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linux/drivers/net/ni52.c
Eric Dumazet 1ae5dc342a net: trans_start cleanups 
Now that core network takes care of trans_start updates, dont do it
in drivers themselves, if possible. Drivers can avoid one cache miss
(on dev->trans_start) in their start_xmit() handler.

Exceptions are NETIF_F_LLTX drivers

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-10 05:01:31 -07:00

1347 lines
37 KiB
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/*
* net-3-driver for the NI5210 card (i82586 Ethernet chip)
*
* This is an extension to the Linux operating system, and is covered by the
* same GNU General Public License that covers that work.
*
* Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
* Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
* [feel free to mail ....]
*
* when using as module: (no autoprobing!)
* run with e.g:
* insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
*
* CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
*
* If you find a bug, please report me:
* The kernel panic output and any kmsg from the ni52 driver
* the ni5210-driver-version and the linux-kernel version
* how many shared memory (memsize) on the netcard,
* bootprom: yes/no, base_addr, mem_start
* maybe the ni5210-card revision and the i82586 version
*
* autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
* mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
* 0xd8000,0xcc000,0xce000,0xda000,0xdc000
*
* sources:
* skeleton.c from Donald Becker
*
* I have also done a look in the following sources: (mail me if you need them)
* crynwr-packet-driver by Russ Nelson
* Garret A. Wollman's (fourth) i82586-driver for BSD
* (before getting an i82596 (yes 596 not 586) manual, the existing drivers
* helped me a lot to understand this tricky chip.)
*
* Known Problems:
* The internal sysbus seems to be slow. So we often lose packets because of
* overruns while receiving from a fast remote host.
* This can slow down TCP connections. Maybe the newer ni5210 cards are
* better. My experience is, that if a machine sends with more than about
* 500-600K/s the fifo/sysbus overflows.
*
* IMPORTANT NOTE:
* On fast networks, it's a (very) good idea to have 16K shared memory. With
* 8K, we can store only 4 receive frames, so it can (easily) happen that a
* remote machine 'overruns' our system.
*
* Known i82586/card problems (I'm sure, there are many more!):
* Running the NOP-mode, the i82586 sometimes seems to forget to report
* every xmit-interrupt until we restart the CU.
* Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
* in the RBD-Struct which indicates an end of the RBD queue.
* Instead, the RU fetches another (randomly selected and
* usually used) RBD and begins to fill it. (Maybe, this happens only if
* the last buffer from the previous RFD fits exact into the queue and
* the next RFD can't fetch an initial RBD. Anyone knows more? )
*
* results from ftp performance tests with Linux 1.2.5
* send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
* sending in NOP-mode: peak performance up to 530K/s (but better don't
* run this mode)
*/
/*
* 29.Sept.96: virt_to_bus changes for new memory scheme
* 19.Feb.96: more Mcast changes, module support (MH)
*
* 18.Nov.95: Mcast changes (AC).
*
* 23.April.95: fixed(?) receiving problems by configuring a RFD more
* than the number of RBD's. Can maybe cause other problems.
* 18.April.95: Added MODULE support (MH)
* 17.April.95: MC related changes in init586() and set_multicast_list().
* removed use of 'jiffies' in init586() (MH)
*
* 19.Sep.94: Added Multicast support (not tested yet) (MH)
*
* 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
* Now, every RFD has exact one RBD. (MH)
*
* 14.Sep.94: added promiscuous mode, a few cleanups (MH)
*
* 19.Aug.94: changed request_irq() parameter (MH)
*
* 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
*
* 19.July.94: lotsa cleanups .. (MH)
*
* 17.July.94: some patches ... verified to run with 1.1.29 (MH)
*
* 4.July.94: patches for Linux 1.1.24 (MH)
*
* 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
*
* 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
* too (MH)
*
* < 30.Sep.93: first versions
*/
static int debuglevel; /* debug-printk 0: off 1: a few 2: more */
static int automatic_resume; /* experimental .. better should be zero */
static int rfdadd; /* rfdadd=1 may be better for 8K MEM cards */
static int fifo = 0x8; /* don't change */
#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/init.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include "ni52.h"
#define DRV_NAME "ni52"
#define DEBUG /* debug on */
#define SYSBUSVAL 1 /* 8 Bit */
#define ni_attn586() { outb(0, dev->base_addr + NI52_ATTENTION); }
#define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
#define ni_disint() { outb(0, dev->base_addr + NI52_INTDIS); }
#define ni_enaint() { outb(0, dev->base_addr + NI52_INTENA); }
#define make32(ptr16) ((void __iomem *)(p->memtop + (short) (ptr16)))
#define make24(ptr32) ((char __iomem *)(ptr32)) - p->base
#define make16(ptr32) ((unsigned short) ((char __iomem *)(ptr32)\
- p->memtop))
/******************* how to calculate the buffers *****************************
* IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
* --------------- in a different (more stable?) mode. Only in this mode it's
* possible to configure the driver with 'NO_NOPCOMMANDS'
sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
sizeof(rfd) = 24; sizeof(rbd) = 12;
sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
sizeof(nop_cmd) = 8;
* if you don't know the driver, better do not change these values: */
#define RECV_BUFF_SIZE 1524 /* slightly oversized */
#define XMIT_BUFF_SIZE 1524 /* slightly oversized */
#define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */
#define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */
#define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
#define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
/**************************************************************************/
#define NI52_TOTAL_SIZE 16
#define NI52_ADDR0 0x02
#define NI52_ADDR1 0x07
#define NI52_ADDR2 0x01
static int ni52_probe1(struct net_device *dev, int ioaddr);
static irqreturn_t ni52_interrupt(int irq, void *dev_id);
static int ni52_open(struct net_device *dev);
static int ni52_close(struct net_device *dev);
static netdev_tx_t ni52_send_packet(struct sk_buff *, struct net_device *);
static struct net_device_stats *ni52_get_stats(struct net_device *dev);
static void set_multicast_list(struct net_device *dev);
static void ni52_timeout(struct net_device *dev);
/* helper-functions */
static int init586(struct net_device *dev);
static int check586(struct net_device *dev, unsigned size);
static void alloc586(struct net_device *dev);
static void startrecv586(struct net_device *dev);
static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
static void ni52_rcv_int(struct net_device *dev);
static void ni52_xmt_int(struct net_device *dev);
static void ni52_rnr_int(struct net_device *dev);
struct priv {
struct net_device_stats stats;
char __iomem *base;
char __iomem *mapped;
char __iomem *memtop;
spinlock_t spinlock;
int reset;
struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
struct scp_struct __iomem *scp;
struct iscp_struct __iomem *iscp;
struct scb_struct __iomem *scb;
struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
#if (NUM_XMIT_BUFFS == 1)
struct transmit_cmd_struct __iomem *xmit_cmds[2];
struct nop_cmd_struct __iomem *nop_cmds[2];
#else
struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
#endif
int nop_point, num_recv_buffs;
char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
int xmit_count, xmit_last;
};
/* wait for command with timeout: */
static void wait_for_scb_cmd(struct net_device *dev)
{
struct priv *p = netdev_priv(dev);
int i;
for (i = 0; i < 16384; i++) {
if (readb(&p->scb->cmd_cuc) == 0)
break;
udelay(4);
if (i == 16383) {
printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
if (!p->reset) {
p->reset = 1;
ni_reset586();
}
}
}
}
static void wait_for_scb_cmd_ruc(struct net_device *dev)
{
struct priv *p = netdev_priv(dev);
int i;
for (i = 0; i < 16384; i++) {
if (readb(&p->scb->cmd_ruc) == 0)
break;
udelay(4);
if (i == 16383) {
printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
dev->name, readb(&p->scb->cmd_ruc),
readb(&p->scb->rus));
if (!p->reset) {
p->reset = 1;
ni_reset586();
}
}
}
}
static void wait_for_stat_compl(void __iomem *p)
{
struct nop_cmd_struct __iomem *addr = p;
int i;
for (i = 0; i < 32767; i++) {
if (readw(&((addr)->cmd_status)) & STAT_COMPL)
break;
udelay(32);
}
}
/**********************************************
* close device
*/
static int ni52_close(struct net_device *dev)
{
free_irq(dev->irq, dev);
ni_reset586(); /* the hard way to stop the receiver */
netif_stop_queue(dev);
return 0;
}
/**********************************************
* open device
*/
static int ni52_open(struct net_device *dev)
{
int ret;
ni_disint();
alloc586(dev);
init586(dev);
startrecv586(dev);
ni_enaint();
ret = request_irq(dev->irq, ni52_interrupt, 0, dev->name, dev);
if (ret) {
ni_reset586();
return ret;
}
netif_start_queue(dev);
return 0; /* most done by init */
}
static int check_iscp(struct net_device *dev, void __iomem *addr)
{
struct iscp_struct __iomem *iscp = addr;
struct priv *p = netdev_priv(dev);
memset_io(iscp, 0, sizeof(struct iscp_struct));
writel(make24(iscp), &p->scp->iscp);
writeb(1, &iscp->busy);
ni_reset586();
ni_attn586();
mdelay(32); /* wait a while... */
/* i82586 clears 'busy' after successful init */
if (readb(&iscp->busy))
return 0;
return 1;
}
/**********************************************
* Check to see if there's an 82586 out there.
