mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 13:06:41 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1619 lines
41 KiB
C
1619 lines
41 KiB
C
/* 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
|
||
|
||
980825: Changed to receive directly in to sk_buffs which are
|
||
allocated at open() time. Eliminates copy on incoming frames
|
||
(small ones are still copied). Shared data now held in a
|
||
non-cached page, so we can run on 68060 in copyback mode.
|
||
|
||
TBD:
|
||
* look at deferring rx frames rather than discarding (as per tulip)
|
||
* handle tx ring full as per tulip
|
||
* performace test to tune rx_copybreak
|
||
|
||
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 General Public License as modified by SRC,
|
||
incorporated herein by reference.
|
||
|
||
The author may be reached as becker@scyld.com, or C/O
|
||
Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
|
||
|
||
*/
|
||
|
||
#include <linux/config.h>
|
||
#include <linux/module.h>
|
||
#include <linux/kernel.h>
|
||
#include <linux/string.h>
|
||
#include <linux/errno.h>
|
||
#include <linux/ioport.h>
|
||
#include <linux/slab.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 <linux/bitops.h>
|
||
|
||
#include <asm/io.h>
|
||
#include <asm/dma.h>
|
||
#include <asm/pgtable.h>
|
||
|
||
static char version[] __initdata =
|
||
"82596.c $Revision: 1.5 $\n";
|
||
|
||
#define DRV_NAME "82596"
|
||
|
||
/* DEBUG flags
|
||
*/
|
||
|
||
#define DEB_INIT 0x0001
|
||
#define DEB_PROBE 0x0002
|
||
#define DEB_SERIOUS 0x0004
|
||
#define DEB_ERRORS 0x0008
|
||
#define DEB_MULTI 0x0010
|
||
#define DEB_TDR 0x0020
|
||
#define DEB_OPEN 0x0040
|
||
#define DEB_RESET 0x0080
|
||
#define DEB_ADDCMD 0x0100
|
||
#define DEB_STATUS 0x0200
|
||
#define DEB_STARTTX 0x0400
|
||
#define DEB_RXADDR 0x0800
|
||
#define DEB_TXADDR 0x1000
|
||
#define DEB_RXFRAME 0x2000
|
||
#define DEB_INTS 0x4000
|
||
#define DEB_STRUCT 0x8000
|
||
#define DEB_ANY 0xffff
|
||
|
||
|
||
#define DEB(x,y) if (i596_debug & (x)) y
|
||
|
||
|
||
#if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
|
||
#define ENABLE_MVME16x_NET
|
||
#endif
|
||
#if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
|
||
#define ENABLE_BVME6000_NET
|
||
#endif
|
||
#if defined(CONFIG_APRICOT) || defined(CONFIG_APRICOT_MODULE)
|
||
#define ENABLE_APRICOT
|
||
#endif
|
||
|
||
#ifdef ENABLE_MVME16x_NET
|
||
#include <asm/mvme16xhw.h>
|
||
#endif
|
||
#ifdef ENABLE_BVME6000_NET
|
||
#include <asm/bvme6000hw.h>
|
||
#endif
|
||
|
||
/*
|
||
* Define various macros for Channel Attention, word swapping etc., dependent
|
||
* 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) ((struct i596_rfd *)(x))
|
||
#define WSWAPrbd(x) ((struct i596_rbd *)(x))
|
||
#define WSWAPiscp(x) ((struct i596_iscp *)(x))
|
||
#define WSWAPscb(x) ((struct i596_scb *)(x))
|
||
#define WSWAPcmd(x) ((struct i596_cmd *)(x))
|
||
#define WSWAPtbd(x) ((struct i596_tbd *)(x))
|
||
#define WSWAPchar(x) ((char *)(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 */
|
||
|
||
static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
|
||
|
||
MODULE_AUTHOR("Richard Hirst");
|
||
MODULE_DESCRIPTION("i82596 driver");
|
||
MODULE_LICENSE("GPL");
|
||
|
||
module_param(i596_debug, int, 0);
|
||
MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
|
||
|
||
|
||
/* Copy frames shorter than rx_copybreak, otherwise pass on up in
|
||
* a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
|
||
*/
|
||
static int rx_copybreak = 100;
|
||
|
||
#define PKT_BUF_SZ 1536
|
||
#define MAX_MC_CNT 64
|
||
|
||
#define I596_TOTAL_SIZE 17
|
||
|
||
#define I596_NULL ((void *)0xffffffff)
|
||
|
||
#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
|
||
|
||
#define TX_TIMEOUT 5
|
||
|
||
|
||
struct i596_reg {
|
||
unsigned short porthi;
|
||
unsigned short portlo;
|
||
unsigned long ca;
|
||
};
|
||
|
||
#define EOF 0x8000
|
||
#define SIZE_MASK 0x3fff
|
||
|
||
struct i596_tbd {
|
||
unsigned short size;
|
||
unsigned short pad;
|
||
struct i596_tbd *next;
|
||
char *data;
|
||
};
|
||
|
||
/* The command structure has two 'next' pointers; v_next is the address of
|
||
* the next command as seen by the CPU, b_next is the address of the next
|
||
* command as seen by the 82596. The b_next pointer, as used by the 82596
|
||
* always references the status field of the next command, rather than the
|
||
* v_next field, because the 82596 is unaware of v_next. It may seem more
|
||
* logical to put v_next at the end of the structure, but we cannot do that
|
||
* because the 82596 expects other fields to be there, depending on command
|
||
* type.
