2 * libahci.c - Common AHCI SATA low-level routines
8 * Copyright 2004-2005 Red Hat, Inc.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/driver-api/libata.rst
29 * AHCI hardware documentation:
30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
35 #include <linux/kernel.h>
36 #include <linux/gfp.h>
37 #include <linux/module.h>
38 #include <linux/blkdev.h>
39 #include <linux/delay.h>
40 #include <linux/interrupt.h>
41 #include <linux/dma-mapping.h>
42 #include <linux/device.h>
43 #include <scsi/scsi_host.h>
44 #include <scsi/scsi_cmnd.h>
45 #include <linux/libata.h>
46 #include <linux/pci.h>
50 static int ahci_skip_host_reset;
52 EXPORT_SYMBOL_GPL(ahci_ignore_sss);
54 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444);
55 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)");
57 module_param_named(ignore_sss, ahci_ignore_sss, int, 0444);
58 MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)");
60 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
62 static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
63 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
65 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
70 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
71 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
72 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
73 static int ahci_port_start(struct ata_port *ap);
74 static void ahci_port_stop(struct ata_port *ap);
75 static void ahci_qc_prep(struct ata_queued_cmd *qc);
76 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc);
77 static void ahci_freeze(struct ata_port *ap);
78 static void ahci_thaw(struct ata_port *ap);
79 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep);
80 static void ahci_enable_fbs(struct ata_port *ap);
81 static void ahci_disable_fbs(struct ata_port *ap);
82 static void ahci_pmp_attach(struct ata_port *ap);
83 static void ahci_pmp_detach(struct ata_port *ap);
84 static int ahci_softreset(struct ata_link *link, unsigned int *class,
85 unsigned long deadline);
86 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
87 unsigned long deadline);
88 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
89 unsigned long deadline);
90 static void ahci_postreset(struct ata_link *link, unsigned int *class);
91 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
92 static void ahci_dev_config(struct ata_device *dev);
94 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
96 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
97 static ssize_t ahci_activity_store(struct ata_device *dev,
98 enum sw_activity val);
99 static void ahci_init_sw_activity(struct ata_link *link);
101 static ssize_t ahci_show_host_caps(struct device *dev,
102 struct device_attribute *attr, char *buf);
103 static ssize_t ahci_show_host_cap2(struct device *dev,
104 struct device_attribute *attr, char *buf);
105 static ssize_t ahci_show_host_version(struct device *dev,
106 struct device_attribute *attr, char *buf);
107 static ssize_t ahci_show_port_cmd(struct device *dev,
108 struct device_attribute *attr, char *buf);
109 static ssize_t ahci_read_em_buffer(struct device *dev,
110 struct device_attribute *attr, char *buf);
111 static ssize_t ahci_store_em_buffer(struct device *dev,
112 struct device_attribute *attr,
113 const char *buf, size_t size);
114 static ssize_t ahci_show_em_supported(struct device *dev,
115 struct device_attribute *attr, char *buf);
116 static irqreturn_t ahci_single_level_irq_intr(int irq, void *dev_instance);
118 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL);
119 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL);
120 static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL);
121 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL);
122 static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO,
123 ahci_read_em_buffer, ahci_store_em_buffer);
124 static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL);
126 struct device_attribute *ahci_shost_attrs[] = {
127 &dev_attr_link_power_management_policy,
128 &dev_attr_em_message_type,
129 &dev_attr_em_message,
130 &dev_attr_ahci_host_caps,
131 &dev_attr_ahci_host_cap2,
132 &dev_attr_ahci_host_version,
133 &dev_attr_ahci_port_cmd,
135 &dev_attr_em_message_supported,
138 EXPORT_SYMBOL_GPL(ahci_shost_attrs);
140 struct device_attribute *ahci_sdev_attrs[] = {
141 &dev_attr_sw_activity,
142 &dev_attr_unload_heads,
143 &dev_attr_ncq_prio_enable,
146 EXPORT_SYMBOL_GPL(ahci_sdev_attrs);
148 struct ata_port_operations ahci_ops = {
149 .inherits = &sata_pmp_port_ops,
151 .qc_defer = ahci_pmp_qc_defer,
152 .qc_prep = ahci_qc_prep,
153 .qc_issue = ahci_qc_issue,
154 .qc_fill_rtf = ahci_qc_fill_rtf,
156 .freeze = ahci_freeze,
158 .softreset = ahci_softreset,
159 .hardreset = ahci_hardreset,
160 .postreset = ahci_postreset,
161 .pmp_softreset = ahci_softreset,
162 .error_handler = ahci_error_handler,
163 .post_internal_cmd = ahci_post_internal_cmd,
164 .dev_config = ahci_dev_config,
166 .scr_read = ahci_scr_read,
167 .scr_write = ahci_scr_write,
168 .pmp_attach = ahci_pmp_attach,
169 .pmp_detach = ahci_pmp_detach,
171 .set_lpm = ahci_set_lpm,
172 .em_show = ahci_led_show,
173 .em_store = ahci_led_store,
174 .sw_activity_show = ahci_activity_show,
175 .sw_activity_store = ahci_activity_store,
176 .transmit_led_message = ahci_transmit_led_message,
178 .port_suspend = ahci_port_suspend,
179 .port_resume = ahci_port_resume,
181 .port_start = ahci_port_start,
182 .port_stop = ahci_port_stop,
184 EXPORT_SYMBOL_GPL(ahci_ops);
186 struct ata_port_operations ahci_pmp_retry_srst_ops = {
187 .inherits = &ahci_ops,
188 .softreset = ahci_pmp_retry_softreset,
190 EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops);
192 static bool ahci_em_messages __read_mostly = true;
193 EXPORT_SYMBOL_GPL(ahci_em_messages);
194 module_param(ahci_em_messages, bool, 0444);
195 /* add other LED protocol types when they become supported */
196 MODULE_PARM_DESC(ahci_em_messages,
197 "AHCI Enclosure Management Message control (0 = off, 1 = on)");
199 /* device sleep idle timeout in ms */
200 static int devslp_idle_timeout __read_mostly = 1000;
201 module_param(devslp_idle_timeout, int, 0644);
202 MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout");
204 static void ahci_enable_ahci(void __iomem *mmio)
209 /* turn on AHCI_EN */
210 tmp = readl(mmio + HOST_CTL);
211 if (tmp & HOST_AHCI_EN)
214 /* Some controllers need AHCI_EN to be written multiple times.
215 * Try a few times before giving up.
217 for (i = 0; i < 5; i++) {
219 writel(tmp, mmio + HOST_CTL);
220 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */
221 if (tmp & HOST_AHCI_EN)
230 * ahci_rpm_get_port - Make sure the port is powered on
231 * @ap: Port to power on
233 * Whenever there is need to access the AHCI host registers outside of
234 * normal execution paths, call this function to make sure the host is
235 * actually powered on.
237 static int ahci_rpm_get_port(struct ata_port *ap)
239 return pm_runtime_get_sync(ap->dev);
243 * ahci_rpm_put_port - Undoes ahci_rpm_get_port()
244 * @ap: Port to power down
246 * Undoes ahci_rpm_get_port() and possibly powers down the AHCI host
247 * if it has no more active users.
