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| author | Mina Almasry <almasrymina@google.com> | 2024-06-28 02:32:42 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-07-03 03:59:33 +0200 |
| commit | 4dec64c52e24c2c9a15f81c115f1be5ea35121cb (patch) | |
| tree | e4c931a880a9dbff96ccc9f2757631f3f0a55cae /net/core/skbuff.c | |
| parent | Merge branch 'fixes-for-stm32-dwmac-driver-fails-to-probe' (diff) | |
| download | linux-4dec64c52e24c2c9a15f81c115f1be5ea35121cb.tar.xz linux-4dec64c52e24c2c9a15f81c115f1be5ea35121cb.zip | |
page_pool: convert to use netmem
Abstract the memory type from the page_pool so we can later add support
for new memory types. Convert the page_pool to use the new netmem type
abstraction, rather than use struct page directly.
As of this patch the netmem type is a no-op abstraction: it's always a
struct page underneath. All the page pool internals are converted to
use struct netmem instead of struct page, and the page pool now exports
2 APIs:
1. The existing struct page API.
2. The new struct netmem API.
Keeping the existing API is transitional; we do not want to refactor all
the current drivers using the page pool at once.
The netmem abstraction is currently a no-op. The page_pool uses
page_to_netmem() to convert allocated pages to netmem, and uses
netmem_to_page() to convert the netmem back to pages to pass to mm APIs,
Follow up patches to this series add non-paged netmem support to the
page_pool. This change is factored out on its own to limit the code
churn to this 1 patch, for ease of code review.
Signed-off-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://patch.msgid.link/20240628003253.1694510-6-almasrymina@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/core/skbuff.c')
| -rw-r--r-- | net/core/skbuff.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 0ed4d00d258c..83f8cd8aa2d1 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1015,8 +1015,10 @@ int skb_cow_data_for_xdp(struct page_pool *pool, struct sk_buff **pskb, EXPORT_SYMBOL(skb_cow_data_for_xdp); #if IS_ENABLED(CONFIG_PAGE_POOL) -bool napi_pp_put_page(struct page *page) +bool napi_pp_put_page(netmem_ref netmem) { + struct page *page = netmem_to_page(netmem); + page = compound_head(page); /* page->pp_magic is OR'ed with PP_SIGNATURE after the allocation @@ -1029,7 +1031,7 @@ bool napi_pp_put_page(struct page *page) if (unlikely(!is_pp_page(page))) return false; - page_pool_put_full_page(page->pp, page, false); + page_pool_put_full_netmem(page->pp, page_to_netmem(page), false); return true; } @@ -1040,7 +1042,7 @@ static bool skb_pp_recycle(struct sk_buff *skb, void *data) { if (!IS_ENABLED(CONFIG_PAGE_POOL) || !skb->pp_recycle) return false; - return napi_pp_put_page(virt_to_page(data)); + return napi_pp_put_page(page_to_netmem(virt_to_page(data))); } /** |