net/mlx5e: SHAMPO, Drop info array

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The info array is used to store a pointer to the
dma address of the header and to the frag page. However,
this array is not really required:
- The frag page can be calculated from the header index
  frag page index = header index / headers per page.
- The dma address can be calculated through a formula:
  dma page address + header offset.

This series gets rid of the info array and uses the above
formulas instead.

The current_page_index was used in conjunction with the info array to
store page fragment indices. This variable is dropped as well.

There was no performance regression observed.

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20241107194357.683732-12-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Dragos Tatulea 2024-11-07 21:43:56 +02:00 • committed by Jakub Kicinski

parent 4f56868b71

commit 945ca432bf

3 changed files with 42 additions and 44 deletions

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3

drivers/net/ethernet/mellanox/mlx5/core/en.h

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7

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

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76

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

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