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, 1065468a8b9SJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, bool sync, bool indir) 107d9ae7f2bSJakub Kicinski { 108d9ae7f2bSJakub Kicinski enum cmd_ctx_swap ctx; 109d9ae7f2bSJakub Kicinski u64 insn; 110d9ae7f2bSJakub Kicinski 111d9ae7f2bSJakub Kicinski if (sync) 112d9ae7f2bSJakub Kicinski ctx = CMD_CTX_SWAP; 113d9ae7f2bSJakub Kicinski else 114d9ae7f2bSJakub Kicinski ctx = CMD_CTX_NO_SWAP; 115d9ae7f2bSJakub Kicinski 116d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 117d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 118d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 119d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 120d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 121d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 122d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_SIG, sync) | 123d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 1245468a8b9SJakub Kicinski FIELD_PREP(OP_CMD_INDIR, indir) | 125d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 126d9ae7f2bSJakub Kicinski 127d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 128d9ae7f2bSJakub Kicinski } 129d9ae7f2bSJakub Kicinski 130d9ae7f2bSJakub Kicinski static void 1315468a8b9SJakub Kicinski emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 1325468a8b9SJakub Kicinski swreg lreg, swreg rreg, u8 size, bool sync, bool indir) 133d9ae7f2bSJakub Kicinski { 134d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 135d9ae7f2bSJakub Kicinski int err; 136d9ae7f2bSJakub Kicinski 137d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 138d9ae7f2bSJakub Kicinski if (err) { 139d9ae7f2bSJakub Kicinski nfp_prog->error = err; 140d9ae7f2bSJakub Kicinski return; 141d9ae7f2bSJakub Kicinski } 142d9ae7f2bSJakub Kicinski if (reg.swap) { 143d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 144d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 145d9ae7f2bSJakub Kicinski return; 146d9ae7f2bSJakub Kicinski } 147995e101fSJakub Kicinski if (reg.dst_lmextn || reg.src_lmextn) { 148995e101fSJakub Kicinski pr_err("cmd can't use LMextn\n"); 149995e101fSJakub Kicinski nfp_prog->error = -EFAULT; 150995e101fSJakub Kicinski return; 151995e101fSJakub Kicinski } 152d9ae7f2bSJakub Kicinski 1535468a8b9SJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, sync, 1545468a8b9SJakub Kicinski indir); 1555468a8b9SJakub Kicinski } 1565468a8b9SJakub Kicinski 1575468a8b9SJakub Kicinski static void 1585468a8b9SJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 1595468a8b9SJakub Kicinski swreg lreg, swreg rreg, u8 size, bool sync) 1605468a8b9SJakub Kicinski { 1615468a8b9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, sync, false); 162d9ae7f2bSJakub Kicinski } 163d9ae7f2bSJakub Kicinski 164d9ae7f2bSJakub Kicinski static void 1659879a381SJiong Wang emit_cmd_indir(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 1669879a381SJiong Wang swreg lreg, swreg rreg, u8 size, bool sync) 1679879a381SJiong Wang { 1689879a381SJiong Wang emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, sync, true); 1699879a381SJiong Wang } 1709879a381SJiong Wang 1719879a381SJiong Wang static void 172d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 173d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 174d9ae7f2bSJakub Kicinski { 175d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 176d9ae7f2bSJakub Kicinski u64 insn; 177d9ae7f2bSJakub Kicinski 178d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 179d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 180d9ae7f2bSJakub Kicinski 181d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 182d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 183d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 184d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 185d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 186d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 187d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 188d9ae7f2bSJakub Kicinski 189d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 190d9ae7f2bSJakub Kicinski } 191d9ae7f2bSJakub Kicinski 1922314fe9eSJakub Kicinski static void 1932314fe9eSJakub Kicinski emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, 1942314fe9eSJakub Kicinski enum nfp_relo_type relo) 195d9ae7f2bSJakub Kicinski { 1962314fe9eSJakub Kicinski if (mask == BR_UNC && defer > 2) { 197d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 198d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 199d9ae7f2bSJakub Kicinski return; 200d9ae7f2bSJakub Kicinski } 2012314fe9eSJakub Kicinski 2022314fe9eSJakub Kicinski __emit_br(nfp_prog, mask, 2032314fe9eSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 2042314fe9eSJakub Kicinski BR_CSS_NONE, addr, defer); 2052314fe9eSJakub Kicinski 2062314fe9eSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 2072314fe9eSJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 208d9ae7f2bSJakub Kicinski } 209d9ae7f2bSJakub Kicinski 210d9ae7f2bSJakub Kicinski static void 211d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 212d9ae7f2bSJakub Kicinski { 2132314fe9eSJakub Kicinski emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); 214d9ae7f2bSJakub Kicinski } 215d9ae7f2bSJakub Kicinski 216d9ae7f2bSJakub Kicinski static void 217d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 218d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 219995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 220995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 221d9ae7f2bSJakub Kicinski { 222d9ae7f2bSJakub Kicinski u64 insn; 223d9ae7f2bSJakub Kicinski 224d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 225d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 226d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 227d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 228d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 229d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 230d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 231995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 232995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 233995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 234d9ae7f2bSJakub Kicinski 235d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 236d9ae7f2bSJakub Kicinski } 237d9ae7f2bSJakub Kicinski 238d9ae7f2bSJakub Kicinski static void 239b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 240d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 241d9ae7f2bSJakub Kicinski { 242d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 243d9ae7f2bSJakub Kicinski int err; 244d9ae7f2bSJakub Kicinski 245b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 246d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 247d9ae7f2bSJakub Kicinski return; 248d9ae7f2bSJakub Kicinski } 249d9ae7f2bSJakub Kicinski 250d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 251d9ae7f2bSJakub Kicinski if (err) { 252d9ae7f2bSJakub Kicinski nfp_prog->error = err; 253d9ae7f2bSJakub Kicinski return; 254d9ae7f2bSJakub Kicinski } 255d9ae7f2bSJakub Kicinski 2563239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 2573239e7bbSJiong Wang __emit_immed(nfp_prog, 2583239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 2593239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 2603239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 261d9ae7f2bSJakub Kicinski } 262d9ae7f2bSJakub Kicinski 263d9ae7f2bSJakub Kicinski static void 264d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 265d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 266995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 267995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 268d9ae7f2bSJakub Kicinski { 269d9ae7f2bSJakub Kicinski u64 insn; 270d9ae7f2bSJakub Kicinski 271d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 272d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 273d9ae7f2bSJakub Kicinski return; 274d9ae7f2bSJakub Kicinski } 275d9ae7f2bSJakub Kicinski 276d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 277d9ae7f2bSJakub Kicinski shift = 32 - shift; 278d9ae7f2bSJakub Kicinski 279d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 280d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 281d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 283d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 284d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 285d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 286d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 287d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 288d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 289995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 290995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 291995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 292d9ae7f2bSJakub Kicinski 293d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 294d9ae7f2bSJakub Kicinski } 295d9ae7f2bSJakub Kicinski 296d9ae7f2bSJakub Kicinski static void 297b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 298b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 299d9ae7f2bSJakub Kicinski { 300d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 301d9ae7f2bSJakub Kicinski int err; 302d9ae7f2bSJakub Kicinski 303d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 304d9ae7f2bSJakub Kicinski if (err) { 305d9ae7f2bSJakub Kicinski nfp_prog->error = err; 306d9ae7f2bSJakub Kicinski return; 307d9ae7f2bSJakub Kicinski } 308d9ae7f2bSJakub Kicinski 309d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 310995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 311995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 312d9ae7f2bSJakub Kicinski } 313d9ae7f2bSJakub Kicinski 314d9ae7f2bSJakub Kicinski static void 315d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 316995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 317995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 318d9ae7f2bSJakub Kicinski { 319d9ae7f2bSJakub Kicinski u64 insn; 320d9ae7f2bSJakub Kicinski 321d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 322d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 323d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 324d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 325d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 326d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 327d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 328995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 329995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 330995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 331d9ae7f2bSJakub Kicinski 332d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 333d9ae7f2bSJakub Kicinski } 334d9ae7f2bSJakub Kicinski 335d9ae7f2bSJakub Kicinski static void 336b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 337b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 338d9ae7f2bSJakub Kicinski { 339d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 340d9ae7f2bSJakub Kicinski int err; 341d9ae7f2bSJakub Kicinski 342d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 343d9ae7f2bSJakub Kicinski if (err) { 344d9ae7f2bSJakub Kicinski nfp_prog->error = err; 345d9ae7f2bSJakub Kicinski return; 346d9ae7f2bSJakub Kicinski } 347d9ae7f2bSJakub Kicinski 348d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 349995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 350995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 351d9ae7f2bSJakub Kicinski } 352d9ae7f2bSJakub Kicinski 353d9ae7f2bSJakub Kicinski static void 354d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 355d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 356995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 357995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 358d9ae7f2bSJakub Kicinski { 359d9ae7f2bSJakub Kicinski u64 insn; 360d9ae7f2bSJakub Kicinski 361d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 362d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 363d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 364d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 365d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 366d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 367d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 368d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 369d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 370995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 371995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 372995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 373d9ae7f2bSJakub Kicinski 374d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 375d9ae7f2bSJakub Kicinski } 376d9ae7f2bSJakub Kicinski 377d9ae7f2bSJakub Kicinski static void 378bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 379bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 380d9ae7f2bSJakub Kicinski { 381d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 382d9ae7f2bSJakub Kicinski int err; 383d9ae7f2bSJakub Kicinski 3842de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 3852de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 386d9ae7f2bSJakub Kicinski if (err) { 387d9ae7f2bSJakub Kicinski nfp_prog->error = err; 388d9ae7f2bSJakub Kicinski return; 389d9ae7f2bSJakub Kicinski } 390d9ae7f2bSJakub Kicinski 391d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 392995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 393995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 394d9ae7f2bSJakub Kicinski } 395d9ae7f2bSJakub Kicinski 396d9ae7f2bSJakub Kicinski static void 397b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 398d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 399d9ae7f2bSJakub Kicinski { 400bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 401d9ae7f2bSJakub Kicinski } 402d9ae7f2bSJakub Kicinski 4032df03a50SJakub Kicinski static void 4042df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 4052df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 4062df03a50SJakub Kicinski { 4072df03a50SJakub Kicinski u64 insn; 4082df03a50SJakub Kicinski 4092df03a50SJakub Kicinski insn = OP_LCSR_BASE | 4102df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 4112df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 4122df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 4132df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr) | 4142df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 4152df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 4162df03a50SJakub Kicinski 4172df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 4182df03a50SJakub Kicinski } 4192df03a50SJakub Kicinski 4202df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 4212df03a50SJakub Kicinski { 4222df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 4232df03a50SJakub Kicinski int err; 4242df03a50SJakub Kicinski 4252df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 4262df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 4272df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 4282df03a50SJakub Kicinski * copy the immed to both operands. 