diff options
Diffstat (limited to 'drivers/net/gianfar.c')
| -rw-r--r-- | drivers/net/gianfar.c | 2010 |
1 files changed, 0 insertions, 2010 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c deleted file mode 100644 index 718cf77e345..00000000000 --- a/drivers/net/gianfar.c +++ /dev/null @@ -1,2010 +0,0 @@ -/* - * drivers/net/gianfar.c - * - * Gianfar Ethernet Driver - * This driver is designed for the non-CPM ethernet controllers - * on the 85xx and 83xx family of integrated processors - * Based on 8260_io/fcc_enet.c - * - * Author: Andy Fleming - * Maintainer: Kumar Gala - * - * Copyright (c) 2002-2006 Freescale Semiconductor, Inc. - * Copyright (c) 2007 MontaVista Software, Inc. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * Gianfar: AKA Lambda Draconis, "Dragon" - * RA 11 31 24.2 - * Dec +69 19 52 - * V 3.84 - * B-V +1.62 - * - * Theory of operation - * - * The driver is initialized through platform_device. Structures which - * define the configuration needed by the board are defined in a - * board structure in arch/ppc/platforms (though I do not - * discount the possibility that other architectures could one - * day be supported. - * - * The Gianfar Ethernet Controller uses a ring of buffer - * descriptors. The beginning is indicated by a register - * pointing to the physical address of the start of the ring. - * The end is determined by a "wrap" bit being set in the - * last descriptor of the ring. - * - * When a packet is received, the RXF bit in the - * IEVENT register is set, triggering an interrupt when the - * corresponding bit in the IMASK register is also set (if - * interrupt coalescing is active, then the interrupt may not - * happen immediately, but will wait until either a set number - * of frames or amount of time have passed). In NAPI, the - * interrupt handler will signal there is work to be done, and - * exit. Without NAPI, the packet(s) will be handled - * immediately. Both methods will start at the last known empty - * descriptor, and process every subsequent descriptor until there - * are none left with data (NAPI will stop after a set number of - * packets to give time to other tasks, but will eventually - * process all the packets). The data arrives inside a - * pre-allocated skb, and so after the skb is passed up to the - * stack, a new skb must be allocated, and the address field in - * the buffer descriptor must be updated to indicate this new - * skb. - * - * When the kernel requests that a packet be transmitted, the - * driver starts where it left off last time, and points the - * descriptor at the buffer which was passed in. The driver - * then informs the DMA engine that there are packets ready to - * be transmitted. Once the controller is finished transmitting - * the packet, an interrupt may be triggered (under the same - * conditions as for reception, but depending on the TXF bit). - * The driver then cleans up the buffer. - */ - -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/unistd.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/if_vlan.h> -#include <linux/spinlock.h> -#include <linux/mm.h> -#include <linux/platform_device.h> -#include <linux/ip.h> -#include <linux/tcp.h> -#include <linux/udp.h> -#include <linux/in.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/uaccess.h> -#include <linux/module.h> -#include <linux/dma-mapping.h> -#include <linux/crc32.h> -#include <linux/mii.h> -#include <linux/phy.h> - -#include "gianfar.h" -#include "gianfar_mii.h" - -#define TX_TIMEOUT (1*HZ) -#define SKB_ALLOC_TIMEOUT 1000000 -#undef BRIEF_GFAR_ERRORS -#undef VERBOSE_GFAR_ERRORS - -#ifdef CONFIG_GFAR_NAPI -#define RECEIVE(x) netif_receive_skb(x) -#else -#define RECEIVE(x) netif_rx(x) -#endif - -const char gfar_driver_name[] = "Gianfar Ethernet"; -const char gfar_driver_version[] = "1.3"; - -static int gfar_enet_open(struct net_device *dev); -static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev); -static void gfar_timeout(struct net_device *dev); -static int gfar_close(struct net_device *dev); -struct sk_buff *gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp); -static int gfar_set_mac_address(struct net_device *dev); -static int gfar_change_mtu(struct net_device *dev, int new_mtu); -static irqreturn_t gfar_error(int irq, void *dev_id); -static irqreturn_t gfar_transmit(int irq, void *dev_id); -static irqreturn_t gfar_interrupt(int irq, void *dev_id); -static void adjust_link(struct net_device *dev); -static void init_registers(struct net_device *dev); -static int init_phy(struct net_device *dev); -static int gfar_probe(struct platform_device *pdev); -static int gfar_remove(struct platform_device *pdev); -static void free_skb_resources(struct gfar_private *priv); -static void gfar_set_multi(struct net_device *dev); -static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr); -static void gfar_configure_serdes(struct net_device *dev); -extern int gfar_local_mdio_write(struct gfar_mii __iomem *regs, int mii_id, int regnum, u16 value); -extern int gfar_local_mdio_read(struct gfar_mii __iomem *regs, int mii_id, int regnum); -#ifdef CONFIG_GFAR_NAPI -static int gfar_poll(struct napi_struct *napi, int budget); -#endif -#ifdef CONFIG_NET_POLL_CONTROLLER -static void gfar_netpoll(struct net_device *dev); -#endif -int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit); -static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int length); -static void gfar_vlan_rx_register(struct net_device *netdev, - struct vlan_group *grp); -void gfar_halt(struct net_device *dev); -void gfar_start(struct net_device *dev); -static void gfar_clear_exact_match(struct net_device *dev); -static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr); - -extern const struct ethtool_ops gfar_ethtool_ops; - -MODULE_AUTHOR("Freescale Semiconductor, Inc"); -MODULE_DESCRIPTION("Gianfar Ethernet Driver"); -MODULE_LICENSE("GPL"); - -/* Returns 1 if incoming frames use an FCB */ -static inline int gfar_uses_fcb(struct gfar_private *priv) -{ - return (priv->vlan_enable || priv->rx_csum_enable); -} - -/* Set up the ethernet device structure, private data, - * and anything else we need before we start */ -static int gfar_probe(struct platform_device *pdev) -{ - u32 tempval; - struct net_device *dev = NULL; - struct gfar_private *priv = NULL; - struct gianfar_platform_data *einfo; - struct resource *r; - int err = 0; - DECLARE_MAC_BUF(mac); - - einfo = (struct gianfar_platform_data *) pdev->dev.platform_data; - - if (NULL == einfo) { - printk(KERN_ERR "gfar %d: Missing additional data!