249 static void ahci_rpm_put_port(struct ata_port *ap)
251 pm_runtime_put(ap->dev);
254 static ssize_t ahci_show_host_caps(struct device *dev,
255 struct device_attribute *attr, char *buf)
257 struct Scsi_Host *shost = class_to_shost(dev);
258 struct ata_port *ap = ata_shost_to_port(shost);
259 struct ahci_host_priv *hpriv = ap->host->private_data;
261 return sprintf(buf, "%x\n", hpriv->cap);
264 static ssize_t ahci_show_host_cap2(struct device *dev,
265 struct device_attribute *attr, char *buf)
267 struct Scsi_Host *shost = class_to_shost(dev);
268 struct ata_port *ap = ata_shost_to_port(shost);
269 struct ahci_host_priv *hpriv = ap->host->private_data;
271 return sprintf(buf, "%x\n", hpriv->cap2);
274 static ssize_t ahci_show_host_version(struct device *dev,
275 struct device_attribute *attr, char *buf)
277 struct Scsi_Host *shost = class_to_shost(dev);
278 struct ata_port *ap = ata_shost_to_port(shost);
279 struct ahci_host_priv *hpriv = ap->host->private_data;
281 return sprintf(buf, "%x\n", hpriv->version);
284 static ssize_t ahci_show_port_cmd(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 void __iomem *port_mmio = ahci_port_base(ap);
292 ahci_rpm_get_port(ap);
293 ret = sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD));
294 ahci_rpm_put_port(ap);
299 static ssize_t ahci_read_em_buffer(struct device *dev,
300 struct device_attribute *attr, char *buf)
302 struct Scsi_Host *shost = class_to_shost(dev);
303 struct ata_port *ap = ata_shost_to_port(shost);
304 struct ahci_host_priv *hpriv = ap->host->private_data;
305 void __iomem *mmio = hpriv->mmio;
306 void __iomem *em_mmio = mmio + hpriv->em_loc;
312 ahci_rpm_get_port(ap);
313 spin_lock_irqsave(ap->lock, flags);
315 em_ctl = readl(mmio + HOST_EM_CTL);
316 if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT ||
317 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) {
318 spin_unlock_irqrestore(ap->lock, flags);
319 ahci_rpm_put_port(ap);
323 if (!(em_ctl & EM_CTL_MR)) {
324 spin_unlock_irqrestore(ap->lock, flags);
325 ahci_rpm_put_port(ap);
329 if (!(em_ctl & EM_CTL_SMB))
330 em_mmio += hpriv->em_buf_sz;
332 count = hpriv->em_buf_sz;
334 /* the count should not be larger than PAGE_SIZE */
335 if (count > PAGE_SIZE) {
336 if (printk_ratelimit())
338 "EM read buffer size too large: "
339 "buffer size %u, page size %lu\n",
340 hpriv->em_buf_sz, PAGE_SIZE);
344 for (i = 0; i < count; i += 4) {
345 msg = readl(em_mmio + i);
347 buf[i + 1] = (msg >> 8) & 0xff;
348 buf[i + 2] = (msg >> 16) & 0xff;
349 buf[i + 3] = (msg >> 24) & 0xff;
352 spin_unlock_irqrestore(ap->lock, flags);
353 ahci_rpm_put_port(ap);
358 static ssize_t ahci_store_em_buffer(struct device *dev,
359 struct device_attribute *attr,
360 const char *buf, size_t size)
362 struct Scsi_Host *shost = class_to_shost(dev);
363 struct ata_port *ap = ata_shost_to_port(shost);
364 struct ahci_host_priv *hpriv = ap->host->private_data;
365 void __iomem *mmio = hpriv->mmio;
366 void __iomem *em_mmio = mmio + hpriv->em_loc;
367 const unsigned char *msg_buf = buf;
372 /* check size validity */
373 if (!(ap->flags & ATA_FLAG_EM) ||
374 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) ||
375 size % 4 || size > hpriv->em_buf_sz)
378 ahci_rpm_get_port(ap);
379 spin_lock_irqsave(ap->lock, flags);
381 em_ctl = readl(mmio + HOST_EM_CTL);
382 if (em_ctl & EM_CTL_TM) {
383 spin_unlock_irqrestore(ap->lock, flags);
384 ahci_rpm_put_port(ap);
388 for (i = 0; i < size; i += 4) {
389 msg = msg_buf[i] | msg_buf[i + 1] << 8 |
390 msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24;
391 writel(msg, em_mmio + i);
394 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
396 spin_unlock_irqrestore(ap->lock, flags);
397 ahci_rpm_put_port(ap);
402 static ssize_t ahci_show_em_supported(struct device *dev,
403 struct device_attribute *attr, char *buf)
405 struct Scsi_Host *shost = class_to_shost(dev);
406 struct ata_port *ap = ata_shost_to_port(shost);
407 struct ahci_host_priv *hpriv = ap->host->private_data;
408 void __iomem *mmio = hpriv->mmio;
411 ahci_rpm_get_port(ap);
412 em_ctl = readl(mmio + HOST_EM_CTL);
413 ahci_rpm_put_port(ap);
415 return sprintf(buf, "%s%s%s%s\n",
416 em_ctl & EM_CTL_LED ? "led " : "",
417 em_ctl & EM_CTL_SAFTE ? "saf-te " : "",
418 em_ctl & EM_CTL_SES ? "ses-2 " : "",
419 em_ctl & EM_CTL_SGPIO ? "sgpio " : "");
423 * ahci_save_initial_config - Save and fixup initial config values
424 * @dev: target AHCI device
425 * @hpriv: host private area to store config values
427 * Some registers containing configuration info might be setup by
428 * BIOS and might be cleared on reset. This function saves the
429 * initial values of those registers into @hpriv such that they
430 * can be restored after controller reset.
432 * If inconsistent, config values are fixed up by this function.
434 * If it is not set already this function sets hpriv->start_engine to
440 void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv)
442 void __iomem *mmio = hpriv->mmio;
443 u32 cap, cap2, vers, port_map;
446 /* make sure AHCI mode is enabled before accessing CAP */
447 ahci_enable_ahci(mmio);
449 /* Values prefixed with saved_ are written back to host after
450 * reset. Values without are used for driver operation.
452 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
453 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
455 /* CAP2 register is only defined for AHCI 1.2 and later */
456 vers = readl(mmio + HOST_VERSION);
457 if ((vers >> 16) > 1 ||
458 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200))
459 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2);
461 hpriv->saved_cap2 = cap2 = 0;
463 /* some chips have errata preventing 64bit use */
464 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
465 dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n");
469 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
470 dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n");
471 cap &= ~HOST_CAP_NCQ;
474 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) {
475 dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n");
479 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
480 dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n");
481 cap &= ~HOST_CAP_PMP;
484 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) {
486 "controller can't do SNTF, turning off CAP_SNTF\n");
487 cap &= ~HOST_CAP_SNTF;
490 if ((cap2 & HOST_CAP2_SDS) && (hpriv->flags & AHCI_HFLAG_NO_DEVSLP)) {
492 "controller can't do DEVSLP, turning off\n");
493 cap2 &= ~HOST_CAP2_SDS;
494 cap2 &= ~HOST_CAP2_SADM;
497 if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) {
498 dev_info(dev, "controller can do FBS, turning on CAP_FBS\n");
502 if ((cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_NO_FBS)) {
503 dev_info(dev, "controller can't do FBS, turning off CAP_FBS\n");
504 cap &= ~HOST_CAP_FBS;
507 if (!(cap & HOST_CAP_ALPM) && (hpriv->flags & AHCI_HFLAG_YES_ALPM)) {
508 dev_info(dev, "controller can do ALPM, turning on CAP_ALPM\n");
509 cap |= HOST_CAP_ALPM;
512 if (hpriv->force_port_map && port_map != hpriv->force_port_map) {
513 dev_info(dev, "forcing port_map 0x%x -> 0x%x\n",
514 port_map, hpriv->force_port_map);
515 port_map = hpriv->force_port_map;
516 hpriv->saved_port_map = port_map;
519 if (hpriv->mask_port_map) {
520 dev_warn(dev, "masking port_map 0x%x -> 0x%x\n",
522 port_map & hpriv->mask_port_map);
523 port_map &= hpriv->mask_port_map;
526 /* cross check port_map and cap.n_ports */
530 for (i = 0; i < AHCI_MAX_PORTS; i++)
531 if (port_map & (1 << i))
534 /* If PI has more ports than n_ports, whine, clear
535 * port_map and let it be generated from n_ports.
537 if (map_ports > ahci_nr_ports(cap)) {
539 "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n",
540 port_map, ahci_nr_ports(cap));
545 /* fabricate port_map from cap.nr_ports for < AHCI 1.3 */
546 if (!port_map && vers < 0x10300) {
547 port_map = (1 << ahci_nr_ports(cap)) - 1;
548 dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map);
550 /* write the fixed up value to the PI register */
551 hpriv->saved_port_map = port_map;
554 /* record values to use during operation */
557 hpriv->version = readl(mmio + HOST_VERSION);
558 hpriv->port_map = port_map;
560 if (!hpriv->start_engine)
561 hpriv->start_engine = ahci_start_engine;
563 if (!hpriv->irq_handler)
564 hpriv->irq_handler = ahci_single_level_irq_intr;
566 EXPORT_SYMBOL_GPL(ahci_save_initial_config);
569 * ahci_restore_initial_config - Restore initial config
570 * @host: target ATA host
572 * Restore initial config stored by ahci_save_initial_config().
