Commit | Line | Data |
---|---|---|
3af9a77a TH |
1 | /* |
2 | * libata-pmp.c - libata port multiplier support | |
3 | * | |
4 | * Copyright (c) 2007 SUSE Linux Products GmbH | |
5 | * Copyright (c) 2007 Tejun Heo <teheo@suse.de> | |
6 | * | |
7 | * This file is released under the GPLv2. | |
8 | */ | |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/libata.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
3af9a77a | 13 | #include "libata.h" |
d9027470 | 14 | #include "libata-transport.h" |
3af9a77a | 15 | |
48515f6c TH |
16 | const struct ata_port_operations sata_pmp_port_ops = { |
17 | .inherits = &sata_port_ops, | |
18 | .pmp_prereset = ata_std_prereset, | |
19 | .pmp_hardreset = sata_std_hardreset, | |
20 | .pmp_postreset = ata_std_postreset, | |
21 | .error_handler = sata_pmp_error_handler, | |
22 | }; | |
23 | ||
3af9a77a TH |
24 | /** |
25 | * sata_pmp_read - read PMP register | |
26 | * @link: link to read PMP register for | |
27 | * @reg: register to read | |
28 | * @r_val: resulting value | |
29 | * | |
b06ce3e5 | 30 | * Read PMP register. |
3af9a77a TH |
31 | * |
32 | * LOCKING: | |
33 | * Kernel thread context (may sleep). | |
34 | * | |
35 | * RETURNS: | |
b06ce3e5 | 36 | * 0 on success, AC_ERR_* mask on failure. |
3af9a77a | 37 | */ |
b06ce3e5 | 38 | static unsigned int sata_pmp_read(struct ata_link *link, int reg, u32 *r_val) |
3af9a77a TH |
39 | { |
40 | struct ata_port *ap = link->ap; | |
41 | struct ata_device *pmp_dev = ap->link.device; | |
b06ce3e5 TH |
42 | struct ata_taskfile tf; |
43 | unsigned int err_mask; | |
44 | ||
45 | ata_tf_init(pmp_dev, &tf); | |
46 | tf.command = ATA_CMD_PMP_READ; | |
47 | tf.protocol = ATA_PROT_NODATA; | |
39f25e70 | 48 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; |
b06ce3e5 TH |
49 | tf.feature = reg; |
50 | tf.device = link->pmp; | |
51 | ||
52 | err_mask = ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0, | |
bf1bff6f | 53 | SATA_PMP_RW_TIMEOUT); |
b06ce3e5 TH |
54 | if (err_mask) |
55 | return err_mask; | |
56 | ||
57 | *r_val = tf.nsect | tf.lbal << 8 | tf.lbam << 16 | tf.lbah << 24; | |
58 | return 0; | |
3af9a77a TH |
59 | } |
60 | ||
61 | /** | |
62 | * sata_pmp_write - write PMP register | |
63 | * @link: link to write PMP register for | |
64 | * @reg: register to write | |
65 | * @r_val: value to write | |
66 | * | |
b06ce3e5 | 67 | * Write PMP register. |
3af9a77a TH |
68 | * |
69 | * LOCKING: | |
70 | * Kernel thread context (may sleep). | |
71 | * | |
72 | * RETURNS: | |
b06ce3e5 | 73 | * 0 on success, AC_ERR_* mask on failure. |
3af9a77a | 74 | */ |
b06ce3e5 | 75 | static unsigned int sata_pmp_write(struct ata_link *link, int reg, u32 val) |
3af9a77a TH |
76 | { |
77 | struct ata_port *ap = link->ap; | |
78 | struct ata_device *pmp_dev = ap->link.device; | |
b06ce3e5 TH |
79 | struct ata_taskfile tf; |
80 | ||
81 | ata_tf_init(pmp_dev, &tf); | |
82 | tf.command = ATA_CMD_PMP_WRITE; | |
83 | tf.protocol = ATA_PROT_NODATA; | |
39f25e70 | 84 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; |
b06ce3e5 TH |
85 | tf.feature = reg; |
86 | tf.device = link->pmp; | |
87 | tf.nsect = val & 0xff; | |
88 | tf.lbal = (val >> 8) & 0xff; | |
89 | tf.lbam = (val >> 16) & 0xff; | |
90 | tf.lbah = (val >> 24) & 0xff; | |
91 | ||
92 | return ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0, | |
bf1bff6f | 93 | SATA_PMP_RW_TIMEOUT); |
3af9a77a TH |
94 | } |
95 | ||
31f88384 TH |
96 | /** |
97 | * sata_pmp_qc_defer_cmd_switch - qc_defer for command switching PMP | |
98 | * @qc: ATA command in question | |
99 | * | |
100 | * A host which has command switching PMP support cannot issue | |
101 | * commands to multiple links simultaneously. | |
102 | * | |
103 | * LOCKING: | |
104 | * spin_lock_irqsave(host lock) | |
105 | * | |
106 | * RETURNS: | |
107 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
108 | */ | |
109 | int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc) | |
110 | { | |
111 | struct ata_link *link = qc->dev->link; | |
112 | struct ata_port *ap = link->ap; | |
113 | ||
114 | if (ap->excl_link == NULL || ap->excl_link == link) { | |
115 | if (ap->nr_active_links == 0 || ata_link_active(link)) { | |
116 | qc->flags |= ATA_QCFLAG_CLEAR_EXCL; | |
117 | return ata_std_qc_defer(qc); | |
118 | } | |
119 | ||
120 | ap->excl_link = link; | |
121 | } | |
122 | ||
123 | return ATA_DEFER_PORT; | |
124 | } | |
125 | ||
3af9a77a TH |
126 | /** |
127 | * sata_pmp_scr_read - read PSCR | |
128 | * @link: ATA link to read PSCR for | |
129 | * @reg: PSCR to read | |
130 | * @r_val: resulting value | |
131 | * | |
132 | * Read PSCR @reg into @r_val for @link, to be called from | |
133 | * ata_scr_read(). | |
134 | * | |
135 | * LOCKING: | |
136 | * Kernel thread context (may sleep). | |
