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libata-pmp-prep: add PMP related constants, fields, ops and update helpers

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Add PMP related constants, fields and ops.  Also, update
ata_class_enabled/disabled() such that PMP classes are considered.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-09-23 13:14:12 +09:00 committed by Jeff Garzik
parent 854c73a2f1
commit e0a7175263
1 changed files with 26 additions and 4 deletions
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30
include/linux/libata.h
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@ -155,7 +155,11 @@ enum {
ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
ATA_DEV_ATAPI = 3, /* ATAPI device */
ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
ATA_DEV_NONE = 5, /* no device */
ATA_DEV_PMP = 5, /* SATA port multiplier */
ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
ATA_DEV_SEMB = 7, /* SEMB */
ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
ATA_DEV_NONE = 9, /* no device */
/* struct ata_link flags */
ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
@ -181,6 +185,7 @@ enum {
ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
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 */
/* The following flag belongs to ap->pflags but is kept in
* ap->flags because it's referenced in many LLDs and will be
@ -299,6 +304,10 @@ enum {
/* how hard are we gonna try to probe/recover devices */
ATA_PROBE_MAX_TRIES = 3,
ATA_EH_DEV_TRIES = 3,
ATA_EH_PMP_TRIES = 5,
ATA_EH_PMP_LINK_TRIES = 3,
SATA_PMP_SCR_TIMEOUT = 250,
/* Horkage types. May be set by libata or controller on drives
(some horkage may be drive/controller pair dependant */
@ -450,7 +459,12 @@ struct ata_device {
/* 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 */
u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
union {
u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
};
u8 pio_mode;
u8 dma_mode;
u8 xfer_mode;
@ -628,6 +642,12 @@ struct ata_port_operations {
void (*qc_prep) (struct ata_queued_cmd *qc);
unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
/* port multiplier */
void (*pmp_attach) (struct ata_port *ap);
void (*pmp_detach) (struct ata_port *ap);
int (*pmp_read) (struct ata_device *dev, int pmp, int reg, u32 *r_val);
int (*pmp_write) (struct ata_device *dev, int pmp, int reg, u32 val);
/* Error handlers. ->error_handler overrides ->eng_timeout and
* indicates that new-style EH is in place.
*/
@ -1033,12 +1053,14 @@ static inline unsigned int ata_tag_internal(unsigned int tag)
*/
static inline unsigned int ata_class_enabled(unsigned int class)
{
return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
}
static inline unsigned int ata_class_disabled(unsigned int class)
{
return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
}
static inline unsigned int ata_class_absent(unsigned int class)