1d9ae7f2bSJakub Kicinski /* 29816dd35SJakub Kicinski * Copyright (C) 2016-2018 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" 45d985888fSJakub Kicinski #include "../nfp_net_ctrl.h" 46d9ae7f2bSJakub Kicinski 47d9ae7f2bSJakub Kicinski /* --- NFP prog --- */ 48d9ae7f2bSJakub Kicinski /* Foreach "multiple" entries macros provide pos and next<n> pointers. 49d9ae7f2bSJakub Kicinski * It's safe to modify the next pointers (but not pos). 50d9ae7f2bSJakub Kicinski */ 51d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk2(nfp_prog, pos, next) \ 52d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 53d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l); \ 54d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 55d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l; \ 56d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 57d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos)) 58d9ae7f2bSJakub Kicinski 59d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk3(nfp_prog, pos, next, next2) \ 60d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 61d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l), \ 62d9ae7f2bSJakub Kicinski next2 = list_next_entry(next, l); \ 63d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 64d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l && \ 65d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next2->l; \ 66d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 67d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos), \ 68d9ae7f2bSJakub Kicinski next2 = nfp_meta_next(next)) 69d9ae7f2bSJakub Kicinski 70d9ae7f2bSJakub Kicinski static bool 71d9ae7f2bSJakub Kicinski nfp_meta_has_prev(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 72d9ae7f2bSJakub Kicinski { 73d9ae7f2bSJakub Kicinski return meta->l.prev != &nfp_prog->insns; 74d9ae7f2bSJakub Kicinski } 75d9ae7f2bSJakub Kicinski 76d9ae7f2bSJakub Kicinski static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn) 77d9ae7f2bSJakub Kicinski { 78e8a4796eSJakub Kicinski if (nfp_prog->__prog_alloc_len / sizeof(u64) == nfp_prog->prog_len) { 79e8a4796eSJakub Kicinski pr_warn("instruction limit reached (%u NFP instructions)\n", 80e8a4796eSJakub Kicinski nfp_prog->prog_len); 81d9ae7f2bSJakub Kicinski nfp_prog->error = -ENOSPC; 82d9ae7f2bSJakub Kicinski return; 83d9ae7f2bSJakub Kicinski } 84d9ae7f2bSJakub Kicinski 85d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len] = insn; 86d9ae7f2bSJakub Kicinski nfp_prog->prog_len++; 87d9ae7f2bSJakub Kicinski } 88d9ae7f2bSJakub Kicinski 89d9ae7f2bSJakub Kicinski static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) 90d9ae7f2bSJakub Kicinski { 912314fe9eSJakub Kicinski return nfp_prog->prog_len; 92d9ae7f2bSJakub Kicinski } 93d9ae7f2bSJakub Kicinski 940d49eaf4SJakub Kicinski static bool 950d49eaf4SJakub Kicinski nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off) 960d49eaf4SJakub Kicinski { 970d49eaf4SJakub Kicinski /* If there is a recorded error we may have dropped instructions; 980d49eaf4SJakub Kicinski * that doesn't have to be due to translator bug, and the translation 990d49eaf4SJakub Kicinski * will fail anyway, so just return OK. 1000d49eaf4SJakub Kicinski */ 1010d49eaf4SJakub Kicinski if (nfp_prog->error) 1020d49eaf4SJakub Kicinski return true; 1030d49eaf4SJakub Kicinski return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off); 1040d49eaf4SJakub Kicinski } 1050d49eaf4SJakub Kicinski 106d9ae7f2bSJakub Kicinski /* --- Emitters --- */ 107d9ae7f2bSJakub Kicinski static void 108d9ae7f2bSJakub Kicinski __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 109b556ddd9SJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, enum cmd_ctx_swap ctx, 110b556ddd9SJakub Kicinski bool indir) 111d9ae7f2bSJakub Kicinski { 112d9ae7f2bSJakub Kicinski u64 insn; 113d9ae7f2bSJakub Kicinski 114d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 115d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 116d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 117d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 118d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 119d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 120b556ddd9SJakub Kicinski FIELD_PREP(OP_CMD_SIG, ctx != CMD_CTX_NO_SWAP) | 121d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 1225468a8b9SJakub Kicinski FIELD_PREP(OP_CMD_INDIR, indir) | 123d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 124d9ae7f2bSJakub Kicinski 125d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 126d9ae7f2bSJakub Kicinski } 127d9ae7f2bSJakub Kicinski 128d9ae7f2bSJakub Kicinski static void 1295468a8b9SJakub Kicinski emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 130b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx, bool indir) 131d9ae7f2bSJakub Kicinski { 132d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 133d9ae7f2bSJakub Kicinski int err; 134d9ae7f2bSJakub Kicinski 135d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 136d9ae7f2bSJakub Kicinski if (err) { 137d9ae7f2bSJakub Kicinski nfp_prog->error = err; 138d9ae7f2bSJakub Kicinski return; 139d9ae7f2bSJakub Kicinski } 140d9ae7f2bSJakub Kicinski if (reg.swap) { 141d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 142d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 143d9ae7f2bSJakub Kicinski return; 144d9ae7f2bSJakub Kicinski } 145995e101fSJakub Kicinski if (reg.dst_lmextn || reg.src_lmextn) { 146995e101fSJakub Kicinski pr_err("cmd can't use LMextn\n"); 147995e101fSJakub Kicinski nfp_prog->error = -EFAULT; 148995e101fSJakub Kicinski return; 149995e101fSJakub Kicinski } 150d9ae7f2bSJakub Kicinski 151b556ddd9SJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, ctx, 1525468a8b9SJakub Kicinski indir); 1535468a8b9SJakub Kicinski } 1545468a8b9SJakub Kicinski 1555468a8b9SJakub Kicinski static void 1565468a8b9SJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 157b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1585468a8b9SJakub Kicinski { 159b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, false); 160d9ae7f2bSJakub Kicinski } 161d9ae7f2bSJakub Kicinski 162d9ae7f2bSJakub Kicinski static void 1639879a381SJiong Wang emit_cmd_indir(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 164b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1659879a381SJiong Wang { 166b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, true); 1679879a381SJiong Wang } 1689879a381SJiong Wang 1699879a381SJiong Wang static void 170d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 171d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 172d9ae7f2bSJakub Kicinski { 173d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 174d9ae7f2bSJakub Kicinski u64 insn; 175d9ae7f2bSJakub Kicinski 176d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 177d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 178d9ae7f2bSJakub Kicinski 179d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 180d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 181d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 182d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 183d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 184d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 185d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 186d9ae7f2bSJakub Kicinski 187d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 188d9ae7f2bSJakub Kicinski } 189d9ae7f2bSJakub Kicinski 1902314fe9eSJakub Kicinski static void 1912314fe9eSJakub Kicinski emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, 1922314fe9eSJakub Kicinski enum nfp_relo_type relo) 193d9ae7f2bSJakub Kicinski { 1942314fe9eSJakub Kicinski if (mask == BR_UNC && defer > 2) { 195d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 196d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 197d9ae7f2bSJakub Kicinski return; 198d9ae7f2bSJakub Kicinski } 1992314fe9eSJakub Kicinski 2002314fe9eSJakub Kicinski __emit_br(nfp_prog, mask, 2012314fe9eSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 2022314fe9eSJakub Kicinski BR_CSS_NONE, addr, defer); 2032314fe9eSJakub Kicinski 2042314fe9eSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 2052314fe9eSJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 206d9ae7f2bSJakub Kicinski } 207d9ae7f2bSJakub Kicinski 208d9ae7f2bSJakub Kicinski static void 209d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 210d9ae7f2bSJakub Kicinski { 2112314fe9eSJakub Kicinski emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); 212d9ae7f2bSJakub Kicinski } 213d9ae7f2bSJakub Kicinski 214d9ae7f2bSJakub Kicinski static void 215d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 216d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 217995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 218995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 219d9ae7f2bSJakub Kicinski { 220d9ae7f2bSJakub Kicinski u64 insn; 221d9ae7f2bSJakub Kicinski 222d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 223d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 224d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 225d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 226d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 227d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 228d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 229995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 230995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 231995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 232d9ae7f2bSJakub Kicinski 233d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 234d9ae7f2bSJakub Kicinski } 235d9ae7f2bSJakub Kicinski 236d9ae7f2bSJakub Kicinski static void 237b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 238d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 239d9ae7f2bSJakub Kicinski { 240d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 241d9ae7f2bSJakub Kicinski int err; 242d9ae7f2bSJakub Kicinski 243b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 244d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 245d9ae7f2bSJakub Kicinski return; 246d9ae7f2bSJakub Kicinski } 247d9ae7f2bSJakub Kicinski 248d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 249d9ae7f2bSJakub Kicinski if (err) { 250d9ae7f2bSJakub Kicinski nfp_prog->error = err; 251d9ae7f2bSJakub Kicinski return; 252d9ae7f2bSJakub Kicinski } 253d9ae7f2bSJakub Kicinski 2543239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 2553239e7bbSJiong Wang __emit_immed(nfp_prog, 2563239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 2573239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 2583239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 259d9ae7f2bSJakub Kicinski } 260d9ae7f2bSJakub Kicinski 261d9ae7f2bSJakub Kicinski static void 262d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 263d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 264995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 265995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 266d9ae7f2bSJakub Kicinski { 267d9ae7f2bSJakub Kicinski u64 insn; 268d9ae7f2bSJakub Kicinski 269d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 270d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 271d9ae7f2bSJakub Kicinski return; 272d9ae7f2bSJakub Kicinski } 273d9ae7f2bSJakub Kicinski 274d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 275d9ae7f2bSJakub Kicinski shift = 32 - shift; 276d9ae7f2bSJakub Kicinski 277d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 278d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 279d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 280d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 281d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 283d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 284d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 285d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 286d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 287995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 288995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 289995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 290d9ae7f2bSJakub Kicinski 291d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 292d9ae7f2bSJakub Kicinski } 293d9ae7f2bSJakub Kicinski 294d9ae7f2bSJakub Kicinski static void 295b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 296b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 297d9ae7f2bSJakub Kicinski { 298d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 299d9ae7f2bSJakub Kicinski int err; 300d9ae7f2bSJakub Kicinski 301d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 302d9ae7f2bSJakub Kicinski if (err) { 303d9ae7f2bSJakub Kicinski nfp_prog->error = err; 304d9ae7f2bSJakub Kicinski return; 305d9ae7f2bSJakub Kicinski } 306d9ae7f2bSJakub Kicinski 307d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 308995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 309995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 310d9ae7f2bSJakub Kicinski } 311d9ae7f2bSJakub Kicinski 312d9ae7f2bSJakub Kicinski static void 313d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 314995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 315995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 316d9ae7f2bSJakub Kicinski { 317d9ae7f2bSJakub Kicinski u64 insn; 318d9ae7f2bSJakub Kicinski 319d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 320d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 321d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 322d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 323d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 324d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 325d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 326995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 327995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 328995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 329d9ae7f2bSJakub Kicinski 330d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 331d9ae7f2bSJakub Kicinski } 332d9ae7f2bSJakub Kicinski 333d9ae7f2bSJakub Kicinski static void 334b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 335b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 336d9ae7f2bSJakub Kicinski { 337d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 338d9ae7f2bSJakub Kicinski int err; 339d9ae7f2bSJakub Kicinski 340d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 341d9ae7f2bSJakub Kicinski if (err) { 342d9ae7f2bSJakub Kicinski nfp_prog->error = err; 343d9ae7f2bSJakub Kicinski return; 344d9ae7f2bSJakub Kicinski } 345d9ae7f2bSJakub Kicinski 346d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 347995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 348995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 349d9ae7f2bSJakub Kicinski } 350d9ae7f2bSJakub Kicinski 351d9ae7f2bSJakub Kicinski static void 352d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 353d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 354995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 355995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 356d9ae7f2bSJakub Kicinski { 357d9ae7f2bSJakub Kicinski u64 insn; 358d9ae7f2bSJakub Kicinski 359d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 360d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 361d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 362d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 363d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 364d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 365d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 366d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 367d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 368995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 369995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 370995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 371d9ae7f2bSJakub Kicinski 372d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 373d9ae7f2bSJakub Kicinski } 374d9ae7f2bSJakub Kicinski 375d9ae7f2bSJakub Kicinski static void 376bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 377bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 378d9ae7f2bSJakub Kicinski { 379d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 380d9ae7f2bSJakub Kicinski int err; 381d9ae7f2bSJakub Kicinski 3822de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 3832de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 384d9ae7f2bSJakub Kicinski if (err) { 385d9ae7f2bSJakub Kicinski nfp_prog->error = err; 386d9ae7f2bSJakub Kicinski return; 387d9ae7f2bSJakub Kicinski } 388d9ae7f2bSJakub Kicinski 389d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 390995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 391995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 392d9ae7f2bSJakub Kicinski } 393d9ae7f2bSJakub Kicinski 394d9ae7f2bSJakub Kicinski static void 395b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 396d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 397d9ae7f2bSJakub Kicinski { 398bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 399d9ae7f2bSJakub Kicinski } 400d9ae7f2bSJakub Kicinski 4012df03a50SJakub Kicinski static void 4022df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 4032df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 4042df03a50SJakub Kicinski { 4052df03a50SJakub Kicinski u64 insn; 4062df03a50SJakub Kicinski 4072df03a50SJakub Kicinski insn = OP_LCSR_BASE | 4082df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 4092df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 4102df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 411df4a37d8SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr / 4) | 4122df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 4132df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 4142df03a50SJakub Kicinski 4152df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 4162df03a50SJakub Kicinski } 4172df03a50SJakub Kicinski 4182df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 4192df03a50SJakub Kicinski { 4202df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 4212df03a50SJakub Kicinski int err; 4222df03a50SJakub Kicinski 4232df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 4242df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 4252df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 4262df03a50SJakub Kicinski * copy the immed to both operands. 