patch-2.1.110 linux/drivers/net/82596.c
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- Lines: 1357
- Date:
Mon Jul 20 17:22:35 1998
- Orig file:
v2.1.109/linux/drivers/net/82596.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.109/linux/drivers/net/82596.c linux/drivers/net/82596.c
@@ -0,0 +1,1356 @@
+/* 82596.c: A generic 82596 ethernet driver for linux. */
+/*
+ Based on Apricot.c
+ Written 1994 by Mark Evans.
+ This driver is for the Apricot 82596 bus-master interface
+
+ Modularised 12/94 Mark Evans
+
+
+ Modified to support the 82596 ethernet chips on 680x0 VME boards.
+ by Richard Hirst <richard@sleepie.demon.co.uk>
+ Renamed to be 82596.c
+
+ *** Untested on Apricot hardware, and may require some hacking
+ *** to make it work. The old 82596.c reported hasn't worked
+ *** since 1.3.xx anyway. I have been unable to find any users
+ *** of Apricot hardware to test this on.
+
+ Most of my modifications relate to the braindead big-endian
+ implementation by Intel. When the i596 is operating in
+ 'big-endian' mode, it thinks a 32 bit value of 0x12345678
+ should be stored as 0x56781234. This is a real pain, when
+ you have linked lists which are shared by the 680x0 and the
+ i596.
+
+ Driver skeleton
+ Written 1993 by Donald Becker.
+ Copyright 1993 United States Government as represented by the Director,
+ National Security Agency. This software may only be used and distributed
+ according to the terms of the GNU Public License as modified by SRC,
+ incorporated herein by reference.
+
+ The author may be reached as becker@super.org or
+ C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715
+
+ */
+
+static const char *version = "82596.c:v1.0 15/07/98\n";
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/malloc.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/pgtable.h> /*?? */
+
+#ifdef CONFIG_MVME16x_NET
+#include <asm/mvme16xhw.h>
+#endif
+#ifdef CONFIG_BVME6000_NET
+#include <asm/bvme6000hw.h>
+#endif
+
+/*
+ * Define various macros for Channel Attention, word swapping etc., dependant
+ * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
+ */
+
+#ifdef __mc68000__
+#define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
+#define ISCP_BUSY 0x00010000
+#define MACH_IS_APRICOT 0
+#else
+#define WSWAPrfd(x) x
+#define WSWAPiscp(x) ((struct i596_iscp *)(x))
+#define WSWAPscb(x) ((struct i596_scb *)(x))
+#define WSWAPcmd(x) x
+#define WSWAPtbd(x) x
+#define WSWAPchar(x) x
+#define ISCP_BUSY 0x0001
+#define MACH_IS_APRICOT 1
+#endif
+
+/*
+ * The MPU_PORT command allows direct access to the 82596. With PORT access
+ * the following commands are available (p5-18). The 32-bit port command
+ * must be word-swapped with the most significant word written first.
+ * This only applies to VME boards.
+ */
+#define PORT_RESET 0x00 /* reset 82596 */
+#define PORT_SELFTEST 0x01 /* selftest */
+#define PORT_ALTSCP 0x02 /* alternate SCB address */
+#define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
+
+#ifndef HAVE_PORTRESERVE
+#define check_region(addr, size) 0
+#define request_region(addr, size,name) do ; while(0)
+#endif
+
+#ifndef HAVE_ALLOC_SKB
+#define alloc_skb(size, priority) (struct sk_buff *) kmalloc(size,priority)
+#define kfree_skbmem(buff, size) kfree_s(buff,size)
+#endif
+
+#define APRICOT_DEBUG 2
+
+#ifdef APRICOT_DEBUG
+int i596_debug = APRICOT_DEBUG;
+#else
+int i596_debug = 1;
+#endif
+
+#define I596_TOTAL_SIZE 17
+
+#define I596_NULL -1
+
+#define CMD_EOL 0x8000 /* The last command of the list, stop. */
+#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
+#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
+
+#define CMD_FLEX 0x0008 /* Enable flexible memory model */
+
+enum commands {
+ CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
+ CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
+};
+
+#define STAT_C 0x8000 /* Set to 0 after execution */
+#define STAT_B 0x4000 /* Command being executed */
+#define STAT_OK 0x2000 /* Command executed ok */
+#define STAT_A 0x1000 /* Command aborted */
+
+#define CUC_START 0x0100
+#define CUC_RESUME 0x0200
+#define CUC_SUSPEND 0x0300
+#define CUC_ABORT 0x0400
+#define RX_START 0x0010
+#define RX_RESUME 0x0020
+#define RX_SUSPEND 0x0030
+#define RX_ABORT 0x0040
+
+struct i596_reg {
+ unsigned short porthi;
+ unsigned short portlo;
+ unsigned long ca;