\n", - pdev->id); - - return -ENODEV; - } - - /* Create an ethernet device instance */ - dev = alloc_etherdev(sizeof (*priv)); - - if (NULL == dev) - return -ENOMEM; - - priv = netdev_priv(dev); - priv->dev = dev; - - /* Set the info in the priv to the current info */ - priv->einfo = einfo; - - /* fill out IRQ fields */ - if (einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { - priv->interruptTransmit = platform_get_irq_byname(pdev, "tx"); - priv->interruptReceive = platform_get_irq_byname(pdev, "rx"); - priv->interruptError = platform_get_irq_byname(pdev, "error"); - if (priv->interruptTransmit < 0 || priv->interruptReceive < 0 || priv->interruptError < 0) - goto regs_fail; - } else { - priv->interruptTransmit = platform_get_irq(pdev, 0); - if (priv->interruptTransmit < 0) - goto regs_fail; - } - - /* get a pointer to the register memory */ - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - priv->regs = ioremap(r->start, sizeof (struct gfar)); - - if (NULL == priv->regs) { - err = -ENOMEM; - goto regs_fail; - } - - spin_lock_init(&priv->txlock); - spin_lock_init(&priv->rxlock); - - platform_set_drvdata(pdev, dev); - - /* Stop the DMA engine now, in case it was running before */ - /* (The firmware could have used it, and left it running). */ - /* To do this, we write Graceful Receive Stop and Graceful */ - /* Transmit Stop, and then wait until the corresponding bits */ - /* in IEVENT indicate the stops have completed. */ - tempval = gfar_read(&priv->regs->dmactrl); - tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); - gfar_write(&priv->regs->dmactrl, tempval); - - tempval = gfar_read(&priv->regs->dmactrl); - tempval |= (DMACTRL_GRS | DMACTRL_GTS); - gfar_write(&priv->regs->dmactrl, tempval); - - while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC))) - cpu_relax(); - - /* Reset MAC layer */ - gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET); - - tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW); - gfar_write(&priv->regs->maccfg1, tempval); - - /* Initialize MACCFG2. */ - gfar_write(&priv->regs->maccfg2, MACCFG2_INIT_SETTINGS); - - /* Initialize ECNTRL */ - gfar_write(&priv->regs->ecntrl, ECNTRL_INIT_SETTINGS); - - /* Copy the station address into the dev structure, */ - memcpy(dev->dev_addr, einfo->mac_addr, MAC_ADDR_LEN); - - /* Set the dev->base_addr to the gfar reg region */ - dev->base_addr = (unsigned long) (priv->regs); - - SET_NETDEV_DEV(dev, &pdev->dev); - - /* Fill in the dev structure */ - dev->open = gfar_enet_open; - dev->hard_start_xmit = gfar_start_xmit; - dev->tx_timeout = gfar_timeout; - dev->watchdog_timeo = TX_TIMEOUT; -#ifdef CONFIG_GFAR_NAPI - netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT); -#endif -#ifdef CONFIG_NET_POLL_CONTROLLER - dev->poll_controller = gfar_netpoll; -#endif - dev->stop = gfar_close; - dev->change_mtu = gfar_change_mtu; - dev->mtu = 1500; - dev->set_multicast_list = gfar_set_multi; - - dev->ethtool_ops = &gfar_ethtool_ops; - - if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) { - priv->rx_csum_enable = 1; - dev->features |= NETIF_F_IP_CSUM; - } else - priv->rx_csum_enable = 0; - - priv->vlgrp = NULL; - - if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) { - dev->vlan_rx_register = gfar_vlan_rx_register; - - dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; - - priv->vlan_enable = 1; - } - - if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) { - priv->extended_hash = 1; - priv->hash_width = 9; - - priv->hash_regs[0] = &priv->regs->igaddr0; - priv->hash_regs[1] = &priv->regs->igaddr1; - priv->hash_regs[2] = &priv->regs->igaddr2; - priv->hash_regs[3] = &priv->regs->igaddr3; - priv->hash_regs[4] = &priv->regs->igaddr4; - priv->hash_regs[5] = &priv->regs->igaddr5; - priv->hash_regs[6] = &priv->regs->igaddr6; - priv->hash_regs[7] = &priv->regs->igaddr7; - priv->hash_regs[8] = &priv->regs->gaddr0; - priv->hash_regs[9] = &priv->regs->gaddr1; - priv->hash_regs[10] = &priv->regs->gaddr2; - priv->hash_regs[11] = &priv->regs->gaddr3; - priv->hash_regs[12] = &priv->regs->gaddr4; - priv->hash_regs[13] = &priv->regs->gaddr5; - priv->hash_regs[14] = &priv->regs->gaddr6; - priv->hash_regs[15] = &priv->regs->gaddr7; - - } else { - priv->extended_hash = 0; - priv->hash_width = 8; - - priv->hash_regs[0] = &priv->regs->gaddr0; - priv->hash_regs[1] = &priv->regs->gaddr1; - priv->hash_regs[2] = &priv->regs->gaddr2; - priv->hash_regs[3] = &priv->regs->gaddr3; - priv->hash_regs[4] = &priv->regs->gaddr4; - priv->hash_regs[5] = &priv->regs->gaddr5; - priv->hash_regs[6] = &priv->regs->gaddr6; - priv->hash_regs[7] = &priv->regs->gaddr7; - } - - if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_PADDING) - priv->padding = DEFAULT_PADDING; - else - priv->padding = 0; - - if (dev->features & NETIF_F_IP_CSUM) - dev->hard_header_len += GMAC_FCB_LEN; - - priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE; - priv->tx_ring_size = DEFAULT_TX_RING_SIZE; - priv->rx_ring_size = DEFAULT_RX_RING_SIZE; - - priv->txcoalescing = DEFAULT_TX_COALESCE; - priv->txcount = DEFAULT_TXCOUNT; - priv->txtime = DEFAULT_TXTIME; - priv->rxcoalescing = DEFAULT_RX_COALESCE; - priv->rxcount = DEFAULT_RXCOUNT; - priv->rxtime = DEFAULT_RXTIME; - - /* Enable most messages by default */ - priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1; - - err = register_netdev(dev); - - if (err) { - printk(KERN_ERR "%s: Cannot register net device, aborting.