1d9ae7f2bSJakub Kicinski /* 2d9ae7f2bSJakub Kicinski * Copyright (C) 2016 Netronome Systems, Inc. 3d9ae7f2bSJakub Kicinski * 4d9ae7f2bSJakub Kicinski * This software is dual licensed under the GNU General License Version 2, 5d9ae7f2bSJakub Kicinski * June 1991 as shown in the file COPYING in the top-level directory of this 6d9ae7f2bSJakub Kicinski * source tree or the BSD 2-Clause License provided below. You have the 7d9ae7f2bSJakub Kicinski * option to license this software under the complete terms of either license. 8d9ae7f2bSJakub Kicinski * 9d9ae7f2bSJakub Kicinski * The BSD 2-Clause License: 10d9ae7f2bSJakub Kicinski * 11d9ae7f2bSJakub Kicinski * Redistribution and use in source and binary forms, with or 12d9ae7f2bSJakub Kicinski * without modification, are permitted provided that the following 13d9ae7f2bSJakub Kicinski * conditions are met: 14d9ae7f2bSJakub Kicinski * 15d9ae7f2bSJakub Kicinski * 1. Redistributions of source code must retain the above 16d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 17d9ae7f2bSJakub Kicinski * disclaimer. 18d9ae7f2bSJakub Kicinski * 19d9ae7f2bSJakub Kicinski * 2. Redistributions in binary form must reproduce the above 20d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 21d9ae7f2bSJakub Kicinski * disclaimer in the documentation and/or other materials 22d9ae7f2bSJakub Kicinski * provided with the distribution. 23d9ae7f2bSJakub Kicinski * 24d9ae7f2bSJakub Kicinski * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25d9ae7f2bSJakub Kicinski * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26d9ae7f2bSJakub Kicinski * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27d9ae7f2bSJakub Kicinski * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28d9ae7f2bSJakub Kicinski * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29d9ae7f2bSJakub Kicinski * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30d9ae7f2bSJakub Kicinski * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31d9ae7f2bSJakub Kicinski * SOFTWARE. 32d9ae7f2bSJakub Kicinski */ 33d9ae7f2bSJakub Kicinski 34d9ae7f2bSJakub Kicinski #define pr_fmt(fmt) "NFP net bpf: " fmt 35d9ae7f2bSJakub Kicinski 36d9ae7f2bSJakub Kicinski #include <linux/kernel.h> 37d9ae7f2bSJakub Kicinski #include <linux/bpf.h> 38d9ae7f2bSJakub Kicinski #include <linux/filter.h> 39d9ae7f2bSJakub Kicinski #include <linux/pkt_cls.h> 40d9ae7f2bSJakub Kicinski #include <linux/unistd.h> 41d9ae7f2bSJakub Kicinski 42d9ae7f2bSJakub Kicinski #include "main.h" 43d9ae7f2bSJakub Kicinski #include "../nfp_asm.h" 44d9ae7f2bSJakub Kicinski 45d9ae7f2bSJakub Kicinski /* --- NFP prog --- */ 46d9ae7f2bSJakub Kicinski /* Foreach "multiple" entries macros provide pos and next<n> pointers. 47d9ae7f2bSJakub Kicinski * It's safe to modify the next pointers (but not pos). 48d9ae7f2bSJakub Kicinski */ 49d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk2(nfp_prog, pos, next) \ 50d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 51d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l); \ 52d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 53d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l; \ 54d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 55d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos)) 56d9ae7f2bSJakub Kicinski 57d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk3(nfp_prog, pos, next, next2) \ 58d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 59d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l), \ 60d9ae7f2bSJakub Kicinski next2 = list_next_entry(next, l); \ 61d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 62d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l && \ 63d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next2->l; \ 64d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 65d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos), \ 66d9ae7f2bSJakub Kicinski next2 = nfp_meta_next(next)) 67d9ae7f2bSJakub Kicinski 68d9ae7f2bSJakub Kicinski static bool 69d9ae7f2bSJakub Kicinski nfp_meta_has_next(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 70d9ae7f2bSJakub Kicinski { 71d9ae7f2bSJakub Kicinski return meta->l.next != &nfp_prog->insns; 72d9ae7f2bSJakub Kicinski } 73d9ae7f2bSJakub Kicinski 74d9ae7f2bSJakub Kicinski static bool 75d9ae7f2bSJakub Kicinski nfp_meta_has_prev(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 76d9ae7f2bSJakub Kicinski { 77d9ae7f2bSJakub Kicinski return meta->l.prev != &nfp_prog->insns; 78d9ae7f2bSJakub Kicinski } 79d9ae7f2bSJakub Kicinski 80d9ae7f2bSJakub Kicinski static void nfp_prog_free(struct nfp_prog *nfp_prog) 81d9ae7f2bSJakub Kicinski { 82d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta, *tmp; 83d9ae7f2bSJakub Kicinski 84d9ae7f2bSJakub Kicinski list_for_each_entry_safe(meta, tmp, &nfp_prog->insns, l) { 85d9ae7f2bSJakub Kicinski list_del(&meta->l); 86d9ae7f2bSJakub Kicinski kfree(meta); 87d9ae7f2bSJakub Kicinski } 88d9ae7f2bSJakub Kicinski kfree(nfp_prog); 89d9ae7f2bSJakub Kicinski } 90d9ae7f2bSJakub Kicinski 91d9ae7f2bSJakub Kicinski static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn) 92d9ae7f2bSJakub Kicinski { 93d9ae7f2bSJakub Kicinski if (nfp_prog->__prog_alloc_len == nfp_prog->prog_len) { 94d9ae7f2bSJakub Kicinski nfp_prog->error = -ENOSPC; 95d9ae7f2bSJakub Kicinski return; 96d9ae7f2bSJakub Kicinski } 97d9ae7f2bSJakub Kicinski 98d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len] = insn; 99d9ae7f2bSJakub Kicinski nfp_prog->prog_len++; 100d9ae7f2bSJakub Kicinski } 101d9ae7f2bSJakub Kicinski 102d9ae7f2bSJakub Kicinski static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) 103d9ae7f2bSJakub Kicinski { 104d9ae7f2bSJakub Kicinski return nfp_prog->start_off + nfp_prog->prog_len; 105d9ae7f2bSJakub Kicinski } 106d9ae7f2bSJakub Kicinski 107d9ae7f2bSJakub Kicinski static unsigned int 108d9ae7f2bSJakub Kicinski nfp_prog_offset_to_index(struct nfp_prog *nfp_prog, unsigned int offset) 109d9ae7f2bSJakub Kicinski { 110d9ae7f2bSJakub Kicinski return offset - nfp_prog->start_off; 111d9ae7f2bSJakub Kicinski } 112d9ae7f2bSJakub Kicinski 113d9ae7f2bSJakub Kicinski /* --- SW reg --- */ 114d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs { 115d9ae7f2bSJakub Kicinski enum alu_dst_ab dst_ab; 116d9ae7f2bSJakub Kicinski u16 dst; 117d9ae7f2bSJakub Kicinski u16 areg, breg; 118d9ae7f2bSJakub Kicinski bool swap; 119d9ae7f2bSJakub Kicinski bool wr_both; 120d9ae7f2bSJakub Kicinski }; 121d9ae7f2bSJakub Kicinski 122d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs { 123d9ae7f2bSJakub Kicinski enum alu_dst_ab dst_ab; 124d9ae7f2bSJakub Kicinski u8 dst; 125d9ae7f2bSJakub Kicinski u8 areg, breg; 126d9ae7f2bSJakub Kicinski bool swap; 127d9ae7f2bSJakub Kicinski bool wr_both; 128d9ae7f2bSJakub Kicinski bool i8; 129d9ae7f2bSJakub Kicinski }; 130d9ae7f2bSJakub Kicinski 131d9ae7f2bSJakub Kicinski static u16 nfp_swreg_to_unreg(u32 swreg, bool is_dst) 132d9ae7f2bSJakub Kicinski { 133d9ae7f2bSJakub Kicinski u16 val = FIELD_GET(NN_REG_VAL, swreg); 134d9ae7f2bSJakub Kicinski 135d9ae7f2bSJakub Kicinski switch (FIELD_GET(NN_REG_TYPE, swreg)) { 136d9ae7f2bSJakub Kicinski case NN_REG_GPR_A: 137d9ae7f2bSJakub Kicinski case NN_REG_GPR_B: 138d9ae7f2bSJakub Kicinski case NN_REG_GPR_BOTH: 139d9ae7f2bSJakub Kicinski return val; 140d9ae7f2bSJakub Kicinski case NN_REG_NNR: 141d9ae7f2bSJakub Kicinski return UR_REG_NN | val; 142d9ae7f2bSJakub Kicinski case NN_REG_XFER: 143d9ae7f2bSJakub Kicinski return UR_REG_XFR | val; 144d9ae7f2bSJakub Kicinski case NN_REG_IMM: 145d9ae7f2bSJakub Kicinski if (val & ~0xff) { 146d9ae7f2bSJakub Kicinski pr_err("immediate too large\n"); 147d9ae7f2bSJakub Kicinski return 0; 148d9ae7f2bSJakub Kicinski } 149d9ae7f2bSJakub Kicinski return UR_REG_IMM_encode(val); 150d9ae7f2bSJakub Kicinski case NN_REG_NONE: 151d9ae7f2bSJakub Kicinski return is_dst ? UR_REG_NO_DST : REG_NONE; 152d9ae7f2bSJakub Kicinski default: 153d9ae7f2bSJakub Kicinski pr_err("unrecognized reg encoding %08x\n", swreg); 154d9ae7f2bSJakub Kicinski return 0; 155d9ae7f2bSJakub Kicinski } 156d9ae7f2bSJakub Kicinski } 157d9ae7f2bSJakub Kicinski 158d9ae7f2bSJakub Kicinski static int 159d9ae7f2bSJakub Kicinski swreg_to_unrestricted(u32 dst, u32 lreg, u32 rreg, struct nfp_insn_ur_regs *reg) 160d9ae7f2bSJakub Kicinski { 161d9ae7f2bSJakub Kicinski memset(reg, 0, sizeof(*reg)); 162d9ae7f2bSJakub Kicinski 163d9ae7f2bSJakub Kicinski /* Decode destination */ 164d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, dst) == NN_REG_IMM) 165d9ae7f2bSJakub Kicinski return -EFAULT; 166d9ae7f2bSJakub Kicinski 167d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, dst) == NN_REG_GPR_B) 168d9ae7f2bSJakub Kicinski reg->dst_ab = ALU_DST_B; 169d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, dst) == NN_REG_GPR_BOTH) 170d9ae7f2bSJakub Kicinski reg->wr_both = true; 171d9ae7f2bSJakub Kicinski reg->dst = nfp_swreg_to_unreg(dst, true); 172d9ae7f2bSJakub Kicinski 173d9ae7f2bSJakub Kicinski /* Decode source operands */ 174d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, lreg) == FIELD_GET(NN_REG_TYPE, rreg)) 175d9ae7f2bSJakub Kicinski return -EFAULT; 176d9ae7f2bSJakub Kicinski 177d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, lreg) == NN_REG_GPR_B || 178d9ae7f2bSJakub Kicinski FIELD_GET(NN_REG_TYPE, rreg) == NN_REG_GPR_A) { 179d9ae7f2bSJakub Kicinski reg->areg = nfp_swreg_to_unreg(rreg, false); 180d9ae7f2bSJakub Kicinski reg->breg = nfp_swreg_to_unreg(lreg, false); 181d9ae7f2bSJakub Kicinski reg->swap = true; 182d9ae7f2bSJakub Kicinski } else { 183d9ae7f2bSJakub Kicinski reg->areg = nfp_swreg_to_unreg(lreg, false); 184d9ae7f2bSJakub Kicinski reg->breg = nfp_swreg_to_unreg(rreg, false); 185d9ae7f2bSJakub Kicinski } 186d9ae7f2bSJakub Kicinski 187d9ae7f2bSJakub Kicinski return 0; 188d9ae7f2bSJakub Kicinski } 189d9ae7f2bSJakub Kicinski 190d9ae7f2bSJakub Kicinski static u16 nfp_swreg_to_rereg(u32 swreg, bool is_dst, bool has_imm8, bool *i8) 191d9ae7f2bSJakub Kicinski { 192d9ae7f2bSJakub Kicinski u16 val = FIELD_GET(NN_REG_VAL, swreg); 193d9ae7f2bSJakub Kicinski 194d9ae7f2bSJakub Kicinski switch (FIELD_GET(NN_REG_TYPE, swreg)) { 195d9ae7f2bSJakub Kicinski case NN_REG_GPR_A: 196d9ae7f2bSJakub Kicinski case NN_REG_GPR_B: 197d9ae7f2bSJakub Kicinski case NN_REG_GPR_BOTH: 198d9ae7f2bSJakub Kicinski return val; 199d9ae7f2bSJakub Kicinski case NN_REG_XFER: 200d9ae7f2bSJakub Kicinski return RE_REG_XFR | val; 201d9ae7f2bSJakub Kicinski case NN_REG_IMM: 202d9ae7f2bSJakub Kicinski if (val & ~(0x7f | has_imm8 << 7)) { 203d9ae7f2bSJakub Kicinski pr_err("immediate too large\n"); 204d9ae7f2bSJakub Kicinski return 0; 205d9ae7f2bSJakub Kicinski } 206d9ae7f2bSJakub Kicinski *i8 = val & 0x80; 207d9ae7f2bSJakub Kicinski return RE_REG_IMM_encode(val & 0x7f); 208d9ae7f2bSJakub Kicinski case NN_REG_NONE: 209d9ae7f2bSJakub Kicinski return is_dst ? RE_REG_NO_DST : REG_NONE; 210d9ae7f2bSJakub Kicinski default: 211d9ae7f2bSJakub Kicinski pr_err("unrecognized reg encoding\n"); 212d9ae7f2bSJakub Kicinski return 0; 213d9ae7f2bSJakub Kicinski } 214d9ae7f2bSJakub Kicinski } 215d9ae7f2bSJakub Kicinski 216d9ae7f2bSJakub Kicinski static int 217d9ae7f2bSJakub Kicinski swreg_to_restricted(u32 dst, u32 lreg, u32 rreg, struct nfp_insn_re_regs *reg, 218d9ae7f2bSJakub Kicinski bool has_imm8) 219d9ae7f2bSJakub Kicinski { 220d9ae7f2bSJakub Kicinski memset(reg, 0, sizeof(*reg)); 221d9ae7f2bSJakub Kicinski 222d9ae7f2bSJakub Kicinski /* Decode destination */ 223d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, dst) == NN_REG_IMM) 224d9ae7f2bSJakub Kicinski return -EFAULT; 