| 1 | /* $NetBSD: nouveau_core_engctx.c,v 1.1.1.1 2014/08/06 12:36:23 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2012 Red Hat Inc. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: Ben Skeggs |
| 25 | */ |
| 26 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_core_engctx.c,v 1.1.1.1 2014/08/06 12:36:23 riastradh Exp $" ); |
| 29 | |
| 30 | #include <core/object.h> |
| 31 | #include <core/namedb.h> |
| 32 | #include <core/handle.h> |
| 33 | #include <core/client.h> |
| 34 | #include <core/engctx.h> |
| 35 | |
| 36 | #include <subdev/vm.h> |
| 37 | |
| 38 | static inline int |
| 39 | nouveau_engctx_exists(struct nouveau_object *parent, |
| 40 | struct nouveau_engine *engine, void **pobject) |
| 41 | { |
| 42 | struct nouveau_engctx *engctx; |
| 43 | struct nouveau_object *parctx; |
| 44 | |
| 45 | list_for_each_entry(engctx, &engine->contexts, head) { |
| 46 | parctx = nv_pclass(nv_object(engctx), NV_PARENT_CLASS); |
| 47 | if (parctx == parent) { |
| 48 | atomic_inc(&nv_object(engctx)->refcount); |
| 49 | *pobject = engctx; |
| 50 | return 1; |
| 51 | } |
| 52 | } |
| 53 | |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | int |
| 58 | nouveau_engctx_create_(struct nouveau_object *parent, |
| 59 | struct nouveau_object *engobj, |
| 60 | struct nouveau_oclass *oclass, |
| 61 | struct nouveau_object *pargpu, |
| 62 | u32 size, u32 align, u32 flags, |
| 63 | int length, void **pobject) |
| 64 | { |
| 65 | struct nouveau_client *client = nouveau_client(parent); |
| 66 | struct nouveau_engine *engine = nv_engine(engobj); |
| 67 | struct nouveau_object *engctx; |
| 68 | unsigned long save; |
| 69 | int ret; |
| 70 | |
| 71 | /* check if this engine already has a context for the parent object, |
| 72 | * and reference it instead of creating a new one |
| 73 | */ |
| 74 | spin_lock_irqsave(&engine->lock, save); |
| 75 | ret = nouveau_engctx_exists(parent, engine, pobject); |
| 76 | spin_unlock_irqrestore(&engine->lock, save); |
| 77 | if (ret) |
| 78 | return ret; |
| 79 | |
| 80 | /* create the new context, supports creating both raw objects and |
| 81 | * objects backed by instance memory |
| 82 | */ |
| 83 | if (size) { |
| 84 | ret = nouveau_gpuobj_create_(parent, engobj, oclass, |
| 85 | NV_ENGCTX_CLASS, |
| 86 | pargpu, size, align, flags, |
| 87 | length, pobject); |
| 88 | } else { |
| 89 | ret = nouveau_object_create_(parent, engobj, oclass, |
| 90 | NV_ENGCTX_CLASS, length, pobject); |
| 91 | } |
| 92 | |
| 93 | engctx = *pobject; |
| 94 | if (ret) |
| 95 | return ret; |
| 96 | |
| 97 | /* must take the lock again and re-check a context doesn't already |
| 98 | * exist (in case of a race) - the lock had to be dropped before as |
| 99 | * it's not possible to allocate the object with it held. |
| 100 | */ |
| 101 | spin_lock_irqsave(&engine->lock, save); |
| 102 | ret = nouveau_engctx_exists(parent, engine, pobject); |
| 103 | if (ret) { |
| 104 | spin_unlock_irqrestore(&engine->lock, save); |
| 105 | nouveau_object_ref(NULL, &engctx); |
| 106 | return ret; |
| 107 | } |
| 108 | |
| 109 | if (client->vm) |
| 110 | atomic_inc(&client->vm->engref[nv_engidx(engobj)]); |
| 111 | list_add(&nv_engctx(engctx)->head, &engine->contexts); |
| 112 | nv_engctx(engctx)->addr = ~0ULL; |
| 113 | spin_unlock_irqrestore(&engine->lock, save); |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | void |
| 118 | nouveau_engctx_destroy(struct nouveau_engctx *engctx) |
| 119 | { |
| 120 | struct nouveau_object *engobj = nv_object(engctx)->engine; |
| 121 | struct nouveau_engine *engine = nv_engine(engobj); |
| 122 | struct nouveau_client *client = nouveau_client(engctx); |
| 123 | unsigned long save; |
| 124 | |
| 125 | nouveau_gpuobj_unmap(&engctx->vma); |
| 126 | spin_lock_irqsave(&engine->lock, save); |
| 127 | list_del(&engctx->head); |
| 128 | spin_unlock_irqrestore(&engine->lock, save); |
| 129 | |
| 130 | if (client->vm) |
| 131 | atomic_dec(&client->vm->engref[nv_engidx(engobj)]); |
| 132 | |
| 133 | if (engctx->base.size) |
| 134 | nouveau_gpuobj_destroy(&engctx->base); |
