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alistair23-linux/drivers/net/ethernet/amd/ni65.c
David Howells df29840815 Annotate hardware config module parameters in drivers/net/ethernet/ 
When the kernel is running in secure boot mode, we lock down the kernel to
prevent userspace from modifying the running kernel image.  Whilst this
includes prohibiting access to things like /dev/mem, it must also prevent
access by means of configuring driver modules in such a way as to cause a
device to access or modify the kernel image.

To this end, annotate module_param* statements that refer to hardware
configuration and indicate for future reference what type of parameter they
specify.  The parameter parser in the core sees this information and can
skip such parameters with an error message if the kernel is locked down.
The module initialisation then runs as normal, but just sees whatever the
default values for those parameters is.

Note that we do still need to do the module initialisation because some
drivers have viable defaults set in case parameters aren't specified and
some drivers support automatic configuration (e.g. PNP or PCI) in addition
to manually coded parameters.

This patch annotates drivers in drivers/net/ethernet/.

Suggested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steffen Klassert <steffen.klassert@secunet.com>
cc: Jaroslav Kysela <perex@perex.cz>
cc: netdev@vger.kernel.org
cc: linux-parisc@vger.kernel.org
2017-04-20 12:02:32 +01:00

1252 lines
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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_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);
netif_trans_update(dev); /* 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);
netif_trans_update(dev); /* 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_hw(irq, int, irq, 0);
module_param_hw(io, int, ioport, 0);
module_param_hw(dma, int, dma, 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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