*
* Copyright (C) 2000, 2001, 2002, 2003 David S. Miller (davem@redhat.com)
*
- * Support for Apple GMAC and assorted PHYs by
- * Benjamin Herrenscmidt (benh@kernel.crashing.org)
+ * Support for Apple GMAC and assorted PHYs, WOL, Power Management
+ * (C) 2001,2002,2003 Benjamin Herrenscmidt (benh@kernel.crashing.org)
+ * (C) 2004,2005 Benjamin Herrenscmidt, IBM Corp.
*
* NAPI and NETPOLL support
* (C) 2004 by Eric Lemoine (eric.lemoine@gmail.com)
*
* TODO:
- * - Get rid of all those nasty mdelay's and replace them
- * with schedule_timeout.
- * - Implement WOL
+ * - 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 netif_poll_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...
*/
#include <linux/module.h>
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{ PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_K2_GMAC,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
+ { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_SH_SUNGEM,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL },
{0, }
};
writel(GREG_STAT_NAPI | GREG_STAT_TXDONE, gp->regs + GREG_IMASK);
}
+static void gem_get_cell(struct gem *gp)
+{
+ BUG_ON(gp->cell_enabled < 0);
+ gp->cell_enabled++;
+#ifdef CONFIG_PPC_PMAC
+ if (gp->cell_enabled == 1) {
+ mb();
+ pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 1);
+ udelay(10);
+ }
+#endif /* CONFIG_PPC_PMAC */
+}
+
+/* Turn off the chip's clock */
+static void gem_put_cell(struct gem *gp)
+{
+ BUG_ON(gp->cell_enabled <= 0);
+ gp->cell_enabled--;
+#ifdef CONFIG_PPC_PMAC
+ if (gp->cell_enabled == 0) {
+ mb();
+ pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 0);
+ udelay(10);
+ }
+#endif /* CONFIG_PPC_PMAC */
+}
+
static void gem_handle_mif_event(struct gem *gp, u32 reg_val, u32 changed_bits)
{
if (netif_msg_intr(gp))
u64 desc_dma;
u32 val;
- /* First, reset MAC RX. */
+ /* First, reset & disable MAC RX. */
+ writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST);
+ for (limit = 0; limit < 5000; limit++) {
+ if (!(readl(gp->regs + MAC_RXRST) & MAC_RXRST_CMD))
+ break;
+ udelay(10);
+ }
+ if (limit == 5000) {
+ printk(KERN_ERR "%s: RX MAC will not reset, resetting whole "
+ "chip.\n", dev->name);
+ return 1;
+ }
+
writel(gp->mac_rx_cfg & ~MAC_RXCFG_ENAB,
gp->regs + MAC_RXCFG);
for (limit = 0; limit < 5000; limit++) {
return 0;
do_reset:
- gp->reset_task_pending = 2;
+ gp->reset_task_pending = 1;
schedule_work(&gp->reset_task);
return 1;
struct gem *gp = dev->priv;
unsigned long flags;
+ /*
+ * NAPI locking nightmare: See comment at head of driver
+ */
spin_lock_irqsave(&gp->lock, flags);
do {
struct gem *gp = dev->priv;
unsigned long flags;
- /* Swallow interrupts when shutting the chip down */
- if (!gp->hw_running)
+ /* 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);
struct gem *gp = dev->priv;
printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
- if (!gp->hw_running) {
+ if (!gp->running) {
printk("%s: hrm.. hw not running !\n", dev->name);
return;
}
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
- gp->reset_task_pending = 2;
+ gp->reset_task_pending = 1;
schedule_work(&gp->reset_task);
spin_unlock(&gp->tx_lock);
local_irq_restore(flags);
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)) {
return NETDEV_TX_OK;
}
-/* Jumbo-grams don't seem to work :-( */
-#define GEM_MIN_MTU 68
-#if 1
-#define GEM_MAX_MTU 1500
-#else
-#define GEM_MAX_MTU 9000
-#endif
-
-static int gem_change_mtu(struct net_device *dev, int new_mtu)
-{
- struct gem *gp = dev->priv;
-
- 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;
- return 0;
- }
-
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
- dev->mtu = new_mtu;
- gp->reset_task_pending = 1;
- schedule_work(&gp->reset_task);
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
-
- flush_scheduled_work();
-
- return 0;
-}
-
#define STOP_TRIES 32
/* Must be invoked under gp->lock and gp->tx_lock. */
-static void gem_stop(struct gem *gp)
+static void gem_reset(struct gem *gp)
{
int limit;
u32 val;
/* Must be invoked under gp->lock and gp->tx_lock. */
static void gem_start_dma(struct gem *gp)
{
- unsigned long val;
+ u32 val;
/* We are ready to rock, turn everything on. */
val = readl(gp->regs + TXDMA_CFG);
(void) readl(gp->regs + MAC_RXCFG);
udelay(100);
- writel(GREG_STAT_TXDONE, gp->regs + GREG_IMASK);
+ gem_enable_ints(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 ...