225d9ae7f2bSJakub Kicinski 226d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, dst) == NN_REG_GPR_B) 227d9ae7f2bSJakub Kicinski reg->dst_ab = ALU_DST_B; 228d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, dst) == NN_REG_GPR_BOTH) 229d9ae7f2bSJakub Kicinski reg->wr_both = true; 230d9ae7f2bSJakub Kicinski reg->dst = nfp_swreg_to_rereg(dst, true, false, NULL); 231d9ae7f2bSJakub Kicinski 232d9ae7f2bSJakub Kicinski /* Decode source operands */ 233d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, lreg) == FIELD_GET(NN_REG_TYPE, rreg)) 234d9ae7f2bSJakub Kicinski return -EFAULT; 235d9ae7f2bSJakub Kicinski 236d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, lreg) == NN_REG_GPR_B || 237d9ae7f2bSJakub Kicinski FIELD_GET(NN_REG_TYPE, rreg) == NN_REG_GPR_A) { 238d9ae7f2bSJakub Kicinski reg->areg = nfp_swreg_to_rereg(rreg, false, has_imm8, ®->i8); 239d9ae7f2bSJakub Kicinski reg->breg = nfp_swreg_to_rereg(lreg, false, has_imm8, ®->i8); 240d9ae7f2bSJakub Kicinski reg->swap = true; 241d9ae7f2bSJakub Kicinski } else { 242d9ae7f2bSJakub Kicinski reg->areg = nfp_swreg_to_rereg(lreg, false, has_imm8, ®->i8); 243d9ae7f2bSJakub Kicinski reg->breg = nfp_swreg_to_rereg(rreg, false, has_imm8, ®->i8); 244d9ae7f2bSJakub Kicinski } 245d9ae7f2bSJakub Kicinski 246d9ae7f2bSJakub Kicinski return 0; 247d9ae7f2bSJakub Kicinski } 248d9ae7f2bSJakub Kicinski 249d9ae7f2bSJakub Kicinski /* --- Emitters --- */ 250d9ae7f2bSJakub Kicinski static const struct cmd_tgt_act cmd_tgt_act[__CMD_TGT_MAP_SIZE] = { 251d9ae7f2bSJakub Kicinski [CMD_TGT_WRITE8] = { 0x00, 0x42 }, 252d9ae7f2bSJakub Kicinski [CMD_TGT_READ8] = { 0x01, 0x43 }, 253d9ae7f2bSJakub Kicinski [CMD_TGT_READ_LE] = { 0x01, 0x40 }, 254d9ae7f2bSJakub Kicinski [CMD_TGT_READ_SWAP_LE] = { 0x03, 0x40 }, 255d9ae7f2bSJakub Kicinski }; 256d9ae7f2bSJakub Kicinski 257d9ae7f2bSJakub Kicinski static void 258d9ae7f2bSJakub Kicinski __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 259d9ae7f2bSJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, bool sync) 260d9ae7f2bSJakub Kicinski { 261d9ae7f2bSJakub Kicinski enum cmd_ctx_swap ctx; 262d9ae7f2bSJakub Kicinski u64 insn; 263d9ae7f2bSJakub Kicinski 264d9ae7f2bSJakub Kicinski if (sync) 265d9ae7f2bSJakub Kicinski ctx = CMD_CTX_SWAP; 266d9ae7f2bSJakub Kicinski else 267d9ae7f2bSJakub Kicinski ctx = CMD_CTX_NO_SWAP; 268d9ae7f2bSJakub Kicinski 269d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 270d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 271d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 272d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 273d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 274d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 275d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_SIG, sync) | 276d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 277d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 278d9ae7f2bSJakub Kicinski 279d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 280d9ae7f2bSJakub Kicinski } 281d9ae7f2bSJakub Kicinski 282d9ae7f2bSJakub Kicinski static void 283d9ae7f2bSJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 284d9ae7f2bSJakub Kicinski u8 mode, u8 xfer, u32 lreg, u32 rreg, u8 size, bool sync) 285d9ae7f2bSJakub Kicinski { 286d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 287d9ae7f2bSJakub Kicinski int err; 288d9ae7f2bSJakub Kicinski 289d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 290d9ae7f2bSJakub Kicinski if (err) { 291d9ae7f2bSJakub Kicinski nfp_prog->error = err; 292d9ae7f2bSJakub Kicinski return; 293d9ae7f2bSJakub Kicinski } 294d9ae7f2bSJakub Kicinski if (reg.swap) { 295d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 296d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 297d9ae7f2bSJakub Kicinski return; 298d9ae7f2bSJakub Kicinski } 299d9ae7f2bSJakub Kicinski 300d9ae7f2bSJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, sync); 301d9ae7f2bSJakub Kicinski } 302d9ae7f2bSJakub Kicinski 303d9ae7f2bSJakub Kicinski static void 304d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 305d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 306d9ae7f2bSJakub Kicinski { 307d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 308d9ae7f2bSJakub Kicinski u64 insn; 309d9ae7f2bSJakub Kicinski 310d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 311d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 312d9ae7f2bSJakub Kicinski 313d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 314d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 315d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 316d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 317d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 318d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 319d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 320d9ae7f2bSJakub Kicinski 321d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 322d9ae7f2bSJakub Kicinski } 323d9ae7f2bSJakub Kicinski 324d9ae7f2bSJakub Kicinski static void emit_br_def(struct nfp_prog *nfp_prog, u16 addr, u8 defer) 325d9ae7f2bSJakub Kicinski { 326d9ae7f2bSJakub Kicinski if (defer > 2) { 327d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 328d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 329d9ae7f2bSJakub Kicinski return; 330d9ae7f2bSJakub Kicinski } 331d9ae7f2bSJakub Kicinski __emit_br(nfp_prog, BR_UNC, BR_EV_PIP_UNCOND, BR_CSS_NONE, addr, defer); 332d9ae7f2bSJakub Kicinski } 333d9ae7f2bSJakub Kicinski 334d9ae7f2bSJakub Kicinski static void 335d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 336d9ae7f2bSJakub Kicinski { 337d9ae7f2bSJakub Kicinski __emit_br(nfp_prog, mask, 338d9ae7f2bSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 339d9ae7f2bSJakub Kicinski BR_CSS_NONE, addr, defer); 340d9ae7f2bSJakub Kicinski } 341d9ae7f2bSJakub Kicinski 342d9ae7f2bSJakub Kicinski static void 343d9ae7f2bSJakub Kicinski __emit_br_byte(struct nfp_prog *nfp_prog, u8 areg, u8 breg, bool imm8, 344d9ae7f2bSJakub Kicinski u8 byte, bool equal, u16 addr, u8 defer) 345d9ae7f2bSJakub Kicinski { 346d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 347d9ae7f2bSJakub Kicinski u64 insn; 348d9ae7f2bSJakub Kicinski 349d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BB_ADDR_LO >> __bf_shf(OP_BB_ADDR_LO)); 350d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 351d9ae7f2bSJakub Kicinski 352d9ae7f2bSJakub Kicinski insn = OP_BBYTE_BASE | 353d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BB_A_SRC, areg) | 354d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BB_BYTE, byte) | 355d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BB_B_SRC, breg) | 356d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BB_I8, imm8) | 357d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BB_EQ, equal) | 358d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BB_DEFBR, defer) | 359d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BB_ADDR_LO, addr_lo) | 360d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BB_ADDR_HI, addr_hi); 361d9ae7f2bSJakub Kicinski 362d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 363d9ae7f2bSJakub Kicinski } 364d9ae7f2bSJakub Kicinski 365d9ae7f2bSJakub Kicinski static void 366d9ae7f2bSJakub Kicinski emit_br_byte_neq(struct nfp_prog *nfp_prog, 367d9ae7f2bSJakub Kicinski u32 dst, u8 imm, u8 byte, u16 addr, u8 defer) 368d9ae7f2bSJakub Kicinski { 369d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 370d9ae7f2bSJakub Kicinski int err; 371d9ae7f2bSJakub Kicinski 372d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), dst, reg_imm(imm), ®, true); 373d9ae7f2bSJakub Kicinski if (err) { 374d9ae7f2bSJakub Kicinski nfp_prog->error = err; 375d9ae7f2bSJakub Kicinski return; 376d9ae7f2bSJakub Kicinski } 377d9ae7f2bSJakub Kicinski 378d9ae7f2bSJakub Kicinski __emit_br_byte(nfp_prog, reg.areg, reg.breg, reg.i8, byte, false, addr, 379d9ae7f2bSJakub Kicinski defer); 380d9ae7f2bSJakub Kicinski } 381d9ae7f2bSJakub Kicinski 382d9ae7f2bSJakub Kicinski static void 383d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 384d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 385d9ae7f2bSJakub Kicinski enum immed_shift shift, bool wr_both) 386d9ae7f2bSJakub Kicinski { 387d9ae7f2bSJakub Kicinski u64 insn; 388d9ae7f2bSJakub Kicinski 389d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 390d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 391d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 392d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 393d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 394d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 395d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 396d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both); 397d9ae7f2bSJakub Kicinski 398d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 399d9ae7f2bSJakub Kicinski } 400d9ae7f2bSJakub Kicinski 401d9ae7f2bSJakub Kicinski static void 402d9ae7f2bSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, u32 dst, u16 imm, 403d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 404d9ae7f2bSJakub Kicinski { 405d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 406d9ae7f2bSJakub Kicinski int err; 407d9ae7f2bSJakub Kicinski 408d9ae7f2bSJakub Kicinski if (FIELD_GET(NN_REG_TYPE, dst) == NN_REG_IMM) { 409d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 410d9ae7f2bSJakub Kicinski return; 411d9ae7f2bSJakub Kicinski } 412d9ae7f2bSJakub Kicinski 413d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 414d9ae7f2bSJakub Kicinski if (err) { 415d9ae7f2bSJakub Kicinski nfp_prog->error = err; 416d9ae7f2bSJakub Kicinski return; 417d9ae7f2bSJakub Kicinski } 418d9ae7f2bSJakub Kicinski 419d9ae7f2bSJakub Kicinski __emit_immed(nfp_prog, reg.areg, reg.breg, imm >> 8, width, 420d9ae7f2bSJakub Kicinski invert, shift, reg.wr_both); 421d9ae7f2bSJakub Kicinski } 422d9ae7f2bSJakub Kicinski 423d9ae7f2bSJakub Kicinski static void 424d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 425d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 426d9ae7f2bSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both) 427d9ae7f2bSJakub Kicinski { 428d9ae7f2bSJakub Kicinski u64 insn; 429d9ae7f2bSJakub Kicinski 430d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 431d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 432d9ae7f2bSJakub Kicinski return; 433d9ae7f2bSJakub Kicinski } 434d9ae7f2bSJakub Kicinski 435d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 436d9ae7f2bSJakub Kicinski shift = 32 - shift; 437d9ae7f2bSJakub Kicinski 438d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 439d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 440d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 441d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 442d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 443d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 444d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 445d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 446d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 447d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 448d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both); 449d9ae7f2bSJakub Kicinski 450d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 451d9ae7f2bSJakub Kicinski } 452d9ae7f2bSJakub Kicinski 453d9ae7f2bSJakub Kicinski static void 454d9ae7f2bSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, u32 dst, u32 lreg, enum shf_op op, u32 rreg, 455d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 