From: Yishai Hadas <yishaih@xxxxxxxxxxxx>
Extend QP creation to get uar page index from user space, this mode can
be used with the UAR dynamic mode APIs to allocate/destroy a UAR object.
As part of enabling this option blocked the weird/un-supported cross
channel option which uses index 0 hard-coded.
This QP flag wasn't exposed to user space as part of any formal upstream
release, the dynamic option can allow having valid UAR page index
instead.
Signed-off-by: Yishai Hadas <yishaih@xxxxxxxxxxxx>
Reviewed-by: Michael Guralnik <michaelgur@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/qp.c | 27 +++++++++++++++++----------
include/uapi/rdma/mlx5-abi.h | 1 +
2 files changed, 18 insertions(+), 10 deletions(-)
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index cf44c5a21f18..3acdc31d75d3 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -919,6 +919,7 @@ static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
void *qpc;
int err;
u16 uid;
+ u32 uar_flags;
err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
if (err) {
@@ -928,24 +929,29 @@ static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd,
context = rdma_udata_to_drv_context(udata, struct mlx5_ib_ucontext,
ibucontext);
- if (ucmd.flags & MLX5_QP_FLAG_BFREG_INDEX) {
+ uar_flags = ucmd.flags & (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;
+ 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);
if (uar_index < 0)
return uar_index;
-
bfregn = MLX5_IB_INVALID_BFREG;
- } else if (qp->flags & MLX5_IB_QP_CROSS_CHANNEL) {
- /*
- * TBD: should come from the verbs when we have the API
- */
- /* In CROSS_CHANNEL CQ and QP must use the same UAR */
- bfregn = MLX5_CROSS_CHANNEL_BFREG;
- }
- else {
+ break;
+ case 0:
+ if (qp->flags & MLX5_IB_QP_CROSS_CHANNEL)
+ return -EINVAL;
bfregn = alloc_bfreg(dev, &context->bfregi);
if (bfregn < 0)
return bfregn;
+ break;
+ default:
+ return -EINVAL;
}
mlx5_ib_dbg(dev, "bfregn 0x%x, uar_index 0x%x\n", bfregn, uar_index);
@@ -2100,6 +2106,7 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_MC |
MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_UC |
MLX5_QP_FLAG_TUNNEL_OFFLOADS |
+ MLX5_QP_FLAG_UAR_PAGE_INDEX |
MLX5_QP_FLAG_TYPE_DCI |
MLX5_QP_FLAG_TYPE_DCT))
return -EINVAL;
diff --git a/include/uapi/rdma/mlx5-abi.h b/include/uapi/rdma/mlx5-abi.h
index e900f9a64feb..a65d60b44829 100644
--- a/include/uapi/rdma/mlx5-abi.h
+++ b/include/uapi/rdma/mlx5-abi.h
@@ -49,6 +49,7 @@ enum {
MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_MC = 1 << 7,
MLX5_QP_FLAG_ALLOW_SCATTER_CQE = 1 << 8,
MLX5_QP_FLAG_PACKET_BASED_CREDIT_MODE = 1 << 9,
+ MLX5_QP_FLAG_UAR_PAGE_INDEX = 1 << 10,
};
enum {
--
2.24.1
