1d9ae7f2bSJakub Kicinski /* 2854dc87dSJiong Wang * Copyright (C) 2016-2017 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 360d49eaf4SJakub Kicinski #include <linux/bug.h> 37d9ae7f2bSJakub Kicinski #include <linux/kernel.h> 38d9ae7f2bSJakub Kicinski #include <linux/bpf.h> 39d9ae7f2bSJakub Kicinski #include <linux/filter.h> 40d9ae7f2bSJakub Kicinski #include <linux/pkt_cls.h> 41d9ae7f2bSJakub Kicinski #include <linux/unistd.h> 42d9ae7f2bSJakub Kicinski 43d9ae7f2bSJakub Kicinski #include "main.h" 44d9ae7f2bSJakub Kicinski #include "../nfp_asm.h" 45d9ae7f2bSJakub Kicinski 46d9ae7f2bSJakub Kicinski /* --- NFP prog --- */ 47d9ae7f2bSJakub Kicinski /* Foreach "multiple" entries macros provide pos and next<n> pointers. 48d9ae7f2bSJakub Kicinski * It's safe to modify the next pointers (but not pos). 49d9ae7f2bSJakub Kicinski */ 50d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk2(nfp_prog, pos, next) \ 51d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 52d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l); \ 53d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 54d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l; \ 55d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 56d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos)) 57d9ae7f2bSJakub Kicinski 58d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk3(nfp_prog, pos, next, next2) \ 59d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 60d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l), \ 61d9ae7f2bSJakub Kicinski next2 = list_next_entry(next, l); \ 62d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 63d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l && \ 64d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next2->l; \ 65d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 66d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos), \ 67d9ae7f2bSJakub Kicinski next2 = nfp_meta_next(next)) 68d9ae7f2bSJakub Kicinski 69d9ae7f2bSJakub Kicinski static bool 70d9ae7f2bSJakub Kicinski nfp_meta_has_prev(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 71d9ae7f2bSJakub Kicinski { 72d9ae7f2bSJakub Kicinski return meta->l.prev != &nfp_prog->insns; 73d9ae7f2bSJakub Kicinski } 74d9ae7f2bSJakub Kicinski 75d9ae7f2bSJakub Kicinski static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn) 76d9ae7f2bSJakub Kicinski { 77e8a4796eSJakub Kicinski if (nfp_prog->__prog_alloc_len / sizeof(u64) == nfp_prog->prog_len) { 78e8a4796eSJakub Kicinski pr_warn("instruction limit reached (%u NFP instructions)\n", 79e8a4796eSJakub Kicinski nfp_prog->prog_len); 80d9ae7f2bSJakub Kicinski nfp_prog->error = -ENOSPC; 81d9ae7f2bSJakub Kicinski return; 82d9ae7f2bSJakub Kicinski } 83d9ae7f2bSJakub Kicinski 84d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len] = insn; 85d9ae7f2bSJakub Kicinski nfp_prog->prog_len++; 86d9ae7f2bSJakub Kicinski } 87d9ae7f2bSJakub Kicinski 88d9ae7f2bSJakub Kicinski static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) 89d9ae7f2bSJakub Kicinski { 902314fe9eSJakub Kicinski return nfp_prog->prog_len; 91d9ae7f2bSJakub Kicinski } 92d9ae7f2bSJakub Kicinski 930d49eaf4SJakub Kicinski static bool 940d49eaf4SJakub Kicinski nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off) 950d49eaf4SJakub Kicinski { 960d49eaf4SJakub Kicinski /* If there is a recorded error we may have dropped instructions; 970d49eaf4SJakub Kicinski * that doesn't have to be due to translator bug, and the translation 980d49eaf4SJakub Kicinski * will fail anyway, so just return OK. 990d49eaf4SJakub Kicinski */ 1000d49eaf4SJakub Kicinski if (nfp_prog->error) 1010d49eaf4SJakub Kicinski return true; 1020d49eaf4SJakub Kicinski return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off); 1030d49eaf4SJakub Kicinski } 1040d49eaf4SJakub Kicinski 105d9ae7f2bSJakub Kicinski /* --- Emitters --- */ 106d9ae7f2bSJakub Kicinski static void 107d9ae7f2bSJakub Kicinski __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 108b556ddd9SJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, enum cmd_ctx_swap ctx, 109b556ddd9SJakub Kicinski bool indir) 110d9ae7f2bSJakub Kicinski { 111d9ae7f2bSJakub Kicinski u64 insn; 112d9ae7f2bSJakub Kicinski 113d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 114d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 115d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 116d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 117d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 118d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 119b556ddd9SJakub Kicinski FIELD_PREP(OP_CMD_SIG, ctx != CMD_CTX_NO_SWAP) | 120d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 1215468a8b9SJakub Kicinski FIELD_PREP(OP_CMD_INDIR, indir) | 122d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 123d9ae7f2bSJakub Kicinski 124d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 125d9ae7f2bSJakub Kicinski } 126d9ae7f2bSJakub Kicinski 127d9ae7f2bSJakub Kicinski static void 1285468a8b9SJakub Kicinski emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 129b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx, bool indir) 130d9ae7f2bSJakub Kicinski { 131d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 132d9ae7f2bSJakub Kicinski int err; 133d9ae7f2bSJakub Kicinski 134d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 135d9ae7f2bSJakub Kicinski if (err) { 136d9ae7f2bSJakub Kicinski nfp_prog->error = err; 137d9ae7f2bSJakub Kicinski return; 138d9ae7f2bSJakub Kicinski } 139d9ae7f2bSJakub Kicinski if (reg.swap) { 140d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 141d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 142d9ae7f2bSJakub Kicinski return; 143d9ae7f2bSJakub Kicinski } 144995e101fSJakub Kicinski if (reg.dst_lmextn || reg.src_lmextn) { 145995e101fSJakub Kicinski pr_err("cmd can't use LMextn\n"); 146995e101fSJakub Kicinski nfp_prog->error = -EFAULT; 147995e101fSJakub Kicinski return; 148995e101fSJakub Kicinski } 149d9ae7f2bSJakub Kicinski 150b556ddd9SJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, ctx, 1515468a8b9SJakub Kicinski indir); 1525468a8b9SJakub Kicinski } 1535468a8b9SJakub Kicinski 1545468a8b9SJakub Kicinski static void 1555468a8b9SJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 156b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1575468a8b9SJakub Kicinski { 158b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, false); 159d9ae7f2bSJakub Kicinski } 160d9ae7f2bSJakub Kicinski 161d9ae7f2bSJakub Kicinski static void 1629879a381SJiong Wang emit_cmd_indir(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 163b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1649879a381SJiong Wang { 165b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, true); 1669879a381SJiong Wang } 1679879a381SJiong Wang 1689879a381SJiong Wang static void 169d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 170d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 171d9ae7f2bSJakub Kicinski { 172d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 173d9ae7f2bSJakub Kicinski u64 insn; 174d9ae7f2bSJakub Kicinski 175d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 176d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 177d9ae7f2bSJakub Kicinski 178d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 179d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 180d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 181d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 182d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 183d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 184d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 185d9ae7f2bSJakub Kicinski 186d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 187d9ae7f2bSJakub Kicinski } 188d9ae7f2bSJakub Kicinski 1892314fe9eSJakub Kicinski static void 1902314fe9eSJakub Kicinski emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, 1912314fe9eSJakub Kicinski enum nfp_relo_type relo) 192d9ae7f2bSJakub Kicinski { 1932314fe9eSJakub Kicinski if (mask == BR_UNC && defer > 2) { 194d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 195d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 196d9ae7f2bSJakub Kicinski return; 197d9ae7f2bSJakub Kicinski } 1982314fe9eSJakub Kicinski 1992314fe9eSJakub Kicinski __emit_br(nfp_prog, mask, 2002314fe9eSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 2012314fe9eSJakub Kicinski BR_CSS_NONE, addr, defer); 2022314fe9eSJakub Kicinski 2032314fe9eSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 2042314fe9eSJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 205d9ae7f2bSJakub Kicinski } 206d9ae7f2bSJakub Kicinski 207d9ae7f2bSJakub Kicinski static void 208d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 209d9ae7f2bSJakub Kicinski { 2102314fe9eSJakub Kicinski emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); 211d9ae7f2bSJakub Kicinski } 212d9ae7f2bSJakub Kicinski 213d9ae7f2bSJakub Kicinski static void 214d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 215d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 216995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 217995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 218d9ae7f2bSJakub Kicinski { 219d9ae7f2bSJakub Kicinski u64 insn; 220d9ae7f2bSJakub Kicinski 221d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 222d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 223d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 224d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 225d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 226d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 227d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 228995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 229995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 230995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 231d9ae7f2bSJakub Kicinski 232d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 233d9ae7f2bSJakub Kicinski } 234d9ae7f2bSJakub Kicinski 235d9ae7f2bSJakub Kicinski static void 236b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 237d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 238d9ae7f2bSJakub Kicinski { 239d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 240d9ae7f2bSJakub Kicinski int err; 241d9ae7f2bSJakub Kicinski 242b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 243d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 244d9ae7f2bSJakub Kicinski return; 245d9ae7f2bSJakub Kicinski } 246d9ae7f2bSJakub Kicinski 247d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 248d9ae7f2bSJakub Kicinski if (err) { 249d9ae7f2bSJakub Kicinski nfp_prog->error = err; 250d9ae7f2bSJakub Kicinski return; 251d9ae7f2bSJakub Kicinski } 252d9ae7f2bSJakub Kicinski 2533239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 2543239e7bbSJiong Wang __emit_immed(nfp_prog, 2553239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 2563239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 2573239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 258d9ae7f2bSJakub Kicinski } 259d9ae7f2bSJakub Kicinski 260d9ae7f2bSJakub Kicinski static void 261d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 262d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 263995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 264995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 265d9ae7f2bSJakub Kicinski { 266d9ae7f2bSJakub Kicinski u64 insn; 267d9ae7f2bSJakub Kicinski 268d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 269d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 270d9ae7f2bSJakub Kicinski return; 271d9ae7f2bSJakub Kicinski } 272d9ae7f2bSJakub Kicinski 273d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 274d9ae7f2bSJakub Kicinski shift = 32 - shift; 275d9ae7f2bSJakub Kicinski 276d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 277d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 278d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 279d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 280d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 281d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 283d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 284d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 285d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 286995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 287995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 288995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 289d9ae7f2bSJakub Kicinski 290d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 291d9ae7f2bSJakub Kicinski } 292d9ae7f2bSJakub Kicinski 293d9ae7f2bSJakub Kicinski static void 294b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 295b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 296d9ae7f2bSJakub Kicinski { 297d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 298d9ae7f2bSJakub Kicinski int err; 299d9ae7f2bSJakub Kicinski 300d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 301d9ae7f2bSJakub Kicinski if (err) { 302d9ae7f2bSJakub Kicinski nfp_prog->error = err; 303d9ae7f2bSJakub Kicinski return; 304d9ae7f2bSJakub Kicinski } 305d9ae7f2bSJakub Kicinski 306d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 307995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 308995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 309d9ae7f2bSJakub Kicinski } 310d9ae7f2bSJakub Kicinski 311d9ae7f2bSJakub Kicinski static void 312d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 313995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 314995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 315d9ae7f2bSJakub Kicinski { 316d9ae7f2bSJakub Kicinski u64 insn; 317d9ae7f2bSJakub Kicinski 318d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 319d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 320d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 321d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 322d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 323d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 324d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 325995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 326995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 327995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 328d9ae7f2bSJakub Kicinski 329d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 330d9ae7f2bSJakub Kicinski } 331d9ae7f2bSJakub Kicinski 332d9ae7f2bSJakub Kicinski static void 333b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 334b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 335d9ae7f2bSJakub Kicinski { 336d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 337d9ae7f2bSJakub Kicinski int err; 338d9ae7f2bSJakub Kicinski 339d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 340d9ae7f2bSJakub Kicinski if (err) { 341d9ae7f2bSJakub Kicinski nfp_prog->error = err; 342d9ae7f2bSJakub Kicinski return; 343d9ae7f2bSJakub Kicinski } 344d9ae7f2bSJakub Kicinski 345d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 346995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 347995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 348d9ae7f2bSJakub Kicinski } 349d9ae7f2bSJakub Kicinski 350d9ae7f2bSJakub Kicinski static void 351d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 352d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 353995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 354995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 355d9ae7f2bSJakub Kicinski { 356d9ae7f2bSJakub Kicinski u64 insn; 357d9ae7f2bSJakub Kicinski 358d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 359d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 360d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 361d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 362d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 363d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 364d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 365d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 366d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 367995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 368995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 369995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 370d9ae7f2bSJakub Kicinski 371d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 372d9ae7f2bSJakub Kicinski } 373d9ae7f2bSJakub Kicinski 374d9ae7f2bSJakub Kicinski static void 375bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 376bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 377d9ae7f2bSJakub Kicinski { 378d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 379d9ae7f2bSJakub Kicinski int err; 380d9ae7f2bSJakub Kicinski 3812de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 3822de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 383d9ae7f2bSJakub Kicinski if (err) { 384d9ae7f2bSJakub Kicinski nfp_prog->error = err; 385d9ae7f2bSJakub Kicinski return; 386d9ae7f2bSJakub Kicinski } 387d9ae7f2bSJakub Kicinski 388d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 389995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 390995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 391d9ae7f2bSJakub Kicinski } 392d9ae7f2bSJakub Kicinski 393d9ae7f2bSJakub Kicinski static void 394b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 395d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 396d9ae7f2bSJakub Kicinski { 397bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 398d9ae7f2bSJakub Kicinski } 399d9ae7f2bSJakub Kicinski 4002df03a50SJakub Kicinski static void 4012df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 4022df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 4032df03a50SJakub Kicinski { 4042df03a50SJakub Kicinski u64 insn; 4052df03a50SJakub Kicinski 4062df03a50SJakub Kicinski insn = OP_LCSR_BASE | 4072df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 4082df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 4092df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 410df4a37d8SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr / 4) | 4112df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 4122df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 4132df03a50SJakub Kicinski 4142df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 4152df03a50SJakub Kicinski } 4162df03a50SJakub Kicinski 4172df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 4182df03a50SJakub Kicinski { 4192df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 4202df03a50SJakub Kicinski int err; 4212df03a50SJakub Kicinski 4222df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 4232df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 4242df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 4252df03a50SJakub Kicinski * copy the immed to both operands. 