456d9ae7f2bSJakub Kicinski { 457d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 458d9ae7f2bSJakub Kicinski int err; 459d9ae7f2bSJakub Kicinski 460d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 461d9ae7f2bSJakub Kicinski if (err) { 462d9ae7f2bSJakub Kicinski nfp_prog->error = err; 463d9ae7f2bSJakub Kicinski return; 464d9ae7f2bSJakub Kicinski } 465d9ae7f2bSJakub Kicinski 466d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 467d9ae7f2bSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both); 468d9ae7f2bSJakub Kicinski } 469d9ae7f2bSJakub Kicinski 470d9ae7f2bSJakub Kicinski static void 471d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 472d9ae7f2bSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both) 473d9ae7f2bSJakub Kicinski { 474d9ae7f2bSJakub Kicinski u64 insn; 475d9ae7f2bSJakub Kicinski 476d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 477d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 478d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 479d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 480d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 481d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 482d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 483d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both); 484d9ae7f2bSJakub Kicinski 485d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 486d9ae7f2bSJakub Kicinski } 487d9ae7f2bSJakub Kicinski 488d9ae7f2bSJakub Kicinski static void 489d9ae7f2bSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, u32 dst, u32 lreg, enum alu_op op, u32 rreg) 490d9ae7f2bSJakub Kicinski { 491d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 492d9ae7f2bSJakub Kicinski int err; 493d9ae7f2bSJakub Kicinski 494d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 495d9ae7f2bSJakub Kicinski if (err) { 496d9ae7f2bSJakub Kicinski nfp_prog->error = err; 497d9ae7f2bSJakub Kicinski return; 498d9ae7f2bSJakub Kicinski } 499d9ae7f2bSJakub Kicinski 500d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 501d9ae7f2bSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both); 502d9ae7f2bSJakub Kicinski } 503d9ae7f2bSJakub Kicinski 504d9ae7f2bSJakub Kicinski static void 505d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 506d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 507d9ae7f2bSJakub Kicinski bool zero, bool swap, bool wr_both) 508d9ae7f2bSJakub Kicinski { 509d9ae7f2bSJakub Kicinski u64 insn; 510d9ae7f2bSJakub Kicinski 511d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 512d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 513d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 514d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 515d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 516d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 517d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 518d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 519d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 520d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both); 521d9ae7f2bSJakub Kicinski 522d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 523d9ae7f2bSJakub Kicinski } 524d9ae7f2bSJakub Kicinski 525d9ae7f2bSJakub Kicinski static void 526d9ae7f2bSJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, enum shf_sc sc, u8 shift, 527d9ae7f2bSJakub Kicinski u32 dst, u8 bmask, u32 src, bool zero) 528d9ae7f2bSJakub Kicinski { 529d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 530d9ae7f2bSJakub Kicinski int err; 531d9ae7f2bSJakub Kicinski 532d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), dst, src, ®, true); 533d9ae7f2bSJakub Kicinski if (err) { 534d9ae7f2bSJakub Kicinski nfp_prog->error = err; 535d9ae7f2bSJakub Kicinski return; 536d9ae7f2bSJakub Kicinski } 537d9ae7f2bSJakub Kicinski 538d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 539d9ae7f2bSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both); 540d9ae7f2bSJakub Kicinski } 541d9ae7f2bSJakub Kicinski 542d9ae7f2bSJakub Kicinski static void 543d9ae7f2bSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, u32 dst, u8 bmask, u32 src, 544d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 545d9ae7f2bSJakub Kicinski { 546d9ae7f2bSJakub Kicinski emit_ld_field_any(nfp_prog, sc, shift, dst, bmask, src, false); 547d9ae7f2bSJakub Kicinski } 548d9ae7f2bSJakub Kicinski 549d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 550d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 551d9ae7f2bSJakub Kicinski { 552d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 553d9ae7f2bSJakub Kicinski *val = imm; 554d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 555d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 556d9ae7f2bSJakub Kicinski *val = imm >> 8; 557d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 558d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 559d9ae7f2bSJakub Kicinski *val = imm >> 16; 560d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 561d9ae7f2bSJakub Kicinski } else { 562d9ae7f2bSJakub Kicinski return false; 563d9ae7f2bSJakub Kicinski } 564d9ae7f2bSJakub Kicinski 565d9ae7f2bSJakub Kicinski return true; 566d9ae7f2bSJakub Kicinski } 567d9ae7f2bSJakub Kicinski 568d9ae7f2bSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, u32 dst, u32 imm) 569d9ae7f2bSJakub Kicinski { 570d9ae7f2bSJakub Kicinski enum immed_shift shift; 571d9ae7f2bSJakub Kicinski u16 val; 572d9ae7f2bSJakub Kicinski 573d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 574d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 575d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 576d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 577d9ae7f2bSJakub Kicinski } else { 578d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 579d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 580d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 581d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 582d9ae7f2bSJakub Kicinski } 583d9ae7f2bSJakub Kicinski } 584d9ae7f2bSJakub Kicinski 585d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 586d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 587d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 588d9ae7f2bSJakub Kicinski */ 589d9ae7f2bSJakub Kicinski static u32 ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, u32 tmp_reg) 590d9ae7f2bSJakub Kicinski { 591d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 592d9ae7f2bSJakub Kicinski return reg_imm(imm); 593d9ae7f2bSJakub Kicinski 594d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 595d9ae7f2bSJakub Kicinski return tmp_reg; 596d9ae7f2bSJakub Kicinski } 597d9ae7f2bSJakub Kicinski 598d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 599d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 600d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 601d9ae7f2bSJakub Kicinski */ 602d9ae7f2bSJakub Kicinski static u32 re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, u32 tmp_reg) 603d9ae7f2bSJakub Kicinski { 604d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 605d9ae7f2bSJakub Kicinski return reg_imm(imm); 606d9ae7f2bSJakub Kicinski 607d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 608d9ae7f2bSJakub Kicinski return tmp_reg; 609d9ae7f2bSJakub Kicinski } 610d9ae7f2bSJakub Kicinski 611d9ae7f2bSJakub Kicinski static void 612d9ae7f2bSJakub Kicinski wrp_br_special(struct nfp_prog *nfp_prog, enum br_mask mask, 613d9ae7f2bSJakub Kicinski enum br_special special) 614d9ae7f2bSJakub Kicinski { 615d9ae7f2bSJakub Kicinski emit_br(nfp_prog, mask, 0, 0); 616d9ae7f2bSJakub Kicinski 617d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 618d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_SPECIAL, special); 619d9ae7f2bSJakub Kicinski } 620d9ae7f2bSJakub Kicinski 621d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 622d9ae7f2bSJakub Kicinski { 623d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), ALU_OP_NONE, reg_b(src)); 624d9ae7f2bSJakub Kicinski } 625d9ae7f2bSJakub Kicinski 626d9ae7f2bSJakub Kicinski static int 627d9ae7f2bSJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, 628d9ae7f2bSJakub Kicinski u16 src, bool src_valid, u8 size) 629d9ae7f2bSJakub Kicinski { 630d9ae7f2bSJakub Kicinski unsigned int i; 631d9ae7f2bSJakub Kicinski u16 shift, sz; 632d9ae7f2bSJakub Kicinski u32 tmp_reg; 633d9ae7f2bSJakub Kicinski 634d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 635d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 636d9ae7f2bSJakub Kicinski */ 637d9ae7f2bSJakub Kicinski sz = size < 4 ? 4 : size; 638d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 639d9ae7f2bSJakub Kicinski 640d9ae7f2bSJakub Kicinski if (src_valid) { 641d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 642d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 643d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), 644d9ae7f2bSJakub Kicinski reg_a(src), ALU_OP_ADD, tmp_reg); 645d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 646d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 647d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 648d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 649d9ae7f2bSJakub Kicinski NFP_BPF_ABI_LEN, ALU_OP_SUB, imm_a(nfp_prog)); 650d9ae7f2bSJakub Kicinski wrp_br_special(nfp_prog, BR_BLO, OP_BR_GO_ABORT); 651d9ae7f2bSJakub Kicinski /* Load data */ 652d9ae7f2bSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 653d9ae7f2bSJakub Kicinski pkt_reg(nfp_prog), imm_b(nfp_prog), sz - 1, true); 654d9ae7f2bSJakub Kicinski } else { 655d9ae7f2bSJakub Kicinski /* Check packet length */ 656d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, 657d9ae7f2bSJakub Kicinski imm_a(nfp_prog)); 658d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 659d9ae7f2bSJakub Kicinski NFP_BPF_ABI_LEN, ALU_OP_SUB, tmp_reg); 660d9ae7f2bSJakub Kicinski wrp_br_special(nfp_prog, BR_BLO, OP_BR_GO_ABORT); 661d9ae7f2bSJakub Kicinski /* Load data */ 662d9ae7f2bSJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 663d9ae7f2bSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 664d9ae7f2bSJakub Kicinski pkt_reg(nfp_prog), tmp_reg, sz - 1, true); 665d9ae7f2bSJakub Kicinski } 666d9ae7f2bSJakub Kicinski 667d9ae7f2bSJakub Kicinski i = 0; 668d9ae7f2bSJakub Kicinski if (shift) 669d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(0), reg_none(), SHF_OP_NONE, 670d9ae7f2bSJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 671d9ae7f2bSJakub Kicinski else 672d9ae7f2bSJakub Kicinski for (; i * 4 < size; i++) 673d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(i), 674d9ae7f2bSJakub Kicinski reg_none(), ALU_OP_NONE, reg_xfer(i)); 675d9ae7f2bSJakub Kicinski 676d9ae7f2bSJakub Kicinski if (i < 2) 677d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 678d9ae7f2bSJakub Kicinski 679d9ae7f2bSJakub Kicinski return 0; 680d9ae7f2bSJakub Kicinski } 681d9ae7f2bSJakub Kicinski 682d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 683d9ae7f2bSJakub Kicinski { 684d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, offset, 0, false, size); 685d9ae7f2bSJakub Kicinski } 686d9ae7f2bSJakub Kicinski 687d9ae7f2bSJakub Kicinski static int wrp_set_mark(struct nfp_prog *nfp_prog, u8 src) 688d9ae7f2bSJakub Kicinski { 689d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, NFP_BPF_ABI_MARK, 690d9ae7f2bSJakub Kicinski reg_none(), ALU_OP_NONE, reg_b(src)); 691d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, NFP_BPF_ABI_FLAGS, 692d9ae7f2bSJakub Kicinski NFP_BPF_ABI_FLAGS, ALU_OP_OR, reg_imm(NFP_BPF_ABI_FLAG_MARK)); 693d9ae7f2bSJakub Kicinski 694d9ae7f2bSJakub Kicinski return 0; 695d9ae7f2bSJakub Kicinski } 696d9ae7f2bSJakub Kicinski 697d9ae7f2bSJakub Kicinski static void 698d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 699d9ae7f2bSJakub Kicinski { 700d9ae7f2bSJakub Kicinski u32 tmp_reg; 701d9ae7f2bSJakub Kicinski 702d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 703d9ae7f2bSJakub Kicinski if (!imm) 704d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 705d9ae7f2bSJakub Kicinski if (!imm || !