\n", - dev->name); - goto register_fail; - } - - /* Create all the sysfs files */ - gfar_init_sysfs(dev); - - /* Print out the device info */ - printk(KERN_INFO DEVICE_NAME "%s\n", - dev->name, print_mac(mac, dev->dev_addr)); - - /* Even more device info helps when determining which kernel */ - /* provided which set of benchmarks. */ -#ifdef CONFIG_GFAR_NAPI - printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name); -#else - printk(KERN_INFO "%s: Running with NAPI disabled\n", dev->name); -#endif - printk(KERN_INFO "%s: %d/%d RX/TX BD ring size\n", - dev->name, priv->rx_ring_size, priv->tx_ring_size); - - return 0; - -register_fail: - iounmap(priv->regs); -regs_fail: - free_netdev(dev); - return err; -} - -static int gfar_remove(struct platform_device *pdev) -{ - struct net_device *dev = platform_get_drvdata(pdev); - struct gfar_private *priv = netdev_priv(dev); - - platform_set_drvdata(pdev, NULL); - - iounmap(priv->regs); - free_netdev(dev); - - return 0; -} - - -/* Reads the controller's registers to determine what interface - * connects it to the PHY. - */ -static phy_interface_t gfar_get_interface(struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - u32 ecntrl = gfar_read(&priv->regs->ecntrl); - - if (ecntrl & ECNTRL_SGMII_MODE) - return PHY_INTERFACE_MODE_SGMII; - - if (ecntrl & ECNTRL_TBI_MODE) { - if (ecntrl & ECNTRL_REDUCED_MODE) - return PHY_INTERFACE_MODE_RTBI; - else - return PHY_INTERFACE_MODE_TBI; - } - - if (ecntrl & ECNTRL_REDUCED_MODE) { - if (ecntrl & ECNTRL_REDUCED_MII_MODE) - return PHY_INTERFACE_MODE_RMII; - else { - phy_interface_t interface = priv->einfo->interface; - - /* - * This isn't autodetected right now, so it must - * be set by the device tree or platform code. - */ - if (interface == PHY_INTERFACE_MODE_RGMII_ID) - return PHY_INTERFACE_MODE_RGMII_ID; - - return PHY_INTERFACE_MODE_RGMII; - } - } - - if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT) - return PHY_INTERFACE_MODE_GMII; - - return PHY_INTERFACE_MODE_MII; -} - - -/* Initializes driver's PHY state, and attaches to the PHY. - * Returns 0 on success. - */ -static int init_phy(struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - uint gigabit_support = - priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ? - SUPPORTED_1000baseT_Full : 0; - struct phy_device *phydev; - char phy_id[BUS_ID_SIZE]; - phy_interface_t interface; - - priv->oldlink = 0; - priv->oldspeed = 0; - priv->oldduplex = -1; - - snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, priv->einfo->bus_id, priv->einfo->phy_id); - - interface = gfar_get_interface(dev); - - phydev = phy_connect(dev, phy_id, &adjust_link, 0, interface); - - if (interface == PHY_INTERFACE_MODE_SGMII) - gfar_configure_serdes(dev); - - if (IS_ERR(phydev)) { - printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name); - return PTR_ERR(phydev); - } - - /* Remove any features not supported by the controller */ - phydev->supported &= (GFAR_SUPPORTED | gigabit_support); - phydev->advertising = phydev->supported; - - priv->phydev = phydev; - - return 0; -} - -static void gfar_configure_serdes(struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - struct gfar_mii __iomem *regs = - (void __iomem *)&priv->regs->gfar_mii_regs; - - /* Initialise TBI i/f to communicate with serdes (lynx phy) */ - - /* Single clk mode, mii mode off(for aerdes communication) */ - gfar_local_mdio_write(regs, TBIPA_VALUE, MII_TBICON, TBICON_CLK_SELECT); - - /* Supported pause and full-duplex, no half-duplex */ - gfar_local_mdio_write(regs, TBIPA_VALUE, MII_ADVERTISE, - ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | - ADVERTISE_1000XPSE_ASYM); - - /* ANEG enable, restart ANEG, full duplex mode, speed[1] set */ - gfar_local_mdio_write(regs, TBIPA_VALUE, MII_BMCR, BMCR_ANENABLE | - BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000); -} - -static void init_registers(struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - - /* Clear IEVENT */ - gfar_write(&priv->regs->ievent, IEVENT_INIT_CLEAR); - - /* Initialize IMASK */ - gfar_write(&priv->regs->imask, IMASK_INIT_CLEAR); - - /* Init hash registers to zero */ - gfar_write(&priv->regs->igaddr0, 0); - gfar_write(&priv->regs->igaddr1, 0); - gfar_write(&priv->regs->igaddr2, 0); - gfar_write(&priv->regs->igaddr3, 0); - gfar_write(&priv->regs->igaddr4, 0); - gfar_write(&priv->regs->igaddr5, 0); - gfar_write(&priv->regs->igaddr6, 0); - gfar_write(&priv->regs->igaddr7, 0); - - gfar_write(&priv->regs->gaddr0, 0); - gfar_write(&priv->regs->gaddr1, 0); - gfar_write(&priv->regs->gaddr2, 0); - gfar_write(&priv->regs->gaddr3, 0); - gfar_write(&priv->regs->gaddr4, 0); - gfar_write(&priv->regs->gaddr5, 0); - gfar_write(&priv->regs->gaddr6, 0); - gfar_write(&priv->regs->gaddr7, 0); - - /* Zero out the rmon mib registers if it has them */ - if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) { - memset_io(&(priv->regs->rmon), 0, sizeof (struct rmon_mib)); - - /* Mask off the CAM interrupts */ - gfar_write(&priv->regs->rmon.cam1, 0xffffffff); - gfar_write(&priv->regs->rmon.cam2, 0xffffffff); - } - - /* Initialize the max receive buffer length */ - gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); - - /* Initialize the Minimum Frame Length Register */ - gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS); - - /* Assign the TBI an address which won't conflict with the PHYs */ - gfar_write(&priv->regs->tbipa, TBIPA_VALUE); -} - - -/* Halt the receive and transmit queues */ -void gfar_halt(struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - struct gfar __iomem *regs = priv->regs; - u32 tempval; - - /* Mask all interrupts */ - gfar_write(®s->imask, IMASK_INIT_CLEAR); - - /* Clear all interrupts */ - gfar_write(®s->ievent, IEVENT_INIT_CLEAR); - - /* Stop the DMA, and wait for it to stop */ - tempval = gfar_read(&priv->regs->dmactrl); - if ((tempval & (DMACTRL_GRS | DMACTRL_GTS)) - != (DMACTRL_GRS | DMACTRL_GTS)) { - tempval |= (DMACTRL_GRS | DMACTRL_GTS); - gfar_write(&priv->regs->dmactrl, tempval); - - while (!(gfar_read(&priv->regs->ievent) & - (IEVENT_GRSC | IEVENT_GTSC))) - cpu_relax(); - } - - /* Disable Rx and Tx */ - tempval = gfar_read(®s->maccfg1); - tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN); - gfar_write(®s->maccfg1, tempval); -} - -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); - - /* Lock it down */ - spin_lock_irqsave(&priv->txlock, flags); - spin_lock(&priv->rxlock); - - gfar_halt(dev); - - spin_unlock(&priv->rxlock); - spin_unlock_irqrestore(&priv->txlock, flags); - - /* Free the IRQs */ - if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { - free_irq(priv->interruptError, dev); - free_irq(priv->interruptTransmit, dev); - free_irq(priv->interruptReceive, dev); - } else { - free_irq(priv->interruptTransmit, dev); - } - - free_skb_resources(priv); - - dma_free_coherent(&dev->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 rxbd8 *rxbdp; - struct txbd8 *txbdp; - int i; - - /* Go through all the buffer descriptors and free their data buffers */ - txbdp = priv->tx_bd_base; - - for (i = 0; i < priv->tx_ring_size; i++) { - - if (priv->tx_skbuff[i]) { - dma_unmap_single(&priv->dev->dev, txbdp->bufPtr, - txbdp->length, - DMA_TO_DEVICE); - dev_kfree_skb_any(priv->tx_skbuff[i]); - priv->tx_skbuff[i] = NULL; - } - } - - kfree(priv->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->dev->dev, rxbdp->bufPtr, - priv->rx_buffer_size, - DMA_FROM_DEVICE); - - dev_kfree_skb_any(priv->rx_skbuff[i]); - priv->rx_skbuff[i] = NULL; - } - - rxbdp->status = 0; - rxbdp->length = 0; - rxbdp->bufPtr = 0; - - rxbdp++; - } - - kfree(priv->rx_skbuff); - } -} - -void gfar_start(struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - struct gfar __iomem *regs = priv->regs; - u32 tempval; - - /* Enable Rx and Tx in MACCFG1 */ - tempval = gfar_read(®s->maccfg1); - tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN); - gfar_write(®s->maccfg1, tempval); - - /* Initialize DMACTRL to have WWR and WOP */ - tempval = gfar_read(&priv->regs->dmactrl); - tempval |= DMACTRL_INIT_SETTINGS; - gfar_write(&priv->regs->dmactrl, tempval); - - /* Make sure we aren't stopped */ - tempval = gfar_read(&priv->regs->dmactrl); - tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); - gfar_write(&priv->regs->dmactrl, tempval); - - /* Clear THLT/RHLT, so that the DMA starts polling now */ - gfar_write(®s->tstat, TSTAT_CLEAR_THALT); - gfar_write(®s->rstat, RSTAT_CLEAR_RHALT); - - /* Unmask the interrupts we look for */ - gfar_write(®s->imask, IMASK_DEFAULT); -} - -/* Bring the controller up and running */ -int startup_gfar(struct net_device *dev) -{ - 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 __iomem *regs = priv->regs; - int err = 0; - u32 rctrl = 0; - u32 attrs = 0; - - gfar_write(®s->imask, IMASK_INIT_CLEAR); - - /* Allocate memory for the buffer descriptors */ - vaddr = (unsigned long) dma_alloc_coherent(&dev->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->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->status = 0; - txbdp->length = 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 = NULL; - - rxbdp->status = 0; - - skb = gfar_new_skb(dev, rxbdp); - - priv->rx_skbuff[i] = skb; - - rxbdp++; - } - - /* Set the last descriptor in the ring to wrap */ - rxbdp--; - rxbdp->status |= RXBD_WRAP; - - /* If the device has multiple interrupts, register for - * them. Otherwise, only register for the one */ - if (priv->einfo->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, "enet_error", dev) < 0) { - if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, priv->interruptError); - - err = -1; - goto err_irq_fail; - } - - if (request_irq(priv->interruptTransmit, gfar_transmit, - 0, "enet_tx", dev) < 0) { - if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, priv->interruptTransmit); - - err = -1; - - goto tx_irq_fail; - } - - if (request_irq(priv->interruptReceive, gfar_receive, - 0, "enet_rx", dev) < 0) { - if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n", - dev->name, priv->interruptReceive); - - err = -1; - goto rx_irq_fail; - } - } else { - if (request_irq(priv->interruptTransmit, gfar_interrupt, - 0, "gfar_interrupt", dev) < 0) { - if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, priv->interruptError); - - err = -1; - goto err_irq_fail; - } - } - - phy_start(priv->phydev); - - /* Configure the coalescing support */ - if (priv->txcoalescing) - gfar_write(®s->txic, - mk_ic_value(priv->txcount, priv->txtime)); - else - gfar_write(®s->txic, 0); - - if (priv->rxcoalescing) - gfar_write(®s->rxic, - mk_ic_value(priv->rxcount, priv->rxtime)); - else - gfar_write(®s->rxic, 0); - - 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->vlan_enable) - rctrl |= RCTRL_VLAN; - - if (priv->padding) { - rctrl &= ~RCTRL_PAL_MASK; - rctrl |= RCTRL_PADDING(priv->padding); - } - - /* Init rctrl based on our settings */ - gfar_write(&priv->regs->rctrl, rctrl); - - if (dev->features & NETIF_F_IP_CSUM) - gfar_write(&priv->regs->tctrl, TCTRL_INIT_CSUM); - - /* 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); - - return 0; - -rx_irq_fail: - free_irq(priv->interruptTransmit, dev); -tx_irq_fail: - free_irq(priv->interruptError, dev); -err_irq_fail: -rx_skb_fail: - free_skb_resources(priv); -tx_skb_fail: - dma_free_coherent(&dev->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; -} - -/* Called when something needs to use the ethernet device */ -/* Returns 0 for success. */ -static int gfar_enet_open(struct net_device *dev) -{ -#ifdef CONFIG_GFAR_NAPI - struct gfar_private *priv = netdev_priv(dev); -#endif - int err; - -#ifdef CONFIG_GFAR_NAPI - napi_enable(&priv->napi); -#endif - - /* Initialize a bunch of registers */ - init_registers(dev); - - gfar_set_mac_address(dev); - - err = init_phy(dev); - - if(err) { -#ifdef CONFIG_GFAR_NAPI - napi_disable(&priv->napi); -#endif - return err; - } - - err = startup_gfar(dev); - if (err) { -#ifdef CONFIG_GFAR_NAPI - napi_disable(&priv->napi); -#endif - return err; - } - - netif_start_queue(dev); - - return err; -} - -static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb, struct txbd8 *bdp) -{ - struct txfcb *fcb = (struct txfcb *)skb_push (skb, GMAC_FCB_LEN); - - memset(fcb, 0, GMAC_FCB_LEN); - - return fcb; -} - -static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb) -{ - u8 flags = 0; - - /* If we're here, it's a IP packet with a TCP or UDP - * payload. We set it to checksum, using a pseudo-header - * we provide - */ - flags = TXFCB_DEFAULT; - - /* Tell the controller what the protocol is */ - /* And provide the already calculated phcs */ - if (ip_hdr(skb)->protocol == IPPROTO_UDP) { - flags |= TXFCB_UDP; - fcb->phcs = udp_hdr(skb)->check; - } else - fcb->phcs = tcp_hdr(skb)->check; - - /* l3os is the distance between the start of the - * frame (skb->data) and the start of the IP hdr. - * l4os is the distance between the start of the - * l3 hdr and the l4 hdr */ - fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN); - fcb->l4os = skb_network_header_len(skb); - - fcb->flags = flags; -} - -void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb) -{ - fcb->flags |= TXFCB_VLN; - fcb->vlctl = vlan_tx_tag_get(skb); -} - -/* This is called by the kernel when a frame is ready for transmission. */ -/* It is pointed to by the dev->hard_start_xmit function pointer */ -static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - struct txfcb *fcb = NULL; - struct txbd8 *txbdp; - u16 status; - unsigned long flags; - - /* Update transmit stats */ - dev->stats.tx_bytes += skb->len; - - /* Lock priv now */ - spin_lock_irqsave(&priv->txlock, flags); - - /* Point at the first free tx descriptor */ - txbdp = priv->cur_tx; - - /* Clear all but the