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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6

Browse source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI: bus speed strings should be const
  PCI hotplug: Fix build with CONFIG_ACPI unset
  PCI: PCIe: Remove the port driver module exit routine
  PCI: PCIe: Move PCIe PME code to the pcie directory
  PCI: PCIe: Disable PCIe port services during port initialization
  PCI: PCIe: Ask BIOS for control of all native services at once
  ACPI/PCI: Negotiate _OSC control bits before requesting them
  ACPI/PCI: Do not preserve _OSC control bits returned by a query
  ACPI/PCI: Make acpi_pci_query_osc() return control bits
  ACPI/PCI: Reorder checks in acpi_pci_osc_control_set()
  PCI: PCIe: Introduce commad line switch for disabling port services
  PCI: PCIe AER: Introduce pci_aer_available()
  x86/PCI: only define pci_domain_nr if PCI and PCI_DOMAINS are set
  PCI: provide stub pci_domain_nr function for !CONFIG_PCI configs
This commit is contained in:
Linus Torvalds 2010-09-07 16:00:17 -07:00
commit d56557af19
24 changed files with 282 additions and 292 deletions
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17
Documentation/kernel-parameters.txt
View file

@ -1974,15 +1974,18 @@ and is between 256 and 4096 characters. It is defined in the file
force Enable ASPM even on devices that claim not to support it.
WARNING: Forcing ASPM on may cause system lockups.
pcie_ports= [PCIE] PCIe ports handling:
auto Ask the BIOS whether or not to use native PCIe services
associated with PCIe ports (PME, hot-plug, AER). Use
them only if that is allowed by the BIOS.
native Use native PCIe services associated with PCIe ports
unconditionally.
compat Treat PCIe ports as PCI-to-PCI bridges, disable the PCIe
ports driver.
pcie_pme= [PCIE,PM] Native PCIe PME signaling options:
Format: {auto|force}[,nomsi]
auto Use native PCIe PME signaling if the BIOS allows the
kernel to control PCIe config registers of root ports.
force Use native PCIe PME signaling even if the BIOS refuses
to allow the kernel to control the relevant PCIe config
registers.
nomsi Do not use MSI for native PCIe PME signaling (this makes
all PCIe root ports use INTx for everything).
all PCIe root ports use INTx for all services).
pcmv= [HW,PCMCIA] BadgePAD 4

6
arch/x86/include/asm/pci.h
View file

@ -27,6 +27,9 @@ extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,
int node);
extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
#ifdef CONFIG_PCI
#ifdef CONFIG_PCI_DOMAINS
static inline int pci_domain_nr(struct pci_bus *bus)
{
struct pci_sysdata *sd = bus->sysdata;
@ -37,13 +40,12 @@ static inline int pci_proc_domain(struct pci_bus *bus)
{
return pci_domain_nr(bus);
}
#endif
/* Can be used to override the logic in pci_scan_bus for skipping
already-configured bus numbers - to be used for buggy BIOSes
or architectures with incomplete PCI setup by the loader */
#ifdef CONFIG_PCI
extern unsigned int pcibios_assign_all_busses(void);
extern int pci_legacy_init(void);
# ifdef CONFIG_ACPI

