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 { 77d9ae7f2bSJakub Kicinski if (nfp_prog->__prog_alloc_len == nfp_prog->prog_len) { 78d9ae7f2bSJakub Kicinski nfp_prog->error = -ENOSPC; 79d9ae7f2bSJakub Kicinski return; 80d9ae7f2bSJakub Kicinski } 81d9ae7f2bSJakub Kicinski 82d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len] = insn; 83d9ae7f2bSJakub Kicinski nfp_prog->prog_len++; 84d9ae7f2bSJakub Kicinski } 85d9ae7f2bSJakub Kicinski 86d9ae7f2bSJakub Kicinski static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) 87d9ae7f2bSJakub Kicinski { 882314fe9eSJakub Kicinski return nfp_prog->prog_len; 89d9ae7f2bSJakub Kicinski } 90d9ae7f2bSJakub Kicinski 910d49eaf4SJakub Kicinski static bool 920d49eaf4SJakub Kicinski nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off) 930d49eaf4SJakub Kicinski { 940d49eaf4SJakub Kicinski /* If there is a recorded error we may have dropped instructions; 950d49eaf4SJakub Kicinski * that doesn't have to be due to translator bug, and the translation 960d49eaf4SJakub Kicinski * will fail anyway, so just return OK. 970d49eaf4SJakub Kicinski */ 980d49eaf4SJakub Kicinski if (nfp_prog->error) 990d49eaf4SJakub Kicinski return true; 1000d49eaf4SJakub Kicinski return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off); 1010d49eaf4SJakub Kicinski } 1020d49eaf4SJakub Kicinski 103d9ae7f2bSJakub Kicinski /* --- Emitters --- */ 104d9ae7f2bSJakub Kicinski static void 105d9ae7f2bSJakub Kicinski __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 106b556ddd9SJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, enum cmd_ctx_swap ctx, 107b556ddd9SJakub Kicinski bool indir) 108d9ae7f2bSJakub Kicinski { 109d9ae7f2bSJakub Kicinski u64 insn; 110d9ae7f2bSJakub Kicinski 111d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 112d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 113d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 114d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 115d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 116d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 117b556ddd9SJakub Kicinski FIELD_PREP(OP_CMD_SIG, ctx != CMD_CTX_NO_SWAP) | 118d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 1195468a8b9SJakub Kicinski FIELD_PREP(OP_CMD_INDIR, indir) | 120d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 121d9ae7f2bSJakub Kicinski 122d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 123d9ae7f2bSJakub Kicinski } 124d9ae7f2bSJakub Kicinski 125d9ae7f2bSJakub Kicinski static void 1265468a8b9SJakub Kicinski emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 127b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx, bool indir) 128d9ae7f2bSJakub Kicinski { 129d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 130d9ae7f2bSJakub Kicinski int err; 131d9ae7f2bSJakub Kicinski 132d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 133d9ae7f2bSJakub Kicinski if (err) { 134d9ae7f2bSJakub Kicinski nfp_prog->error = err; 135d9ae7f2bSJakub Kicinski return; 136d9ae7f2bSJakub Kicinski } 137d9ae7f2bSJakub Kicinski if (reg.swap) { 138d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 139d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 140d9ae7f2bSJakub Kicinski return; 141d9ae7f2bSJakub Kicinski } 142995e101fSJakub Kicinski if (reg.dst_lmextn || reg.src_lmextn) { 143995e101fSJakub Kicinski pr_err("cmd can't use LMextn\n"); 144995e101fSJakub Kicinski nfp_prog->error = -EFAULT; 145995e101fSJakub Kicinski return; 146995e101fSJakub Kicinski } 147d9ae7f2bSJakub Kicinski 148b556ddd9SJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, ctx, 1495468a8b9SJakub Kicinski indir); 1505468a8b9SJakub Kicinski } 1515468a8b9SJakub Kicinski 1525468a8b9SJakub Kicinski static void 1535468a8b9SJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 154b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1555468a8b9SJakub Kicinski { 156b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, false); 157d9ae7f2bSJakub Kicinski } 158d9ae7f2bSJakub Kicinski 159d9ae7f2bSJakub Kicinski static void 1609879a381SJiong Wang emit_cmd_indir(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 161b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1629879a381SJiong Wang { 163b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, true); 1649879a381SJiong Wang } 1659879a381SJiong Wang 1669879a381SJiong Wang static void 167d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 168d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 169d9ae7f2bSJakub Kicinski { 170d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 171d9ae7f2bSJakub Kicinski u64 insn; 172d9ae7f2bSJakub Kicinski 173d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 174d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 175d9ae7f2bSJakub Kicinski 176d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 177d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 178d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 179d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 180d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 181d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 182d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 183d9ae7f2bSJakub Kicinski 184d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 185d9ae7f2bSJakub Kicinski } 186d9ae7f2bSJakub Kicinski 1872314fe9eSJakub Kicinski static void 1882314fe9eSJakub Kicinski emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, 1892314fe9eSJakub Kicinski enum nfp_relo_type relo) 190d9ae7f2bSJakub Kicinski { 1912314fe9eSJakub Kicinski if (mask == BR_UNC && defer > 2) { 192d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 193d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 194d9ae7f2bSJakub Kicinski return; 195d9ae7f2bSJakub Kicinski } 1962314fe9eSJakub Kicinski 1972314fe9eSJakub Kicinski __emit_br(nfp_prog, mask, 1982314fe9eSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 1992314fe9eSJakub Kicinski BR_CSS_NONE, addr, defer); 2002314fe9eSJakub Kicinski 2012314fe9eSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 2022314fe9eSJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 203d9ae7f2bSJakub Kicinski } 204d9ae7f2bSJakub Kicinski 205d9ae7f2bSJakub Kicinski static void 206d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 207d9ae7f2bSJakub Kicinski { 2082314fe9eSJakub Kicinski emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); 209d9ae7f2bSJakub Kicinski } 210d9ae7f2bSJakub Kicinski 211d9ae7f2bSJakub Kicinski static void 212d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 213d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 214995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 215995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 216d9ae7f2bSJakub Kicinski { 217d9ae7f2bSJakub Kicinski u64 insn; 218d9ae7f2bSJakub Kicinski 219d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 220d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 221d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 222d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 223d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 224d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 225d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 226995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 227995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 228995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 229d9ae7f2bSJakub Kicinski 230d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 231d9ae7f2bSJakub Kicinski } 232d9ae7f2bSJakub Kicinski 233d9ae7f2bSJakub Kicinski static void 234b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 235d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 236d9ae7f2bSJakub Kicinski { 237d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 238d9ae7f2bSJakub Kicinski int err; 239d9ae7f2bSJakub Kicinski 240b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 241d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 242d9ae7f2bSJakub Kicinski return; 243d9ae7f2bSJakub Kicinski } 244d9ae7f2bSJakub Kicinski 245d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 246d9ae7f2bSJakub Kicinski if (err) { 247d9ae7f2bSJakub Kicinski nfp_prog->error = err; 248d9ae7f2bSJakub Kicinski return; 249d9ae7f2bSJakub Kicinski } 250d9ae7f2bSJakub Kicinski 2513239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 2523239e7bbSJiong Wang __emit_immed(nfp_prog, 2533239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 2543239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 2553239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 256d9ae7f2bSJakub Kicinski } 257d9ae7f2bSJakub Kicinski 258d9ae7f2bSJakub Kicinski static void 259d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 260d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 261995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 262995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 263d9ae7f2bSJakub Kicinski { 264d9ae7f2bSJakub Kicinski u64 insn; 265d9ae7f2bSJakub Kicinski 266d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 267d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 268d9ae7f2bSJakub Kicinski return; 269d9ae7f2bSJakub Kicinski } 270d9ae7f2bSJakub Kicinski 271d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 272d9ae7f2bSJakub Kicinski shift = 32 - shift; 273d9ae7f2bSJakub Kicinski 274d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 275d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 276d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 277d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 278d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 279d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 280d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 281d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 283d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 284995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 285995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 286995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 287d9ae7f2bSJakub Kicinski 288d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 289d9ae7f2bSJakub Kicinski } 290d9ae7f2bSJakub Kicinski 291d9ae7f2bSJakub Kicinski static void 292b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 293b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 294d9ae7f2bSJakub Kicinski { 295d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 296d9ae7f2bSJakub Kicinski int err; 297d9ae7f2bSJakub Kicinski 298d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 299d9ae7f2bSJakub Kicinski if (err) { 300d9ae7f2bSJakub Kicinski nfp_prog->error = err; 301d9ae7f2bSJakub Kicinski return; 302d9ae7f2bSJakub Kicinski } 303d9ae7f2bSJakub Kicinski 304d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 305995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 306995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 307d9ae7f2bSJakub Kicinski } 308d9ae7f2bSJakub Kicinski 309d9ae7f2bSJakub Kicinski static void 310d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 311995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 312995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 313d9ae7f2bSJakub Kicinski { 314d9ae7f2bSJakub Kicinski u64 insn; 315d9ae7f2bSJakub Kicinski 316d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 317d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 318d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 319d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 320d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 321d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 322d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 323995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 324995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 325995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 326d9ae7f2bSJakub Kicinski 327d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 328d9ae7f2bSJakub Kicinski } 329d9ae7f2bSJakub Kicinski 330d9ae7f2bSJakub Kicinski static void 331b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 332b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 333d9ae7f2bSJakub Kicinski { 334d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 335d9ae7f2bSJakub Kicinski int err; 336d9ae7f2bSJakub Kicinski 337d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 338d9ae7f2bSJakub Kicinski if (err) { 339d9ae7f2bSJakub Kicinski nfp_prog->error = err; 340d9ae7f2bSJakub Kicinski return; 341d9ae7f2bSJakub Kicinski } 342d9ae7f2bSJakub Kicinski 343d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 344995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 345995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 346d9ae7f2bSJakub Kicinski } 347d9ae7f2bSJakub Kicinski 348d9ae7f2bSJakub Kicinski static void 349d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 350d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 351995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 352995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 353d9ae7f2bSJakub Kicinski { 354d9ae7f2bSJakub Kicinski u64 insn; 355d9ae7f2bSJakub Kicinski 356d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 357d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 358d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 359d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 360d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 361d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 362d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 363d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 364d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 365995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 366995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 367995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 368d9ae7f2bSJakub Kicinski 369d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 370d9ae7f2bSJakub Kicinski } 371d9ae7f2bSJakub Kicinski 372d9ae7f2bSJakub Kicinski static void 373bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 374bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 375d9ae7f2bSJakub Kicinski { 376d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 377d9ae7f2bSJakub Kicinski int err; 378d9ae7f2bSJakub Kicinski 3792de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 3802de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 381d9ae7f2bSJakub Kicinski if (err) { 382d9ae7f2bSJakub Kicinski nfp_prog->error = err; 383d9ae7f2bSJakub Kicinski return; 384d9ae7f2bSJakub Kicinski } 385d9ae7f2bSJakub Kicinski 386d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 387995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 388995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 389d9ae7f2bSJakub Kicinski } 390d9ae7f2bSJakub Kicinski 391d9ae7f2bSJakub Kicinski static void 392b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 393d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 394d9ae7f2bSJakub Kicinski { 395bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 396d9ae7f2bSJakub Kicinski } 397d9ae7f2bSJakub Kicinski 3982df03a50SJakub Kicinski static void 3992df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 4002df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 4012df03a50SJakub Kicinski { 4022df03a50SJakub Kicinski u64 insn; 4032df03a50SJakub Kicinski 4042df03a50SJakub Kicinski insn = OP_LCSR_BASE | 4052df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 4062df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 4072df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 408df4a37d8SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr / 4) | 4092df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 4102df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 4112df03a50SJakub Kicinski 4122df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 4132df03a50SJakub Kicinski } 4142df03a50SJakub Kicinski 4152df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 4162df03a50SJakub Kicinski { 4172df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 4182df03a50SJakub Kicinski int err; 4192df03a50SJakub Kicinski 4202df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 4212df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 4222df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 4232df03a50SJakub Kicinski * copy the immed to both operands. 