+ */
+static void gem_stop_dma(struct gem *gp)
+{
+ u32 val;
+
+ /* We are done rocking, turn everything off. */
+ val = readl(gp->regs + TXDMA_CFG);
+ writel(val & ~TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG);
+ val = readl(gp->regs + RXDMA_CFG);
+ writel(val & ~RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG);
+ val = readl(gp->regs + MAC_TXCFG);
+ writel(val & ~MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG);
+ val = readl(gp->regs + MAC_RXCFG);
+ writel(val & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG);
+
+ (void) readl(gp->regs + MAC_RXCFG);
+ /* Need to wait a bit ... done by the caller */
}
if (speed == 0)
speed = SPEED_10;
- /* If HW is down, we don't try to actually setup the PHY, we
+ /* If we are asleep, we don't try to actually setup the PHY, we
* just store the settings
*/
- if (!gp->hw_running) {
+ if (gp->asleep) {
gp->phy_mii.autoneg = gp->want_autoneg = autoneg;
gp->phy_mii.speed = speed;
gp->phy_mii.duplex = duplex;
printk(KERN_INFO "%s: Link is up at %d Mbps, %s-duplex.\n",
gp->dev->name, speed, (full_duplex ? "full" : "half"));
+ if (!gp->running)
+ return 0;
+
val = (MAC_TXCFG_EIPG0 | MAC_TXCFG_NGU);
if (full_duplex) {
val |= (MAC_TXCFG_ICS | MAC_TXCFG_ICOLL);
}
}
-static void gem_init_rings(struct gem *);
-static void gem_init_hw(struct gem *, int);
-
-static void gem_reset_task(void *data)
-{
- struct gem *gp = (struct gem *) data;
-
- netif_poll_disable(gp->dev);
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
-
- if (gp->hw_running && gp->opened) {
- netif_stop_queue(gp->dev);
-
- /* Reset the chip & rings */
- gem_stop(gp);
- gem_init_rings(gp);
-
- gem_init_hw(gp,
- (gp->reset_task_pending == 2));
-
- netif_wake_queue(gp->dev);
- }
- gp->reset_task_pending = 0;
-
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
- netif_poll_enable(gp->dev);
-}
-
static void gem_link_timer(unsigned long data)
{
struct gem *gp = (struct gem *) data;
int restart_aneg = 0;
- if (!gp->hw_running)
+ if (gp->asleep)
return;
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
+ gem_get_cell(gp);
- /* If the link of task is still pending, we just
+ /* If the reset task is still pending, we just
* reschedule the link timer
*/
if (gp->reset_task_pending)
if ((val & PCS_MIISTAT_LS) != 0) {
gp->lstate = link_up;
netif_carrier_on(gp->dev);
- if (gp->opened)
- (void)gem_set_link_modes(gp);
+ (void)gem_set_link_modes(gp);
}
goto restart;
}
} else if (gp->lstate != link_up) {
gp->lstate = link_up;
netif_carrier_on(gp->dev);
- if (gp->opened && gem_set_link_modes(gp))
+ if (gem_set_link_modes(gp))
restart_aneg = 1;
}
} else {
printk(KERN_INFO "%s: Link down\n",
gp->dev->name);
netif_carrier_off(gp->dev);
- gp->reset_task_pending = 2;
+ gp->reset_task_pending = 1;
schedule_work(&gp->reset_task);
restart_aneg = 1;
} else if (++gp->timer_ticks > 10) {
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);
}
wmb();
}
-/* Must be invoked under gp->lock and gp->tx_lock. */
+/* Init PHY interface and start link poll state machine */
static void gem_init_phy(struct gem *gp)
{
u32 mifcfg;
-
+
/* Revert MIF CFG setting done on stop_phy */
mifcfg = readl(gp->regs + MIF_CFG);
mifcfg &= ~MIF_CFG_BBMODE;
writel(mifcfg, gp->regs + MIF_CFG);
-#ifdef CONFIG_PPC_PMAC
if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) {
- int i, j;
+ int i;
/* Those delay sucks, the HW seem to love them though, I'll
* serisouly consider breaking some locks here to be able
* to schedule instead
*/
- pmac_call_feature(PMAC_FTR_GMAC_PHY_RESET, gp->of_node, 0, 0);
- for (j = 0; j < 3; j++) {
+ for (i = 0; i < 3; i++) {
+#ifdef CONFIG_PPC_PMAC
+ pmac_call_feature(PMAC_FTR_GMAC_PHY_RESET, gp->of_node, 0, 0);
+ msleep(20);
+#endif
/* Some PHYs used by apple have problem getting back to us,
- * we _know_ it's actually at addr 0 or 1, that's a hack, but
- * it helps to do that reset now. I suspect some motherboards
- * don't wire the PHY reset line properly, thus the PHY doesn't
- * come back with the above pmac_call_feature.
