/* lasi_82596.c -- driver for the intel 82596 ethernet controller, as
|
munged into HPPA boxen .
|
|
This driver is based upon 82596.c, original credits are below...
|
but there were too many hoops which HP wants jumped through to
|
keep this code in there in a sane manner.
|
|
3 primary sources of the mess --
|
1) hppa needs *lots* of cacheline flushing to keep this kind of
|
MMIO running.
|
|
2) The 82596 needs to see all of its pointers as their physical
|
address. Thus virt_to_bus/bus_to_virt are *everywhere*.
|
|
3) The implementation HP is using seems to be significantly pickier
|
about when and how the command and RX units are started. some
|
command ordering was changed.
|
|
Examination of the mach driver leads one to believe that there
|
might be a saner way to pull this off... anyone who feels like a
|
full rewrite can be my guest.
|
|
Split 02/13/2000 Sam Creasey (sammy@oh.verio.com)
|
|
02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de)
|
03/02/2000 changes for better/correct(?) cache-flushing (deller)
|
*/
|
|
/* 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
|
* performance 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/module.h>
|
#include <linux/kernel.h>
|
#include <linux/string.h>
|
#include <linux/errno.h>
|
#include <linux/ioport.h>
|
#include <linux/interrupt.h>
|
#include <linux/delay.h>
|
#include <linux/netdevice.h>
|
#include <linux/etherdevice.h>
|
#include <linux/skbuff.h>
|
#include <linux/types.h>
|
#include <linux/bitops.h>
|
#include <linux/dma-mapping.h>
|
#include <linux/io.h>
|
#include <linux/irq.h>
|
#include <linux/gfp.h>
|
|
/* 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; }
|
|
|
/*
|
* 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);
|
|
/* 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 ISCP_BUSY 0x0001
|
|
#define I596_NULL ((u32)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 (HZ/20)
|
|
|
struct i596_reg {
|
unsigned short porthi;
|
unsigned short portlo;
|
u32 ca;
|
};
|
|
#define EOF 0x8000
|
#define SIZE_MASK 0x3fff
|
|
struct i596_tbd {
|
unsigned short size;
|
unsigned short pad;
|
u32 next;
|
u32 data;
|
u32 cache_pad[5]; /* Total 32 bytes... */
|
};
|
|
/* 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;
|
u32 b_next; /* Address from i596 viewpoint */
|
};
|
|
struct tx_cmd {
|
struct i596_cmd cmd;
|
u32 tbd;
|
unsigned short size;
|
unsigned short pad;
|
struct sk_buff *skb; /* So we can free it after tx */
|
dma_addr_t dma_addr;
|
#ifdef __LP64__
|
u32 cache_pad[6]; /* Total 64 bytes... */
|
#else
|
u32 cache_pad[1]; /* Total 32 bytes... */
|
#endif
|
};
|
|
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;
|
u32 b_next; /* Address from i596 viewpoint */
|
u32 rbd;
|
unsigned short count;
|
unsigned short size;
|
struct i596_rfd *v_next; /* Address from CPUs viewpoint */
|
struct i596_rfd *v_prev;
|
#ifndef __LP64__
|
u32 cache_pad[2]; /* Total 32 bytes... */
|
#endif
|
};
|
|
struct i596_rbd {
|
/* hardware data */
|
unsigned short count;
|
unsigned short zero1;
|
u32 b_next;
|
u32 b_data; /* Address from i596 viewpoint */
|
unsigned short size;
|
unsigned short zero2;
|
/* driver data */
|
struct sk_buff *skb;
|
struct i596_rbd *v_next;
|
u32 b_addr; /* This rbd addr from i596 view */
|
unsigned char *v_data; /* Address from CPUs viewpoint */
|
/* Total 32 bytes... */
|
#ifdef __LP64__
|
u32 cache_pad[4];
|
#endif
|
};
|
|
/* These values as chosen so struct i596_dma fits in one page... */
|
|
#define TX_RING_SIZE 32
|
#define RX_RING_SIZE 16
|
|
struct i596_scb {
|
unsigned short status;
|
unsigned short command;
|
u32 cmd;
|
u32 rfd;
|
u32 crc_err;
|
u32 align_err;
|
u32 resource_err;
|
u32 over_err;
|
u32 rcvdt_err;
|
u32 short_err;
|
unsigned short t_on;
|
unsigned short t_off;
|
};
|
|
struct i596_iscp {
|
u32 stat;
|
u32 scb;
|
};
|
|
struct i596_scp {
|
u32 sysbus;
|
u32 pad;
|
u32 iscp;
|
};
|
|
struct i596_dma {
|
struct i596_scp scp __attribute__((aligned(32)));
|
volatile struct i596_iscp iscp __attribute__((aligned(32)));
|
