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Linux 4.9.74
[linux/fpc-iii.git] / drivers / ata / libahci.c
blob0d028ead99e85b632d1802af0f438287bc5a7c54
1 /*
2 * libahci.c - Common AHCI SATA low-level routines
3 *
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2004-2005 Red Hat, Inc.
9 *
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 *
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
28 *
29 * AHCI hardware documentation:
30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
32 *
33 */
34
35 #include <linux/kernel.h>
36 #include <linux/gfp.h>
37 #include <linux/module.h>
38 #include <linux/blkdev.h>
39 #include <linux/delay.h>
40 #include <linux/interrupt.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/device.h>
43 #include <scsi/scsi_host.h>
44 #include <scsi/scsi_cmnd.h>
45 #include <linux/libata.h>
46 #include <linux/pci.h>
47 #include "ahci.h"
48 #include "libata.h"
49
50 static int ahci_skip_host_reset;
51 int ahci_ignore_sss;
52 EXPORT_SYMBOL_GPL(ahci_ignore_sss);
53
54 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444);
55 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)");
56
57 module_param_named(ignore_sss, ahci_ignore_sss, int, 0444);
58 MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)");
59
60 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
61 unsigned hints);
62 static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
63 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
64 size_t size);
65 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
66 ssize_t size);
67
68
69
70 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
71 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
72 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
73 static int ahci_port_start(struct ata_port *ap);
74 static void ahci_port_stop(struct ata_port *ap);
75 static void ahci_qc_prep(struct ata_queued_cmd *qc);
76 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc);
77 static void ahci_freeze(struct ata_port *ap);
78 static void ahci_thaw(struct ata_port *ap);
79 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep);
80 static void ahci_enable_fbs(struct ata_port *ap);
81 static void ahci_disable_fbs(struct ata_port *ap);
82 static void ahci_pmp_attach(struct ata_port *ap);
83 static void ahci_pmp_detach(struct ata_port *ap);
84 static int ahci_softreset(struct ata_link *link, unsigned int *class,
85 unsigned long deadline);
86 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
87 unsigned long deadline);
88 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
89 unsigned long deadline);
90 static void ahci_postreset(struct ata_link *link, unsigned int *class);
91 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
92 static void ahci_dev_config(struct ata_device *dev);
93 #ifdef CONFIG_PM
94 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
95 #endif
96 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
97 static ssize_t ahci_activity_store(struct ata_device *dev,
98 enum sw_activity val);
99 static void ahci_init_sw_activity(struct ata_link *link);
100
101 static ssize_t ahci_show_host_caps(struct device *dev,
102 struct device_attribute *attr, char *buf);
103 static ssize_t ahci_show_host_cap2(struct device *dev,
104 struct device_attribute *attr, char *buf);
105 static ssize_t ahci_show_host_version(struct device *dev,
106 struct device_attribute *attr, char *buf);
107 static ssize_t ahci_show_port_cmd(struct device *dev,
108 struct device_attribute *attr, char *buf);
109 static ssize_t ahci_read_em_buffer(struct device *dev,
110 struct device_attribute *attr, char *buf);
111 static ssize_t ahci_store_em_buffer(struct device *dev,
112 struct device_attribute *attr,
113 const char *buf, size_t size);
114 static ssize_t ahci_show_em_supported(struct device *dev,
115 struct device_attribute *attr, char *buf);
116 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance);
117
118 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL);
119 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL);
120 static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL);
121 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL);
122 static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO,
123 ahci_read_em_buffer, ahci_store_em_buffer);
124 static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL);
125
126 struct device_attribute *ahci_shost_attrs[] = {
127 &dev_attr_link_power_management_policy,
128 &dev_attr_em_message_type,
129 &dev_attr_em_message,
130 &dev_attr_ahci_host_caps,
131 &dev_attr_ahci_host_cap2,
132 &dev_attr_ahci_host_version,
133 &dev_attr_ahci_port_cmd,
134 &dev_attr_em_buffer,
135 &dev_attr_em_message_supported,
136 NULL
137 };
138 EXPORT_SYMBOL_GPL(ahci_shost_attrs);
139
140 struct device_attribute *ahci_sdev_attrs[] = {
141 &dev_attr_sw_activity,
142 &dev_attr_unload_heads,
143 NULL
144 };
145 EXPORT_SYMBOL_GPL(ahci_sdev_attrs);
146
147 struct ata_port_operations ahci_ops = {
148 .inherits = &sata_pmp_port_ops,
149
150 .qc_defer = ahci_pmp_qc_defer,
151 .qc_prep = ahci_qc_prep,
152 .qc_issue = ahci_qc_issue,
153 .qc_fill_rtf = ahci_qc_fill_rtf,
154
155 .freeze = ahci_freeze,
156 .thaw = ahci_thaw,
157 .softreset = ahci_softreset,
158 .hardreset = ahci_hardreset,
159 .postreset = ahci_postreset,
160 .pmp_softreset = ahci_softreset,
161 .error_handler = ahci_error_handler,
162 .post_internal_cmd = ahci_post_internal_cmd,
163 .dev_config = ahci_dev_config,
164
165 .scr_read = ahci_scr_read,
166 .scr_write = ahci_scr_write,
167 .pmp_attach = ahci_pmp_attach,
168 .pmp_detach = ahci_pmp_detach,
169
170 .set_lpm = ahci_set_lpm,
171 .em_show = ahci_led_show,
172 .em_store = ahci_led_store,
173 .sw_activity_show = ahci_activity_show,
174 .sw_activity_store = ahci_activity_store,
175 .transmit_led_message = ahci_transmit_led_message,
176 #ifdef CONFIG_PM
177 .port_suspend = ahci_port_suspend,
178 .port_resume = ahci_port_resume,
179 #endif
180 .port_start = ahci_port_start,
181 .port_stop = ahci_port_stop,
182 };
183 EXPORT_SYMBOL_GPL(ahci_ops);
184
185 struct ata_port_operations ahci_pmp_retry_srst_ops = {
186 .inherits = &ahci_ops,
187 .softreset = ahci_pmp_retry_softreset,
188 };
189 EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops);
190
191 static bool ahci_em_messages __read_mostly = true;
192 EXPORT_SYMBOL_GPL(ahci_em_messages);
193 module_param(ahci_em_messages, bool, 0444);
194 /* add other LED protocol types when they become supported */
195 MODULE_PARM_DESC(ahci_em_messages,
196 "AHCI Enclosure Management Message control (0 = off, 1 = on)");
197
198 /* device sleep idle timeout in ms */
199 static int devslp_idle_timeout __read_mostly = 1000;
200 module_param(devslp_idle_timeout, int, 0644);
201 MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout");
202
203 static void ahci_enable_ahci(void __iomem *mmio)
204 {
205 int i;
206 u32 tmp;
207
208 /* turn on AHCI_EN */
209 tmp = readl(mmio + HOST_CTL);
210 if (tmp & HOST_AHCI_EN)
211 return;
212
213 /* Some controllers need AHCI_EN to be written multiple times.
214 * Try a few times before giving up.
215 */
216 for (i = 0; i < 5; i++) {
217 tmp |= HOST_AHCI_EN;
218 writel(tmp, mmio + HOST_CTL);
219 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */
220 if (tmp & HOST_AHCI_EN)
221 return;
222 msleep(10);
223 }
224
225 WARN_ON(1);
226 }
227
228 /**
229 * ahci_rpm_get_port - Make sure the port is powered on
230 * @ap: Port to power on
231 *
232 * Whenever there is need to access the AHCI host registers outside of
233 * normal execution paths, call this function to make sure the host is
234 * actually powered on.
235 */
236 static int ahci_rpm_get_port(struct ata_port *ap)
237 {
238 return pm_runtime_get_sync(ap->dev);
239 }
240
241 /**
242 * ahci_rpm_put_port - Undoes ahci_rpm_get_port()
243 * @ap: Port to power down
244 *
245 * Undoes ahci_rpm_get_port() and possibly powers down the AHCI host
246 * if it has no more active users.
