drivers/gpu/drm/vmwgfx/vmwgfx_bo.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
   2 /**************************************************************************
   3  *
   4  * Copyright 2023 VMware, Inc., Palo Alto, CA., USA
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  24  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #ifndef VMWGFX_BO_H
  29 #define VMWGFX_BO_H
  30
  31 #include "device_include/svga_reg.h"
  32
  33 #include <drm/ttm/ttm_bo.h>
  34 #include <drm/ttm/ttm_placement.h>
  35
  36 #include <linux/rbtree_types.h>
  37 #include <linux/types.h>
  38
  39 struct vmw_bo_dirty;
  40 struct vmw_fence_obj;
  41 struct vmw_private;
  42 struct vmw_resource;
  43
  44 enum vmw_bo_domain {
  45         VMW_BO_DOMAIN_SYS           = BIT(0),
  46         VMW_BO_DOMAIN_WAITABLE_SYS  = BIT(1),
  47         VMW_BO_DOMAIN_VRAM          = BIT(2),
  48         VMW_BO_DOMAIN_GMR           = BIT(3),
  49         VMW_BO_DOMAIN_MOB           = BIT(4),
  50 };
  51
  52 struct vmw_bo_params {
  53         u32 domain;
  54         u32 busy_domain;
  55         enum ttm_bo_type bo_type;
  56         size_t size;
  57         bool pin;
  58 };
  59
  60 /**
  61  * struct vmw_bo - TTM buffer object with vmwgfx additions
  62  * @tbo: The TTM buffer object
  63  * @placement: The preferred placement for this buffer object
  64  * @places: The chosen places for the preferred placement.
  65  * @busy_places: Chosen busy places for the preferred placement
  66  * @map: Kmap object for semi-persistent mappings
  67  * @res_tree: RB tree of resources using this buffer object as a backing MOB
  68  * @res_prios: Eviction priority counts for attached resources
  69  * @cpu_writers: Number of synccpu write grabs. Protected by reservation when
  70  * increased. May be decreased without reservation.
  71  * @dx_query_ctx: DX context if this buffer object is used as a DX query MOB
  72  * @dirty: structure for user-space dirty-tracking
  73  */
  74 struct vmw_bo {
  75         struct ttm_buffer_object tbo;
  76
  77         struct ttm_placement placement;
  78         struct ttm_place places[5];
  79         struct ttm_place busy_places[5];
  80
  81         /* Protected by reservation */
  82         struct ttm_bo_kmap_obj map;
  83
  84         struct rb_root res_tree;
  85         u32 res_prios[TTM_MAX_BO_PRIORITY];
  86
  87         atomic_t cpu_writers;
  88         /* Not ref-counted.  Protected by binding_mutex */
  89         struct vmw_resource *dx_query_ctx;
  90         struct vmw_bo_dirty *dirty;
  91 };
  92
  93 void vmw_bo_placement_set(struct vmw_bo *bo, u32 domain, u32 busy_domain);
  94 void vmw_bo_placement_set_default_accelerated(struct vmw_bo *bo);
  95
  96 int vmw_bo_create(struct vmw_private *dev_priv,
  97                   struct vmw_bo_params *params,
  98                   struct vmw_bo **p_bo);
  99
 100 int vmw_bo_unref_ioctl(struct drm_device *dev, void *data,
 101                        struct drm_file *file_priv);
 102
 103 int vmw_bo_pin_in_vram(struct vmw_private *dev_priv,
 104                        struct vmw_bo *buf,
 105                        bool interruptible);
 106 int vmw_bo_pin_in_vram_or_gmr(struct vmw_private *dev_priv,
 107                               struct vmw_bo *buf,
 108                               bool interruptible);
 109 int vmw_bo_pin_in_start_of_vram(struct vmw_private *vmw_priv,
 110                                 struct vmw_bo *bo,
 111                                 bool interruptible);
