massive via-rhine performance improvements
SVN-Revision: 3961
This commit is contained in:
Felix Fietkau
parent
51b6a6f3c8
commit
1cc92a9d14
@ -1,13 +0,0 @@
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diff -urN linux.old/drivers/net/via-rhine.c linux.dev/drivers/net/via-rhine.c
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--- linux.old/drivers/net/via-rhine.c 2006-06-08 20:21:20.000000000 +0200
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+++ linux.dev/drivers/net/via-rhine.c 2006-06-08 20:19:40.000000000 +0200
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@@ -142,7 +142,7 @@
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These may be modified when a driver module is loaded. */
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static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
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-static int max_interrupt_work = 20;
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+static int max_interrupt_work = 20000;
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/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
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Setting to > 1518 effectively disables this feature. */
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@ -0,0 +1,461 @@
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diff -urN linux.old/drivers/net/via-rhine.c linux.dev/drivers/net/via-rhine.c
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--- linux.old/drivers/net/via-rhine.c 2006-06-08 20:21:20.000000000 +0200
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+++ linux.dev/drivers/net/via-rhine.c 2006-06-08 20:19:40.000000000 +0200
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@@ -131,6 +131,10 @@
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- Fix Tx engine race for good
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- Craig Brind: Zero padded aligned buffers for short packets.
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+ OpenWrt Version (Felix Fietkau <nbd@openwrt.org>)
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+ - Performance improvements
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+ - NAPI polling
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+
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*/
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#define DRV_NAME "via-rhine"
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@@ -142,7 +146,6 @@
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These may be modified when a driver module is loaded. */
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static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
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-static int max_interrupt_work = 20;
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/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
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Setting to > 1518 effectively disables this feature. */
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@@ -165,9 +168,9 @@
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Making the Tx ring too large decreases the effectiveness of channel
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bonding and packet priority.
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There are no ill effects from too-large receive rings. */
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-#define TX_RING_SIZE 16
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-#define TX_QUEUE_LEN 10 /* Limit ring entries actually used. */
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-#define RX_RING_SIZE 16
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+#define TX_RING_SIZE 128
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+#define TX_QUEUE_LEN 120 /* Limit ring entries actually used. */
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+#define RX_RING_SIZE 128
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/* Operational parameters that usually are not changed. */
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@@ -201,6 +204,7 @@
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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+#include <asm/unaligned.h>
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/* These identify the driver base version and may not be removed. */
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static char version[] __devinitdata =
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@@ -217,10 +221,8 @@
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MODULE_DESCRIPTION("VIA Rhine PCI Fast Ethernet driver");
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MODULE_LICENSE("GPL");
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-module_param(max_interrupt_work, int, 0);
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module_param(debug, int, 0);
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module_param(rx_copybreak, int, 0);
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-MODULE_PARM_DESC(max_interrupt_work, "VIA Rhine maximum events handled per interrupt");
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MODULE_PARM_DESC(debug, "VIA Rhine debug level (0-7)");
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MODULE_PARM_DESC(rx_copybreak, "VIA Rhine copy breakpoint for copy-only-tiny-frames");
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@@ -461,6 +463,8 @@
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struct tx_desc *tx_ring;
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dma_addr_t rx_ring_dma;
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dma_addr_t tx_ring_dma;
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+ u32 istat;
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+ u32 imask;
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/* The addresses of receive-in-place skbuffs. */
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struct sk_buff *rx_skbuff[RX_RING_SIZE];
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@@ -504,9 +508,10 @@
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static void rhine_check_media_task(struct net_device *dev);
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static int rhine_start_tx(struct sk_buff *skb, struct net_device *dev);
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static irqreturn_t rhine_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
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-static void rhine_tx(struct net_device *dev);
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-static void rhine_rx(struct net_device *dev);
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-static void rhine_error(struct net_device *dev, int intr_status);
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+static int rhine_poll(struct net_device *dev, int *budget);
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+static int rhine_tx(struct net_device *dev);
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+static int rhine_rx(struct net_device *dev);
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+static void rhine_error(struct net_device *dev);
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static void rhine_set_rx_mode(struct net_device *dev);
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static struct net_device_stats *rhine_get_stats(struct net_device *dev);
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static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
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@@ -601,6 +606,8 @@
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struct rhine_private *rp = netdev_priv(dev);
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void __iomem *ioaddr = rp->base;
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+ pci_enable_device(rp->pdev);
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+
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iowrite8(Cmd1Reset, ioaddr + ChipCmd1);
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IOSYNC;
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@@ -622,6 +629,28 @@
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"failed" : "succeeded");
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}
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+static inline void rhine_intr_enable(struct net_device *dev)
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+{
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+ struct rhine_private *rp = netdev_priv(dev);
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+ void __iomem *ioaddr = rp->base;
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+
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+ iowrite16(rp->imask = (IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow |
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+ IntrRxDropped | IntrRxNoBuf | IntrTxAborted |
