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/DocBook/libata.*
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/init.h>
39 #include <linux/blkdev.h>
40 #include <linux/delay.h>
41 #include <linux/interrupt.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/device.h>
44 #include <scsi/scsi_host.h>
45 #include <scsi/scsi_cmnd.h>
46 #include <linux/libata.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 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
73 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
74 static int ahci_port_start(struct ata_port *ap);
75 static void ahci_port_stop(struct ata_port *ap);
76 static void ahci_qc_prep(struct ata_queued_cmd *qc);
77 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc);
78 static void ahci_freeze(struct ata_port *ap);
79 static void ahci_thaw(struct ata_port *ap);
80 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep);
81 static void ahci_enable_fbs(struct ata_port *ap);
82 static void ahci_disable_fbs(struct ata_port *ap);
83 static void ahci_pmp_attach(struct ata_port *ap);
84 static void ahci_pmp_detach(struct ata_port *ap);
85 static int ahci_softreset(struct ata_link *link, unsigned int *class,
86 unsigned long deadline);
87 static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
88 unsigned long deadline);
89 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
90 unsigned long deadline);
91 static void ahci_postreset(struct ata_link *link, unsigned int *class);
92 static void ahci_error_handler(struct ata_port *ap);
93 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
94 static void ahci_dev_config(struct ata_device *dev);
96 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
98 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
99 static ssize_t ahci_activity_store(struct ata_device *dev,
100 enum sw_activity val);
101 static void ahci_init_sw_activity(struct ata_link *link);
103 static ssize_t ahci_show_host_caps(struct device *dev,
104 struct device_attribute *attr, char *buf);
105 static ssize_t ahci_show_host_cap2(struct device *dev,
106 struct device_attribute *attr, char *buf);
107 static ssize_t ahci_show_host_version(struct device *dev,
108 struct device_attribute *attr, char *buf);
109 static ssize_t ahci_show_port_cmd(struct device *dev,
110 struct device_attribute *attr, char *buf);
111 static ssize_t ahci_read_em_buffer(struct device *dev,
112 struct device_attribute *attr, char *buf);
113 static ssize_t ahci_store_em_buffer(struct device *dev,
114 struct device_attribute *attr,
115 const char *buf, size_t size);
116 static ssize_t ahci_show_em_supported(struct device *dev,
117 struct device_attribute *attr, char *buf);
119 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL);
120 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL);
121 static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL);
122 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL);
123 static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO,
124 ahci_read_em_buffer, ahci_store_em_buffer);
125 static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL);
127 struct device_attribute *ahci_shost_attrs[] = {
128 &dev_attr_link_power_management_policy,
129 &dev_attr_em_message_type,
130 &dev_attr_em_message,
131 &dev_attr_ahci_host_caps,
132 &dev_attr_ahci_host_cap2,
133 &dev_attr_ahci_host_version,
134 &dev_attr_ahci_port_cmd,
136 &dev_attr_em_message_supported,
139 EXPORT_SYMBOL_GPL(ahci_shost_attrs);
141 struct device_attribute *ahci_sdev_attrs[] = {
142 &dev_attr_sw_activity,
143 &dev_attr_unload_heads,
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 int ahci_em_messages = 1;
193 EXPORT_SYMBOL_GPL(ahci_em_messages);
194 module_param(ahci_em_messages, int, 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 int devslp_idle_timeout = 1000; /* device sleep idle timeout in ms */
200 module_param(devslp_idle_timeout, int, 0644);
201 MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout");
203 static void ahci_enable_ahci(void __iomem *mmio)
208 /* turn on AHCI_EN */
209 tmp = readl(mmio + HOST_CTL);
210 if (tmp & HOST_AHCI_EN)
213 /* Some controllers need AHCI_EN to be written multiple times.
214 * Try a few times before giving up.
216 for (i = 0; i < 5; i++) {
218 writel(tmp, mmio + HOST_CTL);
219 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */
220 if (tmp & HOST_AHCI_EN)
228 static ssize_t ahci_show_host_caps(struct device *dev,
229 struct device_attribute *attr, char *buf)
231 struct Scsi_Host *shost = class_to_shost(dev);
232 struct ata_port *ap = ata_shost_to_port(shost);
233 struct ahci_host_priv *hpriv = ap->host->private_data;
235 return sprintf(buf, "%x\n", hpriv->cap);
238 static ssize_t ahci_show_host_cap2(struct device *dev,
239 struct device_attribute *attr, char *buf)
241 struct Scsi_Host *shost = class_to_shost(dev);
242 struct ata_port *ap = ata_shost_to_port(shost);
243 struct ahci_host_priv *hpriv = ap->host->private_data;
245 return sprintf(buf, "%x\n", hpriv->cap2);
248 static ssize_t ahci_show_host_version(struct device *dev,
249 struct device_attribute *attr, char *buf)
251 struct Scsi_Host *shost = class_to_shost(dev);
252 struct ata_port *ap = ata_shost_to_port(shost);
253 struct ahci_host_priv *hpriv = ap->host->private_data;
254 void __iomem *mmio = hpriv->mmio;
256 return sprintf(buf, "%x\n", readl(mmio + HOST_VERSION));
259 static ssize_t ahci_show_port_cmd(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 void __iomem *port_mmio = ahci_port_base(ap);
266 return sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD));
269 static ssize_t ahci_read_em_buffer(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 struct ahci_host_priv *hpriv = ap->host->private_data;
275 void __iomem *mmio = hpriv->mmio;
276 void __iomem *em_mmio = mmio + hpriv->em_loc;
282 spin_lock_irqsave(ap->lock, flags);
284 em_ctl = readl(mmio + HOST_EM_CTL);
285 if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT ||
286 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) {
287 spin_unlock_irqrestore(ap->lock, flags);
291 if (!(em_ctl & EM_CTL_MR)) {
292 spin_unlock_irqrestore(ap->lock, flags);
296 if (!(em_ctl & EM_CTL_SMB))
297 em_mmio += hpriv->em_buf_sz;
299 count = hpriv->em_buf_sz;
301 /* the count should not be larger than PAGE_SIZE */
302 if (count > PAGE_SIZE) {
303 if (printk_ratelimit())
305 "EM read buffer size too large: "
306 "buffer size %u, page size %lu\n",
307 hpriv->em_buf_sz, PAGE_SIZE);
311 for (i = 0; i < count; i += 4) {
312 msg = readl(em_mmio + i);
314 buf[i + 1] = (msg >> 8) & 0xff;
315 buf[i + 2] = (msg >> 16) & 0xff;
316 buf[i + 3] = (msg >> 24) & 0xff;
319 spin_unlock_irqrestore(ap->lock, flags);
324 static ssize_t ahci_store_em_buffer(struct device *dev,
325 struct device_attribute *attr,
326 const char *buf, size_t size)
328 struct Scsi_Host *shost = class_to_shost(dev);
329 struct ata_port *ap = ata_shost_to_port(shost);
330 struct ahci_host_priv *hpriv = ap->host->private_data;
331 void __iomem *mmio = hpriv->mmio;
332 void __iomem *em_mmio = mmio + hpriv->em_loc;
333 const unsigned char *msg_buf = buf;
338 /* check size validity */
339 if (!(ap->flags & ATA_FLAG_EM) ||
340 !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) ||
341 size % 4 || size > hpriv->em_buf_sz)
344 spin_lock_irqsave(ap->lock, flags);
346 em_ctl = readl(mmio + HOST_EM_CTL);
347 if (em_ctl & EM_CTL_TM) {
348 spin_unlock_irqrestore(ap->lock, flags);
352 for (i = 0; i < size; i += 4) {
353 msg = msg_buf[i] | msg_buf[i + 1] << 8 |
354 msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24;
355 writel(msg, em_mmio + i);
358 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
360 spin_unlock_irqrestore(ap->lock, flags);
365 static ssize_t ahci_show_em_supported(struct device *dev,
366 struct device_attribute *attr, char *buf)
368 struct Scsi_Host *shost = class_to_shost(dev);
369 struct ata_port *ap = ata_shost_to_port(shost);
370 struct ahci_host_priv *hpriv = ap->host->private_data;
371 void __iomem *mmio = hpriv->mmio;
374 em_ctl = readl(mmio + HOST_EM_CTL);
376 return sprintf(buf, "%s%s%s%s\n",
377 em_ctl & EM_CTL_LED ? "led " : "",
378 em_ctl & EM_CTL_SAFTE ? "saf-te " : "",
379 em_ctl & EM_CTL_SES ? "ses-2 " : "",
380 em_ctl & EM_CTL_SGPIO ? "sgpio " : "");
384 * ahci_save_initial_config - Save and fixup initial config values
385 * @dev: target AHCI device
386 * @hpriv: host private area to store config values
387 * @force_port_map: force port map to a specified value
388 * @mask_port_map: mask out particular bits from port map
390 * Some registers containing configuration info might be setup by
391 * BIOS and might be cleared on reset. This function saves the
392 * initial values of those registers into @hpriv such that they
393 * can be restored after controller reset.
