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-rw-r--r--drivers/net/meth.c855
1 files changed, 0 insertions, 855 deletions
diff --git a/drivers/net/meth.c b/drivers/net/meth.c
deleted file mode 100644
index 60135aa55802..000000000000
--- a/drivers/net/meth.c
+++ /dev/null
@@ -1,855 +0,0 @@
-/*
- * meth.c -- O2 Builtin 10/100 Ethernet driver
- *
- * Copyright (C) 2001-2003 Ilya Volynets
- *
- * 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.
- */
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/interrupt.h>
-
-#include <linux/in.h>
-#include <linux/in6.h>
-#include <linux/device.h> /* struct device, et al */
-#include <linux/netdevice.h> /* struct device, and other headers */
-#include <linux/etherdevice.h> /* eth_type_trans */
-#include <linux/ip.h> /* struct iphdr */
-#include <linux/tcp.h> /* struct tcphdr */
-#include <linux/skbuff.h>
-#include <linux/mii.h> /* MII definitions */
-
-#include <asm/ip32/mace.h>
-#include <asm/ip32/ip32_ints.h>
-
-#include <asm/io.h>
-
-#include "meth.h"
-
-#ifndef MFE_DEBUG
-#define MFE_DEBUG 0
-#endif
-
-#if MFE_DEBUG>=1
-#define DPRINTK(str,args...) printk(KERN_DEBUG "meth: %s: " str, __func__ , ## args)
-#define MFE_RX_DEBUG 2
-#else
-#define DPRINTK(str,args...)
-#define MFE_RX_DEBUG 0
-#endif
-
-
-static const char *meth_str="SGI O2 Fast Ethernet";
-
-/* The maximum time waited (in jiffies) before assuming a Tx failed. (400ms) */
-#define TX_TIMEOUT (400*HZ/1000)
-
-static int timeout = TX_TIMEOUT;
-module_param(timeout, int, 0);
-
-/*
- * This structure is private to each device. It is used to pass
- * packets in and out, so there is place for a packet
- */
-struct meth_private {
- /* in-memory copy of MAC Control register */
- unsigned long mac_ctrl;
- /* in-memory copy of DMA Control register */
- unsigned long dma_ctrl;
- /* address of PHY, used by mdio_* functions, initialized in mdio_probe */
- unsigned long phy_addr;
- tx_packet *tx_ring;
- dma_addr_t tx_ring_dma;
- struct sk_buff *tx_skbs[TX_RING_ENTRIES];
- dma_addr_t tx_skb_dmas[TX_RING_ENTRIES];
- unsigned long tx_read, tx_write, tx_count;
-
- rx_packet *rx_ring[RX_RING_ENTRIES];
- dma_addr_t rx_ring_dmas[RX_RING_ENTRIES];
- struct sk_buff *rx_skbs[RX_RING_ENTRIES];
- unsigned long rx_write;
-
- spinlock_t meth_lock;
-};
-
-static void meth_tx_timeout(struct net_device *dev);
-static irqreturn_t meth_interrupt(int irq, void *dev_id);
-
-/* global, initialized in ip32-setup.c */
-char o2meth_eaddr[8]={0,0,0,0,0,0,0,0};
-
-static inline void load_eaddr(struct net_device *dev)
-{
- int i;
- u64 macaddr;
-
- DPRINTK("Loading MAC Address: %pM\n", dev->dev_addr);
- macaddr = 0;
- for (i = 0; i < 6; i++)
- macaddr |= (u64)dev->dev_addr[i] << ((5 - i) * 8);
-
- mace->eth.mac_addr = macaddr;
-}
-
-/*
- * Waits for BUSY status of mdio bus to clear
- */
-#define WAIT_FOR_PHY(___rval) \
- while ((___rval = mace->eth.phy_data) & MDIO_BUSY) { \
- udelay(25); \
- }
-/*read phy register, return value read */
