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> | |
38789fda | 11 | #include <linux/export.h> |
3af9a77a | 12 | #include <linux/libata.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
3af9a77a | 14 | #include "libata.h" |
d9027470 | 15 | #include "libata-transport.h" |
3af9a77a | 16 | |
48515f6c TH |
17 | const struct ata_port_operations sata_pmp_port_ops = { |
18 | .inherits = &sata_port_ops, | |
19 | .pmp_prereset = ata_std_prereset, | |
20 | .pmp_hardreset = sata_std_hardreset, | |
21 | .pmp_postreset = ata_std_postreset, | |
22 | .error_handler = sata_pmp_error_handler, | |
23 | }; | |
24 | ||
3af9a77a TH |
25 | /** |
26 | * sata_pmp_read - read PMP register | |
27 | * @link: link to read PMP register for | |
28 | * @reg: register to read | |
29 | * @r_val: resulting value | |
30 | * | |
b06ce3e5 | 31 | * Read PMP register. |
3af9a77a TH |
32 | * |
33 | * LOCKING: | |
34 | * Kernel thread context (may sleep). | |
35 | * | |
36 | * RETURNS: | |
b06ce3e5 | 37 | * 0 on success, AC_ERR_* mask on failure. |
3af9a77a | 38 | */ |
b06ce3e5 | 39 | static unsigned int sata_pmp_read(struct ata_link *link, int reg, u32 *r_val) |
3af9a77a TH |
40 | { |
41 | struct ata_port *ap = link->ap; | |
42 | struct ata_device *pmp_dev = ap->link.device; | |
b06ce3e5 TH |
43 | struct ata_taskfile tf; |
44 | unsigned int err_mask; | |
45 | ||
46 | ata_tf_init(pmp_dev, &tf); | |
47 | tf.command = ATA_CMD_PMP_READ; | |
48 | tf.protocol = ATA_PROT_NODATA; | |
39f25e70 | 49 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; |
b06ce3e5 TH |
50 | tf.feature = reg; |
51 | tf.device = link->pmp; | |
52 | ||
53 | err_mask = ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0, | |
bf1bff6f | 54 | SATA_PMP_RW_TIMEOUT); |
b06ce3e5 TH |
55 | if (err_mask) |
56 | return err_mask; | |
57 | ||
58 | *r_val = tf.nsect | tf.lbal << 8 | tf.lbam << 16 | tf.lbah << 24; | |
59 | return 0; | |
3af9a77a TH |
60 | } |
61 | ||
62 | /** | |
63 | * sata_pmp_write - write PMP register | |
64 | * @link: link to write PMP register for | |
65 | * @reg: register to write | |
66 | * @r_val: value to write | |
67 | * | |
b06ce3e5 | 68 | * Write PMP register. |
3af9a77a TH |
69 | * |
70 | * LOCKING: | |
71 | * Kernel thread context (may sleep). | |
72 | * | |
73 | * RETURNS: | |
b06ce3e5 | 74 | * 0 on success, AC_ERR_* mask on failure. |
3af9a77a | 75 | */ |
b06ce3e5 | 76 | static unsigned int sata_pmp_write(struct ata_link *link, int reg, u32 val) |
3af9a77a TH |
77 | { |
78 | struct ata_port *ap = link->ap; | |
79 | struct ata_device *pmp_dev = ap->link.device; | |
b06ce3e5 TH |
80 | struct ata_taskfile tf; |
81 | ||
82 | ata_tf_init(pmp_dev, &tf); | |
83 | tf.command = ATA_CMD_PMP_WRITE; | |
84 | tf.protocol = ATA_PROT_NODATA; | |
39f25e70 | 85 | tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; |
b06ce3e5 TH |
86 | tf.feature = reg; |
87 | tf.device = link->pmp; | |
88 | tf.nsect = val & 0xff; | |
89 | tf.lbal = (val >> 8) & 0xff; | |
90 | tf.lbam = (val >> 16) & 0xff; | |
91 | tf.lbah = (val >> 24) & 0xff; | |
92 | ||
93 | return ata_exec_internal(pmp_dev, &tf, NULL, DMA_NONE, NULL, 0, | |
bf1bff6f | 94 | SATA_PMP_RW_TIMEOUT); |
3af9a77a TH |
95 | } |
96 | ||
31f88384 TH |
97 | /** |
98 | * sata_pmp_qc_defer_cmd_switch - qc_defer for command switching PMP | |
99 | * @qc: ATA command in question | |
100 | * | |
101 | * A host which has command switching PMP support cannot issue | |
102 | * commands to multiple links simultaneously. | |
103 | * | |
104 | * LOCKING: | |
105 | * spin_lock_irqsave(host lock) | |
106 | * | |
107 | * RETURNS: | |
108 | * ATA_DEFER_* if deferring is needed, 0 otherwise. | |
109 | */ | |
110 | int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc) | |
111 | { | |
112 | struct ata_link *link = qc->dev->link; | |
113 | struct ata_port *ap = link->ap; | |
114 | ||
115 | if (ap->excl_link == NULL || ap->excl_link == link) { | |
116 | if (ap->nr_active_links == 0 || ata_link_active(link)) { | |
117 | qc->flags |= ATA_QCFLAG_CLEAR_EXCL; | |
118 | return ata_std_qc_defer(qc); | |
119 | } | |
120 | ||
121 | ap->excl_link = link; | |
122 | } | |
123 | ||
124 | return ATA_DEFER_PORT; | |
125 | } | |
126 | ||
3af9a77a TH |
127 | /** |
128 | * sata_pmp_scr_read - read PSCR | |
129 | * @link: ATA link to read PSCR for | |
130 | * @reg: PSCR to read | |
131 | * @r_val: resulting value | |
132 | * | |
133 | * Read PSCR @reg into @r_val for @link, to be called from | |
134 | * ata_scr_read(). | |
135 | * | |
136 | * LOCKING: | |
137 | * Kernel thread context (may sleep). | |
138 | * | |
139 | * RETURNS: | |
