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linux_dsm_epyc7002/drivers/net/ethernet/amd/ni65.c
Rusty Russell 8c6ffba0ed PTR_RET is now PTR_ERR_OR_ZERO(): Replace most. 
Sweep of the simple cases.

Cc: netdev@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-07-15 11:25:01 +09:30

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/*
* ni6510 (am7990 'lance' chip) driver for Linux-net-3
* BETAcode v0.71 (96/09/29) for 2.0.0 (or later)
* copyrights (c) 1994,1995,1996 by M.Hipp
*
* This driver can handle the old ni6510 board and the newer ni6510
* EtherBlaster. (probably it also works with every full NE2100
* compatible card)
*
* driver probes: io: 0x360,0x300,0x320,0x340 / dma: 3,5,6,7
*
* This is an extension to the Linux operating system, and is covered by the
* same GNU General Public License that covers the Linux-kernel.
*
* comments/bugs/suggestions can be sent to:
* Michael Hipp
* email: hippm@informatik.uni-tuebingen.de
*
* sources:
* some things are from the 'ni6510-packet-driver for dos by Russ Nelson'
* and from the original drivers by D.Becker
*
* known problems:
* - on some PCI boards (including my own) the card/board/ISA-bridge has
* problems with bus master DMA. This results in lotsa overruns.
* It may help to '#define RCV_PARANOIA_CHECK' or try to #undef
* the XMT and RCV_VIA_SKB option .. this reduces driver performance.
* Or just play with your BIOS options to optimize ISA-DMA access.
* Maybe you also wanna play with the LOW_PERFORAMCE and MID_PERFORMANCE
* defines -> please report me your experience then
* - Harald reported for ASUS SP3G mainboards, that you should use
* the 'optimal settings' from the user's manual on page 3-12!
*
* credits:
* thanx to Jason Sullivan for sending me a ni6510 card!
* lot of debug runs with ASUS SP3G Boards (Intel Saturn) by Harald Koenig
*
* simple performance test: (486DX-33/Ni6510-EB receives from 486DX4-100/Ni6510-EB)
* average: FTP -> 8384421 bytes received in 8.5 seconds
* (no RCV_VIA_SKB,no XMT_VIA_SKB,PARANOIA_CHECK,4 XMIT BUFS, 8 RCV_BUFFS)
* peak: FTP -> 8384421 bytes received in 7.5 seconds
* (RCV_VIA_SKB,XMT_VIA_SKB,no PARANOIA_CHECK,1(!) XMIT BUF, 16 RCV BUFFS)
*/
/*
* 99.Jun.8: added support for /proc/net/dev byte count for xosview (HK)
* 96.Sept.29: virt_to_bus stuff added for new memory modell
* 96.April.29: Added Harald Koenig's Patches (MH)
* 96.April.13: enhanced error handling .. more tests (MH)
* 96.April.5/6: a lot of performance tests. Got it stable now (hopefully) (MH)
* 96.April.1: (no joke ;) .. added EtherBlaster and Module support (MH)
* 96.Feb.19: fixed a few bugs .. cleanups .. tested for 1.3.66 (MH)
* hopefully no more 16MB limit
*
* 95.Nov.18: multicast tweaked (AC).
*
* 94.Aug.22: changes in xmit_intr (ack more than one xmitted-packet), ni65_send_packet (p->lock) (MH)
*
* 94.July.16: fixed bugs in recv_skb and skb-alloc stuff (MH)
*/
#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/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/module.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <asm/dma.h>
#include "ni65.h"
/*
* the current setting allows an acceptable performance
* for 'RCV_PARANOIA_CHECK' read the 'known problems' part in
* the header of this file
* 'invert' the defines for max. performance. This may cause DMA problems
* on some boards (e.g on my ASUS SP3G)
*/
#undef XMT_VIA_SKB
#undef RCV_VIA_SKB
#define RCV_PARANOIA_CHECK
#define MID_PERFORMANCE
#if defined( LOW_PERFORMANCE )
static int isa0=7,isa1=7,csr80=0x0c10;
#elif defined( MID_PERFORMANCE )
static int isa0=5,isa1=5,csr80=0x2810;
#else /* high performance */
static int isa0=4,isa1=4,csr80=0x0017;
#endif
/*
* a few card/vendor specific defines
*/
#define NI65_ID0 0x00
#define NI65_ID1 0x55
#define NI65_EB_ID0 0x52
#define NI65_EB_ID1 0x44
#define NE2100_ID0 0x57
#define NE2100_ID1 0x57
