1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * libata-core.c - helper library for ATA
4 *
5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
6 * Copyright 2003-2004 Jeff Garzik
7 *
8 * libata documentation is available via 'make {ps|pdf}docs',
9 * as Documentation/driver-api/libata.rst
10 *
11 * Hardware documentation available from http://www.t13.org/ and
12 * http://www.sata-io.org/
13 *
14 * Standards documents from:
15 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
16 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
17 * http://www.sata-io.org (SATA)
18 * http://www.compactflash.org (CF)
19 * http://www.qic.org (QIC157 - Tape and DSC)
20 * http://www.ce-ata.org (CE-ATA: not supported)
21 *
22 * libata is essentially a library of internal helper functions for
23 * low-level ATA host controller drivers. As such, the API/ABI is
24 * likely to change as new drivers are added and updated.
25 * Do not depend on ABI/API stability.
26 */
27
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
33 #include <linux/mm.h>
34 #include <linux/spinlock.h>
35 #include <linux/blkdev.h>
36 #include <linux/delay.h>
37 #include <linux/timer.h>
38 #include <linux/time.h>
39 #include <linux/interrupt.h>
40 #include <linux/completion.h>
41 #include <linux/suspend.h>
42 #include <linux/workqueue.h>
43 #include <linux/scatterlist.h>
44 #include <linux/io.h>
45 #include <linux/log2.h>
46 #include <linux/slab.h>
47 #include <linux/glob.h>
48 #include <scsi/scsi.h>
49 #include <scsi/scsi_cmnd.h>
50 #include <scsi/scsi_host.h>
51 #include <linux/libata.h>
52 #include <asm/byteorder.h>
53 #include <asm/unaligned.h>
54 #include <linux/cdrom.h>
55 #include <linux/ratelimit.h>
56 #include <linux/leds.h>
57 #include <linux/pm_runtime.h>
58 #include <linux/platform_device.h>
59 #include <asm/setup.h>
60
61 #define CREATE_TRACE_POINTS
62 #include <trace/events/libata.h>
63
64 #include "libata.h"
65 #include "libata-transport.h"
66
67 const struct ata_port_operations ata_base_port_ops = {
68 .prereset = ata_std_prereset,
69 .postreset = ata_std_postreset,
70 .error_handler = ata_std_error_handler,
71 .sched_eh = ata_std_sched_eh,
72 .end_eh = ata_std_end_eh,
73 };
74
75 const struct ata_port_operations sata_port_ops = {
76 .inherits = &ata_base_port_ops,
77
78 .qc_defer = ata_std_qc_defer,
79 .hardreset = sata_std_hardreset,
80 };
81 EXPORT_SYMBOL_GPL(sata_port_ops);
82
83 static unsigned int ata_dev_init_params(struct ata_device *dev,
84 u16 heads, u16 sectors);
85 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
86 static void ata_dev_xfermask(struct ata_device *dev);
87 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
88
89 atomic_t ata_print_id = ATOMIC_INIT(0);
90
91 #ifdef CONFIG_ATA_FORCE
92 struct ata_force_param {
93 const char *name;
94 u8 cbl;
95 u8 spd_limit;
96 unsigned int xfer_mask;
97 unsigned int horkage_on;
98 unsigned int horkage_off;
99 u16 lflags_on;
100 u16 lflags_off;
101 };
102
103 struct ata_force_ent {
104 int port;
105 int device;
106 struct ata_force_param param;
107 };
108
109 static struct ata_force_ent *ata_force_tbl;
110 static int ata_force_tbl_size;
111
112 static char ata_force_param_buf[COMMAND_LINE_SIZE] __initdata;
113 /* param_buf is thrown away after initialization, disallow read */
114 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
115 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/admin-guide/kernel-parameters.rst for details)");
116 #endif
117
118 static int atapi_enabled = 1;
119 module_param(atapi_enabled, int, 0444);
120 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
121
122 static int atapi_dmadir = 0;
123 module_param(atapi_dmadir, int, 0444);
124 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
125
126 int atapi_passthru16 = 1;
127 module_param(atapi_passthru16, int, 0444);
128 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
129
130 int libata_fua = 0;
131 module_param_named(fua, libata_fua, int, 0444);
132 MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
133
134 static int ata_ignore_hpa;
135 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
136 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
137
138 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
139 module_param_named(dma, libata_dma_mask, int, 0444);
140 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
141
142 static int ata_probe_timeout;
143 module_param(ata_probe_timeout, int, 0444);
144 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
145
146 int libata_noacpi = 0;
147 module_param_named(noacpi, libata_noacpi, int, 0444);
148 MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
149
150 int libata_allow_tpm = 0;
151 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
152 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
153
154 static int atapi_an;
155 module_param(atapi_an, int, 0444);
156 MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
157
158 MODULE_AUTHOR("Jeff Garzik");
159 MODULE_DESCRIPTION("Library module for ATA devices");
160 MODULE_LICENSE("GPL");
161 MODULE_VERSION(DRV_VERSION);
162
ata_dev_print_info(struct ata_device * dev)163 static inline bool ata_dev_print_info(struct ata_device *dev)
164 {
165 struct ata_eh_context *ehc = &dev->link->eh_context;
166
167 return ehc->i.flags & ATA_EHI_PRINTINFO;
168 }
169
ata_sstatus_online(u32 sstatus)170 static bool ata_sstatus_online(u32 sstatus)
171 {
172 return (sstatus & 0xf) == 0x3;
173 }
174
175 /**
176 * ata_link_next - link iteration helper
177 * @link: the previous link, NULL to start
178 * @ap: ATA port containing links to iterate
179 * @mode: iteration mode, one of ATA_LITER_*
180 *
181 * LOCKING:
182 * Host lock or EH context.
183 *
184 * RETURNS:
185 * Pointer to the next link.
186 */
ata_link_next(struct ata_link * link,struct ata_port * ap,enum ata_link_iter_mode mode)187 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
188 enum ata_link_iter_mode mode)
189 {
190 BUG_ON(mode != ATA_LITER_EDGE &&
191 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
192
193 /* NULL link indicates start of iteration */
194 if (!link)
195 switch (mode) {
196 case ATA_LITER_EDGE:
197 case ATA_LITER_PMP_FIRST:
198 if (sata_pmp_attached(ap))
199 return ap->pmp_link;
200 fallthrough;
201 case ATA_LITER_HOST_FIRST:
202 return &ap->link;
203 }
204
205 /* we just iterated over the host link, what's next? */
206 if (link == &ap->link)
207 switch (mode) {
208 case ATA_LITER_HOST_FIRST:
209 if (sata_pmp_attached(ap))
210 return ap->pmp_link;
211 fallthrough;
212 case ATA_LITER_PMP_FIRST:
213 if (unlikely(ap->slave_link))
214 return ap->slave_link;
215 fallthrough;
216 case ATA_LITER_EDGE:
217 return NULL;
218 }
219
220 /* slave_link excludes PMP */
221 if (unlikely(link == ap->slave_link))
222 return NULL;
223
224 /* we were over a PMP link */
225 if (++link < ap->pmp_link + ap->nr_pmp_links)
226 return link;
227
228 if (mode == ATA_LITER_PMP_FIRST)
229 return &ap->link;
230
231 return NULL;
232 }
233 EXPORT_SYMBOL_GPL(ata_link_next);
234
235 /**
236 * ata_dev_next - device iteration helper
237 * @dev: the previous device, NULL to start
238 * @link: ATA link containing devices to iterate
239 * @mode: iteration mode, one of ATA_DITER_*
240 *
241 * LOCKING:
242 * Host lock or EH context.
243 *
244 * RETURNS:
245 * Pointer to the next device.
246 */
ata_dev_next(struct ata_device * dev,struct ata_link * link,enum ata_dev_iter_mode mode)247 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
248 enum ata_dev_iter_mode mode)
249 {
250 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
251 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
252
253 /* NULL dev indicates start of iteration */
254 if (!dev)
255 switch (mode) {
256 case ATA_DITER_ENABLED:
257 case ATA_DITER_ALL:
258 dev = link->device;
259 goto check;
260 case ATA_DITER_ENABLED_REVERSE:
261 case ATA_DITER_ALL_REVERSE:
262 dev = link->device + ata_link_max_devices(link) - 1;
263 goto check;
264 }
265
266 next:
267 /* move to the next one */
268 switch (mode) {
269 case ATA_DITER_ENABLED:
270 case ATA_DITER_ALL:
271 if (++dev < link->device + ata_link_max_devices(link))
272 goto check;
273 return NULL;
274 case ATA_DITER_ENABLED_REVERSE:
275 case ATA_DITER_ALL_REVERSE:
276 if (--dev >= link->device)
277 goto check;
278 return NULL;
279 }
280
281 check:
282 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
283 !ata_dev_enabled(dev))
284 goto next;
285 return dev;
286 }
287 EXPORT_SYMBOL_GPL(ata_dev_next);
288
289 /**
290 * ata_dev_phys_link - find physical link for a device
291 * @dev: ATA device to look up physical link for
292 *
293 * Look up physical link which @dev is attached to. Note that
294 * this is different from @dev->link only when @dev is on slave
295 * link. For all other cases, it's the same as @dev->link.
296 *
297 * LOCKING:
298 * Don't care.
299 *
300 * RETURNS:
301 * Pointer to the found physical link.
302 */
ata_dev_phys_link(struct ata_device * dev)303 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
304 {
305 struct ata_port *ap = dev->link->ap;
306
307 if (!ap->slave_link)
308 return dev->link;
309 if (!dev->devno)
310 return &ap->link;
311 return ap->slave_link;
312 }
313
314 #ifdef CONFIG_ATA_FORCE
315 /**
316 * ata_force_cbl - force cable type according to libata.force
317 * @ap: ATA port of interest
318 *
319 * Force cable type according to libata.force and whine about it.
320 * The last entry which has matching port number is used, so it
321 * can be specified as part of device force parameters. For
322 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
323 * same effect.
324 *
325 * LOCKING:
326 * EH context.
327 */
ata_force_cbl(struct ata_port * ap)328 void ata_force_cbl(struct ata_port *ap)
329 {
330 int i;
331
332 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
333 const struct ata_force_ent *fe = &ata_force_tbl[i];
334
335 if (fe->port != -1 && fe->port != ap->print_id)
336 continue;
337
338 if (fe->param.cbl == ATA_CBL_NONE)
339 continue;
340
341 ap->cbl = fe->param.cbl;
342 ata_port_notice(ap, "FORCE: cable set to %s\n", fe->param.name);
343 return;
344 }
345 }
346
347 /**
348 * ata_force_link_limits - force link limits according to libata.force
349 * @link: ATA link of interest
350 *
351 * Force link flags and SATA spd limit according to libata.force
352 * and whine about it. When only the port part is specified
353 * (e.g. 1:), the limit applies to all links connected to both
354 * the host link and all fan-out ports connected via PMP. If the
355 * device part is specified as 0 (e.g. 1.00:), it specifies the
356 * first fan-out link not the host link. Device number 15 always
357 * points to the host link whether PMP is attached or not. If the
358 * controller has slave link, device number 16 points to it.
359 *
360 * LOCKING:
361 * EH context.
362 */
ata_force_link_limits(struct ata_link * link)363 static void ata_force_link_limits(struct ata_link *link)
364 {
365 bool did_spd = false;
366 int linkno = link->pmp;
367 int i;
368
369 if (ata_is_host_link(link))
370 linkno += 15;
371
372 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
373 const struct ata_force_ent *fe = &ata_force_tbl[i];
374
375 if (fe->port != -1 && fe->port != link->ap->print_id)
376 continue;
377
378 if (fe->device != -1 && fe->device != linkno)
379 continue;
380
381 /* only honor the first spd limit */
382 if (!did_spd && fe->param.spd_limit) {
383 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
384 ata_link_notice(link, "FORCE: PHY spd limit set to %s\n",
385 fe->param.name);
386 did_spd = true;
387 }
388
389 /* let lflags stack */
390 if (fe->param.lflags_on) {
391 link->flags |= fe->param.lflags_on;
392 ata_link_notice(link,
393 "FORCE: link flag 0x%x forced -> 0x%x\n",
394 fe->param.lflags_on, link->flags);
395 }
396 if (fe->param.lflags_off) {
397 link->flags &= ~fe->param.lflags_off;
398 ata_link_notice(link,
399 "FORCE: link flag 0x%x cleared -> 0x%x\n",
400 fe->param.lflags_off, link->flags);
401 }
402 }
403 }
404
405 /**
406 * ata_force_xfermask - force xfermask according to libata.force
407 * @dev: ATA device of interest
408 *
409 * Force xfer_mask according to libata.force and whine about it.
410 * For consistency with link selection, device number 15 selects
411 * the first device connected to the host link.
412 *
413 * LOCKING:
414 * EH context.
415 */
ata_force_xfermask(struct ata_device * dev)416 static void ata_force_xfermask(struct ata_device *dev)
417 {
418 int devno = dev->link->pmp + dev->devno;
419 int alt_devno = devno;
420 int i;
421
422 /* allow n.15/16 for devices attached to host port */
423 if (ata_is_host_link(dev->link))
424 alt_devno += 15;
425
426 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
427 const struct ata_force_ent *fe = &ata_force_tbl[i];
428 unsigned int pio_mask, mwdma_mask, udma_mask;
429
430 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
431 continue;
432
433 if (fe->device != -1 && fe->device != devno &&
434 fe->device != alt_devno)
435 continue;
436
437 if (!fe->param.xfer_mask)
438 continue;
439
440 ata_unpack_xfermask(fe->param.xfer_mask,
441 &pio_mask, &mwdma_mask, &udma_mask);
442 if (udma_mask)
443 dev->udma_mask = udma_mask;
444 else if (mwdma_mask) {
445 dev->udma_mask = 0;
446 dev->mwdma_mask = mwdma_mask;
447 } else {
448 dev->udma_mask = 0;
449 dev->mwdma_mask = 0;
450 dev->pio_mask = pio_mask;
451 }
452
453 ata_dev_notice(dev, "FORCE: xfer_mask set to %s\n",
454 fe->param.name);
455 return;
456 }
457 }
458
459 /**
460 * ata_force_horkage - force horkage according to libata.force
461 * @dev: ATA device of interest
462 *
463 * Force horkage according to libata.force and whine about it.
464 * For consistency with link selection, device number 15 selects
465 * the first device connected to the host link.
466 *
467 * LOCKING:
468 * EH context.
469 */
ata_force_horkage(struct ata_device * dev)470 static void ata_force_horkage(struct ata_device *dev)
471 {
472 int devno = dev->link->pmp + dev->devno;
473 int alt_devno = devno;
474 int i;
475
476 /* allow n.15/16 for devices attached to host port */
477 if (ata_is_host_link(dev->link))
478 alt_devno += 15;
479
480 for (i = 0; i < ata_force_tbl_size; i++) {
481 const struct ata_force_ent *fe = &ata_force_tbl[i];
482
483 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
484 continue;
485
486 if (fe->device != -1 && fe->device != devno &&
487 fe->device != alt_devno)
488 continue;
489
490 if (!(~dev->horkage & fe->param.horkage_on) &&
491 !(dev->horkage & fe->param.horkage_off))
492 continue;
493
494 dev->horkage |= fe->param.horkage_on;
495 dev->horkage &= ~fe->param.horkage_off;
496
497 ata_dev_notice(dev, "FORCE: horkage modified (%s)\n",
498 fe->param.name);
499 }
500 }
501 #else
ata_force_link_limits(struct ata_link * link)502 static inline void ata_force_link_limits(struct ata_link *link) { }
ata_force_xfermask(struct ata_device * dev)503 static inline void ata_force_xfermask(struct ata_device *dev) { }
ata_force_horkage(struct ata_device * dev)504 static inline void ata_force_horkage(struct ata_device *dev) { }
505 #endif
506
507 /**
508 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
509 * @opcode: SCSI opcode
510 *
511 * Determine ATAPI command type from @opcode.
512 *
513 * LOCKING:
514 * None.
515 *
516 * RETURNS:
517 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
518 */
atapi_cmd_type(u8 opcode)519 int atapi_cmd_type(u8 opcode)
520 {
521 switch (opcode) {
522 case GPCMD_READ_10:
523 case GPCMD_READ_12:
524 return ATAPI_READ;
525
526 case GPCMD_WRITE_10:
527 case GPCMD_WRITE_12:
528 case GPCMD_WRITE_AND_VERIFY_10:
529 return ATAPI_WRITE;
530
531 case GPCMD_READ_CD:
532 case GPCMD_READ_CD_MSF:
533 return ATAPI_READ_CD;
534
535 case ATA_16:
536 case ATA_12:
537 if (atapi_passthru16)
538 return ATAPI_PASS_THRU;
539 fallthrough;
540 default:
541 return ATAPI_MISC;
542 }
543 }
544 EXPORT_SYMBOL_GPL(atapi_cmd_type);
545
546 static const u8 ata_rw_cmds[] = {
547 /* pio multi */
548 ATA_CMD_READ_MULTI,
549 ATA_CMD_WRITE_MULTI,
550 ATA_CMD_READ_MULTI_EXT,
551 ATA_CMD_WRITE_MULTI_EXT,
552 0,
553 0,
554 0,
555 0,
556 /* pio */
557 ATA_CMD_PIO_READ,
558 ATA_CMD_PIO_WRITE,
559 ATA_CMD_PIO_READ_EXT,
560 ATA_CMD_PIO_WRITE_EXT,
561 0,
562 0,
563 0,
564 0,
565 /* dma */
566 ATA_CMD_READ,
567 ATA_CMD_WRITE,
568 ATA_CMD_READ_EXT,
569 ATA_CMD_WRITE_EXT,
570 0,
571 0,
572 0,
573 ATA_CMD_WRITE_FUA_EXT
574 };
575
576 /**
577 * ata_set_rwcmd_protocol - set taskfile r/w command and protocol
578 * @dev: target device for the taskfile
579 * @tf: taskfile to examine and configure
580 *
581 * Examine the device configuration and tf->flags to determine
582 * the proper read/write command and protocol to use for @tf.
583 *
584 * LOCKING:
585 * caller.
586 */
ata_set_rwcmd_protocol(struct ata_device * dev,struct ata_taskfile * tf)587 static bool ata_set_rwcmd_protocol(struct ata_device *dev,
588 struct ata_taskfile *tf)
589 {
590 u8 cmd;
591
592 int index, fua, lba48, write;
593
594 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
595 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
596 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
597
598 if (dev->flags & ATA_DFLAG_PIO) {
599 tf->protocol = ATA_PROT_PIO;
600 index = dev->multi_count ? 0 : 8;
601 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
602 /* Unable to use DMA due to host limitation */
603 tf->protocol = ATA_PROT_PIO;
604 index = dev->multi_count ? 0 : 8;
605 } else {
606 tf->protocol = ATA_PROT_DMA;
607 index = 16;
608 }
609
610 cmd = ata_rw_cmds[index + fua + lba48 + write];
611 if (!cmd)
612 return false;
613
614 tf->command = cmd;
615
616 return true;
617 }
618
619 /**
620 * ata_tf_read_block - Read block address from ATA taskfile
621 * @tf: ATA taskfile of interest
622 * @dev: ATA device @tf belongs to
623 *
624 * LOCKING:
625 * None.
626 *
627 * Read block address from @tf. This function can handle all
628 * three address formats - LBA, LBA48 and CHS. tf->protocol and
629 * flags select the address format to use.
630 *
631 * RETURNS:
632 * Block address read from @tf.
633 */
ata_tf_read_block(const struct ata_taskfile * tf,struct ata_device * dev)634 u64 ata_tf_read_block(const struct ata_taskfile *tf, struct ata_device *dev)
635 {
636 u64 block = 0;
637
638 if (tf->flags & ATA_TFLAG_LBA) {
639 if (tf->flags & ATA_TFLAG_LBA48) {
640 block |= (u64)tf->hob_lbah << 40;
641 block |= (u64)tf->hob_lbam << 32;
642 block |= (u64)tf->hob_lbal << 24;
643 } else
644 block |= (tf->device & 0xf) << 24;
645
646 block |= tf->lbah << 16;
647 block |= tf->lbam << 8;
648 block |= tf->lbal;
649 } else {
650 u32 cyl, head, sect;
651
652 cyl = tf->lbam | (tf->lbah << 8);
653 head = tf->device & 0xf;
654 sect = tf->lbal;
655
656 if (!sect) {
657 ata_dev_warn(dev,
658 "device reported invalid CHS sector 0\n");
659 return U64_MAX;
660 }
661
662 block = (cyl * dev->heads + head) * dev->sectors + sect - 1;
663 }
664
665 return block;
666 }
667
668 /*
669 * Set a taskfile command duration limit index.
670 */
ata_set_tf_cdl(struct ata_queued_cmd * qc,int cdl)671 static inline void ata_set_tf_cdl(struct ata_queued_cmd *qc, int cdl)
672 {
673 struct ata_taskfile *tf = &qc->tf;
674
675 if (tf->protocol == ATA_PROT_NCQ)
676 tf->auxiliary |= cdl;
677 else
678 tf->feature |= cdl;
679
680 /*
681 * Mark this command as having a CDL and request the result
682 * task file so that we can inspect the sense data available
683 * bit on completion.
684 */
685 qc->flags |= ATA_QCFLAG_HAS_CDL | ATA_QCFLAG_RESULT_TF;
686 }
687
688 /**
689 * ata_build_rw_tf - Build ATA taskfile for given read/write request
690 * @qc: Metadata associated with the taskfile to build
691 * @block: Block address
692 * @n_block: Number of blocks
693 * @tf_flags: RW/FUA etc...
694 * @cdl: Command duration limit index
695 * @class: IO priority class
696 *
697 * LOCKING:
698 * None.
699 *
700 * Build ATA taskfile for the command @qc for read/write request described
701 * by @block, @n_block, @tf_flags and @class.
702 *
703 * RETURNS:
704 *
705 * 0 on success, -ERANGE if the request is too large for @dev,
706 * -EINVAL if the request is invalid.
707 */
ata_build_rw_tf(struct ata_queued_cmd * qc,u64 block,u32 n_block,unsigned int tf_flags,int cdl,int class)708 int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block,
709 unsigned int tf_flags, int cdl, int class)
710 {
711 struct ata_taskfile *tf = &qc->tf;
712 struct ata_device *dev = qc->dev;
713
714 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
715 tf->flags |= tf_flags;
716
717 if (ata_ncq_enabled(dev)) {
718 /* yay, NCQ */
719 if (!lba_48_ok(block, n_block))
720 return -ERANGE;
721
722 tf->protocol = ATA_PROT_NCQ;
723 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
724
725 if (tf->flags & ATA_TFLAG_WRITE)
726 tf->command = ATA_CMD_FPDMA_WRITE;
727 else
728 tf->command = ATA_CMD_FPDMA_READ;
729
730 tf->nsect = qc->hw_tag << 3;
731 tf->hob_feature = (n_block >> 8) & 0xff;
732 tf->feature = n_block & 0xff;
733
734 tf->hob_lbah = (block >> 40) & 0xff;
735 tf->hob_lbam = (block >> 32) & 0xff;
736 tf->hob_lbal = (block >> 24) & 0xff;
737 tf->lbah = (block >> 16) & 0xff;
738 tf->lbam = (block >> 8) & 0xff;
739 tf->lbal = block & 0xff;
740
741 tf->device = ATA_LBA;
742 if (tf->flags & ATA_TFLAG_FUA)
743 tf->device |= 1 << 7;
744
745 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED &&
746 class == IOPRIO_CLASS_RT)
747 tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO;
748
749 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl)
750 ata_set_tf_cdl(qc, cdl);
751
752 } else if (dev->flags & ATA_DFLAG_LBA) {
753 tf->flags |= ATA_TFLAG_LBA;
754
755 if ((dev->flags & ATA_DFLAG_CDL_ENABLED) && cdl)
756 ata_set_tf_cdl(qc, cdl);
757
758 /* Both FUA writes and a CDL index require 48-bit commands */
759 if (!(tf->flags & ATA_TFLAG_FUA) &&
760 !(qc->flags & ATA_QCFLAG_HAS_CDL) &&
761 lba_28_ok(block, n_block)) {
762 /* use LBA28 */
763 tf->device |= (block >> 24) & 0xf;
764 } else if (lba_48_ok(block, n_block)) {
765 if (!(dev->flags & ATA_DFLAG_LBA48))
766 return -ERANGE;
767
768 /* use LBA48 */
769 tf->flags |= ATA_TFLAG_LBA48;
770
771 tf->hob_nsect = (n_block >> 8) & 0xff;
772
773 tf->hob_lbah = (block >> 40) & 0xff;
774 tf->hob_lbam = (block >> 32) & 0xff;
775 tf->hob_lbal = (block >> 24) & 0xff;
776 } else {
777 /* request too large even for LBA48 */
778 return -ERANGE;
779 }
780
781 if (unlikely(!ata_set_rwcmd_protocol(dev, tf)))
782 return -EINVAL;
783
784 tf->nsect = n_block & 0xff;
785
786 tf->lbah = (block >> 16) & 0xff;
787 tf->lbam = (block >> 8) & 0xff;
788 tf->lbal = block & 0xff;
789
790 tf->device |= ATA_LBA;
791 } else {
792 /* CHS */
793 u32 sect, head, cyl, track;
794
795 /* The request -may- be too large for CHS addressing. */
796 if (!lba_28_ok(block, n_block))
797 return -ERANGE;
798
799 if (unlikely(!ata_set_rwcmd_protocol(dev, tf)))
800 return -EINVAL;
801
802 /* Convert LBA to CHS */
803 track = (u32)block / dev->sectors;
804 cyl = track / dev->heads;
805 head = track % dev->heads;
806 sect = (u32)block % dev->sectors + 1;
807
808 /* Check whether the converted CHS can fit.
809 Cylinder: 0-65535
810 Head: 0-15
811 Sector: 1-255*/
812 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
813 return -ERANGE;
814
815 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
816 tf->lbal = sect;
817 tf->lbam = cyl;
818 tf->lbah = cyl >> 8;
819 tf->device |= head;
820 }
821
822 return 0;
823 }
824
825 /**
826 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
827 * @pio_mask: pio_mask
828 * @mwdma_mask: mwdma_mask
829 * @udma_mask: udma_mask
830 *
831 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
832 * unsigned int xfer_mask.
833 *
834 * LOCKING:
835 * None.
836 *
837 * RETURNS:
838 * Packed xfer_mask.
839 */
ata_pack_xfermask(unsigned int pio_mask,unsigned int mwdma_mask,unsigned int udma_mask)840 unsigned int ata_pack_xfermask(unsigned int pio_mask,
841 unsigned int mwdma_mask,
842 unsigned int udma_mask)
843 {
844 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
845 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
846 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
847 }
848 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
849
850 /**
851 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
852 * @xfer_mask: xfer_mask to unpack
853 * @pio_mask: resulting pio_mask
854 * @mwdma_mask: resulting mwdma_mask
855 * @udma_mask: resulting udma_mask
856 *
857 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
858 * Any NULL destination masks will be ignored.
859 */
ata_unpack_xfermask(unsigned int xfer_mask,unsigned int * pio_mask,unsigned int * mwdma_mask,unsigned int * udma_mask)860 void ata_unpack_xfermask(unsigned int xfer_mask, unsigned int *pio_mask,
861 unsigned int *mwdma_mask, unsigned int *udma_mask)
862 {
863 if (pio_mask)
864 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
865 if (mwdma_mask)
866 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
867 if (udma_mask)
868 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
869 }
870
871 static const struct ata_xfer_ent {
872 int shift, bits;
873 u8 base;
874 } ata_xfer_tbl[] = {
875 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
876 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
877 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
878 { -1, },
879 };
880
881 /**
882 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
883 * @xfer_mask: xfer_mask of interest
884 *
885 * Return matching XFER_* value for @xfer_mask. Only the highest
886 * bit of @xfer_mask is considered.
887 *
888 * LOCKING:
889 * None.
890 *
891 * RETURNS:
892 * Matching XFER_* value, 0xff if no match found.
893 */
ata_xfer_mask2mode(unsigned int xfer_mask)894 u8 ata_xfer_mask2mode(unsigned int xfer_mask)
895 {
896 int highbit = fls(xfer_mask) - 1;
897 const struct ata_xfer_ent *ent;
898
899 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
900 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
901 return ent->base + highbit - ent->shift;
902 return 0xff;
903 }
904 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
905
906 /**
907 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
908 * @xfer_mode: XFER_* of interest
909 *
910 * Return matching xfer_mask for @xfer_mode.
911 *
912 * LOCKING:
913 * None.
914 *
915 * RETURNS:
916 * Matching xfer_mask, 0 if no match found.
917 */
ata_xfer_mode2mask(u8 xfer_mode)918 unsigned int ata_xfer_mode2mask(u8 xfer_mode)
919 {
920 const struct ata_xfer_ent *ent;
921
922 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
923 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
924 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
925 & ~((1 << ent->shift) - 1);
926 return 0;
927 }
928 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
929
930 /**
931 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
932 * @xfer_mode: XFER_* of interest
933 *
934 * Return matching xfer_shift for @xfer_mode.
