1 // SPDX-License-Identifier: Apache-2.0
2 // Copyright (C) 2018 IBM Corp.
3 #include "mboxd_pnor_partition_table.h"
4 #include "pnor_partition_table.hpp"
5 #include "common.h"
6 #include "mbox.h"
7 #include "mboxd_flash.h"
8 #include "pnor_partition_table.hpp"
9 #include "config.h"
10 #include "xyz/openbmc_project/Common/error.hpp"
11 #include <phosphor-logging/elog-errors.hpp>
12 #include <experimental/filesystem>
13 #include "vpnor/mboxd_msg.hpp"
14 
15 int init_vpnor(struct mbox_context *context)
16 {
17     if (context && !context->vpnor)
18     {
19         int rc;
20 
21         strncpy(context->paths.ro_loc, PARTITION_FILES_RO_LOC, PATH_MAX);
22         context->paths.ro_loc[PATH_MAX - 1] = '\0';
23         strncpy(context->paths.rw_loc, PARTITION_FILES_RW_LOC, PATH_MAX);
24         context->paths.rw_loc[PATH_MAX - 1] = '\0';
25         strncpy(context->paths.prsv_loc, PARTITION_FILES_PRSV_LOC, PATH_MAX);
26         context->paths.prsv_loc[PATH_MAX - 1] = '\0';
27         strncpy(context->paths.patch_loc, PARTITION_FILES_PATCH_LOC, PATH_MAX);
28         context->paths.prsv_loc[PATH_MAX - 1] = '\0';
29 
30         rc = init_vpnor_from_paths(context);
31         if (rc < 0)
32         {
33             return rc;
34         }
35     }
36 
37     return 0;
38 }
39 
40 int init_vpnor_from_paths(struct mbox_context *context)
41 {
42     namespace err = sdbusplus::xyz::openbmc_project::Common::Error;
43     namespace fs = std::experimental::filesystem;
44     namespace vpnor = openpower::virtual_pnor;
45 
46     if (context && !context->vpnor)
47     {
48         context->handlers = vpnor_mbox_handlers;
49 
50         try
51         {
52             context->vpnor = new vpnor_partition_table;
53             context->vpnor->table =
54                 new openpower::virtual_pnor::partition::Table(context);
55         }
56         catch (vpnor::TocEntryError &e)
57         {
58             MSG_ERR("%s\n", e.what());
59             phosphor::logging::commit<err::InternalFailure>();
60             return -MBOX_R_SYSTEM_ERROR;
61         }
62     }
63 
64     return 0;
65 }
66 
67 int vpnor_copy_bootloader_partition(const struct mbox_context *context)
68 {
69     // The hostboot bootloader has certain size/offset assumptions, so
70     // we need a special partition table here.
71     // It assumes the PNOR is 64M, the TOC size is 32K, the erase block is
72     // 4K, the page size is 4K.
73     // It also assumes the TOC is at the 'end of pnor - toc size - 1 page size'
74     // offset, and first looks for the TOC here, before proceeding to move up
75     // page by page looking for the TOC. So it is optimal to place the TOC at
76     // this offset.
77     constexpr size_t eraseSize = 0x1000;
78     constexpr size_t pageSize = 0x1000;
79     constexpr size_t pnorSize = 0x4000000;
80     constexpr size_t tocMaxSize = 0x8000;
81     constexpr size_t tocStart = pnorSize - tocMaxSize - pageSize;
82     constexpr auto blPartitionName = "HBB";
83 
84     namespace err = sdbusplus::xyz::openbmc_project::Common::Error;
85     namespace fs = std::experimental::filesystem;
86     namespace vpnor = openpower::virtual_pnor;
87 
88     try
89     {
90         vpnor_partition_table vtbl{};
91         struct mbox_context local = *context;
92         local.vpnor = &vtbl;
93         local.block_size_shift = log_2(eraseSize);
94 
95         openpower::virtual_pnor::partition::Table blTable(&local);
96 
97         vtbl.table = &blTable;
98 
99         size_t tocOffset = 0;
100 
101         // Copy TOC
102         copy_flash(&local, tocOffset,
103                    static_cast<uint8_t *>(context->mem) + tocStart,
104                    blTable.capacity());
105         const pnor_partition &partition = blTable.partition(blPartitionName);
106         size_t hbbOffset = partition.data.base * eraseSize;
107         uint32_t hbbSize = partition.data.actual;
108         // Copy HBB
109         copy_flash(&local, hbbOffset,
110                    static_cast<uint8_t *>(context->mem) + hbbOffset, hbbSize);
111     }
112     catch (err::InternalFailure &e)
113     {
114         phosphor::logging::commit<err::InternalFailure>();
115         return -MBOX_R_SYSTEM_ERROR;
116     }
117     catch (vpnor::TocEntryError &e)
118     {
119         MSG_ERR("%s\n", e.what());
120         phosphor::logging::commit<err::InternalFailure>();
121         return -MBOX_R_SYSTEM_ERROR;
122     }
123 
124     return 0;
125 }
126 
127 void destroy_vpnor(struct mbox_context *context)
128 {
129     if (context && context->vpnor)
130     {
131         delete context->vpnor->table;
132         delete context->vpnor;
133         context->vpnor = nullptr;
134     }
135 }
136