Linux 4.2.1
[linux/fpc-iii.git] / drivers / gpu / drm / nouveau / nvif / object.c
blob3ab4e2f8cc12ef8b6b930304bc2d4c2cf2b801f4
1 /*
2 * Copyright 2014 Red Hat Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
22 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 #include <nvif/object.h>
26 #include <nvif/client.h>
27 #include <nvif/driver.h>
28 #include <nvif/ioctl.h>
30 int
31 nvif_object_ioctl(struct nvif_object *object, void *data, u32 size, void **hack)
33 struct nvif_client *client = nvif_client(object);
34 union {
35 struct nvif_ioctl_v0 v0;
36 } *args = data;
38 if (size >= sizeof(*args) && args->v0.version == 0) {
39 args->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
40 args->v0.path_nr = 0;
41 while (args->v0.path_nr < ARRAY_SIZE(args->v0.path)) {
42 args->v0.path[args->v0.path_nr++] = object->handle;
43 if (object->parent == object)
44 break;
45 object = object->parent;
47 } else
48 return -ENOSYS;
50 return client->driver->ioctl(client->base.priv, client->super, data, size, hack);
53 int
54 nvif_object_sclass(struct nvif_object *object, u32 *oclass, int count)
56 struct {
57 struct nvif_ioctl_v0 ioctl;
58 struct nvif_ioctl_sclass_v0 sclass;
59 } *args;
60 u32 size = count * sizeof(args->sclass.oclass[0]);
61 int ret;
63 if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL)))
64 return -ENOMEM;
65 args->ioctl.version = 0;
66 args->ioctl.type = NVIF_IOCTL_V0_SCLASS;
67 args->sclass.version = 0;
68 args->sclass.count = count;
70 memcpy(args->sclass.oclass, oclass, size);
71 ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL);
72 ret = ret ? ret : args->sclass.count;
73 memcpy(oclass, args->sclass.oclass, size);
74 kfree(args);
75 return ret;
78 u32
79 nvif_object_rd(struct nvif_object *object, int size, u64 addr)
81 struct {
82 struct nvif_ioctl_v0 ioctl;
83 struct nvif_ioctl_rd_v0 rd;
84 } args = {
85 .ioctl.type = NVIF_IOCTL_V0_RD,
86 .rd.size = size,
87 .rd.addr = addr,
89 int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
90 if (ret) {
91 /*XXX: warn? */
92 return 0;
94 return args.rd.data;
97 void
98 nvif_object_wr(struct nvif_object *object, int size, u64 addr, u32 data)
100 struct {
101 struct nvif_ioctl_v0 ioctl;
102 struct nvif_ioctl_wr_v0 wr;
103 } args = {
104 .ioctl.type = NVIF_IOCTL_V0_WR,
105 .wr.size = size,
106 .wr.addr = addr,
107 .wr.data = data,
109 int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
110 if (ret) {
111 /*XXX: warn? */
116 nvif_object_mthd(struct nvif_object *object, u32 mthd, void *data, u32 size)
118 struct {
119 struct nvif_ioctl_v0 ioctl;
120 struct nvif_ioctl_mthd_v0 mthd;
121 } *args;
122 u8 stack[128];
123 int ret;
125 if (sizeof(*args) + size > sizeof(stack)) {
126 if (!(args = kmalloc(sizeof(*args) + size, GFP_KERNEL)))
127 return -ENOMEM;
128 } else {
129 args = (void *)stack;
131 args->ioctl.version = 0;
132 args->ioctl.type = NVIF_IOCTL_V0_MTHD;
133 args->mthd.version = 0;
134 args->mthd.method = mthd;
136 memcpy(args->mthd.data, data, size);
137 ret = nvif_object_ioctl(object, args, sizeof(*args) + size, NULL);
138 memcpy(data, args->mthd.data, size);
139 if (args != (void *)stack)
140 kfree(args);
141 return ret;
144 void
145 nvif_object_unmap(struct nvif_object *object)
147 if (object->map.size) {
148 struct nvif_client *client = nvif_client(object);
149 struct {
150 struct nvif_ioctl_v0 ioctl;
151 struct nvif_ioctl_unmap unmap;
152 } args = {
153 .ioctl.type = NVIF_IOCTL_V0_UNMAP,
