From 69ad0e7fe8452a6bc9b619e3f76a77f19d9687ab Mon Sep 17 00:00:00 2001 From: "Kalderon, Michal" Date: Wed, 26 Jul 2017 14:41:57 +0300 Subject: RDMA/qedr: Add support for iWARP in user space Pass the second doorbell offset to userspace in create_qp response. Pbl allocation is different for RoCE and iWARP and requires different handling. RoCE allocated the pbl and passes the pointer to qed, where-as in iWARP, qed allocates the pbl and qedr populates it after it returns Signed-off-by: Michal Kalderon Signed-off-by: Ram Amrani Signed-off-by: Ariel Elior Signed-off-by: Doug Ledford --- drivers/infiniband/hw/qedr/verbs.c | 80 ++++++++++++++++++++++++++++++-------- 1 file changed, 63 insertions(+), 17 deletions(-) (limited to 'drivers/infiniband/hw/qedr/verbs.c') diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c index 1e8799c79d85..1c995c6da8d8 100644 --- a/drivers/infiniband/hw/qedr/verbs.c +++ b/drivers/infiniband/hw/qedr/verbs.c @@ -786,7 +786,8 @@ static inline int qedr_init_user_queue(struct ib_ucontext *ib_ctx, struct qedr_dev *dev, struct qedr_userq *q, u64 buf_addr, size_t buf_len, - int access, int dmasync) + int access, int dmasync, + int alloc_and_init) { u32 fw_pages; int rc; @@ -807,19 +808,25 @@ static inline int qedr_init_user_queue(struct ib_ucontext *ib_ctx, if (rc) goto err0; - q->pbl_tbl = qedr_alloc_pbl_tbl(dev, &q->pbl_info, GFP_KERNEL); - if (IS_ERR(q->pbl_tbl)) { - rc = PTR_ERR(q->pbl_tbl); - goto err0; - } - + if (alloc_and_init) { + q->pbl_tbl = qedr_alloc_pbl_tbl(dev, &q->pbl_info, GFP_KERNEL); + if (IS_ERR(q->pbl_tbl)) { + rc = PTR_ERR(q->pbl_tbl); + goto err0; + } qedr_populate_pbls(dev, q->umem, q->pbl_tbl, &q->pbl_info, FW_PAGE_SHIFT); + } else { + q->pbl_tbl = kzalloc(sizeof(*q->pbl_tbl), GFP_KERNEL); + if (!q->pbl_tbl) + goto err0; + } return 0; err0: ib_umem_release(q->umem); + q->umem = NULL; return rc; } @@ -945,7 +952,8 @@ struct ib_cq *qedr_create_cq(struct ib_device *ibdev, cq->cq_type = QEDR_CQ_TYPE_USER; rc = qedr_init_user_queue(ib_ctx, dev, &cq->q, ureq.addr, - ureq.len, IB_ACCESS_LOCAL_WRITE, 1); + ureq.len, IB_ACCESS_LOCAL_WRITE, + 1, 1); if (rc) goto err0; @@ -1238,18 +1246,34 @@ static int qedr_check_qp_attrs(struct ib_pd *ibpd, struct qedr_dev *dev, return 0; } -static void qedr_copy_rq_uresp(struct qedr_create_qp_uresp *uresp, +static void qedr_copy_rq_uresp(struct qedr_dev *dev, + struct qedr_create_qp_uresp *uresp, struct qedr_qp *qp) { - uresp->rq_db_offset = DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_ROCE_RQ_PROD); + /* iWARP requires two doorbells per RQ. */ + if (rdma_protocol_iwarp(&dev->ibdev, 1)) { + uresp->rq_db_offset = + DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_IWARP_RQ_PROD); + uresp->rq_db2_offset = DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_FLAGS); + } else { + uresp->rq_db_offset = + DB_ADDR_SHIFT(DQ_PWM_OFFSET_TCM_ROCE_RQ_PROD); + } + uresp->rq_icid = qp->icid; } -static void qedr_copy_sq_uresp(struct qedr_create_qp_uresp *uresp, +static void qedr_copy_sq_uresp(struct qedr_dev *dev, + struct qedr_create_qp_uresp *uresp, struct qedr_qp *qp) { uresp->sq_db_offset = DB_ADDR_SHIFT(DQ_PWM_OFFSET_XCM_RDMA_SQ_PROD); - uresp->sq_icid = qp->icid + 1; + + /* iWARP uses the same cid for rq and sq */ + if (rdma_protocol_iwarp(&dev->ibdev, 1)) + uresp->sq_icid = qp->icid; + else + uresp->sq_icid = qp->icid + 1; } static int qedr_copy_qp_uresp(struct qedr_dev *dev, @@ -1259,8 +1283,8 @@ static int qedr_copy_qp_uresp(struct qedr_dev *dev, int rc; memset(&uresp, 0, sizeof(uresp)); - qedr_copy_sq_uresp(&uresp, qp); - qedr_copy_rq_uresp(&uresp, qp); + qedr_copy_sq_uresp(dev, &uresp, qp); + qedr_copy_rq_uresp(dev, &uresp, qp); uresp.atomic_supported = dev->atomic_cap != IB_ATOMIC_NONE; uresp.qp_id = qp->qp_id; @@ -1378,6 +1402,25 @@ static void qedr_idr_remove(struct qedr_dev *dev, u32 id) idr_remove(&dev->qpidr, id); spin_unlock_irq(&dev->idr_lock); } + +static inline void +qedr_iwarp_populate_user_qp(struct qedr_dev *dev, + struct qedr_qp *qp, + struct qed_rdma_create_qp_out_params *out_params) +{ + qp->usq.pbl_tbl->va = out_params->sq_pbl_virt; + qp->usq.pbl_tbl->pa = out_params->sq_pbl_phys; + + qedr_populate_pbls(dev, qp->usq.umem, qp->usq.pbl_tbl, + &qp->usq.pbl_info, FW_PAGE_SHIFT); + + qp->urq.pbl_tbl->va = out_params->rq_pbl_virt; + qp->urq.pbl_tbl->pa = out_params->rq_pbl_phys; + + qedr_populate_pbls(dev, qp->urq.umem, qp->urq.pbl_tbl, + &qp->urq.pbl_info, FW_PAGE_SHIFT); +} + static void qedr_cleanup_user(struct qedr_dev *dev, struct qedr_qp *qp) { if (qp->usq.umem) @@ -1401,6 +1444,7 @@ static int qedr_create_user_qp(struct qedr_dev *dev, struct ib_ucontext *ib_ctx = NULL; struct qedr_ucontext *ctx = NULL; struct qedr_create_qp_ureq ureq; + int alloc_and_init = rdma_protocol_roce(&dev->ibdev, 1); int rc = -EINVAL; ib_ctx = ibpd->uobject->context; @@ -1415,14 +1459,13 @@ static int qedr_create_user_qp(struct qedr_dev *dev, /* SQ - read access only (0), dma sync not required (0) */ rc = qedr_init_user_queue(ib_ctx, dev, &qp->usq, ureq.sq_addr, - ureq.sq_len, 0, 0); + ureq.sq_len, 0, 0, alloc_and_init); if (rc) return rc; /* RQ - read access only (0), dma sync not required (0) */ rc = qedr_init_user_queue(ib_ctx, dev, &qp->urq, ureq.rq_addr, - ureq.rq_len, 0, 0); - + ureq.rq_len, 0, 0, alloc_and_init); if (rc) return rc; @@ -1443,6 +1486,9 @@ static int qedr_create_user_qp(struct qedr_dev *dev, goto err1; } + if (rdma_protocol_iwarp(&dev->ibdev, 1)) + qedr_iwarp_populate_user_qp(dev, qp, &out_params); + qp->qp_id = out_params.qp_id; qp->icid = out_params.icid; -- cgit v1.2.3-59-g8ed1b