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| author | Aharon Landau <aharonl@nvidia.com> | 2022-07-31 11:26:36 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leonro@nvidia.com> | 2022-08-16 15:21:52 +0300 |
| commit | 13ad1125b941a5f257d9d3ae70485773abd34792 (patch) | |
| tree | 2b04ccf944b5f81c6d93518d95d4c7ac996c5a23 /drivers/infiniband/hw/mlx5/main.c | |
| parent | 19d6214ad6dfffda1a5bdc2b34ea75ba45a1a60a (diff) | |
| download | linux-stable-13ad1125b941a5f257d9d3ae70485773abd34792.tar.gz linux-stable-13ad1125b941a5f257d9d3ae70485773abd34792.tar.bz2 linux-stable-13ad1125b941a5f257d9d3ae70485773abd34792.zip | |
RDMA/mlx5: Don't compare mkey tags in DEVX indirect mkey
According to the ib spec:
If the CI supports the Base Memory Management Extensions defined in this
specification, the L_Key format must consist of:
24 bit index in the most significant bits of the R_Key, and
8 bit key in the least significant bits of the R_Key
Through a successful Allocate L_Key verb invocation, the CI must let the
consumer own the key portion of the returned R_Key
Therefore, when creating a mkey using DEVX, the consumer is allowed to
change the key part. The kernel should compare only the index part of a
R_Key to determine equality with another R_Key.
Adding capability in order not to break backward compatibility.
Fixes: 534fd7aac56a ("IB/mlx5: Manage indirection mkey upon DEVX flow for ODP")
Link: https://lore.kernel.org/r/3d669aacea85a3a15c3b3b953b3eaba3f80ef9be.1659255945.git.leonro@nvidia.com
Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband/hw/mlx5/main.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index a174a0eee8dc..7c40efae96a3 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -1826,6 +1826,9 @@ static int set_ucontext_resp(struct ib_ucontext *uctx, if (MLX5_CAP_GEN(dev->mdev, drain_sigerr)) resp->comp_mask |= MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_SQD2RTS; + resp->comp_mask |= + MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_MKEY_UPDATE_TAG; + return 0; } |