--- /dev/null
+diff -urN linux.old/drivers/net/via-rhine.c linux.dev/drivers/net/via-rhine.c
+--- linux.old/drivers/net/via-rhine.c 2006-06-08 20:21:20.000000000 +0200
++++ linux.dev/drivers/net/via-rhine.c 2006-06-08 20:19:40.000000000 +0200
+@@ -131,6 +131,10 @@
+ - Fix Tx engine race for good
+ - Craig Brind: Zero padded aligned buffers for short packets.
+
++ OpenWrt Version (Felix Fietkau <nbd@openwrt.org>)
++ - Performance improvements
++ - NAPI polling
++
+ */
+
+ #define DRV_NAME "via-rhine"
+@@ -142,7 +146,6 @@
+ These may be modified when a driver module is loaded. */
+
+ static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
+-static int max_interrupt_work = 20;
+
+ /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
+ Setting to > 1518 effectively disables this feature. */
+@@ -165,9 +168,9 @@
+ Making the Tx ring too large decreases the effectiveness of channel
+ bonding and packet priority.
+ There are no ill effects from too-large receive rings. */
+-#define TX_RING_SIZE 16
+-#define TX_QUEUE_LEN 10 /* Limit ring entries actually used. */
+-#define RX_RING_SIZE 16
++#define TX_RING_SIZE 128
++#define TX_QUEUE_LEN 120 /* Limit ring entries actually used. */
++#define RX_RING_SIZE 128
+
+
+ /* Operational parameters that usually are not changed. */
+@@ -201,6 +204,7 @@
+ #include <asm/io.h>
+ #include <asm/irq.h>
+ #include <asm/uaccess.h>
++#include <asm/unaligned.h>
+
+ /* These identify the driver base version and may not be removed. */
+ static char version[] __devinitdata =
+@@ -217,10 +221,8 @@
+ MODULE_DESCRIPTION("VIA Rhine PCI Fast Ethernet driver");
+ MODULE_LICENSE("GPL");
+
+-module_param(max_interrupt_work, int, 0);
+ module_param(debug, int, 0);
+ module_param(rx_copybreak, int, 0);
+-MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt");
+ MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)");
+ MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames");
+
+@@ -461,6 +463,8 @@
+ struct tx_desc *tx_ring;
+ dma_addr_t rx_ring_dma;
+ dma_addr_t tx_ring_dma;
++ u32 istat;
++ u32 imask;
+
+ /* The addresses of receive-in-place skbuffs. */
+ struct sk_buff *rx_skbuff[RX_RING_SIZE];
+@@ -504,9 +508,10 @@
+ static void rhine_check_media_task(struct net_device *dev);
+ static int rhine_start_tx(struct sk_buff *skb, struct net_device *dev);
+ static irqreturn_t rhine_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
+-static void rhine_tx(struct net_device *dev);
+-static void rhine_rx(struct net_device *dev);
+-static void rhine_error(struct net_device *dev, int intr_status);
++static int rhine_poll(struct net_device *dev, int *budget);
++static int rhine_tx(struct net_device *dev);
++static int rhine_rx(struct net_device *dev);
++static void rhine_error(struct net_device *dev);
+ static void rhine_set_rx_mode(struct net_device *dev);
+ static struct net_device_stats *rhine_get_stats(struct net_device *dev);
+ static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+@@ -601,6 +606,8 @@
+ struct rhine_private *rp = netdev_priv(dev);
+ void __iomem *ioaddr = rp->base;
+
++ pci_enable_device(rp->pdev);
++
+ iowrite8(Cmd1Reset, ioaddr + ChipCmd1);
+ IOSYNC;
+
+@@ -622,6 +629,28 @@
+ "failed" : "succeeded");
+ }
+
++static inline void rhine_intr_enable(struct net_device *dev)
++{
++ struct rhine_private *rp = netdev_priv(dev);
++ void __iomem *ioaddr = rp->base;
++
