Release 4.7 drivers/pci/pcie/portdrv_pci.c
/*
* File: portdrv_pci.c
* Purpose: PCI Express Port Bus Driver
*
* Copyright (C) 2004 Intel
* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#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 "portdrv.h"
#include "aer/aerdrv.h"
/*
* Version Information
*/
#define DRIVER_VERSION "v1.0"
#define DRIVER_AUTHOR "tom.l.nguyen@intel.com"
#define DRIVER_DESC "PCIe Port Bus Driver"
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/* If this switch is set, PCIe port native services should not be enabled. */
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.
*/
bool pcie_ports_auto = true;
static int __init pcie_port_setup(char *str)
{
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;
}
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rafael j. wysocki | rafael j. wysocki | 78 | 100.00% | 2 | 100.00% |
| Total | 78 | 100.00% | 2 | 100.00% |
__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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rafael j. wysocki | rafael j. wysocki | 17 | 89.47% | 1 | 50.00% |
| jiang liu | jiang liu | 2 | 10.53% | 1 | 50.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
static int pcie_portdrv_restore_config(struct pci_dev *dev)
{
int retval;
retval = pci_enable_device(dev);
if (retval)
return retval;
pci_set_master(dev);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 36 | 100.00% | 1 | 100.00% |
| Total | 36 | 100.00% | 1 | 100.00% |
#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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rafael j. wysocki | rafael j. wysocki | 36 | 92.31% | 1 | 50.00% |
| wang yijing | wang yijing | 3 | 7.69% | 1 | 50.00% |
| Total | 39 | 100.00% | 2 | 100.00% |
static const struct dev_pm_ops pcie_portdrv_pm_ops = {
.suspend = pcie_port_device_suspend,
.resume = pcie_port_device_resume,
.freeze = pcie_port_device_suspend,
.thaw = pcie_port_device_resume,
.poweroff = pcie_port_device_suspend,
.restore = pcie_port_device_resume,
.resume_noirq = pcie_port_resume_noirq,
};
#define PCIE_PORTDRV_PM_OPS (&pcie_portdrv_pm_ops)
#else /* !PM */
#define PCIE_PORTDRV_PM_OPS NULL
#endif /* !PM */
/*
* pcie_portdrv_probe - Probe PCI-Express port devices
* @dev: PCI-Express port device being probed
*
* If detected invokes the pcie_port_device_register() method for
* this port device.
*
*/
static int pcie_portdrv_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
int status;
if (!pci_is_pcie(dev) ||
((pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) &&
(pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM) &&
(pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM)))
return -ENODEV;
status = pcie_port_device_register(dev);
if (status)
return status;
pci_save_state(dev);
/*
* D3cold may not work properly on some PCIe port, so disable
* it by default.
*/
dev->d3cold_allowed = false;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| tom l. nguyen | tom l. nguyen | 35 | 38.89% | 1 | 12.50% |
| kenji kaneshige | kenji kaneshige | 26 | 28.89% | 1 | 12.50% |
| wang yijing | wang yijing | 9 | 10.00% | 1 | 12.50% |
| rafael j. wysocki | rafael j. wysocki | 8 | 8.89% | 2 | 25.00% |
| huang ying | huang ying | 7 | 7.78% | 1 | 12.50% |
| yanmin zhang | yanmin zhang | 4 | 4.44% | 1 | 12.50% |
| randy dunlap | randy dunlap | 1 | 1.11% | 1 | 12.50% |
| Total | 90 | 100.00% | 8 | 100.00% |
static void pcie_portdrv_remove(struct pci_dev *dev)
{
pcie_port_device_remove(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| tom l. nguyen | tom l. nguyen | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static int error_detected_iter(struct device *device, void *data)
{
struct pcie_device *pcie_device;
struct pcie_port_service_driver *driver;
struct aer_broadcast_data *result_data;
pci_ers_result_t status;
result_data = (struct aer_broadcast_data *) data;
if (device->bus == &pcie_port_bus_type && device->driver) {
driver = to_service_driver(device->driver);
if (!driver ||
!driver->err_handler ||
