+++ /dev/null
-/* 3c527.c: 3Com Etherlink/MC32 driver for Linux 2.4 and 2.6.
- *
- * (c) Copyright 1998 Red Hat Software Inc
- * Written by Alan Cox.
- * Further debugging by Carl Drougge.
- * Initial SMP support by Felipe W Damasio <felipewd@terra.com.br>
- * Heavily modified by Richard Procter <rnp@paradise.net.nz>
- *
- * Based on skeleton.c written 1993-94 by Donald Becker and ne2.c
- * (for the MCA stuff) written by Wim Dumon.
- *
- * Thanks to 3Com for making this possible by providing me with the
- * documentation.
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-
-#define DRV_NAME "3c527"
-#define DRV_VERSION "0.7-SMP"
-#define DRV_RELDATE "2003/09/21"
-
-static const char *version =
-DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Richard Procter <rnp@paradise.net.nz>\n";
-
-/**
- * DOC: Traps for the unwary
- *
- * The diagram (Figure 1-1) and the POS summary disagree with the
- * "Interrupt Level" section in the manual.
- *
- * The manual contradicts itself when describing the minimum number
- * buffers in the 'configure lists' command.
- * My card accepts a buffer config of 4/4.
- *
- * Setting the SAV BP bit does not save bad packets, but
- * only enables RX on-card stats collection.
- *
- * The documentation in places seems to miss things. In actual fact
- * I've always eventually found everything is documented, it just
- * requires careful study.
- *
- * DOC: Theory Of Operation
- *
- * The 3com 3c527 is a 32bit MCA bus mastering adapter with a large
- * amount of on board intelligence that housekeeps a somewhat dumber
- * Intel NIC. For performance we want to keep the transmit queue deep
- * as the card can transmit packets while fetching others from main
- * memory by bus master DMA. Transmission and reception are driven by
- * circular buffer queues.
- *
- * The mailboxes can be used for controlling how the card traverses
- * its buffer rings, but are used only for initial setup in this
- * implementation. The exec mailbox allows a variety of commands to
- * be executed. Each command must complete before the next is
- * executed. Primarily we use the exec mailbox for controlling the
- * multicast lists. We have to do a certain amount of interesting
- * hoop jumping as the multicast list changes can occur in interrupt
- * state when the card has an exec command pending. We defer such
- * events until the command completion interrupt.
- *
- * A copy break scheme (taken from 3c59x.c) is employed whereby
- * received frames exceeding a configurable length are passed
- * directly to the higher networking layers without incuring a copy,
- * in what amounts to a time/space trade-off.
- *
- * The card also keeps a large amount of statistical information
- * on-board. In a perfect world, these could be used safely at no
- * cost. However, lacking information to the contrary, processing
- * them without races would involve so much extra complexity as to
- * make it unworthwhile to do so. In the end, a hybrid SW/HW
- * implementation was made necessary --- see mc32_update_stats().
- *
- * DOC: Notes
- *
- * It should be possible to use two or more cards, but at this stage
- * only by loading two copies of the same module.
- *
- * The on-board 82586 NIC has trouble receiving multiple
- * back-to-back frames and so is likely to drop packets from fast
- * senders.
-**/
-
-#include <linux/module.h>
-
-#include <linux/errno.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/if_ether.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/mca-legacy.h>
-#include <linux/ioport.h>
-#include <linux/in.h>
-#include <linux/skbuff.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/wait.h>
-#include <linux/ethtool.h>
-#include <linux/completion.h>
-#include <linux/bitops.h>
-#include <linux/semaphore.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#include "3c527.h"
-
-MODULE_LICENSE("GPL");
-
-/*
- * The name of the card. Is used for messages and in the requests for
- * io regions, irqs and dma channels
- */
-static const char* cardname = DRV_NAME;
-
-/* use 0 for production, 1 for verification, >2 for debug */
-#ifndef NET_DEBUG
-#define NET_DEBUG 2
-#endif
-
-static unsigned int mc32_debug = NET_DEBUG;
-
-/* The number of low I/O ports used by the ethercard. */
-#define MC32_IO_EXTENT 8
-
-/* As implemented, values must be a power-of-2 -- 4/8/16/32 */
-#define TX_RING_LEN 32 /* Typically the card supports 37 */
-#define RX_RING_LEN 8 /* " " " */
-
-/* Copy break point, see above for details.
- * Setting to > 1512 effectively disables this feature. */
-#define RX_COPYBREAK 200 /* Value from 3c59x.c */
-
-/* Issue the 82586 workaround command - this is for "busy lans", but
- * basically means for all lans now days - has a performance (latency)
- * cost, but best set. */
-static const int WORKAROUND_82586=1;
-
-/* Pointers to buffers and their on-card records */
-struct mc32_ring_desc
-{
- volatile struct skb_header *p;
- struct sk_buff *skb;
-};
-
-/* Information that needs to be kept for each board. */
-struct mc32_local
-{
- int slot;
-
- u32 base;
- volatile struct mc32_mailbox *rx_box;
- volatile struct mc32_mailbox *tx_box;
- volatile struct mc32_mailbox *exec_box;
- volatile struct mc32_stats *stats; /* Start of on-card statistics */
- u16 tx_chain; /* Transmit list start offset */
- u16 rx_chain; /* Receive list start offset */