935 *
936 * LOCKING:
937 * None.
938 *
939 * RETURNS:
940 * Matching xfer_shift, -1 if no match found.
941 */
ata_xfer_mode2shift(u8 xfer_mode)942 int ata_xfer_mode2shift(u8 xfer_mode)
943 {
944 const struct ata_xfer_ent *ent;
945
946 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
947 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
948 return ent->shift;
949 return -1;
950 }
951 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
952
953 /**
954 * ata_mode_string - convert xfer_mask to string
955 * @xfer_mask: mask of bits supported; only highest bit counts.
956 *
957 * Determine string which represents the highest speed
958 * (highest bit in @modemask).
959 *
960 * LOCKING:
961 * None.
962 *
963 * RETURNS:
964 * Constant C string representing highest speed listed in
965 * @mode_mask, or the constant C string "<n/a>".
966 */
ata_mode_string(unsigned int xfer_mask)967 const char *ata_mode_string(unsigned int xfer_mask)
968 {
969 static const char * const xfer_mode_str[] = {
970 "PIO0",
971 "PIO1",
972 "PIO2",
973 "PIO3",
974 "PIO4",
975 "PIO5",
976 "PIO6",
977 "MWDMA0",
978 "MWDMA1",
979 "MWDMA2",
980 "MWDMA3",
981 "MWDMA4",
982 "UDMA/16",
983 "UDMA/25",
984 "UDMA/33",
985 "UDMA/44",
986 "UDMA/66",
987 "UDMA/100",
988 "UDMA/133",
989 "UDMA7",
990 };
991 int highbit;
992
993 highbit = fls(xfer_mask) - 1;
994 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
995 return xfer_mode_str[highbit];
996 return "<n/a>";
997 }
998 EXPORT_SYMBOL_GPL(ata_mode_string);
999
sata_spd_string(unsigned int spd)1000 const char *sata_spd_string(unsigned int spd)
1001 {
1002 static const char * const spd_str[] = {
1003 "1.5 Gbps",
1004 "3.0 Gbps",
1005 "6.0 Gbps",
1006 };
1007
1008 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1009 return "<unknown>";
1010 return spd_str[spd - 1];
1011 }
1012
1013 /**
1014 * ata_dev_classify - determine device type based on ATA-spec signature
1015 * @tf: ATA taskfile register set for device to be identified
1016 *
1017 * Determine from taskfile register contents whether a device is
1018 * ATA or ATAPI, as per "Signature and persistence" section
1019 * of ATA/PI spec (volume 1, sect 5.14).
1020 *
1021 * LOCKING:
1022 * None.
1023 *
1024 * RETURNS:
1025 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
1026 * %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
1027 */
ata_dev_classify(const struct ata_taskfile * tf)1028 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1029 {
1030 /* Apple's open source Darwin code hints that some devices only
1031 * put a proper signature into the LBA mid/high registers,
1032 * So, we only check those. It's sufficient for uniqueness.
1033 *
1034 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1035 * signatures for ATA and ATAPI devices attached on SerialATA,
1036 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1037 * spec has never mentioned about using different signatures
1038 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1039 * Multiplier specification began to use 0x69/0x96 to identify
1040 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1041 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1042 * 0x69/0x96 shortly and described them as reserved for
1043 * SerialATA.
1044 *
1045 * We follow the current spec and consider that 0x69/0x96
1046 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1047 * Unfortunately, WDC WD1600JS-62MHB5 (a hard drive) reports
1048 * SEMB signature. This is worked around in
1049 * ata_dev_read_id().
1050 */
1051 if (tf->lbam == 0 && tf->lbah == 0)
1052 return ATA_DEV_ATA;
1053
1054 if (tf->lbam == 0x14 && tf->lbah == 0xeb)
1055 return ATA_DEV_ATAPI;
1056
1057 if (tf->lbam == 0x69 && tf->lbah == 0x96)
1058 return ATA_DEV_PMP;
1059
1060 if (tf->lbam == 0x3c && tf->lbah == 0xc3)
1061 return ATA_DEV_SEMB;
1062
1063 if (tf->lbam == 0xcd && tf->lbah == 0xab)
1064 return ATA_DEV_ZAC;
1065
1066 return ATA_DEV_UNKNOWN;
1067 }
1068 EXPORT_SYMBOL_GPL(ata_dev_classify);
1069
1070 /**
1071 * ata_id_string - Convert IDENTIFY DEVICE page into string
1072 * @id: IDENTIFY DEVICE results we will examine
1073 * @s: string into which data is output
1074 * @ofs: offset into identify device page
1075 * @len: length of string to return. must be an even number.
1076 *
1077 * The strings in the IDENTIFY DEVICE page are broken up into
1078 * 16-bit chunks. Run through the string, and output each
1079 * 8-bit chunk linearly, regardless of platform.
1080 *
1081 * LOCKING:
1082 * caller.
1083 */
1084
ata_id_string(const u16 * id,unsigned char * s,unsigned int ofs,unsigned int len)1085 void ata_id_string(const u16 *id, unsigned char *s,
1086 unsigned int ofs, unsigned int len)
1087 {
1088 unsigned int c;
1089
1090 BUG_ON(len & 1);
1091
1092 while (len > 0) {
1093 c = id[ofs] >> 8;
1094 *s = c;
1095 s++;
1096
1097 c = id[ofs] & 0xff;
1098 *s = c;
1099 s++;
1100
1101 ofs++;
1102 len -= 2;
1103 }
1104 }
1105 EXPORT_SYMBOL_GPL(ata_id_string);
1106
1107 /**
1108 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1109 * @id: IDENTIFY DEVICE results we will examine
1110 * @s: string into which data is output
1111 * @ofs: offset into identify device page
1112 * @len: length of string to return. must be an odd number.
1113 *
1114 * This function is identical to ata_id_string except that it
1115 * trims trailing spaces and terminates the resulting string with
1116 * null. @len must be actual maximum length (even number) + 1.
1117 *
1118 * LOCKING:
1119 * caller.
1120 */
ata_id_c_string(const u16 * id,unsigned char * s,unsigned int ofs,unsigned int len)1121 void ata_id_c_string(const u16 *id, unsigned char *s,
1122 unsigned int ofs, unsigned int len)
1123 {
1124 unsigned char *p;
1125
1126 ata_id_string(id, s, ofs, len - 1);
1127
1128 p = s + strnlen(s, len - 1);
1129 while (p > s && p[-1] == ' ')
1130 p--;
1131 *p = '\0';
1132 }
1133 EXPORT_SYMBOL_GPL(ata_id_c_string);
1134
ata_id_n_sectors(const u16 * id)1135 static u64 ata_id_n_sectors(const u16 *id)
1136 {
1137 if (ata_id_has_lba(id)) {
1138 if (ata_id_has_lba48(id))
1139 return ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
1140
1141 return ata_id_u32(id, ATA_ID_LBA_CAPACITY);
1142 }
1143
1144 if (ata_id_current_chs_valid(id))
1145 return (u32)id[ATA_ID_CUR_CYLS] * (u32)id[ATA_ID_CUR_HEADS] *
1146 (u32)id[ATA_ID_CUR_SECTORS];
1147
1148 return (u32)id[ATA_ID_CYLS] * (u32)id[ATA_ID_HEADS] *
1149 (u32)id[ATA_ID_SECTORS];
1150 }
1151
ata_tf_to_lba48(const struct ata_taskfile * tf)1152 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1153 {
1154 u64 sectors = 0;
1155
1156 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1157 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1158 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1159 sectors |= (tf->lbah & 0xff) << 16;
1160 sectors |= (tf->lbam & 0xff) << 8;
1161 sectors |= (tf->lbal & 0xff);
1162
1163 return sectors;
1164 }
1165
ata_tf_to_lba(const struct ata_taskfile * tf)1166 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1167 {
1168 u64 sectors = 0;
1169
1170 sectors |= (tf->device & 0x0f) << 24;
1171 sectors |= (tf->lbah & 0xff) << 16;
1172 sectors |= (tf->lbam & 0xff) << 8;
1173 sectors |= (tf->lbal & 0xff);
1174
1175 return sectors;
1176 }
1177
1178 /**
1179 * ata_read_native_max_address - Read native max address
1180 * @dev: target device
1181 * @max_sectors: out parameter for the result native max address
1182 *
1183 * Perform an LBA48 or LBA28 native size query upon the device in
1184 * question.
1185 *
1186 * RETURNS:
1187 * 0 on success, -EACCES if command is aborted by the drive.
1188 * -EIO on other errors.
1189 */
ata_read_native_max_address(struct ata_device * dev,u64 * max_sectors)1190 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1191 {
1192 unsigned int err_mask;
1193 struct ata_taskfile tf;
1194 int lba48 = ata_id_has_lba48(dev->id);
1195
1196 ata_tf_init(dev, &tf);
1197
1198 /* always clear all address registers */
1199 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1200
1201 if (lba48) {
1202 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1203 tf.flags |= ATA_TFLAG_LBA48;
1204 } else
1205 tf.command = ATA_CMD_READ_NATIVE_MAX;
1206
1207 tf.protocol = ATA_PROT_NODATA;
1208 tf.device |= ATA_LBA;
1209
1210 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1211 if (err_mask) {
1212 ata_dev_warn(dev,
1213 "failed to read native max address (err_mask=0x%x)\n",
1214 err_mask);
1215 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED))
1216 return -EACCES;
1217 return -EIO;
1218 }
1219
1220 if (lba48)
1221 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1222 else
1223 *max_sectors = ata_tf_to_lba(&tf) + 1;
1224 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1225 (*max_sectors)--;
1226 return 0;
1227 }
1228
1229 /**
1230 * ata_set_max_sectors - Set max sectors
1231 * @dev: target device
1232 * @new_sectors: new max sectors value to set for the device
1233 *
1234 * Set max sectors of @dev to @new_sectors.
1235 *
1236 * RETURNS:
1237 * 0 on success, -EACCES if command is aborted or denied (due to
1238 * previous non-volatile SET_MAX) by the drive. -EIO on other
1239 * errors.
1240 */
ata_set_max_sectors(struct ata_device * dev,u64 new_sectors)1241 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1242 {
1243 unsigned int err_mask;
1244 struct ata_taskfile tf;
1245 int lba48 = ata_id_has_lba48(dev->id);
1246
1247 new_sectors--;
1248
1249 ata_tf_init(dev, &tf);
1250
1251 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1252
1253 if (lba48) {
1254 tf.command = ATA_CMD_SET_MAX_EXT;
1255 tf.flags |= ATA_TFLAG_LBA48;
1256
1257 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1258 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1259 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1260 } else {
1261 tf.command = ATA_CMD_SET_MAX;
1262
1263 tf.device |= (new_sectors >> 24) & 0xf;
1264 }
1265
1266 tf.protocol = ATA_PROT_NODATA;
1267 tf.device |= ATA_LBA;
1268
1269 tf.lbal = (new_sectors >> 0) & 0xff;
1270 tf.lbam = (new_sectors >> 8) & 0xff;
1271 tf.lbah = (new_sectors >> 16) & 0xff;
1272
1273 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1274 if (err_mask) {
1275 ata_dev_warn(dev,
1276 "failed to set max address (err_mask=0x%x)\n",
1277 err_mask);
1278 if (err_mask == AC_ERR_DEV &&
1279 (tf.error & (ATA_ABORTED | ATA_IDNF)))
1280 return -EACCES;
1281 return -EIO;
1282 }
1283
1284 return 0;
1285 }
1286
1287 /**
1288 * ata_hpa_resize - Resize a device with an HPA set
1289 * @dev: Device to resize
1290 *
1291 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1292 * it if required to the full size of the media. The caller must check
1293 * the drive has the HPA feature set enabled.
1294 *
1295 * RETURNS:
1296 * 0 on success, -errno on failure.
1297 */
ata_hpa_resize(struct ata_device * dev)1298 static int ata_hpa_resize(struct ata_device *dev)
1299 {
1300 bool print_info = ata_dev_print_info(dev);
1301 bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
1302 u64 sectors = ata_id_n_sectors(dev->id);
1303 u64 native_sectors;
1304 int rc;
1305
1306 /* do we need to do it? */
1307 if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||
1308 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1309 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1310 return 0;
1311
1312 /* read native max address */
1313 rc = ata_read_native_max_address(dev, &native_sectors);
1314 if (rc) {
1315 /* If device aborted the command or HPA isn't going to
1316 * be unlocked, skip HPA resizing.
1317 */
1318 if (rc == -EACCES || !unlock_hpa) {
1319 ata_dev_warn(dev,
1320 "HPA support seems broken, skipping HPA handling\n");
1321 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1322
1323 /* we can continue if device aborted the command */
1324 if (rc == -EACCES)
1325 rc = 0;
1326 }
1327
1328 return rc;
1329 }
1330 dev->n_native_sectors = native_sectors;
1331
1332 /* nothing to do? */
1333 if (native_sectors <= sectors || !unlock_hpa) {
1334 if (!print_info || native_sectors == sectors)
1335 return 0;
1336
1337 if (native_sectors > sectors)
1338 ata_dev_info(dev,
1339 "HPA detected: current %llu, native %llu\n",
1340 (unsigned long long)sectors,
1341 (unsigned long long)native_sectors);
1342 else if (native_sectors < sectors)
1343 ata_dev_warn(dev,
1344 "native sectors (%llu) is smaller than sectors (%llu)\n",
1345 (unsigned long long)native_sectors,
1346 (unsigned long long)sectors);
1347 return 0;
1348 }
1349
1350 /* let's unlock HPA */
1351 rc = ata_set_max_sectors(dev, native_sectors);
1352 if (rc == -EACCES) {
1353 /* if device aborted the command, skip HPA resizing */
1354 ata_dev_warn(dev,
1355 "device aborted resize (%llu -> %llu), skipping HPA handling\n",
1356 (unsigned long long)sectors,
1357 (unsigned long long)native_sectors);
1358 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1359 return 0;
1360 } else if (rc)
1361 return rc;
1362
1363 /* re-read IDENTIFY data */
1364 rc = ata_dev_reread_id(dev, 0);
1365 if (rc) {
1366 ata_dev_err(dev,
1367 "failed to re-read IDENTIFY data after HPA resizing\n");
1368 return rc;
1369 }
1370
1371 if (print_info) {
1372 u64 new_sectors = ata_id_n_sectors(dev->id);
1373 ata_dev_info(dev,
1374 "HPA unlocked: %llu -> %llu, native %llu\n",
1375 (unsigned long long)sectors,
1376 (unsigned long long)new_sectors,
1377 (unsigned long long)native_sectors);
1378 }
1379
1380 return 0;
1381 }
1382
1383 /**
1384 * ata_dump_id - IDENTIFY DEVICE info debugging output
1385 * @dev: device from which the information is fetched
1386 * @id: IDENTIFY DEVICE page to dump
1387 *
1388 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1389 * page.
1390 *
1391 * LOCKING:
1392 * caller.
1393 */
1394
ata_dump_id(struct ata_device * dev,const u16 * id)1395 static inline void ata_dump_id(struct ata_device *dev, const u16 *id)
1396 {
1397 ata_dev_dbg(dev,
1398 "49==0x%04x 53==0x%04x 63==0x%04x 64==0x%04x 75==0x%04x\n"
1399 "80==0x%04x 81==0x%04x 82==0x%04x 83==0x%04x 84==0x%04x\n"
1400 "88==0x%04x 93==0x%04x\n",
1401 id[49], id[53], id[63], id[64], id[75], id[80],
1402 id[81], id[82], id[83], id[84], id[88], id[93]);
1403 }
1404
1405 /**
1406 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1407 * @id: IDENTIFY data to compute xfer mask from
1408 *
1409 * Compute the xfermask for this device. This is not as trivial
1410 * as it seems if we must consider early devices correctly.
1411 *
1412 * FIXME: pre IDE drive timing (do we care ?).
1413 *
1414 * LOCKING:
1415 * None.
1416 *
1417 * RETURNS:
1418 * Computed xfermask
1419 */
ata_id_xfermask(const u16 * id)1420 unsigned int ata_id_xfermask(const u16 *id)
1421 {
1422 unsigned int pio_mask, mwdma_mask, udma_mask;
1423
1424 /* Usual case. Word 53 indicates word 64 is valid */
1425 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1426 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1427 pio_mask <<= 3;
1428 pio_mask |= 0x7;
1429 } else {
1430 /* If word 64 isn't valid then Word 51 high byte holds
1431 * the PIO timing number for the maximum. Turn it into
1432 * a mask.
1433 */
1434 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1435 if (mode < 5) /* Valid PIO range */
1436 pio_mask = (2 << mode) - 1;
1437 else
1438 pio_mask = 1;
1439
1440 /* But wait.. there's more. Design your standards by
1441 * committee and you too can get a free iordy field to
1442 * process. However it is the speeds not the modes that
1443 * are supported... Note drivers using the timing API
1444 * will get this right anyway
1445 */
1446 }
1447
1448 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1449
1450 if (ata_id_is_cfa(id)) {
1451 /*
1452 * Process compact flash extended modes
1453 */
1454 int pio = (id[ATA_ID_CFA_MODES] >> 0) & 0x7;
1455 int dma = (id[ATA_ID_CFA_MODES] >> 3) & 0x7;
1456
1457 if (pio)
1458 pio_mask |= (1 << 5);
1459 if (pio > 1)
1460 pio_mask |= (1 << 6);
1461 if (dma)
1462 mwdma_mask |= (1 << 3);
1463 if (dma > 1)
1464 mwdma_mask |= (1 << 4);
1465 }
1466
1467 udma_mask = 0;
1468 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1469 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1470
1471 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1472 }
1473 EXPORT_SYMBOL_GPL(ata_id_xfermask);
1474
ata_qc_complete_internal(struct ata_queued_cmd * qc)1475 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1476 {
1477 struct completion *waiting = qc->private_data;
1478
1479 complete(waiting);
1480 }
1481
1482 /**
1483 * ata_exec_internal - execute libata internal command
1484 * @dev: Device to which the command is sent
1485 * @tf: Taskfile registers for the command and the result
1486 * @cdb: CDB for packet command
1487 * @dma_dir: Data transfer direction of the command
1488 * @buf: Data buffer of the command
1489 * @buflen: Length of data buffer
1490 * @timeout: Timeout in msecs (0 for default)
1491 *
1492 * Executes libata internal command with timeout. @tf contains
1493 * the command on entry and the result on return. Timeout and error
1494 * conditions are reported via the return value. No recovery action
1495 * is taken after a command times out. It is the caller's duty to
1496 * clean up after timeout.
1497 *
1498 * LOCKING:
1499 * None. Should be called with kernel context, might sleep.
1500 *
1501 * RETURNS:
1502 * Zero on success, AC_ERR_* mask on failure
1503 */
ata_exec_internal(struct ata_device * dev,struct ata_taskfile * tf,const u8 * cdb,enum dma_data_direction dma_dir,void * buf,unsigned int buflen,unsigned int timeout)1504 unsigned int ata_exec_internal(struct ata_device *dev, struct ata_taskfile *tf,
1505 const u8 *cdb, enum dma_data_direction dma_dir,
1506 void *buf, unsigned int buflen,
1507 unsigned int timeout)
1508 {
1509 struct ata_link *link = dev->link;
1510 struct ata_port *ap = link->ap;
1511 u8 command = tf->command;
1512 struct ata_queued_cmd *qc;
1513 struct scatterlist sgl;
1514 unsigned int preempted_tag;
1515 u32 preempted_sactive;
1516 u64 preempted_qc_active;
1517 int preempted_nr_active_links;
1518 bool auto_timeout = false;
1519 DECLARE_COMPLETION_ONSTACK(wait);
1520 unsigned long flags;
1521 unsigned int err_mask;
1522 int rc;
1523
1524 if (WARN_ON(dma_dir != DMA_NONE && !buf))
1525 return AC_ERR_INVALID;
1526
1527 spin_lock_irqsave(ap->lock, flags);
1528
1529 /* No internal command while frozen */
1530 if (ata_port_is_frozen(ap)) {
1531 spin_unlock_irqrestore(ap->lock, flags);
1532 return AC_ERR_SYSTEM;
1533 }
1534
1535 /* Initialize internal qc */
1536 qc = __ata_qc_from_tag(ap, ATA_TAG_INTERNAL);
1537
1538 qc->tag = ATA_TAG_INTERNAL;
1539 qc->hw_tag = 0;
1540 qc->scsicmd = NULL;
1541 qc->ap = ap;
1542 qc->dev = dev;
1543 ata_qc_reinit(qc);
1544
1545 preempted_tag = link->active_tag;
1546 preempted_sactive = link->sactive;
1547 preempted_qc_active = ap->qc_active;
1548 preempted_nr_active_links = ap->nr_active_links;
1549 link->active_tag = ATA_TAG_POISON;
1550 link->sactive = 0;
1551 ap->qc_active = 0;
1552 ap->nr_active_links = 0;
1553
1554 /* Prepare and issue qc */
1555 qc->tf = *tf;
1556 if (cdb)
1557 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1558
1559 /* Some SATA bridges need us to indicate data xfer direction */
1560 if (tf->protocol == ATAPI_PROT_DMA && (dev->flags & ATA_DFLAG_DMADIR) &&
1561 dma_dir == DMA_FROM_DEVICE)
1562 qc->tf.feature |= ATAPI_DMADIR;
1563
1564 qc->flags |= ATA_QCFLAG_RESULT_TF;
1565 qc->dma_dir = dma_dir;
1566 if (dma_dir != DMA_NONE) {
1567 sg_init_one(&sgl, buf, buflen);
1568 ata_sg_init(qc, &sgl, 1);
1569 qc->nbytes = buflen;
1570 }
1571
1572 qc->private_data = &wait;
1573 qc->complete_fn = ata_qc_complete_internal;
1574
1575 ata_qc_issue(qc);
1576
1577 spin_unlock_irqrestore(ap->lock, flags);
1578
1579 if (!timeout) {
1580 if (ata_probe_timeout) {
1581 timeout = ata_probe_timeout * 1000;
1582 } else {
1583 timeout = ata_internal_cmd_timeout(dev, command);
1584 auto_timeout = true;
1585 }
1586 }
1587
1588 ata_eh_release(ap);
1589
1590 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1591
1592 ata_eh_acquire(ap);
1593
1594 ata_sff_flush_pio_task(ap);
1595
1596 if (!rc) {
1597 /*
1598 * We are racing with irq here. If we lose, the following test
1599 * prevents us from completing the qc twice. If we win, the port
1600 * is frozen and will be cleaned up by ->post_internal_cmd().
1601 */
1602 spin_lock_irqsave(ap->lock, flags);
1603 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1604 qc->err_mask |= AC_ERR_TIMEOUT;
1605 ata_port_freeze(ap);
1606 ata_dev_warn(dev, "qc timeout after %u msecs (cmd 0x%x)\n",
1607 timeout, command);
1608 }
1609 spin_unlock_irqrestore(ap->lock, flags);
1610 }
1611
1612 if (ap->ops->post_internal_cmd)
1613 ap->ops->post_internal_cmd(qc);
1614
1615 /* Perform minimal error analysis */
1616 if (qc->flags & ATA_QCFLAG_EH) {
1617 if (qc->result_tf.status & (ATA_ERR | ATA_DF))
1618 qc->err_mask |= AC_ERR_DEV;
1619
1620 if (!qc->err_mask)
1621 qc->err_mask |= AC_ERR_OTHER;
1622
1623 if (qc->err_mask & ~AC_ERR_OTHER)
1624 qc->err_mask &= ~AC_ERR_OTHER;
1625 } else if (qc->tf.command == ATA_CMD_REQ_SENSE_DATA) {
1626 qc->result_tf.status |= ATA_SENSE;
1627 }
1628
1629 /* Finish up */
1630 spin_lock_irqsave(ap->lock, flags);
1631
1632 *tf = qc->result_tf;
1633 err_mask = qc->err_mask;
1634
1635 ata_qc_free(qc);
1636 link->active_tag = preempted_tag;
1637 link->sactive = preempted_sactive;
1638 ap->qc_active = preempted_qc_active;
1639 ap->nr_active_links = preempted_nr_active_links;
1640
1641 spin_unlock_irqrestore(ap->lock, flags);
1642
1643 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1644 ata_internal_cmd_timed_out(dev, command);
1645
1646 return err_mask;
1647 }
1648
1649 /**
1650 * ata_pio_need_iordy - check if iordy needed
1651 * @adev: ATA device
1652 *
1653 * Check if the current speed of the device requires IORDY. Used
1654 * by various controllers for chip configuration.
1655 */
ata_pio_need_iordy(const struct ata_device * adev)1656 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1657 {
1658 /* Don't set IORDY if we're preparing for reset. IORDY may
1659 * lead to controller lock up on certain controllers if the
1660 * port is not occupied. See bko#11703 for details.
1661 */
1662 if (adev->link->ap->pflags & ATA_PFLAG_RESETTING)
1663 return 0;
1664 /* Controller doesn't support IORDY. Probably a pointless
1665 * check as the caller should know this.
1666 */
1667 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1668 return 0;
1669 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1670 if (ata_id_is_cfa(adev->id)
1671 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
1672 return 0;
1673 /* PIO3 and higher it is mandatory */
1674 if (adev->pio_mode > XFER_PIO_2)
1675 return 1;
1676 /* We turn it on when possible */
1677 if (ata_id_has_iordy(adev->id))
1678 return 1;
1679 return 0;
1680 }
1681 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
1682
1683 /**
1684 * ata_pio_mask_no_iordy - Return the non IORDY mask
1685 * @adev: ATA device
1686 *
1687 * Compute the highest mode possible if we are not using iordy. Return
1688 * -1 if no iordy mode is available.
1689 */
ata_pio_mask_no_iordy(const struct ata_device * adev)1690 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
1691 {
1692 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1693 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
1694 u16 pio = adev->id[ATA_ID_EIDE_PIO];
1695 /* Is the speed faster than the drive allows non IORDY ? */
1696 if (pio) {
1697 /* This is cycle times not frequency - watch the logic! */
1698 if (pio > 240) /* PIO2 is 240nS per cycle */
1699 return 3 << ATA_SHIFT_PIO;
1700 return 7 << ATA_SHIFT_PIO;
1701 }
1702 }
1703 return 3 << ATA_SHIFT_PIO;
1704 }
1705
1706 /**
1707 * ata_do_dev_read_id - default ID read method
1708 * @dev: device
1709 * @tf: proposed taskfile
1710 * @id: data buffer
1711 *
1712 * Issue the identify taskfile and hand back the buffer containing
1713 * identify data. For some RAID controllers and for pre ATA devices
1714 * this function is wrapped or replaced by the driver
1715 */
ata_do_dev_read_id(struct ata_device * dev,struct ata_taskfile * tf,__le16 * id)1716 unsigned int ata_do_dev_read_id(struct ata_device *dev,
1717 struct ata_taskfile *tf, __le16 *id)
1718 {
1719 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
1720 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
1721 }
1722 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
1723
1724 /**
1725 * ata_dev_read_id - Read ID data from the specified device
1726 * @dev: target device
1727 * @p_class: pointer to class of the target device (may be changed)
1728 * @flags: ATA_READID_* flags
1729 * @id: buffer to read IDENTIFY data into
1730 *
1731 * Read ID data from the specified device. ATA_CMD_ID_ATA is
1732 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
1733 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
1734 * for pre-ATA4 drives.
1735 *
1736 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
1737 * now we abort if we hit that case.
1738 *
1739 * LOCKING:
1740 * Kernel thread context (may sleep)
1741 *
1742 * RETURNS:
1743 * 0 on success, -errno otherwise.
1744 */
ata_dev_read_id(struct ata_device * dev,unsigned int * p_class,unsigned int flags,u16 * id)1745 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
1746 unsigned int flags, u16 *id)
1747 {
1748 struct ata_port *ap = dev->link->ap;
1749 unsigned int class = *p_class;
1750 struct ata_taskfile tf;
1751 unsigned int err_mask = 0;
1752 const char *reason;
1753 bool is_semb = class == ATA_DEV_SEMB;
1754 int may_fallback = 1, tried_spinup = 0;
1755 int rc;
1756
1757 retry:
1758 ata_tf_init(dev, &tf);
1759
1760 switch (class) {
1761 case ATA_DEV_SEMB:
1762 class = ATA_DEV_ATA; /* some hard drives report SEMB sig */
1763 fallthrough;
1764 case ATA_DEV_ATA:
1765 case ATA_DEV_ZAC:
1766 tf.command = ATA_CMD_ID_ATA;
1767 break;
1768 case ATA_DEV_ATAPI:
1769 tf.command = ATA_CMD_ID_ATAPI;
1770 break;
1771 default:
1772 rc = -ENODEV;
1773 reason = "unsupported class";
1774 goto err_out;
1775 }
1776
1777 tf.protocol = ATA_PROT_PIO;
1778
1779 /* Some devices choke if TF registers contain garbage. Make
1780 * sure those are properly initialized.
1781 */
1782 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1783
1784 /* Device presence detection is unreliable on some
1785 * controllers. Always poll IDENTIFY if available.
