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path: root/drivers/pci/pci-acpi.c
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Diffstat (limited to 'drivers/pci/pci-acpi.c')
-rw-r--r--drivers/pci/pci-acpi.c134
1 files changed, 86 insertions, 48 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 1af4008182f..ca4927ba843 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -12,9 +12,6 @@
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/pci-aspm.h>
-#include <acpi/acpi.h>
-#include <acpi/acpi_bus.h>
-
#include <linux/pci-acpi.h>
#include <linux/pm_runtime.h>
#include <linux/pm_qos.h>
@@ -47,20 +44,21 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context)
if (event != ACPI_NOTIFY_DEVICE_WAKE || !pci_dev)
return;
+ if (pci_dev->pme_poll)
+ pci_dev->pme_poll = false;
+
if (pci_dev->current_state == PCI_D3cold) {
pci_wakeup_event(pci_dev);
pm_runtime_resume(&pci_dev->dev);
return;
}
- if (!pci_dev->pm_cap || !pci_dev->pme_support
- || pci_check_pme_status(pci_dev)) {
- if (pci_dev->pme_poll)
- pci_dev->pme_poll = false;
+ /* Clear PME Status if set. */
+ if (pci_dev->pme_support)
+ pci_check_pme_status(pci_dev);
- pci_wakeup_event(pci_dev);
- pm_runtime_resume(&pci_dev->dev);
- }
+ pci_wakeup_event(pci_dev);
+ pm_runtime_resume(&pci_dev->dev);
if (pci_dev->subordinate)
pci_pme_wakeup_bus(pci_dev->subordinate);
@@ -140,7 +138,7 @@ phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
* if (_PRW at S-state x)
* choose from highest power _SxD to lowest power _SxW
* else // no _PRW at S-state x
- * choose highest power _SxD or any lower power
+ * choose highest power _SxD or any lower power
*/
static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
@@ -172,26 +170,25 @@ static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
static bool acpi_pci_power_manageable(struct pci_dev *dev)
{
- acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+ acpi_handle handle = ACPI_HANDLE(&dev->dev);
return handle ? acpi_bus_power_manageable(handle) : false;
}
static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
{
- acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
- acpi_handle tmp;
+ acpi_handle handle = ACPI_HANDLE(&dev->dev);
static const u8 state_conv[] = {
[PCI_D0] = ACPI_STATE_D0,
[PCI_D1] = ACPI_STATE_D1,
[PCI_D2] = ACPI_STATE_D2,
- [PCI_D3hot] = ACPI_STATE_D3,
- [PCI_D3cold] = ACPI_STATE_D3
+ [PCI_D3hot] = ACPI_STATE_D3_COLD,
+ [PCI_D3cold] = ACPI_STATE_D3_COLD,
};
int error = -EINVAL;
/* If the ACPI device has _EJ0, ignore the device */
- if (!handle || ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
+ if (!handle || acpi_has_method(handle, "_EJ0"))
return -ENODEV;
switch (state) {
@@ -209,15 +206,15 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
}
if (!error)
- dev_info(&dev->dev, "power state changed by ACPI to %s\n",
- pci_power_name(state));
+ dev_dbg(&dev->dev, "power state changed by ACPI to %s\n",
+ acpi_power_state_string(state_conv[state]));
return error;
}
static bool acpi_pci_can_wakeup(struct pci_dev *dev)
{
- acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+ acpi_handle handle = ACPI_HANDLE(&dev->dev);
return handle ? acpi_bus_can_wakeup(handle) : false;
}
@@ -283,48 +280,85 @@ static struct pci_platform_pm_ops acpi_pci_platform_pm = {
.is_manageable = acpi_pci_power_manageable,
.set_state = acpi_pci_set_power_state,
.choose_state = acpi_pci_choose_state,
- .can_wakeup = acpi_pci_can_wakeup,
