c2bd5804 TH |
3554 | DPRINTK("ENTER\n"); |
3555 | ||
c2bd5804 | 3556 | /* print link status */ |
936fd732 | 3557 | sata_print_link_status(link); |
c2bd5804 | 3558 | |
dc2b3515 | 3559 | /* clear SError */ |
936fd732 TH |
3560 | if (sata_scr_read(link, SCR_ERROR, &serror) == 0) |
3561 | sata_scr_write(link, SCR_ERROR, serror); | |
f7fe7ad4 | 3562 | link->eh_info.serror = 0; |
dc2b3515 | 3563 | |
c2bd5804 TH |
3564 | /* is double-select really necessary? */ |
3565 | if (classes[0] != ATA_DEV_NONE) | |
3566 | ap->ops->dev_select(ap, 1); | |
3567 | if (classes[1] != ATA_DEV_NONE) | |
3568 | ap->ops->dev_select(ap, 0); | |
3569 | ||
3a39746a TH |
3570 | /* bail out if no device is present */ |
3571 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { | |
3572 | DPRINTK("EXIT, no device\n"); | |
3573 | return; | |
3574 | } | |
3575 | ||
3576 | /* set up device control */ | |
0d5ff566 TH |
3577 | if (ap->ioaddr.ctl_addr) |
3578 | iowrite8(ap->ctl, ap->ioaddr.ctl_addr); | |
c2bd5804 TH |
3579 | |
3580 | DPRINTK("EXIT\n"); | |
3581 | } | |
3582 | ||
623a3128 TH |
3583 | /** |
3584 | * ata_dev_same_device - Determine whether new ID matches configured device | |
623a3128 TH |
3585 | * @dev: device to compare against |
3586 | * @new_class: class of the new device | |
3587 | * @new_id: IDENTIFY page of the new device | |
3588 | * | |
3589 | * Compare @new_class and @new_id against @dev and determine | |
3590 | * whether @dev is the device indicated by @new_class and | |
3591 | * @new_id. | |
3592 | * | |
3593 | * LOCKING: | |
3594 | * None. | |
3595 | * | |
3596 | * RETURNS: | |
3597 | * 1 if @dev matches @new_class and @new_id, 0 otherwise. | |
3598 | */ | |
3373efd8 TH |
3599 | static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
3600 | const u16 *new_id) | |
623a3128 TH |
3601 | { |
3602 | const u16 *old_id = dev->id; | |
a0cf733b TH |
3603 | unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
3604 | unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; | |
623a3128 TH |
3605 | |
3606 | if (dev->class != new_class) { | |
f15a1daf TH |
3607 | ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
3608 | dev->class, new_class); | |
623a3128 TH |
3609 | return 0; |
3610 | } | |
3611 | ||
a0cf733b TH |
3612 | ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
3613 | ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); | |
3614 | ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); | |
3615 | ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); | |
623a3128 TH |
3616 | |
3617 | if (strcmp(model[0], model[1])) { | |
f15a1daf TH |
3618 | ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
3619 | "'%s' != '%s'\n", model[0], model[1]); | |
623a3128 TH |
3620 | return 0; |
3621 | } | |
3622 | ||
3623 | if (strcmp(serial[0], serial[1])) { | |
f15a1daf TH |
3624 | ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
3625 | "'%s' != '%s'\n", serial[0], serial[1]); | |
623a3128 TH |
3626 | return 0; |
3627 | } | |
3628 | ||
623a3128 TH |
3629 | return 1; |
3630 | } | |
3631 | ||
3632 | /** | |
fe30911b | 3633 | * ata_dev_reread_id - Re-read IDENTIFY data |
3fae450c | 3634 | * @dev: target ATA device |
bff04647 | 3635 | * @readid_flags: read ID flags |
623a3128 TH |
3636 | * |
3637 | * Re-read IDENTIFY page and make sure @dev is still attached to | |
3638 | * the port. | |
3639 | * | |
3640 | * LOCKING: | |
3641 | * Kernel thread context (may sleep) | |
3642 | * | |
3643 | * RETURNS: | |
3644 | * 0 on success, negative errno otherwise | |
3645 | */ | |
fe30911b | 3646 | int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
623a3128 | 3647 | { |
5eb45c02 | 3648 | unsigned int class = dev->class; |
9af5c9c9 | 3649 | u16 *id = (void *)dev->link->ap->sector_buf; |
623a3128 TH |
3650 | int rc; |
3651 | ||
fe635c7e | 3652 | /* read ID data */ |
bff04647 | 3653 | rc = ata_dev_read_id(dev, &class, readid_flags, id); |
623a3128 | 3654 | if (rc) |
fe30911b | 3655 | return rc; |
623a3128 TH |
3656 | |
3657 | /* is the device still there? */ | |
fe30911b TH |
3658 | if (!ata_dev_same_device(dev, class, id)) |
3659 | return -ENODEV; | |
623a3128 | 3660 | |
fe635c7e | 3661 | memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
fe30911b TH |
3662 | return 0; |
3663 | } | |
3664 | ||
3665 | /** | |
3666 | * ata_dev_revalidate - Revalidate ATA device | |
3667 | * @dev: device to revalidate | |
422c9daa | 3668 | * @new_class: new class code |
fe30911b TH |
3669 | * @readid_flags: read ID flags |
3670 | * | |
3671 | * Re-read IDENTIFY page, make sure @dev is still attached to the | |
3672 | * port and reconfigure it according to the new IDENTIFY page. | |
3673 | * | |
3674 | * LOCKING: | |
3675 | * Kernel thread context (may sleep) | |
3676 | * | |
3677 | * RETURNS: | |
3678 | * 0 on success, negative errno otherwise | |
3679 | */ | |
422c9daa TH |
3680 | int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
3681 | unsigned int readid_flags) | |
fe30911b | 3682 | { |
6ddcd3b0 | 3683 | u64 n_sectors = dev->n_sectors; |
fe30911b TH |
3684 | int rc; |
3685 | ||
3686 | if (!ata_dev_enabled(dev)) | |
3687 | return -ENODEV; | |
3688 | ||
422c9daa TH |
3689 | /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
3690 | if (ata_class_enabled(new_class) && | |
3691 | new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { | |
3692 | ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", | |
3693 | dev->class, new_class); | |
3694 | rc = -ENODEV; | |
3695 | goto fail; | |
3696 | } | |
3697 | ||
fe30911b TH |
3698 | /* re-read ID */ |
3699 | rc = ata_dev_reread_id(dev, readid_flags); | |
3700 | if (rc) | |
3701 | goto fail; | |
623a3128 TH |
3702 | |
3703 | /* configure device according to the new ID */ | |
efdaedc4 | 3704 | rc = ata_dev_configure(dev); |
6ddcd3b0 TH |
3705 | if (rc) |
3706 | goto fail; | |
3707 | ||
3708 | /* verify n_sectors hasn't changed */ | |
b54eebd6 TH |
3709 | if (dev->class == ATA_DEV_ATA && n_sectors && |
3710 | dev->n_sectors != n_sectors) { | |
6ddcd3b0 TH |
3711 | ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
3712 | "%llu != %llu\n", | |
3713 | (unsigned long long)n_sectors, | |
3714 | (unsigned long long)dev->n_sectors); | |
8270bec4 TH |
3715 | |
3716 | /* restore original n_sectors */ | |
3717 | dev->n_sectors = n_sectors; | |
3718 | ||
6ddcd3b0 TH |
3719 | rc = -ENODEV; |
3720 | goto fail; | |
3721 | } | |
3722 | ||
3723 | return 0; | |
623a3128 TH |
3724 | |
3725 | fail: | |
f15a1daf | 3726 | ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
623a3128 TH |
3727 | return rc; |
3728 | } | |
3729 | ||
6919a0a6 AC |
3730 | struct ata_blacklist_entry { |
3731 | const char *model_num; | |
3732 | const char *model_rev; | |
3733 | unsigned long horkage; | |
3734 | }; | |
3735 | ||
3736 | static const struct ata_blacklist_entry ata_device_blacklist [] = { | |
3737 | /* Devices with DMA related problems under Linux */ | |
3738 | { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, | |
3739 | { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, | |
3740 | { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, | |
3741 | { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, | |
3742 | { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, | |
3743 | { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, | |
3744 | { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, | |
3745 | { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, | |
3746 | { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, | |
3747 | { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, | |
3748 | { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, | |
3749 | { "CRD-84", NULL, ATA_HORKAGE_NODMA }, | |
3750 | { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, | |
3751 | { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, | |
3752 | { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, | |
3753 | { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, | |
3754 | { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, | |
3755 | { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, | |
3756 | { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, | |
3757 | { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, | |
3758 | { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, | |
3759 | { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, | |
3760 | { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, | |
3761 | { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, | |
3762 | { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, | |
3763 | { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, | |
6919a0a6 AC |
3764 | { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
3765 | { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, | |
2dcb407e | 3766 | { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
39f19886 | 3767 | { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
3af9a77a TH |
3768 | /* Odd clown on sil3726/4726 PMPs */ |
3769 | { "Config Disk", NULL, ATA_HORKAGE_NODMA | | |
3770 | ATA_HORKAGE_SKIP_PM }, | |
6919a0a6 | 3771 | |
18d6e9d5 | 3772 | /* Weird ATAPI devices */ |
40a1d531 | 3773 | { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
18d6e9d5 | 3774 | |
6919a0a6 AC |
3775 | /* Devices we expect to fail diagnostics */ |
3776 | ||
3777 | /* Devices where NCQ should be avoided */ | |
3778 | /* NCQ is slow */ | |
2dcb407e | 3779 | { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
459ad688 | 3780 | { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
09125ea6 TH |
3781 | /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
3782 | { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, | |
7acfaf30 | 3783 | /* NCQ is broken */ |
539cc7c7 | 3784 | { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
0e3dbc01 | 3785 | { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
da6f0ec2 | 3786 | { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
e41bd3e8 | 3787 | { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
539cc7c7 | 3788 | |
36e337d0 RH |
3789 | /* Blacklist entries taken from Silicon Image 3124/3132 |
3790 | Windows driver .inf file - also several Linux problem reports */ | |
3791 | { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, | |
3792 | { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, | |
3793 | { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, | |
6919a0a6 | 3794 | |
16c55b03 TH |
3795 | /* devices which puke on READ_NATIVE_MAX */ |
3796 | { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, | |
3797 | { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, | |
3798 | { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, | |
3799 | { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, | |
6919a0a6 | 3800 | |
93328e11 AC |
3801 | /* Devices which report 1 sector over size HPA */ |
3802 | { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
3803 | { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, | |
b152fcd3 | 3804 | { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
93328e11 | 3805 | |
6bbfd53d AC |
3806 | /* Devices which get the IVB wrong */ |
3807 | { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, | |
3808 | { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, | |
e9f33406 PM |
3809 | { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, |
3810 | { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, | |
3811 | { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, | |
6bbfd53d | 3812 | |
6919a0a6 AC |
3813 | /* End Marker */ |
3814 | { } | |
1da177e4 | 3815 | }; |
2e9edbf8 | 3816 | |
741b7763 | 3817 | static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
539cc7c7 JG |
3818 | { |
3819 | const char *p; | |
3820 | int len; | |
3821 | ||
3822 | /* | |
3823 | * check for trailing wildcard: *\0 | |
3824 | */ | |
3825 | p = strchr(patt, wildchar); | |
3826 | if (p && ((*(p + 1)) == 0)) | |
3827 | len = p - patt; | |
317b50b8 | 3828 | else { |
539cc7c7 | 3829 | len = strlen(name); |
317b50b8 AP |
3830 | if (!len) { |
3831 | if (!*patt) | |
3832 | return 0; | |
3833 | return -1; | |
3834 | } | |
3835 | } | |
539cc7c7 JG |
3836 | |
3837 | return strncmp(patt, name, len); | |
3838 | } | |
3839 | ||
75683fe7 | 3840 | static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
1da177e4 | 3841 | { |
8bfa79fc TH |
3842 | unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
3843 | unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; | |
6919a0a6 | 3844 | const struct ata_blacklist_entry *ad = ata_device_blacklist; |
3a778275 | 3845 | |
8bfa79fc TH |
3846 | ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
3847 | ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); | |
1da177e4 | 3848 | |
6919a0a6 | 3849 | while (ad->model_num) { |