1786 */
1787 tf.flags |= ATA_TFLAG_POLLING;
1788
1789 if (ap->ops->read_id)
1790 err_mask = ap->ops->read_id(dev, &tf, (__le16 *)id);
1791 else
1792 err_mask = ata_do_dev_read_id(dev, &tf, (__le16 *)id);
1793
1794 if (err_mask) {
1795 if (err_mask & AC_ERR_NODEV_HINT) {
1796 ata_dev_dbg(dev, "NODEV after polling detection\n");
1797 return -ENOENT;
1798 }
1799
1800 if (is_semb) {
1801 ata_dev_info(dev,
1802 "IDENTIFY failed on device w/ SEMB sig, disabled\n");
1803 /* SEMB is not supported yet */
1804 *p_class = ATA_DEV_SEMB_UNSUP;
1805 return 0;
1806 }
1807
1808 if ((err_mask == AC_ERR_DEV) && (tf.error & ATA_ABORTED)) {
1809 /* Device or controller might have reported
1810 * the wrong device class. Give a shot at the
1811 * other IDENTIFY if the current one is
1812 * aborted by the device.
1813 */
1814 if (may_fallback) {
1815 may_fallback = 0;
1816
1817 if (class == ATA_DEV_ATA)
1818 class = ATA_DEV_ATAPI;
1819 else
1820 class = ATA_DEV_ATA;
1821 goto retry;
1822 }
1823
1824 /* Control reaches here iff the device aborted
1825 * both flavors of IDENTIFYs which happens
1826 * sometimes with phantom devices.
1827 */
1828 ata_dev_dbg(dev,
1829 "both IDENTIFYs aborted, assuming NODEV\n");
1830 return -ENOENT;
1831 }
1832
1833 rc = -EIO;
1834 reason = "I/O error";
1835 goto err_out;
1836 }
1837
1838 if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
1839 ata_dev_info(dev, "dumping IDENTIFY data, "
1840 "class=%d may_fallback=%d tried_spinup=%d\n",
1841 class, may_fallback, tried_spinup);
1842 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET,
1843 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
1844 }
1845
1846 /* Falling back doesn't make sense if ID data was read
1847 * successfully at least once.
1848 */
1849 may_fallback = 0;
1850
1851 swap_buf_le16(id, ATA_ID_WORDS);
1852
1853 /* sanity check */
1854 rc = -EINVAL;
1855 reason = "device reports invalid type";
1856
1857 if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
1858 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
1859 goto err_out;
1860 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
1861 ata_id_is_ata(id)) {
1862 ata_dev_dbg(dev,
1863 "host indicates ignore ATA devices, ignored\n");
1864 return -ENOENT;
1865 }
1866 } else {
1867 if (ata_id_is_ata(id))
1868 goto err_out;
1869 }
1870
1871 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
1872 tried_spinup = 1;
1873 /*
1874 * Drive powered-up in standby mode, and requires a specific
1875 * SET_FEATURES spin-up subcommand before it will accept
1876 * anything other than the original IDENTIFY command.
1877 */
1878 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
1879 if (err_mask && id[2] != 0x738c) {
1880 rc = -EIO;
1881 reason = "SPINUP failed";
1882 goto err_out;
1883 }
1884 /*
1885 * If the drive initially returned incomplete IDENTIFY info,
1886 * we now must reissue the IDENTIFY command.
1887 */
1888 if (id[2] == 0x37c8)
1889 goto retry;
1890 }
1891
1892 if ((flags & ATA_READID_POSTRESET) &&
1893 (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
1894 /*
1895 * The exact sequence expected by certain pre-ATA4 drives is:
1896 * SRST RESET
1897 * IDENTIFY (optional in early ATA)
1898 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
1899 * anything else..
1900 * Some drives were very specific about that exact sequence.
1901 *
1902 * Note that ATA4 says lba is mandatory so the second check
1903 * should never trigger.
1904 */
1905 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
1906 err_mask = ata_dev_init_params(dev, id[3], id[6]);
1907 if (err_mask) {
1908 rc = -EIO;
1909 reason = "INIT_DEV_PARAMS failed";
1910 goto err_out;
1911 }
1912
1913 /* current CHS translation info (id[53-58]) might be
1914 * changed. reread the identify device info.
1915 */
1916 flags &= ~ATA_READID_POSTRESET;
1917 goto retry;
1918 }
1919 }
1920
1921 *p_class = class;
1922
1923 return 0;
1924
1925 err_out:
1926 ata_dev_warn(dev, "failed to IDENTIFY (%s, err_mask=0x%x)\n",
1927 reason, err_mask);
1928 return rc;
1929 }
1930
ata_dev_power_init_tf(struct ata_device * dev,struct ata_taskfile * tf,bool set_active)1931 bool ata_dev_power_init_tf(struct ata_device *dev, struct ata_taskfile *tf,
1932 bool set_active)
1933 {
1934 /* Only applies to ATA and ZAC devices */
1935 if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC)
1936 return false;
1937
1938 ata_tf_init(dev, tf);
1939 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1940 tf->protocol = ATA_PROT_NODATA;
1941
1942 if (set_active) {
1943 /* VERIFY for 1 sector at lba=0 */
1944 tf->command = ATA_CMD_VERIFY;
1945 tf->nsect = 1;
1946 if (dev->flags & ATA_DFLAG_LBA) {
1947 tf->flags |= ATA_TFLAG_LBA;
1948 tf->device |= ATA_LBA;
1949 } else {
1950 /* CHS */
1951 tf->lbal = 0x1; /* sect */
1952 }
1953 } else {
1954 tf->command = ATA_CMD_STANDBYNOW1;
1955 }
1956
1957 return true;
1958 }
1959
ata_dev_power_is_active(struct ata_device * dev)1960 static bool ata_dev_power_is_active(struct ata_device *dev)
1961 {
1962 struct ata_taskfile tf;
1963 unsigned int err_mask;
1964
1965 ata_tf_init(dev, &tf);
1966 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1967 tf.protocol = ATA_PROT_NODATA;
1968 tf.command = ATA_CMD_CHK_POWER;
1969
1970 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1971 if (err_mask) {
1972 ata_dev_err(dev, "Check power mode failed (err_mask=0x%x)\n",
1973 err_mask);
1974 /*
1975 * Assume we are in standby mode so that we always force a
1976 * spinup in ata_dev_power_set_active().
1977 */
1978 return false;
1979 }
1980
1981 ata_dev_dbg(dev, "Power mode: 0x%02x\n", tf.nsect);
1982
1983 /* Active or idle */
1984 return tf.nsect == 0xff;
1985 }
1986
1987 /**
1988 * ata_dev_power_set_standby - Set a device power mode to standby
1989 * @dev: target device
1990 *
1991 * Issue a STANDBY IMMEDIATE command to set a device power mode to standby.
1992 * For an HDD device, this spins down the disks.
1993 *
1994 * LOCKING:
1995 * Kernel thread context (may sleep).
1996 */
ata_dev_power_set_standby(struct ata_device * dev)1997 void ata_dev_power_set_standby(struct ata_device *dev)
1998 {
1999 unsigned long ap_flags = dev->link->ap->flags;
2000 struct ata_taskfile tf;
2001 unsigned int err_mask;
2002
2003 /* If the device is already sleeping or in standby, do nothing. */
2004 if ((dev->flags & ATA_DFLAG_SLEEPING) ||
2005 !ata_dev_power_is_active(dev))
2006 return;
2007
2008 /*
2009 * Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5)
2010 * causing some drives to spin up and down again. For these, do nothing
2011 * if we are being called on shutdown.
2012 */
2013 if ((ap_flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
2014 system_state == SYSTEM_POWER_OFF)
2015 return;
2016
2017 if ((ap_flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
2018 system_entering_hibernation())
2019 return;
2020
2021 /* Issue STANDBY IMMEDIATE command only if supported by the device */
2022 if (!ata_dev_power_init_tf(dev, &tf, false))
2023 return;
2024
2025 ata_dev_notice(dev, "Entering standby power mode\n");
2026
2027 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
2028 if (err_mask)
2029 ata_dev_err(dev, "STANDBY IMMEDIATE failed (err_mask=0x%x)\n",
2030 err_mask);
2031 }
2032
2033 /**
2034 * ata_dev_power_set_active - Set a device power mode to active
2035 * @dev: target device
2036 *
2037 * Issue a VERIFY command to enter to ensure that the device is in the
2038 * active power mode. For a spun-down HDD (standby or idle power mode),
2039 * the VERIFY command will complete after the disk spins up.
2040 *
2041 * LOCKING:
2042 * Kernel thread context (may sleep).
2043 */
ata_dev_power_set_active(struct ata_device * dev)2044 void ata_dev_power_set_active(struct ata_device *dev)
2045 {
2046 struct ata_taskfile tf;
2047 unsigned int err_mask;
2048
2049 /*
2050 * Issue READ VERIFY SECTORS command for 1 sector at lba=0 only
2051 * if supported by the device.
2052 */
2053 if (!ata_dev_power_init_tf(dev, &tf, true))
2054 return;
2055
2056 /*
2057 * Check the device power state & condition and force a spinup with
2058 * VERIFY command only if the drive is not already ACTIVE or IDLE.
2059 */
2060 if (ata_dev_power_is_active(dev))
2061 return;
2062
2063 ata_dev_notice(dev, "Entering active power mode\n");
2064
2065 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
2066 if (err_mask)
2067 ata_dev_err(dev, "VERIFY failed (err_mask=0x%x)\n",
2068 err_mask);
2069 }
2070
2071 /**
2072 * ata_read_log_page - read a specific log page
2073 * @dev: target device
2074 * @log: log to read
2075 * @page: page to read
2076 * @buf: buffer to store read page
2077 * @sectors: number of sectors to read
2078 *
2079 * Read log page using READ_LOG_EXT command.
2080 *
2081 * LOCKING:
2082 * Kernel thread context (may sleep).
2083 *
2084 * RETURNS:
2085 * 0 on success, AC_ERR_* mask otherwise.
2086 */
ata_read_log_page(struct ata_device * dev,u8 log,u8 page,void * buf,unsigned int sectors)2087 unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
2088 u8 page, void *buf, unsigned int sectors)
2089 {
2090 unsigned long ap_flags = dev->link->ap->flags;
2091 struct ata_taskfile tf;
2092 unsigned int err_mask;
2093 bool dma = false;
2094
2095 ata_dev_dbg(dev, "read log page - log 0x%x, page 0x%x\n", log, page);
2096
2097 /*
2098 * Return error without actually issuing the command on controllers
2099 * which e.g. lockup on a read log page.
2100 */
2101 if (ap_flags & ATA_FLAG_NO_LOG_PAGE)
2102 return AC_ERR_DEV;
2103
2104 retry:
2105 ata_tf_init(dev, &tf);
2106 if (ata_dma_enabled(dev) && ata_id_has_read_log_dma_ext(dev->id) &&
2107 !(dev->horkage & ATA_HORKAGE_NO_DMA_LOG)) {
2108 tf.command = ATA_CMD_READ_LOG_DMA_EXT;
2109 tf.protocol = ATA_PROT_DMA;
2110 dma = true;
2111 } else {
2112 tf.command = ATA_CMD_READ_LOG_EXT;
2113 tf.protocol = ATA_PROT_PIO;
2114 dma = false;
2115 }
2116 tf.lbal = log;
2117 tf.lbam = page;
2118 tf.nsect = sectors;
2119 tf.hob_nsect = sectors >> 8;
2120 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_LBA48 | ATA_TFLAG_DEVICE;
2121
2122 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE,
2123 buf, sectors * ATA_SECT_SIZE, 0);
2124
2125 if (err_mask) {
2126 if (dma) {
2127 dev->horkage |= ATA_HORKAGE_NO_DMA_LOG;
2128 if (!ata_port_is_frozen(dev->link->ap))
2129 goto retry;
2130 }
2131 ata_dev_err(dev,
2132 "Read log 0x%02x page 0x%02x failed, Emask 0x%x\n",
2133 (unsigned int)log, (unsigned int)page, err_mask);
2134 }
2135
2136 return err_mask;
2137 }
2138
ata_log_supported(struct ata_device * dev,u8 log)2139 static int ata_log_supported(struct ata_device *dev, u8 log)
2140 {
2141 struct ata_port *ap = dev->link->ap;
2142
2143 if (dev->horkage & ATA_HORKAGE_NO_LOG_DIR)
2144 return 0;
2145
2146 if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1))
2147 return 0;
2148 return get_unaligned_le16(&ap->sector_buf[log * 2]);
2149 }
2150
ata_identify_page_supported(struct ata_device * dev,u8 page)2151 static bool ata_identify_page_supported(struct ata_device *dev, u8 page)
2152 {
2153 struct ata_port *ap = dev->link->ap;
2154 unsigned int err, i;
2155
2156 if (dev->horkage & ATA_HORKAGE_NO_ID_DEV_LOG)
2157 return false;
2158
2159 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE)) {
2160 /*
2161 * IDENTIFY DEVICE data log is defined as mandatory starting
2162 * with ACS-3 (ATA version 10). Warn about the missing log
2163 * for drives which implement this ATA level or above.
2164 */
2165 if (ata_id_major_version(dev->id) >= 10)
2166 ata_dev_warn(dev,
2167 "ATA Identify Device Log not supported\n");
2168 dev->horkage |= ATA_HORKAGE_NO_ID_DEV_LOG;
2169 return false;
2170 }
2171
2172 /*
2173 * Read IDENTIFY DEVICE data log, page 0, to figure out if the page is
2174 * supported.
2175 */
2176 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, 0, ap->sector_buf,
2177 1);
2178 if (err)
2179 return false;
2180
2181 for (i = 0; i < ap->sector_buf[8]; i++) {
2182 if (ap->sector_buf[9 + i] == page)
2183 return true;
2184 }
2185
2186 return false;
2187 }
2188
ata_do_link_spd_horkage(struct ata_device * dev)2189 static int ata_do_link_spd_horkage(struct ata_device *dev)
2190 {
2191 struct ata_link *plink = ata_dev_phys_link(dev);
2192 u32 target, target_limit;
2193
2194 if (!sata_scr_valid(plink))
2195 return 0;
2196
2197 if (dev->horkage & ATA_HORKAGE_1_5_GBPS)
2198 target = 1;
2199 else
2200 return 0;
2201
2202 target_limit = (1 << target) - 1;
2203
2204 /* if already on stricter limit, no need to push further */
2205 if (plink->sata_spd_limit <= target_limit)
2206 return 0;
2207
2208 plink->sata_spd_limit = target_limit;
2209
2210 /* Request another EH round by returning -EAGAIN if link is
2211 * going faster than the target speed. Forward progress is
2212 * guaranteed by setting sata_spd_limit to target_limit above.
2213 */
2214 if (plink->sata_spd > target) {
2215 ata_dev_info(dev, "applying link speed limit horkage to %s\n",
2216 sata_spd_string(target));
2217 return -EAGAIN;
2218 }
2219 return 0;
2220 }
2221
ata_dev_knobble(struct ata_device * dev)2222 static inline u8 ata_dev_knobble(struct ata_device *dev)
2223 {
2224 struct ata_port *ap = dev->link->ap;
2225
2226 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2227 return 0;
2228
2229 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2230 }
2231
ata_dev_config_ncq_send_recv(struct ata_device * dev)2232 static void ata_dev_config_ncq_send_recv(struct ata_device *dev)
2233 {
2234 struct ata_port *ap = dev->link->ap;
2235 unsigned int err_mask;
2236
2237 if (!ata_log_supported(dev, ATA_LOG_NCQ_SEND_RECV)) {
2238 ata_dev_warn(dev, "NCQ Send/Recv Log not supported\n");
2239 return;
2240 }
2241 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_SEND_RECV,
2242 0, ap->sector_buf, 1);
2243 if (!err_mask) {
2244 u8 *cmds = dev->ncq_send_recv_cmds;
2245
2246 dev->flags |= ATA_DFLAG_NCQ_SEND_RECV;
2247 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_SEND_RECV_SIZE);
2248
2249 if (dev->horkage & ATA_HORKAGE_NO_NCQ_TRIM) {
2250 ata_dev_dbg(dev, "disabling queued TRIM support\n");
2251 cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &=
2252 ~ATA_LOG_NCQ_SEND_RECV_DSM_TRIM;
2253 }
2254 }
2255 }
2256
ata_dev_config_ncq_non_data(struct ata_device * dev)2257 static void ata_dev_config_ncq_non_data(struct ata_device *dev)
2258 {
2259 struct ata_port *ap = dev->link->ap;
2260 unsigned int err_mask;
2261
2262 if (!ata_log_supported(dev, ATA_LOG_NCQ_NON_DATA)) {
2263 ata_dev_warn(dev,
2264 "NCQ Send/Recv Log not supported\n");
2265 return;
2266 }
2267 err_mask = ata_read_log_page(dev, ATA_LOG_NCQ_NON_DATA,
2268 0, ap->sector_buf, 1);
2269 if (!err_mask) {
2270 u8 *cmds = dev->ncq_non_data_cmds;
2271
2272 memcpy(cmds, ap->sector_buf, ATA_LOG_NCQ_NON_DATA_SIZE);
2273 }
2274 }
2275
ata_dev_config_ncq_prio(struct ata_device * dev)2276 static void ata_dev_config_ncq_prio(struct ata_device *dev)
2277 {
2278 struct ata_port *ap = dev->link->ap;
2279 unsigned int err_mask;
2280
2281 if (!ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
2282 return;
2283
2284 err_mask = ata_read_log_page(dev,
2285 ATA_LOG_IDENTIFY_DEVICE,
2286 ATA_LOG_SATA_SETTINGS,
2287 ap->sector_buf,
2288 1);
2289 if (err_mask)
2290 goto not_supported;
2291
2292 if (!(ap->sector_buf[ATA_LOG_NCQ_PRIO_OFFSET] & BIT(3)))
2293 goto not_supported;
2294
2295 dev->flags |= ATA_DFLAG_NCQ_PRIO;
2296
2297 return;
2298
2299 not_supported:
2300 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLED;
2301 dev->flags &= ~ATA_DFLAG_NCQ_PRIO;
2302 }
2303
ata_dev_check_adapter(struct ata_device * dev,unsigned short vendor_id)2304 static bool ata_dev_check_adapter(struct ata_device *dev,
2305 unsigned short vendor_id)
2306 {
2307 struct pci_dev *pcidev = NULL;
2308 struct device *parent_dev = NULL;
2309
2310 for (parent_dev = dev->tdev.parent; parent_dev != NULL;
2311 parent_dev = parent_dev->parent) {
2312 if (dev_is_pci(parent_dev)) {
2313 pcidev = to_pci_dev(parent_dev);
2314 if (pcidev->vendor == vendor_id)
2315 return true;
2316 break;
2317 }
2318 }
2319
2320 return false;
2321 }
2322
ata_dev_config_ncq(struct ata_device * dev,char * desc,size_t desc_sz)2323 static int ata_dev_config_ncq(struct ata_device *dev,
2324 char *desc, size_t desc_sz)
2325 {
2326 struct ata_port *ap = dev->link->ap;
2327 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2328 unsigned int err_mask;
2329 char *aa_desc = "";
2330
2331 if (!ata_id_has_ncq(dev->id)) {
2332 desc[0] = '\0';
2333 return 0;
2334 }
2335 if (!IS_ENABLED(CONFIG_SATA_HOST))
2336 return 0;
2337 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2338 snprintf(desc, desc_sz, "NCQ (not used)");
2339 return 0;
2340 }
2341
2342 if (dev->horkage & ATA_HORKAGE_NO_NCQ_ON_ATI &&
2343 ata_dev_check_adapter(dev, PCI_VENDOR_ID_ATI)) {
2344 snprintf(desc, desc_sz, "NCQ (not used)");
2345 return 0;
2346 }
2347
2348 if (ap->flags & ATA_FLAG_NCQ) {
2349 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE);
2350 dev->flags |= ATA_DFLAG_NCQ;
2351 }
2352
2353 if (!(dev->horkage & ATA_HORKAGE_BROKEN_FPDMA_AA) &&
2354 (ap->flags & ATA_FLAG_FPDMA_AA) &&
2355 ata_id_has_fpdma_aa(dev->id)) {
2356 err_mask = ata_dev_set_feature(dev, SETFEATURES_SATA_ENABLE,
2357 SATA_FPDMA_AA);
2358 if (err_mask) {
2359 ata_dev_err(dev,
2360 "failed to enable AA (error_mask=0x%x)\n",
2361 err_mask);
2362 if (err_mask != AC_ERR_DEV) {
2363 dev->horkage |= ATA_HORKAGE_BROKEN_FPDMA_AA;
2364 return -EIO;
2365 }
2366 } else
2367 aa_desc = ", AA";
2368 }
2369
2370 if (hdepth >= ddepth)
2371 snprintf(desc, desc_sz, "NCQ (depth %d)%s", ddepth, aa_desc);
2372 else
2373 snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth,
2374 ddepth, aa_desc);
2375
2376 if ((ap->flags & ATA_FLAG_FPDMA_AUX)) {
2377 if (ata_id_has_ncq_send_and_recv(dev->id))
2378 ata_dev_config_ncq_send_recv(dev);
2379 if (ata_id_has_ncq_non_data(dev->id))
2380 ata_dev_config_ncq_non_data(dev);
2381 if (ata_id_has_ncq_prio(dev->id))
2382 ata_dev_config_ncq_prio(dev);
2383 }
2384
2385 return 0;
2386 }
2387
ata_dev_config_sense_reporting(struct ata_device * dev)2388 static void ata_dev_config_sense_reporting(struct ata_device *dev)
2389 {
2390 unsigned int err_mask;
2391
2392 if (!ata_id_has_sense_reporting(dev->id))
2393 return;
2394
2395 if (ata_id_sense_reporting_enabled(dev->id))
2396 return;
2397
2398 err_mask = ata_dev_set_feature(dev, SETFEATURE_SENSE_DATA, 0x1);
2399 if (err_mask) {
2400 ata_dev_dbg(dev,
2401 "failed to enable Sense Data Reporting, Emask 0x%x\n",
2402 err_mask);
2403 }
2404 }
2405
ata_dev_config_zac(struct ata_device * dev)2406 static void ata_dev_config_zac(struct ata_device *dev)
2407 {
2408 struct ata_port *ap = dev->link->ap;
2409 unsigned int err_mask;
2410 u8 *identify_buf = ap->sector_buf;
2411
2412 dev->zac_zones_optimal_open = U32_MAX;
2413 dev->zac_zones_optimal_nonseq = U32_MAX;
2414 dev->zac_zones_max_open = U32_MAX;
2415
2416 /*
2417 * Always set the 'ZAC' flag for Host-managed devices.
2418 */
2419 if (dev->class == ATA_DEV_ZAC)
2420 dev->flags |= ATA_DFLAG_ZAC;
2421 else if (ata_id_zoned_cap(dev->id) == 0x01)
2422 /*
2423 * Check for host-aware devices.
2424 */
2425 dev->flags |= ATA_DFLAG_ZAC;
2426
2427 if (!(dev->flags & ATA_DFLAG_ZAC))
2428 return;
2429
2430 if (!ata_identify_page_supported(dev, ATA_LOG_ZONED_INFORMATION)) {
2431 ata_dev_warn(dev,
2432 "ATA Zoned Information Log not supported\n");
2433 return;
2434 }
2435
2436 /*
2437 * Read IDENTIFY DEVICE data log, page 9 (Zoned-device information)
2438 */
2439 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2440 ATA_LOG_ZONED_INFORMATION,
2441 identify_buf, 1);
2442 if (!err_mask) {
2443 u64 zoned_cap, opt_open, opt_nonseq, max_open;
2444
2445 zoned_cap = get_unaligned_le64(&identify_buf[8]);
2446 if ((zoned_cap >> 63))
2447 dev->zac_zoned_cap = (zoned_cap & 1);
2448 opt_open = get_unaligned_le64(&identify_buf[24]);
2449 if ((opt_open >> 63))
2450 dev->zac_zones_optimal_open = (u32)opt_open;
2451 opt_nonseq = get_unaligned_le64(&identify_buf[32]);
2452 if ((opt_nonseq >> 63))
2453 dev->zac_zones_optimal_nonseq = (u32)opt_nonseq;
2454 max_open = get_unaligned_le64(&identify_buf[40]);
2455 if ((max_open >> 63))
2456 dev->zac_zones_max_open = (u32)max_open;
2457 }
2458 }
2459
ata_dev_config_trusted(struct ata_device * dev)2460 static void ata_dev_config_trusted(struct ata_device *dev)
2461 {
2462 struct ata_port *ap = dev->link->ap;
2463 u64 trusted_cap;
2464 unsigned int err;
2465
2466 if (!ata_id_has_trusted(dev->id))
2467 return;
2468
2469 if (!ata_identify_page_supported(dev, ATA_LOG_SECURITY)) {
2470 ata_dev_warn(dev,
2471 "Security Log not supported\n");
2472 return;
2473 }
2474
2475 err = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE, ATA_LOG_SECURITY,
2476 ap->sector_buf, 1);
2477 if (err)
2478 return;
2479
2480 trusted_cap = get_unaligned_le64(&ap->sector_buf[40]);
2481 if (!(trusted_cap & (1ULL << 63))) {
2482 ata_dev_dbg(dev,
2483 "Trusted Computing capability qword not valid!\n");
2484 return;
2485 }
2486
2487 if (trusted_cap & (1 << 0))
2488 dev->flags |= ATA_DFLAG_TRUSTED;
2489 }
2490
ata_dev_config_cdl(struct ata_device * dev)2491 static void ata_dev_config_cdl(struct ata_device *dev)
2492 {
2493 struct ata_port *ap = dev->link->ap;
2494 unsigned int err_mask;
2495 bool cdl_enabled;
2496 u64 val;
2497
2498 if (ata_id_major_version(dev->id) < 11)
2499 goto not_supported;
2500
2501 if (!ata_log_supported(dev, ATA_LOG_IDENTIFY_DEVICE) ||
2502 !ata_identify_page_supported(dev, ATA_LOG_SUPPORTED_CAPABILITIES) ||
2503 !ata_identify_page_supported(dev, ATA_LOG_CURRENT_SETTINGS))
2504 goto not_supported;
2505
2506 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2507 ATA_LOG_SUPPORTED_CAPABILITIES,
2508 ap->sector_buf, 1);
2509 if (err_mask)
2510 goto not_supported;
2511
2512 /* Check Command Duration Limit Supported bits */
2513 val = get_unaligned_le64(&ap->sector_buf[168]);
2514 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(0)))
2515 goto not_supported;
2516
2517 /* Warn the user if command duration guideline is not supported */
2518 if (!(val & BIT_ULL(1)))
2519 ata_dev_warn(dev,
2520 "Command duration guideline is not supported\n");
2521
2522 /*
2523 * We must have support for the sense data for successful NCQ commands
2524 * log indicated by the successful NCQ command sense data supported bit.
2525 */
2526 val = get_unaligned_le64(&ap->sector_buf[8]);
2527 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(47))) {
2528 ata_dev_warn(dev,
2529 "CDL supported but Successful NCQ Command Sense Data is not supported\n");
2530 goto not_supported;
2531 }
2532
2533 /* Without NCQ autosense, the successful NCQ commands log is useless. */
2534 if (!ata_id_has_ncq_autosense(dev->id)) {
2535 ata_dev_warn(dev,
2536 "CDL supported but NCQ autosense is not supported\n");
2537 goto not_supported;
2538 }
2539
2540 /*
2541 * If CDL is marked as enabled, make sure the feature is enabled too.
2542 * Conversely, if CDL is disabled, make sure the feature is turned off.
2543 */
2544 err_mask = ata_read_log_page(dev, ATA_LOG_IDENTIFY_DEVICE,
2545 ATA_LOG_CURRENT_SETTINGS,
2546 ap->sector_buf, 1);
2547 if (err_mask)
2548 goto not_supported;
2549
2550 val = get_unaligned_le64(&ap->sector_buf[8]);
2551 cdl_enabled = val & BIT_ULL(63) && val & BIT_ULL(21);
2552 if (dev->flags & ATA_DFLAG_CDL_ENABLED) {
2553 if (!cdl_enabled) {
2554 /* Enable CDL on the device */
2555 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 1);
2556 if (err_mask) {
2557 ata_dev_err(dev,
2558 "Enable CDL feature failed\n");
2559 goto not_supported;
2560 }
2561 }
2562 } else {
2563 if (cdl_enabled) {
2564 /* Disable CDL on the device */
2565 err_mask = ata_dev_set_feature(dev, SETFEATURES_CDL, 0);
2566 if (err_mask) {
2567 ata_dev_err(dev,
2568 "Disable CDL feature failed\n");
2569 goto not_supported;
2570 }
2571 }
2572 }
2573
2574 /*
2575 * While CDL itself has to be enabled using sysfs, CDL requires that
2576 * sense data for successful NCQ commands is enabled to work properly.
2577 * Just like ata_dev_config_sense_reporting(), enable it unconditionally
2578 * if supported.
