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