Commit 2dfac92d authored by Leon Romanovsky's avatar Leon Romanovsky Committed by Jason Gunthorpe
Browse files

RDMA/mlx5: Remove second copy from user for non RSS RAW QPs 

Change the common code to use already copied user command buffer.

Link: https://lore.kernel.org/r/20200427154636.381474-12-leon@kernel.org


Reviewed-by: default avatarMaor Gottlieb <maorg@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 2fdddbd5

drivers/infiniband/hw/mlx5/qp.c

+27 −29
Original line number Diff line number Diff line
@@ -1967,6 +1967,7 @@ static inline bool check_flags_mask(uint64_t input, uint64_t supported) 


static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,

			    struct ib_qp_init_attr *init_attr,

			    struct mlx5_ib_create_qp *ucmd,

			    struct ib_udata *udata, struct mlx5_ib_qp *qp)

{

	struct mlx5_ib_resources *devr = &dev->devr;
@@ -1979,7 +1980,6 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 
	struct mlx5_ib_cq *recv_cq;

	unsigned long flags;

	u32 uidx = MLX5_IB_DEFAULT_UIDX;

	struct mlx5_ib_create_qp ucmd;

	struct mlx5_ib_qp_base *base;

	int mlx5_st;

	void *qpc;
@@ -2056,12 +2056,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 
	}



	if (udata) {

		if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) {

			mlx5_ib_dbg(dev, "copy failed\n");

			return -EFAULT;

		}



		if (!check_flags_mask(ucmd.flags,

		if (!check_flags_mask(ucmd->flags,

				      MLX5_QP_FLAG_ALLOW_SCATTER_CQE |

				      MLX5_QP_FLAG_BFREG_INDEX |

				      MLX5_QP_FLAG_PACKET_BASED_CREDIT_MODE |
@@ -2075,14 +2070,15 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 
				      MLX5_QP_FLAG_TYPE_DCT))

			return -EINVAL;



		err = get_qp_user_index(ucontext, &ucmd, udata->inlen, &uidx);

		err = get_qp_user_index(ucontext, ucmd, udata->inlen, &uidx);

		if (err)

			return err;



		qp->wq_sig = !!(ucmd.flags & MLX5_QP_FLAG_SIGNATURE);

		qp->wq_sig = !!(ucmd->flags & MLX5_QP_FLAG_SIGNATURE);

		if (MLX5_CAP_GEN(dev->mdev, sctr_data_cqe))

			qp->scat_cqe = !!(ucmd.flags & MLX5_QP_FLAG_SCATTER_CQE);

		if (ucmd.flags & MLX5_QP_FLAG_TUNNEL_OFFLOADS) {

			qp->scat_cqe =

				!!(ucmd->flags & MLX5_QP_FLAG_SCATTER_CQE);

		if (ucmd->flags & MLX5_QP_FLAG_TUNNEL_OFFLOADS) {

			if (init_attr->qp_type != IB_QPT_RAW_PACKET ||

			    !tunnel_offload_supported(mdev)) {

				mlx5_ib_dbg(dev, "Tunnel offload isn't supported\n");
@@ -2091,7 +2087,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 
			qp->flags_en |= MLX5_QP_FLAG_TUNNEL_OFFLOADS;

		}



		if (ucmd.flags & MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_UC) {

		if (ucmd->flags & MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_UC) {

			if (init_attr->qp_type != IB_QPT_RAW_PACKET) {

				mlx5_ib_dbg(dev, "Self-LB UC isn't supported\n");

				return -EOPNOTSUPP;
@@ -2099,7 +2095,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 
			qp->flags_en |= MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_UC;

		}



		if (ucmd.flags & MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_MC) {

		if (ucmd->flags & MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_MC) {

			if (init_attr->qp_type != IB_QPT_RAW_PACKET) {

				mlx5_ib_dbg(dev, "Self-LB UM isn't supported\n");

				return -EOPNOTSUPP;
@@ -2107,7 +2103,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 
			qp->flags_en |= MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_MC;

