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 48677a3d311SJakub Kicinski static void 48777a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 48877a3d311SJakub Kicinski enum nfp_relo_type relo) 48977a3d311SJakub Kicinski { 49077a3d311SJakub Kicinski if (imm > 0xffff) { 49177a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 49277a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 49377a3d311SJakub Kicinski return; 49477a3d311SJakub Kicinski } 49577a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 49677a3d311SJakub Kicinski 49777a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 49877a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 49977a3d311SJakub Kicinski } 50077a3d311SJakub Kicinski 501d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 502d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 503d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 504d9ae7f2bSJakub Kicinski */ 505b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 506d9ae7f2bSJakub Kicinski { 507d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 508d9ae7f2bSJakub Kicinski return reg_imm(imm); 509d9ae7f2bSJakub Kicinski 510d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 511d9ae7f2bSJakub Kicinski return tmp_reg; 512d9ae7f2bSJakub Kicinski } 513d9ae7f2bSJakub Kicinski 514d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 515d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 516d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 517d9ae7f2bSJakub Kicinski */ 518b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 519d9ae7f2bSJakub Kicinski { 520d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 521d9ae7f2bSJakub Kicinski return reg_imm(imm); 522d9ae7f2bSJakub Kicinski 523d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 524d9ae7f2bSJakub Kicinski return tmp_reg; 525d9ae7f2bSJakub Kicinski } 526d9ae7f2bSJakub Kicinski 527ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 528ff42bb9fSJakub Kicinski { 529ff42bb9fSJakub Kicinski while (count--) 530ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 531ff42bb9fSJakub Kicinski } 532ff42bb9fSJakub Kicinski 533c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 534c000dfb5SJakub Kicinski { 535c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 536c000dfb5SJakub Kicinski } 537c000dfb5SJakub Kicinski 538d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 539d9ae7f2bSJakub Kicinski { 540c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 541d9ae7f2bSJakub Kicinski } 542d9ae7f2bSJakub Kicinski 5439879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 5449879a381SJiong Wang * result to @dst from low end. 5459879a381SJiong Wang */ 5469879a381SJiong Wang static void 5479879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 5489879a381SJiong Wang u8 offset) 5499879a381SJiong Wang { 5509879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 5519879a381SJiong Wang u8 mask = (1 << field_len) - 1; 5529879a381SJiong Wang 5539879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 5549879a381SJiong Wang } 5559879a381SJiong Wang 5569879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 5579879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 5589879a381SJiong Wang { 5599879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 5609879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 5619879a381SJiong Wang swreg src_base, off; 5629879a381SJiong Wang unsigned int i; 5639879a381SJiong Wang u8 xfer_num; 5649879a381SJiong Wang 5659879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 5669879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 5679879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 5689879a381SJiong Wang 5698c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 5708c900538SJiong Wang if (len > 32) 5718c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 5728c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 5738c900538SJiong Wang 5749879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 5758c900538SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 5768c900538SJiong Wang off, xfer_num - 1, true, len > 32); 5779879a381SJiong Wang 5789879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 5799879a381SJiong Wang for (i = 0; i < xfer_num; i++) 5809879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 5819879a381SJiong Wang 5829879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 5839879a381SJiong Wang 5849879a381SJiong Wang if (len <= 8) { 5859879a381SJiong Wang /* Use single direct_ref write8. */ 5869879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 5879879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 5889879a381SJiong Wang true); 5898c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 5909879a381SJiong Wang /* Use single direct_ref write32. */ 5919879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 5929879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 5939879a381SJiong Wang true); 5948c900538SJiong Wang } else if (len <= 32) { 5959879a381SJiong Wang /* Use single indirect_ref write8. */ 5969879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 5979879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 5989879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 5999879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6009879a381SJiong Wang len - 1, true); 6018c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 6028c900538SJiong Wang /* Use single indirect_ref write32. */ 6038c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6048c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6058c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6068c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6078c900538SJiong Wang xfer_num - 1, true); 6088c900538SJiong Wang } else if (len <= 40) { 6098c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 6108c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 6118c900538SJiong Wang */ 6128c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6138c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 6148c900538SJiong Wang true); 6158c900538SJiong Wang 6168c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 6178c900538SJiong Wang imm_b(nfp_prog)); 6188c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 6198c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 6208c900538SJiong Wang true); 6218c900538SJiong Wang } else { 6228c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 6238c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 6248c900538SJiong Wang */ 6258c900538SJiong Wang u8 new_off; 6268c900538SJiong Wang 6278c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6288c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 6298c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6308c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6318c900538SJiong Wang xfer_num - 2, true); 6328c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 6338c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 6348c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 6358c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 6368c900538SJiong Wang (len & 0x3) - 1, true); 6379879a381SJiong Wang } 6389879a381SJiong Wang 6399879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 6409879a381SJiong Wang * before and after we do memory copy optimization. 6419879a381SJiong Wang * 6429879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 6439879a381SJiong Wang * need to make sure it is loaded with the value the same as before 6449879a381SJiong Wang * this transformation. 6459879a381SJiong Wang * 6469879a381SJiong Wang * These extra loads could be removed once we have accurate register 6479879a381SJiong Wang * usage information. 6489879a381SJiong Wang */ 6499879a381SJiong Wang if (descending_seq) 6509879a381SJiong Wang xfer_num = 0; 6519879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 6529879a381SJiong Wang xfer_num = xfer_num - 1; 6539879a381SJiong Wang else 6549879a381SJiong Wang xfer_num = xfer_num - 2; 6559879a381SJiong Wang 6569879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 6579879a381SJiong Wang case BPF_B: 6589879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6599879a381SJiong Wang reg_xfer(xfer_num), 1, 6609879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 6619879a381SJiong Wang break; 6629879a381SJiong Wang case BPF_H: 6639879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6649879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 6659879a381SJiong Wang break; 6669879a381SJiong Wang case BPF_W: 6679879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6689879a381SJiong Wang reg_xfer(0)); 6699879a381SJiong Wang break; 6709879a381SJiong Wang case BPF_DW: 6719879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6729879a381SJiong Wang reg_xfer(xfer_num)); 6739879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 6749879a381SJiong Wang reg_xfer(xfer_num + 1)); 6759879a381SJiong Wang break; 6769879a381SJiong Wang } 6779879a381SJiong Wang 6789879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 6799879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 6809879a381SJiong Wang 6819879a381SJiong Wang return 0; 6829879a381SJiong Wang } 6839879a381SJiong Wang 684d9ae7f2bSJakub Kicinski static int 6850a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 686d9ae7f2bSJakub Kicinski { 687d9ae7f2bSJakub Kicinski unsigned int i; 688d9ae7f2bSJakub Kicinski u16 shift, sz; 689d9ae7f2bSJakub Kicinski 690d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 691d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 692d9ae7f2bSJakub Kicinski */ 6930a793977SJakub Kicinski sz = max(size, 4); 694d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 695d9ae7f2bSJakub Kicinski 6960a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 6970a793977SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, true); 6980a793977SJakub Kicinski 6990a793977SJakub Kicinski i = 0; 7000a793977SJakub Kicinski if (shift) 7010a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 7020a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 7030a793977SJakub Kicinski else 7040a793977SJakub Kicinski for (; i * 4 < size; i++) 7050a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7060a793977SJakub Kicinski 7070a793977SJakub Kicinski if (i < 2) 7080a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7090a793977SJakub Kicinski 7100a793977SJakub Kicinski return 0; 7110a793977SJakub Kicinski } 7120a793977SJakub Kicinski 7130a793977SJakub Kicinski static int 7142ca71441SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7152ca71441SJakub Kicinski u8 dst_gpr, int size) 7162ca71441SJakub Kicinski { 7172ca71441SJakub Kicinski unsigned int i; 7182ca71441SJakub Kicinski u8 mask, sz; 7192ca71441SJakub Kicinski 7202ca71441SJakub Kicinski /* We load the value from the address indicated in @offset and then 7212ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 7222ca71441SJakub Kicinski */ 7232ca71441SJakub Kicinski sz = max(size, 4); 7242ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 7252ca71441SJakub Kicinski 7262ca71441SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, 7272ca71441SJakub Kicinski reg_a(src_gpr), offset, sz / 4 - 1, true); 7282ca71441SJakub Kicinski 7292ca71441SJakub Kicinski i = 0; 7302ca71441SJakub Kicinski if (mask) 7312ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 7322ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 7332ca71441SJakub Kicinski else 7342ca71441SJakub Kicinski for (; i * 4 < size; i++) 7352ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7362ca71441SJakub Kicinski 7372ca71441SJakub Kicinski if (i < 2) 7382ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7392ca71441SJakub Kicinski 7402ca71441SJakub Kicinski return 0; 7412ca71441SJakub Kicinski } 7422ca71441SJakub Kicinski 7432ca71441SJakub Kicinski static int 7440a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 7450a793977SJakub Kicinski { 7460a793977SJakub Kicinski swreg tmp_reg; 7470a793977SJakub Kicinski 748d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 749d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 7500a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 7510a793977SJakub Kicinski 752d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 753d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 754d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 755d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 75618e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 757e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 7580a793977SJakub Kicinski 759d9ae7f2bSJakub Kicinski /* Load data */ 7600a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 761d9ae7f2bSJakub Kicinski } 762d9ae7f2bSJakub Kicinski 763d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 764d9ae7f2bSJakub Kicinski { 7650a793977SJakub Kicinski swreg tmp_reg; 7660a793977SJakub Kicinski 7670a793977SJakub Kicinski /* Check packet length */ 7680a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 7690a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 770e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 7710a793977SJakub Kicinski 7720a793977SJakub Kicinski /* Load data */ 7730a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 7740a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 775d9ae7f2bSJakub Kicinski } 776d9ae7f2bSJakub Kicinski 777e663fe38SJakub Kicinski static int 778e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 779e663fe38SJakub Kicinski u8 src_gpr, u8 size) 780e663fe38SJakub Kicinski { 781e663fe38SJakub Kicinski unsigned int i; 782e663fe38SJakub Kicinski 783e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 784e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 785e663fe38SJakub Kicinski 786e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 787e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 788e663fe38SJakub Kicinski 789e663fe38SJakub Kicinski return 0; 