c05e6ff035
_GTM fetches currently configured transfer mode while _STM configures controller according to _GTM parameter and prepares transfer mode configuration TFs for _GTF. In many cases _GTM and _STM implementations are quite brittle and can't cope with configuration changed by libata. libata does not depend on ATA ACPI to configure devices. The only reason libata performs _GTM and _STM are to make _GTF evaluation succeed and libata also doesn't care about how _GTF TFs configure transfer mode. It overrides that configuration anyway, so from libata's POV, it doesn't matter what value is feeded to _STM as long as evaluation succeeds for _STM and following _GTF. This patch adds dev->__acpi_init_gtm and store initial _GTM values on host initialization before modified by reset and mode configuration. If the field is valid, ata_acpi_init_gtm() returns pointer to the saved _GTM structure; otherwise, NULL. This saved value is used for _STM during resume and peek at BIOS/firmware programmed initial timing for later use. The accessor is there to make building w/o ACPI easy as dev->__acpi_init doesn't exist if ACPI is not enabled. On driver detach, the initial BIOS configuration is restored by executing _STM with the initial _GTM values such that the next driver can also use the initial BIOS configured values. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
739 lines
18 KiB
C
739 lines
18 KiB
C
/*
|
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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/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 <scsi/scsi_device.h>
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#include "libata.h"
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#include <acpi/acpi_bus.h>
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#include <acpi/acnames.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acparser.h>
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#include <acpi/acexcep.h>
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#include <acpi/acmacros.h>
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#include <acpi/actypes.h>
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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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/*
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* Helper - belongs in the PCI layer somewhere eventually
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*/
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static int is_pci_dev(struct device *dev)
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{
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return (dev->bus == &pci_bus_type);
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}
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/**
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* ata_acpi_associate_sata_port - associate SATA port with ACPI objects
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* @ap: target SATA port
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*
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* Look up ACPI objects associated with @ap and initialize acpi_handle
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* fields of @ap, the port and devices accordingly.
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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, -errno on failure.
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*/
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void ata_acpi_associate_sata_port(struct ata_port *ap)
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{
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WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA));
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if (!ap->nr_pmp_links) {
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acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
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ap->link.device->acpi_handle =
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acpi_get_child(ap->host->acpi_handle, adr);
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} else {
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struct ata_link *link;
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ap->link.device->acpi_handle = NULL;
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ata_port_for_each_link(link, ap) {
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acpi_integer adr = SATA_ADR(ap->port_no, link->pmp);
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link->device->acpi_handle =
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acpi_get_child(ap->host->acpi_handle, adr);
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}
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}
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}
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static void ata_acpi_associate_ide_port(struct ata_port *ap)
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{
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int max_devices, i;
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ap->acpi_handle = acpi_get_child(ap->host->acpi_handle, ap->port_no);
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if (!ap->acpi_handle)
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return;
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max_devices = 1;
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if (ap->flags & ATA_FLAG_SLAVE_POSS)
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max_devices++;
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for (i = 0; i < max_devices; i++) {
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struct ata_device *dev = &ap->link.device[i];
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dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
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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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static void ata_acpi_handle_hotplug(struct ata_port *ap, struct kobject *kobj,
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u32 event)
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{
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char event_string[12];
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char *envp[] = { event_string, NULL };
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struct ata_eh_info *ehi = &ap->link.eh_info;
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if (event == 0 || event == 1) {
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unsigned long flags;
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spin_lock_irqsave(ap->lock, flags);
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ata_ehi_clear_desc(ehi);
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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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spin_unlock_irqrestore(ap->lock, flags);
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}
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if (kobj) {
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sprintf(event_string, "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_dev_notify(acpi_handle handle, u32 event, void *data)
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{
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struct ata_device *dev = data;
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struct kobject *kobj = NULL;
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if (dev->sdev)
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kobj = &dev->sdev->sdev_gendev.kobj;
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ata_acpi_handle_hotplug(dev->link->ap, kobj, event);
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}
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static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data)
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{
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struct ata_port *ap = data;
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ata_acpi_handle_hotplug(ap, &ap->dev->kobj, event);
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}
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/**
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* ata_acpi_associate - associate ATA host with ACPI objects
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* @host: target ATA host
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*
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* Look up ACPI objects associated with @host and initialize
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* acpi_handle fields of @host, its ports and devices accordingly.
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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, -errno on failure.