WRAP status flags */ - status = txbdp->status & TXBD_WRAP; - - /* Set up checksumming */ - if (likely((dev->features & NETIF_F_IP_CSUM) - && (CHECKSUM_PARTIAL == skb->ip_summed))) { - fcb = gfar_add_fcb(skb, txbdp); - status |= TXBD_TOE; - gfar_tx_checksum(skb, fcb); - } - - if (priv->vlan_enable && - unlikely(priv->vlgrp && vlan_tx_tag_present(skb))) { - if (unlikely(NULL == fcb)) { - fcb = gfar_add_fcb(skb, txbdp); - status |= TXBD_TOE; - } - - gfar_tx_vlan(skb, fcb); - } - - /* Set buffer length and pointer */ - txbdp->length = skb->len; - txbdp->bufPtr = dma_map_single(&dev->dev, skb->data, - skb->len, DMA_TO_DEVICE); - - /* Save the skb pointer so we can free it later */ - priv->tx_skbuff[priv->skb_curtx] = skb; - - /* Update the current skb pointer (wrapping if this was the last) */ - priv->skb_curtx = - (priv->skb_curtx + 1) & TX_RING_MOD_MASK(priv->tx_ring_size); - - /* Flag the BD as interrupt-causing */ - status |= TXBD_INTERRUPT; - - /* Flag the BD as ready to go, last in frame, and */ - /* in need of CRC */ - status |= (TXBD_READY | TXBD_LAST | TXBD_CRC); - - dev->trans_start = jiffies; - - /* The powerpc-specific eieio() is used, as wmb() has too strong - * semantics (it requires synchronization between cacheable and - * uncacheable mappings, which eieio doesn't provide and which we - * don't need), thus requiring a more expensive sync instruction. At - * some point, the set of architecture-independent barrier functions - * should be expanded to include weaker barriers. - */ - - eieio(); - txbdp->status = status; - - /* If this was the last BD in the ring, the next one */ - /* is at the beginning of the ring */ - if (txbdp->status & TXBD_WRAP) - txbdp = priv->tx_bd_base; - else - txbdp++; - - /* If the next BD still needs to be cleaned up, then the bds - are full. We need to tell the kernel to stop sending us stuff. */ - if (txbdp == priv->dirty_tx) { - netif_stop_queue(dev); - - dev->stats.tx_fifo_errors++; - } - - /* Update the current txbd to the next one */ - priv->cur_tx = txbdp; - - /* Tell the DMA to go go go */ - gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); - - /* Unlock priv */ - spin_unlock_irqrestore(&priv->txlock, flags); - - return 0; -} - -/* Stops the kernel queue, and halts the controller */ -static int gfar_close(struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - -#ifdef CONFIG_GFAR_NAPI - napi_disable(&priv->napi); -#endif - - stop_gfar(dev); - - /* Disconnect from the PHY */ - phy_disconnect(priv->phydev); - priv->phydev = NULL; - - netif_stop_queue(dev); - - return 0; -} - -/* Changes the mac address if the controller is not running. */ -int gfar_set_mac_address(struct net_device *dev) -{ - gfar_set_mac_for_addr(dev, 0, dev->dev_addr); - - return 0; -} - - -/* Enables and disables VLAN insertion/extraction */ -static void gfar_vlan_rx_register(struct net_device *dev, - struct vlan_group *grp) -{ - struct gfar_private *priv = netdev_priv(dev); - unsigned long flags; - u32 tempval; - - spin_lock_irqsave(&priv->rxlock, flags); - - priv->vlgrp = grp; - - if (grp) { - /* Enable VLAN tag insertion */ - tempval = gfar_read(&priv->regs->tctrl); - tempval |= TCTRL_VLINS; - - gfar_write(&priv->regs->tctrl, tempval); - - /* Enable VLAN tag extraction */ - tempval = gfar_read(&priv->regs->rctrl); - tempval |= RCTRL_VLEX; - gfar_write(&priv->regs->rctrl, tempval); - } else { - /* Disable VLAN tag insertion */ - tempval = gfar_read(&priv->regs->tctrl); - tempval &= ~TCTRL_VLINS; - gfar_write(&priv->regs->tctrl, tempval); - - /* Disable VLAN tag extraction */ - tempval = gfar_read(&priv->regs->rctrl); - tempval &= ~RCTRL_VLEX; - gfar_write(&priv->regs->rctrl, tempval); - } - - spin_unlock_irqrestore(&priv->rxlock, flags); -} - -static int gfar_change_mtu(struct net_device *dev, int new_mtu) -{ - int tempsize, tempval; - struct gfar_private *priv = netdev_priv(dev); - int oldsize = priv->rx_buffer_size; - int frame_size = new_mtu + ETH_HLEN; - - if (priv->vlan_enable) - frame_size += VLAN_ETH_HLEN; - - if (gfar_uses_fcb(priv)) - frame_size += GMAC_FCB_LEN; - - frame_size += priv->padding; - - if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) { - if (netif_msg_drv(priv)) - printk(KERN_ERR "%s: Invalid MTU setting\n", - dev->name); - return -EINVAL; - } - - tempsize = - (frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) + - INCREMENTAL_BUFFER_SIZE; - - /* Only stop and start the controller if it isn't already - * stopped, and we changed something */ - if ((oldsize != tempsize) && (dev->flags & IFF_UP)) - stop_gfar(dev); - - priv->rx_buffer_size = tempsize; - - dev->mtu = new_mtu; - - gfar_write(&priv->regs->mrblr, priv->rx_buffer_size); - gfar_write(&priv->regs->maxfrm, priv->rx_buffer_size); - - /* If the mtu is larger than the max size for standard - * ethernet frames (ie, a jumbo frame), then set maccfg2 - * to allow huge frames, and to check the length */ - tempval = gfar_read(&priv->regs->maccfg2); - - if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE) - tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); - else - tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); - - gfar_write(&priv->regs->maccfg2, tempval); - - if ((oldsize != tempsize) && (dev->flags & IFF_UP)) - startup_gfar(dev); - - return 0; -} - -/* gfar_timeout gets called when a packet has not been - * transmitted after a set amount of time. - * For now, assume that clearing out all the structures, and - * starting over will fix the problem. */ -static void gfar_timeout(struct net_device *dev) -{ - dev->stats.tx_errors++; - - if (dev->flags & IFF_UP) { - stop_gfar(dev); - startup_gfar(dev); - } - - netif_schedule(dev); -} - -/* Interrupt Handler for Transmit complete */ -static irqreturn_t gfar_transmit(int irq, void *dev_id) -{ - struct net_device *dev = (struct net_device *) dev_id; - struct gfar_private *priv = netdev_priv(dev); - struct txbd8 *bdp; - - /* Clear IEVENT */ - gfar_write(&priv->regs->ievent, IEVENT_TX_MASK); - - /* Lock priv */ - spin_lock(&priv->txlock); - bdp = priv->dirty_tx; - while ((bdp->status & TXBD_READY) == 0) { - /* If dirty_tx and cur_tx are the same, then either the */ - /* ring is empty or full now (it could only be full in the beginning, */ - /* obviously). If it is empty, we are done. */ - if ((bdp == priv->cur_tx) && (netif_queue_stopped(dev) == 0)) - break; - - dev->stats.tx_packets++; - - /* Deferred means some collisions occurred