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path: root/drivers/net/mace.c
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Diffstat (limited to 'drivers/net/mace.c')
-rw-r--r--drivers/net/mace.c1031
1 files changed, 0 insertions, 1031 deletions
diff --git a/drivers/net/mace.c b/drivers/net/mace.c
deleted file mode 100644
index 2074e9724ba..00000000000
--- a/drivers/net/mace.c
+++ /dev/null
@@ -1,1031 +0,0 @@
-/*
- * Network device driver for the MACE ethernet controller on
- * Apple Powermacs. Assumes it's under a DBDMA controller.
- *
- * Copyright (C) 1996 Paul Mackerras.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/delay.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/crc32.h>
-#include <linux/spinlock.h>
-#include <linux/bitrev.h>
-#include <linux/slab.h>
-#include <asm/prom.h>
-#include <asm/dbdma.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/macio.h>
-
-#include "mace.h"
-
-static int port_aaui = -1;
-
-#define N_RX_RING 8
-#define N_TX_RING 6
-#define MAX_TX_ACTIVE 1
-#define NCMDS_TX 1 /* dma commands per element in tx ring */
-#define RX_BUFLEN (ETH_FRAME_LEN + 8)
-#define TX_TIMEOUT HZ /* 1 second */
-
-/* Chip rev needs workaround on HW & multicast addr change */
-#define BROKEN_ADDRCHG_REV 0x0941
-
-/* Bits in transmit DMA status */
-#define TX_DMA_ERR 0x80
-
-struct mace_data {
- volatile struct mace __iomem *mace;
- volatile struct dbdma_regs __iomem *tx_dma;
- int tx_dma_intr;
- volatile struct dbdma_regs __iomem *rx_dma;
- int rx_dma_intr;
- volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */
- volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */
- struct sk_buff *rx_bufs[N_RX_RING];
- int rx_fill;
- int rx_empty;
- struct sk_buff *tx_bufs[N_TX_RING];
- int tx_fill;
- int tx_empty;
- unsigned char maccc;
- unsigned char tx_fullup;
- unsigned char tx_active;
- unsigned char tx_bad_runt;
- struct timer_list tx_timeout;
- int timeout_active;
- int port_aaui;
- int chipid;
- struct macio_dev *mdev;
- spinlock_t lock;
-};
-
-/*
- * Number of bytes of private data per MACE: allow enough for
- * the rx and tx dma commands plus a branch dma command each,
- * and another 16 bytes to allow us to align the dma command
- * buffers on a 16 byte boundary.
- */
-#define PRIV_BYTES (sizeof(struct mace_data) \
- + (N_RX_RING + NCMDS_TX * N_TX_RING + 3) * sizeof(struct dbdma_cmd))
-
-static int mace_open(struct net_device *dev);
-static int mace_close(struct net_device *dev);
-static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev);
-static void mace_set_multicast(struct net_device *dev);
-static void mace_reset(struct net_device *dev);
-static int mace_set_address(struct net_device *dev, void *addr);
-static irqreturn_t mace_interrupt(int irq, void *dev_id);
-static irqreturn_t mace_txdma_intr(int irq, void *dev_id);
-static irqreturn_t mace_rxdma_intr(int irq, void *dev_id);
-static void mace_set_timeout(struct net_device *dev);
-static void mace_tx_timeout(unsigned long data);
-static inline void dbdma_reset(volatile struct dbdma_regs __iomem *dma);
-static inline void mace_clean_rings(struct mace_data *mp);
-static void __mace_set_address(struct net_device *dev, void *addr);
-
-/*
- * If we can't get a skbuff when we need it, we use this area for DMA.
