From mboxrd@z Thu Jan 1 00:00:00 1970 From: Devesh Sharma Subject: [PATCH rdma-core 10/11] libbnxtre: Add support for SRQ in user lib Date: Sat, 28 Jan 2017 17:13:41 -0500 Message-ID: <1485641622-30015-11-git-send-email-devesh.sharma@broadcom.com> References: <1485641622-30015-1-git-send-email-devesh.sharma@broadcom.com> Return-path: In-Reply-To: <1485641622-30015-1-git-send-email-devesh.sharma-dY08KVG/lbpWk0Htik3J/w@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Devesh Sharma , Sriharsha Basavapatna , Somnath Kotur , Selvin Xavier List-Id: linux-rdma@vger.kernel.org This patch adds support for shared receive queue. Following are the changes: - Add ABI for user/kernel information exchange. - Add function to handle SRQ ARMing and DB-ring. - Add function to create/destroy SRQ. - Add function to query/modify SRQ. - Add function to post RQE on a SRQ. Signed-off-by: Sriharsha Basavapatna Signed-off-by: Somnath Kotur Signed-off-by: Selvin Xavier Signed-off-by: Devesh Sharma --- providers/bnxtre/abi.h | 27 +++++ providers/bnxtre/db.c | 18 ++++ providers/bnxtre/main.h | 20 +++- providers/bnxtre/verbs.c | 261 +++++++++++++++++++++++++++++++++++++++++------ 4 files changed, 288 insertions(+), 38 deletions(-) diff --git a/providers/bnxtre/abi.h b/providers/bnxtre/abi.h index 451af08..e6fb9e4 100644 --- a/providers/bnxtre/abi.h +++ b/providers/bnxtre/abi.h @@ -216,6 +216,7 @@ struct bnxt_re_mr_resp { struct ibv_reg_mr_resp resp; }; +/* CQ */ struct bnxt_re_cq_req { struct ibv_create_cq cmd; __u64 cq_va; @@ -263,6 +264,7 @@ struct bnxt_re_term_cqe { __u64 rsvd1; }; +/* QP */ struct bnxt_re_qp_req { struct ibv_create_qp cmd; __u64 qpsva; @@ -354,6 +356,19 @@ struct bnxt_re_rqe { __u64 rsvd[2]; }; +/* SRQ */ +struct bnxt_re_srq_req { + struct ibv_create_srq cmd; + __u64 srqva; + __u64 srq_handle; +}; + +struct bnxt_re_srq_resp { + struct ibv_create_srq_resp resp; + __u32 srqid; + __u32 rsvd; +}; + struct bnxt_re_srqe { __u32 srq_tag; /* 20 bits are valid */ __u32 rsvd1; @@ -384,6 +399,18 @@ static inline uint32_t bnxt_re_get_rqe_hdr_sz(void) return sizeof(struct bnxt_re_brqe) + sizeof(struct bnxt_re_rqe); } +static inline uint32_t bnxt_re_get_srqe_hdr_sz(void) +{ + return sizeof(struct bnxt_re_brqe) + sizeof(struct bnxt_re_srqe); +} + +static inline uint32_t bnxt_re_get_srqe_sz(void) +{ + return sizeof(struct bnxt_re_brqe) + + sizeof(struct bnxt_re_srqe) + + BNXT_RE_MAX_INLINE_SIZE; +} + static inline uint32_t bnxt_re_get_cqe_sz(void) { return sizeof(struct bnxt_re_req_cqe) + sizeof(struct bnxt_re_bcqe); diff --git a/providers/bnxtre/db.c b/providers/bnxtre/db.c index fc22e0d..5b8b6c0 100644 --- a/providers/bnxtre/db.c +++ b/providers/bnxtre/db.c @@ -75,6 +75,24 @@ void bnxt_re_ring_sq_db(struct bnxt_re_qp *qp) bnxt_re_ring_db(qp->udpi, &hdr); } +void