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Merge branch 'pci/taku-prt-cleanup' into next

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* pci/taku-prt-cleanup:
  PCI/ACPI: Request _OSC control before scanning PCI root bus
  PCI: Don't pass pci_dev to pci_ext_cfg_avail()
  PCI/ACPI: Add _PRT interrupt routing info before enumerating devices
  ACPI: Pass segment/bus to _PRT add/del so they don't depend on pci_bus
This commit is contained in:
Bjorn Helgaas 2012-11-09 10:00:07 -07:00
parent fa20f6f240 8c33f51df4
commit 0550827006
7 changed files with 98 additions and 94 deletions
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2
arch/x86/pci/common.c
View file

@ -626,7 +626,7 @@ void pcibios_disable_device (struct pci_dev *dev)
pcibios_disable_irq(dev);
}
int pci_ext_cfg_avail(struct pci_dev *dev)
int pci_ext_cfg_avail(void)
{
if (raw_pci_ext_ops)
return 1;

10
drivers/acpi/pci_bind.c
View file

@ -49,7 +49,7 @@ static int acpi_pci_unbind(struct acpi_device *device)
if (!dev->subordinate)
goto out;
acpi_pci_irq_del_prt(dev->subordinate);
acpi_pci_irq_del_prt(pci_domain_nr(dev->bus), dev->subordinate->number);
device->ops.bind = NULL;
device->ops.unbind = NULL;
@ -63,7 +63,7 @@ static int acpi_pci_bind(struct acpi_device *device)
{
acpi_status status;
acpi_handle handle;
struct pci_bus *bus;
unsigned char bus;
struct pci_dev *dev;
dev = acpi_get_pci_dev(device->handle);
@ -100,11 +100,11 @@ static int acpi_pci_bind(struct acpi_device *device)
goto out;
if (dev->subordinate)
bus = dev->subordinate;
bus = dev->subordinate->number;
else
bus = dev->bus;
bus = dev->bus->number;
acpi_pci_irq_add_prt(device->handle, bus);
acpi_pci_irq_add_prt(device->handle, pci_domain_nr(dev->bus), bus);
out:
pci_dev_put(dev);

17
drivers/acpi/pci_irq.c
View file

@ -184,7 +184,7 @@ static void do_prt_fixups(struct acpi_prt_entry *entry,
}
}
static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus,
static int acpi_pci_irq_add_entry(acpi_handle handle, int segment, int bus,
struct acpi_pci_routing_table *prt)
{
struct acpi_prt_entry *entry;
@ -198,8 +198,8 @@ static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus,
* 1=INTA, 2=INTB. We use the PCI encoding throughout, so convert
* it here.
*/
entry->id.segment = pci_domain_nr(bus);
entry->id.bus = bus->number;
entry->id.segment = segment;
entry->id.bus = bus;
entry->id.device = (prt->address >> 16) & 0xFFFF;
entry->pin = prt->pin + 1;
@ -244,7 +244,7 @@ static int acpi_pci_irq_add_entry(acpi_handle handle, struct pci_bus *bus,
return 0;
}
int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus)
{
acpi_status status;
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@ -273,7 +273,7 @@ int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
entry = buffer.pointer;
while (entry && (entry->length > 0)) {
acpi_pci_irq_add_entry(handle, bus, entry);
acpi_pci_irq_add_entry(handle, segment, bus, entry);
entry = (struct acpi_pci_routing_table *)
((unsigned long)entry + entry->length);
}
@ -282,17 +282,16 @@ int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus)
return 0;
}
void acpi_pci_irq_del_prt(struct pci_bus *bus)
void acpi_pci_irq_del_prt(int segment, int bus)
{
struct acpi_prt_entry *entry, *tmp;
printk(KERN_DEBUG
"ACPI: Delete PCI Interrupt Routing Table for %04x:%02x\n",
pci_domain_nr(bus), bus->number);
segment, bus);
spin_lock(&acpi_prt_lock);
list_for_each_entry_safe(entry, tmp, &acpi_prt_list, list) {
if (pci_domain_nr(bus) == entry->id.segment
&& bus->number == entry->id.bus) {
if (segment == entry->id.segment && bus == entry->id.bus) {
list_del(&entry->list);
kfree(entry);
}