2579 */
2580 if (!(val & BIT_ULL(63)) || !(val & BIT_ULL(18))) {
2581 err_mask = ata_dev_set_feature(dev,
2582 SETFEATURE_SENSE_DATA_SUCC_NCQ, 0x1);
2583 if (err_mask) {
2584 ata_dev_warn(dev,
2585 "failed to enable Sense Data for successful NCQ commands, Emask 0x%x\n",
2586 err_mask);
2587 goto not_supported;
2588 }
2589 }
2590
2591 /*
2592 * Allocate a buffer to handle reading the sense data for successful
2593 * NCQ Commands log page for commands using a CDL with one of the limit
2594 * policy set to 0xD (successful completion with sense data available
2595 * bit set).
2596 */
2597 if (!ap->ncq_sense_buf) {
2598 ap->ncq_sense_buf = kmalloc(ATA_LOG_SENSE_NCQ_SIZE, GFP_KERNEL);
2599 if (!ap->ncq_sense_buf)
2600 goto not_supported;
2601 }
2602
2603 /*
2604 * Command duration limits is supported: cache the CDL log page 18h
2605 * (command duration descriptors).
2606 */
2607 err_mask = ata_read_log_page(dev, ATA_LOG_CDL, 0, ap->sector_buf, 1);
2608 if (err_mask) {
2609 ata_dev_warn(dev, "Read Command Duration Limits log failed\n");
2610 goto not_supported;
2611 }
2612
2613 memcpy(dev->cdl, ap->sector_buf, ATA_LOG_CDL_SIZE);
2614 dev->flags |= ATA_DFLAG_CDL;
2615
2616 return;
2617
2618 not_supported:
2619 dev->flags &= ~(ATA_DFLAG_CDL | ATA_DFLAG_CDL_ENABLED);
2620 kfree(ap->ncq_sense_buf);
2621 ap->ncq_sense_buf = NULL;
2622 }
2623
ata_dev_config_lba(struct ata_device * dev)2624 static int ata_dev_config_lba(struct ata_device *dev)
2625 {
2626 const u16 *id = dev->id;
2627 const char *lba_desc;
2628 char ncq_desc[32];
2629 int ret;
2630
2631 dev->flags |= ATA_DFLAG_LBA;
2632
2633 if (ata_id_has_lba48(id)) {
2634 lba_desc = "LBA48";
2635 dev->flags |= ATA_DFLAG_LBA48;
2636 if (dev->n_sectors >= (1UL << 28) &&
2637 ata_id_has_flush_ext(id))
2638 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2639 } else {
2640 lba_desc = "LBA";
2641 }
2642
2643 /* config NCQ */
2644 ret = ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2645
2646 /* print device info to dmesg */
2647 if (ata_dev_print_info(dev))
2648 ata_dev_info(dev,
2649 "%llu sectors, multi %u: %s %s\n",
2650 (unsigned long long)dev->n_sectors,
2651 dev->multi_count, lba_desc, ncq_desc);
2652
2653 return ret;
2654 }
2655
ata_dev_config_chs(struct ata_device * dev)2656 static void ata_dev_config_chs(struct ata_device *dev)
2657 {
2658 const u16 *id = dev->id;
2659
2660 if (ata_id_current_chs_valid(id)) {
2661 /* Current CHS translation is valid. */
2662 dev->cylinders = id[54];
2663 dev->heads = id[55];
2664 dev->sectors = id[56];
2665 } else {
2666 /* Default translation */
2667 dev->cylinders = id[1];
2668 dev->heads = id[3];
2669 dev->sectors = id[6];
2670 }
2671
2672 /* print device info to dmesg */
2673 if (ata_dev_print_info(dev))
2674 ata_dev_info(dev,
2675 "%llu sectors, multi %u, CHS %u/%u/%u\n",
2676 (unsigned long long)dev->n_sectors,
2677 dev->multi_count, dev->cylinders,
2678 dev->heads, dev->sectors);
2679 }
2680
ata_dev_config_fua(struct ata_device * dev)2681 static void ata_dev_config_fua(struct ata_device *dev)
2682 {
2683 /* Ignore FUA support if its use is disabled globally */
2684 if (!libata_fua)
2685 goto nofua;
2686
2687 /* Ignore devices without support for WRITE DMA FUA EXT */
2688 if (!(dev->flags & ATA_DFLAG_LBA48) || !ata_id_has_fua(dev->id))
2689 goto nofua;
2690
2691 /* Ignore known bad devices and devices that lack NCQ support */
2692 if (!ata_ncq_supported(dev) || (dev->horkage & ATA_HORKAGE_NO_FUA))
2693 goto nofua;
2694
2695 dev->flags |= ATA_DFLAG_FUA;
2696
2697 return;
2698
2699 nofua:
2700 dev->flags &= ~ATA_DFLAG_FUA;
2701 }
2702
ata_dev_config_devslp(struct ata_device * dev)2703 static void ata_dev_config_devslp(struct ata_device *dev)
2704 {
2705 u8 *sata_setting = dev->link->ap->sector_buf;
2706 unsigned int err_mask;
2707 int i, j;
2708
2709 /*
2710 * Check device sleep capability. Get DevSlp timing variables
2711 * from SATA Settings page of Identify Device Data Log.
2712 */
2713 if (!ata_id_has_devslp(dev->id) ||
2714 !ata_identify_page_supported(dev, ATA_LOG_SATA_SETTINGS))
2715 return;
2716
2717 err_mask = ata_read_log_page(dev,
2718 ATA_LOG_IDENTIFY_DEVICE,
2719 ATA_LOG_SATA_SETTINGS,
2720 sata_setting, 1);
2721 if (err_mask)
2722 return;
2723
2724 dev->flags |= ATA_DFLAG_DEVSLP;
2725 for (i = 0; i < ATA_LOG_DEVSLP_SIZE; i++) {
2726 j = ATA_LOG_DEVSLP_OFFSET + i;
2727 dev->devslp_timing[i] = sata_setting[j];
2728 }
2729 }
2730
ata_dev_config_cpr(struct ata_device * dev)2731 static void ata_dev_config_cpr(struct ata_device *dev)
2732 {
2733 unsigned int err_mask;
2734 size_t buf_len;
2735 int i, nr_cpr = 0;
2736 struct ata_cpr_log *cpr_log = NULL;
2737 u8 *desc, *buf = NULL;
2738
2739 if (ata_id_major_version(dev->id) < 11)
2740 goto out;
2741
2742 buf_len = ata_log_supported(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES);
2743 if (buf_len == 0)
2744 goto out;
2745
2746 /*
2747 * Read the concurrent positioning ranges log (0x47). We can have at
2748 * most 255 32B range descriptors plus a 64B header. This log varies in
2749 * size, so use the size reported in the GPL directory. Reading beyond
2750 * the supported length will result in an error.
2751 */
2752 buf_len <<= 9;
2753 buf = kzalloc(buf_len, GFP_KERNEL);
2754 if (!buf)
2755 goto out;
2756
2757 err_mask = ata_read_log_page(dev, ATA_LOG_CONCURRENT_POSITIONING_RANGES,
2758 0, buf, buf_len >> 9);
2759 if (err_mask)
2760 goto out;
2761
2762 nr_cpr = buf[0];
2763 if (!nr_cpr)
2764 goto out;
2765
2766 cpr_log = kzalloc(struct_size(cpr_log, cpr, nr_cpr), GFP_KERNEL);
2767 if (!cpr_log)
2768 goto out;
2769
2770 cpr_log->nr_cpr = nr_cpr;
2771 desc = &buf[64];
2772 for (i = 0; i < nr_cpr; i++, desc += 32) {
2773 cpr_log->cpr[i].num = desc[0];
2774 cpr_log->cpr[i].num_storage_elements = desc[1];
2775 cpr_log->cpr[i].start_lba = get_unaligned_le64(&desc[8]);
2776 cpr_log->cpr[i].num_lbas = get_unaligned_le64(&desc[16]);
2777 }
2778
2779 out:
2780 swap(dev->cpr_log, cpr_log);
2781 kfree(cpr_log);
2782 kfree(buf);
2783 }
2784
ata_dev_print_features(struct ata_device * dev)2785 static void ata_dev_print_features(struct ata_device *dev)
2786 {
2787 if (!(dev->flags & ATA_DFLAG_FEATURES_MASK))
2788 return;
2789
2790 ata_dev_info(dev,
2791 "Features:%s%s%s%s%s%s%s%s\n",
2792 dev->flags & ATA_DFLAG_FUA ? " FUA" : "",
2793 dev->flags & ATA_DFLAG_TRUSTED ? " Trust" : "",
2794 dev->flags & ATA_DFLAG_DA ? " Dev-Attention" : "",
2795 dev->flags & ATA_DFLAG_DEVSLP ? " Dev-Sleep" : "",
2796 dev->flags & ATA_DFLAG_NCQ_SEND_RECV ? " NCQ-sndrcv" : "",
2797 dev->flags & ATA_DFLAG_NCQ_PRIO ? " NCQ-prio" : "",
2798 dev->flags & ATA_DFLAG_CDL ? " CDL" : "",
2799 dev->cpr_log ? " CPR" : "");
2800 }
2801
2802 /**
2803 * ata_dev_configure - Configure the specified ATA/ATAPI device
2804 * @dev: Target device to configure
2805 *
2806 * Configure @dev according to @dev->id. Generic and low-level
2807 * driver specific fixups are also applied.
2808 *
2809 * LOCKING:
2810 * Kernel thread context (may sleep)
2811 *
2812 * RETURNS:
2813 * 0 on success, -errno otherwise
2814 */
ata_dev_configure(struct ata_device * dev)2815 int ata_dev_configure(struct ata_device *dev)
2816 {
2817 struct ata_port *ap = dev->link->ap;
2818 bool print_info = ata_dev_print_info(dev);
2819 const u16 *id = dev->id;
2820 unsigned int xfer_mask;
2821 unsigned int err_mask;
2822 char revbuf[7]; /* XYZ-99\0 */
2823 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2824 char modelbuf[ATA_ID_PROD_LEN+1];
2825 int rc;
2826
2827 if (!ata_dev_enabled(dev)) {
2828 ata_dev_dbg(dev, "no device\n");
2829 return 0;
2830 }
2831
2832 /* set horkage */
2833 dev->horkage |= ata_dev_blacklisted(dev);
2834 ata_force_horkage(dev);
2835
2836 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2837 ata_dev_info(dev, "unsupported device, disabling\n");
2838 ata_dev_disable(dev);
2839 return 0;
2840 }
2841
2842 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2843 dev->class == ATA_DEV_ATAPI) {
2844 ata_dev_warn(dev, "WARNING: ATAPI is %s, device ignored\n",
2845 atapi_enabled ? "not supported with this driver"
2846 : "disabled");
2847 ata_dev_disable(dev);
2848 return 0;
2849 }
2850
2851 rc = ata_do_link_spd_horkage(dev);
2852 if (rc)
2853 return rc;
2854
2855 /* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */
2856 if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&
2857 (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)
2858 dev->horkage |= ATA_HORKAGE_NOLPM;
2859
2860 if (ap->flags & ATA_FLAG_NO_LPM)
2861 dev->horkage |= ATA_HORKAGE_NOLPM;
2862
2863 if (dev->horkage & ATA_HORKAGE_NOLPM) {
2864 ata_dev_warn(dev, "LPM support broken, forcing max_power\n");
2865 dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;
2866 }
2867
2868 /* let ACPI work its magic */
2869 rc = ata_acpi_on_devcfg(dev);
2870 if (rc)
2871 return rc;
2872
2873 /* massage HPA, do it early as it might change IDENTIFY data */
2874 rc = ata_hpa_resize(dev);
2875 if (rc)
2876 return rc;
2877
2878 /* print device capabilities */
2879 ata_dev_dbg(dev,
2880 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2881 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2882 __func__,
2883 id[49], id[82], id[83], id[84],
2884 id[85], id[86], id[87], id[88]);
2885
2886 /* initialize to-be-configured parameters */
2887 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2888 dev->max_sectors = 0;
2889 dev->cdb_len = 0;
2890 dev->n_sectors = 0;
2891 dev->cylinders = 0;
2892 dev->heads = 0;
2893 dev->sectors = 0;
2894 dev->multi_count = 0;
2895
2896 /*
2897 * common ATA, ATAPI feature tests
2898 */
2899
2900 /* find max transfer mode; for printk only */
2901 xfer_mask = ata_id_xfermask(id);
2902
2903 ata_dump_id(dev, id);
2904
2905 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2906 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2907 sizeof(fwrevbuf));
2908
2909 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2910 sizeof(modelbuf));
2911
2912 /* ATA-specific feature tests */
2913 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
2914 if (ata_id_is_cfa(id)) {
2915 /* CPRM may make this media unusable */
2916 if (id[ATA_ID_CFA_KEY_MGMT] & 1)
2917 ata_dev_warn(dev,
2918 "supports DRM functions and may not be fully accessible\n");
2919 snprintf(revbuf, 7, "CFA");
2920 } else {
2921 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2922 /* Warn the user if the device has TPM extensions */
2923 if (ata_id_has_tpm(id))
2924 ata_dev_warn(dev,
2925 "supports DRM functions and may not be fully accessible\n");
2926 }
2927
2928 dev->n_sectors = ata_id_n_sectors(id);
2929
2930 /* get current R/W Multiple count setting */
2931 if ((dev->id[47] >> 8) == 0x80 && (dev->id[59] & 0x100)) {
2932 unsigned int max = dev->id[47] & 0xff;
2933 unsigned int cnt = dev->id[59] & 0xff;
2934 /* only recognize/allow powers of two here */
2935 if (is_power_of_2(max) && is_power_of_2(cnt))
2936 if (cnt <= max)
2937 dev->multi_count = cnt;
2938 }
2939
2940 /* print device info to dmesg */
2941 if (print_info)
2942 ata_dev_info(dev, "%s: %s, %s, max %s\n",
2943 revbuf, modelbuf, fwrevbuf,
2944 ata_mode_string(xfer_mask));
2945
2946 if (ata_id_has_lba(id)) {
2947 rc = ata_dev_config_lba(dev);
2948 if (rc)
2949 return rc;
2950 } else {
2951 ata_dev_config_chs(dev);
2952 }
2953
2954 ata_dev_config_fua(dev);
2955 ata_dev_config_devslp(dev);
2956 ata_dev_config_sense_reporting(dev);
2957 ata_dev_config_zac(dev);
2958 ata_dev_config_trusted(dev);
2959 ata_dev_config_cpr(dev);
2960 ata_dev_config_cdl(dev);
2961 dev->cdb_len = 32;
2962
2963 if (print_info)
2964 ata_dev_print_features(dev);
2965 }
2966
2967 /* ATAPI-specific feature tests */
2968 else if (dev->class == ATA_DEV_ATAPI) {
2969 const char *cdb_intr_string = "";
2970 const char *atapi_an_string = "";
2971 const char *dma_dir_string = "";
2972 u32 sntf;
2973
2974 rc = atapi_cdb_len(id);
2975 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2976 ata_dev_warn(dev, "unsupported CDB len %d\n", rc);
2977 rc = -EINVAL;
2978 goto err_out_nosup;
2979 }
2980 dev->cdb_len = (unsigned int) rc;
2981
2982 /* Enable ATAPI AN if both the host and device have
2983 * the support. If PMP is attached, SNTF is required
2984 * to enable ATAPI AN to discern between PHY status
2985 * changed notifications and ATAPI ANs.
2986 */
2987 if (atapi_an &&
2988 (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2989 (!sata_pmp_attached(ap) ||
2990 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2991 /* issue SET feature command to turn this on */
2992 err_mask = ata_dev_set_feature(dev,
2993 SETFEATURES_SATA_ENABLE, SATA_AN);
2994 if (err_mask)
2995 ata_dev_err(dev,
2996 "failed to enable ATAPI AN (err_mask=0x%x)\n",
2997 err_mask);
2998 else {
2999 dev->flags |= ATA_DFLAG_AN;
3000 atapi_an_string = ", ATAPI AN";
3001 }
3002 }
3003
3004 if (ata_id_cdb_intr(dev->id)) {
3005 dev->flags |= ATA_DFLAG_CDB_INTR;
3006 cdb_intr_string = ", CDB intr";
3007 }
3008
3009 if (atapi_dmadir || (dev->horkage & ATA_HORKAGE_ATAPI_DMADIR) || atapi_id_dmadir(dev->id)) {
3010 dev->flags |= ATA_DFLAG_DMADIR;
3011 dma_dir_string = ", DMADIR";
3012 }
3013
3014 if (ata_id_has_da(dev->id)) {
3015 dev->flags |= ATA_DFLAG_DA;
3016 zpodd_init(dev);
3017 }
3018
3019 /* print device info to dmesg */
3020 if (print_info)
3021 ata_dev_info(dev,
3022 "ATAPI: %s, %s, max %s%s%s%s\n",
3023 modelbuf, fwrevbuf,
3024 ata_mode_string(xfer_mask),
3025 cdb_intr_string, atapi_an_string,
3026 dma_dir_string);
3027 }
3028
3029 /* determine max_sectors */
3030 dev->max_sectors = ATA_MAX_SECTORS;
3031 if (dev->flags & ATA_DFLAG_LBA48)
3032 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
3033
3034 /* Limit PATA drive on SATA cable bridge transfers to udma5,
3035 200 sectors */
3036 if (ata_dev_knobble(dev)) {
3037 if (print_info)
3038 ata_dev_info(dev, "applying bridge limits\n");
3039 dev->udma_mask &= ATA_UDMA5;
3040 dev->max_sectors = ATA_MAX_SECTORS;
3041 }
3042
3043 if ((dev->class == ATA_DEV_ATAPI) &&
3044 (atapi_command_packet_set(id) == TYPE_TAPE)) {
3045 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
3046 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
3047 }
3048
3049 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
3050 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
3051 dev->max_sectors);
3052
3053 if (dev->horkage & ATA_HORKAGE_MAX_SEC_1024)
3054 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_1024,
3055 dev->max_sectors);
3056
3057 if (dev->horkage & ATA_HORKAGE_MAX_SEC_LBA48)
3058 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
3059
3060 if (ap->ops->dev_config)
3061 ap->ops->dev_config(dev);
3062
3063 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
3064 /* Let the user know. We don't want to disallow opens for
3065 rescue purposes, or in case the vendor is just a blithering
3066 idiot. Do this after the dev_config call as some controllers
3067 with buggy firmware may want to avoid reporting false device
3068 bugs */
3069
3070 if (print_info) {
3071 ata_dev_warn(dev,
3072 "Drive reports diagnostics failure. This may indicate a drive\n");
3073 ata_dev_warn(dev,
3074 "fault or invalid emulation. Contact drive vendor for information.\n");
3075 }
3076 }
3077
3078 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
3079 ata_dev_warn(dev, "WARNING: device requires firmware update to be fully functional\n");
3080 ata_dev_warn(dev, " contact the vendor or visit http://ata.wiki.kernel.org\n");
3081 }
3082
3083 return 0;
3084
3085 err_out_nosup:
3086 return rc;
3087 }
3088
3089 /**
3090 * ata_cable_40wire - return 40 wire cable type
3091 * @ap: port
3092 *
3093 * Helper method for drivers which want to hardwire 40 wire cable
3094 * detection.
3095 */
3096
ata_cable_40wire(struct ata_port * ap)3097 int ata_cable_40wire(struct ata_port *ap)
3098 {
3099 return ATA_CBL_PATA40;
3100 }
3101 EXPORT_SYMBOL_GPL(ata_cable_40wire);
3102
3103 /**
3104 * ata_cable_80wire - return 80 wire cable type
3105 * @ap: port
3106 *
3107 * Helper method for drivers which want to hardwire 80 wire cable
3108 * detection.
3109 */
3110
ata_cable_80wire(struct ata_port * ap)3111 int ata_cable_80wire(struct ata_port *ap)
3112 {
3113 return ATA_CBL_PATA80;
3114 }
3115 EXPORT_SYMBOL_GPL(ata_cable_80wire);
3116
3117 /**
3118 * ata_cable_unknown - return unknown PATA cable.
3119 * @ap: port
3120 *
3121 * Helper method for drivers which have no PATA cable detection.
3122 */
3123
ata_cable_unknown(struct ata_port * ap)3124 int ata_cable_unknown(struct ata_port *ap)
3125 {
3126 return ATA_CBL_PATA_UNK;
3127 }
3128 EXPORT_SYMBOL_GPL(ata_cable_unknown);
3129
3130 /**
3131 * ata_cable_ignore - return ignored PATA cable.
3132 * @ap: port
3133 *
3134 * Helper method for drivers which don't use cable type to limit
3135 * transfer mode.
3136 */
ata_cable_ignore(struct ata_port * ap)3137 int ata_cable_ignore(struct ata_port *ap)
3138 {
3139 return ATA_CBL_PATA_IGN;
3140 }
3141 EXPORT_SYMBOL_GPL(ata_cable_ignore);
3142
3143 /**
3144 * ata_cable_sata - return SATA cable type
3145 * @ap: port
3146 *
3147 * Helper method for drivers which have SATA cables
3148 */
3149
ata_cable_sata(struct ata_port * ap)3150 int ata_cable_sata(struct ata_port *ap)
3151 {
3152 return ATA_CBL_SATA;
3153 }
3154 EXPORT_SYMBOL_GPL(ata_cable_sata);
3155
3156 /**
3157 * sata_print_link_status - Print SATA link status
3158 * @link: SATA link to printk link status about
3159 *
3160 * This function prints link speed and status of a SATA link.
3161 *
3162 * LOCKING:
3163 * None.
3164 */
sata_print_link_status(struct ata_link * link)3165 static void sata_print_link_status(struct ata_link *link)
3166 {
3167 u32 sstatus, scontrol, tmp;
3168
3169 if (sata_scr_read(link, SCR_STATUS, &sstatus))
3170 return;
3171 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
3172 return;
3173
3174 if (ata_phys_link_online(link)) {
3175 tmp = (sstatus >> 4) & 0xf;
3176 ata_link_info(link, "SATA link up %s (SStatus %X SControl %X)\n",
3177 sata_spd_string(tmp), sstatus, scontrol);
3178 } else {
3179 ata_link_info(link, "SATA link down (SStatus %X SControl %X)\n",
3180 sstatus, scontrol);
3181 }
3182 }
3183
3184 /**
3185 * ata_dev_pair - return other device on cable
3186 * @adev: device
3187 *
3188 * Obtain the other device on the same cable, or if none is
3189 * present NULL is returned
3190 */
3191
ata_dev_pair(struct ata_device * adev)3192 struct ata_device *ata_dev_pair(struct ata_device *adev)
3193 {
3194 struct ata_link *link = adev->link;
3195 struct ata_device *pair = &link->device[1 - adev->devno];
3196 if (!ata_dev_enabled(pair))
3197 return NULL;
3198 return pair;
3199 }
3200 EXPORT_SYMBOL_GPL(ata_dev_pair);
3201
3202 /**
3203 * sata_down_spd_limit - adjust SATA spd limit downward
3204 * @link: Link to adjust SATA spd limit for
3205 * @spd_limit: Additional limit
3206 *
3207 * Adjust SATA spd limit of @link downward. Note that this
3208 * function only adjusts the limit. The change must be applied
3209 * using sata_set_spd().
3210 *
3211 * If @spd_limit is non-zero, the speed is limited to equal to or
3212 * lower than @spd_limit if such speed is supported. If
3213 * @spd_limit is slower than any supported speed, only the lowest
3214 * supported speed is allowed.
3215 *
3216 * LOCKING:
3217 * Inherited from caller.
3218 *
3219 * RETURNS:
3220 * 0 on success, negative errno on failure
3221 */
sata_down_spd_limit(struct ata_link * link,u32 spd_limit)3222 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
3223 {
3224 u32 sstatus, spd, mask;
3225 int rc, bit;
3226
3227 if (!sata_scr_valid(link))
3228 return -EOPNOTSUPP;
3229
3230 /* If SCR can be read, use it to determine the current SPD.
3231 * If not, use cached value in link->sata_spd.
3232 */
3233 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
3234 if (rc == 0 && ata_sstatus_online(sstatus))
3235 spd = (sstatus >> 4) & 0xf;
3236 else
3237 spd = link->sata_spd;
3238
3239 mask = link->sata_spd_limit;
3240 if (mask <= 1)
3241 return -EINVAL;
3242
3243 /* unconditionally mask off the highest bit */
3244 bit = fls(mask) - 1;
3245 mask &= ~(1 << bit);
3246
3247 /*
3248 * Mask off all speeds higher than or equal to the current one. At
3249 * this point, if current SPD is not available and we previously
3250 * recorded the link speed from SStatus, the driver has already
3251 * masked off the highest bit so mask should already be 1 or 0.
3252 * Otherwise, we should not force 1.5Gbps on a link where we have
3253 * not previously recorded speed from SStatus. Just return in this
3254 * case.
3255 */
3256 if (spd > 1)
3257 mask &= (1 << (spd - 1)) - 1;
3258 else if (link->sata_spd)
3259 return -EINVAL;
3260
3261 /* were we already at the bottom? */
3262 if (!mask)
3263 return -EINVAL;
3264
3265 if (spd_limit) {
3266 if (mask & ((1 << spd_limit) - 1))
3267 mask &= (1 << spd_limit) - 1;
3268 else {
3269 bit = ffs(mask) - 1;
3270 mask = 1 << bit;
3271 }
3272 }
3273
3274 link->sata_spd_limit = mask;
3275
3276 ata_link_warn(link, "limiting SATA link speed to %s\n",
3277 sata_spd_string(fls(mask)));
3278
3279 return 0;
3280 }
3281
3282 #ifdef CONFIG_ATA_ACPI
3283 /**
3284 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3285 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3286 * @cycle: cycle duration in ns
3287 *
3288 * Return matching xfer mode for @cycle. The returned mode is of
3289 * the transfer type specified by @xfer_shift. If @cycle is too
3290 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3291 * than the fastest known mode, the fasted mode is returned.
3292 *
3293 * LOCKING:
3294 * None.
3295 *
3296 * RETURNS:
3297 * Matching xfer_mode, 0xff if no match found.
3298 */
ata_timing_cycle2mode(unsigned int xfer_shift,int cycle)3299 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3300 {
3301 u8 base_mode = 0xff, last_mode = 0xff;
3302 const struct ata_xfer_ent *ent;
3303 const struct ata_timing *t;
3304
3305 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3306 if (ent->shift == xfer_shift)
3307 base_mode = ent->base;
3308
3309 for (t = ata_timing_find_mode(base_mode);
3310 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3311 unsigned short this_cycle;
3312
3313 switch (xfer_shift) {
3314 case ATA_SHIFT_PIO:
3315 case ATA_SHIFT_MWDMA:
3316 this_cycle = t->cycle;
3317 break;
3318 case ATA_SHIFT_UDMA:
3319 this_cycle = t->udma;
3320 break;
3321 default:
3322 return 0xff;
3323 }
3324
3325 if (cycle > this_cycle)
3326 break;
3327
3328 last_mode = t->mode;
3329 }
3330
3331 return last_mode;
3332 }
3333 #endif
3334
3335 /**
3336 * ata_down_xfermask_limit - adjust dev xfer masks downward
3337 * @dev: Device to adjust xfer masks
3338 * @sel: ATA_DNXFER_* selector
3339 *
3340 * Adjust xfer masks of @dev downward. Note that this function
3341 * does not apply the change. Invoking ata_set_mode() afterwards
3342 * will apply the limit.
3343 *
3344 * LOCKING:
3345 * Inherited from caller.