247 */
248 static void ahci_rpm_put_port(struct ata_port *ap)
249 {
250 pm_runtime_put(ap->dev);
251 }
252
253 static ssize_t ahci_show_host_caps(struct device *dev,
254 struct device_attribute *attr, char *buf)
255 {
256 struct Scsi_Host *shost = class_to_shost(dev);
257 struct ata_port *ap = ata_shost_to_port(shost);
258 struct ahci_host_priv *hpriv = ap->host->private_data;
259
260 return sprintf(buf, "%x\n", hpriv->cap);
261 }
262
263 static ssize_t ahci_show_host_cap2(struct device *dev,
264 struct device_attribute *attr, char *buf)
265 {
266 struct Scsi_Host *shost = class_to_shost(dev);
267 struct ata_port *ap = ata_shost_to_port(shost);
268 struct ahci_host_priv *hpriv = ap->host->private_data;
269
270 return sprintf(buf, "%x\n", hpriv->cap2);
271 }
272
273 static ssize_t ahci_show_host_version(struct device *dev,
274 struct device_attribute *attr, char *buf)
275 {
276 struct Scsi_Host *shost = class_to_shost(dev);
277 struct ata_port *ap = ata_shost_to_port(shost);
278 struct ahci_host_priv *hpriv = ap->host->private_data;
279
280 return sprintf(buf, "%x\n", hpriv->version);
281 }
282
283 static ssize_t ahci_show_port_cmd(struct device *dev,
284 struct device_attribute *attr, char *buf)
285 {
286 struct Scsi_Host *shost = class_to_shost(dev);
287 struct ata_port *ap = ata_shost_to_port(shost);
288 void __iomem *port_mmio = ahci_port_base(ap);
289 ssize_t ret;
290
291 ahci_rpm_get_port(ap);
292 ret = sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD));
293 ahci_rpm_put_port(ap);
294
295 return ret;
296 }
297
298 static ssize_t ahci_read_em_buffer(struct device *dev,
299 struct device_attribute *attr, char *buf)
300 {
301 struct Scsi_Host *shost = class_to_shost(dev);
302 struct ata_port *ap = ata_shost_to_port(shost);
303 struct ahci_host_priv *hpriv = ap->host->private_data;
304 void __iomem *mmio = hpriv->mmio;
305 void __iomem *em_mmio = mmio + hpriv->em_loc;
306 u32 em_ctl, msg;
307 unsigned long flags;
308 size_t count;
309 int i;
310
311 ahci_rpm_get_port(ap);
312 spin_lock_irqsave(ap->lock, flags);
313
314 em_ctl = readl(mmio + HOST_EM_CTL);
315 if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT ||
316 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) {
317 spin_unlock_irqrestore(ap->lock, flags);
318 ahci_rpm_put_port(ap);
319 return -EINVAL;
320 }
321
322 if (!(em_ctl & EM_CTL_MR)) {
323 spin_unlock_irqrestore(ap->lock, flags);
324 ahci_rpm_put_port(ap);
325 return -EAGAIN;
326 }
327
328 if (!(em_ctl & EM_CTL_SMB))
329 em_mmio += hpriv->em_buf_sz;
330
331 count = hpriv->em_buf_sz;
332
333 /* the count should not be larger than PAGE_SIZE */
334 if (count > PAGE_SIZE) {
335 if (printk_ratelimit())
336 ata_port_warn(ap,
337 "EM read buffer size too large: "
338 "buffer size %u, page size %lu\n",
339 hpriv->em_buf_sz, PAGE_SIZE);
340 count = PAGE_SIZE;
341 }
342
343 for (i = 0; i < count; i += 4) {
344 msg = readl(em_mmio + i);
345 buf[i] = msg & 0xff;
346 buf[i + 1] = (msg >> 8) & 0xff;
347 buf[i + 2] = (msg >> 16) & 0xff;
348 buf[i + 3] = (msg >> 24) & 0xff;
349 }
350
351 spin_unlock_irqrestore(ap->lock, flags);
352 ahci_rpm_put_port(ap);
353
354 return i;
355 }
356
357 static ssize_t ahci_store_em_buffer(struct device *dev,
358 struct device_attribute *attr,
359 const char *buf, size_t size)
360 {
361 struct Scsi_Host *shost = class_to_shost(dev);
362 struct ata_port *ap = ata_shost_to_port(shost);
363 struct ahci_host_priv *hpriv = ap->host->private_data;
364 void __iomem *mmio = hpriv->mmio;
365 void __iomem *em_mmio = mmio + hpriv->em_loc;
366 const unsigned char *msg_buf = buf;
367 u32 em_ctl, msg;
368 unsigned long flags;
369 int i;
370
371 /* check size validity */
372 if (!(ap->flags & ATA_FLAG_EM) ||
373 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) ||
374 size % 4 || size > hpriv->em_buf_sz)
375 return -EINVAL;
376
377 ahci_rpm_get_port(ap);
378 spin_lock_irqsave(ap->lock, flags);
379
380 em_ctl = readl(mmio + HOST_EM_CTL);
381 if (em_ctl & EM_CTL_TM) {
382 spin_unlock_irqrestore(ap->lock, flags);
383 ahci_rpm_put_port(ap);
384 return -EBUSY;
385 }
386
387 for (i = 0; i < size; i += 4) {
388 msg = msg_buf[i] | msg_buf[i + 1] << 8 |
389 msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24;
390 writel(msg, em_mmio + i);
391 }
392
393 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
394
395 spin_unlock_irqrestore(ap->lock, flags);
396 ahci_rpm_put_port(ap);
397
398 return size;
399 }
400
401 static ssize_t ahci_show_em_supported(struct device *dev,
402 struct device_attribute *attr, char *buf)
403 {
404 struct Scsi_Host *shost = class_to_shost(dev);
405 struct ata_port *ap = ata_shost_to_port(shost);
406 struct ahci_host_priv *hpriv = ap->host->private_data;
407 void __iomem *mmio = hpriv->mmio;
408 u32 em_ctl;
409
410 ahci_rpm_get_port(ap);
411 em_ctl = readl(mmio + HOST_EM_CTL);
412 ahci_rpm_put_port(ap);
413
414 return sprintf(buf, "%s%s%s%s\n",
415 em_ctl & EM_CTL_LED ? "led " : "",
416 em_ctl & EM_CTL_SAFTE ? "saf-te " : "",
417 em_ctl & EM_CTL_SES ? "ses-2 " : "",
418 em_ctl & EM_CTL_SGPIO ? "sgpio " : "");
419 }
420
421 /**
422 * ahci_save_initial_config - Save and fixup initial config values
423 * @dev: target AHCI device
424 * @hpriv: host private area to store config values
425 *
426 * Some registers containing configuration info might be setup by
427 * BIOS and might be cleared on reset. This function saves the
428 * initial values of those registers into @hpriv such that they
429 * can be restored after controller reset.
430 *
431 * If inconsistent, config values are fixed up by this function.
432 *
433 * If it is not set already this function sets hpriv->start_engine to
434 * ahci_start_engine.
435 *
436 * LOCKING:
437 * None.
438 */
439 void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv)
440 {
441 void __iomem *mmio = hpriv->mmio;
442 u32 cap, cap2, vers, port_map;
443 int i;
444
445 /* make sure AHCI mode is enabled before accessing CAP */
446 ahci_enable_ahci(mmio);
447
448 /* Values prefixed with saved_ are written back to host after
449 * reset. Values without are used for driver operation.
450 */
451 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
452 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
453
454 /* CAP2 register is only defined for AHCI 1.2 and later */
455 vers = readl(mmio + HOST_VERSION);
456 if ((vers >> 16) > 1 ||
457 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200))
458 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2);
459 else
460 hpriv->saved_cap2 = cap2 = 0;
461
462 /* some chips have errata preventing 64bit use */
463 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
464 dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n");
465 cap &= ~HOST_CAP_64;
466 }
467
468 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
469 dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n");
470 cap &= ~HOST_CAP_NCQ;
471 }
472
473 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) {
474 dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n");
475 cap |= HOST_CAP_NCQ;
476 }
477
478 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
479 dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n");
480 cap &= ~HOST_CAP_PMP;
481 }
482
483 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) {
484 dev_info(dev,
485 "controller can't do SNTF, turning off CAP_SNTF\n");
486 cap &= ~HOST_CAP_SNTF;
487 }
488
489 if ((cap2 & HOST_CAP2_SDS) && (hpriv->flags & AHCI_HFLAG_NO_DEVSLP)) {
490 dev_info(dev,
491 "controller can't do DEVSLP, turning off\n");
492 cap2 &= ~HOST_CAP2_SDS;
493 cap2 &= ~HOST_CAP2_SADM;
494 }
495
496 if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) {
497 dev_info(dev, "controller can do FBS, turning on CAP_FBS\n");
498 cap |= HOST_CAP_FBS;
499 }
500
501 if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) {
502 dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n");
503 cap &= ~HOST_CAP_FBS;
504 }
505
506 if (hpriv->force_port_map && port_map != hpriv->force_port_map) {
507 dev_info(dev, "forcing port_map 0x%x -> 0x%x\n",
508 port_map, hpriv->force_port_map);
509 port_map = hpriv->force_port_map;
510 hpriv->saved_port_map = port_map;
511 }
512
513 if (hpriv->mask_port_map) {
514 dev_warn(dev, "masking port_map 0x%x -> 0x%x\n",
515 port_map,
516 port_map & hpriv->mask_port_map);
517 port_map &= hpriv->mask_port_map;
518 }
519
520 /* cross check port_map and cap.n_ports */
521 if (port_map) {
522 int map_ports = 0;
523
524 for (i = 0; i < AHCI_MAX_PORTS; i++)
525 if (port_map & (1 << i))
526 map_ports++;
527
528 /* If PI has more ports than n_ports, whine, clear
529 * port_map and let it be generated from n_ports.
530 */
531 if (map_ports > ahci_nr_ports(cap)) {
532 dev_warn(dev,
533 "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n",
534 port_map, ahci_nr_ports(cap));
535 port_map = 0;
536 }
537 }
538
539 /* fabricate port_map from cap.nr_ports for < AHCI 1.3 */
540 if (!port_map && vers < 0x10300) {
541 port_map = (1 << ahci_nr_ports(cap)) - 1;
542 dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map);
543
544 /* write the fixed up value to the PI register */
545 hpriv->saved_port_map = port_map;
546 }
547
548 /* record values to use during operation */
549 hpriv->cap = cap;
550 hpriv->cap2 = cap2;
551 hpriv->version = readl(mmio + HOST_VERSION);
552 hpriv->port_map = port_map;
553
554 if (!hpriv->start_engine)
555 hpriv->start_engine = ahci_start_engine;
556
557 if (!hpriv->irq_handler)
558 hpriv->irq_handler = ahci_single_level_irq_intr;
559 }
560 EXPORT_SYMBOL_GPL(ahci_save_initial_config);
561
562 /**
563 * ahci_restore_initial_config - Restore initial config
564 * @host: target ATA host
565 *
566 * Restore initial config stored by ahci_save_initial_config().
567 *
568 * LOCKING:
569 * None.
570 */
571 static void ahci_restore_initial_config(struct ata_host *host)
572 {
573 struct ahci_host_priv *hpriv = host->private_data;
574 void __iomem *mmio = hpriv->mmio;
575
576 writel(hpriv->saved_cap, mmio + HOST_CAP);
577 if (hpriv->saved_cap2)
578 writel(hpriv->saved_cap2, mmio + HOST_CAP2);
579 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
580 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
581 }
582
583 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
584 {
585 static const int offset[] = {
586 [SCR_STATUS] = PORT_SCR_STAT,
587 [SCR_CONTROL] = PORT_SCR_CTL,
588 [SCR_ERROR] = PORT_SCR_ERR,
589 [SCR_ACTIVE] = PORT_SCR_ACT,
590 [SCR_NOTIFICATION] = PORT_SCR_NTF,
591 };
592 struct ahci_host_priv *hpriv = ap->host->private_data;
593
594 if (sc_reg < ARRAY_SIZE(offset) &&
595 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
596 return offset[sc_reg];
597 return 0;
598 }
599
600 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
601 {
602 void __iomem *port_mmio = ahci_port_base(link->ap);
603 int offset = ahci_scr_offset(link->ap, sc_reg);
604
605 if (offset) {
606 *val = readl(port_mmio + offset);
607 return 0;
608 }
609 return -EINVAL;
610 }
611
612 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
613 {
614 void __iomem *port_mmio = ahci_port_base(link->ap);
615 int offset = ahci_scr_offset(link->ap, sc_reg);
616
617 if (offset) {
618 writel(val, port_mmio + offset);
619 return 0;
620 }
621 return -EINVAL;
622 }
623
624 void ahci_start_engine(struct ata_port *ap)
625 {
626 void __iomem *port_mmio = ahci_port_base(ap);
627 u32 tmp;
628
629 /* start DMA */
630 tmp = readl(port_mmio + PORT_CMD);
631 tmp |= PORT_CMD_START;
632 writel(tmp, port_mmio + PORT_CMD);
633 readl(port_mmio + PORT_CMD); /* flush */
634 }
635 EXPORT_SYMBOL_GPL(ahci_start_engine);
636
637 int ahci_stop_engine(struct ata_port *ap)
638 {
639 void __iomem *port_mmio = ahci_port_base(ap);
640 struct ahci_host_priv *hpriv = ap->host->private_data;
641 u32 tmp;
642
643 /*
644 * On some controllers, stopping a port's DMA engine while the port
645 * is in ALPM state (partial or slumber) results in failures on
646 * subsequent DMA engine starts. For those controllers, put the
647 * port back in active state before stopping its DMA engine.