- u16 tx_len; /* Transmit list count */
- u16 rx_len; /* Receive list count */
-
- u16 xceiver_desired_state; /* HALTED or RUNNING */
- u16 cmd_nonblocking; /* Thread is uninterested in command result */
- u16 mc_reload_wait; /* A multicast load request is pending */
- u32 mc_list_valid; /* True when the mclist is set */
-
- struct mc32_ring_desc tx_ring[TX_RING_LEN]; /* Host Transmit ring */
- struct mc32_ring_desc rx_ring[RX_RING_LEN]; /* Host Receive ring */
-
- atomic_t tx_count; /* buffers left */
- atomic_t tx_ring_head; /* index to tx en-queue end */
- u16 tx_ring_tail; /* index to tx de-queue end */
-
- u16 rx_ring_tail; /* index to rx de-queue end */
-
- struct semaphore cmd_mutex; /* Serialises issuing of execute commands */
- struct completion execution_cmd; /* Card has completed an execute command */
- struct completion xceiver_cmd; /* Card has completed a tx or rx command */
-};
-
-/* The station (ethernet) address prefix, used for a sanity check. */
-#define SA_ADDR0 0x02
-#define SA_ADDR1 0x60
-#define SA_ADDR2 0xAC
-
-struct mca_adapters_t {
- unsigned int id;
- char *name;
-};
-
-static const struct mca_adapters_t mc32_adapters[] = {
- { 0x0041, "3COM EtherLink MC/32" },
- { 0x8EF5, "IBM High Performance Lan Adapter" },
- { 0x0000, NULL }
-};
-
-
-/* Macros for ring index manipulations */
-static inline u16 next_rx(u16 rx) { return (rx+1)&(RX_RING_LEN-1); };
-static inline u16 prev_rx(u16 rx) { return (rx-1)&(RX_RING_LEN-1); };
-
-static inline u16 next_tx(u16 tx) { return (tx+1)&(TX_RING_LEN-1); };
-
-
-/* Index to functions, as function prototypes. */
-static int mc32_probe1(struct net_device *dev, int ioaddr);
-static int mc32_command(struct net_device *dev, u16 cmd, void *data, int len);
-static int mc32_open(struct net_device *dev);
-static void mc32_timeout(struct net_device *dev);
-static netdev_tx_t mc32_send_packet(struct sk_buff *skb,
- struct net_device *dev);
-static irqreturn_t mc32_interrupt(int irq, void *dev_id);
-static int mc32_close(struct net_device *dev);
-static struct net_device_stats *mc32_get_stats(struct net_device *dev);
-static void mc32_set_multicast_list(struct net_device *dev);
-static void mc32_reset_multicast_list(struct net_device *dev);
-static const struct ethtool_ops netdev_ethtool_ops;
-
-static void cleanup_card(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- unsigned slot = lp->slot;
- mca_mark_as_unused(slot);
- mca_set_adapter_name(slot, NULL);
- free_irq(dev->irq, dev);
- release_region(dev->base_addr, MC32_IO_EXTENT);
-}
-
-/**
- * mc32_probe - Search for supported boards
- * @unit: interface number to use
- *
- * Because MCA bus is a real bus and we can scan for cards we could do a
- * single scan for all boards here. Right now we use the passed in device
- * structure and scan for only one board. This needs fixing for modules
- * in particular.
- */
-
-struct net_device *__init mc32_probe(int unit)
-{
- struct net_device *dev = alloc_etherdev(sizeof(struct mc32_local));
- static int current_mca_slot = -1;
- int i;
- int err;
-
- if (!dev)
- return ERR_PTR(-ENOMEM);
-
- if (unit >= 0)
- sprintf(dev->name, "eth%d", unit);
-
- /* Do not check any supplied i/o locations.
- POS registers usually don't fail :) */
-
- /* MCA cards have POS registers.
- Autodetecting MCA cards is extremely simple.
- Just search for the card. */
-
- for(i = 0; (mc32_adapters[i].name != NULL); i++) {
- current_mca_slot =
- mca_find_unused_adapter(mc32_adapters[i].id, 0);
-
- if(current_mca_slot != MCA_NOTFOUND) {
- if(!mc32_probe1(dev, current_mca_slot))
- {
- mca_set_adapter_name(current_mca_slot,
- mc32_adapters[i].name);
- mca_mark_as_used(current_mca_slot);
- err = register_netdev(dev);
- if (err) {
- cleanup_card(dev);
- free_netdev(dev);
- dev = ERR_PTR(err);
- }
- return dev;
- }
-
- }
- }
- free_netdev(dev);
- return ERR_PTR(-ENODEV);
-}
-
-static const struct net_device_ops netdev_ops = {
- .ndo_open = mc32_open,
- .ndo_stop = mc32_close,
- .ndo_start_xmit = mc32_send_packet,
- .ndo_get_stats = mc32_get_stats,
- .ndo_set_multicast_list = mc32_set_multicast_list,
- .ndo_tx_timeout = mc32_timeout,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-/**
- * mc32_probe1 - Check a given slot for a board and test the card
- * @dev: Device structure to fill in
- * @slot: The MCA bus slot being used by this card
- *
- * Decode the slot data and configure the card structures. Having done this we
- * can reset the card and configure it. The card does a full self test cycle
- * in firmware so we have to wait for it to return and post us either a
- * failure case or some addresses we use to find the board internals.
- */
-
-static int __init mc32_probe1(struct net_device *dev, int slot)
-{
- static unsigned version_printed;
- int i, err;
- u8 POS;
- u32 base;
- struct mc32_local *lp = netdev_priv(dev);
- static const u16 mca_io_bases[] = {
- 0x7280,0x7290,
- 0x7680,0x7690,
- 0x7A80,0x7A90,
- 0x7E80,0x7E90
- };
- static const u32 mca_mem_bases[] = {
- 0x00C0000,
- 0x00C4000,
- 0x00C8000,
- 0x00CC000,
- 0x00D0000,
- 0x00D4000,
- 0x00D8000,
- 0x00DC000
- };
- static const char * const failures[] = {
- "Processor instruction",
- "Processor data bus",
- "Processor data bus",
- "Processor data bus",
- "Adapter bus",
- "ROM checksum",
- "Base RAM",
- "Extended RAM",
- "82586 internal loopback",
