+static inline dma_addr_t xp_get_dma(struct xdp_buff_xsk *xskb)
+{
+ return xskb->dma;
+}
+
+static inline dma_addr_t xp_get_frame_dma(struct xdp_buff_xsk *xskb)
+{
+ return xskb->frame_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);
+}
+
+/* Masks for xdp_umem_page flags.
+ * The low 12-bits of the addr will be 0 since this is the page address, so we
+ * can use them for flags.
+ */
+#define XSK_NEXT_PG_CONTIG_SHIFT 0
+#define XSK_NEXT_PG_CONTIG_MASK BIT_ULL(XSK_NEXT_PG_CONTIG_SHIFT)
+
+static inline bool xp_desc_crosses_non_contig_pg(struct xsk_buff_pool *pool,
+ u64 addr, u32 len)
+{
+ bool cross_pg = (addr & (PAGE_SIZE - 1)) + len > PAGE_SIZE;
+
+ if (pool->dma_pages_cnt && cross_pg) {
+ return !(pool->dma_pages[addr >> PAGE_SHIFT] &
+ XSK_NEXT_PG_CONTIG_MASK);
+ }
+ return false;
+}
+
+static inline u64 xp_aligned_extract_addr(struct xsk_buff_pool *pool, u64 addr)
+{
+ return addr & pool->chunk_mask;
+}
+
+static inline u64 xp_unaligned_extract_addr(u64 addr)
+{
+ return addr & XSK_UNALIGNED_BUF_ADDR_MASK;
+}
+
+static inline u64 xp_unaligned_extract_offset(u64 addr)
+{
+ return addr >> XSK_UNALIGNED_BUF_OFFSET_SHIFT;
+}
+
+static inline u64 xp_unaligned_add_offset_to_addr(u64 addr)
+{
+ return xp_unaligned_extract_addr(addr) +
+ xp_unaligned_extract_offset(addr);
+}