Commit 204dc3c0 authored by Dimitris Michailidis's avatar Dimitris Michailidis Committed by David S. Miller
Browse files

cxgb4: implement EEH 



Implement the pci_error_handlers methods for EEH.

Signed-off-by: default avatarDimitris Michailidis <dm@chelsio.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 02b5fb8e

drivers/net/cxgb4/cxgb4.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

drivers/net/cxgb4/cxgb4_main.c

+107 −1
Original line number Diff line number Diff line
@@ -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)

drivers/net/cxgb4/l2t.c

+7 −0
Original line number Diff line number Diff line
@@ -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);

drivers/net/cxgb4/t4_hw.c

+9 −2
Original line number Diff line number Diff line
@@ -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;