bnxt_re_ring_srq_db(struct bnxt_re_srq *srq) +{ + struct bnxt_re_db_hdr hdr; + + bnxt_re_init_db_hdr(&hdr, srq->srqq->tail, srq->srqid, + BNXT_RE_QUE_TYPE_SRQ); + bnxt_re_ring_db(srq->udpi, &hdr); +} + +void bnxt_re_ring_srq_arm(struct bnxt_re_srq *srq) +{ + struct bnxt_re_db_hdr hdr; + + bnxt_re_init_db_hdr(&hdr, srq->cap.srq_limit, srq->srqid, + BNXT_RE_QUE_TYPE_SRQ_ARM); + bnxt_re_ring_db(srq->udpi, &hdr); +} + void bnxt_re_ring_cq_db(struct bnxt_re_cq *cq) { struct bnxt_re_db_hdr hdr; diff --git a/providers/bnxtre/main.h b/providers/bnxtre/main.h index c9b04e1..661f5e0 100644 --- a/providers/bnxtre/main.h +++ b/providers/bnxtre/main.h @@ -75,10 +75,6 @@ struct bnxt_re_cq { uint8_t phase; }; -struct bnxt_re_srq { - struct ibv_srq ibvsrq; -}; - struct bnxt_re_wrid { struct bnxt_re_psns *psns; uint64_t wrid; @@ -95,6 +91,16 @@ struct bnxt_re_qpcap { uint8_t sqsig; }; +struct bnxt_re_srq { + struct ibv_srq ibvsrq; + struct ibv_srq_attr cap; + struct bnxt_re_queue *srqq; + struct bnxt_re_wrid *srwrid; + struct bnxt_re_dpi *udpi; + uint32_t srqid; + uint32_t pre_count; +}; + struct bnxt_re_qp { struct ibv_qp ibvqp; struct bnxt_re_queue *sqq; @@ -151,6 +157,7 @@ struct bnxt_re_context { /* DB ring functions used internally*/ void bnxt_re_ring_rq_db(struct bnxt_re_qp *qp); void bnxt_re_ring_sq_db(struct bnxt_re_qp *qp); +void bnxt_re_ring_srq_arm(struct bnxt_re_srq *srq); void bnxt_re_ring_srq_db(struct bnxt_re_srq *srq); void bnxt_re_ring_cq_db(struct bnxt_re_cq *cq); void bnxt_re_ring_cq_arm_db(struct bnxt_re_cq *cq, uint8_t aflag); @@ -182,6 +189,11 @@ static inline struct bnxt_re_qp *to_bnxt_re_qp(struct ibv_qp *ibvqp) return container_of(ibvqp, struct bnxt_re_qp, ibvqp); } +static inline struct bnxt_re_srq *to_bnxt_re_srq(struct ibv_srq *ibvsrq) +{ + return container_of(ibvsrq, struct bnxt_re_srq, ibvsrq); +} + static inline struct bnxt_re_ah *to_bnxt_re_ah(struct ibv_ah *ibvah) { return container_of(ibvah, struct bnxt_re_ah, ibvah); diff --git a/providers/bnxtre/verbs.c b/providers/bnxtre/verbs.c index 0f5fcde..41c3a5a 100644 --- a/providers/bnxtre/verbs.c +++ b/providers/bnxtre/verbs.c @@ -343,36 +343,40 @@ static uint8_t bnxt_re_poll_scqe(struct bnxt_re_qp *qp, struct ibv_wc *ibvwc, static int bnxt_re_poll_err_rcqe(struct bnxt_re_qp *qp, struct ibv_wc *ibvwc, struct bnxt_re_bcqe *hdr, void *cqe) { - struct bnxt_re_queue *rq = qp->rqq; + struct bnxt_re_queue *rq; struct bnxt_re_wrid *rwrid; struct bnxt_re_cq *rcq; struct bnxt_re_context *cntx; - uint32_t head = rq->head; uint8_t status; rcq = to_bnxt_re_cq(qp->ibvqp.recv_cq); cntx = to_bnxt_re_context(rcq->ibvcq.context); - rwrid = &qp->rwrid[head]; + if (!qp->srq) { + rq = qp->rqq; + rwrid = &qp->rwrid[rq->head]; + } else { + rq = qp->srq->srqq; + rwrid = &qp->srq->srwrid[rq->head]; + } + status = (hdr->flg_st_typ_ph >> BNXT_RE_BCQE_STATUS_SHIFT) & BNXT_RE_BCQE_STATUS_MASK; /* skip h/w flush errors */ if (status == BNXT_RE_RSP_ST_HW_FLUSH) return 0; + ibvwc->status = bnxt_re_to_ibv_wc_status(status, false); - /* TODO: Add SRQ Processing here */ - if (qp->rqq) { - ibvwc->wr_id = rwrid->wrid; - ibvwc->qp_num = qp->qpid; - ibvwc->opcode = IBV_WC_RECV; - ibvwc->byte_len = 0; - ibvwc->wc_flags = 0; - if (qp->qptyp == IBV_QPT_UD) - ibvwc->src_qp = 0; + ibvwc->wr_id = rwrid->wrid; + ibvwc->qp_num = qp->qpid; + ibvwc->opcode = IBV_WC_RECV; + ibvwc->byte_len = 0; + ibvwc->wc_flags = 0; + if (qp->qptyp == IBV_QPT_UD) + ibvwc->src_qp = 0; + bnxt_re_incr_head(rq); - bnxt_re_incr_head(qp->rqq); - if (qp->qpst != IBV_QPS_ERR) - qp->qpst = IBV_QPS_ERR; + if (!qp->srq) { pthread_spin_lock(&cntx->fqlock); bnxt_re_list_add_node(&qp->rnode, &rcq->rfhead); pthread_spin_unlock(&cntx->fqlock); @@ -400,14 +404,19 @@ static void bnxt_re_poll_success_rcqe(struct bnxt_re_qp *qp, struct ibv_wc *ibvwc, struct bnxt_re_bcqe *hdr, void *cqe) { - struct bnxt_re_queue *rq = qp->rqq; + struct bnxt_re_queue *rq; struct bnxt_re_wrid *rwrid; struct bnxt_re_rc_cqe *rcqe; - uint32_t head = rq->head; uint8_t flags, is_imm, is_rdma; rcqe = cqe; - rwrid = &qp->rwrid[head]; + if (!qp->srq) { + rq = qp->rqq; + rwrid = &qp->rwrid[rq->head]; + } else { + rq = qp->srq->srqq; + rwrid = &qp->srq->srwrid[rq->head]; + } ibvwc->status = IBV_WC_SUCCESS; ibvwc->wr_id = rwrid->wrid; @@ -516,9 +525,6 @@ static int bnxt_re_poll_one(struct bnxt_re_cq *cq, int nwc, struct ibv_wc *wc) qp = (struct bnxt_re_qp *)rcqe->qp_handle; if (!qp) break; /*stale cqe. should be rung.*/ - if (qp->srq) - goto bail; /*TODO: Add SRQ poll */ - pcqe = bnxt_re_poll_rcqe(qp, wc, cqe, &cnt); break; case BNXT_RE_WC_TYPE_RECV_RAW: @@ -558,7 +564,7 @@ skipp_real: if (hw_polled) bnxt_re_ring_cq_db(cq); -bail: + return dqed; } @@ -756,9 +762,7 @@ static int bnxt_re_alloc_queue_ptr(struct bnxt_re_qp *qp, qp->sqq = calloc(1, sizeof(struct bnxt_re_queue)); if (!qp->sqq) return -ENOMEM; - if (attr->srq) - qp->srq = NULL;/*TODO: to_bnxt_re_srq(attr->srq);*/ - else { + if (!attr->srq) { qp->rqq = calloc(1, sizeof(struct bnxt_re_queue)); if (!qp->rqq) { free(qp->sqq); @@ -771,10 +775,12 @@ static int bnxt_re_alloc_queue_ptr(struct bnxt_re_qp *qp, static void bnxt_re_free_queues(struct bnxt_re_qp *qp) { - if (qp->rwrid) - free(qp->rwrid); - pthread_spin_destroy(&qp->rqq->qlock); - bnxt_re_free_aligned(qp->rqq); + if (qp->rqq) { + if (qp->rwrid) + free(qp->rwrid); + pthread_spin_destroy(&qp->rqq->qlock); + bnxt_re_free_aligned(qp->rqq); + } if (qp->swrid) free(qp->swrid); @@ -885,6 +891,8 @@ struct ibv_qp *bnxt_re_create_qp(struct ibv_pd *ibvpd, qp->qpst = IBV_QPS_RESET; qp->scq = to_bnxt_re_cq(attr->send_cq); qp->rcq = to_bnxt_re_cq(attr->recv_cq); + if (attr->srq) + qp->srq = to_bnxt_re_srq(attr->srq); qp->udpi = &cntx->udpi; /* Save/return the altered Caps. */ attr->cap.max_send_wr = cap->max_swr; @@ -1326,32 +1334,217 @@ int bnxt_re_post_recv(struct ibv_qp *ibvqp, struct ibv_recv_wr *wr, return 0; } +static void bnxt_re_srq_free_queue_ptr(struct bnxt_re_srq *srq) +{ + if (srq && srq->srqq) + free(srq->srqq); + if (srq) + free(srq); +} + +static struct bnxt_re_srq *bnxt_re_srq_alloc_queue_ptr(void) +{ + struct bnxt_re_srq *srq; + + srq = calloc(1, sizeof(struct bnxt_re_srq)); + if (!srq) + return NULL; + + srq->srqq = calloc(1, sizeof(struct bnxt_re_queue)); + if (!srq->srqq) { + free(srq); + return NULL; + } + + return srq; +} + +static void bnxt_re_srq_free_queue(struct bnxt_re_srq *srq) +{ + if (srq->srwrid) + free(srq->srwrid); + pthread_spin_destroy(&srq->srqq->qlock); + bnxt_re_free_aligned(srq->srqq); +} + +static int bnxt_re_srq_alloc_queue(struct bnxt_re_srq *srq, + struct ibv_srq_init_attr *attr, + uint32_t pg_size) +{ + struct bnxt_re_queue *que; + int ret; + + que = srq->srqq; + que->depth = roundup_pow_of_two(attr->attr.max_wr + 1); + que->stride = bnxt_re_get_srqe_sz(); + ret = bnxt_re_alloc_aligned(que, pg_size); + if (ret) + goto bail; + pthread_spin_init(&que->qlock, PTHREAD_PROCESS_PRIVATE); + /* For SRQ only bnxt_re_wrid.wrid is used. */ + srq->srwrid = calloc(que->depth, sizeof(struct bnxt_re_wrid)); + if (!srq->srwrid) { + ret = -ENOMEM; + goto bail; + } + /*TODO: update actual max depth. */ + return 0; +bail: + bnxt_re_srq_free_queue(srq); + return ret; +} + struct ibv_srq *bnxt_re_create_srq(struct ibv_pd *ibvpd, struct ibv_srq_init_attr *attr) { + struct bnxt_re_srq *srq; + struct bnxt_re_srq_req cmd; + struct bnxt_re_srq_resp resp; + struct bnxt_re_context *cntx = to_bnxt_re_context(ibvpd->context); + struct bnxt_re_dev *dev = to_bnxt_re_dev(cntx->ibvctx.device); + int ret; + + /*TODO: Check max limit on queue depth and sge.*/ + srq = bnxt_re_srq_alloc_queue_ptr(); + if (!srq) + goto fail; + + if (bnxt_re_srq_alloc_queue(srq, attr, dev->pg_size)) + goto fail; + + cmd.srqva = (uint64_t)srq->srqq->va; + cmd.srq_handle = (uint64_t)srq; + ret = ibv_cmd_create_srq(ibvpd, &srq->ibvsrq, attr, + &cmd.cmd, sizeof(cmd), + &resp.resp, sizeof(resp)); + if (ret) + goto fail; + + srq->srqid = resp.srqid; + srq->udpi = &cntx->udpi; + srq->cap.max_wr = srq->srqq->depth; + srq->cap.max_sge = attr->attr.max_sge; + srq->cap.srq_limit = attr->attr.srq_limit; + srq->pre_count = 0; + + return &srq->ibvsrq; +fail: + bnxt_re_srq_free_queue_ptr(srq); return NULL; } int bnxt_re_modify_srq(struct ibv_srq *ibvsrq, struct ibv_srq_attr *attr, - int init_attr) + int attr_mask) { - return -ENOSYS; + struct bnxt_re_srq *srq = to_bnxt_re_srq(ibvsrq); + struct