diff options
| author | Matthew R. Ochs <mrochs@linux.vnet.ibm.com> | 2017-01-12 02:19:33 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-01-12 04:38:15 +0100 |
| commit | 696d0b0c715360ce28fedd3c8b009d3771a5ddeb (patch) | |
| tree | e7839b1a84db03979016193800b56d26baf18cf6 /drivers/scsi/cxlflash/superpipe.c | |
| parent | scsi: cxlflash: Refactor context reset to share reset logic (diff) | |
| download | linux-696d0b0c715360ce28fedd3c8b009d3771a5ddeb.tar.xz linux-696d0b0c715360ce28fedd3c8b009d3771a5ddeb.zip | |
scsi: cxlflash: Support SQ Command Mode
The SISLite specification outlines a new queuing model to improve
over the MMIO-based IOARRIN model that exists today. This new model
uses a submission queue that exists in host memory and is shared with
the device. Each entry in the queue is an IOARCB that describes a
transfer request. When requests are submitted, IOARCBs ('current'
position tracked in host software) are populated and the submission
queue tail pointer is then updated via MMIO to make the device aware
of the requests.
Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn@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 | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c index 9636970d9611..42674ae6f4dd 100644 --- a/drivers/scsi/cxlflash/superpipe.c +++ b/drivers/scsi/cxlflash/superpipe.c @@ -1287,6 +1287,7 @@ static int cxlflash_disk_attach(struct scsi_device *sdev, int rc = 0; u32 perms; int ctxid = -1; + u64 flags = 0UL; u64 rctxid = 0UL; struct file *file = NULL; @@ -1426,10 +1427,11 @@ static int cxlflash_disk_attach(struct scsi_device *sdev, out_attach: if (fd != -1) - attach->hdr.return_flags = DK_CXLFLASH_APP_CLOSE_ADAP_FD; - else - attach->hdr.return_flags = 0; + flags |= DK_CXLFLASH_APP_CLOSE_ADAP_FD; + if (afu_is_sq_cmd_mode(afu)) + flags |= DK_CXLFLASH_CONTEXT_SQ_CMD_MODE; + attach->hdr.return_flags = flags; attach->context_id = ctxi->ctxid; attach->block_size = gli->blk_len; attach->mmio_size = sizeof(afu->afu_map->hosts[0].harea); @@ -1617,6 +1619,7 @@ 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; + u64 flags; u64 ctxid = DECODE_CTXID(recover->context_id), rctxid = recover->context_id; long reg; @@ -1672,11 +1675,16 @@ retry_recover: } ctxi->err_recovery_active = false; + + flags = DK_CXLFLASH_APP_CLOSE_ADAP_FD | + DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET; + if (afu_is_sq_cmd_mode(afu)) + flags |= DK_CXLFLASH_CONTEXT_SQ_CMD_MODE; + + recover->hdr.return_flags = flags; recover->context_id = ctxi->ctxid; recover->adap_fd = new_adap_fd; recover->mmio_size = sizeof(afu->afu_map->hosts[0].harea); - recover->hdr.return_flags = DK_CXLFLASH_APP_CLOSE_ADAP_FD | - DK_CXLFLASH_RECOVER_AFU_CONTEXT_RESET; goto out; } |