1029 строки
26 KiB
C
1029 строки
26 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* libata-acpi.c
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* Provides ACPI support for PATA/SATA.
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*
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* Copyright (C) 2006 Intel Corp.
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* Copyright (C) 2006 Randy Dunlap
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*/
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#include <linux/module.h>
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#include <linux/ata.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/acpi.h>
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#include <linux/libata.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/pm_runtime.h>
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#include <scsi/scsi_device.h>
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#include "libata.h"
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unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
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module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
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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)");
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#define NO_PORT_MULT 0xffff
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#define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
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#define REGS_PER_GTF 7
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struct ata_acpi_gtf {
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u8 tf[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */
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} __packed;
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static void ata_acpi_clear_gtf(struct ata_device *dev)
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{
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kfree(dev->gtf_cache);
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dev->gtf_cache = NULL;
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}
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struct ata_acpi_hotplug_context {
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struct acpi_hotplug_context hp;
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union {
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struct ata_port *ap;
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struct ata_device *dev;
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} data;
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};
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#define ata_hotplug_data(context) (container_of((context), struct ata_acpi_hotplug_context, hp)->data)
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/**
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* ata_dev_acpi_handle - provide the acpi_handle for an ata_device
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* @dev: the acpi_handle returned will correspond to this device
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*
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* Returns the acpi_handle for the ACPI namespace object corresponding to
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* the ata_device passed into the function, or NULL if no such object exists
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* or ACPI is disabled for this device due to consecutive errors.
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*/
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acpi_handle ata_dev_acpi_handle(struct ata_device *dev)
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{
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return dev->flags & ATA_DFLAG_ACPI_DISABLED ?
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NULL : ACPI_HANDLE(&dev->tdev);
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}
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/* @ap and @dev are the same as ata_acpi_handle_hotplug() */
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static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev)
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{
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if (dev)
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dev->flags |= ATA_DFLAG_DETACH;
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else {
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struct ata_link *tlink;
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struct ata_device *tdev;
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ata_for_each_link(tlink, ap, EDGE)
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ata_for_each_dev(tdev, tlink, ALL)
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tdev->flags |= ATA_DFLAG_DETACH;
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}
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ata_port_schedule_eh(ap);
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}
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/**
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* ata_acpi_handle_hotplug - ACPI event handler backend
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* @ap: ATA port ACPI event occurred
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* @dev: ATA device ACPI event occurred (can be NULL)
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* @event: ACPI event which occurred
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*
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* All ACPI bay / device realted events end up in this function. If
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* the event is port-wide @dev is NULL. If the event is specific to a
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* device, @dev points to it.
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*
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* Hotplug (as opposed to unplug) notification is always handled as
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* port-wide while unplug only kills the target device on device-wide
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* event.
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*
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* LOCKING:
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* ACPI notify handler context. May sleep.
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*/
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static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
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u32 event)
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{
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struct ata_eh_info *ehi = &ap->link.eh_info;
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int wait = 0;
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unsigned long flags;
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spin_lock_irqsave(ap->lock, flags);
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/*
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* When dock driver calls into the routine, it will always use
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* ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and
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* ACPI_NOTIFY_EJECT_REQUEST for remove
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*/
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switch (event) {
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case ACPI_NOTIFY_BUS_CHECK:
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case ACPI_NOTIFY_DEVICE_CHECK:
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ata_ehi_push_desc(ehi, "ACPI event");
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ata_ehi_hotplugged(ehi);
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ata_port_freeze(ap);
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break;
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case ACPI_NOTIFY_EJECT_REQUEST:
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ata_ehi_push_desc(ehi, "ACPI event");
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ata_acpi_detach_device(ap, dev);
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wait = 1;
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break;
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}
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spin_unlock_irqrestore(ap->lock, flags);
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if (wait)
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ata_port_wait_eh(ap);
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}
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static int ata_acpi_dev_notify_dock(struct acpi_device *adev, u32 event)
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{
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struct ata_device *dev = ata_hotplug_data(adev->hp).dev;
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ata_acpi_handle_hotplug(dev->link->ap, dev, event);
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return 0;
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}
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static int ata_acpi_ap_notify_dock(struct acpi_device *adev, u32 event)
