forked from Minki/linux
cxgb4: implement EEH
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>
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02b5fb8e14
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204dc3c0b1
@ -650,6 +650,7 @@ void t4_intr_disable(struct adapter *adapter);
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void t4_intr_clear(struct adapter *adapter);
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int t4_slow_intr_handler(struct adapter *adapter);
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int t4_wait_dev_ready(struct adapter *adap);
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int t4_link_start(struct adapter *adap, unsigned int mbox, unsigned int port,
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struct link_config *lc);
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int t4_restart_aneg(struct adapter *adap, unsigned int mbox, unsigned int port);
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@ -2483,6 +2483,7 @@ static void cxgb_down(struct adapter *adapter)
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t4_intr_disable(adapter);
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cancel_work_sync(&adapter->tid_release_task);
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adapter->tid_release_task_busy = false;
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adapter->tid_release_head = NULL;
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if (adapter->flags & USING_MSIX) {
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free_msix_queue_irqs(adapter);
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@ -2907,6 +2908,108 @@ bye: if (ret != -ETIMEDOUT && ret != -EIO)
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return ret;
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}
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/* EEH callbacks */
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static pci_ers_result_t eeh_err_detected(struct pci_dev *pdev,
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pci_channel_state_t state)
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{
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int i;
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struct adapter *adap = pci_get_drvdata(pdev);
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if (!adap)
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goto out;
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rtnl_lock();
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adap->flags &= ~FW_OK;
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notify_ulds(adap, CXGB4_STATE_START_RECOVERY);
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for_each_port(adap, i) {
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struct net_device *dev = adap->port[i];
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netif_device_detach(dev);
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netif_carrier_off(dev);
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}
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if (adap->flags & FULL_INIT_DONE)
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cxgb_down(adap);
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rtnl_unlock();
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pci_disable_device(pdev);
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out: return state == pci_channel_io_perm_failure ?
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PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
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}
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static pci_ers_result_t eeh_slot_reset(struct pci_dev *pdev)
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{
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int i, ret;
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struct fw_caps_config_cmd c;
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struct adapter *adap = pci_get_drvdata(pdev);
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if (!adap) {
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pci_restore_state(pdev);
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pci_save_state(pdev);
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return PCI_ERS_RESULT_RECOVERED;
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}
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if (pci_enable_device(pdev)) {
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dev_err(&pdev->dev, "cannot reenable PCI device after reset\n");
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return PCI_ERS_RESULT_DISCONNECT;
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}
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pci_set_master(pdev);
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pci_restore_state(pdev);
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pci_save_state(pdev);
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pci_cleanup_aer_uncorrect_error_status(pdev);
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if (t4_wait_dev_ready(adap) < 0)
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return PCI_ERS_RESULT_DISCONNECT;
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if (t4_fw_hello(adap, 0, 0, MASTER_MUST, NULL))
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return PCI_ERS_RESULT_DISCONNECT;
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adap->flags |= FW_OK;
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if (adap_init1(adap, &c))
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return PCI_ERS_RESULT_DISCONNECT;
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for_each_port(adap, i) {
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struct port_info *p = adap2pinfo(adap, i);
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ret = t4_alloc_vi(adap, 0, p->tx_chan, 0, 0, 1, NULL, NULL);
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if (ret < 0)
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return PCI_ERS_RESULT_DISCONNECT;
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p->viid = ret;
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p->xact_addr_filt = -1;
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}
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t4_load_mtus(adap, adap->params.mtus, adap->params.a_wnd,
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adap->params.b_wnd);
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if (cxgb_up(adap))
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return PCI_ERS_RESULT_DISCONNECT;
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return PCI_ERS_RESULT_RECOVERED;
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}
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static void eeh_resume(struct pci_dev *pdev)
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{
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int i;
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struct adapter *adap = pci_get_drvdata(pdev);
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if (!adap)
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return;
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rtnl_lock();
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for_each_port(adap, i) {
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struct net_device *dev = adap->port[i];
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if (netif_running(dev)) {
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link_start(dev);
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cxgb_set_rxmode(dev);
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}
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netif_device_attach(dev);
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}
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rtnl_unlock();
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}
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static struct pci_error_handlers cxgb4_eeh = {
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.error_detected = eeh_err_detected,
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.slot_reset = eeh_slot_reset,
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.resume = eeh_resume,
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};
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static inline bool is_10g_port(const struct link_config *lc)
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{
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return (lc->supported & FW_PORT_CAP_SPEED_10G) != 0;
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@ -3154,8 +3257,10 @@ static int __devinit init_one(struct pci_dev *pdev,
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/* We control everything through PF 0 */
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func = PCI_FUNC(pdev->devfn);
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if (func > 0)
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if (func > 0) {
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pci_save_state(pdev); /* to restore SR-IOV later */
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goto sriov;
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}
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err = pci_enable_device(pdev);
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if (err) {
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@ -3396,6 +3501,7 @@ static struct pci_driver cxgb4_driver = {
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.id_table = cxgb4_pci_tbl,
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.probe = init_one,
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.remove = __devexit_p(remove_one),
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.err_handler = &cxgb4_eeh,
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};
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static int __init cxgb4_init_module(void)
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@ -310,6 +310,13 @@ static void t4_l2e_free(struct l2t_entry *e)
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neigh_release(e->neigh);
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e->neigh = NULL;
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}
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while (e->arpq_head) {
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struct sk_buff *skb = e->arpq_head;
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e->arpq_head = skb->next;
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kfree(skb);
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}
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e->arpq_tail = NULL;
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}
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spin_unlock_bh(&e->lock);
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@ -221,6 +221,13 @@ int t4_wr_mbox_meat(struct adapter *adap, int mbox, const void *cmd, int size,
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if ((size & 15) || size > MBOX_LEN)
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return -EINVAL;
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/*
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* If the device is off-line, as in EEH, commands will time out.
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* Fail them early so we don't waste time waiting.
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*/
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if (adap->pdev->error_state != pci_channel_io_normal)
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return -EIO;
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v = MBOWNER_GET(t4_read_reg(adap, ctl_reg));
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for (i = 0; v == MBOX_OWNER_NONE && i < 3; i++)
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v = MBOWNER_GET(t4_read_reg(adap, ctl_reg));
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@ -3045,7 +3052,7 @@ static void __devinit init_link_config(struct link_config *lc,
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}
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}
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static int __devinit wait_dev_ready(struct adapter *adap)
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int t4_wait_dev_ready(struct adapter *adap)
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{
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if (t4_read_reg(adap, PL_WHOAMI) != 0xffffffff)
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return 0;
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@ -3093,7 +3100,7 @@ int __devinit t4_prep_adapter(struct adapter *adapter)
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{
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int ret;
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ret = wait_dev_ready(adapter);
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ret = t4_wait_dev_ready(adapter);
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if (ret < 0)
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return ret;
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