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, client->super,
48 data, size, hack);
49 }
50
51 void
nvif_object_sclass_put(struct nvif_sclass ** psclass)52 nvif_object_sclass_put(struct nvif_sclass **psclass)
53 {
54 kfree(*psclass);
55 *psclass = NULL;
56 }
57
58 int
nvif_object_sclass_get(struct nvif_object * object,struct nvif_sclass ** psclass)59 nvif_object_sclass_get(struct nvif_object *object, struct nvif_sclass **psclass)
60 {
61 struct {
62 struct nvif_ioctl_v0 ioctl;
63 struct nvif_ioctl_sclass_v0 sclass;
64 } *args = NULL;
65 int ret, cnt = 0, i;
66 u32 size;
67
68 while (1) {
69 size = sizeof(*args) + cnt * sizeof(args->sclass.oclass[0]);
70 if (!(args = kmalloc(size, GFP_KERNEL)))
71 return -ENOMEM;
72 args->ioctl.version = 0;
73 args->ioctl.type = NVIF_IOCTL_V0_SCLASS;
74 args->sclass.version = 0;
75 args->sclass.count = cnt;
76
77 ret = nvif_object_ioctl(object, args, size, NULL);
78 if (ret == 0 && args->sclass.count <= cnt)
79 break;
80 cnt = args->sclass.count;
81 kfree(args);
82 if (ret != 0)
83 return ret;
84 }
85
86 *psclass = kcalloc(args->sclass.count, sizeof(**psclass), GFP_KERNEL);
87 if (*psclass) {
88 for (i = 0; i < args->sclass.count; i++) {
89 (*psclass)[i].oclass = args->sclass.oclass[i].oclass;
90 (*psclass)[i].minver = args->sclass.oclass[i].minver;
91 (*psclass)[i].maxver = args->sclass.oclass[i].maxver;
92 }
93 ret = args->sclass.count;
94 } else {
95 ret = -ENOMEM;
96 }
97
98 kfree(args);
99 return ret;
100 }
101
102 u32
nvif_object_rd(struct nvif_object * object,int size,u64 addr)103 nvif_object_rd(struct nvif_object *object, int size, u64 addr)
104 {
105 struct {
106 struct nvif_ioctl_v0 ioctl;
107 struct nvif_ioctl_rd_v0 rd;
108 } args = {
109 .ioctl.type = NVIF_IOCTL_V0_RD,
110 .rd.size = size,
111 .rd.addr = addr,
112 };
113 int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
114 if (ret) {
115 /*XXX: warn? */
116 return 0;
117 }
118 return args.rd.data;
119 }
120
121 void
nvif_object_wr(struct nvif_object * object,int size,u64 addr,u32 data)122 nvif_object_wr(struct nvif_object *object, int size, u64 addr, u32 data)
123 {
124 struct {
125 struct nvif_ioctl_v0 ioctl;
126 struct nvif_ioctl_wr_v0 wr;
127 } args = {
128 .ioctl.type = NVIF_IOCTL_V0_WR,
129 .wr.size = size,
130 .wr.addr = addr,
131 .wr.data = data,
132 };
133 int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
134 if (ret) {
135 /*XXX: warn? */
136 }
137 }
138
139 int
nvif_object_mthd(struct nvif_object * object,u32 mthd,void * data,u32 size)140 nvif_object_mthd(struct nvif_object *object, u32 mthd, void *data, u32 size)
141 {
142 struct {
143 struct nvif_ioctl_v0 ioctl;
144 struct nvif_ioctl_mthd_v0 mthd;
145 } *args;
146 u8 stack[128];
147 int ret;
148
149 if (sizeof(*args) + size > sizeof(stack)) {
150 if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL)))
151 return -ENOMEM;
152 } else {
153 args = (void *)stack;
154 }
155 args->ioctl.version = 0;
156 args->ioctl.type = NVIF_IOCTL_V0_MTHD;
157 args->mthd.version = 0;
158 args->mthd.method = mthd;
159
160 memcpy(args->mthd.data, data, size);
161 ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL);
162 memcpy(data, args->mthd.data, size);
163 if (args != (void *)stack)
164 kfree(args);
165 return ret;
166 }
167
168 void
nvif_object_unmap_handle(struct nvif_object * object)169 nvif_object_unmap_handle(struct nvif_object *object)
170 {
171 struct {
172 struct nvif_ioctl_v0 ioctl;
173 struct nvif_ioctl_unmap unmap;
174 } args = {
175 .ioctl.type = NVIF_IOCTL_V0_UNMAP,
176 };
177
178 nvif_object_ioctl(object, &args, sizeof(args), NULL);
179 }
180
181 int
