[PATCH 0/2] PCI/ACPI: move _OSC code to pci_root.c (v.3)

[PATCH 0/2] PCI/ACPI: move _OSC code to pci_root.c (v.3)

[Kenji Kaneshige]

Hi,

Here are updated version (v.3) of "PCI/ACPI: move _OSC code to
pci_root.c" patches. Patches are

  - [PATCH 1/2] PCI/ACPI: move _OSC code to pci_root.c
  - [PATCH 2/2] PCI/ACPI: rename pci_osc_control_set()

ChangeLog
---------
[v.2 -> v.3]
  - More debug message cleanups
    (Based on the feedback from Alex Chiang)
  - Added Reviewed-by: and Tested-by: from Andrew Patterson

[v.1 -> v.2]
  - Change the debug message.
    [old]: "_OSC FW not grant req. control."
    [new]: "Firmware did not grant requested _OSC control"
    (Based on the feedback from Andrew Patterson and Alex Chiang)

  - Rename pci_osc_control_set() to acpi_pci_osc_control_set() and
    move _OSC related definitions from include/linux/pci-acpi.h to
    include/linux/acpi.h.
    (Based on the feedback from Andrew Patterson)

Thanks,
Kenji Kaneshige

[PATCH 1/2] PCI/ACPI: move _OSC code to pci_root.c

[Kenji Kaneshige]

Move PCI _OSC management code from drivers/pci/pci-acpi.c to
drivers/acpi/pci_root.c. The benefits are

- We no longer need struct osc_data and its management code (contents
  are moved to struct acpi_pci_root). This simplify the code, and we
  no longer care about kmalloc() failure.

- We can make pci_acpi_osc_support() be a static function, which is
  called only from drivers/acpi/pci_root.c.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Reviewed-by: Andrew Patterson <andrew.patterson@hp.com>
Tested-by: Andrew Patterson <andrew.patterson@hp.com>

---
 drivers/acpi/pci_root.c  |  180 ++++++++++++++++++++++++++++++++++++++-
 drivers/pci/pci-acpi.c   |  215 -----------------------------------------------
 include/linux/pci-acpi.h |    1 
 3 files changed, 178 insertions(+), 218 deletions(-)

Index: linux-next/drivers/acpi/pci_root.c
===================================================================
--- linux-next.orig/drivers/acpi/pci_root.c
+++ linux-next/drivers/acpi/pci_root.c
@@ -66,11 +66,18 @@ struct acpi_pci_root {
 	struct acpi_device * device;
 	struct acpi_pci_id id;
 	struct pci_bus *bus;
+
+	u32 osc_support_set;	/* _OSC state of support bits */
+	u32 osc_control_set;	/* _OSC state of control bits */
+	u32 osc_control_qry;	/* the latest _OSC query result */
+
+	u32 osc_queried:1;	/* has _OSC control been queried? */
 };
 
 static LIST_HEAD(acpi_pci_roots);
 
 static struct acpi_pci_driver *sub_driver;
+static DEFINE_MUTEX(osc_lock);
 
 int acpi_pci_register_driver(struct acpi_pci_driver *driver)
 {
@@ -185,6 +192,175 @@ static void acpi_pci_bridge_scan(struct 
 		}
 }
 
