#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 <linux/pci-acpi.h>
#include "pci.h"
-static u32 ctrlset_buf[3] = {0, 0, 0};
-static u32 global_ctrlsets = 0;
-static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
+struct acpi_osc_data {
+ acpi_handle handle;
+ u32 support_set;
+ u32 control_set;
+ struct list_head sibiling;
+};
+static LIST_HEAD(acpi_osc_data_list);
+
+struct acpi_osc_args {
+ u32 capbuf[3];
+ u32 ctrl_result;
+};
-static acpi_status
-acpi_query_osc (
- acpi_handle handle,
- u32 level,
- void *context,
- void **retval )
+static DEFINE_MUTEX(pci_acpi_lock);
+
+static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
{
- acpi_status status;
- struct acpi_object_list input;
- union acpi_object in_params[4];
- struct acpi_buffer output;
- union acpi_object out_obj;
- u32 osc_dw0;
-
- /* Setting up output buffer */
- output.length = sizeof(out_obj) + 3*sizeof(u32);
- output.pointer = &out_obj;
-
- /* 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 *)context;
+ struct acpi_osc_data *data;
- status = acpi_evaluate_object(handle, "_OSC", &input, &output);
- if (ACPI_FAILURE (status)) {
- printk(KERN_DEBUG
- "Evaluate _OSC Set fails. Status = 0x%04x\n", status);
- return status;
- }
- if (out_obj.type != ACPI_TYPE_BUFFER) {
- printk(KERN_DEBUG
- "Evaluate _OSC returns wrong type\n");
- return AE_TYPE;
- }
- 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) {
- /* Update Global Control Set */
- global_ctrlsets = *((u32 *)(out_obj.buffer.pointer+8));
- return AE_OK;
- }
- return AE_ERROR;
+ list_for_each_entry(data, &acpi_osc_data_list, sibiling) {
+ if (data->handle == handle)
+ return data;
}
-
- /* Update Global Control Set */
- global_ctrlsets = *((u32 *)(out_obj.buffer.pointer + 8));
- return AE_OK;
+ 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,
- void *context)
+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;
- union acpi_object out_obj;
- u32 osc_dw0;
-
- /* Setting up output buffer */
- output.length = sizeof(out_obj) + 3*sizeof(u32);
- output.pointer = &out_obj;
-
+ 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 errors, flags = osc_args->capbuf[OSC_QUERY_TYPE];
+
/* Setting up input parameters */
input.count = 4;
input.pointer = in_params;
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 *)context;
+ in_params[3].buffer.pointer = (u8 *)osc_args->capbuf;
status = acpi_evaluate_object(handle, "_OSC", &input, &output);
- if (ACPI_FAILURE (status)) {
- printk(KERN_DEBUG
- "Evaluate _OSC Set fails. Status = 0x%04x\n", status);
+ if (ACPI_FAILURE(status))
return status;
+
+ if (!output.length)
+ return AE_NULL_OBJECT;
+
+ 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;
}
- if (out_obj.type != ACPI_TYPE_BUFFER) {
- printk(KERN_DEBUG
- "Evaluate _OSC returns wrong type\n");
- return AE_TYPE;
- }
- osc_dw0 = *((u32 *) out_obj.buffer.pointer);
- if (osc_dw0) {
- if (osc_dw0 & OSC_REQUEST_ERROR)
+ /* Need to ignore the bit0 in result code */
+ errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
+ if (errors) {
+ if (errors & OSC_REQUEST_ERROR)
printk(KERN_DEBUG "_OSC request fails\n");
- if (osc_dw0 & OSC_INVALID_UUID_ERROR)
+ if (errors & OSC_INVALID_UUID_ERROR)
printk(KERN_DEBUG "_OSC invalid UUID\n");
- if (osc_dw0 & OSC_INVALID_REVISION_ERROR)
+ if (errors & OSC_INVALID_REVISION_ERROR)
printk(KERN_DEBUG "_OSC invalid revision\n");
- if (osc_dw0 & OSC_CAPABILITIES_MASK_ERROR) {
+ if (errors & OSC_CAPABILITIES_MASK_ERROR) {
+ if (flags & OSC_QUERY_ENABLE)
+ goto out_success;
printk(KERN_DEBUG "_OSC FW not grant req. control\n");
- return AE_SUPPORT;
+ status = AE_SUPPORT;
+ goto out_kfree;
}
- return AE_ERROR;
+ status = AE_ERROR;
+ goto out_kfree;
+ }
+out_success:
+ osc_args->ctrl_result =
+ *((u32 *)(out_obj->buffer.pointer + 8));
+ status = AE_OK;
+
+out_kfree:
+ kfree(output.pointer);
+ return status;
+}
+
+static acpi_status __acpi_query_osc(u32 flags, struct acpi_osc_data *osc_data,
+ u32 *result)
+{
+ acpi_status status;
+ u32 support_set;
+ struct acpi_osc_args osc_args;
+
+ /* 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(osc_data->handle, &osc_args);
+ if (ACPI_SUCCESS(status)) {
+ osc_data->support_set = support_set;
+ *result = osc_args.ctrl_result;
+ }
+
+ 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, dummy;
+ acpi_handle tmp;
+
+ status = acpi_get_handle(handle, "_OSC", &tmp);
+ if (ACPI_FAILURE(status))
+ return AE_OK;
+
+ mutex_lock(&pci_acpi_lock);
+ osc_data = acpi_get_osc_data(handle);
+ if (!osc_data) {
+ printk(KERN_ERR "acpi osc data array is full\n");
+ goto out;
}
+
+ __acpi_query_osc(flags, osc_data, &dummy);
+out:
+ mutex_unlock(&pci_acpi_lock);
return AE_OK;
}
/**
- * pci_osc_support_set - register OS support to Firmware
+ * __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)
+acpi_status __pci_osc_support_set(u32 flags, const char *hid)