99
drivers/acpi/pci_root.c
View file

@ -33,7 +33,6 @@
#include <linux/pm_runtime.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/pci-aspm.h>
#include <linux/acpi.h>
#include <linux/slab.h>
#include <acpi/acpi_bus.h>
@ -226,22 +225,31 @@ static acpi_status acpi_pci_run_osc(acpi_handle handle,
return status;
}
static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags)
static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root,
u32 support,
u32 *control)
{
acpi_status status;
u32 support_set, result, capbuf[3];
u32 result, capbuf[3];
support &= OSC_PCI_SUPPORT_MASKS;
support |= root->osc_support_set;
/* do _OSC query for all possible controls */
support_set = root->osc_support_set | (flags & OSC_PCI_SUPPORT_MASKS);
capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
capbuf[OSC_SUPPORT_TYPE] = support_set;
capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS;
capbuf[OSC_SUPPORT_TYPE] = support;
if (control) {
*control &= OSC_PCI_CONTROL_MASKS;
capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set;
} else {
/* Run _OSC query for all possible controls. */
capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS;
}
status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
if (ACPI_SUCCESS(status)) {
root->osc_support_set = support_set;
root->osc_control_qry = result;
root->osc_queried = 1;
root->osc_support_set = support;
if (control)
*control = result;
}
return status;
}
@ -255,7 +263,7 @@ static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
if (ACPI_FAILURE(status))
return status;
mutex_lock(&osc_lock);
status = acpi_pci_query_osc(root, flags);
status = acpi_pci_query_osc(root, flags, NULL);
mutex_unlock(&osc_lock);
return status;
}
@ -365,55 +373,70 @@ struct pci_dev *acpi_get_pci_dev(acpi_handle handle)
EXPORT_SYMBOL_GPL(acpi_get_pci_dev);
/**
* acpi_pci_osc_control_set - commit requested control to Firmware
* @handle: acpi_handle for the target ACPI object
* @flags: driver's requested control bits
* acpi_pci_osc_control_set - Request control of PCI root _OSC features.
* @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex).
* @mask: Mask of _OSC bits to request control of, place to store control mask.
* @req: Mask of _OSC bits the control of is essential to the caller.
*
* Attempt to take control from Firmware on requested control bits.
* Run _OSC query for @mask and if that is successful, compare the returned
* mask of control bits with @req. If all of the @req bits are set in the
* returned mask, run _OSC request for it.
*
* The variable at the @mask address may be modified regardless of whether or
* not the function returns success. On success it will contain the mask of
* _OSC bits the BIOS has granted control of, but its contents are meaningless
* on failure.
**/
acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags)
acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req)
{
acpi_status status;
u32 control_req, result, capbuf[3];
acpi_handle tmp;
struct acpi_pci_root *root;
acpi_status status;
u32 ctrl, capbuf[3];
acpi_handle tmp;
status = acpi_get_handle(handle, "_OSC", &tmp);
if (ACPI_FAILURE(status))
return status;
if (!mask)
return AE_BAD_PARAMETER;
control_req = (flags & OSC_PCI_CONTROL_MASKS);
if (!control_req)
ctrl = *mask & OSC_PCI_CONTROL_MASKS;
if ((ctrl & req) != req)
return AE_TYPE;
root = acpi_pci_find_root(handle);
if (!root)
return AE_NOT_EXIST;
status = acpi_get_handle(handle, "_OSC", &tmp);
if (ACPI_FAILURE(status))
return status;
mutex_lock(&osc_lock);
*mask = ctrl | root->osc_control_set;
/* No need to evaluate _OSC if the control was already granted. */
if ((root->osc_control_set & control_req) == control_req)
if ((root->osc_control_set & ctrl) == ctrl)
goto out;
/* Need to query controls first before requesting them */
if (!root->osc_queried) {
status = acpi_pci_query_osc(root, root->osc_support_set);
/* Need to check the available controls bits before requesting them. */
while (*mask) {
status = acpi_pci_query_osc(root, root->osc_support_set, mask);
if (ACPI_FAILURE(status))
goto out;
if (ctrl == *mask)
break;
ctrl = *mask;
}
if ((root->osc_control_qry & control_req) != control_req) {
printk(KERN_DEBUG
"Firmware did not grant requested _OSC control\n");
if ((ctrl & req) != req) {
status = AE_SUPPORT;
goto out;
}
capbuf[OSC_QUERY_TYPE] = 0;
capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set;
capbuf[OSC_CONTROL_TYPE] = root->osc_control_set | control_req;
status = acpi_pci_run_osc(handle, capbuf, &result);
capbuf[OSC_CONTROL_TYPE] = ctrl;
status = acpi_pci_run_osc(handle, capbuf, mask);
if (ACPI_SUCCESS(status))
root->osc_control_set = result;
root->osc_control_set = *mask;
out:
mutex_unlock(&osc_lock);
return status;
@ -544,14 +567,6 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
if (flags != base_flags)
acpi_pci_osc_support(root, flags);
status = acpi_pci_osc_control_set(root->device->handle,
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
if (ACPI_FAILURE(status)) {
printk(KERN_INFO "Unable to assume PCIe control: Disabling ASPM\n");
pcie_no_aspm();
}
pci_acpi_add_bus_pm_notifier(device, root->bus);
if (device->wakeup.flags.run_wake)
device_set_run_wake(root->bus->bridge, true);

