1 // SPDX-License-Identifier: GPL-2.0-only
4 * Provides ACPI support for PATA/SATA.
6 * Copyright (C) 2006 Intel Corp.
7 * Copyright (C) 2006 Randy Dunlap
10 #include <linux/module.h>
11 #include <linux/ata.h>
12 #include <linux/delay.h>
13 #include <linux/device.h>
14 #include <linux/errno.h>
15 #include <linux/kernel.h>
16 #include <linux/acpi.h>
17 #include <linux/libata.h>
18 #include <linux/pci.h>
19 #include <linux/slab.h>
20 #include <linux/pm_runtime.h>
21 #include <scsi/scsi_device.h>
24 unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
25 module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
26 MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock, 0x4=DIPM, 0x8=FPDMA non-zero offset, 0x10=FPDMA DMA Setup FIS auto-activate)");
28 #define NO_PORT_MULT 0xffff
29 #define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
31 #define REGS_PER_GTF 7
33 u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */
36 static void ata_acpi_clear_gtf(struct ata_device *dev)
38 kfree(dev->gtf_cache);
39 dev->gtf_cache = NULL;
42 struct ata_acpi_hotplug_context {
43 struct acpi_hotplug_context hp;
46 struct ata_device *dev;
50 #define ata_hotplug_data(context) (container_of((context), struct ata_acpi_hotplug_context, hp)->data)
53 * ata_dev_acpi_handle - provide the acpi_handle for an ata_device
54 * @dev: the acpi_handle returned will correspond to this device
56 * Returns the acpi_handle for the ACPI namespace object corresponding to
57 * the ata_device passed into the function, or NULL if no such object exists
58 * or ACPI is disabled for this device due to consecutive errors.
60 acpi_handle ata_dev_acpi_handle(struct ata_device *dev)
62 return dev->flags & ATA_DFLAG_ACPI_DISABLED ?
63 NULL : ACPI_HANDLE(&dev->tdev);
66 /* @ap and @dev are the same as ata_acpi_handle_hotplug() */
67 static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
70 dev->flags |= ATA_DFLAG_DETACH;
72 struct ata_link *tlink;
73 struct ata_device *tdev;
75 ata_for_each_link(tlink, ap, EDGE)
76 ata_for_each_dev(tdev, tlink, ALL)
77 tdev->flags |= ATA_DFLAG_DETACH;
80 ata_port_schedule_eh(ap);
84 * ata_acpi_handle_hotplug - ACPI event handler backend
85 * @ap: ATA port ACPI event occurred
86 * @dev: ATA device ACPI event occurred (can be NULL)
87 * @event: ACPI event which occurred
89 * All ACPI bay / device realted events end up in this function. If
90 * the event is port-wide @dev is NULL. If the event is specific to a
91 * device, @dev points to it.
93 * Hotplug (as opposed to unplug) notification is always handled as
94 * port-wide while unplug only kills the target device on device-wide
98 * ACPI notify handler context. May sleep.
