1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libahci.c - Common AHCI SATA low-level routines
5 * Maintained by: Tejun Heo <tj@kernel.org>
6 * Please ALWAYS copy linux-ide@vger.kernel.org
9 * Copyright 2004-2005 Red Hat, Inc.
11 * libata documentation is available via 'make {ps|pdf}docs',
12 * as Documentation/driver-api/libata.rst
14 * AHCI hardware documentation:
15 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
16 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
19 #include <linux/kernel.h>
20 #include <linux/gfp.h>
21 #include <linux/module.h>
22 #include <linux/nospec.h>
23 #include <linux/blkdev.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/device.h>
28 #include <scsi/scsi_host.h>
29 #include <scsi/scsi_cmnd.h>
30 #include <linux/libata.h>
31 #include <linux/pci.h>
35 static int ahci_skip_host_reset;
37 EXPORT_SYMBOL_GPL(ahci_ignore_sss);
39 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444);
40 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)");
42 module_param_named(ignore_sss, ahci_ignore_sss, int, 0444);
43 MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)");
45 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
47 static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
48 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
50 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
55 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
56 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
57 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
58 static int ahci_port_start(struct ata_port *ap);
59 static void ahci_port_stop(struct ata_port *ap);
60 static enum ata_completion_errors ahci_qc_prep(struct ata_queued_cmd *qc);
61 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc);
62 static void ahci_freeze(struct ata_port *ap);
63 static void ahci_thaw(struct ata_port *ap);
64 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep);
65 static void ahci_enable_fbs(struct ata_port *ap);
66 static void ahci_disable_fbs(struct ata_port *ap);
67 static void ahci_pmp_attach(struct ata_port *ap);
68 static void ahci_pmp_detach(struct ata_port *ap);
69 static int ahci_softreset(struct ata_link *link, unsigned int *class,
70 unsigned long deadline);
71 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
72 unsigned long deadline);
73 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
74 unsigned long deadline);
75 static void ahci_postreset(struct ata_link *link, unsigned int *class);
76 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
77 static void ahci_dev_config(struct ata_device *dev);
79 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
81 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
82 static ssize_t ahci_activity_store(struct ata_device *dev,
83 enum sw_activity val);
84 static void ahci_init_sw_activity(struct ata_link *link);
86 static ssize_t ahci_show_host_caps(struct device *dev,
87 struct device_attribute *attr, char *buf);
88 static ssize_t ahci_show_host_cap2(struct device *dev,
89 struct device_attribute *attr, char *buf);
90 static ssize_t ahci_show_host_version(struct device *dev,
91 struct device_attribute *attr, char *buf);
92 static ssize_t ahci_show_port_cmd(struct device *dev,
93 struct device_attribute *attr, char *buf);
94 static ssize_t ahci_read_em_buffer(struct device *dev,
95 struct device_attribute *attr, char *buf);
96 static ssize_t ahci_store_em_buffer(struct device *dev,
97 struct device_attribute *attr,
98 const char *buf, size_t size);
99 static ssize_t ahci_show_em_supported(struct device *dev,
100 struct device_attribute *attr, char *buf);
101 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance);
103 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL);
104 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL);
105 static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL);
106 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL);
107 static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO,
108 ahci_read_em_buffer, ahci_store_em_buffer);
109 static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL);
111 static struct attribute *ahci_shost_attrs[] = {
112 &dev_attr_link_power_management_policy.attr,
113 &dev_attr_em_message_type.attr,
114 &dev_attr_em_message.attr,
115 &dev_attr_ahci_host_caps.attr,
116 &dev_attr_ahci_host_cap2.attr,
117 &dev_attr_ahci_host_version.attr,
118 &dev_attr_ahci_port_cmd.attr,
119 &dev_attr_em_buffer.attr,
120 &dev_attr_em_message_supported.attr,
124 static const struct attribute_group ahci_shost_attr_group = {
125 .attrs = ahci_shost_attrs
128 const struct attribute_group *ahci_shost_groups[] = {
129 &ahci_shost_attr_group,
132 EXPORT_SYMBOL_GPL(ahci_shost_groups);
134 static struct attribute *ahci_sdev_attrs[] = {
135 &dev_attr_sw_activity.attr,
136 &dev_attr_unload_heads.attr,
137 &dev_attr_ncq_prio_supported.attr,
138 &dev_attr_ncq_prio_enable.attr,
142 static const struct attribute_group ahci_sdev_attr_group = {
143 .attrs = ahci_sdev_attrs
146 const struct attribute_group *ahci_sdev_groups[] = {
147 &ahci_sdev_attr_group,
150 EXPORT_SYMBOL_GPL(ahci_sdev_groups);
152 struct ata_port_operations ahci_ops = {
153 .inherits = &sata_pmp_port_ops,
155 .qc_defer = ahci_pmp_qc_defer,
156 .qc_prep = ahci_qc_prep,
157 .qc_issue = ahci_qc_issue,
158 .qc_fill_rtf = ahci_qc_fill_rtf,
160 .freeze = ahci_freeze,
162 .softreset = ahci_softreset,
163 .hardreset = ahci_hardreset,
164 .postreset = ahci_postreset,
165 .pmp_softreset = ahci_softreset,
166 .error_handler = ahci_error_handler,
167 .post_internal_cmd = ahci_post_internal_cmd,
168 .dev_config = ahci_dev_config,
170 .scr_read = ahci_scr_read,
171 .scr_write = ahci_scr_write,
172 .pmp_attach = ahci_pmp_attach,
173 .pmp_detach = ahci_pmp_detach,
175 .set_lpm = ahci_set_lpm,
176 .em_show = ahci_led_show,
177 .em_store = ahci_led_store,
178 .sw_activity_show = ahci_activity_show,
179 .sw_activity_store = ahci_activity_store,
180 .transmit_led_message = ahci_transmit_led_message,
182 .port_suspend = ahci_port_suspend,
183 .port_resume = ahci_port_resume,
185 .port_start = ahci_port_start,
186 .port_stop = ahci_port_stop,
188 EXPORT_SYMBOL_GPL(ahci_ops);
190 struct ata_port_operations ahci_pmp_retry_srst_ops = {
191 .inherits = &ahci_ops,
192 .softreset = ahci_pmp_retry_softreset,
194 EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops);
196 static bool ahci_em_messages __read_mostly = true;
197 module_param(ahci_em_messages, bool, 0444);
198 /* add other LED protocol types when they become supported */
199 MODULE_PARM_DESC(ahci_em_messages,
200 "AHCI Enclosure Management Message control (0 = off, 1 = on)");
202 /* device sleep idle timeout in ms */
203 static int devslp_idle_timeout __read_mostly = 1000;
204 module_param(devslp_idle_timeout, int, 0644);
205 MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout");
207 static void ahci_enable_ahci(void __iomem *mmio)
212 /* turn on AHCI_EN */
213 tmp = readl(mmio + HOST_CTL);
214 if (tmp & HOST_AHCI_EN)
217 /* Some controllers need AHCI_EN to be written multiple times.
218 * Try a few times before giving up.
220 for (i = 0; i < 5; i++) {
222 writel(tmp, mmio + HOST_CTL);
223 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */
224 if (tmp & HOST_AHCI_EN)
233 * ahci_rpm_get_port - Make sure the port is powered on
234 * @ap: Port to power on
236 * Whenever there is need to access the AHCI host registers outside of
237 * normal execution paths, call this function to make sure the host is
238 * actually powered on.
240 static int ahci_rpm_get_port(struct ata_port *ap)
242 return pm_runtime_get_sync(ap->dev);
246 * ahci_rpm_put_port - Undoes ahci_rpm_get_port()
247 * @ap: Port to power down
249 * Undoes ahci_rpm_get_port() and possibly powers down the AHCI host
250 * if it has no more active users.