{
- u32 temp;
-
- if (!(flags & OSC_SUPPORT_MASKS)) {
+ if (!(flags & OSC_SUPPORT_MASKS))
return AE_TYPE;
- }
- ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS);
- /* do _OSC query for all possible controls */
- temp = ctrlset_buf[OSC_CONTROL_TYPE];
- ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
- ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
- acpi_get_devices ( PCI_ROOT_HID_STRING,
- acpi_query_osc,
- ctrlset_buf,
- NULL );
- ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
- ctrlset_buf[OSC_CONTROL_TYPE] = temp;
+ acpi_get_devices(hid, acpi_query_osc,
+ (void *)(unsigned long)flags, NULL);
return AE_OK;
}
-EXPORT_SYMBOL(pci_osc_support_set);
/**
* pci_osc_control_set - commit requested control to Firmware
**/
acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
{
- acpi_status status;
- u32 ctrlset;
+ acpi_status status;
+ u32 ctrlset, control_set, result;
+ 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;
+
+ mutex_lock(&pci_acpi_lock);
+ osc_data = acpi_get_osc_data(handle);
+ if (!osc_data) {
+ printk(KERN_ERR "acpi osc data array is full\n");
+ status = AE_ERROR;
+ goto out;
+ }
ctrlset = (flags & OSC_CONTROL_MASKS);
if (!ctrlset) {
- return AE_TYPE;
+ status = AE_TYPE;
+ goto out;
}
- if (ctrlset_buf[OSC_SUPPORT_TYPE] &&
- ((global_ctrlsets & ctrlset) != ctrlset)) {
- return AE_SUPPORT;
- }
- ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
- status = acpi_run_osc(handle, ctrlset_buf);
- if (ACPI_FAILURE (status)) {
- ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
+
+ status = __acpi_query_osc(osc_data->support_set, osc_data, &result);
+ if (ACPI_FAILURE(status))
+ goto out;
+
+ if ((result & ctrlset) != ctrlset) {
+ status = AE_SUPPORT;
+ goto out;
}
-
+
+ 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;
+out:
+ mutex_unlock(&pci_acpi_lock);
return status;
}
EXPORT_SYMBOL(pci_osc_control_set);
* choose from highest power _SxD to lowest power _SxW
* else // no _PRW at S-state x
* choose highest power _SxD or any lower power
- *
- * currently we simply return _SxD, if present.
*/
-static int 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, NULL);
+ if (acpi_state < 0)
+ return PCI_POWER_ERROR;
+
+ switch (acpi_state) {
+ case ACPI_STATE_D0:
+ return PCI_D0;
+ case ACPI_STATE_D1:
+ return PCI_D1;
+ case ACPI_STATE_D2:
+ return PCI_D2;
+ case ACPI_STATE_D3:
+ return PCI_D3hot;
+ }
+ return PCI_POWER_ERROR;
+}
+
+static bool acpi_pci_power_manageable(struct pci_dev *dev)
{
- /* TBD */
+ acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
- return -ENODEV;
+ 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);
- static int state_conv[] = {
- [0] = 0,
- [1] = 1,
- [2] = 2,
- [3] = 3,
- [4] = 3
+ acpi_handle tmp;
+ 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
};
- int acpi_state = state_conv[(int __force) state];
+ int error = -EINVAL;
- if (!handle)
+ /* If the ACPI device has _EJ0, ignore the device */
+ if (!handle || ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
return -ENODEV;
- return acpi_bus_set_power(handle, acpi_state);
+
+ switch (state) {
+ case PCI_D0:
+ case PCI_D1:
+ case PCI_D2:
+ case PCI_D3hot:
+ case PCI_D3cold:
+ 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 int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
+{
+ int error = acpi_pm_device_sleep_wake(&dev->dev, enable);
+
+ if (!error)
+ dev_printk(KERN_INFO, &dev->dev,
+ "wake-up capability %s by ACPI\n",
+ enable ? "enabled" : "disabled");
+ return error;
+}
+
+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 pci_acpi_find_device(struct device *dev, acpi_handle *handle)
+static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
{
struct pci_dev * pci_dev;
acpi_integer addr;
return 0;
}
-static int pci_acpi_find_root_bridge(struct device *dev, acpi_handle *handle)
+static int acpi_pci_find_root_bridge(struct device *dev, acpi_handle *handle)
{
int num;
unsigned int seg, bus;
return 0;
}
-static struct acpi_bus_type pci_acpi_bus = {
+static struct acpi_bus_type acpi_pci_bus = {
.bus = &pci_bus_type,
- .find_device = pci_acpi_find_device,
- .find_bridge = pci_acpi_find_root_bridge,
+ .find_device = acpi_pci_find_device,
+ .find_bridge = acpi_pci_find_root_bridge,
};
-static int __init pci_acpi_init(void)
+static int __init acpi_pci_init(void)
{
int ret;
- ret = register_acpi_bus_type(&pci_acpi_bus);
+ if (acpi_gbl_FADT.boot_flags & BAF_MSI_NOT_SUPPORTED) {
+ 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 & BAF_PCIE_ASPM_CONTROL) {
+ 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;
- platform_pci_choose_state = acpi_pci_choose_state;
- platform_pci_set_power_state = acpi_pci_set_power_state;
+ pci_set_platform_pm(&acpi_pci_platform_pm);
return 0;
}
-arch_initcall(pci_acpi_init);
+arch_initcall(acpi_pci_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff