src/freedreno/vulkan/tu_descriptor_set.h

   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    /* For descriptors that point to a buffer, index into the array of BO's to
  47     * be added to the cmdbuffer's used BO list.
  48     */
  49    uint32_t buffer_offset;
  50
  51    /* Index into the pDynamicOffsets array for dynamic descriptors, as well as
  52     * the array of dynamic descriptors (offsetted by
  53     * tu_pipeline_layout::set::dynamic_offset_start).
  54     */
  55    uint32_t dynamic_offset_offset;
  56
  57    /* Index into the array of dynamic input attachment descriptors */
  58    uint32_t input_attachment_offset;
  59
  60    /* Offset in the tu_descriptor_set_layout of the immutable samplers, or 0
  61     * if there are no immutable samplers. */
  62    uint32_t immutable_samplers_offset;
  63
  64    /* Offset in the tu_descriptor_set_layout of the ycbcr samplers, or 0
  65     * if there are no immutable samplers. */
  66    uint32_t ycbcr_samplers_offset;
  67
  68    /* Shader stages that use this binding */
  69    uint32_t shader_stages;
  70 };
  71
  72 struct tu_descriptor_set_layout
  73 {
  74    /* The create flags for this descriptor set layout */
  75    VkDescriptorSetLayoutCreateFlags flags;
  76
  77    /* Number of bindings in this descriptor set */
  78    uint32_t binding_count;
  79
  80    /* Total size of the descriptor set with room for all array entries */
  81    uint32_t size;
  82
  83    /* Shader stages affected by this descriptor set */
  84    uint16_t shader_stages;
  85
  86    /* Number of dynamic offsets used by this descriptor set */
  87    uint16_t dynamic_offset_count;
  88
  89    /* Number of input attachments used by the descriptor set */
  90    uint16_t input_attachment_count;
  91
  92    /* A bitfield of which dynamic buffers are ubo's, to make the
  93     * descriptor-binding-time patching easier.
  94     */
  95    uint32_t dynamic_ubo;
  96
  97    uint32_t buffer_count;
  98
  99    bool has_immutable_samplers;
 100    bool has_variable_descriptors;
 101
 102    /* Bindings in this descriptor set */
 103    struct tu_descriptor_set_binding_layout binding[0];
 104 };
 105
 106 struct tu_pipeline_layout
 107 {
 108    struct
 109    {
 110       struct tu_descriptor_set_layout *layout;
 111       uint32_t size;
 112       uint32_t dynamic_offset_start;
 113       uint32_t input_attachment_start;
 114    } set[MAX_SETS];
 115
 116    uint32_t num_sets;
 117    uint32_t push_constant_size;
 118    uint32_t dynamic_offset_count;
 119    uint32_t input_attachment_count;
 120
 121    unsigned char sha1[20];
 122 };
 123
 124 static inline const uint32_t *
 125 tu_immutable_samplers(const struct tu_descriptor_set_layout *set,
 126                       const struct tu_descriptor_set_binding_layout *binding)
 127 {
 128    return (void *) ((const char *) set + binding->immutable_samplers_offset);
 129 }
 130
 131 static inline const struct tu_sampler_ycbcr_conversion *
 132 tu_immutable_ycbcr_samplers(const struct tu_descriptor_set_layout *set,
 133                             const struct tu_descriptor_set_binding_layout *binding)
 134 {
 135    if (!binding->ycbcr_samplers_offset)
 136       return NULL;
 137
 138    return (void *) ((const char *) set + binding->ycbcr_samplers_offset);
 139 }
 140
 141 #endif /* TU_DESCRIPTOR_SET_H */