1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libahci.c - Common AHCI SATA low-level routines
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 void 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 struct device_attribute *ahci_shost_attrs[] = {
112 &dev_attr_link_power_management_policy,
113 &dev_attr_em_message_type,
114 &dev_attr_em_message,
115 &dev_attr_ahci_host_caps,
116 &dev_attr_ahci_host_cap2,
117 &dev_attr_ahci_host_version,
118 &dev_attr_ahci_port_cmd,
120 &dev_attr_em_message_supported,
123 EXPORT_SYMBOL_GPL(ahci_shost_attrs);
125 struct device_attribute *ahci_sdev_attrs[] = {
126 &dev_attr_sw_activity,
127 &dev_attr_unload_heads,
128 &dev_attr_ncq_prio_enable,
131 EXPORT_SYMBOL_GPL(ahci_sdev_attrs);
133 struct ata_port_operations ahci_ops = {
134 .inherits = &sata_pmp_port_ops,
136 .qc_defer = ahci_pmp_qc_defer,
137 .qc_prep = ahci_qc_prep,
138 .qc_issue = ahci_qc_issue,
139 .qc_fill_rtf = ahci_qc_fill_rtf,
141 .freeze = ahci_freeze,
143 .softreset = ahci_softreset,
144 .hardreset = ahci_hardreset,
145 .postreset = ahci_postreset,
146 .pmp_softreset = ahci_softreset,
147 .error_handler = ahci_error_handler,
148 .post_internal_cmd = ahci_post_internal_cmd,
149 .dev_config = ahci_dev_config,
151 .scr_read = ahci_scr_read,
152 .scr_write = ahci_scr_write,
153 .pmp_attach = ahci_pmp_attach,
154 .pmp_detach = ahci_pmp_detach,
156 .set_lpm = ahci_set_lpm,
157 .em_show = ahci_led_show,
158 .em_store = ahci_led_store,
159 .sw_activity_show = ahci_activity_show,
160 .sw_activity_store = ahci_activity_store,
161 .transmit_led_message = ahci_transmit_led_message,
163 .port_suspend = ahci_port_suspend,
164 .port_resume = ahci_port_resume,
166 .port_start = ahci_port_start,
167 .port_stop = ahci_port_stop,
169 EXPORT_SYMBOL_GPL(ahci_ops);
171 struct ata_port_operations ahci_pmp_retry_srst_ops = {
172 .inherits = &ahci_ops,
173 .softreset = ahci_pmp_retry_softreset,
175 EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops);
177 static bool ahci_em_messages __read_mostly = true;
178 EXPORT_SYMBOL_GPL(ahci_em_messages);
179 module_param(ahci_em_messages, bool, 0444);
180 /* add other LED protocol types when they become supported */
181 MODULE_PARM_DESC(ahci_em_messages,
182 "AHCI Enclosure Management Message control (0 = off, 1 = on)");
184 /* device sleep idle timeout in ms */
185 static int devslp_idle_timeout __read_mostly = 1000;
186 module_param(devslp_idle_timeout, int, 0644);
187 MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout");
189 static void ahci_enable_ahci(void __iomem *mmio)
194 /* turn on AHCI_EN */
195 tmp = readl(mmio + HOST_CTL);
196 if (tmp & HOST_AHCI_EN)
199 /* Some controllers need AHCI_EN to be written multiple times.
200 * Try a few times before giving up.
202 for (i = 0; i < 5; i++) {
204 writel(tmp, mmio + HOST_CTL);
205 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */
206 if (tmp & HOST_AHCI_EN)
215 * ahci_rpm_get_port - Make sure the port is powered on
216 * @ap: Port to power on
218 * Whenever there is need to access the AHCI host registers outside of
219 * normal execution paths, call this function to make sure the host is
220 * actually powered on.
222 static int ahci_rpm_get_port(struct ata_port *ap)
224 return pm_runtime_get_sync(ap->dev);
228 * ahci_rpm_put_port - Undoes ahci_rpm_get_port()
229 * @ap: Port to power down
231 * Undoes ahci_rpm_get_port() and possibly powers down the AHCI host
232 * if it has no more active users.
234 static void ahci_rpm_put_port(struct ata_port *ap)
236 pm_runtime_put(ap->dev);
239 static ssize_t ahci_show_host_caps(struct device *dev,
240 struct device_attribute *attr, char *buf)
242 struct Scsi_Host *shost = class_to_shost(dev);
243 struct ata_port *ap = ata_shost_to_port(shost);
244 struct ahci_host_priv *hpriv = ap->host->private_data;
246 return sprintf(buf, "%x\n", hpriv->cap);
249 static ssize_t ahci_show_host_cap2(struct device *dev,
250 struct device_attribute *attr, char *buf)
252 struct Scsi_Host *shost = class_to_shost(dev);
253 struct ata_port *ap = ata_shost_to_port(shost);
254 struct ahci_host_priv *hpriv = ap->host->private_data;
256 return sprintf(buf, "%x\n", hpriv->cap2);
259 static ssize_t ahci_show_host_version(struct device *dev,
260 struct device_attribute *attr, char *buf)
262 struct Scsi_Host *shost = class_to_shost(dev);
263 struct ata_port *ap = ata_shost_to_port(shost);
264 struct ahci_host_priv *hpriv = ap->host->private_data;
266 return sprintf(buf, "%x\n", hpriv->version);
269 static ssize_t ahci_show_port_cmd(struct device *dev,
270 struct device_attribute *attr, char *buf)
272 struct Scsi_Host *shost = class_to_shost(dev);
273 struct ata_port *ap = ata_shost_to_port(shost);
274 void __iomem *port_mmio = ahci_port_base(ap);
277 ahci_rpm_get_port(ap);
278 ret = sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD));
279 ahci_rpm_put_port(ap);
284 static ssize_t ahci_read_em_buffer(struct device *dev,
285 struct device_attribute *attr, char *buf)
287 struct Scsi_Host *shost = class_to_shost(dev);
288 struct ata_port *ap = ata_shost_to_port(shost);
289 struct ahci_host_priv *hpriv = ap->host->private_data;
290 void __iomem *mmio = hpriv->mmio;
291 void __iomem *em_mmio = mmio + hpriv->em_loc;
297 ahci_rpm_get_port(ap);
298 spin_lock_irqsave(ap->lock, flags);
300 em_ctl = readl(mmio + HOST_EM_CTL);
301 if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT ||
302 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) {
303 spin_unlock_irqrestore(ap->lock, flags);
304 ahci_rpm_put_port(ap);
308 if (!(em_ctl & EM_CTL_MR)) {
309 spin_unlock_irqrestore(ap->lock, flags);
310 ahci_rpm_put_port(ap);
314 if (!(em_ctl & EM_CTL_SMB))
315 em_mmio += hpriv->em_buf_sz;
317 count = hpriv->em_buf_sz;
319 /* the count should not be larger than PAGE_SIZE */
320 if (count > PAGE_SIZE) {
321 if (printk_ratelimit())
323 "EM read buffer size too large: "
324 "buffer size %u, page size %lu\n",
325 hpriv->em_buf_sz, PAGE_SIZE);
329 for (i = 0; i < count; i += 4) {
330 msg = readl(em_mmio + i);
332 buf[i + 1] = (msg >> 8) & 0xff;
333 buf[i + 2] = (msg >> 16) & 0xff;
334 buf[i + 3] = (msg >> 24) & 0xff;
337 spin_unlock_irqrestore(ap->lock, flags);
338 ahci_rpm_put_port(ap);
343 static ssize_t ahci_store_em_buffer(struct device *dev,
344 struct device_attribute *attr,
345 const char *buf, size_t size)
347 struct Scsi_Host *shost = class_to_shost(dev);
348 struct ata_port *ap = ata_shost_to_port(shost);
349 struct ahci_host_priv *hpriv = ap->host->private_data;
350 void __iomem *mmio = hpriv->mmio;
351 void __iomem *em_mmio = mmio + hpriv->em_loc;
352 const unsigned char *msg_buf = buf;
357 /* check size validity */
358 if (!(ap->flags & ATA_FLAG_EM) ||
359 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) ||
360 size % 4 || size > hpriv->em_buf_sz)
363 ahci_rpm_get_port(ap);
364 spin_lock_irqsave(ap->lock, flags);
366 em_ctl = readl(mmio + HOST_EM_CTL);
367 if (em_ctl & EM_CTL_TM) {
368 spin_unlock_irqrestore(ap->lock, flags);
369 ahci_rpm_put_port(ap);
373 for (i = 0; i < size; i += 4) {
374 msg = msg_buf[i] | msg_buf[i + 1] << 8 |
375 msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24;
376 writel(msg, em_mmio + i);
379 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
381 spin_unlock_irqrestore(ap->lock, flags);
382 ahci_rpm_put_port(ap);
387 static ssize_t ahci_show_em_supported(struct device *dev,
388 struct device_attribute *attr, char *buf)
390 struct Scsi_Host *shost = class_to_shost(dev);
391 struct ata_port *ap = ata_shost_to_port(shost);
392 struct ahci_host_priv *hpriv = ap->host->private_data;
393 void __iomem *mmio = hpriv->mmio;
396 ahci_rpm_get_port(ap);
397 em_ctl = readl(mmio + HOST_EM_CTL);
398 ahci_rpm_put_port(ap);
400 return sprintf(buf, "%s%s%s%s\n",
401 em_ctl & EM_CTL_LED ? "led " : "",
402 em_ctl & EM_CTL_SAFTE ? "saf-te " : "",
403 em_ctl & EM_CTL_SES ? "ses-2 " : "",
404 em_ctl & EM_CTL_SGPIO ? "sgpio " : "");
408 * ahci_save_initial_config - Save and fixup initial config values
409 * @dev: target AHCI device
410 * @hpriv: host private area to store config values
412 * Some registers containing configuration info might be setup by
413 * BIOS and might be cleared on reset. This function saves the
414 * initial values of those registers into @hpriv such that they
415 * can be restored after controller reset.