539cc7c7 | 3850 | if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
6919a0a6 AC |
3851 | if (ad->model_rev == NULL) |
3852 | return ad->horkage; | |
539cc7c7 | 3853 | if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
6919a0a6 | 3854 | return ad->horkage; |
f4b15fef | 3855 | } |
6919a0a6 | 3856 | ad++; |
f4b15fef | 3857 | } |
1da177e4 LT |
3858 | return 0; |
3859 | } | |
3860 | ||
6919a0a6 AC |
3861 | static int ata_dma_blacklisted(const struct ata_device *dev) |
3862 | { | |
3863 | /* We don't support polling DMA. | |
3864 | * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) | |
3865 | * if the LLDD handles only interrupts in the HSM_ST_LAST state. | |
3866 | */ | |
9af5c9c9 | 3867 | if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
6919a0a6 AC |
3868 | (dev->flags & ATA_DFLAG_CDB_INTR)) |
3869 | return 1; | |
75683fe7 | 3870 | return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
6919a0a6 AC |
3871 | } |
3872 | ||
6bbfd53d AC |
3873 | /** |
3874 | * ata_is_40wire - check drive side detection | |
3875 | * @dev: device | |
3876 | * | |
3877 | * Perform drive side detection decoding, allowing for device vendors | |
3878 | * who can't follow the documentation. | |
3879 | */ | |
3880 | ||
3881 | static int ata_is_40wire(struct ata_device *dev) | |
3882 | { | |
3883 | if (dev->horkage & ATA_HORKAGE_IVB) | |
3884 | return ata_drive_40wire_relaxed(dev->id); | |
3885 | return ata_drive_40wire(dev->id); | |
3886 | } | |
3887 | ||
15a5551c AC |
3888 | /** |
3889 | * cable_is_40wire - 40/80/SATA decider | |
3890 | * @ap: port to consider | |
3891 | * | |
3892 | * This function encapsulates the policy for speed management | |
3893 | * in one place. At the moment we don't cache the result but | |
3894 | * there is a good case for setting ap->cbl to the result when | |
3895 | * we are called with unknown cables (and figuring out if it | |
3896 | * impacts hotplug at all). | |
3897 | * | |
3898 | * Return 1 if the cable appears to be 40 wire. | |
3899 | */ | |
3900 | ||
3901 | static int cable_is_40wire(struct ata_port *ap) | |
3902 | { | |
3903 | struct ata_link *link; | |
3904 | struct ata_device *dev; | |
3905 | ||
3906 | /* If the controller thinks we are 40 wire, we are */ | |
3907 | if (ap->cbl == ATA_CBL_PATA40) | |
3908 | return 1; | |
3909 | /* If the controller thinks we are 80 wire, we are */ | |
3910 | if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA) | |
3911 | return 0; | |
3912 | /* If the controller doesn't know we scan | |
3913 | ||
3914 | - Note: We look for all 40 wire detects at this point. | |
3915 | Any 80 wire detect is taken to be 80 wire cable | |
3916 | because | |
3917 | - In many setups only the one drive (slave if present) | |
3918 | will give a valid detect | |
3919 | - If you have a non detect capable drive you don't | |
3920 | want it to colour the choice | |
3921 | */ | |
3922 | ata_port_for_each_link(link, ap) { | |
3923 | ata_link_for_each_dev(dev, link) { | |
3924 | if (!ata_is_40wire(dev)) | |
3925 | return 0; | |
3926 | } | |
3927 | } | |
3928 | return 1; | |
3929 | } | |
3930 | ||
a6d5a51c TH |
3931 | /** |
3932 | * ata_dev_xfermask - Compute supported xfermask of the given device | |
a6d5a51c TH |
3933 | * @dev: Device to compute xfermask for |
3934 | * | |
acf356b1 TH |
3935 | * Compute supported xfermask of @dev and store it in |
3936 | * dev->*_mask. This function is responsible for applying all | |
3937 | * known limits including host controller limits, device | |
3938 | * blacklist, etc... | |
a6d5a51c TH |
3939 | * |
3940 | * LOCKING: | |
3941 | * None. | |
a6d5a51c | 3942 | */ |
3373efd8 | 3943 | static void ata_dev_xfermask(struct ata_device *dev) |
1da177e4 | 3944 | { |
9af5c9c9 TH |
3945 | struct ata_link *link = dev->link; |
3946 | struct ata_port *ap = link->ap; | |
cca3974e | 3947 | struct ata_host *host = ap->host; |
a6d5a51c | 3948 | unsigned long xfer_mask; |
1da177e4 | 3949 | |
37deecb5 | 3950 | /* controller modes available */ |
565083e1 TH |
3951 | xfer_mask = ata_pack_xfermask(ap->pio_mask, |
3952 | ap->mwdma_mask, ap->udma_mask); | |
3953 | ||
8343f889 | 3954 | /* drive modes available */ |
37deecb5 TH |
3955 | xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
3956 | dev->mwdma_mask, dev->udma_mask); | |
3957 | xfer_mask &= ata_id_xfermask(dev->id); | |
565083e1 | 3958 | |
b352e57d AC |
3959 | /* |
3960 | * CFA Advanced TrueIDE timings are not allowed on a shared | |
3961 | * cable | |
3962 | */ | |
3963 | if (ata_dev_pair(dev)) { | |
3964 | /* No PIO5 or PIO6 */ | |
3965 | xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); | |
3966 | /* No MWDMA3 or MWDMA 4 */ | |
3967 | xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); | |
3968 | } | |
3969 | ||
37deecb5 TH |
3970 | if (ata_dma_blacklisted(dev)) { |
3971 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); | |
f15a1daf TH |
3972 | ata_dev_printk(dev, KERN_WARNING, |
3973 | "device is on DMA blacklist, disabling DMA\n"); | |
37deecb5 | 3974 | } |
a6d5a51c | 3975 | |
14d66ab7 | 3976 | if ((host->flags & ATA_HOST_SIMPLEX) && |
2dcb407e | 3977 | host->simplex_claimed && host->simplex_claimed != ap) { |
37deecb5 TH |
3978 | xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
3979 | ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " | |
3980 | "other device, disabling DMA\n"); | |
5444a6f4 | 3981 | } |
565083e1 | 3982 | |
e424675f JG |
3983 | if (ap->flags & ATA_FLAG_NO_IORDY) |
3984 | xfer_mask &= ata_pio_mask_no_iordy(dev); | |
3985 | ||
5444a6f4 | 3986 | if (ap->ops->mode_filter) |
a76b62ca | 3987 | xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
5444a6f4 | 3988 | |
8343f889 RH |
3989 | /* Apply cable rule here. Don't apply it early because when |
3990 | * we handle hot plug the cable type can itself change. | |
3991 | * Check this last so that we know if the transfer rate was | |
3992 | * solely limited by the cable. | |
3993 | * Unknown or 80 wire cables reported host side are checked | |
3994 | * drive side as well. Cases where we know a 40wire cable | |
3995 | * is used safely for 80 are not checked here. | |
3996 | */ | |
3997 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) | |
3998 | /* UDMA/44 or higher would be available */ | |
15a5551c | 3999 | if (cable_is_40wire(ap)) { |
2dcb407e | 4000 | ata_dev_printk(dev, KERN_WARNING, |
8343f889 RH |
4001 | "limited to UDMA/33 due to 40-wire cable\n"); |
4002 | xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); | |
4003 | } | |
4004 | ||
565083e1 TH |
4005 | ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
4006 | &dev->mwdma_mask, &dev->udma_mask); | |
1da177e4 LT |
4007 | } |
4008 | ||
1da177e4 LT |
4009 | /** |
4010 | * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command | |
1da177e4 LT |
4011 | * @dev: Device to which command will be sent |
4012 | * | |
780a87f7 JG |
4013 | * Issue SET FEATURES - XFER MODE command to device @dev |
4014 | * on port @ap. | |
4015 | * | |
1da177e4 | 4016 | * LOCKING: |
0cba632b | 4017 | * PCI/etc. bus probe sem. |
83206a29 TH |
4018 | * |
4019 | * RETURNS: | |
4020 | * 0 on success, AC_ERR_* mask otherwise. | |
1da177e4 LT |
4021 | */ |
4022 | ||
3373efd8 | 4023 | static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
1da177e4 | 4024 | { |
a0123703 | 4025 | struct ata_taskfile tf; |
83206a29 | 4026 | unsigned int err_mask; |
1da177e4 LT |
4027 | |
4028 | /* set up set-features taskfile */ | |
4029 | DPRINTK("set features - xfer mode\n"); | |
4030 | ||
464cf177 TH |
4031 | /* Some controllers and ATAPI devices show flaky interrupt |
4032 | * behavior after setting xfer mode. Use polling instead. | |
4033 | */ | |
3373efd8 | 4034 | ata_tf_init(dev, &tf); |
a0123703 TH |
4035 | tf.command = ATA_CMD_SET_FEATURES; |
4036 | tf.feature = SETFEATURES_XFER; | |
464cf177 | 4037 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
a0123703 | 4038 | tf.protocol = ATA_PROT_NODATA; |
b9f8ab2d | 4039 | /* If we are using IORDY we must send the mode setting command */ |
11b7becc JG |
4040 | if (ata_pio_need_iordy(dev)) |
4041 | tf.nsect = dev->xfer_mode; | |
b9f8ab2d AC |
4042 | /* If the device has IORDY and the controller does not - turn it off */ |
4043 | else if (ata_id_has_iordy(dev->id)) | |
11b7becc | 4044 | tf.nsect = 0x01; |
b9f8ab2d AC |
4045 | else /* In the ancient relic department - skip all of this */ |
4046 | return 0; | |
1da177e4 | 4047 | |
2b789108 | 4048 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
9f45cbd3 KCA |
4049 | |
4050 | DPRINTK("EXIT, err_mask=%x\n", err_mask); | |
4051 | return err_mask; | |
4052 | } | |
9f45cbd3 | 4053 | /** |
218f3d30 | 4054 | * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
9f45cbd3 KCA |
4055 | * @dev: Device to which command will be sent |
4056 | * @enable: Whether to enable or disable the feature | |
218f3d30 | 4057 | * @feature: The sector count represents the feature to set |
9f45cbd3 KCA |
4058 | * |
4059 | * Issue SET FEATURES - SATA FEATURES command to device @dev | |
218f3d30 | 4060 | * on port @ap with sector count |
9f45cbd3 KCA |
4061 | * |
4062 | * LOCKING: | |
4063 | * PCI/etc. bus probe sem. | |
4064 | * | |
4065 | * RETURNS: | |
4066 | * 0 on success, AC_ERR_* mask otherwise. | |
4067 | */ | |
218f3d30 JG |
4068 | static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, |
4069 | u8 feature) | |
9f45cbd3 KCA |
4070 | { |
4071 | struct ata_taskfile tf; | |
4072 | unsigned int err_mask; | |
4073 | ||
4074 | /* set up set-features taskfile */ | |
4075 | DPRINTK("set features - SATA features\n"); | |
4076 | ||
4077 | ata_tf_init(dev, &tf); | |
4078 | tf.command = ATA_CMD_SET_FEATURES; | |
4079 | tf.feature = enable; | |
4080 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4081 | tf.protocol = ATA_PROT_NODATA; | |
218f3d30 | 4082 | tf.nsect = feature; |
9f45cbd3 | 4083 | |
2b789108 | 4084 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
1da177e4 | 4085 | |
83206a29 TH |
4086 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4087 | return err_mask; | |
1da177e4 LT |
4088 | } |
4089 | ||
8bf62ece AL |
4090 | /** |
4091 | * ata_dev_init_params - Issue INIT DEV PARAMS command | |
8bf62ece | 4092 | * @dev: Device to which command will be sent |
e2a7f77a RD |
4093 | * @heads: Number of heads (taskfile parameter) |
4094 | * @sectors: Number of sectors (taskfile parameter) | |
8bf62ece AL |
4095 | * |
4096 | * LOCKING: | |
6aff8f1f TH |
4097 | * Kernel thread context (may sleep) |
4098 | * | |
4099 | * RETURNS: | |
4100 | * 0 on success, AC_ERR_* mask otherwise. | |
8bf62ece | 4101 | */ |
3373efd8 TH |
4102 | static unsigned int ata_dev_init_params(struct ata_device *dev, |
4103 | u16 heads, u16 sectors) | |
8bf62ece | 4104 | { |
a0123703 | 4105 | struct ata_taskfile tf; |
6aff8f1f | 4106 | unsigned int err_mask; |
8bf62ece AL |
4107 | |
4108 | /* Number of sectors per track 1-255. Number of heads 1-16 */ | |
4109 | if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) | |
00b6f5e9 | 4110 | return AC_ERR_INVALID; |
8bf62ece AL |
4111 | |
4112 | /* set up init dev params taskfile */ | |
4113 | DPRINTK("init dev params \n"); | |
4114 | ||
3373efd8 | 4115 | ata_tf_init(dev, &tf); |
a0123703 TH |
4116 | tf.command = ATA_CMD_INIT_DEV_PARAMS; |
4117 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; | |
4118 | tf.protocol = ATA_PROT_NODATA; | |
4119 | tf.nsect = sectors; | |
4120 | tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ | |
8bf62ece | 4121 | |
2b789108 | 4122 | err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
18b2466c AC |
4123 | /* A clean abort indicates an original or just out of spec drive |
4124 | and we should continue as we issue the setup based on the | |
4125 | drive reported working geometry */ | |
4126 | if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) | |
4127 | err_mask = 0; | |
8bf62ece | 4128 | |
6aff8f1f TH |
4129 | DPRINTK("EXIT, err_mask=%x\n", err_mask); |
4130 | return err_mask; | |
8bf62ece AL |
4131 | } |
4132 | ||
1da177e4 | 4133 | /** |
0cba632b JG |
4134 | * ata_sg_clean - Unmap DMA memory associated with command |
4135 | * @qc: Command containing DMA memory to be released | |
4136 | * | |
4137 | * Unmap all mapped DMA memory associated with this command. | |
1da177e4 LT |
4138 | * |
4139 | * LOCKING: | |
cca3974e | 4140 | * spin_lock_irqsave(host lock) |
1da177e4 | 4141 | */ |
70e6ad0c | 4142 | void ata_sg_clean(struct ata_queued_cmd *qc) |
1da177e4 LT |
4143 | { |
4144 | struct ata_port *ap = qc->ap; | |
ff2aeb1e | 4145 | struct scatterlist *sg = qc->sg; |
1da177e4 LT |
4146 | int dir = qc->dma_dir; |
4147 | ||
a4631474 | 4148 | WARN_ON(sg == NULL); |
1da177e4 | 4149 | |
dde20207 | 4150 | VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