100 static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
103 struct ata_eh_info *ehi = &ap->link.eh_info;
107 spin_lock_irqsave(ap->lock, flags);
109 * When dock driver calls into the routine, it will always use
110 * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
111 * ACPI_NOTIFY_EJECT_REQUEST for remove
114 case ACPI_NOTIFY_BUS_CHECK:
115 case ACPI_NOTIFY_DEVICE_CHECK:
116 ata_ehi_push_desc(ehi, "ACPI event");
118 ata_ehi_hotplugged(ehi);
121 case ACPI_NOTIFY_EJECT_REQUEST:
122 ata_ehi_push_desc(ehi, "ACPI event");
124 ata_acpi_detach_device(ap, dev);
129 spin_unlock_irqrestore(ap->lock, flags);
132 ata_port_wait_eh(ap);
135 static int ata_acpi_dev_notify_dock(struct acpi_device *adev, u32 event)
137 struct ata_device *dev = ata_hotplug_data(adev->hp).dev;
138 ata_acpi_handle_hotplug(dev->link->ap, dev, event);
142 static int ata_acpi_ap_notify_dock(struct acpi_device *adev, u32 event)
144 ata_acpi_handle_hotplug(ata_hotplug_data(adev->hp).ap, NULL, event);
148 static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
151 struct kobject *kobj = NULL;
152 char event_string[20];
153 char *envp[] = { event_string, NULL };
157 kobj = &dev->sdev->sdev_gendev.kobj;
159 kobj = &ap->dev->kobj;
162 snprintf(event_string, 20, "BAY_EVENT=%d", event);
163 kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
167 static void ata_acpi_ap_uevent(struct acpi_device *adev, u32 event)
169 ata_acpi_uevent(ata_hotplug_data(adev->hp).ap, NULL, event);
172 static void ata_acpi_dev_uevent(struct acpi_device *adev, u32 event)
174 struct ata_device *dev = ata_hotplug_data(adev->hp).dev;
175 ata_acpi_uevent(dev->link->ap, dev, event);
178 /* bind acpi handle to pata port */
179 void ata_acpi_bind_port(struct ata_port *ap)
181 struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev);
182 struct acpi_device *adev;
183 struct ata_acpi_hotplug_context *context;
185 if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA || !host_companion)
188 acpi_preset_companion(&ap->tdev, host_companion, ap->port_no);
190 if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
191 ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
193 adev = ACPI_COMPANION(&ap->tdev);
194 if (!adev || adev->hp)
197 context = kzalloc(sizeof(*context), GFP_KERNEL);
201 context->data.ap = ap;
202 acpi_initialize_hp_context(adev, &context->hp, ata_acpi_ap_notify_dock,
206 void ata_acpi_bind_dev(struct ata_device *dev)
208 struct ata_port *ap = dev->link->ap;
209 struct acpi_device *port_companion = ACPI_COMPANION(&ap->tdev);
210 struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev);
211 struct acpi_device *parent, *adev;
212 struct ata_acpi_hotplug_context *context;
216 * For both sata/pata devices, host companion device is required.
217 * For pata device, port companion device is also required.
219 if (libata_noacpi || !host_companion ||
220 (!(ap->flags & ATA_FLAG_ACPI_SATA) && !port_companion))
223 if (ap->flags & ATA_FLAG_ACPI_SATA) {
224 if (!sata_pmp_attached(ap))
225 adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
227 adr = SATA_ADR(ap->port_no, dev->link->pmp);
228 parent = host_companion;
231 parent = port_companion;
234 acpi_preset_companion(&dev->tdev, parent, adr);
235 adev = ACPI_COMPANION(&dev->tdev);
236 if (!adev || adev->hp)
239 context = kzalloc(sizeof(*context), GFP_KERNEL);
243 context->data.dev = dev;
244 acpi_initialize_hp_context(adev, &context->hp, ata_acpi_dev_notify_dock,
245 ata_acpi_dev_uevent);
249 * ata_acpi_dissociate - dissociate ATA host from ACPI objects
250 * @host: target ATA host
252 * This function is called during driver detach after the whole host
258 void ata_acpi_dissociate(struct ata_host *host)
262 /* Restore initial _GTM values so that driver which attaches
263 * afterward can use them too.
265 for (i = 0; i < host->n_ports; i++) {
266 struct ata_port *ap = host->ports[i];
267 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
269 if (ACPI_HANDLE(&ap->tdev) && gtm)
270 ata_acpi_stm(ap, gtm);
275 * ata_acpi_gtm - execute _GTM
276 * @ap: target ATA port
277 * @gtm: out parameter for _GTM result
279 * Evaluate _GTM and store the result in @gtm.
285 * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
287 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
289 struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
290 union acpi_object *out_obj;
293 acpi_handle handle = ACPI_HANDLE(&ap->tdev);
298 status = acpi_evaluate_object(handle, "_GTM", NULL, &output);
301 if (status == AE_NOT_FOUND)
305 if (ACPI_FAILURE(status)) {
306 ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n",
311 out_obj = output.pointer;
312 if (out_obj->type != ACPI_TYPE_BUFFER) {
313 ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n",
319 if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) {
320 ata_port_err(ap, "_GTM returned invalid length %d\n",
321 out_obj->buffer.length);
325 memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm));
328 kfree(output.pointer);
332 EXPORT_SYMBOL_GPL(ata_acpi_gtm);
335 * ata_acpi_stm - execute _STM
336 * @ap: target ATA port
337 * @stm: timing parameter to _STM
339 * Evaluate _STM with timing parameter @stm.