417 * If inconsistent, config values are fixed up by this function.
419 * If it is not set already this function sets hpriv->start_engine to
425 void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv)
427 void __iomem *mmio = hpriv->mmio;
428 u32 cap, cap2, vers, port_map;
431 /* make sure AHCI mode is enabled before accessing CAP */
432 ahci_enable_ahci(mmio);
434 /* Values prefixed with saved_ are written back to host after
435 * reset. Values without are used for driver operation.
437 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
438 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
440 /* CAP2 register is only defined for AHCI 1.2 and later */
441 vers = readl(mmio + HOST_VERSION);
442 if ((vers >> 16) > 1 ||
443 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200))
444 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2);
446 hpriv->saved_cap2 = cap2 = 0;
448 /* some chips have errata preventing 64bit use */
449 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
450 dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n");
454 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
455 dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n");
456 cap &= ~HOST_CAP_NCQ;
459 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) {
460 dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n");
464 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
465 dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n");
466 cap &= ~HOST_CAP_PMP;
469 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) {
471 "controller can't do SNTF, turning off CAP_SNTF\n");
472 cap &= ~HOST_CAP_SNTF;
475 if ((cap2 & HOST_CAP2_SDS) && (hpriv->flags & AHCI_HFLAG_NO_DEVSLP)) {
477 "controller can't do DEVSLP, turning off\n");
478 cap2 &= ~HOST_CAP2_SDS;
479 cap2 &= ~HOST_CAP2_SADM;
482 if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) {
483 dev_info(dev, "controller can do FBS, turning on CAP_FBS\n");
487 if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) {
488 dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n");
489 cap &= ~HOST_CAP_FBS;
492 if (!(cap & HOST_CAP_ALPM) && (hpriv->flags & AHCI_HFLAG_YES_ALPM)) {
493 dev_info(dev, "controller can do ALPM, turning on CAP_ALPM\n");
494 cap |= HOST_CAP_ALPM;
497 if (hpriv->force_port_map && port_map != hpriv->force_port_map) {
498 dev_info(dev, "forcing port_map 0x%x -> 0x%x\n",
499 port_map, hpriv->force_port_map);
500 port_map = hpriv->force_port_map;
501 hpriv->saved_port_map = port_map;
504 if (hpriv->mask_port_map) {
505 dev_warn(dev, "masking port_map 0x%x -> 0x%x\n",
507 port_map & hpriv->mask_port_map);
508 port_map &= hpriv->mask_port_map;
511 /* cross check port_map and cap.n_ports */
515 for (i = 0; i < AHCI_MAX_PORTS; i++)
516 if (port_map & (1 << i))
519 /* If PI has more ports than n_ports, whine, clear
520 * port_map and let it be generated from n_ports.
522 if (map_ports > ahci_nr_ports(cap)) {
524 "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n",
525 port_map, ahci_nr_ports(cap));
530 /* fabricate port_map from cap.nr_ports for < AHCI 1.3 */
531 if (!port_map && vers < 0x10300) {
532 port_map = (1 << ahci_nr_ports(cap)) - 1;
533 dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map);
535 /* write the fixed up value to the PI register */
536 hpriv->saved_port_map = port_map;
539 /* record values to use during operation */
542 hpriv->version = readl(mmio + HOST_VERSION);
543 hpriv->port_map = port_map;
545 if (!hpriv->start_engine)
546 hpriv->start_engine = ahci_start_engine;
548 if (!hpriv->stop_engine)
549 hpriv->stop_engine = ahci_stop_engine;
551 if (!hpriv->irq_handler)
552 hpriv->irq_handler = ahci_single_level_irq_intr;
554 EXPORT_SYMBOL_GPL(ahci_save_initial_config);
557 * ahci_restore_initial_config - Restore initial config
558 * @host: target ATA host
560 * Restore initial config stored by ahci_save_initial_config().
565 static void ahci_restore_initial_config(struct ata_host *host)
567 struct ahci_host_priv *hpriv = host->private_data;
568 void __iomem *mmio = hpriv->mmio;
570 writel(hpriv->saved_cap, mmio + HOST_CAP);
571 if (hpriv->saved_cap2)
572 writel(hpriv->saved_cap2, mmio + HOST_CAP2);
573 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
574 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
577 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
579 static const int offset[] = {
580 [SCR_STATUS] = PORT_SCR_STAT,
581 [SCR_CONTROL] = PORT_SCR_CTL,
582 [SCR_ERROR] = PORT_SCR_ERR,
583 [SCR_ACTIVE] = PORT_SCR_ACT,
584 [SCR_NOTIFICATION] = PORT_SCR_NTF,
586 struct ahci_host_priv *hpriv = ap->host->private_data;
588 if (sc_reg < ARRAY_SIZE(offset) &&
589 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
590 return offset[sc_reg];
594 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
596 void __iomem *port_mmio = ahci_port_base(link->ap);
597 int offset = ahci_scr_offset(link->ap, sc_reg);
600 *val = readl(port_mmio + offset);
606 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
608 void __iomem *port_mmio = ahci_port_base(link->ap);
609 int offset = ahci_scr_offset(link->ap, sc_reg);
612 writel(val, port_mmio + offset);
618 void ahci_start_engine(struct ata_port *ap)
620 void __iomem *port_mmio = ahci_port_base(ap);
624 tmp = readl(port_mmio + PORT_CMD);
625 tmp |= PORT_CMD_START;
626 writel(tmp, port_mmio + PORT_CMD);
627 readl(port_mmio + PORT_CMD); /* flush */
629 EXPORT_SYMBOL_GPL(ahci_start_engine);
631 int ahci_stop_engine(struct ata_port *ap)
633 void __iomem *port_mmio = ahci_port_base(ap);
634 struct ahci_host_priv *hpriv = ap->host->private_data;
638 * On some controllers, stopping a port's DMA engine while the port
639 * is in ALPM state (partial or slumber) results in failures on
640 * subsequent DMA engine starts. For those controllers, put the
641 * port back in active state before stopping its DMA engine.
643 if ((hpriv->flags & AHCI_HFLAG_WAKE_BEFORE_STOP) &&
644 (ap->link.lpm_policy > ATA_LPM_MAX_POWER) &&
645 ahci_set_lpm(&ap->link, ATA_LPM_MAX_POWER, ATA_LPM_WAKE_ONLY)) {
646 dev_err(ap->host->dev, "Failed to wake up port before engine stop\n");
650 tmp = readl(port_mmio + PORT_CMD);
652 /* check if the HBA is idle */
653 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
657 * Don't try to issue commands but return with ENODEV if the
658 * AHCI controller not available anymore (e.g. due to PCIe hot
659 * unplugging). Otherwise a 500ms delay for each port is added.