+};
+
+struct i596_cmd {
+ unsigned short status;
+ unsigned short command;
+ struct i596_cmd *next;
+};
+
+#define EOF 0x8000
+#define SIZE_MASK 0x3fff
+
+struct i596_tbd {
+ unsigned short size;
+ unsigned short pad;
+ struct i596_tbd *next;
+ char *data;
+};
+
+struct tx_cmd {
+ struct i596_cmd cmd;
+ struct i596_tbd *tbd;
+ unsigned short size;
+ unsigned short pad;
+ struct sk_buff *skb; /* So we can free it after tx */
+};
+
+struct i596_rfd {
+ unsigned short stat;
+ unsigned short cmd;
+ struct i596_rfd *next;
+ long rbd;
+ unsigned short count;
+ unsigned short size;
+ char data[1532];
+};
+
+#define RX_RING_SIZE 16
+
+struct i596_scb {
+ unsigned short status;
+ unsigned short command;
+ struct i596_cmd *cmd;
+ struct i596_rfd *rfd;
+ unsigned long crc_err;
+ unsigned long align_err;
+ unsigned long resource_err;
+ unsigned long over_err;
+ unsigned long rcvdt_err;
+ unsigned long short_err;
+ unsigned short t_on;
+ unsigned short t_off;
+};
+
+struct i596_iscp {
+ unsigned long stat;
+ struct i596_scb *scb;
+};
+
+struct i596_scp {
+ unsigned long sysbus;
+ unsigned long pad;
+ struct i596_iscp *iscp;
+};
+
+struct i596_private {
+ volatile struct i596_scp scp;
+ volatile struct i596_iscp iscp;
+ volatile struct i596_scb scb;
+ struct i596_cmd set_add;
+ char eth_addr[8];
+ struct i596_cmd set_conf;
+ char i596_config[16];
+ struct i596_cmd tdr;
+ unsigned long stat;
+ int last_restart __attribute__((aligned(4)));
+ struct i596_rfd *rx_tail;
+ struct i596_cmd *cmd_tail;
+ struct i596_cmd *cmd_head;
+ int cmd_backlog;
+ unsigned long last_cmd;
+ struct net_device_stats stats;
+};
+
+char init_setup[] =
+{
+ 0x8E, /* length, prefetch on */
+ 0xC8, /* fifo to 8, monitor off */
+#ifdef CONFIG_VME
+ 0xc0, /* don't save bad frames */
+#else
+ 0x80, /* don't save bad frames */
+#endif
+ 0x2E, /* No source address insertion, 8 byte preamble */
+ 0x00, /* priority and backoff defaults */
+ 0x60, /* interframe spacing */
+ 0x00, /* slot time LSB */
+ 0xf2, /* slot time and retries */
+ 0x00, /* promiscuous mode */
+ 0x00, /* collision detect */
+ 0x40, /* minimum frame length */
+ 0xff,
+ 0x00,
+ 0x7f /* *multi IA */ };
+
+static int i596_open(struct device *dev);
+static int i596_start_xmit(struct sk_buff *skb, struct device *dev);
+static void i596_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static int i596_close(struct device *dev);
+static struct net_device_stats *i596_get_stats(struct device *dev);
+static void i596_add_cmd(struct device *dev, struct i596_cmd *cmd);
+static void print_eth(char *);
+static void set_multicast_list(struct device *dev);
+
+static int ticks_limit = 25;
+static int max_cmd_backlog = 16;
+
+
+static inline void CA(struct device *dev)
+{
+#ifdef CONFIG_MVME16x_NET
+ if (MACH_IS_MVME16x) {
+ ((struct i596_reg *) dev->base_addr)->ca = 1;
+ }
+#endif
+#ifdef CONFIG_BVME6000_NET
+ if (MACH_IS_BVME6000) {
+ volatile u32 i = *(volatile u32 *) (dev->base_addr);
+ }
+#endif
+#ifdef CONFIG_APRICOT_i596
+ if (MACH_IS_APRICOT) {
+ outw(0, (short) (dev->base_addr) + 4);
+ }
+#endif
+}
+
+
+static inline void MPU_PORT(struct device *dev, int c, volatile void *x)
+{
+#ifdef CONFIG_MVME16x_NET
+ if (MACH_IS_MVME16x) {
+ struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
+ p->porthi = ((c) | (u32) (x)) & 0xffff;
+ p->portlo = ((c) | (u32) (x)) >> 16;
+ }
+#endif
+#ifdef CONFIG_BVME6000_NET
+ if (MACH_IS_BVME6000) {
+ u32 v = (u32) (c) | (u32) (x);
+ v = ((u32) (v) << 16) | ((u32) (v) >> 16);
+ *(volatile u32 *) dev->base_addr = v;
+ udelay(1);
+ *(volatile u32 *) dev->base_addr = v;
+ }
+#endif
+}
+
+
+#if defined(CONFIG_MVME16x_NET) || defined(CONFIG_BVME6000_NET)
+static void i596_error(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct device *dev = dev_id;
+ struct i596_cmd *cmd;
+
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+ printk("i596_error: lp = 0x%08x\n", (u32) lp);
+ printk("scp at %08x, .sysbus = %08x, .iscp = %08x\n",
+ (u32) & lp->scp, (u32) lp->scp.sysbus, (u32) lp->scp.iscp);
+ printk("iscp at %08x, .stat = %08x, .scb = %08x\n",
+ (u32) & lp->iscp, (u32) lp->iscp.stat, (u32) lp->iscp.scb);
+ printk("scb at %08x, .status = %04x, .command = %04x\n",
+ (u32) & lp->scb, lp->scb.status, lp->scb.command);
+ printk(" .cmd = %08x, .rfd = %08x\n", (u32) lp->scb.cmd,
+ (u32) lp->scb.rfd);