1da177e4 | 4151 | |
dde20207 JB |
4152 | if (qc->n_elem) |
4153 | dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); | |
1da177e4 LT |
4154 | |
4155 | qc->flags &= ~ATA_QCFLAG_DMAMAP; | |
ff2aeb1e | 4156 | qc->sg = NULL; |
1da177e4 LT |
4157 | } |
4158 | ||
1da177e4 LT |
4159 | /** |
4160 | * ata_check_atapi_dma - Check whether ATAPI DMA can be supported | |
4161 | * @qc: Metadata associated with taskfile to check | |
4162 | * | |
780a87f7 JG |
4163 | * Allow low-level driver to filter ATA PACKET commands, returning |
4164 | * a status indicating whether or not it is OK to use DMA for the | |
4165 | * supplied PACKET command. | |
4166 | * | |
1da177e4 | 4167 | * LOCKING: |
624d5c51 TH |
4168 | * spin_lock_irqsave(host lock) |
4169 | * | |
4170 | * RETURNS: 0 when ATAPI DMA can be used | |
4171 | * nonzero otherwise | |
4172 | */ | |
4173 | int ata_check_atapi_dma(struct ata_queued_cmd *qc) | |
4174 | { | |
4175 | struct ata_port *ap = qc->ap; | |
71601958 | 4176 | |
624d5c51 TH |
4177 | /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a |
4178 | * few ATAPI devices choke on such DMA requests. | |
4179 | */ | |
4180 | if (unlikely(qc->nbytes & 15)) | |
4181 | return 1; | |
e2cec771 | 4182 | |
624d5c51 TH |
4183 | if (ap->ops->check_atapi_dma) |
4184 | return ap->ops->check_atapi_dma(qc); | |
e2cec771 | 4185 | |
624d5c51 TH |
4186 | return 0; |
4187 | } | |
1da177e4 | 4188 | |
624d5c51 TH |
4189 | /** |
4190 | * ata_std_qc_defer - Check whether a qc needs to be deferred | |
4191 | * @qc: ATA command in question | |
4192 | * | |
4193 | * Non-NCQ commands cannot run with any other command, NCQ or | |
4194 | * not. As upper layer only knows the queue depth, we are | |
4195 | * responsible for maintaining exclusion. This function checks | |
4196 | * whether a new command @qc can be issued. | |
4197 | * | |
4198 | * LOCKING: | |
4199 | * spin_lock_irqsave(host lock) | |
4200 | * | |
4201 | * RETURNS: | |
4202 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
4203 | */ | |
4204 | int ata_std_qc_defer(struct ata_queued_cmd *qc) | |
4205 | { | |
4206 | struct ata_link *link = qc->dev->link; | |
e2cec771 | 4207 | |
624d5c51 TH |
4208 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
4209 | if (!ata_tag_valid(link->active_tag)) | |
4210 | return 0; | |
4211 | } else { | |
4212 | if (!ata_tag_valid(link->active_tag) && !link->sactive) | |
4213 | return 0; | |
4214 | } | |
e2cec771 | 4215 | |
624d5c51 TH |
4216 | return ATA_DEFER_LINK; |
4217 | } | |
6912ccd5 | 4218 | |
624d5c51 | 4219 | void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
1da177e4 | 4220 | |
624d5c51 TH |
4221 | /** |
4222 | * ata_sg_init - Associate command with scatter-gather table. | |
4223 | * @qc: Command to be associated | |
4224 | * @sg: Scatter-gather table. | |
4225 | * @n_elem: Number of elements in s/g table. | |
4226 | * | |
4227 | * Initialize the data-related elements of queued_cmd @qc | |
4228 | * to point to a scatter-gather table @sg, containing @n_elem | |
4229 | * elements. | |
4230 | * | |
4231 | * LOCKING: | |
4232 | * spin_lock_irqsave(host lock) | |
4233 | */ | |
4234 | void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
4235 | unsigned int n_elem) | |
4236 | { | |
4237 | qc->sg = sg; | |
4238 | qc->n_elem = n_elem; | |
4239 | qc->cursg = qc->sg; | |
4240 | } | |
bb5cb290 | 4241 | |
624d5c51 TH |
4242 | /** |
4243 | * ata_sg_setup - DMA-map the scatter-gather table associated with a command. | |
4244 | * @qc: Command with scatter-gather table to be mapped. | |
4245 | * | |
4246 | * DMA-map the scatter-gather table associated with queued_cmd @qc. | |
4247 | * | |
4248 | * LOCKING: | |
4249 | * spin_lock_irqsave(host lock) | |
4250 | * | |
4251 | * RETURNS: | |
4252 | * Zero on success, negative on error. | |
4253 | * | |
4254 | */ | |
4255 | static int ata_sg_setup(struct ata_queued_cmd *qc) | |
4256 | { | |
4257 | struct ata_port *ap = qc->ap; | |
4258 | unsigned int n_elem; | |
1da177e4 | 4259 | |
624d5c51 | 4260 | VPRINTK("ENTER, ata%u\n", ap->print_id); |
e2cec771 | 4261 | |
624d5c51 TH |
4262 | n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
4263 | if (n_elem < 1) | |
4264 | return -1; | |
bb5cb290 | 4265 | |
624d5c51 | 4266 | DPRINTK("%d sg elements mapped\n", n_elem); |
bb5cb290 | 4267 | |
624d5c51 TH |
4268 | qc->n_elem = n_elem; |
4269 | qc->flags |= ATA_QCFLAG_DMAMAP; | |
1da177e4 | 4270 | |
624d5c51 | 4271 | return 0; |
1da177e4 LT |
4272 | } |
4273 | ||
624d5c51 TH |
4274 | /** |
4275 | * swap_buf_le16 - swap halves of 16-bit words in place | |
4276 | * @buf: Buffer to swap | |
4277 | * @buf_words: Number of 16-bit words in buffer. | |
4278 | * | |
4279 | * Swap halves of 16-bit words if needed to convert from | |
4280 | * little-endian byte order to native cpu byte order, or | |
4281 | * vice-versa. | |
4282 | * | |
4283 | * LOCKING: | |
4284 | * Inherited from caller. | |
4285 | */ | |
4286 | void swap_buf_le16(u16 *buf, unsigned int buf_words) | |
8061f5f0 | 4287 | { |
624d5c51 TH |
4288 | #ifdef __BIG_ENDIAN |
4289 | unsigned int i; | |
8061f5f0 | 4290 | |
624d5c51 TH |
4291 | for (i = 0; i < buf_words; i++) |
4292 | buf[i] = le16_to_cpu(buf[i]); | |
4293 | #endif /* __BIG_ENDIAN */ | |
8061f5f0 TH |
4294 | } |
4295 | ||
1da177e4 LT |
4296 | /** |
4297 | * ata_qc_new - Request an available ATA command, for queueing | |
4298 | * @ap: Port associated with device @dev | |
4299 | * @dev: Device from whom we request an available command structure | |
4300 | * | |
4301 | * LOCKING: | |
0cba632b | 4302 | * None. |
1da177e4 LT |
4303 | */ |
4304 | ||
4305 | static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) | |
4306 | { | |
4307 | struct ata_queued_cmd *qc = NULL; | |
4308 | unsigned int i; | |
4309 | ||
e3180499 | 4310 | /* no command while frozen */ |
b51e9e5d | 4311 | if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
e3180499 TH |
4312 | return NULL; |
4313 | ||
2ab7db1f TH |
4314 | /* the last tag is reserved for internal command. */ |
4315 | for (i = 0; i < ATA_MAX_QUEUE - 1; i++) | |
6cec4a39 | 4316 | if (!test_and_set_bit(i, &ap->qc_allocated)) { |
f69499f4 | 4317 | qc = __ata_qc_from_tag(ap, i); |
1da177e4 LT |
4318 | break; |
4319 | } | |
4320 | ||
4321 | if (qc) | |
4322 | qc->tag = i; | |
4323 | ||
4324 | return qc; | |
4325 | } | |
4326 | ||
4327 | /** | |
4328 | * ata_qc_new_init - Request an available ATA command, and initialize it | |
1da177e4 LT |
4329 | * @dev: Device from whom we request an available command structure |
4330 | * | |
4331 | * LOCKING: | |
0cba632b | 4332 | * None. |
1da177e4 LT |
4333 | */ |
4334 | ||
3373efd8 | 4335 | struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
1da177e4 | 4336 | { |
9af5c9c9 | 4337 | struct ata_port *ap = dev->link->ap; |
1da177e4 LT |
4338 | struct ata_queued_cmd *qc; |
4339 | ||
4340 | qc = ata_qc_new(ap); | |
4341 | if (qc) { | |
1da177e4 LT |
4342 | qc->scsicmd = NULL; |
4343 | qc->ap = ap; | |
4344 | qc->dev = dev; | |
1da177e4 | 4345 | |
2c13b7ce | 4346 | ata_qc_reinit(qc); |
1da177e4 LT |
4347 | } |
4348 | ||
4349 | return qc; | |
4350 | } | |
4351 | ||
1da177e4 LT |
4352 | /** |
4353 | * ata_qc_free - free unused ata_queued_cmd | |
4354 | * @qc: Command to complete | |
4355 | * | |
4356 | * Designed to free unused ata_queued_cmd object | |
4357 | * in case something prevents using it. | |
4358 | * | |
4359 | * LOCKING: | |
cca3974e | 4360 | * spin_lock_irqsave(host lock) |
1da177e4 LT |
4361 | */ |
4362 | void ata_qc_free(struct ata_queued_cmd *qc) | |
4363 | { | |
4ba946e9 TH |
4364 | struct ata_port *ap = qc->ap; |
4365 | unsigned int tag; | |
4366 | ||
a4631474 | 4367 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
1da177e4 | 4368 | |
4ba946e9 TH |
4369 | qc->flags = 0; |
4370 | tag = qc->tag; | |
4371 | if (likely(ata_tag_valid(tag))) { | |
4ba946e9 | 4372 | qc->tag = ATA_TAG_POISON; |
6cec4a39 | 4373 | clear_bit(tag, &ap->qc_allocated); |
4ba946e9 | 4374 | } |
1da177e4 LT |
4375 | } |
4376 | ||
76014427 | 4377 | void __ata_qc_complete(struct ata_queued_cmd *qc) |
1da177e4 | 4378 | { |
dedaf2b0 | 4379 | struct ata_port *ap = qc->ap; |
9af5c9c9 | 4380 | struct ata_link *link = qc->dev->link; |
dedaf2b0 | 4381 | |
a4631474 TH |
4382 | WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
4383 | WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); | |
1da177e4 LT |
4384 | |
4385 | if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) | |
4386 | ata_sg_clean(qc); | |
4387 | ||
7401abf2 | 4388 | /* command should be marked inactive atomically with qc completion */ |
da917d69 | 4389 | if (qc->tf.protocol == ATA_PROT_NCQ) { |
9af5c9c9 | 4390 | link->sactive &= ~(1 << qc->tag); |
da917d69 TH |
4391 | if (!link->sactive) |
4392 | ap->nr_active_links--; | |
4393 | } else { | |
9af5c9c9 | 4394 | link->active_tag = ATA_TAG_POISON; |
da917d69 TH |
4395 | ap->nr_active_links--; |
4396 | } | |
4397 | ||
4398 | /* clear exclusive status */ | |
4399 | if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && | |
4400 | ap->excl_link == link)) | |
4401 | ap->excl_link = NULL; | |
7401abf2 | 4402 | |
3f3791d3 AL |
4403 | /* atapi: mark qc as inactive to prevent the interrupt handler |
4404 | * from completing the command twice later, before the error handler | |
4405 | * is called. (when rc != 0 and atapi request sense is needed) | |
4406 | */ | |
4407 | qc->flags &= ~ATA_QCFLAG_ACTIVE; | |
dedaf2b0 | 4408 | ap->qc_active &= ~(1 << qc->tag); |
3f3791d3 | 4409 | |
1da177e4 | 4410 | /* call completion callback */ |
77853bf2 | 4411 | qc->complete_fn(qc); |
1da177e4 LT |
4412 | } |
4413 | ||
39599a53 TH |
4414 | static void fill_result_tf(struct ata_queued_cmd *qc) |
4415 | { | |
4416 | struct ata_port *ap = qc->ap; | |
4417 | ||
39599a53 | 4418 | qc->result_tf.flags = qc->tf.flags; |
4742d54f | 4419 | ap->ops->tf_read(ap, &qc->result_tf); |
39599a53 TH |
4420 | } |
4421 | ||
00115e0f TH |
4422 | static void ata_verify_xfer(struct ata_queued_cmd *qc) |
4423 | { | |
4424 | struct ata_device *dev = qc->dev; | |
4425 | ||
4426 | if (ata_tag_internal(qc->tag)) | |
4427 | return; | |
4428 | ||
4429 | if (ata_is_nodata(qc->tf.protocol)) | |
4430 | return; | |
4431 | ||
4432 | if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) | |
4433 | return; | |
4434 | ||
4435 | dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; | |
4436 | } | |
4437 | ||
f686bcb8 TH |
4438 | /** |
4439 | * ata_qc_complete - Complete an active ATA command | |
4440 | * @qc: Command to complete | |
4441 | * @err_mask: ATA Status register contents | |
4442 | * | |
4443 | * Indicate to the mid and upper layers that an ATA | |
4444 | * command has completed, with either an ok or not-ok status. | |
4445 | * | |
4446 | * LOCKING: | |
cca3974e | 4447 | * spin_lock_irqsave(host lock) |
f686bcb8 TH |
4448 | */ |
4449 | void ata_qc_complete(struct ata_queued_cmd *qc) | |
4450 | { | |
4451 | struct ata_port *ap = qc->ap; | |
4452 | ||
4453 | /* XXX: New EH and old EH use different mechanisms to | |
4454 | * synchronize EH with regular execution path. | |
4455 | * | |
4456 | * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. | |
4457 | * Normal execution path is responsible for not accessing a | |
4458 | * failed qc. libata core enforces the rule by returning NULL | |
4459 | * from ata_qc_from_tag() for failed qcs. | |
4460 | * | |
4461 | * Old EH depends on ata_qc_complete() nullifying completion | |
4462 | * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does | |
4463 | * not synchronize with interrupt handler. Only PIO task is | |
4464 | * taken care of. | |
4465 | */ | |
4466 | if (ap->ops->error_handler) { | |
4dbfa39b TH |
4467 | struct ata_device *dev = qc->dev; |
4468 | struct ata_eh_info *ehi = &dev->link->eh_info; | |
4469 | ||
b51e9e5d | 4470 | WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
f686bcb8 TH |
4471 | |
4472 | if (unlikely(qc->err_mask)) | |
4473 | qc->flags |= ATA_QCFLAG_FAILED; | |
4474 | ||
4475 | if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { | |
4476 | if (!ata_tag_internal(qc->tag)) { | |
4477 | /* always fill result TF for failed qc */ | |
39599a53 | 4478 | fill_result_tf(qc); |
f686bcb8 TH |
4479 | ata_qc_schedule_eh(qc); |
4480 | return; | |
4481 | } | |
4482 | } | |
4483 | ||
4484 | /* read result TF if requested */ | |
4485 | if (qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 4486 | fill_result_tf(qc); |
f686bcb8 | 4487 | |
4dbfa39b TH |
4488 | /* Some commands need post-processing after successful |
4489 | * completion. | |
4490 | */ | |
4491 | switch (qc->tf.command) { | |
4492 | case ATA_CMD_SET_FEATURES: | |
4493 | if (qc->tf.feature != SETFEATURES_WC_ON && | |
4494 | qc->tf.feature != SETFEATURES_WC_OFF) | |
4495 | break; | |