- */
-static unsigned char *dummy_buf;
-
-static const struct net_device_ops mace_netdev_ops = {
- .ndo_open = mace_open,
- .ndo_stop = mace_close,
- .ndo_start_xmit = mace_xmit_start,
- .ndo_set_multicast_list = mace_set_multicast,
- .ndo_set_mac_address = mace_set_address,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int __devinit mace_probe(struct macio_dev *mdev, const struct of_device_id *match)
-{
- struct device_node *mace = macio_get_of_node(mdev);
- struct net_device *dev;
- struct mace_data *mp;
- const unsigned char *addr;
- int j, rev, rc = -EBUSY;
-
- if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) {
- printk(KERN_ERR "can't use MACE %s: need 3 addrs and 3 irqs\n",
- mace->full_name);
- return -ENODEV;
- }
-
- addr = of_get_property(mace, "mac-address", NULL);
- if (addr == NULL) {
- addr = of_get_property(mace, "local-mac-address", NULL);
- if (addr == NULL) {
- printk(KERN_ERR "Can't get mac-address for MACE %s\n",
- mace->full_name);
- return -ENODEV;
- }
- }
-
- /*
- * lazy allocate the driver-wide dummy buffer. (Note that we
- * never have more than one MACE in the system anyway)
- */
- if (dummy_buf == NULL) {
- dummy_buf = kmalloc(RX_BUFLEN+2, GFP_KERNEL);
- if (dummy_buf == NULL) {
- printk(KERN_ERR "MACE: couldn't allocate dummy buffer\n");
- return -ENOMEM;
- }
- }
-
- if (macio_request_resources(mdev, "mace")) {
- printk(KERN_ERR "MACE: can't request IO resources !\n");
- return -EBUSY;
- }
-
- dev = alloc_etherdev(PRIV_BYTES);
- if (!dev) {
- printk(KERN_ERR "MACE: can't allocate ethernet device !\n");
- rc = -ENOMEM;
- goto err_release;
- }
- SET_NETDEV_DEV(dev, &mdev->ofdev.dev);
-
- mp = netdev_priv(dev);
- mp->mdev = mdev;
- macio_set_drvdata(mdev, dev);
-
- dev->base_addr = macio_resource_start(mdev, 0);
- mp->mace = ioremap(dev->base_addr, 0x1000);
- if (mp->mace == NULL) {
- printk(KERN_ERR "MACE: can't map IO resources !\n");
- rc = -ENOMEM;
- goto err_free;
- }
- dev->irq = macio_irq(mdev, 0);
-
- rev = addr[0] == 0 && addr[1] == 0xA0;
- for (j = 0; j < 6; ++j) {
- dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
- }
- mp->chipid = (in_8(&mp->mace->chipid_hi) << 8) |
- in_8(&mp->mace->chipid_lo);
-
-
- mp = netdev_priv(dev);
- mp->maccc = ENXMT | ENRCV;
-
- mp->tx_dma = ioremap(macio_resource_start(mdev, 1), 0x1000);
- if (mp->tx_dma == NULL) {
- printk(KERN_ERR "MACE: can't map TX DMA resources !\n");
- rc = -ENOMEM;
- goto err_unmap_io;
- }
- mp->tx_dma_intr = macio_irq(mdev, 1);
-
- mp->rx_dma = ioremap(macio_resource_start(mdev, 2), 0x1000);
- if (mp->rx_dma == NULL) {
- printk(KERN_ERR "MACE: can't map RX DMA resources !\n");
- rc = -ENOMEM;
- goto err_unmap_tx_dma;
- }
- mp->rx_dma_intr = macio_irq(mdev, 2);
-
- mp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(mp + 1);
- mp->rx_cmds = mp->tx_cmds + NCMDS_TX * N_TX_RING + 1;
-
- memset((char *) mp->tx_cmds, 0,
- (NCMDS_TX*N_TX_RING + N_RX_RING + 2) * sizeof(struct dbdma_cmd));
- init_timer(&mp->tx_timeout);
- spin_lock_init(&mp->lock);
- mp->timeout_active = 0;
-
- if (port_aaui >= 0)
- mp->port_aaui = port_aaui;
- else {
- /* Apple Network Server uses the AAUI port */
- if (of_machine_is_compatible("AAPL,ShinerESB"))
- mp->port_aaui = 1;
- else {
-#ifdef CONFIG_MACE_AAUI_PORT
- mp->port_aaui = 1;
-#else
- mp->port_aaui = 0;
-#endif
- }
- }
-
- dev->netdev_ops = &mace_netdev_ops;
-
- /*
- * Most of what is below could be moved to mace_open()
- */
- mace_reset(dev);
-
