diff options
| -rw-r--r-- | drivers/net/sungem.c | 889 | ||||
| -rw-r--r-- | drivers/net/sungem.h | 25 |
2 files changed, 373 insertions, 541 deletions
diff --git a/drivers/net/sungem.c b/drivers/net/sungem.c index ab593009926..f0bcbe4bce4 100644 --- a/drivers/net/sungem.c +++ b/drivers/net/sungem.c @@ -10,25 +10,6 @@ * NAPI and NETPOLL support * (C) 2004 by Eric Lemoine (eric.lemoine@gmail.com) * - * TODO: - * - Now that the driver was significantly simplified, I need to rework - * the locking. I'm sure we don't need _2_ spinlocks, and we probably - * can avoid taking most of them for so long period of time (and schedule - * instead). The main issues at this point are caused by the netdev layer - * though: - * - * gem_change_mtu() and gem_set_multicast() are called with a read_lock() - * help by net/core/dev.c, thus they can't schedule. That means they can't - * call napi_disable() neither, thus force gem_poll() to keep a spinlock - * where it could have been dropped. change_mtu especially would love also to - * be able to msleep instead of horrid locked delays when resetting the HW, - * but that read_lock() makes it impossible, unless I defer it's action to - * the reset task, which means it'll be asynchronous (won't take effect until - * the system schedules a bit). - * - * Also, it would probably be possible to also remove most of the long-life - * locking in open/resume code path (gem_reinit_chip) by beeing more careful - * about when we can start taking interrupts or get xmit() called... */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt @@ -57,7 +38,6 @@ #include <linux/workqueue.h> #include <linux/if_vlan.h> #include <linux/bitops.h> -#include <linux/mutex.h> #include <linux/mm.h> #include <linux/gfp.h> @@ -95,12 +75,11 @@ SUPPORTED_Pause | SUPPORTED_Autoneg) #define DRV_NAME "sungem" -#define DRV_VERSION "0.98" -#define DRV_RELDATE "8/24/03" -#define DRV_AUTHOR "David S. Miller (davem@redhat.com)" +#define DRV_VERSION "1.0" +#define DRV_AUTHOR "David S. Miller <davem@redhat.com>" static char version[] __devinitdata = - DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n"; + DRV_NAME ".c:v" DRV_VERSION " " DRV_AUTHOR "\n"; MODULE_AUTHOR(DRV_AUTHOR); MODULE_DESCRIPTION("Sun GEM Gbit ethernet driver"); @@ -218,6 +197,7 @@ static inline void gem_disable_ints(struct gem *gp) { /* Disable all interrupts, including TXDONE */ writel(GREG_STAT_NAPI | GREG_STAT_TXDONE, gp->regs + GREG_IMASK); + (void)readl(gp->regs + GREG_IMASK); /* write posting */ } static void gem_get_cell(struct gem *gp) @@ -247,6 +227,29 @@ static void gem_put_cell(struct gem *gp) #endif /* CONFIG_PPC_PMAC */ } +static inline void gem_netif_stop(struct gem *gp) +{ + gp->dev->trans_start = jiffies; /* prevent tx timeout */ + napi_disable(&gp->napi); + netif_tx_disable(gp->dev); +} + +static inline void gem_netif_start(struct gem *gp) +{ + /* NOTE: unconditional netif_wake_queue is only + * appropriate so long as all callers are assured to + * have free tx slots. + */ + netif_wake_queue(gp->dev); + napi_enable(&gp->napi); +} + +static void gem_schedule_reset(struct gem *gp) +{ + gp->reset_task_pending = 1; + schedule_work(&gp->reset_task); +} + static void gem_handle_mif_event(struct gem *gp, u32 reg_val, u32 changed_bits) { if (netif_msg_intr(gp)) @@ -604,56 +607,46 @@ static int gem_abnormal_irq(struct net_device *dev, struct gem *gp, u32 gem_stat gp->dev->name); dev->stats.rx_errors++; - goto do_reset; + return 1; } if (gem_status & GREG_STAT_PCS) { if (gem_pcs_interrupt(dev, gp, gem_status)) - goto do_reset; + return 1; } if (gem_status & GREG_STAT_TXMAC) { if (gem_txmac_interrupt(dev, gp, gem_status)) - goto do_reset; + return 1; } if (gem_status & GREG_STAT_RXMAC) { if (gem_rxmac_interrupt(dev, gp, gem_status)) - goto do_reset; + return 1; } if (gem_status & GREG_STAT_MAC) { if (gem_mac_interrupt(dev, gp, gem_status)) - goto do_reset; + return 1; } if (gem_status & GREG_STAT_MIF) { if (gem_mif_interrupt(dev, gp, gem_status)) - goto do_reset; + return 1; } if (gem_status & GREG_STAT_PCIERR) { if (gem_pci_interrupt(dev, gp, gem_status)) - goto do_reset; + return 1; } return 0; - -do_reset: - gp->reset_task_pending = 1; - schedule_work(&gp->reset_task); - - return 1; } static __inline__ void gem_tx(struct net_device *dev, struct gem *gp, u32 gem_status) { int entry, limit; - if (netif_msg_intr(gp)) - printk(KERN_DEBUG "%s: tx interrupt, gem_status: 0x%x\n", - gp->dev->name, gem_status); - entry = gp->tx_old; limit = ((gem_status & GREG_STAT_TXNR) >> GREG_STAT_TXNR_SHIFT); while (entry != limit) { @@ -697,13 +690,27 @@ static __inline__ void gem_tx(struct net_device *dev, struct gem *gp, u32 gem_st } dev->stats.tx_packets++; - dev_kfree_skb_irq(skb); + dev_kfree_skb(skb); } gp->tx_old = entry; - if (netif_queue_stopped(dev) && - TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1)) - netif_wake_queue(dev); + /* Need to make the tx_old update visible to gem_start_xmit() + * before checking for netif_queue_stopped(). Without the + * memory barrier, there is a small possibility that gem_start_xmit() + * will miss it and cause the queue to be stopped forever. + */ + smp_mb(); + + if (unlikely(netif_queue_stopped(dev) && + TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1))) { + struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); + + __netif_tx_lock(txq, smp_processor_id()); + if (netif_queue_stopped(dev) && + TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1)) + netif_wake_queue(dev); + __netif_tx_unlock(txq); + } } static __inline__ void gem_post_rxds(struct gem *gp, int limit) @@ -736,6 +743,21 @@ static __inline__ void gem_post_rxds(struct gem *gp, int limit) } } +#define ALIGNED_RX_SKB_ADDR(addr) \ + ((((unsigned long)(addr) + (64UL - 1UL)) & ~(64UL - 1UL)) - (unsigned long)(addr)) +static __inline__ struct sk_buff *gem_alloc_skb(struct net_device *dev, int size, + gfp_t gfp_flags) +{ + struct sk_buff *skb = alloc_skb(size + 64, gfp_flags); + + if (likely(skb)) { + unsigned long offset = ALIGNED_RX_SKB_ADDR(skb->data); + skb_reserve(skb, offset); + skb->dev = dev; + } + return skb; +} + static int gem_rx(struct gem *gp, int work_to_do) { struct net_device *dev = gp->dev; @@ -799,7 +821,7 @@ static int gem_rx(struct gem *gp, int work_to_do) if (len > RX_COPY_THRESHOLD) { struct sk_buff *new_skb; - new_skb = gem_alloc_skb(RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC); + new_skb = gem_alloc_skb(dev, RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC); if (new_skb == NULL) { drops++; goto drop_it; @@ -808,7 +830,6 @@ static int gem_rx(struct gem *gp, int work_to_do) RX_BUF_ALLOC_SIZE(gp), PCI_DMA_FROMDEVICE); gp->rx_skbs[entry] = new_skb; - new_skb->dev = gp->dev; skb_put(new_skb, (gp->rx_buf_sz + RX_OFFSET)); rxd->buffer = cpu_to_le64(pci_map_page(gp->pdev, virt_to_page(new_skb->data), @@ -820,7 +841,7 @@ static int gem_rx(struct gem *gp, int work_to_do) /* Trim the original skb for the netif. */ skb_trim(skb, len); } else { - struct sk_buff *copy_skb = dev_alloc_skb(len + 2); + struct sk_buff *copy_skb = netdev_alloc_skb(dev, len + 2); if (copy_skb == NULL) { drops++; @@ -842,7 +863,7 @@ static int gem_rx(struct gem *gp, int work_to_do) skb->ip_summed = CHECKSUM_COMPLETE; skb->protocol = eth_type_trans(skb, gp->dev); - netif_receive_skb(skb); + napi_gro_receive(&gp->napi, skb); dev->stats.rx_packets++; dev->stats.rx_bytes += len; @@ -865,28 +886,32 @@ static int gem_poll(struct napi_struct *napi, int budget) { struct gem *gp = container_of(napi, struct gem, napi); struct net_device *dev = gp->dev; - unsigned long flags; int work_done; - /* - * NAPI locking nightmare: See comment at head of driver - */ - spin_lock_irqsave(&gp->lock, flags); - work_done = 0; do { /* Handle anomalies */ - if (gp->status & GREG_STAT_ABNORMAL) { - if (gem_abnormal_irq(dev, gp, gp->status)) - break; + if (unlikely(gp->status & GREG_STAT_ABNORMAL)) { + struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); + int reset; + + /* We run the abnormal interrupt handling code with + * the Tx lock. It only resets the Rx portion of the + * chip, but we need to guard it against DMA being + * restarted by the link poll timer + */ + __netif_tx_lock(txq, smp_processor_id()); + reset = gem_abnormal_irq(dev, gp, gp->status); + __netif_tx_unlock(txq); + if (reset) { + gem_schedule_reset(gp); + napi_complete(napi); + return work_done; + } } /* Run TX completion thread */ - spin_lock(&gp->tx_lock); gem_tx(dev, gp, gp->status); - spin_unlock(&gp->tx_lock); - - spin_unlock_irqrestore(&gp->lock, flags); /* Run RX thread. We don't use any locking here, * code willing to do bad things - like cleaning the @@ -898,16 +923,12 @@ static int gem_poll(struct napi_struct *napi, int budget) if (work_done >= budget) return work_done; - spin_lock_irqsave(&gp->lock, flags); - gp->status = readl(gp->regs + GREG_STAT); } while (gp->status & GREG_STAT_NAPI); - __napi_complete(napi); + napi_complete(napi); gem_enable_ints(gp); - spin_unlock_irqrestore(&gp->lock, flags); - return work_done; } @@ -915,32 +936,23 @@ static irqreturn_t gem_interrupt(int irq, void *dev_id) { struct net_device *dev = dev_id; struct gem *gp = netdev_priv(dev); - unsigned long flags; - - /* Swallow interrupts when shutting the chip down, though - * that shouldn't happen, we should have done free_irq() at - * this point... - */ - if (!gp->running) - return IRQ_HANDLED; - - spin_lock_irqsave(&gp->lock, flags); if (napi_schedule_prep(&gp->napi)) { u32 gem_status = readl(gp->regs + GREG_STAT); - if (gem_status == 0) { + if (unlikely(gem_status == 0)) { napi_enable(&gp->napi); - spin_unlock_irqrestore(&gp->lock, flags); return IRQ_NONE; } + if (netif_msg_intr(gp)) + printk(KERN_DEBUG "%s: gem_interrupt() gem_status: 0x%x\n", + gp->dev->name, gem_status); + gp->status = gem_status; gem_disable_ints(gp); __napi_schedule(&gp->napi); } - spin_unlock_irqrestore(&gp->lock, flags); - /* If polling was disabled at the time we received that * interrupt, we may return IRQ_HANDLED here while we * should return IRQ_NONE. No big deal... @@ -951,10 +963,11 @@ static irqreturn_t gem_interrupt(int irq, void *dev_id) #ifdef CONFIG_NET_POLL_CONTROLLER static void gem_poll_controller(struct net_device *dev) { - /* gem_interrupt is safe to reentrance so no need - * to disable_irq here. - */ - gem_interrupt(dev->irq, dev); + struct gem *gp = netdev_priv(dev); + + disable_irq(gp->pdev->irq); + gem_interrupt(gp->pdev->irq, dev); + enable_irq(gp->pdev->irq); } #endif @@ -963,10 +976,7 @@ static void gem_tx_timeout(struct net_device *dev) struct gem *gp = netdev_priv(dev); netdev_err(dev, "transmit timed out, resetting\n"); - if (!gp->running) { - netdev_err(dev, "hrm.. hw not running !