4292df03a50SJakub Kicinski */ 4302df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 4312df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 4322df03a50SJakub Kicinski reg.breg = reg.areg; 4332df03a50SJakub Kicinski } else { 4342df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 4352df03a50SJakub Kicinski } 4362df03a50SJakub Kicinski if (err) { 4372df03a50SJakub Kicinski nfp_prog->error = err; 4382df03a50SJakub Kicinski return; 4392df03a50SJakub Kicinski } 4402df03a50SJakub Kicinski 4412df03a50SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr / 4, 4422df03a50SJakub Kicinski false, reg.src_lmextn); 4432df03a50SJakub Kicinski } 4442df03a50SJakub Kicinski 4451c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 4461c03e03fSJakub Kicinski { 4471c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 4481c03e03fSJakub Kicinski } 4491c03e03fSJakub Kicinski 450d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 451d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 452d9ae7f2bSJakub Kicinski { 453d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 454d9ae7f2bSJakub Kicinski *val = imm; 455d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 456d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 457d9ae7f2bSJakub Kicinski *val = imm >> 8; 458d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 459d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 460d9ae7f2bSJakub Kicinski *val = imm >> 16; 461d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 462d9ae7f2bSJakub Kicinski } else { 463d9ae7f2bSJakub Kicinski return false; 464d9ae7f2bSJakub Kicinski } 465d9ae7f2bSJakub Kicinski 466d9ae7f2bSJakub Kicinski return true; 467d9ae7f2bSJakub Kicinski } 468d9ae7f2bSJakub Kicinski 469b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 470d9ae7f2bSJakub Kicinski { 471d9ae7f2bSJakub Kicinski enum immed_shift shift; 472d9ae7f2bSJakub Kicinski u16 val; 473d9ae7f2bSJakub Kicinski 474d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 475d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 476d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 477d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 478d9ae7f2bSJakub Kicinski } else { 479d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 480d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 481d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 482d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 483d9ae7f2bSJakub Kicinski } 484d9ae7f2bSJakub Kicinski } 485d9ae7f2bSJakub Kicinski 486d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 487d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 488d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 489d9ae7f2bSJakub Kicinski */ 490b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 491d9ae7f2bSJakub Kicinski { 492d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 493d9ae7f2bSJakub Kicinski return reg_imm(imm); 494d9ae7f2bSJakub Kicinski 495d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 496d9ae7f2bSJakub Kicinski return tmp_reg; 497d9ae7f2bSJakub Kicinski } 498d9ae7f2bSJakub Kicinski 499d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 500d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 501d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 502d9ae7f2bSJakub Kicinski */ 503b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 504d9ae7f2bSJakub Kicinski { 505d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 506d9ae7f2bSJakub Kicinski return reg_imm(imm); 507d9ae7f2bSJakub Kicinski 508d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 509d9ae7f2bSJakub Kicinski return tmp_reg; 510d9ae7f2bSJakub Kicinski } 511d9ae7f2bSJakub Kicinski 512ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 513ff42bb9fSJakub Kicinski { 514ff42bb9fSJakub Kicinski while (count--) 515ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 516ff42bb9fSJakub Kicinski } 517ff42bb9fSJakub Kicinski 518c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 519c000dfb5SJakub Kicinski { 520c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 521c000dfb5SJakub Kicinski } 522c000dfb5SJakub Kicinski 523d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 524d9ae7f2bSJakub Kicinski { 525c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 526d9ae7f2bSJakub Kicinski } 527d9ae7f2bSJakub Kicinski 5289879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 5299879a381SJiong Wang * result to @dst from low end. 5309879a381SJiong Wang */ 5319879a381SJiong Wang static void 5329879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 5339879a381SJiong Wang u8 offset) 5349879a381SJiong Wang { 5359879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 5369879a381SJiong Wang u8 mask = (1 << field_len) - 1; 5379879a381SJiong Wang 5389879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 5399879a381SJiong Wang } 5409879a381SJiong Wang 5419879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 5429879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 5439879a381SJiong Wang { 5449879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 5459879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 5469879a381SJiong Wang swreg src_base, off; 5479879a381SJiong Wang unsigned int i; 5489879a381SJiong Wang u8 xfer_num; 5499879a381SJiong Wang 5509879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 5519879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 5529879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 5539879a381SJiong Wang 5548c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 5558c900538SJiong Wang if (len > 32) 5568c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 5578c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 5588c900538SJiong Wang 5599879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 5608c900538SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 5618c900538SJiong Wang off, xfer_num - 1, true, len > 32); 5629879a381SJiong Wang 5639879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 5649879a381SJiong Wang for (i = 0; i < xfer_num; i++) 5659879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 5669879a381SJiong Wang 5679879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 5689879a381SJiong Wang 5699879a381SJiong Wang if (len <= 8) { 5709879a381SJiong Wang /* Use single direct_ref write8. */ 5719879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 5729879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 5739879a381SJiong Wang true); 5748c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 5759879a381SJiong Wang /* Use single direct_ref write32. */ 5769879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 5779879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 5789879a381SJiong Wang true); 5798c900538SJiong Wang } else if (len <= 32) { 5809879a381SJiong Wang /* Use single indirect_ref write8. */ 5819879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 5829879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 5839879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 5849879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 5859879a381SJiong Wang len - 1, true); 5868c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 5878c900538SJiong Wang /* Use single indirect_ref write32. */ 5888c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 5898c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 5908c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 5918c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 5928c900538SJiong Wang xfer_num - 1, true); 5938c900538SJiong Wang } else if (len <= 40) { 5948c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 5958c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 5968c900538SJiong Wang */ 5978c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 5988c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 5998c900538SJiong Wang true); 6008c900538SJiong Wang 6018c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 6028c900538SJiong Wang imm_b(nfp_prog)); 6038c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 6048c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 6058c900538SJiong Wang true); 6068c900538SJiong Wang } else { 6078c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 6088c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 6098c900538SJiong Wang */ 6108c900538SJiong Wang u8 new_off; 6118c900538SJiong Wang 6128c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6138c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 6148c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6158c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6168c900538SJiong Wang xfer_num - 2, true); 6178c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 6188c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 6198c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 6208c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 6218c900538SJiong Wang (len & 0x3) - 1, true); 6229879a381SJiong Wang } 6239879a381SJiong Wang 6249879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 6259879a381SJiong Wang * before and after we do memory copy optimization. 6269879a381SJiong Wang * 6279879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 6289879a381SJiong Wang * need to make sure it is loaded with the value the same as before 6299879a381SJiong Wang * this transformation. 6309879a381SJiong Wang * 6319879a381SJiong Wang * These extra loads could be removed once we have accurate register 6329879a381SJiong Wang * usage information. 6339879a381SJiong Wang */ 6349879a381SJiong Wang if (descending_seq) 6359879a381SJiong Wang xfer_num = 0; 6369879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 6379879a381SJiong Wang xfer_num = xfer_num - 1; 6389879a381SJiong Wang else 6399879a381SJiong Wang xfer_num = xfer_num - 2; 6409879a381SJiong Wang 6419879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 6429879a381SJiong Wang case BPF_B: 6439879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6449879a381SJiong Wang reg_xfer(xfer_num), 1, 6459879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 6469879a381SJiong Wang break; 6479879a381SJiong Wang case BPF_H: 6489879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6499879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 6509879a381SJiong Wang break; 6519879a381SJiong Wang case BPF_W: 6529879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6539879a381SJiong Wang reg_xfer(0)); 6549879a381SJiong Wang break; 6559879a381SJiong Wang case BPF_DW: 6569879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6579879a381SJiong Wang reg_xfer(xfer_num)); 6589879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 6599879a381SJiong Wang reg_xfer(xfer_num + 1)); 6609879a381SJiong Wang break; 6619879a381SJiong Wang } 6629879a381SJiong Wang 6639879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 6649879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 6659879a381SJiong Wang 6669879a381SJiong Wang return 0; 6679879a381SJiong Wang } 6689879a381SJiong Wang 669d9ae7f2bSJakub Kicinski static int 6700a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 671d9ae7f2bSJakub Kicinski { 672d9ae7f2bSJakub Kicinski unsigned int i; 673d9ae7f2bSJakub Kicinski u16 shift, sz; 674d9ae7f2bSJakub Kicinski 675d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 676d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 677d9ae7f2bSJakub Kicinski */ 6780a793977SJakub Kicinski sz = max(size, 4); 679d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 680d9ae7f2bSJakub Kicinski 6810a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 6820a793977SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, true); 6830a793977SJakub Kicinski 6840a793977SJakub Kicinski i = 0; 6850a793977SJakub Kicinski if (shift) 6860a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 6870a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 6880a793977SJakub Kicinski else 6890a793977SJakub Kicinski for (; i * 4 < size; i++) 6900a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 6910a793977SJakub Kicinski 6920a793977SJakub Kicinski if (i < 2) 6930a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 6940a793977SJakub Kicinski 6950a793977SJakub Kicinski return 0; 6960a793977SJakub Kicinski } 6970a793977SJakub Kicinski 6980a793977SJakub Kicinski static int 6992ca71441SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7002ca71441SJakub Kicinski u8 dst_gpr, int size) 7012ca71441SJakub Kicinski { 7022ca71441SJakub Kicinski unsigned int i; 7032ca71441SJakub Kicinski u8 mask, sz; 7042ca71441SJakub Kicinski 7052ca71441SJakub Kicinski /* We load the value from the address indicated in @offset and then 7062ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 7072ca71441SJakub Kicinski */ 7082ca71441SJakub Kicinski sz = max(size, 4); 7092ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 7102ca71441SJakub Kicinski 7112ca71441SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, 7122ca71441SJakub Kicinski reg_a(src_gpr), offset, sz / 4 - 1, true); 7132ca71441SJakub Kicinski 7142ca71441SJakub Kicinski i = 0; 7152ca71441SJakub Kicinski if (mask) 7162ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 7172ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 7182ca71441SJakub Kicinski else 7192ca71441SJakub Kicinski for (; i * 4 < size; i++) 7202ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7212ca71441SJakub Kicinski 7222ca71441SJakub Kicinski if (i < 2) 7232ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7242ca71441SJakub Kicinski 7252ca71441SJakub Kicinski return 0; 7262ca71441SJakub Kicinski } 7272ca71441SJakub Kicinski 7282ca71441SJakub Kicinski static int 7290a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 7300a793977SJakub Kicinski { 7310a793977SJakub Kicinski swreg tmp_reg; 7320a793977SJakub Kicinski 733d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 734d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 7350a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 7360a793977SJakub Kicinski 737d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 738d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 739d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 740d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 74118e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 742e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 7430a793977SJakub Kicinski 744d9ae7f2bSJakub Kicinski /* Load data */ 7450a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 746d9ae7f2bSJakub Kicinski } 747d9ae7f2bSJakub Kicinski 748d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 749d9ae7f2bSJakub Kicinski { 7500a793977SJakub Kicinski swreg tmp_reg; 7510a793977SJakub Kicinski 7520a793977SJakub Kicinski /* Check packet length */ 7530a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 7540a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 755e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 7560a793977SJakub Kicinski 7570a793977SJakub Kicinski /* Load data */ 7580a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 7590a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 760d9ae7f2bSJakub Kicinski } 761d9ae7f2bSJakub Kicinski 762e663fe38SJakub Kicinski static int 763e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 764e663fe38SJakub Kicinski u8 src_gpr, u8 size) 765e663fe38SJakub Kicinski { 766e663fe38SJakub Kicinski unsigned int i; 767e663fe38SJakub