|
||
*/
|
||
|
||
struct i596_cmd {
|
||
struct i596_cmd *v_next; /* Address from CPUs viewpoint */
|
||
unsigned short status;
|
||
unsigned short command;
|
||
struct i596_cmd *b_next; /* Address from i596 viewpoint */
|
||
};
|
||
|
||
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 tdr_cmd {
|
||
struct i596_cmd cmd;
|
||
unsigned short status;
|
||
unsigned short pad;
|
||
};
|
||
|
||
struct mc_cmd {
|
||
struct i596_cmd cmd;
|
||
short mc_cnt;
|
||
char mc_addrs[MAX_MC_CNT*6];
|
||
};
|
||
|
||
struct sa_cmd {
|
||
struct i596_cmd cmd;
|
||
char eth_addr[8];
|
||
};
|
||
|
||
struct cf_cmd {
|
||
struct i596_cmd cmd;
|
||
char i596_config[16];
|
||
};
|
||
|
||
struct i596_rfd {
|
||
unsigned short stat;
|
||
unsigned short cmd;
|
||
struct i596_rfd *b_next; /* Address from i596 viewpoint */
|
||
struct i596_rbd *rbd;
|
||
unsigned short count;
|
||
unsigned short size;
|
||
struct i596_rfd *v_next; /* Address from CPUs viewpoint */
|
||
struct i596_rfd *v_prev;
|
||
};
|
||
|
||
struct i596_rbd {
|
||
unsigned short count;
|
||
unsigned short zero1;
|
||
struct i596_rbd *b_next;
|
||
unsigned char *b_data; /* Address from i596 viewpoint */
|
||
unsigned short size;
|
||
unsigned short zero2;
|
||
struct sk_buff *skb;
|
||
struct i596_rbd *v_next;
|
||
struct i596_rbd *b_addr; /* This rbd addr from i596 view */
|
||
unsigned char *v_data; /* Address from CPUs viewpoint */
|
||
};
|
||
|
||
#define TX_RING_SIZE 64
|
||
#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 sa_cmd sa_cmd;
|
||
struct cf_cmd cf_cmd;
|
||
struct tdr_cmd tdr_cmd;
|
||
struct mc_cmd mc_cmd;
|
||
unsigned long stat;
|
||
int last_restart __attribute__((aligned(4)));
|
||
struct i596_rfd *rfd_head;
|
||
struct i596_rbd *rbd_head;
|
||
struct i596_cmd *cmd_tail;
|
||
struct i596_cmd *cmd_head;
|
||
int cmd_backlog;
|
||
unsigned long last_cmd;
|
||
struct net_device_stats stats;
|
||
struct i596_rfd rfds[RX_RING_SIZE];
|
||
struct i596_rbd rbds[RX_RING_SIZE];
|
||
struct tx_cmd tx_cmds[TX_RING_SIZE];
|
||
struct i596_tbd tbds[TX_RING_SIZE];
|
||
int next_tx_cmd;
|
||
spinlock_t lock;
|
||
};
|
||
|
||
static 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 net_device *dev);
|
||
static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
|
||
static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs);
|
||
static int i596_close(struct net_device *dev);
|
||
static struct net_device_stats *i596_get_stats(struct net_device *dev);
|
||
static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
|
||
static void i596_tx_timeout (struct net_device *dev);
|
||
static void print_eth(unsigned char *buf, char *str);
|
||
static void set_multicast_list(struct net_device *dev);
|
||
|
||
static int rx_ring_size = RX_RING_SIZE;
|
||
static int ticks_limit = 25;
|
||
static int max_cmd_backlog = TX_RING_SIZE-1;
|
||
|
||
|
||
static inline void CA(struct net_device *dev)
|
||
{
|
||
#ifdef ENABLE_MVME16x_NET
|
||
if (MACH_IS_MVME16x) {
|
||
((struct i596_reg *) dev->base_addr)->ca = 1;
|
||
}
|
||
#endif
|
||
#ifdef ENABLE_BVME6000_NET
|
||
if (MACH_IS_BVME6000) {
|
||
volatile u32 i;
|
||
|
||
i = *(volatile u32 *) (dev->base_addr);
|
||
}
|
||
#endif
|
||
#ifdef ENABLE_APRICOT
|
||
if (MACH_IS_APRICOT) {
|
||
outw(0, (short) (dev->base_addr) + 4);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
|
||
static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
|
||
{
|
||
#ifdef ENABLE_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 ENABLE_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
|
||
}
|
||
|
||
|
||
static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
|
||
{
|
||
while (--delcnt && lp->iscp.stat)
|
||
udelay(10);
|
||
if (!delcnt) {
|
||
printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
|
||
dev->name, str, lp->scb.status, lp->scb.command);
|
||
return -1;
|
||
}
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
|
||
static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
|
||
{
|
||
while (--delcnt && lp->scb.command)
|
||
udelay(10);
|
||
if (!delcnt) {
|
||
printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
|
||
dev->name, str, lp->scb.status, lp->scb.command);
|
||
return -1;
|
||
}
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
|
||
static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
|
||
{
|
||
volatile struct i596_cmd *c = cmd;
|
||
|
||
while (--delcnt && c->command)
|
||
udelay(10);
|
||
if (!delcnt) {
|
||
printk(KERN_ERR "%s: %s.\n", dev->name, str);
|
||
return -1;
|
||
}
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
|
||
static void i596_display_data(struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
struct i596_cmd *cmd;
|
||
struct i596_rfd *rfd;
|
||
struct i596_rbd *rbd;
|
||
|
||
printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
|
||
&lp->scp, lp->scp.sysbus, lp->scp.iscp);
|
||
printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
|
||
&lp->iscp, lp->iscp.stat, lp->iscp.scb);
|
||
printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
|
||
