2 * libahci.c - Common AHCI SATA low-level routines
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
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>
49 static int ahci_skip_host_reset;
51 EXPORT_SYMBOL_GPL(ahci_ignore_sss);
53 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444);
54 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)");
56 module_param_named(ignore_sss, ahci_ignore_sss, int, 0444);
57 MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)");
59 static int ahci_enable_alpm(struct ata_port *ap,
61 static void ahci_disable_alpm(struct ata_port *ap);
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_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_hardreset(struct ata_link *link, unsigned int *class,
87 unsigned long deadline);
88 static void ahci_postreset(struct ata_link *link, unsigned int *class);
89 static void ahci_error_handler(struct ata_port *ap);
90 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
91 static int ahci_port_resume(struct ata_port *ap);
92 static void ahci_dev_config(struct ata_device *dev);
93 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
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);
112 static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL);
113 static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL);
114 static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL);
115 static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL);
117 static struct device_attribute *ahci_shost_attrs[] = {
118 &dev_attr_link_power_management_policy,
119 &dev_attr_em_message_type,
120 &dev_attr_em_message,
121 &dev_attr_ahci_host_caps,
122 &dev_attr_ahci_host_cap2,
123 &dev_attr_ahci_host_version,
124 &dev_attr_ahci_port_cmd,
128 static struct device_attribute *ahci_sdev_attrs[] = {
129 &dev_attr_sw_activity,
130 &dev_attr_unload_heads,
134 struct scsi_host_template ahci_sht = {
136 .can_queue = AHCI_MAX_CMDS - 1,
137 .sg_tablesize = AHCI_MAX_SG,
138 .dma_boundary = AHCI_DMA_BOUNDARY,
139 .shost_attrs = ahci_shost_attrs,
140 .sdev_attrs = ahci_sdev_attrs,
142 EXPORT_SYMBOL_GPL(ahci_sht);
144 struct ata_port_operations ahci_ops = {
145 .inherits = &sata_pmp_port_ops,
147 .qc_defer = ahci_pmp_qc_defer,
148 .qc_prep = ahci_qc_prep,
149 .qc_issue = ahci_qc_issue,
150 .qc_fill_rtf = ahci_qc_fill_rtf,
152 .freeze = ahci_freeze,
154 .softreset = ahci_softreset,
155 .hardreset = ahci_hardreset,
156 .postreset = ahci_postreset,
157 .pmp_softreset = ahci_softreset,
158 .error_handler = ahci_error_handler,
159 .post_internal_cmd = ahci_post_internal_cmd,
160 .dev_config = ahci_dev_config,
162 .scr_read = ahci_scr_read,
163 .scr_write = ahci_scr_write,
164 .pmp_attach = ahci_pmp_attach,
165 .pmp_detach = ahci_pmp_detach,
167 .enable_pm = ahci_enable_alpm,
168 .disable_pm = ahci_disable_alpm,
169 .em_show = ahci_led_show,
170 .em_store = ahci_led_store,
171 .sw_activity_show = ahci_activity_show,
172 .sw_activity_store = ahci_activity_store,
174 .port_suspend = ahci_port_suspend,
175 .port_resume = ahci_port_resume,
177 .port_start = ahci_port_start,
178 .port_stop = ahci_port_stop,
180 EXPORT_SYMBOL_GPL(ahci_ops);
182 int ahci_em_messages = 1;
183 EXPORT_SYMBOL_GPL(ahci_em_messages);
184 module_param(ahci_em_messages, int, 0444);
185 /* add other LED protocol types when they become supported */
186 MODULE_PARM_DESC(ahci_em_messages,
187 "Set AHCI Enclosure Management Message type (0 = disabled, 1 = LED");
189 static void ahci_enable_ahci(void __iomem *mmio)
194 /* turn on AHCI_EN */
195 tmp = readl(mmio + HOST_CTL);
196 if (tmp & HOST_AHCI_EN)
199 /* Some controllers need AHCI_EN to be written multiple times.
200 * Try a few times before giving up.
202 for (i = 0; i < 5; i++) {
204 writel(tmp, mmio + HOST_CTL);
205 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */
206 if (tmp & HOST_AHCI_EN)
214 static ssize_t ahci_show_host_caps(struct device *dev,
215 struct device_attribute *attr, char *buf)
217 struct Scsi_Host *shost = class_to_shost(dev);
218 struct ata_port *ap = ata_shost_to_port(shost);
219 struct ahci_host_priv *hpriv = ap->host->private_data;
221 return sprintf(buf, "%x\n", hpriv->cap);
224 static ssize_t ahci_show_host_cap2(struct device *dev,
225 struct device_attribute *attr, char *buf)
227 struct Scsi_Host *shost = class_to_shost(dev);
228 struct ata_port *ap = ata_shost_to_port(shost);
229 struct ahci_host_priv *hpriv = ap->host->private_data;
231 return sprintf(buf, "%x\n", hpriv->cap2);
234 static ssize_t ahci_show_host_version(struct device *dev,
235 struct device_attribute *attr, char *buf)
237 struct Scsi_Host *shost = class_to_shost(dev);
238 struct ata_port *ap = ata_shost_to_port(shost);
239 struct ahci_host_priv *hpriv = ap->host->private_data;
240 void __iomem *mmio = hpriv->mmio;
242 return sprintf(buf, "%x\n", readl(mmio + HOST_VERSION));
245 static ssize_t ahci_show_port_cmd(struct device *dev,
246 struct device_attribute *attr, char *buf)
248 struct Scsi_Host *shost = class_to_shost(dev);
249 struct ata_port *ap = ata_shost_to_port(shost);
250 void __iomem *port_mmio = ahci_port_base(ap);
252 return sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD));
256 * ahci_save_initial_config - Save and fixup initial config values
257 * @dev: target AHCI device
258 * @hpriv: host private area to store config values
259 * @force_port_map: force port map to a specified value
260 * @mask_port_map: mask out particular bits from port map
262 * Some registers containing configuration info might be setup by
263 * BIOS and might be cleared on reset. This function saves the
264 * initial values of those registers into @hpriv such that they
265 * can be restored after controller reset.
267 * If inconsistent, config values are fixed up by this function.
272 void ahci_save_initial_config(struct device *dev,
273 struct ahci_host_priv *hpriv,
274 unsigned int force_port_map,
275 unsigned int mask_port_map)
277 void __iomem *mmio = hpriv->mmio;
278 u32 cap, cap2, vers, port_map;
281 /* make sure AHCI mode is enabled before accessing CAP */
282 ahci_enable_ahci(mmio);
284 /* Values prefixed with saved_ are written back to host after
285 * reset. Values without are used for driver operation.
