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path: root/drivers/pci/pcie/portdrv_pci.c
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Diffstat (limited to 'drivers/pci/pcie/portdrv_pci.c')
-rw-r--r--drivers/pci/pcie/portdrv_pci.c61
1 files changed, 9 insertions, 52 deletions
diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index fb1c1bb87316..973f1b80a038 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -1,9 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * File: portdrv_pci.c
* Purpose: PCI Express Port Bus Driver
* Author: Tom Nguyen <tom.l.nguyen@intel.com>
- * Version: v1.0
*
* Copyright (C) 2004 Intel
* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
@@ -15,10 +13,8 @@
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/init.h>
-#include <linux/pcieport_if.h>
#include <linux/aer.h>
#include <linux/dmi.h>
-#include <linux/pci-aspm.h>
#include "../pci.h"
#include "portdrv.h"
@@ -27,22 +23,18 @@
bool pcie_ports_disabled;
/*
- * If this switch is set, ACPI _OSC will be used to determine whether or not to
- * enable PCIe port native services.
+ * If the user specified "pcie_ports=native", use the PCIe services regardless
+ * of whether the platform has given us permission. On ACPI systems, this
+ * means we ignore _OSC.
*/
-bool pcie_ports_auto = true;
+bool pcie_ports_native;
static int __init pcie_port_setup(char *str)
{
- if (!strncmp(str, "compat", 6)) {
+ if (!strncmp(str, "compat", 6))
pcie_ports_disabled = true;
- } else if (!strncmp(str, "native", 6)) {
- pcie_ports_disabled = false;
- pcie_ports_auto = false;
- } else if (!strncmp(str, "auto", 4)) {
- pcie_ports_disabled = false;
- pcie_ports_auto = true;
- }
+ else if (!strncmp(str, "native", 6))
+ pcie_ports_native = true;
return 1;
}
@@ -50,15 +42,6 @@ __setup("pcie_ports=", pcie_port_setup);
/* global data */
-/**
- * pcie_clear_root_pme_status - Clear root port PME interrupt status.
- * @dev: PCIe root port or event collector.
- */
-void pcie_clear_root_pme_status(struct pci_dev *dev)
-{
- pcie_capability_set_dword(dev, PCI_EXP_RTSTA, PCI_EXP_RTSTA_PME);
-}
-
static int pcie_portdrv_restore_config(struct pci_dev *dev)
{
int retval;
@@ -71,20 +54,6 @@ static int pcie_portdrv_restore_config(struct pci_dev *dev)
}
#ifdef CONFIG_PM
-static int pcie_port_resume_noirq(struct device *dev)
-{
- struct pci_dev *pdev = to_pci_dev(dev);
-
- /*
- * Some BIOSes forget to clear Root PME Status bits after system wakeup
- * which breaks ACPI-based runtime wakeup on PCI Express, so clear those
- * bits now just in case (shouldn't hurt).
- */
- if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT)
- pcie_clear_root_pme_status(pdev);
- return 0;
-}
-
static int pcie_port_runtime_suspend(struct device *dev)
{
return to_pci_dev(dev)->bridge_d3 ? 0 : -EBUSY;
@@ -112,7 +81,6 @@ static const struct dev_pm_ops pcie_portdrv_pm_ops = {
.thaw = pcie_port_device_resume,
.poweroff = pcie_port_device_suspend,
.restore = pcie_port_device_resume,
- .resume_noirq = pcie_port_resume_noirq,
.runtime_suspend = pcie_port_runtime_suspend,
.runtime_resume = pcie_port_runtime_resume,
.runtime_idle = pcie_port_runtime_idle,
@@ -283,22 +251,11 @@ static const struct dmi_system_id pcie_portdrv_dmi_table[] __initconst = {
static int __init pcie_portdrv_init(void)
{
- int retval;
-
if (pcie_ports_disabled)
- return pci_register_driver(&pcie_portdriver);
+ return -EACCES;
dmi_check_system(pcie_portdrv_dmi_table);
- retval = pcie_port_bus_register();
- if (retval) {
- printk(KERN_WARNING "PCIE: bus_register error: %d\n", retval);
- goto out;
- }
- retval = pci_register_driver(&pcie_portdriver);
- if (retval)
- pcie_port_bus_unregister();
- out:
- return retval;
+ return pci_register_driver(&pcie_portdriver);
}
device_initcall(pcie_portdrv_init);