static void
ether1_recv_done (struct net_device *dev)
{
int status;
int nexttail, rbdaddr;
rbd_t rbd;
do {
status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS);
if ((status & RFD_COMPLETE) == 0)
break;
rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS);
ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE);
if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) {
int length = rbd.rbd_status & RBD_ACNT;
struct sk_buff *skb;
length = (length + 1) & ~1;
skb = dev_alloc_skb (length + 2);
if (skb) {
skb->dev = dev;
skb_reserve (skb, 2);
ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length);
skb->protocol = eth_type_trans (skb, dev);
netif_rx (skb);
priv(dev)->stats.rx_packets ++;
} else
priv(dev)->stats.rx_dropped ++;
} else {
printk(KERN_WARNING "%s: %s\n", dev->name,
(rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid");
priv(dev)->stats.rx_dropped ++;
}
nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS);
/* nexttail should be rx_head */
if (nexttail != priv(dev)->rx_head)
printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n",
dev->name, nexttail, priv(dev)->rx_head);
ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS);
ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS);
ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS);
ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS);
priv(dev)->rx_tail = nexttail;
priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS);
} while (1);
}
static irqreturn_t
ether1_interrupt (int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
int status;
status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS);
if (status) {
ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX),
SCB_ADDR, scb_t, scb_command, NORMALIRQS);
writeb(CTRL_CA | CTRL_ACK, REG_CONTROL);
if (status & SCB_STCX) {
ether1_xmit_done (dev);
}
if (status & SCB_STCNA) {
if (priv(dev)->resetting == 0)
printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name);
else
priv(dev)->resetting += 1;
if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
!= (unsigned short)I82586_NULL) {
ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
writeb(CTRL_CA, REG_CONTROL);
}
if (priv(dev)->resetting == 2)
priv(dev)->resetting = 0;
}
if (status & SCB_STFR) {
ether1_recv_done (dev);
}
if (status & SCB_STRNR) {
if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) {
printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name);
ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS);
writeb(CTRL_CA, REG_CONTROL);
dev->stats.rx_dropped++; /* we suspended due to lack of buffer space */
} else
printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name,
ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS));
printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset,
NORMALIRQS));
}
} else
writeb(CTRL_ACK, REG_CONTROL);
return IRQ_HANDLED;
}
static void
ether1_xmit_done (struct net_device *dev)
{
nop_t nop;
int caddr, tst;
caddr = priv(dev)->tx_tail;
again:
ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
switch (nop.nop_command & CMD_MASK) {
case CMD_TDR:
/* special case */
if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS)
!= (unsigned short)I82586_NULL) {
ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t,
scb_command, NORMALIRQS);
writeb(CTRL_CA, REG_CONTROL);
}
priv(dev)->tx_tail = NOP_ADDR;
return;
case CMD_NOP:
if (nop.nop_link == caddr) {
if (priv(dev)->initialising == 0)
printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name);
else
priv(dev)->initialising = 0;
return;
}
if (caddr == nop.nop_link)
return;
caddr = nop.nop_link;
goto again;
case CMD_TX:
if (nop.nop_status & STAT_COMPLETE)
break;
printk (KERN_ERR "%s: strange command complete without completed command\n", dev->name);
priv(dev)->restart = 1;
return;
default:
printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name,
nop.nop_command & CMD_MASK, caddr);
priv(dev)->restart = 1;
return;
}
while (nop.nop_status & STAT_COMPLETE) {
if (nop.nop_status & STAT_OK) {
dev->stats.tx_packets++;
dev->stats.collisions += (nop.nop_status & STAT_COLLISIONS);
} else {
dev->stats.tx_errors++;
if (nop.nop_status & STAT_COLLAFTERTX)
dev->stats.collisions++;
if (nop.nop_status & STAT_NOCARRIER)
dev->stats.tx_carrier_errors++;
if (nop.nop_status & STAT_TXLOSTCTS)
printk (KERN_WARNING "%s: cts lost\n", dev->name);
if (nop.nop_status & STAT_TXSLOWDMA)
dev->stats.tx_fifo_errors++;
if (nop.nop_status & STAT_COLLEXCESSIVE)
dev->stats.collisions += 16;
}
if (nop.nop_link == caddr) {
printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", dev->name);
break;
}
caddr = nop.nop_link;
ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
if ((nop.nop_command & CMD_MASK) != CMD_NOP) {
printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n", dev->name);