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{
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ata_acpi_handle_hotplug(ata_hotplug_data(adev->hp).ap, NULL, event);
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return 0;
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}
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static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev,
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u32 event)
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{
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struct kobject *kobj = NULL;
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char event_string[20];
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char *envp[] = { event_string, NULL };
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if (dev) {
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if (dev->sdev)
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kobj = &dev->sdev->sdev_gendev.kobj;
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} else
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kobj = &ap->dev->kobj;
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if (kobj) {
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snprintf(event_string, 20, "BAY_EVENT=%d", event);
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kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
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}
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}
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static void ata_acpi_ap_uevent(struct acpi_device *adev, u32 event)
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{
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ata_acpi_uevent(ata_hotplug_data(adev->hp).ap, NULL, event);
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}
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static void ata_acpi_dev_uevent(struct acpi_device *adev, u32 event)
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{
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struct ata_device *dev = ata_hotplug_data(adev->hp).dev;
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ata_acpi_uevent(dev->link->ap, dev, event);
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}
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/* bind acpi handle to pata port */
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void ata_acpi_bind_port(struct ata_port *ap)
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{
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struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev);
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struct acpi_device *adev;
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struct ata_acpi_hotplug_context *context;
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if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA || !host_companion)
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return;
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acpi_preset_companion(&ap->tdev, host_companion, ap->port_no);
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if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
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ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
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adev = ACPI_COMPANION(&ap->tdev);
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if (!adev || adev->hp)
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return;
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context = kzalloc(sizeof(*context), GFP_KERNEL);
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if (!context)
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return;
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context->data.ap = ap;
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acpi_initialize_hp_context(adev, &context->hp, ata_acpi_ap_notify_dock,
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ata_acpi_ap_uevent);
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}
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void ata_acpi_bind_dev(struct ata_device *dev)
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{
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struct ata_port *ap = dev->link->ap;
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struct acpi_device *port_companion = ACPI_COMPANION(&ap->tdev);
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struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev);
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struct acpi_device *parent, *adev;
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struct ata_acpi_hotplug_context *context;
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u64 adr;
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/*
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* For both sata/pata devices, host companion device is required.
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* For pata device, port companion device is also required.
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*/
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if (libata_noacpi || !host_companion ||
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(!(ap->flags & ATA_FLAG_ACPI_SATA) && !port_companion))
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return;
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if (ap->flags & ATA_FLAG_ACPI_SATA) {
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if (!sata_pmp_attached(ap))
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adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
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else
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adr = SATA_ADR(ap->port_no, dev->link->pmp);
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parent = host_companion;
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} else {
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adr = dev->devno;
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parent = port_companion;
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}
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acpi_preset_companion(&dev->tdev, parent, adr);
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adev = ACPI_COMPANION(&dev->tdev);
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if (!adev || adev->hp)
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return;
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context = kzalloc(sizeof(*context), GFP_KERNEL);
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if (!context)
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return;
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context->data.dev = dev;
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acpi_initialize_hp_context(adev, &context->hp, ata_acpi_dev_notify_dock,
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ata_acpi_dev_uevent);
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}
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/**
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* ata_acpi_dissociate - dissociate ATA host from ACPI objects
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* @host: target ATA host
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*
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* This function is called during driver detach after the whole host
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* is shut down.
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*
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* LOCKING:
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* EH context.
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*/
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void ata_acpi_dissociate(struct ata_host *host)
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{
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int i;
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/* Restore initial _GTM values so that driver which attaches
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* afterward can use them too.
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*/
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for (i = 0; i < host->n_ports; i++) {
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struct ata_port *ap = host->ports[i];
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const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
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if (ACPI_HANDLE(&ap->tdev) && gtm)
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ata_acpi_stm(ap, gtm);
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}
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}
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/**
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* ata_acpi_gtm - execute _GTM
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* @ap: target ATA port
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* @gtm: out parameter for _GTM result
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*
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* Evaluate _GTM and store the result in @gtm.
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*
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* LOCKING:
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* EH context.