252 static void ahci_rpm_put_port(struct ata_port *ap)
254 pm_runtime_put(ap->dev);
257 static ssize_t ahci_show_host_caps(struct device *dev,
258 struct device_attribute *attr, char *buf)
260 struct Scsi_Host *shost = class_to_shost(dev);
261 struct ata_port *ap = ata_shost_to_port(shost);
262 struct ahci_host_priv *hpriv = ap->host->private_data;
264 return sprintf(buf, "%x\n", hpriv->cap);
267 static ssize_t ahci_show_host_cap2(struct device *dev,
268 struct device_attribute *attr, char *buf)
270 struct Scsi_Host *shost = class_to_shost(dev);
271 struct ata_port *ap = ata_shost_to_port(shost);
272 struct ahci_host_priv *hpriv = ap->host->private_data;
274 return sprintf(buf, "%x\n", hpriv->cap2);
277 static ssize_t ahci_show_host_version(struct device *dev,
278 struct device_attribute *attr, char *buf)
280 struct Scsi_Host *shost = class_to_shost(dev);
281 struct ata_port *ap = ata_shost_to_port(shost);
282 struct ahci_host_priv *hpriv = ap->host->private_data;
284 return sprintf(buf, "%x\n", hpriv->version);
287 static ssize_t ahci_show_port_cmd(struct device *dev,
288 struct device_attribute *attr, char *buf)
290 struct Scsi_Host *shost = class_to_shost(dev);
291 struct ata_port *ap = ata_shost_to_port(shost);
292 void __iomem *port_mmio = ahci_port_base(ap);
295 ahci_rpm_get_port(ap);
296 ret = sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD));
297 ahci_rpm_put_port(ap);
302 static ssize_t ahci_read_em_buffer(struct device *dev,
303 struct device_attribute *attr, char *buf)
305 struct Scsi_Host *shost = class_to_shost(dev);
306 struct ata_port *ap = ata_shost_to_port(shost);
307 struct ahci_host_priv *hpriv = ap->host->private_data;
308 void __iomem *mmio = hpriv->mmio;
309 void __iomem *em_mmio = mmio + hpriv->em_loc;
315 ahci_rpm_get_port(ap);
316 spin_lock_irqsave(ap->lock, flags);
318 em_ctl = readl(mmio + HOST_EM_CTL);
319 if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT ||
320 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) {
321 spin_unlock_irqrestore(ap->lock, flags);
322 ahci_rpm_put_port(ap);
326 if (!(em_ctl & EM_CTL_MR)) {
327 spin_unlock_irqrestore(ap->lock, flags);
328 ahci_rpm_put_port(ap);
332 if (!(em_ctl & EM_CTL_SMB))
333 em_mmio += hpriv->em_buf_sz;
335 count = hpriv->em_buf_sz;
337 /* the count should not be larger than PAGE_SIZE */
338 if (count > PAGE_SIZE) {
339 if (printk_ratelimit())
341 "EM read buffer size too large: "
342 "buffer size %u, page size %lu\n",
343 hpriv->em_buf_sz, PAGE_SIZE);
347 for (i = 0; i < count; i += 4) {
348 msg = readl(em_mmio + i);
350 buf[i + 1] = (msg >> 8) & 0xff;
351 buf[i + 2] = (msg >> 16) & 0xff;
352 buf[i + 3] = (msg >> 24) & 0xff;
355 spin_unlock_irqrestore(ap->lock, flags);
356 ahci_rpm_put_port(ap);
361 static ssize_t ahci_store_em_buffer(struct device *dev,
362 struct device_attribute *attr,
363 const char *buf, size_t size)
365 struct Scsi_Host *shost = class_to_shost(dev);
366 struct ata_port *ap = ata_shost_to_port(shost);
367 struct ahci_host_priv *hpriv = ap->host->private_data;
368 void __iomem *mmio = hpriv->mmio;
369 void __iomem *em_mmio = mmio + hpriv->em_loc;
370 const unsigned char *msg_buf = buf;
375 /* check size validity */
376 if (!(ap->flags & ATA_FLAG_EM) ||
377 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) ||
378 size % 4 || size > hpriv->em_buf_sz)
381 ahci_rpm_get_port(ap);
382 spin_lock_irqsave(ap->lock, flags);
384 em_ctl = readl(mmio + HOST_EM_CTL);
385 if (em_ctl & EM_CTL_TM) {
386 spin_unlock_irqrestore(ap->lock, flags);
387 ahci_rpm_put_port(ap);
391 for (i = 0; i < size; i += 4) {
392 msg = msg_buf[i] | msg_buf[i + 1] << 8 |
393 msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24;
394 writel(msg, em_mmio + i);
397 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
399 spin_unlock_irqrestore(ap->lock, flags);
400 ahci_rpm_put_port(ap);
405 static ssize_t ahci_show_em_supported(struct device *dev,
406 struct device_attribute *attr, char *buf)
408 struct Scsi_Host *shost = class_to_shost(dev);
409 struct ata_port *ap = ata_shost_to_port(shost);
410 struct ahci_host_priv *hpriv = ap->host->private_data;
411 void __iomem *mmio = hpriv->mmio;
414 ahci_rpm_get_port(ap);
415 em_ctl = readl(mmio + HOST_EM_CTL);
416 ahci_rpm_put_port(ap);
418 return sprintf(buf, "%s%s%s%s\n",
419 em_ctl & EM_CTL_LED ? "led " : "",
420 em_ctl & EM_CTL_SAFTE ? "saf-te " : "",
421 em_ctl & EM_CTL_SES ? "ses-2 " : "",
422 em_ctl & EM_CTL_SGPIO ? "sgpio " : "");
426 * ahci_save_initial_config - Save and fixup initial config values
427 * @dev: target AHCI device
428 * @hpriv: host private area to store config values
430 * Some registers containing configuration info might be setup by
431 * BIOS and might be cleared on reset. This function saves the
432 * initial values of those registers into @hpriv such that they
433 * can be restored after controller reset.
435 * If inconsistent, config values are fixed up by this function.
437 * If it is not set already this function sets hpriv->start_engine to
443 void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv)
445 void __iomem *mmio = hpriv->mmio;
446 u32 cap, cap2, vers, port_map;
449 /* make sure AHCI mode is enabled before accessing CAP */
450 ahci_enable_ahci(mmio);
452 /* Values prefixed with saved_ are written back to host after
453 * reset. Values without are used for driver operation.
455 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
456 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
458 /* CAP2 register is only defined for AHCI 1.2 and later */
459 vers = readl(mmio + HOST_VERSION);
460 if ((vers >> 16) > 1 ||
461 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200))
462 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2);
464 hpriv->saved_cap2 = cap2 = 0;
466 /* some chips have errata preventing 64bit use */
467 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
468 dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n");
472 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
473 dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n");
474 cap &= ~HOST_CAP_NCQ;
477 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) {
478 dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n");
482 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
483 dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n");
484 cap &= ~HOST_CAP_PMP;
487 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) {
489 "controller can't do SNTF, turning off CAP_SNTF\n");
490 cap &= ~HOST_CAP_SNTF;
493 if ((cap2 & HOST_CAP2_SDS) && (hpriv->flags & AHCI_HFLAG_NO_DEVSLP)) {
495 "controller can't do DEVSLP, turning off\n");
496 cap2 &= ~HOST_CAP2_SDS;
497 cap2 &= ~HOST_CAP2_SADM;
500 if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) {
501 dev_info(dev, "controller can do FBS, turning on CAP_FBS\n");
505 if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) {
506 dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n");
507 cap &= ~HOST_CAP_FBS;
510 if (!(cap & HOST_CAP_ALPM) && (hpriv->flags & AHCI_HFLAG_YES_ALPM)) {
511 dev_info(dev, "controller can do ALPM, turning on CAP_ALPM\n");
512 cap |= HOST_CAP_ALPM;
515 if ((cap & HOST_CAP_SXS) && (hpriv->flags & AHCI_HFLAG_NO_SXS)) {
516 dev_info(dev, "controller does not support SXS, disabling CAP_SXS\n");
517 cap &= ~HOST_CAP_SXS;
520 if (hpriv->force_port_map && port_map != hpriv->force_port_map) {
521 dev_info(dev, "forcing port_map 0x%x -> 0x%x\n",
522 port_map, hpriv->force_port_map);
523 port_map = hpriv->force_port_map;
524 hpriv->saved_port_map = port_map;
527 if (hpriv->mask_port_map) {
528 dev_warn(dev, "masking port_map 0x%x -> 0x%x\n",
530 port_map & hpriv->mask_port_map);
531 port_map &= hpriv->mask_port_map;
534 /* cross check port_map and cap.n_ports */
538 for (i = 0; i < AHCI_MAX_PORTS; i++)
539 if (port_map & (1 << i))
542 /* If PI has more ports than n_ports, whine, clear
543 * port_map and let it be generated from n_ports.
545 if (map_ports > ahci_nr_ports(cap)) {
547 "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n",
548 port_map, ahci_nr_ports(cap));
553 /* fabricate port_map from cap.nr_ports for < AHCI 1.3 */
554 if (!port_map && vers < 0x10300) {
555 port_map = (1 << ahci_nr_ports(cap)) - 1;
556 dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map);
558 /* write the fixed up value to the PI register */
559 hpriv->saved_port_map = port_map;
562 /* record values to use during operation */
565 hpriv->version = readl(mmio + HOST_VERSION);
566 hpriv->port_map = port_map;
568 if (!hpriv->start_engine)
569 hpriv->start_engine = ahci_start_engine;
571 if (!hpriv->stop_engine)
572 hpriv->stop_engine = ahci_stop_engine;
574 if (!hpriv->irq_handler)
575 hpriv->irq_handler = ahci_single_level_irq_intr;
577 EXPORT_SYMBOL_GPL(ahci_save_initial_config);
580 * ahci_restore_initial_config - Restore initial config
581 * @host: target ATA host
583 * Restore initial config stored by ahci_save_initial_config().