Kicinski 768e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 769e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 770e663fe38SJakub Kicinski 771e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 772e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 773e663fe38SJakub Kicinski 774e663fe38SJakub Kicinski return 0; 775e663fe38SJakub Kicinski } 776e663fe38SJakub Kicinski 777e663fe38SJakub Kicinski static int 778e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 779e663fe38SJakub Kicinski u64 imm, u8 size) 780e663fe38SJakub Kicinski { 781e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 782e663fe38SJakub Kicinski if (size == 8) 783e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 784e663fe38SJakub Kicinski 785e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 786e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 787e663fe38SJakub Kicinski 788e663fe38SJakub Kicinski return 0; 789e663fe38SJakub Kicinski } 790e663fe38SJakub Kicinski 791ee9133a8SJakub Kicinski typedef int 792ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 7932df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 7942df03a50SJakub Kicinski bool needs_inc); 795a82b23fbSJakub Kicinski 796a82b23fbSJakub Kicinski static int 797a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 7982df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 7992df03a50SJakub Kicinski bool needs_inc) 800a82b23fbSJakub Kicinski { 8012df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 802a82b23fbSJakub Kicinski u32 idx, src_byte; 803a82b23fbSJakub Kicinski enum shf_sc sc; 804a82b23fbSJakub Kicinski swreg reg; 805a82b23fbSJakub Kicinski int shf; 806a82b23fbSJakub Kicinski u8 mask; 807a82b23fbSJakub Kicinski 808a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 809a82b23fbSJakub Kicinski return -EOPNOTSUPP; 810a82b23fbSJakub Kicinski 811a82b23fbSJakub Kicinski idx = off / 4; 812a82b23fbSJakub Kicinski 813a82b23fbSJakub Kicinski /* Move the entire word */ 814a82b23fbSJakub Kicinski if (size == 4) { 8152df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 8162df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 817a82b23fbSJakub Kicinski return 0; 818a82b23fbSJakub Kicinski } 819a82b23fbSJakub Kicinski 8202df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8212df03a50SJakub Kicinski return -EOPNOTSUPP; 8222df03a50SJakub Kicinski 823a82b23fbSJakub Kicinski src_byte = off % 4; 824a82b23fbSJakub Kicinski 825a82b23fbSJakub Kicinski mask = (1 << size) - 1; 826a82b23fbSJakub Kicinski mask <<= dst_byte; 827a82b23fbSJakub Kicinski 828a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 829a82b23fbSJakub Kicinski return -EOPNOTSUPP; 830a82b23fbSJakub Kicinski 831a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 832a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 833a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 834a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 835a82b23fbSJakub Kicinski shf = 32 - shf; 836a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 837a82b23fbSJakub Kicinski } else { 838a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 839a82b23fbSJakub Kicinski } 840a82b23fbSJakub Kicinski 841a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 842a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 843a82b23fbSJakub Kicinski */ 844a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 8452df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 846a82b23fbSJakub Kicinski } else { 847a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 8489a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 8499a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 8509a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 8519a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 8529a90c83cSJakub Kicinski */ 8539a90c83cSJakub Kicinski if (first || !new_gpr) 854a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 855a82b23fbSJakub Kicinski } 856a82b23fbSJakub Kicinski 857a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 858a82b23fbSJakub Kicinski 8592df03a50SJakub Kicinski if (should_inc) 8602df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 8612df03a50SJakub Kicinski 862a82b23fbSJakub Kicinski return 0; 863a82b23fbSJakub Kicinski } 864ee9133a8SJakub Kicinski 865ee9133a8SJakub Kicinski static int 866ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 8672df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8682df03a50SJakub Kicinski bool needs_inc) 869ee9133a8SJakub Kicinski { 8702df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 871ee9133a8SJakub Kicinski u32 idx, dst_byte; 872ee9133a8SJakub Kicinski enum shf_sc sc; 873ee9133a8SJakub Kicinski swreg reg; 874ee9133a8SJakub Kicinski int shf; 875ee9133a8SJakub Kicinski u8 mask; 876ee9133a8SJakub Kicinski 877ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 878ee9133a8SJakub Kicinski return -EOPNOTSUPP; 879ee9133a8SJakub Kicinski 880ee9133a8SJakub Kicinski idx = off / 4; 881ee9133a8SJakub Kicinski 882ee9133a8SJakub Kicinski /* Move the entire word */ 883ee9133a8SJakub Kicinski if (size == 4) { 8842df03a50SJakub Kicinski wrp_mov(nfp_prog, 8852df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 8862df03a50SJakub Kicinski reg_b(src)); 887ee9133a8SJakub Kicinski return 0; 888ee9133a8SJakub Kicinski } 889ee9133a8SJakub Kicinski 8902df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8912df03a50SJakub Kicinski return -EOPNOTSUPP; 8922df03a50SJakub Kicinski 893ee9133a8SJakub Kicinski dst_byte = off % 4; 894ee9133a8SJakub Kicinski 895ee9133a8SJakub Kicinski mask = (1 << size) - 1; 896ee9133a8SJakub Kicinski mask <<= dst_byte; 897ee9133a8SJakub Kicinski 898ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 899ee9133a8SJakub Kicinski return -EOPNOTSUPP; 900ee9133a8SJakub Kicinski 901ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 902ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 903ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 904ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 905ee9133a8SJakub Kicinski shf = 32 - shf; 906ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 907ee9133a8SJakub Kicinski } else { 908ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 909ee9133a8SJakub Kicinski } 910ee9133a8SJakub Kicinski 911ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 912ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 913ee9133a8SJakub Kicinski */ 914ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9152df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 916ee9133a8SJakub Kicinski } else { 917ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 9189a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 9199a90c83cSJakub Kicinski * the middle location will be overwritten fully. 9209a90c83cSJakub Kicinski */ 9219a90c83cSJakub Kicinski if (first || last) 922ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 923ee9133a8SJakub Kicinski } 924ee9133a8SJakub Kicinski 925ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 926ee9133a8SJakub Kicinski 9279a90c83cSJakub Kicinski if (new_gpr || last) { 928ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 929ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 9302df03a50SJakub Kicinski if (should_inc) 9312df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9329a90c83cSJakub Kicinski } 933ee9133a8SJakub Kicinski 934ee9133a8SJakub Kicinski return 0; 935ee9133a8SJakub Kicinski } 936ee9133a8SJakub Kicinski 937ee9133a8SJakub Kicinski static int 938ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 939b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 940b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 941ee9133a8SJakub Kicinski { 942d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 9439a90c83cSJakub Kicinski bool first = true, last; 9442df03a50SJakub Kicinski bool needs_inc = false; 9452df03a50SJakub Kicinski swreg stack_off_reg; 946a82b23fbSJakub Kicinski u8 prev_gpr = 255; 947ee9133a8SJakub Kicinski u32 gpr_byte = 0; 9482df03a50SJakub Kicinski bool lm3 = true; 949ee9133a8SJakub Kicinski int ret; 950ee9133a8SJakub Kicinski 951b14157eeSJakub Kicinski if (meta->ptr_not_const) { 952b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 953b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 954b14157eeSJakub Kicinski * discarded when written to LMaddr register. 955b14157eeSJakub Kicinski */ 956b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 957b14157eeSJakub Kicinski stack_imm(nfp_prog)); 958b14157eeSJakub Kicinski 959b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 960b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 961b14157eeSJakub Kicinski 962b14157eeSJakub Kicinski needs_inc = true; 963b14157eeSJakub Kicinski } else if (off + size <= 64) { 9642df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 9652df03a50SJakub Kicinski lm3 = false; 9662df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 9672df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 9682df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 9692df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 9702df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 9712df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 9722df03a50SJakub Kicinski */ 9732df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 9742df03a50SJakub Kicinski stack_imm(nfp_prog)); 9752df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 9762df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 9772df03a50SJakub Kicinski 9782df03a50SJakub Kicinski off %= 32; 9792df03a50SJakub Kicinski } else { 9802df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 9812df03a50SJakub Kicinski stack_imm(nfp_prog)); 9822df03a50SJakub Kicinski 9832df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 9842df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 9852df03a50SJakub Kicinski 9862df03a50SJakub Kicinski needs_inc = true; 9872df03a50SJakub Kicinski } 9882df03a50SJakub Kicinski if (lm3) { 9892df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 9902df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 9912df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 9922df03a50SJakub Kicinski } 9932df03a50SJakub Kicinski 994a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 995a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 996a82b23fbSJakub Kicinski 997ee9133a8SJakub Kicinski while (size) { 998ee9133a8SJakub Kicinski u32 slice_end; 999ee9133a8SJakub Kicinski u8 slice_size; 1000ee9133a8SJakub Kicinski 1001ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1002ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1003ee9133a8SJakub Kicinski slice_size = slice_end - off; 1004ee9133a8SJakub Kicinski 10059a90c83cSJakub Kicinski last = slice_size == size; 10069a90c83cSJakub Kicinski 10072df03a50SJakub Kicinski if (needs_inc) 10082df03a50SJakub Kicinski off %= 4; 10092df03a50SJakub Kicinski 1010a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 10112df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1012ee9133a8SJakub Kicinski if (ret) 1013ee9133a8SJakub Kicinski return ret; 1014ee9133a8SJakub Kicinski 1015a82b23fbSJakub Kicinski prev_gpr = gpr; 10169a90c83cSJakub Kicinski first = false; 10179a90c83cSJakub Kicinski 1018ee9133a8SJakub Kicinski gpr_byte += slice_size; 1019ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1020ee9133a8SJakub Kicinski gpr_byte -= 4; 1021ee9133a8SJakub Kicinski gpr++; 1022ee9133a8SJakub Kicinski } 1023ee9133a8SJakub Kicinski 1024ee9133a8SJakub Kicinski size -= slice_size; 1025ee9133a8SJakub Kicinski off += slice_size; 1026ee9133a8SJakub Kicinski } 1027ee9133a8SJakub Kicinski 1028ee9133a8SJakub Kicinski return 0; 1029ee9133a8SJakub Kicinski } 1030ee9133a8SJakub Kicinski 1031d9ae7f2bSJakub Kicinski static void 1032d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1033d9ae7f2bSJakub Kicinski { 1034b3f868dfSJakub Kicinski swreg tmp_reg; 1035d9ae7f2bSJakub Kicinski 1036d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1037d9ae7f2bSJakub Kicinski if (!imm) 1038d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1039d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1040d9ae7f2bSJakub Kicinski return; 1041d9ae7f2bSJakub Kicinski } 1042d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1043d9ae7f2bSJakub Kicinski if (!~imm) 1044d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1045d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1046d9ae7f2bSJakub Kicinski return; 1047d9ae7f2bSJakub Kicinski } 1048d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1049d9ae7f2bSJakub Kicinski if (!~imm) 1050d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 10515d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1052d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1053d9ae7f2bSJakub Kicinski return; 1054d9ae7f2bSJakub Kicinski } 1055d9ae7f2bSJakub Kicinski 1056d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1057d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1058d9ae7f2bSJakub Kicinski } 1059d9ae7f2bSJakub Kicinski 1060d9ae7f2bSJakub Kicinski static int 1061d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1062d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1063d9ae7f2bSJakub Kicinski { 1064d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1065d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1066d9ae7f2bSJakub Kicinski 1067d9ae7f2bSJakub Kicinski if (skip) { 1068d9ae7f2bSJakub Kicinski meta->skip = true; 1069d9ae7f2bSJakub Kicinski return 0; 1070d9ae7f2bSJakub Kicinski } 1071d9ae7f2bSJakub Kicinski 1072d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1073d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1074d9ae7f2bSJakub Kicinski 1075d9ae7f2bSJakub Kicinski return 0; 1076d9ae7f2bSJakub Kicinski } 1077d9ae7f2bSJakub Kicinski 1078d9ae7f2bSJakub Kicinski static int 1079d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1080d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1081d9ae7f2bSJakub Kicinski { 1082d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1083d9ae7f2bSJakub Kicinski 1084d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1085d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1086d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1087d9ae7f2bSJakub Kicinski 1088d9ae7f2bSJakub Kicinski return 0; 1089d9ae7f2bSJakub Kicinski } 1090d9ae7f2bSJakub Kicinski 1091d9ae7f2bSJakub Kicinski static int 1092d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1093d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1094d9ae7f2bSJakub Kicinski { 1095d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1096d9ae7f2bSJakub Kicinski 1097d9ae7f2bSJakub Kicinski if (skip) { 1098d9ae7f2bSJakub Kicinski meta->skip = true; 1099d9ae7f2bSJakub Kicinski return 0; 1100d9ae7f2bSJakub Kicinski } 1101d9ae7f2bSJakub Kicinski 1102d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1103d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1104d9ae7f2bSJakub Kicinski 1105d9ae7f2bSJakub Kicinski return 0; 1106d9ae7f2bSJakub Kicinski } 1107d9ae7f2bSJakub Kicinski 1108d9ae7f2bSJakub Kicinski static int 1109d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1110d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1111d9ae7f2bSJakub Kicinski { 1112d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1113d9ae7f2bSJakub Kicinski 