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Date: Fri, 18 Jun 2010 13:05:29 -0700
From: Dimitris Michailidis <dm@...lsio.com>
To: netdev@...r.kernel.org
Cc: Dimitris Michailidis <dm@...lsio.com>
Subject: [PATCH net-next 3/9] cxgb4: implement EEH
Implement the pci_error_handlers methods for EEH.
Signed-off-by: Dimitris Michailidis <dm@...lsio.com>
---
drivers/net/cxgb4/cxgb4.h | 1 +
drivers/net/cxgb4/cxgb4_main.c | 108 +++++++++++++++++++++++++++++++++++++++-
drivers/net/cxgb4/l2t.c | 7 +++
drivers/net/cxgb4/t4_hw.c | 11 +++-
4 files changed, 124 insertions(+), 3 deletions(-)
diff --git a/drivers/net/cxgb4/cxgb4.h b/drivers/net/cxgb4/cxgb4.h
index bfa1366..5e37c1e 100644
--- a/drivers/net/cxgb4/cxgb4.h
+++ b/drivers/net/cxgb4/cxgb4.h
@@ -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);
diff --git a/drivers/net/cxgb4/cxgb4_main.c b/drivers/net/cxgb4/cxgb4_main.c
index 60f6ea0..baf4f0a 100644
--- a/drivers/net/cxgb4/cxgb4_main.c
+++ b/drivers/net/cxgb4/cxgb4_main.c
@@ -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)
diff --git a/drivers/net/cxgb4/l2t.c b/drivers/net/cxgb4/l2t.c
index 9f96724..5b990d2 100644
--- a/drivers/net/cxgb4/l2t.c
+++ b/drivers/net/cxgb4/l2t.c
@@ -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);
diff --git a/drivers/net/cxgb4/t4_hw.c b/drivers/net/cxgb4/t4_hw.c
index 5c81c55..0c8a84a 100644
--- a/drivers/net/cxgb4/t4_hw.c
+++ b/drivers/net/cxgb4/t4_hw.c
@@ -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;
--
1.5.4
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