diff options
Diffstat (limited to 'include/net/xdp_sock_drv.h')
| -rw-r--r-- | include/net/xdp_sock_drv.h | 73 |
1 files changed, 62 insertions, 11 deletions
diff --git a/include/net/xdp_sock_drv.h b/include/net/xdp_sock_drv.h index 7a7316d9c0da..513c8e9704f6 100644 --- a/include/net/xdp_sock_drv.h +++ b/include/net/xdp_sock_drv.h @@ -92,7 +92,7 @@ static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool) return xp_alloc(pool); } -static inline bool xsk_is_eop_desc(struct xdp_desc *desc) +static inline bool xsk_is_eop_desc(const struct xdp_desc *desc) { return !xp_mb_desc(desc); } @@ -127,14 +127,24 @@ out: xp_free(xskb); } -static inline void xsk_buff_add_frag(struct xdp_buff *xdp) +static inline bool xsk_buff_add_frag(struct xdp_buff *head, + struct xdp_buff *xdp) { - struct xdp_buff_xsk *frag = container_of(xdp, struct xdp_buff_xsk, xdp); + const void *data = xdp->data; + struct xdp_buff_xsk *frag; + + if (!__xdp_buff_add_frag(head, virt_to_netmem(data), + offset_in_page(data), xdp->data_end - data, + xdp->frame_sz, false)) + return false; + frag = container_of(xdp, struct xdp_buff_xsk, xdp); list_add_tail(&frag->list_node, &frag->pool->xskb_list); + + return true; } -static inline struct xdp_buff *xsk_buff_get_frag(struct xdp_buff *first) +static inline struct xdp_buff *xsk_buff_get_frag(const struct xdp_buff *first) { struct xdp_buff_xsk *xskb = container_of(first, struct xdp_buff_xsk, xdp); struct xdp_buff *ret = NULL; @@ -186,30 +196,56 @@ static inline void *xsk_buff_raw_get_data(struct xsk_buff_pool *pool, u64 addr) return xp_raw_get_data(pool, addr); } +/** + * xsk_buff_raw_get_ctx - get &xdp_desc context + * @pool: XSk buff pool desc address belongs to + * @addr: desc address (from userspace) + * + * Wrapper for xp_raw_get_ctx() to be used in drivers, see its kdoc for + * details. + * + * Return: new &xdp_desc_ctx struct containing desc's DMA address and metadata + * pointer, if it is present and valid (initialized to %NULL otherwise). + */ +static inline struct xdp_desc_ctx +xsk_buff_raw_get_ctx(const struct xsk_buff_pool *pool, u64 addr) +{ + return xp_raw_get_ctx(pool, addr); +} + #define XDP_TXMD_FLAGS_VALID ( \ XDP_TXMD_FLAGS_TIMESTAMP | \ XDP_TXMD_FLAGS_CHECKSUM | \ + XDP_TXMD_FLAGS_LAUNCH_TIME | \ 0) -static inline bool xsk_buff_valid_tx_metadata(struct xsk_tx_metadata *meta) +static inline bool +xsk_buff_valid_tx_metadata(const struct xsk_tx_metadata *meta) { return !(meta->flags & ~XDP_TXMD_FLAGS_VALID); } -static inline struct xsk_tx_metadata *xsk_buff_get_metadata(struct xsk_buff_pool *pool, u64 addr) +static inline struct xsk_tx_metadata * +__xsk_buff_get_metadata(const struct xsk_buff_pool *pool, void *data) { struct xsk_tx_metadata *meta; if (!pool->tx_metadata_len) return NULL; - meta = xp_raw_get_data(pool, addr) - pool->tx_metadata_len; + meta = data - pool->tx_metadata_len; if (unlikely(!xsk_buff_valid_tx_metadata(meta))) return NULL; /* no way to signal the error to the user */ return meta; } +static inline struct xsk_tx_metadata * +xsk_buff_get_metadata(struct xsk_buff_pool *pool, u64 addr) +{ + return __xsk_buff_get_metadata(pool, xp_raw_get_data(pool, addr)); +} + static inline void xsk_buff_dma_sync_for_cpu(struct xdp_buff *xdp) { struct xdp_buff_xsk *xskb = container_of(xdp, struct xdp_buff_xsk, xdp); @@ -323,7 +359,7 @@ static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool) return NULL; } -static inline bool xsk_is_eop_desc(struct xdp_desc *desc) +static inline bool xsk_is_eop_desc(const struct xdp_desc *desc) { return false; } @@ -342,11 +378,13 @@ static inline void xsk_buff_free(struct xdp_buff *xdp) { } -static inline void xsk_buff_add_frag(struct xdp_buff *xdp) +static inline bool xsk_buff_add_frag(struct xdp_buff *head, + struct xdp_buff *xdp) { + return false; } -static inline struct xdp_buff *xsk_buff_get_frag(struct xdp_buff *first) +static inline struct xdp_buff *xsk_buff_get_frag(const struct xdp_buff *first) { return NULL; } @@ -375,12 +413,25 @@ static inline void *xsk_buff_raw_get_data(struct xsk_buff_pool *pool, u64 addr) return NULL; } +static inline struct xdp_desc_ctx +xsk_buff_raw_get_ctx(const struct xsk_buff_pool *pool, u64 addr) +{ + return (struct xdp_desc_ctx){ }; +} + static inline bool xsk_buff_valid_tx_metadata(struct xsk_tx_metadata *meta) { return false; } -static inline struct xsk_tx_metadata *xsk_buff_get_metadata(struct xsk_buff_pool *pool, u64 addr) +static inline struct xsk_tx_metadata * +__xsk_buff_get_metadata(const struct xsk_buff_pool *pool, void *data) +{ + return NULL; +} + +static inline struct xsk_tx_metadata * +xsk_buff_get_metadata(struct xsk_buff_pool *pool, u64 addr) { return NULL; } |