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authorJesper Dangaard Brouer <brouer@redhat.com>2018-04-17 17:45:26 +0300
committerDavid S. Miller <davem@davemloft.net>2018-04-17 17:50:27 +0300
commit5ab073ffd326480a6185d096e9703f62ef92b86c (patch)
treea9bcc39ce68cb8ace1f00cf3de8e0276b27845d5 /include/net/xdp.h
parent5168d73201898c581d0503434ee9743cfc8f964b (diff)
downloadlinux-5ab073ffd326480a6185d096e9703f62ef92b86c.tar.xz
xdp: introduce xdp_return_frame API and use in cpumap
Introduce an xdp_return_frame API, and convert over cpumap as the first user, given it have queued XDP frame structure to leverage. V3: Cleanup and remove C99 style comments, pointed out by Alex Duyck. V6: Remove comment that id will be added later (Req by Alex Duyck) V8: Rename enum mem_type to xdp_mem_type (found by kbuild test robot) Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/xdp.h')
-rw-r--r--include/net/xdp.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/include/net/xdp.h b/include/net/xdp.h
index b2362ddfa694..e4207699c410 100644
--- a/include/net/xdp.h
+++ b/include/net/xdp.h
@@ -33,16 +33,43 @@
* also mandatory during RX-ring setup.
*/
+enum xdp_mem_type {
+ MEM_TYPE_PAGE_SHARED = 0, /* Split-page refcnt based model */
+ MEM_TYPE_PAGE_ORDER0, /* Orig XDP full page model */
+ MEM_TYPE_MAX,
+};
+
+struct xdp_mem_info {
+ u32 type; /* enum xdp_mem_type, but known size type */
+};
+
struct xdp_rxq_info {
struct net_device *dev;
u32 queue_index;
u32 reg_state;
+ struct xdp_mem_info mem;
} ____cacheline_aligned; /* perf critical, avoid false-sharing */
+
+static inline
+void xdp_return_frame(void *data, struct xdp_mem_info *mem)
+{
+ if (mem->type == MEM_TYPE_PAGE_SHARED)
+ page_frag_free(data);
+
+ if (mem->type == MEM_TYPE_PAGE_ORDER0) {
+ struct page *page = virt_to_page(data); /* Assumes order0 page*/
+
+ put_page(page);
+ }
+}
+
int xdp_rxq_info_reg(struct xdp_rxq_info *xdp_rxq,
struct net_device *dev, u32 queue_index);
void xdp_rxq_info_unreg(struct xdp_rxq_info *xdp_rxq);
void xdp_rxq_info_unused(struct xdp_rxq_info *xdp_rxq);
bool xdp_rxq_info_is_reg(struct xdp_rxq_info *xdp_rxq);
+int xdp_rxq_info_reg_mem_model(struct xdp_rxq_info *xdp_rxq,
+ enum xdp_mem_type type, void *allocator);
#endif /* __LINUX_NET_XDP_H__ */