diff options
Diffstat (limited to 'drivers/net/ethernet/cisco/enic/vnic_wq.h')
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/vnic_wq.h | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/net/ethernet/cisco/enic/vnic_wq.h b/drivers/net/ethernet/cisco/enic/vnic_wq.h index 2c6c70804a39..816f1ad6072f 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_wq.h +++ b/drivers/net/ethernet/cisco/enic/vnic_wq.h @@ -104,6 +104,17 @@ static inline void *vnic_wq_next_desc(struct vnic_wq *wq) return wq->to_use->desc; } +static inline void vnic_wq_doorbell(struct vnic_wq *wq) +{ + /* Adding write memory barrier prevents compiler and/or CPU + * reordering, thus avoiding descriptor posting before + * descriptor is initialized. Otherwise, hardware can read + * stale descriptor fields. + */ + wmb(); + iowrite32(wq->to_use->index, &wq->ctrl->posted_index); +} + static inline void vnic_wq_post(struct vnic_wq *wq, void *os_buf, dma_addr_t dma_addr, unsigned int len, int sop, int eop, @@ -122,15 +133,6 @@ static inline void vnic_wq_post(struct vnic_wq *wq, buf->wr_id = wrid; buf = buf->next; - if (eop) { - /* Adding write memory barrier prevents compiler and/or CPU - * reordering, thus avoiding descriptor posting before - * descriptor is initialized. Otherwise, hardware can read - * stale descriptor fields. - */ - wmb(); - iowrite32(buf->index, &wq->ctrl->posted_index); - } wq->to_use = buf; wq->ring.desc_avail -= desc_skip_cnt; |