*/
static int check586(struct net_device *dev, unsigned size)
{
struct priv *p = netdev_priv(dev);
int i;
p->mapped = ioremap(dev->mem_start, size);
if (!p->mapped)
return 0;
p->base = p->mapped + size - 0x01000000;
p->memtop = p->mapped + size;
p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
p->scb = (struct scb_struct __iomem *) p->mapped;
p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
memset_io(p->scp, 0, sizeof(struct scp_struct));
for (i = 0; i < sizeof(struct scp_struct); i++)
/* memory was writeable? */
if (readb((char __iomem *)p->scp + i))
goto Enodev;
writeb(SYSBUSVAL, &p->scp->sysbus); /* 1 = 8Bit-Bus, 0 = 16 Bit */
if (readb(&p->scp->sysbus) != SYSBUSVAL)
goto Enodev;
if (!check_iscp(dev, p->mapped))
goto Enodev;
if (!check_iscp(dev, p->iscp))
goto Enodev;
return 1;
Enodev:
iounmap(p->mapped);
return 0;
}
/******************************************************************
* set iscp at the right place, called by ni52_probe1 and open586.
*/
static void alloc586(struct net_device *dev)
{
struct priv *p = netdev_priv(dev);
ni_reset586();
mdelay(32);
memset_io(p->iscp, 0, sizeof(struct iscp_struct));
memset_io(p->scp , 0, sizeof(struct scp_struct));
writel(make24(p->iscp), &p->scp->iscp);
writeb(SYSBUSVAL, &p->scp->sysbus);
writew(make16(p->scb), &p->iscp->scb_offset);
writeb(1, &p->iscp->busy);
ni_reset586();
ni_attn586();
mdelay(32);
if (readb(&p->iscp->busy))
printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
p->reset = 0;
memset_io(p->scb, 0, sizeof(struct scb_struct));
}
/* set: io,irq,memstart,memend or set it when calling insmod */
static int irq = 9;
static int io = 0x300;
static long memstart; /* e.g 0xd0000 */
static long memend; /* e.g 0xd4000 */
/**********************************************
* probe the ni5210-card
*/
struct net_device * __init ni52_probe(int unit)
{
struct net_device *dev = alloc_etherdev(sizeof(struct priv));
static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
struct priv *p;
int *port;
int err = 0;
if (!dev)
return ERR_PTR(-ENOMEM);
p = netdev_priv(dev);
if (unit >= 0) {
sprintf(dev->name, "eth%d", unit);
netdev_boot_setup_check(dev);
io = dev->base_addr;
irq = dev->irq;
memstart = dev->mem_start;
memend = dev->mem_end;
}
if (io > 0x1ff) { /* Check a single specified location. */
err = ni52_probe1(dev, io);
} else if (io > 0) { /* Don't probe at all. */
err = -ENXIO;
} else {
for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
;
if (*port)
goto got_it;
#ifdef FULL_IO_PROBE
for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
;
if (io < 0x400)
goto got_it;
#endif
err = -ENODEV;
}
if (err)
goto out;
got_it:
err = register_netdev(dev);
if (err)
goto out1;
return dev;
out1:
iounmap(p->mapped);
release_region(dev->base_addr, NI52_TOTAL_SIZE);
out:
free_netdev(dev);
return ERR_PTR(err);
}
static const struct net_device_ops ni52_netdev_ops = {
.ndo_open = ni52_open,
.ndo_stop = ni52_close,
.ndo_get_stats = ni52_get_stats,
.ndo_tx_timeout = ni52_timeout,
.ndo_start_xmit = ni52_send_packet,
.ndo_set_multicast_list = set_multicast_list,
.ndo_change_mtu = eth_change_mtu,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
};
static int __init ni52_probe1(struct net_device *dev, int ioaddr)
{
int i, size, retval;
struct priv *priv = netdev_priv(dev);
dev->base_addr = ioaddr;
dev->irq = irq;
dev->mem_start = memstart;
dev->mem_end = memend;
spin_lock_init(&priv->spinlock);
if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
return -EBUSY;
if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
!(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
retval = -ENODEV;
goto out;
}
for (i = 0; i < ETH_ALEN; i++)
dev->dev_addr[i] = inb(dev->base_addr+i);
if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1 ||
dev->dev_addr[2] != NI52_ADDR2) {
retval = -ENODEV;
goto out;
}
printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
dev->name, dev->base_addr);
/*
* check (or search) IO-Memory, 8K and 16K
*/
#ifdef MODULE
size = dev->mem_end - dev->mem_start;
