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| author | Uma Krishnan <ukrishn@linux.vnet.ibm.com> | 2017-04-12 14:15:42 -0500 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-04-13 22:55:42 -0400 |
| commit | bfc0bab172cabf3bb25c48c4c521b317ff4a909d (patch) | |
| tree | 8419875d813592dc2f0ae01ff95353f60659a465 /drivers/scsi/cxlflash/superpipe.c | |
| parent | e2ef33fa5958c51ebf0c6f18db19fe927e2185fa (diff) | |
| download | lwn-bfc0bab172cabf3bb25c48c4c521b317ff4a909d.tar.gz lwn-bfc0bab172cabf3bb25c48c4c521b317ff4a909d.zip | |
scsi: cxlflash: Support multiple hardware queues
Introduce multiple hardware queues to improve legacy I/O path performance.
Each hardware queue is comprised of a master context and associated I/O
resources. The hardware queues are initially implemented as a static array
embedded in the AFU. This will be transitioned to a dynamic allocation in a
later series to improve the memory footprint of the driver.
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/cxlflash/superpipe.c')
| -rw-r--r-- | drivers/scsi/cxlflash/superpipe.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c index bc6b39275f68..fe9f17a6268b 100644 --- a/drivers/scsi/cxlflash/superpipe.c +++ b/drivers/scsi/cxlflash/superpipe.c @@ -254,6 +254,7 @@ static int afu_attach(struct cxlflash_cfg *cfg, struct ctx_info *ctxi) struct afu *afu = cfg->afu; struct sisl_ctrl_map __iomem *ctrl_map = ctxi->ctrl_map; int rc = 0; + struct hwq *hwq = get_hwq(afu, PRIMARY_HWQ); u64 val; /* Unlock cap and restrict user to read/write cmds in translated mode */ @@ -270,7 +271,7 @@ static int afu_attach(struct cxlflash_cfg *cfg, struct ctx_info *ctxi) /* Set up MMIO registers pointing to the RHT */ writeq_be((u64)ctxi->rht_start, &ctrl_map->rht_start); - val = SISL_RHT_CNT_ID((u64)MAX_RHT_PER_CONTEXT, (u64)(afu->ctx_hndl)); + val = SISL_RHT_CNT_ID((u64)MAX_RHT_PER_CONTEXT, (u64)(hwq->ctx_hndl)); writeq_be(val, &ctrl_map->rht_cnt_id); out: dev_dbg(dev, "%s: returning rc=%d\n", __func__, rc); @@ -1626,6 +1627,7 @@ static int cxlflash_afu_recover(struct scsi_device *sdev, struct afu *afu = cfg->afu; struct ctx_info *ctxi = NULL; struct mutex *mutex = &cfg->ctx_recovery_mutex; + struct hwq *hwq = get_hwq(afu, PRIMARY_HWQ); u64 flags; u64 ctxid = DECODE_CTXID(recover->context_id), rctxid = recover->context_id; @@ -1696,7 +1698,7 @@ retry_recover: } /* Test if in error state */ - reg = readq_be(&afu->ctrl_map->mbox_r); + reg = readq_be(&hwq->ctrl_map->mbox_r); if (reg == -1) { dev_dbg(dev, "%s: MMIO fail, wait for recovery.\n", __func__); |