+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_pci_run_osc(acpi_handle handle,
+				    const u32 *capbuf, u32 *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 errors;
+
+	/* 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 *)capbuf;
+
+	status = acpi_evaluate_object(handle, "_OSC", &input, &output);
+	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 "_OSC evaluation returned wrong type\n");
+		status = AE_TYPE;
+		goto out_kfree;
+	}
+	/* 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 failed\n");
+		if (errors & OSC_INVALID_UUID_ERROR)
+			printk(KERN_DEBUG "_OSC invalid UUID\n");
+		if (errors & OSC_INVALID_REVISION_ERROR)
+			printk(KERN_DEBUG "_OSC invalid revision\n");
+		if (errors & OSC_CAPABILITIES_MASK_ERROR) {
+			if (capbuf[OSC_QUERY_TYPE] & OSC_QUERY_ENABLE)
+				goto out_success;
+			printk(KERN_DEBUG
+			       "Firmware did not grant requested _OSC control\n");
+			status = AE_SUPPORT;
+			goto out_kfree;
+		}
+		status = AE_ERROR;
+		goto out_kfree;
+	}
+out_success:
+	*retval = *((u32 *)(out_obj->buffer.pointer + 8));
+	status = AE_OK;
+
+out_kfree:
+	kfree(output.pointer);
+	return status;
+}
+
+static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags)
+{
+	acpi_status status;
+	u32 support_set, result, capbuf[3];
+
+	/* do _OSC query for all possible controls */
+	support_set = root->osc_support_set | (flags & OSC_SUPPORT_MASKS);
+	capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
+	capbuf[OSC_SUPPORT_TYPE] = support_set;
+	capbuf[OSC_CONTROL_TYPE] = OSC_CONTROL_MASKS;
+
+	status = acpi_pci_run_osc(root->device->handle, capbuf, &result);
+	if (ACPI_SUCCESS(status)) {
+		root->osc_support_set = support_set;
+		root->osc_control_qry = result;
+		root->osc_queried = 1;
+	}
+	return status;
+}
+
+static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
+{
+	acpi_status status;
+	acpi_handle tmp;
+
+	status = acpi_get_handle(root->device->handle, "_OSC", &tmp);
+	if (ACPI_FAILURE(status))
+		return status;
+	mutex_lock(&osc_lock);
+	status = acpi_pci_query_osc(root, flags);
+	mutex_unlock(&osc_lock);
+	return status;
+}
+
+static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
+{
+	struct acpi_pci_root *root;
+	list_for_each_entry(root, &acpi_pci_roots, node) {
+		if (root->device->handle == handle)
+			return root;
+	}
+	return NULL;
+}
+
+/**
+ * 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 control_req, result, capbuf[3];
+	acpi_handle tmp;
+	struct acpi_pci_root *root;
+
+	status = acpi_get_handle(handle, "_OSC", &tmp);
+	if (ACPI_FAILURE(status))
+		return status;
+
+	control_req = (flags & OSC_CONTROL_MASKS);
+	if (!control_req)
+		return AE_TYPE;
+
+	root = acpi_pci_find_root(handle);
+	if (!root)
+		return AE_NOT_EXIST;
+
+	mutex_lock(&osc_lock);
+	/* No need to evaluate _OSC if the control was already granted. */
+	if ((root->osc_control_set & control_req) == control_req)
+		goto out;
+
+	/* Need to query controls first before requesting them */
+	if (!root->osc_queried) {
+		status = acpi_pci_query_osc(root, root->osc_support_set);
+		if (ACPI_FAILURE(status))
+			goto out;
+	}
+	if ((root->osc_control_qry & control_req) != control_req) {
+		printk(KERN_DEBUG
+		       "Firmware did not grant requested _OSC control\n");
+		status = AE_SUPPORT;
+		goto out;
+	}
+
+	capbuf[OSC_QUERY_TYPE] = 0;
+	capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set;
+	capbuf[OSC_CONTROL_TYPE] = root->osc_control_set | control_req;
+	status = acpi_pci_run_osc(handle, capbuf, &result);
+	if (ACPI_SUCCESS(status))
+		root->osc_control_set = result;
+out:
+	mutex_unlock(&osc_lock);
+	return status;
+}
+EXPORT_SYMBOL(pci_osc_control_set);
+
 static int __devinit acpi_pci_root_add(struct acpi_device *device)
 {
 	int result = 0;
@@ -217,7 +393,7 @@ static int __devinit acpi_pci_root_add(s
 	 * PCI domains, so we indicate this in _OSC support capabilities.
 	 */
 	flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT;
-	pci_acpi_osc_support(device->handle, flags);
+	acpi_pci_osc_support(root, flags);
 
 	/* 
 	 * Segment
@@ -353,7 +529,7 @@ static int __devinit acpi_pci_root_add(s
 	if (pci_msi_enabled())
 		flags |= OSC_MSI_SUPPORT;
 	if (flags != base_flags)
-		pci_acpi_osc_support(device->handle, flags);
+		acpi_pci_osc_support(root, flags);
 
       end:
 	if (result) {
Index: linux-next/drivers/pci/pci-acpi.c
===================================================================
--- linux-next.orig/drivers/pci/pci-acpi.c
+++ linux-next/drivers/pci/pci-acpi.c
@@ -18,221 +18,6 @@
 #include <linux/pci-acpi.h>
 #include "pci.h"
 
