forked from Minki/linux
815b97c6b8
gianfar was unable to handle failed skb allocation for rx buffers, so we were spinning until it succeeded. Actually, it was worse--we were spinning for a long time, and then silently failing. Instead, we take Stephen Hemminger's suggestion to try the allocation earlier, and drop the packet if it failed. We also make a couple of tweaks to how buffer descriptors are set up. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2071 lines
54 KiB
C
2071 lines
54 KiB
C
/*
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* drivers/net/gianfar.c
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*
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* Gianfar Ethernet Driver
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* This driver is designed for the non-CPM ethernet controllers
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* on the 85xx and 83xx family of integrated processors
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* Based on 8260_io/fcc_enet.c
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*
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* Author: Andy Fleming
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* Maintainer: Kumar Gala
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*
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* Copyright (c) 2002-2006 Freescale Semiconductor, Inc.
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* Copyright (c) 2007 MontaVista Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Gianfar: AKA Lambda Draconis, "Dragon"
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* RA 11 31 24.2
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* Dec +69 19 52
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* V 3.84
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* B-V +1.62
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*
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* Theory of operation
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*
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* The driver is initialized through platform_device. Structures which
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* define the configuration needed by the board are defined in a
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* board structure in arch/ppc/platforms (though I do not
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* discount the possibility that other architectures could one
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* day be supported.
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*
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* The Gianfar Ethernet Controller uses a ring of buffer
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* descriptors. The beginning is indicated by a register
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* pointing to the physical address of the start of the ring.
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* The end is determined by a "wrap" bit being set in the
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* last descriptor of the ring.
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*
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* When a packet is received, the RXF bit in the
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* IEVENT register is set, triggering an interrupt when the
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* corresponding bit in the IMASK register is also set (if
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* interrupt coalescing is active, then the interrupt may not
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* happen immediately, but will wait until either a set number
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* of frames or amount of time have passed). In NAPI, the
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* interrupt handler will signal there is work to be done, and
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* exit. Without NAPI, the packet(s) will be handled
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* immediately. Both methods will start at the last known empty
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* descriptor, and process every subsequent descriptor until there
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* are none left with data (NAPI will stop after a set number of
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* packets to give time to other tasks, but will eventually
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* process all the packets). The data arrives inside a
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* pre-allocated skb, and so after the skb is passed up to the
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* stack, a new skb must be allocated, and the address field in
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* the buffer descriptor must be updated to indicate this new
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* skb.
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*
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* When the kernel requests that a packet be transmitted, the
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* driver starts where it left off last time, and points the
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* descriptor at the buffer which was passed in. The driver
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* then informs the DMA engine that there are packets ready to
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* be transmitted. Once the controller is finished transmitting
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* the packet, an interrupt may be triggered (under the same
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* conditions as for reception, but depending on the TXF bit).
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* The driver then cleans up the buffer.
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/if_vlan.h>
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#include <linux/spinlock.h>
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#include <linux/mm.h>
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#include <linux/platform_device.h>
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#include <linux/ip.h>
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#include <linux/tcp.h>
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#include <linux/udp.h>
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#include <linux/in.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <linux/crc32.h>
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#include <linux/mii.h>
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#include <linux/phy.h>
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#include "gianfar.h"
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#include "gianfar_mii.h"
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#define TX_TIMEOUT (1*HZ)
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#undef BRIEF_GFAR_ERRORS
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#undef VERBOSE_GFAR_ERRORS
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#ifdef CONFIG_GFAR_NAPI
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#define RECEIVE(x) netif_receive_skb(x)
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#else
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#define RECEIVE(x) netif_rx(x)
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#endif
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const char gfar_driver_name[] = "Gianfar Ethernet";
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const char gfar_driver_version[] = "1.3";
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static int gfar_enet_open(struct net_device *dev);
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static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev);
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static void gfar_timeout(struct net_device *dev);
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static int gfar_close(struct net_device *dev);
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struct sk_buff *gfar_new_skb(struct net_device *dev);
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static void gfar_new_rxbdp(struct net_device *dev, struct rxbd8 *bdp,
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struct sk_buff *skb);
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static int gfar_set_mac_address(struct net_device *dev);
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static int gfar_change_mtu(struct net_device *dev, int new_mtu);
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static irqreturn_t gfar_error(int irq, void *dev_id);
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static irqreturn_t gfar_transmit(int irq, void *dev_id);
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static irqreturn_t gfar_interrupt(int irq, void *dev_id);
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static void adjust_link(struct net_device *dev);
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static void init_registers(struct net_device *dev);
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static int init_phy(struct net_device *dev);
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static int gfar_probe(struct platform_device *pdev);
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static int gfar_remove(struct platform_device *pdev);
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static void free_skb_resources(struct gfar_private *priv);
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static void gfar_set_multi(struct net_device *dev);
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static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr);
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static void gfar_configure_serdes(struct net_device *dev);
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extern int gfar_local_mdio_write(struct gfar_mii __iomem *regs, int mii_id, int regnum, u16 value);
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extern int gfar_local_mdio_read(struct gfar_mii __iomem *regs, int mii_id, int regnum);
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#ifdef CONFIG_GFAR_NAPI
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static int gfar_poll(struct napi_struct *napi, int budget);
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#endif
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#ifdef CONFIG_NET_POLL_CONTROLLER
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static void gfar_netpoll(struct net_device *dev);
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#endif
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int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
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static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int length);
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static void gfar_vlan_rx_register(struct net_device *netdev,
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struct vlan_group *grp);
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void gfar_halt(struct net_device *dev);
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void gfar_start(struct net_device *dev);
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static void gfar_clear_exact_match(struct net_device *dev);
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static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr);
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extern const struct ethtool_ops gfar_ethtool_ops;
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MODULE_AUTHOR("Freescale Semiconductor, Inc");
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MODULE_DESCRIPTION("Gianfar Ethernet Driver");