4496 | /* fall through */ | |
4497 | case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ | |
4498 | case ATA_CMD_SET_MULTI: /* multi_count changed */ | |
4499 | /* revalidate device */ | |
4500 | ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; | |
4501 | ata_port_schedule_eh(ap); | |
4502 | break; | |
054a5fba TH |
4503 | |
4504 | case ATA_CMD_SLEEP: | |
4505 | dev->flags |= ATA_DFLAG_SLEEPING; | |
4506 | break; | |
4dbfa39b TH |
4507 | } |
4508 | ||
00115e0f TH |
4509 | if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
4510 | ata_verify_xfer(qc); | |
4511 | ||
f686bcb8 TH |
4512 | __ata_qc_complete(qc); |
4513 | } else { | |
4514 | if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) | |
4515 | return; | |
4516 | ||
4517 | /* read result TF if failed or requested */ | |
4518 | if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) | |
39599a53 | 4519 | fill_result_tf(qc); |
f686bcb8 TH |
4520 | |
4521 | __ata_qc_complete(qc); | |
4522 | } | |
4523 | } | |
4524 | ||
dedaf2b0 TH |
4525 | /** |
4526 | * ata_qc_complete_multiple - Complete multiple qcs successfully | |
4527 | * @ap: port in question | |
4528 | * @qc_active: new qc_active mask | |
4529 | * @finish_qc: LLDD callback invoked before completing a qc | |
4530 | * | |
4531 | * Complete in-flight commands. This functions is meant to be | |
4532 | * called from low-level driver's interrupt routine to complete | |
4533 | * requests normally. ap->qc_active and @qc_active is compared | |
4534 | * and commands are completed accordingly. | |
4535 | * | |
4536 | * LOCKING: | |
cca3974e | 4537 | * spin_lock_irqsave(host lock) |
dedaf2b0 TH |
4538 | * |
4539 | * RETURNS: | |
4540 | * Number of completed commands on success, -errno otherwise. | |
4541 | */ | |
4542 | int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, | |
4543 | void (*finish_qc)(struct ata_queued_cmd *)) | |
4544 | { | |
4545 | int nr_done = 0; | |
4546 | u32 done_mask; | |
4547 | int i; | |
4548 | ||
4549 | done_mask = ap->qc_active ^ qc_active; | |
4550 | ||
4551 | if (unlikely(done_mask & qc_active)) { | |
4552 | ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " | |
4553 | "(%08x->%08x)\n", ap->qc_active, qc_active); | |
4554 | return -EINVAL; | |
4555 | } | |
4556 | ||
4557 | for (i = 0; i < ATA_MAX_QUEUE; i++) { | |
4558 | struct ata_queued_cmd *qc; | |
4559 | ||
4560 | if (!(done_mask & (1 << i))) | |
4561 | continue; | |
4562 | ||
4563 | if ((qc = ata_qc_from_tag(ap, i))) { | |
4564 | if (finish_qc) | |
4565 | finish_qc(qc); | |
4566 | ata_qc_complete(qc); | |
4567 | nr_done++; | |
4568 | } | |
4569 | } | |
4570 | ||
4571 | return nr_done; | |
4572 | } | |
4573 | ||
1da177e4 LT |
4574 | /** |
4575 | * ata_qc_issue - issue taskfile to device | |
4576 | * @qc: command to issue to device | |
4577 | * | |
4578 | * Prepare an ATA command to submission to device. | |
4579 | * This includes mapping the data into a DMA-able | |
4580 | * area, filling in the S/G table, and finally | |
4581 | * writing the taskfile to hardware, starting the command. | |
4582 | * | |
4583 | * LOCKING: | |
cca3974e | 4584 | * spin_lock_irqsave(host lock) |
1da177e4 | 4585 | */ |
8e0e694a | 4586 | void ata_qc_issue(struct ata_queued_cmd *qc) |
1da177e4 LT |
4587 | { |
4588 | struct ata_port *ap = qc->ap; | |
9af5c9c9 | 4589 | struct ata_link *link = qc->dev->link; |
405e66b3 | 4590 | u8 prot = qc->tf.protocol; |
1da177e4 | 4591 | |
dedaf2b0 TH |
4592 | /* Make sure only one non-NCQ command is outstanding. The |
4593 | * check is skipped for old EH because it reuses active qc to | |
4594 | * request ATAPI sense. | |
4595 | */ | |
9af5c9c9 | 4596 | WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
dedaf2b0 | 4597 | |
1973a023 | 4598 | if (ata_is_ncq(prot)) { |
9af5c9c9 | 4599 | WARN_ON(link->sactive & (1 << qc->tag)); |
da917d69 TH |
4600 | |
4601 | if (!link->sactive) | |
4602 | ap->nr_active_links++; | |
9af5c9c9 | 4603 | link->sactive |= 1 << qc->tag; |
dedaf2b0 | 4604 | } else { |
9af5c9c9 | 4605 | WARN_ON(link->sactive); |
da917d69 TH |
4606 | |
4607 | ap->nr_active_links++; | |
9af5c9c9 | 4608 | link->active_tag = qc->tag; |
dedaf2b0 TH |
4609 | } |
4610 | ||
e4a70e76 | 4611 | qc->flags |= ATA_QCFLAG_ACTIVE; |
dedaf2b0 | 4612 | ap->qc_active |= 1 << qc->tag; |
e4a70e76 | 4613 | |
f92a2636 TH |
4614 | /* We guarantee to LLDs that they will have at least one |
4615 | * non-zero sg if the command is a data command. | |
4616 | */ | |
ff2aeb1e | 4617 | BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); |
f92a2636 | 4618 | |
405e66b3 | 4619 | if (ata_is_dma(prot) || (ata_is_pio(prot) && |
f92a2636 | 4620 | (ap->flags & ATA_FLAG_PIO_DMA))) |
001102d7 TH |
4621 | if (ata_sg_setup(qc)) |
4622 | goto sg_err; | |
1da177e4 | 4623 | |
cf480626 | 4624 | /* if device is sleeping, schedule reset and abort the link */ |
054a5fba | 4625 | if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { |
cf480626 | 4626 | link->eh_info.action |= ATA_EH_RESET; |
054a5fba TH |
4627 | ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); |
4628 | ata_link_abort(link); | |
4629 | return; | |
4630 | } | |
4631 | ||
1da177e4 LT |
4632 | ap->ops->qc_prep(qc); |
4633 | ||
8e0e694a TH |
4634 | qc->err_mask |= ap->ops->qc_issue(qc); |
4635 | if (unlikely(qc->err_mask)) | |
4636 | goto err; | |
4637 | return; | |
1da177e4 | 4638 | |
8e436af9 | 4639 | sg_err: |
8e0e694a TH |
4640 | qc->err_mask |= AC_ERR_SYSTEM; |
4641 | err: | |
4642 | ata_qc_complete(qc); | |
1da177e4 LT |
4643 | } |
4644 | ||
34bf2170 TH |
4645 | /** |
4646 | * sata_scr_valid - test whether SCRs are accessible | |
936fd732 | 4647 | * @link: ATA link to test SCR accessibility for |
34bf2170 | 4648 | * |
936fd732 | 4649 | * Test whether SCRs are accessible for @link. |
34bf2170 TH |
4650 | * |
4651 | * LOCKING: | |
4652 | * None. | |
4653 | * | |
4654 | * RETURNS: | |
4655 | * 1 if SCRs are accessible, 0 otherwise. | |
4656 | */ | |
936fd732 | 4657 | int sata_scr_valid(struct ata_link *link) |
34bf2170 | 4658 | { |
936fd732 TH |
4659 | struct ata_port *ap = link->ap; |
4660 | ||
a16abc0b | 4661 | return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
34bf2170 TH |
4662 | } |
4663 | ||
4664 | /** | |
4665 | * sata_scr_read - read SCR register of the specified port | |
936fd732 | 4666 | * @link: ATA link to read SCR for |
34bf2170 TH |
4667 | * @reg: SCR to read |
4668 | * @val: Place to store read value | |
4669 | * | |
936fd732 | 4670 | * Read SCR register @reg of @link into *@val. This function is |
633273a3 TH |
4671 | * guaranteed to succeed if @link is ap->link, the cable type of |
4672 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
4673 | * |
4674 | * LOCKING: | |
633273a3 | 4675 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
4676 | * |
4677 | * RETURNS: | |
4678 | * 0 on success, negative errno on failure. | |
4679 | */ | |
936fd732 | 4680 | int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
34bf2170 | 4681 | { |
633273a3 TH |
4682 | if (ata_is_host_link(link)) { |
4683 | struct ata_port *ap = link->ap; | |
936fd732 | 4684 | |
633273a3 TH |
4685 | if (sata_scr_valid(link)) |
4686 | return ap->ops->scr_read(ap, reg, val); | |
4687 | return -EOPNOTSUPP; | |
4688 | } | |
4689 | ||
4690 | return sata_pmp_scr_read(link, reg, val); | |
34bf2170 TH |
4691 | } |
4692 | ||
4693 | /** | |
4694 | * sata_scr_write - write SCR register of the specified port | |
936fd732 | 4695 | * @link: ATA link to write SCR for |
34bf2170 TH |
4696 | * @reg: SCR to write |
4697 | * @val: value to write | |
4698 | * | |
936fd732 | 4699 | * Write @val to SCR register @reg of @link. This function is |
633273a3 TH |
4700 | * guaranteed to succeed if @link is ap->link, the cable type of |
4701 | * the port is SATA and the port implements ->scr_read. | |
34bf2170 TH |
4702 | * |
4703 | * LOCKING: | |
633273a3 | 4704 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
4705 | * |
4706 | * RETURNS: | |
4707 | * 0 on success, negative errno on failure. | |
4708 | */ | |
936fd732 | 4709 | int sata_scr_write(struct ata_link *link, int reg, u32 val) |
34bf2170 | 4710 | { |
633273a3 TH |
4711 | if (ata_is_host_link(link)) { |
4712 | struct ata_port *ap = link->ap; | |
4713 | ||
4714 | if (sata_scr_valid(link)) | |
4715 | return ap->ops->scr_write(ap, reg, val); | |
4716 | return -EOPNOTSUPP; | |
4717 | } | |
936fd732 | 4718 | |
633273a3 | 4719 | return sata_pmp_scr_write(link, reg, val); |
34bf2170 TH |
4720 | } |
4721 | ||
4722 | /** | |
4723 | * sata_scr_write_flush - write SCR register of the specified port and flush | |
936fd732 | 4724 | * @link: ATA link to write SCR for |
34bf2170 TH |
4725 | * @reg: SCR to write |
4726 | * @val: value to write | |
4727 | * | |
4728 | * This function is identical to sata_scr_write() except that this | |
4729 | * function performs flush after writing to the register. | |
4730 | * | |
4731 | * LOCKING: | |
633273a3 | 4732 | * None if @link is ap->link. Kernel thread context otherwise. |
34bf2170 TH |
4733 | * |
4734 | * RETURNS: | |
4735 | * 0 on success, negative errno on failure. | |
4736 | */ | |
936fd732 | 4737 | int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
34bf2170 | 4738 | { |
633273a3 TH |
4739 | if (ata_is_host_link(link)) { |
4740 | struct ata_port *ap = link->ap; | |
4741 | int rc; | |
da3dbb17 | 4742 | |
633273a3 TH |
4743 | if (sata_scr_valid(link)) { |
4744 | rc = ap->ops->scr_write(ap, reg, val); | |
4745 | if (rc == 0) | |
4746 | rc = ap->ops->scr_read(ap, reg, &val); | |
4747 | return rc; | |
4748 | } | |
4749 | return -EOPNOTSUPP; | |
34bf2170 | 4750 | } |
633273a3 TH |
4751 | |
4752 | return sata_pmp_scr_write(link, reg, val); | |
34bf2170 TH |
4753 | } |
4754 | ||
4755 | /** | |
936fd732 TH |
4756 | * ata_link_online - test whether the given link is online |
4757 | * @link: ATA link to test | |
34bf2170 | 4758 | * |
936fd732 TH |
4759 | * Test whether @link is online. Note that this function returns |
4760 | * 0 if online status of @link cannot be obtained, so | |
4761 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
4762 | * |
4763 | * LOCKING: | |
4764 | * None. | |
4765 | * | |
4766 | * RETURNS: | |
4767 | * 1 if the port online status is available and online. | |
4768 | */ | |
936fd732 | 4769 | int ata_link_online(struct ata_link *link) |
34bf2170 TH |
4770 | { |
4771 | u32 sstatus; | |
4772 | ||
936fd732 TH |
4773 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
4774 | (sstatus & 0xf) == 0x3) | |
34bf2170 TH |
4775 | return 1; |
4776 | return 0; | |
4777 | } | |
4778 | ||
4779 | /** | |
936fd732 TH |
4780 | * ata_link_offline - test whether the given link is offline |
4781 | * @link: ATA link to test | |
34bf2170 | 4782 | * |
936fd732 TH |
4783 | * Test whether @link is offline. Note that this function |
4784 | * returns 0 if offline status of @link cannot be obtained, so | |
4785 | * ata_link_online(link) != !ata_link_offline(link). | |
34bf2170 TH |
4786 | * |
4787 | * LOCKING: | |
4788 | * None. | |
4789 | * | |
4790 | * RETURNS: | |
4791 | * 1 if the port offline status is available and offline. | |
4792 | */ | |
936fd732 | 4793 | int ata_link_offline(struct ata_link *link) |
34bf2170 TH |
4794 | { |
4795 | u32 sstatus; | |
4796 | ||
936fd732 TH |
4797 | if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
4798 | (sstatus & 0xf) != 0x3) | |
34bf2170 TH |
4799 | return 1; |
4800 | return 0; | |
4801 | } | |
0baab86b | 4802 | |
6ffa01d8 | 4803 | #ifdef CONFIG_PM |
cca3974e JG |
4804 | static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
4805 | unsigned int action, unsigned int ehi_flags, | |
4806 | int wait) | |
500530f6 TH |
4807 | { |
4808 | unsigned long flags; | |
4809 | int i, rc; | |
4810 | ||
cca3974e JG |
4811 | for (i = 0; i < host->n_ports; i++) { |
4812 | struct ata_port *ap = host->ports[i]; | |
e3667ebf | 4813 | struct ata_link *link; |
500530f6 TH |
4814 | |
4815 | /* Previous resume operation might still be in | |
4816 | * progress. Wait for PM_PENDING to clear. | |
4817 | */ | |
4818 | if (ap->pflags & ATA_PFLAG_PM_PENDING) { | |
4819 | ata_port_wait_eh(ap); | |
4820 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
4821 | } | |
4822 | ||
4823 | /* request PM ops to EH */ | |
4824 | spin_lock_irqsave(ap->lock, flags); | |
4825 | ||
4826 | ap->pm_mesg = mesg; | |
4827 | if (wait) { | |
4828 | rc = 0; | |
4829 | ap->pm_result = &rc; | |
4830 | } | |
4831 | ||
4832 | ap->pflags |= ATA_PFLAG_PM_PENDING; | |
e3667ebf TH |
4833 | __ata_port_for_each_link(link, ap) { |
4834 | link->eh_info.action |= action; | |
4835 | link->eh_info.flags |= ehi_flags; | |
4836 | } | |
500530f6 TH |
4837 | |
4838 | ata_port_schedule_eh(ap); | |
4839 | ||
4840 | spin_unlock_irqrestore(ap->lock, flags); | |