#define PORT p->cmdr_addr
/*
* buffer configuration
*/
#if 1
#define RMDNUM 16
#define RMDNUMMASK 0x80000000
#else
#define RMDNUM 8
#define RMDNUMMASK 0x60000000 /* log2(RMDNUM)<<29 */
#endif
#if 0
#define TMDNUM 1
#define TMDNUMMASK 0x00000000
#else
#define TMDNUM 4
#define TMDNUMMASK 0x40000000 /* log2(TMDNUM)<<29 */
#endif
/* slightly oversized */
#define R_BUF_SIZE 1544
#define T_BUF_SIZE 1544
/*
* lance register defines
*/
#define L_DATAREG 0x00
#define L_ADDRREG 0x02
#define L_RESET 0x04
#define L_CONFIG 0x05
#define L_BUSIF 0x06
/*
* to access the lance/am7990-regs, you have to write
* reg-number into L_ADDRREG, then you can access it using L_DATAREG
*/
#define CSR0 0x00
#define CSR1 0x01
#define CSR2 0x02
#define CSR3 0x03
#define INIT_RING_BEFORE_START 0x1
#define FULL_RESET_ON_ERROR 0x2
#if 0
#define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);inw(PORT+L_ADDRREG); \
outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
#define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_ADDRREG),\
inw(PORT+L_DATAREG))
#if 0
#define writedatareg(val) {outw(val,PORT+L_DATAREG);inw(PORT+L_DATAREG);}
#else
#define writedatareg(val) { writereg(val,CSR0); }
#endif
#else
#define writereg(val,reg) {outw(reg,PORT+L_ADDRREG);outw(val,PORT+L_DATAREG);}
#define readreg(reg) (outw(reg,PORT+L_ADDRREG),inw(PORT+L_DATAREG))
#define writedatareg(val) { writereg(val,CSR0); }
#endif
static unsigned char ni_vendor[] = { 0x02,0x07,0x01 };
static struct card {
unsigned char id0,id1;
short id_offset;
short total_size;
short cmd_offset;
short addr_offset;
unsigned char *vendor_id;
char *cardname;
unsigned long config;
} cards[] = {
{
.id0 = NI65_ID0,
.id1 = NI65_ID1,
.id_offset = 0x0e,
.total_size = 0x10,
.cmd_offset = 0x0,
.addr_offset = 0x8,
.vendor_id = ni_vendor,
.cardname = "ni6510",
.config = 0x1,
},
{
.id0 = NI65_EB_ID0,
.id1 = NI65_EB_ID1,
.id_offset = 0x0e,
.total_size = 0x18,
.cmd_offset = 0x10,
.addr_offset = 0x0,
.vendor_id = ni_vendor,
.cardname = "ni6510 EtherBlaster",
.config = 0x2,
},
{
.id0 = NE2100_ID0,
.id1 = NE2100_ID1,
.id_offset = 0x0e,
.total_size = 0x18,
.cmd_offset = 0x10,
.addr_offset = 0x0,
.vendor_id = NULL,
.cardname = "generic NE2100",
.config = 0x0,
},
};
#define NUM_CARDS 3
struct priv
{
struct rmd rmdhead[RMDNUM];
struct tmd tmdhead[TMDNUM];
struct init_block ib;
int rmdnum;
int tmdnum,tmdlast;
#ifdef RCV_VIA_SKB
struct sk_buff *recv_skb[RMDNUM];
#else
void *recvbounce[RMDNUM];
#endif
#ifdef XMT_VIA_SKB
struct sk_buff *tmd_skb[TMDNUM];
#endif
void *tmdbounce[TMDNUM];
int tmdbouncenum;
int lock,xmit_queued;
void *self;
int cmdr_addr;
int cardno;
int features;
spinlock_t ring_lock;
};
static int ni65_probe1(struct net_device *dev,int);
static irqreturn_t ni65_interrupt(int irq, void * dev_id);
static void ni65_recv_intr(struct net_device *dev,int);
static void ni65_xmit_intr(struct net_device *dev,int);
static int ni65_open(struct net_device *dev);
static int ni65_lance_reinit(struct net_device *dev);
static void ni65_init_lance(struct priv *p,unsigned char*,int,int);
static netdev_tx_t ni65_send_packet(struct sk_buff *skb,
struct net_device *dev);
static void ni65_timeout(struct net_device *dev);
static int ni65_close(struct net_device *dev);
static int ni65_alloc_buffer(struct net_device *dev);
static void ni65_free_buffer(struct priv *p);
static void set_multicast_list(struct net_device *dev);
static int irqtab[] __initdata = { 9,12,15,5 }; /* irq config-translate */
static int dmatab[] __initdata = { 0,3,5,6,7 }; /* dma config-translate and autodetect */
static int debuglevel = 1;
/*
* set 'performance' registers .. we must STOP lance for that
*/
static void ni65_set_performance(struct priv *p)
{
writereg(CSR0_STOP | CSR0_CLRALL,CSR0); /* STOP */
if( !(cards[p->cardno].config & 0x02) )
return;
outw(80,PORT+L_ADDRREG);
