diff options
Diffstat (limited to 'net/xdp/xsk_queue.h')
| -rw-r--r-- | net/xdp/xsk_queue.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/net/xdp/xsk_queue.h b/net/xdp/xsk_queue.h index 88b9ae24658d..909c5168ed0f 100644 --- a/net/xdp/xsk_queue.h +++ b/net/xdp/xsk_queue.h @@ -117,6 +117,20 @@ static inline u32 xskq_nb_free(struct xsk_queue *q, u32 producer, u32 dcnt) return q->nentries - (producer - q->cons_tail); } +static inline bool xskq_has_addrs(struct xsk_queue *q, u32 cnt) +{ + u32 entries = q->prod_tail - q->cons_tail; + + if (entries >= cnt) + return true; + + /* Refresh the local pointer. */ + q->prod_tail = READ_ONCE(q->ring->producer); + entries = q->prod_tail - q->cons_tail; + + return entries >= cnt; +} + /* UMEM queue */ static inline bool xskq_is_valid_addr(struct xsk_queue *q, u64 addr) @@ -288,7 +302,7 @@ static inline void xskq_produce_flush_desc(struct xsk_queue *q) /* Order producer and data */ smp_wmb(); /* B, matches C */ - q->prod_tail = q->prod_head, + q->prod_tail = q->prod_head; WRITE_ONCE(q->ring->producer, q->prod_tail); } |