drivers/gpu/drm/vmwgfx/vmwgfx_system_manager.c

   1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
   2 /*
   3  * Copyright 2021 VMware, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person
   6  * obtaining a copy of this software and associated documentation
   7  * files (the "Software"), to deal in the Software without
   8  * restriction, including without limitation the rights to use, copy,
   9  * modify, merge, publish, distribute, sublicense, and/or sell copies
  10  * of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be
  14  * included in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  20  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  21  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  */
  26
  27 #include "vmwgfx_drv.h"
  28
  29 #include <drm/ttm/ttm_device.h>
  30 #include <drm/ttm/ttm_placement.h>
  31 #include <drm/ttm/ttm_resource.h>
  32 #include <linux/slab.h>
  33
  34
  35 static int vmw_sys_man_alloc(struct ttm_resource_manager *man,
  36                              struct ttm_buffer_object *bo,
  37                              const struct ttm_place *place,
  38                              struct ttm_resource **res)
  39 {
  40         *res = kzalloc(sizeof(**res), GFP_KERNEL);
  41         if (!*res)
  42                 return -ENOMEM;
  43
  44         ttm_resource_init(bo, place, *res);
  45         return 0;
  46 }
  47
  48 static void vmw_sys_man_free(struct ttm_resource_manager *man,
  49                              struct ttm_resource *res)
  50 {
  51         ttm_resource_fini(man, res);
  52         kfree(res);
  53 }
  54
  55 static const struct ttm_resource_manager_func vmw_sys_manager_func = {
  56         .alloc = vmw_sys_man_alloc,
  57         .free = vmw_sys_man_free,
  58 };
  59
  60 int vmw_sys_man_init(struct vmw_private *dev_priv)
  61 {
  62         struct ttm_device *bdev = &dev_priv->bdev;
  63         struct ttm_resource_manager *man =
  64                         kzalloc(sizeof(*man), GFP_KERNEL);
  65
  66         if (!man)
  67                 return -ENOMEM;
  68
  69         man->use_tt = true;
  70         man->func = &vmw_sys_manager_func;
  71
  72         ttm_resource_manager_init(man, bdev, 0);
  73         ttm_set_driver_manager(bdev, VMW_PL_SYSTEM, man);
  74         ttm_resource_manager_set_used(man, true);
  75         return 0;
  76 }
  77
  78 void vmw_sys_man_fini(struct vmw_private *dev_priv)
  79 {
  80         struct ttm_resource_manager *man = ttm_manager_type(&dev_priv->bdev,
  81                                                             VMW_PL_SYSTEM);
  82
  83         ttm_resource_manager_evict_all(&dev_priv->bdev, man);
  84
  85         ttm_resource_manager_set_used(man, false);
  86         ttm_resource_manager_cleanup(man);
  87
  88         ttm_set_driver_manager(&dev_priv->bdev, VMW_PL_SYSTEM, NULL);
  89         kfree(man);
  90 }