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Diffstat (limited to 'include/net/page_pool.h')
-rw-r--r--include/net/page_pool.h85
1 files changed, 41 insertions, 44 deletions
diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index 2cbcdbdec254..cfbed00ba7ee 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -34,8 +34,18 @@
#include <linux/ptr_ring.h>
#include <linux/dma-direction.h>
-#define PP_FLAG_DMA_MAP 1 /* Should page_pool do the DMA map/unmap */
-#define PP_FLAG_ALL PP_FLAG_DMA_MAP
+#define PP_FLAG_DMA_MAP BIT(0) /* Should page_pool do the DMA
+ * map/unmap
+ */
+#define PP_FLAG_DMA_SYNC_DEV BIT(1) /* If set all pages that the driver gets
+ * from page_pool will be
+ * DMA-synced-for-device according to
+ * the length provided by the device
+ * driver.
+ * Please note DMA-sync-for-CPU is still
+ * device driver responsibility
+ */
+#define PP_FLAG_ALL (PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV)
/*
* Fast allocation side cache array/stack
@@ -65,12 +75,19 @@ struct page_pool_params {
int nid; /* Numa node id to allocate from pages from */
struct device *dev; /* device, for DMA pre-mapping purposes */
enum dma_data_direction dma_dir; /* DMA mapping direction */
+ unsigned int max_len; /* max DMA sync memory size */
+ unsigned int offset; /* DMA addr offset */
};
struct page_pool {
struct page_pool_params p;
- u32 pages_state_hold_cnt;
+ struct delayed_work release_dw;
+ void (*disconnect)(void *);
+ unsigned long defer_start;
+ unsigned long defer_warn;
+
+ u32 pages_state_hold_cnt;
/*
* Data structure for allocation side
@@ -107,6 +124,8 @@ struct page_pool {
* refcnt serves purpose is to simplify drivers error handling.
*/
refcount_t user_cnt;
+
+ u64 destroy_cnt;
};
struct page *page_pool_alloc_pages(struct page_pool *pool, gfp_t gfp);
@@ -129,29 +148,23 @@ inline enum dma_data_direction page_pool_get_dma_dir(struct page_pool *pool)
struct page_pool *page_pool_create(const struct page_pool_params *params);
-void __page_pool_free(struct page_pool *pool);
-static inline void page_pool_free(struct page_pool *pool)
-{
- /* When page_pool isn't compiled-in, net/core/xdp.c doesn't
- * allow registering MEM_TYPE_PAGE_POOL, but shield linker.
- */
#ifdef CONFIG_PAGE_POOL
- __page_pool_free(pool);
-#endif
-}
-
-/* Drivers use this instead of page_pool_free */
+void page_pool_destroy(struct page_pool *pool);
+void page_pool_use_xdp_mem(struct page_pool *pool, void (*disconnect)(void *));
+#else
static inline void page_pool_destroy(struct page_pool *pool)
{
- if (!pool)
- return;
+}
- page_pool_free(pool);
+static inline void page_pool_use_xdp_mem(struct page_pool *pool,
+ void (*disconnect)(void *))
+{
}
+#endif
/* Never call this directly, use helpers below */
-void __page_pool_put_page(struct page_pool *pool,
- struct page *page, bool allow_direct);
+void __page_pool_put_page(struct page_pool *pool, struct page *page,
+ unsigned int dma_sync_size, bool allow_direct);
static inline void page_pool_put_page(struct page_pool *pool,
struct page *page, bool allow_direct)
@@ -160,32 +173,14 @@ static inline void page_pool_put_page(struct page_pool *pool,
* allow registering MEM_TYPE_PAGE_POOL, but shield linker.
*/
#ifdef CONFIG_PAGE_POOL
- __page_pool_put_page(pool, page, allow_direct);
+ __page_pool_put_page(pool, page, -1, allow_direct);
#endif
}
/* Very limited use-cases allow recycle direct */
static inline void page_pool_recycle_direct(struct page_pool *pool,
struct page *page)
{
- __page_pool_put_page(pool, page, true);
-}
-
-/* API user MUST have disconnected alloc-side (not allowed to call
- * page_pool_alloc_pages()) before calling this. The free-side can
- * still run concurrently, to handle in-flight packet-pages.
- *
- * A request to shutdown can fail (with false) if there are still
- * in-flight packet-pages.
- */
-bool __page_pool_request_shutdown(struct page_pool *pool);
-static inline bool page_pool_request_shutdown(struct page_pool *pool)
-{
- bool safe_to_remove = false;
-
-#ifdef CONFIG_PAGE_POOL
- safe_to_remove = __page_pool_request_shutdown(pool);
-#endif
- return safe_to_remove;
+ __page_pool_put_page(pool, page, -1, true);
}
/* Disconnects a page (from a page_pool). API users can have a need
@@ -216,14 +211,16 @@ static inline bool is_page_pool_compiled_in(void)
#endif
}
-static inline void page_pool_get(struct page_pool *pool)
-{
- refcount_inc(&pool->user_cnt);
-}
-
static inline bool page_pool_put(struct page_pool *pool)
{
return refcount_dec_and_test(&pool->user_cnt);
}
+/* Caller must provide appropriate safe context, e.g. NAPI. */
+void page_pool_update_nid(struct page_pool *pool, int new_nid);
+static inline void page_pool_nid_changed(struct page_pool *pool, int new_nid)
+{
+ if (unlikely(pool->p.nid != new_nid))
+ page_pool_update_nid(pool, new_nid);
+}
#endif /* _NET_PAGE_POOL_H */