137 | * | |
138 | * RETURNS: | |
139 | * 0 on success, -errno on failure. | |
140 | */ | |
141 | int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *r_val) | |
142 | { | |
b06ce3e5 TH |
143 | unsigned int err_mask; |
144 | ||
3af9a77a TH |
145 | if (reg > SATA_PMP_PSCR_CONTROL) |
146 | return -EINVAL; | |
147 | ||
b06ce3e5 TH |
148 | err_mask = sata_pmp_read(link, reg, r_val); |
149 | if (err_mask) { | |
a9a79dfe JP |
150 | ata_link_warn(link, "failed to read SCR %d (Emask=0x%x)\n", |
151 | reg, err_mask); | |
b06ce3e5 TH |
152 | return -EIO; |
153 | } | |
154 | return 0; | |
3af9a77a TH |
155 | } |
156 | ||
157 | /** | |
158 | * sata_pmp_scr_write - write PSCR | |
159 | * @link: ATA link to write PSCR for | |
160 | * @reg: PSCR to write | |
161 | * @val: value to be written | |
162 | * | |
163 | * Write @val to PSCR @reg for @link, to be called from | |
164 | * ata_scr_write() and ata_scr_write_flush(). | |
165 | * | |
166 | * LOCKING: | |
167 | * Kernel thread context (may sleep). | |
168 | * | |
169 | * RETURNS: | |
170 | * 0 on success, -errno on failure. | |
171 | */ | |
172 | int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val) | |
173 | { | |
b06ce3e5 TH |
174 | unsigned int err_mask; |
175 | ||
3af9a77a TH |
176 | if (reg > SATA_PMP_PSCR_CONTROL) |
177 | return -EINVAL; | |
178 | ||
b06ce3e5 TH |
179 | err_mask = sata_pmp_write(link, reg, val); |
180 | if (err_mask) { | |
a9a79dfe JP |
181 | ata_link_warn(link, "failed to write SCR %d (Emask=0x%x)\n", |
182 | reg, err_mask); | |
b06ce3e5 TH |
183 | return -EIO; |
184 | } | |
185 | return 0; | |
3af9a77a TH |
186 | } |
187 | ||
6c8ea89c TH |
188 | /** |
189 | * sata_pmp_set_lpm - configure LPM for a PMP link | |
190 | * @link: PMP link to configure LPM for | |
191 | * @policy: target LPM policy | |
192 | * @hints: LPM hints | |
193 | * | |
194 | * Configure LPM for @link. This function will contain any PMP | |
195 | * specific workarounds if necessary. | |
196 | * | |
197 | * LOCKING: | |
198 | * EH context. | |
199 | * | |
200 | * RETURNS: | |
201 | * 0 on success, -errno on failure. | |
202 | */ | |
203 | int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
204 | unsigned hints) | |
205 | { | |
206 | return sata_link_scr_lpm(link, policy, true); | |
207 | } | |
208 | ||
3af9a77a TH |
209 | /** |
210 | * sata_pmp_read_gscr - read GSCR block of SATA PMP | |
211 | * @dev: PMP device | |
212 | * @gscr: buffer to read GSCR block into | |
213 | * | |
214 | * Read selected PMP GSCRs from the PMP at @dev. This will serve | |
215 | * as configuration and identification info for the PMP. | |
216 | * | |
217 | * LOCKING: | |
218 | * Kernel thread context (may sleep). | |
219 | * | |
220 | * RETURNS: | |
221 | * 0 on success, -errno on failure. | |
222 | */ | |
223 | static int sata_pmp_read_gscr(struct ata_device *dev, u32 *gscr) | |
224 | { | |
225 | static const int gscr_to_read[] = { 0, 1, 2, 32, 33, 64, 96 }; | |
b06ce3e5 | 226 | int i; |
3af9a77a TH |
227 | |
228 | for (i = 0; i < ARRAY_SIZE(gscr_to_read); i++) { | |
229 | int reg = gscr_to_read[i]; | |
b06ce3e5 | 230 | unsigned int err_mask; |
3af9a77a | 231 | |
b06ce3e5 TH |
232 | err_mask = sata_pmp_read(dev->link, reg, &gscr[reg]); |
233 | if (err_mask) { | |
a9a79dfe JP |
234 | ata_dev_err(dev, "failed to read PMP GSCR[%d] (Emask=0x%x)\n", |
235 | reg, err_mask); | |
b06ce3e5 | 236 | return -EIO; |
3af9a77a TH |
237 | } |
238 | } | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | static const char *sata_pmp_spec_rev_str(const u32 *gscr) | |
244 | { | |
245 | u32 rev = gscr[SATA_PMP_GSCR_REV]; | |
246 | ||
deeb003e SH |
247 | if (rev & (1 << 3)) |
248 | return "1.2"; | |
3af9a77a TH |
249 | if (rev & (1 << 2)) |
250 | return "1.1"; | |
251 | if (rev & (1 << 1)) | |
252 | return "1.0"; | |
253 | return "<unknown>"; | |
254 | } | |
255 | ||
4f2c7748 GG |
256 | #define PMP_GSCR_SII_POL 129 |
257 | ||
3af9a77a TH |
258 | static int sata_pmp_configure(struct ata_device *dev, int print_info) |
259 | { | |
260 | struct ata_port *ap = dev->link->ap; | |
261 | u32 *gscr = dev->gscr; | |
4f2c7748 GG |
262 | u16 vendor = sata_pmp_gscr_vendor(gscr); |
263 | u16 devid = sata_pmp_gscr_devid(gscr); | |
b06ce3e5 | 264 | unsigned int err_mask = 0; |
3af9a77a TH |
265 | const char *reason; |
266 | int nr_ports, rc; | |
267 | ||
268 | nr_ports = sata_pmp_gscr_ports(gscr); | |
269 | ||
270 | if (nr_ports <= 0 || nr_ports > SATA_PMP_MAX_PORTS) { | |
271 | rc = -EINVAL; | |
272 | reason = "invalid nr_ports"; | |
273 | goto fail; | |
274 | } | |
275 | ||
276 | if ((ap->flags & ATA_FLAG_AN) && | |
277 | (gscr[SATA_PMP_GSCR_FEAT] & SATA_PMP_FEAT_NOTIFY)) | |
278 | dev->flags |= ATA_DFLAG_AN; | |
279 | ||
280 | /* monitor SERR_PHYRDY_CHG on fan-out ports */ | |