++ iowrite16(rp->imask = (IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow |
++ IntrRxDropped | IntrRxNoBuf | IntrTxAborted |
++ IntrTxDone | IntrTxError | IntrTxUnderrun |
++ IntrPCIErr | IntrStatsMax | IntrLinkChange),
++ ioaddr + IntrEnable);
++}
++
++static inline void rhine_intr_disable(struct net_device *dev)
++{
++ struct rhine_private *rp = netdev_priv(dev);
++ void __iomem *ioaddr = rp->base;
++
++ iowrite16(rp->imask = (IntrRxOverflow | IntrRxNoBuf | IntrTxAborted |
++ IntrTxError | IntrTxUnderrun | IntrPCIErr | IntrStatsMax | IntrLinkChange),
++ ioaddr + IntrEnable);
++}
++
+ #ifdef USE_MMIO
+ static void enable_mmio(long pioaddr, u32 quirks)
+ {
+@@ -664,14 +693,26 @@
+
+ }
+
+-#ifdef CONFIG_NET_POLL_CONTROLLER
+-static void rhine_poll(struct net_device *dev)
++static int rhine_poll(struct net_device *dev, int *budget)
+ {
+- disable_irq(dev->irq);
+- rhine_interrupt(dev->irq, (void *)dev, NULL);
+- enable_irq(dev->irq);
++ unsigned int work_done, work_to_do = min(*budget, dev->quota);
++ struct rhine_private *rp = netdev_priv(dev);
++
++ work_done = rhine_rx(dev);
++
++ if (rp->istat & (IntrTxErrSummary | IntrTxDone))
++ rhine_tx(dev);
++
++ *budget -= work_done;
++ dev->quota -= work_done;
++
++ if (work_done < work_to_do) {
++ netif_rx_complete(dev);
++ rhine_intr_enable(dev);
++ }
++
++ return (work_done >= work_to_do);
+ }
+-#endif
+
+ static void rhine_hw_init(struct net_device *dev, long pioaddr)
+ {
+@@ -850,11 +891,10 @@
+ dev->ethtool_ops = &netdev_ethtool_ops;
+ dev->tx_timeout = rhine_tx_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+-#ifdef CONFIG_NET_POLL_CONTROLLER
+- dev->poll_controller = rhine_poll;
+-#endif
+- if (rp->quirks & rqRhineI)
+- dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM;
++ dev->poll = rhine_poll;
++ dev->weight = 64;
++
++ dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
+
+ INIT_WORK(&rp->tx_timeout_task,
+ (void (*)(void *))rhine_tx_timeout_task, dev);
+@@ -904,6 +944,10 @@
+ }
+ }
+ rp->mii_if.phy_id = phy_id;
++
++ // shut down until somebody really needs it
++ iowrite8(0x80, ioaddr + 0xa1);
++ pci_set_power_state(rp->pdev, 3);
+
+ return 0;
+
+@@ -995,7 +1039,7 @@
+
+ /* Fill in the Rx buffers. Handle allocation failure gracefully. */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+- struct sk_buff *skb = dev_alloc_skb(rp->rx_buf_sz);
++ struct sk_buff *skb = dev_alloc_skb(rp->rx_buf_sz + 4);
+ rp->rx_skbuff[i] = skb;
+ if (skb == NULL)
+ break;
+@@ -1115,11 +1159,7 @@
+ rhine_set_rx_mode(dev);
+
+ /* Enable interrupts by setting the interrupt mask. */
+- iowrite16(IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow |
+- IntrRxDropped | IntrRxNoBuf | IntrTxAborted |
+- IntrTxDone | IntrTxError | IntrTxUnderrun |
+- IntrPCIErr | IntrStatsMax | IntrLinkChange,
+- ioaddr + IntrEnable);
++ rhine_intr_enable(dev);
+
+ iowrite16(CmdStart | CmdTxOn | CmdRxOn | (Cmd1NoTxPoll << 8),
+ ioaddr + ChipCmd);
+@@ -1230,6 +1270,7 @@
+ mdio_read(dev, rp->mii_if.phy_id, MII_BMSR));
+
+ netif_start_queue(dev);
++ netif_poll_enable(dev);
+
+ return 0;
+ }
+@@ -1268,8 +1309,8 @@
+ /* Reinitialize the hardware. */
+ rhine_chip_reset(dev);
+ init_registers(dev);
+-
+ spin_unlock(&rp->lock);
++
+ enable_irq(rp->pdev->irq);
+
+ dev->trans_start = jiffies;
+@@ -1363,69 +1404,56 @@
+ struct net_device *dev = dev_instance;
+ struct rhine_private *rp = netdev_priv(dev);
+ void __iomem *ioaddr = rp->base;
+- u32 intr_status;
