]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
net/mlx5e: Use partial batches in legacy RQ
authorMaxim Mikityanskiy <maximmi@nvidia.com>
Fri, 30 Sep 2022 16:28:52 +0000 (09:28 -0700)
committerJakub Kicinski <kuba@kernel.org>
Sat, 1 Oct 2022 20:30:19 +0000 (13:30 -0700)
commit42847fed55523bebb712bfd7e2c4616db00c3aef
tree26db39c182c111ad43e86442e3f9ec2a59da33b8
parent5758c3145b88aa9d0919681a9d3edf39353f1dbd
net/mlx5e: Use partial batches in legacy RQ

Legacy RQ allocates WQEs in batches. If the batch allocation fails, the
pages of the allocated part are released. This commit changes this
behavior to allow to use the pages that have been already allocated.

After this change, we need to be careful about indexing rq->wqe.frags[].
The WQ size is a power of two that divides by wqe_bulk (8), and the old
code used whole bulks, which allowed to use indices [8*K; 8*K+7] without
overflowing. Now that the bulks may be partial, the range can start at
any location (not only at 8*K), so we need to wrap them around to avoid
out-of-bounds array access.

Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c