+ * we do an additional reset here
*/
- gp->mii_phy_addr = 0;
- phy_write(gp, MII_BMCR, BMCR_RESET);
- gp->mii_phy_addr = 1;
phy_write(gp, MII_BMCR, BMCR_RESET);
- /* We should probably break some locks here and schedule... */
- mdelay(10);
-
- /* On K2, we only probe the internal PHY at address 1, other
- * addresses tend to return garbage.
- */
- if (gp->pdev->device == PCI_DEVICE_ID_APPLE_K2_GMAC)
+ msleep(20);
+ if (phy_read(gp, MII_BMCR) != 0xffff)
break;
-
- for (i = 0; i < 32; i++) {
- gp->mii_phy_addr = i;
- if (phy_read(gp, MII_BMCR) != 0xffff)
- break;
- }
- if (i == 32) {
+ if (i == 2)
printk(KERN_WARNING "%s: GMAC PHY not responding !\n",
gp->dev->name);
- gp->mii_phy_addr = 0;
- } else
- break;
}
}
-#endif /* CONFIG_PPC_PMAC */
if (gp->pdev->vendor == PCI_VENDOR_ID_SUN &&
gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) {
val |= PCS_SCTRL_LOOP;
writel(val, gp->regs + PCS_SCTRL);
}
+
+ /* Default aneg parameters */
+ gp->timer_ticks = 0;
+ 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);
+ gem_begin_auto_negotiation(gp, NULL);
+ spin_unlock_irq(&gp->lock);
}
/* Must be invoked under gp->lock and gp->tx_lock. */
}
/* Must be invoked under gp->lock and gp->tx_lock. */
-static u32
-gem_setup_multicast(struct gem *gp)
+static u32 gem_setup_multicast(struct gem *gp)
{
u32 rxcfg = 0;
int i;
* make no use of those events other than to record them.
*/
writel(0xffffffff, gp->regs + MAC_MCMASK);
+
+ /* Don't enable GEM's WOL in normal operations
+ */
+ if (gp->has_wol)
+ writel(0, gp->regs + WOL_WAKECSR);
}
/* Must be invoked under gp->lock and gp->tx_lock. */
gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64;
gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64;
gp->swrst_base = 0;
+
+ mif_cfg = readl(gp->regs + MIF_CFG);
+ mif_cfg &= ~(MIF_CFG_PSELECT|MIF_CFG_POLL|MIF_CFG_BBMODE|MIF_CFG_MDI1);
+ mif_cfg |= MIF_CFG_MDI0;
+ writel(mif_cfg, gp->regs + MIF_CFG);
+ writel(PCS_DMODE_MGM, gp->regs + PCS_DMODE);
+ writel(MAC_XIFCFG_OE, gp->regs + MAC_XIFCFG);
+
+ /* We hard-code the PHY address so we can properly bring it out of
+ * reset later on, we can't really probe it at this point, though
+ * that isn't an issue.
+ */
+ if (gp->pdev->device == PCI_DEVICE_ID_APPLE_K2_GMAC)
+ gp->mii_phy_addr = 1;
+ else
+ gp->mii_phy_addr = 0;
+
return 0;
}
}
/* Must be invoked under gp->lock and gp->tx_lock. */
-static void gem_init_hw(struct gem *gp, int restart_link)
+static void gem_reinit_chip(struct gem *gp)
{
- /* On Apple's gmac, I initialize the PHY only after
- * setting up the chip. It appears the gigabit PHYs
- * don't quite like beeing talked to on the GII when
- * the chip is not running, I suspect it might not
- * be clocked at that point. --BenH
- */
- if (restart_link)
- gem_init_phy(gp);
- gem_init_pause_thresholds(gp);
- gem_init_dma(gp);
- gem_init_mac(gp);
-
- if (restart_link) {
- /* Default aneg parameters */
- gp->timer_ticks = 0;
- gp->lstate = link_down;
- netif_carrier_off(gp->dev);
-
- /* Can I advertise gigabit here ? I'd need BCM PHY docs... */
- gem_begin_auto_negotiation(gp, NULL);
- } else {
- if (gp->lstate == link_up) {
- netif_carrier_on(gp->dev);
- gem_set_link_modes(gp);
- }
- }
-}
+ /* Reset the chip */
+ gem_reset(gp);
-#ifdef CONFIG_PPC_PMAC
-/* Enable the chip's clock and make sure it's config space is
- * setup properly. There appear to be no need to restore the
- * base addresses.