-struct acpi_osc_data {
-	acpi_handle handle;
-	u32 support_set;
-	u32 control_set;
-	u32 control_query;
-	int is_queried;
-	struct list_head sibiling;
-};
-static LIST_HEAD(acpi_osc_data_list);
-
-struct acpi_osc_args {
-	u32 capbuf[3];
-};
-
-static DEFINE_MUTEX(pci_acpi_lock);
-
-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, u32 *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 errors, 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;
-
-	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;
-	}
-	/* 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 (errors & OSC_INVALID_UUID_ERROR)
-			printk(KERN_DEBUG "_OSC invalid UUID\n"); 
-		if (errors & OSC_INVALID_REVISION_ERROR)
-			printk(KERN_DEBUG "_OSC invalid revision\n"); 
-		if (errors & 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:
-	*retval = *((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)
-{
-	acpi_status status;
-	u32 support_set, result;
-	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, &result);
-	if (ACPI_SUCCESS(status)) {
-		osc_data->support_set = support_set;
-		osc_data->control_query = result;
-		osc_data->is_queried = 1;
-	}
-
-	return status;
-}
-
-/*
- * pci_acpi_osc_support: Invoke _OSC indicating support for the given feature
- * @flags: Bitmask of flags to support
- *
- * See the ACPI spec for the definition of the flags
- */
-int pci_acpi_osc_support(acpi_handle handle, u32 flags)
-{
-	acpi_status status;
-	acpi_handle tmp;
-	struct acpi_osc_data *osc_data;
-	int rc = 0;
-
-	status = acpi_get_handle(handle, "_OSC", &tmp);
-	if (ACPI_FAILURE(status))
-		return -ENOTTY;
-
-	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");
-		rc = -ENOMEM;
-		goto out;
-	}
-
-	__acpi_query_osc(flags, osc_data);
-out:
-	mutex_unlock(&pci_acpi_lock);
-	return rc;
-}
-
-/**
- * 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 control_req, 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;
-	}
-
-	control_req = (flags & OSC_CONTROL_MASKS);
-	if (!control_req) {
-		status = AE_TYPE;
-		goto out;
-	}
-
-	/* No need to evaluate _OSC if the control was already granted. */
-	if ((osc_data->control_set & control_req) == control_req)
-		goto out;
-
-	if (!osc_data->is_queried) {
-		status = __acpi_query_osc(osc_data->support_set, osc_data);
-		if (ACPI_FAILURE(status))
-			goto out;
-	}
-
-	if ((osc_data->control_query & control_req) != control_req) {
-		status = AE_SUPPORT;
-		goto out;
-	}
-
-	control_set = osc_data->control_set | control_req;
-	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, &result);
-	if (ACPI_SUCCESS(status))
-		osc_data->control_set = result;
-out:
-	mutex_unlock(&pci_acpi_lock);
-	return status;
-}
-EXPORT_SYMBOL(pci_osc_control_set);
-
 /*
  * _SxD returns the D-state with the highest power
  * (lowest D-state number) supported in the S-state "x".
Index: linux-next/include/linux/pci-acpi.h
===================================================================
--- linux-next.orig/include/linux/pci-acpi.h
+++ linux-next/include/linux/pci-acpi.h
@@ -50,7 +50,6 @@
 
 #ifdef CONFIG_ACPI
 extern acpi_status pci_osc_control_set(acpi_handle handle, u32 flags);
-int pci_acpi_osc_support(acpi_handle handle, u32 flags);
 static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
 {
 	/* Find root host bridge */

[PATCH 2/2] PCI/ACPI: rename pci_osc_control_set()

[Kenji Kaneshige]

- Rename pci_osc_control_set() to acpi_pci_osc_control_set() according
  to the other API names in drivers/acpi/pci_root.c.

- Move _OSC related definitions to include/linux/acpi.h because _OSC
  related API is implemented in drivers/acpi/pci_root.c now.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Reviewed-by: Andrew Patterson <andrew.patterson@hp.com>
Tested-by: Andrew Patterson <andrew.patterson@hp.com>

---
 drivers/acpi/pci_root.c            |    6 ++--
 drivers/pci/hotplug/acpi_pcihp.c   |    5 +---
 drivers/pci/pcie/aer/aerdrv_acpi.c |    2 -
 include/linux/acpi.h               |   34 +++++++++++++++++++++++++++
 include/linux/pci-acpi.h           |   45 -------------------------------------
 5 files changed, 40 insertions(+), 52 deletions(-)

Index: linux-next/drivers/acpi/pci_root.c
===================================================================
--- linux-next.orig/drivers/acpi/pci_root.c
+++ linux-next/drivers/acpi/pci_root.c
@@ -306,13 +306,13 @@ static struct acpi_pci_root *acpi_pci_fi
 }
 