661 if (tmp == 0xffffffff) {
662 dev_err(ap->host->dev, "AHCI controller unavailable!\n");
666 /* setting HBA to idle */
667 tmp &= ~PORT_CMD_START;
668 writel(tmp, port_mmio + PORT_CMD);
670 /* wait for engine to stop. This could be as long as 500 msec */
671 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
672 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
673 if (tmp & PORT_CMD_LIST_ON)
678 EXPORT_SYMBOL_GPL(ahci_stop_engine);
680 void ahci_start_fis_rx(struct ata_port *ap)
682 void __iomem *port_mmio = ahci_port_base(ap);
683 struct ahci_host_priv *hpriv = ap->host->private_data;
684 struct ahci_port_priv *pp = ap->private_data;
687 /* set FIS registers */
688 if (hpriv->cap & HOST_CAP_64)
689 writel((pp->cmd_slot_dma >> 16) >> 16,
690 port_mmio + PORT_LST_ADDR_HI);
691 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
693 if (hpriv->cap & HOST_CAP_64)
694 writel((pp->rx_fis_dma >> 16) >> 16,
695 port_mmio + PORT_FIS_ADDR_HI);
696 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
698 /* enable FIS reception */
699 tmp = readl(port_mmio + PORT_CMD);
700 tmp |= PORT_CMD_FIS_RX;
701 writel(tmp, port_mmio + PORT_CMD);
704 readl(port_mmio + PORT_CMD);
706 EXPORT_SYMBOL_GPL(ahci_start_fis_rx);
708 static int ahci_stop_fis_rx(struct ata_port *ap)
710 void __iomem *port_mmio = ahci_port_base(ap);
713 /* disable FIS reception */
714 tmp = readl(port_mmio + PORT_CMD);
715 tmp &= ~PORT_CMD_FIS_RX;
716 writel(tmp, port_mmio + PORT_CMD);
718 /* wait for completion, spec says 500ms, give it 1000 */
719 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
720 PORT_CMD_FIS_ON, 10, 1000);
721 if (tmp & PORT_CMD_FIS_ON)
727 static void ahci_power_up(struct ata_port *ap)
729 struct ahci_host_priv *hpriv = ap->host->private_data;
730 void __iomem *port_mmio = ahci_port_base(ap);
733 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
736 if (hpriv->cap & HOST_CAP_SSS) {
737 cmd |= PORT_CMD_SPIN_UP;
738 writel(cmd, port_mmio + PORT_CMD);
742 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
745 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
748 struct ata_port *ap = link->ap;
749 struct ahci_host_priv *hpriv = ap->host->private_data;
750 struct ahci_port_priv *pp = ap->private_data;
751 void __iomem *port_mmio = ahci_port_base(ap);
753 if (policy != ATA_LPM_MAX_POWER) {
754 /* wakeup flag only applies to the max power policy */
755 hints &= ~ATA_LPM_WAKE_ONLY;
758 * Disable interrupts on Phy Ready. This keeps us from
759 * getting woken up due to spurious phy ready
762 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
763 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
765 sata_link_scr_lpm(link, policy, false);
768 if (hpriv->cap & HOST_CAP_ALPM) {
769 u32 cmd = readl(port_mmio + PORT_CMD);
771 if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) {
772 if (!(hints & ATA_LPM_WAKE_ONLY))
773 cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE);
774 cmd |= PORT_CMD_ICC_ACTIVE;
776 writel(cmd, port_mmio + PORT_CMD);
777 readl(port_mmio + PORT_CMD);
779 /* wait 10ms to be sure we've come out of LPM state */
782 if (hints & ATA_LPM_WAKE_ONLY)
785 cmd |= PORT_CMD_ALPE;
786 if (policy == ATA_LPM_MIN_POWER)
788 else if (policy == ATA_LPM_MIN_POWER_WITH_PARTIAL)
789 cmd &= ~PORT_CMD_ASP;
791 /* write out new cmd value */
792 writel(cmd, port_mmio + PORT_CMD);
796 /* set aggressive device sleep */
797 if ((hpriv->cap2 & HOST_CAP2_SDS) &&
798 (hpriv->cap2 & HOST_CAP2_SADM) &&
799 (link->device->flags & ATA_DFLAG_DEVSLP)) {
800 if (policy == ATA_LPM_MIN_POWER ||
801 policy == ATA_LPM_MIN_POWER_WITH_PARTIAL)
802 ahci_set_aggressive_devslp(ap, true);
804 ahci_set_aggressive_devslp(ap, false);
807 if (policy == ATA_LPM_MAX_POWER) {
808 sata_link_scr_lpm(link, policy, false);
810 /* turn PHYRDY IRQ back on */
811 pp->intr_mask |= PORT_IRQ_PHYRDY;
812 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
819 static void ahci_power_down(struct ata_port *ap)
821 struct ahci_host_priv *hpriv = ap->host->private_data;
822 void __iomem *port_mmio = ahci_port_base(ap);
825 if (!(hpriv->cap & HOST_CAP_SSS))
828 /* put device into listen mode, first set PxSCTL.DET to 0 */
829 scontrol = readl(port_mmio + PORT_SCR_CTL);
831 writel(scontrol, port_mmio + PORT_SCR_CTL);
833 /* then set PxCMD.SUD to 0 */
834 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
835 cmd &= ~PORT_CMD_SPIN_UP;
836 writel(cmd, port_mmio + PORT_CMD);
840 static void ahci_start_port(struct ata_port *ap)
842 struct ahci_host_priv *hpriv = ap->host->private_data;
843 struct ahci_port_priv *pp = ap->private_data;
844 struct ata_link *link;
845 struct ahci_em_priv *emp;
849 /* enable FIS reception */
850 ahci_start_fis_rx(ap);
853 if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE))
854 hpriv->start_engine(ap);
857 if (ap->flags & ATA_FLAG_EM) {
858 ata_for_each_link(link, ap, EDGE) {
859 emp = &pp->em_priv[link->pmp];
861 /* EM Transmit bit maybe busy during init */
862 for (i = 0; i < EM_MAX_RETRY; i++) {
863 rc = ap->ops->transmit_led_message(ap,
867 * If busy, give a breather but do not
868 * release EH ownership by using msleep()
869 * instead of ata_msleep(). EM Transmit
870 * bit is busy for the whole host and
871 * releasing ownership will cause other
872 * ports to fail the same way.
882 if (ap->flags & ATA_FLAG_SW_ACTIVITY)
883 ata_for_each_link(link, ap, EDGE)
884 ahci_init_sw_activity(link);
888 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
891 struct ahci_host_priv *hpriv = ap->host->private_data;
894 rc = hpriv->stop_engine(ap);
896 *emsg = "failed to stop engine";
900 /* disable FIS reception */
901 rc = ahci_stop_fis_rx(ap);
903 *emsg = "failed stop FIS RX";
910 int ahci_reset_controller(struct ata_host *host)
912 struct ahci_host_priv *hpriv = host->private_data;
913 void __iomem *mmio = hpriv->mmio;
916 /* we must be in AHCI mode, before using anything
917 * AHCI-specific, such as HOST_RESET.
919 ahci_enable_ahci(mmio);
921 /* global controller reset */
922 if (!ahci_skip_host_reset) {
923 tmp = readl(mmio + HOST_CTL);
924 if ((tmp & HOST_RESET) == 0) {
925 writel(tmp | HOST_RESET, mmio + HOST_CTL);
926 readl(mmio + HOST_CTL); /* flush */
930 * to perform host reset, OS should set HOST_RESET
931 * and poll until this bit is read to be "0".
932 * reset must complete within 1 second, or
933 * the hardware should be considered fried.
935 tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET,
936 HOST_RESET, 10, 1000);
938 if (tmp & HOST_RESET) {
939 dev_err(host->dev, "controller reset failed (0x%x)\n",
944 /* turn on AHCI mode */
945 ahci_enable_ahci(mmio);
947 /* Some registers might be cleared on reset. Restore
950 if (!(hpriv->flags & AHCI_HFLAG_NO_WRITE_TO_RO))
951 ahci_restore_initial_config(host);
953 dev_info(host->dev, "skipping global host reset\n");
957 EXPORT_SYMBOL_GPL(ahci_reset_controller);
959 static void ahci_sw_activity(struct ata_link *link)
961 struct ata_port *ap = link->ap;
962 struct ahci_port_priv *pp = ap->private_data;
963 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
965 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
969 if (!timer_pending(&emp->timer))
970 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
973 static void ahci_sw_activity_blink(struct timer_list *t)
975 struct ahci_em_priv *emp = from_timer(emp, t, timer);
976 struct ata_link *link = emp->link;
977 struct ata_port *ap = link->ap;
979 unsigned long led_message = emp->led_state;
980 u32 activity_led_state;
983 led_message &= EM_MSG_LED_VALUE;
984 led_message |= ap->port_no | (link->pmp << 8);
986 /* check to see if we've had activity. If so,
987 * toggle state of LED and reset timer. If not,
988 * turn LED to desired idle state.
