diff options
Diffstat (limited to 'drivers/net/pasemi_mac.c')
| -rw-r--r-- | drivers/net/pasemi_mac.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c index 98b63974268..ca773580cc5 100644 --- a/drivers/net/pasemi_mac.c +++ b/drivers/net/pasemi_mac.c @@ -253,11 +253,11 @@ static int get_skb_hdr(struct sk_buff *skb, void **iphdr, } static int pasemi_mac_unmap_tx_skb(struct pasemi_mac *mac, + const int nfrags, struct sk_buff *skb, const dma_addr_t *dmas) { int f; - int nfrags = skb_shinfo(skb)->nr_frags; struct pci_dev *pdev = mac->dma_pdev; pci_unmap_single(pdev, dmas[0], skb_headlen(skb), PCI_DMA_TODEVICE); @@ -425,7 +425,7 @@ static void pasemi_mac_free_tx_resources(struct pasemi_mac *mac) unsigned int i, j; struct pasemi_mac_buffer *info; dma_addr_t dmas[MAX_SKB_FRAGS+1]; - int freed; + int freed, nfrags; int start, limit; start = txring->next_to_clean; @@ -438,10 +438,12 @@ static void pasemi_mac_free_tx_resources(struct pasemi_mac *mac) for (i = start; i < limit; i += freed) { info = &txring->ring_info[(i+1) & (TX_RING_SIZE-1)]; if (info->dma && info->skb) { - for (j = 0; j <= skb_shinfo(info->skb)->nr_frags; j++) + nfrags = skb_shinfo(info->skb)->nr_frags; + for (j = 0; j <= nfrags; j++) dmas[j] = txring->ring_info[(i+1+j) & (TX_RING_SIZE-1)].dma; - freed = pasemi_mac_unmap_tx_skb(mac, info->skb, dmas); + freed = pasemi_mac_unmap_tx_skb(mac, nfrags, + info->skb, dmas); } else freed = 2; } @@ -749,6 +751,8 @@ static int pasemi_mac_clean_tx(struct pasemi_mac_txring *txring) unsigned long flags; struct sk_buff *skbs[TX_CLEAN_BATCHSIZE]; dma_addr_t dmas[TX_CLEAN_BATCHSIZE][MAX_SKB_FRAGS+1]; + int nf[TX_CLEAN_BATCHSIZE]; + int nr_frags; total_count = 0; batch_limit = TX_CLEAN_BATCHSIZE; @@ -758,6 +762,8 @@ restart: start = txring->next_to_clean; ring_limit = txring->next_to_fill; + prefetch(&TX_DESC_INFO(txring, start+1).skb); + /* Compensate for when fill has wrapped but clean has not */ if (start > ring_limit) ring_limit += TX_RING_SIZE; @@ -771,6 +777,9 @@ restart: u64 mactx = TX_DESC(txring, i); struct sk_buff *skb; + skb = TX_DESC_INFO(txring, i+1).skb; + nr_frags = TX_DESC_INFO(txring, i).dma; + if ((mactx & XCT_MACTX_E) || (*chan->status & PAS_STATUS_ERROR)) pasemi_mac_tx_error(mac, mactx); @@ -779,21 +788,22 @@ restart: /* Not yet transmitted */ break; - skb = TX_DESC_INFO(txring, i+1).skb; - skbs[descr_count] = skb; + buf_count = 2 + nr_frags; + /* Since we always fill with an even number of entries, make + * sure we skip any unused one at the end as well. + */ + if (buf_count & 1) + buf_count++; - buf_count = 2 + skb_shinfo(skb)->nr_frags; - for (j = 0; j <= skb_shinfo(skb)->nr_frags; j++) + for (j = 0; j <= nr_frags; j++) dmas[descr_count][j] = TX_DESC_INFO(txring, i+1+j).dma; + skbs[descr_count] = skb; + nf[descr_count] = nr_frags; + TX_DESC(txring, i) = 0; TX_DESC(txring, i+1) = 0; - /* Since we always fill with an even number of entries, make - * sure we skip any unused one at the end as well. - */ - if (buf_count & 1) - buf_count++; descr_count++; } txring->next_to_clean = i & (TX_RING_SIZE-1); @@ -802,7 +812,7 @@ restart: netif_wake_queue(mac->netdev); for (i = 0; i < descr_count; i++) - pasemi_mac_unmap_tx_skb(mac, skbs[i], dmas[i]); + pasemi_mac_unmap_tx_skb(mac, nf[i], skbs[i], dmas[i]); total_count += descr_count; @@ -1299,6 +1309,7 @@ static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev) } TX_DESC(txring, fill) = mactx; + TX_DESC_INFO(txring, fill).dma = nfrags; fill++; TX_DESC_INFO(txring, fill).skb = skb; for (i = 0; i <= nfrags; i++) { |