4262df03a50SJakub Kicinski */ 4272df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 4282df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 4292df03a50SJakub Kicinski reg.breg = reg.areg; 4302df03a50SJakub Kicinski } else { 4312df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 4322df03a50SJakub Kicinski } 4332df03a50SJakub Kicinski if (err) { 4342df03a50SJakub Kicinski nfp_prog->error = err; 4352df03a50SJakub Kicinski return; 4362df03a50SJakub Kicinski } 4372df03a50SJakub Kicinski 438df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr, 4392df03a50SJakub Kicinski false, reg.src_lmextn); 4402df03a50SJakub Kicinski } 4412df03a50SJakub Kicinski 442df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 443df4a37d8SJakub Kicinski static void __emit_csr_rd(struct nfp_prog *nfp_prog, u16 addr) 444df4a37d8SJakub Kicinski { 445df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, 0, 0, false, addr, false, false); 446df4a37d8SJakub Kicinski } 447df4a37d8SJakub Kicinski 4481c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 4491c03e03fSJakub Kicinski { 4501c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 4511c03e03fSJakub Kicinski } 4521c03e03fSJakub Kicinski 453d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 454d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 455d9ae7f2bSJakub Kicinski { 456d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 457d9ae7f2bSJakub Kicinski *val = imm; 458d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 459d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 460d9ae7f2bSJakub Kicinski *val = imm >> 8; 461d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 462d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 463d9ae7f2bSJakub Kicinski *val = imm >> 16; 464d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 465d9ae7f2bSJakub Kicinski } else { 466d9ae7f2bSJakub Kicinski return false; 467d9ae7f2bSJakub Kicinski } 468d9ae7f2bSJakub Kicinski 469d9ae7f2bSJakub Kicinski return true; 470d9ae7f2bSJakub Kicinski } 471d9ae7f2bSJakub Kicinski 472b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 473d9ae7f2bSJakub Kicinski { 474d9ae7f2bSJakub Kicinski enum immed_shift shift; 475d9ae7f2bSJakub Kicinski u16 val; 476d9ae7f2bSJakub Kicinski 477d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 478d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 479d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 480d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 481d9ae7f2bSJakub Kicinski } else { 482d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 483d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 484d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 485d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 486d9ae7f2bSJakub Kicinski } 487d9ae7f2bSJakub Kicinski } 488d9ae7f2bSJakub Kicinski 48977a3d311SJakub Kicinski static void 49077a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 49177a3d311SJakub Kicinski enum nfp_relo_type relo) 49277a3d311SJakub Kicinski { 49377a3d311SJakub Kicinski if (imm > 0xffff) { 49477a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 49577a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 49677a3d311SJakub Kicinski return; 49777a3d311SJakub Kicinski } 49877a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 49977a3d311SJakub Kicinski 50077a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 50177a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 50277a3d311SJakub Kicinski } 50377a3d311SJakub Kicinski 504d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 505d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 506d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 507d9ae7f2bSJakub Kicinski */ 508b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 509d9ae7f2bSJakub Kicinski { 510d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 511d9ae7f2bSJakub Kicinski return reg_imm(imm); 512d9ae7f2bSJakub Kicinski 513d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 514d9ae7f2bSJakub Kicinski return tmp_reg; 515d9ae7f2bSJakub Kicinski } 516d9ae7f2bSJakub Kicinski 517d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 518d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 519d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 520d9ae7f2bSJakub Kicinski */ 521b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 522d9ae7f2bSJakub Kicinski { 523d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 524d9ae7f2bSJakub Kicinski return reg_imm(imm); 525d9ae7f2bSJakub Kicinski 526d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 527d9ae7f2bSJakub Kicinski return tmp_reg; 528d9ae7f2bSJakub Kicinski } 529d9ae7f2bSJakub Kicinski 530ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 531ff42bb9fSJakub Kicinski { 532ff42bb9fSJakub Kicinski while (count--) 533ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 534ff42bb9fSJakub Kicinski } 535ff42bb9fSJakub Kicinski 536c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 537c000dfb5SJakub Kicinski { 538c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 539c000dfb5SJakub Kicinski } 540c000dfb5SJakub Kicinski 541d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 542d9ae7f2bSJakub Kicinski { 543c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 544d9ae7f2bSJakub Kicinski } 545d9ae7f2bSJakub Kicinski 5469879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 5479879a381SJiong Wang * result to @dst from low end. 5489879a381SJiong Wang */ 5499879a381SJiong Wang static void 5509879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 5519879a381SJiong Wang u8 offset) 5529879a381SJiong Wang { 5539879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 5549879a381SJiong Wang u8 mask = (1 << field_len) - 1; 5559879a381SJiong Wang 5569879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 5579879a381SJiong Wang } 5589879a381SJiong Wang 55991ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 56091ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 56191ff69e8SJiong Wang */ 56291ff69e8SJiong Wang static void 56391ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 56491ff69e8SJiong Wang u8 field_len, u8 offset) 56591ff69e8SJiong Wang { 56691ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 56791ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 56891ff69e8SJiong Wang 56991ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 57091ff69e8SJiong Wang } 57191ff69e8SJiong Wang 5723dd43c33SJakub Kicinski static void 5733dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 5743dd43c33SJakub Kicinski swreg *rega, swreg *regb) 5753dd43c33SJakub Kicinski { 5763dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 5773dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 5783dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 5793dd43c33SJakub Kicinski return; 5803dd43c33SJakub Kicinski } 5813dd43c33SJakub Kicinski 5823dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 5833dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 5843dd43c33SJakub Kicinski reg_imm(0)); 5853dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 5863dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 5873dd43c33SJakub Kicinski } 5883dd43c33SJakub Kicinski 5899879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 5909879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 5919879a381SJiong Wang { 5929879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 5939879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 5949879a381SJiong Wang swreg src_base, off; 5953dd43c33SJakub Kicinski bool src_40bit_addr; 5969879a381SJiong Wang unsigned int i; 5979879a381SJiong Wang u8 xfer_num; 5989879a381SJiong Wang 5999879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 6003dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 6019879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 6029879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 6039879a381SJiong Wang 6043dd43c33SJakub Kicinski if (src_40bit_addr) 6053dd43c33SJakub Kicinski addr40_offset(nfp_prog, meta->insn.src_reg, off, &src_base, 6063dd43c33SJakub Kicinski &off); 6073dd43c33SJakub Kicinski 6088c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 6098c900538SJiong Wang if (len > 32) 6108c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6118c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6128c900538SJiong Wang 6139879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 6143dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 6153dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 616b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 6179879a381SJiong Wang 6189879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 6199879a381SJiong Wang for (i = 0; i < xfer_num; i++) 6209879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 6219879a381SJiong Wang 6229879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 6239879a381SJiong Wang 6249879a381SJiong Wang if (len <= 8) { 6259879a381SJiong Wang /* Use single direct_ref write8. */ 6269879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6279879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 628b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6298c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 6309879a381SJiong Wang /* Use single direct_ref write32. */ 6319879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6329879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 633b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6348c900538SJiong Wang } else if (len <= 32) { 6359879a381SJiong Wang /* Use single indirect_ref write8. */ 6369879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 6379879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 6389879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6399879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 640b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 6418c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 6428c900538SJiong Wang /* Use single indirect_ref write32. */ 6438c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6448c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6458c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6468c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 647b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 6488c900538SJiong Wang } else if (len <= 40) { 6498c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 6508c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 6518c900538SJiong Wang */ 6528c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6538c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 654b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6558c900538SJiong Wang 6568c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 6578c900538SJiong Wang imm_b(nfp_prog)); 6588c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 6598c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 660b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6618c900538SJiong Wang } else { 6628c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 6638c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 6648c900538SJiong Wang */ 6658c900538SJiong Wang u8 new_off; 6668c900538SJiong Wang 6678c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6688c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 6698c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6708c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 671b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 6728c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 6738c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 6748c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 6758c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 676b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 6779879a381SJiong Wang } 6789879a381SJiong Wang 6799879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 6809879a381SJiong Wang * before and after we do memory copy optimization. 6819879a381SJiong Wang * 6829879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 6839879a381SJiong Wang * need to make sure it is loaded with the value the same as before 6849879a381SJiong Wang * this transformation. 6859879a381SJiong Wang * 6869879a381SJiong Wang * These extra loads could be removed once we have accurate register 6879879a381SJiong Wang * usage information. 6889879a381SJiong Wang */ 6899879a381SJiong Wang if (descending_seq) 6909879a381SJiong Wang xfer_num = 0; 6919879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 6929879a381SJiong Wang xfer_num = xfer_num - 1; 6939879a381SJiong Wang else 6949879a381SJiong Wang xfer_num = xfer_num - 2; 6959879a381SJiong Wang 6969879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 6979879a381SJiong Wang case BPF_B: 6989879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6999879a381SJiong Wang reg_xfer(xfer_num), 1, 7009879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 7019879a381SJiong Wang break; 7029879a381SJiong Wang case BPF_H: 7039879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7049879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 7059879a381SJiong Wang break; 7069879a381SJiong Wang case BPF_W: 7079879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7089879a381SJiong Wang reg_xfer(0)); 7099879a381SJiong Wang break; 7109879a381SJiong Wang case BPF_DW: 7119879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7129879a381SJiong Wang reg_xfer(xfer_num)); 7139879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 7149879a381SJiong Wang reg_xfer(xfer_num + 1)); 7159879a381SJiong Wang break; 7169879a381SJiong Wang } 7179879a381SJiong Wang 7189879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 7199879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 7209879a381SJiong Wang 7219879a381SJiong Wang return 0; 7229879a381SJiong Wang } 7239879a381SJiong Wang 724d9ae7f2bSJakub Kicinski static int 7250a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 726d9ae7f2bSJakub Kicinski { 727d9ae7f2bSJakub Kicinski unsigned int i; 728d9ae7f2bSJakub Kicinski u16 shift, sz; 729d9ae7f2bSJakub Kicinski 730d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 731d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 732d9ae7f2bSJakub Kicinski */ 7330a793977SJakub Kicinski sz = max(size, 4); 734d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 735d9ae7f2bSJakub Kicinski 7360a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 737b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 7380a793977SJakub Kicinski 7390a793977SJakub Kicinski i = 0; 7400a793977SJakub Kicinski if (shift) 7410a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 7420a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 7430a793977SJakub Kicinski else 7440a793977SJakub Kicinski for (; i * 4 < size; i++) 7450a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7460a793977SJakub Kicinski 7470a793977SJakub Kicinski if (i < 2) 7480a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7490a793977SJakub Kicinski 7500a793977SJakub Kicinski return 0; 7510a793977SJakub Kicinski } 7520a793977SJakub Kicinski 7530a793977SJakub Kicinski static int 7543dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 7553dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 7562ca71441SJakub Kicinski { 7572ca71441SJakub Kicinski unsigned int i; 7582ca71441SJakub Kicinski u8 mask, sz; 7592ca71441SJakub Kicinski 7603dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 7612ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 7622ca71441SJakub Kicinski */ 7632ca71441SJakub Kicinski sz = max(size, 4); 7642ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 7652ca71441SJakub Kicinski 7663dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 767b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 7682ca71441SJakub Kicinski 7692ca71441SJakub Kicinski i = 0; 7702ca71441SJakub Kicinski if (mask) 7712ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 7722ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 7732ca71441SJakub Kicinski else 7742ca71441SJakub Kicinski for (; i * 4 < size; i++) 7752ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7762ca71441SJakub Kicinski 7772ca71441SJakub Kicinski if (i < 2) 7782ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7792ca71441SJakub Kicinski 7802ca71441SJakub Kicinski return 0; 7812ca71441SJakub Kicinski } 7822ca71441SJakub Kicinski 7832ca71441SJakub Kicinski static int 7843dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7853dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7863dd43c33SJakub Kicinski { 7873dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 7883dd43c33SJakub Kicinski size, CMD_MODE_32b); 7893dd43c33SJakub Kicinski } 7903dd43c33SJakub Kicinski 7913dd43c33SJakub Kicinski static int 7923dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7933dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7943dd43c33SJakub Kicinski { 7953dd43c33SJakub Kicinski swreg rega, regb; 7963dd43c33SJakub Kicinski 7973dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 7983dd43c33SJakub Kicinski 7993dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 8003dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 8013dd43c33SJakub Kicinski } 8023dd43c33SJakub Kicinski 8033dd43c33SJakub Kicinski static int 8040a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 8050a793977SJakub Kicinski { 8060a793977SJakub Kicinski swreg tmp_reg; 8070a793977SJakub Kicinski 808d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 809d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8100a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 8110a793977SJakub Kicinski 812d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 813d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 814d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 815d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 81618e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 817e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8180a793977SJakub Kicinski 819d9ae7f2bSJakub Kicinski /* Load data */ 8200a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 821d9ae7f2bSJakub Kicinski } 822d9ae7f2bSJakub Kicinski 823d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 824d9ae7f2bSJakub Kicinski { 8250a793977SJakub Kicinski swreg tmp_reg; 8260a793977SJakub Kicinski 8270a793977SJakub Kicinski /* Check packet length */ 8280a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 8290a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 830e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8310a793977SJakub Kicinski 8320a793977SJakub Kicinski /* Load data */ 8330a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8340a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 835d9ae7f2bSJakub Kicinski } 836d9ae7f2bSJakub Kicinski 837e663fe38SJakub Kicinski static int 838e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 839e663fe38SJakub Kicinski u8 src_gpr, u8 size) 840e663fe38SJakub Kicinski { 841e663fe38SJakub Kicinski unsigned int i; 842e663fe38SJakub Kicinski 843e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 844e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 845e663fe38SJakub Kicinski 846e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 847b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 848e663fe38SJakub Kicinski 849e663fe38SJakub Kicinski return 0; 850e663fe38SJakub Kicinski } 851e663fe38SJakub Kicinski 852e663fe38SJakub Kicinski static int 853e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 854e663fe38SJakub Kicinski u64 imm, u8 size) 855e663fe38SJakub Kicinski { 856e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 857e663fe38SJakub Kicinski if (size == 8) 858e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 859e663fe38SJakub Kicinski 860e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 861b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 862e663fe38SJakub Kicinski 863e663fe38SJakub Kicinski return 0; 864e663fe38SJakub Kicinski } 865e663fe38SJakub Kicinski 866ee9133a8SJakub