during transmit, */ - /* but we eventually sent the packet. */ - if (bdp->status & TXBD_DEF) - dev->stats.collisions++; - - /* Free the sk buffer associated with this TxBD */ - dev_kfree_skb_irq(priv->tx_skbuff[priv->skb_dirtytx]); - priv->tx_skbuff[priv->skb_dirtytx] = NULL; - priv->skb_dirtytx = - (priv->skb_dirtytx + - 1) & TX_RING_MOD_MASK(priv->tx_ring_size); - - /* update bdp to point at next bd in the ring (wrapping if necessary) */ - if (bdp->status & TXBD_WRAP) - bdp = priv->tx_bd_base; - else - bdp++; - - /* Move dirty_tx to be the next bd */ - priv->dirty_tx = bdp; - - /* We freed a buffer, so now we can restart transmission */ - if (netif_queue_stopped(dev)) - netif_wake_queue(dev); - } /* while ((bdp->status & TXBD_READY) == 0) */ - - /* If we are coalescing the interrupts, reset the timer */ - /* Otherwise, clear it */ - if (priv->txcoalescing) - gfar_write(&priv->regs->txic, - mk_ic_value(priv->txcount, priv->txtime)); - else - gfar_write(&priv->regs->txic, 0); - - spin_unlock(&priv->txlock); - - return IRQ_HANDLED; -} - -struct sk_buff * gfar_new_skb(struct net_device *dev, struct rxbd8 *bdp) -{ - unsigned int alignamount; - struct gfar_private *priv = netdev_priv(dev); - struct sk_buff *skb = NULL; - unsigned int timeout = SKB_ALLOC_TIMEOUT; - - /* We have to allocate the skb, so keep trying till we succeed */ - while ((!skb) && timeout--) - skb = dev_alloc_skb(priv->rx_buffer_size + RXBUF_ALIGNMENT); - - if (NULL == skb) - return NULL; - - alignamount = RXBUF_ALIGNMENT - - (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1)); - - /* We need the data buffer to be aligned properly. We will reserve - * as many bytes as needed to align the data properly - */ - skb_reserve(skb, alignamount); - - bdp->bufPtr = dma_map_single(&dev->dev, skb->data, - priv->rx_buffer_size, DMA_FROM_DEVICE); - - bdp->length = 0; - - /* Mark the buffer empty */ - eieio(); - bdp->status |= (RXBD_EMPTY | RXBD_INTERRUPT); - - return skb; -} - -static inline void count_errors(unsigned short status, struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - struct net_device_stats *stats = &dev->stats; - struct gfar_extra_stats *estats = &priv->extra_stats; - - /* If the packet was truncated, none of the other errors - * matter */ - if (status & RXBD_TRUNCATED) { - stats->rx_length_errors++; - - estats->rx_trunc++; - - return; - } - /* Count the errors, if there were any */ - if (status & (RXBD_LARGE | RXBD_SHORT)) { - stats->rx_length_errors++; - - if (status & RXBD_LARGE) - estats->rx_large++; - else - estats->rx_short++; - } - if (status & RXBD_NONOCTET) { - stats->rx_frame_errors++; - estats->rx_nonoctet++; - } - if (status & RXBD_CRCERR) { - estats->rx_crcerr++; - stats->rx_crc_errors++; - } - if (status & RXBD_OVERRUN) { - estats->rx_overrun++; - stats->rx_crc_errors++; - } -} - -irqreturn_t gfar_receive(int irq, void *dev_id) -{ - struct net_device *dev = (struct net_device *) dev_id; - struct gfar_private *priv = netdev_priv(dev); -#ifdef CONFIG_GFAR_NAPI - u32 tempval; -#else - unsigned long flags; -#endif - - /* Clear IEVENT, so rx interrupt isn't called again - * because of this interrupt */ - gfar_write(&priv->regs->ievent, IEVENT_RX_MASK); - - /* support NAPI */ -#ifdef CONFIG_GFAR_NAPI - if (netif_rx_schedule_prep(dev, &priv->napi)) { - tempval = gfar_read(&priv->regs->imask); - tempval &= IMASK_RX_DISABLED; - gfar_write(&priv->regs->imask, tempval); - - __netif_rx_schedule(dev, &priv->napi); - } else { - if (netif_msg_rx_err(priv)) - printk(KERN_DEBUG "%s: receive called twice (%x)[%x]\n", - dev->name, gfar_read(&priv->regs->ievent), - gfar_read(&priv->regs->imask)); - } -#else - - spin_lock_irqsave(&priv->rxlock, flags); - gfar_clean_rx_ring(dev, priv->rx_ring_size); - - /* If we are coalescing interrupts, update the timer */ - /* Otherwise, clear it */ - if (priv->rxcoalescing) - gfar_write(&priv->regs->rxic, - mk_ic_value(priv->rxcount, priv->rxtime)); - else - gfar_write(&priv->regs->rxic, 0); - - spin_unlock_irqrestore(&priv->rxlock, flags); -#endif - - return IRQ_HANDLED; -} - -static inline int gfar_rx_vlan(struct sk_buff *skb, - struct vlan_group *vlgrp, unsigned short vlctl) -{ -#ifdef CONFIG_GFAR_NAPI - return vlan_hwaccel_receive_skb(skb, vlgrp, vlctl); -#else - return vlan_hwaccel_rx(skb, vlgrp, vlctl); -#endif -} - -static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb) -{ - /* If valid headers were found, and valid sums - * were verified, then we tell the kernel that no - * checksumming is necessary. Otherwise, it is */ - if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU)) - skb->ip_summed = CHECKSUM_UNNECESSARY; - else - skb->ip_summed = CHECKSUM_NONE; -} - - -static inline struct rxfcb *gfar_get_fcb(struct sk_buff *skb) -{ - struct rxfcb *fcb = (struct rxfcb *)skb->data; - - /* Remove the FCB from the skb */ - skb_pull(skb, GMAC_FCB_LEN); - - return fcb; -} - -/* gfar_process_frame() -- handle one incoming packet if skb - * isn't NULL. */ -static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, - int length) -{ - struct gfar_private *priv = netdev_priv(dev); - struct rxfcb *fcb = NULL; - - if (NULL == skb) { - if (netif_msg_rx_err(priv)) - printk(KERN_WARNING "%s: Missing skb!!.\n", dev->name); - dev->stats.rx_dropped++; - priv->extra_stats.rx_skbmissing++; - } else { - int ret; - - /* Prep the skb for the packet */ - skb_put(skb, length); - - /* Grab the FCB if there is one */ - if (gfar_uses_fcb(priv)) - fcb = gfar_get_fcb(skb); - - /* Remove the padded bytes, if there are any */ - if (priv->padding) - skb_pull(skb, priv->padding); - - if (priv->rx_csum_enable) - gfar_rx_checksum(skb, fcb); - - /* Tell the skb what kind of packet this is */ - skb->protocol = eth_type_trans(skb, dev); - - /* Send the packet up the stack */ - if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN))) - ret = gfar_rx_vlan(skb, priv->vlgrp, fcb->vlctl); - else - ret = RECEIVE(skb); - - if (NET_RX_DROP == ret) - priv->extra_stats.kernel_dropped++; - } - - return 0; -} - -/* gfar_clean_rx_ring() -- Processes each frame in the rx ring - * until the budget/quota has been reached. Returns the number - * of frames handled - */ -int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit) -{ - struct rxbd8 *bdp; - struct sk_buff *skb; - u16 pkt_len; - int howmany = 0; - struct gfar_private *priv = netdev_priv(dev); - - /* Get the first full descriptor */ - bdp = priv->cur_rx; - - while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) { - rmb(); - skb = priv->rx_skbuff[priv->skb_currx]; - - if (!