+- int boguscnt = max_interrupt_work;
+ int handled = 0;
+
+- while ((intr_status = get_intr_status(dev))) {
++ if ((rp->istat = (get_intr_status(dev) & rp->imask))) {
+ handled = 1;
+
+ /* Acknowledge all of the current interrupt sources ASAP. */
+- if (intr_status & IntrTxDescRace)
++ if (rp->istat & IntrTxDescRace)
+ iowrite8(0x08, ioaddr + IntrStatus2);
+- iowrite16(intr_status & 0xffff, ioaddr + IntrStatus);
++ iowrite16(rp->istat & 0xffff, ioaddr + IntrStatus);
+ IOSYNC;
+
+- if (debug > 4)
+- printk(KERN_DEBUG "%s: Interrupt, status %8.8x.\n",
+- dev->name, intr_status);
++ if (likely(rp->istat & ((IntrRxDone | IntrRxErr | IntrRxDropped |
++ IntrRxWakeUp | IntrRxEmpty | IntrRxNoBuf |
++ IntrTxErrSummary | IntrTxDone)))) {
++
++ rhine_intr_disable(dev);
+
+- if (intr_status & (IntrRxDone | IntrRxErr | IntrRxDropped |
+- IntrRxWakeUp | IntrRxEmpty | IntrRxNoBuf))
+- rhine_rx(dev);
+-
+- if (intr_status & (IntrTxErrSummary | IntrTxDone)) {
+- if (intr_status & IntrTxErrSummary) {
+- /* Avoid scavenging before Tx engine turned off */
+- RHINE_WAIT_FOR(!(ioread8(ioaddr+ChipCmd) & CmdTxOn));
+- if (debug > 2 &&
+- ioread8(ioaddr+ChipCmd) & CmdTxOn)
+- printk(KERN_WARNING "%s: "
+- "rhine_interrupt() Tx engine"
+- "still on.\n", dev->name);
+- }
+- rhine_tx(dev);
++ if (likely(netif_rx_schedule_prep(dev)))
++ __netif_rx_schedule(dev);
+ }
+
+ /* Abnormal error summary/uncommon events handlers. */
+- if (intr_status & (IntrPCIErr | IntrLinkChange |
++ if (unlikely(rp->istat & (IntrPCIErr | IntrLinkChange |
+ IntrStatsMax | IntrTxError | IntrTxAborted |
+- IntrTxUnderrun | IntrTxDescRace))
+- rhine_error(dev, intr_status);
+-
+- if (--boguscnt < 0) {
+- printk(KERN_WARNING "%s: Too much work at interrupt, "
+- "status=%#8.8x.\n",
+- dev->name, intr_status);
+- break;
+- }
++ IntrTxUnderrun | IntrTxDescRace)))
++ rhine_error(dev);
+ }
+
+- if (debug > 3)
+- printk(KERN_DEBUG "%s: exiting interrupt, status=%8.8x.\n",
+- dev->name, ioread16(ioaddr + IntrStatus));
+ return IRQ_RETVAL(handled);
+ }
+
+ /* This routine is logically part of the interrupt handler, but isolated
+ for clarity. */
+-static void rhine_tx(struct net_device *dev)
++static int rhine_tx(struct net_device *dev)
+ {
+ struct rhine_private *rp = netdev_priv(dev);
+ int txstatus = 0, entry = rp->dirty_tx % TX_RING_SIZE;
++ void __iomem *ioaddr = rp->base;
++ int done = 0;
+
+- spin_lock(&rp->lock);
++ /* Avoid scavenging before Tx engine turned off */
++ RHINE_WAIT_FOR(!(ioread8(ioaddr+ChipCmd) & CmdTxOn));
++ if (debug > 2 &&
++ ioread8(ioaddr+ChipCmd) & CmdTxOn)
++ printk(KERN_WARNING "%s: "
++ "rhine_interrupt() Tx engine"
++ "still on.\n", dev->name);
+
++
++ spin_lock_irq(&rp->lock);
+ /* find and cleanup dirty tx descriptors */
+ while (rp->dirty_tx != rp->cur_tx) {
+ txstatus = le32_to_cpu(rp->tx_ring[entry].tx_status);
+@@ -1462,6 +1490,7 @@
+ txstatus & 0xF);
+ rp->stats.tx_bytes += rp->tx_skbuff[entry]->len;
+ rp->stats.tx_packets++;
++ done++;
+ }
+ /* Free the original skb. */
+ if (rp->tx_skbuff_dma[entry]) {
+@@ -1470,23 +1499,25 @@
+ rp->tx_skbuff[entry]->len,
+ PCI_DMA_TODEVICE);
+ }
+- dev_kfree_skb_irq(rp->tx_skbuff[entry]);
++ dev_kfree_skb_any(rp->tx_skbuff[entry]);
+ rp->tx_skbuff[entry] = NULL;
+ entry = (++rp->dirty_tx) % TX_RING_SIZE;
+ }
++ spin_unlock_irq(&rp->lock);
++
+ if ((rp->cur_tx - rp->dirty_tx) < TX_QUEUE_LEN - 4)
+ netif_wake_queue(dev);
