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authorTejun Heo <htejun@gmail.com>2007-05-15 03:28:16 +0900
committerJeff Garzik <jeff@garzik.org>2007-07-09 12:17:32 -0400
commit64578a3de723d502621860f9d4d28f34d001b066 (patch)
tree821e7ad8e8d6c3a0f3224b479ff000e00001a165 /include
parente5fa24dfdb522b642dbe9b8b1b692f68dce89835 (diff)
downloadop-kernel-dev-64578a3de723d502621860f9d4d28f34d001b066.zip
op-kernel-dev-64578a3de723d502621860f9d4d28f34d001b066.tar.gz
libata-acpi: implement _GTM/_STM support
Implement _GTM/_STM support. acpi_gtm is added to ata_port which stores _GTM parameters over suspend/resume cycle. A new hook ata_acpi_on_suspend() is responsible for storing _GTM parameters during suspend. _STM is executed in ata_acpi_on_resume(). With this change, invoking _GTF is safe on IDE hierarchy and acpi_sata check before _GTF is removed. ata_acpi_gtm() and ata_acpi_stm() implementation is taken from Alan Cox's pata_acpi implementation. ata_acpi_gtm() is fixed such that the result parameter is not shifted by sizeof(union acpi_object). Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/libata.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 0c4f63b..8d3e391 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -198,6 +198,7 @@ enum {
ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
+ ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */
/* struct ata_queued_cmd flags */
ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
@@ -493,6 +494,17 @@ struct ata_eh_context {
unsigned int did_probe_mask;
};
+struct ata_acpi_drive
+{
+ u32 pio;
+ u32 dma;
+} __packed;
+
+struct ata_acpi_gtm {
+ struct ata_acpi_drive drive[2];
+ u32 flags;
+} __packed;
+
struct ata_port {
struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
const struct ata_port_operations *ops;
@@ -555,6 +567,7 @@ struct ata_port {
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
+ struct ata_acpi_gtm acpi_gtm;
#endif
u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
};
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