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) | 4082df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr) | 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 4362df03a50SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr / 4, 4372df03a50SJakub Kicinski false, reg.src_lmextn); 4382df03a50SJakub Kicinski } 4392df03a50SJakub Kicinski 4401c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 4411c03e03fSJakub Kicinski { 4421c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 4431c03e03fSJakub Kicinski } 4441c03e03fSJakub Kicinski 445d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 446d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 447d9ae7f2bSJakub Kicinski { 448d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 449d9ae7f2bSJakub Kicinski *val = imm; 450d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 451d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 452d9ae7f2bSJakub Kicinski *val = imm >> 8; 453d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 454d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 455d9ae7f2bSJakub Kicinski *val = imm >> 16; 456d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 457d9ae7f2bSJakub Kicinski } else { 458d9ae7f2bSJakub Kicinski return false; 459d9ae7f2bSJakub Kicinski } 460d9ae7f2bSJakub Kicinski 461d9ae7f2bSJakub Kicinski return true; 462d9ae7f2bSJakub Kicinski } 463d9ae7f2bSJakub Kicinski 464b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 465d9ae7f2bSJakub Kicinski { 466d9ae7f2bSJakub Kicinski enum immed_shift shift; 467d9ae7f2bSJakub Kicinski u16 val; 468d9ae7f2bSJakub Kicinski 469d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 470d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 471d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 472d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 473d9ae7f2bSJakub Kicinski } else { 474d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 475d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 476d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 477d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 478d9ae7f2bSJakub Kicinski } 479d9ae7f2bSJakub Kicinski } 480d9ae7f2bSJakub Kicinski 48177a3d311SJakub Kicinski static void 48277a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 48377a3d311SJakub Kicinski enum nfp_relo_type relo) 48477a3d311SJakub Kicinski { 48577a3d311SJakub Kicinski if (imm > 0xffff) { 48677a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 48777a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 48877a3d311SJakub Kicinski return; 48977a3d311SJakub Kicinski } 49077a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 49177a3d311SJakub Kicinski 49277a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 49377a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 49477a3d311SJakub Kicinski } 49577a3d311SJakub Kicinski 496d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 497d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 498d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 499d9ae7f2bSJakub Kicinski */ 500b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 501d9ae7f2bSJakub Kicinski { 502d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 503d9ae7f2bSJakub Kicinski return reg_imm(imm); 504d9ae7f2bSJakub Kicinski 505d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 506d9ae7f2bSJakub Kicinski return tmp_reg; 507d9ae7f2bSJakub Kicinski } 508d9ae7f2bSJakub Kicinski 509d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 510d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 511d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 512d9ae7f2bSJakub Kicinski */ 513b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 514d9ae7f2bSJakub Kicinski { 515d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 516d9ae7f2bSJakub Kicinski return reg_imm(imm); 517d9ae7f2bSJakub Kicinski 518d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 519d9ae7f2bSJakub Kicinski return tmp_reg; 520d9ae7f2bSJakub Kicinski } 521d9ae7f2bSJakub Kicinski 522ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 523ff42bb9fSJakub Kicinski { 524ff42bb9fSJakub Kicinski while (count--) 525ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 526ff42bb9fSJakub Kicinski } 527ff42bb9fSJakub Kicinski 528c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 529c000dfb5SJakub Kicinski { 530c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 531c000dfb5SJakub Kicinski } 532c000dfb5SJakub Kicinski 533d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 534d9ae7f2bSJakub Kicinski { 535c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 536d9ae7f2bSJakub Kicinski } 537d9ae7f2bSJakub Kicinski 5389879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 5399879a381SJiong Wang * result to @dst from low end. 5409879a381SJiong Wang */ 5419879a381SJiong Wang static void 5429879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 5439879a381SJiong Wang u8 offset) 5449879a381SJiong Wang { 5459879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 5469879a381SJiong Wang u8 mask = (1 << field_len) - 1; 5479879a381SJiong Wang 5489879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 5499879a381SJiong Wang } 5509879a381SJiong Wang 55191ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 55291ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 55391ff69e8SJiong Wang */ 55491ff69e8SJiong Wang static void 55591ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 55691ff69e8SJiong Wang u8 field_len, u8 offset) 55791ff69e8SJiong Wang { 55891ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 55991ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 56091ff69e8SJiong Wang 56191ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 56291ff69e8SJiong Wang } 56391ff69e8SJiong Wang 5643dd43c33SJakub Kicinski static void 5653dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 5663dd43c33SJakub Kicinski swreg *rega, swreg *regb) 5673dd43c33SJakub Kicinski { 5683dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 5693dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 5703dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 5713dd43c33SJakub Kicinski return; 5723dd43c33SJakub Kicinski } 5733dd43c33SJakub Kicinski 5743dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 5753dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 5763dd43c33SJakub Kicinski reg_imm(0)); 5773dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 5783dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 5793dd43c33SJakub Kicinski } 5803dd43c33SJakub Kicinski 5819879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 5829879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 5839879a381SJiong Wang { 5849879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 5859879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 5869879a381SJiong Wang swreg src_base, off; 5873dd43c33SJakub Kicinski bool src_40bit_addr; 5889879a381SJiong Wang unsigned int i; 5899879a381SJiong Wang u8 xfer_num; 5909879a381SJiong Wang 5919879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 5923dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 5939879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 5949879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 5959879a381SJiong Wang 5963dd43c33SJakub Kicinski if (src_40bit_addr) 5973dd43c33SJakub Kicinski addr40_offset(nfp_prog, meta->insn.src_reg, off, &src_base, 5983dd43c33SJakub Kicinski &off); 5993dd43c33SJakub Kicinski 6008c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 6018c900538SJiong Wang if (len > 32) 6028c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6038c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6048c900538SJiong Wang 6059879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 6063dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 6073dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 608b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 6099879a381SJiong Wang 6109879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 6119879a381SJiong Wang for (i = 0; i < xfer_num; i++) 6129879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 6139879a381SJiong Wang 6149879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 6159879a381SJiong Wang 6169879a381SJiong Wang if (len <= 8) { 6179879a381SJiong Wang /* Use single direct_ref write8. */ 6189879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6199879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 620b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6218c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 6229879a381SJiong Wang /* Use single direct_ref write32. */ 6239879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6249879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 625b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6268c900538SJiong Wang } else if (len <= 32) { 6279879a381SJiong Wang /* Use single indirect_ref write8. */ 6289879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 6299879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 6309879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6319879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 632b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 6338c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 6348c900538SJiong Wang /* Use single indirect_ref write32. */ 6358c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6368c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6378c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6388c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 639b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 6408c900538SJiong Wang } else if (len <= 40) { 6418c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 6428c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 6438c900538SJiong Wang */ 6448c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6458c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 646b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6478c900538SJiong Wang 6488c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 6498c900538SJiong Wang imm_b(nfp_prog)); 6508c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 6518c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 652b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6538c900538SJiong Wang } else { 6548c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 6558c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 6568c900538SJiong Wang */ 6578c900538SJiong Wang u8 new_off; 6588c900538SJiong Wang 6598c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6608c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 6618c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6628c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 663b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 6648c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 6658c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 6668c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 6678c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 668b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 6699879a381SJiong Wang } 6709879a381SJiong Wang 6719879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 6729879a381SJiong Wang * before and after we do memory copy optimization. 6739879a381SJiong Wang * 6749879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 6759879a381SJiong Wang * need to make sure it is loaded with the value the same as before 6769879a381SJiong Wang * this transformation. 6779879a381SJiong Wang * 6789879a381SJiong Wang * These extra loads could be removed once we have accurate register 6799879a381SJiong Wang * usage information. 6809879a381SJiong Wang */ 6819879a381SJiong Wang if (descending_seq) 6829879a381SJiong Wang xfer_num = 0; 6839879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 6849879a381SJiong Wang xfer_num = xfer_num - 1; 6859879a381SJiong Wang else 6869879a381SJiong Wang xfer_num = xfer_num - 2; 6879879a381SJiong Wang 6889879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 6899879a381SJiong Wang case BPF_B: 6909879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6919879a381SJiong Wang reg_xfer(xfer_num), 1, 6929879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 6939879a381SJiong Wang break; 6949879a381SJiong Wang case BPF_H: 6959879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6969879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 6979879a381SJiong Wang break; 6989879a381SJiong Wang case BPF_W: 6999879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7009879a381SJiong Wang reg_xfer(0)); 7019879a381SJiong Wang break; 7029879a381SJiong Wang case BPF_DW: 7039879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7049879a381SJiong Wang reg_xfer(xfer_num)); 7059879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 7069879a381SJiong Wang reg_xfer(xfer_num + 1)); 7079879a381SJiong Wang break; 7089879a381SJiong Wang } 7099879a381SJiong Wang 7109879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 7119879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 7129879a381SJiong Wang 7139879a381SJiong Wang return 0; 7149879a381SJiong Wang } 7159879a381SJiong Wang 716d9ae7f2bSJakub Kicinski static int 7170a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 718d9ae7f2bSJakub Kicinski { 719d9ae7f2bSJakub Kicinski unsigned int i; 720d9ae7f2bSJakub Kicinski u16 shift, sz; 721d9ae7f2bSJakub Kicinski 722d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 723d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 724d9ae7f2bSJakub Kicinski */ 7250a793977SJakub Kicinski sz = max(size, 4); 726d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 727d9ae7f2bSJakub Kicinski 7280a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 729b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 7300a793977SJakub Kicinski 7310a793977SJakub Kicinski i = 0; 7320a793977SJakub Kicinski if (shift) 7330a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 7340a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 7350a793977SJakub Kicinski else 7360a793977SJakub Kicinski for (; i * 4 < size; i++) 7370a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7380a793977SJakub Kicinski 7390a793977SJakub Kicinski if (i < 2) 7400a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7410a793977SJakub Kicinski 7420a793977SJakub Kicinski return 0; 7430a793977SJakub Kicinski } 7440a793977SJakub Kicinski 7450a793977SJakub Kicinski static int 7463dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 7473dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 7482ca71441SJakub Kicinski { 7492ca71441SJakub Kicinski unsigned int i; 7502ca71441SJakub Kicinski u8 mask, sz; 7512ca71441SJakub Kicinski 7523dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 7532ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 7542ca71441SJakub Kicinski */ 7552ca71441SJakub Kicinski sz = max(size, 4); 7562ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 7572ca71441SJakub Kicinski 7583dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 759b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 7602ca71441SJakub Kicinski 7612ca71441SJakub Kicinski i = 0; 7622ca71441SJakub Kicinski if (mask) 7632ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 7642ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 7652ca71441SJakub Kicinski else 7662ca71441SJakub Kicinski for (; i * 4 < size; i++) 7672ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7682ca71441SJakub Kicinski 7692ca71441SJakub Kicinski if (i < 2) 7702ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7712ca71441SJakub Kicinski 7722ca71441SJakub Kicinski return 0; 7732ca71441SJakub Kicinski } 7742ca71441SJakub Kicinski 7752ca71441SJakub Kicinski static int 7763dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7773dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7783dd43c33SJakub Kicinski { 7793dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 7803dd43c33SJakub Kicinski size, CMD_MODE_32b); 7813dd43c33SJakub Kicinski } 7823dd43c33SJakub Kicinski 7833dd43c33SJakub Kicinski static int 7843dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7853dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7863dd43c33SJakub Kicinski { 7873dd43c33SJakub Kicinski swreg rega, regb; 7883dd43c33SJakub Kicinski 7893dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 7903dd43c33SJakub Kicinski 7913dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 7923dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 7933dd43c33SJakub Kicinski } 7943dd43c33SJakub Kicinski 7953dd43c33SJakub Kicinski static int 7960a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 7970a793977SJakub