+
+- spin_unlock(&rp->lock);
++ return done;
+ }
+
+ /* This routine is logically part of the interrupt handler, but isolated
+ for clarity and better register allocation. */
+-static void rhine_rx(struct net_device *dev)
++static int rhine_rx(struct net_device *dev)
+ {
+ struct rhine_private *rp = netdev_priv(dev);
+ int entry = rp->cur_rx % RX_RING_SIZE;
+- int boguscnt = rp->dirty_rx + RX_RING_SIZE - rp->cur_rx;
++ int done = 0;
+
+ if (debug > 4) {
+ printk(KERN_DEBUG "%s: rhine_rx(), entry %d status %8.8x.\n",
+@@ -1503,8 +1534,6 @@
+ if (debug > 4)
+ printk(KERN_DEBUG "rhine_rx() status is %8.8x.\n",
+ desc_status);
+- if (--boguscnt < 0)
+- break;
+ if ((desc_status & (RxWholePkt | RxErr)) != RxWholePkt) {
+ if ((desc_status & RxWholePkt) != RxWholePkt) {
+ printk(KERN_WARNING "%s: Oversized Ethernet "
+@@ -1528,9 +1557,7 @@
+ if (desc_status & 0x0004) rp->stats.rx_frame_errors++;
+ if (desc_status & 0x0002) {
+ /* this can also be updated outside the interrupt handler */
+- spin_lock(&rp->lock);
+ rp->stats.rx_crc_errors++;
+- spin_unlock(&rp->lock);
+ }
+ }
+ } else {
+@@ -1558,6 +1585,7 @@
+ rp->rx_buf_sz,
+ PCI_DMA_FROMDEVICE);
+ } else {
++ int i;
+ skb = rp->rx_skbuff[entry];
+ if (skb == NULL) {
+ printk(KERN_ERR "%s: Inconsistent Rx "
+@@ -1566,6 +1594,14 @@
+ break;
+ }
+ rp->rx_skbuff[entry] = NULL;
++
++ /* align the data to the ip header - should be faster than using rx_copybreak */
++ for (i = pkt_len - (pkt_len % 4); i >= 0; i -= 4) {
++ put_unaligned(*((u32 *) (skb->data + i)), (u32 *) (skb->data + i + 2));
++ }
++ skb->data += 2;
++ skb->tail += 2;
++
+ skb_put(skb, pkt_len);
+ pci_unmap_single(rp->pdev,
+ rp->rx_skbuff_dma[entry],
+@@ -1573,10 +1609,11 @@
+ PCI_DMA_FROMDEVICE);
+ }
+ skb->protocol = eth_type_trans(skb, dev);
+- netif_rx(skb);
++ netif_receive_skb(skb);
+ dev->last_rx = jiffies;
+ rp->stats.rx_bytes += pkt_len;
+ rp->stats.rx_packets++;
++ done++;
+ }
+ entry = (++rp->cur_rx) % RX_RING_SIZE;
+ rp->rx_head_desc = &rp->rx_ring[entry];
+@@ -1587,7 +1624,7 @@
+ struct sk_buff *skb;
+ entry = rp->dirty_rx % RX_RING_SIZE;
+ if (rp->rx_skbuff[entry] == NULL) {
+- skb = dev_alloc_skb(rp->rx_buf_sz);
++ skb = dev_alloc_skb(rp->rx_buf_sz + 4);
+ rp->rx_skbuff[entry] = skb;
+ if (skb == NULL)
+ break; /* Better luck next round. */
+@@ -1600,6 +1637,8 @@
+ }
+ rp->rx_ring[entry].rx_status = cpu_to_le32(DescOwn);
+ }
++
++ return done;
+ }
+
+ /*
+@@ -1649,11 +1688,11 @@
+
+ }
+
+-static void rhine_error(struct net_device *dev, int intr_status)
++static void rhine_error(struct net_device *dev)
+ {
+ struct rhine_private *rp = netdev_priv(dev);
+ void __iomem *ioaddr = rp->base;
+-
++ u32 intr_status = rp->istat;
+ spin_lock(&rp->lock);
+
+ if (intr_status & IntrLinkChange)
+@@ -1898,6 +1937,7 @@
+
+ /* Disable interrupts by clearing the interrupt mask. */
+ iowrite16(0x0000, ioaddr + IntrEnable);
++ rp->imask = 0;
+
+ /* Stop the chip's Tx and Rx processes. */
+ iowrite16(CmdStop, ioaddr + ChipCmd);
+@@ -1912,6 +1952,9 @@
+ free_tbufs(dev);
+ free_ring(dev);
+
++ writeb(0x80, ioaddr + 0xa1);
++ pci_set_power_state(rp->pdev, 3);
++
+ return 0;
+ }
+
+@@ -1941,6 +1984,7 @@
+ return; /* Nothing to do for non-WOL adapters */
+
+ rhine_power_init(dev);
++ netif_poll_disable(dev);
+
+ /* Make sure we use pattern 0, 1 and not 4, 5 */
+ if (rp->quirks & rq6patterns)
projects / openwrt / staging / mkresin.git / commitdiff