-static unsigned long mdio_read(struct meth_private *priv, unsigned long phyreg)
-{
- unsigned long rval;
- WAIT_FOR_PHY(rval);
- mace->eth.phy_regs = (priv->phy_addr << 5) | (phyreg & 0x1f);
- udelay(25);
- mace->eth.phy_trans_go = 1;
- udelay(25);
- WAIT_FOR_PHY(rval);
- return rval & MDIO_DATA_MASK;
-}
-
-static int mdio_probe(struct meth_private *priv)
-{
- int i;
- unsigned long p2, p3, flags;
- /* check if phy is detected already */
- if(priv->phy_addr>=0&&priv->phy_addr<32)
- return 0;
- spin_lock_irqsave(&priv->meth_lock, flags);
- for (i=0;i<32;++i){
- priv->phy_addr=i;
- p2=mdio_read(priv,2);
- p3=mdio_read(priv,3);
-#if MFE_DEBUG>=2
- switch ((p2<<12)|(p3>>4)){
- case PHY_QS6612X:
- DPRINTK("PHY is QS6612X\n");
- break;
- case PHY_ICS1889:
- DPRINTK("PHY is ICS1889\n");
- break;
- case PHY_ICS1890:
- DPRINTK("PHY is ICS1890\n");
- break;
- case PHY_DP83840:
- DPRINTK("PHY is DP83840\n");
- break;
- }
-#endif
- if(p2!=0xffff&&p2!=0x0000){
- DPRINTK("PHY code: %x\n",(p2<<12)|(p3>>4));
- break;
- }
- }
- spin_unlock_irqrestore(&priv->meth_lock, flags);
- if(priv->phy_addr<32) {
- return 0;
- }
- DPRINTK("Oopsie! PHY is not known!\n");
- priv->phy_addr=-1;
- return -ENODEV;
-}
-
-static void meth_check_link(struct net_device *dev)
-{
- struct meth_private *priv = netdev_priv(dev);
- unsigned long mii_advertising = mdio_read(priv, 4);
- unsigned long mii_partner = mdio_read(priv, 5);
- unsigned long negotiated = mii_advertising & mii_partner;
- unsigned long duplex, speed;
-
- if (mii_partner == 0xffff)
- return;
-
- speed = (negotiated & 0x0380) ? METH_100MBIT : 0;
- duplex = ((negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040) ?
- METH_PHY_FDX : 0;
-
- if ((priv->mac_ctrl & METH_PHY_FDX) ^ duplex) {
- DPRINTK("Setting %s-duplex\n", duplex ? "full" : "half");
- if (duplex)
- priv->mac_ctrl |= METH_PHY_FDX;
- else
- priv->mac_ctrl &= ~METH_PHY_FDX;
- mace->eth.mac_ctrl = priv->mac_ctrl;
- }
-
- if ((priv->mac_ctrl & METH_100MBIT) ^ speed) {
- DPRINTK("Setting %dMbs mode\n", speed ? 100 : 10);
- if (duplex)
- priv->mac_ctrl |= METH_100MBIT;
- else
- priv->mac_ctrl &= ~METH_100MBIT;
- mace->eth.mac_ctrl = priv->mac_ctrl;
- }
-}
-
-
-static int meth_init_tx_ring(struct meth_private *priv)
-{
- /* Init TX ring */
- priv->tx_ring = dma_alloc_coherent(NULL, TX_RING_BUFFER_SIZE,
- &priv->tx_ring_dma, GFP_ATOMIC);
- if (!priv->tx_ring)
- return -ENOMEM;
- memset(priv->tx_ring, 0, TX_RING_BUFFER_SIZE);
- priv->tx_count = priv->tx_read = priv->tx_write = 0;
- mace->eth.tx_ring_base = priv->tx_ring_dma;
- /* Now init skb save area */
- memset(priv->tx_skbs, 0, sizeof(priv->tx_skbs));
- memset(priv->tx_skb_dmas, 0, sizeof(priv->tx_skb_dmas));
- return 0;
-}
-
-static int meth_init_rx_ring(struct meth_private *priv)
-{
- int i;
-
- for (i = 0; i < RX_RING_ENTRIES; i++) {
- priv->rx_skbs[i] = alloc_skb(METH_RX_BUFF_SIZE, 0);
- /* 8byte status vector + 3quad padding + 2byte padding,
- * to put data on 64bit aligned boundary */
- skb_reserve(priv->rx_skbs[i],METH_RX_HEAD);