990 spin_lock_irqsave(ap->lock, flags);
991 if (emp->saved_activity != emp->activity) {
992 emp->saved_activity = emp->activity;
993 /* get the current LED state */
994 activity_led_state = led_message & EM_MSG_LED_VALUE_ON;
996 if (activity_led_state)
997 activity_led_state = 0;
999 activity_led_state = 1;
1001 /* clear old state */
1002 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1005 led_message |= (activity_led_state << 16);
1006 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
1008 /* switch to idle */
1009 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1010 if (emp->blink_policy == BLINK_OFF)
1011 led_message |= (1 << 16);
1013 spin_unlock_irqrestore(ap->lock, flags);
1014 ap->ops->transmit_led_message(ap, led_message, 4);
1017 static void ahci_init_sw_activity(struct ata_link *link)
1019 struct ata_port *ap = link->ap;
1020 struct ahci_port_priv *pp = ap->private_data;
1021 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1023 /* init activity stats, setup timer */
1024 emp->saved_activity = emp->activity = 0;
1026 timer_setup(&emp->timer, ahci_sw_activity_blink, 0);
1028 /* check our blink policy and set flag for link if it's enabled */
1029 if (emp->blink_policy)
1030 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1033 int ahci_reset_em(struct ata_host *host)
1035 struct ahci_host_priv *hpriv = host->private_data;
1036 void __iomem *mmio = hpriv->mmio;
1039 em_ctl = readl(mmio + HOST_EM_CTL);
1040 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
1043 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
1046 EXPORT_SYMBOL_GPL(ahci_reset_em);
1048 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
1051 struct ahci_host_priv *hpriv = ap->host->private_data;
1052 struct ahci_port_priv *pp = ap->private_data;
1053 void __iomem *mmio = hpriv->mmio;
1055 u32 message[] = {0, 0};
1056 unsigned long flags;
1058 struct ahci_em_priv *emp;
1060 /* get the slot number from the message */
1061 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1062 if (pmp < EM_MAX_SLOTS)
1063 emp = &pp->em_priv[pmp];
1067 ahci_rpm_get_port(ap);
1068 spin_lock_irqsave(ap->lock, flags);
1071 * if we are still busy transmitting a previous message,
1074 em_ctl = readl(mmio + HOST_EM_CTL);
1075 if (em_ctl & EM_CTL_TM) {
1076 spin_unlock_irqrestore(ap->lock, flags);
1077 ahci_rpm_put_port(ap);
1081 if (hpriv->em_msg_type & EM_MSG_TYPE_LED) {
1083 * create message header - this is all zero except for
1084 * the message size, which is 4 bytes.
1086 message[0] |= (4 << 8);
1088 /* ignore 0:4 of byte zero, fill in port info yourself */
1089 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no);
1091 /* write message to EM_LOC */
1092 writel(message[0], mmio + hpriv->em_loc);
1093 writel(message[1], mmio + hpriv->em_loc+4);
1096 * tell hardware to transmit the message
1098 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
1101 /* save off new led state for port/slot */
1102 emp->led_state = state;
1104 spin_unlock_irqrestore(ap->lock, flags);
1105 ahci_rpm_put_port(ap);
1110 static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
1112 struct ahci_port_priv *pp = ap->private_data;
1113 struct ata_link *link;
1114 struct ahci_em_priv *emp;
1117 ata_for_each_link(link, ap, EDGE) {
1118 emp = &pp->em_priv[link->pmp];
1119 rc += sprintf(buf, "%lx\n", emp->led_state);
1124 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
1129 struct ahci_port_priv *pp = ap->private_data;
1130 struct ahci_em_priv *emp;
1132 if (kstrtouint(buf, 0, &state) < 0)
1135 /* get the slot number from the message */
1136 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1137 if (pmp < EM_MAX_SLOTS) {
1138 pmp = array_index_nospec(pmp, EM_MAX_SLOTS);
1139 emp = &pp->em_priv[pmp];
1144 /* mask off the activity bits if we are in sw_activity
1145 * mode, user should turn off sw_activity before setting
1146 * activity led through em_message
1148 if (emp->blink_policy)
1149 state &= ~EM_MSG_LED_VALUE_ACTIVITY;
1151 return ap->ops->transmit_led_message(ap, state, size);
1154 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
1156 struct ata_link *link = dev->link;
1157 struct ata_port *ap = link->ap;
1158 struct ahci_port_priv *pp = ap->private_data;
1159 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1160 u32 port_led_state = emp->led_state;
1162 /* save the desired Activity LED behavior */
1165 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
1167 /* set the LED to OFF */
1168 port_led_state &= EM_MSG_LED_VALUE_OFF;
1169 port_led_state |= (ap->port_no | (link->pmp << 8));
1170 ap->ops->transmit_led_message(ap, port_led_state, 4);
1172 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1173 if (val == BLINK_OFF) {
1174 /* set LED to ON for idle */
1175 port_led_state &= EM_MSG_LED_VALUE_OFF;
1176 port_led_state |= (ap->port_no | (link->pmp << 8));
1177 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */
1178 ap->ops->transmit_led_message(ap, port_led_state, 4);
1181 emp->blink_policy = val;
1185 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
1187 struct ata_link *link = dev->link;
1188 struct ata_port *ap = link->ap;
1189 struct ahci_port_priv *pp = ap->private_data;
1190 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1192 /* display the saved value of activity behavior for this
1195 return sprintf(buf, "%d\n", emp->blink_policy);
1198 static void ahci_port_init(struct device *dev, struct ata_port *ap,
1199 int port_no, void __iomem *mmio,
1200 void __iomem *port_mmio)
1202 struct ahci_host_priv *hpriv = ap->host->private_data;
1203 const char *emsg = NULL;
1207 /* make sure port is not active */
1208 rc = ahci_deinit_port(ap, &emsg);
1210 dev_warn(dev, "%s (%d)\n", emsg, rc);
1213 tmp = readl(port_mmio + PORT_SCR_ERR);
1214 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1215 writel(tmp, port_mmio + PORT_SCR_ERR);
1217 /* clear port IRQ */
1218 tmp = readl(port_mmio + PORT_IRQ_STAT);
1219 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1221 writel(tmp, port_mmio + PORT_IRQ_STAT);
1223 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1225 /* mark esata ports */
1226 tmp = readl(port_mmio + PORT_CMD);
1227 if ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS))
1228 ap->pflags |= ATA_PFLAG_EXTERNAL;
1231 void ahci_init_controller(struct ata_host *host)
1233 struct ahci_host_priv *hpriv = host->private_data;
1234 void __iomem *mmio = hpriv->mmio;
1236 void __iomem *port_mmio;
1239 for (i = 0; i < host->n_ports; i++) {
1240 struct ata_port *ap = host->ports[i];
1242 port_mmio = ahci_port_base(ap);
1243 if (ata_port_is_dummy(ap))
1246 ahci_port_init(host->dev, ap, i, mmio, port_mmio);
1249 tmp = readl(mmio + HOST_CTL);
1250 VPRINTK("HOST_CTL 0x%x\n", tmp);
1251 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1252 tmp = readl(mmio + HOST_CTL);
1253 VPRINTK("HOST_CTL 0x%x\n", tmp);
1255 EXPORT_SYMBOL_GPL(ahci_init_controller);
1257 static void ahci_dev_config(struct ata_device *dev)
1259 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1261 if (hpriv->flags & AHCI_HFLAG_SECT255) {
1262 dev->max_sectors = 255;
1264 "SB600 AHCI: limiting to 255 sectors per cmd\n");
1268 unsigned int ahci_dev_classify(struct ata_port *ap)
1270 void __iomem *port_mmio = ahci_port_base(ap);
1271 struct ata_taskfile tf;
1274 tmp = readl(port_mmio + PORT_SIG);
1275 tf.lbah = (tmp >> 24) & 0xff;
1276 tf.lbam = (tmp >> 16) & 0xff;
1277 tf.lbal = (tmp >> 8) & 0xff;
1278 tf.nsect = (tmp) & 0xff;
1280 return ata_dev_classify(&tf);
1282 EXPORT_SYMBOL_GPL(ahci_dev_classify);
1284 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1287 dma_addr_t cmd_tbl_dma;
1289 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1291 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1292 pp->cmd_slot[tag].status = 0;
1293 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1294 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1296 EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot);
1298 int ahci_kick_engine(struct ata_port *ap)
1300 void __iomem *port_mmio = ahci_port_base(ap);
1301 struct ahci_host_priv *hpriv = ap->host->private_data;
1302 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1307 rc = hpriv->stop_engine(ap);
1312 * always do CLO if PMP is attached (AHCI-1.3 9.2)
1314 busy = status & (ATA_BUSY | ATA_DRQ);
1315 if (!busy && !sata_pmp_attached(ap)) {
1320 if (!(hpriv->cap & HOST_CAP_CLO)) {
1326 tmp = readl(port_mmio + PORT_CMD);
1327 tmp |= PORT_CMD_CLO;
1328 writel(tmp, port_mmio + PORT_CMD);
1331 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
1332 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1333 if (tmp & PORT_CMD_CLO)
1336 /* restart engine */
1338 hpriv->start_engine(ap);
1341 EXPORT_SYMBOL_GPL(ahci_kick_engine);
1343 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1344 struct ata_taskfile *tf, int is_cmd, u16 flags,
1345 unsigned long timeout_msec)
1347 const u32 cmd_fis_len = 5; /* five dwords */
1348 struct ahci_port_priv *pp = ap->private_data;
1349 void __iomem *port_mmio = ahci_port_base(ap);
1350 u8 *fis = pp->cmd_tbl;
1353 /* prep the command */
1354 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1355 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1357 /* set port value for softreset of Port Multiplier */
1358 if (pp->fbs_enabled && pp->fbs_last_dev != pmp) {
1359 tmp = readl(port_mmio + PORT_FBS);
1360 tmp &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
1361 tmp |= pmp << PORT_FBS_DEV_OFFSET;
1362 writel(tmp, port_mmio + PORT_FBS);
1363 pp->fbs_last_dev = pmp;
1367 writel(1, port_mmio + PORT_CMD_ISSUE);
1370 tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE,
1371 0x1, 0x1, 1, timeout_msec);
1373 ahci_kick_engine(ap);
1377 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1382 int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1383 int pmp, unsigned long deadline,
1384 int (*check_ready)(struct ata_link *link))
1386 struct ata_port *ap = link->ap;
1387 struct ahci_host_priv *hpriv = ap->host->private_data;
1388 struct ahci_port_priv *pp = ap->private_data;
1389 const char *reason = NULL;
1390 unsigned long now, msecs;
1391 struct ata_taskfile tf;
1392 bool fbs_disabled = false;
1397 /* prepare for SRST (AHCI-1.1 10.4.1) */
1398 rc = ahci_kick_engine(ap);
1399 if (rc && rc != -EOPNOTSUPP)
1400 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc);
1403 * According to AHCI-1.2 9.3.9: if FBS is enable, software shall
1404 * clear PxFBS.EN to '0' prior to issuing software reset to devices
1405 * that is attached to port multiplier.