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*
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* RETURNS:
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* 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
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*/
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int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
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{
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struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
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union acpi_object *out_obj;
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acpi_status status;
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int rc = 0;
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acpi_handle handle = ACPI_HANDLE(&ap->tdev);
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if (!handle)
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return -EINVAL;
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status = acpi_evaluate_object(handle, "_GTM", NULL, &output);
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rc = -ENOENT;
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if (status == AE_NOT_FOUND)
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goto out_free;
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rc = -EINVAL;
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if (ACPI_FAILURE(status)) {
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ata_port_err(ap, "ACPI get timing mode failed (AE 0x%x)\n",
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status);
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goto out_free;
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}
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out_obj = output.pointer;
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if (out_obj->type != ACPI_TYPE_BUFFER) {
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ata_port_warn(ap, "_GTM returned unexpected object type 0x%x\n",
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out_obj->type);
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goto out_free;
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}
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if (out_obj->buffer.length != sizeof(struct ata_acpi_gtm)) {
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ata_port_err(ap, "_GTM returned invalid length %d\n",
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out_obj->buffer.length);
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goto out_free;
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}
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memcpy(gtm, out_obj->buffer.pointer, sizeof(struct ata_acpi_gtm));
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rc = 0;
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out_free:
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kfree(output.pointer);
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return rc;
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}
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EXPORT_SYMBOL_GPL(ata_acpi_gtm);
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/**
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* ata_acpi_stm - execute _STM
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* @ap: target ATA port
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* @stm: timing parameter to _STM
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*
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* Evaluate _STM with timing parameter @stm.
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*
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* LOCKING:
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* EH context.
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*
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* RETURNS:
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* 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
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*/
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int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
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{
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acpi_status status;
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struct ata_acpi_gtm stm_buf = *stm;
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struct acpi_object_list input;
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union acpi_object in_params[3];
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in_params[0].type = ACPI_TYPE_BUFFER;
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in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
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in_params[0].buffer.pointer = (u8 *)&stm_buf;
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/* Buffers for id may need byteswapping ? */
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in_params[1].type = ACPI_TYPE_BUFFER;
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in_params[1].buffer.length = 512;
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in_params[1].buffer.pointer = (u8 *)ap->link.device[0].id;
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in_params[2].type = ACPI_TYPE_BUFFER;
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in_params[2].buffer.length = 512;
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in_params[2].buffer.pointer = (u8 *)ap->link.device[1].id;
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input.count = 3;
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input.pointer = in_params;
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status = acpi_evaluate_object(ACPI_HANDLE(&ap->tdev), "_STM",
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&input, NULL);
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if (status == AE_NOT_FOUND)
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return -ENOENT;
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if (ACPI_FAILURE(status)) {
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ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n",
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status);
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return -EINVAL;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(ata_acpi_stm);
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/**
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* ata_dev_get_GTF - get the drive bootup default taskfile settings
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* @dev: target ATA device
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* @gtf: output parameter for buffer containing _GTF taskfile arrays
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*
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* This applies to both PATA and SATA drives.
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*
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* The _GTF method has no input parameters.
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* It returns a variable number of register set values (registers
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* hex 1F1..1F7, taskfiles).
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* The <variable number> is not known in advance, so have ACPI-CA
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* allocate the buffer as needed and return it, then free it later.
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*
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* LOCKING:
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* EH context.
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*
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* RETURNS:
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* Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
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* if _GTF is invalid.
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*/
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static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
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{
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acpi_status status;
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struct acpi_buffer output;
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union acpi_object *out_obj;
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int rc = 0;
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/* if _GTF is cached, use the cached value */
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if (dev->gtf_cache) {
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out_obj = dev->gtf_cache;
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goto done;
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}
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/* set up output buffer */
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output.length = ACPI_ALLOCATE_BUFFER;
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output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
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/* _GTF has no input parameters */
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status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL,
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&output);
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out_obj = dev->gtf_cache = output.pointer;
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if (ACPI_FAILURE(status)) {
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if (status != AE_NOT_FOUND) {
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ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n",
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status);
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rc = -EINVAL;
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}
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goto out_free;
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}
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if (!output.length || !output.pointer) {
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ata_dev_dbg(dev, "Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n",
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(unsigned long long)output.length,
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output.pointer);
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rc = -EINVAL;
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goto out_free;
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}
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if (out_obj->type != ACPI_TYPE_BUFFER) {
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ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n",
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out_obj->type);
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rc = -EINVAL;
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goto out_free;
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}
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if (out_obj->buffer.length % REGS_PER_GTF) {
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ata_dev_warn(dev, "unexpected _GTF length (%d)\n",
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out_obj->buffer.length);
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rc = -EINVAL;
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goto out_free;
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}
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done:
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rc = out_obj->buffer.length / REGS_PER_GTF;
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if (gtf) {
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*gtf = (void *)out_obj->buffer.pointer;
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ata_dev_dbg(dev, "returning gtf=%p, gtf_count=%d\n",
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*gtf, rc);
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}
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return rc;
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out_free:
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ata_acpi_clear_gtf(dev);
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return rc;
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}
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/**
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* ata_acpi_gtm_xfermask - determine xfermode from GTM parameter
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* @dev: target device
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* @gtm: GTM parameter to use
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*
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* Determine xfermask for @dev from @gtm.