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MODULE_LICENSE("GPL");
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/* Returns 1 if incoming frames use an FCB */
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static inline int gfar_uses_fcb(struct gfar_private *priv)
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{
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return (priv->vlan_enable || priv->rx_csum_enable);
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}
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/* Set up the ethernet device structure, private data,
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* and anything else we need before we start */
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static int gfar_probe(struct platform_device *pdev)
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{
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u32 tempval;
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struct net_device *dev = NULL;
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struct gfar_private *priv = NULL;
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struct gianfar_platform_data *einfo;
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struct resource *r;
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int err = 0;
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DECLARE_MAC_BUF(mac);
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einfo = (struct gianfar_platform_data *) pdev->dev.platform_data;
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if (NULL == einfo) {
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printk(KERN_ERR "gfar %d: Missing additional data!\n",
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pdev->id);
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return -ENODEV;
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}
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/* Create an ethernet device instance */
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dev = alloc_etherdev(sizeof (*priv));
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if (NULL == dev)
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return -ENOMEM;
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priv = netdev_priv(dev);
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priv->dev = dev;
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/* Set the info in the priv to the current info */
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priv->einfo = einfo;
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/* fill out IRQ fields */
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if (einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
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priv->interruptTransmit = platform_get_irq_byname(pdev, "tx");
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priv->interruptReceive = platform_get_irq_byname(pdev, "rx");
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priv->interruptError = platform_get_irq_byname(pdev, "error");
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if (priv->interruptTransmit < 0 || priv->interruptReceive < 0 || priv->interruptError < 0)
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goto regs_fail;
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} else {
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priv->interruptTransmit = platform_get_irq(pdev, 0);
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if (priv->interruptTransmit < 0)
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goto regs_fail;
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}
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/* get a pointer to the register memory */
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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priv->regs = ioremap(r->start, sizeof (struct gfar));
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if (NULL == priv->regs) {
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err = -ENOMEM;
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goto regs_fail;
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}
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spin_lock_init(&priv->txlock);
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spin_lock_init(&priv->rxlock);
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platform_set_drvdata(pdev, dev);
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/* Stop the DMA engine now, in case it was running before */
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/* (The firmware could have used it, and left it running). */
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/* To do this, we write Graceful Receive Stop and Graceful */
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/* Transmit Stop, and then wait until the corresponding bits */
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/* in IEVENT indicate the stops have completed. */
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tempval = gfar_read(&priv->regs->dmactrl);
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tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
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gfar_write(&priv->regs->dmactrl, tempval);
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tempval = gfar_read(&priv->regs->dmactrl);
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tempval |= (DMACTRL_GRS | DMACTRL_GTS);
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gfar_write(&priv->regs->dmactrl, tempval);
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while (!(gfar_read(&priv->regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)))
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cpu_relax();
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/* Reset MAC layer */
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gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
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tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
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gfar_write(&priv->regs->maccfg1, tempval);
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/* Initialize MACCFG2. */
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gfar_write(&priv->regs->maccfg2, MACCFG2_INIT_SETTINGS);
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/* Initialize ECNTRL */
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gfar_write(&priv->regs->ecntrl, ECNTRL_INIT_SETTINGS);
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/* Copy the station address into the dev structure, */
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memcpy(dev->dev_addr, einfo->mac_addr, MAC_ADDR_LEN);
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/* Set the dev->base_addr to the gfar reg region */
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dev->base_addr = (unsigned long) (priv->regs);
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SET_NETDEV_DEV(dev, &pdev->dev);
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/* Fill in the dev structure */
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dev->open = gfar_enet_open;
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dev->hard_start_xmit = gfar_start_xmit;
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dev->tx_timeout = gfar_timeout;
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dev->watchdog_timeo = TX_TIMEOUT;
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#ifdef CONFIG_GFAR_NAPI
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netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT);
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#endif
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#ifdef CONFIG_NET_POLL_CONTROLLER
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dev->poll_controller = gfar_netpoll;
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#endif
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dev->stop = gfar_close;
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dev->change_mtu = gfar_change_mtu;
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dev->mtu = 1500;
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dev->set_multicast_list = gfar_set_multi;
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dev->ethtool_ops = &gfar_ethtool_ops;
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if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
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priv->rx_csum_enable = 1;
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dev->features |= NETIF_F_IP_CSUM;
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} else
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priv->rx_csum_enable = 0;
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priv->vlgrp = NULL;
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if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) {
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dev->vlan_rx_register = gfar_vlan_rx_register;
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dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
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priv->vlan_enable = 1;
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}
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if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) {
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priv->extended_hash = 1;
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priv->hash_width = 9;
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priv->hash_regs[0] = &priv->regs->igaddr0;
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priv->hash_regs[1] = &priv->regs->igaddr1;
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priv->hash_regs[2] = &priv->regs->igaddr2;
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priv->hash_regs[3] = &priv->regs->igaddr3;
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priv->hash_regs[4] = &priv->regs->igaddr4;
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priv->hash_regs[5] = &priv->regs->igaddr5;
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priv->hash_regs[6] = &priv->regs->igaddr6;
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priv->hash_regs[7] = &priv->regs->igaddr7;
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priv->hash_regs[8] = &priv->regs->gaddr0;
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priv->hash_regs[9] = &priv->regs->gaddr1;
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priv->hash_regs[10] = &priv->regs->gaddr2;
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priv->hash_regs[11] = &priv->regs->gaddr3;
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priv->hash_regs[12] = &priv->regs->gaddr4;
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priv->hash_regs[13] = &priv->regs->gaddr5;
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priv->hash_regs[14] = &priv->regs->gaddr6;
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priv->hash_regs[15] = &priv->regs->gaddr7;
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} else {
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priv->extended_hash = 0;
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priv->hash_width = 8;
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priv->hash_regs[0] = &priv->regs->gaddr0;
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priv->hash_regs[1] = &priv->regs->gaddr1;
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priv->hash_regs[2] = &priv->regs->gaddr2;
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priv->hash_regs[3] = &priv->regs->gaddr3;
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priv->hash_regs[4] = &priv->regs->gaddr4;
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priv->hash_regs[5] = &priv->regs->gaddr5;