140 | * 0 on success, -errno on failure. | |
141 | */ | |
142 | int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *r_val) | |
143 | { | |
b06ce3e5 TH |
144 | unsigned int err_mask; |
145 | ||
3af9a77a TH |
146 | if (reg > SATA_PMP_PSCR_CONTROL) |
147 | return -EINVAL; | |
148 | ||
b06ce3e5 TH |
149 | err_mask = sata_pmp_read(link, reg, r_val); |
150 | if (err_mask) { | |
a9a79dfe JP |
151 | ata_link_warn(link, "failed to read SCR %d (Emask=0x%x)\n", |
152 | reg, err_mask); | |
b06ce3e5 TH |
153 | return -EIO; |
154 | } | |
155 | return 0; | |
3af9a77a TH |
156 | } |
157 | ||
158 | /** | |
159 | * sata_pmp_scr_write - write PSCR | |
160 | * @link: ATA link to write PSCR for | |
161 | * @reg: PSCR to write | |
162 | * @val: value to be written | |
163 | * | |
164 | * Write @val to PSCR @reg for @link, to be called from | |
165 | * ata_scr_write() and ata_scr_write_flush(). | |
166 | * | |
167 | * LOCKING: | |
168 | * Kernel thread context (may sleep). | |
169 | * | |
170 | * RETURNS: | |
171 | * 0 on success, -errno on failure. | |
172 | */ | |
173 | int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val) | |
174 | { | |
b06ce3e5 TH |
175 | unsigned int err_mask; |
176 | ||
3af9a77a TH |
177 | if (reg > SATA_PMP_PSCR_CONTROL) |
178 | return -EINVAL; | |
179 | ||
b06ce3e5 TH |
180 | err_mask = sata_pmp_write(link, reg, val); |
181 | if (err_mask) { | |
a9a79dfe JP |
182 | ata_link_warn(link, "failed to write SCR %d (Emask=0x%x)\n", |
183 | reg, err_mask); | |
b06ce3e5 TH |
184 | return -EIO; |
185 | } | |
186 | return 0; | |
3af9a77a TH |
187 | } |
188 | ||
6c8ea89c TH |
189 | /** |
190 | * sata_pmp_set_lpm - configure LPM for a PMP link | |
191 | * @link: PMP link to configure LPM for | |
192 | * @policy: target LPM policy | |
193 | * @hints: LPM hints | |
194 | * | |
195 | * Configure LPM for @link. This function will contain any PMP | |
196 | * specific workarounds if necessary. | |
197 | * | |
198 | * LOCKING: | |
199 | * EH context. | |
200 | * | |
201 | * RETURNS: | |
202 | * 0 on success, -errno on failure. | |
203 | */ | |
204 | int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, | |
205 | unsigned hints) | |
206 | { | |
207 | return sata_link_scr_lpm(link, policy, true); | |
208 | } | |
209 | ||
3af9a77a TH |
210 | /** |
211 | * sata_pmp_read_gscr - read GSCR block of SATA PMP | |
212 | * @dev: PMP device | |
213 | * @gscr: buffer to read GSCR block into | |
214 | * | |
215 | * Read selected PMP GSCRs from the PMP at @dev. This will serve | |
216 | * as configuration and identification info for the PMP. | |
217 | * | |
218 | * LOCKING: | |
219 | * Kernel thread context (may sleep). | |
220 | * | |
221 | * RETURNS: | |
222 | * 0 on success, -errno on failure. | |
223 | */ | |
224 | static int sata_pmp_read_gscr(struct ata_device *dev, u32 *gscr) | |
225 | { | |
226 | static const int gscr_to_read[] = { 0, 1, 2, 32, 33, 64, 96 }; | |
b06ce3e5 | 227 | int i; |
3af9a77a TH |
228 | |
229 | for (i = 0; i < ARRAY_SIZE(gscr_to_read); i++) { | |
230 | int reg = gscr_to_read[i]; | |
b06ce3e5 | 231 | unsigned int err_mask; |
3af9a77a | 232 | |
b06ce3e5 TH |
233 | err_mask = sata_pmp_read(dev->link, reg, &gscr[reg]); |
234 | if (err_mask) { | |
a9a79dfe JP |
235 | ata_dev_err(dev, "failed to read PMP GSCR[%d] (Emask=0x%x)\n", |
236 | reg, err_mask); | |
b06ce3e5 | 237 | return -EIO; |
3af9a77a TH |
238 | } |
239 | } | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | static const char *sata_pmp_spec_rev_str(const u32 *gscr) | |
245 | { | |
246 | u32 rev = gscr[SATA_PMP_GSCR_REV]; | |
247 | ||
deeb003e SH |
248 | if (rev & (1 << 3)) |
249 | return "1.2"; | |
3af9a77a TH |
250 | if (rev & (1 << 2)) |
251 | return "1.1"; | |
252 | if (rev & (1 << 1)) | |
253 | return "1.0"; | |
254 | return "<unknown>"; | |
255 | } | |
256 | ||
4f2c7748 GG |
257 | #define PMP_GSCR_SII_POL 129 |
258 | ||
3af9a77a TH |
259 | static int sata_pmp_configure(struct ata_device *dev, int print_info) |
260 | { | |
261 | struct ata_port *ap = dev->link->ap; | |
262 | u32 *gscr = dev->gscr; | |
4f2c7748 GG |
263 | u16 vendor = sata_pmp_gscr_vendor(gscr); |
264 | u16 devid = sata_pmp_gscr_devid(gscr); | |
b06ce3e5 | 265 | unsigned int err_mask = 0; |
3af9a77a TH |
266 | const char *reason; |
267 | int nr_ports, rc; | |
268 | ||
269 | nr_ports = sata_pmp_gscr_ports(gscr); | |
270 | ||
271 | if (nr_ports <= 0 || nr_ports > SATA_PMP_MAX_PORTS) { | |
272 | rc = -EINVAL; | |
273 | reason = "invalid nr_ports"; | |
274 | goto fail; | |
275 | } | |
276 | ||
277 | if ((ap->flags & ATA_FLAG_AN) && | |