break;
}
if (caddr == nop.nop_link)
break;
caddr = nop.nop_link;
ether1_readbuffer (dev, &nop, caddr, NOP_SIZE);
if ((nop.nop_command & CMD_MASK) != CMD_TX) {
printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n", dev->name);
break;
}
}
priv(dev)->tx_tail = caddr;
caddr = priv(dev)->tx_head;
tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN);
priv(dev)->tx_head = caddr;
if (tst != -1)
netif_wake_queue(dev);
}
static int
ether1_init_for_open (struct net_device *dev)
{
int i, status, addr, next, next2;
int failures = 0;
unsigned long timeout;
writeb(CTRL_RST|CTRL_ACK, REG_CONTROL);
for (i = 0; i < 6; i++)
init_sa.sa_addr[i] = dev->dev_addr[i];
/* load data structures into ether1 RAM */
ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE);
ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE);
ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE);
ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE);
ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE);
ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE);
ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE);
ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE);
if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) {
printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n",
dev->name);
return 1;
}
/*
* setup circularly linked list of { rfd, rbd, buffer }, with
* all rfds circularly linked, rbds circularly linked.
* First rfd is linked to scp, first rbd is linked to first
* rfd. Last rbd has a suspend command.
*/
addr = RX_AREA_START;
do {
next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10;
if (next2 >= RX_AREA_END) {
next = RX_AREA_START;
init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND;
priv(dev)->rx_tail = addr;
} else
init_rfd.rfd_command = 0;
if (addr == RX_AREA_START)
init_rfd.rfd_rbdoffset = addr + RFD_SIZE;
else
init_rfd.rfd_rbdoffset = 0;
init_rfd.rfd_link = next;
init_rbd.rbd_link = next + RFD_SIZE;
init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE;
ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE);
ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE);
addr = next;
} while (next2 < RX_AREA_END);
priv(dev)->tx_link = NOP_ADDR;
priv(dev)->tx_head = NOP_ADDR + NOP_SIZE;
priv(dev)->tx_tail = TDR_ADDR;
priv(dev)->rx_head = RX_AREA_START;
/* release reset & give 586 a prod */
priv(dev)->resetting = 1;
priv(dev)->initialising = 1;
writeb(CTRL_RST, REG_CONTROL);
writeb(0, REG_CONTROL);
writeb(CTRL_CA, REG_CONTROL);
/* 586 should now unset iscp.busy */
timeout = jiffies + HZ/2;
while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) {
if (time_after(jiffies, timeout)) {
printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n", dev->name);
return 1;
}
}
/* check status of commands that we issued */
timeout += HZ/10;
while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS))
& STAT_COMPLETE) == 0) {
if (time_after(jiffies, timeout))
break;
}
if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n", dev->name, status);
printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
failures += 1;
}
timeout += HZ/10;
while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS))
& STAT_COMPLETE) == 0) {
if (time_after(jiffies, timeout))
break;
}
if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n", dev->name, status);
printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
failures += 1;
}
timeout += HZ/10;
while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS))
& STAT_COMPLETE) == 0) {
if (time_after(jiffies, timeout))
break;
}
if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n", dev->name, status);
printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
failures += 1;
}
timeout += HZ;
while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS))
& STAT_COMPLETE) == 0) {
if (time_after(jiffies, timeout))
break;
}
if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) {
printk (KERN_WARNING "%s: can't tdr (ignored)\n", dev->name);
printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name,
ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS),
ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS));
} else {
status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS);
if (status & TDR_XCVRPROB)
printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n", dev->name);
else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) {
#ifdef FANCY
printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us away\n", dev->name,
status & TDR_SHORT ? "short" : "open", (status & TDR_TIME) / 10,
(status & TDR_TIME) % 10);
#else
printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks away\n", dev->name,
status & TDR_SHORT ? "short" : "open", (status & TDR_TIME));
#endif
}
}
if (failures)
ether1_reset (dev);
return failures ? 1 : 0;
}
