1d9ae7f2bSJakub Kicinski /* 2854dc87dSJiong Wang * Copyright (C) 2016-2017 Netronome Systems, Inc. 3d9ae7f2bSJakub Kicinski * 4d9ae7f2bSJakub Kicinski * This software is dual licensed under the GNU General License Version 2, 5d9ae7f2bSJakub Kicinski * June 1991 as shown in the file COPYING in the top-level directory of this 6d9ae7f2bSJakub Kicinski * source tree or the BSD 2-Clause License provided below. You have the 7d9ae7f2bSJakub Kicinski * option to license this software under the complete terms of either license. 8d9ae7f2bSJakub Kicinski * 9d9ae7f2bSJakub Kicinski * The BSD 2-Clause License: 10d9ae7f2bSJakub Kicinski * 11d9ae7f2bSJakub Kicinski * Redistribution and use in source and binary forms, with or 12d9ae7f2bSJakub Kicinski * without modification, are permitted provided that the following 13d9ae7f2bSJakub Kicinski * conditions are met: 14d9ae7f2bSJakub Kicinski * 15d9ae7f2bSJakub Kicinski * 1. Redistributions of source code must retain the above 16d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 17d9ae7f2bSJakub Kicinski * disclaimer. 18d9ae7f2bSJakub Kicinski * 19d9ae7f2bSJakub Kicinski * 2. Redistributions in binary form must reproduce the above 20d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 21d9ae7f2bSJakub Kicinski * disclaimer in the documentation and/or other materials 22d9ae7f2bSJakub Kicinski * provided with the distribution. 23d9ae7f2bSJakub Kicinski * 24d9ae7f2bSJakub Kicinski * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25d9ae7f2bSJakub Kicinski * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26d9ae7f2bSJakub Kicinski * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27d9ae7f2bSJakub Kicinski * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28d9ae7f2bSJakub Kicinski * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29d9ae7f2bSJakub Kicinski * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30d9ae7f2bSJakub Kicinski * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31d9ae7f2bSJakub Kicinski * SOFTWARE. 32d9ae7f2bSJakub Kicinski */ 33d9ae7f2bSJakub Kicinski 34d9ae7f2bSJakub Kicinski #define pr_fmt(fmt) "NFP net bpf: " fmt 35d9ae7f2bSJakub Kicinski 360d49eaf4SJakub Kicinski #include <linux/bug.h> 37d9ae7f2bSJakub Kicinski #include <linux/kernel.h> 38d9ae7f2bSJakub Kicinski #include <linux/bpf.h> 39d9ae7f2bSJakub Kicinski #include <linux/filter.h> 40d9ae7f2bSJakub Kicinski #include <linux/pkt_cls.h> 41d9ae7f2bSJakub Kicinski #include <linux/unistd.h> 42d9ae7f2bSJakub Kicinski 43d9ae7f2bSJakub Kicinski #include "main.h" 44d9ae7f2bSJakub Kicinski #include "../nfp_asm.h" 45d9ae7f2bSJakub Kicinski 46d9ae7f2bSJakub Kicinski /* --- NFP prog --- */ 47d9ae7f2bSJakub Kicinski /* Foreach "multiple" entries macros provide pos and next<n> pointers. 48d9ae7f2bSJakub Kicinski * It's safe to modify the next pointers (but not pos). 49d9ae7f2bSJakub Kicinski */ 50d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk2(nfp_prog, pos, next) \ 51d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 52d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l); \ 53d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 54d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l; \ 55d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 56d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos)) 57d9ae7f2bSJakub Kicinski 58d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk3(nfp_prog, pos, next, next2) \ 59d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 60d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l), \ 61d9ae7f2bSJakub Kicinski next2 = list_next_entry(next, l); \ 62d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 63d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l && \ 64d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next2->l; \ 65d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 66d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos), \ 67d9ae7f2bSJakub Kicinski next2 = nfp_meta_next(next)) 68d9ae7f2bSJakub Kicinski 69d9ae7f2bSJakub Kicinski static bool 70d9ae7f2bSJakub Kicinski nfp_meta_has_prev(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 71d9ae7f2bSJakub Kicinski { 72d9ae7f2bSJakub Kicinski return meta->l.prev != &nfp_prog->insns; 73d9ae7f2bSJakub Kicinski } 74d9ae7f2bSJakub Kicinski 75d9ae7f2bSJakub Kicinski static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn) 76d9ae7f2bSJakub Kicinski { 77d9ae7f2bSJakub Kicinski if (nfp_prog->__prog_alloc_len == nfp_prog->prog_len) { 78d9ae7f2bSJakub Kicinski nfp_prog->error = -ENOSPC; 79d9ae7f2bSJakub Kicinski return; 80d9ae7f2bSJakub Kicinski } 81d9ae7f2bSJakub Kicinski 82d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len] = insn; 83d9ae7f2bSJakub Kicinski nfp_prog->prog_len++; 84d9ae7f2bSJakub Kicinski } 85d9ae7f2bSJakub Kicinski 86d9ae7f2bSJakub Kicinski static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) 87d9ae7f2bSJakub Kicinski { 882314fe9eSJakub Kicinski return nfp_prog->prog_len; 89d9ae7f2bSJakub Kicinski } 90d9ae7f2bSJakub Kicinski 910d49eaf4SJakub Kicinski static bool 920d49eaf4SJakub Kicinski nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off) 930d49eaf4SJakub Kicinski { 940d49eaf4SJakub Kicinski /* If there is a recorded error we may have dropped instructions; 950d49eaf4SJakub Kicinski * that doesn't have to be due to translator bug, and the translation 960d49eaf4SJakub Kicinski * will fail anyway, so just return OK. 970d49eaf4SJakub Kicinski */ 980d49eaf4SJakub Kicinski if (nfp_prog->error) 990d49eaf4SJakub Kicinski return true; 1000d49eaf4SJakub Kicinski return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off); 1010d49eaf4SJakub Kicinski } 1020d49eaf4SJakub Kicinski 103d9ae7f2bSJakub Kicinski /* --- Emitters --- */ 104d9ae7f2bSJakub Kicinski static void 105d9ae7f2bSJakub Kicinski __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 1065468a8b9SJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, bool sync, bool indir) 107d9ae7f2bSJakub Kicinski { 108d9ae7f2bSJakub Kicinski enum cmd_ctx_swap ctx; 109d9ae7f2bSJakub Kicinski u64 insn; 110d9ae7f2bSJakub Kicinski 111d9ae7f2bSJakub Kicinski if (sync) 112d9ae7f2bSJakub Kicinski ctx = CMD_CTX_SWAP; 113d9ae7f2bSJakub Kicinski else 114d9ae7f2bSJakub Kicinski ctx = CMD_CTX_NO_SWAP; 115d9ae7f2bSJakub Kicinski 116d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 117d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 118d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 119d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 120d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 121d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 122d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_SIG, sync) | 123d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 1245468a8b9SJakub Kicinski FIELD_PREP(OP_CMD_INDIR, indir) | 125d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 126d9ae7f2bSJakub Kicinski 127d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 128d9ae7f2bSJakub Kicinski } 129d9ae7f2bSJakub Kicinski 130d9ae7f2bSJakub Kicinski static void 1315468a8b9SJakub Kicinski emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 1325468a8b9SJakub Kicinski swreg lreg, swreg rreg, u8 size, bool sync, bool indir) 133d9ae7f2bSJakub Kicinski { 134d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 135d9ae7f2bSJakub Kicinski int err; 136d9ae7f2bSJakub Kicinski 137d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 138d9ae7f2bSJakub Kicinski if (err) { 139d9ae7f2bSJakub Kicinski nfp_prog->error = err; 140d9ae7f2bSJakub Kicinski return; 141d9ae7f2bSJakub Kicinski } 142d9ae7f2bSJakub Kicinski if (reg.swap) { 143d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 144d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 145d9ae7f2bSJakub Kicinski return; 146d9ae7f2bSJakub Kicinski } 147995e101fSJakub Kicinski if (reg.dst_lmextn || reg.src_lmextn) { 148995e101fSJakub Kicinski pr_err("cmd can't use LMextn\n"); 149995e101fSJakub Kicinski nfp_prog->error = -EFAULT; 150995e101fSJakub Kicinski return; 151995e101fSJakub Kicinski } 152d9ae7f2bSJakub Kicinski 1535468a8b9SJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, sync, 1545468a8b9SJakub Kicinski indir); 1555468a8b9SJakub Kicinski } 1565468a8b9SJakub Kicinski 1575468a8b9SJakub Kicinski static void 1585468a8b9SJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 1595468a8b9SJakub Kicinski swreg lreg, swreg rreg, u8 size, bool sync) 1605468a8b9SJakub Kicinski { 1615468a8b9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, sync, false); 162d9ae7f2bSJakub Kicinski } 163d9ae7f2bSJakub Kicinski 164d9ae7f2bSJakub Kicinski static void 1659879a381SJiong Wang emit_cmd_indir(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 1669879a381SJiong Wang swreg lreg, swreg rreg, u8 size, bool sync) 1679879a381SJiong Wang { 1689879a381SJiong Wang emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, sync, true); 1699879a381SJiong Wang } 1709879a381SJiong Wang 1719879a381SJiong Wang static void 172d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 173d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 174d9ae7f2bSJakub Kicinski { 175d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 176d9ae7f2bSJakub Kicinski u64 insn; 177d9ae7f2bSJakub Kicinski 178d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 179d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 180d9ae7f2bSJakub Kicinski 181d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 182d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 183d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 184d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 185d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 186d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 187d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 188d9ae7f2bSJakub Kicinski 189d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 190d9ae7f2bSJakub Kicinski } 191d9ae7f2bSJakub Kicinski 1922314fe9eSJakub Kicinski static void 1932314fe9eSJakub Kicinski emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, 1942314fe9eSJakub Kicinski enum nfp_relo_type relo) 195d9ae7f2bSJakub Kicinski { 1962314fe9eSJakub Kicinski if (mask == BR_UNC && defer > 2) { 197d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 198d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 199d9ae7f2bSJakub Kicinski return; 200d9ae7f2bSJakub Kicinski } 2012314fe9eSJakub Kicinski 2022314fe9eSJakub Kicinski __emit_br(nfp_prog, mask, 2032314fe9eSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 2042314fe9eSJakub Kicinski BR_CSS_NONE, addr, defer); 2052314fe9eSJakub Kicinski 2062314fe9eSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 2072314fe9eSJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 208d9ae7f2bSJakub Kicinski } 209d9ae7f2bSJakub Kicinski 210d9ae7f2bSJakub Kicinski static void 211d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 212d9ae7f2bSJakub Kicinski { 2132314fe9eSJakub Kicinski emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); 214d9ae7f2bSJakub Kicinski } 215d9ae7f2bSJakub Kicinski 216d9ae7f2bSJakub Kicinski static void 217d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 218d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 219995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 220995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 221d9ae7f2bSJakub Kicinski { 222d9ae7f2bSJakub Kicinski u64 insn; 223d9ae7f2bSJakub Kicinski 224d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 225d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 226d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 227d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 228d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 229d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 230d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 231995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 232995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 233995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 234d9ae7f2bSJakub Kicinski 235d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 236d9ae7f2bSJakub Kicinski } 237d9ae7f2bSJakub Kicinski 238d9ae7f2bSJakub Kicinski static void 239b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 240d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 241d9ae7f2bSJakub Kicinski { 242d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 243d9ae7f2bSJakub Kicinski int err; 244d9ae7f2bSJakub Kicinski 245b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 246d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 247d9ae7f2bSJakub Kicinski return; 248d9ae7f2bSJakub Kicinski } 249d9ae7f2bSJakub Kicinski 250d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 251d9ae7f2bSJakub Kicinski if (err) { 252d9ae7f2bSJakub Kicinski nfp_prog->error = err; 253d9ae7f2bSJakub Kicinski return; 254d9ae7f2bSJakub Kicinski } 255d9ae7f2bSJakub Kicinski 2563239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 2573239e7bbSJiong Wang __emit_immed(nfp_prog, 2583239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 2593239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 2603239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 261d9ae7f2bSJakub Kicinski } 262d9ae7f2bSJakub Kicinski 263d9ae7f2bSJakub Kicinski static void 264d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 265d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 266995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 267995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 268d9ae7f2bSJakub Kicinski { 269d9ae7f2bSJakub Kicinski u64 insn; 270d9ae7f2bSJakub Kicinski 271d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 272d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 273d9ae7f2bSJakub Kicinski return; 274d9ae7f2bSJakub Kicinski } 275d9ae7f2bSJakub Kicinski 276d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 277d9ae7f2bSJakub Kicinski shift = 32 - shift; 278d9ae7f2bSJakub Kicinski 279d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 280d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 281d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 283d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 284d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 285d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 286d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 287d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 288d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 289995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 290995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 291995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 292d9ae7f2bSJakub Kicinski 293d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 294d9ae7f2bSJakub Kicinski } 295d9ae7f2bSJakub Kicinski 296d9ae7f2bSJakub Kicinski static void 297b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 298b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 299d9ae7f2bSJakub Kicinski { 300d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 301d9ae7f2bSJakub Kicinski int err; 302d9ae7f2bSJakub Kicinski 303d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 304d9ae7f2bSJakub Kicinski if (err) { 305d9ae7f2bSJakub Kicinski nfp_prog->error = err; 306d9ae7f2bSJakub Kicinski return; 307d9ae7f2bSJakub Kicinski } 308d9ae7f2bSJakub Kicinski 309d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 310995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 311995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 312d9ae7f2bSJakub Kicinski } 313d9ae7f2bSJakub Kicinski 314d9ae7f2bSJakub Kicinski static void 315d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 316995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 317995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 318d9ae7f2bSJakub Kicinski { 319d9ae7f2bSJakub Kicinski u64 insn; 320d9ae7f2bSJakub Kicinski 321d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 322d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 323d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 324d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 325d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 326d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 327d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 328995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 329995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 330995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 331d9ae7f2bSJakub Kicinski 332d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 333d9ae7f2bSJakub Kicinski } 334d9ae7f2bSJakub Kicinski 335d9ae7f2bSJakub Kicinski static void 336b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 337b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 338d9ae7f2bSJakub Kicinski { 339d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 340d9ae7f2bSJakub Kicinski int err; 341d9ae7f2bSJakub Kicinski 342d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 343d9ae7f2bSJakub Kicinski if (err) { 344d9ae7f2bSJakub Kicinski nfp_prog->error = err; 345d9ae7f2bSJakub Kicinski return; 346d9ae7f2bSJakub Kicinski } 347d9ae7f2bSJakub Kicinski 348d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 349995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 350995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 351d9ae7f2bSJakub Kicinski } 352d9ae7f2bSJakub Kicinski 353d9ae7f2bSJakub Kicinski static void 354d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 355d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 356995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 357995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 358d9ae7f2bSJakub Kicinski { 359d9ae7f2bSJakub Kicinski u64 insn; 360d9ae7f2bSJakub Kicinski 361d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 362d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 363d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 364d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 