 /**
- * pci_osc_control_set - commit requested control to Firmware
+ * acpi_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 acpi_pci_osc_control_set(acpi_handle handle, u32 flags)
 {
 	acpi_status status;
 	u32 control_req, result, capbuf[3];
@@ -359,7 +359,7 @@ out:
 	mutex_unlock(&osc_lock);
 	return status;
 }
-EXPORT_SYMBOL(pci_osc_control_set);
+EXPORT_SYMBOL(acpi_pci_osc_control_set);
 
 static int __devinit acpi_pci_root_add(struct acpi_device *device)
 {
Index: linux-next/include/linux/pci-acpi.h
===================================================================
--- linux-next.orig/include/linux/pci-acpi.h
+++ linux-next/include/linux/pci-acpi.h
@@ -10,46 +10,7 @@
 
 #include <linux/acpi.h>
 
-#define OSC_QUERY_TYPE			0
-#define OSC_SUPPORT_TYPE 		1
-#define OSC_CONTROL_TYPE		2
-#define OSC_SUPPORT_MASKS		0x1f
-
-/*
- * _OSC DW0 Definition 
- */
-#define OSC_QUERY_ENABLE		1
-#define OSC_REQUEST_ERROR		2
-#define OSC_INVALID_UUID_ERROR		4
-#define OSC_INVALID_REVISION_ERROR	8
-#define OSC_CAPABILITIES_MASK_ERROR	16
-
-/*
- * _OSC DW1 Definition (OS Support Fields)
- */
-#define OSC_EXT_PCI_CONFIG_SUPPORT		1
-#define OSC_ACTIVE_STATE_PWR_SUPPORT 		2
-#define OSC_CLOCK_PWR_CAPABILITY_SUPPORT	4
-#define OSC_PCI_SEGMENT_GROUPS_SUPPORT		8
-#define OSC_MSI_SUPPORT				16
-
-/*
- * _OSC DW1 Definition (OS Control Fields)
- */
-#define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL	1
-#define OSC_SHPC_NATIVE_HP_CONTROL 		2
-#define OSC_PCI_EXPRESS_PME_CONTROL		4
-#define OSC_PCI_EXPRESS_AER_CONTROL		8
-#define OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL	16
-
-#define OSC_CONTROL_MASKS 	(OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | 	\
-				OSC_SHPC_NATIVE_HP_CONTROL | 		\
-				OSC_PCI_EXPRESS_PME_CONTROL |		\
-				OSC_PCI_EXPRESS_AER_CONTROL |		\
-				OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL)
-
 #ifdef CONFIG_ACPI
-extern acpi_status pci_osc_control_set(acpi_handle handle, u32 flags);
 static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
 {
 	/* Find root host bridge */
@@ -69,12 +30,6 @@ static inline acpi_handle acpi_pci_get_b
 	return acpi_get_pci_rootbridge_handle(seg, busnr);
 }
 #else
-#if !defined(AE_ERROR)
-typedef u32 		acpi_status;
-#define AE_ERROR      	(acpi_status) (0x0001)
-#endif    
-static inline acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
-{return AE_ERROR;}
 static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
 { return NULL; }
 #endif
Index: linux-next/include/linux/acpi.h
===================================================================
--- linux-next.orig/include/linux/acpi.h
+++ linux-next/include/linux/acpi.h
@@ -256,6 +256,40 @@ void __init acpi_no_s4_hw_signature(void
 void __init acpi_old_suspend_ordering(void);
 void __init acpi_s4_no_nvs(void);
 #endif /* CONFIG_PM_SLEEP */
+
+#define OSC_QUERY_TYPE			0
+#define OSC_SUPPORT_TYPE 		1
+#define OSC_CONTROL_TYPE		2
+#define OSC_SUPPORT_MASKS		0x1f
+
+/* _OSC DW0 Definition */
+#define OSC_QUERY_ENABLE		1
+#define OSC_REQUEST_ERROR		2
+#define OSC_INVALID_UUID_ERROR		4
+#define OSC_INVALID_REVISION_ERROR	8
+#define OSC_CAPABILITIES_MASK_ERROR	16
+
+/* _OSC DW1 Definition (OS Support Fields) */
+#define OSC_EXT_PCI_CONFIG_SUPPORT		1
+#define OSC_ACTIVE_STATE_PWR_SUPPORT 		2
+#define OSC_CLOCK_PWR_CAPABILITY_SUPPORT	4
+#define OSC_PCI_SEGMENT_GROUPS_SUPPORT		8
+#define OSC_MSI_SUPPORT				16
+
+/* _OSC DW1 Definition (OS Control Fields) */
+#define OSC_PCI_EXPRESS_NATIVE_HP_CONTROL	1
+#define OSC_SHPC_NATIVE_HP_CONTROL 		2
+#define OSC_PCI_EXPRESS_PME_CONTROL		4
+#define OSC_PCI_EXPRESS_AER_CONTROL		8
+#define OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL	16
+
+#define OSC_CONTROL_MASKS 	(OSC_PCI_EXPRESS_NATIVE_HP_CONTROL | 	\
+				OSC_SHPC_NATIVE_HP_CONTROL | 		\
+				OSC_PCI_EXPRESS_PME_CONTROL |		\
+				OSC_PCI_EXPRESS_AER_CONTROL |		\
+				OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL)
+
+extern acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags);
 #else	/* CONFIG_ACPI */
 