790e663fe38SJakub Kicinski } 791e663fe38SJakub Kicinski 792e663fe38SJakub Kicinski static int 793e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 794e663fe38SJakub Kicinski u64 imm, u8 size) 795e663fe38SJakub Kicinski { 796e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 797e663fe38SJakub Kicinski if (size == 8) 798e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 799e663fe38SJakub Kicinski 800e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 801e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 802e663fe38SJakub Kicinski 803e663fe38SJakub Kicinski return 0; 804e663fe38SJakub Kicinski } 805e663fe38SJakub Kicinski 806ee9133a8SJakub Kicinski typedef int 807ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 8082df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8092df03a50SJakub Kicinski bool needs_inc); 810a82b23fbSJakub Kicinski 811a82b23fbSJakub Kicinski static int 812a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 8132df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8142df03a50SJakub Kicinski bool needs_inc) 815a82b23fbSJakub Kicinski { 8162df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 817a82b23fbSJakub Kicinski u32 idx, src_byte; 818a82b23fbSJakub Kicinski enum shf_sc sc; 819a82b23fbSJakub Kicinski swreg reg; 820a82b23fbSJakub Kicinski int shf; 821a82b23fbSJakub Kicinski u8 mask; 822a82b23fbSJakub Kicinski 823a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 824a82b23fbSJakub Kicinski return -EOPNOTSUPP; 825a82b23fbSJakub Kicinski 826a82b23fbSJakub Kicinski idx = off / 4; 827a82b23fbSJakub Kicinski 828a82b23fbSJakub Kicinski /* Move the entire word */ 829a82b23fbSJakub Kicinski if (size == 4) { 8302df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 8312df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 832a82b23fbSJakub Kicinski return 0; 833a82b23fbSJakub Kicinski } 834a82b23fbSJakub Kicinski 8352df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8362df03a50SJakub Kicinski return -EOPNOTSUPP; 8372df03a50SJakub Kicinski 838a82b23fbSJakub Kicinski src_byte = off % 4; 839a82b23fbSJakub Kicinski 840a82b23fbSJakub Kicinski mask = (1 << size) - 1; 841a82b23fbSJakub Kicinski mask <<= dst_byte; 842a82b23fbSJakub Kicinski 843a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 844a82b23fbSJakub Kicinski return -EOPNOTSUPP; 845a82b23fbSJakub Kicinski 846a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 847a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 848a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 849a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 850a82b23fbSJakub Kicinski shf = 32 - shf; 851a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 852a82b23fbSJakub Kicinski } else { 853a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 854a82b23fbSJakub Kicinski } 855a82b23fbSJakub Kicinski 856a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 857a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 858a82b23fbSJakub Kicinski */ 859a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 8602df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 861a82b23fbSJakub Kicinski } else { 862a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 8639a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 8649a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 8659a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 8669a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 8679a90c83cSJakub Kicinski */ 8689a90c83cSJakub Kicinski if (first || !new_gpr) 869a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 870a82b23fbSJakub Kicinski } 871a82b23fbSJakub Kicinski 872a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 873a82b23fbSJakub Kicinski 8742df03a50SJakub Kicinski if (should_inc) 8752df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 8762df03a50SJakub Kicinski 877a82b23fbSJakub Kicinski return 0; 878a82b23fbSJakub Kicinski } 879ee9133a8SJakub Kicinski 880ee9133a8SJakub Kicinski static int 881ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 8822df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8832df03a50SJakub Kicinski bool needs_inc) 884ee9133a8SJakub Kicinski { 8852df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 886ee9133a8SJakub Kicinski u32 idx, dst_byte; 887ee9133a8SJakub Kicinski enum shf_sc sc; 888ee9133a8SJakub Kicinski swreg reg; 889ee9133a8SJakub Kicinski int shf; 890ee9133a8SJakub Kicinski u8 mask; 891ee9133a8SJakub Kicinski 892ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 893ee9133a8SJakub Kicinski return -EOPNOTSUPP; 894ee9133a8SJakub Kicinski 895ee9133a8SJakub Kicinski idx = off / 4; 896ee9133a8SJakub Kicinski 897ee9133a8SJakub Kicinski /* Move the entire word */ 898ee9133a8SJakub Kicinski if (size == 4) { 8992df03a50SJakub Kicinski wrp_mov(nfp_prog, 9002df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 9012df03a50SJakub Kicinski reg_b(src)); 902ee9133a8SJakub Kicinski return 0; 903ee9133a8SJakub Kicinski } 904ee9133a8SJakub Kicinski 9052df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9062df03a50SJakub Kicinski return -EOPNOTSUPP; 9072df03a50SJakub Kicinski 908ee9133a8SJakub Kicinski dst_byte = off % 4; 909ee9133a8SJakub Kicinski 910ee9133a8SJakub Kicinski mask = (1 << size) - 1; 911ee9133a8SJakub Kicinski mask <<= dst_byte; 912ee9133a8SJakub Kicinski 913ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 914ee9133a8SJakub Kicinski return -EOPNOTSUPP; 915ee9133a8SJakub Kicinski 916ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 917ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 918ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 919ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 920ee9133a8SJakub Kicinski shf = 32 - shf; 921ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 922ee9133a8SJakub Kicinski } else { 923ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 924ee9133a8SJakub Kicinski } 925ee9133a8SJakub Kicinski 926ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 927ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 928ee9133a8SJakub Kicinski */ 929ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9302df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 931ee9133a8SJakub Kicinski } else { 932ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 9339a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 9349a90c83cSJakub Kicinski * the middle location will be overwritten fully. 9359a90c83cSJakub Kicinski */ 9369a90c83cSJakub Kicinski if (first || last) 937ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 938ee9133a8SJakub Kicinski } 939ee9133a8SJakub Kicinski 940ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 941ee9133a8SJakub Kicinski 9429a90c83cSJakub Kicinski if (new_gpr || last) { 943ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 944ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 9452df03a50SJakub Kicinski if (should_inc) 9462df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9479a90c83cSJakub Kicinski } 948ee9133a8SJakub Kicinski 949ee9133a8SJakub Kicinski return 0; 950ee9133a8SJakub Kicinski } 951ee9133a8SJakub Kicinski 952ee9133a8SJakub Kicinski static int 953ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 954b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 955b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 956ee9133a8SJakub Kicinski { 957d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 9589a90c83cSJakub Kicinski bool first = true, last; 9592df03a50SJakub Kicinski bool needs_inc = false; 9602df03a50SJakub Kicinski swreg stack_off_reg; 961a82b23fbSJakub Kicinski u8 prev_gpr = 255; 962ee9133a8SJakub Kicinski u32 gpr_byte = 0; 9632df03a50SJakub Kicinski bool lm3 = true; 964ee9133a8SJakub Kicinski int ret; 965ee9133a8SJakub Kicinski 966b14157eeSJakub Kicinski if (meta->ptr_not_const) { 967b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 968b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 969b14157eeSJakub Kicinski * discarded when written to LMaddr register. 970b14157eeSJakub Kicinski */ 971b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 972b14157eeSJakub Kicinski stack_imm(nfp_prog)); 973b14157eeSJakub Kicinski 974b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 975b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 976b14157eeSJakub Kicinski 977b14157eeSJakub Kicinski needs_inc = true; 978b14157eeSJakub Kicinski } else if (off + size <= 64) { 9792df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 9802df03a50SJakub Kicinski lm3 = false; 9812df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 9822df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 9832df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 9842df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 9852df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 9862df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 9872df03a50SJakub Kicinski */ 9882df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 9892df03a50SJakub Kicinski stack_imm(nfp_prog)); 9902df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 9912df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 9922df03a50SJakub Kicinski 9932df03a50SJakub Kicinski off %= 32; 9942df03a50SJakub Kicinski } else { 9952df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 9962df03a50SJakub Kicinski stack_imm(nfp_prog)); 9972df03a50SJakub Kicinski 9982df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 9992df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10002df03a50SJakub Kicinski 10012df03a50SJakub Kicinski needs_inc = true; 10022df03a50SJakub Kicinski } 10032df03a50SJakub Kicinski if (lm3) { 10042df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 10052df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 10062df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 10072df03a50SJakub Kicinski } 10082df03a50SJakub Kicinski 1009a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1010a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1011a82b23fbSJakub Kicinski 1012ee9133a8SJakub Kicinski while (size) { 1013ee9133a8SJakub Kicinski u32 slice_end; 1014ee9133a8SJakub Kicinski u8 slice_size; 1015ee9133a8SJakub Kicinski 1016ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1017ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1018ee9133a8SJakub Kicinski slice_size = slice_end - off; 1019ee9133a8SJakub Kicinski 10209a90c83cSJakub Kicinski last = slice_size == size; 10219a90c83cSJakub Kicinski 10222df03a50SJakub Kicinski if (needs_inc) 10232df03a50SJakub Kicinski off %= 4; 10242df03a50SJakub Kicinski 1025a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 10262df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1027ee9133a8SJakub Kicinski if (ret) 1028ee9133a8SJakub Kicinski return ret; 1029ee9133a8SJakub Kicinski 1030a82b23fbSJakub Kicinski prev_gpr = gpr; 10319a90c83cSJakub Kicinski first = false; 10329a90c83cSJakub Kicinski 1033ee9133a8SJakub Kicinski gpr_byte += slice_size; 1034ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1035ee9133a8SJakub Kicinski gpr_byte -= 4; 1036ee9133a8SJakub Kicinski gpr++; 1037ee9133a8SJakub Kicinski } 1038ee9133a8SJakub Kicinski 1039ee9133a8SJakub Kicinski size -= slice_size; 1040ee9133a8SJakub Kicinski off += slice_size; 1041ee9133a8SJakub Kicinski } 1042ee9133a8SJakub Kicinski 1043ee9133a8SJakub Kicinski return 0; 1044ee9133a8SJakub Kicinski } 1045ee9133a8SJakub Kicinski 1046d9ae7f2bSJakub Kicinski static void 1047d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1048d9ae7f2bSJakub Kicinski { 1049b3f868dfSJakub Kicinski swreg tmp_reg; 1050d9ae7f2bSJakub Kicinski 1051d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1052d9ae7f2bSJakub Kicinski if (!imm) 1053d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1054d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1055d9ae7f2bSJakub Kicinski return; 1056d9ae7f2bSJakub Kicinski } 1057d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1058d9ae7f2bSJakub Kicinski if (!~imm) 1059d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1060d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1061d9ae7f2bSJakub Kicinski return; 1062d9ae7f2bSJakub Kicinski } 1063d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1064d9ae7f2bSJakub Kicinski if (!