2 * Copyright 2012 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.
25 #include <core/object.h>
26 #include <core/namedb.h>
27 #include <core/handle.h>
28 #include <core/client.h>
29 #include <core/engctx.h>
31 #include <subdev/vm.h>
34 nouveau_engctx_exists(struct nouveau_object *parent,
35 struct nouveau_engine *engine, void **pobject)
37 struct nouveau_engctx *engctx;
38 struct nouveau_object *parctx;
40 list_for_each_entry(engctx, &engine->contexts, head) {
41 parctx = nv_pclass(nv_object(engctx), NV_PARENT_CLASS);
42 if (parctx == parent) {
43 atomic_inc(&nv_object(engctx)->refcount);
53 nouveau_engctx_create_(struct nouveau_object *parent,
54 struct nouveau_object *engobj,
55 struct nouveau_oclass *oclass,
56 struct nouveau_object *pargpu,
57 u32 size, u32 align, u32 flags,
58 int length, void **pobject)
60 struct nouveau_client *client = nouveau_client(parent);
61 struct nouveau_engine *engine = nv_engine(engobj);
62 struct nouveau_object *engctx;
66 /* check if this engine already has a context for the parent object,
67 * and reference it instead of creating a new one
69 spin_lock_irqsave(&engine->lock, save);
70 ret = nouveau_engctx_exists(parent, engine, pobject);
71 spin_unlock_irqrestore(&engine->lock, save);
75 /* create the new context, supports creating both raw objects and
76 * objects backed by instance memory
79 ret = nouveau_gpuobj_create_(parent, engobj, oclass,
81 pargpu, size, align, flags,
84 ret = nouveau_object_create_(parent, engobj, oclass,
85 NV_ENGCTX_CLASS, length, pobject);
92 /* must take the lock again and re-check a context doesn't already
93 * exist (in case of a race) - the lock had to be dropped before as
94 * it's not possible to allocate the object with it held.
96 spin_lock_irqsave(&engine->lock, save);
97 ret = nouveau_engctx_exists(parent, engine, pobject);
99 spin_unlock_irqrestore(&engine->lock, save);
100 nouveau_object_ref(NULL, &engctx);
105 atomic_inc(&client->vm->engref[nv_engidx(engobj)]);
106 list_add(&nv_engctx(engctx)->head, &engine->contexts);
107 nv_engctx(engctx)->addr = ~0ULL;
108 spin_unlock_irqrestore(&engine->lock, save);
113 nouveau_engctx_destroy(struct nouveau_engctx *engctx)
115 struct nouveau_object *engobj = nv_object(engctx)->engine;
116 struct nouveau_engine *engine = nv_engine(engobj);
117 struct nouveau_client *client = nouveau_client(engctx);
120 nouveau_gpuobj_unmap(&engctx->vma);
121 spin_lock_irqsave(&engine->lock, save);
122 list_del(&engctx->head);
123 spin_unlock_irqrestore(&engine->lock, save);
126 atomic_dec(&client->vm->engref[nv_engidx(engobj)]);
128 if (engctx->base.size)
129 nouveau_gpuobj_destroy(&engctx->base);
131 nouveau_object_destroy(&engctx->base.base);
135 nouveau_engctx_init(struct nouveau_engctx *engctx)
137 struct nouveau_object *object = nv_object(engctx);
138 struct nouveau_subdev *subdev = nv_subdev(object->engine);
139 struct nouveau_object *parent;
140 struct nouveau_subdev *pardev;
143 ret = nouveau_gpuobj_init(&engctx->base);
147 parent = nv_pclass(object->parent, NV_PARENT_CLASS);
148 pardev = nv_subdev(parent->engine);
149 if (nv_parent(parent)->context_attach) {
150 mutex_lock(&pardev->mutex);
151 ret = nv_parent(parent)->context_attach(parent, object);
152 mutex_unlock(&pardev->mutex);
156 nv_error(parent, "failed to attach %s context, %d\n",
161 nv_debug(parent, "attached %s context\n", subdev->name);
166 nouveau_engctx_fini(struct nouveau_engctx *engctx, bool suspend)
168 struct nouveau_object *object = nv_object(engctx);
169 struct nouveau_subdev *subdev = nv_subdev(object->engine);
170 struct nouveau_object *parent;
171 struct nouveau_subdev *pardev;
174 parent = nv_pclass(object->parent, NV_PARENT_CLASS);
175 pardev = nv_subdev(parent->engine);
176 if (nv_parent(parent)->context_detach) {
177 mutex_lock(&pardev->mutex);
178 ret = nv_parent(parent)->context_detach(parent, suspend, object);
179 mutex_unlock(&pardev->mutex);
183 nv_error(parent, "failed to detach %s context, %d\n",
188 nv_debug(parent, "detached %s context\n", subdev->name);
189 return nouveau_gpuobj_fini(&engctx->base, suspend);
193 _nouveau_engctx_ctor(struct nouveau_object *parent,
194 struct nouveau_object *engine,
195 struct nouveau_oclass *oclass, void *data, u32 size,
196 struct nouveau_object **pobject)
198 struct nouveau_engctx *engctx;
201 ret = nouveau_engctx_create(parent, engine, oclass, NULL, 256, 256,
202 NVOBJ_FLAG_ZERO_ALLOC, &engctx);
203 *pobject = nv_object(engctx);
208 _nouveau_engctx_dtor(struct nouveau_object *object)
210 nouveau_engctx_destroy(nv_engctx(object));
214 _nouveau_engctx_init(struct nouveau_object *object)
216 return nouveau_engctx_init(nv_engctx(object));
221 _nouveau_engctx_fini(struct nouveau_object *object, bool suspend)
223 return nouveau_engctx_fini(nv_engctx(object), suspend);
226 struct nouveau_object *
227 nouveau_engctx_get(struct nouveau_engine *engine, u64 addr)
229 struct nouveau_engctx *engctx;
232 spin_lock_irqsave(&engine->lock, flags);
233 list_for_each_entry(engctx, &engine->contexts, head) {
234 if (engctx->addr == addr) {
235 engctx->save = flags;
236 return nv_object(engctx);
239 spin_unlock_irqrestore(&engine->lock, flags);
244 nouveau_engctx_put(struct nouveau_object *object)
247 struct nouveau_engine *engine = nv_engine(object->engine);
248 struct nouveau_engctx *engctx = nv_engctx(object);
249 spin_unlock_irqrestore(&engine->lock, engctx->save);