volatile struct i596_scb scb __attribute__((aligned(32)));
|
struct sa_cmd sa_cmd __attribute__((aligned(32)));
|
struct cf_cmd cf_cmd __attribute__((aligned(32)));
|
struct tdr_cmd tdr_cmd __attribute__((aligned(32)));
|
struct mc_cmd mc_cmd __attribute__((aligned(32)));
|
struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32)));
|
struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32)));
|
struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32)));
|
struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32)));
|
};
|
|
struct i596_private {
|
struct i596_dma *dma;
|
u32 stat;
|
int last_restart;
|
struct i596_rfd *rfd_head;
|
struct i596_rbd *rbd_head;
|
struct i596_cmd *cmd_tail;
|
struct i596_cmd *cmd_head;
|
int cmd_backlog;
|
u32 last_cmd;
|
int next_tx_cmd;
|
int options;
|
spinlock_t lock; /* serialize access to chip */
|
dma_addr_t dma_addr;
|
void __iomem *mpu_port;
|
void __iomem *ca;
|
};
|
|
static const char init_setup[] =
|
{
|
0x8E, /* length, prefetch on */
|
0xC8, /* fifo to 8, monitor off */
|
0x80, /* don't save bad frames */
|
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 netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
|
static irqreturn_t i596_interrupt(int irq, void *dev_id);
|
static int i596_close(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, unsigned int txqueue);
|
static void print_eth(unsigned char *buf, char *str);
|
static void set_multicast_list(struct net_device *dev);
|
static inline void ca(struct net_device *dev);
|
static void mpu_port(struct net_device *dev, int c, dma_addr_t x);
|
|
static int rx_ring_size = RX_RING_SIZE;
|
static int ticks_limit = 100;
|
static int max_cmd_backlog = TX_RING_SIZE-1;
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
static void i596_poll_controller(struct net_device *dev);
|
#endif
|
|
static inline dma_addr_t virt_to_dma(struct i596_private *lp, volatile void *v)
|
{
|
return lp->dma_addr + ((unsigned long)v - (unsigned long)lp->dma);
|
}
|
|
#ifdef NONCOHERENT_DMA
|
static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr,
|
size_t len)
|
{
|
dma_sync_single_for_device(ndev->dev.parent,
|
virt_to_dma(netdev_priv(ndev), addr), len,
|
DMA_BIDIRECTIONAL);
|
}
|
|
static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr,
|
size_t len)
|
{
|
dma_sync_single_for_cpu(ndev->dev.parent,
|
virt_to_dma(netdev_priv(ndev), addr), len,
|
DMA_BIDIRECTIONAL);
|
}
|
#else
|
static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr,
|
size_t len)
|
{
|
}
|
static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr,
|
size_t len)
|
{
|
}
|
#endif /* NONCOHERENT_DMA */
|
|
static inline int wait_istat(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str)
|
{
|
dma_sync_cpu(dev, &(dma->iscp), sizeof(struct i596_iscp));
|
while (--delcnt && dma->iscp.stat) {
|
udelay(10);
|
dma_sync_cpu(dev, &(dma->iscp), sizeof(struct i596_iscp));
|
}
|
if (!delcnt) {
|
printk(KERN_ERR "%s: %s, iscp.stat %04x, didn't clear\n",
|
dev->name, str, SWAP16(dma->iscp.stat));
|
return -1;
|
} else
|
return 0;
|
}
|
|
|
static inline int wait_cmd(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str)
|
{
|
dma_sync_cpu(dev, &(dma->scb), sizeof(struct i596_scb));
|
while (--delcnt && dma->scb.command) {
|
udelay(10);
|
dma_sync_cpu(dev, &(dma->scb), sizeof(struct i596_scb));
|
}
|
if (!delcnt) {
|
printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
|
dev->name, str,
|
SWAP16(dma->scb.status),
|
SWAP16(dma->scb.command));
|
return -1;
|
} else
|
return 0;
|
}
|
|
|
static void i596_display_data(struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
struct i596_dma *dma = lp->dma;
|
struct i596_cmd *cmd;
|
struct i596_rfd *rfd;
|
struct i596_rbd *rbd;
|
|
printk(KERN_DEBUG "lp and scp at %p, .sysbus = %08x, .iscp = %08x\n",
|
&dma->scp, dma->scp.sysbus, SWAP32(dma->scp.iscp));
|
printk(KERN_DEBUG "iscp at %p, iscp.stat = %08x, .scb = %08x\n",
|
&dma->iscp, SWAP32(dma->iscp.stat), SWAP32(dma->iscp.scb));
|
printk(KERN_DEBUG "scb at %p, scb.status = %04x, .command = %04x,"