588 static void ahci_restore_initial_config(struct ata_host *host)
590 struct ahci_host_priv *hpriv = host->private_data;
591 void __iomem *mmio = hpriv->mmio;
593 writel(hpriv->saved_cap, mmio + HOST_CAP);
594 if (hpriv->saved_cap2)
595 writel(hpriv->saved_cap2, mmio + HOST_CAP2);
596 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
597 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
600 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
602 static const int offset[] = {
603 [SCR_STATUS] = PORT_SCR_STAT,
604 [SCR_CONTROL] = PORT_SCR_CTL,
605 [SCR_ERROR] = PORT_SCR_ERR,
606 [SCR_ACTIVE] = PORT_SCR_ACT,
607 [SCR_NOTIFICATION] = PORT_SCR_NTF,
609 struct ahci_host_priv *hpriv = ap->host->private_data;
611 if (sc_reg < ARRAY_SIZE(offset) &&
612 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
613 return offset[sc_reg];
617 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
619 void __iomem *port_mmio = ahci_port_base(link->ap);
620 int offset = ahci_scr_offset(link->ap, sc_reg);
623 *val = readl(port_mmio + offset);
629 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
631 void __iomem *port_mmio = ahci_port_base(link->ap);
632 int offset = ahci_scr_offset(link->ap, sc_reg);
635 writel(val, port_mmio + offset);
641 void ahci_start_engine(struct ata_port *ap)
643 void __iomem *port_mmio = ahci_port_base(ap);
647 tmp = readl(port_mmio + PORT_CMD);
648 tmp |= PORT_CMD_START;
649 writel(tmp, port_mmio + PORT_CMD);
650 readl(port_mmio + PORT_CMD); /* flush */
652 EXPORT_SYMBOL_GPL(ahci_start_engine);
654 int ahci_stop_engine(struct ata_port *ap)
656 void __iomem *port_mmio = ahci_port_base(ap);
657 struct ahci_host_priv *hpriv = ap->host->private_data;
661 * On some controllers, stopping a port's DMA engine while the port
662 * is in ALPM state (partial or slumber) results in failures on
663 * subsequent DMA engine starts. For those controllers, put the
664 * port back in active state before stopping its DMA engine.
666 if ((hpriv->flags & AHCI_HFLAG_WAKE_BEFORE_STOP) &&
667 (ap->link.lpm_policy > ATA_LPM_MAX_POWER) &&
668 ahci_set_lpm(&ap->link, ATA_LPM_MAX_POWER, ATA_LPM_WAKE_ONLY)) {
669 dev_err(ap->host->dev, "Failed to wake up port before engine stop\n");
673 tmp = readl(port_mmio + PORT_CMD);
675 /* check if the HBA is idle */
676 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
680 * Don't try to issue commands but return with ENODEV if the
681 * AHCI controller not available anymore (e.g. due to PCIe hot
682 * unplugging). Otherwise a 500ms delay for each port is added.
684 if (tmp == 0xffffffff) {
685 dev_err(ap->host->dev, "AHCI controller unavailable!\n");
689 /* setting HBA to idle */
690 tmp &= ~PORT_CMD_START;
691 writel(tmp, port_mmio + PORT_CMD);
693 /* wait for engine to stop. This could be as long as 500 msec */
694 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
695 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
696 if (tmp & PORT_CMD_LIST_ON)
701 EXPORT_SYMBOL_GPL(ahci_stop_engine);
703 void ahci_start_fis_rx(struct ata_port *ap)
705 void __iomem *port_mmio = ahci_port_base(ap);
706 struct ahci_host_priv *hpriv = ap->host->private_data;
707 struct ahci_port_priv *pp = ap->private_data;
710 /* set FIS registers */
711 if (hpriv->cap & HOST_CAP_64)
712 writel((pp->cmd_slot_dma >> 16) >> 16,
713 port_mmio + PORT_LST_ADDR_HI);
714 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
716 if (hpriv->cap & HOST_CAP_64)
717 writel((pp->rx_fis_dma >> 16) >> 16,
718 port_mmio + PORT_FIS_ADDR_HI);
719 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
721 /* enable FIS reception */
722 tmp = readl(port_mmio + PORT_CMD);
723 tmp |= PORT_CMD_FIS_RX;
724 writel(tmp, port_mmio + PORT_CMD);
727 readl(port_mmio + PORT_CMD);
729 EXPORT_SYMBOL_GPL(ahci_start_fis_rx);
731 static int ahci_stop_fis_rx(struct ata_port *ap)
733 void __iomem *port_mmio = ahci_port_base(ap);
736 /* disable FIS reception */
737 tmp = readl(port_mmio + PORT_CMD);
738 tmp &= ~PORT_CMD_FIS_RX;
739 writel(tmp, port_mmio + PORT_CMD);
741 /* wait for completion, spec says 500ms, give it 1000 */
742 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
743 PORT_CMD_FIS_ON, 10, 1000);
744 if (tmp & PORT_CMD_FIS_ON)
750 static void ahci_power_up(struct ata_port *ap)
752 struct ahci_host_priv *hpriv = ap->host->private_data;
753 void __iomem *port_mmio = ahci_port_base(ap);
756 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
759 if (hpriv->cap & HOST_CAP_SSS) {
760 cmd |= PORT_CMD_SPIN_UP;
761 writel(cmd, port_mmio + PORT_CMD);
765 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
768 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
771 struct ata_port *ap = link->ap;
772 struct ahci_host_priv *hpriv = ap->host->private_data;
773 struct ahci_port_priv *pp = ap->private_data;
774 void __iomem *port_mmio = ahci_port_base(ap);
776 if (policy != ATA_LPM_MAX_POWER) {
777 /* wakeup flag only applies to the max power policy */
778 hints &= ~ATA_LPM_WAKE_ONLY;
781 * Disable interrupts on Phy Ready. This keeps us from
782 * getting woken up due to spurious phy ready
785 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
786 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
788 sata_link_scr_lpm(link, policy, false);
791 if (hpriv->cap & HOST_CAP_ALPM) {
792 u32 cmd = readl(port_mmio + PORT_CMD);
794 if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) {
795 if (!(hints & ATA_LPM_WAKE_ONLY))
796 cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE);
797 cmd |= PORT_CMD_ICC_ACTIVE;
799 writel(cmd, port_mmio + PORT_CMD);
800 readl(port_mmio + PORT_CMD);
802 /* wait 10ms to be sure we've come out of LPM state */
805 if (hints & ATA_LPM_WAKE_ONLY)
808 cmd |= PORT_CMD_ALPE;
809 if (policy == ATA_LPM_MIN_POWER)
811 else if (policy == ATA_LPM_MIN_POWER_WITH_PARTIAL)
812 cmd &= ~PORT_CMD_ASP;
814 /* write out new cmd value */
815 writel(cmd, port_mmio + PORT_CMD);
819 /* set aggressive device sleep */
820 if ((hpriv->cap2 & HOST_CAP2_SDS) &&
821 (hpriv->cap2 & HOST_CAP2_SADM) &&
822 (link->device->flags & ATA_DFLAG_DEVSLP)) {
823 if (policy == ATA_LPM_MIN_POWER ||
824 policy == ATA_LPM_MIN_POWER_WITH_PARTIAL)
825 ahci_set_aggressive_devslp(ap, true);
827 ahci_set_aggressive_devslp(ap, false);
830 if (policy == ATA_LPM_MAX_POWER) {
831 sata_link_scr_lpm(link, policy, false);
833 /* turn PHYRDY IRQ back on */
834 pp->intr_mask |= PORT_IRQ_PHYRDY;
835 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
842 static void ahci_power_down(struct ata_port *ap)
844 struct ahci_host_priv *hpriv = ap->host->private_data;
845 void __iomem *port_mmio = ahci_port_base(ap);
848 if (!(hpriv->cap & HOST_CAP_SSS))
851 /* put device into listen mode, first set PxSCTL.DET to 0 */
852 scontrol = readl(port_mmio + PORT_SCR_CTL);
854 writel(scontrol, port_mmio + PORT_SCR_CTL);
856 /* then set PxCMD.SUD to 0 */
857 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
858 cmd &= ~PORT_CMD_SPIN_UP;
859 writel(cmd, port_mmio + PORT_CMD);
863 static void ahci_start_port(struct ata_port *ap)
865 struct ahci_host_priv *hpriv = ap->host->private_data;
866 struct ahci_port_priv *pp = ap->private_data;
867 struct ata_link *link;
868 struct ahci_em_priv *emp;
872 /* enable FIS reception */
873 ahci_start_fis_rx(ap);
876 if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE))
877 hpriv->start_engine(ap);
880 if (ap->flags & ATA_FLAG_EM) {
881 ata_for_each_link(link, ap, EDGE) {
882 emp = &pp->em_priv[link->pmp];
884 /* EM Transmit bit maybe busy during init */
885 for (i = 0; i < EM_MAX_RETRY; i++) {
886 rc = ap->ops->transmit_led_message(ap,
890 * If busy, give a breather but do not
891 * release EH ownership by using msleep()
892 * instead of ata_msleep(). EM Transmit
893 * bit is busy for the whole host and
894 * releasing ownership will cause other
895 * ports to fail the same way.
905 if (ap->flags & ATA_FLAG_SW_ACTIVITY)
906 ata_for_each_link(link, ap, EDGE)
907 ahci_init_sw_activity(link);
911 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
914 struct ahci_host_priv *hpriv = ap->host->private_data;
917 rc = hpriv->stop_engine(ap);
919 *emsg = "failed to stop engine";
923 /* disable FIS reception */
924 rc = ahci_stop_fis_rx(ap);
926 *emsg = "failed stop FIS RX";
933 int ahci_reset_controller(struct ata_host *host)
935 struct ahci_host_priv *hpriv = host->private_data;
936 void __iomem *mmio = hpriv->mmio;
939 /* we must be in AHCI mode, before using anything
940 * AHCI-specific, such as HOST_RESET.
