Each QP has a work for reflushing purpose. In the work, driver will
report the latest pi to hardware.
Signed-off-by: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/erdma/erdma_hw.h | 8 ++++++++
drivers/infiniband/hw/erdma/erdma_verbs.c | 18 ++++++++++++++++++
drivers/infiniband/hw/erdma/erdma_verbs.h | 2 ++
3 files changed, 28 insertions(+)
diff --git a/drivers/infiniband/hw/erdma/erdma_hw.h b/drivers/infiniband/hw/erdma/erdma_hw.h
index 1b2e2b70678f..ab371fec610c 100644
--- a/drivers/infiniband/hw/erdma/erdma_hw.h
+++ b/drivers/infiniband/hw/erdma/erdma_hw.h
@@ -145,6 +145,7 @@ enum CMDQ_RDMA_OPCODE {
CMDQ_OPCODE_MODIFY_QP = 3,
CMDQ_OPCODE_CREATE_CQ = 4,
CMDQ_OPCODE_DESTROY_CQ = 5,
+ CMDQ_OPCODE_REFLUSH = 6,
CMDQ_OPCODE_REG_MR = 8,
CMDQ_OPCODE_DEREG_MR = 9
};
@@ -301,6 +302,13 @@ struct erdma_cmdq_destroy_qp_req {
u32 qpn;
};
+struct erdma_cmdq_reflush_req {
+ u64 hdr;
+ u32 qpn;
+ u32 sq_pi;
+ u32 rq_pi;
+};
+
/* cap qword 0 definition */
#define ERDMA_CMD_DEV_CAP_MAX_CQE_MASK GENMASK_ULL(47, 40)
#define ERDMA_CMD_DEV_CAP_FLAGS_MASK GENMASK_ULL(31, 24)
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.c b/drivers/infiniband/hw/erdma/erdma_verbs.c
index d843ce1f35f3..5dab1e87975b 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.c
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.c
@@ -379,6 +379,21 @@ int erdma_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
return 0;
}
+static void erdma_flush_worker(struct work_struct *work)
+{
+ struct delayed_work *dwork = to_delayed_work(work);
+ struct erdma_qp *qp =
+ container_of(dwork, struct erdma_qp, reflush_dwork);
+ struct erdma_cmdq_reflush_req req;
+
+ erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA,
+ CMDQ_OPCODE_REFLUSH);
+ req.qpn = QP_ID(qp);
+ req.sq_pi = qp->kern_qp.sq_pi;
+ req.rq_pi = qp->kern_qp.rq_pi;
+ erdma_post_cmd_wait(&qp->dev->cmdq, &req, sizeof(req), NULL, NULL);
+}
+
static int erdma_qp_validate_cap(struct erdma_dev *dev,
struct ib_qp_init_attr *attrs)
{
@@ -735,6 +750,7 @@ int erdma_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attrs,
qp->attrs.max_send_sge = attrs->cap.max_send_sge;
qp->attrs.max_recv_sge = attrs->cap.max_recv_sge;
qp->attrs.state = ERDMA_QP_STATE_IDLE;
+ INIT_DELAYED_WORK(&qp->reflush_dwork, erdma_flush_worker);
ret = create_qp_cmd(dev, qp);
if (ret)
@@ -1028,6 +1044,8 @@ int erdma_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
erdma_modify_qp_internal(qp, &qp_attrs, ERDMA_QP_ATTR_STATE);
up_write(&qp->state_lock);
+ cancel_delayed_work_sync(&qp->reflush_dwork);
+
erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA,
CMDQ_OPCODE_DESTROY_QP);
req.qpn = QP_ID(qp);
diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.h b/drivers/infiniband/hw/erdma/erdma_verbs.h
index a5574f0252bb..9f341d032069 100644
--- a/drivers/infiniband/hw/erdma/erdma_verbs.h
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.h
@@ -197,6 +197,8 @@ struct erdma_qp {
struct erdma_cep *cep;
struct rw_semaphore state_lock;
+ struct delayed_work reflush_dwork;
+
union {
struct erdma_kqp kern_qp;
struct erdma_uqp user_qp;
--
2.27.0