287 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
288 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
290 /* CAP2 register is only defined for AHCI 1.2 and later */
291 vers = readl(mmio + HOST_VERSION);
292 if ((vers >> 16) > 1 ||
293 ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200))
294 hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2);
296 hpriv->saved_cap2 = cap2 = 0;
298 /* some chips have errata preventing 64bit use */
299 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
300 dev_printk(KERN_INFO, dev,
301 "controller can't do 64bit DMA, forcing 32bit\n");
305 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
306 dev_printk(KERN_INFO, dev,
307 "controller can't do NCQ, turning off CAP_NCQ\n");
308 cap &= ~HOST_CAP_NCQ;
311 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) {
312 dev_printk(KERN_INFO, dev,
313 "controller can do NCQ, turning on CAP_NCQ\n");
317 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
318 dev_printk(KERN_INFO, dev,
319 "controller can't do PMP, turning off CAP_PMP\n");
320 cap &= ~HOST_CAP_PMP;
323 if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) {
324 dev_printk(KERN_INFO, dev,
325 "controller can't do SNTF, turning off CAP_SNTF\n");
326 cap &= ~HOST_CAP_SNTF;
329 if (force_port_map && port_map != force_port_map) {
330 dev_printk(KERN_INFO, dev, "forcing port_map 0x%x -> 0x%x\n",
331 port_map, force_port_map);
332 port_map = force_port_map;
336 dev_printk(KERN_ERR, dev, "masking port_map 0x%x -> 0x%x\n",
338 port_map & mask_port_map);
339 port_map &= mask_port_map;
342 /* cross check port_map and cap.n_ports */
346 for (i = 0; i < AHCI_MAX_PORTS; i++)
347 if (port_map & (1 << i))
350 /* If PI has more ports than n_ports, whine, clear
351 * port_map and let it be generated from n_ports.
353 if (map_ports > ahci_nr_ports(cap)) {
354 dev_printk(KERN_WARNING, dev,
355 "implemented port map (0x%x) contains more "
356 "ports than nr_ports (%u), using nr_ports\n",
357 port_map, ahci_nr_ports(cap));
362 /* fabricate port_map from cap.nr_ports */
364 port_map = (1 << ahci_nr_ports(cap)) - 1;
365 dev_printk(KERN_WARNING, dev,
366 "forcing PORTS_IMPL to 0x%x\n", port_map);
368 /* write the fixed up value to the PI register */
369 hpriv->saved_port_map = port_map;
372 /* record values to use during operation */
375 hpriv->port_map = port_map;
377 EXPORT_SYMBOL_GPL(ahci_save_initial_config);
380 * ahci_restore_initial_config - Restore initial config
381 * @host: target ATA host
383 * Restore initial config stored by ahci_save_initial_config().
388 static void ahci_restore_initial_config(struct ata_host *host)
390 struct ahci_host_priv *hpriv = host->private_data;
391 void __iomem *mmio = hpriv->mmio;
393 writel(hpriv->saved_cap, mmio + HOST_CAP);
394 if (hpriv->saved_cap2)
395 writel(hpriv->saved_cap2, mmio + HOST_CAP2);
396 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
397 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
400 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
402 static const int offset[] = {
403 [SCR_STATUS] = PORT_SCR_STAT,
404 [SCR_CONTROL] = PORT_SCR_CTL,
405 [SCR_ERROR] = PORT_SCR_ERR,
406 [SCR_ACTIVE] = PORT_SCR_ACT,
407 [SCR_NOTIFICATION] = PORT_SCR_NTF,
409 struct ahci_host_priv *hpriv = ap->host->private_data;
411 if (sc_reg < ARRAY_SIZE(offset) &&
412 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
413 return offset[sc_reg];
417 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
419 void __iomem *port_mmio = ahci_port_base(link->ap);
420 int offset = ahci_scr_offset(link->ap, sc_reg);
423 *val = readl(port_mmio + offset);
429 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
431 void __iomem *port_mmio = ahci_port_base(link->ap);
432 int offset = ahci_scr_offset(link->ap, sc_reg);
435 writel(val, port_mmio + offset);
441 static int ahci_is_device_present(void __iomem *port_mmio)
443 u8 status = readl(port_mmio + PORT_TFDATA) & 0xff;
445 /* Make sure PxTFD.STS.BSY and PxTFD.STS.DRQ are 0 */
446 if (status & (ATA_BUSY | ATA_DRQ))
449 /* Make sure PxSSTS.DET is 3h */
450 status = readl(port_mmio + PORT_SCR_STAT) & 0xf;
456 void ahci_start_engine(struct ata_port *ap)
458 void __iomem *port_mmio = ahci_port_base(ap);
461 if (!ahci_is_device_present(port_mmio))
465 tmp = readl(port_mmio + PORT_CMD);
466 tmp |= PORT_CMD_START;
467 writel(tmp, port_mmio + PORT_CMD);
468 readl(port_mmio + PORT_CMD); /* flush */
470 EXPORT_SYMBOL_GPL(ahci_start_engine);
472 int ahci_stop_engine(struct ata_port *ap)
474 void __iomem *port_mmio = ahci_port_base(ap);
477 tmp = readl(port_mmio + PORT_CMD);
479 /* check if the HBA is idle */
480 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
483 /* setting HBA to idle */
484 tmp &= ~PORT_CMD_START;
485 writel(tmp, port_mmio + PORT_CMD);
487 /* wait for engine to stop. This could be as long as 500 msec */
488 tmp = ata_wait_register(port_mmio + PORT_CMD,
489 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
490 if (tmp & PORT_CMD_LIST_ON)
495 EXPORT_SYMBOL_GPL(ahci_stop_engine);
497 static void ahci_start_fis_rx(struct ata_port *ap)
499 void __iomem *port_mmio = ahci_port_base(ap);
500 struct ahci_host_priv *hpriv = ap->host->private_data;
501 struct ahci_port_priv *pp = ap->private_data;
504 /* set FIS registers */
505 if (hpriv->cap & HOST_CAP_64)
506 writel((pp->cmd_slot_dma >> 16) >> 16,
507 port_mmio + PORT_LST_ADDR_HI);
508 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
510 if (hpriv->cap & HOST_CAP_64)
511 writel((pp->rx_fis_dma >> 16) >> 16,
512 port_mmio + PORT_FIS_ADDR_HI);
513 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
515 /* enable FIS reception */
516 tmp = readl(port_mmio + PORT_CMD);
517 tmp |= PORT_CMD_FIS_RX;
518 writel(tmp, port_mmio + PORT_CMD);
521 readl(port_mmio + PORT_CMD);
524 static int ahci_stop_fis_rx(struct ata_port *ap)
526 void __iomem *port_mmio = ahci_port_base(ap);
529 /* disable FIS reception */
530 tmp = readl(port_mmio + PORT_CMD);
531 tmp &= ~PORT_CMD_FIS_RX;
532 writel(tmp, port_mmio + PORT_CMD);
534 /* wait for completion, spec says 500ms, give it 1000 */
535 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
536 PORT_CMD_FIS_ON, 10, 1000);
537 if (tmp & PORT_CMD_FIS_ON)
543 static void ahci_power_up(struct ata_port *ap)
545 struct ahci_host_priv *hpriv = ap->host->private_data;
546 void __iomem *port_mmio = ahci_port_base(ap);
549 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
552 if (hpriv->cap & HOST_CAP_SSS) {
553 cmd |= PORT_CMD_SPIN_UP;
554 writel(cmd, port_mmio + PORT_CMD);
558 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
561 static void ahci_disable_alpm(struct ata_port *ap)
563 struct ahci_host_priv *hpriv = ap->host->private_data;
564 void __iomem *port_mmio = ahci_port_base(ap);
566 struct ahci_port_priv *pp = ap->private_data;
568 /* IPM bits should be disabled by libata-core */
569 /* get the existing command bits */
570 cmd = readl(port_mmio + PORT_CMD);
572 /* disable ALPM and ASP */
573 cmd &= ~PORT_CMD_ASP;
574 cmd &= ~PORT_CMD_ALPE;
576 /* force the interface back to active */
577 cmd |= PORT_CMD_ICC_ACTIVE;
579 /* write out new cmd value */
580 writel(cmd, port_mmio + PORT_CMD);
581 cmd = readl(port_mmio + PORT_CMD);
583 /* wait 10ms to be sure we've come out of any low power state */
586 /* clear out any PhyRdy stuff from interrupt status */
587 writel(PORT_IRQ_PHYRDY, port_mmio + PORT_IRQ_STAT);
589 /* go ahead and clean out PhyRdy Change from Serror too */
590 ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18)));
593 * Clear flag to indicate that we should ignore all PhyRdy
596 hpriv->flags &= ~AHCI_HFLAG_NO_HOTPLUG;
599 * Enable interrupts on Phy Ready.