- "82586 initialisation failure",
- "Adapter list configuration error"
- };
-
- /* Time to play MCA games */
-
- if (mc32_debug && version_printed++ == 0)
- pr_debug("%s", version);
-
- pr_info("%s: %s found in slot %d: ", dev->name, cardname, slot);
-
- POS = mca_read_stored_pos(slot, 2);
-
- if(!(POS&1))
- {
- pr_cont("disabled.\n");
- return -ENODEV;
- }
-
- /* Fill in the 'dev' fields. */
- dev->base_addr = mca_io_bases[(POS>>1)&7];
- dev->mem_start = mca_mem_bases[(POS>>4)&7];
-
- POS = mca_read_stored_pos(slot, 4);
- if(!(POS&1))
- {
- pr_cont("memory window disabled.\n");
- return -ENODEV;
- }
-
- POS = mca_read_stored_pos(slot, 5);
-
- i=(POS>>4)&3;
- if(i==3)
- {
- pr_cont("invalid memory window.\n");
- return -ENODEV;
- }
-
- i*=16384;
- i+=16384;
-
- dev->mem_end=dev->mem_start + i;
-
- dev->irq = ((POS>>2)&3)+9;
-
- if(!request_region(dev->base_addr, MC32_IO_EXTENT, cardname))
- {
- pr_cont("io 0x%3lX, which is busy.\n", dev->base_addr);
- return -EBUSY;
- }
-
- pr_cont("io 0x%3lX irq %d mem 0x%lX (%dK)\n",
- dev->base_addr, dev->irq, dev->mem_start, i/1024);
-
-
- /* We ought to set the cache line size here.. */
-
-
- /*
- * Go PROM browsing
- */
-
- /* Retrieve and print the ethernet address. */
- for (i = 0; i < 6; i++)
- {
- mca_write_pos(slot, 6, i+12);
- mca_write_pos(slot, 7, 0);
-
- dev->dev_addr[i] = mca_read_pos(slot,3);
- }
-
- pr_info("%s: Address %pM ", dev->name, dev->dev_addr);
-
- mca_write_pos(slot, 6, 0);
- mca_write_pos(slot, 7, 0);
-
- POS = mca_read_stored_pos(slot, 4);
-
- if(POS&2)
- pr_cont(": BNC port selected.\n");
- else
- pr_cont(": AUI port selected.\n");
-
- POS=inb(dev->base_addr+HOST_CTRL);
- POS|=HOST_CTRL_ATTN|HOST_CTRL_RESET;
- POS&=~HOST_CTRL_INTE;
- outb(POS, dev->base_addr+HOST_CTRL);
- /* Reset adapter */
- udelay(100);
- /* Reset off */
- POS&=~(HOST_CTRL_ATTN|HOST_CTRL_RESET);
- outb(POS, dev->base_addr+HOST_CTRL);
-
- udelay(300);
-
- /*
- * Grab the IRQ
- */
-
- err = request_irq(dev->irq, mc32_interrupt, IRQF_SHARED, DRV_NAME, dev);
- if (err) {
- release_region(dev->base_addr, MC32_IO_EXTENT);
- pr_err("%s: unable to get IRQ %d.\n", DRV_NAME, dev->irq);
- goto err_exit_ports;
- }
-
- memset(lp, 0, sizeof(struct mc32_local));
- lp->slot = slot;
-
- i=0;
-
- base = inb(dev->base_addr);
-
- while(base == 0xFF)
- {
- i++;
- if(i == 1000)
- {
- pr_err("%s: failed to boot adapter.\n", dev->name);
- err = -ENODEV;
- goto err_exit_irq;
- }
- udelay(1000);
- if(inb(dev->base_addr+2)&(1<<5))
- base = inb(dev->base_addr);
- }
-
- if(base>0)
- {
- if(base < 0x0C)
- pr_err("%s: %s%s.\n", dev->name, failures[base-1],
- base<0x0A?" test failure":"");
- else
- pr_err("%s: unknown failure %d.\n", dev->name, base);
- err = -ENODEV;
- goto err_exit_irq;
- }
-
- base=0;
- for(i=0;i<4;i++)
- {
- int n=0;
-
- while(!(inb(dev->base_addr+2)&(1<<5)))
- {
- n++;
- udelay(50);
- if(n>100)
- {
- pr_err("%s: mailbox read fail (%d).\n", dev->name, i);
- err = -ENODEV;
- goto err_exit_irq;
- }
- }
-
- base|=(inb(dev->base_addr)<<(8*i));
- }
-
- lp->exec_box=isa_bus_to_virt(dev->mem_start+base);
-
- base=lp->exec_box->data[1]<<16|lp->exec_box->data[0];
-
- lp->base = dev->mem_start+base;
-
- lp->rx_box=isa_bus_to_virt(lp->base + lp->exec_box->data[2]);
- lp->tx_box=isa_bus_to_virt(lp->base + lp->exec_box->data[3]);
-
- lp->stats = isa_bus_to_virt(lp->base + lp->exec_box->data[5]);
-
- /*
- * Descriptor chains (card relative)
- */
-
- lp->tx_chain = lp->exec_box->data[8]; /* Transmit list start offset */
- lp->rx_chain = lp->exec_box->data[10]; /* Receive list start offset */
- lp->tx_len = lp->exec_box->data[9]; /* Transmit list count */
- lp->rx_len = lp->exec_box->data[11]; /* Receive list count */
-
- sema_init(&lp->cmd_mutex, 0);
- init_completion(&lp->execution_cmd);
- init_completion(&lp->xceiver_cmd);
-
- pr_info("%s: Firmware Rev %d. %d RX buffers, %d TX buffers. Base of 0x%08X.\n",
- dev->name, lp->exec_box->data[12], lp->rx_len, lp->tx_len, lp->base);
-
- dev->netdev_ops = &netdev_ops;
- dev->watchdog_timeo = HZ*5; /* Board does all the work */
- dev->ethtool_ops = &netdev_ethtool_ops;
-
- return 0;
-
-err_exit_irq:
- free_irq(dev->irq, dev);
-err_exit_ports:
- release_region(dev->base_addr, MC32_IO_EXTENT);
- return err;
-}
-
-
-/**
- * mc32_ready_poll - wait until we can feed it a command
- * @dev: The device to wait for
- *
- * Wait until the card becomes ready to accept a command via the
- * command register. This tells us nothing about the completion
- * status of any pending commands and takes very little time at all.
- */
-
-static inline void mc32_ready_poll(struct net_device *dev)
-{
- int ioaddr = dev->base_addr;
- while(!(inb(ioaddr+HOST_STATUS)&HOST_STATUS_CRR));
-}
-
-
-/**
- * mc32_command_nowait - send a command non blocking
- * @dev: The 3c527 to issue the command to
- * @cmd: The command word to write to the mailbox
- * @data: A data block if the command expects one
- * @len: Length of the data block
- *
- * Send a command from interrupt state. If there is a command
- * currently being executed then we return an error of -1. It
- * simply isn't viable to wait around as commands may be
- * slow. This can theoretically be starved on SMP, but it's hard
- * to see a realistic situation. We do not wait for the command
- * to complete --- we rely on the interrupt handler to tidy up
- * after us.