- priv->rx_ring[i]=(rx_packet*)(priv->rx_skbs[i]->head);
- /* I'll need to re-sync it after each RX */
- priv->rx_ring_dmas[i] =
- dma_map_single(NULL, priv->rx_ring[i],
- METH_RX_BUFF_SIZE, DMA_FROM_DEVICE);
- mace->eth.rx_fifo = priv->rx_ring_dmas[i];
- }
- priv->rx_write = 0;
- return 0;
-}
-static void meth_free_tx_ring(struct meth_private *priv)
-{
- int i;
-
- /* Remove any pending skb */
- for (i = 0; i < TX_RING_ENTRIES; i++) {
- if (priv->tx_skbs[i])
- dev_kfree_skb(priv->tx_skbs[i]);
- priv->tx_skbs[i] = NULL;
- }
- dma_free_coherent(NULL, TX_RING_BUFFER_SIZE, priv->tx_ring,
- priv->tx_ring_dma);
-}
-
-/* Presumes RX DMA engine is stopped, and RX fifo ring is reset */
-static void meth_free_rx_ring(struct meth_private *priv)
-{
- int i;
-
- for (i = 0; i < RX_RING_ENTRIES; i++) {
- dma_unmap_single(NULL, priv->rx_ring_dmas[i],
- METH_RX_BUFF_SIZE, DMA_FROM_DEVICE);
- priv->rx_ring[i] = 0;
- priv->rx_ring_dmas[i] = 0;
- kfree_skb(priv->rx_skbs[i]);
- }
-}
-
-int meth_reset(struct net_device *dev)
-{
- struct meth_private *priv = netdev_priv(dev);
-
- /* Reset card */
- mace->eth.mac_ctrl = SGI_MAC_RESET;
- udelay(1);
- mace->eth.mac_ctrl = 0;
- udelay(25);
-
- /* Load ethernet address */
- load_eaddr(dev);
- /* Should load some "errata", but later */
-
- /* Check for device */
- if (mdio_probe(priv) < 0) {
- DPRINTK("Unable to find PHY\n");
- return -ENODEV;
- }
-
- /* Initial mode: 10 | Half-duplex | Accept normal packets */
- priv->mac_ctrl = METH_ACCEPT_MCAST | METH_DEFAULT_IPG;
- if (dev->flags & IFF_PROMISC)
- priv->mac_ctrl |= METH_PROMISC;
- mace->eth.mac_ctrl = priv->mac_ctrl;
-
- /* Autonegotiate speed and duplex mode */
- meth_check_link(dev);
-
- /* Now set dma control, but don't enable DMA, yet */
- priv->dma_ctrl = (4 << METH_RX_OFFSET_SHIFT) |
- (RX_RING_ENTRIES << METH_RX_DEPTH_SHIFT);
- mace->eth.dma_ctrl = priv->dma_ctrl;
-
- return 0;
-}
-
-/*============End Helper Routines=====================*/
-
-/*
- * Open and close
- */
-static int meth_open(struct net_device *dev)
-{
- struct meth_private *priv = netdev_priv(dev);
- int ret;
-
- priv->phy_addr = -1; /* No PHY is known yet... */
-
- /* Initialize the hardware */
- ret = meth_reset(dev);
- if (ret < 0)
- return ret;
-
- /* Allocate the ring buffers */
- ret = meth_init_tx_ring(priv);
- if (ret < 0)
- return ret;
- ret = meth_init_rx_ring(priv);
- if (ret < 0)
- goto out_free_tx_ring;
-
- ret = request_irq(dev->irq, meth_interrupt, 0, meth_str, dev);
- if (ret) {
- printk(KERN_ERR "%s: Can't get irq %d\n", dev->name, dev->irq);
- goto out_free_rx_ring;
- }
-
- /* Start DMA */
- priv->dma_ctrl |= METH_DMA_TX_EN | /*METH_DMA_TX_INT_EN |*/
- METH_DMA_RX_EN | METH_DMA_RX_INT_EN;
- mace->eth.dma_ctrl = priv->dma_ctrl;
-
- DPRINTK("About to start queue\n");
- netif_start_queue(dev);
-
- return 0;
-
-out_free_rx_ring:
- meth_free_rx_ring(priv);
-out_free_tx_ring:
- meth_free_tx_ring(priv);
-
- return ret;
-}
-
-static int meth_release(struct net_device *dev)
-{