if(inw(PORT+L_ADDRREG) != 80)
return;
writereg( (csr80 & 0x3fff) ,80); /* FIFO watermarks */
outw(0,PORT+L_ADDRREG);
outw((short)isa0,PORT+L_BUSIF); /* write ISA 0: DMA_R : isa0 * 50ns */
outw(1,PORT+L_ADDRREG);
outw((short)isa1,PORT+L_BUSIF); /* write ISA 1: DMA_W : isa1 * 50ns */
outw(CSR0,PORT+L_ADDRREG); /* switch back to CSR0 */
}
/*
* open interface (up)
*/
static int ni65_open(struct net_device *dev)
{
struct priv *p = dev->ml_priv;
int irqval = request_irq(dev->irq, ni65_interrupt,0,
cards[p->cardno].cardname,dev);
if (irqval) {
printk(KERN_ERR "%s: unable to get IRQ %d (irqval=%d).\n",
dev->name,dev->irq, irqval);
return -EAGAIN;
}
if(ni65_lance_reinit(dev))
{
netif_start_queue(dev);
return 0;
}
else
{
free_irq(dev->irq,dev);
return -EAGAIN;
}
}
/*
* close interface (down)
*/
static int ni65_close(struct net_device *dev)
{
struct priv *p = dev->ml_priv;
netif_stop_queue(dev);
outw(inw(PORT+L_RESET),PORT+L_RESET); /* that's the hard way */
#ifdef XMT_VIA_SKB
{
int i;
for(i=0;i<TMDNUM;i++)
{
if(p->tmd_skb[i]) {
dev_kfree_skb(p->tmd_skb[i]);
p->tmd_skb[i] = NULL;
}
}
}
#endif
free_irq(dev->irq,dev);
return 0;
}
static void cleanup_card(struct net_device *dev)
{
struct priv *p = dev->ml_priv;
disable_dma(dev->dma);
free_dma(dev->dma);
release_region(dev->base_addr, cards[p->cardno].total_size);
ni65_free_buffer(p);
}
/* set: io,irq,dma or set it when calling insmod */
static int irq;
static int io;
static int dma;
/*
* Probe The Card (not the lance-chip)
*/
struct net_device * __init ni65_probe(int unit)
{
struct net_device *dev = alloc_etherdev(0);
static const int ports[] = { 0x360, 0x300, 0x320, 0x340, 0 };
const int *port;
int err = 0;
if (!dev)
return ERR_PTR(-ENOMEM);
if (unit >= 0) {
sprintf(dev->name, "eth%d", unit);
netdev_boot_setup_check(dev);
irq = dev->irq;
dma = dev->dma;
} else {
dev->base_addr = io;
}
if (dev->base_addr > 0x1ff) { /* Check a single specified location. */
err = ni65_probe1(dev, dev->base_addr);
} else if (dev->base_addr > 0) { /* Don't probe at all. */
err = -ENXIO;
} else {
for (port = ports; *port && ni65_probe1(dev, *port); port++)
;
if (!*port)
err = -ENODEV;
}
if (err)
goto out;
err = register_netdev(dev);
if (err)
goto out1;
return dev;
out1:
cleanup_card(dev);
out:
free_netdev(dev);
return ERR_PTR(err);
}
static const struct net_device_ops ni65_netdev_ops = {
.ndo_open = ni65_open,
.ndo_stop = ni65_close,
.ndo_start_xmit = ni65_send_packet,
.ndo_tx_timeout = ni65_timeout,
.ndo_set_rx_mode = set_multicast_list,
.ndo_change_mtu = eth_change_mtu,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
};
/*
* this is the real card probe ..
*/
static int __init ni65_probe1(struct net_device *dev,int ioaddr)
{
int i,j;
struct priv *p;
unsigned long flags;
dev->irq = irq;
dev->dma = dma;
for(i=0;i<NUM_CARDS;i++) {
if(!request_region(ioaddr, cards[i].total_size, cards[i].cardname))
continue;
if(cards[i].id_offset >= 0) {
if(inb(ioaddr+cards[i].id_offset+0) != cards[i].id0 ||
inb(ioaddr+cards[i].id_offset+1) != cards[i].id1) {
release_region(ioaddr, cards[i].total_size);
continue;
}
}
if(cards[i].vendor_id) {
for(j=0;j<3;j++)
if(inb(ioaddr+cards[i].addr_offset+j) != cards[i].vendor_id[j]) {
release_region(ioaddr, cards[i].total_size);
continue;
}
}
break;
}
if(i == NUM_CARDS)
return -ENODEV;
for(j=0;j<6;j++)
dev->dev_addr[j] = inb(ioaddr+cards[i].addr_offset+j);
if( (j=ni65_alloc_buffer(dev)) < 0) {
release_region(ioaddr, cards[i].total_size);
return j;
}
p = dev->ml_priv;
p->cmdr_addr = ioaddr + cards[i].cmd_offset;
p->cardno = i;
spin_lock_init(&p->ring_lock);
printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cards[p->cardno].cardname , ioaddr);
outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
if( (j=readreg(CSR0)) != 0x4) {
printk("failed.\n");
printk(KERN_ERR "%s: Can't RESET card: %04x\n", dev->name, j);
