diff options
| author | Byungchul Park <byungchul@sk.com> | 2025-07-21 05:18:26 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-07-24 03:46:54 +0300 |
| commit | 89ade7c7306508f46b811cd43960eaed88e0e1dd (patch) | |
| tree | 7fbbc2d65d83ab468de6c569cb9833c5dc44dc39 /drivers/net | |
| parent | 38a436d4e26487e16ac6c1de17c030b1bef84d83 (diff) | |
| download | linux-89ade7c7306508f46b811cd43960eaed88e0e1dd.tar.xz | |
netmem, mlx4: access ->pp_ref_count through netmem_desc instead of page
To eliminate the use of struct page in page pool, the page pool users
should use netmem descriptor and APIs instead.
Make mlx4 access ->pp_ref_count through netmem_desc instead of page.
While at it, add a helper, pp_page_to_nmdesc() and __pp_page_to_nmdesc(),
that can be used to get netmem_desc from page only if it's a pp page.
For now that netmem_desc overlays on page, it can be achieved by just
casting, and use macro and _Generic to cover const casting as well.
Plus, change page_pool_page_is_pp() to check for 'const struct page *'
instead of 'struct page *' since it doesn't modify data and additionally
covers const type.
Signed-off-by: Byungchul Park <byungchul@sk.com>
Link: https://patch.msgid.link/20250721021835.63939-4-byungchul@sk.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_rx.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index b33285d755b9..92a16ddb7d86 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -460,9 +460,11 @@ static int mlx4_en_complete_rx_desc(struct mlx4_en_priv *priv, truesize += frag_info->frag_stride; if (frag_info->frag_stride == PAGE_SIZE / 2) { + struct netmem_desc *desc = pp_page_to_nmdesc(page); + frags->page_offset ^= PAGE_SIZE / 2; release = page_count(page) != 1 || - atomic_long_read(&page->pp_ref_count) != 1 || + atomic_long_read(&desc->pp_ref_count) != 1 || page_is_pfmemalloc(page) || page_to_nid(page) != numa_mem_id(); } else if (!priv->rx_headroom) { |