Kicinski typedef int 867ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 8682df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8692df03a50SJakub Kicinski bool needs_inc); 870a82b23fbSJakub Kicinski 871a82b23fbSJakub Kicinski static int 872a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 8732df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8742df03a50SJakub Kicinski bool needs_inc) 875a82b23fbSJakub Kicinski { 8762df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 877a82b23fbSJakub Kicinski u32 idx, src_byte; 878a82b23fbSJakub Kicinski enum shf_sc sc; 879a82b23fbSJakub Kicinski swreg reg; 880a82b23fbSJakub Kicinski int shf; 881a82b23fbSJakub Kicinski u8 mask; 882a82b23fbSJakub Kicinski 883a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 884a82b23fbSJakub Kicinski return -EOPNOTSUPP; 885a82b23fbSJakub Kicinski 886a82b23fbSJakub Kicinski idx = off / 4; 887a82b23fbSJakub Kicinski 888a82b23fbSJakub Kicinski /* Move the entire word */ 889a82b23fbSJakub Kicinski if (size == 4) { 8902df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 8912df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 892a82b23fbSJakub Kicinski return 0; 893a82b23fbSJakub Kicinski } 894a82b23fbSJakub Kicinski 8952df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8962df03a50SJakub Kicinski return -EOPNOTSUPP; 8972df03a50SJakub Kicinski 898a82b23fbSJakub Kicinski src_byte = off % 4; 899a82b23fbSJakub Kicinski 900a82b23fbSJakub Kicinski mask = (1 << size) - 1; 901a82b23fbSJakub Kicinski mask <<= dst_byte; 902a82b23fbSJakub Kicinski 903a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 904a82b23fbSJakub Kicinski return -EOPNOTSUPP; 905a82b23fbSJakub Kicinski 906a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 907a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 908a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 909a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 910a82b23fbSJakub Kicinski shf = 32 - shf; 911a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 912a82b23fbSJakub Kicinski } else { 913a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 914a82b23fbSJakub Kicinski } 915a82b23fbSJakub Kicinski 916a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 917a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 918a82b23fbSJakub Kicinski */ 919a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9202df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 921a82b23fbSJakub Kicinski } else { 922a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 9239a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 9249a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 9259a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 9269a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 9279a90c83cSJakub Kicinski */ 9289a90c83cSJakub Kicinski if (first || !new_gpr) 929a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 930a82b23fbSJakub Kicinski } 931a82b23fbSJakub Kicinski 932a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 933a82b23fbSJakub Kicinski 9342df03a50SJakub Kicinski if (should_inc) 9352df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9362df03a50SJakub Kicinski 937a82b23fbSJakub Kicinski return 0; 938a82b23fbSJakub Kicinski } 939ee9133a8SJakub Kicinski 940ee9133a8SJakub Kicinski static int 941ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 9422df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9432df03a50SJakub Kicinski bool needs_inc) 944ee9133a8SJakub Kicinski { 9452df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 946ee9133a8SJakub Kicinski u32 idx, dst_byte; 947ee9133a8SJakub Kicinski enum shf_sc sc; 948ee9133a8SJakub Kicinski swreg reg; 949ee9133a8SJakub Kicinski int shf; 950ee9133a8SJakub Kicinski u8 mask; 951ee9133a8SJakub Kicinski 952ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 953ee9133a8SJakub Kicinski return -EOPNOTSUPP; 954ee9133a8SJakub Kicinski 955ee9133a8SJakub Kicinski idx = off / 4; 956ee9133a8SJakub Kicinski 957ee9133a8SJakub Kicinski /* Move the entire word */ 958ee9133a8SJakub Kicinski if (size == 4) { 9592df03a50SJakub Kicinski wrp_mov(nfp_prog, 9602df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 9612df03a50SJakub Kicinski reg_b(src)); 962ee9133a8SJakub Kicinski return 0; 963ee9133a8SJakub Kicinski } 964ee9133a8SJakub Kicinski 9652df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9662df03a50SJakub Kicinski return -EOPNOTSUPP; 9672df03a50SJakub Kicinski 968ee9133a8SJakub Kicinski dst_byte = off % 4; 969ee9133a8SJakub Kicinski 970ee9133a8SJakub Kicinski mask = (1 << size) - 1; 971ee9133a8SJakub Kicinski mask <<= dst_byte; 972ee9133a8SJakub Kicinski 973ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 974ee9133a8SJakub Kicinski return -EOPNOTSUPP; 975ee9133a8SJakub Kicinski 976ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 977ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 978ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 979ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 980ee9133a8SJakub Kicinski shf = 32 - shf; 981ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 982ee9133a8SJakub Kicinski } else { 983ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 984ee9133a8SJakub Kicinski } 985ee9133a8SJakub Kicinski 986ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 987ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 988ee9133a8SJakub Kicinski */ 989ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9902df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 991ee9133a8SJakub Kicinski } else { 992ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 9939a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 9949a90c83cSJakub Kicinski * the middle location will be overwritten fully. 9959a90c83cSJakub Kicinski */ 9969a90c83cSJakub Kicinski if (first || last) 997ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 998ee9133a8SJakub Kicinski } 999ee9133a8SJakub Kicinski 1000ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 1001ee9133a8SJakub Kicinski 10029a90c83cSJakub Kicinski if (new_gpr || last) { 1003ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1004ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 10052df03a50SJakub Kicinski if (should_inc) 10062df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10079a90c83cSJakub Kicinski } 1008ee9133a8SJakub Kicinski 1009ee9133a8SJakub Kicinski return 0; 1010ee9133a8SJakub Kicinski } 1011ee9133a8SJakub Kicinski 1012ee9133a8SJakub Kicinski static int 1013ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1014b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1015b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1016ee9133a8SJakub Kicinski { 1017d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 10189a90c83cSJakub Kicinski bool first = true, last; 10192df03a50SJakub Kicinski bool needs_inc = false; 10202df03a50SJakub Kicinski swreg stack_off_reg; 1021a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1022ee9133a8SJakub Kicinski u32 gpr_byte = 0; 10232df03a50SJakub Kicinski bool lm3 = true; 1024ee9133a8SJakub Kicinski int ret; 1025ee9133a8SJakub Kicinski 1026b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1027b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1028b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1029b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1030b14157eeSJakub Kicinski */ 1031b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1032b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1033b14157eeSJakub Kicinski 1034b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1035b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1036b14157eeSJakub Kicinski 1037b14157eeSJakub Kicinski needs_inc = true; 1038b14157eeSJakub Kicinski } else if (off + size <= 64) { 10392df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 10402df03a50SJakub Kicinski lm3 = false; 10412df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 10422df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 10432df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 10442df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 10452df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 10462df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 10472df03a50SJakub Kicinski */ 10482df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 10492df03a50SJakub Kicinski stack_imm(nfp_prog)); 10502df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10512df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10522df03a50SJakub Kicinski 10532df03a50SJakub Kicinski off %= 32; 10542df03a50SJakub Kicinski } else { 10552df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 10562df03a50SJakub Kicinski stack_imm(nfp_prog)); 10572df03a50SJakub Kicinski 10582df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10592df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10602df03a50SJakub Kicinski 10612df03a50SJakub Kicinski needs_inc = true; 10622df03a50SJakub Kicinski } 10632df03a50SJakub Kicinski if (lm3) { 10642df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 10652df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 10662df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 10672df03a50SJakub Kicinski } 10682df03a50SJakub Kicinski 1069a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1070a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1071a82b23fbSJakub Kicinski 1072ee9133a8SJakub Kicinski while (size) { 1073ee9133a8SJakub Kicinski u32 slice_end; 1074ee9133a8SJakub Kicinski u8 slice_size; 1075ee9133a8SJakub Kicinski 1076ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1077ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1078ee9133a8SJakub Kicinski slice_size = slice_end - off; 1079ee9133a8SJakub Kicinski 10809a90c83cSJakub Kicinski last = slice_size == size; 10819a90c83cSJakub Kicinski 10822df03a50SJakub Kicinski if (needs_inc) 10832df03a50SJakub Kicinski off %= 4; 10842df03a50SJakub Kicinski 1085a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 10862df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1087ee9133a8SJakub Kicinski if (ret) 1088ee9133a8SJakub Kicinski return ret; 1089ee9133a8SJakub Kicinski 1090a82b23fbSJakub Kicinski prev_gpr = gpr; 10919a90c83cSJakub Kicinski first = false; 10929a90c83cSJakub Kicinski 1093ee9133a8SJakub Kicinski gpr_byte += slice_size; 1094ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1095ee9133a8SJakub Kicinski gpr_byte -= 4; 1096ee9133a8SJakub Kicinski gpr++; 1097ee9133a8SJakub Kicinski } 1098ee9133a8SJakub Kicinski 1099ee9133a8SJakub Kicinski size -= slice_size; 1100ee9133a8SJakub Kicinski off += slice_size; 1101ee9133a8SJakub Kicinski } 1102ee9133a8SJakub Kicinski 1103ee9133a8SJakub Kicinski return 0; 1104ee9133a8SJakub Kicinski } 1105ee9133a8SJakub Kicinski 1106d9ae7f2bSJakub Kicinski static void 1107d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1108d9ae7f2bSJakub Kicinski { 1109b3f868dfSJakub Kicinski swreg tmp_reg; 1110d9ae7f2bSJakub Kicinski 1111d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1112d9ae7f2bSJakub Kicinski if (!imm) 1113d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1114d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1115d9ae7f2bSJakub Kicinski return; 1116d9ae7f2bSJakub Kicinski } 1117d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1118d9ae7f2bSJakub Kicinski if (!~imm) 1119d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1120d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1121d9ae7f2bSJakub Kicinski return; 1122d9ae7f2bSJakub Kicinski } 1123d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1124d9ae7f2bSJakub Kicinski if (!~imm) 1125d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 11265d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1127d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1128d9ae7f2bSJakub Kicinski return; 1129d9ae7f2bSJakub Kicinski } 1130d9ae7f2bSJakub Kicinski 1131d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1132d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1133d9ae7f2bSJakub Kicinski } 1134d9ae7f2bSJakub Kicinski 1135d9ae7f2bSJakub Kicinski static int 1136d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1137d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1138d9ae7f2bSJakub Kicinski { 1139d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1140d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1141d9ae7f2bSJakub Kicinski 1142d9ae7f2bSJakub Kicinski if (skip) { 1143d9ae7f2bSJakub Kicinski meta->skip = true; 1144d9ae7f2bSJakub Kicinski return 0; 1145d9ae7f2bSJakub Kicinski } 1146d9ae7f2bSJakub Kicinski 1147d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1148d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1149d9ae7f2bSJakub Kicinski 1150d9ae7f2bSJakub Kicinski return 0; 1151d9ae7f2bSJakub Kicinski } 1152d9ae7f2bSJakub Kicinski 1153d9ae7f2bSJakub Kicinski static int 1154d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1155d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1156d9ae7f2bSJakub Kicinski { 1157d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1158d9ae7f2bSJakub Kicinski 1159d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1160d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1161d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1162d9ae7f2bSJakub Kicinski 1163d9ae7f2bSJakub Kicinski return 0; 1164d9ae7f2bSJakub Kicinski } 1165d9ae7f2bSJakub Kicinski 1166d9ae7f2bSJakub Kicinski static int 1167d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1168d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1169d9ae7f2bSJakub Kicinski { 1170d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1171d9ae7f2bSJakub Kicinski 1172d9ae7f2bSJakub Kicinski if (skip) { 1173d9ae7f2bSJakub Kicinski meta->skip = true; 1174d9ae7f2bSJakub Kicinski return 0; 1175d9ae7f2bSJakub Kicinski } 1176d9ae7f2bSJakub Kicinski 1177d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1178d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1179d9ae7f2bSJakub Kicinski 1180d9ae7f2bSJakub Kicinski return 0; 1181d9ae7f2bSJakub Kicinski } 1182d9ae7f2bSJakub Kicinski 1183d9ae7f2bSJakub Kicinski static int 1184d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1185d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1186d9ae7f2bSJakub Kicinski { 1187d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1188d9ae7f2bSJakub Kicinski 1189d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1190d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1191d9ae7f2bSJakub Kicinski 1192d9ae7f2bSJakub Kicinski return 0; 1193d9ae7f2bSJakub Kicinski } 1194d9ae7f2bSJakub Kicinski 1195d9ae7f2bSJakub Kicinski static void 1196d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1197d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1198d9ae7f2bSJakub Kicinski { 1199d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1200d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1201d9ae7f2bSJakub Kicinski } 1202d9ae7f2bSJakub Kicinski 1203d9ae7f2bSJakub Kicinski static int 1204d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1205d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1206d9ae7f2bSJakub Kicinski { 1207d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1208d9ae7f2bSJakub Kicinski 1209d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1210d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1211d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1212d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1213d9ae7f2bSJakub Kicinski 1214d9ae7f2bSJakub Kicinski return 0; 1215d9ae7f2bSJakub Kicinski } 1216d9ae7f2bSJakub Kicinski 1217d9ae7f2bSJakub Kicinski static int 1218d9ae7f2bSJakub Kicinski wrp_cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1219d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1220d9ae7f2bSJakub Kicinski { 1221d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1222d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1223d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1224b3f868dfSJakub Kicinski swreg tmp_reg; 1225d9ae7f2bSJakub Kicinski 1226d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1227d9ae7f2bSJakub Kicinski if (!swap) 1228d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), ALU_OP_SUB, tmp_reg); 1229d9ae7f2bSJakub Kicinski else 1230d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, ALU_OP_SUB, reg_a(reg)); 1231d9ae7f2bSJakub Kicinski 1232d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1233d9ae7f2bSJakub Kicinski if (!swap) 1234d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1235d9ae7f2bSJakub Kicinski reg_a(reg + 1), ALU_OP_SUB_C, tmp_reg); 1236d9ae7f2bSJakub Kicinski else 1237d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1238d9ae7f2bSJakub Kicinski tmp_reg, ALU_OP_SUB_C, reg_a(reg + 1)); 1239d9ae7f2bSJakub Kicinski 1240d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1241d9ae7f2bSJakub Kicinski 1242d9ae7f2bSJakub Kicinski return 0; 1243d9ae7f2bSJakub Kicinski } 1244d9ae7f2bSJakub Kicinski 1245d9ae7f2bSJakub Kicinski static int 1246d9ae7f2bSJakub Kicinski wrp_cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1247d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1248d9ae7f2bSJakub Kicinski { 1249d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 125026fa818dSJakub Kicinski u8 areg, breg; 125126fa818dSJakub Kicinski 125226fa818dSJakub Kicinski areg = insn->dst_reg * 2; 125326fa818dSJakub Kicinski breg = insn->src_reg * 2; 1254d9ae7f2bSJakub Kicinski 1255d9ae7f2bSJakub Kicinski if (swap) { 1256d9ae7f2bSJakub Kicinski areg ^= breg; 1257d9ae7f2bSJakub Kicinski breg ^= areg; 1258d9ae7f2bSJakub Kicinski areg ^= breg; 1259d9ae7f2bSJakub Kicinski } 1260d9ae7f2bSJakub Kicinski 1261d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1262d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1263d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 1264d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1265d9ae7f2bSJakub Kicinski 1266d9ae7f2bSJakub Kicinski return 0; 1267d9ae7f2bSJakub Kicinski } 1268d9ae7f2bSJakub Kicinski 12693119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 12703119d1fdSJakub Kicinski { 12713119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 12723119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 12733119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 12743119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 12753119d1fdSJakub Kicinski } 12763119d1fdSJakub Kicinski 12770d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12780d49eaf4SJakub Kicinski { 12790d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 12800d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 12810d49eaf4SJakub Kicinski u32 ret_einval, end; 12820d49eaf4SJakub Kicinski 12830d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 12840d49eaf4SJakub Kicinski 12858231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 12868231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 12878231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 12888231f844SJakub Kicinski return -EINVAL; 12898231f844SJakub Kicinski 12908231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 12918231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 12928231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12938231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12948231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12958231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12968231f844SJakub