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s2io: add PCI error recovery support

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This patch adds PCI error recovery support to the
s2io 10-Gigabit ethernet device driver. Third revision,
blocks interrupts and the watchdog.

Tested, seems to work well.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Acked-by: Ramkrishna Vepa <Ramkrishna.Vepa@neterion.com>
Cc: Raghavendra Koushik <raghavendra.koushik@neterion.com>
Cc: Wen Xiong <wenxiong@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Linas Vepstas 2007-05-14 18:37:30 -05:00 committed by Jeff Garzik
parent bd5824f138
commit d796fdb708
2 changed files with 116 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

116
drivers/net/s2io.c
View file

@ -469,11 +469,18 @@ static struct pci_device_id s2io_tbl[] __devinitdata = {
MODULE_DEVICE_TABLE(pci, s2io_tbl);
static struct pci_error_handlers s2io_err_handler = {
.error_detected = s2io_io_error_detected,
.slot_reset = s2io_io_slot_reset,
.resume = s2io_io_resume,
};
static struct pci_driver s2io_driver = {
.name = "S2IO",
.id_table = s2io_tbl,
.probe = s2io_init_nic,
.remove = __devexit_p(s2io_rem_nic),
.err_handler = &s2io_err_handler,
};
/* A simplifier macro used both by init and free shared_mem Fns(). */
@ -2689,6 +2696,9 @@ static void s2io_netpoll(struct net_device *dev)
u64 val64 = 0xFFFFFFFFFFFFFFFFULL;
int i;
if (pci_channel_offline(nic->pdev))
return;
disable_irq(dev->irq);
atomic_inc(&nic->isr_cnt);
@ -3215,6 +3225,8 @@ static void alarm_intr_handler(struct s2io_nic *nic)
int i;
if (atomic_read(&nic->card_state) == CARD_DOWN)
return;
if (pci_channel_offline(nic->pdev))
return;
nic->mac_control.stats_info->sw_stat.ring_full_cnt = 0;
/* Handling the XPAK counters update */
if(nic->mac_control.stats_info->xpak_stat.xpak_timer_count < 72000) {
@ -4314,6 +4326,10 @@ static irqreturn_t s2io_isr(int irq, void *dev_id)
struct mac_info *mac_control;
struct config_param *config;
/* Pretend we handled any irq's from a disconnected card */
if (pci_channel_offline(sp->pdev))
return IRQ_NONE;
atomic_inc(&sp->isr_cnt);
mac_control = &sp->mac_control;
config = &sp->config;
@ -6569,7 +6585,7 @@ static void s2io_rem_isr(struct s2io_nic * sp)
} while(cnt < 5);
}
static void s2io_card_down(struct s2io_nic * sp)
static void do_s2io_card_down(struct s2io_nic * sp, int do_io)
{
int cnt = 0;
struct XENA_dev_config __iomem *bar0 = sp->bar0;
@ -6584,7 +6600,8 @@ static void s2io_card_down(struct s2io_nic * sp)
atomic_set(&sp->card_state, CARD_DOWN);
/* disable Tx and Rx traffic on the NIC */
stop_nic(sp);
if (do_io)
stop_nic(sp);
s2io_rem_isr(sp);
@ -6592,7 +6609,7 @@ static void s2io_card_down(struct s2io_nic * sp)
tasklet_kill(&sp->task);
/* Check if the device is Quiescent and then Reset the NIC */
do {
while(do_io) {
/* As per the HW requirement we need to replenish the
* receive buffer to avoid the ring bump. Since there is
* no intention of processing the Rx frame at this pointwe are
@ -6617,8 +6634,9 @@ static void s2io_card_down(struct s2io_nic * sp)
(unsigned long long) val64);
break;
}
} while (1);
s2io_reset(sp);
}
if (do_io)
s2io_reset(sp);
spin_lock_irqsave(&sp->tx_lock, flags);
/* Free all Tx buffers */
@ -6633,6 +6651,11 @@ static void s2io_card_down(struct s2io_nic * sp)
clear_bit(0, &(sp->link_state));
}
static void s2io_card_down(struct s2io_nic * sp)
{
do_s2io_card_down(sp, 1);
}
static int s2io_card_up(struct s2io_nic * sp)
{
int i, ret = 0;
@ -8010,3 +8033,86 @@ static void lro_append_pkt(struct s2io_nic *sp, struct lro *lro,
sp->mac_control.stats_info->sw_stat.clubbed_frms_cnt++;
return;
}
/**
* s2io_io_error_detected - called when PCI error is detected
* @pdev: Pointer to PCI device
* @state: The current pci conneection state
*
* This function is called after a PCI bus error affecting
* this device has been detected.
*/
static pci_ers_result_t s2io_io_error_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct s2io_nic *sp = netdev->priv;
netif_device_detach(netdev);
if (netif_running(netdev)) {
/* Bring down the card, while avoiding PCI I/O */
do_s2io_card_down(sp, 0);
sp->device_close_flag = TRUE; /* Device is shut down. */
}
pci_disable_device(pdev);
return PCI_ERS_RESULT_NEED_RESET;
}
/**
* s2io_io_slot_reset - called after the pci bus has been reset.
* @pdev: Pointer to PCI device
*
* Restart the card from scratch, as if from a cold-boot.
* At this point, the card has exprienced a hard reset,
* followed by fixups by BIOS, and has its config space
* set up identically to what it was at cold boot.
*/
static pci_ers_result_t s2io_io_slot_reset(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct s2io_nic *sp = netdev->priv;
if (pci_enable_device(pdev)) {
printk(KERN_ERR "s2io: "
"Cannot re-enable PCI device after reset.\n");
return PCI_ERS_RESULT_DISCONNECT;
}
pci_set_master(pdev);
s2io_reset(sp);
return PCI_ERS_RESULT_RECOVERED;
}
/**
* s2io_io_resume - called when traffic can start flowing again.
* @pdev: Pointer to PCI device
*
* This callback is called when the error recovery driver tells
* us that its OK to resume normal operation.
*/
static void s2io_io_resume(struct pci_dev *pdev)
{
struct net_device *netdev = pci_get_drvdata(pdev);
struct s2io_nic *sp = netdev->priv;
if (netif_running(netdev)) {
if (s2io_card_up(sp)) {
printk(KERN_ERR "s2io: "
"Can't bring device back up after reset.\n");
return;
}
if (s2io_set_mac_addr(netdev, netdev->dev_addr) == FAILURE) {
s2io_card_down(sp);
printk(KERN_ERR "s2io: "
"Can't resetore mac addr after reset.\n");
return;
}
}
netif_device_attach(netdev);
netif_wake_queue(netdev);
}

5
drivers/net/s2io.h
View file

@ -1052,6 +1052,11 @@ static void lro_append_pkt(struct s2io_nic *sp, struct lro *lro,
struct sk_buff *skb, u32 tcp_len);
static int rts_ds_steer(struct s2io_nic *nic, u8 ds_codepoint, u8 ring);
static pci_ers_result_t s2io_io_error_detected(struct pci_dev *pdev,
pci_channel_state_t state);
static pci_ers_result_t s2io_io_slot_reset(struct pci_dev *pdev);
static void s2io_io_resume(struct pci_dev *pdev);
#define s2io_tcp_mss(skb) skb_shinfo(skb)->gso_size
#define s2io_udp_mss(skb) skb_shinfo(skb)->gso_size
#define s2io_offload_type(skb) skb_shinfo(skb)->gso_type