" .cmd = %p, .rfd = %p\n",
|
||
&lp->scb, lp->scb.status, lp->scb.command,
|
||
lp->scb.cmd, lp->scb.rfd);
|
||
printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
|
||
" over %lx, rcvdt %lx, short %lx\n",
|
||
lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
|
||
lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
|
||
cmd = lp->cmd_head;
|
||
while (cmd != I596_NULL) {
|
||
printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
|
||
cmd, cmd->status, cmd->command, cmd->b_next);
|
||
cmd = cmd->v_next;
|
||
}
|
||
rfd = lp->rfd_head;
|
||
printk(KERN_ERR "rfd_head = %p\n", rfd);
|
||
do {
|
||
printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
|
||
" count %04x\n",
|
||
rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
|
||
rfd->count);
|
||
rfd = rfd->v_next;
|
||
} while (rfd != lp->rfd_head);
|
||
rbd = lp->rbd_head;
|
||
printk(KERN_ERR "rbd_head = %p\n", rbd);
|
||
do {
|
||
printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
|
||
rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
|
||
rbd = rbd->v_next;
|
||
} while (rbd != lp->rbd_head);
|
||
}
|
||
|
||
|
||
#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
|
||
static irqreturn_t i596_error(int irq, void *dev_id, struct pt_regs *regs)
|
||
{
|
||
struct net_device *dev = dev_id;
|
||
#ifdef ENABLE_MVME16x_NET
|
||
if (MACH_IS_MVME16x) {
|
||
volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
|
||
|
||
pcc2[0x28] = 1;
|
||
pcc2[0x2b] = 0x1d;
|
||
}
|
||
#endif
|
||
#ifdef ENABLE_BVME6000_NET
|
||
if (MACH_IS_BVME6000) {
|
||
volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
|
||
|
||
*ethirq = 1;
|
||
*ethirq = 3;
|
||
}
|
||
#endif
|
||
printk(KERN_ERR "%s: Error interrupt\n", dev->name);
|
||
i596_display_data(dev);
|
||
return IRQ_HANDLED;
|
||
}
|
||
#endif
|
||
|
||
static inline void init_rx_bufs(struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
int i;
|
||
struct i596_rfd *rfd;
|
||
struct i596_rbd *rbd;
|
||
|
||
/* First build the Receive Buffer Descriptor List */
|
||
|
||
for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
|
||
struct sk_buff *skb = dev_alloc_skb(PKT_BUF_SZ);
|
||
|
||
if (skb == NULL)
|
||
panic("82596: alloc_skb() failed");
|
||
skb->dev = dev;
|
||
rbd->v_next = rbd+1;
|
||
rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
|
||
rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
|
||
rbd->skb = skb;
|
||
rbd->v_data = skb->tail;
|
||
rbd->b_data = WSWAPchar(virt_to_bus(skb->tail));
|
||
rbd->size = PKT_BUF_SZ;
|
||
#ifdef __mc68000__
|
||
cache_clear(virt_to_phys(skb->tail), PKT_BUF_SZ);
|
||
#endif
|
||
}
|
||
lp->rbd_head = lp->rbds;
|
||
rbd = lp->rbds + rx_ring_size - 1;
|
||
rbd->v_next = lp->rbds;
|
||
rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
|
||
|
||
/* Now build the Receive Frame Descriptor List */
|
||
|
||
for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
|
||
rfd->rbd = I596_NULL;
|
||
rfd->v_next = rfd+1;
|
||
rfd->v_prev = rfd-1;
|
||
rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
|
||
rfd->cmd = CMD_FLEX;
|
||
}
|
||
lp->rfd_head = lp->rfds;
|
||
lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
|
||
rfd = lp->rfds;
|
||
rfd->rbd = lp->rbd_head;
|
||
rfd->v_prev = lp->rfds + rx_ring_size - 1;
|
||
rfd = lp->rfds + rx_ring_size - 1;
|
||
rfd->v_next = lp->rfds;
|
||
rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
|
||
rfd->cmd = CMD_EOL|CMD_FLEX;
|
||
}
|
||
|
||
static inline void remove_rx_bufs(struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
struct i596_rbd *rbd;
|
||
int i;
|
||
|
||
for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
|
||
if (rbd->skb == NULL)
|
||
break;
|
||
dev_kfree_skb(rbd->skb);
|
||
}
|
||
}
|
||
|
||
|
||
static void rebuild_rx_bufs(struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
int i;
|
||
|
||
/* Ensure rx frame/buffer descriptors are tidy */
|
||
|
||
for (i = 0; i < rx_ring_size; i++) {
|
||
lp->rfds[i].rbd = I596_NULL;
|
||
lp->rfds[i].cmd = CMD_FLEX;
|
||
}
|
||
lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
|
||
lp->rfd_head = lp->rfds;
|
||
lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
|
||
lp->rbd_head = lp->rbds;
|
||
lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
|
||
}
|
||
|
||
|
||
static int init_i596_mem(struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
#if !defined(ENABLE_MVME16x_NET) && !defined(ENABLE_BVME6000_NET)
|
||
short ioaddr = dev->base_addr;
|
||
#endif
|
||
unsigned long flags;
|
||
|
||
MPU_PORT(dev, PORT_RESET, NULL);
|
||
|
||
udelay(100); /* Wait 100us - seems to help */
|
||
|
||
#if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
|
||
#ifdef ENABLE_MVME16x_NET
|
||
if (MACH_IS_MVME16x) {
|
||
volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
|
||
|
||
/* Disable all ints for now */
|
||
pcc2[0x28] = 1;
|
||
pcc2[0x2a] = 0x48;
|
||
/* Following disables snooping. Snooping is not required
|
||
* as we make appropriate use of non-cached pages for
|
||
* shared data, and cache_push/cache_clear.