1114d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1115d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1116d9ae7f2bSJakub Kicinski 1117d9ae7f2bSJakub Kicinski return 0; 1118d9ae7f2bSJakub Kicinski } 1119d9ae7f2bSJakub Kicinski 1120d9ae7f2bSJakub Kicinski static void 1121d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1122d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1123d9ae7f2bSJakub Kicinski { 1124d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1125d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1126d9ae7f2bSJakub Kicinski } 1127d9ae7f2bSJakub Kicinski 1128d9ae7f2bSJakub Kicinski static int 1129d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1130d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1131d9ae7f2bSJakub Kicinski { 1132d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1133d9ae7f2bSJakub Kicinski 1134d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1135d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1136d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1137d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1138d9ae7f2bSJakub Kicinski 1139d9ae7f2bSJakub Kicinski return 0; 1140d9ae7f2bSJakub Kicinski } 1141d9ae7f2bSJakub Kicinski 1142d9ae7f2bSJakub Kicinski static int 1143d9ae7f2bSJakub Kicinski wrp_cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1144d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1145d9ae7f2bSJakub Kicinski { 1146d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1147d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1148d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1149b3f868dfSJakub Kicinski swreg tmp_reg; 1150d9ae7f2bSJakub Kicinski 1151d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1152d9ae7f2bSJakub Kicinski if (!swap) 1153d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), ALU_OP_SUB, tmp_reg); 1154d9ae7f2bSJakub Kicinski else 1155d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, ALU_OP_SUB, reg_a(reg)); 1156d9ae7f2bSJakub Kicinski 1157d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1158d9ae7f2bSJakub Kicinski if (!swap) 1159d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1160d9ae7f2bSJakub Kicinski reg_a(reg + 1), ALU_OP_SUB_C, tmp_reg); 1161d9ae7f2bSJakub Kicinski else 1162d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1163d9ae7f2bSJakub Kicinski tmp_reg, ALU_OP_SUB_C, reg_a(reg + 1)); 1164d9ae7f2bSJakub Kicinski 1165d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1166d9ae7f2bSJakub Kicinski 1167d9ae7f2bSJakub Kicinski return 0; 1168d9ae7f2bSJakub Kicinski } 1169d9ae7f2bSJakub Kicinski 1170d9ae7f2bSJakub Kicinski static int 1171d9ae7f2bSJakub Kicinski wrp_cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1172d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1173d9ae7f2bSJakub Kicinski { 1174d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 117526fa818dSJakub Kicinski u8 areg, breg; 117626fa818dSJakub Kicinski 117726fa818dSJakub Kicinski areg = insn->dst_reg * 2; 117826fa818dSJakub Kicinski breg = insn->src_reg * 2; 1179d9ae7f2bSJakub Kicinski 1180d9ae7f2bSJakub Kicinski if (swap) { 1181d9ae7f2bSJakub Kicinski areg ^= breg; 1182d9ae7f2bSJakub Kicinski breg ^= areg; 1183d9ae7f2bSJakub Kicinski areg ^= breg; 1184d9ae7f2bSJakub Kicinski } 1185d9ae7f2bSJakub Kicinski 1186d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1187d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1188d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 1189d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1190d9ae7f2bSJakub Kicinski 1191d9ae7f2bSJakub Kicinski return 0; 1192d9ae7f2bSJakub Kicinski } 1193d9ae7f2bSJakub Kicinski 11943119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 11953119d1fdSJakub Kicinski { 11963119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 11973119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 11983119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 11993119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 12003119d1fdSJakub Kicinski } 12013119d1fdSJakub Kicinski 12020d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12030d49eaf4SJakub Kicinski { 12040d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 12050d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 12060d49eaf4SJakub Kicinski u32 ret_einval, end; 12070d49eaf4SJakub Kicinski 12080d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 12090d49eaf4SJakub Kicinski 12108231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 12118231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 12128231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 12138231f844SJakub Kicinski return -EINVAL; 12148231f844SJakub Kicinski 12158231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 12168231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 12178231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12188231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12198231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12208231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12218231f844SJakub Kicinski 12228231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12238231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12248231f844SJakub Kicinski 12258231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 12268231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 12278231f844SJakub Kicinski */ 12288231f844SJakub Kicinski 12298231f844SJakub Kicinski return 0; 12308231f844SJakub Kicinski } 12318231f844SJakub Kicinski 12320d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 12330d49eaf4SJakub Kicinski end = ret_einval + 2; 12340d49eaf4SJakub Kicinski 12350d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 12360d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 12370d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 12380d49eaf4SJakub Kicinski 12390d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 12400d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 12410d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 12420d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 12430d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 12440d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 12450d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 12460d49eaf4SJakub Kicinski 12470d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 12480d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 12490d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12500d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 12510d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 12520d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 12530d49eaf4SJakub Kicinski 12540d49eaf4SJakub Kicinski /* Load the ret code */ 12550d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12560d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12570d49eaf4SJakub Kicinski 12580d49eaf4SJakub Kicinski /* Modify the packet metadata */ 12590d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 12600d49eaf4SJakub Kicinski 12610d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 12622314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 12630d49eaf4SJakub Kicinski 12640d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12650d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12660d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12670d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12680d49eaf4SJakub Kicinski 12690d49eaf4SJakub Kicinski /* return -EINVAL target */ 12700d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 12710d49eaf4SJakub Kicinski return -EINVAL; 12720d49eaf4SJakub Kicinski 12730d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 12740d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 12750d49eaf4SJakub Kicinski 12760d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 12770d49eaf4SJakub Kicinski return -EINVAL; 12780d49eaf4SJakub Kicinski 12790d49eaf4SJakub Kicinski return 0; 12800d49eaf4SJakub Kicinski } 12810d49eaf4SJakub Kicinski 1282d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1283d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1284d9ae7f2bSJakub Kicinski { 1285d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1286b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1287b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1288d9ae7f2bSJakub Kicinski 1289b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1290b14157eeSJakub Kicinski swreg stack_depth_reg; 1291b14157eeSJakub Kicinski 1292b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1293b14157eeSJakub Kicinski nfp_prog->stack_depth, 1294b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1295b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1296b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1297b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1298b14157eeSJakub Kicinski } else { 1299b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1300b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1301b14157eeSJakub Kicinski } 1302d9ae7f2bSJakub Kicinski 1303d9ae7f2bSJakub Kicinski return 0; 1304d9ae7f2bSJakub Kicinski } 1305d9ae7f2bSJakub Kicinski 1306d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1307d9ae7f2bSJakub Kicinski { 1308d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1309d9ae7f2bSJakub Kicinski 1310d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1311d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1312d9ae7f2bSJakub Kicinski 1313d9ae7f2bSJakub Kicinski return 0; 1314d9ae7f2bSJakub Kicinski } 1315d9ae7f2bSJakub Kicinski 1316d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1317d9ae7f2bSJakub Kicinski { 1318d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1319d9ae7f2bSJakub Kicinski } 1320d9ae7f2bSJakub Kicinski 1321d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1322d9ae7f2bSJakub Kicinski { 1323d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1324d9ae7f2bSJakub Kicinski } 1325d9ae7f2bSJakub Kicinski 1326d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1327d9ae7f2bSJakub Kicinski { 1328d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1329d9ae7f2bSJakub Kicinski } 1330d9ae7f2bSJakub Kicinski 1331d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1332d9ae7f2bSJakub Kicinski { 1333d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1334d9ae7f2bSJakub Kicinski } 1335d9ae7f2bSJakub Kicinski 1336d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1337d9ae7f2bSJakub Kicinski { 1338d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1339d9ae7f2bSJakub Kicinski } 1340d9ae7f2bSJakub Kicinski 1341d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1342d9ae7f2bSJakub Kicinski { 1343d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1344d9ae7f2bSJakub Kicinski } 1345d9ae7f2bSJakub Kicinski 1346d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1347d9ae7f2bSJakub Kicinski { 1348d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1349d9ae7f2bSJakub Kicinski 1350d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1351d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1352d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1353d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1354d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1355d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1356d9ae7f2bSJakub Kicinski 1357d9ae7f2bSJakub Kicinski return 0; 1358d9ae7f2bSJakub Kicinski } 1359d9ae7f2bSJakub Kicinski 1360d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1361d9ae7f2bSJakub Kicinski { 1362d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1363d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1364d9ae7f2bSJakub Kicinski 1365d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1366d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1367d9ae7f2bSJakub Kicinski 1368d9ae7f2bSJakub Kicinski return 0; 1369d9ae7f2bSJakub Kicinski } 1370d9ae7f2bSJakub Kicinski 1371d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1372d9ae7f2bSJakub Kicinski { 1373d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1374d9ae7f2bSJakub Kicinski 1375d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1376d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1377d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1378d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1379d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1380d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1381d9ae7f2bSJakub Kicinski 1382d9ae7f2bSJakub Kicinski return 0; 1383d9ae7f2bSJakub Kicinski } 1384d9ae7f2bSJakub Kicinski 1385d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1386d9ae7f2bSJakub Kicinski { 1387d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1388d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1389d9ae7f2bSJakub Kicinski 1390d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1391d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1392d9ae7f2bSJakub Kicinski 1393d9ae7f2bSJakub Kicinski return 0; 1394d9ae7f2bSJakub Kicinski } 1395d9ae7f2bSJakub Kicinski 1396254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1397254ef4d7SJiong Wang { 1398254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1399254ef4d7SJiong Wang 1400254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1401254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1402254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1403254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1404254ef4d7SJiong Wang 1405254ef4d7SJiong Wang return 0; 1406254ef4d7SJiong Wang } 1407254ef4d7SJiong Wang 1408d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1409d9ae7f2bSJakub Kicinski { 1410d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 14113cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1412d9ae7f2bSJakub Kicinski 14133cae1319SJakub Kicinski if (insn->imm < 32) { 14143cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 14153cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 14163cae1319SJakub Kicinski SHF_SC_R_DSHF, 32 - insn->imm); 14173cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 14183cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 14193cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm); 14203cae1319SJakub Kicinski } else if (insn->imm == 32) { 14213cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, dst); 14223cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 14233cae1319SJakub Kicinski } else if (insn->imm > 32) { 14243cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 14253cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 14263cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm - 32); 14273cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 14283cae1319SJakub Kicinski } 1429d9ae7f2bSJakub Kicinski 1430d9ae7f2bSJakub Kicinski return 0; 1431d9ae7f2bSJakub Kicinski } 1432d9ae7f2bSJakub Kicinski 1433d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1434d9ae7f2bSJakub Kicinski { 1435d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 14363cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1437d9ae7f2bSJakub Kicinski 14383cae1319SJakub Kicinski if (insn->imm < 32) { 14393cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 14403cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 14413cae1319SJakub Kicinski SHF_SC_R_DSHF, insn->imm); 