3346 *
3347 * RETURNS:
3348 * 0 on success, negative errno on failure
3349 */
ata_down_xfermask_limit(struct ata_device * dev,unsigned int sel)3350 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3351 {
3352 char buf[32];
3353 unsigned int orig_mask, xfer_mask;
3354 unsigned int pio_mask, mwdma_mask, udma_mask;
3355 int quiet, highbit;
3356
3357 quiet = !!(sel & ATA_DNXFER_QUIET);
3358 sel &= ~ATA_DNXFER_QUIET;
3359
3360 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3361 dev->mwdma_mask,
3362 dev->udma_mask);
3363 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3364
3365 switch (sel) {
3366 case ATA_DNXFER_PIO:
3367 highbit = fls(pio_mask) - 1;
3368 pio_mask &= ~(1 << highbit);
3369 break;
3370
3371 case ATA_DNXFER_DMA:
3372 if (udma_mask) {
3373 highbit = fls(udma_mask) - 1;
3374 udma_mask &= ~(1 << highbit);
3375 if (!udma_mask)
3376 return -ENOENT;
3377 } else if (mwdma_mask) {
3378 highbit = fls(mwdma_mask) - 1;
3379 mwdma_mask &= ~(1 << highbit);
3380 if (!mwdma_mask)
3381 return -ENOENT;
3382 }
3383 break;
3384
3385 case ATA_DNXFER_40C:
3386 udma_mask &= ATA_UDMA_MASK_40C;
3387 break;
3388
3389 case ATA_DNXFER_FORCE_PIO0:
3390 pio_mask &= 1;
3391 fallthrough;
3392 case ATA_DNXFER_FORCE_PIO:
3393 mwdma_mask = 0;
3394 udma_mask = 0;
3395 break;
3396
3397 default:
3398 BUG();
3399 }
3400
3401 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3402
3403 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3404 return -ENOENT;
3405
3406 if (!quiet) {
3407 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3408 snprintf(buf, sizeof(buf), "%s:%s",
3409 ata_mode_string(xfer_mask),
3410 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3411 else
3412 snprintf(buf, sizeof(buf), "%s",
3413 ata_mode_string(xfer_mask));
3414
3415 ata_dev_warn(dev, "limiting speed to %s\n", buf);
3416 }
3417
3418 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3419 &dev->udma_mask);
3420
3421 return 0;
3422 }
3423
ata_dev_set_mode(struct ata_device * dev)3424 static int ata_dev_set_mode(struct ata_device *dev)
3425 {
3426 struct ata_port *ap = dev->link->ap;
3427 struct ata_eh_context *ehc = &dev->link->eh_context;
3428 const bool nosetxfer = dev->horkage & ATA_HORKAGE_NOSETXFER;
3429 const char *dev_err_whine = "";
3430 int ign_dev_err = 0;
3431 unsigned int err_mask = 0;
3432 int rc;
3433
3434 dev->flags &= ~ATA_DFLAG_PIO;
3435 if (dev->xfer_shift == ATA_SHIFT_PIO)
3436 dev->flags |= ATA_DFLAG_PIO;
3437
3438 if (nosetxfer && ap->flags & ATA_FLAG_SATA && ata_id_is_sata(dev->id))
3439 dev_err_whine = " (SET_XFERMODE skipped)";
3440 else {
3441 if (nosetxfer)
3442 ata_dev_warn(dev,
3443 "NOSETXFER but PATA detected - can't "
3444 "skip SETXFER, might malfunction\n");
3445 err_mask = ata_dev_set_xfermode(dev);
3446 }
3447
3448 if (err_mask & ~AC_ERR_DEV)
3449 goto fail;
3450
3451 /* revalidate */
3452 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3453 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3454 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3455 if (rc)
3456 return rc;
3457
3458 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3459 /* Old CFA may refuse this command, which is just fine */
3460 if (ata_id_is_cfa(dev->id))
3461 ign_dev_err = 1;
3462 /* Catch several broken garbage emulations plus some pre
3463 ATA devices */
3464 if (ata_id_major_version(dev->id) == 0 &&
3465 dev->pio_mode <= XFER_PIO_2)
3466 ign_dev_err = 1;
3467 /* Some very old devices and some bad newer ones fail
3468 any kind of SET_XFERMODE request but support PIO0-2
3469 timings and no IORDY */
3470 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3471 ign_dev_err = 1;
3472 }
3473 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3474 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3475 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3476 dev->dma_mode == XFER_MW_DMA_0 &&
3477 (dev->id[63] >> 8) & 1)
3478 ign_dev_err = 1;
3479
3480 /* if the device is actually configured correctly, ignore dev err */
3481 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3482 ign_dev_err = 1;
3483
3484 if (err_mask & AC_ERR_DEV) {
3485 if (!ign_dev_err)
3486 goto fail;
3487 else
3488 dev_err_whine = " (device error ignored)";
3489 }
3490
3491 ata_dev_dbg(dev, "xfer_shift=%u, xfer_mode=0x%x\n",
3492 dev->xfer_shift, (int)dev->xfer_mode);
3493
3494 if (!(ehc->i.flags & ATA_EHI_QUIET) ||
3495 ehc->i.flags & ATA_EHI_DID_HARDRESET)
3496 ata_dev_info(dev, "configured for %s%s\n",
3497 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3498 dev_err_whine);
3499
3500 return 0;
3501
3502 fail:
3503 ata_dev_err(dev, "failed to set xfermode (err_mask=0x%x)\n", err_mask);
3504 return -EIO;
3505 }
3506
3507 /**
3508 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3509 * @link: link on which timings will be programmed
3510 * @r_failed_dev: out parameter for failed device
3511 *
3512 * Standard implementation of the function used to tune and set
3513 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3514 * ata_dev_set_mode() fails, pointer to the failing device is
3515 * returned in @r_failed_dev.
3516 *
3517 * LOCKING:
3518 * PCI/etc. bus probe sem.
3519 *
3520 * RETURNS:
3521 * 0 on success, negative errno otherwise
3522 */
3523
ata_do_set_mode(struct ata_link * link,struct ata_device ** r_failed_dev)3524 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3525 {
3526 struct ata_port *ap = link->ap;
3527 struct ata_device *dev;
3528 int rc = 0, used_dma = 0, found = 0;
3529
3530 /* step 1: calculate xfer_mask */
3531 ata_for_each_dev(dev, link, ENABLED) {
3532 unsigned int pio_mask, dma_mask;
3533 unsigned int mode_mask;
3534
3535 mode_mask = ATA_DMA_MASK_ATA;
3536 if (dev->class == ATA_DEV_ATAPI)
3537 mode_mask = ATA_DMA_MASK_ATAPI;
3538 else if (ata_id_is_cfa(dev->id))
3539 mode_mask = ATA_DMA_MASK_CFA;
3540
3541 ata_dev_xfermask(dev);
3542 ata_force_xfermask(dev);
3543
3544 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3545
3546 if (libata_dma_mask & mode_mask)
3547 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask,
3548 dev->udma_mask);
3549 else
3550 dma_mask = 0;
3551
3552 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3553 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3554
3555 found = 1;
3556 if (ata_dma_enabled(dev))
3557 used_dma = 1;
3558 }
3559 if (!found)
3560 goto out;
3561
3562 /* step 2: always set host PIO timings */
3563 ata_for_each_dev(dev, link, ENABLED) {
3564 if (dev->pio_mode == 0xff) {
3565 ata_dev_warn(dev, "no PIO support\n");
3566 rc = -EINVAL;
3567 goto out;
3568 }
3569
3570 dev->xfer_mode = dev->pio_mode;
3571 dev->xfer_shift = ATA_SHIFT_PIO;
3572 if (ap->ops->set_piomode)
3573 ap->ops->set_piomode(ap, dev);
3574 }
3575
3576 /* step 3: set host DMA timings */
3577 ata_for_each_dev(dev, link, ENABLED) {
3578 if (!ata_dma_enabled(dev))
3579 continue;
3580
3581 dev->xfer_mode = dev->dma_mode;
3582 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3583 if (ap->ops->set_dmamode)
3584 ap->ops->set_dmamode(ap, dev);
3585 }
3586
3587 /* step 4: update devices' xfer mode */
3588 ata_for_each_dev(dev, link, ENABLED) {
3589 rc = ata_dev_set_mode(dev);
3590 if (rc)
3591 goto out;
3592 }
3593
3594 /* Record simplex status. If we selected DMA then the other
3595 * host channels are not permitted to do so.
3596 */
3597 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3598 ap->host->simplex_claimed = ap;
3599
3600 out:
3601 if (rc)
3602 *r_failed_dev = dev;
3603 return rc;
3604 }
3605 EXPORT_SYMBOL_GPL(ata_do_set_mode);
3606
3607 /**
3608 * ata_wait_ready - wait for link to become ready
3609 * @link: link to be waited on
3610 * @deadline: deadline jiffies for the operation
3611 * @check_ready: callback to check link readiness
3612 *
3613 * Wait for @link to become ready. @check_ready should return
3614 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3615 * link doesn't seem to be occupied, other errno for other error
3616 * conditions.
3617 *
3618 * Transient -ENODEV conditions are allowed for
3619 * ATA_TMOUT_FF_WAIT.
3620 *
3621 * LOCKING:
3622 * EH context.
3623 *
3624 * RETURNS:
3625 * 0 if @link is ready before @deadline; otherwise, -errno.
3626 */
ata_wait_ready(struct ata_link * link,unsigned long deadline,int (* check_ready)(struct ata_link * link))3627 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3628 int (*check_ready)(struct ata_link *link))
3629 {
3630 unsigned long start = jiffies;
3631 unsigned long nodev_deadline;
3632 int warned = 0;
3633
3634 /* choose which 0xff timeout to use, read comment in libata.h */
3635 if (link->ap->host->flags & ATA_HOST_PARALLEL_SCAN)
3636 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT_LONG);
3637 else
3638 nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3639
3640 /* Slave readiness can't be tested separately from master. On
3641 * M/S emulation configuration, this function should be called
3642 * only on the master and it will handle both master and slave.
3643 */
3644 WARN_ON(link == link->ap->slave_link);
3645
3646 if (time_after(nodev_deadline, deadline))
3647 nodev_deadline = deadline;
3648
3649 while (1) {
3650 unsigned long now = jiffies;
3651 int ready, tmp;
3652
3653 ready = tmp = check_ready(link);
3654 if (ready > 0)
3655 return 0;
3656
3657 /*
3658 * -ENODEV could be transient. Ignore -ENODEV if link
3659 * is online. Also, some SATA devices take a long
3660 * time to clear 0xff after reset. Wait for
3661 * ATA_TMOUT_FF_WAIT[_LONG] on -ENODEV if link isn't
3662 * offline.
3663 *
3664 * Note that some PATA controllers (pata_ali) explode
3665 * if status register is read more than once when
3666 * there's no device attached.
3667 */
3668 if (ready == -ENODEV) {
3669 if (ata_link_online(link))
3670 ready = 0;
3671 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3672 !ata_link_offline(link) &&
3673 time_before(now, nodev_deadline))
3674 ready = 0;
3675 }
3676
3677 if (ready)
3678 return ready;
3679 if (time_after(now, deadline))
3680 return -EBUSY;
3681
3682 if (!warned && time_after(now, start + 5 * HZ) &&
3683 (deadline - now > 3 * HZ)) {
3684 ata_link_warn(link,
3685 "link is slow to respond, please be patient "
3686 "(ready=%d)\n", tmp);
3687 warned = 1;
3688 }
3689
3690 ata_msleep(link->ap, 50);
3691 }
3692 }
3693
3694 /**
3695 * ata_wait_after_reset - wait for link to become ready after reset
3696 * @link: link to be waited on
3697 * @deadline: deadline jiffies for the operation
3698 * @check_ready: callback to check link readiness
3699 *
3700 * Wait for @link to become ready after reset.
3701 *
3702 * LOCKING:
3703 * EH context.
3704 *
3705 * RETURNS:
3706 * 0 if @link is ready before @deadline; otherwise, -errno.
3707 */
ata_wait_after_reset(struct ata_link * link,unsigned long deadline,int (* check_ready)(struct ata_link * link))3708 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3709 int (*check_ready)(struct ata_link *link))
3710 {
3711 ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);
3712
3713 return ata_wait_ready(link, deadline, check_ready);
3714 }
3715 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
3716
3717 /**
3718 * ata_std_prereset - prepare for reset
3719 * @link: ATA link to be reset
3720 * @deadline: deadline jiffies for the operation
3721 *
3722 * @link is about to be reset. Initialize it. Failure from
3723 * prereset makes libata abort whole reset sequence and give up
3724 * that port, so prereset should be best-effort. It does its
3725 * best to prepare for reset sequence but if things go wrong, it
3726 * should just whine, not fail.
3727 *
3728 * LOCKING:
3729 * Kernel thread context (may sleep)
3730 *
3731 * RETURNS:
3732 * Always 0.
3733 */
ata_std_prereset(struct ata_link * link,unsigned long deadline)3734 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3735 {
3736 struct ata_port *ap = link->ap;
3737 struct ata_eh_context *ehc = &link->eh_context;
3738 const unsigned int *timing = sata_ehc_deb_timing(ehc);
3739 int rc;
3740
3741 /* if we're about to do hardreset, nothing more to do */
3742 if (ehc->i.action & ATA_EH_HARDRESET)
3743 return 0;
3744
3745 /* if SATA, resume link */
3746 if (ap->flags & ATA_FLAG_SATA) {
3747 rc = sata_link_resume(link, timing, deadline);
3748 /* whine about phy resume failure but proceed */
3749 if (rc && rc != -EOPNOTSUPP)
3750 ata_link_warn(link,
3751 "failed to resume link for reset (errno=%d)\n",
3752 rc);
3753 }
3754
3755 /* no point in trying softreset on offline link */
3756 if (ata_phys_link_offline(link))
3757 ehc->i.action &= ~ATA_EH_SOFTRESET;
3758
3759 return 0;
3760 }
3761 EXPORT_SYMBOL_GPL(ata_std_prereset);
3762
3763 /**
3764 * sata_std_hardreset - COMRESET w/o waiting or classification
3765 * @link: link to reset
3766 * @class: resulting class of attached device
3767 * @deadline: deadline jiffies for the operation
3768 *
3769 * Standard SATA COMRESET w/o waiting or classification.
3770 *
3771 * LOCKING:
3772 * Kernel thread context (may sleep)
3773 *
3774 * RETURNS:
3775 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3776 */
sata_std_hardreset(struct ata_link * link,unsigned int * class,unsigned long deadline)3777 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3778 unsigned long deadline)
3779 {
3780 const unsigned int *timing = sata_ehc_deb_timing(&link->eh_context);
3781 bool online;
3782 int rc;
3783
3784 /* do hardreset */
3785 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3786 return online ? -EAGAIN : rc;
3787 }
3788 EXPORT_SYMBOL_GPL(sata_std_hardreset);
3789
3790 /**
3791 * ata_std_postreset - standard postreset callback
3792 * @link: the target ata_link
3793 * @classes: classes of attached devices
3794 *
3795 * This function is invoked after a successful reset. Note that
3796 * the device might have been reset more than once using
3797 * different reset methods before postreset is invoked.
3798 *
3799 * LOCKING:
3800 * Kernel thread context (may sleep)
3801 */
ata_std_postreset(struct ata_link * link,unsigned int * classes)3802 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3803 {
3804 u32 serror;
3805
3806 /* reset complete, clear SError */
3807 if (!sata_scr_read(link, SCR_ERROR, &serror))
3808 sata_scr_write(link, SCR_ERROR, serror);
3809
3810 /* print link status */
3811 sata_print_link_status(link);
3812 }
3813 EXPORT_SYMBOL_GPL(ata_std_postreset);
3814
3815 /**
3816 * ata_dev_same_device - Determine whether new ID matches configured device
3817 * @dev: device to compare against
3818 * @new_class: class of the new device
3819 * @new_id: IDENTIFY page of the new device
3820 *
3821 * Compare @new_class and @new_id against @dev and determine
3822 * whether @dev is the device indicated by @new_class and
3823 * @new_id.
3824 *
3825 * LOCKING:
3826 * None.
3827 *
3828 * RETURNS:
3829 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3830 */
ata_dev_same_device(struct ata_device * dev,unsigned int new_class,const u16 * new_id)3831 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3832 const u16 *new_id)
3833 {
3834 const u16 *old_id = dev->id;
3835 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3836 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3837
3838 if (dev->class != new_class) {
3839 ata_dev_info(dev, "class mismatch %d != %d\n",
3840 dev->class, new_class);
3841 return 0;
3842 }
3843
3844 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3845 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3846 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3847 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3848
3849 if (strcmp(model[0], model[1])) {
3850 ata_dev_info(dev, "model number mismatch '%s' != '%s'\n",
3851 model[0], model[1]);
3852 return 0;
3853 }
3854
3855 if (strcmp(serial[0], serial[1])) {
3856 ata_dev_info(dev, "serial number mismatch '%s' != '%s'\n",
3857 serial[0], serial[1]);
3858 return 0;
3859 }
3860
3861 return 1;
3862 }
3863
3864 /**
3865 * ata_dev_reread_id - Re-read IDENTIFY data
3866 * @dev: target ATA device
3867 * @readid_flags: read ID flags
3868 *
3869 * Re-read IDENTIFY page and make sure @dev is still attached to
3870 * the port.
3871 *
3872 * LOCKING:
3873 * Kernel thread context (may sleep)
3874 *
3875 * RETURNS:
3876 * 0 on success, negative errno otherwise
3877 */
ata_dev_reread_id(struct ata_device * dev,unsigned int readid_flags)3878 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3879 {
3880 unsigned int class = dev->class;
3881 u16 *id = (void *)dev->link->ap->sector_buf;
3882 int rc;
3883
3884 /* read ID data */
3885 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3886 if (rc)
3887 return rc;
3888
3889 /* is the device still there? */
3890 if (!ata_dev_same_device(dev, class, id))
3891 return -ENODEV;
3892
3893 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
3894 return 0;
3895 }
3896
3897 /**
3898 * ata_dev_revalidate - Revalidate ATA device
3899 * @dev: device to revalidate
3900 * @new_class: new class code
3901 * @readid_flags: read ID flags
3902 *
3903 * Re-read IDENTIFY page, make sure @dev is still attached to the
3904 * port and reconfigure it according to the new IDENTIFY page.
3905 *
3906 * LOCKING:
3907 * Kernel thread context (may sleep)
3908 *
3909 * RETURNS:
3910 * 0 on success, negative errno otherwise
3911 */
ata_dev_revalidate(struct ata_device * dev,unsigned int new_class,unsigned int readid_flags)3912 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
3913 unsigned int readid_flags)
3914 {
3915 u64 n_sectors = dev->n_sectors;
3916 u64 n_native_sectors = dev->n_native_sectors;
3917 int rc;
3918
3919 if (!ata_dev_enabled(dev))
3920 return -ENODEV;
3921
3922 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
3923 if (ata_class_enabled(new_class) && new_class == ATA_DEV_PMP) {
3924 ata_dev_info(dev, "class mismatch %u != %u\n",
3925 dev->class, new_class);
3926 rc = -ENODEV;
3927 goto fail;
3928 }
3929
3930 /* re-read ID */
3931 rc = ata_dev_reread_id(dev, readid_flags);
3932 if (rc)
3933 goto fail;
3934
3935 /* configure device according to the new ID */
3936 rc = ata_dev_configure(dev);
3937 if (rc)
3938 goto fail;
3939
3940 /* verify n_sectors hasn't changed */
3941 if (dev->class != ATA_DEV_ATA || !n_sectors ||
3942 dev->n_sectors == n_sectors)
3943 return 0;
3944
3945 /* n_sectors has changed */
3946 ata_dev_warn(dev, "n_sectors mismatch %llu != %llu\n",
3947 (unsigned long long)n_sectors,
3948 (unsigned long long)dev->n_sectors);
3949
3950 /*
3951 * Something could have caused HPA to be unlocked
3952 * involuntarily. If n_native_sectors hasn't changed and the
3953 * new size matches it, keep the device.
3954 */
3955 if (dev->n_native_sectors == n_native_sectors &&
3956 dev->n_sectors > n_sectors && dev->n_sectors == n_native_sectors) {
3957 ata_dev_warn(dev,
3958 "new n_sectors matches native, probably "
3959 "late HPA unlock, n_sectors updated\n");
3960 /* use the larger n_sectors */
3961 return 0;
3962 }
3963
3964 /*
3965 * Some BIOSes boot w/o HPA but resume w/ HPA locked. Try
3966 * unlocking HPA in those cases.
3967 *
3968 * https://bugzilla.kernel.org/show_bug.cgi?id=15396
3969 */
3970 if (dev->n_native_sectors == n_native_sectors &&
3971 dev->n_sectors < n_sectors && n_sectors == n_native_sectors &&
3972 !(dev->horkage & ATA_HORKAGE_BROKEN_HPA)) {
3973 ata_dev_warn(dev,
3974 "old n_sectors matches native, probably "
3975 "late HPA lock, will try to unlock HPA\n");
3976 /* try unlocking HPA */
3977 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
3978 rc = -EIO;
3979 } else
3980 rc = -ENODEV;
3981
3982 /* restore original n_[native_]sectors and fail */
3983 dev->n_native_sectors = n_native_sectors;
3984 dev->n_sectors = n_sectors;
3985 fail:
3986 ata_dev_err(dev, "revalidation failed (errno=%d)\n", rc);
3987 return rc;
3988 }
3989
3990 struct ata_blacklist_entry {
3991 const char *model_num;
3992 const char *model_rev;
3993 unsigned long horkage;
3994 };
3995
3996 static const struct ata_blacklist_entry ata_device_blacklist [] = {
3997 /* Devices with DMA related problems under Linux */
3998 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
3999 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4000 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4001 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4002 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4003 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4004 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4005 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4006 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4007 { "CRD-848[02]B", NULL, ATA_HORKAGE_NODMA },
4008 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4009 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4010 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4011 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4012 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4013 { "HITACHI CDR-8[34]35",NULL, ATA_HORKAGE_NODMA },
4014 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4015 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4016 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4017 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4018 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4019 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4020 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4021 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4022 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4023 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4024 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4025 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4026 { " 2GB ATA Flash Disk", "ADMA428M", ATA_HORKAGE_NODMA },
4027 { "VRFDFC22048UCHC-TE*", NULL, ATA_HORKAGE_NODMA },
4028 /* Odd clown on sil3726/4726 PMPs */
4029 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4030 /* Similar story with ASMedia 1092 */
4031 { "ASMT109x- Config", NULL, ATA_HORKAGE_DISABLE },
4032
4033 /* Weird ATAPI devices */
4034 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4035 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4036 { "Slimtype DVD A DS8A8SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4037 { "Slimtype DVD A DS8A9SH", NULL, ATA_HORKAGE_MAX_SEC_LBA48 },
4038
4039 /*
4040 * Causes silent data corruption with higher max sects.
4041 * http://lkml.kernel.org/g/x49wpy40ysk.fsf@segfault.boston.devel.redhat.com
4042 */
4043 { "ST380013AS", "3.20", ATA_HORKAGE_MAX_SEC_1024 },
4044
4045 /*
4046 * These devices time out with higher max sects.
4047 * https://bugzilla.kernel.org/show_bug.cgi?id=121671
4048 */
4049 { "LITEON CX1-JB*-HP", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4050 { "LITEON EP1-*", NULL, ATA_HORKAGE_MAX_SEC_1024 },
4051
4052 /* Devices we expect to fail diagnostics */
4053
4054 /* Devices where NCQ should be avoided */
4055 /* NCQ is slow */
4056 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4057 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ },
4058 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4059 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4060 /* NCQ is broken */
4061 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4062 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4063 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4064 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4065 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4066
4067 /* Seagate NCQ + FLUSH CACHE firmware bug */
4068 { "ST31500341AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4069 ATA_HORKAGE_FIRMWARE_WARN },
4070
4071 { "ST31000333AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4072 ATA_HORKAGE_FIRMWARE_WARN },
4073
4074 { "ST3640[36]23AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4075 ATA_HORKAGE_FIRMWARE_WARN },
4076
4077 { "ST3320[68]13AS", "SD1[5-9]", ATA_HORKAGE_NONCQ |
4078 ATA_HORKAGE_FIRMWARE_WARN },
4079
4080 /* drives which fail FPDMA_AA activation (some may freeze afterwards)
4081 the ST disks also have LPM issues */
4082 { "ST1000LM024 HN-M101MBB", NULL, ATA_HORKAGE_BROKEN_FPDMA_AA |
4083 ATA_HORKAGE_NOLPM },
4084 { "VB0250EAVER", "HPG7", ATA_HORKAGE_BROKEN_FPDMA_AA },
4085
4086 /* Blacklist entries taken from Silicon Image 3124/3132
4087 Windows driver .inf file - also several Linux problem reports */
4088 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ },
4089 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ },
4090 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ },
4091
4092 /* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
4093 { "C300-CTFDDAC128MAG", "0001", ATA_HORKAGE_NONCQ },
4094
4095 /* Sandisk SD7/8/9s lock up hard on large trims */
4096 { "SanDisk SD[789]*", NULL, ATA_HORKAGE_MAX_TRIM_128M },
4097
4098 /* devices which puke on READ_NATIVE_MAX */
4099 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA },
4100 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4101 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4102 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4103
4104 /* this one allows HPA unlocking but fails IOs on the area */
4105 { "OCZ-VERTEX", "1.30", ATA_HORKAGE_BROKEN_HPA },
4106
4107 /* Devices which report 1 sector over size HPA */
4108 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE },
4109 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE },
4110 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE },
4111
4112 /* Devices which get the IVB wrong */
4113 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB },
4114 /* Maybe we should just blacklist TSSTcorp... */
4115 { "TSSTcorp CDDVDW SH-S202[HJN]", "SB0[01]", ATA_HORKAGE_IVB },
4116
4117 /* Devices that do not need bridging limits applied */
4118 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK },
4119 { "BUFFALO HD-QSU2/R5", NULL, ATA_HORKAGE_BRIDGE_OK },
4120
4121 /* Devices which aren't very happy with higher link speeds */
4122 { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS },
4123 { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS },
4124
4125 /*
4126 * Devices which choke on SETXFER. Applies only if both the
4127 * device and controller are SATA.
4128 */
4129 { "PIONEER DVD-RW DVRTD08", NULL, ATA_HORKAGE_NOSETXFER },
4130 { "PIONEER DVD-RW DVRTD08A", NULL, ATA_HORKAGE_NOSETXFER },
4131 { "PIONEER DVD-RW DVR-215", NULL, ATA_HORKAGE_NOSETXFER },
4132 { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER },
4133 { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },
4134
4135 /* These specific Pioneer models have LPM issues */
4136 { "PIONEER BD-RW BDR-207M", NULL, ATA_HORKAGE_NOLPM },
4137 { "PIONEER BD-RW BDR-205", NULL, ATA_HORKAGE_NOLPM },
4138
4139 /* Crucial BX100 SSD 500GB has broken LPM support */
4140 { "CT500BX100SSD1", NULL, ATA_HORKAGE_NOLPM },
4141
4142 /* 512GB MX100 with MU01 firmware has both queued TRIM and LPM issues */
4143 { "Crucial_CT512MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4144 ATA_HORKAGE_ZERO_AFTER_TRIM |
4145 ATA_HORKAGE_NOLPM },
4146 /* 512GB MX100 with newer firmware has only LPM issues */
4147 { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM |
4148 ATA_HORKAGE_NOLPM },
4149
4150 /* 480GB+ M500 SSDs have both queued TRIM and LPM issues */
4151 { "Crucial_CT480M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4152 ATA_HORKAGE_ZERO_AFTER_TRIM |
4153 ATA_HORKAGE_NOLPM },
4154 { "Crucial_CT960M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4155 ATA_HORKAGE_ZERO_AFTER_TRIM |
4156 ATA_HORKAGE_NOLPM },
4157
4158 /* These specific Samsung models/firmware-revs do not handle LPM well */
4159 { "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM },
4160 { "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM },
4161 { "SAMSUNG MZ7TD256HAFV-000L9", NULL, ATA_HORKAGE_NOLPM },
4162 { "SAMSUNG MZ7TE512HMHP-000L1", "EXT06L0Q", ATA_HORKAGE_NOLPM },
4163
4164 /* devices that don't properly handle queued TRIM commands */
4165 { "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4166 ATA_HORKAGE_ZERO_AFTER_TRIM },
4167 { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4168 ATA_HORKAGE_ZERO_AFTER_TRIM },
4169 { "Micron_M5[15]0_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4170 ATA_HORKAGE_ZERO_AFTER_TRIM },
4171 { "Micron_1100_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4172 ATA_HORKAGE_ZERO_AFTER_TRIM, },
4173 { "Crucial_CT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4174 ATA_HORKAGE_ZERO_AFTER_TRIM },
4175 { "Crucial_CT*M550*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4176 ATA_HORKAGE_ZERO_AFTER_TRIM },
4177 { "Crucial_CT*MX100*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
4178 ATA_HORKAGE_ZERO_AFTER_TRIM },
4179 { "Samsung SSD 840 EVO*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4180 ATA_HORKAGE_NO_DMA_LOG |
4181 ATA_HORKAGE_ZERO_AFTER_TRIM },
4182 { "Samsung SSD 840*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4183 ATA_HORKAGE_ZERO_AFTER_TRIM },
4184 { "Samsung SSD 850*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4185 ATA_HORKAGE_ZERO_AFTER_TRIM },
4186 { "Samsung SSD 860*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4187 ATA_HORKAGE_ZERO_AFTER_TRIM |
4188 ATA_HORKAGE_NO_NCQ_ON_ATI },
4189 { "Samsung SSD 870*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4190 ATA_HORKAGE_ZERO_AFTER_TRIM |
4191 ATA_HORKAGE_NO_NCQ_ON_ATI },
4192 { "SAMSUNG*MZ7LH*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4193 ATA_HORKAGE_ZERO_AFTER_TRIM |
4194 ATA_HORKAGE_NO_NCQ_ON_ATI, },
4195 { "FCCT*M500*", NULL, ATA_HORKAGE_NO_NCQ_TRIM |
4196 ATA_HORKAGE_ZERO_AFTER_TRIM },
4197
4198 /* devices that don't properly handle TRIM commands */
4199 { "SuperSSpeed S238*", NULL, ATA_HORKAGE_NOTRIM },
4200 { "M88V29*", NULL, ATA_HORKAGE_NOTRIM },
4201
4202 /*
4203 * As defined, the DRAT (Deterministic Read After Trim) and RZAT
4204 * (Return Zero After Trim) flags in the ATA Command Set are
4205 * unreliable in the sense that they only define what happens if
4206 * the device successfully executed the DSM TRIM command. TRIM
4207 * is only advisory, however, and the device is free to silently
4208 * ignore all or parts of the request.