156 if (object->map.ptr) {
157 client->driver->unmap(client, object->map.ptr,
158 object->map.size);
159 object->map.ptr = NULL;
162 nvif_object_ioctl(object, &args, sizeof(args), NULL);
163 object->map.size = 0;
168 nvif_object_map(struct nvif_object *object)
170 struct nvif_client *client = nvif_client(object);
171 struct {
172 struct nvif_ioctl_v0 ioctl;
173 struct nvif_ioctl_map_v0 map;
174 } args = {
175 .ioctl.type = NVIF_IOCTL_V0_MAP,
177 int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
178 if (ret == 0) {
179 object->map.size = args.map.length;
180 object->map.ptr = client->driver->map(client, args.map.handle,
181 object->map.size);
182 if (ret = -ENOMEM, object->map.ptr)
183 return 0;
184 nvif_object_unmap(object);
186 return ret;
189 struct ctor {
190 struct nvif_ioctl_v0 ioctl;
191 struct nvif_ioctl_new_v0 new;
194 void
195 nvif_object_fini(struct nvif_object *object)
197 struct ctor *ctor = container_of(object->data, typeof(*ctor), new.data);
198 if (object->parent) {
199 struct {
200 struct nvif_ioctl_v0 ioctl;
201 struct nvif_ioctl_del del;
202 } args = {
203 .ioctl.type = NVIF_IOCTL_V0_DEL,
206 nvif_object_unmap(object);
207 nvif_object_ioctl(object, &args, sizeof(args), NULL);
208 if (object->data) {
209 object->size = 0;
210 object->data = NULL;
211 kfree(ctor);
213 nvif_object_ref(NULL, &object->parent);
218 nvif_object_init(struct nvif_object *parent, void (*dtor)(struct nvif_object *),
219 u32 handle, u32 oclass, void *data, u32 size,
220 struct nvif_object *object)
222 struct ctor *ctor;
223 int ret = 0;
225 object->parent = NULL;
226 object->object = object;
227 nvif_object_ref(parent, &object->parent);
228 kref_init(&object->refcount);
229 object->handle = handle;
230 object->oclass = oclass;
231 object->data = NULL;
232 object->size = 0;
233 object->dtor = dtor;
234 object->map.ptr = NULL;
235 object->map.size = 0;
237 if (object->parent) {
238 if (!(ctor = kmalloc(sizeof(*ctor) + size, GFP_KERNEL))) {
239 nvif_object_fini(object);
240 return -ENOMEM;
242 object->data = ctor->new.data;
243 object->size = size;
244 memcpy(object->data, data, size);
246 ctor->ioctl.version = 0;
247 ctor->ioctl.type = NVIF_IOCTL_V0_NEW;
248 ctor->new.version = 0;
249 ctor->new.route = NVIF_IOCTL_V0_ROUTE_NVIF;
250 ctor->new.token = (unsigned long)(void *)object;
251 ctor->new.handle = handle;
252 ctor->new.oclass = oclass;
254 ret = nvif_object_ioctl(parent, ctor, sizeof(*ctor) +
255 object->size, &object->priv);
258 if (ret)
259 nvif_object_fini(object);
260 return ret;
263 static void
264 nvif_object_del(struct nvif_object *object)
266 nvif_object_fini(object);
267 kfree(object);
271 nvif_object_new(struct nvif_object *parent, u32 handle, u32 oclass,
272 void *data, u32 size, struct nvif_object **pobject)
274 struct nvif_object *object = kzalloc(sizeof(*object), GFP_KERNEL);
275 if (object) {
276 int ret = nvif_object_init(parent, nvif_object_del, handle,
277 oclass, data, size, object);
278 if (ret) {
279 kfree(object);
280 object = NULL;
282 *pobject = object;
283 return ret;
285 return -ENOMEM;
288 static void
289 nvif_object_put(struct kref *kref)
291 struct nvif_object *object =
292 container_of(kref, typeof(*object), refcount);
293 object->dtor(object);
296 void
297 nvif_object_ref(struct nvif_object *object, struct nvif_object **pobject)
299 if (object)
300 kref_get(&object->refcount);
301 if (*pobject)
302 kref_put(&(*pobject)->refcount, nvif_object_put);
303 *pobject = object;