395 * If inconsistent, config values are fixed up by this function.
400 void ahci_save_initial_config(struct device *dev,
401 struct ahci_host_priv *hpriv,
402 unsigned int force_port_map,
403 unsigned int mask_port_map)
405 void __iomem *mmio = hpriv->mmio;
406 u32 cap, cap2, vers, port_map;
409 /* make sure AHCI mode is enabled before accessing CAP */
410 ahci_enable_ahci(mmio);
412 /* Values prefixed with saved_ are written back to host after
413 * reset. Values without are used for driver operation.
415 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
416 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
418 /* CAP2 register is only defined for AHCI 1.2 and later */
419 vers = readl(mmio + HOST_VERSION);
420 if ((vers >> 16) > 1 ||
421 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200))
422 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2);
424 hpriv->saved_cap2 = cap2 = 0;
426 /* some chips have errata preventing 64bit use */
427 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
428 dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n");
432 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
433 dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n");
434 cap &= ~HOST_CAP_NCQ;
437 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) {
438 dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n");
442 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
443 dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n");
444 cap &= ~HOST_CAP_PMP;
447 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) {
449 "controller can't do SNTF, turning off CAP_SNTF\n");
450 cap &= ~HOST_CAP_SNTF;
453 if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) {
454 dev_info(dev, "controller can do FBS, turning on CAP_FBS\n");
458 if (force_port_map && port_map != force_port_map) {
459 dev_info(dev, "forcing port_map 0x%x -> 0x%x\n",
460 port_map, force_port_map);
461 port_map = force_port_map;
465 dev_warn(dev, "masking port_map 0x%x -> 0x%x\n",
467 port_map & mask_port_map);
468 port_map &= mask_port_map;
471 /* cross check port_map and cap.n_ports */
475 for (i = 0; i < AHCI_MAX_PORTS; i++)
476 if (port_map & (1 << i))
479 /* If PI has more ports than n_ports, whine, clear
480 * port_map and let it be generated from n_ports.
482 if (map_ports > ahci_nr_ports(cap)) {
484 "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n",
485 port_map, ahci_nr_ports(cap));
490 /* fabricate port_map from cap.nr_ports */
492 port_map = (1 << ahci_nr_ports(cap)) - 1;
493 dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map);
495 /* write the fixed up value to the PI register */
496 hpriv->saved_port_map = port_map;
499 /* record values to use during operation */
502 hpriv->port_map = port_map;
504 EXPORT_SYMBOL_GPL(ahci_save_initial_config);
507 * ahci_restore_initial_config - Restore initial config
508 * @host: target ATA host
510 * Restore initial config stored by ahci_save_initial_config().
515 static void ahci_restore_initial_config(struct ata_host *host)
517 struct ahci_host_priv *hpriv = host->private_data;
518 void __iomem *mmio = hpriv->mmio;
520 writel(hpriv->saved_cap, mmio + HOST_CAP);
521 if (hpriv->saved_cap2)
522 writel(hpriv->saved_cap2, mmio + HOST_CAP2);
523 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
524 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
527 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
529 static const int offset[] = {
530 [SCR_STATUS] = PORT_SCR_STAT,
531 [SCR_CONTROL] = PORT_SCR_CTL,
532 [SCR_ERROR] = PORT_SCR_ERR,
533 [SCR_ACTIVE] = PORT_SCR_ACT,
534 [SCR_NOTIFICATION] = PORT_SCR_NTF,
536 struct ahci_host_priv *hpriv = ap->host->private_data;
538 if (sc_reg < ARRAY_SIZE(offset) &&
539 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
540 return offset[sc_reg];
544 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
546 void __iomem *port_mmio = ahci_port_base(link->ap);
547 int offset = ahci_scr_offset(link->ap, sc_reg);
550 *val = readl(port_mmio + offset);
556 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
558 void __iomem *port_mmio = ahci_port_base(link->ap);
559 int offset = ahci_scr_offset(link->ap, sc_reg);
562 writel(val, port_mmio + offset);
568 void ahci_start_engine(struct ata_port *ap)
570 void __iomem *port_mmio = ahci_port_base(ap);
574 tmp = readl(port_mmio + PORT_CMD);
575 tmp |= PORT_CMD_START;
576 writel(tmp, port_mmio + PORT_CMD);
577 readl(port_mmio + PORT_CMD); /* flush */
579 EXPORT_SYMBOL_GPL(ahci_start_engine);
581 int ahci_stop_engine(struct ata_port *ap)
583 void __iomem *port_mmio = ahci_port_base(ap);
586 tmp = readl(port_mmio + PORT_CMD);
588 /* check if the HBA is idle */
589 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
592 /* setting HBA to idle */
593 tmp &= ~PORT_CMD_START;
594 writel(tmp, port_mmio + PORT_CMD);
596 /* wait for engine to stop. This could be as long as 500 msec */
597 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
598 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
599 if (tmp & PORT_CMD_LIST_ON)
604 EXPORT_SYMBOL_GPL(ahci_stop_engine);
606 static void ahci_start_fis_rx(struct ata_port *ap)
608 void __iomem *port_mmio = ahci_port_base(ap);
609 struct ahci_host_priv *hpriv = ap->host->private_data;
610 struct ahci_port_priv *pp = ap->private_data;
613 /* set FIS registers */
614 if (hpriv->cap & HOST_CAP_64)
615 writel((pp->cmd_slot_dma >> 16) >> 16,
616 port_mmio + PORT_LST_ADDR_HI);
617 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
619 if (hpriv->cap & HOST_CAP_64)
620 writel((pp->rx_fis_dma >> 16) >> 16,
621 port_mmio + PORT_FIS_ADDR_HI);
622 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
624 /* enable FIS reception */
625 tmp = readl(port_mmio + PORT_CMD);
626 tmp |= PORT_CMD_FIS_RX;
627 writel(tmp, port_mmio + PORT_CMD);
630 readl(port_mmio + PORT_CMD);
633 static int ahci_stop_fis_rx(struct ata_port *ap)
635 void __iomem *port_mmio = ahci_port_base(ap);
638 /* disable FIS reception */
639 tmp = readl(port_mmio + PORT_CMD);
640 tmp &= ~PORT_CMD_FIS_RX;
641 writel(tmp, port_mmio + PORT_CMD);
643 /* wait for completion, spec says 500ms, give it 1000 */
644 tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
645 PORT_CMD_FIS_ON, 10, 1000);
646 if (tmp & PORT_CMD_FIS_ON)
652 static void ahci_power_up(struct ata_port *ap)
654 struct ahci_host_priv *hpriv = ap->host->private_data;
655 void __iomem *port_mmio = ahci_port_base(ap);
658 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
661 if (hpriv->cap & HOST_CAP_SSS) {
662 cmd |= PORT_CMD_SPIN_UP;
663 writel(cmd, port_mmio + PORT_CMD);
667 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
670 static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
673 struct ata_port *ap = link->ap;
674 struct ahci_host_priv *hpriv = ap->host->private_data;
675 struct ahci_port_priv *pp = ap->private_data;
676 void __iomem *port_mmio = ahci_port_base(ap);
678 if (policy != ATA_LPM_MAX_POWER) {
680 * Disable interrupts on Phy Ready. This keeps us from
681 * getting woken up due to spurious phy ready
684 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
685 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