- */
-
-static int mc32_command_nowait(struct net_device *dev, u16 cmd, void *data, int len)
-{
- struct mc32_local *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
- int ret = -1;
-
- if (down_trylock(&lp->cmd_mutex) == 0)
- {
- lp->cmd_nonblocking=1;
- lp->exec_box->mbox=0;
- lp->exec_box->mbox=cmd;
- memcpy((void *)lp->exec_box->data, data, len);
- barrier(); /* the memcpy forgot the volatile so be sure */
-
- /* Send the command */
- mc32_ready_poll(dev);
- outb(1<<6, ioaddr+HOST_CMD);
-
- ret = 0;
-
- /* Interrupt handler will signal mutex on completion */
- }
-
- return ret;
-}
-
-
-/**
- * mc32_command - send a command and sleep until completion
- * @dev: The 3c527 card to issue the command to
- * @cmd: The command word to write to the mailbox
- * @data: A data block if the command expects one
- * @len: Length of the data block
- *
- * Sends exec commands in a user context. This permits us to wait around
- * for the replies and also to wait for the command buffer to complete
- * from a previous command before we execute our command. After our
- * command completes we will attempt any pending multicast reload
- * we blocked off by hogging the exec buffer.
- *
- * You feed the card a command, you wait, it interrupts you get a
- * reply. All well and good. The complication arises because you use
- * commands for filter list changes which come in at bh level from things
- * like IPV6 group stuff.
- */
-
-static int mc32_command(struct net_device *dev, u16 cmd, void *data, int len)
-{
- struct mc32_local *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
- int ret = 0;
-
- down(&lp->cmd_mutex);
-
- /*
- * My Turn
- */
-
- lp->cmd_nonblocking=0;
- lp->exec_box->mbox=0;
- lp->exec_box->mbox=cmd;
- memcpy((void *)lp->exec_box->data, data, len);
- barrier(); /* the memcpy forgot the volatile so be sure */
-
- mc32_ready_poll(dev);
- outb(1<<6, ioaddr+HOST_CMD);
-
- wait_for_completion(&lp->execution_cmd);
-
- if(lp->exec_box->mbox&(1<<13))
- ret = -1;
-
- up(&lp->cmd_mutex);
-
- /*
- * A multicast set got blocked - try it now
- */
-
- if(lp->mc_reload_wait)
- {
- mc32_reset_multicast_list(dev);
- }
-
- return ret;
-}
-
-
-/**
- * mc32_start_transceiver - tell board to restart tx/rx
- * @dev: The 3c527 card to issue the command to
- *
- * This may be called from the interrupt state, where it is used
- * to restart the rx ring if the card runs out of rx buffers.
- *
- * We must first check if it's ok to (re)start the transceiver. See
- * mc32_close for details.
- */
-
-static void mc32_start_transceiver(struct net_device *dev) {
-
- struct mc32_local *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
-
- /* Ignore RX overflow on device closure */
- if (lp->xceiver_desired_state==HALTED)
- return;
-
- /* Give the card the offset to the post-EOL-bit RX descriptor */
- mc32_ready_poll(dev);
- lp->rx_box->mbox=0;
- lp->rx_box->data[0]=lp->rx_ring[prev_rx(lp->rx_ring_tail)].p->next;
- outb(HOST_CMD_START_RX, ioaddr+HOST_CMD);
-
- mc32_ready_poll(dev);
- lp->tx_box->mbox=0;
- outb(HOST_CMD_RESTRT_TX, ioaddr+HOST_CMD); /* card ignores this on RX restart */
-
- /* We are not interrupted on start completion */
-}
-
-
-/**
- * mc32_halt_transceiver - tell board to stop tx/rx
- * @dev: The 3c527 card to issue the command to
- *
- * We issue the commands to halt the card's transceiver. In fact,
- * after some experimenting we now simply tell the card to
- * suspend. When issuing aborts occasionally odd things happened.
- *
- * We then sleep until the card has notified us that both rx and
- * tx have been suspended.
- */
-
-static void mc32_halt_transceiver(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
-
- mc32_ready_poll(dev);
- lp->rx_box->mbox=0;
- outb(HOST_CMD_SUSPND_RX, ioaddr+HOST_CMD);
- wait_for_completion(&lp->xceiver_cmd);
-
- mc32_ready_poll(dev);
- lp->tx_box->mbox=0;
- outb(HOST_CMD_SUSPND_TX, ioaddr+HOST_CMD);
- wait_for_completion(&lp->xceiver_cmd);
-}
-
-
-/**
- * mc32_load_rx_ring - load the ring of receive buffers
- * @dev: 3c527 to build the ring for
- *
- * This initialises the on-card and driver datastructures to
- * the point where mc32_start_transceiver() can be called.
- *
- * The card sets up the receive ring for us. We are required to use the
- * ring it provides, although the size of the ring is configurable.
- *
- * We allocate an sk_buff for each ring entry in turn and
- * initialise its house-keeping info. At the same time, we read
- * each 'next' pointer in our rx_ring array. This reduces slow
- * shared-memory reads and makes it easy to access predecessor
- * descriptors.
- *
- * We then set the end-of-list bit for the last entry so that the
- * card will know when it has run out of buffers.
- */
-
-static int mc32_load_rx_ring(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- int i;
- u16 rx_base;
- volatile struct skb_header *p;
-
- rx_base=lp->rx_chain;
-
- for(i=0; i<RX_RING_LEN; i++) {
- lp->rx_ring[i].skb=alloc_skb(1532, GFP_KERNEL);
- if (lp->rx_ring[i].skb==NULL) {
- for (;i>=0;i--)
- kfree_skb(lp->rx_ring[i].skb);
- return -ENOBUFS;
- }
- skb_reserve(lp->rx_ring[i].skb, 18);
-
- p=isa_bus_to_virt(lp->base+rx_base);
-
- p->control=0;
- p->data=isa_virt_to_bus(lp->rx_ring[i].skb->data);
- p->status=0;
- p->length=1532;
-
- lp->rx_ring[i].p=p;
- rx_base=p->next;
- }
-
- lp->rx_ring[i-1].p->control |= CONTROL_EOL;
-
- lp->rx_ring_tail=0;
-
- return 0;
-}
-
-
-/**
- * mc32_flush_rx_ring - free the ring of receive buffers
- * @lp: Local data of 3c527 to flush the rx ring of
- *
- * Free the buffer for each ring slot. This may be called
- * before mc32_load_rx_ring(), eg. on error in mc32_open().