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*
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* LOCKING:
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* None.
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*
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* RETURNS:
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* Determined xfermask.
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*/
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unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
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const struct ata_acpi_gtm *gtm)
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{
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unsigned int xfer_mask = 0;
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unsigned int type;
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int unit;
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u8 mode;
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/* we always use the 0 slot for crap hardware */
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unit = dev->devno;
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if (!(gtm->flags & 0x10))
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unit = 0;
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/* PIO */
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mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio);
|
|
xfer_mask |= ata_xfer_mode2mask(mode);
|
|
|
|
/* See if we have MWDMA or UDMA data. We don't bother with
|
|
* MWDMA if UDMA is available as this means the BIOS set UDMA
|
|
* and our error changedown if it works is UDMA to PIO anyway.
|
|
*/
|
|
if (!(gtm->flags & (1 << (2 * unit))))
|
|
type = ATA_SHIFT_MWDMA;
|
|
else
|
|
type = ATA_SHIFT_UDMA;
|
|
|
|
mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma);
|
|
xfer_mask |= ata_xfer_mode2mask(mode);
|
|
|
|
return xfer_mask;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
|
|
|
|
/**
|
|
* ata_acpi_cbl_80wire - Check for 80 wire cable
|
|
* @ap: Port to check
|
|
* @gtm: GTM data to use
|
|
*
|
|
* Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
|
|
*/
|
|
int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
|
|
{
|
|
struct ata_device *dev;
|
|
|
|
ata_for_each_dev(dev, &ap->link, ENABLED) {
|
|
unsigned int xfer_mask, udma_mask;
|
|
|
|
xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
|
|
ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
|
|
|
|
if (udma_mask & ~ATA_UDMA_MASK_40C)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
|
|
|
|
static void ata_acpi_gtf_to_tf(struct ata_device *dev,
|
|
const struct ata_acpi_gtf *gtf,
|
|
struct ata_taskfile *tf)
|
|
{
|
|
ata_tf_init(dev, tf);
|
|
|
|
tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
|
|
tf->protocol = ATA_PROT_NODATA;
|
|
tf->error = gtf->tf[0]; /* 0x1f1 */
|
|
tf->nsect = gtf->tf[1]; /* 0x1f2 */
|
|
tf->lbal = gtf->tf[2]; /* 0x1f3 */
|
|
tf->lbam = gtf->tf[3]; /* 0x1f4 */
|
|
tf->lbah = gtf->tf[4]; /* 0x1f5 */
|
|
tf->device = gtf->tf[5]; /* 0x1f6 */
|
|
tf->status = gtf->tf[6]; /* 0x1f7 */
|
|
}
|
|
|
|
static int ata_acpi_filter_tf(struct ata_device *dev,
|
|
const struct ata_taskfile *tf,
|
|
const struct ata_taskfile *ptf)
|
|
{
|
|
if (dev->gtf_filter & ATA_ACPI_FILTER_SETXFER) {
|
|
/* libata doesn't use ACPI to configure transfer mode.
|
|
* It will only confuse device configuration. Skip.
|
|
*/
|
|
if (tf->command == ATA_CMD_SET_FEATURES &&
|
|
tf->feature == SETFEATURES_XFER)
|
|
return 1;
|
|
}
|
|
|
|
if (dev->gtf_filter & ATA_ACPI_FILTER_LOCK) {
|
|
/* BIOS writers, sorry but we don't wanna lock
|
|
* features unless the user explicitly said so.