|
" .cmd = %08x, .rfd = %08x\n",
|
&dma->scb, SWAP16(dma->scb.status), SWAP16(dma->scb.command),
|
SWAP16(dma->scb.cmd), SWAP32(dma->scb.rfd));
|
printk(KERN_DEBUG " errors: crc %x, align %x, resource %x,"
|
" over %x, rcvdt %x, short %x\n",
|
SWAP32(dma->scb.crc_err), SWAP32(dma->scb.align_err),
|
SWAP32(dma->scb.resource_err), SWAP32(dma->scb.over_err),
|
SWAP32(dma->scb.rcvdt_err), SWAP32(dma->scb.short_err));
|
cmd = lp->cmd_head;
|
while (cmd != NULL) {
|
printk(KERN_DEBUG
|
"cmd at %p, .status = %04x, .command = %04x,"
|
" .b_next = %08x\n",
|
cmd, SWAP16(cmd->status), SWAP16(cmd->command),
|
SWAP32(cmd->b_next));
|
cmd = cmd->v_next;
|
}
|
rfd = lp->rfd_head;
|
printk(KERN_DEBUG "rfd_head = %p\n", rfd);
|
do {
|
printk(KERN_DEBUG
|
" %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x,"
|
" count %04x\n",
|
rfd, SWAP16(rfd->stat), SWAP16(rfd->cmd),
|
SWAP32(rfd->b_next), SWAP32(rfd->rbd),
|
SWAP16(rfd->count));
|
rfd = rfd->v_next;
|
} while (rfd != lp->rfd_head);
|
rbd = lp->rbd_head;
|
printk(KERN_DEBUG "rbd_head = %p\n", rbd);
|
do {
|
printk(KERN_DEBUG
|
" %p .count %04x, b_next %08x, b_data %08x,"
|
" size %04x\n",
|
rbd, SWAP16(rbd->count), SWAP32(rbd->b_next),
|
SWAP32(rbd->b_data), SWAP16(rbd->size));
|
rbd = rbd->v_next;
|
} while (rbd != lp->rbd_head);
|
dma_sync_cpu(dev, dma, sizeof(struct i596_dma));
|
}
|
|
static inline int init_rx_bufs(struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
struct i596_dma *dma = lp->dma;
|
int i;
|
struct i596_rfd *rfd;
|
struct i596_rbd *rbd;
|
|
/* First build the Receive Buffer Descriptor List */
|
|
for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) {
|
dma_addr_t dma_addr;
|
struct sk_buff *skb;
|
|
skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ);
|
if (skb == NULL)
|
return -1;
|
dma_addr = dma_map_single(dev->dev.parent, skb->data,
|
PKT_BUF_SZ, DMA_FROM_DEVICE);
|
rbd->v_next = rbd+1;
|
rbd->b_next = SWAP32(virt_to_dma(lp, rbd+1));
|
rbd->b_addr = SWAP32(virt_to_dma(lp, rbd));
|
rbd->skb = skb;
|
rbd->v_data = skb->data;
|
rbd->b_data = SWAP32(dma_addr);
|
rbd->size = SWAP16(PKT_BUF_SZ);
|
}
|
lp->rbd_head = dma->rbds;
|
rbd = dma->rbds + rx_ring_size - 1;
|
rbd->v_next = dma->rbds;
|
rbd->b_next = SWAP32(virt_to_dma(lp, dma->rbds));
|
|
/* Now build the Receive Frame Descriptor List */
|
|
for (i = 0, rfd = dma->rfds; i < rx_ring_size; i++, rfd++) {
|
rfd->rbd = I596_NULL;
|
rfd->v_next = rfd+1;
|
rfd->v_prev = rfd-1;
|
rfd->b_next = SWAP32(virt_to_dma(lp, rfd+1));
|
rfd->cmd = SWAP16(CMD_FLEX);
|
}
|
lp->rfd_head = dma->rfds;
|
dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds));
|
rfd = dma->rfds;
|
rfd->rbd = SWAP32(virt_to_dma(lp, lp->rbd_head));
|
rfd->v_prev = dma->rfds + rx_ring_size - 1;
|
rfd = dma->rfds + rx_ring_size - 1;
|
rfd->v_next = dma->rfds;
|
rfd->b_next = SWAP32(virt_to_dma(lp, dma->rfds));
|
rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX);
|
|
dma_sync_dev(dev, dma, sizeof(struct i596_dma));
|
return 0;
|
}
|
|
static inline void remove_rx_bufs(struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
struct i596_rbd *rbd;
|
int i;
|
|
for (i = 0, rbd = lp->dma->rbds; i < rx_ring_size; i++, rbd++) {
|
if (rbd->skb == NULL)
|
break;
|
dma_unmap_single(dev->dev.parent,
|
(dma_addr_t)SWAP32(rbd->b_data),
|
PKT_BUF_SZ, DMA_FROM_DEVICE);
|
dev_kfree_skb(rbd->skb);
|
}
|
}
|
|
|
static void rebuild_rx_bufs(struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
struct i596_dma *dma = lp->dma;
|
int i;
|
|
/* Ensure rx frame/buffer descriptors are tidy */
|
|
for (i = 0; i < rx_ring_size; i++) {
|
dma->rfds[i].rbd = I596_NULL;
|
dma->rfds[i].cmd = SWAP16(CMD_FLEX);
|
}
|
dma->rfds[rx_ring_size-1].cmd = SWAP16(CMD_EOL|CMD_FLEX);
|
lp->rfd_head = dma->rfds;
|
dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds));
|
lp->rbd_head = dma->rbds;
|
dma->rfds[0].rbd = SWAP32(virt_to_dma(lp, dma->rbds));
|
|
dma_sync_dev(dev, dma, sizeof(struct i596_dma));
|
}
|
|
|
static int init_i596_mem(struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