~imm) 706d9ae7f2bSJakub Kicinski return; 707d9ae7f2bSJakub Kicinski } 708d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 709d9ae7f2bSJakub Kicinski if (!~imm) 710d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 711d9ae7f2bSJakub Kicinski if (!imm || !~imm) 712d9ae7f2bSJakub Kicinski return; 713d9ae7f2bSJakub Kicinski } 714d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 715d9ae7f2bSJakub Kicinski if (!~imm) 716d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 717d9ae7f2bSJakub Kicinski ALU_OP_NEG, reg_b(dst)); 718d9ae7f2bSJakub Kicinski if (!imm || !~imm) 719d9ae7f2bSJakub Kicinski return; 720d9ae7f2bSJakub Kicinski } 721d9ae7f2bSJakub Kicinski 722d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 723d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 724d9ae7f2bSJakub Kicinski } 725d9ae7f2bSJakub Kicinski 726d9ae7f2bSJakub Kicinski static int 727d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 728d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 729d9ae7f2bSJakub Kicinski { 730d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 731d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 732d9ae7f2bSJakub Kicinski 733d9ae7f2bSJakub Kicinski if (skip) { 734d9ae7f2bSJakub Kicinski meta->skip = true; 735d9ae7f2bSJakub Kicinski return 0; 736d9ae7f2bSJakub Kicinski } 737d9ae7f2bSJakub Kicinski 738d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 739d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 740d9ae7f2bSJakub Kicinski 741d9ae7f2bSJakub Kicinski return 0; 742d9ae7f2bSJakub Kicinski } 743d9ae7f2bSJakub Kicinski 744d9ae7f2bSJakub Kicinski static int 745d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 746d9ae7f2bSJakub Kicinski enum alu_op alu_op) 747d9ae7f2bSJakub Kicinski { 748d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 749d9ae7f2bSJakub Kicinski 750d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 751d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 752d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 753d9ae7f2bSJakub Kicinski 754d9ae7f2bSJakub Kicinski return 0; 755d9ae7f2bSJakub Kicinski } 756d9ae7f2bSJakub Kicinski 757d9ae7f2bSJakub Kicinski static int 758d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 759d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 760d9ae7f2bSJakub Kicinski { 761d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 762d9ae7f2bSJakub Kicinski 763d9ae7f2bSJakub Kicinski if (skip) { 764d9ae7f2bSJakub Kicinski meta->skip = true; 765d9ae7f2bSJakub Kicinski return 0; 766d9ae7f2bSJakub Kicinski } 767d9ae7f2bSJakub Kicinski 768d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 769d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 770d9ae7f2bSJakub Kicinski 771d9ae7f2bSJakub Kicinski return 0; 772d9ae7f2bSJakub Kicinski } 773d9ae7f2bSJakub Kicinski 774d9ae7f2bSJakub Kicinski static int 775d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 776d9ae7f2bSJakub Kicinski enum alu_op alu_op) 777d9ae7f2bSJakub Kicinski { 778d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 779d9ae7f2bSJakub Kicinski 780d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 781d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 782d9ae7f2bSJakub Kicinski 783d9ae7f2bSJakub Kicinski return 0; 784d9ae7f2bSJakub Kicinski } 785d9ae7f2bSJakub Kicinski 786d9ae7f2bSJakub Kicinski static void 787d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 788d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 789d9ae7f2bSJakub Kicinski { 790d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 791d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 792d9ae7f2bSJakub Kicinski } 793d9ae7f2bSJakub Kicinski 794d9ae7f2bSJakub Kicinski static int 795d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 796d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 797d9ae7f2bSJakub Kicinski { 798d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 799d9ae7f2bSJakub Kicinski 800d9ae7f2bSJakub Kicinski if (insn->off < 0) /* TODO */ 801d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 802d9ae7f2bSJakub Kicinski 803d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 804d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 805d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 806d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 807d9ae7f2bSJakub Kicinski 808d9ae7f2bSJakub Kicinski return 0; 809d9ae7f2bSJakub Kicinski } 810d9ae7f2bSJakub Kicinski 811d9ae7f2bSJakub Kicinski static int 812d9ae7f2bSJakub Kicinski wrp_cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 813d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 814d9ae7f2bSJakub Kicinski { 815d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 816d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 817d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 818d9ae7f2bSJakub Kicinski u32 tmp_reg; 819d9ae7f2bSJakub Kicinski 820d9ae7f2bSJakub Kicinski if (insn->off < 0) /* TODO */ 821d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 822d9ae7f2bSJakub Kicinski 823d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 824d9ae7f2bSJakub Kicinski if (!swap) 825d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), ALU_OP_SUB, tmp_reg); 826d9ae7f2bSJakub Kicinski else 827d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, ALU_OP_SUB, reg_a(reg)); 828d9ae7f2bSJakub Kicinski 829d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 830d9ae7f2bSJakub Kicinski if (!swap) 831d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 832d9ae7f2bSJakub Kicinski reg_a(reg + 1), ALU_OP_SUB_C, tmp_reg); 833d9ae7f2bSJakub Kicinski else 834d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 835d9ae7f2bSJakub Kicinski tmp_reg, ALU_OP_SUB_C, reg_a(reg + 1)); 836d9ae7f2bSJakub Kicinski 837d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 838d9ae7f2bSJakub Kicinski 839d9ae7f2bSJakub Kicinski return 0; 840d9ae7f2bSJakub Kicinski } 841d9ae7f2bSJakub Kicinski 842d9ae7f2bSJakub Kicinski static int 843d9ae7f2bSJakub Kicinski wrp_cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 844d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 845d9ae7f2bSJakub Kicinski { 846d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 847d9ae7f2bSJakub Kicinski u8 areg = insn->src_reg * 2, breg = insn->dst_reg * 2; 848d9ae7f2bSJakub Kicinski 849d9ae7f2bSJakub Kicinski if (insn->off < 0) /* TODO */ 850d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 851d9ae7f2bSJakub Kicinski 852d9ae7f2bSJakub Kicinski if (swap) { 853d9ae7f2bSJakub Kicinski areg ^= breg; 854d9ae7f2bSJakub Kicinski breg ^= areg; 855d9ae7f2bSJakub Kicinski areg ^= breg; 856d9ae7f2bSJakub Kicinski } 857d9ae7f2bSJakub Kicinski 858d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 859d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 860d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 861d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 862d9ae7f2bSJakub Kicinski 863d9ae7f2bSJakub Kicinski return 0; 864d9ae7f2bSJakub Kicinski } 865d9ae7f2bSJakub Kicinski 866d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 867d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 868d9ae7f2bSJakub Kicinski { 869d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 870d9ae7f2bSJakub Kicinski 871d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 872d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2 + 1, insn->src_reg * 2 + 1); 873d9ae7f2bSJakub Kicinski 874d9ae7f2bSJakub Kicinski return 0; 875d9ae7f2bSJakub Kicinski } 876d9ae7f2bSJakub Kicinski 877d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 878d9ae7f2bSJakub Kicinski { 879d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 880d9ae7f2bSJakub Kicinski 881d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 882d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 883d9ae7f2bSJakub Kicinski 884d9ae7f2bSJakub Kicinski return 0; 885d9ae7f2bSJakub Kicinski } 886d9ae7f2bSJakub Kicinski 887d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 888d9ae7f2bSJakub Kicinski { 889d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 890d9ae7f2bSJakub Kicinski } 891d9ae7f2bSJakub Kicinski 892d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 893d9ae7f2bSJakub Kicinski { 894d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 895d9ae7f2bSJakub Kicinski } 896d9ae7f2bSJakub Kicinski 897d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 898d9ae7f2bSJakub Kicinski { 899d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 900d9ae7f2bSJakub Kicinski } 901d9ae7f2bSJakub Kicinski 902d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 903d9ae7f2bSJakub Kicinski { 904d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 905d9ae7f2bSJakub Kicinski } 906d9ae7f2bSJakub Kicinski 907d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 908d9ae7f2bSJakub Kicinski { 909d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 910d9ae7f2bSJakub Kicinski } 911d9ae7f2bSJakub Kicinski 912d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 913d9ae7f2bSJakub Kicinski { 914d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 915d9ae7f2bSJakub Kicinski } 916d9ae7f2bSJakub Kicinski 917d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 918d9ae7f2bSJakub Kicinski { 919d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 920d9ae7f2bSJakub Kicinski 921d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 922d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 923d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 924d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 925d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 926d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 927d9ae7f2bSJakub Kicinski 928d9ae7f2bSJakub Kicinski return 0; 929d9ae7f2bSJakub Kicinski } 930d9ae7f2bSJakub Kicinski 931d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 932d9ae7f2bSJakub Kicinski { 933d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 934d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 935d9ae7f2bSJakub Kicinski 936d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 937d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 938d9ae7f2bSJakub Kicinski 939d9ae7f2bSJakub Kicinski return 0; 940d9ae7f2bSJakub Kicinski } 941d9ae7f2bSJakub Kicinski 942d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 943d9ae7f2bSJakub Kicinski { 944d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 945d9ae7f2bSJakub Kicinski 946d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 947d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 948d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 949d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 950d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 951d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 952d9ae7f2bSJakub Kicinski 953d9ae7f2bSJakub Kicinski return 0; 954d9ae7f2bSJakub Kicinski } 955d9ae7f2bSJakub Kicinski 956d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 957d9ae7f2bSJakub Kicinski { 958d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 