345 * 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
347 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
350 struct ata_acpi_gtm stm_buf = *stm;
351 struct acpi_object_list input;
352 union acpi_object in_params[3];
354 in_params[0].type = ACPI_TYPE_BUFFER;
355 in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
356 in_params[0].buffer.pointer = (u8 *)&stm_buf;
357 /* Buffers for id may need byteswapping ? */
358 in_params[1].type = ACPI_TYPE_BUFFER;
359 in_params[1].buffer.length = 512;
360 in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
361 in_params[2].type = ACPI_TYPE_BUFFER;
362 in_params[2].buffer.length = 512;
363 in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
366 input.pointer = in_params;
368 status = acpi_evaluate_object(ACPI_HANDLE(&ap->tdev), "_STM",
371 if (status == AE_NOT_FOUND)
373 if (ACPI_FAILURE(status)) {
374 ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n",
381 EXPORT_SYMBOL_GPL(ata_acpi_stm);
384 * ata_dev_get_GTF - get the drive bootup default taskfile settings
385 * @dev: target ATA device
386 * @gtf: output parameter for buffer containing _GTF taskfile arrays
388 * This applies to both PATA and SATA drives.
390 * The _GTF method has no input parameters.
391 * It returns a variable number of register set values (registers
392 * hex 1F1..1F7, taskfiles).
393 * The <variable number> is not known in advance, so have ACPI-CA
394 * allocate the buffer as needed and return it, then free it later.
400 * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
401 * if _GTF is invalid.
403 static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
405 struct ata_port *ap = dev->link->ap;
407 struct acpi_buffer output;
408 union acpi_object *out_obj;
411 /* if _GTF is cached, use the cached value */
412 if (dev->gtf_cache) {
413 out_obj = dev->gtf_cache;
417 /* set up output buffer */
418 output.length = ACPI_ALLOCATE_BUFFER;
419 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
421 if (ata_msg_probe(ap))
422 ata_dev_dbg(dev, "%s: ENTER: port#: %d\n",
423 __func__, ap->port_no);
425 /* _GTF has no input parameters */
426 status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL,
428 out_obj = dev->gtf_cache = output.pointer;
430 if (ACPI_FAILURE(status)) {
431 if (status != AE_NOT_FOUND) {
432 ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n",
439 if (!output.length || !output.pointer) {
440 if (ata_msg_probe(ap))
441 ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n",
443 (unsigned long long)output.length,
449 if (out_obj->type != ACPI_TYPE_BUFFER) {
450 ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n",
456 if (out_obj->buffer.length % REGS_PER_GTF) {
457 ata_dev_warn(dev, "unexpected _GTF length (%d)\n",
458 out_obj->buffer.length);
464 rc = out_obj->buffer.length / REGS_PER_GTF;
466 *gtf = (void *)out_obj->buffer.pointer;
467 if (ata_msg_probe(ap))
468 ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n",
474 ata_acpi_clear_gtf(dev);
479 * ata_acpi_gtm_xfermask - determine xfermode from GTM parameter
480 * @dev: target device
481 * @gtm: GTM parameter to use
483 * Determine xfermask for @dev from @gtm.
489 * Determined xfermask.
491 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
492 const struct ata_acpi_gtm *gtm)
494 unsigned long xfer_mask = 0;
499 /* we always use the 0 slot for crap hardware */
501 if (!(gtm->flags & 0x10))
505 mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
506 xfer_mask |= ata_xfer_mode2mask(mode);
508 /* See if we have MWDMA or UDMA data. We don't bother with
509 * MWDMA if UDMA is available as this means the BIOS set UDMA
510 * and our error changedown if it works is UDMA to PIO anyway.