Kicinski 12978231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12988231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12998231f844SJakub Kicinski 13008231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 13018231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 13028231f844SJakub Kicinski */ 13038231f844SJakub Kicinski 13048231f844SJakub Kicinski return 0; 13058231f844SJakub Kicinski } 13068231f844SJakub Kicinski 13070d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 13080d49eaf4SJakub Kicinski end = ret_einval + 2; 13090d49eaf4SJakub Kicinski 13100d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 13110d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 13120d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 13130d49eaf4SJakub Kicinski 13140d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 13150d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13160d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 13170d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13180d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13190d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 13200d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13210d49eaf4SJakub Kicinski 13220d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 13230d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 13240d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13250d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13260d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 13270d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 13280d49eaf4SJakub Kicinski 13290d49eaf4SJakub Kicinski /* Load the ret code */ 13300d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 13310d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 13320d49eaf4SJakub Kicinski 13330d49eaf4SJakub Kicinski /* Modify the packet metadata */ 13340d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 13350d49eaf4SJakub Kicinski 13360d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 13372314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 13380d49eaf4SJakub Kicinski 13390d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13400d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13410d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 13420d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13430d49eaf4SJakub Kicinski 13440d49eaf4SJakub Kicinski /* return -EINVAL target */ 13450d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 13460d49eaf4SJakub Kicinski return -EINVAL; 13470d49eaf4SJakub Kicinski 13480d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 13490d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 13500d49eaf4SJakub Kicinski 13510d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 13520d49eaf4SJakub Kicinski return -EINVAL; 13530d49eaf4SJakub Kicinski 13540d49eaf4SJakub Kicinski return 0; 13550d49eaf4SJakub Kicinski } 13560d49eaf4SJakub Kicinski 135777a3d311SJakub Kicinski static int 1358fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 135977a3d311SJakub Kicinski { 136077a3d311SJakub Kicinski struct bpf_offloaded_map *offmap; 136177a3d311SJakub Kicinski struct nfp_bpf_map *nfp_map; 136277a3d311SJakub Kicinski bool load_lm_ptr; 136377a3d311SJakub Kicinski u32 ret_tgt; 136477a3d311SJakub Kicinski s64 lm_off; 136577a3d311SJakub Kicinski swreg tid; 136677a3d311SJakub Kicinski 136777a3d311SJakub Kicinski offmap = (struct bpf_offloaded_map *)meta->arg1.map_ptr; 136877a3d311SJakub Kicinski nfp_map = offmap->dev_priv; 136977a3d311SJakub Kicinski 137077a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 137177a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 13722f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 13732f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 137477a3d311SJakub Kicinski 137577a3d311SJakub Kicinski /* Set LM0 to start of key */ 137677a3d311SJakub Kicinski if (load_lm_ptr) 137777a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 137844d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 137944d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 138077a3d311SJakub Kicinski 138177a3d311SJakub Kicinski /* Load map ID into a register, it should actually fit as an immediate 138277a3d311SJakub Kicinski * but in case it doesn't deal with it here, not in the delay slots. 138377a3d311SJakub Kicinski */ 138477a3d311SJakub Kicinski tid = ur_load_imm_any(nfp_prog, nfp_map->tid, imm_a(nfp_prog)); 138577a3d311SJakub Kicinski 1386fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 138777a3d311SJakub Kicinski 2, RELO_BR_HELPER); 138877a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 138977a3d311SJakub Kicinski 139077a3d311SJakub Kicinski /* Load map ID into A0 */ 139177a3d311SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), tid); 139277a3d311SJakub Kicinski 139377a3d311SJakub Kicinski /* Load the return address into B0 */ 139477a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 139577a3d311SJakub Kicinski 139677a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 139777a3d311SJakub Kicinski return -EINVAL; 139877a3d311SJakub Kicinski 139977a3d311SJakub Kicinski /* Reset the LM0 pointer */ 140077a3d311SJakub Kicinski if (!load_lm_ptr) 140177a3d311SJakub Kicinski return 0; 140277a3d311SJakub Kicinski 140377a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 140477a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 140577a3d311SJakub Kicinski 140677a3d311SJakub Kicinski return 0; 140777a3d311SJakub Kicinski } 140877a3d311SJakub Kicinski 1409df4a37d8SJakub Kicinski static int 1410df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1411df4a37d8SJakub Kicinski { 1412df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1413df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1414df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1415df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1416df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1417df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1418df4a37d8SJakub Kicinski return 0; 1419df4a37d8SJakub Kicinski } 1420df4a37d8SJakub Kicinski 1421d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1422d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1423d9ae7f2bSJakub Kicinski { 1424d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1425b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1426b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1427d9ae7f2bSJakub Kicinski 1428b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1429b14157eeSJakub Kicinski swreg stack_depth_reg; 1430b14157eeSJakub Kicinski 1431b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1432b14157eeSJakub Kicinski nfp_prog->stack_depth, 1433b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1434b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1435b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1436b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1437b14157eeSJakub Kicinski } else { 1438b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1439b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1440b14157eeSJakub Kicinski } 1441d9ae7f2bSJakub Kicinski 1442d9ae7f2bSJakub Kicinski return 0; 1443d9ae7f2bSJakub Kicinski } 1444d9ae7f2bSJakub Kicinski 1445d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1446d9ae7f2bSJakub Kicinski { 1447d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1448d9ae7f2bSJakub Kicinski 1449d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1450d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1451d9ae7f2bSJakub Kicinski 1452d9ae7f2bSJakub Kicinski return 0; 1453d9ae7f2bSJakub Kicinski } 1454d9ae7f2bSJakub Kicinski 1455d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1456d9ae7f2bSJakub Kicinski { 1457d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1458d9ae7f2bSJakub Kicinski } 1459d9ae7f2bSJakub Kicinski 1460d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1461d9ae7f2bSJakub Kicinski { 1462d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1463d9ae7f2bSJakub Kicinski } 1464d9ae7f2bSJakub Kicinski 1465d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1466d9ae7f2bSJakub Kicinski { 1467d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1468d9ae7f2bSJakub Kicinski } 1469d9ae7f2bSJakub Kicinski 1470d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1471d9ae7f2bSJakub Kicinski { 1472d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1473d9ae7f2bSJakub Kicinski } 1474d9ae7f2bSJakub Kicinski 1475d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1476d9ae7f2bSJakub Kicinski { 1477d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1478d9ae7f2bSJakub Kicinski } 1479d9ae7f2bSJakub Kicinski 1480d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1481d9ae7f2bSJakub Kicinski { 1482d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1483d9ae7f2bSJakub Kicinski } 1484d9ae7f2bSJakub Kicinski 1485d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1486d9ae7f2bSJakub Kicinski { 1487d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1488d9ae7f2bSJakub Kicinski 1489d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1490d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1491d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1492d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1493d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1494d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1495d9ae7f2bSJakub Kicinski 1496d9ae7f2bSJakub Kicinski return 0; 1497d9ae7f2bSJakub Kicinski } 1498d9ae7f2bSJakub Kicinski 1499d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1500d9ae7f2bSJakub Kicinski { 1501d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1502d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1503d9ae7f2bSJakub Kicinski 1504d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1505d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1506d9ae7f2bSJakub Kicinski 1507d9ae7f2bSJakub Kicinski return 0; 1508d9ae7f2bSJakub Kicinski } 1509d9ae7f2bSJakub Kicinski 1510d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1511d9ae7f2bSJakub Kicinski { 1512d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1513d9ae7f2bSJakub Kicinski 1514d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1515d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1516d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1517d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1518d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1519d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1520d9ae7f2bSJakub Kicinski 1521d9ae7f2bSJakub Kicinski return 0; 1522d9ae7f2bSJakub Kicinski } 1523d9ae7f2bSJakub Kicinski 1524d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1525d9ae7f2bSJakub Kicinski { 1526d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1527d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1528d9ae7f2bSJakub Kicinski 1529d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1530d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1531d9ae7f2bSJakub Kicinski 1532d9ae7f2bSJakub Kicinski return 0; 1533d9ae7f2bSJakub Kicinski } 1534d9ae7f2bSJakub Kicinski 1535254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1536254ef4d7SJiong Wang { 1537254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1538254ef4d7SJiong Wang 1539254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1540254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1541254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1542254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1543254ef4d7SJiong Wang 1544254ef4d7SJiong Wang return 0; 1545254ef4d7SJiong Wang } 1546254ef4d7SJiong Wang 1547d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1548d9ae7f2bSJakub Kicinski { 1549d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15503cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1551d9ae7f2bSJakub Kicinski 15523cae1319SJakub Kicinski if (insn->imm < 32) { 15533cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15543cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15553cae1319SJakub Kicinski SHF_SC_R_DSHF, 32 - insn->imm); 15563cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15573cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15583cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm); 15593cae1319SJakub Kicinski } else if (insn->imm == 32) { 15603cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, dst); 15613cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15623cae1319SJakub Kicinski } else if (insn->imm > 32) { 15633cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15643cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15653cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm - 32); 15663cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15673cae1319SJakub Kicinski } 1568d9ae7f2bSJakub Kicinski 1569d9ae7f2bSJakub Kicinski return 0; 1570d9ae7f2bSJakub Kicinski } 1571d9ae7f2bSJakub Kicinski 1572d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1573d9ae7f2bSJakub Kicinski { 1574d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15753cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1576d9ae7f2bSJakub Kicinski 15773cae1319SJakub Kicinski if (insn->imm < 32) { 15783cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15793cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15803cae1319SJakub Kicinski SHF_SC_R_DSHF, insn->imm); 15813cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15823cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15833cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm); 15843cae1319SJakub Kicinski } else if (insn->imm == 32) { 15853cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst, dst + 1); 15863cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15873cae1319SJakub Kicinski } else if (insn->imm > 32) { 15883cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15893cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15903cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm - 32); 15913cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15923cae1319SJakub Kicinski } 1593d9ae7f2bSJakub Kicinski 1594d9ae7f2bSJakub Kicinski return 0; 1595d9ae7f2bSJakub Kicinski } 1596d9ae7f2bSJakub Kicinski 1597d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1598d9ae7f2bSJakub Kicinski { 1599d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1600d9ae7f2bSJakub Kicinski 1601d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1602d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1603d9ae7f2bSJakub Kicinski 1604d9ae7f2bSJakub Kicinski return 0; 1605d9ae7f2bSJakub Kicinski } 1606d9ae7f2bSJakub Kicinski 1607d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1608d9ae7f2bSJakub Kicinski { 1609d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1610d9ae7f2bSJakub Kicinski 1611d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1612d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1613d9ae7f2bSJakub Kicinski 1614d9ae7f2bSJakub Kicinski return 0; 1615d9ae7f2bSJakub Kicinski } 1616d9ae7f2bSJakub Kicinski 1617d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1618d9ae7f2bSJakub Kicinski { 1619d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1620d9ae7f2bSJakub Kicinski } 1621d9ae7f2bSJakub Kicinski 1622d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1623d9ae7f2bSJakub Kicinski { 1624d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1625d9ae7f2bSJakub Kicinski } 1626d9ae7f2bSJakub Kicinski 1627d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1628d9ae7f2bSJakub Kicinski { 1629d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1630d9ae7f2bSJakub Kicinski } 1631d9ae7f2bSJakub Kicinski 1632d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1633d9ae7f2bSJakub Kicinski { 1634d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1635d9ae7f2bSJakub Kicinski } 1636d9ae7f2bSJakub Kicinski 1637d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1638d9ae7f2bSJakub Kicinski { 1639d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1640d9ae7f2bSJakub Kicinski } 1641d9ae7f2bSJakub Kicinski 1642d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1643d9ae7f2bSJakub Kicinski { 1644d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1645d9ae7f2bSJakub Kicinski } 1646d9ae7f2bSJakub Kicinski 1647d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1648d9ae7f2bSJakub Kicinski { 1649d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1650d9ae7f2bSJakub Kicinski } 1651d9ae7f2bSJakub Kicinski 1652d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1653d9ae7f2bSJakub Kicinski { 1654d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1655d9ae7f2bSJakub Kicinski } 1656d9ae7f2bSJakub Kicinski 1657d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1658d9ae7f2bSJakub Kicinski { 1659d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1660d9ae7f2bSJakub Kicinski } 1661d9ae7f2bSJakub Kicinski 1662d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1663d9ae7f2bSJakub Kicinski { 1664d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1665d9ae7f2bSJakub Kicinski } 1666d9ae7f2bSJakub Kicinski 1667254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1668254ef4d7SJiong Wang { 1669254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1670254ef4d7SJiong Wang 1671254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1672254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1673254ef4d7SJiong Wang 1674254ef4d7SJiong Wang return 0; 1675254ef4d7SJiong Wang } 1676254ef4d7SJiong Wang 1677d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1678d9ae7f2bSJakub Kicinski { 1679d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1680d9ae7f2bSJakub Kicinski 1681d9ae7f2bSJakub Kicinski if (!insn->imm) 1682d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1683d9ae7f2bSJakub Kicinski 1684d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1685d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1686d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1687d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1688d9ae7f2bSJakub Kicinski 1689d9ae7f2bSJakub Kicinski return 0; 1690d9ae7f2bSJakub Kicinski } 1691d9ae7f2bSJakub Kicinski 16923119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16933119d1fdSJakub Kicinski { 16943119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 16953119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 16963119d1fdSJakub Kicinski 16973119d1fdSJakub Kicinski switch (insn->imm) { 16983119d1fdSJakub Kicinski case 16: 16993119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 17003119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 17013119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 17023119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 17033119d1fdSJakub Kicinski 17043119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 17053119d1fdSJakub Kicinski break; 17063119d1fdSJakub Kicinski case 32: 17073119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 17083119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 17093119d1fdSJakub Kicinski break; 17103119d1fdSJakub Kicinski case 64: 17113119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 17123119d1fdSJakub Kicinski 17133119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 17143119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 17153119d1fdSJakub Kicinski break; 17163119d1fdSJakub Kicinski } 17173119d1fdSJakub Kicinski 17183119d1fdSJakub Kicinski return 0; 