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@xxxxxxxxxxxxxxx>
---
drivers/acpi/resource.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index d3aa56674bd4..16d334a1ee25 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -203,6 +203,20 @@ static bool acpi_decode_space(struct resource *res, resource_size_t *offset,
res->start = addr->minimum;
res->end = addr->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 (base->producer_consumer == ACPI_PRODUCER) {
+ res->start += addr->translation_offset;
+ res->end += addr->translation_offset;
+ } else if (addr->translation_offset) {
+ return false;
+ }
+
switch(base->resource_type) {
case ACPI_MEMORY_RANGE:
acpi_dev_memresource_flags(res, len, wp);
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