942 ahci_enable_ahci(mmio);
944 /* global controller reset */
945 if (!ahci_skip_host_reset) {
946 tmp = readl(mmio + HOST_CTL);
947 if ((tmp & HOST_RESET) == 0) {
948 writel(tmp | HOST_RESET, mmio + HOST_CTL);
949 readl(mmio + HOST_CTL); /* flush */
953 * to perform host reset, OS should set HOST_RESET
954 * and poll until this bit is read to be "0".
955 * reset must complete within 1 second, or
956 * the hardware should be considered fried.
958 tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET,
959 HOST_RESET, 10, 1000);
961 if (tmp & HOST_RESET) {
962 dev_err(host->dev, "controller reset failed (0x%x)\n",
967 /* turn on AHCI mode */
968 ahci_enable_ahci(mmio);
970 /* Some registers might be cleared on reset. Restore
973 if (!(hpriv->flags & AHCI_HFLAG_NO_WRITE_TO_RO))
974 ahci_restore_initial_config(host);
976 dev_info(host->dev, "skipping global host reset\n");
980 EXPORT_SYMBOL_GPL(ahci_reset_controller);
982 static void ahci_sw_activity(struct ata_link *link)
984 struct ata_port *ap = link->ap;
985 struct ahci_port_priv *pp = ap->private_data;
986 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
988 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
992 if (!timer_pending(&emp->timer))
993 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
996 static void ahci_sw_activity_blink(struct timer_list *t)
998 struct ahci_em_priv *emp = from_timer(emp, t, timer);
999 struct ata_link *link = emp->link;
1000 struct ata_port *ap = link->ap;
1002 unsigned long led_message = emp->led_state;
1003 u32 activity_led_state;
1004 unsigned long flags;
1006 led_message &= EM_MSG_LED_VALUE;
1007 led_message |= ap->port_no | (link->pmp << 8);
1009 /* check to see if we've had activity. If so,
1010 * toggle state of LED and reset timer. If not,
1011 * turn LED to desired idle state.
1013 spin_lock_irqsave(ap->lock, flags);
1014 if (emp->saved_activity != emp->activity) {
1015 emp->saved_activity = emp->activity;
1016 /* get the current LED state */
1017 activity_led_state = led_message & EM_MSG_LED_VALUE_ON;
1019 if (activity_led_state)
1020 activity_led_state = 0;
1022 activity_led_state = 1;
1024 /* clear old state */
1025 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1028 led_message |= (activity_led_state << 16);
1029 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
1031 /* switch to idle */
1032 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1033 if (emp->blink_policy == BLINK_OFF)
1034 led_message |= (1 << 16);
1036 spin_unlock_irqrestore(ap->lock, flags);
1037 ap->ops->transmit_led_message(ap, led_message, 4);
1040 static void ahci_init_sw_activity(struct ata_link *link)
1042 struct ata_port *ap = link->ap;
1043 struct ahci_port_priv *pp = ap->private_data;
1044 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1046 /* init activity stats, setup timer */
1047 emp->saved_activity = emp->activity = 0;
1049 timer_setup(&emp->timer, ahci_sw_activity_blink, 0);
1051 /* check our blink policy and set flag for link if it's enabled */
1052 if (emp->blink_policy)
1053 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1056 int ahci_reset_em(struct ata_host *host)
1058 struct ahci_host_priv *hpriv = host->private_data;
1059 void __iomem *mmio = hpriv->mmio;
1062 em_ctl = readl(mmio + HOST_EM_CTL);
1063 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
1066 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
1069 EXPORT_SYMBOL_GPL(ahci_reset_em);
1071 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
1074 struct ahci_host_priv *hpriv = ap->host->private_data;
1075 struct ahci_port_priv *pp = ap->private_data;
1076 void __iomem *mmio = hpriv->mmio;
1078 u32 message[] = {0, 0};
1079 unsigned long flags;
1081 struct ahci_em_priv *emp;
1083 /* get the slot number from the message */
1084 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1085 if (pmp < EM_MAX_SLOTS)
1086 emp = &pp->em_priv[pmp];
1090 ahci_rpm_get_port(ap);
1091 spin_lock_irqsave(ap->lock, flags);
1094 * if we are still busy transmitting a previous message,
1097 em_ctl = readl(mmio + HOST_EM_CTL);
1098 if (em_ctl & EM_CTL_TM) {
1099 spin_unlock_irqrestore(ap->lock, flags);
1100 ahci_rpm_put_port(ap);
1104 if (hpriv->em_msg_type & EM_MSG_TYPE_LED) {
1106 * create message header - this is all zero except for
1107 * the message size, which is 4 bytes.
1109 message[0] |= (4 << 8);
1111 /* ignore 0:4 of byte zero, fill in port info yourself */
1112 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no);
1114 /* write message to EM_LOC */
1115 writel(message[0], mmio + hpriv->em_loc);
1116 writel(message[1], mmio + hpriv->em_loc+4);
1119 * tell hardware to transmit the message
1121 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
1124 /* save off new led state for port/slot */
1125 emp->led_state = state;
1127 spin_unlock_irqrestore(ap->lock, flags);
1128 ahci_rpm_put_port(ap);
1133 static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
1135 struct ahci_port_priv *pp = ap->private_data;
1136 struct ata_link *link;
1137 struct ahci_em_priv *emp;
1140 ata_for_each_link(link, ap, EDGE) {
1141 emp = &pp->em_priv[link->pmp];
1142 rc += sprintf(buf, "%lx\n", emp->led_state);
1147 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
1152 struct ahci_port_priv *pp = ap->private_data;
1153 struct ahci_em_priv *emp;
1155 if (kstrtouint(buf, 0, &state) < 0)
1158 /* get the slot number from the message */
1159 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1160 if (pmp < EM_MAX_SLOTS) {
1161 pmp = array_index_nospec(pmp, EM_MAX_SLOTS);
1162 emp = &pp->em_priv[pmp];
1167 /* mask off the activity bits if we are in sw_activity
1168 * mode, user should turn off sw_activity before setting
1169 * activity led through em_message
1171 if (emp->blink_policy)
1172 state &= ~EM_MSG_LED_VALUE_ACTIVITY;
1174 return ap->ops->transmit_led_message(ap, state, size);
1177 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
1179 struct ata_link *link = dev->link;
1180 struct ata_port *ap = link->ap;
1181 struct ahci_port_priv *pp = ap->private_data;
1182 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1183 u32 port_led_state = emp->led_state;
1185 /* save the desired Activity LED behavior */
1188 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
1190 /* set the LED to OFF */
1191 port_led_state &= EM_MSG_LED_VALUE_OFF;
1192 port_led_state |= (ap->port_no | (link->pmp << 8));
1193 ap->ops->transmit_led_message(ap, port_led_state, 4);
1195 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1196 if (val == BLINK_OFF) {
1197 /* set LED to ON for idle */
1198 port_led_state &= EM_MSG_LED_VALUE_OFF;
1199 port_led_state |= (ap->port_no | (link->pmp << 8));
1200 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */
1201 ap->ops->transmit_led_message(ap, port_led_state, 4);
1204 emp->blink_policy = val;
1208 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
1210 struct ata_link *link = dev->link;
1211 struct ata_port *ap = link->ap;
1212 struct ahci_port_priv *pp = ap->private_data;
1213 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1215 /* display the saved value of activity behavior for this
1218 return sprintf(buf, "%d\n", emp->blink_policy);
1221 static void ahci_port_init(struct device *dev, struct ata_port *ap,
1222 int port_no, void __iomem *mmio,
1223 void __iomem *port_mmio)
1225 struct ahci_host_priv *hpriv = ap->host->private_data;
1226 const char *emsg = NULL;
1230 /* make sure port is not active */
1231 rc = ahci_deinit_port(ap, &emsg);
1233 dev_warn(dev, "%s (%d)\n", emsg, rc);
1236 tmp = readl(port_mmio + PORT_SCR_ERR);
1237 dev_dbg(dev, "PORT_SCR_ERR 0x%x\n", tmp);
1238 writel(tmp, port_mmio + PORT_SCR_ERR);
1240 /* clear port IRQ */
1241 tmp = readl(port_mmio + PORT_IRQ_STAT);
1242 dev_dbg(dev, "PORT_IRQ_STAT 0x%x\n", tmp);
1244 writel(tmp, port_mmio + PORT_IRQ_STAT);
1246 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1248 /* mark esata ports */
1249 tmp = readl(port_mmio + PORT_CMD);
1250 if ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS))
1251 ap->pflags |= ATA_PFLAG_EXTERNAL;
1254 void ahci_init_controller(struct ata_host *host)
1256 struct ahci_host_priv *hpriv = host->private_data;
1257 void __iomem *mmio = hpriv->mmio;
1259 void __iomem *port_mmio;
1262 for (i = 0; i < host->n_ports; i++) {
1263 struct ata_port *ap = host->ports[i];
1265 port_mmio = ahci_port_base(ap);
1266 if (ata_port_is_dummy(ap))
1269 ahci_port_init(host->dev, ap, i, mmio, port_mmio);
1272 tmp = readl(mmio + HOST_CTL);
1273 dev_dbg(host->dev, "HOST_CTL 0x%x\n", tmp);
1274 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1275 tmp = readl(mmio + HOST_CTL);
1276 dev_dbg(host->dev, "HOST_CTL 0x%x\n", tmp);
1278 EXPORT_SYMBOL_GPL(ahci_init_controller);
1280 static void ahci_dev_config(struct ata_device *dev)
1282 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1284 if (hpriv->flags & AHCI_HFLAG_SECT255) {
