diff options
Diffstat (limited to 'drivers/net/ethernet/freescale/gianfar.c')
| -rw-r--r-- | drivers/net/ethernet/freescale/gianfar.c | 3291 |
1 files changed, 3291 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c new file mode 100644 index 00000000000..2659daad783 --- /dev/null +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -0,0 +1,3291 @@ +/* + * 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 + * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com> + * + * Copyright 2002-2009, 2011 Freescale Semiconductor, Inc. + * Copyright 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 of_device. Configuration information + * is therefore conveyed through an OF-style device tree. + * + * 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. This method 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. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#define DEBUG + +#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/of_mdio.h> +#include <linux/of_platform.h> +#include <linux/ip.h> +#include <linux/tcp.h> +#include <linux/udp.h> +#include <linux/in.h> +#include <linux/net_tstamp.h> + +#include <asm/io.h> +#include <asm/reg.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 <linux/phy_fixed.h> +#include <linux/of.h> +#include <linux/of_net.h> + +#include "gianfar.h" +#include "fsl_pq_mdio.h" + +#define TX_TIMEOUT (1*HZ) +#undef BRIEF_GFAR_ERRORS +#undef VERBOSE_GFAR_ERRORS + +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_reset_task(struct work_struct *work); +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); +static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp, + struct sk_buff *skb); +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 *ofdev); +static int gfar_remove(struct platform_device *ofdev); +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); +static int gfar_poll(struct napi_struct *napi, int budget); +#ifdef CONFIG_NET_POLL_CONTROLLER +static void gfar_netpoll(struct net_device *dev); +#endif +int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit); +static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue); +static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, + int amount_pull); +void gfar_halt(struct net_device *dev); +static void gfar_halt_nodisable(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, + const u8 *addr); +static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); + +MODULE_AUTHOR("Freescale Semiconductor, Inc"); +MODULE_DESCRIPTION("Gianfar Ethernet Driver"); +MODULE_LICENSE("GPL"); + +static void gfar_init_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp, + dma_addr_t buf) +{ + u32 lstatus; + + bdp->bufPtr = buf; + + lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT); + if (bdp == rx_queue->rx_bd_base + rx_queue->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 gfar_priv_tx_q *tx_queue = NULL; + struct gfar_priv_rx_q *rx_queue = NULL; + struct txbd8 *txbdp; + struct rxbd8 *rxbdp; + int i, j; + + for (i = 0; i < priv->num_tx_queues; i++) { + tx_queue = priv->tx_queue[i]; + /* Initialize some variables in our dev structure */ + tx_queue->num_txbdfree = tx_queue->tx_ring_size; + tx_queue->dirty_tx = tx_queue->tx_bd_base; + tx_queue->cur_tx = tx_queue->tx_bd_base; + tx_queue->skb_curtx = 0; + tx_queue->skb_dirtytx = 0; + + /* Initialize Transmit Descriptor Ring */ + txbdp = tx_queue->tx_bd_base; + for (j = 0; j < tx_queue->tx_ring_size; j++) { + txbdp->lstatus = 0; + txbdp->bufPtr = 0; + txbdp++; + } + + /* Set the last descriptor in the ring to indicate wrap */ + txbdp--; + txbdp->status |= TXBD_WRAP; + } + + for (i = 0; i < priv->num_rx_queues; i++) { + rx_queue = priv->rx_queue[i]; + rx_queue->cur_rx = rx_queue->rx_bd_base; + rx_queue->skb_currx = 0; + rxbdp = rx_queue->rx_bd_base; + + for (j = 0; j < rx_queue->rx_ring_size; j++) { + struct sk_buff *skb = rx_queue->rx_skbuff[j]; + + if (skb) { + gfar_init_rxbdp(rx_queue, rxbdp, + rxbdp->bufPtr); + } else { + skb = gfar_new_skb(ndev); + if (!skb) { + netdev_err(ndev, "Can't allocate RX buffers\n"); + goto err_rxalloc_fail; + } + rx_queue->rx_skbuff[j] = skb; + + gfar_new_rxbdp(rx_queue, rxbdp, skb); + } + + rxbdp++; + } + + } + + return 0; + +err_rxalloc_fail: + free_skb_resources(priv); + return -ENOMEM; +} + +static int gfar_alloc_skb_resources(struct net_device *ndev) +{ + void *vaddr; + dma_addr_t addr; + int i, j, k; + struct gfar_private *priv = netdev_priv(ndev); + struct device *dev = &priv->ofdev->dev; + struct gfar_priv_tx_q *tx_queue = NULL; + struct gfar_priv_rx_q *rx_queue = NULL; + + priv->total_tx_ring_size = 0; + for (i = 0; i < priv->num_tx_queues; i++) + priv->total_tx_ring_size += priv->tx_queue[i]->tx_ring_size; + + priv->total_rx_ring_size = 0; + for (i = 0; i < priv->num_rx_queues; i++) + priv->total_rx_ring_size += priv->rx_queue[i]->rx_ring_size; + + /* Allocate memory for the buffer descriptors */ + vaddr = dma_alloc_coherent(dev, + sizeof(struct txbd8) * priv->total_tx_ring_size + + sizeof(struct rxbd8) * priv->total_rx_ring_size, + &addr, GFP_KERNEL); + if (!vaddr) { + netif_err(priv, ifup, ndev, + "Could not allocate buffer descriptors!\n"); + return -ENOMEM; + } + + for (i = 0; i < priv->num_tx_queues; i++) { + tx_queue = priv->tx_queue[i]; + tx_queue->tx_bd_base = vaddr; + tx_queue->tx_bd_dma_base = addr; + tx_queue->dev = ndev; + /* enet DMA only understands physical addresses */ + addr += sizeof(struct txbd8) *tx_queue->tx_ring_size; + vaddr += sizeof(struct txbd8) *tx_queue->tx_ring_size; + } + + /* Start the rx descriptor ring where the tx ring leaves off */ + for (i = 0; i < priv->num_rx_queues; i++) { + rx_queue = priv->rx_queue[i]; + rx_queue->rx_bd_base = vaddr; + rx_queue->rx_bd_dma_base = addr; + rx_queue->dev = ndev; + addr += sizeof (struct rxbd8) * rx_queue->rx_ring_size; + vaddr += sizeof (struct rxbd8) * rx_queue->rx_ring_size; + } + + /* Setup the skbuff rings */ + for (i = 0; i < priv->num_tx_queues; i++) { + tx_queue = priv->tx_queue[i]; + tx_queue->tx_skbuff = kmalloc(sizeof(*tx_queue->tx_skbuff) * + tx_queue->tx_ring_size, GFP_KERNEL); + if (!tx_queue->tx_skbuff) { + netif_err(priv, ifup, ndev, + "Could not allocate tx_skbuff\n"); + goto cleanup; + } + + for (k = 0; k < tx_queue->tx_ring_size; k++) + tx_queue->tx_skbuff[k] = NULL; + } + + for (i = 0; i < priv->num_rx_queues; i++) { + rx_queue = priv->rx_queue[i]; + rx_queue->rx_skbuff = kmalloc(sizeof(*rx_queue->rx_skbuff) * + rx_queue->rx_ring_size, GFP_KERNEL); + + if (!rx_queue->rx_skbuff) { + netif_err(priv, ifup, ndev, + "Could not allocate rx_skbuff\n"); + goto cleanup; + } + + for (j = 0; j < rx_queue->rx_ring_size; j++) + rx_queue->rx_skbuff[j] = NULL; + } + + if (gfar_init_bds(ndev)) + goto cleanup; + + return 0; + +cleanup: + free_skb_resources(priv); + return -ENOMEM; +} + +static void gfar_init_tx_rx_base(struct gfar_private *priv) +{ + struct gfar __iomem *regs = priv->gfargrp[0].regs; + u32 __iomem *baddr; + int i; + + baddr = ®s->tbase0; + for(i = 0; i < priv->num_tx_queues; i++) { + gfar_write(baddr, priv->tx_queue[i]->tx_bd_dma_base); + baddr += 2; + } + + baddr = ®s->rbase0; + for(i = 0; i < priv->num_rx_queues; i++) { + gfar_write(baddr, priv->rx_queue[i]->rx_bd_dma_base); + baddr += 2; + } +} + +static void gfar_init_mac(struct net_device *ndev) +{ + struct gfar_private *priv = netdev_priv(ndev); + struct gfar __iomem *regs = priv->gfargrp[0].regs; + u32 rctrl = 0; + u32 tctrl = 0; + u32 attrs = 0; + + /* write the tx/rx base registers */ + gfar_init_tx_rx_base(priv); + + /* Configure the coalescing support */ + gfar_configure_coalescing(priv, 0xFF, 0xFF); + + if (priv->rx_filer_enable) { + rctrl |= RCTRL_FILREN; + /* Program the RIR0 reg with the required distribution */ + gfar_write(®s->rir0, DEFAULT_RIR0); + } + + if (ndev->features & NETIF_F_RXCSUM) + 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); + } + + /* Insert receive time stamps into padding alignment bytes */ + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) { + rctrl &= ~RCTRL_PAL_MASK; + rctrl |= RCTRL_PADDING(8); + priv->padding = 8; + } + + /* Enable HW time stamping if requested from user space */ + if (priv->hwts_rx_en) + rctrl |= RCTRL_PRSDEP_INIT | RCTRL_TS_ENABLE; + + if (ndev->features & NETIF_F_HW_VLAN_RX) + rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT; + + /* Init rctrl based on our settings */ + gfar_write(®s->rctrl, rctrl); + + if (ndev->features & NETIF_F_IP_CSUM) + tctrl |= TCTRL_INIT_CSUM; + + tctrl |= TCTRL_TXSCHED_PRIO; + + 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 struct net_device_stats *gfar_get_stats(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + unsigned long rx_packets = 0, rx_bytes = 0, rx_dropped = 0; + unsigned long tx_packets = 0, tx_bytes = 0; + int i = 0; + + for (i = 0; i < priv->num_rx_queues; i++) { + rx_packets += priv->rx_queue[i]->stats.rx_packets; + rx_bytes += priv->rx_queue[i]->stats.rx_bytes; + rx_dropped += priv->rx_queue[i]->stats.rx_dropped; + } + + dev->stats.rx_packets = rx_packets; + dev->stats.rx_bytes = rx_bytes; + dev->stats.rx_dropped = rx_dropped; + + for (i = 0; i < priv->num_tx_queues; i++) { + tx_bytes += priv->tx_queue[i]->stats.tx_bytes; + tx_packets += priv->tx_queue[i]->stats.tx_packets; + } + + dev->stats.tx_bytes = tx_bytes; + dev->stats.tx_packets = tx_packets; + + return &dev->stats; +} + +static const struct net_device_ops gfar_netdev_ops = { + .ndo_open = gfar_enet_open, + .ndo_start_xmit = gfar_start_xmit, + .ndo_stop = gfar_close, + .ndo_change_mtu = gfar_change_mtu, + .ndo_set_features = gfar_set_features, + .ndo_set_multicast_list = gfar_set_multi, + .ndo_tx_timeout = gfar_timeout, + .ndo_do_ioctl = gfar_ioctl, + .ndo_get_stats = gfar_get_stats, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +#ifdef CONFIG_NET_POLL_CONTROLLER + .ndo_poll_controller = gfar_netpoll, +#endif +}; + +void lock_rx_qs(struct gfar_private *priv) +{ + int i = 0x0; + + for (i = 0; i < priv->num_rx_queues; i++) + spin_lock(&priv->rx_queue[i]->rxlock); +} + +void lock_tx_qs(struct gfar_private *priv) +{ + int i = 0x0; + + for (i = 0; i < priv->num_tx_queues; i++) + spin_lock(&priv->tx_queue[i]->txlock); +} + +void unlock_rx_qs(struct gfar_private *priv) +{ + int i = 0x0; + + for (i = 0; i < priv->num_rx_queues; i++) + spin_unlock(&priv->rx_queue[i]->rxlock); +} + +void unlock_tx_qs(struct gfar_private *priv) +{ + int i = 0x0; + + for (i = 0; i < priv->num_tx_queues; i++) + spin_unlock(&priv->tx_queue[i]->txlock); +} + +static bool gfar_is_vlan_on(struct gfar_private *priv) +{ + return (priv->ndev->features & NETIF_F_HW_VLAN_RX) || + (priv->ndev->features & NETIF_F_HW_VLAN_TX); +} + +/* Returns 1 if incoming frames use an FCB */ +static inline int gfar_uses_fcb(struct gfar_private *priv) +{ + return gfar_is_vlan_on(priv) || + (priv->ndev->features & NETIF_F_RXCSUM) || + (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER); +} + +static void free_tx_pointers(struct gfar_private *priv) +{ + int i = 0; + + for (i = 0; i < priv->num_tx_queues; i++) + kfree(priv->tx_queue[i]); +} + +static void free_rx_pointers(struct gfar_private *priv) +{ + int i = 0; + + for (i = 0; i < priv->num_rx_queues; i++) + kfree(priv->rx_queue[i]); +} + +static void unmap_group_regs(struct gfar_private *priv) +{ + int i = 0; + + for (i = 0; i < MAXGROUPS; i++) + if (priv->gfargrp[i].regs) + iounmap(priv->gfargrp[i].regs); +} + +static void disable_napi(struct gfar_private *priv) +{ + int i = 0; + + for (i = 0; i < priv->num_grps; i++) + napi_disable(&priv->gfargrp[i].napi); +} + +static void enable_napi(struct gfar_private *priv) +{ + int i = 0; + + for (i = 0; i < priv->num_grps; i++) + napi_enable(&priv->gfargrp[i].napi); +} + +static int gfar_parse_group(struct device_node *np, + struct gfar_private *priv, const char *model) +{ + u32 *queue_mask; + + priv->gfargrp[priv->num_grps].regs = of_iomap(np, 0); + if (!priv->gfargrp[priv->num_grps].regs) + return -ENOMEM; + + priv->gfargrp[priv->num_grps].interruptTransmit = + irq_of_parse_and_map(np, 0); + + /* If we aren't the FEC we have multiple interrupts */ + if (model && strcasecmp(model, "FEC")) { + priv->gfargrp[priv->num_grps].interruptReceive = + irq_of_parse_and_map(np, 1); + priv->gfargrp[priv->num_grps].interruptError = + irq_of_parse_and_map(np,2); + if (priv->gfargrp[priv->num_grps].interruptTransmit == NO_IRQ || + priv->gfargrp[priv->num_grps].interruptReceive == NO_IRQ || + priv->gfargrp[priv->num_grps].interruptError == NO_IRQ) + return -EINVAL; + } + + priv->gfargrp[priv->num_grps].grp_id = priv->num_grps; + priv->gfargrp[priv->num_grps].priv = priv; + spin_lock_init(&priv->gfargrp[priv->num_grps].grplock); + if(priv->mode == MQ_MG_MODE) { + queue_mask = (u32 *)of_get_property(np, + "fsl,rx-bit-map", NULL); + priv->gfargrp[priv->num_grps].rx_bit_map = + queue_mask ? *queue_mask :(DEFAULT_MAPPING >> priv->num_grps); + queue_mask = (u32 *)of_get_property(np, + "fsl,tx-bit-map", NULL); + priv->gfargrp[priv->num_grps].tx_bit_map = + queue_mask ? *queue_mask : (DEFAULT_MAPPING >> priv->num_grps); + } else { + priv->gfargrp[priv->num_grps].rx_bit_map = 0xFF; + priv->gfargrp[priv->num_grps].tx_bit_map = 0xFF; + } + priv->num_grps++; + + return 0; +} + +static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev) +{ + const char *model; + const char *ctype; + const void *mac_addr; + int err = 0, i; + struct net_device *dev = NULL; + struct gfar_private *priv = NULL; + struct device_node *np = ofdev->dev.of_node; + struct device_node *child = NULL; + const u32 *stash; + const u32 *stash_len; + const u32 *stash_idx; + unsigned int num_tx_qs, num_rx_qs; + u32 *tx_queues, *rx_queues; + + if (!np || !of_device_is_available(np)) + return -ENODEV; + + /* parse the num of tx and rx queues */ + tx_queues = (u32 *)of_get_property(np, "fsl,num_tx_queues", NULL); + num_tx_qs = tx_queues ? *tx_queues : 1; + + if (num_tx_qs > MAX_TX_QS) { + pr_err("num_tx_qs(=%d) greater than MAX_TX_QS(=%d)\n", + num_tx_qs, MAX_TX_QS); + pr_err("Cannot do alloc_etherdev, aborting\n"); + return -EINVAL; + } + + rx_queues = (u32 *)of_get_property(np, "fsl,num_rx_queues", NULL); + num_rx_qs = rx_queues ? *rx_queues : 1; + + if (num_rx_qs > MAX_RX_QS) { + pr_err("num_rx_qs(=%d) greater than MAX_RX_QS(=%d)\n", + num_rx_qs, MAX_RX_QS); + pr_err("Cannot do alloc_etherdev, aborting\n"); + return -EINVAL; + } + + *pdev = alloc_etherdev_mq(sizeof(*priv), num_tx_qs); + dev = *pdev; + if (NULL == dev) + return -ENOMEM; + + priv = netdev_priv(dev); + priv->node = ofdev->dev.of_node; + priv->ndev = dev; + + priv->num_tx_queues = num_tx_qs; + netif_set_real_num_rx_queues(dev, num_rx_qs); + priv->num_rx_queues = num_rx_qs; + priv->num_grps = 0x0; + + /* Init Rx queue filer rule set linked list*/ + INIT_LIST_HEAD(&priv->rx_list.list); + priv->rx_list.count = 0; + mutex_init(&priv->rx_queue_access); + + model = of_get_property(np, "model", NULL); + + for (i = 0; i < MAXGROUPS; i++) + priv->gfargrp[i].regs = NULL; + + /* Parse and initialize group specific information */ + if (of_device_is_compatible(np, "fsl,etsec2")) { + priv->mode = MQ_MG_MODE; + for_each_child_of_node(np, child) { + err = gfar_parse_group(child, priv, model); + if (err) + goto err_grp_init; + } + } else { + priv->mode = SQ_SG_MODE; + err = gfar_parse_group(np, priv, model); + if(err) + goto err_grp_init; + } + + for (i = 0; i < priv->num_tx_queues; i++) + priv->tx_queue[i] = NULL; + for (i = 0; i < priv->num_rx_queues; i++) + priv->rx_queue[i] = NULL; + + for (i = 0; i < priv->num_tx_queues; i++) { + priv->tx_queue[i] = kzalloc(sizeof(struct gfar_priv_tx_q), + GFP_KERNEL); + if (!priv->tx_queue[i]) { + err = -ENOMEM; + goto tx_alloc_failed; + } + priv->tx_queue[i]->tx_skbuff = NULL; + priv->tx_queue[i]->qindex = i; + priv->tx_queue[i]->dev = dev; + spin_lock_init(&(priv->tx_queue[i]->txlock)); + } + + for (i = 0; i < priv->num_rx_queues; i++) { + priv->rx_queue[i] = kzalloc(sizeof(struct gfar_priv_rx_q), + GFP_KERNEL); + if (!priv->rx_queue[i]) { + err = -ENOMEM; + goto rx_alloc_failed; + } + priv->rx_queue[i]->rx_skbuff = NULL; + priv->rx_queue[i]->qindex = i; + priv->rx_queue[i]->dev = dev; + spin_lock_init(&(priv->rx_queue[i]->rxlock)); + } + + + stash = of_get_property(np, "bd-stash", NULL); + + if (stash) { + priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING; + priv->bd_stash_en = 1; + } + + stash_len = of_get_property(np, "rx-stash-len", NULL); + + if (stash_len) + priv->rx_stash_size = *stash_len; + + stash_idx = of_get_property(np, "rx-stash-idx", NULL); + + if (stash_idx) + priv->rx_stash_index = *stash_idx; + + if (stash_len || stash_idx) + priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING; + + mac_addr = of_get_mac_address(np); + if (mac_addr) + memcpy(dev->dev_addr, mac_addr, MAC_ADDR_LEN); + + if (model && !strcasecmp(model, "TSEC")) + priv->device_flags = + FSL_GIANFAR_DEV_HAS_GIGABIT | + FSL_GIANFAR_DEV_HAS_COALESCE | + FSL_GIANFAR_DEV_HAS_RMON | + FSL_GIANFAR_DEV_HAS_MULTI_INTR; + if (model && !strcasecmp(model, "eTSEC")) + priv->device_flags = + FSL_GIANFAR_DEV_HAS_GIGABIT | + FSL_GIANFAR_DEV_HAS_COALESCE | + FSL_GIANFAR_DEV_HAS_RMON | + FSL_GIANFAR_DEV_HAS_MULTI_INTR | + FSL_GIANFAR_DEV_HAS_PADDING | + FSL_GIANFAR_DEV_HAS_CSUM | + FSL_GIANFAR_DEV_HAS_VLAN | + FSL_GIANFAR_DEV_HAS_MAGIC_PACKET | + FSL_GIANFAR_DEV_HAS_EXTENDED_HASH | + FSL_GIANFAR_DEV_HAS_TIMER; + + ctype = of_get_property(np, "phy-connection-type", NULL); + + /* We only care about rgmii-id. The rest are autodetected */ + if (ctype && !strcmp(ctype, "rgmii-id")) + priv->interface = PHY_INTERFACE_MODE_RGMII_ID; + else + priv->interface = PHY_INTERFACE_MODE_MII; + + if (of_get_property(np, "fsl,magic-packet", NULL)) + priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET; + + priv->phy_node = of_parse_phandle(np, "phy-handle", 0); + + /* Find the TBI PHY. If it's not there, we don't support SGMII */ + priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0); + + return 0; + +rx_alloc_failed: + free_rx_pointers(priv); +tx_alloc_failed: + free_tx_pointers(priv); +err_grp_init: + unmap_group_regs(priv); + free_netdev(dev); + return err; +} + +static int gfar_hwtstamp_ioctl(struct net_device *netdev, + struct ifreq *ifr, int cmd) +{ + struct hwtstamp_config config; + struct gfar_private *priv = netdev_priv(netdev); + + if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) + return -EFAULT; + + /* reserved for future extensions */ + if (config.flags) + return -EINVAL; + + switch (config.tx_type) { + case HWTSTAMP_TX_OFF: + priv->hwts_tx_en = 0; + break; + case HWTSTAMP_TX_ON: + if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) + return -ERANGE; + priv->hwts_tx_en = 1; + break; + default: + return -ERANGE; + } + + switch (config.rx_filter) { + case HWTSTAMP_FILTER_NONE: + if (priv->hwts_rx_en) { + stop_gfar(netdev); + priv->hwts_rx_en = 0; + startup_gfar(netdev); + } + break; + default: + if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER)) + return -ERANGE; + if (!priv->hwts_rx_en) { + stop_gfar(netdev); + priv->hwts_rx_en = 1; + startup_gfar(netdev); + } + config.rx_filter = HWTSTAMP_FILTER_ALL; + break; + } + + return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? + -EFAULT : 0; +} + +/* Ioctl MII Interface */ +static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct gfar_private *priv = netdev_priv(dev); + + if (!netif_running(dev)) + return -EINVAL; + + if (cmd == SIOCSHWTSTAMP) + return gfar_hwtstamp_ioctl(dev, rq, cmd); + + if (!priv->phydev) + return -ENODEV; + + return phy_mii_ioctl(priv->phydev, rq, cmd); +} + +static unsigned int reverse_bitmap(unsigned int bit_map, unsigned int max_qs) +{ + unsigned int new_bit_map = 0x0; + int mask = 0x1 << (max_qs - 1), i; + for (i = 0; i < max_qs; i++) { + if (bit_map & mask) + new_bit_map = new_bit_map + (1 << i); + mask = mask >> 0x1; + } + return new_bit_map; +} + +static u32 cluster_entry_per_class(struct gfar_private *priv, u32 rqfar, + u32 class) +{ + u32 rqfpr = FPR_FILER_MASK; + u32 rqfcr = 0x0; + + rqfar--; + rqfcr = RQFCR_CLE | RQFCR_PID_MASK | RQFCR_CMP_EXACT; + priv->ftp_rqfpr[rqfar] = rqfpr; + priv->ftp_rqfcr[rqfar] = rqfcr; + gfar_write_filer(priv, rqfar, rqfcr, rqfpr); + + rqfar--; + rqfcr = RQFCR_CMP_NOMATCH; + priv->ftp_rqfpr[rqfar] = rqfpr; + priv->ftp_rqfcr[rqfar] = rqfcr; + gfar_write_filer(priv, rqfar, rqfcr, rqfpr); + + rqfar--; + rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND; + rqfpr = class; + priv->ftp_rqfcr[rqfar] = rqfcr; + priv->ftp_rqfpr[rqfar] = rqfpr; + gfar_write_filer(priv, rqfar, rqfcr, rqfpr); + + rqfar--; + rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_MASK | RQFCR_AND; + rqfpr = class; + priv->ftp_rqfcr[rqfar] = rqfcr; + priv->ftp_rqfpr[rqfar] = rqfpr; + gfar_write_filer(priv, rqfar, rqfcr, rqfpr); + + return rqfar; +} + +static void gfar_init_filer_table(struct gfar_private *priv) +{ + int i = 0x0; + u32 rqfar = MAX_FILER_IDX; + u32 rqfcr = 0x0; + u32 rqfpr = FPR_FILER_MASK; + + /* Default rule */ + rqfcr = RQFCR_CMP_MATCH; + priv->ftp_rqfcr[rqfar] = rqfcr; + priv->ftp_rqfpr[rqfar] = rqfpr; + gfar_write_filer(priv, rqfar, rqfcr, rqfpr); + + rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6); + rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_UDP); + rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_TCP); + rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4); + rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_UDP); + rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_TCP); + + /* cur_filer_idx indicated the first non-masked rule */ + priv->cur_filer_idx = rqfar; + + /* Rest are masked rules */ + rqfcr = RQFCR_CMP_NOMATCH; + for (i = 0; i < rqfar; i++) { + priv->ftp_rqfcr[i] = rqfcr; + priv->ftp_rqfpr[i] = rqfpr; + gfar_write_filer(priv, i, rqfcr, rqfpr); + } +} + +static void gfar_detect_errata(struct gfar_private *priv) +{ + struct device *dev = &priv->ofdev->dev; + unsigned int pvr = mfspr(SPRN_PVR); + unsigned int svr = mfspr(SPRN_SVR); + unsigned int mod = (svr >> 16) & 0xfff6; /* w/o E suffix */ + unsigned int rev = svr & 0xffff; + + /* MPC8313 Rev 2.0 and higher; All MPC837x */ + if ((pvr == 0x80850010 && mod == 0x80b0 && rev >= 0x0020) || + (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0)) + priv->errata |= GFAR_ERRATA_74; + + /* MPC8313 and MPC837x all rev */ + if ((pvr == 0x80850010 && mod == 0x80b0) || + (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0)) + priv->errata |= GFAR_ERRATA_76; + + /* MPC8313 and MPC837x all rev */ + if ((pvr == 0x80850010 && mod == 0x80b0) || + (pvr == 0x80861010 && (mod & 0xfff9) == 0x80c0)) + priv->errata |= GFAR_ERRATA_A002; + + /* MPC8313 Rev < 2.0, MPC8548 rev 2.0 */ + if ((pvr == 0x80850010 && mod == 0x80b0 && rev < 0x0020) || + (pvr == 0x80210020 && mod == 0x8030 && rev == 0x0020)) + priv->errata |= GFAR_ERRATA_12; + + if (priv->errata) + dev_info(dev, "enabled errata workarounds, flags: 0x%x\n", + priv->errata); +} + +/* Set up the ethernet device structure, private data, + * and anything else we need before we start */ +static int gfar_probe(struct platform_device *ofdev) +{ + u32 tempval; + struct net_device *dev = NULL; + struct gfar_private *priv = NULL; + struct gfar __iomem *regs = NULL; + int err = 0, i, grp_idx = 0; + int len_devname; + u32 rstat = 0, tstat = 0, rqueue = 0, tqueue = 0; + u32 isrg = 0; + u32 __iomem *baddr; + + err = gfar_of_init(ofdev, &dev); + + if (err) + return err; + + priv = netdev_priv(dev); + priv->ndev = dev; + priv->ofdev = ofdev; + priv->node = ofdev->dev.of_node; + SET_NETDEV_DEV(dev, &ofdev->dev); + + spin_lock_init(&priv->bflock); + INIT_WORK(&priv->reset_task, gfar_reset_task); + + dev_set_drvdata(&ofdev->dev, priv); + regs = priv->gfargrp[0].regs; + + gfar_detect_errata(priv); + + /* Stop the DMA engine now, in case it was running before */ + /* (The firmware could have used it, and left it running). */ + gfar_halt(dev); + + /* Reset MAC layer */ + gfar_write(®s->maccfg1, MACCFG1_SOFT_RESET); + + /* We need to delay at least 3 TX clocks */ + udelay(2); + + tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW); + gfar_write(®s->maccfg1, tempval); + + /* Initialize MACCFG2. */ + tempval = MACCFG2_INIT_SETTINGS; + if (gfar_has_errata(priv, GFAR_ERRATA_74)) + tempval |= MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK; + gfar_write(®s->maccfg2, tempval); + + /* Initialize ECNTRL */ + gfar_write(®s->ecntrl, ECNTRL_INIT_SETTINGS); + + /* Set the dev->base_addr to the gfar reg region */ + dev->base_addr = (unsigned long) regs; + + SET_NETDEV_DEV(dev, &ofdev->dev); + + /* Fill in the dev structure */ + dev->watchdog_timeo = TX_TIMEOUT; + dev->mtu = 1500; + dev->netdev_ops = &gfar_netdev_ops; + dev->ethtool_ops = &gfar_ethtool_ops; + + /* Register for napi ...We are registering NAPI for each grp */ + for (i = 0; i < priv->num_grps; i++) + netif_napi_add(dev, &priv->gfargrp[i].napi, gfar_poll, GFAR_DEV_WEIGHT); + + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) { + dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG | + NETIF_F_RXCSUM; + dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | + NETIF_F_RXCSUM | NETIF_F_HIGHDMA; + } + + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) { + dev->hw_features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; + dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; + } + + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) { + priv->extended_hash = 1; + priv->hash_width = 9; + + priv->hash_regs[0] = ®s->igaddr0; + priv->hash_regs[1] = ®s->igaddr1; + priv->hash_regs[2] = ®s->igaddr2; + priv->hash_regs[3] = ®s->igaddr3; + priv->hash_regs[4] = ®s->igaddr4; + priv->hash_regs[5] = ®s->igaddr5; + priv->hash_regs[6] = ®s->igaddr6; + priv->hash_regs[7] = ®s->igaddr7; + priv->hash_regs[8] = ®s->gaddr0; + priv->hash_regs[9] = ®s->gaddr1; + priv->hash_regs[10] = ®s->gaddr2; + priv->hash_regs[11] = ®s->gaddr3; + priv->hash_regs[12] = ®s->gaddr4; + priv->hash_regs[13] = ®s->gaddr5; + priv->hash_regs[14] = ®s->gaddr6; + priv->hash_regs[15] = ®s->gaddr7; + + } else { + priv->extended_hash = 0; + priv->hash_width = 8; + + priv->hash_regs[0] = ®s->gaddr0; + priv->hash_regs[1] = ®s->gaddr1; + priv->hash_regs[2] = ®s->gaddr2; + priv->hash_regs[3] = ®s->gaddr3; + priv->hash_regs[4] = ®s->gaddr4; + priv->hash_regs[5] = ®s->gaddr5; + priv->hash_regs[6] = ®s->gaddr6; + priv->hash_regs[7] = ®s->gaddr7; + } + + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_PADDING) + priv->padding = DEFAULT_PADDING; + else + priv->padding = 0; + + if (dev->features & NETIF_F_IP_CSUM || + priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) + dev->hard_header_len += GMAC_FCB_LEN; + + /* Program the isrg regs only if number of grps > 1 */ + if (priv->num_grps > 1) { + baddr = ®s->isrg0; + for (i = 0; i < priv->num_grps; i++) { + isrg |= (priv->gfargrp[i].rx_bit_map << ISRG_SHIFT_RX); + isrg |= (priv->gfargrp[i].tx_bit_map << ISRG_SHIFT_TX); + gfar_write(baddr, isrg); + baddr++; + isrg = 0x0; + } + } + + /* Need to reverse the bit maps as bit_map's MSB is q0 + * but, for_each_set_bit parses from right to left, which + * basically reverses the queue numbers */ + for (i = 0; i< priv->num_grps; i++) { + priv->gfargrp[i].tx_bit_map = reverse_bitmap( + priv->gfargrp[i].tx_bit_map, MAX_TX_QS); + priv->gfargrp[i].rx_bit_map = reverse_bitmap( + priv->gfargrp[i].rx_bit_map, MAX_RX_QS); + } + + /* Calculate RSTAT, TSTAT, RQUEUE and TQUEUE values, + * also assign queues to groups */ + for (grp_idx = 0; grp_idx < priv->num_grps; grp_idx++) { + priv->gfargrp[grp_idx].num_rx_queues = 0x0; + for_each_set_bit(i, &priv->gfargrp[grp_idx].rx_bit_map, + priv->num_rx_queues) { + priv->gfargrp[grp_idx].num_rx_queues++; + priv->rx_queue[i]->grp = &priv->gfargrp[grp_idx]; + rstat = rstat | (RSTAT_CLEAR_RHALT >> i); + rqueue = rqueue | ((RQUEUE_EN0 | RQUEUE_EX0) >> i); + } + priv->gfargrp[grp_idx].num_tx_queues = 0x0; + for_each_set_bit(i, &priv->gfargrp[grp_idx].tx_bit_map, + priv->num_tx_queues) { + priv->gfargrp[grp_idx].num_tx_queues++; + priv->tx_queue[i]->grp = &priv->gfargrp[grp_idx]; + tstat = tstat | (TSTAT_CLEAR_THALT >> i); + tqueue = tqueue | (TQUEUE_EN0 >> i); + } + priv->gfargrp[grp_idx].rstat = rstat; + priv->gfargrp[grp_idx].tstat = tstat; + rstat = tstat =0; + } + + gfar_write(®s->rqueue, rqueue); + gfar_write(®s->tqueue, tqueue); + + priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE; + + /* Initializing some of the rx/tx queue level parameters */ + for (i = 0; i < priv->num_tx_queues; i++) { + priv->tx_queue[i]->tx_ring_size = DEFAULT_TX_RING_SIZE; + priv->tx_queue[i]->num_txbdfree = DEFAULT_TX_RING_SIZE; + priv->tx_queue[i]->txcoalescing = DEFAULT_TX_COALESCE; + priv->tx_queue[i]->txic = DEFAULT_TXIC; + } + + for (i = 0; i < priv->num_rx_queues; i++) { + priv->rx_queue[i]->rx_ring_size = DEFAULT_RX_RING_SIZE; + priv->rx_queue[i]->rxcoalescing = DEFAULT_RX_COALESCE; + priv->rx_queue[i]->rxic = DEFAULT_RXIC; + } + + /* always enable rx filer*/ + priv->rx_filer_enable = 1; + /* Enable most messages by default */ + priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1; + + /* Carrier starts down, phylib will bring it up */ + netif_carrier_off(dev); + + err = register_netdev(dev); + + if (err) { + pr_err("%s: Cannot register net device, aborting\n", dev->name); + goto register_fail; + } + + device_init_wakeup(&dev->dev, + priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); + + /* fill out IRQ number and name fields */ + len_devname = strlen(dev->name); + for (i = 0; i < priv->num_grps; i++) { + strncpy(&priv->gfargrp[i].int_name_tx[0], dev->name, + len_devname); + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { + strncpy(&priv->gfargrp[i].int_name_tx[len_devname], + "_g", sizeof("_g")); + priv->gfargrp[i].int_name_tx[ + strlen(priv->gfargrp[i].int_name_tx)] = i+48; + strncpy(&priv->gfargrp[i].int_name_tx[strlen( + priv->gfargrp[i].int_name_tx)], + "_tx", sizeof("_tx") + 1); + + strncpy(&priv->gfargrp[i].int_name_rx[0], dev->name, + len_devname); + strncpy(&priv->gfargrp[i].int_name_rx[len_devname], + "_g", sizeof("_g")); + priv->gfargrp[i].int_name_rx[ + strlen(priv->gfargrp[i].int_name_rx)] = i+48; + strncpy(&priv->gfargrp[i].int_name_rx[strlen( + priv->gfargrp[i].int_name_rx)], + "_rx", sizeof("_rx") + 1); + + strncpy(&priv->gfargrp[i].int_name_er[0], dev->name, + len_devname); + strncpy(&priv->gfargrp[i].int_name_er[len_devname], + "_g", sizeof("_g")); + priv->gfargrp[i].int_name_er[strlen( + priv->gfargrp[i].int_name_er)] = i+48; + strncpy(&priv->gfargrp[i].int_name_er[strlen(\ + priv->gfargrp[i].int_name_er)], + "_er", sizeof("_er") + 1); + } else + priv->gfargrp[i].int_name_tx[len_devname] = '\0'; + } + + /* Initialize the filer table */ + gfar_init_filer_table(priv); + + /* Create all the sysfs files */ + gfar_init_sysfs(dev); + + /* Print out the device info */ + netdev_info(dev, "mac: %pM\n", dev->dev_addr); + + /* Even more device info helps when determining which kernel */ + /* provided which set of benchmarks. */ + netdev_info(dev, "Running with NAPI enabled\n"); + for (i = 0; i < priv->num_rx_queues; i++) + netdev_info(dev, "RX BD ring size for Q[%d]: %d\n", + i, priv->rx_queue[i]->rx_ring_size); + for(i = 0; i < priv->num_tx_queues; i++) + netdev_info(dev, "TX BD ring size for Q[%d]: %d\n", + i, priv->tx_queue[i]->tx_ring_size); + + return 0; + +register_fail: + unmap_group_regs(priv); + free_tx_pointers(priv); + free_rx_pointers(priv); + if (priv->phy_node) + of_node_put(priv->phy_node); + if (priv->tbi_node) + of_node_put(priv->tbi_node); + free_netdev(dev); + return err; +} + +static int gfar_remove(struct platform_device *ofdev) +{ + struct gfar_private *priv = dev_get_drvdata(&ofdev->dev); + + if (priv->phy_node) + of_node_put(priv->phy_node); + if (priv->tbi_node) + of_node_put(priv->tbi_node); + + dev_set_drvdata(&ofdev->dev, NULL); + + unregister_netdev(priv->ndev); + unmap_group_regs(priv); + free_netdev(priv->ndev); + + return 0; +} + +#ifdef CONFIG_PM + +static int gfar_suspend(struct device *dev) +{ + struct gfar_private *priv = dev_get_drvdata(dev); + struct net_device *ndev = priv->ndev; + struct gfar __iomem *regs = priv->gfargrp[0].regs; + unsigned long flags; + u32 tempval; + + int magic_packet = priv->wol_en && + (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); + + netif_device_detach(ndev); + + if (netif_running(ndev)) { + + local_irq_save(flags); + lock_tx_qs(priv); + lock_rx_qs(priv); + + gfar_halt_nodisable(ndev); + + /* Disable Tx, and Rx if wake-on-LAN is disabled. */ + tempval = gfar_read(®s->maccfg1); + + tempval &= ~MACCFG1_TX_EN; + + if (!magic_packet) + tempval &= ~MACCFG1_RX_EN; + + gfar_write(®s->maccfg1, tempval); + + unlock_rx_qs(priv); + unlock_tx_qs(priv); + local_irq_restore(flags); + + disable_napi(priv); + + if (magic_packet) { + /* Enable interrupt on Magic Packet */ + gfar_write(®s->imask, IMASK_MAG); + + /* Enable Magic Packet mode */ + tempval = gfar_read(®s->maccfg2); + tempval |= MACCFG2_MPEN; + gfar_write(®s->maccfg2, tempval); + } else { + phy_stop(priv->phydev); + } + } + + return 0; +} + +static int gfar_resume(struct device *dev) +{ + struct gfar_private *priv = dev_get_drvdata(dev); + struct net_device *ndev = priv->ndev; + struct gfar __iomem *regs = priv->gfargrp[0].regs; + unsigned long flags; + u32 tempval; + int magic_packet = priv->wol_en && + (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET); + + if (!netif_running(ndev)) { + netif_device_attach(ndev); + return 0; + } + + if (!magic_packet && priv->phydev) + phy_start(priv->phydev); + + /* Disable Magic Packet mode, in case something + * else woke us up. + */ + local_irq_save(flags); + lock_tx_qs(priv); + lock_rx_qs(priv); + + tempval = gfar_read(®s->maccfg2); + tempval &= ~MACCFG2_MPEN; + gfar_write(®s->maccfg2, tempval); + + gfar_start(ndev); + + unlock_rx_qs(priv); + unlock_tx_qs(priv); + local_irq_restore(flags); + + netif_device_attach(ndev); + + enable_napi(priv); + + 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); + enable_napi(priv); + + 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) + +#else + +#define GFAR_PM_OPS NULL + +#endif + +/* 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); + struct gfar __iomem *regs = priv->gfargrp[0].regs; + u32 ecntrl; + + ecntrl = gfar_read(®s->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->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->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->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ? + SUPPORTED_1000baseT_Full : 0; + phy_interface_t interface; + + priv->oldlink = 0; + priv->oldspeed = 0; + priv->oldduplex = -1; + + interface = gfar_get_interface(dev); + + priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0, + interface); + if (!priv->phydev) + priv->phydev = of_phy_connect_fixed_link(dev, &adjust_link, + interface); + if (!priv->phydev) { + dev_err(&dev->dev, "could not attach to PHY\n"); + return -ENODEV; + } + + if (interface == PHY_INTERFACE_MODE_SGMII) + gfar_configure_serdes(dev); + + /* Remove any features not supported by the controller */ + priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support); + priv->phydev->advertising = priv->phydev->supported; + + return 0; +} + +/* + * Initialize TBI PHY interface for communicating with the + * SERDES lynx PHY on the chip. We communicate with this PHY + * through the MDIO bus on each controller, treating it as a + * "normal" PHY at the address found in the TBIPA register. We assume + * that the TBIPA register is valid. Either the MDIO bus code will set + * it to a value that doesn't conflict with other PHYs on the bus, or the + * value doesn't matter, as there are no other PHYs on the bus. + */ +static void gfar_configure_serdes(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + struct phy_device *tbiphy; + + if (!priv->tbi_node) { + dev_warn(&dev->dev, "error: SGMII mode requires that the " + "device tree specify a tbi-handle\n"); + return; + } + + tbiphy = of_phy_find_device(priv->tbi_node); + if (!tbiphy) { + dev_err(&dev->dev, "error: Could not get TBI device\n"); + return; + } + + /* + * If the link is already up, we must already be ok, and don't need to + * configure and reset the TBI<->SerDes link. Maybe U-Boot configured + * everything for us? Resetting it takes the link down and requires + * several seconds for it to come back. + */ + if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS) + return; + + /* Single clk mode, mii mode off(for serdes communication) */ + phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT); + + phy_write(tbiphy, MII_ADVERTISE, + ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE | + ADVERTISE_1000XPSE_ASYM); + + phy_write(tbiphy, 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); + struct gfar __iomem *regs = NULL; + int i = 0; + + for (i = 0; i < priv->num_grps; i++) { + regs = priv->gfargrp[i].regs; + /* Clear IEVENT */ + gfar_write(®s->ievent, IEVENT_INIT_CLEAR); + + /* Initialize IMASK */ + gfar_write(®s->imask, IMASK_INIT_CLEAR); + } + + regs = priv->gfargrp[0].regs; + /* Init hash registers to zero */ + gfar_write(®s->igaddr0, 0); + gfar_write(®s->igaddr1, 0); + gfar_write(®s->igaddr2, 0); + gfar_write(®s->igaddr3, 0); + gfar_write(®s->igaddr4, 0); + gfar_write(®s->igaddr5, 0); + gfar_write(®s->igaddr6, 0); + gfar_write(®s->igaddr7, 0); + + gfar_write(®s->gaddr0, 0); + gfar_write(®s->gaddr1, 0); + gfar_write(®s->gaddr2, 0); + gfar_write(®s->gaddr3, 0); + gfar_write(®s->gaddr4, 0); + gfar_write(®s->gaddr5, 0); + gfar_write(®s->gaddr6, 0); + gfar_write(®s->gaddr7, 0); + + /* Zero out the rmon mib registers if it has them */ + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) { + memset_io(&(regs->rmon), 0, sizeof (struct rmon_mib)); + + /* Mask off the CAM interrupts */ + gfar_write(®s->rmon.cam1, 0xffffffff); + gfar_write(®s->rmon.cam2, 0xffffffff); + } + + /* Initialize the max receive buffer length */ + gfar_write(®s->mrblr, priv->rx_buffer_size); + + /* Initialize the Minimum Frame Length Register */ + gfar_write(®s->minflr, MINFLR_INIT_SETTINGS); +} + +static int __gfar_is_rx_idle(struct gfar_private *priv) +{ + u32 res; + + /* + * Normaly TSEC should not hang on GRS commands, so we should + * actually wait for IEVENT_GRSC flag. + */ + if (likely(!gfar_has_errata(priv, GFAR_ERRATA_A002))) + return 0; + + /* + * Read the eTSEC register at offset 0xD1C. If bits 7-14 are + * the same as bits 23-30, the eTSEC Rx is assumed to be idle + * and the Rx can be safely reset. + */ + res = gfar_read((void __iomem *)priv->gfargrp[0].regs + 0xd1c); + res &= 0x7f807f80; + if ((res & 0xffff) == (res >> 16)) + return 1; + + return 0; +} + +/* Halt the receive and transmit queues */ +static void gfar_halt_nodisable(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + struct gfar __iomem *regs = NULL; + u32 tempval; + int i = 0; + + for (i = 0; i < priv->num_grps; i++) { + regs = priv->gfargrp[i].regs; + /* Mask all interrupts */ + gfar_write(®s->imask, IMASK_INIT_CLEAR); + + /* Clear all interrupts */ + gfar_write(®s->ievent, IEVENT_INIT_CLEAR); + } + + regs = priv->gfargrp[0].regs; + /* Stop the DMA, and wait for it to stop */ + tempval = gfar_read(®s->dmactrl); + if ((tempval & (DMACTRL_GRS | DMACTRL_GTS)) + != (DMACTRL_GRS | DMACTRL_GTS)) { + int ret; + + tempval |= (DMACTRL_GRS | DMACTRL_GTS); + gfar_write(®s->dmactrl, tempval); + + do { + ret = spin_event_timeout(((gfar_read(®s->ievent) & + (IEVENT_GRSC | IEVENT_GTSC)) == + (IEVENT_GRSC | IEVENT_GTSC)), 1000000, 0); + if (!ret && !(gfar_read(®s->ievent) & IEVENT_GRSC)) + ret = __gfar_is_rx_idle(priv); + } while (!ret); + } +} + +/* 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->gfargrp[0].regs; + u32 tempval; + + gfar_halt_nodisable(dev); + + /* Disable Rx and Tx */ + tempval = gfar_read(®s->maccfg1); + tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN); + gfar_write(®s->maccfg1, tempval); +} + +static void free_grp_irqs(struct gfar_priv_grp *grp) +{ + free_irq(grp->interruptError, grp); + free_irq(grp->interruptTransmit, grp); + free_irq(grp->interruptReceive, grp); +} + +void stop_gfar(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + unsigned long flags; + int i; + + phy_stop(priv->phydev); + + + /* Lock it down */ + local_irq_save(flags); + lock_tx_qs(priv); + lock_rx_qs(priv); + + gfar_halt(dev); + + unlock_rx_qs(priv); + unlock_tx_qs(priv); + local_irq_restore(flags); + + /* Free the IRQs */ + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { + for (i = 0; i < priv->num_grps; i++) + free_grp_irqs(&priv->gfargrp[i]); + } else { + for (i = 0; i < priv->num_grps; i++) + free_irq(priv->gfargrp[i].interruptTransmit, + &priv->gfargrp[i]); + } + + free_skb_resources(priv); +} + +static void free_skb_tx_queue(struct gfar_priv_tx_q *tx_queue) +{ + struct txbd8 *txbdp; + struct gfar_private *priv = netdev_priv(tx_queue->dev); + int i, j; + + txbdp = tx_queue->tx_bd_base; + + for (i = 0; i < tx_queue->tx_ring_size; i++) { + if (!tx_queue->tx_skbuff[i]) + continue; + + dma_unmap_single(&priv->ofdev->dev, txbdp->bufPtr, + txbdp->length, DMA_TO_DEVICE); + txbdp->lstatus = 0; + for (j = 0; j < skb_shinfo(tx_queue->tx_skbuff[i])->nr_frags; + j++) { + txbdp++; + dma_unmap_page(&priv->ofdev->dev, txbdp->bufPtr, + txbdp->length, DMA_TO_DEVICE); + } + txbdp++; + dev_kfree_skb_any(tx_queue->tx_skbuff[i]); + tx_queue->tx_skbuff[i] = NULL; + } + kfree(tx_queue->tx_skbuff); +} + +static void free_skb_rx_queue(struct gfar_priv_rx_q *rx_queue) +{ + struct rxbd8 *rxbdp; + struct gfar_private *priv = netdev_priv(rx_queue->dev); + int i; + + rxbdp = rx_queue->rx_bd_base; + + for (i = 0; i < rx_queue->rx_ring_size; i++) { + if (rx_queue->rx_skbuff[i]) { + dma_unmap_single(&priv->ofdev->dev, + rxbdp->bufPtr, priv->rx_buffer_size, + DMA_FROM_DEVICE); + dev_kfree_skb_any(rx_queue->rx_skbuff[i]); + rx_queue->rx_skbuff[i] = NULL; + } + rxbdp->lstatus = 0; + rxbdp->bufPtr = 0; + rxbdp++; + } + kfree(rx_queue->rx_skbuff); +} + +/* 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 gfar_priv_tx_q *tx_queue = NULL; + struct gfar_priv_rx_q *rx_queue = NULL; + int i; + + /* Go through all the buffer descriptors and free their data buffers */ + for (i = 0; i < priv->num_tx_queues; i++) { + tx_queue = priv->tx_queue[i]; + if(tx_queue->tx_skbuff) + free_skb_tx_queue(tx_queue); + } + + for (i = 0; i < priv->num_rx_queues; i++) { + rx_queue = priv->rx_queue[i]; + if(rx_queue->rx_skbuff) + free_skb_rx_queue(rx_queue); + } + + dma_free_coherent(&priv->ofdev->dev, + sizeof(struct txbd8) * priv->total_tx_ring_size + + sizeof(struct rxbd8) * priv->total_rx_ring_size, + priv->tx_queue[0]->tx_bd_base, + priv->tx_queue[0]->tx_bd_dma_base); + skb_queue_purge(&priv->rx_recycle); +} + +void gfar_start(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + struct gfar __iomem *regs = priv->gfargrp[0].regs; + u32 tempval; + int i = 0; + + /* 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(®s->dmactrl); + tempval |= DMACTRL_INIT_SETTINGS; + gfar_write(®s->dmactrl, tempval); + + /* Make sure we aren't stopped */ + tempval = gfar_read(®s->dmactrl); + tempval &= ~(DMACTRL_GRS | DMACTRL_GTS); + gfar_write(®s->dmactrl, tempval); + + for (i = 0; i < priv->num_grps; i++) { + regs = priv->gfargrp[i].regs; + /* Clear THLT/RHLT, so that the DMA starts polling now */ + gfar_write(®s->tstat, priv->gfargrp[i].tstat); + gfar_write(®s->rstat, priv->gfargrp[i].rstat); + /* Unmask the interrupts we look for */ + gfar_write(®s->imask, IMASK_DEFAULT); + } + + dev->trans_start = jiffies; /* prevent tx timeout */ +} + +void gfar_configure_coalescing(struct gfar_private *priv, + unsigned long tx_mask, unsigned long rx_mask) +{ + struct gfar __iomem *regs = priv->gfargrp[0].regs; + u32 __iomem *baddr; + int i = 0; + + /* Backward compatible case ---- even if we enable + * multiple queues, there's only single reg to program + */ + gfar_write(®s->txic, 0); + if(likely(priv->tx_queue[0]->txcoalescing)) + gfar_write(®s->txic, priv->tx_queue[0]->txic); + + gfar_write(®s->rxic, 0); + if(unlikely(priv->rx_queue[0]->rxcoalescing)) + gfar_write(®s->rxic, priv->rx_queue[0]->rxic); + + if (priv->mode == MQ_MG_MODE) { + baddr = ®s->txic0; + for_each_set_bit(i, &tx_mask, priv->num_tx_queues) { + if (likely(priv->tx_queue[i]->txcoalescing)) { + gfar_write(baddr + i, 0); + gfar_write(baddr + i, priv->tx_queue[i]->txic); + } + } + + baddr = ®s->rxic0; + for_each_set_bit(i, &rx_mask, priv->num_rx_queues) { + if (likely(priv->rx_queue[i]->rxcoalescing)) { + gfar_write(baddr + i, 0); + gfar_write(baddr + i, priv->rx_queue[i]->rxic); + } + } + } +} + +static int register_grp_irqs(struct gfar_priv_grp *grp) +{ + struct gfar_private *priv = grp->priv; + struct net_device *dev = priv->ndev; + int err; + + /* 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 ((err = request_irq(grp->interruptError, gfar_error, 0, + grp->int_name_er,grp)) < 0) { + netif_err(priv, intr, dev, "Can't get IRQ %d\n", + grp->interruptError); + + goto err_irq_fail; + } + + if ((err = request_irq(grp->interruptTransmit, gfar_transmit, + 0, grp->int_name_tx, grp)) < 0) { + netif_err(priv, intr, dev, "Can't get IRQ %d\n", + grp->interruptTransmit); + goto tx_irq_fail; + } + + if ((err = request_irq(grp->interruptReceive, gfar_receive, 0, + grp->int_name_rx, grp)) < 0) { + netif_err(priv, intr, dev, "Can't get IRQ %d\n", + grp->interruptReceive); + goto rx_irq_fail; + } + } else { + if ((err = request_irq(grp->interruptTransmit, gfar_interrupt, 0, + grp->int_name_tx, grp)) < 0) { + netif_err(priv, intr, dev, "Can't get IRQ %d\n", + grp->interruptTransmit); + goto err_irq_fail; + } + } + + return 0; + +rx_irq_fail: + free_irq(grp->interruptTransmit, grp); +tx_irq_fail: + free_irq(grp->interruptError, grp); +err_irq_fail: + return