|
|
*/
|
|
|
|
/* DEVICE CONFIGURATION FREEZE LOCK */
|
|
if (tf->command == ATA_CMD_CONF_OVERLAY &&
|
|
tf->feature == ATA_DCO_FREEZE_LOCK)
|
|
return 1;
|
|
|
|
/* SECURITY FREEZE LOCK */
|
|
if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
|
|
return 1;
|
|
|
|
/* SET MAX LOCK and SET MAX FREEZE LOCK */
|
|
if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
|
|
tf->command == ATA_CMD_SET_MAX &&
|
|
(tf->feature == ATA_SET_MAX_LOCK ||
|
|
tf->feature == ATA_SET_MAX_FREEZE_LOCK))
|
|
return 1;
|
|
}
|
|
|
|
if (tf->command == ATA_CMD_SET_FEATURES &&
|
|
tf->feature == SETFEATURES_SATA_ENABLE) {
|
|
/* inhibit enabling DIPM */
|
|
if (dev->gtf_filter & ATA_ACPI_FILTER_DIPM &&
|
|
tf->nsect == SATA_DIPM)
|
|
return 1;
|
|
|
|
/* inhibit FPDMA non-zero offset */
|
|
if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_OFFSET &&
|
|
(tf->nsect == SATA_FPDMA_OFFSET ||
|
|
tf->nsect == SATA_FPDMA_IN_ORDER))
|
|
return 1;
|
|
|
|
/* inhibit FPDMA auto activation */
|
|
if (dev->gtf_filter & ATA_ACPI_FILTER_FPDMA_AA &&
|
|
tf->nsect == SATA_FPDMA_AA)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_acpi_run_tf - send taskfile registers to host controller
|
|
* @dev: target ATA device
|
|
* @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
|
|
* @prev_gtf: previous command
|
|
*
|
|
* Outputs ATA taskfile to standard ATA host controller.
|
|
* Writes the control, feature, nsect, lbal, lbam, and lbah registers.
|
|
* Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
|
|
* hob_lbal, hob_lbam, and hob_lbah.
|
|
*
|
|
* This function waits for idle (!BUSY and !DRQ) after writing
|
|
* registers. If the control register has a new value, this
|
|
* function also waits for idle after writing control and before
|
|
* writing the remaining registers.
|
|
*
|
|
* LOCKING:
|
|
* EH context.
|
|
*
|
|
* RETURNS:
|
|
* 1 if command is executed successfully. 0 if ignored, rejected or
|
|
* filtered out, -errno on other errors.
|
|
*/
|
|
static int ata_acpi_run_tf(struct ata_device *dev,
|
|
const struct ata_acpi_gtf *gtf,
|
|
const struct ata_acpi_gtf *prev_gtf)
|
|
{
|
|
struct ata_taskfile *pptf = NULL;
|
|
struct ata_taskfile tf, ptf, rtf;
|
|
unsigned int err_mask;
|
|
const char *descr;
|
|
int rc;
|
|
|
|
if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
|
|
&& (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
|
|
&& (gtf->tf[6] == 0))
|
|
return 0;
|
|
|
|
ata_acpi_gtf_to_tf(dev, gtf, &tf);
|
|
if (prev_gtf) {
|
|
ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
|
|
pptf = &ptf;
|
|
}
|
|
|
|
descr = ata_get_cmd_name(tf.command);
|
|
|
|
if (!ata_acpi_filter_tf(dev, &tf, pptf)) {
|
|
rtf = tf;
|
|
err_mask = ata_exec_internal(dev, &rtf, NULL,
|
|
DMA_NONE, NULL, 0, 0);
|
|
|
|
switch (err_mask) {
|
|
case 0:
|
|
ata_dev_dbg(dev,
|
|
"ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x"
|
|
"(%s) succeeded\n",
|
|
tf.command, tf.feature, tf.nsect, tf.lbal,
|
|
tf.lbam, tf.lbah, tf.device, descr);
|
|
rc = 1;
|
|
break;
|
|
|
|
case AC_ERR_DEV:
|
|
ata_dev_info(dev,
|
|
"ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x"
|
|
"(%s) rejected by device (Stat=0x%02x Err=0x%02x)",
|
|
tf.command, tf.feature, tf.nsect, tf.lbal,
|
|
tf.lbam, tf.lbah, tf.device, descr,
|
|
rtf.status, rtf.error);
|
|
rc = 0;
|
|
break;
|
|
|
|
default:
|
|
ata_dev_err(dev,
|
|
"ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x"
|
|
"(%s) failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
|
|
tf.command, tf.feature, tf.nsect, tf.lbal,
|
|
tf.lbam, tf.lbah, tf.device, descr,
|
|
err_mask, rtf.status, rtf.error);
|
|
rc = -EIO;
|
|
break;
|
|
}
|
|
} else {
|
|
ata_dev_info(dev,
|
|
"ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x"
|
|
"(%s) filtered out\n",
|
|
tf.command, tf.feature, tf.nsect, tf.lbal,
|
|
tf.lbam, tf.lbah, tf.device, descr);
|
|
rc = 0;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ata_acpi_exec_tfs - get then write drive taskfile settings
|
|
* @dev: target ATA device
|
|
* @nr_executed: out parameter for the number of executed commands
|
|
*
|
|
* Evaluate _GTF and execute returned taskfiles.