687 sata_link_scr_lpm(link, policy, false);
690 if (hpriv->cap & HOST_CAP_ALPM) {
691 u32 cmd = readl(port_mmio + PORT_CMD);
693 if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) {
694 cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE);
695 cmd |= PORT_CMD_ICC_ACTIVE;
697 writel(cmd, port_mmio + PORT_CMD);
698 readl(port_mmio + PORT_CMD);
700 /* wait 10ms to be sure we've come out of LPM state */
703 cmd |= PORT_CMD_ALPE;
704 if (policy == ATA_LPM_MIN_POWER)
707 /* write out new cmd value */
708 writel(cmd, port_mmio + PORT_CMD);
712 /* set aggressive device sleep */
713 if ((hpriv->cap2 & HOST_CAP2_SDS) &&
714 (hpriv->cap2 & HOST_CAP2_SADM) &&
715 (link->device->flags & ATA_DFLAG_DEVSLP)) {
716 if (policy == ATA_LPM_MIN_POWER)
717 ahci_set_aggressive_devslp(ap, true);
719 ahci_set_aggressive_devslp(ap, false);
722 if (policy == ATA_LPM_MAX_POWER) {
723 sata_link_scr_lpm(link, policy, false);
725 /* turn PHYRDY IRQ back on */
726 pp->intr_mask |= PORT_IRQ_PHYRDY;
727 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
734 static void ahci_power_down(struct ata_port *ap)
736 struct ahci_host_priv *hpriv = ap->host->private_data;
737 void __iomem *port_mmio = ahci_port_base(ap);
740 if (!(hpriv->cap & HOST_CAP_SSS))
743 /* put device into listen mode, first set PxSCTL.DET to 0 */
744 scontrol = readl(port_mmio + PORT_SCR_CTL);
746 writel(scontrol, port_mmio + PORT_SCR_CTL);
748 /* then set PxCMD.SUD to 0 */
749 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
750 cmd &= ~PORT_CMD_SPIN_UP;
751 writel(cmd, port_mmio + PORT_CMD);
755 static void ahci_start_port(struct ata_port *ap)
757 struct ahci_host_priv *hpriv = ap->host->private_data;
758 struct ahci_port_priv *pp = ap->private_data;
759 struct ata_link *link;
760 struct ahci_em_priv *emp;
764 /* enable FIS reception */
765 ahci_start_fis_rx(ap);
768 if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE))
769 ahci_start_engine(ap);
772 if (ap->flags & ATA_FLAG_EM) {
773 ata_for_each_link(link, ap, EDGE) {
774 emp = &pp->em_priv[link->pmp];
776 /* EM Transmit bit maybe busy during init */
777 for (i = 0; i < EM_MAX_RETRY; i++) {
778 rc = ap->ops->transmit_led_message(ap,
782 * If busy, give a breather but do not
783 * release EH ownership by using msleep()
784 * instead of ata_msleep(). EM Transmit
785 * bit is busy for the whole host and
786 * releasing ownership will cause other
787 * ports to fail the same way.
797 if (ap->flags & ATA_FLAG_SW_ACTIVITY)
798 ata_for_each_link(link, ap, EDGE)
799 ahci_init_sw_activity(link);
803 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
808 rc = ahci_stop_engine(ap);
810 *emsg = "failed to stop engine";
814 /* disable FIS reception */
815 rc = ahci_stop_fis_rx(ap);
817 *emsg = "failed stop FIS RX";
824 int ahci_reset_controller(struct ata_host *host)
826 struct ahci_host_priv *hpriv = host->private_data;
827 void __iomem *mmio = hpriv->mmio;
830 /* we must be in AHCI mode, before using anything
831 * AHCI-specific, such as HOST_RESET.
833 ahci_enable_ahci(mmio);
835 /* global controller reset */
836 if (!ahci_skip_host_reset) {
837 tmp = readl(mmio + HOST_CTL);
838 if ((tmp & HOST_RESET) == 0) {
839 writel(tmp | HOST_RESET, mmio + HOST_CTL);
840 readl(mmio + HOST_CTL); /* flush */
844 * to perform host reset, OS should set HOST_RESET
845 * and poll until this bit is read to be "0".
846 * reset must complete within 1 second, or
847 * the hardware should be considered fried.
849 tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET,
850 HOST_RESET, 10, 1000);
852 if (tmp & HOST_RESET) {
853 dev_err(host->dev, "controller reset failed (0x%x)\n",
858 /* turn on AHCI mode */
859 ahci_enable_ahci(mmio);
861 /* Some registers might be cleared on reset. Restore
864 ahci_restore_initial_config(host);
866 dev_info(host->dev, "skipping global host reset\n");
870 EXPORT_SYMBOL_GPL(ahci_reset_controller);
872 static void ahci_sw_activity(struct ata_link *link)
874 struct ata_port *ap = link->ap;
875 struct ahci_port_priv *pp = ap->private_data;
876 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
878 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
882 if (!timer_pending(&emp->timer))
883 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
886 static void ahci_sw_activity_blink(unsigned long arg)
888 struct ata_link *link = (struct ata_link *)arg;
889 struct ata_port *ap = link->ap;
890 struct ahci_port_priv *pp = ap->private_data;
891 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
892 unsigned long led_message = emp->led_state;
893 u32 activity_led_state;
896 led_message &= EM_MSG_LED_VALUE;
897 led_message |= ap->port_no | (link->pmp << 8);
899 /* check to see if we've had activity. If so,
900 * toggle state of LED and reset timer. If not,
901 * turn LED to desired idle state.
903 spin_lock_irqsave(ap->lock, flags);
904 if (emp->saved_activity != emp->activity) {
905 emp->saved_activity = emp->activity;
906 /* get the current LED state */
907 activity_led_state = led_message & EM_MSG_LED_VALUE_ON;
909 if (activity_led_state)
910 activity_led_state = 0;
912 activity_led_state = 1;
914 /* clear old state */
915 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
918 led_message |= (activity_led_state << 16);
919 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
922 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
923 if (emp->blink_policy == BLINK_OFF)
924 led_message |= (1 << 16);
926 spin_unlock_irqrestore(ap->lock, flags);
927 ap->ops->transmit_led_message(ap, led_message, 4);
930 static void ahci_init_sw_activity(struct ata_link *link)
932 struct ata_port *ap = link->ap;
933 struct ahci_port_priv *pp = ap->private_data;
934 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
936 /* init activity stats, setup timer */
937 emp->saved_activity = emp->activity = 0;
938 setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link);
940 /* check our blink policy and set flag for link if it's enabled */
941 if (emp->blink_policy)
942 link->flags |= ATA_LFLAG_SW_ACTIVITY;
945 int ahci_reset_em(struct ata_host *host)
947 struct ahci_host_priv *hpriv = host->private_data;
948 void __iomem *mmio = hpriv->mmio;
951 em_ctl = readl(mmio + HOST_EM_CTL);
952 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
955 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
958 EXPORT_SYMBOL_GPL(ahci_reset_em);
960 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
963 struct ahci_host_priv *hpriv = ap->host->private_data;
964 struct ahci_port_priv *pp = ap->private_data;
965 void __iomem *mmio = hpriv->mmio;
967 u32 message[] = {0, 0};
970 struct ahci_em_priv *emp;
972 /* get the slot number from the message */
973 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
974 if (pmp < EM_MAX_SLOTS)
975 emp = &pp->em_priv[pmp];
979 spin_lock_irqsave(ap->lock, flags);
982 * if we are still busy transmitting a previous message,
985 em_ctl = readl(mmio + HOST_EM_CTL);
986 if (em_ctl & EM_CTL_TM) {
987 spin_unlock_irqrestore(ap->lock, flags);
991 if (hpriv->em_msg_type & EM_MSG_TYPE_LED) {
993 * create message header - this is all zero except for
994 * the message size, which is 4 bytes.
