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 5563dd43c33SJakub Kicinski static void 5573dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 5583dd43c33SJakub Kicinski swreg *rega, swreg *regb) 5593dd43c33SJakub Kicinski { 5603dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 5613dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 5623dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 5633dd43c33SJakub Kicinski return; 5643dd43c33SJakub Kicinski } 5653dd43c33SJakub Kicinski 5663dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 5673dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 5683dd43c33SJakub Kicinski reg_imm(0)); 5693dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 5703dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 5713dd43c33SJakub Kicinski } 5723dd43c33SJakub Kicinski 5739879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 5749879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 5759879a381SJiong Wang { 5769879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 5779879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 5789879a381SJiong Wang swreg src_base, off; 5793dd43c33SJakub Kicinski bool src_40bit_addr; 5809879a381SJiong Wang unsigned int i; 5819879a381SJiong Wang u8 xfer_num; 5829879a381SJiong Wang 5839879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 5843dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 5859879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 5869879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 5879879a381SJiong Wang 5883dd43c33SJakub Kicinski if (src_40bit_addr) 5893dd43c33SJakub Kicinski addr40_offset(nfp_prog, meta->insn.src_reg, off, &src_base, 5903dd43c33SJakub Kicinski &off); 5913dd43c33SJakub Kicinski 5928c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 5938c900538SJiong Wang if (len > 32) 5948c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 5958c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 5968c900538SJiong Wang 5979879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 5983dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 5993dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 6003dd43c33SJakub Kicinski src_base, off, xfer_num - 1, true, len > 32); 6019879a381SJiong Wang 6029879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 6039879a381SJiong Wang for (i = 0; i < xfer_num; i++) 6049879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 6059879a381SJiong Wang 6069879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 6079879a381SJiong Wang 6089879a381SJiong Wang if (len <= 8) { 6099879a381SJiong Wang /* Use single direct_ref write8. */ 6109879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6119879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 6129879a381SJiong Wang true); 6138c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 6149879a381SJiong Wang /* Use single direct_ref write32. */ 6159879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6169879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 6179879a381SJiong Wang true); 6188c900538SJiong Wang } else if (len <= 32) { 6199879a381SJiong Wang /* Use single indirect_ref write8. */ 6209879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 6219879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 6229879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6239879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6249879a381SJiong Wang len - 1, true); 6258c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 6268c900538SJiong Wang /* Use single indirect_ref write32. */ 6278c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6288c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6298c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6308c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6318c900538SJiong Wang xfer_num - 1, true); 6328c900538SJiong Wang } else if (len <= 40) { 6338c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 6348c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 6358c900538SJiong Wang */ 6368c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6378c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 6388c900538SJiong Wang true); 6398c900538SJiong Wang 6408c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 6418c900538SJiong Wang imm_b(nfp_prog)); 6428c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 6438c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 6448c900538SJiong Wang true); 6458c900538SJiong Wang } else { 6468c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 6478c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 6488c900538SJiong Wang */ 6498c900538SJiong Wang u8 new_off; 6508c900538SJiong Wang 6518c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6528c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 6538c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6548c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 6558c900538SJiong Wang xfer_num - 2, true); 6568c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 6578c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 6588c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 6598c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 6608c900538SJiong Wang (len & 0x3) - 1, true); 6619879a381SJiong Wang } 6629879a381SJiong Wang 6639879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 6649879a381SJiong Wang * before and after we do memory copy optimization. 6659879a381SJiong Wang * 6669879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 6679879a381SJiong Wang * need to make sure it is loaded with the value the same as before 6689879a381SJiong Wang * this transformation. 6699879a381SJiong Wang * 6709879a381SJiong Wang * These extra loads could be removed once we have accurate register 6719879a381SJiong Wang * usage information. 6729879a381SJiong Wang */ 6739879a381SJiong Wang if (descending_seq) 6749879a381SJiong Wang xfer_num = 0; 6759879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 6769879a381SJiong Wang xfer_num = xfer_num - 1; 6779879a381SJiong Wang else 6789879a381SJiong Wang xfer_num = xfer_num - 2; 6799879a381SJiong Wang 6809879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 6819879a381SJiong Wang case BPF_B: 6829879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6839879a381SJiong Wang reg_xfer(xfer_num), 1, 6849879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 6859879a381SJiong Wang break; 6869879a381SJiong Wang case BPF_H: 6879879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6889879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 6899879a381SJiong Wang break; 6909879a381SJiong Wang case BPF_W: 6919879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6929879a381SJiong Wang reg_xfer(0)); 6939879a381SJiong Wang break; 6949879a381SJiong Wang case BPF_DW: 6959879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 6969879a381SJiong Wang reg_xfer(xfer_num)); 6979879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 6989879a381SJiong Wang reg_xfer(xfer_num + 1)); 6999879a381SJiong Wang break; 7009879a381SJiong Wang } 7019879a381SJiong Wang 7029879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 7039879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 7049879a381SJiong Wang 7059879a381SJiong Wang return 0; 7069879a381SJiong Wang } 7079879a381SJiong Wang 708d9ae7f2bSJakub Kicinski static int 7090a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 710d9ae7f2bSJakub Kicinski { 711d9ae7f2bSJakub Kicinski unsigned int i; 712d9ae7f2bSJakub Kicinski u16 shift, sz; 713d9ae7f2bSJakub Kicinski 714d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 715d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 716d9ae7f2bSJakub Kicinski */ 7170a793977SJakub Kicinski sz = max(size, 4); 718d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 719d9ae7f2bSJakub Kicinski 7200a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 7210a793977SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, true); 7220a793977SJakub Kicinski 7230a793977SJakub Kicinski i = 0; 7240a793977SJakub Kicinski if (shift) 7250a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 7260a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 7270a793977SJakub Kicinski else 7280a793977SJakub Kicinski for (; i * 4 < size; i++) 7290a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7300a793977SJakub Kicinski 7310a793977SJakub Kicinski if (i < 2) 7320a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7330a793977SJakub Kicinski 7340a793977SJakub Kicinski return 0; 7350a793977SJakub Kicinski } 7360a793977SJakub Kicinski 7370a793977SJakub Kicinski static int 7383dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 7393dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 7402ca71441SJakub Kicinski { 7412ca71441SJakub Kicinski unsigned int i; 7422ca71441SJakub Kicinski u8 mask, sz; 7432ca71441SJakub Kicinski 7443dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 7452ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 7462ca71441SJakub Kicinski */ 7472ca71441SJakub Kicinski sz = max(size, 4); 7482ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 7492ca71441SJakub Kicinski 7503dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 7513dd43c33SJakub Kicinski lreg, rreg, sz / 4 - 1, true); 7522ca71441SJakub Kicinski 7532ca71441SJakub Kicinski i = 0; 7542ca71441SJakub Kicinski if (mask) 7552ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 7562ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 7572ca71441SJakub Kicinski else 7582ca71441SJakub Kicinski for (; i * 4 < size; i++) 7592ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7602ca71441SJakub Kicinski 7612ca71441SJakub Kicinski if (i < 2) 7622ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7632ca71441SJakub Kicinski 7642ca71441SJakub Kicinski return 0; 7652ca71441SJakub Kicinski } 7662ca71441SJakub Kicinski 7672ca71441SJakub Kicinski static int 7683dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7693dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7703dd43c33SJakub Kicinski { 7713dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 7723dd43c33SJakub Kicinski size, CMD_MODE_32b); 7733dd43c33SJakub Kicinski } 7743dd43c33SJakub Kicinski 7753dd43c33SJakub Kicinski static int 7763dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7773dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7783dd43c33SJakub Kicinski { 7793dd43c33SJakub Kicinski swreg rega, regb; 7803dd43c33SJakub Kicinski 7813dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 7823dd43c33SJakub Kicinski 7833dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 7843dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 7853dd43c33SJakub Kicinski } 7863dd43c33SJakub Kicinski 7873dd43c33SJakub Kicinski static int 7880a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 7890a793977SJakub Kicinski { 7900a793977SJakub Kicinski swreg tmp_reg; 7910a793977SJakub Kicinski 792d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 793d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 7940a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 7950a793977SJakub Kicinski 796d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 797d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 798d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 799d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 80018e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 801e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8020a793977SJakub Kicinski 803d9ae7f2bSJakub Kicinski /* Load data */ 8040a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 805d9ae7f2bSJakub Kicinski } 806d9ae7f2bSJakub Kicinski 807d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 808d9ae7f2bSJakub Kicinski { 8090a793977SJakub Kicinski swreg tmp_reg; 8100a793977SJakub Kicinski 8110a793977SJakub Kicinski /* Check packet length */ 8120a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 8130a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 814e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8150a793977SJakub Kicinski 8160a793977SJakub Kicinski /* Load data */ 8170a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8180a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 819d9ae7f2bSJakub Kicinski } 820d9ae7f2bSJakub Kicinski 821e663fe38SJakub Kicinski static int 822e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 823e663fe38SJakub Kicinski u8 src_gpr, u8 size) 824e663fe38SJakub Kicinski { 825e663fe38SJakub Kicinski unsigned int i; 826e663fe38SJakub Kicinski 827e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 828e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 829e663fe38SJakub Kicinski 830e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 831e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 832e663fe38SJakub Kicinski 833e663fe38SJakub Kicinski return 0; 834e663fe38SJakub Kicinski } 835e663fe38SJakub Kicinski 836e663fe38SJakub Kicinski static int 837e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 838e663fe38SJakub Kicinski u64 imm, u8 size) 839e663fe38SJakub Kicinski { 840e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 841e663fe38SJakub Kicinski if (size == 8) 842e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 843e663fe38SJakub Kicinski 844e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 845e663fe38SJakub Kicinski reg_a(dst_gpr), offset, size - 1, true); 846e663fe38SJakub Kicinski 847e663fe38SJakub Kicinski return 0; 848e663fe38SJakub Kicinski } 849e663fe38SJakub Kicinski 850ee9133a8SJakub Kicinski typedef int 851ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 8522df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8532df03a50SJakub Kicinski bool needs_inc); 854a82b23fbSJakub Kicinski 855a82b23fbSJakub Kicinski static int 856a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 8572df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8582df03a50SJakub Kicinski bool needs_inc) 859a82b23fbSJakub Kicinski { 8602df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 861a82b23fbSJakub Kicinski u32 idx, src_byte; 862a82b23fbSJakub Kicinski enum shf_sc sc; 863a82b23fbSJakub Kicinski swreg reg; 864a82b23fbSJakub Kicinski int shf; 865a82b23fbSJakub Kicinski u8 mask; 866a82b23fbSJakub Kicinski 867a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 868a82b23fbSJakub Kicinski return -EOPNOTSUPP; 869a82b23fbSJakub Kicinski 870a82b23fbSJakub Kicinski idx = off / 4; 871a82b23fbSJakub Kicinski 872a82b23fbSJakub Kicinski /* Move the entire word */ 873a82b23fbSJakub Kicinski if (size == 4) { 8742df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 8752df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 876a82b23fbSJakub Kicinski return 0; 877a82b23fbSJakub Kicinski } 878a82b23fbSJakub Kicinski 8792df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8802df03a50SJakub Kicinski return -EOPNOTSUPP; 8812df03a50SJakub Kicinski 882a82b23fbSJakub Kicinski src_byte = off % 4; 883a82b23fbSJakub Kicinski 884a82b23fbSJakub Kicinski mask = (1 << size) - 1; 885a82b23fbSJakub Kicinski mask <<= dst_byte; 886a82b23fbSJakub Kicinski 887a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 888a82b23fbSJakub Kicinski return -EOPNOTSUPP; 889a82b23fbSJakub Kicinski 890a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 891a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 892a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 893a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 894a82b23fbSJakub Kicinski shf = 32 - shf; 895a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 896a82b23fbSJakub Kicinski } else { 897a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 898a82b23fbSJakub Kicinski } 899a82b23fbSJakub Kicinski 900a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 901a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 902a82b23fbSJakub Kicinski */ 903a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9042df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 905a82b23fbSJakub Kicinski } else { 906a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 9079a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 9089a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 9099a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 9109a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 9119a90c83cSJakub Kicinski */ 9129a90c83cSJakub Kicinski if (first || !new_gpr) 913a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 914a82b23fbSJakub Kicinski } 915a82b23fbSJakub Kicinski 916a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 917a82b23fbSJakub Kicinski 9182df03a50SJakub Kicinski if (should_inc) 9192df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9202df03a50SJakub Kicinski 921a82b23fbSJakub Kicinski return 0; 922a82b23fbSJakub Kicinski } 923ee9133a8SJakub Kicinski 924ee9133a8SJakub Kicinski static int 925ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 9262df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9272df03a50SJakub Kicinski bool needs_inc) 928ee9133a8SJakub Kicinski { 9292df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 930ee9133a8SJakub Kicinski u32 idx, dst_byte; 931ee9133a8SJakub Kicinski enum shf_sc sc; 932ee9133a8SJakub Kicinski swreg reg; 933ee9133a8SJakub Kicinski int shf; 934ee9133a8SJakub Kicinski u8 mask; 935ee9133a8SJakub Kicinski 936ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 937ee9133a8SJakub Kicinski return -EOPNOTSUPP; 938ee9133a8SJakub Kicinski 939ee9133a8SJakub Kicinski idx = off / 4; 940ee9133a8SJakub Kicinski 941ee9133a8SJakub Kicinski /* Move the entire word */ 942ee9133a8SJakub Kicinski if (size == 4) { 9432df03a50SJakub Kicinski wrp_mov(nfp_prog, 9442df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 9452df03a50SJakub Kicinski reg_b(src)); 946ee9133a8SJakub Kicinski return 0; 947ee9133a8SJakub Kicinski } 948ee9133a8SJakub Kicinski 9492df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9502df03a50SJakub Kicinski return -EOPNOTSUPP; 9512df03a50SJakub Kicinski 952ee9133a8SJakub Kicinski dst_byte = off % 4; 953ee9133a8SJakub Kicinski 954ee9133a8SJakub Kicinski mask = (1 << size) - 1; 955ee9133a8SJakub Kicinski mask <<= dst_byte; 956ee9133a8SJakub Kicinski 957ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 958ee9133a8SJakub Kicinski return -EOPNOTSUPP; 959ee9133a8SJakub Kicinski 960ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 961ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 962ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 963ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 964ee9133a8SJakub Kicinski shf = 32 - shf; 965ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 966ee9133a8SJakub Kicinski } else { 967ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 968ee9133a8SJakub Kicinski } 969ee9133a8SJakub Kicinski 970ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 971ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 972ee9133a8SJakub Kicinski */ 973ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9742df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 975ee9133a8SJakub Kicinski } else { 976ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 9779a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 9789a90c83cSJakub Kicinski * the middle location will be overwritten fully. 9799a90c83cSJakub Kicinski */ 9809a90c83cSJakub Kicinski if (first || last) 981ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 982ee9133a8SJakub Kicinski } 983ee9133a8SJakub Kicinski 984ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 985ee9133a8SJakub Kicinski 9869a90c83cSJakub Kicinski if (new_gpr || last) { 987ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 988ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 9892df03a50SJakub Kicinski if (should_inc) 9902df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9919a90c83cSJakub Kicinski } 992ee9133a8SJakub Kicinski 993ee9133a8SJakub Kicinski return 0; 994ee9133a8SJakub Kicinski } 995ee9133a8SJakub Kicinski 996ee9133a8SJakub Kicinski static int 997ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 998b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 999b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1000ee9133a8SJakub Kicinski { 1001d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 10029a90c83cSJakub Kicinski bool first = true, last; 10032df03a50SJakub Kicinski bool needs_inc = false; 10042df03a50SJakub Kicinski swreg stack_off_reg; 1005a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1006ee9133a8SJakub Kicinski u32 gpr_byte = 0; 10072df03a50SJakub Kicinski bool lm3 = true; 1008ee9133a8SJakub Kicinski int ret; 1009ee9133a8SJakub Kicinski 1010b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1011b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1012b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1013b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1014b14157eeSJakub Kicinski */ 1015b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1016b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1017b14157eeSJakub Kicinski 1018b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1019b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1020b14157eeSJakub Kicinski 1021b14157eeSJakub Kicinski needs_inc = true; 1022b14157eeSJakub Kicinski } else if (off + size <= 64) { 10232df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 10242df03a50SJakub Kicinski lm3 = false; 10252df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 10262df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 10272df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 10282df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 10292df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 10302df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 10312df03a50SJakub Kicinski */ 10322df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 10332df03a50SJakub Kicinski stack_imm(nfp_prog)); 10342df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10352df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10362df03a50SJakub Kicinski 10372df03a50SJakub Kicinski off %= 32; 10382df03a50SJakub Kicinski } else { 10392df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 10402df03a50SJakub Kicinski stack_imm(nfp_prog)); 10412df03a50SJakub Kicinski 10422df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10432df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10442df03a50SJakub Kicinski 10452df03a50SJakub Kicinski needs_inc = true; 10462df03a50SJakub Kicinski } 10472df03a50SJakub Kicinski if (lm3) { 10482df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 10492df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 10502df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 10512df03a50SJakub Kicinski } 10522df03a50SJakub Kicinski 1053a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1054a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1055a82b23fbSJakub Kicinski 1056ee9133a8SJakub Kicinski while (size) { 1057ee9133a8SJakub Kicinski u32 slice_end; 1058ee9133a8SJakub Kicinski u8 slice_size; 1059ee9133a8SJakub Kicinski 1060ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1061ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1062ee9133a8SJakub Kicinski slice_size = slice_end - off; 1063ee9133a8SJakub Kicinski 10649a90c83cSJakub Kicinski last = slice_size == size; 10659a90c83cSJakub Kicinski 10662df03a50SJakub Kicinski if (needs_inc) 10672df03a50SJakub Kicinski off %= 4; 10682df03a50SJakub Kicinski 1069a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 10702df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1071ee9133a8SJakub Kicinski if (ret) 1072ee9133a8SJakub Kicinski return ret; 1073ee9133a8SJakub Kicinski 1074a82b23fbSJakub Kicinski prev_gpr = gpr; 10759a90c83cSJakub Kicinski first = false; 10769a90c83cSJakub Kicinski 1077ee9133a8SJakub Kicinski gpr_byte += slice_size; 1078ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1079ee9133a8SJakub Kicinski gpr_byte -= 4; 1080ee9133a8SJakub Kicinski gpr++; 1081ee9133a8SJakub Kicinski } 1082ee9133a8SJakub Kicinski 1083ee9133a8SJakub Kicinski size -= slice_size; 1084ee9133a8SJakub Kicinski off += slice_size; 1085ee9133a8SJakub Kicinski } 1086ee9133a8SJakub Kicinski 1087ee9133a8SJakub Kicinski return 0; 1088ee9133a8SJakub Kicinski } 1089ee9133a8SJakub Kicinski 1090d9ae7f2bSJakub Kicinski static void 1091d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1092d9ae7f2bSJakub Kicinski { 1093b3f868dfSJakub Kicinski swreg tmp_reg; 1094d9ae7f2bSJakub Kicinski 1095d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1096d9ae7f2bSJakub Kicinski if (!imm) 1097d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1098d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1099d9ae7f2bSJakub Kicinski return; 1100d9ae7f2bSJakub Kicinski } 1101d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1102d9ae7f2bSJakub Kicinski if (!~imm) 1103d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1104d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1105d9ae7f2bSJakub Kicinski return; 1106d9ae7f2bSJakub Kicinski } 1107d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1108d9ae7f2bSJakub Kicinski if (!~imm) 1109d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 11105d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1111d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1112d9ae7f2bSJakub Kicinski return; 1113d9ae7f2bSJakub Kicinski } 1114d9ae7f2bSJakub Kicinski 1115d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1116d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1117d9ae7f2bSJakub Kicinski } 1118d9ae7f2bSJakub Kicinski 1119d9ae7f2bSJakub Kicinski static int 1120d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1121d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1122d9ae7f2bSJakub Kicinski { 1123d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1124d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1125d9ae7f2bSJakub Kicinski 1126d9ae7f2bSJakub Kicinski if (skip) { 1127d9ae7f2bSJakub Kicinski meta->skip = true; 1128d9ae7f2bSJakub Kicinski return 0; 1129d9ae7f2bSJakub Kicinski } 1130d9ae7f2bSJakub Kicinski 1131d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1132d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1133d9ae7f2bSJakub Kicinski 1134d9ae7f2bSJakub Kicinski return 0; 1135d9ae7f2bSJakub Kicinski } 1136d9ae7f2bSJakub Kicinski 1137d9ae7f2bSJakub Kicinski static int 1138d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1139d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1140d9ae7f2bSJakub Kicinski { 1141d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1142d9ae7f2bSJakub Kicinski 1143d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1144d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1145d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1146d9ae7f2bSJakub Kicinski 1147d9ae7f2bSJakub Kicinski return 0; 1148d9ae7f2bSJakub Kicinski } 1149d9ae7f2bSJakub Kicinski 1150d9ae7f2bSJakub Kicinski static int 1151d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1152d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1153d9ae7f2bSJakub Kicinski { 1154d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1155d9ae7f2bSJakub Kicinski 1156d9ae7f2bSJakub Kicinski if (skip) { 1157d9ae7f2bSJakub Kicinski meta->skip = true; 1158d9ae7f2bSJakub Kicinski return 0; 1159d9ae7f2bSJakub Kicinski } 1160d9ae7f2bSJakub Kicinski 1161d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1162d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1163d9ae7f2bSJakub Kicinski 1164d9ae7f2bSJakub Kicinski return 0; 1165d9ae7f2bSJakub Kicinski } 1166d9ae7f2bSJakub Kicinski 1167d9ae7f2bSJakub Kicinski static int 1168d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1169d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1170d9ae7f2bSJakub Kicinski { 1171d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1172d9ae7f2bSJakub Kicinski 1173d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1174d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1175d9ae7f2bSJakub Kicinski 1176d9ae7f2bSJakub Kicinski return 0; 1177d9ae7f2bSJakub Kicinski } 1178d9ae7f2bSJakub Kicinski 1179d9ae7f2bSJakub Kicinski static void 1180d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1181d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1182d9ae7f2bSJakub Kicinski { 1183d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1184d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1185d9ae7f2bSJakub Kicinski } 1186d9ae7f2bSJakub Kicinski 1187d9ae7f2bSJakub Kicinski static int 1188d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1189d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1190d9ae7f2bSJakub Kicinski { 