- struct meth_private *priv = netdev_priv(dev);
-
- DPRINTK("Stopping queue\n");
- netif_stop_queue(dev); /* can't transmit any more */
- /* shut down DMA */
- priv->dma_ctrl &= ~(METH_DMA_TX_EN | METH_DMA_TX_INT_EN |
- METH_DMA_RX_EN | METH_DMA_RX_INT_EN);
- mace->eth.dma_ctrl = priv->dma_ctrl;
- free_irq(dev->irq, dev);
- meth_free_tx_ring(priv);
- meth_free_rx_ring(priv);
-
- return 0;
-}
-
-/*
- * Receive a packet: retrieve, encapsulate and pass over to upper levels
- */
-static void meth_rx(struct net_device* dev, unsigned long int_status)
-{
- struct sk_buff *skb;
- unsigned long status, flags;
- struct meth_private *priv = netdev_priv(dev);
- unsigned long fifo_rptr = (int_status & METH_INT_RX_RPTR_MASK) >> 8;
-
- spin_lock_irqsave(&priv->meth_lock, flags);
- priv->dma_ctrl &= ~METH_DMA_RX_INT_EN;
- mace->eth.dma_ctrl = priv->dma_ctrl;
- spin_unlock_irqrestore(&priv->meth_lock, flags);
-
- if (int_status & METH_INT_RX_UNDERFLOW) {
- fifo_rptr = (fifo_rptr - 1) & 0x0f;
- }
- while (priv->rx_write != fifo_rptr) {
- dma_unmap_single(NULL, priv->rx_ring_dmas[priv->rx_write],
- METH_RX_BUFF_SIZE, DMA_FROM_DEVICE);
- status = priv->rx_ring[priv->rx_write]->status.raw;
-#if MFE_DEBUG
- if (!(status & METH_RX_ST_VALID)) {
- DPRINTK("Not received? status=%016lx\n",status);
- }
-#endif
- if ((!(status & METH_RX_STATUS_ERRORS)) && (status & METH_RX_ST_VALID)) {
- int len = (status & 0xffff) - 4; /* omit CRC */
- /* length sanity check */
- if (len < 60 || len > 1518) {
- printk(KERN_DEBUG "%s: bogus packet size: %ld, status=%#2Lx.\n",
- dev->name, priv->rx_write,
- priv->rx_ring[priv->rx_write]->status.raw);
- dev->stats.rx_errors++;
- dev->stats.rx_length_errors++;
- skb = priv->rx_skbs[priv->rx_write];
- } else {
- skb = alloc_skb(METH_RX_BUFF_SIZE, GFP_ATOMIC);
- if (!skb) {
- /* Ouch! No memory! Drop packet on the floor */
- DPRINTK("No mem: dropping packet\n");
- dev->stats.rx_dropped++;
- skb = priv->rx_skbs[priv->rx_write];
- } else {
- struct sk_buff *skb_c = priv->rx_skbs[priv->rx_write];
- /* 8byte status vector + 3quad padding + 2byte padding,
- * to put data on 64bit aligned boundary */
- skb_reserve(skb, METH_RX_HEAD);
- /* Write metadata, and then pass to the receive level */
- skb_put(skb_c, len);
- priv->rx_skbs[priv->rx_write] = skb;
- skb_c->protocol = eth_type_trans(skb_c, dev);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += len;
- netif_rx(skb_c);
- }
- }
- } else {
- dev->stats.rx_errors++;
- skb=priv->rx_skbs[priv->rx_write];
-#if MFE_DEBUG>0
- printk(KERN_WARNING "meth: RX error: status=0x%016lx\n",status);
- if(status&METH_RX_ST_RCV_CODE_VIOLATION)
- printk(KERN_WARNING "Receive Code Violation\n");
- if(status&METH_RX_ST_CRC_ERR)
- printk(KERN_WARNING "CRC error\n");
- if(status&METH_RX_ST_INV_PREAMBLE_CTX)
- printk(KERN_WARNING "Invalid Preamble Context\n");
- if(status&METH_RX_ST_LONG_EVT_SEEN)
- printk(KERN_WARNING "Long Event Seen...\n");
- if(status&METH_RX_ST_BAD_PACKET)
- printk(KERN_WARNING "Bad Packet\n");