996 message[0] |= (4 << 8);
998 /* ignore 0:4 of byte zero, fill in port info yourself */
999 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no);
1001 /* write message to EM_LOC */
1002 writel(message[0], mmio + hpriv->em_loc);
1003 writel(message[1], mmio + hpriv->em_loc+4);
1006 * tell hardware to transmit the message
1008 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
1011 /* save off new led state for port/slot */
1012 emp->led_state = state;
1014 spin_unlock_irqrestore(ap->lock, flags);
1018 static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
1020 struct ahci_port_priv *pp = ap->private_data;
1021 struct ata_link *link;
1022 struct ahci_em_priv *emp;
1025 ata_for_each_link(link, ap, EDGE) {
1026 emp = &pp->em_priv[link->pmp];
1027 rc += sprintf(buf, "%lx\n", emp->led_state);
1032 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
1037 struct ahci_port_priv *pp = ap->private_data;
1038 struct ahci_em_priv *emp;
1040 state = simple_strtoul(buf, NULL, 0);
1042 /* get the slot number from the message */
1043 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1044 if (pmp < EM_MAX_SLOTS)
1045 emp = &pp->em_priv[pmp];
1049 /* mask off the activity bits if we are in sw_activity
1050 * mode, user should turn off sw_activity before setting
1051 * activity led through em_message
1053 if (emp->blink_policy)
1054 state &= ~EM_MSG_LED_VALUE_ACTIVITY;
1056 return ap->ops->transmit_led_message(ap, state, size);
1059 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
1061 struct ata_link *link = dev->link;
1062 struct ata_port *ap = link->ap;
1063 struct ahci_port_priv *pp = ap->private_data;
1064 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1065 u32 port_led_state = emp->led_state;
1067 /* save the desired Activity LED behavior */
1070 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
1072 /* set the LED to OFF */
1073 port_led_state &= EM_MSG_LED_VALUE_OFF;
1074 port_led_state |= (ap->port_no | (link->pmp << 8));
1075 ap->ops->transmit_led_message(ap, port_led_state, 4);
1077 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1078 if (val == BLINK_OFF) {
1079 /* set LED to ON for idle */
1080 port_led_state &= EM_MSG_LED_VALUE_OFF;
1081 port_led_state |= (ap->port_no | (link->pmp << 8));
1082 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */
1083 ap->ops->transmit_led_message(ap, port_led_state, 4);
1086 emp->blink_policy = val;
1090 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
1092 struct ata_link *link = dev->link;
1093 struct ata_port *ap = link->ap;
1094 struct ahci_port_priv *pp = ap->private_data;
1095 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1097 /* display the saved value of activity behavior for this
1100 return sprintf(buf, "%d\n", emp->blink_policy);
1103 static void ahci_port_init(struct device *dev, struct ata_port *ap,
1104 int port_no, void __iomem *mmio,
1105 void __iomem *port_mmio)
1107 const char *emsg = NULL;
1111 /* make sure port is not active */
1112 rc = ahci_deinit_port(ap, &emsg);
1114 dev_warn(dev, "%s (%d)\n", emsg, rc);
1117 tmp = readl(port_mmio + PORT_SCR_ERR);
1118 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1119 writel(tmp, port_mmio + PORT_SCR_ERR);
1121 /* clear port IRQ */
1122 tmp = readl(port_mmio + PORT_IRQ_STAT);
1123 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1125 writel(tmp, port_mmio + PORT_IRQ_STAT);
1127 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1130 void ahci_init_controller(struct ata_host *host)
1132 struct ahci_host_priv *hpriv = host->private_data;
1133 void __iomem *mmio = hpriv->mmio;
1135 void __iomem *port_mmio;
1138 for (i = 0; i < host->n_ports; i++) {
1139 struct ata_port *ap = host->ports[i];
1141 port_mmio = ahci_port_base(ap);
1142 if (ata_port_is_dummy(ap))
1145 ahci_port_init(host->dev, ap, i, mmio, port_mmio);
1148 tmp = readl(mmio + HOST_CTL);
1149 VPRINTK("HOST_CTL 0x%x\n", tmp);
1150 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1151 tmp = readl(mmio + HOST_CTL);
1152 VPRINTK("HOST_CTL 0x%x\n", tmp);
1154 EXPORT_SYMBOL_GPL(ahci_init_controller);
1156 static void ahci_dev_config(struct ata_device *dev)
1158 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1160 if (hpriv->flags & AHCI_HFLAG_SECT255) {
1161 dev->max_sectors = 255;
1163 "SB600 AHCI: limiting to 255 sectors per cmd\n");
1167 unsigned int ahci_dev_classify(struct ata_port *ap)
1169 void __iomem *port_mmio = ahci_port_base(ap);
1170 struct ata_taskfile tf;
1173 tmp = readl(port_mmio + PORT_SIG);
1174 tf.lbah = (tmp >> 24) & 0xff;
1175 tf.lbam = (tmp >> 16) & 0xff;
1176 tf.lbal = (tmp >> 8) & 0xff;
1177 tf.nsect = (tmp) & 0xff;
1179 return ata_dev_classify(&tf);
1181 EXPORT_SYMBOL_GPL(ahci_dev_classify);
1183 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1186 dma_addr_t cmd_tbl_dma;
1188 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1190 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1191 pp->cmd_slot[tag].status = 0;
1192 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1193 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1195 EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot);
1197 int ahci_kick_engine(struct ata_port *ap)
1199 void __iomem *port_mmio = ahci_port_base(ap);
1200 struct ahci_host_priv *hpriv = ap->host->private_data;
1201 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1206 rc = ahci_stop_engine(ap);
1211 * always do CLO if PMP is attached (AHCI-1.3 9.2)
1213 busy = status & (ATA_BUSY | ATA_DRQ);
1214 if (!busy && !sata_pmp_attached(ap)) {
1219 if (!(hpriv->cap & HOST_CAP_CLO)) {
1225 tmp = readl(port_mmio + PORT_CMD);
1226 tmp |= PORT_CMD_CLO;
1227 writel(tmp, port_mmio + PORT_CMD);
1230 tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
1231 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1232 if (tmp & PORT_CMD_CLO)
1235 /* restart engine */
1237 ahci_start_engine(ap);
1240 EXPORT_SYMBOL_GPL(ahci_kick_engine);
1242 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1243 struct ata_taskfile *tf, int is_cmd, u16 flags,
1244 unsigned long timeout_msec)
1246 const u32 cmd_fis_len = 5; /* five dwords */
1247 struct ahci_port_priv *pp = ap->private_data;
1248 void __iomem *port_mmio = ahci_port_base(ap);
1249 u8 *fis = pp->cmd_tbl;
1252 /* prep the command */
1253 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1254 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1257 writel(1, port_mmio + PORT_CMD_ISSUE);
1260 tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE,
1261 0x1, 0x1, 1, timeout_msec);
1263 ahci_kick_engine(ap);
1267 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1272 int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1273 int pmp, unsigned long deadline,
1274 int (*check_ready)(struct ata_link *link))
1276 struct ata_port *ap = link->ap;
1277 struct ahci_host_priv *hpriv = ap->host->private_data;
1278 const char *reason = NULL;
1279 unsigned long now, msecs;
1280 struct ata_taskfile tf;
1285 /* prepare for SRST (AHCI-1.1 10.4.1) */
1286 rc = ahci_kick_engine(ap);
1287 if (rc && rc != -EOPNOTSUPP)
1288 ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc);
1290 ata_tf_init(link->device, &tf);
1292 /* issue the first D2H Register FIS */
1295 if (time_after(deadline, now))
1296 msecs = jiffies_to_msecs(deadline - now);
1299 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1300 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1302 reason = "1st FIS failed";
1306 /* spec says at least 5us, but be generous and sleep for 1ms */
1309 /* issue the second D2H Register FIS */
1310 tf.ctl &= ~ATA_SRST;
1311 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1313 /* wait for link to become ready */
1314 rc = ata_wait_after_reset(link, deadline, check_ready);
1315 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) {
1317 * Workaround for cases where link online status can't
1318 * be trusted. Treat device readiness timeout as link
1321 ata_link_info(link, "device not ready, treating as offline\n");
1322 *class = ATA_DEV_NONE;
1324 /* link occupied, -ENODEV too is an error */
1325 reason = "device not ready";
1328 *class = ahci_dev_classify(ap);
1330 DPRINTK("EXIT, class=%u\n", *class);
1334 ata_link_err(link, "softreset failed (%s)\n", reason);
1338 int ahci_check_ready(struct ata_link *link)
1340 void __iomem *port_mmio = ahci_port_base(link->ap);
1341 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1343 return ata_check_ready(status);
1345 EXPORT_SYMBOL_GPL(ahci_check_ready);
1347 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1348 unsigned long deadline)
1350 int pmp = sata_srst_pmp(link);
1354 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
1356 EXPORT_SYMBOL_GPL(ahci_do_softreset);
1358 static int ahci_bad_pmp_check_ready(struct ata_link *link)
1360 void __iomem *port_mmio = ahci_port_base(link->ap);
1361 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1362 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT);
1365 * There is no need to check TFDATA if BAD PMP is found due to HW bug,
1366 * which can save timeout delay.
