diff options
Diffstat (limited to 'drivers/net/gianfar.c')
| -rw-r--r-- | drivers/net/gianfar.c | 3281 |
1 files changed, 0 insertions, 3281 deletions
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c deleted file mode 100644 index d1bec626917..00000000000 --- a/drivers/net/gianfar.c +++ /dev/null @@ -1,3281 +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 - * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com> - * - * Copyright 2002-2009 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. - */ - -#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 "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, - const struct of_device_id *match); -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); -static void gfar_vlan_rx_register(struct net_device *netdev, - struct vlan_group *grp); -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, 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) { - pr_err("%s: Can't allocate RX buffers\n", - ndev->name); - 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) { - if (netif_msg_ifup(priv)) - pr_err("%s: Could not allocate buffer descriptors!\n", - ndev->name); - return -ENOMEM; - } - - for (i = 0; i < priv->num_tx_queues; i++) { - tx_queue = priv->tx_queue[i]; - tx_queue->tx_bd_base = (struct txbd8 *) 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 = (struct rxbd8 *) 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) { - if (netif_msg_ifup(priv)) - pr_err("%s: Could not allocate tx_skbuff\n", - ndev->name); - 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) { - if (netif_msg_ifup(priv)) - pr_err("%s: Could not allocate rx_skbuff\n", - ndev->name); - 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 (priv->rx_csum_enable) - rctrl |= RCTRL_CHECKSUMMING; - - if (priv->extended_hash) { - rctrl |= RCTRL_EXTHASH; - - gfar_clear_exact_match(ndev); - rctrl |= RCTRL_EMEN; - } - - if (priv->padding) { - rctrl &= ~RCTRL_PAL_MASK; - rctrl |= RCTRL_PADDING(priv->padding); - } - - /* 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; - - /* keep vlan related bits if it's enabled */ - if (priv->vlgrp) { - rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT; - tctrl |= TCTRL_VLINS; - } - - /* Init rctrl based on our settings */ - gfar_write(®s->rctrl, rctrl); - - if (ndev->features & NETIF_F_IP_CSUM) - tctrl |= TCTRL_INIT_CSUM; - - 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); - struct netdev_queue *txq; - 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++) { - txq = netdev_get_tx_queue(dev, i); - tx_bytes += txq->tx_bytes; - tx_packets += txq->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_multicast_list = gfar_set_multi, - .ndo_tx_timeout = gfar_timeout, - .ndo_do_ioctl = gfar_ioctl, - .ndo_get_stats = gfar_get_stats, - .ndo_vlan_rx_register = gfar_vlan_rx_register, - .ndo_set_mac_address = eth_mac_addr, - .ndo_validate_addr = eth_validate_addr, -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = gfar_netpoll, -#endif -}; - -unsigned int ftp_rqfpr[MAX_FILER_IDX + 1]; -unsigned int ftp_rqfcr[MAX_FILER_IDX + 1]; - -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); -} - -/* Returns 1 if incoming frames use an FCB */ -static inline int gfar_uses_fcb(struct gfar_private *priv) -{ - return priv->vlgrp || priv->rx_csum_enable || - (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) { - printk(KERN_ERR "num_tx_qs(=%d) greater than MAX_TX_QS(=%d)\n", - num_tx_qs, MAX_TX_QS); - printk(KERN_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) { - printk(KERN_ERR "num_rx_qs(=%d) greater than MAX_RX_QS(=%d)\n", - num_tx_qs, MAX_TX_QS); - printk(KERN_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; - - 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; - ftp_rqfpr[rqfar] = rqfpr; - ftp_rqfcr[rqfar] = rqfcr; - gfar_write_filer(priv, rqfar, rqfcr, rqfpr); - - rqfar--; - rqfcr = RQFCR_CMP_NOMATCH; - ftp_rqfpr[rqfar] = rqfpr; - 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; - ftp_rqfcr[rqfar] = rqfcr; - ftp_rqfpr[rqfar] = rqfpr; - gfar_write_filer(priv, rqfar, rqfcr, rqfpr); - - rqfar--; - rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_MASK | RQFCR_AND; - rqfpr = class; - ftp_rqfcr[rqfar] = rqfcr; - 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; - ftp_rqfcr[rqfar] = rqfcr; - 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++) { - ftp_rqfcr[i] = rqfcr; - 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; - - 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, - const struct of_device_id *match) -{ - 