|
||
*/
|
||
pcc2[0x2b] = 0x08;
|
||
}
|
||
#endif
|
||
#ifdef ENABLE_BVME6000_NET
|
||
if (MACH_IS_BVME6000) {
|
||
volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
|
||
|
||
*ethirq = 1;
|
||
}
|
||
#endif
|
||
|
||
/* change the scp address */
|
||
|
||
MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
|
||
|
||
#elif defined(ENABLE_APRICOT)
|
||
|
||
{
|
||
u32 scp = virt_to_bus(&lp->scp);
|
||
|
||
/* change the scp address */
|
||
outw(0, ioaddr);
|
||
outw(0, ioaddr);
|
||
outb(4, ioaddr + 0xf);
|
||
outw(scp | 2, ioaddr);
|
||
outw(scp >> 16, ioaddr);
|
||
}
|
||
#endif
|
||
|
||
lp->last_cmd = jiffies;
|
||
|
||
#ifdef ENABLE_MVME16x_NET
|
||
if (MACH_IS_MVME16x)
|
||
lp->scp.sysbus = 0x00000054;
|
||
#endif
|
||
#ifdef ENABLE_BVME6000_NET
|
||
if (MACH_IS_BVME6000)
|
||
lp->scp.sysbus = 0x0000004c;
|
||
#endif
|
||
#ifdef ENABLE_APRICOT
|
||
if (MACH_IS_APRICOT)
|
||
lp->scp.sysbus = 0x00440000;
|
||
#endif
|
||
|
||
lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
|
||
lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
|
||
lp->iscp.stat = ISCP_BUSY;
|
||
lp->cmd_backlog = 0;
|
||
|
||
lp->cmd_head = lp->scb.cmd = I596_NULL;
|
||
|
||
#ifdef ENABLE_BVME6000_NET
|
||
if (MACH_IS_BVME6000) {
|
||
lp->scb.t_on = 7 * 25;
|
||
lp->scb.t_off = 1 * 25;
|
||
}
|
||
#endif
|
||
|
||
DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
|
||
|
||
#if defined(ENABLE_APRICOT)
|
||
(void) inb(ioaddr + 0x10);
|
||
outb(4, ioaddr + 0xf);
|
||
#endif
|
||
CA(dev);
|
||
|
||
if (wait_istat(dev,lp,1000,"initialization timed out"))
|
||
goto failed;
|
||
DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
|
||
|
||
/* Ensure rx frame/buffer descriptors are tidy */
|
||
rebuild_rx_bufs(dev);
|
||
lp->scb.command = 0;
|
||
|
||
#ifdef ENABLE_MVME16x_NET
|
||
if (MACH_IS_MVME16x) {
|
||
volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
|
||
|
||
/* Enable ints, etc. now */
|
||
pcc2[0x2a] = 0x55; /* Edge sensitive */
|
||
pcc2[0x2b] = 0x15;
|
||
}
|
||
#endif
|
||
#ifdef ENABLE_BVME6000_NET
|
||
if (MACH_IS_BVME6000) {
|
||
volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
|
||
|
||
*ethirq = 3;
|
||
}
|
||
#endif
|
||
|
||
|
||
DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
|
||
memcpy(lp->cf_cmd.i596_config, init_setup, 14);
|
||
lp->cf_cmd.cmd.command = CmdConfigure;
|
||
i596_add_cmd(dev, &lp->cf_cmd.cmd);
|
||
|
||
DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
|
||
memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
|
||
lp->sa_cmd.cmd.command = CmdSASetup;
|
||
i596_add_cmd(dev, &lp->sa_cmd.cmd);
|
||
|
||
DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
|
||
lp->tdr_cmd.cmd.command = CmdTDR;
|
||
i596_add_cmd(dev, &lp->tdr_cmd.cmd);
|
||
|
||
spin_lock_irqsave (&lp->lock, flags);
|
||
|
||
if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
|
||
spin_unlock_irqrestore (&lp->lock, flags);
|
||
goto failed;
|
||
}
|
||
DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
|
||
lp->scb.command = RX_START;
|
||
CA(dev);
|
||
|
||
spin_unlock_irqrestore (&lp->lock, flags);
|
||
|
||
if (wait_cmd(dev,lp,1000,"RX_START not processed"))
|
||
goto failed;
|
||
DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
|
||
return 0;
|
||
|
||
failed:
|
||
printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
|
||
MPU_PORT(dev, PORT_RESET, NULL);
|
||
return -1;
|
||
}
|
||
|
||
static inline int i596_rx(struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
struct i596_rfd *rfd;
|
||
struct i596_rbd *rbd;
|
||
int frames = 0;
|
||
|
||
DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
|
||
lp->rfd_head, lp->rbd_head));
|
||
|
||
rfd = lp->rfd_head; /* Ref next frame to check */
|
||
|
||
while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
|
||
if (rfd->rbd == I596_NULL)
|
||
rbd = I596_NULL;
|
||
else if (rfd->rbd == lp->rbd_head->b_addr)
|
||
rbd = lp->rbd_head;
|
||
else {
|
||
printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
|
||
/* XXX Now what? */
|
||
rbd = I596_NULL;
|
||
}
|
||
DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n",
|
||
rfd, rfd->rbd, rfd->stat));
|
||
|
||
if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
|
||
/* a good frame */
|
||
int pkt_len = rbd->count & 0x3fff;
|
||
struct sk_buff *skb = rbd->skb;
|
||
int rx_in_place = 0;
|
||
|
||
DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
|
||
frames++;
|
||
|
||
/* Check if the packet is long enough to just accept
|
||
* without copying to a properly sized skbuff.
