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