 static inline int early_acpi_boot_init(void)
Index: linux-next/drivers/pci/hotplug/acpi_pcihp.c
===================================================================
--- linux-next.orig/drivers/pci/hotplug/acpi_pcihp.c
+++ linux-next/drivers/pci/hotplug/acpi_pcihp.c
@@ -30,9 +30,8 @@
 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/pci_hotplug.h>
+#include <linux/acpi.h>
 #include <linux/pci-acpi.h>
-#include <acpi/acpi.h>
-#include <acpi/acpi_bus.h>
 
 #define MY_NAME	"acpi_pcihp"
 
@@ -408,7 +407,7 @@ int acpi_get_hp_hw_control_from_firmware
 		acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
 		dbg("Trying to get hotplug control for %s\n",
 				(char *)string.pointer);
-		status = pci_osc_control_set(handle, flags);
+		status = acpi_pci_osc_control_set(handle, flags);
 		if (ACPI_SUCCESS(status))
 			goto got_one;
 		kfree(string.pointer);
Index: linux-next/drivers/pci/pcie/aer/aerdrv_acpi.c
===================================================================
--- linux-next.orig/drivers/pci/pcie/aer/aerdrv_acpi.c
+++ linux-next/drivers/pci/pcie/aer/aerdrv_acpi.c
@@ -38,7 +38,7 @@ int aer_osc_setup(struct pcie_device *pc
 
 	handle = acpi_find_root_bridge_handle(pdev);
 	if (handle) {
-		status = pci_osc_control_set(handle,
+		status = acpi_pci_osc_control_set(handle,
 					OSC_PCI_EXPRESS_AER_CONTROL |
 					OSC_PCI_EXPRESS_CAP_STRUCTURE_CONTROL);
 	}

Re: [PATCH 1/2] PCI/ACPI: move _OSC code to pci_root.c

[Alex Chiang]

* Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>:
> Move PCI _OSC management code from drivers/pci/pci-acpi.c to
> drivers/acpi/pci_root.c. The benefits are
> 
> - We no longer need struct osc_data and its management code (contents
>   are moved to struct acpi_pci_root). This simplify the code, and we
>   no longer care about kmalloc() failure.
> 
> - We can make pci_acpi_osc_support() be a static function, which is
>   called only from drivers/acpi/pci_root.c.
> 
> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
> Reviewed-by: Andrew Patterson <andrew.patterson@hp.com>
> Tested-by: Andrew Patterson <andrew.patterson@hp.com>

Acked-by: Alex Chiang <achiang@hp.com>

Thanks.

Re: [PATCH 1/2] PCI/ACPI: move _OSC code to pci_root.c

[Jesse Barnes]

On Sunday, February 8, 2009 10:59 pm Kenji Kaneshige wrote:
> Move PCI _OSC management code from drivers/pci/pci-acpi.c to
> drivers/acpi/pci_root.c. The benefits are
>
> - We no longer need struct osc_data and its management code (contents
>   are moved to struct acpi_pci_root). This simplify the code, and we
>   no longer care about kmalloc() failure.
>
> - We can make pci_acpi_osc_support() be a static function, which is
>   called only from drivers/acpi/pci_root.c.
>
> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
> Reviewed-by: Andrew Patterson <andrew.patterson@hp.com>
> Tested-by: Andrew Patterson <andrew.patterson@hp.com>

Applied this series, thanks Kenji-san, Andrew & Alex.

-- 
Jesse Barnes, Intel Open Source Technology Center