+ cmd = WSWAPcmd(lp->scb.cmd);
+ while (cmd && (u32) cmd < 0x1000000) {
+ printk("cmd at %08x, .status = %04x, .command = %04x, .next = %08x\n",
+ (u32) cmd, cmd->status, cmd->command, (u32) cmd->next);
+ cmd = WSWAPcmd(cmd->next);
+ }
+ while (1);
+}
+#endif
+
+static inline int init_rx_bufs(struct device *dev, int num)
+{
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+ int i;
+ struct i596_rfd *rfd;
+
+ lp->scb.rfd = (struct i596_rfd *) I596_NULL;
+
+ if (i596_debug > 1)
+ printk("%s: init_rx_bufs %d.\n", dev->name, num);
+
+ for (i = 0; i < num; i++) {
+ if (!(rfd = (struct i596_rfd *) kmalloc(sizeof(struct i596_rfd), GFP_KERNEL)))
+ break;
+
+ rfd->stat = 0x0000;
+ rfd->rbd = I596_NULL;
+ rfd->count = 0;
+ rfd->size = 1532;
+ if (i == 0) {
+ rfd->cmd = CMD_EOL;
+ lp->rx_tail = rfd;
+ } else
+ rfd->cmd = 0x0000;
+
+ rfd->next = lp->scb.rfd;
+ lp->scb.rfd = WSWAPrfd(rfd);
+ }
+
+ if (i != 0)
+ lp->rx_tail->next = lp->scb.rfd;
+
+ return (i);
+}
+
+static inline void remove_rx_bufs(struct device *dev)
+{
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+ struct i596_rfd *rfd = WSWAPrfd(lp->scb.rfd);
+
+ lp->rx_tail->next = (struct i596_rfd *) I596_NULL;
+
+ do {
+ lp->scb.rfd = rfd->next;
+ kfree(rfd);
+ rfd = WSWAPrfd(lp->scb.rfd);
+ }
+ while (rfd != lp->rx_tail);
+}
+
+static inline void init_i596_mem(struct device *dev)
+{
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+#if !defined(CONFIG_MVME16x_NET) && !defined(CONFIG_BVME6000_NET)
+ short ioaddr = dev->base_addr;
+#endif
+ int boguscnt = 100000;
+ unsigned long flags;
+
+#if defined(CONFIG_MVME16x_NET) || defined(CONFIG_BVME6000_NET)
+#ifdef CONFIG_MVME16x_NET
+ if (MACH_IS_MVME16x) {
+ volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
+
+ /* Disable all ints for now */
+ pcc2[0x28] = 1;
+ pcc2[0x2a] = 0x40;
+ pcc2[0x2b] = 0x40; /* Set snooping bits now! */
+ }
+#endif
+#ifdef CONFIG_BVME6000_NET
+ if (MACH_IS_BVME6000) {
+ volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
+
+ *ethirq = 1;
+ }
+#endif
+
+ MPU_PORT(dev, PORT_RESET, 0);
+
+ udelay(100); /* Wait 100us - seems to help */
+
+ /* change the scp address */
+
+ MPU_PORT(dev, PORT_ALTSCP, &lp->scp);
+
+#else
+
+ /* change the scp address */
+ outw(0, ioaddr);
+ outw(0, ioaddr);
+ outb(4, ioaddr + 0xf);
+ outw(((((int) &lp->scp) & 0xffff) | 2), ioaddr);
+ outw((((int) &lp->scp) >> 16) & 0xffff, ioaddr);
+#endif
+
+ lp->last_cmd = jiffies;
+
+#ifdef CONFIG_MVME16x_NET
+ if (MACH_IS_MVME16x)
+ lp->scp.sysbus = 0x00000054;
+#endif
+#ifdef CONFIG_BVME6000_NET
+ if (MACH_IS_BVME6000)
+ lp->scp.sysbus = 0x0000004c;
+#endif
+#ifdef CONFIG_APRICOT_i596
+ if (MACH_IS_APRICOT)
+ lp->scp.sysbus = 0x00440000;
+#endif
+
+ lp->scp.iscp = WSWAPiscp(&(lp->iscp));
+ lp->iscp.scb = WSWAPscb(&(lp->scb));
+ lp->iscp.stat = ISCP_BUSY;
+ lp->cmd_backlog = 0;
+
+ lp->cmd_head = lp->scb.cmd = (struct i596_cmd *) I596_NULL;
+
+ if (i596_debug > 1)
+ printk("%s: starting i82596.\n", dev->name);
+
+#if !defined(CONFIG_MVME16x_NET) && !defined(CONFIG_BVME6000_NET)
+ (void) inb(ioaddr + 0x10);
+ outb(4, ioaddr + 0xf);
+#endif
+ CA(dev);
+
+ while (lp->iscp.stat)
+ if (--boguscnt == 0) {
+ printk("%s: i82596 initialization timed out with status %4.4x, cmd %4.4x.\n",
+ dev->name, lp->scb.status, lp->scb.command);
+ break;
+ }
+ lp->scb.command = 0;
+
+#ifdef CONFIG_MVME16x_NET
+ if (MACH_IS_MVME16x) {
+ volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
+
+ /* Enable ints, etc. now */
+ pcc2[0x2a] = 0x08;
+ pcc2[0x2a] = 0x55; /* Edge sensitive */
+ pcc2[0x2b] = 0x55;
+ }
+#endif
+#ifdef CONFIG_BVME6000_NET
+ if (MACH_IS_BVME6000) {
+ volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
+
+ *ethirq = 3;
+ }
+#endif
+
+ memcpy(lp->i596_config, init_setup, 14);
+ lp->set_conf.command = CmdConfigure;
+ i596_add_cmd(dev, &lp->set_conf);
+
+ memcpy(lp->eth_addr, dev->dev_addr, 6);
+ lp->set_add.command = CmdSASetup;
+ i596_add_cmd(dev, &lp->set_add);
+
+ lp->tdr.command = CmdTDR;
+ i596_add_cmd(dev, &lp->tdr);
+
+ boguscnt = 200000;
+
+ save_flags(flags);
+ cli();
+
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("%s: receive unit start timed out with status %4.4x, cmd %4.4x.\n",
+ dev->name, lp->scb.status, lp->scb.command);
+ break;
+ }
+ lp->scb.command = RX_START;
+ CA(dev);
+
+ restore_flags(flags);
+