nvif_object_map_handle(struct nvif_object * object,void * argv,u32 argc,u64 * handle,u64 * length)182 nvif_object_map_handle(struct nvif_object *object, void *argv, u32 argc,
183 u64 *handle, u64 *length)
184 {
185 struct {
186 struct nvif_ioctl_v0 ioctl;
187 struct nvif_ioctl_map_v0 map;
188 } *args;
189 u32 argn = sizeof(*args) + argc;
190 int ret, maptype;
191
192 if (!(args = kzalloc(argn, GFP_KERNEL)))
193 return -ENOMEM;
194 args->ioctl.type = NVIF_IOCTL_V0_MAP;
195 memcpy(args->map.data, argv, argc);
196
197 ret = nvif_object_ioctl(object, args, argn, NULL);
198 *handle = args->map.handle;
199 *length = args->map.length;
200 maptype = args->map.type;
201 kfree(args);
202 return ret ? ret : (maptype == NVIF_IOCTL_MAP_V0_IO);
203 }
204
205 void
nvif_object_unmap(struct nvif_object * object)206 nvif_object_unmap(struct nvif_object *object)
207 {
208 struct nvif_client *client = object->client;
209 if (object->map.ptr) {
210 if (object->map.size) {
211 client->driver->unmap(client, object->map.ptr,
212 object->map.size);
213 object->map.size = 0;
214 }
215 object->map.ptr = NULL;
216 nvif_object_unmap_handle(object);
217 }
218 }
219
220 int
nvif_object_map(struct nvif_object * object,void * argv,u32 argc)221 nvif_object_map(struct nvif_object *object, void *argv, u32 argc)
222 {
223 struct nvif_client *client = object->client;
224 u64 handle, length;
225 int ret = nvif_object_map_handle(object, argv, argc, &handle, &length);
226 if (ret >= 0) {
227 if (ret) {
228 object->map.ptr = client->driver->map(client,
229 handle,
230 length);
231 if (ret = -ENOMEM, object->map.ptr) {
232 object->map.size = length;
233 return 0;
234 }
235 } else {
236 object->map.ptr = (void *)(unsigned long)handle;
237 return 0;
238 }
239 nvif_object_unmap_handle(object);
240 }
241 return ret;
242 }
243
244 void
nvif_object_dtor(struct nvif_object * object)245 nvif_object_dtor(struct nvif_object *object)
246 {
247 struct {
248 struct nvif_ioctl_v0 ioctl;
249 struct nvif_ioctl_del del;
250 } args = {
251 .ioctl.type = NVIF_IOCTL_V0_DEL,
252 };
253
254 if (!object->client)
255 return;
256
257 nvif_object_unmap(object);
258 nvif_object_ioctl(object, &args, sizeof(args), NULL);
259 object->client = NULL;
260 }
261
262 int
nvif_object_ctor(struct nvif_object * parent,const char * name,u32 handle,s32 oclass,void * data,u32 size,struct nvif_object * object)263 nvif_object_ctor(struct nvif_object *parent, const char *name, u32 handle,
264 s32 oclass, void *data, u32 size, struct nvif_object *object)
265 {
266 struct {
267 struct nvif_ioctl_v0 ioctl;
268 struct nvif_ioctl_new_v0 new;
269 } *args;
270 int ret = 0;
271
272 object->client = NULL;
273 object->name = name ? name : "nvifObject";
274 object->handle = handle;
275 object->oclass = oclass;
276 object->map.ptr = NULL;
277 object->map.size = 0;
278
279 if (parent) {
280 if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL))) {
281 nvif_object_dtor(object);
282 return -ENOMEM;
283 }
284
285 object->parent = parent->parent;
286
287 args->ioctl.version = 0;
288 args->ioctl.type = NVIF_IOCTL_V0_NEW;
289 args->new.version = 0;
290 args->new.route = parent->client->route;
291 args->new.token = nvif_handle(object);
292 args->new.object = nvif_handle(object);
293 args->new.handle = handle;
294 args->new.oclass = oclass;
295
296 memcpy(args->new.data, data, size);
297 ret = nvif_object_ioctl(parent, args, sizeof(*args) + size,
298 &object->priv);
299 memcpy(data, args->new.data, size);
300 kfree(args);
301 if (ret == 0)
302 object->client = parent->client;
303 }
304
305 if (ret)
306 nvif_object_dtor(object);
307 return ret;
308 }
309
