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cxgb4: implement EEH

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Implement the pci_error_handlers methods for EEH.

Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dimitris Michailidis 2010-06-18 10:05:29 +00:00 committed by David S. Miller
parent 02b5fb8e14
commit 204dc3c0b1
4 changed files with 124 additions and 3 deletions
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1
drivers/net/cxgb4/cxgb4.h
View file

@ -650,6 +650,7 @@ void t4_intr_disable(struct adapter *adapter);
void t4_intr_clear(struct adapter *adapter);
int t4_slow_intr_handler(struct adapter *adapter);
int t4_wait_dev_ready(struct adapter *adap);
int t4_link_start(struct adapter *adap, unsigned int mbox, unsigned int port,
struct link_config *lc);
int t4_restart_aneg(struct adapter *adap, unsigned int mbox, unsigned int port);

108
drivers/net/cxgb4/cxgb4_main.c
View file

@ -2483,6 +2483,7 @@ static void cxgb_down(struct adapter *adapter)
t4_intr_disable(adapter);
cancel_work_sync(&adapter->tid_release_task);
adapter->tid_release_task_busy = false;
adapter->tid_release_head = NULL;
if (adapter->flags & USING_MSIX) {
free_msix_queue_irqs(adapter);
@ -2907,6 +2908,108 @@ bye: if (ret != -ETIMEDOUT && ret != -EIO)
return ret;
}
/* EEH callbacks */
static pci_ers_result_t eeh_err_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
int i;
struct adapter *adap = pci_get_drvdata(pdev);
if (!adap)
goto out;
rtnl_lock();
adap->flags &= ~FW_OK;
notify_ulds(adap, CXGB4_STATE_START_RECOVERY);
for_each_port(adap, i) {
struct net_device *dev = adap->port[i];
netif_device_detach(dev);
netif_carrier_off(dev);
}
if (adap->flags & FULL_INIT_DONE)
cxgb_down(adap);
rtnl_unlock();
pci_disable_device(pdev);
out: return state == pci_channel_io_perm_failure ?
PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
}
static pci_ers_result_t eeh_slot_reset(struct pci_dev *pdev)
{
int i, ret;
struct fw_caps_config_cmd c;
struct adapter *adap = pci_get_drvdata(pdev);
if (!adap) {
pci_restore_state(pdev);
pci_save_state(pdev);
return PCI_ERS_RESULT_RECOVERED;
}
if (pci_enable_device(pdev)) {
dev_err(&pdev->dev, "cannot reenable PCI device after reset\n");
return PCI_ERS_RESULT_DISCONNECT;
}
pci_set_master(pdev);
pci_restore_state(pdev);
pci_save_state(pdev);
pci_cleanup_aer_uncorrect_error_status(pdev);
if (t4_wait_dev_ready(adap) < 0)
return PCI_ERS_RESULT_DISCONNECT;
if (t4_fw_hello(adap, 0, 0, MASTER_MUST, NULL))
return PCI_ERS_RESULT_DISCONNECT;
adap->flags |= FW_OK;
if (adap_init1(adap, &c))
return PCI_ERS_RESULT_DISCONNECT;
for_each_port(adap, i) {
struct port_info *p = adap2pinfo(adap, i);
ret = t4_alloc_vi(adap, 0, p->tx_chan, 0, 0, 1, NULL, NULL);
if (ret < 0)
return PCI_ERS_RESULT_DISCONNECT;
p->viid = ret;
p->xact_addr_filt = -1;
}
t4_load_mtus(adap, adap->params.mtus, adap->params.a_wnd,
adap->params.b_wnd);
if (cxgb_up(adap))
return PCI_ERS_RESULT_DISCONNECT;
return PCI_ERS_RESULT_RECOVERED;
}
static void eeh_resume(struct pci_dev *pdev)
{
int i;
struct adapter *adap = pci_get_drvdata(pdev);
if (!adap)
return;
rtnl_lock();
for_each_port(adap, i) {
struct net_device *dev = adap->port[i];
if (netif_running(dev)) {
link_start(dev);
cxgb_set_rxmode(dev);
}
netif_device_attach(dev);
}
rtnl_unlock();
}
static struct pci_error_handlers cxgb4_eeh = {
.error_detected = eeh_err_detected,
.slot_reset = eeh_slot_reset,
.resume = eeh_resume,
};
static inline bool is_10g_port(const struct link_config *lc)
{
return (lc->supported & FW_PORT_CAP_SPEED_10G) != 0;
@ -3154,8 +3257,10 @@ static int __devinit init_one(struct pci_dev *pdev,
/* We control everything through PF 0 */
func = PCI_FUNC(pdev->devfn);
if (func > 0)
if (func > 0) {
pci_save_state(pdev); /* to restore SR-IOV later */
goto sriov;
}
err = pci_enable_device(pdev);
if (err) {
@ -3396,6 +3501,7 @@ static struct pci_driver cxgb4_driver = {
.id_table = cxgb4_pci_tbl,
.probe = init_one,
.remove = __devexit_p(remove_one),
.err_handler = &cxgb4_eeh,
};
static int __init cxgb4_init_module(void)

7
drivers/net/cxgb4/l2t.c
View file

@ -310,6 +310,13 @@ static void t4_l2e_free(struct l2t_entry *e)
neigh_release(e->neigh);
e->neigh = NULL;
}
while (e->arpq_head) {
struct sk_buff *skb = e->arpq_head;
e->arpq_head = skb->next;
kfree(skb);
}
e->arpq_tail = NULL;
}
spin_unlock_bh(&e->lock);

11
drivers/net/cxgb4/t4_hw.c
View file

@ -221,6 +221,13 @@ int t4_wr_mbox_meat(struct adapter *adap, int mbox, const void *cmd, int size,
if ((size & 15) || size > MBOX_LEN)
return -EINVAL;
/*
* If the device is off-line, as in EEH, commands will time out.
* Fail them early so we don't waste time waiting.
*/
if (adap->pdev->error_state != pci_channel_io_normal)
return -EIO;
v = MBOWNER_GET(t4_read_reg(adap, ctl_reg));
for (i = 0; v == MBOX_OWNER_NONE && i < 3; i++)
v = MBOWNER_GET(t4_read_reg(adap, ctl_reg));
@ -3045,7 +3052,7 @@ static void __devinit init_link_config(struct link_config *lc,
}
}
static int __devinit wait_dev_ready(struct adapter *adap)
int t4_wait_dev_ready(struct adapter *adap)
{
if (t4_read_reg(adap, PL_WHOAMI) != 0xffffffff)
return 0;
@ -3093,7 +3100,7 @@ int __devinit t4_prep_adapter(struct adapter *adapter)
{
int ret;
ret = wait_dev_ready(adapter);
ret = t4_wait_dev_ready(adapter);
if (ret < 0)
return ret;