err; + +} + +/* Bring the controller up and running */ +int startup_gfar(struct net_device *ndev) +{ + struct gfar_private *priv = netdev_priv(ndev); + struct gfar __iomem *regs = NULL; + int err, i, j; + + for (i = 0; i < priv->num_grps; i++) { + regs= priv->gfargrp[i].regs; + gfar_write(®s->imask, IMASK_INIT_CLEAR); + } + + regs= priv->gfargrp[0].regs; + err = gfar_alloc_skb_resources(ndev); + if (err) + return err; + + gfar_init_mac(ndev); + + for (i = 0; i < priv->num_grps; i++) { + err = register_grp_irqs(&priv->gfargrp[i]); + if (err) { + for (j = 0; j < i; j++) + free_grp_irqs(&priv->gfargrp[j]); + goto irq_fail; + } + } + + /* Start the controller */ + gfar_start(ndev); + + phy_start(priv->phydev); + + gfar_configure_coalescing(priv, 0xFF, 0xFF); + + return 0; + +irq_fail: + free_skb_resources(priv); + return err; +} + +/* Called when something needs to use the ethernet device */ +/* Returns 0 for success. */ +static int gfar_enet_open(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + int err; + + enable_napi(priv); + + skb_queue_head_init(&priv->rx_recycle); + + /* Initialize a bunch of registers */ + init_registers(dev); + + gfar_set_mac_address(dev); + + err = init_phy(dev); + + if (err) { + disable_napi(priv); + return err; + } + + err = startup_gfar(dev); + if (err) { + disable_napi(priv); + return err; + } + + netif_tx_start_all_queues(dev); + + device_set_wakeup_enable(&dev->dev, priv->wol_en); + + return err; +} + +static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb) +{ + 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); +} + +static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride, + struct txbd8 *base, int ring_size) +{ + struct txbd8 *new_bd = bdp + stride; + + return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd; +} + +static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base, + int ring_size) +{ + return skip_txbd(bdp, 1, base, ring_size); +} + +/* 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 gfar_priv_tx_q *tx_queue = NULL; + struct netdev_queue *txq; + struct gfar __iomem *regs = NULL; + struct txfcb *fcb = NULL; + struct txbd8 *txbdp, *txbdp_start, *base, *txbdp_tstamp = NULL; + u32 lstatus; + int i, rq = 0, do_tstamp = 0; + u32 bufaddr; + unsigned long flags; + unsigned int nr_frags, nr_txbds, length; + + /* + * TOE=1 frames larger than 2500 bytes may see excess delays + * before start of transmission. + */ + if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_76) && + skb->ip_summed == CHECKSUM_PARTIAL && + skb->len > 2500)) { + int ret; + + ret = skb_checksum_help(skb); + if (ret) + return ret; + } + + rq = skb->queue_mapping; + tx_queue = priv->tx_queue[rq]; + txq = netdev_get_tx_queue(dev, rq); + base = tx_queue->tx_bd_base; + regs = tx_queue->grp->regs; + + /* check if time stamp should be generated */ + if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && + priv->hwts_tx_en)) + do_tstamp = 1; + + /* make space for additional header when fcb is needed */ + if (((skb->ip_summed == CHECKSUM_PARTIAL) || + vlan_tx_tag_present(skb) || + unlikely(do_tstamp)) && + (skb_headroom(skb) < GMAC_FCB_LEN)) { + struct sk_buff *skb_new; + + skb_new = skb_realloc_headroom(skb, GMAC_FCB_LEN); + if (!skb_new) { + dev->stats.tx_errors++; + kfree_skb(skb); + return NETDEV_TX_OK; + } + kfree_skb(skb); + skb = skb_new; + } + + /* total number of fragments in the SKB */ + nr_frags = skb_shinfo(skb)->nr_frags; + + /* calculate the required number of TxBDs for this skb */ + if (unlikely(do_tstamp)) + nr_txbds = nr_frags + 2; + else + nr_txbds = nr_frags + 1; + + /* check if there is space to queue this packet */ + if (nr_txbds > tx_queue->num_txbdfree) { + /* no space, stop the queue */ + netif_tx_stop_queue(txq); + dev->stats.tx_fifo_errors++; + return NETDEV_TX_BUSY; + } + + /* Update transmit stats */ + tx_queue->stats.tx_bytes += skb->len; + tx_queue->stats.tx_packets++; + + txbdp = txbdp_start = tx_queue->cur_tx; + lstatus = txbdp->lstatus; + + /* Time stamp insertion requires one additional TxBD */ + if (unlikely(do_tstamp)) + txbdp_tstamp = txbdp = next_txbd(txbdp, base, + tx_queue->tx_ring_size); + + if (nr_frags == 0) { + if (unlikely(do_tstamp)) + txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_LAST | + TXBD_INTERRUPT); + else + lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT); + } else { + /* Place the fragment addresses and lengths into the TxBDs */ + for (i = 0; i < nr_frags; i++) { + /* Point at the next BD, wrapping as needed */ + txbdp = next_txbd(txbdp, base, tx_queue->tx_ring_size); + + length = skb_shinfo(skb)->frags[i].size; + + lstatus = txbdp->lstatus | length | + BD_LFLAG(TXBD_READY); + + /* Handle the last BD specially */ + if (i == nr_frags - 1) + lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT); + + bufaddr = dma_map_page(&priv->ofdev->dev, + skb_shinfo(skb)->frags[i].page, + skb_shinfo(skb)->frags[i].page_offset, + length, + DMA_TO_DEVICE); + + /* set the TxBD length and buffer pointer */ + txbdp->bufPtr = bufaddr; + txbdp->lstatus = lstatus; + } + + lstatus = txbdp_start->lstatus; + } + + /* Set up checksumming */ + if (CHECKSUM_PARTIAL == skb->ip_summed) { + fcb = gfar_add_fcb(skb); + /* as specified by errata */ + if (unlikely(gfar_has_errata(priv, GFAR_ERRATA_12) + && ((unsigned long)fcb % 0x20) > 0x18)) { + __skb_pull(skb, GMAC_FCB_LEN); + skb_checksum_help(skb); + } else { + lstatus |= BD_LFLAG(TXBD_TOE); + gfar_tx_checksum(skb, fcb); + } + } + + if (vlan_tx_tag_present(skb)) { + if (unlikely(NULL == fcb)) { + fcb = gfar_add_fcb(skb); + lstatus |= BD_LFLAG(TXBD_TOE); + } + + gfar_tx_vlan(skb, fcb); + } + + /* Setup tx hardware time stamping if requested */ + if (unlikely(do_tstamp)) { + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + if (fcb == NULL) + fcb = gfar_add_fcb(skb); + fcb->ptp = 1; + lstatus |= BD_LFLAG(TXBD_TOE); + } + + txbdp_start->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data, + skb_headlen(skb), DMA_TO_DEVICE); + + /* + * If time stamping is requested one additional TxBD must be set up. The + * first TxBD points to the FCB and must have a data length of + * GMAC_FCB_LEN. The second TxBD points to the actual frame data with + * the full frame length. + */ + if (unlikely(do_tstamp)) { + txbdp_tstamp->bufPtr = txbdp_start->bufPtr + GMAC_FCB_LEN; + txbdp_tstamp->lstatus |= BD_LFLAG(TXBD_READY) | + (skb_headlen(skb) - GMAC_FCB_LEN); + lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | GMAC_FCB_LEN; + } else { + lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb); + } + + /* + * We can work in parallel with gfar_clean_tx_ring(), except + * when modifying num_txbdfree. Note that we didn't grab the lock + * when we were reading the num_txbdfree and checking for available + * space, that's because outside of this function it can only grow, + * and once we've got needed space, it cannot suddenly disappear. + * + * The lock also protects us from gfar_error(), which can modify + * regs->tstat and thus retrigger the transfers, which is why we + * also must grab the lock before setting ready bit for the first + * to be transmitted BD. + */ + spin_lock_irqsave(&tx_queue->txlock, flags); + + /* + * 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_start->lstatus = lstatus; + + eieio(); /* force lstatus write before tx_skbuff */ + + tx_queue->tx_skbuff[tx_queue->skb_curtx] = skb; + + /* Update the current skb pointer to the next entry we will use + * (wrapping if necessary) */ + tx_queue->skb_curtx = (tx_queue->skb_curtx + 1) & + TX_RING_MOD_MASK(tx_queue->tx_ring_size); + + tx_queue->cur_tx = next_txbd(txbdp, base, tx_queue->tx_ring_size); + + /* reduce TxBD free count */ + tx_queue->num_txbdfree -= (nr_txbds); + + /* 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 (!tx_queue->num_txbdfree) { + netif_tx_stop_queue(txq); + + dev->stats.tx_fifo_errors++; + } + + /* Tell the DMA to go go go */ + gfar_write(®s->tstat, TSTAT_CLEAR_THALT >> tx_queue->qindex); + + /* Unlock priv */ + spin_unlock_irqrestore(&tx_queue->txlock, flags); + + return NETDEV_TX_OK; +} + +/* Stops the kernel queue, and halts the controller */ +static int gfar_close(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + + disable_napi(priv); + + cancel_work_sync(&priv->reset_task); + stop_gfar(dev); + + /* Disconnect from the PHY */ + phy_disconnect(priv->phydev); + priv->phydev = NULL; + + netif_tx_stop_all_queues(dev); + + return 0; +} + +/* Changes the mac address if the controller is not running. */ +static int gfar_set_mac_address(struct net_device *dev) +{ + gfar_set_mac_for_addr(dev, 0, dev->dev_addr); + + return 0; +} + +/* Check if rx parser should be activated */ +void gfar_check_rx_parser_mode(struct gfar_private *priv) +{ + struct gfar __iomem *regs; + u32 tempval; + + regs = priv->gfargrp[0].regs; + + tempval = gfar_read(®s->rctrl); + /* If parse is no longer required, then disable parser */ + if (tempval & RCTRL_REQ_PARSER) + tempval |= RCTRL_PRSDEP_INIT; + else + tempval &= ~RCTRL_PRSDEP_INIT; + gfar_write(®s->rctrl, tempval); +} + +/* Enables and disables VLAN insertion/extraction */ +void gfar_vlan_mode(struct net_device *dev, u32 