1 /* 2 * Copyright (C) 2015 Red Hat, Inc. 3 * All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the 14 * next paragraph) shall be included in all copies or substantial 15 * portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 */ 25 26 #include <drm/drm_file.h> 27 #include <drm/drm_fourcc.h> 28 29 #include "virtgpu_drv.h" 30 31 static int virtio_gpu_gem_create(struct drm_file *file, 32 struct drm_device *dev, 33 struct virtio_gpu_object_params *params, 34 struct drm_gem_object **obj_p, 35 uint32_t *handle_p) 36 { 37 struct virtio_gpu_device *vgdev = dev->dev_private; 38 struct virtio_gpu_object *obj; 39 int ret; 40 u32 handle; 41 42 ret = virtio_gpu_object_create(vgdev, params, &obj, NULL); 43 if (ret < 0) 44 return ret; 45 46 ret = drm_gem_handle_create(file, &obj->base.base, &handle); 47 if (ret) { 48 drm_gem_object_release(&obj->base.base); 49 return ret; 50 } 51 52 *obj_p = &obj->base.base; 53 54 /* drop reference from allocate - handle holds it now */ 55 drm_gem_object_put(&obj->base.base); 56 57 *handle_p = handle; 58 return 0; 59 } 60 61 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv, 62 struct drm_device *dev, 63 struct drm_mode_create_dumb *args) 64 { 65 struct drm_gem_object *gobj; 66 struct virtio_gpu_object_params params = { 0 }; 67 struct virtio_gpu_device *vgdev = dev->dev_private; 68 int ret; 69 uint32_t pitch; 70 71 if (args->bpp != 32) 72 return -EINVAL; 73 74 pitch = args->width * 4; 75 args->size = pitch * args->height; 76 args->size = ALIGN(args->size, PAGE_SIZE); 77 78 params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888); 79 params.width = args->width; 80 params.height = args->height; 81 params.size = args->size; 82 params.dumb = true; 83 84 if (vgdev->has_resource_blob && !vgdev->has_virgl_3d) { 85 params.blob_mem = VIRTGPU_BLOB_MEM_GUEST; 86 params.blob_flags = VIRTGPU_BLOB_FLAG_USE_SHAREABLE; 87 params.blob = true; 88 } 89 90 ret = virtio_gpu_gem_create(file_priv, dev, ¶ms, &gobj, 91 &args->handle); 92 if (ret) 93 goto fail; 94 95 args->pitch = pitch; 96 return ret; 97 98 fail: 99 return ret; 100 } 101 102 int virtio_gpu_gem_object_open(struct drm_gem_object *obj, 103 struct drm_file *file) 104 { 105 struct virtio_gpu_device *vgdev = obj->dev->dev_private; 106 struct virtio_gpu_fpriv *vfpriv = file->driver_priv; 107 struct virtio_gpu_object_array *objs; 108 109 if (!vgdev->has_virgl_3d) 110 goto out_notify; 111 112 /* the context might still be missing when the first ioctl is 113 * DRM_IOCTL_MODE_CREATE_DUMB or DRM_IOCTL_PRIME_FD_TO_HANDLE 114 */ 115 if (!vgdev->has_context_init) 116 virtio_gpu_create_context(obj->dev, file); 117 118 if (vfpriv->context_created) { 119 objs = virtio_gpu_array_alloc(1); 120 if (!objs) 121 return -ENOMEM; 122 virtio_gpu_array_add_obj(objs, obj); 123 124 virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id, objs); 125 } 126 127 out_notify: 128 virtio_gpu_notify(vgdev); 129 return 0; 130 } 131 132 void virtio_gpu_gem_object_close(struct drm_gem_object *obj, 133 struct drm_file *file) 134 { 135 struct virtio_gpu_device *vgdev = obj->dev->dev_private; 136 struct virtio_gpu_fpriv *vfpriv = file->driver_priv; 137 struct virtio_gpu_object_array *objs; 138 139 if (!vgdev->has_virgl_3d) 140 return; 141 142 objs = virtio_gpu_array_alloc(1); 143 if (!objs) 144 return; 145 virtio_gpu_array_add_obj(objs, obj); 146 147 virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id, 148 objs); 149 virtio_gpu_notify(vgdev); 150 } 151 152 /* For drm panic */ 153 struct virtio_gpu_object_array *virtio_gpu_panic_array_alloc(void) 