1 /* $NetBSD: nouveau_nvkm_subdev_top_base.c,v 1.2 2021/12/18 23:45:42 riastradh Exp $ */
2
3 /*
4 * Copyright 2016 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_top_base.c,v 1.2 2021/12/18 23:45:42 riastradh Exp $");
28
29 #include "priv.h"
30
31 struct nvkm_top_device *
nvkm_top_device_new(struct nvkm_top * top)32 nvkm_top_device_new(struct nvkm_top *top)
33 {
34 struct nvkm_top_device *info = kmalloc(sizeof(*info), GFP_KERNEL);
35 if (info) {
36 info->index = NVKM_SUBDEV_NR;
37 info->addr = 0;
38 info->fault = -1;
39 info->engine = -1;
40 info->runlist = -1;
41 info->reset = -1;
42 info->intr = -1;
43 list_add_tail(&info->head, &top->device);
44 }
45 return info;
46 }
47
48 u32
nvkm_top_addr(struct nvkm_device * device,enum nvkm_devidx index)49 nvkm_top_addr(struct nvkm_device *device, enum nvkm_devidx index)
50 {
51 struct nvkm_top *top = device->top;
52 struct nvkm_top_device *info;
53
54 if (top) {
55 list_for_each_entry(info, &top->device, head) {
56 if (info->index == index)
57 return info->addr;
58 }
59 }
60
61 return 0;
62 }
63
64 u32
nvkm_top_reset(struct nvkm_device * device,enum nvkm_devidx index)65 nvkm_top_reset(struct nvkm_device *device, enum nvkm_devidx index)
66 {
67 struct nvkm_top *top = device->top;
68 struct nvkm_top_device *info;
69
70 if (top) {
71 list_for_each_entry(info, &top->device, head) {
72 if (info->index == index && info->reset >= 0)
73 return BIT(info->reset);
74 }
75 }
76
77 return 0;
78 }
79
80 u32
nvkm_top_intr_mask(struct nvkm_device * device,enum nvkm_devidx devidx)81 nvkm_top_intr_mask(struct nvkm_device *device, enum nvkm_devidx devidx)
82 {
83 struct nvkm_top *top = device->top;
84 struct nvkm_top_device *info;
85
86 if (top) {
87 list_for_each_entry(info, &top->device, head) {
88 if (info->index == devidx && info->intr >= 0)
89 return BIT(info->intr);
90 }
91 }
92
93 return 0;
94 }
95
96 u32
nvkm_top_intr(struct nvkm_device * device,u32 intr,u64 * psubdevs)97 nvkm_top_intr(struct nvkm_device *device, u32 intr, u64 *psubdevs)
98 {
99 struct nvkm_top *top = device->top;
100 struct nvkm_top_device *info;
101 u64 subdevs = 0;
102 u32 handled = 0;
103
104 if (top) {
105 list_for_each_entry(info, &top->device, head) {
106 if (info->index != NVKM_SUBDEV_NR && info->intr >= 0) {
107 if (intr & BIT(info->intr)) {
108 subdevs |= BIT_ULL(info->index);
109 handled |= BIT(info->intr);
110 }
111 }
112 }
113 }
114
115 *psubdevs = subdevs;
116 return intr & ~handled;
117 }
118
119 int
nvkm_top_fault_id(struct nvkm_device * device,enum nvkm_devidx devidx)120 nvkm_top_fault_id(struct nvkm_device *device, enum nvkm_devidx devidx)
121 {
122 struct nvkm_top *top = device->top;
123 struct nvkm_top_device *info;
124
125 list_for_each_entry(info, &top->device, head) {
126 if (info->index == devidx && info->fault >= 0)
127 return info->fault;
128 }
129
130 return -ENOENT;
131 }
132
133 enum nvkm_devidx
nvkm_top_fault(struct nvkm_device * device,int fault)134 nvkm_top_fault(struct nvkm_device *device, int fault)
135 {
136 struct nvkm_top *top = device->top;
137 struct nvkm_top_device *info;
138
139 list_for_each_entry(info, &top->device, head) {
140 if (info->fault == fault)
141 return info->index;
142 }
143
144 return NVKM_SUBDEV_NR;
145 }
146
147 enum nvkm_devidx
nvkm_top_engine(struct nvkm_device * device,int index,int * runl,int * engn)148 nvkm_top_engine(struct nvkm_device *device, int index, int *runl, int *engn)
149 {
150 struct nvkm_top *top = device->top;
151 struct nvkm_top_device *info;
152 int n = 0;
153
154 list_for_each_entry(info, &top->device, head) {
155 if (info->engine >= 0 && info->runlist >= 0 && n++ == index) {
156 *runl = info->runlist;
157 *engn = info->engine;
158 return info->index;
159 }
160 }
161
162 return -ENODEV;
163 }
164
165 static int
nvkm_top_oneinit(struct nvkm_subdev * subdev)166 nvkm_top_oneinit(struct nvkm_subdev *subdev)
167 {
168 struct nvkm_top *top = nvkm_top(subdev);
169 return top->func->oneinit(top);
170 }
171
172 static void *
nvkm_top_dtor(struct nvkm_subdev * subdev)173 nvkm_top_dtor(struct nvkm_subdev *subdev)
174 {
175 struct nvkm_top *top = nvkm_top(subdev);
176 struct nvkm_top_device *info, *temp;
177
178 list_for_each_entry_safe(info, temp, &top->device, head) {
179 list_del(&info->head);
180 kfree(info);
181 }
182
183 return top;
184 }
185
186 static const struct nvkm_subdev_func
187 nvkm_top = {
188 .dtor = nvkm_top_dtor,
189 .oneinit = nvkm_top_oneinit,
190 };
191
192 int
nvkm_top_new_(const struct nvkm_top_func * func,struct nvkm_device * device,int index,struct nvkm_top ** ptop)193 nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device,
194 int index, struct nvkm_top **ptop)
195 {
196 struct nvkm_top *top;
197 if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL)))
198 return -ENOMEM;
199 nvkm_subdev_ctor(&nvkm_top, device, index, &top->subdev);
200 top->func = func;
201 INIT_LIST_HEAD(&top->device);
202 return 0;
203 }
204