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)
406 struct acpi_buffer output;
407 union acpi_object *out_obj;
410 /* if _GTF is cached, use the cached value */
411 if (dev->gtf_cache) {
412 out_obj = dev->gtf_cache;
416 /* set up output buffer */
417 output.length = ACPI_ALLOCATE_BUFFER;
418 output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
420 /* _GTF has no input parameters */
421 status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL,
423 out_obj = dev->gtf_cache = output.pointer;
425 if (ACPI_FAILURE(status)) {
426 if (status != AE_NOT_FOUND) {
427 ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n",
434 if (!output.length || !output.pointer) {
435 ata_dev_dbg(dev, "Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n",
436 (unsigned long long)output.length,
442 if (out_obj->type != ACPI_TYPE_BUFFER) {
443 ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n",
449 if (out_obj->buffer.length % REGS_PER_GTF) {
450 ata_dev_warn(dev, "unexpected _GTF length (%d)\n",
451 out_obj->buffer.length);
457 rc = out_obj->buffer.length / REGS_PER_GTF;
459 *gtf = (void *)out_obj->buffer.pointer;
460 ata_dev_dbg(dev, "returning gtf=%p, gtf_count=%d\n",
466 ata_acpi_clear_gtf(dev);
471 * ata_acpi_gtm_xfermask - determine xfermode from GTM parameter
472 * @dev: target device
473 * @gtm: GTM parameter to use
475 * Determine xfermask for @dev from @gtm.
481 * Determined xfermask.
483 unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
484 const struct ata_acpi_gtm *gtm)
486 unsigned int xfer_mask = 0;
491 /* we always use the 0 slot for crap hardware */
493 if (!(gtm->flags & 0x10))
497 mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
498 xfer_mask |= ata_xfer_mode2mask(mode);
500 /* See if we have MWDMA or UDMA data. We don't bother with
501 * MWDMA if UDMA is available as this means the BIOS set UDMA
502 * and our error changedown if it works is UDMA to PIO anyway.
504 if (!(gtm->flags & (1 << (2 * unit))))
505 type = ATA_SHIFT_MWDMA;
507 type = ATA_SHIFT_UDMA;
509 mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
510 xfer_mask |= ata_xfer_mode2mask(mode);
514 EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
517 * ata_acpi_cbl_80wire - Check for 80 wire cable
519 * @gtm: GTM data to use
521 * Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
523 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
525 struct ata_device *dev;
527 ata_for_each_dev(dev, &ap->link, ENABLED) {
528 unsigned int xfer_mask, udma_mask;
530 xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
531 ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
533 if (udma_mask & ~ATA_UDMA_MASK_40C)
539 EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
541 static void ata_acpi_gtf_to_tf(struct ata_device *dev,
542 const struct ata_acpi_gtf *gtf,
543 struct ata_taskfile *tf)
545 ata_tf_init(dev, tf);
547 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
548 tf->protocol = ATA_PROT_NODATA;
549 tf->error = gtf->tf[0]; /* 0x1f1 */
550 tf->nsect = gtf->tf[1]; /* 0x1f2 */
551 tf->lbal = gtf->tf[2]; /* 0x1f3 */
552 tf->lbam = gtf->tf[3]; /* 0x1f4 */
553 tf->lbah = gtf->tf[4]; /* 0x1f5 */
554 tf->device = gtf->tf[5]; /* 0x1f6 */
555 tf->status = gtf->tf[6]; /* 0x1f7 */
558 static int ata_acpi_filter_tf(struct ata_device *dev,
559 const struct ata_taskfile *tf,
560 const struct ata_taskfile *ptf)
562 if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) {
563 /* libata doesn't use ACPI to configure transfer mode.
564 * It will only confuse device configuration. Skip.
566 if (tf->command == ATA_CMD_SET_FEATURES &&
567 tf->feature == SETFEATURES_XFER)
571 if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) {
572 /* BIOS writers, sorry but we don't wanna lock
573 * features unless the user explicitly said so.
576 /* DEVICE CONFIGURATION FREEZE LOCK */
577 if (tf->command == ATA_CMD_CONF_OVERLAY &&
578 tf->feature == ATA_DCO_FREEZE_LOCK)
581 /* SECURITY FREEZE LOCK */
582 if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
585 /* SET MAX LOCK and SET MAX FREEZE LOCK */
586 if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
587 tf->command == ATA_CMD_SET_MAX &&
588 (tf->feature == ATA_SET_MAX_LOCK ||
589 tf->feature == ATA_SET_MAX_FREEZE_LOCK))
593 if (tf->command == ATA_CMD_SET_FEATURES &&
594 tf->feature == SETFEATURES_SATA_ENABLE) {
595 /* inhibit enabling DIPM */
596 if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM &&
597 tf->nsect == SATA_DIPM)
600 /* inhibit FPDMA non-zero offset */
601 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET &&
602 (tf->nsect == SATA_FPDMA_OFFSET ||
603 tf->nsect == SATA_FPDMA_IN_ORDER))
606 /* inhibit FPDMA auto activation */
607 if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA &&
608 tf->nsect == SATA_FPDMA_AA)
616 * ata_acpi_run_tf - send taskfile registers to host controller
617 * @dev: target ATA device
618 * @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
619 * @prev_gtf: previous command
621 * Outputs ATA taskfile to standard ATA host controller.
622 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
623 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
624 * hob_lbal, hob_lbam, and hob_lbah.
626 * This function waits for idle (!BUSY and !DRQ) after writing
627 * registers. If the control register has a new value, this
628 * function also waits for idle after writing control and before
629 * writing the remaining registers.
635 * 1 if command is executed successfully. 0 if ignored, rejected or
636 * filtered out, -errno on other errors.
638 static int ata_acpi_run_tf(struct ata_device *dev,
639 const struct ata_acpi_gtf *gtf,
640 const struct ata_acpi_gtf *prev_gtf)
642 struct ata_taskfile *pptf = NULL;
643 struct ata_taskfile tf, ptf, rtf;
644 unsigned int err_mask;
648 if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
649 && (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
650 && (gtf->tf[6] == 0))
653 ata_acpi_gtf_to_tf(dev, gtf, &tf);
655 ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
659 descr = ata_get_cmd_name(tf.command);
661 if (!ata_acpi_filter_tf(dev, &tf, pptf)) {
663 err_mask = ata_exec_internal(dev, &rtf, NULL,
664 DMA_NONE, NULL, 0, 0);
669 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x"
671 tf.command, tf.feature, tf.nsect, tf.lbal,
672 tf.lbam, tf.lbah, tf.device, descr);
678 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x"
679 "(%s) rejected by device (Stat=0x%02x Err=0x%02x)",
680 tf.command, tf.feature, tf.nsect, tf.lbal,
681 tf.lbam, tf.lbah, tf.device, descr,
682 rtf.status, rtf.error);
688 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x"
689 "(%s) failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
690 tf.command, tf.feature, tf.nsect, tf.lbal,
691 tf.lbam, tf.lbah, tf.device, descr,
692 err_mask, rtf.status, rtf.error);
698 "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x"
699 "(%s) filtered out\n",
700 tf.command, tf.feature, tf.nsect, tf.lbal,
701 tf.lbam, tf.lbah, tf.device, descr);
708 * ata_acpi_exec_tfs - get then write drive taskfile settings
709 * @dev: target ATA device
710 * @nr_executed: out parameter for the number of executed commands
712 * Evaluate _GTF and execute returned taskfiles.
718 * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
719 * -errno on other errors.
721 static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
723 struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
724 int gtf_count, i, rc;
727 rc = ata_dev_get_GTF(dev, >f);
733 for (i = 0; i < gtf_count; i++, gtf++) {
734 rc = ata_acpi_run_tf(dev, gtf, pgtf);
743 ata_acpi_clear_gtf(dev);
751 * ata_acpi_push_id - send Identify data to drive
752 * @dev: target ATA device
754 * _SDD ACPI object: for SATA mode only
755 * Must be after Identify (Packet) Device -- uses its data
756 * ATM this function never returns a failure. It is an optional
757 * method and if it fails for whatever reason, we should still
764 * 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure.
766 static int ata_acpi_push_id(struct ata_device *dev)
768 struct ata_port *ap = dev->link->ap;
770 struct acpi_object_list input;
771 union acpi_object in_params[1];
773 ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n",
774 __func__, dev->devno, ap->port_no);
776 /* Give the drive Identify data to the drive via the _SDD method */
777 /* _SDD: set up input parameters */
779 input.pointer = in_params;
780 in_params[0].type = ACPI_TYPE_BUFFER;
781 in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
782 in_params[0].buffer.pointer = (u8 *)dev->id;
783 /* Output buffer: _SDD has no output */
785 /* It's OK for _SDD to be missing too. */
786 swap_buf_le16(dev->id, ATA_ID_WORDS);
787 status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input,
789 swap_buf_le16(dev->id, ATA_ID_WORDS);
791 if (status == AE_NOT_FOUND)
794 if (ACPI_FAILURE(status)) {
795 ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status);
803 * ata_acpi_on_resume - ATA ACPI hook called on resume
804 * @ap: target ATA port
806 * This function is called when @ap is resumed - right after port
807 * itself is resumed but before any EH action is taken.
