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Commit 07fe9727 authored by Jeff Garzik's avatar Jeff Garzik
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Merge redhat.com:/spare/repo/linux-2.6 

into redhat.com:/spare/repo/netdev-2.6/epic100
parents 196c4ebd e38e1903
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Showing with 236 additions and 104 deletions
drivers/net/epic100.c
View file @ 07fe9727
......@@ -96,9 +96,9 @@ static int rx_copybreak;
Making the Tx ring too large decreases the effectiveness of channel
bonding and packet priority.
There are no ill effects from too-large receive rings. */
#define TX_RING_SIZE 16
#define TX_QUEUE_LEN 10 /* Limit ring entries actually used. */
#define RX_RING_SIZE 32
#define TX_RING_SIZE 256
#define TX_QUEUE_LEN 240 /* Limit ring entries actually used. */
#define RX_RING_SIZE 256
#define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct epic_tx_desc)
#define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct epic_rx_desc)
......@@ -292,6 +292,12 @@ enum CommandBits {
StopTxDMA=0x20, StopRxDMA=0x40, RestartTx=0x80,
};
#define EpicRemoved 0xffffffff /* Chip failed or removed (CardBus) */
#define EpicNapiEvent (TxEmpty | TxDone | \
RxDone | RxStarted | RxEarlyWarn | RxOverflow | RxFull)
#define EpicNormalEvent (0x0000ffff & ~EpicNapiEvent)
static u16 media2miictl[16] = {
0, 0x0C00, 0x0C00, 0x2000, 0x0100, 0x2100, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0 };
......@@ -330,9 +336,12 @@ struct epic_private {
/* Ring pointers. */
spinlock_t lock; /* Group with Tx control cache line. */
spinlock_t napi_lock;
unsigned int reschedule_in_poll;
unsigned int cur_tx, dirty_tx;
unsigned int cur_rx, dirty_rx;
u32 irq_mask;
unsigned int rx_buf_sz; /* Based on MTU+slack. */
struct pci_dev *pci_dev; /* PCI bus location. */
......@@ -359,7 +368,8 @@ static void epic_timer(unsigned long data);
static void epic_tx_timeout(struct net_device *dev);
static void epic_init_ring(struct net_device *dev);
static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev);
static int epic_rx(struct net_device *dev);
static int epic_rx(struct net_device *dev, int budget);
static int epic_poll(struct net_device *dev, int *budget);
static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static struct ethtool_ops netdev_ethtool_ops;
......@@ -378,7 +388,7 @@ static int __devinit epic_init_one (struct pci_dev *pdev,
int irq;
struct net_device *dev;
struct epic_private *ep;
int i, option = 0, duplex = 0;
int i, ret, option = 0, duplex = 0;
void *ring_space;
dma_addr_t ring_dma;
......@@ -392,29 +402,33 @@ static int __devinit epic_init_one (struct pci_dev *pdev,
card_idx++;
i = pci_enable_device(pdev);
if (i)
return i;
ret = pci_enable_device(pdev);
if (ret)
goto out;
irq = pdev->irq;
if (pci_resource_len(pdev, 0) < pci_id_tbl[chip_idx].io_size) {
printk (KERN_ERR "card %d: no PCI region space\n", card_idx);
return -ENODEV;
ret = -ENODEV;
goto err_out_disable;
}
pci_set_master(pdev);
ret = pci_request_regions(pdev, DRV_NAME);
if (ret < 0)
goto err_out_disable;
ret = -ENOMEM;
dev = alloc_etherdev(sizeof (*ep));
if (!dev) {
printk (KERN_ERR "card %d: no memory for eth device\n", card_idx);
return -ENOMEM;
goto err_out_free_res;
}
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
if (pci_request_regions(pdev, DRV_NAME))
goto err_out_free_netdev;
#ifdef USE_IO_OPS
ioaddr = pci_resource_start (pdev, 0);
#else
......@@ -422,7 +436,7 @@ static int __devinit epic_init_one (struct pci_dev *pdev,
ioaddr = (long) ioremap (ioaddr, pci_resource_len (pdev, 1));
if (!ioaddr) {
printk (KERN_ERR DRV_NAME " %d: ioremap failed\n", card_idx);
goto err_out_free_res;
goto err_out_free_netdev;
}
#endif
......@@ -459,7 +473,9 @@ static int __devinit epic_init_one (struct pci_dev *pdev,
dev->base_addr = ioaddr;
dev->irq = irq;
spin_lock_init (&ep->lock);
spin_lock_init(&ep->lock);
spin_lock_init(&ep->napi_lock);
ep->reschedule_in_poll = 0;
/* Bring the chip out of low-power mode. */
outl(0x4200, ioaddr + GENCTL);
......@@ -489,6 +505,9 @@ static int __devinit epic_init_one (struct pci_dev *pdev,
ep->pci_dev = pdev;
ep->chip_id = chip_idx;
ep->chip_flags = pci_id_tbl[chip_idx].drv_flags;
ep->irq_mask =
(ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
| CntFull | TxUnderrun | EpicNapiEvent;
/* Find the connected MII xcvrs.
