1d9ae7f2bSJakub Kicinski /* 2854dc87dSJiong Wang * Copyright (C) 2016-2017 Netronome Systems, Inc. 3d9ae7f2bSJakub Kicinski * 4d9ae7f2bSJakub Kicinski * This software is dual licensed under the GNU General License Version 2, 5d9ae7f2bSJakub Kicinski * June 1991 as shown in the file COPYING in the top-level directory of this 6d9ae7f2bSJakub Kicinski * source tree or the BSD 2-Clause License provided below. You have the 7d9ae7f2bSJakub Kicinski * option to license this software under the complete terms of either license. 8d9ae7f2bSJakub Kicinski * 9d9ae7f2bSJakub Kicinski * The BSD 2-Clause License: 10d9ae7f2bSJakub Kicinski * 11d9ae7f2bSJakub Kicinski * Redistribution and use in source and binary forms, with or 12d9ae7f2bSJakub Kicinski * without modification, are permitted provided that the following 13d9ae7f2bSJakub Kicinski * conditions are met: 14d9ae7f2bSJakub Kicinski * 15d9ae7f2bSJakub Kicinski * 1. Redistributions of source code must retain the above 16d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 17d9ae7f2bSJakub Kicinski * disclaimer. 18d9ae7f2bSJakub Kicinski * 19d9ae7f2bSJakub Kicinski * 2. Redistributions in binary form must reproduce the above 20d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 21d9ae7f2bSJakub Kicinski * disclaimer in the documentation and/or other materials 22d9ae7f2bSJakub Kicinski * provided with the distribution. 23d9ae7f2bSJakub Kicinski * 24d9ae7f2bSJakub Kicinski * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25d9ae7f2bSJakub Kicinski * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26d9ae7f2bSJakub Kicinski * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27d9ae7f2bSJakub Kicinski * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28d9ae7f2bSJakub Kicinski * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29d9ae7f2bSJakub Kicinski * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30d9ae7f2bSJakub Kicinski * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31d9ae7f2bSJakub Kicinski * SOFTWARE. 32d9ae7f2bSJakub Kicinski */ 33d9ae7f2bSJakub Kicinski 34d9ae7f2bSJakub Kicinski #define pr_fmt(fmt) "NFP net bpf: " fmt 35d9ae7f2bSJakub Kicinski 360d49eaf4SJakub Kicinski #include <linux/bug.h> 37d9ae7f2bSJakub Kicinski #include <linux/kernel.h> 38d9ae7f2bSJakub Kicinski #include <linux/bpf.h> 39d9ae7f2bSJakub Kicinski #include <linux/filter.h> 40d9ae7f2bSJakub Kicinski #include <linux/pkt_cls.h> 41d9ae7f2bSJakub Kicinski #include <linux/unistd.h> 42d9ae7f2bSJakub Kicinski 43d9ae7f2bSJakub Kicinski #include "main.h" 44d9ae7f2bSJakub Kicinski #include "../nfp_asm.h" 45d9ae7f2bSJakub Kicinski 46d9ae7f2bSJakub Kicinski /* --- NFP prog --- */ 47d9ae7f2bSJakub Kicinski /* Foreach "multiple" entries macros provide pos and next<n> pointers. 48d9ae7f2bSJakub Kicinski * It's safe to modify the next pointers (but not pos). 49d9ae7f2bSJakub Kicinski */ 50d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk2(nfp_prog, pos, next) \ 51d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 52d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l); \ 53d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 54d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l; \ 55d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 56d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos)) 57d9ae7f2bSJakub Kicinski 58d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk3(nfp_prog, pos, next, next2) \ 59d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 60d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l), \ 61d9ae7f2bSJakub Kicinski next2 = list_next_entry(next, l); \ 62d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 63d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l && \ 64d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next2->l; \ 65d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 66d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos), \ 67d9ae7f2bSJakub Kicinski next2 = nfp_meta_next(next)) 68d9ae7f2bSJakub Kicinski 69d9ae7f2bSJakub Kicinski static bool 70d9ae7f2bSJakub Kicinski nfp_meta_has_prev(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 71d9ae7f2bSJakub Kicinski { 72d9ae7f2bSJakub Kicinski return meta->l.prev != &nfp_prog->insns; 73d9ae7f2bSJakub Kicinski } 74d9ae7f2bSJakub Kicinski 75d9ae7f2bSJakub Kicinski static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn) 76d9ae7f2bSJakub Kicinski { 77e8a4796eSJakub Kicinski if (nfp_prog->__prog_alloc_len / sizeof(u64) == nfp_prog->prog_len) { 78e8a4796eSJakub Kicinski pr_warn("instruction limit reached (%u NFP instructions)\n", 79e8a4796eSJakub Kicinski nfp_prog->prog_len); 80d9ae7f2bSJakub Kicinski nfp_prog->error = -ENOSPC; 81d9ae7f2bSJakub Kicinski return; 82d9ae7f2bSJakub Kicinski } 83d9ae7f2bSJakub Kicinski 84d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len] = insn; 85d9ae7f2bSJakub Kicinski nfp_prog->prog_len++; 86d9ae7f2bSJakub Kicinski } 87d9ae7f2bSJakub Kicinski 88d9ae7f2bSJakub Kicinski static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) 89d9ae7f2bSJakub Kicinski { 902314fe9eSJakub Kicinski return nfp_prog->prog_len; 91d9ae7f2bSJakub Kicinski } 92d9ae7f2bSJakub Kicinski 930d49eaf4SJakub Kicinski static bool 940d49eaf4SJakub Kicinski nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off) 950d49eaf4SJakub Kicinski { 960d49eaf4SJakub Kicinski /* If there is a recorded error we may have dropped instructions; 970d49eaf4SJakub Kicinski * that doesn't have to be due to translator bug, and the translation 980d49eaf4SJakub Kicinski * will fail anyway, so just return OK. 990d49eaf4SJakub Kicinski */ 1000d49eaf4SJakub Kicinski if (nfp_prog->error) 1010d49eaf4SJakub Kicinski return true; 1020d49eaf4SJakub Kicinski return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off); 1030d49eaf4SJakub Kicinski } 1040d49eaf4SJakub Kicinski 105d9ae7f2bSJakub Kicinski /* --- Emitters --- */ 106d9ae7f2bSJakub Kicinski static void 107d9ae7f2bSJakub Kicinski __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 1085468a8b9SJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, bool sync, bool indir) 109d9ae7f2bSJakub Kicinski { 110d9ae7f2bSJakub Kicinski enum cmd_ctx_swap ctx; 111d9ae7f2bSJakub Kicinski u64 insn; 112d9ae7f2bSJakub Kicinski 113d9ae7f2bSJakub Kicinski if (sync) 114d9ae7f2bSJakub Kicinski ctx = CMD_CTX_SWAP; 115d9ae7f2bSJakub Kicinski else 116d9ae7f2bSJakub Kicinski ctx = CMD_CTX_NO_SWAP; 117d9ae7f2bSJakub Kicinski 118d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 119d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 120d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 121d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 122d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 123d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 124d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_SIG, sync) | 125d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 1265468a8b9SJakub Kicinski FIELD_PREP(OP_CMD_INDIR, indir) | 127d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 128d9ae7f2bSJakub Kicinski 129d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 130d9ae7f2bSJakub Kicinski } 131d9ae7f2bSJakub Kicinski 132d9ae7f2bSJakub Kicinski static void 1335468a8b9SJakub Kicinski emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 1345468a8b9SJakub Kicinski swreg lreg, swreg rreg, u8 size, bool sync, bool indir) 135d9ae7f2bSJakub Kicinski { 136d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 137d9ae7f2bSJakub Kicinski int err; 138d9ae7f2bSJakub Kicinski 139d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 140d9ae7f2bSJakub Kicinski if (err) { 141d9ae7f2bSJakub Kicinski nfp_prog->error = err; 142d9ae7f2bSJakub Kicinski return; 143d9ae7f2bSJakub Kicinski } 144d9ae7f2bSJakub Kicinski if (reg.swap) { 145d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 146d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 147d9ae7f2bSJakub Kicinski return; 148d9ae7f2bSJakub Kicinski } 149995e101fSJakub Kicinski if (reg.dst_lmextn || reg.src_lmextn) { 150995e101fSJakub Kicinski pr_err("cmd can't use LMextn\n"); 151995e101fSJakub Kicinski nfp_prog->error = -EFAULT; 152995e101fSJakub Kicinski return; 153995e101fSJakub Kicinski } 154d9ae7f2bSJakub Kicinski 1555468a8b9SJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, sync, 1565468a8b9SJakub Kicinski indir); 1575468a8b9SJakub Kicinski } 1585468a8b9SJakub Kicinski 1595468a8b9SJakub Kicinski static void 1605468a8b9SJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 1615468a8b9SJakub Kicinski swreg lreg, swreg rreg, u8 size, bool sync) 1625468a8b9SJakub Kicinski { 1635468a8b9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, sync, false); 164d9ae7f2bSJakub Kicinski } 165d9ae7f2bSJakub Kicinski 166d9ae7f2bSJakub Kicinski static void 1679879a381SJiong Wang emit_cmd_indir(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 1689879a381SJiong Wang swreg lreg, swreg rreg, u8 size, bool sync) 1699879a381SJiong Wang { 1709879a381SJiong Wang emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, sync, true); 1719879a381SJiong Wang } 1729879a381SJiong Wang 1739879a381SJiong Wang static void 174d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 175d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 176d9ae7f2bSJakub Kicinski { 177d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 178d9ae7f2bSJakub Kicinski u64 insn; 179d9ae7f2bSJakub Kicinski 180d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 181d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 182d9ae7f2bSJakub Kicinski 183d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 184d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 185d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 186d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 187d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 188d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 189d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 190d9ae7f2bSJakub Kicinski 191d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 192d9ae7f2bSJakub Kicinski } 193d9ae7f2bSJakub Kicinski 1942314fe9eSJakub Kicinski static void 1952314fe9eSJakub Kicinski emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, 1962314fe9eSJakub Kicinski enum nfp_relo_type relo) 197d9ae7f2bSJakub Kicinski { 1982314fe9eSJakub Kicinski if (mask == BR_UNC && defer > 2) { 199d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 200d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 201d9ae7f2bSJakub Kicinski return; 202d9ae7f2bSJakub Kicinski } 2032314fe9eSJakub Kicinski 2042314fe9eSJakub Kicinski __emit_br(nfp_prog, mask, 2052314fe9eSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 2062314fe9eSJakub Kicinski BR_CSS_NONE, addr, defer); 2072314fe9eSJakub Kicinski 2082314fe9eSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 2092314fe9eSJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 210d9ae7f2bSJakub Kicinski } 211d9ae7f2bSJakub Kicinski 212d9ae7f2bSJakub Kicinski static void 213d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 214d9ae7f2bSJakub Kicinski { 2152314fe9eSJakub Kicinski emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); 216d9ae7f2bSJakub Kicinski } 217d9ae7f2bSJakub Kicinski 218d9ae7f2bSJakub Kicinski static void 219d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 220d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 221995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 222995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 223d9ae7f2bSJakub Kicinski { 224d9ae7f2bSJakub Kicinski u64 insn; 225d9ae7f2bSJakub Kicinski 226d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 227d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 228d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 229d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 230d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 231d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 232d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 233995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 234995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 235995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 236d9ae7f2bSJakub Kicinski 237d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 238d9ae7f2bSJakub Kicinski } 239d9ae7f2bSJakub Kicinski 240d9ae7f2bSJakub Kicinski static void 241b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 242d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 243d9ae7f2bSJakub Kicinski { 244d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 245d9ae7f2bSJakub Kicinski int err; 246d9ae7f2bSJakub Kicinski 247b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 248d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 249d9ae7f2bSJakub Kicinski return; 250d9ae7f2bSJakub Kicinski } 251d9ae7f2bSJakub Kicinski 252d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 253d9ae7f2bSJakub Kicinski if (err) { 254d9ae7f2bSJakub Kicinski nfp_prog->error = err; 255d9ae7f2bSJakub Kicinski return; 256d9ae7f2bSJakub Kicinski } 257d9ae7f2bSJakub Kicinski 2583239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 2593239e7bbSJiong Wang __emit_immed(nfp_prog, 2603239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 2613239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 2623239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 263d9ae7f2bSJakub Kicinski } 264d9ae7f2bSJakub Kicinski 265d9ae7f2bSJakub Kicinski static void 266d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 267d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 268995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 269995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 270d9ae7f2bSJakub Kicinski { 271d9ae7f2bSJakub Kicinski u64 insn; 272d9ae7f2bSJakub Kicinski 273d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 274d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 275d9ae7f2bSJakub Kicinski return; 276d9ae7f2bSJakub Kicinski } 277d9ae7f2bSJakub Kicinski 278d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 279d9ae7f2bSJakub Kicinski shift = 32 - shift; 280d9ae7f2bSJakub Kicinski 281d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 283d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 284d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 285d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 286d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 287d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 288d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 289d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 290d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 291995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 292995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 293995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 294d9ae7f2bSJakub Kicinski 295d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 296d9ae7f2bSJakub Kicinski } 297d9ae7f2bSJakub Kicinski 298d9ae7f2bSJakub Kicinski static void 299b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 300b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 301d9ae7f2bSJakub Kicinski { 302d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 303d9ae7f2bSJakub Kicinski int err; 304d9ae7f2bSJakub Kicinski 305d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 306d9ae7f2bSJakub Kicinski if (err) { 307d9ae7f2bSJakub Kicinski nfp_prog->error = err; 308d9ae7f2bSJakub Kicinski return; 309d9ae7f2bSJakub Kicinski } 310d9ae7f2bSJakub Kicinski 311d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 312995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 313995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 314d9ae7f2bSJakub Kicinski } 315d9ae7f2bSJakub Kicinski 316d9ae7f2bSJakub Kicinski static void 317d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 318995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 319995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 320d9ae7f2bSJakub Kicinski { 321d9ae7f2bSJakub Kicinski u64 insn; 322d9ae7f2bSJakub Kicinski 323d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 324d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 325d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 326d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 327d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 328d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 329d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 330995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 331995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 332995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 333d9ae7f2bSJakub Kicinski 334d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 335d9ae7f2bSJakub Kicinski } 336d9ae7f2bSJakub Kicinski 337d9ae7f2bSJakub Kicinski static void 338b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 339b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 340d9ae7f2bSJakub Kicinski { 341d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 342d9ae7f2bSJakub Kicinski int err; 343d9ae7f2bSJakub Kicinski 344d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 345d9ae7f2bSJakub Kicinski if (err) { 346d9ae7f2bSJakub Kicinski nfp_prog->error = err; 347d9ae7f2bSJakub Kicinski