577 static void ahci_restore_initial_config(struct ata_host *host)
579 struct ahci_host_priv *hpriv = host->private_data;
580 void __iomem *mmio = hpriv->mmio;
582 writel(hpriv->saved_cap, mmio + HOST_CAP);
583 if (hpriv->saved_cap2)
584 writel(hpriv->saved_cap2, mmio + HOST_CAP2);
585 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
586 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
589 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
591 static const int offset[] = {
592 [SCR_STATUS] = PORT_SCR_STAT,
593 [SCR_CONTROL] = PORT_SCR_CTL,
594 [SCR_ERROR] = PORT_SCR_ERR,
595 [SCR_ACTIVE] = PORT_SCR_ACT,
596 [SCR_NOTIFICATION] = PORT_SCR_NTF,
598 struct ahci_host_priv *hpriv = ap->host->private_data;
600 if (sc_reg < ARRAY_SIZE(offset) &&
601 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
602 return offset[sc_reg];
606 static int ahci_scr_read(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 *val = readl(port_mmio + offset);
618 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
620 void __iomem *port_mmio = ahci_port_base(link->ap);
621 int offset = ahci_scr_offset(link->ap, sc_reg);
624 writel(val, port_mmio + offset);
630 void ahci_start_engine(struct ata_port *ap)
632 void __iomem *port_mmio = ahci_port_base(ap);
636 tmp = readl(port_mmio + PORT_CMD);
637 tmp |= PORT_CMD_START;
638 writel(tmp, port_mmio + PORT_CMD);
639 readl(port_mmio + PORT_CMD); /* flush */
641 EXPORT_SYMBOL_GPL(ahci_start_engine);
643 int ahci_stop_engine(struct ata_port *ap)
645 void __iomem *port_mmio = ahci_port_base(ap);
646 struct ahci_host_priv *hpriv = ap->host->private_data;
650 * On some controllers, stopping a port's DMA engine while the port
651 * is in ALPM state (partial or slumber) results in failures on
652 * subsequent DMA engine starts. For those controllers, put the
653 * port back in active state before stopping its DMA engine.
655 if ((hpriv->flags & AHCI_HFLAG_WAKE_BEFORE_STOP) &&
656 (ap->link.lpm_policy > ATA_LPM_MAX_POWER) &&
657 ahci_set_lpm(&ap->link, ATA_LPM_MAX_POWER, ATA_LPM_WAKE_ONLY)) {
658 dev_err(ap->host->dev, "Failed to wake up port before engine stop\n");
662 tmp = readl(port_mmio + PORT_CMD);
664 /* check if the HBA is idle */
665 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
669 * Don't try to issue commands but return with ENODEV if the
670 * AHCI controller not available anymore (e.g. due to PCIe hot
671 * unplugging). Otherwise a 500ms delay for each port is added.
673 if (tmp == 0xffffffff) {
674 dev_err(ap->host->dev, "AHCI controller unavailable!\n");
678 /* setting HBA to idle */
679 tmp &= ~PORT_CMD_START;
680 writel(tmp, port_mmio + PORT_CMD);
682 /* wait for engine to stop. This could be as long as 500 msec */
683 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
684 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
685 if (tmp & PORT_CMD_LIST_ON)
690 EXPORT_SYMBOL_GPL(ahci_stop_engine);
692 void ahci_start_fis_rx(struct ata_port *ap)
694 void __iomem *port_mmio = ahci_port_base(ap);
695 struct ahci_host_priv *hpriv = ap->host->private_data;
696 struct ahci_port_priv *pp = ap->private_data;
699 /* set FIS registers */
700 if (hpriv->cap & HOST_CAP_64)
701 writel((pp->cmd_slot_dma >> 16) >> 16,
702 port_mmio + PORT_LST_ADDR_HI);
703 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
705 if (hpriv->cap & HOST_CAP_64)
706 writel((pp->rx_fis_dma >> 16) >> 16,
707 port_mmio + PORT_FIS_ADDR_HI);
708 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
710 /* enable FIS reception */
711 tmp = readl(port_mmio + PORT_CMD);
712 tmp |= PORT_CMD_FIS_RX;
713 writel(tmp, port_mmio + PORT_CMD);
716 readl(port_mmio + PORT_CMD);
718 EXPORT_SYMBOL_GPL(ahci_start_fis_rx);
720 static int ahci_stop_fis_rx(struct ata_port *ap)
722 void __iomem *port_mmio = ahci_port_base(ap);
725 /* disable FIS reception */
726 tmp = readl(port_mmio + PORT_CMD);
727 tmp &= ~PORT_CMD_FIS_RX;
728 writel(tmp, port_mmio + PORT_CMD);
730 /* wait for completion, spec says 500ms, give it 1000 */
731 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
732 PORT_CMD_FIS_ON, 10, 1000);
733 if (tmp & PORT_CMD_FIS_ON)
739 static void ahci_power_up(struct ata_port *ap)
741 struct ahci_host_priv *hpriv = ap->host->private_data;
742 void __iomem *port_mmio = ahci_port_base(ap);
745 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
748 if (hpriv->cap & HOST_CAP_SSS) {
749 cmd |= PORT_CMD_SPIN_UP;
750 writel(cmd, port_mmio + PORT_CMD);
754 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
757 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
760 struct ata_port *ap = link->ap;
761 struct ahci_host_priv *hpriv = ap->host->private_data;
762 struct ahci_port_priv *pp = ap->private_data;
763 void __iomem *port_mmio = ahci_port_base(ap);
765 if (policy != ATA_LPM_MAX_POWER) {
766 /* wakeup flag only applies to the max power policy */
767 hints &= ~ATA_LPM_WAKE_ONLY;
770 * Disable interrupts on Phy Ready. This keeps us from
771 * getting woken up due to spurious phy ready
774 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
775 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
777 sata_link_scr_lpm(link, policy, false);
780 if (hpriv->cap & HOST_CAP_ALPM) {
781 u32 cmd = readl(port_mmio + PORT_CMD);
783 if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) {
784 if (!(hints & ATA_LPM_WAKE_ONLY))
785 cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE);
786 cmd |= PORT_CMD_ICC_ACTIVE;
788 writel(cmd, port_mmio + PORT_CMD);
789 readl(port_mmio + PORT_CMD);
791 /* wait 10ms to be sure we've come out of LPM state */
794 if (hints & ATA_LPM_WAKE_ONLY)
797 cmd |= PORT_CMD_ALPE;
798 if (policy == ATA_LPM_MIN_POWER)
801 /* write out new cmd value */
802 writel(cmd, port_mmio + PORT_CMD);
806 /* set aggressive device sleep */
807 if ((hpriv->cap2 & HOST_CAP2_SDS) &&
808 (hpriv->cap2 & HOST_CAP2_SADM) &&
809 (link->device->flags & ATA_DFLAG_DEVSLP)) {
810 if (policy == ATA_LPM_MIN_POWER)
811 ahci_set_aggressive_devslp(ap, true);
813 ahci_set_aggressive_devslp(ap, false);
816 if (policy == ATA_LPM_MAX_POWER) {
817 sata_link_scr_lpm(link, policy, false);
819 /* turn PHYRDY IRQ back on */
820 pp->intr_mask |= PORT_IRQ_PHYRDY;
821 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
828 static void ahci_power_down(struct ata_port *ap)
830 struct ahci_host_priv *hpriv = ap->host->private_data;
831 void __iomem *port_mmio = ahci_port_base(ap);
834 if (!(hpriv->cap & HOST_CAP_SSS))
837 /* put device into listen mode, first set PxSCTL.DET to 0 */
838 scontrol = readl(port_mmio + PORT_SCR_CTL);
840 writel(scontrol, port_mmio + PORT_SCR_CTL);
842 /* then set PxCMD.SUD to 0 */
843 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
844 cmd &= ~PORT_CMD_SPIN_UP;
845 writel(cmd, port_mmio + PORT_CMD);
849 static void ahci_start_port(struct ata_port *ap)
851 struct ahci_host_priv *hpriv = ap->host->private_data;
852 struct ahci_port_priv *pp = ap->private_data;
853 struct ata_link *link;
854 struct ahci_em_priv *emp;
858 /* enable FIS reception */
859 ahci_start_fis_rx(ap);
862 if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE))
863 hpriv->start_engine(ap);
866 if (ap->flags & ATA_FLAG_EM) {
867 ata_for_each_link(link, ap, EDGE) {
868 emp = &pp->em_priv[link->pmp];
870 /* EM Transmit bit maybe busy during init */
871 for (i = 0; i < EM_MAX_RETRY; i++) {
872 rc = ap->ops->transmit_led_message(ap,
876 * If busy, give a breather but do not
877 * release EH ownership by using msleep()
878 * instead of ata_msleep(). EM Transmit
879 * bit is busy for the whole host and
880 * releasing ownership will cause other
881 * ports to fail the same way.