Doing this in open() would allow detecting external xcvrs later, but
......@@ -543,10 +562,12 @@ static int __devinit epic_init_one (struct pci_dev *pdev,
dev->ethtool_ops = &netdev_ethtool_ops;
dev->watchdog_timeo = TX_TIMEOUT;
dev->tx_timeout = &epic_tx_timeout;
dev->poll = epic_poll;
dev->weight = 64;
i = register_netdev(dev);
if (i)
goto err_out_unmap_tx;
ret = register_netdev(dev);
if (ret < 0)
goto err_out_unmap_rx;
printk(KERN_INFO "%s: %s at %#lx, IRQ %d, ",
dev->name, pci_id_tbl[chip_idx].name, ioaddr, dev->irq);
......@@ -554,19 +575,24 @@ static int __devinit epic_init_one (struct pci_dev *pdev,
printk("%2.2x:", dev->dev_addr[i]);
printk("%2.2x.\n", dev->dev_addr[i]);
return 0;
out:
return ret;
err_out_unmap_rx:
pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma);
err_out_unmap_tx:
pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma);
err_out_iounmap:
#ifndef USE_IO_OPS
iounmap(ioaddr);
err_out_free_res:
#endif
pci_release_regions(pdev);
err_out_free_netdev:
#endif
free_netdev(dev);
return -ENODEV;
err_out_free_res:
pci_release_regions(pdev);
err_out_disable:
pci_disable_device(pdev);
goto out;
}
/* Serial EEPROM section. */
......@@ -592,6 +618,36 @@ static int __devinit epic_init_one (struct pci_dev *pdev,
#define EE_READ256_CMD (6 << 8)
#define EE_ERASE_CMD (7 << 6)
static void epic_disable_int(struct net_device *dev, struct epic_private *ep)
{
long ioaddr = dev->base_addr;
outl(0x00000000, ioaddr + INTMASK);
}
static inline void __epic_pci_commit(long ioaddr)
{
#ifndef USE_IO_OPS
inl(ioaddr + INTMASK);
#endif
}
static void epic_napi_irq_off(struct net_device *dev, struct epic_private *ep)
{
long ioaddr = dev->base_addr;
outl(ep->irq_mask & ~EpicNapiEvent, ioaddr + INTMASK);
__epic_pci_commit(ioaddr);
}
static void epic_napi_irq_on(struct net_device *dev, struct epic_private *ep)
{
long ioaddr = dev->base_addr;
/* No need to commit possible posted write */
outl(ep->irq_mask | EpicNapiEvent, ioaddr + INTMASK);
}
static int __devinit read_eeprom(long ioaddr, int location)
{
int i;
......@@ -752,9 +808,8 @@ static int epic_open(struct net_device *dev)
/* Enable interrupts by setting the interrupt mask. */
outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
| CntFull | TxUnderrun | TxDone | TxEmpty
| RxError | RxOverflow | RxFull | RxHeader | RxDone,
ioaddr + INTMASK);
| CntFull | TxUnderrun
| RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
if (debug > 1)
printk(KERN_DEBUG "%s: epic_open() ioaddr %lx IRQ %d status %4.4x "
......@@ -795,7 +850,7 @@ static void epic_pause(struct net_device *dev)
}
/* Remove the packets on the Rx queue. */
epic_rx(dev);
epic_rx(dev, RX_RING_SIZE);
}
static void epic_restart(struct net_device *dev)
......@@ -841,9 +896,9 @@ static void epic_restart(struct net_device *dev)
/* Enable interrupts by setting the interrupt mask. */
outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
| CntFull | TxUnderrun | TxDone | TxEmpty
| RxError | RxOverflow | RxFull | RxHeader | RxDone,
ioaddr + INTMASK);