- */
-static void gem_apple_powerup(struct gem *gp)
-{
- u32 mif_cfg;
+ /* Make sure ints are disabled */
+ gem_disable_ints(gp);
- mb();
- pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 1);
+ /* Allocate & setup ring buffers */
+ gem_init_rings(gp);
- udelay(3);
-
- mif_cfg = readl(gp->regs + MIF_CFG);
- mif_cfg &= ~(MIF_CFG_PSELECT|MIF_CFG_POLL|MIF_CFG_BBMODE|MIF_CFG_MDI1);
- mif_cfg |= MIF_CFG_MDI0;
- writel(mif_cfg, gp->regs + MIF_CFG);
- writel(PCS_DMODE_MGM, gp->regs + PCS_DMODE);
- writel(MAC_XIFCFG_OE, gp->regs + MAC_XIFCFG);
-}
+ /* Configure pause thresholds */
+ gem_init_pause_thresholds(gp);
-/* Turn off the chip's clock */
-static void gem_apple_powerdown(struct gem *gp)
-{
- pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 0);
+ /* Init DMA & MAC engines */
+ gem_init_dma(gp);
+ gem_init_mac(gp);
}
-#endif /* CONFIG_PPC_PMAC */
/* Must be invoked with no lock held. */
-static void gem_stop_phy(struct gem *gp)
+static void gem_stop_phy(struct gem *gp, int wol)
{
u32 mifcfg;
unsigned long flags;
mifcfg &= ~MIF_CFG_POLL;
writel(mifcfg, gp->regs + MIF_CFG);
- if (gp->wake_on_lan) {
- /* Setup wake-on-lan */
+ if (wol && gp->has_wol) {
+ unsigned char *e = &gp->dev->dev_addr[0];
+ u32 csr;
+
+ /* Setup wake-on-lan for MAGIC packet */
+ writel(MAC_RXCFG_HFE | MAC_RXCFG_SFCS | MAC_RXCFG_ENAB,
+ gp->regs + MAC_RXCFG);
+ writel((e[4] << 8) | e[5], gp->regs + WOL_MATCH0);
+ writel((e[2] << 8) | e[3], gp->regs + WOL_MATCH1);
+ writel((e[0] << 8) | e[1], gp->regs + WOL_MATCH2);
+
+ writel(WOL_MCOUNT_N | WOL_MCOUNT_M, gp->regs + WOL_MCOUNT);
+ csr = WOL_WAKECSR_ENABLE;
+ if ((readl(gp->regs + MAC_XIFCFG) & MAC_XIFCFG_GMII) == 0)
+ csr |= WOL_WAKECSR_MII;
+ writel(csr, gp->regs + WOL_WAKECSR);
} else {
writel(0, gp->regs + MAC_RXCFG);
(void)readl(gp->regs + MAC_RXCFG);
writel(0, gp->regs + TXDMA_CFG);
writel(0, gp->regs + RXDMA_CFG);
- if (!gp->wake_on_lan) {
+ if (!wol) {
spin_lock_irqsave(&gp->lock, flags);
spin_lock(&gp->tx_lock);
- gem_stop(gp);
+ 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);
- }
- if (found_mii_phy(gp) && gp->phy_mii.def->ops->suspend)
- gp->phy_mii.def->ops->suspend(&gp->phy_mii, 0 /* wake on lan options */);
+ /* 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);
- if (!gp->wake_on_lan) {
/* According to Apple, we must set the MDIO pins to this begnign
* state or we may 1) eat more current, 2) damage some PHYs
*/
}
}
-/* Shut down the chip, must be called with pm_sem held. */
-static void gem_shutdown(struct gem *gp)
+
+static int gem_do_start(struct net_device *dev)
{
- /* Make us not-running to avoid timers respawning
- * and swallow irqs
- */
- gp->hw_running = 0;
- wmb();
+ struct gem *gp = dev->priv;
+ unsigned long flags;
- /* Stop the link timer */
- del_timer_sync(&gp->link_timer);
+ spin_lock_irqsave(&gp->lock, flags);
+ spin_lock(&gp->tx_lock);
- /* Stop the reset task */
- while (gp->reset_task_pending)
- yield();
-
- /* Actually stop the chip */
- if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) {
- gem_stop_phy(gp);
+ /* Enable the cell */
+ gem_get_cell(gp);
-#ifdef CONFIG_PPC_PMAC
- /* Power down the chip */
- gem_apple_powerdown(gp);
-#endif /* CONFIG_PPC_PMAC */
- } else{
- unsigned long flags;
+ /* Init & setup chip hardware */
+ gem_reinit_chip(gp);
+
+ gp->running = 1;
+
+ if (gp->lstate == link_up) {
+ netif_carrier_on(gp->dev);
+ gem_set_link_modes(gp);
+ }
+
+ netif_wake_queue(gp->dev);
+
+ spin_unlock(&gp->tx_lock);
+ spin_unlock_irqrestore(&gp->lock, flags);
+
+ if (request_irq(gp->pdev->irq, gem_interrupt,
+ SA_SHIRQ, dev->name, (void *)dev)) {
+ printk(KERN_ERR "%s: failed to request irq !\n", gp->dev->name);
spin_lock_irqsave(&gp->lock, flags);
spin_lock(&gp->tx_lock);
- gem_stop(gp);
+
+ gp->running = 0;
+ gem_reset(gp);
+ gem_clean_rings(gp);
+ gem_put_cell(gp);
+
spin_unlock(&gp->tx_lock);
spin_unlock_irqrestore(&gp->lock, flags);
+
+ return -EAGAIN;
}
+
+ return 0;
}
-static void gem_pm_task(void *data)
+static void gem_do_stop(struct net_device *dev, int wol)
{
- struct gem *gp = (struct gem *) data;
+ struct gem *gp = dev->priv;
+ unsigned long flags;
- /* We assume if we can't lock the pm_sem, then open() was
- * called again (or suspend()), and we can safely ignore
- * the PM request
- */
- if (down_trylock(&gp->pm_sem))
- return;
+ spin_lock_irqsave(&gp->lock, flags);
+ spin_lock(&gp->tx_lock);
- /* Driver was re-opened or already shut down */
