1 /* 2 * Copyright © 2012-2018 Rob Clark <robclark@freedesktop.org> 3 * SPDX-License-Identifier: MIT 4 * 5 * Authors: 6 * Rob Clark <robclark@freedesktop.org> 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 assert(regindx); 62 return CP_TYPE4_PKT | cnt | (pm4_odd_parity_bit(cnt) << 7) | 63 ((regindx & 0x3ffff) << 8) | 64 ((pm4_odd_parity_bit(regindx) << 27)); 65 } 66 67 static inline uint32_t pm4_pkt7_hdr(uint8_t opcode,uint16_t cnt)68pm4_pkt7_hdr(uint8_t opcode, uint16_t cnt) 69 { 70 return CP_TYPE7_PKT | cnt | (pm4_odd_parity_bit(cnt) << 15) | 71 ((opcode & 0x7f) << 16) | 72 ((pm4_odd_parity_bit(opcode) << 23)); 73 } 74 75 /* 76 * Helpers for packet parsing: 77 */ 78 79 #define pkt_is_type0(pkt) (((pkt)&0XC0000000) == CP_TYPE0_PKT) 80 #define type0_pkt_size(pkt) ((((pkt) >> 16) & 0x3FFF) + 1) 81 #define type0_pkt_offset(pkt) ((pkt)&0x7FFF) 82 83 #define pkt_is_type2(pkt) ((pkt) == CP_TYPE2_PKT) 84 85 #define pkt_is_type3(pkt) \ 86 ((((pkt)&0xC0000000) == CP_TYPE3_PKT) && (((pkt)&0x80FE) == 0)) 87 88 #define cp_type3_opcode(pkt) (((pkt) >> 8) & 0xFF) 89 #define type3_pkt_size(pkt) ((((pkt) >> 16) & 0x3FFF) + 1) 90 91 static inline unsigned pm4_calc_odd_parity_bit(unsigned val)92pm4_calc_odd_parity_bit(unsigned val) 93 { 94 return (0x9669 >> (0xf & ((val) ^ ((val) >> 4) ^ ((val) >> 8) ^ 95 ((val) >> 12) ^ ((val) >> 16) ^ ((val) >> 20) ^ 96 ((val) >> 24) ^ ((val) >> 28)))) & 97 1; 98 } 99 100 #define pkt_is_type4(pkt) \ 101 ((((pkt)&0xF0000000) == CP_TYPE4_PKT) && \ 102 ((((pkt) >> 27) & 0x1) == \ 103 pm4_calc_odd_parity_bit(type4_pkt_offset(pkt))) && \ 104 ((((pkt) >> 7) & 0x1) == pm4_calc_odd_parity_bit(type4_pkt_size(pkt)))) 105 106 #define type4_pkt_offset(pkt) (((pkt) >> 8) & 0x7FFFF) 107 #define type4_pkt_size(pkt) ((pkt)&0x7F) 108 109 #define pkt_is_type7(pkt) \ 110 ((((pkt)&0xF0000000) == CP_TYPE7_PKT) && (((pkt)&0x0F000000) == 0) && \ 111 ((((pkt) >> 23) & 0x1) == \ 112 pm4_calc_odd_parity_bit(cp_type7_opcode(pkt))) && \ 113 ((((pkt) >> 15) & 0x1) == pm4_calc_odd_parity_bit(type7_pkt_size(pkt)))) 114 115 #define cp_type7_opcode(pkt) (((pkt) >> 16) & 0x7F) 116 #define type7_pkt_size(pkt) ((pkt)&0x3FFF) 117 118 #ifdef __cplusplus 119 } /* end of extern "C" */ 120 #endif 121 122 #endif /* FREEDRENO_PM4_H_ */ 123