!driver->err_handler->error_detected)
return 0;
pcie_device = to_pcie_device(device);
/* Forward error detected message to service drivers */
status = driver->err_handler->error_detected(
pcie_device->port,
result_data->state);
result_data->result =
merge_result(result_data->result, status);
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 104 | 81.89% | 1 | 50.00% |
| henrik kretzschmar | henrik kretzschmar | 23 | 18.11% | 1 | 50.00% |
| Total | 127 | 100.00% | 2 | 100.00% |
static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev,
enum pci_channel_state error)
{
struct aer_broadcast_data data = {error, PCI_ERS_RESULT_CAN_RECOVER};
/* get true return value from &data */
device_for_each_child(&dev->dev, &data, error_detected_iter);
return data.result;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 29 | 65.91% | 1 | 16.67% |
| tom l. nguyen | tom l. nguyen | 11 | 25.00% | 3 | 50.00% |
| hidetoshi seto | hidetoshi seto | 3 | 6.82% | 1 | 16.67% |
| bjorn helgaas | bjorn helgaas | 1 | 2.27% | 1 | 16.67% |
| Total | 44 | 100.00% | 6 | 100.00% |
static int mmio_enabled_iter(struct device *device, void *data)
{
struct pcie_device *pcie_device;
struct pcie_port_service_driver *driver;
pci_ers_result_t status, *result;
result = (pci_ers_result_t *) data;
if (device->bus == &pcie_port_bus_type && device->driver) {
driver = to_service_driver(device->driver);
if (driver &&
driver->err_handler &&
driver->err_handler->mmio_enabled) {
pcie_device = to_pcie_device(device);
/* Forward error message to service drivers */
status = driver->err_handler->mmio_enabled(
pcie_device->port);
*result = merge_result(*result, status);
}
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 108 | 94.74% | 1 | 33.33% |
| li shaohua | li shaohua | 4 | 3.51% | 1 | 33.33% |
| tom l. nguyen | tom l. nguyen | 2 | 1.75% | 1 | 33.33% |
| Total | 114 | 100.00% | 3 | 100.00% |
static pci_ers_result_t pcie_portdrv_mmio_enabled(struct pci_dev *dev)
{
pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
/* get true return value from &status */
device_for_each_child(&dev->dev, &status, mmio_enabled_iter);
return status;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 26 | 78.79% | 1 | 25.00% |
| tom l. nguyen | tom l. nguyen | 6 | 18.18% | 2 | 50.00% |
| greg kroah-hartman | greg kroah-hartman | 1 | 3.03% | 1 | 25.00% |
| Total | 33 | 100.00% | 4 | 100.00% |
static int slot_reset_iter(struct device *device, void *data)
{
struct pcie_device *pcie_device;
struct pcie_port_service_driver *driver;
pci_ers_result_t status, *result;
result = (pci_ers_result_t *) data;
if (device->bus == &pcie_port_bus_type && device->driver) {
driver = to_service_driver(device->driver);
if (driver &&
driver->err_handler &&
driver->err_handler->slot_reset) {
pcie_device = to_pcie_device(device);
/* Forward error message to service drivers */
status = driver->err_handler->slot_reset(
pcie_device->port);
*result = merge_result(*result, status);
}
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 112 | 98.25% | 1 | 50.00% |
| tom l. nguyen | tom l. nguyen | 2 | 1.75% | 1 | 50.00% |
| Total | 114 | 100.00% | 2 | 100.00% |
static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
{
pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
/* If fatal, restore cfg space for possible link reset at upstream */
if (dev->error_state == pci_channel_io_frozen) {
dev->state_saved = true;
pci_restore_state(dev);
pcie_portdrv_restore_config(dev);
pci_enable_pcie_error_reporting(dev);
}
/* get true return value from &status */
device_for_each_child(&dev->dev, &status, slot_reset_iter);
return status;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 35 | 53.85% | 2 | 22.22% |
| tom l. nguyen | tom l. nguyen | 17 | 26.15% | 3 | 33.33% |
| rafael j. wysocki | rafael j. wysocki | 11 | 16.92% | 2 | 22.22% |
| linas vepstas | linas vepstas | 1 | 1.54% | 1 | 11.11% |
| greg kroah-hartman | greg kroah-hartman | 1 | 1.54% | 1 | 11.11% |
| Total | 65 | 100.00% | 9 | 100.00% |
