acpi_iort.c revision 1.5 1 1.5 jmcneill /* $NetBSD: acpi_iort.c,v 1.5 2024/12/09 21:56:19 jmcneill Exp $ */
2 1.1 jmcneill
3 1.1 jmcneill /*-
4 1.1 jmcneill * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 1.1 jmcneill * All rights reserved.
6 1.1 jmcneill *
7 1.1 jmcneill * This code is derived from software contributed to The NetBSD Foundation
8 1.1 jmcneill * by Jared McNeill <jmcneill (at) invisible.ca>.
9 1.1 jmcneill *
10 1.1 jmcneill * Redistribution and use in source and binary forms, with or without
11 1.1 jmcneill * modification, are permitted provided that the following conditions
12 1.1 jmcneill * are met:
13 1.1 jmcneill * 1. Redistributions of source code must retain the above copyright
14 1.1 jmcneill * notice, this list of conditions and the following disclaimer.
15 1.1 jmcneill * 2. Redistributions in binary form must reproduce the above copyright
16 1.1 jmcneill * notice, this list of conditions and the following disclaimer in the
17 1.1 jmcneill * documentation and/or other materials provided with the distribution.
18 1.1 jmcneill *
19 1.1 jmcneill * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 1.1 jmcneill * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 1.1 jmcneill * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 1.1 jmcneill * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 1.1 jmcneill * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 1.1 jmcneill * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 1.1 jmcneill * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 1.1 jmcneill * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 1.1 jmcneill * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 1.1 jmcneill * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 1.1 jmcneill * POSSIBILITY OF SUCH DAMAGE.
30 1.1 jmcneill */
31 1.1 jmcneill
32 1.1 jmcneill #include <sys/cdefs.h>
33 1.5 jmcneill __KERNEL_RCSID(0, "$NetBSD: acpi_iort.c,v 1.5 2024/12/09 21:56:19 jmcneill Exp $");
34 1.1 jmcneill
35 1.1 jmcneill #include <sys/param.h>
36 1.1 jmcneill #include <sys/bus.h>
37 1.1 jmcneill #include <sys/cpu.h>
38 1.1 jmcneill
39 1.1 jmcneill #include <dev/acpi/acpireg.h>
40 1.1 jmcneill #include <dev/acpi/acpivar.h>
41 1.1 jmcneill
42 1.1 jmcneill #include <arm/acpi/acpi_iort.h>
43 1.1 jmcneill
44 1.1 jmcneill static ACPI_IORT_ID_MAPPING *
45 1.1 jmcneill acpi_iort_id_map(ACPI_IORT_NODE *node, uint32_t *id)
46 1.1 jmcneill {
47 1.1 jmcneill ACPI_IORT_ID_MAPPING *map;
48 1.1 jmcneill uint32_t offset, n;
49 1.1 jmcneill
50 1.4 jmcneill offset = le32toh(node->MappingOffset);
51 1.4 jmcneill for (n = 0; n < le32toh(node->MappingCount); n++) {
52 1.1 jmcneill map = ACPI_ADD_PTR(ACPI_IORT_ID_MAPPING, node, offset);