return; 348d9ae7f2bSJakub Kicinski } 349d9ae7f2bSJakub Kicinski 350d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 351995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 352995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 353d9ae7f2bSJakub Kicinski } 354d9ae7f2bSJakub Kicinski 355d9ae7f2bSJakub Kicinski static void 356d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 357d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 358995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 359995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 360d9ae7f2bSJakub Kicinski { 361d9ae7f2bSJakub Kicinski u64 insn; 362d9ae7f2bSJakub Kicinski 363d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 364d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 365d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 366d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 367d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 368d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 369d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 370d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 371d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 372995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 373995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 374995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 375d9ae7f2bSJakub Kicinski 376d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 377d9ae7f2bSJakub Kicinski } 378d9ae7f2bSJakub Kicinski 379d9ae7f2bSJakub Kicinski static void 380bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 381bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 382d9ae7f2bSJakub Kicinski { 383d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 384d9ae7f2bSJakub Kicinski int err; 385d9ae7f2bSJakub Kicinski 3862de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 3872de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 388d9ae7f2bSJakub Kicinski if (err) { 389d9ae7f2bSJakub Kicinski nfp_prog->error = err; 390d9ae7f2bSJakub Kicinski return; 391d9ae7f2bSJakub Kicinski } 392d9ae7f2bSJakub Kicinski 393d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 394995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 395995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 396d9ae7f2bSJakub Kicinski } 397d9ae7f2bSJakub Kicinski 398d9ae7f2bSJakub Kicinski static void 399b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 400d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 401d9ae7f2bSJakub Kicinski { 402bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 403d9ae7f2bSJakub Kicinski } 404d9ae7f2bSJakub Kicinski 4052df03a50SJakub Kicinski static void 4062df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 4072df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 4082df03a50SJakub Kicinski { 4092df03a50SJakub Kicinski u64 insn; 4102df03a50SJakub Kicinski 4112df03a50SJakub Kicinski insn = OP_LCSR_BASE | 4122df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 4132df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 4142df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 4152df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr) | 4162df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 4172df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 4182df03a50SJakub Kicinski 4192df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 4202df03a50SJakub Kicinski } 4212df03a50SJakub Kicinski 4222df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 4232df03a50SJakub Kicinski { 4242df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 4252df03a50SJakub Kicinski int err; 4262df03a50SJakub Kicinski 4272df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 4282df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 4292df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 4302df03a50SJakub Kicinski * copy the immed to both operands. 4312df03a50SJakub Kicinski */ 4322df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 4332df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 4342df03a50SJakub Kicinski reg.breg = reg.areg; 4352df03a50SJakub Kicinski } else { 4362df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 4372df03a50SJakub Kicinski } 4382df03a50SJakub Kicinski if (err) { 4392df03a50SJakub Kicinski nfp_prog->error = err; 4402df03a50SJakub Kicinski return; 4412df03a50SJakub Kicinski } 4422df03a50SJakub Kicinski 4432df03a50SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr / 4, 4442df03a50SJakub Kicinski false, reg.src_lmextn); 4452df03a50SJakub Kicinski } 4462df03a50SJakub Kicinski 4471c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 4481c03e03fSJakub Kicinski { 4491c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 4501c03e03fSJakub Kicinski } 4511c03e03fSJakub Kicinski 452d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 453d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 454d9ae7f2bSJakub Kicinski { 455d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 456d9ae7f2bSJakub Kicinski *val = imm; 457d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 458d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 459d9ae7f2bSJakub Kicinski *val = imm >> 8; 460d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 461d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 462d9ae7f2bSJakub Kicinski *val = imm >> 16; 463d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 464d9ae7f2bSJakub Kicinski } else { 465d9ae7f2bSJakub Kicinski return false; 466d9ae7f2bSJakub Kicinski } 467d9ae7f2bSJakub Kicinski 468d9ae7f2bSJakub Kicinski return true; 469d9ae7f2bSJakub Kicinski } 470d9ae7f2bSJakub Kicinski 471b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 472d9ae7f2bSJakub Kicinski { 473d9ae7f2bSJakub Kicinski enum immed_shift shift; 474d9ae7f2bSJakub Kicinski u16 val; 475d9ae7f2bSJakub Kicinski 476d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 477d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 478d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 479d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 480d9ae7f2bSJakub Kicinski } else { 481d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 482d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 483d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 484d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 485d9ae7f2bSJakub Kicinski } 486d9ae7f2bSJakub Kicinski } 487d9ae7f2bSJakub Kicinski 48877a3d311SJakub Kicinski static void 48977a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 49077a3d311SJakub Kicinski enum nfp_relo_type relo) 49177a3d311SJakub Kicinski { 49277a3d311SJakub Kicinski if (imm > 0xffff) { 49377a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 49477a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 49577a3d311SJakub Kicinski return; 49677a3d311SJakub Kicinski } 49777a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 49877a3d311SJakub Kicinski 49977a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 50077a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 50177a3d311SJakub Kicinski } 50277a3d311SJakub Kicinski 503d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 504d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 505d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 506d9ae7f2bSJakub Kicinski */ 507b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 508d9ae7f2bSJakub Kicinski { 509d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 510d9ae7f2bSJakub Kicinski return reg_imm(imm); 511d9ae7f2bSJakub Kicinski 512d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 513d9ae7f2bSJakub Kicinski return tmp_reg; 514d9ae7f2bSJakub Kicinski } 515d9ae7f2bSJakub Kicinski 516d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 517d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 518d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 519d9ae7f2bSJakub Kicinski */ 520b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 521d9ae7f2bSJakub Kicinski { 522d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 523d9ae7f2bSJakub Kicinski return reg_imm(imm); 524d9ae7f2bSJakub Kicinski 525d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 526d9ae7f2bSJakub Kicinski return tmp_reg; 527d9ae7f2bSJakub Kicinski } 528d9ae7f2bSJakub Kicinski 529ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 530ff42bb9fSJakub Kicinski { 531ff42bb9fSJakub Kicinski while (count--) 532ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 533ff42bb9fSJakub Kicinski } 534ff42bb9fSJakub Kicinski 535c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 536c000dfb5SJakub Kicinski { 537c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 538c000dfb5SJakub Kicinski } 539c000dfb5SJakub Kicinski 540d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 541d9ae7f2bSJakub Kicinski { 542c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 543d9ae7f2bSJakub Kicinski } 544d9ae7f2bSJakub Kicinski 5459879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 5469879a381SJiong Wang * result to @dst from low end. 5479879a381SJiong Wang */ 5489879a381SJiong Wang static void 5499879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 5509879a381SJiong Wang u8 offset) 5519879a381SJiong Wang { 5529879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 5539879a381SJiong Wang u8 mask = (1 << field_len) - 1; 5549879a381SJiong Wang 5559879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 5569879a381SJiong Wang } 5579879a381SJiong Wang 5583dd43c33SJakub Kicinski static void 5593dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 5603dd43c33SJakub Kicinski swreg *rega, swreg *regb) 5613dd43c33SJakub Kicinski { 5623dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 5633dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 5643dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 5653dd43c33SJakub Kicinski return; 5663dd43c33SJakub Kicinski } 5673dd43c33SJakub Kicinski 5683dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 5693dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 5703dd43c33SJakub Kicinski reg_imm(0)); 5713dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 5723dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 5733dd43c33SJakub Kicinski } 5743dd43c33SJakub Kicinski 5759879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 5769879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 5779879a381SJiong Wang { 5789879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 5799879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 5809879a381SJiong Wang swreg src_base, off; 5813dd43c33SJakub Kicinski bool src_40bit_addr; 5829879a381SJiong Wang unsigned int i; 5839879a381SJiong Wang u8 xfer_num; 5849879a381SJiong Wang 5859879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 5863dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 5879879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 5889879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 5899879a381SJiong Wang 5903dd43c33SJakub Kicinski if (src_40bit_addr) 5913dd43c33SJakub Kicinski addr40_offset(nfp_prog, meta->insn.src_reg, off, &src_base, 5923dd43c33SJakub Kicinski &off); 5933dd43c33SJakub Kicinski 5948c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 5958c900538SJiong Wang if (len > 32) 5968c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 5978c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 5988c900538SJiong Wang 5999879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 6003dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 6013dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 6023dd43c33SJakub Kicinski src_base, off, xfer_num - 1, true, len > 32); 6039879a381SJiong Wang 6049879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 6059879a381SJiong Wang for (i = 0; i < xfer_num; i++) 6069879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 6079879a381SJiong Wang 6089879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 6099879a381SJiong Wang 6109879a381SJiong Wang if (len <= 8) { 6119879a381SJiong Wang /* Use single direct_ref write8. */ 6129879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6139879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 6149879a381SJiong Wang true); 6158c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 6169879a381SJiong Wang /* Use single direct_ref write32. */ 6179879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6189879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 6199879a381SJiong Wang true); 6208c900538SJiong Wang } else if (len <= 32) { 6219879a381SJiong Wang /* Use single indirect_ref write8. */ 6229879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 6239879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 6249879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6259879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6269879a381SJiong Wang len - 1, true); 6278c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 6288c900538SJiong Wang /* Use single indirect_ref write32. */ 6298c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6308c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6318c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6328c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6338c900538SJiong Wang xfer_num - 1, true); 6348c900538SJiong Wang } else if (len <= 40) { 6358c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 6368c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 6378c900538SJiong Wang */ 6388c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6398c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 6408c900538SJiong Wang true); 6418c900538SJiong Wang 6428c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 6438c900538SJiong Wang imm_b(nfp_prog)); 6448c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 6458c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 6468c900538SJiong Wang true); 6478c900538SJiong Wang } else { 6488c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 6498c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 6508c900538SJiong Wang */ 6518c900538SJiong Wang u8 new_off; 6528c900538SJiong Wang 6538c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6548c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 6558c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6568c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6578c900538SJiong Wang xfer_num - 2, true); 6588c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 6598c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 6608c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 6618c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 6628c900538SJiong Wang (len & 0x3) - 1, true); 6639879a381SJiong Wang } 6649879a381SJiong Wang 6659879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 6669879a381SJiong Wang * before and after we do memory copy optimization. 6679879a381SJiong Wang * 6689879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 6699879a381SJiong Wang * need to make sure it is loaded with the value the same as before 6709879a381SJiong Wang * this transformation. 6719879a381SJiong Wang * 6729879a381SJiong Wang * These extra loads could be removed once we have accurate register 6739879a381SJiong Wang * usage information. 