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 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         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(&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(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                 goto out_notify;
 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 out_notify:
 130         virtio_gpu_notify(vgdev);
 131         return 0;
 132 }
 133
 134 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
 135                                  struct drm_file *file)
 136 {
 137         struct virtio_gpu_device *vgdev = obj->dev->dev_private;
 138         struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
 139         struct virtio_gpu_object_array *objs;
 140
 141         if (!vgdev->has_virgl_3d)
 142                 return;
 143
 144         objs = virtio_gpu_array_alloc(1);
 145         if (!objs)
 146                 return;
 147         virtio_gpu_array_add_obj(objs, obj);
 148
 149         virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
 150                                                objs);
 151         virtio_gpu_notify(vgdev);
 152 }
 153
 154 struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
 155 {
 156         struct virtio_gpu_object_array *objs;
 157         size_t size = sizeof(*objs) + sizeof(objs->objs[0]) * nents;
 158
 159         objs = kmalloc(size, GFP_KERNEL);
 160         if (!objs)
 161                 return NULL;
 162
 163         objs->nents = 0;
 164         objs->total = nents;
 165         return objs;
 166 }
 167
 168 static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)
 169 {
 170         kfree(objs);
 171 }
 172
 173 struct virtio_gpu_object_array*
 174 virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents)
 175 {
 176         struct virtio_gpu_object_array *objs;
 177         u32 i;
 178
 179         objs = virtio_gpu_array_alloc(nents);
 180         if (!objs)
 181                 return NULL;
 182
 183         for (i = 0; i < nents; i++) {
 184                 objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]);
 185                 if (!objs->objs[i]) {
 186                         objs->nents = i;
 187                         virtio_gpu_array_put_free(objs);
 188                         return NULL;
 189                 }
 190         }
 191         objs->nents = i;
 192         return objs;
 193 }
 194
 195 void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
 196                               struct drm_gem_object *obj)
 197 {
 198         if (WARN_ON_ONCE(objs->nents == objs->total))
 199                 return;
 200
 201         drm_gem_object_get(obj);
 202         objs->objs[objs->nents] = obj;
 203         objs->nents++;
 204 }
 205
 206 int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)
 207 {
 208         int ret;
 209
 210         if (objs->nents == 1) {
 211                 ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);
 212         } else {
 213                 ret = drm_gem_lock_reservations(objs->objs, objs->nents,
 214                                                 &objs->ticket);
 215         }
 216         return ret;
 217 }
 218
 219 void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)
 220 {
 221         if (objs->nents == 1) {
 222                 dma_resv_unlock(objs->objs[0]->resv);
 223         } else {
 224                 drm_gem_unlock_reservations(objs->objs, objs->nents,
 225                                             &objs->ticket);
 226         }
 227 }
 228
 229 void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
 230                                 struct dma_fence *fence)
 231 {
 232         int i;
 233
 234         for (i = 0; i < objs->nents; i++)
 235                 dma_resv_add_excl_fence(objs->objs[i]->resv, fence);
 236 }
 237
 238 void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)
 239 {
 240         u32 i;
 241
 242         for (i = 0; i < objs->nents; i++)
 243                 drm_gem_object_put(objs->objs[i]);
 244         virtio_gpu_array_free(objs);
 245 }
 246
 247 void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
 248                                        struct virtio_gpu_object_array *objs)
 249 {
 250         spin_lock(&vgdev->obj_free_lock);
 251         list_add_tail(&objs->next, &vgdev->obj_free_list);
 252         spin_unlock(&vgdev->obj_free_lock);
 253         schedule_work(&vgdev->obj_free_work);
 254 }
 255
 256 void virtio_gpu_array_put_free_work(struct work_struct *work)
 257 {
 258         struct virtio_gpu_device *vgdev =
 259                 container_of(work, struct virtio_gpu_device, obj_free_work);
 260         struct virtio_gpu_object_array *objs;
 261
 262         spin_lock(&vgdev->obj_free_lock);
 263         while (!list_empty(&vgdev->obj_free_list)) {
 264                 objs = list_first_entry(&vgdev->obj_free_list,
 265                                         struct virtio_gpu_object_array, next);
 266                 list_del(&objs->next);
 267                 spin_unlock(&vgdev->obj_free_lock);
 268                 virtio_gpu_array_put_free(objs);
 269                 spin_lock(&vgdev->obj_free_lock);
 270         }
 271         spin_unlock(&vgdev->obj_free_lock);
 272 }