1368 if (irq_status & PORT_IRQ_BAD_PMP)
1371 return ata_check_ready(status);
1374 int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class,
1375 unsigned long deadline)
1377 struct ata_port *ap = link->ap;
1378 void __iomem *port_mmio = ahci_port_base(ap);
1379 int pmp = sata_srst_pmp(link);
1385 rc = ahci_do_softreset(link, class, pmp, deadline,
1386 ahci_bad_pmp_check_ready);
1389 * Soft reset fails with IPMS set when PMP is enabled but
1390 * SATA HDD/ODD is connected to SATA port, do soft reset
1394 irq_sts = readl(port_mmio + PORT_IRQ_STAT);
1395 if (irq_sts & PORT_IRQ_BAD_PMP) {
1397 "applying PMP SRST workaround "
1399 rc = ahci_do_softreset(link, class, 0, deadline,
1407 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1408 unsigned long deadline)
1410 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
1411 struct ata_port *ap = link->ap;
1412 struct ahci_port_priv *pp = ap->private_data;
1413 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1414 struct ata_taskfile tf;
1420 ahci_stop_engine(ap);
1422 /* clear D2H reception area to properly wait for D2H FIS */
1423 ata_tf_init(link->device, &tf);
1424 tf.command = ATA_BUSY;
1425 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1427 rc = sata_link_hardreset(link, timing, deadline, &online,
1430 ahci_start_engine(ap);
1433 *class = ahci_dev_classify(ap);
1435 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1439 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1441 struct ata_port *ap = link->ap;
1442 void __iomem *port_mmio = ahci_port_base(ap);
1445 ata_std_postreset(link, class);
1447 /* Make sure port's ATAPI bit is set appropriately */
1448 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1449 if (*class == ATA_DEV_ATAPI)
1450 new_tmp |= PORT_CMD_ATAPI;
1452 new_tmp &= ~PORT_CMD_ATAPI;
1453 if (new_tmp != tmp) {
1454 writel(new_tmp, port_mmio + PORT_CMD);
1455 readl(port_mmio + PORT_CMD); /* flush */
1459 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1461 struct scatterlist *sg;
1462 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1468 * Next, the S/G list.
1470 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1471 dma_addr_t addr = sg_dma_address(sg);
1472 u32 sg_len = sg_dma_len(sg);
1474 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
1475 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
1476 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
1482 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc)
1484 struct ata_port *ap = qc->ap;
1485 struct ahci_port_priv *pp = ap->private_data;
1487 if (!sata_pmp_attached(ap) || pp->fbs_enabled)
1488 return ata_std_qc_defer(qc);
1490 return sata_pmp_qc_defer_cmd_switch(qc);
1493 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1495 struct ata_port *ap = qc->ap;
1496 struct ahci_port_priv *pp = ap->private_data;
1497 int is_atapi = ata_is_atapi(qc->tf.protocol);
1500 const u32 cmd_fis_len = 5; /* five dwords */
1501 unsigned int n_elem;
1504 * Fill in command table information. First, the header,
1505 * a SATA Register - Host to Device command FIS.
1507 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1509 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1511 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1512 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1516 if (qc->flags & ATA_QCFLAG_DMAMAP)
1517 n_elem = ahci_fill_sg(qc, cmd_tbl);
1520 * Fill in command slot information.
1522 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1523 if (qc->tf.flags & ATA_TFLAG_WRITE)
1524 opts |= AHCI_CMD_WRITE;
1526 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1528 ahci_fill_cmd_slot(pp, qc->tag, opts);
1531 static void ahci_fbs_dec_intr(struct ata_port *ap)
1533 struct ahci_port_priv *pp = ap->private_data;
1534 void __iomem *port_mmio = ahci_port_base(ap);
1535 u32 fbs = readl(port_mmio + PORT_FBS);
1539 BUG_ON(!pp->fbs_enabled);
1541 /* time to wait for DEC is not specified by AHCI spec,
1542 * add a retry loop for safety.
1544 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS);
1545 fbs = readl(port_mmio + PORT_FBS);
1546 while ((fbs & PORT_FBS_DEC) && retries--) {
1548 fbs = readl(port_mmio + PORT_FBS);
1551 if (fbs & PORT_FBS_DEC)
1552 dev_err(ap->host->dev, "failed to clear device error\n");
1555 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1557 struct ahci_host_priv *hpriv = ap->host->private_data;
1558 struct ahci_port_priv *pp = ap->private_data;
1559 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1560 struct ata_link *link = NULL;
1561 struct ata_queued_cmd *active_qc;
1562 struct ata_eh_info *active_ehi;
1563 bool fbs_need_dec = false;
1566 /* determine active link with error */
1567 if (pp->fbs_enabled) {
1568 void __iomem *port_mmio = ahci_port_base(ap);
1569 u32 fbs = readl(port_mmio + PORT_FBS);
1570 int pmp = fbs >> PORT_FBS_DWE_OFFSET;
1572 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) {
1573 link = &ap->pmp_link[pmp];
1574 fbs_need_dec = true;
1578 ata_for_each_link(link, ap, EDGE)
1579 if (ata_link_active(link))
1585 active_qc = ata_qc_from_tag(ap, link->active_tag);
1586 active_ehi = &link->eh_info;
1588 /* record irq stat */
1589 ata_ehi_clear_desc(host_ehi);
1590 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1592 /* AHCI needs SError cleared; otherwise, it might lock up */
1593 ahci_scr_read(&ap->link, SCR_ERROR, &serror);
1594 ahci_scr_write(&ap->link, SCR_ERROR, serror);
1595 host_ehi->serror |= serror;
1597 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1598 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1599 irq_stat &= ~PORT_IRQ_IF_ERR;
1601 if (irq_stat & PORT_IRQ_TF_ERR) {
1602 /* If qc is active, charge it; otherwise, the active
1603 * link. There's no active qc on NCQ errors. It will
1604 * be determined by EH by reading log page 10h.