|
||
*/
|
||
|
||
if (pkt_len > rx_copybreak) {
|
||
struct sk_buff *newskb;
|
||
|
||
/* Get fresh skbuff to replace filled one. */
|
||
newskb = dev_alloc_skb(PKT_BUF_SZ);
|
||
if (newskb == NULL) {
|
||
skb = NULL; /* drop pkt */
|
||
goto memory_squeeze;
|
||
}
|
||
/* Pass up the skb already on the Rx ring. */
|
||
skb_put(skb, pkt_len);
|
||
rx_in_place = 1;
|
||
rbd->skb = newskb;
|
||
newskb->dev = dev;
|
||
rbd->v_data = newskb->tail;
|
||
rbd->b_data = WSWAPchar(virt_to_bus(newskb->tail));
|
||
#ifdef __mc68000__
|
||
cache_clear(virt_to_phys(newskb->tail), PKT_BUF_SZ);
|
||
#endif
|
||
}
|
||
else
|
||
skb = dev_alloc_skb(pkt_len + 2);
|
||
memory_squeeze:
|
||
if (skb == NULL) {
|
||
/* XXX tulip.c can defer packets here!! */
|
||
printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
|
||
lp->stats.rx_dropped++;
|
||
}
|
||
else {
|
||
skb->dev = dev;
|
||
if (!rx_in_place) {
|
||
/* 16 byte align the data fields */
|
||
skb_reserve(skb, 2);
|
||
memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
|
||
}
|
||
skb->protocol=eth_type_trans(skb,dev);
|
||
skb->len = pkt_len;
|
||
#ifdef __mc68000__
|
||
cache_clear(virt_to_phys(rbd->skb->tail),
|
||
pkt_len);
|
||
#endif
|
||
netif_rx(skb);
|
||
dev->last_rx = jiffies;
|
||
lp->stats.rx_packets++;
|
||
lp->stats.rx_bytes+=pkt_len;
|
||
}
|
||
}
|
||
else {
|
||
DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
|
||
dev->name, rfd->stat));
|
||
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 */
|
||
|
||
if (rbd != I596_NULL && (rbd->count & 0x4000)) {
|
||
rbd->count = 0;
|
||
lp->rbd_head = rbd->v_next;
|
||
}
|
||
|
||
/* Tidy the frame descriptor, marking it as end of list */
|
||
|
||
rfd->rbd = I596_NULL;
|
||
rfd->stat = 0;
|
||
rfd->cmd = CMD_EOL|CMD_FLEX;
|
||
rfd->count = 0;
|
||
|
||
/* Remove end-of-list from old end descriptor */
|
||
|
||
rfd->v_prev->cmd = CMD_FLEX;
|
||
|
||
/* Update record of next frame descriptor to process */
|
||
|
||
lp->scb.rfd = rfd->b_next;
|
||
lp->rfd_head = rfd->v_next;
|
||
rfd = lp->rfd_head;
|
||
}
|
||
|
||
DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
|
||
{
|
||
struct i596_cmd *ptr;
|
||
|
||
while (lp->cmd_head != I596_NULL) {
|
||
ptr = lp->cmd_head;
|
||
lp->cmd_head = ptr->v_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->v_next = ptr->b_next = I596_NULL;
|
||
tx_cmd->cmd.command = 0; /* Mark as free */
|
||
break;
|
||
}
|
||
default:
|
||
ptr->v_next = ptr->b_next = I596_NULL;
|
||
}
|
||
}
|
||
|
||
wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
|
||
lp->scb.cmd = I596_NULL;
|
||
}
|
||
|
||
static inline void i596_reset(struct net_device *dev, struct i596_private *lp, int ioaddr)
|
||
{
|
||
unsigned long flags;
|
||
|
||
DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
|
||
|
||
spin_lock_irqsave (&lp->lock, flags);
|
||
|
||
wait_cmd(dev,lp,100,"i596_reset timed out");
|
||
|
||
netif_stop_queue(dev);
|
||
|
||
lp->scb.command = CUC_ABORT | RX_ABORT;
|
||
CA(dev);
|
||
|
||
/* wait for shutdown */
|
||
wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
|
||
spin_unlock_irqrestore (&lp->lock, flags);
|
||
|
||
i596_cleanup_cmd(dev,lp);
|
||
i596_rx(dev);
|
||
|
||
netif_start_queue(dev);
|
||
init_i596_mem(dev);
|
||
}
|
||
|
||
static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
int ioaddr = dev->base_addr;
|
||
unsigned long flags;
|
||
|
||
DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
|
||
|
||
cmd->status = 0;
|
||
cmd->command |= (CMD_EOL | CMD_INTR);
|
||
cmd->v_next = cmd->b_next = I596_NULL;
|
||
|
||
spin_lock_irqsave (&lp->lock, flags);
|
||
|
||
if (lp->cmd_head != I596_NULL) {
|
||
lp->cmd_tail->v_next = cmd;
|
||
lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
|
||
} else {
|
||
lp->cmd_head = cmd;
|
||
wait_cmd(dev,lp,100,"i596_add_cmd timed out");
|
||
lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
|
||
lp->scb.command = CUC_START;
|
||
CA(dev);
|
||
}
|
||
lp->cmd_tail = cmd;
|
||
lp->cmd_backlog++;
|
||
|
||
spin_unlock_irqrestore (&lp->lock, flags);
|
||
|
||
if (lp->cmd_backlog > max_cmd_backlog) {
|
||
unsigned long tickssofar = jiffies - lp->last_cmd;
|
||
|
||
if (tickssofar < ticks_limit)
|
||
return;
|
||
|
||
printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
|
||
|
||
i596_reset(dev, lp, ioaddr);
|
||