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+ IntrTxDone | IntrTxError | IntrTxUnderrun |
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+ IntrPCIErr | IntrStatsMax | IntrLinkChange),
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+ ioaddr + IntrEnable);
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+}
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+
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+static inline void rhine_intr_disable(struct net_device *dev)
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+{
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+ struct rhine_private *rp = netdev_priv(dev);
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+ void __iomem *ioaddr = rp->base;
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+
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+ iowrite16(rp->imask = (IntrRxOverflow | IntrRxNoBuf | IntrTxAborted |
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+ IntrTxError | IntrTxUnderrun | IntrPCIErr | IntrStatsMax | IntrLinkChange),
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+ ioaddr + IntrEnable);
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+}
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+
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#ifdef USE_MMIO
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static void enable_mmio(long pioaddr, u32 quirks)
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{
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@@ -664,14 +693,26 @@
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}
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-#ifdef CONFIG_NET_POLL_CONTROLLER
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-static void rhine_poll(struct net_device *dev)
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+static int rhine_poll(struct net_device *dev, int *budget)
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{
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- disable_irq(dev->irq);
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- rhine_interrupt(dev->irq, (void *)dev, NULL);
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- enable_irq(dev->irq);
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+ unsigned int work_done, work_to_do = min(*budget, dev->quota);
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+ struct rhine_private *rp = netdev_priv(dev);
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+
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+ work_done = rhine_rx(dev);
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+
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+ if (rp->istat & (IntrTxErrSummary | IntrTxDone))
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+ rhine_tx(dev);
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+
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+ *budget -= work_done;
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+ dev->quota -= work_done;
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+
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+ if (work_done < work_to_do) {
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+ netif_rx_complete(dev);
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+ rhine_intr_enable(dev);
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+ }
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+
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+ return (work_done >= work_to_do);
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}
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-#endif
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static void rhine_hw_init(struct net_device *dev, long pioaddr)
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{
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@@ -850,11 +891,10 @@
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dev->ethtool_ops = &netdev_ethtool_ops;
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dev->tx_timeout = rhine_tx_timeout;
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dev->watchdog_timeo = TX_TIMEOUT;
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-#ifdef CONFIG_NET_POLL_CONTROLLER
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- dev->poll_controller = rhine_poll;
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-#endif
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- if (rp->quirks & rqRhineI)
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- dev->features |= NETIF_F_SG|NETIF_F_HW_CSUM;
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+ dev->poll = rhine_poll;
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+ dev->weight = 64;
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+
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+ dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
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INIT_WORK(&rp->tx_timeout_task,
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(void (*)(void *))rhine_tx_timeout_task, dev);
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@@ -904,6 +944,10 @@
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}
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}
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rp->mii_if.phy_id = phy_id;
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+
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+ // shut down until somebody really needs it
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+ iowrite8(0x80, ioaddr + 0xa1);
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+ pci_set_power_state(rp->pdev, 3);
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return 0;
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@@ -995,7 +1039,7 @@
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/* Fill in the Rx buffers. Handle allocation failure gracefully. */
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for (i = 0; i < RX_RING_SIZE; i++) {
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- struct sk_buff *skb = dev_alloc_skb(rp->rx_buf_sz);
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+ struct sk_buff *skb = dev_alloc_skb(rp->rx_buf_sz + 4);
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rp->rx_skbuff[i] = skb;
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if (skb == NULL)
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break;
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@@ -1115,11 +1159,7 @@
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rhine_set_rx_mode(dev);
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/* Enable interrupts by setting the interrupt mask. */
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- iowrite16(IntrRxDone | IntrRxErr | IntrRxEmpty| IntrRxOverflow |
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- IntrRxDropped | IntrRxNoBuf | IntrTxAborted |
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- IntrTxDone | IntrTxError | IntrTxUnderrun |
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- IntrPCIErr | IntrStatsMax | IntrLinkChange,
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- ioaddr + IntrEnable);
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+ rhine_intr_enable(dev);
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iowrite16(CmdStart | CmdTxOn | CmdRxOn | (Cmd1NoTxPoll << 8),
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ioaddr + ChipCmd);
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@@ -1230,6 +1270,7 @@
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mdio_read(dev, rp->mii_if.phy_id, MII_BMSR));
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netif_start_queue(dev);
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+ netif_poll_enable(dev);
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return 0;
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}
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@@ -1268,8 +1309,8 @@
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/* Reinitialize the hardware. */
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rhine_chip_reset(dev);
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init_registers(dev);
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-
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spin_unlock(&rp->lock);
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+
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enable_irq(rp->pdev->irq);
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dev->trans_start = jiffies;
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@@ -1363,69 +1404,56 @@
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struct net_device *dev = dev_instance;
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struct rhine_private *rp = netdev_priv(dev);
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void __iomem *ioaddr = rp->base;
