drivers/gpu/drm/i915/i915_gem_fence_reg.h

   1 /*
   2  * Copyright © 2016 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #ifndef __I915_FENCE_REG_H__
  26 #define __I915_FENCE_REG_H__
  27
  28 #include <linux/list.h>
  29 #include <linux/types.h>
  30
  31 struct drm_i915_gem_object;
  32 struct i915_ggtt;
  33 struct i915_vma;
  34 struct intel_gt;
  35 struct sg_table;
  36
  37 #define I965_FENCE_PAGE 4096UL
  38
  39 struct i915_fence_reg {
  40         struct list_head link;
  41         struct i915_ggtt *ggtt;
  42         struct i915_vma *vma;
  43         atomic_t pin_count;
  44         int id;
  45         /**
  46          * Whether the tiling parameters for the currently
  47          * associated fence register have changed. Note that
  48          * for the purposes of tracking tiling changes we also
  49          * treat the unfenced register, the register slot that
  50          * the object occupies whilst it executes a fenced
  51          * command (such as BLT on gen2/3), as a "fence".
  52          */
  53         bool dirty;
  54 };
  55
  56 /* i915_gem_fence_reg.c */
  57 struct i915_fence_reg *i915_reserve_fence(struct i915_ggtt *ggtt);
  58 void i915_unreserve_fence(struct i915_fence_reg *fence);
  59
  60 void i915_gem_restore_fences(struct i915_ggtt *ggtt);
  61
  62 void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj,
  63                                        struct sg_table *pages);
  64 void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj,
  65                                          struct sg_table *pages);
  66
  67 void i915_ggtt_init_fences(struct i915_ggtt *ggtt);
  68
  69 void intel_gt_init_swizzling(struct intel_gt *gt);
  70
  71 #endif