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priv->hash_regs[6] = &priv->regs->gaddr6;
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priv->hash_regs[7] = &priv->regs->gaddr7;
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}
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if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_PADDING)
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priv->padding = DEFAULT_PADDING;
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else
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priv->padding = 0;
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if (dev->features & NETIF_F_IP_CSUM)
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dev->hard_header_len += GMAC_FCB_LEN;
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priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
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priv->tx_ring_size = DEFAULT_TX_RING_SIZE;
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priv->rx_ring_size = DEFAULT_RX_RING_SIZE;
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priv->txcoalescing = DEFAULT_TX_COALESCE;
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priv->txcount = DEFAULT_TXCOUNT;
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priv->txtime = DEFAULT_TXTIME;
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priv->rxcoalescing = DEFAULT_RX_COALESCE;
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priv->rxcount = DEFAULT_RXCOUNT;
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priv->rxtime = DEFAULT_RXTIME;
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/* Enable most messages by default */
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priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
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err = register_netdev(dev);
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if (err) {
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printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
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dev->name);
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goto register_fail;
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}
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/* Create all the sysfs files */
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gfar_init_sysfs(dev);
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/* Print out the device info */
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printk(KERN_INFO DEVICE_NAME "%s\n",
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dev->name, print_mac(mac, dev->dev_addr));
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/* Even more device info helps when determining which kernel */
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/* provided which set of benchmarks. */
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#ifdef CONFIG_GFAR_NAPI
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printk(KERN_INFO "%s: Running with NAPI enabled\n", dev->name);
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#else
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printk(KERN_INFO "%s: Running with NAPI disabled\n", dev->name);
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#endif
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printk(KERN_INFO "%s: %d/%d RX/TX BD ring size\n",
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dev->name, priv->rx_ring_size, priv->tx_ring_size);
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return 0;
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register_fail:
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iounmap(priv->regs);
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regs_fail:
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free_netdev(dev);
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return err;
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}
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static int gfar_remove(struct platform_device *pdev)
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{
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struct net_device *dev = platform_get_drvdata(pdev);
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struct gfar_private *priv = netdev_priv(dev);
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platform_set_drvdata(pdev, NULL);
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iounmap(priv->regs);
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free_netdev(dev);
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return 0;
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}
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|
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/* Reads the controller's registers to determine what interface
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* connects it to the PHY.
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*/
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static phy_interface_t gfar_get_interface(struct net_device *dev)
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{
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struct gfar_private *priv = netdev_priv(dev);
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u32 ecntrl = gfar_read(&priv->regs->ecntrl);
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if (ecntrl & ECNTRL_SGMII_MODE)
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return PHY_INTERFACE_MODE_SGMII;
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if (ecntrl & ECNTRL_TBI_MODE) {
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if (ecntrl & ECNTRL_REDUCED_MODE)
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return PHY_INTERFACE_MODE_RTBI;
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else
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return PHY_INTERFACE_MODE_TBI;
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}
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if (ecntrl & ECNTRL_REDUCED_MODE) {
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if (ecntrl & ECNTRL_REDUCED_MII_MODE)
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return PHY_INTERFACE_MODE_RMII;
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else {
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phy_interface_t interface = priv->einfo->interface;
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/*
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* This isn't autodetected right now, so it must
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* be set by the device tree or platform code.
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*/
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if (interface == PHY_INTERFACE_MODE_RGMII_ID)
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return PHY_INTERFACE_MODE_RGMII_ID;
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return PHY_INTERFACE_MODE_RGMII;
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}
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}
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if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT)
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return PHY_INTERFACE_MODE_GMII;
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return PHY_INTERFACE_MODE_MII;
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}
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|
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/* Initializes driver's PHY state, and attaches to the PHY.
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* Returns 0 on success.
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*/
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static int init_phy(struct net_device *dev)
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{
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struct gfar_private *priv = netdev_priv(dev);
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uint gigabit_support =
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priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
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SUPPORTED_1000baseT_Full : 0;
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struct phy_device *phydev;
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char phy_id[BUS_ID_SIZE];
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phy_interface_t interface;
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priv->oldlink = 0;
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|
priv->oldspeed = 0;
|
|
priv->oldduplex = -1;
|
|
|
|
snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT, priv->einfo->bus_id, priv->einfo->phy_id);
|
|
|
|
interface = gfar_get_interface(dev);
|
|
|
|
phydev = phy_connect(dev, phy_id, &adjust_link, 0, interface);
|
|
|
|
if (interface == PHY_INTERFACE_MODE_SGMII)
|
|
gfar_configure_serdes(dev);
|
|
|
|
if (IS_ERR(phydev)) {
|
|
printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
|
|
return PTR_ERR(phydev);
|
|
}
|
|
|
|
/* Remove any features not supported by the controller */
|
|
phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
|
|
phydev->advertising = phydev->supported;
|
|
|
|
priv->phydev = phydev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void gfar_configure_serdes(struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct gfar_mii __iomem *regs =
|
|
(void __iomem *)&priv->regs->gfar_mii_regs;
|
|
|
|
/* Initialise TBI i/f to communicate with serdes (lynx phy) */
|
|
|
|
/* Single clk mode, mii mode off(for aerdes communication) */
|
|
gfar_local_mdio_write(regs, TBIPA_VALUE, MII_TBICON, TBICON_CLK_SELECT);
|
|
|
|
/* Supported pause and full-duplex, no half-duplex */
|
|
gfar_local_mdio_write(regs, TBIPA_VALUE, MII_ADVERTISE,
|
|
ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
|
|
ADVERTISE_1000XPSE_ASYM);
|
|
|
|
/* ANEG enable, restart ANEG, full duplex mode, speed[1] set */
|
|
gfar_local_mdio_write(regs, TBIPA_VALUE, MII_BMCR, BMCR_ANENABLE |
|
|
BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000);
|
|
}
|
|
|
|
static void init_registers(struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
|
|
/* Clear IEVENT */
|
|
gfar_write(&priv->regs->ievent, IEVENT_INIT_CLEAR);
|
|
|
|
/* Initialize IMASK */
|
|
gfar_write(&priv->regs->imask, IMASK_INIT_CLEAR);
|
|
|
|
/* Init hash registers to zero */
|
|
gfar_write(&priv->regs->igaddr0, 0);
|
|
gfar_write(&priv->regs->igaddr1, 0);
|
|
gfar_write(&priv->regs->igaddr2, 0);
|
|
gfar_write(&priv->regs->igaddr3, 0);
|
|
gfar_write(&priv->regs->igaddr4, 0);
|
|
gfar_write(&priv->regs->igaddr5, 0);
|
|
gfar_write(&priv->regs->igaddr6, 0);
|
|
gfar_write(&priv->regs->igaddr7, 0);
|
|
|
|
gfar_write(&priv->regs->gaddr0, 0);
|
|
gfar_write(&priv->regs->gaddr1, 0);
|
|
gfar_write(&priv->regs->gaddr2, 0);
|
|
gfar_write(&priv->regs->gaddr3, 0);
|
|
gfar_write(&priv->regs->gaddr4, 0);
|
|
gfar_write(&priv->regs->gaddr5, 0);
|
|
gfar_write(&priv->regs->gaddr6, 0);
|
|
gfar_write(&priv->regs->gaddr7, 0);
|
|
|
|
/* Zero out the rmon mib registers if it has them */
|
|
if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_RMON) {
|
|
memset_io(&(priv->regs->rmon), 0, sizeof (struct rmon_mib));
|
|
|
|
/* Mask off the CAM interrupts */
|
|
gfar_write(&priv->regs->rmon.cam1, 0xffffffff);
|
|
gfar_write(&priv->regs->rmon.cam2, 0xffffffff);
|
|
}
|
|
|
|
/* Initialize the max receive buffer length */
|
|
gfar_write(&priv->regs->mrblr, priv->rx_buffer_size);
|
|
|
|
/* Initialize the Minimum Frame Length Register */
|
|
gfar_write(&priv->regs->minflr, MINFLR_INIT_SETTINGS);
|
|
|
|
/* Assign the TBI an address which won't conflict with the PHYs */
|
|
gfar_write(&priv->regs->tbipa, TBIPA_VALUE);
|
|
}
|
|
|
|
|
|
/* Halt the receive and transmit queues */
|
|
void gfar_halt(struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct gfar __iomem *regs = priv->regs;