}
|
||
}
|
||
|
||
static int i596_open(struct net_device *dev)
|
||
{
|
||
int res = 0;
|
||
|
||
DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
|
||
|
||
if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
|
||
printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
|
||
return -EAGAIN;
|
||
}
|
||
#ifdef ENABLE_MVME16x_NET
|
||
if (MACH_IS_MVME16x) {
|
||
if (request_irq(0x56, i596_error, 0, "i82596_error", dev))
|
||
return -EAGAIN;
|
||
}
|
||
#endif
|
||
init_rx_bufs(dev);
|
||
|
||
netif_start_queue(dev);
|
||
|
||
/* Initialize the 82596 memory */
|
||
if (init_i596_mem(dev)) {
|
||
res = -EAGAIN;
|
||
free_irq(dev->irq, dev);
|
||
}
|
||
|
||
return res;
|
||
}
|
||
|
||
static void i596_tx_timeout (struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
int ioaddr = dev->base_addr;
|
||
|
||
/* Transmitter timeout, serious problems. */
|
||
DEB(DEB_ERRORS,printk(KERN_ERR "%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) {
|
||
DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
|
||
/* Shutdown and restart */
|
||
i596_reset (dev, lp, ioaddr);
|
||
} else {
|
||
/* Issue a channel attention signal */
|
||
DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
|
||
lp->scb.command = CUC_START | RX_START;
|
||
CA (dev);
|
||
lp->last_restart = lp->stats.tx_packets;
|
||
}
|
||
|
||
dev->trans_start = jiffies;
|
||
netif_wake_queue (dev);
|
||
}
|
||
|
||
|
||
static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
struct tx_cmd *tx_cmd;
|
||
struct i596_tbd *tbd;
|
||
short length = skb->len;
|
||
dev->trans_start = jiffies;
|
||
|
||
DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%x) called\n", dev->name,
|
||
skb->len, (unsigned int)skb->data));
|
||
|
||
if (skb->len < ETH_ZLEN) {
|
||
skb = skb_padto(skb, ETH_ZLEN);
|
||
if (skb == NULL)
|
||
return 0;
|
||
length = ETH_ZLEN;
|
||
}
|
||
netif_stop_queue(dev);
|
||
|
||
tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
|
||
tbd = lp->tbds + lp->next_tx_cmd;
|
||
|
||
if (tx_cmd->cmd.command) {
|
||
printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
|
||
dev->name);
|
||
lp->stats.tx_dropped++;
|
||
|
||
dev_kfree_skb(skb);
|
||
} else {
|
||
if (++lp->next_tx_cmd == TX_RING_SIZE)
|
||
lp->next_tx_cmd = 0;
|
||
tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
|
||
tbd->next = 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(virt_to_bus(skb->data));
|
||
|
||
#ifdef __mc68000__
|
||
cache_push(virt_to_phys(skb->data), length);
|
||
#endif
|
||
DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
|
||
i596_add_cmd(dev, &tx_cmd->cmd);
|
||
|
||
lp->stats.tx_packets++;
|
||
lp->stats.tx_bytes += length;
|
||
}
|
||
|
||
netif_start_queue(dev);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void print_eth(unsigned char *add, char *str)
|
||
{
|
||
int i;
|
||
|
||
printk(KERN_DEBUG "i596 0x%p, ", add);
|
||
for (i = 0; i < 6; i++)
|
||
printk(" %02X", add[i + 6]);
|
||
printk(" -->");
|
||
for (i = 0; i < 6; i++)
|
||
printk(" %02X", add[i]);
|
||
printk(" %02X%02X, %s\n", add[12], add[13], str);
|
||
}
|
||
|
||
static int io = 0x300;
|
||
static int irq = 10;
|
||
|
||
struct net_device * __init i82596_probe(int unit)
|
||
{
|
||
struct net_device *dev;
|
||
int i;
|
||
struct i596_private *lp;
|
||
char eth_addr[8];
|
||
static int probed;
|
||
int err;
|
||
|
||
if (probed)
|
||
return ERR_PTR(-ENODEV);
|
||
probed++;
|
||
|
||
dev = alloc_etherdev(0);
|
||
if (!dev)
|
||
return ERR_PTR(-ENOMEM);
|
||
|
||
if (unit >= 0) {
|
||
sprintf(dev->name, "eth%d", unit);
|
||
netdev_boot_setup_check(dev);
|
||
} else {
|
||
dev->base_addr = io;
|
||
dev->irq = irq;
|
||
}
|
||
|
||
#ifdef ENABLE_MVME16x_NET
|
||
if (MACH_IS_MVME16x) {
|
||
if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
|
||
printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
|
||
err = -ENODEV;
|
||
goto out;
|
||
}
|
||
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 ENABLE_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 ENABLE_APRICOT
|
||
{
|
||
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 (!request_region(ioaddr, I596_TOTAL_SIZE, DRV_NAME)) {
|
||
printk(KERN_ERR "82596: IO address 0x%04x in use\n", ioaddr);
|
||
err = -EBUSY;
|
||
goto out;
|
||
}
|
||
|
||
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.
