diff options
Diffstat (limited to 'drivers/net/ethernet/aquantia/atlantic/aq_nic.c')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c index 24d715c28a35..e11cc29d3264 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c @@ -569,6 +569,103 @@ err_exit: return err; } +static unsigned int aq_nic_map_xdp(struct aq_nic_s *self, + struct xdp_frame *xdpf, + struct aq_ring_s *ring) +{ + struct device *dev = aq_nic_get_dev(self); + struct aq_ring_buff_s *first = NULL; + unsigned int dx = ring->sw_tail; + struct aq_ring_buff_s *dx_buff; + struct skb_shared_info *sinfo; + unsigned int frag_count = 0U; + unsigned int nr_frags = 0U; + unsigned int ret = 0U; + u16 total_len; + + dx_buff = &ring->buff_ring[dx]; + dx_buff->flags = 0U; + + sinfo = xdp_get_shared_info_from_frame(xdpf); + total_len = xdpf->len; + dx_buff->len = total_len; + if (xdp_frame_has_frags(xdpf)) { + nr_frags = sinfo->nr_frags; + total_len += sinfo->xdp_frags_size; + } + dx_buff->pa = dma_map_single(dev, xdpf->data, dx_buff->len, + DMA_TO_DEVICE); + + if (unlikely(dma_mapping_error(dev, dx_buff->pa))) + goto exit; + + first = dx_buff; + dx_buff->len_pkt = total_len; + dx_buff->is_sop = 1U; + dx_buff->is_mapped = 1U; + ++ret; + + for (; nr_frags--; ++frag_count) { + skb_frag_t *frag = &sinfo->frags[frag_count]; + unsigned int frag_len = skb_frag_size(frag); + unsigned int buff_offset = 0U; + unsigned int buff_size = 0U; + dma_addr_t frag_pa; + + while (frag_len) { + if (frag_len > AQ_CFG_TX_FRAME_MAX) + buff_size = AQ_CFG_TX_FRAME_MAX; + else + buff_size = frag_len; + + frag_pa = skb_frag_dma_map(dev, frag, buff_offset, + buff_size, DMA_TO_DEVICE); + + if (unlikely(dma_mapping_error(dev, frag_pa))) + goto mapping_error; + + dx = aq_ring_next_dx(ring, dx); + dx_buff = &ring->buff_ring[dx]; + + dx_buff->flags = 0U; + dx_buff->len = buff_size; + dx_buff->pa = frag_pa; + dx_buff->is_mapped = 1U; + dx_buff->eop_index = 0xffffU; + + frag_len -= buff_size; + buff_offset += buff_size; + + ++ret; + } + } + + first->eop_index = dx; + dx_buff->is_eop = 1U; + dx_buff->skb = NULL; + dx_buff->xdpf = xdpf; + goto exit; + +mapping_error: + for (dx = ring->sw_tail; + ret > 0; + --ret, dx = aq_ring_next_dx(ring, dx)) { + dx_buff = &ring->buff_ring[dx]; + + if (!dx_buff->pa) + continue; + if (unlikely(dx_buff->is_sop)) + dma_unmap_single(dev, dx_buff->pa, dx_buff->len, + DMA_TO_DEVICE); + else + dma_unmap_page(dev, dx_buff->pa, dx_buff->len, + DMA_TO_DEVICE); + } + +exit: + return ret; +} + unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, struct aq_ring_s *ring) { @@ -697,6 +794,7 @@ unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, first->eop_index = dx; dx_buff->is_eop = 1U; dx_buff->skb = skb; + dx_buff->xdpf = NULL; goto exit; mapping_error: @@ -725,6 +823,44 @@ exit: return ret; } +int aq_nic_xmit_xdpf(struct aq_nic_s *aq_nic, struct aq_ring_s *tx_ring, + struct xdp_frame *xdpf) +{ + u16 queue_index = AQ_NIC_RING2QMAP(aq_nic, tx_ring->idx); + struct net_device *ndev = aq_nic_get_ndev(aq_nic); + struct skb_shared_info *sinfo; + int cpu = smp_processor_id(); + int err = NETDEV_TX_BUSY; + struct netdev_queue *nq; + unsigned int frags = 1; + + if (xdp_frame_has_frags(xdpf)) { + sinfo = xdp_get_shared_info_from_frame(xdpf); + frags += sinfo->nr_frags; + } + + if (frags > AQ_CFG_SKB_FRAGS_MAX) + return err; + + nq = netdev_get_tx_queue(ndev, tx_ring->idx); + __netif_tx_lock(nq, cpu); + + aq_ring_update_queue_state(tx_ring); + + /* Above status update may stop the queue. Check this. */ + if (__netif_subqueue_stopped(aq_nic_get_ndev(aq_nic), queue_index)) + goto out; + + frags = aq_nic_map_xdp(aq_nic, xdpf, tx_ring); + if (likely(frags)) + err = aq_nic->aq_hw_ops->hw_ring_tx_xmit(aq_nic->aq_hw, tx_ring, + frags); +out: + __netif_tx_unlock(nq); + + return err; +} + int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb) { struct aq_nic_cfg_s *cfg = aq_nic_get_cfg(self); |