1607 active_qc->err_mask |= AC_ERR_DEV;
1609 active_ehi->err_mask |= AC_ERR_DEV;
1611 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1612 host_ehi->serror &= ~SERR_INTERNAL;
1615 if (irq_stat & PORT_IRQ_UNK_FIS) {
1616 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1618 active_ehi->err_mask |= AC_ERR_HSM;
1619 active_ehi->action |= ATA_EH_RESET;
1620 ata_ehi_push_desc(active_ehi,
1621 "unknown FIS %08x %08x %08x %08x" ,
1622 unk[0], unk[1], unk[2], unk[3]);
1625 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) {
1626 active_ehi->err_mask |= AC_ERR_HSM;
1627 active_ehi->action |= ATA_EH_RESET;
1628 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1631 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1632 host_ehi->err_mask |= AC_ERR_HOST_BUS;
1633 host_ehi->action |= ATA_EH_RESET;
1634 ata_ehi_push_desc(host_ehi, "host bus error");
1637 if (irq_stat & PORT_IRQ_IF_ERR) {
1639 active_ehi->err_mask |= AC_ERR_DEV;
1641 host_ehi->err_mask |= AC_ERR_ATA_BUS;
1642 host_ehi->action |= ATA_EH_RESET;
1645 ata_ehi_push_desc(host_ehi, "interface fatal error");
1648 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1649 ata_ehi_hotplugged(host_ehi);
1650 ata_ehi_push_desc(host_ehi, "%s",
1651 irq_stat & PORT_IRQ_CONNECT ?
1652 "connection status changed" : "PHY RDY changed");
1655 /* okay, let's hand over to EH */
1657 if (irq_stat & PORT_IRQ_FREEZE)
1658 ata_port_freeze(ap);
1659 else if (fbs_need_dec) {
1660 ata_link_abort(link);
1661 ahci_fbs_dec_intr(ap);
1666 static void ahci_handle_port_interrupt(struct ata_port *ap,
1667 void __iomem *port_mmio, u32 status)
1669 struct ata_eh_info *ehi = &ap->link.eh_info;
1670 struct ahci_port_priv *pp = ap->private_data;
1671 struct ahci_host_priv *hpriv = ap->host->private_data;
1672 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
1676 /* ignore BAD_PMP while resetting */
1677 if (unlikely(resetting))
1678 status &= ~PORT_IRQ_BAD_PMP;
1680 /* if LPM is enabled, PHYRDY doesn't mean anything */
1681 if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) {
1682 status &= ~PORT_IRQ_PHYRDY;
1683 ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
1686 if (unlikely(status & PORT_IRQ_ERROR)) {
1687 ahci_error_intr(ap, status);
1691 if (status & PORT_IRQ_SDB_FIS) {
1692 /* If SNotification is available, leave notification
1693 * handling to sata_async_notification(). If not,
1694 * emulate it by snooping SDB FIS RX area.
1696 * Snooping FIS RX area is probably cheaper than
1697 * poking SNotification but some constrollers which
1698 * implement SNotification, ICH9 for example, don't
1699 * store AN SDB FIS into receive area.
1701 if (hpriv->cap & HOST_CAP_SNTF)
1702 sata_async_notification(ap);
1704 /* If the 'N' bit in word 0 of the FIS is set,
1705 * we just received asynchronous notification.
1706 * Tell libata about it.
1708 * Lack of SNotification should not appear in
1709 * ahci 1.2, so the workaround is unnecessary
1710 * when FBS is enabled.
1712 if (pp->fbs_enabled)
1715 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1716 u32 f0 = le32_to_cpu(f[0]);
1718 sata_async_notification(ap);
1723 /* pp->active_link is not reliable once FBS is enabled, both
1724 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because
1725 * NCQ and non-NCQ commands may be in flight at the same time.
1727 if (pp->fbs_enabled) {
1728 if (ap->qc_active) {
1729 qc_active = readl(port_mmio + PORT_SCR_ACT);
1730 qc_active |= readl(port_mmio + PORT_CMD_ISSUE);
1733 /* pp->active_link is valid iff any command is in flight */
1734 if (ap->qc_active && pp->active_link->sactive)
1735 qc_active = readl(port_mmio + PORT_SCR_ACT);
1737 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1741 rc = ata_qc_complete_multiple(ap, qc_active);
1743 /* while resetting, invalid completions are expected */
1744 if (unlikely(rc < 0 && !resetting)) {
1745 ehi->err_mask |= AC_ERR_HSM;
1746 ehi->action |= ATA_EH_RESET;
1747 ata_port_freeze(ap);
1751 void ahci_port_intr(struct ata_port *ap)
1753 void __iomem *port_mmio = ahci_port_base(ap);
1756 status = readl(port_mmio + PORT_IRQ_STAT);
1757 writel(status, port_mmio + PORT_IRQ_STAT);
1759 ahci_handle_port_interrupt(ap, port_mmio, status);
1762 irqreturn_t ahci_thread_fn(int irq, void *dev_instance)
1764 struct ata_port *ap = dev_instance;
1765 struct ahci_port_priv *pp = ap->private_data;
1766 void __iomem *port_mmio = ahci_port_base(ap);
1767 unsigned long flags;
1770 spin_lock_irqsave(&ap->host->lock, flags);
1771 status = pp->intr_status;
1773 pp->intr_status = 0;
1774 spin_unlock_irqrestore(&ap->host->lock, flags);
1776 spin_lock_bh(ap->lock);
1777 ahci_handle_port_interrupt(ap, port_mmio, status);
1778 spin_unlock_bh(ap->lock);
1782 EXPORT_SYMBOL_GPL(ahci_thread_fn);
1784 void ahci_hw_port_interrupt(struct ata_port *ap)
1786 void __iomem *port_mmio = ahci_port_base(ap);
1787 struct ahci_port_priv *pp = ap->private_data;
1790 status = readl(port_mmio + PORT_IRQ_STAT);
1791 writel(status, port_mmio + PORT_IRQ_STAT);
1793 pp->intr_status |= status;
1796 irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance)
1798 struct ata_port *ap_this = dev_instance;
1799 struct ahci_port_priv *pp = ap_this->private_data;
1800 struct ata_host *host = ap_this->host;
1801 struct ahci_host_priv *hpriv = host->private_data;
1802 void __iomem *mmio = hpriv->mmio;
1804 u32 irq_stat, irq_masked;
1808 spin_lock(&host->lock);
1810 irq_stat = readl(mmio + HOST_IRQ_STAT);
1813 u32 status = pp->intr_status;
1815 spin_unlock(&host->lock);
1819 return status ? IRQ_WAKE_THREAD : IRQ_NONE;
1822 irq_masked = irq_stat & hpriv->port_map;
1824 for (i = 0; i < host->n_ports; i++) {
1825 struct ata_port *ap;
1827 if (!(irq_masked & (1 << i)))
1830 ap = host->ports[i];
1832 ahci_hw_port_interrupt(ap);
1833 VPRINTK("port %u\n", i);
1835 VPRINTK("port %u (no irq)\n", i);
1836 if (ata_ratelimit())
1838 "interrupt on disabled port %u\n", i);
1842 writel(irq_stat, mmio + HOST_IRQ_STAT);
1844 spin_unlock(&host->lock);
1848 return IRQ_WAKE_THREAD;
1850 EXPORT_SYMBOL_GPL(ahci_hw_interrupt);
1852 irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1854 struct ata_host *host = dev_instance;
1855 struct ahci_host_priv *hpriv;
1856 unsigned int i, handled = 0;
1858 u32 irq_stat, irq_masked;
1862 hpriv = host->private_data;
1865 /* sigh. 0xffffffff is a valid return from h/w */
1866 irq_stat = readl(mmio + HOST_IRQ_STAT);
1870 irq_masked = irq_stat & hpriv->port_map;
1872 spin_lock(&host->lock);
1874 for (i = 0; i < host->n_ports; i++) {
1875 struct ata_port *ap;
1877 if (!(irq_masked & (1 << i)))
1880 ap = host->ports[i];
1883 VPRINTK("port %u\n", i);
1885 VPRINTK("port %u (no irq)\n", i);
1886 if (ata_ratelimit())
1888 "interrupt on disabled port %u\n", i);
1894 /* HOST_IRQ_STAT behaves as level triggered latch meaning that
1895 * it should be cleared after all the port events are cleared;
1896 * otherwise, it will raise a spurious interrupt after each
1897 * valid one. Please read section 10.6.2 of ahci 1.1 for more
1900 * Also, use the unmasked value to clear interrupt as spurious
1901 * pending event on a dummy port might cause screaming IRQ.