|
|
u32 tempval;
|
|
|
|
/* Mask all interrupts */
|
|
gfar_write(®s->imask, IMASK_INIT_CLEAR);
|
|
|
|
/* Clear all interrupts */
|
|
gfar_write(®s->ievent, IEVENT_INIT_CLEAR);
|
|
|
|
/* Stop the DMA, and wait for it to stop */
|
|
tempval = gfar_read(&priv->regs->dmactrl);
|
|
if ((tempval & (DMACTRL_GRS | DMACTRL_GTS))
|
|
!= (DMACTRL_GRS | DMACTRL_GTS)) {
|
|
tempval |= (DMACTRL_GRS | DMACTRL_GTS);
|
|
gfar_write(&priv->regs->dmactrl, tempval);
|
|
|
|
while (!(gfar_read(&priv->regs->ievent) &
|
|
(IEVENT_GRSC | IEVENT_GTSC)))
|
|
cpu_relax();
|
|
}
|
|
|
|
/* Disable Rx and Tx */
|
|
tempval = gfar_read(®s->maccfg1);
|
|
tempval &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
|
|
gfar_write(®s->maccfg1, tempval);
|
|
}
|
|
|
|
void stop_gfar(struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct gfar __iomem *regs = priv->regs;
|
|
unsigned long flags;
|
|
|
|
phy_stop(priv->phydev);
|
|
|
|
/* Lock it down */
|
|
spin_lock_irqsave(&priv->txlock, flags);
|
|
spin_lock(&priv->rxlock);
|
|
|
|
gfar_halt(dev);
|
|
|
|
spin_unlock(&priv->rxlock);
|
|
spin_unlock_irqrestore(&priv->txlock, flags);
|
|
|
|
/* Free the IRQs */
|
|
if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
|
|
free_irq(priv->interruptError, dev);
|
|
free_irq(priv->interruptTransmit, dev);
|
|
free_irq(priv->interruptReceive, dev);
|
|
} else {
|
|
free_irq(priv->interruptTransmit, dev);
|
|
}
|
|
|
|
free_skb_resources(priv);
|
|
|
|
dma_free_coherent(&dev->dev,
|
|
sizeof(struct txbd8)*priv->tx_ring_size
|
|
+ sizeof(struct rxbd8)*priv->rx_ring_size,
|
|
priv->tx_bd_base,
|
|
gfar_read(®s->tbase0));
|
|
}
|
|
|
|
/* If there are any tx skbs or rx skbs still around, free them.
|
|
* Then free tx_skbuff and rx_skbuff */
|
|
static void free_skb_resources(struct gfar_private *priv)
|
|
{
|
|
struct rxbd8 *rxbdp;
|
|
struct txbd8 *txbdp;
|
|
int i;
|
|
|
|
/* Go through all the buffer descriptors and free their data buffers */
|
|
txbdp = priv->tx_bd_base;
|
|
|
|
for (i = 0; i < priv->tx_ring_size; i++) {
|
|
|
|
if (priv->tx_skbuff[i]) {
|
|
dma_unmap_single(&priv->dev->dev, txbdp->bufPtr,
|
|
txbdp->length,
|
|
DMA_TO_DEVICE);
|
|
dev_kfree_skb_any(priv->tx_skbuff[i]);
|
|
priv->tx_skbuff[i] = NULL;
|
|
}
|
|
}
|
|
|
|
kfree(priv->tx_skbuff);
|
|
|
|
rxbdp = priv->rx_bd_base;
|
|
|
|
/* rx_skbuff is not guaranteed to be allocated, so only
|
|
* free it and its contents if it is allocated */
|
|
if(priv->rx_skbuff != NULL) {
|
|
for (i = 0; i < priv->rx_ring_size; i++) {
|
|
if (priv->rx_skbuff[i]) {
|
|
dma_unmap_single(&priv->dev->dev, rxbdp->bufPtr,
|
|
priv->rx_buffer_size,
|
|
DMA_FROM_DEVICE);
|
|
|
|
dev_kfree_skb_any(priv->rx_skbuff[i]);
|
|
priv->rx_skbuff[i] = NULL;
|
|
}
|
|
|
|
rxbdp->status = 0;
|
|
rxbdp->length = 0;
|
|
rxbdp->bufPtr = 0;
|
|
|
|
rxbdp++;
|
|
}
|
|
|
|
kfree(priv->rx_skbuff);
|
|
}
|
|
}
|
|
|
|
void gfar_start(struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct gfar __iomem *regs = priv->regs;
|
|
u32 tempval;
|
|
|
|
/* Enable Rx and Tx in MACCFG1 */
|
|
tempval = gfar_read(®s->maccfg1);
|
|
tempval |= (MACCFG1_RX_EN | MACCFG1_TX_EN);
|
|
gfar_write(®s->maccfg1, tempval);
|
|
|
|
/* Initialize DMACTRL to have WWR and WOP */
|
|
tempval = gfar_read(&priv->regs->dmactrl);
|
|
tempval |= DMACTRL_INIT_SETTINGS;
|
|
gfar_write(&priv->regs->dmactrl, tempval);
|
|
|
|
/* Make sure we aren't stopped */
|
|
tempval = gfar_read(&priv->regs->dmactrl);
|
|
tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
|
|
gfar_write(&priv->regs->dmactrl, tempval);
|
|
|
|
/* Clear THLT/RHLT, so that the DMA starts polling now */
|
|
gfar_write(®s->tstat, TSTAT_CLEAR_THALT);
|
|
gfar_write(®s->rstat, RSTAT_CLEAR_RHALT);
|
|
|
|
/* Unmask the interrupts we look for */
|
|
gfar_write(®s->imask, IMASK_DEFAULT);
|
|
}
|
|
|
|
/* Bring the controller up and running */
|
|
int startup_gfar(struct net_device *dev)
|
|
{
|
|
struct txbd8 *txbdp;
|
|
struct rxbd8 *rxbdp;
|
|
dma_addr_t addr = 0;
|
|
unsigned long vaddr;
|
|
int i;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct gfar __iomem *regs = priv->regs;
|
|
int err = 0;
|
|
u32 rctrl = 0;
|
|
u32 attrs = 0;
|
|
|
|
gfar_write(®s->imask, IMASK_INIT_CLEAR);
|
|
|
|
/* Allocate memory for the buffer descriptors */
|
|
vaddr = (unsigned long) dma_alloc_coherent(&dev->dev,
|
|
sizeof (struct txbd8) * priv->tx_ring_size +
|
|
sizeof (struct rxbd8) * priv->rx_ring_size,
|
|
&addr, GFP_KERNEL);
|
|
|
|
if (vaddr == 0) {
|
|
if (netif_msg_ifup(priv))
|
|
printk(KERN_ERR "%s: Could not allocate buffer descriptors!\n",
|
|
dev->name);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
priv->tx_bd_base = (struct txbd8 *) vaddr;
|
|
|
|
/* enet DMA only understands physical addresses */
|
|
gfar_write(®s->tbase0, addr);
|
|
|
|
/* Start the rx descriptor ring where the tx ring leaves off */
|
|
addr = addr + sizeof (struct txbd8) * priv->tx_ring_size;
|
|
vaddr = vaddr + sizeof (struct txbd8) * priv->tx_ring_size;
|
|
priv->rx_bd_base = (struct rxbd8 *) vaddr;
|
|
gfar_write(®s->rbase0, addr);
|
|
|
|
/* Setup the skbuff rings */
|
|
priv->tx_skbuff =
|
|
(struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
|
|
priv->tx_ring_size, GFP_KERNEL);
|
|
|
|
if (NULL == priv->tx_skbuff) {
|
|
if (netif_msg_ifup(priv))
|
|
printk(KERN_ERR "%s: Could not allocate tx_skbuff\n",
|
|
dev->name);
|
|
err = -ENOMEM;
|
|
goto tx_skb_fail;
|
|
}
|
|
|
|
for (i = 0; i < priv->tx_ring_size; i++)
|
|
priv->tx_skbuff[i] = NULL;
|
|
|
|
priv->rx_skbuff =
|
|
(struct sk_buff **) kmalloc(sizeof (struct sk_buff *) *
|
|
priv->rx_ring_size, GFP_KERNEL);
|
|
|
|
if (NULL == priv->rx_skbuff) {
|
|
if (netif_msg_ifup(priv))
|
|
printk(KERN_ERR "%s: Could not allocate rx_skbuff\n",
|
|
dev->name);
|
|
err = -ENOMEM;
|
|
goto rx_skb_fail;
|
|
}
|
|
|
|
for (i = 0; i < priv->rx_ring_size; i++)
|
|
priv->rx_skbuff[i] = NULL;
|
|
|
|
/* Initialize some variables in our dev structure */
|
|
priv->dirty_tx = priv->cur_tx = priv->tx_bd_base;
|
|
priv->cur_rx = priv->rx_bd_base;
|
|
priv->skb_curtx = priv->skb_dirtytx = 0;
|
|
priv->skb_currx = 0;
|
|
|
|
/* Initialize Transmit Descriptor Ring */
|
|
txbdp = priv->tx_bd_base;
|
|
for (i = 0; i < priv->tx_ring_size; i++) {
|
|
txbdp->status = 0;
|
|
txbdp->length = 0;
|
|
txbdp->bufPtr = 0;
|
|
txbdp++;
|
|
}
|
|
|
|
/* Set the last descriptor in the ring to indicate wrap */
|
|
txbdp--;
|
|
txbdp->status |= TXBD_WRAP;
|
|
|
|
rxbdp = priv->rx_bd_base;
|
|
for (i = 0; i < priv->rx_ring_size; i++) {
|
|
struct sk_buff *skb;
|
|
|
|
skb = gfar_new_skb(dev);
|
|
|
|
if (!skb) {
|
|
printk(KERN_ERR "%s: Can't allocate RX buffers\n",
|
|
dev->name);
|
|
|
|
goto err_rxalloc_fail;
|
|
}
|
|
|
|
priv->rx_skbuff[i] = skb;
|
|
|
|
gfar_new_rxbdp(dev, rxbdp, skb);
|
|
|
|
rxbdp++;
|
|
}
|
|
|
|
/* Set the last descriptor in the ring to wrap */
|
|
rxbdp--;
|
|
rxbdp->status |= RXBD_WRAP;
|
|
|
|
/* If the device has multiple interrupts, register for
|
|
* them. Otherwise, only register for the one */
|
|
if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
|
|
/* Install our interrupt handlers for Error,
|
|
* Transmit, and Receive */
|
|
if (request_irq(priv->interruptError, gfar_error,
|
|
0, "enet_error", dev) < 0) {
|
|
if (netif_msg_intr(priv))
|
|
printk(KERN_ERR "%s: Can't get IRQ %d\n",
|
|
dev->name, priv->interruptError);
|
|
|
|
err = -1;
|
|
goto err_irq_fail;
|
|
}
|
|
|
|
if (request_irq(priv->interruptTransmit, gfar_transmit,
|
|
0, "enet_tx", dev) < 0) {
|
|
if (netif_msg_intr(priv))
|
|
printk(KERN_ERR "%s: Can't get IRQ %d\n",
|
|
dev->name, priv->interruptTransmit);
|
|
|
|
err = -1;
|
|
|
|
goto tx_irq_fail;
|
|
}
|
|
|
|
if (request_irq(priv->interruptReceive, gfar_receive,
|
|
0, "enet_rx", dev) < 0) {
|
|
if (netif_msg_intr(priv))
|
|
printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n",
|
|
dev->name, priv->interruptReceive);
|
|
|
|
err = -1;
|
|
goto rx_irq_fail;
|
|
}
|
|
} else {
|
|
if (request_irq(priv->interruptTransmit, gfar_interrupt,
|
|
0, "gfar_interrupt", dev) < 0) {
|
|
if (netif_msg_intr(priv))
|
|
printk(KERN_ERR "%s: Can't get IRQ %d\n",
|
|
dev->name, priv->interruptError);
|
|
|
|
err = -1;
|
|
goto err_irq_fail;
|
|
}
|
|
}
|
|
|
|
phy_start(priv->phydev);
|
|
|
|
/* Configure the coalescing support */
|
|
if (priv->txcoalescing)
|
|
gfar_write(®s->txic,
|
|
mk_ic_value(priv->txcount, priv->txtime));
|
|
else
|
|
gfar_write(®s->txic, 0);
|
|
|
|
if (priv->rxcoalescing)
|
|
gfar_write(®s->rxic,
|
|
mk_ic_value(priv->rxcount, priv->rxtime));
|
|
else
|
|
gfar_write(®s->rxic, 0);
|
|
|
|
if (priv->rx_csum_enable)
|
|
rctrl |= RCTRL_CHECKSUMMING;
|
|
|
|
if (priv->extended_hash) {
|
|
rctrl |= RCTRL_EXTHASH;
|
|
|
|
gfar_clear_exact_match(dev);
|
|
rctrl |= RCTRL_EMEN;
|
|
}
|
|
|
|
if (priv->vlan_enable)
|
|
rctrl |= RCTRL_VLAN;
|
|
|
|
if (priv->padding) {
|
|
rctrl &= ~RCTRL_PAL_MASK;
|
|
rctrl |= RCTRL_PADDING(priv->padding);
|
|
}
|
|
|
|
/* Init rctrl based on our settings */
|
|
gfar_write(&priv->regs->rctrl, rctrl);
|
|
|
|
if (dev->features & NETIF_F_IP_CSUM)
|
|
gfar_write(&priv->regs->tctrl, TCTRL_INIT_CSUM);
|
|
|
|
/* Set the extraction length and index */
|
|
attrs = ATTRELI_EL(priv->rx_stash_size) |
|
|
ATTRELI_EI(priv->rx_stash_index);
|
|
|
|
gfar_write(&priv->regs->attreli, attrs);
|
|
|
|
/* Start with defaults, and add stashing or locking
|
|
* depending on the approprate variables */
|
|
attrs = ATTR_INIT_SETTINGS;
|
|
|
|
if (priv->bd_stash_en)
|
|
attrs |= ATTR_BDSTASH;
|
|
|
|
if (priv->rx_stash_size != 0)
|
|
attrs |= ATTR_BUFSTASH;
|
|
|
|
gfar_write(&priv->regs->attr, attrs);
|
|
|
|
gfar_write(&priv->regs->fifo_tx_thr, priv->fifo_threshold);
|
|
gfar_write(&priv->regs->fifo_tx_starve, priv->fifo_starve);
|
|
gfar_write(&priv->regs->fifo_tx_starve_shutoff, priv->fifo_starve_off);
|
|
|
|
/* Start the controller */
|
|
gfar_start(dev);
|
|
|
|
return 0;
|
|
|
|
rx_irq_fail:
|
|
free_irq(priv->interruptTransmit, dev);
|
|
tx_irq_fail:
|
|
free_irq(priv->interruptError, dev);
|
|
err_irq_fail:
|
|
err_rxalloc_fail:
|
|
rx_skb_fail:
|
|
free_skb_resources(priv);
|
|
tx_skb_fail:
|
|
dma_free_coherent(&dev->dev,
|
|
sizeof(struct txbd8)*priv->tx_ring_size
|
|
+ sizeof(struct rxbd8)*priv->rx_ring_size,
|
|
priv->tx_bd_base,
|
|
gfar_read(®s->tbase0));
|
|
|
|
return err;
|
|
}
|
|
|
|
/* Called when something needs to use the ethernet device */
|
|
/* Returns 0 for success. */
|
|
static int gfar_enet_open(struct net_device *dev)
|
|
{
|
|
#ifdef CONFIG_GFAR_NAPI
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
#endif
|
|
int err;
|
|
|
|
#ifdef CONFIG_GFAR_NAPI
|
|
napi_enable(&priv->napi);
|
|
#endif
|
|
|
|
/* Initialize a bunch of registers */
|
|
init_registers(dev);
|
|
|
|
gfar_set_mac_address(dev);
|
|
|
|
err = init_phy(dev);
|
|
|
|
if(err) {
|
|
#ifdef CONFIG_GFAR_NAPI
|
|
napi_disable(&priv->napi);
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
err = startup_gfar(dev);
|
|
if (err) {
|
|
#ifdef CONFIG_GFAR_NAPI
|
|
napi_disable(&priv->napi);
|
|
#endif
|
|
return err;
|
|
}
|
|
|
|
netif_start_queue(dev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb, struct txbd8 *bdp)
|
|
{
|
|
struct txfcb *fcb = (struct txfcb *)skb_push (skb, GMAC_FCB_LEN);
|
|
|
|
memset(fcb, 0, GMAC_FCB_LEN);
|
|
|
|
return fcb;
|
|
}
|
|
|
|
static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb)
|
|
{
|
|
u8 flags = 0;
|
|
|
|
/* If we're here, it's a IP packet with a TCP or UDP
|
|
* payload. We set it to checksum, using a pseudo-header
|
|
* we provide
|
|
*/
|
|
flags = TXFCB_DEFAULT;
|
|
|
|
/* Tell the controller what the protocol is */
|
|
/* And provide the already calculated phcs */
|
|
if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
|
|
flags |= TXFCB_UDP;
|
|
fcb->phcs = udp_hdr(skb)->check;
|
|
} else
|
|
fcb->phcs = tcp_hdr(skb)->check;
|
|
|
|
/* l3os is the distance between the start of the
|
|
* frame (skb->data) and the start of the IP hdr.
