2006-09-29 02:29:01 +08:00
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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/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 "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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2007-05-15 02:28:16 +08:00
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#define SATA_ADR(root,pmp) (((root) << 16) | (pmp))
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2006-09-29 02:29:01 +08:00
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#define REGS_PER_GTF 7
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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2007-03-09 07:13:50 +08:00
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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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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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static void ata_acpi_associate_sata_port(struct ata_port *ap)
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2006-09-29 02:29:01 +08:00
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{
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2007-05-15 02:28:16 +08:00
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acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT);
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ap->device->acpi_handle = acpi_get_child(ap->host->acpi_handle, adr);
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2006-09-29 02:29:01 +08:00
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}
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2007-05-15 02:28:16 +08:00
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static void ata_acpi_associate_ide_port(struct ata_port *ap)
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2006-09-29 02:29:01 +08:00
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{
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2007-05-15 02:28:16 +08:00
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int max_devices, i;
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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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for (i = 0; i < max_devices; i++) {
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struct ata_device *dev = &ap->device[i];
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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
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2006-09-29 02:29:01 +08:00
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}
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}
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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{
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2007-05-15 02:28:16 +08:00
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int i;
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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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if (!is_pci_dev(host->dev) || libata_noacpi)
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return;
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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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}
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}
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/**
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2007-05-15 02:28:16 +08:00
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* ata_dev_get_GTF - get the drive bootup default taskfile settings
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2007-05-05 22:50:38 +08:00
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* @dev: target ATA device
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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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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2007-05-15 02:28:16 +08:00
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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 or doesn't
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* contain valid data. -errno on other errors.
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2006-09-29 02:29:01 +08:00
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*/
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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{
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2007-05-05 22:50:38 +08:00
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struct ata_port *ap = dev->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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2007-05-15 02:28:16 +08:00
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int rc = 0;
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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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2007-05-15 02:28:16 +08:00
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if (!dev->acpi_handle)
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2007-05-15 02:28:16 +08:00
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goto out_free;
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2006-09-29 02:29:01 +08:00
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if (ata_msg_probe(ap))
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2007-05-05 22:50:38 +08:00
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ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
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2007-02-21 15:36:33 +08:00
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__FUNCTION__, ap->port_no);
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2006-09-29 02:29:01 +08:00
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2007-05-05 22:50:38 +08:00
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if (!ata_dev_enabled(dev) || (ap->flags & ATA_FLAG_DISABLED)) {
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2006-09-29 02:29:01 +08:00
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if (ata_msg_probe(ap))
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2007-05-05 22:50:38 +08:00
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ata_dev_printk(dev, KERN_DEBUG, "%s: ERR: "
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2006-09-29 02:29:01 +08:00
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"ata_dev_present: %d, PORT_DISABLED: %lu\n",
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2007-05-05 22:50:38 +08:00
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__FUNCTION__, ata_dev_enabled(dev),
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2006-09-29 02:29:01 +08:00
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ap->flags & ATA_FLAG_DISABLED);
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2007-05-15 02:28:16 +08:00
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goto out_free;
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2006-09-29 02:29:01 +08:00
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}
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/* _GTF has no input parameters */
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2007-05-15 02:28:16 +08:00
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status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
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2006-09-29 02:29:01 +08:00
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if (ACPI_FAILURE(status)) {
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2007-05-15 02:28:16 +08:00
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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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rc = -EIO;
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}
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goto out_free;
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2006-09-29 02:29:01 +08:00
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}
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if (!output.length || !output.pointer) {
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if (ata_msg_probe(ap))
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2007-05-05 22:50:38 +08:00
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ata_dev_printk(dev, KERN_DEBUG, "%s: Run _GTF: "
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2006-09-29 02:29:01 +08:00
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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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2007-05-15 02:28:16 +08:00
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goto out_free;
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2006-09-29 02:29:01 +08:00
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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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2007-05-15 02:28:16 +08:00
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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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2007-05-15 02:28:16 +08:00
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rc = -EINVAL;
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goto out_free;
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2006-09-29 02:29:01 +08:00
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}
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2007-05-15 02:28:16 +08:00
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if (out_obj->buffer.length % REGS_PER_GTF) {
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2007-05-15 02:28:16 +08:00
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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);
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2007-05-15 02:28:16 +08:00
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rc = -EINVAL;
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goto out_free;
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2006-09-29 02:29:01 +08:00
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}
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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if (ata_msg_probe(ap))
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2007-05-05 22:50:38 +08:00
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ata_dev_printk(dev, KERN_DEBUG, "%s: returning "
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2007-05-15 02:28:16 +08:00
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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;
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out_free:
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kfree(output.pointer);
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return rc;
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2006-09-29 02:29:01 +08:00
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}
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/**
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* taskfile_load_raw - send taskfile registers to host controller
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2007-05-05 22:50:38 +08:00
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* @dev: target ATA device
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2006-09-29 02:29:01 +08:00
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* @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
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*
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* Outputs ATA taskfile to standard ATA host controller using MMIO
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* or PIO as indicated by the ATA_FLAG_MMIO flag.