601 pp->intr_mask |= PORT_IRQ_PHYRDY;
602 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
605 * don't change the link pm policy - we can be called
606 * just to turn of link pm temporarily
610 static int ahci_enable_alpm(struct ata_port *ap,
613 struct ahci_host_priv *hpriv = ap->host->private_data;
614 void __iomem *port_mmio = ahci_port_base(ap);
616 struct ahci_port_priv *pp = ap->private_data;
619 /* Make sure the host is capable of link power management */
620 if (!(hpriv->cap & HOST_CAP_ALPM))
624 case MAX_PERFORMANCE:
627 * if we came here with NOT_AVAILABLE,
628 * it just means this is the first time we
629 * have tried to enable - default to max performance,
630 * and let the user go to lower power modes on request.
632 ahci_disable_alpm(ap);
635 /* configure HBA to enter SLUMBER */
639 /* configure HBA to enter PARTIAL */
647 * Disable interrupts on Phy Ready. This keeps us from
648 * getting woken up due to spurious phy ready interrupts
649 * TBD - Hot plug should be done via polling now, is
650 * that even supported?
652 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
653 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
656 * Set a flag to indicate that we should ignore all PhyRdy
657 * state changes since these can happen now whenever we
660 hpriv->flags |= AHCI_HFLAG_NO_HOTPLUG;
662 /* get the existing command bits */
663 cmd = readl(port_mmio + PORT_CMD);
666 * Set ASP based on Policy
671 * Setting this bit will instruct the HBA to aggressively
672 * enter a lower power link state when it's appropriate and
673 * based on the value set above for ASP
675 cmd |= PORT_CMD_ALPE;
677 /* write out new cmd value */
678 writel(cmd, port_mmio + PORT_CMD);
679 cmd = readl(port_mmio + PORT_CMD);
681 /* IPM bits should be set by libata-core */
686 static void ahci_power_down(struct ata_port *ap)
688 struct ahci_host_priv *hpriv = ap->host->private_data;
689 void __iomem *port_mmio = ahci_port_base(ap);
692 if (!(hpriv->cap & HOST_CAP_SSS))
695 /* put device into listen mode, first set PxSCTL.DET to 0 */
696 scontrol = readl(port_mmio + PORT_SCR_CTL);
698 writel(scontrol, port_mmio + PORT_SCR_CTL);
700 /* then set PxCMD.SUD to 0 */
701 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
702 cmd &= ~PORT_CMD_SPIN_UP;
703 writel(cmd, port_mmio + PORT_CMD);
707 static void ahci_start_port(struct ata_port *ap)
709 struct ahci_port_priv *pp = ap->private_data;
710 struct ata_link *link;
711 struct ahci_em_priv *emp;
715 /* enable FIS reception */
716 ahci_start_fis_rx(ap);
719 ahci_start_engine(ap);
722 if (ap->flags & ATA_FLAG_EM) {
723 ata_for_each_link(link, ap, EDGE) {
724 emp = &pp->em_priv[link->pmp];
726 /* EM Transmit bit maybe busy during init */
727 for (i = 0; i < EM_MAX_RETRY; i++) {
728 rc = ahci_transmit_led_message(ap,
739 if (ap->flags & ATA_FLAG_SW_ACTIVITY)
740 ata_for_each_link(link, ap, EDGE)
741 ahci_init_sw_activity(link);
745 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
750 rc = ahci_stop_engine(ap);
752 *emsg = "failed to stop engine";
756 /* disable FIS reception */
757 rc = ahci_stop_fis_rx(ap);
759 *emsg = "failed stop FIS RX";
766 int ahci_reset_controller(struct ata_host *host)
768 struct ahci_host_priv *hpriv = host->private_data;
769 void __iomem *mmio = hpriv->mmio;
772 /* we must be in AHCI mode, before using anything
773 * AHCI-specific, such as HOST_RESET.
775 ahci_enable_ahci(mmio);
777 /* global controller reset */
778 if (!ahci_skip_host_reset) {
779 tmp = readl(mmio + HOST_CTL);
780 if ((tmp & HOST_RESET) == 0) {
781 writel(tmp | HOST_RESET, mmio + HOST_CTL);
782 readl(mmio + HOST_CTL); /* flush */
786 * to perform host reset, OS should set HOST_RESET
787 * and poll until this bit is read to be "0".
788 * reset must complete within 1 second, or
789 * the hardware should be considered fried.