891 if (ap->flags & ATA_FLAG_SW_ACTIVITY)
892 ata_for_each_link(link, ap, EDGE)
893 ahci_init_sw_activity(link);
897 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
902 rc = ahci_stop_engine(ap);
904 *emsg = "failed to stop engine";
908 /* disable FIS reception */
909 rc = ahci_stop_fis_rx(ap);
911 *emsg = "failed stop FIS RX";
918 int ahci_reset_controller(struct ata_host *host)
920 struct ahci_host_priv *hpriv = host->private_data;
921 void __iomem *mmio = hpriv->mmio;
924 /* we must be in AHCI mode, before using anything
925 * AHCI-specific, such as HOST_RESET.
927 ahci_enable_ahci(mmio);
929 /* global controller reset */
930 if (!ahci_skip_host_reset) {
931 tmp = readl(mmio + HOST_CTL);
932 if ((tmp & HOST_RESET) == 0) {
933 writel(tmp | HOST_RESET, mmio + HOST_CTL);
934 readl(mmio + HOST_CTL); /* flush */
938 * to perform host reset, OS should set HOST_RESET
939 * and poll until this bit is read to be "0".
940 * reset must complete within 1 second, or
941 * the hardware should be considered fried.
943 tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET,
944 HOST_RESET, 10, 1000);
946 if (tmp & HOST_RESET) {
947 dev_err(host->dev, "controller reset failed (0x%x)\n",
952 /* turn on AHCI mode */
953 ahci_enable_ahci(mmio);
955 /* Some registers might be cleared on reset. Restore
958 if (!(hpriv->flags & AHCI_HFLAG_NO_WRITE_TO_RO))
959 ahci_restore_initial_config(host);
961 dev_info(host->dev, "skipping global host reset\n");
965 EXPORT_SYMBOL_GPL(ahci_reset_controller);
967 static void ahci_sw_activity(struct ata_link *link)
969 struct ata_port *ap = link->ap;
970 struct ahci_port_priv *pp = ap->private_data;
971 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
973 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
977 if (!timer_pending(&emp->timer))
978 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
981 static void ahci_sw_activity_blink(struct timer_list *t)
983 struct ahci_em_priv *emp = from_timer(emp, t, timer);
984 struct ata_link *link = emp->link;
985 struct ata_port *ap = link->ap;
987 unsigned long led_message = emp->led_state;
988 u32 activity_led_state;
991 led_message &= EM_MSG_LED_VALUE;
992 led_message |= ap->port_no | (link->pmp << 8);
994 /* check to see if we've had activity. If so,
995 * toggle state of LED and reset timer. If not,
996 * turn LED to desired idle state.
998 spin_lock_irqsave(ap->lock, flags);
999 if (emp->saved_activity != emp->activity) {
1000 emp->saved_activity = emp->activity;
1001 /* get the current LED state */
1002 activity_led_state = led_message & EM_MSG_LED_VALUE_ON;
1004 if (activity_led_state)
1005 activity_led_state = 0;
1007 activity_led_state = 1;
1009 /* clear old state */
1010 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1013 led_message |= (activity_led_state << 16);
1014 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
1016 /* switch to idle */
1017 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1018 if (emp->blink_policy == BLINK_OFF)
1019 led_message |= (1 << 16);
1021 spin_unlock_irqrestore(ap->lock, flags);
1022 ap->ops->transmit_led_message(ap, led_message, 4);
1025 static void ahci_init_sw_activity(struct ata_link *link)
1027 struct ata_port *ap = link->ap;
1028 struct ahci_port_priv *pp = ap->private_data;
1029 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1031 /* init activity stats, setup timer */
1032 emp->saved_activity = emp->activity = 0;
1034 timer_setup(&emp->timer, ahci_sw_activity_blink, 0);
1036 /* check our blink policy and set flag for link if it's enabled */
1037 if (emp->blink_policy)
1038 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1041 int ahci_reset_em(struct ata_host *host)
1043 struct ahci_host_priv *hpriv = host->private_data;
1044 void __iomem *mmio = hpriv->mmio;
1047 em_ctl = readl(mmio + HOST_EM_CTL);
1048 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
1051 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
1054 EXPORT_SYMBOL_GPL(ahci_reset_em);
1056 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
1059 struct ahci_host_priv *hpriv = ap->host->private_data;
1060 struct ahci_port_priv *pp = ap->private_data;
1061 void __iomem *mmio = hpriv->mmio;
1063 u32 message[] = {0, 0};
1064 unsigned long flags;
1066 struct ahci_em_priv *emp;
1068 /* get the slot number from the message */
1069 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1070 if (pmp < EM_MAX_SLOTS)
1071 emp = &pp->em_priv[pmp];
1075 ahci_rpm_get_port(ap);
1076 spin_lock_irqsave(ap->lock, flags);
1079 * if we are still busy transmitting a previous message,
1082 em_ctl = readl(mmio + HOST_EM_CTL);
1083 if (em_ctl & EM_CTL_TM) {
1084 spin_unlock_irqrestore(ap->lock, flags);
1085 ahci_rpm_put_port(ap);
1089 if (hpriv->em_msg_type & EM_MSG_TYPE_LED) {
1091 * create message header - this is all zero except for
1092 * the message size, which is 4 bytes.