4272df03a50SJakub Kicinski */ 4282df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 4292df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 4302df03a50SJakub Kicinski reg.breg = reg.areg; 4312df03a50SJakub Kicinski } else { 4322df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 4332df03a50SJakub Kicinski } 4342df03a50SJakub Kicinski if (err) { 4352df03a50SJakub Kicinski nfp_prog->error = err; 4362df03a50SJakub Kicinski return; 4372df03a50SJakub Kicinski } 4382df03a50SJakub Kicinski 439df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr, 4402df03a50SJakub Kicinski false, reg.src_lmextn); 4412df03a50SJakub Kicinski } 4422df03a50SJakub Kicinski 443df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 444df4a37d8SJakub Kicinski static void __emit_csr_rd(struct nfp_prog *nfp_prog, u16 addr) 445df4a37d8SJakub Kicinski { 446df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, 0, 0, false, addr, false, false); 447df4a37d8SJakub Kicinski } 448df4a37d8SJakub Kicinski 4491c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 4501c03e03fSJakub Kicinski { 4511c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 4521c03e03fSJakub Kicinski } 4531c03e03fSJakub Kicinski 454d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 455d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 456d9ae7f2bSJakub Kicinski { 457d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 458d9ae7f2bSJakub Kicinski *val = imm; 459d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 460d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 461d9ae7f2bSJakub Kicinski *val = imm >> 8; 462d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 463d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 464d9ae7f2bSJakub Kicinski *val = imm >> 16; 465d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 466d9ae7f2bSJakub Kicinski } else { 467d9ae7f2bSJakub Kicinski return false; 468d9ae7f2bSJakub Kicinski } 469d9ae7f2bSJakub Kicinski 470d9ae7f2bSJakub Kicinski return true; 471d9ae7f2bSJakub Kicinski } 472d9ae7f2bSJakub Kicinski 473b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 474d9ae7f2bSJakub Kicinski { 475d9ae7f2bSJakub Kicinski enum immed_shift shift; 476d9ae7f2bSJakub Kicinski u16 val; 477d9ae7f2bSJakub Kicinski 478d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 479d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 480d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 481d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 482d9ae7f2bSJakub Kicinski } else { 483d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 484d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 485d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 486d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 487d9ae7f2bSJakub Kicinski } 488d9ae7f2bSJakub Kicinski } 489d9ae7f2bSJakub Kicinski 49077a3d311SJakub Kicinski static void 49177a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 49277a3d311SJakub Kicinski enum nfp_relo_type relo) 49377a3d311SJakub Kicinski { 49477a3d311SJakub Kicinski if (imm > 0xffff) { 49577a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 49677a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 49777a3d311SJakub Kicinski return; 49877a3d311SJakub Kicinski } 49977a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 50077a3d311SJakub Kicinski 50177a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 50277a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 50377a3d311SJakub Kicinski } 50477a3d311SJakub Kicinski 505d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 506d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 507d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 508d9ae7f2bSJakub Kicinski */ 509b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 510d9ae7f2bSJakub Kicinski { 511d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 512d9ae7f2bSJakub Kicinski return reg_imm(imm); 513d9ae7f2bSJakub Kicinski 514d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 515d9ae7f2bSJakub Kicinski return tmp_reg; 516d9ae7f2bSJakub Kicinski } 517d9ae7f2bSJakub Kicinski 518d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 519d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 520d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 521d9ae7f2bSJakub Kicinski */ 522b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 523d9ae7f2bSJakub Kicinski { 524d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 525d9ae7f2bSJakub Kicinski return reg_imm(imm); 526d9ae7f2bSJakub Kicinski 527d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 528d9ae7f2bSJakub Kicinski return tmp_reg; 529d9ae7f2bSJakub Kicinski } 530d9ae7f2bSJakub Kicinski 531ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 532ff42bb9fSJakub Kicinski { 533ff42bb9fSJakub Kicinski while (count--) 534ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 535ff42bb9fSJakub Kicinski } 536ff42bb9fSJakub Kicinski 537c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 538c000dfb5SJakub Kicinski { 539c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 540c000dfb5SJakub Kicinski } 541c000dfb5SJakub Kicinski 542d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 543d9ae7f2bSJakub Kicinski { 544c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 545d9ae7f2bSJakub Kicinski } 546d9ae7f2bSJakub Kicinski 5479879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 5489879a381SJiong Wang * result to @dst from low end. 5499879a381SJiong Wang */ 5509879a381SJiong Wang static void 5519879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 5529879a381SJiong Wang u8 offset) 5539879a381SJiong Wang { 5549879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 5559879a381SJiong Wang u8 mask = (1 << field_len) - 1; 5569879a381SJiong Wang 5579879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 5589879a381SJiong Wang } 5599879a381SJiong Wang 56091ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 56191ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 56291ff69e8SJiong Wang */ 56391ff69e8SJiong Wang static void 56491ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 56591ff69e8SJiong Wang u8 field_len, u8 offset) 56691ff69e8SJiong Wang { 56791ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 56891ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 56991ff69e8SJiong Wang 57091ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 57191ff69e8SJiong Wang } 57291ff69e8SJiong Wang 5733dd43c33SJakub Kicinski static void 5743dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 5753dd43c33SJakub Kicinski swreg *rega, swreg *regb) 5763dd43c33SJakub Kicinski { 5773dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 5783dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 5793dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 5803dd43c33SJakub Kicinski return; 5813dd43c33SJakub Kicinski } 5823dd43c33SJakub Kicinski 5833dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 5843dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 5853dd43c33SJakub Kicinski reg_imm(0)); 5863dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 5873dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 5883dd43c33SJakub Kicinski } 5893dd43c33SJakub Kicinski 5909879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 5919879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 5929879a381SJiong Wang { 5939879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 5949879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 5959879a381SJiong Wang swreg src_base, off; 5963dd43c33SJakub Kicinski bool src_40bit_addr; 5979879a381SJiong Wang unsigned int i; 5989879a381SJiong Wang u8 xfer_num; 5999879a381SJiong Wang 6009879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 6013dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 6029879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 6039879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 6049879a381SJiong Wang 6053dd43c33SJakub Kicinski if (src_40bit_addr) 6063dd43c33SJakub Kicinski addr40_offset(nfp_prog, meta->insn.src_reg, off, &src_base, 6073dd43c33SJakub Kicinski &off); 6083dd43c33SJakub Kicinski 6098c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 6108c900538SJiong Wang if (len > 32) 6118c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6128c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6138c900538SJiong Wang 6149879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 6153dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 6163dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 617b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 6189879a381SJiong Wang 6199879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 6209879a381SJiong Wang for (i = 0; i < xfer_num; i++) 6219879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 6229879a381SJiong Wang 6239879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 6249879a381SJiong Wang 6259879a381SJiong Wang if (len <= 8) { 6269879a381SJiong Wang /* Use single direct_ref write8. */ 6279879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6289879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 629b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6308c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 6319879a381SJiong Wang /* Use single direct_ref write32. */ 6329879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6339879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 634b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6358c900538SJiong Wang } else if (len <= 32) { 6369879a381SJiong Wang /* Use single indirect_ref write8. */ 6379879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 6389879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 6399879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6409879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 641b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 6428c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 6438c900538SJiong Wang /* Use single indirect_ref write32. */ 6448c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6458c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6468c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6478c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 648b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 6498c900538SJiong Wang } else if (len <= 40) { 6508c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 6518c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 6528c900538SJiong Wang */ 6538c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6548c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 655b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6568c900538SJiong Wang 6578c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 6588c900538SJiong Wang imm_b(nfp_prog)); 6598c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 6608c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 661b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6628c900538SJiong Wang } else { 6638c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 6648c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 6658c900538SJiong Wang */ 6668c900538SJiong Wang u8 new_off; 6678c900538SJiong Wang 6688c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6698c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 6708c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 6718c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 672b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 6738c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 6748c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 6758c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 6768c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 677b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 6789879a381SJiong Wang } 6799879a381SJiong Wang 6809879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 6819879a381SJiong Wang * before and after we do memory copy optimization. 6829879a381SJiong Wang * 6839879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 6849879a381SJiong Wang * need to make sure it is loaded with the value the same as before 6859879a381SJiong Wang * this transformation. 6869879a381SJiong Wang * 6879879a381SJiong Wang * These extra loads could be removed once we have accurate register 6889879a381SJiong Wang * usage information. 6899879a381SJiong Wang */ 6909879a381SJiong Wang if (descending_seq) 6919879a381SJiong Wang xfer_num = 0; 6929879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 6939879a381SJiong Wang xfer_num = xfer_num - 1; 6949879a381SJiong Wang else 6959879a381SJiong Wang xfer_num = xfer_num - 2; 6969879a381SJiong Wang 6979879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 6989879a381SJiong Wang case BPF_B: 6999879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7009879a381SJiong Wang reg_xfer(xfer_num), 1, 7019879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 7029879a381SJiong Wang break; 7039879a381SJiong Wang case BPF_H: 7049879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7059879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 7069879a381SJiong Wang break; 7079879a381SJiong Wang case BPF_W: 7089879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7099879a381SJiong Wang reg_xfer(0)); 7109879a381SJiong Wang break; 7119879a381SJiong Wang case BPF_DW: 7129879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7139879a381SJiong Wang reg_xfer(xfer_num)); 7149879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 7159879a381SJiong Wang reg_xfer(xfer_num + 1)); 7169879a381SJiong Wang break; 7179879a381SJiong Wang } 7189879a381SJiong Wang 7199879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 7209879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 7219879a381SJiong Wang 7229879a381SJiong Wang return 0; 7239879a381SJiong Wang } 7249879a381SJiong Wang 725d9ae7f2bSJakub Kicinski static int 7260a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 727d9ae7f2bSJakub Kicinski { 728d9ae7f2bSJakub Kicinski unsigned int i; 729d9ae7f2bSJakub Kicinski u16 shift, sz; 730d9ae7f2bSJakub Kicinski 731d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 732d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 733d9ae7f2bSJakub Kicinski */ 7340a793977SJakub Kicinski sz = max(size, 4); 735d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 736d9ae7f2bSJakub Kicinski 7370a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 738b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 7390a793977SJakub Kicinski 7400a793977SJakub Kicinski i = 0; 7410a793977SJakub Kicinski if (shift) 7420a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 7430a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 7440a793977SJakub Kicinski else 7450a793977SJakub Kicinski for (; i * 4 < size; i++) 7460a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7470a793977SJakub Kicinski 7480a793977SJakub Kicinski if (i < 2) 7490a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7500a793977SJakub Kicinski 7510a793977SJakub Kicinski return 0; 7520a793977SJakub Kicinski } 7530a793977SJakub Kicinski 7540a793977SJakub Kicinski static int 7553dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 7563dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 7572ca71441SJakub Kicinski { 7582ca71441SJakub Kicinski unsigned int i; 7592ca71441SJakub Kicinski u8 mask, sz; 7602ca71441SJakub Kicinski 7613dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 7622ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 7632ca71441SJakub Kicinski */ 7642ca71441SJakub Kicinski sz = max(size, 4); 7652ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 7662ca71441SJakub Kicinski 7673dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 768b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 7692ca71441SJakub Kicinski 7702ca71441SJakub Kicinski i = 0; 7712ca71441SJakub Kicinski if (mask) 7722ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 7732ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 7742ca71441SJakub Kicinski else 7752ca71441SJakub Kicinski for (; i * 4 < size; i++) 7762ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 7772ca71441SJakub Kicinski 7782ca71441SJakub Kicinski if (i < 2) 7792ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 7802ca71441SJakub Kicinski 7812ca71441SJakub Kicinski return 0; 7822ca71441SJakub Kicinski } 7832ca71441SJakub Kicinski 7842ca71441SJakub Kicinski static int 7853dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7863dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7873dd43c33SJakub Kicinski { 7883dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 7893dd43c33SJakub Kicinski size, CMD_MODE_32b); 7903dd43c33SJakub Kicinski } 7913dd43c33SJakub Kicinski 7923dd43c33SJakub Kicinski static int 7933dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7943dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 7953dd43c33SJakub Kicinski { 7963dd43c33SJakub Kicinski swreg rega, regb; 7973dd43c33SJakub Kicinski 7983dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 7993dd43c33SJakub Kicinski 8003dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 8013dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 8023dd43c33SJakub Kicinski } 8033dd43c33SJakub Kicinski 8043dd43c33SJakub Kicinski static int 8050a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 8060a793977SJakub Kicinski { 8070a793977SJakub Kicinski swreg tmp_reg; 8080a793977SJakub Kicinski 809d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 810d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8110a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 8120a793977SJakub Kicinski 813d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 814d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 815d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 816d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 81718e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 818e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8190a793977SJakub Kicinski 820d9ae7f2bSJakub Kicinski /* Load data */ 8210a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 822d9ae7f2bSJakub Kicinski } 823d9ae7f2bSJakub Kicinski 824d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 825d9ae7f2bSJakub Kicinski { 8260a793977SJakub Kicinski swreg tmp_reg; 8270a793977SJakub Kicinski 8280a793977SJakub Kicinski /* Check packet length */ 8290a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 8300a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 831e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8320a793977SJakub Kicinski 8330a793977SJakub Kicinski /* Load data */ 8340a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8350a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 836d9ae7f2bSJakub Kicinski } 837d9ae7f2bSJakub Kicinski 838e663fe38SJakub Kicinski static int 839e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 840e663fe38SJakub Kicinski u8 src_gpr, u8 size) 841e663fe38SJakub Kicinski { 842e663fe38SJakub Kicinski unsigned int i; 843e663fe38SJakub Kicinski 844e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 845e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 846e663fe38SJakub Kicinski 847e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 848b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 849e663fe38SJakub Kicinski 850e663fe38SJakub Kicinski return 0; 851e663fe38SJakub Kicinski } 852e663fe38SJakub Kicinski 853e663fe38SJakub Kicinski static int 854e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 855e663fe38SJakub Kicinski u64 imm, u8 size) 856e663fe38SJakub Kicinski { 857e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 858e663fe38SJakub Kicinski if (size == 8) 859e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 860e663fe38SJakub Kicinski 861e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 862b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 863e663fe38SJakub Kicinski 864e663fe38SJakub Kicinski return 0; 865e663fe38SJakub Kicinski } 866e663fe38SJakub Kicinski 867ee9133a8SJakub Kicinski typedef int 868ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 8692df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8702df03a50SJakub Kicinski bool needs_inc); 871a82b23fbSJakub Kicinski 872a82b23fbSJakub Kicinski static int 873a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 8742df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 8752df03a50SJakub Kicinski bool needs_inc) 876a82b23fbSJakub Kicinski { 8772df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 878a82b23fbSJakub Kicinski u32 idx, src_byte; 879a82b23fbSJakub Kicinski enum shf_sc sc; 880a82b23fbSJakub Kicinski swreg reg; 881a82b23fbSJakub Kicinski int shf; 882a82b23fbSJakub Kicinski u8 mask; 883a82b23fbSJakub Kicinski 884a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 885a82b23fbSJakub Kicinski return -EOPNOTSUPP; 886a82b23fbSJakub Kicinski 887a82b23fbSJakub Kicinski idx = off / 4; 888a82b23fbSJakub Kicinski 889a82b23fbSJakub Kicinski /* Move the entire word */ 890a82b23fbSJakub Kicinski if (size == 4) { 8912df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 8922df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 893a82b23fbSJakub Kicinski return 0; 894a82b23fbSJakub Kicinski } 895a82b23fbSJakub Kicinski 