b06ce3e5 TH |
281 | err_mask = sata_pmp_write(dev->link, SATA_PMP_GSCR_ERROR_EN, |
282 | SERR_PHYRDY_CHG); | |
283 | if (err_mask) { | |
284 | rc = -EIO; | |
3af9a77a TH |
285 | reason = "failed to write GSCR_ERROR_EN"; |
286 | goto fail; | |
287 | } | |
288 | ||
4f2c7748 GG |
289 | /* Disable sending Early R_OK. |
290 | * With "cached read" HDD testing and multiple ports busy on a SATA | |
291 | * host controller, 3726 PMP will very rarely drop a deferred | |
292 | * R_OK that was intended for the host. Symptom will be all | |
293 | * 5 drives under test will timeout, get reset, and recover. | |
294 | */ | |
295 | if (vendor == 0x1095 && devid == 0x3726) { | |
296 | u32 reg; | |
297 | ||
298 | err_mask = sata_pmp_read(&ap->link, PMP_GSCR_SII_POL, ®); | |
299 | if (err_mask) { | |
300 | rc = -EIO; | |
301 | reason = "failed to read Sil3726 Private Register"; | |
302 | goto fail; | |
303 | } | |
304 | reg &= ~0x1; | |
305 | err_mask = sata_pmp_write(&ap->link, PMP_GSCR_SII_POL, reg); | |
306 | if (err_mask) { | |
307 | rc = -EIO; | |
308 | reason = "failed to write Sil3726 Private Register"; | |
309 | goto fail; | |
310 | } | |
311 | } | |
312 | ||
3af9a77a | 313 | if (print_info) { |
a9a79dfe JP |
314 | ata_dev_info(dev, "Port Multiplier %s, " |
315 | "0x%04x:0x%04x r%d, %d ports, feat 0x%x/0x%x\n", | |
316 | sata_pmp_spec_rev_str(gscr), vendor, devid, | |
317 | sata_pmp_gscr_rev(gscr), | |
318 | nr_ports, gscr[SATA_PMP_GSCR_FEAT_EN], | |
319 | gscr[SATA_PMP_GSCR_FEAT]); | |
3af9a77a TH |
320 | |
321 | if (!(dev->flags & ATA_DFLAG_AN)) | |
a9a79dfe | 322 | ata_dev_info(dev, |
3af9a77a | 323 | "Asynchronous notification not supported, " |
a9a79dfe | 324 | "hotplug won't work on fan-out ports. Use warm-plug instead.\n"); |
3af9a77a TH |
325 | } |
326 | ||
327 | return 0; | |
328 | ||
329 | fail: | |
a9a79dfe JP |
330 | ata_dev_err(dev, |
331 | "failed to configure Port Multiplier (%s, Emask=0x%x)\n", | |
332 | reason, err_mask); | |
3af9a77a TH |
333 | return rc; |
334 | } | |
335 | ||
d9027470 | 336 | static int sata_pmp_init_links (struct ata_port *ap, int nr_ports) |
3af9a77a TH |
337 | { |
338 | struct ata_link *pmp_link = ap->pmp_link; | |
d9027470 | 339 | int i, err; |
3af9a77a TH |
340 | |
341 | if (!pmp_link) { | |
342 | pmp_link = kzalloc(sizeof(pmp_link[0]) * SATA_PMP_MAX_PORTS, | |
343 | GFP_NOIO); | |
344 | if (!pmp_link) | |
345 | return -ENOMEM; | |
346 | ||
347 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
348 | ata_link_init(ap, &pmp_link[i], i); | |
349 | ||
350 | ap->pmp_link = pmp_link; | |
d9027470 GG |
351 | |
352 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) { | |
353 | err = ata_tlink_add(&pmp_link[i]); | |
354 | if (err) { | |
355 | goto err_tlink; | |
356 | } | |
357 | } | |
3af9a77a TH |
358 | } |
359 | ||
360 | for (i = 0; i < nr_ports; i++) { | |
361 | struct ata_link *link = &pmp_link[i]; | |
362 | struct ata_eh_context *ehc = &link->eh_context; | |
363 | ||
364 | link->flags = 0; | |
b558eddd | 365 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 366 | ehc->i.action |= ATA_EH_RESET; |
3af9a77a TH |
367 | } |
368 | ||
369 | return 0; | |
d9027470 GG |
370 | err_tlink: |
371 | while (--i >= 0) | |
372 | ata_tlink_delete(&pmp_link[i]); | |
373 | kfree(pmp_link); | |
374 | ap->pmp_link = NULL; | |
375 | return err; | |
3af9a77a TH |
376 | } |
377 | ||
378 | static void sata_pmp_quirks(struct ata_port *ap) | |
379 | { | |
380 | u32 *gscr = ap->link.device->gscr; | |
381 | u16 vendor = sata_pmp_gscr_vendor(gscr); | |
382 | u16 devid = sata_pmp_gscr_devid(gscr); | |
383 | struct ata_link *link; | |
384 | ||
385 | if (vendor == 0x1095 && devid == 0x3726) { | |
386 | /* sil3726 quirks */ | |
1eca4365 | 387 | ata_for_each_link(link, ap, EDGE) { |
6c8ea89c TH |
388 | /* link reports offline after LPM */ |
389 | link->flags |= ATA_LFLAG_NO_LPM; | |
390 | ||
19ef9d5e TH |
391 | /* Class code report is unreliable and SRST |
392 | * times out under certain configurations. | |
393 | */ | |
3af9a77a | 394 | if (link->pmp < 5) |
19ef9d5e TH |
395 | link->flags |= ATA_LFLAG_NO_SRST | |
396 | ATA_LFLAG_ASSUME_ATA; | |
3af9a77a TH |
397 | |
398 | /* port 5 is for SEMB device and it doesn't like SRST */ | |
399 | if (link->pmp == 5) | |
400 | link->flags |= ATA_LFLAG_NO_SRST | | |
401 | ATA_LFLAG_ASSUME_SEMB; | |
402 | } | |
403 | } else if (vendor == 0x1095 && devid == 0x4723) { | |
404 | /* sil4723 quirks */ | |
1eca4365 | 405 | ata_for_each_link(link, ap, EDGE) { |
6c8ea89c TH |
406 | /* link reports offline after LPM */ |
407 | link->flags |= ATA_LFLAG_NO_LPM; | |
408 | ||
3af9a77a TH |
409 | /* class code report is unreliable */ |
410 | if (link->pmp < 2) | |
411 | link->flags |= ATA_LFLAG_ASSUME_ATA; | |
412 | ||
