1 /*
2 * Copyright © 2016 Bas Nieuwenhuizen
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
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24 #ifndef TU_DESCRIPTOR_SET_H
25 #define TU_DESCRIPTOR_SET_H
26
27 #include <vulkan/vulkan.h>
28
29 /* The hardware supports 5 descriptor sets, but we reserve 1 for dynamic
30 * descriptors and input attachments.
31 */
32 #define MAX_SETS 4
33
34 struct tu_descriptor_set_binding_layout
35 {
36 VkDescriptorType type;
37
38 /* Number of array elements in this binding */
39 uint32_t array_size;
40
41 /* The size in bytes of each Vulkan descriptor. */
42 uint32_t size;
43
44 uint32_t offset;
45
46 /* Byte offset in the array of dynamic descriptors (offsetted by
47 * tu_pipeline_layout::set::dynamic_offset_start).
48 */
49 uint32_t dynamic_offset_offset;
50
51 /* Offset in the tu_descriptor_set_layout of the immutable samplers, or 0
52 * if there are no immutable samplers. */
53 uint32_t immutable_samplers_offset;
54
55 /* Offset in the tu_descriptor_set_layout of the ycbcr samplers, or 0
56 * if there are no immutable samplers. */
57 uint32_t ycbcr_samplers_offset;
58
59 /* Shader stages that use this binding */
60 uint32_t shader_stages;
61 };
62
63 struct tu_descriptor_set_layout
64 {
65 struct vk_object_base base;
66
67 /* Descriptor set layouts can be destroyed at almost any time */
68 uint32_t ref_cnt;
69
70 /* The create flags for this descriptor set layout */
71 VkDescriptorSetLayoutCreateFlags flags;
72
73 /* Number of bindings in this descriptor set */
74 uint32_t binding_count;
75
76 /* Total size of the descriptor set with room for all array entries */
77 uint32_t size;
78
79 /* Shader stages affected by this descriptor set */
80 uint16_t shader_stages;
81
82 /* Size of dynamic offset descriptors used by this descriptor set */
83 uint16_t dynamic_offset_size;
84
85 bool has_immutable_samplers;
86 bool has_variable_descriptors;
87
88 /* Bindings in this descriptor set */
89 struct tu_descriptor_set_binding_layout binding[0];
90 };
91
92 struct tu_device;
93
94 void tu_descriptor_set_layout_destroy(struct tu_device *device,
95 struct tu_descriptor_set_layout *layout);
96
97 static inline void
tu_descriptor_set_layout_ref(struct tu_descriptor_set_layout * layout)98 tu_descriptor_set_layout_ref(struct tu_descriptor_set_layout *layout)
99 {
100 assert(layout && layout->ref_cnt >= 1);
101 p_atomic_inc(&layout->ref_cnt);
102 }
103
104 static inline void
tu_descriptor_set_layout_unref(struct tu_device * device,struct tu_descriptor_set_layout * layout)105 tu_descriptor_set_layout_unref(struct tu_device *device,
106 struct tu_descriptor_set_layout *layout)
107 {
108 assert(layout && layout->ref_cnt >= 1);
109 if (p_atomic_dec_zero(&layout->ref_cnt))
110 tu_descriptor_set_layout_destroy(device, layout);
111 }
112
113 struct tu_pipeline_layout
114 {
115 struct vk_object_base base;
116
117 struct
118 {
119 struct tu_descriptor_set_layout *layout;
120 uint32_t size;
121 uint32_t dynamic_offset_start;
122 } set[MAX_SETS];
123
124 uint32_t num_sets;
125 uint32_t push_constant_size;
126 uint32_t dynamic_offset_size;
127 };
128
129 static inline const struct tu_sampler *
tu_immutable_samplers(const struct tu_descriptor_set_layout * set,const struct tu_descriptor_set_binding_layout * binding)130 tu_immutable_samplers(const struct tu_descriptor_set_layout *set,
131 const struct tu_descriptor_set_binding_layout *binding)
132 {
133 return (void *) ((const char *) set + binding->immutable_samplers_offset);
134 }
135
136 static inline const struct tu_sampler_ycbcr_conversion *
tu_immutable_ycbcr_samplers(const struct tu_descriptor_set_layout * set,const struct tu_descriptor_set_binding_layout * binding)137 tu_immutable_ycbcr_samplers(const struct tu_descriptor_set_layout *set,
138 const struct tu_descriptor_set_binding_layout *binding)
139 {
140 if (!binding->ycbcr_samplers_offset)
141 return NULL;
142
143 return (void *) ((const char *) set + binding->ycbcr_samplers_offset);
144 }
145
146 #endif /* TU_DESCRIPTOR_SET_H */
147