278 | (gscr[SATA_PMP_GSCR_FEAT] & SATA_PMP_FEAT_NOTIFY)) | |
279 | dev->flags |= ATA_DFLAG_AN; | |
280 | ||
281 | /* monitor SERR_PHYRDY_CHG on fan-out ports */ | |
b06ce3e5 TH |
282 | err_mask = sata_pmp_write(dev->link, SATA_PMP_GSCR_ERROR_EN, |
283 | SERR_PHYRDY_CHG); | |
284 | if (err_mask) { | |
285 | rc = -EIO; | |
3af9a77a TH |
286 | reason = "failed to write GSCR_ERROR_EN"; |
287 | goto fail; | |
288 | } | |
289 | ||
4f2c7748 GG |
290 | /* Disable sending Early R_OK. |
291 | * With "cached read" HDD testing and multiple ports busy on a SATA | |
8ffff94d | 292 | * host controller, 3x26 PMP will very rarely drop a deferred |
4f2c7748 GG |
293 | * R_OK that was intended for the host. Symptom will be all |
294 | * 5 drives under test will timeout, get reset, and recover. | |
295 | */ | |
8ffff94d | 296 | if (vendor == 0x1095 && (devid == 0x3726 || devid == 0x3826)) { |
4f2c7748 GG |
297 | u32 reg; |
298 | ||
299 | err_mask = sata_pmp_read(&ap->link, PMP_GSCR_SII_POL, ®); | |
300 | if (err_mask) { | |
301 | rc = -EIO; | |
8ffff94d | 302 | reason = "failed to read Sil3x26 Private Register"; |
4f2c7748 GG |
303 | goto fail; |
304 | } | |
305 | reg &= ~0x1; | |
306 | err_mask = sata_pmp_write(&ap->link, PMP_GSCR_SII_POL, reg); | |
307 | if (err_mask) { | |
308 | rc = -EIO; | |
8ffff94d | 309 | reason = "failed to write Sil3x26 Private Register"; |
4f2c7748 GG |
310 | goto fail; |
311 | } | |
312 | } | |
313 | ||
3af9a77a | 314 | if (print_info) { |
a9a79dfe JP |
315 | ata_dev_info(dev, "Port Multiplier %s, " |
316 | "0x%04x:0x%04x r%d, %d ports, feat 0x%x/0x%x\n", | |
317 | sata_pmp_spec_rev_str(gscr), vendor, devid, | |
318 | sata_pmp_gscr_rev(gscr), | |
319 | nr_ports, gscr[SATA_PMP_GSCR_FEAT_EN], | |
320 | gscr[SATA_PMP_GSCR_FEAT]); | |
3af9a77a TH |
321 | |
322 | if (!(dev->flags & ATA_DFLAG_AN)) | |
a9a79dfe | 323 | ata_dev_info(dev, |
3af9a77a | 324 | "Asynchronous notification not supported, " |
a9a79dfe | 325 | "hotplug won't work on fan-out ports. Use warm-plug instead.\n"); |
3af9a77a TH |
326 | } |
327 | ||
328 | return 0; | |
329 | ||
330 | fail: | |
a9a79dfe JP |
331 | ata_dev_err(dev, |
332 | "failed to configure Port Multiplier (%s, Emask=0x%x)\n", | |
333 | reason, err_mask); | |
3af9a77a TH |
334 | return rc; |
335 | } | |
336 | ||
d9027470 | 337 | static int sata_pmp_init_links (struct ata_port *ap, int nr_ports) |
3af9a77a TH |
338 | { |
339 | struct ata_link *pmp_link = ap->pmp_link; | |
d9027470 | 340 | int i, err; |
3af9a77a TH |
341 | |
342 | if (!pmp_link) { | |
343 | pmp_link = kzalloc(sizeof(pmp_link[0]) * SATA_PMP_MAX_PORTS, | |
344 | GFP_NOIO); | |
345 | if (!pmp_link) | |
346 | return -ENOMEM; | |
347 | ||
348 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) | |
349 | ata_link_init(ap, &pmp_link[i], i); | |
350 | ||
351 | ap->pmp_link = pmp_link; | |
d9027470 GG |
352 | |
353 | for (i = 0; i < SATA_PMP_MAX_PORTS; i++) { | |
354 | err = ata_tlink_add(&pmp_link[i]); | |
355 | if (err) { | |
356 | goto err_tlink; | |
357 | } | |
358 | } | |
3af9a77a TH |
359 | } |
360 | ||
361 | for (i = 0; i < nr_ports; i++) { | |
362 | struct ata_link *link = &pmp_link[i]; | |
363 | struct ata_eh_context *ehc = &link->eh_context; | |
364 | ||
365 | link->flags = 0; | |
b558eddd | 366 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
cf480626 | 367 | ehc->i.action |= ATA_EH_RESET; |
3af9a77a TH |
368 | } |
369 | ||
370 | return 0; | |
d9027470 GG |
371 | err_tlink: |
372 | while (--i >= 0) | |
373 | ata_tlink_delete(&pmp_link[i]); | |
374 | kfree(pmp_link); | |
375 | ap->pmp_link = NULL; | |
376 | return err; | |
3af9a77a TH |
377 | } |
378 | ||
379 | static void sata_pmp_quirks(struct ata_port *ap) | |
380 | { | |
381 | u32 *gscr = ap->link.device->gscr; | |
382 | u16 vendor = sata_pmp_gscr_vendor(gscr); | |
383 | u16 devid = sata_pmp_gscr_devid(gscr); | |
384 | struct ata_link *link; | |
385 | ||
8ffff94d TS |
386 | if (vendor == 0x1095 && (devid == 0x3726 || devid == 0x3826)) { |
387 | /* sil3x26 quirks */ | |
1eca4365 | 388 | ata_for_each_link(link, ap, EDGE) { |
6c8ea89c TH |
389 | /* link reports offline after LPM */ |
390 | link->flags |= ATA_LFLAG_NO_LPM; | |
391 | ||
7a87718d TH |
392 | /* |
393 | * Class code report is unreliable and SRST times | |
394 | * out under certain configurations. | |
395 | */ | |
3af9a77a | 396 | if (link->pmp < 5) |
7a87718d TH |
397 | link->flags |= ATA_LFLAG_NO_SRST | |
398 | ATA_LFLAG_ASSUME_ATA; | |
3af9a77a TH |
399 | |
400 | /* port 5 is for SEMB device and it doesn't like SRST */ | |
401 | if (link->pmp == 5) | |
402 | link->flags |= ATA_LFLAG_NO_SRST | | |