413 | /* the config device at port 2 locks up on SRST */ | |
414 | if (link->pmp == 2) | |
415 | link->flags |= ATA_LFLAG_NO_SRST | | |
416 | ATA_LFLAG_ASSUME_ATA; | |
417 | } | |
418 | } else if (vendor == 0x1095 && devid == 0x4726) { | |
419 | /* sil4726 quirks */ | |
1eca4365 | 420 | ata_for_each_link(link, ap, EDGE) { |
6c8ea89c TH |
421 | /* link reports offline after LPM */ |
422 | link->flags |= ATA_LFLAG_NO_LPM; | |
423 | ||
8048307d TH |
424 | /* Class code report is unreliable and SRST |
425 | * times out under certain configurations. | |
426 | * Config device can be at port 0 or 5 and | |
427 | * locks up on SRST. | |
3af9a77a | 428 | */ |
8048307d | 429 | if (link->pmp <= 5) |
3af9a77a TH |
430 | link->flags |= ATA_LFLAG_NO_SRST | |
431 | ATA_LFLAG_ASSUME_ATA; | |
432 | ||
433 | /* Port 6 is for SEMB device which doesn't | |
434 | * like SRST either. | |
435 | */ | |
436 | if (link->pmp == 6) | |
437 | link->flags |= ATA_LFLAG_NO_SRST | | |
438 | ATA_LFLAG_ASSUME_SEMB; | |
439 | } | |
440 | } else if (vendor == 0x1095 && (devid == 0x5723 || devid == 0x5733 || | |
441 | devid == 0x5734 || devid == 0x5744)) { | |
442 | /* sil5723/5744 quirks */ | |
443 | ||
444 | /* sil5723/5744 has either two or three downstream | |
445 | * ports depending on operation mode. The last port | |
446 | * is empty if any actual IO device is available or | |
447 | * occupied by a pseudo configuration device | |
448 | * otherwise. Don't try hard to recover it. | |
449 | */ | |
450 | ap->pmp_link[ap->nr_pmp_links - 1].flags |= ATA_LFLAG_NO_RETRY; | |
0afc6f5b PH |
451 | } else if (vendor == 0x197b && devid == 0x2352) { |
452 | /* chip found in Thermaltake BlackX Duet, jmicron JMB350? */ | |
453 | ata_for_each_link(link, ap, EDGE) { | |
454 | /* SRST breaks detection and disks get misclassified | |
455 | * LPM disabled to avoid potential problems | |
456 | */ | |
457 | link->flags |= ATA_LFLAG_NO_LPM | | |
458 | ATA_LFLAG_NO_SRST | | |
459 | ATA_LFLAG_ASSUME_ATA; | |
460 | } | |
3af9a77a TH |
461 | } |
462 | } | |
463 | ||
464 | /** | |
465 | * sata_pmp_attach - attach a SATA PMP device | |
466 | * @dev: SATA PMP device to attach | |
467 | * | |
468 | * Configure and attach SATA PMP device @dev. This function is | |
469 | * also responsible for allocating and initializing PMP links. | |
470 | * | |
471 | * LOCKING: | |
472 | * Kernel thread context (may sleep). | |
473 | * | |
474 | * RETURNS: | |
475 | * 0 on success, -errno on failure. | |
476 | */ | |
477 | int sata_pmp_attach(struct ata_device *dev) | |
478 | { | |
479 | struct ata_link *link = dev->link; | |
480 | struct ata_port *ap = link->ap; | |
481 | unsigned long flags; | |
482 | struct ata_link *tlink; | |
483 | int rc; | |
484 | ||
485 | /* is it hanging off the right place? */ | |
071f44b1 | 486 | if (!sata_pmp_supported(ap)) { |
a9a79dfe | 487 | ata_dev_err(dev, "host does not support Port Multiplier\n"); |
3af9a77a TH |
488 | return -EINVAL; |
489 | } | |
490 | ||
491 | if (!ata_is_host_link(link)) { | |
a9a79dfe | 492 | ata_dev_err(dev, "Port Multipliers cannot be nested\n"); |
3af9a77a TH |
493 | return -EINVAL; |
494 | } | |
495 | ||
496 | if (dev->devno) { | |
a9a79dfe | 497 | ata_dev_err(dev, "Port Multiplier must be the first device\n"); |
3af9a77a TH |
498 | return -EINVAL; |
499 | } | |
500 | ||
501 | WARN_ON(link->pmp != 0); | |
502 | link->pmp = SATA_PMP_CTRL_PORT; | |
503 | ||
504 | /* read GSCR block */ | |
505 | rc = sata_pmp_read_gscr(dev, dev->gscr); | |
506 | if (rc) | |
507 | goto fail; | |
508 | ||
509 | /* config PMP */ | |
510 | rc = sata_pmp_configure(dev, 1); | |
511 | if (rc) | |
512 | goto fail; | |
513 | ||
514 | rc = sata_pmp_init_links(ap, sata_pmp_gscr_ports(dev->gscr)); | |
515 | if (rc) { | |
a9a79dfe | 516 | ata_dev_info(dev, "failed to initialize PMP links\n"); |
3af9a77a TH |
517 | goto fail; |
518 | } | |
519 | ||
520 | /* attach it */ | |
521 | spin_lock_irqsave(ap->lock, flags); | |
522 | WARN_ON(ap->nr_pmp_links); | |
523 | ap->nr_pmp_links = sata_pmp_gscr_ports(dev->gscr); | |
524 | spin_unlock_irqrestore(ap->lock, flags); | |
525 | ||
526 | sata_pmp_quirks(ap); | |
527 | ||
528 | if (ap->ops->pmp_attach) | |
529 | ap->ops->pmp_attach(ap); | |
530 | ||
1eca4365 | 531 | ata_for_each_link(tlink, ap, EDGE) |
3af9a77a TH |
532 | sata_link_init_spd(tlink); |
533 | ||
d0df8b5d TH |
534 | ata_acpi_associate_sata_port(ap); |
535 | ||
3af9a77a TH |
536 | return 0; |
537 | ||
538 | fail: | |
539 | link->pmp = 0; | |
540 | return rc; | |
541 | } | |
542 | ||
543 | /** | |
544 | * sata_pmp_detach - detach a SATA PMP device | |
545 | * @dev: SATA PMP device to detach | |
546 | * | |
547 | * Detach SATA PMP device @dev. This function is also | |
548 | * responsible for deconfiguring PMP links. | |