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*/
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void ata_acpi_associate(struct ata_host *host)
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{
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int i, j;
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if (!is_pci_dev(host->dev) || libata_noacpi)
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return;
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host->acpi_handle = DEVICE_ACPI_HANDLE(host->dev);
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if (!host->acpi_handle)
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return;
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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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if (host->ports[0]->flags & ATA_FLAG_ACPI_SATA)
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ata_acpi_associate_sata_port(ap);
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else
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ata_acpi_associate_ide_port(ap);
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if (ap->acpi_handle)
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acpi_install_notify_handler (ap->acpi_handle,
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ACPI_SYSTEM_NOTIFY,
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ata_acpi_ap_notify,
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ap);
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for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
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struct ata_device *dev = &ap->link.device[j];
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if (dev->acpi_handle)
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acpi_install_notify_handler (dev->acpi_handle,
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ACPI_SYSTEM_NOTIFY,
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ata_acpi_dev_notify,
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dev);
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}
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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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/* 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 (ap->acpi_handle && 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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status = acpi_evaluate_object(ap->acpi_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_printk(ap, KERN_ERR,
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"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_printk(ap, KERN_WARNING,
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"_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_printk(ap, KERN_ERR,
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"_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(ap->acpi_handle, "_STM", &input, NULL);
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|
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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_printk(ap, KERN_ERR,
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"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
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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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* @ptr_to_free: pointer which should be freed
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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:
|
|
* 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 or doesn't
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* contain valid data.
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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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void **ptr_to_free)
|
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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;
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union acpi_object *out_obj;
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int rc = 0;
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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))
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ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
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__FUNCTION__, ap->port_no);
|
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|
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/* _GTF has no input parameters */
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status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
|
|
|
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if (ACPI_FAILURE(status)) {
|
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if (status != AE_NOT_FOUND) {
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ata_dev_printk(dev, KERN_WARNING,
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"_GTF evaluation failed (AE 0x%x)\n",
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status);
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}
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goto out_free;
|
|
}
|
|
|
|
if (!output.length || !output.pointer) {
|
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if (ata_msg_probe(ap))
|
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ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
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"length or ptr is NULL (0x%llx, 0x%p)\n",
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__FUNCTION__,
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(unsigned long long)output.length,
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output.pointer);
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goto out_free;
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|
}
|
|
|
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out_obj = output.pointer;
|
|
if (out_obj->type != ACPI_TYPE_BUFFER) {
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ata_dev_printk(dev, KERN_WARNING,
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"_GTF unexpected object type 0x%x\n",
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out_obj->type);
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|
goto out_free;
|
|
}
|
|
|
|
if (out_obj->buffer.length % REGS_PER_GTF) {
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ata_dev_printk(dev, KERN_WARNING,
|
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"unexpected _GTF length (%d)\n",
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out_obj->buffer.length);
|
|
goto out_free;
|
|
}
|
|
|
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*ptr_to_free = out_obj;
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*gtf = (void *)out_obj->buffer.pointer;
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rc = out_obj->buffer.length / REGS_PER_GTF;
|
|
|
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if (ata_msg_probe(ap))
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ata_dev_printk(dev, KERN_DEBUG, "%s: returning "
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"gtf=%p, gtf_count=%d, ptr_to_free=%p\n",
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__FUNCTION__, *gtf, rc, *ptr_to_free);
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return rc;
|
|
|
|
out_free:
|
|
kfree(output.pointer);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ata_acpi_cbl_80wire - Check for 80 wire cable
|
|
* @ap: Port to check
|
|
*
|
|
* Return 1 if the ACPI mode data for this port indicates the BIOS selected
|
|
* an 80wire mode.
|
|
*/
|
|
|
|
int ata_acpi_cbl_80wire(struct ata_port *ap)
|
|
{
|
|
const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
|
|
int valid = 0;
|
|
|
|
if (!gtm)
|
|
return 0;
|
|
|
|
/* Split timing, DMA enabled */
|
|
if ((gtm->flags & 0x11) == 0x11 && gtm->drive[0].dma < 55)
|
|
valid |= 1;
|
|
if ((gtm->flags & 0x14) == 0x14 && gtm->drive[1].dma < 55)
|
|
valid |= 2;
|
|
/* Shared timing, DMA enabled */
|
|
if ((gtm->flags & 0x11) == 0x01 && gtm->drive[0].dma < 55)
|
|
valid |= 1;
|
|
if ((gtm->flags & 0x14) == 0x04 && gtm->drive[0].dma < 55)
|
|
valid |= 2;
|
|
|
|
/* Drive check */
|
|
if ((valid & 1) && ata_dev_enabled(&ap->link.device[0]))
|
|
return 1;
|
|
if ((valid & 2) && ata_dev_enabled(&ap->link.device[1]))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
|
|
|
|
/**
|
|
* taskfile_load_raw - 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 using MMIO
|
|
* or PIO as indicated by the ATA_FLAG_MMIO flag.
|
|
* 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:
|
|
* 0 on success, -errno on failure.