Kicinski { 7980a793977SJakub Kicinski swreg tmp_reg; 7990a793977SJakub Kicinski 800d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 801d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8020a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 8030a793977SJakub Kicinski 804d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 805d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 806d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 807d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 80818e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 809e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8100a793977SJakub Kicinski 811d9ae7f2bSJakub Kicinski /* Load data */ 8120a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 813d9ae7f2bSJakub Kicinski } 814d9ae7f2bSJakub Kicinski 815d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 816d9ae7f2bSJakub Kicinski { 8170a793977SJakub Kicinski swreg tmp_reg; 8180a793977SJakub Kicinski 8190a793977SJakub Kicinski /* Check packet length */ 8200a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 8210a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 822e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8230a793977SJakub Kicinski 8240a793977SJakub Kicinski /* Load data */ 8250a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8260a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 827d9ae7f2bSJakub Kicinski } 828d9ae7f2bSJakub Kicinski 829e663fe38SJakub Kicinski static int 830e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 831e663fe38SJakub Kicinski u8 src_gpr, u8 size) 832e663fe38SJakub Kicinski { 833e663fe38SJakub Kicinski unsigned int i; 834e663fe38SJakub Kicinski 835e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 836e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 837e663fe38SJakub Kicinski 838e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 839b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 840e663fe38SJakub Kicinski 841e663fe38SJakub Kicinski return 0; 842e663fe38SJakub Kicinski } 843e663fe38SJakub Kicinski 844e663fe38SJakub Kicinski static int 845e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 846e663fe38SJakub Kicinski u64 imm, u8 size) 847e663fe38SJakub Kicinski { 848e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 849e663fe38SJakub Kicinski if (size == 8) 850e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 851e663fe38SJakub Kicinski 852e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 853b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 854e663fe38SJakub Kicinski 855e663fe38SJakub Kicinski return 0; 856e663fe38SJakub Kicinski } 857e663fe38SJakub Kicinski 858ee9133a8SJakub Kicinski typedef int 859ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 8602df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8612df03a50SJakub Kicinski bool needs_inc); 862a82b23fbSJakub Kicinski 863a82b23fbSJakub Kicinski static int 864a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 8652df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8662df03a50SJakub Kicinski bool needs_inc) 867a82b23fbSJakub Kicinski { 8682df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 869a82b23fbSJakub Kicinski u32 idx, src_byte; 870a82b23fbSJakub Kicinski enum shf_sc sc; 871a82b23fbSJakub Kicinski swreg reg; 872a82b23fbSJakub Kicinski int shf; 873a82b23fbSJakub Kicinski u8 mask; 874a82b23fbSJakub Kicinski 875a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 876a82b23fbSJakub Kicinski return -EOPNOTSUPP; 877a82b23fbSJakub Kicinski 878a82b23fbSJakub Kicinski idx = off / 4; 879a82b23fbSJakub Kicinski 880a82b23fbSJakub Kicinski /* Move the entire word */ 881a82b23fbSJakub Kicinski if (size == 4) { 8822df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 8832df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 884a82b23fbSJakub Kicinski return 0; 885a82b23fbSJakub Kicinski } 886a82b23fbSJakub Kicinski 8872df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8882df03a50SJakub Kicinski return -EOPNOTSUPP; 8892df03a50SJakub Kicinski 890a82b23fbSJakub Kicinski src_byte = off % 4; 891a82b23fbSJakub Kicinski 892a82b23fbSJakub Kicinski mask = (1 << size) - 1; 893a82b23fbSJakub Kicinski mask <<= dst_byte; 894a82b23fbSJakub Kicinski 895a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 896a82b23fbSJakub Kicinski return -EOPNOTSUPP; 897a82b23fbSJakub Kicinski 898a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 899a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 900a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 901a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 902a82b23fbSJakub Kicinski shf = 32 - shf; 903a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 904a82b23fbSJakub Kicinski } else { 905a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 906a82b23fbSJakub Kicinski } 907a82b23fbSJakub Kicinski 908a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 909a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 910a82b23fbSJakub Kicinski */ 911a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9122df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 913a82b23fbSJakub Kicinski } else { 914a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 9159a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 9169a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 9179a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 9189a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 9199a90c83cSJakub Kicinski */ 9209a90c83cSJakub Kicinski if (first || !new_gpr) 921a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 922a82b23fbSJakub Kicinski } 923a82b23fbSJakub Kicinski 924a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 925a82b23fbSJakub Kicinski 9262df03a50SJakub Kicinski if (should_inc) 9272df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9282df03a50SJakub Kicinski 929a82b23fbSJakub Kicinski return 0; 930a82b23fbSJakub Kicinski } 931ee9133a8SJakub Kicinski 932ee9133a8SJakub Kicinski static int 933ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 9342df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9352df03a50SJakub Kicinski bool needs_inc) 936ee9133a8SJakub Kicinski { 9372df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 938ee9133a8SJakub Kicinski u32 idx, dst_byte; 939ee9133a8SJakub Kicinski enum shf_sc sc; 940ee9133a8SJakub Kicinski swreg reg; 941ee9133a8SJakub Kicinski int shf; 942ee9133a8SJakub Kicinski u8 mask; 943ee9133a8SJakub Kicinski 944ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 945ee9133a8SJakub Kicinski return -EOPNOTSUPP; 946ee9133a8SJakub Kicinski 947ee9133a8SJakub Kicinski idx = off / 4; 948ee9133a8SJakub Kicinski 949ee9133a8SJakub Kicinski /* Move the entire word */ 950ee9133a8SJakub Kicinski if (size == 4) { 9512df03a50SJakub Kicinski wrp_mov(nfp_prog, 9522df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 9532df03a50SJakub Kicinski reg_b(src)); 954ee9133a8SJakub Kicinski return 0; 955ee9133a8SJakub Kicinski } 956ee9133a8SJakub Kicinski 9572df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9582df03a50SJakub Kicinski return -EOPNOTSUPP; 9592df03a50SJakub Kicinski 960ee9133a8SJakub Kicinski dst_byte = off % 4; 961ee9133a8SJakub Kicinski 962ee9133a8SJakub Kicinski mask = (1 << size) - 1; 963ee9133a8SJakub Kicinski mask <<= dst_byte; 964ee9133a8SJakub Kicinski 965ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 966ee9133a8SJakub Kicinski return -EOPNOTSUPP; 967ee9133a8SJakub Kicinski 968ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 969ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 970ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 971ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 972ee9133a8SJakub Kicinski shf = 32 - shf; 973ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 974ee9133a8SJakub Kicinski } else { 975ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 976ee9133a8SJakub Kicinski } 977ee9133a8SJakub Kicinski 978ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 979ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 980ee9133a8SJakub Kicinski */ 981ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9822df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 983ee9133a8SJakub Kicinski } else { 984ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 9859a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 9869a90c83cSJakub Kicinski * the middle location will be overwritten fully. 9879a90c83cSJakub Kicinski */ 9889a90c83cSJakub Kicinski if (first || last) 989ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 990ee9133a8SJakub Kicinski } 991ee9133a8SJakub Kicinski 992ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 993ee9133a8SJakub Kicinski 9949a90c83cSJakub Kicinski if (new_gpr || last) { 995ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 996ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 9972df03a50SJakub Kicinski if (should_inc) 9982df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9999a90c83cSJakub Kicinski } 1000ee9133a8SJakub Kicinski 1001ee9133a8SJakub Kicinski return 0; 1002ee9133a8SJakub Kicinski } 1003ee9133a8SJakub Kicinski 1004ee9133a8SJakub Kicinski static int 1005ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1006b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1007b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1008ee9133a8SJakub Kicinski { 1009d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 10109a90c83cSJakub Kicinski bool first = true, last; 10112df03a50SJakub Kicinski bool needs_inc = false; 10122df03a50SJakub Kicinski swreg stack_off_reg; 1013a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1014ee9133a8SJakub Kicinski u32 gpr_byte = 0; 10152df03a50SJakub Kicinski bool lm3 = true; 1016ee9133a8SJakub Kicinski int ret; 1017ee9133a8SJakub Kicinski 1018b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1019b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1020b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1021b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1022b14157eeSJakub Kicinski */ 1023b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1024b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1025b14157eeSJakub Kicinski 1026b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1027b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1028b14157eeSJakub Kicinski 1029b14157eeSJakub Kicinski needs_inc = true; 1030b14157eeSJakub Kicinski } else if (off + size <= 64) { 10312df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 10322df03a50SJakub Kicinski lm3 = false; 10332df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 10342df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 10352df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 10362df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 10372df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 10382df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 10392df03a50SJakub Kicinski */ 10402df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 10412df03a50SJakub Kicinski stack_imm(nfp_prog)); 10422df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10432df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10442df03a50SJakub Kicinski 10452df03a50SJakub Kicinski off %= 32; 10462df03a50SJakub Kicinski } else { 10472df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 10482df03a50SJakub Kicinski stack_imm(nfp_prog)); 10492df03a50SJakub Kicinski 10502df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10512df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10522df03a50SJakub Kicinski 10532df03a50SJakub Kicinski needs_inc = true; 10542df03a50SJakub Kicinski } 10552df03a50SJakub Kicinski if (lm3) { 10562df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 10572df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 10582df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 10592df03a50SJakub Kicinski } 10602df03a50SJakub Kicinski 1061a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1062a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1063a82b23fbSJakub Kicinski 1064ee9133a8SJakub Kicinski while (size) { 1065ee9133a8SJakub Kicinski u32 slice_end; 1066ee9133a8SJakub Kicinski u8 slice_size; 1067ee9133a8SJakub Kicinski 1068ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1069ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1070ee9133a8SJakub Kicinski slice_size = slice_end - off; 1071ee9133a8SJakub Kicinski 10729a90c83cSJakub Kicinski last = slice_size == size; 10739a90c83cSJakub Kicinski 10742df03a50SJakub Kicinski if (needs_inc) 10752df03a50SJakub Kicinski off %= 4; 10762df03a50SJakub Kicinski 1077a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 10782df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1079ee9133a8SJakub Kicinski if (ret) 1080ee9133a8SJakub Kicinski return ret; 1081ee9133a8SJakub Kicinski 1082a82b23fbSJakub Kicinski prev_gpr = gpr; 10839a90c83cSJakub Kicinski first = false; 10849a90c83cSJakub Kicinski 1085ee9133a8SJakub Kicinski gpr_byte += slice_size; 1086ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1087ee9133a8SJakub Kicinski gpr_byte -= 4; 1088ee9133a8SJakub Kicinski gpr++; 1089ee9133a8SJakub Kicinski } 1090ee9133a8SJakub Kicinski 1091ee9133a8SJakub Kicinski size -= slice_size; 1092ee9133a8SJakub Kicinski off += slice_size; 1093ee9133a8SJakub Kicinski } 1094ee9133a8SJakub Kicinski 1095ee9133a8SJakub Kicinski return 0; 1096ee9133a8SJakub Kicinski } 1097ee9133a8SJakub Kicinski 1098d9ae7f2bSJakub Kicinski static void 1099d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1100d9ae7f2bSJakub Kicinski { 1101b3f868dfSJakub Kicinski swreg tmp_reg; 1102d9ae7f2bSJakub Kicinski 1103d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1104d9ae7f2bSJakub Kicinski if (!imm) 1105d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1106d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1107d9ae7f2bSJakub Kicinski return; 1108d9ae7f2bSJakub Kicinski } 1109d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1110d9ae7f2bSJakub Kicinski if (!~imm) 1111d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1112d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1113d9ae7f2bSJakub Kicinski return; 1114d9ae7f2bSJakub Kicinski } 1115d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1116d9ae7f2bSJakub Kicinski if (!