549 | * | |
550 | * LOCKING: | |
551 | * Kernel thread context (may sleep). | |
552 | */ | |
553 | static void sata_pmp_detach(struct ata_device *dev) | |
554 | { | |
555 | struct ata_link *link = dev->link; | |
556 | struct ata_port *ap = link->ap; | |
557 | struct ata_link *tlink; | |
558 | unsigned long flags; | |
559 | ||
a9a79dfe | 560 | ata_dev_info(dev, "Port Multiplier detaching\n"); |
3af9a77a TH |
561 | |
562 | WARN_ON(!ata_is_host_link(link) || dev->devno || | |
563 | link->pmp != SATA_PMP_CTRL_PORT); | |
564 | ||
565 | if (ap->ops->pmp_detach) | |
566 | ap->ops->pmp_detach(ap); | |
567 | ||
1eca4365 | 568 | ata_for_each_link(tlink, ap, EDGE) |
3af9a77a TH |
569 | ata_eh_detach_dev(tlink->device); |
570 | ||
571 | spin_lock_irqsave(ap->lock, flags); | |
572 | ap->nr_pmp_links = 0; | |
573 | link->pmp = 0; | |
574 | spin_unlock_irqrestore(ap->lock, flags); | |
d0df8b5d TH |
575 | |
576 | ata_acpi_associate_sata_port(ap); | |
3af9a77a TH |
577 | } |
578 | ||
579 | /** | |
580 | * sata_pmp_same_pmp - does new GSCR matches the configured PMP? | |
581 | * @dev: PMP device to compare against | |
582 | * @new_gscr: GSCR block of the new device | |
583 | * | |
584 | * Compare @new_gscr against @dev and determine whether @dev is | |
585 | * the PMP described by @new_gscr. | |
586 | * | |
587 | * LOCKING: | |
588 | * None. | |
589 | * | |
590 | * RETURNS: | |
591 | * 1 if @dev matches @new_gscr, 0 otherwise. | |
592 | */ | |
593 | static int sata_pmp_same_pmp(struct ata_device *dev, const u32 *new_gscr) | |
594 | { | |
595 | const u32 *old_gscr = dev->gscr; | |
596 | u16 old_vendor, new_vendor, old_devid, new_devid; | |
597 | int old_nr_ports, new_nr_ports; | |
598 | ||
599 | old_vendor = sata_pmp_gscr_vendor(old_gscr); | |
600 | new_vendor = sata_pmp_gscr_vendor(new_gscr); | |
601 | old_devid = sata_pmp_gscr_devid(old_gscr); | |
602 | new_devid = sata_pmp_gscr_devid(new_gscr); | |
603 | old_nr_ports = sata_pmp_gscr_ports(old_gscr); | |
604 | new_nr_ports = sata_pmp_gscr_ports(new_gscr); | |
605 | ||
606 | if (old_vendor != new_vendor) { | |
a9a79dfe JP |
607 | ata_dev_info(dev, |
608 | "Port Multiplier vendor mismatch '0x%x' != '0x%x'\n", | |
609 | old_vendor, new_vendor); | |
3af9a77a TH |
610 | return 0; |
611 | } | |
612 | ||
613 | if (old_devid != new_devid) { | |
a9a79dfe JP |
614 | ata_dev_info(dev, |
615 | "Port Multiplier device ID mismatch '0x%x' != '0x%x'\n", | |
616 | old_devid, new_devid); | |
3af9a77a TH |
617 | return 0; |
618 | } | |
619 | ||
620 | if (old_nr_ports != new_nr_ports) { | |
a9a79dfe JP |
621 | ata_dev_info(dev, |
622 | "Port Multiplier nr_ports mismatch '0x%x' != '0x%x'\n", | |
623 | old_nr_ports, new_nr_ports); | |
3af9a77a TH |
624 | return 0; |
625 | } | |
626 | ||
627 | return 1; | |
628 | } | |
629 | ||
630 | /** | |
631 | * sata_pmp_revalidate - revalidate SATA PMP | |
632 | * @dev: PMP device to revalidate | |
633 | * @new_class: new class code | |
634 | * | |
635 | * Re-read GSCR block and make sure @dev is still attached to the | |
636 | * port and properly configured. | |
637 | * | |
638 | * LOCKING: | |
639 | * Kernel thread context (may sleep). | |
640 | * | |
641 | * RETURNS: | |
642 | * 0 on success, -errno otherwise. | |
643 | */ | |
644 | static int sata_pmp_revalidate(struct ata_device *dev, unsigned int new_class) | |
645 | { | |
646 | struct ata_link *link = dev->link; | |
647 | struct ata_port *ap = link->ap; | |
648 | u32 *gscr = (void *)ap->sector_buf; | |
649 | int rc; | |
650 | ||
651 | DPRINTK("ENTER\n"); | |
652 | ||
653 | ata_eh_about_to_do(link, NULL, ATA_EH_REVALIDATE); | |
654 | ||
655 | if (!ata_dev_enabled(dev)) { | |
656 | rc = -ENODEV; | |
657 | goto fail; | |
658 | } | |
659 | ||
660 | /* wrong class? */ | |
661 | if (ata_class_enabled(new_class) && new_class != ATA_DEV_PMP) { | |
662 | rc = -ENODEV; | |
663 | goto fail; | |
664 | } | |
665 | ||
666 | /* read GSCR */ | |
667 | rc = sata_pmp_read_gscr(dev, gscr); | |
668 | if (rc) | |
669 | goto fail; | |
670 | ||
671 | /* is the pmp still there? */ | |
672 | if (!sata_pmp_same_pmp(dev, gscr)) { | |
673 | rc = -ENODEV; | |
674 | goto fail; | |
675 | } | |
676 | ||
677 | memcpy(dev->gscr, gscr, sizeof(gscr[0]) * SATA_PMP_GSCR_DWORDS); | |
678 | ||
679 | rc = sata_pmp_configure(dev, 0); | |
680 | if (rc) | |
681 | goto fail; | |
682 | ||
683 | ata_eh_done(link, NULL, ATA_EH_REVALIDATE); | |
684 | ||
685 | DPRINTK("EXIT, rc=0\n"); | |
686 | return 0; | |
687 | ||
688 | fail: | |
a9a79dfe | 689 | ata_dev_err(dev, "PMP revalidation failed (errno=%d)\n", rc); |
3af9a77a TH |
690 | DPRINTK("EXIT, rc=%d\n", rc); |
691 | return rc; | |
692 | } | |
693 | ||
694 | /** | |
695 | * sata_pmp_revalidate_quick - revalidate SATA PMP quickly | |