- * Requires rx skb pointers to point to a valid skb, or NULL.
- */
-
-static void mc32_flush_rx_ring(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- int i;
-
- for(i=0; i < RX_RING_LEN; i++)
- {
- if (lp->rx_ring[i].skb) {
- dev_kfree_skb(lp->rx_ring[i].skb);
- lp->rx_ring[i].skb = NULL;
- }
- lp->rx_ring[i].p=NULL;
- }
-}
-
-
-/**
- * mc32_load_tx_ring - load transmit ring
- * @dev: The 3c527 card to issue the command to
- *
- * This sets up the host transmit data-structures.
- *
- * First, we obtain from the card it's current position in the tx
- * ring, so that we will know where to begin transmitting
- * packets.
- *
- * Then, we read the 'next' pointers from the on-card tx ring into
- * our tx_ring array to reduce slow shared-mem reads. Finally, we
- * intitalise the tx house keeping variables.
- *
- */
-
-static void mc32_load_tx_ring(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- volatile struct skb_header *p;
- int i;
- u16 tx_base;
-
- tx_base=lp->tx_box->data[0];
-
- for(i=0 ; i<TX_RING_LEN ; i++)
- {
- p=isa_bus_to_virt(lp->base+tx_base);
- lp->tx_ring[i].p=p;
- lp->tx_ring[i].skb=NULL;
-
- tx_base=p->next;
- }
-
- /* -1 so that tx_ring_head cannot "lap" tx_ring_tail */
- /* see mc32_tx_ring */
-
- atomic_set(&lp->tx_count, TX_RING_LEN-1);
- atomic_set(&lp->tx_ring_head, 0);
- lp->tx_ring_tail=0;
-}
-
-
-/**
- * mc32_flush_tx_ring - free transmit ring
- * @lp: Local data of 3c527 to flush the tx ring of
- *
- * If the ring is non-empty, zip over the it, freeing any
- * allocated skb_buffs. The tx ring house-keeping variables are
- * then reset. Requires rx skb pointers to point to a valid skb,
- * or NULL.
- */
-
-static void mc32_flush_tx_ring(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- int i;
-
- for (i=0; i < TX_RING_LEN; i++)
- {
- if (lp->tx_ring[i].skb)
- {
- dev_kfree_skb(lp->tx_ring[i].skb);
- lp->tx_ring[i].skb = NULL;
- }
- }
-
- atomic_set(&lp->tx_count, 0);
- atomic_set(&lp->tx_ring_head, 0);
- lp->tx_ring_tail=0;
-}
-
-
-/**
- * mc32_open - handle 'up' of card
- * @dev: device to open
- *
- * The user is trying to bring the card into ready state. This requires
- * a brief dialogue with the card. Firstly we enable interrupts and then
- * 'indications'. Without these enabled the card doesn't bother telling
- * us what it has done. This had me puzzled for a week.
- *
- * We configure the number of card descriptors, then load the network
- * address and multicast filters. Turn on the workaround mode. This
- * works around a bug in the 82586 - it asks the firmware to do
- * so. It has a performance (latency) hit but is needed on busy
- * [read most] lans. We load the ring with buffers then we kick it
- * all off.
- */
-
-static int mc32_open(struct net_device *dev)
-{
- int ioaddr = dev->base_addr;
- struct mc32_local *lp = netdev_priv(dev);
- u8 one=1;
- u8 regs;
- u16 descnumbuffs[2] = {TX_RING_LEN, RX_RING_LEN};
-
- /*
- * Interrupts enabled
- */
-
- regs=inb(ioaddr+HOST_CTRL);
- regs|=HOST_CTRL_INTE;
- outb(regs, ioaddr+HOST_CTRL);
-
- /*
- * Allow ourselves to issue commands
- */
-
- up(&lp->cmd_mutex);
-
-
- /*
- * Send the indications on command
- */
-
- mc32_command(dev, 4, &one, 2);
-
- /*
- * Poke it to make sure it's really dead.
- */
-
- mc32_halt_transceiver(dev);
- mc32_flush_tx_ring(dev);
-
- /*
- * Ask card to set up on-card descriptors to our spec
- */
-
- if(mc32_command(dev, 8, descnumbuffs, 4)) {
- pr_info("%s: %s rejected our buffer configuration!\n",
- dev->name, cardname);
- mc32_close(dev);
- return -ENOBUFS;
- }
-
- /* Report new configuration */
- mc32_command(dev, 6, NULL, 0);
-
- lp->tx_chain = lp->exec_box->data[8]; /* Transmit list start offset */
- lp->rx_chain = lp->exec_box->data[10]; /* Receive list start offset */
- lp->tx_len = lp->exec_box->data[9]; /* Transmit list count */
- lp->rx_len = lp->exec_box->data[11]; /* Receive list count */
-
- /* Set Network Address */
- mc32_command(dev, 1, dev->dev_addr, 6);
-
- /* Set the filters */
- mc32_set_multicast_list(dev);
-
- if (WORKAROUND_82586) {
- u16 zero_word=0;
- mc32_command(dev, 0x0D, &zero_word, 2); /* 82586 bug workaround on */
- }
-
- mc32_load_tx_ring(dev);
-
- if(mc32_load_rx_ring(dev))
- {
- mc32_close(dev);
- return -ENOBUFS;
- }
-
- lp->xceiver_desired_state = RUNNING;
-
- /* And finally, set the ball rolling... */
- mc32_start_transceiver(dev);
-
- netif_start_queue(dev);
-
- return 0;
-}
-
-
-/**
- * mc32_timeout - handle a timeout from the network layer
- * @dev: 3c527 that timed out
- *
- * Handle a timeout on transmit from the 3c527. This normally means
- * bad things as the hardware handles cable timeouts and mess for
- * us.
- *
- */
-
-static void mc32_timeout(struct net_device *dev)
-{
- pr_warning("%s: transmit timed out?\n", dev->name);
- /* Try to restart the adaptor. */
- netif_wake_queue(dev);
-}
-
-
-/**
- * mc32_send_packet - queue a frame for transmit
- * @skb: buffer to transmit
- * @dev: 3c527 to send it out of
- *
- * Transmit a buffer. This normally means throwing the buffer onto
- * the transmit queue as the queue is quite large. If the queue is
- * full then we set tx_busy and return. Once the interrupt handler
- * gets messages telling it to reclaim transmit queue entries, we will
- * clear tx_busy and the kernel will start calling this again.
