From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiang Liu Subject: [RFC Patch 14/19] ACPI: Translate resource into master side address for bridge window resources Date: Thu, 8 Jan 2015 10:33:01 +0800 Message-ID: <1420684386-5975-15-git-send-email-jiang.liu@linux.intel.com> References: <1420684386-5975-1-git-send-email-jiang.liu@linux.intel.com> Return-path: Received: from mga09.intel.com ([134.134.136.24]:27186 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756015AbbAHCbE (ORCPT ); Wed, 7 Jan 2015 21:31:04 -0500 In-Reply-To: <1420684386-5975-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" , Thomas Gleixner , Bjorn Helgaas , Yinghai Lu , Borislav Petkov , Len Brown Cc: Jiang Liu , Tony Luck , x86@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org 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 --- 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