1191d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1192d9ae7f2bSJakub Kicinski 1193d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1194d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1195d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1196d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1197d9ae7f2bSJakub Kicinski 1198d9ae7f2bSJakub Kicinski return 0; 1199d9ae7f2bSJakub Kicinski } 1200d9ae7f2bSJakub Kicinski 1201d9ae7f2bSJakub Kicinski static int 1202d9ae7f2bSJakub Kicinski wrp_cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1203d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1204d9ae7f2bSJakub Kicinski { 1205d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1206d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1207d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1208b3f868dfSJakub Kicinski swreg tmp_reg; 1209d9ae7f2bSJakub Kicinski 1210d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 1211d9ae7f2bSJakub Kicinski if (!swap) 1212d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), ALU_OP_SUB, tmp_reg); 1213d9ae7f2bSJakub Kicinski else 1214d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, ALU_OP_SUB, reg_a(reg)); 1215d9ae7f2bSJakub Kicinski 1216d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 1217d9ae7f2bSJakub Kicinski if (!swap) 1218d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1219d9ae7f2bSJakub Kicinski reg_a(reg + 1), ALU_OP_SUB_C, tmp_reg); 1220d9ae7f2bSJakub Kicinski else 1221d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1222d9ae7f2bSJakub Kicinski tmp_reg, ALU_OP_SUB_C, reg_a(reg + 1)); 1223d9ae7f2bSJakub Kicinski 1224d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1225d9ae7f2bSJakub Kicinski 1226d9ae7f2bSJakub Kicinski return 0; 1227d9ae7f2bSJakub Kicinski } 1228d9ae7f2bSJakub Kicinski 1229d9ae7f2bSJakub Kicinski static int 1230d9ae7f2bSJakub Kicinski wrp_cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1231d9ae7f2bSJakub Kicinski enum br_mask br_mask, bool swap) 1232d9ae7f2bSJakub Kicinski { 1233d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 123426fa818dSJakub Kicinski u8 areg, breg; 123526fa818dSJakub Kicinski 123626fa818dSJakub Kicinski areg = insn->dst_reg * 2; 123726fa818dSJakub Kicinski breg = insn->src_reg * 2; 1238d9ae7f2bSJakub Kicinski 1239d9ae7f2bSJakub Kicinski if (swap) { 1240d9ae7f2bSJakub Kicinski areg ^= breg; 1241d9ae7f2bSJakub Kicinski breg ^= areg; 1242d9ae7f2bSJakub Kicinski areg ^= breg; 1243d9ae7f2bSJakub Kicinski } 1244d9ae7f2bSJakub Kicinski 1245d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1246d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1247d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 1248d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, insn->off, 0); 1249d9ae7f2bSJakub Kicinski 1250d9ae7f2bSJakub Kicinski return 0; 1251d9ae7f2bSJakub Kicinski } 1252d9ae7f2bSJakub Kicinski 12533119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 12543119d1fdSJakub Kicinski { 12553119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 12563119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 12573119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 12583119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 12593119d1fdSJakub Kicinski } 12603119d1fdSJakub Kicinski 12610d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 12620d49eaf4SJakub Kicinski { 12630d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 12640d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 12650d49eaf4SJakub Kicinski u32 ret_einval, end; 12660d49eaf4SJakub Kicinski 12670d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 12680d49eaf4SJakub Kicinski 12698231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 12708231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 12718231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 12728231f844SJakub Kicinski return -EINVAL; 12738231f844SJakub Kicinski 12748231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 12758231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 12768231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 12778231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12788231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 12798231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 12808231f844SJakub Kicinski 12818231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 12828231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 12838231f844SJakub Kicinski 12848231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 12858231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 12868231f844SJakub Kicinski */ 12878231f844SJakub Kicinski 12888231f844SJakub Kicinski return 0; 12898231f844SJakub Kicinski } 12908231f844SJakub Kicinski 12910d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 12920d49eaf4SJakub Kicinski end = ret_einval + 2; 12930d49eaf4SJakub Kicinski 12940d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 12950d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 12960d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 12970d49eaf4SJakub Kicinski 12980d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 12990d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13000d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 13010d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13020d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13030d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 13040d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13050d49eaf4SJakub Kicinski 13060d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 13070d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 13080d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13090d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13100d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 13110d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 13120d49eaf4SJakub Kicinski 13130d49eaf4SJakub Kicinski /* Load the ret code */ 13140d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 13150d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 13160d49eaf4SJakub Kicinski 13170d49eaf4SJakub Kicinski /* Modify the packet metadata */ 13180d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 13190d49eaf4SJakub Kicinski 13200d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 13212314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 13220d49eaf4SJakub Kicinski 13230d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13240d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13250d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 13260d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13270d49eaf4SJakub Kicinski 13280d49eaf4SJakub Kicinski /* return -EINVAL target */ 13290d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 13300d49eaf4SJakub Kicinski return -EINVAL; 13310d49eaf4SJakub Kicinski 13320d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 13330d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 13340d49eaf4SJakub Kicinski 13350d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 13360d49eaf4SJakub Kicinski return -EINVAL; 13370d49eaf4SJakub Kicinski 13380d49eaf4SJakub Kicinski return 0; 13390d49eaf4SJakub Kicinski } 13400d49eaf4SJakub Kicinski 134177a3d311SJakub Kicinski static int 134277a3d311SJakub Kicinski map_lookup_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 134377a3d311SJakub Kicinski { 134477a3d311SJakub Kicinski struct bpf_offloaded_map *offmap; 134577a3d311SJakub Kicinski struct nfp_bpf_map *nfp_map; 134677a3d311SJakub Kicinski bool load_lm_ptr; 134777a3d311SJakub Kicinski u32 ret_tgt; 134877a3d311SJakub Kicinski s64 lm_off; 134977a3d311SJakub Kicinski swreg tid; 135077a3d311SJakub Kicinski 135177a3d311SJakub Kicinski offmap = (struct bpf_offloaded_map *)meta->arg1.map_ptr; 135277a3d311SJakub Kicinski nfp_map = offmap->dev_priv; 135377a3d311SJakub Kicinski 135477a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 135577a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 135677a3d311SJakub Kicinski lm_off += meta->arg2.var_off.value + meta->arg2.off; 135777a3d311SJakub Kicinski load_lm_ptr = meta->arg2_var_off || lm_off; 135877a3d311SJakub Kicinski 135977a3d311SJakub Kicinski /* Set LM0 to start of key */ 136077a3d311SJakub Kicinski if (load_lm_ptr) 136177a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 136277a3d311SJakub Kicinski 136377a3d311SJakub Kicinski /* Load map ID into a register, it should actually fit as an immediate 136477a3d311SJakub Kicinski * but in case it doesn't deal with it here, not in the delay slots. 136577a3d311SJakub Kicinski */ 136677a3d311SJakub Kicinski tid = ur_load_imm_any(nfp_prog, nfp_map->tid, imm_a(nfp_prog)); 136777a3d311SJakub Kicinski 136877a3d311SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + BPF_FUNC_map_lookup_elem, 136977a3d311SJakub Kicinski 2, RELO_BR_HELPER); 137077a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 137177a3d311SJakub Kicinski 137277a3d311SJakub Kicinski /* Load map ID into A0 */ 137377a3d311SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), tid); 137477a3d311SJakub Kicinski 137577a3d311SJakub Kicinski /* Load the return address into B0 */ 137677a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 137777a3d311SJakub Kicinski 137877a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 137977a3d311SJakub Kicinski return -EINVAL; 138077a3d311SJakub Kicinski 138177a3d311SJakub Kicinski /* Reset the LM0 pointer */ 138277a3d311SJakub Kicinski if (!load_lm_ptr) 138377a3d311SJakub Kicinski return 0; 138477a3d311SJakub Kicinski 138577a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 138677a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 138777a3d311SJakub Kicinski 138877a3d311SJakub Kicinski return 0; 138977a3d311SJakub Kicinski } 139077a3d311SJakub Kicinski 1391d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1392d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1393d9ae7f2bSJakub Kicinski { 1394d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1395b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1396b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1397d9ae7f2bSJakub Kicinski 1398b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1399b14157eeSJakub Kicinski swreg stack_depth_reg; 1400b14157eeSJakub Kicinski 1401b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1402b14157eeSJakub Kicinski nfp_prog->stack_depth, 1403b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1404b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1405b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1406b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1407b14157eeSJakub Kicinski } else { 1408b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1409b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1410b14157eeSJakub Kicinski } 1411d9ae7f2bSJakub Kicinski 1412d9ae7f2bSJakub Kicinski return 0; 1413d9ae7f2bSJakub Kicinski } 1414d9ae7f2bSJakub Kicinski 1415d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1416d9ae7f2bSJakub Kicinski { 1417d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1418d9ae7f2bSJakub Kicinski 1419d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1420d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1421d9ae7f2bSJakub Kicinski 1422d9ae7f2bSJakub Kicinski return 0; 1423d9ae7f2bSJakub Kicinski } 1424d9ae7f2bSJakub Kicinski 1425d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1426d9ae7f2bSJakub Kicinski { 1427d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1428d9ae7f2bSJakub Kicinski } 1429d9ae7f2bSJakub Kicinski 1430d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1431d9ae7f2bSJakub Kicinski { 1432d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1433d9ae7f2bSJakub Kicinski } 1434d9ae7f2bSJakub Kicinski 1435d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1436d9ae7f2bSJakub Kicinski { 1437d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1438d9ae7f2bSJakub Kicinski } 1439d9ae7f2bSJakub Kicinski 1440d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1441d9ae7f2bSJakub Kicinski { 1442d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1443d9ae7f2bSJakub Kicinski } 1444d9ae7f2bSJakub Kicinski 1445d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1446d9ae7f2bSJakub Kicinski { 1447d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1448d9ae7f2bSJakub Kicinski } 1449d9ae7f2bSJakub Kicinski 1450d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1451d9ae7f2bSJakub Kicinski { 1452d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1453d9ae7f2bSJakub Kicinski } 1454d9ae7f2bSJakub Kicinski 1455d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1456d9ae7f2bSJakub Kicinski { 1457d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1458d9ae7f2bSJakub Kicinski 1459d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1460d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1461d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1462d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1463d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1464d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1465d9ae7f2bSJakub Kicinski 1466d9ae7f2bSJakub Kicinski return 0; 1467d9ae7f2bSJakub Kicinski } 1468d9ae7f2bSJakub Kicinski 1469d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1470d9ae7f2bSJakub Kicinski { 1471d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1472d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1473d9ae7f2bSJakub Kicinski 1474d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1475d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1476d9ae7f2bSJakub Kicinski 1477d9ae7f2bSJakub Kicinski return 0; 1478d9ae7f2bSJakub Kicinski } 1479d9ae7f2bSJakub Kicinski 1480d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1481d9ae7f2bSJakub Kicinski { 1482d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1483d9ae7f2bSJakub Kicinski 1484d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1485d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1486d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1487d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1488d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1489d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1490d9ae7f2bSJakub Kicinski 1491d9ae7f2bSJakub Kicinski return 0; 1492d9ae7f2bSJakub Kicinski } 1493d9ae7f2bSJakub Kicinski 