8962df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 8972df03a50SJakub Kicinski return -EOPNOTSUPP; 8982df03a50SJakub Kicinski 899a82b23fbSJakub Kicinski src_byte = off % 4; 900a82b23fbSJakub Kicinski 901a82b23fbSJakub Kicinski mask = (1 << size) - 1; 902a82b23fbSJakub Kicinski mask <<= dst_byte; 903a82b23fbSJakub Kicinski 904a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 905a82b23fbSJakub Kicinski return -EOPNOTSUPP; 906a82b23fbSJakub Kicinski 907a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 908a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 909a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 910a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 911a82b23fbSJakub Kicinski shf = 32 - shf; 912a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 913a82b23fbSJakub Kicinski } else { 914a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 915a82b23fbSJakub Kicinski } 916a82b23fbSJakub Kicinski 917a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 918a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 919a82b23fbSJakub Kicinski */ 920a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9212df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 922a82b23fbSJakub Kicinski } else { 923a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 9249a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 9259a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 9269a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 9279a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 9289a90c83cSJakub Kicinski */ 9299a90c83cSJakub Kicinski if (first || !new_gpr) 930a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 931a82b23fbSJakub Kicinski } 932a82b23fbSJakub Kicinski 933a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 934a82b23fbSJakub Kicinski 9352df03a50SJakub Kicinski if (should_inc) 9362df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 9372df03a50SJakub Kicinski 938a82b23fbSJakub Kicinski return 0; 939a82b23fbSJakub Kicinski } 940ee9133a8SJakub Kicinski 941ee9133a8SJakub Kicinski static int 942ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 9432df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9442df03a50SJakub Kicinski bool needs_inc) 945ee9133a8SJakub Kicinski { 9462df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 947ee9133a8SJakub Kicinski u32 idx, dst_byte; 948ee9133a8SJakub Kicinski enum shf_sc sc; 949ee9133a8SJakub Kicinski swreg reg; 950ee9133a8SJakub Kicinski int shf; 951ee9133a8SJakub Kicinski u8 mask; 952ee9133a8SJakub Kicinski 953ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 954ee9133a8SJakub Kicinski return -EOPNOTSUPP; 955ee9133a8SJakub Kicinski 956ee9133a8SJakub Kicinski idx = off / 4; 957ee9133a8SJakub Kicinski 958ee9133a8SJakub Kicinski /* Move the entire word */ 959ee9133a8SJakub Kicinski if (size == 4) { 9602df03a50SJakub Kicinski wrp_mov(nfp_prog, 9612df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 9622df03a50SJakub Kicinski reg_b(src)); 963ee9133a8SJakub Kicinski return 0; 964ee9133a8SJakub Kicinski } 965ee9133a8SJakub Kicinski 9662df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9672df03a50SJakub Kicinski return -EOPNOTSUPP; 9682df03a50SJakub Kicinski 969ee9133a8SJakub Kicinski dst_byte = off % 4; 970ee9133a8SJakub Kicinski 971ee9133a8SJakub Kicinski mask = (1 << size) - 1; 972ee9133a8SJakub Kicinski mask <<= dst_byte; 973ee9133a8SJakub Kicinski 974ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 975ee9133a8SJakub Kicinski return -EOPNOTSUPP; 976ee9133a8SJakub Kicinski 977ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 978ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 979ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 980ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 981ee9133a8SJakub Kicinski shf = 32 - shf; 982ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 983ee9133a8SJakub Kicinski } else { 984ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 985ee9133a8SJakub Kicinski } 986ee9133a8SJakub Kicinski 987ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 988ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 989ee9133a8SJakub Kicinski */ 990ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9912df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 992ee9133a8SJakub Kicinski } else { 993ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 9949a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 9959a90c83cSJakub Kicinski * the middle location will be overwritten fully. 9969a90c83cSJakub Kicinski */ 9979a90c83cSJakub Kicinski if (first || last) 998ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 999ee9133a8SJakub Kicinski } 1000ee9133a8SJakub Kicinski 1001ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 1002ee9133a8SJakub Kicinski 10039a90c83cSJakub Kicinski if (new_gpr || last) { 1004ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1005ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 10062df03a50SJakub Kicinski if (should_inc) 10072df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10089a90c83cSJakub Kicinski } 1009ee9133a8SJakub Kicinski 1010ee9133a8SJakub Kicinski return 0; 1011ee9133a8SJakub Kicinski } 1012ee9133a8SJakub Kicinski 1013ee9133a8SJakub Kicinski static int 1014ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1015b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1016b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1017ee9133a8SJakub Kicinski { 1018d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 10199a90c83cSJakub Kicinski bool first = true, last; 10202df03a50SJakub Kicinski bool needs_inc = false; 10212df03a50SJakub Kicinski swreg stack_off_reg; 1022a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1023ee9133a8SJakub Kicinski u32 gpr_byte = 0; 10242df03a50SJakub Kicinski bool lm3 = true; 1025ee9133a8SJakub Kicinski int ret; 1026ee9133a8SJakub Kicinski 1027b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1028b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1029b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1030b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1031b14157eeSJakub Kicinski */ 1032b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1033b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1034b14157eeSJakub Kicinski 1035b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1036b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1037b14157eeSJakub Kicinski 1038b14157eeSJakub Kicinski needs_inc = true; 1039b14157eeSJakub Kicinski } else if (off + size <= 64) { 10402df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 10412df03a50SJakub Kicinski lm3 = false; 10422df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 10432df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 10442df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 10452df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 10462df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 10472df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 10482df03a50SJakub Kicinski */ 10492df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 10502df03a50SJakub Kicinski stack_imm(nfp_prog)); 10512df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10522df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10532df03a50SJakub Kicinski 10542df03a50SJakub Kicinski off %= 32; 10552df03a50SJakub Kicinski } else { 10562df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 10572df03a50SJakub Kicinski stack_imm(nfp_prog)); 10582df03a50SJakub Kicinski 10592df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 10602df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 10612df03a50SJakub Kicinski 10622df03a50SJakub Kicinski needs_inc = true; 10632df03a50SJakub Kicinski } 10642df03a50SJakub Kicinski if (lm3) { 10652df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 10662df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 10672df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 10682df03a50SJakub Kicinski } 10692df03a50SJakub Kicinski 1070a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1071a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1072a82b23fbSJakub Kicinski 1073ee9133a8SJakub Kicinski while (size) { 1074ee9133a8SJakub Kicinski u32 slice_end; 1075ee9133a8SJakub Kicinski u8 slice_size; 1076ee9133a8SJakub Kicinski 1077ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1078ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1079ee9133a8SJakub Kicinski slice_size = slice_end - off; 1080ee9133a8SJakub Kicinski 10819a90c83cSJakub Kicinski last = slice_size == size; 10829a90c83cSJakub Kicinski 10832df03a50SJakub Kicinski if (needs_inc) 10842df03a50SJakub Kicinski off %= 4; 10852df03a50SJakub Kicinski 1086a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 10872df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1088ee9133a8SJakub Kicinski if (ret) 1089ee9133a8SJakub Kicinski return ret; 1090ee9133a8SJakub Kicinski 1091a82b23fbSJakub Kicinski prev_gpr = gpr; 10929a90c83cSJakub Kicinski first = false; 10939a90c83cSJakub Kicinski 1094ee9133a8SJakub Kicinski gpr_byte += slice_size; 1095ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1096ee9133a8SJakub Kicinski gpr_byte -= 4; 1097ee9133a8SJakub Kicinski gpr++; 1098ee9133a8SJakub Kicinski } 1099ee9133a8SJakub Kicinski 1100ee9133a8SJakub Kicinski size -= slice_size; 1101ee9133a8SJakub Kicinski off += slice_size; 1102ee9133a8SJakub Kicinski } 1103ee9133a8SJakub Kicinski 1104ee9133a8SJakub Kicinski return 0; 1105ee9133a8SJakub Kicinski } 1106ee9133a8SJakub Kicinski 1107d9ae7f2bSJakub Kicinski static void 1108d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1109d9ae7f2bSJakub Kicinski { 1110b3f868dfSJakub Kicinski swreg tmp_reg; 1111d9ae7f2bSJakub Kicinski 1112d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1113d9ae7f2bSJakub Kicinski if (!imm) 1114d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1115d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1116d9ae7f2bSJakub Kicinski return; 1117d9ae7f2bSJakub Kicinski } 1118d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1119d9ae7f2bSJakub Kicinski if (!~imm) 1120d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1121d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1122d9ae7f2bSJakub Kicinski return; 1123d9ae7f2bSJakub Kicinski } 1124d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1125d9ae7f2bSJakub Kicinski if (!~imm) 1126d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 11275d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1128d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1129d9ae7f2bSJakub Kicinski return; 1130d9ae7f2bSJakub Kicinski } 1131d9ae7f2bSJakub Kicinski 1132d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1133d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1134d9ae7f2bSJakub Kicinski } 1135d9ae7f2bSJakub Kicinski 1136d9ae7f2bSJakub Kicinski static int 1137d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1138d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1139d9ae7f2bSJakub Kicinski { 1140d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1141d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1142d9ae7f2bSJakub Kicinski 1143d9ae7f2bSJakub Kicinski if (skip) { 1144d9ae7f2bSJakub Kicinski meta->skip = true; 1145d9ae7f2bSJakub Kicinski return 0; 1146d9ae7f2bSJakub Kicinski } 1147d9ae7f2bSJakub Kicinski 1148d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1149d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1150d9ae7f2bSJakub Kicinski 1151d9ae7f2bSJakub Kicinski return 0; 1152d9ae7f2bSJakub Kicinski } 1153d9ae7f2bSJakub Kicinski 1154d9ae7f2bSJakub Kicinski static int 1155d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1156d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1157d9ae7f2bSJakub Kicinski { 1158d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1159d9ae7f2bSJakub Kicinski 1160d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1161d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1162d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1163d9ae7f2bSJakub Kicinski 1164d9ae7f2bSJakub Kicinski return 0; 1165d9ae7f2bSJakub Kicinski } 1166d9ae7f2bSJakub Kicinski 1167d9ae7f2bSJakub Kicinski static int 1168d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1169d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1170d9ae7f2bSJakub Kicinski { 1171d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1172d9ae7f2bSJakub Kicinski 1173d9ae7f2bSJakub Kicinski if (skip) { 1174d9ae7f2bSJakub Kicinski meta->skip = true; 1175d9ae7f2bSJakub Kicinski return 0; 1176d9ae7f2bSJakub Kicinski } 1177d9ae7f2bSJakub Kicinski 1178d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1179d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1180d9ae7f2bSJakub Kicinski 1181d9ae7f2bSJakub Kicinski return 0; 1182d9ae7f2bSJakub Kicinski } 1183d9ae7f2bSJakub Kicinski 1184d9ae7f2bSJakub Kicinski static int 1185d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1186d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1187d9ae7f2bSJakub Kicinski { 1188d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1189d9ae7f2bSJakub Kicinski 1190d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1191d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1192d9ae7f2bSJakub Kicinski 1193d9ae7f2bSJakub Kicinski return 0; 1194d9ae7f2bSJakub Kicinski } 1195d9ae7f2bSJakub Kicinski 1196d9ae7f2bSJakub Kicinski static void 1197d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1198d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1199d9ae7f2bSJakub Kicinski { 1200d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1201d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1202d9ae7f2bSJakub Kicinski } 1203d9ae7f2bSJakub Kicinski 1204d9ae7f2bSJakub Kicinski static int 1205d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1206d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1207d9ae7f2bSJakub Kicinski { 1208d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1209d9ae7f2bSJakub Kicinski 1210d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1211d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1212d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1213d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1214d9ae7f2bSJakub Kicinski 1215d9ae7f2bSJakub Kicinski return 0; 1216d9ae7f2bSJakub Kicinski } 1217d9ae7f2bSJakub Kicinski 121861dd8f00SJakub Kicinski static const struct jmp_code_map { 121961dd8f00SJakub Kicinski enum br_mask br_mask; 122061dd8f00SJakub Kicinski bool swap; 122161dd8f00SJakub Kicinski } jmp_code_map[] = { 122261dd8f00SJakub Kicinski [BPF_JGT >> 4] = { BR_BLO, true }, 122361dd8f00SJakub Kicinski [BPF_JGE >> 4] = { BR_BHS, false }, 122461dd8f00SJakub Kicinski [BPF_JLT >> 4] = { BR_BLO, false }, 122561dd8f00SJakub Kicinski [BPF_JLE >> 4] = { BR_BHS, true }, 122661dd8f00SJakub Kicinski [BPF_JSGT >> 4] = { BR_BLT, true }, 122761dd8f00SJakub Kicinski [BPF_JSGE >> 4] = { BR_BGE, false }, 122861dd8f00SJakub Kicinski [BPF_JSLT >> 4] = { BR_BLT, false }, 122961dd8f00SJakub Kicinski [BPF_JSLE >> 4] = { BR_BGE, true }, 123061dd8f00SJakub Kicinski }; 123161dd8f00SJakub Kicinski 123261dd8f00SJakub Kicinski static const struct jmp_code_map *nfp_jmp_code_get(struct nfp_insn_meta *meta) 123361dd8f00SJakub Kicinski { 123461dd8f00SJakub Kicinski unsigned int op; 123561dd8f00SJakub Kicinski 123661dd8f00SJakub Kicinski op = BPF_OP(meta->insn.code) >> 4; 123761dd8f00SJakub Kicinski /* br_mask of 0 is BR_BEQ which we don't use in jump code table */ 123861dd8f00SJakub Kicinski if (WARN_ONCE(op >= ARRAY_SIZE(jmp_code_map) || 123961dd8f00SJakub Kicinski !jmp_code_map[op].br_mask, 124061dd8f00SJakub Kicinski "no code found for jump instruction")) 124161dd8f00SJakub Kicinski return NULL; 124261dd8f00SJakub Kicinski 124361dd8f00SJakub Kicinski return &jmp_code_map[op]; 124461dd8f00SJakub Kicinski } 124561dd8f00SJakub Kicinski 124661dd8f00SJakub Kicinski static int cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1247d9ae7f2bSJakub Kicinski { 1248d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1249d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 125061dd8f00SJakub Kicinski const struct jmp_code_map *code; 12517bdc97beSJakub Kicinski enum alu_op alu_op, carry_op; 1252d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1253b3f868dfSJakub Kicinski swreg tmp_reg; 1254d9ae7f2bSJakub Kicinski 125561dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 125661dd8f00SJakub Kicinski if (!code) 125761dd8f00SJakub Kicinski return -EINVAL; 125861dd8f00SJakub Kicinski 12597bdc97beSJakub Kicinski alu_op = meta->jump_neg_op ? ALU_OP_ADD : ALU_OP_SUB; 12607bdc97beSJakub Kicinski carry_op = meta->jump_neg_op ? ALU_OP_ADD_C : ALU_OP_SUB_C; 12617bdc97beSJakub Kicinski 1262d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 126361dd8f00SJakub Kicinski if (!code->swap) 12647bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), alu_op, tmp_reg); 1265d9ae7f2bSJakub Kicinski else 12667bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, alu_op, reg_a(reg)); 1267d9ae7f2bSJakub Kicinski 1268d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 126961dd8f00SJakub Kicinski if (!code->swap) 1270d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 12717bdc97beSJakub Kicinski reg_a(reg + 1), carry_op, tmp_reg); 1272d9ae7f2bSJakub Kicinski else 1273d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 12747bdc97beSJakub Kicinski tmp_reg, carry_op, reg_a(reg + 1)); 1275d9ae7f2bSJakub Kicinski 127661dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1277d9ae7f2bSJakub Kicinski 1278d9ae7f2bSJakub Kicinski return 0; 1279d9ae7f2bSJakub Kicinski } 1280d9ae7f2bSJakub Kicinski 128161dd8f00SJakub Kicinski static int cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1282d9ae7f2bSJakub Kicinski { 1283d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 128461dd8f00SJakub Kicinski const struct jmp_code_map *code; 128526fa818dSJakub Kicinski u8 areg, breg; 128626fa818dSJakub Kicinski 128761dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 128861dd8f00SJakub Kicinski if (!code) 128961dd8f00SJakub Kicinski return -EINVAL; 129061dd8f00SJakub Kicinski 129126fa818dSJakub Kicinski areg = insn->dst_reg * 2; 129226fa818dSJakub Kicinski breg = insn->src_reg * 2; 1293d9ae7f2bSJakub Kicinski 129461dd8f00SJakub Kicinski if (code->swap) { 1295d9ae7f2bSJakub Kicinski areg ^= breg; 1296d9ae7f2bSJakub Kicinski breg ^= areg; 1297d9ae7f2bSJakub Kicinski areg ^= breg; 1298d9ae7f2bSJakub Kicinski } 1299d9ae7f2bSJakub Kicinski 1300d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1301d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1302d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 130361dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1304d9ae7f2bSJakub Kicinski 1305d9ae7f2bSJakub Kicinski return 0; 1306d9ae7f2bSJakub Kicinski } 1307d9ae7f2bSJakub Kicinski 13083119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 13093119d1fdSJakub Kicinski { 13103119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 13113119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 13123119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 13133119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 13143119d1fdSJakub Kicinski } 13153119d1fdSJakub Kicinski 13160d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 13170d49eaf4SJakub Kicinski { 13180d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 13190d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 13200d49eaf4SJakub Kicinski u32 ret_einval, end; 13210d49eaf4SJakub Kicinski 13220d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 13230d49eaf4SJakub Kicinski 13248231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 13258231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 13268231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 13278231f844SJakub Kicinski return -EINVAL; 13288231f844SJakub Kicinski 