4209 *
4210 * Whitelist drives that are known to reliably return zeroes
4211 * after TRIM.
4212 */
4213
4214 /*
4215 * The intel 510 drive has buggy DRAT/RZAT. Explicitly exclude
4216 * that model before whitelisting all other intel SSDs.
4217 */
4218 { "INTEL*SSDSC2MH*", NULL, 0 },
4219
4220 { "Micron*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4221 { "Crucial*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4222 { "INTEL*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4223 { "SSD*INTEL*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4224 { "Samsung*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4225 { "SAMSUNG*SSD*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4226 { "SAMSUNG*MZ7KM*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4227 { "ST[1248][0248]0[FH]*", NULL, ATA_HORKAGE_ZERO_AFTER_TRIM },
4228
4229 /*
4230 * Some WD SATA-I drives spin up and down erratically when the link
4231 * is put into the slumber mode. We don't have full list of the
4232 * affected devices. Disable LPM if the device matches one of the
4233 * known prefixes and is SATA-1. As a side effect LPM partial is
4234 * lost too.
4235 *
4236 * https://bugzilla.kernel.org/show_bug.cgi?id=57211
4237 */
4238 { "WDC WD800JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4239 { "WDC WD1200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4240 { "WDC WD1600JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4241 { "WDC WD2000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4242 { "WDC WD2500JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4243 { "WDC WD3000JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4244 { "WDC WD3200JD-*", NULL, ATA_HORKAGE_WD_BROKEN_LPM },
4245
4246 /*
4247 * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY
4248 * log page is accessed. Ensure we never ask for this log page with
4249 * these devices.
4250 */
4251 { "SATADOM-ML 3ME", NULL, ATA_HORKAGE_NO_LOG_DIR },
4252
4253 /* Buggy FUA */
4254 { "Maxtor", "BANC1G10", ATA_HORKAGE_NO_FUA },
4255 { "WDC*WD2500J*", NULL, ATA_HORKAGE_NO_FUA },
4256 { "OCZ-VERTEX*", NULL, ATA_HORKAGE_NO_FUA },
4257 { "INTEL*SSDSC2CT*", NULL, ATA_HORKAGE_NO_FUA },
4258
4259 /* End Marker */
4260 { }
4261 };
4262
ata_dev_blacklisted(const struct ata_device * dev)4263 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4264 {
4265 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4266 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4267 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4268
4269 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4270 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4271
4272 while (ad->model_num) {
4273 if (glob_match(ad->model_num, model_num)) {
4274 if (ad->model_rev == NULL)
4275 return ad->horkage;
4276 if (glob_match(ad->model_rev, model_rev))
4277 return ad->horkage;
4278 }
4279 ad++;
4280 }
4281 return 0;
4282 }
4283
ata_dma_blacklisted(const struct ata_device * dev)4284 static int ata_dma_blacklisted(const struct ata_device *dev)
4285 {
4286 /* We don't support polling DMA.
4287 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4288 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4289 */
4290 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4291 (dev->flags & ATA_DFLAG_CDB_INTR))
4292 return 1;
4293 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4294 }
4295
4296 /**
4297 * ata_is_40wire - check drive side detection
4298 * @dev: device
4299 *
4300 * Perform drive side detection decoding, allowing for device vendors
4301 * who can't follow the documentation.
4302 */
4303
ata_is_40wire(struct ata_device * dev)4304 static int ata_is_40wire(struct ata_device *dev)
4305 {
4306 if (dev->horkage & ATA_HORKAGE_IVB)
4307 return ata_drive_40wire_relaxed(dev->id);
4308 return ata_drive_40wire(dev->id);
4309 }
4310
4311 /**
4312 * cable_is_40wire - 40/80/SATA decider
4313 * @ap: port to consider
4314 *
4315 * This function encapsulates the policy for speed management
4316 * in one place. At the moment we don't cache the result but
4317 * there is a good case for setting ap->cbl to the result when
4318 * we are called with unknown cables (and figuring out if it
4319 * impacts hotplug at all).
4320 *
4321 * Return 1 if the cable appears to be 40 wire.
4322 */
4323
cable_is_40wire(struct ata_port * ap)4324 static int cable_is_40wire(struct ata_port *ap)
4325 {
4326 struct ata_link *link;
4327 struct ata_device *dev;
4328
4329 /* If the controller thinks we are 40 wire, we are. */
4330 if (ap->cbl == ATA_CBL_PATA40)
4331 return 1;
4332
4333 /* If the controller thinks we are 80 wire, we are. */
4334 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4335 return 0;
4336
4337 /* If the system is known to be 40 wire short cable (eg
4338 * laptop), then we allow 80 wire modes even if the drive
4339 * isn't sure.
4340 */
4341 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4342 return 0;
4343
4344 /* If the controller doesn't know, we scan.
4345 *
4346 * Note: We look for all 40 wire detects at this point. Any
4347 * 80 wire detect is taken to be 80 wire cable because
4348 * - in many setups only the one drive (slave if present) will
4349 * give a valid detect
4350 * - if you have a non detect capable drive you don't want it
4351 * to colour the choice
4352 */
4353 ata_for_each_link(link, ap, EDGE) {
4354 ata_for_each_dev(dev, link, ENABLED) {
4355 if (!ata_is_40wire(dev))
4356 return 0;
4357 }
4358 }
4359 return 1;
4360 }
4361
4362 /**
4363 * ata_dev_xfermask - Compute supported xfermask of the given device
4364 * @dev: Device to compute xfermask for
4365 *
4366 * Compute supported xfermask of @dev and store it in
4367 * dev->*_mask. This function is responsible for applying all
4368 * known limits including host controller limits, device
4369 * blacklist, etc...
4370 *
4371 * LOCKING:
4372 * None.
4373 */
ata_dev_xfermask(struct ata_device * dev)4374 static void ata_dev_xfermask(struct ata_device *dev)
4375 {
4376 struct ata_link *link = dev->link;
4377 struct ata_port *ap = link->ap;
4378 struct ata_host *host = ap->host;
4379 unsigned int xfer_mask;
4380
4381 /* controller modes available */
4382 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4383 ap->mwdma_mask, ap->udma_mask);
4384
4385 /* drive modes available */
4386 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4387 dev->mwdma_mask, dev->udma_mask);
4388 xfer_mask &= ata_id_xfermask(dev->id);
4389
4390 /*
4391 * CFA Advanced TrueIDE timings are not allowed on a shared
4392 * cable
4393 */
4394 if (ata_dev_pair(dev)) {
4395 /* No PIO5 or PIO6 */
4396 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4397 /* No MWDMA3 or MWDMA 4 */
4398 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4399 }
4400
4401 if (ata_dma_blacklisted(dev)) {
4402 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4403 ata_dev_warn(dev,
4404 "device is on DMA blacklist, disabling DMA\n");
4405 }
4406
4407 if ((host->flags & ATA_HOST_SIMPLEX) &&
4408 host->simplex_claimed && host->simplex_claimed != ap) {
4409 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4410 ata_dev_warn(dev,
4411 "simplex DMA is claimed by other device, disabling DMA\n");
4412 }
4413
4414 if (ap->flags & ATA_FLAG_NO_IORDY)
4415 xfer_mask &= ata_pio_mask_no_iordy(dev);
4416
4417 if (ap->ops->mode_filter)
4418 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4419
4420 /* Apply cable rule here. Don't apply it early because when
4421 * we handle hot plug the cable type can itself change.
4422 * Check this last so that we know if the transfer rate was
4423 * solely limited by the cable.
4424 * Unknown or 80 wire cables reported host side are checked
4425 * drive side as well. Cases where we know a 40wire cable
4426 * is used safely for 80 are not checked here.
4427 */
4428 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4429 /* UDMA/44 or higher would be available */
4430 if (cable_is_40wire(ap)) {
4431 ata_dev_warn(dev,
4432 "limited to UDMA/33 due to 40-wire cable\n");
4433 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4434 }
4435
4436 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4437 &dev->mwdma_mask, &dev->udma_mask);
4438 }
4439
4440 /**
4441 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4442 * @dev: Device to which command will be sent
4443 *
4444 * Issue SET FEATURES - XFER MODE command to device @dev
4445 * on port @ap.
4446 *
4447 * LOCKING:
4448 * PCI/etc. bus probe sem.
4449 *
4450 * RETURNS:
4451 * 0 on success, AC_ERR_* mask otherwise.
4452 */
4453
ata_dev_set_xfermode(struct ata_device * dev)4454 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4455 {
4456 struct ata_taskfile tf;
4457
4458 /* set up set-features taskfile */
4459 ata_dev_dbg(dev, "set features - xfer mode\n");
4460
4461 /* Some controllers and ATAPI devices show flaky interrupt
4462 * behavior after setting xfer mode. Use polling instead.
4463 */
4464 ata_tf_init(dev, &tf);
4465 tf.command = ATA_CMD_SET_FEATURES;
4466 tf.feature = SETFEATURES_XFER;
4467 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4468 tf.protocol = ATA_PROT_NODATA;
4469 /* If we are using IORDY we must send the mode setting command */
4470 if (ata_pio_need_iordy(dev))
4471 tf.nsect = dev->xfer_mode;
4472 /* If the device has IORDY and the controller does not - turn it off */
4473 else if (ata_id_has_iordy(dev->id))
4474 tf.nsect = 0x01;
4475 else /* In the ancient relic department - skip all of this */
4476 return 0;
4477
4478 /*
4479 * On some disks, this command causes spin-up, so we need longer
4480 * timeout.
4481 */
4482 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 15000);
4483 }
4484
4485 /**
4486 * ata_dev_set_feature - Issue SET FEATURES
4487 * @dev: Device to which command will be sent
4488 * @subcmd: The SET FEATURES subcommand to be sent
4489 * @action: The sector count represents a subcommand specific action
4490 *
4491 * Issue SET FEATURES command to device @dev on port @ap with sector count
4492 *
4493 * LOCKING:
4494 * PCI/etc. bus probe sem.
4495 *
4496 * RETURNS:
4497 * 0 on success, AC_ERR_* mask otherwise.
4498 */
ata_dev_set_feature(struct ata_device * dev,u8 subcmd,u8 action)4499 unsigned int ata_dev_set_feature(struct ata_device *dev, u8 subcmd, u8 action)
4500 {
4501 struct ata_taskfile tf;
4502 unsigned int timeout = 0;
4503
4504 /* set up set-features taskfile */
4505 ata_dev_dbg(dev, "set features\n");
4506
4507 ata_tf_init(dev, &tf);
4508 tf.command = ATA_CMD_SET_FEATURES;
4509 tf.feature = subcmd;
4510 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4511 tf.protocol = ATA_PROT_NODATA;
4512 tf.nsect = action;
4513
4514 if (subcmd == SETFEATURES_SPINUP)
4515 timeout = ata_probe_timeout ?
4516 ata_probe_timeout * 1000 : SETFEATURES_SPINUP_TIMEOUT;
4517
4518 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, timeout);
4519 }
4520 EXPORT_SYMBOL_GPL(ata_dev_set_feature);
4521
4522 /**
4523 * ata_dev_init_params - Issue INIT DEV PARAMS command
4524 * @dev: Device to which command will be sent
4525 * @heads: Number of heads (taskfile parameter)
4526 * @sectors: Number of sectors (taskfile parameter)
4527 *
4528 * LOCKING:
4529 * Kernel thread context (may sleep)
4530 *
4531 * RETURNS:
4532 * 0 on success, AC_ERR_* mask otherwise.
4533 */
ata_dev_init_params(struct ata_device * dev,u16 heads,u16 sectors)4534 static unsigned int ata_dev_init_params(struct ata_device *dev,
4535 u16 heads, u16 sectors)
4536 {
4537 struct ata_taskfile tf;
4538 unsigned int err_mask;
4539
4540 /* Number of sectors per track 1-255. Number of heads 1-16 */
4541 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4542 return AC_ERR_INVALID;
4543
4544 /* set up init dev params taskfile */
4545 ata_dev_dbg(dev, "init dev params \n");
4546
4547 ata_tf_init(dev, &tf);
4548 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4549 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4550 tf.protocol = ATA_PROT_NODATA;
4551 tf.nsect = sectors;
4552 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4553
4554 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4555 /* A clean abort indicates an original or just out of spec drive
4556 and we should continue as we issue the setup based on the
4557 drive reported working geometry */
4558 if (err_mask == AC_ERR_DEV && (tf.error & ATA_ABORTED))
4559 err_mask = 0;
4560
4561 return err_mask;
4562 }
4563
4564 /**
4565 * atapi_check_dma - Check whether ATAPI DMA can be supported
4566 * @qc: Metadata associated with taskfile to check
4567 *
4568 * Allow low-level driver to filter ATA PACKET commands, returning
4569 * a status indicating whether or not it is OK to use DMA for the
4570 * supplied PACKET command.
4571 *
4572 * LOCKING:
4573 * spin_lock_irqsave(host lock)
4574 *
4575 * RETURNS: 0 when ATAPI DMA can be used
4576 * nonzero otherwise
4577 */
atapi_check_dma(struct ata_queued_cmd * qc)4578 int atapi_check_dma(struct ata_queued_cmd *qc)
4579 {
4580 struct ata_port *ap = qc->ap;
4581
4582 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4583 * few ATAPI devices choke on such DMA requests.
4584 */
4585 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4586 unlikely(qc->nbytes & 15))
4587 return 1;
4588
4589 if (ap->ops->check_atapi_dma)
4590 return ap->ops->check_atapi_dma(qc);
4591
4592 return 0;
4593 }
4594
4595 /**
4596 * ata_std_qc_defer - Check whether a qc needs to be deferred
4597 * @qc: ATA command in question
4598 *
4599 * Non-NCQ commands cannot run with any other command, NCQ or
4600 * not. As upper layer only knows the queue depth, we are
4601 * responsible for maintaining exclusion. This function checks
4602 * whether a new command @qc can be issued.
4603 *
4604 * LOCKING:
4605 * spin_lock_irqsave(host lock)
4606 *
4607 * RETURNS:
4608 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4609 */
ata_std_qc_defer(struct ata_queued_cmd * qc)4610 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4611 {
4612 struct ata_link *link = qc->dev->link;
4613
4614 if (ata_is_ncq(qc->tf.protocol)) {
4615 if (!ata_tag_valid(link->active_tag))
4616 return 0;
4617 } else {
4618 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4619 return 0;
4620 }
4621
4622 return ATA_DEFER_LINK;
4623 }
4624 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
4625
ata_noop_qc_prep(struct ata_queued_cmd * qc)4626 enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc)
4627 {
4628 return AC_ERR_OK;
4629 }
4630 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
4631
4632 /**
4633 * ata_sg_init - Associate command with scatter-gather table.
4634 * @qc: Command to be associated
4635 * @sg: Scatter-gather table.
4636 * @n_elem: Number of elements in s/g table.
4637 *
4638 * Initialize the data-related elements of queued_cmd @qc
4639 * to point to a scatter-gather table @sg, containing @n_elem
4640 * elements.
4641 *
4642 * LOCKING:
4643 * spin_lock_irqsave(host lock)
4644 */
ata_sg_init(struct ata_queued_cmd * qc,struct scatterlist * sg,unsigned int n_elem)4645 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4646 unsigned int n_elem)
4647 {
4648 qc->sg = sg;
4649 qc->n_elem = n_elem;
4650 qc->cursg = qc->sg;
4651 }
4652
4653 #ifdef CONFIG_HAS_DMA
4654
4655 /**
4656 * ata_sg_clean - Unmap DMA memory associated with command
4657 * @qc: Command containing DMA memory to be released
4658 *
4659 * Unmap all mapped DMA memory associated with this command.
4660 *
4661 * LOCKING:
4662 * spin_lock_irqsave(host lock)
4663 */
ata_sg_clean(struct ata_queued_cmd * qc)4664 static void ata_sg_clean(struct ata_queued_cmd *qc)
4665 {
4666 struct ata_port *ap = qc->ap;
4667 struct scatterlist *sg = qc->sg;
4668 int dir = qc->dma_dir;
4669
4670 WARN_ON_ONCE(sg == NULL);
4671
4672 if (qc->n_elem)
4673 dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
4674
4675 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4676 qc->sg = NULL;
4677 }
4678
4679 /**
4680 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4681 * @qc: Command with scatter-gather table to be mapped.
4682 *
4683 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4684 *
4685 * LOCKING:
4686 * spin_lock_irqsave(host lock)
4687 *
4688 * RETURNS:
4689 * Zero on success, negative on error.
4690 *
4691 */
ata_sg_setup(struct ata_queued_cmd * qc)4692 static int ata_sg_setup(struct ata_queued_cmd *qc)
4693 {
4694 struct ata_port *ap = qc->ap;
4695 unsigned int n_elem;
4696
4697 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4698 if (n_elem < 1)
4699 return -1;
4700
4701 qc->orig_n_elem = qc->n_elem;
4702 qc->n_elem = n_elem;
4703 qc->flags |= ATA_QCFLAG_DMAMAP;
4704
4705 return 0;
4706 }
4707
4708 #else /* !CONFIG_HAS_DMA */
4709
ata_sg_clean(struct ata_queued_cmd * qc)4710 static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}
ata_sg_setup(struct ata_queued_cmd * qc)4711 static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }
4712
4713 #endif /* !CONFIG_HAS_DMA */
4714
4715 /**
4716 * swap_buf_le16 - swap halves of 16-bit words in place
4717 * @buf: Buffer to swap
4718 * @buf_words: Number of 16-bit words in buffer.
4719 *
4720 * Swap halves of 16-bit words if needed to convert from
4721 * little-endian byte order to native cpu byte order, or
4722 * vice-versa.
4723 *
4724 * LOCKING:
4725 * Inherited from caller.
4726 */
swap_buf_le16(u16 * buf,unsigned int buf_words)4727 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4728 {
4729 #ifdef __BIG_ENDIAN
4730 unsigned int i;
4731
4732 for (i = 0; i < buf_words; i++)
4733 buf[i] = le16_to_cpu(buf[i]);
4734 #endif /* __BIG_ENDIAN */
4735 }
4736
4737 /**
4738 * ata_qc_free - free unused ata_queued_cmd
4739 * @qc: Command to complete
4740 *
4741 * Designed to free unused ata_queued_cmd object
4742 * in case something prevents using it.
4743 *
4744 * LOCKING:
4745 * spin_lock_irqsave(host lock)
4746 */
ata_qc_free(struct ata_queued_cmd * qc)4747 void ata_qc_free(struct ata_queued_cmd *qc)
4748 {
4749 qc->flags = 0;
4750 if (ata_tag_valid(qc->tag))
4751 qc->tag = ATA_TAG_POISON;
4752 }
4753
__ata_qc_complete(struct ata_queued_cmd * qc)4754 void __ata_qc_complete(struct ata_queued_cmd *qc)
4755 {
4756 struct ata_port *ap;
4757 struct ata_link *link;
4758
4759 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4760 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4761 ap = qc->ap;
4762 link = qc->dev->link;
4763
4764 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4765 ata_sg_clean(qc);
4766
4767 /* command should be marked inactive atomically with qc completion */
4768 if (ata_is_ncq(qc->tf.protocol)) {
4769 link->sactive &= ~(1 << qc->hw_tag);
4770 if (!link->sactive)
4771 ap->nr_active_links--;
4772 } else {
4773 link->active_tag = ATA_TAG_POISON;
4774 ap->nr_active_links--;
4775 }
4776
4777 /* clear exclusive status */
4778 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4779 ap->excl_link == link))
4780 ap->excl_link = NULL;
4781
4782 /* atapi: mark qc as inactive to prevent the interrupt handler
4783 * from completing the command twice later, before the error handler
4784 * is called. (when rc != 0 and atapi request sense is needed)
4785 */
4786 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4787 ap->qc_active &= ~(1ULL << qc->tag);
4788
4789 /* call completion callback */
4790 qc->complete_fn(qc);
4791 }
4792
fill_result_tf(struct ata_queued_cmd * qc)4793 static void fill_result_tf(struct ata_queued_cmd *qc)
4794 {
4795 struct ata_port *ap = qc->ap;
4796
4797 qc->result_tf.flags = qc->tf.flags;
4798 ap->ops->qc_fill_rtf(qc);
4799 }
4800
ata_verify_xfer(struct ata_queued_cmd * qc)4801 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4802 {
4803 struct ata_device *dev = qc->dev;
4804
4805 if (!ata_is_data(qc->tf.protocol))
4806 return;
4807
4808 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4809 return;
4810
4811 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4812 }
4813
4814 /**
4815 * ata_qc_complete - Complete an active ATA command
4816 * @qc: Command to complete
4817 *
4818 * Indicate to the mid and upper layers that an ATA command has
4819 * completed, with either an ok or not-ok status.
4820 *
4821 * Refrain from calling this function multiple times when
4822 * successfully completing multiple NCQ commands.
4823 * ata_qc_complete_multiple() should be used instead, which will
4824 * properly update IRQ expect state.
4825 *
4826 * LOCKING:
4827 * spin_lock_irqsave(host lock)
4828 */
ata_qc_complete(struct ata_queued_cmd * qc)4829 void ata_qc_complete(struct ata_queued_cmd *qc)
4830 {
4831 struct ata_port *ap = qc->ap;
4832 struct ata_device *dev = qc->dev;
4833 struct ata_eh_info *ehi = &dev->link->eh_info;
4834
4835 /* Trigger the LED (if available) */
4836 ledtrig_disk_activity(!!(qc->tf.flags & ATA_TFLAG_WRITE));
4837
4838 /*
4839 * In order to synchronize EH with the regular execution path, a qc that
4840 * is owned by EH is marked with ATA_QCFLAG_EH.
4841 *
4842 * The normal execution path is responsible for not accessing a qc owned
4843 * by EH. libata core enforces the rule by returning NULL from
4844 * ata_qc_from_tag() for qcs owned by EH.
4845 */
4846 if (unlikely(qc->err_mask))
4847 qc->flags |= ATA_QCFLAG_EH;
4848
4849 /*
4850 * Finish internal commands without any further processing and always
4851 * with the result TF filled.
4852 */
4853 if (unlikely(ata_tag_internal(qc->tag))) {
4854 fill_result_tf(qc);
4855 trace_ata_qc_complete_internal(qc);
4856 __ata_qc_complete(qc);
4857 return;
4858 }
4859
4860 /* Non-internal qc has failed. Fill the result TF and summon EH. */
4861 if (unlikely(qc->flags & ATA_QCFLAG_EH)) {
4862 fill_result_tf(qc);
4863 trace_ata_qc_complete_failed(qc);
4864 ata_qc_schedule_eh(qc);
4865 return;
4866 }
4867
4868 WARN_ON_ONCE(ata_port_is_frozen(ap));
4869
4870 /* read result TF if requested */
4871 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4872 fill_result_tf(qc);
4873
4874 trace_ata_qc_complete_done(qc);
4875
4876 /*
4877 * For CDL commands that completed without an error, check if we have
4878 * sense data (ATA_SENSE is set). If we do, then the command may have
4879 * been aborted by the device due to a limit timeout using the policy
4880 * 0xD. For these commands, invoke EH to get the command sense data.
4881 */
4882 if (qc->flags & ATA_QCFLAG_HAS_CDL &&
4883 qc->result_tf.status & ATA_SENSE) {
4884 /*
4885 * Tell SCSI EH to not overwrite scmd->result even if this
4886 * command is finished with result SAM_STAT_GOOD.
4887 */
4888 qc->scsicmd->flags |= SCMD_FORCE_EH_SUCCESS;
4889 qc->flags |= ATA_QCFLAG_EH_SUCCESS_CMD;
4890 ehi->dev_action[dev->devno] |= ATA_EH_GET_SUCCESS_SENSE;
4891
4892 /*
4893 * set pending so that ata_qc_schedule_eh() does not trigger
4894 * fast drain, and freeze the port.
4895 */
4896 ap->pflags |= ATA_PFLAG_EH_PENDING;
4897 ata_qc_schedule_eh(qc);
4898 return;
4899 }
4900
4901 /* Some commands need post-processing after successful completion. */
4902 switch (qc->tf.command) {
4903 case ATA_CMD_SET_FEATURES:
4904 if (qc->tf.feature != SETFEATURES_WC_ON &&
4905 qc->tf.feature != SETFEATURES_WC_OFF &&
4906 qc->tf.feature != SETFEATURES_RA_ON &&
4907 qc->tf.feature != SETFEATURES_RA_OFF)
4908 break;
4909 fallthrough;
4910 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4911 case ATA_CMD_SET_MULTI: /* multi_count changed */
4912 /* revalidate device */
4913 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4914 ata_port_schedule_eh(ap);
4915 break;
4916
4917 case ATA_CMD_SLEEP:
4918 dev->flags |= ATA_DFLAG_SLEEPING;
4919 break;
4920 }
4921
4922 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4923 ata_verify_xfer(qc);
4924
4925 __ata_qc_complete(qc);
4926 }
4927 EXPORT_SYMBOL_GPL(ata_qc_complete);
4928
4929 /**
4930 * ata_qc_get_active - get bitmask of active qcs
4931 * @ap: port in question
4932 *
4933 * LOCKING:
4934 * spin_lock_irqsave(host lock)
4935 *
4936 * RETURNS:
4937 * Bitmask of active qcs
4938 */
ata_qc_get_active(struct ata_port * ap)4939 u64 ata_qc_get_active(struct ata_port *ap)
4940 {
4941 u64 qc_active = ap->qc_active;
4942
4943 /* ATA_TAG_INTERNAL is sent to hw as tag 0 */
4944 if (qc_active & (1ULL << ATA_TAG_INTERNAL)) {
4945 qc_active |= (1 << 0);
4946 qc_active &= ~(1ULL << ATA_TAG_INTERNAL);
4947 }
4948
4949 return qc_active;
4950 }
4951 EXPORT_SYMBOL_GPL(ata_qc_get_active);
4952
4953 /**
4954 * ata_qc_issue - issue taskfile to device
4955 * @qc: command to issue to device
4956 *
4957 * Prepare an ATA command to submission to device.
4958 * This includes mapping the data into a DMA-able
4959 * area, filling in the S/G table, and finally
4960 * writing the taskfile to hardware, starting the command.
4961 *
4962 * LOCKING:
4963 * spin_lock_irqsave(host lock)
4964 */
ata_qc_issue(struct ata_queued_cmd * qc)4965 void ata_qc_issue(struct ata_queued_cmd *qc)
4966 {
4967 struct ata_port *ap = qc->ap;
4968 struct ata_link *link = qc->dev->link;
4969 u8 prot = qc->tf.protocol;
4970
4971 /* Make sure only one non-NCQ command is outstanding. */
4972 WARN_ON_ONCE(ata_tag_valid(link->active_tag));
4973
4974 if (ata_is_ncq(prot)) {
4975 WARN_ON_ONCE(link->sactive & (1 << qc->hw_tag));
4976
4977 if (!link->sactive)
4978 ap->nr_active_links++;
4979 link->sactive |= 1 << qc->hw_tag;
4980 } else {
4981 WARN_ON_ONCE(link->sactive);
4982
4983 ap->nr_active_links++;
4984 link->active_tag = qc->tag;
4985 }
4986
4987 qc->flags |= ATA_QCFLAG_ACTIVE;
4988 ap->qc_active |= 1ULL << qc->tag;
4989
4990 /*
4991 * We guarantee to LLDs that they will have at least one
4992 * non-zero sg if the command is a data command.
4993 */
4994 if (ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes))
4995 goto sys_err;
4996
4997 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
4998 (ap->flags & ATA_FLAG_PIO_DMA)))
4999 if (ata_sg_setup(qc))
5000 goto sys_err;
5001
5002 /* if device is sleeping, schedule reset and abort the link */
5003 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5004 link->eh_info.action |= ATA_EH_RESET;
5005 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5006 ata_link_abort(link);
5007 return;
5008 }
5009
5010 trace_ata_qc_prep(qc);
5011 qc->err_mask |= ap->ops->qc_prep(qc);
5012 if (unlikely(qc->err_mask))
5013 goto err;
5014 trace_ata_qc_issue(qc);
5015 qc->err_mask |= ap->ops->qc_issue(qc);
5016 if (unlikely(qc->err_mask))
5017 goto err;
5018 return;
5019
5020 sys_err:
5021 qc->err_mask |= AC_ERR_SYSTEM;
5022 err:
5023 ata_qc_complete(qc);
5024 }
5025
5026 /**
5027 * ata_phys_link_online - test whether the given link is online
5028 * @link: ATA link to test
5029 *
5030 * Test whether @link is online. Note that this function returns
5031 * 0 if online status of @link cannot be obtained, so
5032 * ata_link_online(link) != !ata_link_offline(link).
5033 *
5034 * LOCKING:
5035 * None.
5036 *
5037 * RETURNS:
5038 * True if the port online status is available and online.