696 | * @dev: PMP device to revalidate | |
697 | * | |
698 | * Make sure the attached PMP is accessible. | |
699 | * | |
700 | * LOCKING: | |
701 | * Kernel thread context (may sleep). | |
702 | * | |
703 | * RETURNS: | |
704 | * 0 on success, -errno otherwise. | |
705 | */ | |
706 | static int sata_pmp_revalidate_quick(struct ata_device *dev) | |
707 | { | |
b06ce3e5 | 708 | unsigned int err_mask; |
3af9a77a | 709 | u32 prod_id; |
3af9a77a | 710 | |
b06ce3e5 TH |
711 | err_mask = sata_pmp_read(dev->link, SATA_PMP_GSCR_PROD_ID, &prod_id); |
712 | if (err_mask) { | |
a9a79dfe JP |
713 | ata_dev_err(dev, |
714 | "failed to read PMP product ID (Emask=0x%x)\n", | |
715 | err_mask); | |
b06ce3e5 | 716 | return -EIO; |
3af9a77a TH |
717 | } |
718 | ||
719 | if (prod_id != dev->gscr[SATA_PMP_GSCR_PROD_ID]) { | |
a9a79dfe | 720 | ata_dev_err(dev, "PMP product ID mismatch\n"); |
3af9a77a TH |
721 | /* something weird is going on, request full PMP recovery */ |
722 | return -EIO; | |
723 | } | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
728 | /** | |
729 | * sata_pmp_eh_recover_pmp - recover PMP | |
730 | * @ap: ATA port PMP is attached to | |
731 | * @prereset: prereset method (can be NULL) | |
732 | * @softreset: softreset method | |
733 | * @hardreset: hardreset method | |
734 | * @postreset: postreset method (can be NULL) | |
735 | * | |
736 | * Recover PMP attached to @ap. Recovery procedure is somewhat | |
737 | * similar to that of ata_eh_recover() except that reset should | |
738 | * always be performed in hard->soft sequence and recovery | |
739 | * failure results in PMP detachment. | |
740 | * | |
741 | * LOCKING: | |
742 | * Kernel thread context (may sleep). | |
743 | * | |
744 | * RETURNS: | |
745 | * 0 on success, -errno on failure. | |
746 | */ | |
747 | static int sata_pmp_eh_recover_pmp(struct ata_port *ap, | |
748 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
749 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
750 | { | |
751 | struct ata_link *link = &ap->link; | |
752 | struct ata_eh_context *ehc = &link->eh_context; | |
753 | struct ata_device *dev = link->device; | |
754 | int tries = ATA_EH_PMP_TRIES; | |
755 | int detach = 0, rc = 0; | |
756 | int reval_failed = 0; | |
757 | ||
758 | DPRINTK("ENTER\n"); | |
759 | ||
760 | if (dev->flags & ATA_DFLAG_DETACH) { | |
761 | detach = 1; | |
762 | goto fail; | |
763 | } | |
764 | ||
765 | retry: | |
766 | ehc->classes[0] = ATA_DEV_UNKNOWN; | |
767 | ||
cf480626 | 768 | if (ehc->i.action & ATA_EH_RESET) { |
3af9a77a TH |
769 | struct ata_link *tlink; |
770 | ||
3af9a77a | 771 | /* reset */ |
3af9a77a TH |
772 | rc = ata_eh_reset(link, 0, prereset, softreset, hardreset, |
773 | postreset); | |
774 | if (rc) { | |
a9a79dfe | 775 | ata_link_err(link, "failed to reset PMP, giving up\n"); |
3af9a77a TH |
776 | goto fail; |
777 | } | |
778 | ||
3af9a77a | 779 | /* PMP is reset, SErrors cannot be trusted, scan all */ |
1eca4365 | 780 | ata_for_each_link(tlink, ap, EDGE) { |
b558eddd TH |
781 | struct ata_eh_context *ehc = &tlink->eh_context; |
782 | ||
783 | ehc->i.probe_mask |= ATA_ALL_DEVICES; | |
784 | ehc->i.action |= ATA_EH_RESET; | |
785 | } | |
3af9a77a TH |
786 | } |
787 | ||
788 | /* If revalidation is requested, revalidate and reconfigure; | |
789 | * otherwise, do quick revalidation. | |
790 | */ | |
791 | if (ehc->i.action & ATA_EH_REVALIDATE) | |
792 | rc = sata_pmp_revalidate(dev, ehc->classes[0]); | |
793 | else | |
794 | rc = sata_pmp_revalidate_quick(dev); | |
795 | ||
796 | if (rc) { | |
797 | tries--; | |
798 | ||
799 | if (rc == -ENODEV) { | |
b558eddd | 800 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
3af9a77a TH |
801 | detach = 1; |
802 | /* give it just two more chances */ | |
803 | tries = min(tries, 2); | |
804 | } | |
805 | ||
806 | if (tries) { | |
3af9a77a TH |
807 | /* consecutive revalidation failures? speed down */ |
808 | if (reval_failed) | |
a07d499b | 809 | sata_down_spd_limit(link, 0); |
3af9a77a TH |
810 | else |
811 | reval_failed = 1; | |
812 | ||
cf480626 | 813 | ehc->i.action |= ATA_EH_RESET; |
3af9a77a TH |
814 | goto retry; |
815 | } else { | |
a9a79dfe JP |
816 | ata_dev_err(dev, |
817 | "failed to recover PMP after %d tries, giving up\n", | |
818 | ATA_EH_PMP_TRIES); | |
3af9a77a TH |
819 | goto fail; |
820 | } | |
821 | } | |
822 | ||
823 | /* okay, PMP resurrected */ | |
824 | ehc->i.flags = 0; | |
825 | ||
826 | DPRINTK("EXIT, rc=0\n"); | |
827 | return 0; | |
828 | ||
829 | fail: | |
830 | sata_pmp_detach(dev); | |
831 | if (detach) | |
832 | ata_eh_detach_dev(dev); | |
833 | else | |
834 | ata_dev_disable(dev); | |
835 | ||
836 | DPRINTK("EXIT, rc=%d\n", rc); | |
837 | return rc; | |
838 | } | |
839 | ||
840 | static int sata_pmp_eh_handle_disabled_links(struct ata_port *ap) | |
