[PATCH v5 0/6] Add translation support to generic PciHostBridge

[Heyi Guo <heyi.guo@linaro.org>]

Patch v5 inherits the code from RFC v4; we don't restart the version number for
RFC to PATCH change.

v5:
- Patch 4/6: Modify the code according to the comments from Ray.
- Patch 1/6 and 2/6 are totally new. They add initialization for all fields of
  PCI_ROOT_BRIDGE_APERTURE temporary variables in PciHostBridgeLib instances, so
  that they will not suffer from extension of PCI_ROOT_BRIDGE_APERTURE
  structure.
- Generate a separate patch (3/6) for PciHostBridgeLib.h change. Though it is a
  prerequisite for patch 4/6, it does not change the code in PciHostBridge
  driver and won't cause any build failure or functional issue.


v4:
- Modify the code according to the comments from Ray, Laszlo and Ard (Please see
  the notes of Patch 1/3)
- Ignore translation of bus in CreateRootBridge.


v3:
- Keep definition of Translation consistent in EDKII code: Translation = device
  address - host address.
- Patch 2/2 is split into 2 patches (2/3 and 3/3).
- Refine comments and commit messages to make the code easier to understand.


v2:
Changs are made according to the discussion on the mailing list, including:

- PciRootBridgeIo->Configuration should return CPU view address, as well as
  PciIo->GetBarAttributes, and Translation Offset should be equal to PCI view
  address - CPU view address.
- Add translation offset to PCI_ROOT_BRIDGE_APERTURE structure definition.
- PciHostBridge driver internally used Base Address is still based on PCI view
  address, and translation offset = CPU view - PCI view, which follows the
  definition in ACPI, and not the same as that in UEFI spec.

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>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Prince Agyeman <prince.agyeman@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Julien Grall <julien.grall@linaro.org>

Heyi Guo (6):
  CorebootPayloadPkg/PciHostBridgeLib: Init PCI aperture to 0
  OvmfPkg/PciHostBridgeLib: Init PCI aperture to 0
  MdeModulePkg/PciHostBridgeLib.h: add address Translation
  MdeModulePkg/PciHostBridgeDxe: Add support for address translation
  MdeModulePkg/PciBus: convert host address to device address
  MdeModulePkg/PciBus: return CPU address for GetBarAttributes

 MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridge.h              |  21 ++++
 MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostResource.h            |   3 +
 MdeModulePkg/Include/Library/PciHostBridgeLib.h                    |  19 +++
 CorebootPayloadPkg/Library/PciHostBridgeLib/PciHostBridgeSupport.c |   5 +
 MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c                             |  12 +-
 MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridge.c              | 129 +++++++++++++++++---
 MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciRootBridgeIo.c            | 118 ++++++++++++++++--
 OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.c                |   4 +
 OvmfPkg/Library/PciHostBridgeLib/XenSupport.c                      |   5 +
 9 files changed, 288 insertions(+), 28 deletions(-)

-- 
2.7.4