ibv_modify_srq cmd; + int status = 0; + + status = ibv_cmd_modify_srq(ibvsrq, attr, attr_mask, + &cmd, sizeof(cmd)); + if (!status && ((attr_mask & IBV_SRQ_LIMIT) && + (srq->cap.srq_limit != attr->srq_limit))) { + srq->cap.srq_limit = attr->srq_limit; + } + + return status; } int bnxt_re_destroy_srq(struct ibv_srq *ibvsrq) { - return -ENOSYS; + struct bnxt_re_srq *srq = to_bnxt_re_srq(ibvsrq); + int ret; + + ret = ibv_cmd_destroy_srq(ibvsrq); + if (ret) + return ret; + bnxt_re_srq_free_queue(srq); + bnxt_re_srq_free_queue_ptr(srq); + + return 0; } int bnxt_re_query_srq(struct ibv_srq *ibvsrq, struct ibv_srq_attr *attr) { - return -ENOSYS; + struct ibv_query_srq cmd; + int status; + + status = ibv_cmd_query_srq(ibvsrq, attr, &cmd, sizeof(cmd)); + if (status) + return status; + + return 0; +} + +static int bnxt_re_build_srqe(struct bnxt_re_srq *srq, + struct ibv_recv_wr *wr, void *srqe) +{ + struct bnxt_re_brqe *hdr = srqe; + struct bnxt_re_rqe *rwr; + struct bnxt_re_sge *sge; + struct bnxt_re_wrid *wrid; + int wqe_sz, len; + + rwr = (srqe + sizeof(struct bnxt_re_brqe)); + sge = (srqe + bnxt_re_get_srqe_hdr_sz()); + wrid = &srq->srwrid[srq->srqq->tail]; + + len = bnxt_re_build_sge(sge, wr->sg_list, wr->num_sge, false); + hdr->rsv_ws_fl_wt = BNXT_RE_WR_OPCD_RECV; + wqe_sz = wr->num_sge + (bnxt_re_get_srqe_hdr_sz() >> 4); /* 16B align */ + hdr->rsv_ws_fl_wt |= ((wqe_sz & BNXT_RE_HDR_WS_MASK) << + BNXT_RE_HDR_WS_SHIFT); + rwr->wrid = srq->srqq->tail; + + /* Fill wrid */ + wrid->wrid = wr->wr_id; + wrid->bytes = len; /* N.A. for RQE */ + wrid->sig = 0; /* N.A. for RQE */ + + return len; } int bnxt_re_post_srq_recv(struct ibv_srq *ibvsrq, struct ibv_recv_wr *wr, struct ibv_recv_wr **bad) { - return -ENOSYS; + struct bnxt_re_srq *srq = to_bnxt_re_srq(ibvsrq); + struct bnxt_re_queue *rq = srq->srqq; + void *srqe; + int ret; + + pthread_spin_lock(&rq->qlock); + while (wr) { + if (bnxt_re_is_que_full(rq) || + wr->num_sge > srq->cap.max_sge) { + *bad = wr; + pthread_spin_unlock(&rq->qlock); + return ENOMEM; + } + + srqe = (void *)(rq->va + (rq->tail * rq->stride)); + memset(srqe, 0, bnxt_re_get_srqe_sz()); + ret = bnxt_re_build_srqe(srq, wr, srqe); + if (ret < 0) { + pthread_spin_unlock(&rq->qlock); + *bad = wr; + return ENOMEM; + } + + bnxt_re_host_to_le64((uint64_t *)srqe, rq->stride); + bnxt_re_incr_tail(rq); + wr = wr->next; + + wmb(); /* write barrier */ + bnxt_re_ring_srq_db(srq); + if ((srq->pre_count < srq->srqq->depth) && + (++srq->pre_count > srq->cap.srq_limit)) { + srq->pre_count = srq->srqq->depth; + bnxt_re_ring_srq_arm(srq); + } + } + pthread_spin_unlock(&rq->qlock); + + return 0; } struct ibv_ah *bnxt_re_create_ah(struct ibv_pd *ibvpd, struct ibv_ah_attr *attr) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html