791 tmp = ata_wait_register(mmio + HOST_CTL, HOST_RESET,
792 HOST_RESET, 10, 1000);
794 if (tmp & HOST_RESET) {
795 dev_printk(KERN_ERR, host->dev,
796 "controller reset failed (0x%x)\n", tmp);
800 /* turn on AHCI mode */
801 ahci_enable_ahci(mmio);
803 /* Some registers might be cleared on reset. Restore
806 ahci_restore_initial_config(host);
808 dev_printk(KERN_INFO, host->dev,
809 "skipping global host reset\n");
813 EXPORT_SYMBOL_GPL(ahci_reset_controller);
815 static void ahci_sw_activity(struct ata_link *link)
817 struct ata_port *ap = link->ap;
818 struct ahci_port_priv *pp = ap->private_data;
819 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
821 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
825 if (!timer_pending(&emp->timer))
826 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
829 static void ahci_sw_activity_blink(unsigned long arg)
831 struct ata_link *link = (struct ata_link *)arg;
832 struct ata_port *ap = link->ap;
833 struct ahci_port_priv *pp = ap->private_data;
834 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
835 unsigned long led_message = emp->led_state;
836 u32 activity_led_state;
839 led_message &= EM_MSG_LED_VALUE;
840 led_message |= ap->port_no | (link->pmp << 8);
842 /* check to see if we've had activity. If so,
843 * toggle state of LED and reset timer. If not,
844 * turn LED to desired idle state.
846 spin_lock_irqsave(ap->lock, flags);
847 if (emp->saved_activity != emp->activity) {
848 emp->saved_activity = emp->activity;
849 /* get the current LED state */
850 activity_led_state = led_message & EM_MSG_LED_VALUE_ON;
852 if (activity_led_state)
853 activity_led_state = 0;
855 activity_led_state = 1;
857 /* clear old state */
858 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
861 led_message |= (activity_led_state << 16);
862 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
865 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
866 if (emp->blink_policy == BLINK_OFF)
867 led_message |= (1 << 16);
869 spin_unlock_irqrestore(ap->lock, flags);
870 ahci_transmit_led_message(ap, led_message, 4);
873 static void ahci_init_sw_activity(struct ata_link *link)
875 struct ata_port *ap = link->ap;
876 struct ahci_port_priv *pp = ap->private_data;
877 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
879 /* init activity stats, setup timer */
880 emp->saved_activity = emp->activity = 0;
881 setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link);
883 /* check our blink policy and set flag for link if it's enabled */
884 if (emp->blink_policy)
885 link->flags |= ATA_LFLAG_SW_ACTIVITY;
888 int ahci_reset_em(struct ata_host *host)
890 struct ahci_host_priv *hpriv = host->private_data;
891 void __iomem *mmio = hpriv->mmio;
894 em_ctl = readl(mmio + HOST_EM_CTL);
895 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
898 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
901 EXPORT_SYMBOL_GPL(ahci_reset_em);
903 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
906 struct ahci_host_priv *hpriv = ap->host->private_data;
907 struct ahci_port_priv *pp = ap->private_data;
908 void __iomem *mmio = hpriv->mmio;
910 u32 message[] = {0, 0};
913 struct ahci_em_priv *emp;
915 /* get the slot number from the message */
916 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
917 if (pmp < EM_MAX_SLOTS)
918 emp = &pp->em_priv[pmp];
922 spin_lock_irqsave(ap->lock, flags);
925 * if we are still busy transmitting a previous message,
928 em_ctl = readl(mmio + HOST_EM_CTL);
929 if (em_ctl & EM_CTL_TM) {
930 spin_unlock_irqrestore(ap->lock, flags);
935 * create message header - this is all zero except for
936 * the message size, which is 4 bytes.
938 message[0] |= (4 << 8);
940 /* ignore 0:4 of byte zero, fill in port info yourself */
941 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no);
943 /* write message to EM_LOC */
944 writel(message[0], mmio + hpriv->em_loc);
945 writel(message[1], mmio + hpriv->em_loc+4);
947 /* save off new led state for port/slot */
948 emp->led_state = state;
951 * tell hardware to transmit the message
953 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
955 spin_unlock_irqrestore(ap->lock, flags);
959 static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
961 struct ahci_port_priv *pp = ap->private_data;
962 struct ata_link *link;
963 struct ahci_em_priv *emp;
966 ata_for_each_link(link, ap, EDGE) {
967 emp = &pp->em_priv[link->pmp];
968 rc += sprintf(buf, "%lx\n", emp->led_state);
973 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
978 struct ahci_port_priv *pp = ap->private_data;
979 struct ahci_em_priv *emp;
981 state = simple_strtoul(buf, NULL, 0);
983 /* get the slot number from the message */
984 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
985 if (pmp < EM_MAX_SLOTS)
986 emp = &pp->em_priv[pmp];
990 /* mask off the activity bits if we are in sw_activity
991 * mode, user should turn off sw_activity before setting
992 * activity led through em_message
994 if (emp->blink_policy)
995 state &= ~EM_MSG_LED_VALUE_ACTIVITY;
997 return ahci_transmit_led_message(ap, state, size);
1000 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
1002 struct ata_link *link = dev->link;
1003 struct ata_port *ap = link->ap;
1004 struct ahci_port_priv *pp = ap->private_data;
1005 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1006 u32 port_led_state = emp->led_state;
1008 /* save the desired Activity LED behavior */
1011 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
1013 /* set the LED to OFF */
1014 port_led_state &= EM_MSG_LED_VALUE_OFF;
1015 port_led_state |= (ap->port_no | (link->pmp << 8));
1016 ahci_transmit_led_message(ap, port_led_state, 4);
1018 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1019 if (val == BLINK_OFF) {
1020 /* set LED to ON for idle */
1021 port_led_state &= EM_MSG_LED_VALUE_OFF;
1022 port_led_state |= (ap->port_no | (link->pmp << 8));
1023 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */
1024 ahci_transmit_led_message(ap, port_led_state, 4);
1027 emp->blink_policy = val;
1031 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
1033 struct ata_link *link = dev->link;
1034 struct ata_port *ap = link->ap;
1035 struct ahci_port_priv *pp = ap->private_data;
1036 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1038 /* display the saved value of activity behavior for this
1041 return sprintf(buf, "%d\n", emp->blink_policy);
1044 static void ahci_port_init(struct device *dev, struct ata_port *ap,
1045 int port_no, void __iomem *mmio,
1046 void __iomem *port_mmio)
1048 const char *emsg = NULL;
1052 /* make sure port is not active */
1053 rc = ahci_deinit_port(ap, &emsg);
1055 dev_warn(dev, "%s (%d)\n", emsg, rc);
1058 tmp = readl(port_mmio + PORT_SCR_ERR);
1059 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1060 writel(tmp, port_mmio + PORT_SCR_ERR);
1062 /* clear port IRQ */
1063 tmp = readl(port_mmio + PORT_IRQ_STAT);
1064 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1066 writel(tmp, port_mmio + PORT_IRQ_STAT);
1068 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1071 void ahci_init_controller(struct ata_host *host)
1073 struct ahci_host_priv *hpriv = host->private_data;
1074 void __iomem *mmio = hpriv->mmio;
1076 void __iomem *port_mmio;
1079 for (i = 0; i < host->n_ports; i++) {