6
drivers/pci/hotplug/acpi_pcihp.c
View file

@ -338,9 +338,7 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags)
acpi_handle chandle, handle;
struct acpi_buffer string = { ACPI_ALLOCATE_BUFFER, NULL };
flags &= (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL |
OSC_SHPC_NATIVE_HP_CONTROL |
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
flags &= OSC_SHPC_NATIVE_HP_CONTROL;
if (!flags) {
err("Invalid flags %u specified!\n", flags);
return -EINVAL;
@ -360,7 +358,7 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags)
acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
dbg("Trying to get hotplug control for %s\n",
(char *)string.pointer);
status = acpi_pci_osc_control_set(handle, flags);
status = acpi_pci_osc_control_set(handle, &flags, flags);
if (ACPI_SUCCESS(status))
goto got_one;
if (status == AE_SUPPORT)

16
drivers/pci/hotplug/pciehp.h
View file

@ -176,19 +176,11 @@ static inline void pciehp_firmware_init(void)
{
pciehp_acpi_slot_detection_init();
}
static inline int pciehp_get_hp_hw_control_from_firmware(struct pci_dev *dev)
{
int retval;
u32 flags = (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL |
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
retval = acpi_get_hp_hw_control_from_firmware(dev, flags);
if (retval)
return retval;
return pciehp_acpi_slot_detection_check(dev);
}
#else
#define pciehp_firmware_init() do {} while (0)
#define pciehp_get_hp_hw_control_from_firmware(dev) 0
static inline int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
{
return 0;
}
#endif /* CONFIG_ACPI */
#endif /* _PCIEHP_H */

4
drivers/pci/hotplug/pciehp_acpi.c
View file

@ -85,9 +85,7 @@ static int __init dummy_probe(struct pcie_device *dev)
acpi_handle handle;
struct dummy_slot *slot, *tmp;
struct pci_dev *pdev = dev->port;
/* Note: pciehp_detect_mode != PCIEHP_DETECT_ACPI here */
if (pciehp_get_hp_hw_control_from_firmware(pdev))
return -ENODEV;
pos = pci_pcie_cap(pdev);
if (!pos)
return -ENODEV;

4
drivers/pci/hotplug/pciehp_core.c
View file

@ -59,7 +59,7 @@ module_param(pciehp_force, bool, 0644);
MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if _OSC and OSHP are missing");
MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing");
#define PCIE_MODULE_NAME "pciehp"
@ -235,7 +235,7 @@ static int pciehp_probe(struct pcie_device *dev)
dev_info(&dev->device,
"Bypassing BIOS check for pciehp use on %s\n",
pci_name(dev->port));
else if (pciehp_get_hp_hw_control_from_firmware(dev->port))
else if (pciehp_acpi_slot_detection_check(dev->port))
goto err_out_none;
ctrl = pcie_init(dev);

2
drivers/pci/pci.h
View file

@ -140,8 +140,10 @@ static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
#ifdef CONFIG_PCIEAER
void pci_no_aer(void);
bool pci_aer_available(void);
#else
static inline void pci_no_aer(void) { }
static inline bool pci_aer_available(void) { return false; }
#endif
static inline int pci_no_d1d2(struct pci_dev *dev)