365d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 366d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 367d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 368d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 369d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 370995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 371995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 372995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 373d9ae7f2bSJakub Kicinski 374d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 375d9ae7f2bSJakub Kicinski } 376d9ae7f2bSJakub Kicinski 377d9ae7f2bSJakub Kicinski static void 378bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 379bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 380d9ae7f2bSJakub Kicinski { 381d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 382d9ae7f2bSJakub Kicinski int err; 383d9ae7f2bSJakub Kicinski 3842de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 3852de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 386d9ae7f2bSJakub Kicinski if (err) { 387d9ae7f2bSJakub Kicinski nfp_prog->error = err; 388d9ae7f2bSJakub Kicinski return; 389d9ae7f2bSJakub Kicinski } 390d9ae7f2bSJakub Kicinski 391d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 392995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 393995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 394d9ae7f2bSJakub Kicinski } 395d9ae7f2bSJakub Kicinski 396d9ae7f2bSJakub Kicinski static void 397b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 398d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 399d9ae7f2bSJakub Kicinski { 400bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 401d9ae7f2bSJakub Kicinski } 402d9ae7f2bSJakub Kicinski 4032df03a50SJakub Kicinski static void 4042df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 4052df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 4062df03a50SJakub Kicinski { 4072df03a50SJakub Kicinski u64 insn; 4082df03a50SJakub Kicinski 4092df03a50SJakub Kicinski insn = OP_LCSR_BASE | 4102df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 4112df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 4122df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 4132df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr) | 4142df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 4152df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 4162df03a50SJakub Kicinski 4172df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 4182df03a50SJakub Kicinski } 4192df03a50SJakub Kicinski 4202df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 4212df03a50SJakub Kicinski { 4222df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 4232df03a50SJakub Kicinski int err; 4242df03a50SJakub Kicinski 4252df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 4262df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 4272df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 4282df03a50SJakub Kicinski * copy the immed to both operands. 4292df03a50SJakub Kicinski */ 4302df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 4312df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 4322df03a50SJakub Kicinski reg.breg = reg.areg; 4332df03a50SJakub Kicinski } else { 4342df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 4352df03a50SJakub Kicinski } 4362df03a50SJakub Kicinski if (err) { 4372df03a50SJakub Kicinski nfp_prog->error = err; 4382df03a50SJakub Kicinski return; 4392df03a50SJakub Kicinski } 4402df03a50SJakub Kicinski 4412df03a50SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr / 4, 4422df03a50SJakub Kicinski false, reg.src_lmextn); 4432df03a50SJakub Kicinski } 4442df03a50SJakub Kicinski 4451c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 4461c03e03fSJakub Kicinski { 4471c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 4481c03e03fSJakub Kicinski } 4491c03e03fSJakub Kicinski 450d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 451d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 452d9ae7f2bSJakub Kicinski { 453d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 454d9ae7f2bSJakub Kicinski *val = imm; 455d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 456d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 457d9ae7f2bSJakub Kicinski *val = imm >> 8; 458d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 459d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 460d9ae7f2bSJakub Kicinski *val = imm >> 16; 461d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 462d9ae7f2bSJakub Kicinski } else { 463d9ae7f2bSJakub Kicinski return false; 464d9ae7f2bSJakub Kicinski } 465d9ae7f2bSJakub Kicinski 466d9ae7f2bSJakub Kicinski return true; 467d9ae7f2bSJakub Kicinski } 468d9ae7f2bSJakub Kicinski 469b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 470d9ae7f2bSJakub Kicinski { 471d9ae7f2bSJakub Kicinski enum immed_shift shift; 472d9ae7f2bSJakub Kicinski u16 val; 473d9ae7f2bSJakub Kicinski 474d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 475d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 476d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 477d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 478d9ae7f2bSJakub Kicinski } else { 479d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 480d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 481d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 482d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 483d9ae7f2bSJakub Kicinski } 484d9ae7f2bSJakub Kicinski } 485d9ae7f2bSJakub Kicinski 48677a3d311SJakub Kicinski static void 48777a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 48877a3d311SJakub Kicinski enum nfp_relo_type relo) 48977a3d311SJakub Kicinski { 49077a3d311SJakub Kicinski if (imm > 0xffff) { 49177a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 49277a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 49377a3d311SJakub Kicinski return; 49477a3d311SJakub Kicinski } 49577a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 49677a3d311SJakub Kicinski 49777a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 49877a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 49977a3d311SJakub Kicinski } 50077a3d311SJakub Kicinski 501d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 502d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 503d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 504d9ae7f2bSJakub Kicinski */ 505b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 506d9ae7f2bSJakub Kicinski { 507d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 508d9ae7f2bSJakub Kicinski return reg_imm(imm); 509d9ae7f2bSJakub Kicinski 510d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 511d9ae7f2bSJakub Kicinski return tmp_reg; 512d9ae7f2bSJakub Kicinski } 513d9ae7f2bSJakub Kicinski 514d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 515d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 516d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 517d9ae7f2bSJakub Kicinski */ 518b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 519d9ae7f2bSJakub Kicinski { 520d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 521d9ae7f2bSJakub Kicinski return reg_imm(imm); 522d9ae7f2bSJakub Kicinski 523d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 524d9ae7f2bSJakub Kicinski return tmp_reg; 525d9ae7f2bSJakub Kicinski } 526d9ae7f2bSJakub Kicinski 527ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 528ff42bb9fSJakub Kicinski { 529ff42bb9fSJakub Kicinski while (count--) 530ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 531ff42bb9fSJakub Kicinski } 532ff42bb9fSJakub Kicinski 533c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 534c000dfb5SJakub Kicinski { 535c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 536c000dfb5SJakub Kicinski } 537c000dfb5SJakub Kicinski 538d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 539d9ae7f2bSJakub Kicinski { 540c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 541d9ae7f2bSJakub Kicinski } 542d9ae7f2bSJakub Kicinski 5439879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 5449879a381SJiong Wang * result to @dst from low end. 5459879a381SJiong Wang */ 5469879a381SJiong Wang static void 5479879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 5489879a381SJiong Wang u8 offset) 5499879a381SJiong Wang { 5509879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 5519879a381SJiong Wang u8 mask = (1 << field_len) - 1; 5529879a381SJiong Wang 5539879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 5549879a381SJiong Wang } 5559879a381SJiong Wang 55691ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 55791ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 55891ff69e8SJiong Wang */ 55991ff69e8SJiong Wang static void 56091ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 56191ff69e8SJiong Wang u8 field_len, u8 offset) 56291ff69e8SJiong Wang { 56391ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 56491ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 56591ff69e8SJiong Wang 56691ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 56791ff69e8SJiong Wang } 56891ff69e8SJiong Wang 5693dd43c33SJakub Kicinski static void 5703dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 5713dd43c33SJakub Kicinski swreg *rega, swreg *regb) 5723dd43c33SJakub Kicinski { 5733dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 5743dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 5753dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 5763dd43c33SJakub Kicinski return; 5773dd43c33SJakub Kicinski } 5783dd43c33SJakub Kicinski 5793dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 5803dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 5813dd43c33SJakub Kicinski reg_imm(0)); 5823dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 5833dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 5843dd43c33SJakub Kicinski } 5853dd43c33SJakub Kicinski 5869879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 5879879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 5889879a381SJiong Wang { 5899879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 5909879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 5919879a381SJiong Wang swreg src_base, off; 5923dd43c33SJakub Kicinski bool src_40bit_addr; 5939879a381SJiong Wang unsigned int i; 5949879a381SJiong Wang u8 xfer_num; 5959879a381SJiong Wang 5969879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 5973dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 5989879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 5999879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 6009879a381SJiong Wang 6013dd43c33SJakub Kicinski if (src_40bit_addr) 6023dd43c33SJakub Kicinski addr40_offset(nfp_prog, meta->insn.src_reg, off, &src_base, 6033dd43c33SJakub Kicinski &off); 6043dd43c33SJakub Kicinski 6058c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 6068c900538SJiong Wang if (len > 32) 6078c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6088c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6098c900538SJiong Wang 6109879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 6113dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 6123dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 6133dd43c33SJakub Kicinski src_base, off, xfer_num - 1, true, len > 32); 6149879a381SJiong Wang 6159879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 6169879a381SJiong Wang for (i = 0; i < xfer_num; i++) 6179879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 6189879a381SJiong Wang 6199879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 6209879a381SJiong Wang 6219879a381SJiong Wang if (len <= 8) { 6229879a381SJiong Wang /* Use single direct_ref write8. */ 6239879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6249879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 6259879a381SJiong Wang true); 6268c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 6279879a381SJiong Wang /* Use single direct_ref write32. */ 6289879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6299879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 6309879a381SJiong Wang true); 6318c900538SJiong Wang } else if (len <= 32) { 6329879a381SJiong Wang /* Use single indirect_ref write8. */ 6339879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 6349879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 6359879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6369879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6379879a381SJiong Wang len - 1, true); 6388c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 6398c900538SJiong Wang /* Use single indirect_ref write32. */ 6408c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6418c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6428c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6438c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6448c900538SJiong Wang xfer_num - 1, true); 6458c900538SJiong Wang } else if (len <= 40) { 6468c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 6478c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 6488c900538SJiong Wang */ 6498c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6508c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 6518c900538SJiong Wang true); 6528c900538SJiong Wang 6538c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 6548c900538SJiong Wang imm_b(nfp_prog)); 6558c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 6568c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 6578c900538SJiong Wang true); 6588c900538SJiong Wang } else { 6598c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 6608c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 6618c900538SJiong Wang */ 6628c900538SJiong Wang u8 new_off; 6638c900538SJiong Wang 6648c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6658c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 6668c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6678c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6688c900538SJiong Wang xfer_num - 2, true); 6698c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 6708c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 6718c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 6728c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 6738c900538SJiong Wang (len & 0x3) - 1, true); 6749879a381SJiong Wang } 6759879a381SJiong Wang 6769879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 6779879a381SJiong Wang * before and after we do memory copy optimization. 6789879a381SJiong Wang * 6799879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 6809879a381SJiong Wang * need to make sure it is loaded with the value the same as before 6819879a381SJiong Wang * this transformation. 6829879a381SJiong Wang * 6839879a381SJiong Wang * These extra loads could be removed once we have accurate register 6849879a381SJiong Wang * usage information. 6859879a381SJiong Wang */ 6869879a381SJiong Wang if (descending_seq) 6879879a381SJiong Wang xfer_num = 0; 6889879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 6899879a381SJiong Wang xfer_num = xfer_num - 1; 6909879a381SJiong Wang else 6919879a381SJiong Wang xfer_num = xfer_num - 2; 6929879a381SJiong Wang 6939879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 6949879a381SJiong Wang case BPF_B: 6959879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6969879a381SJiong Wang reg_xfer(xfer_num), 1, 6979879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 6989879a381SJiong Wang break; 6999879a381SJiong Wang case BPF_H: 7009879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7019879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 7029879a381SJiong Wang break; 7039879a381SJiong Wang case BPF_W: 7049879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7059879a381SJiong Wang reg_xfer(0)); 7069879a381SJiong Wang break; 7079879a381SJiong Wang case BPF_DW: 7089879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7099879a381SJiong Wang reg_xfer(xfer_num)); 7109879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 7119879a381SJiong Wang reg_xfer(xfer_num + 1)); 7129879a381SJiong Wang break; 7139879a381SJiong Wang } 7149879a381SJiong Wang 7159879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 7169879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 7179879a381SJiong Wang 7189879a381SJiong Wang return 0; 7199879a381SJiong Wang } 7209879a381SJiong Wang 721d9ae7f2bSJakub Kicinski static int 7220a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 723d9ae7f2bSJakub Kicinski { 724d9ae7f2bSJakub Kicinski unsigned int i; 725d9ae7f2bSJakub Kicinski u16 shift, sz; 726d9ae7f2bSJakub Kicinski 727d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 728d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 729d9ae7f2bSJakub Kicinski */ 7300a793977SJakub Kicinski sz = max(size, 4); 731d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 732d9ae7f2bSJakub Kicinski 7330a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 7340a793977SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, true); 7350a793977SJakub Kicinski 7360a793977SJakub Kicinski i = 0; 7370a793977SJakub Kicinski if (shift) 7380a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 7390a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 7400a793977SJakub Kicinski else 7410a793977SJakub Kicinski for (; i * 4 < size; i++) 7420a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7430a793977SJakub Kicinski 7440a793977SJakub Kicinski if (i < 2) 7450a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7460a793977SJakub Kicinski 7470a793977SJakub Kicinski return 0; 7480a793977SJakub Kicinski } 7490a793977SJakub Kicinski 7500a793977SJakub Kicinski static int 7513dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 7523dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 7532ca71441SJakub Kicinski { 7542ca71441SJakub Kicinski unsigned int i; 7552ca71441SJakub Kicinski u8 mask, sz; 7562ca71441SJakub Kicinski 7573dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 7582ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 