1080 struct ata_port *ap = host->ports[i];
1082 port_mmio = ahci_port_base(ap);
1083 if (ata_port_is_dummy(ap))
1086 ahci_port_init(host->dev, ap, i, mmio, port_mmio);
1089 tmp = readl(mmio + HOST_CTL);
1090 VPRINTK("HOST_CTL 0x%x\n", tmp);
1091 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1092 tmp = readl(mmio + HOST_CTL);
1093 VPRINTK("HOST_CTL 0x%x\n", tmp);
1095 EXPORT_SYMBOL_GPL(ahci_init_controller);
1097 static void ahci_dev_config(struct ata_device *dev)
1099 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1101 if (hpriv->flags & AHCI_HFLAG_SECT255) {
1102 dev->max_sectors = 255;
1103 ata_dev_printk(dev, KERN_INFO,
1104 "SB600 AHCI: limiting to 255 sectors per cmd\n");
1108 static unsigned int ahci_dev_classify(struct ata_port *ap)
1110 void __iomem *port_mmio = ahci_port_base(ap);
1111 struct ata_taskfile tf;
1114 tmp = readl(port_mmio + PORT_SIG);
1115 tf.lbah = (tmp >> 24) & 0xff;
1116 tf.lbam = (tmp >> 16) & 0xff;
1117 tf.lbal = (tmp >> 8) & 0xff;
1118 tf.nsect = (tmp) & 0xff;
1120 return ata_dev_classify(&tf);
1123 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1126 dma_addr_t cmd_tbl_dma;
1128 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1130 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1131 pp->cmd_slot[tag].status = 0;
1132 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1133 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1136 int ahci_kick_engine(struct ata_port *ap)
1138 void __iomem *port_mmio = ahci_port_base(ap);
1139 struct ahci_host_priv *hpriv = ap->host->private_data;
1140 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1145 rc = ahci_stop_engine(ap);
1150 * always do CLO if PMP is attached (AHCI-1.3 9.2)
1152 busy = status & (ATA_BUSY | ATA_DRQ);
1153 if (!busy && !sata_pmp_attached(ap)) {
1158 if (!(hpriv->cap & HOST_CAP_CLO)) {
1164 tmp = readl(port_mmio + PORT_CMD);
1165 tmp |= PORT_CMD_CLO;
1166 writel(tmp, port_mmio + PORT_CMD);
1169 tmp = ata_wait_register(port_mmio + PORT_CMD,
1170 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1171 if (tmp & PORT_CMD_CLO)
1174 /* restart engine */
1176 ahci_start_engine(ap);
1179 EXPORT_SYMBOL_GPL(ahci_kick_engine);
1181 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1182 struct ata_taskfile *tf, int is_cmd, u16 flags,
1183 unsigned long timeout_msec)
1185 const u32 cmd_fis_len = 5; /* five dwords */
1186 struct ahci_port_priv *pp = ap->private_data;
1187 void __iomem *port_mmio = ahci_port_base(ap);
1188 u8 *fis = pp->cmd_tbl;
1191 /* prep the command */
1192 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1193 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1196 writel(1, port_mmio + PORT_CMD_ISSUE);
1199 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
1202 ahci_kick_engine(ap);
1206 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1211 int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1212 int pmp, unsigned long deadline,
1213 int (*check_ready)(struct ata_link *link))
1215 struct ata_port *ap = link->ap;
1216 struct ahci_host_priv *hpriv = ap->host->private_data;
1217 const char *reason = NULL;
1218 unsigned long now, msecs;
1219 struct ata_taskfile tf;
1224 /* prepare for SRST (AHCI-1.1 10.4.1) */
1225 rc = ahci_kick_engine(ap);
1226 if (rc && rc != -EOPNOTSUPP)
1227 ata_link_printk(link, KERN_WARNING,
1228 "failed to reset engine (errno=%d)\n", rc);
1230 ata_tf_init(link->device, &tf);
1232 /* issue the first D2H Register FIS */
1235 if (time_after(now, deadline))
1236 msecs = jiffies_to_msecs(deadline - now);
1239 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1240 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1242 reason = "1st FIS failed";
1246 /* spec says at least 5us, but be generous and sleep for 1ms */
1249 /* issue the second D2H Register FIS */
1250 tf.ctl &= ~ATA_SRST;
1251 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1253 /* wait for link to become ready */
1254 rc = ata_wait_after_reset(link, deadline, check_ready);
1255 if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) {
1257 * Workaround for cases where link online status can't
1258 * be trusted. Treat device readiness timeout as link
1261 ata_link_printk(link, KERN_INFO,
1262 "device not ready, treating as offline\n");
1263 *class = ATA_DEV_NONE;
1265 /* link occupied, -ENODEV too is an error */
1266 reason = "device not ready";
1269 *class = ahci_dev_classify(ap);
1271 DPRINTK("EXIT, class=%u\n", *class);
1275 ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
1279 int ahci_check_ready(struct ata_link *link)
1281 void __iomem *port_mmio = ahci_port_base(link->ap);
1282 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1284 return ata_check_ready(status);
1286 EXPORT_SYMBOL_GPL(ahci_check_ready);
1288 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1289 unsigned long deadline)
1291 int pmp = sata_srst_pmp(link);
1295 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
1297 EXPORT_SYMBOL_GPL(ahci_do_softreset);
1299 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1300 unsigned long deadline)
1302 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
1303 struct ata_port *ap = link->ap;
1304 struct ahci_port_priv *pp = ap->private_data;
1305 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1306 struct ata_taskfile tf;
1312 ahci_stop_engine(ap);
1314 /* clear D2H reception area to properly wait for D2H FIS */
1315 ata_tf_init(link->device, &tf);
1317 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1319 rc = sata_link_hardreset(link, timing, deadline, &online,
1322 ahci_start_engine(ap);
1325 *class = ahci_dev_classify(ap);
1327 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1331 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1333 struct ata_port *ap = link->ap;
1334 void __iomem *port_mmio = ahci_port_base(ap);
1337 ata_std_postreset(link, class);
1339 /* Make sure port's ATAPI bit is set appropriately */
1340 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1341 if (*class == ATA_DEV_ATAPI)
1342 new_tmp |= PORT_CMD_ATAPI;
1344 new_tmp &= ~PORT_CMD_ATAPI;
1345 if (new_tmp != tmp) {
1346 writel(new_tmp, port_mmio + PORT_CMD);
1347 readl(port_mmio + PORT_CMD); /* flush */
1351 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1353 struct scatterlist *sg;
1354 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1360 * Next, the S/G list.
1362 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1363 dma_addr_t addr = sg_dma_address(sg);
1364 u32 sg_len = sg_dma_len(sg);
1366 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
1367 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
1368 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
1374 static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc)
1376 struct ata_port *ap = qc->ap;
1377 struct ahci_port_priv *pp = ap->private_data;
1379 if (!sata_pmp_attached(ap) || pp->fbs_enabled)
1380 return ata_std_qc_defer(qc);
1382 return sata_pmp_qc_defer_cmd_switch(qc);
1385 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1387 struct ata_port *ap = qc->ap;
1388 struct ahci_port_priv *pp = ap->private_data;
1389 int is_atapi = ata_is_atapi(qc->tf.protocol);
1392 const u32 cmd_fis_len = 5; /* five dwords */
1393 unsigned int n_elem;
1396 * Fill in command table information. First, the header,
1397 * a SATA Register - Host to Device command FIS.