static int resume_iter(struct device *device, void *data)
{
struct pcie_device *pcie_device;
struct pcie_port_service_driver *driver;
if (device->bus == &pcie_port_bus_type && device->driver) {
driver = to_service_driver(device->driver);
if (driver &&
driver->err_handler &&
driver->err_handler->resume) {
pcie_device = to_pcie_device(device);
/* Forward error message to service drivers */
driver->err_handler->resume(pcie_device->port);
}
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 87 | 100.00% | 1 | 100.00% |
| Total | 87 | 100.00% | 1 | 100.00% |
static void pcie_portdrv_err_resume(struct pci_dev *dev)
{
device_for_each_child(&dev->dev, NULL, resume_iter);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
/*
* LINUX Device Driver Model
*/
static const struct pci_device_id port_pci_ids[] = { {
/* handle any PCI-Express port */
PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0),
}, { /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, port_pci_ids);
static const struct pci_error_handlers pcie_portdrv_err_handler = {
.error_detected = pcie_portdrv_error_detected,
.mmio_enabled = pcie_portdrv_mmio_enabled,
.slot_reset = pcie_portdrv_slot_reset,
.resume = pcie_portdrv_err_resume,
};
static struct pci_driver pcie_portdriver = {
.name = "pcieport",
.id_table = &port_pci_ids[0],
.probe = pcie_portdrv_probe,
.remove = pcie_portdrv_remove,
.err_handler = &pcie_portdrv_err_handler,
.driver.pm = PCIE_PORTDRV_PM_OPS,
};
static int __init dmi_pcie_pme_disable_msi(const struct dmi_system_id *d)
{
pr_notice("%s detected: will not use MSI for PCIe PME signaling\n",
d->ident);
pcie_pme_disable_msi();
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rafael j. wysocki | rafael j. wysocki | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
static struct dmi_system_id __initdata pcie_portdrv_dmi_table[] = {
/*
* Boxes that should not use MSI for PCIe PME signaling.
*/
{
.callback = dmi_pcie_pme_disable_msi,
.ident = "MSI Wind U-100",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR,
"MICRO-STAR INTERNATIONAL CO., LTD"),
DMI_MATCH(DMI_PRODUCT_NAME, "U-100"),
},
},
{}
};
static int __init pcie_portdrv_init(void)
{
int retval;
if (pcie_ports_disabled)
return pci_register_driver(&pcie_portdriver);
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| tom l. nguyen | tom l. nguyen | 31 | 44.29% | 1 | 14.29% |
| randy dunlap | randy dunlap | 21 | 30.00% | 1 | 14.29% |
| rafael j. wysocki | rafael j. wysocki | 16 | 22.86% | 3 | 42.86% |
| sam ravnborg | sam ravnborg | 1 | 1.43% | 1 | 14.29% |
| christophe lucas | christophe lucas | 1 | 1.43% | 1 | 14.29% |
| Total | 70 | 100.00% | 7 | 100.00% |
module_init(pcie_portdrv_init);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| yanmin zhang | yanmin zhang | 609 | 47.17% | 3 | 8.82% |
| rafael j. wysocki | rafael j. wysocki | 320 | 24.79% | 9 | 26.47% |
| tom l. nguyen | tom l. nguyen | 248 | 19.21% | 3 | 8.82% |
| kenji kaneshige | kenji kaneshige | 26 | 2.01% | 1 | 2.94% |
| henrik kretzschmar | henrik kretzschmar | 23 | 1.78% | 1 | 2.94% |
| randy dunlap | randy dunlap | 22 | 1.70% | 2 | 5.88% |
| wang yijing | wang yijing | 12 | 0.93% | 1 | 2.94% |
| huang ying | huang ying | 7 | 0.54% | 1 | 2.94% |
| li shaohua | li shaohua | 4 | 0.31% | 1 | 2.94% |
| hidetoshi seto | hidetoshi seto | 4 | 0.31% | 1 | 2.94% |
| zheng yan | zheng yan | 3 | 0.23% | 1 | 2.94% |
| bjorn helgaas | bjorn helgaas | 2 | 0.15% | 2 | 5.88% |
| sam ravnborg | sam ravnborg | 2 | 0.15% | 1 | 2.94% |
| greg kroah-hartman | greg kroah-hartman | 2 | 0.15% | 1 | 2.94% |
| jiang liu | jiang liu | 2 | 0.15% | 1 | 2.94% |
| alexey dobriyan | alexey dobriyan | 1 | 0.08% | 1 | 2.94% |
| christophe lucas | christophe lucas | 1 | 0.08% | 1 | 2.94% |
| linas vepstas | linas vepstas | 1 | 0.08% | 1 | 2.94% |
| stefan assmann | stefan assmann | 1 | 0.08% | 1 | 2.94% |
| stephen hemminger | stephen hemminger | 1 | 0.08% | 1 | 2.94% |
| Total | 1291 | 100.00% | 34 | 100.00% |
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