diff options
Diffstat (limited to 'target/linux/rb532-2.6/patches/240-via_rhine_performance.patch')
| -rw-r--r-- | target/linux/rb532-2.6/patches/240-via_rhine_performance.patch | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/target/linux/rb532-2.6/patches/240-via_rhine_performance.patch b/target/linux/rb532-2.6/patches/240-via_rhine_performance.patch new file mode 100644 index 0000000000..56c1fb559c --- /dev/null +++ b/target/linux/rb532-2.6/patches/240-via_rhine_performance.patch @@ -0,0 +1,461 @@ +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) |