xref: /openbmc/qemu/hw/smbios/smbios_type_38.c (revision ea0ec714)
1 /*
2  * IPMI SMBIOS firmware handling
3  *
4  * Copyright (c) 2015,2016 Corey Minyard, MontaVista Software, LLC
5  *
6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
7  * See the COPYING file in the top-level directory.
8  */
9 
10 #include "qemu/osdep.h"
11 #include "hw/ipmi/ipmi.h"
12 #include "hw/firmware/smbios.h"
13 #include "qemu/error-report.h"
14 #include "smbios_build.h"
15 
16 /* SMBIOS type 38 - IPMI */
17 struct smbios_type_38 {
18     struct smbios_structure_header header;
19     uint8_t interface_type;
20     uint8_t ipmi_spec_revision;
21     uint8_t i2c_slave_address;
22     uint8_t nv_storage_device_address;
23     uint64_t base_address;
24     uint8_t base_address_modifier;
25     uint8_t interrupt_number;
26 } QEMU_PACKED;
27 
smbios_build_one_type_38(IPMIFwInfo * info)28 static void smbios_build_one_type_38(IPMIFwInfo *info)
29 {
30     uint64_t baseaddr = info->base_address;
31     SMBIOS_BUILD_TABLE_PRE(38, 0x3000, true);
32 
33     t->interface_type = info->interface_type;
34     t->ipmi_spec_revision = ((info->ipmi_spec_major_revision << 4)
35                              | info->ipmi_spec_minor_revision);
36     t->i2c_slave_address = info->i2c_slave_address;
37     t->nv_storage_device_address = 0;
38 
39     assert(info->ipmi_spec_minor_revision <= 15);
40     assert(info->ipmi_spec_major_revision <= 15);
41 
42     /* or 1 to set it to I/O space */
43     switch (info->memspace) {
44     case IPMI_MEMSPACE_IO:
45         baseaddr |= 1;
46         break;
47     case IPMI_MEMSPACE_MEM32:
48     case IPMI_MEMSPACE_MEM64:
49         break;
50     case IPMI_MEMSPACE_SMBUS:
51         baseaddr <<= 1;
52         break;
53     }
54 
55     t->base_address = cpu_to_le64(baseaddr);
56 
57     t->base_address_modifier = 0;
58     if (info->irq_type == IPMI_LEVEL_IRQ) {
59         t->base_address_modifier |= 1;
60     }
61     switch (info->register_spacing) {
62     case 1:
63         break;
64     case 4:
65         t->base_address_modifier |= 1 << 6;
66         break;
67     case 16:
68         t->base_address_modifier |= 2 << 6;
69         break;
70     default:
71         error_report("IPMI register spacing %d is not compatible with"
72                      " SMBIOS, ignoring this entry.", info->register_spacing);
73         return;
74     }
75     t->interrupt_number = info->interrupt_number;
76 
77     SMBIOS_BUILD_TABLE_POST;
78 }
79 
smbios_add_ipmi_devices(BusState * bus)80 static void smbios_add_ipmi_devices(BusState *bus)
81 {
82     BusChild *kid;
83 
84     QTAILQ_FOREACH(kid, &bus->children,  sibling) {
85         DeviceState *dev = kid->child;
86         Object *obj = object_dynamic_cast(OBJECT(dev), TYPE_IPMI_INTERFACE);
87         BusState *childbus;
88 
89         if (obj) {
90             IPMIInterface *ii;
91             IPMIInterfaceClass *iic;
92             IPMIFwInfo info;
93 
94             ii = IPMI_INTERFACE(obj);
95             iic = IPMI_INTERFACE_GET_CLASS(obj);
96             memset(&info, 0, sizeof(info));
97             if (!iic->get_fwinfo) {
98                 continue;
99             }
100             iic->get_fwinfo(ii, &info);
101             smbios_build_one_type_38(&info);
102             continue;
103         }
104 
105         QLIST_FOREACH(childbus, &dev->child_bus, sibling) {
106             smbios_add_ipmi_devices(childbus);
107         }
108     }
109 }
110 
smbios_build_type_38_table(void)111 void smbios_build_type_38_table(void)
112 {
113     BusState *bus;
114 
115     bus = sysbus_get_default();
116     if (bus) {
117         smbios_add_ipmi_devices(bus);
118     }
119 }
120