~imm) 1117d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 11185d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1119d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1120d9ae7f2bSJakub Kicinski return; 1121d9ae7f2bSJakub Kicinski } 1122d9ae7f2bSJakub Kicinski 1123d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1124d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1125d9ae7f2bSJakub Kicinski } 1126d9ae7f2bSJakub Kicinski 1127d9ae7f2bSJakub Kicinski static int 1128d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1129d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1130d9ae7f2bSJakub Kicinski { 1131d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1132d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1133d9ae7f2bSJakub Kicinski 1134d9ae7f2bSJakub Kicinski if (skip) { 1135d9ae7f2bSJakub Kicinski meta->skip = true; 1136d9ae7f2bSJakub Kicinski return 0; 1137d9ae7f2bSJakub Kicinski } 1138d9ae7f2bSJakub Kicinski 1139d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1140d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1141d9ae7f2bSJakub Kicinski 1142d9ae7f2bSJakub Kicinski return 0; 1143d9ae7f2bSJakub Kicinski } 1144d9ae7f2bSJakub Kicinski 1145d9ae7f2bSJakub Kicinski static int 1146d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1147d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1148d9ae7f2bSJakub Kicinski { 1149d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1150d9ae7f2bSJakub Kicinski 1151d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1152d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1153d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1154d9ae7f2bSJakub Kicinski 1155d9ae7f2bSJakub Kicinski return 0; 1156d9ae7f2bSJakub Kicinski } 1157d9ae7f2bSJakub Kicinski 1158d9ae7f2bSJakub Kicinski static int 1159d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1160d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1161d9ae7f2bSJakub Kicinski { 1162d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1163d9ae7f2bSJakub Kicinski 1164d9ae7f2bSJakub Kicinski if (skip) { 1165d9ae7f2bSJakub Kicinski meta->skip = true; 1166d9ae7f2bSJakub Kicinski return 0; 1167d9ae7f2bSJakub Kicinski } 1168d9ae7f2bSJakub Kicinski 1169d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1170d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1171d9ae7f2bSJakub Kicinski 1172d9ae7f2bSJakub Kicinski return 0; 1173d9ae7f2bSJakub Kicinski } 1174d9ae7f2bSJakub Kicinski 1175d9ae7f2bSJakub Kicinski static int 1176d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1177d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1178d9ae7f2bSJakub Kicinski { 1179d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1180d9ae7f2bSJakub Kicinski 1181d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1182d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1183d9ae7f2bSJakub Kicinski 1184d9ae7f2bSJakub Kicinski return 0; 1185d9ae7f2bSJakub Kicinski } 1186d9ae7f2bSJakub Kicinski 1187d9ae7f2bSJakub Kicinski static void 1188d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1189d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1190d9ae7f2bSJakub Kicinski { 1191d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1192d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1193d9ae7f2bSJakub Kicinski } 1194d9ae7f2bSJakub Kicinski 1195d9ae7f2bSJakub Kicinski static int 1196d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1197d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1198d9ae7f2bSJakub Kicinski { 1199d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1200d9ae7f2bSJakub Kicinski 1201d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1202d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1203d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1204d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1205d9ae7f2bSJakub Kicinski 1206d9ae7f2bSJakub Kicinski return 0; 1207d9ae7f2bSJakub Kicinski } 1208d9ae7f2bSJakub Kicinski 1209d9ae7f2bSJakub Kicinski static int 1210d9ae7f2bSJakub Kicinski wrp_cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1211d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1212d9ae7f2bSJakub Kicinski { 1213d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1214d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1215d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1216b3f868dfSJakub Kicinski swreg tmp_reg; 1217d9ae7f2bSJakub Kicinski 1218d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1219d9ae7f2bSJakub Kicinski if (!swap) 1220d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), ALU_OP_SUB, tmp_reg); 1221d9ae7f2bSJakub Kicinski else 1222d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, ALU_OP_SUB, reg_a(reg)); 1223d9ae7f2bSJakub Kicinski 1224d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1225d9ae7f2bSJakub Kicinski if (!swap) 1226d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1227d9ae7f2bSJakub Kicinski reg_a(reg + 1), ALU_OP_SUB_C, tmp_reg); 1228d9ae7f2bSJakub Kicinski else 1229d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1230d9ae7f2bSJakub Kicinski tmp_reg, ALU_OP_SUB_C, reg_a(reg + 1)); 1231d9ae7f2bSJakub Kicinski 1232d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1233d9ae7f2bSJakub Kicinski 1234d9ae7f2bSJakub Kicinski return 0; 1235d9ae7f2bSJakub Kicinski } 1236d9ae7f2bSJakub Kicinski 1237d9ae7f2bSJakub Kicinski static int 1238d9ae7f2bSJakub Kicinski wrp_cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1239d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1240d9ae7f2bSJakub Kicinski { 1241d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 124226fa818dSJakub Kicinski u8 areg, breg; 124326fa818dSJakub Kicinski 124426fa818dSJakub Kicinski areg = insn->dst_reg * 2; 124526fa818dSJakub Kicinski breg = insn->src_reg * 2; 1246d9ae7f2bSJakub Kicinski 1247d9ae7f2bSJakub Kicinski if (swap) { 1248d9ae7f2bSJakub Kicinski areg ^= breg; 1249d9ae7f2bSJakub Kicinski breg ^= areg; 1250d9ae7f2bSJakub Kicinski areg ^= breg; 1251d9ae7f2bSJakub Kicinski } 1252d9ae7f2bSJakub Kicinski 1253d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1254d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1255d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 1256d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1257d9ae7f2bSJakub Kicinski 1258d9ae7f2bSJakub Kicinski return 0; 1259d9ae7f2bSJakub Kicinski } 1260d9ae7f2bSJakub Kicinski 12613119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 12623119d1fdSJakub Kicinski { 12633119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 12643119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 12653119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 12663119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 12673119d1fdSJakub Kicinski } 12683119d1fdSJakub Kicinski 12690d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12700d49eaf4SJakub Kicinski { 12710d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 12720d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 12730d49eaf4SJakub Kicinski u32 ret_einval, end; 12740d49eaf4SJakub Kicinski 12750d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 12760d49eaf4SJakub Kicinski 12778231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 12788231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 12798231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 12808231f844SJakub Kicinski return -EINVAL; 12818231f844SJakub Kicinski 12828231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 12838231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 12848231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12858231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12868231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12878231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12888231f844SJakub Kicinski 12898231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12908231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12918231f844SJakub Kicinski 12928231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 12938231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 12948231f844SJakub Kicinski */ 12958231f844SJakub Kicinski 12968231f844SJakub Kicinski return 0; 12978231f844SJakub Kicinski } 12988231f844SJakub Kicinski 12990d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 13000d49eaf4SJakub Kicinski end = ret_einval + 2; 13010d49eaf4SJakub Kicinski 13020d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 13030d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 13040d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 13050d49eaf4SJakub Kicinski 13060d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 13070d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13080d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 13090d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13100d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13110d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 13120d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13130d49eaf4SJakub Kicinski 13140d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 13150d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 13160d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13170d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13180d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 13190d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 13200d49eaf4SJakub Kicinski 13210d49eaf4SJakub Kicinski /* Load the ret code */ 13220d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 13230d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 13240d49eaf4SJakub Kicinski 13250d49eaf4SJakub Kicinski /* Modify the packet metadata */ 13260d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 13270d49eaf4SJakub Kicinski 13280d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 13292314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 13300d49eaf4SJakub Kicinski 13310d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13320d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13330d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 13340d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13350d49eaf4SJakub Kicinski 13360d49eaf4SJakub Kicinski /* return -EINVAL target */ 13370d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 13380d49eaf4SJakub Kicinski return -EINVAL; 13390d49eaf4SJakub Kicinski 13400d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 13410d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 13420d49eaf4SJakub Kicinski 13430d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 13440d49eaf4SJakub Kicinski return -EINVAL; 13450d49eaf4SJakub Kicinski 13460d49eaf4SJakub Kicinski return 0; 13470d49eaf4SJakub Kicinski } 13480d49eaf4SJakub Kicinski 134977a3d311SJakub Kicinski static int 1350fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 135177a3d311SJakub Kicinski { 135277a3d311SJakub Kicinski struct bpf_offloaded_map *offmap; 135377a3d311SJakub Kicinski struct nfp_bpf_map *nfp_map; 135477a3d311SJakub Kicinski bool load_lm_ptr; 135577a3d311SJakub Kicinski u32 ret_tgt; 135677a3d311SJakub Kicinski s64 lm_off; 135777a3d311SJakub Kicinski swreg tid; 135877a3d311SJakub Kicinski 135977a3d311SJakub Kicinski offmap = (struct bpf_offloaded_map *)meta->arg1.map_ptr; 136077a3d311SJakub Kicinski nfp_map = offmap->dev_priv; 136177a3d311SJakub Kicinski 136277a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 136377a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 13642f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 13652f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 136677a3d311SJakub Kicinski 136777a3d311SJakub Kicinski /* Set LM0 to start of key */ 136877a3d311SJakub Kicinski if (load_lm_ptr) 136977a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 137044d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 137144d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 137277a3d311SJakub Kicinski 137377a3d311SJakub Kicinski /* Load map ID into a register, it should actually fit as an immediate 137477a3d311SJakub Kicinski * but in case it doesn't deal with it here, not in the delay slots. 137577a3d311SJakub Kicinski */ 137677a3d311SJakub Kicinski tid = ur_load_imm_any(nfp_prog, nfp_map->tid, imm_a(nfp_prog)); 137777a3d311SJakub Kicinski 1378fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 137977a3d311SJakub Kicinski 2, RELO_BR_HELPER); 138077a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 138177a3d311SJakub Kicinski 138277a3d311SJakub Kicinski /* Load map ID into A0 */ 138377a3d311SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), tid); 138477a3d311SJakub Kicinski 138577a3d311SJakub Kicinski /* Load the return address into B0 */ 138677a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 138777a3d311SJakub Kicinski 138877a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 138977a3d311SJakub Kicinski return -EINVAL; 139077a3d311SJakub Kicinski 139177a3d311SJakub Kicinski /* Reset the LM0 pointer */ 139277a3d311SJakub Kicinski if (!load_lm_ptr) 139377a3d311SJakub Kicinski return 0; 139477a3d311SJakub Kicinski 139577a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 139677a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 139777a3d311SJakub Kicinski 139877a3d311SJakub Kicinski return 0; 139977a3d311SJakub Kicinski } 140077a3d311SJakub Kicinski 1401d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1402d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1403d9ae7f2bSJakub Kicinski { 1404d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1405b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1406b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1407d9ae7f2bSJakub Kicinski 1408b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1409b14157eeSJakub Kicinski swreg stack_depth_reg; 1410b14157eeSJakub Kicinski 1411b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1412b14157eeSJakub Kicinski nfp_prog->stack_depth, 1413b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1414b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1415b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1416b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1417b14157eeSJakub Kicinski } else { 1418b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1419b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1420b14157eeSJakub Kicinski } 1421d9ae7f2bSJakub Kicinski 1422d9ae7f2bSJakub Kicinski return 0; 1423d9ae7f2bSJakub Kicinski } 1424d9ae7f2bSJakub Kicinski 1425d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1426d9ae7f2bSJakub Kicinski { 1427d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1428d9ae7f2bSJakub Kicinski 1429d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1430d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1431d9ae7f2bSJakub Kicinski 1432d9ae7f2bSJakub Kicinski return 0; 1433d9ae7f2bSJakub Kicinski } 1434d9ae7f2bSJakub Kicinski 1435d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1436d9ae7f2bSJakub Kicinski { 1437d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1438d9ae7f2bSJakub Kicinski } 1439d9ae7f2bSJakub Kicinski 1440d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1441d9ae7f2bSJakub Kicinski { 1442d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1443d9ae7f2bSJakub Kicinski } 1444d9ae7f2bSJakub Kicinski 1445d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1446d9ae7f2bSJakub Kicinski { 1447d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1448d9ae7f2bSJakub Kicinski } 1449d9ae7f2bSJakub Kicinski 1450d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1451d9ae7f2bSJakub Kicinski { 1452d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1453d9ae7f2bSJakub Kicinski } 1454d9ae7f2bSJakub Kicinski 1455d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1456d9ae7f2bSJakub Kicinski { 1457d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1458d9ae7f2bSJakub Kicinski } 1459d9ae7f2bSJakub Kicinski 1460d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1461d9ae7f2bSJakub Kicinski { 1462d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1463d9ae7f2bSJakub Kicinski } 1464d9ae7f2bSJakub Kicinski 1465d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1466d9ae7f2bSJakub Kicinski { 1467d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1468d9ae7f2bSJakub Kicinski 1469d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1470d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1471d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1472d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1473d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1474d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1475d9ae7f2bSJakub Kicinski 1476d9ae7f2bSJakub Kicinski return 0; 1477d9ae7f2bSJakub Kicinski } 1478d9ae7f2bSJakub Kicinski 1479d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1480d9ae7f2bSJakub Kicinski { 1481d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1482d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1483d9ae7f2bSJakub Kicinski 1484d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1485d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1486d9ae7f2bSJakub Kicinski 1487d9ae7f2bSJakub Kicinski return 0; 1488d9ae7f2bSJakub Kicinski } 1489d9ae7f2bSJakub Kicinski 1490d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1491d9ae7f2bSJakub Kicinski { 1492d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1493d9ae7f2bSJakub Kicinski 1494d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1495d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1496d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1497d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1498d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1499d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1500d9ae7f2bSJakub Kicinski 1501d9ae7f2bSJakub Kicinski return 0; 1502d9ae7f2bSJakub Kicinski } 1503d9ae7f2bSJakub Kicinski 1504d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1505d9ae7f2bSJakub Kicinski { 1506d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1507d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1508d9ae7f2bSJakub Kicinski 1509d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1510d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1511d9ae7f2bSJakub Kicinski 1512d9ae7f2bSJakub Kicinski return 0; 1513d9ae7f2bSJakub Kicinski } 1514d9ae7f2bSJakub Kicinski 1515254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1516254ef4d7SJiong Wang { 1517254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1518254ef4d7SJiong Wang 1519254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1520254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1521254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1522254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1523254ef4d7SJiong Wang 1524254ef4d7SJiong Wang return 0; 1525254ef4d7SJiong Wang } 1526254ef4d7SJiong Wang 1527d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1528d9ae7f2bSJakub Kicinski { 1529d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15303cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1531d9ae7f2bSJakub