\n"); - return; - } + netdev_err(dev, "TX_STATE[%08x:%08x:%08x]\n", readl(gp->regs + TXDMA_CFG), readl(gp->regs + MAC_TXSTAT), @@ -976,14 +986,7 @@ static void gem_tx_timeout(struct net_device *dev) readl(gp->regs + MAC_RXSTAT), readl(gp->regs + MAC_RXCFG)); - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - - gp->reset_task_pending = 1; - schedule_work(&gp->reset_task); - - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); + gem_schedule_reset(gp); } static __inline__ int gem_intme(int entry) @@ -1001,7 +1004,6 @@ static netdev_tx_t gem_start_xmit(struct sk_buff *skb, struct gem *gp = netdev_priv(dev); int entry; u64 ctrl; - unsigned long flags; ctrl = 0; if (skb->ip_summed == CHECKSUM_PARTIAL) { @@ -1013,21 +1015,12 @@ static netdev_tx_t gem_start_xmit(struct sk_buff *skb, (csum_stuff_off << 21)); } - if (!spin_trylock_irqsave(&gp->tx_lock, flags)) { - /* Tell upper layer to requeue */ - return NETDEV_TX_LOCKED; - } - /* We raced with gem_do_stop() */ - if (!gp->running) { - spin_unlock_irqrestore(&gp->tx_lock, flags); - return NETDEV_TX_BUSY; - } - - /* This is a hard error, log it. */ - if (TX_BUFFS_AVAIL(gp) <= (skb_shinfo(skb)->nr_frags + 1)) { - netif_stop_queue(dev); - spin_unlock_irqrestore(&gp->tx_lock, flags); - netdev_err(dev, "BUG! Tx Ring full when queue awake!\n"); + if (unlikely(TX_BUFFS_AVAIL(gp) <= (skb_shinfo(skb)->nr_frags + 1))) { + /* This is a hard error, log it. */ + if (!netif_queue_stopped(dev)) { + netif_stop_queue(dev); + netdev_err(dev, "BUG! Tx Ring full when queue awake!\n"); + } return NETDEV_TX_BUSY; } @@ -1104,17 +1097,23 @@ static netdev_tx_t gem_start_xmit(struct sk_buff *skb, } gp->tx_new = entry; - if (TX_BUFFS_AVAIL(gp) <= (MAX_SKB_FRAGS + 1)) + if (unlikely(TX_BUFFS_AVAIL(gp) <= (MAX_SKB_FRAGS + 1))) { netif_stop_queue(dev); + /* netif_stop_queue() must be done before checking + * checking tx index in TX_BUFFS_AVAIL() below, because + * in gem_tx(), we update tx_old before checking for + * netif_queue_stopped(). + */ + smp_mb(); + if (TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1)) + netif_wake_queue(dev); + } if (netif_msg_tx_queued(gp)) printk(KERN_DEBUG "%s: tx queued, slot %d, skblen %d\n", dev->name, entry, skb->len); mb(); writel(gp->tx_new, gp->regs + TXDMA_KICK); - spin_unlock_irqrestore(&gp->tx_lock, flags); - - dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */ return NETDEV_TX_OK; } @@ -1184,7 +1183,6 @@ static void gem_pcs_reinit_adv(struct gem *gp) #define STOP_TRIES 32 -/* Must be invoked under gp->lock and gp->tx_lock. */ static void gem_reset(struct gem *gp) { int limit; @@ -1213,7 +1211,6 @@ static void gem_reset(struct gem *gp) gem_pcs_reinit_adv(gp); } -/* Must be invoked under gp->lock and gp->tx_lock. */ static void gem_start_dma(struct gem *gp) { u32 val; @@ -1236,8 +1233,7 @@ static void gem_start_dma(struct gem *gp) writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); } -/* Must be invoked under gp->lock and gp->tx_lock. DMA won't be - * actually stopped before about 4ms tho ... +/* DMA won't be actually stopped before about 4ms tho ... */ static void gem_stop_dma(struct gem *gp) { @@ -1259,7 +1255,6 @@ static void gem_stop_dma(struct gem *gp) } -/* Must be invoked under gp->lock and gp->tx_lock. */ // XXX dbl check what that function should do when called on PCS PHY static void gem_begin_auto_negotiation(struct gem *gp, struct ethtool_cmd *ep) { @@ -1319,7 +1314,7 @@ start_aneg: /* If we are asleep, we don't try to actually setup the PHY, we * just store the settings */ - if (gp->asleep) { + if (!netif_device_present(gp->dev)) { gp->phy_mii.autoneg = gp->want_autoneg = autoneg; gp->phy_mii.speed = speed; gp->phy_mii.duplex = duplex; @@ -1345,13 +1340,12 @@ non_mii: /* A link-up condition has occurred, initialize and enable the * rest of the chip. - * - * Must be invoked under gp->lock and gp->tx_lock. */ static int gem_set_link_modes(struct gem *gp) { - u32 val; + struct netdev_queue *txq = netdev_get_tx_queue(gp->dev, 0); int full_duplex, speed, pause; + u32 val; full_duplex = 0; speed = SPEED_10; @@ -1375,8 +1369,11 @@ static int gem_set_link_modes(struct gem *gp) netif_info(gp, link, gp->dev, "Link is up at %d Mbps, %s-duplex\n", speed, (full_duplex ? "full" : "half")); - if (!gp->running) - return 0; + + /* We take the tx queue lock to avoid collisions between + * this code, the tx path and the NAPI-driven error path + */ + __netif_tx_lock(txq, smp_processor_id()); val = (MAC_TXCFG_EIPG0 | MAC_TXCFG_NGU); if (full_duplex) { @@ -1425,18 +1422,6 @@ static int gem_set_link_modes(struct gem *gp) pause = 1; } - if (netif_msg_link(gp)) { - if (pause) { - netdev_info(gp->dev, - "Pause is enabled (rxfifo: %d off: %d on: %d)\n", - gp->rx_fifo_sz, - gp->rx_pause_off, - gp->rx_pause_on); - } else { - netdev_info(gp->dev, "Pause is disabled\n"); - } - } - if (!full_duplex) writel(512, gp->regs + MAC_STIME); else @@ -1450,10 +1435,23 @@ static int gem_set_link_modes(struct gem *gp) gem_start_dma(gp); + __netif_tx_unlock(txq); + + if (netif_msg_link(gp)) { + if (pause) { + netdev_info(gp->dev, + "Pause is enabled (rxfifo: %d off: %d on: %d)\n", + gp->rx_fifo_sz, + gp->rx_pause_off, + gp->rx_pause_on); + } else { + netdev_info(gp->dev, "Pause is disabled\n"); + } + } + return 0; } -/* Must be invoked under gp->lock and gp->tx_lock. */ static int gem_mdio_link_not_up(struct gem *gp) { switch (gp->lstate) { @@ -1501,20 +1499,12 @@ static int gem_mdio_link_not_up(struct gem *gp) static void gem_link_timer(unsigned