| CntFull | TxUnderrun
| RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
printk(KERN_DEBUG "%s: epic_restart() done, cmd status %4.4x, ctl %4.4x"
" interrupt %4.4x.\n",
dev->name, (int)inl(ioaddr + COMMAND), (int)inl(ioaddr + GENCTL),
......@@ -929,7 +984,6 @@ static void epic_init_ring(struct net_device *dev)
int i;
ep->tx_full = 0;
ep->lock = (spinlock_t) SPIN_LOCK_UNLOCKED;
ep->dirty_tx = ep->cur_tx = 0;
ep->cur_rx = ep->dirty_rx = 0;
ep->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
......@@ -1029,6 +1083,76 @@ static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev)
return 0;
}
static void epic_tx_error(struct net_device *dev, struct epic_private *ep,
int status)
{
struct net_device_stats *stats = &ep->stats;
#ifndef final_version
/* There was an major error, log it. */
if (debug > 1)
printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
dev->name, status);
#endif
stats->tx_errors++;
if (status & 0x1050)
stats->tx_aborted_errors++;
if (status & 0x0008)
stats->tx_carrier_errors++;
if (status & 0x0040)
stats->tx_window_errors++;
if (status & 0x0010)
stats->tx_fifo_errors++;
}
static void epic_tx(struct net_device *dev, struct epic_private *ep)
{
unsigned int dirty_tx, cur_tx;
/*
* Note: if this lock becomes a problem we can narrow the locked
* region at the cost of occasionally grabbing the lock more times.
*/
cur_tx = ep->cur_tx;
for (dirty_tx = ep->dirty_tx; cur_tx - dirty_tx > 0; dirty_tx++) {
struct sk_buff *skb;
int entry = dirty_tx % TX_RING_SIZE;
int txstatus = le32_to_cpu(ep->tx_ring[entry].txstatus);
if (txstatus & DescOwn)
break; /* It still hasn't been Txed */
if (likely(txstatus & 0x0001)) {
ep->stats.collisions += (txstatus >> 8) & 15;
ep->stats.tx_packets++;
ep->stats.tx_bytes += ep->tx_skbuff[entry]->len;
} else
epic_tx_error(dev, ep, txstatus);
/* Free the original skb. */
skb = ep->tx_skbuff[entry];
pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr,
skb->len, PCI_DMA_TODEVICE);
dev_kfree_skb_irq(skb);
ep->tx_skbuff[entry] = 0;
}
#ifndef final_version
if (cur_tx - dirty_tx > TX_RING_SIZE) {
printk(KERN_WARNING
"%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
dev->name, dirty_tx, cur_tx, ep->tx_full);
dirty_tx += TX_RING_SIZE;
}
#endif
ep->dirty_tx = dirty_tx;
if (ep->tx_full && cur_tx - dirty_tx < TX_QUEUE_LEN - 4) {
/* The ring is no longer full, allow new TX entries. */
ep->tx_full = 0;
netif_wake_queue(dev);
}
}
/* The interrupt handler does all of the Rx thread work and cleans up
after the Tx thread. */
static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
......@@ -1042,7 +1166,7 @@ static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *r
do {
status = inl(ioaddr + INTSTAT);
/* Acknowledge all of the current interrupt sources ASAP. */
outl(status & 0x00007fff, ioaddr + INTSTAT);
outl(status & EpicNormalEvent, ioaddr + INTSTAT);
if (debug > 4)
printk(KERN_DEBUG "%s: Interrupt, status=%#8.8x new "
......@@ -1053,74 +1177,21 @@ static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *r
break;