+ boguscnt = 2000;
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("i82596 init timed out with status %4.4x, cmd %4.4x.\n",
+ lp->scb.status, lp->scb.command);
+ break;
+ }
+ return;
+}
+
+static inline int i596_rx(struct device *dev)
+{
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+ struct i596_rfd *rfd;
+ int frames = 0;
+
+ if (i596_debug > 3)
+ printk("i596_rx()\n");
+
+ rfd = WSWAPrfd(lp->scb.rfd); /* Reference next frame descriptor to check */
+
+ while ((rfd->stat) & STAT_C) { /* Loop while we have complete frames */
+ if (i596_debug > 2)
+ print_eth(rfd->data);
+
+ if ((rfd->stat) & STAT_OK) {
+ /* a good frame */
+ int pkt_len = rfd->count & 0x3fff;
+ struct sk_buff *skb = dev_alloc_skb(pkt_len);
+
+ frames++;
+
+ if (skb == NULL) {
+ printk("%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
+ lp->stats.rx_dropped++;
+ } else {
+ skb->dev = dev;
+ memcpy(skb_put(skb, pkt_len), rfd->data, pkt_len);
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ lp->stats.rx_packets++;
+ lp->stats.rx_bytes += pkt_len;
+ }
+ } else {
+ lp->stats.rx_errors++;
+ if ((rfd->stat) & 0x0001)
+ lp->stats.collisions++;
+ if ((rfd->stat) & 0x0080)
+ lp->stats.rx_length_errors++;
+ if ((rfd->stat) & 0x0100)
+ lp->stats.rx_over_errors++;
+ if ((rfd->stat) & 0x0200)
+ lp->stats.rx_fifo_errors++;
+ if ((rfd->stat) & 0x0400)
+ lp->stats.rx_frame_errors++;
+ if ((rfd->stat) & 0x0800)
+ lp->stats.rx_crc_errors++;
+ if ((rfd->stat) & 0x1000)
+ lp->stats.rx_length_errors++;
+ }
+
+ /* Clear the buffer descriptor count and EOF + F flags */
+
+ rfd->stat = 0;
+ rfd->count = 0;
+ rfd->cmd = CMD_EOL;
+ lp->rx_tail->cmd = 0;
+ lp->rx_tail = rfd;
+ lp->scb.rfd = rfd->next;
+ rfd = WSWAPrfd(lp->scb.rfd); /* Next frame descriptor to check */
+ }
+
+ if (i596_debug > 3)
+ printk("frames %d\n", frames);
+
+ return 0;
+}
+
+static inline void i596_cleanup_cmd(struct i596_private *lp)
+{
+ struct i596_cmd *ptr;
+ int boguscnt = 1000;
+
+ if (i596_debug > 4)
+ printk("i596_cleanup_cmd\n");
+
+ while (lp->cmd_head != (struct i596_cmd *) I596_NULL) {
+ ptr = lp->cmd_head;
+
+ lp->cmd_head = WSWAPcmd(lp->cmd_head->next);
+ lp->cmd_backlog--;
+
+ switch ((ptr->command) & 0x7) {
+ case CmdTx:
+ {
+ struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
+ struct sk_buff *skb = tx_cmd->skb;
+
+ dev_kfree_skb(skb);
+
+ lp->stats.tx_errors++;
+ lp->stats.tx_aborted_errors++;
+
+ ptr->next = (struct i596_cmd *) I596_NULL;
+ kfree(tx_cmd);
+ break;
+ }
+ case CmdMulticastList:
+ {
+ ptr->next = (struct i596_cmd *) I596_NULL;
+ kfree(ptr);
+ break;
+ }
+ default:
+ ptr->next = (struct i596_cmd *) I596_NULL;
+ }
+ }
+
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("i596_cleanup_cmd timed out with status %4.4x, cmd %4.4x.\n",
+ lp->scb.status, lp->scb.command);
+ break;
+ }
+ lp->scb.cmd = WSWAPcmd(lp->cmd_head);
+}
+
+static inline void i596_reset(struct device *dev, struct i596_private *lp, int ioaddr)
+{
+ int boguscnt = 1000;
+ unsigned long flags;
+
+ if (i596_debug > 1)
+ printk("i596_reset\n");
+
+ save_flags(flags);
+ cli();
+
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("i596_reset timed out with status %4.4x, cmd %4.4x.\n",
+ lp->scb.status, lp->scb.command);
+ break;
+ }
+ dev->start = 0;
+ dev->tbusy = 1;
+
+ lp->scb.command = CUC_ABORT | RX_ABORT;
+ CA(dev);
+
+ /* wait for shutdown */
+ boguscnt = 4000;
+
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("i596_reset 2 timed out with status %4.4x, cmd %4.4x.\n",
+ lp->scb.status, lp->scb.command);
+ break;
+ }
+ restore_flags(flags);
+
+ i596_cleanup_cmd(lp);
+ i596_rx(dev);
+
+ dev->start = 1;
+ dev->tbusy = 0;
+ dev->interrupt = 0;
+ init_i596_mem(dev);
+}
+
+static void i596_add_cmd(struct device *dev, struct i596_cmd *cmd)
+{
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+ int ioaddr = dev->base_addr;
+ unsigned long flags;
+ int boguscnt = 1000;
+
+ if (i596_debug > 4)
+ printk("i596_add_cmd\n");
+
+ cmd->status = 0;
+ cmd->command |= (CMD_EOL | CMD_INTR);
+ cmd->next = (struct i596_cmd *) I596_NULL;
+ save_flags(flags);
+ cli();
+
+ /*
+ * RGH 300597: Looks to me like there could be a race condition
+ * here. Just because we havn't picked up all the command items
+ * yet, doesn't mean that the 82596 hasn't finished processing
+ * them. So, we may need to do a CUC_START anyway.