512 if (!(gtm->flags & (1 << (2 * unit))))
513 type = ATA_SHIFT_MWDMA;
515 type = ATA_SHIFT_UDMA;
517 mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
518 xfer_mask |= ata_xfer_mode2mask(mode);
522 EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
525 * ata_acpi_cbl_80wire - Check for 80 wire cable
527 * @gtm: GTM data to use
529 * Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
531 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
533 struct ata_device *dev;
535 ata_for_each_dev(dev, &ap->link, ENABLED) {
536 unsigned long xfer_mask, udma_mask;
538 xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
539 ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
541 if (udma_mask & ~ATA_UDMA_MASK_40C)
547 EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
549 static void ata_acpi_gtf_to_tf(struct ata_device *dev,
550 const struct ata_acpi_gtf *gtf,
551 struct ata_taskfile *tf)
553 ata_tf_init(dev, tf);
555 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
556 tf->protocol = ATA_PROT_NODATA;
557 tf->feature = gtf->tf[0]; /* 0x1f1 */
558 tf->nsect = gtf->tf[1]; /* 0x1f2 */
559 tf->lbal = gtf->tf[2]; /* 0x1f3 */
560 tf->lbam = gtf->tf[3]; /* 0x1f4 */
561 tf->lbah = gtf->tf[4]; /* 0x1f5 */
562 tf->device = gtf->tf[5]; /* 0x1f6 */
563 tf->command = gtf->tf[6]; /* 0x1f7 */
566 static int ata_acpi_filter_tf(struct ata_device *dev,
567 const struct ata_taskfile *tf,
568 const struct ata_taskfile *ptf)
570 if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) {
571 /* libata doesn't use ACPI to configure transfer mode.
572 * It will only confuse device configuration. Skip.
574 if (tf->command == ATA_CMD_SET_FEATURES &&
575 tf->feature == SETFEATURES_XFER)
579 if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) {
580 /* BIOS writers, sorry but we don't wanna lock
581 * features unless the user explicitly said so.
584 /* DEVICE CONFIGURATION FREEZE LOCK */
585 if (tf->command == ATA_CMD_CONF_OVERLAY &&
586 tf->feature == ATA_DCO_FREEZE_LOCK)
589 /* SECURITY FREEZE LOCK */
590 if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
593 /* SET MAX LOCK and SET MAX FREEZE LOCK */
594 if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
595 tf->command == ATA_CMD_SET_MAX &&
596 (tf->feature == ATA_SET_MAX_LOCK ||
597 tf->feature == ATA_SET_MAX_FREEZE_LOCK))
601 if (tf->command == ATA_CMD_SET_FEATURES &&
602 tf->feature == SETFEATURES_SATA_ENABLE) {
603 /* inhibit enabling DIPM */
604 if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM &&
605 tf->nsect == SATA_DIPM)
608 /* inhibit FPDMA non-zero offset */
609 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET &&
610 (tf->nsect == SATA_FPDMA_OFFSET ||
611 tf->nsect == SATA_FPDMA_IN_ORDER))
614 /* inhibit FPDMA auto activation */
615 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA &&
616 tf->nsect == SATA_FPDMA_AA)
624 * ata_acpi_run_tf - send taskfile registers to host controller
625 * @dev: target ATA device
626 * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
627 * @prev_gtf: previous command
629 * Outputs ATA taskfile to standard ATA host controller.
630 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
631 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
632 * hob_lbal, hob_lbam, and hob_lbah.
634 * This function waits for idle (!BUSY and !DRQ) after writing
635 * registers. If the control register has a new value, this
636 * function also waits for idle after writing control and before
637 * writing the remaining registers.
643 * 1 if command is executed successfully. 0 if ignored, rejected or
644 * filtered out, -errno on other errors.
646 static int ata_acpi_run_tf(struct ata_device *dev,
647 const struct ata_acpi_gtf *gtf,
648 const struct ata_acpi_gtf *prev_gtf)
650 struct ata_taskfile *pptf = NULL;
651 struct ata_taskfile tf, ptf, rtf;
652 unsigned int err_mask;
658 if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
659 && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
660 && (gtf->tf[6] == 0))
663 ata_acpi_gtf_to_tf(dev, gtf, &tf);
665 ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
669 if (!ata_acpi_filter_tf(dev, &tf, pptf)) {
671 err_mask = ata_exec_internal(dev, &rtf, NULL,
672 DMA_NONE, NULL, 0, 0);
677 snprintf(msg, sizeof(msg), "succeeded");
683 snprintf(msg, sizeof(msg),
684 "rejected by device (Stat=0x%02x Err=0x%02x)",
685 rtf.command, rtf.feature);
691 snprintf(msg, sizeof(msg),
692 "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
693 err_mask, rtf.command, rtf.feature);
699 snprintf(msg, sizeof(msg), "filtered out");
702 descr = ata_get_cmd_descript(tf.command);
704 ata_dev_printk(dev, level,
705 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n",
706 tf.command, tf.feature, tf.nsect, tf.lbal,
707 tf.lbam, tf.lbah, tf.device,
708 (descr ? descr : "unknown"), msg);
714 * ata_acpi_exec_tfs - get then write drive taskfile settings
715 * @dev: target ATA device
716 * @nr_executed: out parameter for the number of executed commands
718 * Evaluate _GTF and execute returned taskfiles.