1399 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1401 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1403 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1404 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1408 if (qc->flags & ATA_QCFLAG_DMAMAP)
1409 n_elem = ahci_fill_sg(qc, cmd_tbl);
1412 * Fill in command slot information.
1414 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1415 if (qc->tf.flags & ATA_TFLAG_WRITE)
1416 opts |= AHCI_CMD_WRITE;
1418 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1420 ahci_fill_cmd_slot(pp, qc->tag, opts);
1423 static void ahci_fbs_dec_intr(struct ata_port *ap)
1425 struct ahci_port_priv *pp = ap->private_data;
1426 void __iomem *port_mmio = ahci_port_base(ap);
1427 u32 fbs = readl(port_mmio + PORT_FBS);
1431 BUG_ON(!pp->fbs_enabled);
1433 /* time to wait for DEC is not specified by AHCI spec,
1434 * add a retry loop for safety.
1436 writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS);
1437 fbs = readl(port_mmio + PORT_FBS);
1438 while ((fbs & PORT_FBS_DEC) && retries--) {
1440 fbs = readl(port_mmio + PORT_FBS);
1443 if (fbs & PORT_FBS_DEC)
1444 dev_printk(KERN_ERR, ap->host->dev,
1445 "failed to clear device error\n");
1448 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1450 struct ahci_host_priv *hpriv = ap->host->private_data;
1451 struct ahci_port_priv *pp = ap->private_data;
1452 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1453 struct ata_link *link = NULL;
1454 struct ata_queued_cmd *active_qc;
1455 struct ata_eh_info *active_ehi;
1456 bool fbs_need_dec = false;
1459 /* determine active link with error */
1460 if (pp->fbs_enabled) {
1461 void __iomem *port_mmio = ahci_port_base(ap);
1462 u32 fbs = readl(port_mmio + PORT_FBS);
1463 int pmp = fbs >> PORT_FBS_DWE_OFFSET;
1465 if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links) &&
1466 ata_link_online(&ap->pmp_link[pmp])) {
1467 link = &ap->pmp_link[pmp];
1468 fbs_need_dec = true;
1472 ata_for_each_link(link, ap, EDGE)
1473 if (ata_link_active(link))
1479 active_qc = ata_qc_from_tag(ap, link->active_tag);
1480 active_ehi = &link->eh_info;
1482 /* record irq stat */
1483 ata_ehi_clear_desc(host_ehi);
1484 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1486 /* AHCI needs SError cleared; otherwise, it might lock up */
1487 ahci_scr_read(&ap->link, SCR_ERROR, &serror);
1488 ahci_scr_write(&ap->link, SCR_ERROR, serror);
1489 host_ehi->serror |= serror;
1491 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1492 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1493 irq_stat &= ~PORT_IRQ_IF_ERR;
1495 if (irq_stat & PORT_IRQ_TF_ERR) {
1496 /* If qc is active, charge it; otherwise, the active
1497 * link. There's no active qc on NCQ errors. It will
1498 * be determined by EH by reading log page 10h.
1501 active_qc->err_mask |= AC_ERR_DEV;
1503 active_ehi->err_mask |= AC_ERR_DEV;
1505 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1506 host_ehi->serror &= ~SERR_INTERNAL;
1509 if (irq_stat & PORT_IRQ_UNK_FIS) {
1510 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1512 active_ehi->err_mask |= AC_ERR_HSM;
1513 active_ehi->action |= ATA_EH_RESET;
1514 ata_ehi_push_desc(active_ehi,
1515 "unknown FIS %08x %08x %08x %08x" ,
1516 unk[0], unk[1], unk[2], unk[3]);
1519 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) {
1520 active_ehi->err_mask |= AC_ERR_HSM;
1521 active_ehi->action |= ATA_EH_RESET;
1522 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1525 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1526 host_ehi->err_mask |= AC_ERR_HOST_BUS;
1527 host_ehi->action |= ATA_EH_RESET;
1528 ata_ehi_push_desc(host_ehi, "host bus error");
1531 if (irq_stat & PORT_IRQ_IF_ERR) {
1533 active_ehi->err_mask |= AC_ERR_DEV;
1535 host_ehi->err_mask |= AC_ERR_ATA_BUS;
1536 host_ehi->action |= ATA_EH_RESET;
1539 ata_ehi_push_desc(host_ehi, "interface fatal error");
1542 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1543 ata_ehi_hotplugged(host_ehi);
1544 ata_ehi_push_desc(host_ehi, "%s",
1545 irq_stat & PORT_IRQ_CONNECT ?
1546 "connection status changed" : "PHY RDY changed");
1549 /* okay, let's hand over to EH */
1551 if (irq_stat & PORT_IRQ_FREEZE)
1552 ata_port_freeze(ap);
1553 else if (fbs_need_dec) {
1554 ata_link_abort(link);
1555 ahci_fbs_dec_intr(ap);
1560 static void ahci_port_intr(struct ata_port *ap)
1562 void __iomem *port_mmio = ahci_port_base(ap);
1563 struct ata_eh_info *ehi = &ap->link.eh_info;
1564 struct ahci_port_priv *pp = ap->private_data;
1565 struct ahci_host_priv *hpriv = ap->host->private_data;
1566 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
1567 u32 status, qc_active = 0;
1570 status = readl(port_mmio + PORT_IRQ_STAT);
1571 writel(status, port_mmio + PORT_IRQ_STAT);
1573 /* ignore BAD_PMP while resetting */
1574 if (unlikely(resetting))
1575 status &= ~PORT_IRQ_BAD_PMP;
1577 /* If we are getting PhyRdy, this is
1578 * just a power state change, we should
1579 * clear out this, plus the PhyRdy/Comm
1580 * Wake bits from Serror
1582 if ((hpriv->flags & AHCI_HFLAG_NO_HOTPLUG) &&
1583 (status & PORT_IRQ_PHYRDY)) {
1584 status &= ~PORT_IRQ_PHYRDY;
1585 ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18)));
1588 if (unlikely(status & PORT_IRQ_ERROR)) {
1589 ahci_error_intr(ap, status);
1593 if (status & PORT_IRQ_SDB_FIS) {
1594 /* If SNotification is available, leave notification
1595 * handling to sata_async_notification(). If not,
1596 * emulate it by snooping SDB FIS RX area.
1598 * Snooping FIS RX area is probably cheaper than
1599 * poking SNotification but some constrollers which
1600 * implement SNotification, ICH9 for example, don't
1601 * store AN SDB FIS into receive area.