1494d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1495d9ae7f2bSJakub Kicinski { 1496d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1497d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1498d9ae7f2bSJakub Kicinski 1499d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1500d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1501d9ae7f2bSJakub Kicinski 1502d9ae7f2bSJakub Kicinski return 0; 1503d9ae7f2bSJakub Kicinski } 1504d9ae7f2bSJakub Kicinski 1505254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1506254ef4d7SJiong Wang { 1507254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1508254ef4d7SJiong Wang 1509254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1510254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1511254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1512254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1513254ef4d7SJiong Wang 1514254ef4d7SJiong Wang return 0; 1515254ef4d7SJiong Wang } 1516254ef4d7SJiong Wang 1517d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1518d9ae7f2bSJakub Kicinski { 1519d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15203cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1521d9ae7f2bSJakub Kicinski 15223cae1319SJakub Kicinski if (insn->imm < 32) { 15233cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15243cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15253cae1319SJakub Kicinski SHF_SC_R_DSHF, 32 - insn->imm); 15263cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15273cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15283cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm); 15293cae1319SJakub Kicinski } else if (insn->imm == 32) { 15303cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, dst); 15313cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15323cae1319SJakub Kicinski } else if (insn->imm > 32) { 15333cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15343cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 15353cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm - 32); 15363cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 15373cae1319SJakub Kicinski } 1538d9ae7f2bSJakub Kicinski 1539d9ae7f2bSJakub Kicinski return 0; 1540d9ae7f2bSJakub Kicinski } 1541d9ae7f2bSJakub Kicinski 1542d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1543d9ae7f2bSJakub Kicinski { 1544d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 15453cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1546d9ae7f2bSJakub Kicinski 15473cae1319SJakub Kicinski if (insn->imm < 32) { 15483cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15493cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 15503cae1319SJakub Kicinski SHF_SC_R_DSHF, insn->imm); 15513cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 15523cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15533cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm); 15543cae1319SJakub Kicinski } else if (insn->imm == 32) { 15553cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst, dst + 1); 15563cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15573cae1319SJakub Kicinski } else if (insn->imm > 32) { 15583cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 15593cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 15603cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm - 32); 15613cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 15623cae1319SJakub Kicinski } 1563d9ae7f2bSJakub Kicinski 1564d9ae7f2bSJakub Kicinski return 0; 1565d9ae7f2bSJakub Kicinski } 1566d9ae7f2bSJakub Kicinski 1567d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1568d9ae7f2bSJakub Kicinski { 1569d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1570d9ae7f2bSJakub Kicinski 1571d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1572d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1573d9ae7f2bSJakub Kicinski 1574d9ae7f2bSJakub Kicinski return 0; 1575d9ae7f2bSJakub Kicinski } 1576d9ae7f2bSJakub Kicinski 1577d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1578d9ae7f2bSJakub Kicinski { 1579d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1580d9ae7f2bSJakub Kicinski 1581d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1582d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1583d9ae7f2bSJakub Kicinski 1584d9ae7f2bSJakub Kicinski return 0; 1585d9ae7f2bSJakub Kicinski } 1586d9ae7f2bSJakub Kicinski 1587d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1588d9ae7f2bSJakub Kicinski { 1589d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1590d9ae7f2bSJakub Kicinski } 1591d9ae7f2bSJakub Kicinski 1592d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1593d9ae7f2bSJakub Kicinski { 1594d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1595d9ae7f2bSJakub Kicinski } 1596d9ae7f2bSJakub Kicinski 1597d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1598d9ae7f2bSJakub Kicinski { 1599d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1600d9ae7f2bSJakub Kicinski } 1601d9ae7f2bSJakub Kicinski 1602d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1603d9ae7f2bSJakub Kicinski { 1604d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1605d9ae7f2bSJakub Kicinski } 1606d9ae7f2bSJakub Kicinski 1607d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1608d9ae7f2bSJakub Kicinski { 1609d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1610d9ae7f2bSJakub Kicinski } 1611d9ae7f2bSJakub Kicinski 1612d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1613d9ae7f2bSJakub Kicinski { 1614d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1615d9ae7f2bSJakub Kicinski } 1616d9ae7f2bSJakub Kicinski 1617d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1618d9ae7f2bSJakub Kicinski { 1619d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1620d9ae7f2bSJakub Kicinski } 1621d9ae7f2bSJakub Kicinski 1622d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1623d9ae7f2bSJakub Kicinski { 1624d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1625d9ae7f2bSJakub Kicinski } 1626d9ae7f2bSJakub Kicinski 1627d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1628d9ae7f2bSJakub Kicinski { 1629d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1630d9ae7f2bSJakub Kicinski } 1631d9ae7f2bSJakub Kicinski 1632d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1633d9ae7f2bSJakub Kicinski { 1634d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1635d9ae7f2bSJakub Kicinski } 1636d9ae7f2bSJakub Kicinski 1637254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1638254ef4d7SJiong Wang { 1639254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1640254ef4d7SJiong Wang 1641254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1642254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1643254ef4d7SJiong Wang 1644254ef4d7SJiong Wang return 0; 1645254ef4d7SJiong Wang } 1646254ef4d7SJiong Wang 1647d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1648d9ae7f2bSJakub Kicinski { 1649d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1650d9ae7f2bSJakub Kicinski 1651d9ae7f2bSJakub Kicinski if (!insn->imm) 1652d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1653d9ae7f2bSJakub Kicinski 1654d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1655d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1656d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1657d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1658d9ae7f2bSJakub Kicinski 1659d9ae7f2bSJakub Kicinski return 0; 1660d9ae7f2bSJakub Kicinski } 1661d9ae7f2bSJakub Kicinski 16623119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16633119d1fdSJakub Kicinski { 16643119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 16653119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 16663119d1fdSJakub Kicinski 16673119d1fdSJakub Kicinski switch (insn->imm) { 16683119d1fdSJakub Kicinski case 16: 16693119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 16703119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 16713119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 16723119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 16733119d1fdSJakub Kicinski 16743119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16753119d1fdSJakub Kicinski break; 16763119d1fdSJakub Kicinski case 32: 16773119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 16783119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 16793119d1fdSJakub Kicinski break; 16803119d1fdSJakub Kicinski case 64: 16813119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 16823119d1fdSJakub Kicinski 16833119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 16843119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 16853119d1fdSJakub Kicinski break; 16863119d1fdSJakub Kicinski } 16873119d1fdSJakub Kicinski 16883119d1fdSJakub Kicinski return 0; 16893119d1fdSJakub Kicinski } 16903119d1fdSJakub Kicinski 1691d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1692d9ae7f2bSJakub Kicinski { 16939f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 16949f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 16959f16c8abSJakub Kicinski u8 dst; 16969f16c8abSJakub Kicinski 16979f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 16989f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 16999f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 17009f16c8abSJakub Kicinski 17019f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 17029f16c8abSJakub Kicinski 17039f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 17049f16c8abSJakub Kicinski if (imm_hi == imm_lo) 17059f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 17069f16c8abSJakub Kicinski else 17079f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 1708d9ae7f2bSJakub Kicinski 1709d9ae7f2bSJakub Kicinski return 0; 1710d9ae7f2bSJakub Kicinski } 1711d9ae7f2bSJakub Kicinski 1712d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1713d9ae7f2bSJakub Kicinski { 1714d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1715d9ae7f2bSJakub Kicinski return 0; 1716d9ae7f2bSJakub Kicinski } 1717d9ae7f2bSJakub Kicinski 1718d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1719d9ae7f2bSJakub Kicinski { 1720d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1721d9ae7f2bSJakub Kicinski } 1722d9ae7f2bSJakub Kicinski 1723d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1724d9ae7f2bSJakub Kicinski { 1725d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1726d9ae7f2bSJakub Kicinski } 1727d9ae7f2bSJakub Kicinski 1728d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1729d9ae7f2bSJakub Kicinski { 1730d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1731d9ae7f2bSJakub Kicinski } 1732d9ae7f2bSJakub Kicinski 1733d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1734d9ae7f2bSJakub Kicinski { 1735d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17360a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 1737d9ae7f2bSJakub Kicinski } 1738d9ae7f2bSJakub Kicinski 1739d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1740d9ae7f2bSJakub Kicinski { 1741d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17420a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 1743d9ae7f2bSJakub Kicinski } 1744d9ae7f2bSJakub Kicinski 1745d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1746d9ae7f2bSJakub Kicinski { 1747d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 17480a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 1749d9ae7f2bSJakub Kicinski } 1750d9ae7f2bSJakub Kicinski 1751a82b23fbSJakub Kicinski static int 1752a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1753d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1754a82b23fbSJakub Kicinski { 1755d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1756b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 1757b14157eeSJakub Kicinski true, wrp_lmem_load); 1758a82b23fbSJakub Kicinski } 1759a82b23fbSJakub Kicinski 1760943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1761943c57b9SJakub Kicinski u8 size) 1762d9ae7f2bSJakub Kicinski { 1763bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1764bfddbc8aSJakub Kicinski 1765943c57b9SJakub Kicinski switch (meta->insn.off) { 1766c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 1767c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 1768943c57b9SJakub Kicinski return -EOPNOTSUPP; 1769bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 1770bfddbc8aSJakub Kicinski break; 1771c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 1772c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 1773bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1774bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1775bfddbc8aSJakub Kicinski break; 1776c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 1777c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 1778bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1779bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 1780bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1781943c57b9SJakub Kicinski break; 1782943c57b9SJakub Kicinski default: 1783d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1784943c57b9SJakub Kicinski } 1785943c57b9SJakub Kicinski 1786943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1787d9ae7f2bSJakub Kicinski 1788d9ae7f2bSJakub Kicinski return 0; 1789d9ae7f2bSJakub Kicinski } 1790d9ae7f2bSJakub Kicinski 1791943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1792943c57b9SJakub Kicinski u8 size) 1793d9ae7f2bSJakub Kicinski { 1794b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1795d9ae7f2bSJakub Kicinski 1796943c57b9SJakub Kicinski switch (meta->insn.off) { 1797c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 1798c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 1799c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1800c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1801943c57b9SJakub Kicinski break; 1802c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 1803c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 1804c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1805943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 1806943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1807943c57b9SJakub Kicinski break; 1808943c57b9SJakub Kicinski default: 1809943c57b9SJakub Kicinski return -EOPNOTSUPP; 1810943c57b9SJakub Kicinski } 1811d9ae7f2bSJakub Kicinski 1812943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1813d9ae7f2bSJakub