403 | ATA_LFLAG_ASSUME_SEMB; | |
404 | } | |
405 | } else if (vendor == 0x1095 && devid == 0x4723) { | |
7a87718d TH |
406 | /* |
407 | * sil4723 quirks | |
408 | * | |
409 | * Link reports offline after LPM. Class code report is | |
410 | * unreliable. SIMG PMPs never got SRST reliable and the | |
411 | * config device at port 2 locks up on SRST. | |
412 | */ | |
413 | ata_for_each_link(link, ap, EDGE) | |
414 | link->flags |= ATA_LFLAG_NO_LPM | | |
415 | ATA_LFLAG_NO_SRST | | |
416 | ATA_LFLAG_ASSUME_ATA; | |
3af9a77a TH |
417 | } else if (vendor == 0x1095 && devid == 0x4726) { |
418 | /* sil4726 quirks */ | |
1eca4365 | 419 | ata_for_each_link(link, ap, EDGE) { |
6c8ea89c TH |
420 | /* link reports offline after LPM */ |
421 | link->flags |= ATA_LFLAG_NO_LPM; | |
422 | ||
8048307d TH |
423 | /* Class code report is unreliable and SRST |
424 | * times out under certain configurations. | |
425 | * Config device can be at port 0 or 5 and | |
426 | * locks up on SRST. | |
3af9a77a | 427 | */ |
8048307d | 428 | if (link->pmp <= 5) |
3af9a77a TH |
429 | link->flags |= ATA_LFLAG_NO_SRST | |
430 | ATA_LFLAG_ASSUME_ATA; | |
431 | ||
432 | /* Port 6 is for SEMB device which doesn't | |
433 | * like SRST either. | |
434 | */ | |
435 | if (link->pmp == 6) | |
436 | link->flags |= ATA_LFLAG_NO_SRST | | |
437 | ATA_LFLAG_ASSUME_SEMB; | |
438 | } | |
439 | } else if (vendor == 0x1095 && (devid == 0x5723 || devid == 0x5733 || | |
440 | devid == 0x5734 || devid == 0x5744)) { | |
441 | /* sil5723/5744 quirks */ | |
442 | ||
443 | /* sil5723/5744 has either two or three downstream | |
444 | * ports depending on operation mode. The last port | |
445 | * is empty if any actual IO device is available or | |
446 | * occupied by a pseudo configuration device | |
447 | * otherwise. Don't try hard to recover it. | |
448 | */ | |
449 | ap->pmp_link[ap->nr_pmp_links - 1].flags |= ATA_LFLAG_NO_RETRY; | |
efb9e0f4 DL |
450 | } else if (vendor == 0x197b && (devid == 0x2352 || devid == 0x0325)) { |
451 | /* | |
452 | * 0x2352: found in Thermaltake BlackX Duet, jmicron JMB350? | |
453 | * 0x0325: jmicron JMB394. | |
454 | */ | |
0afc6f5b PH |
455 | ata_for_each_link(link, ap, EDGE) { |
456 | /* SRST breaks detection and disks get misclassified | |
457 | * LPM disabled to avoid potential problems | |
458 | */ | |
459 | link->flags |= ATA_LFLAG_NO_LPM | | |
460 | ATA_LFLAG_NO_SRST | | |
461 | ATA_LFLAG_ASSUME_ATA; | |
462 | } | |
3af9a77a TH |
463 | } |
464 | } | |
465 | ||
466 | /** | |
467 | * sata_pmp_attach - attach a SATA PMP device | |
468 | * @dev: SATA PMP device to attach | |
469 | * | |
470 | * Configure and attach SATA PMP device @dev. This function is | |
471 | * also responsible for allocating and initializing PMP links. | |
472 | * | |
473 | * LOCKING: | |
474 | * Kernel thread context (may sleep). | |
475 | * | |
476 | * RETURNS: | |
477 | * 0 on success, -errno on failure. | |
478 | */ | |
479 | int sata_pmp_attach(struct ata_device *dev) | |
480 | { | |
481 | struct ata_link *link = dev->link; | |
482 | struct ata_port *ap = link->ap; | |
483 | unsigned long flags; | |
484 | struct ata_link *tlink; | |
485 | int rc; | |
486 | ||
487 | /* is it hanging off the right place? */ | |
071f44b1 | 488 | if (!sata_pmp_supported(ap)) { |
a9a79dfe | 489 | ata_dev_err(dev, "host does not support Port Multiplier\n"); |
3af9a77a TH |
490 | return -EINVAL; |
491 | } | |
492 | ||
493 | if (!ata_is_host_link(link)) { | |
a9a79dfe | 494 | ata_dev_err(dev, "Port Multipliers cannot be nested\n"); |
3af9a77a TH |
495 | return -EINVAL; |
496 | } | |
497 | ||
498 | if (dev->devno) { | |
a9a79dfe | 499 | ata_dev_err(dev, "Port Multiplier must be the first device\n"); |
3af9a77a TH |
500 | return -EINVAL; |
501 | } | |
502 | ||
503 | WARN_ON(link->pmp != 0); | |
504 | link->pmp = SATA_PMP_CTRL_PORT; | |
505 | ||
506 | /* read GSCR block */ | |
507 | rc = sata_pmp_read_gscr(dev, dev->gscr); | |
508 | if (rc) | |
509 | goto fail; | |
510 | ||
511 | /* config PMP */ | |
512 | rc = sata_pmp_configure(dev, 1); | |
513 | if (rc) | |
514 | goto fail; | |
515 | ||
516 | rc = sata_pmp_init_links(ap, sata_pmp_gscr_ports(dev->gscr)); | |
517 | if (rc) { | |
a9a79dfe | 518 | ata_dev_info(dev, "failed to initialize PMP links\n"); |
3af9a77a TH |
519 | goto fail; |
520 | } | |
521 | ||
522 | /* attach it */ | |
523 | spin_lock_irqsave(ap->lock, flags); | |
524 | WARN_ON(ap->nr_pmp_links); | |
525 | ap->nr_pmp_links = sata_pmp_gscr_ports(dev->gscr); | |
526 | spin_unlock_irqrestore(ap->lock, flags); | |
527 | ||
528 | sata_pmp_quirks(ap); | |