1094 message[0] |= (4 << 8);
1096 /* ignore 0:4 of byte zero, fill in port info yourself */
1097 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no);
1099 /* write message to EM_LOC */
1100 writel(message[0], mmio + hpriv->em_loc);
1101 writel(message[1], mmio + hpriv->em_loc+4);
1104 * tell hardware to transmit the message
1106 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
1109 /* save off new led state for port/slot */
1110 emp->led_state = state;
1112 spin_unlock_irqrestore(ap->lock, flags);
1113 ahci_rpm_put_port(ap);
1118 static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
1120 struct ahci_port_priv *pp = ap->private_data;
1121 struct ata_link *link;
1122 struct ahci_em_priv *emp;
1125 ata_for_each_link(link, ap, EDGE) {
1126 emp = &pp->em_priv[link->pmp];
1127 rc += sprintf(buf, "%lx\n", emp->led_state);
1132 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
1137 struct ahci_port_priv *pp = ap->private_data;
1138 struct ahci_em_priv *emp;
1140 if (kstrtouint(buf, 0, &state) < 0)
1143 /* get the slot number from the message */
1144 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1145 if (pmp < EM_MAX_SLOTS)
1146 emp = &pp->em_priv[pmp];
1150 /* mask off the activity bits if we are in sw_activity
1151 * mode, user should turn off sw_activity before setting
1152 * activity led through em_message
1154 if (emp->blink_policy)
1155 state &= ~EM_MSG_LED_VALUE_ACTIVITY;
1157 return ap->ops->transmit_led_message(ap, state, size);
1160 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
1162 struct ata_link *link = dev->link;
1163 struct ata_port *ap = link->ap;
1164 struct ahci_port_priv *pp = ap->private_data;
1165 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1166 u32 port_led_state = emp->led_state;
1168 /* save the desired Activity LED behavior */
1171 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
1173 /* set the LED to OFF */
1174 port_led_state &= EM_MSG_LED_VALUE_OFF;
1175 port_led_state |= (ap->port_no | (link->pmp << 8));
1176 ap->ops->transmit_led_message(ap, port_led_state, 4);
1178 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1179 if (val == BLINK_OFF) {
1180 /* set LED to ON for idle */
1181 port_led_state &= EM_MSG_LED_VALUE_OFF;
1182 port_led_state |= (ap->port_no | (link->pmp << 8));
1183 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */
1184 ap->ops->transmit_led_message(ap, port_led_state, 4);
1187 emp->blink_policy = val;
1191 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
1193 struct ata_link *link = dev->link;
1194 struct ata_port *ap = link->ap;
1195 struct ahci_port_priv *pp = ap->private_data;
1196 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1198 /* display the saved value of activity behavior for this
1201 return sprintf(buf, "%d\n", emp->blink_policy);
1204 static void ahci_port_init(struct device *dev, struct ata_port *ap,
1205 int port_no, void __iomem *mmio,
1206 void __iomem *port_mmio)
1208 struct ahci_host_priv *hpriv = ap->host->private_data;
1209 const char *emsg = NULL;
1213 /* make sure port is not active */
1214 rc = ahci_deinit_port(ap, &emsg);
1216 dev_warn(dev, "%s (%d)\n", emsg, rc);
1219 tmp = readl(port_mmio + PORT_SCR_ERR);
1220 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1221 writel(tmp, port_mmio + PORT_SCR_ERR);
1223 /* clear port IRQ */
1224 tmp = readl(port_mmio + PORT_IRQ_STAT);
1225 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1227 writel(tmp, port_mmio + PORT_IRQ_STAT);
1229 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1231 /* mark esata ports */
1232 tmp = readl(port_mmio + PORT_CMD);
1233 if ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS))
1234 ap->pflags |= ATA_PFLAG_EXTERNAL;
1237 void ahci_init_controller(struct ata_host *host)
1239 struct ahci_host_priv *hpriv = host->private_data;
1240 void __iomem *mmio = hpriv->mmio;
1242 void __iomem *port_mmio;
1245 for (i = 0; i < host->n_ports; i++) {
1246 struct ata_port *ap = host->ports[i];
1248 port_mmio = ahci_port_base(ap);
1249 if (ata_port_is_dummy(ap))
1252 ahci_port_init(host->dev, ap, i, mmio, port_mmio);
1255 tmp = readl(mmio + HOST_CTL);
1256 VPRINTK("HOST_CTL 0x%x\n", tmp);
1257 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1258 tmp = readl(mmio + HOST_CTL);
1259 VPRINTK("HOST_CTL 0x%x\n", tmp);
1261 EXPORT_SYMBOL_GPL(ahci_init_controller);
1263 static void ahci_dev_config(struct ata_device *dev)
1265 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1267 if (hpriv->flags & AHCI_HFLAG_SECT255) {
1268 dev->max_sectors = 255;
1270 "SB600 AHCI: limiting to 255 sectors per cmd\n");
1274 unsigned int ahci_dev_classify(struct ata_port *ap)
1276 void __iomem *port_mmio = ahci_port_base(ap);
1277 struct ata_taskfile tf;
1280 tmp = readl(port_mmio + PORT_SIG);
1281 tf.lbah = (tmp >> 24) & 0xff;
1282 tf.lbam = (tmp >> 16) & 0xff;
1283 tf.lbal = (tmp >> 8) & 0xff;
1284 tf.nsect = (tmp) & 0xff;
1286 return ata_dev_classify(&tf);
1288 EXPORT_SYMBOL_GPL(ahci_dev_classify);
1290 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1293 dma_addr_t cmd_tbl_dma;
1295 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1297 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1298 pp->cmd_slot[tag].status = 0;
1299 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1300 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1302 EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot);
1304 int ahci_kick_engine(struct ata_port *ap)
1306 void __iomem *port_mmio = ahci_port_base(ap);
1307 struct ahci_host_priv *hpriv = ap->host->private_data;
1308 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1313 rc = ahci_stop_engine(ap);
1318 * always do CLO if PMP is attached (AHCI-1.3 9.2)
1320 busy = status & (ATA_BUSY | ATA_DRQ);
1321 if (!busy && !sata_pmp_attached(ap)) {
1326 if (!(hpriv->cap & HOST_CAP_CLO)) {
1332 tmp = readl(port_mmio + PORT_CMD);
1333 tmp |= PORT_CMD_CLO;
1334 writel(tmp, port_mmio + PORT_CMD);
1337 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
1338 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1339 if (tmp & PORT_CMD_CLO)
1342 /* restart engine */
1344 hpriv->start_engine(ap);
1347 EXPORT_SYMBOL_GPL(ahci_kick_engine);
1349 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1350 struct ata_taskfile *tf, int is_cmd, u16 flags,
1351 unsigned long timeout_msec)
1353 const u32 cmd_fis_len = 5; /* five dwords */
1354 struct ahci_port_priv *pp = ap->private_data;
1355 void __iomem *port_mmio = ahci_port_base(ap);
1356 u8 *fis = pp->cmd_tbl;
1359 /* prep the command */
1360 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1361 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1363 /* set port value for softreset of Port Multiplier */
1364 if (pp->fbs_enabled && pp->fbs_last_dev != pmp) {
1365 tmp = readl(port_mmio + PORT_FBS);
1366 tmp &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
1367 tmp |= pmp << PORT_FBS_DEV_OFFSET;
1368 writel(tmp, port_mmio + PORT_FBS);
1369 pp->fbs_last_dev = pmp;
1373 writel(1, port_mmio + PORT_CMD_ISSUE);
1376 tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE,
1377 0x1, 0x1, 1, timeout_msec);
1379 ahci_kick_engine(ap);
1383 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1388 int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1389 int pmp, unsigned long deadline,
1390 int (*check_ready)(struct ata_link *link))
1392 struct ata_port *ap = link->ap;
1393 struct ahci_host_priv *hpriv = ap->host->private_data;
1394 struct ahci_port_priv *pp = ap->private_data;
1395 const char *reason = NULL;
1396 unsigned long now, msecs;
1397 struct ata_taskfile tf;
1398 bool fbs_disabled = false;
1403 /* prepare for SRST (AHCI-1.1 10.4.1) */
1404 rc = ahci_kick_engine(ap);
1405 if (rc && rc != -EOPNOTSUPP)
1406 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc);
1409 * According to AHCI-1.2 9.3.9: if FBS is enable, software shall
1410 * clear PxFBS.EN to '0' prior to issuing software reset to devices
1411 * that is attached to port multiplier.
1413 if (!ata_is_host_link(link) && pp->fbs_enabled) {
1414 ahci_disable_fbs(ap);
1415 fbs_disabled = true;
1418 ata_tf_init(link->device, &tf);
1420 /* issue the first H2D Register FIS */
1423 if (time_after(deadline, now))
1424 msecs = jiffies_to_msecs(deadline - now);
1427 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1428 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1430 reason = "1st FIS failed";
1434 /* spec says at least 5us, but be generous and sleep for 1ms */
1437 /* issue the second H2D Register FIS */
1438 tf.ctl &= ~ATA_SRST;
1439 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1441 /* wait for link to become ready */
1442 rc = ata_wait_after_reset(link, deadline, check_ready);
1443 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) {
1445 * Workaround for cases where link online status can't
1446 * be trusted. Treat device readiness timeout as link
1449 ata_link_info(link, "device not ready, treating as offline\n");
1450 *class = ATA_DEV_NONE;
1452 /* link occupied, -ENODEV too is an error */
1453 reason = "device not ready";
1456 *class = ahci_dev_classify(ap);
1458 /* re-enable FBS if disabled before */
1460 ahci_enable_fbs(ap);
1462 DPRINTK("EXIT, class=%u\n", *class);
1466 ata_link_err(link, "softreset failed (%s)\n", reason);
1470 int ahci_check_ready(struct ata_link *link)
1472 void __iomem *port_mmio = ahci_port_base(link->ap);
1473 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1475 return ata_check_ready(status);
1477 EXPORT_SYMBOL_GPL(ahci_check_ready);
1479 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1480 unsigned long deadline)
1482 int pmp = sata_srst_pmp(link);
1486 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
1488 EXPORT_SYMBOL_GPL(ahci_do_softreset);
1490 static int ahci_bad_pmp_check_ready(struct ata_link *link)
1492 void __iomem *port_mmio = ahci_port_base(link->ap);
1493 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1494 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT);
1497 * There is no need to check TFDATA if BAD PMP is found due to HW bug,
1498 * which can save timeout delay.