959d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 960d9ae7f2bSJakub Kicinski 961d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 962d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 963d9ae7f2bSJakub Kicinski 964d9ae7f2bSJakub Kicinski return 0; 965d9ae7f2bSJakub Kicinski } 966d9ae7f2bSJakub Kicinski 967d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 968d9ae7f2bSJakub Kicinski { 969d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 970d9ae7f2bSJakub Kicinski 971d9ae7f2bSJakub Kicinski if (insn->imm != 32) 972d9ae7f2bSJakub Kicinski return 1; /* TODO */ 973d9ae7f2bSJakub Kicinski 974d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2 + 1, insn->dst_reg * 2); 975d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), 0); 976d9ae7f2bSJakub Kicinski 977d9ae7f2bSJakub Kicinski return 0; 978d9ae7f2bSJakub Kicinski } 979d9ae7f2bSJakub Kicinski 980d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 981d9ae7f2bSJakub Kicinski { 982d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 983d9ae7f2bSJakub Kicinski 984d9ae7f2bSJakub Kicinski if (insn->imm != 32) 985d9ae7f2bSJakub Kicinski return 1; /* TODO */ 986d9ae7f2bSJakub Kicinski 987d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->dst_reg * 2 + 1); 988d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 989d9ae7f2bSJakub Kicinski 990d9ae7f2bSJakub Kicinski return 0; 991d9ae7f2bSJakub Kicinski } 992d9ae7f2bSJakub Kicinski 993d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 994d9ae7f2bSJakub Kicinski { 995d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 996d9ae7f2bSJakub Kicinski 997d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 998d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 999d9ae7f2bSJakub Kicinski 1000d9ae7f2bSJakub Kicinski return 0; 1001d9ae7f2bSJakub Kicinski } 1002d9ae7f2bSJakub Kicinski 1003d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1004d9ae7f2bSJakub Kicinski { 1005d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1006d9ae7f2bSJakub Kicinski 1007d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1008d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1009d9ae7f2bSJakub Kicinski 1010d9ae7f2bSJakub Kicinski return 0; 1011d9ae7f2bSJakub Kicinski } 1012d9ae7f2bSJakub Kicinski 1013d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1014d9ae7f2bSJakub Kicinski { 1015d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1016d9ae7f2bSJakub Kicinski } 1017d9ae7f2bSJakub Kicinski 1018d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1019d9ae7f2bSJakub Kicinski { 1020d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1021d9ae7f2bSJakub Kicinski } 1022d9ae7f2bSJakub Kicinski 1023d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1024d9ae7f2bSJakub Kicinski { 1025d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1026d9ae7f2bSJakub Kicinski } 1027d9ae7f2bSJakub Kicinski 1028d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1029d9ae7f2bSJakub Kicinski { 1030d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1031d9ae7f2bSJakub Kicinski } 1032d9ae7f2bSJakub Kicinski 1033d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1034d9ae7f2bSJakub Kicinski { 1035d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1036d9ae7f2bSJakub Kicinski } 1037d9ae7f2bSJakub Kicinski 1038d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1039d9ae7f2bSJakub Kicinski { 1040d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1041d9ae7f2bSJakub Kicinski } 1042d9ae7f2bSJakub Kicinski 1043d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1044d9ae7f2bSJakub Kicinski { 1045d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1046d9ae7f2bSJakub Kicinski } 1047d9ae7f2bSJakub Kicinski 1048d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1049d9ae7f2bSJakub Kicinski { 1050d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1051d9ae7f2bSJakub Kicinski } 1052d9ae7f2bSJakub Kicinski 1053d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1054d9ae7f2bSJakub Kicinski { 1055d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1056d9ae7f2bSJakub Kicinski } 1057d9ae7f2bSJakub Kicinski 1058d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1059d9ae7f2bSJakub Kicinski { 1060d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1061d9ae7f2bSJakub Kicinski } 1062d9ae7f2bSJakub Kicinski 1063d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1064d9ae7f2bSJakub Kicinski { 1065d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1066d9ae7f2bSJakub Kicinski 1067d9ae7f2bSJakub Kicinski if (!insn->imm) 1068d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1069d9ae7f2bSJakub Kicinski 1070d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1071d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1072d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1073d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1074d9ae7f2bSJakub Kicinski 1075d9ae7f2bSJakub Kicinski return 0; 1076d9ae7f2bSJakub Kicinski } 1077d9ae7f2bSJakub Kicinski 1078d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1079d9ae7f2bSJakub Kicinski { 1080d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(nfp_meta_prev(meta)->insn.dst_reg * 2 + 1), 1081d9ae7f2bSJakub Kicinski meta->insn.imm); 1082d9ae7f2bSJakub Kicinski 1083d9ae7f2bSJakub Kicinski return 0; 1084d9ae7f2bSJakub Kicinski } 1085d9ae7f2bSJakub Kicinski 1086d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1087d9ae7f2bSJakub Kicinski { 1088d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1089d9ae7f2bSJakub Kicinski 1090d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1091d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1092d9ae7f2bSJakub Kicinski 1093d9ae7f2bSJakub Kicinski return 0; 1094d9ae7f2bSJakub Kicinski } 1095d9ae7f2bSJakub Kicinski 1096d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1097d9ae7f2bSJakub Kicinski { 1098d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1099d9ae7f2bSJakub Kicinski } 1100d9ae7f2bSJakub Kicinski 1101d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1102d9ae7f2bSJakub Kicinski { 1103d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1104d9ae7f2bSJakub Kicinski } 1105d9ae7f2bSJakub Kicinski 1106d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1107d9ae7f2bSJakub Kicinski { 1108d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1109d9ae7f2bSJakub Kicinski } 1110d9ae7f2bSJakub Kicinski 1111d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1112d9ae7f2bSJakub Kicinski { 1113d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 1114d9ae7f2bSJakub Kicinski meta->insn.src_reg * 2, true, 1); 1115d9ae7f2bSJakub Kicinski } 1116d9ae7f2bSJakub Kicinski 1117d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1118d9ae7f2bSJakub Kicinski { 1119d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 1120d9ae7f2bSJakub Kicinski meta->insn.src_reg * 2, true, 2); 1121d9ae7f2bSJakub Kicinski } 1122d9ae7f2bSJakub Kicinski 1123d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1124d9ae7f2bSJakub Kicinski { 1125d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 1126d9ae7f2bSJakub Kicinski meta->insn.src_reg * 2, true, 4); 1127d9ae7f2bSJakub Kicinski } 1128d9ae7f2bSJakub Kicinski 1129d9ae7f2bSJakub Kicinski static int mem_ldx4_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1130d9ae7f2bSJakub Kicinski { 1131d9ae7f2bSJakub Kicinski if (meta->insn.off == offsetof(struct sk_buff, len)) 1132d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(meta->insn.dst_reg * 2), 1133d9ae7f2bSJakub Kicinski reg_none(), ALU_OP_NONE, NFP_BPF_ABI_LEN); 1134d9ae7f2bSJakub Kicinski else 1135d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1136d9ae7f2bSJakub Kicinski 1137d9ae7f2bSJakub Kicinski return 0; 1138d9ae7f2bSJakub Kicinski } 1139d9ae7f2bSJakub Kicinski 1140d9ae7f2bSJakub Kicinski static int mem_ldx4_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1141d9ae7f2bSJakub Kicinski { 1142d9ae7f2bSJakub Kicinski u32 dst = reg_both(meta->insn.dst_reg * 2); 1143d9ae7f2bSJakub Kicinski 1144d9ae7f2bSJakub Kicinski if (meta->insn.off != offsetof(struct xdp_md, data) && 1145d9ae7f2bSJakub Kicinski meta->insn.off != offsetof(struct xdp_md, data_end)) 1146d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1147d9ae7f2bSJakub Kicinski 1148d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, NFP_BPF_ABI_PKT); 1149d9ae7f2bSJakub Kicinski 1150d9ae7f2bSJakub Kicinski if (meta->insn.off == offsetof(struct xdp_md, data)) 1151d9ae7f2bSJakub Kicinski return 0; 1152d9ae7f2bSJakub Kicinski 1153d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, dst, dst, ALU_OP_ADD, NFP_BPF_ABI_LEN); 1154d9ae7f2bSJakub Kicinski 1155d9ae7f2bSJakub Kicinski return 0; 1156d9ae7f2bSJakub Kicinski } 1157d9ae7f2bSJakub Kicinski 1158d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1159d9ae7f2bSJakub Kicinski { 1160d9ae7f2bSJakub Kicinski int ret; 1161d9ae7f2bSJakub Kicinski 1162d9ae7f2bSJakub Kicinski if (nfp_prog->act == NN_ACT_XDP) 1163d9ae7f2bSJakub Kicinski ret = mem_ldx4_xdp(nfp_prog, meta); 1164d9ae7f2bSJakub Kicinski else 1165d9ae7f2bSJakub Kicinski ret = mem_ldx4_skb(nfp_prog, meta); 1166d9ae7f2bSJakub Kicinski 1167d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1168d9ae7f2bSJakub Kicinski 1169d9ae7f2bSJakub Kicinski return ret; 1170d9ae7f2bSJakub Kicinski } 1171d9ae7f2bSJakub Kicinski 1172d9ae7f2bSJakub Kicinski static int mem_stx4_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1173d9ae7f2bSJakub Kicinski { 1174d9ae7f2bSJakub Kicinski if (meta->insn.off == offsetof(struct sk_buff, mark)) 1175d9ae7f2bSJakub Kicinski return wrp_set_mark(nfp_prog, meta->insn.src_reg * 2); 1176d9ae7f2bSJakub Kicinski 1177d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1178d9ae7f2bSJakub Kicinski } 1179d9ae7f2bSJakub Kicinski 1180d9ae7f2bSJakub Kicinski static int mem_stx4_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1181d9ae7f2bSJakub Kicinski { 1182d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1183d9ae7f2bSJakub Kicinski } 1184d9ae7f2bSJakub Kicinski 1185d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1186d9ae7f2bSJakub Kicinski { 1187d9ae7f2bSJakub Kicinski if (nfp_prog->act == NN_ACT_XDP) 1188d9ae7f2bSJakub Kicinski return mem_stx4_xdp(nfp_prog, meta); 1189d9ae7f2bSJakub Kicinski return mem_stx4_skb(nfp_prog, meta); 1190d9ae7f2bSJakub Kicinski } 1191d9ae7f2bSJakub Kicinski 1192d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1193d9ae7f2bSJakub Kicinski { 1194d9ae7f2bSJakub Kicinski if (meta->insn.off < 0) /* TODO */ 1195d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1196d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 1197d9ae7f2bSJakub Kicinski 1198d9ae7f2bSJakub Kicinski return 0; 1199d9ae7f2bSJakub Kicinski } 1200d9ae7f2bSJakub Kicinski 1201d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1202d9ae7f2bSJakub Kicinski { 1203d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1204d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1205d9ae7f2bSJakub Kicinski u32 or1 = reg_a(insn->dst_reg * 2), or2 = reg_b(insn->dst_reg * 2 + 1); 1206d9ae7f2bSJakub Kicinski u32 tmp_reg; 1207d9ae7f2bSJakub Kicinski 1208d9ae7f2bSJakub Kicinski if (insn->off < 0) /* TODO */ 1209d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1210d9ae7f2bSJakub Kicinski 1211d9ae7f2bSJakub Kicinski if (imm & ~0U) { 1212d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1213d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 1214d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 1215d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 1216d9ae7f2bSJakub Kicinski } 1217d9ae7f2bSJakub Kicinski 1218d9ae7f2bSJakub Kicinski if (imm >> 32) { 1219d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1220d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1221d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 1222d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 1223d9ae7f2bSJakub Kicinski } 1224d9ae7f2bSJakub Kicinski 1225d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 1226d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 1227d9ae7f2bSJakub Kicinski 1228d9ae7f2bSJakub Kicinski return 0; 1229d9ae7f2bSJakub Kicinski } 1230d9ae7f2bSJakub Kicinski 1231d9ae7f2bSJakub Kicinski static int jgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1232d9ae7f2bSJakub Kicinski { 1233d9ae7f2bSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, false); 1234d9ae7f2bSJakub Kicinski } 1235d9ae7f2bSJakub Kicinski 1236d9ae7f2bSJakub Kicinski static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1237d9ae7f2bSJakub Kicinski { 1238d9ae7f2bSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); 1239d9ae7f2bSJakub Kicinski } 1240d9ae7f2bSJakub Kicinski 12415dd294d4SDaniel Borkmann static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12425dd294d4SDaniel Borkmann { 12435dd294d4SDaniel Borkmann return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false); 12445dd294d4SDaniel Borkmann } 12455dd294d4SDaniel Borkmann 12465dd294d4SDaniel Borkmann static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12475dd294d4SDaniel Borkmann { 12485dd294d4SDaniel Borkmann return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true); 12495dd294d4SDaniel Borkmann } 12505dd294d4SDaniel Borkmann 1251d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1252d9ae7f2bSJakub Kicinski { 1253d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1254d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1255d9ae7f2bSJakub Kicinski u32 tmp_reg; 1256d9ae7f2bSJakub Kicinski 1257d9ae7f2bSJakub Kicinski if (insn->off < 0) /* TODO */ 1258d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1259d9ae7f2bSJakub Kicinski 1260d9ae7f2bSJakub Kicinski if (!imm) { 1261d9ae7f2bSJakub Kicinski meta->skip = true; 1262d9ae7f2bSJakub Kicinski return 0; 1263d9ae7f2bSJakub Kicinski } 1264d9ae7f2bSJakub Kicinski 1265d9ae7f2bSJakub Kicinski if (imm & ~0U) { 1266d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1267d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1268d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 1269d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 1270d9ae7f2bSJakub Kicinski } 1271d9ae7f2bSJakub Kicinski 1272d9ae7f2bSJakub Kicinski if (imm >> 32) { 1273d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1274d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1275d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 1276d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 1277d9ae7f2bSJakub Kicinski } 1278d9ae7f2bSJakub Kicinski 1279d9ae7f2bSJakub Kicinski return 0; 1280d9ae7f2bSJakub Kicinski } 1281d9ae7f2bSJakub Kicinski 1282d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1283d9ae7f2bSJakub Kicinski { 1284d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1285d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1286d9ae7f2bSJakub Kicinski u32 tmp_reg; 1287d9ae7f2bSJakub Kicinski 1288d9ae7f2bSJakub Kicinski if (insn->off < 0) /* TODO */ 1289d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1290d9ae7f2bSJakub Kicinski 1291d9ae7f2bSJakub Kicinski if (!imm) { 1292d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 1293d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 1294d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 1295d9ae7f2bSJakub Kicinski } 1296d9ae7f2bSJakub Kicinski 1297d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1298d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1299d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 1300d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 1301d9ae7f2bSJakub Kicinski 1302d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1303d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1304d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 1305d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 1306d9ae7f2bSJakub Kicinski 1307d9ae7f2bSJakub Kicinski return 0; 1308d9ae7f2bSJakub Kicinski } 1309d9ae7f2bSJakub Kicinski 1310d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1311d9ae7f2bSJakub Kicinski { 1312d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1313d9ae7f2bSJakub Kicinski 1314d9ae7f2bSJakub Kicinski if (insn->off < 0) /* TODO */ 1315d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1316d9ae7f2bSJakub Kicinski 1317d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 1318d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 1319d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 1320d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 1321d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1322d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 1323d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 1324d9ae7f2bSJakub Kicinski 1325d9ae7f2bSJakub Kicinski return 0; 1326d9ae7f2bSJakub Kicinski } 1327d9ae7f2bSJakub Kicinski 1328d9ae7f2bSJakub Kicinski static int jgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1329d9ae7f2bSJakub Kicinski { 1330d9ae7f2bSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, false); 1331d9ae7f2bSJakub Kicinski } 1332d9ae7f2bSJakub Kicinski 1333d9ae7f2bSJakub Kicinski static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1334d9ae7f2bSJakub Kicinski { 1335d9ae7f2bSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); 1336d9ae7f2bSJakub Kicinski } 1337d9ae7f2bSJakub Kicinski 13385dd294d4SDaniel Borkmann static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 13395dd294d4SDaniel Borkmann { 13405dd294d4SDaniel Borkmann return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false); 13415dd294d4SDaniel Borkmann } 13425dd294d4SDaniel Borkmann 13435dd294d4SDaniel Borkmann static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 13445dd294d4SDaniel Borkmann { 13455dd294d4SDaniel Borkmann return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true); 13465dd294d4SDaniel Borkmann } 13475dd294d4SDaniel Borkmann 1348d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1349d9ae7f2bSJakub Kicinski { 1350d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 1351d9ae7f2bSJakub Kicinski } 1352d9ae7f2bSJakub Kicinski 1353d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1354d9ae7f2bSJakub Kicinski { 1355d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 1356d9ae7f2bSJakub Kicinski } 1357d9ae7f2bSJakub Kicinski 1358d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1359d9ae7f2bSJakub Kicinski { 1360d9ae7f2bSJakub Kicinski wrp_br_special(nfp_prog, BR_UNC, OP_BR_GO_OUT); 1361d9ae7f2bSJakub Kicinski 1362d9ae7f2bSJakub Kicinski return 0; 1363d9ae7f2bSJakub Kicinski } 1364d9ae7f2bSJakub Kicinski 1365d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 1366d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 1367d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 1368d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 1369d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 1370d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 1371d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 1372d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 1373d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 1374d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 1375d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 1376d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 1377d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 1378d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 1379d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 1380d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 1381d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 1382d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 1383d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 1384d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 1385d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 1386d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 1387d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 1388d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 1389d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 1390d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 1391d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 1392d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 1393d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 1394d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 1395d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 1396d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 1397d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 1398d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 1399d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 1400d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 1401d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 1402d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 1403d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 1404d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = jgt_imm, 1405d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, 14065dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, 14075dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, 1408d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 1409d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 1410d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 1411d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = jgt_reg, 1412d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, 14135dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, 14145dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, 1415d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 1416d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 1417d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 1418d9ae7f2bSJakub Kicinski }; 1419d9ae7f2bSJakub Kicinski 1420d9ae7f2bSJakub Kicinski /* --- Misc code --- */ 1421d9ae7f2bSJakub Kicinski static void br_set_offset(u64 *instr, u16 offset) 1422d9ae7f2bSJakub Kicinski { 1423d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 1424d9ae7f2bSJakub Kicinski 1425d9ae7f2bSJakub Kicinski addr_lo = offset & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 1426d9ae7f2bSJakub Kicinski addr_hi = offset != addr_lo; 1427d9ae7f2bSJakub Kicinski *instr &= ~(OP_BR_ADDR_HI | OP_BR_ADDR_LO); 1428d9ae7f2bSJakub Kicinski *instr |= FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 1429d9ae7f2bSJakub Kicinski *instr |= FIELD_PREP(OP_BR_ADDR_LO, addr_lo); 1430d9ae7f2bSJakub Kicinski } 1431d9ae7f2bSJakub Kicinski 1432d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 1433d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 1434d9ae7f2bSJakub Kicinski { 1435d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta, *next; 1436d9ae7f2bSJakub Kicinski u32 off, br_idx; 1437d9ae7f2bSJakub Kicinski u32 idx; 1438d9ae7f2bSJakub Kicinski 1439d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta, next) { 1440d9ae7f2bSJakub Kicinski if (meta->skip) 1441d9ae7f2bSJakub Kicinski continue; 1442d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 1443d9ae7f2bSJakub Kicinski continue; 1444d9ae7f2bSJakub Kicinski 1445d9ae7f2bSJakub Kicinski br_idx = nfp_prog_offset_to_index(nfp_prog, next->off) - 1; 1446d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 1447d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 1448d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 1449d9ae7f2bSJakub Kicinski return -ELOOP; 1450d9ae7f2bSJakub Kicinski } 1451d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 1452d9ae7f2bSJakub Kicinski if (FIELD_GET(OP_BR_SPECIAL, nfp_prog->prog[br_idx])) 1453d9ae7f2bSJakub Kicinski continue; 1454d9ae7f2bSJakub Kicinski 1455d9ae7f2bSJakub Kicinski /* Find the target offset in assembler realm */ 1456d9ae7f2bSJakub Kicinski off = meta->insn.off; 1457d9ae7f2bSJakub Kicinski if (!off) { 1458d9ae7f2bSJakub Kicinski pr_err("Fixup found zero offset!!