Kicinski 15323cae1319SJakub Kicinski if (insn->imm < 32) { 15333cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15343cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15353cae1319SJakub Kicinski SHF_SC_R_DSHF, 32 - insn->imm); 15363cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15373cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15383cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm); 15393cae1319SJakub Kicinski } else if (insn->imm == 32) { 15403cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, dst); 15413cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15423cae1319SJakub Kicinski } else if (insn->imm > 32) { 15433cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15443cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15453cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm - 32); 15463cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15473cae1319SJakub Kicinski } 1548d9ae7f2bSJakub Kicinski 1549d9ae7f2bSJakub Kicinski return 0; 1550d9ae7f2bSJakub Kicinski } 1551d9ae7f2bSJakub Kicinski 1552d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1553d9ae7f2bSJakub Kicinski { 1554d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15553cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1556d9ae7f2bSJakub Kicinski 15573cae1319SJakub Kicinski if (insn->imm < 32) { 15583cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15593cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15603cae1319SJakub Kicinski SHF_SC_R_DSHF, insn->imm); 15613cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15623cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15633cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm); 15643cae1319SJakub Kicinski } else if (insn->imm == 32) { 15653cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst, dst + 1); 15663cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15673cae1319SJakub Kicinski } else if (insn->imm > 32) { 15683cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15693cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15703cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm - 32); 15713cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15723cae1319SJakub Kicinski } 1573d9ae7f2bSJakub Kicinski 1574d9ae7f2bSJakub Kicinski return 0; 1575d9ae7f2bSJakub Kicinski } 1576d9ae7f2bSJakub Kicinski 1577d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1578d9ae7f2bSJakub Kicinski { 1579d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1580d9ae7f2bSJakub Kicinski 1581d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1582d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1583d9ae7f2bSJakub Kicinski 1584d9ae7f2bSJakub Kicinski return 0; 1585d9ae7f2bSJakub Kicinski } 1586d9ae7f2bSJakub Kicinski 1587d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1588d9ae7f2bSJakub Kicinski { 1589d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1590d9ae7f2bSJakub Kicinski 1591d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1592d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1593d9ae7f2bSJakub Kicinski 1594d9ae7f2bSJakub Kicinski return 0; 1595d9ae7f2bSJakub Kicinski } 1596d9ae7f2bSJakub Kicinski 1597d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1598d9ae7f2bSJakub Kicinski { 1599d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1600d9ae7f2bSJakub Kicinski } 1601d9ae7f2bSJakub Kicinski 1602d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1603d9ae7f2bSJakub Kicinski { 1604d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1605d9ae7f2bSJakub Kicinski } 1606d9ae7f2bSJakub Kicinski 1607d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1608d9ae7f2bSJakub Kicinski { 1609d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1610d9ae7f2bSJakub Kicinski } 1611d9ae7f2bSJakub Kicinski 1612d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1613d9ae7f2bSJakub Kicinski { 1614d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1615d9ae7f2bSJakub Kicinski } 1616d9ae7f2bSJakub Kicinski 1617d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1618d9ae7f2bSJakub Kicinski { 1619d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1620d9ae7f2bSJakub Kicinski } 1621d9ae7f2bSJakub Kicinski 1622d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1623d9ae7f2bSJakub Kicinski { 1624d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1625d9ae7f2bSJakub Kicinski } 1626d9ae7f2bSJakub Kicinski 1627d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1628d9ae7f2bSJakub Kicinski { 1629d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1630d9ae7f2bSJakub Kicinski } 1631d9ae7f2bSJakub Kicinski 1632d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1633d9ae7f2bSJakub Kicinski { 1634d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1635d9ae7f2bSJakub Kicinski } 1636d9ae7f2bSJakub Kicinski 1637d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1638d9ae7f2bSJakub Kicinski { 1639d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1640d9ae7f2bSJakub Kicinski } 1641d9ae7f2bSJakub Kicinski 1642d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1643d9ae7f2bSJakub Kicinski { 1644d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1645d9ae7f2bSJakub Kicinski } 1646d9ae7f2bSJakub Kicinski 1647254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1648254ef4d7SJiong Wang { 1649254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1650254ef4d7SJiong Wang 1651254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1652254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1653254ef4d7SJiong Wang 1654254ef4d7SJiong Wang return 0; 1655254ef4d7SJiong Wang } 1656254ef4d7SJiong Wang 1657d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1658d9ae7f2bSJakub Kicinski { 1659d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1660d9ae7f2bSJakub Kicinski 1661d9ae7f2bSJakub Kicinski if (!insn->imm) 1662d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1663d9ae7f2bSJakub Kicinski 1664d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1665d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1666d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1667d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1668d9ae7f2bSJakub Kicinski 1669d9ae7f2bSJakub Kicinski return 0; 1670d9ae7f2bSJakub Kicinski } 1671d9ae7f2bSJakub Kicinski 16723119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16733119d1fdSJakub Kicinski { 16743119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 16753119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 16763119d1fdSJakub Kicinski 16773119d1fdSJakub Kicinski switch (insn->imm) { 16783119d1fdSJakub Kicinski case 16: 16793119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 16803119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 16813119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 16823119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 16833119d1fdSJakub Kicinski 16843119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16853119d1fdSJakub Kicinski break; 16863119d1fdSJakub Kicinski case 32: 16873119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 16883119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16893119d1fdSJakub Kicinski break; 16903119d1fdSJakub Kicinski case 64: 16913119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 16923119d1fdSJakub Kicinski 16933119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 16943119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 16953119d1fdSJakub Kicinski break; 16963119d1fdSJakub Kicinski } 16973119d1fdSJakub Kicinski 16983119d1fdSJakub Kicinski return 0; 16993119d1fdSJakub Kicinski } 17003119d1fdSJakub Kicinski 1701d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1702d9ae7f2bSJakub Kicinski { 17039f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 17049f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 17059f16c8abSJakub Kicinski u8 dst; 17069f16c8abSJakub Kicinski 17079f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 17089f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 17099f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 17109f16c8abSJakub Kicinski 17119f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 17129f16c8abSJakub Kicinski 17139f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 17149f16c8abSJakub Kicinski if (imm_hi == imm_lo) 17159f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 17169f16c8abSJakub Kicinski else 17179f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 1718d9ae7f2bSJakub Kicinski 1719d9ae7f2bSJakub Kicinski return 0; 1720d9ae7f2bSJakub Kicinski } 1721d9ae7f2bSJakub Kicinski 1722d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1723d9ae7f2bSJakub Kicinski { 1724d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1725d9ae7f2bSJakub Kicinski return 0; 1726d9ae7f2bSJakub Kicinski } 1727d9ae7f2bSJakub Kicinski 1728d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1729d9ae7f2bSJakub Kicinski { 1730d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1731d9ae7f2bSJakub Kicinski } 1732d9ae7f2bSJakub Kicinski 1733d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1734d9ae7f2bSJakub Kicinski { 1735d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1736d9ae7f2bSJakub Kicinski } 1737d9ae7f2bSJakub Kicinski 1738d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1739d9ae7f2bSJakub Kicinski { 1740d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1741d9ae7f2bSJakub Kicinski } 1742d9ae7f2bSJakub Kicinski 1743d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1744d9ae7f2bSJakub Kicinski { 1745d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17460a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 1747d9ae7f2bSJakub Kicinski } 1748d9ae7f2bSJakub Kicinski 1749d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1750d9ae7f2bSJakub Kicinski { 1751d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17520a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 1753d9ae7f2bSJakub Kicinski } 1754d9ae7f2bSJakub Kicinski 1755d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1756d9ae7f2bSJakub Kicinski { 1757d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17580a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 1759d9ae7f2bSJakub Kicinski } 1760d9ae7f2bSJakub Kicinski 1761a82b23fbSJakub Kicinski static int 1762a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1763d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1764a82b23fbSJakub Kicinski { 1765d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1766b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 1767b14157eeSJakub Kicinski true, wrp_lmem_load); 1768a82b23fbSJakub Kicinski } 1769a82b23fbSJakub Kicinski 1770943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1771943c57b9SJakub Kicinski u8 size) 1772d9ae7f2bSJakub Kicinski { 1773bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1774bfddbc8aSJakub Kicinski 1775943c57b9SJakub Kicinski switch (meta->insn.off) { 1776c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 1777c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 1778943c57b9SJakub Kicinski return -EOPNOTSUPP; 1779bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 1780bfddbc8aSJakub Kicinski break; 1781c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 1782c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 1783bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1784bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1785bfddbc8aSJakub Kicinski break; 1786c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 1787c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 1788bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1789bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 1790bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1791943c57b9SJakub Kicinski break; 1792943c57b9SJakub Kicinski default: 1793d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1794943c57b9SJakub Kicinski } 1795943c57b9SJakub Kicinski 1796943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1797d9ae7f2bSJakub Kicinski 1798d9ae7f2bSJakub Kicinski return 0; 1799d9ae7f2bSJakub Kicinski } 1800d9ae7f2bSJakub Kicinski 1801943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1802943c57b9SJakub Kicinski u8 size) 1803d9ae7f2bSJakub Kicinski { 1804b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1805d9ae7f2bSJakub Kicinski 1806943c57b9SJakub Kicinski switch (meta->insn.off) { 1807c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 1808c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 1809c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1810c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1811943c57b9SJakub Kicinski break; 1812c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 1813c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 1814c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1815943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 1816943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1817943c57b9SJakub Kicinski break; 1818943c57b9SJakub Kicinski default: 1819943c57b9SJakub Kicinski return -EOPNOTSUPP; 1820943c57b9SJakub Kicinski } 1821d9ae7f2bSJakub Kicinski 1822943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1823d9ae7f2bSJakub Kicinski 1824d9ae7f2bSJakub Kicinski return 0; 1825d9ae7f2bSJakub Kicinski } 1826d9ae7f2bSJakub Kicinski 18272ca71441SJakub Kicinski static int 18282ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18292ca71441SJakub Kicinski unsigned int size) 18302ca71441SJakub Kicinski { 18312ca71441SJakub Kicinski swreg tmp_reg; 18322ca71441SJakub Kicinski 18332ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18342ca71441SJakub Kicinski 18353dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 18363dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18373dd43c33SJakub Kicinski } 18383dd43c33SJakub Kicinski 18393dd43c33SJakub Kicinski static int 18403dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18413dd43c33SJakub Kicinski unsigned int size) 18423dd43c33SJakub Kicinski { 18433dd43c33SJakub Kicinski swreg tmp_reg; 18443dd43c33SJakub Kicinski 18453dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18463dd43c33SJakub Kicinski 18473dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 18483dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18492ca71441SJakub Kicinski } 18502ca71441SJakub Kicinski 1851be759237SJiong Wang static void 1852be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 1853be759237SJiong Wang struct nfp_insn_meta *meta) 1854be759237SJiong Wang { 1855be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 1856be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 1857be759237SJiong Wang swreg src_base, off; 1858be759237SJiong Wang u8 xfer_num, len; 1859be759237SJiong Wang bool indir; 1860be759237SJiong Wang 1861be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 1862be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 1863be759237SJiong Wang len = range_end - range_start; 1864be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 1865be759237SJiong Wang 1866be759237SJiong Wang indir = len > 8 * REG_WIDTH; 1867be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 1868be759237SJiong Wang if (indir) 1869be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 1870be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 1871be759237SJiong Wang 1872be759237SJiong Wang /* Cache memory into transfer-in registers. */ 1873be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 1874b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 1875be759237SJiong Wang } 1876be759237SJiong Wang 1877be759237SJiong Wang static int 187891ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 187991ff69e8SJiong Wang struct nfp_insn_meta *meta, 188091ff69e8SJiong Wang unsigned int size) 188191ff69e8SJiong Wang { 188291ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 188391ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 188491ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 188591ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 188691ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 188791ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 188891ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 188991ff69e8SJiong Wang 189091ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 189191ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 189291ff69e8SJiong Wang src_lo = reg_xfer(idx); 189391ff69e8SJiong Wang 189491ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 189591ff69e8SJiong Wang if (size > REG_WIDTH - off) { 189691ff69e8SJiong Wang /* Calculate the part in the second register. */ 189791ff69e8SJiong Wang len_lo = REG_WIDTH - off; 189891ff69e8SJiong Wang len_mid = size - len_lo; 189991ff69e8SJiong Wang 