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[PATCH] myri10ge: switch to page-based skb
Switch to physical page skb, by calling the new page-based allocation routines and using myri10ge_page_rx_done(). Signed-off-by: Brice Goglin <brice@myri.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Brice Goglin
Jeff Garzik
parent
dd50f3361f
commit
c7dab99b08
@ -1264,12 +1264,12 @@ static inline void myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int *limit)
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rx_done->entry[idx].length = 0;
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checksum = csum_unfold(rx_done->entry[idx].checksum);
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if (length <= mgp->small_bytes)
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rx_ok = myri10ge_rx_done(mgp, &mgp->rx_small,
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rx_ok = myri10ge_page_rx_done(mgp, &mgp->rx_small,
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mgp->small_bytes,
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length, checksum);
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else
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rx_ok = myri10ge_rx_done(mgp, &mgp->rx_big,
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mgp->dev->mtu + ETH_HLEN,
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rx_ok = myri10ge_page_rx_done(mgp, &mgp->rx_big,
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mgp->big_bytes,
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length, checksum);
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rx_packets += rx_ok;
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rx_bytes += rx_ok * (unsigned long)length;
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@ -1284,6 +1284,14 @@ static inline void myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int *limit)
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rx_done->cnt = cnt;
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mgp->stats.rx_packets += rx_packets;
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mgp->stats.rx_bytes += rx_bytes;
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/* restock receive rings if needed */
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if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt < myri10ge_fill_thresh)
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myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
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mgp->small_bytes + MXGEFW_PAD, 0);
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if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt < myri10ge_fill_thresh)
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myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);
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}
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static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
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@ -1674,56 +1682,48 @@ static int myri10ge_allocate_rings(struct net_device *dev)
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goto abort_with_rx_small_info;
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/* Fill the receive rings */
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mgp->rx_big.cnt = 0;
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mgp->rx_small.cnt = 0;
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mgp->rx_big.fill_cnt = 0;
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mgp->rx_small.fill_cnt = 0;
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mgp->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;
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mgp->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;
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mgp->rx_small.watchdog_needed = 0;
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mgp->rx_big.watchdog_needed = 0;
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myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
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mgp->small_bytes + MXGEFW_PAD, 0);
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for (i = 0; i <= mgp->rx_small.mask; i++) {
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status = myri10ge_getbuf(&mgp->rx_small, mgp,
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mgp->small_bytes, i);
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if (status) {
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printk(KERN_ERR
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"myri10ge: %s: alloced only %d small bufs\n",
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dev->name, i);
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if (mgp->rx_small.fill_cnt < mgp->rx_small.mask + 1) {
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printk(KERN_ERR "myri10ge: %s: alloced only %d small bufs\n",
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dev->name, mgp->rx_small.fill_cnt);
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goto abort_with_rx_small_ring;
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}
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}
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for (i = 0; i <= mgp->rx_big.mask; i++) {
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status =
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myri10ge_getbuf(&mgp->rx_big, mgp, dev->mtu + ETH_HLEN, i);
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if (status) {
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printk(KERN_ERR
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"myri10ge: %s: alloced only %d big bufs\n",
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dev->name, i);
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myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);
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if (mgp->rx_big.fill_cnt < mgp->rx_big.mask + 1) {
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printk(KERN_ERR "myri10ge: %s: alloced only %d big bufs\n",
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dev->name, mgp->rx_big.fill_cnt);
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goto abort_with_rx_big_ring;
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}
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}
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return 0;
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abort_with_rx_big_ring:
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for (i = 0; i <= mgp->rx_big.mask; i++) {
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if (mgp->rx_big.info[i].skb != NULL)
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dev_kfree_skb_any(mgp->rx_big.info[i].skb);
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if (pci_unmap_len(&mgp->rx_big.info[i], len))
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pci_unmap_single(mgp->pdev,
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pci_unmap_addr(&mgp->rx_big.info[i],
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bus),
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pci_unmap_len(&mgp->rx_big.info[i],
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len),
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PCI_DMA_FROMDEVICE);
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for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {
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int idx = i & mgp->rx_big.mask;
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myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],
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mgp->big_bytes);
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put_page(mgp->rx_big.info[idx].page);
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}
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abort_with_rx_small_ring:
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for (i = 0; i <= mgp->rx_small.mask; i++) {
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if (mgp->rx_small.info[i].skb != NULL)
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dev_kfree_skb_any(mgp->rx_small.info[i].skb);
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if (pci_unmap_len(&mgp->rx_small.info[i], len))
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pci_unmap_single(mgp->pdev,
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pci_unmap_addr(&mgp->rx_small.info[i],
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bus),
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pci_unmap_len(&mgp->rx_small.info[i],
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len),
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PCI_DMA_FROMDEVICE);
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for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {
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int idx = i & mgp->rx_small.mask;
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myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],
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mgp->small_bytes + MXGEFW_PAD);
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put_page(mgp->rx_small.info[idx].page);
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}
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kfree(mgp->rx_big.info);