- rc = request_irq(dev->irq, mace_interrupt, 0, "MACE", dev);
- if (rc) {
- printk(KERN_ERR "MACE: can't get irq %d\n", dev->irq);
- goto err_unmap_rx_dma;
- }
- rc = request_irq(mp->tx_dma_intr, mace_txdma_intr, 0, "MACE-txdma", dev);
- if (rc) {
- printk(KERN_ERR "MACE: can't get irq %d\n", mp->tx_dma_intr);
- goto err_free_irq;
- }
- rc = request_irq(mp->rx_dma_intr, mace_rxdma_intr, 0, "MACE-rxdma", dev);
- if (rc) {
- printk(KERN_ERR "MACE: can't get irq %d\n", mp->rx_dma_intr);
- goto err_free_tx_irq;
- }
-
- rc = register_netdev(dev);
- if (rc) {
- printk(KERN_ERR "MACE: Cannot register net device, aborting.\n");
- goto err_free_rx_irq;
- }
-
- printk(KERN_INFO "%s: MACE at %pM, chip revision %d.%d\n",
- dev->name, dev->dev_addr,
- mp->chipid >> 8, mp->chipid & 0xff);
-
- return 0;
-
- err_free_rx_irq:
- free_irq(macio_irq(mdev, 2), dev);
- err_free_tx_irq:
- free_irq(macio_irq(mdev, 1), dev);
- err_free_irq:
- free_irq(macio_irq(mdev, 0), dev);
- err_unmap_rx_dma:
- iounmap(mp->rx_dma);
- err_unmap_tx_dma:
- iounmap(mp->tx_dma);
- err_unmap_io:
- iounmap(mp->mace);
- err_free:
- free_netdev(dev);
- err_release:
- macio_release_resources(mdev);
-
- return rc;
-}
-
-static int __devexit mace_remove(struct macio_dev *mdev)
-{
- struct net_device *dev = macio_get_drvdata(mdev);
- struct mace_data *mp;
-
- BUG_ON(dev == NULL);
-
- macio_set_drvdata(mdev, NULL);
-
- mp = netdev_priv(dev);
-
- unregister_netdev(dev);
-
- free_irq(dev->irq, dev);
- free_irq(mp->tx_dma_intr, dev);
- free_irq(mp->rx_dma_intr, dev);
-
- iounmap(mp->rx_dma);
- iounmap(mp->tx_dma);
- iounmap(mp->mace);
-
- free_netdev(dev);
-
- macio_release_resources(mdev);
-
- return 0;
-}
-
-static void dbdma_reset(volatile struct dbdma_regs __iomem *dma)
-{
- int i;
-
- out_le32(&dma->control, (WAKE|FLUSH|PAUSE|RUN) << 16);
-
- /*
- * Yes this looks peculiar, but apparently it needs to be this
- * way on some machines.
- */
- for (i = 200; i > 0; --i)
- if (ld_le32(&dma->control) & RUN)
- udelay(1);
-}
-
-static void mace_reset(struct net_device *dev)
-{
- struct mace_data *mp = netdev_priv(dev);
- volatile struct mace __iomem *mb = mp->mace;
- int i;
-
- /* soft-reset the chip */
- i = 200;
- while (--i) {
- out_8(&mb->biucc, SWRST);
- if (in_8(&mb->biucc) & SWRST) {
- udelay(10);
- continue;
- }
- break;
- }
- if (!i) {
- printk(KERN_ERR "mace: cannot reset chip!\n");
- return;
- }
-
- out_8(&mb->imr, 0xff); /* disable all intrs for now */
- i = in_8(&mb->ir);
- out_8(&mb->maccc, 0); /* turn off tx, rx */
-
- out_8(&mb->biucc, XMTSP_64);
- out_8(&mb->utr, RTRD);
- out_8(&mb->fifocc, RCVFW_32 | XMTFW_16 | XMTFWU | RCVFWU | XMTBRST);
- out_8(&mb->xmtfc, AUTO_PAD_XMIT); /* auto-pad short frames */
- out_8(&mb->rcvfc, 0);
-
- /* load up the hardware address */
- __mace_set_address(dev, dev->dev_addr);
-
- /* clear the multicast filter */
- if (mp->chipid == BROKEN_ADDRCHG_REV)
- out_8(&mb->iac, LOGADDR);
- else {
- out_8(&mb->iac, ADDRCHG | LOGADDR);
- while ((in_8(&mb->iac) & ADDRCHG) != 0)
- ;
- }
- for (i = 0; i < 8; ++i)
- out_8(&mb->ladrf, 0);
-
- /* done changing address */
- if (mp->chipid != BROKEN_ADDRCHG_REV)
- out_8(&mb->iac, 0);
-
- if (mp->port_aaui)
- out_8(&mb->plscc, PORTSEL_AUI + ENPLSIO);
- else
- out_8(&mb->plscc, PORTSEL_GPSI + ENPLSIO);
-}
-
-static void __mace_set_address(struct net_device *dev, void *addr)
-{
- struct mace_data *mp = netdev_priv(dev);
- volatile struct mace __iomem *mb = mp->mace;
- unsigned char *p = addr;
- int i;
-
- /* load up the hardware address */