~imm) 1065d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 10665d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1067d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1068d9ae7f2bSJakub Kicinski return; 1069d9ae7f2bSJakub Kicinski } 1070d9ae7f2bSJakub Kicinski 1071d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1072d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1073d9ae7f2bSJakub Kicinski } 1074d9ae7f2bSJakub Kicinski 1075d9ae7f2bSJakub Kicinski static int 1076d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1077d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1078d9ae7f2bSJakub Kicinski { 1079d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1080d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1081d9ae7f2bSJakub Kicinski 1082d9ae7f2bSJakub Kicinski if (skip) { 1083d9ae7f2bSJakub Kicinski meta->skip = true; 1084d9ae7f2bSJakub Kicinski return 0; 1085d9ae7f2bSJakub Kicinski } 1086d9ae7f2bSJakub Kicinski 1087d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1088d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1089d9ae7f2bSJakub Kicinski 1090d9ae7f2bSJakub Kicinski return 0; 1091d9ae7f2bSJakub Kicinski } 1092d9ae7f2bSJakub Kicinski 1093d9ae7f2bSJakub Kicinski static int 1094d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1095d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1096d9ae7f2bSJakub Kicinski { 1097d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1098d9ae7f2bSJakub Kicinski 1099d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1100d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1101d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1102d9ae7f2bSJakub Kicinski 1103d9ae7f2bSJakub Kicinski return 0; 1104d9ae7f2bSJakub Kicinski } 1105d9ae7f2bSJakub Kicinski 1106d9ae7f2bSJakub Kicinski static int 1107d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1108d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1109d9ae7f2bSJakub Kicinski { 1110d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1111d9ae7f2bSJakub Kicinski 1112d9ae7f2bSJakub Kicinski if (skip) { 1113d9ae7f2bSJakub Kicinski meta->skip = true; 1114d9ae7f2bSJakub Kicinski return 0; 1115d9ae7f2bSJakub Kicinski } 1116d9ae7f2bSJakub Kicinski 1117d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1118d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1119d9ae7f2bSJakub Kicinski 1120d9ae7f2bSJakub Kicinski return 0; 1121d9ae7f2bSJakub Kicinski } 1122d9ae7f2bSJakub Kicinski 1123d9ae7f2bSJakub Kicinski static int 1124d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1125d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1126d9ae7f2bSJakub Kicinski { 1127d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1128d9ae7f2bSJakub Kicinski 1129d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1130d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1131d9ae7f2bSJakub Kicinski 1132d9ae7f2bSJakub Kicinski return 0; 1133d9ae7f2bSJakub Kicinski } 1134d9ae7f2bSJakub Kicinski 1135d9ae7f2bSJakub Kicinski static void 1136d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1137d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1138d9ae7f2bSJakub Kicinski { 1139d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1140d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1141d9ae7f2bSJakub Kicinski } 1142d9ae7f2bSJakub Kicinski 1143d9ae7f2bSJakub Kicinski static int 1144d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1145d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1146d9ae7f2bSJakub Kicinski { 1147d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1148d9ae7f2bSJakub Kicinski 1149d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1150d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1151d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1152d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1153d9ae7f2bSJakub Kicinski 1154d9ae7f2bSJakub Kicinski return 0; 1155d9ae7f2bSJakub Kicinski } 1156d9ae7f2bSJakub Kicinski 1157d9ae7f2bSJakub Kicinski static int 1158d9ae7f2bSJakub Kicinski wrp_cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1159d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1160d9ae7f2bSJakub Kicinski { 1161d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1162d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1163d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1164b3f868dfSJakub Kicinski swreg tmp_reg; 1165d9ae7f2bSJakub Kicinski 1166d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1167d9ae7f2bSJakub Kicinski if (!swap) 1168d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), ALU_OP_SUB, tmp_reg); 1169d9ae7f2bSJakub Kicinski else 1170d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, ALU_OP_SUB, reg_a(reg)); 1171d9ae7f2bSJakub Kicinski 1172d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1173d9ae7f2bSJakub Kicinski if (!swap) 1174d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1175d9ae7f2bSJakub Kicinski reg_a(reg + 1), ALU_OP_SUB_C, tmp_reg); 1176d9ae7f2bSJakub Kicinski else 1177d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1178d9ae7f2bSJakub Kicinski tmp_reg, ALU_OP_SUB_C, reg_a(reg + 1)); 1179d9ae7f2bSJakub Kicinski 1180d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1181d9ae7f2bSJakub Kicinski 1182d9ae7f2bSJakub Kicinski return 0; 1183d9ae7f2bSJakub Kicinski } 1184d9ae7f2bSJakub Kicinski 1185d9ae7f2bSJakub Kicinski static int 1186d9ae7f2bSJakub Kicinski wrp_cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1187d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1188d9ae7f2bSJakub Kicinski { 1189d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 119026fa818dSJakub Kicinski u8 areg, breg; 119126fa818dSJakub Kicinski 119226fa818dSJakub Kicinski areg = insn->dst_reg * 2; 119326fa818dSJakub Kicinski breg = insn->src_reg * 2; 1194d9ae7f2bSJakub Kicinski 1195d9ae7f2bSJakub Kicinski if (swap) { 1196d9ae7f2bSJakub Kicinski areg ^= breg; 1197d9ae7f2bSJakub Kicinski breg ^= areg; 1198d9ae7f2bSJakub Kicinski areg ^= breg; 1199d9ae7f2bSJakub Kicinski } 1200d9ae7f2bSJakub Kicinski 1201d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1202d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1203d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 1204d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1205d9ae7f2bSJakub Kicinski 1206d9ae7f2bSJakub Kicinski return 0; 1207d9ae7f2bSJakub Kicinski } 1208d9ae7f2bSJakub Kicinski 12093119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 12103119d1fdSJakub Kicinski { 12113119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 12123119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 12133119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 12143119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 12153119d1fdSJakub Kicinski } 12163119d1fdSJakub Kicinski 12170d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12180d49eaf4SJakub Kicinski { 12190d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 12200d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 12210d49eaf4SJakub Kicinski u32 ret_einval, end; 12220d49eaf4SJakub Kicinski 12230d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 12240d49eaf4SJakub Kicinski 12258231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 12268231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 12278231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 12288231f844SJakub Kicinski return -EINVAL; 12298231f844SJakub Kicinski 12308231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 12318231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 12328231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12338231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12348231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12358231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12368231f844SJakub Kicinski 12378231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12388231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12398231f844SJakub Kicinski 12408231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 12418231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 12428231f844SJakub Kicinski */ 12438231f844SJakub Kicinski 12448231f844SJakub Kicinski return 0; 12458231f844SJakub Kicinski } 12468231f844SJakub Kicinski 12470d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 12480d49eaf4SJakub Kicinski end = ret_einval + 2; 12490d49eaf4SJakub Kicinski 12500d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 12510d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 12520d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 12530d49eaf4SJakub Kicinski 12540d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 12550d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 12560d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 12570d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 12580d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 12590d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 12600d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 12610d49eaf4SJakub Kicinski 12620d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 12630d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 12640d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12650d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 12660d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 12670d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 12680d49eaf4SJakub Kicinski 12690d49eaf4SJakub Kicinski /* Load the ret code */ 12700d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12710d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12720d49eaf4SJakub Kicinski 12730d49eaf4SJakub Kicinski /* Modify the packet metadata */ 12740d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 12750d49eaf4SJakub Kicinski 12760d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 12772314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 12780d49eaf4SJakub Kicinski 12790d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12800d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12810d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12820d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12830d49eaf4SJakub Kicinski 12840d49eaf4SJakub Kicinski /* return -EINVAL target */ 12850d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 12860d49eaf4SJakub Kicinski return -EINVAL; 12870d49eaf4SJakub Kicinski 12880d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 12890d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 12900d49eaf4SJakub Kicinski 12910d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 12920d49eaf4SJakub Kicinski return -EINVAL; 12930d49eaf4SJakub Kicinski 12940d49eaf4SJakub Kicinski return 0; 12950d49eaf4SJakub Kicinski } 12960d49eaf4SJakub Kicinski 129777a3d311SJakub Kicinski static int 129877a3d311SJakub Kicinski map_lookup_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 129977a3d311SJakub Kicinski { 130077a3d311SJakub Kicinski struct bpf_offloaded_map *offmap; 130177a3d311SJakub Kicinski struct nfp_bpf_map *nfp_map; 130277a3d311SJakub Kicinski bool load_lm_ptr; 130377a3d311SJakub Kicinski u32 ret_tgt; 130477a3d311SJakub Kicinski s64 lm_off; 130577a3d311SJakub Kicinski swreg tid; 130677a3d311SJakub Kicinski 130777a3d311SJakub Kicinski offmap = (struct bpf_offloaded_map *)meta->arg1.map_ptr; 130877a3d311SJakub Kicinski nfp_map = offmap->dev_priv; 130977a3d311SJakub Kicinski 131077a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 131177a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 131277a3d311SJakub Kicinski lm_off += meta->arg2.var_off.value + meta->arg2.off; 131377a3d311SJakub Kicinski load_lm_ptr = meta->arg2_var_off || lm_off; 131477a3d311SJakub Kicinski 131577a3d311SJakub Kicinski /* Set LM0 to start of key */ 131677a3d311SJakub Kicinski if (load_lm_ptr) 131777a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 131877a3d311SJakub Kicinski 131977a3d311SJakub Kicinski /* Load map ID into a register, it should actually fit as an immediate 132077a3d311SJakub Kicinski * but in case it doesn't deal with it here, not in the delay slots. 132177a3d311SJakub Kicinski */ 132277a3d311SJakub Kicinski tid = ur_load_imm_any(nfp_prog, nfp_map->tid, imm_a(nfp_prog)); 132377a3d311SJakub Kicinski 132477a3d311SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + BPF_FUNC_map_lookup_elem, 132577a3d311SJakub Kicinski 2, RELO_BR_HELPER); 132677a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 132777a3d311SJakub Kicinski 132877a3d311SJakub Kicinski /* Load map ID into A0 */ 132977a3d311SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), tid); 133077a3d311SJakub Kicinski 133177a3d311SJakub Kicinski /* Load the return address into B0 */ 133277a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 133377a3d311SJakub Kicinski 133477a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 133577a3d311SJakub Kicinski return -EINVAL; 133677a3d311SJakub Kicinski 133777a3d311SJakub Kicinski /* Reset the LM0 pointer */ 133877a3d311SJakub Kicinski if (!load_lm_ptr) 133977a3d311SJakub Kicinski return 0; 134077a3d311SJakub Kicinski 134177a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 134277a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 134377a3d311SJakub Kicinski 134477a3d311SJakub Kicinski return 0; 134577a3d311SJakub Kicinski } 134677a3d311SJakub Kicinski 1347d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1348d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1349d9ae7f2bSJakub Kicinski { 1350d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1351b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1352b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1353d9ae7f2bSJakub Kicinski 1354b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1355b14157eeSJakub Kicinski swreg stack_depth_reg; 1356b14157eeSJakub Kicinski 1357b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1358b14157eeSJakub Kicinski nfp_prog->stack_depth, 1359b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1360b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1361b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1362b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1363b14157eeSJakub Kicinski } else { 1364b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1365b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1366b14157eeSJakub Kicinski } 1367d9ae7f2bSJakub Kicinski 1368d9ae7f2bSJakub Kicinski return 0; 1369d9ae7f2bSJakub Kicinski } 1370d9ae7f2bSJakub Kicinski 1371d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1372d9ae7f2bSJakub Kicinski { 1373d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1374d9ae7f2bSJakub Kicinski 1375d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1376d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1377d9ae7f2bSJakub Kicinski 1378d9ae7f2bSJakub Kicinski return 0; 1379d9ae7f2bSJakub Kicinski } 1380d9ae7f2bSJakub Kicinski 1381d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1382d9ae7f2bSJakub Kicinski { 1383d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1384d9ae7f2bSJakub Kicinski } 1385d9ae7f2bSJakub Kicinski 1386d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1387d9ae7f2bSJakub Kicinski { 1388d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1389d9ae7f2bSJakub Kicinski } 1390d9ae7f2bSJakub Kicinski 1391d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1392d9ae7f2bSJakub Kicinski { 1393d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1394d9ae7f2bSJakub Kicinski } 1395d9ae7f2bSJakub Kicinski 1396d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1397d9ae7f2bSJakub Kicinski { 