13298231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 13308231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 13318231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13328231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13338231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 13348231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13358231f844SJakub Kicinski 13368231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 13378231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 13388231f844SJakub Kicinski 13398231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 13408231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 13418231f844SJakub Kicinski */ 13428231f844SJakub Kicinski 13438231f844SJakub Kicinski return 0; 13448231f844SJakub Kicinski } 13458231f844SJakub Kicinski 13460d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 13470d49eaf4SJakub Kicinski end = ret_einval + 2; 13480d49eaf4SJakub Kicinski 13490d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 13500d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 13510d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 13520d49eaf4SJakub Kicinski 13530d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 13540d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13550d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 13560d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13570d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13580d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 13590d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 13600d49eaf4SJakub Kicinski 13610d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 13620d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 13630d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13640d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 13650d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 13660d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 13670d49eaf4SJakub Kicinski 13680d49eaf4SJakub Kicinski /* Load the ret code */ 13690d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 13700d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 13710d49eaf4SJakub Kicinski 13720d49eaf4SJakub Kicinski /* Modify the packet metadata */ 13730d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 13740d49eaf4SJakub Kicinski 13750d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 13762314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 13770d49eaf4SJakub Kicinski 13780d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13790d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13800d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 13810d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 13820d49eaf4SJakub Kicinski 13830d49eaf4SJakub Kicinski /* return -EINVAL target */ 13840d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 13850d49eaf4SJakub Kicinski return -EINVAL; 13860d49eaf4SJakub Kicinski 13870d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 13880d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 13890d49eaf4SJakub Kicinski 13900d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 13910d49eaf4SJakub Kicinski return -EINVAL; 13920d49eaf4SJakub Kicinski 13930d49eaf4SJakub Kicinski return 0; 13940d49eaf4SJakub Kicinski } 13950d49eaf4SJakub Kicinski 139677a3d311SJakub Kicinski static int 1397fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 139877a3d311SJakub Kicinski { 139977a3d311SJakub Kicinski bool load_lm_ptr; 140077a3d311SJakub Kicinski u32 ret_tgt; 140177a3d311SJakub Kicinski s64 lm_off; 140277a3d311SJakub Kicinski 140377a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 140477a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 14052f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 14062f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 140777a3d311SJakub Kicinski 140877a3d311SJakub Kicinski /* Set LM0 to start of key */ 140977a3d311SJakub Kicinski if (load_lm_ptr) 141077a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 141144d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 141244d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 141377a3d311SJakub Kicinski 1414fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 141577a3d311SJakub Kicinski 2, RELO_BR_HELPER); 141677a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 141777a3d311SJakub Kicinski 141877a3d311SJakub Kicinski /* Load map ID into A0 */ 1419b4264c96SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), reg_a(2)); 142077a3d311SJakub Kicinski 142177a3d311SJakub Kicinski /* Load the return address into B0 */ 142277a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 142377a3d311SJakub Kicinski 142477a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 142577a3d311SJakub Kicinski return -EINVAL; 142677a3d311SJakub Kicinski 142777a3d311SJakub Kicinski /* Reset the LM0 pointer */ 142877a3d311SJakub Kicinski if (!load_lm_ptr) 142977a3d311SJakub Kicinski return 0; 143077a3d311SJakub Kicinski 143177a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 143277a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 143377a3d311SJakub Kicinski 143477a3d311SJakub Kicinski return 0; 143577a3d311SJakub Kicinski } 143677a3d311SJakub Kicinski 1437df4a37d8SJakub Kicinski static int 1438df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1439df4a37d8SJakub Kicinski { 1440df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1441df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1442df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1443df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1444df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1445df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1446df4a37d8SJakub Kicinski return 0; 1447df4a37d8SJakub Kicinski } 1448df4a37d8SJakub Kicinski 14499816dd35SJakub Kicinski static int 14509816dd35SJakub Kicinski nfp_perf_event_output(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 14519816dd35SJakub Kicinski { 14529816dd35SJakub Kicinski swreg ptr_type; 14539816dd35SJakub Kicinski u32 ret_tgt; 14549816dd35SJakub Kicinski 14559816dd35SJakub Kicinski ptr_type = ur_load_imm_any(nfp_prog, meta->arg1.type, imm_a(nfp_prog)); 14569816dd35SJakub Kicinski 14579816dd35SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 14589816dd35SJakub Kicinski 14599816dd35SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 14609816dd35SJakub Kicinski 2, RELO_BR_HELPER); 14619816dd35SJakub Kicinski 14629816dd35SJakub Kicinski /* Load ptr type into A1 */ 14639816dd35SJakub Kicinski wrp_mov(nfp_prog, reg_a(1), ptr_type); 14649816dd35SJakub Kicinski 14659816dd35SJakub Kicinski /* Load the return address into B0 */ 14669816dd35SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 14679816dd35SJakub Kicinski 14689816dd35SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 14699816dd35SJakub Kicinski return -EINVAL; 14709816dd35SJakub Kicinski 14719816dd35SJakub Kicinski return 0; 14729816dd35SJakub Kicinski } 14739816dd35SJakub Kicinski 1474d985888fSJakub Kicinski static int 1475d985888fSJakub Kicinski nfp_queue_select(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1476d985888fSJakub Kicinski { 1477d985888fSJakub Kicinski u32 jmp_tgt; 1478d985888fSJakub Kicinski 1479d985888fSJakub Kicinski jmp_tgt = nfp_prog_current_offset(nfp_prog) + 5; 1480d985888fSJakub Kicinski 1481d985888fSJakub Kicinski /* Make sure the queue id fits into FW field */ 1482d985888fSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(meta->insn.src_reg * 2), 1483d985888fSJakub Kicinski ALU_OP_AND_NOT_B, reg_imm(0xff)); 1484d985888fSJakub Kicinski emit_br(nfp_prog, BR_BEQ, jmp_tgt, 2); 1485d985888fSJakub Kicinski 1486d985888fSJakub Kicinski /* Set the 'queue selected' bit and the queue value */ 1487d985888fSJakub Kicinski emit_shf(nfp_prog, pv_qsel_set(nfp_prog), 1488d985888fSJakub Kicinski pv_qsel_set(nfp_prog), SHF_OP_OR, reg_imm(1), 1489d985888fSJakub Kicinski SHF_SC_L_SHF, PKT_VEL_QSEL_SET_BIT); 1490d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1491d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_b(meta->insn.src_reg * 2), 1492d985888fSJakub Kicinski SHF_SC_NONE, 0); 1493d985888fSJakub Kicinski /* Delay slots end here, we will jump over next instruction if queue 1494d985888fSJakub Kicinski * value fits into the field. 1495d985888fSJakub Kicinski */ 1496d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1497d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_imm(NFP_NET_RXR_MAX), 1498d985888fSJakub Kicinski SHF_SC_NONE, 0); 1499d985888fSJakub Kicinski 1500d985888fSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, jmp_tgt)) 1501d985888fSJakub Kicinski return -EINVAL; 1502d985888fSJakub Kicinski 1503d985888fSJakub Kicinski return 0; 1504d985888fSJakub Kicinski } 1505d985888fSJakub Kicinski 1506d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1507d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1508d9ae7f2bSJakub Kicinski { 1509d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1510b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1511b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1512d9ae7f2bSJakub Kicinski 1513b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1514b14157eeSJakub Kicinski swreg stack_depth_reg; 1515b14157eeSJakub Kicinski 1516b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1517b14157eeSJakub Kicinski nfp_prog->stack_depth, 1518b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1519b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1520b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1521b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1522b14157eeSJakub Kicinski } else { 1523b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1524b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1525b14157eeSJakub Kicinski } 1526d9ae7f2bSJakub Kicinski 1527d9ae7f2bSJakub Kicinski return 0; 1528d9ae7f2bSJakub Kicinski } 1529d9ae7f2bSJakub Kicinski 1530d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1531d9ae7f2bSJakub Kicinski { 1532d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1533d9ae7f2bSJakub Kicinski 1534d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1535d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1536d9ae7f2bSJakub Kicinski 1537d9ae7f2bSJakub Kicinski return 0; 1538d9ae7f2bSJakub Kicinski } 1539d9ae7f2bSJakub Kicinski 1540d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1541d9ae7f2bSJakub Kicinski { 1542d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1543d9ae7f2bSJakub Kicinski } 1544d9ae7f2bSJakub Kicinski 1545d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1546d9ae7f2bSJakub Kicinski { 1547d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1548d9ae7f2bSJakub Kicinski } 1549d9ae7f2bSJakub Kicinski 1550d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1551d9ae7f2bSJakub Kicinski { 1552d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1553d9ae7f2bSJakub Kicinski } 1554d9ae7f2bSJakub Kicinski 1555d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1556d9ae7f2bSJakub Kicinski { 1557d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1558d9ae7f2bSJakub Kicinski } 1559d9ae7f2bSJakub Kicinski 1560d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1561d9ae7f2bSJakub Kicinski { 1562d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1563d9ae7f2bSJakub Kicinski } 1564d9ae7f2bSJakub Kicinski 1565d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1566d9ae7f2bSJakub Kicinski { 1567d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1568d9ae7f2bSJakub Kicinski } 1569d9ae7f2bSJakub Kicinski 1570d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1571d9ae7f2bSJakub Kicinski { 1572d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1573d9ae7f2bSJakub Kicinski 1574d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1575d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1576d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1577d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1578d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1579d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1580d9ae7f2bSJakub Kicinski 1581d9ae7f2bSJakub Kicinski return 0; 1582d9ae7f2bSJakub Kicinski } 1583d9ae7f2bSJakub Kicinski 1584d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1585d9ae7f2bSJakub Kicinski { 1586d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1587d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1588d9ae7f2bSJakub Kicinski 1589d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1590d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1591d9ae7f2bSJakub Kicinski 1592d9ae7f2bSJakub Kicinski return 0; 1593d9ae7f2bSJakub Kicinski } 1594d9ae7f2bSJakub Kicinski 1595d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1596d9ae7f2bSJakub Kicinski { 1597d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1598d9ae7f2bSJakub Kicinski 1599d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1600d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1601d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1602d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1603d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1604d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1605d9ae7f2bSJakub Kicinski 1606d9ae7f2bSJakub Kicinski return 0; 1607d9ae7f2bSJakub Kicinski } 1608d9ae7f2bSJakub Kicinski 1609d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1610d9ae7f2bSJakub Kicinski { 1611d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1612d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1613d9ae7f2bSJakub Kicinski 1614d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1615d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1616d9ae7f2bSJakub Kicinski 1617d9ae7f2bSJakub Kicinski return 0; 1618d9ae7f2bSJakub Kicinski } 1619d9ae7f2bSJakub Kicinski 1620254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1621254ef4d7SJiong Wang { 1622254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1623254ef4d7SJiong Wang 1624254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1625254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1626254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1627254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1628254ef4d7SJiong Wang 1629254ef4d7SJiong Wang return 0; 1630254ef4d7SJiong Wang } 1631254ef4d7SJiong Wang 1632d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1633d9ae7f2bSJakub Kicinski { 1634d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 16353cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1636d9ae7f2bSJakub Kicinski 16373cae1319SJakub Kicinski if (insn->imm < 32) { 16383cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 16393cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 16403cae1319SJakub Kicinski SHF_SC_R_DSHF, 32 - insn->imm); 16413cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 16423cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 16433cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm); 16443cae1319SJakub Kicinski } else if (insn->imm == 32) { 16453cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, dst); 16463cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 16473cae1319SJakub Kicinski } else if (insn->imm > 32) { 16483cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 16493cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst), 16503cae1319SJakub Kicinski SHF_SC_L_SHF, insn->imm - 32); 16513cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 16523cae1319SJakub Kicinski } 1653d9ae7f2bSJakub Kicinski 1654d9ae7f2bSJakub Kicinski return 0; 1655d9ae7f2bSJakub Kicinski } 1656d9ae7f2bSJakub Kicinski 1657d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1658d9ae7f2bSJakub Kicinski { 1659d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 16603cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1661d9ae7f2bSJakub Kicinski 16623cae1319SJakub Kicinski if (insn->imm < 32) { 16633cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 16643cae1319SJakub Kicinski reg_a(dst + 1), SHF_OP_NONE, reg_b(dst), 16653cae1319SJakub Kicinski SHF_SC_R_DSHF, insn->imm); 16663cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst + 1), 16673cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 16683cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm); 16693cae1319SJakub Kicinski } else if (insn->imm == 32) { 16703cae1319SJakub Kicinski wrp_reg_mov(nfp_prog, dst, dst + 1); 16713cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 16723cae1319SJakub Kicinski } else if (insn->imm > 32) { 16733cae1319SJakub Kicinski emit_shf(nfp_prog, reg_both(dst), 16743cae1319SJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(dst + 1), 16753cae1319SJakub Kicinski SHF_SC_R_SHF, insn->imm - 32); 16763cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 16773cae1319SJakub Kicinski } 1678d9ae7f2bSJakub Kicinski 1679d9ae7f2bSJakub Kicinski return 0; 1680d9ae7f2bSJakub Kicinski } 1681d9ae7f2bSJakub Kicinski 1682d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1683d9ae7f2bSJakub Kicinski { 1684d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1685d9ae7f2bSJakub Kicinski 1686d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1687d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1688d9ae7f2bSJakub Kicinski 1689d9ae7f2bSJakub Kicinski return 0; 1690d9ae7f2bSJakub Kicinski } 1691d9ae7f2bSJakub Kicinski 1692d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1693d9ae7f2bSJakub Kicinski { 1694d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1695d9ae7f2bSJakub Kicinski 1696d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1697d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1698d9ae7f2bSJakub Kicinski 1699d9ae7f2bSJakub Kicinski return 0; 1700d9ae7f2bSJakub Kicinski } 1701d9ae7f2bSJakub Kicinski 1702d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1703d9ae7f2bSJakub Kicinski { 1704d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1705d9ae7f2bSJakub Kicinski } 1706d9ae7f2bSJakub Kicinski 1707d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1708d9ae7f2bSJakub Kicinski { 1709d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1710d9ae7f2bSJakub Kicinski } 1711d9ae7f2bSJakub Kicinski 1712d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1713d9ae7f2bSJakub Kicinski { 1714d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1715d9ae7f2bSJakub Kicinski } 1716d9ae7f2bSJakub Kicinski 1717d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1718d9ae7f2bSJakub Kicinski { 1719d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1720d9ae7f2bSJakub Kicinski } 1721d9ae7f2bSJakub Kicinski 1722d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1723d9ae7f2bSJakub Kicinski { 1724d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1725d9ae7f2bSJakub Kicinski } 1726d9ae7f2bSJakub Kicinski 1727d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1728d9ae7f2bSJakub Kicinski { 1729d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1730d9ae7f2bSJakub Kicinski } 1731d9ae7f2bSJakub Kicinski 1732d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1733d9ae7f2bSJakub Kicinski { 1734d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1735d9ae7f2bSJakub Kicinski } 1736d9ae7f2bSJakub Kicinski 1737d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1738d9ae7f2bSJakub Kicinski { 1739d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1740d9ae7f2bSJakub Kicinski } 1741d9ae7f2bSJakub Kicinski 1742d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1743d9ae7f2bSJakub Kicinski { 1744d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1745d9ae7f2bSJakub Kicinski } 1746d9ae7f2bSJakub Kicinski 1747d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1748d9ae7f2bSJakub Kicinski { 1749d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1750d9ae7f2bSJakub Kicinski } 1751d9ae7f2bSJakub Kicinski 1752254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1753254ef4d7SJiong