.sleep_wake = acpi_pci_sleep_wake,
.run_wake = acpi_pci_run_wake,
};
+void acpi_pci_add_bus(struct pci_bus *bus)
+{
+ if (acpi_pci_disabled || !bus->bridge)
+ return;
+
+ acpi_pci_slot_enumerate(bus);
+ acpiphp_enumerate_slots(bus);
+}
+
+void acpi_pci_remove_bus(struct pci_bus *bus)
+{
+ if (acpi_pci_disabled || !bus->bridge)
+ return;
+
+ acpiphp_remove_slots(bus);
+ acpi_pci_slot_remove(bus);
+}
+
/* ACPI bus type */
-static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
+static struct acpi_device *acpi_pci_find_companion(struct device *dev)
{
- struct pci_dev * pci_dev;
- u64 addr;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ bool check_children;
+ u64 addr;
- pci_dev = to_pci_dev(dev);
+ check_children = pci_is_bridge(pci_dev);
/* Please ref to ACPI spec for the syntax of _ADR */
addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn);
- *handle = acpi_get_child(DEVICE_ACPI_HANDLE(dev->parent), addr);
- if (!*handle)
- return -ENODEV;
- return 0;
+ return acpi_find_child_device(ACPI_COMPANION(dev->parent), addr,
+ check_children);
}
-static int acpi_pci_find_root_bridge(struct device *dev, acpi_handle *handle)
+static void pci_acpi_setup(struct device *dev)
{
- int num;
- unsigned int seg, bus;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct acpi_device *adev = ACPI_COMPANION(dev);
- /*
- * The string should be the same as root bridge's name
- * Please look at 'pci_scan_bus_parented'
- */
- num = sscanf(dev_name(dev), "pci%04x:%02x", &seg, &bus);
- if (num != 2)
- return -ENODEV;
- *handle = acpi_get_pci_rootbridge_handle(seg, bus);
- if (!*handle)
- return -ENODEV;
- return 0;
+ if (!adev)
+ return;
+
+ pci_acpi_add_pm_notifier(adev, pci_dev);
+ if (!adev->wakeup.flags.valid)
+ return;
+
+ device_set_wakeup_capable(dev, true);
+ acpi_pci_sleep_wake(pci_dev, false);
+ if (adev->wakeup.flags.run_wake)
+ device_set_run_wake(dev, true);
+}
+
+static void pci_acpi_cleanup(struct device *dev)
+{
+ struct acpi_device *adev = ACPI_COMPANION(dev);
+
+ if (!adev)
+ return;
+
+ pci_acpi_remove_pm_notifier(adev);
+ if (adev->wakeup.flags.valid) {
+ device_set_wakeup_capable(dev, false);
+ device_set_run_wake(dev, false);
+ }
+}
+
+static bool pci_acpi_bus_match(struct device *dev)
+{
+ return dev_is_pci(dev);
}
static struct acpi_bus_type acpi_pci_bus = {
- .bus = &pci_bus_type,
- .find_device = acpi_pci_find_device,
- .find_bridge = acpi_pci_find_root_bridge,
+ .name = "PCI",
+ .match = pci_acpi_bus_match,
+ .find_companion = acpi_pci_find_companion,
+ .setup = pci_acpi_setup,
+ .cleanup = pci_acpi_cleanup,
};
static int __init acpi_pci_init(void)
@@ -332,19 +366,23 @@ static int __init acpi_pci_init(void)
int ret;
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_MSI) {
- printk(KERN_INFO"ACPI FADT declares the system doesn't support MSI, so disable it\n");
+ pr_info("ACPI FADT declares the system doesn't support MSI, so disable it\n");
pci_no_msi();
}
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
- printk(KERN_INFO"ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n");
+ pr_info("ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n");
pcie_no_aspm();
}
ret = register_acpi_bus_type(&acpi_pci_bus);
if (ret)
return 0;
+
pci_set_platform_pm(&acpi_pci_platform_pm);
+ acpi_pci_slot_init();
+ acpiphp_init();
+
return 0;
}
arch_initcall(acpi_pci_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 12:06:45 +0000