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->type = NVKM_SUBDEV_NR;
32 info->inst = -1;
33 info->addr = 0;
34 info->fault = -1;
35 info->engine = -1;
36 info->runlist = -1;
37 info->reset = -1;
38 info->intr = -1;
39 list_add_tail(&info->head, &top->device);
40 }
41 return info;
42 }
43
44 u32
nvkm_top_addr(struct nvkm_device * device,enum nvkm_subdev_type type,int inst)45 nvkm_top_addr(struct nvkm_device *device, enum nvkm_subdev_type type, int inst)
46 {
47 struct nvkm_top *top = device->top;
48 struct nvkm_top_device *info;
49
50 if (top) {
51 list_for_each_entry(info, &top->device, head) {
52 if (info->type == type && info->inst == inst)
53 return info->addr;
54 }
55 }
56
57 return 0;
58 }
59
60 u32
nvkm_top_reset(struct nvkm_device * device,enum nvkm_subdev_type type,int inst)61 nvkm_top_reset(struct nvkm_device *device, enum nvkm_subdev_type type, int inst)
62 {
63 struct nvkm_top *top = device->top;
64 struct nvkm_top_device *info;
65
66 if (top) {
67 list_for_each_entry(info, &top->device, head) {
68 if (info->type == type && info->inst == inst && info->reset >= 0)
69 return BIT(info->reset);
70 }
71 }
72
73 return 0;
74 }
75
76 u32
nvkm_top_intr_mask(struct nvkm_device * device,enum nvkm_subdev_type type,int inst)77 nvkm_top_intr_mask(struct nvkm_device *device, enum nvkm_subdev_type type, int inst)
78 {
79 struct nvkm_top *top = device->top;
80 struct nvkm_top_device *info;
81
82 if (top) {
83 list_for_each_entry(info, &top->device, head) {
84 if (info->type == type && info->inst == inst && info->intr >= 0)
85 return BIT(info->intr);
86 }
87 }
88
89 return 0;
90 }
91
92 int
nvkm_top_fault_id(struct nvkm_device * device,enum nvkm_subdev_type type,int inst)93 nvkm_top_fault_id(struct nvkm_device *device, enum nvkm_subdev_type type, int inst)
94 {
95 struct nvkm_top *top = device->top;
96 struct nvkm_top_device *info;
97
98 list_for_each_entry(info, &top->device, head) {
99 if (info->type == type && info->inst == inst && info->fault >= 0)
100 return info->fault;
101 }
102
103 return -ENOENT;
104 }
105
106 struct nvkm_subdev *
nvkm_top_fault(struct nvkm_device * device,int fault)107 nvkm_top_fault(struct nvkm_device *device, int fault)
108 {
109 struct nvkm_top *top = device->top;
110 struct nvkm_top_device *info;
111
112 list_for_each_entry(info, &top->device, head) {
113 if (info->fault == fault)
114 return nvkm_device_subdev(device, info->type, info->inst);
115 }
116
117 return NULL;
118 }
119
120 int
nvkm_top_parse(struct nvkm_device * device)121 nvkm_top_parse(struct nvkm_device *device)
122 {
123 struct nvkm_top *top = device->top;
124
125 if (!top || !list_empty(&top->device))
126 return 0;
127
128 return top->func->parse(top);
129 }
130
131 static void *
nvkm_top_dtor(struct nvkm_subdev * subdev)132 nvkm_top_dtor(struct nvkm_subdev *subdev)
133 {
134 struct nvkm_top *top = nvkm_top(subdev);
135 struct nvkm_top_device *info, *temp;
136
137 list_for_each_entry_safe(info, temp, &top->device, head) {
138 list_del(&info->head);
139 kfree(info);
140 }
141
142 return top;
143 }
144
145 static const struct nvkm_subdev_func
146 nvkm_top = {
147 .dtor = nvkm_top_dtor,
148 };
149
150 int
nvkm_top_new_(const struct nvkm_top_func * func,struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_top ** ptop)151 nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device,
152 enum nvkm_subdev_type type, int inst, struct nvkm_top **ptop)
153 {
154 struct nvkm_top *top;
155 if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL)))
156 return -ENOMEM;
157 nvkm_subdev_ctor(&nvkm_top, device, type, inst, &top->subdev);
158 top->func = func;
159 INIT_LIST_HEAD(&top->device);
160 return 0;
161 }
162