Wang { 1754254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1755254ef4d7SJiong Wang 1756254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1757254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1758254ef4d7SJiong Wang 1759254ef4d7SJiong Wang return 0; 1760254ef4d7SJiong Wang } 1761254ef4d7SJiong Wang 1762d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1763d9ae7f2bSJakub Kicinski { 1764d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1765d9ae7f2bSJakub Kicinski 1766d9ae7f2bSJakub Kicinski if (!insn->imm) 1767d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 1768d9ae7f2bSJakub Kicinski 1769d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 1770d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 1771d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 1772d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1773d9ae7f2bSJakub Kicinski 1774d9ae7f2bSJakub Kicinski return 0; 1775d9ae7f2bSJakub Kicinski } 1776d9ae7f2bSJakub Kicinski 17773119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 17783119d1fdSJakub Kicinski { 17793119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 17803119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 17813119d1fdSJakub Kicinski 17823119d1fdSJakub Kicinski switch (insn->imm) { 17833119d1fdSJakub Kicinski case 16: 17843119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 17853119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 17863119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 17873119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 17883119d1fdSJakub Kicinski 17893119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 17903119d1fdSJakub Kicinski break; 17913119d1fdSJakub Kicinski case 32: 17923119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 17933119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 17943119d1fdSJakub Kicinski break; 17953119d1fdSJakub Kicinski case 64: 17963119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 17973119d1fdSJakub Kicinski 17983119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 17993119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 18003119d1fdSJakub Kicinski break; 18013119d1fdSJakub Kicinski } 18023119d1fdSJakub Kicinski 18033119d1fdSJakub Kicinski return 0; 18043119d1fdSJakub Kicinski } 18053119d1fdSJakub Kicinski 1806d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1807d9ae7f2bSJakub Kicinski { 18089f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 18099f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 18109f16c8abSJakub Kicinski u8 dst; 18119f16c8abSJakub Kicinski 18129f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 18139f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 18149f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 18159f16c8abSJakub Kicinski 18169f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 18179f16c8abSJakub Kicinski 18189f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 18199f16c8abSJakub Kicinski if (imm_hi == imm_lo) 18209f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 18219f16c8abSJakub Kicinski else 18229f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 1823d9ae7f2bSJakub Kicinski 1824d9ae7f2bSJakub Kicinski return 0; 1825d9ae7f2bSJakub Kicinski } 1826d9ae7f2bSJakub Kicinski 1827d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1828d9ae7f2bSJakub Kicinski { 1829d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 1830d9ae7f2bSJakub Kicinski return 0; 1831d9ae7f2bSJakub Kicinski } 1832d9ae7f2bSJakub Kicinski 1833d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1834d9ae7f2bSJakub Kicinski { 1835d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 1836d9ae7f2bSJakub Kicinski } 1837d9ae7f2bSJakub Kicinski 1838d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1839d9ae7f2bSJakub Kicinski { 1840d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 1841d9ae7f2bSJakub Kicinski } 1842d9ae7f2bSJakub Kicinski 1843d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1844d9ae7f2bSJakub Kicinski { 1845d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 1846d9ae7f2bSJakub Kicinski } 1847d9ae7f2bSJakub Kicinski 1848d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1849d9ae7f2bSJakub Kicinski { 1850d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 18510a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 1852d9ae7f2bSJakub Kicinski } 1853d9ae7f2bSJakub Kicinski 1854d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1855d9ae7f2bSJakub Kicinski { 1856d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 18570a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 1858d9ae7f2bSJakub Kicinski } 1859d9ae7f2bSJakub Kicinski 1860d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1861d9ae7f2bSJakub Kicinski { 1862d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 18630a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 1864d9ae7f2bSJakub Kicinski } 1865d9ae7f2bSJakub Kicinski 1866a82b23fbSJakub Kicinski static int 1867a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1868d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 1869a82b23fbSJakub Kicinski { 1870d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 1871b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 1872b14157eeSJakub Kicinski true, wrp_lmem_load); 1873a82b23fbSJakub Kicinski } 1874a82b23fbSJakub Kicinski 1875943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1876943c57b9SJakub Kicinski u8 size) 1877d9ae7f2bSJakub Kicinski { 1878bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1879bfddbc8aSJakub Kicinski 1880943c57b9SJakub Kicinski switch (meta->insn.off) { 1881c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 1882c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 1883943c57b9SJakub Kicinski return -EOPNOTSUPP; 1884bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 1885bfddbc8aSJakub Kicinski break; 1886c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 1887c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 1888bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1889bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1890bfddbc8aSJakub Kicinski break; 1891c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 1892c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 1893bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 1894bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 1895bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1896943c57b9SJakub Kicinski break; 1897943c57b9SJakub Kicinski default: 1898d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 1899943c57b9SJakub Kicinski } 1900943c57b9SJakub Kicinski 1901943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1902d9ae7f2bSJakub Kicinski 1903d9ae7f2bSJakub Kicinski return 0; 1904d9ae7f2bSJakub Kicinski } 1905d9ae7f2bSJakub Kicinski 1906943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1907943c57b9SJakub Kicinski u8 size) 1908d9ae7f2bSJakub Kicinski { 1909b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 1910d9ae7f2bSJakub Kicinski 1911943c57b9SJakub Kicinski switch (meta->insn.off) { 1912c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 1913c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 1914c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1915c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 1916943c57b9SJakub Kicinski break; 1917c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 1918c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 1919c6c580d7SJakub Kicinski return -EOPNOTSUPP; 1920943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 1921943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 1922943c57b9SJakub Kicinski break; 1923943c57b9SJakub Kicinski default: 1924943c57b9SJakub Kicinski return -EOPNOTSUPP; 1925943c57b9SJakub Kicinski } 1926d9ae7f2bSJakub Kicinski 1927943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1928d9ae7f2bSJakub Kicinski 1929d9ae7f2bSJakub Kicinski return 0; 1930d9ae7f2bSJakub Kicinski } 1931d9ae7f2bSJakub Kicinski 19322ca71441SJakub Kicinski static int 19332ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 19342ca71441SJakub Kicinski unsigned int size) 19352ca71441SJakub Kicinski { 19362ca71441SJakub Kicinski swreg tmp_reg; 19372ca71441SJakub Kicinski 19382ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 19392ca71441SJakub Kicinski 19403dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 19413dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 19423dd43c33SJakub Kicinski } 19433dd43c33SJakub Kicinski 19443dd43c33SJakub Kicinski static int 19453dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 19463dd43c33SJakub Kicinski unsigned int size) 19473dd43c33SJakub Kicinski { 19483dd43c33SJakub Kicinski swreg tmp_reg; 19493dd43c33SJakub Kicinski 19503dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 19513dd43c33SJakub Kicinski 19523dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 19533dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 19542ca71441SJakub Kicinski } 19552ca71441SJakub Kicinski 1956be759237SJiong Wang static void 1957be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 1958be759237SJiong Wang struct nfp_insn_meta *meta) 1959be759237SJiong Wang { 1960be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 1961be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 1962be759237SJiong Wang swreg src_base, off; 1963be759237SJiong Wang u8 xfer_num, len; 1964be759237SJiong Wang bool indir; 1965be759237SJiong Wang 1966be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 1967be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 1968be759237SJiong Wang len = range_end - range_start; 1969be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 1970be759237SJiong Wang 1971be759237SJiong Wang indir = len > 8 * REG_WIDTH; 1972be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 1973be759237SJiong Wang if (indir) 1974be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 1975be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 1976be759237SJiong Wang 1977be759237SJiong Wang /* Cache memory into transfer-in registers. */ 1978be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 1979b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 1980be759237SJiong Wang } 1981be759237SJiong Wang 1982be759237SJiong Wang static int 198391ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 198491ff69e8SJiong Wang struct nfp_insn_meta *meta, 198591ff69e8SJiong Wang unsigned int size) 198691ff69e8SJiong Wang { 198791ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 198891ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 198991ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 199091ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 199191ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 199291ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 199391ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 199491ff69e8SJiong Wang 199591ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 199691ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 199791ff69e8SJiong Wang src_lo = reg_xfer(idx); 199891ff69e8SJiong Wang 199991ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 200091ff69e8SJiong Wang if (size > REG_WIDTH - off) { 200191ff69e8SJiong Wang /* Calculate the part in the second register. */ 200291ff69e8SJiong Wang len_lo = REG_WIDTH - off; 200391ff69e8SJiong Wang len_mid = size - len_lo; 200491ff69e8SJiong Wang 200591ff69e8SJiong Wang /* Calculate the part in the third register. */ 200691ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 200791ff69e8SJiong Wang len_mid = REG_WIDTH; 200891ff69e8SJiong Wang } 200991ff69e8SJiong Wang 201091ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 201191ff69e8SJiong Wang 201291ff69e8SJiong Wang if (!len_mid) { 201391ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 201491ff69e8SJiong Wang return 0; 201591ff69e8SJiong Wang } 201691ff69e8SJiong Wang 201791ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 201891ff69e8SJiong Wang 201991ff69e8SJiong Wang if (size <= REG_WIDTH) { 202091ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 202191ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 202291ff69e8SJiong Wang } else { 202391ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 202491ff69e8SJiong Wang 202591ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 202691ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 202791ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 202891ff69e8SJiong Wang REG_WIDTH - len_lo); 202991ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 203091ff69e8SJiong Wang len_lo); 203191ff69e8SJiong Wang } 203291ff69e8SJiong Wang 203391ff69e8SJiong Wang return 0; 203491ff69e8SJiong Wang } 203591ff69e8SJiong Wang 203691ff69e8SJiong Wang static int 2037be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 2038be759237SJiong Wang struct nfp_insn_meta *meta, 2039be759237SJiong Wang unsigned int size) 2040be759237SJiong Wang { 2041be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 2042be759237SJiong Wang u8 dst_gpr, idx; 2043be759237SJiong Wang 2044be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 2045be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 2046be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 2047be759237SJiong Wang dst_lo = reg_both(dst_gpr); 2048be759237SJiong Wang src_lo = reg_xfer(idx); 2049be759237SJiong Wang 2050be759237SJiong Wang if (size < REG_WIDTH) { 2051be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 2052be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2053be759237SJiong Wang } else if (size == REG_WIDTH) { 2054be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2055be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2056be759237SJiong Wang } else { 2057be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 2058be759237SJiong Wang 2059be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2060be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 2061be759237SJiong Wang } 2062be759237SJiong Wang 2063be759237SJiong Wang return 0; 2064be759237SJiong Wang } 2065be759237SJiong Wang 2066be759237SJiong Wang static int 2067be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 2068be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 2069be759237SJiong Wang { 2070be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 2071be759237SJiong Wang 207291ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 2073be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 207491ff69e8SJiong Wang 207591ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 2076be759237SJiong Wang } 2077be759237SJiong Wang 20782ca71441SJakub Kicinski static int 20792ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 20802ca71441SJakub Kicinski unsigned int size) 20812ca71441SJakub Kicinski { 20829879a381SJiong Wang if (meta->ldst_gather_len) 20839879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 20849879a381SJiong Wang 20852ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2086012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 20872ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 20882ca71441SJakub Kicinski else 20892ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 20902ca71441SJakub Kicinski } 20912ca71441SJakub Kicinski 2092be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2093be759237SJiong Wang if (meta->pkt_cache.range_end) { 2094be759237SJiong Wang if (meta->pkt_cache.do_init) 2095be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2096be759237SJiong Wang 2097be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2098be759237SJiong Wang } else { 20992ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2100be759237SJiong Wang } 2101be759237SJiong Wang } 21022ca71441SJakub Kicinski 2103a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2104d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2105d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2106a82b23fbSJakub Kicinski 21073dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 21083dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 21093dd43c33SJakub Kicinski 21102ca71441SJakub Kicinski return -EOPNOTSUPP; 21112ca71441SJakub Kicinski } 21122ca71441SJakub Kicinski 21132ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21142ca71441SJakub Kicinski { 21152ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 21162ca71441SJakub Kicinski } 21172ca71441SJakub Kicinski 21182ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21192ca71441SJakub Kicinski { 21202ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 21212ca71441SJakub Kicinski } 21222ca71441SJakub Kicinski 2123d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2124d9ae7f2bSJakub Kicinski { 21252ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 21262ca71441SJakub Kicinski } 21272ca71441SJakub Kicinski 21282ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21292ca71441SJakub Kicinski { 21302ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2131d9ae7f2bSJakub Kicinski } 2132d9ae7f2bSJakub Kicinski 2133e663fe38SJakub Kicinski static int 2134e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2135e663fe38SJakub Kicinski unsigned int size) 2136d9ae7f2bSJakub Kicinski { 2137e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2138e663fe38SJakub Kicinski swreg off_reg; 2139e663fe38SJakub Kicinski 2140e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2141e663fe38SJakub Kicinski 2142e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2143e663fe38SJakub Kicinski imm, size); 2144e663fe38SJakub Kicinski } 2145e663fe38SJakub Kicinski 2146e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2147e663fe38SJakub Kicinski unsigned int size) 2148e663fe38SJakub Kicinski { 2149e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2150e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2151e663fe38SJakub Kicinski 2152d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2153d9ae7f2bSJakub Kicinski } 2154d9ae7f2bSJakub Kicinski 2155e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2156d9ae7f2bSJakub Kicinski { 2157e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2158e663fe38SJakub Kicinski } 2159e663fe38SJakub Kicinski 2160e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2161e663fe38SJakub Kicinski { 2162e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2163e663fe38SJakub Kicinski } 2164e663fe38SJakub Kicinski 2165e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2166e663fe38SJakub Kicinski { 2167e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2168e663fe38SJakub Kicinski } 2169e663fe38SJakub Kicinski 2170e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2171e663fe38SJakub Kicinski { 2172e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2173e663fe38SJakub Kicinski } 2174e663fe38SJakub Kicinski 2175e663fe38SJakub Kicinski static int 2176e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2177e663fe38SJakub Kicinski unsigned int size) 2178e663fe38SJakub Kicinski { 2179e663fe38SJakub Kicinski swreg off_reg; 2180e663fe38SJakub Kicinski 2181e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2182e663fe38SJakub Kicinski 2183e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2184e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2185e663fe38SJakub Kicinski } 2186e663fe38SJakub Kicinski 2187e663fe38SJakub Kicinski static int 2188ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2189d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2190ee9133a8SJakub Kicinski { 2191d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2192b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2193b14157eeSJakub Kicinski false, wrp_lmem_store); 2194ee9133a8SJakub Kicinski } 2195ee9133a8SJakub Kicinski 2196d985888fSJakub Kicinski static int mem_stx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2197d985888fSJakub Kicinski { 2198d985888fSJakub Kicinski switch (meta->insn.off) { 2199d985888fSJakub Kicinski