if (size != 0x2000 && size != 0x4000) {
printk("\n");
printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
retval = -ENODEV;
goto out;
}
if (!check586(dev, size)) {
printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
retval = -ENODEV;
goto out;
}
#else
if (dev->mem_start != 0) {
/* no auto-mem-probe */
size = 0x4000; /* check for 16K mem */
if (!check586(dev, size)) {
size = 0x2000; /* check for 8K mem */
if (!check586(dev, size)) {
printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
retval = -ENODEV;
goto out;
}
}
} else {
static const unsigned long memaddrs[] = {
0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
};
for (i = 0;; i++) {
if (!memaddrs[i]) {
printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
retval = -ENODEV;
goto out;
}
dev->mem_start = memaddrs[i];
size = 0x2000; /* check for 8K mem */
if (check586(dev, size))
/* 8K-check */
break;
size = 0x4000; /* check for 16K mem */
if (check586(dev, size))
/* 16K-check */
break;
}
}
/* set mem_end showed by 'ifconfig' */
dev->mem_end = dev->mem_start + size;
#endif
alloc586(dev);
/* set number of receive-buffs according to memsize */
if (size == 0x2000)
priv->num_recv_buffs = NUM_RECV_BUFFS_8;
else
priv->num_recv_buffs = NUM_RECV_BUFFS_16;
printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
dev->mem_start, size);
if (dev->irq < 2) {
unsigned long irq_mask;
irq_mask = probe_irq_on();
ni_reset586();
ni_attn586();
mdelay(20);
dev->irq = probe_irq_off(irq_mask);
if (!dev->irq) {
printk("?autoirq, Failed to detect IRQ line!\n");
retval = -EAGAIN;
iounmap(priv->mapped);
goto out;
}
printk("IRQ %d (autodetected).\n", dev->irq);
} else {
if (dev->irq == 2)
dev->irq = 9;
printk("IRQ %d (assigned and not checked!).\n", dev->irq);
}
dev->netdev_ops = &ni52_netdev_ops;
dev->watchdog_timeo = HZ/20;
return 0;
out:
release_region(ioaddr, NI52_TOTAL_SIZE);
return retval;
}
/**********************************************
* init the chip (ni52-interrupt should be disabled?!)
* needs a correct 'allocated' memory
*/
static int init586(struct net_device *dev)
{
void __iomem *ptr;
int i, result = 0;
struct priv *p = netdev_priv(dev);
struct configure_cmd_struct __iomem *cfg_cmd;
struct iasetup_cmd_struct __iomem *ias_cmd;
struct tdr_cmd_struct __iomem *tdr_cmd;
struct mcsetup_cmd_struct __iomem *mc_cmd;
struct netdev_hw_addr *ha;
int num_addrs = netdev_mc_count(dev);
ptr = p->scb + 1;
cfg_cmd = ptr; /* configure-command */
writew(0, &cfg_cmd->cmd_status);
writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
writew(0xFFFF, &cfg_cmd->cmd_link);
/* number of cfg bytes */
writeb(0x0a, &cfg_cmd->byte_cnt);
/* fifo-limit (8=tx:32/rx:64) */
writeb(fifo, &cfg_cmd->fifo);
/* hold or discard bad recv frames (bit 7) */
writeb(0x40, &cfg_cmd->sav_bf);
/* addr_len |!src_insert |pre-len |loopback */
writeb(0x2e, &cfg_cmd->adr_len);
writeb(0x00, &cfg_cmd->priority);
writeb(0x60, &cfg_cmd->ifs);
writeb(0x00, &cfg_cmd->time_low);
writeb(0xf2, &cfg_cmd->time_high);
writeb(0x00, &cfg_cmd->promisc);
if (dev->flags & IFF_ALLMULTI) {
int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
if (num_addrs > len) {
printk(KERN_ERR "%s: switching to promisc. mode\n",
dev->name);
writeb(0x01, &cfg_cmd->promisc);
}
}
if (dev->flags & IFF_PROMISC)
writeb(0x01, &cfg_cmd->promisc);
writeb(0x00, &cfg_cmd->carr_coll);
writew(make16(cfg_cmd), &p->scb->cbl_offset);
writeb(0, &p->scb->cmd_ruc);
writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
ni_attn586();
wait_for_stat_compl(cfg_cmd);
if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
(STAT_COMPL|STAT_OK)) {
printk(KERN_ERR "%s: configure command failed: %x\n",
dev->name, readw(&cfg_cmd->cmd_status));
return 1;
}
/*
* individual address setup
*/
ias_cmd = ptr;
writew(0, &ias_cmd->cmd_status);
writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
writew(0xffff, &ias_cmd->cmd_link);
memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
writew(make16(ias_cmd), &p->scb->cbl_offset);
writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
