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RDMA/mlx5: Remove second user copy in create_user_qp 

Combine copy_from_user() from create_user_qp() and general code.

Link: https://lore.kernel.org/r/20200427154636.381474-24-leon@kernel.org
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Leon Romanovsky 2020-04-27 18:46:23 +03:00 committed by Jason Gunthorpe
parent 5ce0592b0e
commit 76883a6cc1
1 changed files with 15 additions and 19 deletions
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34
drivers/infiniband/hw/mlx5/qp.c
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@ -914,13 +914,12 @@ static int adjust_bfregn(struct mlx5_ib_dev *dev,
static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
struct mlx5_ib_qp *qp, struct ib_udata *udata,
struct ib_qp_init_attr *attr,
u32 **in,
struct ib_qp_init_attr *attr, u32 **in,
struct mlx5_ib_create_qp_resp *resp, int *inlen,
struct mlx5_ib_qp_base *base)
struct mlx5_ib_qp_base *base,
struct mlx5_ib_create_qp *ucmd)
{
struct mlx5_ib_ucontext *context;
struct mlx5_ib_create_qp ucmd;
struct mlx5_ib_ubuffer *ubuffer = &base->ubuffer;
int page_shift = 0;
int uar_index = 0;
@ -934,24 +933,18 @@ static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
u16 uid;
u32 uar_flags;
err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
if (err) {
mlx5_ib_dbg(dev, "copy failed\n");
return err;
}
context = rdma_udata_to_drv_context(udata, struct mlx5_ib_ucontext,
ibucontext);
uar_flags = ucmd.flags & (MLX5_QP_FLAG_UAR_PAGE_INDEX |
MLX5_QP_FLAG_BFREG_INDEX);
uar_flags = qp->flags_en &
(MLX5_QP_FLAG_UAR_PAGE_INDEX | MLX5_QP_FLAG_BFREG_INDEX);
switch (uar_flags) {
case MLX5_QP_FLAG_UAR_PAGE_INDEX:
uar_index = ucmd.bfreg_index;
uar_index = ucmd->bfreg_index;
bfregn = MLX5_IB_INVALID_BFREG;
break;
case MLX5_QP_FLAG_BFREG_INDEX:
uar_index = bfregn_to_uar_index(dev, &context->bfregi,
ucmd.bfreg_index, true);
ucmd->bfreg_index, true);
if (uar_index < 0)
return uar_index;
bfregn = MLX5_IB_INVALID_BFREG;
@ -976,12 +969,12 @@ static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
qp->sq.wqe_shift = ilog2(MLX5_SEND_WQE_BB);
qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift;
err = set_user_buf_size(dev, qp, &ucmd, base, attr);
err = set_user_buf_size(dev, qp, ucmd, base, attr);
if (err)
goto err_bfreg;
if (ucmd.buf_addr && ubuffer->buf_size) {
ubuffer->buf_addr = ucmd.buf_addr;
if (ucmd->buf_addr && ubuffer->buf_size) {
ubuffer->buf_addr = ucmd->buf_addr;
err = mlx5_ib_umem_get(dev, udata, ubuffer->buf_addr,
ubuffer->buf_size, &ubuffer->umem,
&npages, &page_shift, &ncont, &offset);
@ -1018,7 +1011,7 @@ static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
resp->bfreg_index = MLX5_IB_INVALID_BFREG;
qp->bfregn = bfregn;
err = mlx5_ib_db_map_user(context, udata, ucmd.db_addr, &qp->db);
err = mlx5_ib_db_map_user(context, udata, ucmd->db_addr, &qp->db);
if (err) {
mlx5_ib_dbg(dev, "map failed\n");
goto err_free;
@ -1991,7 +1984,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
return -EINVAL;
}
err = create_user_qp(dev, pd, qp, udata, init_attr, &in,
&resp, &inlen, base);
&resp, &inlen, base, ucmd);
if (err)
mlx5_ib_dbg(dev, "err %d\n", err);
} else {
@ -2550,6 +2543,9 @@ static int process_vendor_flags(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
MLX5_QP_FLAG_PACKET_BASED_CREDIT_MODE,
MLX5_CAP_GEN(mdev, qp_packet_based), qp);
process_vendor_flag(dev, &flags, MLX5_QP_FLAG_BFREG_INDEX, true, qp);
process_vendor_flag(dev, &flags, MLX5_QP_FLAG_UAR_PAGE_INDEX, true, qp);
if (flags)
mlx5_ib_dbg(dev, "udata has unsupported flags 0x%X\n", flags);