4242df03a50SJakub Kicinski */ 4252df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 4262df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 4272df03a50SJakub Kicinski reg.breg = reg.areg; 4282df03a50SJakub Kicinski } else { 4292df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 4302df03a50SJakub Kicinski } 4312df03a50SJakub Kicinski if (err) { 4322df03a50SJakub Kicinski nfp_prog->error = err; 4332df03a50SJakub Kicinski return; 4342df03a50SJakub Kicinski } 4352df03a50SJakub Kicinski 436df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr, 4372df03a50SJakub Kicinski false, reg.src_lmextn); 4382df03a50SJakub Kicinski } 4392df03a50SJakub Kicinski 440df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 441df4a37d8SJakub Kicinski static void __emit_csr_rd(struct nfp_prog *nfp_prog, u16 addr) 442df4a37d8SJakub Kicinski { 443df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, 0, 0, false, addr, false, false); 444df4a37d8SJakub Kicinski } 445df4a37d8SJakub Kicinski 4461c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 4471c03e03fSJakub Kicinski { 4481c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 4491c03e03fSJakub Kicinski } 4501c03e03fSJakub Kicinski 451d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 452d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 453d9ae7f2bSJakub Kicinski { 454d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 455d9ae7f2bSJakub Kicinski *val = imm; 456d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 457d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 458d9ae7f2bSJakub Kicinski *val = imm >> 8; 459d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 460d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 461d9ae7f2bSJakub Kicinski *val = imm >> 16; 462d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 463d9ae7f2bSJakub Kicinski } else { 464d9ae7f2bSJakub Kicinski return false; 465d9ae7f2bSJakub Kicinski } 466d9ae7f2bSJakub Kicinski 467d9ae7f2bSJakub Kicinski return true; 468d9ae7f2bSJakub Kicinski } 469d9ae7f2bSJakub Kicinski 470b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 471d9ae7f2bSJakub Kicinski { 472d9ae7f2bSJakub Kicinski enum immed_shift shift; 473d9ae7f2bSJakub Kicinski u16 val; 474d9ae7f2bSJakub Kicinski 475d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 476d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 477d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 478d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 479d9ae7f2bSJakub Kicinski } else { 480d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 481d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 482d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 483d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 484d9ae7f2bSJakub Kicinski } 485d9ae7f2bSJakub Kicinski } 486d9ae7f2bSJakub Kicinski 48777a3d311SJakub Kicinski static void 48877a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 48977a3d311SJakub Kicinski enum nfp_relo_type relo) 49077a3d311SJakub Kicinski { 49177a3d311SJakub Kicinski if (imm > 0xffff) { 49277a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 49377a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 49477a3d311SJakub Kicinski return; 49577a3d311SJakub Kicinski } 49677a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 49777a3d311SJakub Kicinski 49877a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 49977a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 50077a3d311SJakub Kicinski } 50177a3d311SJakub Kicinski 502d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 503d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 504d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 505d9ae7f2bSJakub Kicinski */ 506b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 507d9ae7f2bSJakub Kicinski { 508d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 509d9ae7f2bSJakub Kicinski return reg_imm(imm); 510d9ae7f2bSJakub Kicinski 511d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 512d9ae7f2bSJakub Kicinski return tmp_reg; 513d9ae7f2bSJakub Kicinski } 514d9ae7f2bSJakub Kicinski 515d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 516d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 517d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 518d9ae7f2bSJakub Kicinski */ 519b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 520d9ae7f2bSJakub Kicinski { 521d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 522d9ae7f2bSJakub Kicinski return reg_imm(imm); 523d9ae7f2bSJakub Kicinski 524d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 525d9ae7f2bSJakub Kicinski return tmp_reg; 526d9ae7f2bSJakub Kicinski } 527d9ae7f2bSJakub Kicinski 528ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 529ff42bb9fSJakub Kicinski { 530ff42bb9fSJakub Kicinski while (count--) 531ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 532ff42bb9fSJakub Kicinski } 533ff42bb9fSJakub Kicinski 534c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 535c000dfb5SJakub Kicinski { 536c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 537c000dfb5SJakub Kicinski } 538c000dfb5SJakub Kicinski 539d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 540d9ae7f2bSJakub Kicinski { 541c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 542d9ae7f2bSJakub Kicinski } 543d9ae7f2bSJakub Kicinski 5449879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 5459879a381SJiong Wang * result to @dst from low end. 5469879a381SJiong Wang */ 5479879a381SJiong Wang static void 5489879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 5499879a381SJiong Wang u8 offset) 5509879a381SJiong Wang { 5519879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 5529879a381SJiong Wang u8 mask = (1 << field_len) - 1; 5539879a381SJiong Wang 5549879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 5559879a381SJiong Wang } 5569879a381SJiong Wang 55791ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 55891ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 55991ff69e8SJiong Wang */ 56091ff69e8SJiong Wang static void 56191ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 56291ff69e8SJiong Wang u8 field_len, u8 offset) 56391ff69e8SJiong Wang { 56491ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 56591ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 56691ff69e8SJiong Wang 56791ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 56891ff69e8SJiong Wang } 56991ff69e8SJiong Wang 5703dd43c33SJakub Kicinski static void 5713dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 5723dd43c33SJakub Kicinski swreg *rega, swreg *regb) 5733dd43c33SJakub Kicinski { 5743dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 5753dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 5763dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 5773dd43c33SJakub Kicinski return; 5783dd43c33SJakub Kicinski } 5793dd43c33SJakub Kicinski 5803dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 5813dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 5823dd43c33SJakub Kicinski reg_imm(0)); 5833dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 5843dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 5853dd43c33SJakub Kicinski } 5863dd43c33SJakub Kicinski 5879879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 5889879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 5899879a381SJiong Wang { 5909879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 5919879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 5929879a381SJiong Wang swreg src_base, off; 5933dd43c33SJakub Kicinski bool src_40bit_addr; 5949879a381SJiong Wang unsigned int i; 5959879a381SJiong Wang u8 xfer_num; 5969879a381SJiong Wang 5979879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 5983dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 5999879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 6009879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 6019879a381SJiong Wang 6023dd43c33SJakub Kicinski if (src_40bit_addr) 6033dd43c33SJakub Kicinski addr40_offset(nfp_prog, meta->insn.src_reg, off, &src_base, 6043dd43c33SJakub Kicinski &off); 6053dd43c33SJakub Kicinski 6068c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 6078c900538SJiong Wang if (len > 32) 6088c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6098c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6108c900538SJiong Wang 6119879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 6123dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 6133dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 614b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 6159879a381SJiong Wang 6169879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 6179879a381SJiong Wang for (i = 0; i < xfer_num; i++) 6189879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 6199879a381SJiong Wang 6209879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 6219879a381SJiong Wang 6229879a381SJiong Wang if (len <= 8) { 6239879a381SJiong Wang /* Use single direct_ref write8. */ 6249879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6259879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 626b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6278c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 6289879a381SJiong Wang /* Use single direct_ref write32. */ 6299879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6309879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 631b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6328c900538SJiong Wang } else if (len <= 32) { 6339879a381SJiong Wang /* Use single indirect_ref write8. */ 6349879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 6359879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 6369879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6379879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 638b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 6398c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 6408c900538SJiong Wang /* Use single indirect_ref write32. */ 6418c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6428c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6438c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6448c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 645b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 6468c900538SJiong Wang } else if (len <= 40) { 6478c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 6488c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 6498c900538SJiong Wang */ 6508c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6518c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 652b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6538c900538SJiong Wang 6548c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 6558c900538SJiong Wang imm_b(nfp_prog)); 6568c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 6578c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 658b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6598c900538SJiong Wang } else { 6608c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 6618c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 6628c900538SJiong Wang */ 6638c900538SJiong Wang u8 new_off; 6648c900538SJiong Wang 6658c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6668c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 6678c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6688c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 669b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 6708c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 6718c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 6728c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 6738c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 674b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 6759879a381SJiong Wang } 6769879a381SJiong Wang 6779879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 6789879a381SJiong Wang * before and after we do memory copy optimization. 6799879a381SJiong Wang * 6809879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 6819879a381SJiong Wang * need to make sure it is loaded with the value the same as before 6829879a381SJiong Wang * this transformation. 6839879a381SJiong Wang * 6849879a381SJiong Wang * These extra loads could be removed once we have accurate register 6859879a381SJiong Wang * usage information. 6869879a381SJiong Wang */ 6879879a381SJiong Wang if (descending_seq) 6889879a381SJiong Wang xfer_num = 0; 6899879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 6909879a381SJiong Wang xfer_num = xfer_num - 1; 6919879a381SJiong Wang else 6929879a381SJiong Wang xfer_num = xfer_num - 2; 6939879a381SJiong Wang 6949879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 6959879a381SJiong Wang case BPF_B: 6969879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6979879a381SJiong Wang reg_xfer(xfer_num), 1, 6989879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 6999879a381SJiong Wang break; 7009879a381SJiong Wang case BPF_H: 7019879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7029879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 7039879a381SJiong Wang break; 7049879a381SJiong Wang case BPF_W: 7059879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7069879a381SJiong Wang reg_xfer(0)); 7079879a381SJiong Wang break; 7089879a381SJiong Wang case BPF_DW: 7099879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7109879a381SJiong Wang reg_xfer(xfer_num)); 7119879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 7129879a381SJiong Wang reg_xfer(xfer_num + 1)); 7139879a381SJiong Wang break; 7149879a381SJiong Wang } 7159879a381SJiong Wang 7169879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 7179879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 7189879a381SJiong Wang 7199879a381SJiong Wang return 0; 7209879a381SJiong Wang } 7219879a381SJiong Wang 722d9ae7f2bSJakub Kicinski static int 7230a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 724d9ae7f2bSJakub Kicinski { 725d9ae7f2bSJakub Kicinski unsigned int i; 726d9ae7f2bSJakub Kicinski u16 shift, sz; 727d9ae7f2bSJakub Kicinski 728d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 729d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 730d9ae7f2bSJakub Kicinski */ 7310a793977SJakub Kicinski sz = max(size, 4); 732d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 733d9ae7f2bSJakub Kicinski 7340a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 735b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 7360a793977SJakub Kicinski 7370a793977SJakub Kicinski i = 0; 7380a793977SJakub Kicinski if (shift) 7390a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 7400a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 7410a793977SJakub Kicinski else 7420a793977SJakub Kicinski for (; i * 4 < size; i++) 7430a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7440a793977SJakub Kicinski 7450a793977SJakub Kicinski if (i < 2) 7460a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7470a793977SJakub Kicinski 7480a793977SJakub Kicinski return 0; 7490a793977SJakub Kicinski } 7500a793977SJakub Kicinski 7510a793977SJakub Kicinski static int 7523dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 7533dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 7542ca71441SJakub Kicinski { 7552ca71441SJakub Kicinski unsigned int i; 7562ca71441SJakub Kicinski u8 mask, sz; 7572ca71441SJakub Kicinski 7583dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 7592ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 7602ca71441SJakub Kicinski */ 7612ca71441SJakub Kicinski sz = max(size, 4); 7622ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 7632ca71441SJakub Kicinski 7643dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 765b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 7662ca71441SJakub Kicinski 7672ca71441SJakub Kicinski i = 0; 7682ca71441SJakub Kicinski if (mask) 7692ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 7702ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 7712ca71441SJakub Kicinski else 7722ca71441SJakub Kicinski for (; i * 4 < size; i++) 7732ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7742ca71441SJakub Kicinski 7752ca71441SJakub Kicinski if (i < 2) 7762ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7772ca71441SJakub Kicinski 7782ca71441SJakub Kicinski return 0; 7792ca71441SJakub Kicinski } 7802ca71441SJakub Kicinski 7812ca71441SJakub Kicinski static int 7823dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7833dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7843dd43c33SJakub Kicinski { 7853dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 7863dd43c33SJakub Kicinski size, CMD_MODE_32b); 7873dd43c33SJakub Kicinski } 7883dd43c33SJakub Kicinski 7893dd43c33SJakub Kicinski static int 7903dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7913dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7923dd43c33SJakub Kicinski { 7933dd43c33SJakub Kicinski swreg rega, regb; 7943dd43c33SJakub Kicinski 7953dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 7963dd43c33SJakub Kicinski 7973dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 7983dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 7993dd43c33SJakub Kicinski } 8003dd43c33SJakub Kicinski 8013dd43c33SJakub Kicinski static int 8020a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 8030a793977SJakub Kicinski { 8040a793977SJakub Kicinski swreg tmp_reg; 8050a793977SJakub Kicinski 806d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 807d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8080a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 8090a793977SJakub Kicinski 810d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 811d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 812d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 813d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 81418e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 815e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8160a793977SJakub Kicinski 817d9ae7f2bSJakub Kicinski /* Load data */ 8180a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 819d9ae7f2bSJakub Kicinski } 820d9ae7f2bSJakub Kicinski 821d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 822d9ae7f2bSJakub Kicinski { 8230a793977SJakub Kicinski swreg tmp_reg; 8240a793977SJakub Kicinski 8250a793977SJakub Kicinski /* Check packet length */ 8260a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 8270a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 828e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8290a793977SJakub Kicinski 8300a793977SJakub Kicinski /* Load data */ 8310a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8320a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 833d9ae7f2bSJakub Kicinski } 834d9ae7f2bSJakub Kicinski 835e663fe38SJakub Kicinski static int 836e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 837e663fe38SJakub Kicinski u8 src_gpr, u8 size) 838e663fe38SJakub Kicinski { 839e663fe38SJakub Kicinski unsigned int i; 840e663fe38SJakub Kicinski 841e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 842e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 843e663fe38SJakub Kicinski 844e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 845b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 846e663fe38SJakub Kicinski 847e663fe38SJakub Kicinski return 0; 848e663fe38SJakub Kicinski } 849e663fe38SJakub Kicinski 850e663fe38SJakub Kicinski static int 851e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 852e663fe38SJakub Kicinski u64 imm, u8 size) 853e663fe38SJakub Kicinski { 854e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 855e663fe38SJakub Kicinski if (size == 8) 856e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 857e663fe38SJakub Kicinski 858e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 859b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 860e663fe38SJakub Kicinski 861e663fe38SJakub Kicinski return 0; 862e663fe38SJakub Kicinski } 863e663fe38SJakub Kicinski 864ee9133a8SJakub Kicinski typedef int 865ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 8662df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8672df03a50SJakub Kicinski bool needs_inc); 868a82b23fbSJakub Kicinski 869a82b23fbSJakub Kicinski static int 870a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 8712df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8722df03a50SJakub Kicinski bool needs_inc) 873a82b23fbSJakub Kicinski { 8742df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 875a82b23fbSJakub Kicinski u32 idx, src_byte; 876a82b23fbSJakub Kicinski enum shf_sc sc; 877a82b23fbSJakub Kicinski swreg reg; 878a82b23fbSJakub Kicinski int shf; 879a82b23fbSJakub Kicinski u8 mask; 880a82b23fbSJakub Kicinski 881a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 882a82b23fbSJakub Kicinski return -EOPNOTSUPP; 883a82b23fbSJakub Kicinski 884a82b23fbSJakub Kicinski idx = off / 4; 885a82b23fbSJakub Kicinski 886a82b23fbSJakub Kicinski /* Move the entire word */ 887a82b23fbSJakub Kicinski if (size == 4) { 8882df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 8892df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 890a82b23fbSJakub Kicinski return 0; 891a82b23fbSJakub Kicinski } 892a82b23fbSJakub Kicinski 8932df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8942df03a50SJakub Kicinski return -EOPNOTSUPP; 8952df03a50SJakub Kicinski 896a82b23fbSJakub Kicinski src_byte = off % 4; 897a82b23fbSJakub Kicinski 898a82b23fbSJakub Kicinski mask = (1 << size) - 1; 899a82b23fbSJakub Kicinski mask <<= dst_byte; 900a82b23fbSJakub Kicinski 901a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 902a82b23fbSJakub Kicinski return -EOPNOTSUPP; 903a82b23fbSJakub Kicinski 904a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 905a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 906a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 907a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 908a82b23fbSJakub Kicinski shf = 32 - shf; 909a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 910a82b23fbSJakub Kicinski } else { 911a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 912a82b23fbSJakub Kicinski } 913a82b23fbSJakub Kicinski 914a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 915a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 916a82b23fbSJakub Kicinski */ 917a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9182df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 919a82b23fbSJakub Kicinski } else { 920a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 9219a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 9229a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 9239a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 9249a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 9259a90c83cSJakub Kicinski */ 9269a90c83cSJakub Kicinski if (first || !new_gpr) 927a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 928a82b23fbSJakub Kicinski } 929a82b23fbSJakub Kicinski 930a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 931a82b23fbSJakub Kicinski 9322df03a50SJakub Kicinski if (should_inc) 9332df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9342df03a50SJakub Kicinski 935a82b23fbSJakub Kicinski return 0; 936a82b23fbSJakub Kicinski } 937ee9133a8SJakub Kicinski 938ee9133a8SJakub Kicinski static int 939ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 9402df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9412df03a50SJakub Kicinski bool needs_inc) 942ee9133a8SJakub Kicinski { 9432df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 944ee9133a8SJakub Kicinski u32 idx, dst_byte; 945ee9133a8SJakub Kicinski enum shf_sc sc; 946ee9133a8SJakub Kicinski swreg reg; 947ee9133a8SJakub Kicinski int shf; 948ee9133a8SJakub Kicinski u8 mask; 949ee9133a8SJakub Kicinski 950ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 951ee9133a8SJakub Kicinski return -EOPNOTSUPP; 952ee9133a8SJakub Kicinski 953ee9133a8SJakub Kicinski idx = off / 4; 954ee9133a8SJakub Kicinski 955ee9133a8SJakub Kicinski /* Move the entire word */ 956ee9133a8SJakub Kicinski if (size == 4) { 9572df03a50SJakub Kicinski wrp_mov(nfp_prog, 9582df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 9592df03a50SJakub Kicinski reg_b(src)); 960ee9133a8SJakub Kicinski return 0; 961ee9133a8SJakub Kicinski } 962ee9133a8SJakub Kicinski 9632df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9642df03a50SJakub Kicinski return -EOPNOTSUPP; 9652df03a50SJakub Kicinski 966ee9133a8SJakub Kicinski dst_byte = off % 4; 967ee9133a8SJakub Kicinski 968ee9133a8SJakub Kicinski mask = (1 << size) - 1; 969ee9133a8SJakub Kicinski mask <<= dst_byte; 970ee9133a8SJakub Kicinski 971ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 972ee9133a8SJakub Kicinski return -EOPNOTSUPP; 973ee9133a8SJakub Kicinski 974ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 975ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 976ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 977ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 978ee9133a8SJakub Kicinski shf = 32 - shf; 979ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 980ee9133a8SJakub Kicinski } else { 981ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 982ee9133a8SJakub Kicinski } 983ee9133a8SJakub Kicinski 984ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 985ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 986ee9133a8SJakub Kicinski */ 987ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9882df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 989ee9133a8SJakub Kicinski } else { 990ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 9919a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 9929a90c83cSJakub Kicinski * the middle location will be overwritten fully. 9939a90c83cSJakub Kicinski */ 9949a90c83cSJakub Kicinski if (first || last) 995ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 996ee9133a8SJakub Kicinski } 997ee9133a8SJakub Kicinski 998ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 999ee9133a8SJakub Kicinski 10009a90c83cSJakub Kicinski if (new_gpr || last) { 1001ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1002ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 10032df03a50SJakub Kicinski if (should_inc) 10042df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10059a90c83cSJakub Kicinski } 1006ee9133a8SJakub Kicinski 1007ee9133a8SJakub Kicinski return 0; 1008ee9133a8SJakub Kicinski } 1009ee9133a8SJakub Kicinski 1010ee9133a8SJakub Kicinski static int 1011ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1012b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1013b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1014ee9133a8SJakub Kicinski { 1015d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 10169a90c83cSJakub Kicinski bool first = true, last; 10172df03a50SJakub Kicinski bool needs_inc = false; 10182df03a50SJakub Kicinski swreg stack_off_reg; 1019a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1020ee9133a8SJakub Kicinski u32 gpr_byte = 0; 10212df03a50SJakub Kicinski bool lm3 = true; 1022ee9133a8SJakub Kicinski int ret; 1023ee9133a8SJakub Kicinski 1024b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1025b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1026b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1027b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1028b14157eeSJakub Kicinski */ 1029b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1030b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1031b14157eeSJakub Kicinski 1032b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1033b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1034b14157eeSJakub Kicinski 1035b14157eeSJakub Kicinski needs_inc = true; 1036b14157eeSJakub Kicinski } else if (off + size <= 64) { 10372df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 10382df03a50SJakub Kicinski lm3 = false; 10392df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 10402df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 10412df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 10422df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 10432df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 10442df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 10452df03a50SJakub Kicinski */ 10462df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 10472df03a50SJakub Kicinski stack_imm(nfp_prog)); 10482df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10492df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10502df03a50SJakub Kicinski 10512df03a50SJakub Kicinski off %= 32; 10522df03a50SJakub Kicinski } else { 10532df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 10542df03a50SJakub Kicinski stack_imm(nfp_prog)); 10552df03a50SJakub Kicinski 10562df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10572df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10582df03a50SJakub Kicinski 10592df03a50SJakub Kicinski needs_inc = true; 10602df03a50SJakub Kicinski } 10612df03a50SJakub Kicinski if (lm3) { 10622df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 10632df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 10642df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 10652df03a50SJakub Kicinski } 10662df03a50SJakub Kicinski 1067a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1068a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1069a82b23fbSJakub Kicinski 1070ee9133a8SJakub Kicinski while (size) { 1071ee9133a8SJakub Kicinski u32 slice_end; 1072ee9133a8SJakub Kicinski u8 slice_size; 1073ee9133a8SJakub Kicinski 1074ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1075ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1076ee9133a8SJakub Kicinski slice_size = slice_end - off; 1077ee9133a8SJakub Kicinski 10789a90c83cSJakub Kicinski last = slice_size == size; 10799a90c83cSJakub Kicinski 10802df03a50SJakub Kicinski if (needs_inc) 10812df03a50SJakub Kicinski off %= 4; 10822df03a50SJakub Kicinski 1083a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 10842df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1085ee9133a8SJakub Kicinski if (ret) 1086ee9133a8SJakub Kicinski return ret; 1087ee9133a8SJakub Kicinski 1088a82b23fbSJakub Kicinski prev_gpr = gpr; 10899a90c83cSJakub Kicinski first = false; 10909a90c83cSJakub Kicinski 1091ee9133a8SJakub Kicinski gpr_byte += slice_size; 1092ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1093ee9133a8SJakub Kicinski gpr_byte -= 4; 1094ee9133a8SJakub Kicinski gpr++; 1095ee9133a8SJakub Kicinski } 1096ee9133a8SJakub Kicinski 1097ee9133a8SJakub Kicinski size -= slice_size; 1098ee9133a8SJakub Kicinski off += slice_size; 1099ee9133a8SJakub Kicinski } 1100ee9133a8SJakub Kicinski 1101ee9133a8SJakub Kicinski return 0; 1102ee9133a8SJakub Kicinski } 1103ee9133a8SJakub Kicinski 1104d9ae7f2bSJakub Kicinski static void 1105d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1106d9ae7f2bSJakub Kicinski { 1107b3f868dfSJakub Kicinski swreg tmp_reg; 1108d9ae7f2bSJakub Kicinski 1109d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1110d9ae7f2bSJakub Kicinski if (!imm) 1111d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1112d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1113d9ae7f2bSJakub Kicinski return; 1114d9ae7f2bSJakub Kicinski } 1115d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1116d9ae7f2bSJakub Kicinski if (!~imm) 1117d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1118d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1119d9ae7f2bSJakub Kicinski return; 1120d9ae7f2bSJakub Kicinski } 1121d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1122d9ae7f2bSJakub Kicinski if (!~imm) 1123d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 11245d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1125d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1126d9ae7f2bSJakub Kicinski return; 1127d9ae7f2bSJakub Kicinski } 1128d9ae7f2bSJakub Kicinski 1129d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1130d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1131d9ae7f2bSJakub Kicinski } 1132d9ae7f2bSJakub Kicinski 1133d9ae7f2bSJakub Kicinski static int 1134d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1135d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1136d9ae7f2bSJakub Kicinski { 1137d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1138d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1139d9ae7f2bSJakub Kicinski 1140d9ae7f2bSJakub Kicinski if (skip) { 1141d9ae7f2bSJakub Kicinski meta->skip = true; 1142d9ae7f2bSJakub Kicinski return 0; 1143d9ae7f2bSJakub Kicinski } 1144d9ae7f2bSJakub Kicinski 1145d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1146d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1147d9ae7f2bSJakub Kicinski 1148d9ae7f2bSJakub Kicinski return 0; 1149d9ae7f2bSJakub Kicinski } 1150d9ae7f2bSJakub Kicinski 1151d9ae7f2bSJakub Kicinski static int 1152d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1153d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1154d9ae7f2bSJakub Kicinski { 1155d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1156d9ae7f2bSJakub Kicinski 1157d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1158d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1159d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1160d9ae7f2bSJakub Kicinski 1161d9ae7f2bSJakub Kicinski return 0; 1162d9ae7f2bSJakub Kicinski } 1163d9ae7f2bSJakub Kicinski 1164d9ae7f2bSJakub Kicinski static int 1165d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1166d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1167d9ae7f2bSJakub Kicinski { 1168d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1169d9ae7f2bSJakub Kicinski 1170d9ae7f2bSJakub Kicinski if (skip) { 1171d9ae7f2bSJakub Kicinski meta->skip = true; 1172d9ae7f2bSJakub Kicinski return 0; 1173d9ae7f2bSJakub Kicinski } 1174d9ae7f2bSJakub Kicinski 1175d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1176d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1177d9ae7f2bSJakub Kicinski 1178d9ae7f2bSJakub Kicinski return 0; 1179d9ae7f2bSJakub Kicinski } 1180d9ae7f2bSJakub Kicinski 1181d9ae7f2bSJakub Kicinski static int 1182d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1183d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1184d9ae7f2bSJakub Kicinski { 1185d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1186d9ae7f2bSJakub Kicinski 1187d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1188d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1189d9ae7f2bSJakub Kicinski 1190d9ae7f2bSJakub Kicinski return 0; 1191d9ae7f2bSJakub Kicinski } 1192d9ae7f2bSJakub Kicinski 1193d9ae7f2bSJakub Kicinski static void 1194d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1195d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1196d9ae7f2bSJakub Kicinski { 1197d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1198d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1199d9ae7f2bSJakub Kicinski } 1200d9ae7f2bSJakub Kicinski 1201d9ae7f2bSJakub Kicinski static int 1202d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1203d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1204d9ae7f2bSJakub Kicinski { 1205d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1206d9ae7f2bSJakub Kicinski 1207d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1208d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1209d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1210d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1211d9ae7f2bSJakub Kicinski 1212d9ae7f2bSJakub Kicinski return 0; 1213d9ae7f2bSJakub Kicinski } 1214d9ae7f2bSJakub Kicinski 1215d9ae7f2bSJakub Kicinski static int 1216d9ae7f2bSJakub Kicinski wrp_cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1217d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1218d9ae7f2bSJakub Kicinski { 1219d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1220d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1221d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1222b3f868dfSJakub Kicinski swreg tmp_reg; 1223d9ae7f2bSJakub Kicinski 1224d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1225d9ae7f2bSJakub Kicinski if (!swap) 1226d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), ALU_OP_SUB, tmp_reg); 1227d9ae7f2bSJakub Kicinski else 1228d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, ALU_OP_SUB, reg_a(reg)); 1229d9ae7f2bSJakub Kicinski 1230d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1231d9ae7f2bSJakub Kicinski if (!swap) 1232d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1233d9ae7f2bSJakub Kicinski reg_a(reg + 1), ALU_OP_SUB_C, tmp_reg); 1234d9ae7f2bSJakub Kicinski else 1235d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1236d9ae7f2bSJakub Kicinski tmp_reg, ALU_OP_SUB_C, reg_a(reg + 1)); 1237d9ae7f2bSJakub Kicinski 1238d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1239d9ae7f2bSJakub Kicinski 1240d9ae7f2bSJakub Kicinski return 0; 1241d9ae7f2bSJakub Kicinski } 1242d9ae7f2bSJakub Kicinski 1243d9ae7f2bSJakub Kicinski static int 1244d9ae7f2bSJakub Kicinski wrp_cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1245d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1246d9ae7f2bSJakub Kicinski { 1247d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 124826fa818dSJakub Kicinski u8 areg, breg; 124926fa818dSJakub Kicinski 125026fa818dSJakub Kicinski areg = insn->dst_reg * 2; 125126fa818dSJakub Kicinski breg = insn->src_reg * 2; 1252d9ae7f2bSJakub Kicinski 1253d9ae7f2bSJakub Kicinski if (swap) { 1254d9ae7f2bSJakub Kicinski areg ^= breg; 1255d9ae7f2bSJakub Kicinski breg ^= areg; 1256d9ae7f2bSJakub Kicinski areg ^= breg; 1257d9ae7f2bSJakub Kicinski } 1258d9ae7f2bSJakub Kicinski 1259d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1260d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1261d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 1262d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1263d9ae7f2bSJakub Kicinski 1264d9ae7f2bSJakub Kicinski return 0; 1265d9ae7f2bSJakub Kicinski } 1266d9ae7f2bSJakub Kicinski 12673119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 12683119d1fdSJakub Kicinski { 12693119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 12703119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 12713119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 12723119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 12733119d1fdSJakub Kicinski } 12743119d1fdSJakub Kicinski 12750d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12760d49eaf4SJakub Kicinski { 12770d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 12780d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 12790d49eaf4SJakub Kicinski u32 ret_einval, end; 12800d49eaf4SJakub Kicinski 12810d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 12820d49eaf4SJakub Kicinski 12838231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 12848231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 12858231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 12868231f844SJakub Kicinski return -EINVAL; 12878231f844SJakub Kicinski 12888231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 12898231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 12908231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12918231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12928231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12938231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12948231f844SJakub Kicinski 12958231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12968231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12978231f844SJakub Kicinski 12988231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 12998231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 13008231f844SJakub Kicinski */ 13018231f844SJakub Kicinski 13028231f844SJakub Kicinski return 0; 13038231f844SJakub Kicinski } 13048231f844SJakub Kicinski 13050d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 13060d49eaf4SJakub Kicinski end = ret_einval + 2; 13070d49eaf4SJakub Kicinski 13080d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 13090d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 13100d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 13110d49eaf4SJakub Kicinski 13120d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 