812 void ata_acpi_on_resume(struct ata_port *ap)
814 const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
815 struct ata_device *dev;
817 if (ACPI_HANDLE(&ap->tdev) && gtm) {
820 /* restore timing parameters */
821 ata_acpi_stm(ap, gtm);
823 /* _GTF should immediately follow _STM so that it can
824 * use values set by _STM. Cache _GTF result and
827 ata_for_each_dev(dev, &ap->link, ALL) {
828 ata_acpi_clear_gtf(dev);
829 if (ata_dev_enabled(dev) &&
830 ata_dev_acpi_handle(dev) &&
831 ata_dev_get_GTF(dev, NULL) >= 0)
832 dev->flags |= ATA_DFLAG_ACPI_PENDING;
835 /* SATA _GTF needs to be evaulated after _SDD and
836 * there's no reason to evaluate IDE _GTF early
837 * without _STM. Clear cache and schedule _GTF.
839 ata_for_each_dev(dev, &ap->link, ALL) {
840 ata_acpi_clear_gtf(dev);
841 if (ata_dev_enabled(dev))
842 dev->flags |= ATA_DFLAG_ACPI_PENDING;
847 static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime)
849 int d_max_in = ACPI_STATE_D3_COLD;
854 * For ATAPI, runtime D3 cold is only allowed
855 * for ZPODD in zero power ready state
857 if (dev->class == ATA_DEV_ATAPI &&
858 !(zpodd_dev_enabled(dev) && zpodd_zpready(dev)))
859 d_max_in = ACPI_STATE_D3_HOT;
862 return acpi_pm_device_sleep_state(&dev->tdev, NULL, d_max_in);
865 static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state)
867 bool runtime = PMSG_IS_AUTO(state);
868 struct ata_device *dev;
872 ata_for_each_dev(dev, &ap->link, ENABLED) {
873 handle = ata_dev_acpi_handle(dev);
877 if (!(state.event & PM_EVENT_RESUME)) {
878 acpi_state = ata_acpi_choose_suspend_state(dev, runtime);
879 if (acpi_state == ACPI_STATE_D0)
881 if (runtime && zpodd_dev_enabled(dev) &&
882 acpi_state == ACPI_STATE_D3_COLD)
883 zpodd_enable_run_wake(dev);
884 acpi_bus_set_power(handle, acpi_state);
886 if (runtime && zpodd_dev_enabled(dev))
887 zpodd_disable_run_wake(dev);
888 acpi_bus_set_power(handle, ACPI_STATE_D0);
893 /* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */
894 static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state)
896 struct ata_device *dev;
897 acpi_handle port_handle;
899 port_handle = ACPI_HANDLE(&ap->tdev);
903 /* channel first and then drives for power on and vica versa
905 if (state.event & PM_EVENT_RESUME)
906 acpi_bus_set_power(port_handle, ACPI_STATE_D0);
908 ata_for_each_dev(dev, &ap->link, ENABLED) {
909 acpi_handle dev_handle = ata_dev_acpi_handle(dev);
913 acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ?
914 ACPI_STATE_D0 : ACPI_STATE_D3_COLD);
917 if (!(state.event & PM_EVENT_RESUME))
918 acpi_bus_set_power(port_handle, ACPI_STATE_D3_COLD);
922 * ata_acpi_set_state - set the port power state
923 * @ap: target ATA port
924 * @state: state, on/off
926 * This function sets a proper ACPI D state for the device on
927 * system and runtime PM operations.
929 void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
931 if (ap->flags & ATA_FLAG_ACPI_SATA)
932 sata_acpi_set_state(ap, state);
934 pata_acpi_set_state(ap, state);
938 * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
939 * @dev: target ATA device
941 * This function is called when @dev is about to be configured.
942 * IDENTIFY data might have been modified after this hook is run.
948 * Positive number if IDENTIFY data needs to be refreshed, 0 if not,
951 int ata_acpi_on_devcfg(struct ata_device *dev)
953 struct ata_port *ap = dev->link->ap;
954 struct ata_eh_context *ehc = &ap->link.eh_context;
955 int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
959 if (!ata_dev_acpi_handle(dev))
962 /* do we need to do _GTF? */
963 if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) &&
964 !(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET)))
967 /* do _SDD if SATA */
969 rc = ata_acpi_push_id(dev);
970 if (rc && rc != -ENOENT)
975 rc = ata_acpi_exec_tfs(dev, &nr_executed);
979 dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
981 /* refresh IDENTIFY page if any _GTF command has been executed */
983 rc = ata_dev_reread_id(dev, 0);
986 "failed to IDENTIFY after ACPI commands\n");
994 /* ignore evaluation failure if we can continue safely */
995 if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
998 /* fail and let EH retry once more for unknown IO errors */
999 if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
1000 dev->flags |= ATA_DFLAG_ACPI_FAILED;
1004 dev->flags |= ATA_DFLAG_ACPI_DISABLED;
1005 ata_dev_warn(dev, "ACPI: failed the second time, disabled\n");
1007 /* We can safely continue if no _GTF command has been executed
1008 * and port is not frozen.
1010 if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
1017 * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
1018 * @dev: target ATA device
1020 * This function is called when @dev is about to be disabled.
1025 void ata_acpi_on_disable(struct ata_device *dev)
1027 ata_acpi_clear_gtf(dev);