Kicinski 1814d9ae7f2bSJakub Kicinski return 0; 1815d9ae7f2bSJakub Kicinski } 1816d9ae7f2bSJakub Kicinski 18172ca71441SJakub Kicinski static int 18182ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18192ca71441SJakub Kicinski unsigned int size) 18202ca71441SJakub Kicinski { 18212ca71441SJakub Kicinski swreg tmp_reg; 18222ca71441SJakub Kicinski 18232ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18242ca71441SJakub Kicinski 18253dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 18263dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18273dd43c33SJakub Kicinski } 18283dd43c33SJakub Kicinski 18293dd43c33SJakub Kicinski static int 18303dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 18313dd43c33SJakub Kicinski unsigned int size) 18323dd43c33SJakub Kicinski { 18333dd43c33SJakub Kicinski swreg tmp_reg; 18343dd43c33SJakub Kicinski 18353dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 18363dd43c33SJakub Kicinski 18373dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 18383dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 18392ca71441SJakub Kicinski } 18402ca71441SJakub Kicinski 1841be759237SJiong Wang static void 1842be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 1843be759237SJiong Wang struct nfp_insn_meta *meta) 1844be759237SJiong Wang { 1845be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 1846be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 1847be759237SJiong Wang swreg src_base, off; 1848be759237SJiong Wang u8 xfer_num, len; 1849be759237SJiong Wang bool indir; 1850be759237SJiong Wang 1851be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 1852be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 1853be759237SJiong Wang len = range_end - range_start; 1854be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 1855be759237SJiong Wang 1856be759237SJiong Wang indir = len > 8 * REG_WIDTH; 1857be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 1858be759237SJiong Wang if (indir) 1859be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 1860be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 1861be759237SJiong Wang 1862be759237SJiong Wang /* Cache memory into transfer-in registers. */ 1863be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 1864be759237SJiong Wang off, xfer_num - 1, true, indir); 1865be759237SJiong Wang } 1866be759237SJiong Wang 1867be759237SJiong Wang static int 1868be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 1869be759237SJiong Wang struct nfp_insn_meta *meta, 1870be759237SJiong Wang unsigned int size) 1871be759237SJiong Wang { 1872be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 1873be759237SJiong Wang u8 dst_gpr, idx; 1874be759237SJiong Wang 1875be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 1876be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 1877be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 1878be759237SJiong Wang dst_lo = reg_both(dst_gpr); 1879be759237SJiong Wang src_lo = reg_xfer(idx); 1880be759237SJiong Wang 1881be759237SJiong Wang if (size < REG_WIDTH) { 1882be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 1883be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1884be759237SJiong Wang } else if (size == REG_WIDTH) { 1885be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1886be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1887be759237SJiong Wang } else { 1888be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 1889be759237SJiong Wang 1890be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 1891be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 1892be759237SJiong Wang } 1893be759237SJiong Wang 1894be759237SJiong Wang return 0; 1895be759237SJiong Wang } 1896be759237SJiong Wang 1897be759237SJiong Wang static int 1898be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 1899be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 1900be759237SJiong Wang { 1901be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 1902be759237SJiong Wang 1903be759237SJiong Wang if (WARN_ON_ONCE(!IS_ALIGNED(off, REG_WIDTH))) 1904be759237SJiong Wang return -EOPNOTSUPP; 1905be759237SJiong Wang 1906be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 1907be759237SJiong Wang } 1908be759237SJiong Wang 19092ca71441SJakub Kicinski static int 19102ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 19112ca71441SJakub Kicinski unsigned int size) 19122ca71441SJakub Kicinski { 19139879a381SJiong Wang if (meta->ldst_gather_len) 19149879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 19159879a381SJiong Wang 19162ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 1917012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 19182ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 19192ca71441SJakub Kicinski else 19202ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 19212ca71441SJakub Kicinski } 19222ca71441SJakub Kicinski 1923be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 1924be759237SJiong Wang if (meta->pkt_cache.range_end) { 1925be759237SJiong Wang if (meta->pkt_cache.do_init) 1926be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 1927be759237SJiong Wang 1928be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 1929be759237SJiong Wang } else { 19302ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 1931be759237SJiong Wang } 1932be759237SJiong Wang } 19332ca71441SJakub Kicinski 1934a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 1935d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 1936d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 1937a82b23fbSJakub Kicinski 19383dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 19393dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 19403dd43c33SJakub Kicinski 19412ca71441SJakub Kicinski return -EOPNOTSUPP; 19422ca71441SJakub Kicinski } 19432ca71441SJakub Kicinski 19442ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19452ca71441SJakub Kicinski { 19462ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 19472ca71441SJakub Kicinski } 19482ca71441SJakub Kicinski 19492ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19502ca71441SJakub Kicinski { 19512ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 19522ca71441SJakub Kicinski } 19532ca71441SJakub Kicinski 1954d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1955d9ae7f2bSJakub Kicinski { 19562ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 19572ca71441SJakub Kicinski } 19582ca71441SJakub Kicinski 19592ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19602ca71441SJakub Kicinski { 19612ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 1962d9ae7f2bSJakub Kicinski } 1963d9ae7f2bSJakub Kicinski 1964e663fe38SJakub Kicinski static int 1965e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1966e663fe38SJakub Kicinski unsigned int size) 1967d9ae7f2bSJakub Kicinski { 1968e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1969e663fe38SJakub Kicinski swreg off_reg; 1970e663fe38SJakub Kicinski 1971e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 1972e663fe38SJakub Kicinski 1973e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 1974e663fe38SJakub Kicinski imm, size); 1975e663fe38SJakub Kicinski } 1976e663fe38SJakub Kicinski 1977e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1978e663fe38SJakub Kicinski unsigned int size) 1979e663fe38SJakub Kicinski { 1980e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 1981e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 1982e663fe38SJakub Kicinski 1983d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1984d9ae7f2bSJakub Kicinski } 1985d9ae7f2bSJakub Kicinski 1986e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1987d9ae7f2bSJakub Kicinski { 1988e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 1989e663fe38SJakub Kicinski } 1990e663fe38SJakub Kicinski 1991e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1992e663fe38SJakub Kicinski { 1993e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 1994e663fe38SJakub Kicinski } 1995e663fe38SJakub Kicinski 1996e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1997e663fe38SJakub Kicinski { 1998e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 1999e663fe38SJakub Kicinski } 2000e663fe38SJakub Kicinski 2001e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2002e663fe38SJakub Kicinski { 2003e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2004e663fe38SJakub Kicinski } 2005e663fe38SJakub Kicinski 2006e663fe38SJakub Kicinski static int 2007e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2008e663fe38SJakub Kicinski unsigned int size) 2009e663fe38SJakub Kicinski { 2010e663fe38SJakub Kicinski swreg off_reg; 2011e663fe38SJakub Kicinski 2012e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2013e663fe38SJakub Kicinski 2014e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2015e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2016e663fe38SJakub Kicinski } 2017e663fe38SJakub Kicinski 2018e663fe38SJakub Kicinski static int 2019ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2020d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2021ee9133a8SJakub Kicinski { 2022d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2023b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2024b14157eeSJakub Kicinski false, wrp_lmem_store); 2025ee9133a8SJakub Kicinski } 2026ee9133a8SJakub Kicinski 2027ee9133a8SJakub Kicinski static int 2028e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2029e663fe38SJakub Kicinski unsigned int size) 2030e663fe38SJakub Kicinski { 2031e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2032e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2033e663fe38SJakub Kicinski 2034ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2035d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2036d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2037ee9133a8SJakub Kicinski 2038d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2039d9ae7f2bSJakub Kicinski } 2040d9ae7f2bSJakub Kicinski 2041e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2042e663fe38SJakub Kicinski { 2043e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2044e663fe38SJakub Kicinski } 2045e663fe38SJakub Kicinski 2046e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2047e663fe38SJakub Kicinski { 2048e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2049e663fe38SJakub Kicinski } 2050e663fe38SJakub Kicinski 2051d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2052d9ae7f2bSJakub Kicinski { 2053e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2054e663fe38SJakub Kicinski } 20552ca71441SJakub Kicinski 2056e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2057e663fe38SJakub Kicinski { 2058e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2059d9ae7f2bSJakub Kicinski } 2060d9ae7f2bSJakub Kicinski 2061d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2062d9ae7f2bSJakub Kicinski { 2063d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2064d9ae7f2bSJakub Kicinski 2065d9ae7f2bSJakub Kicinski return 0; 2066d9ae7f2bSJakub Kicinski } 2067d9ae7f2bSJakub Kicinski 2068d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2069d9ae7f2bSJakub Kicinski { 2070d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2071d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2072b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2073b3f868dfSJakub Kicinski 2074b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2075b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2076d9ae7f2bSJakub Kicinski 2077d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2078d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2079d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2080d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2081d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2082d9ae7f2bSJakub Kicinski } 2083d9ae7f2bSJakub Kicinski 2084d9ae7f2bSJakub Kicinski if (imm >> 32) { 2085d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2086d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2087d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2088d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2089d9ae7f2bSJakub Kicinski } 2090d9ae7f2bSJakub Kicinski 2091d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2092d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2093d9ae7f2bSJakub Kicinski 2094d9ae7f2bSJakub Kicinski return 0; 2095d9ae7f2bSJakub Kicinski } 2096d9ae7f2bSJakub Kicinski 2097d9ae7f2bSJakub Kicinski static int jgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2098d9ae7f2bSJakub Kicinski { 209926fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, true); 2100d9ae7f2bSJakub Kicinski } 2101d9ae7f2bSJakub Kicinski 2102d9ae7f2bSJakub Kicinski static int jge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2103d9ae7f2bSJakub Kicinski { 210426fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, false); 2105d9ae7f2bSJakub Kicinski } 2106d9ae7f2bSJakub Kicinski 21075dd294d4SDaniel Borkmann static int jlt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21085dd294d4SDaniel Borkmann { 210926fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BLO, false); 21105dd294d4SDaniel Borkmann } 21115dd294d4SDaniel Borkmann 21125dd294d4SDaniel Borkmann static int jle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21135dd294d4SDaniel Borkmann { 211426fa818dSJakub Kicinski return wrp_cmp_imm(nfp_prog, meta, BR_BHS, true); 21155dd294d4SDaniel Borkmann } 21165dd294d4SDaniel Borkmann 2117c087aa8bSNic Viljoen static int jsgt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2118c087aa8bSNic Viljoen { 2119c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, true); 2120c087aa8bSNic Viljoen } 2121c087aa8bSNic Viljoen 2122c087aa8bSNic Viljoen static int jsge_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2123c087aa8bSNic Viljoen { 2124c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, false); 2125c087aa8bSNic Viljoen } 2126c087aa8bSNic Viljoen 2127c087aa8bSNic Viljoen static int jslt_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2128c087aa8bSNic Viljoen { 2129c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BLT, false); 2130c087aa8bSNic Viljoen } 2131c087aa8bSNic Viljoen 2132c087aa8bSNic Viljoen static int jsle_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2133c087aa8bSNic Viljoen { 2134c087aa8bSNic Viljoen return wrp_cmp_imm(nfp_prog, meta, BR_BGE, true); 