1407 if (!ata_is_host_link(link) && pp->fbs_enabled) {
1408 ahci_disable_fbs(ap);
1409 fbs_disabled = true;
1412 ata_tf_init(link->device, &tf);
1414 /* issue the first H2D Register FIS */
1417 if (time_after(deadline, now))
1418 msecs = jiffies_to_msecs(deadline - now);
1421 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1422 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1424 reason = "1st FIS failed";
1428 /* spec says at least 5us, but be generous and sleep for 1ms */
1431 /* issue the second H2D Register FIS */
1432 tf.ctl &= ~ATA_SRST;
1433 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1435 /* wait for link to become ready */
1436 rc = ata_wait_after_reset(link, deadline, check_ready);
1437 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) {
1439 * Workaround for cases where link online status can't
1440 * be trusted. Treat device readiness timeout as link
1443 ata_link_info(link, "device not ready, treating as offline\n");
1444 *class = ATA_DEV_NONE;
1446 /* link occupied, -ENODEV too is an error */
1447 reason = "device not ready";
1450 *class = ahci_dev_classify(ap);
1452 /* re-enable FBS if disabled before */
1454 ahci_enable_fbs(ap);
1456 DPRINTK("EXIT, class=%u\n", *class);
1460 ata_link_err(link, "softreset failed (%s)\n", reason);
1464 int ahci_check_ready(struct ata_link *link)
1466 void __iomem *port_mmio = ahci_port_base(link->ap);
1467 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1469 return ata_check_ready(status);
1471 EXPORT_SYMBOL_GPL(ahci_check_ready);
1473 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1474 unsigned long deadline)
1476 int pmp = sata_srst_pmp(link);
1480 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
1482 EXPORT_SYMBOL_GPL(ahci_do_softreset);
1484 static int ahci_bad_pmp_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;
1488 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT);
1491 * There is no need to check TFDATA if BAD PMP is found due to HW bug,
1492 * which can save timeout delay.
1494 if (irq_status & PORT_IRQ_BAD_PMP)
1497 return ata_check_ready(status);
1500 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
1501 unsigned long deadline)
1503 struct ata_port *ap = link->ap;
1504 void __iomem *port_mmio = ahci_port_base(ap);
1505 int pmp = sata_srst_pmp(link);
1511 rc = ahci_do_softreset(link, class, pmp, deadline,
1512 ahci_bad_pmp_check_ready);
1515 * Soft reset fails with IPMS set when PMP is enabled but
1516 * SATA HDD/ODD is connected to SATA port, do soft reset
1520 irq_sts = readl(port_mmio + PORT_IRQ_STAT);
1521 if (irq_sts & PORT_IRQ_BAD_PMP) {
1523 "applying PMP SRST workaround "
1525 rc = ahci_do_softreset(link, class, 0, deadline,
1533 int ahci_do_hardreset(struct ata_link *link, unsigned int *class,
1534 unsigned long deadline, bool *online)
1536 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
1537 struct ata_port *ap = link->ap;
1538 struct ahci_port_priv *pp = ap->private_data;
1539 struct ahci_host_priv *hpriv = ap->host->private_data;
1540 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1541 struct ata_taskfile tf;
1546 hpriv->stop_engine(ap);
1548 /* clear D2H reception area to properly wait for D2H FIS */
1549 ata_tf_init(link->device, &tf);
1550 tf.command = ATA_BUSY;
1551 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1553 rc = sata_link_hardreset(link, timing, deadline, online,
1556 hpriv->start_engine(ap);
1559 *class = ahci_dev_classify(ap);
1561 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1564 EXPORT_SYMBOL_GPL(ahci_do_hardreset);
1566 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1567 unsigned long deadline)
1571 return ahci_do_hardreset(link, class, deadline, &online);
1574 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1576 struct ata_port *ap = link->ap;
1577 void __iomem *port_mmio = ahci_port_base(ap);
1580 ata_std_postreset(link, class);
1582 /* Make sure port's ATAPI bit is set appropriately */
1583 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1584 if (*class == ATA_DEV_ATAPI)
1585 new_tmp |= PORT_CMD_ATAPI;
1587 new_tmp &= ~PORT_CMD_ATAPI;
1588 if (new_tmp != tmp) {
1589 writel(new_tmp, port_mmio + PORT_CMD);
1590 readl(port_mmio + PORT_CMD); /* flush */
1594 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1596 struct scatterlist *sg;
1597 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1603 * Next, the S/G list.
1605 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1606 dma_addr_t addr = sg_dma_address(sg);
1607 u32 sg_len = sg_dma_len(sg);
1609 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
1610 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
1611 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
1617 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc)
1619 struct ata_port *ap = qc->ap;
1620 struct ahci_port_priv *pp = ap->private_data;
1622 if (!sata_pmp_attached(ap) || pp->fbs_enabled)
1623 return ata_std_qc_defer(qc);
1625 return sata_pmp_qc_defer_cmd_switch(qc);
1628 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1630 struct ata_port *ap = qc->ap;
1631 struct ahci_port_priv *pp = ap->private_data;
1632 int is_atapi = ata_is_atapi(qc->tf.protocol);
1635 const u32 cmd_fis_len = 5; /* five dwords */
1636 unsigned int n_elem;
1639 * Fill in command table information. First, the header,
1640 * a SATA Register - Host to Device command FIS.
1642 cmd_tbl = pp->cmd_tbl + qc->hw_tag * AHCI_CMD_TBL_SZ;
1644 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1646 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1647 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1651 if (qc->flags & ATA_QCFLAG_DMAMAP)
1652 n_elem = ahci_fill_sg(qc, cmd_tbl);
1655 * Fill in command slot information.
1657 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1658 if (qc->tf.flags & ATA_TFLAG_WRITE)
1659 opts |= AHCI_CMD_WRITE;
1661 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1663 ahci_fill_cmd_slot(pp, qc->hw_tag, opts);
1666 static void ahci_fbs_dec_intr(struct ata_port *ap)
1668 struct ahci_port_priv *pp = ap->private_data;
1669 void __iomem *port_mmio = ahci_port_base(ap);
1670 u32 fbs = readl(port_mmio + PORT_FBS);
1674 BUG_ON(!pp->fbs_enabled);
1676 /* time to wait for DEC is not specified by AHCI spec,
1677 * add a retry loop for safety.