14423cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 14433cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 14443cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm); 14453cae1319SJakub Kicinski } else if (insn->imm == 32) { 14463cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst, dst + 1); 14473cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 14483cae1319SJakub Kicinski } else if (insn->imm > 32) { 14493cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 14503cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 14513cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm - 32); 14523cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 14533cae1319SJakub Kicinski } 1454d9ae7f2bSJakub Kicinski 1455d9ae7f2bSJakub Kicinski return 0; 1456d9ae7f2bSJakub Kicinski } 1457d9ae7f2bSJakub Kicinski 1458d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1459d9ae7f2bSJakub Kicinski { 1460d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1461d9ae7f2bSJakub Kicinski 1462d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1463d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1464d9ae7f2bSJakub Kicinski 1465d9ae7f2bSJakub Kicinski return 0; 1466d9ae7f2bSJakub Kicinski } 1467d9ae7f2bSJakub Kicinski 1468d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1469d9ae7f2bSJakub Kicinski { 1470d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1471d9ae7f2bSJakub Kicinski 1472d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1473d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1474d9ae7f2bSJakub Kicinski 1475d9ae7f2bSJakub Kicinski return 0; 1476d9ae7f2bSJakub Kicinski } 1477d9ae7f2bSJakub Kicinski 1478d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1479d9ae7f2bSJakub Kicinski { 1480d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1481d9ae7f2bSJakub Kicinski } 1482d9ae7f2bSJakub Kicinski 1483d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1484d9ae7f2bSJakub Kicinski { 1485d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1486d9ae7f2bSJakub Kicinski } 1487d9ae7f2bSJakub Kicinski 1488d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1489d9ae7f2bSJakub Kicinski { 1490d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1491d9ae7f2bSJakub Kicinski } 1492d9ae7f2bSJakub Kicinski 1493d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1494d9ae7f2bSJakub Kicinski { 1495d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1496d9ae7f2bSJakub Kicinski } 1497d9ae7f2bSJakub Kicinski 1498d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1499d9ae7f2bSJakub Kicinski { 1500d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1501d9ae7f2bSJakub Kicinski } 1502d9ae7f2bSJakub Kicinski 1503d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1504d9ae7f2bSJakub Kicinski { 1505d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1506d9ae7f2bSJakub Kicinski } 1507d9ae7f2bSJakub Kicinski 1508d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1509d9ae7f2bSJakub Kicinski { 1510d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1511d9ae7f2bSJakub Kicinski } 1512d9ae7f2bSJakub Kicinski 1513d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1514d9ae7f2bSJakub Kicinski { 1515d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1516d9ae7f2bSJakub Kicinski } 1517d9ae7f2bSJakub Kicinski 1518d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1519d9ae7f2bSJakub Kicinski { 1520d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1521d9ae7f2bSJakub Kicinski } 1522d9ae7f2bSJakub Kicinski 1523d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1524d9ae7f2bSJakub Kicinski { 1525d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1526d9ae7f2bSJakub Kicinski } 1527d9ae7f2bSJakub Kicinski 1528254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1529254ef4d7SJiong Wang { 1530254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1531254ef4d7SJiong Wang 1532254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1533254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1534254ef4d7SJiong Wang 1535254ef4d7SJiong Wang return 0; 1536254ef4d7SJiong Wang } 1537254ef4d7SJiong Wang 1538d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1539d9ae7f2bSJakub Kicinski { 1540d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1541d9ae7f2bSJakub Kicinski 1542d9ae7f2bSJakub Kicinski if (!insn->imm) 1543d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1544d9ae7f2bSJakub Kicinski 1545d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1546d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1547d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1548d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1549d9ae7f2bSJakub Kicinski 1550d9ae7f2bSJakub Kicinski return 0; 1551d9ae7f2bSJakub Kicinski } 1552d9ae7f2bSJakub Kicinski 15533119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 15543119d1fdSJakub Kicinski { 15553119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15563119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 15573119d1fdSJakub Kicinski 15583119d1fdSJakub Kicinski switch (insn->imm) { 15593119d1fdSJakub Kicinski case 16: 15603119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 15613119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 15623119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 15633119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 15643119d1fdSJakub Kicinski 15653119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 15663119d1fdSJakub Kicinski break; 15673119d1fdSJakub Kicinski case 32: 15683119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 15693119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 15703119d1fdSJakub Kicinski break; 15713119d1fdSJakub Kicinski case 64: 15723119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 15733119d1fdSJakub Kicinski 15743119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 15753119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 15763119d1fdSJakub Kicinski break; 15773119d1fdSJakub Kicinski } 15783119d1fdSJakub Kicinski 15793119d1fdSJakub Kicinski return 0; 15803119d1fdSJakub Kicinski } 15813119d1fdSJakub Kicinski 1582d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1583d9ae7f2bSJakub Kicinski { 15849f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 15859f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 15869f16c8abSJakub Kicinski u8 dst; 15879f16c8abSJakub Kicinski 15889f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 15899f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 15909f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 15919f16c8abSJakub Kicinski 15929f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 15939f16c8abSJakub Kicinski 15949f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 15959f16c8abSJakub Kicinski if (imm_hi == imm_lo) 15969f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 15979f16c8abSJakub Kicinski else 15989f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 1599d9ae7f2bSJakub Kicinski 1600d9ae7f2bSJakub Kicinski return 0; 1601d9ae7f2bSJakub Kicinski } 1602d9ae7f2bSJakub Kicinski 1603d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1604d9ae7f2bSJakub Kicinski { 1605d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1606d9ae7f2bSJakub Kicinski return 0; 1607d9ae7f2bSJakub Kicinski } 1608d9ae7f2bSJakub Kicinski 1609d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1610d9ae7f2bSJakub Kicinski { 1611d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1612d9ae7f2bSJakub Kicinski } 1613d9ae7f2bSJakub Kicinski 1614d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1615d9ae7f2bSJakub Kicinski { 1616d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1617d9ae7f2bSJakub Kicinski } 1618d9ae7f2bSJakub Kicinski 1619d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1620d9ae7f2bSJakub Kicinski { 1621d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1622d9ae7f2bSJakub Kicinski } 1623d9ae7f2bSJakub Kicinski 1624d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1625d9ae7f2bSJakub Kicinski { 1626d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 16270a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 1628d9ae7f2bSJakub Kicinski } 1629d9ae7f2bSJakub Kicinski 1630d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1631d9ae7f2bSJakub Kicinski { 1632d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 16330a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 1634d9ae7f2bSJakub Kicinski } 1635d9ae7f2bSJakub Kicinski 1636d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1637d9ae7f2bSJakub Kicinski { 1638d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 16390a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 1640d9ae7f2bSJakub Kicinski } 1641d9ae7f2bSJakub Kicinski 1642a82b23fbSJakub Kicinski static int 1643a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1644d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1645a82b23fbSJakub Kicinski { 1646d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1647b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 1648b14157eeSJakub Kicinski true, wrp_lmem_load); 1649a82b23fbSJakub Kicinski } 1650a82b23fbSJakub Kicinski 1651943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1652943c57b9SJakub Kicinski u8 size) 1653d9ae7f2bSJakub Kicinski { 1654bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1655bfddbc8aSJakub Kicinski 1656943c57b9SJakub Kicinski switch (meta->insn.off) { 1657c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 1658c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 1659943c57b9SJakub Kicinski return -EOPNOTSUPP; 1660bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 1661bfddbc8aSJakub Kicinski break; 1662c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 1663c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 1664bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1665bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1666bfddbc8aSJakub Kicinski break; 1667c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 1668c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 1669bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1670bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 1671bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1672943c57b9SJakub Kicinski break; 1673943c57b9SJakub Kicinski default: 1674d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1675943c57b9SJakub Kicinski } 1676943c57b9SJakub Kicinski 1677943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1678d9ae7f2bSJakub Kicinski 1679d9ae7f2bSJakub Kicinski return 0; 1680d9ae7f2bSJakub Kicinski } 1681d9ae7f2bSJakub Kicinski 1682943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1683943c57b9SJakub Kicinski u8 size) 1684d9ae7f2bSJakub Kicinski { 1685b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1686d9ae7f2bSJakub Kicinski 1687943c57b9SJakub Kicinski switch (meta->insn.off) { 1688c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 1689c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 1690c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1691c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1692943c57b9SJakub Kicinski break; 1693c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 1694c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 1695c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1696943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 1697943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1698943c57b9SJakub Kicinski break; 1699943c57b9SJakub Kicinski default: 1700943c57b9SJakub Kicinski return -EOPNOTSUPP; 1701943c57b9SJakub Kicinski } 1702d9ae7f2bSJakub Kicinski 1703943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1704d9ae7f2bSJakub Kicinski 1705d9ae7f2bSJakub Kicinski return 0; 1706d9ae7f2bSJakub Kicinski } 1707d9ae7f2bSJakub Kicinski 17082ca71441SJakub Kicinski static int 17092ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 17102ca71441SJakub Kicinski unsigned int size) 17112ca71441SJakub Kicinski { 17122ca71441SJakub Kicinski swreg tmp_reg; 17132ca71441SJakub Kicinski 17142ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 17152ca71441SJakub Kicinski 17162ca71441SJakub Kicinski return data_ld_host_order(nfp_prog, meta->insn.src_reg * 2, tmp_reg, 17172ca71441SJakub Kicinski meta->insn.dst_reg * 2, size); 17182ca71441SJakub Kicinski } 17192ca71441SJakub Kicinski 17202ca71441SJakub Kicinski static int 17212ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 17222ca71441SJakub Kicinski unsigned int size) 17232ca71441SJakub Kicinski { 17249879a381SJiong Wang if (meta->ldst_gather_len) 17259879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 17269879a381SJiong Wang 17272ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 1728012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 17292ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 17302ca71441SJakub Kicinski else 17312ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 17322ca71441SJakub Kicinski } 17332ca71441SJakub Kicinski 17342ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 17352ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 17362ca71441SJakub Kicinski 1737a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 1738d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 1739d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 1740a82b23fbSJakub Kicinski 17412ca71441SJakub Kicinski return -EOPNOTSUPP; 17422ca71441SJakub Kicinski } 17432ca71441SJakub Kicinski 17442ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 17452ca71441SJakub Kicinski { 17462ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 17472ca71441SJakub Kicinski } 17482ca71441SJakub Kicinski 17492ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 17502ca71441SJakub Kicinski { 17512ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 17522ca71441SJakub Kicinski } 17532ca71441SJakub Kicinski 1754d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1755d9ae7f2bSJakub Kicinski { 17562ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 17572ca71441SJakub Kicinski } 17582ca71441SJakub Kicinski 17592ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 17602ca71441SJakub Kicinski { 17612ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 1762d9ae7f2bSJakub Kicinski } 1763d9ae7f2bSJakub Kicinski 1764e663fe38SJakub Kicinski static int 1765e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1766e663fe38SJakub Kicinski unsigned int size) 1767d9ae7f2bSJakub Kicinski { 1768e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1769e663fe38SJakub Kicinski swreg off_reg; 1770e663fe38SJakub Kicinski 1771e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 1772e663fe38SJakub Kicinski 1773e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 1774e663fe38SJakub Kicinski imm, size); 1775e663fe38SJakub Kicinski } 1776e663fe38SJakub Kicinski 1777e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1778e663fe38SJakub Kicinski unsigned int size) 1779e663fe38SJakub Kicinski { 1780e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 1781e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 1782e663fe38SJakub Kicinski 1783d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1784d9ae7f2bSJakub Kicinski } 1785d9ae7f2bSJakub Kicinski 1786e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1787d9ae7f2bSJakub Kicinski { 1788e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 