- if (gp->opened || !gp->hw_running) {
- up(&gp->pm_sem);
- return;
- }
+ gp->running = 0;
+
+ /* Stop netif queue */
+ netif_stop_queue(dev);
- gem_shutdown(gp);
+ /* Make sure ints are disabled */
+ gem_disable_ints(gp);
- up(&gp->pm_sem);
-}
+ /* We can drop the lock now */
+ spin_unlock(&gp->tx_lock);
+ spin_unlock_irqrestore(&gp->lock, flags);
-static void gem_pm_timer(unsigned long data)
-{
- struct gem *gp = (struct gem *) data;
+ /* If we are going to sleep with WOL */
+ gem_stop_dma(gp);
+ msleep(10);
+ if (!wol)
+ gem_reset(gp);
+ msleep(10);
+
+ /* Get rid of rings */
+ gem_clean_rings(gp);
- schedule_work(&gp->pm_task);
+ /* No irq needed anymore */
+ free_irq(gp->pdev->irq, (void *) dev);
+
+ /* Cell not needed neither if no WOL */
+ if (!wol) {
+ spin_lock_irqsave(&gp->lock, flags);
+ gem_put_cell(gp);
+ spin_unlock_irqrestore(&gp->lock, flags);
+ }
}
-static int gem_open(struct net_device *dev)
+static void gem_reset_task(void *data)
{
- struct gem *gp = dev->priv;
- int hw_was_up;
+ struct gem *gp = (struct gem *) data;
down(&gp->pm_sem);
- hw_was_up = gp->hw_running;
+ netif_poll_disable(gp->dev);
- /* Stop the PM timer/task */
- del_timer(&gp->pm_timer);
- flush_scheduled_work();
+ spin_lock_irq(&gp->lock);
+ spin_lock(&gp->tx_lock);
- /* The power-management semaphore protects the hw_running
- * etc. state so it is safe to do this bit without gp->lock
- */
- if (!gp->hw_running) {
-#ifdef CONFIG_PPC_PMAC
- /* First, we need to bring up the chip */
- if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) {
- gem_apple_powerup(gp);
- gem_check_invariants(gp);
- }
-#endif /* CONFIG_PPC_PMAC */
+ if (gp->running == 0)
+ goto not_running;
- /* Reset the chip */
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
- gem_stop(gp);
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
+ if (gp->running) {
+ netif_stop_queue(gp->dev);
- gp->hw_running = 1;
+ /* Reset the chip & rings */
+ gem_reinit_chip(gp);
+ if (gp->lstate == link_up)
+ gem_set_link_modes(gp);
+ netif_wake_queue(gp->dev);
}
+ not_running:
+ gp->reset_task_pending = 0;
- /* We can now request the interrupt as we know it's masked
- * on the controller
- */
- if (request_irq(gp->pdev->irq, gem_interrupt,
- SA_SHIRQ, dev->name, (void *)dev)) {
- printk(KERN_ERR "%s: failed to request irq !\n", gp->dev->name);
-
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
-#ifdef CONFIG_PPC_PMAC
- if (!hw_was_up && gp->pdev->vendor == PCI_VENDOR_ID_APPLE)
- gem_apple_powerdown(gp);
-#endif /* CONFIG_PPC_PMAC */
- /* Fire the PM timer that will shut us down in about 10 seconds */
- gp->pm_timer.expires = jiffies + 10*HZ;
- add_timer(&gp->pm_timer);
- up(&gp->pm_sem);
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
+ spin_unlock(&gp->tx_lock);
+ spin_unlock_irq(&gp->lock);
- return -EAGAIN;
- }
+ netif_poll_enable(gp->dev);
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
+ up(&gp->pm_sem);
+}
- /* Allocate & setup ring buffers */
- gem_init_rings(gp);
- /* Init & setup chip hardware */
- gem_init_hw(gp, !hw_was_up);
+static int gem_open(struct net_device *dev)
+{
+ struct gem *gp = dev->priv;
+ int rc = 0;
- gp->opened = 1;
+ down(&gp->pm_sem);
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
+ /* We need the cell enabled */
+ if (!gp->asleep)
+ rc = gem_do_start(dev);
+ gp->opened = (rc == 0);
up(&gp->pm_sem);
- return 0;
+ return rc;
}
static int gem_close(struct net_device *dev)
{
struct gem *gp = dev->priv;
- /* Make sure we don't get distracted by suspend/resume */
- down(&gp->pm_sem);
-
/* Note: we don't need to call netif_poll_disable() here because
* our caller (dev_close) already did it for us
*/
- /* Stop traffic, mark us closed */
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
+ down(&gp->pm_sem);
gp->opened = 0;
-
- netif_stop_queue(dev);
-
- /* Stop chip */
- gem_stop(gp);
-
- /* Get rid of rings */
- gem_clean_rings(gp);
-
- /* Bye, the pm timer will finish the job */
- free_irq(gp->pdev->irq, (void *) dev);
-
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
-
- /* Fire the PM timer that will shut us down in about 10 seconds */
- gp->pm_timer.expires = jiffies + 10*HZ;
- add_timer(&gp->pm_timer);
+ if (!gp->asleep)
+ gem_do_stop(dev, 0);
up(&gp->pm_sem);
}
#ifdef CONFIG_PM
-static int gem_suspend(struct pci_dev *pdev, u32 state)
+static int gem_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct gem *gp = dev->priv;
+ unsigned long flags;
- netif_poll_disable(dev);
