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From: Heyi Guo <heyi.guo@linaro.org>
To: edk2-devel@lists.01.org
Cc: Heyi Guo <heyi.guo@linaro.org>, Ruiyu Ni <ruiyu.ni@intel.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Star Zeng <star.zeng@intel.com>, Eric Dong <eric.dong@intel.com>,
	Laszlo Ersek <lersek@redhat.com>,
	Michael D Kinney <michael.d.kinney@intel.com>
Subject: [PATCH v5 6/6] MdeModulePkg/PciBus: return CPU address for GetBarAttributes
Date: Thu,  1 Mar 2018 14:57:24 +0800	[thread overview]
Message-ID: <1519887444-75510-7-git-send-email-heyi.guo@linaro.org> (raw)
In-Reply-To: <1519887444-75510-1-git-send-email-heyi.guo@linaro.org>

According to UEFI spec 2.7, PciIo->GetBarAttributes should return host
address (CPU view ddress) rather than device address (PCI view
address), and
device address = host address + address translation offset,
so we subtract translation from device address before returning.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Heyi Guo <heyi.guo@linaro.org>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
---
 MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
index fef3eceb7f62..62179eb44bbd 100644
--- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
+++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
@@ -1972,6 +1972,10 @@ PciIoGetBarAttributes (
         return EFI_UNSUPPORTED;
       }
     }
+
+    // According to UEFI spec 2.7, we need return host address for
+    // PciIo->GetBarAttributes, and host address = device address - translation.
+    Descriptor->AddrRangeMin -= Descriptor->AddrTranslationOffset;
   }
 
   return EFI_SUCCESS;
-- 
2.7.4



  parent reply	other threads:[~2018-03-01  6:52 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-01  6:57 [PATCH v5 0/6] Add translation support to generic PciHostBridge Heyi Guo
2018-03-01  6:57 ` [PATCH v5 1/6] CorebootPayloadPkg/PciHostBridgeLib: Init PCI aperture to 0 Heyi Guo
2018-03-14 11:24   ` Ard Biesheuvel
2018-03-01  6:57 ` [PATCH v5 2/6] OvmfPkg/PciHostBridgeLib: " Heyi Guo
2018-03-01 10:17   ` Laszlo Ersek
2018-03-01 10:48     ` Guo Heyi
2018-03-02 10:19       ` Laszlo Ersek
2018-03-05  8:23         ` Guo Heyi
2018-03-01 10:20   ` Laszlo Ersek
2018-03-01 10:25     ` Guo Heyi
2018-03-01 12:03     ` Ni, Ruiyu
2018-03-02 10:08       ` Laszlo Ersek
2018-03-01  6:57 ` [PATCH v5 3/6] MdeModulePkg/PciHostBridgeLib.h: add address Translation Heyi Guo
2018-03-01  6:57 ` [PATCH v5 4/6] MdeModulePkg/PciHostBridgeDxe: Add support for address translation Heyi Guo
2018-03-06  2:44   ` Guo Heyi
2018-03-07  4:30     ` Ni, Ruiyu
2018-03-07  6:01       ` Guo Heyi
2018-03-14  7:57         ` Ni, Ruiyu
2018-03-14 11:25           ` Ard Biesheuvel
2018-03-15  2:57           ` Guo Heyi
2018-03-15  3:25             ` Ni, Ruiyu
2018-03-12 17:18       ` Ard Biesheuvel
2018-03-13  3:00         ` Ni, Ruiyu
2018-03-13  7:31           ` Guo Heyi
2018-03-13  8:04             ` Ard Biesheuvel
2018-03-01  6:57 ` [PATCH v5 5/6] MdeModulePkg/PciBus: convert host address to device address Heyi Guo
2018-03-01  6:57 ` Heyi Guo [this message]
2018-03-01  8:28 ` [PATCH v5 0/6] Add translation support to generic PciHostBridge Ard Biesheuvel
2018-03-15  1:07 ` Ni, Ruiyu

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