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
25 #include <nvif/object.h>
26 #include <nvif/client.h>
27 #include <nvif/driver.h>
28 #include <nvif/ioctl.h>
29
30 int
nvif_object_ioctl(struct nvif_object * object,void * data,u32 size,void ** hack)31 nvif_object_ioctl(struct nvif_object *object, void *data, u32 size, void **hack)
32 {
33 struct nvif_client *client = object->client;
34 union {
35 struct nvif_ioctl_v0 v0;
36 } *args = data;
37
38 if (size >= sizeof(*args) && args->v0.version == 0) {
39 if (object != &client->object)
40 args->v0.object = nvif_handle(object);
41 else
42 args->v0.object = 0;
43 args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
44 } else
45 return -ENOSYS;
46
47 return client->driver->ioctl(client->object.priv, data, size, hack);
48 }
49
50 void
nvif_object_sclass_put(struct nvif_sclass ** psclass)51 nvif_object_sclass_put(struct nvif_sclass **psclass)
52 {
53 kfree(*psclass);
54 *psclass = NULL;
55 }
56
57 int
nvif_object_sclass_get(struct nvif_object * object,struct nvif_sclass ** psclass)58 nvif_object_sclass_get(struct nvif_object *object, struct nvif_sclass **psclass)
59 {
60 struct {
61 struct nvif_ioctl_v0 ioctl;
62 struct nvif_ioctl_sclass_v0 sclass;
63 } *args = NULL;
64 int ret, cnt = 0, i;
65 u32 size;
66
67 while (1) {
68 size = sizeof(*args) + cnt * sizeof(args->sclass.oclass[0]);
69 if (!(args = kmalloc(size, GFP_KERNEL)))
70 return -ENOMEM;
71 args->ioctl.version = 0;
72 args->ioctl.type = NVIF_IOCTL_V0_SCLASS;
73 args->sclass.version = 0;
74 args->sclass.count = cnt;
75
76 ret = nvif_object_ioctl(object, args, size, NULL);
77 if (ret == 0 && args->sclass.count <= cnt)
78 break;
79 cnt = args->sclass.count;
80 kfree(args);
81 if (ret != 0)
82 return ret;
83 }
84
85 *psclass = kcalloc(args->sclass.count, sizeof(**psclass), GFP_KERNEL);
86 if (*psclass) {
87 for (i = 0; i < args->sclass.count; i++) {
88 (*psclass)[i].oclass = args->sclass.oclass[i].oclass;
89 (*psclass)[i].minver = args->sclass.oclass[i].minver;
90 (*psclass)[i].maxver = args->sclass.oclass[i].maxver;
91 }
92 ret = args->sclass.count;
93 } else {
94 ret = -ENOMEM;
95 }
96
97 kfree(args);
98 return ret;
99 }
100
101 u32
nvif_object_rd(struct nvif_object * object,int size,u64 addr)102 nvif_object_rd(struct nvif_object *object, int size, u64 addr)
103 {
104 struct {
105 struct nvif_ioctl_v0 ioctl;
106 struct nvif_ioctl_rd_v0 rd;
107 } args = {
108 .ioctl.type = NVIF_IOCTL_V0_RD,
109 .rd.size = size,
110 .rd.addr = addr,
111 };
112 int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
113 if (ret) {
114 /*XXX: warn? */
115 return 0;
116 }
117 return args.rd.data;
118 }
119
120 void
nvif_object_wr(struct nvif_object * object,int size,u64 addr,u32 data)121 nvif_object_wr(struct nvif_object *object, int size, u64 addr, u32 data)
122 {
123 struct {
124 struct nvif_ioctl_v0 ioctl;
125 struct nvif_ioctl_wr_v0 wr;
126 } args = {
127 .ioctl.type = NVIF_IOCTL_V0_WR,
128 .wr.size = size,
129 .wr.addr = addr,
130 .wr.data = data,
131 };
132 int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
133 if (ret) {
134 /*XXX: warn? */
135 }
136 }
137
138 int
nvif_object_mthd(struct nvif_object * object,u32 mthd,void * data,u32 size)139 nvif_object_mthd(struct nvif_object *object, u32 mthd, void *data, u32 size)
140 {
141 struct {
142 struct nvif_ioctl_v0 ioctl;
143 struct nvif_ioctl_mthd_v0 mthd;
144 } *args;
145 u8 stack[128];
146 int ret;
147
148 if (sizeof(*args) + size > sizeof(stack)) {
149 if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL)))
150 return -ENOMEM;
151 } else {
152 args = (void *)stack;
153 }
154 args->ioctl.version = 0;
155 args->ioctl.type = NVIF_IOCTL_V0_MTHD;
156 args->mthd.version = 0;
157 args->mthd.method = mthd;
158
159 memcpy(args->mthd.data, data, size);
160 ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL);
161 memcpy(data, args->mthd.data, size);
162 if (args != (void *)stack)
163 kfree(args);
164 return ret;
165 }
166
167 void