7592ca71441SJakub Kicinski */ 7602ca71441SJakub Kicinski sz = max(size, 4); 7612ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 7622ca71441SJakub Kicinski 7633dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 7643dd43c33SJakub Kicinski lreg, rreg, sz / 4 - 1, true); 7652ca71441SJakub Kicinski 7662ca71441SJakub Kicinski i = 0; 7672ca71441SJakub Kicinski if (mask) 7682ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 7692ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 7702ca71441SJakub Kicinski else 7712ca71441SJakub Kicinski for (; i * 4 < size; i++) 7722ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7732ca71441SJakub Kicinski 7742ca71441SJakub Kicinski if (i < 2) 7752ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7762ca71441SJakub Kicinski 7772ca71441SJakub Kicinski return 0; 7782ca71441SJakub Kicinski } 7792ca71441SJakub Kicinski 7802ca71441SJakub Kicinski static int 7813dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7823dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7833dd43c33SJakub Kicinski { 7843dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 7853dd43c33SJakub Kicinski size, CMD_MODE_32b); 7863dd43c33SJakub Kicinski } 7873dd43c33SJakub Kicinski 7883dd43c33SJakub Kicinski static int 7893dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7903dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7913dd43c33SJakub Kicinski { 7923dd43c33SJakub Kicinski swreg rega, regb; 7933dd43c33SJakub Kicinski 7943dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 7953dd43c33SJakub Kicinski 7963dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 7973dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 7983dd43c33SJakub Kicinski } 7993dd43c33SJakub Kicinski 8003dd43c33SJakub Kicinski static int 8010a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 8020a793977SJakub Kicinski { 8030a793977SJakub Kicinski swreg tmp_reg; 8040a793977SJakub Kicinski 805d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 806d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8070a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 8080a793977SJakub Kicinski 809d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 810d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 811d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 812d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 81318e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 814e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8150a793977SJakub Kicinski 816d9ae7f2bSJakub Kicinski /* Load data */ 8170a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 818d9ae7f2bSJakub Kicinski } 819d9ae7f2bSJakub Kicinski 820d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 821d9ae7f2bSJakub Kicinski { 8220a793977SJakub Kicinski swreg tmp_reg; 8230a793977SJakub Kicinski 8240a793977SJakub Kicinski /* Check packet length */ 8250a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 8260a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 827e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8280a793977SJakub Kicinski 8290a793977SJakub Kicinski /* Load data */ 8300a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8310a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 832d9ae7f2bSJakub Kicinski } 833d9ae7f2bSJakub Kicinski 834e663fe38SJakub Kicinski static int 835e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 836e663fe38SJakub Kicinski u8 src_gpr, u8 size) 837e663fe38SJakub Kicinski { 838e663fe38SJakub Kicinski unsigned int i; 839e663fe38SJakub Kicinski 840e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 841e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 842e663fe38SJakub Kicinski 843e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 844e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 845e663fe38SJakub Kicinski 846e663fe38SJakub Kicinski return 0; 847e663fe38SJakub Kicinski } 848e663fe38SJakub Kicinski 849e663fe38SJakub Kicinski static int 850e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 851e663fe38SJakub Kicinski u64 imm, u8 size) 852e663fe38SJakub Kicinski { 853e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 854e663fe38SJakub Kicinski if (size == 8) 855e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 856e663fe38SJakub Kicinski 857e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 858e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 859e663fe38SJakub Kicinski 860e663fe38SJakub Kicinski return 0; 861e663fe38SJakub Kicinski } 862e663fe38SJakub Kicinski 863ee9133a8SJakub Kicinski typedef int 864ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 8652df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8662df03a50SJakub Kicinski bool needs_inc); 867a82b23fbSJakub Kicinski 868a82b23fbSJakub Kicinski static int 869a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 8702df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8712df03a50SJakub Kicinski bool needs_inc) 872a82b23fbSJakub Kicinski { 8732df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 874a82b23fbSJakub Kicinski u32 idx, src_byte; 875a82b23fbSJakub Kicinski enum shf_sc sc; 876a82b23fbSJakub Kicinski swreg reg; 877a82b23fbSJakub Kicinski int shf; 878a82b23fbSJakub Kicinski u8 mask; 879a82b23fbSJakub Kicinski 880a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 881a82b23fbSJakub Kicinski return -EOPNOTSUPP; 882a82b23fbSJakub Kicinski 883a82b23fbSJakub Kicinski idx = off / 4; 884a82b23fbSJakub Kicinski 885a82b23fbSJakub Kicinski /* Move the entire word */ 886a82b23fbSJakub Kicinski if (size == 4) { 8872df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 8882df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 889a82b23fbSJakub Kicinski return 0; 890a82b23fbSJakub Kicinski } 891a82b23fbSJakub Kicinski 8922df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8932df03a50SJakub Kicinski return -EOPNOTSUPP; 8942df03a50SJakub Kicinski 895a82b23fbSJakub Kicinski src_byte = off % 4; 896a82b23fbSJakub Kicinski 897a82b23fbSJakub Kicinski mask = (1 << size) - 1; 898a82b23fbSJakub Kicinski mask <<= dst_byte; 899a82b23fbSJakub Kicinski 900a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 901a82b23fbSJakub Kicinski return -EOPNOTSUPP; 902a82b23fbSJakub Kicinski 903a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 904a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 905a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 906a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 907a82b23fbSJakub Kicinski shf = 32 - shf; 908a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 909a82b23fbSJakub Kicinski } else { 910a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 911a82b23fbSJakub Kicinski } 912a82b23fbSJakub Kicinski 913a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 914a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 915a82b23fbSJakub Kicinski */ 916a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9172df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 918a82b23fbSJakub Kicinski } else { 919a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 9209a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 9219a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 9229a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 9239a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 9249a90c83cSJakub Kicinski */ 9259a90c83cSJakub Kicinski if (first || !new_gpr) 926a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 927a82b23fbSJakub Kicinski } 928a82b23fbSJakub Kicinski 929a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 930a82b23fbSJakub Kicinski 9312df03a50SJakub Kicinski if (should_inc) 9322df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9332df03a50SJakub Kicinski 934a82b23fbSJakub Kicinski return 0; 935a82b23fbSJakub Kicinski } 936ee9133a8SJakub Kicinski 937ee9133a8SJakub Kicinski static int 938ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 9392df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9402df03a50SJakub Kicinski bool needs_inc) 941ee9133a8SJakub Kicinski { 9422df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 943ee9133a8SJakub Kicinski u32 idx, dst_byte; 944ee9133a8SJakub Kicinski enum shf_sc sc; 945ee9133a8SJakub Kicinski swreg reg; 946ee9133a8SJakub Kicinski int shf; 947ee9133a8SJakub Kicinski u8 mask; 948ee9133a8SJakub Kicinski 949ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 950ee9133a8SJakub Kicinski return -EOPNOTSUPP; 951ee9133a8SJakub Kicinski 952ee9133a8SJakub Kicinski idx = off / 4; 953ee9133a8SJakub Kicinski 954ee9133a8SJakub Kicinski /* Move the entire word */ 955ee9133a8SJakub Kicinski if (size == 4) { 9562df03a50SJakub Kicinski wrp_mov(nfp_prog, 9572df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 9582df03a50SJakub Kicinski reg_b(src)); 959ee9133a8SJakub Kicinski return 0; 960ee9133a8SJakub Kicinski } 961ee9133a8SJakub Kicinski 9622df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9632df03a50SJakub Kicinski return -EOPNOTSUPP; 9642df03a50SJakub Kicinski 965ee9133a8SJakub Kicinski dst_byte = off % 4; 966ee9133a8SJakub Kicinski 967ee9133a8SJakub Kicinski mask = (1 << size) - 1; 968ee9133a8SJakub Kicinski mask <<= dst_byte; 969ee9133a8SJakub Kicinski 970ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 971ee9133a8SJakub Kicinski return -EOPNOTSUPP; 972ee9133a8SJakub Kicinski 973ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 974ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 975ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 976ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 977ee9133a8SJakub Kicinski shf = 32 - shf; 978ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 979ee9133a8SJakub Kicinski } else { 980ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 981ee9133a8SJakub Kicinski } 982ee9133a8SJakub Kicinski 983ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 984ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 985ee9133a8SJakub Kicinski */ 986ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9872df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 988ee9133a8SJakub Kicinski } else { 989ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 9909a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 9919a90c83cSJakub Kicinski * the middle location will be overwritten fully. 9929a90c83cSJakub Kicinski */ 9939a90c83cSJakub Kicinski if (first || last) 994ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 995ee9133a8SJakub Kicinski } 996ee9133a8SJakub Kicinski 997ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 998ee9133a8SJakub Kicinski 9999a90c83cSJakub Kicinski if (new_gpr || last) { 1000ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1001ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 10022df03a50SJakub Kicinski if (should_inc) 10032df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10049a90c83cSJakub Kicinski } 1005ee9133a8SJakub Kicinski 1006ee9133a8SJakub Kicinski return 0; 1007ee9133a8SJakub Kicinski } 1008ee9133a8SJakub Kicinski 1009ee9133a8SJakub Kicinski static int 1010ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1011b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1012b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1013ee9133a8SJakub Kicinski { 1014d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 10159a90c83cSJakub Kicinski bool first = true, last; 10162df03a50SJakub Kicinski bool needs_inc = false; 10172df03a50SJakub Kicinski swreg stack_off_reg; 1018a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1019ee9133a8SJakub Kicinski u32 gpr_byte = 0; 10202df03a50SJakub Kicinski bool lm3 = true; 1021ee9133a8SJakub Kicinski int ret; 1022ee9133a8SJakub Kicinski 1023b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1024b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1025b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1026b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1027b14157eeSJakub Kicinski */ 1028b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1029b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1030b14157eeSJakub Kicinski 1031b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1032b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1033b14157eeSJakub Kicinski 1034b14157eeSJakub Kicinski needs_inc = true; 1035b14157eeSJakub Kicinski } else if (off + size <= 64) { 10362df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 10372df03a50SJakub Kicinski lm3 = false; 10382df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 10392df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 10402df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 10412df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 10422df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 10432df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 10442df03a50SJakub Kicinski */ 10452df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 10462df03a50SJakub Kicinski stack_imm(nfp_prog)); 10472df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10482df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10492df03a50SJakub Kicinski 10502df03a50SJakub Kicinski off %= 32; 10512df03a50SJakub Kicinski } else { 10522df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 10532df03a50SJakub Kicinski stack_imm(nfp_prog)); 10542df03a50SJakub Kicinski 10552df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10562df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10572df03a50SJakub Kicinski 10582df03a50SJakub Kicinski needs_inc = true; 10592df03a50SJakub Kicinski } 10602df03a50SJakub Kicinski if (lm3) { 10612df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 10622df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 10632df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 10642df03a50SJakub Kicinski } 10652df03a50SJakub Kicinski 1066a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1067a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1068a82b23fbSJakub Kicinski 1069ee9133a8SJakub Kicinski while (size) { 1070ee9133a8SJakub Kicinski u32 slice_end; 1071ee9133a8SJakub Kicinski u8 slice_size; 1072ee9133a8SJakub Kicinski 1073ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1074ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1075ee9133a8SJakub Kicinski slice_size = slice_end - off; 1076ee9133a8SJakub Kicinski 10779a90c83cSJakub Kicinski last = slice_size == size; 10789a90c83cSJakub Kicinski 10792df03a50SJakub Kicinski if (needs_inc) 10802df03a50SJakub Kicinski off %= 4; 10812df03a50SJakub Kicinski 1082a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 10832df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1084ee9133a8SJakub Kicinski if (ret) 1085ee9133a8SJakub Kicinski return ret; 1086ee9133a8SJakub Kicinski 1087a82b23fbSJakub Kicinski prev_gpr = gpr; 10889a90c83cSJakub Kicinski first = false; 10899a90c83cSJakub Kicinski 1090ee9133a8SJakub Kicinski gpr_byte += slice_size; 1091ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1092ee9133a8SJakub Kicinski gpr_byte -= 4; 1093ee9133a8SJakub Kicinski gpr++; 1094ee9133a8SJakub Kicinski } 1095ee9133a8SJakub Kicinski 1096ee9133a8SJakub Kicinski size -= slice_size; 1097ee9133a8SJakub Kicinski off += slice_size; 1098ee9133a8SJakub Kicinski } 1099ee9133a8SJakub Kicinski 1100ee9133a8SJakub Kicinski return 0; 1101ee9133a8SJakub Kicinski } 1102ee9133a8SJakub Kicinski 1103d9ae7f2bSJakub Kicinski static void 1104d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1105d9ae7f2bSJakub Kicinski { 1106b3f868dfSJakub Kicinski swreg tmp_reg; 1107d9ae7f2bSJakub Kicinski 1108d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1109d9ae7f2bSJakub Kicinski if (!imm) 1110d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1111d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1112d9ae7f2bSJakub Kicinski return; 1113d9ae7f2bSJakub Kicinski } 1114d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1115d9ae7f2bSJakub Kicinski if (!~imm) 1116d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1117d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1118d9ae7f2bSJakub Kicinski return; 1119d9ae7f2bSJakub Kicinski } 1120d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1121d9ae7f2bSJakub Kicinski if (!