13130d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13140d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 13150d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13160d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13170d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 13180d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13190d49eaf4SJakub Kicinski 13200d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 13210d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 13220d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13230d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13240d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 13250d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 13260d49eaf4SJakub Kicinski 13270d49eaf4SJakub Kicinski /* Load the ret code */ 13280d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 13290d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 13300d49eaf4SJakub Kicinski 13310d49eaf4SJakub Kicinski /* Modify the packet metadata */ 13320d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 13330d49eaf4SJakub Kicinski 13340d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 13352314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 13360d49eaf4SJakub Kicinski 13370d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13380d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13390d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 13400d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13410d49eaf4SJakub Kicinski 13420d49eaf4SJakub Kicinski /* return -EINVAL target */ 13430d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 13440d49eaf4SJakub Kicinski return -EINVAL; 13450d49eaf4SJakub Kicinski 13460d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 13470d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 13480d49eaf4SJakub Kicinski 13490d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 13500d49eaf4SJakub Kicinski return -EINVAL; 13510d49eaf4SJakub Kicinski 13520d49eaf4SJakub Kicinski return 0; 13530d49eaf4SJakub Kicinski } 13540d49eaf4SJakub Kicinski 135577a3d311SJakub Kicinski static int 1356fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 135777a3d311SJakub Kicinski { 135877a3d311SJakub Kicinski struct bpf_offloaded_map *offmap; 135977a3d311SJakub Kicinski struct nfp_bpf_map *nfp_map; 136077a3d311SJakub Kicinski bool load_lm_ptr; 136177a3d311SJakub Kicinski u32 ret_tgt; 136277a3d311SJakub Kicinski s64 lm_off; 136377a3d311SJakub Kicinski swreg tid; 136477a3d311SJakub Kicinski 136577a3d311SJakub Kicinski offmap = (struct bpf_offloaded_map *)meta->arg1.map_ptr; 136677a3d311SJakub Kicinski nfp_map = offmap->dev_priv; 136777a3d311SJakub Kicinski 136877a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 136977a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 13702f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 13712f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 137277a3d311SJakub Kicinski 137377a3d311SJakub Kicinski /* Set LM0 to start of key */ 137477a3d311SJakub Kicinski if (load_lm_ptr) 137577a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 137644d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 137744d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 137877a3d311SJakub Kicinski 137977a3d311SJakub Kicinski /* Load map ID into a register, it should actually fit as an immediate 138077a3d311SJakub Kicinski * but in case it doesn't deal with it here, not in the delay slots. 138177a3d311SJakub Kicinski */ 138277a3d311SJakub Kicinski tid = ur_load_imm_any(nfp_prog, nfp_map->tid, imm_a(nfp_prog)); 138377a3d311SJakub Kicinski 1384fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 138577a3d311SJakub Kicinski 2, RELO_BR_HELPER); 138677a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 138777a3d311SJakub Kicinski 138877a3d311SJakub Kicinski /* Load map ID into A0 */ 138977a3d311SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), tid); 139077a3d311SJakub Kicinski 139177a3d311SJakub Kicinski /* Load the return address into B0 */ 139277a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 139377a3d311SJakub Kicinski 139477a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 139577a3d311SJakub Kicinski return -EINVAL; 139677a3d311SJakub Kicinski 139777a3d311SJakub Kicinski /* Reset the LM0 pointer */ 139877a3d311SJakub Kicinski if (!load_lm_ptr) 139977a3d311SJakub Kicinski return 0; 140077a3d311SJakub Kicinski 140177a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 140277a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 140377a3d311SJakub Kicinski 140477a3d311SJakub Kicinski return 0; 140577a3d311SJakub Kicinski } 140677a3d311SJakub Kicinski 1407df4a37d8SJakub Kicinski static int 1408df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1409df4a37d8SJakub Kicinski { 1410df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1411df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1412df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1413df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1414df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1415df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1416df4a37d8SJakub Kicinski return 0; 1417df4a37d8SJakub Kicinski } 1418df4a37d8SJakub Kicinski 1419d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1420d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1421d9ae7f2bSJakub Kicinski { 1422d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1423b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1424b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1425d9ae7f2bSJakub Kicinski 1426b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1427b14157eeSJakub Kicinski swreg stack_depth_reg; 1428b14157eeSJakub Kicinski 1429b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1430b14157eeSJakub Kicinski nfp_prog->stack_depth, 1431b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1432b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1433b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1434b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1435b14157eeSJakub Kicinski } else { 1436b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1437b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1438b14157eeSJakub Kicinski } 1439d9ae7f2bSJakub Kicinski 1440d9ae7f2bSJakub Kicinski return 0; 1441d9ae7f2bSJakub Kicinski } 1442d9ae7f2bSJakub Kicinski 1443d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1444d9ae7f2bSJakub Kicinski { 1445d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1446d9ae7f2bSJakub Kicinski 1447d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1448d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1449d9ae7f2bSJakub Kicinski 1450d9ae7f2bSJakub Kicinski return 0; 1451d9ae7f2bSJakub Kicinski } 1452d9ae7f2bSJakub Kicinski 1453d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1454d9ae7f2bSJakub Kicinski { 1455d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1456d9ae7f2bSJakub Kicinski } 1457d9ae7f2bSJakub Kicinski 1458d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1459d9ae7f2bSJakub Kicinski { 1460d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1461d9ae7f2bSJakub Kicinski } 1462d9ae7f2bSJakub Kicinski 1463d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1464d9ae7f2bSJakub Kicinski { 1465d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1466d9ae7f2bSJakub Kicinski } 1467d9ae7f2bSJakub Kicinski 1468d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1469d9ae7f2bSJakub Kicinski { 1470d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1471d9ae7f2bSJakub Kicinski } 1472d9ae7f2bSJakub Kicinski 1473d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1474d9ae7f2bSJakub Kicinski { 1475d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1476d9ae7f2bSJakub Kicinski } 1477d9ae7f2bSJakub Kicinski 1478d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1479d9ae7f2bSJakub Kicinski { 1480d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1481d9ae7f2bSJakub Kicinski } 1482d9ae7f2bSJakub Kicinski 1483d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1484d9ae7f2bSJakub Kicinski { 1485d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1486d9ae7f2bSJakub Kicinski 1487d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1488d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1489d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1490d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1491d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1492d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1493d9ae7f2bSJakub Kicinski 1494d9ae7f2bSJakub Kicinski return 0; 1495d9ae7f2bSJakub Kicinski } 1496d9ae7f2bSJakub Kicinski 1497d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1498d9ae7f2bSJakub Kicinski { 1499d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1500d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1501d9ae7f2bSJakub Kicinski 1502d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1503d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1504d9ae7f2bSJakub Kicinski 1505d9ae7f2bSJakub Kicinski return 0; 1506d9ae7f2bSJakub Kicinski } 1507d9ae7f2bSJakub Kicinski 1508d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1509d9ae7f2bSJakub Kicinski { 1510d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1511d9ae7f2bSJakub Kicinski 1512d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1513d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1514d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1515d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1516d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1517d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1518d9ae7f2bSJakub Kicinski 1519d9ae7f2bSJakub Kicinski return 0; 1520d9ae7f2bSJakub Kicinski } 1521d9ae7f2bSJakub Kicinski 1522d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1523d9ae7f2bSJakub Kicinski { 1524d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1525d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1526d9ae7f2bSJakub Kicinski 1527d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1528d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1529d9ae7f2bSJakub Kicinski 1530d9ae7f2bSJakub Kicinski return 0; 1531d9ae7f2bSJakub Kicinski } 1532d9ae7f2bSJakub Kicinski 1533254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1534254ef4d7SJiong Wang { 1535254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1536254ef4d7SJiong Wang 1537254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1538254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1539254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1540254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1541254ef4d7SJiong Wang 1542254ef4d7SJiong Wang return 0; 1543254ef4d7SJiong Wang } 1544254ef4d7SJiong Wang 1545d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1546d9ae7f2bSJakub Kicinski { 1547d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15483cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1549d9ae7f2bSJakub Kicinski 15503cae1319SJakub Kicinski if (insn->imm < 32) { 15513cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15523cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15533cae1319SJakub Kicinski SHF_SC_R_DSHF, 32 - insn->imm); 15543cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15553cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15563cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm); 15573cae1319SJakub Kicinski } else if (insn->imm == 32) { 15583cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, dst); 15593cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15603cae1319SJakub Kicinski } else if (insn->imm > 32) { 15613cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15623cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15633cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm - 32); 15643cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15653cae1319SJakub Kicinski } 1566d9ae7f2bSJakub Kicinski 1567d9ae7f2bSJakub Kicinski return 0; 1568d9ae7f2bSJakub Kicinski } 1569d9ae7f2bSJakub Kicinski 1570d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1571d9ae7f2bSJakub Kicinski { 1572d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15733cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1574d9ae7f2bSJakub Kicinski 15753cae1319SJakub Kicinski if (insn->imm < 32) { 15763cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15773cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15783cae1319SJakub Kicinski SHF_SC_R_DSHF, insn->imm); 15793cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15803cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15813cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm); 15823cae1319SJakub Kicinski } else if (insn->imm == 32) { 15833cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst, dst + 1); 15843cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15853cae1319SJakub Kicinski } else if (insn->imm > 32) { 15863cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15873cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15883cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm - 32); 15893cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15903cae1319SJakub Kicinski } 1591d9ae7f2bSJakub Kicinski 1592d9ae7f2bSJakub Kicinski return 0; 1593d9ae7f2bSJakub Kicinski } 1594d9ae7f2bSJakub Kicinski 1595d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1596d9ae7f2bSJakub Kicinski { 1597d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1598d9ae7f2bSJakub Kicinski 1599d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1600d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1601d9ae7f2bSJakub Kicinski 1602d9ae7f2bSJakub Kicinski return 0; 1603d9ae7f2bSJakub Kicinski } 1604d9ae7f2bSJakub Kicinski 1605d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1606d9ae7f2bSJakub Kicinski { 1607d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1608d9ae7f2bSJakub Kicinski 1609d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1610d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1611d9ae7f2bSJakub Kicinski 1612d9ae7f2bSJakub Kicinski return 0; 1613d9ae7f2bSJakub Kicinski } 1614d9ae7f2bSJakub Kicinski 1615d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1616d9ae7f2bSJakub Kicinski { 1617d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1618d9ae7f2bSJakub Kicinski } 1619d9ae7f2bSJakub Kicinski 1620d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1621d9ae7f2bSJakub Kicinski { 1622d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1623d9ae7f2bSJakub Kicinski } 1624d9ae7f2bSJakub Kicinski 1625d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1626d9ae7f2bSJakub Kicinski { 1627d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1628d9ae7f2bSJakub Kicinski } 1629d9ae7f2bSJakub Kicinski 1630d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1631d9ae7f2bSJakub Kicinski { 1632d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1633d9ae7f2bSJakub Kicinski } 1634d9ae7f2bSJakub Kicinski 1635d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1636d9ae7f2bSJakub Kicinski { 1637d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1638d9ae7f2bSJakub Kicinski } 1639d9ae7f2bSJakub Kicinski 1640d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1641d9ae7f2bSJakub Kicinski { 1642d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1643d9ae7f2bSJakub Kicinski } 1644d9ae7f2bSJakub Kicinski 1645d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1646d9ae7f2bSJakub Kicinski { 1647d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1648d9ae7f2bSJakub Kicinski } 1649d9ae7f2bSJakub Kicinski 1650d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1651d9ae7f2bSJakub Kicinski { 1652d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1653d9ae7f2bSJakub Kicinski } 1654d9ae7f2bSJakub Kicinski 1655d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1656d9ae7f2bSJakub Kicinski { 1657d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1658d9ae7f2bSJakub Kicinski } 1659d9ae7f2bSJakub Kicinski 1660d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1661d9ae7f2bSJakub Kicinski { 1662d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1663d9ae7f2bSJakub Kicinski } 1664d9ae7f2bSJakub Kicinski 1665254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1666254ef4d7SJiong Wang { 1667254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1668254ef4d7SJiong Wang 1669254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1670254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1671254ef4d7SJiong Wang 1672254ef4d7SJiong Wang return 0; 1673254ef4d7SJiong Wang } 1674254ef4d7SJiong Wang 1675d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1676d9ae7f2bSJakub Kicinski { 1677d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1678d9ae7f2bSJakub Kicinski 1679d9ae7f2bSJakub Kicinski if (!insn->imm) 1680d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1681d9ae7f2bSJakub Kicinski 1682d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1683d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1684d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1685d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1686d9ae7f2bSJakub Kicinski 1687d9ae7f2bSJakub Kicinski return 0; 1688d9ae7f2bSJakub Kicinski } 1689d9ae7f2bSJakub Kicinski 16903119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16913119d1fdSJakub Kicinski { 16923119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 16933119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 16943119d1fdSJakub Kicinski 16953119d1fdSJakub Kicinski switch (insn->imm) { 16963119d1fdSJakub Kicinski case 16: 16973119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 16983119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 16993119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 17003119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 17013119d1fdSJakub Kicinski 17023119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 17033119d1fdSJakub Kicinski break; 17043119d1fdSJakub Kicinski case 32: 17053119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 17063119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 17073119d1fdSJakub Kicinski break; 17083119d1fdSJakub Kicinski case 64: 17093119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 17103119d1fdSJakub Kicinski 17113119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 17123119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 17133119d1fdSJakub Kicinski break; 17143119d1fdSJakub Kicinski } 17153119d1fdSJakub Kicinski 17163119d1fdSJakub Kicinski return 0; 17173119d1fdSJakub Kicinski } 17183119d1fdSJakub Kicinski 1719d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1720d9ae7f2bSJakub Kicinski { 17219f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 17229f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 17239f16c8abSJakub Kicinski u8 dst; 17249f16c8abSJakub Kicinski 17259f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 