ni_attn586();
wait_for_stat_compl(ias_cmd);
if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
(STAT_OK|STAT_COMPL)) {
printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
return 1;
}
/*
* TDR, wire check .. e.g. no resistor e.t.c
*/
tdr_cmd = ptr;
writew(0, &tdr_cmd->cmd_status);
writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
writew(0xffff, &tdr_cmd->cmd_link);
writew(0, &tdr_cmd->status);
writew(make16(tdr_cmd), &p->scb->cbl_offset);
writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
ni_attn586();
wait_for_stat_compl(tdr_cmd);
if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
printk(KERN_ERR "%s: Problems while running the TDR.\n",
dev->name);
else {
udelay(16);
result = readw(&tdr_cmd->status);
writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
ni_attn586(); /* ack the interrupts */
if (result & TDR_LNK_OK)
;
else if (result & TDR_XCVR_PRB)
printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
dev->name);
else if (result & TDR_ET_OPN)
printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
dev->name, result & TDR_TIMEMASK);
else if (result & TDR_ET_SRT) {
/* time == 0 -> strange :-) */
if (result & TDR_TIMEMASK)
printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
dev->name, result & TDR_TIMEMASK);
} else
printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
dev->name, result);
}
/*
* Multicast setup
*/
if (num_addrs && !(dev->flags & IFF_PROMISC)) {
mc_cmd = ptr;
writew(0, &mc_cmd->cmd_status);
writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
writew(0xffff, &mc_cmd->cmd_link);
writew(num_addrs * 6, &mc_cmd->mc_cnt);
i = 0;
netdev_for_each_mc_addr(ha, dev)
memcpy_toio(mc_cmd->mc_list[i++], ha->addr, 6);
writew(make16(mc_cmd), &p->scb->cbl_offset);
writeb(CUC_START, &p->scb->cmd_cuc);
ni_attn586();
wait_for_stat_compl(mc_cmd);
if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
!= (STAT_COMPL|STAT_OK))
printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
}
/*
* alloc nop/xmit-cmds
*/
#if (NUM_XMIT_BUFFS == 1)
for (i = 0; i < 2; i++) {
p->nop_cmds[i] = ptr;
writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
writew(0, &p->nop_cmds[i]->cmd_status);
writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
ptr = ptr + sizeof(struct nop_cmd_struct);
}
#else
for (i = 0; i < NUM_XMIT_BUFFS; i++) {
p->nop_cmds[i] = ptr;
writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
writew(0, &p->nop_cmds[i]->cmd_status);
writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
ptr = ptr + sizeof(struct nop_cmd_struct);
}
#endif
ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
/*
* alloc xmit-buffs / init xmit_cmds
*/
for (i = 0; i < NUM_XMIT_BUFFS; i++) {
/* Transmit cmd/buff 0 */
p->xmit_cmds[i] = ptr;
ptr = ptr + sizeof(struct transmit_cmd_struct);
p->xmit_cbuffs[i] = ptr; /* char-buffs */
ptr = ptr + XMIT_BUFF_SIZE;
p->xmit_buffs[i] = ptr; /* TBD */
ptr = ptr + sizeof(struct tbd_struct);
if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
dev->name);
return 1;
}
memset_io(p->xmit_cmds[i], 0,
sizeof(struct transmit_cmd_struct));
memset_io(p->xmit_buffs[i], 0,
sizeof(struct tbd_struct));
writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
&p->xmit_cmds[i]->cmd_link);
writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
writew(0xffff, &p->xmit_buffs[i]->next);
writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
}
p->xmit_count = 0;
p->xmit_last = 0;
#ifndef NO_NOPCOMMANDS
p->nop_point = 0;
#endif
/*
* 'start transmitter'
*/
#ifndef NO_NOPCOMMANDS
writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
writeb(CUC_START, &p->scb->cmd_cuc);
ni_attn586();
wait_for_scb_cmd(dev);
#else
writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
#endif
/*
* ack. interrupts
*/
writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
ni_attn586();
udelay(16);
ni_enaint();
return 0;
}
/******************************************************
* This is a helper routine for ni52_rnr_int() and init586().
* It sets up the Receive Frame Area (RFA).
