Commit 415e12b2 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki Committed by Jesse Barnes

PCI/ACPI: Request _OSC control once for each root bridge (v3)

Move the evaluation of acpi_pci_osc_control_set() (to request control of
PCI Express native features) into acpi_pci_root_add() to avoid calling
it many times for the same root complex with the same arguments.
Additionally, check if all of the requisite _OSC support bits are set
before calling acpi_pci_osc_control_set() for a given root complex.

References: https://bugzilla.kernel.org/show_bug.cgi?id=20232Reported-by: default avatarOzan Caglayan <ozan@pardus.org.tr>
Tested-by: default avatarOzan Caglayan <ozan@pardus.org.tr>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
parent 6e8af08d
......@@ -195,24 +195,24 @@ static int __init setup_hest_disable(char *str)
__setup("hest_disable", setup_hest_disable);
static int __init hest_init(void)
void __init acpi_hest_init(void)
{
acpi_status status;
int rc = -ENODEV;
unsigned int ghes_count = 0;
if (acpi_disabled)
goto err;
return;
if (hest_disable) {
pr_info(HEST_PFX "HEST tabling parsing is disabled.\n");
goto err;
pr_info(HEST_PFX "Table parsing disabled.\n");
return;
}
status = acpi_get_table(ACPI_SIG_HEST, 0,
(struct acpi_table_header **)&hest_tab);
if (status == AE_NOT_FOUND) {
pr_info(HEST_PFX "Table is not found!\n");
pr_info(HEST_PFX "Table not found.\n");
goto err;
} else if (ACPI_FAILURE(status)) {
const char *msg = acpi_format_exception(status);
......@@ -226,15 +226,11 @@ static int __init hest_init(void)
goto err;
rc = hest_ghes_dev_register(ghes_count);
if (rc)
goto err;
pr_info(HEST_PFX "HEST table parsing is initialized.\n");
if (!rc) {
pr_info(HEST_PFX "Table parsing has been initialized.\n");
return;
}
return 0;
err:
hest_disable = 1;
return rc;
}
subsys_initcall(hest_init);
......@@ -36,6 +36,7 @@
#include <linux/slab.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <acpi/apei.h>
#define PREFIX "ACPI: "
......@@ -47,6 +48,11 @@ static int acpi_pci_root_add(struct acpi_device *device);
static int acpi_pci_root_remove(struct acpi_device *device, int type);
static int acpi_pci_root_start(struct acpi_device *device);
#define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \
| OSC_ACTIVE_STATE_PWR_SUPPORT \
| OSC_CLOCK_PWR_CAPABILITY_SUPPORT \
| OSC_MSI_SUPPORT)
static const struct acpi_device_id root_device_ids[] = {
{"PNP0A03", 0},
{"", 0},
......@@ -566,6 +572,33 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
if (flags != base_flags)
acpi_pci_osc_support(root, flags);
if (!pcie_ports_disabled
&& (flags & ACPI_PCIE_REQ_SUPPORT) == ACPI_PCIE_REQ_SUPPORT) {
flags = OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL
| OSC_PCI_EXPRESS_NATIVE_HP_CONTROL
| OSC_PCI_EXPRESS_PME_CONTROL;
if (pci_aer_available()) {
if (aer_acpi_firmware_first())
dev_dbg(root->bus->bridge,
"PCIe errors handled by BIOS.\n");
else
flags |= OSC_PCI_EXPRESS_AER_CONTROL;
}
dev_info(root->bus->bridge,
"Requesting ACPI _OSC control (0x%02x)\n", flags);
status = acpi_pci_osc_control_set(device->handle, &flags,
OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
if (ACPI_SUCCESS(status))
dev_info(root->bus->bridge,
"ACPI _OSC control (0x%02x) granted\n", flags);
else
dev_dbg(root->bus->bridge,
"ACPI _OSC request failed (code %d)\n", status);
}
pci_acpi_add_bus_pm_notifier(device, root->bus);
if (device->wakeup.flags.run_wake)
device_set_run_wake(root->bus->bridge, true);
......@@ -603,6 +636,8 @@ static int __init acpi_pci_root_init(void)
if (acpi_pci_disabled)
return 0;
acpi_hest_init();
pci_acpi_crs_quirks();
if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0)
return -ENODEV;
......
......@@ -140,14 +140,6 @@ static inline void pci_no_msi(void) { }
static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
#endif
#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)
{
unsigned int parent_dstates = 0;
......
......@@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pci-acpi.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
......
......@@ -132,7 +132,6 @@ static inline int aer_osc_setup(struct pcie_device *pciedev)
#ifdef CONFIG_ACPI_APEI
extern int pcie_aer_get_firmware_first(struct pci_dev *pci_dev);
extern bool aer_acpi_firmware_first(void);
#else
static inline int pcie_aer_get_firmware_first(struct pci_dev *pci_dev)
{
......@@ -140,8 +139,6 @@ static inline int pcie_aer_get_firmware_first(struct pci_dev *pci_dev)
return pci_dev->__aer_firmware_first;
return 0;
}
static inline bool aer_acpi_firmware_first(void) { return false; }
#endif
static inline void pcie_aer_force_firmware_first(struct pci_dev *pci_dev,
......
......@@ -20,9 +20,6 @@
#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
......
......@@ -33,7 +33,7 @@
*/
int pcie_port_acpi_setup(struct pci_dev *port, int *srv_mask)
{
acpi_status status;
struct acpi_pci_root *root;
acpi_handle handle;
u32 flags;
......@@ -44,26 +44,11 @@ int pcie_port_acpi_setup(struct pci_dev *port, int *srv_mask)
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 (aer_acpi_firmware_first())
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);
root = acpi_pci_find_root(handle);
if (!root)
return -ENODEV;
}
dev_info(&port->dev, "ACPI _OSC control granted for 0x%02x\n", flags);
flags = root->osc_control_set;
*srv_mask = PCIE_PORT_SERVICE_VC;
if (flags & OSC_PCI_EXPRESS_NATIVE_HP_CONTROL)
......
......@@ -19,6 +19,12 @@
extern int hest_disable;
extern int erst_disable;
#ifdef CONFIG_ACPI_APEI
void __init acpi_hest_init(void);
#else
static inline void acpi_hest_init(void) { return; }
#endif
typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data);
int apei_hest_parse(apei_hest_func_t func, void *data);
......
......@@ -40,4 +40,10 @@ static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
{ return NULL; }
#endif
#ifdef CONFIG_ACPI_APEI
extern bool aer_acpi_firmware_first(void);
#else
static inline bool aer_acpi_firmware_first(void) { return false; }
#endif
#endif /* _PCI_ACPI_H_ */
......@@ -994,6 +994,9 @@ extern void pci_restore_msi_state(struct pci_dev *dev);
extern int pci_msi_enabled(void);
#endif
extern bool pcie_ports_disabled;
extern bool pcie_ports_auto;
#ifndef CONFIG_PCIEASPM
static inline int pcie_aspm_enabled(void)
{
......@@ -1003,6 +1006,14 @@ static inline int pcie_aspm_enabled(void)
extern int pcie_aspm_enabled(void);
#endif
#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
#ifndef CONFIG_PCIE_ECRC
static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
{
......
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