+ * Maybe not. If it interrupts saying the CU is idle when there
+ * is still something in the cmd queue, the int handler with restart
+ * the CU.
+ */
+
+ if (lp->cmd_head != (struct i596_cmd *) I596_NULL) {
+ lp->cmd_tail->next = WSWAPcmd(cmd);
+ } else {
+ lp->cmd_head = cmd;
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("i596_add_cmd timed out with status %4.4x, cmd %4.4x.\n",
+ lp->scb.status, lp->scb.command);
+ break;
+ }
+ lp->scb.cmd = WSWAPcmd(cmd);
+ lp->scb.command = CUC_START;
+ CA(dev);
+ }
+ lp->cmd_tail = cmd;
+ lp->cmd_backlog++;
+
+ lp->cmd_head = WSWAPcmd(lp->scb.cmd); /* Is this redundant? RGH 300597 */
+ restore_flags(flags);
+
+ if (lp->cmd_backlog > max_cmd_backlog) {
+ unsigned long tickssofar = jiffies - lp->last_cmd;
+
+ if (tickssofar < ticks_limit)
+ return;
+
+ printk("%s: command unit timed out, status resetting.\n", dev->name);
+
+ i596_reset(dev, lp, ioaddr);
+ }
+}
+
+static int i596_open(struct device *dev)
+{
+ int i;
+
+ if (i596_debug > 1)
+ printk("%s: i596_open() irq %d.\n", dev->name, dev->irq);
+
+ if (request_irq(dev->irq, &i596_interrupt, 0, "apricot", dev))
+ return -EAGAIN;
+#ifdef CONFIG_MVME16x_NET
+ if (MACH_IS_MVME16x) {
+ if (request_irq(0x56, &i596_error, 0, "apricot_error", dev))
+ return -EAGAIN;
+ }
+#endif
+ if ((i = init_rx_bufs(dev, RX_RING_SIZE)) < RX_RING_SIZE)
+ printk("%s: only able to allocate %d receive buffers\n", dev->name, i);
+
+ if (i < 4) {
+ free_irq(dev->irq, dev);
+ return -EAGAIN;
+ }
+ dev->tbusy = 0;
+ dev->interrupt = 0;
+ dev->start = 1;
+ MOD_INC_USE_COUNT;
+
+ /* Initialize the 82596 memory */
+ init_i596_mem(dev);
+
+ return 0; /* Always succeed */
+}
+
+static int i596_start_xmit(struct sk_buff *skb, struct device *dev)
+{
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+ int ioaddr = dev->base_addr;
+ struct tx_cmd *tx_cmd;
+
+ if (i596_debug > 2)
+ printk("%s: 82596 start xmit\n", dev->name);
+
+ /* Transmitter timeout, serious problems. */
+ if (dev->tbusy) {
+ int tickssofar = jiffies - dev->trans_start;
+ if (tickssofar < 5)
+ return 1;
+ printk("%s: transmit timed out, status resetting.\n",
+ dev->name);
+ lp->stats.tx_errors++;
+ /* Try to restart the adaptor */
+ if (lp->last_restart == lp->stats.tx_packets) {
+ if (i596_debug > 1)
+ printk("Resetting board.\n");
+
+ /* Shutdown and restart */
+ i596_reset(dev, lp, ioaddr);
+ } else {
+ /* Issue a channel attention signal */
+ if (i596_debug > 1)
+ printk("Kicking board.\n");
+ lp->scb.command = CUC_START | RX_START;
+ CA(dev);
+ lp->last_restart = lp->stats.tx_packets;
+ }
+ dev->tbusy = 0;
+ dev->trans_start = jiffies;
+ }
+ if (i596_debug > 3)
+ printk("%s: i596_start_xmit() called\n", dev->name);
+
+ /* Block a timer-based transmit from overlapping. This could better be
+ done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
+ if (test_and_set_bit(0, (void *) &dev->tbusy) != 0)
+ printk("%s: Transmitter access conflict.\n", dev->name);
+ else {
+ short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
+ dev->trans_start = jiffies;
+
+ tx_cmd = (struct tx_cmd *) kmalloc((sizeof(struct tx_cmd) + sizeof(struct i596_tbd)), GFP_ATOMIC);
+ if (tx_cmd == NULL) {
+ printk("%s: i596_xmit Memory squeeze, dropping packet.\n", dev->name);
+ lp->stats.tx_dropped++;
+
+ dev_kfree_skb(skb);
+ } else {
+ struct i596_tbd *tbd = (struct i596_tbd *) (tx_cmd + 1);
+ tx_cmd->tbd = WSWAPtbd(tbd);
+ tbd->next = (struct i596_tbd *) I596_NULL;
+
+ tx_cmd->cmd.command = CMD_FLEX | CmdTx;
+ tx_cmd->skb = skb;
+
+ tx_cmd->pad = 0;
+ tx_cmd->size = 0;
+ tbd->pad = 0;
+ tbd->size = EOF | length;
+
+ tbd->data = WSWAPchar(skb->data);
+
+ if (i596_debug > 3)
+ print_eth(skb->data);
+ i596_add_cmd(dev, (struct i596_cmd *) tx_cmd);
+
+ lp->stats.tx_packets++;
+ lp->stats.tx_bytes += length;
+ }
+ }
+
+ dev->tbusy = 0;
+
+ return 0;
+}
+
+
+static void print_eth(char *add)
+{
+ int i;
+
+ printk("print_eth(%08x)\n", (unsigned int) add);
+ printk("Dest ");
+ for (i = 0; i < 6; i++)
+ printk(" %2.2X", (unsigned char) add[i]);
+ printk("\n");
+
+ printk("Source");
+ for (i = 0; i < 6; i++)
+ printk(" %2.2X", (unsigned char) add[i + 6]);
+ printk("\n");
+ printk("type %2.2X%2.2X\n", (unsigned char) add[12], (unsigned char) add[13]);
+}
+
+__initfunc(int i82596_probe(struct device *dev))
+{
+ int i;
+ struct i596_private *lp;
+ char eth_addr[6];
+
+#ifdef CONFIG_MVME16x_NET
+ if (MACH_IS_MVME16x) {
+ static int probed = 0;
+
