From 458337dbb120d33f326e2b19d54eca8cf179b5c0 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 2 Feb 2007 16:22:30 +0900 Subject: libata: improve ata_down_xfermask_limit() Make ata_down_xfermask_limit() accept @sel instead of @force_pio0. @sel selects how the xfermask limit will be adjusted. The following selectors are defined. * ATA_DNXFER_PIO : only speed down PIO * ATA_DNXFER_DMA : only speed down DMA, don't cause transfer mode change * ATA_DNXFER_40C : apply 40c cable limit * ATA_DNXFER_FORCE_PIO : force PIO * ATA_DNXFER_FORCE_PIO0 : force PIO0 (same as original with @force_pio0 == 1) * ATA_DNXFER_ANY : same as original with @force_pio0 == 0 Currently, only ANY and FORCE_PIO0 are used to maintain the original behavior. Other selectors will be used later to improve EH speed down sequence. Signed-off-by: Tejun Heo Signed-off-by: Jeff Garzik --- drivers/ata/libata.h | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'drivers/ata/libata.h') diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 0ad7781d72a3..8533de67d87e 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -41,6 +41,16 @@ struct ata_scsi_args { enum { /* flags for ata_dev_read_id() */ ATA_READID_POSTRESET = (1 << 0), /* reading ID after reset */ + + /* selector for ata_down_xfermask_limit() */ + ATA_DNXFER_PIO = 0, /* speed down PIO */ + ATA_DNXFER_DMA = 1, /* speed down DMA */ + ATA_DNXFER_40C = 2, /* apply 40c cable limit */ + ATA_DNXFER_FORCE_PIO = 3, /* force PIO */ + ATA_DNXFER_FORCE_PIO0 = 4, /* force PIO0 */ + ATA_DNXFER_ANY = 5, /* speed down any */ + + ATA_DNXFER_QUIET = (1 << 31), }; extern struct workqueue_struct *ata_aux_wq; @@ -69,7 +79,7 @@ extern int ata_dev_revalidate(struct ata_device *dev, unsigned int flags); extern int ata_dev_configure(struct ata_device *dev); extern int sata_down_spd_limit(struct ata_port *ap); extern int sata_set_spd_needed(struct ata_port *ap); -extern int ata_down_xfermask_limit(struct ata_device *dev, int force_pio0); +extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel); extern int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev); extern void ata_sg_clean(struct ata_queued_cmd *qc); extern void ata_qc_free(struct ata_queued_cmd *qc); -- cgit v1.2.3