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| author | Taehee Yoo <ap420073@gmail.com> | 2025-04-15 05:24:58 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-04-16 18:17:57 -0700 |
| commit | cd1fafe7da1f6f2aa25723e317f6e8e9d0c050a1 (patch) | |
| tree | ffdd3ab16f6d80269e69a537a6c265a8f765cba9 /include/net | |
| parent | net: lan743x: Allocate rings outside ZONE_DMA (diff) | |
| download | linux-cd1fafe7da1f6f2aa25723e317f6e8e9d0c050a1.tar.gz linux-cd1fafe7da1f6f2aa25723e317f6e8e9d0c050a1.zip | |
eth: bnxt: add support rx side device memory TCP
Currently, bnxt_en driver satisfies the requirements of the Device
memory TCP, which is HDS.
So, it implements rx-side Device memory TCP for bnxt_en driver.
It requires only converting the page API to netmem API.
`struct page` of agg rings are changed to `netmem_ref netmem` and
corresponding functions are changed to a variant of netmem API.
It also passes PP_FLAG_ALLOW_UNREADABLE_NETMEM flag to a parameter of
page_pool.
The netmem will be activated only when a user requests devmem TCP.
When netmem is activated, received data is unreadable and netmem is
disabled, received data is readable.
But drivers don't need to handle both cases because netmem core API will
handle it properly.
So, using proper netmem API is enough for drivers.
Device memory TCP can be tested with
tools/testing/selftests/drivers/net/hw/ncdevmem.
This is tested with BCM57504-N425G and firmware version 232.0.155.8/pkg
232.1.132.8.
Reviewed-by: Mina Almasry <almasrymina@google.com>
Tested-by: David Wei <dw@davidwei.uk>
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Link: https://patch.msgid.link/20250415052458.1260575-1-ap420073@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/page_pool/helpers.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/net/page_pool/helpers.h b/include/net/page_pool/helpers.h index 582a3d00cbe2..93f2c31baf9b 100644 --- a/include/net/page_pool/helpers.h +++ b/include/net/page_pool/helpers.h @@ -395,6 +395,12 @@ static inline void page_pool_recycle_direct(struct page_pool *pool, page_pool_put_full_page(pool, page, true); } +static inline void page_pool_recycle_direct_netmem(struct page_pool *pool, + netmem_ref netmem) +{ + page_pool_put_full_netmem(pool, netmem, true); +} + #define PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA \ (sizeof(dma_addr_t) > sizeof(unsigned long)) @@ -492,4 +498,9 @@ static inline void page_pool_nid_changed(struct page_pool *pool, int new_nid) page_pool_update_nid(pool, new_nid); } +static inline bool page_pool_is_unreadable(struct page_pool *pool) +{ + return !!pool->mp_ops; +} + #endif /* _NET_PAGE_POOL_HELPERS_H */ |