1679 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS);
1680 fbs = readl(port_mmio + PORT_FBS);
1681 while ((fbs & PORT_FBS_DEC) && retries--) {
1683 fbs = readl(port_mmio + PORT_FBS);
1686 if (fbs & PORT_FBS_DEC)
1687 dev_err(ap->host->dev, "failed to clear device error\n");
1690 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1692 struct ahci_host_priv *hpriv = ap->host->private_data;
1693 struct ahci_port_priv *pp = ap->private_data;
1694 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1695 struct ata_link *link = NULL;
1696 struct ata_queued_cmd *active_qc;
1697 struct ata_eh_info *active_ehi;
1698 bool fbs_need_dec = false;
1701 /* determine active link with error */
1702 if (pp->fbs_enabled) {
1703 void __iomem *port_mmio = ahci_port_base(ap);
1704 u32 fbs = readl(port_mmio + PORT_FBS);
1705 int pmp = fbs >> PORT_FBS_DWE_OFFSET;
1707 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) {
1708 link = &ap->pmp_link[pmp];
1709 fbs_need_dec = true;
1713 ata_for_each_link(link, ap, EDGE)
1714 if (ata_link_active(link))
1720 active_qc = ata_qc_from_tag(ap, link->active_tag);
1721 active_ehi = &link->eh_info;
1723 /* record irq stat */
1724 ata_ehi_clear_desc(host_ehi);
1725 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1727 /* AHCI needs SError cleared; otherwise, it might lock up */
1728 ahci_scr_read(&ap->link, SCR_ERROR, &serror);
1729 ahci_scr_write(&ap->link, SCR_ERROR, serror);
1730 host_ehi->serror |= serror;
1732 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1733 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1734 irq_stat &= ~PORT_IRQ_IF_ERR;
1736 if (irq_stat & PORT_IRQ_TF_ERR) {
1737 /* If qc is active, charge it; otherwise, the active
1738 * link. There's no active qc on NCQ errors. It will
1739 * be determined by EH by reading log page 10h.
1742 active_qc->err_mask |= AC_ERR_DEV;
1744 active_ehi->err_mask |= AC_ERR_DEV;
1746 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1747 host_ehi->serror &= ~SERR_INTERNAL;
1750 if (irq_stat & PORT_IRQ_UNK_FIS) {
1751 u32 *unk = pp->rx_fis + RX_FIS_UNK;
1753 active_ehi->err_mask |= AC_ERR_HSM;
1754 active_ehi->action |= ATA_EH_RESET;
1755 ata_ehi_push_desc(active_ehi,
1756 "unknown FIS %08x %08x %08x %08x" ,
1757 unk[0], unk[1], unk[2], unk[3]);
1760 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) {
1761 active_ehi->err_mask |= AC_ERR_HSM;
1762 active_ehi->action |= ATA_EH_RESET;
1763 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1766 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1767 host_ehi->err_mask |= AC_ERR_HOST_BUS;
1768 host_ehi->action |= ATA_EH_RESET;
1769 ata_ehi_push_desc(host_ehi, "host bus error");
1772 if (irq_stat & PORT_IRQ_IF_ERR) {
1774 active_ehi->err_mask |= AC_ERR_DEV;
1776 host_ehi->err_mask |= AC_ERR_ATA_BUS;
1777 host_ehi->action |= ATA_EH_RESET;
1780 ata_ehi_push_desc(host_ehi, "interface fatal error");
1783 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1784 ata_ehi_hotplugged(host_ehi);
1785 ata_ehi_push_desc(host_ehi, "%s",
1786 irq_stat & PORT_IRQ_CONNECT ?
1787 "connection status changed" : "PHY RDY changed");
1790 /* okay, let's hand over to EH */
1792 if (irq_stat & PORT_IRQ_FREEZE)
1793 ata_port_freeze(ap);
1794 else if (fbs_need_dec) {
1795 ata_link_abort(link);
1796 ahci_fbs_dec_intr(ap);
1801 static void ahci_handle_port_interrupt(struct ata_port *ap,
1802 void __iomem *port_mmio, u32 status)
1804 struct ata_eh_info *ehi = &ap->link.eh_info;
1805 struct ahci_port_priv *pp = ap->private_data;
1806 struct ahci_host_priv *hpriv = ap->host->private_data;
1807 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
1811 /* ignore BAD_PMP while resetting */
1812 if (unlikely(resetting))
1813 status &= ~PORT_IRQ_BAD_PMP;
1815 if (sata_lpm_ignore_phy_events(&ap->link)) {
1816 status &= ~PORT_IRQ_PHYRDY;
1817 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
1820 if (unlikely(status & PORT_IRQ_ERROR)) {
1821 ahci_error_intr(ap, status);
1825 if (status & PORT_IRQ_SDB_FIS) {
1826 /* If SNotification is available, leave notification
1827 * handling to sata_async_notification(). If not,
1828 * emulate it by snooping SDB FIS RX area.
1830 * Snooping FIS RX area is probably cheaper than
1831 * poking SNotification but some constrollers which
1832 * implement SNotification, ICH9 for example, don't
1833 * store AN SDB FIS into receive area.
1835 if (hpriv->cap & HOST_CAP_SNTF)
1836 sata_async_notification(ap);
1838 /* If the 'N' bit in word 0 of the FIS is set,
1839 * we just received asynchronous notification.
1840 * Tell libata about it.
1842 * Lack of SNotification should not appear in
1843 * ahci 1.2, so the workaround is unnecessary
1844 * when FBS is enabled.
1846 if (pp->fbs_enabled)
1849 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1850 u32 f0 = le32_to_cpu(f[0]);
1852 sata_async_notification(ap);
1857 /* pp->active_link is not reliable once FBS is enabled, both
1858 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because
1859 * NCQ and non-NCQ commands may be in flight at the same time.
1861 if (pp->fbs_enabled) {
1862 if (ap->qc_active) {
1863 qc_active = readl(port_mmio + PORT_SCR_ACT);
1864 qc_active |= readl(port_mmio + PORT_CMD_ISSUE);
1867 /* pp->active_link is valid iff any command is in flight */
1868 if (ap->qc_active && pp->active_link->sactive)
1869 qc_active = readl(port_mmio + PORT_SCR_ACT);
1871 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1875 rc = ata_qc_complete_multiple(ap, qc_active);
1877 /* while resetting, invalid completions are expected */
1878 if (unlikely(rc < 0 && !resetting)) {
1879 ehi->err_mask |= AC_ERR_HSM;
1880 ehi->action |= ATA_EH_RESET;
1881 ata_port_freeze(ap);
1885 static void ahci_port_intr(struct ata_port *ap)
1887 void __iomem *port_mmio = ahci_port_base(ap);
1890 status = readl(port_mmio + PORT_IRQ_STAT);
1891 writel(status, port_mmio + PORT_IRQ_STAT);
1893 ahci_handle_port_interrupt(ap, port_mmio, status);
1896 static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance)
1898 struct ata_port *ap = dev_instance;
1899 void __iomem *port_mmio = ahci_port_base(ap);
1904 status = readl(port_mmio + PORT_IRQ_STAT);
1905 writel(status, port_mmio + PORT_IRQ_STAT);
1907 spin_lock(ap->lock);
1908 ahci_handle_port_interrupt(ap, port_mmio, status);
1909 spin_unlock(ap->lock);
1916 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked)
1918 unsigned int i, handled = 0;
1920 for (i = 0; i < host->n_ports; i++) {
1921 struct ata_port *ap;
1923 if (!(irq_masked & (1 << i)))
1926 ap = host->ports[i];
1929 VPRINTK("port %u\n", i);
1931 VPRINTK("port %u (no irq)\n", i);
1932 if (ata_ratelimit())
1934 "interrupt on disabled port %u\n", i);
1942 EXPORT_SYMBOL_GPL(ahci_handle_port_intr);
1944 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance)
1946 struct ata_host *host = dev_instance;
1947 struct ahci_host_priv *hpriv;
1948 unsigned int rc = 0;
1950 u32 irq_stat, irq_masked;
1954 hpriv = host->private_data;
1957 /* sigh. 0xffffffff is a valid return from h/w */
1958 irq_stat = readl(mmio + HOST_IRQ_STAT);
1962 irq_masked = irq_stat & hpriv->port_map;
1964 spin_lock(&host->lock);
1966 rc = ahci_handle_port_intr(host, irq_masked);
1968 /* HOST_IRQ_STAT behaves as level triggered latch meaning that
1969 * it should be cleared after all the port events are cleared;
1970 * otherwise, it will raise a spurious interrupt after each
1971 * valid one. Please read section 10.6.2 of ahci 1.1 for more
1974 * Also, use the unmasked value to clear interrupt as spurious
1975 * pending event on a dummy port might cause screaming IRQ.