4841 | ||
4842 | /* wait and check result */ | |
4843 | if (wait) { | |
4844 | ata_port_wait_eh(ap); | |
4845 | WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); | |
4846 | if (rc) | |
4847 | return rc; | |
4848 | } | |
4849 | } | |
4850 | ||
4851 | return 0; | |
4852 | } | |
4853 | ||
4854 | /** | |
cca3974e JG |
4855 | * ata_host_suspend - suspend host |
4856 | * @host: host to suspend | |
500530f6 TH |
4857 | * @mesg: PM message |
4858 | * | |
cca3974e | 4859 | * Suspend @host. Actual operation is performed by EH. This |
500530f6 TH |
4860 | * function requests EH to perform PM operations and waits for EH |
4861 | * to finish. | |
4862 | * | |
4863 | * LOCKING: | |
4864 | * Kernel thread context (may sleep). | |
4865 | * | |
4866 | * RETURNS: | |
4867 | * 0 on success, -errno on failure. | |
4868 | */ | |
cca3974e | 4869 | int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
500530f6 | 4870 | { |
9666f400 | 4871 | int rc; |
500530f6 | 4872 | |
ca77329f KCA |
4873 | /* |
4874 | * disable link pm on all ports before requesting | |
4875 | * any pm activity | |
4876 | */ | |
4877 | ata_lpm_enable(host); | |
4878 | ||
cca3974e | 4879 | rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
72ad6ec4 JG |
4880 | if (rc == 0) |
4881 | host->dev->power.power_state = mesg; | |
500530f6 TH |
4882 | return rc; |
4883 | } | |
4884 | ||
4885 | /** | |
cca3974e JG |
4886 | * ata_host_resume - resume host |
4887 | * @host: host to resume | |
500530f6 | 4888 | * |
cca3974e | 4889 | * Resume @host. Actual operation is performed by EH. This |
500530f6 TH |
4890 | * function requests EH to perform PM operations and returns. |
4891 | * Note that all resume operations are performed parallely. | |
4892 | * | |
4893 | * LOCKING: | |
4894 | * Kernel thread context (may sleep). | |
4895 | */ | |
cca3974e | 4896 | void ata_host_resume(struct ata_host *host) |
500530f6 | 4897 | { |
cf480626 | 4898 | ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET, |
cca3974e | 4899 | ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); |
72ad6ec4 | 4900 | host->dev->power.power_state = PMSG_ON; |
ca77329f KCA |
4901 | |
4902 | /* reenable link pm */ | |
4903 | ata_lpm_disable(host); | |
500530f6 | 4904 | } |
6ffa01d8 | 4905 | #endif |
500530f6 | 4906 | |
c893a3ae RD |
4907 | /** |
4908 | * ata_port_start - Set port up for dma. | |
4909 | * @ap: Port to initialize | |
4910 | * | |
4911 | * Called just after data structures for each port are | |
4912 | * initialized. Allocates space for PRD table. | |
4913 | * | |
4914 | * May be used as the port_start() entry in ata_port_operations. | |
4915 | * | |
4916 | * LOCKING: | |
4917 | * Inherited from caller. | |
4918 | */ | |
f0d36efd | 4919 | int ata_port_start(struct ata_port *ap) |
1da177e4 | 4920 | { |
2f1f610b | 4921 | struct device *dev = ap->dev; |
1da177e4 | 4922 | |
f0d36efd TH |
4923 | ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
4924 | GFP_KERNEL); | |
1da177e4 LT |
4925 | if (!ap->prd) |
4926 | return -ENOMEM; | |
4927 | ||
1da177e4 LT |
4928 | return 0; |
4929 | } | |
4930 | ||
3ef3b43d TH |
4931 | /** |
4932 | * ata_dev_init - Initialize an ata_device structure | |
4933 | * @dev: Device structure to initialize | |
4934 | * | |
4935 | * Initialize @dev in preparation for probing. | |
4936 | * | |
4937 | * LOCKING: | |
4938 | * Inherited from caller. | |
4939 | */ | |
4940 | void ata_dev_init(struct ata_device *dev) | |
4941 | { | |
9af5c9c9 TH |
4942 | struct ata_link *link = dev->link; |
4943 | struct ata_port *ap = link->ap; | |
72fa4b74 TH |
4944 | unsigned long flags; |
4945 | ||
5a04bf4b | 4946 | /* SATA spd limit is bound to the first device */ |
9af5c9c9 TH |
4947 | link->sata_spd_limit = link->hw_sata_spd_limit; |
4948 | link->sata_spd = 0; | |
5a04bf4b | 4949 | |
72fa4b74 TH |
4950 | /* High bits of dev->flags are used to record warm plug |
4951 | * requests which occur asynchronously. Synchronize using | |
cca3974e | 4952 | * host lock. |
72fa4b74 | 4953 | */ |
ba6a1308 | 4954 | spin_lock_irqsave(ap->lock, flags); |
72fa4b74 | 4955 | dev->flags &= ~ATA_DFLAG_INIT_MASK; |
3dcc323f | 4956 | dev->horkage = 0; |
ba6a1308 | 4957 | spin_unlock_irqrestore(ap->lock, flags); |
3ef3b43d | 4958 | |
72fa4b74 TH |
4959 | memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
4960 | sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); | |
3ef3b43d TH |
4961 | dev->pio_mask = UINT_MAX; |
4962 | dev->mwdma_mask = UINT_MAX; | |
4963 | dev->udma_mask = UINT_MAX; | |
4964 | } | |
4965 | ||
4fb37a25 TH |
4966 | /** |
4967 | * ata_link_init - Initialize an ata_link structure | |
4968 | * @ap: ATA port link is attached to | |
4969 | * @link: Link structure to initialize | |
8989805d | 4970 | * @pmp: Port multiplier port number |
4fb37a25 TH |
4971 | * |
4972 | * Initialize @link. | |
4973 | * | |
4974 | * LOCKING: | |
4975 | * Kernel thread context (may sleep) | |
4976 | */ | |
fb7fd614 | 4977 | void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
4fb37a25 TH |
4978 | { |
4979 | int i; | |
4980 | ||
4981 | /* clear everything except for devices */ | |
4982 | memset(link, 0, offsetof(struct ata_link, device[0])); | |
4983 | ||
4984 | link->ap = ap; | |
8989805d | 4985 | link->pmp = pmp; |
4fb37a25 TH |
4986 | link->active_tag = ATA_TAG_POISON; |
4987 | link->hw_sata_spd_limit = UINT_MAX; | |
4988 | ||
4989 | /* can't use iterator, ap isn't initialized yet */ | |
4990 | for (i = 0; i < ATA_MAX_DEVICES; i++) { | |
4991 | struct ata_device *dev = &link->device[i]; | |
4992 | ||
4993 | dev->link = link; | |
4994 | dev->devno = dev - link->device; | |
4995 | ata_dev_init(dev); | |
4996 | } | |
4997 | } | |
4998 | ||
4999 | /** | |
5000 | * sata_link_init_spd - Initialize link->sata_spd_limit | |
5001 | * @link: Link to configure sata_spd_limit for | |
5002 | * | |
5003 | * Initialize @link->[hw_]sata_spd_limit to the currently | |
5004 | * configured value. | |
5005 | * | |
5006 | * LOCKING: | |
5007 | * Kernel thread context (may sleep). | |
5008 | * | |
5009 | * RETURNS: | |
5010 | * 0 on success, -errno on failure. | |
5011 | */ | |
fb7fd614 | 5012 | int sata_link_init_spd(struct ata_link *link) |
4fb37a25 | 5013 | { |
33267325 TH |
5014 | u32 scontrol; |
5015 | u8 spd; | |
4fb37a25 TH |
5016 | int rc; |
5017 | ||
5018 | rc = sata_scr_read(link, SCR_CONTROL, &scontrol); | |
5019 | if (rc) | |
5020 | return rc; | |
5021 | ||
5022 | spd = (scontrol >> 4) & 0xf; | |
5023 | if (spd) | |
5024 | link->hw_sata_spd_limit &= (1 << spd) - 1; | |
5025 | ||
33267325 TH |
5026 | ata_force_spd_limit(link); |
5027 | ||
4fb37a25 TH |
5028 | link->sata_spd_limit = link->hw_sata_spd_limit; |
5029 | ||
5030 | return 0; | |
5031 | } | |
5032 | ||
1da177e4 | 5033 | /** |
f3187195 TH |
5034 | * ata_port_alloc - allocate and initialize basic ATA port resources |
5035 | * @host: ATA host this allocated port belongs to | |
1da177e4 | 5036 | * |
f3187195 TH |
5037 | * Allocate and initialize basic ATA port resources. |
5038 | * | |
5039 | * RETURNS: | |
5040 | * Allocate ATA port on success, NULL on failure. | |
0cba632b | 5041 | * |
1da177e4 | 5042 | * LOCKING: |
f3187195 | 5043 | * Inherited from calling layer (may sleep). |
1da177e4 | 5044 | */ |
f3187195 | 5045 | struct ata_port *ata_port_alloc(struct ata_host *host) |
1da177e4 | 5046 | { |
f3187195 | 5047 | struct ata_port *ap; |
1da177e4 | 5048 | |
f3187195 TH |
5049 | DPRINTK("ENTER\n"); |
5050 | ||
5051 | ap = kzalloc(sizeof(*ap), GFP_KERNEL); | |
5052 | if (!ap) | |
5053 | return NULL; | |
5054 | ||
f4d6d004 | 5055 | ap->pflags |= ATA_PFLAG_INITIALIZING; |
cca3974e | 5056 | ap->lock = &host->lock; |
198e0fed | 5057 | ap->flags = ATA_FLAG_DISABLED; |
f3187195 | 5058 | ap->print_id = -1; |
1da177e4 | 5059 | ap->ctl = ATA_DEVCTL_OBS; |
cca3974e | 5060 | ap->host = host; |
f3187195 | 5061 | ap->dev = host->dev; |
1da177e4 | 5062 | ap->last_ctl = 0xFF; |
bd5d825c BP |
5063 | |
5064 | #if defined(ATA_VERBOSE_DEBUG) | |
5065 | /* turn on all debugging levels */ | |
5066 | ap->msg_enable = 0x00FF; | |
5067 | #elif defined(ATA_DEBUG) | |
5068 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; | |
88574551 | 5069 | #else |
0dd4b21f | 5070 | ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
bd5d825c | 5071 | #endif |
1da177e4 | 5072 | |
442eacc3 | 5073 | INIT_DELAYED_WORK(&ap->port_task, ata_pio_task); |
65f27f38 DH |
5074 | INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
5075 | INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); | |
a72ec4ce | 5076 | INIT_LIST_HEAD(&ap->eh_done_q); |
c6cf9e99 | 5077 | init_waitqueue_head(&ap->eh_wait_q); |
5ddf24c5 TH |
5078 | init_timer_deferrable(&ap->fastdrain_timer); |
5079 | ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; | |
5080 | ap->fastdrain_timer.data = (unsigned long)ap; | |
1da177e4 | 5081 | |
838df628 | 5082 | ap->cbl = ATA_CBL_NONE; |
838df628 | 5083 | |
8989805d | 5084 | ata_link_init(ap, &ap->link, 0); |
1da177e4 LT |
5085 | |
5086 | #ifdef ATA_IRQ_TRAP | |
5087 | ap->stats.unhandled_irq = 1; | |
5088 | ap->stats.idle_irq = 1; | |
5089 | #endif | |
1da177e4 | 5090 | return ap; |
1da177e4 LT |
5091 | } |
5092 | ||
f0d36efd TH |
5093 | static void ata_host_release(struct device *gendev, void *res) |
5094 | { | |
5095 | struct ata_host *host = dev_get_drvdata(gendev); | |
5096 | int i; | |
5097 | ||
1aa506e4 TH |
5098 | for (i = 0; i < host->n_ports; i++) { |
5099 | struct ata_port *ap = host->ports[i]; | |
5100 | ||
4911487a TH |
5101 | if (!ap) |
5102 | continue; | |
5103 | ||
5104 | if (ap->scsi_host) | |
1aa506e4 TH |
5105 | scsi_host_put(ap->scsi_host); |
5106 | ||
633273a3 | 5107 | kfree(ap->pmp_link); |
4911487a | 5108 | kfree(ap); |
1aa506e4 TH |
5109 | host->ports[i] = NULL; |
5110 | } | |
5111 | ||
1aa56cca | 5112 | dev_set_drvdata(gendev, NULL); |
f0d36efd TH |
5113 | } |
5114 | ||
f3187195 TH |
5115 | /** |
5116 | * ata_host_alloc - allocate and init basic ATA host resources | |
5117 | * @dev: generic device this host is associated with | |
5118 | * @max_ports: maximum number of ATA ports associated with this host | |
5119 | * | |
5120 | * Allocate and initialize basic ATA host resources. LLD calls | |
5121 | * this function to allocate a host, initializes it fully and | |
5122 | * attaches it using ata_host_register(). | |
5123 | * | |
5124 | * @max_ports ports are allocated and host->n_ports is | |
5125 | * initialized to @max_ports. The caller is allowed to decrease | |
5126 | * host->n_ports before calling ata_host_register(). The unused | |
5127 | * ports will be automatically freed on registration. | |
5128 | * | |
5129 | * RETURNS: | |
5130 | * Allocate ATA host on success, NULL on failure. | |
5131 | * | |
5132 | * LOCKING: | |
5133 | * Inherited from calling layer (may sleep). | |
5134 | */ | |
5135 | struct ata_host *ata_host_alloc(struct device *dev, int max_ports) | |
5136 | { | |
5137 | struct ata_host *host; | |
5138 | size_t sz; | |
5139 | int i; | |
5140 | ||
5141 | DPRINTK("ENTER\n"); | |
5142 | ||
5143 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) | |
5144 | return NULL; | |
5145 | ||
5146 | /* alloc a container for our list of ATA ports (buses) */ | |
5147 | sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); | |
5148 | /* alloc a container for our list of ATA ports (buses) */ | |
5149 | host = devres_alloc(ata_host_release, sz, GFP_KERNEL); | |
5150 | if (!host) | |
5151 | goto err_out; | |
5152 | ||
5153 | devres_add(dev, host); | |
5154 | dev_set_drvdata(dev, host); | |
5155 | ||
5156 | spin_lock_init(&host->lock); | |
5157 | host->dev = dev; | |
5158 | host->n_ports = max_ports; | |
5159 | ||
5160 | /* allocate ports bound to this host */ | |
5161 | for (i = 0; i < max_ports; i++) { | |
5162 | struct ata_port *ap; | |
5163 | ||
5164 | ap = ata_port_alloc(host); | |
5165 | if (!ap) | |
5166 | goto err_out; | |
5167 | ||
5168 | ap->port_no = i; | |
5169 | host->ports[i] = ap; | |
5170 | } | |
5171 | ||
5172 | devres_remove_group(dev, NULL); | |
5173 | return host; | |
5174 | ||
5175 | err_out: | |
5176 | devres_release_group(dev, NULL); | |
5177 | return NULL; | |
5178 | } | |
5179 | ||
f5cda257 TH |
5180 | /** |
5181 | * ata_host_alloc_pinfo - alloc host and init with port_info array | |
5182 | * @dev: generic device this host is associated with | |
5183 | * @ppi: array of ATA port_info to initialize host with | |
5184 | * @n_ports: number of ATA ports attached to this host | |
5185 | * | |
5186 | * Allocate ATA host and initialize with info from @ppi. If NULL | |
5187 | * terminated, @ppi may contain fewer entries than @n_ports. The | |
5188 | * last entry will be used for the remaining ports. | |
5189 | * | |
5190 | * RETURNS: | |
5191 | * Allocate ATA host on success, NULL on failure. | |