648 */
649 if ((hpriv->flags & AHCI_HFLAG_WAKE_BEFORE_STOP) &&
650 (ap->link.lpm_policy > ATA_LPM_MAX_POWER) &&
651 ahci_set_lpm(&ap->link, ATA_LPM_MAX_POWER, ATA_LPM_WAKE_ONLY)) {
652 dev_err(ap->host->dev, "Failed to wake up port before engine stop\n");
653 return -EIO;
654 }
655
656 tmp = readl(port_mmio + PORT_CMD);
657
658 /* check if the HBA is idle */
659 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
660 return 0;
661
662 /* setting HBA to idle */
663 tmp &= ~PORT_CMD_START;
664 writel(tmp, port_mmio + PORT_CMD);
665
666 /* wait for engine to stop. This could be as long as 500 msec */
667 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
668 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
669 if (tmp & PORT_CMD_LIST_ON)
670 return -EIO;
671
672 return 0;
673 }
674 EXPORT_SYMBOL_GPL(ahci_stop_engine);
675
676 void ahci_start_fis_rx(struct ata_port *ap)
677 {
678 void __iomem *port_mmio = ahci_port_base(ap);
679 struct ahci_host_priv *hpriv = ap->host->private_data;
680 struct ahci_port_priv *pp = ap->private_data;
681 u32 tmp;
682
683 /* set FIS registers */
684 if (hpriv->cap & HOST_CAP_64)
685 writel((pp->cmd_slot_dma >> 16) >> 16,
686 port_mmio + PORT_LST_ADDR_HI);
687 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
688
689 if (hpriv->cap & HOST_CAP_64)
690 writel((pp->rx_fis_dma >> 16) >> 16,
691 port_mmio + PORT_FIS_ADDR_HI);
692 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
693
694 /* enable FIS reception */
695 tmp = readl(port_mmio + PORT_CMD);
696 tmp |= PORT_CMD_FIS_RX;
697 writel(tmp, port_mmio + PORT_CMD);
698
699 /* flush */
700 readl(port_mmio + PORT_CMD);
701 }
702 EXPORT_SYMBOL_GPL(ahci_start_fis_rx);
703
704 static int ahci_stop_fis_rx(struct ata_port *ap)
705 {
706 void __iomem *port_mmio = ahci_port_base(ap);
707 u32 tmp;
708
709 /* disable FIS reception */
710 tmp = readl(port_mmio + PORT_CMD);
711 tmp &= ~PORT_CMD_FIS_RX;
712 writel(tmp, port_mmio + PORT_CMD);
713
714 /* wait for completion, spec says 500ms, give it 1000 */
715 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
716 PORT_CMD_FIS_ON, 10, 1000);
717 if (tmp & PORT_CMD_FIS_ON)
718 return -EBUSY;
719
720 return 0;
721 }
722
723 static void ahci_power_up(struct ata_port *ap)
724 {
725 struct ahci_host_priv *hpriv = ap->host->private_data;
726 void __iomem *port_mmio = ahci_port_base(ap);
727 u32 cmd;
728
729 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
730
731 /* spin up device */
732 if (hpriv->cap & HOST_CAP_SSS) {
733 cmd |= PORT_CMD_SPIN_UP;
734 writel(cmd, port_mmio + PORT_CMD);
735 }
736
737 /* wake up link */
738 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
739 }
740
741 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
742 unsigned int hints)
743 {
744 struct ata_port *ap = link->ap;
745 struct ahci_host_priv *hpriv = ap->host->private_data;
746 struct ahci_port_priv *pp = ap->private_data;
747 void __iomem *port_mmio = ahci_port_base(ap);
748
749 if (policy != ATA_LPM_MAX_POWER) {
750 /* wakeup flag only applies to the max power policy */
751 hints &= ~ATA_LPM_WAKE_ONLY;
752
753 /*
754 * Disable interrupts on Phy Ready. This keeps us from
755 * getting woken up due to spurious phy ready
756 * interrupts.
757 */
758 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
759 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
760
761 sata_link_scr_lpm(link, policy, false);
762 }
763
764 if (hpriv->cap & HOST_CAP_ALPM) {
765 u32 cmd = readl(port_mmio + PORT_CMD);
766
767 if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) {
768 if (!(hints & ATA_LPM_WAKE_ONLY))
769 cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE);
770 cmd |= PORT_CMD_ICC_ACTIVE;
771
772 writel(cmd, port_mmio + PORT_CMD);
773 readl(port_mmio + PORT_CMD);
774
775 /* wait 10ms to be sure we've come out of LPM state */
776 ata_msleep(ap, 10);
777
778 if (hints & ATA_LPM_WAKE_ONLY)
779 return 0;
780 } else {
781 cmd |= PORT_CMD_ALPE;
782 if (policy == ATA_LPM_MIN_POWER)
783 cmd |= PORT_CMD_ASP;
784
785 /* write out new cmd value */
786 writel(cmd, port_mmio + PORT_CMD);
787 }
788 }
789
790 /* set aggressive device sleep */
791 if ((hpriv->cap2 & HOST_CAP2_SDS) &&
792 (hpriv->cap2 & HOST_CAP2_SADM) &&
793 (link->device->flags & ATA_DFLAG_DEVSLP)) {
794 if (policy == ATA_LPM_MIN_POWER)
795 ahci_set_aggressive_devslp(ap, true);
796 else
797 ahci_set_aggressive_devslp(ap, false);
798 }
799
800 if (policy == ATA_LPM_MAX_POWER) {
801 sata_link_scr_lpm(link, policy, false);
802
803 /* turn PHYRDY IRQ back on */
804 pp->intr_mask |= PORT_IRQ_PHYRDY;
805 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
806 }
807
808 return 0;
809 }
810
811 #ifdef CONFIG_PM
812 static void ahci_power_down(struct ata_port *ap)
813 {
814 struct ahci_host_priv *hpriv = ap->host->private_data;
815 void __iomem *port_mmio = ahci_port_base(ap);
816 u32 cmd, scontrol;
817
818 if (!(hpriv->cap & HOST_CAP_SSS))
819 return;
820
821 /* put device into listen mode, first set PxSCTL.DET to 0 */
822 scontrol = readl(port_mmio + PORT_SCR_CTL);
823 scontrol &= ~0xf;
824 writel(scontrol, port_mmio + PORT_SCR_CTL);
825
826 /* then set PxCMD.SUD to 0 */
827 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
828 cmd &= ~PORT_CMD_SPIN_UP;
829 writel(cmd, port_mmio + PORT_CMD);
830 }
831 #endif
832
833 static void ahci_start_port(struct ata_port *ap)
834 {
835 struct ahci_host_priv *hpriv = ap->host->private_data;
836 struct ahci_port_priv *pp = ap->private_data;
837 struct ata_link *link;
838 struct ahci_em_priv *emp;
839 ssize_t rc;
840 int i;
841
842 /* enable FIS reception */
843 ahci_start_fis_rx(ap);
844
845 /* enable DMA */
846 if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE))
847 hpriv->start_engine(ap);
848
849 /* turn on LEDs */
850 if (ap->flags & ATA_FLAG_EM) {
851 ata_for_each_link(link, ap, EDGE) {
852 emp = &pp->em_priv[link->pmp];
853
854 /* EM Transmit bit maybe busy during init */
855 for (i = 0; i < EM_MAX_RETRY; i++) {
856 rc = ap->ops->transmit_led_message(ap,
857 emp->led_state,
858 4);
859 /*
860 * If busy, give a breather but do not
861 * release EH ownership by using msleep()
862 * instead of ata_msleep(). EM Transmit
863 * bit is busy for the whole host and
864 * releasing ownership will cause other
865 * ports to fail the same way.
866 */
867 if (rc == -EBUSY)
868 msleep(1);
869 else
870 break;
871 }
872 }
873 }
874
875 if (ap->flags & ATA_FLAG_SW_ACTIVITY)
876 ata_for_each_link(link, ap, EDGE)
877 ahci_init_sw_activity(link);
878
879 }
880
881 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
882 {
883 int rc;
884
885 /* disable DMA */
886 rc = ahci_stop_engine(ap);
887 if (rc) {
888 *emsg = "failed to stop engine";
889 return rc;
890 }
891
892 /* disable FIS reception */
893 rc = ahci_stop_fis_rx(ap);
894 if (rc) {
895 *emsg = "failed stop FIS RX";
896 return rc;
897 }
898
899 return 0;
900 }
901
902 int ahci_reset_controller(struct ata_host *host)
903 {
904 struct ahci_host_priv *hpriv = host->private_data;
905 void __iomem *mmio = hpriv->mmio;
906 u32 tmp;
907
908 /* we must be in AHCI mode, before using anything
909 * AHCI-specific, such as HOST_RESET.
910 */
911 ahci_enable_ahci(mmio);
912
913 /* global controller reset */
914 if (!ahci_skip_host_reset) {
915 tmp = readl(mmio + HOST_CTL);
916 if ((tmp & HOST_RESET) == 0) {
917 writel(tmp | HOST_RESET, mmio + HOST_CTL);
918 readl(mmio + HOST_CTL); /* flush */
919 }
920
921 /*
922 * to perform host reset, OS should set HOST_RESET
923 * and poll until this bit is read to be "0".
924 * reset must complete within 1 second, or
925 * the hardware should be considered fried.
926 */
927 tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET,
928 HOST_RESET, 10, 1000);
929
930 if (tmp & HOST_RESET) {
931 dev_err(host->dev, "controller reset failed (0x%x)\n",
932 tmp);
933 return -EIO;
934 }
935
936 /* turn on AHCI mode */
937 ahci_enable_ahci(mmio);
938
939 /* Some registers might be cleared on reset. Restore
940 * initial values.
941 */
942 ahci_restore_initial_config(host);
943 } else
944 dev_info(host->dev, "skipping global host reset\n");
945
946 return 0;
947 }
948 EXPORT_SYMBOL_GPL(ahci_reset_controller);
949
950 static void ahci_sw_activity(struct ata_link *link)
951 {
952 struct ata_port *ap = link->ap;
953 struct ahci_port_priv *pp = ap->private_data;
954 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
955
956 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
957 return;
958
959 emp->activity++;
960 if (!timer_pending(&emp->timer))
961 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
962 }
963
964 static void ahci_sw_activity_blink(unsigned long arg)
965 {
966 struct ata_link *link = (struct ata_link *)arg;
967 struct ata_port *ap = link->ap;
968 struct ahci_port_priv *pp = ap->private_data;
969 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
970 unsigned long led_message = emp->led_state;
971 u32 activity_led_state;
972 unsigned long flags;
973
974 led_message &= EM_MSG_LED_VALUE;
975 led_message |= ap->port_no | (link->pmp << 8);
976
977 /* check to see if we've had activity. If so,
978 * toggle state of LED and reset timer. If not,
979 * turn LED to desired idle state.
