Commit db3010bb authored by Saeed Mahameed's avatar Saeed Mahameed Committed by Jakub Kicinski
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net/mlx5e: Add support for UNREADABLE netmem page pools 



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.

The patch also enables the use of a separate page pool for headers when
a memory provider is installed for the queue, otherwise the same common
page pool continues to be used.

Signed-off-by: default avatarSaeed Mahameed <saeedm@nvidia.com>
Reviewed-by: default avatarDragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: default avatarTariq Toukan <tariqt@nvidia.com>
Reviewed-by: default avatarMina Almasry <almasrymina@google.com>
Signed-off-by: default avatarMark Bloch <mbloch@nvidia.com>
Link: https://patch.msgid.link/20250616141441.1243044-10-mbloch@nvidia.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent d1668f11

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

+8 −1
Original line number Diff line number Diff line
@@ -749,7 +749,9 @@ static void mlx5e_rq_shampo_hd_info_free(struct mlx5e_rq *rq) 


static bool mlx5_rq_needs_separate_hd_pool(struct mlx5e_rq *rq)

{

	return false;

	struct netdev_rx_queue *rxq = __netif_get_rx_queue(rq->netdev, rq->ix);



	return !!rxq->mp_params.mp_ops;

}



static int mlx5_rq_shampo_alloc(struct mlx5_core_dev *mdev,
@@ -964,6 +966,11 @@ 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 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