case offsetof(struct xdp_md, rx_queue_index): 2200d985888fSJakub Kicinski return nfp_queue_select(nfp_prog, meta); 2201d985888fSJakub Kicinski } 2202d985888fSJakub Kicinski 2203d985888fSJakub Kicinski WARN_ON_ONCE(1); /* verifier should have rejected bad accesses */ 2204d985888fSJakub Kicinski return -EOPNOTSUPP; 2205d985888fSJakub Kicinski } 2206d985888fSJakub Kicinski 2207ee9133a8SJakub Kicinski static int 2208e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2209e663fe38SJakub Kicinski unsigned int size) 2210e663fe38SJakub Kicinski { 2211e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2212e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2213e663fe38SJakub Kicinski 2214ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2215d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2216d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2217ee9133a8SJakub Kicinski 2218d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2219d9ae7f2bSJakub Kicinski } 2220d9ae7f2bSJakub Kicinski 2221e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2222e663fe38SJakub Kicinski { 2223e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2224e663fe38SJakub Kicinski } 2225e663fe38SJakub Kicinski 2226e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2227e663fe38SJakub Kicinski { 2228e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2229e663fe38SJakub Kicinski } 2230e663fe38SJakub Kicinski 2231d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2232d9ae7f2bSJakub Kicinski { 2233d985888fSJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) 2234d985888fSJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 2235d985888fSJakub Kicinski return mem_stx_xdp(nfp_prog, meta); 2236e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2237e663fe38SJakub Kicinski } 22382ca71441SJakub Kicinski 2239e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2240e663fe38SJakub Kicinski { 2241e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2242d9ae7f2bSJakub Kicinski } 2243d9ae7f2bSJakub Kicinski 2244dcb0c27fSJakub Kicinski static int 2245dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2246dcb0c27fSJakub Kicinski { 2247dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2248dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 224941aed09cSJakub Kicinski unsigned int full_add, out; 225041aed09cSJakub Kicinski swreg addra, addrb, off; 2251dcb0c27fSJakub Kicinski 2252dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2253dcb0c27fSJakub Kicinski 225441aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 225541aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 225641aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 225741aed09cSJakub Kicinski * code for both. 225841aed09cSJakub Kicinski */ 225941aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 226041aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 226141aed09cSJakub Kicinski 226241aed09cSJakub Kicinski if (meta->insn.off) { 226341aed09cSJakub Kicinski out += 2; 226441aed09cSJakub Kicinski full_add += 2; 226541aed09cSJakub Kicinski } 226641aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 226741aed09cSJakub Kicinski out += 3; 226841aed09cSJakub Kicinski full_add += 3; 226941aed09cSJakub Kicinski } 227041aed09cSJakub Kicinski if (meta->xadd_over_16bit) 227141aed09cSJakub Kicinski out += 2 + is64; 227241aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 227341aed09cSJakub Kicinski out += 5; 227441aed09cSJakub Kicinski full_add += 5; 227541aed09cSJakub Kicinski } 227641aed09cSJakub Kicinski 227741aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 227841aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 227941aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 228041aed09cSJakub Kicinski 228141aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 228241aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 228341aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 228441aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 228541aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 228641aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 228741aed09cSJakub Kicinski /* defer for add */ 228841aed09cSJakub Kicinski } 228941aed09cSJakub Kicinski 2290dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2291dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2292dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2293dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2294dcb0c27fSJakub Kicinski } else { 2295dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2296dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2297dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2298dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2299dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2300dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2301dcb0c27fSJakub Kicinski } 2302dcb0c27fSJakub Kicinski 230341aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 230441aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 230541aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 230641aed09cSJakub Kicinski 2307dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2308dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2309dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2310dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2311dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2312dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2313b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2314dcb0c27fSJakub Kicinski 231541aed09cSJakub Kicinski if (meta->xadd_over_16bit) 231641aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 231741aed09cSJakub Kicinski } 231841aed09cSJakub Kicinski 231941aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 232041aed09cSJakub Kicinski return -EINVAL; 232141aed09cSJakub Kicinski 232241aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 232341aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 232441aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 232541aed09cSJakub Kicinski addra, addrb, is64 << 2, 232641aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 232741aed09cSJakub Kicinski 232841aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 232941aed09cSJakub Kicinski if (is64) 233041aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 233141aed09cSJakub Kicinski } 233241aed09cSJakub Kicinski 233341aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 233441aed09cSJakub Kicinski return -EINVAL; 233541aed09cSJakub Kicinski 2336dcb0c27fSJakub Kicinski return 0; 2337dcb0c27fSJakub Kicinski } 2338dcb0c27fSJakub Kicinski 2339dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2340dcb0c27fSJakub Kicinski { 2341dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2342dcb0c27fSJakub Kicinski } 2343dcb0c27fSJakub Kicinski 2344dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2345dcb0c27fSJakub Kicinski { 2346dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2347dcb0c27fSJakub Kicinski } 2348dcb0c27fSJakub Kicinski 2349d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2350d9ae7f2bSJakub Kicinski { 2351d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2352d9ae7f2bSJakub Kicinski 2353d9ae7f2bSJakub Kicinski return 0; 2354d9ae7f2bSJakub Kicinski } 2355d9ae7f2bSJakub Kicinski 2356d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2357d9ae7f2bSJakub Kicinski { 2358d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2359d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2360b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2361b3f868dfSJakub Kicinski 2362b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2363b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2364d9ae7f2bSJakub Kicinski 2365d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2366d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2367d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2368d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2369d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2370d9ae7f2bSJakub Kicinski } 2371d9ae7f2bSJakub Kicinski 2372d9ae7f2bSJakub Kicinski if (imm >> 32) { 2373d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2374d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2375d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2376d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2377d9ae7f2bSJakub Kicinski } 2378d9ae7f2bSJakub Kicinski 2379d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2380d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2381d9ae7f2bSJakub Kicinski 2382d9ae7f2bSJakub Kicinski return 0; 2383d9ae7f2bSJakub Kicinski } 2384d9ae7f2bSJakub Kicinski 2385d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2386d9ae7f2bSJakub Kicinski { 2387d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2388d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2389b3f868dfSJakub Kicinski swreg tmp_reg; 2390d9ae7f2bSJakub Kicinski 2391d9ae7f2bSJakub Kicinski if (!imm) { 2392d9ae7f2bSJakub Kicinski meta->skip = true; 2393d9ae7f2bSJakub Kicinski return 0; 2394d9ae7f2bSJakub Kicinski } 2395d9ae7f2bSJakub Kicinski 2396d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2397d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2398d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2399d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2400d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2401d9ae7f2bSJakub Kicinski } 2402d9ae7f2bSJakub Kicinski 2403d9ae7f2bSJakub Kicinski if (imm >> 32) { 2404d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2405d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2406d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2407d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2408d9ae7f2bSJakub Kicinski } 2409d9ae7f2bSJakub Kicinski 2410d9ae7f2bSJakub Kicinski return 0; 2411d9ae7f2bSJakub Kicinski } 2412d9ae7f2bSJakub Kicinski 2413d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2414d9ae7f2bSJakub Kicinski { 2415d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2416d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2417b3f868dfSJakub Kicinski swreg tmp_reg; 2418d9ae7f2bSJakub Kicinski 2419d9ae7f2bSJakub Kicinski if (!imm) { 2420d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2421d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2422d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 242382837370SJakub Kicinski return 0; 2424d9ae7f2bSJakub Kicinski } 2425d9ae7f2bSJakub Kicinski 2426d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2427d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2428d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2429d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2430d9ae7f2bSJakub Kicinski 2431d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2432d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2433d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2434d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2435d9ae7f2bSJakub Kicinski 2436d9ae7f2bSJakub Kicinski return 0; 2437d9ae7f2bSJakub Kicinski } 2438d9ae7f2bSJakub Kicinski 2439d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2440d9ae7f2bSJakub Kicinski { 2441d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2442d9ae7f2bSJakub Kicinski 2443d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2444d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2445d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2446d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2447d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2448d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2449d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2450d9ae7f2bSJakub Kicinski 2451d9ae7f2bSJakub Kicinski return 0; 2452d9ae7f2bSJakub Kicinski } 2453d9ae7f2bSJakub Kicinski 2454d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2455d9ae7f2bSJakub Kicinski { 2456d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2457d9ae7f2bSJakub Kicinski } 2458d9ae7f2bSJakub Kicinski 2459d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2460d9ae7f2bSJakub Kicinski { 2461d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2462d9ae7f2bSJakub Kicinski } 2463d9ae7f2bSJakub Kicinski 24642cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24652cb230bdSJakub Kicinski { 24662cb230bdSJakub Kicinski switch (meta->insn.imm) { 24670d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 24680d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 246977a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 247044d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 2471bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 2472fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 2473df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 2474df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 24759816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 24769816dd35SJakub Kicinski return nfp_perf_event_output(nfp_prog, meta); 24772cb230bdSJakub Kicinski default: 24782cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 24792cb230bdSJakub Kicinski return -EOPNOTSUPP; 24802cb230bdSJakub Kicinski } 24812cb230bdSJakub Kicinski } 24822cb230bdSJakub Kicinski 2483d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2484d9ae7f2bSJakub Kicinski { 2485e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2486d9ae7f2bSJakub Kicinski 2487d9ae7f2bSJakub Kicinski return 0; 2488d9ae7f2bSJakub Kicinski } 2489d9ae7f2bSJakub Kicinski 2490d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2491d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2492d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2493d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2494d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2495d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2496d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2497d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2498d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2499d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2500d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2501d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2502d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2503254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2504d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2505d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2506d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2507d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2508d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2509d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2510d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2511d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2512d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2513d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2514d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2515d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2516d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2517d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2518254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2519d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 25203119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2521d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2522d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2523d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2524d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2525d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2526d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2527d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 25282ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 25292ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2530d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 25312ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2532e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2533e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2534d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2535e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2536dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 2537dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 2538e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2539e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2540e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2541e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2542d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2543d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 254461dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = cmp_imm, 254561dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = cmp_imm, 254661dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_K] = cmp_imm, 254761dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_K] = cmp_imm, 254861dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_K] = cmp_imm, 254961dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_K] = cmp_imm, 255061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_K] = cmp_imm, 255161dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_K] = cmp_imm, 2552d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2553d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2554d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 255561dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = cmp_reg, 255661dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = cmp_reg, 255761dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_X] = cmp_reg, 255861dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_X] = cmp_reg, 255961dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_X] = cmp_reg, 256061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_X] = cmp_reg, 256161dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_X] = cmp_reg, 256261dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_X] = cmp_reg, 2563d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2564d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 25652cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2566d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2567d9ae7f2bSJakub Kicinski }; 2568d9ae7f2bSJakub Kicinski 2569d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2570d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2571d9ae7f2bSJakub Kicinski { 25725b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2573854dc87dSJiong Wang u32 idx, br_idx; 2574d9ae7f2bSJakub Kicinski 2575854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2576d9ae7f2bSJakub Kicinski if (meta->skip) 2577d9ae7f2bSJakub Kicinski continue; 25782cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 25792cb230bdSJakub Kicinski continue; 2580d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2581d9ae7f2bSJakub Kicinski continue; 2582d9ae7f2bSJakub Kicinski 25835b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 25842314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 25855b674140SJiong Wang else 25862314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2587854dc87dSJiong Wang 2588d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2589d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2590d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2591d9ae7f2bSJakub Kicinski return -ELOOP; 2592d9ae7f2bSJakub Kicinski } 2593d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 25942314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 25952314fe9eSJakub Kicinski RELO_BR_REL) 2596d9ae7f2bSJakub Kicinski continue; 2597d9ae7f2bSJakub Kicinski 25985b674140SJiong Wang if (!meta->jmp_dst) { 25995b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2600d9ae7f2bSJakub Kicinski return -ELOOP; 2601d9ae7f2bSJakub Kicinski } 2602d9ae7f2bSJakub Kicinski 26035b674140SJiong Wang jmp_dst = meta->jmp_dst; 2604854dc87dSJiong Wang 26055b674140SJiong Wang if (jmp_dst->skip) { 2606d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2607d9ae7f2bSJakub Kicinski return -ELOOP; 2608d9ae7f2bSJakub Kicinski } 2609d9ae7f2bSJakub Kicinski 26102314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2611d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2612d9ae7f2bSJakub Kicinski continue; 26135b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2614d9ae7f2bSJakub Kicinski } 2615d9ae7f2bSJakub Kicinski } 2616d9ae7f2bSJakub Kicinski 2617d9ae7f2bSJakub Kicinski return 0; 2618d9ae7f2bSJakub Kicinski } 2619d9ae7f2bSJakub Kicinski 2620d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2621d9ae7f2bSJakub Kicinski { 262218e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 262318e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 262418e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2625d9ae7f2bSJakub Kicinski } 2626d9ae7f2bSJakub Kicinski 2627d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2628d9ae7f2bSJakub Kicinski { 2629d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2630d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2631d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2632d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2633d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2634d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2635d9ae7f2bSJakub Kicinski * 2636d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2637d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2638d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2639d9ae7f2bSJakub Kicinski * packets up the stack. 