		}



		if (ucmd.flags & MLX5_QP_FLAG_PACKET_BASED_CREDIT_MODE) {

		if (ucmd->flags & MLX5_QP_FLAG_PACKET_BASED_CREDIT_MODE) {

			if (init_attr->qp_type != IB_QPT_RC ||

				!MLX5_CAP_GEN(dev->mdev, qp_packet_based)) {

				mlx5_ib_dbg(dev, "packet based credit mode isn't supported\n");
@@ -2138,8 +2134,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 
	       &qp->trans_qp.base;



	qp->has_rq = qp_has_rq(init_attr);

	err = set_rq_size(dev, &init_attr->cap, qp->has_rq,

			  qp, udata ? &ucmd : NULL);

	err = set_rq_size(dev, &init_attr->cap, qp->has_rq, qp, ucmd);

	if (err) {

		mlx5_ib_dbg(dev, "err %d\n", err);

		return err;
@@ -2149,15 +2144,16 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 
		if (udata) {

			__u32 max_wqes =

				1 << MLX5_CAP_GEN(mdev, log_max_qp_sz);

			mlx5_ib_dbg(dev, "requested sq_wqe_count (%d)\n", ucmd.sq_wqe_count);

			if (ucmd.rq_wqe_shift != qp->rq.wqe_shift ||

			    ucmd.rq_wqe_count != qp->rq.wqe_cnt) {

			mlx5_ib_dbg(dev, "requested sq_wqe_count (%d)\n",

				    ucmd->sq_wqe_count);

			if (ucmd->rq_wqe_shift != qp->rq.wqe_shift ||

			    ucmd->rq_wqe_count != qp->rq.wqe_cnt) {

				mlx5_ib_dbg(dev, "invalid rq params\n");

				return -EINVAL;

			}

			if (ucmd.sq_wqe_count > max_wqes) {

			if (ucmd->sq_wqe_count > max_wqes) {

				mlx5_ib_dbg(dev, "requested sq_wqe_count (%d) > max allowed (%d)\n",

					    ucmd.sq_wqe_count, max_wqes);

					    ucmd->sq_wqe_count, max_wqes);

				return -EINVAL;

			}

			if (init_attr->create_flags &
@@ -2225,9 +2221,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 
	}

	if (qp->scat_cqe && (qp->qp_sub_type == MLX5_IB_QPT_DCI ||

			     init_attr->qp_type == IB_QPT_RC))

		configure_requester_scat_cqe(dev, init_attr,

					     udata ? &ucmd : NULL,

					     qpc);

		configure_requester_scat_cqe(dev, init_attr, ucmd, qpc);



	if (qp->rq.wqe_cnt) {

		MLX5_SET(qpc, qpc, log_rq_stride, qp->rq.wqe_shift - 4);
@@ -2308,7 +2302,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, 


	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;

		qp->raw_packet_qp.sq.ubuffer.buf_addr = ucmd->sq_buf_addr;

		raw_packet_qp_copy_info(qp, &qp->raw_packet_qp);

		err = create_raw_packet_qp(dev, qp, in, inlen, pd, udata,

					   &resp);
@@ -2698,7 +2692,7 @@ static int create_driver_qp(struct ib_pd *pd, struct mlx5_ib_qp *qp, 
		if (attr->cap.max_recv_wr || attr->cap.max_recv_sge)

			goto out;



		ret = create_qp_common(mdev, pd, attr, udata, qp);

		ret = create_qp_common(mdev, pd, attr, ucmd, udata, qp);

		break;

	default:

		return -EINVAL;
@@ -2712,7 +2706,10 @@ static size_t process_udata_size(struct ib_qp_init_attr *attr, 
{

	size_t ucmd = sizeof(struct mlx5_ib_create_qp);



	if (attr->qp_type == IB_QPT_DRIVER)

		return (udata->inlen < ucmd) ? 0 : ucmd;



	return ucmd;

}



struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd,
@@ -2742,7 +2739,7 @@ struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd, 
	if (init_attr->qp_type == IB_QPT_GSI)

		return mlx5_ib_gsi_create_qp(pd, init_attr);



	if (udata && init_attr->qp_type == IB_QPT_DRIVER) {

	if (udata && !init_attr->rwq_ind_tbl) {

		size_t inlen =

			process_udata_size(init_attr, udata);
@@ -2772,7 +2769,8 @@ struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd, 
		err = create_driver_qp(pd, qp, init_attr, &ucmd, udata);

		break;

	default:

		err = create_qp_common(dev, pd, init_attr, udata, qp);

		err = create_qp_common(dev, pd, init_attr,

				       (udata) ? &ucmd : NULL, udata, qp);

	}

	if (err) {

		mlx5_ib_dbg(dev, "create_qp_common failed\n");

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