+ if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
+ printk("Ethernet probe disabled - chip not present\n");
+ return ENODEV;
+ }
+ if (probed)
+ return ENODEV;
+ probed++;
+ memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
+ dev->base_addr = MVME_I596_BASE;
+ dev->irq = (unsigned) MVME16x_IRQ_I596;
+ }
+#endif
+#ifdef CONFIG_BVME6000_NET
+ if (MACH_IS_BVME6000) {
+ volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
+ unsigned char msr = rtc[3];
+ int i;
+
+ rtc[3] |= 0x80;
+ for (i = 0; i < 6; i++)
+ eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
+ rtc[3] = msr;
+ dev->base_addr = BVME_I596_BASE;
+ dev->irq = (unsigned) BVME_IRQ_I596;
+ }
+#endif
+#ifdef CONFIG_APRICOT_INTEL
+ int checksum = 0;
+ int ioaddr = 0x300;
+
+ /* this is easy the ethernet interface can only be at 0x300 */
+ /* first check nothing is already registered here */
+
+ if (check_region(ioaddr, I596_TOTAL_SIZE))
+ return ENODEV;
+
+ for (i = 0; i < 8; i++) {
+ eth_addr[i] = inb(ioaddr + 8 + i);
+ checksum += eth_addr[i];
+ }
+
+ /* checksum is a multiple of 0x100, got this wrong first time
+ some machines have 0x100, some 0x200. The DOS driver doesn't
+ even bother with the checksum */
+
+ if (checksum % 0x100)
+ return ENODEV;
+
+ /* Some other boards trip the checksum.. but then appear as ether
+ address 0. Trap these - AC */
+
+ if (memcmp(eth_addr, "\x00\x00\x49", 3) != 0)
+ return ENODEV;
+
+ request_region(ioaddr, I596_TOTAL_SIZE, "i596");
+
+ dev->base_addr = ioaddr;
+ dev->irq = 10;
+#endif
+ ether_setup(dev);
+ printk("%s: 82596 at %#3lx,", dev->name, dev->base_addr);
+
+ for (i = 0; i < 6; i++)
+ printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]);
+
+ printk(" IRQ %d.\n", dev->irq);
+
+ if (i596_debug > 0)
+ printk(version);
+
+ /* The APRICOT-specific entries in the device structure. */
+ dev->open = &i596_open;
+ dev->stop = &i596_close;
+ dev->hard_start_xmit = &i596_start_xmit;
+ dev->get_stats = &i596_get_stats;
+ dev->set_multicast_list = &set_multicast_list;
+
+ dev->mem_start = (int) kmalloc(sizeof(struct i596_private) + 0x0f, GFP_KERNEL);
+ /* align for scp */
+ dev->priv = (void *) ((dev->mem_start + 0xf) & 0xfffffff0);
+
+ lp = (struct i596_private *) dev->priv;
+ if (i596_debug)
+ printk("%s: lp at 0x%08lx, lp->scb at 0x%08lx\n"
+ ,dev->name, (unsigned long) lp, (unsigned long) &lp->scb);
+ memset((void *) lp, 0, sizeof(struct i596_private));
+ lp->scb.command = 0;
+ lp->scb.cmd = (struct i596_cmd *) I596_NULL;
+ lp->scb.rfd = (struct i596_rfd *) I596_NULL;
+
+ return 0;
+}
+
+static void i596_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct device *dev = dev_id;
+ struct i596_private *lp;
+ short ioaddr;
+ int boguscnt = 2000;
+ unsigned short status, ack_cmd = 0;
+
+#ifdef CONFIG_BVME6000_NET
+ if (MACH_IS_BVME6000) {
+ if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
+ i596_error(BVME_IRQ_I596, NULL, NULL);
+ return;
+ }
+ }
+#endif
+ if (dev == NULL) {
+ printk("i596_interrupt(): irq %d for unknown device.\n", irq);
+ return;
+ }
+ if (i596_debug > 3)
+ printk("%s: i596_interrupt(): irq %d\n", dev->name, irq);
+
+ if (dev->interrupt)
+ printk("%s: Re-entering the interrupt handler.\n", dev->name);
+
+ dev->interrupt = 1;
+
+ ioaddr = dev->base_addr;
+
+ lp = (struct i596_private *) dev->priv;
+
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("%s: i596 interrupt, timeout status %4.4x command %4.4x.\n", dev->name, lp->scb.status, lp->scb.command);
+ break;
+ }
+ status = lp->scb.status;
+
+ if (i596_debug > 4)
+ printk("%s: i596 interrupt, status %4.4x.\n", dev->name, status);
+
+ ack_cmd = status & 0xf000;
+
+ if ((status & 0x8000) || (status & 0x2000)) {
+ struct i596_cmd *ptr;
+
+ if ((i596_debug > 4) && (status & 0x8000))
+ printk("%s: i596 interrupt completed command.\n", dev->name);
+ if ((i596_debug > 4) && (status & 0x2000))
+ printk("%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700);
+
+ while ((lp->cmd_head != (struct i596_cmd *) I596_NULL) && (lp->cmd_head->status & STAT_C)) {
+ ptr = lp->cmd_head;
+
+ if (i596_debug > 2)
+ printk("cmd_head->status = %04x, ->command = %04x\n",
+ lp->cmd_head->status, lp->cmd_head->command);
+ lp->cmd_head = WSWAPcmd(lp->cmd_head->next);
+ lp->cmd_backlog--;
+
+ switch ((ptr->command) & 0x7) {
+ case CmdTx:
+ {
+ struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
+ struct sk_buff *skb = tx_cmd->skb;
+
+ if ((ptr->status) & STAT_OK) {
+ if (i596_debug > 2)