724 * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
725 * -errno on other errors.
727 static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
729 struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
730 int gtf_count, i, rc;
733 rc = ata_dev_get_GTF(dev, >f);
739 for (i = 0; i < gtf_count; i++, gtf++) {
740 rc = ata_acpi_run_tf(dev, gtf, pgtf);
749 ata_acpi_clear_gtf(dev);
757 * ata_acpi_push_id - send Identify data to drive
758 * @dev: target ATA device
760 * _SDD ACPI object: for SATA mode only
761 * Must be after Identify (Packet) Device -- uses its data
762 * ATM this function never returns a failure. It is an optional
763 * method and if it fails for whatever reason, we should still
770 * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure.
772 static int ata_acpi_push_id(struct ata_device *dev)
774 struct ata_port *ap = dev->link->ap;
776 struct acpi_object_list input;
777 union acpi_object in_params[1];
779 if (ata_msg_probe(ap))
780 ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n",
781 __func__, dev->devno, ap->port_no);
783 /* Give the drive Identify data to the drive via the _SDD method */
784 /* _SDD: set up input parameters */
786 input.pointer = in_params;
787 in_params[0].type = ACPI_TYPE_BUFFER;
788 in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
789 in_params[0].buffer.pointer = (u8 *)dev->id;
790 /* Output buffer: _SDD has no output */
792 /* It's OK for _SDD to be missing too. */
793 swap_buf_le16(dev->id, ATA_ID_WORDS);
794 status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input,
796 swap_buf_le16(dev->id, ATA_ID_WORDS);
798 if (status == AE_NOT_FOUND)
801 if (ACPI_FAILURE(status)) {
802 ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status);
810 * ata_acpi_on_suspend - ATA ACPI hook called on suspend
811 * @ap: target ATA port
813 * This function is called when @ap is about to be suspended. All
814 * devices are already put to sleep but the port_suspend() callback
815 * hasn't been executed yet. Error return from this function aborts
822 * 0 on success, -errno on failure.
824 int ata_acpi_on_suspend(struct ata_port *ap)
831 * ata_acpi_on_resume - ATA ACPI hook called on resume
832 * @ap: target ATA port
834 * This function is called when @ap is resumed - right after port
835 * itself is resumed but before any EH action is taken.
840 void ata_acpi_on_resume(struct ata_port *ap)
842 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
843 struct ata_device *dev;
845 if (ACPI_HANDLE(&ap->tdev) && gtm) {
848 /* restore timing parameters */
849 ata_acpi_stm(ap, gtm);
851 /* _GTF should immediately follow _STM so that it can
852 * use values set by _STM. Cache _GTF result and
855 ata_for_each_dev(dev, &ap->link, ALL) {
856 ata_acpi_clear_gtf(dev);
857 if (ata_dev_enabled(dev) &&
858 ata_dev_acpi_handle(dev) &&
859 ata_dev_get_GTF(dev, NULL) >= 0)
860 dev->flags |= ATA_DFLAG_ACPI_PENDING;
863 /* SATA _GTF needs to be evaulated after _SDD and
864 * there's no reason to evaluate IDE _GTF early
865 * without _STM. Clear cache and schedule _GTF.
