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Commit 62d1141f authored by Jiang Liu's avatar Jiang Liu Committed by Rafael J. Wysocki
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ACPI: Introduce helper function acpi_dev_filter_resource_type() 



Introduce helper function acpi_dev_filter_resource_type(), which may
be used by acpi_dev_get_resources() to filer out resource based on
resource type.

Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 93286f47

drivers/acpi/resource.c

+55 −0
Original line number Diff line number Diff line
@@ -569,3 +569,58 @@ int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, 
	return c.count;

}

EXPORT_SYMBOL_GPL(acpi_dev_get_resources);



/**

 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource

 *				   types

 * @ares: Input ACPI resource object.

 * @types: Valid resource types of IORESOURCE_XXX

 *

 * This is a hepler function to support acpi_dev_get_resources(), which filters

 * ACPI resource objects according to resource types.

 */

int acpi_dev_filter_resource_type(struct acpi_resource *ares,

				  unsigned long types)

{

	unsigned long type = 0;



	switch (ares->type) {

	case ACPI_RESOURCE_TYPE_MEMORY24:

	case ACPI_RESOURCE_TYPE_MEMORY32:

	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:

		type = IORESOURCE_MEM;

		break;

	case ACPI_RESOURCE_TYPE_IO:

	case ACPI_RESOURCE_TYPE_FIXED_IO:

		type = IORESOURCE_IO;

		break;

	case ACPI_RESOURCE_TYPE_IRQ:

	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:

		type = IORESOURCE_IRQ;

		break;

	case ACPI_RESOURCE_TYPE_DMA:

	case ACPI_RESOURCE_TYPE_FIXED_DMA:

		type = IORESOURCE_DMA;

		break;

	case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:

		type = IORESOURCE_REG;

		break;

	case ACPI_RESOURCE_TYPE_ADDRESS16:

	case ACPI_RESOURCE_TYPE_ADDRESS32:

	case ACPI_RESOURCE_TYPE_ADDRESS64:

	case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:

		if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)

			type = IORESOURCE_MEM;

		else if (ares->data.address.resource_type == ACPI_IO_RANGE)

			type = IORESOURCE_IO;

		else if (ares->data.address.resource_type ==

			 ACPI_BUS_NUMBER_RANGE)

			type = IORESOURCE_BUS;

		break;

	default:

		break;

	}



	return (type & types) ? 0 : 1;

}

EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);

include/linux/acpi.h

+8 −0
Original line number Diff line number Diff line
@@ -310,6 +310,14 @@ void acpi_dev_free_resource_list(struct list_head *list); 
int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,

			   int (*preproc)(struct acpi_resource *, void *),

			   void *preproc_data);

int acpi_dev_filter_resource_type(struct acpi_resource *ares,

				  unsigned long types);



static inline int acpi_dev_filter_resource_type_cb(struct acpi_resource *ares,

						   void *arg)

{

	return acpi_dev_filter_resource_type(ares, (unsigned long)arg);

}



int acpi_check_resource_conflict(const struct resource *res);