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- u32 intr_status;
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- int boguscnt = max_interrupt_work;
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int handled = 0;
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- while ((intr_status = get_intr_status(dev))) {
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+ if ((rp->istat = (get_intr_status(dev) & rp->imask))) {
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handled = 1;
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/* Acknowledge all of the current interrupt sources ASAP. */
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- if (intr_status & IntrTxDescRace)
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+ if (rp->istat & IntrTxDescRace)
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iowrite8(0x08, ioaddr + IntrStatus2);
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- iowrite16(intr_status & 0xffff, ioaddr + IntrStatus);
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+ iowrite16(rp->istat & 0xffff, ioaddr + IntrStatus);
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IOSYNC;
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- if (debug > 4)
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- printk(KERN_DEBUG "%s: Interrupt, status %8.8x.\n",
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- dev->name, intr_status);
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+ if (likely(rp->istat & ((IntrRxDone | IntrRxErr | IntrRxDropped |
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+ IntrRxWakeUp | IntrRxEmpty | IntrRxNoBuf |
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+ IntrTxErrSummary | IntrTxDone)))) {
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+
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+ rhine_intr_disable(dev);
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- if (intr_status & (IntrRxDone | IntrRxErr | IntrRxDropped |
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- IntrRxWakeUp | IntrRxEmpty | IntrRxNoBuf))
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- rhine_rx(dev);
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-
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- if (intr_status & (IntrTxErrSummary | IntrTxDone)) {
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- if (intr_status & IntrTxErrSummary) {
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- /* Avoid scavenging before Tx engine turned off */
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- RHINE_WAIT_FOR(!(ioread8(ioaddr+ChipCmd) & CmdTxOn));
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- if (debug > 2 &&
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- ioread8(ioaddr+ChipCmd) & CmdTxOn)
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- printk(KERN_WARNING "%s: "
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- "rhine_interrupt() Tx engine"
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- "still on.\n", dev->name);
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- }
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- rhine_tx(dev);
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+ if (likely(netif_rx_schedule_prep(dev)))
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+ __netif_rx_schedule(dev);
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}
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/* Abnormal error summary/uncommon events handlers. */
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- if (intr_status & (IntrPCIErr | IntrLinkChange |
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+ if (unlikely(rp->istat & (IntrPCIErr | IntrLinkChange |
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IntrStatsMax | IntrTxError | IntrTxAborted |
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- IntrTxUnderrun | IntrTxDescRace))
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- rhine_error(dev, intr_status);
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-
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- if (--boguscnt < 0) {
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- printk(KERN_WARNING "%s: Too much work at interrupt, "
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- "status=%#8.8x.\n",
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- dev->name, intr_status);
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- break;
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- }
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+ IntrTxUnderrun | IntrTxDescRace)))
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+ rhine_error(dev);
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}
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- if (debug > 3)
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- printk(KERN_DEBUG "%s: exiting interrupt, status=%8.8x.\n",
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- dev->name, ioread16(ioaddr + IntrStatus));
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return IRQ_RETVAL(handled);
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}
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/* This routine is logically part of the interrupt handler, but isolated
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for clarity. */
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-static void rhine_tx(struct net_device *dev)
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+static int rhine_tx(struct net_device *dev)
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{
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struct rhine_private *rp = netdev_priv(dev);
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int txstatus = 0, entry = rp->dirty_tx % TX_RING_SIZE;
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+ void __iomem *ioaddr = rp->base;
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+ int done = 0;
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- spin_lock(&rp->lock);
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+ /* Avoid scavenging before Tx engine turned off */
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+ RHINE_WAIT_FOR(!(ioread8(ioaddr+ChipCmd) & CmdTxOn));
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+ if (debug > 2 &&
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+ ioread8(ioaddr+ChipCmd) & CmdTxOn)
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+ printk(KERN_WARNING "%s: "
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+ "rhine_interrupt() Tx engine"
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+ "still on.\n", dev->name);
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+
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+ spin_lock_irq(&rp->lock);
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/* find and cleanup dirty tx descriptors */
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while (rp->dirty_tx != rp->cur_tx) {
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txstatus = le32_to_cpu(rp->tx_ring[entry].tx_status);
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@@ -1462,6 +1490,7 @@
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txstatus & 0xF);
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rp->stats.tx_bytes += rp->tx_skbuff[entry]->len;
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rp->stats.tx_packets++;
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+ done++;
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}
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/* Free the original skb. */
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if (rp->tx_skbuff_dma[entry]) {
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@@ -1470,23 +1499,25 @@
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rp->tx_skbuff[entry]->len,
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PCI_DMA_TODEVICE);
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}
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- dev_kfree_skb_irq(rp->tx_skbuff[entry]);
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+ dev_kfree_skb_any(rp->tx_skbuff[entry]);
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rp->tx_skbuff[entry] = NULL;
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entry = (++rp->dirty_tx) % TX_RING_SIZE;
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}
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+ spin_unlock_irq(&rp->lock);
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+
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if ((rp->cur_tx - rp->dirty_tx) < TX_QUEUE_LEN - 4)
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netif_wake_queue(dev);
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- 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)
|
||||||
Loading…
Reference in New Issue
Block a user