1 /*
2 * Copyright 2018 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 #include "priv.h"
23
24 #include <core/memory.h>
25
26 static void
nvkm_fault_ntfy_fini(struct nvkm_event * event,int type,int index)27 nvkm_fault_ntfy_fini(struct nvkm_event *event, int type, int index)
28 {
29 struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
30 fault->func->buffer.intr(fault->buffer[index], false);
31 }
32
33 static void
nvkm_fault_ntfy_init(struct nvkm_event * event,int type,int index)34 nvkm_fault_ntfy_init(struct nvkm_event *event, int type, int index)
35 {
36 struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
37 fault->func->buffer.intr(fault->buffer[index], true);
38 }
39
40 static const struct nvkm_event_func
41 nvkm_fault_ntfy = {
42 .init = nvkm_fault_ntfy_init,
43 .fini = nvkm_fault_ntfy_fini,
44 };
45
46 static void
nvkm_fault_intr(struct nvkm_subdev * subdev)47 nvkm_fault_intr(struct nvkm_subdev *subdev)
48 {
49 struct nvkm_fault *fault = nvkm_fault(subdev);
50 return fault->func->intr(fault);
51 }
52
53 static int
nvkm_fault_fini(struct nvkm_subdev * subdev,bool suspend)54 nvkm_fault_fini(struct nvkm_subdev *subdev, bool suspend)
55 {
56 struct nvkm_fault *fault = nvkm_fault(subdev);
57 if (fault->func->fini)
58 fault->func->fini(fault);
59 return 0;
60 }
61
62 static int
nvkm_fault_init(struct nvkm_subdev * subdev)63 nvkm_fault_init(struct nvkm_subdev *subdev)
64 {
65 struct nvkm_fault *fault = nvkm_fault(subdev);
66 if (fault->func->init)
67 fault->func->init(fault);
68 return 0;
69 }
70
71 static int
nvkm_fault_oneinit_buffer(struct nvkm_fault * fault,int id)72 nvkm_fault_oneinit_buffer(struct nvkm_fault *fault, int id)
73 {
74 struct nvkm_subdev *subdev = &fault->subdev;
75 struct nvkm_device *device = subdev->device;
76 struct nvkm_fault_buffer *buffer;
77 int ret;
78
79 if (!(buffer = kzalloc(sizeof(*buffer), GFP_KERNEL)))
80 return -ENOMEM;
81 buffer->fault = fault;
82 buffer->id = id;
83 fault->func->buffer.info(buffer);
84 fault->buffer[id] = buffer;
85
86 nvkm_debug(subdev, "buffer %d: %d entries\n", id, buffer->entries);
87
88 ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, buffer->entries *
89 fault->func->buffer.entry_size, 0x1000, true,
90 &buffer->mem);
91 if (ret)
92 return ret;
93
94 /* Pin fault buffer in BAR2. */
95 buffer->addr = fault->func->buffer.pin(buffer);
96 if (buffer->addr == ~0ULL)
97 return -EFAULT;
98
99 return 0;
100 }
101
102 static int
nvkm_fault_oneinit(struct nvkm_subdev * subdev)103 nvkm_fault_oneinit(struct nvkm_subdev *subdev)
104 {
105 struct nvkm_fault *fault = nvkm_fault(subdev);
106 int ret, i;
107
108 for (i = 0; i < ARRAY_SIZE(fault->buffer); i++) {
109 if (i < fault->func->buffer.nr) {
110 ret = nvkm_fault_oneinit_buffer(fault, i);
111 if (ret)
112 return ret;
113 fault->buffer_nr = i + 1;
114 }
115 }
116
117 ret = nvkm_event_init(&nvkm_fault_ntfy, subdev, 1, fault->buffer_nr, &fault->event);
118 if (ret)
119 return ret;
120
121 if (fault->func->oneinit)
122 ret = fault->func->oneinit(fault);
123 return ret;
124 }
125
126 static void *
nvkm_fault_dtor(struct nvkm_subdev * subdev)127 nvkm_fault_dtor(struct nvkm_subdev *subdev)
128 {
129 struct nvkm_fault *fault = nvkm_fault(subdev);
130 int i;
131
132 nvkm_event_ntfy_del(&fault->nrpfb);
133 nvkm_event_fini(&fault->event);
134
135 for (i = 0; i < fault->buffer_nr; i++) {
136 if (fault->buffer[i]) {
137 nvkm_memory_unref(&fault->buffer[i]->mem);
138 kfree(fault->buffer[i]);
139 }
140 }
141
142 return fault;
143 }
144
145 static const struct nvkm_subdev_func
146 nvkm_fault = {
147 .dtor = nvkm_fault_dtor,
148 .oneinit = nvkm_fault_oneinit,
149 .init = nvkm_fault_init,
150 .fini = nvkm_fault_fini,
151 .intr = nvkm_fault_intr,
152 };
153
154 int
nvkm_fault_new_(const struct nvkm_fault_func * func,struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_fault ** pfault)155 nvkm_fault_new_(const struct nvkm_fault_func *func, struct nvkm_device *device,
156 enum nvkm_subdev_type type, int inst, struct nvkm_fault **pfault)
157 {
158 struct nvkm_fault *fault;
159 if (!(fault = *pfault = kzalloc(sizeof(*fault), GFP_KERNEL)))
160 return -ENOMEM;
161 nvkm_subdev_ctor(&nvkm_fault, device, type, inst, &fault->subdev);
162 fault->func = func;
163 fault->user.ctor = nvkm_ufault_new;
164 fault->user.base = func->user.base;
165 return 0;
166 }
167