1903 writel(irq_stat, mmio + HOST_IRQ_STAT);
1905 spin_unlock(&host->lock);
1909 return IRQ_RETVAL(handled);
1911 EXPORT_SYMBOL_GPL(ahci_interrupt);
1913 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1915 struct ata_port *ap = qc->ap;
1916 void __iomem *port_mmio = ahci_port_base(ap);
1917 struct ahci_port_priv *pp = ap->private_data;
1919 /* Keep track of the currently active link. It will be used
1920 * in completion path to determine whether NCQ phase is in
1923 pp->active_link = qc->dev->link;
1925 if (qc->tf.protocol == ATA_PROT_NCQ)
1926 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1928 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) {
1929 u32 fbs = readl(port_mmio + PORT_FBS);
1930 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
1931 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET;
1932 writel(fbs, port_mmio + PORT_FBS);
1933 pp->fbs_last_dev = qc->dev->link->pmp;
1936 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1938 ahci_sw_activity(qc->dev->link);
1943 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
1945 struct ahci_port_priv *pp = qc->ap->private_data;
1946 u8 *rx_fis = pp->rx_fis;
1948 if (pp->fbs_enabled)
1949 rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
1952 * After a successful execution of an ATA PIO data-in command,
1953 * the device doesn't send D2H Reg FIS to update the TF and
1954 * the host should take TF and E_Status from the preceding PIO
1957 if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE &&
1958 !(qc->flags & ATA_QCFLAG_FAILED)) {
1959 ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
1960 qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15];
1962 ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);
1967 static void ahci_freeze(struct ata_port *ap)
1969 void __iomem *port_mmio = ahci_port_base(ap);
1972 writel(0, port_mmio + PORT_IRQ_MASK);
1975 static void ahci_thaw(struct ata_port *ap)
1977 struct ahci_host_priv *hpriv = ap->host->private_data;
1978 void __iomem *mmio = hpriv->mmio;
1979 void __iomem *port_mmio = ahci_port_base(ap);
1981 struct ahci_port_priv *pp = ap->private_data;
1984 tmp = readl(port_mmio + PORT_IRQ_STAT);
1985 writel(tmp, port_mmio + PORT_IRQ_STAT);
1986 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1988 /* turn IRQ back on */
1989 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1992 static void ahci_error_handler(struct ata_port *ap)
1994 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1995 /* restart engine */
1996 ahci_stop_engine(ap);
1997 ahci_start_engine(ap);
2000 sata_pmp_error_handler(ap);
2002 if (!ata_dev_enabled(ap->link.device))
2003 ahci_stop_engine(ap);
2006 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
2008 struct ata_port *ap = qc->ap;
2010 /* make DMA engine forget about the failed command */
2011 if (qc->flags & ATA_QCFLAG_FAILED)
2012 ahci_kick_engine(ap);
2015 static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep)
2017 void __iomem *port_mmio = ahci_port_base(ap);
2018 struct ata_device *dev = ap->link.device;
2019 u32 devslp, dm, dito, mdat, deto;
2021 unsigned int err_mask;
2023 devslp = readl(port_mmio + PORT_DEVSLP);
2024 if (!(devslp & PORT_DEVSLP_DSP)) {
2025 dev_err(ap->host->dev, "port does not support device sleep\n");
2029 /* disable device sleep */
2031 if (devslp & PORT_DEVSLP_ADSE) {
2032 writel(devslp & ~PORT_DEVSLP_ADSE,
2033 port_mmio + PORT_DEVSLP);
2034 err_mask = ata_dev_set_feature(dev,
2035 SETFEATURES_SATA_DISABLE,
2037 if (err_mask && err_mask != AC_ERR_DEV)
2038 ata_dev_warn(dev, "failed to disable DEVSLP\n");
2043 /* device sleep was already enabled */
2044 if (devslp & PORT_DEVSLP_ADSE)
2047 /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */
2048 rc = ahci_stop_engine(ap);
2052 dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET;
2053 dito = devslp_idle_timeout / (dm + 1);
2057 /* Use the nominal value 10 ms if the read MDAT is zero,
2058 * the nominal value of DETO is 20 ms.
2060 if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] &
2061 ATA_LOG_DEVSLP_VALID_MASK) {
2062 mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] &
2063 ATA_LOG_DEVSLP_MDAT_MASK;
2066 deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO];
2074 devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) |
2075 (mdat << PORT_DEVSLP_MDAT_OFFSET) |
2076 (deto << PORT_DEVSLP_DETO_OFFSET) |
2078 writel(devslp, port_mmio + PORT_DEVSLP);
2080 ahci_start_engine(ap);
2082 /* enable device sleep feature for the drive */
2083 err_mask = ata_dev_set_feature(dev,
2084 SETFEATURES_SATA_ENABLE,
2086 if (err_mask && err_mask != AC_ERR_DEV)
2087 ata_dev_warn(dev, "failed to enable DEVSLP\n");
2090 static void ahci_enable_fbs(struct ata_port *ap)
2092 struct ahci_port_priv *pp = ap->private_data;
2093 void __iomem *port_mmio = ahci_port_base(ap);
2097 if (!pp->fbs_supported)
2100 fbs = readl(port_mmio + PORT_FBS);
2101 if (fbs & PORT_FBS_EN) {
2102 pp->fbs_enabled = true;
2103 pp->fbs_last_dev = -1; /* initialization */
2107 rc = ahci_stop_engine(ap);
2111 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS);
2112 fbs = readl(port_mmio + PORT_FBS);
2113 if (fbs & PORT_FBS_EN) {
2114 dev_info(ap->host->dev, "FBS is enabled\n");
2115 pp->fbs_enabled = true;
2116 pp->fbs_last_dev = -1; /* initialization */
2118 dev_err(ap->host->dev, "Failed to enable FBS\n");
2120 ahci_start_engine(ap);
2123 static void ahci_disable_fbs(struct ata_port *ap)
2125 struct ahci_port_priv *pp = ap->private_data;
2126 void __iomem *port_mmio = ahci_port_base(ap);
2130 if (!pp->fbs_supported)
2133 fbs = readl(port_mmio + PORT_FBS);
2134 if ((fbs & PORT_FBS_EN) == 0) {
2135 pp->fbs_enabled = false;
2139 rc = ahci_stop_engine(ap);
2143 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS);
2144 fbs = readl(port_mmio + PORT_FBS);
2145 if (fbs & PORT_FBS_EN)
2146 dev_err(ap->host->dev, "Failed to disable FBS\n");
2148 dev_info(ap->host->dev, "FBS is disabled\n");
2149 pp->fbs_enabled = false;
2152 ahci_start_engine(ap);
2155 static void ahci_pmp_attach(struct ata_port *ap)
2157 void __iomem *port_mmio = ahci_port_base(ap);
2158 struct ahci_port_priv *pp = ap->private_data;
2161 cmd = readl(port_mmio + PORT_CMD);
2162 cmd |= PORT_CMD_PMP;
2163 writel(cmd, port_mmio + PORT_CMD);
2165 ahci_enable_fbs(ap);
2167 pp->intr_mask |= PORT_IRQ_BAD_PMP;
2170 * We must not change the port interrupt mask register if the
2171 * port is marked frozen, the value in pp->intr_mask will be
2172 * restored later when the port is thawed.