+ print_eth(skb->data);
+ } else {
+ lp->stats.tx_errors++;
+ if ((ptr->status) & 0x0020)
+ lp->stats.collisions++;
+ if (!((ptr->status) & 0x0040))
+ lp->stats.tx_heartbeat_errors++;
+ if ((ptr->status) & 0x0400)
+ lp->stats.tx_carrier_errors++;
+ if ((ptr->status) & 0x0800)
+ lp->stats.collisions++;
+ if ((ptr->status) & 0x1000)
+ lp->stats.tx_aborted_errors++;
+ }
+
+ dev_kfree_skb(skb);
+
+ ptr->next = (struct i596_cmd *) I596_NULL;
+ kfree(tx_cmd);
+ break;
+ }
+ case CmdMulticastList:
+ {
+ ptr->next = (struct i596_cmd *) I596_NULL;
+ kfree(ptr);
+ break;
+ }
+ case CmdTDR:
+ {
+ unsigned long status = *((unsigned long *) (ptr + 1));
+
+ if (status & 0x8000) {
+ if (i596_debug > 3)
+ printk("%s: link ok.\n", dev->name);
+ } else {
+ if (status & 0x4000)
+ printk("%s: Transceiver problem.\n", dev->name);
+ if (status & 0x2000)
+ printk("%s: Termination problem.\n", dev->name);
+ if (status & 0x1000)
+ printk("%s: Short circuit.\n", dev->name);
+
+ if (i596_debug > 1)
+ printk("%s: Time %ld.\n", dev->name, status & 0x07ff);
+ }
+ break;
+ }
+ case CmdConfigure:
+ {
+ ptr->next = (struct i596_cmd *) I596_NULL;
+ /* Zap command so set_multicast_list() knows it is free */
+ ptr->command = 0;
+ break;
+ }
+ default:
+ ptr->next = (struct i596_cmd *) I596_NULL;
+ }
+ lp->last_cmd = jiffies;
+ }
+
+ ptr = lp->cmd_head;
+ while ((ptr != (struct i596_cmd *) I596_NULL) && (ptr != lp->cmd_tail)) {
+ ptr->command &= 0x1fff;
+ ptr = WSWAPcmd(ptr->next);
+ }
+
+ if ((lp->cmd_head != (struct i596_cmd *) I596_NULL) && (dev->start))
+ ack_cmd |= CUC_START;
+ lp->scb.cmd = WSWAPcmd(lp->cmd_head);
+ }
+ if ((status & 0x1000) || (status & 0x4000)) {
+ if ((i596_debug > 4) && (status & 0x4000))
+ printk("%s: i596 interrupt received a frame.\n", dev->name);
+ /* Only RX_START if stopped - RGH 07-07-96 */
+ if (status & 0x1000) {
+ if (dev->start)
+ ack_cmd |= RX_START;
+ if (i596_debug > 1)
+ printk("%s: i596 interrupt receive unit inactive %x.\n", dev->name, status & 0x00f0);
+ }
+ i596_rx(dev);
+ }
+ /* acknowledge the interrupt */
+
+/* COMMENTED OUT <<<<<
+ if ((lp->scb.cmd != (struct i596_cmd *) I596_NULL) && (dev->start))
+ ack_cmd |= CUC_START;
+ */
+ boguscnt = 1000;
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("%s: i596 interrupt, timeout status %4.4x command %4.4x.\n", dev->name, lp->scb.status, lp->scb.command);
+ break;
+ }
+ lp->scb.command = ack_cmd;
+
+#ifdef CONFIG_MVME16x_NET
+ if (MACH_IS_MVME16x) {
+ /* Ack the interrupt */
+
+ volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
+
+ pcc2[0x2a] |= 0x08;
+ }
+#endif
+#ifdef CONFIG_BVME6000_NET
+ if (MACH_IS_BVME6000) {
+ volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
+
+ *ethirq = 1;
+ *ethirq = 3;
+ }
+#endif
+#ifdef CONFIG_APRICOT_INTEL
+ (void) inb(ioaddr + 0x10);
+ outb(4, ioaddr + 0xf);
+#endif
+ CA(dev);
+
+ if (i596_debug > 4)
+ printk("%s: exiting interrupt.\n", dev->name);
+
+ dev->interrupt = 0;
+ return;
+}
+
+static int i596_close(struct device *dev)
+{
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+ int boguscnt = 2000;
+ unsigned long flags;
+
+ dev->start = 0;
+ dev->tbusy = 1;
+
+ if (i596_debug > 1)
+ printk("%s: Shutting down ethercard, status was %4.4x.\n",
+ dev->name, lp->scb.status);
+
+ save_flags(flags);
+ cli();
+
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("%s: close1 timed timed out with status %4.4x, cmd %4.4x.\n",
+ dev->name, lp->scb.status, lp->scb.command);
+ break;
+ }
+ lp->scb.command = CUC_ABORT | RX_ABORT;
+ CA(dev);
+
+ boguscnt = 2000;
+
+ while (lp->scb.command)
+ if (--boguscnt == 0) {
+ printk("%s: close2 timed timed out with status %4.4x, cmd %4.4x.\n",
+ dev->name, lp->scb.status, lp->scb.command);
+ break;
+ }
+ restore_flags(flags);
+
+ i596_cleanup_cmd(lp);
+
+#ifdef CONFIG_MVME16x_NET
+ if (MACH_IS_MVME16x) {
+ volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
+
+ /* Disable all ints */
+ pcc2[0x28] = 1;
+ pcc2[0x2a] = 0x40;
+ pcc2[0x2b] = 0x40; /* Set snooping bits now! */
+ }
+#endif
+#ifdef CONFIG_BVME6000_NET
+ if (MACH_IS_BVME6000) {
+ volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
+
+ *ethirq = 1;
+ }
+#endif
+
+ free_irq(dev->irq, dev);
+ remove_rx_bufs(dev);
+ MOD_DEC_USE_COUNT;
+
+ return 0;
+}
+
+static struct net_device_stats *
+ i596_get_stats(struct device *dev)
+{
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+
+ return &lp->stats;
+}
+
+/*
+ * Set or clear the multicast filter for this adaptor.