5192 | * | |
5193 | * LOCKING: | |
5194 | * Inherited from calling layer (may sleep). | |
5195 | */ | |
5196 | struct ata_host *ata_host_alloc_pinfo(struct device *dev, | |
5197 | const struct ata_port_info * const * ppi, | |
5198 | int n_ports) | |
5199 | { | |
5200 | const struct ata_port_info *pi; | |
5201 | struct ata_host *host; | |
5202 | int i, j; | |
5203 | ||
5204 | host = ata_host_alloc(dev, n_ports); | |
5205 | if (!host) | |
5206 | return NULL; | |
5207 | ||
5208 | for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { | |
5209 | struct ata_port *ap = host->ports[i]; | |
5210 | ||
5211 | if (ppi[j]) | |
5212 | pi = ppi[j++]; | |
5213 | ||
5214 | ap->pio_mask = pi->pio_mask; | |
5215 | ap->mwdma_mask = pi->mwdma_mask; | |
5216 | ap->udma_mask = pi->udma_mask; | |
5217 | ap->flags |= pi->flags; | |
0c88758b | 5218 | ap->link.flags |= pi->link_flags; |
f5cda257 TH |
5219 | ap->ops = pi->port_ops; |
5220 | ||
5221 | if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) | |
5222 | host->ops = pi->port_ops; | |
f5cda257 TH |
5223 | } |
5224 | ||
5225 | return host; | |
5226 | } | |
5227 | ||
32ebbc0c TH |
5228 | static void ata_host_stop(struct device *gendev, void *res) |
5229 | { | |
5230 | struct ata_host *host = dev_get_drvdata(gendev); | |
5231 | int i; | |
5232 | ||
5233 | WARN_ON(!(host->flags & ATA_HOST_STARTED)); | |
5234 | ||
5235 | for (i = 0; i < host->n_ports; i++) { | |
5236 | struct ata_port *ap = host->ports[i]; | |
5237 | ||
5238 | if (ap->ops->port_stop) | |
5239 | ap->ops->port_stop(ap); | |
5240 | } | |
5241 | ||
5242 | if (host->ops->host_stop) | |
5243 | host->ops->host_stop(host); | |
5244 | } | |
5245 | ||
029cfd6b TH |
5246 | /** |
5247 | * ata_finalize_port_ops - finalize ata_port_operations | |
5248 | * @ops: ata_port_operations to finalize | |
5249 | * | |
5250 | * An ata_port_operations can inherit from another ops and that | |
5251 | * ops can again inherit from another. This can go on as many | |
5252 | * times as necessary as long as there is no loop in the | |
5253 | * inheritance chain. | |
5254 | * | |
5255 | * Ops tables are finalized when the host is started. NULL or | |
5256 | * unspecified entries are inherited from the closet ancestor | |
5257 | * which has the method and the entry is populated with it. | |
5258 | * After finalization, the ops table directly points to all the | |
5259 | * methods and ->inherits is no longer necessary and cleared. | |
5260 | * | |
5261 | * Using ATA_OP_NULL, inheriting ops can force a method to NULL. | |
5262 | * | |
5263 | * LOCKING: | |
5264 | * None. | |
5265 | */ | |
5266 | static void ata_finalize_port_ops(struct ata_port_operations *ops) | |
5267 | { | |
5268 | static spinlock_t lock = SPIN_LOCK_UNLOCKED; | |
5269 | const struct ata_port_operations *cur; | |
5270 | void **begin = (void **)ops; | |
5271 | void **end = (void **)&ops->inherits; | |
5272 | void **pp; | |
5273 | ||
5274 | if (!ops || !ops->inherits) | |
5275 | return; | |
5276 | ||
5277 | spin_lock(&lock); | |
5278 | ||
5279 | for (cur = ops->inherits; cur; cur = cur->inherits) { | |
5280 | void **inherit = (void **)cur; | |
5281 | ||
5282 | for (pp = begin; pp < end; pp++, inherit++) | |
5283 | if (!*pp) | |
5284 | *pp = *inherit; | |
5285 | } | |
5286 | ||
5287 | for (pp = begin; pp < end; pp++) | |
5288 | if (IS_ERR(*pp)) | |
5289 | *pp = NULL; | |
5290 | ||
5291 | ops->inherits = NULL; | |
5292 | ||
5293 | spin_unlock(&lock); | |
5294 | } | |
5295 | ||
ecef7253 TH |
5296 | /** |
5297 | * ata_host_start - start and freeze ports of an ATA host | |
5298 | * @host: ATA host to start ports for | |
5299 | * | |
5300 | * Start and then freeze ports of @host. Started status is | |
5301 | * recorded in host->flags, so this function can be called | |
5302 | * multiple times. Ports are guaranteed to get started only | |
f3187195 TH |
5303 | * once. If host->ops isn't initialized yet, its set to the |
5304 | * first non-dummy port ops. | |
ecef7253 TH |
5305 | * |
5306 | * LOCKING: | |
5307 | * Inherited from calling layer (may sleep). | |
5308 | * | |
5309 | * RETURNS: | |
5310 | * 0 if all ports are started successfully, -errno otherwise. | |
5311 | */ | |
5312 | int ata_host_start(struct ata_host *host) | |
5313 | { | |
32ebbc0c TH |
5314 | int have_stop = 0; |
5315 | void *start_dr = NULL; | |
ecef7253 TH |
5316 | int i, rc; |
5317 | ||
5318 | if (host->flags & ATA_HOST_STARTED) | |
5319 | return 0; | |
5320 | ||
029cfd6b TH |
5321 | ata_finalize_port_ops(host->ops); |
5322 | ||
ecef7253 TH |
5323 | for (i = 0; i < host->n_ports; i++) { |
5324 | struct ata_port *ap = host->ports[i]; | |
5325 | ||
029cfd6b TH |
5326 | ata_finalize_port_ops(ap->ops); |
5327 | ||
f3187195 TH |
5328 | if (!host->ops && !ata_port_is_dummy(ap)) |
5329 | host->ops = ap->ops; | |
5330 | ||
32ebbc0c TH |
5331 | if (ap->ops->port_stop) |
5332 | have_stop = 1; | |
5333 | } | |
5334 | ||
5335 | if (host->ops->host_stop) | |
5336 | have_stop = 1; | |
5337 | ||
5338 | if (have_stop) { | |
5339 | start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); | |
5340 | if (!start_dr) | |
5341 | return -ENOMEM; | |
5342 | } | |
5343 | ||
5344 | for (i = 0; i < host->n_ports; i++) { | |
5345 | struct ata_port *ap = host->ports[i]; | |
5346 | ||
ecef7253 TH |
5347 | if (ap->ops->port_start) { |
5348 | rc = ap->ops->port_start(ap); | |
5349 | if (rc) { | |
0f9fe9b7 | 5350 | if (rc != -ENODEV) |
0f757743 AM |
5351 | dev_printk(KERN_ERR, host->dev, |
5352 | "failed to start port %d " | |
5353 | "(errno=%d)\n", i, rc); | |
ecef7253 TH |
5354 | goto err_out; |
5355 | } | |
5356 | } | |
ecef7253 TH |
5357 | ata_eh_freeze_port(ap); |
5358 | } | |
5359 | ||
32ebbc0c TH |
5360 | if (start_dr) |
5361 | devres_add(host->dev, start_dr); | |
ecef7253 TH |
5362 | host->flags |= ATA_HOST_STARTED; |
5363 | return 0; | |
5364 | ||
5365 | err_out: | |
5366 | while (--i >= 0) { | |
5367 | struct ata_port *ap = host->ports[i]; | |
5368 | ||
5369 | if (ap->ops->port_stop) | |
5370 | ap->ops->port_stop(ap); | |
5371 | } | |
32ebbc0c | 5372 | devres_free(start_dr); |
ecef7253 TH |
5373 | return rc; |
5374 | } | |
5375 | ||
b03732f0 | 5376 | /** |
cca3974e JG |
5377 | * ata_sas_host_init - Initialize a host struct |
5378 | * @host: host to initialize | |
5379 | * @dev: device host is attached to | |
5380 | * @flags: host flags | |
5381 | * @ops: port_ops | |
b03732f0 BK |
5382 | * |
5383 | * LOCKING: | |
5384 | * PCI/etc. bus probe sem. | |
5385 | * | |
5386 | */ | |
f3187195 | 5387 | /* KILLME - the only user left is ipr */ |
cca3974e | 5388 | void ata_host_init(struct ata_host *host, struct device *dev, |
029cfd6b | 5389 | unsigned long flags, struct ata_port_operations *ops) |
b03732f0 | 5390 | { |
cca3974e JG |
5391 | spin_lock_init(&host->lock); |
5392 | host->dev = dev; | |
5393 | host->flags = flags; | |
5394 | host->ops = ops; | |
b03732f0 BK |
5395 | } |
5396 | ||
f3187195 TH |
5397 | /** |
5398 | * ata_host_register - register initialized ATA host | |
5399 | * @host: ATA host to register | |
5400 | * @sht: template for SCSI host | |
5401 | * | |
5402 | * Register initialized ATA host. @host is allocated using | |
5403 | * ata_host_alloc() and fully initialized by LLD. This function | |
5404 | * starts ports, registers @host with ATA and SCSI layers and | |
5405 | * probe registered devices. | |
5406 | * | |
5407 | * LOCKING: | |
5408 | * Inherited from calling layer (may sleep). | |
5409 | * | |
5410 | * RETURNS: | |
5411 | * 0 on success, -errno otherwise. | |
5412 | */ | |
5413 | int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) | |
5414 | { | |
5415 | int i, rc; | |
5416 | ||
5417 | /* host must have been started */ | |
5418 | if (!(host->flags & ATA_HOST_STARTED)) { | |
5419 | dev_printk(KERN_ERR, host->dev, | |
5420 | "BUG: trying to register unstarted host\n"); | |
5421 | WARN_ON(1); | |
5422 | return -EINVAL; | |
5423 | } | |
5424 | ||
5425 | /* Blow away unused ports. This happens when LLD can't | |
5426 | * determine the exact number of ports to allocate at | |
5427 | * allocation time. | |
5428 | */ | |
5429 | for (i = host->n_ports; host->ports[i]; i++) | |
5430 | kfree(host->ports[i]); | |
5431 | ||
5432 | /* give ports names and add SCSI hosts */ | |
5433 | for (i = 0; i < host->n_ports; i++) | |
5434 | host->ports[i]->print_id = ata_print_id++; | |
5435 | ||
5436 | rc = ata_scsi_add_hosts(host, sht); | |
5437 | if (rc) | |
5438 | return rc; | |
5439 | ||
fafbae87 TH |
5440 | /* associate with ACPI nodes */ |
5441 | ata_acpi_associate(host); | |
5442 | ||
f3187195 TH |
5443 | /* set cable, sata_spd_limit and report */ |
5444 | for (i = 0; i < host->n_ports; i++) { | |
5445 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
5446 | unsigned long xfer_mask; |
5447 | ||
5448 | /* set SATA cable type if still unset */ | |
5449 | if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) | |
5450 | ap->cbl = ATA_CBL_SATA; | |
5451 | ||
5452 | /* init sata_spd_limit to the current value */ | |
4fb37a25 | 5453 | sata_link_init_spd(&ap->link); |
f3187195 | 5454 | |
cbcdd875 | 5455 | /* print per-port info to dmesg */ |
f3187195 TH |
5456 | xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
5457 | ap->udma_mask); | |
5458 | ||
abf6e8ed | 5459 | if (!ata_port_is_dummy(ap)) { |
cbcdd875 TH |
5460 | ata_port_printk(ap, KERN_INFO, |
5461 | "%cATA max %s %s\n", | |
a16abc0b | 5462 | (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
f3187195 | 5463 | ata_mode_string(xfer_mask), |
cbcdd875 | 5464 | ap->link.eh_info.desc); |
abf6e8ed TH |
5465 | ata_ehi_clear_desc(&ap->link.eh_info); |
5466 | } else | |
f3187195 TH |
5467 | ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
5468 | } | |
5469 | ||
5470 | /* perform each probe synchronously */ | |
5471 | DPRINTK("probe begin\n"); | |
5472 | for (i = 0; i < host->n_ports; i++) { | |
5473 | struct ata_port *ap = host->ports[i]; | |
f3187195 TH |
5474 | |
5475 | /* probe */ | |
5476 | if (ap->ops->error_handler) { | |
9af5c9c9 | 5477 | struct ata_eh_info *ehi = &ap->link.eh_info; |
f3187195 TH |
5478 | unsigned long flags; |
5479 | ||
5480 | ata_port_probe(ap); | |
5481 | ||
5482 | /* kick EH for boot probing */ | |
5483 | spin_lock_irqsave(ap->lock, flags); | |
5484 | ||
b558eddd | 5485 | ehi->probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 5486 | ehi->action |= ATA_EH_RESET; |
f3187195 TH |
5487 | ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; |
5488 | ||
f4d6d004 | 5489 | ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
f3187195 TH |
5490 | ap->pflags |= ATA_PFLAG_LOADING; |
5491 | ata_port_schedule_eh(ap); | |
5492 | ||
5493 | spin_unlock_irqrestore(ap->lock, flags); | |
5494 | ||
5495 | /* wait for EH to finish */ | |
5496 | ata_port_wait_eh(ap); | |
5497 | } else { | |
5498 | DPRINTK("ata%u: bus probe begin\n", ap->print_id); | |
5499 | rc = ata_bus_probe(ap); | |
5500 | DPRINTK("ata%u: bus probe end\n", ap->print_id); | |
5501 | ||
5502 | if (rc) { | |
5503 | /* FIXME: do something useful here? | |
5504 | * Current libata behavior will | |
5505 | * tear down everything when | |
5506 | * the module is removed | |
5507 | * or the h/w is unplugged. | |
5508 | */ | |
5509 | } | |
5510 | } | |
5511 | } | |
5512 | ||
5513 | /* probes are done, now scan each port's disk(s) */ | |
5514 | DPRINTK("host probe begin\n"); | |
5515 | for (i = 0; i < host->n_ports; i++) { | |
5516 | struct ata_port *ap = host->ports[i]; | |
5517 | ||
1ae46317 | 5518 | ata_scsi_scan_host(ap, 1); |
ca77329f | 5519 | ata_lpm_schedule(ap, ap->pm_policy); |
f3187195 TH |
5520 | } |
5521 | ||
5522 | return 0; | |
5523 | } | |
5524 | ||
f5cda257 TH |
5525 | /** |
5526 | * ata_host_activate - start host, request IRQ and register it | |
5527 | * @host: target ATA host | |
5528 | * @irq: IRQ to request | |
5529 | * @irq_handler: irq_handler used when requesting IRQ | |
5530 | * @irq_flags: irq_flags used when requesting IRQ | |
5531 | * @sht: scsi_host_template to use when registering the host | |
5532 | * | |
5533 | * After allocating an ATA host and initializing it, most libata | |
5534 | * LLDs perform three steps to activate the host - start host, | |
5535 | * request IRQ and register it. This helper takes necessasry | |
5536 | * arguments and performs the three steps in one go. | |
5537 | * | |
3d46b2e2 PM |
5538 | * An invalid IRQ skips the IRQ registration and expects the host to |
5539 | * have set polling mode on the port. In this case, @irq_handler | |
5540 | * should be NULL. | |
5541 | * | |
f5cda257 TH |
5542 | * LOCKING: |
5543 | * Inherited from calling layer (may sleep). | |
5544 | * | |
5545 | * RETURNS: | |
5546 | * 0 on success, -errno otherwise. | |
5547 | */ | |