*/
static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
{
struct rfd_struct __iomem *rfd = ptr;
struct rbd_struct __iomem *rbd;
int i;
struct priv *p = netdev_priv(dev);
memset_io(rfd, 0,
sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
p->rfd_first = rfd;
for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
&rfd[i].next);
writew(0xffff, &rfd[i].rbd_offset);
}
/* RU suspend */
writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
ptr = rfd + (p->num_recv_buffs + rfdadd);
rbd = ptr;
ptr = rbd + p->num_recv_buffs;
/* clr descriptors */
memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
for (i = 0; i < p->num_recv_buffs; i++) {
writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
writew(RECV_BUFF_SIZE, &rbd[i].size);
writel(make24(ptr), &rbd[i].buffer);
ptr = ptr + RECV_BUFF_SIZE;
}
p->rfd_top = p->rfd_first;
p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
writew(make16(p->rfd_first), &p->scb->rfa_offset);
writew(make16(rbd), &p->rfd_first->rbd_offset);
return ptr;
}
/**************************************************
* Interrupt Handler ...
*/
static irqreturn_t ni52_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
unsigned int stat;
int cnt = 0;
struct priv *p;
p = netdev_priv(dev);
if (debuglevel > 1)
printk("I");
spin_lock(&p->spinlock);
wait_for_scb_cmd(dev); /* wait for last command */
while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
writeb(stat, &p->scb->cmd_cuc);
ni_attn586();
if (stat & STAT_FR) /* received a frame */
ni52_rcv_int(dev);
if (stat & STAT_RNR) { /* RU went 'not ready' */
printk("(R)");
if (readb(&p->scb->rus) & RU_SUSPEND) {
/* special case: RU_SUSPEND */
wait_for_scb_cmd(dev);
writeb(RUC_RESUME, &p->scb->cmd_ruc);
ni_attn586();
wait_for_scb_cmd_ruc(dev);
} else {
printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
dev->name, stat, readb(&p->scb->rus));
ni52_rnr_int(dev);
}
}
/* Command with I-bit set complete */
if (stat & STAT_CX)
ni52_xmt_int(dev);
#ifndef NO_NOPCOMMANDS
if (stat & STAT_CNA) { /* CU went 'not ready' */
if (netif_running(dev))
printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
dev->name, stat, readb(&p->scb->cus));
}
#endif
if (debuglevel > 1)
printk("%d", cnt++);
/* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
wait_for_scb_cmd(dev);
if (readb(&p->scb->cmd_cuc)) { /* timed out? */
printk(KERN_ERR "%s: Acknowledge timed out.\n",
dev->name);
ni_disint();
break;
}
}
spin_unlock(&p->spinlock);
if (debuglevel > 1)
printk("i");
return IRQ_HANDLED;
}
/*******************************************************
* receive-interrupt
*/
static void ni52_rcv_int(struct net_device *dev)
{
int status, cnt = 0;
unsigned short totlen;
struct sk_buff *skb;
struct rbd_struct __iomem *rbd;
struct priv *p = netdev_priv(dev);
if (debuglevel > 0)
printk("R");
for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
rbd = make32(readw(&p->rfd_top->rbd_offset));
if (status & RFD_OK) { /* frame received without error? */
totlen = readw(&rbd->status);
if (totlen & RBD_LAST) {
/* the first and the last buffer? */
totlen &= RBD_MASK; /* length of this frame */
writew(0x00, &rbd->status);
skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
if (skb != NULL) {
skb_reserve(skb, 2);
skb_put(skb, totlen);
memcpy_fromio(skb->data, p->base + readl(&rbd->buffer), totlen);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
p->stats.rx_packets++;
p->stats.rx_bytes += totlen;
} else
p->stats.rx_dropped++;
} else {
int rstat;
/* free all RBD's until RBD_LAST is set */
totlen = 0;
while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
totlen += rstat & RBD_MASK;
if (!rstat) {
printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
break;
}
writew(0, &rbd->status);
rbd = make32(readw(&rbd->next));
}
totlen += rstat & RBD_MASK;
writew(0, &rbd->status);
printk(KERN_ERR "%s: received oversized frame! length: %d\n",
dev->name, totlen);
p->stats.rx_dropped++;
}
} else {/* frame !(ok), only with 'save-bad-frames' */
printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
dev->name, status);
p->stats.rx_errors++;
}
writeb(0, &p->rfd_top->stat_high);
writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
writew(0xffff, &p->rfd_top->rbd_offset);
writeb(0, &p->rfd_last->last); /* delete RFD_SUSP */
p->rfd_last = p->rfd_top;
p->rfd_top = make32(readw(&p->rfd_top->next)); /* step to next RFD */
writew(make16(p->rfd_top), &p->scb->rfa_offset);
if (debuglevel > 0)
printk("%d", cnt++);
}
if (automatic_resume) {
wait_for_scb_cmd(dev);
writeb(RUC_RESUME, &p->scb->cmd_ruc);
ni_attn586();
wait_for_scb_cmd_ruc(dev);
}
#ifdef WAIT_4_BUSY
{
int i;
for (i = 0; i < 1024; i++) {
if (p->rfd_top->status)
break;
udelay(16);
if (i == 1023)
printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
}
}
#endif
if (debuglevel > 0)
printk("r");
}
/**********************************************************
* handle 'Receiver went not ready'.
