[PATCH] libata-eh-fw: add flags and operations for new EH

Add ATA_FLAG_EH_{PENDING|FROZEN}, ATA_ATA_QCFLAG_{FAILED|SENSE_VALID}
and ops->freeze, thaw, error_handler, post_internal_cmd() for new EH.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 20 insertions, 7 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 91e10e6b7565..e5d6d7f8e6dc 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -146,13 +146,16 @@ enum {
         ATA_FLAG_PIO_LBA48      = (1 << 8), /* Host DMA engine is LBA28 only */
         ATA_FLAG_IRQ_MASK       = (1 << 9), /* Mask IRQ in PIO xfers */
 
-        ATA_FLAG_NOINTR         = (1 << 16), /* FIXME: Remove this once
+        ATA_FLAG_NOINTR         = (1 << 13), /* FIXME: Remove this once
                                               * proper HSM is in place. */
-        ATA_FLAG_DEBUGMSG       = (1 << 17),
-        ATA_FLAG_FLUSH_PORT_TASK = (1 << 18), /* flush port task */
+        ATA_FLAG_DEBUGMSG       = (1 << 14),
+        ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* flush port task */
 
-        ATA_FLAG_DISABLED       = (1 << 19), /* port is disabled, ignore it */
-        ATA_FLAG_SUSPENDED      = (1 << 20), /* port is suspended */
+        ATA_FLAG_EH_PENDING     = (1 << 16), /* EH pending */
+        ATA_FLAG_FROZEN         = (1 << 17), /* port is frozen */
+
+        ATA_FLAG_DISABLED       = (1 << 22), /* port is disabled, ignore it */
+        ATA_FLAG_SUSPENDED      = (1 << 23), /* port is suspended (power) */
 
         /* bits 24:31 of ap->flags are reserved for LLDD specific flags */
 
@@ -164,7 +167,9 @@ enum {
         ATA_QCFLAG_IO           = (1 << 3), /* standard IO command */
         ATA_QCFLAG_RESULT_TF    = (1 << 4), /* result TF requested */
 
-        ATA_QCFLAG_EH_SCHEDULED = (1 << 16), /* EH scheduled */
+        ATA_QCFLAG_FAILED       = (1 << 16), /* cmd failed and is owned by EH */
+        ATA_QCFLAG_SENSE_VALID  = (1 << 17), /* sense data valid */
+        ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
 
         /* host set flags */
         ATA_HOST_SIMPLEX        = (1 << 0),     /* Host is simplex, one DMA channel per host_set only */
@@ -463,7 +468,15 @@ struct ata_port_operations {
         void (*qc_prep) (struct ata_queued_cmd *qc);
         unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
 
-        void (*eng_timeout) (struct ata_port *ap);
+        /* Error handlers.  ->error_handler overrides ->eng_timeout and
+         * indicates that new-style EH is in place.
+         */
+        void (*eng_timeout) (struct ata_port *ap); /* obsolete */
+
+        void (*freeze) (struct ata_port *ap);
+        void (*thaw) (struct ata_port *ap);
+        void (*error_handler) (struct ata_port *ap);
+        void (*post_internal_cmd) (struct ata_queued_cmd *qc);
 
         irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
         void (*irq_clear) (struct ata_port *);