|
|
*/
|
|
static int taskfile_load_raw(struct ata_device *dev,
|
|
const struct ata_acpi_gtf *gtf)
|
|
{
|
|
struct ata_port *ap = dev->link->ap;
|
|
struct ata_taskfile tf, rtf;
|
|
unsigned int err_mask;
|
|
|
|
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_tf_init(dev, &tf);
|
|
|
|
/* convert gtf to tf */
|
|
tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */
|
|
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 */
|
|
|
|
if (ata_msg_probe(ap))
|
|
ata_dev_printk(dev, KERN_DEBUG, "executing ACPI cmd "
|
|
"%02x/%02x:%02x:%02x:%02x:%02x:%02x\n",
|
|
tf.command, tf.feature, tf.nsect,
|
|
tf.lbal, tf.lbam, tf.lbah, tf.device);
|
|
|
|
rtf = tf;
|
|
err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0, 0);
|
|
if (err_mask) {
|
|
ata_dev_printk(dev, KERN_ERR,
|
|
"ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed "
|
|
"(Emask=0x%x Stat=0x%02x Err=0x%02x)\n",
|
|
tf.command, tf.feature, tf.nsect, tf.lbal, tf.lbam,
|
|
tf.lbah, tf.device, err_mask, rtf.command, rtf.feature);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_acpi_exec_tfs - get then write drive taskfile settings
|
|
* @dev: target ATA device
|
|
*
|
|
* Evaluate _GTF and excute returned taskfiles.
|
|
*
|
|
* LOCKING:
|
|
* EH context.
|
|
*
|
|
* RETURNS:
|
|
* Number of executed taskfiles on success, 0 if _GTF doesn't exist or
|
|
* doesn't contain valid data. -errno on other errors.
|
|
*/
|
|
static int ata_acpi_exec_tfs(struct ata_device *dev)
|
|
{
|
|
struct ata_acpi_gtf *gtf = NULL;
|
|
void *ptr_to_free = NULL;
|
|
int gtf_count, i, rc;
|
|
|
|
/* get taskfiles */
|
|
gtf_count = ata_dev_get_GTF(dev, >f, &ptr_to_free);
|
|
|
|
/* execute them */
|
|
for (i = 0, rc = 0; i < gtf_count; i++) {
|
|
int tmp;
|
|
|
|
/* ACPI errors are eventually ignored. Run till the
|
|
* end even after errors.
|
|
*/
|
|
tmp = taskfile_load_raw(dev, gtf++);
|
|
if (!rc)
|
|
rc = tmp;
|
|
}
|
|
|
|
kfree(ptr_to_free);
|
|
|
|
if (rc == 0)
|
|
return gtf_count;
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* 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, -errno on failure.
|
|
*/
|
|
static int ata_acpi_push_id(struct ata_device *dev)
|
|
{
|
|
struct ata_port *ap = dev->link->ap;
|
|
int err;
|
|
acpi_status status;
|
|
struct acpi_object_list input;
|
|
union acpi_object in_params[1];
|
|
|
|
if (ata_msg_probe(ap))
|
|
ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n",
|
|
__FUNCTION__, 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(dev->acpi_handle, "_SDD", &input, NULL);
|
|
swap_buf_le16(dev->id, ATA_ID_WORDS);
|
|
|
|
err = ACPI_FAILURE(status) ? -EIO : 0;
|
|
if (err < 0)
|
|
ata_dev_printk(dev, KERN_WARNING,
|
|
"ACPI _SDD failed (AE 0x%x)\n", status);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/* restore timing parameters */
|
|
if (ap->acpi_handle && gtm)
|
|
ata_acpi_stm(ap, gtm);
|
|
|
|
/* schedule _GTF */
|
|
ata_link_for_each_dev(dev, &ap->link)
|
|
dev->flags |= ATA_DFLAG_ACPI_PENDING;
|
|
}
|
|
|
|
/**
|
|
* 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 rc;
|
|
|
|
if (!dev->acpi_handle)
|
|
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)
|
|
goto acpi_err;
|
|
}
|
|
|
|
/* do _GTF */
|
|
rc = ata_acpi_exec_tfs(dev);
|
|
if (rc < 0)
|
|
goto acpi_err;
|
|
|
|
dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
|
|
|
|
/* refresh IDENTIFY page if any _GTF command has been executed */
|
|
if (rc > 0) {
|
|
rc = ata_dev_reread_id(dev, 0);
|
|
if (rc < 0) {
|
|
ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY "
|
|
"after ACPI commands\n");
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
acpi_err:
|
|
/* let EH retry on the first failure, disable ACPI on the second */
|
|
if (dev->flags & ATA_DFLAG_ACPI_FAILED) {
|
|
ata_dev_printk(dev, KERN_WARNING, "ACPI on devcfg failed the "
|
|
"second time, disabling (errno=%d)\n", rc);
|
|
|
|
dev->acpi_handle = NULL;
|
|
|
|
/* if port is working, request IDENTIFY reload and continue */
|
|
if (!(ap->pflags & ATA_PFLAG_FROZEN))
|
|
rc = 1;
|
|
}
|
|
dev->flags |= ATA_DFLAG_ACPI_FAILED;
|
|
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)
|
|
{
|
|
}
|