- *
- * We do not disable interrupts or acquire any locks; this can
- * run concurrently with mc32_tx_ring(), and the function itself
- * is serialised at a higher layer. However, similarly for the
- * card itself, we must ensure that we update tx_ring_head only
- * after we've established a valid packet on the tx ring (and
- * before we let the card "see" it, to prevent it racing with the
- * irq handler).
- *
- */
-
-static netdev_tx_t mc32_send_packet(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- u32 head = atomic_read(&lp->tx_ring_head);
-
- volatile struct skb_header *p, *np;
-
- netif_stop_queue(dev);
-
- if(atomic_read(&lp->tx_count)==0) {
- return NETDEV_TX_BUSY;
- }
-
- if (skb_padto(skb, ETH_ZLEN)) {
- netif_wake_queue(dev);
- return NETDEV_TX_OK;
- }
-
- atomic_dec(&lp->tx_count);
-
- /* P is the last sending/sent buffer as a pointer */
- p=lp->tx_ring[head].p;
-
- head = next_tx(head);
-
- /* NP is the buffer we will be loading */
- np=lp->tx_ring[head].p;
-
- /* We will need this to flush the buffer out */
- lp->tx_ring[head].skb=skb;
-
- np->length = unlikely(skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
- np->data = isa_virt_to_bus(skb->data);
- np->status = 0;
- np->control = CONTROL_EOP | CONTROL_EOL;
- wmb();
-
- /*
- * The new frame has been setup; we can now
- * let the interrupt handler and card "see" it
- */
-
- atomic_set(&lp->tx_ring_head, head);
- p->control &= ~CONTROL_EOL;
-
- netif_wake_queue(dev);
- return NETDEV_TX_OK;
-}
-
-
-/**
- * mc32_update_stats - pull off the on board statistics
- * @dev: 3c527 to service
- *
- *
- * Query and reset the on-card stats. There's the small possibility
- * of a race here, which would result in an underestimation of
- * actual errors. As such, we'd prefer to keep all our stats
- * collection in software. As a rule, we do. However it can't be
- * used for rx errors and collisions as, by default, the card discards
- * bad rx packets.
- *
- * Setting the SAV BP in the rx filter command supposedly
- * stops this behaviour. However, testing shows that it only seems to
- * enable the collation of on-card rx statistics --- the driver
- * never sees an RX descriptor with an error status set.
- *
- */
-
-static void mc32_update_stats(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- volatile struct mc32_stats *st = lp->stats;
-
- u32 rx_errors=0;
-
- rx_errors+=dev->stats.rx_crc_errors +=st->rx_crc_errors;
- st->rx_crc_errors=0;
- rx_errors+=dev->stats.rx_fifo_errors +=st->rx_overrun_errors;
- st->rx_overrun_errors=0;
- rx_errors+=dev->stats.rx_frame_errors +=st->rx_alignment_errors;
- st->rx_alignment_errors=0;
- rx_errors+=dev->stats.rx_length_errors+=st->rx_tooshort_errors;
- st->rx_tooshort_errors=0;
- rx_errors+=dev->stats.rx_missed_errors+=st->rx_outofresource_errors;
- st->rx_outofresource_errors=0;
- dev->stats.rx_errors=rx_errors;
-
- /* Number of packets which saw one collision */
- dev->stats.collisions+=st->dataC[10];
- st->dataC[10]=0;
-
- /* Number of packets which saw 2--15 collisions */
- dev->stats.collisions+=st->dataC[11];
- st->dataC[11]=0;
-}
-
-
-/**
- * mc32_rx_ring - process the receive ring
- * @dev: 3c527 that needs its receive ring processing
- *
- *
- * We have received one or more indications from the card that a
- * receive has completed. The buffer ring thus contains dirty
- * entries. We walk the ring by iterating over the circular rx_ring
- * array, starting at the next dirty buffer (which happens to be the
- * one we finished up at last time around).
- *
- * For each completed packet, we will either copy it and pass it up
- * the stack or, if the packet is near MTU sized, we allocate
- * another buffer and flip the old one up the stack.
- *
- * We must succeed in keeping a buffer on the ring. If necessary we
- * will toss a received packet rather than lose a ring entry. Once
- * the first uncompleted descriptor is found, we move the
- * End-Of-List bit to include the buffers just processed.
- *
- */
-
-static void mc32_rx_ring(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- volatile struct skb_header *p;
- u16 rx_ring_tail;
- u16 rx_old_tail;
- int x=0;
-
- rx_old_tail = rx_ring_tail = lp->rx_ring_tail;
-
- do
- {
- p=lp->rx_ring[rx_ring_tail].p;
-
- if(!(p->status & (1<<7))) { /* Not COMPLETED */
- break;
- }
- if(p->status & (1<<6)) /* COMPLETED_OK */
- {
-
- u16 length=p->length;
- struct sk_buff *skb;
- struct sk_buff *newskb;
-
- /* Try to save time by avoiding a copy on big frames */
-
- if ((length > RX_COPYBREAK) &&
- ((newskb=dev_alloc_skb(1532)) != NULL))
- {
- skb=lp->rx_ring[rx_ring_tail].skb;
- skb_put(skb, length);
-
- skb_reserve(newskb,18);
- lp->rx_ring[rx_ring_tail].skb=newskb;
- p->data=isa_virt_to_bus(newskb->data);
- }
- else
- {
- skb=dev_alloc_skb(length+2);
-
- if(skb==NULL) {
- dev->stats.rx_dropped++;
- goto dropped;
- }
-
- skb_reserve(skb,2);
- memcpy(skb_put(skb, length),
- lp->rx_ring[rx_ring_tail].skb->data, length);
- }
-
- skb->protocol=eth_type_trans(skb,dev);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += length;
- netif_rx(skb);
- }
-
- dropped:
- p->length = 1532;
- p->status = 0;
-
- rx_ring_tail=next_rx(rx_ring_tail);
- }
- while(x++<48);
-
- /* If there was actually a frame to be processed, place the EOL bit */
- /* at the descriptor prior to the one to be filled next */
-
- if (rx_ring_tail != rx_old_tail)
- {
- lp->rx_ring[prev_rx(rx_ring_tail)].p->control |= CONTROL_EOL;
- lp->rx_ring[prev_rx(rx_old_tail)].p->control &= ~CONTROL_EOL;
-
- lp->rx_ring_tail=rx_ring_tail;
- }
-}
-
-
-/**
- * mc32_tx_ring - process completed transmits
- * @dev: 3c527 that needs its transmit ring processing
- *
- *
- * This operates in a similar fashion to mc32_rx_ring. We iterate
- * over the transmit ring. For each descriptor which has been
- * processed by the card, we free its associated buffer and note
- * any errors. This continues until the transmit ring is emptied
- * or we reach a descriptor that hasn't yet been processed by the
- * card.
