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| author | Laszlo Ersek <lersek@redhat.com> | 2016-07-01 01:35:19 +0200 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2016-07-13 08:38:41 +0200 |
| commit | 12e6f4f1be0246f735495eb9b6987a6d94fa5b35 (patch) | |
| tree | 05e99ac9f0c5e9ddfbbc6faf189530a11079fcae /MdePkg/Include | |
| parent | 2eb358986052bd0104f6d16fbeb0a450658256fc (diff) | |
| download | edk2-platforms-12e6f4f1be0246f735495eb9b6987a6d94fa5b35.tar.xz | |
MdePkg/IndustryStandard: introduce EFI_PCI_CAPABILITY_ID_SHPC
The "Pci22.h" header file defines the macro EFI_PCI_CAPABILITY_ID_HOTPLUG
with value 0x06. According to all of:
- later parts of the same header file,
- Appendix H ("Capability IDs") of the PCI Local Bus Specification
Revision 2.3,
- and Chapter 2 ("Capability IDs") of the PCI Code and ID Assignment
Specification Revision 0.9,
0x06 means "CompactPCI Hot Swap". It does not mean "PCI Hot-Plug": that
capability is described by ID 0x0C:
0Ch PCI Hot-Plug -- This Capability ID indicates that the associated
device conforms to the Standard Hot-Plug Controller model.
Therefore EFI_PCI_CAPABILITY_ID_HOTPLUG is arguably a misnomer. PciBusDxe
(mis-)uses EFI_PCI_CAPABILITY_ID_HOTPLUG in the IsSHPC() helper function
to identify PCI Hot-Plug capability.
In order to preserve compatibility with existent code, leave
EFI_PCI_CAPABILITY_ID_HOTPLUG alone, and introduce
EFI_PCI_CAPABILITY_ID_SHPC with the right ID value.
Cc: "Johnson, Brian J." <bjohnson@sgi.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Andrew Fish <afish@apple.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Marcel Apfelbaum <marcel@redhat.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ruiyu Ni <Ruiyu.ni@intel.com>
Diffstat (limited to 'MdePkg/Include')
| -rw-r--r-- | MdePkg/Include/IndustryStandard/Pci22.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/MdePkg/Include/IndustryStandard/Pci22.h b/MdePkg/Include/IndustryStandard/Pci22.h index db24a153e1..4cf8389c69 100644 --- a/MdePkg/Include/IndustryStandard/Pci22.h +++ b/MdePkg/Include/IndustryStandard/Pci22.h @@ -635,6 +635,7 @@ typedef union { #define EFI_PCI_CAPABILITY_ID_SLOTID 0x04
#define EFI_PCI_CAPABILITY_ID_MSI 0x05
#define EFI_PCI_CAPABILITY_ID_HOTPLUG 0x06
+#define EFI_PCI_CAPABILITY_ID_SHPC 0x0C
///
/// Capabilities List Header
|