diff options
| author | Jakub Kicinski <kuba@kernel.org> | 2023-08-02 09:18:21 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-08-03 09:54:24 -0700 |
| commit | 82e896d992fa631cda1f63239fd47b3ab781ffa6 (patch) | |
| tree | eb2846b4d8f4ac98f3aa034fd2da3faf52957bab /net/core/page_pool.c | |
| parent | e70380650a32e4ccb0bd8a2d7b54e1e4a35b39ba (diff) | |
docs: net: page_pool: use kdoc to avoid duplicating the information
All struct members of the driver-facing APIs are documented twice,
in the code and under Documentation. This is a bit tedious.
I also get the feeling that a lot of developers will read the header
when coding, rather than the doc. Bring the two a little closer
together by using kdoc for structs and functions.
Using kdoc also gives us links (mentioning a function or struct
in the text gets replaced by a link to its doc).
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Link: https://lore.kernel.org/r/20230802161821.3621985-3-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/core/page_pool.c')
| -rw-r--r-- | net/core/page_pool.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 7ca456bfab71..5d615a169718 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -58,6 +58,17 @@ static const char pp_stats[][ETH_GSTRING_LEN] = { "rx_pp_recycle_released_ref", }; +/** + * page_pool_get_stats() - fetch page pool stats + * @pool: pool from which page was allocated + * @stats: struct page_pool_stats to fill in + * + * Retrieve statistics about the page_pool. This API is only available + * if the kernel has been configured with ``CONFIG_PAGE_POOL_STATS=y``. + * A pointer to a caller allocated struct page_pool_stats structure + * is passed to this API which is filled in. The caller can then report + * those stats to the user (perhaps via ethtool, debugfs, etc.). + */ bool page_pool_get_stats(struct page_pool *pool, struct page_pool_stats *stats) { @@ -224,6 +235,10 @@ static int page_pool_init(struct page_pool *pool, return 0; } +/** + * page_pool_create() - create a page pool. + * @params: parameters, see struct page_pool_params + */ struct page_pool *page_pool_create(const struct page_pool_params *params) { struct page_pool *pool; @@ -626,7 +641,21 @@ void page_pool_put_defragged_page(struct page_pool *pool, struct page *page, } EXPORT_SYMBOL(page_pool_put_defragged_page); -/* Caller must not use data area after call, as this function overwrites it */ +/** + * page_pool_put_page_bulk() - release references on multiple pages + * @pool: pool from which pages were allocated + * @data: array holding page pointers + * @count: number of pages in @data + * + * Tries to refill a number of pages into the ptr_ring cache holding ptr_ring + * producer lock. If the ptr_ring is full, page_pool_put_page_bulk() + * will release leftover pages to the page allocator. + * page_pool_put_page_bulk() is suitable to be run inside the driver NAPI tx + * completion loop for the XDP_REDIRECT use case. + * + * Please note the caller must not use data area after running + * page_pool_put_page_bulk(), as this function overwrites it. + */ void page_pool_put_page_bulk(struct page_pool *pool, void **data, int count) { |