2135c087aa8bSNic Viljoen } 2136c087aa8bSNic Viljoen 2137d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2138d9ae7f2bSJakub Kicinski { 2139d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2140d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2141b3f868dfSJakub Kicinski swreg tmp_reg; 2142d9ae7f2bSJakub Kicinski 2143d9ae7f2bSJakub Kicinski if (!imm) { 2144d9ae7f2bSJakub Kicinski meta->skip = true; 2145d9ae7f2bSJakub Kicinski return 0; 2146d9ae7f2bSJakub Kicinski } 2147d9ae7f2bSJakub Kicinski 2148d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2149d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2150d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2151d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2152d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2153d9ae7f2bSJakub Kicinski } 2154d9ae7f2bSJakub Kicinski 2155d9ae7f2bSJakub Kicinski if (imm >> 32) { 2156d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2157d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2158d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2159d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2160d9ae7f2bSJakub Kicinski } 2161d9ae7f2bSJakub Kicinski 2162d9ae7f2bSJakub Kicinski return 0; 2163d9ae7f2bSJakub Kicinski } 2164d9ae7f2bSJakub Kicinski 2165d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2166d9ae7f2bSJakub Kicinski { 2167d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2168d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2169b3f868dfSJakub Kicinski swreg tmp_reg; 2170d9ae7f2bSJakub Kicinski 2171d9ae7f2bSJakub Kicinski if (!imm) { 2172d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2173d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2174d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 217582837370SJakub Kicinski return 0; 2176d9ae7f2bSJakub Kicinski } 2177d9ae7f2bSJakub Kicinski 2178d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2179d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2180d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2181d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2182d9ae7f2bSJakub Kicinski 2183d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2184d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2185d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2186d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2187d9ae7f2bSJakub Kicinski 2188d9ae7f2bSJakub Kicinski return 0; 2189d9ae7f2bSJakub Kicinski } 2190d9ae7f2bSJakub Kicinski 2191d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2192d9ae7f2bSJakub Kicinski { 2193d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2194d9ae7f2bSJakub Kicinski 2195d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2196d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2197d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2198d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2199d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2200d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2201d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2202d9ae7f2bSJakub Kicinski 2203d9ae7f2bSJakub Kicinski return 0; 2204d9ae7f2bSJakub Kicinski } 2205d9ae7f2bSJakub Kicinski 2206d9ae7f2bSJakub Kicinski static int jgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2207d9ae7f2bSJakub Kicinski { 220826fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, true); 2209d9ae7f2bSJakub Kicinski } 2210d9ae7f2bSJakub Kicinski 2211d9ae7f2bSJakub Kicinski static int jge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2212d9ae7f2bSJakub Kicinski { 221326fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, false); 2214d9ae7f2bSJakub Kicinski } 2215d9ae7f2bSJakub Kicinski 22165dd294d4SDaniel Borkmann static int jlt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22175dd294d4SDaniel Borkmann { 221826fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BLO, false); 22195dd294d4SDaniel Borkmann } 22205dd294d4SDaniel Borkmann 22215dd294d4SDaniel Borkmann static int jle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22225dd294d4SDaniel Borkmann { 222326fa818dSJakub Kicinski return wrp_cmp_reg(nfp_prog, meta, BR_BHS, true); 22245dd294d4SDaniel Borkmann } 22255dd294d4SDaniel Borkmann 2226c087aa8bSNic Viljoen static int jsgt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2227c087aa8bSNic Viljoen { 2228c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, true); 2229c087aa8bSNic Viljoen } 2230c087aa8bSNic Viljoen 2231c087aa8bSNic Viljoen static int jsge_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2232c087aa8bSNic Viljoen { 2233c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, false); 2234c087aa8bSNic Viljoen } 2235c087aa8bSNic Viljoen 2236c087aa8bSNic Viljoen static int jslt_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2237c087aa8bSNic Viljoen { 2238c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BLT, false); 2239c087aa8bSNic Viljoen } 2240c087aa8bSNic Viljoen 2241c087aa8bSNic Viljoen static int jsle_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2242c087aa8bSNic Viljoen { 2243c087aa8bSNic Viljoen return wrp_cmp_reg(nfp_prog, meta, BR_BGE, true); 2244c087aa8bSNic Viljoen } 2245c087aa8bSNic Viljoen 2246d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2247d9ae7f2bSJakub Kicinski { 2248d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2249d9ae7f2bSJakub Kicinski } 2250d9ae7f2bSJakub Kicinski 2251d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2252d9ae7f2bSJakub Kicinski { 2253d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2254d9ae7f2bSJakub Kicinski } 2255d9ae7f2bSJakub Kicinski 22562cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22572cb230bdSJakub Kicinski { 22582cb230bdSJakub Kicinski switch (meta->insn.imm) { 22590d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 22600d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 226177a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 226277a3d311SJakub Kicinski return map_lookup_stack(nfp_prog, meta); 22632cb230bdSJakub Kicinski default: 22642cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 22652cb230bdSJakub Kicinski return -EOPNOTSUPP; 22662cb230bdSJakub Kicinski } 22672cb230bdSJakub Kicinski } 22682cb230bdSJakub Kicinski 2269d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2270d9ae7f2bSJakub Kicinski { 2271e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2272d9ae7f2bSJakub Kicinski 2273d9ae7f2bSJakub Kicinski return 0; 2274d9ae7f2bSJakub Kicinski } 2275d9ae7f2bSJakub Kicinski 2276d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2277d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2278d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2279d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2280d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2281d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2282d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2283d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2284d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2285d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2286d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2287d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2288d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2289254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2290d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2291d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2292d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2293d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2294d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2295d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2296d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2297d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2298d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2299d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2300d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2301d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2302d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2303d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2304254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2305d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 23063119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2307d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2308d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2309d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2310d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2311d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2312d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2313d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 23142ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 23152ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2316d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 23172ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2318e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2319e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2320d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2321e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2322e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2323e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2324e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2325e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2326d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2327d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 2328d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = jgt_imm, 2329d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = jge_imm, 23305dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_K] = jlt_imm, 23315dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_K] = jle_imm, 2332c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_K] = jsgt_imm, 2333c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_K] = jsge_imm, 2334c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_K] = jslt_imm, 2335c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_K] = jsle_imm, 2336d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2337d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2338d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 2339d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = jgt_reg, 2340d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = jge_reg, 23415dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLT | BPF_X] = jlt_reg, 23425dd294d4SDaniel Borkmann [BPF_JMP | BPF_JLE | BPF_X] = jle_reg, 2343c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGT | BPF_X] = jsgt_reg, 2344c087aa8bSNic Viljoen [BPF_JMP | BPF_JSGE | BPF_X] = jsge_reg, 2345c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLT | BPF_X] = jslt_reg, 2346c087aa8bSNic Viljoen [BPF_JMP | BPF_JSLE | BPF_X] = jsle_reg, 2347d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2348d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 23492cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2350d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2351d9ae7f2bSJakub Kicinski }; 2352d9ae7f2bSJakub Kicinski 2353d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2354d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2355d9ae7f2bSJakub Kicinski { 23565b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2357854dc87dSJiong Wang u32 idx, br_idx; 2358d9ae7f2bSJakub Kicinski 2359854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2360d9ae7f2bSJakub Kicinski if (meta->skip) 2361d9ae7f2bSJakub Kicinski continue; 23622cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 23632cb230bdSJakub Kicinski continue; 2364d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2365d9ae7f2bSJakub Kicinski continue; 2366d9ae7f2bSJakub Kicinski 23675b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 23682314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 23695b674140SJiong Wang else 23702314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2371854dc87dSJiong Wang 2372d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2373d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2374d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2375d9ae7f2bSJakub Kicinski return -ELOOP; 2376d9ae7f2bSJakub Kicinski } 2377d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 23782314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 23792314fe9eSJakub Kicinski RELO_BR_REL) 2380d9ae7f2bSJakub Kicinski continue; 2381d9ae7f2bSJakub Kicinski 23825b674140SJiong Wang if (!meta->jmp_dst) { 23835b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2384d9ae7f2bSJakub Kicinski return -ELOOP; 2385d9ae7f2bSJakub Kicinski } 2386d9ae7f2bSJakub Kicinski 23875b674140SJiong Wang jmp_dst = meta->jmp_dst; 2388854dc87dSJiong Wang 23895b674140SJiong Wang if (jmp_dst->skip) { 2390d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2391d9ae7f2bSJakub Kicinski return -ELOOP; 2392d9ae7f2bSJakub Kicinski } 2393d9ae7f2bSJakub Kicinski 23942314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2395d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2396d9ae7f2bSJakub Kicinski continue; 23975b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2398d9ae7f2bSJakub Kicinski } 2399d9ae7f2bSJakub Kicinski } 2400d9ae7f2bSJakub Kicinski 2401d9ae7f2bSJakub Kicinski return 0; 2402d9ae7f2bSJakub Kicinski } 2403d9ae7f2bSJakub Kicinski 2404d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2405d9ae7f2bSJakub Kicinski { 240618e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 240718e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 240818e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2409d9ae7f2bSJakub Kicinski } 2410d9ae7f2bSJakub Kicinski 2411d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2412d9ae7f2bSJakub Kicinski { 2413d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2414d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2415d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2416d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2417d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2418d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2419d9ae7f2bSJakub Kicinski * 2420d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2421d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2422d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2423d9ae7f2bSJakub Kicinski * packets up the stack. 