- if(status&METH_RX_ST_CARRIER_EVT_SEEN)
- printk(KERN_WARNING "Carrier Event Seen\n");
-#endif
- }
- priv->rx_ring[priv->rx_write] = (rx_packet*)skb->head;
- priv->rx_ring[priv->rx_write]->status.raw = 0;
- priv->rx_ring_dmas[priv->rx_write] =
- dma_map_single(NULL, priv->rx_ring[priv->rx_write],
- METH_RX_BUFF_SIZE, DMA_FROM_DEVICE);
- mace->eth.rx_fifo = priv->rx_ring_dmas[priv->rx_write];
- ADVANCE_RX_PTR(priv->rx_write);
- }
- spin_lock_irqsave(&priv->meth_lock, flags);
- /* In case there was underflow, and Rx DMA was disabled */
- priv->dma_ctrl |= METH_DMA_RX_INT_EN | METH_DMA_RX_EN;
- mace->eth.dma_ctrl = priv->dma_ctrl;
- mace->eth.int_stat = METH_INT_RX_THRESHOLD;
- spin_unlock_irqrestore(&priv->meth_lock, flags);
-}
-
-static int meth_tx_full(struct net_device *dev)
-{
- struct meth_private *priv = netdev_priv(dev);
-
- return priv->tx_count >= TX_RING_ENTRIES - 1;
-}
-
-static void meth_tx_cleanup(struct net_device* dev, unsigned long int_status)
-{
- struct meth_private *priv = netdev_priv(dev);
- unsigned long status, flags;
- struct sk_buff *skb;
- unsigned long rptr = (int_status&TX_INFO_RPTR) >> 16;
-
- spin_lock_irqsave(&priv->meth_lock, flags);
-
- /* Stop DMA notification */
- priv->dma_ctrl &= ~(METH_DMA_TX_INT_EN);
- mace->eth.dma_ctrl = priv->dma_ctrl;
-
- while (priv->tx_read != rptr) {
- skb = priv->tx_skbs[priv->tx_read];
- status = priv->tx_ring[priv->tx_read].header.raw;
-#if MFE_DEBUG>=1
- if (priv->tx_read == priv->tx_write)
- DPRINTK("Auchi! tx_read=%d,tx_write=%d,rptr=%d?\n", priv->tx_read, priv->tx_write,rptr);
-#endif
- if (status & METH_TX_ST_DONE) {
- if (status & METH_TX_ST_SUCCESS){
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += skb->len;
- } else {
- dev->stats.tx_errors++;
-#if MFE_DEBUG>=1
- DPRINTK("TX error: status=%016lx <",status);
- if(status & METH_TX_ST_SUCCESS)
- printk(" SUCCESS");
- if(status & METH_TX_ST_TOOLONG)
- printk(" TOOLONG");
- if(status & METH_TX_ST_UNDERRUN)
- printk(" UNDERRUN");
- if(status & METH_TX_ST_EXCCOLL)
- printk(" EXCCOLL");
- if(status & METH_TX_ST_DEFER)
- printk(" DEFER");
- if(status & METH_TX_ST_LATECOLL)
- printk(" LATECOLL");
- printk(" >\n");
-#endif
- }
- } else {
- DPRINTK("RPTR points us here, but packet not done?\n");
- break;
- }
- dev_kfree_skb_irq(skb);
- priv->tx_skbs[priv->tx_read] = NULL;
- priv->tx_ring[priv->tx_read].header.raw = 0;
- priv->tx_read = (priv->tx_read+1)&(TX_RING_ENTRIES-1);
- priv->tx_count--;
- }
-
- /* wake up queue if it was stopped */
- if (netif_queue_stopped(dev) && !meth_tx_full(dev)) {
- netif_wake_queue(dev);
- }
-
- mace->eth.int_stat = METH_INT_TX_EMPTY | METH_INT_TX_PKT;
- spin_unlock_irqrestore(&priv->meth_lock, flags);
-}
-
-static void meth_error(struct net_device* dev, unsigned status)
-{
- struct meth_private *priv = netdev_priv(dev);
- unsigned long flags;
-
- printk(KERN_WARNING "meth: error status: 0x%08x\n",status);
- /* check for errors too... */
- if (status & (METH_INT_TX_LINK_FAIL))
