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cns3xxx: improve ethernet performance by using the page fragment allocation API

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48580
This commit is contained in:
Felix Fietkau 2016-01-31 12:35:20 +00:00
parent 3d4444f257
commit 9ab08d665f
1 changed files with 7 additions and 7 deletions
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14
target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c
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@ -518,14 +518,14 @@ static void cns3xxx_alloc_rx_buf(struct sw *sw, int received)
unsigned int phys; unsigned int phys;
for (received += rx_ring->alloc_count; received > 0; received--) { for (received += rx_ring->alloc_count; received > 0; received--) {
buf = kmalloc(RX_SEGMENT_ALLOC_SIZE, GFP_ATOMIC); buf = napi_alloc_frag(RX_SEGMENT_ALLOC_SIZE);
if (!buf) if (!buf)
break; break;
phys = dma_map_single(sw->dev, buf + SKB_HEAD_ALIGN, phys = dma_map_single(sw->dev, buf + SKB_HEAD_ALIGN,
RX_SEGMENT_MRU, DMA_FROM_DEVICE); RX_SEGMENT_MRU, DMA_FROM_DEVICE);
if (dma_mapping_error(sw->dev, phys)) { if (dma_mapping_error(sw->dev, phys)) {
kfree(buf); skb_free_frag(buf);
break; break;
} }
@ -636,7 +636,7 @@ static int eth_poll(struct napi_struct *napi, int budget)
dma_unmap_single(sw->dev, rx_ring->phys_tab[i], dma_unmap_single(sw->dev, rx_ring->phys_tab[i],
RX_SEGMENT_MRU, DMA_FROM_DEVICE); RX_SEGMENT_MRU, DMA_FROM_DEVICE);
skb = build_skb(rx_ring->buff_tab[i], 0); skb = build_skb(rx_ring->buff_tab[i], RX_SEGMENT_ALLOC_SIZE);
if (!skb) if (!skb)
break; break;
@ -907,7 +907,7 @@ static int init_rings(struct sw *sw)
struct rx_desc *desc = &(rx_ring)->desc[i]; struct rx_desc *desc = &(rx_ring)->desc[i];
void *buf; void *buf;
buf = kzalloc(RX_SEGMENT_ALLOC_SIZE, GFP_KERNEL); buf = netdev_alloc_frag(RX_SEGMENT_ALLOC_SIZE);
if (!buf) if (!buf)
return -ENOMEM; return -ENOMEM;
@ -957,14 +957,14 @@ static void destroy_rings(struct sw *sw)
for (i = 0; i < RX_DESCS; i++) { for (i = 0; i < RX_DESCS; i++) {
struct _rx_ring *rx_ring = &sw->rx_ring; struct _rx_ring *rx_ring = &sw->rx_ring;
struct rx_desc *desc = &(rx_ring)->desc[i]; struct rx_desc *desc = &(rx_ring)->desc[i];
struct sk_buff *skb = sw->rx_ring.buff_tab[i]; void *buf = sw->rx_ring.buff_tab[i];
if (!skb) if (!buf)
continue; continue;
dma_unmap_single(sw->dev, desc->sdp, RX_SEGMENT_MRU, dma_unmap_single(sw->dev, desc->sdp, RX_SEGMENT_MRU,
DMA_FROM_DEVICE); DMA_FROM_DEVICE);
dev_kfree_skb(skb); skb_free_frag(buf);
} }
for (i = 0; i < TX_DESCS; i++) { for (i = 0; i < TX_DESCS; i++) {