1500 if (irq_status & PORT_IRQ_BAD_PMP)
1503 return ata_check_ready(status);
1506 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
1507 unsigned long deadline)
1509 struct ata_port *ap = link->ap;
1510 void __iomem *port_mmio = ahci_port_base(ap);
1511 int pmp = sata_srst_pmp(link);
1517 rc = ahci_do_softreset(link, class, pmp, deadline,
1518 ahci_bad_pmp_check_ready);
1521 * Soft reset fails with IPMS set when PMP is enabled but
1522 * SATA HDD/ODD is connected to SATA port, do soft reset
1526 irq_sts = readl(port_mmio + PORT_IRQ_STAT);
1527 if (irq_sts & PORT_IRQ_BAD_PMP) {
1529 "applying PMP SRST workaround "
1531 rc = ahci_do_softreset(link, class, 0, deadline,
1539 int ahci_do_hardreset(struct ata_link *link, unsigned int *class,
1540 unsigned long deadline, bool *online)
1542 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
1543 struct ata_port *ap = link->ap;
1544 struct ahci_port_priv *pp = ap->private_data;
1545 struct ahci_host_priv *hpriv = ap->host->private_data;
1546 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1547 struct ata_taskfile tf;
1552 ahci_stop_engine(ap);
1554 /* clear D2H reception area to properly wait for D2H FIS */
1555 ata_tf_init(link->device, &tf);
1556 tf.command = ATA_BUSY;
1557 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1559 rc = sata_link_hardreset(link, timing, deadline, online,
1562 hpriv->start_engine(ap);
1565 *class = ahci_dev_classify(ap);
1567 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1570 EXPORT_SYMBOL_GPL(ahci_do_hardreset);
1572 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1573 unsigned long deadline)
1577 return ahci_do_hardreset(link, class, deadline, &online);
1580 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1582 struct ata_port *ap = link->ap;
1583 void __iomem *port_mmio = ahci_port_base(ap);
1586 ata_std_postreset(link, class);
1588 /* Make sure port's ATAPI bit is set appropriately */
1589 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1590 if (*class == ATA_DEV_ATAPI)
1591 new_tmp |= PORT_CMD_ATAPI;
1593 new_tmp &= ~PORT_CMD_ATAPI;
1594 if (new_tmp != tmp) {
1595 writel(new_tmp, port_mmio + PORT_CMD);
1596 readl(port_mmio + PORT_CMD); /* flush */
1600 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1602 struct scatterlist *sg;
1603 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1609 * Next, the S/G list.
1611 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1612 dma_addr_t addr = sg_dma_address(sg);
1613 u32 sg_len = sg_dma_len(sg);
1615 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
1616 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
1617 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
1623 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc)
1625 struct ata_port *ap = qc->ap;
1626 struct ahci_port_priv *pp = ap->private_data;
1628 if (!sata_pmp_attached(ap) || pp->fbs_enabled)
1629 return ata_std_qc_defer(qc);
1631 return sata_pmp_qc_defer_cmd_switch(qc);
1634 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1636 struct ata_port *ap = qc->ap;
1637 struct ahci_port_priv *pp = ap->private_data;
1638 int is_atapi = ata_is_atapi(qc->tf.protocol);
1641 const u32 cmd_fis_len = 5; /* five dwords */
1642 unsigned int n_elem;
1645 * Fill in command table information. First, the header,
1646 * a SATA Register - Host to Device command FIS.
1648 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1650 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1652 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1653 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1657 if (qc->flags & ATA_QCFLAG_DMAMAP)
1658 n_elem = ahci_fill_sg(qc, cmd_tbl);
1661 * Fill in command slot information.
1663 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1664 if (qc->tf.flags & ATA_TFLAG_WRITE)
1665 opts |= AHCI_CMD_WRITE;
1667 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1669 ahci_fill_cmd_slot(pp, qc->tag, opts);
1672 static void ahci_fbs_dec_intr(struct ata_port *ap)
1674 struct ahci_port_priv *pp = ap->private_data;
1675 void __iomem *port_mmio = ahci_port_base(ap);
1676 u32 fbs = readl(port_mmio + PORT_FBS);
1680 BUG_ON(!pp->fbs_enabled);
1682 /* time to wait for DEC is not specified by AHCI spec,
1683 * add a retry loop for safety.
1685 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS);
1686 fbs = readl(port_mmio + PORT_FBS);
1687 while ((fbs & PORT_FBS_DEC) && retries--) {
1689 fbs = readl(port_mmio + PORT_FBS);
1692 if (fbs & PORT_FBS_DEC)
1693 dev_err(ap->host->dev, "failed to clear device error\n");
1696 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1698 struct ahci_host_priv *hpriv = ap->host->private_data;
1699 struct ahci_port_priv *pp = ap->private_data;
1700 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1701 struct ata_link *link = NULL;
1702 struct ata_queued_cmd *active_qc;
1703 struct ata_eh_info *active_ehi;
1704 bool fbs_need_dec = false;
1707 /* determine active link with error */
1708 if (pp->fbs_enabled) {
1709 void __iomem *port_mmio = ahci_port_base(ap);
1710 u32 fbs = readl(port_mmio + PORT_FBS);
1711 int pmp = fbs >> PORT_FBS_DWE_OFFSET;
1713 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) {
1714 link = &ap->pmp_link[pmp];
1715 fbs_need_dec = true;
1719 ata_for_each_link(link, ap, EDGE)
1720 if (ata_link_active(link))
1726 active_qc = ata_qc_from_tag(ap, link->active_tag);
1727 active_ehi = &link->eh_info;
1729 /* record irq stat */
1730 ata_ehi_clear_desc(host_ehi);
1731 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1733 /* AHCI needs SError cleared; otherwise, it might lock up */
1734 ahci_scr_read(&ap->link, SCR_ERROR, &serror);
1735 ahci_scr_write(&ap->link, SCR_ERROR, serror);
1736 host_ehi->serror |= serror;
1738 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1739 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1740 irq_stat &= ~PORT_IRQ_IF_ERR;
1742 if (irq_stat & PORT_IRQ_TF_ERR) {
1743 /* If qc is active, charge it; otherwise, the active
1744 * link. There's no active qc on NCQ errors. It will
1745 * be determined by EH by reading log page 10h.
1748 active_qc->err_mask |= AC_ERR_DEV;
1750 active_ehi->err_mask |= AC_ERR_DEV;
1752 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1753 host_ehi->serror &= ~SERR_INTERNAL;
1756 if (irq_stat & PORT_IRQ_UNK_FIS) {
1757 u32 *unk = pp->rx_fis + RX_FIS_UNK;
1759 active_ehi->err_mask |= AC_ERR_HSM;
1760 active_ehi->action |= ATA_EH_RESET;
1761 ata_ehi_push_desc(active_ehi,
1762 "unknown FIS %08x %08x %08x %08x" ,
1763 unk[0], unk[1], unk[2], unk[3]);
1766 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) {
1767 active_ehi->err_mask |= AC_ERR_HSM;
1768 active_ehi->action |= ATA_EH_RESET;
1769 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1772 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1773 host_ehi->err_mask |= AC_ERR_HOST_BUS;
1774 host_ehi->action |= ATA_EH_RESET;
1775 ata_ehi_push_desc(host_ehi, "host bus error");
1778 if (irq_stat & PORT_IRQ_IF_ERR) {
1780 active_ehi->err_mask |= AC_ERR_DEV;
1782 host_ehi->err_mask |= AC_ERR_ATA_BUS;
1783 host_ehi->action |= ATA_EH_RESET;
1786 ata_ehi_push_desc(host_ehi, "interface fatal error");
1789 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1790 ata_ehi_hotplugged(host_ehi);
1791 ata_ehi_push_desc(host_ehi, "%s",
1792 irq_stat & PORT_IRQ_CONNECT ?
