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         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, &params, &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_mode_dumb_mmap(struct drm_file *file_priv,
 103                               struct drm_device *dev,
 104                               uint32_t handle, uint64_t *offset_p)
 105 {
 106         struct drm_gem_object *gobj;
 107
 108         BUG_ON(!offset_p);
 109         gobj = drm_gem_object_lookup(file_priv, handle);
 110         if (gobj == NULL)
 111                 return -ENOENT;
 112         *offset_p = drm_vma_node_offset_addr(&gobj->vma_node);
 113         drm_gem_object_put(gobj);
 114         return 0;
 115 }
 116
 117 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 118                                struct drm_file *file)
 119 {
 120         struct virtio_gpu_device *vgdev = obj->dev->dev_private;
 121         struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
 122         struct virtio_gpu_object_array *objs;
 123
 124         if (!vgdev->has_virgl_3d)
 125                 goto out_notify;
 126
 127         /* the context might still be missing when the first ioctl is
 128          * DRM_IOCTL_MODE_CREATE_DUMB or DRM_IOCTL_PRIME_FD_TO_HANDLE
 129          */
 130         virtio_gpu_create_context(obj->dev, file);
 131
 132         objs = virtio_gpu_array_alloc(1);
 133         if (!objs)
 134                 return -ENOMEM;
 135         virtio_gpu_array_add_obj(objs, obj);
 136
 137         virtio_gpu_cmd_context_attach_resource(vgdev, vfpriv->ctx_id,
 138                                                objs);
 139 out_notify:
 140         virtio_gpu_notify(vgdev);
 141         return 0;
 142 }
 143
 144 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
 145                                  struct drm_file *file)
 146 {
 147         struct virtio_gpu_device *vgdev = obj->dev->dev_private;
 148         struct virtio_gpu_fpriv *vfpriv = file->driver_priv;
 149         struct virtio_gpu_object_array *objs;
 150
 151         if (!vgdev->has_virgl_3d)
 152                 return;
 153
 154         objs = virtio_gpu_array_alloc(1);
 155         if (!objs)
 156                 return;
 157         virtio_gpu_array_add_obj(objs, obj);
 158
 159         virtio_gpu_cmd_context_detach_resource(vgdev, vfpriv->ctx_id,
 160                                                objs);
 161         virtio_gpu_notify(vgdev);
 162 }
 163
 164 struct virtio_gpu_object_array *virtio_gpu_array_alloc(u32 nents)
 165 {
 166         struct virtio_gpu_object_array *objs;
 167
 168         objs = kmalloc(struct_size(objs, objs, nents), GFP_KERNEL);
 169         if (!objs)
 170                 return NULL;
 171
 172         objs->nents = 0;
 173         objs->total = nents;
 174         return objs;
 175 }
 176
 177 static void virtio_gpu_array_free(struct virtio_gpu_object_array *objs)
 178 {
 179         kfree(objs);
 180 }
 181
 182 struct virtio_gpu_object_array*
 183 virtio_gpu_array_from_handles(struct drm_file *drm_file, u32 *handles, u32 nents)
 184 {
 185         struct virtio_gpu_object_array *objs;
 186         u32 i;
 187
 188         objs = virtio_gpu_array_alloc(nents);
 189         if (!objs)
 190                 return NULL;
 191
 192         for (i = 0; i < nents; i++) {
 193                 objs->objs[i] = drm_gem_object_lookup(drm_file, handles[i]);
 194                 if (!objs->objs[i]) {
 195                         objs->nents = i;
 196                         virtio_gpu_array_put_free(objs);
 197                         return NULL;
 198                 }
 199         }
 200         objs->nents = i;
 201         return objs;
 202 }
 203
 204 void virtio_gpu_array_add_obj(struct virtio_gpu_object_array *objs,
 205                               struct drm_gem_object *obj)
 206 {
 207         if (WARN_ON_ONCE(objs->nents == objs->total))
 208                 return;
 209
 210         drm_gem_object_get(obj);
 211         objs->objs[objs->nents] = obj;
 212         objs->nents++;
 213 }
 214
 215 int virtio_gpu_array_lock_resv(struct virtio_gpu_object_array *objs)
 216 {
 217         unsigned int i;
 218         int ret;
 219
 220         if (objs->nents == 1) {
 221                 ret = dma_resv_lock_interruptible(objs->objs[0]->resv, NULL);
 222         } else {
 223                 ret = drm_gem_lock_reservations(objs->objs, objs->nents,
 224                                                 &objs->ticket);
 225         }
 226         if (ret)
 227                 return ret;
 228
 229         for (i = 0; i < objs->nents; ++i) {
 230                 ret = dma_resv_reserve_fences(objs->objs[i]->resv, 1);
 231                 if (ret) {
 232                         virtio_gpu_array_unlock_resv(objs);
 233                         return ret;
 234                 }
 235         }
 236         return ret;
 237 }
 238
 239 void virtio_gpu_array_unlock_resv(struct virtio_gpu_object_array *objs)
 240 {
 241         if (objs->nents == 1) {
 242                 dma_resv_unlock(objs->objs[0]->resv);
 243         } else {
 244                 drm_gem_unlock_reservations(objs->objs, objs->nents,
 245                                             &objs->ticket);
 246         }
 247 }
 248
 249 void virtio_gpu_array_add_fence(struct virtio_gpu_object_array *objs,
 250                                 struct dma_fence *fence)
 251 {
 252         int i;
 253
 254         for (i = 0; i < objs->nents; i++)
 255                 dma_resv_add_fence(objs->objs[i]->resv, fence,
 256                                    DMA_RESV_USAGE_WRITE);
 257 }
 258
 259 void virtio_gpu_array_put_free(struct virtio_gpu_object_array *objs)
 260 {
 261         u32 i;
 262
 263         if (!objs)
 264                 return;
 265
 266         for (i = 0; i < objs->nents; i++)
 267                 drm_gem_object_put(objs->objs[i]);
 268         virtio_gpu_array_free(objs);
 269 }
 270
 271 void virtio_gpu_array_put_free_delayed(struct virtio_gpu_device *vgdev,
 272                                        struct virtio_gpu_object_array *objs)
 273 {
 274         spin_lock(&vgdev->obj_free_lock);
 275         list_add_tail(&objs->next, &vgdev->obj_free_list);
 276         spin_unlock(&vgdev->obj_free_lock);
 277         schedule_work(&vgdev->obj_free_work);
 278 }
 279
 280 void virtio_gpu_array_put_free_work(struct work_struct *work)
 281 {
 282         struct virtio_gpu_device *vgdev =
 283                 container_of(work, struct virtio_gpu_device, obj_free_work);
 284         struct virtio_gpu_object_array *objs;
 285
 286         spin_lock(&vgdev->obj_free_lock);
 287         while (!list_empty(&vgdev->obj_free_list)) {
 288                 objs = list_first_entry(&vgdev->obj_free_list,
 289                                         struct virtio_gpu_object_array, next);
 290                 list_del(&objs->next);
 291                 spin_unlock(&vgdev->obj_free_lock);
 292                 virtio_gpu_array_put_free(objs);
 293                 spin_lock(&vgdev->obj_free_lock);
 294         }
 295         spin_unlock(&vgdev->obj_free_lock);
 296 }