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[PATCH] forcedeth: add recoverable error support 

This patch adds support to recover from a previously fatal MAC error. In
the past the MAC would be hung on an internal fatal error. On new
chipsets, the MAC has the ability to enter a non-fatal state and allow
the driver to re-init it.

Signed-Off-By: Ayaz Abdulla <aabdulla@nvidia.com>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Ayaz Abdulla 2006-10-30 17:32:01 -05:00 committed by Jeff Garzik
parent 7e680c22c0
commit c5cf9101fe
1 changed files with 74 additions and 4 deletions
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78
drivers/net/forcedeth.c
View File

@ -111,6 +111,7 @@
* 0.56: 22 Mar 2006: Additional ethtool config and moduleparam support.
* 0.57: 14 May 2006: Mac address set in probe/remove and order corrections.
* 0.58: 30 Oct 2006: Added support for sideband management unit.
* 0.59: 30 Oct 2006: Added support for recoverable error.
*
* Known bugs:
* We suspect that on some hardware no TX done interrupts are generated.
@ -127,7 +128,7 @@
#else
#define DRIVERNAPI
#endif
#define FORCEDETH_VERSION "0.58"
#define FORCEDETH_VERSION "0.59"
#define DRV_NAME "forcedeth"
#include <linux/module.h>
@ -180,7 +181,7 @@
enum {
NvRegIrqStatus = 0x000,
#define NVREG_IRQSTAT_MIIEVENT 0x040
#define NVREG_IRQSTAT_MASK 0x1ff
#define NVREG_IRQSTAT_MASK 0x81ff
NvRegIrqMask = 0x004,
#define NVREG_IRQ_RX_ERROR 0x0001
#define NVREG_IRQ_RX 0x0002
@ -191,15 +192,16 @@ enum {
#define NVREG_IRQ_LINK 0x0040
#define NVREG_IRQ_RX_FORCED 0x0080
#define NVREG_IRQ_TX_FORCED 0x0100
#define NVREG_IRQ_RECOVER_ERROR 0x8000
#define NVREG_IRQMASK_THROUGHPUT 0x00df
#define NVREG_IRQMASK_CPU 0x0040
#define NVREG_IRQ_TX_ALL (NVREG_IRQ_TX_ERR|NVREG_IRQ_TX_OK|NVREG_IRQ_TX_FORCED)
#define NVREG_IRQ_RX_ALL (NVREG_IRQ_RX_ERROR|NVREG_IRQ_RX|NVREG_IRQ_RX_NOBUF|NVREG_IRQ_RX_FORCED)
#define NVREG_IRQ_OTHER (NVREG_IRQ_TIMER|NVREG_IRQ_LINK)
#define NVREG_IRQ_OTHER (NVREG_IRQ_TIMER|NVREG_IRQ_LINK|NVREG_IRQ_RECOVER_ERROR)
#define NVREG_IRQ_UNKNOWN (~(NVREG_IRQ_RX_ERROR|NVREG_IRQ_RX|NVREG_IRQ_RX_NOBUF|NVREG_IRQ_TX_ERR| \
NVREG_IRQ_TX_OK|NVREG_IRQ_TIMER|NVREG_IRQ_LINK|NVREG_IRQ_RX_FORCED| \
NVREG_IRQ_TX_FORCED))
NVREG_IRQ_TX_FORCED|NVREG_IRQ_RECOVER_ERROR))
NvRegUnknownSetupReg6 = 0x008,
#define NVREG_UNKSETUP6_VAL 3
@ -718,6 +720,7 @@ struct fe_priv {
unsigned int phy_model;
u16 gigabit;
int intr_test;
int recover_error;
/* General data: RO fields */
dma_addr_t ring_addr;
@ -2455,6 +2458,23 @@ static irqreturn_t nv_nic_irq(int foo, void *data)
printk(KERN_DEBUG "%s: received irq with unknown events 0x%x. Please report\n",
dev->name, events);
}
if (unlikely(events & NVREG_IRQ_RECOVER_ERROR)) {
spin_lock(&np->lock);
/* disable interrupts on the nic */
if (!(np->msi_flags & NV_MSI_X_ENABLED))
writel(0, base + NvRegIrqMask);
else
writel(np->irqmask, base + NvRegIrqMask);
pci_push(base);
if (!np->in_shutdown) {
np->nic_poll_irq = np->irqmask;
np->recover_error = 1;
mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
}
spin_unlock(&np->lock);
break;
}
#ifdef CONFIG_FORCEDETH_NAPI
if (events & NVREG_IRQ_RX_ALL) {
netif_rx_schedule(dev);
@ -2685,6 +2705,20 @@ static irqreturn_t nv_nic_irq_other(int foo, void *data)
spin_unlock_irqrestore(&np->lock, flags);
np->link_timeout = jiffies + LINK_TIMEOUT;
}
if (events & NVREG_IRQ_RECOVER_ERROR) {
spin_lock_irq(&np->lock);
/* disable interrupts on the nic */
writel(NVREG_IRQ_OTHER, base + NvRegIrqMask);
pci_push(base);
if (!np->in_shutdown) {
np->nic_poll_irq |= NVREG_IRQ_OTHER;
np->recover_error = 1;
mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
}
spin_unlock_irq(&np->lock);
break;
}
if (events & (NVREG_IRQ_UNKNOWN)) {
printk(KERN_DEBUG "%s: received irq with unknown events 0x%x. Please report\n",
dev->name, events);
@ -2914,6 +2948,42 @@ static void nv_do_nic_poll(unsigned long data)
}
np->nic_poll_irq = 0;
if (np->recover_error) {
np->recover_error = 0;
printk(KERN_INFO "forcedeth: MAC in recoverable error state\n");
if (netif_running(dev)) {
netif_tx_lock_bh(dev);
spin_lock(&np->lock);
/* stop engines */
nv_stop_rx(dev);
nv_stop_tx(dev);
nv_txrx_reset(dev);
/* drain rx queue */
nv_drain_rx(dev);
nv_drain_tx(dev);
/* reinit driver view of the rx queue */
set_bufsize(dev);
if (nv_init_ring(dev)) {
if (!np->in_shutdown)
mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
}
/* reinit nic view of the rx queue */
writel(np->rx_buf_sz, base + NvRegOffloadConfig);
setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
writel( ((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
base + NvRegRingSizes);
pci_push(base);
writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
pci_push(base);
/* restart rx engine */
nv_start_rx(dev);
nv_start_tx(dev);
spin_unlock(&np->lock);
netif_tx_unlock_bh(dev);
}
}
/* FIXME: Do we need synchronize_irq(dev->irq) here? */
writel(mask, base + NvRegIrqMask);