980 */
981 spin_lock_irqsave(ap->lock, flags);
982 if (emp->saved_activity != emp->activity) {
983 emp->saved_activity = emp->activity;
984 /* get the current LED state */
985 activity_led_state = led_message & EM_MSG_LED_VALUE_ON;
986
987 if (activity_led_state)
988 activity_led_state = 0;
989 else
990 activity_led_state = 1;
991
992 /* clear old state */
993 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
994
995 /* toggle state */
996 led_message |= (activity_led_state << 16);
997 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
998 } else {
999 /* switch to idle */
1000 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1001 if (emp->blink_policy == BLINK_OFF)
1002 led_message |= (1 << 16);
1003 }
1004 spin_unlock_irqrestore(ap->lock, flags);
1005 ap->ops->transmit_led_message(ap, led_message, 4);
1006 }
1007
1008 static void ahci_init_sw_activity(struct ata_link *link)
1009 {
1010 struct ata_port *ap = link->ap;
1011 struct ahci_port_priv *pp = ap->private_data;
1012 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1013
1014 /* init activity stats, setup timer */
1015 emp->saved_activity = emp->activity = 0;
1016 setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link);
1017
1018 /* check our blink policy and set flag for link if it's enabled */
1019 if (emp->blink_policy)
1020 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1021 }
1022
1023 int ahci_reset_em(struct ata_host *host)
1024 {
1025 struct ahci_host_priv *hpriv = host->private_data;
1026 void __iomem *mmio = hpriv->mmio;
1027 u32 em_ctl;
1028
1029 em_ctl = readl(mmio + HOST_EM_CTL);
1030 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
1031 return -EINVAL;
1032
1033 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
1034 return 0;
1035 }
1036 EXPORT_SYMBOL_GPL(ahci_reset_em);
1037
1038 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
1039 ssize_t size)
1040 {
1041 struct ahci_host_priv *hpriv = ap->host->private_data;
1042 struct ahci_port_priv *pp = ap->private_data;
1043 void __iomem *mmio = hpriv->mmio;
1044 u32 em_ctl;
1045 u32 message[] = {0, 0};
1046 unsigned long flags;
1047 int pmp;
1048 struct ahci_em_priv *emp;
1049
1050 /* get the slot number from the message */
1051 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1052 if (pmp < EM_MAX_SLOTS)
1053 emp = &pp->em_priv[pmp];
1054 else
1055 return -EINVAL;
1056
1057 ahci_rpm_get_port(ap);
1058 spin_lock_irqsave(ap->lock, flags);
1059
1060 /*
1061 * if we are still busy transmitting a previous message,
1062 * do not allow
1063 */
1064 em_ctl = readl(mmio + HOST_EM_CTL);
1065 if (em_ctl & EM_CTL_TM) {
1066 spin_unlock_irqrestore(ap->lock, flags);
1067 ahci_rpm_put_port(ap);
1068 return -EBUSY;
1069 }
1070
1071 if (hpriv->em_msg_type & EM_MSG_TYPE_LED) {
1072 /*
1073 * create message header - this is all zero except for
1074 * the message size, which is 4 bytes.
1075 */
1076 message[0] |= (4 << 8);
1077
1078 /* ignore 0:4 of byte zero, fill in port info yourself */
1079 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no);
1080
1081 /* write message to EM_LOC */
1082 writel(message[0], mmio + hpriv->em_loc);
1083 writel(message[1], mmio + hpriv->em_loc+4);
1084
1085 /*
1086 * tell hardware to transmit the message
1087 */
1088 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
1089 }
1090
1091 /* save off new led state for port/slot */
1092 emp->led_state = state;
1093
1094 spin_unlock_irqrestore(ap->lock, flags);
1095 ahci_rpm_put_port(ap);
1096
1097 return size;
1098 }
1099
1100 static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
1101 {
1102 struct ahci_port_priv *pp = ap->private_data;
1103 struct ata_link *link;
1104 struct ahci_em_priv *emp;
1105 int rc = 0;
1106
1107 ata_for_each_link(link, ap, EDGE) {
1108 emp = &pp->em_priv[link->pmp];
1109 rc += sprintf(buf, "%lx\n", emp->led_state);
1110 }
1111 return rc;
1112 }
1113
1114 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
1115 size_t size)
1116 {
1117 unsigned int state;
1118 int pmp;
1119 struct ahci_port_priv *pp = ap->private_data;
1120 struct ahci_em_priv *emp;
1121
1122 if (kstrtouint(buf, 0, &state) < 0)
1123 return -EINVAL;
1124
1125 /* get the slot number from the message */
1126 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1127 if (pmp < EM_MAX_SLOTS)
1128 emp = &pp->em_priv[pmp];
1129 else
1130 return -EINVAL;
1131
1132 /* mask off the activity bits if we are in sw_activity
1133 * mode, user should turn off sw_activity before setting
1134 * activity led through em_message
1135 */
1136 if (emp->blink_policy)
1137 state &= ~EM_MSG_LED_VALUE_ACTIVITY;
1138
1139 return ap->ops->transmit_led_message(ap, state, size);
1140 }
1141
1142 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
1143 {
1144 struct ata_link *link = dev->link;
1145 struct ata_port *ap = link->ap;
1146 struct ahci_port_priv *pp = ap->private_data;
1147 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1148 u32 port_led_state = emp->led_state;
1149
1150 /* save the desired Activity LED behavior */
1151 if (val == OFF) {
1152 /* clear LFLAG */
1153 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
1154
1155 /* set the LED to OFF */
1156 port_led_state &= EM_MSG_LED_VALUE_OFF;
1157 port_led_state |= (ap->port_no | (link->pmp << 8));
1158 ap->ops->transmit_led_message(ap, port_led_state, 4);
1159 } else {
1160 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1161 if (val == BLINK_OFF) {
1162 /* set LED to ON for idle */
1163 port_led_state &= EM_MSG_LED_VALUE_OFF;
1164 port_led_state |= (ap->port_no | (link->pmp << 8));
1165 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */
1166 ap->ops->transmit_led_message(ap, port_led_state, 4);
1167 }
1168 }
1169 emp->blink_policy = val;
1170 return 0;
1171 }
1172
1173 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
1174 {
1175 struct ata_link *link = dev->link;
1176 struct ata_port *ap = link->ap;
1177 struct ahci_port_priv *pp = ap->private_data;
1178 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1179
1180 /* display the saved value of activity behavior for this
1181 * disk.
1182 */
1183 return sprintf(buf, "%d\n", emp->blink_policy);
1184 }
1185
1186 static void ahci_port_init(struct device *dev, struct ata_port *ap,
1187 int port_no, void __iomem *mmio,
1188 void __iomem *port_mmio)
1189 {
1190 struct ahci_host_priv *hpriv = ap->host->private_data;
1191 const char *emsg = NULL;
1192 int rc;
1193 u32 tmp;
1194
1195 /* make sure port is not active */
1196 rc = ahci_deinit_port(ap, &emsg);
1197 if (rc)
1198 dev_warn(dev, "%s (%d)\n", emsg, rc);
1199
1200 /* clear SError */
1201 tmp = readl(port_mmio + PORT_SCR_ERR);
1202 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1203 writel(tmp, port_mmio + PORT_SCR_ERR);
1204
1205 /* clear port IRQ */
1206 tmp = readl(port_mmio + PORT_IRQ_STAT);
1207 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1208 if (tmp)
1209 writel(tmp, port_mmio + PORT_IRQ_STAT);
1210
1211 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1212
1213 /* mark esata ports */
1214 tmp = readl(port_mmio + PORT_CMD);
1215 if ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS))
1216 ap->pflags |= ATA_PFLAG_EXTERNAL;
1217 }
1218
1219 void ahci_init_controller(struct ata_host *host)
1220 {
1221 struct ahci_host_priv *hpriv = host->private_data;
1222 void __iomem *mmio = hpriv->mmio;
1223 int i;
1224 void __iomem *port_mmio;
1225 u32 tmp;
1226
1227 for (i = 0; i < host->n_ports; i++) {
1228 struct ata_port *ap = host->ports[i];
1229
1230 port_mmio = ahci_port_base(ap);
1231 if (ata_port_is_dummy(ap))
1232 continue;
1233
1234 ahci_port_init(host->dev, ap, i, mmio, port_mmio);
1235 }
1236
1237 tmp = readl(mmio + HOST_CTL);
1238 VPRINTK("HOST_CTL 0x%x\n", tmp);
1239 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1240 tmp = readl(mmio + HOST_CTL);
1241 VPRINTK("HOST_CTL 0x%x\n", tmp);
1242 }
1243 EXPORT_SYMBOL_GPL(ahci_init_controller);
1244
1245 static void ahci_dev_config(struct ata_device *dev)
1246 {
1247 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1248
1249 if (hpriv->flags & AHCI_HFLAG_SECT255) {
1250 dev->max_sectors = 255;
1251 ata_dev_info(dev,
1252 "SB600 AHCI: limiting to 255 sectors per cmd\n");
1253 }
1254 }
1255
1256 unsigned int ahci_dev_classify(struct ata_port *ap)
1257 {
1258 void __iomem *port_mmio = ahci_port_base(ap);
1259 struct ata_taskfile tf;
1260 u32 tmp;
1261
1262 tmp = readl(port_mmio + PORT_SIG);
1263 tf.lbah = (tmp >> 24) & 0xff;
1264 tf.lbam = (tmp >> 16) & 0xff;
1265 tf.lbal = (tmp >> 8) & 0xff;
1266 tf.nsect = (tmp) & 0xff;
1267
1268 return ata_dev_classify(&tf);
1269 }
1270 EXPORT_SYMBOL_GPL(ahci_dev_classify);
1271
1272 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1273 u32 opts)
1274 {
1275 dma_addr_t cmd_tbl_dma;
1276
1277 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1278
1279 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1280 pp->cmd_slot[tag].status = 0;
1281 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1282 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1283 }
1284 EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot);
1285
1286 int ahci_kick_engine(struct ata_port *ap)
1287 {
1288 void __iomem *port_mmio = ahci_port_base(ap);
1289 struct ahci_host_priv *hpriv = ap->host->private_data;
1290 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1291 u32 tmp;
1292 int busy, rc;
1293
1294 /* stop engine */
1295 rc = ahci_stop_engine(ap);
1296 if (rc)
1297 goto out_restart;
1298
1299 /* need to do CLO?
