1 /* 2 * Copyright © 2012-2018 Rob Clark <[email protected]> 3 * SPDX-License-Identifier: MIT 4 * 5 * Authors: 6 * Rob Clark <[email protected]> 7 */ 8 9 #ifndef FREEDRENO_PM4_H_ 10 #define FREEDRENO_PM4_H_ 11 12 #include <stdint.h> 13 14 #ifdef __cplusplus 15 extern "C" { 16 #endif 17 18 #define CP_TYPE0_PKT 0x00000000 19 #define CP_TYPE2_PKT 0x80000000 20 #define CP_TYPE3_PKT 0xc0000000 21 #define CP_TYPE4_PKT 0x40000000 22 #define CP_TYPE7_PKT 0x70000000 23 24 #define CP_NOP_MESG 0x4D455347 25 #define CP_NOP_BEGN 0x4245474E 26 #define CP_NOP_END 0x454E4400 27 28 /* 29 * Helpers for pm4 pkt header building/parsing: 30 */ 31 32 static inline unsigned pm4_odd_parity_bit(unsigned val)33pm4_odd_parity_bit(unsigned val) 34 { 35 /* See: http://graphics.stanford.edu/~seander/bithacks.html#ParityParallel 36 * note that we want odd parity so 0x6996 is inverted. 37 */ 38 val ^= val >> 16; 39 val ^= val >> 8; 40 val ^= val >> 4; 41 val &= 0xf; 42 return (~0x6996 >> val) & 1; 43 } 44 45 static inline uint32_t pm4_pkt0_hdr(uint16_t regindx,uint16_t cnt)46pm4_pkt0_hdr(uint16_t regindx, uint16_t cnt) 47 { 48 return CP_TYPE0_PKT | ((cnt - 1) << 16) | (regindx & 0x7fff); 49 } 50 51 static inline uint32_t pm4_pkt3_hdr(uint8_t opcode,uint16_t cnt)52pm4_pkt3_hdr(uint8_t opcode, uint16_t cnt) 53 { 54 return CP_TYPE3_PKT | ((cnt - 1) << 16) | ((opcode & 0xff) << 8); 55 } 56 57 static inline uint32_t pm4_pkt4_hdr(uint16_t regindx,uint16_t cnt)58pm4_pkt4_hdr(uint16_t regindx, uint16_t cnt) 59 { 60 assert(cnt < 0x7f); 61 return CP_TYPE4_PKT | cnt | (pm4_odd_parity_bit(cnt) << 7) | 62 ((regindx & 0x3ffff) << 8) | 63 ((pm4_odd_parity_bit(regindx) << 27)); 64 } 65 66 static inline uint32_t pm4_pkt7_hdr(uint8_t opcode,uint16_t cnt)67pm4_pkt7_hdr(uint8_t opcode, uint16_t cnt) 68 { 69 return CP_TYPE7_PKT | cnt | (pm4_odd_parity_bit(cnt) << 15) | 70 ((opcode & 0x7f) << 16) | 71 ((pm4_odd_parity_bit(opcode) << 23)); 72 } 73 74 /* 75 * Helpers for packet parsing: 76 */ 77 78 #define pkt_is_type0(pkt) (((pkt)&0XC0000000) == CP_TYPE0_PKT) 79 #define type0_pkt_size(pkt) ((((pkt) >> 16) & 0x3FFF) + 1) 80 #define type0_pkt_offset(pkt) ((pkt)&0x7FFF) 81 82 #define pkt_is_type2(pkt) ((pkt) == CP_TYPE2_PKT) 83 84 #define pkt_is_type3(pkt) \ 85 ((((pkt)&0xC0000000) == CP_TYPE3_PKT) && (((pkt)&0x80FE) == 0)) 86 87 #define cp_type3_opcode(pkt) (((pkt) >> 8) & 0xFF) 88 #define type3_pkt_size(pkt) ((((pkt) >> 16) & 0x3FFF) + 1) 89 90 static inline unsigned pm4_calc_odd_parity_bit(unsigned val)91pm4_calc_odd_parity_bit(unsigned val) 92 { 93 return (0x9669 >> (0xf & ((val) ^ ((val) >> 4) ^ ((val) >> 8) ^ 94 ((val) >> 12) ^ ((val) >> 16) ^ ((val) >> 20) ^ 95 ((val) >> 24) ^ ((val) >> 28)))) & 96 1; 97 } 98 99 #define pkt_is_type4(pkt) \ 100 ((((pkt)&0xF0000000) == CP_TYPE4_PKT) && \ 101 ((((pkt) >> 27) & 0x1) == \ 102 pm4_calc_odd_parity_bit(type4_pkt_offset(pkt))) && \ 103 ((((pkt) >> 7) & 0x1) == pm4_calc_odd_parity_bit(type4_pkt_size(pkt)))) 104 105 #define type4_pkt_offset(pkt) (((pkt) >> 8) & 0x7FFFF) 106 #define type4_pkt_size(pkt) ((pkt)&0x7F) 107 108 #define pkt_is_type7(pkt) \ 109 ((((pkt)&0xF0000000) == CP_TYPE7_PKT) && (((pkt)&0x0F000000) == 0) && \ 110 ((((pkt) >> 23) & 0x1) == \ 111 pm4_calc_odd_parity_bit(cp_type7_opcode(pkt))) && \ 112 ((((pkt) >> 15) & 0x1) == pm4_calc_odd_parity_bit(type7_pkt_size(pkt)))) 113 114 #define cp_type7_opcode(pkt) (((pkt) >> 16) & 0x7F) 115 #define type7_pkt_size(pkt) ((pkt)&0x3FFF) 116 117 #ifdef __cplusplus 118 } /* end of extern "C" */ 119 #endif 120 121 #endif /* FREEDRENO_PM4_H_ */ 122