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 "adreno_pm4.xml.h"
  29
  30 void
  31 tu_cs_init(struct tu_cs *cs);
  32 void
  33 tu_cs_finish(struct tu_device *dev, struct tu_cs *cs);
  34 VkResult
  35 tu_cs_begin(struct tu_device *dev, struct tu_cs *cs, uint32_t reserve_size);
  36 VkResult
  37 tu_cs_end(struct tu_cs *cs);
  38 void
  39 tu_cs_reset(struct tu_device *dev, struct tu_cs *cs);
  40 VkResult
  41 tu_cs_check_space(struct tu_device *dev, struct tu_cs *cs, size_t size);
  42
  43 /**
  44  * Emit a uint32_t value into a command stream, without boundary checking.
  45  */
  46 static inline void
  47 tu_cs_emit(struct tu_cs *cs, uint32_t value)
  48 {
  49    assert(cs->cur < cs->end);
  50    *cs->cur = value;
  51    ++cs->cur;
  52 }
  53
  54 static inline unsigned
  55 tu_odd_parity_bit(unsigned val)
  56 {
  57    /* See: http://graphics.stanford.edu/~seander/bithacks.html#ParityParallel
  58     * note that we want odd parity so 0x6996 is inverted.
  59     */
  60    val ^= val >> 16;
  61    val ^= val >> 8;
  62    val ^= val >> 4;
  63    val &= 0xf;
  64    return (~0x6996 >> val) & 1;
  65 }
  66
  67 /**
  68  * Emit a type-4 command packet header into a command stream.
  69  */
  70 static inline void
  71 tu_cs_emit_pkt4(struct tu_cs *cs, uint16_t regindx, uint16_t cnt)
  72 {
  73    tu_cs_emit(cs, CP_TYPE4_PKT | cnt | (tu_odd_parity_bit(cnt) << 7) |
  74                      ((regindx & 0x3ffff) << 8) |
  75                      ((tu_odd_parity_bit(regindx) << 27)));
  76 }
  77
  78 /**
  79  * Emit a type-7 command packet header into a command stream.
  80  */
  81 static inline void
  82 tu_cs_emit_pkt7(struct tu_cs *cs, uint8_t opcode, uint16_t cnt)
  83 {
  84    tu_cs_emit(cs, CP_TYPE7_PKT | cnt | (tu_odd_parity_bit(cnt) << 15) |
  85                      ((opcode & 0x7f) << 16) |
  86                      ((tu_odd_parity_bit(opcode) << 23)));
  87 }
  88
  89 static inline void
  90 tu_cs_emit_wfi5(struct tu_cs *cs)
  91 {
  92    tu_cs_emit_pkt7(cs, CP_WAIT_FOR_IDLE, 0);
  93 }
  94
  95 #endif /* TU_CS_H */