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RDMA/mlx5: Perform check if QP creation flow is valid 

Fast check that kernel and user flows provides enough
data to create QP.

Link: https://lore.kernel.org/r/20200427154636.381474-4-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 18:46:03 +03:00 committed by Jason Gunthorpe
parent 1265d9f7a5
commit 2242cc25ce
1 changed files with 61 additions and 67 deletions
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128
drivers/infiniband/hw/mlx5/qp.c
View File

@ -1666,9 +1666,6 @@ static int create_rss_raw_qp_tir(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
size_t required_cmd_sz;
u8 lb_flag = 0;
if (init_attr->qp_type != IB_QPT_RAW_PACKET)
return -EOPNOTSUPP;
if (init_attr->create_flags || init_attr->send_cq)
return -EINVAL;
@ -2032,13 +2029,8 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
if (mlx5_st < 0)
return -EINVAL;
if (init_attr->rwq_ind_tbl) {
if (!udata)
return -ENOSYS;
err = create_rss_raw_qp_tir(dev, qp, pd, init_attr, udata);
return err;
}
if (init_attr->rwq_ind_tbl)
return create_rss_raw_qp_tir(dev, qp, pd, init_attr, udata);
if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) {
if (!MLX5_CAP_GEN(mdev, block_lb_mc)) {
@ -2565,39 +2557,6 @@ static void destroy_qp_common(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp,
destroy_qp_user(dev, &get_pd(qp)->ibpd, qp, base, udata);
}
static const char *ib_qp_type_str(enum ib_qp_type type)
{
switch (type) {
case IB_QPT_SMI:
return "IB_QPT_SMI";
case IB_QPT_GSI:
return "IB_QPT_GSI";
case IB_QPT_RC:
return "IB_QPT_RC";
case IB_QPT_UC:
return "IB_QPT_UC";
case IB_QPT_UD:
return "IB_QPT_UD";
case IB_QPT_RAW_IPV6:
return "IB_QPT_RAW_IPV6";
case IB_QPT_RAW_ETHERTYPE:
return "IB_QPT_RAW_ETHERTYPE";
case IB_QPT_XRC_INI:
return "IB_QPT_XRC_INI";
case IB_QPT_XRC_TGT:
return "IB_QPT_XRC_TGT";
case IB_QPT_RAW_PACKET:
return "IB_QPT_RAW_PACKET";
case MLX5_IB_QPT_REG_UMR:
return "MLX5_IB_QPT_REG_UMR";
case IB_QPT_DRIVER:
return "IB_QPT_DRIVER";
case IB_QPT_MAX:
default:
return "Invalid QP type";
}
}
static struct ib_qp *mlx5_ib_create_dct(struct ib_pd *pd,
struct ib_qp_init_attr *attr,
struct mlx5_ib_create_qp *ucmd,
@ -2655,9 +2614,6 @@ static int set_mlx_qp_type(struct mlx5_ib_dev *dev,
enum { MLX_QP_FLAGS = MLX5_QP_FLAG_TYPE_DCT | MLX5_QP_FLAG_TYPE_DCI };
int err;
if (!udata)
return -EINVAL;
if (udata->inlen < sizeof(*ucmd)) {
mlx5_ib_dbg(dev, "create_qp user command is smaller than expected\n");
return -EINVAL;
@ -2715,6 +2671,62 @@ out:
return -EOPNOTSUPP;
}
static int check_valid_flow(struct mlx5_ib_dev *dev, struct ib_pd *pd,
struct ib_qp_init_attr *attr,
struct ib_udata *udata)
{
struct mlx5_ib_ucontext *ucontext = rdma_udata_to_drv_context(
udata, struct mlx5_ib_ucontext, ibucontext);
if (!udata) {
/* Kernel create_qp callers */
if (attr->rwq_ind_tbl)
return -EOPNOTSUPP;
switch (attr->qp_type) {
case IB_QPT_RAW_PACKET:
case IB_QPT_DRIVER:
return -EOPNOTSUPP;
default:
return 0;
}
}
/* Userspace create_qp callers */
if (attr->qp_type == IB_QPT_RAW_PACKET && !ucontext->cqe_version) {
mlx5_ib_dbg(dev,
"Raw Packet QP is only supported for CQE version > 0\n");
return -EINVAL;
}
if (attr->qp_type != IB_QPT_RAW_PACKET && attr->rwq_ind_tbl) {
mlx5_ib_dbg(dev,
"Wrong QP type %d for the RWQ indirect table\n",
attr->qp_type);
return -EINVAL;
}
switch (attr->qp_type) {
case IB_QPT_SMI:
case MLX5_IB_QPT_HW_GSI:
case MLX5_IB_QPT_REG_UMR:
case IB_QPT_GSI:
mlx5_ib_dbg(dev, "Kernel doesn't support QP type %d\n",
attr->qp_type);
return -EINVAL;
default:
break;
}
/*
* We don't need to see this warning, it means that kernel code
* missing ib_pd. Placed here to catch developer's mistakes.
*/
WARN_ONCE(!pd && attr->qp_type != IB_QPT_XRC_TGT,
"There is a missing PD pointer assignment\n");
return 0;
}
struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *verbs_init_attr,
struct ib_udata *udata)
@ -2725,8 +2737,6 @@ struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd,
int err;
struct ib_qp_init_attr mlx_init_attr;
struct ib_qp_init_attr *init_attr = verbs_init_attr;
struct mlx5_ib_ucontext *ucontext = rdma_udata_to_drv_context(
udata, struct mlx5_ib_ucontext, ibucontext);
dev = pd ? to_mdev(pd->device) :
to_mdev(to_mxrcd(init_attr->xrcd)->ibxrcd.device);
@ -2738,25 +2748,9 @@ struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd,
return ERR_PTR(err);
}
if (pd) {
if (init_attr->qp_type == IB_QPT_RAW_PACKET) {
if (!ucontext) {
mlx5_ib_dbg(dev, "Raw Packet QP is not supported for kernel consumers\n");
return ERR_PTR(-EINVAL);
} else if (!ucontext->cqe_version) {
mlx5_ib_dbg(dev, "Raw Packet QP is only supported for CQE version > 0\n");
return ERR_PTR(-EINVAL);
}
}
} else {
/* being cautious here */
if (init_attr->qp_type != IB_QPT_XRC_TGT &&
init_attr->qp_type != MLX5_IB_QPT_REG_UMR) {
pr_warn("%s: no PD for transport %s\n", __func__,
ib_qp_type_str(init_attr->qp_type));
return ERR_PTR(-EINVAL);
}
}
err = check_valid_flow(dev, pd, init_attr, udata);
if (err)
return ERR_PTR(err);
if (init_attr->qp_type == IB_QPT_DRIVER) {
struct mlx5_ib_create_qp ucmd;