- if (mp->chipid == BROKEN_ADDRCHG_REV)
- out_8(&mb->iac, PHYADDR);
- else {
- out_8(&mb->iac, ADDRCHG | PHYADDR);
- while ((in_8(&mb->iac) & ADDRCHG) != 0)
- ;
- }
- for (i = 0; i < 6; ++i)
- out_8(&mb->padr, dev->dev_addr[i] = p[i]);
- if (mp->chipid != BROKEN_ADDRCHG_REV)
- out_8(&mb->iac, 0);
-}
-
-static int mace_set_address(struct net_device *dev, void *addr)
-{
- struct mace_data *mp = netdev_priv(dev);
- volatile struct mace __iomem *mb = mp->mace;
- unsigned long flags;
-
- spin_lock_irqsave(&mp->lock, flags);
-
- __mace_set_address(dev, addr);
-
- /* note: setting ADDRCHG clears ENRCV */
- out_8(&mb->maccc, mp->maccc);
-
- spin_unlock_irqrestore(&mp->lock, flags);
- return 0;
-}
-
-static inline void mace_clean_rings(struct mace_data *mp)
-{
- int i;
-
- /* free some skb's */
- for (i = 0; i < N_RX_RING; ++i) {
- if (mp->rx_bufs[i] != NULL) {
- dev_kfree_skb(mp->rx_bufs[i]);
- mp->rx_bufs[i] = NULL;
- }
- }
- for (i = mp->tx_empty; i != mp->tx_fill; ) {
- dev_kfree_skb(mp->tx_bufs[i]);
- if (++i >= N_TX_RING)
- i = 0;
- }
-}
-
-static int mace_open(struct net_device *dev)
-{
- struct mace_data *mp = netdev_priv(dev);
- volatile struct mace __iomem *mb = mp->mace;
- volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
- volatile struct dbdma_regs __iomem *td = mp->tx_dma;
- volatile struct dbdma_cmd *cp;
- int i;
- struct sk_buff *skb;
- unsigned char *data;
-
- /* reset the chip */
- mace_reset(dev);
-
- /* initialize list of sk_buffs for receiving and set up recv dma */
- mace_clean_rings(mp);
- memset((char *)mp->rx_cmds, 0, N_RX_RING * sizeof(struct dbdma_cmd));
- cp = mp->rx_cmds;
- for (i = 0; i < N_RX_RING - 1; ++i) {
- skb = dev_alloc_skb(RX_BUFLEN + 2);
- if (!skb) {
- data = dummy_buf;
- } else {
- skb_reserve(skb, 2); /* so IP header lands on 4-byte bdry */
- data = skb->data;
- }
- mp->rx_bufs[i] = skb;
- st_le16(&cp->req_count, RX_BUFLEN);
- st_le16(&cp->command, INPUT_LAST + INTR_ALWAYS);
- st_le32(&cp->phy_addr, virt_to_bus(data));
- cp->xfer_status = 0;
- ++cp;
- }
- mp->rx_bufs[i] = NULL;
- st_le16(&cp->command, DBDMA_STOP);
- mp->rx_fill = i;
- mp->rx_empty = 0;
-
- /* Put a branch back to the beginning of the receive command list */
- ++cp;
- st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
- st_le32(&cp->cmd_dep, virt_to_bus(mp->rx_cmds));
-
- /* start rx dma */
- out_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */
- out_le32(&rd->cmdptr, virt_to_bus(mp->rx_cmds));
- out_le32(&rd->control, (RUN << 16) | RUN);
-
- /* put a branch at the end of the tx command list */
- cp = mp->tx_cmds + NCMDS_TX * N_TX_RING;
- st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
- st_le32(&cp->cmd_dep, virt_to_bus(mp->tx_cmds));
-
- /* reset tx dma */
- out_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
- out_le32(&td->cmdptr, virt_to_bus(mp->tx_cmds));
- mp->tx_fill = 0;
- mp->tx_empty = 0;
- mp->tx_fullup = 0;
- mp->tx_active = 0;
- mp->tx_bad_runt = 0;
-
- /* turn it on! */
- out_8(&mb->maccc, mp->maccc);
- /* enable all interrupts except receive interrupts */
- out_8(&mb->imr, RCVINT);
-
- return 0;
-}
-
-static int mace_close(struct net_device *dev)
-{
- struct mace_data *mp = netdev_priv(dev);
- volatile struct mace __iomem *mb = mp->mace;
- volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
- volatile struct dbdma_regs __iomem *td = mp->tx_dma;
-
- /* disable rx and tx */
- out_8(&mb->maccc, 0);
- out_8(&mb->imr, 0xff); /* disable all intrs */
-