1285 dev->max_sectors = 255;
1287 "SB600 AHCI: limiting to 255 sectors per cmd\n");
1291 unsigned int ahci_dev_classify(struct ata_port *ap)
1293 void __iomem *port_mmio = ahci_port_base(ap);
1294 struct ata_taskfile tf;
1297 tmp = readl(port_mmio + PORT_SIG);
1298 tf.lbah = (tmp >> 24) & 0xff;
1299 tf.lbam = (tmp >> 16) & 0xff;
1300 tf.lbal = (tmp >> 8) & 0xff;
1301 tf.nsect = (tmp) & 0xff;
1303 return ata_port_classify(ap, &tf);
1305 EXPORT_SYMBOL_GPL(ahci_dev_classify);
1307 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1310 dma_addr_t cmd_tbl_dma;
1312 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1314 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1315 pp->cmd_slot[tag].status = 0;
1316 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1317 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1319 EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot);
1321 int ahci_kick_engine(struct ata_port *ap)
1323 void __iomem *port_mmio = ahci_port_base(ap);
1324 struct ahci_host_priv *hpriv = ap->host->private_data;
1325 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1330 rc = hpriv->stop_engine(ap);
1335 * always do CLO if PMP is attached (AHCI-1.3 9.2)
1337 busy = status & (ATA_BUSY | ATA_DRQ);
1338 if (!busy && !sata_pmp_attached(ap)) {
1343 if (!(hpriv->cap & HOST_CAP_CLO)) {
1349 tmp = readl(port_mmio + PORT_CMD);
1350 tmp |= PORT_CMD_CLO;
1351 writel(tmp, port_mmio + PORT_CMD);
1354 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
1355 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1356 if (tmp & PORT_CMD_CLO)
1359 /* restart engine */
1361 hpriv->start_engine(ap);
1364 EXPORT_SYMBOL_GPL(ahci_kick_engine);
1366 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1367 struct ata_taskfile *tf, int is_cmd, u16 flags,
1368 unsigned long timeout_msec)
1370 const u32 cmd_fis_len = 5; /* five dwords */
1371 struct ahci_port_priv *pp = ap->private_data;
1372 void __iomem *port_mmio = ahci_port_base(ap);
1373 u8 *fis = pp->cmd_tbl;
1376 /* prep the command */
1377 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1378 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1380 /* set port value for softreset of Port Multiplier */
1381 if (pp->fbs_enabled && pp->fbs_last_dev != pmp) {
1382 tmp = readl(port_mmio + PORT_FBS);
1383 tmp &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
1384 tmp |= pmp << PORT_FBS_DEV_OFFSET;
1385 writel(tmp, port_mmio + PORT_FBS);
1386 pp->fbs_last_dev = pmp;
1390 writel(1, port_mmio + PORT_CMD_ISSUE);
1393 tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE,
1394 0x1, 0x1, 1, timeout_msec);
1396 ahci_kick_engine(ap);
1400 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1405 int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1406 int pmp, unsigned long deadline,
1407 int (*check_ready)(struct ata_link *link))
1409 struct ata_port *ap = link->ap;
1410 struct ahci_host_priv *hpriv = ap->host->private_data;
1411 struct ahci_port_priv *pp = ap->private_data;
1412 const char *reason = NULL;
1413 unsigned long now, msecs;
1414 struct ata_taskfile tf;
1415 bool fbs_disabled = false;
1418 /* prepare for SRST (AHCI-1.1 10.4.1) */
1419 rc = ahci_kick_engine(ap);
1420 if (rc && rc != -EOPNOTSUPP)
1421 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc);
1424 * According to AHCI-1.2 9.3.9: if FBS is enable, software shall
1425 * clear PxFBS.EN to '0' prior to issuing software reset to devices
1426 * that is attached to port multiplier.
1428 if (!ata_is_host_link(link) && pp->fbs_enabled) {
1429 ahci_disable_fbs(ap);
1430 fbs_disabled = true;
1433 ata_tf_init(link->device, &tf);
1435 /* issue the first H2D Register FIS */
1438 if (time_after(deadline, now))
1439 msecs = jiffies_to_msecs(deadline - now);
1442 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1443 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1445 reason = "1st FIS failed";
1449 /* spec says at least 5us, but be generous and sleep for 1ms */
1452 /* issue the second H2D Register FIS */
1453 tf.ctl &= ~ATA_SRST;
1454 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1456 /* wait for link to become ready */
1457 rc = ata_wait_after_reset(link, deadline, check_ready);
1458 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) {
1460 * Workaround for cases where link online status can't
1461 * be trusted. Treat device readiness timeout as link
1464 ata_link_info(link, "device not ready, treating as offline\n");
1465 *class = ATA_DEV_NONE;
1467 /* link occupied, -ENODEV too is an error */
1468 reason = "device not ready";
1471 *class = ahci_dev_classify(ap);
1473 /* re-enable FBS if disabled before */
1475 ahci_enable_fbs(ap);
1480 ata_link_err(link, "softreset failed (%s)\n", reason);
1484 int ahci_check_ready(struct ata_link *link)
1486 void __iomem *port_mmio = ahci_port_base(link->ap);
1487 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1489 return ata_check_ready(status);
1491 EXPORT_SYMBOL_GPL(ahci_check_ready);
1493 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1494 unsigned long deadline)
1496 int pmp = sata_srst_pmp(link);
1498 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
1500 EXPORT_SYMBOL_GPL(ahci_do_softreset);
1502 static int ahci_bad_pmp_check_ready(struct ata_link *link)
1504 void __iomem *port_mmio = ahci_port_base(link->ap);
1505 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1506 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT);
1509 * There is no need to check TFDATA if BAD PMP is found due to HW bug,
1510 * which can save timeout delay.
1512 if (irq_status & PORT_IRQ_BAD_PMP)
1515 return ata_check_ready(status);
1518 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
1519 unsigned long deadline)
1521 struct ata_port *ap = link->ap;
1522 void __iomem *port_mmio = ahci_port_base(ap);
1523 int pmp = sata_srst_pmp(link);
1527 rc = ahci_do_softreset(link, class, pmp, deadline,
1528 ahci_bad_pmp_check_ready);
1531 * Soft reset fails with IPMS set when PMP is enabled but
1532 * SATA HDD/ODD is connected to SATA port, do soft reset
1536 irq_sts = readl(port_mmio + PORT_IRQ_STAT);
1537 if (irq_sts & PORT_IRQ_BAD_PMP) {
1539 "applying PMP SRST workaround "
1541 rc = ahci_do_softreset(link, class, 0, deadline,
1549 int ahci_do_hardreset(struct ata_link *link, unsigned int *class,
1550 unsigned long deadline, bool *online)
1552 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
1553 struct ata_port *ap = link->ap;
1554 struct ahci_port_priv *pp = ap->private_data;
1555 struct ahci_host_priv *hpriv = ap->host->private_data;
1556 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1557 struct ata_taskfile tf;
1560 hpriv->stop_engine(ap);
1562 /* clear D2H reception area to properly wait for D2H FIS */
1563 ata_tf_init(link->device, &tf);
1564 tf.status = ATA_BUSY;
1565 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1567 rc = sata_link_hardreset(link, timing, deadline, online,
1570 hpriv->start_engine(ap);
1573 *class = ahci_dev_classify(ap);
1577 EXPORT_SYMBOL_GPL(ahci_do_hardreset);
1579 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1580 unsigned long deadline)
1584 return ahci_do_hardreset(link, class, deadline, &online);
1587 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1589 struct ata_port *ap = link->ap;
1590 void __iomem *port_mmio = ahci_port_base(ap);
1593 ata_std_postreset(link, class);
1595 /* Make sure port's ATAPI bit is set appropriately */
1596 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1597 if (*class == ATA_DEV_ATAPI)
1598 new_tmp |= PORT_CMD_ATAPI;
1600 new_tmp &= ~PORT_CMD_ATAPI;
1601 if (new_tmp != tmp) {
1602 writel(new_tmp, port_mmio + PORT_CMD);
1603 readl(port_mmio + PORT_CMD); /* flush */
1607 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1609 struct scatterlist *sg;
1610 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1614 * Next, the S/G list.
1616 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1617 dma_addr_t addr = sg_dma_address(sg);
1618 u32 sg_len = sg_dma_len(sg);
1620 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
1621 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
1622 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
1628 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc)
1630 struct ata_port *ap = qc->ap;
1631 struct ahci_port_priv *pp = ap->private_data;
1633 if (!sata_pmp_attached(ap) || pp->fbs_enabled)
1634 return ata_std_qc_defer(qc);
1636 return sata_pmp_qc_defer_cmd_switch(qc);
1639 static enum ata_completion_errors ahci_qc_prep(struct ata_queued_cmd *qc)
1641 struct ata_port *ap = qc->ap;
1642 struct ahci_port_priv *pp = ap->private_data;
1643 int is_atapi = ata_is_atapi(qc->tf.protocol);
1646 const u32 cmd_fis_len = 5; /* five dwords */
1647 unsigned int n_elem;
1650 * Fill in command table information. First, the header,
1651 * a SATA Register - Host to Device command FIS.