long data) { struct gem *gp = (struct gem *) data; + struct net_device *dev = gp->dev; int restart_aneg = 0; - if (gp->asleep) - return; - - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - gem_get_cell(gp); - - /* If the reset task is still pending, we just - * reschedule the link timer - */ + /* There's no point doing anything if we're going to be reset */ if (gp->reset_task_pending) - goto restart; + return; if (gp->phy_type == phy_serialink || gp->phy_type == phy_serdes) { @@ -1528,7 +1518,7 @@ static void gem_link_timer(unsigned long data) goto restart; gp->lstate = link_up; - netif_carrier_on(gp->dev); + netif_carrier_on(dev); (void)gem_set_link_modes(gp); } goto restart; @@ -1544,12 +1534,12 @@ static void gem_link_timer(unsigned long data) gp->last_forced_speed = gp->phy_mii.speed; gp->timer_ticks = 5; if (netif_msg_link(gp)) - netdev_info(gp->dev, + netdev_info(dev, "Got link after fallback, retrying autoneg once...\n"); gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, gp->phy_mii.advertising); } else if (gp->lstate != link_up) { gp->lstate = link_up; - netif_carrier_on(gp->dev); + netif_carrier_on(dev); if (gem_set_link_modes(gp)) restart_aneg = 1; } @@ -1559,11 +1549,11 @@ static void gem_link_timer(unsigned long data) */ if (gp->lstate == link_up) { gp->lstate = link_down; - netif_info(gp, link, gp->dev, "Link down\n"); - netif_carrier_off(gp->dev); - gp->reset_task_pending = 1; - schedule_work(&gp->reset_task); - restart_aneg = 1; + netif_info(gp, link, dev, "Link down\n"); + netif_carrier_off(dev); + gem_schedule_reset(gp); + /* The reset task will restart the timer */ + return; } else if (++gp->timer_ticks > 10) { if (found_mii_phy(gp)) restart_aneg = gem_mdio_link_not_up(gp); @@ -1573,17 +1563,12 @@ static void gem_link_timer(unsigned long data) } if (restart_aneg) { gem_begin_auto_negotiation(gp, NULL); - goto out_unlock; + return; } restart: mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); -out_unlock: - gem_put_cell(gp); - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); } -/* Must be invoked under gp->lock and gp->tx_lock. */ static void gem_clean_rings(struct gem *gp) { struct gem_init_block *gb = gp->init_block; @@ -1634,7 +1619,6 @@ static void gem_clean_rings(struct gem *gp) } } -/* Must be invoked under gp->lock and gp->tx_lock. */ static void gem_init_rings(struct gem *gp) { struct gem_init_block *gb = gp->init_block; @@ -1653,7 +1637,7 @@ static void gem_init_rings(struct gem *gp) struct sk_buff *skb; struct gem_rxd *rxd = &gb->rxd[i]; - skb = gem_alloc_skb(RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC); + skb = gem_alloc_skb(dev, RX_BUF_ALLOC_SIZE(gp), GFP_KERNEL); if (!skb) { rxd->buffer = 0; rxd->status_word = 0; @@ -1661,7 +1645,6 @@ static void gem_init_rings(struct gem *gp) } gp->rx_skbs[i] = skb; - skb->dev = dev; skb_put(skb, (gp->rx_buf_sz + RX_OFFSET)); dma_addr = pci_map_page(gp->pdev, virt_to_page(skb->data), @@ -1737,7 +1720,7 @@ static void gem_init_phy(struct gem *gp) if (gp->phy_type == phy_mii_mdio0 || gp->phy_type == phy_mii_mdio1) { - // XXX check for errors + /* Reset and detect MII PHY */ mii_phy_probe(&gp->phy_mii, gp->mii_phy_addr); /* Init PHY */ @@ -1753,13 +1736,15 @@ static void gem_init_phy(struct gem *gp) gp->lstate = link_down; netif_carrier_off(gp->dev); - /* Can I advertise gigabit here ? I'd need BCM PHY docs... */ - spin_lock_irq(&gp->lock); + /* Print things out */ + if (gp->phy_type == phy_mii_mdio0 || + gp->phy_type == phy_mii_mdio1) + netdev_info(gp->dev, "Found %s PHY\n", + gp->phy_mii.def ? gp->phy_mii.def->name : "no"); + gem_begin_auto_negotiation(gp, NULL); - spin_unlock_irq(&gp->lock); } -/* Must be invoked under gp->lock and gp->tx_lock. */ static void gem_init_dma(struct gem *gp) { u64 desc_dma = (u64) gp->gblock_dvma; @@ -1797,7 +1782,6 @@ static void gem_init_dma(struct gem *gp) gp->regs + RXDMA_BLANK); } -/* Must be invoked under gp->lock and gp->tx_lock. */ static u32 gem_setup_multicast(struct gem *gp) { u32 rxcfg = 0; @@ -1835,7 +1819,6 @@ static u32 gem_setup_multicast(struct gem *gp) return rxcfg; } -/* Must be invoked under gp->lock and gp->tx_lock. */ static void gem_init_mac(struct gem *gp) { unsigned char *e = &gp->dev->dev_addr[0]; @@ -1918,7 +1901,6 @@ static void gem_init_mac(struct gem *gp) writel(0, gp->regs + WOL_WAKECSR); } -/* Must be invoked under gp->lock and gp->tx_lock. */ static void gem_init_pause_thresholds(struct gem *gp) { u32 cfg; @@ -2079,7 +2061,6 @@ static int gem_check_invariants(struct gem *gp) return 0; } -/* Must be invoked under gp->lock and gp->tx_lock. */ static void gem_reinit_chip(struct gem *gp) { /* Reset the chip */ @@ -2100,11 +2081,9 @@ static void gem_reinit_chip(struct gem *gp) } -/* Must be invoked with no lock held. */ static void gem_stop_phy(struct gem *gp, int wol) { u32 mifcfg; - unsigned long flags; /* Let the chip settle down a bit, it seems that helps * for sleep mode on some models @@ -2150,15 +2129,9 @@ static void gem_stop_phy(struct gem *gp, int wol) writel(0, gp->regs + RXDMA_CFG); if (!wol) { - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); gem_reset(gp); writel(MAC_TXRST_CMD, gp->regs + MAC_TXRST); writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST); - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); - - /* No need to take the lock here */ if (found_mii_phy(gp) && gp->phy_mii.def->ops->suspend) gp->phy_mii.def->ops->suspend(&gp->phy_mii); @@ -2175,54 +2148,55 @@ static void gem_stop_phy(struct gem *gp, int wol) } } - static int gem_do_start(struct net_device *dev) { struct gem *gp = netdev_priv(dev); - unsigned long flags; - - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); + int rc; /* Enable the cell */ gem_get_cell(gp); - /* Init & setup chip hardware */ - gem_reinit_chip(gp); - - gp->running = 1; - - napi_enable(&gp->napi); + /* Make sure PCI access and bus master are enabled */ + rc = pci_enable_device(gp->pdev); + if (rc) { + netdev_err(dev, "Failed to enable chip on PCI bus !