17269f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 17279f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 17289f16c8abSJakub Kicinski 17299f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 17309f16c8abSJakub Kicinski 17319f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 17329f16c8abSJakub Kicinski if (imm_hi == imm_lo) 17339f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 17349f16c8abSJakub Kicinski else 17359f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 1736d9ae7f2bSJakub Kicinski 1737d9ae7f2bSJakub Kicinski return 0; 1738d9ae7f2bSJakub Kicinski } 1739d9ae7f2bSJakub Kicinski 1740d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1741d9ae7f2bSJakub Kicinski { 1742d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1743d9ae7f2bSJakub Kicinski return 0; 1744d9ae7f2bSJakub Kicinski } 1745d9ae7f2bSJakub Kicinski 1746d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1747d9ae7f2bSJakub Kicinski { 1748d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1749d9ae7f2bSJakub Kicinski } 1750d9ae7f2bSJakub Kicinski 1751d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1752d9ae7f2bSJakub Kicinski { 1753d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1754d9ae7f2bSJakub Kicinski } 1755d9ae7f2bSJakub Kicinski 1756d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1757d9ae7f2bSJakub Kicinski { 1758d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1759d9ae7f2bSJakub Kicinski } 1760d9ae7f2bSJakub Kicinski 1761d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1762d9ae7f2bSJakub Kicinski { 1763d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17640a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 1765d9ae7f2bSJakub Kicinski } 1766d9ae7f2bSJakub Kicinski 1767d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1768d9ae7f2bSJakub Kicinski { 1769d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17700a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 1771d9ae7f2bSJakub Kicinski } 1772d9ae7f2bSJakub Kicinski 1773d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1774d9ae7f2bSJakub Kicinski { 1775d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17760a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 1777d9ae7f2bSJakub Kicinski } 1778d9ae7f2bSJakub Kicinski 1779a82b23fbSJakub Kicinski static int 1780a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1781d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1782a82b23fbSJakub Kicinski { 1783d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1784b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 1785b14157eeSJakub Kicinski true, wrp_lmem_load); 1786a82b23fbSJakub Kicinski } 1787a82b23fbSJakub Kicinski 1788943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1789943c57b9SJakub Kicinski u8 size) 1790d9ae7f2bSJakub Kicinski { 1791bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1792bfddbc8aSJakub Kicinski 1793943c57b9SJakub Kicinski switch (meta->insn.off) { 1794c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 1795c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 1796943c57b9SJakub Kicinski return -EOPNOTSUPP; 1797bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 1798bfddbc8aSJakub Kicinski break; 1799c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 1800c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 1801bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1802bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1803bfddbc8aSJakub Kicinski break; 1804c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 1805c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 1806bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1807bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 1808bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1809943c57b9SJakub Kicinski break; 1810943c57b9SJakub Kicinski default: 1811d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1812943c57b9SJakub Kicinski } 1813943c57b9SJakub Kicinski 1814943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1815d9ae7f2bSJakub Kicinski 1816d9ae7f2bSJakub Kicinski return 0; 1817d9ae7f2bSJakub Kicinski } 1818d9ae7f2bSJakub Kicinski 1819943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1820943c57b9SJakub Kicinski u8 size) 1821d9ae7f2bSJakub Kicinski { 1822b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1823d9ae7f2bSJakub Kicinski 1824943c57b9SJakub Kicinski switch (meta->insn.off) { 1825c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 1826c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 1827c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1828c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1829943c57b9SJakub Kicinski break; 1830c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 1831c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 1832c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1833943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 1834943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1835943c57b9SJakub Kicinski break; 1836943c57b9SJakub Kicinski default: 1837943c57b9SJakub Kicinski return -EOPNOTSUPP; 1838943c57b9SJakub Kicinski } 1839d9ae7f2bSJakub Kicinski 1840943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1841d9ae7f2bSJakub Kicinski 1842d9ae7f2bSJakub Kicinski return 0; 1843d9ae7f2bSJakub Kicinski } 1844d9ae7f2bSJakub Kicinski 18452ca71441SJakub Kicinski static int 18462ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18472ca71441SJakub Kicinski unsigned int size) 18482ca71441SJakub Kicinski { 18492ca71441SJakub Kicinski swreg tmp_reg; 18502ca71441SJakub Kicinski 18512ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18522ca71441SJakub Kicinski 18533dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 18543dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18553dd43c33SJakub Kicinski } 18563dd43c33SJakub Kicinski 18573dd43c33SJakub Kicinski static int 18583dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18593dd43c33SJakub Kicinski unsigned int size) 18603dd43c33SJakub Kicinski { 18613dd43c33SJakub Kicinski swreg tmp_reg; 18623dd43c33SJakub Kicinski 18633dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18643dd43c33SJakub Kicinski 18653dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 18663dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18672ca71441SJakub Kicinski } 18682ca71441SJakub Kicinski 1869be759237SJiong Wang static void 1870be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 1871be759237SJiong Wang struct nfp_insn_meta *meta) 1872be759237SJiong Wang { 1873be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 1874be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 1875be759237SJiong Wang swreg src_base, off; 1876be759237SJiong Wang u8 xfer_num, len; 1877be759237SJiong Wang bool indir; 1878be759237SJiong Wang 1879be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 1880be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 1881be759237SJiong Wang len = range_end - range_start; 1882be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 1883be759237SJiong Wang 1884be759237SJiong Wang indir = len > 8 * REG_WIDTH; 1885be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 1886be759237SJiong Wang if (indir) 1887be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 1888be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 1889be759237SJiong Wang 1890be759237SJiong Wang /* Cache memory into transfer-in registers. */ 1891be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 1892b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 1893be759237SJiong Wang } 1894be759237SJiong Wang 1895be759237SJiong Wang static int 189691ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 189791ff69e8SJiong Wang struct nfp_insn_meta *meta, 189891ff69e8SJiong Wang unsigned int size) 189991ff69e8SJiong Wang { 190091ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 190191ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 190291ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 190391ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 190491ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 190591ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 190691ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 190791ff69e8SJiong Wang 190891ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 190991ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 191091ff69e8SJiong Wang src_lo = reg_xfer(idx); 191191ff69e8SJiong Wang 191291ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 191391ff69e8SJiong Wang if (size > REG_WIDTH - off) { 191491ff69e8SJiong Wang /* Calculate the part in the second register. */ 191591ff69e8SJiong Wang len_lo = REG_WIDTH - off; 191691ff69e8SJiong Wang len_mid = size - len_lo; 191791ff69e8SJiong Wang 191891ff69e8SJiong Wang /* Calculate the part in the third register. */ 191991ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 192091ff69e8SJiong Wang len_mid = REG_WIDTH; 192191ff69e8SJiong Wang } 192291ff69e8SJiong Wang 192391ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 192491ff69e8SJiong Wang 192591ff69e8SJiong Wang if (!len_mid) { 192691ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 192791ff69e8SJiong Wang return 0; 192891ff69e8SJiong Wang } 192991ff69e8SJiong Wang 193091ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 193191ff69e8SJiong Wang 193291ff69e8SJiong Wang if (size <= REG_WIDTH) { 193391ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 193491ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 193591ff69e8SJiong Wang } else { 193691ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 193791ff69e8SJiong Wang 193891ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 193991ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 194091ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 194191ff69e8SJiong Wang REG_WIDTH - len_lo); 194291ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 194391ff69e8SJiong Wang len_lo); 194491ff69e8SJiong Wang } 194591ff69e8SJiong Wang 194691ff69e8SJiong Wang return 0; 194791ff69e8SJiong Wang } 194891ff69e8SJiong Wang 194991ff69e8SJiong Wang static int 1950be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 1951be759237SJiong Wang struct nfp_insn_meta *meta, 1952be759237SJiong Wang unsigned int size) 1953be759237SJiong Wang { 1954be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 1955be759237SJiong Wang u8 dst_gpr, idx; 1956be759237SJiong Wang 1957be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 1958be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 1959be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 1960be759237SJiong Wang dst_lo = reg_both(dst_gpr); 1961be759237SJiong Wang src_lo = reg_xfer(idx); 1962be759237SJiong Wang 1963be759237SJiong Wang if (size < REG_WIDTH) { 1964be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 1965be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1966be759237SJiong Wang } else if (size == REG_WIDTH) { 1967be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1968be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1969be759237SJiong Wang } else { 1970be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 1971be759237SJiong Wang 1972be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1973be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 1974be759237SJiong Wang } 1975be759237SJiong Wang 1976be759237SJiong Wang return 0; 1977be759237SJiong Wang } 1978be759237SJiong Wang 1979be759237SJiong Wang static int 1980be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 1981be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 1982be759237SJiong Wang { 1983be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 1984be759237SJiong Wang 198591ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 1986be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 198791ff69e8SJiong Wang 198891ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 1989be759237SJiong Wang } 1990be759237SJiong Wang 19912ca71441SJakub Kicinski static int 19922ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 19932ca71441SJakub Kicinski unsigned int size) 19942ca71441SJakub Kicinski { 19959879a381SJiong Wang if (meta->ldst_gather_len) 19969879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 19979879a381SJiong Wang 19982ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 1999012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 20002ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 20012ca71441SJakub Kicinski else 20022ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 20032ca71441SJakub Kicinski } 20042ca71441SJakub Kicinski 2005be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2006be759237SJiong Wang if (meta->pkt_cache.range_end) { 2007be759237SJiong Wang if (meta->pkt_cache.do_init) 2008be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2009be759237SJiong Wang 2010be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2011be759237SJiong Wang } else { 20122ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2013be759237SJiong Wang } 2014be759237SJiong Wang } 20152ca71441SJakub Kicinski 2016a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2017d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2018d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2019a82b23fbSJakub Kicinski 20203dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 20213dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 20223dd43c33SJakub Kicinski 20232ca71441SJakub Kicinski return -EOPNOTSUPP; 20242ca71441SJakub Kicinski } 20252ca71441SJakub Kicinski 20262ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20272ca71441SJakub Kicinski { 20282ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 20292ca71441SJakub Kicinski } 20302ca71441SJakub Kicinski 20312ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20322ca71441SJakub Kicinski { 20332ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 20342ca71441SJakub Kicinski } 20352ca71441SJakub Kicinski 2036d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2037d9ae7f2bSJakub Kicinski { 20382ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 20392ca71441SJakub Kicinski } 20402ca71441SJakub Kicinski 20412ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20422ca71441SJakub Kicinski { 20432ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2044d9ae7f2bSJakub Kicinski } 2045d9ae7f2bSJakub Kicinski 2046e663fe38SJakub Kicinski static int 2047e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2048e663fe38SJakub Kicinski unsigned int size) 2049d9ae7f2bSJakub Kicinski { 2050e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2051e663fe38SJakub Kicinski swreg off_reg; 2052e663fe38SJakub Kicinski 2053e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2054e663fe38SJakub Kicinski 2055e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2056e663fe38SJakub Kicinski imm, size); 2057e663fe38SJakub Kicinski } 2058e663fe38SJakub Kicinski 2059e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2060e663fe38SJakub Kicinski unsigned int size) 2061e663fe38SJakub Kicinski { 2062e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2063e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2064e663fe38SJakub Kicinski 2065d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2066d9ae7f2bSJakub Kicinski } 2067d9ae7f2bSJakub Kicinski 2068e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2069d9ae7f2bSJakub Kicinski { 2070e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2071e663fe38SJakub Kicinski } 2072e663fe38SJakub Kicinski 2073e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2074e663fe38SJakub Kicinski { 2075e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2076e663fe38SJakub Kicinski } 2077e663fe38SJakub Kicinski 2078e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2079e663fe38SJakub Kicinski { 2080e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2081e663fe38SJakub Kicinski } 2082e663fe38SJakub Kicinski 2083e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2084e663fe38SJakub Kicinski { 2085e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2086e663fe38SJakub Kicinski } 2087e663fe38SJakub Kicinski 2088e663fe38SJakub Kicinski static int 2089e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2090e663fe38SJakub Kicinski unsigned int size) 2091e663fe38SJakub Kicinski { 2092e663fe38SJakub Kicinski swreg off_reg; 2093e663fe38SJakub Kicinski 2094e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2095e663fe38SJakub Kicinski 2096e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2097e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2098e663fe38SJakub Kicinski } 2099e663fe38SJakub Kicinski 2100e663fe38SJakub Kicinski static int 2101ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2102d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2103ee9133a8SJakub Kicinski { 2104d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2105b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2106b14157eeSJakub Kicinski false, wrp_lmem_store); 2107ee9133a8SJakub Kicinski } 2108ee9133a8SJakub Kicinski 2109ee9133a8SJakub Kicinski static int 2110e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2111e663fe38SJakub Kicinski unsigned int size) 2112e663fe38SJakub Kicinski { 2113e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2114e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2115e663fe38SJakub Kicinski 2116ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2117d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2118d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2119ee9133a8SJakub Kicinski 2120d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2121d9ae7f2bSJakub Kicinski } 2122d9ae7f2bSJakub Kicinski 2123e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2124e663fe38SJakub Kicinski { 2125e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2126e663fe38SJakub Kicinski } 2127e663fe38SJakub Kicinski 2128e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2129e663fe38SJakub Kicinski { 2130e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2131e663fe38SJakub Kicinski } 2132e663fe38SJakub Kicinski 2133d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2134d9ae7f2bSJakub Kicinski { 2135e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2136e663fe38SJakub Kicinski } 21372ca71441SJakub Kicinski 2138e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2139e663fe38SJakub Kicinski { 2140e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2141d9ae7f2bSJakub Kicinski } 2142d9ae7f2bSJakub Kicinski 2143dcb0c27fSJakub Kicinski static int 2144dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2145dcb0c27fSJakub Kicinski { 2146dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2147dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 214841aed09cSJakub Kicinski unsigned int full_add, out; 214941aed09cSJakub Kicinski swreg addra, addrb, off; 2150dcb0c27fSJakub Kicinski 2151dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2152dcb0c27fSJakub