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Commit c7dab99b authored by Brice Goglin's avatar Brice Goglin Committed by Jeff Garzik
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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: default avatarBrice Goglin <brice@myri.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent dd50f336

drivers/net/myri10ge/myri10ge.c

+93 −79
Original line number Diff line number Diff line
@@ -1264,12 +1264,12 @@ static inline void myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int *limit) 
		rx_done->entry[idx].length = 0;

		checksum = csum_unfold(rx_done->entry[idx].checksum);

		if (length <= mgp->small_bytes)

			rx_ok = myri10ge_rx_done(mgp, &mgp->rx_small,

			rx_ok = myri10ge_page_rx_done(mgp, &mgp->rx_small,

						      mgp->small_bytes,

						      length, checksum);

		else

			rx_ok = myri10ge_rx_done(mgp, &mgp->rx_big,

						 mgp->dev->mtu + ETH_HLEN,

			rx_ok = myri10ge_page_rx_done(mgp, &mgp->rx_big,

						      mgp->big_bytes,

						      length, checksum);

		rx_packets += rx_ok;

		rx_bytes += rx_ok * (unsigned long)length;
@@ -1284,6 +1284,14 @@ static inline void myri10ge_clean_rx_done(struct myri10ge_priv *mgp, int *limit) 
	rx_done->cnt = cnt;

	mgp->stats.rx_packets += rx_packets;

	mgp->stats.rx_bytes += rx_bytes;



	/* restock receive rings if needed */

	if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt < myri10ge_fill_thresh)

		myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,

					mgp->small_bytes + MXGEFW_PAD, 0);

	if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt < myri10ge_fill_thresh)

		myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);



}



static inline void myri10ge_check_statblock(struct myri10ge_priv *mgp)
@@ -1674,56 +1682,48 @@ static int myri10ge_allocate_rings(struct net_device *dev) 
		goto abort_with_rx_small_info;



	/* Fill the receive rings */



	for (i = 0; i <= mgp->rx_small.mask; i++) {

		status = myri10ge_getbuf(&mgp->rx_small, mgp,

					 mgp->small_bytes, i);

		if (status) {

			printk(KERN_ERR

			       "myri10ge: %s: alloced only %d small bufs\n",

			       dev->name, i);

	mgp->rx_big.cnt = 0;

	mgp->rx_small.cnt = 0;

	mgp->rx_big.fill_cnt = 0;

	mgp->rx_small.fill_cnt = 0;

	mgp->rx_small.page_offset = MYRI10GE_ALLOC_SIZE;

	mgp->rx_big.page_offset = MYRI10GE_ALLOC_SIZE;

	mgp->rx_small.watchdog_needed = 0;

	mgp->rx_big.watchdog_needed = 0;

	myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,

				mgp->small_bytes + MXGEFW_PAD, 0);



	if (mgp->rx_small.fill_cnt < mgp->rx_small.mask + 1) {

		printk(KERN_ERR "myri10ge: %s: alloced only %d small bufs\n",

		       dev->name, mgp->rx_small.fill_cnt);

		goto abort_with_rx_small_ring;

	}

	}



	for (i = 0; i <= mgp->rx_big.mask; i++) {

		status =

		    myri10ge_getbuf(&mgp->rx_big, mgp, dev->mtu + ETH_HLEN, i);

		if (status) {

			printk(KERN_ERR

			       "myri10ge: %s: alloced only %d big bufs\n",

			       dev->name, i);

	myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 0);

	if (mgp->rx_big.fill_cnt < mgp->rx_big.mask + 1) {

		printk(KERN_ERR "myri10ge: %s: alloced only %d big bufs\n",

		       dev->name, mgp->rx_big.fill_cnt);

		goto abort_with_rx_big_ring;

	}

	}



	return 0;



abort_with_rx_big_ring:

	for (i = 0; i <= mgp->rx_big.mask; i++) {

		if (mgp->rx_big.info[i].skb != NULL)

			dev_kfree_skb_any(mgp->rx_big.info[i].skb);

		if (pci_unmap_len(&mgp->rx_big.info[i], len))

			pci_unmap_single(mgp->pdev,

					 pci_unmap_addr(&mgp->rx_big.info[i],

							bus),

					 pci_unmap_len(&mgp->rx_big.info[i],

						       len),

					 PCI_DMA_FROMDEVICE);

	for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {

		int idx = i & mgp->rx_big.mask;

		myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],

				       mgp->big_bytes);

		put_page(mgp->rx_big.info[idx].page);

	}



abort_with_rx_small_ring:

	for (i = 0; i <= mgp->rx_small.mask; i++) {

		if (mgp->rx_small.info[i].skb != NULL)

			dev_kfree_skb_any(mgp->rx_small.info[i].skb);

		if (pci_unmap_len(&mgp->rx_small.info[i], len))

			pci_unmap_single(mgp->pdev,

					 pci_unmap_addr(&mgp->rx_small.info[i],

							bus),

					 pci_unmap_len(&mgp->rx_small.info[i],

						       len),

					 PCI_DMA_FROMDEVICE);

	for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {

		int idx = i & mgp->rx_small.mask;

		myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],

				       mgp->small_bytes + MXGEFW_PAD);

		put_page(mgp->rx_small.info[idx].page);