154 { 155 struct virtio_gpu_object_array *objs; 156 157 objs = kmalloc(sizeof(struct virtio_gpu_object_array), GFP_ATOMIC); 158 if (!objs) 159 return NULL; 160 161 objs->nents = 0; 162 objs->total = 1; 163 return objs; 164 } 165 166 struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents) 167 { 168 struct virtio_gpu_object_array *objs; 169 170 objs = kmalloc(struct_size(objs, objs, nents), GFP_KERNEL); 171 if (!objs) 172 return NULL; 173 174 objs->nents = 0; 175 objs->total = nents; 176 return objs; 177 } 178 179 static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs) 180 { 181 kfree(objs); 182 } 183 184 struct virtio_gpu_object_array* 185 virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents) 186 { 187 struct virtio_gpu_object_array *objs; 188 u32 i; 189 190 objs = virtio_gpu_array_alloc(nents); 191 if (!objs) 192 return NULL; 193 194 for (i = 0; i < nents; i++) { 195 objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]); 196 if (!objs->objs[i]) { 197 objs->nents = i; 198 virtio_gpu_array_put_free(objs); 199 return NULL; 200 } 201 } 202 objs->nents = i; 203 return objs; 204 } 205 206 void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs, 207 struct drm_gem_object *obj) 208 { 209 if (WARN_ON_ONCE(objs->nents == objs->total)) 210 return; 211 212 drm_gem_object_get(obj); 213 objs->objs[objs->nents] = obj; 214 objs->nents++; 215 } 216 217 int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs) 218 { 219 unsigned int i; 220 int ret; 221 222 if (objs->nents == 1) { 223 ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL); 224 } else { 225 ret = drm_gem_lock_reservations(objs->objs, objs->nents, 226 &objs->ticket); 227 } 228 if (ret) 229 return ret; 230 231 for (i = 0; i < objs->nents; ++i) { 232 ret = dma_resv_reserve_fences(objs->objs[i]->resv, 1); 233 if (ret) { 234 virtio_gpu_array_unlock_resv(objs); 235 return ret; 236 } 237 } 238 return ret; 239 } 240 241 void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs) 242 { 243 if (objs->nents == 1) { 244 dma_resv_unlock(objs->objs[0]->resv); 245 } else { 246 drm_gem_unlock_reservations(objs->objs, objs->nents, 247 &objs->ticket); 248 } 249 } 250 251 void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs, 252 struct dma_fence *fence) 253 { 254 int i; 255 256 for (i = 0; i < objs->nents; i++) 257 dma_resv_add_fence(objs->objs[i]->resv, fence, 258 DMA_RESV_USAGE_WRITE); 259 } 260 261 void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs) 262 { 263 u32 i; 264 265 if (!objs) 266 return; 267 268 for (i = 0; i < objs->nents; i++) 269 drm_gem_object_put(objs->objs[i]); 270 virtio_gpu_array_free(objs); 271 } 272 273 void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev, 274 struct virtio_gpu_object_array *objs) 275 { 276 spin_lock(&vgdev->obj_free_lock); 277 list_add_tail(&objs->next, &vgdev->obj_free_list); 278 spin_unlock(&vgdev->obj_free_lock); 279 schedule_work(&vgdev->obj_free_work); 280 } 281 282 void virtio_gpu_array_put_free_work(struct work_struct *work) 283 { 284 struct virtio_gpu_device *vgdev = 285 container_of(work, struct virtio_gpu_device, obj_free_work); 286 struct virtio_gpu_object_array *objs; 287 288 spin_lock(&vgdev->obj_free_lock); 289 while (!list_empty(&vgdev->obj_free_list)) { 290 objs = list_first_entry(&vgdev->obj_free_list, 291 struct virtio_gpu_object_array, next); 292 list_del(&objs->next); 293 spin_unlock(&vgdev->obj_free_lock); 294 virtio_gpu_array_put_free(objs); 295 spin_lock(&vgdev->obj_free_lock); 296 } 297 spin_unlock(&vgdev->obj_free_lock); 298 } 299