features) +{ + struct gfar_private *priv = netdev_priv(dev); + struct gfar __iomem *regs = NULL; + unsigned long flags; + u32 tempval; + + regs = priv->gfargrp[0].regs; + local_irq_save(flags); + lock_rx_qs(priv); + + if (features & NETIF_F_HW_VLAN_TX) { + /* Enable VLAN tag insertion */ + tempval = gfar_read(®s->tctrl); + tempval |= TCTRL_VLINS; + gfar_write(®s->tctrl, tempval); + } else { + /* Disable VLAN tag insertion */ + tempval = gfar_read(®s->tctrl); + tempval &= ~TCTRL_VLINS; + gfar_write(®s->tctrl, tempval); + } + + if (features & NETIF_F_HW_VLAN_RX) { + /* Enable VLAN tag extraction */ + tempval = gfar_read(®s->rctrl); + tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT); + gfar_write(®s->rctrl, tempval); + } else { + /* Disable VLAN tag extraction */ + tempval = gfar_read(®s->rctrl); + tempval &= ~RCTRL_VLEX; + gfar_write(®s->rctrl, tempval); + + gfar_check_rx_parser_mode(priv); + } + + gfar_change_mtu(dev, dev->mtu); + + unlock_rx_qs(priv); + local_irq_restore(flags); +} + +static int gfar_change_mtu(struct net_device *dev, int new_mtu) +{ + int tempsize, tempval; + struct gfar_private *priv = netdev_priv(dev); + struct gfar __iomem *regs = priv->gfargrp[0].regs; + int oldsize = priv->rx_buffer_size; + int frame_size = new_mtu + ETH_HLEN; + + if (gfar_is_vlan_on(priv)) + frame_size += VLAN_HLEN; + + if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) { + netif_err(priv, drv, dev, "Invalid MTU setting\n"); + return -EINVAL; + } + + if (gfar_uses_fcb(priv)) + frame_size += GMAC_FCB_LEN; + + frame_size += priv->padding; + + 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(®s->mrblr, priv->rx_buffer_size); + gfar_write(®s->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(®s->maccfg2); + + if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE || + gfar_has_errata(priv, GFAR_ERRATA_74)) + tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); + else + tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK); + + gfar_write(®s->maccfg2, tempval); + + if ((oldsize != tempsize) && (dev->flags & IFF_UP)) + startup_gfar(dev); + + return 0; +} + +/* gfar_reset_task gets scheduled 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_reset_task(struct work_struct *work) +{ + struct gfar_private *priv = container_of(work, struct gfar_private, + reset_task); + struct net_device *dev = priv->ndev; + + if (dev->flags & IFF_UP) { + netif_tx_stop_all_queues(dev); + stop_gfar(dev); + startup_gfar(dev); + netif_tx_start_all_queues(dev); + } + + netif_tx_schedule_all(dev); +} + +static void gfar_timeout(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + + dev->stats.tx_errors++; + schedule_work(&priv->reset_task); +} + +static void gfar_align_skb(struct sk_buff *skb) +{ + /* 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, RXBUF_ALIGNMENT - + (((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1))); +} + +/* Interrupt Handler for Transmit complete */ +static int gfar_clean_tx_ring(struct gfar_priv_tx_q *tx_queue) +{ + struct net_device *dev = tx_queue->dev; + struct gfar_private *priv = netdev_priv(dev); + struct gfar_priv_rx_q *rx_queue = NULL; + struct txbd8 *bdp, *next = NULL; + struct txbd8 *lbdp = NULL; + struct txbd8 *base = tx_queue->tx_bd_base; + struct sk_buff *skb; + int skb_dirtytx; + int tx_ring_size = tx_queue->tx_ring_size; + int frags = 0, nr_txbds = 0; + int i; + int howmany = 0; + u32 lstatus; + size_t buflen; + + rx_queue = priv->rx_queue[tx_queue->qindex]; + bdp = tx_queue->dirty_tx; + skb_dirtytx = tx_queue->skb_dirtytx; + + while ((skb = tx_queue->tx_skbuff[skb_dirtytx])) { + unsigned long flags; + + frags = skb_shinfo(skb)->nr_frags; + + /* + * When time stamping, one additional TxBD must be freed. + * Also, we need to dma_unmap_single() the TxPAL. + */ + if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) + nr_txbds = frags + 2; + else + nr_txbds = frags + 1; + + lbdp = skip_txbd(bdp, nr_txbds - 1, base, tx_ring_size); + + lstatus = lbdp->lstatus; + + /* Only clean completed frames */ + if ((lstatus & BD_LFLAG(TXBD_READY)) && + (lstatus & BD_LENGTH_MASK)) + break; + + if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) { + next = next_txbd(bdp, base, tx_ring_size); + buflen = next->length + GMAC_FCB_LEN; + } else + buflen = bdp->length; + + dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr, + buflen, DMA_TO_DEVICE); + + if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_IN_PROGRESS)) { + struct skb_shared_hwtstamps shhwtstamps; + u64 *ns = (u64*) (((u32)skb->data + 0x10) & ~0x7); + memset(&shhwtstamps, 0, sizeof(shhwtstamps)); + shhwtstamps.hwtstamp = ns_to_ktime(*ns); + skb_tstamp_tx(skb, &shhwtstamps); + bdp->lstatus &= BD_LFLAG(TXBD_WRAP); + bdp = next; + } + + bdp->lstatus &= BD_LFLAG(TXBD_WRAP); + bdp = next_txbd(bdp, base, tx_ring_size); + + for (i = 0; i < frags; i++) { + dma_unmap_page(&priv->ofdev->dev, + bdp->bufPtr, + bdp->length, + DMA_TO_DEVICE); + bdp->lstatus &= BD_LFLAG(TXBD_WRAP); + bdp = next_txbd(bdp, base, tx_ring_size); + } + + /* + * If there's room in the queue (limit it to rx_buffer_size) + * we add this skb back into the pool, if it's the right size + */ + if (skb_queue_len(&priv->rx_recycle) < rx_queue->rx_ring_size && + skb_recycle_check(skb, priv->rx_buffer_size + + RXBUF_ALIGNMENT)) { + gfar_align_skb(skb); + skb_queue_head(&priv->rx_recycle, skb); + } else + dev_kfree_skb_any(skb); + + tx_queue->tx_skbuff[skb_dirtytx] = NULL; + + skb_dirtytx = (skb_dirtytx + 1) & + TX_RING_MOD_MASK(tx_ring_size); + + howmany++; + spin_lock_irqsave(&tx_queue->txlock, flags); + tx_queue->num_txbdfree += nr_txbds; + spin_unlock_irqrestore(&tx_queue->txlock, flags); + } + + /* If we freed a buffer, we can restart transmission, if necessary */ + if (__netif_subqueue_stopped(dev, tx_queue->qindex) && tx_queue->num_txbdfree) + netif_wake_subqueue(dev, tx_queue->qindex); + + /* Update dirty indicators */ + tx_queue->skb_dirtytx = skb_dirtytx; + tx_queue->dirty_tx = bdp; + + return howmany; +} + +static void gfar_schedule_cleanup(struct gfar_priv_grp *gfargrp) +{ + unsigned long flags; + + spin_lock_irqsave(&gfargrp->grplock, flags); + if (napi_schedule_prep(&gfargrp->napi)) { + gfar_write(&gfargrp->regs->imask, IMASK_RTX_DISABLED); + __napi_schedule(&gfargrp->napi); + } else { + /* + * Clear IEVENT, so interrupts aren't called again + * because of the packets that have already arrived. + */ + gfar_write(&gfargrp->regs->ievent, IEVENT_RTX_MASK); + } + spin_unlock_irqrestore(&gfargrp->grplock, flags); + +} + +/* Interrupt Handler for Transmit complete */ +static irqreturn_t gfar_transmit(int irq, void *grp_id) +{ + gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id); + return IRQ_HANDLED; +} + +static void gfar_new_rxbdp(struct gfar_priv_rx_q *rx_queue, struct rxbd8 *bdp, + struct sk_buff *skb) +{ + struct net_device *dev = rx_queue->dev; + struct gfar_private *priv = netdev_priv(dev); + dma_addr_t buf; + + buf = dma_map_single(&priv->ofdev->dev, skb->data, + priv->rx_buffer_size, DMA_FROM_DEVICE); + gfar_init_rxbdp(rx_queue, bdp, buf); +} + +static struct sk_buff * gfar_alloc_skb(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + struct sk_buff *skb = NULL; + + skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT); + if (!skb) + return NULL; + + gfar_align_skb(skb); + + return skb; +} + +struct sk_buff * gfar_new_skb(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + struct sk_buff *skb = NULL; + + skb = skb_dequeue(&priv->rx_recycle); + if (!skb) + skb = gfar_alloc_skb(dev); + + 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 *grp_id) +{ + gfar_schedule_cleanup((struct gfar_priv_grp *)grp_id); + return IRQ_HANDLED; +} + +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_checksum_none_assert(skb); +} + + +/* 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 amount_pull) +{ + struct gfar_private *priv = netdev_priv(dev); + struct rxfcb *fcb = NULL; + + int ret; + + /* fcb is at the beginning if exists */ + fcb = (struct rxfcb *)skb->data; + + /* Remove the FCB from the skb */ + /* Remove the padded bytes, if there are any */ + if (amount_pull) { + skb_record_rx_queue(skb, fcb->rq); + skb_pull(skb, amount_pull); + } + + /* Get receive timestamp from the skb */ + if (priv->hwts_rx_en) { + struct skb_shared_hwtstamps *shhwtstamps = skb_hwtstamps(skb); + u64 *ns = (u64 *) skb->data; + memset(shhwtstamps, 0, sizeof(*shhwtstamps)); + shhwtstamps->hwtstamp = ns_to_ktime(*ns); + } + + if (priv->padding) + skb_pull(skb, priv->padding); + + if (dev->features & NETIF_F_RXCSUM) + gfar_rx_checksum(skb, fcb); + + /* Tell the skb what kind of packet this is */ + skb->protocol = eth_type_trans(skb, dev); + + /* Set vlan tag */ + if (fcb->flags & RXFCB_VLN) + __vlan_hwaccel_put_tag(skb, fcb->vlctl); + + /* Send the packet up the stack */ + ret = netif_receive_skb(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 gfar_priv_rx_q *rx_queue, int rx_work_limit) +{ + struct net_device *dev = rx_queue->dev; + struct rxbd8 *bdp, *base; + struct sk_buff *skb; + int pkt_len; + int amount_pull; + int howmany = 0; + struct gfar_private *priv = netdev_priv(dev); + + /* Get the first full descriptor */ + bdp = rx_queue->cur_rx; + base = rx_queue->rx_bd_base; + + amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0); + + while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) { + struct sk_buff *newskb; + rmb(); + + /* Add another skb for the future */ + newskb = gfar_new_skb(dev); + + skb = rx_queue->rx_skbuff[rx_queue->skb_currx]; + + dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr, + priv->rx_buffer_size, DMA_FROM_DEVICE); + + if (unlikely(!