1977 writel(irq_stat, mmio + HOST_IRQ_STAT);
1979 spin_unlock(&host->lock);
1983 return IRQ_RETVAL(rc);
1986 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1988 struct ata_port *ap = qc->ap;
1989 void __iomem *port_mmio = ahci_port_base(ap);
1990 struct ahci_port_priv *pp = ap->private_data;
1992 /* Keep track of the currently active link. It will be used
1993 * in completion path to determine whether NCQ phase is in
1996 pp->active_link = qc->dev->link;
1998 if (ata_is_ncq(qc->tf.protocol))
1999 writel(1 << qc->hw_tag, port_mmio + PORT_SCR_ACT);
2001 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) {
2002 u32 fbs = readl(port_mmio + PORT_FBS);
2003 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
2004 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET;
2005 writel(fbs, port_mmio + PORT_FBS);
2006 pp->fbs_last_dev = qc->dev->link->pmp;
2009 writel(1 << qc->hw_tag, port_mmio + PORT_CMD_ISSUE);
2011 ahci_sw_activity(qc->dev->link);
2015 EXPORT_SYMBOL_GPL(ahci_qc_issue);
2017 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
2019 struct ahci_port_priv *pp = qc->ap->private_data;
2020 u8 *rx_fis = pp->rx_fis;
2022 if (pp->fbs_enabled)
2023 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
2026 * After a successful execution of an ATA PIO data-in command,
2027 * the device doesn't send D2H Reg FIS to update the TF and
2028 * the host should take TF and E_Status from the preceding PIO
2031 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE &&
2032 !(qc->flags & ATA_QCFLAG_FAILED)) {
2033 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
2034 qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15];
2036 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);
2041 static void ahci_freeze(struct ata_port *ap)
2043 void __iomem *port_mmio = ahci_port_base(ap);
2046 writel(0, port_mmio + PORT_IRQ_MASK);
2049 static void ahci_thaw(struct ata_port *ap)
2051 struct ahci_host_priv *hpriv = ap->host->private_data;
2052 void __iomem *mmio = hpriv->mmio;
2053 void __iomem *port_mmio = ahci_port_base(ap);
2055 struct ahci_port_priv *pp = ap->private_data;
2058 tmp = readl(port_mmio + PORT_IRQ_STAT);
2059 writel(tmp, port_mmio + PORT_IRQ_STAT);
2060 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
2062 /* turn IRQ back on */
2063 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2066 void ahci_error_handler(struct ata_port *ap)
2068 struct ahci_host_priv *hpriv = ap->host->private_data;
2070 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
2071 /* restart engine */
2072 hpriv->stop_engine(ap);
2073 hpriv->start_engine(ap);
2076 sata_pmp_error_handler(ap);
2078 if (!ata_dev_enabled(ap->link.device))
2079 hpriv->stop_engine(ap);
2081 EXPORT_SYMBOL_GPL(ahci_error_handler);
2083 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
2085 struct ata_port *ap = qc->ap;
2087 /* make DMA engine forget about the failed command */
2088 if (qc->flags & ATA_QCFLAG_FAILED)
2089 ahci_kick_engine(ap);
2092 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
2094 struct ahci_host_priv *hpriv = ap->host->private_data;
2095 void __iomem *port_mmio = ahci_port_base(ap);
2096 struct ata_device *dev = ap->link.device;
2097 u32 devslp, dm, dito, mdat, deto, dito_conf;
2099 unsigned int err_mask;
2101 devslp = readl(port_mmio + PORT_DEVSLP);
2102 if (!(devslp & PORT_DEVSLP_DSP)) {
2103 dev_info(ap->host->dev, "port does not support device sleep\n");
2107 /* disable device sleep */
2109 if (devslp & PORT_DEVSLP_ADSE) {
2110 writel(devslp & ~PORT_DEVSLP_ADSE,
2111 port_mmio + PORT_DEVSLP);
2112 err_mask = ata_dev_set_feature(dev,
2113 SETFEATURES_SATA_DISABLE,
2115 if (err_mask && err_mask != AC_ERR_DEV)
2116 ata_dev_warn(dev, "failed to disable DEVSLP\n");
2121 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET;
2122 dito = devslp_idle_timeout / (dm + 1);
2126 dito_conf = (devslp >> PORT_DEVSLP_DITO_OFFSET) & 0x3FF;
2128 /* device sleep was already enabled and same dito */
2129 if ((devslp & PORT_DEVSLP_ADSE) && (dito_conf == dito))
2132 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */
2133 rc = hpriv->stop_engine(ap);
2137 /* Use the nominal value 10 ms if the read MDAT is zero,
2138 * the nominal value of DETO is 20 ms.
2140 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] &
2141 ATA_LOG_DEVSLP_VALID_MASK) {
2142 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] &
2143 ATA_LOG_DEVSLP_MDAT_MASK;
2146 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO];
2154 /* Make dito, mdat, deto bits to 0s */
2155 devslp &= ~GENMASK_ULL(24, 2);
2156 devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) |
2157 (mdat << PORT_DEVSLP_MDAT_OFFSET) |
2158 (deto << PORT_DEVSLP_DETO_OFFSET) |
2160 writel(devslp, port_mmio + PORT_DEVSLP);
2162 hpriv->start_engine(ap);
2164 /* enable device sleep feature for the drive */
2165 err_mask = ata_dev_set_feature(dev,
2166 SETFEATURES_SATA_ENABLE,
2168 if (err_mask && err_mask != AC_ERR_DEV)
2169 ata_dev_warn(dev, "failed to enable DEVSLP\n");
2172 static void ahci_enable_fbs(struct ata_port *ap)
2174 struct ahci_host_priv *hpriv = ap->host->private_data;
2175 struct ahci_port_priv *pp = ap->private_data;
2176 void __iomem *port_mmio = ahci_port_base(ap);
2180 if (!pp->fbs_supported)
2183 fbs = readl(port_mmio + PORT_FBS);
2184 if (fbs & PORT_FBS_EN) {
2185 pp->fbs_enabled = true;
2186 pp->fbs_last_dev = -1; /* initialization */
2190 rc = hpriv->stop_engine(ap);
2194 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS);
2195 fbs = readl(port_mmio + PORT_FBS);
2196 if (fbs & PORT_FBS_EN) {
2197 dev_info(ap->host->dev, "FBS is enabled\n");
2198 pp->fbs_enabled = true;
2199 pp->fbs_last_dev = -1; /* initialization */
2201 dev_err(ap->host->dev, "Failed to enable FBS\n");
2203 hpriv->start_engine(ap);
2206 static void ahci_disable_fbs(struct ata_port *ap)
2208 struct ahci_host_priv *hpriv = ap->host->private_data;
2209 struct ahci_port_priv *pp = ap->private_data;
2210 void __iomem *port_mmio = ahci_port_base(ap);
2214 if (!pp->fbs_supported)
2217 fbs = readl(port_mmio + PORT_FBS);
2218 if ((fbs & PORT_FBS_EN) == 0) {
2219 pp->fbs_enabled = false;
2223 rc = hpriv->stop_engine(ap);
2227 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS);
2228 fbs = readl(port_mmio + PORT_FBS);
2229 if (fbs & PORT_FBS_EN)
2230 dev_err(ap->host->dev, "Failed to disable FBS\n");
2232 dev_info(ap->host->dev, "FBS is disabled\n");
2233 pp->fbs_enabled = false;
2236 hpriv->start_engine(ap);
2239 static void ahci_pmp_attach(struct ata_port *ap)
2241 void __iomem *port_mmio = ahci_port_base(ap);
2242 struct ahci_port_priv *pp = ap->private_data;
2245 cmd = readl(port_mmio + PORT_CMD);
2246 cmd |= PORT_CMD_PMP;
2247 writel(cmd, port_mmio + PORT_CMD);
2249 ahci_enable_fbs(ap);
2251 pp->intr_mask |= PORT_IRQ_BAD_PMP;
2254 * We must not change the port interrupt mask register if the
2255 * port is marked frozen, the value in pp->intr_mask will be
2256 * restored later when the port is thawed.
2258 * Note that during initialization, the port is marked as
2259 * frozen since the irq handler is not yet registered.