ni65_free_buffer(p);
release_region(ioaddr, cards[p->cardno].total_size);
return -EAGAIN;
}
outw(88,PORT+L_ADDRREG);
if(inw(PORT+L_ADDRREG) == 88) {
unsigned long v;
v = inw(PORT+L_DATAREG);
v <<= 16;
outw(89,PORT+L_ADDRREG);
v |= inw(PORT+L_DATAREG);
printk("Version %#08lx, ",v);
p->features = INIT_RING_BEFORE_START;
}
else {
printk("ancient LANCE, ");
p->features = 0x0;
}
if(test_bit(0,&cards[i].config)) {
dev->irq = irqtab[(inw(ioaddr+L_CONFIG)>>2)&3];
dev->dma = dmatab[inw(ioaddr+L_CONFIG)&3];
printk("IRQ %d (from card), DMA %d (from card).\n",dev->irq,dev->dma);
}
else {
if(dev->dma == 0) {
/* 'stuck test' from lance.c */
unsigned long dma_channels =
((inb(DMA1_STAT_REG) >> 4) & 0x0f)
| (inb(DMA2_STAT_REG) & 0xf0);
for(i=1;i<5;i++) {
int dma = dmatab[i];
if(test_bit(dma,&dma_channels) || request_dma(dma,"ni6510"))
continue;
flags=claim_dma_lock();
disable_dma(dma);
set_dma_mode(dma,DMA_MODE_CASCADE);
enable_dma(dma);
release_dma_lock(flags);
ni65_init_lance(p,dev->dev_addr,0,0); /* trigger memory access */
flags=claim_dma_lock();
disable_dma(dma);
free_dma(dma);
release_dma_lock(flags);
if(readreg(CSR0) & CSR0_IDON)
break;
}
if(i == 5) {
printk("failed.\n");
printk(KERN_ERR "%s: Can't detect DMA channel!\n", dev->name);
ni65_free_buffer(p);
release_region(ioaddr, cards[p->cardno].total_size);
return -EAGAIN;
}
dev->dma = dmatab[i];
printk("DMA %d (autodetected), ",dev->dma);
}
else
printk("DMA %d (assigned), ",dev->dma);
if(dev->irq < 2)
{
unsigned long irq_mask;
ni65_init_lance(p,dev->dev_addr,0,0);
irq_mask = probe_irq_on();
writereg(CSR0_INIT|CSR0_INEA,CSR0); /* trigger interrupt */
msleep(20);
dev->irq = probe_irq_off(irq_mask);
if(!dev->irq)
{
printk("Failed to detect IRQ line!\n");
ni65_free_buffer(p);
release_region(ioaddr, cards[p->cardno].total_size);
return -EAGAIN;
}
printk("IRQ %d (autodetected).\n",dev->irq);
}
else
printk("IRQ %d (assigned).\n",dev->irq);
}
if(request_dma(dev->dma, cards[p->cardno].cardname ) != 0)
{
printk(KERN_ERR "%s: Can't request dma-channel %d\n",dev->name,(int) dev->dma);
ni65_free_buffer(p);
release_region(ioaddr, cards[p->cardno].total_size);
return -EAGAIN;
}
dev->base_addr = ioaddr;
dev->netdev_ops = &ni65_netdev_ops;
dev->watchdog_timeo = HZ/2;
return 0; /* everything is OK */
}
/*
* set lance register and trigger init
*/
static void ni65_init_lance(struct priv *p,unsigned char *daddr,int filter,int mode)
{
int i;
u32 pib;
writereg(CSR0_CLRALL|CSR0_STOP,CSR0);
for(i=0;i<6;i++)
p->ib.eaddr[i] = daddr[i];
for(i=0;i<8;i++)
p->ib.filter[i] = filter;
p->ib.mode = mode;
p->ib.trp = (u32) isa_virt_to_bus(p->tmdhead) | TMDNUMMASK;
p->ib.rrp = (u32) isa_virt_to_bus(p->rmdhead) | RMDNUMMASK;
writereg(0,CSR3); /* busmaster/no word-swap */
pib = (u32) isa_virt_to_bus(&p->ib);
writereg(pib & 0xffff,CSR1);
writereg(pib >> 16,CSR2);
writereg(CSR0_INIT,CSR0); /* this changes L_ADDRREG to CSR0 */
for(i=0;i<32;i++)
{
mdelay(4);
if(inw(PORT+L_DATAREG) & (CSR0_IDON | CSR0_MERR) )
break; /* init ok ? */
}
}
/*
* allocate memory area and check the 16MB border
*/
static void *ni65_alloc_mem(struct net_device *dev,char *what,int size,int type)
{
struct sk_buff *skb=NULL;
unsigned char *ptr;
void *ret;
if(type) {
ret = skb = alloc_skb(2+16+size,GFP_KERNEL|GFP_DMA);
if(!skb) {
printk(KERN_WARNING "%s: unable to allocate %s memory.\n",dev->name,what);
return NULL;
}
skb_reserve(skb,2+16);
skb_put(skb,R_BUF_SIZE); /* grab the whole space .. (not necessary) */
ptr = skb->data;
}
else {
ret = ptr = kmalloc(T_BUF_SIZE,GFP_KERNEL | GFP_DMA);
if(!ret)
return NULL;
}
if( (u32) virt_to_phys(ptr+size) > 0x1000000) {
printk(KERN_WARNING "%s: unable to allocate %s memory in lower 16MB!\n",dev->name,what);
if(type)
kfree_skb(skb);
else
kfree(ptr);
return NULL;
}
return ret;
}
/*
* allocate all memory structures .. send/recv buffers etc ...