190091ff69e8SJiong Wang /* Calculate the part in the third register. */ 190191ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 190291ff69e8SJiong Wang len_mid = REG_WIDTH; 190391ff69e8SJiong Wang } 190491ff69e8SJiong Wang 190591ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 190691ff69e8SJiong Wang 190791ff69e8SJiong Wang if (!len_mid) { 190891ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 190991ff69e8SJiong Wang return 0; 191091ff69e8SJiong Wang } 191191ff69e8SJiong Wang 191291ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 191391ff69e8SJiong Wang 191491ff69e8SJiong Wang if (size <= REG_WIDTH) { 191591ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 191691ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 191791ff69e8SJiong Wang } else { 191891ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 191991ff69e8SJiong Wang 192091ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 192191ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 192291ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 192391ff69e8SJiong Wang REG_WIDTH - len_lo); 192491ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 192591ff69e8SJiong Wang len_lo); 192691ff69e8SJiong Wang } 192791ff69e8SJiong Wang 192891ff69e8SJiong Wang return 0; 192991ff69e8SJiong Wang } 193091ff69e8SJiong Wang 193191ff69e8SJiong Wang static int 1932be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 1933be759237SJiong Wang struct nfp_insn_meta *meta, 1934be759237SJiong Wang unsigned int size) 1935be759237SJiong Wang { 1936be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 1937be759237SJiong Wang u8 dst_gpr, idx; 1938be759237SJiong Wang 1939be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 1940be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 1941be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 1942be759237SJiong Wang dst_lo = reg_both(dst_gpr); 1943be759237SJiong Wang src_lo = reg_xfer(idx); 1944be759237SJiong Wang 1945be759237SJiong Wang if (size < REG_WIDTH) { 1946be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 1947be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1948be759237SJiong Wang } else if (size == REG_WIDTH) { 1949be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1950be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1951be759237SJiong Wang } else { 1952be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 1953be759237SJiong Wang 1954be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1955be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 1956be759237SJiong Wang } 1957be759237SJiong Wang 1958be759237SJiong Wang return 0; 1959be759237SJiong Wang } 1960be759237SJiong Wang 1961be759237SJiong Wang static int 1962be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 1963be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 1964be759237SJiong Wang { 1965be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 1966be759237SJiong Wang 196791ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 1968be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 196991ff69e8SJiong Wang 197091ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 1971be759237SJiong Wang } 1972be759237SJiong Wang 19732ca71441SJakub Kicinski static int 19742ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 19752ca71441SJakub Kicinski unsigned int size) 19762ca71441SJakub Kicinski { 19779879a381SJiong Wang if (meta->ldst_gather_len) 19789879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 19799879a381SJiong Wang 19802ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 1981012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 19822ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 19832ca71441SJakub Kicinski else 19842ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 19852ca71441SJakub Kicinski } 19862ca71441SJakub Kicinski 1987be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 1988be759237SJiong Wang if (meta->pkt_cache.range_end) { 1989be759237SJiong Wang if (meta->pkt_cache.do_init) 1990be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 1991be759237SJiong Wang 1992be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 1993be759237SJiong Wang } else { 19942ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 1995be759237SJiong Wang } 1996be759237SJiong Wang } 19972ca71441SJakub Kicinski 1998a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 1999d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2000d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2001a82b23fbSJakub Kicinski 20023dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 20033dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 20043dd43c33SJakub Kicinski 20052ca71441SJakub Kicinski return -EOPNOTSUPP; 20062ca71441SJakub Kicinski } 20072ca71441SJakub Kicinski 20082ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20092ca71441SJakub Kicinski { 20102ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 20112ca71441SJakub Kicinski } 20122ca71441SJakub Kicinski 20132ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20142ca71441SJakub Kicinski { 20152ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 20162ca71441SJakub Kicinski } 20172ca71441SJakub Kicinski 2018d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2019d9ae7f2bSJakub Kicinski { 20202ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 20212ca71441SJakub Kicinski } 20222ca71441SJakub Kicinski 20232ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20242ca71441SJakub Kicinski { 20252ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2026d9ae7f2bSJakub Kicinski } 2027d9ae7f2bSJakub Kicinski 2028e663fe38SJakub Kicinski static int 2029e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2030e663fe38SJakub Kicinski unsigned int size) 2031d9ae7f2bSJakub Kicinski { 2032e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2033e663fe38SJakub Kicinski swreg off_reg; 2034e663fe38SJakub Kicinski 2035e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2036e663fe38SJakub Kicinski 2037e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2038e663fe38SJakub Kicinski imm, size); 2039e663fe38SJakub Kicinski } 2040e663fe38SJakub Kicinski 2041e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2042e663fe38SJakub Kicinski unsigned int size) 2043e663fe38SJakub Kicinski { 2044e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2045e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2046e663fe38SJakub Kicinski 2047d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2048d9ae7f2bSJakub Kicinski } 2049d9ae7f2bSJakub Kicinski 2050e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2051d9ae7f2bSJakub Kicinski { 2052e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2053e663fe38SJakub Kicinski } 2054e663fe38SJakub Kicinski 2055e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2056e663fe38SJakub Kicinski { 2057e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2058e663fe38SJakub Kicinski } 2059e663fe38SJakub Kicinski 2060e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2061e663fe38SJakub Kicinski { 2062e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2063e663fe38SJakub Kicinski } 2064e663fe38SJakub Kicinski 2065e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2066e663fe38SJakub Kicinski { 2067e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2068e663fe38SJakub Kicinski } 2069e663fe38SJakub Kicinski 2070e663fe38SJakub Kicinski static int 2071e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2072e663fe38SJakub Kicinski unsigned int size) 2073e663fe38SJakub Kicinski { 2074e663fe38SJakub Kicinski swreg off_reg; 2075e663fe38SJakub Kicinski 2076e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2077e663fe38SJakub Kicinski 2078e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2079e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2080e663fe38SJakub Kicinski } 2081e663fe38SJakub Kicinski 2082e663fe38SJakub Kicinski static int 2083ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2084d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2085ee9133a8SJakub Kicinski { 2086d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2087b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2088b14157eeSJakub Kicinski false, wrp_lmem_store); 2089ee9133a8SJakub Kicinski } 2090ee9133a8SJakub Kicinski 2091ee9133a8SJakub Kicinski static int 2092e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2093e663fe38SJakub Kicinski unsigned int size) 2094e663fe38SJakub Kicinski { 2095e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2096e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2097e663fe38SJakub Kicinski 2098ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2099d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2100d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2101ee9133a8SJakub Kicinski 2102d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2103d9ae7f2bSJakub Kicinski } 2104d9ae7f2bSJakub Kicinski 2105e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2106e663fe38SJakub Kicinski { 2107e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2108e663fe38SJakub Kicinski } 2109e663fe38SJakub Kicinski 2110e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2111e663fe38SJakub Kicinski { 2112e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2113e663fe38SJakub Kicinski } 2114e663fe38SJakub Kicinski 2115d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2116d9ae7f2bSJakub Kicinski { 2117e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2118e663fe38SJakub Kicinski } 21192ca71441SJakub Kicinski 2120e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2121e663fe38SJakub Kicinski { 2122e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2123d9ae7f2bSJakub Kicinski } 2124d9ae7f2bSJakub Kicinski 2125dcb0c27fSJakub Kicinski static int 2126dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2127dcb0c27fSJakub Kicinski { 2128dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2129dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 213041aed09cSJakub Kicinski unsigned int full_add, out; 213141aed09cSJakub Kicinski swreg addra, addrb, off; 2132dcb0c27fSJakub Kicinski 2133dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2134dcb0c27fSJakub Kicinski 213541aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 213641aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 213741aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 213841aed09cSJakub Kicinski * code for both. 213941aed09cSJakub Kicinski */ 214041aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 214141aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 214241aed09cSJakub Kicinski 214341aed09cSJakub Kicinski if (meta->insn.off) { 214441aed09cSJakub Kicinski out += 2; 214541aed09cSJakub Kicinski full_add += 2; 214641aed09cSJakub Kicinski } 214741aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 214841aed09cSJakub Kicinski out += 3; 214941aed09cSJakub Kicinski full_add += 3; 215041aed09cSJakub Kicinski } 215141aed09cSJakub Kicinski if (meta->xadd_over_16bit) 215241aed09cSJakub Kicinski out += 2 + is64; 215341aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 215441aed09cSJakub Kicinski out += 5; 215541aed09cSJakub Kicinski full_add += 5; 215641aed09cSJakub Kicinski } 215741aed09cSJakub Kicinski 215841aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 215941aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 216041aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 216141aed09cSJakub Kicinski 216241aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 216341aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 216441aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 216541aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 216641aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 216741aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 216841aed09cSJakub Kicinski /* defer for add */ 216941aed09cSJakub Kicinski } 217041aed09cSJakub Kicinski 2171dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2172dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2173dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2174dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2175dcb0c27fSJakub Kicinski } else { 2176dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2177dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2178dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2179dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2180dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2181dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2182dcb0c27fSJakub Kicinski } 2183dcb0c27fSJakub Kicinski 218441aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 218541aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 218641aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 218741aed09cSJakub Kicinski 2188dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2189dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2190dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2191dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2192dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2193dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2194b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2195dcb0c27fSJakub Kicinski 219641aed09cSJakub Kicinski if (meta->xadd_over_16bit) 219741aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 219841aed09cSJakub Kicinski } 219941aed09cSJakub Kicinski 220041aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 220141aed09cSJakub Kicinski return -EINVAL; 220241aed09cSJakub Kicinski 220341aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 220441aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 220541aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 220641aed09cSJakub Kicinski addra, addrb, is64 << 2, 220741aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 220841aed09cSJakub Kicinski 220941aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 221041aed09cSJakub Kicinski if (is64) 221141aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 221241aed09cSJakub Kicinski } 221341aed09cSJakub Kicinski 221441aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 221541aed09cSJakub Kicinski return -EINVAL; 221641aed09cSJakub Kicinski 2217dcb0c27fSJakub Kicinski return 0; 2218dcb0c27fSJakub Kicinski } 2219dcb0c27fSJakub Kicinski 2220dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2221dcb0c27fSJakub Kicinski { 2222dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2223dcb0c27fSJakub Kicinski } 2224dcb0c27fSJakub Kicinski 2225dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2226dcb0c27fSJakub Kicinski { 2227dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2228dcb0c27fSJakub Kicinski } 2229dcb0c27fSJakub Kicinski 2230d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2231d9ae7f2bSJakub Kicinski { 2232d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2233d9ae7f2bSJakub Kicinski 2234d9ae7f2bSJakub Kicinski return 0; 2235d9ae7f2bSJakub Kicinski } 2236d9ae7f2bSJakub Kicinski 2237d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2238d9ae7f2bSJakub Kicinski { 2239d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2240d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2241b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2242b3f868dfSJakub Kicinski 2243b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2244b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2245d9ae7f2bSJakub Kicinski 2246d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2247d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2248d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2249d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2250d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2251d9ae7f2bSJakub Kicinski } 2252d9ae7f2bSJakub Kicinski 2253d9ae7f2bSJakub Kicinski if (imm >> 32) { 2254d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2255d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2256d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2257d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2258d9ae7f2bSJakub Kicinski } 2259d9ae7f2bSJakub Kicinski 2260d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2261d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2262d9ae7f2bSJakub Kicinski 2263d9ae7f2bSJakub Kicinski return 0; 2264d9ae7f2bSJakub Kicinski } 2265d9ae7f2bSJakub Kicinski 2266d9ae7f2bSJakub Kicinski static int jgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2267d9ae7f2bSJakub Kicinski { 226826fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true); 2269d9ae7f2bSJakub Kicinski } 2270d9ae7f2bSJakub Kicinski 2271d9ae7f2bSJakub Kicinski static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2272d9ae7f2bSJakub