1398d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1399d9ae7f2bSJakub Kicinski } 1400d9ae7f2bSJakub Kicinski 1401d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1402d9ae7f2bSJakub Kicinski { 1403d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1404d9ae7f2bSJakub Kicinski } 1405d9ae7f2bSJakub Kicinski 1406d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1407d9ae7f2bSJakub Kicinski { 1408d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1409d9ae7f2bSJakub Kicinski } 1410d9ae7f2bSJakub Kicinski 1411d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1412d9ae7f2bSJakub Kicinski { 1413d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1414d9ae7f2bSJakub Kicinski 1415d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1416d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1417d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1418d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1419d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1420d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1421d9ae7f2bSJakub Kicinski 1422d9ae7f2bSJakub Kicinski return 0; 1423d9ae7f2bSJakub Kicinski } 1424d9ae7f2bSJakub Kicinski 1425d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1426d9ae7f2bSJakub Kicinski { 1427d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1428d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1429d9ae7f2bSJakub Kicinski 1430d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1431d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1432d9ae7f2bSJakub Kicinski 1433d9ae7f2bSJakub Kicinski return 0; 1434d9ae7f2bSJakub Kicinski } 1435d9ae7f2bSJakub Kicinski 1436d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1437d9ae7f2bSJakub Kicinski { 1438d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1439d9ae7f2bSJakub Kicinski 1440d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1441d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1442d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1443d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1444d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1445d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1446d9ae7f2bSJakub Kicinski 1447d9ae7f2bSJakub Kicinski return 0; 1448d9ae7f2bSJakub Kicinski } 1449d9ae7f2bSJakub Kicinski 1450d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1451d9ae7f2bSJakub Kicinski { 1452d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1453d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1454d9ae7f2bSJakub Kicinski 1455d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1456d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1457d9ae7f2bSJakub Kicinski 1458d9ae7f2bSJakub Kicinski return 0; 1459d9ae7f2bSJakub Kicinski } 1460d9ae7f2bSJakub Kicinski 1461254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1462254ef4d7SJiong Wang { 1463254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1464254ef4d7SJiong Wang 1465254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1466254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1467254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1468254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1469254ef4d7SJiong Wang 1470254ef4d7SJiong Wang return 0; 1471254ef4d7SJiong Wang } 1472254ef4d7SJiong Wang 1473d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1474d9ae7f2bSJakub Kicinski { 1475d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 14763cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1477d9ae7f2bSJakub Kicinski 14783cae1319SJakub Kicinski if (insn->imm < 32) { 14793cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 14803cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 14813cae1319SJakub Kicinski SHF_SC_R_DSHF, 32 - insn->imm); 14823cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 14833cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 14843cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm); 14853cae1319SJakub Kicinski } else if (insn->imm == 32) { 14863cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, dst); 14873cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 14883cae1319SJakub Kicinski } else if (insn->imm > 32) { 14893cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 14903cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 14913cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm - 32); 14923cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 14933cae1319SJakub Kicinski } 1494d9ae7f2bSJakub Kicinski 1495d9ae7f2bSJakub Kicinski return 0; 1496d9ae7f2bSJakub Kicinski } 1497d9ae7f2bSJakub Kicinski 1498d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1499d9ae7f2bSJakub Kicinski { 1500d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15013cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1502d9ae7f2bSJakub Kicinski 15033cae1319SJakub Kicinski if (insn->imm < 32) { 15043cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15053cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15063cae1319SJakub Kicinski SHF_SC_R_DSHF, insn->imm); 15073cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15083cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15093cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm); 15103cae1319SJakub Kicinski } else if (insn->imm == 32) { 15113cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst, dst + 1); 15123cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15133cae1319SJakub Kicinski } else if (insn->imm > 32) { 15143cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15153cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15163cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm - 32); 15173cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15183cae1319SJakub Kicinski } 1519d9ae7f2bSJakub Kicinski 1520d9ae7f2bSJakub Kicinski return 0; 1521d9ae7f2bSJakub Kicinski } 1522d9ae7f2bSJakub Kicinski 1523d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1524d9ae7f2bSJakub Kicinski { 1525d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1526d9ae7f2bSJakub Kicinski 1527d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1528d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1529d9ae7f2bSJakub Kicinski 1530d9ae7f2bSJakub Kicinski return 0; 1531d9ae7f2bSJakub Kicinski } 1532d9ae7f2bSJakub Kicinski 1533d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1534d9ae7f2bSJakub Kicinski { 1535d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1536d9ae7f2bSJakub Kicinski 1537d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1538d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1539d9ae7f2bSJakub Kicinski 1540d9ae7f2bSJakub Kicinski return 0; 1541d9ae7f2bSJakub Kicinski } 1542d9ae7f2bSJakub Kicinski 1543d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1544d9ae7f2bSJakub Kicinski { 1545d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1546d9ae7f2bSJakub Kicinski } 1547d9ae7f2bSJakub Kicinski 1548d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1549d9ae7f2bSJakub Kicinski { 1550d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1551d9ae7f2bSJakub Kicinski } 1552d9ae7f2bSJakub Kicinski 1553d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1554d9ae7f2bSJakub Kicinski { 1555d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1556d9ae7f2bSJakub Kicinski } 1557d9ae7f2bSJakub Kicinski 1558d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1559d9ae7f2bSJakub Kicinski { 1560d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1561d9ae7f2bSJakub Kicinski } 1562d9ae7f2bSJakub Kicinski 1563d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1564d9ae7f2bSJakub Kicinski { 1565d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1566d9ae7f2bSJakub Kicinski } 1567d9ae7f2bSJakub Kicinski 1568d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1569d9ae7f2bSJakub Kicinski { 1570d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1571d9ae7f2bSJakub Kicinski } 1572d9ae7f2bSJakub Kicinski 1573d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1574d9ae7f2bSJakub Kicinski { 1575d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1576d9ae7f2bSJakub Kicinski } 1577d9ae7f2bSJakub Kicinski 1578d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1579d9ae7f2bSJakub Kicinski { 1580d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1581d9ae7f2bSJakub Kicinski } 1582d9ae7f2bSJakub Kicinski 1583d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1584d9ae7f2bSJakub Kicinski { 1585d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1586d9ae7f2bSJakub Kicinski } 1587d9ae7f2bSJakub Kicinski 1588d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1589d9ae7f2bSJakub Kicinski { 1590d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1591d9ae7f2bSJakub Kicinski } 1592d9ae7f2bSJakub Kicinski 1593254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1594254ef4d7SJiong Wang { 1595254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1596254ef4d7SJiong Wang 1597254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1598254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1599254ef4d7SJiong Wang 1600254ef4d7SJiong Wang return 0; 1601254ef4d7SJiong Wang } 1602254ef4d7SJiong Wang 1603d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1604d9ae7f2bSJakub Kicinski { 1605d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1606d9ae7f2bSJakub Kicinski 1607d9ae7f2bSJakub Kicinski if (!insn->imm) 1608d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1609d9ae7f2bSJakub Kicinski 1610d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1611d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1612d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1613d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1614d9ae7f2bSJakub Kicinski 1615d9ae7f2bSJakub Kicinski return 0; 1616d9ae7f2bSJakub Kicinski } 1617d9ae7f2bSJakub Kicinski 16183119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16193119d1fdSJakub Kicinski { 16203119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 16213119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 16223119d1fdSJakub Kicinski 16233119d1fdSJakub Kicinski switch (insn->imm) { 16243119d1fdSJakub Kicinski case 16: 16253119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 16263119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 16273119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 16283119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 16293119d1fdSJakub Kicinski 16303119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16313119d1fdSJakub Kicinski break; 16323119d1fdSJakub Kicinski case 32: 16333119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 16343119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16353119d1fdSJakub Kicinski break; 16363119d1fdSJakub Kicinski case 64: 16373119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 16383119d1fdSJakub Kicinski 16393119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 16403119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 16413119d1fdSJakub Kicinski break; 16423119d1fdSJakub Kicinski } 16433119d1fdSJakub Kicinski 16443119d1fdSJakub Kicinski return 0; 16453119d1fdSJakub Kicinski } 16463119d1fdSJakub Kicinski 1647d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1648d9ae7f2bSJakub Kicinski { 16499f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 16509f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 16519f16c8abSJakub Kicinski u8 dst; 16529f16c8abSJakub Kicinski 16539f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 16549f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 16559f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 16569f16c8abSJakub Kicinski 16579f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 16589f16c8abSJakub Kicinski 16599f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 16609f16c8abSJakub Kicinski if (imm_hi == imm_lo) 16619f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 16629f16c8abSJakub Kicinski else 16639f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 1664d9ae7f2bSJakub Kicinski 1665d9ae7f2bSJakub Kicinski return 0; 1666d9ae7f2bSJakub Kicinski } 1667d9ae7f2bSJakub Kicinski 1668d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1669d9ae7f2bSJakub Kicinski { 1670d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1671d9ae7f2bSJakub Kicinski return 0; 1672d9ae7f2bSJakub Kicinski } 1673d9ae7f2bSJakub Kicinski 1674d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1675d9ae7f2bSJakub Kicinski { 1676d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1677d9ae7f2bSJakub Kicinski } 1678d9ae7f2bSJakub Kicinski 1679d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1680d9ae7f2bSJakub Kicinski { 1681d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1682d9ae7f2bSJakub Kicinski } 1683d9ae7f2bSJakub Kicinski 1684d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1685d9ae7f2bSJakub Kicinski { 1686d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1687d9ae7f2bSJakub Kicinski } 1688d9ae7f2bSJakub Kicinski 1689d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1690d9ae7f2bSJakub Kicinski { 1691d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 16920a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 1693d9ae7f2bSJakub Kicinski } 1694d9ae7f2bSJakub Kicinski 1695d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1696d9ae7f2bSJakub Kicinski { 1697d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 16980a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 1699d9ae7f2bSJakub Kicinski } 1700d9ae7f2bSJakub Kicinski 1701d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1702d9ae7f2bSJakub Kicinski { 1703d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17040a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 1705d9ae7f2bSJakub Kicinski } 1706d9ae7f2bSJakub Kicinski 1707a82b23fbSJakub Kicinski static int 1708a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1709d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1710a82b23fbSJakub Kicinski { 