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authorMatthew R. Ochs <mrochs@linux.vnet.ibm.com>2017-01-11 19:19:33 -0600
committerMartin K. Petersen <martin.petersen@oracle.com>2017-01-11 22:38:15 -0500
commit696d0b0c715360ce28fedd3c8b009d3771a5ddeb (patch)
treee7839b1a84db03979016193800b56d26baf18cf6 /include/uapi/scsi
parent9c7d1ee5f13a7130f6d3df307ec010e9e003fa98 (diff)
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 'include/uapi/scsi')
-rw-r--r--include/uapi/scsi/cxlflash_ioctl.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/scsi/cxlflash_ioctl.h b/include/uapi/scsi/cxlflash_ioctl.h
index 6bf1f8a022b1..e9fdc12ad984 100644
--- a/include/uapi/scsi/cxlflash_ioctl.h
+++ b/include/uapi/scsi/cxlflash_ioctl.h
@@ -40,6 +40,7 @@ struct dk_cxlflash_hdr {
*/
#define DK_CXLFLASH_ALL_PORTS_ACTIVE 0x0000000000000001ULL
#define DK_CXLFLASH_APP_CLOSE_ADAP_FD 0x0000000000000002ULL
+#define DK_CXLFLASH_CONTEXT_SQ_CMD_MODE 0x0000000000000004ULL
/*
* General Notes:

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