From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: Jesper Dangaard Brouer <hawk@kernel.org>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
netdev@vger.kernel.org, linux-mm@kvack.org,
Shakeel Butt <shakeelb@google.com>,
Jesper Dangaard Brouer <brouer@redhat.com>,
Jesse Brandeburg <jesse.brandeburg@intel.com>
Subject: [PATCH v3 02/26] netmem: Add utility functions
Date: Wed, 11 Jan 2023 04:21:50 +0000 [thread overview]
Message-ID: <20230111042214.907030-3-willy@infradead.org> (raw)
In-Reply-To: <20230111042214.907030-1-willy@infradead.org>
netmem_page() is defined this way to preserve constness. page_netmem()
doesn't call compound_head() because netmem users always use the head
page; it does include a debugging assert to check that it's true.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
---
include/net/page_pool.h | 59 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 59 insertions(+)
diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index cbea4df54918..414907e67ff6 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -96,6 +96,65 @@ NETMEM_MATCH(_refcount, _refcount);
#undef NETMEM_MATCH
static_assert(sizeof(struct netmem) <= sizeof(struct page));
+#define netmem_page(nmem) (_Generic((nmem), \
+ const struct netmem *: (const struct page *)nmem, \
+ struct netmem *: (struct page *)nmem))
+
+static inline struct netmem *page_netmem(struct page *page)
+{
+ VM_BUG_ON_PAGE(PageTail(page), page);
+ return (struct netmem *)page;
+}
+
+static inline unsigned long netmem_pfn(const struct netmem *nmem)
+{
+ return page_to_pfn(netmem_page(nmem));
+}
+
+static inline unsigned long netmem_nid(const struct netmem *nmem)
+{
+ return page_to_nid(netmem_page(nmem));
+}
+
+static inline struct netmem *virt_to_netmem(const void *x)
+{
+ return page_netmem(virt_to_head_page(x));
+}
+
+static inline void *netmem_to_virt(const struct netmem *nmem)
+{
+ return page_to_virt(netmem_page(nmem));
+}
+
+static inline void *netmem_address(const struct netmem *nmem)
+{
+ return page_address(netmem_page(nmem));
+}
+
+static inline int netmem_ref_count(const struct netmem *nmem)
+{
+ return page_ref_count(netmem_page(nmem));
+}
+
+static inline void netmem_get(struct netmem *nmem)
+{
+ struct folio *folio = (struct folio *)nmem;
+
+ folio_get(folio);
+}
+
+static inline void netmem_put(struct netmem *nmem)
+{
+ struct folio *folio = (struct folio *)nmem;
+
+ folio_put(folio);
+}
+
+static inline bool netmem_is_pfmemalloc(const struct netmem *nmem)
+{
+ return nmem->pp_magic & BIT(1);
+}
+
/*
* Fast allocation side cache array/stack
*
--
2.35.1
next prev parent reply other threads:[~2023-01-11 4:24 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-11 4:21 [PATCH v3 00/26] Split netmem from struct page Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 01/26] netmem: Create new type Matthew Wilcox (Oracle)
2023-01-11 4:21 ` Matthew Wilcox (Oracle) [this message]
2023-01-11 4:21 ` [PATCH v3 03/26] page_pool: Add netmem_set_dma_addr() and netmem_get_dma_addr() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 04/26] page_pool: Convert page_pool_release_page() to page_pool_release_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 05/26] page_pool: Start using netmem in allocation path Matthew Wilcox (Oracle)
2023-01-12 15:36 ` Shay Agroskin
2023-01-12 20:29 ` Matthew Wilcox
2023-01-11 4:21 ` [PATCH v3 06/26] page_pool: Convert page_pool_return_page() to page_pool_return_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 07/26] page_pool: Convert __page_pool_put_page() to __page_pool_put_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 08/26] page_pool: Convert pp_alloc_cache to contain netmem Matthew Wilcox (Oracle)
2023-01-14 12:28 ` Shay Agroskin
2023-01-14 17:58 ` Matthew Wilcox
2023-01-15 11:03 ` Shay Agroskin
2023-01-11 4:21 ` [PATCH v3 09/26] page_pool: Convert page_pool_defrag_page() to page_pool_defrag_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 10/26] page_pool: Convert page_pool_put_defragged_page() to netmem Matthew Wilcox (Oracle)
2023-01-11 4:21 ` [PATCH v3 11/26] page_pool: Convert page_pool_empty_ring() to use netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 12/26] page_pool: Convert page_pool_alloc_pages() to page_pool_alloc_netmem() Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 13/26] page_pool: Convert page_pool_dma_sync_for_device() to take a netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 14/26] page_pool: Convert page_pool_recycle_in_cache() to netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 15/26] page_pool: Remove __page_pool_put_page() Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 16/26] page_pool: Use netmem in page_pool_drain_frag() Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 17/26] page_pool: Convert page_pool_return_skb_page() to use netmem Matthew Wilcox (Oracle)
2023-01-12 8:46 ` Jesper Dangaard Brouer
2023-01-11 4:22 ` [PATCH v3 18/26] page_pool: Allow page_pool_recycle_direct() to take a netmem or a page Matthew Wilcox (Oracle)
2023-01-11 12:48 ` kernel test robot
2023-01-11 13:43 ` Matthew Wilcox
2023-01-12 8:45 ` Jesper Dangaard Brouer
2023-01-11 4:22 ` [PATCH v3 19/26] page_pool: Convert frag_page to frag_nmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 20/26] xdp: Convert to netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 21/26] mm: Remove page pool members from struct page Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 22/26] page_pool: Pass a netmem to init_callback() Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 23/26] net: Add support for netmem in skb_frag Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 24/26] mvneta: Convert to netmem Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 25/26] mlx5: " Matthew Wilcox (Oracle)
2023-01-11 4:22 ` [PATCH v3 26/26] hns3: " Matthew Wilcox (Oracle)
2023-01-11 8:25 ` [PATCH v3 00/26] Split netmem from struct page Yunsheng Lin
2023-01-11 13:21 ` Matthew Wilcox
2023-01-12 2:12 ` Yunsheng Lin
2023-01-12 10:15 ` Jesper Dangaard Brouer
2023-01-13 2:19 ` Yunsheng Lin
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