1711d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1712b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 1713b14157eeSJakub Kicinski true, wrp_lmem_load); 1714a82b23fbSJakub Kicinski } 1715a82b23fbSJakub Kicinski 1716943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1717943c57b9SJakub Kicinski u8 size) 1718d9ae7f2bSJakub Kicinski { 1719bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1720bfddbc8aSJakub Kicinski 1721943c57b9SJakub Kicinski switch (meta->insn.off) { 1722c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 1723c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 1724943c57b9SJakub Kicinski return -EOPNOTSUPP; 1725bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 1726bfddbc8aSJakub Kicinski break; 1727c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 1728c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 1729bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1730bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1731bfddbc8aSJakub Kicinski break; 1732c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 1733c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 1734bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1735bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 1736bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1737943c57b9SJakub Kicinski break; 1738943c57b9SJakub Kicinski default: 1739d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1740943c57b9SJakub Kicinski } 1741943c57b9SJakub Kicinski 1742943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1743d9ae7f2bSJakub Kicinski 1744d9ae7f2bSJakub Kicinski return 0; 1745d9ae7f2bSJakub Kicinski } 1746d9ae7f2bSJakub Kicinski 1747943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1748943c57b9SJakub Kicinski u8 size) 1749d9ae7f2bSJakub Kicinski { 1750b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1751d9ae7f2bSJakub Kicinski 1752943c57b9SJakub Kicinski switch (meta->insn.off) { 1753c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 1754c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 1755c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1756c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1757943c57b9SJakub Kicinski break; 1758c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 1759c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 1760c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1761943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 1762943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1763943c57b9SJakub Kicinski break; 1764943c57b9SJakub Kicinski default: 1765943c57b9SJakub Kicinski return -EOPNOTSUPP; 1766943c57b9SJakub Kicinski } 1767d9ae7f2bSJakub Kicinski 1768943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1769d9ae7f2bSJakub Kicinski 1770d9ae7f2bSJakub Kicinski return 0; 1771d9ae7f2bSJakub Kicinski } 1772d9ae7f2bSJakub Kicinski 17732ca71441SJakub Kicinski static int 17742ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 17752ca71441SJakub Kicinski unsigned int size) 17762ca71441SJakub Kicinski { 17772ca71441SJakub Kicinski swreg tmp_reg; 17782ca71441SJakub Kicinski 17792ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 17802ca71441SJakub Kicinski 17812ca71441SJakub Kicinski return data_ld_host_order(nfp_prog, meta->insn.src_reg * 2, tmp_reg, 17822ca71441SJakub Kicinski meta->insn.dst_reg * 2, size); 17832ca71441SJakub Kicinski } 17842ca71441SJakub Kicinski 17852ca71441SJakub Kicinski static int 17862ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 17872ca71441SJakub Kicinski unsigned int size) 17882ca71441SJakub Kicinski { 17899879a381SJiong Wang if (meta->ldst_gather_len) 17909879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 17919879a381SJiong Wang 17922ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 1793012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 17942ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 17952ca71441SJakub Kicinski else 17962ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 17972ca71441SJakub Kicinski } 17982ca71441SJakub Kicinski 17992ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 18002ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 18012ca71441SJakub Kicinski 1802a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 1803d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 1804d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 1805a82b23fbSJakub Kicinski 18062ca71441SJakub Kicinski return -EOPNOTSUPP; 18072ca71441SJakub Kicinski } 18082ca71441SJakub Kicinski 18092ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 18102ca71441SJakub Kicinski { 18112ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 18122ca71441SJakub Kicinski } 18132ca71441SJakub Kicinski 18142ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 18152ca71441SJakub Kicinski { 18162ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 18172ca71441SJakub Kicinski } 18182ca71441SJakub Kicinski 1819d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1820d9ae7f2bSJakub Kicinski { 18212ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 18222ca71441SJakub Kicinski } 18232ca71441SJakub Kicinski 18242ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 18252ca71441SJakub Kicinski { 18262ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 1827d9ae7f2bSJakub Kicinski } 1828d9ae7f2bSJakub Kicinski 1829e663fe38SJakub Kicinski static int 1830e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1831e663fe38SJakub Kicinski unsigned int size) 1832d9ae7f2bSJakub Kicinski { 1833e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1834e663fe38SJakub Kicinski swreg off_reg; 1835e663fe38SJakub Kicinski 1836e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 1837e663fe38SJakub Kicinski 1838e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 1839e663fe38SJakub Kicinski imm, size); 1840e663fe38SJakub Kicinski } 1841e663fe38SJakub Kicinski 1842e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1843e663fe38SJakub Kicinski unsigned int size) 1844e663fe38SJakub Kicinski { 1845e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 1846e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 1847e663fe38SJakub Kicinski 1848d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1849d9ae7f2bSJakub Kicinski } 1850d9ae7f2bSJakub Kicinski 1851e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1852d9ae7f2bSJakub Kicinski { 1853e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 1854e663fe38SJakub Kicinski } 1855e663fe38SJakub Kicinski 1856e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1857e663fe38SJakub Kicinski { 1858e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 1859e663fe38SJakub Kicinski } 1860e663fe38SJakub Kicinski 1861e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1862e663fe38SJakub Kicinski { 1863e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 1864e663fe38SJakub Kicinski } 1865e663fe38SJakub Kicinski 1866e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1867e663fe38SJakub Kicinski { 1868e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 1869e663fe38SJakub Kicinski } 1870e663fe38SJakub Kicinski 1871e663fe38SJakub Kicinski static int 1872e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1873e663fe38SJakub Kicinski unsigned int size) 1874e663fe38SJakub Kicinski { 1875e663fe38SJakub Kicinski swreg off_reg; 1876e663fe38SJakub Kicinski 1877e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 1878e663fe38SJakub Kicinski 1879e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 1880e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 1881e663fe38SJakub Kicinski } 1882e663fe38SJakub Kicinski 1883e663fe38SJakub Kicinski static int 1884ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1885d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1886ee9133a8SJakub Kicinski { 1887d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1888b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 1889b14157eeSJakub Kicinski false, wrp_lmem_store); 1890ee9133a8SJakub Kicinski } 1891ee9133a8SJakub Kicinski 1892ee9133a8SJakub Kicinski static int 1893e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1894e663fe38SJakub Kicinski unsigned int size) 1895e663fe38SJakub Kicinski { 1896e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 1897e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 1898e663fe38SJakub Kicinski 1899ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 1900d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 1901d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 1902ee9133a8SJakub Kicinski 1903d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1904d9ae7f2bSJakub Kicinski } 1905d9ae7f2bSJakub Kicinski 1906e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1907e663fe38SJakub Kicinski { 1908e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 1909e663fe38SJakub Kicinski } 1910e663fe38SJakub Kicinski 1911e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1912e663fe38SJakub Kicinski { 1913e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 1914e663fe38SJakub Kicinski } 1915e663fe38SJakub Kicinski 1916d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1917d9ae7f2bSJakub Kicinski { 1918e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 1919e663fe38SJakub Kicinski } 19202ca71441SJakub Kicinski 1921e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1922e663fe38SJakub Kicinski { 1923e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 1924d9ae7f2bSJakub Kicinski } 1925d9ae7f2bSJakub Kicinski 1926d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1927d9ae7f2bSJakub Kicinski { 1928d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 1929d9ae7f2bSJakub Kicinski 1930d9ae7f2bSJakub Kicinski return 0; 1931d9ae7f2bSJakub Kicinski } 1932d9ae7f2bSJakub Kicinski 1933d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1934d9ae7f2bSJakub Kicinski { 1935d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1936d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1937b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 1938b3f868dfSJakub Kicinski 1939b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 1940b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 1941d9ae7f2bSJakub Kicinski 1942d9ae7f2bSJakub Kicinski if (imm & ~0U) { 1943d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1944d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 1945d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 1946d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 1947d9ae7f2bSJakub Kicinski } 1948d9ae7f2bSJakub Kicinski 1949d9ae7f2bSJakub Kicinski if (imm >> 32) { 1950d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1951d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1952d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 1953d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 1954d9ae7f2bSJakub Kicinski } 1955d9ae7f2bSJakub Kicinski 1956d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 1957d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 1958d9ae7f2bSJakub Kicinski 1959d9ae7f2bSJakub Kicinski return 0; 1960d9ae7f2bSJakub Kicinski } 1961d9ae7f2bSJakub Kicinski 1962d9ae7f2bSJakub Kicinski static int jgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1963d9ae7f2bSJakub Kicinski { 196426fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true); 1965d9ae7f2bSJakub Kicinski } 1966d9ae7f2bSJakub Kicinski 1967d9ae7f2bSJakub Kicinski static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1968d9ae7f2bSJakub Kicinski { 196926fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false); 1970d9ae7f2bSJakub Kicinski } 1971d9ae7f2bSJakub Kicinski 19725dd294d4SDaniel Borkmann static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19735dd294d4SDaniel Borkmann { 197426fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, false); 19755dd294d4SDaniel Borkmann } 19765dd294d4SDaniel Borkmann 19775dd294d4SDaniel Borkmann static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19785dd294d4SDaniel Borkmann { 197926fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); 19805dd294d4SDaniel Borkmann } 19815dd294d4SDaniel Borkmann 1982c087aa8bSNic Viljoen static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1983c087aa8bSNic Viljoen { 1984c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true); 1985c087aa8bSNic Viljoen } 1986c087aa8bSNic Viljoen 1987c087aa8bSNic Viljoen static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1988c087aa8bSNic Viljoen { 1989c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false); 1990c087aa8bSNic Viljoen } 1991c087aa8bSNic Viljoen 1992c087aa8bSNic Viljoen static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1993c087aa8bSNic Viljoen { 1994c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false); 1995c087aa8bSNic Viljoen } 1996c087aa8bSNic Viljoen 1997c087aa8bSNic Viljoen static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1998c087aa8bSNic Viljoen { 1999c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true); 2000c087aa8bSNic Viljoen } 2001c087aa8bSNic Viljoen 2002d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2003d9ae7f2bSJakub Kicinski { 2004d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2005d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2006b3f868dfSJakub Kicinski swreg tmp_reg; 2007d9ae7f2bSJakub Kicinski 2008d9ae7f2bSJakub Kicinski if (!imm) { 2009d9ae7f2bSJakub Kicinski meta->skip = true; 2010d9ae7f2bSJakub Kicinski return 0; 2011d9ae7f2bSJakub Kicinski } 2012d9ae7f2bSJakub Kicinski 2013d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2014d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2015d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2016d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2017d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2018d9ae7f2bSJakub Kicinski } 2019d9ae7f2bSJakub Kicinski 2020d9ae7f2bSJakub Kicinski if (imm >> 32) { 