Merge branch 'linus' into xen-64bit

1 files changed, 126 insertions, 151 deletions

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 9d6fc8e6285d..7764768b6a0e 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -21,12 +21,19 @@
 
 struct acpi_osc_data {
         acpi_handle handle;
-        u32 ctrlset_buf[3];
-        u32 global_ctrlsets;
+        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;
@@ -44,42 +51,18 @@ static struct acpi_osc_data *acpi_get_osc_data(acpi_handle handle)
         return data;
 }
 
-static u8 OSC_UUID[16] = {0x5B, 0x4D, 0xDB, 0x33, 0xF7, 0x1F, 0x1C, 0x40, 0x96, 0x57, 0x74, 0x41, 0xC0, 0x3D, 0xD7, 0x66};
+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_query_osc (
-        acpi_handle     handle,
-        u32             level,
-        void            *context,
-        void            **retval )
+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;
-        acpi_status *ret_status = (acpi_status *)retval;
-        struct acpi_osc_data *osc_data;
-        u32 flags = (unsigned long)context, temp;
-        acpi_handle tmp;
-
-        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;
-        }
-
-        osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] |= (flags & OSC_SUPPORT_MASKS);
-
-        /* do _OSC query for all possible controls */
-        temp = osc_data->ctrlset_buf[OSC_CONTROL_TYPE];
-        osc_data->ctrlset_buf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
-        osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
+        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;
@@ -93,20 +76,19 @@ acpi_query_osc (
         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_data->ctrlset_buf;
+        in_params[3].buffer.pointer     = (u8 *)osc_args->capbuf;
 
         status = acpi_evaluate_object(handle, "_OSC", &input, &output);
         if (ACPI_FAILURE(status))
-                goto out_nofree;
-        out_obj = output.pointer;
+                return status;
 
+        out_obj = output.pointer;
         if (out_obj->type != ACPI_TYPE_BUFFER) {
-                printk(KERN_DEBUG  
-                        "Evaluate _OSC returns wrong type\n");
+                printk(KERN_DEBUG "Evaluate _OSC returns wrong type\n");
                 status = AE_TYPE;
-                goto query_osc_out;
+                goto out_kfree;
         }
-        osc_dw0 = *((u32 *) out_obj->buffer.pointer);
+        osc_dw0 = *((u32 *)out_obj->buffer.pointer);
         if (osc_dw0) {
                 if (osc_dw0 & OSC_REQUEST_ERROR)
                         printk(KERN_DEBUG "_OSC request fails\n"); 
@@ -115,93 +97,58 @@ acpi_query_osc (
                 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 */
-                        osc_data->global_ctrlsets =
-                                *((u32 *)(out_obj->buffer.pointer + 8));
-                        status = AE_OK;
-                        goto query_osc_out;
+                        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 query_osc_out;
+                goto out_kfree;
         }
-
-        /* Update Global Control Set */
-        osc_data->global_ctrlsets = *((u32 *)(out_obj->buffer.pointer + 8));
+out_success:
+        if (flags & OSC_QUERY_ENABLE)
+                osc_args->query_result =
+                        *((u32 *)(out_obj->buffer.pointer + 8));
         status = AE_OK;
 
-query_osc_out:
+out_kfree:
         kfree(output.pointer);
-out_nofree:
-        *ret_status = status;
-
-        osc_data->ctrlset_buf[OSC_QUERY_TYPE] = !OSC_QUERY_ENABLE;
-        osc_data->ctrlset_buf[OSC_CONTROL_TYPE] = temp;
-        if (ACPI_FAILURE(status)) {
-                /* no osc support at all */
-                osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] = 0;
-        }
-
         return status;
 }
 
-
-static acpi_status  
-acpi_run_osc (
-        acpi_handle     handle,
-        void            *context)
+static acpi_status acpi_query_osc(acpi_handle handle,
+                                  u32 level, void *context, void **retval)
 {
-        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;
-
-        /* 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;
+        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_evaluate_object(handle, "_OSC", &input, &output);
-        if (ACPI_FAILURE (status))
+        status = acpi_get_handle(handle, "_OSC", &tmp);
+        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 run_osc_out;
+        osc_data = acpi_get_osc_data(handle);
+        if (!osc_data) {
+                printk(KERN_ERR "acpi osc data array is full\n");
+                return AE_ERROR;
         }
-        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) {
-                        printk(KERN_DEBUG "_OSC FW not grant req. control\n");
-                        status = AE_SUPPORT;
-                        goto run_osc_out;
-                }
-                status = AE_ERROR;
-                goto run_osc_out;
+
+        /* 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;
         }
-        status = AE_OK;
 
-run_osc_out:
-        kfree(output.pointer);
         return status;
 }
 
@@ -215,15 +162,11 @@ run_osc_out:
  **/
 acpi_status __pci_osc_support_set(u32 flags, const char *hid)
 {
-        acpi_status retval = AE_NOT_FOUND;
-
-        if (!(flags & OSC_SUPPORT_MASKS)) {
+        if (!(flags & OSC_SUPPORT_MASKS))
                 return AE_TYPE;
-        }
-        acpi_get_devices(hid,
-                        acpi_query_osc,
-                        (void *)(unsigned long)flags,
-                        (void **) &retval );
+
+        acpi_get_devices(hid, acpi_query_osc,
+                         (void *)(unsigned long)flags, NULL);
         return AE_OK;
 }
 
@@ -236,10 +179,11 @@ acpi_status __pci_osc_support_set(u32 flags, const char *hid)
  **/
 acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
 {
-        acpi_status     status;
-        u32             ctrlset;
+        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))
@@ -252,24 +196,25 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
         }
 
         ctrlset = (flags & OSC_CONTROL_MASKS);
-        if (!ctrlset) {
+        if (!ctrlset)
                 return AE_TYPE;
-        }
-        if (osc_data->ctrlset_buf[OSC_SUPPORT_TYPE] &&
-                ((osc_data->global_ctrlsets & ctrlset) != ctrlset)) {
+
+        if (osc_data->is_queried &&
+            ((osc_data->query_result & ctrlset) != ctrlset))
                 return AE_SUPPORT;
-        }
-        osc_data->ctrlset_buf[OSC_CONTROL_TYPE] |= ctrlset;
-        status = acpi_run_osc(handle, osc_data->ctrlset_buf);
-        if (ACPI_FAILURE (status)) {
-                osc_data->ctrlset_buf[OSC_CONTROL_TYPE] &= ~ctrlset;
-        }
-        
+
+        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".
@@ -293,13 +238,11 @@ EXPORT_SYMBOL(pci_osc_control_set);
  *      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;
 
@@ -315,7 +258,13 @@ static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev,
         }
         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)
 {
@@ -328,12 +277,11 @@ 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:
@@ -341,11 +289,41 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
         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]);
         }
-        return -EINVAL;
+
+        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 acpi_pci_find_device(struct device *dev, acpi_handle *handle)
@@ -397,10 +375,7 @@ static int __init acpi_pci_init(void)
         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);