struct i596_dma *dma = lp->dma;
|
unsigned long flags;
|
|
mpu_port(dev, PORT_RESET, 0);
|
udelay(100); /* Wait 100us - seems to help */
|
|
/* change the scp address */
|
|
lp->last_cmd = jiffies;
|
|
dma->scp.sysbus = SYSBUS;
|
dma->scp.iscp = SWAP32(virt_to_dma(lp, &(dma->iscp)));
|
dma->iscp.scb = SWAP32(virt_to_dma(lp, &(dma->scb)));
|
dma->iscp.stat = SWAP32(ISCP_BUSY);
|
lp->cmd_backlog = 0;
|
|
lp->cmd_head = NULL;
|
dma->scb.cmd = I596_NULL;
|
|
DEB(DEB_INIT, printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
|
|
dma_sync_dev(dev, &(dma->scp), sizeof(struct i596_scp));
|
dma_sync_dev(dev, &(dma->iscp), sizeof(struct i596_iscp));
|
dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb));
|
|
mpu_port(dev, PORT_ALTSCP, virt_to_dma(lp, &dma->scp));
|
ca(dev);
|
if (wait_istat(dev, dma, 1000, "initialization timed out"))
|
goto failed;
|
DEB(DEB_INIT, printk(KERN_DEBUG
|
"%s: i82596 initialization successful\n",
|
dev->name));
|
|
if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
|
printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
|
goto failed;
|
}
|
|
/* Ensure rx frame/buffer descriptors are tidy */
|
rebuild_rx_bufs(dev);
|
|
dma->scb.command = 0;
|
dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb));
|
|
DEB(DEB_INIT, printk(KERN_DEBUG
|
"%s: queuing CmdConfigure\n", dev->name));
|
memcpy(dma->cf_cmd.i596_config, init_setup, 14);
|
dma->cf_cmd.cmd.command = SWAP16(CmdConfigure);
|
dma_sync_dev(dev, &(dma->cf_cmd), sizeof(struct cf_cmd));
|
i596_add_cmd(dev, &dma->cf_cmd.cmd);
|
|
DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
|
memcpy(dma->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN);
|
dma->sa_cmd.cmd.command = SWAP16(CmdSASetup);
|
dma_sync_dev(dev, &(dma->sa_cmd), sizeof(struct sa_cmd));
|
i596_add_cmd(dev, &dma->sa_cmd.cmd);
|
|
DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
|
dma->tdr_cmd.cmd.command = SWAP16(CmdTDR);
|
dma_sync_dev(dev, &(dma->tdr_cmd), sizeof(struct tdr_cmd));
|
i596_add_cmd(dev, &dma->tdr_cmd.cmd);
|
|
spin_lock_irqsave (&lp->lock, flags);
|
|
if (wait_cmd(dev, dma, 1000, "timed out waiting to issue RX_START")) {
|
spin_unlock_irqrestore (&lp->lock, flags);
|
goto failed_free_irq;
|
}
|
DEB(DEB_INIT, printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
|
dma->scb.command = SWAP16(RX_START);
|
dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds));
|
dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb));
|
|
ca(dev);
|
|
spin_unlock_irqrestore (&lp->lock, flags);
|
if (wait_cmd(dev, dma, 1000, "RX_START not processed"))
|
goto failed_free_irq;
|
DEB(DEB_INIT, printk(KERN_DEBUG
|
"%s: Receive unit started OK\n", dev->name));
|
return 0;
|
|
failed_free_irq:
|
free_irq(dev->irq, dev);
|
failed:
|
printk(KERN_ERR "%s: Failed to initialise 82596\n", dev->name);
|
mpu_port(dev, PORT_RESET, 0);
|
return -1;
|
}
|
|
|
static inline int i596_rx(struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
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 */
|
|
dma_sync_cpu(dev, rfd, sizeof(struct i596_rfd));
|
while (rfd->stat & SWAP16(STAT_C)) { /* Loop while complete frames */
|
if (rfd->rbd == I596_NULL)
|
rbd = NULL;
|
else if (rfd->rbd == lp->rbd_head->b_addr) {
|
rbd = lp->rbd_head;
|
dma_sync_cpu(dev, rbd, sizeof(struct i596_rbd));
|
} else {
|
printk(KERN_ERR "%s: rbd chain broken!\n", dev->name);
|
/* XXX Now what? */
|
rbd = NULL;
|
}
|
DEB(DEB_RXFRAME, printk(KERN_DEBUG
|
" rfd %p, rfd.rbd %08x, rfd.stat %04x\n",
|
rfd, rfd->rbd, rfd->stat));
|
|
if (rbd != NULL && (rfd->stat & SWAP16(STAT_OK))) {
|
/* a good frame */
|
int pkt_len = SWAP16(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;
|
dma_addr_t dma_addr;
|
|
dma_unmap_single(dev->dev.parent,
|
(dma_addr_t)SWAP32(rbd->b_data),
|
PKT_BUF_SZ, DMA_FROM_DEVICE);
|
/* Get fresh skbuff to replace filled one. */
|
newskb = netdev_alloc_skb_ip_align(dev,
|
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;
|
dma_addr = dma_map_single(dev->dev.parent,
|
newskb->data,
|
PKT_BUF_SZ,
|
DMA_FROM_DEVICE);
|
rbd->v_data = newskb->data;
|
rbd->b_data = SWAP32(dma_addr);
|
dma_sync_dev(dev, rbd, sizeof(struct i596_rbd));
|
} else {
|
skb = netdev_alloc_skb_ip_align(dev, pkt_len);
|
}
|
memory_squeeze:
|
if (skb == NULL) {
|
/* XXX tulip.c can defer packets here!! */
|
dev->stats.rx_dropped++;
|
} else {
|
if (!rx_in_place) {
|
/* 16 byte align the data fields */
|
dma_sync_single_for_cpu(dev->dev.parent,
|
(dma_addr_t)SWAP32(rbd->b_data),
|
PKT_BUF_SZ, DMA_FROM_DEVICE);
|
skb_put_data(skb, rbd->v_data,
|
pkt_len);
|
dma_sync_single_for_device(dev->dev.parent,
|
(dma_addr_t)SWAP32(rbd->b_data),
|
PKT_BUF_SZ, DMA_FROM_DEVICE);
|
}
|
skb->len = pkt_len;
|
skb->protocol = eth_type_trans(skb, dev);
|
netif_rx(skb);
|
dev->stats.rx_packets++;
|
dev->stats.rx_bytes += pkt_len;
|
}
|
} else {
|
DEB(DEB_ERRORS, printk(KERN_DEBUG
|
"%s: Error, rfd.stat = 0x%04x\n",
|
dev->name, rfd->stat));
|
dev->stats.rx_errors++;
|
if (rfd->stat & SWAP16(0x0100))
|
dev->stats.collisions++;
|
if (rfd->stat & SWAP16(0x8000))
|
dev->stats.rx_length_errors++;
|
if (rfd->stat & SWAP16(0x0001))
|
dev->stats.rx_over_errors++;
|
if (rfd->stat & SWAP16(0x0002))
|
dev->stats.rx_fifo_errors++;
|
if (rfd->stat & SWAP16(0x0004))
|
dev->stats.rx_frame_errors++;
|
if (rfd->stat & SWAP16(0x0008))
|
dev->stats.rx_crc_errors++;
|
if (rfd->stat & SWAP16(0x0010))
|
dev->stats.rx_length_errors++;
|
}
|
|
/* Clear the buffer descriptor count and EOF + F flags */
|
|
if (rbd != NULL && (rbd->count & SWAP16(0x4000))) {
|
rbd->count = 0;
|
lp->rbd_head = rbd->v_next;
|
dma_sync_dev(dev, rbd, sizeof(struct i596_rbd));
|
}
|
|
/* Tidy the frame descriptor, marking it as end of list */
|
|
rfd->rbd = I596_NULL;
|
rfd->stat = 0;
|
rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX);
|
rfd->count = 0;
|
|
/* Update record of next frame descriptor to process */
|
|
lp->dma->scb.rfd = rfd->b_next;
|
lp->rfd_head = rfd->v_next;
|
dma_sync_dev(dev, rfd, sizeof(struct i596_rfd));
|
|
/* Remove end-of-list from old end descriptor */
|
|
rfd->v_prev->cmd = SWAP16(CMD_FLEX);
|
dma_sync_dev(dev, rfd->v_prev, sizeof(struct i596_rfd));
|
rfd = lp->rfd_head;
|
dma_sync_cpu(dev, rfd, sizeof(struct i596_rfd));
|
}
|
|
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 != NULL) {
|
ptr = lp->cmd_head;
|
lp->cmd_head = ptr->v_next;
|
lp->cmd_backlog--;
|
|
switch (SWAP16(ptr->command) & 0x7) {
|
case CmdTx:
|
{
|
struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
|
struct sk_buff *skb = tx_cmd->skb;
|
dma_unmap_single(dev->dev.parent,
|
tx_cmd->dma_addr,
|
skb->len, DMA_TO_DEVICE);
|
|
dev_kfree_skb(skb);
|
|
dev->stats.tx_errors++;
|
dev->stats.tx_aborted_errors++;
|
|
ptr->v_next = NULL;
|
ptr->b_next = I596_NULL;
|
tx_cmd->cmd.command = 0; /* Mark as free */
|
break;
|
}
|
default:
|
ptr->v_next = NULL;
|
ptr->b_next = I596_NULL;
|
}
|
dma_sync_dev(dev, ptr, sizeof(struct i596_cmd));
|
}
|
|
wait_cmd(dev, lp->dma, 100, "i596_cleanup_cmd timed out");
|
lp->dma->scb.cmd = I596_NULL;
|
dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb));
|
}
|
|
|
static inline void i596_reset(struct net_device *dev, struct i596_private *lp)
|
{
|
unsigned long flags;
|
|
DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n"));
|
|
spin_lock_irqsave (&lp->lock, flags);
|
|
wait_cmd(dev, lp->dma, 100, "i596_reset timed out");
|
|
netif_stop_queue(dev);
|
|
/* FIXME: this command might cause an lpmc */
|
lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT);
|
dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb));
|
ca(dev);
|
|
/* wait for shutdown */
|
wait_cmd(dev, lp->dma, 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 = netdev_priv(dev);
|
struct i596_dma *dma = lp->dma;
|
unsigned long flags;
|
|
DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n",
|
lp->cmd_head));
|
|
cmd->status = 0;
|
cmd->command |= SWAP16(CMD_EOL | CMD_INTR);
|
cmd->v_next = NULL;
|
cmd->b_next = I596_NULL;
|
dma_sync_dev(dev, cmd, sizeof(struct i596_cmd));
|
|