2021d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2022d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2023d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2024d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2025d9ae7f2bSJakub Kicinski } 2026d9ae7f2bSJakub Kicinski 2027d9ae7f2bSJakub Kicinski return 0; 2028d9ae7f2bSJakub Kicinski } 2029d9ae7f2bSJakub Kicinski 2030d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2031d9ae7f2bSJakub Kicinski { 2032d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2033d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2034b3f868dfSJakub Kicinski swreg tmp_reg; 2035d9ae7f2bSJakub Kicinski 2036d9ae7f2bSJakub Kicinski if (!imm) { 2037d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2038d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2039d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 204082837370SJakub Kicinski return 0; 2041d9ae7f2bSJakub Kicinski } 2042d9ae7f2bSJakub Kicinski 2043d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2044d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2045d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2046d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2047d9ae7f2bSJakub Kicinski 2048d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2049d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2050d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2051d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2052d9ae7f2bSJakub Kicinski 2053d9ae7f2bSJakub Kicinski return 0; 2054d9ae7f2bSJakub Kicinski } 2055d9ae7f2bSJakub Kicinski 2056d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2057d9ae7f2bSJakub Kicinski { 2058d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2059d9ae7f2bSJakub Kicinski 2060d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2061d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2062d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2063d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2064d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2065d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2066d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2067d9ae7f2bSJakub Kicinski 2068d9ae7f2bSJakub Kicinski return 0; 2069d9ae7f2bSJakub Kicinski } 2070d9ae7f2bSJakub Kicinski 2071d9ae7f2bSJakub Kicinski static int jgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2072d9ae7f2bSJakub Kicinski { 207326fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true); 2074d9ae7f2bSJakub Kicinski } 2075d9ae7f2bSJakub Kicinski 2076d9ae7f2bSJakub Kicinski static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2077d9ae7f2bSJakub Kicinski { 207826fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false); 2079d9ae7f2bSJakub Kicinski } 2080d9ae7f2bSJakub Kicinski 20815dd294d4SDaniel Borkmann static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20825dd294d4SDaniel Borkmann { 208326fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, false); 20845dd294d4SDaniel Borkmann } 20855dd294d4SDaniel Borkmann 20865dd294d4SDaniel Borkmann static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20875dd294d4SDaniel Borkmann { 208826fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); 20895dd294d4SDaniel Borkmann } 20905dd294d4SDaniel Borkmann 2091c087aa8bSNic Viljoen static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2092c087aa8bSNic Viljoen { 2093c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true); 2094c087aa8bSNic Viljoen } 2095c087aa8bSNic Viljoen 2096c087aa8bSNic Viljoen static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2097c087aa8bSNic Viljoen { 2098c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false); 2099c087aa8bSNic Viljoen } 2100c087aa8bSNic Viljoen 2101c087aa8bSNic Viljoen static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2102c087aa8bSNic Viljoen { 2103c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false); 2104c087aa8bSNic Viljoen } 2105c087aa8bSNic Viljoen 2106c087aa8bSNic Viljoen static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2107c087aa8bSNic Viljoen { 2108c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, true); 2109c087aa8bSNic Viljoen } 2110c087aa8bSNic Viljoen 2111d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2112d9ae7f2bSJakub Kicinski { 2113d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2114d9ae7f2bSJakub Kicinski } 2115d9ae7f2bSJakub Kicinski 2116d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2117d9ae7f2bSJakub Kicinski { 2118d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2119d9ae7f2bSJakub Kicinski } 2120d9ae7f2bSJakub Kicinski 21212cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21222cb230bdSJakub Kicinski { 21232cb230bdSJakub Kicinski switch (meta->insn.imm) { 21240d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 21250d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 212677a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 212777a3d311SJakub Kicinski return map_lookup_stack(nfp_prog, meta); 21282cb230bdSJakub Kicinski default: 21292cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 21302cb230bdSJakub Kicinski return -EOPNOTSUPP; 21312cb230bdSJakub Kicinski } 21322cb230bdSJakub Kicinski } 21332cb230bdSJakub Kicinski 2134d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2135d9ae7f2bSJakub Kicinski { 2136e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2137d9ae7f2bSJakub Kicinski 2138d9ae7f2bSJakub Kicinski return 0; 2139d9ae7f2bSJakub Kicinski } 2140d9ae7f2bSJakub Kicinski 2141d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2142d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2143d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2144d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2145d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2146d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2147d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2148d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2149d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2150d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2151d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2152d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2153d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2154254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2155d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2156d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2157d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2158d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2159d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2160d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2161d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2162d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2163d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2164d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2165d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2166d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2167d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2168d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2169254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2170d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 21713119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2172d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2173d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2174d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2175d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2176d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2177d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2178d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 21792ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 21802ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2181d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 21822ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2183e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2184e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2185d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2186e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2187e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2188e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2189e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2190e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2191d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2192d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 2193d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = jgt_imm, 2194d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, 21955dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, 21965dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, 2197c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_K] = jsgt_imm, 2198c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_K] = jsge_imm, 2199c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_K] = jslt_imm, 2200c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_K] = jsle_imm, 2201d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2202d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2203d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 2204d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = jgt_reg, 2205d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, 22065dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, 22075dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, 2208c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_X] = jsgt_reg, 2209c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_X] = jsge_reg, 2210c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_X] = jslt_reg, 2211c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_X] = jsle_reg, 2212d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2213d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 22142cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2215d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2216d9ae7f2bSJakub Kicinski }; 2217d9ae7f2bSJakub Kicinski 2218d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2219d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2220d9ae7f2bSJakub Kicinski { 22215b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2222854dc87dSJiong Wang u32 idx, br_idx; 2223d9ae7f2bSJakub Kicinski 2224854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2225d9ae7f2bSJakub Kicinski if (meta->skip) 2226d9ae7f2bSJakub Kicinski continue; 22272cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 22282cb230bdSJakub Kicinski continue; 2229d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2230d9ae7f2bSJakub Kicinski continue; 2231d9ae7f2bSJakub Kicinski 22325b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 22332314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 22345b674140SJiong Wang else 22352314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2236854dc87dSJiong Wang 2237d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2238d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2239d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2240d9ae7f2bSJakub Kicinski return -ELOOP; 2241d9ae7f2bSJakub Kicinski } 2242d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 22432314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 22442314fe9eSJakub Kicinski RELO_BR_REL) 2245d9ae7f2bSJakub Kicinski continue; 2246d9ae7f2bSJakub Kicinski 22475b674140SJiong Wang if (!meta->jmp_dst) { 22485b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2249d9ae7f2bSJakub Kicinski return -ELOOP; 2250d9ae7f2bSJakub Kicinski } 2251d9ae7f2bSJakub Kicinski 22525b674140SJiong Wang jmp_dst = meta->jmp_dst; 2253854dc87dSJiong Wang 22545b674140SJiong Wang if (jmp_dst->skip) { 2255d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2256d9ae7f2bSJakub Kicinski return -ELOOP; 2257d9ae7f2bSJakub Kicinski } 2258d9ae7f2bSJakub Kicinski 22592314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2260d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2261d9ae7f2bSJakub Kicinski continue; 22625b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2263d9ae7f2bSJakub Kicinski } 2264d9ae7f2bSJakub Kicinski } 2265d9ae7f2bSJakub Kicinski 2266d9ae7f2bSJakub Kicinski return 0; 2267d9ae7f2bSJakub Kicinski } 2268d9ae7f2bSJakub Kicinski 2269d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2270d9ae7f2bSJakub Kicinski { 227118e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 227218e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 227318e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2274d9ae7f2bSJakub Kicinski } 2275d9ae7f2bSJakub Kicinski 2276d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2277d9ae7f2bSJakub Kicinski { 2278d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2279d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2280d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2281d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2282d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2283d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2284d9ae7f2bSJakub Kicinski * 2285d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2286d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2287d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2288d9ae7f2bSJakub Kicinski * packets up the stack. 