From a6676019a794eac967a967c1206a57824b180c9a Mon Sep 17 00:00:00 2001 From: Francois Romieu Date: Sun, 6 Jul 2008 20:54:45 -0700 Subject: [PATCH] starfire: delete non NAPI code from the driver. Signed-off-by: Francois Romieu Acked-by: Jeff Garzik Signed-off-by: David S. Miller --- drivers/net/Kconfig | 14 ------ drivers/net/starfire.c | 111 +++++++++++++++++------------------------ 2 files changed, 45 insertions(+), 80 deletions(-) diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 1fe47a3bb6f5..9f7442fba47d 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -1334,20 +1334,6 @@ config ADAPTEC_STARFIRE To compile this driver as a module, choose M here: the module will be called starfire. This is recommended. -config ADAPTEC_STARFIRE_NAPI - bool "Use Rx Polling (NAPI) (EXPERIMENTAL)" - depends on ADAPTEC_STARFIRE && EXPERIMENTAL - help - NAPI is a new driver API designed to reduce CPU and interrupt load - when the driver is receiving lots of packets from the card. It is - still somewhat experimental and thus not yet enabled by default. - - If your estimated Rx load is 10kpps or more, or if the card will be - deployed on potentially unfriendly networks (e.g. in a firewall), - then say Y here. - - If in doubt, say N. - config AC3200 tristate "Ansel Communications EISA 3200 support (EXPERIMENTAL)" depends on NET_PCI && (ISA || EISA) && EXPERIMENTAL diff --git a/drivers/net/starfire.c b/drivers/net/starfire.c index 2038f38dc04b..1d2ef8f47780 100644 --- a/drivers/net/starfire.c +++ b/drivers/net/starfire.c @@ -27,8 +27,8 @@ */ #define DRV_NAME "starfire" -#define DRV_VERSION "2.0" -#define DRV_RELDATE "June 27, 2006" +#define DRV_VERSION "2.1" +#define DRV_RELDATE "July 6, 2008" #include #include @@ -69,10 +69,6 @@ #define VLAN_SUPPORT #endif -#ifndef CONFIG_ADAPTEC_STARFIRE_NAPI -#undef HAVE_NETDEV_POLL -#endif - /* The user-configurable values. These may be modified when a driver module is loaded.*/ @@ -177,44 +173,6 @@ static int full_duplex[MAX_UNITS] = {0, }; #define skb_first_frag_len(skb) skb_headlen(skb) #define skb_num_frags(skb) (skb_shinfo(skb)->nr_frags + 1) -#ifdef HAVE_NETDEV_POLL -#define init_poll(dev, np) \ - netif_napi_add(dev, &np->napi, netdev_poll, max_interrupt_work) -#define netdev_rx(dev, np, ioaddr) \ -do { \ - u32 intr_enable; \ - if (netif_rx_schedule_prep(dev, &np->napi)) { \ - __netif_rx_schedule(dev, &np->napi); \ - intr_enable = readl(ioaddr + IntrEnable); \ - intr_enable &= ~(IntrRxDone | IntrRxEmpty); \ - writel(intr_enable, ioaddr + IntrEnable); \ - readl(ioaddr + IntrEnable); /* flush PCI posting buffers */ \ - } else { \ - /* Paranoia check */ \ - intr_enable = readl(ioaddr + IntrEnable); \ - if (intr_enable & (IntrRxDone | IntrRxEmpty)) { \ - printk(KERN_INFO "%s: interrupt while in polling mode!\n", dev->name); \ - intr_enable &= ~(IntrRxDone | IntrRxEmpty); \ - writel(intr_enable, ioaddr + IntrEnable); \ - } \ - } \ -} while (0) -#define netdev_receive_skb(skb) netif_receive_skb(skb) -#define vlan_netdev_receive_skb(skb, vlgrp, vlid) vlan_hwaccel_receive_skb(skb, vlgrp, vlid) -static int netdev_poll(struct napi_struct *napi, int budget); -#else /* not HAVE_NETDEV_POLL */ -#define init_poll(dev, np) -#define netdev_receive_skb(skb) netif_rx(skb) -#define vlan_netdev_receive_skb(skb, vlgrp, vlid) vlan_hwaccel_rx(skb, vlgrp, vlid) -#define netdev_rx(dev, np, ioaddr) \ -do { \ - int quota = np->dirty_rx + RX_RING_SIZE - np->cur_rx; \ - __netdev_rx(dev, "a);\ -} while (0) -#endif /* not HAVE_NETDEV_POLL */ -/* end of compatibility code */ - - /* These identify the driver base version and may not be removed. */ static char version[] = KERN_INFO "starfire.c:v1.03 7/26/2000 Written by Donald Becker \n" @@ -635,6 +593,7 @@ static int start_tx(struct sk_buff *skb, struct net_device *dev); static irqreturn_t intr_handler(int irq, void *dev_instance); static void netdev_error(struct net_device *dev, int intr_status); static int __netdev_rx(struct net_device *dev, int *quota); +static int netdev_poll(struct napi_struct *napi, int budget); static void refill_rx_ring(struct