- /* disable rx and tx dma */
- st_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */
- st_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */
-
- mace_clean_rings(mp);
-
- return 0;
-}
-
-static inline void mace_set_timeout(struct net_device *dev)
-{
- struct mace_data *mp = netdev_priv(dev);
-
- if (mp->timeout_active)
- del_timer(&mp->tx_timeout);
- mp->tx_timeout.expires = jiffies + TX_TIMEOUT;
- mp->tx_timeout.function = mace_tx_timeout;
- mp->tx_timeout.data = (unsigned long) dev;
- add_timer(&mp->tx_timeout);
- mp->timeout_active = 1;
-}
-
-static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev)
-{
- struct mace_data *mp = netdev_priv(dev);
- volatile struct dbdma_regs __iomem *td = mp->tx_dma;
- volatile struct dbdma_cmd *cp, *np;
- unsigned long flags;
- int fill, next, len;
-
- /* see if there's a free slot in the tx ring */
- spin_lock_irqsave(&mp->lock, flags);
- fill = mp->tx_fill;
- next = fill + 1;
- if (next >= N_TX_RING)
- next = 0;
- if (next == mp->tx_empty) {
- netif_stop_queue(dev);
- mp->tx_fullup = 1;
- spin_unlock_irqrestore(&mp->lock, flags);
- return NETDEV_TX_BUSY; /* can't take it at the moment */
- }
- spin_unlock_irqrestore(&mp->lock, flags);
-
- /* partially fill in the dma command block */
- len = skb->len;
- if (len > ETH_FRAME_LEN) {
- printk(KERN_DEBUG "mace: xmit frame too long (%d)\n", len);
- len = ETH_FRAME_LEN;
- }
- mp->tx_bufs[fill] = skb;
- cp = mp->tx_cmds + NCMDS_TX * fill;
- st_le16(&cp->req_count, len);
- st_le32(&cp->phy_addr, virt_to_bus(skb->data));
-
- np = mp->tx_cmds + NCMDS_TX * next;
- out_le16(&np->command, DBDMA_STOP);
-
- /* poke the tx dma channel */
- spin_lock_irqsave(&mp->lock, flags);
- mp->tx_fill = next;
- if (!mp->tx_bad_runt && mp->tx_active < MAX_TX_ACTIVE) {
- out_le16(&cp->xfer_status, 0);
- out_le16(&cp->command, OUTPUT_LAST);
- out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
- ++mp->tx_active;
- mace_set_timeout(dev);
- }
- if (++next >= N_TX_RING)
- next = 0;
- if (next == mp->tx_empty)
- netif_stop_queue(dev);
- spin_unlock_irqrestore(&mp->lock, flags);
-
- return NETDEV_TX_OK;
-}
-
-static void mace_set_multicast(struct net_device *dev)
-{
- struct mace_data *mp = netdev_priv(dev);
- volatile struct mace __iomem *mb = mp->mace;
- int i;
- u32 crc;
- unsigned long flags;
-
- spin_lock_irqsave(&mp->lock, flags);
- mp->maccc &= ~PROM;
- if (dev->flags & IFF_PROMISC) {
- mp->maccc |= PROM;
- } else {
- unsigned char multicast_filter[8];
- struct netdev_hw_addr *ha;
-
- if (dev->flags & IFF_ALLMULTI) {
- for (i = 0; i < 8; i++)
- multicast_filter[i] = 0xff;
- } else {
- for (i = 0; i < 8; i++)
- multicast_filter[i] = 0;
- netdev_for_each_mc_addr(ha, dev) {
- crc = ether_crc_le(6, ha->addr);
- i = crc >> 26; /* bit number in multicast_filter */
- multicast_filter[i >> 3] |= 1 << (i & 7);
- }
- }
-#if 0
- printk("Multicast filter :");
- for (i = 0; i < 8; i++)
- printk("%02x ", multicast_filter[i]);
- printk("\n");
-#endif
-
- if (mp->chipid == BROKEN_ADDRCHG_REV)
- out_8(&mb->iac, LOGADDR);
- else {
- out_8(&mb->iac, ADDRCHG | LOGADDR);
- while ((in_8(&mb->iac) & ADDRCHG) != 0)
- ;
- }
- for (i = 0; i < 8; ++i)
- out_8(&mb->ladrf, multicast_filter[i]);
- if (mp->chipid != BROKEN_ADDRCHG_REV)
- out_8(&mb->iac, 0);
- }
- /* reset maccc */
- out_8(&mb->maccc, mp->maccc);
- spin_unlock_irqrestore(&mp->lock, flags);
-}
-
-static void mace_handle_misc_intrs(struct mace_data *mp, int intr, struct net_device *dev)
-{
