#include <linux/init.h>
#include <linux/pci.h>
#include <linux/module.h>
+#include <linux/pci-aspm.h>
#include <acpi/acpi.h>
-#include <acpi/acnamesp.h>
-#include <acpi/acresrc.h>
#include <acpi/acpi_bus.h>
#include <linux/pci-acpi.h>
#include "pci.h"
-struct acpi_osc_data {
- acpi_handle handle;
- u32 support_set;
- u32 control_set;
- int is_queried;
- u32 query_result;
- struct list_head sibiling;
-};
-static LIST_HEAD(acpi_osc_data_list);
-
-struct acpi_osc_args {
- u32 capbuf[3];
- u32 query_result;
-};
-
-static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
-{
- struct acpi_osc_data *data;
-
- list_for_each_entry(data, &acpi_osc_data_list, sibiling) {
- if (data->handle == handle)
- return data;
- }
- data = kzalloc(sizeof(*data), GFP_KERNEL);
- if (!data)
- return NULL;
- INIT_LIST_HEAD(&data->sibiling);
- data->handle = handle;
- list_add_tail(&data->sibiling, &acpi_osc_data_list);
- return data;
-}
-
-static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
-
-static acpi_status acpi_run_osc(acpi_handle handle,
- struct acpi_osc_args *osc_args)
-{
- acpi_status status;
- struct acpi_object_list input;
- union acpi_object in_params[4];
- struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
- union acpi_object *out_obj;
- u32 osc_dw0, flags = osc_args->capbuf[OSC_QUERY_TYPE];
-
- /* Setting up input parameters */
- input.count = 4;
- input.pointer = in_params;
- in_params[0].type = ACPI_TYPE_BUFFER;
- in_params[0].buffer.length = 16;
- in_params[0].buffer.pointer = OSC_UUID;
- in_params[1].type = ACPI_TYPE_INTEGER;
- in_params[1].integer.value = 1;
- in_params[2].type = ACPI_TYPE_INTEGER;
- in_params[2].integer.value = 3;
- in_params[3].type = ACPI_TYPE_BUFFER;
- in_params[3].buffer.length = 12;
- in_params[3].buffer.pointer = (u8 *)osc_args->capbuf;
-
- status = acpi_evaluate_object(handle, "_OSC", &input, &output);
- if (ACPI_FAILURE(status))
- return status;
-
- out_obj = output.pointer;
- if (out_obj->type != ACPI_TYPE_BUFFER) {
- printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n");
- status = AE_TYPE;
- goto out_kfree;
- }
- osc_dw0 = *((u32 *) out_obj->buffer.pointer);
- if (osc_dw0) {
- if (osc_dw0 & OSC_REQUEST_ERROR)
- printk(KERN_DEBUG "_OSC request fails\n");
- if (osc_dw0 & OSC_INVALID_UUID_ERROR)
- printk(KERN_DEBUG "_OSC invalid UUID\n");
- if (osc_dw0 & OSC_INVALID_REVISION_ERROR)
- printk(KERN_DEBUG "_OSC invalid revision\n");
- if (osc_dw0 & OSC_CAPABILITIES_MASK_ERROR) {
- if (flags & OSC_QUERY_ENABLE)
- goto out_success;
- printk(KERN_DEBUG "_OSC FW not grant req. control\n");
- status = AE_SUPPORT;
- goto out_kfree;
- }
- status = AE_ERROR;
- goto out_kfree;
- }
-out_success:
- if (flags & OSC_QUERY_ENABLE)
- osc_args->query_result =
- *((u32 *)(out_obj->buffer.pointer + 8));
- status = AE_OK;
-
-out_kfree:
- kfree(output.pointer);
- return status;
-}
-
-static acpi_status acpi_query_osc(acpi_handle handle,
- u32 level, void *context, void **retval)
-{
- acpi_status status;
- struct acpi_osc_data *osc_data;
- u32 flags = (unsigned long)context, support_set;
- acpi_handle tmp;
- struct acpi_osc_args osc_args;
-
- status = acpi_get_handle(handle, "_OSC", &tmp);
- if (ACPI_FAILURE(status))
- return status;
-
- osc_data = acpi_get_osc_data(handle);
- if (!osc_data) {
- printk(KERN_ERR "acpi osc data array is full\n");
- return AE_ERROR;
- }
-
- /* do _OSC query for all possible controls */
- support_set = osc_data->support_set | (flags & OSC_SUPPORT_MASKS);
- osc_args.capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
- osc_args.capbuf[OSC_SUPPORT_TYPE] = support_set;
- osc_args.capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
-
- status = acpi_run_osc(handle, &osc_args);
- if (ACPI_SUCCESS(status)) {
- osc_data->support_set = support_set;
- osc_data->query_result = osc_args.query_result;
- osc_data->is_queried = 1;
- }
-
- return status;
-}
-
-/**
- * __pci_osc_support_set - register OS support to Firmware
- * @flags: OS support bits
- * @hid: hardware ID
- *
- * Update OS support fields and doing a _OSC Query to obtain an update
- * from Firmware on supported control bits.