net_device *dev); static void netdev_error(struct net_device *dev, int intr_status); static void set_rx_mode(struct net_device *dev); @@ -851,7 +810,7 @@ static int __devinit starfire_init_one(struct pci_dev *pdev, dev->hard_start_xmit = &start_tx; dev->tx_timeout = tx_timeout; dev->watchdog_timeo = TX_TIMEOUT; - init_poll(dev, np); + netif_napi_add(dev, &np->napi, netdev_poll, max_interrupt_work); dev->stop = &netdev_close; dev->get_stats = &get_stats; dev->set_multicast_list = &set_rx_mode; @@ -1054,9 +1013,8 @@ static int netdev_open(struct net_device *dev) writel(np->intr_timer_ctrl, ioaddr + IntrTimerCtrl); -#ifdef HAVE_NETDEV_POLL napi_enable(&np->napi); -#endif + netif_start_queue(dev); if (debug > 1) @@ -1330,8 +1288,28 @@ static irqreturn_t intr_handler(int irq, void *dev_instance) handled = 1; - if (intr_status & (IntrRxDone | IntrRxEmpty)) - netdev_rx(dev, np, ioaddr); + if (intr_status & (IntrRxDone | IntrRxEmpty)) { + u32 enable; + + if (likely(netif_rx_schedule_prep(dev, &np->napi))) { + __netif_rx_schedule(dev, &np->napi); + enable = readl(ioaddr + IntrEnable); + enable &= ~(IntrRxDone | IntrRxEmpty); + writel(enable, ioaddr + IntrEnable); + /* flush PCI posting buffers */ + readl(ioaddr + IntrEnable); + } else { + /* Paranoia check */ + enable = readl(ioaddr + IntrEnable); + if (enable & (IntrRxDone | IntrRxEmpty)) { + printk(KERN_INFO + "%s: interrupt while in poll!\n", + dev->name); + enable &= ~(IntrRxDone | IntrRxEmpty); + writel(enable, ioaddr + IntrEnable); + } + } + } /* Scavenge the skbuff list based on the Tx-done queue. There are redundant checks here that may be cleaned up @@ -1411,8 +1389,10 @@ static irqreturn_t intr_handler(int irq, void *dev_instance) } -/* This routine is logically part of the interrupt/poll handler, but separated - for clarity, code sharing between NAPI/non-NAPI, and better register allocation. */ +/* + * This routine is logically part of the interrupt/poll handler, but separated + * for clarity and better register allocation. + */ static int __netdev_rx(struct net_device *dev, int *quota) { struct netdev_private *np = netdev_priv(dev); @@ -1507,13 +1487,20 @@ static int __netdev_rx(struct net_device *dev, int *quota) } #ifdef VLAN_SUPPORT if (np->vlgrp && le16_to_cpu(desc->status2) & 0x0200) { - if (debug > 4) - printk(KERN_DEBUG " netdev_rx() vlanid = %d\n", le16_to_cpu(desc->vlanid)); - /* vlan_netdev_receive_skb() expects a packet with the VLAN tag stripped out */ - vlan_netdev_receive_skb(skb, np->vlgrp, le16_to_cpu(desc->vlanid)); + u16 vlid = le16_to_cpu(desc->vlanid); + + if (debug > 4) { + printk(KERN_DEBUG " netdev_rx() vlanid = %d\n", + vlid); + } + /* + * vlan_hwaccel_rx expects a packet with the VLAN tag + * stripped out. + */ + vlan_hwaccel_rx(skb, np->vlgrp, vlid); } else #endif /* VLAN_SUPPORT */ - netdev_receive_skb(skb); + netif_receive_skb(skb); dev->last_rx = jiffies; np->stats.rx_packets++; @@ -1532,8 +1519,6 @@ static int __netdev_rx(struct net_device *dev, int *quota) return retcode; } - -#ifdef HAVE_NETDEV_POLL static int netdev_poll(struct napi_struct *napi, int budget) { struct netdev_private *np = container_of(napi, struct netdev_private, napi); @@ -1564,8 +1549,6 @@ static int netdev_poll(struct napi_struct *napi, int budget) /* Restart Rx engine if stopped. */ return budget - quota; } -#endif /* HAVE_NETDEV_POLL */ - static void refill_rx_ring(struct net_device *dev) { @@ -1906,9 +1889,8 @@ static int netdev_close(struct net_device *dev) int i; netif_stop_queue(dev); -#ifdef HAVE_NETDEV_POLL + napi_disable(&np->napi); -#endif if (debug > 1) { printk(KERN_DEBUG "%s: Shutting down ethercard, Intr status %#8.8x.\n", @@ -2044,11 +2026,8 @@ static int __init starfire_init (void) /* when a module, this is printed whether or not devices are found in probe */ #ifdef MODULE printk(version); -#ifdef HAVE_NETDEV_POLL + printk(KERN_INFO DRV_NAME ": polling (NAPI) enabled\n"); -#else - printk(KERN_INFO DRV_NAME ": polling (NAPI) disabled\n"); -#endif #endif /* we can do this test only at run-time... sigh */ -- 2.20.1