841 | { | |
842 | struct ata_link *link; | |
843 | unsigned long flags; | |
844 | int rc; | |
845 | ||
846 | spin_lock_irqsave(ap->lock, flags); | |
847 | ||
1eca4365 | 848 | ata_for_each_link(link, ap, EDGE) { |
3af9a77a TH |
849 | if (!(link->flags & ATA_LFLAG_DISABLED)) |
850 | continue; | |
851 | ||
852 | spin_unlock_irqrestore(ap->lock, flags); | |
853 | ||
854 | /* Some PMPs require hardreset sequence to get | |
855 | * SError.N working. | |
856 | */ | |
cf480626 | 857 | sata_link_hardreset(link, sata_deb_timing_normal, |
341c2c95 TH |
858 | ata_deadline(jiffies, ATA_TMOUT_INTERNAL_QUICK), |
859 | NULL, NULL); | |
3af9a77a TH |
860 | |
861 | /* unconditionally clear SError.N */ | |
862 | rc = sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG); | |
863 | if (rc) { | |
a9a79dfe JP |
864 | ata_link_err(link, |
865 | "failed to clear SError.N (errno=%d)\n", | |
866 | rc); | |
3af9a77a TH |
867 | return rc; |
868 | } | |
869 | ||
870 | spin_lock_irqsave(ap->lock, flags); | |
871 | } | |
872 | ||
873 | spin_unlock_irqrestore(ap->lock, flags); | |
874 | ||
875 | return 0; | |
876 | } | |
877 | ||
878 | static int sata_pmp_handle_link_fail(struct ata_link *link, int *link_tries) | |
879 | { | |
880 | struct ata_port *ap = link->ap; | |
881 | unsigned long flags; | |
882 | ||
883 | if (link_tries[link->pmp] && --link_tries[link->pmp]) | |
884 | return 1; | |
885 | ||
886 | /* disable this link */ | |
887 | if (!(link->flags & ATA_LFLAG_DISABLED)) { | |
a9a79dfe | 888 | ata_link_warn(link, |
3af9a77a TH |
889 | "failed to recover link after %d tries, disabling\n", |
890 | ATA_EH_PMP_LINK_TRIES); | |
891 | ||
892 | spin_lock_irqsave(ap->lock, flags); | |
893 | link->flags |= ATA_LFLAG_DISABLED; | |
894 | spin_unlock_irqrestore(ap->lock, flags); | |
895 | } | |
896 | ||
897 | ata_dev_disable(link->device); | |
898 | link->eh_context.i.action = 0; | |
899 | ||
900 | return 0; | |
901 | } | |
902 | ||
903 | /** | |
904 | * sata_pmp_eh_recover - recover PMP-enabled port | |
905 | * @ap: ATA port to recover | |
3af9a77a TH |
906 | * |
907 | * Drive EH recovery operation for PMP enabled port @ap. This | |
908 | * function recovers host and PMP ports with proper retrials and | |
909 | * fallbacks. Actual recovery operations are performed using | |
910 | * ata_eh_recover() and sata_pmp_eh_recover_pmp(). | |
911 | * | |
912 | * LOCKING: | |
913 | * Kernel thread context (may sleep). | |
914 | * | |
915 | * RETURNS: | |
916 | * 0 on success, -errno on failure. | |
917 | */ | |
a1efdaba | 918 | static int sata_pmp_eh_recover(struct ata_port *ap) |
3af9a77a | 919 | { |
a1efdaba | 920 | struct ata_port_operations *ops = ap->ops; |
3af9a77a TH |
921 | int pmp_tries, link_tries[SATA_PMP_MAX_PORTS]; |
922 | struct ata_link *pmp_link = &ap->link; | |
923 | struct ata_device *pmp_dev = pmp_link->device; | |
924 | struct ata_eh_context *pmp_ehc = &pmp_link->eh_context; | |
f1bbfb90 | 925 | u32 *gscr = pmp_dev->gscr; |
3af9a77a TH |
926 | struct ata_link *link; |
927 | struct ata_device *dev; | |
b06ce3e5 | 928 | unsigned int err_mask; |
3af9a77a TH |
929 | u32 gscr_error, sntf; |
930 | int cnt, rc; | |
931 | ||
932 | pmp_tries = ATA_EH_PMP_TRIES; | |
1eca4365 | 933 | ata_for_each_link(link, ap, EDGE) |
3af9a77a TH |
934 | link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES; |
935 | ||
936 | retry: | |
937 | /* PMP attached? */ | |
071f44b1 | 938 | if (!sata_pmp_attached(ap)) { |
a1efdaba TH |
939 | rc = ata_eh_recover(ap, ops->prereset, ops->softreset, |
940 | ops->hardreset, ops->postreset, NULL); | |
3af9a77a | 941 | if (rc) { |
1eca4365 | 942 | ata_for_each_dev(dev, &ap->link, ALL) |
3af9a77a TH |
943 | ata_dev_disable(dev); |
944 | return rc; | |
945 | } | |
946 | ||
947 | if (pmp_dev->class != ATA_DEV_PMP) | |
948 | return 0; | |
949 | ||
950 | /* new PMP online */ | |
1eca4365 | 951 | ata_for_each_link(link, ap, EDGE) |
3af9a77a TH |
952 | link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES; |
953 | ||
954 | /* fall through */ | |
955 | } | |
956 | ||
957 | /* recover pmp */ | |
a1efdaba TH |
958 | rc = sata_pmp_eh_recover_pmp(ap, ops->prereset, ops->softreset, |
959 | ops->hardreset, ops->postreset); | |
3af9a77a TH |
960 | if (rc) |
961 | goto pmp_fail; | |
962 | ||
f1bbfb90 TH |
963 | /* PHY event notification can disturb reset and other recovery |
964 | * operations. Turn it off. | |
965 | */ | |
966 | if (gscr[SATA_PMP_GSCR_FEAT_EN] & SATA_PMP_FEAT_NOTIFY) { | |
967 | gscr[SATA_PMP_GSCR_FEAT_EN] &= ~SATA_PMP_FEAT_NOTIFY; | |
968 | ||
969 | err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN, | |
970 | gscr[SATA_PMP_GSCR_FEAT_EN]); | |
971 | if (err_mask) { | |
a9a79dfe | 972 | ata_link_warn(pmp_link, |
f1bbfb90 TH |