|
|
*
|
|
* LOCKING:
|
|
* EH context.
|
|
*
|
|
* RETURNS:
|
|
* Number of executed taskfiles on success, 0 if _GTF doesn't exist.
|
|
* -errno on other errors.
|
|
*/
|
|
static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
|
|
{
|
|
struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
|
|
int gtf_count, i, rc;
|
|
|
|
/* get taskfiles */
|
|
rc = ata_dev_get_GTF(dev, >f);
|
|
if (rc < 0)
|
|
return rc;
|
|
gtf_count = rc;
|
|
|
|
/* execute them */
|
|
for (i = 0; i < gtf_count; i++, gtf++) {
|
|
rc = ata_acpi_run_tf(dev, gtf, pgtf);
|
|
if (rc < 0)
|
|
break;
|
|
if (rc) {
|
|
(*nr_executed)++;
|
|
pgtf = gtf;
|
|
}
|
|
}
|
|
|
|
ata_acpi_clear_gtf(dev);
|
|
|
|
if (rc < 0)
|
|
return rc;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_acpi_push_id - send Identify data to drive
|
|
* @dev: target ATA device
|
|
*
|
|
* _SDD ACPI object: for SATA mode only
|
|
* Must be after Identify (Packet) Device -- uses its data
|
|
* ATM this function never returns a failure. It is an optional
|
|
* method and if it fails for whatever reason, we should still
|
|
* just keep going.
|
|
*
|
|
* LOCKING:
|
|
* EH context.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success, -ENOENT if _SDD doesn't exist, -errno on failure.
|
|
*/
|
|
static int ata_acpi_push_id(struct ata_device *dev)
|
|
{
|
|
struct ata_port *ap = dev->link->ap;
|
|
acpi_status status;
|
|
struct acpi_object_list input;
|
|
union acpi_object in_params[1];
|
|
|
|
ata_dev_dbg(dev, "%s: ix = %d, port#: %d\n",
|
|
__func__, dev->devno, ap->port_no);
|
|
|
|
/* Give the drive Identify data to the drive via the _SDD method */
|
|
/* _SDD: set up input parameters */
|
|
input.count = 1;
|
|
input.pointer = in_params;
|
|
in_params[0].type = ACPI_TYPE_BUFFER;
|
|
in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
|
|
in_params[0].buffer.pointer = (u8 *)dev->id;
|
|
/* Output buffer: _SDD has no output */
|
|
|
|
/* It's OK for _SDD to be missing too. */
|
|
swap_buf_le16(dev->id, ATA_ID_WORDS);
|
|
status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_SDD", &input,
|
|
NULL);
|
|
swap_buf_le16(dev->id, ATA_ID_WORDS);
|
|
|
|
if (status == AE_NOT_FOUND)
|
|
return -ENOENT;
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ata_dev_warn(dev, "ACPI _SDD failed (AE 0x%x)\n", status);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_acpi_on_resume - ATA ACPI hook called on resume
|
|
* @ap: target ATA port
|
|
*
|
|
* This function is called when @ap is resumed - right after port
|
|
* itself is resumed but before any EH action is taken.
