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Message-Id: <20230105214631.3939268-19-willy@infradead.org>
Date: Thu, 5 Jan 2023 21:46:25 +0000
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
To: Jesper Dangaard Brouer <hawk@...nel.org>,
Ilias Apalodimas <ilias.apalodimas@...aro.org>
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
netdev@...r.kernel.org, linux-mm@...ck.org,
Shakeel Butt <shakeelb@...gle.com>
Subject: [PATCH v2 18/24] page_pool: Convert frag_page to frag_nmem
Remove page_pool_defrag_page() and page_pool_return_page() as they have
no more callers.
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
include/net/page_pool.h | 17 ++++++---------
net/core/page_pool.c | 47 ++++++++++++++++++-----------------------
2 files changed, 26 insertions(+), 38 deletions(-)
diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index 126c04315929..a9dae4b5f2f7 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -262,7 +262,7 @@ struct page_pool {
u32 pages_state_hold_cnt;
unsigned int frag_offset;
- struct page *frag_page;
+ struct netmem *frag_nmem;
long frag_users;
#ifdef CONFIG_PAGE_POOL_STATS
@@ -334,8 +334,8 @@ static inline struct page *page_pool_dev_alloc_pages(struct page_pool *pool)
return page_pool_alloc_pages(pool, gfp);
}
-struct page *page_pool_alloc_frag(struct page_pool *pool, unsigned int *offset,
- unsigned int size, gfp_t gfp);
+struct netmem *page_pool_alloc_frag(struct page_pool *pool,
+ unsigned int *offset, unsigned int size, gfp_t gfp);
static inline struct page *page_pool_dev_alloc_frag(struct page_pool *pool,
unsigned int *offset,
@@ -343,7 +343,7 @@ static inline struct page *page_pool_dev_alloc_frag(struct page_pool *pool,
{
gfp_t gfp = (GFP_ATOMIC | __GFP_NOWARN);
- return page_pool_alloc_frag(pool, offset, size, gfp);
+ return netmem_page(page_pool_alloc_frag(pool, offset, size, gfp));
}
/* get the stored dma direction. A driver might decide to treat this locally and
@@ -399,9 +399,9 @@ void page_pool_put_defragged_netmem(struct page_pool *pool, struct netmem *nmem,
unsigned int dma_sync_size,
bool allow_direct);
-static inline void page_pool_fragment_page(struct page *page, long nr)
+static inline void page_pool_fragment_netmem(struct netmem *nmem, long nr)
{
- atomic_long_set(&page->pp_frag_count, nr);
+ atomic_long_set(&nmem->pp_frag_count, nr);
}
static inline long page_pool_defrag_netmem(struct netmem *nmem, long nr)
@@ -425,11 +425,6 @@ static inline long page_pool_defrag_netmem(struct netmem *nmem, long nr)
return ret;
}
-static inline long page_pool_defrag_page(struct page *page, long nr)
-{
- return page_pool_defrag_netmem(page_netmem(page), nr);
-}
-
static inline bool page_pool_is_last_frag(struct page_pool *pool,
struct netmem *nmem)
{
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index ddf9f2bb85f7..5624cdae1f4e 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -222,12 +222,6 @@ EXPORT_SYMBOL(page_pool_create);
static void page_pool_return_netmem(struct page_pool *pool, struct netmem *nm);
-static inline
-void page_pool_return_page(struct page_pool *pool, struct page *page)
-{
- page_pool_return_netmem(pool, page_netmem(page));
-}
-
noinline
static struct netmem *page_pool_refill_alloc_cache(struct page_pool *pool)
{
@@ -665,10 +659,9 @@ void page_pool_put_page_bulk(struct page_pool *pool, void **data,
}
EXPORT_SYMBOL(page_pool_put_page_bulk);
-static struct page *page_pool_drain_frag(struct page_pool *pool,
- struct page *page)
+static struct netmem *page_pool_drain_frag(struct page_pool *pool,
+ struct netmem *nmem)
{
- struct netmem *nmem = page_netmem(page);
long drain_count = BIAS_MAX - pool->frag_users;
/* Some user is still using the page frag */
@@ -679,7 +672,7 @@ static struct page *page_pool_drain_frag(struct page_pool *pool,
if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV)
page_pool_dma_sync_for_device(pool, nmem, -1);
- return page;
+ return nmem;
}
page_pool_return_netmem(pool, nmem);
@@ -689,22 +682,22 @@ static struct page *page_pool_drain_frag(struct page_pool *pool,
static void page_pool_free_frag(struct page_pool *pool)
{
long drain_count = BIAS_MAX - pool->frag_users;
- struct page *page = pool->frag_page;
+ struct netmem *nmem = pool->frag_nmem;
- pool->frag_page = NULL;
+ pool->frag_nmem = NULL;
- if (!page || page_pool_defrag_page(page, drain_count))
+ if (!nmem || page_pool_defrag_netmem(nmem, drain_count))
return;
- page_pool_return_page(pool, page);
+ page_pool_return_netmem(pool, nmem);
}
-struct page *page_pool_alloc_frag(struct page_pool *pool,
+struct netmem *page_pool_alloc_frag(struct page_pool *pool,
unsigned int *offset,
unsigned int size, gfp_t gfp)
{
unsigned int max_size = PAGE_SIZE << pool->p.order;
- struct page *page = pool->frag_page;
+ struct netmem *nmem = pool->frag_nmem;
if (WARN_ON(!(pool->p.flags & PP_FLAG_PAGE_FRAG) ||
size > max_size))
@@ -713,35 +706,35 @@ struct page *page_pool_alloc_frag(struct page_pool *pool,
size = ALIGN(size, dma_get_cache_alignment());
*offset = pool->frag_offset;
- if (page && *offset + size > max_size) {
- page = page_pool_drain_frag(pool, page);
- if (page) {
+ if (nmem && *offset + size > max_size) {
+ nmem = page_pool_drain_frag(pool, nmem);
+ if (nmem) {
alloc_stat_inc(pool, fast);
goto frag_reset;
}
}
- if (!page) {
- page = page_pool_alloc_pages(pool, gfp);
- if (unlikely(!page)) {
- pool->frag_page = NULL;
+ if (!nmem) {
+ nmem = page_pool_alloc_netmem(pool, gfp);
+ if (unlikely(!nmem)) {
+ pool->frag_nmem = NULL;
return NULL;
}
- pool->frag_page = page;
+ pool->frag_nmem = nmem;
frag_reset:
pool->frag_users = 1;
*offset = 0;
pool->frag_offset = size;
- page_pool_fragment_page(page, BIAS_MAX);
- return page;
+ page_pool_fragment_netmem(nmem, BIAS_MAX);
+ return nmem;
}
pool->frag_users++;
pool->frag_offset = *offset + size;
alloc_stat_inc(pool, fast);
- return page;
+ return nmem;
}
EXPORT_SYMBOL(page_pool_alloc_frag);
--
2.35.1
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