17193119d1fdSJakub Kicinski } 17203119d1fdSJakub Kicinski 1721d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1722d9ae7f2bSJakub Kicinski { 17239f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 17249f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 17259f16c8abSJakub Kicinski u8 dst; 17269f16c8abSJakub Kicinski 17279f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 17289f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 17299f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 17309f16c8abSJakub Kicinski 17319f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 17329f16c8abSJakub Kicinski 17339f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 17349f16c8abSJakub Kicinski if (imm_hi == imm_lo) 17359f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 17369f16c8abSJakub Kicinski else 17379f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 1738d9ae7f2bSJakub Kicinski 1739d9ae7f2bSJakub Kicinski return 0; 1740d9ae7f2bSJakub Kicinski } 1741d9ae7f2bSJakub Kicinski 1742d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1743d9ae7f2bSJakub Kicinski { 1744d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1745d9ae7f2bSJakub Kicinski return 0; 1746d9ae7f2bSJakub Kicinski } 1747d9ae7f2bSJakub Kicinski 1748d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1749d9ae7f2bSJakub Kicinski { 1750d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1751d9ae7f2bSJakub Kicinski } 1752d9ae7f2bSJakub Kicinski 1753d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1754d9ae7f2bSJakub Kicinski { 1755d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1756d9ae7f2bSJakub Kicinski } 1757d9ae7f2bSJakub Kicinski 1758d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1759d9ae7f2bSJakub Kicinski { 1760d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1761d9ae7f2bSJakub Kicinski } 1762d9ae7f2bSJakub Kicinski 1763d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1764d9ae7f2bSJakub Kicinski { 1765d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17660a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 1767d9ae7f2bSJakub Kicinski } 1768d9ae7f2bSJakub Kicinski 1769d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1770d9ae7f2bSJakub Kicinski { 1771d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17720a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 1773d9ae7f2bSJakub Kicinski } 1774d9ae7f2bSJakub Kicinski 1775d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1776d9ae7f2bSJakub Kicinski { 1777d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17780a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 1779d9ae7f2bSJakub Kicinski } 1780d9ae7f2bSJakub Kicinski 1781a82b23fbSJakub Kicinski static int 1782a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1783d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1784a82b23fbSJakub Kicinski { 1785d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1786b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 1787b14157eeSJakub Kicinski true, wrp_lmem_load); 1788a82b23fbSJakub Kicinski } 1789a82b23fbSJakub Kicinski 1790943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1791943c57b9SJakub Kicinski u8 size) 1792d9ae7f2bSJakub Kicinski { 1793bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1794bfddbc8aSJakub Kicinski 1795943c57b9SJakub Kicinski switch (meta->insn.off) { 1796c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 1797c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 1798943c57b9SJakub Kicinski return -EOPNOTSUPP; 1799bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 1800bfddbc8aSJakub Kicinski break; 1801c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 1802c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 1803bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1804bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1805bfddbc8aSJakub Kicinski break; 1806c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 1807c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 1808bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1809bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 1810bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1811943c57b9SJakub Kicinski break; 1812943c57b9SJakub Kicinski default: 1813d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1814943c57b9SJakub Kicinski } 1815943c57b9SJakub Kicinski 1816943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1817d9ae7f2bSJakub Kicinski 1818d9ae7f2bSJakub Kicinski return 0; 1819d9ae7f2bSJakub Kicinski } 1820d9ae7f2bSJakub Kicinski 1821943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1822943c57b9SJakub Kicinski u8 size) 1823d9ae7f2bSJakub Kicinski { 1824b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1825d9ae7f2bSJakub Kicinski 1826943c57b9SJakub Kicinski switch (meta->insn.off) { 1827c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 1828c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 1829c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1830c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1831943c57b9SJakub Kicinski break; 1832c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 1833c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 1834c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1835943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 1836943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1837943c57b9SJakub Kicinski break; 1838943c57b9SJakub Kicinski default: 1839943c57b9SJakub Kicinski return -EOPNOTSUPP; 1840943c57b9SJakub Kicinski } 1841d9ae7f2bSJakub Kicinski 1842943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1843d9ae7f2bSJakub Kicinski 1844d9ae7f2bSJakub Kicinski return 0; 1845d9ae7f2bSJakub Kicinski } 1846d9ae7f2bSJakub Kicinski 18472ca71441SJakub Kicinski static int 18482ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18492ca71441SJakub Kicinski unsigned int size) 18502ca71441SJakub Kicinski { 18512ca71441SJakub Kicinski swreg tmp_reg; 18522ca71441SJakub Kicinski 18532ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18542ca71441SJakub Kicinski 18553dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 18563dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18573dd43c33SJakub Kicinski } 18583dd43c33SJakub Kicinski 18593dd43c33SJakub Kicinski static int 18603dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18613dd43c33SJakub Kicinski unsigned int size) 18623dd43c33SJakub Kicinski { 18633dd43c33SJakub Kicinski swreg tmp_reg; 18643dd43c33SJakub Kicinski 18653dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18663dd43c33SJakub Kicinski 18673dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 18683dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18692ca71441SJakub Kicinski } 18702ca71441SJakub Kicinski 1871be759237SJiong Wang static void 1872be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 1873be759237SJiong Wang struct nfp_insn_meta *meta) 1874be759237SJiong Wang { 1875be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 1876be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 1877be759237SJiong Wang swreg src_base, off; 1878be759237SJiong Wang u8 xfer_num, len; 1879be759237SJiong Wang bool indir; 1880be759237SJiong Wang 1881be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 1882be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 1883be759237SJiong Wang len = range_end - range_start; 1884be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 1885be759237SJiong Wang 1886be759237SJiong Wang indir = len > 8 * REG_WIDTH; 1887be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 1888be759237SJiong Wang if (indir) 1889be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 1890be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 1891be759237SJiong Wang 1892be759237SJiong Wang /* Cache memory into transfer-in registers. */ 1893be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 1894b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 1895be759237SJiong Wang } 1896be759237SJiong Wang 1897be759237SJiong Wang static int 189891ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 189991ff69e8SJiong Wang struct nfp_insn_meta *meta, 190091ff69e8SJiong Wang unsigned int size) 190191ff69e8SJiong Wang { 190291ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 190391ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 190491ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 190591ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 190691ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 190791ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 190891ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 190991ff69e8SJiong Wang 191091ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 191191ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 191291ff69e8SJiong Wang src_lo = reg_xfer(idx); 191391ff69e8SJiong Wang 191491ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 191591ff69e8SJiong Wang if (size > REG_WIDTH - off) { 191691ff69e8SJiong Wang /* Calculate the part in the second register. */ 191791ff69e8SJiong Wang len_lo = REG_WIDTH - off; 191891ff69e8SJiong Wang len_mid = size - len_lo; 191991ff69e8SJiong Wang 192091ff69e8SJiong Wang /* Calculate the part in the third register. */ 192191ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 192291ff69e8SJiong Wang len_mid = REG_WIDTH; 192391ff69e8SJiong Wang } 192491ff69e8SJiong Wang 192591ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 192691ff69e8SJiong Wang 192791ff69e8SJiong Wang if (!len_mid) { 192891ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 192991ff69e8SJiong Wang return 0; 193091ff69e8SJiong Wang } 193191ff69e8SJiong Wang 193291ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 193391ff69e8SJiong Wang 193491ff69e8SJiong Wang if (size <= REG_WIDTH) { 193591ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 193691ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 193791ff69e8SJiong Wang } else { 193891ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 193991ff69e8SJiong Wang 194091ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 194191ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 194291ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 194391ff69e8SJiong Wang REG_WIDTH - len_lo); 194491ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 194591ff69e8SJiong Wang len_lo); 194691ff69e8SJiong Wang } 194791ff69e8SJiong Wang 194891ff69e8SJiong Wang return 0; 194991ff69e8SJiong Wang } 195091ff69e8SJiong Wang 195191ff69e8SJiong Wang static int 1952be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 1953be759237SJiong Wang struct nfp_insn_meta *meta, 1954be759237SJiong Wang unsigned int size) 1955be759237SJiong Wang { 1956be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 1957be759237SJiong Wang u8 dst_gpr, idx; 1958be759237SJiong Wang 1959be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 1960be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 1961be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 1962be759237SJiong Wang dst_lo = reg_both(dst_gpr); 1963be759237SJiong Wang src_lo = reg_xfer(idx); 1964be759237SJiong Wang 1965be759237SJiong Wang if (size < REG_WIDTH) { 1966be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 1967be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1968be759237SJiong Wang } else if (size == REG_WIDTH) { 1969be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1970be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1971be759237SJiong Wang } else { 1972be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 1973be759237SJiong Wang 1974be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1975be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 1976be759237SJiong Wang } 1977be759237SJiong Wang 1978be759237SJiong Wang return 0; 1979be759237SJiong Wang } 1980be759237SJiong Wang 1981be759237SJiong Wang static int 1982be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 1983be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 1984be759237SJiong Wang { 1985be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 1986be759237SJiong Wang 198791ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 1988be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 198991ff69e8SJiong Wang 199091ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 1991be759237SJiong Wang } 1992be759237SJiong Wang 19932ca71441SJakub Kicinski static int 19942ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 19952ca71441SJakub Kicinski unsigned int size) 19962ca71441SJakub Kicinski { 19979879a381SJiong Wang if (meta->ldst_gather_len) 19989879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 19999879a381SJiong Wang 20002ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2001012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 20022ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 20032ca71441SJakub Kicinski else 20042ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 20052ca71441SJakub Kicinski } 20062ca71441SJakub Kicinski 2007be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2008be759237SJiong Wang if (meta->pkt_cache.range_end) { 2009be759237SJiong Wang if (meta->pkt_cache.do_init) 2010be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2011be759237SJiong Wang 2012be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2013be759237SJiong Wang } else { 20142ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2015be759237SJiong Wang } 2016be759237SJiong Wang } 20172ca71441SJakub Kicinski 2018a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2019d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2020d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2021a82b23fbSJakub Kicinski 20223dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 20233dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 20243dd43c33SJakub Kicinski 20252ca71441SJakub Kicinski return -EOPNOTSUPP; 20262ca71441SJakub Kicinski } 20272ca71441SJakub Kicinski 20282ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20292ca71441SJakub Kicinski { 20302ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 20312ca71441SJakub Kicinski } 20322ca71441SJakub Kicinski 20332ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20342ca71441SJakub Kicinski { 20352ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 20362ca71441SJakub Kicinski } 20372ca71441SJakub Kicinski 2038d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2039d9ae7f2bSJakub Kicinski { 20402ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 20412ca71441SJakub Kicinski } 20422ca71441SJakub Kicinski 20432ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20442ca71441SJakub Kicinski { 20452ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2046d9ae7f2bSJakub Kicinski } 2047d9ae7f2bSJakub Kicinski 2048e663fe38SJakub Kicinski static int 2049e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2050e663fe38SJakub Kicinski unsigned int size) 2051d9ae7f2bSJakub Kicinski { 2052e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2053e663fe38SJakub Kicinski swreg off_reg; 2054e663fe38SJakub Kicinski 2055e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2056e663fe38SJakub Kicinski 2057e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2058e663fe38SJakub Kicinski imm, size); 2059e663fe38SJakub Kicinski } 2060e663fe38SJakub Kicinski 2061e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2062e663fe38SJakub Kicinski unsigned int size) 2063e663fe38SJakub Kicinski { 2064e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2065e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2066e663fe38SJakub Kicinski 2067d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2068d9ae7f2bSJakub Kicinski } 2069d9ae7f2bSJakub Kicinski 2070e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2071d9ae7f2bSJakub Kicinski { 2072e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2073e663fe38SJakub Kicinski } 2074e663fe38SJakub Kicinski 2075e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2076e663fe38SJakub Kicinski { 2077e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2078e663fe38SJakub Kicinski } 2079e663fe38SJakub Kicinski 2080e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2081e663fe38SJakub Kicinski { 2082e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2083e663fe38SJakub Kicinski } 2084e663fe38SJakub Kicinski 2085e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2086e663fe38SJakub Kicinski { 2087e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2088e663fe38SJakub Kicinski } 2089e663fe38SJakub Kicinski 2090e663fe38SJakub Kicinski static int 2091e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2092e663fe38SJakub Kicinski unsigned int size) 2093e663fe38SJakub Kicinski { 2094e663fe38SJakub Kicinski swreg off_reg; 2095e663fe38SJakub Kicinski 2096e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2097e663fe38SJakub Kicinski 2098e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2099e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2100e663fe38SJakub Kicinski } 2101e663fe38SJakub Kicinski 2102e663fe38SJakub Kicinski static int 2103ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2104d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2105ee9133a8SJakub Kicinski { 2106d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2107b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2108b14157eeSJakub Kicinski false, wrp_lmem_store); 2109ee9133a8SJakub Kicinski } 2110ee9133a8SJakub Kicinski 2111ee9133a8SJakub Kicinski static int 2112e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2113e663fe38SJakub Kicinski unsigned int size) 2114e663fe38SJakub Kicinski { 2115e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2116e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2117e663fe38SJakub Kicinski 2118ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2119d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2120d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2121ee9133a8SJakub Kicinski 2122d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2123d9ae7f2bSJakub Kicinski } 2124d9ae7f2bSJakub Kicinski 2125e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2126e663fe38SJakub Kicinski { 2127e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2128e663fe38SJakub Kicinski } 2129e663fe38SJakub Kicinski 2130e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2131e663fe38SJakub Kicinski { 2132e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2133e663fe38SJakub Kicinski } 2134e663fe38SJakub Kicinski 2135d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2136d9ae7f2bSJakub Kicinski { 2137e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2138e663fe38SJakub Kicinski } 21392ca71441SJakub Kicinski 2140e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2141e663fe38SJakub Kicinski { 2142e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2143d9ae7f2bSJakub Kicinski } 2144d9ae7f2bSJakub Kicinski 2145dcb0c27fSJakub Kicinski static int 2146dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2147dcb0c27fSJakub Kicinski { 2148dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2149dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 215041aed09cSJakub Kicinski unsigned int full_add, out; 215141aed09cSJakub Kicinski swreg addra, addrb, off; 2152dcb0c27fSJakub Kicinski 2153dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2154dcb0c27fSJakub Kicinski 215541aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 215641aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 