6749879a381SJiong Wang */ 6759879a381SJiong Wang if (descending_seq) 6769879a381SJiong Wang xfer_num = 0; 6779879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 6789879a381SJiong Wang xfer_num = xfer_num - 1; 6799879a381SJiong Wang else 6809879a381SJiong Wang xfer_num = xfer_num - 2; 6819879a381SJiong Wang 6829879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 6839879a381SJiong Wang case BPF_B: 6849879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6859879a381SJiong Wang reg_xfer(xfer_num), 1, 6869879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 6879879a381SJiong Wang break; 6889879a381SJiong Wang case BPF_H: 6899879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6909879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 6919879a381SJiong Wang break; 6929879a381SJiong Wang case BPF_W: 6939879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6949879a381SJiong Wang reg_xfer(0)); 6959879a381SJiong Wang break; 6969879a381SJiong Wang case BPF_DW: 6979879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6989879a381SJiong Wang reg_xfer(xfer_num)); 6999879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 7009879a381SJiong Wang reg_xfer(xfer_num + 1)); 7019879a381SJiong Wang break; 7029879a381SJiong Wang } 7039879a381SJiong Wang 7049879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 7059879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 7069879a381SJiong Wang 7079879a381SJiong Wang return 0; 7089879a381SJiong Wang } 7099879a381SJiong Wang 710d9ae7f2bSJakub Kicinski static int 7110a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 712d9ae7f2bSJakub Kicinski { 713d9ae7f2bSJakub Kicinski unsigned int i; 714d9ae7f2bSJakub Kicinski u16 shift, sz; 715d9ae7f2bSJakub Kicinski 716d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 717d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 718d9ae7f2bSJakub Kicinski */ 7190a793977SJakub Kicinski sz = max(size, 4); 720d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 721d9ae7f2bSJakub Kicinski 7220a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 7230a793977SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, true); 7240a793977SJakub Kicinski 7250a793977SJakub Kicinski i = 0; 7260a793977SJakub Kicinski if (shift) 7270a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 7280a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 7290a793977SJakub Kicinski else 7300a793977SJakub Kicinski for (; i * 4 < size; i++) 7310a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7320a793977SJakub Kicinski 7330a793977SJakub Kicinski if (i < 2) 7340a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7350a793977SJakub Kicinski 7360a793977SJakub Kicinski return 0; 7370a793977SJakub Kicinski } 7380a793977SJakub Kicinski 7390a793977SJakub Kicinski static int 7403dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 7413dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 7422ca71441SJakub Kicinski { 7432ca71441SJakub Kicinski unsigned int i; 7442ca71441SJakub Kicinski u8 mask, sz; 7452ca71441SJakub Kicinski 7463dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 7472ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 7482ca71441SJakub Kicinski */ 7492ca71441SJakub Kicinski sz = max(size, 4); 7502ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 7512ca71441SJakub Kicinski 7523dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 7533dd43c33SJakub Kicinski lreg, rreg, sz / 4 - 1, true); 7542ca71441SJakub Kicinski 7552ca71441SJakub Kicinski i = 0; 7562ca71441SJakub Kicinski if (mask) 7572ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 7582ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 7592ca71441SJakub Kicinski else 7602ca71441SJakub Kicinski for (; i * 4 < size; i++) 7612ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7622ca71441SJakub Kicinski 7632ca71441SJakub Kicinski if (i < 2) 7642ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7652ca71441SJakub Kicinski 7662ca71441SJakub Kicinski return 0; 7672ca71441SJakub Kicinski } 7682ca71441SJakub Kicinski 7692ca71441SJakub Kicinski static int 7703dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7713dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7723dd43c33SJakub Kicinski { 7733dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 7743dd43c33SJakub Kicinski size, CMD_MODE_32b); 7753dd43c33SJakub Kicinski } 7763dd43c33SJakub Kicinski 7773dd43c33SJakub Kicinski static int 7783dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7793dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7803dd43c33SJakub Kicinski { 7813dd43c33SJakub Kicinski swreg rega, regb; 7823dd43c33SJakub Kicinski 7833dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 7843dd43c33SJakub Kicinski 7853dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 7863dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 7873dd43c33SJakub Kicinski } 7883dd43c33SJakub Kicinski 7893dd43c33SJakub Kicinski static int 7900a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 7910a793977SJakub Kicinski { 7920a793977SJakub Kicinski swreg tmp_reg; 7930a793977SJakub Kicinski 794d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 795d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 7960a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 7970a793977SJakub Kicinski 798d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 799d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 800d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 801d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 80218e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 803e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8040a793977SJakub Kicinski 805d9ae7f2bSJakub Kicinski /* Load data */ 8060a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 807d9ae7f2bSJakub Kicinski } 808d9ae7f2bSJakub Kicinski 809d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 810d9ae7f2bSJakub Kicinski { 8110a793977SJakub Kicinski swreg tmp_reg; 8120a793977SJakub Kicinski 8130a793977SJakub Kicinski /* Check packet length */ 8140a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 8150a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 816e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8170a793977SJakub Kicinski 8180a793977SJakub Kicinski /* Load data */ 8190a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8200a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 821d9ae7f2bSJakub Kicinski } 822d9ae7f2bSJakub Kicinski 823e663fe38SJakub Kicinski static int 824e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 825e663fe38SJakub Kicinski u8 src_gpr, u8 size) 826e663fe38SJakub Kicinski { 827e663fe38SJakub Kicinski unsigned int i; 828e663fe38SJakub Kicinski 829e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 830e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 831e663fe38SJakub Kicinski 832e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 833e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 834e663fe38SJakub Kicinski 835e663fe38SJakub Kicinski return 0; 836e663fe38SJakub Kicinski } 837e663fe38SJakub Kicinski 838e663fe38SJakub Kicinski static int 839e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 840e663fe38SJakub Kicinski u64 imm, u8 size) 841e663fe38SJakub Kicinski { 842e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 843e663fe38SJakub Kicinski if (size == 8) 844e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 845e663fe38SJakub Kicinski 846e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 847e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 848e663fe38SJakub Kicinski 849e663fe38SJakub Kicinski return 0; 850e663fe38SJakub Kicinski } 851e663fe38SJakub Kicinski 852ee9133a8SJakub Kicinski typedef int 853ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 8542df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8552df03a50SJakub Kicinski bool needs_inc); 856a82b23fbSJakub Kicinski 857a82b23fbSJakub Kicinski static int 858a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 8592df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8602df03a50SJakub Kicinski bool needs_inc) 861a82b23fbSJakub Kicinski { 8622df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 863a82b23fbSJakub Kicinski u32 idx, src_byte; 864a82b23fbSJakub Kicinski enum shf_sc sc; 865a82b23fbSJakub Kicinski swreg reg; 866a82b23fbSJakub Kicinski int shf; 867a82b23fbSJakub Kicinski u8 mask; 868a82b23fbSJakub Kicinski 869a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 870a82b23fbSJakub Kicinski return -EOPNOTSUPP; 871a82b23fbSJakub Kicinski 872a82b23fbSJakub Kicinski idx = off / 4; 873a82b23fbSJakub Kicinski 874a82b23fbSJakub Kicinski /* Move the entire word */ 875a82b23fbSJakub Kicinski if (size == 4) { 8762df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 8772df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 878a82b23fbSJakub Kicinski return 0; 879a82b23fbSJakub Kicinski } 880a82b23fbSJakub Kicinski 8812df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8822df03a50SJakub Kicinski return -EOPNOTSUPP; 8832df03a50SJakub Kicinski 884a82b23fbSJakub Kicinski src_byte = off % 4; 885a82b23fbSJakub Kicinski 886a82b23fbSJakub Kicinski mask = (1 << size) - 1; 887a82b23fbSJakub Kicinski mask <<= dst_byte; 888a82b23fbSJakub Kicinski 889a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 890a82b23fbSJakub Kicinski return -EOPNOTSUPP; 891a82b23fbSJakub Kicinski 892a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 893a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 894a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 895a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 896a82b23fbSJakub Kicinski shf = 32 - shf; 897a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 898a82b23fbSJakub Kicinski } else { 899a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 900a82b23fbSJakub Kicinski } 901a82b23fbSJakub Kicinski 902a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 903a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 904a82b23fbSJakub Kicinski */ 905a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9062df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 907a82b23fbSJakub Kicinski } else { 908a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 9099a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 9109a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 9119a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 9129a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 9139a90c83cSJakub Kicinski */ 9149a90c83cSJakub Kicinski if (first || !new_gpr) 915a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 916a82b23fbSJakub Kicinski } 917a82b23fbSJakub Kicinski 918a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 919a82b23fbSJakub Kicinski 9202df03a50SJakub Kicinski if (should_inc) 9212df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9222df03a50SJakub Kicinski 923a82b23fbSJakub Kicinski return 0; 924a82b23fbSJakub Kicinski } 925ee9133a8SJakub Kicinski 926ee9133a8SJakub Kicinski static int 927ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 9282df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9292df03a50SJakub Kicinski bool needs_inc) 930ee9133a8SJakub Kicinski { 9312df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 932ee9133a8SJakub Kicinski u32 idx, dst_byte; 933ee9133a8SJakub Kicinski enum shf_sc sc; 934ee9133a8SJakub Kicinski swreg reg; 935ee9133a8SJakub Kicinski int shf; 936ee9133a8SJakub Kicinski u8 mask; 937ee9133a8SJakub Kicinski 938ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 939ee9133a8SJakub Kicinski return -EOPNOTSUPP; 940ee9133a8SJakub Kicinski 941ee9133a8SJakub Kicinski idx = off / 4; 942ee9133a8SJakub Kicinski 943ee9133a8SJakub Kicinski /* Move the entire word */ 944ee9133a8SJakub Kicinski if (size == 4) { 9452df03a50SJakub Kicinski wrp_mov(nfp_prog, 9462df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 9472df03a50SJakub Kicinski reg_b(src)); 948ee9133a8SJakub Kicinski return 0; 949ee9133a8SJakub Kicinski } 950ee9133a8SJakub Kicinski 9512df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9522df03a50SJakub Kicinski return -EOPNOTSUPP; 9532df03a50SJakub Kicinski 954ee9133a8SJakub Kicinski dst_byte = off % 4; 955ee9133a8SJakub Kicinski 956ee9133a8SJakub Kicinski mask = (1 << size) - 1; 957ee9133a8SJakub Kicinski mask <<= dst_byte; 958ee9133a8SJakub Kicinski 959ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 960ee9133a8SJakub Kicinski return -EOPNOTSUPP; 961ee9133a8SJakub Kicinski 962ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 963ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 964ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 965ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 966ee9133a8SJakub Kicinski shf = 32 - shf; 967ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 968ee9133a8SJakub Kicinski } else { 969ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 970ee9133a8SJakub Kicinski } 971ee9133a8SJakub Kicinski 972ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 973ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 974ee9133a8SJakub Kicinski */ 975ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9762df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 977ee9133a8SJakub Kicinski } else { 978ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 9799a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 9809a90c83cSJakub Kicinski * the middle location will be overwritten fully. 9819a90c83cSJakub Kicinski */ 9829a90c83cSJakub Kicinski if (first || last) 983ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 984ee9133a8SJakub Kicinski } 985ee9133a8SJakub Kicinski 986ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 987ee9133a8SJakub Kicinski 9889a90c83cSJakub Kicinski if (new_gpr || last) { 989ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 990ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 9912df03a50SJakub Kicinski if (should_inc) 9922df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9939a90c83cSJakub Kicinski } 994ee9133a8SJakub Kicinski 995ee9133a8SJakub Kicinski return 0; 996ee9133a8SJakub Kicinski } 997ee9133a8SJakub Kicinski 998ee9133a8SJakub Kicinski static int 999ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1000b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1001b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1002ee9133a8SJakub Kicinski { 1003d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 10049a90c83cSJakub Kicinski bool first = true, last; 10052df03a50SJakub Kicinski bool needs_inc = false; 10062df03a50SJakub Kicinski swreg stack_off_reg; 1007a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1008ee9133a8SJakub Kicinski u32 gpr_byte = 0; 10092df03a50SJakub Kicinski bool lm3 = true; 1010ee9133a8SJakub Kicinski int ret; 1011ee9133a8SJakub Kicinski 1012b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1013b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1014b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1015b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1016b14157eeSJakub Kicinski */ 1017b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1018b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1019b14157eeSJakub Kicinski 1020b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1021b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1022b14157eeSJakub Kicinski 1023b14157eeSJakub Kicinski needs_inc = true; 1024b14157eeSJakub Kicinski } else if (off + size <= 64) { 10252df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 10262df03a50SJakub Kicinski lm3 = false; 10272df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 10282df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 10292df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 10302df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 10312df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 10322df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 10332df03a50SJakub Kicinski */ 10342df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 10352df03a50SJakub Kicinski stack_imm(nfp_prog)); 10362df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10372df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10382df03a50SJakub Kicinski 10392df03a50SJakub Kicinski off %= 32; 10402df03a50SJakub Kicinski } else { 10412df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 10422df03a50SJakub Kicinski stack_imm(nfp_prog)); 10432df03a50SJakub Kicinski 10442df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10452df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10462df03a50SJakub Kicinski 10472df03a50SJakub Kicinski needs_inc = true; 10482df03a50SJakub Kicinski } 10492df03a50SJakub Kicinski if (lm3) { 10502df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 10512df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 10522df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 10532df03a50SJakub Kicinski } 10542df03a50SJakub Kicinski 1055a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1056a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1057a82b23fbSJakub Kicinski 1058ee9133a8SJakub Kicinski while (size) { 1059ee9133a8SJakub Kicinski u32 slice_end; 1060ee9133a8SJakub Kicinski u8 slice_size; 1061ee9133a8SJakub Kicinski 1062ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1063ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1064ee9133a8SJakub Kicinski slice_size = slice_end - off; 1065ee9133a8SJakub Kicinski 10669a90c83cSJakub Kicinski last = slice_size == size; 10679a90c83cSJakub Kicinski 10682df03a50SJakub Kicinski if (needs_inc) 10692df03a50SJakub Kicinski off %= 4; 10702df03a50SJakub Kicinski 1071a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 10722df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1073ee9133a8SJakub Kicinski if (ret) 1074ee9133a8SJakub Kicinski return ret; 1075ee9133a8SJakub Kicinski 1076a82b23fbSJakub Kicinski prev_gpr = gpr; 10779a90c83cSJakub Kicinski first = false; 10789a90c83cSJakub Kicinski 1079ee9133a8SJakub Kicinski gpr_byte += slice_size; 1080ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1081ee9133a8SJakub Kicinski gpr_byte -= 4; 1082ee9133a8SJakub Kicinski gpr++; 1083ee9133a8SJakub Kicinski } 1084ee9133a8SJakub Kicinski 1085ee9133a8SJakub Kicinski size -= slice_size; 1086ee9133a8SJakub Kicinski off += slice_size; 1087ee9133a8SJakub Kicinski } 1088ee9133a8SJakub Kicinski 1089ee9133a8SJakub Kicinski return 0; 1090ee9133a8SJakub Kicinski } 1091ee9133a8SJakub Kicinski 1092d9ae7f2bSJakub Kicinski static void 1093d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1094d9ae7f2bSJakub Kicinski { 1095b3f868dfSJakub Kicinski swreg tmp_reg; 1096d9ae7f2bSJakub Kicinski 1097d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1098d9ae7f2bSJakub Kicinski if (!imm) 1099d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1100d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1101d9ae7f2bSJakub Kicinski return; 1102d9ae7f2bSJakub Kicinski } 1103d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1104d9ae7f2bSJakub Kicinski if (!~imm) 1105d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1106d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1107d9ae7f2bSJakub Kicinski return; 1108d9ae7f2bSJakub Kicinski } 1109d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1110d9ae7f2bSJakub Kicinski if (!