*/
static int ni65_alloc_buffer(struct net_device *dev)
{
unsigned char *ptr;
struct priv *p;
int i;
/*
* we need 8-aligned memory ..
*/
ptr = ni65_alloc_mem(dev,"BUFFER",sizeof(struct priv)+8,0);
if(!ptr)
return -ENOMEM;
p = dev->ml_priv = (struct priv *) (((unsigned long) ptr + 7) & ~0x7);
memset((char *)p, 0, sizeof(struct priv));
p->self = ptr;
for(i=0;i<TMDNUM;i++)
{
#ifdef XMT_VIA_SKB
p->tmd_skb[i] = NULL;
#endif
p->tmdbounce[i] = ni65_alloc_mem(dev,"XMIT",T_BUF_SIZE,0);
if(!p->tmdbounce[i]) {
ni65_free_buffer(p);
return -ENOMEM;
}
}
for(i=0;i<RMDNUM;i++)
{
#ifdef RCV_VIA_SKB
p->recv_skb[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,1);
if(!p->recv_skb[i]) {
ni65_free_buffer(p);
return -ENOMEM;
}
#else
p->recvbounce[i] = ni65_alloc_mem(dev,"RECV",R_BUF_SIZE,0);
if(!p->recvbounce[i]) {
ni65_free_buffer(p);
return -ENOMEM;
}
#endif
}
return 0; /* everything is OK */
}
/*
* free buffers and private struct
*/
static void ni65_free_buffer(struct priv *p)
{
int i;
if(!p)
return;
for(i=0;i<TMDNUM;i++) {
kfree(p->tmdbounce[i]);
#ifdef XMT_VIA_SKB
if(p->tmd_skb[i])
dev_kfree_skb(p->tmd_skb[i]);
#endif
}
for(i=0;i<RMDNUM;i++)
{
#ifdef RCV_VIA_SKB
if(p->recv_skb[i])
dev_kfree_skb(p->recv_skb[i]);
#else
kfree(p->recvbounce[i]);
#endif
}
kfree(p->self);
}
/*
* stop and (re)start lance .. e.g after an error
*/
static void ni65_stop_start(struct net_device *dev,struct priv *p)
{
int csr0 = CSR0_INEA;
writedatareg(CSR0_STOP);
if(debuglevel > 1)
printk(KERN_DEBUG "ni65_stop_start\n");
if(p->features & INIT_RING_BEFORE_START) {
int i;
#ifdef XMT_VIA_SKB
struct sk_buff *skb_save[TMDNUM];
#endif
unsigned long buffer[TMDNUM];
short blen[TMDNUM];
if(p->xmit_queued) {
while(1) {
if((p->tmdhead[p->tmdlast].u.s.status & XMIT_OWN))
break;
p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
if(p->tmdlast == p->tmdnum)
break;
}
}
for(i=0;i<TMDNUM;i++) {
struct tmd *tmdp = p->tmdhead + i;
#ifdef XMT_VIA_SKB
skb_save[i] = p->tmd_skb[i];
#endif
buffer[i] = (u32) isa_bus_to_virt(tmdp->u.buffer);
blen[i] = tmdp->blen;
tmdp->u.s.status = 0x0;
}
for(i=0;i<RMDNUM;i++) {
struct rmd *rmdp = p->rmdhead + i;
rmdp->u.s.status = RCV_OWN;
}
p->tmdnum = p->xmit_queued = 0;
writedatareg(CSR0_STRT | csr0);
for(i=0;i<TMDNUM;i++) {
int num = (i + p->tmdlast) & (TMDNUM-1);
p->tmdhead[i].u.buffer = (u32) isa_virt_to_bus((char *)buffer[num]); /* status is part of buffer field */
p->tmdhead[i].blen = blen[num];
if(p->tmdhead[i].u.s.status & XMIT_OWN) {
p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
p->xmit_queued = 1;
writedatareg(CSR0_TDMD | CSR0_INEA | csr0);
}
#ifdef XMT_VIA_SKB
p->tmd_skb[i] = skb_save[num];
#endif
}
p->rmdnum = p->tmdlast = 0;
if(!p->lock)
if (p->tmdnum || !p->xmit_queued)
netif_wake_queue(dev);
dev->trans_start = jiffies; /* prevent tx timeout */
}
else
writedatareg(CSR0_STRT | csr0);
}
/*
* init lance (write init-values .. init-buffers) (open-helper)
*/
static int ni65_lance_reinit(struct net_device *dev)
{
int i;
struct priv *p = dev->ml_priv;
unsigned long flags;
p->lock = 0;
p->xmit_queued = 0;
flags=claim_dma_lock();
disable_dma(dev->dma); /* I've never worked with dma, but we do it like the packetdriver */
set_dma_mode(dev->dma,DMA_MODE_CASCADE);
enable_dma(dev->dma);
release_dma_lock(flags);
outw(inw(PORT+L_RESET),PORT+L_RESET); /* first: reset the card */
if( (i=readreg(CSR0) ) != 0x4)
{
printk(KERN_ERR "%s: can't RESET %s card: %04x\n",dev->name,
cards[p->cardno].cardname,(int) i);
flags=claim_dma_lock();