867 ata_for_each_dev(dev, &ap->link, ALL) {
868 ata_acpi_clear_gtf(dev);
869 if (ata_dev_enabled(dev))
870 dev->flags |= ATA_DFLAG_ACPI_PENDING;
875 static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime)
877 int d_max_in = ACPI_STATE_D3_COLD;
882 * For ATAPI, runtime D3 cold is only allowed
883 * for ZPODD in zero power ready state
885 if (dev->class == ATA_DEV_ATAPI &&
886 !(zpodd_dev_enabled(dev) && zpodd_zpready(dev)))
887 d_max_in = ACPI_STATE_D3_HOT;
890 return acpi_pm_device_sleep_state(&dev->tdev, NULL, d_max_in);
893 static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state)
895 bool runtime = PMSG_IS_AUTO(state);
896 struct ata_device *dev;
900 ata_for_each_dev(dev, &ap->link, ENABLED) {
901 handle = ata_dev_acpi_handle(dev);
905 if (!(state.event & PM_EVENT_RESUME)) {
906 acpi_state = ata_acpi_choose_suspend_state(dev, runtime);
907 if (acpi_state == ACPI_STATE_D0)
909 if (runtime && zpodd_dev_enabled(dev) &&
910 acpi_state == ACPI_STATE_D3_COLD)
911 zpodd_enable_run_wake(dev);
912 acpi_bus_set_power(handle, acpi_state);
914 if (runtime && zpodd_dev_enabled(dev))
915 zpodd_disable_run_wake(dev);
916 acpi_bus_set_power(handle, ACPI_STATE_D0);
921 /* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */
922 static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state)
924 struct ata_device *dev;
925 acpi_handle port_handle;
927 port_handle = ACPI_HANDLE(&ap->tdev);
931 /* channel first and then drives for power on and vica versa
933 if (state.event & PM_EVENT_RESUME)
934 acpi_bus_set_power(port_handle, ACPI_STATE_D0);
936 ata_for_each_dev(dev, &ap->link, ENABLED) {
937 acpi_handle dev_handle = ata_dev_acpi_handle(dev);
941 acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ?
942 ACPI_STATE_D0 : ACPI_STATE_D3_COLD);
945 if (!(state.event & PM_EVENT_RESUME))
946 acpi_bus_set_power(port_handle, ACPI_STATE_D3_COLD);
950 * ata_acpi_set_state - set the port power state
951 * @ap: target ATA port
952 * @state: state, on/off
954 * This function sets a proper ACPI D state for the device on
955 * system and runtime PM operations.
957 void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
959 if (ap->flags & ATA_FLAG_ACPI_SATA)
960 sata_acpi_set_state(ap, state);
962 pata_acpi_set_state(ap, state);
966 * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
967 * @dev: target ATA device
969 * This function is called when @dev is about to be configured.
970 * IDENTIFY data might have been modified after this hook is run.
976 * Positive number if IDENTIFY data needs to be refreshed, 0 if not,
979 int ata_acpi_on_devcfg(struct ata_device *dev)
981 struct ata_port *ap = dev->link->ap;
982 struct ata_eh_context *ehc = &ap->link.eh_context;
983 int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
987 if (!ata_dev_acpi_handle(dev))
990 /* do we need to do _GTF? */
991 if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) &&
992 !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET)))
995 /* do _SDD if SATA */
997 rc = ata_acpi_push_id(dev);
998 if (rc && rc != -ENOENT)
1003 rc = ata_acpi_exec_tfs(dev, &nr_executed);
1007 dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
1009 /* refresh IDENTIFY page if any _GTF command has been executed */
1011 rc = ata_dev_reread_id(dev, 0);
1014 "failed to IDENTIFY after ACPI commands\n");
1022 /* ignore evaluation failure if we can continue safely */
1023 if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1026 /* fail and let EH retry once more for unknown IO errors */
1027 if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
1028 dev->flags |= ATA_DFLAG_ACPI_FAILED;
1032 dev->flags |= ATA_DFLAG_ACPI_DISABLED;
1033 ata_dev_warn(dev, "ACPI: failed the second time, disabled\n");
1035 /* We can safely continue if no _GTF command has been executed
1036 * and port is not frozen.
1038 if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1045 * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
1046 * @dev: target ATA device
1048 * This function is called when @dev is about to be disabled.
1053 void ata_acpi_on_disable(struct ata_device *dev)
1055 ata_acpi_clear_gtf(dev);