Kicinski { 227326fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false); 2274d9ae7f2bSJakub Kicinski } 2275d9ae7f2bSJakub Kicinski 22765dd294d4SDaniel Borkmann static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22775dd294d4SDaniel Borkmann { 227826fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, false); 22795dd294d4SDaniel Borkmann } 22805dd294d4SDaniel Borkmann 22815dd294d4SDaniel Borkmann static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22825dd294d4SDaniel Borkmann { 228326fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); 22845dd294d4SDaniel Borkmann } 22855dd294d4SDaniel Borkmann 2286c087aa8bSNic Viljoen static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2287c087aa8bSNic Viljoen { 2288c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true); 2289c087aa8bSNic Viljoen } 2290c087aa8bSNic Viljoen 2291c087aa8bSNic Viljoen static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2292c087aa8bSNic Viljoen { 2293c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false); 2294c087aa8bSNic Viljoen } 2295c087aa8bSNic Viljoen 2296c087aa8bSNic Viljoen static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2297c087aa8bSNic Viljoen { 2298c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false); 2299c087aa8bSNic Viljoen } 2300c087aa8bSNic Viljoen 2301c087aa8bSNic Viljoen static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2302c087aa8bSNic Viljoen { 2303c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true); 2304c087aa8bSNic Viljoen } 2305c087aa8bSNic Viljoen 2306d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2307d9ae7f2bSJakub Kicinski { 2308d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2309d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2310b3f868dfSJakub Kicinski swreg tmp_reg; 2311d9ae7f2bSJakub Kicinski 2312d9ae7f2bSJakub Kicinski if (!imm) { 2313d9ae7f2bSJakub Kicinski meta->skip = true; 2314d9ae7f2bSJakub Kicinski return 0; 2315d9ae7f2bSJakub Kicinski } 2316d9ae7f2bSJakub Kicinski 2317d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2318d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2319d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2320d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2321d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2322d9ae7f2bSJakub Kicinski } 2323d9ae7f2bSJakub Kicinski 2324d9ae7f2bSJakub Kicinski if (imm >> 32) { 2325d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2326d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2327d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2328d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2329d9ae7f2bSJakub Kicinski } 2330d9ae7f2bSJakub Kicinski 2331d9ae7f2bSJakub Kicinski return 0; 2332d9ae7f2bSJakub Kicinski } 2333d9ae7f2bSJakub Kicinski 2334d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2335d9ae7f2bSJakub Kicinski { 2336d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2337d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2338b3f868dfSJakub Kicinski swreg tmp_reg; 2339d9ae7f2bSJakub Kicinski 2340d9ae7f2bSJakub Kicinski if (!imm) { 2341d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2342d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2343d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 234482837370SJakub Kicinski return 0; 2345d9ae7f2bSJakub Kicinski } 2346d9ae7f2bSJakub Kicinski 2347d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2348d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2349d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2350d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2351d9ae7f2bSJakub Kicinski 2352d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2353d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2354d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2355d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2356d9ae7f2bSJakub Kicinski 2357d9ae7f2bSJakub Kicinski return 0; 2358d9ae7f2bSJakub Kicinski } 2359d9ae7f2bSJakub Kicinski 2360d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2361d9ae7f2bSJakub Kicinski { 2362d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2363d9ae7f2bSJakub Kicinski 2364d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2365d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2366d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2367d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2368d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2369d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2370d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2371d9ae7f2bSJakub Kicinski 2372d9ae7f2bSJakub Kicinski return 0; 2373d9ae7f2bSJakub Kicinski } 2374d9ae7f2bSJakub Kicinski 2375d9ae7f2bSJakub Kicinski static int jgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2376d9ae7f2bSJakub Kicinski { 237726fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true); 2378d9ae7f2bSJakub Kicinski } 2379d9ae7f2bSJakub Kicinski 2380d9ae7f2bSJakub Kicinski static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2381d9ae7f2bSJakub Kicinski { 238226fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false); 2383d9ae7f2bSJakub Kicinski } 2384d9ae7f2bSJakub Kicinski 23855dd294d4SDaniel Borkmann static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23865dd294d4SDaniel Borkmann { 238726fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, false); 23885dd294d4SDaniel Borkmann } 23895dd294d4SDaniel Borkmann 23905dd294d4SDaniel Borkmann static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23915dd294d4SDaniel Borkmann { 239226fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); 23935dd294d4SDaniel Borkmann } 23945dd294d4SDaniel Borkmann 2395c087aa8bSNic Viljoen static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2396c087aa8bSNic Viljoen { 2397c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true); 2398c087aa8bSNic Viljoen } 2399c087aa8bSNic Viljoen 2400c087aa8bSNic Viljoen static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2401c087aa8bSNic Viljoen { 2402c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false); 2403c087aa8bSNic Viljoen } 2404c087aa8bSNic Viljoen 2405c087aa8bSNic Viljoen static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2406c087aa8bSNic Viljoen { 2407c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false); 2408c087aa8bSNic Viljoen } 2409c087aa8bSNic Viljoen 2410c087aa8bSNic Viljoen static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2411c087aa8bSNic Viljoen { 2412c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, true); 2413c087aa8bSNic Viljoen } 2414c087aa8bSNic Viljoen 2415d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2416d9ae7f2bSJakub Kicinski { 2417d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2418d9ae7f2bSJakub Kicinski } 2419d9ae7f2bSJakub Kicinski 2420d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2421d9ae7f2bSJakub Kicinski { 2422d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2423d9ae7f2bSJakub Kicinski } 2424d9ae7f2bSJakub Kicinski 24252cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24262cb230bdSJakub Kicinski { 24272cb230bdSJakub Kicinski switch (meta->insn.imm) { 24280d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 24290d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 243077a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 243144d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 2432bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 2433fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 24342cb230bdSJakub Kicinski default: 24352cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 24362cb230bdSJakub Kicinski return -EOPNOTSUPP; 24372cb230bdSJakub Kicinski } 24382cb230bdSJakub Kicinski } 24392cb230bdSJakub Kicinski 2440d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2441d9ae7f2bSJakub Kicinski { 2442e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2443d9ae7f2bSJakub Kicinski 2444d9ae7f2bSJakub Kicinski return 0; 2445d9ae7f2bSJakub Kicinski } 2446d9ae7f2bSJakub Kicinski 2447d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2448d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2449d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2450d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2451d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2452d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2453d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2454d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2455d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2456d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2457d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2458d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2459d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2460254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2461d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2462d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2463d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2464d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2465d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2466d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2467d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2468d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2469d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2470d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2471d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2472d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2473d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2474d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2475254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2476d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 24773119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2478d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2479d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2480d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2481d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2482d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2483d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2484d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 24852ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 24862ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2487d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 24882ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2489e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2490e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2491d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2492e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2493dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 2494dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 2495e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2496e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2497e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2498e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2499d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2500d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 2501d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = jgt_imm, 2502d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, 25035dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, 25045dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, 2505c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_K] = jsgt_imm, 2506c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_K] = jsge_imm, 2507c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_K] = jslt_imm, 2508c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_K] = jsle_imm, 2509d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2510d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2511d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 2512d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = jgt_reg, 2513d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, 25145dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, 25155dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, 2516c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_X] = jsgt_reg, 2517c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_X] = jsge_reg, 2518c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_X] = jslt_reg, 2519c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_X] = jsle_reg, 2520d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2521d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 25222cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2523d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2524d9ae7f2bSJakub Kicinski }; 2525d9ae7f2bSJakub Kicinski 2526d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2527d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2528d9ae7f2bSJakub Kicinski { 25295b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2530854dc87dSJiong Wang u32 idx, br_idx; 2531d9ae7f2bSJakub Kicinski 2532854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2533d9ae7f2bSJakub Kicinski if (meta->skip) 2534d9ae7f2bSJakub Kicinski continue; 25352cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 25362cb230bdSJakub Kicinski continue; 2537d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2538d9ae7f2bSJakub Kicinski continue; 2539d9ae7f2bSJakub Kicinski 25405b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 25412314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 25425b674140SJiong Wang else 25432314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2544854dc87dSJiong Wang 2545d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2546d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2547d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2548d9ae7f2bSJakub Kicinski return -ELOOP; 2549d9ae7f2bSJakub Kicinski } 2550d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 25512314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 25522314fe9eSJakub Kicinski RELO_BR_REL) 2553d9ae7f2bSJakub Kicinski continue; 2554d9ae7f2bSJakub Kicinski 25555b674140SJiong Wang if (!meta->jmp_dst) { 25565b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2557d9ae7f2bSJakub Kicinski return -ELOOP; 2558d9ae7f2bSJakub Kicinski } 2559d9ae7f2bSJakub Kicinski 25605b674140SJiong Wang jmp_dst = meta->jmp_dst; 2561854dc87dSJiong Wang 25625b674140SJiong Wang if (jmp_dst->skip) { 2563d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2564d9ae7f2bSJakub Kicinski return -ELOOP; 2565d9ae7f2bSJakub Kicinski } 2566d9ae7f2bSJakub Kicinski 25672314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2568d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2569d9ae7f2bSJakub Kicinski continue; 25705b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2571d9ae7f2bSJakub Kicinski } 2572d9ae7f2bSJakub Kicinski } 2573d9ae7f2bSJakub Kicinski 2574d9ae7f2bSJakub Kicinski return 0; 2575d9ae7f2bSJakub Kicinski } 2576d9ae7f2bSJakub Kicinski 2577d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2578d9ae7f2bSJakub Kicinski { 257918e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 258018e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 258118e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2582d9ae7f2bSJakub Kicinski } 2583d9ae7f2bSJakub Kicinski 2584d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2585d9ae7f2bSJakub Kicinski { 2586d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2587d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2588d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2589d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2590d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2591d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2592d9ae7f2bSJakub Kicinski * 2593d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2594d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2595d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2596d9ae7f2bSJakub Kicinski * packets up the stack. 