diff mbox series

[RFC,bpf-next,12/13] xsk: explicitly inline functions and move definitions

Message ID 20200504113716.7930-13-bjorn.topel@gmail.com
State New
Headers show
Series Introduce AF_XDP buffer allocation API | expand

Commit Message

Björn Töpel May 4, 2020, 11:37 a.m. UTC 
From: Björn Töpel <bjorn.topel@intel.com>

In order to reduce the number of function calls, the struct
xsk_buff_pool definition is moved to xsk_buff_pool.h. The functions
xp_get_dma(), xp_dma_sync_for_cpu() and xp_dma_sync_for_device() are
explicitly inlined.

Further, move xp_get_handle() and xp_release() to xsk.c, to allow for
the compiler to perform inlining.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
---
 include/net/xsk_buff_pool.h | 50 ++++++++++++++++++++++++++++----
 net/xdp/xsk.c               | 15 ++++++++++
 net/xdp/xsk_buff_pool.c     | 58 ++++---------------------------------
 3 files changed, 65 insertions(+), 58 deletions(-)
diff mbox series

Patch

diff --git a/include/net/xsk_buff_pool.h b/include/net/xsk_buff_pool.h
index 9abef166441d..5c8e357b2678 100644
--- a/include/net/xsk_buff_pool.h
+++ b/include/net/xsk_buff_pool.h
@@ -24,6 +24,27 @@  struct xdp_buff_xsk {
 	struct list_head free_list_node;
 };
 
+struct xsk_buff_pool {
+	struct xsk_queue *fq;
+	struct list_head free_list;
+	dma_addr_t *dma_pages;
+	struct xdp_buff_xsk *heads;
+	u64 chunk_mask;
+	u64 addrs_cnt;
+	u32 free_list_cnt;
+	u32 dma_pages_cnt;
+	u32 heads_cnt;
+	u32 free_heads_cnt;
+	u32 headroom;
+	u32 chunk_size;
+	u32 frame_len;
+	bool cheap_dma;
+	bool unaligned;
+	void *addrs;
+	struct device *dev;
+	struct xdp_buff_xsk *free_heads[];
+};
+
 /* AF_XDP core. */
 struct xsk_buff_pool *xp_create(struct page **pages, u32 nr_pages, u32 chunks,
 				u32 chunk_size, u32 headroom, u64 size,
@@ -31,7 +52,6 @@  struct xsk_buff_pool *xp_create(struct page **pages, u32 nr_pages, u32 chunks,
 void xp_set_fq(struct xsk_buff_pool *pool, struct xsk_queue *fq);
 void xp_destroy(struct xsk_buff_pool *pool);
 void xp_release(struct xdp_buff_xsk *xskb);
-u64 xp_get_handle(struct xdp_buff_xsk *xskb);
 bool xp_validate_desc(struct xsk_buff_pool *pool, struct xdp_desc *desc);
 
 /* AF_XDP, and XDP core. */
@@ -46,9 +66,29 @@  struct xdp_buff *xp_alloc(struct xsk_buff_pool *pool);
 bool xp_can_alloc(struct xsk_buff_pool *pool, u32 count);
 void *xp_raw_get_data(struct xsk_buff_pool *pool, u64 addr);
 dma_addr_t xp_raw_get_dma(struct xsk_buff_pool *pool, u64 addr);
-dma_addr_t xp_get_dma(struct xdp_buff_xsk *xskb);
-void xp_dma_sync_for_cpu(struct xdp_buff_xsk *xskb);
-void xp_dma_sync_for_device(struct xsk_buff_pool *pool, dma_addr_t dma,
-			    size_t size);
+static inline dma_addr_t xp_get_dma(struct xdp_buff_xsk *xskb)
+{
+	return xskb->dma;
+}
+
+void xp_dma_sync_for_cpu_slow(struct xdp_buff_xsk *xskb);
+static inline void xp_dma_sync_for_cpu(struct xdp_buff_xsk *xskb)
+{
+	if (xskb->pool->cheap_dma)
+		return;
+
+	xp_dma_sync_for_cpu_slow(xskb);
+}
+
+void xp_dma_sync_for_device_slow(struct xsk_buff_pool *pool, dma_addr_t dma,
+				 size_t size);
+static inline void xp_dma_sync_for_device(struct xsk_buff_pool *pool,
+					  dma_addr_t dma, size_t size)
+{
+	if (pool->cheap_dma)
+		return;
+
+	xp_dma_sync_for_device_slow(pool, dma, size);
+}
 
 #endif /* XSK_BUFF_POOL_H_ */
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index bcd5faf82788..46136828e0e9 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -99,6 +99,21 @@  bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem)
 }
 EXPORT_SYMBOL(xsk_umem_uses_need_wakeup);
 
