netdev - [PATCH 13/24] page_pool: Convert page_pool_dma_sync_for

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20221130220803.3657490-14-willy@infradead.org>
Date:   Wed, 30 Nov 2022 22:07:52 +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
Subject: [PATCH 13/24] page_pool: Convert page_pool_dma_sync_for_device() to take a netmem

Change all callers.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 net/core/page_pool.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index efe9f1471caa..9ef65b383b40 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -299,10 +299,10 @@ static struct netmem *__page_pool_get_cached(struct page_pool *pool)
 }
 
 static void page_pool_dma_sync_for_device(struct page_pool *pool,
-					  struct page *page,
+					  struct netmem *nmem,
 					  unsigned int dma_sync_size)
 {
-	dma_addr_t dma_addr = page_pool_get_dma_addr(page);
+	dma_addr_t dma_addr = netmem_get_dma_addr(nmem);
 
 	dma_sync_size = min(dma_sync_size, pool->p.max_len);
 	dma_sync_single_range_for_device(pool->p.dev, dma_addr,
@@ -329,7 +329,7 @@ static bool page_pool_dma_map(struct page_pool *pool, struct netmem *nmem)
 	page_pool_set_dma_addr(page, dma);
 
 	if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV)
-		page_pool_dma_sync_for_device(pool, page, pool->p.max_len);
+		page_pool_dma_sync_for_device(pool, nmem, pool->p.max_len);
 
 	return true;
 }
@@ -576,7 +576,7 @@ __page_pool_put_netmem(struct page_pool *pool, struct netmem *nmem,
 		/* Read barrier done in netmem_ref_count / READ_ONCE */
 
 		if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV)
-			page_pool_dma_sync_for_device(pool, netmem_page(nmem),
+			page_pool_dma_sync_for_device(pool, nmem,
 						      dma_sync_size);
 
 		if (allow_direct && in_serving_softirq() &&
@@ -676,6 +676,7 @@ EXPORT_SYMBOL(page_pool_put_page_bulk);
 static struct page *page_pool_drain_frag(struct page_pool *pool,
 					 struct page *page)
 {
+	struct netmem *nmem = page_netmem(page);
 	long drain_count = BIAS_MAX - pool->frag_users;
 
 	/* Some user is still using the page frag */
@@ -684,7 +685,7 @@ static struct page *page_pool_drain_frag(struct page_pool *pool,
 
 	if (page_ref_count(page) == 1 && !page_is_pfmemalloc(page)) {
 		if (pool->p.flags & PP_FLAG_DMA_SYNC_DEV)
-			page_pool_dma_sync_for_device(pool, page, -1);
+			page_pool_dma_sync_for_device(pool, nmem, -1);
 
 		return page;
 	}
-- 
2.35.1