(bdp->status & - (RXBD_LARGE | RXBD_SHORT | RXBD_NONOCTET - | RXBD_CRCERR | RXBD_OVERRUN | RXBD_TRUNCATED))) { - /* Increment the number of packets */ - dev->stats.rx_packets++; - howmany++; - - /* Remove the FCS from the packet length */ - pkt_len = bdp->length - 4; - - gfar_process_frame(dev, skb, pkt_len); - - dev->stats.rx_bytes += pkt_len; - } else { - count_errors(bdp->status, dev); - - if (skb) - dev_kfree_skb_any(skb); - - priv->rx_skbuff[priv->skb_currx] = NULL; - } - - dev->last_rx = jiffies; - - /* Clear the status flags for this buffer */ - bdp->status &= ~RXBD_STATS; - - /* Add another skb for the future */ - skb = gfar_new_skb(dev, bdp); - priv->rx_skbuff[priv->skb_currx] = skb; - - /* Update to the next pointer */ - if (bdp->status & RXBD_WRAP) - bdp = priv->rx_bd_base; - else - bdp++; - - /* update to point at the next skb */ - priv->skb_currx = - (priv->skb_currx + - 1) & RX_RING_MOD_MASK(priv->rx_ring_size); - - } - - /* Update the current rxbd pointer to be the next one */ - priv->cur_rx = bdp; - - return howmany; -} - -#ifdef CONFIG_GFAR_NAPI -static int gfar_poll(struct napi_struct *napi, int budget) -{ - struct gfar_private *priv = container_of(napi, struct gfar_private, napi); - struct net_device *dev = priv->dev; - int howmany; - - howmany = gfar_clean_rx_ring(dev, budget); - - if (howmany < budget) { - netif_rx_complete(dev, napi); - - /* Clear the halt bit in RSTAT */ - gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT); - - gfar_write(&priv->regs->imask, IMASK_DEFAULT); - - /* If we are coalescing interrupts, update the timer */ - /* Otherwise, clear it */ - if (priv->rxcoalescing) - gfar_write(&priv->regs->rxic, - mk_ic_value(priv->rxcount, priv->rxtime)); - else - gfar_write(&priv->regs->rxic, 0); - } - - return howmany; -} -#endif - -#ifdef CONFIG_NET_POLL_CONTROLLER -/* - * Polling 'interrupt' - used by things like netconsole to send skbs - * without having to re-enable interrupts. It's not called while - * the interrupt routine is executing. - */ -static void gfar_netpoll(struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - - /* If the device has multiple interrupts, run tx/rx */ - if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { - disable_irq(priv->interruptTransmit); - disable_irq(priv->interruptReceive); - disable_irq(priv->interruptError); - gfar_interrupt(priv->interruptTransmit, dev); - enable_irq(priv->interruptError); - enable_irq(priv->interruptReceive); - enable_irq(priv->interruptTransmit); - } else { - disable_irq(priv->interruptTransmit); - gfar_interrupt(priv->interruptTransmit, dev); - enable_irq(priv->interruptTransmit); - } -} -#endif - -/* The interrupt handler for devices with one interrupt */ -static irqreturn_t gfar_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct gfar_private *priv = netdev_priv(dev); - - /* Save ievent for future reference */ - u32 events = gfar_read(&priv->regs->ievent); - - /* Check for reception */ - if (events & IEVENT_RX_MASK) - gfar_receive(irq, dev_id); - - /* Check for transmit completion */ - if (events & IEVENT_TX_MASK) - gfar_transmit(irq, dev_id); - - /* Check for errors */ - if (events & IEVENT_ERR_MASK) - gfar_error(irq, dev_id); - - return IRQ_HANDLED; -} - -/* Called every time the controller might need to be made - * aware of new link state. The PHY code conveys this - * information through variables in the phydev structure, and this - * function converts those variables into the appropriate - * register values, and can bring down the device if needed. - */ -static void adjust_link(struct net_device *dev) -{ - struct gfar_private *priv = netdev_priv(dev); - struct gfar __iomem *regs = priv->regs; - unsigned long flags; - struct phy_device *phydev = priv->phydev; - int new_state = 0; - - spin_lock_irqsave(&priv->txlock, flags); - if (phydev->link) { - u32 tempval = gfar_read(®s->maccfg2); - u32 ecntrl = gfar_read(®s->ecntrl); - - /* Now we make sure that we can be in full duplex mode. - * If not, we operate in half-duplex mode. */ - if (phydev->duplex != priv->oldduplex) { - new_state = 1; - if (!(phydev->duplex)) - tempval &= ~(MACCFG2_FULL_DUPLEX); - else - tempval |= MACCFG2_FULL_DUPLEX; - - priv->oldduplex = phydev->duplex; - } - - if (phydev->speed != priv->oldspeed) { - new_state = 1; - switch (phydev->speed) { - case 1000: - tempval = - ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII); - break; - case 100: - case 10: - tempval = - ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII); - - /* Reduced mode distinguishes - * between 10 and 100 */ - if (phydev->speed == SPEED_100) - ecntrl |= ECNTRL_R100; - else - ecntrl &= ~(ECNTRL_R100); - break; - default: - if (netif_msg_link(priv)) - printk(KERN_WARNING - "%s: Ack! Speed (%d) is not 10/100/1000!\n", - dev->name, phydev->speed); - break; - } - - priv->oldspeed = phydev->speed; - } - - gfar_write(®s->maccfg2, tempval); - gfar_write(®s->ecntrl, ecntrl); - - if (!priv->oldlink) { - new_state = 1; - priv->oldlink = 1; - netif_schedule(dev); - } - } else if (priv->oldlink) { - new_state = 1; - priv->oldlink = 0; - priv->oldspeed = 0; - priv->oldduplex = -1; - } - - if (new_state && netif_msg_link(priv)) - phy_print_status(phydev); - - spin_unlock_irqrestore(&priv->txlock, flags); -} - -/* Update the hash table based on the current list of multicast - * addresses we subscribe to. Also, change the promiscuity of - * the device based on the flags (this function is called - * whenever dev->flags is changed */ -static void gfar_set_multi(struct net_device *dev) -{ - struct dev_mc_list *mc_ptr; - struct gfar_private *priv = netdev_priv(dev); - struct gfar __iomem *regs = priv->regs; - u32 tempval; - - if(dev->flags & IFF_PROMISC) { - /* Set RCTRL to PROM */ - tempval = gfar_read(®s->rctrl); - tempval |= RCTRL_PROM; - gfar_write(®s->rctrl, tempval); - } else { - /* Set RCTRL to not PROM */ - tempval = gfar_read(®s->rctrl); - tempval &= ~(RCTRL_PROM); - gfar_write(®s->rctrl, tempval); - } - - if(dev->flags & IFF_ALLMULTI) { - /* Set the hash to rx all multicast frames */ - gfar_write(®s->igaddr0, 0xffffffff); - gfar_write(®s->igaddr1, 0xffffffff); - gfar_write(®s->igaddr2, 0xffffffff); - gfar_write(®s->igaddr3, 0xffffffff); - gfar_write(®s->igaddr4, 0xffffffff); - gfar_write(®s->igaddr5, 