|
|
* l4os is the distance between the start of the
|
|
* l3 hdr and the l4 hdr */
|
|
fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN);
|
|
fcb->l4os = skb_network_header_len(skb);
|
|
|
|
fcb->flags = flags;
|
|
}
|
|
|
|
void inline gfar_tx_vlan(struct sk_buff *skb, struct txfcb *fcb)
|
|
{
|
|
fcb->flags |= TXFCB_VLN;
|
|
fcb->vlctl = vlan_tx_tag_get(skb);
|
|
}
|
|
|
|
/* This is called by the kernel when a frame is ready for transmission. */
|
|
/* It is pointed to by the dev->hard_start_xmit function pointer */
|
|
static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct txfcb *fcb = NULL;
|
|
struct txbd8 *txbdp;
|
|
u16 status;
|
|
unsigned long flags;
|
|
|
|
/* Update transmit stats */
|
|
dev->stats.tx_bytes += skb->len;
|
|
|
|
/* Lock priv now */
|
|
spin_lock_irqsave(&priv->txlock, flags);
|
|
|
|
/* Point at the first free tx descriptor */
|
|
txbdp = priv->cur_tx;
|
|
|
|
/* Clear all but the WRAP status flags */
|
|
status = txbdp->status & TXBD_WRAP;
|
|
|
|
/* Set up checksumming */
|
|
if (likely((dev->features & NETIF_F_IP_CSUM)
|
|
&& (CHECKSUM_PARTIAL == skb->ip_summed))) {
|
|
fcb = gfar_add_fcb(skb, txbdp);
|
|
status |= TXBD_TOE;
|
|
gfar_tx_checksum(skb, fcb);
|
|
}
|
|
|
|
if (priv->vlan_enable &&
|
|
unlikely(priv->vlgrp && vlan_tx_tag_present(skb))) {
|
|
if (unlikely(NULL == fcb)) {
|
|
fcb = gfar_add_fcb(skb, txbdp);
|
|
status |= TXBD_TOE;
|
|
}
|
|
|
|
gfar_tx_vlan(skb, fcb);
|
|
}
|
|
|
|
/* Set buffer length and pointer */
|
|
txbdp->length = skb->len;
|
|
txbdp->bufPtr = dma_map_single(&dev->dev, skb->data,
|
|
skb->len, DMA_TO_DEVICE);
|
|
|
|
/* Save the skb pointer so we can free it later */
|
|
priv->tx_skbuff[priv->skb_curtx] = skb;
|
|
|
|
/* Update the current skb pointer (wrapping if this was the last) */
|
|
priv->skb_curtx =
|
|
(priv->skb_curtx + 1) & TX_RING_MOD_MASK(priv->tx_ring_size);
|
|
|
|
/* Flag the BD as interrupt-causing */
|
|
status |= TXBD_INTERRUPT;
|
|
|
|
/* Flag the BD as ready to go, last in frame, and */
|
|
/* in need of CRC */
|
|
status |= (TXBD_READY | TXBD_LAST | TXBD_CRC);
|
|
|
|
dev->trans_start = jiffies;
|
|
|
|
/* The powerpc-specific eieio() is used, as wmb() has too strong
|
|
* semantics (it requires synchronization between cacheable and
|
|
* uncacheable mappings, which eieio doesn't provide and which we
|
|
* don't need), thus requiring a more expensive sync instruction. At
|
|
* some point, the set of architecture-independent barrier functions
|
|
* should be expanded to include weaker barriers.
|
|
*/
|
|
|
|
eieio();
|
|
txbdp->status = status;
|
|
|
|
/* If this was the last BD in the ring, the next one */
|
|
/* is at the beginning of the ring */
|
|
if (txbdp->status & TXBD_WRAP)
|
|
txbdp = priv->tx_bd_base;
|
|
else
|
|
txbdp++;
|
|
|
|
/* If the next BD still needs to be cleaned up, then the bds
|
|
are full. We need to tell the kernel to stop sending us stuff. */
|
|
if (txbdp == priv->dirty_tx) {
|
|
netif_stop_queue(dev);
|
|
|
|
dev->stats.tx_fifo_errors++;
|
|
}
|
|
|
|
/* Update the current txbd to the next one */
|
|
priv->cur_tx = txbdp;
|
|
|
|
/* Tell the DMA to go go go */
|
|
gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
|
|
|
|
/* Unlock priv */
|
|
spin_unlock_irqrestore(&priv->txlock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Stops the kernel queue, and halts the controller */
|
|
static int gfar_close(struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
|
|
#ifdef CONFIG_GFAR_NAPI
|
|
napi_disable(&priv->napi);
|
|
#endif
|
|
|
|
stop_gfar(dev);
|
|
|
|
/* Disconnect from the PHY */
|
|
phy_disconnect(priv->phydev);
|
|
priv->phydev = NULL;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Changes the mac address if the controller is not running. */
|
|
int gfar_set_mac_address(struct net_device *dev)
|
|
{
|
|
gfar_set_mac_for_addr(dev, 0, dev->dev_addr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Enables and disables VLAN insertion/extraction */
|
|
static void gfar_vlan_rx_register(struct net_device *dev,
|
|
struct vlan_group *grp)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
unsigned long flags;
|
|
u32 tempval;
|
|
|
|
spin_lock_irqsave(&priv->rxlock, flags);
|
|
|
|
priv->vlgrp = grp;
|
|
|
|
if (grp) {
|
|
/* Enable VLAN tag insertion */
|
|
tempval = gfar_read(&priv->regs->tctrl);
|
|
tempval |= TCTRL_VLINS;
|
|
|
|
gfar_write(&priv->regs->tctrl, tempval);
|
|
|
|
/* Enable VLAN tag extraction */
|
|
tempval = gfar_read(&priv->regs->rctrl);
|
|
tempval |= RCTRL_VLEX;
|
|
gfar_write(&priv->regs->rctrl, tempval);
|
|
} else {
|
|
/* Disable VLAN tag insertion */
|
|
tempval = gfar_read(&priv->regs->tctrl);
|
|
tempval &= ~TCTRL_VLINS;
|
|
gfar_write(&priv->regs->tctrl, tempval);
|
|
|
|
/* Disable VLAN tag extraction */
|
|
tempval = gfar_read(&priv->regs->rctrl);
|
|
tempval &= ~RCTRL_VLEX;
|
|
gfar_write(&priv->regs->rctrl, tempval);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->rxlock, flags);
|
|
}
|
|
|
|
static int gfar_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
|
int tempsize, tempval;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
int oldsize = priv->rx_buffer_size;
|
|
int frame_size = new_mtu + ETH_HLEN;
|
|
|
|
if (priv->vlan_enable)
|
|
frame_size += VLAN_HLEN;
|
|
|
|
if (gfar_uses_fcb(priv))
|
|
frame_size += GMAC_FCB_LEN;
|
|
|
|
frame_size += priv->padding;
|
|
|
|
if ((frame_size < 64) || (frame_size > JUMBO_FRAME_SIZE)) {
|
|
if (netif_msg_drv(priv))
|
|
printk(KERN_ERR "%s: Invalid MTU setting\n",
|
|
dev->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
tempsize =
|
|
(frame_size & ~(INCREMENTAL_BUFFER_SIZE - 1)) +
|
|
INCREMENTAL_BUFFER_SIZE;
|
|
|
|
/* Only stop and start the controller if it isn't already
|
|
* stopped, and we changed something */
|
|
if ((oldsize != tempsize) && (dev->flags & IFF_UP))
|
|
stop_gfar(dev);
|
|
|
|
priv->rx_buffer_size = tempsize;
|
|
|
|
dev->mtu = new_mtu;
|
|
|
|
gfar_write(&priv->regs->mrblr, priv->rx_buffer_size);
|
|
gfar_write(&priv->regs->maxfrm, priv->rx_buffer_size);
|
|
|
|
/* If the mtu is larger than the max size for standard
|
|
* ethernet frames (ie, a jumbo frame), then set maccfg2
|
|
* to allow huge frames, and to check the length */
|
|
tempval = gfar_read(&priv->regs->maccfg2);
|
|
|
|
if (priv->rx_buffer_size > DEFAULT_RX_BUFFER_SIZE)
|
|
tempval |= (MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
|
|
else
|
|
tempval &= ~(MACCFG2_HUGEFRAME | MACCFG2_LENGTHCHECK);
|
|
|
|
gfar_write(&priv->regs->maccfg2, tempval);
|
|
|
|
if ((oldsize != tempsize) && (dev->flags & IFF_UP))
|
|
startup_gfar(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* gfar_timeout gets called when a packet has not been
|
|
* transmitted after a set amount of time.