1789e663fe38SJakub Kicinski } 1790e663fe38SJakub Kicinski 1791e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1792e663fe38SJakub Kicinski { 1793e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 1794e663fe38SJakub Kicinski } 1795e663fe38SJakub Kicinski 1796e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1797e663fe38SJakub Kicinski { 1798e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 1799e663fe38SJakub Kicinski } 1800e663fe38SJakub Kicinski 1801e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1802e663fe38SJakub Kicinski { 1803e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 1804e663fe38SJakub Kicinski } 1805e663fe38SJakub Kicinski 1806e663fe38SJakub Kicinski static int 1807e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1808e663fe38SJakub Kicinski unsigned int size) 1809e663fe38SJakub Kicinski { 1810e663fe38SJakub Kicinski swreg off_reg; 1811e663fe38SJakub Kicinski 1812e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 1813e663fe38SJakub Kicinski 1814e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 1815e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 1816e663fe38SJakub Kicinski } 1817e663fe38SJakub Kicinski 1818e663fe38SJakub Kicinski static int 1819ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1820d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1821ee9133a8SJakub Kicinski { 1822d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1823b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 1824b14157eeSJakub Kicinski false, wrp_lmem_store); 1825ee9133a8SJakub Kicinski } 1826ee9133a8SJakub Kicinski 1827ee9133a8SJakub Kicinski static int 1828e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1829e663fe38SJakub Kicinski unsigned int size) 1830e663fe38SJakub Kicinski { 1831e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 1832e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 1833e663fe38SJakub Kicinski 1834ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 1835d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 1836d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 1837ee9133a8SJakub Kicinski 1838d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1839d9ae7f2bSJakub Kicinski } 1840d9ae7f2bSJakub Kicinski 1841e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1842e663fe38SJakub Kicinski { 1843e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 1844e663fe38SJakub Kicinski } 1845e663fe38SJakub Kicinski 1846e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1847e663fe38SJakub Kicinski { 1848e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 1849e663fe38SJakub Kicinski } 1850e663fe38SJakub Kicinski 1851d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1852d9ae7f2bSJakub Kicinski { 1853e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 1854e663fe38SJakub Kicinski } 18552ca71441SJakub Kicinski 1856e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1857e663fe38SJakub Kicinski { 1858e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 1859d9ae7f2bSJakub Kicinski } 1860d9ae7f2bSJakub Kicinski 1861d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1862d9ae7f2bSJakub Kicinski { 1863d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 1864d9ae7f2bSJakub Kicinski 1865d9ae7f2bSJakub Kicinski return 0; 1866d9ae7f2bSJakub Kicinski } 1867d9ae7f2bSJakub Kicinski 1868d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1869d9ae7f2bSJakub Kicinski { 1870d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1871d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1872b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 1873b3f868dfSJakub Kicinski 1874b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 1875b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 1876d9ae7f2bSJakub Kicinski 1877d9ae7f2bSJakub Kicinski if (imm & ~0U) { 1878d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1879d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 1880d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 1881d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 1882d9ae7f2bSJakub Kicinski } 1883d9ae7f2bSJakub Kicinski 1884d9ae7f2bSJakub Kicinski if (imm >> 32) { 1885d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1886d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1887d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 1888d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 1889d9ae7f2bSJakub Kicinski } 1890d9ae7f2bSJakub Kicinski 1891d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 1892d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 1893d9ae7f2bSJakub Kicinski 1894d9ae7f2bSJakub Kicinski return 0; 1895d9ae7f2bSJakub Kicinski } 1896d9ae7f2bSJakub Kicinski 1897d9ae7f2bSJakub Kicinski static int jgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1898d9ae7f2bSJakub Kicinski { 189926fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true); 1900d9ae7f2bSJakub Kicinski } 1901d9ae7f2bSJakub Kicinski 1902d9ae7f2bSJakub Kicinski static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1903d9ae7f2bSJakub Kicinski { 190426fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false); 1905d9ae7f2bSJakub Kicinski } 1906d9ae7f2bSJakub Kicinski 19075dd294d4SDaniel Borkmann static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19085dd294d4SDaniel Borkmann { 190926fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, false); 19105dd294d4SDaniel Borkmann } 19115dd294d4SDaniel Borkmann 19125dd294d4SDaniel Borkmann static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19135dd294d4SDaniel Borkmann { 191426fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); 19155dd294d4SDaniel Borkmann } 19165dd294d4SDaniel Borkmann 1917d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1918d9ae7f2bSJakub Kicinski { 1919d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1920d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1921b3f868dfSJakub Kicinski swreg tmp_reg; 1922d9ae7f2bSJakub Kicinski 1923d9ae7f2bSJakub Kicinski if (!imm) { 1924d9ae7f2bSJakub Kicinski meta->skip = true; 1925d9ae7f2bSJakub Kicinski return 0; 1926d9ae7f2bSJakub Kicinski } 1927d9ae7f2bSJakub Kicinski 1928d9ae7f2bSJakub Kicinski if (imm & ~0U) { 1929d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1930d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1931d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 1932d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 1933d9ae7f2bSJakub Kicinski } 1934d9ae7f2bSJakub Kicinski 1935d9ae7f2bSJakub Kicinski if (imm >> 32) { 1936d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1937d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1938d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 1939d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 1940d9ae7f2bSJakub Kicinski } 1941d9ae7f2bSJakub Kicinski 1942d9ae7f2bSJakub Kicinski return 0; 1943d9ae7f2bSJakub Kicinski } 1944d9ae7f2bSJakub Kicinski 1945d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1946d9ae7f2bSJakub Kicinski { 1947d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1948d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1949b3f868dfSJakub Kicinski swreg tmp_reg; 1950d9ae7f2bSJakub Kicinski 1951d9ae7f2bSJakub Kicinski if (!imm) { 1952d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 1953d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 1954d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 195582837370SJakub Kicinski return 0; 1956d9ae7f2bSJakub Kicinski } 1957d9ae7f2bSJakub Kicinski 1958d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1959d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1960d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 1961d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 1962d9ae7f2bSJakub Kicinski 1963d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1964d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1965d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 1966d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 1967d9ae7f2bSJakub Kicinski 1968d9ae7f2bSJakub Kicinski return 0; 1969d9ae7f2bSJakub Kicinski } 1970d9ae7f2bSJakub Kicinski 1971d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1972d9ae7f2bSJakub Kicinski { 1973d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1974d9ae7f2bSJakub Kicinski 1975d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 1976d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 1977d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 1978d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 1979d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1980d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 1981d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 1982d9ae7f2bSJakub Kicinski 1983d9ae7f2bSJakub Kicinski return 0; 1984d9ae7f2bSJakub Kicinski } 1985d9ae7f2bSJakub Kicinski 1986d9ae7f2bSJakub Kicinski static int jgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1987d9ae7f2bSJakub Kicinski { 198826fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true); 1989d9ae7f2bSJakub Kicinski } 1990d9ae7f2bSJakub Kicinski 1991d9ae7f2bSJakub Kicinski static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1992d9ae7f2bSJakub Kicinski { 199326fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false); 1994d9ae7f2bSJakub Kicinski } 1995d9ae7f2bSJakub Kicinski 19965dd294d4SDaniel Borkmann static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19975dd294d4SDaniel Borkmann { 199826fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, false); 19995dd294d4SDaniel Borkmann } 20005dd294d4SDaniel Borkmann 20015dd294d4SDaniel Borkmann static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20025dd294d4SDaniel Borkmann { 200326fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); 20045dd294d4SDaniel Borkmann } 20055dd294d4SDaniel Borkmann 2006d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2007d9ae7f2bSJakub Kicinski { 2008d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2009d9ae7f2bSJakub Kicinski } 2010d9ae7f2bSJakub Kicinski 2011d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2012d9ae7f2bSJakub Kicinski { 2013d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2014d9ae7f2bSJakub Kicinski } 2015d9ae7f2bSJakub Kicinski 20162cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20172cb230bdSJakub Kicinski { 20182cb230bdSJakub Kicinski switch (meta->insn.imm) { 20190d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 20200d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 20212cb230bdSJakub Kicinski default: 20222cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 20232cb230bdSJakub Kicinski return -EOPNOTSUPP; 20242cb230bdSJakub Kicinski } 20252cb230bdSJakub Kicinski } 20262cb230bdSJakub Kicinski 2027d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2028d9ae7f2bSJakub Kicinski { 2029e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2030d9ae7f2bSJakub Kicinski 2031d9ae7f2bSJakub Kicinski return 0; 2032d9ae7f2bSJakub Kicinski } 2033d9ae7f2bSJakub Kicinski 2034d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2035d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2036d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2037d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2038d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2039d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2040d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2041d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2042d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2043d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2044d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2045d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2046d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2047254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2048d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2049d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2050d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2051d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2052d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2053d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2054d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2055d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2056d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2057d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2058d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2059d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2060d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2061d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2062254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2063d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 20643119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2065d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2066d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2067d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2068d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2069d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2070d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2071d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 20722ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 20732ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2074d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 20752ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2076e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2077e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2078d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2079e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2080e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2081e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2082e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2083e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2084d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2085d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 2086d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = jgt_imm, 2087d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, 20885dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, 20895dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, 2090d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2091d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2092d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 2093d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = jgt_reg, 2094d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, 20955dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, 20965dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, 2097d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2098d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 20992cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2100d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2101d9ae7f2bSJakub Kicinski }; 2102d9ae7f2bSJakub Kicinski 2103d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2104d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2105d9ae7f2bSJakub Kicinski { 21065b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2107854dc87dSJiong Wang u32 idx, br_idx; 2108d9ae7f2bSJakub Kicinski 2109854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2110d9ae7f2bSJakub