1603 if (hpriv->cap & HOST_CAP_SNTF)
1604 sata_async_notification(ap);
1606 /* If the 'N' bit in word 0 of the FIS is set,
1607 * we just received asynchronous notification.
1608 * Tell libata about it.
1610 * Lack of SNotification should not appear in
1611 * ahci 1.2, so the workaround is unnecessary
1612 * when FBS is enabled.
1614 if (pp->fbs_enabled)
1617 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1618 u32 f0 = le32_to_cpu(f[0]);
1620 sata_async_notification(ap);
1625 /* pp->active_link is not reliable once FBS is enabled, both
1626 * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because
1627 * NCQ and non-NCQ commands may be in flight at the same time.
1629 if (pp->fbs_enabled) {
1630 if (ap->qc_active) {
1631 qc_active = readl(port_mmio + PORT_SCR_ACT);
1632 qc_active |= readl(port_mmio + PORT_CMD_ISSUE);
1635 /* pp->active_link is valid iff any command is in flight */
1636 if (ap->qc_active && pp->active_link->sactive)
1637 qc_active = readl(port_mmio + PORT_SCR_ACT);
1639 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1643 rc = ata_qc_complete_multiple(ap, qc_active);
1645 /* while resetting, invalid completions are expected */
1646 if (unlikely(rc < 0 && !resetting)) {
1647 ehi->err_mask |= AC_ERR_HSM;
1648 ehi->action |= ATA_EH_RESET;
1649 ata_port_freeze(ap);
1653 irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1655 struct ata_host *host = dev_instance;
1656 struct ahci_host_priv *hpriv;
1657 unsigned int i, handled = 0;
1659 u32 irq_stat, irq_masked;
1663 hpriv = host->private_data;
1666 /* sigh. 0xffffffff is a valid return from h/w */
1667 irq_stat = readl(mmio + HOST_IRQ_STAT);
1671 irq_masked = irq_stat & hpriv->port_map;
1673 spin_lock(&host->lock);
1675 for (i = 0; i < host->n_ports; i++) {
1676 struct ata_port *ap;
1678 if (!(irq_masked & (1 << i)))
1681 ap = host->ports[i];
1684 VPRINTK("port %u\n", i);
1686 VPRINTK("port %u (no irq)\n", i);
1687 if (ata_ratelimit())
1688 dev_printk(KERN_WARNING, host->dev,
1689 "interrupt on disabled port %u\n", i);
1695 /* HOST_IRQ_STAT behaves as level triggered latch meaning that
1696 * it should be cleared after all the port events are cleared;
1697 * otherwise, it will raise a spurious interrupt after each
1698 * valid one. Please read section 10.6.2 of ahci 1.1 for more
1701 * Also, use the unmasked value to clear interrupt as spurious
1702 * pending event on a dummy port might cause screaming IRQ.
1704 writel(irq_stat, mmio + HOST_IRQ_STAT);
1706 spin_unlock(&host->lock);
1710 return IRQ_RETVAL(handled);
1712 EXPORT_SYMBOL_GPL(ahci_interrupt);
1714 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1716 struct ata_port *ap = qc->ap;
1717 void __iomem *port_mmio = ahci_port_base(ap);
1718 struct ahci_port_priv *pp = ap->private_data;
1720 /* Keep track of the currently active link. It will be used
1721 * in completion path to determine whether NCQ phase is in
1724 pp->active_link = qc->dev->link;
1726 if (qc->tf.protocol == ATA_PROT_NCQ)
1727 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1729 if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) {
1730 u32 fbs = readl(port_mmio + PORT_FBS);
1731 fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC);
1732 fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET;
1733 writel(fbs, port_mmio + PORT_FBS);
1734 pp->fbs_last_dev = qc->dev->link->pmp;
1737 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1739 ahci_sw_activity(qc->dev->link);
1744 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
1746 struct ahci_port_priv *pp = qc->ap->private_data;
1747 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1749 if (pp->fbs_enabled)
1750 d2h_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
1752 ata_tf_from_fis(d2h_fis, &qc->result_tf);
1756 static void ahci_freeze(struct ata_port *ap)
1758 void __iomem *port_mmio = ahci_port_base(ap);
1761 writel(0, port_mmio + PORT_IRQ_MASK);
1764 static void ahci_thaw(struct ata_port *ap)
1766 struct ahci_host_priv *hpriv = ap->host->private_data;
1767 void __iomem *mmio = hpriv->mmio;
1768 void __iomem *port_mmio = ahci_port_base(ap);
1770 struct ahci_port_priv *pp = ap->private_data;
1773 tmp = readl(port_mmio + PORT_IRQ_STAT);
1774 writel(tmp, port_mmio + PORT_IRQ_STAT);
1775 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1777 /* turn IRQ back on */
1778 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1781 static void ahci_error_handler(struct ata_port *ap)
1783 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1784 /* restart engine */
1785 ahci_stop_engine(ap);
1786 ahci_start_engine(ap);
1789 sata_pmp_error_handler(ap);
1792 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1794 struct ata_port *ap = qc->ap;
1796 /* make DMA engine forget about the failed command */
1797 if (qc->flags & ATA_QCFLAG_FAILED)
1798 ahci_kick_engine(ap);
1801 static void ahci_enable_fbs(struct ata_port *ap)
1803 struct ahci_port_priv *pp = ap->private_data;
1804 void __iomem *port_mmio = ahci_port_base(ap);
1808 if (!pp->fbs_supported)
1811 fbs = readl(port_mmio + PORT_FBS);
1812 if (fbs & PORT_FBS_EN) {
1813 pp->fbs_enabled = true;
1814 pp->fbs_last_dev = -1; /* initialization */
1818 rc = ahci_stop_engine(ap);
1822 writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS);
1823 fbs = readl(port_mmio + PORT_FBS);
1824 if (fbs & PORT_FBS_EN) {
1825 dev_printk(KERN_INFO, ap->host->dev, "FBS is enabled.\n");
1826 pp->fbs_enabled = true;
1827 pp->fbs_last_dev = -1; /* initialization */
1829 dev_printk(KERN_ERR, ap->host->dev, "Failed to enable FBS\n");
1831 ahci_start_engine(ap);
1834 static void ahci_disable_fbs(struct ata_port *ap)
1836 struct ahci_port_priv *pp = ap->private_data;