 112 void vmw_bo_pin_reserved(struct vmw_bo *bo, bool pin);
 113 int vmw_bo_unpin(struct vmw_private *vmw_priv,
 114                  struct vmw_bo *bo,
 115                  bool interruptible);
 116
 117 void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *buf,
 118                           SVGAGuestPtr *ptr);
 119 int vmw_user_bo_synccpu_ioctl(struct drm_device *dev, void *data,
 120                               struct drm_file *file_priv);
 121 void vmw_bo_fence_single(struct ttm_buffer_object *bo,
 122                          struct vmw_fence_obj *fence);
 123
 124 void *vmw_bo_map_and_cache(struct vmw_bo *vbo);
 125 void vmw_bo_unmap(struct vmw_bo *vbo);
 126
 127 void vmw_bo_move_notify(struct ttm_buffer_object *bo,
 128                         struct ttm_resource *mem);
 129 void vmw_bo_swap_notify(struct ttm_buffer_object *bo);
 130
 131 int vmw_user_bo_lookup(struct drm_file *filp,
 132                        u32 handle,
 133                        struct vmw_bo **out);
 134 /**
 135  * vmw_bo_adjust_prio - Adjust the buffer object eviction priority
 136  * according to attached resources
 137  * @vbo: The struct vmw_bo
 138  */
 139 static inline void vmw_bo_prio_adjust(struct vmw_bo *vbo)
 140 {
 141         int i = ARRAY_SIZE(vbo->res_prios);
 142
 143         while (i--) {
 144                 if (vbo->res_prios[i]) {
 145                         vbo->tbo.priority = i;
 146                         return;
 147                 }
 148         }
 149
 150         vbo->tbo.priority = 3;
 151 }
 152
 153 /**
 154  * vmw_bo_prio_add - Notify a buffer object of a newly attached resource
 155  * eviction priority
 156  * @vbo: The struct vmw_bo
 157  * @prio: The resource priority
 158  *
 159  * After being notified, the code assigns the highest resource eviction priority
 160  * to the backing buffer object (mob).
 161  */
 162 static inline void vmw_bo_prio_add(struct vmw_bo *vbo, int prio)
 163 {
 164         if (vbo->res_prios[prio]++ == 0)
 165                 vmw_bo_prio_adjust(vbo);
 166 }
 167
 168 /**
 169  * vmw_bo_used_prio_del - Notify a buffer object of a resource with a certain
 170  * priority being removed
 171  * @vbo: The struct vmw_bo
 172  * @prio: The resource priority
 173  *
 174  * After being notified, the code assigns the highest resource eviction priority
 175  * to the backing buffer object (mob).
 176  */
 177 static inline void vmw_bo_prio_del(struct vmw_bo *vbo, int prio)
 178 {
 179         if (--vbo->res_prios[prio] == 0)
 180                 vmw_bo_prio_adjust(vbo);
 181 }
 182
 183 static inline void vmw_bo_unreference(struct vmw_bo **buf)
 184 {
 185         struct vmw_bo *tmp_buf = *buf;
 186
 187         *buf = NULL;
 188         if (tmp_buf)
 189                 ttm_bo_put(&tmp_buf->tbo);
 190 }
 191
 192 static inline struct vmw_bo *vmw_bo_reference(struct vmw_bo *buf)
 193 {
 194         ttm_bo_get(&buf->tbo);
 195         return buf;
 196 }
 197
 198 static inline struct vmw_bo *vmw_user_bo_ref(struct vmw_bo *vbo)
 199 {
 200         drm_gem_object_get(&vbo->tbo.base);
 201         return vbo;
 202 }
 203
 204 static inline void vmw_user_bo_unref(struct vmw_bo **buf)
 205 {
 206         struct vmw_bo *tmp_buf = *buf;
 207
 208         *buf = NULL;
 209         if (tmp_buf)
 210                 drm_gem_object_put(&tmp_buf->tbo.base);
 211 }
 212
 213 static inline struct vmw_bo *to_vmw_bo(struct drm_gem_object *gobj)
 214 {
 215         return container_of((gobj), struct vmw_bo, tbo.base);
 216 }
 217
 218 #endif // VMWGFX_BO_H