1 /*
2 * Copyright 2014 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 <core/ioctl.h>
25 #include <core/client.h>
26 #include <core/engine.h>
27 #include <core/event.h>
28
29 #include <nvif/unpack.h>
30 #include <nvif/ioctl.h>
31
32 static int
nvkm_ioctl_nop(struct nvkm_client * client,struct nvkm_object * object,void * data,u32 size)33 nvkm_ioctl_nop(struct nvkm_client *client,
34 struct nvkm_object *object, void *data, u32 size)
35 {
36 return -ENOSYS;
37 }
38
39 #include <nvif/class.h>
40
41 static int
nvkm_ioctl_sclass_(struct nvkm_object * object,int index,struct nvkm_oclass * oclass)42 nvkm_ioctl_sclass_(struct nvkm_object *object, int index, struct nvkm_oclass *oclass)
43 {
44 if ( object->func->uevent &&
45 !object->func->uevent(object, NULL, 0, NULL) && index-- == 0) {
46 oclass->ctor = nvkm_uevent_new;
47 oclass->base.minver = 0;
48 oclass->base.maxver = 0;
49 oclass->base.oclass = NVIF_CLASS_EVENT;
50 return 0;
51 }
52
53 if (object->func->sclass)
54 return object->func->sclass(object, index, oclass);
55
56 return -ENOSYS;
57 }
58
59 static int
nvkm_ioctl_sclass(struct nvkm_client * client,struct nvkm_object * object,void * data,u32 size)60 nvkm_ioctl_sclass(struct nvkm_client *client,
61 struct nvkm_object *object, void *data, u32 size)
62 {
63 union {
64 struct nvif_ioctl_sclass_v0 v0;
65 } *args = data;
66 struct nvkm_oclass oclass = { .client = client };
67 int ret = -ENOSYS, i = 0;
68
69 nvif_ioctl(object, "sclass size %d\n", size);
70 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
71 nvif_ioctl(object, "sclass vers %d count %d\n",
72 args->v0.version, args->v0.count);
73 if (size != args->v0.count * sizeof(args->v0.oclass[0]))
74 return -EINVAL;
75
76 while (nvkm_ioctl_sclass_(object, i, &oclass) >= 0) {
77 if (i < args->v0.count) {
78 args->v0.oclass[i].oclass = oclass.base.oclass;
79 args->v0.oclass[i].minver = oclass.base.minver;
80 args->v0.oclass[i].maxver = oclass.base.maxver;
81 }
82 i++;
83 }
84
85 args->v0.count = i;
86 }
87
88 return ret;
89 }
90
91 static int
nvkm_ioctl_new(struct nvkm_client * client,struct nvkm_object * parent,void * data,u32 size)92 nvkm_ioctl_new(struct nvkm_client *client,
93 struct nvkm_object *parent, void *data, u32 size)
94 {
95 union {
96 struct nvif_ioctl_new_v0 v0;
97 } *args = data;
98 struct nvkm_object *object = NULL;
99 struct nvkm_oclass oclass;
100 int ret = -ENOSYS, i = 0;
101
102 nvif_ioctl(parent, "new size %d\n", size);
103 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
104 nvif_ioctl(parent, "new vers %d handle %08x class %08x object %016llx\n",
105 args->v0.version, args->v0.handle, args->v0.oclass,
106 args->v0.object);
107 } else
108 return ret;
109
110 if (!parent->func->sclass && !parent->func->uevent) {
111 nvif_ioctl(parent, "cannot have children\n");
112 return -EINVAL;
113 }
114
115 do {
116 memset(&oclass, 0x00, sizeof(oclass));
117 oclass.handle = args->v0.handle;
118 oclass.object = args->v0.object;
119 oclass.client = client;
120 oclass.parent = parent;
121 ret = nvkm_ioctl_sclass_(parent, i++, &oclass);
122 if (ret)
123 return ret;
124 } while (oclass.base.oclass != args->v0.oclass);
125
126 if (oclass.engine) {
127 oclass.engine = nvkm_engine_ref(oclass.engine);
128 if (IS_ERR(oclass.engine))
129 return PTR_ERR(oclass.engine);
130 }
131
132 ret = oclass.ctor(&oclass, data, size, &object);
133 nvkm_engine_unref(&oclass.engine);
134 if (ret == 0) {
135 ret = nvkm_object_init(object);
136 if (ret == 0) {
137 list_add_tail(&object->head, &parent->tree);
138 if (nvkm_object_insert(object)) {
139 client->data = object;
140 return 0;
141 }
142 ret = -EEXIST;
143 }
144 nvkm_object_fini(object, false);
145 }
146
147 nvkm_object_del(&object);
148 return ret;
149 }
150
151 static int
nvkm_ioctl_del(struct nvkm_client * client,struct nvkm_object * object,void * data,u32 size)152 nvkm_ioctl_del(struct nvkm_client *client,
153 struct nvkm_object *object, void *data, u32 size)
154 {
155 union {
156 struct nvif_ioctl_del none;
157 } *args = data;
158 int ret = -ENOSYS;
159
160 nvif_ioctl(object, "delete size %d\n", size);
161 if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
162 nvif_ioctl(object, "delete\n");
163 nvkm_object_fini(object, false);
164 nvkm_object_del(&object);
165 }
166
167 return ret ? ret : 1;