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abort_with_rx_small_info:
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@ -1756,30 +1756,24 @@ static void myri10ge_free_rings(struct net_device *dev)
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mgp = netdev_priv(dev);
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for (i = 0; i <= mgp->rx_big.mask; i++) {
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if (mgp->rx_big.info[i].skb != NULL)
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dev_kfree_skb_any(mgp->rx_big.info[i].skb);
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if (pci_unmap_len(&mgp->rx_big.info[i], len))
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pci_unmap_single(mgp->pdev,
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pci_unmap_addr(&mgp->rx_big.info[i],
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bus),
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pci_unmap_len(&mgp->rx_big.info[i],
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len),
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PCI_DMA_FROMDEVICE);
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for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {
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idx = i & mgp->rx_big.mask;
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if (i == mgp->rx_big.fill_cnt - 1)
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mgp->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;
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myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],
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mgp->big_bytes);
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put_page(mgp->rx_big.info[idx].page);
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}
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for (i = 0; i <= mgp->rx_small.mask; i++) {
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if (mgp->rx_small.info[i].skb != NULL)
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dev_kfree_skb_any(mgp->rx_small.info[i].skb);
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if (pci_unmap_len(&mgp->rx_small.info[i], len))
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pci_unmap_single(mgp->pdev,
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pci_unmap_addr(&mgp->rx_small.info[i],
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bus),
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pci_unmap_len(&mgp->rx_small.info[i],
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len),
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PCI_DMA_FROMDEVICE);
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for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {
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idx = i & mgp->rx_small.mask;
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if (i == mgp->rx_small.fill_cnt - 1)
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mgp->rx_small.info[idx].page_offset =
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MYRI10GE_ALLOC_SIZE;
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myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],
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mgp->small_bytes + MXGEFW_PAD);
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put_page(mgp->rx_small.info[idx].page);
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}
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tx = &mgp->tx;
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while (tx->done != tx->req) {
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idx = tx->done & tx->mask;
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@ -1847,19 +1841,18 @@ static int myri10ge_open(struct net_device *dev)
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*/
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if (dev->mtu <= ETH_DATA_LEN)
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mgp->small_bytes = 128; /* enough for a TCP header */
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/* enough for a TCP header */
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mgp->small_bytes = (128 > SMP_CACHE_BYTES)
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? (128 - MXGEFW_PAD)
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: (SMP_CACHE_BYTES - MXGEFW_PAD);
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else
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mgp->small_bytes = ETH_FRAME_LEN; /* enough for an ETH_DATA_LEN frame */
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/* enough for an ETH_DATA_LEN frame */
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mgp->small_bytes = ETH_FRAME_LEN;
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/* Override the small buffer size? */
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if (myri10ge_small_bytes > 0)
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mgp->small_bytes = myri10ge_small_bytes;
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/* If the user sets an obscenely small MTU, adjust the small
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* bytes down to nearly nothing */
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if (mgp->small_bytes >= (dev->mtu + ETH_HLEN))
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mgp->small_bytes = 64;
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/* get the lanai pointers to the send and receive rings */
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status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, &cmd, 0);
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@ -1895,17 +1888,23 @@ static int myri10ge_open(struct net_device *dev)
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mgp->rx_big.wc_fifo = NULL;
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}
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status = myri10ge_allocate_rings(dev);
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if (status != 0)
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goto abort_with_nothing;
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/* Firmware needs the big buff size as a power of 2. Lie and
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* tell him the buffer is larger, because we only use 1
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* buffer/pkt, and the mtu will prevent overruns.
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*/
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big_pow2 = dev->mtu + ETH_HLEN + MXGEFW_PAD;
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if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {
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while ((big_pow2 & (big_pow2 - 1)) != 0)
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big_pow2++;
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mgp->big_bytes = dev->mtu + ETH_HLEN + MXGEFW_PAD;
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} else {
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big_pow2 = MYRI10GE_ALLOC_SIZE;
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mgp->big_bytes = big_pow2;
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}
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status = myri10ge_allocate_rings(dev);
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if (status != 0)
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goto abort_with_nothing;
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/* now give firmware buffers sizes, and MTU */
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cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
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@ -2888,6 +2887,21 @@ static void myri10ge_watchdog_timer(unsigned long arg)
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struct myri10ge_priv *mgp;
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mgp = (struct myri10ge_priv *)arg;
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if (mgp->rx_small.watchdog_needed) {
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myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,
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mgp->small_bytes + MXGEFW_PAD, 1);
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if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt >=
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myri10ge_fill_thresh)
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mgp->rx_small.watchdog_needed = 0;
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}
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if (mgp->rx_big.watchdog_needed) {
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myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 1);
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if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt >=
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myri10ge_fill_thresh)
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mgp->rx_big.watchdog_needed = 0;
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}
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if (mgp->tx.req != mgp->tx.done &&
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mgp->tx.done == mgp->watchdog_tx_done &&
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mgp->watchdog_tx_req != mgp->watchdog_tx_done)
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