1300 * always do CLO if PMP is attached (AHCI-1.3 9.2)
1301 */
1302 busy = status & (ATA_BUSY | ATA_DRQ);
1303 if (!busy && !sata_pmp_attached(ap)) {
1304 rc = 0;
1305 goto out_restart;
1306 }
1307
1308 if (!(hpriv->cap & HOST_CAP_CLO)) {
1309 rc = -EOPNOTSUPP;
1310 goto out_restart;
1311 }
1312
1313 /* perform CLO */
1314 tmp = readl(port_mmio + PORT_CMD);
1315 tmp |= PORT_CMD_CLO;
1316 writel(tmp, port_mmio + PORT_CMD);
1317
1318 rc = 0;
1319 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
1320 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1321 if (tmp & PORT_CMD_CLO)
1322 rc = -EIO;
1323
1324 /* restart engine */
1325 out_restart:
1326 hpriv->start_engine(ap);
1327 return rc;
1328 }
1329 EXPORT_SYMBOL_GPL(ahci_kick_engine);
1330
1331 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1332 struct ata_taskfile *tf, int is_cmd, u16 flags,
1333 unsigned long timeout_msec)
1334 {
1335 const u32 cmd_fis_len = 5; /* five dwords */
1336 struct ahci_port_priv *pp = ap->private_data;
1337 void __iomem *port_mmio = ahci_port_base(ap);
1338 u8 *fis = pp->cmd_tbl;
1339 u32 tmp;
1340
1341 /* prep the command */
1342 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1343 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1344
1345 /* set port value for softreset of Port Multiplier */
1346 if (pp->fbs_enabled && pp->fbs_last_dev != pmp) {
1347 tmp = readl(port_mmio + PORT_FBS);
1348 tmp &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
1349 tmp |= pmp << PORT_FBS_DEV_OFFSET;
1350 writel(tmp, port_mmio + PORT_FBS);
1351 pp->fbs_last_dev = pmp;
1352 }
1353
1354 /* issue & wait */
1355 writel(1, port_mmio + PORT_CMD_ISSUE);
1356
1357 if (timeout_msec) {
1358 tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE,
1359 0x1, 0x1, 1, timeout_msec);
1360 if (tmp & 0x1) {
1361 ahci_kick_engine(ap);
1362 return -EBUSY;
1363 }
1364 } else
1365 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1366
1367 return 0;
1368 }
1369
1370 int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1371 int pmp, unsigned long deadline,
1372 int (*check_ready)(struct ata_link *link))
1373 {
1374 struct ata_port *ap = link->ap;
1375 struct ahci_host_priv *hpriv = ap->host->private_data;
1376 struct ahci_port_priv *pp = ap->private_data;
1377 const char *reason = NULL;
1378 unsigned long now, msecs;
1379 struct ata_taskfile tf;
1380 bool fbs_disabled = false;
1381 int rc;
1382
1383 DPRINTK("ENTER\n");
1384
1385 /* prepare for SRST (AHCI-1.1 10.4.1) */
1386 rc = ahci_kick_engine(ap);
1387 if (rc && rc != -EOPNOTSUPP)
1388 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc);
1389
1390 /*
1391 * According to AHCI-1.2 9.3.9: if FBS is enable, software shall
1392 * clear PxFBS.EN to '0' prior to issuing software reset to devices
1393 * that is attached to port multiplier.
1394 */
1395 if (!ata_is_host_link(link) && pp->fbs_enabled) {
1396 ahci_disable_fbs(ap);
1397 fbs_disabled = true;
1398 }
1399
1400 ata_tf_init(link->device, &tf);
1401
1402 /* issue the first D2H Register FIS */
1403 msecs = 0;
1404 now = jiffies;
1405 if (time_after(deadline, now))
1406 msecs = jiffies_to_msecs(deadline - now);
1407
1408 tf.ctl |= ATA_SRST;
1409 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1410 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1411 rc = -EIO;
1412 reason = "1st FIS failed";
1413 goto fail;
1414 }
1415
1416 /* spec says at least 5us, but be generous and sleep for 1ms */
1417 ata_msleep(ap, 1);
1418
1419 /* issue the second D2H Register FIS */
1420 tf.ctl &= ~ATA_SRST;
1421 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1422
1423 /* wait for link to become ready */
1424 rc = ata_wait_after_reset(link, deadline, check_ready);
1425 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) {
1426 /*
1427 * Workaround for cases where link online status can't
1428 * be trusted. Treat device readiness timeout as link
1429 * offline.
1430 */
1431 ata_link_info(link, "device not ready, treating as offline\n");
1432 *class = ATA_DEV_NONE;
1433 } else if (rc) {
1434 /* link occupied, -ENODEV too is an error */
1435 reason = "device not ready";
1436 goto fail;
1437 } else
1438 *class = ahci_dev_classify(ap);
1439
1440 /* re-enable FBS if disabled before */
1441 if (fbs_disabled)
1442 ahci_enable_fbs(ap);
1443
1444 DPRINTK("EXIT, class=%u\n", *class);
1445 return 0;
1446
1447 fail:
1448 ata_link_err(link, "softreset failed (%s)\n", reason);
1449 return rc;
1450 }
1451
1452 int ahci_check_ready(struct ata_link *link)
1453 {
1454 void __iomem *port_mmio = ahci_port_base(link->ap);
1455 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1456
1457 return ata_check_ready(status);
1458 }
1459 EXPORT_SYMBOL_GPL(ahci_check_ready);
1460
1461 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1462 unsigned long deadline)
1463 {
1464 int pmp = sata_srst_pmp(link);
1465
1466 DPRINTK("ENTER\n");
1467
1468 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
1469 }
1470 EXPORT_SYMBOL_GPL(ahci_do_softreset);
1471
1472 static int ahci_bad_pmp_check_ready(struct ata_link *link)
1473 {
1474 void __iomem *port_mmio = ahci_port_base(link->ap);
1475 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1476 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT);
1477
1478 /*
1479 * There is no need to check TFDATA if BAD PMP is found due to HW bug,
1480 * which can save timeout delay.
1481 */
1482 if (irq_status & PORT_IRQ_BAD_PMP)
1483 return -EIO;
1484
1485 return ata_check_ready(status);
1486 }
1487
1488 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
1489 unsigned long deadline)
1490 {
1491 struct ata_port *ap = link->ap;
1492 void __iomem *port_mmio = ahci_port_base(ap);
1493 int pmp = sata_srst_pmp(link);
1494 int rc;
1495 u32 irq_sts;
1496
1497 DPRINTK("ENTER\n");
1498
1499 rc = ahci_do_softreset(link, class, pmp, deadline,
1500 ahci_bad_pmp_check_ready);
1501
1502 /*
1503 * Soft reset fails with IPMS set when PMP is enabled but
1504 * SATA HDD/ODD is connected to SATA port, do soft reset
1505 * again to port 0.
1506 */
1507 if (rc == -EIO) {
1508 irq_sts = readl(port_mmio + PORT_IRQ_STAT);
1509 if (irq_sts & PORT_IRQ_BAD_PMP) {
1510 ata_link_warn(link,
1511 "applying PMP SRST workaround "
1512 "and retrying\n");
1513 rc = ahci_do_softreset(link, class, 0, deadline,
1514 ahci_check_ready);
1515 }
1516 }
1517
1518 return rc;
1519 }
1520
1521 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1522 unsigned long deadline)
1523 {
1524 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
1525 struct ata_port *ap = link->ap;
1526 struct ahci_port_priv *pp = ap->private_data;
1527 struct ahci_host_priv *hpriv = ap->host->private_data;
1528 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1529 struct ata_taskfile tf;
1530 bool online;
1531 int rc;
1532
1533 DPRINTK("ENTER\n");
1534
1535 ahci_stop_engine(ap);
1536
1537 /* clear D2H reception area to properly wait for D2H FIS */
1538 ata_tf_init(link->device, &tf);
1539 tf.command = ATA_BUSY;
1540 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1541
1542 rc = sata_link_hardreset(link, timing, deadline, &online,
1543 ahci_check_ready);
1544
1545 hpriv->start_engine(ap);
1546
1547 if (online)
1548 *class = ahci_dev_classify(ap);
1549
1550 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1551 return rc;
1552 }
1553
1554 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1555 {
1556 struct ata_port *ap = link->ap;
1557 void __iomem *port_mmio = ahci_port_base(ap);
1558 u32 new_tmp, tmp;
1559
1560 ata_std_postreset(link, class);
1561
1562 /* Make sure port's ATAPI bit is set appropriately */
1563 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1564 if (*class == ATA_DEV_ATAPI)
1565 new_tmp |= PORT_CMD_ATAPI;
1566 else
1567 new_tmp &= ~PORT_CMD_ATAPI;
1568 if (new_tmp != tmp) {
1569 writel(new_tmp, port_mmio + PORT_CMD);
1570 readl(port_mmio + PORT_CMD); /* flush */
1571 }
1572 }
1573
1574 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1575 {
1576 struct scatterlist *sg;
1577 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1578 unsigned int si;
1579
1580 VPRINTK("ENTER\n");
1581
1582 /*
1583 * Next, the S/G list.
1584 */
1585 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1586 dma_addr_t addr = sg_dma_address(sg);
1587 u32 sg_len = sg_dma_len(sg);
1588
1589 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
1590 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
1591 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
1592 }
1593
1594 return si;
1595 }
1596
1597 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc)
1598 {
1599 struct ata_port *ap = qc->ap;
1600 struct ahci_port_priv *pp = ap->private_data;
1601
1602 if (!sata_pmp_attached(ap) || pp->fbs_enabled)
1603 return ata_std_qc_defer(qc);
1604 else
1605 return sata_pmp_qc_defer_cmd_switch(qc);
1606 }
1607
1608 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1609 {
1610 struct ata_port *ap = qc->ap;
1611 struct ahci_port_priv *pp = ap->private_data;
1612 int is_atapi = ata_is_atapi(qc->tf.protocol);
1613 void *cmd_tbl;
1614 u32 opts;
1615 const u32 cmd_fis_len = 5; /* five dwords */
1616 unsigned int n_elem;
1617
1618 /*
1619 * Fill in command table information. First, the header,
1620 * a SATA Register - Host to Device command FIS.
1621 */
1622 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1623
1624 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1625 if (is_atapi) {
1626 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1627 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1628 }
1629
1630 n_elem = 0;
1631 if (qc->flags & ATA_QCFLAG_DMAMAP)
1632 n_elem = ahci_fill_sg(qc, cmd_tbl);
1633
1634 /*
1635 * Fill in command slot information.
1636 */
1637 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1638 if (qc->tf.flags & ATA_TFLAG_WRITE)
1639 opts |= AHCI_CMD_WRITE;
1640 if (is_atapi)
1641 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1642
1643 ahci_fill_cmd_slot(pp, qc->tag, opts);
1644 }
1645
1646 static void ahci_fbs_dec_intr(struct ata_port *ap)
1647 {
1648 struct ahci_port_priv *pp = ap->private_data;
1649 void __iomem *port_mmio = ahci_port_base(ap);
1650 u32 fbs = readl(port_mmio + PORT_FBS);
1651 int retries = 3;
1652
1653 DPRINTK("ENTER\n");
1654 BUG_ON(!pp->fbs_enabled);
1655
1656 /* time to wait for DEC is not specified by AHCI spec,
1657 * add a retry loop for safety.