| 135 | else |
| 136 | nouveau_object_destroy(&engctx->base.base); |
| 137 | } |
| 138 | |
| 139 | int |
| 140 | nouveau_engctx_init(struct nouveau_engctx *engctx) |
| 141 | { |
| 142 | struct nouveau_object *object = nv_object(engctx); |
| 143 | struct nouveau_subdev *subdev = nv_subdev(object->engine); |
| 144 | struct nouveau_object *parent; |
| 145 | struct nouveau_subdev *pardev; |
| 146 | int ret; |
| 147 | |
| 148 | ret = nouveau_gpuobj_init(&engctx->base); |
| 149 | if (ret) |
| 150 | return ret; |
| 151 | |
| 152 | parent = nv_pclass(object->parent, NV_PARENT_CLASS); |
| 153 | pardev = nv_subdev(parent->engine); |
| 154 | if (nv_parent(parent)->context_attach) { |
| 155 | mutex_lock(&pardev->mutex); |
| 156 | ret = nv_parent(parent)->context_attach(parent, object); |
| 157 | mutex_unlock(&pardev->mutex); |
| 158 | } |
| 159 | |
| 160 | if (ret) { |
| 161 | nv_error(parent, "failed to attach %s context, %d\n" , |
| 162 | subdev->name, ret); |
| 163 | return ret; |
| 164 | } |
| 165 | |
| 166 | nv_debug(parent, "attached %s context\n" , subdev->name); |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | int |
| 171 | nouveau_engctx_fini(struct nouveau_engctx *engctx, bool suspend) |
| 172 | { |
| 173 | struct nouveau_object *object = nv_object(engctx); |
| 174 | struct nouveau_subdev *subdev = nv_subdev(object->engine); |
| 175 | struct nouveau_object *parent; |
| 176 | struct nouveau_subdev *pardev; |
| 177 | int ret = 0; |
| 178 | |
| 179 | parent = nv_pclass(object->parent, NV_PARENT_CLASS); |
| 180 | pardev = nv_subdev(parent->engine); |
| 181 | if (nv_parent(parent)->context_detach) { |
| 182 | mutex_lock(&pardev->mutex); |
| 183 | ret = nv_parent(parent)->context_detach(parent, suspend, object); |
| 184 | mutex_unlock(&pardev->mutex); |
| 185 | } |
| 186 | |
| 187 | if (ret) { |
| 188 | nv_error(parent, "failed to detach %s context, %d\n" , |
| 189 | subdev->name, ret); |
| 190 | return ret; |
| 191 | } |
| 192 | |
| 193 | nv_debug(parent, "detached %s context\n" , subdev->name); |
| 194 | return nouveau_gpuobj_fini(&engctx->base, suspend); |
| 195 | } |
| 196 | |
| 197 | int |
| 198 | _nouveau_engctx_ctor(struct nouveau_object *parent, |
| 199 | struct nouveau_object *engine, |
| 200 | struct nouveau_oclass *oclass, void *data, u32 size, |
| 201 | struct nouveau_object **pobject) |
| 202 | { |
| 203 | struct nouveau_engctx *engctx; |
| 204 | int ret; |
| 205 | |
| 206 | ret = nouveau_engctx_create(parent, engine, oclass, NULL, 256, 256, |
| 207 | NVOBJ_FLAG_ZERO_ALLOC, &engctx); |
| 208 | *pobject = nv_object(engctx); |
| 209 | return ret; |
| 210 | } |
| 211 | |
| 212 | void |
| 213 | _nouveau_engctx_dtor(struct nouveau_object *object) |
| 214 | { |
| 215 | nouveau_engctx_destroy(nv_engctx(object)); |
| 216 | } |
| 217 | |
| 218 | int |
| 219 | _nouveau_engctx_init(struct nouveau_object *object) |
| 220 | { |
| 221 | return nouveau_engctx_init(nv_engctx(object)); |
| 222 | } |
| 223 | |
| 224 | |
| 225 | int |
| 226 | _nouveau_engctx_fini(struct nouveau_object *object, bool suspend) |
| 227 | { |
| 228 | return nouveau_engctx_fini(nv_engctx(object), suspend); |
| 229 | } |
| 230 | |
| 231 | struct nouveau_object * |
| 232 | nouveau_engctx_get(struct nouveau_engine *engine, u64 addr) |
| 233 | { |
| 234 | struct nouveau_engctx *engctx; |
| 235 | unsigned long flags; |
| 236 | |
| 237 | spin_lock_irqsave(&engine->lock, flags); |
| 238 | list_for_each_entry(engctx, &engine->contexts, head) { |
| 239 | if (engctx->addr == addr) { |
| 240 | engctx->save = flags; |
| 241 | return nv_object(engctx); |
| 242 | } |
| 243 | } |
| 244 | spin_unlock_irqrestore(&engine->lock, flags); |
| 245 | return NULL; |
| 246 | } |
| 247 | |
| 248 | void |
| 249 | nouveau_engctx_put(struct nouveau_object *object) |
| 250 | { |
| 251 | if (object) { |
| 252 | struct nouveau_engine *engine = nv_engine(object->engine); |
| 253 | struct nouveau_engctx *engctx = nv_engctx(object); |
| 254 | spin_unlock_irqrestore(&engine->lock, engctx->save); |
| 255 | } |
| 256 | } |
| 257 | |