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ACPI: Translate resource into master side address for bridge window resources

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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: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jiang Liu 2015-02-02 10:42:59 +08:00 committed by Rafael J. Wysocki
parent a49170b552
commit 2ea3d266ba
1 changed files with 15 additions and 0 deletions
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15
drivers/acpi/resource.c
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@ -205,6 +205,21 @@ static bool acpi_decode_space(struct resource_win *win,
res->start = attr->minimum; res->start = attr->minimum;
res->end = attr->maximum; 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) { switch (addr->resource_type) {
case ACPI_MEMORY_RANGE: case ACPI_MEMORY_RANGE:
acpi_dev_memresource_flags(res, len, wp); acpi_dev_memresource_flags(res, len, wp);