1658 */
1659 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS);
1660 fbs = readl(port_mmio + PORT_FBS);
1661 while ((fbs & PORT_FBS_DEC) && retries--) {
1662 udelay(1);
1663 fbs = readl(port_mmio + PORT_FBS);
1664 }
1665
1666 if (fbs & PORT_FBS_DEC)
1667 dev_err(ap->host->dev, "failed to clear device error\n");
1668 }
1669
1670 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1671 {
1672 struct ahci_host_priv *hpriv = ap->host->private_data;
1673 struct ahci_port_priv *pp = ap->private_data;
1674 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1675 struct ata_link *link = NULL;
1676 struct ata_queued_cmd *active_qc;
1677 struct ata_eh_info *active_ehi;
1678 bool fbs_need_dec = false;
1679 u32 serror;
1680
1681 /* determine active link with error */
1682 if (pp->fbs_enabled) {
1683 void __iomem *port_mmio = ahci_port_base(ap);
1684 u32 fbs = readl(port_mmio + PORT_FBS);
1685 int pmp = fbs >> PORT_FBS_DWE_OFFSET;
1686
1687 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) {
1688 link = &ap->pmp_link[pmp];
1689 fbs_need_dec = true;
1690 }
1691
1692 } else
1693 ata_for_each_link(link, ap, EDGE)
1694 if (ata_link_active(link))
1695 break;
1696
1697 if (!link)
1698 link = &ap->link;
1699
1700 active_qc = ata_qc_from_tag(ap, link->active_tag);
1701 active_ehi = &link->eh_info;
1702
1703 /* record irq stat */
1704 ata_ehi_clear_desc(host_ehi);
1705 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1706
1707 /* AHCI needs SError cleared; otherwise, it might lock up */
1708 ahci_scr_read(&ap->link, SCR_ERROR, &serror);
1709 ahci_scr_write(&ap->link, SCR_ERROR, serror);
1710 host_ehi->serror |= serror;
1711
1712 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1713 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1714 irq_stat &= ~PORT_IRQ_IF_ERR;
1715
1716 if (irq_stat & PORT_IRQ_TF_ERR) {
1717 /* If qc is active, charge it; otherwise, the active
1718 * link. There's no active qc on NCQ errors. It will
1719 * be determined by EH by reading log page 10h.
1720 */
1721 if (active_qc)
1722 active_qc->err_mask |= AC_ERR_DEV;
1723 else
1724 active_ehi->err_mask |= AC_ERR_DEV;
1725
1726 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1727 host_ehi->serror &= ~SERR_INTERNAL;
1728 }
1729
1730 if (irq_stat & PORT_IRQ_UNK_FIS) {
1731 u32 *unk = pp->rx_fis + RX_FIS_UNK;
1732
1733 active_ehi->err_mask |= AC_ERR_HSM;
1734 active_ehi->action |= ATA_EH_RESET;
1735 ata_ehi_push_desc(active_ehi,
1736 "unknown FIS %08x %08x %08x %08x" ,
1737 unk[0], unk[1], unk[2], unk[3]);
1738 }
1739
1740 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) {
1741 active_ehi->err_mask |= AC_ERR_HSM;
1742 active_ehi->action |= ATA_EH_RESET;
1743 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1744 }
1745
1746 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1747 host_ehi->err_mask |= AC_ERR_HOST_BUS;
1748 host_ehi->action |= ATA_EH_RESET;
1749 ata_ehi_push_desc(host_ehi, "host bus error");
1750 }
1751
1752 if (irq_stat & PORT_IRQ_IF_ERR) {
1753 if (fbs_need_dec)
1754 active_ehi->err_mask |= AC_ERR_DEV;
1755 else {
1756 host_ehi->err_mask |= AC_ERR_ATA_BUS;
1757 host_ehi->action |= ATA_EH_RESET;
1758 }
1759
1760 ata_ehi_push_desc(host_ehi, "interface fatal error");
1761 }
1762
1763 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1764 ata_ehi_hotplugged(host_ehi);
1765 ata_ehi_push_desc(host_ehi, "%s",
1766 irq_stat & PORT_IRQ_CONNECT ?
1767 "connection status changed" : "PHY RDY changed");
1768 }
1769
1770 /* okay, let's hand over to EH */
1771
1772 if (irq_stat & PORT_IRQ_FREEZE)
1773 ata_port_freeze(ap);
1774 else if (fbs_need_dec) {
1775 ata_link_abort(link);
1776 ahci_fbs_dec_intr(ap);
1777 } else
1778 ata_port_abort(ap);
1779 }
1780
1781 static void ahci_handle_port_interrupt(struct ata_port *ap,
1782 void __iomem *port_mmio, u32 status)
1783 {
1784 struct ata_eh_info *ehi = &ap->link.eh_info;
1785 struct ahci_port_priv *pp = ap->private_data;
1786 struct ahci_host_priv *hpriv = ap->host->private_data;
1787 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
1788 u32 qc_active = 0;
1789 int rc;
1790
1791 /* ignore BAD_PMP while resetting */
1792 if (unlikely(resetting))
1793 status &= ~PORT_IRQ_BAD_PMP;
1794
1795 if (sata_lpm_ignore_phy_events(&ap->link)) {
1796 status &= ~PORT_IRQ_PHYRDY;
1797 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
1798 }
1799
1800 if (unlikely(status & PORT_IRQ_ERROR)) {
1801 ahci_error_intr(ap, status);
1802 return;
1803 }
1804
1805 if (status & PORT_IRQ_SDB_FIS) {
1806 /* If SNotification is available, leave notification
1807 * handling to sata_async_notification(). If not,
1808 * emulate it by snooping SDB FIS RX area.
1809 *
1810 * Snooping FIS RX area is probably cheaper than
1811 * poking SNotification but some constrollers which
1812 * implement SNotification, ICH9 for example, don't
1813 * store AN SDB FIS into receive area.
1814 */
1815 if (hpriv->cap & HOST_CAP_SNTF)
1816 sata_async_notification(ap);
1817 else {
1818 /* If the 'N' bit in word 0 of the FIS is set,
1819 * we just received asynchronous notification.
1820 * Tell libata about it.
1821 *
1822 * Lack of SNotification should not appear in
1823 * ahci 1.2, so the workaround is unnecessary
1824 * when FBS is enabled.
1825 */
1826 if (pp->fbs_enabled)
1827 WARN_ON_ONCE(1);
1828 else {
1829 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1830 u32 f0 = le32_to_cpu(f[0]);
1831 if (f0 & (1 << 15))
1832 sata_async_notification(ap);
1833 }
1834 }
1835 }
1836
1837 /* pp->active_link is not reliable once FBS is enabled, both
1838 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because
1839 * NCQ and non-NCQ commands may be in flight at the same time.
1840 */
1841 if (pp->fbs_enabled) {
1842 if (ap->qc_active) {
1843 qc_active = readl(port_mmio + PORT_SCR_ACT);
1844 qc_active |= readl(port_mmio + PORT_CMD_ISSUE);
1845 }
1846 } else {
1847 /* pp->active_link is valid iff any command is in flight */
1848 if (ap->qc_active && pp->active_link->sactive)
1849 qc_active = readl(port_mmio + PORT_SCR_ACT);
1850 else
1851 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1852 }
1853
1854
1855 rc = ata_qc_complete_multiple(ap, qc_active);
1856
1857 /* while resetting, invalid completions are expected */
1858 if (unlikely(rc < 0 && !resetting)) {
1859 ehi->err_mask |= AC_ERR_HSM;
1860 ehi->action |= ATA_EH_RESET;
1861 ata_port_freeze(ap);
1862 }
1863 }
1864
1865 static void ahci_port_intr(struct ata_port *ap)
1866 {
1867 void __iomem *port_mmio = ahci_port_base(ap);
1868 u32 status;
1869
1870 status = readl(port_mmio + PORT_IRQ_STAT);
1871 writel(status, port_mmio + PORT_IRQ_STAT);
1872
1873 ahci_handle_port_interrupt(ap, port_mmio, status);
1874 }
1875
1876 static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance)
1877 {
1878 struct ata_port *ap = dev_instance;
1879 void __iomem *port_mmio = ahci_port_base(ap);
1880 u32 status;
1881
1882 VPRINTK("ENTER\n");
1883
1884 status = readl(port_mmio + PORT_IRQ_STAT);
1885 writel(status, port_mmio + PORT_IRQ_STAT);
1886
1887 spin_lock(ap->lock);
1888 ahci_handle_port_interrupt(ap, port_mmio, status);
1889 spin_unlock(ap->lock);
1890
1891 VPRINTK("EXIT\n");
1892
1893 return IRQ_HANDLED;
1894 }
1895
1896 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked)
1897 {
1898 unsigned int i, handled = 0;
1899
1900 for (i = 0; i < host->n_ports; i++) {
1901 struct ata_port *ap;
1902
1903 if (!(irq_masked & (1 << i)))
1904 continue;
1905
1906 ap = host->ports[i];
1907 if (ap) {
1908 ahci_port_intr(ap);
1909 VPRINTK("port %u\n", i);
1910 } else {
1911 VPRINTK("port %u (no irq)\n", i);
1912 if (ata_ratelimit())
1913 dev_warn(host->dev,
1914 "interrupt on disabled port %u\n", i);
1915 }
1916
1917 handled = 1;
1918 }
1919
1920 return handled;
1921 }
1922 EXPORT_SYMBOL_GPL(ahci_handle_port_intr);
1923
1924 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance)
1925 {
1926 struct ata_host *host = dev_instance;
1927 struct ahci_host_priv *hpriv;
1928 unsigned int rc = 0;
1929 void __iomem *mmio;
1930 u32 irq_stat, irq_masked;
1931
1932 VPRINTK("ENTER\n");
1933
1934 hpriv = host->private_data;
1935 mmio = hpriv->mmio;
1936
1937 /* sigh. 0xffffffff is a valid return from h/w */
1938 irq_stat = readl(mmio + HOST_IRQ_STAT);
1939 if (!irq_stat)
1940 return IRQ_NONE;
1941
1942 irq_masked = irq_stat & hpriv->port_map;
1943
1944 spin_lock(&host->lock);
1945
1946 rc = ahci_handle_port_intr(host, irq_masked);
1947
1948 /* HOST_IRQ_STAT behaves as level triggered latch meaning that
1949 * it should be cleared after all the port events are cleared;
1950 * otherwise, it will raise a spurious interrupt after each
1951 * valid one. Please read section 10.6.2 of ahci 1.1 for more
1952 * information.
1953 *
1954 * Also, use the unmasked value to clear interrupt as spurious
1955 * pending event on a dummy port might cause screaming IRQ.
