drivers/gpu/drm/virtio/virtgpu_gem.c

   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 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         if (vgdev->has_virgl_3d)
  43                 virtio_gpu_create_context(dev, file);
  44
  45         ret = virtio_gpu_object_create(vgdev, params, &obj, NULL);
  46         if (ret < 0)
  47                 return ret;
  48
  49         ret = drm_gem_handle_create(file, &obj->base.base, &handle);
  50         if (ret) {
  51                 drm_gem_object_release(&obj->base.base);
  52                 return ret;
  53         }
  54
  55         *obj_p = &obj->base.base;
  56
  57         /* drop reference from allocate - handle holds it now */
  58         drm_gem_object_put_unlocked(&obj->base.base);
  59
  60         *handle_p = handle;
  61         return 0;
  62 }
  63
  64 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
  65                                 struct drm_device *dev,
  66                                 struct drm_mode_create_dumb *args)
  67 {
  68         struct drm_gem_object *gobj;
  69         struct virtio_gpu_object_params params = { 0 };
  70         int ret;
  71         uint32_t pitch;
  72
  73         if (args->bpp != 32)
  74                 return -EINVAL;
  75
  76         pitch = args->width * 4;
  77         args->size = pitch * args->height;
  78         args->size = ALIGN(args->size, PAGE_SIZE);
  79
  80         params.format = virtio_gpu_translate_format(DRM_FORMAT_HOST_XRGB8888);
  81         params.width = args->width;
  82         params.height = args->height;
  83         params.size = args->size;
  84         params.dumb = true;
  85         ret = virtio_gpu_gem_create(file_priv, dev, &params, &gobj,
  86                                     &args->handle);
  87         if (ret)
  88                 goto fail;
  89
  90         args->pitch = pitch;
  91         return ret;
  92
  93 fail:
  94         return ret;
  95 }
  96
  97 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
  98                               struct drm_device *dev,
  99                               uint32_t handle, uint64_t *offset_p)
 100 {
 101         struct drm_gem_object *gobj;
 102
 103         BUG_ON(!offset_p);
 104         gobj = drm_gem_object_lookup(file_priv, handle);
 105         if (gobj == NULL)
 106                 return -ENOENT;
 107         *offset_p = drm_vma_node_offset_addr(&gobj->vma_node);
 108         drm_gem_object_put_unlocked(gobj);
 109         return 0;
 110 }
 111
 112 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 113                                struct drm_file *file)
 114 {
 115         struct virtio_gpu_device *vgdev = obj->dev->dev_private;
 116         struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
 117         struct virtio_gpu_object_array *objs;
 118
 119         if (!vgdev->has_virgl_3d)
 120                 return 0;
 121
 122         objs = virtio_gpu_array_alloc(1);
 123         if (!objs)
 124                 return -ENOMEM;
 125         virtio_gpu_array_add_obj(objs, obj);
 126
 127         virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
 128                                                objs);
 129         virtio_gpu_notify(vgdev);
 130         return 0;
 131 }
 132
 133 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
 134                                  struct drm_file *file)
 135 {
 136         struct virtio_gpu_device *vgdev = obj->dev->dev_private;
 137         struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
 138         struct virtio_gpu_object_array *objs;
 139
 140         if (!vgdev->has_virgl_3d)
 141                 return;
 142
 143         objs = virtio_gpu_array_alloc(1);
 144         if (!objs)
 145                 return;
 146         virtio_gpu_array_add_obj(objs, obj);
 147
 148         virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
 149                                                objs);
 150         virtio_gpu_notify(vgdev);
 151 }
 152
 153 struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
 154 {
 155         struct virtio_gpu_object_array *objs;
 156         size_t size = sizeof(*objs) + sizeof(objs->objs[0]) * nents;
 157
 158         objs = kmalloc(size, GFP_KERNEL);
 159         if (!objs)
 160                 return NULL;
 161
 162         objs->nents = 0;
 163         objs->total = nents;
 164         return objs;
 165 }
 166
 167 static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)
 168 {
 169         kfree(objs);
 170 }
 171
 172 struct virtio_gpu_object_array*
 173 virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents)
 174 {
 175         struct virtio_gpu_object_array *objs;
 176         u32 i;
 177
 178         objs = virtio_gpu_array_alloc(nents);
 179         if (!objs)
 180                 return NULL;
 181
 182         for (i = 0; i < nents; i++) {
 183                 objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]);
 184                 if (!objs->objs[i]) {
 185                         objs->nents = i;
 186                         virtio_gpu_array_put_free(objs);
 187                         return NULL;
 188                 }
 189         }
 190         objs->nents = i;
 191         return objs;
 192 }
 193
 194 void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
 195                               struct drm_gem_object *obj)
 196 {
 197         if (WARN_ON_ONCE(objs->nents == objs->total))
 198                 return;
 199
 200         drm_gem_object_get(obj);
 201         objs->objs[objs->nents] = obj;
 202         objs->nents++;
 203 }
 204
 205 int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)
 206 {
 207         int ret;
 208
 209         if (objs->nents == 1) {
 210                 ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);
 211         } else {
 212                 ret = drm_gem_lock_reservations(objs->objs, objs->nents,
 213                                                 &objs->ticket);
 214         }
 215         return ret;
 216 }
 217
 218 void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)
 219 {
 220         if (objs->nents == 1) {
 221                 dma_resv_unlock(objs->objs[0]->resv);
 222         } else {
 223                 drm_gem_unlock_reservations(objs->objs, objs->nents,
 224                                             &objs->ticket);
 225         }
 226 }
 227
 228 void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
 229                                 struct dma_fence *fence)
 230 {
 231         int i;
 232
 233         for (i = 0; i < objs->nents; i++)
 234                 dma_resv_add_excl_fence(objs->objs[i]->resv, fence);
 235 }
 236
 237 void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)
 238 {
 239         u32 i;
 240
 241         for (i = 0; i < objs->nents; i++)
 242                 drm_gem_object_put_unlocked(objs->objs[i]);
 243         virtio_gpu_array_free(objs);
 244 }
 245
 246 void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
 247                                        struct virtio_gpu_object_array *objs)
 248 {
 249         spin_lock(&vgdev->obj_free_lock);
 250         list_add_tail(&objs->next, &vgdev->obj_free_list);
 251         spin_unlock(&vgdev->obj_free_lock);
 252         schedule_work(&vgdev->obj_free_work);
 253 }
 254
 255 void virtio_gpu_array_put_free_work(struct work_struct *work)
 256 {
 257         struct virtio_gpu_device *vgdev =
 258                 container_of(work, struct virtio_gpu_device, obj_free_work);
 259         struct virtio_gpu_object_array *objs;
 260
 261         spin_lock(&vgdev->obj_free_lock);
 262         while (!list_empty(&vgdev->obj_free_list)) {
 263                 objs = list_first_entry(&vgdev->obj_free_list,
 264                                         struct virtio_gpu_object_array, next);
 265                 list_del(&objs->next);
 266                 spin_unlock(&vgdev->obj_free_lock);
 267                 virtio_gpu_array_put_free(objs);
 268                 spin_lock(&vgdev->obj_free_lock);
 269         }
 270         spin_unlock(&vgdev->obj_free_lock);
 271 }