136 lines
4.4 KiB
C
136 lines
4.4 KiB
C
/*
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* Copyright (C) 2012-2018 Rob Clark <robclark@freedesktop.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Rob Clark <robclark@freedesktop.org>
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*/
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#ifndef FREEDRENO_PM4_H_
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#define FREEDRENO_PM4_H_
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define CP_TYPE0_PKT 0x00000000
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#define CP_TYPE2_PKT 0x80000000
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#define CP_TYPE3_PKT 0xc0000000
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#define CP_TYPE4_PKT 0x40000000
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#define CP_TYPE7_PKT 0x70000000
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/*
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* Helpers for pm4 pkt header building/parsing:
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*/
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static inline unsigned
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pm4_odd_parity_bit(unsigned val)
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{
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/* See: http://graphics.stanford.edu/~seander/bithacks.html#ParityParallel
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* note that we want odd parity so 0x6996 is inverted.
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*/
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val ^= val >> 16;
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val ^= val >> 8;
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val ^= val >> 4;
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val &= 0xf;
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return (~0x6996 >> val) & 1;
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}
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static inline uint32_t
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pm4_pkt0_hdr(uint16_t regindx, uint16_t cnt)
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{
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return CP_TYPE0_PKT | ((cnt - 1) << 16) | (regindx & 0x7fff);
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}
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static inline uint32_t
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pm4_pkt3_hdr(uint8_t opcode, uint16_t cnt)
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{
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return CP_TYPE3_PKT | ((cnt - 1) << 16) | ((opcode & 0xff) << 8);
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}
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static inline uint32_t
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pm4_pkt4_hdr(uint16_t regindx, uint16_t cnt)
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{
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assert(cnt < 0x7f);
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return CP_TYPE4_PKT | cnt | (pm4_odd_parity_bit(cnt) << 7) |
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((regindx & 0x3ffff) << 8) |
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((pm4_odd_parity_bit(regindx) << 27));
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}
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static inline uint32_t
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pm4_pkt7_hdr(uint8_t opcode, uint16_t cnt)
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{
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return CP_TYPE7_PKT | cnt | (pm4_odd_parity_bit(cnt) << 15) |
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((opcode & 0x7f) << 16) |
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((pm4_odd_parity_bit(opcode) << 23));
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}
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/*
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* Helpers for packet parsing:
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*/
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#define pkt_is_type0(pkt) (((pkt)&0XC0000000) == CP_TYPE0_PKT)
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#define type0_pkt_size(pkt) ((((pkt) >> 16) & 0x3FFF) + 1)
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#define type0_pkt_offset(pkt) ((pkt)&0x7FFF)
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#define pkt_is_type2(pkt) ((pkt) == CP_TYPE2_PKT)
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#define pkt_is_type3(pkt) \
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((((pkt)&0xC0000000) == CP_TYPE3_PKT) && (((pkt)&0x80FE) == 0))
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#define cp_type3_opcode(pkt) (((pkt) >> 8) & 0xFF)
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#define type3_pkt_size(pkt) ((((pkt) >> 16) & 0x3FFF) + 1)
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static inline uint
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pm4_calc_odd_parity_bit(uint val)
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{
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return (0x9669 >> (0xf & ((val) ^ ((val) >> 4) ^ ((val) >> 8) ^
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((val) >> 12) ^ ((val) >> 16) ^ ((val) >> 20) ^
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((val) >> 24) ^ ((val) >> 28)))) &
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1;
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}
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#define pkt_is_type4(pkt) \
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((((pkt)&0xF0000000) == CP_TYPE4_PKT) && \
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((((pkt) >> 27) & 0x1) == \
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pm4_calc_odd_parity_bit(type4_pkt_offset(pkt))) && \
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((((pkt) >> 7) & 0x1) == pm4_calc_odd_parity_bit(type4_pkt_size(pkt))))
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#define type4_pkt_offset(pkt) (((pkt) >> 8) & 0x7FFFF)
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#define type4_pkt_size(pkt) ((pkt)&0x7F)
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#define pkt_is_type7(pkt) \
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((((pkt)&0xF0000000) == CP_TYPE7_PKT) && (((pkt)&0x0F000000) == 0) && \
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((((pkt) >> 23) & 0x1) == \
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pm4_calc_odd_parity_bit(cp_type7_opcode(pkt))) && \
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((((pkt) >> 15) & 0x1) == pm4_calc_odd_parity_bit(type7_pkt_size(pkt))))
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#define cp_type7_opcode(pkt) (((pkt) >> 16) & 0x7F)
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#define type7_pkt_size(pkt) ((pkt)&0x3FFF)
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#ifdef __cplusplus
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} /* end of extern "C" */
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#endif
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#endif /* FREEDRENO_PM4_H_ */
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