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linux/drivers/net/ni52.c
Wang Chen c16d118537 [netdrvr] Drivers should not set IFF_* flag themselves 
Some hardware set promisc when they are requested to set IFF_ALLMULTI flag.
It's ok, but if drivers set IFF_PROMISC flag when they set promisc,
it will broken upper layer handle for promisc and allmulti.
In addition, drivers can use their own hardware programming to make it.
So do not allow drivers to set IFF_* flags.

This is a general driver fix, so I didn't split it to pieces and send
to specific driver maintainers.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-08-07 02:23:19 -04:00

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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!)
* compile with:
* gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni52.c
* 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/slab.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 int 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 = dev->priv;
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 = dev->priv;
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 = dev->priv;
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 = dev->priv;
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 = (struct priv *) dev->priv;
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 = dev->priv;
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 int __init ni52_probe1(struct net_device *dev, int ioaddr)
{
int i, size, retval;
struct priv *priv = dev->priv;
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->open = ni52_open;
dev->stop = ni52_close;
dev->get_stats = ni52_get_stats;
dev->tx_timeout = ni52_timeout;
dev->watchdog_timeo = HZ/20;
dev->hard_start_xmit = ni52_send_packet;
dev->set_multicast_list = set_multicast_list;
dev->if_port = 0;
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 = (struct priv *)dev->priv;
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 dev_mc_list *dmi = dev->mc_list;
int num_addrs = dev->mc_count;
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);
for (i = 0; i < num_addrs; i++, dmi = dmi->next)
memcpy_toio(mc_cmd->mc_list[i],
dmi->dmi_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 = (struct priv *) dev->priv;
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 = (struct priv *) dev->priv;
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 = (struct priv *)dev->priv;
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);
dev->last_rx = jiffies;
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 = (struct priv *) dev->priv;
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 = (struct priv *) dev->priv;
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 = (struct priv *) dev->priv;
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 = (struct priv *) dev->priv;
#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;
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;
}
/******************************************************
* send frame
*/
static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
{
int len, i;
#ifndef NO_NOPCOMMANDS
int next_nop;
#endif
struct priv *p = (struct priv *) dev->priv;
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 0;
}
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();
dev->trans_start = jiffies;
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);
dev->trans_start = jiffies;
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);
dev->trans_start = jiffies;
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 0;
}
/*******************************************
* Someone wanna have the statistics
*/
static struct net_device_stats *ni52_get_stats(struct net_device *dev)
{
struct priv *p = (struct priv *) dev->priv;
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 = dev_ni52->priv;
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");
/*
* END: linux/drivers/net/ni52.c
*/
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