973 | "failed to disable NOTIFY (err_mask=0x%x)\n", |
974 | err_mask); | |
975 | goto pmp_fail; | |
976 | } | |
977 | } | |
978 | ||
3af9a77a TH |
979 | /* handle disabled links */ |
980 | rc = sata_pmp_eh_handle_disabled_links(ap); | |
981 | if (rc) | |
982 | goto pmp_fail; | |
983 | ||
984 | /* recover links */ | |
a1efdaba TH |
985 | rc = ata_eh_recover(ap, ops->pmp_prereset, ops->pmp_softreset, |
986 | ops->pmp_hardreset, ops->pmp_postreset, &link); | |
3af9a77a TH |
987 | if (rc) |
988 | goto link_fail; | |
989 | ||
3af9a77a TH |
990 | /* clear SNotification */ |
991 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
992 | if (rc == 0) | |
993 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
994 | ||
6c8ea89c TH |
995 | /* |
996 | * If LPM is active on any fan-out port, hotplug wouldn't | |
997 | * work. Return w/ PHY event notification disabled. | |
998 | */ | |
999 | ata_for_each_link(link, ap, EDGE) | |
1000 | if (link->lpm_policy > ATA_LPM_MAX_POWER) | |
1001 | return 0; | |
1002 | ||
1003 | /* | |
1004 | * Connection status might have changed while resetting other | |
1005 | * links, enable notification and check SATA_PMP_GSCR_ERROR | |
1006 | * before returning. | |
1007 | */ | |
1008 | ||
3af9a77a TH |
1009 | /* enable notification */ |
1010 | if (pmp_dev->flags & ATA_DFLAG_AN) { | |
f1bbfb90 | 1011 | gscr[SATA_PMP_GSCR_FEAT_EN] |= SATA_PMP_FEAT_NOTIFY; |
3af9a77a | 1012 | |
f1bbfb90 TH |
1013 | err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN, |
1014 | gscr[SATA_PMP_GSCR_FEAT_EN]); | |
b06ce3e5 | 1015 | if (err_mask) { |
a9a79dfe JP |
1016 | ata_dev_err(pmp_dev, |
1017 | "failed to write PMP_FEAT_EN (Emask=0x%x)\n", | |
1018 | err_mask); | |
b06ce3e5 | 1019 | rc = -EIO; |
3af9a77a TH |
1020 | goto pmp_fail; |
1021 | } | |
1022 | } | |
1023 | ||
1024 | /* check GSCR_ERROR */ | |
b06ce3e5 TH |
1025 | err_mask = sata_pmp_read(pmp_link, SATA_PMP_GSCR_ERROR, &gscr_error); |
1026 | if (err_mask) { | |
a9a79dfe JP |
1027 | ata_dev_err(pmp_dev, |
1028 | "failed to read PMP_GSCR_ERROR (Emask=0x%x)\n", | |
1029 | err_mask); | |
b06ce3e5 | 1030 | rc = -EIO; |
3af9a77a TH |
1031 | goto pmp_fail; |
1032 | } | |
1033 | ||
1034 | cnt = 0; | |
1eca4365 | 1035 | ata_for_each_link(link, ap, EDGE) { |
3af9a77a TH |
1036 | if (!(gscr_error & (1 << link->pmp))) |
1037 | continue; | |
1038 | ||
1039 | if (sata_pmp_handle_link_fail(link, link_tries)) { | |
1040 | ata_ehi_hotplugged(&link->eh_context.i); | |
1041 | cnt++; | |
1042 | } else { | |
a9a79dfe JP |
1043 | ata_link_warn(link, |
1044 | "PHY status changed but maxed out on retries, giving up\n"); | |
1045 | ata_link_warn(link, | |
1046 | "Manually issue scan to resume this link\n"); | |
3af9a77a TH |
1047 | } |
1048 | } | |
1049 | ||
1050 | if (cnt) { | |
a9a79dfe JP |
1051 | ata_port_info(ap, |
1052 | "PMP SError.N set for some ports, repeating recovery\n"); | |
3af9a77a TH |
1053 | goto retry; |
1054 | } | |
1055 | ||
1056 | return 0; | |
1057 | ||
1058 | link_fail: | |
1059 | if (sata_pmp_handle_link_fail(link, link_tries)) { | |
cf480626 | 1060 | pmp_ehc->i.action |= ATA_EH_RESET; |
3af9a77a TH |
1061 | goto retry; |
1062 | } | |
1063 | ||
1064 | /* fall through */ | |
1065 | pmp_fail: | |
1066 | /* Control always ends up here after detaching PMP. Shut up | |
1067 | * and return if we're unloading. | |
1068 | */ | |
1069 | if (ap->pflags & ATA_PFLAG_UNLOADING) | |
1070 | return rc; | |
1071 | ||
071f44b1 | 1072 | if (!sata_pmp_attached(ap)) |
3af9a77a TH |
1073 | goto retry; |
1074 | ||
1075 | if (--pmp_tries) { | |
cf480626 | 1076 | pmp_ehc->i.action |= ATA_EH_RESET; |
3af9a77a TH |
1077 | goto retry; |
1078 | } | |
1079 | ||
a9a79dfe JP |
1080 | ata_port_err(ap, "failed to recover PMP after %d tries, giving up\n", |
1081 | ATA_EH_PMP_TRIES); | |
3af9a77a TH |
1082 | sata_pmp_detach(pmp_dev); |
1083 | ata_dev_disable(pmp_dev); | |
1084 | ||
1085 | return rc; | |
1086 | } | |
1087 | ||
1088 | /** | |
a1efdaba | 1089 | * sata_pmp_error_handler - do standard error handling for PMP-enabled host |
3af9a77a | 1090 | * @ap: host port to handle error for |
3af9a77a TH |
1091 | * |
1092 | * Perform standard error handling sequence for PMP-enabled host | |
1093 | * @ap. | |
1094 | * | |
1095 | * LOCKING: | |
1096 | * Kernel thread context (may sleep). | |
1097 | */ | |
a1efdaba | 1098 | void sata_pmp_error_handler(struct ata_port *ap) |
3af9a77a TH |
1099 | { |
1100 | ata_eh_autopsy(ap); | |
1101 | ata_eh_report(ap); | |
a1efdaba | 1102 | sata_pmp_eh_recover(ap); |
3af9a77a TH |
1103 | ata_eh_finish(ap); |
1104 | } | |
48515f6c TH |
1105 | |
1106 | EXPORT_SYMBOL_GPL(sata_pmp_port_ops); | |
1107 | EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); | |
1108 | EXPORT_SYMBOL_GPL(sata_pmp_error_handler); |