Commit 96a766a7 authored by Manish Rangankar's avatar Manish Rangankar Committed by Martin K. Petersen
Browse files

scsi: qedi: Add support for handling PCIe errors 

The error recovery is handled by management firmware (MFW) with the help of
qed/qedi drivers. Upon detecting errors, driver informs MFW about this
event which in turn starts a recovery process. MFW sends ERROR_RECOVERY
notification to the driver which performs the required cleanup/recovery
from the driver side.

Link: https://lore.kernel.org/r/20200908095657.26821-9-mrangankar@marvell.com


Signed-off-by: default avatarManish Rangankar <mrangankar@marvell.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent f4ba4e55

drivers/scsi/qedi/qedi_main.c

+24 −0
Original line number Diff line number Diff line
@@ -2390,6 +2390,25 @@ static int qedi_setup_boot_info(struct qedi_ctx *qedi) 
	return -ENOMEM;

}



static pci_ers_result_t qedi_io_error_detected(struct pci_dev *pdev,

					       pci_channel_state_t state)

{

	struct qedi_ctx *qedi = pci_get_drvdata(pdev);



	QEDI_ERR(&qedi->dbg_ctx, "%s: PCI error detected [%d]\n",

		 __func__, state);



	if (test_and_set_bit(QEDI_IN_RECOVERY, &qedi->flags)) {

		QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,

			  "Recovery already in progress.\n");

		return PCI_ERS_RESULT_NONE;

	}



	qedi_ops->common->recovery_process(qedi->cdev);



	return PCI_ERS_RESULT_CAN_RECOVER;

}



static void __qedi_remove(struct pci_dev *pdev, int mode)

{

	struct qedi_ctx *qedi = pci_get_drvdata(pdev);
@@ -2819,12 +2838,17 @@ MODULE_DEVICE_TABLE(pci, qedi_pci_tbl); 


static enum cpuhp_state qedi_cpuhp_state;



static struct pci_error_handlers qedi_err_handler = {

	.error_detected = qedi_io_error_detected,

};



static struct pci_driver qedi_pci_driver = {

	.name = QEDI_MODULE_NAME,

	.id_table = qedi_pci_tbl,

	.probe = qedi_probe,

	.remove = qedi_remove,

	.shutdown = qedi_shutdown,

	.err_handler = &qedi_err_handler,

};



static int __init qedi_init(void)