\n"); 1459d9ae7f2bSJakub Kicinski return -ELOOP; 1460d9ae7f2bSJakub Kicinski } 1461d9ae7f2bSJakub Kicinski 1462d9ae7f2bSJakub Kicinski while (off && nfp_meta_has_next(nfp_prog, next)) { 1463d9ae7f2bSJakub Kicinski next = nfp_meta_next(next); 1464d9ae7f2bSJakub Kicinski off--; 1465d9ae7f2bSJakub Kicinski } 1466d9ae7f2bSJakub Kicinski if (off) { 1467d9ae7f2bSJakub Kicinski pr_err("Fixup found too large jump!! %d\n", off); 1468d9ae7f2bSJakub Kicinski return -ELOOP; 1469d9ae7f2bSJakub Kicinski } 1470d9ae7f2bSJakub Kicinski 1471d9ae7f2bSJakub Kicinski if (next->skip) { 1472d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 1473d9ae7f2bSJakub Kicinski return -ELOOP; 1474d9ae7f2bSJakub Kicinski } 1475d9ae7f2bSJakub Kicinski 1476d9ae7f2bSJakub Kicinski for (idx = nfp_prog_offset_to_index(nfp_prog, meta->off); 1477d9ae7f2bSJakub Kicinski idx <= br_idx; idx++) { 1478d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 1479d9ae7f2bSJakub Kicinski continue; 1480d9ae7f2bSJakub Kicinski br_set_offset(&nfp_prog->prog[idx], next->off); 1481d9ae7f2bSJakub Kicinski } 1482d9ae7f2bSJakub Kicinski } 1483d9ae7f2bSJakub Kicinski 1484d9ae7f2bSJakub Kicinski /* Fixup 'goto out's separately, they can be scattered around */ 1485d9ae7f2bSJakub Kicinski for (br_idx = 0; br_idx < nfp_prog->prog_len; br_idx++) { 1486d9ae7f2bSJakub Kicinski enum br_special special; 1487d9ae7f2bSJakub Kicinski 1488d9ae7f2bSJakub Kicinski if ((nfp_prog->prog[br_idx] & OP_BR_BASE_MASK) != OP_BR_BASE) 1489d9ae7f2bSJakub Kicinski continue; 1490d9ae7f2bSJakub Kicinski 1491d9ae7f2bSJakub Kicinski special = FIELD_GET(OP_BR_SPECIAL, nfp_prog->prog[br_idx]); 1492d9ae7f2bSJakub Kicinski switch (special) { 1493d9ae7f2bSJakub Kicinski case OP_BR_NORMAL: 1494d9ae7f2bSJakub Kicinski break; 1495d9ae7f2bSJakub Kicinski case OP_BR_GO_OUT: 1496d9ae7f2bSJakub Kicinski br_set_offset(&nfp_prog->prog[br_idx], 1497d9ae7f2bSJakub Kicinski nfp_prog->tgt_out); 1498d9ae7f2bSJakub Kicinski break; 1499d9ae7f2bSJakub Kicinski case OP_BR_GO_ABORT: 1500d9ae7f2bSJakub Kicinski br_set_offset(&nfp_prog->prog[br_idx], 1501d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort); 1502d9ae7f2bSJakub Kicinski break; 1503d9ae7f2bSJakub Kicinski } 1504d9ae7f2bSJakub Kicinski 1505d9ae7f2bSJakub Kicinski nfp_prog->prog[br_idx] &= ~OP_BR_SPECIAL; 1506d9ae7f2bSJakub Kicinski } 1507d9ae7f2bSJakub Kicinski 1508d9ae7f2bSJakub Kicinski return 0; 1509d9ae7f2bSJakub Kicinski } 1510d9ae7f2bSJakub Kicinski 1511d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 1512d9ae7f2bSJakub Kicinski { 1513d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, pkt_reg(nfp_prog), 1514d9ae7f2bSJakub Kicinski reg_none(), ALU_OP_NONE, NFP_BPF_ABI_PKT); 1515d9ae7f2bSJakub Kicinski } 1516d9ae7f2bSJakub Kicinski 1517d9ae7f2bSJakub Kicinski static void nfp_outro_tc_legacy(struct nfp_prog *nfp_prog) 1518d9ae7f2bSJakub Kicinski { 1519d9ae7f2bSJakub Kicinski const u8 act2code[] = { 1520d9ae7f2bSJakub Kicinski [NN_ACT_TC_DROP] = 0x22, 1521d9ae7f2bSJakub Kicinski [NN_ACT_TC_REDIR] = 0x24 1522d9ae7f2bSJakub Kicinski }; 1523d9ae7f2bSJakub Kicinski /* Target for aborts */ 1524d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 1525d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 1526d9ae7f2bSJakub Kicinski 1527d9ae7f2bSJakub Kicinski /* Target for normal exits */ 1528d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 1529d9ae7f2bSJakub Kicinski /* Legacy TC mode: 1530d9ae7f2bSJakub Kicinski * 0 0x11 -> pass, count as stat0 1531d9ae7f2bSJakub Kicinski * -1 drop 0x22 -> drop, count as stat1 1532d9ae7f2bSJakub Kicinski * redir 0x24 -> redir, count as stat1 1533d9ae7f2bSJakub Kicinski * ife mark 0x21 -> pass, count as stat1 1534d9ae7f2bSJakub Kicinski * ife + tx 0x24 -> redir, count as stat1 1535d9ae7f2bSJakub Kicinski */ 1536d9ae7f2bSJakub Kicinski emit_br_byte_neq(nfp_prog, reg_b(0), 0xff, 0, nfp_prog->tgt_done, 2); 1537d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_a(0), 1538d9ae7f2bSJakub Kicinski reg_none(), ALU_OP_NONE, NFP_BPF_ABI_FLAGS); 1539d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 1540d9ae7f2bSJakub Kicinski 1541d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, nfp_prog->tgt_done, 1); 1542d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(act2code[nfp_prog->act]), 1543d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, 16); 1544d9ae7f2bSJakub Kicinski } 1545d9ae7f2bSJakub Kicinski 1546d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 1547d9ae7f2bSJakub Kicinski { 1548d9ae7f2bSJakub Kicinski /* TC direct-action mode: 1549d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 1550d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 1551d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 1552d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 1553d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 1554d9ae7f2bSJakub Kicinski * 1555d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 1556d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 1557d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 1558d9ae7f2bSJakub Kicinski * packets up the stack. 1559d9ae7f2bSJakub Kicinski */ 1560d9ae7f2bSJakub Kicinski /* Target for aborts */ 1561d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 1562d9ae7f2bSJakub Kicinski 1563d9ae7f2bSJakub Kicinski emit_br_def(nfp_prog, nfp_prog->tgt_done, 2); 1564d9ae7f2bSJakub Kicinski 1565d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_a(0), 1566d9ae7f2bSJakub Kicinski reg_none(), ALU_OP_NONE, NFP_BPF_ABI_FLAGS); 1567d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 1568d9ae7f2bSJakub Kicinski 1569d9ae7f2bSJakub Kicinski /* Target for normal exits */ 1570d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 1571d9ae7f2bSJakub Kicinski 1572d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 1573d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 1574d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 1575d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_a(0), 1576d9ae7f2bSJakub Kicinski reg_none(), ALU_OP_NONE, NFP_BPF_ABI_FLAGS); 1577d9ae7f2bSJakub Kicinski 1578d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 1579d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 1580d9ae7f2bSJakub Kicinski 1581d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 1582d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 1583d9ae7f2bSJakub Kicinski 1584d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 1585d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 1586d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 1587d9ae7f2bSJakub Kicinski 1588d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 1589d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 1590d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 1591d9ae7f2bSJakub Kicinski 1592d9ae7f2bSJakub Kicinski emit_br_def(nfp_prog, nfp_prog->tgt_done, 2); 1593d9ae7f2bSJakub Kicinski 1594d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 1595d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 1596d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 1597d9ae7f2bSJakub Kicinski } 1598d9ae7f2bSJakub Kicinski 1599d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 1600d9ae7f2bSJakub Kicinski { 1601d9ae7f2bSJakub Kicinski /* XDP return codes: 1602d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 1603d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 1604d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 1605d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 1606d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 1607d9ae7f2bSJakub Kicinski */ 1608d9ae7f2bSJakub Kicinski /* Target for aborts */ 1609d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 1610d9ae7f2bSJakub Kicinski 1611d9ae7f2bSJakub Kicinski emit_br_def(nfp_prog, nfp_prog->tgt_done, 2); 1612d9ae7f2bSJakub Kicinski 1613d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_a(0), 1614d9ae7f2bSJakub Kicinski reg_none(), ALU_OP_NONE, NFP_BPF_ABI_FLAGS); 1615d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 1616d9ae7f2bSJakub Kicinski 1617d9ae7f2bSJakub Kicinski /* Target for normal exits */ 1618d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 1619d9ae7f2bSJakub Kicinski 1620d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 1621d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 1622d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 1623d9ae7f2bSJakub Kicinski 1624d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 1625d9ae7f2bSJakub Kicinski 1626d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 1627d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 1628d9ae7f2bSJakub Kicinski 1629d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 1630d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 1631d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 1632d9ae7f2bSJakub Kicinski 1633d9ae7f2bSJakub Kicinski emit_br_def(nfp_prog, nfp_prog->tgt_done, 2); 1634d9ae7f2bSJakub Kicinski 1635d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_a(0), 1636d9ae7f2bSJakub Kicinski reg_none(), ALU_OP_NONE, NFP_BPF_ABI_FLAGS); 1637d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 1638d9ae7f2bSJakub Kicinski } 1639d9ae7f2bSJakub Kicinski 1640d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 1641d9ae7f2bSJakub Kicinski { 1642d9ae7f2bSJakub Kicinski switch (nfp_prog->act) { 1643d9ae7f2bSJakub Kicinski case NN_ACT_DIRECT: 1644d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 1645d9ae7f2bSJakub Kicinski break; 1646d9ae7f2bSJakub Kicinski case NN_ACT_TC_DROP: 1647d9ae7f2bSJakub Kicinski case NN_ACT_TC_REDIR: 1648d9ae7f2bSJakub Kicinski nfp_outro_tc_legacy(nfp_prog); 1649d9ae7f2bSJakub Kicinski break; 1650d9ae7f2bSJakub Kicinski case NN_ACT_XDP: 1651d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 1652d9ae7f2bSJakub Kicinski break; 1653d9ae7f2bSJakub Kicinski } 1654d9ae7f2bSJakub Kicinski } 1655d9ae7f2bSJakub Kicinski 1656d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 1657d9ae7f2bSJakub Kicinski { 1658d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 1659d9ae7f2bSJakub Kicinski int err; 1660d9ae7f2bSJakub Kicinski 1661d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 1662d9ae7f2bSJakub Kicinski if (nfp_prog->error) 1663d9ae7f2bSJakub Kicinski return nfp_prog->error; 1664d9ae7f2bSJakub Kicinski 1665d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 1666d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 1667d9ae7f2bSJakub Kicinski 1668d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 1669d9ae7f2bSJakub Kicinski 1670d9ae7f2bSJakub Kicinski if (meta->skip) { 1671d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 1672d9ae7f2bSJakub Kicinski continue; 1673d9ae7f2bSJakub Kicinski } 1674d9ae7f2bSJakub Kicinski 1675d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 