1837 void __iomem *port_mmio = ahci_port_base(ap);
1841 if (!pp->fbs_supported)
1844 fbs = readl(port_mmio + PORT_FBS);
1845 if ((fbs & PORT_FBS_EN) == 0) {
1846 pp->fbs_enabled = false;
1850 rc = ahci_stop_engine(ap);
1854 writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS);
1855 fbs = readl(port_mmio + PORT_FBS);
1856 if (fbs & PORT_FBS_EN)
1857 dev_printk(KERN_ERR, ap->host->dev, "Failed to disable FBS\n");
1859 dev_printk(KERN_INFO, ap->host->dev, "FBS is disabled.\n");
1860 pp->fbs_enabled = false;
1863 ahci_start_engine(ap);
1866 static void ahci_pmp_attach(struct ata_port *ap)
1868 void __iomem *port_mmio = ahci_port_base(ap);
1869 struct ahci_port_priv *pp = ap->private_data;
1872 cmd = readl(port_mmio + PORT_CMD);
1873 cmd |= PORT_CMD_PMP;
1874 writel(cmd, port_mmio + PORT_CMD);
1876 ahci_enable_fbs(ap);
1878 pp->intr_mask |= PORT_IRQ_BAD_PMP;
1879 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1882 static void ahci_pmp_detach(struct ata_port *ap)
1884 void __iomem *port_mmio = ahci_port_base(ap);
1885 struct ahci_port_priv *pp = ap->private_data;
1888 ahci_disable_fbs(ap);
1890 cmd = readl(port_mmio + PORT_CMD);
1891 cmd &= ~PORT_CMD_PMP;
1892 writel(cmd, port_mmio + PORT_CMD);
1894 pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
1895 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1898 static int ahci_port_resume(struct ata_port *ap)
1901 ahci_start_port(ap);
1903 if (sata_pmp_attached(ap))
1904 ahci_pmp_attach(ap);
1906 ahci_pmp_detach(ap);
1912 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1914 const char *emsg = NULL;
1917 rc = ahci_deinit_port(ap, &emsg);
1919 ahci_power_down(ap);
1921 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1922 ahci_start_port(ap);
1929 static int ahci_port_start(struct ata_port *ap)
1931 struct ahci_host_priv *hpriv = ap->host->private_data;
1932 struct device *dev = ap->host->dev;
1933 struct ahci_port_priv *pp;
1936 size_t dma_sz, rx_fis_sz;
1938 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1942 /* check FBS capability */
1943 if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) {
1944 void __iomem *port_mmio = ahci_port_base(ap);
1945 u32 cmd = readl(port_mmio + PORT_CMD);
1946 if (cmd & PORT_CMD_FBSCP)
1947 pp->fbs_supported = true;
1949 dev_printk(KERN_WARNING, dev,
1950 "The port is not capable of FBS\n");
1953 if (pp->fbs_supported) {
1954 dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ;
1955 rx_fis_sz = AHCI_RX_FIS_SZ * 16;
1957 dma_sz = AHCI_PORT_PRIV_DMA_SZ;
1958 rx_fis_sz = AHCI_RX_FIS_SZ;
1961 mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL);
1964 memset(mem, 0, dma_sz);
1967 * First item in chunk of DMA memory: 32-slot command table,
1968 * 32 bytes each in size
1971 pp->cmd_slot_dma = mem_dma;
1973 mem += AHCI_CMD_SLOT_SZ;
1974 mem_dma += AHCI_CMD_SLOT_SZ;
1977 * Second item: Received-FIS area
1980 pp->rx_fis_dma = mem_dma;
1983 mem_dma += rx_fis_sz;
1986 * Third item: data area for storing a single command
1987 * and its scatter-gather table
1990 pp->cmd_tbl_dma = mem_dma;
1993 * Save off initial list of interrupts to be enabled.
1994 * This could be changed later
1996 pp->intr_mask = DEF_PORT_IRQ;
1998 ap->private_data = pp;
2000 /* engage engines, captain */
2001 return ahci_port_resume(ap);
2004 static void ahci_port_stop(struct ata_port *ap)
2006 const char *emsg = NULL;
2009 /* de-initialize port */
2010 rc = ahci_deinit_port(ap, &emsg);
2012 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
2015 void ahci_print_info(struct ata_host *host, const char *scc_s)
2017 struct ahci_host_priv *hpriv = host->private_data;
2018 void __iomem *mmio = hpriv->mmio;
2019 u32 vers, cap, cap2, impl, speed;
2020 const char *speed_s;
2022 vers = readl(mmio + HOST_VERSION);
2025 impl = hpriv->port_map;
2027 speed = (cap >> 20) & 0xf;
2030 else if (speed == 2)
2032 else if (speed == 3)
2038 "AHCI %02x%02x.%02x%02x "
2039 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2042 (vers >> 24) & 0xff,
2043 (vers >> 16) & 0xff,
2047 ((cap >> 8) & 0x1f) + 1,
2060 cap & HOST_CAP_64 ? "64bit " : "",
2061 cap & HOST_CAP_NCQ ? "ncq " : "",
2062 cap & HOST_CAP_SNTF ? "sntf " : "",
2063 cap & HOST_CAP_MPS ? "ilck " : "",
2064 cap & HOST_CAP_SSS ? "stag " : "",
2065 cap & HOST_CAP_ALPM ? "pm " : "",
2066 cap & HOST_CAP_LED ? "led " : "",
2067 cap & HOST_CAP_CLO ? "clo " : "",
2068 cap & HOST_CAP_ONLY ? "only " : "",
2069 cap & HOST_CAP_PMP ? "pmp " : "",
2070 cap & HOST_CAP_FBS ? "fbs " : "",
2071 cap & HOST_CAP_PIO_MULTI ? "pio " : "",
2072 cap & HOST_CAP_SSC ? "slum " : "",
2073 cap & HOST_CAP_PART ? "part " : "",
2074 cap & HOST_CAP_CCC ? "ccc " : "",
2075 cap & HOST_CAP_EMS ? "ems " : "",
2076 cap & HOST_CAP_SXS ? "sxs " : "",
2077 cap2 & HOST_CAP2_APST ? "apst " : "",
2078 cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "",
2079 cap2 & HOST_CAP2_BOH ? "boh " : ""
2082 EXPORT_SYMBOL_GPL(ahci_print_info);
2084 void ahci_set_em_messages(struct ahci_host_priv *hpriv,
2085 struct ata_port_info *pi)
2088 void __iomem *mmio = hpriv->mmio;
2089 u32 em_loc = readl(mmio + HOST_EM_LOC);
2090 u32 em_ctl = readl(mmio + HOST_EM_CTL);
2092 if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS))
2095 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16;
2097 /* we only support LED message type right now */
2098 if ((messages & 0x01) && (ahci_em_messages == 1)) {
2100 hpriv->em_loc = ((em_loc >> 16) * 4);
2101 pi->flags |= ATA_FLAG_EM;
2102 if (!(em_ctl & EM_CTL_ALHD))
2103 pi->flags |= ATA_FLAG_SW_ACTIVITY;
2106 EXPORT_SYMBOL_GPL(ahci_set_em_messages);
2108 MODULE_AUTHOR("Jeff Garzik");
2109 MODULE_DESCRIPTION("Common AHCI SATA low-level routines");
2110 MODULE_LICENSE("GPL");