53 1.4 jmcneill if (le32toh(map->Flags) & ACPI_IORT_ID_SINGLE_MAPPING) {
54 1.4 jmcneill *id = le32toh(map->OutputBase);
55 1.1 jmcneill return map;
56 1.1 jmcneill }
57 1.4 jmcneill if (*id >= le32toh(map->InputBase) && *id <= le32toh(map->InputBase) + le32toh(map->IdCount)) {
58 1.4 jmcneill *id = *id - le32toh(map->InputBase) + le32toh(map->OutputBase);
59 1.1 jmcneill return map;
60 1.1 jmcneill }
61 1.1 jmcneill offset += sizeof(ACPI_IORT_ID_MAPPING);
62 1.1 jmcneill }
63 1.1 jmcneill
64 1.1 jmcneill return NULL;
65 1.1 jmcneill }
66 1.1 jmcneill
67 1.1 jmcneill static ACPI_IORT_NODE *
68 1.1 jmcneill acpi_iort_find_ref(ACPI_TABLE_IORT *iort, ACPI_IORT_NODE *node, uint32_t *id)
69 1.1 jmcneill {
70 1.1 jmcneill ACPI_IORT_ID_MAPPING *map;
71 1.1 jmcneill
72 1.1 jmcneill map = acpi_iort_id_map(node, id);
73 1.1 jmcneill if (map == NULL)
74 1.1 jmcneill return NULL;
75 1.1 jmcneill
76 1.4 jmcneill return ACPI_ADD_PTR(ACPI_IORT_NODE, iort, le32toh(map->OutputReference));
77 1.1 jmcneill }
78 1.1 jmcneill
79 1.1 jmcneill uint32_t
80 1.1 jmcneill acpi_iort_pci_root_map(u_int seg, uint32_t devid)
81 1.1 jmcneill {
82 1.1 jmcneill ACPI_TABLE_IORT *iort;
83 1.1 jmcneill ACPI_IORT_NODE *node;
84 1.1 jmcneill ACPI_IORT_ROOT_COMPLEX *root;
85 1.1 jmcneill uint32_t offset, n;
86 1.1 jmcneill ACPI_STATUS rv;
87 1.1 jmcneill
88 1.1 jmcneill rv = AcpiGetTable(ACPI_SIG_IORT, 0, (ACPI_TABLE_HEADER **)&iort);
89 1.1 jmcneill if (ACPI_FAILURE(rv))
90 1.1 jmcneill return devid;
91 1.1 jmcneill
92 1.4 jmcneill offset = le32toh(iort->NodeOffset);
93 1.4 jmcneill for (n = 0; n < le32toh(iort->NodeCount); n++) {
94 1.1 jmcneill node = ACPI_ADD_PTR(ACPI_IORT_NODE, iort, offset);
95 1.1 jmcneill if (node->Type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
96 1.1 jmcneill root = (ACPI_IORT_ROOT_COMPLEX *)node->NodeData;
97 1.4 jmcneill if (le32toh(root->PciSegmentNumber) == seg) {
98 1.1 jmcneill const uint32_t odevid = devid;
99 1.1 jmcneill do {
100 1.1 jmcneill node = acpi_iort_find_ref(iort, node, &devid);
101 1.1 jmcneill } while (node != NULL);
102 1.3 jmcneill aprint_debug("ACPI: IORT mapped devid %#x -> devid %#x\n", odevid, devid);
103 1.1 jmcneill return devid;
104 1.1 jmcneill }
105 1.1 jmcneill }
106 1.4 jmcneill offset += le16toh(node->Length);
107 1.1 jmcneill }
108 1.1 jmcneill
109 1.1 jmcneill return devid;
110 1.1 jmcneill }
111 1.3 jmcneill
112 1.3 jmcneill uint32_t
113 1.3 jmcneill acpi_iort_its_id_map(u_int seg, uint32_t devid)
114 1.3 jmcneill {
115 1.3 jmcneill ACPI_TABLE_IORT *iort;
116 1.3 jmcneill ACPI_IORT_NODE *node;
117 1.3 jmcneill ACPI_IORT_ROOT_COMPLEX *root;
118 1.3 jmcneill ACPI_IORT_ITS_GROUP *its_group;
119 1.3 jmcneill uint32_t offset, n;
