src/freedreno/vulkan/tu_cs.h

   1 /*
   2  * Copyright © 2019 Google LLC
   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 #ifndef TU_CS_H
  24 #define TU_CS_H
  25
  26 #include "tu_private.h"
  27
  28 #include "registers/adreno_pm4.xml.h"
  29
  30 void
  31 tu_cs_init(struct tu_cs *cs, uint32_t initial_size);
  32
  33 void
  34 tu_cs_finish(struct tu_device *dev, struct tu_cs *cs);
  35
  36 void
  37 tu_cs_begin(struct tu_cs *cs);
  38
  39 void
  40 tu_cs_end(struct tu_cs *cs);
  41
  42 VkResult
  43 tu_cs_reserve_space(struct tu_device *dev,
  44                     struct tu_cs *cs,
  45                     uint32_t reserved_size);
  46
  47 void
  48 tu_cs_reset(struct tu_device *dev, struct tu_cs *cs);
  49
  50 /**
  51  * Assert that we did not exceed the reserved space.
  52  */
  53 static inline void
  54 tu_cs_reserve_space_assert(struct tu_cs *cs)
  55 {
  56    assert(cs->cur <= cs->reserved_end);
  57 }
  58
  59 /**
  60  * Emit a uint32_t value into a command stream, without boundary checking.
  61  */
  62 static inline void
  63 tu_cs_emit(struct tu_cs *cs, uint32_t value)
  64 {
  65    assert(cs->cur < cs->end);
  66    *cs->cur = value;
  67    ++cs->cur;
  68 }
  69
  70 static inline unsigned
  71 tu_odd_parity_bit(unsigned val)
  72 {
  73    /* See: http://graphics.stanford.edu/~seander/bithacks.html#ParityParallel
  74     * note that we want odd parity so 0x6996 is inverted.
  75     */
  76    val ^= val >> 16;
  77    val ^= val >> 8;
  78    val ^= val >> 4;
  79    val &= 0xf;
  80    return (~0x6996 >> val) & 1;
  81 }
  82
  83 /**
  84  * Emit a type-4 command packet header into a command stream.
  85  */
  86 static inline void
  87 tu_cs_emit_pkt4(struct tu_cs *cs, uint16_t regindx, uint16_t cnt)
  88 {
  89    tu_cs_emit(cs, CP_TYPE4_PKT | cnt | (tu_odd_parity_bit(cnt) << 7) |
  90                      ((regindx & 0x3ffff) << 8) |
  91                      ((tu_odd_parity_bit(regindx) << 27)));
  92 }
  93
  94 /**
  95  * Emit a type-7 command packet header into a command stream.
  96  */
  97 static inline void
  98 tu_cs_emit_pkt7(struct tu_cs *cs, uint8_t opcode, uint16_t cnt)
  99 {
 100    tu_cs_emit(cs, CP_TYPE7_PKT | cnt | (tu_odd_parity_bit(cnt) << 15) |
 101                      ((opcode & 0x7f) << 16) |
 102                      ((tu_odd_parity_bit(opcode) << 23)));
 103 }
 104
 105 static inline void
 106 tu_cs_emit_wfi(struct tu_cs *cs)
 107 {
 108    tu_cs_emit_pkt7(cs, CP_WAIT_FOR_IDLE, 0);
 109 }
 110
 111 static inline void
 112 tu_cs_emit_qw(struct tu_cs *cs, uint64_t value)
 113 {
 114    tu_cs_emit(cs, (uint32_t) value);
 115    tu_cs_emit(cs, (uint32_t) (value >> 32));
 116 }
 117
 118 static inline void
 119 tu_cs_emit_write_reg(struct tu_cs *cs, uint16_t reg, uint32_t value)
 120 {
 121    tu_cs_emit_pkt4(cs, reg, 1);
 122    tu_cs_emit(cs, value);
 123 }
 124
 125 static inline void
 126 tu_cs_emit_ib(struct tu_cs *cs, const struct tu_cs *target)
 127 {
 128    for (uint32_t i = 0; i < target->entry_count; i++) {
 129       const struct tu_cs_entry *entry = target->entries + i;
 130
 131       tu_cs_emit_pkt7(cs, CP_INDIRECT_BUFFER, 3);
 132       tu_cs_emit_qw(cs, entry->bo->iova + entry->offset);
 133       tu_cs_emit(cs, entry->size / sizeof(uint32_t));
 134    }
 135 }
 136
 137 #endif /* TU_CS_H */