0xffffffff); - gfar_write(®s->igaddr6, 0xffffffff); - gfar_write(®s->igaddr7, 0xffffffff); - gfar_write(®s->gaddr0, 0xffffffff); - gfar_write(®s->gaddr1, 0xffffffff); - gfar_write(®s->gaddr2, 0xffffffff); - gfar_write(®s->gaddr3, 0xffffffff); - gfar_write(®s->gaddr4, 0xffffffff); - gfar_write(®s->gaddr5, 0xffffffff); - gfar_write(®s->gaddr6, 0xffffffff); - gfar_write(®s->gaddr7, 0xffffffff); - } else { - int em_num; - int idx; - - /* zero out the hash */ - gfar_write(®s->igaddr0, 0x0); - gfar_write(®s->igaddr1, 0x0); - gfar_write(®s->igaddr2, 0x0); - gfar_write(®s->igaddr3, 0x0); - gfar_write(®s->igaddr4, 0x0); - gfar_write(®s->igaddr5, 0x0); - gfar_write(®s->igaddr6, 0x0); - gfar_write(®s->igaddr7, 0x0); - gfar_write(®s->gaddr0, 0x0); - gfar_write(®s->gaddr1, 0x0); - gfar_write(®s->gaddr2, 0x0); - gfar_write(®s->gaddr3, 0x0); - gfar_write(®s->gaddr4, 0x0); - gfar_write(®s->gaddr5, 0x0); - gfar_write(®s->gaddr6, 0x0); - gfar_write(®s->gaddr7, 0x0); - - /* If we have extended hash tables, we need to - * clear the exact match registers to prepare for - * setting them */ - if (priv->extended_hash) { - em_num = GFAR_EM_NUM + 1; - gfar_clear_exact_match(dev); - idx = 1; - } else { - idx = 0; - em_num = 0; - } - - if(dev->mc_count == 0) - return; - - /* Parse the list, and set the appropriate bits */ - for(mc_ptr = dev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) { - if (idx < em_num) { - gfar_set_mac_for_addr(dev, idx, - mc_ptr->dmi_addr); - idx++; - } else - gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr); - } - } - - return; -} - - -/* Clears each of the exact match registers to zero, so they - * don't interfere with normal reception */ -static void gfar_clear_exact_match(struct net_device *dev) -{ - int idx; - u8 zero_arr[MAC_ADDR_LEN] = {0,0,0,0,0,0}; - - for(idx = 1;idx < GFAR_EM_NUM + 1;idx++) - gfar_set_mac_for_addr(dev, idx, (u8 *)zero_arr); -} - -/* Set the appropriate hash bit for the given addr */ -/* The algorithm works like so: - * 1) Take the Destination Address (ie the multicast address), and - * do a CRC on it (little endian), and reverse the bits of the - * result. - * 2) Use the 8 most significant bits as a hash into a 256-entry - * table. The table is controlled through 8 32-bit registers: - * gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is - * gaddr7. This means that the 3 most significant bits in the - * hash index which gaddr register to use, and the 5 other bits - * indicate which bit (assuming an IBM numbering scheme, which - * for PowerPC (tm) is usually the case) in the register holds - * the entry. */ -static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr) -{ - u32 tempval; - struct gfar_private *priv = netdev_priv(dev); - u32 result = ether_crc(MAC_ADDR_LEN, addr); - int width = priv->hash_width; - u8 whichbit = (result >> (32 - width)) & 0x1f; - u8 whichreg = result >> (32 - width + 5); - u32 value = (1 << (31-whichbit)); - - tempval = gfar_read(priv->hash_regs[whichreg]); - tempval |= value; - gfar_write(priv->hash_regs[whichreg], tempval); - - return; -} - - -/* There are multiple MAC Address register pairs on some controllers - * This function sets the numth pair to a given address - */ -static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr) -{ - struct gfar_private *priv = netdev_priv(dev); - int idx; - char tmpbuf[MAC_ADDR_LEN]; - u32 tempval; - u32 __iomem *macptr = &priv->regs->macstnaddr1; - - macptr += num*2; - - /* Now copy it into the mac registers backwards, cuz */ - /* little endian is silly */ - for (idx = 0; idx < MAC_ADDR_LEN; idx++) - tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx]; - - gfar_write(macptr, *((u32 *) (tmpbuf))); - - tempval = *((u32 *) (tmpbuf + 4)); - - gfar_write(macptr+1, tempval); -} - -/* GFAR error interrupt handler */ -static irqreturn_t gfar_error(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct gfar_private *priv = netdev_priv(dev); - - /* Save ievent for future reference */ - u32 events = gfar_read(&priv->regs->ievent); - - /* Clear IEVENT */ - gfar_write(&priv->regs->ievent, IEVENT_ERR_MASK); - - /* Hmm... */ - if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv)) - printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n", - dev->name, events, gfar_read(&priv->regs->imask)); - - /* Update the error counters */ - if (events & IEVENT_TXE) { - dev->stats.tx_errors++; - - if (events & IEVENT_LC) - dev->stats.tx_window_errors++; - if (events & IEVENT_CRL) - dev->stats.tx_aborted_errors++; - if (events & IEVENT_XFUN) { - if (netif_msg_tx_err(priv)) - printk(KERN_DEBUG "%s: TX FIFO underrun, " - "packet dropped.\n", dev->name); - dev->stats.tx_dropped++; - priv->extra_stats.tx_underrun++; - - /* Reactivate the Tx Queues */ - gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT); - } - if (netif_msg_tx_err(priv)) - printk(KERN_DEBUG "%s: Transmit Error\n", dev->name); - } - if (events & IEVENT_BSY) { - dev->stats.rx_errors++; - priv->extra_stats.rx_bsy++; - - gfar_receive(irq, dev_id); - -#ifndef CONFIG_GFAR_NAPI - /* Clear the halt bit in RSTAT */ - gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT); -#endif - - if (netif_msg_rx_err(priv)) - printk(KERN_DEBUG "%s: busy error (rstat: %x)\n", - dev->name, gfar_read(&priv->regs->rstat)); - } - if (events & IEVENT_BABR) { - dev->stats.rx_errors++; - priv->extra_stats.rx_babr++; - - if (netif_msg_rx_err(priv)) - printk(KERN_DEBUG "%s: babbling RX error\n", dev->name); - } - if (events & IEVENT_EBERR) { - priv->extra_stats.eberr++; - if (netif_msg_rx_err(priv)) - printk(KERN_DEBUG "%s: bus error\n", dev->name); - } - if ((events & IEVENT_RXC) && netif_msg_rx_status(priv)) - printk(KERN_DEBUG "%s: control frame\n", dev->name); - - if (events & IEVENT_BABT) { - priv->extra_stats.tx_babt++; - if (netif_msg_tx_err(priv)) - printk(KERN_DEBUG "%s: babbling TX error\n", dev->name); - } - return IRQ_HANDLED; -} - -/* Structure for a device driver */ -static struct platform_driver gfar_driver = { - .probe = gfar_probe, - .remove = gfar_remove, - .driver = { - .name = "fsl-gianfar", - }, -}; - -static int __init gfar_init(void) -{ - int err = gfar_mdio_init(); - - if (err) - return err; - - err = platform_driver_register(&gfar_driver); - - if (err) - gfar_mdio_exit(); - - return err; -} - -static void __exit gfar_exit(void) -{ - platform_driver_unregister(&gfar_driver); - gfar_mdio_exit(); -} - -module_init(gfar_init); -module_exit(gfar_exit); - |