- *
- */
-
-static void mc32_tx_ring(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- volatile struct skb_header *np;
-
- /*
- * We rely on head==tail to mean 'queue empty'.
- * This is why lp->tx_count=TX_RING_LEN-1: in order to prevent
- * tx_ring_head wrapping to tail and confusing a 'queue empty'
- * condition with 'queue full'
- */
-
- while (lp->tx_ring_tail != atomic_read(&lp->tx_ring_head))
- {
- u16 t;
-
- t=next_tx(lp->tx_ring_tail);
- np=lp->tx_ring[t].p;
-
- if(!(np->status & (1<<7)))
- {
- /* Not COMPLETED */
- break;
- }
- dev->stats.tx_packets++;
- if(!(np->status & (1<<6))) /* Not COMPLETED_OK */
- {
- dev->stats.tx_errors++;
-
- switch(np->status&0x0F)
- {
- case 1:
- dev->stats.tx_aborted_errors++;
- break; /* Max collisions */
- case 2:
- dev->stats.tx_fifo_errors++;
- break;
- case 3:
- dev->stats.tx_carrier_errors++;
- break;
- case 4:
- dev->stats.tx_window_errors++;
- break; /* CTS Lost */
- case 5:
- dev->stats.tx_aborted_errors++;
- break; /* Transmit timeout */
- }
- }
- /* Packets are sent in order - this is
- basically a FIFO queue of buffers matching
- the card ring */
- dev->stats.tx_bytes+=lp->tx_ring[t].skb->len;
- dev_kfree_skb_irq(lp->tx_ring[t].skb);
- lp->tx_ring[t].skb=NULL;
- atomic_inc(&lp->tx_count);
- netif_wake_queue(dev);
-
- lp->tx_ring_tail=t;
- }
-
-}
-
-
-/**
- * mc32_interrupt - handle an interrupt from a 3c527
- * @irq: Interrupt number
- * @dev_id: 3c527 that requires servicing
- * @regs: Registers (unused)
- *
- *
- * An interrupt is raised whenever the 3c527 writes to the command
- * register. This register contains the message it wishes to send us
- * packed into a single byte field. We keep reading status entries
- * until we have processed all the control items, but simply count
- * transmit and receive reports. When all reports are in we empty the
- * transceiver rings as appropriate. This saves the overhead of
- * multiple command requests.
- *
- * Because MCA is level-triggered, we shouldn't miss indications.
- * Therefore, we needn't ask the card to suspend interrupts within
- * this handler. The card receives an implicit acknowledgment of the
- * current interrupt when we read the command register.
- *
- */
-
-static irqreturn_t mc32_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- struct mc32_local *lp;
- int ioaddr, status, boguscount = 0;
- int rx_event = 0;
- int tx_event = 0;
-
- ioaddr = dev->base_addr;
- lp = netdev_priv(dev);
-
- /* See whats cooking */
-
- while((inb(ioaddr+HOST_STATUS)&HOST_STATUS_CWR) && boguscount++<2000)
- {
- status=inb(ioaddr+HOST_CMD);
-
- pr_debug("Status TX%d RX%d EX%d OV%d BC%d\n",
- (status&7), (status>>3)&7, (status>>6)&1,
- (status>>7)&1, boguscount);
-
- switch(status&7)
- {
- case 0:
- break;
- case 6: /* TX fail */
- case 2: /* TX ok */
- tx_event = 1;
- break;
- case 3: /* Halt */
- case 4: /* Abort */
- complete(&lp->xceiver_cmd);
- break;
- default:
- pr_notice("%s: strange tx ack %d\n", dev->name, status&7);
- }
- status>>=3;
- switch(status&7)
- {
- case 0:
- break;
- case 2: /* RX */
- rx_event=1;
- break;
- case 3: /* Halt */
- case 4: /* Abort */
- complete(&lp->xceiver_cmd);
- break;
- case 6:
- /* Out of RX buffers stat */
- /* Must restart rx */
- dev->stats.rx_dropped++;
- mc32_rx_ring(dev);
- mc32_start_transceiver(dev);
- break;
- default:
- pr_notice("%s: strange rx ack %d\n",
- dev->name, status&7);
- }
- status>>=3;
- if(status&1)
- {
- /*
- * No thread is waiting: we need to tidy
- * up ourself.
- */
-
- if (lp->cmd_nonblocking) {
- up(&lp->cmd_mutex);
- if (lp->mc_reload_wait)
- mc32_reset_multicast_list(dev);
- }
- else complete(&lp->execution_cmd);
- }
- if(status&2)
- {
- /*
- * We get interrupted once per
- * counter that is about to overflow.
- */
-
- mc32_update_stats(dev);
- }
- }
-
-
- /*
- * Process the transmit and receive rings
- */
-
- if(tx_event)
- mc32_tx_ring(dev);
-
- if(rx_event)
- mc32_rx_ring(dev);
-
- return IRQ_HANDLED;
-}
-
-
-/**
- * mc32_close - user configuring the 3c527 down
- * @dev: 3c527 card to shut down
- *
- * The 3c527 is a bus mastering device. We must be careful how we
- * shut it down. It may also be running shared interrupt so we have
- * to be sure to silence it properly
- *
- * We indicate that the card is closing to the rest of the
- * driver. Otherwise, it is possible that the card may run out
- * of receive buffers and restart the transceiver while we're
- * trying to close it.
- *
- * We abort any receive and transmits going on and then wait until
- * any pending exec commands have completed in other code threads.