2597d9ae7f2bSJakub Kicinski */ 2598d9ae7f2bSJakub Kicinski /* Target for aborts */ 2599d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2600d9ae7f2bSJakub Kicinski 2601e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2602d9ae7f2bSJakub Kicinski 2603c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2604d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2605d9ae7f2bSJakub Kicinski 2606d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2607d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2608d9ae7f2bSJakub Kicinski 2609d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2610d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2611d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2612c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2613d9ae7f2bSJakub Kicinski 2614d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2615d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2616d9ae7f2bSJakub Kicinski 2617d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2618d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2619d9ae7f2bSJakub Kicinski 2620d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2621d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2622d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2623d9ae7f2bSJakub Kicinski 2624d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2625d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2626d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2627d9ae7f2bSJakub Kicinski 2628e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2629d9ae7f2bSJakub Kicinski 2630d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2631d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2632d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2633d9ae7f2bSJakub Kicinski } 2634d9ae7f2bSJakub Kicinski 2635d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2636d9ae7f2bSJakub Kicinski { 2637d9ae7f2bSJakub Kicinski /* XDP return codes: 2638d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2639d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2640d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2641d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2642d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2643d9ae7f2bSJakub Kicinski */ 2644d9ae7f2bSJakub Kicinski /* Target for aborts */ 2645d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2646d9ae7f2bSJakub Kicinski 2647e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2648d9ae7f2bSJakub Kicinski 2649c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2650d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2651d9ae7f2bSJakub Kicinski 2652d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2653d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2654d9ae7f2bSJakub Kicinski 2655d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2656d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2657d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2658d9ae7f2bSJakub Kicinski 2659d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2660d9ae7f2bSJakub Kicinski 2661d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2662d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2663d9ae7f2bSJakub Kicinski 2664d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2665d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2666d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2667d9ae7f2bSJakub Kicinski 2668e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2669d9ae7f2bSJakub Kicinski 2670c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2671d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2672d9ae7f2bSJakub Kicinski } 2673d9ae7f2bSJakub Kicinski 2674d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2675d9ae7f2bSJakub Kicinski { 2676012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2677012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2678d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2679d9ae7f2bSJakub Kicinski break; 2680012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2681d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2682d9ae7f2bSJakub Kicinski break; 2683012bb8a8SJakub Kicinski default: 2684012bb8a8SJakub Kicinski WARN_ON(1); 2685d9ae7f2bSJakub Kicinski } 2686d9ae7f2bSJakub Kicinski } 2687d9ae7f2bSJakub Kicinski 2688d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2689d9ae7f2bSJakub Kicinski { 2690d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2691ff42bb9fSJakub Kicinski int err; 2692d9ae7f2bSJakub Kicinski 2693d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2694d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2695d9ae7f2bSJakub Kicinski return nfp_prog->error; 2696d9ae7f2bSJakub Kicinski 2697d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2698d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2699d9ae7f2bSJakub Kicinski 2700d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2701d9ae7f2bSJakub Kicinski 2702d9ae7f2bSJakub Kicinski if (meta->skip) { 2703d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2704d9ae7f2bSJakub Kicinski continue; 2705d9ae7f2bSJakub Kicinski } 2706d9ae7f2bSJakub Kicinski 2707d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2708d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2709d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2710d9ae7f2bSJakub Kicinski if (!cb) 2711d9ae7f2bSJakub Kicinski return -ENOENT; 2712d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2713d9ae7f2bSJakub Kicinski if (err) 2714d9ae7f2bSJakub Kicinski return err; 2715d9ae7f2bSJakub Kicinski 2716d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2717d9ae7f2bSJakub Kicinski } 2718d9ae7f2bSJakub Kicinski 2719854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 2720854dc87dSJiong Wang 2721d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 2722d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2723d9ae7f2bSJakub Kicinski return nfp_prog->error; 2724d9ae7f2bSJakub Kicinski 2725ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 27261c03e03fSJakub Kicinski if (nfp_prog->error) 27271c03e03fSJakub Kicinski return nfp_prog->error; 27281c03e03fSJakub Kicinski 2729d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 2730d9ae7f2bSJakub Kicinski } 2731d9ae7f2bSJakub Kicinski 2732d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 2733d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 2734d9ae7f2bSJakub Kicinski { 2735d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2736d9ae7f2bSJakub Kicinski 2737d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2738d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 2739d9ae7f2bSJakub Kicinski 2740d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 2741d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 2742d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 2743d9ae7f2bSJakub Kicinski continue; 2744d9ae7f2bSJakub Kicinski 2745d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 2746d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 2747d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 2748d9ae7f2bSJakub Kicinski meta->skip = true; 2749d9ae7f2bSJakub Kicinski 2750d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 2751d9ae7f2bSJakub Kicinski if (!meta->skip) 2752d9ae7f2bSJakub Kicinski return; 2753d9ae7f2bSJakub Kicinski } 2754d9ae7f2bSJakub Kicinski } 2755d9ae7f2bSJakub Kicinski 2756d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 2757d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 2758d9ae7f2bSJakub Kicinski { 2759d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 2760d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 2761d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 2762d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 2763d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 2764d9ae7f2bSJakub Kicinski }; 2765d9ae7f2bSJakub Kicinski 2766d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 2767d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 2768d9ae7f2bSJakub Kicinski 2769d9ae7f2bSJakub Kicinski insn = meta1->insn; 2770d9ae7f2bSJakub Kicinski next = meta2->insn; 2771d9ae7f2bSJakub Kicinski 2772d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2773d9ae7f2bSJakub Kicinski continue; 2774d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2775d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2776d9ae7f2bSJakub Kicinski continue; 2777d9ae7f2bSJakub Kicinski 2778d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 2779d9ae7f2bSJakub Kicinski continue; 2780d9ae7f2bSJakub Kicinski 2781d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 2782d9ae7f2bSJakub Kicinski continue; 2783d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 2784d9ae7f2bSJakub Kicinski continue; 2785d9ae7f2bSJakub Kicinski 2786d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 2787d9ae7f2bSJakub Kicinski continue; 2788d9ae7f2bSJakub Kicinski 27891266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 27901266f5d6SJiong Wang continue; 27911266f5d6SJiong Wang 2792d9ae7f2bSJakub Kicinski meta2->skip = true; 2793d9ae7f2bSJakub Kicinski } 2794d9ae7f2bSJakub Kicinski } 2795d9ae7f2bSJakub Kicinski 2796d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 2797d9ae7f2bSJakub Kicinski { 2798d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 2799d9ae7f2bSJakub Kicinski 2800d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 2801d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 2802d9ae7f2bSJakub Kicinski 2803d9ae7f2bSJakub Kicinski insn = meta1->insn; 2804d9ae7f2bSJakub Kicinski next1 = meta2->insn; 2805d9ae7f2bSJakub Kicinski next2 = meta3->insn; 2806d9ae7f2bSJakub Kicinski 2807d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2808d9ae7f2bSJakub Kicinski continue; 2809d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2810d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2811d9ae7f2bSJakub Kicinski continue; 2812d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 2813d9ae7f2bSJakub Kicinski continue; 2814d9ae7f2bSJakub Kicinski 2815d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 2816d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 2817d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 2818d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 2819d9ae7f2bSJakub Kicinski continue; 2820d9ae7f2bSJakub Kicinski 2821d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 2822d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 2823d9ae7f2bSJakub Kicinski continue; 2824d9ae7f2bSJakub Kicinski 2825d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 2826d9ae7f2bSJakub Kicinski continue; 2827d9ae7f2bSJakub Kicinski 282829fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 282929fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 283029fe46efSJiong Wang continue; 283129fe46efSJiong Wang 2832d9ae7f2bSJakub Kicinski meta2->skip = true; 2833d9ae7f2bSJakub Kicinski meta3->skip = true; 2834d9ae7f2bSJakub Kicinski } 2835d9ae7f2bSJakub Kicinski } 2836d9ae7f2bSJakub Kicinski 28376bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 28386bc7103cSJiong Wang * 28396bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 28406bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 28416bc7103cSJiong Wang * 28426bc7103cSJiong Wang * The destination register of load and source register of store should 28436bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 28446bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 28456bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 28466bc7103cSJiong Wang */ 28476bc7103cSJiong Wang static bool 28486bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 28496bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 28506bc7103cSJiong Wang { 28516bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 28526bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 28536bc7103cSJiong Wang 28546bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 28556bc7103cSJiong Wang return false; 28566bc7103cSJiong Wang 28576bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 28586bc7103cSJiong Wang return false; 28596bc7103cSJiong Wang 28606bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 28616bc7103cSJiong Wang return false; 28626bc7103cSJiong Wang 28636bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 28646bc7103cSJiong Wang return false; 28656bc7103cSJiong Wang 28666bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 28676bc7103cSJiong Wang return false; 28686bc7103cSJiong Wang 28696bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 28706bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 28716bc7103cSJiong Wang return false; 28726bc7103cSJiong Wang 28736bc7103cSJiong Wang return true; 28746bc7103cSJiong Wang } 28756bc7103cSJiong Wang 28766bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 28776bc7103cSJiong Wang * 28786bc7103cSJiong Wang * - Their address base registers are the same. 28796bc7103cSJiong Wang * - Their address offsets are in the same order. 28806bc7103cSJiong Wang * - They operate at the same memory width. 28816bc7103cSJiong Wang * - There is no jump into the middle of them. 28826bc7103cSJiong Wang */ 28836bc7103cSJiong Wang static bool 28846bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 28856bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 28866bc7103cSJiong Wang struct bpf_insn *prev_ld, 28876bc7103cSJiong Wang struct bpf_insn *prev_st) 28886bc7103cSJiong Wang { 28896bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 28906bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 28916bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 28926bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 28936bc7103cSJiong Wang 28946bc7103cSJiong Wang /* This pair is the start pair. */ 28956bc7103cSJiong Wang if (!prev_ld) 28966bc7103cSJiong Wang return true; 28976bc7103cSJiong Wang 28986bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 28996bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 29006bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 29016bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 29026bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 29036bc7103cSJiong Wang prev_ld_off = prev_ld->off; 29046bc7103cSJiong Wang prev_st_off = prev_st->off; 29056bc7103cSJiong Wang 29066bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 29076bc7103cSJiong Wang return false; 29086bc7103cSJiong Wang 29096bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 29106bc7103cSJiong Wang return false; 29116bc7103cSJiong Wang 29126bc7103cSJiong Wang if (curr_size != prev_size) 29136bc7103cSJiong Wang return false; 29146bc7103cSJiong Wang 29156bc7103cSJiong Wang /* There is jump to the head of this pair. */ 29166bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 29176bc7103cSJiong Wang return false; 29186bc7103cSJiong Wang 29196bc7103cSJiong Wang /* Both in ascending order. */ 29206bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 29216bc7103cSJiong Wang prev_st_off + prev_size == st->off) 29226bc7103cSJiong Wang return true; 29236bc7103cSJiong Wang 29246bc7103cSJiong Wang /* Both in descending order. */ 29256bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 29266bc7103cSJiong Wang st->off + curr_size == prev_st_off) 29276bc7103cSJiong Wang return true; 29286bc7103cSJiong Wang 29296bc7103cSJiong Wang return false; 29306bc7103cSJiong Wang } 29316bc7103cSJiong Wang 29326bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 29336bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 29346bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 29356bc7103cSJiong Wang * as an memory copy. 29366bc7103cSJiong Wang */ 29376bc7103cSJiong Wang static bool 29386bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 29396bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 29406bc7103cSJiong Wang { 29416bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 29426bc7103cSJiong Wang 29436bc7103cSJiong Wang /* Different pointer types does not overlap. */ 29446bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 29456bc7103cSJiong Wang return false; 29466bc7103cSJiong Wang 29476bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 29486bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 29496bc7103cSJiong Wang return true; 29506bc7103cSJiong Wang 29516bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 29526bc7103cSJiong Wang * base register. 29536bc7103cSJiong Wang */ 29546bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 29556bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 29566bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 29576bc7103cSJiong Wang 29586bc7103cSJiong Wang /* Ascending order cross. */ 29596bc7103cSJiong Wang if (ld_off > head_ld_off && 29606bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 29616bc7103cSJiong Wang return true; 29626bc7103cSJiong Wang 29636bc7103cSJiong Wang /* Descending order cross. */ 29646bc7103cSJiong Wang if (ld_off < head_ld_off && 29656bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 29666bc7103cSJiong Wang return true; 29676bc7103cSJiong Wang 29686bc7103cSJiong Wang return false; 29696bc7103cSJiong Wang } 29706bc7103cSJiong Wang 29716bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 29726bc7103cSJiong Wang * 29736bc7103cSJiong Wang * load R, [regA + offA] 29746bc7103cSJiong Wang * store [regB + offB], R 29756bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 29766bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 29776bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 29786bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 29796bc7103cSJiong Wang * ... 