nvif_object_unmap_handle(struct nvif_object * object)168 nvif_object_unmap_handle(struct nvif_object *object)
169 {
170 struct {
171 struct nvif_ioctl_v0 ioctl;
172 struct nvif_ioctl_unmap unmap;
173 } args = {
174 .ioctl.type = NVIF_IOCTL_V0_UNMAP,
175 };
176
177 nvif_object_ioctl(object, &args, sizeof(args), NULL);
178 }
179
180 int
nvif_object_map_handle(struct nvif_object * object,void * argv,u32 argc,u64 * handle,u64 * length)181 nvif_object_map_handle(struct nvif_object *object, void *argv, u32 argc,
182 u64 *handle, u64 *length)
183 {
184 struct {
185 struct nvif_ioctl_v0 ioctl;
186 struct nvif_ioctl_map_v0 map;
187 } *args;
188 u32 argn = sizeof(*args) + argc;
189 int ret, maptype;
190
191 if (!(args = kzalloc(argn, GFP_KERNEL)))
192 return -ENOMEM;
193 args->ioctl.type = NVIF_IOCTL_V0_MAP;
194 memcpy(args->map.data, argv, argc);
195
196 ret = nvif_object_ioctl(object, args, argn, NULL);
197 *handle = args->map.handle;
198 *length = args->map.length;
199 maptype = args->map.type;
200 kfree(args);
201 return ret ? ret : (maptype == NVIF_IOCTL_MAP_V0_IO);
202 }
203
204 void
nvif_object_unmap(struct nvif_object * object)205 nvif_object_unmap(struct nvif_object *object)
206 {
207 struct nvif_client *client = object->client;
208 if (object->map.ptr) {
209 if (object->map.size) {
210 client->driver->unmap(client, object->map.ptr,
211 object->map.size);
212 object->map.size = 0;
213 }
214 object->map.ptr = NULL;
215 nvif_object_unmap_handle(object);
216 }
217 }
218
219 int
nvif_object_map(struct nvif_object * object,void * argv,u32 argc)220 nvif_object_map(struct nvif_object *object, void *argv, u32 argc)
221 {
222 struct nvif_client *client = object->client;
223 u64 handle, length;
224 int ret = nvif_object_map_handle(object, argv, argc, &handle, &length);
225 if (ret >= 0) {
226 if (ret) {
227 object->map.ptr = client->driver->map(client,
228 handle,
229 length);
230 if (ret = -ENOMEM, object->map.ptr) {
231 object->map.size = length;
232 return 0;
233 }
234 } else {
235 object->map.ptr = (void *)(unsigned long)handle;
236 return 0;
237 }
238 nvif_object_unmap_handle(object);
239 }
240 return ret;
241 }
242
243 void
nvif_object_dtor(struct nvif_object * object)244 nvif_object_dtor(struct nvif_object *object)
245 {
246 struct {
247 struct nvif_ioctl_v0 ioctl;
248 struct nvif_ioctl_del del;
249 } args = {
250 .ioctl.type = NVIF_IOCTL_V0_DEL,
251 };
252
253 if (!nvif_object_constructed(object))
254 return;
255
256 nvif_object_unmap(object);
257 nvif_object_ioctl(object, &args, sizeof(args), NULL);
258 object->client = NULL;
259 }
260
261 int
nvif_object_ctor(struct nvif_object * parent,const char * name,u32 handle,s32 oclass,void * data,u32 size,struct nvif_object * object)262 nvif_object_ctor(struct nvif_object *parent, const char *name, u32 handle,
263 s32 oclass, void *data, u32 size, struct nvif_object *object)
264 {
265 struct {
266 struct nvif_ioctl_v0 ioctl;
267 struct nvif_ioctl_new_v0 new;
268 } *args;
269 int ret = 0;
270
271 object->client = NULL;
272 object->name = name ? name : "nvifObject";
273 object->handle = handle;
274 object->oclass = oclass;
275 object->map.ptr = NULL;
276 object->map.size = 0;
277
278 if (parent) {
279 if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) {
280 nvif_object_dtor(object);
281 return -ENOMEM;
282 }
283
284 object->parent = parent->parent;
285
286 args->ioctl.version = 0;
287 args->ioctl.type = NVIF_IOCTL_V0_NEW;
288 args->new.version = 0;
289 args->new.route = parent->client->route;
290 args->new.token = nvif_handle(object);
291 args->new.object = nvif_handle(object);
292 args->new.handle = handle;
293 args->new.oclass = oclass;
294
295 memcpy(args->new.data, data, size);
296 ret = nvif_object_ioctl(parent, args, sizeof(*args) + size,
297 &object->priv);
298 memcpy(data, args->new.data, size);
299 kfree(args);
300 if (ret == 0)
301 object->client = parent->client;
302 }
303
304 if (ret)
305 nvif_object_dtor(object);
306 return ret;
307 }
308