Kicinski if (meta->skip) 2111d9ae7f2bSJakub Kicinski continue; 21122cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 21132cb230bdSJakub Kicinski continue; 2114d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2115d9ae7f2bSJakub Kicinski continue; 2116d9ae7f2bSJakub Kicinski 21175b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 21182314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 21195b674140SJiong Wang else 21202314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2121854dc87dSJiong Wang 2122d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2123d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2124d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2125d9ae7f2bSJakub Kicinski return -ELOOP; 2126d9ae7f2bSJakub Kicinski } 2127d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 21282314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 21292314fe9eSJakub Kicinski RELO_BR_REL) 2130d9ae7f2bSJakub Kicinski continue; 2131d9ae7f2bSJakub Kicinski 21325b674140SJiong Wang if (!meta->jmp_dst) { 21335b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2134d9ae7f2bSJakub Kicinski return -ELOOP; 2135d9ae7f2bSJakub Kicinski } 2136d9ae7f2bSJakub Kicinski 21375b674140SJiong Wang jmp_dst = meta->jmp_dst; 2138854dc87dSJiong Wang 21395b674140SJiong Wang if (jmp_dst->skip) { 2140d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2141d9ae7f2bSJakub Kicinski return -ELOOP; 2142d9ae7f2bSJakub Kicinski } 2143d9ae7f2bSJakub Kicinski 21442314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2145d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2146d9ae7f2bSJakub Kicinski continue; 21475b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2148d9ae7f2bSJakub Kicinski } 2149d9ae7f2bSJakub Kicinski } 2150d9ae7f2bSJakub Kicinski 2151d9ae7f2bSJakub Kicinski return 0; 2152d9ae7f2bSJakub Kicinski } 2153d9ae7f2bSJakub Kicinski 2154d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2155d9ae7f2bSJakub Kicinski { 215618e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 215718e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 215818e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2159d9ae7f2bSJakub Kicinski } 2160d9ae7f2bSJakub Kicinski 2161d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2162d9ae7f2bSJakub Kicinski { 2163d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2164d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2165d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2166d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2167d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2168d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2169d9ae7f2bSJakub Kicinski * 2170d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2171d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2172d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2173d9ae7f2bSJakub Kicinski * packets up the stack. 2174d9ae7f2bSJakub Kicinski */ 2175d9ae7f2bSJakub Kicinski /* Target for aborts */ 2176d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2177d9ae7f2bSJakub Kicinski 2178e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2179d9ae7f2bSJakub Kicinski 2180c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2181d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2182d9ae7f2bSJakub Kicinski 2183d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2184d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2185d9ae7f2bSJakub Kicinski 2186d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2187d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2188d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2189c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2190d9ae7f2bSJakub Kicinski 2191d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2192d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2193d9ae7f2bSJakub Kicinski 2194d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2195d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2196d9ae7f2bSJakub Kicinski 2197d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2198d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2199d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2200d9ae7f2bSJakub Kicinski 2201d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2202d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2203d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2204d9ae7f2bSJakub Kicinski 2205e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2206d9ae7f2bSJakub Kicinski 2207d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2208d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2209d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2210d9ae7f2bSJakub Kicinski } 2211d9ae7f2bSJakub Kicinski 2212d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2213d9ae7f2bSJakub Kicinski { 2214d9ae7f2bSJakub Kicinski /* XDP return codes: 2215d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2216d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2217d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2218d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2219d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2220d9ae7f2bSJakub Kicinski */ 2221d9ae7f2bSJakub Kicinski /* Target for aborts */ 2222d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2223d9ae7f2bSJakub Kicinski 2224e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2225d9ae7f2bSJakub Kicinski 2226c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2227d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2228d9ae7f2bSJakub Kicinski 2229d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2230d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2231d9ae7f2bSJakub Kicinski 2232d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2233d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2234d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2235d9ae7f2bSJakub Kicinski 2236d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2237d9ae7f2bSJakub Kicinski 2238d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2239d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2240d9ae7f2bSJakub Kicinski 2241d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2242d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2243d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2244d9ae7f2bSJakub Kicinski 2245e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2246d9ae7f2bSJakub Kicinski 2247c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2248d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2249d9ae7f2bSJakub Kicinski } 2250d9ae7f2bSJakub Kicinski 2251d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2252d9ae7f2bSJakub Kicinski { 2253012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2254012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2255d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2256d9ae7f2bSJakub Kicinski break; 2257012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2258d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2259d9ae7f2bSJakub Kicinski break; 2260012bb8a8SJakub Kicinski default: 2261012bb8a8SJakub Kicinski WARN_ON(1); 2262d9ae7f2bSJakub Kicinski } 2263d9ae7f2bSJakub Kicinski } 2264d9ae7f2bSJakub Kicinski 2265d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2266d9ae7f2bSJakub Kicinski { 2267d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2268ff42bb9fSJakub Kicinski int err; 2269d9ae7f2bSJakub Kicinski 2270d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2271d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2272d9ae7f2bSJakub Kicinski return nfp_prog->error; 2273d9ae7f2bSJakub Kicinski 2274d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2275d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2276d9ae7f2bSJakub Kicinski 2277d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2278d9ae7f2bSJakub Kicinski 2279d9ae7f2bSJakub Kicinski if (meta->skip) { 2280d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2281d9ae7f2bSJakub Kicinski continue; 2282d9ae7f2bSJakub Kicinski } 2283d9ae7f2bSJakub Kicinski 2284d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2285d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2286d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2287d9ae7f2bSJakub Kicinski if (!cb) 2288d9ae7f2bSJakub Kicinski return -ENOENT; 2289d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2290d9ae7f2bSJakub Kicinski if (err) 2291d9ae7f2bSJakub Kicinski return err; 2292d9ae7f2bSJakub Kicinski 2293d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2294d9ae7f2bSJakub Kicinski } 2295d9ae7f2bSJakub Kicinski 2296854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 2297854dc87dSJiong Wang 2298d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 2299d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2300d9ae7f2bSJakub Kicinski return nfp_prog->error; 2301d9ae7f2bSJakub Kicinski 2302ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 23031c03e03fSJakub Kicinski if (nfp_prog->error) 23041c03e03fSJakub Kicinski return nfp_prog->error; 23051c03e03fSJakub Kicinski 2306d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 2307d9ae7f2bSJakub Kicinski } 2308d9ae7f2bSJakub Kicinski 2309d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 2310d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 2311d9ae7f2bSJakub Kicinski { 2312d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2313d9ae7f2bSJakub Kicinski 2314d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2315d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 2316d9ae7f2bSJakub Kicinski 2317d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 2318d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 2319d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 2320d9ae7f2bSJakub Kicinski continue; 2321d9ae7f2bSJakub Kicinski 2322d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 2323d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 2324d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 2325d9ae7f2bSJakub Kicinski meta->skip = true; 2326d9ae7f2bSJakub Kicinski 2327d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 2328d9ae7f2bSJakub Kicinski if (!meta->skip) 2329d9ae7f2bSJakub Kicinski return; 2330d9ae7f2bSJakub Kicinski } 2331d9ae7f2bSJakub Kicinski } 2332d9ae7f2bSJakub Kicinski 2333d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 2334d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 2335d9ae7f2bSJakub Kicinski { 2336d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 2337d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 2338d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 2339d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 2340d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 2341d9ae7f2bSJakub Kicinski }; 2342d9ae7f2bSJakub Kicinski 2343d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 2344d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 2345d9ae7f2bSJakub Kicinski 2346d9ae7f2bSJakub Kicinski insn = meta1->insn; 2347d9ae7f2bSJakub Kicinski next = meta2->insn; 2348d9ae7f2bSJakub Kicinski 2349d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2350d9ae7f2bSJakub Kicinski continue; 2351d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2352d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2353d9ae7f2bSJakub Kicinski continue; 2354d9ae7f2bSJakub Kicinski 2355d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 2356d9ae7f2bSJakub Kicinski continue; 2357d9ae7f2bSJakub Kicinski 2358d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 2359d9ae7f2bSJakub Kicinski continue; 2360d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 2361d9ae7f2bSJakub Kicinski continue; 2362d9ae7f2bSJakub Kicinski 2363d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 2364d9ae7f2bSJakub Kicinski continue; 2365d9ae7f2bSJakub Kicinski 23661266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 23671266f5d6SJiong Wang continue; 23681266f5d6SJiong Wang 2369d9ae7f2bSJakub Kicinski meta2->skip = true; 2370d9ae7f2bSJakub Kicinski } 2371d9ae7f2bSJakub Kicinski } 2372d9ae7f2bSJakub Kicinski 2373d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 2374d9ae7f2bSJakub Kicinski { 2375d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 2376d9ae7f2bSJakub Kicinski 2377d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 2378d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 2379d9ae7f2bSJakub Kicinski 2380d9ae7f2bSJakub Kicinski insn = meta1->insn; 2381d9ae7f2bSJakub Kicinski next1 = meta2->insn; 2382d9ae7f2bSJakub Kicinski next2 = meta3->insn; 2383d9ae7f2bSJakub Kicinski 2384d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2385d9ae7f2bSJakub Kicinski continue; 2386d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2387d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2388d9ae7f2bSJakub Kicinski continue; 2389d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 2390d9ae7f2bSJakub Kicinski continue; 2391d9ae7f2bSJakub Kicinski 2392d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 2393d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 2394d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 2395d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 2396d9ae7f2bSJakub Kicinski continue; 2397d9ae7f2bSJakub Kicinski 2398d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 2399d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 2400d9ae7f2bSJakub Kicinski continue; 2401d9ae7f2bSJakub Kicinski 2402d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 2403d9ae7f2bSJakub Kicinski continue; 2404d9ae7f2bSJakub Kicinski 240529fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 240629fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 240729fe46efSJiong Wang continue; 240829fe46efSJiong Wang 2409d9ae7f2bSJakub Kicinski meta2->skip = true; 2410d9ae7f2bSJakub Kicinski meta3->skip = true; 2411d9ae7f2bSJakub Kicinski } 2412d9ae7f2bSJakub Kicinski } 2413d9ae7f2bSJakub Kicinski 24146bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 24156bc7103cSJiong Wang * 24166bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 24176bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 24186bc7103cSJiong Wang * 24196bc7103cSJiong Wang * The destination register of load and source register of store should 24206bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 24216bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 24226bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 24236bc7103cSJiong Wang */ 24246bc7103cSJiong Wang static bool 24256bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 24266bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 24276bc7103cSJiong Wang { 24286bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 24296bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 24306bc7103cSJiong Wang 24316bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 24326bc7103cSJiong Wang return false; 24336bc7103cSJiong Wang 24346bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 24356bc7103cSJiong Wang return false; 24366bc7103cSJiong Wang 24376bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 24386bc7103cSJiong Wang return false; 24396bc7103cSJiong Wang 24406bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 24416bc7103cSJiong Wang return false; 24426bc7103cSJiong Wang 24436bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 24446bc7103cSJiong Wang return false; 24456bc7103cSJiong Wang 24466bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 24476bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 24486bc7103cSJiong Wang return false; 24496bc7103cSJiong Wang 24506bc7103cSJiong Wang return true; 24516bc7103cSJiong Wang } 24526bc7103cSJiong Wang 24536bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 24546bc7103cSJiong Wang * 24556bc7103cSJiong Wang * - Their address base registers are the same. 24566bc7103cSJiong Wang * - Their address offsets are in the same order. 