120 1.3 jmcneill ACPI_STATUS rv;
121 1.3 jmcneill
122 1.3 jmcneill rv = AcpiGetTable(ACPI_SIG_IORT, 0, (ACPI_TABLE_HEADER **)&iort);
123 1.3 jmcneill if (ACPI_FAILURE(rv))
124 1.3 jmcneill return 0;
125 1.3 jmcneill
126 1.4 jmcneill offset = le32toh(iort->NodeOffset);
127 1.4 jmcneill for (n = 0; n < le32toh(iort->NodeCount); n++) {
128 1.3 jmcneill node = ACPI_ADD_PTR(ACPI_IORT_NODE, iort, offset);
129 1.3 jmcneill if (node->Type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
130 1.3 jmcneill root = (ACPI_IORT_ROOT_COMPLEX *)node->NodeData;
131 1.4 jmcneill if (le32toh(root->PciSegmentNumber) == seg) {
132 1.3 jmcneill const uint32_t odevid = devid;
133 1.3 jmcneill do {
134 1.3 jmcneill node = acpi_iort_find_ref(iort, node, &devid);
135 1.3 jmcneill if (node != NULL && node->Type == ACPI_IORT_NODE_ITS_GROUP) {
136 1.3 jmcneill its_group = (ACPI_IORT_ITS_GROUP *)node->NodeData;
137 1.4 jmcneill if (le32toh(its_group->ItsCount) == 0)
138 1.3 jmcneill return 0;
139 1.3 jmcneill aprint_debug("ACPI: IORT mapped devid %#x -> ITS %#x\n",
140 1.4 jmcneill odevid, le32toh(its_group->Identifiers[0]));
141 1.4 jmcneill return le32toh(its_group->Identifiers[0]);
142 1.3 jmcneill }
143 1.3 jmcneill } while (node != NULL);
144 1.3 jmcneill return 0;
145 1.3 jmcneill }
146 1.3 jmcneill }
147 1.4 jmcneill offset += le16toh(node->Length);
148 1.3 jmcneill }
149 1.3 jmcneill
150 1.3 jmcneill return 0;
151 1.3 jmcneill }
152 1.5 jmcneill
153 1.5 jmcneill ACPI_STATUS
154 1.5 jmcneill acpi_iort_named_component(ACPI_HANDLE handle,
155 1.5 jmcneill ACPI_IORT_NAMED_COMPONENT **out)
156 1.5 jmcneill {
157 1.5 jmcneill ACPI_TABLE_IORT *iort;
158 1.5 jmcneill ACPI_IORT_NODE *node;
159 1.5 jmcneill ACPI_IORT_NAMED_COMPONENT *nc;
160 1.5 jmcneill ACPI_HANDLE nch;
161 1.5 jmcneill uint32_t offset, n;
162 1.5 jmcneill ACPI_STATUS rv;
163 1.5 jmcneill
164 1.5 jmcneill rv = AcpiGetTable(ACPI_SIG_IORT, 0, (ACPI_TABLE_HEADER **)&iort);
165 1.5 jmcneill if (ACPI_FAILURE(rv)) {
166 1.5 jmcneill return rv;
167 1.5 jmcneill }
168 1.5 jmcneill
169 1.5 jmcneill offset = iort->NodeOffset;
170 1.5 jmcneill for (n = 0; n < iort->NodeCount; n++) {
171 1.5 jmcneill node = ACPI_ADD_PTR(ACPI_IORT_NODE, iort, offset);
172 1.5 jmcneill if (node->Type == ACPI_IORT_NODE_NAMED_COMPONENT) {
173 1.5 jmcneill nc = (ACPI_IORT_NAMED_COMPONENT *)node->NodeData;
174 1.5 jmcneill rv = AcpiGetHandle(NULL, nc->DeviceName, &nch);
175 1.5 jmcneill if (rv == AE_OK && nch == handle) {
176 1.5 jmcneill *out = nc;
177 1.5 jmcneill return AE_OK;
178 1.5 jmcneill }
179 1.5 jmcneill }
180 1.5 jmcneill offset += le16toh(node->Length);
181 1.5 jmcneill }
182 1.5 jmcneill
183 1.5 jmcneill return AE_NOT_FOUND;
184 1.5 jmcneill }
185