linux/drivers/pci/pcie/edr.c

// SPDX-License-Identifier: GPL-2.0
/*
 * PCI Error Disconnect Recover support
 * Author: Kuppuswamy Sathyanarayanan <[email protected]>
 *
 * Copyright (C) 2020 Intel Corp.
 */

#define dev_fmt(fmt) …

#include <linux/pci.h>
#include <linux/pci-acpi.h>

#include "portdrv.h"
#include "../pci.h"

#define EDR_PORT_DPC_ENABLE_DSM …
#define EDR_PORT_LOCATE_DSM …
#define EDR_OST_SUCCESS …
#define EDR_OST_FAILED …

/*
 * _DSM wrapper function to enable/disable DPC
 * @pdev   : PCI device structure
 *
 * returns 0 on success or errno on failure.
 */
static int acpi_enable_dpc(struct pci_dev *pdev)
{ … }

/*
 * _DSM wrapper function to locate DPC port
 * @pdev   : Device which received EDR event
 *
 * Returns pci_dev or NULL.  Caller is responsible for dropping a reference
 * on the returned pci_dev with pci_dev_put().
 */
static struct pci_dev *acpi_dpc_port_get(struct pci_dev *pdev)
{ … }

/*
 * _OST wrapper function to let firmware know the status of EDR event
 * @pdev   : Device used to send _OST
 * @edev   : Device which experienced EDR event
 * @status : Status of EDR event
 */
static int acpi_send_edr_status(struct pci_dev *pdev, struct pci_dev *edev,
				u16 status)
{ … }

static void edr_handle_event(acpi_handle handle, u32 event, void *data)
{ … }

void pci_acpi_add_edr_notifier(struct pci_dev *pdev)
{ … }

void pci_acpi_remove_edr_notifier(struct pci_dev *pdev)
{ … }