24576bc7103cSJiong Wang * - They operate at the same memory width. 24586bc7103cSJiong Wang * - There is no jump into the middle of them. 24596bc7103cSJiong Wang */ 24606bc7103cSJiong Wang static bool 24616bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 24626bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 24636bc7103cSJiong Wang struct bpf_insn *prev_ld, 24646bc7103cSJiong Wang struct bpf_insn *prev_st) 24656bc7103cSJiong Wang { 24666bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 24676bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 24686bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 24696bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 24706bc7103cSJiong Wang 24716bc7103cSJiong Wang /* This pair is the start pair. */ 24726bc7103cSJiong Wang if (!prev_ld) 24736bc7103cSJiong Wang return true; 24746bc7103cSJiong Wang 24756bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 24766bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 24776bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 24786bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 24796bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 24806bc7103cSJiong Wang prev_ld_off = prev_ld->off; 24816bc7103cSJiong Wang prev_st_off = prev_st->off; 24826bc7103cSJiong Wang 24836bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 24846bc7103cSJiong Wang return false; 24856bc7103cSJiong Wang 24866bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 24876bc7103cSJiong Wang return false; 24886bc7103cSJiong Wang 24896bc7103cSJiong Wang if (curr_size != prev_size) 24906bc7103cSJiong Wang return false; 24916bc7103cSJiong Wang 24926bc7103cSJiong Wang /* There is jump to the head of this pair. */ 24936bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 24946bc7103cSJiong Wang return false; 24956bc7103cSJiong Wang 24966bc7103cSJiong Wang /* Both in ascending order. */ 24976bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 24986bc7103cSJiong Wang prev_st_off + prev_size == st->off) 24996bc7103cSJiong Wang return true; 25006bc7103cSJiong Wang 25016bc7103cSJiong Wang /* Both in descending order. */ 25026bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 25036bc7103cSJiong Wang st->off + curr_size == prev_st_off) 25046bc7103cSJiong Wang return true; 25056bc7103cSJiong Wang 25066bc7103cSJiong Wang return false; 25076bc7103cSJiong Wang } 25086bc7103cSJiong Wang 25096bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 25106bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 25116bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 25126bc7103cSJiong Wang * as an memory copy. 25136bc7103cSJiong Wang */ 25146bc7103cSJiong Wang static bool 25156bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 25166bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 25176bc7103cSJiong Wang { 25186bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 25196bc7103cSJiong Wang 25206bc7103cSJiong Wang /* Different pointer types does not overlap. */ 25216bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 25226bc7103cSJiong Wang return false; 25236bc7103cSJiong Wang 25246bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 25256bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 25266bc7103cSJiong Wang return true; 25276bc7103cSJiong Wang 25286bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 25296bc7103cSJiong Wang * base register. 25306bc7103cSJiong Wang */ 25316bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 25326bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 25336bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 25346bc7103cSJiong Wang 25356bc7103cSJiong Wang /* Ascending order cross. */ 25366bc7103cSJiong Wang if (ld_off > head_ld_off && 25376bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 25386bc7103cSJiong Wang return true; 25396bc7103cSJiong Wang 25406bc7103cSJiong Wang /* Descending order cross. */ 25416bc7103cSJiong Wang if (ld_off < head_ld_off && 25426bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 25436bc7103cSJiong Wang return true; 25446bc7103cSJiong Wang 25456bc7103cSJiong Wang return false; 25466bc7103cSJiong Wang } 25476bc7103cSJiong Wang 25486bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 25496bc7103cSJiong Wang * 25506bc7103cSJiong Wang * load R, [regA + offA] 25516bc7103cSJiong Wang * store [regB + offB], R 25526bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 25536bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 25546bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 25556bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 25566bc7103cSJiong Wang * ... 25576bc7103cSJiong Wang * 25586bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 25596bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 25606bc7103cSJiong Wang */ 25616bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 25626bc7103cSJiong Wang { 25636bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 25646bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 25656bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 25666bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 25676bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 25686bc7103cSJiong Wang u8 count = 0; 25696bc7103cSJiong Wang 25706bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 25716bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 25726bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 25736bc7103cSJiong Wang 25746bc7103cSJiong Wang /* Reset record status if any of the following if true: 25756bc7103cSJiong Wang * - The current insn pair is not load/store. 25766bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 25776bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 25786bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 25796bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 25806bc7103cSJiong Wang * single NFP CPP command can transfer. 25816bc7103cSJiong Wang */ 25826bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 25836bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 25846bc7103cSJiong Wang prev_st) || 25856bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 25866bc7103cSJiong Wang head_st_meta) || 25876bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 25886bc7103cSJiong Wang if (!count) 25896bc7103cSJiong Wang continue; 25906bc7103cSJiong Wang 25916bc7103cSJiong Wang if (count > 1) { 25926bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 25936bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 25946bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 25956bc7103cSJiong Wang 25966bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 25976bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 25986bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 25996bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 26006bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 26016bc7103cSJiong Wang } 26026bc7103cSJiong Wang 26036bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 26046bc7103cSJiong Wang head_st_meta->skip = true; 26056bc7103cSJiong Wang } else { 26066bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 26076bc7103cSJiong Wang } 26086bc7103cSJiong Wang 26096bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 26106bc7103cSJiong Wang * could serve as the new head of the the next chain. 26116bc7103cSJiong Wang */ 26126bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 26136bc7103cSJiong Wang head_ld_meta = meta1; 26146bc7103cSJiong Wang head_st_meta = meta2; 26156bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 26166bc7103cSJiong Wang BPF_LDST_BYTES(ld); 26176bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 26186bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 26196bc7103cSJiong Wang prev_ld = ld; 26206bc7103cSJiong Wang prev_st = st; 26216bc7103cSJiong Wang count = 1; 26226bc7103cSJiong Wang } else { 26236bc7103cSJiong Wang head_ld_meta = NULL; 26246bc7103cSJiong Wang head_st_meta = NULL; 26256bc7103cSJiong Wang prev_ld = NULL; 26266bc7103cSJiong Wang prev_st = NULL; 26276bc7103cSJiong Wang count = 0; 26286bc7103cSJiong Wang } 26296bc7103cSJiong Wang 26306bc7103cSJiong Wang continue; 26316bc7103cSJiong Wang } 26326bc7103cSJiong Wang 26336bc7103cSJiong Wang if (!head_ld_meta) { 26346bc7103cSJiong Wang head_ld_meta = meta1; 26356bc7103cSJiong Wang head_st_meta = meta2; 26366bc7103cSJiong Wang } else { 26376bc7103cSJiong Wang meta1->skip = true; 26386bc7103cSJiong Wang meta2->skip = true; 26396bc7103cSJiong Wang } 26406bc7103cSJiong Wang 26416bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 26426bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 26436bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 26446bc7103cSJiong Wang prev_ld = ld; 26456bc7103cSJiong Wang prev_st = st; 26466bc7103cSJiong Wang count++; 26476bc7103cSJiong Wang } 26486bc7103cSJiong Wang } 26496bc7103cSJiong Wang 2650d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 2651d9ae7f2bSJakub Kicinski { 2652d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 2653d9ae7f2bSJakub Kicinski 2654d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 2655d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 26566bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 2657d9ae7f2bSJakub Kicinski 2658d9ae7f2bSJakub Kicinski return 0; 2659d9ae7f2bSJakub Kicinski } 2660d9ae7f2bSJakub Kicinski 26612314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 2662fd068ddcSJakub Kicinski { 26632314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 2664fd068ddcSJakub Kicinski int i; 2665fd068ddcSJakub Kicinski 26662314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 2667fd068ddcSJakub Kicinski int err; 2668fd068ddcSJakub Kicinski 26692314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 2670fd068ddcSJakub Kicinski if (err) 2671fd068ddcSJakub Kicinski return err; 2672fd068ddcSJakub Kicinski 26732314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 2674fd068ddcSJakub Kicinski } 2675fd068ddcSJakub Kicinski 2676fd068ddcSJakub Kicinski return 0; 2677fd068ddcSJakub Kicinski } 2678fd068ddcSJakub Kicinski 267944a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 268044a12eccSJakub Kicinski { 268144a12eccSJakub Kicinski void *prog; 268244a12eccSJakub Kicinski 268344a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 268444a12eccSJakub Kicinski if (!prog) 268544a12eccSJakub Kicinski return; 268644a12eccSJakub Kicinski 268744a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 268844a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 268944a12eccSJakub Kicinski kvfree(nfp_prog->prog); 269044a12eccSJakub Kicinski nfp_prog->prog = prog; 269144a12eccSJakub Kicinski } 269244a12eccSJakub Kicinski 2693c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 2694d9ae7f2bSJakub Kicinski { 2695d9ae7f2bSJakub Kicinski int ret; 2696d9ae7f2bSJakub Kicinski 2697d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 2698d9ae7f2bSJakub Kicinski if (ret) 26999314c442SJakub Kicinski return ret; 2700d9ae7f2bSJakub Kicinski 2701d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 2702d9ae7f2bSJakub Kicinski if (ret) { 2703d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 2704d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 27059314c442SJakub Kicinski return -EINVAL; 2706d9ae7f2bSJakub Kicinski } 2707d9ae7f2bSJakub Kicinski 270844a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 270944a12eccSJakub Kicinski 27102314fe9eSJakub Kicinski return ret; 2711d9ae7f2bSJakub Kicinski } 27121549921dSJakub Kicinski 27131549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 27141549921dSJakub Kicinski { 27151549921dSJakub Kicinski struct nfp_insn_meta *meta; 27161549921dSJakub Kicinski 27171549921dSJakub Kicinski /* Another pass to record jump information. */ 27181549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 27191549921dSJakub Kicinski u64 code = meta->insn.code; 27201549921dSJakub Kicinski 27211549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 27221549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 27231549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 27241549921dSJakub Kicinski unsigned short dst_indx; 27251549921dSJakub Kicinski 27261549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 27271549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 27281549921dSJakub Kicinski cnt); 27291549921dSJakub Kicinski 27301549921dSJakub Kicinski meta->jmp_dst = dst_meta; 27311549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 27321549921dSJakub Kicinski } 27331549921dSJakub Kicinski } 27341549921dSJakub Kicinski } 27352314fe9eSJakub Kicinski 27362314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 27372314fe9eSJakub Kicinski { 27382314fe9eSJakub Kicinski unsigned int i; 27392314fe9eSJakub Kicinski u64 *prog; 27402314fe9eSJakub Kicinski int err; 27412314fe9eSJakub Kicinski 27422314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 27432314fe9eSJakub Kicinski GFP_KERNEL); 27442314fe9eSJakub Kicinski if (!prog) 27452314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 27462314fe9eSJakub Kicinski 27472314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 27482314fe9eSJakub Kicinski enum nfp_relo_type special; 27492314fe9eSJakub Kicinski 27502314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 27512314fe9eSJakub Kicinski switch (special) { 27522314fe9eSJakub Kicinski case RELO_NONE: 27532314fe9eSJakub Kicinski continue; 27542314fe9eSJakub Kicinski case RELO_BR_REL: 27552314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 27562314fe9eSJakub Kicinski break; 27572314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 27582314fe9eSJakub Kicinski br_set_offset(&prog[i], 27592314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 27602314fe9eSJakub Kicinski break; 27612314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 27622314fe9eSJakub Kicinski br_set_offset(&prog[i], 27632314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 27642314fe9eSJakub Kicinski break; 27652314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 27662314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 27672314fe9eSJakub Kicinski break; 27682314fe9eSJakub Kicinski } 27692314fe9eSJakub Kicinski 27702314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 27712314fe9eSJakub Kicinski } 27722314fe9eSJakub Kicinski 27732314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 27742314fe9eSJakub Kicinski if (err) 27752314fe9eSJakub Kicinski goto err_free_prog; 27762314fe9eSJakub Kicinski 27772314fe9eSJakub Kicinski return prog; 27782314fe9eSJakub Kicinski 27792314fe9eSJakub Kicinski err_free_prog: 27802314fe9eSJakub Kicinski kfree(prog); 27812314fe9eSJakub Kicinski return ERR_PTR(err); 27822314fe9eSJakub Kicinski } 2783