+ */
+
+static void set_multicast_list(struct device *dev)
+{
+ struct i596_private *lp = (struct i596_private *) dev->priv;
+ struct i596_cmd *cmd;
+ int config = 0;
+
+ if (i596_debug > 1)
+ printk("%s: set multicast list, %d entries, promisc %s, allmulti %s\n", dev->name, dev->mc_count, dev->flags & IFF_PROMISC ? "ON" : "OFF", dev->flags & IFF_ALLMULTI ? "ON" : "OFF");
+
+ if ((dev->flags & IFF_PROMISC) && !(lp->i596_config[8] & 0x01)) {
+ lp->i596_config[8] |= 0x01;
+ config = 1;
+ }
+ if (!(dev->flags & IFF_PROMISC) && (lp->i596_config[8] & 0x01)) {
+ lp->i596_config[8] &= ~0x01;
+ config = 1;
+ }
+ if ((dev->flags & IFF_ALLMULTI) && (lp->i596_config[11] & 0x20)) {
+ lp->i596_config[11] &= ~0x20;
+ config = 1;
+ }
+ if (!(dev->flags & IFF_ALLMULTI) && !(lp->i596_config[11] & 0x20)) {
+ lp->i596_config[11] |= 0x20;
+ config = 1;
+ }
+ if (config) {
+ if (lp->set_conf.command)
+ printk("%s: config change request already queued\n",
+ dev->name);
+ else {
+ lp->set_conf.command = CmdConfigure;
+ i596_add_cmd(dev, &lp->set_conf);
+ }
+ }
+ if (dev->mc_count > 0) {
+ struct dev_mc_list *dmi;
+ unsigned char *cp;
+ cmd = (struct i596_cmd *) kmalloc(sizeof(struct i596_cmd) + 2 + dev->mc_count * 6, GFP_ATOMIC);
+ if (cmd == NULL) {
+ printk("%s: set_multicast Memory squeeze.\n", dev->name);
+ return;
+ }
+ cmd->command = CmdMulticastList;
+ *((unsigned short *) (cmd + 1)) = dev->mc_count * 6;
+ cp = ((unsigned char *) (cmd + 1)) + 2;
+ for (dmi = dev->mc_list; dmi != NULL; dmi = dmi->next) {
+ memcpy(cp, dmi->dmi_addr, 6);
+ if (i596_debug > 1)
+ printk("%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, *(cp + 0), *(cp + 1), *(cp + 2), *(cp + 3), *(cp + 4), *(cp + 5));
+ cp += 6;
+ }
+ if (i596_debug > 2)
+ print_eth(((char *) (cmd + 1)) + 2);
+ i596_add_cmd(dev, cmd);
+ }
+}
+
+#ifdef HAVE_DEVLIST
+static unsigned int i596_portlist[] __initdata =
+{0x300, 0};
+struct netdev_entry i596_drv =
+{"apricot", i82596_probe, I596_TOTAL_SIZE, apricot_portlist};
+#endif
+
+#ifdef MODULE
+static char devicename[9] =
+{0,};
+static struct device dev_apricot =
+{
+ devicename, /* device name inserted by /linux/drivers/net/net_init.c */
+ 0, 0, 0, 0,
+ 0x300, 10,
+ 0, 0, 0, NULL, i82596_probe};
+
+static int io = 0x300;
+static int irq = 10;
+MODULE_PARM(irq, "i");
+
+int init_module(void)
+{
+ dev_apricot.base_addr = io;
+ dev_apricot.irq = irq;
+ if (register_netdev(&dev_apricot) != 0)
+ return -EIO;
+ return 0;
+}
+
+void cleanup_module(void)
+{
+ unregister_netdev(&dev_apricot);
+ kfree((void *) dev_apricot.mem_start);
+ dev_apricot.priv = NULL;
+
+ /* If we don't do this, we can't re-insmod it later. */
+ release_region(dev_apricot.base_addr, I596_TOTAL_SIZE);
+}
+
+#endif /* MODULE */
+
+/*
+ * Local variables:
+ * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
+ * End:
+ */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov