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RDMA/erdma: Implement the lifecycle of reflushing work for each QP

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Each QP has a work for reflushing purpose. In the work, driver will report
the latest pi to hardware.

Link: https://lore.kernel.org/r/20221116023107.82835-3-chengyou@linux.alibaba.com
Signed-off-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Cheng Xu 2022-11-16 10:31:06 +08:00 committed by Jason Gunthorpe
parent 35765dccaf
commit 54d8fffc2a
3 changed files with 28 additions and 0 deletions
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8
drivers/infiniband/hw/erdma/erdma_hw.h
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@ -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)

18
drivers/infiniband/hw/erdma/erdma_verbs.c
View File

@ -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);

2
drivers/infiniband/hw/erdma/erdma_verbs.h
View File

@ -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;