5039 */
ata_phys_link_online(struct ata_link * link)5040 bool ata_phys_link_online(struct ata_link *link)
5041 {
5042 u32 sstatus;
5043
5044 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5045 ata_sstatus_online(sstatus))
5046 return true;
5047 return false;
5048 }
5049
5050 /**
5051 * ata_phys_link_offline - test whether the given link is offline
5052 * @link: ATA link to test
5053 *
5054 * Test whether @link is offline. Note that this function
5055 * returns 0 if offline status of @link cannot be obtained, so
5056 * ata_link_online(link) != !ata_link_offline(link).
5057 *
5058 * LOCKING:
5059 * None.
5060 *
5061 * RETURNS:
5062 * True if the port offline status is available and offline.
5063 */
ata_phys_link_offline(struct ata_link * link)5064 bool ata_phys_link_offline(struct ata_link *link)
5065 {
5066 u32 sstatus;
5067
5068 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5069 !ata_sstatus_online(sstatus))
5070 return true;
5071 return false;
5072 }
5073
5074 /**
5075 * ata_link_online - test whether the given link is online
5076 * @link: ATA link to test
5077 *
5078 * Test whether @link is online. This is identical to
5079 * ata_phys_link_online() when there's no slave link. When
5080 * there's a slave link, this function should only be called on
5081 * the master link and will return true if any of M/S links is
5082 * online.
5083 *
5084 * LOCKING:
5085 * None.
5086 *
5087 * RETURNS:
5088 * True if the port online status is available and online.
5089 */
ata_link_online(struct ata_link * link)5090 bool ata_link_online(struct ata_link *link)
5091 {
5092 struct ata_link *slave = link->ap->slave_link;
5093
5094 WARN_ON(link == slave); /* shouldn't be called on slave link */
5095
5096 return ata_phys_link_online(link) ||
5097 (slave && ata_phys_link_online(slave));
5098 }
5099 EXPORT_SYMBOL_GPL(ata_link_online);
5100
5101 /**
5102 * ata_link_offline - test whether the given link is offline
5103 * @link: ATA link to test
5104 *
5105 * Test whether @link is offline. This is identical to
5106 * ata_phys_link_offline() when there's no slave link. When
5107 * there's a slave link, this function should only be called on
5108 * the master link and will return true if both M/S links are
5109 * offline.
5110 *
5111 * LOCKING:
5112 * None.
5113 *
5114 * RETURNS:
5115 * True if the port offline status is available and offline.
5116 */
ata_link_offline(struct ata_link * link)5117 bool ata_link_offline(struct ata_link *link)
5118 {
5119 struct ata_link *slave = link->ap->slave_link;
5120
5121 WARN_ON(link == slave); /* shouldn't be called on slave link */
5122
5123 return ata_phys_link_offline(link) &&
5124 (!slave || ata_phys_link_offline(slave));
5125 }
5126 EXPORT_SYMBOL_GPL(ata_link_offline);
5127
5128 #ifdef CONFIG_PM
ata_port_request_pm(struct ata_port * ap,pm_message_t mesg,unsigned int action,unsigned int ehi_flags,bool async)5129 static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg,
5130 unsigned int action, unsigned int ehi_flags,
5131 bool async)
5132 {
5133 struct ata_link *link;
5134 unsigned long flags;
5135
5136 spin_lock_irqsave(ap->lock, flags);
5137
5138 /*
5139 * A previous PM operation might still be in progress. Wait for
5140 * ATA_PFLAG_PM_PENDING to clear.
5141 */
5142 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5143 spin_unlock_irqrestore(ap->lock, flags);
5144 ata_port_wait_eh(ap);
5145 spin_lock_irqsave(ap->lock, flags);
5146 }
5147
5148 /* Request PM operation to EH */
5149 ap->pm_mesg = mesg;
5150 ap->pflags |= ATA_PFLAG_PM_PENDING;
5151 ata_for_each_link(link, ap, HOST_FIRST) {
5152 link->eh_info.action |= action;
5153 link->eh_info.flags |= ehi_flags;
5154 }
5155
5156 ata_port_schedule_eh(ap);
5157
5158 spin_unlock_irqrestore(ap->lock, flags);
5159
5160 if (!async)
5161 ata_port_wait_eh(ap);
5162 }
5163
ata_port_suspend(struct ata_port * ap,pm_message_t mesg,bool async)5164 static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg,
5165 bool async)
5166 {
5167 /*
5168 * We are about to suspend the port, so we do not care about
5169 * scsi_rescan_device() calls scheduled by previous resume operations.
5170 * The next resume will schedule the rescan again. So cancel any rescan
5171 * that is not done yet.
5172 */
5173 cancel_delayed_work_sync(&ap->scsi_rescan_task);
5174
5175 /*
5176 * On some hardware, device fails to respond after spun down for
5177 * suspend. As the device will not be used until being resumed, we
5178 * do not need to touch the device. Ask EH to skip the usual stuff
5179 * and proceed directly to suspend.
5180 *
5181 * http://thread.gmane.org/gmane.linux.ide/46764
5182 */
5183 ata_port_request_pm(ap, mesg, 0,
5184 ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY |
5185 ATA_EHI_NO_RECOVERY,
5186 async);
5187 }
5188
ata_port_pm_suspend(struct device * dev)5189 static int ata_port_pm_suspend(struct device *dev)
5190 {
5191 struct ata_port *ap = to_ata_port(dev);
5192
5193 if (pm_runtime_suspended(dev))
5194 return 0;
5195
5196 ata_port_suspend(ap, PMSG_SUSPEND, false);
5197 return 0;
5198 }
5199
ata_port_pm_freeze(struct device * dev)5200 static int ata_port_pm_freeze(struct device *dev)
5201 {
5202 struct ata_port *ap = to_ata_port(dev);
5203
5204 if (pm_runtime_suspended(dev))
5205 return 0;
5206
5207 ata_port_suspend(ap, PMSG_FREEZE, false);
5208 return 0;
5209 }
5210
ata_port_pm_poweroff(struct device * dev)5211 static int ata_port_pm_poweroff(struct device *dev)
5212 {
5213 if (!pm_runtime_suspended(dev))
5214 ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false);
5215 return 0;
5216 }
5217
ata_port_resume(struct ata_port * ap,pm_message_t mesg,bool async)5218 static void ata_port_resume(struct ata_port *ap, pm_message_t mesg,
5219 bool async)
5220 {
5221 ata_port_request_pm(ap, mesg, ATA_EH_RESET,
5222 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
5223 async);
5224 }
5225
ata_port_pm_resume(struct device * dev)5226 static int ata_port_pm_resume(struct device *dev)
5227 {
5228 if (!pm_runtime_suspended(dev))
5229 ata_port_resume(to_ata_port(dev), PMSG_RESUME, true);
5230 return 0;
5231 }
5232
5233 /*
5234 * For ODDs, the upper layer will poll for media change every few seconds,
5235 * which will make it enter and leave suspend state every few seconds. And
5236 * as each suspend will cause a hard/soft reset, the gain of runtime suspend
5237 * is very little and the ODD may malfunction after constantly being reset.
5238 * So the idle callback here will not proceed to suspend if a non-ZPODD capable
5239 * ODD is attached to the port.
5240 */
ata_port_runtime_idle(struct device * dev)5241 static int ata_port_runtime_idle(struct device *dev)
5242 {
5243 struct ata_port *ap = to_ata_port(dev);
5244 struct ata_link *link;
5245 struct ata_device *adev;
5246
5247 ata_for_each_link(link, ap, HOST_FIRST) {
5248 ata_for_each_dev(adev, link, ENABLED)
5249 if (adev->class == ATA_DEV_ATAPI &&
5250 !zpodd_dev_enabled(adev))
5251 return -EBUSY;
5252 }
5253
5254 return 0;
5255 }
5256
ata_port_runtime_suspend(struct device * dev)5257 static int ata_port_runtime_suspend(struct device *dev)
5258 {
5259 ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND, false);
5260 return 0;
5261 }
5262
ata_port_runtime_resume(struct device * dev)5263 static int ata_port_runtime_resume(struct device *dev)
5264 {
5265 ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME, false);
5266 return 0;
5267 }
5268
5269 static const struct dev_pm_ops ata_port_pm_ops = {
5270 .suspend = ata_port_pm_suspend,
5271 .resume = ata_port_pm_resume,
5272 .freeze = ata_port_pm_freeze,
5273 .thaw = ata_port_pm_resume,
5274 .poweroff = ata_port_pm_poweroff,
5275 .restore = ata_port_pm_resume,
5276
5277 .runtime_suspend = ata_port_runtime_suspend,
5278 .runtime_resume = ata_port_runtime_resume,
5279 .runtime_idle = ata_port_runtime_idle,
5280 };
5281
5282 /* sas ports don't participate in pm runtime management of ata_ports,
5283 * and need to resume ata devices at the domain level, not the per-port
5284 * level. sas suspend/resume is async to allow parallel port recovery
5285 * since sas has multiple ata_port instances per Scsi_Host.
5286 */
ata_sas_port_suspend(struct ata_port * ap)5287 void ata_sas_port_suspend(struct ata_port *ap)
5288 {
5289 ata_port_suspend(ap, PMSG_SUSPEND, true);
5290 }
5291 EXPORT_SYMBOL_GPL(ata_sas_port_suspend);
5292
ata_sas_port_resume(struct ata_port * ap)5293 void ata_sas_port_resume(struct ata_port *ap)
5294 {
5295 ata_port_resume(ap, PMSG_RESUME, true);
5296 }
5297 EXPORT_SYMBOL_GPL(ata_sas_port_resume);
5298
5299 /**
5300 * ata_host_suspend - suspend host
5301 * @host: host to suspend
5302 * @mesg: PM message
5303 *
5304 * Suspend @host. Actual operation is performed by port suspend.
5305 */
ata_host_suspend(struct ata_host * host,pm_message_t mesg)5306 void ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5307 {
5308 host->dev->power.power_state = mesg;
5309 }
5310 EXPORT_SYMBOL_GPL(ata_host_suspend);
5311
5312 /**
5313 * ata_host_resume - resume host
5314 * @host: host to resume
5315 *
5316 * Resume @host. Actual operation is performed by port resume.
5317 */
ata_host_resume(struct ata_host * host)5318 void ata_host_resume(struct ata_host *host)
5319 {
5320 host->dev->power.power_state = PMSG_ON;
5321 }
5322 EXPORT_SYMBOL_GPL(ata_host_resume);
5323 #endif
5324
5325 const struct device_type ata_port_type = {
5326 .name = ATA_PORT_TYPE_NAME,
5327 #ifdef CONFIG_PM
5328 .pm = &ata_port_pm_ops,
5329 #endif
5330 };
5331
5332 /**
5333 * ata_dev_init - Initialize an ata_device structure
5334 * @dev: Device structure to initialize
5335 *
5336 * Initialize @dev in preparation for probing.
5337 *
5338 * LOCKING:
5339 * Inherited from caller.
5340 */
ata_dev_init(struct ata_device * dev)5341 void ata_dev_init(struct ata_device *dev)
5342 {
5343 struct ata_link *link = ata_dev_phys_link(dev);
5344 struct ata_port *ap = link->ap;
5345 unsigned long flags;
5346
5347 /* SATA spd limit is bound to the attached device, reset together */
5348 link->sata_spd_limit = link->hw_sata_spd_limit;
5349 link->sata_spd = 0;
5350
5351 /* High bits of dev->flags are used to record warm plug
5352 * requests which occur asynchronously. Synchronize using
5353 * host lock.
5354 */
5355 spin_lock_irqsave(ap->lock, flags);
5356 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5357 dev->horkage = 0;
5358 spin_unlock_irqrestore(ap->lock, flags);
5359
5360 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5361 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5362 dev->pio_mask = UINT_MAX;
5363 dev->mwdma_mask = UINT_MAX;
5364 dev->udma_mask = UINT_MAX;
5365 }
5366
5367 /**
5368 * ata_link_init - Initialize an ata_link structure
5369 * @ap: ATA port link is attached to
5370 * @link: Link structure to initialize
5371 * @pmp: Port multiplier port number
5372 *
5373 * Initialize @link.
5374 *
5375 * LOCKING:
5376 * Kernel thread context (may sleep)
5377 */
ata_link_init(struct ata_port * ap,struct ata_link * link,int pmp)5378 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5379 {
5380 int i;
5381
5382 /* clear everything except for devices */
5383 memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
5384 ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
5385
5386 link->ap = ap;
5387 link->pmp = pmp;
5388 link->active_tag = ATA_TAG_POISON;
5389 link->hw_sata_spd_limit = UINT_MAX;
5390
5391 /* can't use iterator, ap isn't initialized yet */
5392 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5393 struct ata_device *dev = &link->device[i];
5394
5395 dev->link = link;
5396 dev->devno = dev - link->device;
5397 #ifdef CONFIG_ATA_ACPI
5398 dev->gtf_filter = ata_acpi_gtf_filter;
5399 #endif
5400 ata_dev_init(dev);
5401 }
5402 }
5403
5404 /**
5405 * sata_link_init_spd - Initialize link->sata_spd_limit
5406 * @link: Link to configure sata_spd_limit for
5407 *
5408 * Initialize ``link->[hw_]sata_spd_limit`` to the currently
5409 * configured value.
5410 *
5411 * LOCKING:
5412 * Kernel thread context (may sleep).
5413 *
5414 * RETURNS:
5415 * 0 on success, -errno on failure.
5416 */
sata_link_init_spd(struct ata_link * link)5417 int sata_link_init_spd(struct ata_link *link)
5418 {
5419 u8 spd;
5420 int rc;
5421
5422 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5423 if (rc)
5424 return rc;
5425
5426 spd = (link->saved_scontrol >> 4) & 0xf;
5427 if (spd)
5428 link->hw_sata_spd_limit &= (1 << spd) - 1;
5429
5430 ata_force_link_limits(link);
5431
5432 link->sata_spd_limit = link->hw_sata_spd_limit;
5433
5434 return 0;
5435 }
5436
5437 /**
5438 * ata_port_alloc - allocate and initialize basic ATA port resources
5439 * @host: ATA host this allocated port belongs to
5440 *
5441 * Allocate and initialize basic ATA port resources.
5442 *
5443 * RETURNS:
5444 * Allocate ATA port on success, NULL on failure.
5445 *
5446 * LOCKING:
5447 * Inherited from calling layer (may sleep).
5448 */
ata_port_alloc(struct ata_host * host)5449 struct ata_port *ata_port_alloc(struct ata_host *host)
5450 {
5451 struct ata_port *ap;
5452
5453 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5454 if (!ap)
5455 return NULL;
5456
5457 ap->pflags |= ATA_PFLAG_INITIALIZING | ATA_PFLAG_FROZEN;
5458 ap->lock = &host->lock;
5459 ap->print_id = -1;
5460 ap->local_port_no = -1;
5461 ap->host = host;
5462 ap->dev = host->dev;
5463
5464 mutex_init(&ap->scsi_scan_mutex);
5465 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5466 INIT_DELAYED_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5467 INIT_LIST_HEAD(&ap->eh_done_q);
5468 init_waitqueue_head(&ap->eh_wait_q);
5469 init_completion(&ap->park_req_pending);
5470 timer_setup(&ap->fastdrain_timer, ata_eh_fastdrain_timerfn,
5471 TIMER_DEFERRABLE);
5472
5473 ap->cbl = ATA_CBL_NONE;
5474
5475 ata_link_init(ap, &ap->link, 0);
5476
5477 #ifdef ATA_IRQ_TRAP
5478 ap->stats.unhandled_irq = 1;
5479 ap->stats.idle_irq = 1;
5480 #endif
5481 ata_sff_port_init(ap);
5482
5483 return ap;
5484 }
5485
ata_devres_release(struct device * gendev,void * res)5486 static void ata_devres_release(struct device *gendev, void *res)
5487 {
5488 struct ata_host *host = dev_get_drvdata(gendev);
5489 int i;
5490
5491 for (i = 0; i < host->n_ports; i++) {
5492 struct ata_port *ap = host->ports[i];
5493
5494 if (!ap)
5495 continue;
5496
5497 if (ap->scsi_host)
5498 scsi_host_put(ap->scsi_host);
5499
5500 }
5501
5502 dev_set_drvdata(gendev, NULL);
5503 ata_host_put(host);
5504 }
5505
ata_host_release(struct kref * kref)5506 static void ata_host_release(struct kref *kref)
5507 {
5508 struct ata_host *host = container_of(kref, struct ata_host, kref);
5509 int i;
5510
5511 for (i = 0; i < host->n_ports; i++) {
5512 struct ata_port *ap = host->ports[i];
5513
5514 kfree(ap->pmp_link);
5515 kfree(ap->slave_link);
5516 kfree(ap->ncq_sense_buf);
5517 kfree(ap);
5518 host->ports[i] = NULL;
5519 }
5520 kfree(host);
5521 }
5522
ata_host_get(struct ata_host * host)5523 void ata_host_get(struct ata_host *host)
5524 {
5525 kref_get(&host->kref);
5526 }
5527
ata_host_put(struct ata_host * host)5528 void ata_host_put(struct ata_host *host)
5529 {
5530 kref_put(&host->kref, ata_host_release);
5531 }
5532 EXPORT_SYMBOL_GPL(ata_host_put);
5533
5534 /**
5535 * ata_host_alloc - allocate and init basic ATA host resources
5536 * @dev: generic device this host is associated with
5537 * @max_ports: maximum number of ATA ports associated with this host
5538 *
5539 * Allocate and initialize basic ATA host resources. LLD calls
5540 * this function to allocate a host, initializes it fully and
5541 * attaches it using ata_host_register().
5542 *
5543 * @max_ports ports are allocated and host->n_ports is
5544 * initialized to @max_ports. The caller is allowed to decrease
5545 * host->n_ports before calling ata_host_register(). The unused
5546 * ports will be automatically freed on registration.
5547 *
5548 * RETURNS:
5549 * Allocate ATA host on success, NULL on failure.
5550 *
5551 * LOCKING:
5552 * Inherited from calling layer (may sleep).
5553 */
ata_host_alloc(struct device * dev,int max_ports)5554 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5555 {
5556 struct ata_host *host;
5557 size_t sz;
5558 int i;
5559 void *dr;
5560
5561 /* alloc a container for our list of ATA ports (buses) */
5562 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5563 host = kzalloc(sz, GFP_KERNEL);
5564 if (!host)
5565 return NULL;
5566
5567 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5568 goto err_free;
5569
5570 dr = devres_alloc(ata_devres_release, 0, GFP_KERNEL);
5571 if (!dr)
5572 goto err_out;
5573
5574 devres_add(dev, dr);
5575 dev_set_drvdata(dev, host);
5576
5577 spin_lock_init(&host->lock);
5578 mutex_init(&host->eh_mutex);
5579 host->dev = dev;
5580 host->n_ports = max_ports;
5581 kref_init(&host->kref);
5582
5583 /* allocate ports bound to this host */
5584 for (i = 0; i < max_ports; i++) {
5585 struct ata_port *ap;
5586
5587 ap = ata_port_alloc(host);
5588 if (!ap)
5589 goto err_out;
5590
5591 ap->port_no = i;
5592 host->ports[i] = ap;
5593 }
5594
5595 devres_remove_group(dev, NULL);
5596 return host;
5597
5598 err_out:
5599 devres_release_group(dev, NULL);
5600 err_free:
5601 kfree(host);
5602 return NULL;
5603 }
5604 EXPORT_SYMBOL_GPL(ata_host_alloc);
5605
5606 /**
5607 * ata_host_alloc_pinfo - alloc host and init with port_info array
5608 * @dev: generic device this host is associated with
5609 * @ppi: array of ATA port_info to initialize host with
5610 * @n_ports: number of ATA ports attached to this host
5611 *
5612 * Allocate ATA host and initialize with info from @ppi. If NULL
5613 * terminated, @ppi may contain fewer entries than @n_ports. The
5614 * last entry will be used for the remaining ports.
5615 *
5616 * RETURNS:
5617 * Allocate ATA host on success, NULL on failure.
5618 *
5619 * LOCKING:
5620 * Inherited from calling layer (may sleep).
5621 */
ata_host_alloc_pinfo(struct device * dev,const struct ata_port_info * const * ppi,int n_ports)5622 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5623 const struct ata_port_info * const * ppi,
5624 int n_ports)
5625 {
5626 const struct ata_port_info *pi = &ata_dummy_port_info;
5627 struct ata_host *host;
5628 int i, j;
5629
5630 host = ata_host_alloc(dev, n_ports);
5631 if (!host)
5632 return NULL;
5633
5634 for (i = 0, j = 0; i < host->n_ports; i++) {
5635 struct ata_port *ap = host->ports[i];
5636
5637 if (ppi[j])
5638 pi = ppi[j++];
5639
5640 ap->pio_mask = pi->pio_mask;
5641 ap->mwdma_mask = pi->mwdma_mask;
5642 ap->udma_mask = pi->udma_mask;
5643 ap->flags |= pi->flags;
5644 ap->link.flags |= pi->link_flags;
5645 ap->ops = pi->port_ops;
5646
5647 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5648 host->ops = pi->port_ops;
5649 }
5650
5651 return host;
5652 }
5653 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
5654
ata_host_stop(struct device * gendev,void * res)5655 static void ata_host_stop(struct device *gendev, void *res)
5656 {
5657 struct ata_host *host = dev_get_drvdata(gendev);
5658 int i;
5659
5660 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5661
5662 for (i = 0; i < host->n_ports; i++) {
5663 struct ata_port *ap = host->ports[i];
5664
5665 if (ap->ops->port_stop)
5666 ap->ops->port_stop(ap);
5667 }
5668
5669 if (host->ops->host_stop)
5670 host->ops->host_stop(host);
5671 }
5672
5673 /**
5674 * ata_finalize_port_ops - finalize ata_port_operations
5675 * @ops: ata_port_operations to finalize
5676 *
5677 * An ata_port_operations can inherit from another ops and that
5678 * ops can again inherit from another. This can go on as many
5679 * times as necessary as long as there is no loop in the
5680 * inheritance chain.
5681 *
5682 * Ops tables are finalized when the host is started. NULL or
5683 * unspecified entries are inherited from the closet ancestor
5684 * which has the method and the entry is populated with it.
5685 * After finalization, the ops table directly points to all the
5686 * methods and ->inherits is no longer necessary and cleared.
5687 *
5688 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5689 *
5690 * LOCKING:
5691 * None.
5692 */
ata_finalize_port_ops(struct ata_port_operations * ops)5693 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5694 {
5695 static DEFINE_SPINLOCK(lock);
5696 const struct ata_port_operations *cur;
5697 void **begin = (void **)ops;
5698 void **end = (void **)&ops->inherits;
5699 void **pp;
5700
5701 if (!ops || !ops->inherits)
5702 return;
5703
5704 spin_lock(&lock);
5705
5706 for (cur = ops->inherits; cur; cur = cur->inherits) {
5707 void **inherit = (void **)cur;
5708
5709 for (pp = begin; pp < end; pp++, inherit++)
5710 if (!*pp)
5711 *pp = *inherit;
5712 }
5713
5714 for (pp = begin; pp < end; pp++)
5715 if (IS_ERR(*pp))
5716 *pp = NULL;
5717
5718 ops->inherits = NULL;
5719
5720 spin_unlock(&lock);
5721 }
5722
5723 /**
5724 * ata_host_start - start and freeze ports of an ATA host
5725 * @host: ATA host to start ports for
5726 *
5727 * Start and then freeze ports of @host. Started status is
5728 * recorded in host->flags, so this function can be called
5729 * multiple times. Ports are guaranteed to get started only
5730 * once. If host->ops is not initialized yet, it is set to the
5731 * first non-dummy port ops.
5732 *
5733 * LOCKING:
5734 * Inherited from calling layer (may sleep).
5735 *
5736 * RETURNS:
5737 * 0 if all ports are started successfully, -errno otherwise.
5738 */
ata_host_start(struct ata_host * host)5739 int ata_host_start(struct ata_host *host)
5740 {
5741 int have_stop = 0;
5742 void *start_dr = NULL;
5743 int i, rc;
5744
5745 if (host->flags & ATA_HOST_STARTED)
5746 return 0;
5747
5748 ata_finalize_port_ops(host->ops);
5749
5750 for (i = 0; i < host->n_ports; i++) {
5751 struct ata_port *ap = host->ports[i];
5752
5753 ata_finalize_port_ops(ap->ops);
5754
5755 if (!host->ops && !ata_port_is_dummy(ap))
5756 host->ops = ap->ops;
5757
5758 if (ap->ops->port_stop)
5759 have_stop = 1;
5760 }
5761
5762 if (host->ops && host->ops->host_stop)
5763 have_stop = 1;
5764
5765 if (have_stop) {
5766 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5767 if (!start_dr)
5768 return -ENOMEM;
5769 }
5770
5771 for (i = 0; i < host->n_ports; i++) {
5772 struct ata_port *ap = host->ports[i];
5773
5774 if (ap->ops->port_start) {
5775 rc = ap->ops->port_start(ap);
5776 if (rc) {
5777 if (rc != -ENODEV)
5778 dev_err(host->dev,
5779 "failed to start port %d (errno=%d)\n",
5780 i, rc);
5781 goto err_out;
5782 }
5783 }
5784 ata_eh_freeze_port(ap);
5785 }
5786
5787 if (start_dr)
5788 devres_add(host->dev, start_dr);
5789 host->flags |= ATA_HOST_STARTED;
5790 return 0;
5791
5792 err_out:
5793 while (--i >= 0) {
5794 struct ata_port *ap = host->ports[i];
5795
5796 if (ap->ops->port_stop)
5797 ap->ops->port_stop(ap);
5798 }
5799 devres_free(start_dr);
5800 return rc;
5801 }
5802 EXPORT_SYMBOL_GPL(ata_host_start);
5803
5804 /**
5805 * ata_host_init - Initialize a host struct for sas (ipr, libsas)
5806 * @host: host to initialize
5807 * @dev: device host is attached to
5808 * @ops: port_ops
5809 *
5810 */
ata_host_init(struct ata_host * host,struct device * dev,struct ata_port_operations * ops)5811 void ata_host_init(struct ata_host *host, struct device *dev,
5812 struct ata_port_operations *ops)
5813 {
5814 spin_lock_init(&host->lock);
5815 mutex_init(&host->eh_mutex);
5816 host->n_tags = ATA_MAX_QUEUE;
5817 host->dev = dev;
5818 host->ops = ops;
5819 kref_init(&host->kref);
5820 }
5821 EXPORT_SYMBOL_GPL(ata_host_init);
5822
ata_port_probe(struct ata_port * ap)5823 void ata_port_probe(struct ata_port *ap)
5824 {
5825 struct ata_eh_info *ehi = &ap->link.eh_info;
5826 unsigned long flags;
5827
5828 /* kick EH for boot probing */
5829 spin_lock_irqsave(ap->lock, flags);
5830
5831 ehi->probe_mask |= ATA_ALL_DEVICES;
5832 ehi->action |= ATA_EH_RESET;
5833 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5834
5835 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5836 ap->pflags |= ATA_PFLAG_LOADING;
5837 ata_port_schedule_eh(ap);
5838
5839 spin_unlock_irqrestore(ap->lock, flags);
5840 }
5841 EXPORT_SYMBOL_GPL(ata_port_probe);
5842
async_port_probe(void * data,async_cookie_t cookie)5843 static void async_port_probe(void *data, async_cookie_t cookie)
5844 {
5845 struct ata_port *ap = data;
5846
5847 /*
5848 * If we're not allowed to scan this host in parallel,
5849 * we need to wait until all previous scans have completed
5850 * before going further.
5851 * Jeff Garzik says this is only within a controller, so we
5852 * don't need to wait for port 0, only for later ports.
5853 */
5854 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5855 async_synchronize_cookie(cookie);
5856
5857 ata_port_probe(ap);
5858 ata_port_wait_eh(ap);
5859
5860 /* in order to keep device order, we need to synchronize at this point */
5861 async_synchronize_cookie(cookie);
5862
5863 ata_scsi_scan_host(ap, 1);
5864 }
5865
5866 /**
5867 * ata_host_register - register initialized ATA host
5868 * @host: ATA host to register
5869 * @sht: template for SCSI host
5870 *
5871 * Register initialized ATA host. @host is allocated using
5872 * ata_host_alloc() and fully initialized by LLD. This function
5873 * starts ports, registers @host with ATA and SCSI layers and
5874 * probe registered devices.
5875 *
5876 * LOCKING:
5877 * Inherited from calling layer (may sleep).
5878 *
5879 * RETURNS:
5880 * 0 on success, -errno otherwise.
5881 */
ata_host_register(struct ata_host * host,const struct scsi_host_template * sht)5882 int ata_host_register(struct ata_host *host, const struct scsi_host_template *sht)
5883 {
5884 int i, rc;
5885
5886 host->n_tags = clamp(sht->can_queue, 1, ATA_MAX_QUEUE);
5887
5888 /* host must have been started */
5889 if (!(host->flags & ATA_HOST_STARTED)) {
5890 dev_err(host->dev, "BUG: trying to register unstarted host\n");
5891 WARN_ON(1);
5892 return -EINVAL;
5893 }
5894
5895 /* Blow away unused ports. This happens when LLD can't
5896 * determine the exact number of ports to allocate at
5897 * allocation time.