\n"); - if (gp->lstate == link_up) { - netif_carrier_on(gp->dev); - gem_set_link_modes(gp); + /* Put cell and forget it for now, it will be considered as + * still asleep, a new sleep cycle may bring it back + */ + gem_put_cell(gp); + return -ENXIO; } + pci_set_master(gp->pdev); - netif_wake_queue(gp->dev); - - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); + /* Init & setup chip hardware */ + gem_reinit_chip(gp); - if (request_irq(gp->pdev->irq, gem_interrupt, - IRQF_SHARED, dev->name, (void *)dev)) { + /* An interrupt might come in handy */ + rc = request_irq(gp->pdev->irq, gem_interrupt, + IRQF_SHARED, dev->name, (void *)dev); + if (rc) { netdev_err(dev, "failed to request irq !\n"); - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); - - napi_disable(&gp->napi); - - gp->running = 0; gem_reset(gp); gem_clean_rings(gp); gem_put_cell(gp); + return rc; + } - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); + /* Mark us as attached again if we come from resume(), this has + * no effect if we weren't detatched and needs to be done now. + */ + netif_device_attach(dev); - return -EAGAIN; - } + /* Restart NAPI & queues */ + gem_netif_start(gp); + + /* Detect & init PHY, start autoneg etc... this will + * eventually result in starting DMA operations when + * the link is up + */ + gem_init_phy(gp); return 0; } @@ -2230,22 +2204,30 @@ static int gem_do_start(struct net_device *dev) static void gem_do_stop(struct net_device *dev, int wol) { struct gem *gp = netdev_priv(dev); - unsigned long flags; - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); + /* Stop NAPI and stop tx queue */ + gem_netif_stop(gp); - gp->running = 0; - - /* Stop netif queue */ - netif_stop_queue(dev); - - /* Make sure ints are disabled */ + /* Make sure ints are disabled. We don't care about + * synchronizing as NAPI is disabled, thus a stray + * interrupt will do nothing bad (our irq handler + * just schedules NAPI) + */ gem_disable_ints(gp); - /* We can drop the lock now */ - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); + /* Stop the link timer */ + del_timer_sync(&gp->link_timer); + + /* We cannot cancel the reset task while holding the + * rtnl lock, we'd get an A->B / B->A deadlock stituation + * if we did. This is not an issue however as the reset + * task is synchronized vs. us (rtnl_lock) and will do + * nothing if the device is down or suspended. We do + * still clear reset_task_pending to avoid a spurrious + * reset later on in case we do resume before it gets + * scheduled. + */ + gp->reset_task_pending = 0; /* If we are going to sleep with WOL */ gem_stop_dma(gp); @@ -2260,79 +2242,79 @@ static void gem_do_stop(struct net_device *dev, int wol) /* No irq needed anymore */ free_irq(gp->pdev->irq, (void *) dev); + /* Shut the PHY down eventually and setup WOL */ + gem_stop_phy(gp, wol); + + /* Make sure bus master is disabled */ + pci_disable_device(gp->pdev); + /* Cell not needed neither if no WOL */ - if (!wol) { - spin_lock_irqsave(&gp->lock, flags); + if (!wol) gem_put_cell(gp); - spin_unlock_irqrestore(&gp->lock, flags); - } } static void gem_reset_task(struct work_struct *work) { struct gem *gp = container_of(work, struct gem, reset_task); - mutex_lock(&gp->pm_mutex); + /* Lock out the network stack (essentially shield ourselves + * against a racing open, close, control call, or suspend + */ + rtnl_lock(); - if (gp->opened) - napi_disable(&gp->napi); + /* Skip the reset task if suspended or closed, or if it's + * been cancelled by gem_do_stop (see comment there) + */ + if (!netif_device_present(gp->dev) || + !netif_running(gp->dev) || + !gp->reset_task_pending) { + rtnl_unlock(); + return; + } - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); + /* Stop the link timer */ + del_timer_sync(&gp->link_timer); - if (gp->running) { - netif_stop_queue(gp->dev); + /* Stop NAPI and tx */ + gem_netif_stop(gp); - /* Reset the chip & rings */ - gem_reinit_chip(gp); - if (gp->lstate == link_up) - gem_set_link_modes(gp); - netif_wake_queue(gp->dev); - } + /* Reset the chip & rings */ + gem_reinit_chip(gp); + if (gp->lstate == link_up) + gem_set_link_modes(gp); - gp->reset_task_pending = 0; + /* Restart NAPI and Tx */ + gem_netif_start(gp); - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); + /* We are back ! */ + gp->reset_task_pending = 0; - if (gp->opened) - napi_enable(&gp->napi); + /* If the link is not up, restart autoneg, else restart the + * polling timer + */ + if (gp->lstate != link_up) + gem_begin_auto_negotiation(gp, NULL); + else + mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); - mutex_unlock(&gp->pm_mutex); + rtnl_unlock(); } - static int gem_open(struct net_device *dev) { - struct gem *gp = netdev_priv(dev); - int rc = 0; - - mutex_lock(&gp->pm_mutex); - - /* We need the