-
- /* We hold the PM semaphore during entire driver
- * sleep time
- */
down(&gp->pm_sem);
+ netif_poll_disable(dev);
+
printk(KERN_INFO "%s: suspending, WakeOnLan %s\n",
- dev->name, gp->wake_on_lan ? "enabled" : "disabled");
+ dev->name,
+ (gp->wake_on_lan && gp->opened) ? "enabled" : "disabled");
- /* If the driver is opened, we stop the DMA */
- if (gp->opened) {
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
+ /* 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) {
/* Stop traffic, mark us closed */
netif_device_detach(dev);
- /* Stop chip */
- gem_stop(gp);
+ /* 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;
- /* Get rid of ring buffers */
- gem_clean_rings(gp);
+ /* Mark us asleep */
+ gp->asleep = 1;
+ wmb();
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
+ /* Stop the link timer */
+ del_timer_sync(&gp->link_timer);
- if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE)
- disable_irq(gp->pdev->irq);
- }
+ /* Now we release the semaphore to not block the reset task who
+ * can take it too. We are marked asleep, so there will be no
+ * conflict here
+ */
+ up(&gp->pm_sem);
- if (gp->hw_running) {
- /* Kill PM timer if any */
- del_timer_sync(&gp->pm_timer);
- flush_scheduled_work();
+ /* Wait for a pending reset task to complete */
+ while (gp->reset_task_pending)
+ yield();
+ flush_scheduled_work();
- gem_shutdown(gp);
- }
+ /* 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);
+
+ /* Release the cell, no need to take a lock at this point since
+ * nothing else can happen now
+ */
+ gem_put_cell(gp);
return 0;
}
{
struct net_device *dev = pci_get_drvdata(pdev);
struct gem *gp = dev->priv;
+ unsigned long flags;
printk(KERN_INFO "%s: resuming\n", dev->name);
- if (gp->opened) {
-#ifdef CONFIG_PPC_PMAC
- /* First, we need to bring up the chip */
- if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) {
- gem_apple_powerup(gp);
- gem_check_invariants(gp);
- }
-#endif /* CONFIG_PPC_PMAC */
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
+ down(&gp->pm_sem);
- gem_stop(gp);
- gp->hw_running = 1;
- gem_init_rings(gp);
- gem_init_hw(gp, 1);
+ /* 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
+ */
+ gem_get_cell(gp);
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
+ /* Make sure PCI access and bus master are enabled */
+ if (pci_enable_device(gp->pdev)) {
+ printk(KERN_ERR "%s: Can't re-enable chip !\n",
+ dev->name);
+ /* 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);
+ up(&gp->pm_sem);
+ 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
+ */
+ 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);
- if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE)
- enable_irq(gp->pdev->irq);
+
}
- up(&gp->pm_sem);
+
+ spin_lock_irqsave(&gp->lock, flags);
+ spin_lock(&gp->tx_lock);
+
+ /* If we had WOL enabled, the cell clock was never turned off during
+ * sleep, so we end up beeing unbalanced. Fix that here
+ */
+ 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);
netif_poll_enable(dev);
+ up(&gp->pm_sem);
+
return 0;
}
#endif /* CONFIG_PM */
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
- if (gp->hw_running) {
+ /* I have seen this being called while the PM was in progress,
+ * so we shield against this
+ */
+ if (gp->running) {
stats->rx_crc_errors += readl(gp->regs + MAC_FCSERR);
writel(0, gp->regs + MAC_FCSERR);
u32 rxcfg, rxcfg_new;
int limit = 10000;
- if (!gp->hw_running)
- return;
-
+
spin_lock_irq(&gp->lock);
spin_lock(&gp->tx_lock);
+ if (!gp->running)
+ goto bail;
+
netif_stop_queue(dev);
rxcfg = readl(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 :-( */
+#define GEM_MIN_MTU 68
+#if 1
+#define GEM_MAX_MTU 1500
+#else
+#define GEM_MAX_MTU 9000
+#endif
+
+static int gem_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct gem *gp = dev->priv;
+
+ 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;
+ return 0;
+ }
+
+ down(&gp->pm_sem);
+ 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);
+ up(&gp->pm_sem);
+
+ return 0;
+}
+
static void gem_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct gem *gp = dev->priv;
/* Return current PHY settings */
spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
cmd->autoneg = gp->want_autoneg;
cmd->speed = gp->phy_mii.speed;
cmd->duplex = gp->phy_mii.duplex;
*/
if (cmd->advertising == 0)
cmd->advertising = cmd->supported;
- spin_unlock(&gp->tx_lock);
spin_unlock_irq(&gp->lock);
} else { // XXX PCS ?