215741aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 215841aed09cSJakub Kicinski * code for both. 215941aed09cSJakub Kicinski */ 216041aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 216141aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 216241aed09cSJakub Kicinski 216341aed09cSJakub Kicinski if (meta->insn.off) { 216441aed09cSJakub Kicinski out += 2; 216541aed09cSJakub Kicinski full_add += 2; 216641aed09cSJakub Kicinski } 216741aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 216841aed09cSJakub Kicinski out += 3; 216941aed09cSJakub Kicinski full_add += 3; 217041aed09cSJakub Kicinski } 217141aed09cSJakub Kicinski if (meta->xadd_over_16bit) 217241aed09cSJakub Kicinski out += 2 + is64; 217341aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 217441aed09cSJakub Kicinski out += 5; 217541aed09cSJakub Kicinski full_add += 5; 217641aed09cSJakub Kicinski } 217741aed09cSJakub Kicinski 217841aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 217941aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 218041aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 218141aed09cSJakub Kicinski 218241aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 218341aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 218441aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 218541aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 218641aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 218741aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 218841aed09cSJakub Kicinski /* defer for add */ 218941aed09cSJakub Kicinski } 219041aed09cSJakub Kicinski 2191dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2192dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2193dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2194dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2195dcb0c27fSJakub Kicinski } else { 2196dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2197dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2198dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2199dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2200dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2201dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2202dcb0c27fSJakub Kicinski } 2203dcb0c27fSJakub Kicinski 220441aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 220541aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 220641aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 220741aed09cSJakub Kicinski 2208dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2209dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2210dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2211dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2212dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2213dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2214b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2215dcb0c27fSJakub Kicinski 221641aed09cSJakub Kicinski if (meta->xadd_over_16bit) 221741aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 221841aed09cSJakub Kicinski } 221941aed09cSJakub Kicinski 222041aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 222141aed09cSJakub Kicinski return -EINVAL; 222241aed09cSJakub Kicinski 222341aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 222441aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 222541aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 222641aed09cSJakub Kicinski addra, addrb, is64 << 2, 222741aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 222841aed09cSJakub Kicinski 222941aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 223041aed09cSJakub Kicinski if (is64) 223141aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 223241aed09cSJakub Kicinski } 223341aed09cSJakub Kicinski 223441aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 223541aed09cSJakub Kicinski return -EINVAL; 223641aed09cSJakub Kicinski 2237dcb0c27fSJakub Kicinski return 0; 2238dcb0c27fSJakub Kicinski } 2239dcb0c27fSJakub Kicinski 2240dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2241dcb0c27fSJakub Kicinski { 2242dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2243dcb0c27fSJakub Kicinski } 2244dcb0c27fSJakub Kicinski 2245dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2246dcb0c27fSJakub Kicinski { 2247dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2248dcb0c27fSJakub Kicinski } 2249dcb0c27fSJakub Kicinski 2250d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2251d9ae7f2bSJakub Kicinski { 2252d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2253d9ae7f2bSJakub Kicinski 2254d9ae7f2bSJakub Kicinski return 0; 2255d9ae7f2bSJakub Kicinski } 2256d9ae7f2bSJakub Kicinski 2257d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2258d9ae7f2bSJakub Kicinski { 2259d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2260d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2261b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2262b3f868dfSJakub Kicinski 2263b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2264b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2265d9ae7f2bSJakub Kicinski 2266d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2267d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2268d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2269d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2270d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2271d9ae7f2bSJakub Kicinski } 2272d9ae7f2bSJakub Kicinski 2273d9ae7f2bSJakub Kicinski if (imm >> 32) { 2274d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2275d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2276d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2277d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2278d9ae7f2bSJakub Kicinski } 2279d9ae7f2bSJakub Kicinski 2280d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2281d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2282d9ae7f2bSJakub Kicinski 2283d9ae7f2bSJakub Kicinski return 0; 2284d9ae7f2bSJakub Kicinski } 2285d9ae7f2bSJakub Kicinski 2286d9ae7f2bSJakub Kicinski static int jgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2287d9ae7f2bSJakub Kicinski { 228826fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true); 2289d9ae7f2bSJakub Kicinski } 2290d9ae7f2bSJakub Kicinski 2291d9ae7f2bSJakub Kicinski static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2292d9ae7f2bSJakub Kicinski { 229326fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false); 2294d9ae7f2bSJakub Kicinski } 2295d9ae7f2bSJakub Kicinski 22965dd294d4SDaniel Borkmann static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22975dd294d4SDaniel Borkmann { 229826fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, false); 22995dd294d4SDaniel Borkmann } 23005dd294d4SDaniel Borkmann 23015dd294d4SDaniel Borkmann static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23025dd294d4SDaniel Borkmann { 230326fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); 23045dd294d4SDaniel Borkmann } 23055dd294d4SDaniel Borkmann 2306c087aa8bSNic Viljoen static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2307c087aa8bSNic Viljoen { 2308c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true); 2309c087aa8bSNic Viljoen } 2310c087aa8bSNic Viljoen 2311c087aa8bSNic Viljoen static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2312c087aa8bSNic Viljoen { 2313c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false); 2314c087aa8bSNic Viljoen } 2315c087aa8bSNic Viljoen 2316c087aa8bSNic Viljoen static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2317c087aa8bSNic Viljoen { 2318c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false); 2319c087aa8bSNic Viljoen } 2320c087aa8bSNic Viljoen 2321c087aa8bSNic Viljoen static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2322c087aa8bSNic Viljoen { 2323c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true); 2324c087aa8bSNic Viljoen } 2325c087aa8bSNic Viljoen 2326d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2327d9ae7f2bSJakub Kicinski { 2328d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2329d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2330b3f868dfSJakub Kicinski swreg tmp_reg; 2331d9ae7f2bSJakub Kicinski 2332d9ae7f2bSJakub Kicinski if (!imm) { 2333d9ae7f2bSJakub Kicinski meta->skip = true; 2334d9ae7f2bSJakub Kicinski return 0; 2335d9ae7f2bSJakub Kicinski } 2336d9ae7f2bSJakub Kicinski 2337d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2338d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2339d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2340d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2341d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2342d9ae7f2bSJakub Kicinski } 2343d9ae7f2bSJakub Kicinski 2344d9ae7f2bSJakub Kicinski if (imm >> 32) { 2345d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2346d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2347d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2348d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2349d9ae7f2bSJakub Kicinski } 2350d9ae7f2bSJakub Kicinski 2351d9ae7f2bSJakub Kicinski return 0; 2352d9ae7f2bSJakub Kicinski } 2353d9ae7f2bSJakub Kicinski 2354d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2355d9ae7f2bSJakub Kicinski { 2356d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2357d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2358b3f868dfSJakub Kicinski swreg tmp_reg; 2359d9ae7f2bSJakub Kicinski 2360d9ae7f2bSJakub Kicinski if (!imm) { 2361d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2362d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2363d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 236482837370SJakub Kicinski return 0; 2365d9ae7f2bSJakub Kicinski } 2366d9ae7f2bSJakub Kicinski 2367d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2368d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2369d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2370d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2371d9ae7f2bSJakub Kicinski 2372d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2373d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2374d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2375d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2376d9ae7f2bSJakub Kicinski 2377d9ae7f2bSJakub Kicinski return 0; 2378d9ae7f2bSJakub Kicinski } 2379d9ae7f2bSJakub Kicinski 2380d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2381d9ae7f2bSJakub Kicinski { 2382d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2383d9ae7f2bSJakub Kicinski 2384d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2385d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2386d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2387d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2388d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2389d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2390d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2391d9ae7f2bSJakub Kicinski 2392d9ae7f2bSJakub Kicinski return 0; 2393d9ae7f2bSJakub Kicinski } 2394d9ae7f2bSJakub Kicinski 2395d9ae7f2bSJakub Kicinski static int jgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2396d9ae7f2bSJakub Kicinski { 239726fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true); 2398d9ae7f2bSJakub Kicinski } 2399d9ae7f2bSJakub Kicinski 2400d9ae7f2bSJakub Kicinski static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2401d9ae7f2bSJakub Kicinski { 240226fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false); 2403d9ae7f2bSJakub Kicinski } 2404d9ae7f2bSJakub Kicinski 24055dd294d4SDaniel Borkmann static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24065dd294d4SDaniel Borkmann { 240726fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, false); 24085dd294d4SDaniel Borkmann } 24095dd294d4SDaniel Borkmann 24105dd294d4SDaniel Borkmann static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24115dd294d4SDaniel Borkmann { 241226fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); 24135dd294d4SDaniel Borkmann } 24145dd294d4SDaniel Borkmann 2415c087aa8bSNic Viljoen static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2416c087aa8bSNic Viljoen { 2417c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true); 2418c087aa8bSNic Viljoen } 2419c087aa8bSNic Viljoen 2420c087aa8bSNic Viljoen static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2421c087aa8bSNic Viljoen { 2422c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false); 2423c087aa8bSNic Viljoen } 2424c087aa8bSNic Viljoen 2425c087aa8bSNic Viljoen static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2426c087aa8bSNic Viljoen { 2427c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false); 2428c087aa8bSNic Viljoen } 2429c087aa8bSNic Viljoen 2430c087aa8bSNic Viljoen static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2431c087aa8bSNic Viljoen { 2432c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, true); 2433c087aa8bSNic Viljoen } 2434c087aa8bSNic Viljoen 2435d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2436d9ae7f2bSJakub Kicinski { 2437d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2438d9ae7f2bSJakub Kicinski } 2439d9ae7f2bSJakub Kicinski 2440d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2441d9ae7f2bSJakub Kicinski { 2442d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2443d9ae7f2bSJakub Kicinski } 2444d9ae7f2bSJakub Kicinski 24452cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24462cb230bdSJakub Kicinski { 24472cb230bdSJakub Kicinski switch (meta->insn.imm) { 24480d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 24490d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 245077a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 245144d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 2452bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 2453fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 2454df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 2455df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 24562cb230bdSJakub Kicinski default: 24572cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 24582cb230bdSJakub Kicinski return -EOPNOTSUPP; 24592cb230bdSJakub Kicinski } 24602cb230bdSJakub Kicinski } 24612cb230bdSJakub Kicinski 2462d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2463d9ae7f2bSJakub Kicinski { 2464e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2465d9ae7f2bSJakub Kicinski 2466d9ae7f2bSJakub Kicinski return 0; 2467d9ae7f2bSJakub Kicinski } 2468d9ae7f2bSJakub Kicinski 2469d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2470d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2471d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2472d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2473d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2474d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2475d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2476d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2477d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2478d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2479d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2480d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2481d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2482254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2483d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2484d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2485d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2486d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2487d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2488d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2489d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2490d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2491d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2492d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2493d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2494d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2495d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2496d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2497254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2498d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 24993119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2500d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2501d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2502d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2503d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2504d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2505d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2506d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 25072ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 25082ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2509d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 25102ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2511e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2512e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2513d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2514e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2515dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 2516dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 2517e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2518e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2519e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2520e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2521d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2522d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 2523d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = jgt_imm, 2524d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, 25255dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, 25265dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, 2527c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_K] = jsgt_imm, 2528c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_K] = jsge_imm, 2529c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_K] = jslt_imm, 2530c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_K] = jsle_imm, 2531d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2532d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2533d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 2534d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = jgt_reg, 2535d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, 25365dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, 25375dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, 2538c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_X] = jsgt_reg, 2539c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_X] = jsge_reg, 2540c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_X] = jslt_reg, 2541c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_X] = jsle_reg, 2542d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2543d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 25442cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2545d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2546d9ae7f2bSJakub Kicinski }; 2547d9ae7f2bSJakub Kicinski 2548d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2549d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2550d9ae7f2bSJakub Kicinski { 25515b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2552854dc87dSJiong