2289d9ae7f2bSJakub Kicinski */ 2290d9ae7f2bSJakub Kicinski /* Target for aborts */ 2291d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2292d9ae7f2bSJakub Kicinski 2293e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2294d9ae7f2bSJakub Kicinski 2295c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2296d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2297d9ae7f2bSJakub Kicinski 2298d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2299d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2300d9ae7f2bSJakub Kicinski 2301d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2302d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2303d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2304c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2305d9ae7f2bSJakub Kicinski 2306d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2307d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2308d9ae7f2bSJakub Kicinski 2309d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2310d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2311d9ae7f2bSJakub Kicinski 2312d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2313d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2314d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2315d9ae7f2bSJakub Kicinski 2316d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2317d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2318d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2319d9ae7f2bSJakub Kicinski 2320e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2321d9ae7f2bSJakub Kicinski 2322d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2323d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2324d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2325d9ae7f2bSJakub Kicinski } 2326d9ae7f2bSJakub Kicinski 2327d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2328d9ae7f2bSJakub Kicinski { 2329d9ae7f2bSJakub Kicinski /* XDP return codes: 2330d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2331d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2332d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2333d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2334d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2335d9ae7f2bSJakub Kicinski */ 2336d9ae7f2bSJakub Kicinski /* Target for aborts */ 2337d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2338d9ae7f2bSJakub Kicinski 2339e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2340d9ae7f2bSJakub Kicinski 2341c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2342d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2343d9ae7f2bSJakub Kicinski 2344d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2345d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2346d9ae7f2bSJakub Kicinski 2347d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2348d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2349d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2350d9ae7f2bSJakub Kicinski 2351d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2352d9ae7f2bSJakub Kicinski 2353d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2354d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2355d9ae7f2bSJakub Kicinski 2356d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2357d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2358d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2359d9ae7f2bSJakub Kicinski 2360e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2361d9ae7f2bSJakub Kicinski 2362c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2363d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2364d9ae7f2bSJakub Kicinski } 2365d9ae7f2bSJakub Kicinski 2366d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2367d9ae7f2bSJakub Kicinski { 2368012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2369012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2370d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2371d9ae7f2bSJakub Kicinski break; 2372012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2373d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2374d9ae7f2bSJakub Kicinski break; 2375012bb8a8SJakub Kicinski default: 2376012bb8a8SJakub Kicinski WARN_ON(1); 2377d9ae7f2bSJakub Kicinski } 2378d9ae7f2bSJakub Kicinski } 2379d9ae7f2bSJakub Kicinski 2380d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2381d9ae7f2bSJakub Kicinski { 2382d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2383ff42bb9fSJakub Kicinski int err; 2384d9ae7f2bSJakub Kicinski 2385d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2386d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2387d9ae7f2bSJakub Kicinski return nfp_prog->error; 2388d9ae7f2bSJakub Kicinski 2389d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2390d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2391d9ae7f2bSJakub Kicinski 2392d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2393d9ae7f2bSJakub Kicinski 2394d9ae7f2bSJakub Kicinski if (meta->skip) { 2395d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2396d9ae7f2bSJakub Kicinski continue; 2397d9ae7f2bSJakub Kicinski } 2398d9ae7f2bSJakub Kicinski 2399d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2400d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2401d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2402d9ae7f2bSJakub Kicinski if (!cb) 2403d9ae7f2bSJakub Kicinski return -ENOENT; 2404d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2405d9ae7f2bSJakub Kicinski if (err) 2406d9ae7f2bSJakub Kicinski return err; 2407d9ae7f2bSJakub Kicinski 2408d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2409d9ae7f2bSJakub Kicinski } 2410d9ae7f2bSJakub Kicinski 2411854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 2412854dc87dSJiong Wang 2413d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 2414d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2415d9ae7f2bSJakub Kicinski return nfp_prog->error; 2416d9ae7f2bSJakub Kicinski 2417ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 24181c03e03fSJakub Kicinski if (nfp_prog->error) 24191c03e03fSJakub Kicinski return nfp_prog->error; 24201c03e03fSJakub Kicinski 2421d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 2422d9ae7f2bSJakub Kicinski } 2423d9ae7f2bSJakub Kicinski 2424d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 2425d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 2426d9ae7f2bSJakub Kicinski { 2427d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2428d9ae7f2bSJakub Kicinski 2429d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2430d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 2431d9ae7f2bSJakub Kicinski 2432d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 2433d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 2434d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 2435d9ae7f2bSJakub Kicinski continue; 2436d9ae7f2bSJakub Kicinski 2437d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 2438d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 2439d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 2440d9ae7f2bSJakub Kicinski meta->skip = true; 2441d9ae7f2bSJakub Kicinski 2442d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 2443d9ae7f2bSJakub Kicinski if (!meta->skip) 2444d9ae7f2bSJakub Kicinski return; 2445d9ae7f2bSJakub Kicinski } 2446d9ae7f2bSJakub Kicinski } 2447d9ae7f2bSJakub Kicinski 2448d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 2449d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 2450d9ae7f2bSJakub Kicinski { 2451d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 2452d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 2453d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 2454d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 2455d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 2456d9ae7f2bSJakub Kicinski }; 2457d9ae7f2bSJakub Kicinski 2458d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 2459d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 2460d9ae7f2bSJakub Kicinski 2461d9ae7f2bSJakub Kicinski insn = meta1->insn; 2462d9ae7f2bSJakub Kicinski next = meta2->insn; 2463d9ae7f2bSJakub Kicinski 2464d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2465d9ae7f2bSJakub Kicinski continue; 2466d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2467d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2468d9ae7f2bSJakub Kicinski continue; 2469d9ae7f2bSJakub Kicinski 2470d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 2471d9ae7f2bSJakub Kicinski continue; 2472d9ae7f2bSJakub Kicinski 2473d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 2474d9ae7f2bSJakub Kicinski continue; 2475d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 2476d9ae7f2bSJakub Kicinski continue; 2477d9ae7f2bSJakub Kicinski 2478d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 2479d9ae7f2bSJakub Kicinski continue; 2480d9ae7f2bSJakub Kicinski 24811266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 24821266f5d6SJiong Wang continue; 24831266f5d6SJiong Wang 2484d9ae7f2bSJakub Kicinski meta2->skip = true; 2485d9ae7f2bSJakub Kicinski } 2486d9ae7f2bSJakub Kicinski } 2487d9ae7f2bSJakub Kicinski 2488d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 2489d9ae7f2bSJakub Kicinski { 2490d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 2491d9ae7f2bSJakub Kicinski 2492d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 2493d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 2494d9ae7f2bSJakub Kicinski 2495d9ae7f2bSJakub Kicinski insn = meta1->insn; 2496d9ae7f2bSJakub Kicinski next1 = meta2->insn; 2497d9ae7f2bSJakub Kicinski next2 = meta3->insn; 2498d9ae7f2bSJakub Kicinski 2499d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2500d9ae7f2bSJakub Kicinski continue; 2501d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2502d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2503d9ae7f2bSJakub Kicinski continue; 2504d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 2505d9ae7f2bSJakub Kicinski continue; 2506d9ae7f2bSJakub Kicinski 2507d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 2508d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 2509d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 2510d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 2511d9ae7f2bSJakub Kicinski continue; 2512d9ae7f2bSJakub Kicinski 2513d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 2514d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 2515d9ae7f2bSJakub Kicinski continue; 2516d9ae7f2bSJakub Kicinski 2517d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 2518d9ae7f2bSJakub Kicinski continue; 2519d9ae7f2bSJakub Kicinski 252029fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 252129fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 252229fe46efSJiong Wang continue; 252329fe46efSJiong Wang 2524d9ae7f2bSJakub Kicinski meta2->skip = true; 2525d9ae7f2bSJakub Kicinski meta3->skip = true; 2526d9ae7f2bSJakub Kicinski } 2527d9ae7f2bSJakub Kicinski } 2528d9ae7f2bSJakub Kicinski 25296bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 25306bc7103cSJiong Wang * 25316bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 25326bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 25336bc7103cSJiong Wang * 25346bc7103cSJiong Wang * The destination register of load and source register of store should 25356bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 25366bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 25376bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 25386bc7103cSJiong Wang */ 25396bc7103cSJiong Wang static bool 25406bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 25416bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 25426bc7103cSJiong Wang { 25436bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 25446bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 25456bc7103cSJiong Wang 25466bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 25476bc7103cSJiong Wang return false; 25486bc7103cSJiong Wang 25496bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 25506bc7103cSJiong Wang return false; 25516bc7103cSJiong Wang 25526bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 25536bc7103cSJiong Wang return false; 25546bc7103cSJiong Wang 25556bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 25566bc7103cSJiong Wang return false; 25576bc7103cSJiong Wang 25586bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 25596bc7103cSJiong Wang return false; 25606bc7103cSJiong Wang 25616bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 25626bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 25636bc7103cSJiong Wang return false; 25646bc7103cSJiong Wang 25656bc7103cSJiong Wang return true; 25666bc7103cSJiong Wang } 25676bc7103cSJiong Wang 25686bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 25696bc7103cSJiong Wang * 25706bc7103cSJiong Wang * - Their address base registers are the same. 25716bc7103cSJiong Wang * - Their address offsets are in the same order. 25726bc7103cSJiong Wang * - They operate at the same memory width. 