29806bc7103cSJiong Wang * 29816bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 29826bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 29836bc7103cSJiong Wang */ 29846bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 29856bc7103cSJiong Wang { 29866bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 29876bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 29886bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 29896bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 29906bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 29916bc7103cSJiong Wang u8 count = 0; 29926bc7103cSJiong Wang 29936bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 29946bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 29956bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 29966bc7103cSJiong Wang 29976bc7103cSJiong Wang /* Reset record status if any of the following if true: 29986bc7103cSJiong Wang * - The current insn pair is not load/store. 29996bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 30006bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 30016bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 30026bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 30036bc7103cSJiong Wang * single NFP CPP command can transfer. 30046bc7103cSJiong Wang */ 30056bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 30066bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 30076bc7103cSJiong Wang prev_st) || 30086bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 30096bc7103cSJiong Wang head_st_meta) || 30106bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 30116bc7103cSJiong Wang if (!count) 30126bc7103cSJiong Wang continue; 30136bc7103cSJiong Wang 30146bc7103cSJiong Wang if (count > 1) { 30156bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 30166bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 30176bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 30186bc7103cSJiong Wang 30196bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 30206bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 30216bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 30226bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 30236bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 30246bc7103cSJiong Wang } 30256bc7103cSJiong Wang 30266bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 30276bc7103cSJiong Wang head_st_meta->skip = true; 30286bc7103cSJiong Wang } else { 30296bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 30306bc7103cSJiong Wang } 30316bc7103cSJiong Wang 30326bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 30336bc7103cSJiong Wang * could serve as the new head of the the next chain. 30346bc7103cSJiong Wang */ 30356bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 30366bc7103cSJiong Wang head_ld_meta = meta1; 30376bc7103cSJiong Wang head_st_meta = meta2; 30386bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 30396bc7103cSJiong Wang BPF_LDST_BYTES(ld); 30406bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 30416bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 30426bc7103cSJiong Wang prev_ld = ld; 30436bc7103cSJiong Wang prev_st = st; 30446bc7103cSJiong Wang count = 1; 30456bc7103cSJiong Wang } else { 30466bc7103cSJiong Wang head_ld_meta = NULL; 30476bc7103cSJiong Wang head_st_meta = NULL; 30486bc7103cSJiong Wang prev_ld = NULL; 30496bc7103cSJiong Wang prev_st = NULL; 30506bc7103cSJiong Wang count = 0; 30516bc7103cSJiong Wang } 30526bc7103cSJiong Wang 30536bc7103cSJiong Wang continue; 30546bc7103cSJiong Wang } 30556bc7103cSJiong Wang 30566bc7103cSJiong Wang if (!head_ld_meta) { 30576bc7103cSJiong Wang head_ld_meta = meta1; 30586bc7103cSJiong Wang head_st_meta = meta2; 30596bc7103cSJiong Wang } else { 30606bc7103cSJiong Wang meta1->skip = true; 30616bc7103cSJiong Wang meta2->skip = true; 30626bc7103cSJiong Wang } 30636bc7103cSJiong Wang 30646bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 30656bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 30666bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 30676bc7103cSJiong Wang prev_ld = ld; 30686bc7103cSJiong Wang prev_st = st; 30696bc7103cSJiong Wang count++; 30706bc7103cSJiong Wang } 30716bc7103cSJiong Wang } 30726bc7103cSJiong Wang 307387b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 307487b10ecdSJiong Wang { 307587b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 307687b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 307787b10ecdSJiong Wang bool cache_avail = false; 307887b10ecdSJiong Wang struct bpf_insn *insn; 307987b10ecdSJiong Wang s32 range_ptr_off = 0; 308087b10ecdSJiong Wang u32 range_ptr_id = 0; 308187b10ecdSJiong Wang 308287b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 308387b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 308487b10ecdSJiong Wang cache_avail = false; 308587b10ecdSJiong Wang 308687b10ecdSJiong Wang if (meta->skip) 308787b10ecdSJiong Wang continue; 308887b10ecdSJiong Wang 308987b10ecdSJiong Wang insn = &meta->insn; 309087b10ecdSJiong Wang 309187b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 309287b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 309387b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 309487b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 309587b10ecdSJiong Wang cache_avail = false; 309687b10ecdSJiong Wang continue; 309787b10ecdSJiong Wang } 309887b10ecdSJiong Wang 309987b10ecdSJiong Wang if (!is_mbpf_load(meta)) 310087b10ecdSJiong Wang continue; 310187b10ecdSJiong Wang 310287b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 310387b10ecdSJiong Wang cache_avail = false; 310487b10ecdSJiong Wang continue; 310587b10ecdSJiong Wang } 310687b10ecdSJiong Wang 310787b10ecdSJiong Wang if (!cache_avail) { 310887b10ecdSJiong Wang cache_avail = true; 310987b10ecdSJiong Wang if (range_node) 311087b10ecdSJiong Wang goto end_current_then_start_new; 311187b10ecdSJiong Wang goto start_new; 311287b10ecdSJiong Wang } 311387b10ecdSJiong Wang 311487b10ecdSJiong Wang /* Check ID to make sure two reads share the same 311587b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 311687b10ecdSJiong Wang * to make sure they also share the same constant 311787b10ecdSJiong Wang * offset. 311887b10ecdSJiong Wang * 311987b10ecdSJiong Wang * OFFs don't really need to be the same, because they 312087b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 312187b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 312287b10ecdSJiong Wang * offsets against original packet pointer. We don't 312387b10ecdSJiong Wang * support this. 312487b10ecdSJiong Wang */ 312587b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 312687b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 312787b10ecdSJiong Wang s16 new_start = range_start; 312887b10ecdSJiong Wang s16 end, off = insn->off; 312987b10ecdSJiong Wang s16 new_end = range_end; 313087b10ecdSJiong Wang bool changed = false; 313187b10ecdSJiong Wang 313287b10ecdSJiong Wang if (off < range_start) { 313387b10ecdSJiong Wang new_start = off; 313487b10ecdSJiong Wang changed = true; 313587b10ecdSJiong Wang } 313687b10ecdSJiong Wang 313787b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 313887b10ecdSJiong Wang if (end > range_end) { 313987b10ecdSJiong Wang new_end = end; 314087b10ecdSJiong Wang changed = true; 314187b10ecdSJiong Wang } 314287b10ecdSJiong Wang 314387b10ecdSJiong Wang if (!changed) 314487b10ecdSJiong Wang continue; 314587b10ecdSJiong Wang 314687b10ecdSJiong Wang if (new_end - new_start <= 64) { 314787b10ecdSJiong Wang /* Install new range. */ 314887b10ecdSJiong Wang range_start = new_start; 314987b10ecdSJiong Wang range_end = new_end; 315087b10ecdSJiong Wang continue; 315187b10ecdSJiong Wang } 315287b10ecdSJiong Wang } 315387b10ecdSJiong Wang 315487b10ecdSJiong Wang end_current_then_start_new: 315587b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 315687b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 315787b10ecdSJiong Wang start_new: 315887b10ecdSJiong Wang range_node = meta; 315987b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 316087b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 316187b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 316287b10ecdSJiong Wang range_start = insn->off; 316387b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 316487b10ecdSJiong Wang } 316587b10ecdSJiong Wang 316687b10ecdSJiong Wang if (range_node) { 316787b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 316887b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 316987b10ecdSJiong Wang } 317087b10ecdSJiong Wang 317187b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 317287b10ecdSJiong Wang if (meta->skip) 317387b10ecdSJiong Wang continue; 317487b10ecdSJiong Wang 317587b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 317687b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 317787b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 317887b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 317987b10ecdSJiong Wang } else { 318087b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 318187b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 318287b10ecdSJiong Wang } 318387b10ecdSJiong Wang } 318487b10ecdSJiong Wang } 318587b10ecdSJiong Wang } 318687b10ecdSJiong Wang 3187d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 3188d9ae7f2bSJakub Kicinski { 3189d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 3190d9ae7f2bSJakub Kicinski 3191d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 3192d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 31936bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 319487b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 3195d9ae7f2bSJakub Kicinski 3196d9ae7f2bSJakub Kicinski return 0; 3197d9ae7f2bSJakub Kicinski } 3198d9ae7f2bSJakub Kicinski 31992314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 3200fd068ddcSJakub Kicinski { 32012314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 3202fd068ddcSJakub Kicinski int i; 3203fd068ddcSJakub Kicinski 32042314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 3205fd068ddcSJakub Kicinski int err; 3206fd068ddcSJakub Kicinski 32072314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 3208fd068ddcSJakub Kicinski if (err) 3209fd068ddcSJakub Kicinski return err; 3210fd068ddcSJakub Kicinski 32112314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 3212fd068ddcSJakub Kicinski } 3213fd068ddcSJakub Kicinski 3214fd068ddcSJakub Kicinski return 0; 3215fd068ddcSJakub Kicinski } 3216fd068ddcSJakub Kicinski 321744a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 321844a12eccSJakub Kicinski { 321944a12eccSJakub Kicinski void *prog; 322044a12eccSJakub Kicinski 322144a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 322244a12eccSJakub Kicinski if (!prog) 322344a12eccSJakub Kicinski return; 322444a12eccSJakub Kicinski 322544a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 322644a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 322744a12eccSJakub Kicinski kvfree(nfp_prog->prog); 322844a12eccSJakub Kicinski nfp_prog->prog = prog; 322944a12eccSJakub Kicinski } 323044a12eccSJakub Kicinski 3231c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3232d9ae7f2bSJakub Kicinski { 3233d9ae7f2bSJakub Kicinski int ret; 3234d9ae7f2bSJakub Kicinski 3235d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 3236d9ae7f2bSJakub Kicinski if (ret) 32379314c442SJakub Kicinski return ret; 3238d9ae7f2bSJakub Kicinski 3239d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 3240d9ae7f2bSJakub Kicinski if (ret) { 3241d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 3242d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 32439314c442SJakub Kicinski return -EINVAL; 3244d9ae7f2bSJakub Kicinski } 3245d9ae7f2bSJakub Kicinski 324644a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 324744a12eccSJakub Kicinski 32482314fe9eSJakub Kicinski return ret; 3249d9ae7f2bSJakub Kicinski } 32501549921dSJakub Kicinski 32511549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 32521549921dSJakub Kicinski { 32531549921dSJakub Kicinski struct nfp_insn_meta *meta; 32541549921dSJakub Kicinski 32551549921dSJakub Kicinski /* Another pass to record jump information. */ 32561549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 32571549921dSJakub Kicinski u64 code = meta->insn.code; 32581549921dSJakub Kicinski 32591549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 32601549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 32611549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 32621549921dSJakub Kicinski unsigned short dst_indx; 32631549921dSJakub Kicinski 32641549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 32651549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 32661549921dSJakub Kicinski cnt); 32671549921dSJakub Kicinski 32681549921dSJakub Kicinski meta->jmp_dst = dst_meta; 32691549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 32701549921dSJakub Kicinski } 32711549921dSJakub Kicinski } 32721549921dSJakub Kicinski } 32732314fe9eSJakub Kicinski 327474801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 327574801e50SQuentin Monnet { 327674801e50SQuentin Monnet return !!instr_cb[code]; 327774801e50SQuentin Monnet } 327874801e50SQuentin Monnet 32792314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 32802314fe9eSJakub Kicinski { 32812314fe9eSJakub Kicinski unsigned int i; 32822314fe9eSJakub Kicinski u64 *prog; 32832314fe9eSJakub Kicinski int err; 32842314fe9eSJakub Kicinski 32852314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 32862314fe9eSJakub Kicinski GFP_KERNEL); 32872314fe9eSJakub Kicinski if (!prog) 32882314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 32892314fe9eSJakub Kicinski 32902314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 32912314fe9eSJakub Kicinski enum nfp_relo_type special; 329277a3d311SJakub Kicinski u32 val; 32932314fe9eSJakub Kicinski 32942314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 32952314fe9eSJakub Kicinski switch (special) { 32962314fe9eSJakub Kicinski case RELO_NONE: 32972314fe9eSJakub Kicinski continue; 32982314fe9eSJakub Kicinski case RELO_BR_REL: 32992314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 33002314fe9eSJakub Kicinski break; 33012314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 33022314fe9eSJakub Kicinski br_set_offset(&prog[i], 33032314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 33042314fe9eSJakub Kicinski break; 33052314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 33062314fe9eSJakub Kicinski br_set_offset(&prog[i], 33072314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 33082314fe9eSJakub Kicinski break; 33092314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 33102314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 33112314fe9eSJakub Kicinski break; 331277a3d311SJakub Kicinski case RELO_BR_HELPER: 331377a3d311SJakub Kicinski val = br_get_offset(prog[i]); 331477a3d311SJakub Kicinski val -= BR_OFF_RELO; 331577a3d311SJakub Kicinski switch (val) { 331677a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 331777a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 331877a3d311SJakub Kicinski break; 331944d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 332044d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 332144d65a47SJakub Kicinski break; 3322bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3323bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 3324bfee64deSJakub Kicinski break; 332577a3d311SJakub Kicinski default: 332677a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 332777a3d311SJakub Kicinski val); 332877a3d311SJakub Kicinski err = -EINVAL; 332977a3d311SJakub Kicinski goto err_free_prog; 333077a3d311SJakub Kicinski } 333177a3d311SJakub Kicinski br_set_offset(&prog[i], val); 333277a3d311SJakub Kicinski break; 333377a3d311SJakub Kicinski case RELO_IMMED_REL: 333477a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 333577a3d311SJakub Kicinski break; 33362314fe9eSJakub Kicinski } 33372314fe9eSJakub Kicinski 33382314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 33392314fe9eSJakub Kicinski } 33402314fe9eSJakub Kicinski 33412314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 33422314fe9eSJakub Kicinski if (err) 33432314fe9eSJakub Kicinski goto err_free_prog; 33442314fe9eSJakub Kicinski 33452314fe9eSJakub Kicinski return prog; 33462314fe9eSJakub Kicinski 33472314fe9eSJakub Kicinski err_free_prog: 33482314fe9eSJakub Kicinski kfree(prog); 33492314fe9eSJakub Kicinski return ERR_PTR(err); 33502314fe9eSJakub Kicinski } 3351