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RDMA/efa: Support QP with unsolicited write w/ imm. receive

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Add a new EFA flags attribute for QP creation, and support unsolicited
write with immediate flag. QPs created with this flag set will not
consume receive work requests for incoming RDMA write with immediate.
Expose device capability bit for this feature support.

Reviewed-by: Daniel Kranzdorf <dkkranzd@amazon.com>
Reviewed-by: Firas Jahjah <firasj@amazon.com>
Signed-off-by: Michael Margolin <mrgolin@amazon.com>
Link: https://lore.kernel.org/r/20240506151829.6475-1-mrgolin@amazon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Michael Margolin
2024-05-06 15:18:29 +00:00
committed by Leon Romanovsky
parent f483f6a29d
commit 2b8af5001a
5 changed files with 38 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
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@@ -110,7 +110,10 @@ struct efa_admin_create_qp_cmd {
* virtual (IOVA returned by MR registration)
* 1 : rq_virt - If set, RQ ring base address is
* virtual (IOVA returned by MR registration)
* 7:2 : reserved - MBZ
* 2 : unsolicited_write_recv - If set, work requests
* will not be consumed for incoming RDMA write with
* immediate
* 7:3 : reserved - MBZ
*/
u8 flags;
@@ -663,7 +666,9 @@ struct efa_admin_feature_device_attr_desc {
* polling is supported
* 3 : rdma_write - If set, RDMA Write is supported
* on TX queues
* 31:4 : reserved - MBZ
* 4 : unsolicited_write_recv - If set, unsolicited
* write with imm. receive is supported
* 31:5 : reserved - MBZ
*/
u32 device_caps;
@@ -1009,6 +1014,7 @@ struct efa_admin_host_info {
/* create_qp_cmd */
#define EFA_ADMIN_CREATE_QP_CMD_SQ_VIRT_MASK BIT(0)
#define EFA_ADMIN_CREATE_QP_CMD_RQ_VIRT_MASK BIT(1)
#define EFA_ADMIN_CREATE_QP_CMD_UNSOLICITED_WRITE_RECV_MASK BIT(2)
/* modify_qp_cmd */
#define EFA_ADMIN_MODIFY_QP_CMD_QP_STATE_MASK BIT(0)
@@ -1044,6 +1050,7 @@ struct efa_admin_host_info {
#define EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_RNR_RETRY_MASK BIT(1)
#define EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_DATA_POLLING_128_MASK BIT(2)
#define EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_RDMA_WRITE_MASK BIT(3)
#define EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_UNSOLICITED_WRITE_RECV_MASK BIT(4)
/* create_eq_cmd */
#define EFA_ADMIN_CREATE_EQ_CMD_ENTRY_SIZE_WORDS_MASK GENMASK(4, 0)