1956 */
1957 writel(irq_stat, mmio + HOST_IRQ_STAT);
1958
1959 spin_unlock(&host->lock);
1960
1961 VPRINTK("EXIT\n");
1962
1963 return IRQ_RETVAL(rc);
1964 }
1965
1966 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1967 {
1968 struct ata_port *ap = qc->ap;
1969 void __iomem *port_mmio = ahci_port_base(ap);
1970 struct ahci_port_priv *pp = ap->private_data;
1971
1972 /* Keep track of the currently active link. It will be used
1973 * in completion path to determine whether NCQ phase is in
1974 * progress.
1975 */
1976 pp->active_link = qc->dev->link;
1977
1978 if (ata_is_ncq(qc->tf.protocol))
1979 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1980
1981 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) {
1982 u32 fbs = readl(port_mmio + PORT_FBS);
1983 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
1984 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET;
1985 writel(fbs, port_mmio + PORT_FBS);
1986 pp->fbs_last_dev = qc->dev->link->pmp;
1987 }
1988
1989 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1990
1991 ahci_sw_activity(qc->dev->link);
1992
1993 return 0;
1994 }
1995 EXPORT_SYMBOL_GPL(ahci_qc_issue);
1996
1997 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
1998 {
1999 struct ahci_port_priv *pp = qc->ap->private_data;
2000 u8 *rx_fis = pp->rx_fis;
2001
2002 if (pp->fbs_enabled)
2003 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
2004
2005 /*
2006 * After a successful execution of an ATA PIO data-in command,
2007 * the device doesn't send D2H Reg FIS to update the TF and
2008 * the host should take TF and E_Status from the preceding PIO
2009 * Setup FIS.
2010 */
2011 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE &&
2012 !(qc->flags & ATA_QCFLAG_FAILED)) {
2013 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
2014 qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15];
2015 } else
2016 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);
2017
2018 return true;
2019 }
2020
2021 static void ahci_freeze(struct ata_port *ap)
2022 {
2023 void __iomem *port_mmio = ahci_port_base(ap);
2024
2025 /* turn IRQ off */
2026 writel(0, port_mmio + PORT_IRQ_MASK);
2027 }
2028
2029 static void ahci_thaw(struct ata_port *ap)
2030 {
2031 struct ahci_host_priv *hpriv = ap->host->private_data;
2032 void __iomem *mmio = hpriv->mmio;
2033 void __iomem *port_mmio = ahci_port_base(ap);
2034 u32 tmp;
2035 struct ahci_port_priv *pp = ap->private_data;
2036
2037 /* clear IRQ */
2038 tmp = readl(port_mmio + PORT_IRQ_STAT);
2039 writel(tmp, port_mmio + PORT_IRQ_STAT);
2040 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
2041
2042 /* turn IRQ back on */
2043 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2044 }
2045
2046 void ahci_error_handler(struct ata_port *ap)
2047 {
2048 struct ahci_host_priv *hpriv = ap->host->private_data;
2049
2050 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
2051 /* restart engine */
2052 ahci_stop_engine(ap);
2053 hpriv->start_engine(ap);
2054 }
2055
2056 sata_pmp_error_handler(ap);
2057
2058 if (!ata_dev_enabled(ap->link.device))
2059 ahci_stop_engine(ap);
2060 }
2061 EXPORT_SYMBOL_GPL(ahci_error_handler);
2062
2063 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
2064 {
2065 struct ata_port *ap = qc->ap;
2066
2067 /* make DMA engine forget about the failed command */
2068 if (qc->flags & ATA_QCFLAG_FAILED)
2069 ahci_kick_engine(ap);
2070 }
2071
2072 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
2073 {
2074 struct ahci_host_priv *hpriv = ap->host->private_data;
2075 void __iomem *port_mmio = ahci_port_base(ap);
2076 struct ata_device *dev = ap->link.device;
2077 u32 devslp, dm, dito, mdat, deto;
2078 int rc;
2079 unsigned int err_mask;
2080
2081 devslp = readl(port_mmio + PORT_DEVSLP);
2082 if (!(devslp & PORT_DEVSLP_DSP)) {
2083 dev_info(ap->host->dev, "port does not support device sleep\n");
2084 return;
2085 }
2086
2087 /* disable device sleep */
2088 if (!sleep) {
2089 if (devslp & PORT_DEVSLP_ADSE) {
2090 writel(devslp & ~PORT_DEVSLP_ADSE,
2091 port_mmio + PORT_DEVSLP);
2092 err_mask = ata_dev_set_feature(dev,
2093 SETFEATURES_SATA_DISABLE,
2094 SATA_DEVSLP);
2095 if (err_mask && err_mask != AC_ERR_DEV)
2096 ata_dev_warn(dev, "failed to disable DEVSLP\n");
2097 }
2098 return;
2099 }
2100
2101 /* device sleep was already enabled */
2102 if (devslp & PORT_DEVSLP_ADSE)
2103 return;
2104
2105 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */
2106 rc = ahci_stop_engine(ap);
2107 if (rc)
2108 return;
2109
2110 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET;
2111 dito = devslp_idle_timeout / (dm + 1);
2112 if (dito > 0x3ff)
2113 dito = 0x3ff;
2114
2115 /* Use the nominal value 10 ms if the read MDAT is zero,
2116 * the nominal value of DETO is 20 ms.
2117 */
2118 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] &
2119 ATA_LOG_DEVSLP_VALID_MASK) {
2120 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] &
2121 ATA_LOG_DEVSLP_MDAT_MASK;
2122 if (!mdat)
2123 mdat = 10;
2124 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO];
2125 if (!deto)
2126 deto = 20;
2127 } else {
2128 mdat = 10;
2129 deto = 20;
2130 }
2131
2132 devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) |
2133 (mdat << PORT_DEVSLP_MDAT_OFFSET) |
2134 (deto << PORT_DEVSLP_DETO_OFFSET) |
2135 PORT_DEVSLP_ADSE);
2136 writel(devslp, port_mmio + PORT_DEVSLP);
2137
2138 hpriv->start_engine(ap);
2139
2140 /* enable device sleep feature for the drive */
2141 err_mask = ata_dev_set_feature(dev,
2142 SETFEATURES_SATA_ENABLE,
2143 SATA_DEVSLP);
2144 if (err_mask && err_mask != AC_ERR_DEV)
2145 ata_dev_warn(dev, "failed to enable DEVSLP\n");
2146 }
2147
2148 static void ahci_enable_fbs(struct ata_port *ap)
2149 {
2150 struct ahci_host_priv *hpriv = ap->host->private_data;
2151 struct ahci_port_priv *pp = ap->private_data;
2152 void __iomem *port_mmio = ahci_port_base(ap);
2153 u32 fbs;
2154 int rc;
2155
2156 if (!pp->fbs_supported)
2157 return;
2158
2159 fbs = readl(port_mmio + PORT_FBS);
2160 if (fbs & PORT_FBS_EN) {
2161 pp->fbs_enabled = true;
2162 pp->fbs_last_dev = -1; /* initialization */
2163 return;
2164 }
2165
2166 rc = ahci_stop_engine(ap);
2167 if (rc)
2168 return;
2169
2170 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS);
2171 fbs = readl(port_mmio + PORT_FBS);
2172 if (fbs & PORT_FBS_EN) {
2173 dev_info(ap->host->dev, "FBS is enabled\n");
2174 pp->fbs_enabled = true;
2175 pp->fbs_last_dev = -1; /* initialization */
2176 } else
2177 dev_err(ap->host->dev, "Failed to enable FBS\n");
2178
2179 hpriv->start_engine(ap);
2180 }
2181
2182 static void ahci_disable_fbs(struct ata_port *ap)
2183 {
2184 struct ahci_host_priv *hpriv = ap->host->private_data;
2185 struct ahci_port_priv *pp = ap->private_data;
2186 void __iomem *port_mmio = ahci_port_base(ap);
2187 u32 fbs;
2188 int rc;
2189
2190 if (!pp->fbs_supported)
2191 return;
2192
2193 fbs = readl(port_mmio + PORT_FBS);
2194 if ((fbs & PORT_FBS_EN) == 0) {
2195 pp->fbs_enabled = false;
2196 return;
2197 }
2198
2199 rc = ahci_stop_engine(ap);
2200 if (rc)
2201 return;
2202
2203 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS);
2204 fbs = readl(port_mmio + PORT_FBS);
2205 if (fbs & PORT_FBS_EN)
2206 dev_err(ap->host->dev, "Failed to disable FBS\n");
2207 else {
2208 dev_info(ap->host->dev, "FBS is disabled\n");
2209 pp->fbs_enabled = false;
2210 }
2211
2212 hpriv->start_engine(ap);
2213 }
2214
2215 static void ahci_pmp_attach(struct ata_port *ap)
2216 {
2217 void __iomem *port_mmio = ahci_port_base(ap);
2218 struct ahci_port_priv *pp = ap->private_data;
2219 u32 cmd;
2220
2221 cmd = readl(port_mmio + PORT_CMD);
2222 cmd |= PORT_CMD_PMP;
2223 writel(cmd, port_mmio + PORT_CMD);
2224
2225 ahci_enable_fbs(ap);
2226
2227 pp->intr_mask |= PORT_IRQ_BAD_PMP;
2228
2229 /*
2230 * We must not change the port interrupt mask register if the
2231 * port is marked frozen, the value in pp->intr_mask will be
2232 * restored later when the port is thawed.
2233 *
2234 * Note that during initialization, the port is marked as
2235 * frozen since the irq handler is not yet registered.
