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| author | Nimrod Oren <noren@nvidia.com> | 2026-04-29 23:14:29 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-05-01 19:02:07 -0700 |
| commit | fbf6f64a4322cfeb0d98f39baf8ce18246dd12c0 (patch) | |
| tree | 944eb2ffb7b2b7077f9aa8fb5976f2adbebe0127 /include/linux | |
| parent | 3b16155425af46ac89c6cc676db0ca1ec4c4ab85 (diff) | |
| download | lwn-fbf6f64a4322cfeb0d98f39baf8ce18246dd12c0.tar.gz lwn-fbf6f64a4322cfeb0d98f39baf8ce18246dd12c0.zip | |
net/mlx5: use internal dma pools for frag buf alloc
Add mlx5_dma_pool alloc/free paths, and wire mlx5_frag_buf allocation
and free paths to use them.
mlx5_frag_buf_alloc_node() now selects an mlx5_dma_pool to allocate
fragments from, instead of directly allocating full coherent pages.
mlx5_frag_buf_free() frees from the respective pool.
mlx5_dma_pool_alloc() keeps allocation fast by maintaining pages with
available indexes at the head of the list, so the common allocation path
can take a free index immediately. New backing pages are allocated only
when no free index is available.
mlx5_dma_pool_free() returns released indexes to the pool and frees a
backing page once all of its indexes become free. This avoids keeping
fully free pages for the lifetime of the pool and reduces coherent DMA
memory footprint.
Signed-off-by: Nimrod Oren <noren@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260429201429.223809-4-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mlx5/driver.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h index 71f7615ab553..531ce66fc8ef 100644 --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -343,9 +343,11 @@ struct mlx5_cmd_mailbox { struct mlx5_cmd_mailbox *next; }; +struct mlx5_dma_pool_page; struct mlx5_buf_list { void *buf; dma_addr_t map; + struct mlx5_dma_pool_page *frag_page; }; struct mlx5_frag_buf { |