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[net-next,09/11] net/mlx5e: Add support for UNREADABLE netmem page pools

Message ID 20250116215530.158886-10-saeed@kernel.org (mailing list archive)
State Deferred
Delegated to: Netdev Maintainers
Headers show
Series [net-next,01/11] net: Kconfig NET_DEVMEM selects GENERIC_ALLOCATOR | expand

Checks

Context Check Description
netdev/series_format success Pull request is its own cover letter
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 1 maintainers not CCed: andrew+netdev@lunn.ch
netdev/build_clang success Errors and warnings before: 1 this patch: 1
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning WARNING: line length of 82 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Saeed Mahameed Jan. 16, 2025, 9:55 p.m. UTC 
From: Saeed Mahameed <saeedm@nvidia.com>

On netdev_rx_queue_restart, a special type of page pool maybe expected.

In this patch declare support for UNREADABLE netmem iov pages in the
pool params only when header data split shampo RQ mode is enabled, also
set the queue index in the page pool params struct.

Shampo mode requirement: Without header split rx needs to peek at the data,
we can't do UNREADABLE_NETMEM.

Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 02c9737868b3..340ed7d3feac 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -946,6 +946,11 @@  static int mlx5e_alloc_rq(struct mlx5e_params *params,
 		pp_params.netdev    = rq->netdev;
 		pp_params.dma_dir   = rq->buff.map_dir;
 		pp_params.max_len   = PAGE_SIZE;
+		pp_params.queue_idx = rq->ix;
+
+		/* Shampo header data split rx path allow for unreadable netmem */
+		if (test_bit(MLX5E_RQ_STATE_SHAMPO, &rq->state))
+			pp_params.flags |= PP_FLAG_ALLOW_UNREADABLE_NETMEM;
 
 		/* page_pool can be used even when there is no rq->xdp_prog,
 		 * given page_pool does not handle DMA mapping there is no