2174 * Note that during initialization, the port is marked as
2175 * frozen since the irq handler is not yet registered.
2177 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2178 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2181 static void ahci_pmp_detach(struct ata_port *ap)
2183 void __iomem *port_mmio = ahci_port_base(ap);
2184 struct ahci_port_priv *pp = ap->private_data;
2187 ahci_disable_fbs(ap);
2189 cmd = readl(port_mmio + PORT_CMD);
2190 cmd &= ~PORT_CMD_PMP;
2191 writel(cmd, port_mmio + PORT_CMD);
2193 pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
2195 /* see comment above in ahci_pmp_attach() */
2196 if (!(ap->pflags & ATA_PFLAG_FROZEN))
2197 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2200 int ahci_port_resume(struct ata_port *ap)
2203 ahci_start_port(ap);
2205 if (sata_pmp_attached(ap))
2206 ahci_pmp_attach(ap);
2208 ahci_pmp_detach(ap);
2212 EXPORT_SYMBOL_GPL(ahci_port_resume);
2215 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
2217 const char *emsg = NULL;
2220 rc = ahci_deinit_port(ap, &emsg);
2222 ahci_power_down(ap);
2224 ata_port_err(ap, "%s (%d)\n", emsg, rc);
2225 ata_port_freeze(ap);
2232 static int ahci_port_start(struct ata_port *ap)
2234 struct ahci_host_priv *hpriv = ap->host->private_data;
2235 struct device *dev = ap->host->dev;
2236 struct ahci_port_priv *pp;
2239 size_t dma_sz, rx_fis_sz;
2241 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
2245 if (ap->host->n_ports > 1) {
2246 pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL);
2247 if (!pp->irq_desc) {
2248 devm_kfree(dev, pp);
2251 snprintf(pp->irq_desc, 8,
2252 "%s%d", dev_driver_string(dev), ap->port_no);
2255 /* check FBS capability */
2256 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) {
2257 void __iomem *port_mmio = ahci_port_base(ap);
2258 u32 cmd = readl(port_mmio + PORT_CMD);
2259 if (cmd & PORT_CMD_FBSCP)
2260 pp->fbs_supported = true;
2261 else if (hpriv->flags & AHCI_HFLAG_YES_FBS) {
2262 dev_info(dev, "port %d can do FBS, forcing FBSCP\n",
2264 pp->fbs_supported = true;
2266 dev_warn(dev, "port %d is not capable of FBS\n",
2270 if (pp->fbs_supported) {
2271 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ;
2272 rx_fis_sz = AHCI_RX_FIS_SZ * 16;
2274 dma_sz = AHCI_PORT_PRIV_DMA_SZ;
2275 rx_fis_sz = AHCI_RX_FIS_SZ;
2278 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL);
2281 memset(mem, 0, dma_sz);
2284 * First item in chunk of DMA memory: 32-slot command table,
2285 * 32 bytes each in size
2288 pp->cmd_slot_dma = mem_dma;
2290 mem += AHCI_CMD_SLOT_SZ;
2291 mem_dma += AHCI_CMD_SLOT_SZ;
2294 * Second item: Received-FIS area
2297 pp->rx_fis_dma = mem_dma;
2300 mem_dma += rx_fis_sz;
2303 * Third item: data area for storing a single command
2304 * and its scatter-gather table
2307 pp->cmd_tbl_dma = mem_dma;
2310 * Save off initial list of interrupts to be enabled.
2311 * This could be changed later
2313 pp->intr_mask = DEF_PORT_IRQ;
2316 * Switch to per-port locking in case each port has its own MSI vector.
2318 if ((hpriv->flags & AHCI_HFLAG_MULTI_MSI)) {
2319 spin_lock_init(&pp->lock);
2320 ap->lock = &pp->lock;
2323 ap->private_data = pp;
2325 /* engage engines, captain */
2326 return ahci_port_resume(ap);
2329 static void ahci_port_stop(struct ata_port *ap)
2331 const char *emsg = NULL;
2334 /* de-initialize port */
2335 rc = ahci_deinit_port(ap, &emsg);
2337 ata_port_warn(ap, "%s (%d)\n", emsg, rc);
2340 void ahci_print_info(struct ata_host *host, const char *scc_s)
2342 struct ahci_host_priv *hpriv = host->private_data;
2343 void __iomem *mmio = hpriv->mmio;
2344 u32 vers, cap, cap2, impl, speed;
2345 const char *speed_s;
2347 vers = readl(mmio + HOST_VERSION);
2350 impl = hpriv->port_map;
2352 speed = (cap >> 20) & 0xf;
2355 else if (speed == 2)
2357 else if (speed == 3)
2363 "AHCI %02x%02x.%02x%02x "
2364 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2367 (vers >> 24) & 0xff,
2368 (vers >> 16) & 0xff,
2372 ((cap >> 8) & 0x1f) + 1,
2386 cap & HOST_CAP_64 ? "64bit " : "",
2387 cap & HOST_CAP_NCQ ? "ncq " : "",
2388 cap & HOST_CAP_SNTF ? "sntf " : "",
2389 cap & HOST_CAP_MPS ? "ilck " : "",
2390 cap & HOST_CAP_SSS ? "stag " : "",
2391 cap & HOST_CAP_ALPM ? "pm " : "",
2392 cap & HOST_CAP_LED ? "led " : "",
2393 cap & HOST_CAP_CLO ? "clo " : "",
2394 cap & HOST_CAP_ONLY ? "only " : "",
2395 cap & HOST_CAP_PMP ? "pmp " : "",
2396 cap & HOST_CAP_FBS ? "fbs " : "",
2397 cap & HOST_CAP_PIO_MULTI ? "pio " : "",
2398 cap & HOST_CAP_SSC ? "slum " : "",
2399 cap & HOST_CAP_PART ? "part " : "",
2400 cap & HOST_CAP_CCC ? "ccc " : "",
2401 cap & HOST_CAP_EMS ? "ems " : "",
2402 cap & HOST_CAP_SXS ? "sxs " : "",
2403 cap2 & HOST_CAP2_DESO ? "deso " : "",
2404 cap2 & HOST_CAP2_SADM ? "sadm " : "",
2405 cap2 & HOST_CAP2_SDS ? "sds " : "",
2406 cap2 & HOST_CAP2_APST ? "apst " : "",
2407 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "",
2408 cap2 & HOST_CAP2_BOH ? "boh " : ""
2411 EXPORT_SYMBOL_GPL(ahci_print_info);
2413 void ahci_set_em_messages(struct ahci_host_priv *hpriv,
2414 struct ata_port_info *pi)
2417 void __iomem *mmio = hpriv->mmio;
2418 u32 em_loc = readl(mmio + HOST_EM_LOC);
2419 u32 em_ctl = readl(mmio + HOST_EM_CTL);
2421 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS))
2424 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16;
2428 hpriv->em_loc = ((em_loc >> 16) * 4);
2429 hpriv->em_buf_sz = ((em_loc & 0xff) * 4);
2430 hpriv->em_msg_type = messages;
2431 pi->flags |= ATA_FLAG_EM;
2432 if (!(em_ctl & EM_CTL_ALHD))
2433 pi->flags |= ATA_FLAG_SW_ACTIVITY;
2436 EXPORT_SYMBOL_GPL(ahci_set_em_messages);
2438 MODULE_AUTHOR("Jeff Garzik");
2439 MODULE_DESCRIPTION("Common AHCI SATA low-level routines");
2440 MODULE_LICENSE("GPL");