~imm) 1111d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 11125d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1113d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1114d9ae7f2bSJakub Kicinski return; 1115d9ae7f2bSJakub Kicinski } 1116d9ae7f2bSJakub Kicinski 1117d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1118d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1119d9ae7f2bSJakub Kicinski } 1120d9ae7f2bSJakub Kicinski 1121d9ae7f2bSJakub Kicinski static int 1122d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1123d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1124d9ae7f2bSJakub Kicinski { 1125d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1126d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1127d9ae7f2bSJakub Kicinski 1128d9ae7f2bSJakub Kicinski if (skip) { 1129d9ae7f2bSJakub Kicinski meta->skip = true; 1130d9ae7f2bSJakub Kicinski return 0; 1131d9ae7f2bSJakub Kicinski } 1132d9ae7f2bSJakub Kicinski 1133d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1134d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1135d9ae7f2bSJakub Kicinski 1136d9ae7f2bSJakub Kicinski return 0; 1137d9ae7f2bSJakub Kicinski } 1138d9ae7f2bSJakub Kicinski 1139d9ae7f2bSJakub Kicinski static int 1140d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1141d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1142d9ae7f2bSJakub Kicinski { 1143d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1144d9ae7f2bSJakub Kicinski 1145d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1146d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1147d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1148d9ae7f2bSJakub Kicinski 1149d9ae7f2bSJakub Kicinski return 0; 1150d9ae7f2bSJakub Kicinski } 1151d9ae7f2bSJakub Kicinski 1152d9ae7f2bSJakub Kicinski static int 1153d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1154d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1155d9ae7f2bSJakub Kicinski { 1156d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1157d9ae7f2bSJakub Kicinski 1158d9ae7f2bSJakub Kicinski if (skip) { 1159d9ae7f2bSJakub Kicinski meta->skip = true; 1160d9ae7f2bSJakub Kicinski return 0; 1161d9ae7f2bSJakub Kicinski } 1162d9ae7f2bSJakub Kicinski 1163d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1164d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1165d9ae7f2bSJakub Kicinski 1166d9ae7f2bSJakub Kicinski return 0; 1167d9ae7f2bSJakub Kicinski } 1168d9ae7f2bSJakub Kicinski 1169d9ae7f2bSJakub Kicinski static int 1170d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1171d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1172d9ae7f2bSJakub Kicinski { 1173d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1174d9ae7f2bSJakub Kicinski 1175d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1176d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1177d9ae7f2bSJakub Kicinski 1178d9ae7f2bSJakub Kicinski return 0; 1179d9ae7f2bSJakub Kicinski } 1180d9ae7f2bSJakub Kicinski 1181d9ae7f2bSJakub Kicinski static void 1182d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1183d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1184d9ae7f2bSJakub Kicinski { 1185d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1186d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1187d9ae7f2bSJakub Kicinski } 1188d9ae7f2bSJakub Kicinski 1189d9ae7f2bSJakub Kicinski static int 1190d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1191d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1192d9ae7f2bSJakub Kicinski { 1193d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1194d9ae7f2bSJakub Kicinski 1195d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1196d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1197d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1198d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1199d9ae7f2bSJakub Kicinski 1200d9ae7f2bSJakub Kicinski return 0; 1201d9ae7f2bSJakub Kicinski } 1202d9ae7f2bSJakub Kicinski 1203d9ae7f2bSJakub Kicinski static int 1204d9ae7f2bSJakub Kicinski wrp_cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1205d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1206d9ae7f2bSJakub Kicinski { 1207d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1208d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1209d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1210b3f868dfSJakub Kicinski swreg tmp_reg; 1211d9ae7f2bSJakub Kicinski 1212d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1213d9ae7f2bSJakub Kicinski if (!swap) 1214d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), ALU_OP_SUB, tmp_reg); 1215d9ae7f2bSJakub Kicinski else 1216d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, ALU_OP_SUB, reg_a(reg)); 1217d9ae7f2bSJakub Kicinski 1218d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1219d9ae7f2bSJakub Kicinski if (!swap) 1220d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1221d9ae7f2bSJakub Kicinski reg_a(reg + 1), ALU_OP_SUB_C, tmp_reg); 1222d9ae7f2bSJakub Kicinski else 1223d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1224d9ae7f2bSJakub Kicinski tmp_reg, ALU_OP_SUB_C, reg_a(reg + 1)); 1225d9ae7f2bSJakub Kicinski 1226d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1227d9ae7f2bSJakub Kicinski 1228d9ae7f2bSJakub Kicinski return 0; 1229d9ae7f2bSJakub Kicinski } 1230d9ae7f2bSJakub Kicinski 1231d9ae7f2bSJakub Kicinski static int 1232d9ae7f2bSJakub Kicinski wrp_cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1233d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1234d9ae7f2bSJakub Kicinski { 1235d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 123626fa818dSJakub Kicinski u8 areg, breg; 123726fa818dSJakub Kicinski 123826fa818dSJakub Kicinski areg = insn->dst_reg * 2; 123926fa818dSJakub Kicinski breg = insn->src_reg * 2; 1240d9ae7f2bSJakub Kicinski 1241d9ae7f2bSJakub Kicinski if (swap) { 1242d9ae7f2bSJakub Kicinski areg ^= breg; 1243d9ae7f2bSJakub Kicinski breg ^= areg; 1244d9ae7f2bSJakub Kicinski areg ^= breg; 1245d9ae7f2bSJakub Kicinski } 1246d9ae7f2bSJakub Kicinski 1247d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1248d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1249d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 1250d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1251d9ae7f2bSJakub Kicinski 1252d9ae7f2bSJakub Kicinski return 0; 1253d9ae7f2bSJakub Kicinski } 1254d9ae7f2bSJakub Kicinski 12553119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 12563119d1fdSJakub Kicinski { 12573119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 12583119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 12593119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 12603119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 12613119d1fdSJakub Kicinski } 12623119d1fdSJakub Kicinski 12630d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12640d49eaf4SJakub Kicinski { 12650d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 12660d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 12670d49eaf4SJakub Kicinski u32 ret_einval, end; 12680d49eaf4SJakub Kicinski 12690d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 12700d49eaf4SJakub Kicinski 12718231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 12728231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 12738231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 12748231f844SJakub Kicinski return -EINVAL; 12758231f844SJakub Kicinski 12768231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 12778231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 12788231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12798231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12808231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12818231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12828231f844SJakub Kicinski 12838231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12848231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12858231f844SJakub Kicinski 12868231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 12878231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 12888231f844SJakub Kicinski */ 12898231f844SJakub Kicinski 12908231f844SJakub Kicinski return 0; 12918231f844SJakub Kicinski } 12928231f844SJakub Kicinski 12930d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 12940d49eaf4SJakub Kicinski end = ret_einval + 2; 12950d49eaf4SJakub Kicinski 12960d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 12970d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 12980d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 12990d49eaf4SJakub Kicinski 13000d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 13010d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13020d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 13030d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13040d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13050d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 13060d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13070d49eaf4SJakub Kicinski 13080d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 13090d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 13100d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13110d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13120d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 13130d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 13140d49eaf4SJakub Kicinski 13150d49eaf4SJakub Kicinski /* Load the ret code */ 13160d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 13170d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 13180d49eaf4SJakub Kicinski 13190d49eaf4SJakub Kicinski /* Modify the packet metadata */ 13200d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 13210d49eaf4SJakub Kicinski 13220d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 13232314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 13240d49eaf4SJakub Kicinski 13250d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13260d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13270d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 13280d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13290d49eaf4SJakub Kicinski 13300d49eaf4SJakub Kicinski /* return -EINVAL target */ 13310d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 13320d49eaf4SJakub Kicinski return -EINVAL; 13330d49eaf4SJakub Kicinski 13340d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 13350d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 13360d49eaf4SJakub Kicinski 13370d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 13380d49eaf4SJakub Kicinski return -EINVAL; 13390d49eaf4SJakub Kicinski 13400d49eaf4SJakub Kicinski return 0; 13410d49eaf4SJakub Kicinski } 13420d49eaf4SJakub Kicinski 134377a3d311SJakub Kicinski static int 134477a3d311SJakub Kicinski map_lookup_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 134577a3d311SJakub Kicinski { 134677a3d311SJakub Kicinski struct bpf_offloaded_map *offmap; 134777a3d311SJakub Kicinski struct nfp_bpf_map *nfp_map; 134877a3d311SJakub Kicinski bool load_lm_ptr; 134977a3d311SJakub Kicinski u32 ret_tgt; 135077a3d311SJakub Kicinski s64 lm_off; 135177a3d311SJakub Kicinski swreg tid; 135277a3d311SJakub Kicinski 135377a3d311SJakub Kicinski offmap = (struct bpf_offloaded_map *)meta->arg1.map_ptr; 135477a3d311SJakub Kicinski nfp_map = offmap->dev_priv; 135577a3d311SJakub Kicinski 135677a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 135777a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 135877a3d311SJakub Kicinski lm_off += meta->arg2.var_off.value + meta->arg2.off; 135977a3d311SJakub Kicinski load_lm_ptr = meta->arg2_var_off || lm_off; 136077a3d311SJakub Kicinski 136177a3d311SJakub Kicinski /* Set LM0 to start of key */ 136277a3d311SJakub Kicinski if (load_lm_ptr) 136377a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 136477a3d311SJakub Kicinski 136577a3d311SJakub Kicinski /* Load map ID into a register, it should actually fit as an immediate 136677a3d311SJakub Kicinski * but in case it doesn't deal with it here, not in the delay slots. 136777a3d311SJakub Kicinski */ 136877a3d311SJakub Kicinski tid = ur_load_imm_any(nfp_prog, nfp_map->tid, imm_a(nfp_prog)); 136977a3d311SJakub Kicinski 137077a3d311SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + BPF_FUNC_map_lookup_elem, 137177a3d311SJakub Kicinski 2, RELO_BR_HELPER); 137277a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 137377a3d311SJakub Kicinski 137477a3d311SJakub Kicinski /* Load map ID into A0 */ 137577a3d311SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), tid); 137677a3d311SJakub Kicinski 137777a3d311SJakub Kicinski /* Load the return address into B0 */ 137877a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 137977a3d311SJakub Kicinski 138077a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 138177a3d311SJakub Kicinski return -EINVAL; 138277a3d311SJakub Kicinski 138377a3d311SJakub Kicinski /* Reset the LM0 pointer */ 138477a3d311SJakub Kicinski if (!load_lm_ptr) 138577a3d311SJakub Kicinski return 0; 138677a3d311SJakub Kicinski 138777a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 138877a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 138977a3d311SJakub Kicinski 139077a3d311SJakub Kicinski return 0; 139177a3d311SJakub Kicinski } 139277a3d311SJakub Kicinski 1393d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1394d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1395d9ae7f2bSJakub Kicinski { 1396d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1397b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1398b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1399d9ae7f2bSJakub Kicinski 1400b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1401b14157eeSJakub Kicinski swreg stack_depth_reg; 1402b14157eeSJakub Kicinski 1403b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1404b14157eeSJakub Kicinski nfp_prog->stack_depth, 1405b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1406b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1407b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1408b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1409b14157eeSJakub Kicinski } else { 1410b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1411b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1412b14157eeSJakub Kicinski } 1413d9ae7f2bSJakub Kicinski 1414d9ae7f2bSJakub Kicinski return 0; 1415d9ae7f2bSJakub Kicinski } 1416d9ae7f2bSJakub Kicinski 1417d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1418d9ae7f2bSJakub Kicinski { 1419d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1420d9ae7f2bSJakub Kicinski 1421d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1422d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1423d9ae7f2bSJakub Kicinski 1424d9ae7f2bSJakub Kicinski return 0; 1425d9ae7f2bSJakub Kicinski } 1426d9ae7f2bSJakub Kicinski 1427d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1428d9ae7f2bSJakub Kicinski { 1429d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1430d9ae7f2bSJakub Kicinski } 1431d9ae7f2bSJakub Kicinski 1432d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1433d9ae7f2bSJakub Kicinski { 1434d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1435d9ae7f2bSJakub Kicinski } 1436d9ae7f2bSJakub Kicinski 1437d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1438d9ae7f2bSJakub Kicinski { 1439d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1440d9ae7f2bSJakub Kicinski } 1441d9ae7f2bSJakub Kicinski 1442d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1443d9ae7f2bSJakub Kicinski { 1444d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1445d9ae7f2bSJakub Kicinski } 1446d9ae7f2bSJakub Kicinski 1447d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1448d9ae7f2bSJakub Kicinski { 1449d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1450d9ae7f2bSJakub Kicinski } 1451d9ae7f2bSJakub Kicinski 1452d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1453d9ae7f2bSJakub Kicinski { 1454d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1455d9ae7f2bSJakub Kicinski } 1456d9ae7f2bSJakub Kicinski 1457d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1458d9ae7f2bSJakub Kicinski { 1459d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1460d9ae7f2bSJakub Kicinski 1461d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1462d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1463d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1464d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1465d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1466d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1467d9ae7f2bSJakub Kicinski 1468d9ae7f2bSJakub Kicinski return 0; 1469d9ae7f2bSJakub Kicinski } 1470d9ae7f2bSJakub Kicinski 1471d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1472d9ae7f2bSJakub Kicinski { 1473d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1474d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1475d9ae7f2bSJakub Kicinski 1476d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1477d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1478d9ae7f2bSJakub Kicinski 1479d9ae7f2bSJakub Kicinski return 0; 1480d9ae7f2bSJakub Kicinski } 