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* Writes the control, feature, nsect, lbal, lbam, and lbah registers.
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* Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
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* hob_lbal, hob_lbam, and hob_lbah.
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*
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* This function waits for idle (!BUSY and !DRQ) after writing
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* registers. If the control register has a new value, this
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* function also waits for idle after writing control and before
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* writing the remaining registers.
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*
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2007-05-15 02:28:16 +08:00
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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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2006-09-29 02:29:01 +08:00
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*/
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2007-05-15 02:28:16 +08:00
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static int taskfile_load_raw(struct ata_device *dev,
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const struct ata_acpi_gtf *gtf)
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2006-09-29 02:29:01 +08:00
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{
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2007-05-05 22:50:38 +08:00
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struct ata_port *ap = dev->ap;
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2007-05-15 02:28:16 +08:00
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struct ata_taskfile tf, rtf;
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unsigned int err_mask;
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2007-02-25 10:05:01 +08:00
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2007-05-15 02:28:16 +08:00
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if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
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&& (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
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&& (gtf->tf[6] == 0))
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return 0;
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2006-09-29 02:29:01 +08:00
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2007-05-05 22:50:38 +08:00
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ata_tf_init(dev, &tf);
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2007-02-25 10:05:01 +08:00
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/* convert gtf to tf */
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tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */
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2007-04-23 01:06:46 +08:00
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tf.protocol = ATA_PROT_NODATA;
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2007-05-15 02:28:16 +08:00
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tf.feature = gtf->tf[0]; /* 0x1f1 */
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tf.nsect = gtf->tf[1]; /* 0x1f2 */
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tf.lbal = gtf->tf[2]; /* 0x1f3 */
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tf.lbam = gtf->tf[3]; /* 0x1f4 */
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tf.lbah = gtf->tf[4]; /* 0x1f5 */
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tf.device = gtf->tf[5]; /* 0x1f6 */
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tf.command = gtf->tf[6]; /* 0x1f7 */
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if (ata_msg_probe(ap))
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ata_dev_printk(dev, KERN_DEBUG, "executing ACPI cmd "
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"%02x/%02x:%02x:%02x:%02x:%02x:%02x\n",
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tf.command, tf.feature, tf.nsect,
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tf.lbal, tf.lbam, tf.lbah, tf.device);
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rtf = tf;
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err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0);
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if (err_mask) {
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2007-05-05 22:50:38 +08:00
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ata_dev_printk(dev, KERN_ERR,
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2007-05-15 02:28:16 +08:00
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"ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed "
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"(Emask=0x%x Stat=0x%02x Err=0x%02x)\n",
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tf.command, tf.feature, tf.nsect, tf.lbal, tf.lbam,
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tf.lbah, tf.device, err_mask, rtf.command, rtf.feature);
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return -EIO;
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}
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return 0;
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2006-09-29 02:29:01 +08:00
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}
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/**
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2007-05-15 02:28:16 +08:00
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* ata_dev_set_taskfiles - write the drive taskfile settings from _GTF
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2007-05-05 22:50:38 +08:00
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* @dev: target ATA device
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2007-05-15 02:28:16 +08:00
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* @gtf: pointer to array of _GTF taskfiles to execute
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* @gtf_count: number of taskfiles
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2006-09-29 02:29:01 +08:00
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*
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* This applies to both PATA and SATA drives.
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*
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2007-05-15 02:28:16 +08:00
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* Execute taskfiles in @gtf.