2261 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2262 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2265 static void ahci_pmp_detach(struct ata_port *ap)
2267 void __iomem *port_mmio = ahci_port_base(ap);
2268 struct ahci_port_priv *pp = ap->private_data;
2271 ahci_disable_fbs(ap);
2273 cmd = readl(port_mmio + PORT_CMD);
2274 cmd &= ~PORT_CMD_PMP;
2275 writel(cmd, port_mmio + PORT_CMD);
2277 pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
2279 /* see comment above in ahci_pmp_attach() */
2280 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2281 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2284 int ahci_port_resume(struct ata_port *ap)
2286 ahci_rpm_get_port(ap);
2289 ahci_start_port(ap);
2291 if (sata_pmp_attached(ap))
2292 ahci_pmp_attach(ap);
2294 ahci_pmp_detach(ap);
2298 EXPORT_SYMBOL_GPL(ahci_port_resume);
2301 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
2303 const char *emsg = NULL;
2306 rc = ahci_deinit_port(ap, &emsg);
2308 ahci_power_down(ap);
2310 ata_port_err(ap, "%s (%d)\n", emsg, rc);
2311 ata_port_freeze(ap);
2314 ahci_rpm_put_port(ap);
2319 static int ahci_port_start(struct ata_port *ap)
2321 struct ahci_host_priv *hpriv = ap->host->private_data;
2322 struct device *dev = ap->host->dev;
2323 struct ahci_port_priv *pp;
2326 size_t dma_sz, rx_fis_sz;
2328 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
2332 if (ap->host->n_ports > 1) {
2333 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL);
2334 if (!pp->irq_desc) {
2335 devm_kfree(dev, pp);
2338 snprintf(pp->irq_desc, 8,
2339 "%s%d", dev_driver_string(dev), ap->port_no);
2342 /* check FBS capability */
2343 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) {
2344 void __iomem *port_mmio = ahci_port_base(ap);
2345 u32 cmd = readl(port_mmio + PORT_CMD);
2346 if (cmd & PORT_CMD_FBSCP)
2347 pp->fbs_supported = true;
2348 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) {
2349 dev_info(dev, "port %d can do FBS, forcing FBSCP\n",
2351 pp->fbs_supported = true;
2353 dev_warn(dev, "port %d is not capable of FBS\n",
2357 if (pp->fbs_supported) {
2358 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ;
2359 rx_fis_sz = AHCI_RX_FIS_SZ * 16;
2361 dma_sz = AHCI_PORT_PRIV_DMA_SZ;
2362 rx_fis_sz = AHCI_RX_FIS_SZ;
2365 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL);
2370 * First item in chunk of DMA memory: 32-slot command table,
2371 * 32 bytes each in size
2374 pp->cmd_slot_dma = mem_dma;
2376 mem += AHCI_CMD_SLOT_SZ;
2377 mem_dma += AHCI_CMD_SLOT_SZ;
2380 * Second item: Received-FIS area
2383 pp->rx_fis_dma = mem_dma;
2386 mem_dma += rx_fis_sz;
2389 * Third item: data area for storing a single command
2390 * and its scatter-gather table
2393 pp->cmd_tbl_dma = mem_dma;
2396 * Save off initial list of interrupts to be enabled.
2397 * This could be changed later
2399 pp->intr_mask = DEF_PORT_IRQ;
2402 * Switch to per-port locking in case each port has its own MSI vector.
2404 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2405 spin_lock_init(&pp->lock);
2406 ap->lock = &pp->lock;
2409 ap->private_data = pp;
2411 /* engage engines, captain */
2412 return ahci_port_resume(ap);
2415 static void ahci_port_stop(struct ata_port *ap)
2417 const char *emsg = NULL;
2418 struct ahci_host_priv *hpriv = ap->host->private_data;
2419 void __iomem *host_mmio = hpriv->mmio;
2422 /* de-initialize port */
2423 rc = ahci_deinit_port(ap, &emsg);
2425 ata_port_warn(ap, "%s (%d)\n", emsg, rc);
2428 * Clear GHC.IS to prevent stuck INTx after disabling MSI and
2431 writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT);
2433 ahci_rpm_put_port(ap);
2436 void ahci_print_info(struct ata_host *host, const char *scc_s)
2438 struct ahci_host_priv *hpriv = host->private_data;
2439 u32 vers, cap, cap2, impl, speed;
2440 const char *speed_s;
2442 vers = hpriv->version;
2445 impl = hpriv->port_map;
2447 speed = (cap >> 20) & 0xf;
2450 else if (speed == 2)
2452 else if (speed == 3)
2458 "AHCI %02x%02x.%02x%02x "
2459 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2462 (vers >> 24) & 0xff,
2463 (vers >> 16) & 0xff,
2467 ((cap >> 8) & 0x1f) + 1,
2481 cap & HOST_CAP_64 ? "64bit " : "",
2482 cap & HOST_CAP_NCQ ? "ncq " : "",
2483 cap & HOST_CAP_SNTF ? "sntf " : "",
2484 cap & HOST_CAP_MPS ? "ilck " : "",
2485 cap & HOST_CAP_SSS ? "stag " : "",
2486 cap & HOST_CAP_ALPM ? "pm " : "",
2487 cap & HOST_CAP_LED ? "led " : "",
2488 cap & HOST_CAP_CLO ? "clo " : "",
2489 cap & HOST_CAP_ONLY ? "only " : "",
2490 cap & HOST_CAP_PMP ? "pmp " : "",
2491 cap & HOST_CAP_FBS ? "fbs " : "",
2492 cap & HOST_CAP_PIO_MULTI ? "pio " : "",
2493 cap & HOST_CAP_SSC ? "slum " : "",
2494 cap & HOST_CAP_PART ? "part " : "",
2495 cap & HOST_CAP_CCC ? "ccc " : "",
2496 cap & HOST_CAP_EMS ? "ems " : "",
2497 cap & HOST_CAP_SXS ? "sxs " : "",
2498 cap2 & HOST_CAP2_DESO ? "deso " : "",
2499 cap2 & HOST_CAP2_SADM ? "sadm " : "",
2500 cap2 & HOST_CAP2_SDS ? "sds " : "",
2501 cap2 & HOST_CAP2_APST ? "apst " : "",
2502 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "",
2503 cap2 & HOST_CAP2_BOH ? "boh " : ""
2506 EXPORT_SYMBOL_GPL(ahci_print_info);
2508 void ahci_set_em_messages(struct ahci_host_priv *hpriv,
2509 struct ata_port_info *pi)
2512 void __iomem *mmio = hpriv->mmio;
2513 u32 em_loc = readl(mmio + HOST_EM_LOC);
2514 u32 em_ctl = readl(mmio + HOST_EM_CTL);
2516 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS))
2519 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16;
2523 hpriv->em_loc = ((em_loc >> 16) * 4);
2524 hpriv->em_buf_sz = ((em_loc & 0xff) * 4);
2525 hpriv->em_msg_type = messages;
2526 pi->flags |= ATA_FLAG_EM;
2527 if (!(em_ctl & EM_CTL_ALHD))
2528 pi->flags |= ATA_FLAG_SW_ACTIVITY;
2531 EXPORT_SYMBOL_GPL(ahci_set_em_messages);
2533 static int ahci_host_activate_multi_irqs(struct ata_host *host,
2534 struct scsi_host_template *sht)
2536 struct ahci_host_priv *hpriv = host->private_data;
2539 rc = ata_host_start(host);
2543 * Requests IRQs according to AHCI-1.1 when multiple MSIs were
2544 * allocated. That is one MSI per port, starting from @irq.
2546 for (i = 0; i < host->n_ports; i++) {
2547 struct ahci_port_priv *pp = host->ports[i]->private_data;
2548 int irq = hpriv->get_irq_vector(host, i);
2550 /* Do not receive interrupts sent by dummy ports */
2556 rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard,
2557 0, pp->irq_desc, host->ports[i]);
2561 ata_port_desc(host->ports[i], "irq %d", irq);
2564 return ata_host_register(host, sht);
2568 * ahci_host_activate - start AHCI host, request IRQs and register it
2569 * @host: target ATA host
2570 * @sht: scsi_host_template to use when registering the host
2573 * Inherited from calling layer (may sleep).
2576 * 0 on success, -errno otherwise.
2578 int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht)
2580 struct ahci_host_priv *hpriv = host->private_data;
2581 int irq = hpriv->irq;
2584 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2585 if (hpriv->irq_handler &&
2586 hpriv->irq_handler != ahci_single_level_irq_intr)
2588 "both AHCI_HFLAG_MULTI_MSI flag set and custom irq handler implemented\n");
2589 if (!hpriv->get_irq_vector) {
2591 "AHCI_HFLAG_MULTI_MSI requires ->get_irq_vector!\n");
2595 rc = ahci_host_activate_multi_irqs(host, sht);
2597 rc = ata_host_activate(host, irq, hpriv->irq_handler,
2604 EXPORT_SYMBOL_GPL(ahci_host_activate);
2606 MODULE_AUTHOR("Jeff Garzik");
2607 MODULE_DESCRIPTION("Common AHCI SATA low-level routines");
2608 MODULE_LICENSE("GPL");