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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
View file

@ -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)

2
drivers/infiniband/hw/efa/efa_com_cmd.c
View file

@ -76,6 +76,7 @@ int efa_com_modify_qp(struct efa_com_dev *edev,
cmd.qkey = params->qkey;
cmd.sq_psn = params->sq_psn;
cmd.sq_drained_async_notify = params->sq_drained_async_notify;
cmd.rnr_retry = params->rnr_retry;
err = efa_com_cmd_exec(aq,
(struct efa_admin_aq_entry *)&cmd,
@ -121,6 +122,7 @@ int efa_com_query_qp(struct efa_com_dev *edev,
result->qkey = resp.qkey;
result->sq_draining = resp.sq_draining;
result->sq_psn = resp.sq_psn;
result->rnr_retry = resp.rnr_retry;
return 0;
}

2
drivers/infiniband/hw/efa/efa_com_cmd.h
View file

@ -47,6 +47,7 @@ struct efa_com_modify_qp_params {
u32 qkey;
u32 sq_psn;
u8 sq_drained_async_notify;
u8 rnr_retry;
};
struct efa_com_query_qp_params {
@ -58,6 +59,7 @@ struct efa_com_query_qp_result {
u32 qkey;
u32 sq_draining;
u32 sq_psn;
u8 rnr_retry;
};
struct efa_com_destroy_qp_params {

19
drivers/infiniband/hw/efa/efa_verbs.c
View file

@ -223,6 +223,9 @@ int efa_query_device(struct ib_device *ibdev,
if (EFA_DEV_CAP(dev, RDMA_READ))
resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RDMA_READ;
if (EFA_DEV_CAP(dev, RNR_RETRY))
resp.device_caps |= EFA_QUERY_DEVICE_CAPS_RNR_RETRY;
err = ib_copy_to_udata(udata, &resp,
min(sizeof(resp), udata->outlen));
if (err) {
@ -268,7 +271,7 @@ int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
#define EFA_QUERY_QP_SUPP_MASK \
(IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT | \
IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP)
IB_QP_QKEY | IB_QP_SQ_PSN | IB_QP_CAP | IB_QP_RNR_RETRY)
if (qp_attr_mask & ~EFA_QUERY_QP_SUPP_MASK) {
ibdev_dbg(&dev->ibdev,
@ -290,6 +293,7 @@ int efa_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
qp_attr->sq_psn = result.sq_psn;
qp_attr->sq_draining = result.sq_draining;
qp_attr->port_num = 1;
qp_attr->rnr_retry = result.rnr_retry;
qp_attr->cap.max_send_wr = qp->max_send_wr;
qp_attr->cap.max_recv_wr = qp->max_recv_wr;
@ -776,7 +780,9 @@ static const struct {
.valid = 1,
.req_param = IB_QP_SQ_PSN,
.opt_param = IB_QP_CUR_STATE |
IB_QP_QKEY,
IB_QP_QKEY |
IB_QP_RNR_RETRY,
}
},
[IB_QPS_RTS] = {
@ -856,7 +862,8 @@ static int efa_modify_qp_validate(struct efa_dev *dev, struct efa_qp *qp,
#define EFA_MODIFY_QP_SUPP_MASK \
(IB_QP_STATE | IB_QP_CUR_STATE | IB_QP_EN_SQD_ASYNC_NOTIFY | \
IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN)
IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY | IB_QP_SQ_PSN | \
IB_QP_RNR_RETRY)
if (qp_attr_mask & ~EFA_MODIFY_QP_SUPP_MASK) {
ibdev_dbg(&dev->ibdev,
@ -943,6 +950,12 @@ int efa_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
params.sq_psn = qp_attr->sq_psn;
}
if (qp_attr_mask & IB_QP_RNR_RETRY) {
EFA_SET(&params.modify_mask, EFA_ADMIN_MODIFY_QP_CMD_RNR_RETRY,
1);
params.rnr_retry = qp_attr->rnr_retry;
}
err = efa_com_modify_qp(&dev->edev, &params);
if (err)
return err;

1
include/uapi/rdma/efa-abi.h
View file

@ -105,6 +105,7 @@ struct efa_ibv_create_ah_resp {
enum {
EFA_QUERY_DEVICE_CAPS_RDMA_READ = 1 << 0,
EFA_QUERY_DEVICE_CAPS_RNR_RETRY = 1 << 1,
};
struct efa_ibv_ex_query_device_resp {