handled = 1;
if (status & (RxDone | RxStarted | RxEarlyWarn | RxOverflow))
epic_rx(dev);
if (status & (TxEmpty | TxDone)) {
unsigned int dirty_tx, cur_tx;
/* Note: if this lock becomes a problem we can narrow the locked
region at the cost of occasionally grabbing the lock more
times. */
spin_lock(&ep->lock);
cur_tx = ep->cur_tx;
dirty_tx = ep->dirty_tx;
for (; cur_tx - dirty_tx > 0; dirty_tx++) {
struct sk_buff *skb;
int entry = dirty_tx % TX_RING_SIZE;
int txstatus = le32_to_cpu(ep->tx_ring[entry].txstatus);
if (txstatus & DescOwn)
break; /* It still hasn't been Txed */
if ( ! (txstatus & 0x0001)) {
/* There was an major error, log it. */
#ifndef final_version
if (debug > 1)
printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
dev->name, txstatus);
#endif
ep->stats.tx_errors++;
if (txstatus & 0x1050) ep->stats.tx_aborted_errors++;
if (txstatus & 0x0008) ep->stats.tx_carrier_errors++;
if (txstatus & 0x0040) ep->stats.tx_window_errors++;
if (txstatus & 0x0010) ep->stats.tx_fifo_errors++;
} else {
ep->stats.collisions += (txstatus >> 8) & 15;
ep->stats.tx_packets++;
ep->stats.tx_bytes += ep->tx_skbuff[entry]->len;
}
/* Free the original skb. */
skb = ep->tx_skbuff[entry];
pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr,
skb->len, PCI_DMA_TODEVICE);
dev_kfree_skb_irq(skb);
ep->tx_skbuff[entry] = 0;
}
#ifndef final_version
if (cur_tx - dirty_tx > TX_RING_SIZE) {
printk(KERN_WARNING "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
dev->name, dirty_tx, cur_tx, ep->tx_full);
dirty_tx += TX_RING_SIZE;
}
#endif
ep->dirty_tx = dirty_tx;
if (ep->tx_full
&& cur_tx - dirty_tx < TX_QUEUE_LEN - 4) {
/* The ring is no longer full, allow new TX entries. */
ep->tx_full = 0;
spin_unlock(&ep->lock);
netif_wake_queue(dev);
if ((status & EpicNapiEvent) && !ep->reschedule_in_poll) {
spin_lock(&ep->napi_lock);
if (netif_rx_schedule_prep(dev)) {
epic_napi_irq_off(dev, ep);
__netif_rx_schedule(dev);
} else
spin_unlock(&ep->lock);
ep->reschedule_in_poll++;
spin_unlock(&ep->napi_lock);
}
status &= ~EpicNapiEvent;
/* Check uncommon events all at once. */
if (status & (CntFull | TxUnderrun | RxOverflow | RxFull |
PCIBusErr170 | PCIBusErr175)) {
if (status == 0xffffffff) /* Chip failed or removed (CardBus). */
if (status &
(CntFull | TxUnderrun | PCIBusErr170 | PCIBusErr175)) {
if (status == EpicRemoved)
break;
/* Always update the error counts to avoid overhead later. */
ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
......@@ -1133,11 +1204,6 @@ static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *r
/* Restart the transmit process. */
outl(RestartTx, ioaddr + COMMAND);
}
if (status & RxOverflow) { /* Missed a Rx frame. */
ep->stats.rx_errors++;
}
if (status & (RxOverflow | RxFull))
outw(RxQueued, ioaddr + COMMAND);
if (status & PCIBusErr170) {
printk(KERN_ERR "%s: PCI Bus Error! EPIC status %4.4x.\n",
dev->name, status);
......@@ -1147,6 +1213,8 @@ static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *r
/* Clear all error sources. */
