diff options
| author | Stephen M. Cameron <scameron@beardog.cce.hp.com> | 2014-02-18 13:55:33 -0600 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2014-03-15 10:19:03 -0700 |
| commit | 283b4a9b98b192ebc0e15351fd6fb60e1be78c5d (patch) | |
| tree | 82ec3ca33ea7352e347dcb3b152b6ab95a1c107f /drivers/scsi/hpsa.h | |
| parent | 17eb87d216a0d8a9fa9852f331a7c6afb9f45312 (diff) | |
| download | lwn-283b4a9b98b192ebc0e15351fd6fb60e1be78c5d.tar.gz lwn-283b4a9b98b192ebc0e15351fd6fb60e1be78c5d.zip | |
[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.h | 26 |
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; } |