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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | /* * Copyright 2019 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: AMD * */ #ifndef _DMUB_RB_H_ #define _DMUB_RB_H_ #include "dmub_types.h" #include "dmub_cmd.h" #if defined(__cplusplus) extern "C" { #endif struct dmub_cmd_header; struct dmub_rb_init_params { void *ctx; void *base_address; uint32_t capacity; }; struct dmub_rb { void *base_address; uint32_t data_count; uint32_t rptr; uint32_t wrpt; uint32_t capacity; void *ctx; void *dmub; }; static inline bool dmub_rb_empty(struct dmub_rb *rb) { return (rb->wrpt == rb->rptr); } static inline bool dmub_rb_full(struct dmub_rb *rb) { uint32_t data_count; if (rb->wrpt >= rb->rptr) data_count = rb->wrpt - rb->rptr; else data_count = rb->capacity - (rb->rptr - rb->wrpt); return (data_count == (rb->capacity - DMUB_RB_CMD_SIZE)); } static inline bool dmub_rb_push_front(struct dmub_rb *rb, const struct dmub_cmd_header *cmd) { uint64_t volatile *dst = (uint64_t volatile *)(rb->base_address) + rb->wrpt / sizeof(uint64_t); const uint64_t *src = (const uint64_t *)cmd; int i; if (dmub_rb_full(rb)) return false; // copying data for (i = 0; i < DMUB_RB_CMD_SIZE / sizeof(uint64_t); i++) *dst++ = *src++; rb->wrpt += DMUB_RB_CMD_SIZE; if (rb->wrpt >= rb->capacity) rb->wrpt %= rb->capacity; return true; } static inline bool dmub_rb_front(struct dmub_rb *rb, struct dmub_cmd_header *cmd) { uint8_t *rd_ptr = (uint8_t *)rb->base_address + rb->rptr; if (dmub_rb_empty(rb)) return false; dmub_memcpy(cmd, rd_ptr, DMUB_RB_CMD_SIZE); return true; } static inline bool dmub_rb_pop_front(struct dmub_rb *rb) { if (dmub_rb_empty(rb)) return false; rb->rptr += DMUB_RB_CMD_SIZE; if (rb->rptr >= rb->capacity) rb->rptr %= rb->capacity; return true; } static inline void dmub_rb_flush_pending(const struct dmub_rb *rb) { uint32_t rptr = rb->rptr; uint32_t wptr = rb->wrpt; while (rptr != wptr) { uint64_t volatile *data = (uint64_t volatile *)rb->base_address + rptr / sizeof(uint64_t); //uint64_t volatile *p = (uint64_t volatile *)data; uint64_t temp; int i; for (i = 0; i < DMUB_RB_CMD_SIZE / sizeof(uint64_t); i++) temp = *data++; rptr += DMUB_RB_CMD_SIZE; if (rptr >= rb->capacity) rptr %= rb->capacity; } } static inline void dmub_rb_init(struct dmub_rb *rb, struct dmub_rb_init_params *init_params) { rb->base_address = init_params->base_address; rb->capacity = init_params->capacity; rb->rptr = 0; rb->wrpt = 0; } #if defined(__cplusplus) } #endif #endif /* _DMUB_RB_H_ */ |