|
||
Some other boards trip the checksum.. but then appear as
|
||
ether address 0. Trap these - AC */
|
||
|
||
if ((checksum % 0x100) ||
|
||
(memcmp(eth_addr, "\x00\x00\x49", 3) != 0)) {
|
||
err = -ENODEV;
|
||
goto out1;
|
||
}
|
||
|
||
dev->base_addr = ioaddr;
|
||
dev->irq = 10;
|
||
}
|
||
#endif
|
||
dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
|
||
if (!dev->mem_start) {
|
||
err = -ENOMEM;
|
||
goto out1;
|
||
}
|
||
|
||
DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
|
||
|
||
for (i = 0; i < 6; i++)
|
||
DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
|
||
|
||
DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
|
||
|
||
DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
|
||
|
||
/* The 82596-specific entries in the device structure. */
|
||
SET_MODULE_OWNER(dev);
|
||
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->tx_timeout = i596_tx_timeout;
|
||
dev->watchdog_timeo = TX_TIMEOUT;
|
||
|
||
dev->priv = (void *)(dev->mem_start);
|
||
|
||
lp = dev->priv;
|
||
DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%d bytes), lp->scb at 0x%08lx\n",
|
||
dev->name, (unsigned long)lp,
|
||
sizeof(struct i596_private), (unsigned long)&lp->scb));
|
||
memset((void *) lp, 0, sizeof(struct i596_private));
|
||
|
||
#ifdef __mc68000__
|
||
cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
|
||
cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
|
||
kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
|
||
#endif
|
||
lp->scb.command = 0;
|
||
lp->scb.cmd = I596_NULL;
|
||
lp->scb.rfd = I596_NULL;
|
||
spin_lock_init(&lp->lock);
|
||
|
||
err = register_netdev(dev);
|
||
if (err)
|
||
goto out2;
|
||
return dev;
|
||
out2:
|
||
#ifdef __mc68000__
|
||
/* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
|
||
* XXX which may be invalid (CONFIG_060_WRITETHROUGH)
|
||
*/
|
||
kernel_set_cachemode((void *)(dev->mem_start), 4096,
|
||
IOMAP_FULL_CACHING);
|
||
#endif
|
||
free_page ((u32)(dev->mem_start));
|
||
out1:
|
||
#ifdef ENABLE_APRICOT
|
||
release_region(dev->base_addr, I596_TOTAL_SIZE);
|
||
#endif
|
||
out:
|
||
free_netdev(dev);
|
||
return ERR_PTR(err);
|
||
}
|
||
|
||
static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
||
{
|
||
struct net_device *dev = dev_id;
|
||
struct i596_private *lp;
|
||
short ioaddr;
|
||
unsigned short status, ack_cmd = 0;
|
||
int handled = 0;
|
||
|
||
#ifdef ENABLE_BVME6000_NET
|
||
if (MACH_IS_BVME6000) {
|
||
if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
|
||
i596_error(irq, dev_id, regs);
|
||
return IRQ_HANDLED;
|
||
}
|
||
}
|
||
#endif
|
||
if (dev == NULL) {
|
||
printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
|
||
return IRQ_NONE;
|
||
}
|
||
|
||
ioaddr = dev->base_addr;
|
||
lp = dev->priv;
|
||
|
||
spin_lock (&lp->lock);
|
||
|
||
wait_cmd(dev,lp,100,"i596 interrupt, timeout");
|
||
status = lp->scb.status;
|
||
|
||
DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
|
||
dev->name, irq, status));
|
||
|
||
ack_cmd = status & 0xf000;
|
||
|
||
if ((status & 0x8000) || (status & 0x2000)) {
|
||
struct i596_cmd *ptr;
|
||
|
||
handled = 1;
|
||
if ((status & 0x8000))
|
||
DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
|
||
if ((status & 0x2000))
|
||
DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
|
||
|
||
while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
|
||
ptr = lp->cmd_head;
|
||
|
||
DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
|
||
lp->cmd_head->status, lp->cmd_head->command));
|
||
lp->cmd_head = ptr->v_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) {
|
||
DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
|
||
} 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_irq(skb);
|
||
|
||
tx_cmd->cmd.command = 0; /* Mark free */
|
||
break;
|
||
}
|
||
case CmdTDR:
|
||
{
|
||
unsigned short status = ((struct tdr_cmd *)ptr)->status;
|
||
|
||
if (status & 0x8000) {
|
||
DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
|
||
} else {
|
||
if (status & 0x4000)
|
||
printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
|
||
if (status & 0x2000)
|
||
printk(KERN_ERR "%s: Termination problem.\n", dev->name);
|
||
if (status & 0x1000)
|
||
printk(KERN_ERR "%s: Short circuit.\n", dev->name);
|
||
|
||
DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
|
||
}
|
||
break;
|
||
}
|
||
case CmdConfigure:
|
||
case CmdMulticastList:
|
||
/* Zap command so set_multicast_list() knows it is free */
|
||
ptr->command = 0;
|
||
break;
|
||
}
|
||
ptr->v_next = ptr->b_next = I596_NULL;
|
||
lp->last_cmd = jiffies;
|
||
}
|
||
|
||
ptr = lp->cmd_head;
|
||
while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
|
||
ptr->command &= 0x1fff;
|
||
ptr = ptr->v_next;
|
||
}
|
||
|
||
if ((lp->cmd_head != I596_NULL))
|
||
ack_cmd |= CUC_START;
|
||
lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
|
||
}
|
||
if ((status & 0x1000) || (status & 0x4000)) {
|
||
if ((status & 0x4000))
|
||
DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
|
||
i596_rx(dev);
|
||
/* Only RX_START if stopped - RGH 07-07-96 */
|
||
if (status & 0x1000) {
|
||
if (netif_running(dev)) {
|
||
DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
|
||
ack_cmd |= RX_START;
|
||
lp->stats.rx_errors++;
|
||
lp->stats.rx_fifo_errors++;
|
||
rebuild_rx_bufs(dev);
|
||
}
|
||
}
|
||
}
|
||
wait_cmd(dev,lp,100,"i596 interrupt, timeout");
|
||
lp->scb.command = ack_cmd;
|
||
|
||
#ifdef ENABLE_MVME16x_NET
|
||
if (MACH_IS_MVME16x) {
|
||
/* Ack the interrupt */
|
||
|
||
volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
|
||
|
||
pcc2[0x2a] |= 0x08;
|
||
}
|
||
#endif
|
||
#ifdef ENABLE_BVME6000_NET
|
||
if (MACH_IS_BVME6000) {
|
||
volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
|
||
|
||
*ethirq = 1;
|
||
*ethirq = 3;
|
||
}
|
||
#endif
|
||
#ifdef ENABLE_APRICOT
|
||
(void) inb(ioaddr + 0x10);
|
||
outb(4, ioaddr + 0xf);
|
||
#endif
|
||
CA(dev);
|
||
|
||
DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
|
||
|
||
spin_unlock (&lp->lock);
|
||
return IRQ_RETVAL(handled);
|
||
}
|
||
|
||
static int i596_close(struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
unsigned long flags;
|
||
|
||
netif_stop_queue(dev);
|
||
|
||
DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
|
||
dev->name, lp->scb.status));
|
||
|
||
spin_lock_irqsave(&lp->lock, flags);
|
||
|
||
wait_cmd(dev,lp,100,"close1 timed out");
|
||
lp->scb.command = CUC_ABORT | RX_ABORT;
|
||
CA(dev);
|
||
|
||
wait_cmd(dev,lp,100,"close2 timed out");
|
||
|
||
spin_unlock_irqrestore(&lp->lock, flags);
|
||
DEB(DEB_STRUCT,i596_display_data(dev));
|
||
i596_cleanup_cmd(dev,lp);
|
||
|
||
#ifdef ENABLE_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 ENABLE_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);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static struct net_device_stats *
|
||
i596_get_stats(struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
|
||
return &lp->stats;
|
||
}
|
||
|
||
/*
|
||
* Set or clear the multicast filter for this adaptor.