~imm) 1122d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 11235d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1124d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1125d9ae7f2bSJakub Kicinski return; 1126d9ae7f2bSJakub Kicinski } 1127d9ae7f2bSJakub Kicinski 1128d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1129d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1130d9ae7f2bSJakub Kicinski } 1131d9ae7f2bSJakub Kicinski 1132d9ae7f2bSJakub Kicinski static int 1133d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1134d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1135d9ae7f2bSJakub Kicinski { 1136d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1137d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1138d9ae7f2bSJakub Kicinski 1139d9ae7f2bSJakub Kicinski if (skip) { 1140d9ae7f2bSJakub Kicinski meta->skip = true; 1141d9ae7f2bSJakub Kicinski return 0; 1142d9ae7f2bSJakub Kicinski } 1143d9ae7f2bSJakub Kicinski 1144d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1145d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1146d9ae7f2bSJakub Kicinski 1147d9ae7f2bSJakub Kicinski return 0; 1148d9ae7f2bSJakub Kicinski } 1149d9ae7f2bSJakub Kicinski 1150d9ae7f2bSJakub Kicinski static int 1151d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1152d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1153d9ae7f2bSJakub Kicinski { 1154d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1155d9ae7f2bSJakub Kicinski 1156d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1157d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1158d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1159d9ae7f2bSJakub Kicinski 1160d9ae7f2bSJakub Kicinski return 0; 1161d9ae7f2bSJakub Kicinski } 1162d9ae7f2bSJakub Kicinski 1163d9ae7f2bSJakub Kicinski static int 1164d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1165d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1166d9ae7f2bSJakub Kicinski { 1167d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1168d9ae7f2bSJakub Kicinski 1169d9ae7f2bSJakub Kicinski if (skip) { 1170d9ae7f2bSJakub Kicinski meta->skip = true; 1171d9ae7f2bSJakub Kicinski return 0; 1172d9ae7f2bSJakub Kicinski } 1173d9ae7f2bSJakub Kicinski 1174d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1175d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1176d9ae7f2bSJakub Kicinski 1177d9ae7f2bSJakub Kicinski return 0; 1178d9ae7f2bSJakub Kicinski } 1179d9ae7f2bSJakub Kicinski 1180d9ae7f2bSJakub Kicinski static int 1181d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1182d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1183d9ae7f2bSJakub Kicinski { 1184d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1185d9ae7f2bSJakub Kicinski 1186d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1187d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1188d9ae7f2bSJakub Kicinski 1189d9ae7f2bSJakub Kicinski return 0; 1190d9ae7f2bSJakub Kicinski } 1191d9ae7f2bSJakub Kicinski 1192d9ae7f2bSJakub Kicinski static void 1193d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1194d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1195d9ae7f2bSJakub Kicinski { 1196d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1197d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1198d9ae7f2bSJakub Kicinski } 1199d9ae7f2bSJakub Kicinski 1200d9ae7f2bSJakub Kicinski static int 1201d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1202d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1203d9ae7f2bSJakub Kicinski { 1204d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1205d9ae7f2bSJakub Kicinski 1206d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1207d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1208d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1209d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1210d9ae7f2bSJakub Kicinski 1211d9ae7f2bSJakub Kicinski return 0; 1212d9ae7f2bSJakub Kicinski } 1213d9ae7f2bSJakub Kicinski 1214d9ae7f2bSJakub Kicinski static int 1215d9ae7f2bSJakub Kicinski wrp_cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1216d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1217d9ae7f2bSJakub Kicinski { 1218d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1219d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1220d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1221b3f868dfSJakub Kicinski swreg tmp_reg; 1222d9ae7f2bSJakub Kicinski 1223d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1224d9ae7f2bSJakub Kicinski if (!swap) 1225d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), ALU_OP_SUB, tmp_reg); 1226d9ae7f2bSJakub Kicinski else 1227d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, ALU_OP_SUB, reg_a(reg)); 1228d9ae7f2bSJakub Kicinski 1229d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1230d9ae7f2bSJakub Kicinski if (!swap) 1231d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1232d9ae7f2bSJakub Kicinski reg_a(reg + 1), ALU_OP_SUB_C, tmp_reg); 1233d9ae7f2bSJakub Kicinski else 1234d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1235d9ae7f2bSJakub Kicinski tmp_reg, ALU_OP_SUB_C, reg_a(reg + 1)); 1236d9ae7f2bSJakub Kicinski 1237d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1238d9ae7f2bSJakub Kicinski 1239d9ae7f2bSJakub Kicinski return 0; 1240d9ae7f2bSJakub Kicinski } 1241d9ae7f2bSJakub Kicinski 1242d9ae7f2bSJakub Kicinski static int 1243d9ae7f2bSJakub Kicinski wrp_cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1244d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1245d9ae7f2bSJakub Kicinski { 1246d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 124726fa818dSJakub Kicinski u8 areg, breg; 124826fa818dSJakub Kicinski 124926fa818dSJakub Kicinski areg = insn->dst_reg * 2; 125026fa818dSJakub Kicinski breg = insn->src_reg * 2; 1251d9ae7f2bSJakub Kicinski 1252d9ae7f2bSJakub Kicinski if (swap) { 1253d9ae7f2bSJakub Kicinski areg ^= breg; 1254d9ae7f2bSJakub Kicinski breg ^= areg; 1255d9ae7f2bSJakub Kicinski areg ^= breg; 1256d9ae7f2bSJakub Kicinski } 1257d9ae7f2bSJakub Kicinski 1258d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1259d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1260d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 1261d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1262d9ae7f2bSJakub Kicinski 1263d9ae7f2bSJakub Kicinski return 0; 1264d9ae7f2bSJakub Kicinski } 1265d9ae7f2bSJakub Kicinski 12663119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 12673119d1fdSJakub Kicinski { 12683119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 12693119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 12703119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 12713119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 12723119d1fdSJakub Kicinski } 12733119d1fdSJakub Kicinski 12740d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12750d49eaf4SJakub Kicinski { 12760d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 12770d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 12780d49eaf4SJakub Kicinski u32 ret_einval, end; 12790d49eaf4SJakub Kicinski 12800d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 12810d49eaf4SJakub Kicinski 12828231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 12838231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 12848231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 12858231f844SJakub Kicinski return -EINVAL; 12868231f844SJakub Kicinski 12878231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 12888231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 12898231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12908231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12918231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12928231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12938231f844SJakub Kicinski 12948231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12958231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12968231f844SJakub Kicinski 12978231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 12988231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 12998231f844SJakub Kicinski */ 13008231f844SJakub Kicinski 13018231f844SJakub Kicinski return 0; 13028231f844SJakub Kicinski } 13038231f844SJakub Kicinski 13040d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 13050d49eaf4SJakub Kicinski end = ret_einval + 2; 13060d49eaf4SJakub Kicinski 13070d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 13080d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 13090d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 13100d49eaf4SJakub Kicinski 13110d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 13120d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13130d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 13140d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13150d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13160d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 13170d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13180d49eaf4SJakub Kicinski 13190d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 13200d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 13210d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13220d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13230d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 13240d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 13250d49eaf4SJakub Kicinski 13260d49eaf4SJakub Kicinski /* Load the ret code */ 13270d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 13280d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 13290d49eaf4SJakub Kicinski 13300d49eaf4SJakub Kicinski /* Modify the packet metadata */ 13310d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 13320d49eaf4SJakub Kicinski 13330d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 13342314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 13350d49eaf4SJakub Kicinski 13360d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13370d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13380d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 13390d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13400d49eaf4SJakub Kicinski 13410d49eaf4SJakub Kicinski /* return -EINVAL target */ 13420d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 13430d49eaf4SJakub Kicinski return -EINVAL; 13440d49eaf4SJakub Kicinski 13450d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 13460d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 13470d49eaf4SJakub Kicinski 13480d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 13490d49eaf4SJakub Kicinski return -EINVAL; 13500d49eaf4SJakub Kicinski 13510d49eaf4SJakub Kicinski return 0; 13520d49eaf4SJakub Kicinski } 13530d49eaf4SJakub Kicinski 135477a3d311SJakub Kicinski static int 135577a3d311SJakub Kicinski map_lookup_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 135677a3d311SJakub Kicinski { 135777a3d311SJakub Kicinski struct bpf_offloaded_map *offmap; 135877a3d311SJakub Kicinski struct nfp_bpf_map *nfp_map; 135977a3d311SJakub Kicinski bool load_lm_ptr; 136077a3d311SJakub Kicinski u32 ret_tgt; 136177a3d311SJakub Kicinski s64 lm_off; 136277a3d311SJakub Kicinski swreg tid; 136377a3d311SJakub Kicinski 136477a3d311SJakub Kicinski offmap = (struct bpf_offloaded_map *)meta->arg1.map_ptr; 136577a3d311SJakub Kicinski nfp_map = offmap->dev_priv; 136677a3d311SJakub Kicinski 136777a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 136877a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 136977a3d311SJakub Kicinski lm_off += meta->arg2.var_off.value + meta->arg2.off; 137077a3d311SJakub Kicinski load_lm_ptr = meta->arg2_var_off || lm_off; 137177a3d311SJakub Kicinski 137277a3d311SJakub Kicinski /* Set LM0 to start of key */ 137377a3d311SJakub Kicinski if (load_lm_ptr) 137477a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 137577a3d311SJakub Kicinski 137677a3d311SJakub Kicinski /* Load map ID into a register, it should actually fit as an immediate 137777a3d311SJakub Kicinski * but in case it doesn't deal with it here, not in the delay slots. 137877a3d311SJakub Kicinski */ 137977a3d311SJakub Kicinski tid = ur_load_imm_any(nfp_prog, nfp_map->tid, imm_a(nfp_prog)); 138077a3d311SJakub Kicinski 138177a3d311SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + BPF_FUNC_map_lookup_elem, 138277a3d311SJakub Kicinski 2, RELO_BR_HELPER); 138377a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 138477a3d311SJakub Kicinski 138577a3d311SJakub Kicinski /* Load map ID into A0 */ 138677a3d311SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), tid); 138777a3d311SJakub Kicinski 138877a3d311SJakub Kicinski /* Load the return address into B0 */ 138977a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 139077a3d311SJakub Kicinski 139177a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 139277a3d311SJakub Kicinski return -EINVAL; 139377a3d311SJakub Kicinski 139477a3d311SJakub Kicinski /* Reset the LM0 pointer */ 139577a3d311SJakub Kicinski if (!load_lm_ptr) 139677a3d311SJakub Kicinski return 0; 139777a3d311SJakub Kicinski 139877a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 139977a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 140077a3d311SJakub Kicinski 140177a3d311SJakub Kicinski return 0; 140277a3d311SJakub Kicinski } 140377a3d311SJakub Kicinski 1404d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1405d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1406d9ae7f2bSJakub Kicinski { 1407d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1408b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1409b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1410d9ae7f2bSJakub Kicinski 1411b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1412b14157eeSJakub Kicinski swreg stack_depth_reg; 1413b14157eeSJakub Kicinski 1414b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1415b14157eeSJakub Kicinski nfp_prog->stack_depth, 1416b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1417b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1418b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1419b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1420b14157eeSJakub Kicinski } else { 1421b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1422b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1423b14157eeSJakub Kicinski } 1424d9ae7f2bSJakub Kicinski 1425d9ae7f2bSJakub Kicinski return 0; 1426d9ae7f2bSJakub Kicinski } 1427d9ae7f2bSJakub Kicinski 1428d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1429d9ae7f2bSJakub Kicinski { 1430d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1431d9ae7f2bSJakub Kicinski 1432d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1433d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1434d9ae7f2bSJakub Kicinski 1435d9ae7f2bSJakub Kicinski return 0; 1436d9ae7f2bSJakub Kicinski } 1437d9ae7f2bSJakub Kicinski 1438d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1439d9ae7f2bSJakub Kicinski { 1440d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1441d9ae7f2bSJakub Kicinski } 1442d9ae7f2bSJakub Kicinski 1443d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1444d9ae7f2bSJakub Kicinski { 1445d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1446d9ae7f2bSJakub Kicinski } 1447d9ae7f2bSJakub Kicinski 1448d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1449d9ae7f2bSJakub Kicinski { 1450d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1451d9ae7f2bSJakub Kicinski } 1452d9ae7f2bSJakub Kicinski 1453d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1454d9ae7f2bSJakub Kicinski { 1455d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1456d9ae7f2bSJakub Kicinski } 1457d9ae7f2bSJakub Kicinski 1458d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1459d9ae7f2bSJakub Kicinski { 1460d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1461d9ae7f2bSJakub Kicinski } 1462d9ae7f2bSJakub Kicinski 1463d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1464d9ae7f2bSJakub Kicinski { 1465d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1466d9ae7f2bSJakub Kicinski } 1467d9ae7f2bSJakub Kicinski 1468d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1469d9ae7f2bSJakub Kicinski { 1470d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1471d9ae7f2bSJakub Kicinski 1472d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1473d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1474d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1475d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1476d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1477d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1478d9ae7f2bSJakub Kicinski 1479d9ae7f2bSJakub Kicinski return 0; 1480d9ae7f2bSJakub Kicinski } 1481d9ae7f2bSJakub Kicinski 1482d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1483d9ae7f2bSJakub Kicinski { 1484d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1485d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1486d9ae7f2bSJakub Kicinski 1487d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1488d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1489d9ae7f2bSJakub Kicinski 1490d9ae7f2bSJakub Kicinski return 0; 1491d9ae7f2bSJakub Kicinski } 1492d9ae7f2bSJakub Kicinski 1493d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1494d9ae7f2bSJakub Kicinski { 1495d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1496d9ae7f2bSJakub Kicinski 1497d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1498d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1499d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1500d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1501d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1502d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1503d9ae7f2bSJakub Kicinski 1504d9ae7f2bSJakub Kicinski return 0; 1505d9ae7f2bSJakub Kicinski } 1506d9ae7f2bSJakub Kicinski 1507d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1508d9ae7f2bSJakub Kicinski { 1509d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1510d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1511d9ae7f2bSJakub Kicinski 1512d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1513d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1514d9ae7f2bSJakub Kicinski 1515d9ae7f2bSJakub Kicinski return 0; 1516d9ae7f2bSJakub Kicinski } 1517d9ae7f2bSJakub Kicinski 1518254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1519254ef4d7SJiong Wang { 1520254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1521254ef4d7SJiong Wang 1522254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1523254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1524254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1525254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1526254ef4d7SJiong Wang 1527254ef4d7SJiong Wang return 0; 1528254ef4d7SJiong Wang } 1529254ef4d7SJiong Wang 1530d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1531d9ae7f2bSJakub Kicinski { 1532d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15333cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1534d9ae7f2bSJakub Kicinski 15353cae1319SJakub Kicinski if (insn->imm < 32) { 15363cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15373cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15383cae1319SJakub Kicinski SHF_SC_R_DSHF, 32 - insn->imm); 15393cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15403cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15413cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm); 15423cae1319SJakub Kicinski } else if (insn->imm == 32) { 15433cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, dst); 15443cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15453cae1319SJakub Kicinski } else if (insn->imm > 32) { 15463cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15473cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15483cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm - 32); 15493cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15503cae1319SJakub Kicinski } 1551d9ae7f2bSJakub Kicinski 1552d9ae7f2bSJakub Kicinski return 0; 1553d9ae7f2bSJakub Kicinski } 1554d9ae7f2bSJakub Kicinski 1555d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1556d9ae7f2bSJakub Kicinski { 1557d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15583cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1559d9ae7f2bSJakub Kicinski 15603cae1319SJakub Kicinski if (insn->imm < 32) { 15613cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15623cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15633cae1319SJakub Kicinski SHF_SC_R_DSHF, insn->imm); 15643cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15653cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15663cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm); 15673cae1319SJakub Kicinski } else if (insn->imm == 32) { 15683cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst, dst + 1); 15693cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15703cae1319SJakub Kicinski } else if (insn->imm > 32) { 15713cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15723cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15733cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm - 32); 15743cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15753cae1319SJakub Kicinski } 1576d9ae7f2bSJakub Kicinski 1577d9ae7f2bSJakub Kicinski return 0; 1578d9ae7f2bSJakub Kicinski } 1579d9ae7f2bSJakub Kicinski 1580d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1581d9ae7f2bSJakub Kicinski { 1582d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1583d9ae7f2bSJakub Kicinski 1584d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1585d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1586d9ae7f2bSJakub Kicinski 1587d9ae7f2bSJakub Kicinski return 0; 1588d9ae7f2bSJakub Kicinski } 1589d9ae7f2bSJakub Kicinski 1590d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1591d9ae7f2bSJakub Kicinski { 1592d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1593d9ae7f2bSJakub Kicinski 1594d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1595d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1596d9ae7f2bSJakub Kicinski 1597d9ae7f2bSJakub Kicinski return 0; 1598d9ae7f2bSJakub Kicinski } 1599d9ae7f2bSJakub Kicinski 1600d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1601d9ae7f2bSJakub Kicinski { 1602d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1603d9ae7f2bSJakub Kicinski } 1604d9ae7f2bSJakub Kicinski 1605d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1606d9ae7f2bSJakub Kicinski { 1607d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1608d9ae7f2bSJakub Kicinski } 1609d9ae7f2bSJakub Kicinski 1610d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1611d9ae7f2bSJakub Kicinski { 1612d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1613d9ae7f2bSJakub Kicinski } 1614d9ae7f2bSJakub Kicinski 1615d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1616d9ae7f2bSJakub Kicinski { 1617d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1618d9ae7f2bSJakub Kicinski } 1619d9ae7f2bSJakub Kicinski 1620d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1621d9ae7f2bSJakub Kicinski { 1622d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1623d9ae7f2bSJakub Kicinski } 1624d9ae7f2bSJakub Kicinski 1625d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1626d9ae7f2bSJakub Kicinski { 1627d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1628d9ae7f2bSJakub Kicinski } 1629d9ae7f2bSJakub Kicinski 1630d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1631d9ae7f2bSJakub Kicinski { 1632d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1633d9ae7f2bSJakub Kicinski } 1634d9ae7f2bSJakub Kicinski 1635d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1636d9ae7f2bSJakub Kicinski { 1637d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1638d9ae7f2bSJakub Kicinski } 1639d9ae7f2bSJakub Kicinski 1640d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1641d9ae7f2bSJakub Kicinski { 1642d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1643d9ae7f2bSJakub Kicinski } 1644d9ae7f2bSJakub Kicinski 1645d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1646d9ae7f2bSJakub Kicinski { 1647d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1648d9ae7f2bSJakub Kicinski } 1649d9ae7f2bSJakub Kicinski 1650254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1651254ef4d7SJiong Wang { 1652254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1653254ef4d7SJiong Wang 1654254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1655254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1656254ef4d7SJiong Wang 1657254ef4d7SJiong Wang return 0; 1658254ef4d7SJiong Wang } 1659254ef4d7SJiong Wang 1660d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1661d9ae7f2bSJakub Kicinski { 1662d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1663d9ae7f2bSJakub Kicinski 1664d9ae7f2bSJakub Kicinski if (!insn->imm) 1665d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1666d9ae7f2bSJakub Kicinski 1667d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1668d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1669d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1670d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1671d9ae7f2bSJakub Kicinski 1672d9ae7f2bSJakub Kicinski return 0; 1673d9ae7f2bSJakub Kicinski } 1674d9ae7f2bSJakub Kicinski 16753119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16763119d1fdSJakub Kicinski { 16773119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 16783119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 16793119d1fdSJakub Kicinski 16803119d1fdSJakub Kicinski switch (insn->imm) { 16813119d1fdSJakub Kicinski case 16: 16823119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 16833119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 16843119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 16853119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 16863119d1fdSJakub Kicinski 16873119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16883119d1fdSJakub Kicinski break; 16893119d1fdSJakub Kicinski case 32: 16903119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 16913119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16923119d1fdSJakub Kicinski break; 16933119d1fdSJakub Kicinski case 64: 16943119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 16953119d1fdSJakub Kicinski 16963119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 16973119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 16983119d1fdSJakub Kicinski break; 16993119d1fdSJakub Kicinski } 17003119d1fdSJakub Kicinski 17013119d1fdSJakub Kicinski return 0; 17023119d1fdSJakub Kicinski } 17033119d1fdSJakub Kicinski 1704d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1705d9ae7f2bSJakub Kicinski { 17069f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 17079f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 17089f16c8abSJakub Kicinski u8 dst; 17099f16c8abSJakub Kicinski 17109f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 17119f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 17129f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 17139f16c8abSJakub Kicinski 17149f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 17159f16c8abSJakub Kicinski 17169f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 17179f16c8abSJakub Kicinski if (imm_hi == imm_lo) 17189f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 17199f16c8abSJakub Kicinski else 17209f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 1721d9ae7f2bSJakub Kicinski 1722d9ae7f2bSJakub Kicinski return 0; 1723d9ae7f2bSJakub Kicinski } 1724d9ae7f2bSJakub Kicinski 1725d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1726d9ae7f2bSJakub Kicinski { 1727d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1728d9ae7f2bSJakub Kicinski return 0; 1729d9ae7f2bSJakub Kicinski } 1730d9ae7f2bSJakub Kicinski 1731d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1732d9ae7f2bSJakub Kicinski { 1733d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1734d9ae7f2bSJakub Kicinski } 1735d9ae7f2bSJakub Kicinski 1736d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1737d9ae7f2bSJakub Kicinski { 1738d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1739d9ae7f2bSJakub Kicinski } 1740d9ae7f2bSJakub Kicinski 1741d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1742d9ae7f2bSJakub Kicinski { 1743d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1744d9ae7f2bSJakub Kicinski } 1745d9ae7f2bSJakub Kicinski 1746d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1747d9ae7f2bSJakub Kicinski { 1748d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17490a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 1750d9ae7f2bSJakub Kicinski } 1751d9ae7f2bSJakub Kicinski 1752d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1753d9ae7f2bSJakub Kicinski { 1754d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17550a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 1756d9ae7f2bSJakub Kicinski } 1757d9ae7f2bSJakub Kicinski 1758d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1759d9ae7f2bSJakub Kicinski { 1760d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17610a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 1762d9ae7f2bSJakub Kicinski } 1763d9ae7f2bSJakub Kicinski 1764a82b23fbSJakub Kicinski static int 1765a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1766d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1767a82b23fbSJakub Kicinski { 1768d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1769b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 1770b14157eeSJakub Kicinski true, wrp_lmem_load); 1771a82b23fbSJakub Kicinski } 1772a82b23fbSJakub Kicinski 1773943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1774943c57b9SJakub Kicinski u8 size) 1775d9ae7f2bSJakub Kicinski { 1776bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1777bfddbc8aSJakub Kicinski 1778943c57b9SJakub Kicinski switch (meta->insn.off) { 1779c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 1780c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 1781943c57b9SJakub Kicinski return -EOPNOTSUPP; 1782bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 1783bfddbc8aSJakub Kicinski break; 1784c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 1785c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 1786bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1787bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1788bfddbc8aSJakub Kicinski break; 1789c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 1790c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 1791bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1792bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 1793bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1794943c57b9SJakub Kicinski break; 1795943c57b9SJakub Kicinski default: 1796d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1797943c57b9SJakub Kicinski } 1798943c57b9SJakub Kicinski 1799943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1800d9ae7f2bSJakub Kicinski 1801d9ae7f2bSJakub Kicinski return 0; 1802d9ae7f2bSJakub Kicinski } 1803d9ae7f2bSJakub Kicinski 1804943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1805943c57b9SJakub Kicinski u8 size) 1806d9ae7f2bSJakub Kicinski { 1807b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1808d9ae7f2bSJakub Kicinski 1809943c57b9SJakub Kicinski switch (meta->insn.off) { 1810c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 1811c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 1812c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1813c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1814943c57b9SJakub Kicinski break; 1815c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 1816c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 1817c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1818943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 1819943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1820943c57b9SJakub Kicinski break; 1821943c57b9SJakub Kicinski default: 1822943c57b9SJakub Kicinski return -EOPNOTSUPP; 1823943c57b9SJakub Kicinski } 1824d9ae7f2bSJakub Kicinski 1825943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1826d9ae7f2bSJakub Kicinski 1827d9ae7f2bSJakub Kicinski return 0; 1828d9ae7f2bSJakub Kicinski } 1829d9ae7f2bSJakub Kicinski 18302ca71441SJakub Kicinski static int 18312ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18322ca71441SJakub Kicinski unsigned int size) 18332ca71441SJakub Kicinski { 18342ca71441SJakub Kicinski swreg tmp_reg; 18352ca71441SJakub Kicinski 18362ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18372ca71441SJakub Kicinski 18383dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 18393dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18403dd43c33SJakub Kicinski } 18413dd43c33SJakub Kicinski 18423dd43c33SJakub Kicinski static int 18433dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18443dd43c33SJakub Kicinski unsigned int size) 18453dd43c33SJakub Kicinski { 18463dd43c33SJakub Kicinski swreg tmp_reg; 18473dd43c33SJakub Kicinski 18483dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18493dd43c33SJakub Kicinski 18503dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 18513dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18522ca71441SJakub Kicinski } 18532ca71441SJakub Kicinski 1854be759237SJiong Wang static void 1855be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 1856be759237SJiong Wang struct nfp_insn_meta *meta) 1857be759237SJiong Wang { 1858be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 1859be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 1860be759237SJiong Wang swreg src_base, off; 1861be759237SJiong Wang u8 xfer_num, len; 1862be759237SJiong Wang bool indir; 1863be759237SJiong Wang 1864be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 1865be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 1866be759237SJiong Wang len = range_end - range_start; 1867be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 1868be759237SJiong Wang 1869be759237SJiong Wang indir = len > 8 * REG_WIDTH; 1870be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 1871be759237SJiong Wang if (indir) 1872be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 1873be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 1874be759237SJiong Wang 1875be759237SJiong Wang /* Cache memory into transfer-in registers. */ 1876be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 1877be759237SJiong Wang off, xfer_num - 1, true, indir); 1878be759237SJiong Wang } 1879be759237SJiong Wang 1880be759237SJiong Wang static int 188191ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 188291ff69e8SJiong Wang struct nfp_insn_meta *meta, 188391ff69e8SJiong Wang unsigned int size) 188491ff69e8SJiong Wang { 188591ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 188691ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 188791ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 188891ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 188991ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 189091ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 189191ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 189291ff69e8SJiong Wang 189391ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 189491ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 189591ff69e8SJiong Wang src_lo = reg_xfer(idx); 189691ff69e8SJiong Wang 189791ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 189891ff69e8SJiong Wang if (size > REG_WIDTH - off) { 189991ff69e8SJiong Wang /* Calculate the part in the second register. */ 190091ff69e8SJiong Wang len_lo = REG_WIDTH - off; 190191ff69e8SJiong Wang len_mid = size - len_lo; 190291ff69e8SJiong Wang 190391ff69e8SJiong Wang /* Calculate the part in the third register. */ 190491ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 190591ff69e8SJiong Wang len_mid = REG_WIDTH; 190691ff69e8SJiong Wang } 190791ff69e8SJiong Wang 190891ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 190991ff69e8SJiong Wang 191091ff69e8SJiong Wang if (!len_mid) { 191191ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 191291ff69e8SJiong Wang return 0; 191391ff69e8SJiong Wang } 191491ff69e8SJiong Wang 191591ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 191691ff69e8SJiong Wang 191791ff69e8SJiong Wang if (size <= REG_WIDTH) { 191891ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 191991ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 192091ff69e8SJiong Wang } else { 192191ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 192291ff69e8SJiong Wang 192391ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 192491ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 192591ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 192691ff69e8SJiong Wang REG_WIDTH - len_lo); 192791ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 192891ff69e8SJiong Wang len_lo); 192991ff69e8SJiong Wang } 193091ff69e8SJiong Wang 193191ff69e8SJiong Wang return 0; 193291ff69e8SJiong Wang } 193391ff69e8SJiong Wang 193491ff69e8SJiong Wang static int 1935be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 1936be759237SJiong Wang struct nfp_insn_meta *meta, 1937be759237SJiong Wang unsigned int size) 1938be759237SJiong Wang { 1939be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 1940be759237SJiong Wang u8 dst_gpr, idx; 1941be759237SJiong Wang 1942be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 1943be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 1944be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 1945be759237SJiong Wang dst_lo = reg_both(dst_gpr); 1946be759237SJiong Wang src_lo = reg_xfer(idx); 1947be759237SJiong Wang 1948be759237SJiong Wang if (size < REG_WIDTH) { 1949be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 1950be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1951be759237SJiong