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libata: clean up lpm related symbols and sysfs show/store functions

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Link power management related symbols are in confusing state w/ mixed
usages of lpm, ipm and pm.  This patch cleans up lpm related symbols
and sysfs show/store functions as follows.

* lpm states - NOT_AVAILABLE, MIN_POWER, MAX_PERFORMANCE and
  MEDIUM_POWER are renamed to ATA_LPM_UNKNOWN and
  ATA_LPM_{MIN|MAX|MED}_POWER.

* Pre/postfixes are unified to lpm.

* sysfs show/store functions for link_power_management_policy were
  curiously named get/put and unnecessarily complex.  Renamed to
  show/store and simplified.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Tejun Heo 2010-09-01 17:50:04 +02:00 • committed by Jeff Garzik
parent c43d559f04
commit c93b263e0d
9 changed files with 79 additions and 100 deletions
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29
include/linux/libata.h
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@ -196,7 +196,7 @@ 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 */
ATA_FLAG_LPM = (1 << 20), /* driver can handle LPM */
ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
* management */
ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
@ -377,7 +377,7 @@ enum {
ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
ATA_HORKAGE_LPM = (1 << 7), /* Link PM problems */
ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
@ -464,6 +464,17 @@ enum ata_completion_errors {
AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
};
/*
* Link power management policy: If you alter this, you also need to
* alter libata-scsi.c (for the ascii descriptions)
*/
enum ata_lpm_policy {
ATA_LPM_UNKNOWN,
ATA_LPM_MAX_POWER,
ATA_LPM_MED_POWER,
ATA_LPM_MIN_POWER,
};
/* forward declarations */
struct scsi_device;
struct ata_port_operations;
@ -478,16 +489,6 @@ 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 device_attribute dev_attr_link_power_management_policy;
extern struct device_attribute dev_attr_unload_heads;
extern struct device_attribute dev_attr_em_message_type;
@ -772,7 +773,7 @@ struct ata_port {
pm_message_t pm_mesg;
int *pm_result;
enum link_pm pm_policy;
enum ata_lpm_policy lpm_policy;
struct timer_list fastdrain_timer;
unsigned long fastdrain_cnt;
@ -838,7 +839,7 @@ struct ata_port_operations {
int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
void (*pmp_attach)(struct ata_port *ap);
void (*pmp_detach)(struct ata_port *ap);
int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
int (*enable_pm)(struct ata_port *ap, enum ata_lpm_policy policy);
void (*disable_pm)(struct ata_port *ap);
/*