- volatile struct mace __iomem *mb = mp->mace;
- static int mace_babbles, mace_jabbers;
-
- if (intr & MPCO)
- dev->stats.rx_missed_errors += 256;
- dev->stats.rx_missed_errors += in_8(&mb->mpc); /* reading clears it */
- if (intr & RNTPCO)
- dev->stats.rx_length_errors += 256;
- dev->stats.rx_length_errors += in_8(&mb->rntpc); /* reading clears it */
- if (intr & CERR)
- ++dev->stats.tx_heartbeat_errors;
- if (intr & BABBLE)
- if (mace_babbles++ < 4)
- printk(KERN_DEBUG "mace: babbling transmitter\n");
- if (intr & JABBER)
- if (mace_jabbers++ < 4)
- printk(KERN_DEBUG "mace: jabbering transceiver\n");
-}
-
-static irqreturn_t mace_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *) dev_id;
- struct mace_data *mp = netdev_priv(dev);
- volatile struct mace __iomem *mb = mp->mace;
- volatile struct dbdma_regs __iomem *td = mp->tx_dma;
- volatile struct dbdma_cmd *cp;
- int intr, fs, i, stat, x;
- int xcount, dstat;
- unsigned long flags;
- /* static int mace_last_fs, mace_last_xcount; */
-
- spin_lock_irqsave(&mp->lock, flags);
- intr = in_8(&mb->ir); /* read interrupt register */
- in_8(&mb->xmtrc); /* get retries */
- mace_handle_misc_intrs(mp, intr, dev);
-
- i = mp->tx_empty;
- while (in_8(&mb->pr) & XMTSV) {
- del_timer(&mp->tx_timeout);
- mp->timeout_active = 0;
- /*
- * Clear any interrupt indication associated with this status
- * word. This appears to unlatch any error indication from
- * the DMA controller.
- */
- intr = in_8(&mb->ir);
- if (intr != 0)
- mace_handle_misc_intrs(mp, intr, dev);
- if (mp->tx_bad_runt) {
- fs = in_8(&mb->xmtfs);
- mp->tx_bad_runt = 0;
- out_8(&mb->xmtfc, AUTO_PAD_XMIT);
- continue;
- }
- dstat = ld_le32(&td->status);
- /* stop DMA controller */
- out_le32(&td->control, RUN << 16);
- /*
- * xcount is the number of complete frames which have been
- * written to the fifo but for which status has not been read.
- */
- xcount = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK;
- if (xcount == 0 || (dstat & DEAD)) {
- /*
- * If a packet was aborted before the DMA controller has
- * finished transferring it, it seems that there are 2 bytes
- * which are stuck in some buffer somewhere. These will get
- * transmitted as soon as we read the frame status (which
- * reenables the transmit data transfer request). Turning
- * off the DMA controller and/or resetting the MACE doesn't
- * help. So we disable auto-padding and FCS transmission
- * so the two bytes will only be a runt packet which should
- * be ignored by other stations.
- */
- out_8(&mb->xmtfc, DXMTFCS);
- }
- fs = in_8(&mb->xmtfs);
- if ((fs & XMTSV) == 0) {
- printk(KERN_ERR "mace: xmtfs not valid! (fs=%x xc=%d ds=%x)\n",
- fs, xcount, dstat);
- mace_reset(dev);
- /*
- * XXX mace likes to hang the machine after a xmtfs error.
- * This is hard to reproduce, reseting *may* help
- */
- }
- cp = mp->tx_cmds + NCMDS_TX * i;
- stat = ld_le16(&cp->xfer_status);
- if ((fs & (UFLO|LCOL|LCAR|RTRY)) || (dstat & DEAD) || xcount == 0) {
- /*
- * Check whether there were in fact 2 bytes written to
- * the transmit FIFO.
- */
- udelay(1);
- x = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK;
- if (x != 0) {
- /* there were two bytes with an end-of-packet indication */
- mp->tx_bad_runt = 1;
- mace_set_timeout(dev);
- } else {
- /*
- * Either there weren't the two bytes buffered up, or they
- * didn't have an end-of-packet indication.
- * We flush the transmit FIFO just in case (by setting the
- * XMTFWU bit with the transmitter disabled).