1676d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 1677d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 1678d9ae7f2bSJakub Kicinski if (!cb) 1679d9ae7f2bSJakub Kicinski return -ENOENT; 1680d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 1681d9ae7f2bSJakub Kicinski if (err) 1682d9ae7f2bSJakub Kicinski return err; 1683d9ae7f2bSJakub Kicinski 1684d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 1685d9ae7f2bSJakub Kicinski } 1686d9ae7f2bSJakub Kicinski 1687d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 1688d9ae7f2bSJakub Kicinski if (nfp_prog->error) 1689d9ae7f2bSJakub Kicinski return nfp_prog->error; 1690d9ae7f2bSJakub Kicinski 1691d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 1692d9ae7f2bSJakub Kicinski } 1693d9ae7f2bSJakub Kicinski 1694d9ae7f2bSJakub Kicinski static int 1695d9ae7f2bSJakub Kicinski nfp_prog_prepare(struct nfp_prog *nfp_prog, const struct bpf_insn *prog, 1696d9ae7f2bSJakub Kicinski unsigned int cnt) 1697d9ae7f2bSJakub Kicinski { 1698d9ae7f2bSJakub Kicinski unsigned int i; 1699d9ae7f2bSJakub Kicinski 1700d9ae7f2bSJakub Kicinski for (i = 0; i < cnt; i++) { 1701d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 1702d9ae7f2bSJakub Kicinski 1703d9ae7f2bSJakub Kicinski meta = kzalloc(sizeof(*meta), GFP_KERNEL); 1704d9ae7f2bSJakub Kicinski if (!meta) 1705d9ae7f2bSJakub Kicinski return -ENOMEM; 1706d9ae7f2bSJakub Kicinski 1707d9ae7f2bSJakub Kicinski meta->insn = prog[i]; 1708d9ae7f2bSJakub Kicinski meta->n = i; 1709d9ae7f2bSJakub Kicinski 1710d9ae7f2bSJakub Kicinski list_add_tail(&meta->l, &nfp_prog->insns); 1711d9ae7f2bSJakub Kicinski } 1712d9ae7f2bSJakub Kicinski 1713d9ae7f2bSJakub Kicinski return 0; 1714d9ae7f2bSJakub Kicinski } 1715d9ae7f2bSJakub Kicinski 1716d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 1717d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 1718d9ae7f2bSJakub Kicinski { 1719d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 1720d9ae7f2bSJakub Kicinski 1721d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 1722d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 1723d9ae7f2bSJakub Kicinski 1724d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 1725d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 1726d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 1727d9ae7f2bSJakub Kicinski continue; 1728d9ae7f2bSJakub Kicinski 1729d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 1730d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 1731d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 1732d9ae7f2bSJakub Kicinski meta->skip = true; 1733d9ae7f2bSJakub Kicinski 1734d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 1735d9ae7f2bSJakub Kicinski if (!meta->skip) 1736d9ae7f2bSJakub Kicinski return; 1737d9ae7f2bSJakub Kicinski } 1738d9ae7f2bSJakub Kicinski } 1739d9ae7f2bSJakub Kicinski 1740d9ae7f2bSJakub Kicinski /* Try to rename registers so that program uses only low ones */ 1741d9ae7f2bSJakub Kicinski static int nfp_bpf_opt_reg_rename(struct nfp_prog *nfp_prog) 1742d9ae7f2bSJakub Kicinski { 1743d9ae7f2bSJakub Kicinski bool reg_used[MAX_BPF_REG] = {}; 1744d9ae7f2bSJakub Kicinski u8 tgt_reg[MAX_BPF_REG] = {}; 1745d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 1746d9ae7f2bSJakub Kicinski unsigned int i, j; 1747d9ae7f2bSJakub Kicinski 1748d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 1749d9ae7f2bSJakub Kicinski if (meta->skip) 1750d9ae7f2bSJakub Kicinski continue; 1751d9ae7f2bSJakub Kicinski 1752d9ae7f2bSJakub Kicinski reg_used[meta->insn.src_reg] = true; 1753d9ae7f2bSJakub Kicinski reg_used[meta->insn.dst_reg] = true; 1754d9ae7f2bSJakub Kicinski } 1755d9ae7f2bSJakub Kicinski 1756d9ae7f2bSJakub Kicinski for (i = 0, j = 0; i < ARRAY_SIZE(tgt_reg); i++) { 1757d9ae7f2bSJakub Kicinski if (!reg_used[i]) 1758d9ae7f2bSJakub Kicinski continue; 1759d9ae7f2bSJakub Kicinski 1760d9ae7f2bSJakub Kicinski tgt_reg[i] = j++; 1761d9ae7f2bSJakub Kicinski } 1762d9ae7f2bSJakub Kicinski nfp_prog->num_regs = j; 1763d9ae7f2bSJakub Kicinski 1764d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 1765d9ae7f2bSJakub Kicinski meta->insn.src_reg = tgt_reg[meta->insn.src_reg]; 1766d9ae7f2bSJakub Kicinski meta->insn.dst_reg = tgt_reg[meta->insn.dst_reg]; 1767d9ae7f2bSJakub Kicinski } 1768d9ae7f2bSJakub Kicinski 1769d9ae7f2bSJakub Kicinski return 0; 1770d9ae7f2bSJakub Kicinski } 1771d9ae7f2bSJakub Kicinski 1772d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 1773d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 1774d9ae7f2bSJakub Kicinski { 1775d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 1776d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 1777d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 1778d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 1779d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 1780d9ae7f2bSJakub Kicinski }; 1781d9ae7f2bSJakub Kicinski 1782d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 1783d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 1784d9ae7f2bSJakub Kicinski 1785d9ae7f2bSJakub Kicinski insn = meta1->insn; 1786d9ae7f2bSJakub Kicinski next = meta2->insn; 1787d9ae7f2bSJakub Kicinski 1788d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 1789d9ae7f2bSJakub Kicinski continue; 1790d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 1791d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 1792d9ae7f2bSJakub Kicinski continue; 1793d9ae7f2bSJakub Kicinski 1794d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 1795d9ae7f2bSJakub Kicinski continue; 1796d9ae7f2bSJakub Kicinski 1797d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 1798d9ae7f2bSJakub Kicinski continue; 1799d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 1800d9ae7f2bSJakub Kicinski continue; 1801d9ae7f2bSJakub Kicinski 1802d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 1803d9ae7f2bSJakub Kicinski continue; 1804d9ae7f2bSJakub Kicinski 1805d9ae7f2bSJakub Kicinski meta2->skip = true; 1806d9ae7f2bSJakub Kicinski } 1807d9ae7f2bSJakub Kicinski } 1808d9ae7f2bSJakub Kicinski 1809d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 1810d9ae7f2bSJakub Kicinski { 1811d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 1812d9ae7f2bSJakub Kicinski 1813d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 1814d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 1815d9ae7f2bSJakub Kicinski 1816d9ae7f2bSJakub Kicinski insn = meta1->insn; 1817d9ae7f2bSJakub Kicinski next1 = meta2->insn; 1818d9ae7f2bSJakub Kicinski next2 = meta3->insn; 1819d9ae7f2bSJakub Kicinski 1820d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 1821d9ae7f2bSJakub Kicinski continue; 1822d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 1823d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 1824d9ae7f2bSJakub Kicinski continue; 1825d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 1826d9ae7f2bSJakub Kicinski continue; 1827d9ae7f2bSJakub Kicinski 1828d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 1829d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 1830d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 1831d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 1832d9ae7f2bSJakub Kicinski continue; 1833d9ae7f2bSJakub Kicinski 1834d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 1835d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 1836d9ae7f2bSJakub Kicinski continue; 1837d9ae7f2bSJakub Kicinski 1838d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 1839d9ae7f2bSJakub Kicinski continue; 1840d9ae7f2bSJakub Kicinski 1841d9ae7f2bSJakub Kicinski meta2->skip = true; 1842d9ae7f2bSJakub Kicinski meta3->skip = true; 1843d9ae7f2bSJakub Kicinski } 1844d9ae7f2bSJakub Kicinski } 1845d9ae7f2bSJakub Kicinski 1846d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 1847d9ae7f2bSJakub Kicinski { 1848d9ae7f2bSJakub Kicinski int ret; 1849d9ae7f2bSJakub Kicinski 1850d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 1851d9ae7f2bSJakub Kicinski 1852d9ae7f2bSJakub Kicinski ret = nfp_bpf_opt_reg_rename(nfp_prog); 1853d9ae7f2bSJakub Kicinski if (ret) 1854d9ae7f2bSJakub Kicinski return ret; 1855d9ae7f2bSJakub Kicinski 1856d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 1857d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 1858d9ae7f2bSJakub Kicinski 1859d9ae7f2bSJakub Kicinski return 0; 1860d9ae7f2bSJakub Kicinski } 1861d9ae7f2bSJakub Kicinski 1862d9ae7f2bSJakub Kicinski /** 1863d9ae7f2bSJakub Kicinski * nfp_bpf_jit() - translate BPF code into NFP assembly 1864d9ae7f2bSJakub Kicinski * @filter: kernel BPF filter struct 1865d9ae7f2bSJakub Kicinski * @prog_mem: memory to store assembler instructions 1866d9ae7f2bSJakub Kicinski * @act: action attached to this eBPF program 1867d9ae7f2bSJakub Kicinski * @prog_start: offset of the first instruction when loaded 1868d9ae7f2bSJakub Kicinski * @prog_done: where to jump on exit 1869d9ae7f2bSJakub Kicinski * @prog_sz: size of @prog_mem in instructions 1870d9ae7f2bSJakub Kicinski * @res: achieved parameters of translation results 1871d9ae7f2bSJakub Kicinski */ 1872d9ae7f2bSJakub Kicinski int 1873d9ae7f2bSJakub Kicinski nfp_bpf_jit(struct bpf_prog *filter, void *prog_mem, 1874d9ae7f2bSJakub Kicinski enum nfp_bpf_action_type act, 1875d9ae7f2bSJakub Kicinski unsigned int prog_start, unsigned int prog_done, 1876d9ae7f2bSJakub Kicinski unsigned int prog_sz, struct nfp_bpf_result *res) 1877d9ae7f2bSJakub Kicinski { 1878d9ae7f2bSJakub Kicinski struct nfp_prog *nfp_prog; 1879d9ae7f2bSJakub Kicinski int ret; 1880d9ae7f2bSJakub Kicinski 1881d9ae7f2bSJakub Kicinski nfp_prog = kzalloc(sizeof(*nfp_prog), GFP_KERNEL); 1882d9ae7f2bSJakub Kicinski if (!nfp_prog) 1883d9ae7f2bSJakub Kicinski return -ENOMEM; 1884d9ae7f2bSJakub Kicinski 1885d9ae7f2bSJakub Kicinski INIT_LIST_HEAD(&nfp_prog->insns); 1886d9ae7f2bSJakub Kicinski nfp_prog->act = act; 1887d9ae7f2bSJakub Kicinski nfp_prog->start_off = prog_start; 1888d9ae7f2bSJakub Kicinski nfp_prog->tgt_done = prog_done; 1889d9ae7f2bSJakub Kicinski 1890d9ae7f2bSJakub Kicinski ret = nfp_prog_prepare(nfp_prog, filter->insnsi, filter->len); 1891d9ae7f2bSJakub Kicinski if (ret) 1892d9ae7f2bSJakub Kicinski goto out; 1893d9ae7f2bSJakub Kicinski 1894d9ae7f2bSJakub Kicinski ret = nfp_prog_verify(nfp_prog, filter); 1895d9ae7f2bSJakub Kicinski if (ret) 1896d9ae7f2bSJakub Kicinski goto out; 1897d9ae7f2bSJakub Kicinski 1898d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 1899d9ae7f2bSJakub Kicinski if (ret) 1900d9ae7f2bSJakub Kicinski goto out; 1901d9ae7f2bSJakub Kicinski 1902d9ae7f2bSJakub Kicinski if (nfp_prog->num_regs <= 7) 1903d9ae7f2bSJakub Kicinski nfp_prog->regs_per_thread = 16; 1904d9ae7f2bSJakub Kicinski else 1905d9ae7f2bSJakub Kicinski nfp_prog->regs_per_thread = 32; 1906d9ae7f2bSJakub Kicinski 1907d9ae7f2bSJakub Kicinski nfp_prog->prog = prog_mem; 1908d9ae7f2bSJakub Kicinski nfp_prog->__prog_alloc_len = prog_sz; 1909d9ae7f2bSJakub Kicinski 1910d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 1911d9ae7f2bSJakub Kicinski if (ret) { 1912d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 1913d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 1914d9ae7f2bSJakub Kicinski ret = -EINVAL; 1915d9ae7f2bSJakub Kicinski } 1916d9ae7f2bSJakub Kicinski 1917d9ae7f2bSJakub Kicinski res->n_instr = nfp_prog->prog_len; 1918d9ae7f2bSJakub Kicinski res->dense_mode = nfp_prog->num_regs <= 7; 1919d9ae7f2bSJakub Kicinski out: 1920d9ae7f2bSJakub Kicinski nfp_prog_free(nfp_prog); 1921d9ae7f2bSJakub Kicinski 1922d9ae7f2bSJakub Kicinski return ret; 1923d9ae7f2bSJakub Kicinski } 1924