2640d9ae7f2bSJakub Kicinski */ 2641d9ae7f2bSJakub Kicinski /* Target for aborts */ 2642d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2643d9ae7f2bSJakub Kicinski 2644e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2645d9ae7f2bSJakub Kicinski 2646c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2647d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2648d9ae7f2bSJakub Kicinski 2649d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2650d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2651d9ae7f2bSJakub Kicinski 2652d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2653d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2654d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2655c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2656d9ae7f2bSJakub Kicinski 2657d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2658d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2659d9ae7f2bSJakub Kicinski 2660d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2661d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2662d9ae7f2bSJakub Kicinski 2663d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2664d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2665d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2666d9ae7f2bSJakub Kicinski 2667d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2668d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2669d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2670d9ae7f2bSJakub Kicinski 2671e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2672d9ae7f2bSJakub Kicinski 2673d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2674d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2675d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2676d9ae7f2bSJakub Kicinski } 2677d9ae7f2bSJakub Kicinski 2678d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2679d9ae7f2bSJakub Kicinski { 2680d9ae7f2bSJakub Kicinski /* XDP return codes: 2681d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2682d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2683d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2684d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2685d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2686d9ae7f2bSJakub Kicinski */ 2687d9ae7f2bSJakub Kicinski /* Target for aborts */ 2688d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2689d9ae7f2bSJakub Kicinski 2690e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2691d9ae7f2bSJakub Kicinski 2692c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2693d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2694d9ae7f2bSJakub Kicinski 2695d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2696d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2697d9ae7f2bSJakub Kicinski 2698d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2699d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2700d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2701d9ae7f2bSJakub Kicinski 2702d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2703d9ae7f2bSJakub Kicinski 2704d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2705d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2706d9ae7f2bSJakub Kicinski 2707d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2708d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2709d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2710d9ae7f2bSJakub Kicinski 2711e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2712d9ae7f2bSJakub Kicinski 2713c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2714d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2715d9ae7f2bSJakub Kicinski } 2716d9ae7f2bSJakub Kicinski 2717d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2718d9ae7f2bSJakub Kicinski { 2719012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2720012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2721d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2722d9ae7f2bSJakub Kicinski break; 2723012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2724d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2725d9ae7f2bSJakub Kicinski break; 2726012bb8a8SJakub Kicinski default: 2727012bb8a8SJakub Kicinski WARN_ON(1); 2728d9ae7f2bSJakub Kicinski } 2729d9ae7f2bSJakub Kicinski } 2730d9ae7f2bSJakub Kicinski 2731d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2732d9ae7f2bSJakub Kicinski { 2733d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2734ff42bb9fSJakub Kicinski int err; 2735d9ae7f2bSJakub Kicinski 2736d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2737d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2738d9ae7f2bSJakub Kicinski return nfp_prog->error; 2739d9ae7f2bSJakub Kicinski 2740d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2741d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2742d9ae7f2bSJakub Kicinski 2743d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2744d9ae7f2bSJakub Kicinski 2745d9ae7f2bSJakub Kicinski if (meta->skip) { 2746d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2747d9ae7f2bSJakub Kicinski continue; 2748d9ae7f2bSJakub Kicinski } 2749d9ae7f2bSJakub Kicinski 2750d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2751d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2752d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2753d9ae7f2bSJakub Kicinski if (!cb) 2754d9ae7f2bSJakub Kicinski return -ENOENT; 2755d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2756d9ae7f2bSJakub Kicinski if (err) 2757d9ae7f2bSJakub Kicinski return err; 2758e8a4796eSJakub Kicinski if (nfp_prog->error) 2759e8a4796eSJakub Kicinski return nfp_prog->error; 2760d9ae7f2bSJakub Kicinski 2761d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2762d9ae7f2bSJakub Kicinski } 2763d9ae7f2bSJakub Kicinski 2764854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 2765854dc87dSJiong Wang 2766d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 2767d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2768d9ae7f2bSJakub Kicinski return nfp_prog->error; 2769d9ae7f2bSJakub Kicinski 2770ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 27711c03e03fSJakub Kicinski if (nfp_prog->error) 27721c03e03fSJakub Kicinski return nfp_prog->error; 27731c03e03fSJakub Kicinski 2774d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 2775d9ae7f2bSJakub Kicinski } 2776d9ae7f2bSJakub Kicinski 2777d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 2778d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 2779d9ae7f2bSJakub Kicinski { 2780d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2781d9ae7f2bSJakub Kicinski 2782d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2783d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 2784d9ae7f2bSJakub Kicinski 2785d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 2786d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 2787d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 2788d9ae7f2bSJakub Kicinski continue; 2789d9ae7f2bSJakub Kicinski 2790d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 2791d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 2792d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 2793d9ae7f2bSJakub Kicinski meta->skip = true; 2794d9ae7f2bSJakub Kicinski 2795d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 2796d9ae7f2bSJakub Kicinski if (!meta->skip) 2797d9ae7f2bSJakub Kicinski return; 2798d9ae7f2bSJakub Kicinski } 2799d9ae7f2bSJakub Kicinski } 2800d9ae7f2bSJakub Kicinski 28016c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 28026c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 28036c59500cSJakub Kicinski */ 28046c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 28056c59500cSJakub Kicinski { 28066c59500cSJakub Kicinski struct nfp_insn_meta *meta; 28076c59500cSJakub Kicinski 28086c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 28096c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 28106c59500cSJakub Kicinski 28116c59500cSJakub Kicinski if (meta->skip) 28126c59500cSJakub Kicinski continue; 28136c59500cSJakub Kicinski 28146c59500cSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_ALU && 28157bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_ALU64 && 28167bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_JMP) 28176c59500cSJakub Kicinski continue; 28186c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 28196c59500cSJakub Kicinski continue; 28206c59500cSJakub Kicinski if (insn.imm >= 0) 28216c59500cSJakub Kicinski continue; 28226c59500cSJakub Kicinski 28237bdc97beSJakub Kicinski if (BPF_CLASS(insn.code) == BPF_JMP) { 28247bdc97beSJakub Kicinski switch (BPF_OP(insn.code)) { 28257bdc97beSJakub Kicinski case BPF_JGE: 28267bdc97beSJakub Kicinski case BPF_JSGE: 28277bdc97beSJakub Kicinski case BPF_JLT: 28287bdc97beSJakub Kicinski case BPF_JSLT: 28297bdc97beSJakub Kicinski meta->jump_neg_op = true; 28307bdc97beSJakub Kicinski break; 28317bdc97beSJakub Kicinski default: 28327bdc97beSJakub Kicinski continue; 28337bdc97beSJakub Kicinski } 28347bdc97beSJakub Kicinski } else { 28356c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 28366c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 28376c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 28386c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 28396c59500cSJakub Kicinski else 28406c59500cSJakub Kicinski continue; 28416c59500cSJakub Kicinski 28426c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 28437bdc97beSJakub Kicinski } 28446c59500cSJakub Kicinski 28456c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 28466c59500cSJakub Kicinski } 28476c59500cSJakub Kicinski } 28486c59500cSJakub Kicinski 2849d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 2850d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 2851d9ae7f2bSJakub Kicinski { 2852d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 2853d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 2854d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 2855d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 2856d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 2857d9ae7f2bSJakub Kicinski }; 2858d9ae7f2bSJakub Kicinski 2859d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 2860d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 2861d9ae7f2bSJakub Kicinski 2862d9ae7f2bSJakub Kicinski insn = meta1->insn; 2863d9ae7f2bSJakub Kicinski next = meta2->insn; 2864d9ae7f2bSJakub Kicinski 2865d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2866d9ae7f2bSJakub Kicinski continue; 2867d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2868d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2869d9ae7f2bSJakub Kicinski continue; 2870d9ae7f2bSJakub Kicinski 2871d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 2872d9ae7f2bSJakub Kicinski continue; 2873d9ae7f2bSJakub Kicinski 2874d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 2875d9ae7f2bSJakub Kicinski continue; 2876d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 2877d9ae7f2bSJakub Kicinski continue; 2878d9ae7f2bSJakub Kicinski 2879d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 2880d9ae7f2bSJakub Kicinski continue; 2881d9ae7f2bSJakub Kicinski 28821266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 28831266f5d6SJiong Wang continue; 28841266f5d6SJiong Wang 2885d9ae7f2bSJakub Kicinski meta2->skip = true; 2886d9ae7f2bSJakub Kicinski } 2887d9ae7f2bSJakub Kicinski } 2888d9ae7f2bSJakub Kicinski 2889d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 2890d9ae7f2bSJakub Kicinski { 2891d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 2892d9ae7f2bSJakub Kicinski 2893d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 2894d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 2895d9ae7f2bSJakub Kicinski 2896d9ae7f2bSJakub Kicinski insn = meta1->insn; 2897d9ae7f2bSJakub Kicinski next1 = meta2->insn; 2898d9ae7f2bSJakub Kicinski next2 = meta3->insn; 2899d9ae7f2bSJakub Kicinski 2900d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 2901d9ae7f2bSJakub Kicinski continue; 2902d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 2903d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 2904d9ae7f2bSJakub Kicinski continue; 2905d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 2906d9ae7f2bSJakub Kicinski continue; 2907d9ae7f2bSJakub Kicinski 2908d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 2909d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 2910d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 2911d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 2912d9ae7f2bSJakub Kicinski continue; 2913d9ae7f2bSJakub Kicinski 2914d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 2915d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 2916d9ae7f2bSJakub Kicinski continue; 2917d9ae7f2bSJakub Kicinski 2918d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 2919d9ae7f2bSJakub Kicinski continue; 2920d9ae7f2bSJakub Kicinski 292129fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 292229fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 292329fe46efSJiong Wang continue; 292429fe46efSJiong Wang 2925d9ae7f2bSJakub Kicinski meta2->skip = true; 2926d9ae7f2bSJakub Kicinski meta3->skip = true; 2927d9ae7f2bSJakub Kicinski } 2928d9ae7f2bSJakub Kicinski } 2929d9ae7f2bSJakub Kicinski 29306bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 29316bc7103cSJiong Wang * 29326bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 29336bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 29346bc7103cSJiong Wang * 29356bc7103cSJiong Wang * The destination register of load and source register of store should 29366bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 29376bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 29386bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 29396bc7103cSJiong Wang */ 29406bc7103cSJiong Wang static bool 29416bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 29426bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 29436bc7103cSJiong Wang { 29446bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 29456bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 29466bc7103cSJiong Wang 29476bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 29486bc7103cSJiong Wang return false; 29496bc7103cSJiong Wang 29506bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 29516bc7103cSJiong Wang return false; 29526bc7103cSJiong Wang 29536bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 29546bc7103cSJiong Wang return false; 29556bc7103cSJiong Wang 29566bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 29576bc7103cSJiong Wang return false; 29586bc7103cSJiong Wang 29596bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 29606bc7103cSJiong Wang return false; 29616bc7103cSJiong Wang 29626bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 29636bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 29646bc7103cSJiong Wang return false; 29656bc7103cSJiong Wang 29666bc7103cSJiong Wang return true; 29676bc7103cSJiong Wang } 29686bc7103cSJiong Wang 29696bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 29706bc7103cSJiong Wang * 29716bc7103cSJiong Wang * - Their address base registers are the same. 29726bc7103cSJiong Wang * - Their address offsets are in the same order. 29736bc7103cSJiong Wang * - They operate at the same memory width. 29746bc7103cSJiong Wang * - There is no jump into the middle of them. 29756bc7103cSJiong Wang */ 29766bc7103cSJiong Wang static bool 29776bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 29786bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 29796bc7103cSJiong Wang struct bpf_insn *prev_ld, 29806bc7103cSJiong Wang struct bpf_insn *prev_st) 29816bc7103cSJiong Wang { 29826bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 29836bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 29846bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 29856bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 29866bc7103cSJiong Wang 29876bc7103cSJiong Wang /* This pair is the start pair. */ 29886bc7103cSJiong Wang if (!prev_ld) 29896bc7103cSJiong Wang return true; 29906bc7103cSJiong Wang 29916bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 29926bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 29936bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 29946bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 29956bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 29966bc7103cSJiong Wang prev_ld_off = prev_ld->off; 29976bc7103cSJiong Wang prev_st_off = prev_st->off; 29986bc7103cSJiong Wang 29996bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 30006bc7103cSJiong Wang return false; 30016bc7103cSJiong Wang 30026bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 30036bc7103cSJiong Wang return false; 30046bc7103cSJiong Wang 30056bc7103cSJiong Wang if (curr_size != prev_size) 30066bc7103cSJiong Wang return false; 30076bc7103cSJiong Wang 30086bc7103cSJiong Wang /* There is jump to the head of this pair. */ 30096bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 30106bc7103cSJiong Wang return false; 30116bc7103cSJiong Wang 30126bc7103cSJiong Wang /* Both in ascending order. */ 30136bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 30146bc7103cSJiong Wang prev_st_off + prev_size == st->off) 30156bc7103cSJiong Wang return true; 30166bc7103cSJiong Wang 30176bc7103cSJiong Wang /* Both in descending order. */ 30186bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 30196bc7103cSJiong Wang st->off + curr_size == prev_st_off) 30206bc7103cSJiong Wang return true; 30216bc7103cSJiong Wang 30226bc7103cSJiong Wang return false; 30236bc7103cSJiong Wang } 30246bc7103cSJiong Wang 30256bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 30266bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 30276bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 30286bc7103cSJiong Wang * as an memory copy. 30296bc7103cSJiong Wang */ 30306bc7103cSJiong Wang static bool 30316bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 30326bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 30336bc7103cSJiong Wang { 30346bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 30356bc7103cSJiong Wang 30366bc7103cSJiong Wang /* Different pointer types does not overlap. */ 30376bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 30386bc7103cSJiong Wang return false; 30396bc7103cSJiong Wang 30406bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 30416bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 30426bc7103cSJiong Wang return true; 30436bc7103cSJiong Wang 30446bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 30456bc7103cSJiong Wang * base register. 