1/*
2 * IPMI ACPI 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/acpi/aml-build.h"
13#include "hw/acpi/acpi.h"
14#include "hw/acpi/ipmi.h"
15
16static Aml *aml_ipmi_crs(IPMIFwInfo *info)
17{
18 Aml *crs = aml_resource_template();
19
20 /*
21 * The base address is fixed and cannot change. That may be different
22 * if someone does PCI, but we aren't there yet.
23 */
24 switch (info->memspace) {
25 case IPMI_MEMSPACE_IO:
26 aml_append(crs, aml_io(AML_DECODE16, info->base_address,
27 info->base_address + info->register_length - 1,
28 info->register_spacing, info->register_length));
29 break;
30 case IPMI_MEMSPACE_MEM32:
31 aml_append(crs,
32 aml_dword_memory(AML_POS_DECODE,
33 AML_MIN_FIXED, AML_MAX_FIXED,
34 AML_NON_CACHEABLE, AML_READ_WRITE,
35 0xffffffff,
36 info->base_address,
37 info->base_address + info->register_length - 1,
38 info->register_spacing, info->register_length));
39 break;
40 case IPMI_MEMSPACE_MEM64:
41 aml_append(crs,
42 aml_qword_memory(AML_POS_DECODE,
43 AML_MIN_FIXED, AML_MAX_FIXED,
44 AML_NON_CACHEABLE, AML_READ_WRITE,
45 0xffffffffffffffffULL,
46 info->base_address,
47 info->base_address + info->register_length - 1,
48 info->register_spacing, info->register_length));
49 break;
50 case IPMI_MEMSPACE_SMBUS:
51 aml_append(crs, aml_return(aml_int(info->base_address)));
52 break;
53 default:
54 abort();
55 }
56
57 if (info->interrupt_number) {
58 aml_append(crs, aml_irq_no_flags(info->interrupt_number));
59 }
60
61 return crs;
62}
63
64static Aml *aml_ipmi_device(IPMIFwInfo *info)
65{
66 Aml *dev;
67 uint16_t version = ((info->ipmi_spec_major_revision << 8)
68 | (info->ipmi_spec_minor_revision << 4));
69
70 assert(info->ipmi_spec_minor_revision <= 15);
71
72 dev = aml_device("MI%d", info->uuid);
73 aml_append(dev, aml_name_decl("_HID", aml_eisaid("IPI0001")));
74 aml_append(dev, aml_name_decl("_STR", aml_string("ipmi_%s",
75 info->interface_name)));
76 aml_append(dev, aml_name_decl("_UID", aml_int(info->uuid)));
77 aml_append(dev, aml_name_decl("_CRS", aml_ipmi_crs(info)));
78 aml_append(dev, aml_name_decl("_IFT", aml_int(info->interface_type)));
79 aml_append(dev, aml_name_decl("_SRV", aml_int(version)));
80
81 return dev;
82}
83
84void build_acpi_ipmi_devices(Aml *scope, BusState *bus)
85{
86
87 BusChild *kid;
88
89 QTAILQ_FOREACH(kid, &bus->children, sibling) {
90 IPMIInterface *ii;
91 IPMIInterfaceClass *iic;
92 IPMIFwInfo info;
93 Object *obj = object_dynamic_cast(OBJECT(kid->child),
94 TYPE_IPMI_INTERFACE);
95
96 if (!obj) {
97 continue;
98 }
99
100 ii = IPMI_INTERFACE(obj);
101 iic = IPMI_INTERFACE_GET_CLASS(obj);
102 memset(&info, 0, sizeof(info));
103 iic->get_fwinfo(ii, &info);
104 aml_append(scope, aml_ipmi_device(&info));
105 }
106}
107