1481d9ae7f2bSJakub Kicinski 1482d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1483d9ae7f2bSJakub Kicinski { 1484d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1485d9ae7f2bSJakub Kicinski 1486d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1487d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1488d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1489d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1490d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1491d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1492d9ae7f2bSJakub Kicinski 1493d9ae7f2bSJakub Kicinski return 0; 1494d9ae7f2bSJakub Kicinski } 1495d9ae7f2bSJakub Kicinski 1496d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1497d9ae7f2bSJakub Kicinski { 1498d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1499d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1500d9ae7f2bSJakub Kicinski 1501d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1502d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1503d9ae7f2bSJakub Kicinski 1504d9ae7f2bSJakub Kicinski return 0; 1505d9ae7f2bSJakub Kicinski } 1506d9ae7f2bSJakub Kicinski 1507254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1508254ef4d7SJiong Wang { 1509254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1510254ef4d7SJiong Wang 1511254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1512254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1513254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1514254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1515254ef4d7SJiong Wang 1516254ef4d7SJiong Wang return 0; 1517254ef4d7SJiong Wang } 1518254ef4d7SJiong Wang 1519d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1520d9ae7f2bSJakub Kicinski { 1521d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15223cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1523d9ae7f2bSJakub Kicinski 15243cae1319SJakub Kicinski if (insn->imm < 32) { 15253cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15263cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15273cae1319SJakub Kicinski SHF_SC_R_DSHF, 32 - insn->imm); 15283cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15293cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15303cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm); 15313cae1319SJakub Kicinski } else if (insn->imm == 32) { 15323cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, dst); 15333cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15343cae1319SJakub Kicinski } else if (insn->imm > 32) { 15353cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15363cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15373cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm - 32); 15383cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15393cae1319SJakub Kicinski } 1540d9ae7f2bSJakub Kicinski 1541d9ae7f2bSJakub Kicinski return 0; 1542d9ae7f2bSJakub Kicinski } 1543d9ae7f2bSJakub Kicinski 1544d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1545d9ae7f2bSJakub Kicinski { 1546d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15473cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1548d9ae7f2bSJakub Kicinski 15493cae1319SJakub Kicinski if (insn->imm < 32) { 15503cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15513cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15523cae1319SJakub Kicinski SHF_SC_R_DSHF, insn->imm); 15533cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15543cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15553cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm); 15563cae1319SJakub Kicinski } else if (insn->imm == 32) { 15573cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst, dst + 1); 15583cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15593cae1319SJakub Kicinski } else if (insn->imm > 32) { 15603cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15613cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15623cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm - 32); 15633cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15643cae1319SJakub Kicinski } 1565d9ae7f2bSJakub Kicinski 1566d9ae7f2bSJakub Kicinski return 0; 1567d9ae7f2bSJakub Kicinski } 1568d9ae7f2bSJakub Kicinski 1569d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1570d9ae7f2bSJakub Kicinski { 1571d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1572d9ae7f2bSJakub Kicinski 1573d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1574d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1575d9ae7f2bSJakub Kicinski 1576d9ae7f2bSJakub Kicinski return 0; 1577d9ae7f2bSJakub Kicinski } 1578d9ae7f2bSJakub Kicinski 1579d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1580d9ae7f2bSJakub Kicinski { 1581d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1582d9ae7f2bSJakub Kicinski 1583d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1584d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1585d9ae7f2bSJakub Kicinski 1586d9ae7f2bSJakub Kicinski return 0; 1587d9ae7f2bSJakub Kicinski } 1588d9ae7f2bSJakub Kicinski 1589d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1590d9ae7f2bSJakub Kicinski { 1591d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1592d9ae7f2bSJakub Kicinski } 1593d9ae7f2bSJakub Kicinski 1594d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1595d9ae7f2bSJakub Kicinski { 1596d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1597d9ae7f2bSJakub Kicinski } 1598d9ae7f2bSJakub Kicinski 1599d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1600d9ae7f2bSJakub Kicinski { 1601d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1602d9ae7f2bSJakub Kicinski } 1603d9ae7f2bSJakub Kicinski 1604d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1605d9ae7f2bSJakub Kicinski { 1606d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1607d9ae7f2bSJakub Kicinski } 1608d9ae7f2bSJakub Kicinski 1609d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1610d9ae7f2bSJakub Kicinski { 1611d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1612d9ae7f2bSJakub Kicinski } 1613d9ae7f2bSJakub Kicinski 1614d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1615d9ae7f2bSJakub Kicinski { 1616d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1617d9ae7f2bSJakub Kicinski } 1618d9ae7f2bSJakub Kicinski 1619d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1620d9ae7f2bSJakub Kicinski { 1621d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1622d9ae7f2bSJakub Kicinski } 1623d9ae7f2bSJakub Kicinski 1624d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1625d9ae7f2bSJakub Kicinski { 1626d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1627d9ae7f2bSJakub Kicinski } 1628d9ae7f2bSJakub Kicinski 1629d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1630d9ae7f2bSJakub Kicinski { 1631d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1632d9ae7f2bSJakub Kicinski } 1633d9ae7f2bSJakub Kicinski 1634d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1635d9ae7f2bSJakub Kicinski { 1636d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1637d9ae7f2bSJakub Kicinski } 1638d9ae7f2bSJakub Kicinski 1639254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1640254ef4d7SJiong Wang { 1641254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1642254ef4d7SJiong Wang 1643254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1644254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1645254ef4d7SJiong Wang 1646254ef4d7SJiong Wang return 0; 1647254ef4d7SJiong Wang } 1648254ef4d7SJiong Wang 1649d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1650d9ae7f2bSJakub Kicinski { 1651d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1652d9ae7f2bSJakub Kicinski 1653d9ae7f2bSJakub Kicinski if (!insn->imm) 1654d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1655d9ae7f2bSJakub Kicinski 1656d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1657d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1658d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1659d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1660d9ae7f2bSJakub Kicinski 1661d9ae7f2bSJakub Kicinski return 0; 1662d9ae7f2bSJakub Kicinski } 1663d9ae7f2bSJakub Kicinski 16643119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16653119d1fdSJakub Kicinski { 16663119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 16673119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 16683119d1fdSJakub Kicinski 16693119d1fdSJakub Kicinski switch (insn->imm) { 16703119d1fdSJakub Kicinski case 16: 16713119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 16723119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 16733119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 16743119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 16753119d1fdSJakub Kicinski 16763119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16773119d1fdSJakub Kicinski break; 16783119d1fdSJakub Kicinski case 32: 16793119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 16803119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16813119d1fdSJakub Kicinski break; 16823119d1fdSJakub Kicinski case 64: 16833119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 16843119d1fdSJakub Kicinski 16853119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 16863119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 16873119d1fdSJakub Kicinski break; 16883119d1fdSJakub Kicinski } 16893119d1fdSJakub Kicinski 16903119d1fdSJakub Kicinski return 0; 16913119d1fdSJakub Kicinski } 16923119d1fdSJakub Kicinski 1693d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1694d9ae7f2bSJakub Kicinski { 16959f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 16969f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 16979f16c8abSJakub Kicinski u8 dst; 16989f16c8abSJakub Kicinski 16999f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 17009f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 17019f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 17029f16c8abSJakub Kicinski 17039f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 17049f16c8abSJakub Kicinski 17059f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 17069f16c8abSJakub Kicinski if (imm_hi == imm_lo) 17079f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 17089f16c8abSJakub Kicinski else 17099f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 1710d9ae7f2bSJakub Kicinski 1711d9ae7f2bSJakub Kicinski return 0; 1712d9ae7f2bSJakub Kicinski } 1713d9ae7f2bSJakub Kicinski 1714d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1715d9ae7f2bSJakub Kicinski { 1716d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1717d9ae7f2bSJakub Kicinski return 0; 1718d9ae7f2bSJakub Kicinski } 1719d9ae7f2bSJakub Kicinski 1720d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1721d9ae7f2bSJakub Kicinski { 1722d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1723d9ae7f2bSJakub Kicinski } 1724d9ae7f2bSJakub Kicinski 1725d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1726d9ae7f2bSJakub Kicinski { 1727d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1728d9ae7f2bSJakub Kicinski } 1729d9ae7f2bSJakub Kicinski 1730d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1731d9ae7f2bSJakub Kicinski { 1732d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1733d9ae7f2bSJakub Kicinski } 1734d9ae7f2bSJakub Kicinski 1735d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1736d9ae7f2bSJakub Kicinski { 1737d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17380a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 1739d9ae7f2bSJakub Kicinski } 1740d9ae7f2bSJakub Kicinski 1741d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1742d9ae7f2bSJakub Kicinski { 1743d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17440a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 1745d9ae7f2bSJakub Kicinski } 1746d9ae7f2bSJakub Kicinski 1747d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1748d9ae7f2bSJakub Kicinski { 1749d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17500a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 1751d9ae7f2bSJakub Kicinski } 1752d9ae7f2bSJakub Kicinski 1753a82b23fbSJakub Kicinski static int 1754a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1755d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1756a82b23fbSJakub Kicinski { 1757d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1758b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 1759b14157eeSJakub Kicinski true, wrp_lmem_load); 1760a82b23fbSJakub Kicinski } 1761a82b23fbSJakub Kicinski 1762943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1763943c57b9SJakub Kicinski u8 size) 1764d9ae7f2bSJakub Kicinski { 1765bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1766bfddbc8aSJakub Kicinski 1767943c57b9SJakub Kicinski switch (meta->insn.off) { 1768c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 1769c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 1770943c57b9SJakub Kicinski return -EOPNOTSUPP; 1771bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 1772bfddbc8aSJakub Kicinski break; 1773c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 1774c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 1775bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1776bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1777bfddbc8aSJakub Kicinski break; 1778c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 1779c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 1780bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1781bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 1782bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1783943c57b9SJakub Kicinski break; 1784943c57b9SJakub Kicinski default: 1785d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1786943c57b9SJakub Kicinski } 1787943c57b9SJakub Kicinski 1788943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1789d9ae7f2bSJakub Kicinski 1790d9ae7f2bSJakub Kicinski return 0; 1791d9ae7f2bSJakub Kicinski } 1792d9ae7f2bSJakub Kicinski 1793943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1794943c57b9SJakub Kicinski u8 size) 1795d9ae7f2bSJakub Kicinski { 1796b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1797d9ae7f2bSJakub Kicinski 1798943c57b9SJakub Kicinski switch (meta->insn.off) { 1799c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 1800c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 1801c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1802c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1803943c57b9SJakub Kicinski break; 1804c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 1805c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 1806c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1807943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 1808943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1809943c57b9SJakub Kicinski break; 1810943c57b9SJakub Kicinski default: 1811943c57b9SJakub Kicinski return -EOPNOTSUPP; 1812943c57b9SJakub Kicinski } 1813d9ae7f2bSJakub Kicinski 1814943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1815d9ae7f2bSJakub Kicinski 1816d9ae7f2bSJakub Kicinski return 0; 1817d9ae7f2bSJakub Kicinski } 1818d9ae7f2bSJakub Kicinski 18192ca71441SJakub Kicinski static int 18202ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18212ca71441SJakub Kicinski unsigned int size) 18222ca71441SJakub Kicinski { 18232ca71441SJakub Kicinski swreg tmp_reg; 18242ca71441SJakub Kicinski 18252ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18262ca71441SJakub Kicinski 18273dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 18283dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18293dd43c33SJakub Kicinski } 18303dd43c33SJakub Kicinski 18313dd43c33SJakub Kicinski static int 18323dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18333dd43c33SJakub Kicinski unsigned int size) 18343dd43c33SJakub Kicinski { 18353dd43c33SJakub Kicinski swreg tmp_reg; 18363dd43c33SJakub Kicinski 18373dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18383dd43c33SJakub Kicinski 18393dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 18403dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18412ca71441SJakub Kicinski } 18422ca71441SJakub Kicinski 18432ca71441SJakub Kicinski static int 18442ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18452ca71441SJakub Kicinski unsigned int size) 18462ca71441SJakub Kicinski { 18479879a381SJiong Wang if (meta->ldst_gather_len) 18489879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 18499879a381SJiong Wang 18502ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 1851012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 18522ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 18532ca71441SJakub Kicinski else 18542ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 18552ca71441SJakub Kicinski } 18562ca71441SJakub Kicinski 18572ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 18582ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 18592ca71441SJakub Kicinski 1860a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 1861d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 1862d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 1863a82b23fbSJakub Kicinski 18643dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 