529 | ||
530 | if (ap->ops->pmp_attach) | |
531 | ap->ops->pmp_attach(ap); | |
532 | ||
1eca4365 | 533 | ata_for_each_link(tlink, ap, EDGE) |
3af9a77a TH |
534 | sata_link_init_spd(tlink); |
535 | ||
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); | |
575 | } | |
576 | ||
577 | /** | |
578 | * sata_pmp_same_pmp - does new GSCR matches the configured PMP? | |
579 | * @dev: PMP device to compare against | |
580 | * @new_gscr: GSCR block of the new device | |
581 | * | |
582 | * Compare @new_gscr against @dev and determine whether @dev is | |
583 | * the PMP described by @new_gscr. | |
584 | * | |
585 | * LOCKING: | |
586 | * None. | |
587 | * | |
588 | * RETURNS: | |
589 | * 1 if @dev matches @new_gscr, 0 otherwise. | |
590 | */ | |
591 | static int sata_pmp_same_pmp(struct ata_device *dev, const u32 *new_gscr) | |
592 | { | |
593 | const u32 *old_gscr = dev->gscr; | |
594 | u16 old_vendor, new_vendor, old_devid, new_devid; | |
595 | int old_nr_ports, new_nr_ports; | |
596 | ||
597 | old_vendor = sata_pmp_gscr_vendor(old_gscr); | |
598 | new_vendor = sata_pmp_gscr_vendor(new_gscr); | |
599 | old_devid = sata_pmp_gscr_devid(old_gscr); | |
600 | new_devid = sata_pmp_gscr_devid(new_gscr); | |
601 | old_nr_ports = sata_pmp_gscr_ports(old_gscr); | |
602 | new_nr_ports = sata_pmp_gscr_ports(new_gscr); | |
603 | ||
604 | if (old_vendor != new_vendor) { | |
a9a79dfe JP |
605 | ata_dev_info(dev, |
606 | "Port Multiplier vendor mismatch '0x%x' != '0x%x'\n", | |
607 | old_vendor, new_vendor); | |
3af9a77a TH |
608 | return 0; |
609 | } | |
610 | ||
611 | if (old_devid != new_devid) { | |
a9a79dfe JP |
612 | ata_dev_info(dev, |
613 | "Port Multiplier device ID mismatch '0x%x' != '0x%x'\n", | |
614 | old_devid, new_devid); | |
3af9a77a TH |
615 | return 0; |
616 | } | |
617 | ||
618 | if (old_nr_ports != new_nr_ports) { | |
a9a79dfe JP |
619 | ata_dev_info(dev, |
620 | "Port Multiplier nr_ports mismatch '0x%x' != '0x%x'\n", | |
621 | old_nr_ports, new_nr_ports); | |
3af9a77a TH |
622 | return 0; |
623 | } | |
624 | ||
625 | return 1; | |
626 | } | |
627 | ||
628 | /** | |
629 | * sata_pmp_revalidate - revalidate SATA PMP | |
630 | * @dev: PMP device to revalidate | |
631 | * @new_class: new class code | |
632 | * | |
633 | * Re-read GSCR block and make sure @dev is still attached to the | |
634 | * port and properly configured. | |
635 | * | |
636 | * LOCKING: | |
637 | * Kernel thread context (may sleep). | |
638 | * | |
639 | * RETURNS: | |
640 | * 0 on success, -errno otherwise. | |
641 | */ | |
642 | static int sata_pmp_revalidate(struct ata_device *dev, unsigned int new_class) | |
643 | { | |
644 | struct ata_link *link = dev->link; | |
645 | struct ata_port *ap = link->ap; | |
646 | u32 *gscr = (void *)ap->sector_buf; | |
647 | int rc; | |
648 | ||
649 | DPRINTK("ENTER\n"); | |
650 | ||
651 | ata_eh_about_to_do(link, NULL, ATA_EH_REVALIDATE); | |
652 | ||
653 | if (!ata_dev_enabled(dev)) { | |
654 | rc = -ENODEV; | |
655 | goto fail; | |
656 | } | |
657 | ||
658 | /* wrong class? */ | |
659 | if (ata_class_enabled(new_class) && new_class != ATA_DEV_PMP) { | |
660 | rc = -ENODEV; | |
661 | goto fail; | |
662 | } | |
663 | ||
664 | /* read GSCR */ | |
665 | rc = sata_pmp_read_gscr(dev, gscr); | |
666 | if (rc) | |
667 | goto fail; | |
668 | ||
669 | /* is the pmp still there? */ | |
670 | if (!sata_pmp_same_pmp(dev, gscr)) { | |
671 | rc = -ENODEV; | |
672 | goto fail; | |
673 | } | |
674 | ||
675 | memcpy(dev->gscr, gscr, sizeof(gscr[0]) * SATA_PMP_GSCR_DWORDS); | |
676 | ||
677 | rc = sata_pmp_configure(dev, 0); | |
678 | if (rc) | |
679 | goto fail; | |
680 | ||
681 | ata_eh_done(link, NULL, ATA_EH_REVALIDATE); | |
682 | ||
683 | DPRINTK("EXIT, rc=0\n"); | |
684 | return 0; | |
685 | ||
686 | fail: | |
a9a79dfe | 687 | ata_dev_err(dev, "PMP revalidation failed (errno=%d)\n", rc); |
3af9a77a TH |
688 | DPRINTK("EXIT, rc=%d\n", rc); |
689 | return rc; | |
690 | } | |
691 | ||
692 | /** | |
693 | * sata_pmp_revalidate_quick - revalidate SATA PMP quickly | |
694 | * @dev: PMP device to revalidate | |
695 | * | |
696 | * Make sure the attached PMP is accessible. | |
697 | * | |
698 | * LOCKING: | |
699 | * Kernel thread context (may sleep). | |
700 | * | |
701 | * RETURNS: | |
702 | * 0 on success, -errno otherwise. | |
703 | */ | |
704 | static int sata_pmp_revalidate_quick(struct ata_device *dev) | |
705 | { | |
b06ce3e5 | 706 | unsigned int err_mask; |
3af9a77a | 707 | u32 prod_id; |
3af9a77a | 708 | |
b06ce3e5 TH |
709 | err_mask = sata_pmp_read(dev->link, SATA_PMP_GSCR_PROD_ID, &prod_id); |