outl(status & 0x7f18, ioaddr + INTSTAT);
}
if (!(status & EpicNormalEvent))
break;
if (--boguscnt < 0) {
printk(KERN_ERR "%s: Too much work at interrupt, "
"IntrStatus=0x%8.8x.\n",
......@@ -1164,7 +1232,7 @@ static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *r
return IRQ_RETVAL(handled);
}
static int epic_rx(struct net_device *dev)
static int epic_rx(struct net_device *dev, int budget)
{
struct epic_private *ep = dev->priv;
int entry = ep->cur_rx % RX_RING_SIZE;
......@@ -1174,6 +1242,10 @@ static int epic_rx(struct net_device *dev)
if (debug > 4)
printk(KERN_DEBUG " In epic_rx(), entry %d %8.8x.\n", entry,
ep->rx_ring[entry].rxstatus);
if (rx_work_limit > budget)
rx_work_limit = budget;
/* If we own the next entry, it's a new packet. Send it up. */
while ((ep->rx_ring[entry].rxstatus & cpu_to_le32(DescOwn)) == 0) {
int status = le32_to_cpu(ep->rx_ring[entry].rxstatus);
......@@ -1234,7 +1306,7 @@ static int epic_rx(struct net_device *dev)
ep->rx_skbuff[entry] = NULL;
}
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
netif_receive_skb(skb);
dev->last_rx = jiffies;
ep->stats.rx_packets++;
ep->stats.rx_bytes += pkt_len;
......@@ -1262,6 +1334,61 @@ static int epic_rx(struct net_device *dev)
return work_done;
}
static void epic_rx_err(struct net_device *dev, struct epic_private *ep)
{
long ioaddr = dev->base_addr;
int status;
status = inl(ioaddr + INTSTAT);
if (status == EpicRemoved)
return;
if (status & RxOverflow) /* Missed a Rx frame. */
ep->stats.rx_errors++;
if (status & (RxOverflow | RxFull))
outw(RxQueued, ioaddr + COMMAND);
}
static int epic_poll(struct net_device *dev, int *budget)
{
struct epic_private *ep = dev->priv;
int work_done, orig_budget;
long ioaddr = dev->base_addr;
orig_budget = (*budget > dev->quota) ? dev->quota : *budget;
rx_action:
epic_tx(dev, ep);
work_done = epic_rx(dev, *budget);
epic_rx_err(dev, ep);
*budget -= work_done;
dev->quota -= work_done;
if (netif_running(dev) && (work_done < orig_budget)) {
unsigned long flags;
spin_lock_irqsave(&ep->napi_lock, flags);
if (ep->reschedule_in_poll) {
ep->reschedule_in_poll--;
spin_unlock_irqrestore(&ep->napi_lock, flags);
goto rx_action;
}
outl(EpicNapiEvent, ioaddr + INTSTAT);
epic_napi_irq_on(dev, ep);
__netif_rx_complete(dev);
spin_unlock_irqrestore(&ep->napi_lock, flags);
}
return (work_done >= orig_budget);
}
static int epic_close(struct net_device *dev)
{
long ioaddr = dev->base_addr;
......@@ -1276,9 +1403,13 @@ static int epic_close(struct net_device *dev)
dev->name, (int)inl(ioaddr + INTSTAT));
del_timer_sync(&ep->timer);
epic_pause(dev);
epic_disable_int(dev, ep);
free_irq(dev->irq, dev);
epic_pause(dev);
/* Free all the skbuffs in the Rx queue. */
for (i = 0; i < RX_RING_SIZE; i++) {
skb = ep->rx_skbuff[i];
......@@ -1476,6 +1607,7 @@ static void __devexit epic_remove_one (struct pci_dev *pdev)
#endif
pci_release_regions(pdev);
free_netdev(dev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
/* pci_power_off(pdev, -1); */
}
......
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