1793 "connection status changed" : "PHY RDY changed");
1796 /* okay, let's hand over to EH */
1798 if (irq_stat & PORT_IRQ_FREEZE)
1799 ata_port_freeze(ap);
1800 else if (fbs_need_dec) {
1801 ata_link_abort(link);
1802 ahci_fbs_dec_intr(ap);
1807 static void ahci_handle_port_interrupt(struct ata_port *ap,
1808 void __iomem *port_mmio, u32 status)
1810 struct ata_eh_info *ehi = &ap->link.eh_info;
1811 struct ahci_port_priv *pp = ap->private_data;
1812 struct ahci_host_priv *hpriv = ap->host->private_data;
1813 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
1817 /* ignore BAD_PMP while resetting */
1818 if (unlikely(resetting))
1819 status &= ~PORT_IRQ_BAD_PMP;
1821 if (sata_lpm_ignore_phy_events(&ap->link)) {
1822 status &= ~PORT_IRQ_PHYRDY;
1823 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
1826 if (unlikely(status & PORT_IRQ_ERROR)) {
1827 ahci_error_intr(ap, status);
1831 if (status & PORT_IRQ_SDB_FIS) {
1832 /* If SNotification is available, leave notification
1833 * handling to sata_async_notification(). If not,
1834 * emulate it by snooping SDB FIS RX area.
1836 * Snooping FIS RX area is probably cheaper than
1837 * poking SNotification but some constrollers which
1838 * implement SNotification, ICH9 for example, don't
1839 * store AN SDB FIS into receive area.
1841 if (hpriv->cap & HOST_CAP_SNTF)
1842 sata_async_notification(ap);
1844 /* If the 'N' bit in word 0 of the FIS is set,
1845 * we just received asynchronous notification.
1846 * Tell libata about it.
1848 * Lack of SNotification should not appear in
1849 * ahci 1.2, so the workaround is unnecessary
1850 * when FBS is enabled.
1852 if (pp->fbs_enabled)
1855 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1856 u32 f0 = le32_to_cpu(f[0]);
1858 sata_async_notification(ap);
1863 /* pp->active_link is not reliable once FBS is enabled, both
1864 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because
1865 * NCQ and non-NCQ commands may be in flight at the same time.
1867 if (pp->fbs_enabled) {
1868 if (ap->qc_active) {
1869 qc_active = readl(port_mmio + PORT_SCR_ACT);
1870 qc_active |= readl(port_mmio + PORT_CMD_ISSUE);
1873 /* pp->active_link is valid iff any command is in flight */
1874 if (ap->qc_active && pp->active_link->sactive)
1875 qc_active = readl(port_mmio + PORT_SCR_ACT);
1877 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1881 rc = ata_qc_complete_multiple(ap, qc_active);
1883 /* while resetting, invalid completions are expected */
1884 if (unlikely(rc < 0 && !resetting)) {
1885 ehi->err_mask |= AC_ERR_HSM;
1886 ehi->action |= ATA_EH_RESET;
1887 ata_port_freeze(ap);
1891 static void ahci_port_intr(struct ata_port *ap)
1893 void __iomem *port_mmio = ahci_port_base(ap);
1896 status = readl(port_mmio + PORT_IRQ_STAT);
1897 writel(status, port_mmio + PORT_IRQ_STAT);
1899 ahci_handle_port_interrupt(ap, port_mmio, status);
1902 static irqreturn_t ahci_multi_irqs_intr_hard(int irq, void *dev_instance)
1904 struct ata_port *ap = dev_instance;
1905 void __iomem *port_mmio = ahci_port_base(ap);
1910 status = readl(port_mmio + PORT_IRQ_STAT);
1911 writel(status, port_mmio + PORT_IRQ_STAT);
1913 spin_lock(ap->lock);
1914 ahci_handle_port_interrupt(ap, port_mmio, status);
1915 spin_unlock(ap->lock);
1922 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked)
1924 unsigned int i, handled = 0;
1926 for (i = 0; i < host->n_ports; i++) {
1927 struct ata_port *ap;
1929 if (!(irq_masked & (1 << i)))
1932 ap = host->ports[i];
1935 VPRINTK("port %u\n", i);
1937 VPRINTK("port %u (no irq)\n", 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;
1960 hpriv = host->private_data;
1963 /* sigh. 0xffffffff is a valid return from h/w */
1964 irq_stat = readl(mmio + HOST_IRQ_STAT);
1968 irq_masked = irq_stat & hpriv->port_map;
1970 spin_lock(&host->lock);
1972 rc = ahci_handle_port_intr(host, irq_masked);
1974 /* HOST_IRQ_STAT behaves as level triggered latch meaning that
1975 * it should be cleared after all the port events are cleared;
1976 * otherwise, it will raise a spurious interrupt after each
1977 * valid one. Please read section 10.6.2 of ahci 1.1 for more
1980 * Also, use the unmasked value to clear interrupt as spurious
1981 * pending event on a dummy port might cause screaming IRQ.
1983 writel(irq_stat, mmio + HOST_IRQ_STAT);
1985 spin_unlock(&host->lock);
1989 return IRQ_RETVAL(rc);
1992 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1994 struct ata_port *ap = qc->ap;
1995 void __iomem *port_mmio = ahci_port_base(ap);
1996 struct ahci_port_priv *pp = ap->private_data;
1998 /* Keep track of the currently active link. It will be used
1999 * in completion path to determine whether NCQ phase is in
2002 pp->active_link = qc->dev->link;
2004 if (ata_is_ncq(qc->tf.protocol))
2005 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
2007 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) {
2008 u32 fbs = readl(port_mmio + PORT_FBS);
2009 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
2010 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET;
2011 writel(fbs, port_mmio + PORT_FBS);
2012 pp->fbs_last_dev = qc->dev->link->pmp;
2015 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
2017 ahci_sw_activity(qc->dev->link);
2021 EXPORT_SYMBOL_GPL(ahci_qc_issue);
2023 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
2025 struct ahci_port_priv *pp = qc->ap->private_data;
2026 u8 *rx_fis = pp->rx_fis;
2028 if (pp->fbs_enabled)
2029 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
2032 * After a successful execution of an ATA PIO data-in command,
2033 * the device doesn't send D2H Reg FIS to update the TF and
2034 * the host should take TF and E_Status from the preceding PIO
2037 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE &&
2038 !(qc->flags & ATA_QCFLAG_FAILED)) {
2039 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
2040 qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15];
2042 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);
2047 static void ahci_freeze(struct ata_port *ap)
2049 void __iomem *port_mmio = ahci_port_base(ap);
2052 writel(0, port_mmio + PORT_IRQ_MASK);
2055 static void ahci_thaw(struct ata_port *ap)
2057 struct ahci_host_priv *hpriv = ap->host->private_data;
2058 void __iomem *mmio = hpriv->mmio;
2059 void __iomem *port_mmio = ahci_port_base(ap);
2061 struct ahci_port_priv *pp = ap->private_data;
2064 tmp = readl(port_mmio + PORT_IRQ_STAT);
2065 writel(tmp, port_mmio + PORT_IRQ_STAT);
2066 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
2068 /* turn IRQ back on */
2069 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2072 void ahci_error_handler(struct ata_port *ap)
2074 struct ahci_host_priv *hpriv = ap->host->private_data;
2076 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
2077 /* restart engine */
2078 ahci_stop_engine(ap);
2079 hpriv->start_engine(ap);
2082 sata_pmp_error_handler(ap);
2084 if (!ata_dev_enabled(ap->link.device))
2085 ahci_stop_engine(ap);
2087 EXPORT_SYMBOL_GPL(ahci_error_handler);
2089 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
2091 struct ata_port *ap = qc->ap;
2093 /* make DMA engine forget about the failed command */
2094 if (qc->flags & ATA_QCFLAG_FAILED)
2095 ahci_kick_engine(ap);
2098 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
2100 struct ahci_host_priv *hpriv = ap->host->private_data;
2101 void __iomem *port_mmio = ahci_port_base(ap);
2102 struct ata_device *dev = ap->link.device;
2103 u32 devslp, dm, dito, mdat, deto;
2105 unsigned int err_mask;
2107 devslp = readl(port_mmio + PORT_DEVSLP);
2108 if (!(devslp & PORT_DEVSLP_DSP)) {
2109 dev_info(ap->host->dev, "port does not support device sleep\n");
2113 /* disable device sleep */
2115 if (devslp & PORT_DEVSLP_ADSE) {
2116 writel(devslp & ~PORT_DEVSLP_ADSE,
2117 port_mmio + PORT_DEVSLP);
2118 err_mask = ata_dev_set_feature(dev,
2119 SETFEATURES_SATA_DISABLE,
2121 if (err_mask && err_mask != AC_ERR_DEV)
2122 ata_dev_warn(dev, "failed to disable DEVSLP\n");
2127 /* device sleep was already enabled */
2128 if (devslp & PORT_DEVSLP_ADSE)
2131 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */
2132 rc = ahci_stop_engine(ap);
2136 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET;
2137 dito = devslp_idle_timeout / (dm + 1);
2141 /* Use the nominal value 10 ms if the read MDAT is zero,
2142 * the nominal value of DETO is 20 ms.