710 | if (err_mask) { | |
a9a79dfe JP |
711 | ata_dev_err(dev, |
712 | "failed to read PMP product ID (Emask=0x%x)\n", | |
713 | err_mask); | |
b06ce3e5 | 714 | return -EIO; |
3af9a77a TH |
715 | } |
716 | ||
717 | if (prod_id != dev->gscr[SATA_PMP_GSCR_PROD_ID]) { | |
a9a79dfe | 718 | ata_dev_err(dev, "PMP product ID mismatch\n"); |
3af9a77a TH |
719 | /* something weird is going on, request full PMP recovery */ |
720 | return -EIO; | |
721 | } | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
726 | /** | |
727 | * sata_pmp_eh_recover_pmp - recover PMP | |
728 | * @ap: ATA port PMP is attached to | |
729 | * @prereset: prereset method (can be NULL) | |
730 | * @softreset: softreset method | |
731 | * @hardreset: hardreset method | |
732 | * @postreset: postreset method (can be NULL) | |
733 | * | |
734 | * Recover PMP attached to @ap. Recovery procedure is somewhat | |
735 | * similar to that of ata_eh_recover() except that reset should | |
736 | * always be performed in hard->soft sequence and recovery | |
737 | * failure results in PMP detachment. | |
738 | * | |
739 | * LOCKING: | |
740 | * Kernel thread context (may sleep). | |
741 | * | |
742 | * RETURNS: | |
743 | * 0 on success, -errno on failure. | |
744 | */ | |
745 | static int sata_pmp_eh_recover_pmp(struct ata_port *ap, | |
746 | ata_prereset_fn_t prereset, ata_reset_fn_t softreset, | |
747 | ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) | |
748 | { | |
749 | struct ata_link *link = &ap->link; | |
750 | struct ata_eh_context *ehc = &link->eh_context; | |
751 | struct ata_device *dev = link->device; | |
752 | int tries = ATA_EH_PMP_TRIES; | |
753 | int detach = 0, rc = 0; | |
754 | int reval_failed = 0; | |
755 | ||
756 | DPRINTK("ENTER\n"); | |
757 | ||
758 | if (dev->flags & ATA_DFLAG_DETACH) { | |
759 | detach = 1; | |
760 | goto fail; | |
761 | } | |
762 | ||
763 | retry: | |
764 | ehc->classes[0] = ATA_DEV_UNKNOWN; | |
765 | ||
cf480626 | 766 | if (ehc->i.action & ATA_EH_RESET) { |
3af9a77a TH |
767 | struct ata_link *tlink; |
768 | ||
3af9a77a | 769 | /* reset */ |
3af9a77a TH |
770 | rc = ata_eh_reset(link, 0, prereset, softreset, hardreset, |
771 | postreset); | |
772 | if (rc) { | |
a9a79dfe | 773 | ata_link_err(link, "failed to reset PMP, giving up\n"); |
3af9a77a TH |
774 | goto fail; |
775 | } | |
776 | ||
3af9a77a | 777 | /* PMP is reset, SErrors cannot be trusted, scan all */ |
1eca4365 | 778 | ata_for_each_link(tlink, ap, EDGE) { |
b558eddd TH |
779 | struct ata_eh_context *ehc = &tlink->eh_context; |
780 | ||
781 | ehc->i.probe_mask |= ATA_ALL_DEVICES; | |
782 | ehc->i.action |= ATA_EH_RESET; | |
783 | } | |
3af9a77a TH |
784 | } |
785 | ||
786 | /* If revalidation is requested, revalidate and reconfigure; | |
787 | * otherwise, do quick revalidation. | |
788 | */ | |
789 | if (ehc->i.action & ATA_EH_REVALIDATE) | |
790 | rc = sata_pmp_revalidate(dev, ehc->classes[0]); | |
791 | else | |
792 | rc = sata_pmp_revalidate_quick(dev); | |
793 | ||
794 | if (rc) { | |
795 | tries--; | |
796 | ||
797 | if (rc == -ENODEV) { | |
b558eddd | 798 | ehc->i.probe_mask |= ATA_ALL_DEVICES; |
3af9a77a TH |
799 | detach = 1; |
800 | /* give it just two more chances */ | |
801 | tries = min(tries, 2); | |
802 | } | |
803 | ||
804 | if (tries) { | |
3af9a77a TH |
805 | /* consecutive revalidation failures? speed down */ |
806 | if (reval_failed) | |
a07d499b | 807 | sata_down_spd_limit(link, 0); |
3af9a77a TH |
808 | else |
809 | reval_failed = 1; | |
810 | ||
cf480626 | 811 | ehc->i.action |= ATA_EH_RESET; |
3af9a77a TH |
812 | goto retry; |
813 | } else { | |
a9a79dfe JP |
814 | ata_dev_err(dev, |
815 | "failed to recover PMP after %d tries, giving up\n", | |
816 | ATA_EH_PMP_TRIES); | |
3af9a77a TH |
817 | goto fail; |
818 | } | |
819 | } | |
820 | ||
821 | /* okay, PMP resurrected */ | |
822 | ehc->i.flags = 0; | |
823 | ||
824 | DPRINTK("EXIT, rc=0\n"); | |
825 | return 0; | |
826 | ||
827 | fail: | |
828 | sata_pmp_detach(dev); | |
829 | if (detach) | |
830 | ata_eh_detach_dev(dev); | |
831 | else | |
832 | ata_dev_disable(dev); | |
833 | ||
834 | DPRINTK("EXIT, rc=%d\n", rc); | |
835 | return rc; | |
836 | } | |
837 | ||
838 | static int sata_pmp_eh_handle_disabled_links(struct ata_port *ap) | |
839 | { | |
840 | struct ata_link *link; | |
841 | unsigned long flags; | |
842 | int rc; | |
843 | ||
844 | spin_lock_irqsave(ap->lock, flags); | |
845 | ||
1eca4365 | 846 | ata_for_each_link(link, ap, EDGE) { |
3af9a77a TH |
847 | if (!(link->flags & ATA_LFLAG_DISABLED)) |
848 | continue; | |
849 | ||