- */
- out_8(&mb->maccc, in_8(&mb->maccc) & ~ENXMT);
- out_8(&mb->fifocc, in_8(&mb->fifocc) | XMTFWU);
- udelay(1);
- out_8(&mb->maccc, in_8(&mb->maccc) | ENXMT);
- out_8(&mb->xmtfc, AUTO_PAD_XMIT);
- }
- }
- /* dma should have finished */
- if (i == mp->tx_fill) {
- printk(KERN_DEBUG "mace: tx ring ran out? (fs=%x xc=%d ds=%x)\n",
- fs, xcount, dstat);
- continue;
- }
- /* Update stats */
- if (fs & (UFLO|LCOL|LCAR|RTRY)) {
- ++dev->stats.tx_errors;
- if (fs & LCAR)
- ++dev->stats.tx_carrier_errors;
- if (fs & (UFLO|LCOL|RTRY))
- ++dev->stats.tx_aborted_errors;
- } else {
- dev->stats.tx_bytes += mp->tx_bufs[i]->len;
- ++dev->stats.tx_packets;
- }
- dev_kfree_skb_irq(mp->tx_bufs[i]);
- --mp->tx_active;
- if (++i >= N_TX_RING)
- i = 0;
-#if 0
- mace_last_fs = fs;
- mace_last_xcount = xcount;
-#endif
- }
-
- if (i != mp->tx_empty) {
- mp->tx_fullup = 0;
- netif_wake_queue(dev);
- }
- mp->tx_empty = i;
- i += mp->tx_active;
- if (i >= N_TX_RING)
- i -= N_TX_RING;
- if (!mp->tx_bad_runt && i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE) {
- do {
- /* set up the next one */
- cp = mp->tx_cmds + NCMDS_TX * i;
- out_le16(&cp->xfer_status, 0);
- out_le16(&cp->command, OUTPUT_LAST);
- ++mp->tx_active;
- if (++i >= N_TX_RING)
- i = 0;
- } while (i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE);
- out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
- mace_set_timeout(dev);
- }
- spin_unlock_irqrestore(&mp->lock, flags);
- return IRQ_HANDLED;
-}
-
-static void mace_tx_timeout(unsigned long data)
-{
- struct net_device *dev = (struct net_device *) data;
- struct mace_data *mp = netdev_priv(dev);
- volatile struct mace __iomem *mb = mp->mace;
- volatile struct dbdma_regs __iomem *td = mp->tx_dma;
- volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
- volatile struct dbdma_cmd *cp;
- unsigned long flags;
- int i;
-
- spin_lock_irqsave(&mp->lock, flags);
- mp->timeout_active = 0;
- if (mp->tx_active == 0 && !mp->tx_bad_runt)
- goto out;
-
- /* update various counters */
- mace_handle_misc_intrs(mp, in_8(&mb->ir), dev);
-
- cp = mp->tx_cmds + NCMDS_TX * mp->tx_empty;
-
- /* turn off both tx and rx and reset the chip */
- out_8(&mb->maccc, 0);
- printk(KERN_ERR "mace: transmit timeout - resetting\n");
- dbdma_reset(td);
- mace_reset(dev);
-
- /* restart rx dma */
- cp = bus_to_virt(ld_le32(&rd->cmdptr));
- dbdma_reset(rd);
- out_le16(&cp->xfer_status, 0);
- out_le32(&rd->cmdptr, virt_to_bus(cp));
- out_le32(&rd->control, (RUN << 16) | RUN);
-
- /* fix up the transmit side */
- i = mp->tx_empty;
- mp->tx_active = 0;
- ++dev->stats.tx_errors;
- if (mp->tx_bad_runt) {
- mp->tx_bad_runt = 0;
- } else if (i != mp->tx_fill) {
- dev_kfree_skb(mp->tx_bufs[i]);
- if (++i >= N_TX_RING)
- i = 0;
- mp->tx_empty = i;
- }
- mp->tx_fullup = 0;
- netif_wake_queue(dev);
- if (i != mp->tx_fill) {
- cp = mp->tx_cmds + NCMDS_TX * i;
- out_le16(&cp->xfer_status, 0);
- out_le16(&cp->command, OUTPUT_LAST);
- out_le32(&td->cmdptr, virt_to_bus(cp));
- out_le32(&td->control, (RUN << 16) | RUN);
- ++mp->tx_active;
- mace_set_timeout(dev);
- }
-
- /* turn it back on */
- out_8(&mb->imr, RCVINT);
- out_8(&mb->maccc, mp->maccc);
-
-out:
- spin_unlock_irqrestore(&mp->lock, flags);
-}
-
-static irqreturn_t mace_txdma_intr(int irq, void *dev_id)
-{
- return IRQ_HANDLED;
-}
-
-static irqreturn_t mace_rxdma_intr(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *) dev_id;
- struct mace_data *mp = netdev_priv(dev);
- volatile struct dbdma_regs __iomem *rd = mp->rx_dma;
- volatile struct dbdma_cmd *cp, *np;
- int i, nb, stat, next;