disable_dma(dev->dma);
release_dma_lock(flags);
return 0;
}
p->rmdnum = p->tmdnum = p->tmdlast = p->tmdbouncenum = 0;
for(i=0;i<TMDNUM;i++)
{
struct tmd *tmdp = p->tmdhead + i;
#ifdef XMT_VIA_SKB
if(p->tmd_skb[i]) {
dev_kfree_skb(p->tmd_skb[i]);
p->tmd_skb[i] = NULL;
}
#endif
tmdp->u.buffer = 0x0;
tmdp->u.s.status = XMIT_START | XMIT_END;
tmdp->blen = tmdp->status2 = 0;
}
for(i=0;i<RMDNUM;i++)
{
struct rmd *rmdp = p->rmdhead + i;
#ifdef RCV_VIA_SKB
rmdp->u.buffer = (u32) isa_virt_to_bus(p->recv_skb[i]->data);
#else
rmdp->u.buffer = (u32) isa_virt_to_bus(p->recvbounce[i]);
#endif
rmdp->blen = -(R_BUF_SIZE-8);
rmdp->mlen = 0;
rmdp->u.s.status = RCV_OWN;
}
if(dev->flags & IFF_PROMISC)
ni65_init_lance(p,dev->dev_addr,0x00,M_PROM);
else if (netdev_mc_count(dev) || dev->flags & IFF_ALLMULTI)
ni65_init_lance(p,dev->dev_addr,0xff,0x0);
else
ni65_init_lance(p,dev->dev_addr,0x00,0x00);
/*
* ni65_set_lance_mem() sets L_ADDRREG to CSR0
* NOW, WE WILL NEVER CHANGE THE L_ADDRREG, CSR0 IS ALWAYS SELECTED
*/
if(inw(PORT+L_DATAREG) & CSR0_IDON) {
ni65_set_performance(p);
/* init OK: start lance , enable interrupts */
writedatareg(CSR0_CLRALL | CSR0_INEA | CSR0_STRT);
return 1; /* ->OK */
}
printk(KERN_ERR "%s: can't init lance, status: %04x\n",dev->name,(int) inw(PORT+L_DATAREG));
flags=claim_dma_lock();
disable_dma(dev->dma);
release_dma_lock(flags);
return 0; /* ->Error */
}
/*
* interrupt handler
*/
static irqreturn_t ni65_interrupt(int irq, void * dev_id)
{
int csr0 = 0;
struct net_device *dev = dev_id;
struct priv *p;
int bcnt = 32;
p = dev->ml_priv;
spin_lock(&p->ring_lock);
while(--bcnt) {
csr0 = inw(PORT+L_DATAREG);
#if 0
writedatareg( (csr0 & CSR0_CLRALL) ); /* ack interrupts, disable int. */
#else
writedatareg( (csr0 & CSR0_CLRALL) | CSR0_INEA ); /* ack interrupts, interrupts enabled */
#endif
if(!(csr0 & (CSR0_ERR | CSR0_RINT | CSR0_TINT)))
break;
if(csr0 & CSR0_RINT) /* RECV-int? */
ni65_recv_intr(dev,csr0);
if(csr0 & CSR0_TINT) /* XMIT-int? */
ni65_xmit_intr(dev,csr0);
if(csr0 & CSR0_ERR)
{
if(debuglevel > 1)
printk(KERN_ERR "%s: general error: %04x.\n",dev->name,csr0);
if(csr0 & CSR0_BABL)
dev->stats.tx_errors++;
if(csr0 & CSR0_MISS) {
int i;
for(i=0;i<RMDNUM;i++)
printk("%02x ",p->rmdhead[i].u.s.status);
printk("\n");
dev->stats.rx_errors++;
}
if(csr0 & CSR0_MERR) {
if(debuglevel > 1)
printk(KERN_ERR "%s: Ooops .. memory error: %04x.\n",dev->name,csr0);
ni65_stop_start(dev,p);
}
}
}
#ifdef RCV_PARANOIA_CHECK
{
int j;
for(j=0;j<RMDNUM;j++)
{
int i, num2;
for(i=RMDNUM-1;i>0;i--) {
num2 = (p->rmdnum + i) & (RMDNUM-1);
if(!(p->rmdhead[num2].u.s.status & RCV_OWN))
break;
}
if(i) {
int k, num1;
for(k=0;k<RMDNUM;k++) {
num1 = (p->rmdnum + k) & (RMDNUM-1);
if(!(p->rmdhead[num1].u.s.status & RCV_OWN))
break;
}
if(!k)
break;
if(debuglevel > 0)
{
char buf[256],*buf1;
buf1 = buf;
for(k=0;k<RMDNUM;k++) {
sprintf(buf1,"%02x ",(p->rmdhead[k].u.s.status)); /* & RCV_OWN) ); */
buf1 += 3;
}
*buf1 = 0;
printk(KERN_ERR "%s: Ooops, receive ring corrupted %2d %2d | %s\n",dev->name,p->rmdnum,i,buf);
}
p->rmdnum = num1;
ni65_recv_intr(dev,csr0);
if((p->rmdhead[num2].u.s.status & RCV_OWN))
break; /* ok, we are 'in sync' again */
}
else
break;
}
}
#endif
if( (csr0 & (CSR0_RXON | CSR0_TXON)) != (CSR0_RXON | CSR0_TXON) ) {
printk(KERN_DEBUG "%s: RX or TX was offline -> restart\n",dev->name);
ni65_stop_start(dev,p);
}
else
writedatareg(CSR0_INEA);
spin_unlock(&p->ring_lock);
return IRQ_HANDLED;
}
/*
* We have received an Xmit-Interrupt ..