168 }
169
170 static int
nvkm_ioctl_mthd(struct nvkm_client * client,struct nvkm_object * object,void * data,u32 size)171 nvkm_ioctl_mthd(struct nvkm_client *client,
172 struct nvkm_object *object, void *data, u32 size)
173 {
174 union {
175 struct nvif_ioctl_mthd_v0 v0;
176 } *args = data;
177 int ret = -ENOSYS;
178
179 nvif_ioctl(object, "mthd size %d\n", size);
180 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
181 nvif_ioctl(object, "mthd vers %d mthd %02x\n",
182 args->v0.version, args->v0.method);
183 ret = nvkm_object_mthd(object, args->v0.method, data, size);
184 }
185
186 return ret;
187 }
188
189
190 static int
nvkm_ioctl_rd(struct nvkm_client * client,struct nvkm_object * object,void * data,u32 size)191 nvkm_ioctl_rd(struct nvkm_client *client,
192 struct nvkm_object *object, void *data, u32 size)
193 {
194 return -ENOSYS;
195 }
196
197 static int
nvkm_ioctl_wr(struct nvkm_client * client,struct nvkm_object * object,void * data,u32 size)198 nvkm_ioctl_wr(struct nvkm_client *client,
199 struct nvkm_object *object, void *data, u32 size)
200 {
201 return -ENOSYS;
202 }
203
204 static int
nvkm_ioctl_map(struct nvkm_client * client,struct nvkm_object * object,void * data,u32 size)205 nvkm_ioctl_map(struct nvkm_client *client,
206 struct nvkm_object *object, void *data, u32 size)
207 {
208 union {
209 struct nvif_ioctl_map_v0 v0;
210 } *args = data;
211 enum nvkm_object_map type;
212 int ret = -ENOSYS;
213
214 nvif_ioctl(object, "map size %d\n", size);
215 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
216 nvif_ioctl(object, "map vers %d\n", args->v0.version);
217 ret = nvkm_object_map(object, data, size, &type,
218 &args->v0.handle,
219 &args->v0.length);
220 if (type == NVKM_OBJECT_MAP_IO)
221 args->v0.type = NVIF_IOCTL_MAP_V0_IO;
222 else
223 args->v0.type = NVIF_IOCTL_MAP_V0_VA;
224 }
225
226 return ret;
227 }
228
229 static int
nvkm_ioctl_unmap(struct nvkm_client * client,struct nvkm_object * object,void * data,u32 size)230 nvkm_ioctl_unmap(struct nvkm_client *client,
231 struct nvkm_object *object, void *data, u32 size)
232 {
233 union {
234 struct nvif_ioctl_unmap none;
235 } *args = data;
236 int ret = -ENOSYS;
237
238 nvif_ioctl(object, "unmap size %d\n", size);
239 if (!(ret = nvif_unvers(ret, &data, &size, args->none))) {
240 nvif_ioctl(object, "unmap\n");
241 ret = nvkm_object_unmap(object);
242 }
243
244 return ret;
245 }
246
247 static struct {
248 int version;
249 int (*func)(struct nvkm_client *, struct nvkm_object *, void *, u32);
250 }
251 nvkm_ioctl_v0[] = {
252 { 0x00, nvkm_ioctl_nop },
253 { 0x00, nvkm_ioctl_sclass },
254 { 0x00, nvkm_ioctl_new },
255 { 0x00, nvkm_ioctl_del },
256 { 0x00, nvkm_ioctl_mthd },
257 { 0x00, nvkm_ioctl_rd },
258 { 0x00, nvkm_ioctl_wr },
259 { 0x00, nvkm_ioctl_map },
260 { 0x00, nvkm_ioctl_unmap },
261 };
262
263 static int
nvkm_ioctl_path(struct nvkm_client * client,u64 handle,u32 type,void * data,u32 size)264 nvkm_ioctl_path(struct nvkm_client *client, u64 handle, u32 type,
265 void *data, u32 size)
266 {
267 struct nvkm_object *object;
268 int ret;
269
270 object = nvkm_object_search(client, handle, NULL);
271 if (IS_ERR(object)) {
272 nvif_ioctl(&client->object, "object not found\n");
273 return PTR_ERR(object);
274 }
275
276 if (ret = -EINVAL, type < ARRAY_SIZE(nvkm_ioctl_v0)) {
277 if (nvkm_ioctl_v0[type].version == 0)
278 ret = nvkm_ioctl_v0[type].func(client, object, data, size);
279 }
280
281 return ret;
282 }
283
284 int
nvkm_ioctl(struct nvkm_client * client,void * data,u32 size,void ** hack)285 nvkm_ioctl(struct nvkm_client *client, void *data, u32 size, void **hack)
286 {
287 struct nvkm_object *object = &client->object;
288 union {
289 struct nvif_ioctl_v0 v0;
290 } *args = data;
291 int ret = -ENOSYS;
292
293 nvif_ioctl(object, "size %d\n", size);
294
295 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
296 nvif_ioctl(object,
297 "vers %d type %02x object %016llx owner %02x\n",
298 args->v0.version, args->v0.type, args->v0.object,
299 args->v0.owner);
300 ret = nvkm_ioctl_path(client, args->v0.object, args->v0.type,
301 data, size);
302 }
303
304 if (ret != 1) {
305 nvif_ioctl(object, "return %d\n", ret);
306 if (hack) {
307 *hack = client->data;
308 client->data = NULL;
309 }
310 }
311
312 return ret;
313 }
314