*/
static void ni52_rnr_int(struct net_device *dev)
{
struct priv *p = netdev_priv(dev);
p->stats.rx_errors++;
wait_for_scb_cmd(dev); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
ni_attn586();
wait_for_scb_cmd_ruc(dev); /* wait for accept cmd. */
alloc_rfa(dev, p->rfd_first);
/* maybe add a check here, before restarting the RU */
startrecv586(dev); /* restart RU */
printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n",
dev->name, readb(&p->scb->rus));
}
/**********************************************************
* handle xmit - interrupt
*/
static void ni52_xmt_int(struct net_device *dev)
{
int status;
struct priv *p = netdev_priv(dev);
if (debuglevel > 0)
printk("X");
status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
if (!(status & STAT_COMPL))
printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
if (status & STAT_OK) {
p->stats.tx_packets++;
p->stats.collisions += (status & TCMD_MAXCOLLMASK);
} else {
p->stats.tx_errors++;
if (status & TCMD_LATECOLL) {
printk(KERN_ERR "%s: late collision detected.\n",
dev->name);
p->stats.collisions++;
} else if (status & TCMD_NOCARRIER) {
p->stats.tx_carrier_errors++;
printk(KERN_ERR "%s: no carrier detected.\n",
dev->name);
} else if (status & TCMD_LOSTCTS)
printk(KERN_ERR "%s: loss of CTS detected.\n",
dev->name);
else if (status & TCMD_UNDERRUN) {
p->stats.tx_fifo_errors++;
printk(KERN_ERR "%s: DMA underrun detected.\n",
dev->name);
} else if (status & TCMD_MAXCOLL) {
printk(KERN_ERR "%s: Max. collisions exceeded.\n",
dev->name);
p->stats.collisions += 16;
}
}
#if (NUM_XMIT_BUFFS > 1)
if ((++p->xmit_last) == NUM_XMIT_BUFFS)
p->xmit_last = 0;
#endif
netif_wake_queue(dev);
}
/***********************************************************
* (re)start the receiver
*/
static void startrecv586(struct net_device *dev)
{
struct priv *p = netdev_priv(dev);
wait_for_scb_cmd(dev);
wait_for_scb_cmd_ruc(dev);
writew(make16(p->rfd_first), &p->scb->rfa_offset);
writeb(RUC_START, &p->scb->cmd_ruc);
ni_attn586(); /* start cmd. */
wait_for_scb_cmd_ruc(dev);
/* wait for accept cmd. (no timeout!!) */
}
static void ni52_timeout(struct net_device *dev)
{
struct priv *p = netdev_priv(dev);
#ifndef NO_NOPCOMMANDS
if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
netif_wake_queue(dev);
#ifdef DEBUG
printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
dev->name);
printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
dev->name, (int)p->xmit_cmds[0]->cmd_status,
readw(&p->nop_cmds[0]->cmd_status),
readw(&p->nop_cmds[1]->cmd_status),
p->nop_point);
#endif
writeb(CUC_ABORT, &p->scb->cmd_cuc);
ni_attn586();
wait_for_scb_cmd(dev);
writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
writeb(CUC_START, &p->scb->cmd_cuc);
ni_attn586();
wait_for_scb_cmd(dev);
dev->trans_start = jiffies; /* prevent tx timeout */
return 0;
}
#endif
{
#ifdef DEBUG
printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
dev->name, readb(&p->scb->cus));
printk(KERN_ERR "%s: command-stats: %04x %04x\n",
dev->name,
readw(&p->xmit_cmds[0]->cmd_status),
readw(&p->xmit_cmds[1]->cmd_status));
printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
dev->name);
#endif
ni52_close(dev);
ni52_open(dev);
}
dev->trans_start = jiffies; /* prevent tx timeout */
}
/******************************************************
* send frame
*/
static netdev_tx_t ni52_send_packet(struct sk_buff *skb,
struct net_device *dev)
{
int len, i;
#ifndef NO_NOPCOMMANDS
int next_nop;
#endif
struct priv *p = netdev_priv(dev);
if (skb->len > XMIT_BUFF_SIZE) {
printk(KERN_ERR "%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n", dev->name, XMIT_BUFF_SIZE, skb->len);
return NETDEV_TX_OK;
}
netif_stop_queue(dev);
memcpy_toio(p->xmit_cbuffs[p->xmit_count], skb->data, skb->len);
len = skb->len;
if (len < ETH_ZLEN) {