Wang u32 idx, br_idx; 2553d9ae7f2bSJakub Kicinski 2554854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2555d9ae7f2bSJakub Kicinski if (meta->skip) 2556d9ae7f2bSJakub Kicinski continue; 25572cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 25582cb230bdSJakub Kicinski continue; 2559d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2560d9ae7f2bSJakub Kicinski continue; 2561d9ae7f2bSJakub Kicinski 25625b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 25632314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 25645b674140SJiong Wang else 25652314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2566854dc87dSJiong Wang 2567d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2568d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2569d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2570d9ae7f2bSJakub Kicinski return -ELOOP; 2571d9ae7f2bSJakub Kicinski } 2572d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 25732314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 25742314fe9eSJakub Kicinski RELO_BR_REL) 2575d9ae7f2bSJakub Kicinski continue; 2576d9ae7f2bSJakub Kicinski 25775b674140SJiong Wang if (!meta->jmp_dst) { 25785b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2579d9ae7f2bSJakub Kicinski return -ELOOP; 2580d9ae7f2bSJakub Kicinski } 2581d9ae7f2bSJakub Kicinski 25825b674140SJiong Wang jmp_dst = meta->jmp_dst; 2583854dc87dSJiong Wang 25845b674140SJiong Wang if (jmp_dst->skip) { 2585d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2586d9ae7f2bSJakub Kicinski return -ELOOP; 2587d9ae7f2bSJakub Kicinski } 2588d9ae7f2bSJakub Kicinski 25892314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2590d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2591d9ae7f2bSJakub Kicinski continue; 25925b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2593d9ae7f2bSJakub Kicinski } 2594d9ae7f2bSJakub Kicinski } 2595d9ae7f2bSJakub Kicinski 2596d9ae7f2bSJakub Kicinski return 0; 2597d9ae7f2bSJakub Kicinski } 2598d9ae7f2bSJakub Kicinski 2599d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2600d9ae7f2bSJakub Kicinski { 260118e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 260218e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 260318e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2604d9ae7f2bSJakub Kicinski } 2605d9ae7f2bSJakub Kicinski 2606d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2607d9ae7f2bSJakub Kicinski { 2608d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2609d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2610d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2611d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2612d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2613d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2614d9ae7f2bSJakub Kicinski * 2615d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2616d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2617d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2618d9ae7f2bSJakub Kicinski * packets up the stack. 2619d9ae7f2bSJakub Kicinski */ 2620d9ae7f2bSJakub Kicinski /* Target for aborts */ 2621d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2622d9ae7f2bSJakub Kicinski 2623e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2624d9ae7f2bSJakub Kicinski 2625c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2626d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2627d9ae7f2bSJakub Kicinski 2628d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2629d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2630d9ae7f2bSJakub Kicinski 2631d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2632d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2633d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2634c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2635d9ae7f2bSJakub Kicinski 2636d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2637d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2638d9ae7f2bSJakub Kicinski 2639d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2640d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2641d9ae7f2bSJakub Kicinski 2642d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2643d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2644d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2645d9ae7f2bSJakub Kicinski 2646d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2647d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2648d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2649d9ae7f2bSJakub Kicinski 2650e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2651d9ae7f2bSJakub Kicinski 2652d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2653d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2654d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2655d9ae7f2bSJakub Kicinski } 2656d9ae7f2bSJakub Kicinski 2657d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2658d9ae7f2bSJakub Kicinski { 2659d9ae7f2bSJakub Kicinski /* XDP return codes: 2660d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2661d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2662d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2663d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2664d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2665d9ae7f2bSJakub Kicinski */ 2666d9ae7f2bSJakub Kicinski /* Target for aborts */ 2667d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2668d9ae7f2bSJakub Kicinski 2669e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2670d9ae7f2bSJakub Kicinski 2671c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2672d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2673d9ae7f2bSJakub Kicinski 2674d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2675d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2676d9ae7f2bSJakub Kicinski 2677d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2678d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2679d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2680d9ae7f2bSJakub Kicinski 2681d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2682d9ae7f2bSJakub Kicinski 2683d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2684d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2685d9ae7f2bSJakub Kicinski 2686d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2687d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2688d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2689d9ae7f2bSJakub Kicinski 2690e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2691d9ae7f2bSJakub Kicinski 2692c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2693d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2694d9ae7f2bSJakub Kicinski } 2695d9ae7f2bSJakub Kicinski 2696d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2697d9ae7f2bSJakub Kicinski { 2698012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2699012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2700d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2701d9ae7f2bSJakub Kicinski break; 2702012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2703d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2704d9ae7f2bSJakub Kicinski break; 2705012bb8a8SJakub Kicinski default: 2706012bb8a8SJakub Kicinski WARN_ON(1); 2707d9ae7f2bSJakub Kicinski } 2708d9ae7f2bSJakub Kicinski } 2709d9ae7f2bSJakub Kicinski 2710d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2711d9ae7f2bSJakub Kicinski { 2712d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2713ff42bb9fSJakub Kicinski int err; 2714d9ae7f2bSJakub Kicinski 2715d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2716d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2717d9ae7f2bSJakub Kicinski return nfp_prog->error; 2718d9ae7f2bSJakub Kicinski 2719d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2720d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2721d9ae7f2bSJakub Kicinski 2722d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2723d9ae7f2bSJakub Kicinski 2724d9ae7f2bSJakub Kicinski if (meta->skip) { 2725d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2726d9ae7f2bSJakub Kicinski continue; 2727d9ae7f2bSJakub Kicinski } 2728d9ae7f2bSJakub Kicinski 2729d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2730d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2731d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2732d9ae7f2bSJakub Kicinski if (!cb) 2733d9ae7f2bSJakub Kicinski return -ENOENT; 2734d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2735d9ae7f2bSJakub Kicinski if (err) 2736d9ae7f2bSJakub Kicinski return err; 2737e8a4796eSJakub Kicinski if (nfp_prog->error) 2738e8a4796eSJakub Kicinski return nfp_prog->error; 2739d9ae7f2bSJakub Kicinski 2740d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2741d9ae7f2bSJakub Kicinski } 2742d9ae7f2bSJakub Kicinski 2743854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 2744854dc87dSJiong Wang 2745d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 2746d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2747d9ae7f2bSJakub Kicinski return nfp_prog->error; 2748d9ae7f2bSJakub Kicinski 2749ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 27501c03e03fSJakub Kicinski if (nfp_prog->error) 27511c03e03fSJakub Kicinski return nfp_prog->error; 27521c03e03fSJakub Kicinski 2753d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 2754d9ae7f2bSJakub Kicinski } 2755d9ae7f2bSJakub Kicinski 2756d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 2757d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 2758d9ae7f2bSJakub Kicinski { 2759d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2760d9ae7f2bSJakub Kicinski 2761d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2762d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 2763d9ae7f2bSJakub Kicinski 2764d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 2765d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 2766d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 2767d9ae7f2bSJakub Kicinski continue; 2768d9ae7f2bSJakub Kicinski 2769d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 2770d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 2771d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 2772d9ae7f2bSJakub Kicinski meta->skip = true; 2773d9ae7f2bSJakub Kicinski 2774d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 2775d9ae7f2bSJakub Kicinski if (!meta->skip) 2776d9ae7f2bSJakub Kicinski return; 2777d9ae7f2bSJakub Kicinski } 2778d9ae7f2bSJakub Kicinski } 2779d9ae7f2bSJakub Kicinski 27806c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 27816c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 27826c59500cSJakub Kicinski */ 27836c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 27846c59500cSJakub Kicinski { 27856c59500cSJakub Kicinski struct nfp_insn_meta *meta; 27866c59500cSJakub Kicinski 27876c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 27886c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 27896c59500cSJakub Kicinski 27906c59500cSJakub Kicinski if (meta->skip) 27916c59500cSJakub Kicinski continue; 27926c59500cSJakub Kicinski 27936c59500cSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_ALU && 27946c59500cSJakub Kicinski BPF_CLASS(insn.code) != BPF_ALU64) 27956c59500cSJakub Kicinski continue; 27966c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 27976c59500cSJakub Kicinski continue; 27986c59500cSJakub Kicinski if (insn.imm >= 0) 27996c59500cSJakub Kicinski continue; 28006c59500cSJakub Kicinski 28016c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 28026c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 28036c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 28046c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 28056c59500cSJakub Kicinski else 28066c59500cSJakub Kicinski continue; 28076c59500cSJakub Kicinski 28086c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 28096c59500cSJakub Kicinski 28106c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 28116c59500cSJakub Kicinski } 28126c59500cSJakub Kicinski } 28136c59500cSJakub Kicinski 2814d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 2815d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 2816d9ae7f2bSJakub Kicinski { 2817d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 2818d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 2819d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 2820d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 2821d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 2822d9ae7f2bSJakub Kicinski }; 2823d9ae7f2bSJakub Kicinski 2824d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 2825d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 2826d9ae7f2bSJakub Kicinski 2827d9ae7f2bSJakub Kicinski insn = meta1->insn; 2828d9ae7f2bSJakub Kicinski next = meta2->insn; 2829d9ae7f2bSJakub Kicinski 2830d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2831d9ae7f2bSJakub Kicinski continue; 2832d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2833d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2834d9ae7f2bSJakub Kicinski continue; 2835d9ae7f2bSJakub Kicinski 2836d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 2837d9ae7f2bSJakub Kicinski continue; 2838d9ae7f2bSJakub Kicinski 2839d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 2840d9ae7f2bSJakub Kicinski continue; 2841d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 2842d9ae7f2bSJakub Kicinski continue; 2843d9ae7f2bSJakub Kicinski 2844d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 2845d9ae7f2bSJakub Kicinski continue; 2846d9ae7f2bSJakub Kicinski 28471266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 28481266f5d6SJiong Wang continue; 28491266f5d6SJiong Wang 2850d9ae7f2bSJakub Kicinski meta2->skip = true; 2851d9ae7f2bSJakub Kicinski } 2852d9ae7f2bSJakub Kicinski } 2853d9ae7f2bSJakub Kicinski 2854d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 2855d9ae7f2bSJakub Kicinski { 2856d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 2857d9ae7f2bSJakub Kicinski 2858d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 2859d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 2860d9ae7f2bSJakub Kicinski 2861d9ae7f2bSJakub Kicinski insn = meta1->insn; 2862d9ae7f2bSJakub Kicinski next1 = meta2->insn; 2863d9ae7f2bSJakub Kicinski next2 = meta3->insn; 2864d9ae7f2bSJakub Kicinski 2865d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2866d9ae7f2bSJakub Kicinski continue; 2867d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2868d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2869d9ae7f2bSJakub Kicinski continue; 2870d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 2871d9ae7f2bSJakub Kicinski continue; 2872d9ae7f2bSJakub Kicinski 2873d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 2874d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 2875d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 2876d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 2877d9ae7f2bSJakub Kicinski continue; 2878d9ae7f2bSJakub Kicinski 2879d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 2880d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 2881d9ae7f2bSJakub Kicinski continue; 2882d9ae7f2bSJakub Kicinski 2883d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 2884d9ae7f2bSJakub Kicinski continue; 2885d9ae7f2bSJakub Kicinski 288629fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 288729fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 288829fe46efSJiong Wang continue; 288929fe46efSJiong Wang 2890d9ae7f2bSJakub Kicinski meta2->skip = true; 2891d9ae7f2bSJakub Kicinski meta3->skip = true; 2892d9ae7f2bSJakub Kicinski } 2893d9ae7f2bSJakub Kicinski } 2894d9ae7f2bSJakub Kicinski 28956bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 28966bc7103cSJiong Wang * 28976bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 28986bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 28996bc7103cSJiong Wang * 29006bc7103cSJiong Wang * The destination register of load and source register of store should 29016bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 29026bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 29036bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 29046bc7103cSJiong Wang */ 29056bc7103cSJiong Wang static bool 29066bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 29076bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 29086bc7103cSJiong Wang { 29096bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 29106bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 29116bc7103cSJiong Wang 29126bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 29136bc7103cSJiong Wang return false; 29146bc7103cSJiong Wang 29156bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 29166bc7103cSJiong Wang return false; 29176bc7103cSJiong Wang 29186bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 29196bc7103cSJiong Wang return false; 29206bc7103cSJiong Wang 29216bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 29226bc7103cSJiong Wang return false; 29236bc7103cSJiong Wang 29246bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 29256bc7103cSJiong Wang return false; 29266bc7103cSJiong Wang 29276bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 29286bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 29296bc7103cSJiong Wang return false; 29306bc7103cSJiong Wang 29316bc7103cSJiong Wang return true; 29326bc7103cSJiong Wang } 29336bc7103cSJiong Wang 29346bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 29356bc7103cSJiong Wang * 29366bc7103cSJiong Wang * - Their address base registers are the same. 29376bc7103cSJiong Wang * - Their address offsets are in the same order. 29386bc7103cSJiong Wang * - They operate at the same memory width. 29396bc7103cSJiong Wang * - There is no jump into the middle of them. 29406bc7103cSJiong Wang */ 29416bc7103cSJiong Wang static bool 29426bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 29436bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 29446bc7103cSJiong Wang struct bpf_insn *prev_ld, 29456bc7103cSJiong Wang struct bpf_insn *prev_st) 29466bc7103cSJiong Wang { 29476bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 29486bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 29496bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 29506bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 29516bc7103cSJiong Wang 29526bc7103cSJiong Wang /* This pair is the start pair. */ 29536bc7103cSJiong Wang if (!prev_ld) 29546bc7103cSJiong Wang return true; 29556bc7103cSJiong Wang 29566bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 29576bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 29586bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 29596bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 29606bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 29616bc7103cSJiong Wang prev_ld_off = prev_ld->off; 29626bc7103cSJiong Wang prev_st_off = prev_st->off; 29636bc7103cSJiong Wang 29646bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 29656bc7103cSJiong Wang return false; 29666bc7103cSJiong Wang 29676bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 29686bc7103cSJiong Wang return false; 29696bc7103cSJiong Wang 29706bc7103cSJiong Wang if (curr_size != prev_size) 29716bc7103cSJiong Wang return false; 29726bc7103cSJiong Wang 29736bc7103cSJiong Wang /* There is jump to the head of this pair. */ 29746bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 29756bc7103cSJiong Wang return false; 29766bc7103cSJiong Wang 29776bc7103cSJiong Wang /* Both in ascending order. */ 29786bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 29796bc7103cSJiong Wang prev_st_off + prev_size == st->off) 29806bc7103cSJiong Wang return true; 29816bc7103cSJiong Wang 29826bc7103cSJiong Wang /* Both in descending order. */ 29836bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 29846bc7103cSJiong Wang st->off + curr_size == prev_st_off) 29856bc7103cSJiong Wang return true; 29866bc7103cSJiong Wang 29876bc7103cSJiong Wang return false; 29886bc7103cSJiong Wang } 29896bc7103cSJiong Wang 29906bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 29916bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 29926bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 29936bc7103cSJiong Wang * as an memory copy. 29946bc7103cSJiong Wang */ 29956bc7103cSJiong Wang static bool 29966bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 29976bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 29986bc7103cSJiong Wang { 29996bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 30006bc7103cSJiong Wang 30016bc7103cSJiong Wang /* Different pointer types does not overlap. */ 30026bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 30036bc7103cSJiong Wang return false; 30046bc7103cSJiong Wang 30056bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 30066bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 30076bc7103cSJiong Wang return true; 30086bc7103cSJiong Wang 30096bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 30106bc7103cSJiong Wang * base register. 