3
drivers/pci/pcie/Makefile
View file

@ -6,10 +6,11 @@
obj-$(CONFIG_PCIEASPM) += aspm.o
pcieportdrv-y := portdrv_core.o portdrv_pci.o portdrv_bus.o
pcieportdrv-$(CONFIG_ACPI) += portdrv_acpi.o
obj-$(CONFIG_PCIEPORTBUS) += pcieportdrv.o
# Build PCI Express AER if needed
obj-$(CONFIG_PCIEAER) += aer/
obj-$(CONFIG_PCIE_PME) += pme/
obj-$(CONFIG_PCIE_PME) += pme.o

9
drivers/pci/pcie/aer/aerdrv.c
View file

@ -72,6 +72,11 @@ void pci_no_aer(void)
pcie_aer_disable = 1; /* has priority over 'forceload' */
}
bool pci_aer_available(void)
{
return !pcie_aer_disable && pci_msi_enabled();
}
static int set_device_error_reporting(struct pci_dev *dev, void *data)
{
bool enable = *((bool *)data);
@ -411,9 +416,7 @@ static void aer_error_resume(struct pci_dev *dev)
*/
static int __init aer_service_init(void)
{
if (pcie_aer_disable)
return -ENXIO;
if (!pci_msi_enabled())
if (!pci_aer_available())
return -ENXIO;
return pcie_port_service_register(&aerdriver);
}

36
drivers/pci/pcie/aer/aerdrv_acpi.c
View file

@ -19,42 +19,6 @@
#include <acpi/apei.h>
#include "aerdrv.h"
/**
* aer_osc_setup - run ACPI _OSC method
* @pciedev: pcie_device which AER is being enabled on
*
* @return: Zero on success. Nonzero otherwise.
*
* Invoked when PCIe bus loads AER service driver. To avoid conflict with
* BIOS AER support requires BIOS to yield AER control to OS native driver.
**/
int aer_osc_setup(struct pcie_device *pciedev)
{
acpi_status status = AE_NOT_FOUND;
struct pci_dev *pdev = pciedev->port;
acpi_handle handle = NULL;
if (acpi_pci_disabled)
return -1;
handle = acpi_find_root_bridge_handle(pdev);
if (handle) {
status = acpi_pci_osc_control_set(handle,
OSC_PCI_EXPRESS_AER_CONTROL |
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
}
if (ACPI_FAILURE(status)) {
dev_printk(KERN_DEBUG, &pciedev->device, "AER service couldn't "
"init device: %s\n",
(status == AE_SUPPORT || status == AE_NOT_FOUND) ?
"no _OSC support" : "_OSC failed");
return -1;
}
return 0;
}
#ifdef CONFIG_ACPI_APEI
static inline int hest_match_pci(struct acpi_hest_aer_common *p,
struct pci_dev *pci)

14
drivers/pci/pcie/aer/aerdrv_core.c
View file

@ -772,22 +772,10 @@ void aer_isr(struct work_struct *work)
*/
int aer_init(struct pcie_device *dev)
{
if (pcie_aer_get_firmware_first(dev->port)) {
dev_printk(KERN_DEBUG, &dev->device,
"PCIe errors handled by platform firmware.\n");
goto out;
}
if (aer_osc_setup(dev))
goto out;
return 0;
out:
if (forceload) {
dev_printk(KERN_DEBUG, &dev->device,
"aerdrv forceload requested.\n");
pcie_aer_force_firmware_first(dev->port, 0);
return 0;
}
return -ENXIO;
return 0;
}