|
||
*/
|
||
|
||
static void set_multicast_list(struct net_device *dev)
|
||
{
|
||
struct i596_private *lp = dev->priv;
|
||
int config = 0, cnt;
|
||
|
||
DEB(DEB_MULTI,printk(KERN_DEBUG "%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 (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
|
||
return;
|
||
|
||
if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
|
||
lp->cf_cmd.i596_config[8] |= 0x01;
|
||
config = 1;
|
||
}
|
||
if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
|
||
lp->cf_cmd.i596_config[8] &= ~0x01;
|
||
config = 1;
|
||
}
|
||
if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
|
||
lp->cf_cmd.i596_config[11] &= ~0x20;
|
||
config = 1;
|
||
}
|
||
if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
|
||
lp->cf_cmd.i596_config[11] |= 0x20;
|
||
config = 1;
|
||
}
|
||
if (config) {
|
||
lp->cf_cmd.cmd.command = CmdConfigure;
|
||
i596_add_cmd(dev, &lp->cf_cmd.cmd);
|
||
}
|
||
|
||
cnt = dev->mc_count;
|
||
if (cnt > MAX_MC_CNT)
|
||
{
|
||
cnt = MAX_MC_CNT;
|
||
printk(KERN_ERR "%s: Only %d multicast addresses supported",
|
||
dev->name, cnt);
|
||
}
|
||
|
||
if (dev->mc_count > 0) {
|
||
struct dev_mc_list *dmi;
|
||
unsigned char *cp;
|
||
struct mc_cmd *cmd;
|
||
|
||
if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
|
||
return;
|
||
cmd = &lp->mc_cmd;
|
||
cmd->cmd.command = CmdMulticastList;
|
||
cmd->mc_cnt = dev->mc_count * 6;
|
||
cp = cmd->mc_addrs;
|
||
for (dmi = dev->mc_list; cnt && dmi != NULL; dmi = dmi->next, cnt--, cp += 6) {
|
||
memcpy(cp, dmi->dmi_addr, 6);
|
||
if (i596_debug > 1)
|
||
DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %02x:%02x:%02x:%02x:%02x:%02x\n",
|
||
dev->name, cp[0],cp[1],cp[2],cp[3],cp[4],cp[5]));
|
||
}
|
||
i596_add_cmd(dev, &cmd->cmd);
|
||
}
|
||
}
|
||
|
||
#ifdef MODULE
|
||
static struct net_device *dev_82596;
|
||
|
||
#ifdef ENABLE_APRICOT
|
||
module_param(irq, int, 0);
|
||
MODULE_PARM_DESC(irq, "Apricot IRQ number");
|
||
#endif
|
||
|
||
static int debug = -1;
|
||
module_param(debug, int, 0);
|
||
MODULE_PARM_DESC(debug, "i82596 debug mask");
|
||
|
||
int init_module(void)
|
||
{
|
||
if (debug >= 0)
|
||
i596_debug = debug;
|
||
dev_82596 = i82596_probe(-1);
|
||
if (IS_ERR(dev_82596))
|
||
return PTR_ERR(dev_82596);
|
||
return 0;
|
||
}
|
||
|
||
void cleanup_module(void)
|
||
{
|
||
unregister_netdev(dev_82596);
|
||
#ifdef __mc68000__
|
||
/* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
|
||
* XXX which may be invalid (CONFIG_060_WRITETHROUGH)
|
||
*/
|
||
|
||
kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
|
||
IOMAP_FULL_CACHING);
|
||
#endif
|
||
free_page ((u32)(dev_82596->mem_start));
|
||
#ifdef ENABLE_APRICOT
|
||
/* If we don't do this, we can't re-insmod it later. */
|
||
release_region(dev_82596->base_addr, I596_TOTAL_SIZE);
|
||
#endif
|
||
free_netdev(dev_82596);
|
||
}
|
||
|
||
#endif /* MODULE */
|
||
|
||
/*
|
||
* Local variables:
|
||
* compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 82596.c"
|
||
* End:
|
||
*/
|