1653 cmd_tbl = pp->cmd_tbl + qc->hw_tag * AHCI_CMD_TBL_SZ;
1655 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1657 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1658 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1662 if (qc->flags & ATA_QCFLAG_DMAMAP)
1663 n_elem = ahci_fill_sg(qc, cmd_tbl);
1666 * Fill in command slot information.
1668 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1669 if (qc->tf.flags & ATA_TFLAG_WRITE)
1670 opts |= AHCI_CMD_WRITE;
1672 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1674 ahci_fill_cmd_slot(pp, qc->hw_tag, opts);
1679 static void ahci_fbs_dec_intr(struct ata_port *ap)
1681 struct ahci_port_priv *pp = ap->private_data;
1682 void __iomem *port_mmio = ahci_port_base(ap);
1683 u32 fbs = readl(port_mmio + PORT_FBS);
1686 BUG_ON(!pp->fbs_enabled);
1688 /* time to wait for DEC is not specified by AHCI spec,
1689 * add a retry loop for safety.
1691 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS);
1692 fbs = readl(port_mmio + PORT_FBS);
1693 while ((fbs & PORT_FBS_DEC) && retries--) {
1695 fbs = readl(port_mmio + PORT_FBS);
1698 if (fbs & PORT_FBS_DEC)
1699 dev_err(ap->host->dev, "failed to clear device error\n");
1702 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1704 struct ahci_host_priv *hpriv = ap->host->private_data;
1705 struct ahci_port_priv *pp = ap->private_data;
1706 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1707 struct ata_link *link = NULL;
1708 struct ata_queued_cmd *active_qc;
1709 struct ata_eh_info *active_ehi;
1710 bool fbs_need_dec = false;
1713 /* determine active link with error */
1714 if (pp->fbs_enabled) {
1715 void __iomem *port_mmio = ahci_port_base(ap);
1716 u32 fbs = readl(port_mmio + PORT_FBS);
1717 int pmp = fbs >> PORT_FBS_DWE_OFFSET;
1719 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) {
1720 link = &ap->pmp_link[pmp];
1721 fbs_need_dec = true;
1725 ata_for_each_link(link, ap, EDGE)
1726 if (ata_link_active(link))
1732 active_qc = ata_qc_from_tag(ap, link->active_tag);
1733 active_ehi = &link->eh_info;
1735 /* record irq stat */
1736 ata_ehi_clear_desc(host_ehi);
1737 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1739 /* AHCI needs SError cleared; otherwise, it might lock up */
1740 ahci_scr_read(&ap->link, SCR_ERROR, &serror);
1741 ahci_scr_write(&ap->link, SCR_ERROR, serror);
1742 host_ehi->serror |= serror;
1744 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1745 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1746 irq_stat &= ~PORT_IRQ_IF_ERR;
1748 if (irq_stat & PORT_IRQ_TF_ERR) {
1749 /* If qc is active, charge it; otherwise, the active
1750 * link. There's no active qc on NCQ errors. It will
1751 * be determined by EH by reading log page 10h.
1754 active_qc->err_mask |= AC_ERR_DEV;
1756 active_ehi->err_mask |= AC_ERR_DEV;
1758 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1759 host_ehi->serror &= ~SERR_INTERNAL;
1762 if (irq_stat & PORT_IRQ_UNK_FIS) {
1763 u32 *unk = pp->rx_fis + RX_FIS_UNK;
1765 active_ehi->err_mask |= AC_ERR_HSM;
1766 active_ehi->action |= ATA_EH_RESET;
1767 ata_ehi_push_desc(active_ehi,
1768 "unknown FIS %08x %08x %08x %08x" ,
1769 unk[0], unk[1], unk[2], unk[3]);
1772 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) {
1773 active_ehi->err_mask |= AC_ERR_HSM;
1774 active_ehi->action |= ATA_EH_RESET;
1775 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1778 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1779 host_ehi->err_mask |= AC_ERR_HOST_BUS;
1780 host_ehi->action |= ATA_EH_RESET;
1781 ata_ehi_push_desc(host_ehi, "host bus error");
1784 if (irq_stat & PORT_IRQ_IF_ERR) {
1786 active_ehi->err_mask |= AC_ERR_DEV;
1788 host_ehi->err_mask |= AC_ERR_ATA_BUS;
1789 host_ehi->action |= ATA_EH_RESET;
1792 ata_ehi_push_desc(host_ehi, "interface fatal error");
1795 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1796 ata_ehi_hotplugged(host_ehi);
1797 ata_ehi_push_desc(host_ehi, "%s",
1798 irq_stat & PORT_IRQ_CONNECT ?
1799 "connection status changed" : "PHY RDY changed");
1802 /* okay, let's hand over to EH */
1804 if (irq_stat & PORT_IRQ_FREEZE)
1805 ata_port_freeze(ap);
1806 else if (fbs_need_dec) {
1807 ata_link_abort(link);
1808 ahci_fbs_dec_intr(ap);
1813 static void ahci_handle_port_interrupt(struct ata_port *ap,
1814 void __iomem *port_mmio, u32 status)
1816 struct ata_eh_info *ehi = &ap->link.eh_info;
1817 struct ahci_port_priv *pp = ap->private_data;
1818 struct ahci_host_priv *hpriv = ap->host->private_data;
1819 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
1823 /* ignore BAD_PMP while resetting */
1824 if (unlikely(resetting))
1825 status &= ~PORT_IRQ_BAD_PMP;
1827 if (sata_lpm_ignore_phy_events(&ap->link)) {
1828 status &= ~PORT_IRQ_PHYRDY;
1829 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
1832 if (unlikely(status & PORT_IRQ_ERROR)) {
1833 ahci_error_intr(ap, status);
1837 if (status & PORT_IRQ_SDB_FIS) {
1838 /* If SNotification is available, leave notification
1839 * handling to sata_async_notification(). If not,
1840 * emulate it by snooping SDB FIS RX area.
1842 * Snooping FIS RX area is probably cheaper than
1843 * poking SNotification but some constrollers which
1844 * implement SNotification, ICH9 for example, don't
1845 * store AN SDB FIS into receive area.
1847 if (hpriv->cap & HOST_CAP_SNTF)
1848 sata_async_notification(ap);
1850 /* If the 'N' bit in word 0 of the FIS is set,
1851 * we just received asynchronous notification.
1852 * Tell libata about it.
1854 * Lack of SNotification should not appear in
1855 * ahci 1.2, so the workaround is unnecessary
1856 * when FBS is enabled.
1858 if (pp->fbs_enabled)
1861 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1862 u32 f0 = le32_to_cpu(f[0]);
1864 sata_async_notification(ap);
1869 /* pp->active_link is not reliable once FBS is enabled, both
1870 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because
1871 * NCQ and non-NCQ commands may be in flight at the same time.
1873 if (pp->fbs_enabled) {
1874 if (ap->qc_active) {
1875 qc_active = readl(port_mmio + PORT_SCR_ACT);
1876 qc_active |= readl(port_mmio + PORT_CMD_ISSUE);
1879 /* pp->active_link is valid iff any command is in flight */
1880 if (ap->qc_active && pp->active_link->sactive)
1881 qc_active = readl(port_mmio + PORT_SCR_ACT);
1883 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1887 rc = ata_qc_complete_multiple(ap, qc_active);
1889 /* while resetting, invalid completions are expected */
1890 if (unlikely(rc < 0 && !resetting)) {
1891 ehi->err_mask |= AC_ERR_HSM;
1892 ehi->action |= ATA_EH_RESET;
1893 ata_port_freeze(ap);
1897 static void ahci_port_intr(struct ata_port *ap)
1899 void __iomem *port_mmio = ahci_port_base(ap);
1902 status = readl(port_mmio + PORT_IRQ_STAT);
1903 writel(status, port_mmio + PORT_IRQ_STAT);
1905 ahci_handle_port_interrupt(ap, port_mmio, status);
1908 static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance)
1910 struct ata_port *ap = dev_instance;
1911 void __iomem *port_mmio = ahci_port_base(ap);
1914 status = readl(port_mmio + PORT_IRQ_STAT);
1915 writel(status, port_mmio + PORT_IRQ_STAT);
1917 spin_lock(ap->lock);
1918 ahci_handle_port_interrupt(ap, port_mmio, status);
1919 spin_unlock(ap->lock);
1924 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked)
1926 unsigned int i, handled = 0;
1928 for (i = 0; i < host->n_ports; i++) {
1929 struct ata_port *ap;
1931 if (!(irq_masked & (1 << i)))
1934 ap = host->ports[i];
1938 if (ata_ratelimit())
1940 "interrupt on disabled port %u\n", i);
1948 EXPORT_SYMBOL_GPL(ahci_handle_port_intr);
1950 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance)
1952 struct ata_host *host = dev_instance;
1953 struct ahci_host_priv *hpriv;
1954 unsigned int rc = 0;
1956 u32 irq_stat, irq_masked;
1958 hpriv = host->private_data;
1961 /* sigh. 0xffffffff is a valid return from h/w */
1962 irq_stat = readl(mmio + HOST_IRQ_STAT);
1966 irq_masked = irq_stat & hpriv->port_map;
1968 spin_lock(&host->lock);
1970 rc = ahci_handle_port_intr(host, irq_masked);
1972 /* HOST_IRQ_STAT behaves as level triggered latch meaning that
1973 * it should be cleared after all the port events are cleared;
1974 * otherwise, it will raise a spurious interrupt after each
1975 * valid one. Please read section 10.6.2 of ahci 1.1 for more
1978 * Also, use the unmasked value to clear interrupt as spurious
1979 * pending event on a dummy port might cause screaming IRQ.