66
drivers/pci/pcie/pme/pcie_pme.c → drivers/pci/pcie/pme.c
View file

@ -23,37 +23,12 @@
#include <linux/pci-acpi.h>
#include <linux/pm_runtime.h>
#include "../../pci.h"
#include "pcie_pme.h"
#include "../pci.h"
#include "portdrv.h"
#define PCI_EXP_RTSTA_PME 0x10000 /* PME status */
#define PCI_EXP_RTSTA_PENDING 0x20000 /* PME pending */
/*
* If set, this switch will prevent the PCIe root port PME service driver from
* being registered. Consequently, the interrupt-based PCIe PME signaling will
* not be used by any PCIe root ports in that case.
*/
static bool pcie_pme_disabled = true;
/*
* The PCI Express Base Specification 2.0, Section 6.1.8, states the following:
* "In order to maintain compatibility with non-PCI Express-aware system
* software, system power management logic must be configured by firmware to use
* the legacy mechanism of signaling PME by default. PCI Express-aware system
* software must notify the firmware prior to enabling native, interrupt-based
* PME signaling." However, if the platform doesn't provide us with a suitable
* notification mechanism or the notification fails, it is not clear whether or
* not we are supposed to use the interrupt-based PCIe PME signaling. The
* switch below can be used to indicate the desired behaviour. When set, it
* will make the kernel use the interrupt-based PCIe PME signaling regardless of
* the platform notification status, although the kernel will attempt to notify
* the platform anyway. When unset, it will prevent the kernel from using the
* the interrupt-based PCIe PME signaling if the platform notification fails,
* which is the default.
*/
static bool pcie_pme_force_enable;
/*
* If this switch is set, MSI will not be used for PCIe PME signaling. This
* causes the PCIe port driver to use INTx interrupts only, but it turns out
@ -64,38 +39,13 @@ bool pcie_pme_msi_disabled;
static int __init pcie_pme_setup(char *str)
{
if (!strncmp(str, "auto", 4))
pcie_pme_disabled = false;
else if (!strncmp(str, "force", 5))
pcie_pme_force_enable = true;
str = strchr(str, ',');
if (str) {
str++;
str += strspn(str, " \t");
if (*str && !strcmp(str, "nomsi"))
pcie_pme_msi_disabled = true;
}
if (!strncmp(str, "nomsi", 5))
pcie_pme_msi_disabled = true;
return 1;
}
__setup("pcie_pme=", pcie_pme_setup);
/**
* pcie_pme_platform_setup - Ensure that the kernel controls the PCIe PME.
* @srv: PCIe PME root port service to use for carrying out the check.
*
* Notify the platform that the native PCIe PME is going to be used and return
* 'true' if the control of the PCIe PME registers has been acquired from the
* platform.
*/
static bool pcie_pme_platform_setup(struct pcie_device *srv)
{
if (!pcie_pme_platform_notify(srv))
return true;
return pcie_pme_force_enable;
}
struct pcie_pme_service_data {
spinlock_t lock;
struct pcie_device *srv;
@ -108,7 +58,7 @@ struct pcie_pme_service_data {
* @dev: PCIe root port or event collector.
* @enable: Enable or disable the interrupt.
*/
static void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable)
void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable)
{
int rtctl_pos;
u16 rtctl;
@ -417,9 +367,6 @@ static int pcie_pme_probe(struct pcie_device *srv)
struct pcie_pme_service_data *data;
int ret;
if (!pcie_pme_platform_setup(srv))
return -EACCES;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
@ -509,8 +456,7 @@ static struct pcie_port_service_driver pcie_pme_driver = {
*/
static int __init pcie_pme_service_init(void)
{
return pcie_pme_disabled ?
-ENODEV : pcie_port_service_register(&pcie_pme_driver);
return pcie_port_service_register(&pcie_pme_driver);
}
module_init(pcie_pme_service_init);

8
drivers/pci/pcie/pme/Makefile
View file

@ -1,8 +0,0 @@
#
# Makefile for PCI-Express Root Port PME signaling driver
#
obj-$(CONFIG_PCIE_PME) += pmedriver.o
pmedriver-objs := pcie_pme.o
pmedriver-$(CONFIG_ACPI) += pcie_pme_acpi.o