cell enabled */ - if (!gp->asleep) - rc = gem_do_start(dev); - gp->opened = (rc == 0); - - mutex_unlock(&gp->pm_mutex); - - return rc; + /* We allow open while suspended, we just do nothing, + * the chip will be initialized in resume() + */ + if (netif_device_present(dev)) + return gem_do_start(dev); + return 0; } static int gem_close(struct net_device *dev) { - struct gem *gp = netdev_priv(dev); - - mutex_lock(&gp->pm_mutex); - - napi_disable(&gp->napi); - - gp->opened = 0; - if (!gp->asleep) + if (netif_device_present(dev)) gem_do_stop(dev, 0); - mutex_unlock(&gp->pm_mutex); - return 0; } @@ -2341,59 +2323,35 @@ static int gem_suspend(struct pci_dev *pdev, pm_message_t state) { struct net_device *dev = pci_get_drvdata(pdev); struct gem *gp = netdev_priv(dev); - unsigned long flags; - mutex_lock(&gp->pm_mutex); - - netdev_info(dev, "suspending, WakeOnLan %s\n", - (gp->wake_on_lan && gp->opened) ? "enabled" : "disabled"); - - /* Keep the cell enabled during the entire operation */ - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); - gem_get_cell(gp); - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); - - /* If the driver is opened, we stop the MAC */ - if (gp->opened) { - napi_disable(&gp->napi); + /* Lock the network stack first to avoid racing with open/close, + * reset task and setting calls + */ + rtnl_lock(); - /* Stop traffic, mark us closed */ + /* Not running, mark ourselves non-present, no need for + * a lock here + */ + if (!netif_running(dev)) { netif_device_detach(dev); + rtnl_unlock(); + return 0; + } + netdev_info(dev, "suspending, WakeOnLan %s\n", + (gp->wake_on_lan && netif_running(dev)) ? + "enabled" : "disabled"); - /* Switch off MAC, remember WOL setting */ - gp->asleep_wol = gp->wake_on_lan; - gem_do_stop(dev, gp->asleep_wol); - } else - gp->asleep_wol = 0; - - /* Mark us asleep */ - gp->asleep = 1; - wmb(); - - /* Stop the link timer */ - del_timer_sync(&gp->link_timer); - - /* Now we release the mutex to not block the reset task who - * can take it too. We are marked asleep, so there will be no - * conflict here + /* Tell the network stack we're gone. gem_do_stop() below will + * synchronize with TX, stop NAPI etc... */ - mutex_unlock(&gp->pm_mutex); - - /* Wait for the pending reset task to complete */ - flush_work_sync(&gp->reset_task); + netif_device_detach(dev); - /* Shut the PHY down eventually and setup WOL */ - gem_stop_phy(gp, gp->asleep_wol); - - /* Make sure bus master is disabled */ - pci_disable_device(gp->pdev); + /* Switch off chip, remember WOL setting */ + gp->asleep_wol = gp->wake_on_lan; + gem_do_stop(dev, gp->asleep_wol); - /* Release the cell, no need to take a lock at this point since - * nothing else can happen now - */ - gem_put_cell(gp); + /* Unlock the network stack */ + rtnl_unlock(); return 0; } @@ -2402,53 +2360,23 @@ static int gem_resume(struct pci_dev *pdev) { struct net_device *dev = pci_get_drvdata(pdev); struct gem *gp = netdev_priv(dev); - unsigned long flags; - netdev_info(dev, "resuming\n"); + /* See locking comment in gem_suspend */ + rtnl_lock(); - mutex_lock(&gp->pm_mutex); - - /* Keep the cell enabled during the entire operation, no need to - * take a lock here tho since nothing else can happen while we are - * marked asleep + /* Not running, mark ourselves present, no need for + * a lock here */ - gem_get_cell(gp); - - /* Make sure PCI access and bus master are enabled */ - if (pci_enable_device(gp->pdev)) { - netdev_err(dev, "Can't re-enable chip !\n"); - /* Put cell and forget it for now, it will be considered as - * still asleep, a new sleep cycle may bring it back - */ - gem_put_cell(gp); - mutex_unlock(&gp->pm_mutex); + if (!netif_running(dev)) { + netif_device_attach(dev); + rtnl_unlock(); return 0; } - pci_set_master(gp->pdev); - - /* Reset everything */ - gem_reset(gp); - /* Mark us woken up */ - gp->asleep = 0; - wmb(); - - /* Bring the PHY back. Again, lock is useless at this point as - * nothing can be happening until we restart the whole thing + /* Restart chip. If that fails there isn't much we can do, we + * leave things stopped. */ - gem_init_phy(gp); - - /* If we were opened, bring everything back */ - if (gp->opened) { - /* Restart MAC */ - gem_do_start(dev); - - /* Re-attach net device */ - netif_device_attach(dev); - } - - spin_lock_irqsave(&gp->lock, flags); - spin_lock(&gp->tx_lock); + gem_do_start(dev); /* If we had WOL enabled, the cell clock was never turned off during * sleep, so we end up beeing unbalanced. Fix that here @@ -2456,15 +2384,8 @@ static int gem_resume(struct pci_dev *pdev) if (gp->asleep_wol) gem_put_cell(gp); - /* This function doesn't need to hold the cell, it will be held if the - * driver is open by gem_do_start(). - */ - gem_put_cell(gp); - - spin_unlock(&gp->tx_lock); - spin_unlock_irqrestore(&gp->lock, flags); - - mutex_unlock(&gp->pm_mutex); + /* Unlock the network stack */ + rtnl_unlock(); return 0; } @@ -2474,33 +2395,35 @@ static struct net_device_stats *gem_get_stats(struct net_device *dev) { struct gem *gp = netdev_priv(dev); - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - /* I have seen this being called while the PM was in progress, - * so we shield against this + * so we shield against this. Let's also not poke at registers + * while the reset task is going on. + * + * TODO: Move stats collection elsewhere (link timer ?) and + * make this a nop to avoid all