diff options
Diffstat (limited to 'drivers/net/gianfar.c')
-rw-r--r-- | drivers/net/gianfar.c | 591 |
1 files changed, 332 insertions, 259 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c index 1e5289ffef6f..c6f6d3b7f4df 100644 --- a/drivers/net/gianfar.c +++ b/drivers/net/gianfar.c @@ -147,6 +147,208 @@ MODULE_AUTHOR("Freescale Semiconductor, Inc"); MODULE_DESCRIPTION("Gianfar Ethernet Driver"); MODULE_LICENSE("GPL"); +static void gfar_init_rxbdp(struct net_device *dev, struct rxbd8 *bdp, + dma_addr_t buf) +{ + struct gfar_private *priv = netdev_priv(dev); + u32 lstatus; + + bdp->bufPtr = buf; + + lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT); + if (bdp == priv->rx_bd_base + priv->rx_ring_size - 1) + lstatus |= BD_LFLAG(RXBD_WRAP); + + eieio(); + + bdp->lstatus = lstatus; +} + +static int gfar_init_bds(struct net_device *ndev) +{ + struct gfar_private *priv = netdev_priv(ndev); + struct txbd8 *txbdp; + struct rxbd8 *rxbdp; + int i; + + /* Initialize some variables in our dev structure */ + priv->num_txbdfree = priv->tx_ring_size; + priv->dirty_tx = priv->cur_tx = priv->tx_bd_base; + priv->cur_rx = priv->rx_bd_base; + priv->skb_curtx = priv->skb_dirtytx = 0; + priv->skb_currx = 0; + + /* Initialize Transmit Descriptor Ring */ + txbdp = priv->tx_bd_base; + for (i = 0; i < priv->tx_ring_size; i++) { + txbdp->lstatus = 0; + txbdp->bufPtr = 0; + txbdp++; + } + + /* Set the last descriptor in the ring to indicate wrap */ + txbdp--; + txbdp->status |= TXBD_WRAP; + + rxbdp = priv->rx_bd_base; + for (i = 0; i < priv->rx_ring_size; i++) { + struct sk_buff *skb = priv->rx_skbuff[i]; + + if (skb) { + gfar_init_rxbdp(ndev, rxbdp, rxbdp->bufPtr); + } else { + skb = gfar_new_skb(ndev); + if (!skb) { + pr_err("%s: Can't allocate RX buffers\n", + ndev->name); + return -ENOMEM; + } + priv->rx_skbuff[i] = skb; + + gfar_new_rxbdp(ndev, rxbdp, skb); + } + + rxbdp++; + } + + return 0; +} + +static int gfar_alloc_skb_resources(struct net_device *ndev) +{ + void *vaddr; + int i; + struct gfar_private *priv = netdev_priv(ndev); + struct device *dev = &priv->ofdev->dev; + + /* Allocate memory for the buffer descriptors */ + vaddr = dma_alloc_coherent(dev, + sizeof(*priv->tx_bd_base) * priv->tx_ring_size + + sizeof(*priv->rx_bd_base) * priv->rx_ring_size, + &priv->tx_bd_dma_base, GFP_KERNEL); + if (!vaddr) { + if (netif_msg_ifup(priv)) + pr_err("%s: Could not allocate buffer descriptors!\n", + ndev->name); + return -ENOMEM; + } + + priv->tx_bd_base = vaddr; + + /* Start the rx descriptor ring where the tx ring leaves off */ + vaddr = vaddr + sizeof(*priv->tx_bd_base) * priv->tx_ring_size; + priv->rx_bd_base = vaddr; + + /* Setup the skbuff rings */ + priv->tx_skbuff = kmalloc(sizeof(*priv->tx_skbuff) * + priv->tx_ring_size, GFP_KERNEL); + if (!priv->tx_skbuff) { + if (netif_msg_ifup(priv)) + pr_err("%s: Could not allocate tx_skbuff\n", + ndev->name); + goto cleanup; + } + + for (i = 0; i < priv->tx_ring_size; i++) + priv->tx_skbuff[i] = NULL; + + priv->rx_skbuff = kmalloc(sizeof(*priv->rx_skbuff) * + priv->rx_ring_size, GFP_KERNEL); + if (!priv->rx_skbuff) { + if (netif_msg_ifup(priv)) + pr_err("%s: Could not allocate rx_skbuff\n", + ndev->name); + goto cleanup; + } + + for (i = 0; i < priv->rx_ring_size; i++) + priv->rx_skbuff[i] = NULL; + + if (gfar_init_bds(ndev)) + goto cleanup; + + return 0; + +cleanup: + free_skb_resources(priv); + return -ENOMEM; +} + +static void gfar_init_mac(struct net_device *ndev) +{ + struct gfar_private *priv = netdev_priv(ndev); + struct gfar __iomem *regs = priv->regs; + u32 rctrl = 0; + u32 tctrl = 0; + u32 attrs = 0; + + /* enet DMA only understands physical addresses */ + gfar_write(®s->tbase0, priv->tx_bd_dma_base); + gfar_write(®s->rbase0, priv->tx_bd_dma_base + + sizeof(*priv->tx_bd_base) * + priv->tx_ring_size); + + /* Configure the coalescing support */ + gfar_write(®s->txic, 0); + if (priv->txcoalescing) + gfar_write(®s->txic, priv->txic); + + gfar_write(®s->rxic, 0); + if (priv->rxcoalescing) + gfar_write(®s->rxic, priv->rxic); + + if (priv->rx_csum_enable) + rctrl |= RCTRL_CHECKSUMMING; + + if (priv->extended_hash) { + rctrl |= RCTRL_EXTHASH; + + gfar_clear_exact_match(ndev); + rctrl |= RCTRL_EMEN; + } + + if (priv->padding) { + rctrl &= ~RCTRL_PAL_MASK; + rctrl |= RCTRL_PADDING(priv->padding); + } + + /* keep vlan related bits if it's enabled */ + if (priv->vlgrp) { + rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT; + tctrl |= TCTRL_VLINS; + } + + /* Init rctrl based on our settings */ + gfar_write(®s->rctrl, rctrl); + + if (ndev->features & NETIF_F_IP_CSUM) + tctrl |= TCTRL_INIT_CSUM; + + gfar_write(®s->tctrl, tctrl); + + /* Set the extraction length and index */ + attrs = ATTRELI_EL(priv->rx_stash_size) | + ATTRELI_EI(priv->rx_stash_index); + + gfar_write(®s->attreli, attrs); + + /* Start with defaults, and add stashing or locking + * depending on the approprate variables */ + attrs = ATTR_INIT_SETTINGS; + + if (priv->bd_stash_en) + attrs |= ATTR_BDSTASH; + + if (priv->rx_stash_size != 0) + attrs |= ATTR_BUFSTASH; + + gfar_write(®s->attr, attrs); + + gfar_write(®s->fifo_tx_thr, priv->fifo_threshold); + gfar_write(®s->fifo_tx_starve, priv->fifo_starve); + gfar_write(®s->fifo_tx_starve_shutoff, priv->fifo_starve_off); +} + static const struct net_device_ops gfar_netdev_ops = { .ndo_open = gfar_enet_open, .ndo_start_xmit = gfar_start_xmit, @@ -498,23 +700,24 @@ static int gfar_remove(struct of_device *ofdev) } #ifdef CONFIG_PM -static int gfar_suspend(struct of_device *ofdev, pm_message_t state) + +static int gfar_suspend(struct device *dev) { - struct gfar_private *priv = dev_get_drvdata(&ofdev->dev); - struct net_device *dev = priv->ndev; + struct gfar_private *priv = dev_get_drvdata(dev); + struct net_device *ndev = priv->ndev; unsigned long flags; u32 tempval; int magic_packet = priv->wol_en && (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); - netif_device_detach(dev); + netif_device_detach(ndev); - if (netif_running(dev)) { + if (netif_running(ndev)) { spin_lock_irqsave(&priv->txlock, flags); spin_lock(&priv->rxlock); - gfar_halt_nodisable(dev); + gfar_halt_nodisable(ndev); /* Disable Tx, and Rx if wake-on-LAN is disabled. */ tempval = gfar_read(&priv->regs->maccfg1); @@ -547,17 +750,17 @@ static int gfar_suspend(struct of_device *ofdev, pm_message_t state) return 0; } -static int gfar_resume(struct of_device *ofdev) +static int gfar_resume(struct device *dev) { - struct gfar_private *priv = dev_get_drvdata(&ofdev->dev); - struct net_device *dev = priv->ndev; + struct gfar_private *priv = dev_get_drvdata(dev); + struct net_device *ndev = priv->ndev; unsigned long flags; u32 tempval; int magic_packet = priv->wol_en && (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); - if (!netif_running(dev)) { - netif_device_attach(dev); + if (!netif_running(ndev)) { + netif_device_attach(ndev); return 0; } @@ -575,20 +778,71 @@ static int gfar_resume(struct of_device *ofdev) tempval &= ~MACCFG2_MPEN; gfar_write(&priv->regs->maccfg2, tempval); - gfar_start(dev); + gfar_start(ndev); spin_unlock(&priv->rxlock); spin_unlock_irqrestore(&priv->txlock, flags); - netif_device_attach(dev); + netif_device_attach(ndev); + + napi_enable(&priv->napi); + + return 0; +} + +static int gfar_restore(struct device *dev) +{ + struct gfar_private *priv = dev_get_drvdata(dev); + struct net_device *ndev = priv->ndev; + + if (!netif_running(ndev)) + return 0; + + gfar_init_bds(ndev); + init_registers(ndev); + gfar_set_mac_address(ndev); + gfar_init_mac(ndev); + gfar_start(ndev); + + priv->oldlink = 0; + priv->oldspeed = 0; + priv->oldduplex = -1; + + if (priv->phydev) + phy_start(priv->phydev); + netif_device_attach(ndev); napi_enable(&priv->napi); return 0; } + +static struct dev_pm_ops gfar_pm_ops = { + .suspend = gfar_suspend, + .resume = gfar_resume, + .freeze = gfar_suspend, + .thaw = gfar_resume, + .restore = gfar_restore, +}; + +#define GFAR_PM_OPS (&gfar_pm_ops) + +static int gfar_legacy_suspend(struct of_device *ofdev, pm_message_t state) +{ + return gfar_suspend(&ofdev->dev); +} + +static int gfar_legacy_resume(struct of_device *ofdev) +{ + return gfar_resume(&ofdev->dev); +} + #else -#define gfar_suspend NULL -#define gfar_resume NULL + +#define GFAR_PM_OPS NULL +#define gfar_legacy_suspend NULL +#define gfar_legacy_resume NULL + #endif /* Reads the controller's registers to determine what interface @@ -806,7 +1060,6 @@ void gfar_halt(struct net_device *dev) void stop_gfar(struct net_device *dev) { struct gfar_private *priv = netdev_priv(dev); - struct gfar __iomem *regs = priv->regs; unsigned long flags; phy_stop(priv->phydev); @@ -830,18 +1083,13 @@ void stop_gfar(struct net_device *dev) } free_skb_resources(priv); - - dma_free_coherent(&priv->ofdev->dev, - sizeof(struct txbd8)*priv->tx_ring_size - + sizeof(struct rxbd8)*priv->rx_ring_size, - priv->tx_bd_base, - gfar_read(®s->tbase0)); } /* If there are any tx skbs or rx skbs still around, free them. * Then free tx_skbuff and rx_skbuff */ static void free_skb_resources(struct gfar_private *priv) { + struct device *dev = &priv->ofdev->dev; struct rxbd8 *rxbdp; struct txbd8 *txbdp; int i, j; @@ -849,6 +1097,9 @@ static void free_skb_resources(struct gfar_private *priv) /* Go through all the buffer descriptors and free their data buffers */ txbdp = priv->tx_bd_base; + if (!priv->tx_skbuff) + goto skip_tx_skbuff; + for (i = 0; i < priv->tx_ring_size; i++) { if (!priv->tx_skbuff[i]) continue; @@ -867,30 +1118,33 @@ static void free_skb_resources(struct gfar_private *priv) } kfree(priv->tx_skbuff); +skip_tx_skbuff: rxbdp = priv->rx_bd_base; - /* rx_skbuff is not guaranteed to be allocated, so only - * free it and its contents if it is allocated */ - if(priv->rx_skbuff != NULL) { - for (i = 0; i < priv->rx_ring_size; i++) { - if (priv->rx_skbuff[i]) { - dma_unmap_single(&priv->ofdev->dev, rxbdp->bufPtr, - priv->rx_buffer_size, - DMA_FROM_DEVICE); - - dev_kfree_skb_any(priv->rx_skbuff[i]); - priv->rx_skbuff[i] = NULL; - } - - rxbdp->lstatus = 0; - rxbdp->bufPtr = 0; + if (!priv->rx_skbuff) + goto skip_rx_skbuff; - rxbdp++; + for (i = 0; i < priv->rx_ring_size; i++) { + if (priv->rx_skbuff[i]) { + dma_unmap_single(&priv->ofdev->dev, rxbdp->bufPtr, + priv->rx_buffer_size, + DMA_FROM_DEVICE); + dev_kfree_skb_any(priv->rx_skbuff[i]); + priv->rx_skbuff[i] = NULL; } - kfree(priv->rx_skbuff); + rxbdp->lstatus = 0; + rxbdp->bufPtr = 0; + rxbdp++; } + + kfree(priv->rx_skbuff); +skip_rx_skbuff: + + dma_free_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size + + sizeof(*rxbdp) * priv->rx_ring_size, + priv->tx_bd_base, priv->tx_bd_dma_base); } void gfar_start(struct net_device *dev) @@ -925,249 +1179,75 @@ void gfar_start(struct net_device *dev) } /* Bring the controller up and running */ -int startup_gfar(struct net_device *dev) +int startup_gfar(struct net_device *ndev) { - struct txbd8 *txbdp; - struct rxbd8 *rxbdp; - dma_addr_t addr = 0; - unsigned long vaddr; - int i; - struct gfar_private *priv = netdev_priv(dev); + struct gfar_private *priv = netdev_priv(ndev); struct gfar __iomem *regs = priv->regs; - int err = 0; - u32 rctrl = 0; - u32 tctrl = 0; - u32 attrs = 0; + int err; gfar_write(®s->imask, IMASK_INIT_CLEAR); - /* Allocate memory for the buffer descriptors */ - vaddr = (unsigned long) dma_alloc_coherent(&priv->ofdev->dev, - sizeof (struct txbd8) * priv->tx_ring_size + - sizeof (struct rxbd8) * priv->rx_ring_size, - &addr, GFP_KERNEL); - - if (vaddr == 0) { - if (netif_msg_ifup(priv)) - printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n", - dev->name); - return -ENOMEM; - } - - priv->tx_bd_base = (struct txbd8 *) vaddr; - - /* enet DMA only understands physical addresses */ - gfar_write(®s->tbase0, addr); - - /* Start the rx descriptor ring where the tx ring leaves off */ - addr = addr + sizeof (struct txbd8) * priv->tx_ring_size; - vaddr = vaddr + sizeof (struct txbd8) * priv->tx_ring_size; - priv->rx_bd_base = (struct rxbd8 *) vaddr; - gfar_write(®s->rbase0, addr); - - /* Setup the skbuff rings */ - priv->tx_skbuff = - (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) * - priv->tx_ring_size, GFP_KERNEL); - - if (NULL == priv->tx_skbuff) { - if (netif_msg_ifup(priv)) - printk(KERN_ERR "%s: Could not allocate tx_skbuff\n", - dev->name); - err = -ENOMEM; - goto tx_skb_fail; - } - - for (i = 0; i < priv->tx_ring_size; i++) - priv->tx_skbuff[i] = NULL; - - priv->rx_skbuff = - (struct sk_buff **) kmalloc(sizeof (struct sk_buff *) * - priv->rx_ring_size, GFP_KERNEL); - - if (NULL == priv->rx_skbuff) { - if (netif_msg_ifup(priv)) - printk(KERN_ERR "%s: Could not allocate rx_skbuff\n", - dev->name); - err = -ENOMEM; - goto rx_skb_fail; - } - - for (i = 0; i < priv->rx_ring_size; i++) - priv->rx_skbuff[i] = NULL; - - /* Initialize some variables in our dev structure */ - priv->num_txbdfree = priv->tx_ring_size; - priv->dirty_tx = priv->cur_tx = priv->tx_bd_base; - priv->cur_rx = priv->rx_bd_base; - priv->skb_curtx = priv->skb_dirtytx = 0; - priv->skb_currx = 0; - - /* Initialize Transmit Descriptor Ring */ - txbdp = priv->tx_bd_base; - for (i = 0; i < priv->tx_ring_size; i++) { - txbdp->lstatus = 0; - txbdp->bufPtr = 0; - txbdp++; - } - - /* Set the last descriptor in the ring to indicate wrap */ - txbdp--; - txbdp->status |= TXBD_WRAP; - - rxbdp = priv->rx_bd_base; - for (i = 0; i < priv->rx_ring_size; i++) { - struct sk_buff *skb; - - skb = gfar_new_skb(dev); - - if (!skb) { - printk(KERN_ERR "%s: Can't allocate RX buffers\n", - dev->name); - - goto err_rxalloc_fail; - } - - priv->rx_skbuff[i] = skb; - - gfar_new_rxbdp(dev, rxbdp, skb); - - rxbdp++; - } + err = gfar_alloc_skb_resources(ndev); + if (err) + return err; - /* Set the last descriptor in the ring to wrap */ - rxbdp--; - rxbdp->status |= RXBD_WRAP; + gfar_init_mac(ndev); /* If the device has multiple interrupts, register for * them. Otherwise, only register for the one */ if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { /* Install our interrupt handlers for Error, * Transmit, and Receive */ - if (request_irq(priv->interruptError, gfar_error, - 0, priv->int_name_er, dev) < 0) { + err = request_irq(priv->interruptError, gfar_error, 0, + priv->int_name_er, ndev); + if (err) { if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, priv->interruptError); - - err = -1; + pr_err("%s: Can't get IRQ %d\n", ndev->name, + priv->interruptError); goto err_irq_fail; } - if (request_irq(priv->interruptTransmit, gfar_transmit, - 0, priv->int_name_tx, dev) < 0) { + err = request_irq(priv->interruptTransmit, gfar_transmit, 0, + priv->int_name_tx, ndev); + if (err) { if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, priv->interruptTransmit); - - err = -1; - + pr_err("%s: Can't get IRQ %d\n", ndev->name, + priv->interruptTransmit); goto tx_irq_fail; } - if (request_irq(priv->interruptReceive, gfar_receive, - 0, priv->int_name_rx, dev) < 0) { + err = request_irq(priv->interruptReceive, gfar_receive, 0, + priv->int_name_rx, ndev); + if (err) { if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n", - dev->name, priv->interruptReceive); - - err = -1; + pr_err("%s: Can't get IRQ %d (receive0)\n", + ndev->name, priv->interruptReceive); goto rx_irq_fail; } } else { - if (request_irq(priv->interruptTransmit, gfar_interrupt, - 0, priv->int_name_tx, dev) < 0) { + err = request_irq(priv->interruptTransmit, gfar_interrupt, + 0, priv->int_name_tx, ndev); + if (err) { if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, priv->interruptTransmit); - - err = -1; + pr_err("%s: Can't get IRQ %d\n", ndev->name, + priv->interruptTransmit); goto err_irq_fail; } } - phy_start(priv->phydev); - - /* Configure the coalescing support */ - gfar_write(®s->txic, 0); - if (priv->txcoalescing) - gfar_write(®s->txic, priv->txic); - - gfar_write(®s->rxic, 0); - if (priv->rxcoalescing) - gfar_write(®s->rxic, priv->rxic); - - if (priv->rx_csum_enable) - rctrl |= RCTRL_CHECKSUMMING; - - if (priv->extended_hash) { - rctrl |= RCTRL_EXTHASH; - - gfar_clear_exact_match(dev); - rctrl |= RCTRL_EMEN; - } - - if (priv->padding) { - rctrl &= ~RCTRL_PAL_MASK; - rctrl |= RCTRL_PADDING(priv->padding); - } - - /* keep vlan related bits if it's enabled */ - if (priv->vlgrp) { - rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT; - tctrl |= TCTRL_VLINS; - } - - /* Init rctrl based on our settings */ - gfar_write(&priv->regs->rctrl, rctrl); - - if (dev->features & NETIF_F_IP_CSUM) - tctrl |= TCTRL_INIT_CSUM; - - gfar_write(&priv->regs->tctrl, tctrl); - - /* Set the extraction length and index */ - attrs = ATTRELI_EL(priv->rx_stash_size) | - ATTRELI_EI(priv->rx_stash_index); - - gfar_write(&priv->regs->attreli, attrs); - - /* Start with defaults, and add stashing or locking - * depending on the approprate variables */ - attrs = ATTR_INIT_SETTINGS; - - if (priv->bd_stash_en) - attrs |= ATTR_BDSTASH; - - if (priv->rx_stash_size != 0) - attrs |= ATTR_BUFSTASH; - - gfar_write(&priv->regs->attr, attrs); - - gfar_write(&priv->regs->fifo_tx_thr, priv->fifo_threshold); - gfar_write(&priv->regs->fifo_tx_starve, priv->fifo_starve); - gfar_write(&priv->regs->fifo_tx_starve_shutoff, priv->fifo_starve_off); - /* Start the controller */ - gfar_start(dev); + gfar_start(ndev); + + phy_start(priv->phydev); return 0; rx_irq_fail: - free_irq(priv->interruptTransmit, dev); + free_irq(priv->interruptTransmit, ndev); tx_irq_fail: - free_irq(priv->interruptError, dev); + free_irq(priv->interruptError, ndev); err_irq_fail: -err_rxalloc_fail: -rx_skb_fail: free_skb_resources(priv); -tx_skb_fail: - dma_free_coherent(&priv->ofdev->dev, - sizeof(struct txbd8)*priv->tx_ring_size - + sizeof(struct rxbd8)*priv->rx_ring_size, - priv->tx_bd_base, - gfar_read(®s->tbase0)); - return err; } @@ -1681,19 +1761,11 @@ static void gfar_new_rxbdp(struct net_device *dev, struct rxbd8 *bdp, struct sk_buff *skb) { struct gfar_private *priv = netdev_priv(dev); - u32 lstatus; - - bdp->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data, - priv->rx_buffer_size, DMA_FROM_DEVICE); + dma_addr_t buf; - lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT); - - if (bdp == priv->rx_bd_base + priv->rx_ring_size - 1) - lstatus |= BD_LFLAG(RXBD_WRAP); - - eieio(); - - bdp->lstatus = lstatus; + buf = dma_map_single(&priv->ofdev->dev, skb->data, + priv->rx_buffer_size, DMA_FROM_DEVICE); + gfar_init_rxbdp(dev, bdp, buf); } @@ -2344,8 +2416,9 @@ static struct of_platform_driver gfar_driver = { .probe = gfar_probe, .remove = gfar_remove, - .suspend = gfar_suspend, - .resume = gfar_resume, + .suspend = gfar_legacy_suspend, + .resume = gfar_legacy_resume, + .driver.pm = GFAR_PM_OPS, }; static int __init gfar_init(void) |