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RDMA/efa: Introduce SRD RNR retry

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This patch introduces the ability to configure SRD QPs with the RNR retry
parameter when issuing a modify QP command.

In addition, a capability bit was added to report support to the userspace
library.

Link: https://lore.kernel.org/r/20200731060420.17053-5-galpress@amazon.com
Reviewed-by: Firas JahJah <firasj@amazon.com>
Reviewed-by: Yossi Leybovich <sleybo@amazon.com>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Gal Pressman
2020-07-31 09:04:20 +03:00
committed by Jason Gunthorpe
parent 22c50e0660
commit a4e6a1dd57
5 changed files with 32 additions and 9 deletions
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17
drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
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@@ -197,7 +197,8 @@ struct efa_admin_modify_qp_cmd {
* 2 : qkey
* 3 : sq_psn
* 4 : sq_drained_async_notify
* 31:5 : reserved
* 5 : rnr_retry
* 31:6 : reserved
*/
u32 modify_mask;
@@ -219,8 +220,8 @@ struct efa_admin_modify_qp_cmd {
/* Enable async notification when SQ is drained */
u8 sq_drained_async_notify;
/* MBZ */
u8 reserved1;
/* Number of RNR retries (valid only for SRD QPs) */
u8 rnr_retry;
/* MBZ */
u16 reserved2;
@@ -255,8 +256,8 @@ struct efa_admin_query_qp_resp {
/* Indicates that draining is in progress */
u8 sq_draining;
/* MBZ */
u8 reserved1;
/* Number of RNR retries (valid only for SRD QPs) */
u8 rnr_retry;
/* MBZ */
u16 reserved2;
@@ -573,7 +574,9 @@ struct efa_admin_feature_device_attr_desc {
/*
* 0 : rdma_read - If set, RDMA Read is supported on
* TX queues
* 31:1 : reserved - MBZ
* 1 : rnr_retry - If set, RNR retry is supported on
* modify QP command
* 31:2 : reserved - MBZ
*/
u32 device_caps;
@@ -865,6 +868,7 @@ struct efa_admin_host_info {
#define EFA_ADMIN_MODIFY_QP_CMD_QKEY_MASK BIT(2)
#define EFA_ADMIN_MODIFY_QP_CMD_SQ_PSN_MASK BIT(3)
#define EFA_ADMIN_MODIFY_QP_CMD_SQ_DRAINED_ASYNC_NOTIFY_MASK BIT(4)
#define EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY_MASK BIT(5)
/* reg_mr_cmd */
#define EFA_ADMIN_REG_MR_CMD_PHYS_PAGE_SIZE_SHIFT_MASK GENMASK(4, 0)
@@ -882,6 +886,7 @@ struct efa_admin_host_info {
/* feature_device_attr_desc */
#define EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_RDMA_READ_MASK BIT(0)
#define EFA_ADMIN_FEATURE_DEVICE_ATTR_DESC_RNR_RETRY_MASK BIT(1)
/* host_info */
#define EFA_ADMIN_HOST_INFO_DRIVER_MODULE_TYPE_MASK GENMASK(7, 0)