diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/gianfar.c | 334 |
1 files changed, 176 insertions, 158 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c index f8497419550..c8735540b1e 100644 --- a/drivers/net/gianfar.c +++ b/drivers/net/gianfar.c @@ -147,6 +147,176 @@ MODULE_AUTHOR("Freescale Semiconductor, Inc"); MODULE_DESCRIPTION("Gianfar Ethernet Driver"); MODULE_LICENSE("GPL"); +static int gfar_alloc_skb_resources(struct net_device *ndev) +{ + struct txbd8 *txbdp; + struct rxbd8 *rxbdp; + dma_addr_t addr = 0; + void *vaddr; + int i; + struct gfar_private *priv = netdev_priv(ndev); + struct device *dev = &priv->ofdev->dev; + struct gfar __iomem *regs = priv->regs; + + /* Allocate memory for the buffer descriptors */ + vaddr = dma_alloc_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size + + sizeof(*rxbdp) * priv->rx_ring_size, + &addr, 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; + + /* 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(*txbdp) * priv->tx_ring_size; + vaddr = vaddr + sizeof(*txbdp) * priv->tx_ring_size; + priv->rx_bd_base = vaddr; + gfar_write(®s->rbase0, addr); + + /* 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; + + /* 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(ndev); + if (!skb) { + pr_err("%s: Can't allocate RX buffers\n", ndev->name); + goto cleanup; + } + + priv->rx_skbuff[i] = skb; + + gfar_new_rxbdp(ndev, rxbdp, skb); + + rxbdp++; + } + + 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; + + /* 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, @@ -927,106 +1097,17 @@ void gfar_start(struct net_device *dev) /* Bring the controller up and running */ int startup_gfar(struct net_device *ndev) { - struct txbd8 *txbdp; - struct rxbd8 *rxbdp; - dma_addr_t addr = 0; - void *vaddr; - int i; struct gfar_private *priv = netdev_priv(ndev); - struct device *dev = &priv->ofdev->dev; struct gfar __iomem *regs = priv->regs; int err; - u32 rctrl = 0; - u32 tctrl = 0; - u32 attrs = 0; gfar_write(®s->imask, IMASK_INIT_CLEAR); - /* Allocate memory for the buffer descriptors */ - vaddr = dma_alloc_coherent(dev, sizeof(*txbdp) * priv->tx_ring_size + - sizeof(*rxbdp) * priv->rx_ring_size, - &addr, 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; - - /* 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(*txbdp) * priv->tx_ring_size; - vaddr = vaddr + sizeof(*txbdp) * priv->tx_ring_size; - priv->rx_bd_base = vaddr; - gfar_write(®s->rbase0, addr); - - /* 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); - err = -ENOMEM; - goto tx_skb_fail; - } - - 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); - 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(ndev); - if (!skb) { - pr_err("%s: Can't allocate RX buffers\n", ndev->name); - err = -ENOMEM; - goto err_rxalloc_fail; - } - - priv->rx_skbuff[i] = skb; - - gfar_new_rxbdp(ndev, rxbdp, skb); + err = gfar_alloc_skb_resources(ndev); + if (err) + return err; - rxbdp++; - } + gfar_init_mac(ndev); /* If the device has multiple interrupts, register for * them. Otherwise, only register for the one */ @@ -1070,71 +1151,11 @@ int startup_gfar(struct net_device *ndev) } } - 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(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); - /* Start the controller */ gfar_start(ndev); + phy_start(priv->phydev); + return 0; rx_irq_fail: @@ -1142,9 +1163,6 @@ rx_irq_fail: tx_irq_fail: free_irq(priv->interruptError, ndev); err_irq_fail: -err_rxalloc_fail: -rx_skb_fail: -tx_skb_fail: free_skb_resources(priv); return err; } |