- struct sk_buff *skb;
- unsigned frame_status;
- static int mace_lost_status;
- unsigned char *data;
- unsigned long flags;
-
- spin_lock_irqsave(&mp->lock, flags);
- for (i = mp->rx_empty; i != mp->rx_fill; ) {
- cp = mp->rx_cmds + i;
- stat = ld_le16(&cp->xfer_status);
- if ((stat & ACTIVE) == 0) {
- next = i + 1;
- if (next >= N_RX_RING)
- next = 0;
- np = mp->rx_cmds + next;
- if (next != mp->rx_fill &&
- (ld_le16(&np->xfer_status) & ACTIVE) != 0) {
- printk(KERN_DEBUG "mace: lost a status word\n");
- ++mace_lost_status;
- } else
- break;
- }
- nb = ld_le16(&cp->req_count) - ld_le16(&cp->res_count);
- out_le16(&cp->command, DBDMA_STOP);
- /* got a packet, have a look at it */
- skb = mp->rx_bufs[i];
- if (!skb) {
- ++dev->stats.rx_dropped;
- } else if (nb > 8) {
- data = skb->data;
- frame_status = (data[nb-3] << 8) + data[nb-4];
- if (frame_status & (RS_OFLO|RS_CLSN|RS_FRAMERR|RS_FCSERR)) {
- ++dev->stats.rx_errors;
- if (frame_status & RS_OFLO)
- ++dev->stats.rx_over_errors;
- if (frame_status & RS_FRAMERR)
- ++dev->stats.rx_frame_errors;
- if (frame_status & RS_FCSERR)
- ++dev->stats.rx_crc_errors;
- } else {
- /* Mace feature AUTO_STRIP_RCV is on by default, dropping the
- * FCS on frames with 802.3 headers. This means that Ethernet
- * frames have 8 extra octets at the end, while 802.3 frames
- * have only 4. We need to correctly account for this. */
- if (*(unsigned short *)(data+12) < 1536) /* 802.3 header */
- nb -= 4;
- else /* Ethernet header; mace includes FCS */
- nb -= 8;
- skb_put(skb, nb);
- skb->protocol = eth_type_trans(skb, dev);
- dev->stats.rx_bytes += skb->len;
- netif_rx(skb);
- mp->rx_bufs[i] = NULL;
- ++dev->stats.rx_packets;
- }
- } else {
- ++dev->stats.rx_errors;
- ++dev->stats.rx_length_errors;
- }
-
- /* advance to next */
- if (++i >= N_RX_RING)
- i = 0;
- }
- mp->rx_empty = i;
-
- i = mp->rx_fill;
- for (;;) {
- next = i + 1;
- if (next >= N_RX_RING)
- next = 0;
- if (next == mp->rx_empty)
- break;
- cp = mp->rx_cmds + i;
- skb = mp->rx_bufs[i];
- if (!skb) {
- skb = dev_alloc_skb(RX_BUFLEN + 2);
- if (skb) {
- skb_reserve(skb, 2);
- mp->rx_bufs[i] = skb;
- }
- }
- st_le16(&cp->req_count, RX_BUFLEN);
- data = skb? skb->data: dummy_buf;
- st_le32(&cp->phy_addr, virt_to_bus(data));
- out_le16(&cp->xfer_status, 0);
- out_le16(&cp->command, INPUT_LAST + INTR_ALWAYS);
-#if 0
- if ((ld_le32(&rd->status) & ACTIVE) != 0) {
- out_le32(&rd->control, (PAUSE << 16) | PAUSE);
- while ((in_le32(&rd->status) & ACTIVE) != 0)
- ;
- }
-#endif
- i = next;
- }
- if (i != mp->rx_fill) {
- out_le32(&rd->control, ((RUN|WAKE) << 16) | (RUN|WAKE));
- mp->rx_fill = i;
- }
- spin_unlock_irqrestore(&mp->lock, flags);
- return IRQ_HANDLED;
-}
-
-static struct of_device_id mace_match[] =
-{
- {
- .name = "mace",
- },
- {},
-};
-MODULE_DEVICE_TABLE (of, mace_match);
-
-static struct macio_driver mace_driver =
-{
- .driver = {
- .name = "mace",
- .owner = THIS_MODULE,
- .of_match_table = mace_match,
- },
- .probe = mace_probe,
- .remove = mace_remove,
-};
-
-
-static int __init mace_init(void)
-{
- return macio_register_driver(&mace_driver);
-}
-
-static void __exit mace_cleanup(void)
-{
- macio_unregister_driver(&mace_driver);
-
- kfree(dummy_buf);
- dummy_buf = NULL;
-}
-
-MODULE_AUTHOR("Paul Mackerras");
-MODULE_DESCRIPTION("PowerMac MACE driver.");
-module_param(port_aaui, int, 0);
-MODULE_PARM_DESC(port_aaui, "MACE uses AAUI port (0-1)");
-MODULE_LICENSE("GPL");
-
-module_init(mace_init);
-module_exit(mace_cleanup);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-23 16:42:24 +0000