|
|
* For now, assume that clearing out all the structures, and
|
|
* starting over will fix the problem. */
|
|
static void gfar_timeout(struct net_device *dev)
|
|
{
|
|
dev->stats.tx_errors++;
|
|
|
|
if (dev->flags & IFF_UP) {
|
|
stop_gfar(dev);
|
|
startup_gfar(dev);
|
|
}
|
|
|
|
netif_schedule(dev);
|
|
}
|
|
|
|
/* Interrupt Handler for Transmit complete */
|
|
int gfar_clean_tx_ring(struct net_device *dev)
|
|
{
|
|
struct txbd8 *bdp;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
int howmany = 0;
|
|
|
|
bdp = priv->dirty_tx;
|
|
while ((bdp->status & TXBD_READY) == 0) {
|
|
/* If dirty_tx and cur_tx are the same, then either the */
|
|
/* ring is empty or full now (it could only be full in the beginning, */
|
|
/* obviously). If it is empty, we are done. */
|
|
if ((bdp == priv->cur_tx) && (netif_queue_stopped(dev) == 0))
|
|
break;
|
|
|
|
howmany++;
|
|
|
|
/* Deferred means some collisions occurred during transmit, */
|
|
/* but we eventually sent the packet. */
|
|
if (bdp->status & TXBD_DEF)
|
|
dev->stats.collisions++;
|
|
|
|
/* Free the sk buffer associated with this TxBD */
|
|
dev_kfree_skb_irq(priv->tx_skbuff[priv->skb_dirtytx]);
|
|
|
|
priv->tx_skbuff[priv->skb_dirtytx] = NULL;
|
|
priv->skb_dirtytx =
|
|
(priv->skb_dirtytx +
|
|
1) & TX_RING_MOD_MASK(priv->tx_ring_size);
|
|
|
|
/* Clean BD length for empty detection */
|
|
bdp->length = 0;
|
|
|
|
/* update bdp to point at next bd in the ring (wrapping if necessary) */
|
|
if (bdp->status & TXBD_WRAP)
|
|
bdp = priv->tx_bd_base;
|
|
else
|
|
bdp++;
|
|
|
|
/* Move dirty_tx to be the next bd */
|
|
priv->dirty_tx = bdp;
|
|
|
|
/* We freed a buffer, so now we can restart transmission */
|
|
if (netif_queue_stopped(dev))
|
|
netif_wake_queue(dev);
|
|
} /* while ((bdp->status & TXBD_READY) == 0) */
|
|
|
|
dev->stats.tx_packets += howmany;
|
|
|
|
return howmany;
|
|
}
|
|
|
|
/* Interrupt Handler for Transmit complete */
|
|
static irqreturn_t gfar_transmit(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = (struct net_device *) dev_id;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
|
|
/* Clear IEVENT */
|
|
gfar_write(&priv->regs->ievent, IEVENT_TX_MASK);
|
|
|
|
/* Lock priv */
|
|
spin_lock(&priv->txlock);
|
|
|
|
gfar_clean_tx_ring(dev);
|
|
|
|
/* If we are coalescing the interrupts, reset the timer */
|
|
/* Otherwise, clear it */
|
|
if (likely(priv->txcoalescing)) {
|
|
gfar_write(&priv->regs->txic, 0);
|
|
gfar_write(&priv->regs->txic,
|
|
mk_ic_value(priv->txcount, priv->txtime));
|
|
}
|
|
|
|
spin_unlock(&priv->txlock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void gfar_new_rxbdp(struct net_device *dev, struct rxbd8 *bdp,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
u32 * status_len = (u32 *)bdp;
|
|
u16 flags;
|
|
|
|
bdp->bufPtr = dma_map_single(&dev->dev, skb->data,
|
|
priv->rx_buffer_size, DMA_FROM_DEVICE);
|
|
|
|
flags = RXBD_EMPTY | RXBD_INTERRUPT;
|
|
|
|
if (bdp == priv->rx_bd_base + priv->rx_ring_size - 1)
|
|
flags |= RXBD_WRAP;
|
|
|
|
eieio();
|
|
|
|
*status_len = (u32)flags << 16;
|
|
}
|
|
|
|
|
|
struct sk_buff * gfar_new_skb(struct net_device *dev)
|
|
{
|
|
unsigned int alignamount;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct sk_buff *skb = NULL;
|
|
|
|
/* We have to allocate the skb, so keep trying till we succeed */
|
|
skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
|
|
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
alignamount = RXBUF_ALIGNMENT -
|
|
(((unsigned long) skb->data) & (RXBUF_ALIGNMENT - 1));
|
|
|
|
/* We need the data buffer to be aligned properly. We will reserve
|
|
* as many bytes as needed to align the data properly
|
|
*/
|
|
skb_reserve(skb, alignamount);
|
|
|
|
return skb;
|
|
}
|
|
|
|
static inline void count_errors(unsigned short status, struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct net_device_stats *stats = &dev->stats;
|
|
struct gfar_extra_stats *estats = &priv->extra_stats;
|
|
|
|
/* If the packet was truncated, none of the other errors
|
|
* matter */
|
|
if (status & RXBD_TRUNCATED) {
|
|
stats->rx_length_errors++;
|
|
|
|
estats->rx_trunc++;
|
|
|
|
return;
|
|
}
|
|
/* Count the errors, if there were any */
|
|
if (status & (RXBD_LARGE | RXBD_SHORT)) {
|
|
stats->rx_length_errors++;
|
|
|
|
if (status & RXBD_LARGE)
|
|
estats->rx_large++;
|
|
else
|
|
estats->rx_short++;
|
|
}
|
|
if (status & RXBD_NONOCTET) {
|
|
stats->rx_frame_errors++;
|
|
estats->rx_nonoctet++;
|
|
}
|
|
if (status & RXBD_CRCERR) {
|
|
estats->rx_crcerr++;
|
|
stats->rx_crc_errors++;
|
|
}
|
|
if (status & RXBD_OVERRUN) {
|
|
estats->rx_overrun++;
|
|
stats->rx_crc_errors++;
|
|
}
|
|
}
|
|
|
|
irqreturn_t gfar_receive(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = (struct net_device *) dev_id;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
#ifdef CONFIG_GFAR_NAPI
|
|
u32 tempval;
|
|
#else
|
|
unsigned long flags;
|
|
#endif
|
|
|
|
/* support NAPI */
|
|
#ifdef CONFIG_GFAR_NAPI
|
|
/* Clear IEVENT, so interrupts aren't called again
|
|
* because of the packets that have already arrived */
|
|
gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK);
|
|
|
|
if (netif_rx_schedule_prep(dev, &priv->napi)) {
|
|
tempval = gfar_read(&priv->regs->imask);
|
|
tempval &= IMASK_RTX_DISABLED;
|
|
gfar_write(&priv->regs->imask, tempval);
|
|
|
|
__netif_rx_schedule(dev, &priv->napi);
|
|
} else {
|
|
if (netif_msg_rx_err(priv))
|
|
printk(KERN_DEBUG "%s: receive called twice (%x)[%x]\n",
|
|
dev->name, gfar_read(&priv->regs->ievent),
|
|
gfar_read(&priv->regs->imask));
|
|
}
|
|
#else
|
|
/* Clear IEVENT, so rx interrupt isn't called again
|
|
* because of this interrupt */
|
|
gfar_write(&priv->regs->ievent, IEVENT_RX_MASK);
|
|
|
|
spin_lock_irqsave(&priv->rxlock, flags);
|
|
gfar_clean_rx_ring(dev, priv->rx_ring_size);
|
|
|
|
/* If we are coalescing interrupts, update the timer */
|
|
/* Otherwise, clear it */
|
|
if (likely(priv->rxcoalescing)) {
|
|
gfar_write(&priv->regs->rxic, 0);
|
|
gfar_write(&priv->regs->rxic,
|
|
mk_ic_value(priv->rxcount, priv->rxtime));
|
|
}
|
|
|
|
spin_unlock_irqrestore(&priv->rxlock, flags);
|
|
#endif
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static inline int gfar_rx_vlan(struct sk_buff *skb,
|
|
struct vlan_group *vlgrp, unsigned short vlctl)
|
|
{
|
|
#ifdef CONFIG_GFAR_NAPI
|
|
return vlan_hwaccel_receive_skb(skb, vlgrp, vlctl);
|
|
#else
|
|
return vlan_hwaccel_rx(skb, vlgrp, vlctl);
|
|
#endif
|
|
}
|
|
|
|
static inline void gfar_rx_checksum(struct sk_buff *skb, struct rxfcb *fcb)
|
|
{
|
|
/* If valid headers were found, and valid sums
|
|
* were verified, then we tell the kernel that no
|
|
* checksumming is necessary. Otherwise, it is */
|
|
if ((fcb->flags & RXFCB_CSUM_MASK) == (RXFCB_CIP | RXFCB_CTU))
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
else
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
}
|
|
|
|
|
|
static inline struct rxfcb *gfar_get_fcb(struct sk_buff *skb)
|
|
{
|
|
struct rxfcb *fcb = (struct rxfcb *)skb->data;
|
|
|
|
/* Remove the FCB from the skb */
|
|
skb_pull(skb, GMAC_FCB_LEN);
|
|
|
|
return fcb;
|
|
}
|
|
|
|
/* gfar_process_frame() -- handle one incoming packet if skb
|
|
* isn't NULL. */
|
|
static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb,
|
|
int length)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct rxfcb *fcb = NULL;
|
|
|
|
if (NULL == skb) {
|
|
if (netif_msg_rx_err(priv))
|
|
printk(KERN_WARNING "%s: Missing skb!!.\n", dev->name);
|
|
dev->stats.rx_dropped++;
|
|
priv->extra_stats.rx_skbmissing++;
|
|
} else {
|
|
int ret;
|
|
|
|
/* Prep the skb for the packet */
|
|
skb_put(skb, length);