* send a new packet if necessary
*/
static void ni65_xmit_intr(struct net_device *dev,int csr0)
{
struct priv *p = dev->ml_priv;
while(p->xmit_queued)
{
struct tmd *tmdp = p->tmdhead + p->tmdlast;
int tmdstat = tmdp->u.s.status;
if(tmdstat & XMIT_OWN)
break;
if(tmdstat & XMIT_ERR)
{
#if 0
if(tmdp->status2 & XMIT_TDRMASK && debuglevel > 3)
printk(KERN_ERR "%s: tdr-problems (e.g. no resistor)\n",dev->name);
#endif
/* checking some errors */
if(tmdp->status2 & XMIT_RTRY)
dev->stats.tx_aborted_errors++;
if(tmdp->status2 & XMIT_LCAR)
dev->stats.tx_carrier_errors++;
if(tmdp->status2 & (XMIT_BUFF | XMIT_UFLO )) {
/* this stops the xmitter */
dev->stats.tx_fifo_errors++;
if(debuglevel > 0)
printk(KERN_ERR "%s: Xmit FIFO/BUFF error\n",dev->name);
if(p->features & INIT_RING_BEFORE_START) {
tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END; /* test: resend this frame */
ni65_stop_start(dev,p);
break; /* no more Xmit processing .. */
}
else
ni65_stop_start(dev,p);
}
if(debuglevel > 2)
printk(KERN_ERR "%s: xmit-error: %04x %02x-%04x\n",dev->name,csr0,(int) tmdstat,(int) tmdp->status2);
if(!(csr0 & CSR0_BABL)) /* don't count errors twice */
dev->stats.tx_errors++;
tmdp->status2 = 0;
}
else {
dev->stats.tx_bytes -= (short)(tmdp->blen);
dev->stats.tx_packets++;
}
#ifdef XMT_VIA_SKB
if(p->tmd_skb[p->tmdlast]) {
dev_kfree_skb_irq(p->tmd_skb[p->tmdlast]);
p->tmd_skb[p->tmdlast] = NULL;
}
#endif
p->tmdlast = (p->tmdlast + 1) & (TMDNUM-1);
if(p->tmdlast == p->tmdnum)
p->xmit_queued = 0;
}
netif_wake_queue(dev);
}
/*
* We have received a packet
*/
static void ni65_recv_intr(struct net_device *dev,int csr0)
{
struct rmd *rmdp;
int rmdstat,len;
int cnt=0;
struct priv *p = dev->ml_priv;
rmdp = p->rmdhead + p->rmdnum;
while(!( (rmdstat = rmdp->u.s.status) & RCV_OWN))
{
cnt++;
if( (rmdstat & (RCV_START | RCV_END | RCV_ERR)) != (RCV_START | RCV_END) ) /* error or oversized? */
{
if(!(rmdstat & RCV_ERR)) {
if(rmdstat & RCV_START)
{
dev->stats.rx_length_errors++;
printk(KERN_ERR "%s: recv, packet too long: %d\n",dev->name,rmdp->mlen & 0x0fff);
}
}
else {
if(debuglevel > 2)
printk(KERN_ERR "%s: receive-error: %04x, lance-status: %04x/%04x\n",
dev->name,(int) rmdstat,csr0,(int) inw(PORT+L_DATAREG) );
if(rmdstat & RCV_FRAM)
dev->stats.rx_frame_errors++;
if(rmdstat & RCV_OFLO)
dev->stats.rx_over_errors++;
if(rmdstat & RCV_CRC)
dev->stats.rx_crc_errors++;
if(rmdstat & RCV_BUF_ERR)
dev->stats.rx_fifo_errors++;
}
if(!(csr0 & CSR0_MISS)) /* don't count errors twice */
dev->stats.rx_errors++;
}
else if( (len = (rmdp->mlen & 0x0fff) - 4) >= 60)
{
#ifdef RCV_VIA_SKB
struct sk_buff *skb = alloc_skb(R_BUF_SIZE+2+16,GFP_ATOMIC);
if (skb)
skb_reserve(skb,16);
#else
struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
#endif
if(skb)
{
skb_reserve(skb,2);
#ifdef RCV_VIA_SKB
if( (unsigned long) (skb->data + R_BUF_SIZE) > 0x1000000) {
skb_put(skb,len);
skb_copy_to_linear_data(skb, (unsigned char *)(p->recv_skb[p->rmdnum]->data),len);
}
else {
struct sk_buff *skb1 = p->recv_skb[p->rmdnum];
skb_put(skb,R_BUF_SIZE);
p->recv_skb[p->rmdnum] = skb;
rmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
skb = skb1;
skb_trim(skb,len);