850 | spin_unlock_irqrestore(ap->lock, flags); | |
851 | ||
852 | /* Some PMPs require hardreset sequence to get | |
853 | * SError.N working. | |
854 | */ | |
cf480626 | 855 | sata_link_hardreset(link, sata_deb_timing_normal, |
341c2c95 TH |
856 | ata_deadline(jiffies, ATA_TMOUT_INTERNAL_QUICK), |
857 | NULL, NULL); | |
3af9a77a TH |
858 | |
859 | /* unconditionally clear SError.N */ | |
860 | rc = sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG); | |
861 | if (rc) { | |
a9a79dfe JP |
862 | ata_link_err(link, |
863 | "failed to clear SError.N (errno=%d)\n", | |
864 | rc); | |
3af9a77a TH |
865 | return rc; |
866 | } | |
867 | ||
868 | spin_lock_irqsave(ap->lock, flags); | |
869 | } | |
870 | ||
871 | spin_unlock_irqrestore(ap->lock, flags); | |
872 | ||
873 | return 0; | |
874 | } | |
875 | ||
876 | static int sata_pmp_handle_link_fail(struct ata_link *link, int *link_tries) | |
877 | { | |
878 | struct ata_port *ap = link->ap; | |
879 | unsigned long flags; | |
880 | ||
881 | if (link_tries[link->pmp] && --link_tries[link->pmp]) | |
882 | return 1; | |
883 | ||
884 | /* disable this link */ | |
885 | if (!(link->flags & ATA_LFLAG_DISABLED)) { | |
a9a79dfe | 886 | ata_link_warn(link, |
3af9a77a TH |
887 | "failed to recover link after %d tries, disabling\n", |
888 | ATA_EH_PMP_LINK_TRIES); | |
889 | ||
890 | spin_lock_irqsave(ap->lock, flags); | |
891 | link->flags |= ATA_LFLAG_DISABLED; | |
892 | spin_unlock_irqrestore(ap->lock, flags); | |
893 | } | |
894 | ||
895 | ata_dev_disable(link->device); | |
896 | link->eh_context.i.action = 0; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
901 | /** | |
902 | * sata_pmp_eh_recover - recover PMP-enabled port | |
903 | * @ap: ATA port to recover | |
3af9a77a TH |
904 | * |
905 | * Drive EH recovery operation for PMP enabled port @ap. This | |
906 | * function recovers host and PMP ports with proper retrials and | |
907 | * fallbacks. Actual recovery operations are performed using | |
908 | * ata_eh_recover() and sata_pmp_eh_recover_pmp(). | |
909 | * | |
910 | * LOCKING: | |
911 | * Kernel thread context (may sleep). | |
912 | * | |
913 | * RETURNS: | |
914 | * 0 on success, -errno on failure. | |
915 | */ | |
a1efdaba | 916 | static int sata_pmp_eh_recover(struct ata_port *ap) |
3af9a77a | 917 | { |
a1efdaba | 918 | struct ata_port_operations *ops = ap->ops; |
3af9a77a TH |
919 | int pmp_tries, link_tries[SATA_PMP_MAX_PORTS]; |
920 | struct ata_link *pmp_link = &ap->link; | |
921 | struct ata_device *pmp_dev = pmp_link->device; | |
922 | struct ata_eh_context *pmp_ehc = &pmp_link->eh_context; | |
f1bbfb90 | 923 | u32 *gscr = pmp_dev->gscr; |
3af9a77a TH |
924 | struct ata_link *link; |
925 | struct ata_device *dev; | |
b06ce3e5 | 926 | unsigned int err_mask; |
3af9a77a TH |
927 | u32 gscr_error, sntf; |
928 | int cnt, rc; | |
929 | ||
930 | pmp_tries = ATA_EH_PMP_TRIES; | |
1eca4365 | 931 | ata_for_each_link(link, ap, EDGE) |
3af9a77a TH |
932 | link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES; |
933 | ||
934 | retry: | |
935 | /* PMP attached? */ | |
071f44b1 | 936 | if (!sata_pmp_attached(ap)) { |
a1efdaba TH |
937 | rc = ata_eh_recover(ap, ops->prereset, ops->softreset, |
938 | ops->hardreset, ops->postreset, NULL); | |
3af9a77a | 939 | if (rc) { |
1eca4365 | 940 | ata_for_each_dev(dev, &ap->link, ALL) |
3af9a77a TH |
941 | ata_dev_disable(dev); |
942 | return rc; | |
943 | } | |
944 | ||
945 | if (pmp_dev->class != ATA_DEV_PMP) | |
946 | return 0; | |
947 | ||
948 | /* new PMP online */ | |
1eca4365 | 949 | ata_for_each_link(link, ap, EDGE) |
3af9a77a TH |
950 | link_tries[link->pmp] = ATA_EH_PMP_LINK_TRIES; |
951 | ||
952 | /* fall through */ | |
953 | } | |
954 | ||
955 | /* recover pmp */ | |
a1efdaba TH |
956 | rc = sata_pmp_eh_recover_pmp(ap, ops->prereset, ops->softreset, |
957 | ops->hardreset, ops->postreset); | |
3af9a77a TH |
958 | if (rc) |
959 | goto pmp_fail; | |
960 | ||
f1bbfb90 TH |
961 | /* PHY event notification can disturb reset and other recovery |
962 | * operations. Turn it off. | |
963 | */ | |
964 | if (gscr[SATA_PMP_GSCR_FEAT_EN] & SATA_PMP_FEAT_NOTIFY) { | |
965 | gscr[SATA_PMP_GSCR_FEAT_EN] &= ~SATA_PMP_FEAT_NOTIFY; | |
966 | ||
967 | err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN, | |
968 | gscr[SATA_PMP_GSCR_FEAT_EN]); | |
969 | if (err_mask) { | |
a9a79dfe | 970 | ata_link_warn(pmp_link, |
f1bbfb90 TH |
971 | "failed to disable NOTIFY (err_mask=0x%x)\n", |
972 | err_mask); | |
973 | goto pmp_fail; | |
974 | } | |
975 | } | |
976 | ||
3af9a77a TH |
977 | /* handle disabled links */ |