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) { - priv->rx_csum_enable = 1; - dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA; - } else - priv->rx_csum_enable = 0; - - priv->vlgrp = NULL; - - if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) - 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; - } - - /* enable filer if using multiple RX queues*/ - if(priv->num_rx_queues > 1) - 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) { - printk(KERN_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 */ - printk(KERN_INFO DEVICE_NAME "%pM\n", dev->name, dev->dev_addr); - - /* Even more device info helps when determining which kernel */ - /* provided which set of benchmarks. */ - printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name); - for (i = 0; i < priv->num_rx_queues; i++) - printk(KERN_INFO "%s: RX BD ring size for Q[%d]: %d\n", - dev->name, i, priv->rx_queue[i]->rx_ring_size); - for(i = 0; i < priv->num_tx_queues; i++) - printk(KERN_INFO "%s: TX BD ring size for Q[%d]: %d\n", - dev->name, 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) { - if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, grp->interruptError); - - goto err_irq_fail; - } - - if ((err = request_irq(grp->interruptTransmit, gfar_transmit, - 0, grp->int_name_tx, grp)) < 0) { - if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, grp->interruptTransmit); - goto tx_irq_fail; - } - - if ((err = request_irq(grp->interruptReceive, gfar_receive, 0, - grp->int_name_rx, grp)) < 0) { - if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, grp->interruptReceive); - goto rx_irq_fail; - } - } else { - if ((err = request_irq(grp->interruptTransmit, gfar_interrupt, 0, - grp->int_name_tx, grp)) < 0) { - if (netif_msg_intr(priv)) - printk(KERN_ERR "%s: Can't get IRQ %d\n", - dev->name, 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 */ - txq->tx_bytes += skb->len; - txq->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); - 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; -} - - -/* 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); - struct gfar __iomem *regs = NULL; - unsigned long flags; - u32 tempval; - - regs = priv->gfargrp[0].regs; - local_irq_save(flags); - lock_rx_qs(priv); - - priv->vlgrp = grp; - - if (grp) { - /* Enable VLAN tag insertion */ - tempval = gfar_read(®s->tctrl); - tempval |= TCTRL_VLINS; - - gfar_write(®s->tctrl, tempval); - - /* Enable VLAN tag extraction */ - tempval = gfar_read(®s->rctrl); - tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT); - gfar_write(®s->rctrl, tempval); - } else { - /* Disable VLAN tag insertion */ - tempval = gfar_read(®s->tctrl); - tempval &= ~TCTRL_VLINS; - gfar_write(®s->tctrl, tempval); - - /* Disable VLAN tag extraction */ - tempval = gfar_read(®s->rctrl); - tempval &= ~RCTRL_VLEX; - /* 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); - } - - 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 (priv->vlgrp) - frame_size += VLAN_HLEN; - - 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; - } - - 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 (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 = vlan_hwaccel_receive_skb(skb, priv->vlgrp, fcb->vlctl); - else - 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 { - if (netif_msg_rx_err(priv)) - printk(KERN_WARNING - "%s: Missing skb!\n", dev->name); - 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: - 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; - } - } 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; - 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); -} - - -/* 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); - 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)) - printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n", - dev->name, 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; - - 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++; - - 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); - } - 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, grp_id); - - if (netif_msg_rx_err(priv)) - printk(KERN_DEBUG "%s: busy error (rstat: %x)\n", - dev->name, gfar_read(®s->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; -} - -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 of_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 of_register_platform_driver(&gfar_driver); -} - -static void __exit gfar_exit(void) -{ - of_unregister_platform_driver(&gfar_driver); -} - -module_init(gfar_init); -module_exit(gfar_exit); - |