- printk(KERN_WARNING "meth: link failure\n");
- /* Should I do full reset in this case? */
- if (status & (METH_INT_MEM_ERROR))
- printk(KERN_WARNING "meth: memory error\n");
- if (status & (METH_INT_TX_ABORT))
- printk(KERN_WARNING "meth: aborted\n");
- if (status & (METH_INT_RX_OVERFLOW))
- printk(KERN_WARNING "meth: Rx overflow\n");
- if (status & (METH_INT_RX_UNDERFLOW)) {
- printk(KERN_WARNING "meth: Rx underflow\n");
- spin_lock_irqsave(&priv->meth_lock, flags);
- mace->eth.int_stat = METH_INT_RX_UNDERFLOW;
- /* more underflow interrupts will be delivered,
- * effectively throwing us into an infinite loop.
- * Thus I stop processing Rx in this case. */
- priv->dma_ctrl &= ~METH_DMA_RX_EN;
- mace->eth.dma_ctrl = priv->dma_ctrl;
- DPRINTK("Disabled meth Rx DMA temporarily\n");
- spin_unlock_irqrestore(&priv->meth_lock, flags);
- }
- mace->eth.int_stat = METH_INT_ERROR;
-}
-
-/*
- * The typical interrupt entry point
- */
-static irqreturn_t meth_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *)dev_id;
- struct meth_private *priv = netdev_priv(dev);
- unsigned long status;
-
- status = mace->eth.int_stat;
- while (status & 0xff) {
- /* First handle errors - if we get Rx underflow,
- * Rx DMA will be disabled, and Rx handler will reenable
- * it. I don't think it's possible to get Rx underflow,
- * without getting Rx interrupt */
- if (status & METH_INT_ERROR) {
- meth_error(dev, status);
- }
- if (status & (METH_INT_TX_EMPTY | METH_INT_TX_PKT)) {
- /* a transmission is over: free the skb */
- meth_tx_cleanup(dev, status);
- }
- if (status & METH_INT_RX_THRESHOLD) {
- if (!(priv->dma_ctrl & METH_DMA_RX_INT_EN))
- break;
- /* send it to meth_rx for handling */
- meth_rx(dev, status);
- }
- status = mace->eth.int_stat;
- }
-
- return IRQ_HANDLED;
-}
-
-/*
- * Transmits packets that fit into TX descriptor (are <=120B)
- */
-static void meth_tx_short_prepare(struct meth_private *priv,
- struct sk_buff *skb)
-{
- tx_packet *desc = &priv->tx_ring[priv->tx_write];
- int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
-
- desc->header.raw = METH_TX_CMD_INT_EN | (len-1) | ((128-len) << 16);
- /* maybe I should set whole thing to 0 first... */
- skb_copy_from_linear_data(skb, desc->data.dt + (120 - len), skb->len);
- if (skb->len < len)
- memset(desc->data.dt + 120 - len + skb->len, 0, len-skb->len);
-}
-#define TX_CATBUF1 BIT(25)
-static void meth_tx_1page_prepare(struct meth_private *priv,
- struct sk_buff *skb)
-{
- tx_packet *desc = &priv->tx_ring[priv->tx_write];
- void *buffer_data = (void *)(((unsigned long)skb->data + 7) & ~7);
- int unaligned_len = (int)((unsigned long)buffer_data - (unsigned long)skb->data);
- int buffer_len = skb->len - unaligned_len;
- dma_addr_t catbuf;
-
- desc->header.raw = METH_TX_CMD_INT_EN | TX_CATBUF1 | (skb->len - 1);
-
- /* unaligned part */
- if (unaligned_len) {
- skb_copy_from_linear_data(skb, desc->data.dt + (120 - unaligned_len),
- unaligned_len);
- desc->header.raw |= (128 - unaligned_len) << 16;
- }
-