5548 | int ata_host_activate(struct ata_host *host, int irq, | |
5549 | irq_handler_t irq_handler, unsigned long irq_flags, | |
5550 | struct scsi_host_template *sht) | |
5551 | { | |
cbcdd875 | 5552 | int i, rc; |
f5cda257 TH |
5553 | |
5554 | rc = ata_host_start(host); | |
5555 | if (rc) | |
5556 | return rc; | |
5557 | ||
3d46b2e2 PM |
5558 | /* Special case for polling mode */ |
5559 | if (!irq) { | |
5560 | WARN_ON(irq_handler); | |
5561 | return ata_host_register(host, sht); | |
5562 | } | |
5563 | ||
f5cda257 TH |
5564 | rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
5565 | dev_driver_string(host->dev), host); | |
5566 | if (rc) | |
5567 | return rc; | |
5568 | ||
cbcdd875 TH |
5569 | for (i = 0; i < host->n_ports; i++) |
5570 | ata_port_desc(host->ports[i], "irq %d", irq); | |
4031826b | 5571 | |
f5cda257 TH |
5572 | rc = ata_host_register(host, sht); |
5573 | /* if failed, just free the IRQ and leave ports alone */ | |
5574 | if (rc) | |
5575 | devm_free_irq(host->dev, irq, host); | |
5576 | ||
5577 | return rc; | |
5578 | } | |
5579 | ||
720ba126 TH |
5580 | /** |
5581 | * ata_port_detach - Detach ATA port in prepration of device removal | |
5582 | * @ap: ATA port to be detached | |
5583 | * | |
5584 | * Detach all ATA devices and the associated SCSI devices of @ap; | |
5585 | * then, remove the associated SCSI host. @ap is guaranteed to | |
5586 | * be quiescent on return from this function. | |
5587 | * | |
5588 | * LOCKING: | |
5589 | * Kernel thread context (may sleep). | |
5590 | */ | |
741b7763 | 5591 | static void ata_port_detach(struct ata_port *ap) |
720ba126 TH |
5592 | { |
5593 | unsigned long flags; | |
41bda9c9 | 5594 | struct ata_link *link; |
f58229f8 | 5595 | struct ata_device *dev; |
720ba126 TH |
5596 | |
5597 | if (!ap->ops->error_handler) | |
c3cf30a9 | 5598 | goto skip_eh; |
720ba126 TH |
5599 | |
5600 | /* tell EH we're leaving & flush EH */ | |
ba6a1308 | 5601 | spin_lock_irqsave(ap->lock, flags); |
b51e9e5d | 5602 | ap->pflags |= ATA_PFLAG_UNLOADING; |
ba6a1308 | 5603 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
5604 | |
5605 | ata_port_wait_eh(ap); | |
5606 | ||
7f9ad9b8 TH |
5607 | /* EH is now guaranteed to see UNLOADING - EH context belongs |
5608 | * to us. Disable all existing devices. | |
720ba126 | 5609 | */ |
41bda9c9 TH |
5610 | ata_port_for_each_link(link, ap) { |
5611 | ata_link_for_each_dev(dev, link) | |
5612 | ata_dev_disable(dev); | |
5613 | } | |
720ba126 | 5614 | |
720ba126 TH |
5615 | /* Final freeze & EH. All in-flight commands are aborted. EH |
5616 | * will be skipped and retrials will be terminated with bad | |
5617 | * target. | |
5618 | */ | |
ba6a1308 | 5619 | spin_lock_irqsave(ap->lock, flags); |
720ba126 | 5620 | ata_port_freeze(ap); /* won't be thawed */ |
ba6a1308 | 5621 | spin_unlock_irqrestore(ap->lock, flags); |
720ba126 TH |
5622 | |
5623 | ata_port_wait_eh(ap); | |
45a66c1c | 5624 | cancel_rearming_delayed_work(&ap->hotplug_task); |
720ba126 | 5625 | |
c3cf30a9 | 5626 | skip_eh: |
720ba126 | 5627 | /* remove the associated SCSI host */ |
cca3974e | 5628 | scsi_remove_host(ap->scsi_host); |
720ba126 TH |
5629 | } |
5630 | ||
0529c159 TH |
5631 | /** |
5632 | * ata_host_detach - Detach all ports of an ATA host | |
5633 | * @host: Host to detach | |
5634 | * | |
5635 | * Detach all ports of @host. | |
5636 | * | |
5637 | * LOCKING: | |
5638 | * Kernel thread context (may sleep). | |
5639 | */ | |
5640 | void ata_host_detach(struct ata_host *host) | |
5641 | { | |
5642 | int i; | |
5643 | ||
5644 | for (i = 0; i < host->n_ports; i++) | |
5645 | ata_port_detach(host->ports[i]); | |
562f0c2d TH |
5646 | |
5647 | /* the host is dead now, dissociate ACPI */ | |
5648 | ata_acpi_dissociate(host); | |
0529c159 TH |
5649 | } |
5650 | ||
374b1873 JG |
5651 | #ifdef CONFIG_PCI |
5652 | ||
1da177e4 LT |
5653 | /** |
5654 | * ata_pci_remove_one - PCI layer callback for device removal | |
5655 | * @pdev: PCI device that was removed | |
5656 | * | |
b878ca5d TH |
5657 | * PCI layer indicates to libata via this hook that hot-unplug or |
5658 | * module unload event has occurred. Detach all ports. Resource | |
5659 | * release is handled via devres. | |
1da177e4 LT |
5660 | * |
5661 | * LOCKING: | |
5662 | * Inherited from PCI layer (may sleep). | |
5663 | */ | |
f0d36efd | 5664 | void ata_pci_remove_one(struct pci_dev *pdev) |
1da177e4 | 5665 | { |
2855568b | 5666 | struct device *dev = &pdev->dev; |
cca3974e | 5667 | struct ata_host *host = dev_get_drvdata(dev); |
1da177e4 | 5668 | |
b878ca5d | 5669 | ata_host_detach(host); |
1da177e4 LT |
5670 | } |
5671 | ||
5672 | /* move to PCI subsystem */ | |
057ace5e | 5673 | int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
1da177e4 LT |
5674 | { |
5675 | unsigned long tmp = 0; | |
5676 | ||
5677 | switch (bits->width) { | |
5678 | case 1: { | |
5679 | u8 tmp8 = 0; | |
5680 | pci_read_config_byte(pdev, bits->reg, &tmp8); | |
5681 | tmp = tmp8; | |
5682 | break; | |
5683 | } | |
5684 | case 2: { | |
5685 | u16 tmp16 = 0; | |
5686 | pci_read_config_word(pdev, bits->reg, &tmp16); | |
5687 | tmp = tmp16; | |
5688 | break; | |
5689 | } | |
5690 | case 4: { | |
5691 | u32 tmp32 = 0; | |
5692 | pci_read_config_dword(pdev, bits->reg, &tmp32); | |
5693 | tmp = tmp32; | |
5694 | break; | |
5695 | } | |
5696 | ||
5697 | default: | |
5698 | return -EINVAL; | |
5699 | } | |
5700 | ||
5701 | tmp &= bits->mask; | |
5702 | ||
5703 | return (tmp == bits->val) ? 1 : 0; | |
5704 | } | |
9b847548 | 5705 | |
6ffa01d8 | 5706 | #ifdef CONFIG_PM |
3c5100c1 | 5707 | void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
9b847548 JA |
5708 | { |
5709 | pci_save_state(pdev); | |
4c90d971 | 5710 | pci_disable_device(pdev); |
500530f6 | 5711 | |
3a2d5b70 | 5712 | if (mesg.event & PM_EVENT_SLEEP) |
500530f6 | 5713 | pci_set_power_state(pdev, PCI_D3hot); |
9b847548 JA |
5714 | } |
5715 | ||
553c4aa6 | 5716 | int ata_pci_device_do_resume(struct pci_dev *pdev) |
9b847548 | 5717 | { |
553c4aa6 TH |
5718 | int rc; |
5719 | ||
9b847548 JA |
5720 | pci_set_power_state(pdev, PCI_D0); |
5721 | pci_restore_state(pdev); | |
553c4aa6 | 5722 | |
b878ca5d | 5723 | rc = pcim_enable_device(pdev); |
553c4aa6 TH |
5724 | if (rc) { |
5725 | dev_printk(KERN_ERR, &pdev->dev, | |
5726 | "failed to enable device after resume (%d)\n", rc); | |
5727 | return rc; | |
5728 | } | |
5729 | ||
9b847548 | 5730 | pci_set_master(pdev); |
553c4aa6 | 5731 | return 0; |
500530f6 TH |
5732 | } |
5733 | ||
3c5100c1 | 5734 | int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
500530f6 | 5735 | { |
cca3974e | 5736 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
500530f6 TH |
5737 | int rc = 0; |
5738 | ||
cca3974e | 5739 | rc = ata_host_suspend(host, mesg); |
500530f6 TH |
5740 | if (rc) |
5741 | return rc; | |
5742 | ||
3c5100c1 | 5743 | ata_pci_device_do_suspend(pdev, mesg); |
500530f6 TH |
5744 | |
5745 | return 0; | |
5746 | } | |
5747 | ||
5748 | int ata_pci_device_resume(struct pci_dev *pdev) | |
5749 | { | |
cca3974e | 5750 | struct ata_host *host = dev_get_drvdata(&pdev->dev); |
553c4aa6 | 5751 | int rc; |
500530f6 | 5752 | |
553c4aa6 TH |
5753 | rc = ata_pci_device_do_resume(pdev); |
5754 | if (rc == 0) | |
5755 | ata_host_resume(host); | |
5756 | return rc; | |
9b847548 | 5757 | } |
6ffa01d8 TH |
5758 | #endif /* CONFIG_PM */ |
5759 | ||
1da177e4 LT |
5760 | #endif /* CONFIG_PCI */ |
5761 | ||
33267325 TH |
5762 | static int __init ata_parse_force_one(char **cur, |
5763 | struct ata_force_ent *force_ent, | |
5764 | const char **reason) | |
5765 | { | |
5766 | /* FIXME: Currently, there's no way to tag init const data and | |
5767 | * using __initdata causes build failure on some versions of | |
5768 | * gcc. Once __initdataconst is implemented, add const to the | |
5769 | * following structure. | |
5770 | */ | |
5771 | static struct ata_force_param force_tbl[] __initdata = { | |
5772 | { "40c", .cbl = ATA_CBL_PATA40 }, | |
5773 | { "80c", .cbl = ATA_CBL_PATA80 }, | |
5774 | { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, | |
5775 | { "unk", .cbl = ATA_CBL_PATA_UNK }, | |
5776 | { "ign", .cbl = ATA_CBL_PATA_IGN }, | |
5777 | { "sata", .cbl = ATA_CBL_SATA }, | |
5778 | { "1.5Gbps", .spd_limit = 1 }, | |
5779 | { "3.0Gbps", .spd_limit = 2 }, | |
5780 | { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, | |
5781 | { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, | |
5782 | { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, | |
5783 | { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, | |
5784 | { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, | |
5785 | { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, | |
5786 | { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, | |
5787 | { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, | |
5788 | { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, | |
5789 | { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, | |
5790 | { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, | |
5791 | { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, | |
5792 | { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, | |
5793 | { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, | |
5794 | { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
5795 | { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
5796 | { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, | |
5797 | { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
5798 | { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
5799 | { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, | |
5800 | { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
5801 | { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
5802 | { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, | |
5803 | { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
5804 | { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
5805 | { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, | |
5806 | { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
5807 | { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
5808 | { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, | |
5809 | { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
5810 | { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
5811 | { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, | |
5812 | { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
5813 | { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
5814 | { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, | |
5815 | { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, | |
5816 | }; | |
5817 | char *start = *cur, *p = *cur; | |
5818 | char *id, *val, *endp; | |
5819 | const struct ata_force_param *match_fp = NULL; | |
5820 | int nr_matches = 0, i; | |
5821 | ||
5822 | /* find where this param ends and update *cur */ | |
5823 | while (*p != '\0' && *p != ',') | |
5824 | p++; | |
5825 | ||
5826 | if (*p == '\0') | |
5827 | *cur = p; | |
5828 | else | |
5829 | *cur = p + 1; | |
5830 | ||
5831 | *p = '\0'; | |
5832 | ||
5833 | /* parse */ | |
5834 | p = strchr(start, ':'); | |
5835 | if (!p) { | |
5836 | val = strstrip(start); | |
5837 | goto parse_val; | |
5838 | } | |
5839 | *p = '\0'; | |
5840 | ||
5841 | id = strstrip(start); | |
5842 | val = strstrip(p + 1); | |
5843 | ||
5844 | /* parse id */ | |
5845 | p = strchr(id, '.'); | |
5846 | if (p) { | |
5847 | *p++ = '\0'; | |
5848 | force_ent->device = simple_strtoul(p, &endp, 10); | |
5849 | if (p == endp || *endp != '\0') { | |
5850 | *reason = "invalid device"; | |
5851 | return -EINVAL; | |
5852 | } | |
5853 | } | |
5854 | ||
5855 | force_ent->port = simple_strtoul(id, &endp, 10); | |
5856 | if (p == endp || *endp != '\0') { | |
5857 | *reason = "invalid port/link"; | |
5858 | return -EINVAL; | |
5859 | } | |
5860 | ||
5861 | parse_val: | |
5862 | /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ | |
5863 | for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { | |
5864 | const struct ata_force_param *fp = &force_tbl[i]; | |
5865 | ||
5866 | if (strncasecmp(val, fp->name, strlen(val))) | |
5867 | continue; | |
5868 | ||
5869 | nr_matches++; | |
5870 | match_fp = fp; | |
5871 | ||
5872 | if (strcasecmp(val, fp->name) == 0) { | |
5873 | nr_matches = 1; | |
5874 | break; | |
5875 | } | |
5876 | } | |
5877 | ||
5878 | if (!nr_matches) { | |
5879 | *reason = "unknown value"; | |
5880 | return -EINVAL; | |
5881 | } | |
5882 | if (nr_matches > 1) { | |
5883 | *reason = "ambigious value"; | |
5884 | return -EINVAL; | |
5885 | } | |
5886 | ||
5887 | force_ent->param = *match_fp; | |
5888 | ||
5889 | return 0; | |
5890 | } | |
5891 | ||
5892 | static void __init ata_parse_force_param(void) | |
