1 // Copyright 2022 Google LLC
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "config.h"
16
17 #include "pcie_bifurcation.hpp"
18
19 #include "commands.hpp"
20 #include "errors.hpp"
21 #include "handler.hpp"
22
23 #include <ipmid/api-types.hpp>
24 #include <stdplus/print.hpp>
25
26 #include <span>
27 #include <vector>
28
29 namespace google
30 {
31 namespace ipmi
32 {
33
34 namespace
35 {
36 #ifndef MAX_IPMI_BUFFER
37 #define MAX_IPMI_BUFFER 64
38 #endif
39 } // namespace
40
41 struct PcieBifurcationRequest
42 {
43 uint8_t pcieIndex;
44 } __attribute__((packed));
45
pcieBifurcation(std::span<const uint8_t> data,HandlerInterface * handler)46 Resp pcieBifurcation(std::span<const uint8_t> data, HandlerInterface* handler)
47 {
48 if (data.size() < sizeof(struct PcieBifurcationRequest))
49 {
50 stdplus::print(stderr, "Invalid command length: {}\n",
51 static_cast<uint32_t>(data.size()));
52 return ::ipmi::responseReqDataLenInvalid();
53 }
54
55 auto bifurcation = handler->pcieBifurcation(/*index=*/data[0]);
56
57 int length = sizeof(struct PcieBifurcationReply) + bifurcation.size();
58
59 if (length > MAX_IPMI_BUFFER)
60 {
61 stdplus::print(stderr, "Response would overflow response buffer\n");
62 return ::ipmi::responseInvalidCommand();
63 }
64
65 std::vector<std::uint8_t> reply;
66 reply.reserve(bifurcation.size() + sizeof(struct PcieBifurcationReply));
67 reply.emplace_back(bifurcation.size()); /* bifurcationLength */
68 reply.insert(reply.end(), bifurcation.begin(),
69 bifurcation.end()); /* bifurcation */
70
71 return ::ipmi::responseSuccess(SysOEMCommands::SysPCIeSlotBifurcation,
72 reply);
73 }
74 } // namespace ipmi
75 } // namespace google
76