cmd->supported =
/* Apply settings and restart link process. */
spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
+ gem_get_cell(gp);
gem_begin_auto_negotiation(gp, cmd);
- spin_unlock(&gp->tx_lock);
+ gem_put_cell(gp);
spin_unlock_irq(&gp->lock);
return 0;
/* Restart link process. */
spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
+ gem_get_cell(gp);
gem_begin_auto_negotiation(gp, NULL);
- spin_unlock(&gp->tx_lock);
+ gem_put_cell(gp);
spin_unlock_irq(&gp->lock);
return 0;
struct gem *gp = dev->priv;
gp->msg_enable = value;
}
-
+
+
+/* Add more when I understand how to program the chip */
+/* like WAKE_UCAST | WAKE_MCAST | WAKE_BCAST */
+
+#define WOL_SUPPORTED_MASK (WAKE_MAGIC)
+
+static void gem_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct gem *gp = dev->priv;
+
+ /* Add more when I understand how to program the chip */
+ if (gp->has_wol) {
+ wol->supported = WOL_SUPPORTED_MASK;
+ wol->wolopts = gp->wake_on_lan;
+ } else {
+ wol->supported = 0;
+ wol->wolopts = 0;
+ }
+}
+
+static int gem_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct gem *gp = dev->priv;
+
+ if (!gp->has_wol)
+ return -EOPNOTSUPP;
+ gp->wake_on_lan = wol->wolopts & WOL_SUPPORTED_MASK;
+ return 0;
+}
+
static struct ethtool_ops gem_ethtool_ops = {
.get_drvinfo = gem_get_drvinfo,
.get_link = ethtool_op_get_link,
.nway_reset = gem_nway_reset,
.get_msglevel = gem_get_msglevel,
.set_msglevel = gem_set_msglevel,
+ .get_wol = gem_get_wol,
+ .set_wol = gem_set_wol,
};
static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
struct gem *gp = dev->priv;
struct mii_ioctl_data *data = if_mii(ifr);
int rc = -EOPNOTSUPP;
-
+ unsigned long flags;
+
/* Hold the PM semaphore while doing ioctl's or we may collide
- * with open/close and power management and oops.
+ * with power management.
*/
down(&gp->pm_sem);
-
+
+ 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. */
data->phy_id = gp->mii_phy_addr;
/* Fallthrough... */
case SIOCGMIIREG: /* Read MII PHY register. */
- if (!gp->hw_running)
- rc = -EIO;
+ if (!gp->running)
+ rc = -EAGAIN;
else {
- data->val_out = __phy_read(gp, data->phy_id & 0x1f, data->reg_num & 0x1f);
+ data->val_out = __phy_read(gp, data->phy_id & 0x1f,
+ data->reg_num & 0x1f);
rc = 0;
}
break;
case SIOCSMIIREG: /* Write MII PHY register. */
if (!capable(CAP_NET_ADMIN))
rc = -EPERM;
- else if (!gp->hw_running)
- rc = -EIO;
+ else if (!gp->running)
+ rc = -EAGAIN;
else {
- __phy_write(gp, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
+ __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);
up(&gp->pm_sem);
return 0;
}
+static void __devexit gem_remove_one(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+
+ if (dev) {
+ struct gem *gp = dev->priv;
+
+ unregister_netdev(dev);
+
+ /* Stop the link timer */
+ del_timer_sync(&gp->link_timer);
+
+ /* We shouldn't need any locking here */
+ gem_get_cell(gp);
+
+ /* Wait for a pending reset task to complete */
+ while (gp->reset_task_pending)
+ yield();
+ flush_scheduled_work();
+
+ /* 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),
+ gp->init_block,
+ gp->gblock_dvma);
+ iounmap(gp->regs);
+ pci_release_regions(pdev);
+ free_netdev(dev);
+
+ pci_set_drvdata(pdev, NULL);
+ }
+}
+
static int __devinit gem_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
}
pci_using_dac = 0;
}
-
+
gemreg_base = pci_resource_start(pdev, 0);
gemreg_len = pci_resource_len(pdev, 0);
gp->link_timer.function = gem_link_timer;
gp->link_timer.data = (unsigned long) gp;
- init_timer(&gp->pm_timer);
- gp->pm_timer.function = gem_pm_timer;
- gp->pm_timer.data = (unsigned long) gp;
-
- INIT_WORK(&gp->pm_task, gem_pm_task, gp);
INIT_WORK(&gp->reset_task, gem_reset_task, gp);
gp->lstate = link_down;
goto err_out_free_res;
}
- /* On Apple, we power the chip up now in order for check
- * invariants to work, but also because the firmware might
- * not have properly shut down the PHY.