Kicinski 215341aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 215441aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 215541aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 215641aed09cSJakub Kicinski * code for both. 215741aed09cSJakub Kicinski */ 215841aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 215941aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 216041aed09cSJakub Kicinski 216141aed09cSJakub Kicinski if (meta->insn.off) { 216241aed09cSJakub Kicinski out += 2; 216341aed09cSJakub Kicinski full_add += 2; 216441aed09cSJakub Kicinski } 216541aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 216641aed09cSJakub Kicinski out += 3; 216741aed09cSJakub Kicinski full_add += 3; 216841aed09cSJakub Kicinski } 216941aed09cSJakub Kicinski if (meta->xadd_over_16bit) 217041aed09cSJakub Kicinski out += 2 + is64; 217141aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 217241aed09cSJakub Kicinski out += 5; 217341aed09cSJakub Kicinski full_add += 5; 217441aed09cSJakub Kicinski } 217541aed09cSJakub Kicinski 217641aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 217741aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 217841aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 217941aed09cSJakub Kicinski 218041aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 218141aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 218241aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 218341aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 218441aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 218541aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 218641aed09cSJakub Kicinski /* defer for add */ 218741aed09cSJakub Kicinski } 218841aed09cSJakub Kicinski 2189dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2190dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2191dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2192dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2193dcb0c27fSJakub Kicinski } else { 2194dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2195dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2196dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2197dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2198dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2199dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2200dcb0c27fSJakub Kicinski } 2201dcb0c27fSJakub Kicinski 220241aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 220341aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 220441aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 220541aed09cSJakub Kicinski 2206dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2207dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2208dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2209dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2210dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2211dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2212b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2213dcb0c27fSJakub Kicinski 221441aed09cSJakub Kicinski if (meta->xadd_over_16bit) 221541aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 221641aed09cSJakub Kicinski } 221741aed09cSJakub Kicinski 221841aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 221941aed09cSJakub Kicinski return -EINVAL; 222041aed09cSJakub Kicinski 222141aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 222241aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 222341aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 222441aed09cSJakub Kicinski addra, addrb, is64 << 2, 222541aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 222641aed09cSJakub Kicinski 222741aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 222841aed09cSJakub Kicinski if (is64) 222941aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 223041aed09cSJakub Kicinski } 223141aed09cSJakub Kicinski 223241aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 223341aed09cSJakub Kicinski return -EINVAL; 223441aed09cSJakub Kicinski 2235dcb0c27fSJakub Kicinski return 0; 2236dcb0c27fSJakub Kicinski } 2237dcb0c27fSJakub Kicinski 2238dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2239dcb0c27fSJakub Kicinski { 2240dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2241dcb0c27fSJakub Kicinski } 2242dcb0c27fSJakub Kicinski 2243dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2244dcb0c27fSJakub Kicinski { 2245dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2246dcb0c27fSJakub Kicinski } 2247dcb0c27fSJakub Kicinski 2248d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2249d9ae7f2bSJakub Kicinski { 2250d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2251d9ae7f2bSJakub Kicinski 2252d9ae7f2bSJakub Kicinski return 0; 2253d9ae7f2bSJakub Kicinski } 2254d9ae7f2bSJakub Kicinski 2255d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2256d9ae7f2bSJakub Kicinski { 2257d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2258d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2259b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2260b3f868dfSJakub Kicinski 2261b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2262b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2263d9ae7f2bSJakub Kicinski 2264d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2265d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2266d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2267d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2268d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2269d9ae7f2bSJakub Kicinski } 2270d9ae7f2bSJakub Kicinski 2271d9ae7f2bSJakub Kicinski if (imm >> 32) { 2272d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2273d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2274d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2275d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2276d9ae7f2bSJakub Kicinski } 2277d9ae7f2bSJakub Kicinski 2278d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2279d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2280d9ae7f2bSJakub Kicinski 2281d9ae7f2bSJakub Kicinski return 0; 2282d9ae7f2bSJakub Kicinski } 2283d9ae7f2bSJakub Kicinski 2284d9ae7f2bSJakub Kicinski static int jgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2285d9ae7f2bSJakub Kicinski { 228626fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true); 2287d9ae7f2bSJakub Kicinski } 2288d9ae7f2bSJakub Kicinski 2289d9ae7f2bSJakub Kicinski static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2290d9ae7f2bSJakub Kicinski { 229126fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false); 2292d9ae7f2bSJakub Kicinski } 2293d9ae7f2bSJakub Kicinski 22945dd294d4SDaniel Borkmann static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22955dd294d4SDaniel Borkmann { 229626fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, false); 22975dd294d4SDaniel Borkmann } 22985dd294d4SDaniel Borkmann 22995dd294d4SDaniel Borkmann static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23005dd294d4SDaniel Borkmann { 230126fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); 23025dd294d4SDaniel Borkmann } 23035dd294d4SDaniel Borkmann 2304c087aa8bSNic Viljoen static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2305c087aa8bSNic Viljoen { 2306c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true); 2307c087aa8bSNic Viljoen } 2308c087aa8bSNic Viljoen 2309c087aa8bSNic Viljoen static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2310c087aa8bSNic Viljoen { 2311c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false); 2312c087aa8bSNic Viljoen } 2313c087aa8bSNic Viljoen 2314c087aa8bSNic Viljoen static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2315c087aa8bSNic Viljoen { 2316c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false); 2317c087aa8bSNic Viljoen } 2318c087aa8bSNic Viljoen 2319c087aa8bSNic Viljoen static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2320c087aa8bSNic Viljoen { 2321c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true); 2322c087aa8bSNic Viljoen } 2323c087aa8bSNic Viljoen 2324d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2325d9ae7f2bSJakub Kicinski { 2326d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2327d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2328b3f868dfSJakub Kicinski swreg tmp_reg; 2329d9ae7f2bSJakub Kicinski 2330d9ae7f2bSJakub Kicinski if (!imm) { 2331d9ae7f2bSJakub Kicinski meta->skip = true; 2332d9ae7f2bSJakub Kicinski return 0; 2333d9ae7f2bSJakub Kicinski } 2334d9ae7f2bSJakub Kicinski 2335d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2336d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2337d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2338d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2339d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2340d9ae7f2bSJakub Kicinski } 2341d9ae7f2bSJakub Kicinski 2342d9ae7f2bSJakub Kicinski if (imm >> 32) { 2343d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2344d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2345d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2346d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2347d9ae7f2bSJakub Kicinski } 2348d9ae7f2bSJakub Kicinski 2349d9ae7f2bSJakub Kicinski return 0; 2350d9ae7f2bSJakub Kicinski } 2351d9ae7f2bSJakub Kicinski 2352d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2353d9ae7f2bSJakub Kicinski { 2354d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2355d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2356b3f868dfSJakub Kicinski swreg tmp_reg; 2357d9ae7f2bSJakub Kicinski 2358d9ae7f2bSJakub Kicinski if (!imm) { 2359d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2360d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2361d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 236282837370SJakub Kicinski return 0; 2363d9ae7f2bSJakub Kicinski } 2364d9ae7f2bSJakub Kicinski 2365d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2366d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2367d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2368d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2369d9ae7f2bSJakub Kicinski 2370d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2371d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2372d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2373d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2374d9ae7f2bSJakub Kicinski 2375d9ae7f2bSJakub Kicinski return 0; 2376d9ae7f2bSJakub Kicinski } 2377d9ae7f2bSJakub Kicinski 2378d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2379d9ae7f2bSJakub Kicinski { 2380d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2381d9ae7f2bSJakub Kicinski 2382d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2383d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2384d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2385d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2386d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2387d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2388d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2389d9ae7f2bSJakub Kicinski 2390d9ae7f2bSJakub Kicinski return 0; 2391d9ae7f2bSJakub Kicinski } 2392d9ae7f2bSJakub Kicinski 2393d9ae7f2bSJakub Kicinski static int jgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2394d9ae7f2bSJakub Kicinski { 239526fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true); 2396d9ae7f2bSJakub Kicinski } 2397d9ae7f2bSJakub Kicinski 2398d9ae7f2bSJakub Kicinski static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2399d9ae7f2bSJakub Kicinski { 240026fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false); 2401d9ae7f2bSJakub Kicinski } 2402d9ae7f2bSJakub Kicinski 24035dd294d4SDaniel Borkmann static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24045dd294d4SDaniel Borkmann { 240526fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, false); 24065dd294d4SDaniel Borkmann } 24075dd294d4SDaniel Borkmann 24085dd294d4SDaniel Borkmann static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24095dd294d4SDaniel Borkmann { 241026fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); 24115dd294d4SDaniel Borkmann } 24125dd294d4SDaniel Borkmann 2413c087aa8bSNic Viljoen static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2414c087aa8bSNic Viljoen { 2415c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true); 2416c087aa8bSNic Viljoen } 2417c087aa8bSNic Viljoen 2418c087aa8bSNic Viljoen static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2419c087aa8bSNic Viljoen { 2420c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false); 2421c087aa8bSNic Viljoen } 2422c087aa8bSNic Viljoen 2423c087aa8bSNic Viljoen static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2424c087aa8bSNic Viljoen { 2425c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false); 2426c087aa8bSNic Viljoen } 2427c087aa8bSNic Viljoen 2428c087aa8bSNic Viljoen static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2429c087aa8bSNic Viljoen { 2430c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, true); 2431c087aa8bSNic Viljoen } 2432c087aa8bSNic Viljoen 2433d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2434d9ae7f2bSJakub Kicinski { 2435d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2436d9ae7f2bSJakub Kicinski } 2437d9ae7f2bSJakub Kicinski 2438d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2439d9ae7f2bSJakub Kicinski { 2440d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2441d9ae7f2bSJakub Kicinski } 2442d9ae7f2bSJakub Kicinski 24432cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24442cb230bdSJakub Kicinski { 24452cb230bdSJakub Kicinski switch (meta->insn.imm) { 24460d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 24470d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 244877a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 244944d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 2450bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 2451fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 2452df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 2453df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 24542cb230bdSJakub Kicinski default: 24552cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 24562cb230bdSJakub Kicinski return -EOPNOTSUPP; 24572cb230bdSJakub Kicinski } 24582cb230bdSJakub Kicinski } 24592cb230bdSJakub Kicinski 2460d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2461d9ae7f2bSJakub Kicinski { 2462e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2463d9ae7f2bSJakub Kicinski 2464d9ae7f2bSJakub Kicinski return 0; 2465d9ae7f2bSJakub Kicinski } 2466d9ae7f2bSJakub Kicinski 2467d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2468d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2469d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2470d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2471d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2472d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2473d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2474d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2475d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2476d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2477d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2478d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2479d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2480254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2481d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2482d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2483d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2484d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2485d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2486d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2487d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2488d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2489d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2490d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2491d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2492d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2493d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2494d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2495254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2496d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 24973119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2498d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2499d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2500d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2501d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2502d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2503d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2504d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 25052ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 25062ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2507d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 25082ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2509e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2510e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2511d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2512e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2513dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 2514dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 2515e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2516e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2517e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2518e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2519d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2520d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 2521d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = jgt_imm, 2522d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, 25235dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, 25245dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, 2525c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_K] = jsgt_imm, 2526c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_K] = jsge_imm, 2527c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_K] = jslt_imm, 2528c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_K] = jsle_imm, 2529d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2530d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2531d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 2532d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = jgt_reg, 2533d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, 25345dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, 25355dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, 2536c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_X] = jsgt_reg, 2537c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_X] = jsge_reg, 