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1055 lines
26 KiB
1055 lines
26 KiB
// 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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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/** |
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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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|
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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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|
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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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|
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ata_port_schedule_eh(ap); |
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} |
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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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|
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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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|
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spin_unlock_irqrestore(ap->lock, flags); |
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|
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if (wait) |
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ata_port_wait_eh(ap); |
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} |
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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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|
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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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|
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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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|
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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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|
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acpi_preset_companion(&ap->tdev, host_companion, ap->port_no); |
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|
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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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|
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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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|
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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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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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|
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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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|
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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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|
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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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/** |
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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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|
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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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/** |
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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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|
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if (!handle) |
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return -EINVAL; |
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|
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status = acpi_evaluate_object(handle, "_GTM", NULL, &output); |
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|
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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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|
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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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|
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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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|
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goto out_free; |
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} |
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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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|
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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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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; |
|
if (ACPI_FAILURE(status)) { |
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ata_port_err(ap, "ACPI set timing mode failed (status=0x%x)\n", |
|
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 |
|
* @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. |
|
* 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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struct ata_port *ap = dev->link->ap; |
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acpi_status status; |
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struct acpi_buffer output; |
|
union acpi_object *out_obj; |
|
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; |
|
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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if (ata_msg_probe(ap)) |
|
ata_dev_dbg(dev, "%s: ENTER: port#: %d\n", |
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__func__, ap->port_no); |
|
|
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/* _GTF has no input parameters */ |
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status = acpi_evaluate_object(ata_dev_acpi_handle(dev), "_GTF", NULL, |
|
&output); |
|
out_obj = dev->gtf_cache = output.pointer; |
|
|
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if (ACPI_FAILURE(status)) { |
|
if (status != AE_NOT_FOUND) { |
|
ata_dev_warn(dev, "_GTF evaluation failed (AE 0x%x)\n", |
|
status); |
|
rc = -EINVAL; |
|
} |
|
goto out_free; |
|
} |
|
|
|
if (!output.length || !output.pointer) { |
|
if (ata_msg_probe(ap)) |
|
ata_dev_dbg(dev, "%s: Run _GTF: length or ptr is NULL (0x%llx, 0x%p)\n", |
|
__func__, |
|
(unsigned long long)output.length, |
|
output.pointer); |
|
rc = -EINVAL; |
|
goto out_free; |
|
} |
|
|
|
if (out_obj->type != ACPI_TYPE_BUFFER) { |
|
ata_dev_warn(dev, "_GTF unexpected object type 0x%x\n", |
|
out_obj->type); |
|
rc = -EINVAL; |
|
goto out_free; |
|
} |
|
|
|
if (out_obj->buffer.length % REGS_PER_GTF) { |
|
ata_dev_warn(dev, "unexpected _GTF length (%d)\n", |
|
out_obj->buffer.length); |
|
rc = -EINVAL; |
|
goto out_free; |
|
} |
|
|
|
done: |
|
rc = out_obj->buffer.length / REGS_PER_GTF; |
|
if (gtf) { |
|
*gtf = (void *)out_obj->buffer.pointer; |
|
if (ata_msg_probe(ap)) |
|
ata_dev_dbg(dev, "%s: returning gtf=%p, gtf_count=%d\n", |
|
__func__, *gtf, rc); |
|
} |
|
return rc; |
|
|
|
out_free: |
|
ata_acpi_clear_gtf(dev); |
|
return rc; |
|
} |
|
|
|
/** |
|
* ata_acpi_gtm_xfermode - determine xfermode from GTM parameter |
|
* @dev: target device |
|
* @gtm: GTM parameter to use |
|
* |
|
* Determine xfermask for @dev from @gtm. |
|
* |
|
* LOCKING: |
|
* None. |
|
* |
|
* RETURNS: |
|
* Determined xfermask. |
|
*/ |
|
unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, |
|
const struct ata_acpi_gtm *gtm) |
|
{ |
|
unsigned long xfer_mask = 0; |
|
unsigned int type; |
|
int unit; |
|
u8 mode; |
|
|
|
/* we always use the 0 slot for crap hardware */ |
|
unit = dev->devno; |
|
if (!(gtm->flags & 0x10)) |
|
unit = 0; |
|
|
|
/* PIO */ |
|
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 long 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->feature = 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->command = 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) |
|
* |
|
* 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 *level; |
|
const char *descr; |
|
char msg[60]; |
|
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; |
|
} |
|
|
|
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: |
|
level = KERN_DEBUG; |
|
snprintf(msg, sizeof(msg), "succeeded"); |
|
rc = 1; |
|
break; |
|
|
|
case AC_ERR_DEV: |
|
level = KERN_INFO; |
|
snprintf(msg, sizeof(msg), |
|
"rejected by device (Stat=0x%02x Err=0x%02x)", |
|
rtf.command, rtf.feature); |
|
rc = 0; |
|
break; |
|
|
|
default: |
|
level = KERN_ERR; |
|
snprintf(msg, sizeof(msg), |
|
"failed (Emask=0x%x Stat=0x%02x Err=0x%02x)", |
|
err_mask, rtf.command, rtf.feature); |
|
rc = -EIO; |
|
break; |
|
} |
|
} else { |
|
level = KERN_INFO; |
|
snprintf(msg, sizeof(msg), "filtered out"); |
|
rc = 0; |
|
} |
|
descr = ata_get_cmd_descript(tf.command); |
|
|
|
ata_dev_printk(dev, level, |
|
"ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x (%s) %s\n", |
|
tf.command, tf.feature, tf.nsect, tf.lbal, |
|
tf.lbam, tf.lbah, tf.device, |
|
(descr ? descr : "unknown"), msg); |
|
|
|
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]; |
|
|
|
if (ata_msg_probe(ap)) |
|
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_suspend - ATA ACPI hook called on suspend |
|
* @ap: target ATA port |
|
* |
|
* This function is called when @ap is about to be suspended. All |
|
* devices are already put to sleep but the port_suspend() callback |
|
* hasn't been executed yet. Error return from this function aborts |
|
* suspend. |
|
* |
|
* LOCKING: |
|
* EH context. |
|
* |
|
* RETURNS: |
|
* 0 on success, -errno on failure. |
|
*/ |
|
int ata_acpi_on_suspend(struct ata_port *ap) |
|
{ |
|
/* nada */ |
|
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 && !(ap->pflags & ATA_PFLAG_FROZEN)) |
|
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 && !(ap->pflags & ATA_PFLAG_FROZEN)) |
|
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); |
|
}
|
|
|