those synchro issues */ - if (gp->running) { - dev->stats.rx_crc_errors += readl(gp->regs + MAC_FCSERR); - writel(0, gp->regs + MAC_FCSERR); + if (!netif_device_present(dev) || !netif_running(dev)) + goto bail; - dev->stats.rx_frame_errors += readl(gp->regs + MAC_AERR); - writel(0, gp->regs + MAC_AERR); + /* Better safe than sorry... */ + if (WARN_ON(!gp->cell_enabled)) + goto bail; - dev->stats.rx_length_errors += readl(gp->regs + MAC_LERR); - writel(0, gp->regs + MAC_LERR); + dev->stats.rx_crc_errors += readl(gp->regs + MAC_FCSERR); + writel(0, gp->regs + MAC_FCSERR); - dev->stats.tx_aborted_errors += readl(gp->regs + MAC_ECOLL); - dev->stats.collisions += - (readl(gp->regs + MAC_ECOLL) + - readl(gp->regs + MAC_LCOLL)); - writel(0, gp->regs + MAC_ECOLL); - writel(0, gp->regs + MAC_LCOLL); - } + dev->stats.rx_frame_errors += readl(gp->regs + MAC_AERR); + writel(0, gp->regs + MAC_AERR); - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); + dev->stats.rx_length_errors += readl(gp->regs + MAC_LERR); + writel(0, gp->regs + MAC_LERR); + dev->stats.tx_aborted_errors += readl(gp->regs + MAC_ECOLL); + dev->stats.collisions += + (readl(gp->regs + MAC_ECOLL) + readl(gp->regs + MAC_LCOLL)); + writel(0, gp->regs + MAC_ECOLL); + writel(0, gp->regs + MAC_LCOLL); + bail: return &dev->stats; } @@ -2513,22 +2436,19 @@ static int gem_set_mac_address(struct net_device *dev, void *addr) if (!is_valid_ether_addr(macaddr->sa_data)) return -EADDRNOTAVAIL; - if (!netif_running(dev) || !netif_device_present(dev)) { - /* We'll just catch it later when the - * device is up'd or resumed. - */ - memcpy(dev->dev_addr, macaddr->sa_data, dev->addr_len); + memcpy(dev->dev_addr, macaddr->sa_data, dev->addr_len); + + /* We'll just catch it later when the device is up'd or resumed */ + if (!netif_running(dev) || !netif_device_present(dev)) return 0; - } - mutex_lock(&gp->pm_mutex); - memcpy(dev->dev_addr, macaddr->sa_data, dev->addr_len); - if (gp->running) { - writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0); - writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1); - writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2); - } - mutex_unlock(&gp->pm_mutex); + /* Better safe than sorry... */ + if (WARN_ON(!gp->cell_enabled)) + return 0; + + writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0); + writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1); + writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2); return 0; } @@ -2539,14 +2459,12 @@ static void gem_set_multicast(struct net_device *dev) u32 rxcfg, rxcfg_new; int limit = 10000; + if (!netif_running(dev) || !netif_device_present(dev)) + return; - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - - if (!gp->running) - goto bail; - - netif_stop_queue(dev); + /* Better safe than sorry... */ + if (gp->reset_task_pending || WARN_ON(!gp->cell_enabled)) + return; rxcfg = readl(gp->regs + MAC_RXCFG); rxcfg_new = gem_setup_multicast(gp); @@ -2566,12 +2484,6 @@ static void gem_set_multicast(struct net_device *dev) rxcfg |= rxcfg_new; writel(rxcfg, gp->regs + MAC_RXCFG); - - netif_wake_queue(dev); - - bail: - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); } /* Jumbo-grams don't seem to work :-( */ @@ -2589,26 +2501,21 @@ static int gem_change_mtu(struct net_device *dev, int new_mtu) if (new_mtu < GEM_MIN_MTU || new_mtu > GEM_MAX_MTU) return -EINVAL; - if (!netif_running(dev) || !netif_device_present(dev)) { - /* We'll just catch it later when the - * device is up'd or resumed. - */ - dev->mtu = new_mtu; + dev->mtu = new_mtu; + + /* We'll just catch it later when the device is up'd or resumed */ + if (!netif_running(dev) || !netif_device_present(dev)) return 0; - } - mutex_lock(&gp->pm_mutex); - spin_lock_irq(&gp->lock); - spin_lock(&gp->tx_lock); - dev->mtu = new_mtu; - if (gp->running) { - gem_reinit_chip(gp); - if (gp->lstate == link_up) - gem_set_link_modes(gp); - } - spin_unlock(&gp->tx_lock); - spin_unlock_irq(&gp->lock); - mutex_unlock(&gp->pm_mutex); + /* Better safe than sorry... */ + if (WARN_ON(!gp->cell_enabled)) + return 0; + + gem_netif_stop(gp); + gem_reinit_chip(gp); + if (gp->lstate == link_up) + gem_set_link_modes(gp); + gem_netif_start(gp); return 0; } @@ -2640,7 +2547,6 @@ static int gem_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) cmd->phy_address = 0; /* XXX fixed PHYAD */ /* Return current PHY settings */ - spin_lock_irq(&gp->lock); cmd->autoneg = gp->want_autoneg; ethtool_cmd_speed_set(cmd, gp->phy_mii.speed); cmd->duplex = gp->phy_mii.duplex; @@ -2652,7 +2558,6 @@ static int gem_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) */ if (cmd->advertising == 0) cmd->advertising = cmd->supported; - spin_unlock_irq(&gp->lock); } else { // XXX PCS ? cmd->supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | @@ -2706,11 +2611,10 @@ static int gem_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) return -EINVAL; /* Apply settings and restart link process. */ - spin_lock_irq(&gp->lock); - gem_get_cell(gp); - gem_begin_auto_negotiation(gp, cmd); - gem_put_cell(gp); - spin_unlock_irq(&gp->lock); + if (netif_device_present(gp->dev)) { + del_timer_sync(&gp->link_timer); + gem_begin_auto_negotiation(gp, cmd); + } return 0; } @@ -2722,12 +2626,11 @@ static int gem_nway_reset(struct net_device *dev) if (!gp->want_autoneg) return -EINVAL; - /* Restart link process. */ - spin_lock_irq(&gp->lock); - gem_get_cell(gp); - gem_begin_auto_negotiation(gp, NULL); - gem_put_cell(gp); - spin_unlock_irq(&gp->lock); + /* Restart link process */ + if (netif_device_present(gp->dev)) { + del_timer_sync(&gp->link_timer); + gem_begin_auto_negotiation(gp, NULL); + } return 0; } @@ -2791,16 +2694,11 @@ static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) struct gem *gp = netdev_priv(dev); struct mii_ioctl_data *data = if_mii(ifr); int rc = -EOPNOTSUPP; - unsigned long flags; - /* Hold the PM mutex while doing ioctl's or we may collide - * with power management. + /* For SIOCGMIIREG and SIOCSMIIREG the core checks for us that + * netif_device_present() is true and holds rtnl_lock for us + * so we have nothing to worry about */ - mutex_lock(&gp->pm_mutex); - - spin_lock_irqsave(&gp->lock, flags); - gem_get_cell(gp); - spin_unlock_irqrestore(&gp->lock, flags); switch (cmd) { case SIOCGMIIPHY: /* Get address of MII PHY in use. */ @@ -2808,32 +2706,17 @@ static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /* Fallthrough... */ case SIOCGMIIREG: /* Read MII PHY register. */ - if (!gp->running) - rc = -EAGAIN; - else { - data->val_out = __phy_read(gp, data->phy_id & 0x1f, - data->reg_num & 0x1f); - rc = 0; - } + data->val_out = __phy_read(gp, data->phy_id & 0x1f, + data->reg_num & 0x1f); + rc = 0; break; case SIOCSMIIREG: /* Write MII PHY register. */ - if (!gp->running) - rc = -EAGAIN; - else { - __phy_write(gp, data->phy_id & 0x1f, data->reg_num & 0x1f, - data->val_in); - rc = 0; - } + __phy_write(gp, data->phy_id & 0x1f, data->reg_num & 0x1f, + data->val_in); + rc = 0; break; }; - - spin_lock_irqsave(&gp->lock, flags); - gem_put_cell(gp); - spin_unlock_irqrestore(&gp->lock, flags); - - mutex_unlock(&gp->pm_mutex); - return rc; } @@ -2921,23 +2804,9 @@ static void gem_remove_one(struct pci_dev *pdev) unregister_netdev(dev); - /* Stop the link timer */ - del_timer_sync(&gp->link_timer); - - /* We shouldn't need any locking here */ - gem_get_cell(gp); - - /* Cancel reset task */ + /* Ensure reset task is truely gone */ cancel_work_sync(&gp->reset_task); - /* Shut the PHY down */ - gem_stop_phy(gp, 0); - - gem_put_cell(gp); - - /* Make sure bus master is disabled */ - pci_disable_device(gp->pdev); - /* Free resources */ pci_free_consistent(pdev, sizeof(struct gem_init_block), @@ -3043,10 +2912,6 @@ static int __devinit gem_init_one(struct pci_dev *pdev, gp->msg_enable = DEFAULT_MSG; - spin_lock_init(&gp->lock); - spin_lock_init(&gp->tx_lock); - mutex_init(&gp->pm_mutex); - init_timer(&gp->link_timer); gp->link_timer.function = gem_link_timer; gp->link_timer.data = (unsigned long) gp; @@ -3122,14 +2987,11 @@ static int __devinit gem_init_one(struct pci_dev *pdev, /* Set that now, in case PM kicks in now */ pci_set_drvdata(pdev, dev); - /* Detect & init PHY, start autoneg, we release the cell now - * too, it will be managed by whoever needs it - */ - gem_init_phy(gp); - - spin_lock_irq(&gp->lock); - gem_put_cell(gp); - spin_unlock_irq(&gp->lock); + /* We can do scatter/gather and HW checksum */ + dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM; + dev->features |= dev->hw_features | NETIF_F_RXCSUM; + if (pci_using_dac) + dev->features |= NETIF_F_HIGHDMA; /* Register with kernel */ if (register_netdev(dev)) { @@ -3138,20 +3000,15 @@ static int __devinit gem_init_one(struct pci_dev *pdev, goto err_out_free_consistent; } + /* Undo the get_cell with appropriate locking (we could use + * ndo_init/uninit but that would be even more clumsy imho) + */ + rtnl_lock(); + gem_put_cell(gp); + rtnl_unlock(); + netdev_info(dev, "Sun GEM (PCI) 10/100/1000BaseT Ethernet %pM\n", dev->dev_addr); - - if (gp->phy_type == phy_mii_mdio0 || - gp->phy_type == phy_mii_mdio1) - netdev_info(dev, "Found %s PHY\n", - gp->phy_mii.def ? gp->phy_mii.def->name : "no"); - - /* GEM can do it all... */ - dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM; - dev->features |= dev->hw_features | NETIF_F_RXCSUM | NETIF_F_LLTX; - if (pci_using_dac) - dev->features |= NETIF_F_HIGHDMA; - return 0; err_out_free_consistent: diff --git a/drivers/net/sungem.h b/drivers/net/sungem.h index d225077964e..835ce1b3cb9 100644 --- a/drivers/net/sungem.h +++ b/drivers/net/sungem.h @@ -973,23 +973,14 @@ enum link_state { }; struct gem { - spinlock_t lock; - spinlock_t tx_lock; void __iomem *regs; int rx_new, rx_old; int tx_new, tx_old; unsigned int has_wol : 1; /* chip supports wake-on-lan */ - unsigned int asleep : 1; /* chip asleep, protected by pm_mutex */ unsigned int asleep_wol : 1; /* was asleep with WOL enabled */ - unsigned int opened : 1; /* driver opened, protected by pm_mutex */ - unsigned int running : 1; /* chip running, protected by lock */ - /* cell enable count, protected by lock */ int cell_enabled; - - struct mutex pm_mutex; - u32 msg_enable; u32 status; @@ -1033,20 +1024,4 @@ struct gem { #define found_mii_phy(gp) ((gp->phy_type == phy_mii_mdio0 || gp->phy_type == phy_mii_mdio1) && \ gp->phy_mii.def && gp->phy_mii.def->ops) -#define ALIGNED_RX_SKB_ADDR(addr) \ - ((((unsigned long)(addr) + (64UL - 1UL)) & ~(64UL - 1UL)) - (unsigned long)(addr)) -static __inline__ struct sk_buff *gem_alloc_skb(int size, - gfp_t gfp_flags) -{ - struct sk_buff *skb = alloc_skb(size + 64, gfp_flags); - - if (skb) { - int offset = (int) ALIGNED_RX_SKB_ADDR(skb->data); - if (offset) - skb_reserve(skb, offset); - } - - return skb; -} - #endif /* _SUNGEM_H */ |