25736bc7103cSJiong Wang * - There is no jump into the middle of them. 25746bc7103cSJiong Wang */ 25756bc7103cSJiong Wang static bool 25766bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 25776bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 25786bc7103cSJiong Wang struct bpf_insn *prev_ld, 25796bc7103cSJiong Wang struct bpf_insn *prev_st) 25806bc7103cSJiong Wang { 25816bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 25826bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 25836bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 25846bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 25856bc7103cSJiong Wang 25866bc7103cSJiong Wang /* This pair is the start pair. */ 25876bc7103cSJiong Wang if (!prev_ld) 25886bc7103cSJiong Wang return true; 25896bc7103cSJiong Wang 25906bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 25916bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 25926bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 25936bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 25946bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 25956bc7103cSJiong Wang prev_ld_off = prev_ld->off; 25966bc7103cSJiong Wang prev_st_off = prev_st->off; 25976bc7103cSJiong Wang 25986bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 25996bc7103cSJiong Wang return false; 26006bc7103cSJiong Wang 26016bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 26026bc7103cSJiong Wang return false; 26036bc7103cSJiong Wang 26046bc7103cSJiong Wang if (curr_size != prev_size) 26056bc7103cSJiong Wang return false; 26066bc7103cSJiong Wang 26076bc7103cSJiong Wang /* There is jump to the head of this pair. */ 26086bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 26096bc7103cSJiong Wang return false; 26106bc7103cSJiong Wang 26116bc7103cSJiong Wang /* Both in ascending order. */ 26126bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 26136bc7103cSJiong Wang prev_st_off + prev_size == st->off) 26146bc7103cSJiong Wang return true; 26156bc7103cSJiong Wang 26166bc7103cSJiong Wang /* Both in descending order. */ 26176bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 26186bc7103cSJiong Wang st->off + curr_size == prev_st_off) 26196bc7103cSJiong Wang return true; 26206bc7103cSJiong Wang 26216bc7103cSJiong Wang return false; 26226bc7103cSJiong Wang } 26236bc7103cSJiong Wang 26246bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 26256bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 26266bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 26276bc7103cSJiong Wang * as an memory copy. 26286bc7103cSJiong Wang */ 26296bc7103cSJiong Wang static bool 26306bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 26316bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 26326bc7103cSJiong Wang { 26336bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 26346bc7103cSJiong Wang 26356bc7103cSJiong Wang /* Different pointer types does not overlap. */ 26366bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 26376bc7103cSJiong Wang return false; 26386bc7103cSJiong Wang 26396bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 26406bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 26416bc7103cSJiong Wang return true; 26426bc7103cSJiong Wang 26436bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 26446bc7103cSJiong Wang * base register. 26456bc7103cSJiong Wang */ 26466bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 26476bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 26486bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 26496bc7103cSJiong Wang 26506bc7103cSJiong Wang /* Ascending order cross. */ 26516bc7103cSJiong Wang if (ld_off > head_ld_off && 26526bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 26536bc7103cSJiong Wang return true; 26546bc7103cSJiong Wang 26556bc7103cSJiong Wang /* Descending order cross. */ 26566bc7103cSJiong Wang if (ld_off < head_ld_off && 26576bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 26586bc7103cSJiong Wang return true; 26596bc7103cSJiong Wang 26606bc7103cSJiong Wang return false; 26616bc7103cSJiong Wang } 26626bc7103cSJiong Wang 26636bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 26646bc7103cSJiong Wang * 26656bc7103cSJiong Wang * load R, [regA + offA] 26666bc7103cSJiong Wang * store [regB + offB], R 26676bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 26686bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 26696bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 26706bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 26716bc7103cSJiong Wang * ... 26726bc7103cSJiong Wang * 26736bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 26746bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 26756bc7103cSJiong Wang */ 26766bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 26776bc7103cSJiong Wang { 26786bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 26796bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 26806bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 26816bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 26826bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 26836bc7103cSJiong Wang u8 count = 0; 26846bc7103cSJiong Wang 26856bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 26866bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 26876bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 26886bc7103cSJiong Wang 26896bc7103cSJiong Wang /* Reset record status if any of the following if true: 26906bc7103cSJiong Wang * - The current insn pair is not load/store. 26916bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 26926bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 26936bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 26946bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 26956bc7103cSJiong Wang * single NFP CPP command can transfer. 26966bc7103cSJiong Wang */ 26976bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 26986bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 26996bc7103cSJiong Wang prev_st) || 27006bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 27016bc7103cSJiong Wang head_st_meta) || 27026bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 27036bc7103cSJiong Wang if (!count) 27046bc7103cSJiong Wang continue; 27056bc7103cSJiong Wang 27066bc7103cSJiong Wang if (count > 1) { 27076bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 27086bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 27096bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 27106bc7103cSJiong Wang 27116bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 27126bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 27136bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 27146bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 27156bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 27166bc7103cSJiong Wang } 27176bc7103cSJiong Wang 27186bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 27196bc7103cSJiong Wang head_st_meta->skip = true; 27206bc7103cSJiong Wang } else { 27216bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 27226bc7103cSJiong Wang } 27236bc7103cSJiong Wang 27246bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 27256bc7103cSJiong Wang * could serve as the new head of the the next chain. 27266bc7103cSJiong Wang */ 27276bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 27286bc7103cSJiong Wang head_ld_meta = meta1; 27296bc7103cSJiong Wang head_st_meta = meta2; 27306bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 27316bc7103cSJiong Wang BPF_LDST_BYTES(ld); 27326bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 27336bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 27346bc7103cSJiong Wang prev_ld = ld; 27356bc7103cSJiong Wang prev_st = st; 27366bc7103cSJiong Wang count = 1; 27376bc7103cSJiong Wang } else { 27386bc7103cSJiong Wang head_ld_meta = NULL; 27396bc7103cSJiong Wang head_st_meta = NULL; 27406bc7103cSJiong Wang prev_ld = NULL; 27416bc7103cSJiong Wang prev_st = NULL; 27426bc7103cSJiong Wang count = 0; 27436bc7103cSJiong Wang } 27446bc7103cSJiong Wang 27456bc7103cSJiong Wang continue; 27466bc7103cSJiong Wang } 27476bc7103cSJiong Wang 27486bc7103cSJiong Wang if (!head_ld_meta) { 27496bc7103cSJiong Wang head_ld_meta = meta1; 27506bc7103cSJiong Wang head_st_meta = meta2; 27516bc7103cSJiong Wang } else { 27526bc7103cSJiong Wang meta1->skip = true; 27536bc7103cSJiong Wang meta2->skip = true; 27546bc7103cSJiong Wang } 27556bc7103cSJiong Wang 27566bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 27576bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 27586bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 27596bc7103cSJiong Wang prev_ld = ld; 27606bc7103cSJiong Wang prev_st = st; 27616bc7103cSJiong Wang count++; 27626bc7103cSJiong Wang } 27636bc7103cSJiong Wang } 27646bc7103cSJiong Wang 2765d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 2766d9ae7f2bSJakub Kicinski { 2767d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 2768d9ae7f2bSJakub Kicinski 2769d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 2770d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 27716bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 2772d9ae7f2bSJakub Kicinski 2773d9ae7f2bSJakub Kicinski return 0; 2774d9ae7f2bSJakub Kicinski } 2775d9ae7f2bSJakub Kicinski 27762314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 2777fd068ddcSJakub Kicinski { 27782314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 2779fd068ddcSJakub Kicinski int i; 2780fd068ddcSJakub Kicinski 27812314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 2782fd068ddcSJakub Kicinski int err; 2783fd068ddcSJakub Kicinski 27842314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 2785fd068ddcSJakub Kicinski if (err) 2786fd068ddcSJakub Kicinski return err; 2787fd068ddcSJakub Kicinski 27882314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 2789fd068ddcSJakub Kicinski } 2790fd068ddcSJakub Kicinski 2791fd068ddcSJakub Kicinski return 0; 2792fd068ddcSJakub Kicinski } 2793fd068ddcSJakub Kicinski 279444a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 279544a12eccSJakub Kicinski { 279644a12eccSJakub Kicinski void *prog; 279744a12eccSJakub Kicinski 279844a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 279944a12eccSJakub Kicinski if (!prog) 280044a12eccSJakub Kicinski return; 280144a12eccSJakub Kicinski 280244a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 280344a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 280444a12eccSJakub Kicinski kvfree(nfp_prog->prog); 280544a12eccSJakub Kicinski nfp_prog->prog = prog; 280644a12eccSJakub Kicinski } 280744a12eccSJakub Kicinski 2808c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 2809d9ae7f2bSJakub Kicinski { 2810d9ae7f2bSJakub Kicinski int ret; 2811d9ae7f2bSJakub Kicinski 2812d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 2813d9ae7f2bSJakub Kicinski if (ret) 28149314c442SJakub Kicinski return ret; 2815d9ae7f2bSJakub Kicinski 2816d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 2817d9ae7f2bSJakub Kicinski if (ret) { 2818d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 2819d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 28209314c442SJakub Kicinski return -EINVAL; 2821d9ae7f2bSJakub Kicinski } 2822d9ae7f2bSJakub Kicinski 282344a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 282444a12eccSJakub Kicinski 28252314fe9eSJakub Kicinski return ret; 2826d9ae7f2bSJakub Kicinski } 28271549921dSJakub Kicinski 28281549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 28291549921dSJakub Kicinski { 28301549921dSJakub Kicinski struct nfp_insn_meta *meta; 28311549921dSJakub Kicinski 28321549921dSJakub Kicinski /* Another pass to record jump information. */ 28331549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 28341549921dSJakub Kicinski u64 code = meta->insn.code; 28351549921dSJakub Kicinski 28361549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 28371549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 28381549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 28391549921dSJakub Kicinski unsigned short dst_indx; 28401549921dSJakub Kicinski 28411549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 28421549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 28431549921dSJakub Kicinski cnt); 28441549921dSJakub Kicinski 28451549921dSJakub Kicinski meta->jmp_dst = dst_meta; 28461549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 28471549921dSJakub Kicinski } 28481549921dSJakub Kicinski } 28491549921dSJakub Kicinski } 28502314fe9eSJakub Kicinski 28512314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 28522314fe9eSJakub Kicinski { 28532314fe9eSJakub Kicinski unsigned int i; 28542314fe9eSJakub Kicinski u64 *prog; 28552314fe9eSJakub Kicinski int err; 28562314fe9eSJakub Kicinski 28572314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 28582314fe9eSJakub Kicinski GFP_KERNEL); 28592314fe9eSJakub Kicinski if (!prog) 28602314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 28612314fe9eSJakub Kicinski 28622314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 28632314fe9eSJakub Kicinski enum nfp_relo_type special; 286477a3d311SJakub Kicinski u32 val; 28652314fe9eSJakub Kicinski 28662314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 28672314fe9eSJakub Kicinski switch (special) { 28682314fe9eSJakub Kicinski case RELO_NONE: 28692314fe9eSJakub Kicinski continue; 28702314fe9eSJakub Kicinski case RELO_BR_REL: 28712314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 28722314fe9eSJakub Kicinski break; 28732314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 28742314fe9eSJakub Kicinski br_set_offset(&prog[i], 28752314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 28762314fe9eSJakub Kicinski break; 28772314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 28782314fe9eSJakub Kicinski br_set_offset(&prog[i], 28792314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 28802314fe9eSJakub Kicinski break; 28812314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 28822314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 28832314fe9eSJakub Kicinski break; 288477a3d311SJakub Kicinski case RELO_BR_HELPER: 288577a3d311SJakub Kicinski val = br_get_offset(prog[i]); 288677a3d311SJakub Kicinski val -= BR_OFF_RELO; 288777a3d311SJakub Kicinski switch (val) { 288877a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 288977a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 289077a3d311SJakub Kicinski break; 289177a3d311SJakub Kicinski default: 289277a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 289377a3d311SJakub Kicinski val); 289477a3d311SJakub Kicinski err = -EINVAL; 289577a3d311SJakub Kicinski goto err_free_prog; 289677a3d311SJakub Kicinski } 289777a3d311SJakub Kicinski br_set_offset(&prog[i], val); 289877a3d311SJakub Kicinski break; 289977a3d311SJakub Kicinski case RELO_IMMED_REL: 290077a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 290177a3d311SJakub Kicinski break; 29022314fe9eSJakub Kicinski } 29032314fe9eSJakub Kicinski 29042314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 29052314fe9eSJakub Kicinski } 29062314fe9eSJakub Kicinski 29072314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 29082314fe9eSJakub Kicinski if (err) 29092314fe9eSJakub Kicinski goto err_free_prog; 29102314fe9eSJakub Kicinski 29112314fe9eSJakub Kicinski return prog; 29122314fe9eSJakub Kicinski 29132314fe9eSJakub Kicinski err_free_prog: 29142314fe9eSJakub Kicinski kfree(prog); 29152314fe9eSJakub Kicinski return ERR_PTR(err); 29162314fe9eSJakub Kicinski } 2917