Wang } else if (size == REG_WIDTH) { 1952be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1953be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1954be759237SJiong Wang } else { 1955be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 1956be759237SJiong Wang 1957be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1958be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 1959be759237SJiong Wang } 1960be759237SJiong Wang 1961be759237SJiong Wang return 0; 1962be759237SJiong Wang } 1963be759237SJiong Wang 1964be759237SJiong Wang static int 1965be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 1966be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 1967be759237SJiong Wang { 1968be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 1969be759237SJiong Wang 197091ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 1971be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 197291ff69e8SJiong Wang 197391ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 1974be759237SJiong Wang } 1975be759237SJiong Wang 19762ca71441SJakub Kicinski static int 19772ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 19782ca71441SJakub Kicinski unsigned int size) 19792ca71441SJakub Kicinski { 19809879a381SJiong Wang if (meta->ldst_gather_len) 19819879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 19829879a381SJiong Wang 19832ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 1984012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 19852ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 19862ca71441SJakub Kicinski else 19872ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 19882ca71441SJakub Kicinski } 19892ca71441SJakub Kicinski 1990be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 1991be759237SJiong Wang if (meta->pkt_cache.range_end) { 1992be759237SJiong Wang if (meta->pkt_cache.do_init) 1993be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 1994be759237SJiong Wang 1995be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 1996be759237SJiong Wang } else { 19972ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 1998be759237SJiong Wang } 1999be759237SJiong Wang } 20002ca71441SJakub Kicinski 2001a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2002d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2003d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2004a82b23fbSJakub Kicinski 20053dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 20063dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 20073dd43c33SJakub Kicinski 20082ca71441SJakub Kicinski return -EOPNOTSUPP; 20092ca71441SJakub Kicinski } 20102ca71441SJakub Kicinski 20112ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20122ca71441SJakub Kicinski { 20132ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 20142ca71441SJakub Kicinski } 20152ca71441SJakub Kicinski 20162ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20172ca71441SJakub Kicinski { 20182ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 20192ca71441SJakub Kicinski } 20202ca71441SJakub Kicinski 2021d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2022d9ae7f2bSJakub Kicinski { 20232ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 20242ca71441SJakub Kicinski } 20252ca71441SJakub Kicinski 20262ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20272ca71441SJakub Kicinski { 20282ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2029d9ae7f2bSJakub Kicinski } 2030d9ae7f2bSJakub Kicinski 2031e663fe38SJakub Kicinski static int 2032e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2033e663fe38SJakub Kicinski unsigned int size) 2034d9ae7f2bSJakub Kicinski { 2035e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2036e663fe38SJakub Kicinski swreg off_reg; 2037e663fe38SJakub Kicinski 2038e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2039e663fe38SJakub Kicinski 2040e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2041e663fe38SJakub Kicinski imm, size); 2042e663fe38SJakub Kicinski } 2043e663fe38SJakub Kicinski 2044e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2045e663fe38SJakub Kicinski unsigned int size) 2046e663fe38SJakub Kicinski { 2047e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2048e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2049e663fe38SJakub Kicinski 2050d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2051d9ae7f2bSJakub Kicinski } 2052d9ae7f2bSJakub Kicinski 2053e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2054d9ae7f2bSJakub Kicinski { 2055e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2056e663fe38SJakub Kicinski } 2057e663fe38SJakub Kicinski 2058e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2059e663fe38SJakub Kicinski { 2060e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2061e663fe38SJakub Kicinski } 2062e663fe38SJakub Kicinski 2063e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2064e663fe38SJakub Kicinski { 2065e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2066e663fe38SJakub Kicinski } 2067e663fe38SJakub Kicinski 2068e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2069e663fe38SJakub Kicinski { 2070e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2071e663fe38SJakub Kicinski } 2072e663fe38SJakub Kicinski 2073e663fe38SJakub Kicinski static int 2074e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2075e663fe38SJakub Kicinski unsigned int size) 2076e663fe38SJakub Kicinski { 2077e663fe38SJakub Kicinski swreg off_reg; 2078e663fe38SJakub Kicinski 2079e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2080e663fe38SJakub Kicinski 2081e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2082e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2083e663fe38SJakub Kicinski } 2084e663fe38SJakub Kicinski 2085e663fe38SJakub Kicinski static int 2086ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2087d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2088ee9133a8SJakub Kicinski { 2089d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2090b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2091b14157eeSJakub Kicinski false, wrp_lmem_store); 2092ee9133a8SJakub Kicinski } 2093ee9133a8SJakub Kicinski 2094ee9133a8SJakub Kicinski static int 2095e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2096e663fe38SJakub Kicinski unsigned int size) 2097e663fe38SJakub Kicinski { 2098e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2099e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2100e663fe38SJakub Kicinski 2101ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2102d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2103d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2104ee9133a8SJakub Kicinski 2105d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2106d9ae7f2bSJakub Kicinski } 2107d9ae7f2bSJakub Kicinski 2108e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2109e663fe38SJakub Kicinski { 2110e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2111e663fe38SJakub Kicinski } 2112e663fe38SJakub Kicinski 2113e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2114e663fe38SJakub Kicinski { 2115e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2116e663fe38SJakub Kicinski } 2117e663fe38SJakub Kicinski 2118d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2119d9ae7f2bSJakub Kicinski { 2120e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2121e663fe38SJakub Kicinski } 21222ca71441SJakub Kicinski 2123e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2124e663fe38SJakub Kicinski { 2125e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2126d9ae7f2bSJakub Kicinski } 2127d9ae7f2bSJakub Kicinski 2128d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2129d9ae7f2bSJakub Kicinski { 2130d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2131d9ae7f2bSJakub Kicinski 2132d9ae7f2bSJakub Kicinski return 0; 2133d9ae7f2bSJakub Kicinski } 2134d9ae7f2bSJakub Kicinski 2135d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2136d9ae7f2bSJakub Kicinski { 2137d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2138d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2139b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2140b3f868dfSJakub Kicinski 2141b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2142b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2143d9ae7f2bSJakub Kicinski 2144d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2145d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2146d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2147d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2148d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2149d9ae7f2bSJakub Kicinski } 2150d9ae7f2bSJakub Kicinski 2151d9ae7f2bSJakub Kicinski if (imm >> 32) { 2152d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2153d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2154d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2155d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2156d9ae7f2bSJakub Kicinski } 2157d9ae7f2bSJakub Kicinski 2158d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2159d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2160d9ae7f2bSJakub Kicinski 2161d9ae7f2bSJakub Kicinski return 0; 2162d9ae7f2bSJakub Kicinski } 2163d9ae7f2bSJakub Kicinski 2164d9ae7f2bSJakub Kicinski static int jgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2165d9ae7f2bSJakub Kicinski { 216626fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true); 2167d9ae7f2bSJakub Kicinski } 2168d9ae7f2bSJakub Kicinski 2169d9ae7f2bSJakub Kicinski static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2170d9ae7f2bSJakub Kicinski { 217126fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false); 2172d9ae7f2bSJakub Kicinski } 2173d9ae7f2bSJakub Kicinski 21745dd294d4SDaniel Borkmann static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21755dd294d4SDaniel Borkmann { 217626fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, false); 21775dd294d4SDaniel Borkmann } 21785dd294d4SDaniel Borkmann 21795dd294d4SDaniel Borkmann static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21805dd294d4SDaniel Borkmann { 218126fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); 21825dd294d4SDaniel Borkmann } 21835dd294d4SDaniel Borkmann 2184c087aa8bSNic Viljoen static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2185c087aa8bSNic Viljoen { 2186c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true); 2187c087aa8bSNic Viljoen } 2188c087aa8bSNic Viljoen 2189c087aa8bSNic Viljoen static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2190c087aa8bSNic Viljoen { 2191c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false); 2192c087aa8bSNic Viljoen } 2193c087aa8bSNic Viljoen 2194c087aa8bSNic Viljoen static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2195c087aa8bSNic Viljoen { 2196c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false); 2197c087aa8bSNic Viljoen } 2198c087aa8bSNic Viljoen 2199c087aa8bSNic Viljoen static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2200c087aa8bSNic Viljoen { 2201c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true); 2202c087aa8bSNic Viljoen } 2203c087aa8bSNic Viljoen 2204d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2205d9ae7f2bSJakub Kicinski { 2206d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2207d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2208b3f868dfSJakub Kicinski swreg tmp_reg; 2209d9ae7f2bSJakub Kicinski 2210d9ae7f2bSJakub Kicinski if (!imm) { 2211d9ae7f2bSJakub Kicinski meta->skip = true; 2212d9ae7f2bSJakub Kicinski return 0; 2213d9ae7f2bSJakub Kicinski } 2214d9ae7f2bSJakub Kicinski 2215d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2216d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2217d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2218d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2219d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2220d9ae7f2bSJakub Kicinski } 2221d9ae7f2bSJakub Kicinski 2222d9ae7f2bSJakub Kicinski if (imm >> 32) { 2223d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2224d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2225d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2226d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2227d9ae7f2bSJakub Kicinski } 2228d9ae7f2bSJakub Kicinski 2229d9ae7f2bSJakub Kicinski return 0; 2230d9ae7f2bSJakub Kicinski } 2231d9ae7f2bSJakub Kicinski 2232d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2233d9ae7f2bSJakub Kicinski { 2234d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2235d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2236b3f868dfSJakub Kicinski swreg tmp_reg; 2237d9ae7f2bSJakub Kicinski 2238d9ae7f2bSJakub Kicinski if (!imm) { 2239d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2240d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2241d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 224282837370SJakub Kicinski return 0; 2243d9ae7f2bSJakub Kicinski } 2244d9ae7f2bSJakub Kicinski 2245d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2246d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2247d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2248d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2249d9ae7f2bSJakub Kicinski 2250d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2251d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2252d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2253d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2254d9ae7f2bSJakub Kicinski 2255d9ae7f2bSJakub Kicinski return 0; 2256d9ae7f2bSJakub Kicinski } 2257d9ae7f2bSJakub Kicinski 2258d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2259d9ae7f2bSJakub Kicinski { 2260d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2261d9ae7f2bSJakub Kicinski 2262d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2263d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2264d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2265d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2266d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2267d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2268d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2269d9ae7f2bSJakub Kicinski 2270d9ae7f2bSJakub Kicinski return 0; 2271d9ae7f2bSJakub Kicinski } 2272d9ae7f2bSJakub Kicinski 2273d9ae7f2bSJakub Kicinski static int jgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2274d9ae7f2bSJakub Kicinski { 227526fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true); 2276d9ae7f2bSJakub Kicinski } 2277d9ae7f2bSJakub Kicinski 2278d9ae7f2bSJakub Kicinski static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2279d9ae7f2bSJakub Kicinski { 228026fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false); 2281d9ae7f2bSJakub Kicinski } 2282d9ae7f2bSJakub Kicinski 22835dd294d4SDaniel Borkmann static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22845dd294d4SDaniel Borkmann { 228526fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, false); 22865dd294d4SDaniel Borkmann } 22875dd294d4SDaniel Borkmann 22885dd294d4SDaniel Borkmann static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22895dd294d4SDaniel Borkmann { 229026fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); 22915dd294d4SDaniel Borkmann } 22925dd294d4SDaniel Borkmann 2293c087aa8bSNic Viljoen static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2294c087aa8bSNic Viljoen { 2295c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true); 2296c087aa8bSNic Viljoen } 2297c087aa8bSNic Viljoen 2298c087aa8bSNic Viljoen static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2299c087aa8bSNic Viljoen { 2300c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false); 2301c087aa8bSNic Viljoen } 2302c087aa8bSNic Viljoen 2303c087aa8bSNic Viljoen static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2304c087aa8bSNic Viljoen { 2305c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false); 2306c087aa8bSNic Viljoen } 2307c087aa8bSNic Viljoen 2308c087aa8bSNic Viljoen static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2309c087aa8bSNic Viljoen { 2310c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, true); 2311c087aa8bSNic Viljoen } 2312c087aa8bSNic Viljoen 2313d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2314d9ae7f2bSJakub Kicinski { 2315d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2316d9ae7f2bSJakub Kicinski } 2317d9ae7f2bSJakub Kicinski 2318d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2319d9ae7f2bSJakub Kicinski { 2320d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2321d9ae7f2bSJakub Kicinski } 2322d9ae7f2bSJakub Kicinski 23232cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23242cb230bdSJakub Kicinski { 23252cb230bdSJakub Kicinski switch (meta->insn.imm) { 23260d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 23270d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 232877a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 232977a3d311SJakub Kicinski return map_lookup_stack(nfp_prog, meta); 23302cb230bdSJakub Kicinski default: 23312cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 23322cb230bdSJakub Kicinski return -EOPNOTSUPP; 23332cb230bdSJakub Kicinski } 23342cb230bdSJakub Kicinski } 23352cb230bdSJakub Kicinski 2336d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2337d9ae7f2bSJakub Kicinski { 2338e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2339d9ae7f2bSJakub Kicinski 2340d9ae7f2bSJakub Kicinski return 0; 2341d9ae7f2bSJakub Kicinski } 2342d9ae7f2bSJakub Kicinski 