+ /* On Apple, we want a reference to the Open Firmware device-tree
+ * node. We use it for clock control.
*/
#ifdef CONFIG_PPC_PMAC
gp->of_node = pci_device_to_OF_node(pdev);
- if (pdev->vendor == PCI_VENDOR_ID_APPLE)
- gem_apple_powerup(gp);
#endif
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
- gem_stop(gp);
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
+
+ /* Only Apple version supports WOL afaik */
+ if (pdev->vendor == PCI_VENDOR_ID_APPLE)
+ gp->has_wol = 1;
+
+ /* Make sure cell is enabled */
+ gem_get_cell(gp);
+
+ /* Make sure everything is stopped and in init state */
+ gem_reset(gp);
/* Fill up the mii_phy structure (even if we won't use it) */
gp->phy_mii.dev = dev;
/* By default, we start with autoneg */
gp->want_autoneg = 1;
-
+
+ /* Check fifo sizes, PHY type, etc... */
if (gem_check_invariants(gp)) {
err = -ENODEV;
goto err_out_iounmap;
dev->poll_controller = gem_poll_controller;
#endif
+ /* 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);
+
+ /* Register with kernel */
if (register_netdev(dev)) {
printk(KERN_ERR PFX "Cannot register net device, "
"aborting.\n");
i == 5 ? ' ' : ':');
printk("\n");
- /* Detect & init PHY, start autoneg */
- spin_lock_irq(&gp->lock);
- spin_lock(&gp->tx_lock);
- gp->hw_running = 1;
- gem_init_phy(gp);
- gem_begin_auto_negotiation(gp, NULL);
- spin_unlock(&gp->tx_lock);
- spin_unlock_irq(&gp->lock);
-
if (gp->phy_type == phy_mii_mdio0 ||
gp->phy_type == phy_mii_mdio1)
printk(KERN_INFO "%s: Found %s PHY\n", dev->name,
gp->phy_mii.def ? gp->phy_mii.def->name : "no");
- pci_set_drvdata(pdev, dev);
-
/* GEM can do it all... */
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_LLTX;
if (pci_using_dac)
dev->features |= NETIF_F_HIGHDMA;
- /* Fire the PM timer that will shut us down in about 10 seconds */
- gp->pm_timer.expires = jiffies + 10*HZ;
- add_timer(&gp->pm_timer);
-
return 0;
err_out_free_consistent:
- pci_free_consistent(pdev,
- sizeof(struct gem_init_block),
- gp->init_block,
- gp->gblock_dvma);
-
+ gem_remove_one(pdev);
err_out_iounmap:
- down(&gp->pm_sem);
- /* Stop the PM timer & task */
- del_timer_sync(&gp->pm_timer);
- flush_scheduled_work();
- if (gp->hw_running)
- gem_shutdown(gp);
- up(&gp->pm_sem);
-
+ gem_put_cell(gp);
iounmap(gp->regs);
err_out_free_res:
}
-static void __devexit gem_remove_one(struct pci_dev *pdev)
-{
- struct net_device *dev = pci_get_drvdata(pdev);
-
- if (dev) {
- struct gem *gp = dev->priv;
-
- unregister_netdev(dev);
-
- down(&gp->pm_sem);
- /* Stop the PM timer & task */
- del_timer_sync(&gp->pm_timer);
- flush_scheduled_work();
- if (gp->hw_running)
- gem_shutdown(gp);
- up(&gp->pm_sem);
-
- pci_free_consistent(pdev,
- sizeof(struct gem_init_block),
- gp->init_block,
- gp->gblock_dvma);
- iounmap(gp->regs);
- pci_release_regions(pdev);
- free_netdev(dev);
-
- pci_set_drvdata(pdev, NULL);
- }
-}
static struct pci_driver gem_driver = {
.name = GEM_MODULE_NAME,
git://git.onelab.eu / linux-2.6.git / blobdiff