drivers/gpu/drm/ttm/ttm_sys_manager.c

   1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
   2
   3 #include <drm/ttm/ttm_resource.h>
   4 #include <drm/ttm/ttm_device.h>
   5 #include <drm/ttm/ttm_placement.h>
   6 #include <linux/slab.h>
   7
   8 #include "ttm_module.h"
   9
  10 static int ttm_sys_man_alloc(struct ttm_resource_manager *man,
  11                              struct ttm_buffer_object *bo,
  12                              const struct ttm_place *place,
  13                              struct ttm_resource **res)
  14 {
  15         *res = kzalloc(sizeof(**res), GFP_KERNEL);
  16         if (!*res)
  17                 return -ENOMEM;
  18
  19         ttm_resource_init(bo, place, *res);
  20         return 0;
  21 }
  22
  23 static void ttm_sys_man_free(struct ttm_resource_manager *man,
  24                              struct ttm_resource *res)
  25 {
  26         ttm_resource_fini(man, res);
  27         kfree(res);
  28 }
  29
  30 static const struct ttm_resource_manager_func ttm_sys_manager_func = {
  31         .alloc = ttm_sys_man_alloc,
  32         .free = ttm_sys_man_free,
  33 };
  34
  35 void ttm_sys_man_init(struct ttm_device *bdev)
  36 {
  37         struct ttm_resource_manager *man = &bdev->sysman;
  38
  39         /*
  40          * Initialize the system memory buffer type.
  41          * Other types need to be driver / IOCTL initialized.
  42          */
  43         man->use_tt = true;
  44         man->func = &ttm_sys_manager_func;
  45
  46         ttm_resource_manager_init(man, bdev, 0);
  47         ttm_set_driver_manager(bdev, TTM_PL_SYSTEM, man);
  48         ttm_resource_manager_set_used(man, true);
  49 }