commit 6c71b0f9fe1cd604dd894b45acb9870cc47b27b5
author Willy Tu <wltu@google.com> Sun Oct 10 13:34:41 2021 -0700
committer Willy Tu <wltu@google.com> Mon May 23 06:06:54 2022 +0000
tree 7142eb7a637ef4ed10df3fd6a7bba45c0c397337
parent 726ef31a11bf4cb86075e2a48236d507e955124b

pcie_bifurcation: Fetch bifurcation at a PCIe slot with hardcoded values

This will read a json config and return the bifurcation based on that.
It will read the configure file in a persistent file to see if it is
valid machine config and return the bifurcation information
accordingly.

For example,
If it is valid config, it will return 8x8 for PE1,3,4,6.

Tested:
Unit tests passed.

Physical Tests.

PE0 -> no bifurcation
PE1 -> x8x8

```
$ ipmitool raw 0x2e 0x32 0x79 0x2b 0x00 0x0f 0
 79 2b 00 0b 00

$ ipmitool raw 0x2e 0x32 0x79 0x2b 0x00 0x0f 1
 79 2b 00 0b 02 08 08
```

Change-Id: I44aefbfb26372f8bc0069343c8a6d07d3cf6f42d
Signed-off-by: Willy Tu <wltu@google.com>

ipmi.cpp

diff --git a/ipmi.cpp b/ipmi.cpp
index 715264b..0638a82 100644
--- a/ipmi.cpp
+++ b/ipmi.cpp
@@ -24,6 +24,7 @@
 #include "handler.hpp"
 #include "host_power_off.hpp"
 #include "machine_name.hpp"
+#include "pcie_bifurcation.hpp"
 #include "pcie_i2c.hpp"
 #include "psu.hpp"
 
@@ -76,6 +77,8 @@
             return accelOobRead(data, handler);
         case SysAccelOobWrite:
             return accelOobWrite(data, handler);
+        case SysPCIeSlotBifurcation:
+            return pcieBifurcation(data, handler);
         default:
             std::fprintf(stderr, "Invalid subcommand: 0x%x\n", cmd);
             return ::ipmi::responseInvalidCommand();