+void xp_release(struct xdp_buff_xsk *xskb)
+{
+	xskb->pool->free_heads[xskb->pool->free_heads_cnt++] = xskb;
+}
+
+static u64 xp_get_handle(struct xdp_buff_xsk *xskb)
+{
+	u64 offset = xskb->xdp.data - xskb->xdp.data_hard_start;
+
+	offset += xskb->pool->headroom;
+	if (!xskb->pool->unaligned)
+		return xskb->orig_addr + offset;
+	return xskb->orig_addr + (offset << XSK_UNALIGNED_BUF_OFFSET_SHIFT);
+}
+
 static int __xsk_rcv_zc(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len)
 {
 	struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp);
diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index 30537220e8f2..bf3c48ba1467 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -14,27 +14,6 @@ 
 #define XSK_NEXT_PG_CONTIG_SHIFT 0
 #define XSK_NEXT_PG_CONTIG_MASK BIT_ULL(XSK_NEXT_PG_CONTIG_SHIFT)
 
-struct xsk_buff_pool {
-	struct xsk_queue *fq;
-	struct list_head free_list;
-	dma_addr_t *dma_pages;
-	struct xdp_buff_xsk *heads;
-	u64 chunk_mask;
-	u64 addrs_cnt;
-	u32 free_list_cnt;
-	u32 dma_pages_cnt;
-	u32 heads_cnt;
-	u32 free_heads_cnt;
-	u32 headroom;
-	u32 chunk_size;
-	u32 frame_len;
-	bool cheap_dma;
-	bool unaligned;
-	void *addrs;
-	struct device *dev;
-	struct xdp_buff_xsk *free_heads[];
-};
-
 static void xp_addr_unmap(struct xsk_buff_pool *pool)
 {
 	vunmap(pool->addrs);
@@ -234,11 +213,6 @@  static bool xp_addr_crosses_non_contig_pg(struct xsk_buff_pool *pool,
 	return xp_desc_crosses_non_contig_pg(pool, addr, pool->chunk_size);
 }
 
-void xp_release(struct xdp_buff_xsk *xskb)
-{
-	xskb->pool->free_heads[xskb->pool->free_heads_cnt++] = xskb;
-}
-
 static u64 xp_aligned_extract_addr(struct xsk_buff_pool *pool, u64 addr)
 {
 	return addr & pool->chunk_mask;
@@ -401,16 +375,6 @@  bool xp_validate_desc(struct xsk_buff_pool *pool, struct xdp_desc *desc)
 		xp_aligned_validate_desc(pool, desc);
 }
 
-u64 xp_get_handle(struct xdp_buff_xsk *xskb)
-{
-	u64 offset = xskb->xdp.data - xskb->xdp.data_hard_start;
-
-	offset += xskb->pool->headroom;
-	if (!xskb->pool->unaligned)
-		return xskb->orig_addr + offset;
-	return xskb->orig_addr + (offset << XSK_UNALIGNED_BUF_OFFSET_SHIFT);
-}
-
 void *xp_raw_get_data(struct xsk_buff_pool *pool, u64 addr)
 {
 	addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr;
@@ -427,32 +391,20 @@  dma_addr_t xp_raw_get_dma(struct xsk_buff_pool *pool, u64 addr)
 }
 EXPORT_SYMBOL(xp_raw_get_dma);
 
-dma_addr_t xp_get_dma(struct xdp_buff_xsk *xskb)
-{
-	return xskb->dma;
-}
-EXPORT_SYMBOL(xp_get_dma);
-
-void xp_dma_sync_for_cpu(struct xdp_buff_xsk *xskb)
+void xp_dma_sync_for_cpu_slow(struct xdp_buff_xsk *xskb)
 {
 	size_t size;
 
-	if (xskb->pool->cheap_dma)
-		return;
-
 	size = xskb->xdp.data_end - xskb->xdp.data;
 	dma_sync_single_range_for_cpu(xskb->pool->dev, xskb->dma, 0,
 				      size, DMA_BIDIRECTIONAL);
 }
-EXPORT_SYMBOL(xp_dma_sync_for_cpu);
+EXPORT_SYMBOL(xp_dma_sync_for_cpu_slow);
 
-void xp_dma_sync_for_device(struct xsk_buff_pool *pool, dma_addr_t dma,
-			    size_t size)
+void xp_dma_sync_for_device_slow(struct xsk_buff_pool *pool, dma_addr_t dma,
+				 size_t size)
 {
-	if (pool->cheap_dma)
-		return;
-
 	dma_sync_single_range_for_device(pool->dev, dma, 0,
 					 size, DMA_BIDIRECTIONAL);
 }
-EXPORT_SYMBOL(xp_dma_sync_for_device);
+EXPORT_SYMBOL(xp_dma_sync_for_device_slow);