28
drivers/pci/pcie/pme/pcie_pme.h
View file

@ -1,28 +0,0 @@
/*
* drivers/pci/pcie/pme/pcie_pme.h
*
* PCI Express Root Port PME signaling support
*
* Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
*/
#ifndef _PCIE_PME_H_
#define _PCIE_PME_H_
struct pcie_device;
#ifdef CONFIG_ACPI
extern int pcie_pme_acpi_setup(struct pcie_device *srv);
static inline int pcie_pme_platform_notify(struct pcie_device *srv)
{
return pcie_pme_acpi_setup(srv);
}
#else /* !CONFIG_ACPI */
static inline int pcie_pme_platform_notify(struct pcie_device *srv)
{
return 0;
}
#endif /* !CONFIG_ACPI */
#endif

54
drivers/pci/pcie/pme/pcie_pme_acpi.c
View file

@ -1,54 +0,0 @@
/*
* PCIe Native PME support, ACPI-related part
*
* Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License V2. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/pci-acpi.h>
#include <linux/pcieport_if.h>
/**
* pcie_pme_acpi_setup - Request the ACPI BIOS to release control over PCIe PME.
* @srv - PCIe PME service for a root port or event collector.
*
* Invoked when the PCIe bus type loads PCIe PME service driver. To avoid
* conflict with the BIOS PCIe support requires the BIOS to yield PCIe PME
* control to the kernel.
*/
int pcie_pme_acpi_setup(struct pcie_device *srv)
{
acpi_status status = AE_NOT_FOUND;
struct pci_dev *port = srv->port;
acpi_handle handle;
int error = 0;
if (acpi_pci_disabled)
return -ENOSYS;
dev_info(&port->dev, "Requesting control of PCIe PME from ACPI BIOS\n");
handle = acpi_find_root_bridge_handle(port);
if (!handle)
return -EINVAL;
status = acpi_pci_osc_control_set(handle,
OSC_PCI_EXPRESS_PME_CONTROL |
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
if (ACPI_FAILURE(status)) {
dev_info(&port->dev,
"Failed to receive control of PCIe PME service: %s\n",
(status == AE_SUPPORT || status == AE_NOT_FOUND) ?
"no _OSC support" : "ACPI _OSC failed");
error = -ENODEV;
}
return error;
}

22
drivers/pci/pcie/portdrv.h
View file

@ -20,6 +20,9 @@
#define get_descriptor_id(type, service) (((type - 4) << 4) | service)
extern bool pcie_ports_disabled;
extern bool pcie_ports_auto;
extern struct bus_type pcie_port_bus_type;
extern int pcie_port_device_register(struct pci_dev *dev);
#ifdef CONFIG_PM
@ -30,6 +33,8 @@ extern void pcie_port_device_remove(struct pci_dev *dev);
extern int __must_check pcie_port_bus_register(void);
extern void pcie_port_bus_unregister(void);
struct pci_dev;
#ifdef CONFIG_PCIE_PME
extern bool pcie_pme_msi_disabled;
@ -42,9 +47,26 @@ static inline bool pcie_pme_no_msi(void)
{
return pcie_pme_msi_disabled;
}
extern void pcie_pme_interrupt_enable(struct pci_dev *dev, bool enable);
#else /* !CONFIG_PCIE_PME */
static inline void pcie_pme_disable_msi(void) {}
static inline bool pcie_pme_no_msi(void) { return false; }
static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {}
#endif /* !CONFIG_PCIE_PME */
#ifdef CONFIG_ACPI
extern int pcie_port_acpi_setup(struct pci_dev *port, int *mask);
static inline int pcie_port_platform_notify(struct pci_dev *port, int *mask)
{
return pcie_port_acpi_setup(port, mask);
}
#else /* !CONFIG_ACPI */
static inline int pcie_port_platform_notify(struct pci_dev *port, int *mask)
{
return 0;
}
#endif /* !CONFIG_ACPI */
#endif /* _PORTDRV_H_ */

