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
31struct drm_i915_gem_object;
32struct drm_i915_private;
33struct i915_ggtt;
34struct i915_vma;
35struct intel_gt;
36struct sg_table;
37
38#define I965_FENCE_PAGE 4096UL
39
40struct i915_fence_reg {
41	struct list_head link;
42	struct drm_i915_private *i915;
43	struct i915_vma *vma;
44	atomic_t pin_count;
45	int id;
46	/**
47	 * Whether the tiling parameters for the currently
48	 * associated fence register have changed. Note that
49	 * for the purposes of tracking tiling changes we also
50	 * treat the unfenced register, the register slot that
51	 * the object occupies whilst it executes a fenced
52	 * command (such as BLT on gen2/3), as a "fence".
53	 */
54	bool dirty;
55};
56
57/* i915_gem_fence_reg.c */
58struct i915_fence_reg *i915_reserve_fence(struct drm_i915_private *i915);
59void i915_unreserve_fence(struct i915_fence_reg *fence);
60
61void i915_gem_restore_fences(struct drm_i915_private *i915);
62
63void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj,
64				       struct sg_table *pages);
65void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj,
66					 struct sg_table *pages);
67
68void i915_ggtt_init_fences(struct i915_ggtt *ggtt);
69
70void intel_gt_init_swizzling(struct intel_gt *gt);
71
72#endif