|
|
|
|
/* Grab the FCB if there is one */
|
|
if (gfar_uses_fcb(priv))
|
|
fcb = gfar_get_fcb(skb);
|
|
|
|
/* Remove the padded bytes, if there are any */
|
|
if (priv->padding)
|
|
skb_pull(skb, priv->padding);
|
|
|
|
if (priv->rx_csum_enable)
|
|
gfar_rx_checksum(skb, fcb);
|
|
|
|
/* Tell the skb what kind of packet this is */
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
|
|
/* Send the packet up the stack */
|
|
if (unlikely(priv->vlgrp && (fcb->flags & RXFCB_VLN)))
|
|
ret = gfar_rx_vlan(skb, priv->vlgrp, fcb->vlctl);
|
|
else
|
|
ret = RECEIVE(skb);
|
|
|
|
if (NET_RX_DROP == ret)
|
|
priv->extra_stats.kernel_dropped++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* gfar_clean_rx_ring() -- Processes each frame in the rx ring
|
|
* until the budget/quota has been reached. Returns the number
|
|
* of frames handled
|
|
*/
|
|
int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit)
|
|
{
|
|
struct rxbd8 *bdp;
|
|
struct sk_buff *skb;
|
|
u16 pkt_len;
|
|
int howmany = 0;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
|
|
/* Get the first full descriptor */
|
|
bdp = priv->cur_rx;
|
|
|
|
while (!((bdp->status & RXBD_EMPTY) || (--rx_work_limit < 0))) {
|
|
struct sk_buff *newskb;
|
|
rmb();
|
|
|
|
/* Add another skb for the future */
|
|
newskb = gfar_new_skb(dev);
|
|
|
|
skb = priv->rx_skbuff[priv->skb_currx];
|
|
|
|
/* 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;
|
|
|
|
if (skb) {
|
|
dma_unmap_single(&priv->dev->dev,
|
|
bdp->bufPtr,
|
|
priv->rx_buffer_size,
|
|
DMA_FROM_DEVICE);
|
|
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
} else {
|
|
/* Increment the number of packets */
|
|
dev->stats.rx_packets++;
|
|
howmany++;
|
|
|
|
/* Remove the FCS from the packet length */
|
|
pkt_len = bdp->length - 4;
|
|
|
|
gfar_process_frame(dev, skb, pkt_len);
|
|
|
|
dev->stats.rx_bytes += pkt_len;
|
|
}
|
|
|
|
dev->last_rx = jiffies;
|
|
|
|
priv->rx_skbuff[priv->skb_currx] = newskb;
|
|
|
|
/* Setup the new bdp */
|
|
gfar_new_rxbdp(dev, bdp, newskb);
|
|
|
|
/* Update to the next pointer */
|
|
if (bdp->status & RXBD_WRAP)
|
|
bdp = priv->rx_bd_base;
|
|
else
|
|
bdp++;
|
|
|
|
/* update to point at the next skb */
|
|
priv->skb_currx =
|
|
(priv->skb_currx + 1) &
|
|
RX_RING_MOD_MASK(priv->rx_ring_size);
|
|
}
|
|
|
|
/* Update the current rxbd pointer to be the next one */
|
|
priv->cur_rx = bdp;
|
|
|
|
return howmany;
|
|
}
|
|
|
|
#ifdef CONFIG_GFAR_NAPI
|
|
static int gfar_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct gfar_private *priv = container_of(napi, struct gfar_private, napi);
|
|
struct net_device *dev = priv->dev;
|
|
int howmany;
|
|
unsigned long flags;
|
|
|
|
/* If we fail to get the lock, don't bother with the TX BDs */
|
|
if (spin_trylock_irqsave(&priv->txlock, flags)) {
|
|
gfar_clean_tx_ring(dev);
|
|
spin_unlock_irqrestore(&priv->txlock, flags);
|
|
}
|
|
|
|
howmany = gfar_clean_rx_ring(dev, budget);
|
|
|
|
if (howmany < budget) {
|
|
netif_rx_complete(dev, napi);
|
|
|
|
/* Clear the halt bit in RSTAT */
|
|
gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
|
|
|
|
gfar_write(&priv->regs->imask, IMASK_DEFAULT);
|
|
|
|
/* If we are coalescing interrupts, update the timer */
|
|
/* Otherwise, clear it */
|
|
if (likely(priv->rxcoalescing)) {
|
|
gfar_write(&priv->regs->rxic, 0);
|
|
gfar_write(&priv->regs->rxic,
|
|
mk_ic_value(priv->rxcount, priv->rxtime));
|
|
}
|
|
}
|
|
|
|
return howmany;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
/*
|
|
* Polling 'interrupt' - used by things like netconsole to send skbs
|
|
* without having to re-enable interrupts. It's not called while
|
|
* the interrupt routine is executing.
|
|
*/
|
|
static void gfar_netpoll(struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
|
|
/* If the device has multiple interrupts, run tx/rx */
|
|
if (priv->einfo->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
|
|
disable_irq(priv->interruptTransmit);
|
|
disable_irq(priv->interruptReceive);
|
|
disable_irq(priv->interruptError);
|
|
gfar_interrupt(priv->interruptTransmit, dev);
|
|
enable_irq(priv->interruptError);
|
|
enable_irq(priv->interruptReceive);
|
|
enable_irq(priv->interruptTransmit);
|
|
} else {
|
|
disable_irq(priv->interruptTransmit);
|
|
gfar_interrupt(priv->interruptTransmit, dev);
|
|
enable_irq(priv->interruptTransmit);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* The interrupt handler for devices with one interrupt */
|
|
static irqreturn_t gfar_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
|
|
/* Save ievent for future reference */
|
|
u32 events = gfar_read(&priv->regs->ievent);
|
|
|
|
/* Check for reception */
|
|
if (events & IEVENT_RX_MASK)
|
|
gfar_receive(irq, dev_id);
|
|
|
|
/* Check for transmit completion */
|
|
if (events & IEVENT_TX_MASK)
|
|
gfar_transmit(irq, dev_id);
|
|
|
|
/* Check for errors */
|
|
if (events & IEVENT_ERR_MASK)
|
|
gfar_error(irq, dev_id);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* Called every time the controller might need to be made
|
|
* aware of new link state. The PHY code conveys this
|
|
* information through variables in the phydev structure, and this
|
|
* function converts those variables into the appropriate
|
|
* register values, and can bring down the device if needed.
|
|
*/
|
|
static void adjust_link(struct net_device *dev)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct gfar __iomem *regs = priv->regs;
|
|
unsigned long flags;
|
|
struct phy_device *phydev = priv->phydev;
|
|
int new_state = 0;
|
|
|
|
spin_lock_irqsave(&priv->txlock, flags);
|
|
if (phydev->link) {
|
|
u32 tempval = gfar_read(®s->maccfg2);
|
|
u32 ecntrl = gfar_read(®s->ecntrl);
|
|
|
|
/* Now we make sure that we can be in full duplex mode.
|
|
* If not, we operate in half-duplex mode. */
|
|
if (phydev->duplex != priv->oldduplex) {
|
|
new_state = 1;
|
|
if (!(phydev->duplex))
|
|
tempval &= ~(MACCFG2_FULL_DUPLEX);
|
|
else
|
|
tempval |= MACCFG2_FULL_DUPLEX;
|
|
|
|
priv->oldduplex = phydev->duplex;
|
|
}
|
|
|
|
if (phydev->speed != priv->oldspeed) {
|
|
new_state = 1;
|
|
switch (phydev->speed) {
|
|
case 1000:
|
|
tempval =
|
|
((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
|
|
break;
|
|
case 100:
|
|
case 10:
|
|
tempval =
|
|
((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
|
|
|
|
/* Reduced mode distinguishes
|
|
* between 10 and 100 */
|
|
if (phydev->speed == SPEED_100)
|
|
ecntrl |= ECNTRL_R100;
|
|
else
|
|
ecntrl &= ~(ECNTRL_R100);
|
|
break;
|
|
default:
|
|
if (netif_msg_link(priv))
|
|
printk(KERN_WARNING
|
|
"%s: Ack! Speed (%d) is not 10/100/1000!\n",
|
|
dev->name, phydev->speed);
|
|
break;
|
|
}
|
|
|
|
priv->oldspeed = phydev->speed;
|
|
}
|
|
|
|
gfar_write(®s->maccfg2, tempval);
|
|
gfar_write(®s->ecntrl, ecntrl);
|
|
|
|
if (!priv->oldlink) {
|
|
new_state = 1;
|
|
priv->oldlink = 1;
|
|
netif_schedule(dev);
|
|
}
|
|
} else if (priv->oldlink) {
|
|
new_state = 1;
|
|
priv->oldlink = 0;
|
|
priv->oldspeed = 0;
|
|
priv->oldduplex = -1;
|
|
}
|
|
|
|
if (new_state && netif_msg_link(priv))
|
|
phy_print_status(phydev);
|
|
|
|
spin_unlock_irqrestore(&priv->txlock, flags);
|
|
}
|
|
|
|
/* Update the hash table based on the current list of multicast
|
|
* addresses we subscribe to. Also, change the promiscuity of
|
|
* the device based on the flags (this function is called
|
|
* whenever dev->flags is changed */
|
|
static void gfar_set_multi(struct net_device *dev)
|
|
{
|
|
struct dev_mc_list *mc_ptr;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
struct gfar __iomem *regs = priv->regs;
|
|
u32 tempval;
|
|
|
|
if(dev->flags & IFF_PROMISC) {
|
|
