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Commit 2ea3d266 authored by Jiang Liu's avatar Jiang Liu Committed by Rafael J. Wysocki
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ACPI: Translate resource into master side address for bridge window resources 



Add translation_offset into the result address for bridge window
resources to form the master side address.

Currently acpi_dev_resource_{ext_}address_space() are only used for
devices instead of bridges, so it won't break current users. Later
it will be used to support PCI host bridge drivers.

Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent a49170b5

drivers/acpi/resource.c

+15 −0
Original line number Diff line number Diff line
@@ -205,6 +205,21 @@ static bool acpi_decode_space(struct resource_win *win, 
	res->start = attr->minimum;

	res->end = attr->maximum;



	/*

	 * For bridges that translate addresses across the bridge,

	 * translation_offset is the offset that must be added to the

	 * address on the secondary side to obtain the address on the

	 * primary side. Non-bridge devices must list 0 for all Address

	 * Translation offset bits.

	 */

	if (addr->producer_consumer == ACPI_PRODUCER) {

		res->start += attr->translation_offset;

		res->end += attr->translation_offset;

	} else if (attr->translation_offset) {

		pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",

			 attr->translation_offset);

	}



	switch (addr->resource_type) {

	case ACPI_MEMORY_RANGE:

		acpi_dev_memresource_flags(res, len, wp);