2538c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_X] = jslt_reg, 2539c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_X] = jsle_reg, 2540d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2541d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 25422cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2543d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2544d9ae7f2bSJakub Kicinski }; 2545d9ae7f2bSJakub Kicinski 2546d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2547d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2548d9ae7f2bSJakub Kicinski { 25495b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2550854dc87dSJiong Wang u32 idx, br_idx; 2551d9ae7f2bSJakub Kicinski 2552854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2553d9ae7f2bSJakub Kicinski if (meta->skip) 2554d9ae7f2bSJakub Kicinski continue; 25552cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 25562cb230bdSJakub Kicinski continue; 2557d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2558d9ae7f2bSJakub Kicinski continue; 2559d9ae7f2bSJakub Kicinski 25605b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 25612314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 25625b674140SJiong Wang else 25632314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2564854dc87dSJiong Wang 2565d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2566d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2567d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2568d9ae7f2bSJakub Kicinski return -ELOOP; 2569d9ae7f2bSJakub Kicinski } 2570d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 25712314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 25722314fe9eSJakub Kicinski RELO_BR_REL) 2573d9ae7f2bSJakub Kicinski continue; 2574d9ae7f2bSJakub Kicinski 25755b674140SJiong Wang if (!meta->jmp_dst) { 25765b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2577d9ae7f2bSJakub Kicinski return -ELOOP; 2578d9ae7f2bSJakub Kicinski } 2579d9ae7f2bSJakub Kicinski 25805b674140SJiong Wang jmp_dst = meta->jmp_dst; 2581854dc87dSJiong Wang 25825b674140SJiong Wang if (jmp_dst->skip) { 2583d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2584d9ae7f2bSJakub Kicinski return -ELOOP; 2585d9ae7f2bSJakub Kicinski } 2586d9ae7f2bSJakub Kicinski 25872314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2588d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2589d9ae7f2bSJakub Kicinski continue; 25905b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2591d9ae7f2bSJakub Kicinski } 2592d9ae7f2bSJakub Kicinski } 2593d9ae7f2bSJakub Kicinski 2594d9ae7f2bSJakub Kicinski return 0; 2595d9ae7f2bSJakub Kicinski } 2596d9ae7f2bSJakub Kicinski 2597d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2598d9ae7f2bSJakub Kicinski { 259918e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 260018e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 260118e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2602d9ae7f2bSJakub Kicinski } 2603d9ae7f2bSJakub Kicinski 2604d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2605d9ae7f2bSJakub Kicinski { 2606d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2607d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2608d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2609d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2610d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2611d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2612d9ae7f2bSJakub Kicinski * 2613d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2614d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2615d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2616d9ae7f2bSJakub Kicinski * packets up the stack. 2617d9ae7f2bSJakub Kicinski */ 2618d9ae7f2bSJakub Kicinski /* Target for aborts */ 2619d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2620d9ae7f2bSJakub Kicinski 2621e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2622d9ae7f2bSJakub Kicinski 2623c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2624d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2625d9ae7f2bSJakub Kicinski 2626d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2627d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2628d9ae7f2bSJakub Kicinski 2629d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2630d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2631d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2632c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2633d9ae7f2bSJakub Kicinski 2634d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2635d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2636d9ae7f2bSJakub Kicinski 2637d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2638d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2639d9ae7f2bSJakub Kicinski 2640d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2641d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2642d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2643d9ae7f2bSJakub Kicinski 2644d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2645d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2646d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2647d9ae7f2bSJakub Kicinski 2648e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2649d9ae7f2bSJakub Kicinski 2650d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2651d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2652d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2653d9ae7f2bSJakub Kicinski } 2654d9ae7f2bSJakub Kicinski 2655d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2656d9ae7f2bSJakub Kicinski { 2657d9ae7f2bSJakub Kicinski /* XDP return codes: 2658d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2659d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2660d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2661d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2662d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2663d9ae7f2bSJakub Kicinski */ 2664d9ae7f2bSJakub Kicinski /* Target for aborts */ 2665d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2666d9ae7f2bSJakub Kicinski 2667e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2668d9ae7f2bSJakub Kicinski 2669c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2670d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2671d9ae7f2bSJakub Kicinski 2672d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2673d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2674d9ae7f2bSJakub Kicinski 2675d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2676d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2677d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2678d9ae7f2bSJakub Kicinski 2679d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2680d9ae7f2bSJakub Kicinski 2681d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2682d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2683d9ae7f2bSJakub Kicinski 2684d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2685d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2686d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2687d9ae7f2bSJakub Kicinski 2688e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2689d9ae7f2bSJakub Kicinski 2690c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2691d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2692d9ae7f2bSJakub Kicinski } 2693d9ae7f2bSJakub Kicinski 2694d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2695d9ae7f2bSJakub Kicinski { 2696012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2697012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2698d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2699d9ae7f2bSJakub Kicinski break; 2700012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2701d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2702d9ae7f2bSJakub Kicinski break; 2703012bb8a8SJakub Kicinski default: 2704012bb8a8SJakub Kicinski WARN_ON(1); 2705d9ae7f2bSJakub Kicinski } 2706d9ae7f2bSJakub Kicinski } 2707d9ae7f2bSJakub Kicinski 2708d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2709d9ae7f2bSJakub Kicinski { 2710d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2711ff42bb9fSJakub Kicinski int err; 2712d9ae7f2bSJakub Kicinski 2713d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2714d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2715d9ae7f2bSJakub Kicinski return nfp_prog->error; 2716d9ae7f2bSJakub Kicinski 2717d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2718d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2719d9ae7f2bSJakub Kicinski 2720d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2721d9ae7f2bSJakub Kicinski 2722d9ae7f2bSJakub Kicinski if (meta->skip) { 2723d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2724d9ae7f2bSJakub Kicinski continue; 2725d9ae7f2bSJakub Kicinski } 2726d9ae7f2bSJakub Kicinski 2727d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2728d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2729d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2730d9ae7f2bSJakub Kicinski if (!cb) 2731d9ae7f2bSJakub Kicinski return -ENOENT; 2732d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2733d9ae7f2bSJakub Kicinski if (err) 2734d9ae7f2bSJakub Kicinski return err; 2735d9ae7f2bSJakub Kicinski 2736d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2737d9ae7f2bSJakub Kicinski } 2738d9ae7f2bSJakub Kicinski 2739854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 2740854dc87dSJiong Wang 2741d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 2742d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2743d9ae7f2bSJakub Kicinski return nfp_prog->error; 2744d9ae7f2bSJakub Kicinski 2745ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 27461c03e03fSJakub Kicinski if (nfp_prog->error) 27471c03e03fSJakub Kicinski return nfp_prog->error; 27481c03e03fSJakub Kicinski 2749d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 2750d9ae7f2bSJakub Kicinski } 2751d9ae7f2bSJakub Kicinski 2752d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 2753d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 2754d9ae7f2bSJakub Kicinski { 2755d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2756d9ae7f2bSJakub Kicinski 2757d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2758d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 2759d9ae7f2bSJakub Kicinski 2760d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 2761d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 2762d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 2763d9ae7f2bSJakub Kicinski continue; 2764d9ae7f2bSJakub Kicinski 2765d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 2766d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 2767d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 2768d9ae7f2bSJakub Kicinski meta->skip = true; 2769d9ae7f2bSJakub Kicinski 2770d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 2771d9ae7f2bSJakub Kicinski if (!meta->skip) 2772d9ae7f2bSJakub Kicinski return; 2773d9ae7f2bSJakub Kicinski } 2774d9ae7f2bSJakub Kicinski } 2775d9ae7f2bSJakub Kicinski 2776d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 2777d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 2778d9ae7f2bSJakub Kicinski { 2779d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 2780d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 2781d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 2782d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 2783d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 2784d9ae7f2bSJakub Kicinski }; 2785d9ae7f2bSJakub Kicinski 2786d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 2787d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 2788d9ae7f2bSJakub Kicinski 2789d9ae7f2bSJakub Kicinski insn = meta1->insn; 2790d9ae7f2bSJakub Kicinski next = meta2->insn; 2791d9ae7f2bSJakub Kicinski 2792d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2793d9ae7f2bSJakub Kicinski continue; 2794d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2795d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2796d9ae7f2bSJakub Kicinski continue; 2797d9ae7f2bSJakub Kicinski 2798d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 2799d9ae7f2bSJakub Kicinski continue; 2800d9ae7f2bSJakub Kicinski 2801d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 2802d9ae7f2bSJakub Kicinski continue; 2803d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 2804d9ae7f2bSJakub Kicinski continue; 2805d9ae7f2bSJakub Kicinski 2806d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 2807d9ae7f2bSJakub Kicinski continue; 2808d9ae7f2bSJakub Kicinski 28091266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 28101266f5d6SJiong Wang continue; 28111266f5d6SJiong Wang 2812d9ae7f2bSJakub Kicinski meta2->skip = true; 2813d9ae7f2bSJakub Kicinski } 2814d9ae7f2bSJakub Kicinski } 2815d9ae7f2bSJakub Kicinski 2816d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 2817d9ae7f2bSJakub Kicinski { 2818d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 2819d9ae7f2bSJakub Kicinski 2820d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 2821d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 2822d9ae7f2bSJakub Kicinski 2823d9ae7f2bSJakub Kicinski insn = meta1->insn; 2824d9ae7f2bSJakub Kicinski next1 = meta2->insn; 2825d9ae7f2bSJakub Kicinski next2 = meta3->insn; 2826d9ae7f2bSJakub Kicinski 2827d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2828d9ae7f2bSJakub Kicinski continue; 2829d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2830d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2831d9ae7f2bSJakub Kicinski continue; 2832d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 2833d9ae7f2bSJakub Kicinski continue; 2834d9ae7f2bSJakub Kicinski 2835d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 2836d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 2837d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 2838d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 2839d9ae7f2bSJakub Kicinski continue; 2840d9ae7f2bSJakub Kicinski 2841d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 2842d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 2843d9ae7f2bSJakub Kicinski continue; 2844d9ae7f2bSJakub Kicinski 2845d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 2846d9ae7f2bSJakub Kicinski continue; 2847d9ae7f2bSJakub Kicinski 284829fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 284929fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 285029fe46efSJiong Wang continue; 285129fe46efSJiong Wang 2852d9ae7f2bSJakub Kicinski meta2->skip = true; 2853d9ae7f2bSJakub Kicinski meta3->skip = true; 2854d9ae7f2bSJakub Kicinski } 2855d9ae7f2bSJakub Kicinski } 2856d9ae7f2bSJakub Kicinski 28576bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 28586bc7103cSJiong Wang * 28596bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 28606bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 28616bc7103cSJiong Wang * 28626bc7103cSJiong Wang * The destination register of load and source register of store should 28636bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 28646bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 28656bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 28666bc7103cSJiong Wang */ 28676bc7103cSJiong Wang static bool 28686bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 28696bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 28706bc7103cSJiong Wang { 28716bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 28726bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 28736bc7103cSJiong Wang 28746bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 28756bc7103cSJiong Wang return false; 28766bc7103cSJiong Wang 28776bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 28786bc7103cSJiong Wang return false; 28796bc7103cSJiong Wang 28806bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 28816bc7103cSJiong Wang return false; 28826bc7103cSJiong Wang 28836bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 28846bc7103cSJiong Wang return false; 28856bc7103cSJiong Wang 28866bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 28876bc7103cSJiong Wang return false; 28886bc7103cSJiong Wang 28896bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 28906bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 28916bc7103cSJiong Wang return false; 28926bc7103cSJiong Wang 28936bc7103cSJiong Wang return true; 28946bc7103cSJiong Wang } 28956bc7103cSJiong Wang 28966bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 28976bc7103cSJiong Wang * 28986bc7103cSJiong Wang * - Their address base registers are the same. 28996bc7103cSJiong Wang * - Their address offsets are in the same order. 29006bc7103cSJiong Wang * - They operate at the same memory width. 29016bc7103cSJiong Wang * - There is no jump into the middle of them. 29026bc7103cSJiong Wang */ 29036bc7103cSJiong Wang static bool 29046bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 29056bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 29066bc7103cSJiong Wang struct bpf_insn *prev_ld, 29076bc7103cSJiong Wang struct bpf_insn *prev_st) 29086bc7103cSJiong Wang { 29096bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 29106bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 29116bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 29126bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 29136bc7103cSJiong Wang 29146bc7103cSJiong Wang /* This pair is the start pair. */ 29156bc7103cSJiong Wang if (!prev_ld) 29166bc7103cSJiong Wang return true; 29176bc7103cSJiong Wang 29186bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 29196bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 29206bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 29216bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 29226bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 29236bc7103cSJiong Wang prev_ld_off = prev_ld->off; 29246bc7103cSJiong Wang prev_st_off = prev_st->off; 29256bc7103cSJiong Wang 29266bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 29276bc7103cSJiong Wang return false; 29286bc7103cSJiong Wang 29296bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 29306bc7103cSJiong Wang return false; 29316bc7103cSJiong Wang 29326bc7103cSJiong Wang if (curr_size != prev_size) 29336bc7103cSJiong Wang return false; 29346bc7103cSJiong Wang 29356bc7103cSJiong Wang /* There is jump to the head of this pair. */ 29366bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 29376bc7103cSJiong Wang return false; 29386bc7103cSJiong Wang 29396bc7103cSJiong Wang /* Both in ascending order. */ 29406bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 29416bc7103cSJiong Wang prev_st_off + prev_size == st->off) 29426bc7103cSJiong Wang return true; 29436bc7103cSJiong Wang 29446bc7103cSJiong Wang /* Both in descending order. */ 29456bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 29466bc7103cSJiong Wang st->off + curr_size == prev_st_off) 29476bc7103cSJiong Wang return true; 29486bc7103cSJiong Wang 29496bc7103cSJiong Wang return false; 29506bc7103cSJiong Wang } 29516bc7103cSJiong Wang 29526bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 29536bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 29546bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 29556bc7103cSJiong Wang * as an memory copy. 29566bc7103cSJiong Wang */ 29576bc7103cSJiong Wang static bool 29586bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 29596bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 29606bc7103cSJiong Wang { 29616bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 29626bc7103cSJiong Wang 29636bc7103cSJiong Wang /* Different pointer types does not overlap. */ 29646bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 29656bc7103cSJiong Wang return false; 29666bc7103cSJiong Wang 29676bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 29686bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 29696bc7103cSJiong Wang return true; 29706bc7103cSJiong Wang 29716bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 29726bc7103cSJiong Wang * base register. 