18653dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 18663dd43c33SJakub Kicinski 18672ca71441SJakub Kicinski return -EOPNOTSUPP; 18682ca71441SJakub Kicinski } 18692ca71441SJakub Kicinski 18702ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 18712ca71441SJakub Kicinski { 18722ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 18732ca71441SJakub Kicinski } 18742ca71441SJakub Kicinski 18752ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 18762ca71441SJakub Kicinski { 18772ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 18782ca71441SJakub Kicinski } 18792ca71441SJakub Kicinski 1880d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1881d9ae7f2bSJakub Kicinski { 18822ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 18832ca71441SJakub Kicinski } 18842ca71441SJakub Kicinski 18852ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 18862ca71441SJakub Kicinski { 18872ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 1888d9ae7f2bSJakub Kicinski } 1889d9ae7f2bSJakub Kicinski 1890e663fe38SJakub Kicinski static int 1891e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1892e663fe38SJakub Kicinski unsigned int size) 1893d9ae7f2bSJakub Kicinski { 1894e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1895e663fe38SJakub Kicinski swreg off_reg; 1896e663fe38SJakub Kicinski 1897e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 1898e663fe38SJakub Kicinski 1899e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 1900e663fe38SJakub Kicinski imm, size); 1901e663fe38SJakub Kicinski } 1902e663fe38SJakub Kicinski 1903e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1904e663fe38SJakub Kicinski unsigned int size) 1905e663fe38SJakub Kicinski { 1906e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 1907e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 1908e663fe38SJakub Kicinski 1909d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1910d9ae7f2bSJakub Kicinski } 1911d9ae7f2bSJakub Kicinski 1912e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1913d9ae7f2bSJakub Kicinski { 1914e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 1915e663fe38SJakub Kicinski } 1916e663fe38SJakub Kicinski 1917e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1918e663fe38SJakub Kicinski { 1919e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 1920e663fe38SJakub Kicinski } 1921e663fe38SJakub Kicinski 1922e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1923e663fe38SJakub Kicinski { 1924e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 1925e663fe38SJakub Kicinski } 1926e663fe38SJakub Kicinski 1927e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1928e663fe38SJakub Kicinski { 1929e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 1930e663fe38SJakub Kicinski } 1931e663fe38SJakub Kicinski 1932e663fe38SJakub Kicinski static int 1933e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1934e663fe38SJakub Kicinski unsigned int size) 1935e663fe38SJakub Kicinski { 1936e663fe38SJakub Kicinski swreg off_reg; 1937e663fe38SJakub Kicinski 1938e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 1939e663fe38SJakub Kicinski 1940e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 1941e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 1942e663fe38SJakub Kicinski } 1943e663fe38SJakub Kicinski 1944e663fe38SJakub Kicinski static int 1945ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1946d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1947ee9133a8SJakub Kicinski { 1948d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1949b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 1950b14157eeSJakub Kicinski false, wrp_lmem_store); 1951ee9133a8SJakub Kicinski } 1952ee9133a8SJakub Kicinski 1953ee9133a8SJakub Kicinski static int 1954e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1955e663fe38SJakub Kicinski unsigned int size) 1956e663fe38SJakub Kicinski { 1957e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 1958e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 1959e663fe38SJakub Kicinski 1960ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 1961d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 1962d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 1963ee9133a8SJakub Kicinski 1964d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1965d9ae7f2bSJakub Kicinski } 1966d9ae7f2bSJakub Kicinski 1967e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1968e663fe38SJakub Kicinski { 1969e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 1970e663fe38SJakub Kicinski } 1971e663fe38SJakub Kicinski 1972e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1973e663fe38SJakub Kicinski { 1974e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 1975e663fe38SJakub Kicinski } 1976e663fe38SJakub Kicinski 1977d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1978d9ae7f2bSJakub Kicinski { 1979e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 1980e663fe38SJakub Kicinski } 19812ca71441SJakub Kicinski 1982e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1983e663fe38SJakub Kicinski { 1984e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 1985d9ae7f2bSJakub Kicinski } 1986d9ae7f2bSJakub Kicinski 1987d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1988d9ae7f2bSJakub Kicinski { 1989d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 1990d9ae7f2bSJakub Kicinski 1991d9ae7f2bSJakub Kicinski return 0; 1992d9ae7f2bSJakub Kicinski } 1993d9ae7f2bSJakub Kicinski 1994d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1995d9ae7f2bSJakub Kicinski { 1996d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1997d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1998b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 1999b3f868dfSJakub Kicinski 2000b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2001b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2002d9ae7f2bSJakub Kicinski 2003d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2004d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2005d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2006d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2007d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2008d9ae7f2bSJakub Kicinski } 2009d9ae7f2bSJakub Kicinski 2010d9ae7f2bSJakub Kicinski if (imm >> 32) { 2011d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2012d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2013d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2014d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2015d9ae7f2bSJakub Kicinski } 2016d9ae7f2bSJakub Kicinski 2017d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2018d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2019d9ae7f2bSJakub Kicinski 2020d9ae7f2bSJakub Kicinski return 0; 2021d9ae7f2bSJakub Kicinski } 2022d9ae7f2bSJakub Kicinski 2023d9ae7f2bSJakub Kicinski static int jgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2024d9ae7f2bSJakub Kicinski { 202526fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true); 2026d9ae7f2bSJakub Kicinski } 2027d9ae7f2bSJakub Kicinski 2028d9ae7f2bSJakub Kicinski static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2029d9ae7f2bSJakub Kicinski { 203026fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false); 2031d9ae7f2bSJakub Kicinski } 2032d9ae7f2bSJakub Kicinski 20335dd294d4SDaniel Borkmann static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20345dd294d4SDaniel Borkmann { 203526fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, false); 20365dd294d4SDaniel Borkmann } 20375dd294d4SDaniel Borkmann 20385dd294d4SDaniel Borkmann static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20395dd294d4SDaniel Borkmann { 204026fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); 20415dd294d4SDaniel Borkmann } 20425dd294d4SDaniel Borkmann 2043c087aa8bSNic Viljoen static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2044c087aa8bSNic Viljoen { 2045c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true); 2046c087aa8bSNic Viljoen } 2047c087aa8bSNic Viljoen 2048c087aa8bSNic Viljoen static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2049c087aa8bSNic Viljoen { 2050c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false); 2051c087aa8bSNic Viljoen } 2052c087aa8bSNic Viljoen 2053c087aa8bSNic Viljoen static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2054c087aa8bSNic Viljoen { 2055c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false); 2056c087aa8bSNic Viljoen } 2057c087aa8bSNic Viljoen 2058c087aa8bSNic Viljoen static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2059c087aa8bSNic Viljoen { 2060c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true); 2061c087aa8bSNic Viljoen } 2062c087aa8bSNic Viljoen 2063d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2064d9ae7f2bSJakub Kicinski { 2065d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2066d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2067b3f868dfSJakub Kicinski swreg tmp_reg; 2068d9ae7f2bSJakub Kicinski 2069d9ae7f2bSJakub Kicinski if (!imm) { 2070d9ae7f2bSJakub Kicinski meta->skip = true; 2071d9ae7f2bSJakub Kicinski return 0; 2072d9ae7f2bSJakub Kicinski } 2073d9ae7f2bSJakub Kicinski 2074d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2075d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2076d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2077d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2078d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2079d9ae7f2bSJakub Kicinski } 2080d9ae7f2bSJakub Kicinski 2081d9ae7f2bSJakub Kicinski if (imm >> 32) { 2082d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2083d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2084d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2085d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2086d9ae7f2bSJakub Kicinski } 2087d9ae7f2bSJakub Kicinski 2088d9ae7f2bSJakub Kicinski return 0; 2089d9ae7f2bSJakub Kicinski } 2090d9ae7f2bSJakub Kicinski 2091d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2092d9ae7f2bSJakub Kicinski { 2093d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2094d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2095b3f868dfSJakub Kicinski swreg tmp_reg; 2096d9ae7f2bSJakub Kicinski 2097d9ae7f2bSJakub Kicinski if (!imm) { 2098d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2099d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2100d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 210182837370SJakub Kicinski return 0; 2102d9ae7f2bSJakub Kicinski } 2103d9ae7f2bSJakub Kicinski 2104d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2105d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2106d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2107d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2108d9ae7f2bSJakub Kicinski 2109d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2110d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2111d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2112d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2113d9ae7f2bSJakub Kicinski 2114d9ae7f2bSJakub Kicinski return 0; 2115d9ae7f2bSJakub Kicinski } 2116d9ae7f2bSJakub Kicinski 2117d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2118d9ae7f2bSJakub Kicinski { 2119d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2120d9ae7f2bSJakub Kicinski 2121d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2122d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2123d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2124d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2125d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2126d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2127d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2128d9ae7f2bSJakub Kicinski 2129d9ae7f2bSJakub Kicinski return 0; 2130d9ae7f2bSJakub Kicinski } 2131d9ae7f2bSJakub Kicinski 2132d9ae7f2bSJakub Kicinski static int jgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2133d9ae7f2bSJakub Kicinski { 213426fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true); 2135d9ae7f2bSJakub Kicinski } 2136d9ae7f2bSJakub Kicinski 2137d9ae7f2bSJakub Kicinski static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2138d9ae7f2bSJakub Kicinski { 213926fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false); 2140d9ae7f2bSJakub Kicinski } 2141d9ae7f2bSJakub Kicinski 21425dd294d4SDaniel Borkmann static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21435dd294d4SDaniel Borkmann { 214426fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, false); 21455dd294d4SDaniel Borkmann } 21465dd294d4SDaniel Borkmann 21475dd294d4SDaniel Borkmann static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21485dd294d4SDaniel Borkmann { 214926fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); 21505dd294d4SDaniel Borkmann } 21515dd294d4SDaniel Borkmann 2152c087aa8bSNic Viljoen static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2153c087aa8bSNic Viljoen { 2154c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true); 2155c087aa8bSNic Viljoen } 2156c087aa8bSNic Viljoen 2157c087aa8bSNic Viljoen static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2158c087aa8bSNic Viljoen { 2159c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false); 2160c087aa8bSNic Viljoen } 2161c087aa8bSNic Viljoen 2162c087aa8bSNic Viljoen static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2163c087aa8bSNic Viljoen { 2164c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false); 2165c087aa8bSNic Viljoen } 2166c087aa8bSNic Viljoen 2167c087aa8bSNic Viljoen static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2168c087aa8bSNic Viljoen { 2169c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, true); 2170c087aa8bSNic Viljoen } 2171c087aa8bSNic Viljoen 2172d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2173d9ae7f2bSJakub Kicinski { 2174d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2175d9ae7f2bSJakub Kicinski } 2176d9ae7f2bSJakub Kicinski 2177d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2178d9ae7f2bSJakub Kicinski { 2179d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2180d9ae7f2bSJakub Kicinski } 2181d9ae7f2bSJakub Kicinski 21822cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21832cb230bdSJakub Kicinski { 21842cb230bdSJakub Kicinski switch (meta->insn.imm) { 21850d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 21860d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 218777a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 218877a3d311SJakub Kicinski return map_lookup_stack(nfp_prog, meta); 21892cb230bdSJakub Kicinski default: 21902cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 21912cb230bdSJakub Kicinski return -EOPNOTSUPP; 21922cb230bdSJakub Kicinski } 21932cb230bdSJakub Kicinski } 21942cb230bdSJakub Kicinski 2195d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2196d9ae7f2bSJakub Kicinski { 2197e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2198d9ae7f2bSJakub Kicinski 2199d9ae7f2bSJakub Kicinski return 0; 2200d9ae7f2bSJakub Kicinski } 2201d9ae7f2bSJakub Kicinski 2202d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2203d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2204d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2205d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2206d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2207d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2208d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2209d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2210d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2211d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2212d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2213d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2214d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2215254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2216d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2217d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2218d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2219d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2220d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2221d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2222d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2223d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2224d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2225d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2226d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2227d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2228d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2229d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2230254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2231d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 22323119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2233d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2234d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2235d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2236d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2237d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2238d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2239d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 