5893 | { | |
5894 | int idx = 0, size = 1; | |
5895 | int last_port = -1, last_device = -1; | |
5896 | char *p, *cur, *next; | |
5897 | ||
5898 | /* calculate maximum number of params and allocate force_tbl */ | |
5899 | for (p = ata_force_param_buf; *p; p++) | |
5900 | if (*p == ',') | |
5901 | size++; | |
5902 | ||
5903 | ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); | |
5904 | if (!ata_force_tbl) { | |
5905 | printk(KERN_WARNING "ata: failed to extend force table, " | |
5906 | "libata.force ignored\n"); | |
5907 | return; | |
5908 | } | |
5909 | ||
5910 | /* parse and populate the table */ | |
5911 | for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { | |
5912 | const char *reason = ""; | |
5913 | struct ata_force_ent te = { .port = -1, .device = -1 }; | |
5914 | ||
5915 | next = cur; | |
5916 | if (ata_parse_force_one(&next, &te, &reason)) { | |
5917 | printk(KERN_WARNING "ata: failed to parse force " | |
5918 | "parameter \"%s\" (%s)\n", | |
5919 | cur, reason); | |
5920 | continue; | |
5921 | } | |
5922 | ||
5923 | if (te.port == -1) { | |
5924 | te.port = last_port; | |
5925 | te.device = last_device; | |
5926 | } | |
5927 | ||
5928 | ata_force_tbl[idx++] = te; | |
5929 | ||
5930 | last_port = te.port; | |
5931 | last_device = te.device; | |
5932 | } | |
5933 | ||
5934 | ata_force_tbl_size = idx; | |
5935 | } | |
1da177e4 | 5936 | |
1da177e4 LT |
5937 | static int __init ata_init(void) |
5938 | { | |
a8601e5f | 5939 | ata_probe_timeout *= HZ; |
33267325 TH |
5940 | |
5941 | ata_parse_force_param(); | |
5942 | ||
1da177e4 LT |
5943 | ata_wq = create_workqueue("ata"); |
5944 | if (!ata_wq) | |
5945 | return -ENOMEM; | |
5946 | ||
453b07ac TH |
5947 | ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
5948 | if (!ata_aux_wq) { | |
5949 | destroy_workqueue(ata_wq); | |
5950 | return -ENOMEM; | |
5951 | } | |
5952 | ||
1da177e4 LT |
5953 | printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
5954 | return 0; | |
5955 | } | |
5956 | ||
5957 | static void __exit ata_exit(void) | |
5958 | { | |
33267325 | 5959 | kfree(ata_force_tbl); |
1da177e4 | 5960 | destroy_workqueue(ata_wq); |
453b07ac | 5961 | destroy_workqueue(ata_aux_wq); |
1da177e4 LT |
5962 | } |
5963 | ||
a4625085 | 5964 | subsys_initcall(ata_init); |
1da177e4 LT |
5965 | module_exit(ata_exit); |
5966 | ||
67846b30 | 5967 | static unsigned long ratelimit_time; |
34af946a | 5968 | static DEFINE_SPINLOCK(ata_ratelimit_lock); |
67846b30 JG |
5969 | |
5970 | int ata_ratelimit(void) | |
5971 | { | |
5972 | int rc; | |
5973 | unsigned long flags; | |
5974 | ||
5975 | spin_lock_irqsave(&ata_ratelimit_lock, flags); | |
5976 | ||
5977 | if (time_after(jiffies, ratelimit_time)) { | |
5978 | rc = 1; | |
5979 | ratelimit_time = jiffies + (HZ/5); | |
5980 | } else | |
5981 | rc = 0; | |
5982 | ||
5983 | spin_unlock_irqrestore(&ata_ratelimit_lock, flags); | |
5984 | ||
5985 | return rc; | |
5986 | } | |
5987 | ||
c22daff4 TH |
5988 | /** |
5989 | * ata_wait_register - wait until register value changes | |
5990 | * @reg: IO-mapped register | |
5991 | * @mask: Mask to apply to read register value | |
5992 | * @val: Wait condition | |
5993 | * @interval_msec: polling interval in milliseconds | |
5994 | * @timeout_msec: timeout in milliseconds | |
5995 | * | |
5996 | * Waiting for some bits of register to change is a common | |
5997 | * operation for ATA controllers. This function reads 32bit LE | |
5998 | * IO-mapped register @reg and tests for the following condition. | |
5999 | * | |
6000 | * (*@reg & mask) != val | |
6001 | * | |
6002 | * If the condition is met, it returns; otherwise, the process is | |
6003 | * repeated after @interval_msec until timeout. | |
6004 | * | |
6005 | * LOCKING: | |
6006 | * Kernel thread context (may sleep) | |
6007 | * | |
6008 | * RETURNS: | |
6009 | * The final register value. | |
6010 | */ | |
6011 | u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, | |
6012 | unsigned long interval_msec, | |
6013 | unsigned long timeout_msec) | |
6014 | { | |
6015 | unsigned long timeout; | |
6016 | u32 tmp; | |
6017 | ||
6018 | tmp = ioread32(reg); | |
6019 | ||
6020 | /* Calculate timeout _after_ the first read to make sure | |
6021 | * preceding writes reach the controller before starting to | |
6022 | * eat away the timeout. | |
6023 | */ | |
6024 | timeout = jiffies + (timeout_msec * HZ) / 1000; | |
6025 | ||
6026 | while ((tmp & mask) == val && time_before(jiffies, timeout)) { | |
6027 | msleep(interval_msec); | |
6028 | tmp = ioread32(reg); | |
6029 | } | |
6030 | ||
6031 | return tmp; | |
6032 | } | |
6033 | ||
dd5b06c4 TH |
6034 | /* |
6035 | * Dummy port_ops | |
6036 | */ | |
6037 | static void ata_dummy_noret(struct ata_port *ap) { } | |
6038 | static int ata_dummy_ret0(struct ata_port *ap) { return 0; } | |
6039 | static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } | |
6040 | ||
6041 | static u8 ata_dummy_check_status(struct ata_port *ap) | |
6042 | { | |
6043 | return ATA_DRDY; | |
6044 | } | |
6045 | ||
6046 | static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) | |
6047 | { | |
6048 | return AC_ERR_SYSTEM; | |
6049 | } | |
6050 | ||
029cfd6b | 6051 | struct ata_port_operations ata_dummy_port_ops = { |
dd5b06c4 TH |
6052 | .check_status = ata_dummy_check_status, |
6053 | .check_altstatus = ata_dummy_check_status, | |
6054 | .dev_select = ata_noop_dev_select, | |
6055 | .qc_prep = ata_noop_qc_prep, | |
6056 | .qc_issue = ata_dummy_qc_issue, | |
6057 | .freeze = ata_dummy_noret, | |
6058 | .thaw = ata_dummy_noret, | |
6059 | .error_handler = ata_dummy_noret, | |
6060 | .post_internal_cmd = ata_dummy_qc_noret, | |
6061 | .irq_clear = ata_dummy_noret, | |
6062 | .port_start = ata_dummy_ret0, | |
6063 | .port_stop = ata_dummy_noret, | |
6064 | }; | |
6065 | ||
21b0ad4f TH |
6066 | const struct ata_port_info ata_dummy_port_info = { |
6067 | .port_ops = &ata_dummy_port_ops, | |
6068 | }; | |
6069 | ||
1da177e4 LT |
6070 | /* |
6071 | * libata is essentially a library of internal helper functions for | |
6072 | * low-level ATA host controller drivers. As such, the API/ABI is | |
6073 | * likely to change as new drivers are added and updated. | |
6074 | * Do not depend on ABI/API stability. | |
6075 | */ | |
e9c83914 TH |
6076 | EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
6077 | EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); | |
6078 | EXPORT_SYMBOL_GPL(sata_deb_timing_long); | |
029cfd6b TH |
6079 | EXPORT_SYMBOL_GPL(ata_base_port_ops); |
6080 | EXPORT_SYMBOL_GPL(sata_port_ops); | |
6081 | EXPORT_SYMBOL_GPL(sata_pmp_port_ops); | |
dd5b06c4 | 6082 | EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
21b0ad4f | 6083 | EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
1da177e4 | 6084 | EXPORT_SYMBOL_GPL(ata_std_bios_param); |
cca3974e | 6085 | EXPORT_SYMBOL_GPL(ata_host_init); |
f3187195 | 6086 | EXPORT_SYMBOL_GPL(ata_host_alloc); |
f5cda257 | 6087 | EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
ecef7253 | 6088 | EXPORT_SYMBOL_GPL(ata_host_start); |
f3187195 | 6089 | EXPORT_SYMBOL_GPL(ata_host_register); |
f5cda257 | 6090 | EXPORT_SYMBOL_GPL(ata_host_activate); |
0529c159 | 6091 | EXPORT_SYMBOL_GPL(ata_host_detach); |
1da177e4 | 6092 | EXPORT_SYMBOL_GPL(ata_sg_init); |
f686bcb8 | 6093 | EXPORT_SYMBOL_GPL(ata_qc_complete); |
dedaf2b0 | 6094 | EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
1da177e4 | 6095 | EXPORT_SYMBOL_GPL(ata_noop_dev_select); |
43727fbc | 6096 | EXPORT_SYMBOL_GPL(sata_print_link_status); |
436d34b3 | 6097 | EXPORT_SYMBOL_GPL(atapi_cmd_type); |
1da177e4 LT |
6098 | EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
6099 | EXPORT_SYMBOL_GPL(ata_tf_from_fis); | |
6357357c TH |
6100 | EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
6101 | EXPORT_SYMBOL_GPL(ata_unpack_xfermask); | |
6102 | EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); | |
6103 | EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); | |
6104 | EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); | |
6105 | EXPORT_SYMBOL_GPL(ata_mode_string); | |
6106 | EXPORT_SYMBOL_GPL(ata_id_xfermask); | |
1da177e4 | 6107 | EXPORT_SYMBOL_GPL(ata_port_start); |
04351821 | 6108 | EXPORT_SYMBOL_GPL(ata_do_set_mode); |
31cc23b3 | 6109 | EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
e46834cd | 6110 | EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
358f9a77 | 6111 | EXPORT_SYMBOL_GPL(ata_noop_irq_clear); |
1da177e4 | 6112 | EXPORT_SYMBOL_GPL(ata_port_probe); |
10305f0f | 6113 | EXPORT_SYMBOL_GPL(ata_dev_disable); |
3c567b7d | 6114 | EXPORT_SYMBOL_GPL(sata_set_spd); |
936fd732 TH |
6115 | EXPORT_SYMBOL_GPL(sata_link_debounce); |
6116 | EXPORT_SYMBOL_GPL(sata_link_resume); | |
cc0680a5 | 6117 | EXPORT_SYMBOL_GPL(sata_link_hardreset); |
2e9edbf8 JG |
6118 | EXPORT_SYMBOL_GPL(ata_dev_classify); |
6119 | EXPORT_SYMBOL_GPL(ata_dev_pair); | |
1da177e4 | 6120 | EXPORT_SYMBOL_GPL(ata_port_disable); |
67846b30 | 6121 | EXPORT_SYMBOL_GPL(ata_ratelimit); |
c22daff4 | 6122 | EXPORT_SYMBOL_GPL(ata_wait_register); |
1da177e4 LT |
6123 | EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
6124 | EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); | |
1da177e4 | 6125 | EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
83c47bcb | 6126 | EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
a6e6ce8e | 6127 | EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
34bf2170 TH |
6128 | EXPORT_SYMBOL_GPL(sata_scr_valid); |
6129 | EXPORT_SYMBOL_GPL(sata_scr_read); | |
6130 | EXPORT_SYMBOL_GPL(sata_scr_write); | |
6131 | EXPORT_SYMBOL_GPL(sata_scr_write_flush); | |
936fd732 TH |
6132 | EXPORT_SYMBOL_GPL(ata_link_online); |
6133 | EXPORT_SYMBOL_GPL(ata_link_offline); | |
6ffa01d8 | 6134 | #ifdef CONFIG_PM |
cca3974e JG |
6135 | EXPORT_SYMBOL_GPL(ata_host_suspend); |
6136 | EXPORT_SYMBOL_GPL(ata_host_resume); | |
6ffa01d8 | 6137 | #endif /* CONFIG_PM */ |
6a62a04d TH |
6138 | EXPORT_SYMBOL_GPL(ata_id_string); |
6139 | EXPORT_SYMBOL_GPL(ata_id_c_string); | |
1da177e4 LT |
6140 | EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
6141 | ||
1bc4ccff | 6142 | EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
6357357c | 6143 | EXPORT_SYMBOL_GPL(ata_timing_find_mode); |
452503f9 AC |
6144 | EXPORT_SYMBOL_GPL(ata_timing_compute); |
6145 | EXPORT_SYMBOL_GPL(ata_timing_merge); | |
a0f79b92 | 6146 | EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); |
452503f9 | 6147 | |
1da177e4 LT |
6148 | #ifdef CONFIG_PCI |
6149 | EXPORT_SYMBOL_GPL(pci_test_config_bits); | |
1da177e4 | 6150 | EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
6ffa01d8 | 6151 | #ifdef CONFIG_PM |
500530f6 TH |
6152 | EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
6153 | EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); | |
9b847548 JA |
6154 | EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
6155 | EXPORT_SYMBOL_GPL(ata_pci_device_resume); | |
6ffa01d8 | 6156 | #endif /* CONFIG_PM */ |
1da177e4 | 6157 | #endif /* CONFIG_PCI */ |
9b847548 | 6158 | |
31f88384 | 6159 | EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); |
3af9a77a TH |
6160 | EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); |
6161 | EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); | |
6162 | EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); | |
a1efdaba | 6163 | EXPORT_SYMBOL_GPL(sata_pmp_error_handler); |
3af9a77a | 6164 | |
b64bbc39 TH |
6165 | EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
6166 | EXPORT_SYMBOL_GPL(ata_ehi_push_desc); | |
6167 | EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); | |
cbcdd875 TH |
6168 | EXPORT_SYMBOL_GPL(ata_port_desc); |
6169 | #ifdef CONFIG_PCI | |
6170 | EXPORT_SYMBOL_GPL(ata_port_pbar_desc); | |
6171 | #endif /* CONFIG_PCI */ | |
7b70fc03 | 6172 | EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
dbd82616 | 6173 | EXPORT_SYMBOL_GPL(ata_link_abort); |
7b70fc03 | 6174 | EXPORT_SYMBOL_GPL(ata_port_abort); |
e3180499 | 6175 | EXPORT_SYMBOL_GPL(ata_port_freeze); |
7d77b247 | 6176 | EXPORT_SYMBOL_GPL(sata_async_notification); |
e3180499 TH |
6177 | EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
6178 | EXPORT_SYMBOL_GPL(ata_eh_thaw_port); | |
ece1d636 TH |
6179 | EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
6180 | EXPORT_SYMBOL_GPL(ata_eh_qc_retry); | |
022bdb07 | 6181 | EXPORT_SYMBOL_GPL(ata_do_eh); |
a1efdaba | 6182 | EXPORT_SYMBOL_GPL(ata_std_error_handler); |
be0d18df AC |
6183 | |
6184 | EXPORT_SYMBOL_GPL(ata_cable_40wire); | |
6185 | EXPORT_SYMBOL_GPL(ata_cable_80wire); | |
6186 | EXPORT_SYMBOL_GPL(ata_cable_unknown); | |
c88f90c3 | 6187 | EXPORT_SYMBOL_GPL(ata_cable_ignore); |
be0d18df | 6188 | EXPORT_SYMBOL_GPL(ata_cable_sata); |