2424d9ae7f2bSJakub Kicinski */ 2425d9ae7f2bSJakub Kicinski /* Target for aborts */ 2426d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2427d9ae7f2bSJakub Kicinski 2428e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2429d9ae7f2bSJakub Kicinski 2430c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2431d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2432d9ae7f2bSJakub Kicinski 2433d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2434d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2435d9ae7f2bSJakub Kicinski 2436d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2437d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2438d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2439c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2440d9ae7f2bSJakub Kicinski 2441d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2442d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2443d9ae7f2bSJakub Kicinski 2444d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2445d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2446d9ae7f2bSJakub Kicinski 2447d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2448d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2449d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2450d9ae7f2bSJakub Kicinski 2451d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2452d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2453d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2454d9ae7f2bSJakub Kicinski 2455e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2456d9ae7f2bSJakub Kicinski 2457d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2458d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2459d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2460d9ae7f2bSJakub Kicinski } 2461d9ae7f2bSJakub Kicinski 2462d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2463d9ae7f2bSJakub Kicinski { 2464d9ae7f2bSJakub Kicinski /* XDP return codes: 2465d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2466d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2467d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2468d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2469d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2470d9ae7f2bSJakub Kicinski */ 2471d9ae7f2bSJakub Kicinski /* Target for aborts */ 2472d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2473d9ae7f2bSJakub Kicinski 2474e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2475d9ae7f2bSJakub Kicinski 2476c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2477d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2478d9ae7f2bSJakub Kicinski 2479d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2480d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2481d9ae7f2bSJakub Kicinski 2482d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2483d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2484d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2485d9ae7f2bSJakub Kicinski 2486d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2487d9ae7f2bSJakub Kicinski 2488d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2489d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2490d9ae7f2bSJakub Kicinski 2491d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2492d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2493d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 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_b(2), SHF_SC_L_SHF, 16); 2499d9ae7f2bSJakub Kicinski } 2500d9ae7f2bSJakub Kicinski 2501d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2502d9ae7f2bSJakub Kicinski { 2503012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2504012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2505d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2506d9ae7f2bSJakub Kicinski break; 2507012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2508d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2509d9ae7f2bSJakub Kicinski break; 2510012bb8a8SJakub Kicinski default: 2511012bb8a8SJakub Kicinski WARN_ON(1); 2512d9ae7f2bSJakub Kicinski } 2513d9ae7f2bSJakub Kicinski } 2514d9ae7f2bSJakub Kicinski 2515d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2516d9ae7f2bSJakub Kicinski { 2517d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2518ff42bb9fSJakub Kicinski int err; 2519d9ae7f2bSJakub Kicinski 2520d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2521d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2522d9ae7f2bSJakub Kicinski return nfp_prog->error; 2523d9ae7f2bSJakub Kicinski 2524d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2525d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2526d9ae7f2bSJakub Kicinski 2527d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2528d9ae7f2bSJakub Kicinski 2529d9ae7f2bSJakub Kicinski if (meta->skip) { 2530d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2531d9ae7f2bSJakub Kicinski continue; 2532d9ae7f2bSJakub Kicinski } 2533d9ae7f2bSJakub Kicinski 2534d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2535d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2536d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2537d9ae7f2bSJakub Kicinski if (!cb) 2538d9ae7f2bSJakub Kicinski return -ENOENT; 2539d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2540d9ae7f2bSJakub Kicinski if (err) 2541d9ae7f2bSJakub Kicinski return err; 2542d9ae7f2bSJakub Kicinski 2543d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2544d9ae7f2bSJakub Kicinski } 2545d9ae7f2bSJakub Kicinski 2546854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 2547854dc87dSJiong Wang 2548d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 2549d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2550d9ae7f2bSJakub Kicinski return nfp_prog->error; 2551d9ae7f2bSJakub Kicinski 2552ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 25531c03e03fSJakub Kicinski if (nfp_prog->error) 25541c03e03fSJakub Kicinski return nfp_prog->error; 25551c03e03fSJakub Kicinski 2556d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 2557d9ae7f2bSJakub Kicinski } 2558d9ae7f2bSJakub Kicinski 2559d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 2560d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 2561d9ae7f2bSJakub Kicinski { 2562d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2563d9ae7f2bSJakub Kicinski 2564d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2565d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 2566d9ae7f2bSJakub Kicinski 2567d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 2568d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 2569d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 2570d9ae7f2bSJakub Kicinski continue; 2571d9ae7f2bSJakub Kicinski 2572d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 2573d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 2574d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 2575d9ae7f2bSJakub Kicinski meta->skip = true; 2576d9ae7f2bSJakub Kicinski 2577d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 2578d9ae7f2bSJakub Kicinski if (!meta->skip) 2579d9ae7f2bSJakub Kicinski return; 2580d9ae7f2bSJakub Kicinski } 2581d9ae7f2bSJakub Kicinski } 2582d9ae7f2bSJakub Kicinski 2583d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 2584d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 2585d9ae7f2bSJakub Kicinski { 2586d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 2587d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 2588d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 2589d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 2590d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 2591d9ae7f2bSJakub Kicinski }; 2592d9ae7f2bSJakub Kicinski 2593d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 2594d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 2595d9ae7f2bSJakub Kicinski 2596d9ae7f2bSJakub Kicinski insn = meta1->insn; 2597d9ae7f2bSJakub Kicinski next = meta2->insn; 2598d9ae7f2bSJakub Kicinski 2599d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2600d9ae7f2bSJakub Kicinski continue; 2601d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2602d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2603d9ae7f2bSJakub Kicinski continue; 2604d9ae7f2bSJakub Kicinski 2605d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 2606d9ae7f2bSJakub Kicinski continue; 2607d9ae7f2bSJakub Kicinski 2608d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 2609d9ae7f2bSJakub Kicinski continue; 2610d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 2611d9ae7f2bSJakub Kicinski continue; 2612d9ae7f2bSJakub Kicinski 2613d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 2614d9ae7f2bSJakub Kicinski continue; 2615d9ae7f2bSJakub Kicinski 26161266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 26171266f5d6SJiong Wang continue; 26181266f5d6SJiong Wang 2619d9ae7f2bSJakub Kicinski meta2->skip = true; 2620d9ae7f2bSJakub Kicinski } 2621d9ae7f2bSJakub Kicinski } 2622d9ae7f2bSJakub Kicinski 2623d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 2624d9ae7f2bSJakub Kicinski { 2625d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 2626d9ae7f2bSJakub Kicinski 2627d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 2628d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 2629d9ae7f2bSJakub Kicinski 2630d9ae7f2bSJakub Kicinski insn = meta1->insn; 2631d9ae7f2bSJakub Kicinski next1 = meta2->insn; 2632d9ae7f2bSJakub Kicinski next2 = meta3->insn; 2633d9ae7f2bSJakub Kicinski 2634d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2635d9ae7f2bSJakub Kicinski continue; 2636d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2637d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2638d9ae7f2bSJakub Kicinski continue; 2639d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 2640d9ae7f2bSJakub Kicinski continue; 2641d9ae7f2bSJakub Kicinski 2642d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 2643d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 2644d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 2645d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 2646d9ae7f2bSJakub Kicinski continue; 2647d9ae7f2bSJakub Kicinski 2648d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 2649d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 2650d9ae7f2bSJakub Kicinski continue; 2651d9ae7f2bSJakub Kicinski 2652d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 2653d9ae7f2bSJakub Kicinski continue; 2654d9ae7f2bSJakub Kicinski 265529fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 265629fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 265729fe46efSJiong Wang continue; 265829fe46efSJiong Wang 2659d9ae7f2bSJakub Kicinski meta2->skip = true; 2660d9ae7f2bSJakub Kicinski meta3->skip = true; 2661d9ae7f2bSJakub Kicinski } 2662d9ae7f2bSJakub Kicinski } 2663d9ae7f2bSJakub Kicinski 26646bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 26656bc7103cSJiong Wang * 26666bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 26676bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 26686bc7103cSJiong Wang * 26696bc7103cSJiong Wang * The destination register of load and source register of store should 26706bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 26716bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 26726bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 26736bc7103cSJiong Wang */ 26746bc7103cSJiong Wang static bool 26756bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 26766bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 26776bc7103cSJiong Wang { 26786bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 26796bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 26806bc7103cSJiong Wang 26816bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 26826bc7103cSJiong Wang return false; 26836bc7103cSJiong Wang 26846bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 26856bc7103cSJiong Wang return false; 26866bc7103cSJiong Wang 26876bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 26886bc7103cSJiong Wang return false; 26896bc7103cSJiong Wang 26906bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 26916bc7103cSJiong Wang return false; 26926bc7103cSJiong Wang 26936bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 26946bc7103cSJiong Wang return false; 26956bc7103cSJiong Wang 26966bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 26976bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 26986bc7103cSJiong Wang return false; 26996bc7103cSJiong Wang 27006bc7103cSJiong Wang return true; 27016bc7103cSJiong Wang } 27026bc7103cSJiong Wang 27036bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 27046bc7103cSJiong Wang * 27056bc7103cSJiong Wang * - Their address base registers are the same. 27066bc7103cSJiong Wang * - Their address offsets are in the same order. 27076bc7103cSJiong Wang * - They operate at the same memory width. 