978 | rc = sata_pmp_eh_handle_disabled_links(ap); | |
979 | if (rc) | |
980 | goto pmp_fail; | |
981 | ||
982 | /* recover links */ | |
a1efdaba TH |
983 | rc = ata_eh_recover(ap, ops->pmp_prereset, ops->pmp_softreset, |
984 | ops->pmp_hardreset, ops->pmp_postreset, &link); | |
3af9a77a TH |
985 | if (rc) |
986 | goto link_fail; | |
987 | ||
3af9a77a TH |
988 | /* clear SNotification */ |
989 | rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf); | |
990 | if (rc == 0) | |
991 | sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf); | |
992 | ||
6c8ea89c TH |
993 | /* |
994 | * If LPM is active on any fan-out port, hotplug wouldn't | |
995 | * work. Return w/ PHY event notification disabled. | |
996 | */ | |
997 | ata_for_each_link(link, ap, EDGE) | |
998 | if (link->lpm_policy > ATA_LPM_MAX_POWER) | |
999 | return 0; | |
1000 | ||
1001 | /* | |
1002 | * Connection status might have changed while resetting other | |
1003 | * links, enable notification and check SATA_PMP_GSCR_ERROR | |
1004 | * before returning. | |
1005 | */ | |
1006 | ||
3af9a77a TH |
1007 | /* enable notification */ |
1008 | if (pmp_dev->flags & ATA_DFLAG_AN) { | |
f1bbfb90 | 1009 | gscr[SATA_PMP_GSCR_FEAT_EN] |= SATA_PMP_FEAT_NOTIFY; |
3af9a77a | 1010 | |
f1bbfb90 TH |
1011 | err_mask = sata_pmp_write(pmp_link, SATA_PMP_GSCR_FEAT_EN, |
1012 | gscr[SATA_PMP_GSCR_FEAT_EN]); | |
b06ce3e5 | 1013 | if (err_mask) { |
a9a79dfe JP |
1014 | ata_dev_err(pmp_dev, |
1015 | "failed to write PMP_FEAT_EN (Emask=0x%x)\n", | |
1016 | err_mask); | |
b06ce3e5 | 1017 | rc = -EIO; |
3af9a77a TH |
1018 | goto pmp_fail; |
1019 | } | |
1020 | } | |
1021 | ||
1022 | /* check GSCR_ERROR */ | |
b06ce3e5 TH |
1023 | err_mask = sata_pmp_read(pmp_link, SATA_PMP_GSCR_ERROR, &gscr_error); |
1024 | if (err_mask) { | |
a9a79dfe JP |
1025 | ata_dev_err(pmp_dev, |
1026 | "failed to read PMP_GSCR_ERROR (Emask=0x%x)\n", | |
1027 | err_mask); | |
b06ce3e5 | 1028 | rc = -EIO; |
3af9a77a TH |
1029 | goto pmp_fail; |
1030 | } | |
1031 | ||
1032 | cnt = 0; | |
1eca4365 | 1033 | ata_for_each_link(link, ap, EDGE) { |
3af9a77a TH |
1034 | if (!(gscr_error & (1 << link->pmp))) |
1035 | continue; | |
1036 | ||
1037 | if (sata_pmp_handle_link_fail(link, link_tries)) { | |
1038 | ata_ehi_hotplugged(&link->eh_context.i); | |
1039 | cnt++; | |
1040 | } else { | |
a9a79dfe JP |
1041 | ata_link_warn(link, |
1042 | "PHY status changed but maxed out on retries, giving up\n"); | |
1043 | ata_link_warn(link, | |
1044 | "Manually issue scan to resume this link\n"); | |
3af9a77a TH |
1045 | } |
1046 | } | |
1047 | ||
1048 | if (cnt) { | |
a9a79dfe JP |
1049 | ata_port_info(ap, |
1050 | "PMP SError.N set for some ports, repeating recovery\n"); | |
3af9a77a TH |
1051 | goto retry; |
1052 | } | |
1053 | ||
1054 | return 0; | |
1055 | ||
1056 | link_fail: | |
1057 | if (sata_pmp_handle_link_fail(link, link_tries)) { | |
cf480626 | 1058 | pmp_ehc->i.action |= ATA_EH_RESET; |
3af9a77a TH |
1059 | goto retry; |
1060 | } | |
1061 | ||
1062 | /* fall through */ | |
1063 | pmp_fail: | |
1064 | /* Control always ends up here after detaching PMP. Shut up | |
1065 | * and return if we're unloading. | |
1066 | */ | |
1067 | if (ap->pflags & ATA_PFLAG_UNLOADING) | |
1068 | return rc; | |
1069 | ||
071f44b1 | 1070 | if (!sata_pmp_attached(ap)) |
3af9a77a TH |
1071 | goto retry; |
1072 | ||
1073 | if (--pmp_tries) { | |
cf480626 | 1074 | pmp_ehc->i.action |= ATA_EH_RESET; |
3af9a77a TH |
1075 | goto retry; |
1076 | } | |
1077 | ||
a9a79dfe JP |
1078 | ata_port_err(ap, "failed to recover PMP after %d tries, giving up\n", |
1079 | ATA_EH_PMP_TRIES); | |
3af9a77a TH |
1080 | sata_pmp_detach(pmp_dev); |
1081 | ata_dev_disable(pmp_dev); | |
1082 | ||
1083 | return rc; | |
1084 | } | |
1085 | ||
1086 | /** | |
a1efdaba | 1087 | * sata_pmp_error_handler - do standard error handling for PMP-enabled host |
3af9a77a | 1088 | * @ap: host port to handle error for |
3af9a77a TH |
1089 | * |
1090 | * Perform standard error handling sequence for PMP-enabled host | |
1091 | * @ap. | |
1092 | * | |
1093 | * LOCKING: | |
1094 | * Kernel thread context (may sleep). | |
1095 | */ | |
a1efdaba | 1096 | void sata_pmp_error_handler(struct ata_port *ap) |
3af9a77a TH |
1097 | { |
1098 | ata_eh_autopsy(ap); | |
1099 | ata_eh_report(ap); | |
a1efdaba | 1100 | sata_pmp_eh_recover(ap); |
3af9a77a TH |
1101 | ata_eh_finish(ap); |
1102 | } | |
48515f6c TH |
1103 | |
1104 | EXPORT_SYMBOL_GPL(sata_pmp_port_ops); | |
1105 | EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); | |
1106 | EXPORT_SYMBOL_GPL(sata_pmp_error_handler); |