diff options
author | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-05-20 14:50:27 (GMT) |
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committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-08-12 07:21:33 (GMT) |
commit | 8862bf1ed60de49550109b7023a0a33eb7db8b3c (patch) | |
tree | 76e2c24e847a986c139061f5d522aa94ce97e083 /drivers/net/meth.c | |
parent | a88394cfb58007cca945699545469017beb0d206 (diff) | |
download | linux-fsl-qoriq-8862bf1ed60de49550109b7023a0a33eb7db8b3c.tar.xz |
ioc3-eth/meth: Move the SGI drivers
Move the SGI drivers into drivers/net/ethernet/sgi/ and make the
necessary Kconfig and Makefile changes.
CC: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/meth.c')
-rw-r--r-- | drivers/net/meth.c | 855 |
1 files changed, 0 insertions, 855 deletions
diff --git a/drivers/net/meth.c b/drivers/net/meth.c deleted file mode 100644 index 60135aa..0000000 --- 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"); |