- **/
-acpi_status __pci_osc_support_set(u32 flags, const char *hid)
-{
- if (!(flags & OSC_SUPPORT_MASKS))
- return AE_TYPE;
-
- acpi_get_devices(hid, acpi_query_osc,
- (void *)(unsigned long)flags, NULL);
- return AE_OK;
-}
-
-/**
- * pci_osc_control_set - commit requested control to Firmware
- * @handle: acpi_handle for the target ACPI object
- * @flags: driver's requested control bits
- *
- * Attempt to take control from Firmware on requested control bits.
- **/
-acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
-{
- acpi_status status;
- u32 ctrlset, control_set;
- acpi_handle tmp;
- struct acpi_osc_data *osc_data;
- struct acpi_osc_args osc_args;
-
- status = acpi_get_handle(handle, "_OSC", &tmp);
- if (ACPI_FAILURE(status))
- return status;
-
- osc_data = acpi_get_osc_data(handle);
- if (!osc_data) {
- printk(KERN_ERR "acpi osc data array is full\n");
- return AE_ERROR;
- }
-
- ctrlset = (flags & OSC_CONTROL_MASKS);
- if (!ctrlset)
- return AE_TYPE;
-
- if (osc_data->is_queried &&
- ((osc_data->query_result & ctrlset) != ctrlset))
- return AE_SUPPORT;
-
- control_set = osc_data->control_set | ctrlset;
- osc_args.capbuf[OSC_QUERY_TYPE] = 0;
- osc_args.capbuf[OSC_SUPPORT_TYPE] = osc_data->support_set;
- osc_args.capbuf[OSC_CONTROL_TYPE] = control_set;
- status = acpi_run_osc(handle, &osc_args);
- if (ACPI_SUCCESS(status))
- osc_data->control_set = control_set;
-
- return status;
-}
-EXPORT_SYMBOL(pci_osc_control_set);
-
-#ifdef CONFIG_ACPI_SLEEP
/*
* _SxD returns the D-state with the highest power
* (lowest D-state number) supported in the S-state "x".
* choose highest power _SxD or any lower power
*/
-static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev,
- pm_message_t state)
+static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
{
int acpi_state;
- acpi_state = acpi_pm_device_sleep_state(&pdev->dev,
- device_may_wakeup(&pdev->dev), NULL);
+ acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL);
if (acpi_state < 0)
return PCI_POWER_ERROR;
}
return PCI_POWER_ERROR;
}
-#endif
+
+static bool acpi_pci_power_manageable(struct pci_dev *dev)
+{
+ acpi_handle handle = DEVICE_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)
{
[PCI_D3hot] = ACPI_STATE_D3,
[PCI_D3cold] = ACPI_STATE_D3
};
+ int error = -EINVAL;
- if (!handle)
- return -ENODEV;
/* If the ACPI device has _EJ0, ignore the device */
- if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
- return 0;
+ if (!handle || ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
+ return -ENODEV;
switch (state) {
case PCI_D0:
case PCI_D2:
case PCI_D3hot:
case PCI_D3cold:
- return acpi_bus_set_power(handle, state_conv[state]);
+ error = acpi_bus_set_power(handle, state_conv[state]);
+ }
+
+ if (!error)
+ dev_printk(KERN_INFO, &dev->dev,
+ "power state changed by ACPI to D%d\n", state);
+
+ return error;
+}
+
+static bool acpi_pci_can_wakeup(struct pci_dev *dev)
+{
+ acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+
+ return handle ? acpi_bus_can_wakeup(handle) : false;
+}
+
+static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable)
+{
+ while (bus->parent) {
+ if (!acpi_pm_device_sleep_wake(&bus->self->dev, enable))
+ return;
+ bus = bus->parent;
}
- return -EINVAL;
+
+ /* We have reached the root bus. */
+ if (bus->bridge)
+ acpi_pm_device_sleep_wake(bus->bridge, enable);
}
+static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
+{
+ if (acpi_pci_can_wakeup(dev))
+ return acpi_pm_device_sleep_wake(&dev->dev, enable);
+
+ acpi_pci_propagate_wakeup_enable(dev->bus, enable);
+ return 0;
+}
+
+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,
+};
/* ACPI bus type */
static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
* The string should be the same as root bridge's name
* Please look at 'pci_scan_bus_parented'
*/
- num = sscanf(dev->bus_id, "pci%04x:%02x", &seg, &bus);
+ num = sscanf(dev_name(dev), "pci%04x:%02x", &seg, &bus);
if (num != 2)
return -ENODEV;
*handle = acpi_get_pci_rootbridge_handle(seg, bus);
{
int ret;
- if (acpi_gbl_FADT.boot_flags & BAF_MSI_NOT_SUPPORTED) {
+ 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");
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");
+ pcie_no_aspm();
+ }
+
ret = register_acpi_bus_type(&acpi_pci_bus);
if (ret)
return 0;
-#ifdef CONFIG_ACPI_SLEEP
- platform_pci_choose_state = acpi_pci_choose_state;
-#endif
- platform_pci_set_power_state = acpi_pci_set_power_state;
+ pci_set_platform_pm(&acpi_pci_platform_pm);
return 0;
}
arch_initcall(acpi_pci_init);