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*
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* LOCKING:
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|
|
* EH context.
|
|
|
|
*
|
|
|
|
* RETURNS:
|
|
|
|
* 0 on success, -errno on failure.
|
2006-09-29 02:29:01 +08:00
|
|
|
*/
|
2007-05-15 02:28:16 +08:00
|
|
|
static int ata_dev_set_taskfiles(struct ata_device *dev,
|
|
|
|
struct ata_acpi_gtf *gtf, int gtf_count)
|
2006-09-29 02:29:01 +08:00
|
|
|
{
|
2007-05-05 22:50:38 +08:00
|
|
|
struct ata_port *ap = dev->ap;
|
|
|
|
int ix;
|
2006-09-29 02:29:01 +08:00
|
|
|
|
|
|
|
if (ata_msg_probe(ap))
|
2007-05-05 22:50:38 +08:00
|
|
|
ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER: port#: %d\n",
|
2007-02-21 15:36:33 +08:00
|
|
|
__FUNCTION__, ap->port_no);
|
2006-09-29 02:29:01 +08:00
|
|
|
|
2007-05-15 02:28:16 +08:00
|
|
|
if (!(ap->flags & ATA_FLAG_ACPI_SATA))
|
2006-09-29 02:29:01 +08:00
|
|
|
return 0;
|
|
|
|
|
2007-05-05 22:50:38 +08:00
|
|
|
if (!ata_dev_enabled(dev) || (ap->flags & ATA_FLAG_DISABLED))
|
2007-05-15 02:28:16 +08:00
|
|
|
return -ENODEV;
|
2006-09-29 02:29:01 +08:00
|
|
|
|
2007-05-15 02:28:16 +08:00
|
|
|
/* send all TaskFile registers (0x1f1-0x1f7) *in*that*order* */
|
|
|
|
for (ix = 0; ix < gtf_count; ix++)
|
|
|
|
taskfile_load_raw(dev, gtf++);
|
2006-09-29 02:29:01 +08:00
|
|
|
|
2007-05-15 02:28:16 +08:00
|
|
|
return 0;
|
2006-09-29 02:29:01 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ata_acpi_exec_tfs - get then write drive taskfile settings
|
|
|
|
* @ap: the ata_port for the drive
|
|
|
|
*
|
|
|
|
* This applies to both PATA and SATA drives.
|
2007-05-15 02:28:16 +08:00
|
|
|
*
|
|
|
|
* LOCKING:
|
|
|
|
* EH context.
|
|
|
|
*
|
|
|
|
* RETURNS:
|
|
|
|
* 0 on success, -errno on failure.
|
2006-09-29 02:29:01 +08:00
|
|
|
*/
|
|
|
|
int ata_acpi_exec_tfs(struct ata_port *ap)
|
|
|
|
{
|
2007-05-15 02:28:16 +08:00
|
|
|
int ix, ret = 0;
|
2006-09-29 02:29:01 +08:00
|
|
|
|
2007-03-10 07:15:33 +08:00
|
|
|
/*
|
|
|
|
* TBD - implement PATA support. For now,
|
|
|
|
* we should not run GTF on PATA devices since some
|
|
|
|
* PATA require execution of GTM/STM before GTF.
|
|
|
|
*/
|
2007-05-15 02:28:15 +08:00
|
|
|
if (!(ap->flags & ATA_FLAG_ACPI_SATA))
|
2007-03-10 07:15:33 +08:00
|
|
|
return 0;
|
2006-09-29 02:29:01 +08:00
|
|
|
|
|
|
|
for (ix = 0; ix < ATA_MAX_DEVICES; ix++) {
|
2007-05-05 22:50:38 +08:00
|
|
|
struct ata_device *dev = &ap->device[ix];
|
2007-05-15 02:28:16 +08:00
|
|
|
struct ata_acpi_gtf *gtf = NULL;
|
|
|
|
int gtf_count;
|
|
|
|
void *ptr_to_free = NULL;
|
2007-05-05 22:50:38 +08:00
|
|
|
|
|
|
|
if (!ata_dev_enabled(dev))
|
2006-09-29 02:29:01 +08:00
|
|
|
continue;
|
|
|
|
|
2007-05-15 02:28:16 +08:00
|
|
|
ret = ata_dev_get_GTF(dev, >f, &ptr_to_free);
|
|
|
|
if (ret == 0)
|
|
|
|
continue;
|
2007-05-15 02:28:16 +08:00
|
|
|
if (ret < 0)
|
2006-09-29 02:29:01 +08:00
|
|
|
break;
|
2007-05-15 02:28:16 +08:00
|
|
|
gtf_count = ret;
|
2006-09-29 02:29:01 +08:00
|
|
|
|
2007-05-15 02:28:16 +08:00
|
|
|
ret = ata_dev_set_taskfiles(dev, gtf, gtf_count);
|
|
|
|
kfree(ptr_to_free);
|
2007-05-15 02:28:16 +08:00
|
|
|
if (ret < 0)
|
2006-09-29 02:29:01 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2006-09-29 02:29:12 +08:00
|
|
|
/**
|
|
|
|
* ata_acpi_push_id - send Identify data to drive
|
2007-05-05 22:50:38 +08:00
|
|
|
* @dev: target ATA device
|
2006-09-29 02:29:12 +08:00
|
|
|
*
|
|
|
|
* _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.
