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Merge branch 'alpm' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev

Browse source 
* 'alpm' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  [libata] AHCI: add hw link power management support
  [libata] Link power management infrastructure
This commit is contained in:
Linus Torvalds 2007-10-29 12:12:34 -07:00
commit 3529a23342
8 changed files with 484 additions and 4 deletions
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21
include/linux/ata.h
View file

@ -236,6 +236,7 @@ enum {
/* SETFEATURE Sector counts for SATA features */
SATA_AN = 0x05, /* Asynchronous Notification */
SATA_DIPM = 0x03, /* Device Initiated Power Management */
/* ATAPI stuff */
ATAPI_PKT_DMA = (1 << 0),
@ -378,6 +379,26 @@ struct ata_taskfile {
#define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20)
static inline bool ata_id_has_hipm(const u16 *id)
{
u16 val = id[76];
if (val == 0 || val == 0xffff)
return false;
return val & (1 << 9);
}
static inline bool ata_id_has_dipm(const u16 *id)
{
u16 val = id[78];
if (val == 0 || val == 0xffff)
return false;
return val & (1 << 3);
}
static inline int ata_id_has_fua(const u16 *id)
{
if ((id[84] & 0xC000) != 0x4000)

21
include/linux/libata.h
View file

@ -133,6 +133,8 @@ enum {
ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
ATA_DFLAG_AN = (1 << 7), /* AN configured */
ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
@ -186,6 +188,7 @@ enum {
ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
ATA_FLAG_AN = (1 << 18), /* controller supports AN */
ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
/* The following flag belongs to ap->pflags but is kept in
* ap->flags because it's referenced in many LLDs and will be
@ -302,6 +305,7 @@ enum {
ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
ATA_EHI_QUIET = (1 << 3), /* be quiet */
ATA_EHI_LPM = (1 << 4), /* link power management action */
ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
@ -333,6 +337,7 @@ enum {
ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
/* DMA mask for user DMA control: User visible values; DO NOT
renumber */
@ -378,6 +383,18 @@ typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
unsigned long deadline);
typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
/*
* host pm policy: If you alter this, you also need to alter libata-scsi.c
* (for the ascii descriptions)
*/
enum link_pm {
NOT_AVAILABLE,
MIN_POWER,
MAX_PERFORMANCE,
MEDIUM_POWER,
};
extern struct class_device_attribute class_device_attr_link_power_management_policy;
struct ata_ioports {
void __iomem *cmd_addr;
void __iomem *data_addr;
@ -624,6 +641,7 @@ struct ata_port {
pm_message_t pm_mesg;
int *pm_result;
enum link_pm pm_policy;
struct timer_list fastdrain_timer;
unsigned long fastdrain_cnt;
@ -691,7 +709,8 @@ struct ata_port_operations {
int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
int (*port_resume) (struct ata_port *ap);
int (*enable_pm) (struct ata_port *ap, enum link_pm policy);
void (*disable_pm) (struct ata_port *ap);
int (*port_start) (struct ata_port *ap);
void (*port_stop) (struct ata_port *ap);