2343d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2344d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2345d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2346d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2347d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2348d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2349d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2350d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2351d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2352d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2353d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2354d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2355d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2356254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2357d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2358d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2359d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2360d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2361d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2362d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2363d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2364d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2365d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2366d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2367d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2368d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2369d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2370d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2371254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2372d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 23733119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2374d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2375d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2376d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2377d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2378d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2379d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2380d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 23812ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 23822ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2383d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 23842ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2385e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2386e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2387d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2388e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2389e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2390e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2391e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2392e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2393d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2394d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 2395d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = jgt_imm, 2396d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, 23975dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, 23985dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, 2399c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_K] = jsgt_imm, 2400c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_K] = jsge_imm, 2401c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_K] = jslt_imm, 2402c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_K] = jsle_imm, 2403d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2404d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2405d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 2406d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = jgt_reg, 2407d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, 24085dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, 24095dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, 2410c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_X] = jsgt_reg, 2411c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_X] = jsge_reg, 2412c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_X] = jslt_reg, 2413c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_X] = jsle_reg, 2414d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2415d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 24162cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2417d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2418d9ae7f2bSJakub Kicinski }; 2419d9ae7f2bSJakub Kicinski 2420d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2421d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2422d9ae7f2bSJakub Kicinski { 24235b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2424854dc87dSJiong Wang u32 idx, br_idx; 2425d9ae7f2bSJakub Kicinski 2426854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2427d9ae7f2bSJakub Kicinski if (meta->skip) 2428d9ae7f2bSJakub Kicinski continue; 24292cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 24302cb230bdSJakub Kicinski continue; 2431d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2432d9ae7f2bSJakub Kicinski continue; 2433d9ae7f2bSJakub Kicinski 24345b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 24352314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 24365b674140SJiong Wang else 24372314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2438854dc87dSJiong Wang 2439d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2440d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2441d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2442d9ae7f2bSJakub Kicinski return -ELOOP; 2443d9ae7f2bSJakub Kicinski } 2444d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 24452314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 24462314fe9eSJakub Kicinski RELO_BR_REL) 2447d9ae7f2bSJakub Kicinski continue; 2448d9ae7f2bSJakub Kicinski 24495b674140SJiong Wang if (!meta->jmp_dst) { 24505b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2451d9ae7f2bSJakub Kicinski return -ELOOP; 2452d9ae7f2bSJakub Kicinski } 2453d9ae7f2bSJakub Kicinski 24545b674140SJiong Wang jmp_dst = meta->jmp_dst; 2455854dc87dSJiong Wang 24565b674140SJiong Wang if (jmp_dst->skip) { 2457d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2458d9ae7f2bSJakub Kicinski return -ELOOP; 2459d9ae7f2bSJakub Kicinski } 2460d9ae7f2bSJakub Kicinski 24612314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2462d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2463d9ae7f2bSJakub Kicinski continue; 24645b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2465d9ae7f2bSJakub Kicinski } 2466d9ae7f2bSJakub Kicinski } 2467d9ae7f2bSJakub Kicinski 2468d9ae7f2bSJakub Kicinski return 0; 2469d9ae7f2bSJakub Kicinski } 2470d9ae7f2bSJakub Kicinski 2471d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2472d9ae7f2bSJakub Kicinski { 247318e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 247418e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 247518e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2476d9ae7f2bSJakub Kicinski } 2477d9ae7f2bSJakub Kicinski 2478d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2479d9ae7f2bSJakub Kicinski { 2480d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2481d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2482d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2483d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2484d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2485d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2486d9ae7f2bSJakub Kicinski * 2487d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2488d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2489d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2490d9ae7f2bSJakub Kicinski * packets up the stack. 2491d9ae7f2bSJakub Kicinski */ 2492d9ae7f2bSJakub Kicinski /* Target for aborts */ 2493d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2494d9ae7f2bSJakub Kicinski 2495e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2496d9ae7f2bSJakub Kicinski 2497c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2498d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2499d9ae7f2bSJakub Kicinski 2500d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2501d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2502d9ae7f2bSJakub Kicinski 2503d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2504d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2505d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2506c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2507d9ae7f2bSJakub Kicinski 2508d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2509d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2510d9ae7f2bSJakub Kicinski 2511d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2512d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2513d9ae7f2bSJakub Kicinski 2514d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2515d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2516d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2517d9ae7f2bSJakub Kicinski 2518d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2519d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2520d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2521d9ae7f2bSJakub Kicinski 2522e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2523d9ae7f2bSJakub Kicinski 2524d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2525d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2526d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2527d9ae7f2bSJakub Kicinski } 2528d9ae7f2bSJakub Kicinski 2529d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2530d9ae7f2bSJakub Kicinski { 2531d9ae7f2bSJakub Kicinski /* XDP return codes: 2532d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2533d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2534d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2535d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2536d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2537d9ae7f2bSJakub Kicinski */ 2538d9ae7f2bSJakub Kicinski /* Target for aborts */ 2539d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2540d9ae7f2bSJakub Kicinski 2541e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2542d9ae7f2bSJakub Kicinski 2543c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2544d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2545d9ae7f2bSJakub Kicinski 2546d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2547d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2548d9ae7f2bSJakub Kicinski 2549d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2550d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2551d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2552d9ae7f2bSJakub Kicinski 2553d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2554d9ae7f2bSJakub Kicinski 2555d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2556d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2557d9ae7f2bSJakub Kicinski 2558d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2559d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2560d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2561d9ae7f2bSJakub Kicinski 2562e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2563d9ae7f2bSJakub Kicinski 2564c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2565d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2566d9ae7f2bSJakub Kicinski } 2567d9ae7f2bSJakub Kicinski 2568d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2569d9ae7f2bSJakub Kicinski { 2570012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2571012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2572d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2573d9ae7f2bSJakub Kicinski break; 2574012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2575d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2576d9ae7f2bSJakub Kicinski break; 2577012bb8a8SJakub Kicinski default: 2578012bb8a8SJakub Kicinski WARN_ON(1); 2579d9ae7f2bSJakub Kicinski } 2580d9ae7f2bSJakub Kicinski } 2581d9ae7f2bSJakub Kicinski 2582d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2583d9ae7f2bSJakub Kicinski { 2584d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2585ff42bb9fSJakub Kicinski int err; 2586d9ae7f2bSJakub Kicinski 2587d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2588d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2589d9ae7f2bSJakub Kicinski return nfp_prog->error; 2590d9ae7f2bSJakub Kicinski 2591d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2592d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2593d9ae7f2bSJakub Kicinski 2594d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2595d9ae7f2bSJakub Kicinski 2596d9ae7f2bSJakub Kicinski if (meta->skip) { 2597d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2598d9ae7f2bSJakub Kicinski continue; 2599d9ae7f2bSJakub Kicinski } 2600d9ae7f2bSJakub Kicinski 2601d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2602d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2603d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2604d9ae7f2bSJakub Kicinski if (!cb) 2605d9ae7f2bSJakub Kicinski return -ENOENT; 2606d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2607d9ae7f2bSJakub Kicinski if (err) 2608d9ae7f2bSJakub Kicinski return err; 2609d9ae7f2bSJakub Kicinski 2610d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2611d9ae7f2bSJakub Kicinski } 2612d9ae7f2bSJakub Kicinski 2613854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 2614854dc87dSJiong Wang 2615d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 2616d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2617d9ae7f2bSJakub Kicinski return nfp_prog->error; 2618d9ae7f2bSJakub Kicinski 2619ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 26201c03e03fSJakub Kicinski if (nfp_prog->error) 26211c03e03fSJakub Kicinski return nfp_prog->error; 26221c03e03fSJakub Kicinski 2623d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 2624d9ae7f2bSJakub Kicinski } 2625d9ae7f2bSJakub Kicinski 2626d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 2627d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 2628d9ae7f2bSJakub Kicinski { 2629d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2630d9ae7f2bSJakub Kicinski 2631d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2632d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 2633d9ae7f2bSJakub Kicinski 2634d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 2635d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 2636d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 2637d9ae7f2bSJakub Kicinski continue; 2638d9ae7f2bSJakub Kicinski 2639d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 2640d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 2641d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 2642d9ae7f2bSJakub Kicinski meta->skip = true; 2643d9ae7f2bSJakub Kicinski 2644d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 2645d9ae7f2bSJakub Kicinski if (!meta->skip) 2646d9ae7f2bSJakub Kicinski return; 2647d9ae7f2bSJakub Kicinski } 2648d9ae7f2bSJakub Kicinski } 2649d9ae7f2bSJakub Kicinski 2650d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 2651d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 2652d9ae7f2bSJakub Kicinski { 2653d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 2654d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 2655d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 2656d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 2657d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 2658d9ae7f2bSJakub Kicinski }; 2659d9ae7f2bSJakub Kicinski 2660d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 2661d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 2662d9ae7f2bSJakub Kicinski 2663d9ae7f2bSJakub Kicinski insn = meta1->insn; 2664d9ae7f2bSJakub Kicinski next = meta2->insn; 2665d9ae7f2bSJakub Kicinski 2666d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2667d9ae7f2bSJakub Kicinski continue; 2668d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2669d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2670d9ae7f2bSJakub Kicinski continue; 2671d9ae7f2bSJakub Kicinski 2672d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 2673d9ae7f2bSJakub Kicinski continue; 2674d9ae7f2bSJakub Kicinski 2675d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 2676d9ae7f2bSJakub Kicinski continue; 2677d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 2678d9ae7f2bSJakub Kicinski continue; 2679d9ae7f2bSJakub Kicinski 2680d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 2681d9ae7f2bSJakub Kicinski continue; 2682d9ae7f2bSJakub Kicinski 26831266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 26841266f5d6SJiong Wang continue; 26851266f5d6SJiong Wang 2686d9ae7f2bSJakub Kicinski meta2->skip = true; 2687d9ae7f2bSJakub Kicinski } 2688d9ae7f2bSJakub Kicinski } 2689d9ae7f2bSJakub Kicinski 2690d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 2691d9ae7f2bSJakub Kicinski { 2692d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 2693d9ae7f2bSJakub Kicinski 2694d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 2695d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 2696d9ae7f2bSJakub Kicinski 2697d9ae7f2bSJakub Kicinski insn = meta1->insn; 2698d9ae7f2bSJakub Kicinski next1 = meta2->insn; 2699d9ae7f2bSJakub Kicinski next2 = meta3->insn; 2700d9ae7f2bSJakub Kicinski 2701d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2702d9ae7f2bSJakub Kicinski continue; 2703d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2704d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2705d9ae7f2bSJakub Kicinski continue; 2706d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 2707d9ae7f2bSJakub Kicinski continue; 2708d9ae7f2bSJakub Kicinski 2709d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 2710d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 2711d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 2712d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 2713d9ae7f2bSJakub Kicinski continue; 2714d9ae7f2bSJakub Kicinski 2715d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 2716d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 2717d9ae7f2bSJakub Kicinski continue; 2718d9ae7f2bSJakub Kicinski 2719d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 2720d9ae7f2bSJakub Kicinski continue; 2721d9ae7f2bSJakub Kicinski 272229fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 272329fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 272429fe46efSJiong Wang continue; 272529fe46efSJiong Wang 2726d9ae7f2bSJakub Kicinski meta2->skip = true; 2727d9ae7f2bSJakub Kicinski meta3->skip = true; 2728d9ae7f2bSJakub Kicinski } 2729d9ae7f2bSJakub Kicinski } 2730d9ae7f2bSJakub Kicinski 27316bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 27326bc7103cSJiong Wang * 27336bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 27346bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 27356bc7103cSJiong Wang * 27366bc7103cSJiong Wang * The destination register of load and source register of store should 27376bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 27386bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 27396bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 27406bc7103cSJiong Wang */ 27416bc7103cSJiong Wang static bool 27426bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 27436bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 27446bc7103cSJiong Wang { 27456bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 27466bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 27476bc7103cSJiong Wang 27486bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 27496bc7103cSJiong Wang return false; 27506bc7103cSJiong Wang 27516bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 27526bc7103cSJiong Wang return false; 27536bc7103cSJiong Wang 27546bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 27556bc7103cSJiong Wang return false; 27566bc7103cSJiong Wang 27576bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 27586bc7103cSJiong Wang return false; 27596bc7103cSJiong Wang 27606bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 27616bc7103cSJiong Wang return false; 27626bc7103cSJiong Wang 27636bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 27646bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 27656bc7103cSJiong Wang return false; 27666bc7103cSJiong Wang 27676bc7103cSJiong Wang return true; 27686bc7103cSJiong Wang } 27696bc7103cSJiong Wang 27706bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 27716bc7103cSJiong Wang * 27726bc7103cSJiong Wang * - Their address base registers are the same. 27736bc7103cSJiong Wang * - Their address offsets are in the same order. 