77
drivers/pci/pcie/portdrv_acpi.c Normal file
View file

@ -0,0 +1,77 @@
/*
* PCIe Port Native Services Support, ACPI-Related Part
*
* Copyright (C) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License V2. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/pci-acpi.h>
#include <linux/pcieport_if.h>
#include "aer/aerdrv.h"
#include "../pci.h"
/**
* pcie_port_acpi_setup - Request the BIOS to release control of PCIe services.
* @port: PCIe Port service for a root port or event collector.
* @srv_mask: Bit mask of services that can be enabled for @port.
*
* Invoked when @port is identified as a PCIe port device. To avoid conflicts
* with the BIOS PCIe port native services support requires the BIOS to yield
* control of these services to the kernel. The mask of services that the BIOS
* allows to be enabled for @port is written to @srv_mask.
*
* NOTE: It turns out that we cannot do that for individual port services
* separately, because that would make some systems work incorrectly.
*/
int pcie_port_acpi_setup(struct pci_dev *port, int *srv_mask)
{
acpi_status status;
acpi_handle handle;
u32 flags;
if (acpi_pci_disabled)
return 0;
handle = acpi_find_root_bridge_handle(port);
if (!handle)
return -EINVAL;
flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL
| OSC_PCI_EXPRESS_NATIVE_HP_CONTROL
| OSC_PCI_EXPRESS_PME_CONTROL;
if (pci_aer_available()) {
if (pcie_aer_get_firmware_first(port))
dev_dbg(&port->dev, "PCIe errors handled by BIOS.\n");
else
flags |= OSC_PCI_EXPRESS_AER_CONTROL;
}
status = acpi_pci_osc_control_set(handle, &flags,
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
if (ACPI_FAILURE(status)) {
dev_dbg(&port->dev, "ACPI _OSC request failed (code %d)\n",
status);
return -ENODEV;
}
dev_info(&port->dev, "ACPI _OSC control granted for 0x%02x\n", flags);
*srv_mask = PCIE_PORT_SERVICE_VC;
if (flags & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL)
*srv_mask |= PCIE_PORT_SERVICE_HP;
if (flags & OSC_PCI_EXPRESS_PME_CONTROL)
*srv_mask |= PCIE_PORT_SERVICE_PME;
if (flags & OSC_PCI_EXPRESS_AER_CONTROL)
*srv_mask |= PCIE_PORT_SERVICE_AER;
return 0;
}

53
drivers/pci/pcie/portdrv_core.c
View file

@ -14,6 +14,8 @@
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/pcieport_if.h>
#include <linux/aer.h>
#include <linux/pci-aspm.h>
#include "../pci.h"
#include "portdrv.h"
@ -236,24 +238,64 @@ static int get_port_device_capability(struct pci_dev *dev)
int services = 0, pos;
u16 reg16;
u32 reg32;
int cap_mask;
int err;
err = pcie_port_platform_notify(dev, &cap_mask);
if (pcie_ports_auto) {
if (err) {
pcie_no_aspm();
return 0;
}
} else {
cap_mask = PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP
| PCIE_PORT_SERVICE_VC;
if (pci_aer_available())
cap_mask |= PCIE_PORT_SERVICE_AER;
}
pos = pci_pcie_cap(dev);
pci_read_config_word(dev, pos + PCI_EXP_FLAGS, &reg16);
/* Hot-Plug Capable */
if (reg16 & PCI_EXP_FLAGS_SLOT) {
if ((cap_mask & PCIE_PORT_SERVICE_HP) && (reg16 & PCI_EXP_FLAGS_SLOT)) {
pci_read_config_dword(dev, pos + PCI_EXP_SLTCAP, &reg32);
if (reg32 & PCI_EXP_SLTCAP_HPC)
if (reg32 & PCI_EXP_SLTCAP_HPC) {
services |= PCIE_PORT_SERVICE_HP;
/*
* Disable hot-plug interrupts in case they have been
* enabled by the BIOS and the hot-plug service driver
* is not loaded.
*/
pos += PCI_EXP_SLTCTL;
pci_read_config_word(dev, pos, &reg16);
reg16 &= ~(PCI_EXP_SLTCTL_CCIE | PCI_EXP_SLTCTL_HPIE);
pci_write_config_word(dev, pos, reg16);
}
}
/* AER capable */
if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR))
if ((cap_mask & PCIE_PORT_SERVICE_AER)
&& pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) {
services |= PCIE_PORT_SERVICE_AER;
/*
* Disable AER on this port in case it's been enabled by the
* BIOS (the AER service driver will enable it when necessary).
*/
pci_disable_pcie_error_reporting(dev);
}
/* VC support */
if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC))
services |= PCIE_PORT_SERVICE_VC;
/* Root ports are capable of generating PME too */
if (dev->pcie_type == PCI_EXP_TYPE_ROOT_PORT)
if ((cap_mask & PCIE_PORT_SERVICE_PME)
&& dev->pcie_type == PCI_EXP_TYPE_ROOT_PORT) {
services |= PCIE_PORT_SERVICE_PME;
/*
* Disable PME interrupt on this port in case it's been enabled
* by the BIOS (the PME service driver will enable it when
* necessary).
*/
pcie_pme_interrupt_enable(dev, false);
}
return services;
}
@ -494,6 +536,9 @@ static void pcie_port_shutdown_service(struct device *dev) {}
*/
int pcie_port_service_register(struct pcie_port_service_driver *new)
{
if (pcie_ports_disabled)
return -ENODEV;
new->driver.name = (char *)new->name;
new->driver.bus = &pcie_port_bus_type;
new->driver.probe = pcie_port_probe_service;