}
#else
skb_put(skb,len);
skb_copy_to_linear_data(skb, (unsigned char *) p->recvbounce[p->rmdnum],len);
#endif
dev->stats.rx_packets++;
dev->stats.rx_bytes += len;
skb->protocol=eth_type_trans(skb,dev);
netif_rx(skb);
}
else
{
printk(KERN_ERR "%s: can't alloc new sk_buff\n",dev->name);
dev->stats.rx_dropped++;
}
}
else {
printk(KERN_INFO "%s: received runt packet\n",dev->name);
dev->stats.rx_errors++;
}
rmdp->blen = -(R_BUF_SIZE-8);
rmdp->mlen = 0;
rmdp->u.s.status = RCV_OWN; /* change owner */
p->rmdnum = (p->rmdnum + 1) & (RMDNUM-1);
rmdp = p->rmdhead + p->rmdnum;
}
}
/*
* kick xmitter ..
*/
static void ni65_timeout(struct net_device *dev)
{
int i;
struct priv *p = dev->ml_priv;
printk(KERN_ERR "%s: xmitter timed out, try to restart!\n",dev->name);
for(i=0;i<TMDNUM;i++)
printk("%02x ",p->tmdhead[i].u.s.status);
printk("\n");
ni65_lance_reinit(dev);
dev->trans_start = jiffies; /* prevent tx timeout */
netif_wake_queue(dev);
}
/*
* Send a packet
*/
static netdev_tx_t ni65_send_packet(struct sk_buff *skb,
struct net_device *dev)
{
struct priv *p = dev->ml_priv;
netif_stop_queue(dev);
if (test_and_set_bit(0, (void*)&p->lock)) {
printk(KERN_ERR "%s: Queue was locked.\n", dev->name);
return NETDEV_TX_BUSY;
}
{
short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
struct tmd *tmdp;
unsigned long flags;
#ifdef XMT_VIA_SKB
if( (unsigned long) (skb->data + skb->len) > 0x1000000) {
#endif
skb_copy_from_linear_data(skb, p->tmdbounce[p->tmdbouncenum],
skb->len > T_BUF_SIZE ? T_BUF_SIZE :
skb->len);
if (len > skb->len)
memset((char *)p->tmdbounce[p->tmdbouncenum]+skb->len, 0, len-skb->len);
dev_kfree_skb (skb);
spin_lock_irqsave(&p->ring_lock, flags);
tmdp = p->tmdhead + p->tmdnum;
tmdp->u.buffer = (u32) isa_virt_to_bus(p->tmdbounce[p->tmdbouncenum]);
p->tmdbouncenum = (p->tmdbouncenum + 1) & (TMDNUM - 1);
#ifdef XMT_VIA_SKB
}
else {
spin_lock_irqsave(&p->ring_lock, flags);
tmdp = p->tmdhead + p->tmdnum;
tmdp->u.buffer = (u32) isa_virt_to_bus(skb->data);
p->tmd_skb[p->tmdnum] = skb;
}
#endif
tmdp->blen = -len;
tmdp->u.s.status = XMIT_OWN | XMIT_START | XMIT_END;
writedatareg(CSR0_TDMD | CSR0_INEA); /* enable xmit & interrupt */
p->xmit_queued = 1;
p->tmdnum = (p->tmdnum + 1) & (TMDNUM-1);
if(p->tmdnum != p->tmdlast)
netif_wake_queue(dev);
p->lock = 0;
spin_unlock_irqrestore(&p->ring_lock, flags);
}
return NETDEV_TX_OK;
}
static void set_multicast_list(struct net_device *dev)
{
if(!ni65_lance_reinit(dev))
printk(KERN_ERR "%s: Can't switch card into MC mode!\n",dev->name);
netif_wake_queue(dev);
}
#ifdef MODULE
static struct net_device *dev_ni65;
module_param(irq, int, 0);
module_param(io, int, 0);
module_param(dma, int, 0);
MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)");
MODULE_PARM_DESC(io, "ni6510 I/O base address");
MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)");
int __init init_module(void)
{
dev_ni65 = ni65_probe(-1);
return PTR_ERR_OR_ZERO(dev_ni65);
}
void __exit cleanup_module(void)
{
unregister_netdev(dev_ni65);
cleanup_card(dev_ni65);
free_netdev(dev_ni65);
}
#endif /* MODULE */
MODULE_LICENSE("GPL");
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