27746bc7103cSJiong Wang * - They operate at the same memory width. 27756bc7103cSJiong Wang * - There is no jump into the middle of them. 27766bc7103cSJiong Wang */ 27776bc7103cSJiong Wang static bool 27786bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 27796bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 27806bc7103cSJiong Wang struct bpf_insn *prev_ld, 27816bc7103cSJiong Wang struct bpf_insn *prev_st) 27826bc7103cSJiong Wang { 27836bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 27846bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 27856bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 27866bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 27876bc7103cSJiong Wang 27886bc7103cSJiong Wang /* This pair is the start pair. */ 27896bc7103cSJiong Wang if (!prev_ld) 27906bc7103cSJiong Wang return true; 27916bc7103cSJiong Wang 27926bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 27936bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 27946bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 27956bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 27966bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 27976bc7103cSJiong Wang prev_ld_off = prev_ld->off; 27986bc7103cSJiong Wang prev_st_off = prev_st->off; 27996bc7103cSJiong Wang 28006bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 28016bc7103cSJiong Wang return false; 28026bc7103cSJiong Wang 28036bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 28046bc7103cSJiong Wang return false; 28056bc7103cSJiong Wang 28066bc7103cSJiong Wang if (curr_size != prev_size) 28076bc7103cSJiong Wang return false; 28086bc7103cSJiong Wang 28096bc7103cSJiong Wang /* There is jump to the head of this pair. */ 28106bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 28116bc7103cSJiong Wang return false; 28126bc7103cSJiong Wang 28136bc7103cSJiong Wang /* Both in ascending order. */ 28146bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 28156bc7103cSJiong Wang prev_st_off + prev_size == st->off) 28166bc7103cSJiong Wang return true; 28176bc7103cSJiong Wang 28186bc7103cSJiong Wang /* Both in descending order. */ 28196bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 28206bc7103cSJiong Wang st->off + curr_size == prev_st_off) 28216bc7103cSJiong Wang return true; 28226bc7103cSJiong Wang 28236bc7103cSJiong Wang return false; 28246bc7103cSJiong Wang } 28256bc7103cSJiong Wang 28266bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 28276bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 28286bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 28296bc7103cSJiong Wang * as an memory copy. 28306bc7103cSJiong Wang */ 28316bc7103cSJiong Wang static bool 28326bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 28336bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 28346bc7103cSJiong Wang { 28356bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 28366bc7103cSJiong Wang 28376bc7103cSJiong Wang /* Different pointer types does not overlap. */ 28386bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 28396bc7103cSJiong Wang return false; 28406bc7103cSJiong Wang 28416bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 28426bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 28436bc7103cSJiong Wang return true; 28446bc7103cSJiong Wang 28456bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 28466bc7103cSJiong Wang * base register. 28476bc7103cSJiong Wang */ 28486bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 28496bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 28506bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 28516bc7103cSJiong Wang 28526bc7103cSJiong Wang /* Ascending order cross. */ 28536bc7103cSJiong Wang if (ld_off > head_ld_off && 28546bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 28556bc7103cSJiong Wang return true; 28566bc7103cSJiong Wang 28576bc7103cSJiong Wang /* Descending order cross. */ 28586bc7103cSJiong Wang if (ld_off < head_ld_off && 28596bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 28606bc7103cSJiong Wang return true; 28616bc7103cSJiong Wang 28626bc7103cSJiong Wang return false; 28636bc7103cSJiong Wang } 28646bc7103cSJiong Wang 28656bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 28666bc7103cSJiong Wang * 28676bc7103cSJiong Wang * load R, [regA + offA] 28686bc7103cSJiong Wang * store [regB + offB], R 28696bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 28706bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 28716bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 28726bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 28736bc7103cSJiong Wang * ... 28746bc7103cSJiong Wang * 28756bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 28766bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 28776bc7103cSJiong Wang */ 28786bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 28796bc7103cSJiong Wang { 28806bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 28816bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 28826bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 28836bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 28846bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 28856bc7103cSJiong Wang u8 count = 0; 28866bc7103cSJiong Wang 28876bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 28886bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 28896bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 28906bc7103cSJiong Wang 28916bc7103cSJiong Wang /* Reset record status if any of the following if true: 28926bc7103cSJiong Wang * - The current insn pair is not load/store. 28936bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 28946bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 28956bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 28966bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 28976bc7103cSJiong Wang * single NFP CPP command can transfer. 28986bc7103cSJiong Wang */ 28996bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 29006bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 29016bc7103cSJiong Wang prev_st) || 29026bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 29036bc7103cSJiong Wang head_st_meta) || 29046bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 29056bc7103cSJiong Wang if (!count) 29066bc7103cSJiong Wang continue; 29076bc7103cSJiong Wang 29086bc7103cSJiong Wang if (count > 1) { 29096bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 29106bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 29116bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 29126bc7103cSJiong Wang 29136bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 29146bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 29156bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 29166bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 29176bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 29186bc7103cSJiong Wang } 29196bc7103cSJiong Wang 29206bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 29216bc7103cSJiong Wang head_st_meta->skip = true; 29226bc7103cSJiong Wang } else { 29236bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 29246bc7103cSJiong Wang } 29256bc7103cSJiong Wang 29266bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 29276bc7103cSJiong Wang * could serve as the new head of the the next chain. 29286bc7103cSJiong Wang */ 29296bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 29306bc7103cSJiong Wang head_ld_meta = meta1; 29316bc7103cSJiong Wang head_st_meta = meta2; 29326bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 29336bc7103cSJiong Wang BPF_LDST_BYTES(ld); 29346bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 29356bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 29366bc7103cSJiong Wang prev_ld = ld; 29376bc7103cSJiong Wang prev_st = st; 29386bc7103cSJiong Wang count = 1; 29396bc7103cSJiong Wang } else { 29406bc7103cSJiong Wang head_ld_meta = NULL; 29416bc7103cSJiong Wang head_st_meta = NULL; 29426bc7103cSJiong Wang prev_ld = NULL; 29436bc7103cSJiong Wang prev_st = NULL; 29446bc7103cSJiong Wang count = 0; 29456bc7103cSJiong Wang } 29466bc7103cSJiong Wang 29476bc7103cSJiong Wang continue; 29486bc7103cSJiong Wang } 29496bc7103cSJiong Wang 29506bc7103cSJiong Wang if (!head_ld_meta) { 29516bc7103cSJiong Wang head_ld_meta = meta1; 29526bc7103cSJiong Wang head_st_meta = meta2; 29536bc7103cSJiong Wang } else { 29546bc7103cSJiong Wang meta1->skip = true; 29556bc7103cSJiong Wang meta2->skip = true; 29566bc7103cSJiong Wang } 29576bc7103cSJiong Wang 29586bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 29596bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 29606bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 29616bc7103cSJiong Wang prev_ld = ld; 29626bc7103cSJiong Wang prev_st = st; 29636bc7103cSJiong Wang count++; 29646bc7103cSJiong Wang } 29656bc7103cSJiong Wang } 29666bc7103cSJiong Wang 2967d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 2968d9ae7f2bSJakub Kicinski { 2969d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 2970d9ae7f2bSJakub Kicinski 2971d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 2972d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 29736bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 2974d9ae7f2bSJakub Kicinski 2975d9ae7f2bSJakub Kicinski return 0; 2976d9ae7f2bSJakub Kicinski } 2977d9ae7f2bSJakub Kicinski 29782314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 2979fd068ddcSJakub Kicinski { 29802314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 2981fd068ddcSJakub Kicinski int i; 2982fd068ddcSJakub Kicinski 29832314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 2984fd068ddcSJakub Kicinski int err; 2985fd068ddcSJakub Kicinski 29862314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 2987fd068ddcSJakub Kicinski if (err) 2988fd068ddcSJakub Kicinski return err; 2989fd068ddcSJakub Kicinski 29902314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 2991fd068ddcSJakub Kicinski } 2992fd068ddcSJakub Kicinski 2993fd068ddcSJakub Kicinski return 0; 2994fd068ddcSJakub Kicinski } 2995fd068ddcSJakub Kicinski 299644a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 299744a12eccSJakub Kicinski { 299844a12eccSJakub Kicinski void *prog; 299944a12eccSJakub Kicinski 300044a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 300144a12eccSJakub Kicinski if (!prog) 300244a12eccSJakub Kicinski return; 300344a12eccSJakub Kicinski 300444a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 300544a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 300644a12eccSJakub Kicinski kvfree(nfp_prog->prog); 300744a12eccSJakub Kicinski nfp_prog->prog = prog; 300844a12eccSJakub Kicinski } 300944a12eccSJakub Kicinski 3010c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3011d9ae7f2bSJakub Kicinski { 3012d9ae7f2bSJakub Kicinski int ret; 3013d9ae7f2bSJakub Kicinski 3014d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 3015d9ae7f2bSJakub Kicinski if (ret) 30169314c442SJakub Kicinski return ret; 3017d9ae7f2bSJakub Kicinski 3018d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 3019d9ae7f2bSJakub Kicinski if (ret) { 3020d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 3021d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 30229314c442SJakub Kicinski return -EINVAL; 3023d9ae7f2bSJakub Kicinski } 3024d9ae7f2bSJakub Kicinski 302544a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 302644a12eccSJakub Kicinski 30272314fe9eSJakub Kicinski return ret; 3028d9ae7f2bSJakub Kicinski } 30291549921dSJakub Kicinski 30301549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 30311549921dSJakub Kicinski { 30321549921dSJakub Kicinski struct nfp_insn_meta *meta; 30331549921dSJakub Kicinski 30341549921dSJakub Kicinski /* Another pass to record jump information. */ 30351549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 30361549921dSJakub Kicinski u64 code = meta->insn.code; 30371549921dSJakub Kicinski 30381549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 30391549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 30401549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 30411549921dSJakub Kicinski unsigned short dst_indx; 30421549921dSJakub Kicinski 30431549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 30441549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 30451549921dSJakub Kicinski cnt); 30461549921dSJakub Kicinski 30471549921dSJakub Kicinski meta->jmp_dst = dst_meta; 30481549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 30491549921dSJakub Kicinski } 30501549921dSJakub Kicinski } 30511549921dSJakub Kicinski } 30522314fe9eSJakub Kicinski 305374801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 305474801e50SQuentin Monnet { 305574801e50SQuentin Monnet return !!instr_cb[code]; 305674801e50SQuentin Monnet } 305774801e50SQuentin Monnet 30582314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 30592314fe9eSJakub Kicinski { 30602314fe9eSJakub Kicinski unsigned int i; 30612314fe9eSJakub Kicinski u64 *prog; 30622314fe9eSJakub Kicinski int err; 30632314fe9eSJakub Kicinski 30642314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 30652314fe9eSJakub Kicinski GFP_KERNEL); 30662314fe9eSJakub Kicinski if (!prog) 30672314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 30682314fe9eSJakub Kicinski 30692314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 30702314fe9eSJakub Kicinski enum nfp_relo_type special; 307177a3d311SJakub Kicinski u32 val; 30722314fe9eSJakub Kicinski 30732314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 30742314fe9eSJakub Kicinski switch (special) { 30752314fe9eSJakub Kicinski case RELO_NONE: 30762314fe9eSJakub Kicinski continue; 30772314fe9eSJakub Kicinski case RELO_BR_REL: 30782314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 30792314fe9eSJakub Kicinski break; 30802314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 30812314fe9eSJakub Kicinski br_set_offset(&prog[i], 30822314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 30832314fe9eSJakub Kicinski break; 30842314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 30852314fe9eSJakub Kicinski br_set_offset(&prog[i], 30862314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 30872314fe9eSJakub Kicinski break; 30882314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 30892314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 30902314fe9eSJakub Kicinski break; 309177a3d311SJakub Kicinski case RELO_BR_HELPER: 309277a3d311SJakub Kicinski val = br_get_offset(prog[i]); 309377a3d311SJakub Kicinski val -= BR_OFF_RELO; 309477a3d311SJakub Kicinski switch (val) { 309577a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 309677a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 309777a3d311SJakub Kicinski break; 309877a3d311SJakub Kicinski default: 309977a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 310077a3d311SJakub Kicinski val); 310177a3d311SJakub Kicinski err = -EINVAL; 310277a3d311SJakub Kicinski goto err_free_prog; 310377a3d311SJakub Kicinski } 310477a3d311SJakub Kicinski br_set_offset(&prog[i], val); 310577a3d311SJakub Kicinski break; 310677a3d311SJakub Kicinski case RELO_IMMED_REL: 310777a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 310877a3d311SJakub Kicinski break; 31092314fe9eSJakub Kicinski } 31102314fe9eSJakub Kicinski 31112314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 31122314fe9eSJakub Kicinski } 31132314fe9eSJakub Kicinski 31142314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 31152314fe9eSJakub Kicinski if (err) 31162314fe9eSJakub Kicinski goto err_free_prog; 31172314fe9eSJakub Kicinski 31182314fe9eSJakub Kicinski return prog; 31192314fe9eSJakub Kicinski 31202314fe9eSJakub Kicinski err_free_prog: 31212314fe9eSJakub Kicinski kfree(prog); 31222314fe9eSJakub Kicinski return ERR_PTR(err); 31232314fe9eSJakub Kicinski } 3124