1981 writel(irq_stat, mmio + HOST_IRQ_STAT);
1983 spin_unlock(&host->lock);
1985 return IRQ_RETVAL(rc);
1988 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1990 struct ata_port *ap = qc->ap;
1991 void __iomem *port_mmio = ahci_port_base(ap);
1992 struct ahci_port_priv *pp = ap->private_data;
1994 /* Keep track of the currently active link. It will be used
1995 * in completion path to determine whether NCQ phase is in
1998 pp->active_link = qc->dev->link;
2000 if (ata_is_ncq(qc->tf.protocol))
2001 writel(1 << qc->hw_tag, port_mmio + PORT_SCR_ACT);
2003 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) {
2004 u32 fbs = readl(port_mmio + PORT_FBS);
2005 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
2006 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET;
2007 writel(fbs, port_mmio + PORT_FBS);
2008 pp->fbs_last_dev = qc->dev->link->pmp;
2011 writel(1 << qc->hw_tag, port_mmio + PORT_CMD_ISSUE);
2013 ahci_sw_activity(qc->dev->link);
2017 EXPORT_SYMBOL_GPL(ahci_qc_issue);
2019 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
2021 struct ahci_port_priv *pp = qc->ap->private_data;
2022 u8 *rx_fis = pp->rx_fis;
2024 if (pp->fbs_enabled)
2025 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
2028 * After a successful execution of an ATA PIO data-in command,
2029 * the device doesn't send D2H Reg FIS to update the TF and
2030 * the host should take TF and E_Status from the preceding PIO
2033 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE &&
2034 !(qc->flags & ATA_QCFLAG_FAILED)) {
2035 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
2036 qc->result_tf.status = (rx_fis + RX_FIS_PIO_SETUP)[15];
2038 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);
2043 static void ahci_freeze(struct ata_port *ap)
2045 void __iomem *port_mmio = ahci_port_base(ap);
2048 writel(0, port_mmio + PORT_IRQ_MASK);
2051 static void ahci_thaw(struct ata_port *ap)
2053 struct ahci_host_priv *hpriv = ap->host->private_data;
2054 void __iomem *mmio = hpriv->mmio;
2055 void __iomem *port_mmio = ahci_port_base(ap);
2057 struct ahci_port_priv *pp = ap->private_data;
2060 tmp = readl(port_mmio + PORT_IRQ_STAT);
2061 writel(tmp, port_mmio + PORT_IRQ_STAT);
2062 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
2064 /* turn IRQ back on */
2065 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2068 void ahci_error_handler(struct ata_port *ap)
2070 struct ahci_host_priv *hpriv = ap->host->private_data;
2072 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
2073 /* restart engine */
2074 hpriv->stop_engine(ap);
2075 hpriv->start_engine(ap);
2078 sata_pmp_error_handler(ap);
2080 if (!ata_dev_enabled(ap->link.device))
2081 hpriv->stop_engine(ap);
2083 EXPORT_SYMBOL_GPL(ahci_error_handler);
2085 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
2087 struct ata_port *ap = qc->ap;
2089 /* make DMA engine forget about the failed command */
2090 if (qc->flags & ATA_QCFLAG_FAILED)
2091 ahci_kick_engine(ap);
2094 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
2096 struct ahci_host_priv *hpriv = ap->host->private_data;
2097 void __iomem *port_mmio = ahci_port_base(ap);
2098 struct ata_device *dev = ap->link.device;
2099 u32 devslp, dm, dito, mdat, deto, dito_conf;
2101 unsigned int err_mask;
2103 devslp = readl(port_mmio + PORT_DEVSLP);
2104 if (!(devslp & PORT_DEVSLP_DSP)) {
2105 dev_info(ap->host->dev, "port does not support device sleep\n");
2109 /* disable device sleep */
2111 if (devslp & PORT_DEVSLP_ADSE) {
2112 writel(devslp & ~PORT_DEVSLP_ADSE,
2113 port_mmio + PORT_DEVSLP);
2114 err_mask = ata_dev_set_feature(dev,
2115 SETFEATURES_SATA_DISABLE,
2117 if (err_mask && err_mask != AC_ERR_DEV)
2118 ata_dev_warn(dev, "failed to disable DEVSLP\n");
2123 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET;
2124 dito = devslp_idle_timeout / (dm + 1);
2128 dito_conf = (devslp >> PORT_DEVSLP_DITO_OFFSET) & 0x3FF;
2130 /* device sleep was already enabled and same dito */
2131 if ((devslp & PORT_DEVSLP_ADSE) && (dito_conf == dito))
2134 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */
2135 rc = hpriv->stop_engine(ap);
2139 /* Use the nominal value 10 ms if the read MDAT is zero,
2140 * the nominal value of DETO is 20 ms.
2142 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] &
2143 ATA_LOG_DEVSLP_VALID_MASK) {
2144 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] &
2145 ATA_LOG_DEVSLP_MDAT_MASK;
2148 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO];
2156 /* Make dito, mdat, deto bits to 0s */
2157 devslp &= ~GENMASK_ULL(24, 2);
2158 devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) |
2159 (mdat << PORT_DEVSLP_MDAT_OFFSET) |
2160 (deto << PORT_DEVSLP_DETO_OFFSET) |
2162 writel(devslp, port_mmio + PORT_DEVSLP);
2164 hpriv->start_engine(ap);
2166 /* enable device sleep feature for the drive */
2167 err_mask = ata_dev_set_feature(dev,
2168 SETFEATURES_SATA_ENABLE,
2170 if (err_mask && err_mask != AC_ERR_DEV)
2171 ata_dev_warn(dev, "failed to enable DEVSLP\n");
2174 static void ahci_enable_fbs(struct ata_port *ap)
2176 struct ahci_host_priv *hpriv = ap->host->private_data;
2177 struct ahci_port_priv *pp = ap->private_data;
2178 void __iomem *port_mmio = ahci_port_base(ap);
2182 if (!pp->fbs_supported)
2185 fbs = readl(port_mmio + PORT_FBS);
2186 if (fbs & PORT_FBS_EN) {
2187 pp->fbs_enabled = true;
2188 pp->fbs_last_dev = -1; /* initialization */
2192 rc = hpriv->stop_engine(ap);
2196 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS);
2197 fbs = readl(port_mmio + PORT_FBS);
2198 if (fbs & PORT_FBS_EN) {
2199 dev_info(ap->host->dev, "FBS is enabled\n");
2200 pp->fbs_enabled = true;
2201 pp->fbs_last_dev = -1; /* initialization */
2203 dev_err(ap->host->dev, "Failed to enable FBS\n");
2205 hpriv->start_engine(ap);
2208 static void ahci_disable_fbs(struct ata_port *ap)
2210 struct ahci_host_priv *hpriv = ap->host->private_data;
2211 struct ahci_port_priv *pp = ap->private_data;
2212 void __iomem *port_mmio = ahci_port_base(ap);
2216 if (!pp->fbs_supported)
2219 fbs = readl(port_mmio + PORT_FBS);
2220 if ((fbs & PORT_FBS_EN) == 0) {
2221 pp->fbs_enabled = false;
2225 rc = hpriv->stop_engine(ap);
2229 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS);
2230 fbs = readl(port_mmio + PORT_FBS);
2231 if (fbs & PORT_FBS_EN)
2232 dev_err(ap->host->dev, "Failed to disable FBS\n");
2234 dev_info(ap->host->dev, "FBS is disabled\n");
2235 pp->fbs_enabled = false;
2238 hpriv->start_engine(ap);
2241 static void ahci_pmp_attach(struct ata_port *ap)
2243 void __iomem *port_mmio = ahci_port_base(ap);
2244 struct ahci_port_priv *pp = ap->private_data;
2247 cmd = readl(port_mmio + PORT_CMD);
2248 cmd |= PORT_CMD_PMP;
2249 writel(cmd, port_mmio + PORT_CMD);
2251 ahci_enable_fbs(ap);
2253 pp->intr_mask |= PORT_IRQ_BAD_PMP;
2256 * We must not change the port interrupt mask register if the
2257 * port is marked frozen, the value in pp->intr_mask will be
2258 * restored later when the port is thawed.
2260 * Note that during initialization, the port is marked as
2261 * frozen since the irq handler is not yet registered.