152
drivers/acpi/pci_root.c
View file

@ -454,6 +454,7 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
acpi_handle handle;
struct acpi_device *child;
u32 flags, base_flags;
bool is_osc_granted = false;
root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL);
if (!root)
@ -501,6 +502,20 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS);
device->driver_data = root;
printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
acpi_device_name(device), acpi_device_bid(device),
root->segment, &root->secondary);
/*
* PCI Routing Table
* -----------------
* Evaluate and parse _PRT, if exists.
*/
status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
if (ACPI_SUCCESS(status))
result = acpi_pci_irq_add_prt(device->handle, root->segment,
root->secondary.start);
root->mcfg_addr = acpi_pci_root_get_mcfg_addr(device->handle);
/*
@ -510,6 +525,60 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
acpi_pci_osc_support(root, flags);
/* Indicate support for various _OSC capabilities. */
if (pci_ext_cfg_avail())
flags |= OSC_EXT_PCI_CONFIG_SUPPORT;
if (pcie_aspm_support_enabled()) {
flags |= OSC_ACTIVE_STATE_PWR_SUPPORT |
OSC_CLOCK_PWR_CAPABILITY_SUPPORT;
}
if (pci_msi_enabled())
flags |= OSC_MSI_SUPPORT;
if (flags != base_flags) {
status = acpi_pci_osc_support(root, flags);
if (ACPI_FAILURE(status)) {
dev_info(&device->dev, "ACPI _OSC support "
"notification failed, disabling PCIe ASPM\n");
pcie_no_aspm();
flags = base_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(&device->dev,
"PCIe errors handled by BIOS.\n");
else
flags |= OSC_PCI_EXPRESS_AER_CONTROL;
}
dev_info(&device->dev,
"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)) {
is_osc_granted = true;
dev_info(&device->dev,
"ACPI _OSC control (0x%02x) granted\n", flags);
} else {
is_osc_granted = false;
dev_info(&device->dev,
"ACPI _OSC request failed (%s), "
"returned control mask: 0x%02x\n",
acpi_format_exception(status), flags);
}
} else {
dev_info(&device->dev,
"Unable to request _OSC control "
"(_OSC support mask: 0x%02x)\n", flags);
}
/*
* TBD: Need PCI interface for enumeration/configuration of roots.
*/
@ -518,10 +587,6 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
list_add_tail(&root->node, &acpi_pci_roots);
mutex_unlock(&acpi_pci_root_lock);
printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n",
acpi_device_name(device), acpi_device_bid(device),
root->segment, &root->secondary);
/*
* Scan the Root Bridge
* --------------------
@ -547,81 +612,20 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device)
if (result)
goto out_del_root;
/*
* PCI Routing Table
* -----------------
* Evaluate and parse _PRT, if exists.
*/
status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
if (ACPI_SUCCESS(status))
result = acpi_pci_irq_add_prt(device->handle, root->bus);
/*
* Scan and bind all _ADR-Based Devices
*/
list_for_each_entry(child, &device->children, node)
acpi_pci_bridge_scan(child);
/* Indicate support for various _OSC capabilities. */
if (pci_ext_cfg_avail(root->bus->self))
flags |= OSC_EXT_PCI_CONFIG_SUPPORT;
if (pcie_aspm_support_enabled())
flags |= OSC_ACTIVE_STATE_PWR_SUPPORT |
OSC_CLOCK_PWR_CAPABILITY_SUPPORT;
if (pci_msi_enabled())
flags |= OSC_MSI_SUPPORT;
if (flags != base_flags) {
status = acpi_pci_osc_support(root, flags);
if (ACPI_FAILURE(status)) {
dev_info(root->bus->bridge, "ACPI _OSC support "
"notification failed, disabling PCIe ASPM\n");
pcie_no_aspm();
flags = base_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);
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
/*
* We have ASPM control, but the FADT indicates
* that it's unsupported. Clear it.
*/
pcie_clear_aspm(root->bus);
}
} else {
dev_info(root->bus->bridge,
"ACPI _OSC request failed (%s), "
"returned control mask: 0x%02x\n",
acpi_format_exception(status), flags);
pr_info("ACPI _OSC control for PCIe not granted, "
"disabling ASPM\n");
pcie_no_aspm();
}
/* ASPM setting */
if (is_osc_granted) {
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM)
pcie_clear_aspm(root->bus);
} else {
dev_info(root->bus->bridge,
"Unable to request _OSC control "
"(_OSC support mask: 0x%02x)\n", flags);
pr_info("ACPI _OSC control for PCIe not granted, "
"disabling ASPM\n");
pcie_no_aspm();
}
pci_acpi_add_bus_pm_notifier(device, root->bus);
@ -634,6 +638,8 @@ out_del_root:
mutex_lock(&acpi_pci_root_lock);
list_del(&root->node);
mutex_unlock(&acpi_pci_root_lock);
acpi_pci_irq_del_prt(root->segment, root->secondary.start);
end:
kfree(root);
return result;
@ -682,7 +688,7 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
if (ACPI_SUCCESS(status))
acpi_pci_irq_del_prt(root->bus);
acpi_pci_irq_del_prt(root->segment, root->secondary.start);
pci_remove_root_bus(root->bus);

5
drivers/pci/pci.c
View file

@ -3843,14 +3843,13 @@ static void __devinit pci_no_domains(void)
}
/**
* pci_ext_cfg_enabled - can we access extended PCI config space?
* @dev: The PCI device of the root bridge.
* pci_ext_cfg_avail - can we access extended PCI config space?
*
* Returns 1 if we can access PCI extended config space (offsets
* greater than 0xff). This is the default implementation. Architecture
* implementations can override this.
*/
int __weak pci_ext_cfg_avail(struct pci_dev *dev)
int __weak pci_ext_cfg_avail(void)
{
return 1;
}

4
include/acpi/acpi_drivers.h
View file

@ -92,8 +92,8 @@ int acpi_pci_link_free_irq(acpi_handle handle);
/* ACPI PCI Interrupt Routing (pci_irq.c) */
int acpi_pci_irq_add_prt(acpi_handle handle, struct pci_bus *bus);
void acpi_pci_irq_del_prt(struct pci_bus *bus);
int acpi_pci_irq_add_prt(acpi_handle handle, int segment, int bus);
void acpi_pci_irq_del_prt(int segment, int bus);
/* ACPI PCI Device Binding (pci_bind.c) */

2
include/linux/pci.h
View file

@ -1604,7 +1604,7 @@ static inline void pci_mmcfg_early_init(void) { }
static inline void pci_mmcfg_late_init(void) { }
#endif
int pci_ext_cfg_avail(struct pci_dev *dev);
int pci_ext_cfg_avail(void);
void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);