2236 */
2237 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2238 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2239 }
2240
2241 static void ahci_pmp_detach(struct ata_port *ap)
2242 {
2243 void __iomem *port_mmio = ahci_port_base(ap);
2244 struct ahci_port_priv *pp = ap->private_data;
2245 u32 cmd;
2246
2247 ahci_disable_fbs(ap);
2248
2249 cmd = readl(port_mmio + PORT_CMD);
2250 cmd &= ~PORT_CMD_PMP;
2251 writel(cmd, port_mmio + PORT_CMD);
2252
2253 pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
2254
2255 /* see comment above in ahci_pmp_attach() */
2256 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2257 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2258 }
2259
2260 int ahci_port_resume(struct ata_port *ap)
2261 {
2262 ahci_rpm_get_port(ap);
2263
2264 ahci_power_up(ap);
2265 ahci_start_port(ap);
2266
2267 if (sata_pmp_attached(ap))
2268 ahci_pmp_attach(ap);
2269 else
2270 ahci_pmp_detach(ap);
2271
2272 return 0;
2273 }
2274 EXPORT_SYMBOL_GPL(ahci_port_resume);
2275
2276 #ifdef CONFIG_PM
2277 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
2278 {
2279 const char *emsg = NULL;
2280 int rc;
2281
2282 rc = ahci_deinit_port(ap, &emsg);
2283 if (rc == 0)
2284 ahci_power_down(ap);
2285 else {
2286 ata_port_err(ap, "%s (%d)\n", emsg, rc);
2287 ata_port_freeze(ap);
2288 }
2289
2290 ahci_rpm_put_port(ap);
2291 return rc;
2292 }
2293 #endif
2294
2295 static int ahci_port_start(struct ata_port *ap)
2296 {
2297 struct ahci_host_priv *hpriv = ap->host->private_data;
2298 struct device *dev = ap->host->dev;
2299 struct ahci_port_priv *pp;
2300 void *mem;
2301 dma_addr_t mem_dma;
2302 size_t dma_sz, rx_fis_sz;
2303
2304 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
2305 if (!pp)
2306 return -ENOMEM;
2307
2308 if (ap->host->n_ports > 1) {
2309 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL);
2310 if (!pp->irq_desc) {
2311 devm_kfree(dev, pp);
2312 return -ENOMEM;
2313 }
2314 snprintf(pp->irq_desc, 8,
2315 "%s%d", dev_driver_string(dev), ap->port_no);
2316 }
2317
2318 /* check FBS capability */
2319 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) {
2320 void __iomem *port_mmio = ahci_port_base(ap);
2321 u32 cmd = readl(port_mmio + PORT_CMD);
2322 if (cmd & PORT_CMD_FBSCP)
2323 pp->fbs_supported = true;
2324 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) {
2325 dev_info(dev, "port %d can do FBS, forcing FBSCP\n",
2326 ap->port_no);
2327 pp->fbs_supported = true;
2328 } else
2329 dev_warn(dev, "port %d is not capable of FBS\n",
2330 ap->port_no);
2331 }
2332
2333 if (pp->fbs_supported) {
2334 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ;
2335 rx_fis_sz = AHCI_RX_FIS_SZ * 16;
2336 } else {
2337 dma_sz = AHCI_PORT_PRIV_DMA_SZ;
2338 rx_fis_sz = AHCI_RX_FIS_SZ;
2339 }
2340
2341 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL);
2342 if (!mem)
2343 return -ENOMEM;
2344 memset(mem, 0, dma_sz);
2345
2346 /*
2347 * First item in chunk of DMA memory: 32-slot command table,
2348 * 32 bytes each in size
2349 */
2350 pp->cmd_slot = mem;
2351 pp->cmd_slot_dma = mem_dma;
2352
2353 mem += AHCI_CMD_SLOT_SZ;
2354 mem_dma += AHCI_CMD_SLOT_SZ;
2355
2356 /*
2357 * Second item: Received-FIS area
2358 */
2359 pp->rx_fis = mem;
2360 pp->rx_fis_dma = mem_dma;
2361
2362 mem += rx_fis_sz;
2363 mem_dma += rx_fis_sz;
2364
2365 /*
2366 * Third item: data area for storing a single command
2367 * and its scatter-gather table
2368 */
2369 pp->cmd_tbl = mem;
2370 pp->cmd_tbl_dma = mem_dma;
2371
2372 /*
2373 * Save off initial list of interrupts to be enabled.
2374 * This could be changed later
2375 */
2376 pp->intr_mask = DEF_PORT_IRQ;
2377
2378 /*
2379 * Switch to per-port locking in case each port has its own MSI vector.
2380 */
2381 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2382 spin_lock_init(&pp->lock);
2383 ap->lock = &pp->lock;
2384 }
2385
2386 ap->private_data = pp;
2387
2388 /* engage engines, captain */
2389 return ahci_port_resume(ap);
2390 }
2391
2392 static void ahci_port_stop(struct ata_port *ap)
2393 {
2394 const char *emsg = NULL;
2395 struct ahci_host_priv *hpriv = ap->host->private_data;
2396 void __iomem *host_mmio = hpriv->mmio;
2397 int rc;
2398
2399 /* de-initialize port */
2400 rc = ahci_deinit_port(ap, &emsg);
2401 if (rc)
2402 ata_port_warn(ap, "%s (%d)\n", emsg, rc);
2403
2404 /*
2405 * Clear GHC.IS to prevent stuck INTx after disabling MSI and
2406 * re-enabling INTx.
2407 */
2408 writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT);
2409 }
2410
2411 void ahci_print_info(struct ata_host *host, const char *scc_s)
2412 {
2413 struct ahci_host_priv *hpriv = host->private_data;
2414 u32 vers, cap, cap2, impl, speed;
2415 const char *speed_s;
2416
2417 vers = hpriv->version;
2418 cap = hpriv->cap;
2419 cap2 = hpriv->cap2;
2420 impl = hpriv->port_map;
2421
2422 speed = (cap >> 20) & 0xf;
2423 if (speed == 1)
2424 speed_s = "1.5";
2425 else if (speed == 2)
2426 speed_s = "3";
2427 else if (speed == 3)
2428 speed_s = "6";
2429 else
2430 speed_s = "?";
2431
2432 dev_info(host->dev,
2433 "AHCI %02x%02x.%02x%02x "
2434 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2435 ,
2436
2437 (vers >> 24) & 0xff,
2438 (vers >> 16) & 0xff,
2439 (vers >> 8) & 0xff,
2440 vers & 0xff,
2441
2442 ((cap >> 8) & 0x1f) + 1,
2443 (cap & 0x1f) + 1,
2444 speed_s,
2445 impl,
2446 scc_s);
2447
2448 dev_info(host->dev,
2449 "flags: "
2450 "%s%s%s%s%s%s%s"
2451 "%s%s%s%s%s%s%s"
2452 "%s%s%s%s%s%s%s"
2453 "%s%s\n"
2454 ,
2455
2456 cap & HOST_CAP_64 ? "64bit " : "",
2457 cap & HOST_CAP_NCQ ? "ncq " : "",
2458 cap & HOST_CAP_SNTF ? "sntf " : "",
2459 cap & HOST_CAP_MPS ? "ilck " : "",
2460 cap & HOST_CAP_SSS ? "stag " : "",
2461 cap & HOST_CAP_ALPM ? "pm " : "",
2462 cap & HOST_CAP_LED ? "led " : "",
2463 cap & HOST_CAP_CLO ? "clo " : "",
2464 cap & HOST_CAP_ONLY ? "only " : "",
2465 cap & HOST_CAP_PMP ? "pmp " : "",
2466 cap & HOST_CAP_FBS ? "fbs " : "",
2467 cap & HOST_CAP_PIO_MULTI ? "pio " : "",
2468 cap & HOST_CAP_SSC ? "slum " : "",
2469 cap & HOST_CAP_PART ? "part " : "",
2470 cap & HOST_CAP_CCC ? "ccc " : "",
2471 cap & HOST_CAP_EMS ? "ems " : "",
2472 cap & HOST_CAP_SXS ? "sxs " : "",
2473 cap2 & HOST_CAP2_DESO ? "deso " : "",
2474 cap2 & HOST_CAP2_SADM ? "sadm " : "",
2475 cap2 & HOST_CAP2_SDS ? "sds " : "",
2476 cap2 & HOST_CAP2_APST ? "apst " : "",
2477 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "",
2478 cap2 & HOST_CAP2_BOH ? "boh " : ""
2479 );
2480 }
2481 EXPORT_SYMBOL_GPL(ahci_print_info);
2482
2483 void ahci_set_em_messages(struct ahci_host_priv *hpriv,
2484 struct ata_port_info *pi)
2485 {
2486 u8 messages;
2487 void __iomem *mmio = hpriv->mmio;
2488 u32 em_loc = readl(mmio + HOST_EM_LOC);
2489 u32 em_ctl = readl(mmio + HOST_EM_CTL);
2490
2491 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS))
2492 return;
2493
2494 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16;
2495
2496 if (messages) {
2497 /* store em_loc */
2498 hpriv->em_loc = ((em_loc >> 16) * 4);
2499 hpriv->em_buf_sz = ((em_loc & 0xff) * 4);
2500 hpriv->em_msg_type = messages;
2501 pi->flags |= ATA_FLAG_EM;
2502 if (!(em_ctl & EM_CTL_ALHD))
2503 pi->flags |= ATA_FLAG_SW_ACTIVITY;
2504 }
2505 }
2506 EXPORT_SYMBOL_GPL(ahci_set_em_messages);
2507
2508 static int ahci_host_activate_multi_irqs(struct ata_host *host,
2509 struct scsi_host_template *sht)
2510 {
2511 struct ahci_host_priv *hpriv = host->private_data;
2512 int i, rc;
2513
2514 rc = ata_host_start(host);
2515 if (rc)
2516 return rc;
2517 /*
2518 * Requests IRQs according to AHCI-1.1 when multiple MSIs were
2519 * allocated. That is one MSI per port, starting from @irq.
2520 */
2521 for (i = 0; i < host->n_ports; i++) {
2522 struct ahci_port_priv *pp = host->ports[i]->private_data;
2523 int irq = hpriv->get_irq_vector(host, i);
2524
2525 /* Do not receive interrupts sent by dummy ports */
2526 if (!pp) {
2527 disable_irq(irq);
2528 continue;
2529 }
2530
2531 rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard,
2532 0, pp->irq_desc, host->ports[i]);
2533
2534 if (rc)
2535 return rc;
2536 ata_port_desc(host->ports[i], "irq %d", irq);
2537 }
2538
2539 return ata_host_register(host, sht);
2540 }
2541
2542 /**
2543 * ahci_host_activate - start AHCI host, request IRQs and register it
2544 * @host: target ATA host
2545 * @sht: scsi_host_template to use when registering the host
2546 *
2547 * LOCKING:
2548 * Inherited from calling layer (may sleep).
2549 *
2550 * RETURNS:
2551 * 0 on success, -errno otherwise.
2552 */
2553 int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht)
2554 {
2555 struct ahci_host_priv *hpriv = host->private_data;
2556 int irq = hpriv->irq;
2557 int rc;
2558
2559 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2560 if (hpriv->irq_handler)
2561 dev_warn(host->dev,
2562 "both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented\n");
2563 if (!hpriv->get_irq_vector) {
2564 dev_err(host->dev,
2565 "AHCI_HFLAG_MULTI_MSI requires ->get_irq_vector!\n");
2566 return -EIO;
2567 }
2568
2569 rc = ahci_host_activate_multi_irqs(host, sht);
2570 } else {
2571 rc = ata_host_activate(host, irq, hpriv->irq_handler,
2572 IRQF_SHARED, sht);
2573 }
2574
2575
2576 return rc;
2577 }
2578 EXPORT_SYMBOL_GPL(ahci_host_activate);
2579
2580 MODULE_AUTHOR("Jeff Garzik");
2581 MODULE_DESCRIPTION("Common AHCI SATA low-level routines");
2582 MODULE_LICENSE("GPL");
Linux with added FPC-III support