- /* first page */
- catbuf = dma_map_single(NULL, buffer_data, buffer_len,
- DMA_TO_DEVICE);
- desc->data.cat_buf[0].form.start_addr = catbuf >> 3;
- desc->data.cat_buf[0].form.len = buffer_len - 1;
-}
-#define TX_CATBUF2 BIT(26)
-static void meth_tx_2page_prepare(struct meth_private *priv,
- struct sk_buff *skb)
-{
- tx_packet *desc = &priv->tx_ring[priv->tx_write];
- void *buffer1_data = (void *)(((unsigned long)skb->data + 7) & ~7);
- void *buffer2_data = (void *)PAGE_ALIGN((unsigned long)skb->data);
- int unaligned_len = (int)((unsigned long)buffer1_data - (unsigned long)skb->data);
- int buffer1_len = (int)((unsigned long)buffer2_data - (unsigned long)buffer1_data);
- int buffer2_len = skb->len - buffer1_len - unaligned_len;
- dma_addr_t catbuf1, catbuf2;
-
- desc->header.raw = METH_TX_CMD_INT_EN | TX_CATBUF1 | TX_CATBUF2| (skb->len - 1);
- /* unaligned part */
- if (unaligned_len){
- skb_copy_from_linear_data(skb, desc->data.dt + (120 - unaligned_len),
- unaligned_len);
- desc->header.raw |= (128 - unaligned_len) << 16;
- }
-
- /* first page */
- catbuf1 = dma_map_single(NULL, buffer1_data, buffer1_len,
- DMA_TO_DEVICE);
- desc->data.cat_buf[0].form.start_addr = catbuf1 >> 3;
- desc->data.cat_buf[0].form.len = buffer1_len - 1;
- /* second page */
- catbuf2 = dma_map_single(NULL, buffer2_data, buffer2_len,
- DMA_TO_DEVICE);
- desc->data.cat_buf[1].form.start_addr = catbuf2 >> 3;
- desc->data.cat_buf[1].form.len = buffer2_len - 1;
-}
-
-static void meth_add_to_tx_ring(struct meth_private *priv, struct sk_buff *skb)
-{
- /* Remember the skb, so we can free it at interrupt time */
- priv->tx_skbs[priv->tx_write] = skb;
- if (skb->len <= 120) {
- /* Whole packet fits into descriptor */
- meth_tx_short_prepare(priv, skb);
- } else if (PAGE_ALIGN((unsigned long)skb->data) !=
- PAGE_ALIGN((unsigned long)skb->data + skb->len - 1)) {
- /* Packet crosses page boundary */
- meth_tx_2page_prepare(priv, skb);
- } else {
- /* Packet is in one page */
- meth_tx_1page_prepare(priv, skb);
- }
- priv->tx_write = (priv->tx_write + 1) & (TX_RING_ENTRIES - 1);
- mace->eth.tx_info = priv->tx_write;
- priv->tx_count++;
-}
-
-/*
- * Transmit a packet (called by the kernel)
- */
-static int meth_tx(struct sk_buff *skb, struct net_device *dev)
-{
- struct meth_private *priv = netdev_priv(dev);
- unsigned long flags;
-
- spin_lock_irqsave(&priv->meth_lock, flags);
- /* Stop DMA notification */
- priv->dma_ctrl &= ~(METH_DMA_TX_INT_EN);
- mace->eth.dma_ctrl = priv->dma_ctrl;
-
- meth_add_to_tx_ring(priv, skb);
- dev->trans_start = jiffies; /* save the timestamp */
-
- /* If TX ring is full, tell the upper layer to stop sending packets */
- if (meth_tx_full(dev)) {
- printk(KERN_DEBUG "TX full: stopping\n");
- netif_stop_queue(dev);
- }
-
- /* Restart DMA notification */
- priv->dma_ctrl |= METH_DMA_TX_INT_EN;
- mace->eth.dma_ctrl = priv->dma_ctrl;
-
- spin_unlock_irqrestore(&priv->meth_lock, flags);
-
- return NETDEV_TX_OK;
-}
-
-/*
- * Deal with a transmit timeout.