spin_lock_irqsave (&lp->lock, flags);
|
|
if (lp->cmd_head != NULL) {
|
lp->cmd_tail->v_next = cmd;
|
lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status));
|
dma_sync_dev(dev, lp->cmd_tail, sizeof(struct i596_cmd));
|
} else {
|
lp->cmd_head = cmd;
|
wait_cmd(dev, dma, 100, "i596_add_cmd timed out");
|
dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status));
|
dma->scb.command = SWAP16(CUC_START);
|
dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb));
|
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_ERR
|
"%s: command unit timed out, status resetting.\n",
|
dev->name);
|
#if 1
|
i596_reset(dev, lp);
|
#endif
|
}
|
}
|
|
static int i596_open(struct net_device *dev)
|
{
|
DEB(DEB_OPEN, printk(KERN_DEBUG
|
"%s: i596_open() irq %d.\n", dev->name, dev->irq));
|
|
if (init_rx_bufs(dev)) {
|
printk(KERN_ERR "%s: Failed to init rx bufs\n", dev->name);
|
return -EAGAIN;
|
}
|
if (init_i596_mem(dev)) {
|
printk(KERN_ERR "%s: Failed to init memory\n", dev->name);
|
goto out_remove_rx_bufs;
|
}
|
netif_start_queue(dev);
|
|
return 0;
|
|
out_remove_rx_bufs:
|
remove_rx_bufs(dev);
|
return -EAGAIN;
|
}
|
|
static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
|
/* Transmitter timeout, serious problems. */
|
DEB(DEB_ERRORS, printk(KERN_DEBUG
|
"%s: transmit timed out, status resetting.\n",
|
dev->name));
|
|
dev->stats.tx_errors++;
|
|
/* Try to restart the adaptor */
|
if (lp->last_restart == dev->stats.tx_packets) {
|
DEB(DEB_ERRORS, printk(KERN_DEBUG "Resetting board.\n"));
|
/* Shutdown and restart */
|
i596_reset (dev, lp);
|
} else {
|
/* Issue a channel attention signal */
|
DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n"));
|
lp->dma->scb.command = SWAP16(CUC_START | RX_START);
|
dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb));
|
ca (dev);
|
lp->last_restart = dev->stats.tx_packets;
|
}
|
|
netif_trans_update(dev); /* prevent tx timeout */
|
netif_wake_queue (dev);
|
}
|
|
|
static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
struct tx_cmd *tx_cmd;
|
struct i596_tbd *tbd;
|
short length = skb->len;
|
|
DEB(DEB_STARTTX, printk(KERN_DEBUG
|
"%s: i596_start_xmit(%x,%p) called\n",
|
dev->name, skb->len, skb->data));
|
|
if (length < ETH_ZLEN) {
|
if (skb_padto(skb, ETH_ZLEN))
|
return NETDEV_TX_OK;
|
length = ETH_ZLEN;
|
}
|
|
netif_stop_queue(dev);
|
|
tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd;
|
tbd = lp->dma->tbds + lp->next_tx_cmd;
|
|
if (tx_cmd->cmd.command) {
|
DEB(DEB_ERRORS, printk(KERN_DEBUG
|
"%s: xmit ring full, dropping packet.\n",
|
dev->name));
|
dev->stats.tx_dropped++;
|
|
dev_kfree_skb_any(skb);
|
} else {
|
if (++lp->next_tx_cmd == TX_RING_SIZE)
|
lp->next_tx_cmd = 0;
|
tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd));
|
tbd->next = I596_NULL;
|
|
tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx);
|
tx_cmd->skb = skb;
|
|
tx_cmd->pad = 0;
|
tx_cmd->size = 0;
|
tbd->pad = 0;
|
tbd->size = SWAP16(EOF | length);
|
|
tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data,
|
skb->len, DMA_TO_DEVICE);
|
tbd->data = SWAP32(tx_cmd->dma_addr);
|
|
DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued"));
|
dma_sync_dev(dev, tx_cmd, sizeof(struct tx_cmd));
|
dma_sync_dev(dev, tbd, sizeof(struct i596_tbd));
|
i596_add_cmd(dev, &tx_cmd->cmd);
|
|
dev->stats.tx_packets++;
|
dev->stats.tx_bytes += length;
|
}
|
|
netif_start_queue(dev);
|
|
return NETDEV_TX_OK;
|
}
|
|
static void print_eth(unsigned char *add, char *str)
|
{
|
printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
|
add, add + 6, add, add[12], add[13], str);
|
}
|
static const struct net_device_ops i596_netdev_ops = {
|
.ndo_open = i596_open,
|
.ndo_stop = i596_close,
|
.ndo_start_xmit = i596_start_xmit,
|
.ndo_set_rx_mode = set_multicast_list,
|
.ndo_tx_timeout = i596_tx_timeout,
|
.ndo_validate_addr = eth_validate_addr,
|
.ndo_set_mac_address = eth_mac_addr,
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
.ndo_poll_controller = i596_poll_controller,
|
#endif
|
};
|
|