5898 */
5899 for (i = host->n_ports; host->ports[i]; i++)
5900 kfree(host->ports[i]);
5901
5902 /* give ports names and add SCSI hosts */
5903 for (i = 0; i < host->n_ports; i++) {
5904 host->ports[i]->print_id = atomic_inc_return(&ata_print_id);
5905 host->ports[i]->local_port_no = i + 1;
5906 }
5907
5908 /* Create associated sysfs transport objects */
5909 for (i = 0; i < host->n_ports; i++) {
5910 rc = ata_tport_add(host->dev,host->ports[i]);
5911 if (rc) {
5912 goto err_tadd;
5913 }
5914 }
5915
5916 rc = ata_scsi_add_hosts(host, sht);
5917 if (rc)
5918 goto err_tadd;
5919
5920 /* set cable, sata_spd_limit and report */
5921 for (i = 0; i < host->n_ports; i++) {
5922 struct ata_port *ap = host->ports[i];
5923 unsigned int xfer_mask;
5924
5925 /* set SATA cable type if still unset */
5926 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
5927 ap->cbl = ATA_CBL_SATA;
5928
5929 /* init sata_spd_limit to the current value */
5930 sata_link_init_spd(&ap->link);
5931 if (ap->slave_link)
5932 sata_link_init_spd(ap->slave_link);
5933
5934 /* print per-port info to dmesg */
5935 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
5936 ap->udma_mask);
5937
5938 if (!ata_port_is_dummy(ap)) {
5939 ata_port_info(ap, "%cATA max %s %s\n",
5940 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
5941 ata_mode_string(xfer_mask),
5942 ap->link.eh_info.desc);
5943 ata_ehi_clear_desc(&ap->link.eh_info);
5944 } else
5945 ata_port_info(ap, "DUMMY\n");
5946 }
5947
5948 /* perform each probe asynchronously */
5949 for (i = 0; i < host->n_ports; i++) {
5950 struct ata_port *ap = host->ports[i];
5951 ap->cookie = async_schedule(async_port_probe, ap);
5952 }
5953
5954 return 0;
5955
5956 err_tadd:
5957 while (--i >= 0) {
5958 ata_tport_delete(host->ports[i]);
5959 }
5960 return rc;
5961
5962 }
5963 EXPORT_SYMBOL_GPL(ata_host_register);
5964
5965 /**
5966 * ata_host_activate - start host, request IRQ and register it
5967 * @host: target ATA host
5968 * @irq: IRQ to request
5969 * @irq_handler: irq_handler used when requesting IRQ
5970 * @irq_flags: irq_flags used when requesting IRQ
5971 * @sht: scsi_host_template to use when registering the host
5972 *
5973 * After allocating an ATA host and initializing it, most libata
5974 * LLDs perform three steps to activate the host - start host,
5975 * request IRQ and register it. This helper takes necessary
5976 * arguments and performs the three steps in one go.
5977 *
5978 * An invalid IRQ skips the IRQ registration and expects the host to
5979 * have set polling mode on the port. In this case, @irq_handler
5980 * should be NULL.
5981 *
5982 * LOCKING:
5983 * Inherited from calling layer (may sleep).
5984 *
5985 * RETURNS:
5986 * 0 on success, -errno otherwise.
5987 */
ata_host_activate(struct ata_host * host,int irq,irq_handler_t irq_handler,unsigned long irq_flags,const struct scsi_host_template * sht)5988 int ata_host_activate(struct ata_host *host, int irq,
5989 irq_handler_t irq_handler, unsigned long irq_flags,
5990 const struct scsi_host_template *sht)
5991 {
5992 int i, rc;
5993 char *irq_desc;
5994
5995 rc = ata_host_start(host);
5996 if (rc)
5997 return rc;
5998
5999 /* Special case for polling mode */
6000 if (!irq) {
6001 WARN_ON(irq_handler);
6002 return ata_host_register(host, sht);
6003 }
6004
6005 irq_desc = devm_kasprintf(host->dev, GFP_KERNEL, "%s[%s]",
6006 dev_driver_string(host->dev),
6007 dev_name(host->dev));
6008 if (!irq_desc)
6009 return -ENOMEM;
6010
6011 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6012 irq_desc, host);
6013 if (rc)
6014 return rc;
6015
6016 for (i = 0; i < host->n_ports; i++)
6017 ata_port_desc_misc(host->ports[i], irq);
6018
6019 rc = ata_host_register(host, sht);
6020 /* if failed, just free the IRQ and leave ports alone */
6021 if (rc)
6022 devm_free_irq(host->dev, irq, host);
6023
6024 return rc;
6025 }
6026 EXPORT_SYMBOL_GPL(ata_host_activate);
6027
6028 /**
6029 * ata_port_detach - Detach ATA port in preparation of device removal
6030 * @ap: ATA port to be detached
6031 *
6032 * Detach all ATA devices and the associated SCSI devices of @ap;
6033 * then, remove the associated SCSI host. @ap is guaranteed to
6034 * be quiescent on return from this function.
6035 *
6036 * LOCKING:
6037 * Kernel thread context (may sleep).
6038 */
ata_port_detach(struct ata_port * ap)6039 static void ata_port_detach(struct ata_port *ap)
6040 {
6041 unsigned long flags;
6042 struct ata_link *link;
6043 struct ata_device *dev;
6044
6045 /* Ensure ata_port probe has completed */
6046 async_synchronize_cookie(ap->cookie + 1);
6047
6048 /* Wait for any ongoing EH */
6049 ata_port_wait_eh(ap);
6050
6051 mutex_lock(&ap->scsi_scan_mutex);
6052 spin_lock_irqsave(ap->lock, flags);
6053
6054 /* Remove scsi devices */
6055 ata_for_each_link(link, ap, HOST_FIRST) {
6056 ata_for_each_dev(dev, link, ALL) {
6057 if (dev->sdev) {
6058 spin_unlock_irqrestore(ap->lock, flags);
6059 scsi_remove_device(dev->sdev);
6060 spin_lock_irqsave(ap->lock, flags);
6061 dev->sdev = NULL;
6062 }
6063 }
6064 }
6065
6066 /* Tell EH to disable all devices */
6067 ap->pflags |= ATA_PFLAG_UNLOADING;
6068 ata_port_schedule_eh(ap);
6069
6070 spin_unlock_irqrestore(ap->lock, flags);
6071 mutex_unlock(&ap->scsi_scan_mutex);
6072
6073 /* wait till EH commits suicide */
6074 ata_port_wait_eh(ap);
6075
6076 /* it better be dead now */
6077 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6078
6079 cancel_delayed_work_sync(&ap->hotplug_task);
6080 cancel_delayed_work_sync(&ap->scsi_rescan_task);
6081
6082 /* clean up zpodd on port removal */
6083 ata_for_each_link(link, ap, HOST_FIRST) {
6084 ata_for_each_dev(dev, link, ALL) {
6085 if (zpodd_dev_enabled(dev))
6086 zpodd_exit(dev);
6087 }
6088 }
6089 if (ap->pmp_link) {
6090 int i;
6091 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
6092 ata_tlink_delete(&ap->pmp_link[i]);
6093 }
6094 /* remove the associated SCSI host */
6095 scsi_remove_host(ap->scsi_host);
6096 ata_tport_delete(ap);
6097 }
6098
6099 /**
6100 * ata_host_detach - Detach all ports of an ATA host
6101 * @host: Host to detach
6102 *
6103 * Detach all ports of @host.
6104 *
6105 * LOCKING:
6106 * Kernel thread context (may sleep).
6107 */
ata_host_detach(struct ata_host * host)6108 void ata_host_detach(struct ata_host *host)
6109 {
6110 int i;
6111
6112 for (i = 0; i < host->n_ports; i++)
6113 ata_port_detach(host->ports[i]);
6114
6115 /* the host is dead now, dissociate ACPI */
6116 ata_acpi_dissociate(host);
6117 }
6118 EXPORT_SYMBOL_GPL(ata_host_detach);
6119
6120 #ifdef CONFIG_PCI
6121
6122 /**
6123 * ata_pci_remove_one - PCI layer callback for device removal
6124 * @pdev: PCI device that was removed
6125 *
6126 * PCI layer indicates to libata via this hook that hot-unplug or
6127 * module unload event has occurred. Detach all ports. Resource
6128 * release is handled via devres.
6129 *
6130 * LOCKING:
6131 * Inherited from PCI layer (may sleep).
6132 */
ata_pci_remove_one(struct pci_dev * pdev)6133 void ata_pci_remove_one(struct pci_dev *pdev)
6134 {
6135 struct ata_host *host = pci_get_drvdata(pdev);
6136
6137 ata_host_detach(host);
6138 }
6139 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6140
ata_pci_shutdown_one(struct pci_dev * pdev)6141 void ata_pci_shutdown_one(struct pci_dev *pdev)
6142 {
6143 struct ata_host *host = pci_get_drvdata(pdev);
6144 int i;
6145
6146 for (i = 0; i < host->n_ports; i++) {
6147 struct ata_port *ap = host->ports[i];
6148
6149 ap->pflags |= ATA_PFLAG_FROZEN;
6150
6151 /* Disable port interrupts */
6152 if (ap->ops->freeze)
6153 ap->ops->freeze(ap);
6154
6155 /* Stop the port DMA engines */
6156 if (ap->ops->port_stop)
6157 ap->ops->port_stop(ap);
6158 }
6159 }
6160 EXPORT_SYMBOL_GPL(ata_pci_shutdown_one);
6161
6162 /* move to PCI subsystem */
pci_test_config_bits(struct pci_dev * pdev,const struct pci_bits * bits)6163 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6164 {
6165 unsigned long tmp = 0;
6166
6167 switch (bits->width) {
6168 case 1: {
6169 u8 tmp8 = 0;
6170 pci_read_config_byte(pdev, bits->reg, &tmp8);
6171 tmp = tmp8;
6172 break;
6173 }
6174 case 2: {
6175 u16 tmp16 = 0;
6176 pci_read_config_word(pdev, bits->reg, &tmp16);
6177 tmp = tmp16;
6178 break;
6179 }
6180 case 4: {
6181 u32 tmp32 = 0;
6182 pci_read_config_dword(pdev, bits->reg, &tmp32);
6183 tmp = tmp32;
6184 break;
6185 }
6186
6187 default:
6188 return -EINVAL;
6189 }
6190
6191 tmp &= bits->mask;
6192
6193 return (tmp == bits->val) ? 1 : 0;
6194 }
6195 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6196
6197 #ifdef CONFIG_PM
ata_pci_device_do_suspend(struct pci_dev * pdev,pm_message_t mesg)6198 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6199 {
6200 pci_save_state(pdev);
6201 pci_disable_device(pdev);
6202
6203 if (mesg.event & PM_EVENT_SLEEP)
6204 pci_set_power_state(pdev, PCI_D3hot);
6205 }
6206 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6207
ata_pci_device_do_resume(struct pci_dev * pdev)6208 int ata_pci_device_do_resume(struct pci_dev *pdev)
6209 {
6210 int rc;
6211
6212 pci_set_power_state(pdev, PCI_D0);
6213 pci_restore_state(pdev);
6214
6215 rc = pcim_enable_device(pdev);
6216 if (rc) {
6217 dev_err(&pdev->dev,
6218 "failed to enable device after resume (%d)\n", rc);
6219 return rc;
6220 }
6221
6222 pci_set_master(pdev);
6223 return 0;
6224 }
6225 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6226
ata_pci_device_suspend(struct pci_dev * pdev,pm_message_t mesg)6227 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6228 {
6229 struct ata_host *host = pci_get_drvdata(pdev);
6230
6231 ata_host_suspend(host, mesg);
6232
6233 ata_pci_device_do_suspend(pdev, mesg);
6234
6235 return 0;
6236 }
6237 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6238
ata_pci_device_resume(struct pci_dev * pdev)6239 int ata_pci_device_resume(struct pci_dev *pdev)
6240 {
6241 struct ata_host *host = pci_get_drvdata(pdev);
6242 int rc;
6243
6244 rc = ata_pci_device_do_resume(pdev);
6245 if (rc == 0)
6246 ata_host_resume(host);
6247 return rc;
6248 }
6249 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6250 #endif /* CONFIG_PM */
6251 #endif /* CONFIG_PCI */
6252
6253 /**
6254 * ata_platform_remove_one - Platform layer callback for device removal
6255 * @pdev: Platform device that was removed
6256 *
6257 * Platform layer indicates to libata via this hook that hot-unplug or
6258 * module unload event has occurred. Detach all ports. Resource
6259 * release is handled via devres.
6260 *
6261 * LOCKING:
6262 * Inherited from platform layer (may sleep).
6263 */
ata_platform_remove_one(struct platform_device * pdev)6264 void ata_platform_remove_one(struct platform_device *pdev)
6265 {
6266 struct ata_host *host = platform_get_drvdata(pdev);
6267
6268 ata_host_detach(host);
6269 }
6270 EXPORT_SYMBOL_GPL(ata_platform_remove_one);
6271
6272 #ifdef CONFIG_ATA_FORCE
6273
6274 #define force_cbl(name, flag) \
6275 { #name, .cbl = (flag) }
6276
6277 #define force_spd_limit(spd, val) \
6278 { #spd, .spd_limit = (val) }
6279
6280 #define force_xfer(mode, shift) \
6281 { #mode, .xfer_mask = (1UL << (shift)) }
6282
6283 #define force_lflag_on(name, flags) \
6284 { #name, .lflags_on = (flags) }
6285
6286 #define force_lflag_onoff(name, flags) \
6287 { "no" #name, .lflags_on = (flags) }, \
6288 { #name, .lflags_off = (flags) }
6289
6290 #define force_horkage_on(name, flag) \
6291 { #name, .horkage_on = (flag) }
6292
6293 #define force_horkage_onoff(name, flag) \
6294 { "no" #name, .horkage_on = (flag) }, \
6295 { #name, .horkage_off = (flag) }
6296
6297 static const struct ata_force_param force_tbl[] __initconst = {
6298 force_cbl(40c, ATA_CBL_PATA40),
6299 force_cbl(80c, ATA_CBL_PATA80),
6300 force_cbl(short40c, ATA_CBL_PATA40_SHORT),
6301 force_cbl(unk, ATA_CBL_PATA_UNK),
6302 force_cbl(ign, ATA_CBL_PATA_IGN),
6303 force_cbl(sata, ATA_CBL_SATA),
6304
6305 force_spd_limit(1.5Gbps, 1),
6306 force_spd_limit(3.0Gbps, 2),
6307
6308 force_xfer(pio0, ATA_SHIFT_PIO + 0),
6309 force_xfer(pio1, ATA_SHIFT_PIO + 1),
6310 force_xfer(pio2, ATA_SHIFT_PIO + 2),
6311 force_xfer(pio3, ATA_SHIFT_PIO + 3),
6312 force_xfer(pio4, ATA_SHIFT_PIO + 4),
6313 force_xfer(pio5, ATA_SHIFT_PIO + 5),
6314 force_xfer(pio6, ATA_SHIFT_PIO + 6),
6315 force_xfer(mwdma0, ATA_SHIFT_MWDMA + 0),
6316 force_xfer(mwdma1, ATA_SHIFT_MWDMA + 1),
6317 force_xfer(mwdma2, ATA_SHIFT_MWDMA + 2),
6318 force_xfer(mwdma3, ATA_SHIFT_MWDMA + 3),
6319 force_xfer(mwdma4, ATA_SHIFT_MWDMA + 4),
6320 force_xfer(udma0, ATA_SHIFT_UDMA + 0),
6321 force_xfer(udma16, ATA_SHIFT_UDMA + 0),
6322 force_xfer(udma/16, ATA_SHIFT_UDMA + 0),
6323 force_xfer(udma1, ATA_SHIFT_UDMA + 1),
6324 force_xfer(udma25, ATA_SHIFT_UDMA + 1),
6325 force_xfer(udma/25, ATA_SHIFT_UDMA + 1),
6326 force_xfer(udma2, ATA_SHIFT_UDMA + 2),
6327 force_xfer(udma33, ATA_SHIFT_UDMA + 2),
6328 force_xfer(udma/33, ATA_SHIFT_UDMA + 2),
6329 force_xfer(udma3, ATA_SHIFT_UDMA + 3),
6330 force_xfer(udma44, ATA_SHIFT_UDMA + 3),
6331 force_xfer(udma/44, ATA_SHIFT_UDMA + 3),
6332 force_xfer(udma4, ATA_SHIFT_UDMA + 4),
6333 force_xfer(udma66, ATA_SHIFT_UDMA + 4),
6334 force_xfer(udma/66, ATA_SHIFT_UDMA + 4),
6335 force_xfer(udma5, ATA_SHIFT_UDMA + 5),
6336 force_xfer(udma100, ATA_SHIFT_UDMA + 5),
6337 force_xfer(udma/100, ATA_SHIFT_UDMA + 5),
6338 force_xfer(udma6, ATA_SHIFT_UDMA + 6),
6339 force_xfer(udma133, ATA_SHIFT_UDMA + 6),
6340 force_xfer(udma/133, ATA_SHIFT_UDMA + 6),
6341 force_xfer(udma7, ATA_SHIFT_UDMA + 7),
6342
6343 force_lflag_on(nohrst, ATA_LFLAG_NO_HRST),
6344 force_lflag_on(nosrst, ATA_LFLAG_NO_SRST),
6345 force_lflag_on(norst, ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST),
6346 force_lflag_on(rstonce, ATA_LFLAG_RST_ONCE),
6347 force_lflag_onoff(dbdelay, ATA_LFLAG_NO_DEBOUNCE_DELAY),
6348
6349 force_horkage_onoff(ncq, ATA_HORKAGE_NONCQ),
6350 force_horkage_onoff(ncqtrim, ATA_HORKAGE_NO_NCQ_TRIM),
6351 force_horkage_onoff(ncqati, ATA_HORKAGE_NO_NCQ_ON_ATI),
6352
6353 force_horkage_onoff(trim, ATA_HORKAGE_NOTRIM),
6354 force_horkage_on(trim_zero, ATA_HORKAGE_ZERO_AFTER_TRIM),
6355 force_horkage_on(max_trim_128m, ATA_HORKAGE_MAX_TRIM_128M),
6356
6357 force_horkage_onoff(dma, ATA_HORKAGE_NODMA),
6358 force_horkage_on(atapi_dmadir, ATA_HORKAGE_ATAPI_DMADIR),
6359 force_horkage_on(atapi_mod16_dma, ATA_HORKAGE_ATAPI_MOD16_DMA),
6360
6361 force_horkage_onoff(dmalog, ATA_HORKAGE_NO_DMA_LOG),
6362 force_horkage_onoff(iddevlog, ATA_HORKAGE_NO_ID_DEV_LOG),
6363 force_horkage_onoff(logdir, ATA_HORKAGE_NO_LOG_DIR),
6364
6365 force_horkage_on(max_sec_128, ATA_HORKAGE_MAX_SEC_128),
6366 force_horkage_on(max_sec_1024, ATA_HORKAGE_MAX_SEC_1024),
6367 force_horkage_on(max_sec_lba48, ATA_HORKAGE_MAX_SEC_LBA48),
6368
6369 force_horkage_onoff(lpm, ATA_HORKAGE_NOLPM),
6370 force_horkage_onoff(setxfer, ATA_HORKAGE_NOSETXFER),
6371 force_horkage_on(dump_id, ATA_HORKAGE_DUMP_ID),
6372 force_horkage_onoff(fua, ATA_HORKAGE_NO_FUA),
6373
6374 force_horkage_on(disable, ATA_HORKAGE_DISABLE),
6375 };
6376
ata_parse_force_one(char ** cur,struct ata_force_ent * force_ent,const char ** reason)6377 static int __init ata_parse_force_one(char **cur,
6378 struct ata_force_ent *force_ent,
6379 const char **reason)
6380 {
6381 char *start = *cur, *p = *cur;
6382 char *id, *val, *endp;
6383 const struct ata_force_param *match_fp = NULL;
6384 int nr_matches = 0, i;
6385
6386 /* find where this param ends and update *cur */
6387 while (*p != '\0' && *p != ',')
6388 p++;
6389
6390 if (*p == '\0')
6391 *cur = p;
6392 else
6393 *cur = p + 1;
6394
6395 *p = '\0';
6396
6397 /* parse */
6398 p = strchr(start, ':');
6399 if (!p) {
6400 val = strstrip(start);
6401 goto parse_val;
6402 }
6403 *p = '\0';
6404
6405 id = strstrip(start);
6406 val = strstrip(p + 1);
6407
6408 /* parse id */
6409 p = strchr(id, '.');
6410 if (p) {
6411 *p++ = '\0';
6412 force_ent->device = simple_strtoul(p, &endp, 10);
6413 if (p == endp || *endp != '\0') {
6414 *reason = "invalid device";
6415 return -EINVAL;
6416 }
6417 }
6418
6419 force_ent->port = simple_strtoul(id, &endp, 10);
6420 if (id == endp || *endp != '\0') {
6421 *reason = "invalid port/link";
6422 return -EINVAL;
6423 }
6424
6425 parse_val:
6426 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6427 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6428 const struct ata_force_param *fp = &force_tbl[i];
6429
6430 if (strncasecmp(val, fp->name, strlen(val)))
6431 continue;
6432
6433 nr_matches++;
6434 match_fp = fp;
6435
6436 if (strcasecmp(val, fp->name) == 0) {
6437 nr_matches = 1;
6438 break;
6439 }
6440 }
6441
6442 if (!nr_matches) {
6443 *reason = "unknown value";
6444 return -EINVAL;
6445 }
6446 if (nr_matches > 1) {
6447 *reason = "ambiguous value";
6448 return -EINVAL;
6449 }
6450
6451 force_ent->param = *match_fp;
6452
6453 return 0;
6454 }
6455
ata_parse_force_param(void)6456 static void __init ata_parse_force_param(void)
6457 {
6458 int idx = 0, size = 1;
6459 int last_port = -1, last_device = -1;
6460 char *p, *cur, *next;
6461
6462 /* Calculate maximum number of params and allocate ata_force_tbl */
6463 for (p = ata_force_param_buf; *p; p++)
6464 if (*p == ',')
6465 size++;
6466
6467 ata_force_tbl = kcalloc(size, sizeof(ata_force_tbl[0]), GFP_KERNEL);
6468 if (!ata_force_tbl) {
6469 printk(KERN_WARNING "ata: failed to extend force table, "
6470 "libata.force ignored\n");
6471 return;
6472 }
6473
6474 /* parse and populate the table */
6475 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6476 const char *reason = "";
6477 struct ata_force_ent te = { .port = -1, .device = -1 };
6478
6479 next = cur;
6480 if (ata_parse_force_one(&next, &te, &reason)) {
6481 printk(KERN_WARNING "ata: failed to parse force "
6482 "parameter \"%s\" (%s)\n",
6483 cur, reason);
6484 continue;
6485 }
6486
6487 if (te.port == -1) {
6488 te.port = last_port;
6489 te.device = last_device;
6490 }
6491
6492 ata_force_tbl[idx++] = te;
6493
6494 last_port = te.port;
6495 last_device = te.device;
6496 }
6497
6498 ata_force_tbl_size = idx;
6499 }
6500
ata_free_force_param(void)6501 static void ata_free_force_param(void)
6502 {
6503 kfree(ata_force_tbl);
6504 }
6505 #else
ata_parse_force_param(void)6506 static inline void ata_parse_force_param(void) { }
ata_free_force_param(void)6507 static inline void ata_free_force_param(void) { }
6508 #endif
6509
ata_init(void)6510 static int __init ata_init(void)
6511 {
6512 int rc;
6513
6514 ata_parse_force_param();
6515
6516 rc = ata_sff_init();
6517 if (rc) {
6518 ata_free_force_param();
6519 return rc;
6520 }
6521
6522 libata_transport_init();
6523 ata_scsi_transport_template = ata_attach_transport();
6524 if (!ata_scsi_transport_template) {
6525 ata_sff_exit();
6526 rc = -ENOMEM;
6527 goto err_out;
6528 }
6529
6530 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6531 return 0;
6532
6533 err_out:
6534 return rc;
6535 }
6536
ata_exit(void)6537 static void __exit ata_exit(void)
6538 {
6539 ata_release_transport(ata_scsi_transport_template);
6540 libata_transport_exit();
6541 ata_sff_exit();
6542 ata_free_force_param();
6543 }
6544
6545 subsys_initcall(ata_init);
6546 module_exit(ata_exit);
6547
6548 static DEFINE_RATELIMIT_STATE(ratelimit, HZ / 5, 1);
6549
ata_ratelimit(void)6550 int ata_ratelimit(void)
6551 {
6552 return __ratelimit(&ratelimit);
6553 }
6554 EXPORT_SYMBOL_GPL(ata_ratelimit);
6555
6556 /**
6557 * ata_msleep - ATA EH owner aware msleep
6558 * @ap: ATA port to attribute the sleep to
6559 * @msecs: duration to sleep in milliseconds
6560 *
6561 * Sleeps @msecs. If the current task is owner of @ap's EH, the
6562 * ownership is released before going to sleep and reacquired
6563 * after the sleep is complete. IOW, other ports sharing the
6564 * @ap->host will be allowed to own the EH while this task is
6565 * sleeping.
6566 *
6567 * LOCKING:
6568 * Might sleep.
6569 */
ata_msleep(struct ata_port * ap,unsigned int msecs)6570 void ata_msleep(struct ata_port *ap, unsigned int msecs)
6571 {
6572 bool owns_eh = ap && ap->host->eh_owner == current;
6573
6574 if (owns_eh)
6575 ata_eh_release(ap);
6576
6577 if (msecs < 20) {
6578 unsigned long usecs = msecs * USEC_PER_MSEC;
6579 usleep_range(usecs, usecs + 50);
6580 } else {
6581 msleep(msecs);
6582 }
6583
6584 if (owns_eh)
6585 ata_eh_acquire(ap);
6586 }
6587 EXPORT_SYMBOL_GPL(ata_msleep);
6588
6589 /**
6590 * ata_wait_register - wait until register value changes
6591 * @ap: ATA port to wait register for, can be NULL
6592 * @reg: IO-mapped register
6593 * @mask: Mask to apply to read register value
6594 * @val: Wait condition
6595 * @interval: polling interval in milliseconds
6596 * @timeout: timeout in milliseconds
6597 *
6598 * Waiting for some bits of register to change is a common
6599 * operation for ATA controllers. This function reads 32bit LE
6600 * IO-mapped register @reg and tests for the following condition.
6601 *
6602 * (*@reg & mask) != val
6603 *
6604 * If the condition is met, it returns; otherwise, the process is
6605 * repeated after @interval_msec until timeout.
6606 *
6607 * LOCKING:
6608 * Kernel thread context (may sleep)
6609 *
6610 * RETURNS:
6611 * The final register value.
6612 */
ata_wait_register(struct ata_port * ap,void __iomem * reg,u32 mask,u32 val,unsigned int interval,unsigned int timeout)6613 u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
6614 unsigned int interval, unsigned int timeout)
6615 {
6616 unsigned long deadline;
6617 u32 tmp;
6618
6619 tmp = ioread32(reg);
6620
6621 /* Calculate timeout _after_ the first read to make sure
6622 * preceding writes reach the controller before starting to
6623 * eat away the timeout.
6624 */
6625 deadline = ata_deadline(jiffies, timeout);
6626
6627 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6628 ata_msleep(ap, interval);
6629 tmp = ioread32(reg);
6630 }
6631
6632 return tmp;
6633 }
6634 EXPORT_SYMBOL_GPL(ata_wait_register);
6635
6636 /*
6637 * Dummy port_ops
6638 */
ata_dummy_qc_issue(struct ata_queued_cmd * qc)6639 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6640 {
6641 return AC_ERR_SYSTEM;
6642 }
6643
ata_dummy_error_handler(struct ata_port * ap)6644 static void ata_dummy_error_handler(struct ata_port *ap)
6645 {
6646 /* truly dummy */
6647 }
6648
6649 struct ata_port_operations ata_dummy_port_ops = {
6650 .qc_prep = ata_noop_qc_prep,
6651 .qc_issue = ata_dummy_qc_issue,
6652 .error_handler = ata_dummy_error_handler,
6653 .sched_eh = ata_std_sched_eh,
6654 .end_eh = ata_std_end_eh,
6655 };
6656 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6657
6658 const struct ata_port_info ata_dummy_port_info = {
6659 .port_ops = &ata_dummy_port_ops,
6660 };
6661 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6662
ata_print_version(const struct device * dev,const char * version)6663 void ata_print_version(const struct device *dev, const char *version)
6664 {
6665 dev_printk(KERN_DEBUG, dev, "version %s\n", version);
6666 }
6667 EXPORT_SYMBOL(ata_print_version);
6668
6669 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_tf_load);
6670 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_exec_command);
6671 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_setup);
6672 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_start);
6673 EXPORT_TRACEPOINT_SYMBOL_GPL(ata_bmdma_status);
6674