len = ETH_ZLEN;
memset_io(p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
len - skb->len);
}
#if (NUM_XMIT_BUFFS == 1)
# ifdef NO_NOPCOMMANDS
#ifdef DEBUG
if (readb(&p->scb->cus) & CU_ACTIVE) {
printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
printk(KERN_ERR "%s: stat: %04x %04x\n",
dev->name, readb(&p->scb->cus),
readw(&p->xmit_cmds[0]->cmd_status));
}
#endif
writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
for (i = 0; i < 16; i++) {
writew(0, &p->xmit_cmds[0]->cmd_status);
wait_for_scb_cmd(dev);
if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
writeb(CUC_RESUME, &p->scb->cmd_cuc);
else {
writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
writeb(CUC_START, &p->scb->cmd_cuc);
}
ni_attn586();
if (!i)
dev_kfree_skb(skb);
wait_for_scb_cmd(dev);
/* test it, because CU sometimes doesn't start immediately */
if (readb(&p->scb->cus) & CU_ACTIVE)
break;
if (readw(&p->xmit_cmds[0]->cmd_status))
break;
if (i == 15)
printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
}
# else
next_nop = (p->nop_point + 1) & 0x1;
writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
writew(make16(p->nop_cmds[next_nop]),
&p->nop_cmds[next_nop]->cmd_link);
writew(0, &p->xmit_cmds[0]->cmd_status);
writew(0, &p->nop_cmds[next_nop]->cmd_status);
writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
p->nop_point = next_nop;
dev_kfree_skb(skb);
# endif
#else
writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
next_nop = p->xmit_count + 1
if (next_nop == NUM_XMIT_BUFFS)
next_nop = 0;
writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
/* linkpointer of xmit-command already points to next nop cmd */
writew(make16(p->nop_cmds[next_nop]),
&p->nop_cmds[next_nop]->cmd_link);
writew(0, &p->nop_cmds[next_nop]->cmd_status);
writew(make16(p->xmit_cmds[p->xmit_count]),
&p->nop_cmds[p->xmit_count]->cmd_link);
p->xmit_count = next_nop;
{
unsigned long flags;
spin_lock_irqsave(&p->spinlock);
if (p->xmit_count != p->xmit_last)
netif_wake_queue(dev);
spin_unlock_irqrestore(&p->spinlock);
}
dev_kfree_skb(skb);
#endif
return NETDEV_TX_OK;
}
/*******************************************
* Someone wanna have the statistics
*/
static struct net_device_stats *ni52_get_stats(struct net_device *dev)
{
struct priv *p = netdev_priv(dev);
unsigned short crc, aln, rsc, ovrn;
/* Get error-statistics from the ni82586 */
crc = readw(&p->scb->crc_errs);
writew(0, &p->scb->crc_errs);
aln = readw(&p->scb->aln_errs);
writew(0, &p->scb->aln_errs);
rsc = readw(&p->scb->rsc_errs);
writew(0, &p->scb->rsc_errs);
ovrn = readw(&p->scb->ovrn_errs);
writew(0, &p->scb->ovrn_errs);
p->stats.rx_crc_errors += crc;
p->stats.rx_fifo_errors += ovrn;
p->stats.rx_frame_errors += aln;
p->stats.rx_dropped += rsc;
return &p->stats;
}
/********************************************************
* Set MC list ..
*/
static void set_multicast_list(struct net_device *dev)
{
netif_stop_queue(dev);
ni_disint();
alloc586(dev);
init586(dev);
startrecv586(dev);
ni_enaint();
netif_wake_queue(dev);
}
#ifdef MODULE
static struct net_device *dev_ni52;
module_param(io, int, 0);
module_param(irq, int, 0);
module_param(memstart, long, 0);
module_param(memend, long, 0);
MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
int __init init_module(void)
{
if (io <= 0x0 || !memend || !memstart || irq < 2) {
printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
return -ENODEV;
}
dev_ni52 = ni52_probe(-1);
if (IS_ERR(dev_ni52))
return PTR_ERR(dev_ni52);
return 0;
}
void __exit cleanup_module(void)
{
struct priv *p = netdev_priv(dev_ni52);
unregister_netdev(dev_ni52);
iounmap(p->mapped);
release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
free_netdev(dev_ni52);
}
#endif /* MODULE */
MODULE_LICENSE("GPL");
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