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libata-acpi: implement ata_acpi_associate()

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* Add acpi_handle to ata_host and ata_port.  Rename
  ata_device->obj_handle to ->acpi_handle and move it above such that
  it doesn't get cleared on reconfiguration.

* Replace ACPI node association which ata_acpi_associate() which is
  called once during host initialization.  Unlike the previous
  implementation, ata_acpi_associate() uses ATA_FLAG_ACPI_SATA to
  choose between IDE or SATA ACPI hierarchy and uses simple child look
  up instead of recursive walk to match the nodes.  This is way safer
  and simpler.  Please read the following message for more info.

  http://article.gmane.org/gmane.linux.ide/17554

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo
2007-05-15 03:28:16 +09:00
committed by Jeff Garzik
parent 7dcca30a32
commit fafbae87db
4 changed files with 64 additions and 325 deletions
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13
include/linux/libata.h
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@ -363,6 +363,9 @@ struct ata_host {
void *private_data;
const struct ata_port_operations *ops;
unsigned long flags;
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
#endif
struct ata_port *simplex_claimed; /* channel owning the DMA */
struct ata_port *ports[0];
};
@ -429,6 +432,9 @@ struct ata_device {
unsigned int devno; /* 0 or 1 */
unsigned long flags; /* ATA_DFLAG_xxx */
struct scsi_device *sdev; /* attached SCSI device */
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
#endif
/* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
u64 n_sectors; /* size of device, if ATA */
unsigned int class; /* ATA_DEV_xxx */
@ -457,10 +463,6 @@ struct ata_device {
struct ata_ering ering;
int spdn_cnt;
unsigned int horkage; /* List of broken features */
#ifdef CONFIG_ATA_ACPI
/* ACPI objects info */
acpi_handle obj_handle;
#endif
};
/* Offset into struct ata_device. Fields above it are maintained
@ -549,6 +551,9 @@ struct ata_port {
void *private_data;
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
#endif
u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
};