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authorStephen M. Cameron <scameron@beardog.cce.hp.com>2014-02-18 23:55:33 +0400
committerJames Bottomley <JBottomley@Parallels.com>2014-03-15 21:19:03 +0400
commit283b4a9b98b192ebc0e15351fd6fb60e1be78c5d (patch)
tree82ec3ca33ea7352e347dcb3b152b6ab95a1c107f /drivers/scsi/hpsa.h
parent17eb87d216a0d8a9fa9852f331a7c6afb9f45312 (diff)
downloadlinux-283b4a9b98b192ebc0e15351fd6fb60e1be78c5d.tar.xz
[SCSI] hpsa: add ioaccell mode 1 RAID offload support.
This enables sending i/o's destined for RAID logical drives which can be serviced by a single physical disk down a different, faster i/o path directly to physical drives for certain logical volumes on SSDs bypassing the Smart Array RAID stack for a performance improvement. Signed-off-by: Matt Gates <matthew.gates@hp.com> Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Scott Teel <scott.teel@hp.com> Signed-off-by: Mike Miller <michael.miller@canonical.com> Signed-off-by: Don Brace <brace@beardog.cce.hp.com> Signed-off-by: Joe Handzik <joseph.t.handzik@hp.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/hpsa.h')
-rw-r--r--drivers/scsi/hpsa.h26
1 files changed, 21 insertions, 5 deletions
diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h
index c7865f30ffd1..ae08f1c46272 100644
--- a/drivers/scsi/hpsa.h
+++ b/drivers/scsi/hpsa.h
@@ -47,6 +47,13 @@ struct hpsa_scsi_dev_t {
unsigned char model[16]; /* bytes 16-31 of inquiry data */
unsigned char raid_level; /* from inquiry page 0xC1 */
u32 ioaccel_handle;
+ int offload_config; /* I/O accel RAID offload configured */
+ int offload_enabled; /* I/O accel RAID offload enabled */
+ int offload_to_mirror; /* Send next I/O accelerator RAID
+ * offload request to mirror drive
+ */
+ struct raid_map_data raid_map; /* I/O accelerator RAID map */
+
};
struct reply_pool {
@@ -133,6 +140,10 @@ struct ctlr_info {
u32 *blockFetchTable;
u32 *ioaccel1_blockFetchTable;
unsigned char *hba_inquiry_data;
+ u32 driver_support;
+ u32 fw_support;
+ int ioaccel_support;
+ int ioaccel_maxsg;
u64 last_intr_timestamp;
u32 last_heartbeat;
u64 last_heartbeat_timestamp;
@@ -406,8 +417,7 @@ static bool SA5_ioaccel_mode1_intr_pending(struct ctlr_info *h)
#define IOACCEL_MODE1_CONSUMER_INDEX 0x1BC
#define IOACCEL_MODE1_REPLY_UNUSED 0xFFFFFFFFFFFFFFFFULL
-static unsigned long SA5_ioaccel_mode1_completed(struct ctlr_info *h,
- u8 q)
+static unsigned long SA5_ioaccel_mode1_completed(struct ctlr_info *h, u8 q)
{
u64 register_value;
struct reply_pool *rq = &h->reply_queue[q];
@@ -420,12 +430,18 @@ static unsigned long SA5_ioaccel_mode1_completed(struct ctlr_info *h,
rq->head[rq->current_entry] = IOACCEL_MODE1_REPLY_UNUSED;
if (++rq->current_entry == rq->size)
rq->current_entry = 0;
+ /*
+ * @todo
+ *
+ * Don't really need to write the new index after each command,
+ * but with current driver design this is easiest.
+ */
+ wmb();
+ writel((q << 24) | rq->current_entry, h->vaddr +
+ IOACCEL_MODE1_CONSUMER_INDEX);
spin_lock_irqsave(&h->lock, flags);
h->commands_outstanding--;
spin_unlock_irqrestore(&h->lock, flags);
- } else {
- writel((q << 24) | rq->current_entry,
- h->vaddr + IOACCEL_MODE1_CONSUMER_INDEX);
}
return (unsigned long) register_value;
}