- */
-static void meth_tx_timeout(struct net_device *dev)
-{
- struct meth_private *priv = netdev_priv(dev);
- unsigned long flags;
-
- printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
-
- /* Protect against concurrent rx interrupts */
- spin_lock_irqsave(&priv->meth_lock,flags);
-
- /* Try to reset the interface. */
- meth_reset(dev);
-
- dev->stats.tx_errors++;
-
- /* Clear all rings */
- meth_free_tx_ring(priv);
- meth_free_rx_ring(priv);
- meth_init_tx_ring(priv);
- meth_init_rx_ring(priv);
-
- /* Restart dma */
- priv->dma_ctrl |= METH_DMA_TX_EN | METH_DMA_RX_EN | METH_DMA_RX_INT_EN;
- mace->eth.dma_ctrl = priv->dma_ctrl;
-
- /* Enable interrupt */
- spin_unlock_irqrestore(&priv->meth_lock, flags);
-
- dev->trans_start = jiffies; /* prevent tx timeout */
- netif_wake_queue(dev);
-}
-
-/*
- * Ioctl commands
- */
-static int meth_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
-{
- /* XXX Not yet implemented */
- switch(cmd) {
- case SIOCGMIIPHY:
- case SIOCGMIIREG:
- case SIOCSMIIREG:
- default:
- return -EOPNOTSUPP;
- }
-}
-
-static const struct net_device_ops meth_netdev_ops = {
- .ndo_open = meth_open,
- .ndo_stop = meth_release,
- .ndo_start_xmit = meth_tx,
- .ndo_do_ioctl = meth_ioctl,
- .ndo_tx_timeout = meth_tx_timeout,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_set_mac_address = eth_mac_addr,
-};
-
-/*
- * The init function.
- */
-static int __devinit meth_probe(struct platform_device *pdev)
-{
- struct net_device *dev;
- struct meth_private *priv;
- int err;
-
- dev = alloc_etherdev(sizeof(struct meth_private));
- if (!dev)
- return -ENOMEM;
-
- dev->netdev_ops = &meth_netdev_ops;
- dev->watchdog_timeo = timeout;
- dev->irq = MACE_ETHERNET_IRQ;
- dev->base_addr = (unsigned long)&mace->eth;
- memcpy(dev->dev_addr, o2meth_eaddr, 6);
-
- priv = netdev_priv(dev);
- spin_lock_init(&priv->meth_lock);
- SET_NETDEV_DEV(dev, &pdev->dev);
-
- err = register_netdev(dev);
- if (err) {
- free_netdev(dev);
- return err;
- }
-
- printk(KERN_INFO "%s: SGI MACE Ethernet rev. %d\n",
- dev->name, (unsigned int)(mace->eth.mac_ctrl >> 29));
- return 0;
-}
-
-static int __exit meth_remove(struct platform_device *pdev)
-{
- struct net_device *dev = platform_get_drvdata(pdev);
-
- unregister_netdev(dev);
- free_netdev(dev);
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static struct platform_driver meth_driver = {
- .probe = meth_probe,
- .remove = __exit_p(meth_remove),
- .driver = {
- .name = "meth",
- .owner = THIS_MODULE,
- }
-};
-
-static int __init meth_init_module(void)
-{
- int err;
-
- err = platform_driver_register(&meth_driver);
- if (err)
- printk(KERN_ERR "Driver registration failed\n");
-
- return err;
-}
-
-static void __exit meth_exit_module(void)
-{
- platform_driver_unregister(&meth_driver);
-}
-
-module_init(meth_init_module);
-module_exit(meth_exit_module);
-
-MODULE_AUTHOR("Ilya Volynets <ilya@theIlya.com>");
-MODULE_DESCRIPTION("SGI O2 Builtin Fast Ethernet driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:meth");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-30 02:27:14 +0300