|
|
*
|
|
* LOCKING:
|
|
* EH context.
|
|
*/
|
|
void ata_acpi_on_resume(struct ata_port *ap)
|
|
{
|
|
const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
|
|
struct ata_device *dev;
|
|
|
|
if (ACPI_HANDLE(&ap->tdev) && gtm) {
|
|
/* _GTM valid */
|
|
|
|
/* restore timing parameters */
|
|
ata_acpi_stm(ap, gtm);
|
|
|
|
/* _GTF should immediately follow _STM so that it can
|
|
* use values set by _STM. Cache _GTF result and
|
|
* schedule _GTF.
|
|
*/
|
|
ata_for_each_dev(dev, &ap->link, ALL) {
|
|
ata_acpi_clear_gtf(dev);
|
|
if (ata_dev_enabled(dev) &&
|
|
ata_dev_acpi_handle(dev) &&
|
|
ata_dev_get_GTF(dev, NULL) >= 0)
|
|
dev->flags |= ATA_DFLAG_ACPI_PENDING;
|
|
}
|
|
} else {
|
|
/* SATA _GTF needs to be evaulated after _SDD and
|
|
* there's no reason to evaluate IDE _GTF early
|
|
* without _STM. Clear cache and schedule _GTF.
|
|
*/
|
|
ata_for_each_dev(dev, &ap->link, ALL) {
|
|
ata_acpi_clear_gtf(dev);
|
|
if (ata_dev_enabled(dev))
|
|
dev->flags |= ATA_DFLAG_ACPI_PENDING;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int ata_acpi_choose_suspend_state(struct ata_device *dev, bool runtime)
|
|
{
|
|
int d_max_in = ACPI_STATE_D3_COLD;
|
|
if (!runtime)
|
|
goto out;
|
|
|
|
/*
|
|
* For ATAPI, runtime D3 cold is only allowed
|
|
* for ZPODD in zero power ready state
|
|
*/
|
|
if (dev->class == ATA_DEV_ATAPI &&
|
|
!(zpodd_dev_enabled(dev) && zpodd_zpready(dev)))
|
|
d_max_in = ACPI_STATE_D3_HOT;
|
|
|
|
out:
|
|
return acpi_pm_device_sleep_state(&dev->tdev, NULL, d_max_in);
|
|
}
|
|
|
|
static void sata_acpi_set_state(struct ata_port *ap, pm_message_t state)
|
|
{
|
|
bool runtime = PMSG_IS_AUTO(state);
|
|
struct ata_device *dev;
|
|
acpi_handle handle;
|
|
int acpi_state;
|
|
|
|
ata_for_each_dev(dev, &ap->link, ENABLED) {
|
|
handle = ata_dev_acpi_handle(dev);
|
|
if (!handle)
|
|
continue;
|
|
|
|
if (!(state.event & PM_EVENT_RESUME)) {
|
|
acpi_state = ata_acpi_choose_suspend_state(dev, runtime);
|
|
if (acpi_state == ACPI_STATE_D0)
|
|
continue;
|
|
if (runtime && zpodd_dev_enabled(dev) &&
|
|
acpi_state == ACPI_STATE_D3_COLD)
|
|
zpodd_enable_run_wake(dev);
|
|
acpi_bus_set_power(handle, acpi_state);
|
|
} else {
|
|
if (runtime && zpodd_dev_enabled(dev))
|
|
zpodd_disable_run_wake(dev);
|
|
acpi_bus_set_power(handle, ACPI_STATE_D0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* ACPI spec requires _PS0 when IDE power on and _PS3 when power off */
|
|
static void pata_acpi_set_state(struct ata_port *ap, pm_message_t state)
|
|
{
|
|
struct ata_device *dev;
|
|
acpi_handle port_handle;
|
|
|
|
port_handle = ACPI_HANDLE(&ap->tdev);
|
|
if (!port_handle)
|
|
return;
|
|
|
|
/* channel first and then drives for power on and vica versa
|
|
for power off */
|
|
if (state.event & PM_EVENT_RESUME)
|
|
acpi_bus_set_power(port_handle, ACPI_STATE_D0);
|
|
|
|
ata_for_each_dev(dev, &ap->link, ENABLED) {
|
|
acpi_handle dev_handle = ata_dev_acpi_handle(dev);
|
|
if (!dev_handle)
|
|
continue;
|
|
|
|
acpi_bus_set_power(dev_handle, state.event & PM_EVENT_RESUME ?