static int i82596_probe(struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
int ret;
|
|
/* This lot is ensure things have been cache line aligned. */
|
BUILD_BUG_ON(sizeof(struct i596_rfd) != 32);
|
BUILD_BUG_ON(sizeof(struct i596_rbd) & 31);
|
BUILD_BUG_ON(sizeof(struct tx_cmd) & 31);
|
BUILD_BUG_ON(sizeof(struct i596_tbd) != 32);
|
#ifndef __LP64__
|
BUILD_BUG_ON(sizeof(struct i596_dma) > 4096);
|
#endif
|
|
if (!dev->base_addr || !dev->irq)
|
return -ENODEV;
|
|
dev->netdev_ops = &i596_netdev_ops;
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
memset(lp->dma, 0, sizeof(struct i596_dma));
|
lp->dma->scb.command = 0;
|
lp->dma->scb.cmd = I596_NULL;
|
lp->dma->scb.rfd = I596_NULL;
|
spin_lock_init(&lp->lock);
|
|
dma_sync_dev(dev, lp->dma, sizeof(struct i596_dma));
|
|
ret = register_netdev(dev);
|
if (ret)
|
return ret;
|
|
DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx, %pM IRQ %d.\n",
|
dev->name, dev->base_addr, dev->dev_addr,
|
dev->irq));
|
DEB(DEB_INIT, printk(KERN_INFO
|
"%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n",
|
dev->name, lp->dma, (int)sizeof(struct i596_dma),
|
&lp->dma->scb));
|
|
return 0;
|
}
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
static void i596_poll_controller(struct net_device *dev)
|
{
|
disable_irq(dev->irq);
|
i596_interrupt(dev->irq, dev);
|
enable_irq(dev->irq);
|
}
|
#endif
|
|
static irqreturn_t i596_interrupt(int irq, void *dev_id)
|
{
|
struct net_device *dev = dev_id;
|
struct i596_private *lp;
|
struct i596_dma *dma;
|
unsigned short status, ack_cmd = 0;
|
|
lp = netdev_priv(dev);
|
dma = lp->dma;
|
|
spin_lock (&lp->lock);
|
|
wait_cmd(dev, dma, 100, "i596 interrupt, timeout");
|
status = SWAP16(dma->scb.status);
|
|
DEB(DEB_INTS, printk(KERN_DEBUG
|
"%s: i596 interrupt, IRQ %d, status %4.4x.\n",
|
dev->name, dev->irq, status));
|
|
ack_cmd = status & 0xf000;
|
|
if (!ack_cmd) {
|
DEB(DEB_ERRORS, printk(KERN_DEBUG
|
"%s: interrupt with no events\n",
|
dev->name));
|
spin_unlock (&lp->lock);
|
return IRQ_NONE;
|
}
|
|
if ((status & 0x8000) || (status & 0x2000)) {
|
struct i596_cmd *ptr;
|
|
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 != NULL) {
|
dma_sync_cpu(dev, lp->cmd_head, sizeof(struct i596_cmd));
|
if (!(lp->cmd_head->status & SWAP16(STAT_C)))
|
break;
|
|
ptr = lp->cmd_head;
|
|
DEB(DEB_STATUS,
|
printk(KERN_DEBUG
|
"cmd_head->status = %04x, ->command = %04x\n",
|
SWAP16(lp->cmd_head->status),
|
SWAP16(lp->cmd_head->command)));
|
lp->cmd_head = ptr->v_next;
|
lp->cmd_backlog--;
|
|
switch (SWAP16(ptr->command) & 0x7) {
|
case CmdTx:
|
{
|
struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
|
struct sk_buff *skb = tx_cmd->skb;
|
|
if (ptr->status & SWAP16(STAT_OK)) {
|
DEB(DEB_TXADDR,
|
print_eth(skb->data, "tx-done"));
|
} else {
|
dev->stats.tx_errors++;
|
if (ptr->status & SWAP16(0x0020))
|
dev->stats.collisions++;
|
if (!(ptr->status & SWAP16(0x0040)))
|
dev->stats.tx_heartbeat_errors++;
|
if (ptr->status & SWAP16(0x0400))
|
dev->stats.tx_carrier_errors++;
|
if (ptr->status & SWAP16(0x0800))
|
dev->stats.collisions++;
|
if (ptr->status & SWAP16(0x1000))
|
dev->stats.tx_aborted_errors++;
|
}
|
dma_unmap_single(dev->dev.parent,
|
tx_cmd->dma_addr,
|
skb->len, DMA_TO_DEVICE);
|
dev_consume_skb_irq(skb);
|
|
tx_cmd->cmd.command = 0; /* Mark free */
|
break;
|
}
|
case CmdTDR:
|
{
|
unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status);
|
|
if (status & 0x8000) {
|
DEB(DEB_ANY,
|
printk(KERN_DEBUG "%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_DEBUG "%s: Time %d.\n",
|
dev->name, status & 0x07ff));
|
}
|
break;
|
}
|
case CmdConfigure:
|
/*
|
* Zap command so set_multicast_list() know
|
* it is free
|
*/
|
ptr->command = 0;
|
break;
|
}
|
ptr->v_next = NULL;
|
ptr->b_next = I596_NULL;
|
dma_sync_dev(dev, ptr, sizeof(struct i596_cmd));
|
lp->last_cmd = jiffies;
|
}
|
|
/* This mess is arranging that only the last of any outstanding
|
* commands has the interrupt bit set. Should probably really
|
* only add to the cmd queue when the CU is stopped.