27086bc7103cSJiong Wang * - There is no jump into the middle of them. 27096bc7103cSJiong Wang */ 27106bc7103cSJiong Wang static bool 27116bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 27126bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 27136bc7103cSJiong Wang struct bpf_insn *prev_ld, 27146bc7103cSJiong Wang struct bpf_insn *prev_st) 27156bc7103cSJiong Wang { 27166bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 27176bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 27186bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 27196bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 27206bc7103cSJiong Wang 27216bc7103cSJiong Wang /* This pair is the start pair. */ 27226bc7103cSJiong Wang if (!prev_ld) 27236bc7103cSJiong Wang return true; 27246bc7103cSJiong Wang 27256bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 27266bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 27276bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 27286bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 27296bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 27306bc7103cSJiong Wang prev_ld_off = prev_ld->off; 27316bc7103cSJiong Wang prev_st_off = prev_st->off; 27326bc7103cSJiong Wang 27336bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 27346bc7103cSJiong Wang return false; 27356bc7103cSJiong Wang 27366bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 27376bc7103cSJiong Wang return false; 27386bc7103cSJiong Wang 27396bc7103cSJiong Wang if (curr_size != prev_size) 27406bc7103cSJiong Wang return false; 27416bc7103cSJiong Wang 27426bc7103cSJiong Wang /* There is jump to the head of this pair. */ 27436bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 27446bc7103cSJiong Wang return false; 27456bc7103cSJiong Wang 27466bc7103cSJiong Wang /* Both in ascending order. */ 27476bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 27486bc7103cSJiong Wang prev_st_off + prev_size == st->off) 27496bc7103cSJiong Wang return true; 27506bc7103cSJiong Wang 27516bc7103cSJiong Wang /* Both in descending order. */ 27526bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 27536bc7103cSJiong Wang st->off + curr_size == prev_st_off) 27546bc7103cSJiong Wang return true; 27556bc7103cSJiong Wang 27566bc7103cSJiong Wang return false; 27576bc7103cSJiong Wang } 27586bc7103cSJiong Wang 27596bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 27606bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 27616bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 27626bc7103cSJiong Wang * as an memory copy. 27636bc7103cSJiong Wang */ 27646bc7103cSJiong Wang static bool 27656bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 27666bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 27676bc7103cSJiong Wang { 27686bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 27696bc7103cSJiong Wang 27706bc7103cSJiong Wang /* Different pointer types does not overlap. */ 27716bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 27726bc7103cSJiong Wang return false; 27736bc7103cSJiong Wang 27746bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 27756bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 27766bc7103cSJiong Wang return true; 27776bc7103cSJiong Wang 27786bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 27796bc7103cSJiong Wang * base register. 27806bc7103cSJiong Wang */ 27816bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 27826bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 27836bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 27846bc7103cSJiong Wang 27856bc7103cSJiong Wang /* Ascending order cross. */ 27866bc7103cSJiong Wang if (ld_off > head_ld_off && 27876bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 27886bc7103cSJiong Wang return true; 27896bc7103cSJiong Wang 27906bc7103cSJiong Wang /* Descending order cross. */ 27916bc7103cSJiong Wang if (ld_off < head_ld_off && 27926bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 27936bc7103cSJiong Wang return true; 27946bc7103cSJiong Wang 27956bc7103cSJiong Wang return false; 27966bc7103cSJiong Wang } 27976bc7103cSJiong Wang 27986bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 27996bc7103cSJiong Wang * 28006bc7103cSJiong Wang * load R, [regA + offA] 28016bc7103cSJiong Wang * store [regB + offB], R 28026bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 28036bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 28046bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 28056bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 28066bc7103cSJiong Wang * ... 28076bc7103cSJiong Wang * 28086bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 28096bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 28106bc7103cSJiong Wang */ 28116bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 28126bc7103cSJiong Wang { 28136bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 28146bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 28156bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 28166bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 28176bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 28186bc7103cSJiong Wang u8 count = 0; 28196bc7103cSJiong Wang 28206bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 28216bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 28226bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 28236bc7103cSJiong Wang 28246bc7103cSJiong Wang /* Reset record status if any of the following if true: 28256bc7103cSJiong Wang * - The current insn pair is not load/store. 28266bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 28276bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 28286bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 28296bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 28306bc7103cSJiong Wang * single NFP CPP command can transfer. 28316bc7103cSJiong Wang */ 28326bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 28336bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 28346bc7103cSJiong Wang prev_st) || 28356bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 28366bc7103cSJiong Wang head_st_meta) || 28376bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 28386bc7103cSJiong Wang if (!count) 28396bc7103cSJiong Wang continue; 28406bc7103cSJiong Wang 28416bc7103cSJiong Wang if (count > 1) { 28426bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 28436bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 28446bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 28456bc7103cSJiong Wang 28466bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 28476bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 28486bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 28496bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 28506bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 28516bc7103cSJiong Wang } 28526bc7103cSJiong Wang 28536bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 28546bc7103cSJiong Wang head_st_meta->skip = true; 28556bc7103cSJiong Wang } else { 28566bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 28576bc7103cSJiong Wang } 28586bc7103cSJiong Wang 28596bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 28606bc7103cSJiong Wang * could serve as the new head of the the next chain. 28616bc7103cSJiong Wang */ 28626bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 28636bc7103cSJiong Wang head_ld_meta = meta1; 28646bc7103cSJiong Wang head_st_meta = meta2; 28656bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 28666bc7103cSJiong Wang BPF_LDST_BYTES(ld); 28676bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 28686bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 28696bc7103cSJiong Wang prev_ld = ld; 28706bc7103cSJiong Wang prev_st = st; 28716bc7103cSJiong Wang count = 1; 28726bc7103cSJiong Wang } else { 28736bc7103cSJiong Wang head_ld_meta = NULL; 28746bc7103cSJiong Wang head_st_meta = NULL; 28756bc7103cSJiong Wang prev_ld = NULL; 28766bc7103cSJiong Wang prev_st = NULL; 28776bc7103cSJiong Wang count = 0; 28786bc7103cSJiong Wang } 28796bc7103cSJiong Wang 28806bc7103cSJiong Wang continue; 28816bc7103cSJiong Wang } 28826bc7103cSJiong Wang 28836bc7103cSJiong Wang if (!head_ld_meta) { 28846bc7103cSJiong Wang head_ld_meta = meta1; 28856bc7103cSJiong Wang head_st_meta = meta2; 28866bc7103cSJiong Wang } else { 28876bc7103cSJiong Wang meta1->skip = true; 28886bc7103cSJiong Wang meta2->skip = true; 28896bc7103cSJiong Wang } 28906bc7103cSJiong Wang 28916bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 28926bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 28936bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 28946bc7103cSJiong Wang prev_ld = ld; 28956bc7103cSJiong Wang prev_st = st; 28966bc7103cSJiong Wang count++; 28976bc7103cSJiong Wang } 28986bc7103cSJiong Wang } 28996bc7103cSJiong Wang 2900d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 2901d9ae7f2bSJakub Kicinski { 2902d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 2903d9ae7f2bSJakub Kicinski 2904d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 2905d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 29066bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 2907d9ae7f2bSJakub Kicinski 2908d9ae7f2bSJakub Kicinski return 0; 2909d9ae7f2bSJakub Kicinski } 2910d9ae7f2bSJakub Kicinski 29112314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 2912fd068ddcSJakub Kicinski { 29132314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 2914fd068ddcSJakub Kicinski int i; 2915fd068ddcSJakub Kicinski 29162314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 2917fd068ddcSJakub Kicinski int err; 2918fd068ddcSJakub Kicinski 29192314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 2920fd068ddcSJakub Kicinski if (err) 2921fd068ddcSJakub Kicinski return err; 2922fd068ddcSJakub Kicinski 29232314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 2924fd068ddcSJakub Kicinski } 2925fd068ddcSJakub Kicinski 2926fd068ddcSJakub Kicinski return 0; 2927fd068ddcSJakub Kicinski } 2928fd068ddcSJakub Kicinski 292944a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 293044a12eccSJakub Kicinski { 293144a12eccSJakub Kicinski void *prog; 293244a12eccSJakub Kicinski 293344a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 293444a12eccSJakub Kicinski if (!prog) 293544a12eccSJakub Kicinski return; 293644a12eccSJakub Kicinski 293744a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 293844a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 293944a12eccSJakub Kicinski kvfree(nfp_prog->prog); 294044a12eccSJakub Kicinski nfp_prog->prog = prog; 294144a12eccSJakub Kicinski } 294244a12eccSJakub Kicinski 2943c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 2944d9ae7f2bSJakub Kicinski { 2945d9ae7f2bSJakub Kicinski int ret; 2946d9ae7f2bSJakub Kicinski 2947d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 2948d9ae7f2bSJakub Kicinski if (ret) 29499314c442SJakub Kicinski return ret; 2950d9ae7f2bSJakub Kicinski 2951d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 2952d9ae7f2bSJakub Kicinski if (ret) { 2953d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 2954d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 29559314c442SJakub Kicinski return -EINVAL; 2956d9ae7f2bSJakub Kicinski } 2957d9ae7f2bSJakub Kicinski 295844a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 295944a12eccSJakub Kicinski 29602314fe9eSJakub Kicinski return ret; 2961d9ae7f2bSJakub Kicinski } 29621549921dSJakub Kicinski 29631549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 29641549921dSJakub Kicinski { 29651549921dSJakub Kicinski struct nfp_insn_meta *meta; 29661549921dSJakub Kicinski 29671549921dSJakub Kicinski /* Another pass to record jump information. */ 29681549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 29691549921dSJakub Kicinski u64 code = meta->insn.code; 29701549921dSJakub Kicinski 29711549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 29721549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 29731549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 29741549921dSJakub Kicinski unsigned short dst_indx; 29751549921dSJakub Kicinski 29761549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 29771549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 29781549921dSJakub Kicinski cnt); 29791549921dSJakub Kicinski 29801549921dSJakub Kicinski meta->jmp_dst = dst_meta; 29811549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 29821549921dSJakub Kicinski } 29831549921dSJakub Kicinski } 29841549921dSJakub Kicinski } 29852314fe9eSJakub Kicinski 298674801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 298774801e50SQuentin Monnet { 298874801e50SQuentin Monnet return !!instr_cb[code]; 298974801e50SQuentin Monnet } 299074801e50SQuentin Monnet 29912314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 29922314fe9eSJakub Kicinski { 29932314fe9eSJakub Kicinski unsigned int i; 29942314fe9eSJakub Kicinski u64 *prog; 29952314fe9eSJakub Kicinski int err; 29962314fe9eSJakub Kicinski 29972314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 29982314fe9eSJakub Kicinski GFP_KERNEL); 29992314fe9eSJakub Kicinski if (!prog) 30002314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 30012314fe9eSJakub Kicinski 30022314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 30032314fe9eSJakub Kicinski enum nfp_relo_type special; 300477a3d311SJakub Kicinski u32 val; 30052314fe9eSJakub Kicinski 30062314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 30072314fe9eSJakub Kicinski switch (special) { 30082314fe9eSJakub Kicinski case RELO_NONE: 30092314fe9eSJakub Kicinski continue; 30102314fe9eSJakub Kicinski case RELO_BR_REL: 30112314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 30122314fe9eSJakub Kicinski break; 30132314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 30142314fe9eSJakub Kicinski br_set_offset(&prog[i], 30152314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 30162314fe9eSJakub Kicinski break; 30172314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 30182314fe9eSJakub Kicinski br_set_offset(&prog[i], 30192314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 30202314fe9eSJakub Kicinski break; 30212314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 30222314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 30232314fe9eSJakub Kicinski break; 302477a3d311SJakub Kicinski case RELO_BR_HELPER: 302577a3d311SJakub Kicinski val = br_get_offset(prog[i]); 302677a3d311SJakub Kicinski val -= BR_OFF_RELO; 302777a3d311SJakub Kicinski switch (val) { 302877a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 302977a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 303077a3d311SJakub Kicinski break; 303177a3d311SJakub Kicinski default: 303277a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 303377a3d311SJakub Kicinski val); 303477a3d311SJakub Kicinski err = -EINVAL; 303577a3d311SJakub Kicinski goto err_free_prog; 303677a3d311SJakub Kicinski } 303777a3d311SJakub Kicinski br_set_offset(&prog[i], val); 303877a3d311SJakub Kicinski break; 303977a3d311SJakub Kicinski case RELO_IMMED_REL: 304077a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 304177a3d311SJakub Kicinski break; 30422314fe9eSJakub Kicinski } 30432314fe9eSJakub Kicinski 30442314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 30452314fe9eSJakub Kicinski } 30462314fe9eSJakub Kicinski 30472314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 30482314fe9eSJakub Kicinski if (err) 30492314fe9eSJakub Kicinski goto err_free_prog; 30502314fe9eSJakub Kicinski 30512314fe9eSJakub Kicinski return prog; 30522314fe9eSJakub Kicinski 30532314fe9eSJakub Kicinski err_free_prog: 30542314fe9eSJakub Kicinski kfree(prog); 30552314fe9eSJakub Kicinski return ERR_PTR(err); 30562314fe9eSJakub Kicinski } 3057