From b1383aa64121778d9419cc982e387e27d9e96c64 Mon Sep 17 00:00:00 2001 From: Noa Osherovich Date: Sun, 29 Oct 2017 13:59:45 +0200 Subject: [PATCH] IB/mlx5: Add PCI write end padding support Add the PCI write end padding flag to device_cap_flags enum and set it during mlx5_ib_query_device so it will be reported to user-space. During WQ/QP creation, set that capability for WQ/QP if user requested it and HW supports it. PCI write end padding modification is not supported for now. There's no such flag for a QP but for a WQ, create and modify use the same flag. Return an error if PCI write end padding flag is set during modify_wq. Signed-off-by: Noa Osherovich Reviewed-by: Majd Dibbiny Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/hw/mlx5/main.c | 3 +++ drivers/infiniband/hw/mlx5/mlx5_ib.h | 3 ++- drivers/infiniband/hw/mlx5/qp.c | 36 +++++++++++++++++++++++++--- 3 files changed, 38 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 260f8be1d0ed..e5f8d5d1cd7e 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -715,6 +715,9 @@ static int mlx5_ib_query_device(struct ib_device *ibdev, if (mlx5_get_flow_namespace(dev->mdev, MLX5_FLOW_NAMESPACE_BYPASS)) props->device_cap_flags |= IB_DEVICE_MANAGED_FLOW_STEERING; + if (MLX5_CAP_GEN(mdev, end_pad)) + props->device_cap_flags |= IB_DEVICE_PCI_WRITE_END_PADDING; + props->vendor_part_id = mdev->pdev->device; props->hw_ver = mdev->pdev->revision; diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h index 0a328d6c6494..6dd8cac78de2 100644 --- a/drivers/infiniband/hw/mlx5/mlx5_ib.h +++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h @@ -228,6 +228,7 @@ struct wr_list { enum mlx5_ib_rq_flags { MLX5_IB_RQ_CVLAN_STRIPPING = 1 << 0, + MLX5_IB_RQ_PCI_WRITE_END_PADDING = 1 << 1, }; struct mlx5_ib_wq { @@ -421,7 +422,7 @@ enum mlx5_ib_qp_flags { MLX5_IB_QP_RSS = 1 << 8, MLX5_IB_QP_CVLAN_STRIPPING = 1 << 9, MLX5_IB_QP_UNDERLAY = 1 << 10, - /* Reserved for PCI_WRITE_PAD = 1 << 11, */ + MLX5_IB_QP_PCI_WRITE_END_PADDING = 1 << 11, MLX5_IB_QP_TUNNEL_OFFLOAD = 1 << 12, }; diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c index 9e22dead259a..74799c7bd256 100644 --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -1178,8 +1178,8 @@ static int create_raw_packet_qp_rq(struct mlx5_ib_dev *dev, wq = MLX5_ADDR_OF(rqc, rqc, wq); MLX5_SET(wq, wq, wq_type, MLX5_WQ_TYPE_CYCLIC); - MLX5_SET(wq, wq, end_padding_mode, - MLX5_GET(qpc, qpc, end_padding_mode)); + if (rq->flags & MLX5_IB_RQ_PCI_WRITE_END_PADDING) + MLX5_SET(wq, wq, end_padding_mode, MLX5_WQ_END_PAD_MODE_ALIGN); MLX5_SET(wq, wq, page_offset, MLX5_GET(qpc, qpc, page_offset)); MLX5_SET(wq, wq, pd, MLX5_GET(qpc, qpc, pd)); MLX5_SET64(wq, wq, dbr_addr, MLX5_GET64(qpc, qpc, dbr_addr)); @@ -1276,6 +1276,8 @@ static int create_raw_packet_qp(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp, if (qp->flags & MLX5_IB_QP_CVLAN_STRIPPING) rq->flags |= MLX5_IB_RQ_CVLAN_STRIPPING; + if (qp->flags & MLX5_IB_QP_PCI_WRITE_END_PADDING) + rq->flags |= MLX5_IB_RQ_PCI_WRITE_END_PADDING; err = create_raw_packet_qp_rq(dev, rq, in); if (err) goto err_destroy_sq; @@ -1821,6 +1823,19 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, qp->flags |= MLX5_IB_QP_LSO; } + if (init_attr->create_flags & IB_QP_CREATE_PCI_WRITE_END_PADDING) { + if (!MLX5_CAP_GEN(dev->mdev, end_pad)) { + mlx5_ib_dbg(dev, "scatter end padding is not supported\n"); + err = -EOPNOTSUPP; + goto err; + } else if (init_attr->qp_type != IB_QPT_RAW_PACKET) { + MLX5_SET(qpc, qpc, end_padding_mode, + MLX5_WQ_END_PAD_MODE_ALIGN); + } else { + qp->flags |= MLX5_IB_QP_PCI_WRITE_END_PADDING; + } + } + if (init_attr->qp_type == IB_QPT_RAW_PACKET || qp->flags & MLX5_IB_QP_UNDERLAY) { qp->raw_packet_qp.sq.ubuffer.buf_addr = ucmd.sq_buf_addr; @@ -1865,6 +1880,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, else if (qp->create_type == MLX5_QP_KERNEL) destroy_qp_kernel(dev, qp); +err: kvfree(in); return err; } @@ -4749,7 +4765,15 @@ static int create_rq(struct mlx5_ib_rwq *rwq, struct ib_pd *pd, MLX5_SET(wq, wq, wq_type, rwq->create_flags & MLX5_IB_WQ_FLAGS_STRIDING_RQ ? MLX5_WQ_TYPE_CYCLIC_STRIDING_RQ : MLX5_WQ_TYPE_CYCLIC); - MLX5_SET(wq, wq, end_padding_mode, MLX5_WQ_END_PAD_MODE_ALIGN); + if (init_attr->create_flags & IB_WQ_FLAGS_PCI_WRITE_END_PADDING) { + if (!MLX5_CAP_GEN(dev->mdev, end_pad)) { + mlx5_ib_dbg(dev, "Scatter end padding is not supported\n"); + err = -EOPNOTSUPP; + goto out; + } else { + MLX5_SET(wq, wq, end_padding_mode, MLX5_WQ_END_PAD_MODE_ALIGN); + } + } MLX5_SET(wq, wq, log_wq_stride, rwq->log_rq_stride); if (rwq->create_flags & MLX5_IB_WQ_FLAGS_STRIDING_RQ) { MLX5_SET(wq, wq, two_byte_shift_en, rwq->two_byte_shift_en); @@ -5129,6 +5153,12 @@ int mlx5_ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr, MLX5_SET(rqc, rqc, vsd, (wq_attr->flags & IB_WQ_FLAGS_CVLAN_STRIPPING) ? 0 : 1); } + + if (wq_attr->flags_mask & IB_WQ_FLAGS_PCI_WRITE_END_PADDING) { + mlx5_ib_dbg(dev, "Modifying scatter end padding is not supported\n"); + err = -EOPNOTSUPP; + goto out; + } } if (curr_wq_state == IB_WQS_RESET && wq_state == IB_WQS_RDY) { -- GitLab