/* Set RCTRL to PROM */
|
|
tempval = gfar_read(®s->rctrl);
|
|
tempval |= RCTRL_PROM;
|
|
gfar_write(®s->rctrl, tempval);
|
|
} else {
|
|
/* Set RCTRL to not PROM */
|
|
tempval = gfar_read(®s->rctrl);
|
|
tempval &= ~(RCTRL_PROM);
|
|
gfar_write(®s->rctrl, tempval);
|
|
}
|
|
|
|
if(dev->flags & IFF_ALLMULTI) {
|
|
/* Set the hash to rx all multicast frames */
|
|
gfar_write(®s->igaddr0, 0xffffffff);
|
|
gfar_write(®s->igaddr1, 0xffffffff);
|
|
gfar_write(®s->igaddr2, 0xffffffff);
|
|
gfar_write(®s->igaddr3, 0xffffffff);
|
|
gfar_write(®s->igaddr4, 0xffffffff);
|
|
gfar_write(®s->igaddr5, 0xffffffff);
|
|
gfar_write(®s->igaddr6, 0xffffffff);
|
|
gfar_write(®s->igaddr7, 0xffffffff);
|
|
gfar_write(®s->gaddr0, 0xffffffff);
|
|
gfar_write(®s->gaddr1, 0xffffffff);
|
|
gfar_write(®s->gaddr2, 0xffffffff);
|
|
gfar_write(®s->gaddr3, 0xffffffff);
|
|
gfar_write(®s->gaddr4, 0xffffffff);
|
|
gfar_write(®s->gaddr5, 0xffffffff);
|
|
gfar_write(®s->gaddr6, 0xffffffff);
|
|
gfar_write(®s->gaddr7, 0xffffffff);
|
|
} else {
|
|
int em_num;
|
|
int idx;
|
|
|
|
/* zero out the hash */
|
|
gfar_write(®s->igaddr0, 0x0);
|
|
gfar_write(®s->igaddr1, 0x0);
|
|
gfar_write(®s->igaddr2, 0x0);
|
|
gfar_write(®s->igaddr3, 0x0);
|
|
gfar_write(®s->igaddr4, 0x0);
|
|
gfar_write(®s->igaddr5, 0x0);
|
|
gfar_write(®s->igaddr6, 0x0);
|
|
gfar_write(®s->igaddr7, 0x0);
|
|
gfar_write(®s->gaddr0, 0x0);
|
|
gfar_write(®s->gaddr1, 0x0);
|
|
gfar_write(®s->gaddr2, 0x0);
|
|
gfar_write(®s->gaddr3, 0x0);
|
|
gfar_write(®s->gaddr4, 0x0);
|
|
gfar_write(®s->gaddr5, 0x0);
|
|
gfar_write(®s->gaddr6, 0x0);
|
|
gfar_write(®s->gaddr7, 0x0);
|
|
|
|
/* If we have extended hash tables, we need to
|
|
* clear the exact match registers to prepare for
|
|
* setting them */
|
|
if (priv->extended_hash) {
|
|
em_num = GFAR_EM_NUM + 1;
|
|
gfar_clear_exact_match(dev);
|
|
idx = 1;
|
|
} else {
|
|
idx = 0;
|
|
em_num = 0;
|
|
}
|
|
|
|
if(dev->mc_count == 0)
|
|
return;
|
|
|
|
/* Parse the list, and set the appropriate bits */
|
|
for(mc_ptr = dev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
|
|
if (idx < em_num) {
|
|
gfar_set_mac_for_addr(dev, idx,
|
|
mc_ptr->dmi_addr);
|
|
idx++;
|
|
} else
|
|
gfar_set_hash_for_addr(dev, mc_ptr->dmi_addr);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/* Clears each of the exact match registers to zero, so they
|
|
* don't interfere with normal reception */
|
|
static void gfar_clear_exact_match(struct net_device *dev)
|
|
{
|
|
int idx;
|
|
u8 zero_arr[MAC_ADDR_LEN] = {0,0,0,0,0,0};
|
|
|
|
for(idx = 1;idx < GFAR_EM_NUM + 1;idx++)
|
|
gfar_set_mac_for_addr(dev, idx, (u8 *)zero_arr);
|
|
}
|
|
|
|
/* Set the appropriate hash bit for the given addr */
|
|
/* The algorithm works like so:
|
|
* 1) Take the Destination Address (ie the multicast address), and
|
|
* do a CRC on it (little endian), and reverse the bits of the
|
|
* result.
|
|
* 2) Use the 8 most significant bits as a hash into a 256-entry
|
|
* table. The table is controlled through 8 32-bit registers:
|
|
* gaddr0-7. gaddr0's MSB is entry 0, and gaddr7's LSB is
|
|
* gaddr7. This means that the 3 most significant bits in the
|
|
* hash index which gaddr register to use, and the 5 other bits
|
|
* indicate which bit (assuming an IBM numbering scheme, which
|
|
* for PowerPC (tm) is usually the case) in the register holds
|
|
* the entry. */
|
|
static void gfar_set_hash_for_addr(struct net_device *dev, u8 *addr)
|
|
{
|
|
u32 tempval;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
u32 result = ether_crc(MAC_ADDR_LEN, addr);
|
|
int width = priv->hash_width;
|
|
u8 whichbit = (result >> (32 - width)) & 0x1f;
|
|
u8 whichreg = result >> (32 - width + 5);
|
|
u32 value = (1 << (31-whichbit));
|
|
|
|
tempval = gfar_read(priv->hash_regs[whichreg]);
|
|
tempval |= value;
|
|
gfar_write(priv->hash_regs[whichreg], tempval);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/* There are multiple MAC Address register pairs on some controllers
|
|
* This function sets the numth pair to a given address
|
|
*/
|
|
static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr)
|
|
{
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
int idx;
|
|
char tmpbuf[MAC_ADDR_LEN];
|
|
u32 tempval;
|
|
u32 __iomem *macptr = &priv->regs->macstnaddr1;
|
|
|
|
macptr += num*2;
|
|
|
|
/* Now copy it into the mac registers backwards, cuz */
|
|
/* little endian is silly */
|
|
for (idx = 0; idx < MAC_ADDR_LEN; idx++)
|
|
tmpbuf[MAC_ADDR_LEN - 1 - idx] = addr[idx];
|
|
|
|
gfar_write(macptr, *((u32 *) (tmpbuf)));
|
|
|
|
tempval = *((u32 *) (tmpbuf + 4));
|
|
|
|
gfar_write(macptr+1, tempval);
|
|
}
|
|
|
|
/* GFAR error interrupt handler */
|
|
static irqreturn_t gfar_error(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
struct gfar_private *priv = netdev_priv(dev);
|
|
|
|
/* Save ievent for future reference */
|
|
u32 events = gfar_read(&priv->regs->ievent);
|
|
|
|
/* Clear IEVENT */
|
|
gfar_write(&priv->regs->ievent, IEVENT_ERR_MASK);
|
|
|
|
/* Hmm... */
|
|
if (netif_msg_rx_err(priv) || netif_msg_tx_err(priv))
|
|
printk(KERN_DEBUG "%s: error interrupt (ievent=0x%08x imask=0x%08x)\n",
|
|
dev->name, events, gfar_read(&priv->regs->imask));
|
|
|
|
/* Update the error counters */
|
|
if (events & IEVENT_TXE) {
|
|
dev->stats.tx_errors++;
|
|
|
|
if (events & IEVENT_LC)
|
|
dev->stats.tx_window_errors++;
|
|
if (events & IEVENT_CRL)
|
|
dev->stats.tx_aborted_errors++;
|
|
if (events & IEVENT_XFUN) {
|
|
if (netif_msg_tx_err(priv))
|
|
printk(KERN_DEBUG "%s: TX FIFO underrun, "
|
|
"packet dropped.\n", dev->name);
|
|
dev->stats.tx_dropped++;
|
|
priv->extra_stats.tx_underrun++;
|
|
|
|
/* Reactivate the Tx Queues */
|
|
gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
|
|
}
|
|
if (netif_msg_tx_err(priv))
|
|
printk(KERN_DEBUG "%s: Transmit Error\n", dev->name);
|
|
}
|
|
if (events & IEVENT_BSY) {
|
|
dev->stats.rx_errors++;
|
|
priv->extra_stats.rx_bsy++;
|
|
|
|
gfar_receive(irq, dev_id);
|
|
|
|
#ifndef CONFIG_GFAR_NAPI
|
|
/* Clear the halt bit in RSTAT */
|
|
gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
|
|
#endif
|
|
|
|
if (netif_msg_rx_err(priv))
|
|
printk(KERN_DEBUG "%s: busy error (rstat: %x)\n",
|
|
dev->name, gfar_read(&priv->regs->rstat));
|
|
}
|
|
if (events & IEVENT_BABR) {
|
|
dev->stats.rx_errors++;
|
|
priv->extra_stats.rx_babr++;
|
|
|
|
if (netif_msg_rx_err(priv))
|
|
printk(KERN_DEBUG "%s: babbling RX error\n", dev->name);
|
|
}
|
|
if (events & IEVENT_EBERR) {
|
|
priv->extra_stats.eberr++;
|
|
if (netif_msg_rx_err(priv))
|
|
printk(KERN_DEBUG "%s: bus error\n", dev->name);
|
|
}
|
|
if ((events & IEVENT_RXC) && netif_msg_rx_status(priv))
|
|
printk(KERN_DEBUG "%s: control frame\n", dev->name);
|
|
|
|
if (events & IEVENT_BABT) {
|
|
priv->extra_stats.tx_babt++;
|
|
if (netif_msg_tx_err(priv))
|
|
printk(KERN_DEBUG "%s: babbling TX error\n", dev->name);
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* work with hotplug and coldplug */
|
|
MODULE_ALIAS("platform:fsl-gianfar");
|
|
|
|
/* Structure for a device driver */
|
|
static struct platform_driver gfar_driver = {
|
|
.probe = gfar_probe,
|
|
.remove = gfar_remove,
|
|
.driver = {
|
|
.name = "fsl-gianfar",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init gfar_init(void)
|
|
{
|
|
int err = gfar_mdio_init();
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
err = platform_driver_register(&gfar_driver);
|
|
|
|
if (err)
|
|
gfar_mdio_exit();
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit gfar_exit(void)
|
|
{
|
|
platform_driver_unregister(&gfar_driver);
|
|
gfar_mdio_exit();
|
|
}
|
|
|
|
module_init(gfar_init);
|
|
module_exit(gfar_exit);
|
|
|