30466bc7103cSJiong Wang */ 30476bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 30486bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 30496bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 30506bc7103cSJiong Wang 30516bc7103cSJiong Wang /* Ascending order cross. */ 30526bc7103cSJiong Wang if (ld_off > head_ld_off && 30536bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 30546bc7103cSJiong Wang return true; 30556bc7103cSJiong Wang 30566bc7103cSJiong Wang /* Descending order cross. */ 30576bc7103cSJiong Wang if (ld_off < head_ld_off && 30586bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 30596bc7103cSJiong Wang return true; 30606bc7103cSJiong Wang 30616bc7103cSJiong Wang return false; 30626bc7103cSJiong Wang } 30636bc7103cSJiong Wang 30646bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 30656bc7103cSJiong Wang * 30666bc7103cSJiong Wang * load R, [regA + offA] 30676bc7103cSJiong Wang * store [regB + offB], R 30686bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 30696bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 30706bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 30716bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 30726bc7103cSJiong Wang * ... 30736bc7103cSJiong Wang * 30746bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 30756bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 30766bc7103cSJiong Wang */ 30776bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 30786bc7103cSJiong Wang { 30796bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 30806bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 30816bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 30826bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 30836bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 30846bc7103cSJiong Wang u8 count = 0; 30856bc7103cSJiong Wang 30866bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 30876bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 30886bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 30896bc7103cSJiong Wang 30906bc7103cSJiong Wang /* Reset record status if any of the following if true: 30916bc7103cSJiong Wang * - The current insn pair is not load/store. 30926bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 30936bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 30946bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 30956bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 30966bc7103cSJiong Wang * single NFP CPP command can transfer. 30976bc7103cSJiong Wang */ 30986bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 30996bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 31006bc7103cSJiong Wang prev_st) || 31016bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 31026bc7103cSJiong Wang head_st_meta) || 31036bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 31046bc7103cSJiong Wang if (!count) 31056bc7103cSJiong Wang continue; 31066bc7103cSJiong Wang 31076bc7103cSJiong Wang if (count > 1) { 31086bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 31096bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 31106bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 31116bc7103cSJiong Wang 31126bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 31136bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 31146bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 31156bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 31166bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 31176bc7103cSJiong Wang } 31186bc7103cSJiong Wang 31196bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 31206bc7103cSJiong Wang head_st_meta->skip = true; 31216bc7103cSJiong Wang } else { 31226bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 31236bc7103cSJiong Wang } 31246bc7103cSJiong Wang 31256bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 31266bc7103cSJiong Wang * could serve as the new head of the the next chain. 31276bc7103cSJiong Wang */ 31286bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 31296bc7103cSJiong Wang head_ld_meta = meta1; 31306bc7103cSJiong Wang head_st_meta = meta2; 31316bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 31326bc7103cSJiong Wang BPF_LDST_BYTES(ld); 31336bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 31346bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 31356bc7103cSJiong Wang prev_ld = ld; 31366bc7103cSJiong Wang prev_st = st; 31376bc7103cSJiong Wang count = 1; 31386bc7103cSJiong Wang } else { 31396bc7103cSJiong Wang head_ld_meta = NULL; 31406bc7103cSJiong Wang head_st_meta = NULL; 31416bc7103cSJiong Wang prev_ld = NULL; 31426bc7103cSJiong Wang prev_st = NULL; 31436bc7103cSJiong Wang count = 0; 31446bc7103cSJiong Wang } 31456bc7103cSJiong Wang 31466bc7103cSJiong Wang continue; 31476bc7103cSJiong Wang } 31486bc7103cSJiong Wang 31496bc7103cSJiong Wang if (!head_ld_meta) { 31506bc7103cSJiong Wang head_ld_meta = meta1; 31516bc7103cSJiong Wang head_st_meta = meta2; 31526bc7103cSJiong Wang } else { 31536bc7103cSJiong Wang meta1->skip = true; 31546bc7103cSJiong Wang meta2->skip = true; 31556bc7103cSJiong Wang } 31566bc7103cSJiong Wang 31576bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 31586bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 31596bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 31606bc7103cSJiong Wang prev_ld = ld; 31616bc7103cSJiong Wang prev_st = st; 31626bc7103cSJiong Wang count++; 31636bc7103cSJiong Wang } 31646bc7103cSJiong Wang } 31656bc7103cSJiong Wang 316687b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 316787b10ecdSJiong Wang { 316887b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 316987b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 317087b10ecdSJiong Wang bool cache_avail = false; 317187b10ecdSJiong Wang struct bpf_insn *insn; 317287b10ecdSJiong Wang s32 range_ptr_off = 0; 317387b10ecdSJiong Wang u32 range_ptr_id = 0; 317487b10ecdSJiong Wang 317587b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 317687b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 317787b10ecdSJiong Wang cache_avail = false; 317887b10ecdSJiong Wang 317987b10ecdSJiong Wang if (meta->skip) 318087b10ecdSJiong Wang continue; 318187b10ecdSJiong Wang 318287b10ecdSJiong Wang insn = &meta->insn; 318387b10ecdSJiong Wang 318487b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 318587b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 318687b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 318787b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 318887b10ecdSJiong Wang cache_avail = false; 318987b10ecdSJiong Wang continue; 319087b10ecdSJiong Wang } 319187b10ecdSJiong Wang 319287b10ecdSJiong Wang if (!is_mbpf_load(meta)) 319387b10ecdSJiong Wang continue; 319487b10ecdSJiong Wang 319587b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 319687b10ecdSJiong Wang cache_avail = false; 319787b10ecdSJiong Wang continue; 319887b10ecdSJiong Wang } 319987b10ecdSJiong Wang 320087b10ecdSJiong Wang if (!cache_avail) { 320187b10ecdSJiong Wang cache_avail = true; 320287b10ecdSJiong Wang if (range_node) 320387b10ecdSJiong Wang goto end_current_then_start_new; 320487b10ecdSJiong Wang goto start_new; 320587b10ecdSJiong Wang } 320687b10ecdSJiong Wang 320787b10ecdSJiong Wang /* Check ID to make sure two reads share the same 320887b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 320987b10ecdSJiong Wang * to make sure they also share the same constant 321087b10ecdSJiong Wang * offset. 321187b10ecdSJiong Wang * 321287b10ecdSJiong Wang * OFFs don't really need to be the same, because they 321387b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 321487b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 321587b10ecdSJiong Wang * offsets against original packet pointer. We don't 321687b10ecdSJiong Wang * support this. 321787b10ecdSJiong Wang */ 321887b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 321987b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 322087b10ecdSJiong Wang s16 new_start = range_start; 322187b10ecdSJiong Wang s16 end, off = insn->off; 322287b10ecdSJiong Wang s16 new_end = range_end; 322387b10ecdSJiong Wang bool changed = false; 322487b10ecdSJiong Wang 322587b10ecdSJiong Wang if (off < range_start) { 322687b10ecdSJiong Wang new_start = off; 322787b10ecdSJiong Wang changed = true; 322887b10ecdSJiong Wang } 322987b10ecdSJiong Wang 323087b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 323187b10ecdSJiong Wang if (end > range_end) { 323287b10ecdSJiong Wang new_end = end; 323387b10ecdSJiong Wang changed = true; 323487b10ecdSJiong Wang } 323587b10ecdSJiong Wang 323687b10ecdSJiong Wang if (!changed) 323787b10ecdSJiong Wang continue; 323887b10ecdSJiong Wang 323987b10ecdSJiong Wang if (new_end - new_start <= 64) { 324087b10ecdSJiong Wang /* Install new range. */ 324187b10ecdSJiong Wang range_start = new_start; 324287b10ecdSJiong Wang range_end = new_end; 324387b10ecdSJiong Wang continue; 324487b10ecdSJiong Wang } 324587b10ecdSJiong Wang } 324687b10ecdSJiong Wang 324787b10ecdSJiong Wang end_current_then_start_new: 324887b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 324987b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 325087b10ecdSJiong Wang start_new: 325187b10ecdSJiong Wang range_node = meta; 325287b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 325387b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 325487b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 325587b10ecdSJiong Wang range_start = insn->off; 325687b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 325787b10ecdSJiong Wang } 325887b10ecdSJiong Wang 325987b10ecdSJiong Wang if (range_node) { 326087b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 326187b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 326287b10ecdSJiong Wang } 326387b10ecdSJiong Wang 326487b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 326587b10ecdSJiong Wang if (meta->skip) 326687b10ecdSJiong Wang continue; 326787b10ecdSJiong Wang 326887b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 326987b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 327087b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 327187b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 327287b10ecdSJiong Wang } else { 327387b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 327487b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 327587b10ecdSJiong Wang } 327687b10ecdSJiong Wang } 327787b10ecdSJiong Wang } 327887b10ecdSJiong Wang } 327987b10ecdSJiong Wang 3280d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 3281d9ae7f2bSJakub Kicinski { 3282d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 3283d9ae7f2bSJakub Kicinski 32846c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 3285d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 3286d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 32876bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 328887b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 3289d9ae7f2bSJakub Kicinski 3290d9ae7f2bSJakub Kicinski return 0; 3291d9ae7f2bSJakub Kicinski } 3292d9ae7f2bSJakub Kicinski 3293b4264c96SJakub Kicinski static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) 3294b4264c96SJakub Kicinski { 3295b4264c96SJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3296b4264c96SJakub Kicinski struct nfp_bpf_map *nfp_map; 3297b4264c96SJakub Kicinski struct bpf_map *map; 3298b4264c96SJakub Kicinski 3299b4264c96SJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3300b4264c96SJakub Kicinski if (meta1->skip || meta2->skip) 3301b4264c96SJakub Kicinski continue; 3302b4264c96SJakub Kicinski 3303b4264c96SJakub Kicinski if (meta1->insn.code != (BPF_LD | BPF_IMM | BPF_DW) || 3304b4264c96SJakub Kicinski meta1->insn.src_reg != BPF_PSEUDO_MAP_FD) 3305b4264c96SJakub Kicinski continue; 3306b4264c96SJakub Kicinski 3307b4264c96SJakub Kicinski map = (void *)(unsigned long)((u32)meta1->insn.imm | 3308b4264c96SJakub Kicinski (u64)meta2->insn.imm << 32); 3309b4264c96SJakub Kicinski if (bpf_map_offload_neutral(map)) 3310b4264c96SJakub Kicinski continue; 3311b4264c96SJakub Kicinski nfp_map = map_to_offmap(map)->dev_priv; 3312b4264c96SJakub Kicinski 3313b4264c96SJakub Kicinski meta1->insn.imm = nfp_map->tid; 3314b4264c96SJakub Kicinski meta2->insn.imm = 0; 3315b4264c96SJakub Kicinski } 3316b4264c96SJakub Kicinski 3317b4264c96SJakub Kicinski return 0; 3318b4264c96SJakub Kicinski } 3319b4264c96SJakub Kicinski 33202314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 3321fd068ddcSJakub Kicinski { 33222314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 3323fd068ddcSJakub Kicinski int i; 3324fd068ddcSJakub Kicinski 33252314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 3326fd068ddcSJakub Kicinski int err; 3327fd068ddcSJakub Kicinski 33282314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 3329fd068ddcSJakub Kicinski if (err) 3330fd068ddcSJakub Kicinski return err; 3331fd068ddcSJakub Kicinski 33322314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 3333fd068ddcSJakub Kicinski } 3334fd068ddcSJakub Kicinski 3335fd068ddcSJakub Kicinski return 0; 3336fd068ddcSJakub Kicinski } 3337fd068ddcSJakub Kicinski 333844a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 333944a12eccSJakub Kicinski { 334044a12eccSJakub Kicinski void *prog; 334144a12eccSJakub Kicinski 334244a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 334344a12eccSJakub Kicinski if (!prog) 334444a12eccSJakub Kicinski return; 334544a12eccSJakub Kicinski 334644a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 334744a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 334844a12eccSJakub Kicinski kvfree(nfp_prog->prog); 334944a12eccSJakub Kicinski nfp_prog->prog = prog; 335044a12eccSJakub Kicinski } 335144a12eccSJakub Kicinski 3352c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3353d9ae7f2bSJakub Kicinski { 3354d9ae7f2bSJakub Kicinski int ret; 3355d9ae7f2bSJakub Kicinski 3356b4264c96SJakub Kicinski ret = nfp_bpf_replace_map_ptrs(nfp_prog); 3357b4264c96SJakub Kicinski if (ret) 3358b4264c96SJakub Kicinski return ret; 3359b4264c96SJakub Kicinski 3360d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 3361d9ae7f2bSJakub Kicinski if (ret) 33629314c442SJakub Kicinski return ret; 3363d9ae7f2bSJakub Kicinski 3364d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 3365d9ae7f2bSJakub Kicinski if (ret) { 3366d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 3367d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 33689314c442SJakub Kicinski return -EINVAL; 3369d9ae7f2bSJakub Kicinski } 3370d9ae7f2bSJakub Kicinski 337144a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 337244a12eccSJakub Kicinski 33732314fe9eSJakub Kicinski return ret; 3374d9ae7f2bSJakub Kicinski } 33751549921dSJakub Kicinski 33761549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 33771549921dSJakub Kicinski { 33781549921dSJakub Kicinski struct nfp_insn_meta *meta; 33791549921dSJakub Kicinski 33801549921dSJakub Kicinski /* Another pass to record jump information. */ 33811549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 33821549921dSJakub Kicinski u64 code = meta->insn.code; 33831549921dSJakub Kicinski 33841549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 33851549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 33861549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 33871549921dSJakub Kicinski unsigned short dst_indx; 33881549921dSJakub Kicinski 33891549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 33901549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 33911549921dSJakub Kicinski cnt); 33921549921dSJakub Kicinski 33931549921dSJakub Kicinski meta->jmp_dst = dst_meta; 33941549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 33951549921dSJakub Kicinski } 33961549921dSJakub Kicinski } 33971549921dSJakub Kicinski } 33982314fe9eSJakub Kicinski 339974801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 340074801e50SQuentin Monnet { 340174801e50SQuentin Monnet return !!instr_cb[code]; 340274801e50SQuentin Monnet } 340374801e50SQuentin Monnet 34042314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 34052314fe9eSJakub Kicinski { 34062314fe9eSJakub Kicinski unsigned int i; 34072314fe9eSJakub Kicinski u64 *prog; 34082314fe9eSJakub Kicinski int err; 34092314fe9eSJakub Kicinski 34102314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 34112314fe9eSJakub Kicinski GFP_KERNEL); 34122314fe9eSJakub Kicinski if (!prog) 34132314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 34142314fe9eSJakub Kicinski 34152314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 34162314fe9eSJakub Kicinski enum nfp_relo_type special; 341777a3d311SJakub Kicinski u32 val; 34182314fe9eSJakub Kicinski 34192314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 34202314fe9eSJakub Kicinski switch (special) { 34212314fe9eSJakub Kicinski case RELO_NONE: 34222314fe9eSJakub Kicinski continue; 34232314fe9eSJakub Kicinski case RELO_BR_REL: 34242314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 34252314fe9eSJakub Kicinski break; 34262314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 34272314fe9eSJakub Kicinski br_set_offset(&prog[i], 34282314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 34292314fe9eSJakub Kicinski break; 34302314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 34312314fe9eSJakub Kicinski br_set_offset(&prog[i], 34322314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 34332314fe9eSJakub Kicinski break; 34342314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 34352314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 34362314fe9eSJakub Kicinski break; 343777a3d311SJakub Kicinski case RELO_BR_HELPER: 343877a3d311SJakub Kicinski val = br_get_offset(prog[i]); 343977a3d311SJakub Kicinski val -= BR_OFF_RELO; 344077a3d311SJakub Kicinski switch (val) { 344177a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 344277a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 344377a3d311SJakub Kicinski break; 344444d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 344544d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 344644d65a47SJakub Kicinski break; 3447bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3448bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 3449bfee64deSJakub Kicinski break; 34509816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 34519816dd35SJakub Kicinski val = nfp_prog->bpf->helpers.perf_event_output; 34529816dd35SJakub Kicinski break; 345377a3d311SJakub Kicinski default: 345477a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 345577a3d311SJakub Kicinski val); 345677a3d311SJakub Kicinski err = -EINVAL; 345777a3d311SJakub Kicinski goto err_free_prog; 345877a3d311SJakub Kicinski } 345977a3d311SJakub Kicinski br_set_offset(&prog[i], val); 346077a3d311SJakub Kicinski break; 346177a3d311SJakub Kicinski case RELO_IMMED_REL: 346277a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 346377a3d311SJakub Kicinski break; 34642314fe9eSJakub Kicinski } 34652314fe9eSJakub Kicinski 34662314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 34672314fe9eSJakub Kicinski } 34682314fe9eSJakub Kicinski 34692314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 34702314fe9eSJakub Kicinski if (err) 34712314fe9eSJakub Kicinski goto err_free_prog; 34722314fe9eSJakub Kicinski 34732314fe9eSJakub Kicinski return prog; 34742314fe9eSJakub Kicinski 34752314fe9eSJakub Kicinski err_free_prog: 34762314fe9eSJakub Kicinski kfree(prog); 34772314fe9eSJakub Kicinski return ERR_PTR(err); 34782314fe9eSJakub Kicinski } 3479