2144 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] &
2145 ATA_LOG_DEVSLP_VALID_MASK) {
2146 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] &
2147 ATA_LOG_DEVSLP_MDAT_MASK;
2150 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO];
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 = ahci_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 = ahci_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 int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
2305 const char *emsg = NULL;
2308 rc = ahci_deinit_port(ap, &emsg);
2310 ahci_power_down(ap);
2312 ata_port_err(ap, "%s (%d)\n", emsg, rc);
2313 ata_port_freeze(ap);
2316 ahci_rpm_put_port(ap);
2321 static int ahci_port_start(struct ata_port *ap)
2323 struct ahci_host_priv *hpriv = ap->host->private_data;
2324 struct device *dev = ap->host->dev;
2325 struct ahci_port_priv *pp;
2328 size_t dma_sz, rx_fis_sz;
2330 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
2334 if (ap->host->n_ports > 1) {
2335 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL);
2336 if (!pp->irq_desc) {
2337 devm_kfree(dev, pp);
2340 snprintf(pp->irq_desc, 8,
2341 "%s%d", dev_driver_string(dev), ap->port_no);
2344 /* check FBS capability */
2345 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) {
2346 void __iomem *port_mmio = ahci_port_base(ap);
2347 u32 cmd = readl(port_mmio + PORT_CMD);
2348 if (cmd & PORT_CMD_FBSCP)
2349 pp->fbs_supported = true;
2350 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) {
2351 dev_info(dev, "port %d can do FBS, forcing FBSCP\n",
2353 pp->fbs_supported = true;
2355 dev_warn(dev, "port %d is not capable of FBS\n",
2359 if (pp->fbs_supported) {
2360 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ;
2361 rx_fis_sz = AHCI_RX_FIS_SZ * 16;
2363 dma_sz = AHCI_PORT_PRIV_DMA_SZ;
2364 rx_fis_sz = AHCI_RX_FIS_SZ;
2367 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL);
2370 memset(mem, 0, dma_sz);
2373 * First item in chunk of DMA memory: 32-slot command table,
2374 * 32 bytes each in size
2377 pp->cmd_slot_dma = mem_dma;
2379 mem += AHCI_CMD_SLOT_SZ;
2380 mem_dma += AHCI_CMD_SLOT_SZ;
2383 * Second item: Received-FIS area
2386 pp->rx_fis_dma = mem_dma;
2389 mem_dma += rx_fis_sz;
2392 * Third item: data area for storing a single command
2393 * and its scatter-gather table
2396 pp->cmd_tbl_dma = mem_dma;
2399 * Save off initial list of interrupts to be enabled.
2400 * This could be changed later
2402 pp->intr_mask = DEF_PORT_IRQ;
2405 * Switch to per-port locking in case each port has its own MSI vector.
2407 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2408 spin_lock_init(&pp->lock);
2409 ap->lock = &pp->lock;
2412 ap->private_data = pp;
2414 /* engage engines, captain */
2415 return ahci_port_resume(ap);
2418 static void ahci_port_stop(struct ata_port *ap)
2420 const char *emsg = NULL;
2421 struct ahci_host_priv *hpriv = ap->host->private_data;
2422 void __iomem *host_mmio = hpriv->mmio;
2425 /* de-initialize port */
2426 rc = ahci_deinit_port(ap, &emsg);
2428 ata_port_warn(ap, "%s (%d)\n", emsg, rc);
2431 * Clear GHC.IS to prevent stuck INTx after disabling MSI and
2434 writel(1 << ap->port_no, host_mmio + HOST_IRQ_STAT);
2437 void ahci_print_info(struct ata_host *host, const char *scc_s)
2439 struct ahci_host_priv *hpriv = host->private_data;
2440 u32 vers, cap, cap2, impl, speed;
2441 const char *speed_s;
2443 vers = hpriv->version;
2446 impl = hpriv->port_map;
2448 speed = (cap >> 20) & 0xf;
2451 else if (speed == 2)
2453 else if (speed == 3)
2459 "AHCI %02x%02x.%02x%02x "
2460 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2463 (vers >> 24) & 0xff,
2464 (vers >> 16) & 0xff,
2468 ((cap >> 8) & 0x1f) + 1,
2482 cap & HOST_CAP_64 ? "64bit " : "",
2483 cap & HOST_CAP_NCQ ? "ncq " : "",
2484 cap & HOST_CAP_SNTF ? "sntf " : "",
2485 cap & HOST_CAP_MPS ? "ilck " : "",
2486 cap & HOST_CAP_SSS ? "stag " : "",
2487 cap & HOST_CAP_ALPM ? "pm " : "",
2488 cap & HOST_CAP_LED ? "led " : "",
2489 cap & HOST_CAP_CLO ? "clo " : "",
2490 cap & HOST_CAP_ONLY ? "only " : "",
2491 cap & HOST_CAP_PMP ? "pmp " : "",
2492 cap & HOST_CAP_FBS ? "fbs " : "",
2493 cap & HOST_CAP_PIO_MULTI ? "pio " : "",
2494 cap & HOST_CAP_SSC ? "slum " : "",
2495 cap & HOST_CAP_PART ? "part " : "",
2496 cap & HOST_CAP_CCC ? "ccc " : "",
2497 cap & HOST_CAP_EMS ? "ems " : "",
2498 cap & HOST_CAP_SXS ? "sxs " : "",
2499 cap2 & HOST_CAP2_DESO ? "deso " : "",
2500 cap2 & HOST_CAP2_SADM ? "sadm " : "",
2501 cap2 & HOST_CAP2_SDS ? "sds " : "",
2502 cap2 & HOST_CAP2_APST ? "apst " : "",
2503 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "",
2504 cap2 & HOST_CAP2_BOH ? "boh " : ""
2507 EXPORT_SYMBOL_GPL(ahci_print_info);
2509 void ahci_set_em_messages(struct ahci_host_priv *hpriv,
2510 struct ata_port_info *pi)
2513 void __iomem *mmio = hpriv->mmio;
2514 u32 em_loc = readl(mmio + HOST_EM_LOC);
2515 u32 em_ctl = readl(mmio + HOST_EM_CTL);
2517 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS))
2520 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16;
2524 hpriv->em_loc = ((em_loc >> 16) * 4);
2525 hpriv->em_buf_sz = ((em_loc & 0xff) * 4);
2526 hpriv->em_msg_type = messages;
2527 pi->flags |= ATA_FLAG_EM;
2528 if (!(em_ctl & EM_CTL_ALHD))
2529 pi->flags |= ATA_FLAG_SW_ACTIVITY;
2532 EXPORT_SYMBOL_GPL(ahci_set_em_messages);
2534 static int ahci_host_activate_multi_irqs(struct ata_host *host,
2535 struct scsi_host_template *sht)
2537 struct ahci_host_priv *hpriv = host->private_data;
2540 rc = ata_host_start(host);
2544 * Requests IRQs according to AHCI-1.1 when multiple MSIs were
2545 * allocated. That is one MSI per port, starting from @irq.
2547 for (i = 0; i < host->n_ports; i++) {
2548 struct ahci_port_priv *pp = host->ports[i]->private_data;
2549 int irq = hpriv->get_irq_vector(host, i);
2551 /* Do not receive interrupts sent by dummy ports */
2557 rc = devm_request_irq(host->dev, irq, ahci_multi_irqs_intr_hard,
2558 0, pp->irq_desc, host->ports[i]);
2562 ata_port_desc(host->ports[i], "irq %d", irq);
2565 return ata_host_register(host, sht);
2569 * ahci_host_activate - start AHCI host, request IRQs and register it
2570 * @host: target ATA host
2571 * @sht: scsi_host_template to use when registering the host
2574 * Inherited from calling layer (may sleep).
2577 * 0 on success, -errno otherwise.
2579 int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht)
2581 struct ahci_host_priv *hpriv = host->private_data;
2582 int irq = hpriv->irq;
2585 if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {
2586 if (hpriv->irq_handler)
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");