|
|
ACPI_STATE_D0 : ACPI_STATE_D3_COLD);
|
|
}
|
|
|
|
if (!(state.event & PM_EVENT_RESUME))
|
|
acpi_bus_set_power(port_handle, ACPI_STATE_D3_COLD);
|
|
}
|
|
|
|
/**
|
|
* ata_acpi_set_state - set the port power state
|
|
* @ap: target ATA port
|
|
* @state: state, on/off
|
|
*
|
|
* This function sets a proper ACPI D state for the device on
|
|
* system and runtime PM operations.
|
|
*/
|
|
void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
|
|
{
|
|
if (ap->flags & ATA_FLAG_ACPI_SATA)
|
|
sata_acpi_set_state(ap, state);
|
|
else
|
|
pata_acpi_set_state(ap, state);
|
|
}
|
|
|
|
/**
|
|
* ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration
|
|
* @dev: target ATA device
|
|
*
|
|
* This function is called when @dev is about to be configured.
|
|
* IDENTIFY data might have been modified after this hook is run.
|
|
*
|
|
* LOCKING:
|
|
* EH context.
|
|
*
|
|
* RETURNS:
|
|
* Positive number if IDENTIFY data needs to be refreshed, 0 if not,
|
|
* -errno on failure.
|
|
*/
|
|
int ata_acpi_on_devcfg(struct ata_device *dev)
|
|
{
|
|
struct ata_port *ap = dev->link->ap;
|
|
struct ata_eh_context *ehc = &ap->link.eh_context;
|
|
int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
|
|
int nr_executed = 0;
|
|
int rc;
|
|
|
|
if (!ata_dev_acpi_handle(dev))
|
|
return 0;
|
|
|
|
/* do we need to do _GTF? */
|
|
if (!(dev->flags & ATA_DFLAG_ACPI_PENDING) &&
|
|
!(acpi_sata && (ehc->i.flags & ATA_EHI_DID_HARDRESET)))
|
|
return 0;
|
|
|
|
/* do _SDD if SATA */
|
|
if (acpi_sata) {
|
|
rc = ata_acpi_push_id(dev);
|
|
if (rc && rc != -ENOENT)
|
|
goto acpi_err;
|
|
}
|
|
|
|
/* do _GTF */
|
|
rc = ata_acpi_exec_tfs(dev, &nr_executed);
|
|
if (rc)
|
|
goto acpi_err;
|
|
|
|
dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
|
|
|
|
/* refresh IDENTIFY page if any _GTF command has been executed */
|
|
if (nr_executed) {
|
|
rc = ata_dev_reread_id(dev, 0);
|
|
if (rc < 0) {
|
|
ata_dev_err(dev,
|
|
"failed to IDENTIFY after ACPI commands\n");
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
acpi_err:
|
|
/* ignore evaluation failure if we can continue safely */
|
|
if (rc == -EINVAL && !nr_executed && !ata_port_is_frozen(ap))
|
|
return 0;
|
|
|
|
/* fail and let EH retry once more for unknown IO errors */
|
|
if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
|
|
dev->flags |= ATA_DFLAG_ACPI_FAILED;
|
|
return rc;
|
|
}
|
|
|
|
dev->flags |= ATA_DFLAG_ACPI_DISABLED;
|
|
ata_dev_warn(dev, "ACPI: failed the second time, disabled\n");
|
|
|
|
/* We can safely continue if no _GTF command has been executed
|
|
* and port is not frozen.
|
|
*/
|
|
if (!nr_executed && !ata_port_is_frozen(ap))
|
|
return 0;
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
|
|
* @dev: target ATA device
|
|
*
|
|
* This function is called when @dev is about to be disabled.
|
|
*
|
|
* LOCKING:
|
|
* EH context.
|
|
*/
|
|
void ata_acpi_on_disable(struct ata_device *dev)
|
|
{
|
|
ata_acpi_clear_gtf(dev);
|
|
}
|