22402ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 22412ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2242d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 22432ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2244e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2245e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2246d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2247e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2248e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2249e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2250e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2251e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2252d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2253d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 2254d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = jgt_imm, 2255d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, 22565dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, 22575dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, 2258c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_K] = jsgt_imm, 2259c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_K] = jsge_imm, 2260c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_K] = jslt_imm, 2261c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_K] = jsle_imm, 2262d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2263d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2264d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 2265d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = jgt_reg, 2266d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, 22675dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, 22685dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, 2269c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_X] = jsgt_reg, 2270c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_X] = jsge_reg, 2271c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_X] = jslt_reg, 2272c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_X] = jsle_reg, 2273d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2274d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 22752cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2276d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2277d9ae7f2bSJakub Kicinski }; 2278d9ae7f2bSJakub Kicinski 2279d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2280d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2281d9ae7f2bSJakub Kicinski { 22825b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2283854dc87dSJiong Wang u32 idx, br_idx; 2284d9ae7f2bSJakub Kicinski 2285854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2286d9ae7f2bSJakub Kicinski if (meta->skip) 2287d9ae7f2bSJakub Kicinski continue; 22882cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 22892cb230bdSJakub Kicinski continue; 2290d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2291d9ae7f2bSJakub Kicinski continue; 2292d9ae7f2bSJakub Kicinski 22935b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 22942314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 22955b674140SJiong Wang else 22962314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2297854dc87dSJiong Wang 2298d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2299d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2300d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2301d9ae7f2bSJakub Kicinski return -ELOOP; 2302d9ae7f2bSJakub Kicinski } 2303d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 23042314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 23052314fe9eSJakub Kicinski RELO_BR_REL) 2306d9ae7f2bSJakub Kicinski continue; 2307d9ae7f2bSJakub Kicinski 23085b674140SJiong Wang if (!meta->jmp_dst) { 23095b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2310d9ae7f2bSJakub Kicinski return -ELOOP; 2311d9ae7f2bSJakub Kicinski } 2312d9ae7f2bSJakub Kicinski 23135b674140SJiong Wang jmp_dst = meta->jmp_dst; 2314854dc87dSJiong Wang 23155b674140SJiong Wang if (jmp_dst->skip) { 2316d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2317d9ae7f2bSJakub Kicinski return -ELOOP; 2318d9ae7f2bSJakub Kicinski } 2319d9ae7f2bSJakub Kicinski 23202314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2321d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2322d9ae7f2bSJakub Kicinski continue; 23235b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2324d9ae7f2bSJakub Kicinski } 2325d9ae7f2bSJakub Kicinski } 2326d9ae7f2bSJakub Kicinski 2327d9ae7f2bSJakub Kicinski return 0; 2328d9ae7f2bSJakub Kicinski } 2329d9ae7f2bSJakub Kicinski 2330d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2331d9ae7f2bSJakub Kicinski { 233218e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 233318e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 233418e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2335d9ae7f2bSJakub Kicinski } 2336d9ae7f2bSJakub Kicinski 2337d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2338d9ae7f2bSJakub Kicinski { 2339d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2340d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2341d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2342d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2343d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2344d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2345d9ae7f2bSJakub Kicinski * 2346d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2347d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2348d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2349d9ae7f2bSJakub Kicinski * packets up the stack. 2350d9ae7f2bSJakub Kicinski */ 2351d9ae7f2bSJakub Kicinski /* Target for aborts */ 2352d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2353d9ae7f2bSJakub Kicinski 2354e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2355d9ae7f2bSJakub Kicinski 2356c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2357d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2358d9ae7f2bSJakub Kicinski 2359d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2360d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2361d9ae7f2bSJakub Kicinski 2362d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2363d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2364d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2365c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2366d9ae7f2bSJakub Kicinski 2367d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2368d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2369d9ae7f2bSJakub Kicinski 2370d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2371d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2372d9ae7f2bSJakub Kicinski 2373d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2374d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2375d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2376d9ae7f2bSJakub Kicinski 2377d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2378d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2379d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2380d9ae7f2bSJakub Kicinski 2381e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2382d9ae7f2bSJakub Kicinski 2383d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2384d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2385d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2386d9ae7f2bSJakub Kicinski } 2387d9ae7f2bSJakub Kicinski 2388d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2389d9ae7f2bSJakub Kicinski { 2390d9ae7f2bSJakub Kicinski /* XDP return codes: 2391d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2392d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2393d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2394d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2395d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2396d9ae7f2bSJakub Kicinski */ 2397d9ae7f2bSJakub Kicinski /* Target for aborts */ 2398d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2399d9ae7f2bSJakub Kicinski 2400e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2401d9ae7f2bSJakub Kicinski 2402c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2403d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2404d9ae7f2bSJakub Kicinski 2405d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2406d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2407d9ae7f2bSJakub Kicinski 2408d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2409d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2410d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2411d9ae7f2bSJakub Kicinski 2412d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2413d9ae7f2bSJakub Kicinski 2414d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2415d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2416d9ae7f2bSJakub Kicinski 2417d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2418d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2419d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2420d9ae7f2bSJakub Kicinski 2421e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2422d9ae7f2bSJakub Kicinski 2423c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2424d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2425d9ae7f2bSJakub Kicinski } 2426d9ae7f2bSJakub Kicinski 2427d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2428d9ae7f2bSJakub Kicinski { 2429012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2430012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2431d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2432d9ae7f2bSJakub Kicinski break; 2433012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2434d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2435d9ae7f2bSJakub Kicinski break; 2436012bb8a8SJakub Kicinski default: 2437012bb8a8SJakub Kicinski WARN_ON(1); 2438d9ae7f2bSJakub Kicinski } 2439d9ae7f2bSJakub Kicinski } 2440d9ae7f2bSJakub Kicinski 2441d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2442d9ae7f2bSJakub Kicinski { 2443d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2444ff42bb9fSJakub Kicinski int err; 2445d9ae7f2bSJakub Kicinski 2446d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2447d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2448d9ae7f2bSJakub Kicinski return nfp_prog->error; 2449d9ae7f2bSJakub Kicinski 2450d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2451d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2452d9ae7f2bSJakub Kicinski 2453d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2454d9ae7f2bSJakub Kicinski 2455d9ae7f2bSJakub Kicinski if (meta->skip) { 2456d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2457d9ae7f2bSJakub Kicinski continue; 2458d9ae7f2bSJakub Kicinski } 2459d9ae7f2bSJakub Kicinski 2460d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2461d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2462d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2463d9ae7f2bSJakub Kicinski if (!cb) 2464d9ae7f2bSJakub Kicinski return -ENOENT; 2465d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2466d9ae7f2bSJakub Kicinski if (err) 2467d9ae7f2bSJakub Kicinski return err; 2468e8a4796eSJakub Kicinski if (nfp_prog->error) 2469e8a4796eSJakub Kicinski return nfp_prog->error; 2470d9ae7f2bSJakub Kicinski 2471d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2472d9ae7f2bSJakub Kicinski } 2473d9ae7f2bSJakub Kicinski 2474854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 2475854dc87dSJiong Wang 2476d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 2477d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2478d9ae7f2bSJakub Kicinski return nfp_prog->error; 2479d9ae7f2bSJakub Kicinski 2480ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 24811c03e03fSJakub Kicinski if (nfp_prog->error) 24821c03e03fSJakub Kicinski return nfp_prog->error; 24831c03e03fSJakub Kicinski 2484d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 2485d9ae7f2bSJakub Kicinski } 2486d9ae7f2bSJakub Kicinski 2487d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 2488d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 2489d9ae7f2bSJakub Kicinski { 2490d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2491d9ae7f2bSJakub Kicinski 2492d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2493d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 2494d9ae7f2bSJakub Kicinski 2495d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 2496d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 2497d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 2498d9ae7f2bSJakub Kicinski continue; 2499d9ae7f2bSJakub Kicinski 2500d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 2501d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 2502d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 2503d9ae7f2bSJakub Kicinski meta->skip = true; 2504d9ae7f2bSJakub Kicinski 2505d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 2506d9ae7f2bSJakub Kicinski if (!meta->skip) 2507d9ae7f2bSJakub Kicinski return; 2508d9ae7f2bSJakub Kicinski } 2509d9ae7f2bSJakub Kicinski } 2510d9ae7f2bSJakub Kicinski 2511d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 2512d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 2513d9ae7f2bSJakub Kicinski { 2514d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 2515d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 2516d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 2517d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 2518d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 2519d9ae7f2bSJakub Kicinski }; 2520d9ae7f2bSJakub Kicinski 2521d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 2522d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 2523d9ae7f2bSJakub Kicinski 2524d9ae7f2bSJakub Kicinski insn = meta1->insn; 2525d9ae7f2bSJakub Kicinski next = meta2->insn; 2526d9ae7f2bSJakub Kicinski 2527d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2528d9ae7f2bSJakub Kicinski continue; 2529d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2530d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2531d9ae7f2bSJakub Kicinski continue; 2532d9ae7f2bSJakub Kicinski 2533d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 2534d9ae7f2bSJakub Kicinski continue; 2535d9ae7f2bSJakub Kicinski 2536d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 2537d9ae7f2bSJakub Kicinski continue; 2538d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 2539d9ae7f2bSJakub Kicinski continue; 2540d9ae7f2bSJakub Kicinski 2541d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 2542d9ae7f2bSJakub Kicinski continue; 2543d9ae7f2bSJakub Kicinski 25441266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 25451266f5d6SJiong Wang continue; 25461266f5d6SJiong Wang 2547d9ae7f2bSJakub Kicinski meta2->skip = true; 2548d9ae7f2bSJakub Kicinski } 2549d9ae7f2bSJakub Kicinski } 2550d9ae7f2bSJakub Kicinski 2551d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 2552d9ae7f2bSJakub Kicinski { 2553d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 2554d9ae7f2bSJakub Kicinski 2555d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 2556d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 2557d9ae7f2bSJakub Kicinski 2558d9ae7f2bSJakub Kicinski insn = meta1->insn; 2559d9ae7f2bSJakub Kicinski next1 = meta2->insn; 2560d9ae7f2bSJakub Kicinski next2 = meta3->insn; 2561d9ae7f2bSJakub Kicinski 2562d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2563d9ae7f2bSJakub Kicinski continue; 2564d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2565d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2566d9ae7f2bSJakub Kicinski continue; 2567d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 2568d9ae7f2bSJakub Kicinski continue; 2569d9ae7f2bSJakub Kicinski 2570d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 2571d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 2572d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 2573d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 2574d9ae7f2bSJakub Kicinski continue; 2575d9ae7f2bSJakub Kicinski 2576d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 2577d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 2578d9ae7f2bSJakub Kicinski continue; 2579d9ae7f2bSJakub Kicinski 2580d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 2581d9ae7f2bSJakub Kicinski continue; 2582d9ae7f2bSJakub Kicinski 258329fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 258429fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 258529fe46efSJiong Wang continue; 258629fe46efSJiong Wang 2587d9ae7f2bSJakub Kicinski meta2->skip = true; 2588d9ae7f2bSJakub Kicinski meta3->skip = true; 2589d9ae7f2bSJakub Kicinski } 2590d9ae7f2bSJakub Kicinski } 2591d9ae7f2bSJakub Kicinski 25926bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 25936bc7103cSJiong Wang * 25946bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 25956bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 25966bc7103cSJiong Wang * 25976bc7103cSJiong Wang * The destination register of load and source register of store should 25986bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 25996bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 26006bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 26016bc7103cSJiong Wang */ 26026bc7103cSJiong Wang static bool 26036bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 26046bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 26056bc7103cSJiong Wang { 26066bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 26076bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 26086bc7103cSJiong Wang 26096bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 26106bc7103cSJiong Wang return false; 26116bc7103cSJiong Wang 26126bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 26136bc7103cSJiong Wang return false; 26146bc7103cSJiong Wang 26156bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 26166bc7103cSJiong Wang return false; 26176bc7103cSJiong Wang 26186bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 26196bc7103cSJiong Wang return false; 26206bc7103cSJiong Wang 26216bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 26226bc7103cSJiong Wang return false; 26236bc7103cSJiong Wang 26246bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 26256bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 26266bc7103cSJiong Wang return false; 26276bc7103cSJiong Wang 26286bc7103cSJiong Wang return true; 26296bc7103cSJiong Wang } 26306bc7103cSJiong Wang 26316bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 26326bc7103cSJiong Wang * 26336bc7103cSJiong Wang * - Their address base registers are the same. 26346bc7103cSJiong Wang * - Their address offsets are in the same order. 