2263 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2264 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2267 static void ahci_pmp_detach(struct ata_port *ap)
2269 void __iomem *port_mmio = ahci_port_base(ap);
2270 struct ahci_port_priv *pp = ap->private_data;
2273 ahci_disable_fbs(ap);
2275 cmd = readl(port_mmio + PORT_CMD);
2276 cmd &= ~PORT_CMD_PMP;
2277 writel(cmd, port_mmio + PORT_CMD);
2279 pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
2281 /* see comment above in ahci_pmp_attach() */
2282 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2283 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2286 int ahci_port_resume(struct ata_port *ap)
2288 ahci_rpm_get_port(ap);
2291 ahci_start_port(ap);
2293 if (sata_pmp_attached(ap))
2294 ahci_pmp_attach(ap);
2296 ahci_pmp_detach(ap);
2300 EXPORT_SYMBOL_GPL(ahci_port_resume);
2303 static void ahci_handle_s2idle(struct ata_port *ap)
2305 void __iomem *port_mmio = ahci_port_base(ap);
2308 if (pm_suspend_via_firmware())
2310 devslp = readl(port_mmio + PORT_DEVSLP);
2311 if ((devslp & PORT_DEVSLP_ADSE))
2312 ata_msleep(ap, devslp_idle_timeout);
2315 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
2317 const char *emsg = NULL;
2320 rc = ahci_deinit_port(ap, &emsg);
2322 ahci_power_down(ap);
2324 ata_port_err(ap, "%s (%d)\n", emsg, rc);
2325 ata_port_freeze(ap);
2328 if (acpi_storage_d3(ap->host->dev))
2329 ahci_handle_s2idle(ap);
2331 ahci_rpm_put_port(ap);
2336 static int ahci_port_start(struct ata_port *ap)
2338 struct ahci_host_priv *hpriv = ap->host->private_data;
2339 struct device *dev = ap->host->dev;
2340 struct ahci_port_priv *pp;
2343 size_t dma_sz, rx_fis_sz;
2345 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
2349 if (ap->host->n_ports > 1) {
2350 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL);
2351 if (!pp->irq_desc) {
2352 devm_kfree(dev, pp);
2355 snprintf(pp->irq_desc, 8,
2356 "%s%d", dev_driver_string(dev), ap->port_no);
2359 /* check FBS capability */
2360 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) {
2361 void __iomem *port_mmio = ahci_port_base(ap);
2362 u32 cmd = readl(port_mmio + PORT_CMD);
2363 if (cmd & PORT_CMD_FBSCP)
2364 pp->fbs_supported = true;
2365 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) {
2366 dev_info(dev, "port %d can do FBS, forcing FBSCP\n",
2368 pp->fbs_supported = true;
2370 dev_warn(dev, "port %d is not capable of FBS\n",
2374 if (pp->fbs_supported) {
2375 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ;
2376 rx_fis_sz = AHCI_RX_FIS_SZ * 16;
2378 dma_sz = AHCI_PORT_PRIV_DMA_SZ;
2379 rx_fis_sz = AHCI_RX_FIS_SZ;
2382 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL);
2387 * First item in chunk of DMA memory: 32-slot command table,
2388 * 32 bytes each in size
2391 pp->cmd_slot_dma = mem_dma;
2393 mem += AHCI_CMD_SLOT_SZ;
2394 mem_dma += AHCI_CMD_SLOT_SZ;
2397 * Second item: Received-FIS area
2400 pp->rx_fis_dma = mem_dma;
2403 mem_dma += rx_fis_sz;
2406 * Third item: data area for storing a single command
2407 * and its scatter-gather table
2410 pp->cmd_tbl_dma = mem_dma;
2413 * Save off initial list of interrupts to be enabled.
2414 * This could be changed later
2416 pp->intr_mask = DEF_PORT_IRQ;
2419 * Switch to per-port locking in case each port has its own MSI vector.
2421 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2422 spin_lock_init(&pp->lock);
2423 ap->lock = &pp->lock;
2426 ap->private_data = pp;
2428 /* engage engines, captain */
2429 return ahci_port_resume(ap);
2432 static void ahci_port_stop(struct ata_port *ap)
2434 const char *emsg = NULL;
2435 struct ahci_host_priv *hpriv = ap->host->private_data;
2436 void __iomem *host_mmio = hpriv->mmio;
2439 /* de-initialize port */
2440 rc = ahci_deinit_port(ap, &emsg);
2442 ata_port_warn(ap, "%s (%d)\n", emsg, rc);
2445 * Clear GHC.IS to prevent stuck INTx after disabling MSI and
2448 writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT);
2450 ahci_rpm_put_port(ap);
2453 void ahci_print_info(struct ata_host *host, const char *scc_s)
2455 struct ahci_host_priv *hpriv = host->private_data;
2456 u32 vers, cap, cap2, impl, speed;
2457 const char *speed_s;
2459 vers = hpriv->version;
2462 impl = hpriv->port_map;
2464 speed = (cap >> 20) & 0xf;
2467 else if (speed == 2)
2469 else if (speed == 3)
2475 "AHCI %02x%02x.%02x%02x "
2476 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2479 (vers >> 24) & 0xff,
2480 (vers >> 16) & 0xff,
2484 ((cap >> 8) & 0x1f) + 1,
2498 cap & HOST_CAP_64 ? "64bit " : "",
2499 cap & HOST_CAP_NCQ ? "ncq " : "",
2500 cap & HOST_CAP_SNTF ? "sntf " : "",
2501 cap & HOST_CAP_MPS ? "ilck " : "",
2502 cap & HOST_CAP_SSS ? "stag " : "",
2503 cap & HOST_CAP_ALPM ? "pm " : "",
2504 cap & HOST_CAP_LED ? "led " : "",
2505 cap & HOST_CAP_CLO ? "clo " : "",
2506 cap & HOST_CAP_ONLY ? "only " : "",
2507 cap & HOST_CAP_PMP ? "pmp " : "",
2508 cap & HOST_CAP_FBS ? "fbs " : "",
2509 cap & HOST_CAP_PIO_MULTI ? "pio " : "",
2510 cap & HOST_CAP_SSC ? "slum " : "",
2511 cap & HOST_CAP_PART ? "part " : "",
2512 cap & HOST_CAP_CCC ? "ccc " : "",
2513 cap & HOST_CAP_EMS ? "ems " : "",
2514 cap & HOST_CAP_SXS ? "sxs " : "",
2515 cap2 & HOST_CAP2_DESO ? "deso " : "",
2516 cap2 & HOST_CAP2_SADM ? "sadm " : "",
2517 cap2 & HOST_CAP2_SDS ? "sds " : "",
2518 cap2 & HOST_CAP2_APST ? "apst " : "",
2519 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "",
2520 cap2 & HOST_CAP2_BOH ? "boh " : ""
2523 EXPORT_SYMBOL_GPL(ahci_print_info);
2525 void ahci_set_em_messages(struct ahci_host_priv *hpriv,
2526 struct ata_port_info *pi)
2529 void __iomem *mmio = hpriv->mmio;
2530 u32 em_loc = readl(mmio + HOST_EM_LOC);
2531 u32 em_ctl = readl(mmio + HOST_EM_CTL);
2533 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS))
2536 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16;
2540 hpriv->em_loc = ((em_loc >> 16) * 4);
2541 hpriv->em_buf_sz = ((em_loc & 0xff) * 4);
2542 hpriv->em_msg_type = messages;
2543 pi->flags |= ATA_FLAG_EM;
2544 if (!(em_ctl & EM_CTL_ALHD))
2545 pi->flags |= ATA_FLAG_SW_ACTIVITY;
2548 EXPORT_SYMBOL_GPL(ahci_set_em_messages);
2550 static int ahci_host_activate_multi_irqs(struct ata_host *host,
2551 struct scsi_host_template *sht)
2553 struct ahci_host_priv *hpriv = host->private_data;
2556 rc = ata_host_start(host);
2560 * Requests IRQs according to AHCI-1.1 when multiple MSIs were
2561 * allocated. That is one MSI per port, starting from @irq.
2563 for (i = 0; i < host->n_ports; i++) {
2564 struct ahci_port_priv *pp = host->ports[i]->private_data;
2565 int irq = hpriv->get_irq_vector(host, i);
2567 /* Do not receive interrupts sent by dummy ports */
2573 rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard,
2574 0, pp->irq_desc, host->ports[i]);
2578 ata_port_desc(host->ports[i], "irq %d", irq);
2581 return ata_host_register(host, sht);
2585 * ahci_host_activate - start AHCI host, request IRQs and register it
2586 * @host: target ATA host
2587 * @sht: scsi_host_template to use when registering the host
2590 * Inherited from calling layer (may sleep).
2593 * 0 on success, -errno otherwise.
2595 int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht)
2597 struct ahci_host_priv *hpriv = host->private_data;
2598 int irq = hpriv->irq;
2601 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2602 if (hpriv->irq_handler &&
2603 hpriv->irq_handler != ahci_single_level_irq_intr)
2605 "both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented\n");
2606 if (!hpriv->get_irq_vector) {
2608 "AHCI_HFLAG_MULTI_MSI requires ->get_irq_vector!\n");
2612 rc = ahci_host_activate_multi_irqs(host, sht);
2614 rc = ata_host_activate(host, irq, hpriv->irq_handler,
2621 EXPORT_SYMBOL_GPL(ahci_host_activate);
2623 MODULE_AUTHOR("Jeff Garzik");
2624 MODULE_DESCRIPTION("Common AHCI SATA low-level routines");
2625 MODULE_LICENSE("GPL");