38
drivers/pci/pcie/portdrv_pci.c
View file

@ -15,6 +15,7 @@
#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"
@ -29,6 +30,31 @@ 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;
}
__setup("pcie_ports=", pcie_port_setup);
/* global data */
static int pcie_portdrv_restore_config(struct pci_dev *dev)
@ -301,6 +327,11 @@ static int __init pcie_portdrv_init(void)
{
int retval;
if (pcie_ports_disabled) {
pcie_no_aspm();
return -EACCES;
}
dmi_check_system(pcie_portdrv_dmi_table);
retval = pcie_port_bus_register();
@ -315,11 +346,4 @@ static int __init pcie_portdrv_init(void)
return retval;
}
static void __exit pcie_portdrv_exit(void)
{
pci_unregister_driver(&pcie_portdriver);
pcie_port_bus_unregister();
}
module_init(pcie_portdrv_init);
module_exit(pcie_portdrv_exit);

2
drivers/pci/slot.c
View file

@ -49,7 +49,7 @@ static ssize_t address_read_file(struct pci_slot *slot, char *buf)
}
/* these strings match up with the values in pci_bus_speed */
static char *pci_bus_speed_strings[] = {
static const char *pci_bus_speed_strings[] = {
"33 MHz PCI", /* 0x00 */
"66 MHz PCI", /* 0x01 */
"66 MHz PCI-X", /* 0x02 */

3
include/acpi/acpi_bus.h
View file

@ -377,9 +377,6 @@ struct acpi_pci_root {
u32 osc_support_set; /* _OSC state of support bits */
u32 osc_control_set; /* _OSC state of control bits */
u32 osc_control_qry; /* the latest _OSC query result */
u32 osc_queried:1; /* has _OSC control been queried? */
};
/* helper */

4
include/linux/acpi.h
View file

@ -304,8 +304,8 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
OSC_PCI_EXPRESS_PME_CONTROL | \
OSC_PCI_EXPRESS_AER_CONTROL | \
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL)
extern acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags);
extern acpi_status acpi_pci_osc_control_set(acpi_handle handle,
u32 *mask, u32 req);
extern void acpi_early_init(void);
#else /* !CONFIG_ACPI */

3
include/linux/pci.h
View file

@ -1214,6 +1214,9 @@ static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
unsigned int devfn)
{ return NULL; }
static inline int pci_domain_nr(struct pci_bus *bus)
{ return 0; }
#define dev_is_pci(d) (false)
#define dev_is_pf(d) (false)
#define dev_num_vf(d) (0)