|
*/
|
ptr = lp->cmd_head;
|
while ((ptr != NULL) && (ptr != lp->cmd_tail)) {
|
struct i596_cmd *prev = ptr;
|
|
ptr->command &= SWAP16(0x1fff);
|
ptr = ptr->v_next;
|
dma_sync_dev(dev, prev, sizeof(struct i596_cmd));
|
}
|
|
if (lp->cmd_head != NULL)
|
ack_cmd |= CUC_START;
|
dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status));
|
dma_sync_dev(dev, &dma->scb, sizeof(struct i596_scb));
|
}
|
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_DEBUG
|
"%s: i596 interrupt receive unit inactive, status 0x%x\n",
|
dev->name, status));
|
ack_cmd |= RX_START;
|
dev->stats.rx_errors++;
|
dev->stats.rx_fifo_errors++;
|
rebuild_rx_bufs(dev);
|
}
|
}
|
}
|
wait_cmd(dev, dma, 100, "i596 interrupt, timeout");
|
dma->scb.command = SWAP16(ack_cmd);
|
dma_sync_dev(dev, &dma->scb, sizeof(struct i596_scb));
|
|
/* DANGER: I suspect that some kind of interrupt
|
acknowledgement aside from acking the 82596 might be needed
|
here... but it's running acceptably without */
|
|
ca(dev);
|
|
wait_cmd(dev, dma, 100, "i596 interrupt, exit timeout");
|
DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
|
|
spin_unlock (&lp->lock);
|
return IRQ_HANDLED;
|
}
|
|
static int i596_close(struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
unsigned long flags;
|
|
netif_stop_queue(dev);
|
|
DEB(DEB_INIT,
|
printk(KERN_DEBUG
|
"%s: Shutting down ethercard, status was %4.4x.\n",
|
dev->name, SWAP16(lp->dma->scb.status)));
|
|
spin_lock_irqsave(&lp->lock, flags);
|
|
wait_cmd(dev, lp->dma, 100, "close1 timed out");
|
lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT);
|
dma_sync_dev(dev, &lp->dma->scb, sizeof(struct i596_scb));
|
|
ca(dev);
|
|
wait_cmd(dev, lp->dma, 100, "close2 timed out");
|
spin_unlock_irqrestore(&lp->lock, flags);
|
DEB(DEB_STRUCT, i596_display_data(dev));
|
i596_cleanup_cmd(dev, lp);
|
|
free_irq(dev->irq, dev);
|
remove_rx_bufs(dev);
|
|
return 0;
|
}
|
|
/*
|
* Set or clear the multicast filter for this adaptor.
|
*/
|
|
static void set_multicast_list(struct net_device *dev)
|
{
|
struct i596_private *lp = netdev_priv(dev);
|
struct i596_dma *dma = lp->dma;
|
int config = 0, cnt;
|
|
DEB(DEB_MULTI,
|
printk(KERN_DEBUG
|
"%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
|
dev->name, netdev_mc_count(dev),
|
dev->flags & IFF_PROMISC ? "ON" : "OFF",
|
dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
|
|
if ((dev->flags & IFF_PROMISC) &&
|
!(dma->cf_cmd.i596_config[8] & 0x01)) {
|
dma->cf_cmd.i596_config[8] |= 0x01;
|
config = 1;
|
}
|
if (!(dev->flags & IFF_PROMISC) &&
|
(dma->cf_cmd.i596_config[8] & 0x01)) {
|
dma->cf_cmd.i596_config[8] &= ~0x01;
|
config = 1;
|
}
|
if ((dev->flags & IFF_ALLMULTI) &&
|
(dma->cf_cmd.i596_config[11] & 0x20)) {
|
dma->cf_cmd.i596_config[11] &= ~0x20;
|
config = 1;
|
}
|
if (!(dev->flags & IFF_ALLMULTI) &&
|
!(dma->cf_cmd.i596_config[11] & 0x20)) {
|
dma->cf_cmd.i596_config[11] |= 0x20;
|
config = 1;
|
}
|
if (config) {
|
if (dma->cf_cmd.cmd.command)
|
printk(KERN_INFO
|
"%s: config change request already queued\n",
|
dev->name);
|
else {
|
dma->cf_cmd.cmd.command = SWAP16(CmdConfigure);
|
dma_sync_dev(dev, &dma->cf_cmd, sizeof(struct cf_cmd));
|
i596_add_cmd(dev, &dma->cf_cmd.cmd);
|
}
|
}
|
|
cnt = netdev_mc_count(dev);
|
if (cnt > MAX_MC_CNT) {
|
cnt = MAX_MC_CNT;
|
printk(KERN_NOTICE "%s: Only %d multicast addresses supported",
|
dev->name, cnt);
|
}
|
|
if (!netdev_mc_empty(dev)) {
|
struct netdev_hw_addr *ha;
|
unsigned char *cp;
|
struct mc_cmd *cmd;
|
|
cmd = &dma->mc_cmd;
|
cmd->cmd.command = SWAP16(CmdMulticastList);
|
cmd->mc_cnt = SWAP16(netdev_mc_count(dev) * 6);
|
cp = cmd->mc_addrs;
|
netdev_for_each_mc_addr(ha, dev) {
|
if (!cnt--)
|
break;
|
memcpy(cp, ha->addr, ETH_ALEN);
|
if (i596_debug > 1)
|
DEB(DEB_MULTI,
|
printk(KERN_DEBUG
|
"%s: Adding address %pM\n",
|
dev->name, cp));
|
cp += ETH_ALEN;
|
}
|
dma_sync_dev(dev, &dma->mc_cmd, sizeof(struct mc_cmd));
|
i596_add_cmd(dev, &cmd->cmd);
|
}
|
}
|