(bdp->status & RXBD_ERR) && + bdp->length > priv->rx_buffer_size)) + bdp->status = RXBD_LARGE; + + /* We drop the frame if we failed to allocate a new buffer */ + if (unlikely(!newskb || !(bdp->status & RXBD_LAST) || + bdp->status & RXBD_ERR)) { + count_errors(bdp->status, dev); + + if (unlikely(!newskb)) + newskb = skb; + else if (skb) + skb_queue_head(&priv->rx_recycle, skb); + } else { + /* Increment the number of packets */ + rx_queue->stats.rx_packets++; + howmany++; + + if (likely(skb)) { + pkt_len = bdp->length - ETH_FCS_LEN; + /* Remove the FCS from the packet length */ + skb_put(skb, pkt_len); + rx_queue->stats.rx_bytes += pkt_len; + skb_record_rx_queue(skb, rx_queue->qindex); + gfar_process_frame(dev, skb, amount_pull); + + } else { + netif_warn(priv, rx_err, dev, "Missing skb!\n"); + rx_queue->stats.rx_dropped++; + priv->extra_stats.rx_skbmissing++; + } + + } + + rx_queue->rx_skbuff[rx_queue->skb_currx] = newskb; + + /* Setup the new bdp */ + gfar_new_rxbdp(rx_queue, bdp, newskb); + + /* Update to the next pointer */ + bdp = next_bd(bdp, base, rx_queue->rx_ring_size); + + /* update to point at the next skb */ + rx_queue->skb_currx = + (rx_queue->skb_currx + 1) & + RX_RING_MOD_MASK(rx_queue->rx_ring_size); + } + + /* Update the current rxbd pointer to be the next one */ + rx_queue->cur_rx = bdp; + + return howmany; +} + +static int gfar_poll(struct napi_struct *napi, int budget) +{ + struct gfar_priv_grp *gfargrp = container_of(napi, + struct gfar_priv_grp, napi); + struct gfar_private *priv = gfargrp->priv; + struct gfar __iomem *regs = gfargrp->regs; + struct gfar_priv_tx_q *tx_queue = NULL; + struct gfar_priv_rx_q *rx_queue = NULL; + int rx_cleaned = 0, budget_per_queue = 0, rx_cleaned_per_queue = 0; + int tx_cleaned = 0, i, left_over_budget = budget; + unsigned long serviced_queues = 0; + int num_queues = 0; + + num_queues = gfargrp->num_rx_queues; + budget_per_queue = budget/num_queues; + + /* Clear IEVENT, so interrupts aren't called again + * because of the packets that have already arrived */ + gfar_write(®s->ievent, IEVENT_RTX_MASK); + + while (num_queues && left_over_budget) { + + budget_per_queue = left_over_budget/num_queues; + left_over_budget = 0; + + for_each_set_bit(i, &gfargrp->rx_bit_map, priv->num_rx_queues) { + if (test_bit(i, &serviced_queues)) + continue; + rx_queue = priv->rx_queue[i]; + tx_queue = priv->tx_queue[rx_queue->qindex]; + + tx_cleaned += gfar_clean_tx_ring(tx_queue); + rx_cleaned_per_queue = gfar_clean_rx_ring(rx_queue, + budget_per_queue); + rx_cleaned += rx_cleaned_per_queue; + if(rx_cleaned_per_queue < budget_per_queue) { + left_over_budget = left_over_budget + + (budget_per_queue - rx_cleaned_per_queue); + set_bit(i, &serviced_queues); + num_queues--; + } + } + } + + if (tx_cleaned) + return budget; + + if (rx_cleaned < budget) { + napi_complete(napi); + + /* Clear the halt bit in RSTAT */ + gfar_write(®s->rstat, gfargrp->rstat); + + gfar_write(®s->imask, IMASK_DEFAULT); + + /* If we are coalescing interrupts, update the timer */ + /* Otherwise, clear it */ + gfar_configure_coalescing(priv, + gfargrp->rx_bit_map, gfargrp->tx_bit_map); + } + + return rx_cleaned; +} + +#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); + int i = 0; + + /* If the device has multiple interrupts, run tx/rx */ + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) { + for (i = 0; i < priv->num_grps; i++) { + disable_irq(priv->gfargrp[i].interruptTransmit); + disable_irq(priv->gfargrp[i].interruptReceive); + disable_irq(priv->gfargrp[i].interruptError); + gfar_interrupt(priv->gfargrp[i].interruptTransmit, + &priv->gfargrp[i]); + enable_irq(priv->gfargrp[i].interruptError); + enable_irq(priv->gfargrp[i].interruptReceive); + enable_irq(priv->gfargrp[i].interruptTransmit); + } + } else { + for (i = 0; i < priv->num_grps; i++) { + disable_irq(priv->gfargrp[i].interruptTransmit); + gfar_interrupt(priv->gfargrp[i].interruptTransmit, + &priv->gfargrp[i]); + enable_irq(priv->gfargrp[i].interruptTransmit); + } + } +} +#endif + +/* The interrupt handler for devices with one interrupt */ +static irqreturn_t gfar_interrupt(int irq, void *grp_id) +{ + struct gfar_priv_grp *gfargrp = grp_id; + + /* Save ievent for future reference */ + u32 events = gfar_read(&gfargrp->regs->ievent); + + /* Check for reception */ + if (events & IEVENT_RX_MASK) + gfar_receive(irq, grp_id); + + /* Check for transmit completion */ + if (events & IEVENT_TX_MASK) + gfar_transmit(irq, grp_id); + + /* Check for errors */ + if (events & IEVENT_ERR_MASK) + gfar_error(irq, grp_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->gfargrp[0].regs; + unsigned long flags; + struct phy_device *phydev = priv->phydev; + int new_state = 0; + + local_irq_save(flags); + lock_tx_qs(priv); + + 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); + + ecntrl &= ~(ECNTRL_R100); + 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: + netif_warn(priv, link, dev, + "Ack! Speed (%d) is not 10/100/1000!\n", + 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; + } + } 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); + unlock_tx_qs(priv); + local_irq_restore(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 netdev_hw_addr *ha; + struct gfar_private *priv = netdev_priv(dev); + struct gfar __iomem *regs = priv->gfargrp[0].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 (netdev_mc_empty(dev)) + return; + + /* Parse the list, and set the appropriate bits */ + netdev_for_each_mc_addr(ha, dev) { + if (idx < em_num) { + gfar_set_mac_for_addr(dev, idx, ha->addr); + idx++; + } else + gfar_set_hash_for_addr(dev, ha->addr); + } + } +} + + +/* 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; + static const 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, 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); +} + + +/* 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, + const u8 *addr) +{ + struct gfar_private *priv = netdev_priv(dev); + struct gfar __iomem *regs = priv->gfargrp[0].regs; + int idx; + char tmpbuf[MAC_ADDR_LEN]; + u32 tempval; + u32 __iomem *macptr = ®s->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 *grp_id) +{ + struct gfar_priv_grp *gfargrp = grp_id; + struct gfar __iomem *regs = gfargrp->regs; + struct gfar_private *priv= gfargrp->priv; + struct net_device *dev = priv->ndev; + + /* Save ievent for future reference */ + u32 events = gfar_read(®s->ievent); + + /* Clear IEVENT */ + gfar_write(®s->ievent, events & IEVENT_ERR_MASK); + + /* Magic Packet is not an error. */ + if ((priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) && + (events & IEVENT_MAG)) + events &= ~IEVENT_MAG; + + /* Hmm... */ + if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv)) + netdev_dbg(dev, "error interrupt (ievent=0x%08x imask=0x%08x)\n", + events, gfar_read(®s->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) { + unsigned long flags; + + netif_dbg(priv, tx_err, dev, + "TX FIFO underrun, packet dropped\n"); + dev->stats.tx_dropped++; + priv->extra_stats.tx_underrun++; + + local_irq_save(flags); + lock_tx_qs(priv); + + /* Reactivate the Tx Queues */ + gfar_write(®s->tstat, gfargrp->tstat); + + unlock_tx_qs(priv); + local_irq_restore(flags); + } + netif_dbg(priv, tx_err, dev, "Transmit Error\n"); + } + if (events & IEVENT_BSY) { + dev->stats.rx_errors++; + priv->extra_stats.rx_bsy++; + + gfar_receive(irq, grp_id); + + netif_dbg(priv, rx_err, dev, "busy error (rstat: %x)\n", + gfar_read(®s->rstat)); + } + if (events & IEVENT_BABR) { + dev->stats.rx_errors++; + priv->extra_stats.rx_babr++; + + netif_dbg(priv, rx_err, dev, "babbling RX error\n"); + } + if (events & IEVENT_EBERR) { + priv->extra_stats.eberr++; + netif_dbg(priv, rx_err, dev, "bus error\n"); + } + if (events & IEVENT_RXC) + netif_dbg(priv, rx_status, dev, "control frame\n"); + + if (events & IEVENT_BABT) { + priv->extra_stats.tx_babt++; + netif_dbg(priv, tx_err, dev, "babbling TX error\n"); + } + return IRQ_HANDLED; +} + +static struct of_device_id gfar_match[] = +{ + { + .type = "network", + .compatible = "gianfar", + }, + { + .compatible = "fsl,etsec2", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, gfar_match); + +/* Structure for a device driver */ +static struct platform_driver gfar_driver = { + .driver = { + .name = "fsl-gianfar", + .owner = THIS_MODULE, + .pm = GFAR_PM_OPS, + .of_match_table = gfar_match, + }, + .probe = gfar_probe, + .remove = gfar_remove, +}; + +static int __init gfar_init(void) +{ + return platform_driver_register(&gfar_driver); +} + +static void __exit gfar_exit(void) +{ + platform_driver_unregister(&gfar_driver); +} + +module_init(gfar_init); +module_exit(gfar_exit); + |