29736bc7103cSJiong Wang */ 29746bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 29756bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 29766bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 29776bc7103cSJiong Wang 29786bc7103cSJiong Wang /* Ascending order cross. */ 29796bc7103cSJiong Wang if (ld_off > head_ld_off && 29806bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 29816bc7103cSJiong Wang return true; 29826bc7103cSJiong Wang 29836bc7103cSJiong Wang /* Descending order cross. */ 29846bc7103cSJiong Wang if (ld_off < head_ld_off && 29856bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 29866bc7103cSJiong Wang return true; 29876bc7103cSJiong Wang 29886bc7103cSJiong Wang return false; 29896bc7103cSJiong Wang } 29906bc7103cSJiong Wang 29916bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 29926bc7103cSJiong Wang * 29936bc7103cSJiong Wang * load R, [regA + offA] 29946bc7103cSJiong Wang * store [regB + offB], R 29956bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 29966bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 29976bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 29986bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 29996bc7103cSJiong Wang * ... 30006bc7103cSJiong Wang * 30016bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 30026bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 30036bc7103cSJiong Wang */ 30046bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 30056bc7103cSJiong Wang { 30066bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 30076bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 30086bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 30096bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 30106bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 30116bc7103cSJiong Wang u8 count = 0; 30126bc7103cSJiong Wang 30136bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 30146bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 30156bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 30166bc7103cSJiong Wang 30176bc7103cSJiong Wang /* Reset record status if any of the following if true: 30186bc7103cSJiong Wang * - The current insn pair is not load/store. 30196bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 30206bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 30216bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 30226bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 30236bc7103cSJiong Wang * single NFP CPP command can transfer. 30246bc7103cSJiong Wang */ 30256bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 30266bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 30276bc7103cSJiong Wang prev_st) || 30286bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 30296bc7103cSJiong Wang head_st_meta) || 30306bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 30316bc7103cSJiong Wang if (!count) 30326bc7103cSJiong Wang continue; 30336bc7103cSJiong Wang 30346bc7103cSJiong Wang if (count > 1) { 30356bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 30366bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 30376bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 30386bc7103cSJiong Wang 30396bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 30406bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 30416bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 30426bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 30436bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 30446bc7103cSJiong Wang } 30456bc7103cSJiong Wang 30466bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 30476bc7103cSJiong Wang head_st_meta->skip = true; 30486bc7103cSJiong Wang } else { 30496bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 30506bc7103cSJiong Wang } 30516bc7103cSJiong Wang 30526bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 30536bc7103cSJiong Wang * could serve as the new head of the the next chain. 30546bc7103cSJiong Wang */ 30556bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 30566bc7103cSJiong Wang head_ld_meta = meta1; 30576bc7103cSJiong Wang head_st_meta = meta2; 30586bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 30596bc7103cSJiong Wang BPF_LDST_BYTES(ld); 30606bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 30616bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 30626bc7103cSJiong Wang prev_ld = ld; 30636bc7103cSJiong Wang prev_st = st; 30646bc7103cSJiong Wang count = 1; 30656bc7103cSJiong Wang } else { 30666bc7103cSJiong Wang head_ld_meta = NULL; 30676bc7103cSJiong Wang head_st_meta = NULL; 30686bc7103cSJiong Wang prev_ld = NULL; 30696bc7103cSJiong Wang prev_st = NULL; 30706bc7103cSJiong Wang count = 0; 30716bc7103cSJiong Wang } 30726bc7103cSJiong Wang 30736bc7103cSJiong Wang continue; 30746bc7103cSJiong Wang } 30756bc7103cSJiong Wang 30766bc7103cSJiong Wang if (!head_ld_meta) { 30776bc7103cSJiong Wang head_ld_meta = meta1; 30786bc7103cSJiong Wang head_st_meta = meta2; 30796bc7103cSJiong Wang } else { 30806bc7103cSJiong Wang meta1->skip = true; 30816bc7103cSJiong Wang meta2->skip = true; 30826bc7103cSJiong Wang } 30836bc7103cSJiong Wang 30846bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 30856bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 30866bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 30876bc7103cSJiong Wang prev_ld = ld; 30886bc7103cSJiong Wang prev_st = st; 30896bc7103cSJiong Wang count++; 30906bc7103cSJiong Wang } 30916bc7103cSJiong Wang } 30926bc7103cSJiong Wang 309387b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 309487b10ecdSJiong Wang { 309587b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 309687b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 309787b10ecdSJiong Wang bool cache_avail = false; 309887b10ecdSJiong Wang struct bpf_insn *insn; 309987b10ecdSJiong Wang s32 range_ptr_off = 0; 310087b10ecdSJiong Wang u32 range_ptr_id = 0; 310187b10ecdSJiong Wang 310287b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 310387b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 310487b10ecdSJiong Wang cache_avail = false; 310587b10ecdSJiong Wang 310687b10ecdSJiong Wang if (meta->skip) 310787b10ecdSJiong Wang continue; 310887b10ecdSJiong Wang 310987b10ecdSJiong Wang insn = &meta->insn; 311087b10ecdSJiong Wang 311187b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 311287b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 311387b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 311487b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 311587b10ecdSJiong Wang cache_avail = false; 311687b10ecdSJiong Wang continue; 311787b10ecdSJiong Wang } 311887b10ecdSJiong Wang 311987b10ecdSJiong Wang if (!is_mbpf_load(meta)) 312087b10ecdSJiong Wang continue; 312187b10ecdSJiong Wang 312287b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 312387b10ecdSJiong Wang cache_avail = false; 312487b10ecdSJiong Wang continue; 312587b10ecdSJiong Wang } 312687b10ecdSJiong Wang 312787b10ecdSJiong Wang if (!cache_avail) { 312887b10ecdSJiong Wang cache_avail = true; 312987b10ecdSJiong Wang if (range_node) 313087b10ecdSJiong Wang goto end_current_then_start_new; 313187b10ecdSJiong Wang goto start_new; 313287b10ecdSJiong Wang } 313387b10ecdSJiong Wang 313487b10ecdSJiong Wang /* Check ID to make sure two reads share the same 313587b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 313687b10ecdSJiong Wang * to make sure they also share the same constant 313787b10ecdSJiong Wang * offset. 313887b10ecdSJiong Wang * 313987b10ecdSJiong Wang * OFFs don't really need to be the same, because they 314087b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 314187b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 314287b10ecdSJiong Wang * offsets against original packet pointer. We don't 314387b10ecdSJiong Wang * support this. 314487b10ecdSJiong Wang */ 314587b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 314687b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 314787b10ecdSJiong Wang s16 new_start = range_start; 314887b10ecdSJiong Wang s16 end, off = insn->off; 314987b10ecdSJiong Wang s16 new_end = range_end; 315087b10ecdSJiong Wang bool changed = false; 315187b10ecdSJiong Wang 315287b10ecdSJiong Wang if (off < range_start) { 315387b10ecdSJiong Wang new_start = off; 315487b10ecdSJiong Wang changed = true; 315587b10ecdSJiong Wang } 315687b10ecdSJiong Wang 315787b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 315887b10ecdSJiong Wang if (end > range_end) { 315987b10ecdSJiong Wang new_end = end; 316087b10ecdSJiong Wang changed = true; 316187b10ecdSJiong Wang } 316287b10ecdSJiong Wang 316387b10ecdSJiong Wang if (!changed) 316487b10ecdSJiong Wang continue; 316587b10ecdSJiong Wang 316687b10ecdSJiong Wang if (new_end - new_start <= 64) { 316787b10ecdSJiong Wang /* Install new range. */ 316887b10ecdSJiong Wang range_start = new_start; 316987b10ecdSJiong Wang range_end = new_end; 317087b10ecdSJiong Wang continue; 317187b10ecdSJiong Wang } 317287b10ecdSJiong Wang } 317387b10ecdSJiong Wang 317487b10ecdSJiong Wang end_current_then_start_new: 317587b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 317687b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 317787b10ecdSJiong Wang start_new: 317887b10ecdSJiong Wang range_node = meta; 317987b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 318087b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 318187b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 318287b10ecdSJiong Wang range_start = insn->off; 318387b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 318487b10ecdSJiong Wang } 318587b10ecdSJiong Wang 318687b10ecdSJiong Wang if (range_node) { 318787b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 318887b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 318987b10ecdSJiong Wang } 319087b10ecdSJiong Wang 319187b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 319287b10ecdSJiong Wang if (meta->skip) 319387b10ecdSJiong Wang continue; 319487b10ecdSJiong Wang 319587b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 319687b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 319787b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 319887b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 319987b10ecdSJiong Wang } else { 320087b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 320187b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 320287b10ecdSJiong Wang } 320387b10ecdSJiong Wang } 320487b10ecdSJiong Wang } 320587b10ecdSJiong Wang } 320687b10ecdSJiong Wang 3207d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 3208d9ae7f2bSJakub Kicinski { 3209d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 3210d9ae7f2bSJakub Kicinski 3211d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 3212d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 32136bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 321487b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 3215d9ae7f2bSJakub Kicinski 3216d9ae7f2bSJakub Kicinski return 0; 3217d9ae7f2bSJakub Kicinski } 3218d9ae7f2bSJakub Kicinski 32192314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 3220fd068ddcSJakub Kicinski { 32212314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 3222fd068ddcSJakub Kicinski int i; 3223fd068ddcSJakub Kicinski 32242314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 3225fd068ddcSJakub Kicinski int err; 3226fd068ddcSJakub Kicinski 32272314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 3228fd068ddcSJakub Kicinski if (err) 3229fd068ddcSJakub Kicinski return err; 3230fd068ddcSJakub Kicinski 32312314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 3232fd068ddcSJakub Kicinski } 3233fd068ddcSJakub Kicinski 3234fd068ddcSJakub Kicinski return 0; 3235fd068ddcSJakub Kicinski } 3236fd068ddcSJakub Kicinski 323744a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 323844a12eccSJakub Kicinski { 323944a12eccSJakub Kicinski void *prog; 324044a12eccSJakub Kicinski 324144a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 324244a12eccSJakub Kicinski if (!prog) 324344a12eccSJakub Kicinski return; 324444a12eccSJakub Kicinski 324544a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 324644a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 324744a12eccSJakub Kicinski kvfree(nfp_prog->prog); 324844a12eccSJakub Kicinski nfp_prog->prog = prog; 324944a12eccSJakub Kicinski } 325044a12eccSJakub Kicinski 3251c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3252d9ae7f2bSJakub Kicinski { 3253d9ae7f2bSJakub Kicinski int ret; 3254d9ae7f2bSJakub Kicinski 3255d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 3256d9ae7f2bSJakub Kicinski if (ret) 32579314c442SJakub Kicinski return ret; 3258d9ae7f2bSJakub Kicinski 3259d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 3260d9ae7f2bSJakub Kicinski if (ret) { 3261d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 3262d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 32639314c442SJakub Kicinski return -EINVAL; 3264d9ae7f2bSJakub Kicinski } 3265d9ae7f2bSJakub Kicinski 326644a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 326744a12eccSJakub Kicinski 32682314fe9eSJakub Kicinski return ret; 3269d9ae7f2bSJakub Kicinski } 32701549921dSJakub Kicinski 32711549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 32721549921dSJakub Kicinski { 32731549921dSJakub Kicinski struct nfp_insn_meta *meta; 32741549921dSJakub Kicinski 32751549921dSJakub Kicinski /* Another pass to record jump information. */ 32761549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 32771549921dSJakub Kicinski u64 code = meta->insn.code; 32781549921dSJakub Kicinski 32791549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 32801549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 32811549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 32821549921dSJakub Kicinski unsigned short dst_indx; 32831549921dSJakub Kicinski 32841549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 32851549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 32861549921dSJakub Kicinski cnt); 32871549921dSJakub Kicinski 32881549921dSJakub Kicinski meta->jmp_dst = dst_meta; 32891549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 32901549921dSJakub Kicinski } 32911549921dSJakub Kicinski } 32921549921dSJakub Kicinski } 32932314fe9eSJakub Kicinski 329474801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 329574801e50SQuentin Monnet { 329674801e50SQuentin Monnet return !!instr_cb[code]; 329774801e50SQuentin Monnet } 329874801e50SQuentin Monnet 32992314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 33002314fe9eSJakub Kicinski { 33012314fe9eSJakub Kicinski unsigned int i; 33022314fe9eSJakub Kicinski u64 *prog; 33032314fe9eSJakub Kicinski int err; 33042314fe9eSJakub Kicinski 33052314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 33062314fe9eSJakub Kicinski GFP_KERNEL); 33072314fe9eSJakub Kicinski if (!prog) 33082314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 33092314fe9eSJakub Kicinski 33102314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 33112314fe9eSJakub Kicinski enum nfp_relo_type special; 331277a3d311SJakub Kicinski u32 val; 33132314fe9eSJakub Kicinski 33142314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 33152314fe9eSJakub Kicinski switch (special) { 33162314fe9eSJakub Kicinski case RELO_NONE: 33172314fe9eSJakub Kicinski continue; 33182314fe9eSJakub Kicinski case RELO_BR_REL: 33192314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 33202314fe9eSJakub Kicinski break; 33212314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 33222314fe9eSJakub Kicinski br_set_offset(&prog[i], 33232314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 33242314fe9eSJakub Kicinski break; 33252314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 33262314fe9eSJakub Kicinski br_set_offset(&prog[i], 33272314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 33282314fe9eSJakub Kicinski break; 33292314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 33302314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 33312314fe9eSJakub Kicinski break; 333277a3d311SJakub Kicinski case RELO_BR_HELPER: 333377a3d311SJakub Kicinski val = br_get_offset(prog[i]); 333477a3d311SJakub Kicinski val -= BR_OFF_RELO; 333577a3d311SJakub Kicinski switch (val) { 333677a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 333777a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 333877a3d311SJakub Kicinski break; 333944d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 334044d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 334144d65a47SJakub Kicinski break; 3342bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3343bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 3344bfee64deSJakub Kicinski break; 334577a3d311SJakub Kicinski default: 334677a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 334777a3d311SJakub Kicinski val); 334877a3d311SJakub Kicinski err = -EINVAL; 334977a3d311SJakub Kicinski goto err_free_prog; 335077a3d311SJakub Kicinski } 335177a3d311SJakub Kicinski br_set_offset(&prog[i], val); 335277a3d311SJakub Kicinski break; 335377a3d311SJakub Kicinski case RELO_IMMED_REL: 335477a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 335577a3d311SJakub Kicinski break; 33562314fe9eSJakub Kicinski } 33572314fe9eSJakub Kicinski 33582314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 33592314fe9eSJakub Kicinski } 33602314fe9eSJakub Kicinski 33612314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 33622314fe9eSJakub Kicinski if (err) 33632314fe9eSJakub Kicinski goto err_free_prog; 33642314fe9eSJakub Kicinski 33652314fe9eSJakub Kicinski return prog; 33662314fe9eSJakub Kicinski 33672314fe9eSJakub Kicinski err_free_prog: 33682314fe9eSJakub Kicinski kfree(prog); 33692314fe9eSJakub Kicinski return ERR_PTR(err); 33702314fe9eSJakub Kicinski } 3371