|
2007-05-15 02:28:16 +08:00
|
|
|
*
|
|
|
|
* LOCKING:
|
|
|
|
* EH context.
|
|
|
|
*
|
|
|
|
* RETURNS:
|
|
|
|
* 0 on success, -errno on failure.
|
2006-09-29 02:29:12 +08:00
|
|
|
*/
|
2007-05-05 22:50:38 +08:00
|
|
|
int ata_acpi_push_id(struct ata_device *dev)
|
2006-09-29 02:29:12 +08:00
|
|
|
{
|
2007-05-05 22:50:38 +08:00
|
|
|
struct ata_port *ap = dev->ap;
|
|
|
|
int err;
|
|
|
|
acpi_status status;
|
|
|
|
struct acpi_object_list input;
|
|
|
|
union acpi_object in_params[1];
|
2006-09-29 02:29:12 +08:00
|
|
|
|
2007-05-15 02:28:16 +08:00
|
|
|
if (!dev->acpi_handle)
|
2006-09-29 02:29:12 +08:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (ata_msg_probe(ap))
|
2007-05-05 22:50:38 +08:00
|
|
|
ata_dev_printk(dev, KERN_DEBUG, "%s: ix = %d, port#: %d\n",
|
|
|
|
__FUNCTION__, dev->devno, ap->port_no);
|
2006-09-29 02:29:12 +08:00
|
|
|
|
|
|
|
/* Don't continue if not a SATA device. */
|
2007-05-15 02:28:15 +08:00
|
|
|
if (!(ap->flags & ATA_FLAG_ACPI_SATA)) {
|
2006-09-29 02:29:12 +08:00
|
|
|
if (ata_msg_probe(ap))
|
2007-05-05 22:50:38 +08:00
|
|
|
ata_dev_printk(dev, KERN_DEBUG,
|
2006-09-29 02:29:12 +08:00
|
|
|
"%s: Not a SATA device\n", __FUNCTION__);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* 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;
|
2007-05-05 22:50:38 +08:00
|
|
|
in_params[0].buffer.length = sizeof(dev->id[0]) * ATA_ID_WORDS;
|
|
|
|
in_params[0].buffer.pointer = (u8 *)dev->id;
|
2006-09-29 02:29:12 +08:00
|
|
|
/* Output buffer: _SDD has no output */
|
|
|
|
|
|
|
|
/* It's OK for _SDD to be missing too. */
|
2007-05-05 22:50:38 +08:00
|
|
|
swap_buf_le16(dev->id, ATA_ID_WORDS);
|
2007-05-15 02:28:16 +08:00
|
|
|
status = acpi_evaluate_object(dev->acpi_handle, "_SDD", &input, NULL);
|
2007-05-05 22:50:38 +08:00
|
|
|
swap_buf_le16(dev->id, ATA_ID_WORDS);
|
2006-09-29 02:29:12 +08:00
|
|
|
|
|
|
|
err = ACPI_FAILURE(status) ? -EIO : 0;
|
2007-05-15 02:28:16 +08:00
|
|
|
if (err < 0)
|
|
|
|
ata_dev_printk(dev, KERN_WARNING,
|
|
|
|
"ACPI _SDD failed (AE 0x%x)\n", status);
|
2006-09-29 02:29:12 +08:00
|
|
|
|
|
|
|
/* always return success */
|
|
|
|
out:
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|