- * In theory we can't get here while that is true, in practice I am
- * paranoid
- *
- * We turn off the interrupt enable for the board to be sure it can't
- * intefere with other devices.
- */
-
-static int mc32_close(struct net_device *dev)
-{
- struct mc32_local *lp = netdev_priv(dev);
- int ioaddr = dev->base_addr;
-
- u8 regs;
- u16 one=1;
-
- lp->xceiver_desired_state = HALTED;
- netif_stop_queue(dev);
-
- /*
- * Send the indications on command (handy debug check)
- */
-
- mc32_command(dev, 4, &one, 2);
-
- /* Shut down the transceiver */
-
- mc32_halt_transceiver(dev);
-
- /* Ensure we issue no more commands beyond this point */
-
- down(&lp->cmd_mutex);
-
- /* Ok the card is now stopping */
-
- regs=inb(ioaddr+HOST_CTRL);
- regs&=~HOST_CTRL_INTE;
- outb(regs, ioaddr+HOST_CTRL);
-
- mc32_flush_rx_ring(dev);
- mc32_flush_tx_ring(dev);
-
- mc32_update_stats(dev);
-
- return 0;
-}
-
-
-/**
- * mc32_get_stats - hand back stats to network layer
- * @dev: The 3c527 card to handle
- *
- * We've collected all the stats we can in software already. Now
- * it's time to update those kept on-card and return the lot.
- *
- */
-
-static struct net_device_stats *mc32_get_stats(struct net_device *dev)
-{
- mc32_update_stats(dev);
- return &dev->stats;
-}
-
-
-/**
- * do_mc32_set_multicast_list - attempt to update multicasts
- * @dev: 3c527 device to load the list on
- * @retry: indicates this is not the first call.
- *
- *
- * Actually set or clear the multicast filter for this adaptor. The
- * locking issues are handled by this routine. We have to track
- * state as it may take multiple calls to get the command sequence
- * completed. We just keep trying to schedule the loads until we
- * manage to process them all.
- *
- * num_addrs == -1 Promiscuous mode, receive all packets
- *
- * num_addrs == 0 Normal mode, clear multicast list
- *
- * num_addrs > 0 Multicast mode, receive normal and MC packets,
- * and do best-effort filtering.
- *
- * See mc32_update_stats() regards setting the SAV BP bit.
- *
- */
-
-static void do_mc32_set_multicast_list(struct net_device *dev, int retry)
-{
- struct mc32_local *lp = netdev_priv(dev);
- u16 filt = (1<<2); /* Save Bad Packets, for stats purposes */
-
- if ((dev->flags&IFF_PROMISC) ||
- (dev->flags&IFF_ALLMULTI) ||
- netdev_mc_count(dev) > 10)
- /* Enable promiscuous mode */
- filt |= 1;
- else if (!netdev_mc_empty(dev))
- {
- unsigned char block[62];
- unsigned char *bp;
- struct netdev_hw_addr *ha;
-
- if(retry==0)
- lp->mc_list_valid = 0;
- if(!lp->mc_list_valid)
- {
- block[1]=0;
- block[0]=netdev_mc_count(dev);
- bp=block+2;
-
- netdev_for_each_mc_addr(ha, dev) {
- memcpy(bp, ha->addr, 6);
- bp+=6;
- }
- if(mc32_command_nowait(dev, 2, block,
- 2+6*netdev_mc_count(dev))==-1)
- {
- lp->mc_reload_wait = 1;
- return;
- }
- lp->mc_list_valid=1;
- }
- }
-
- if(mc32_command_nowait(dev, 0, &filt, 2)==-1)
- {
- lp->mc_reload_wait = 1;
- }
- else {
- lp->mc_reload_wait = 0;
- }
-}
-
-
-/**
- * mc32_set_multicast_list - queue multicast list update
- * @dev: The 3c527 to use
- *
- * Commence loading the multicast list. This is called when the kernel
- * changes the lists. It will override any pending list we are trying to
- * load.
- */
-
-static void mc32_set_multicast_list(struct net_device *dev)
-{
- do_mc32_set_multicast_list(dev,0);
-}
-
-
-/**
- * mc32_reset_multicast_list - reset multicast list
- * @dev: The 3c527 to use
- *
- * Attempt the next step in loading the multicast lists. If this attempt
- * fails to complete then it will be scheduled and this function called
- * again later from elsewhere.
- */
-
-static void mc32_reset_multicast_list(struct net_device *dev)
-{
- do_mc32_set_multicast_list(dev,1);
-}
-
-static void netdev_get_drvinfo(struct net_device *dev,
- struct ethtool_drvinfo *info)
-{
- strcpy(info->driver, DRV_NAME);
- strcpy(info->version, DRV_VERSION);
- sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
-}
-
-static u32 netdev_get_msglevel(struct net_device *dev)
-{
- return mc32_debug;
-}
-
-static void netdev_set_msglevel(struct net_device *dev, u32 level)
-{
- mc32_debug = level;
-}
-
-static const struct ethtool_ops netdev_ethtool_ops = {
- .get_drvinfo = netdev_get_drvinfo,
- .get_msglevel = netdev_get_msglevel,
- .set_msglevel = netdev_set_msglevel,
-};
-
-#ifdef MODULE
-
-static struct net_device *this_device;
-
-/**
- * init_module - entry point
- *
- * Probe and locate a 3c527 card. This really should probe and locate
- * all the 3c527 cards in the machine not just one of them. Yes you can
- * insmod multiple modules for now but it's a hack.
- */
-
-int __init init_module(void)
-{
- this_device = mc32_probe(-1);
- if (IS_ERR(this_device))
- return PTR_ERR(this_device);
- return 0;
-}
-
-/**
- * cleanup_module - free resources for an unload
- *
- * Unloading time. We release the MCA bus resources and the interrupt
- * at which point everything is ready to unload. The card must be stopped
- * at this point or we would not have been called. When we unload we
- * leave the card stopped but not totally shut down. When the card is
- * initialized it must be rebooted or the rings reloaded before any
- * transmit operations are allowed to start scribbling into memory.
- */
-
-void __exit cleanup_module(void)
-{
- unregister_netdev(this_device);
- cleanup_card(this_device);
- free_netdev(this_device);
-}
-
-#endif /* MODULE */
git.openpandora.org / pandora-kernel.git / blobdiff