30116bc7103cSJiong Wang */ 30126bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 30136bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 30146bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 30156bc7103cSJiong Wang 30166bc7103cSJiong Wang /* Ascending order cross. */ 30176bc7103cSJiong Wang if (ld_off > head_ld_off && 30186bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 30196bc7103cSJiong Wang return true; 30206bc7103cSJiong Wang 30216bc7103cSJiong Wang /* Descending order cross. */ 30226bc7103cSJiong Wang if (ld_off < head_ld_off && 30236bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 30246bc7103cSJiong Wang return true; 30256bc7103cSJiong Wang 30266bc7103cSJiong Wang return false; 30276bc7103cSJiong Wang } 30286bc7103cSJiong Wang 30296bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 30306bc7103cSJiong Wang * 30316bc7103cSJiong Wang * load R, [regA + offA] 30326bc7103cSJiong Wang * store [regB + offB], R 30336bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 30346bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 30356bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 30366bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 30376bc7103cSJiong Wang * ... 30386bc7103cSJiong Wang * 30396bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 30406bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 30416bc7103cSJiong Wang */ 30426bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 30436bc7103cSJiong Wang { 30446bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 30456bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 30466bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 30476bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 30486bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 30496bc7103cSJiong Wang u8 count = 0; 30506bc7103cSJiong Wang 30516bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 30526bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 30536bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 30546bc7103cSJiong Wang 30556bc7103cSJiong Wang /* Reset record status if any of the following if true: 30566bc7103cSJiong Wang * - The current insn pair is not load/store. 30576bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 30586bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 30596bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 30606bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 30616bc7103cSJiong Wang * single NFP CPP command can transfer. 30626bc7103cSJiong Wang */ 30636bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 30646bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 30656bc7103cSJiong Wang prev_st) || 30666bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 30676bc7103cSJiong Wang head_st_meta) || 30686bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 30696bc7103cSJiong Wang if (!count) 30706bc7103cSJiong Wang continue; 30716bc7103cSJiong Wang 30726bc7103cSJiong Wang if (count > 1) { 30736bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 30746bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 30756bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 30766bc7103cSJiong Wang 30776bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 30786bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 30796bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 30806bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 30816bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 30826bc7103cSJiong Wang } 30836bc7103cSJiong Wang 30846bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 30856bc7103cSJiong Wang head_st_meta->skip = true; 30866bc7103cSJiong Wang } else { 30876bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 30886bc7103cSJiong Wang } 30896bc7103cSJiong Wang 30906bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 30916bc7103cSJiong Wang * could serve as the new head of the the next chain. 30926bc7103cSJiong Wang */ 30936bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 30946bc7103cSJiong Wang head_ld_meta = meta1; 30956bc7103cSJiong Wang head_st_meta = meta2; 30966bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 30976bc7103cSJiong Wang BPF_LDST_BYTES(ld); 30986bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 30996bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 31006bc7103cSJiong Wang prev_ld = ld; 31016bc7103cSJiong Wang prev_st = st; 31026bc7103cSJiong Wang count = 1; 31036bc7103cSJiong Wang } else { 31046bc7103cSJiong Wang head_ld_meta = NULL; 31056bc7103cSJiong Wang head_st_meta = NULL; 31066bc7103cSJiong Wang prev_ld = NULL; 31076bc7103cSJiong Wang prev_st = NULL; 31086bc7103cSJiong Wang count = 0; 31096bc7103cSJiong Wang } 31106bc7103cSJiong Wang 31116bc7103cSJiong Wang continue; 31126bc7103cSJiong Wang } 31136bc7103cSJiong Wang 31146bc7103cSJiong Wang if (!head_ld_meta) { 31156bc7103cSJiong Wang head_ld_meta = meta1; 31166bc7103cSJiong Wang head_st_meta = meta2; 31176bc7103cSJiong Wang } else { 31186bc7103cSJiong Wang meta1->skip = true; 31196bc7103cSJiong Wang meta2->skip = true; 31206bc7103cSJiong Wang } 31216bc7103cSJiong Wang 31226bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 31236bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 31246bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 31256bc7103cSJiong Wang prev_ld = ld; 31266bc7103cSJiong Wang prev_st = st; 31276bc7103cSJiong Wang count++; 31286bc7103cSJiong Wang } 31296bc7103cSJiong Wang } 31306bc7103cSJiong Wang 313187b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 313287b10ecdSJiong Wang { 313387b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 313487b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 313587b10ecdSJiong Wang bool cache_avail = false; 313687b10ecdSJiong Wang struct bpf_insn *insn; 313787b10ecdSJiong Wang s32 range_ptr_off = 0; 313887b10ecdSJiong Wang u32 range_ptr_id = 0; 313987b10ecdSJiong Wang 314087b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 314187b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 314287b10ecdSJiong Wang cache_avail = false; 314387b10ecdSJiong Wang 314487b10ecdSJiong Wang if (meta->skip) 314587b10ecdSJiong Wang continue; 314687b10ecdSJiong Wang 314787b10ecdSJiong Wang insn = &meta->insn; 314887b10ecdSJiong Wang 314987b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 315087b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 315187b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 315287b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 315387b10ecdSJiong Wang cache_avail = false; 315487b10ecdSJiong Wang continue; 315587b10ecdSJiong Wang } 315687b10ecdSJiong Wang 315787b10ecdSJiong Wang if (!is_mbpf_load(meta)) 315887b10ecdSJiong Wang continue; 315987b10ecdSJiong Wang 316087b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 316187b10ecdSJiong Wang cache_avail = false; 316287b10ecdSJiong Wang continue; 316387b10ecdSJiong Wang } 316487b10ecdSJiong Wang 316587b10ecdSJiong Wang if (!cache_avail) { 316687b10ecdSJiong Wang cache_avail = true; 316787b10ecdSJiong Wang if (range_node) 316887b10ecdSJiong Wang goto end_current_then_start_new; 316987b10ecdSJiong Wang goto start_new; 317087b10ecdSJiong Wang } 317187b10ecdSJiong Wang 317287b10ecdSJiong Wang /* Check ID to make sure two reads share the same 317387b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 317487b10ecdSJiong Wang * to make sure they also share the same constant 317587b10ecdSJiong Wang * offset. 317687b10ecdSJiong Wang * 317787b10ecdSJiong Wang * OFFs don't really need to be the same, because they 317887b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 317987b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 318087b10ecdSJiong Wang * offsets against original packet pointer. We don't 318187b10ecdSJiong Wang * support this. 318287b10ecdSJiong Wang */ 318387b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 318487b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 318587b10ecdSJiong Wang s16 new_start = range_start; 318687b10ecdSJiong Wang s16 end, off = insn->off; 318787b10ecdSJiong Wang s16 new_end = range_end; 318887b10ecdSJiong Wang bool changed = false; 318987b10ecdSJiong Wang 319087b10ecdSJiong Wang if (off < range_start) { 319187b10ecdSJiong Wang new_start = off; 319287b10ecdSJiong Wang changed = true; 319387b10ecdSJiong Wang } 319487b10ecdSJiong Wang 319587b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 319687b10ecdSJiong Wang if (end > range_end) { 319787b10ecdSJiong Wang new_end = end; 319887b10ecdSJiong Wang changed = true; 319987b10ecdSJiong Wang } 320087b10ecdSJiong Wang 320187b10ecdSJiong Wang if (!changed) 320287b10ecdSJiong Wang continue; 320387b10ecdSJiong Wang 320487b10ecdSJiong Wang if (new_end - new_start <= 64) { 320587b10ecdSJiong Wang /* Install new range. */ 320687b10ecdSJiong Wang range_start = new_start; 320787b10ecdSJiong Wang range_end = new_end; 320887b10ecdSJiong Wang continue; 320987b10ecdSJiong Wang } 321087b10ecdSJiong Wang } 321187b10ecdSJiong Wang 321287b10ecdSJiong Wang end_current_then_start_new: 321387b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 321487b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 321587b10ecdSJiong Wang start_new: 321687b10ecdSJiong Wang range_node = meta; 321787b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 321887b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 321987b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 322087b10ecdSJiong Wang range_start = insn->off; 322187b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 322287b10ecdSJiong Wang } 322387b10ecdSJiong Wang 322487b10ecdSJiong Wang if (range_node) { 322587b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 322687b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 322787b10ecdSJiong Wang } 322887b10ecdSJiong Wang 322987b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 323087b10ecdSJiong Wang if (meta->skip) 323187b10ecdSJiong Wang continue; 323287b10ecdSJiong Wang 323387b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 323487b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 323587b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 323687b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 323787b10ecdSJiong Wang } else { 323887b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 323987b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 324087b10ecdSJiong Wang } 324187b10ecdSJiong Wang } 324287b10ecdSJiong Wang } 324387b10ecdSJiong Wang } 324487b10ecdSJiong Wang 3245d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 3246d9ae7f2bSJakub Kicinski { 3247d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 3248d9ae7f2bSJakub Kicinski 32496c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 3250d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 3251d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 32526bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 325387b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 3254d9ae7f2bSJakub Kicinski 3255d9ae7f2bSJakub Kicinski return 0; 3256d9ae7f2bSJakub Kicinski } 3257d9ae7f2bSJakub Kicinski 32582314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 3259fd068ddcSJakub Kicinski { 32602314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 3261fd068ddcSJakub Kicinski int i; 3262fd068ddcSJakub Kicinski 32632314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 3264fd068ddcSJakub Kicinski int err; 3265fd068ddcSJakub Kicinski 32662314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 3267fd068ddcSJakub Kicinski if (err) 3268fd068ddcSJakub Kicinski return err; 3269fd068ddcSJakub Kicinski 32702314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 3271fd068ddcSJakub Kicinski } 3272fd068ddcSJakub Kicinski 3273fd068ddcSJakub Kicinski return 0; 3274fd068ddcSJakub Kicinski } 3275fd068ddcSJakub Kicinski 327644a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 327744a12eccSJakub Kicinski { 327844a12eccSJakub Kicinski void *prog; 327944a12eccSJakub Kicinski 328044a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 328144a12eccSJakub Kicinski if (!prog) 328244a12eccSJakub Kicinski return; 328344a12eccSJakub Kicinski 328444a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 328544a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 328644a12eccSJakub Kicinski kvfree(nfp_prog->prog); 328744a12eccSJakub Kicinski nfp_prog->prog = prog; 328844a12eccSJakub Kicinski } 328944a12eccSJakub Kicinski 3290c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3291d9ae7f2bSJakub Kicinski { 3292d9ae7f2bSJakub Kicinski int ret; 3293d9ae7f2bSJakub Kicinski 3294d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 3295d9ae7f2bSJakub Kicinski if (ret) 32969314c442SJakub Kicinski return ret; 3297d9ae7f2bSJakub Kicinski 3298d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 3299d9ae7f2bSJakub Kicinski if (ret) { 3300d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 3301d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 33029314c442SJakub Kicinski return -EINVAL; 3303d9ae7f2bSJakub Kicinski } 3304d9ae7f2bSJakub Kicinski 330544a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 330644a12eccSJakub Kicinski 33072314fe9eSJakub Kicinski return ret; 3308d9ae7f2bSJakub Kicinski } 33091549921dSJakub Kicinski 33101549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 33111549921dSJakub Kicinski { 33121549921dSJakub Kicinski struct nfp_insn_meta *meta; 33131549921dSJakub Kicinski 33141549921dSJakub Kicinski /* Another pass to record jump information. */ 33151549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 33161549921dSJakub Kicinski u64 code = meta->insn.code; 33171549921dSJakub Kicinski 33181549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 33191549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 33201549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 33211549921dSJakub Kicinski unsigned short dst_indx; 33221549921dSJakub Kicinski 33231549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 33241549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 33251549921dSJakub Kicinski cnt); 33261549921dSJakub Kicinski 33271549921dSJakub Kicinski meta->jmp_dst = dst_meta; 33281549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 33291549921dSJakub Kicinski } 33301549921dSJakub Kicinski } 33311549921dSJakub Kicinski } 33322314fe9eSJakub Kicinski 333374801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 333474801e50SQuentin Monnet { 333574801e50SQuentin Monnet return !!instr_cb[code]; 333674801e50SQuentin Monnet } 333774801e50SQuentin Monnet 33382314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 33392314fe9eSJakub Kicinski { 33402314fe9eSJakub Kicinski unsigned int i; 33412314fe9eSJakub Kicinski u64 *prog; 33422314fe9eSJakub Kicinski int err; 33432314fe9eSJakub Kicinski 33442314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 33452314fe9eSJakub Kicinski GFP_KERNEL); 33462314fe9eSJakub Kicinski if (!prog) 33472314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 33482314fe9eSJakub Kicinski 33492314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 33502314fe9eSJakub Kicinski enum nfp_relo_type special; 335177a3d311SJakub Kicinski u32 val; 33522314fe9eSJakub Kicinski 33532314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 33542314fe9eSJakub Kicinski switch (special) { 33552314fe9eSJakub Kicinski case RELO_NONE: 33562314fe9eSJakub Kicinski continue; 33572314fe9eSJakub Kicinski case RELO_BR_REL: 33582314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 33592314fe9eSJakub Kicinski break; 33602314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 33612314fe9eSJakub Kicinski br_set_offset(&prog[i], 33622314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 33632314fe9eSJakub Kicinski break; 33642314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 33652314fe9eSJakub Kicinski br_set_offset(&prog[i], 33662314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 33672314fe9eSJakub Kicinski break; 33682314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 33692314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 33702314fe9eSJakub Kicinski break; 337177a3d311SJakub Kicinski case RELO_BR_HELPER: 337277a3d311SJakub Kicinski val = br_get_offset(prog[i]); 337377a3d311SJakub Kicinski val -= BR_OFF_RELO; 337477a3d311SJakub Kicinski switch (val) { 337577a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 337677a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 337777a3d311SJakub Kicinski break; 337844d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 337944d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 338044d65a47SJakub Kicinski break; 3381bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3382bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 3383bfee64deSJakub Kicinski break; 338477a3d311SJakub Kicinski default: 338577a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 338677a3d311SJakub Kicinski val); 338777a3d311SJakub Kicinski err = -EINVAL; 338877a3d311SJakub Kicinski goto err_free_prog; 338977a3d311SJakub Kicinski } 339077a3d311SJakub Kicinski br_set_offset(&prog[i], val); 339177a3d311SJakub Kicinski break; 339277a3d311SJakub Kicinski case RELO_IMMED_REL: 339377a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 339477a3d311SJakub Kicinski break; 33952314fe9eSJakub Kicinski } 33962314fe9eSJakub Kicinski 33972314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 33982314fe9eSJakub Kicinski } 33992314fe9eSJakub Kicinski 34002314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 34012314fe9eSJakub Kicinski if (err) 34022314fe9eSJakub Kicinski goto err_free_prog; 34032314fe9eSJakub Kicinski 34042314fe9eSJakub Kicinski return prog; 34052314fe9eSJakub Kicinski 34062314fe9eSJakub Kicinski err_free_prog: 34072314fe9eSJakub Kicinski kfree(prog); 34082314fe9eSJakub Kicinski return ERR_PTR(err); 34092314fe9eSJakub Kicinski } 3410