26356bc7103cSJiong Wang * - They operate at the same memory width. 26366bc7103cSJiong Wang * - There is no jump into the middle of them. 26376bc7103cSJiong Wang */ 26386bc7103cSJiong Wang static bool 26396bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 26406bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 26416bc7103cSJiong Wang struct bpf_insn *prev_ld, 26426bc7103cSJiong Wang struct bpf_insn *prev_st) 26436bc7103cSJiong Wang { 26446bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 26456bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 26466bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 26476bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 26486bc7103cSJiong Wang 26496bc7103cSJiong Wang /* This pair is the start pair. */ 26506bc7103cSJiong Wang if (!prev_ld) 26516bc7103cSJiong Wang return true; 26526bc7103cSJiong Wang 26536bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 26546bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 26556bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 26566bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 26576bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 26586bc7103cSJiong Wang prev_ld_off = prev_ld->off; 26596bc7103cSJiong Wang prev_st_off = prev_st->off; 26606bc7103cSJiong Wang 26616bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 26626bc7103cSJiong Wang return false; 26636bc7103cSJiong Wang 26646bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 26656bc7103cSJiong Wang return false; 26666bc7103cSJiong Wang 26676bc7103cSJiong Wang if (curr_size != prev_size) 26686bc7103cSJiong Wang return false; 26696bc7103cSJiong Wang 26706bc7103cSJiong Wang /* There is jump to the head of this pair. */ 26716bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 26726bc7103cSJiong Wang return false; 26736bc7103cSJiong Wang 26746bc7103cSJiong Wang /* Both in ascending order. */ 26756bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 26766bc7103cSJiong Wang prev_st_off + prev_size == st->off) 26776bc7103cSJiong Wang return true; 26786bc7103cSJiong Wang 26796bc7103cSJiong Wang /* Both in descending order. */ 26806bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 26816bc7103cSJiong Wang st->off + curr_size == prev_st_off) 26826bc7103cSJiong Wang return true; 26836bc7103cSJiong Wang 26846bc7103cSJiong Wang return false; 26856bc7103cSJiong Wang } 26866bc7103cSJiong Wang 26876bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 26886bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 26896bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 26906bc7103cSJiong Wang * as an memory copy. 26916bc7103cSJiong Wang */ 26926bc7103cSJiong Wang static bool 26936bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 26946bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 26956bc7103cSJiong Wang { 26966bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 26976bc7103cSJiong Wang 26986bc7103cSJiong Wang /* Different pointer types does not overlap. */ 26996bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 27006bc7103cSJiong Wang return false; 27016bc7103cSJiong Wang 27026bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 27036bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 27046bc7103cSJiong Wang return true; 27056bc7103cSJiong Wang 27066bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 27076bc7103cSJiong Wang * base register. 27086bc7103cSJiong Wang */ 27096bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 27106bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 27116bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 27126bc7103cSJiong Wang 27136bc7103cSJiong Wang /* Ascending order cross. */ 27146bc7103cSJiong Wang if (ld_off > head_ld_off && 27156bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 27166bc7103cSJiong Wang return true; 27176bc7103cSJiong Wang 27186bc7103cSJiong Wang /* Descending order cross. */ 27196bc7103cSJiong Wang if (ld_off < head_ld_off && 27206bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 27216bc7103cSJiong Wang return true; 27226bc7103cSJiong Wang 27236bc7103cSJiong Wang return false; 27246bc7103cSJiong Wang } 27256bc7103cSJiong Wang 27266bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 27276bc7103cSJiong Wang * 27286bc7103cSJiong Wang * load R, [regA + offA] 27296bc7103cSJiong Wang * store [regB + offB], R 27306bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 27316bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 27326bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 27336bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 27346bc7103cSJiong Wang * ... 27356bc7103cSJiong Wang * 27366bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 27376bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 27386bc7103cSJiong Wang */ 27396bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 27406bc7103cSJiong Wang { 27416bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 27426bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 27436bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 27446bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 27456bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 27466bc7103cSJiong Wang u8 count = 0; 27476bc7103cSJiong Wang 27486bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 27496bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 27506bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 27516bc7103cSJiong Wang 27526bc7103cSJiong Wang /* Reset record status if any of the following if true: 27536bc7103cSJiong Wang * - The current insn pair is not load/store. 27546bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 27556bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 27566bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 27576bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 27586bc7103cSJiong Wang * single NFP CPP command can transfer. 27596bc7103cSJiong Wang */ 27606bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 27616bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 27626bc7103cSJiong Wang prev_st) || 27636bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 27646bc7103cSJiong Wang head_st_meta) || 27656bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 27666bc7103cSJiong Wang if (!count) 27676bc7103cSJiong Wang continue; 27686bc7103cSJiong Wang 27696bc7103cSJiong Wang if (count > 1) { 27706bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 27716bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 27726bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 27736bc7103cSJiong Wang 27746bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 27756bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 27766bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 27776bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 27786bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 27796bc7103cSJiong Wang } 27806bc7103cSJiong Wang 27816bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 27826bc7103cSJiong Wang head_st_meta->skip = true; 27836bc7103cSJiong Wang } else { 27846bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 27856bc7103cSJiong Wang } 27866bc7103cSJiong Wang 27876bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 27886bc7103cSJiong Wang * could serve as the new head of the the next chain. 27896bc7103cSJiong Wang */ 27906bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 27916bc7103cSJiong Wang head_ld_meta = meta1; 27926bc7103cSJiong Wang head_st_meta = meta2; 27936bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 27946bc7103cSJiong Wang BPF_LDST_BYTES(ld); 27956bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 27966bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 27976bc7103cSJiong Wang prev_ld = ld; 27986bc7103cSJiong Wang prev_st = st; 27996bc7103cSJiong Wang count = 1; 28006bc7103cSJiong Wang } else { 28016bc7103cSJiong Wang head_ld_meta = NULL; 28026bc7103cSJiong Wang head_st_meta = NULL; 28036bc7103cSJiong Wang prev_ld = NULL; 28046bc7103cSJiong Wang prev_st = NULL; 28056bc7103cSJiong Wang count = 0; 28066bc7103cSJiong Wang } 28076bc7103cSJiong Wang 28086bc7103cSJiong Wang continue; 28096bc7103cSJiong Wang } 28106bc7103cSJiong Wang 28116bc7103cSJiong Wang if (!head_ld_meta) { 28126bc7103cSJiong Wang head_ld_meta = meta1; 28136bc7103cSJiong Wang head_st_meta = meta2; 28146bc7103cSJiong Wang } else { 28156bc7103cSJiong Wang meta1->skip = true; 28166bc7103cSJiong Wang meta2->skip = true; 28176bc7103cSJiong Wang } 28186bc7103cSJiong Wang 28196bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 28206bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 28216bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 28226bc7103cSJiong Wang prev_ld = ld; 28236bc7103cSJiong Wang prev_st = st; 28246bc7103cSJiong Wang count++; 28256bc7103cSJiong Wang } 28266bc7103cSJiong Wang } 28276bc7103cSJiong Wang 2828d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 2829d9ae7f2bSJakub Kicinski { 2830d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 2831d9ae7f2bSJakub Kicinski 2832d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 2833d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 28346bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 2835d9ae7f2bSJakub Kicinski 2836d9ae7f2bSJakub Kicinski return 0; 2837d9ae7f2bSJakub Kicinski } 2838d9ae7f2bSJakub Kicinski 28392314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 2840fd068ddcSJakub Kicinski { 28412314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 2842fd068ddcSJakub Kicinski int i; 2843fd068ddcSJakub Kicinski 28442314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 2845fd068ddcSJakub Kicinski int err; 2846fd068ddcSJakub Kicinski 28472314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 2848fd068ddcSJakub Kicinski if (err) 2849fd068ddcSJakub Kicinski return err; 2850fd068ddcSJakub Kicinski 28512314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 2852fd068ddcSJakub Kicinski } 2853fd068ddcSJakub Kicinski 2854fd068ddcSJakub Kicinski return 0; 2855fd068ddcSJakub Kicinski } 2856fd068ddcSJakub Kicinski 285744a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 285844a12eccSJakub Kicinski { 285944a12eccSJakub Kicinski void *prog; 286044a12eccSJakub Kicinski 286144a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 286244a12eccSJakub Kicinski if (!prog) 286344a12eccSJakub Kicinski return; 286444a12eccSJakub Kicinski 286544a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 286644a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 286744a12eccSJakub Kicinski kvfree(nfp_prog->prog); 286844a12eccSJakub Kicinski nfp_prog->prog = prog; 286944a12eccSJakub Kicinski } 287044a12eccSJakub Kicinski 2871c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 2872d9ae7f2bSJakub Kicinski { 2873d9ae7f2bSJakub Kicinski int ret; 2874d9ae7f2bSJakub Kicinski 2875d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 2876d9ae7f2bSJakub Kicinski if (ret) 28779314c442SJakub Kicinski return ret; 2878d9ae7f2bSJakub Kicinski 2879d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 2880d9ae7f2bSJakub Kicinski if (ret) { 2881d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 2882d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 28839314c442SJakub Kicinski return -EINVAL; 2884d9ae7f2bSJakub Kicinski } 2885d9ae7f2bSJakub Kicinski 288644a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 288744a12eccSJakub Kicinski 28882314fe9eSJakub Kicinski return ret; 2889d9ae7f2bSJakub Kicinski } 28901549921dSJakub Kicinski 28911549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 28921549921dSJakub Kicinski { 28931549921dSJakub Kicinski struct nfp_insn_meta *meta; 28941549921dSJakub Kicinski 28951549921dSJakub Kicinski /* Another pass to record jump information. */ 28961549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 28971549921dSJakub Kicinski u64 code = meta->insn.code; 28981549921dSJakub Kicinski 28991549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 29001549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 29011549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 29021549921dSJakub Kicinski unsigned short dst_indx; 29031549921dSJakub Kicinski 29041549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 29051549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 29061549921dSJakub Kicinski cnt); 29071549921dSJakub Kicinski 29081549921dSJakub Kicinski meta->jmp_dst = dst_meta; 29091549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 29101549921dSJakub Kicinski } 29111549921dSJakub Kicinski } 29121549921dSJakub Kicinski } 29132314fe9eSJakub Kicinski 291474801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 291574801e50SQuentin Monnet { 291674801e50SQuentin Monnet return !!instr_cb[code]; 291774801e50SQuentin Monnet } 291874801e50SQuentin Monnet 29192314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 29202314fe9eSJakub Kicinski { 29212314fe9eSJakub Kicinski unsigned int i; 29222314fe9eSJakub Kicinski u64 *prog; 29232314fe9eSJakub Kicinski int err; 29242314fe9eSJakub Kicinski 29252314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 29262314fe9eSJakub Kicinski GFP_KERNEL); 29272314fe9eSJakub Kicinski if (!prog) 29282314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 29292314fe9eSJakub Kicinski 29302314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 29312314fe9eSJakub Kicinski enum nfp_relo_type special; 293277a3d311SJakub Kicinski u32 val; 29332314fe9eSJakub Kicinski 29342314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 29352314fe9eSJakub Kicinski switch (special) { 29362314fe9eSJakub Kicinski case RELO_NONE: 29372314fe9eSJakub Kicinski continue; 29382314fe9eSJakub Kicinski case RELO_BR_REL: 29392314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 29402314fe9eSJakub Kicinski break; 29412314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 29422314fe9eSJakub Kicinski br_set_offset(&prog[i], 29432314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 29442314fe9eSJakub Kicinski break; 29452314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 29462314fe9eSJakub Kicinski br_set_offset(&prog[i], 29472314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 29482314fe9eSJakub Kicinski break; 29492314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 29502314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 29512314fe9eSJakub Kicinski break; 295277a3d311SJakub Kicinski case RELO_BR_HELPER: 295377a3d311SJakub Kicinski val = br_get_offset(prog[i]); 295477a3d311SJakub Kicinski val -= BR_OFF_RELO; 295577a3d311SJakub Kicinski switch (val) { 295677a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 295777a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 295877a3d311SJakub Kicinski break; 295977a3d311SJakub Kicinski default: 296077a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 296177a3d311SJakub Kicinski val); 296277a3d311SJakub Kicinski err = -EINVAL; 296377a3d311SJakub Kicinski goto err_free_prog; 296477a3d311SJakub Kicinski } 296577a3d311SJakub Kicinski br_set_offset(&prog[i], val); 296677a3d311SJakub Kicinski break; 296777a3d311SJakub Kicinski case RELO_IMMED_REL: 296877a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 296977a3d311SJakub Kicinski break; 29702314fe9eSJakub Kicinski } 29712314fe9eSJakub Kicinski 29722314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 29732314fe9eSJakub Kicinski } 29742314fe9eSJakub Kicinski 29752314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 29762314fe9eSJakub Kicinski if (err) 29772314fe9eSJakub Kicinski goto err_free_prog; 29782314fe9eSJakub Kicinski 29792314fe9eSJakub Kicinski return prog; 29802314fe9eSJakub Kicinski 29812314fe9eSJakub Kicinski err_free_prog: 29822314fe9eSJakub Kicinski kfree(prog); 29832314fe9eSJakub Kicinski return ERR_PTR(err); 29842314fe9eSJakub Kicinski } 2985