	}



	kfree(mgp->rx_big.info);



abort_with_rx_small_info:
@@ -1756,30 +1756,24 @@ static void myri10ge_free_rings(struct net_device *dev) 


	mgp = netdev_priv(dev);



	for (i = 0; i <= mgp->rx_big.mask; i++) {

		if (mgp->rx_big.info[i].skb != NULL)

			dev_kfree_skb_any(mgp->rx_big.info[i].skb);

		if (pci_unmap_len(&mgp->rx_big.info[i], len))

			pci_unmap_single(mgp->pdev,

					 pci_unmap_addr(&mgp->rx_big.info[i],

							bus),

					 pci_unmap_len(&mgp->rx_big.info[i],

						       len),

					 PCI_DMA_FROMDEVICE);

	for (i = mgp->rx_big.cnt; i < mgp->rx_big.fill_cnt; i++) {

		idx = i & mgp->rx_big.mask;

		if (i == mgp->rx_big.fill_cnt - 1)

			mgp->rx_big.info[idx].page_offset = MYRI10GE_ALLOC_SIZE;

		myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_big.info[idx],

				       mgp->big_bytes);

		put_page(mgp->rx_big.info[idx].page);

	}



	for (i = 0; i <= mgp->rx_small.mask; i++) {

		if (mgp->rx_small.info[i].skb != NULL)

			dev_kfree_skb_any(mgp->rx_small.info[i].skb);

		if (pci_unmap_len(&mgp->rx_small.info[i], len))

			pci_unmap_single(mgp->pdev,

					 pci_unmap_addr(&mgp->rx_small.info[i],

							bus),

					 pci_unmap_len(&mgp->rx_small.info[i],

						       len),

					 PCI_DMA_FROMDEVICE);

	for (i = mgp->rx_small.cnt; i < mgp->rx_small.fill_cnt; i++) {

		idx = i & mgp->rx_small.mask;

		if (i == mgp->rx_small.fill_cnt - 1)

			mgp->rx_small.info[idx].page_offset =

			    MYRI10GE_ALLOC_SIZE;

		myri10ge_unmap_rx_page(mgp->pdev, &mgp->rx_small.info[idx],

				       mgp->small_bytes + MXGEFW_PAD);

		put_page(mgp->rx_small.info[idx].page);

	}



	tx = &mgp->tx;

	while (tx->done != tx->req) {

		idx = tx->done & tx->mask;
@@ -1847,19 +1841,18 @@ static int myri10ge_open(struct net_device *dev) 
	 */



	if (dev->mtu <= ETH_DATA_LEN)

		mgp->small_bytes = 128;	/* enough for a TCP header */

		/* enough for a TCP header */

		mgp->small_bytes = (128 > SMP_CACHE_BYTES)

		    ? (128 - MXGEFW_PAD)

		    : (SMP_CACHE_BYTES - MXGEFW_PAD);

	else

		mgp->small_bytes = ETH_FRAME_LEN;	/* enough for an ETH_DATA_LEN frame */

		/* enough for an ETH_DATA_LEN frame */

		mgp->small_bytes = ETH_FRAME_LEN;



	/* Override the small buffer size? */

	if (myri10ge_small_bytes > 0)

		mgp->small_bytes = myri10ge_small_bytes;



	/* If the user sets an obscenely small MTU, adjust the small

	 * bytes down to nearly nothing */

	if (mgp->small_bytes >= (dev->mtu + ETH_HLEN))

		mgp->small_bytes = 64;



	/* get the lanai pointers to the send and receive rings */



	status |= myri10ge_send_cmd(mgp, MXGEFW_CMD_GET_SEND_OFFSET, &cmd, 0);
@@ -1895,17 +1888,23 @@ static int myri10ge_open(struct net_device *dev) 
		mgp->rx_big.wc_fifo = NULL;

	}



	status = myri10ge_allocate_rings(dev);

	if (status != 0)

		goto abort_with_nothing;



	/* Firmware needs the big buff size as a power of 2.  Lie and

	 * tell him the buffer is larger, because we only use 1

	 * buffer/pkt, and the mtu will prevent overruns.

	 */

	big_pow2 = dev->mtu + ETH_HLEN + MXGEFW_PAD;

	if (big_pow2 < MYRI10GE_ALLOC_SIZE / 2) {

		while ((big_pow2 & (big_pow2 - 1)) != 0)

			big_pow2++;

		mgp->big_bytes = dev->mtu + ETH_HLEN + MXGEFW_PAD;

	} else {

		big_pow2 = MYRI10GE_ALLOC_SIZE;

		mgp->big_bytes = big_pow2;

	}



	status = myri10ge_allocate_rings(dev);

	if (status != 0)

		goto abort_with_nothing;



	/* now give firmware buffers sizes, and MTU */

	cmd.data0 = dev->mtu + ETH_HLEN + VLAN_HLEN;
@@ -2888,6 +2887,21 @@ static void myri10ge_watchdog_timer(unsigned long arg) 
	struct myri10ge_priv *mgp;



	mgp = (struct myri10ge_priv *)arg;



	if (mgp->rx_small.watchdog_needed) {

		myri10ge_alloc_rx_pages(mgp, &mgp->rx_small,

					mgp->small_bytes + MXGEFW_PAD, 1);

		if (mgp->rx_small.fill_cnt - mgp->rx_small.cnt >=

		    myri10ge_fill_thresh)

			mgp->rx_small.watchdog_needed = 0;

	}

	if (mgp->rx_big.watchdog_needed) {

		myri10ge_alloc_rx_pages(mgp, &mgp->rx_big, mgp->big_bytes, 1);

		if (mgp->rx_big.fill_cnt - mgp->rx_big.cnt >=

		    myri10ge_fill_thresh)

			mgp->rx_big.watchdog_needed = 0;

	}



	if (mgp->tx.req != mgp->tx.done &&

	    mgp->tx.done == mgp->watchdog_tx_done &&

	    mgp->watchdog_tx_req != mgp->watchdog_tx_done)