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 215991f5b36SJiong Wang __emit_br_bit(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 addr, u8 defer, 216991f5b36SJiong Wang bool set, bool src_lmextn) 217991f5b36SJiong Wang { 218991f5b36SJiong Wang u16 addr_lo, addr_hi; 219991f5b36SJiong Wang u64 insn; 220991f5b36SJiong Wang 221991f5b36SJiong Wang addr_lo = addr & (OP_BR_BIT_ADDR_LO >> __bf_shf(OP_BR_BIT_ADDR_LO)); 222991f5b36SJiong Wang addr_hi = addr != addr_lo; 223991f5b36SJiong Wang 224991f5b36SJiong Wang insn = OP_BR_BIT_BASE | 225991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_A_SRC, areg) | 226991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_B_SRC, breg) | 227991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_BV, set) | 228991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_DEFBR, defer) | 229991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_ADDR_LO, addr_lo) | 230991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_ADDR_HI, addr_hi) | 231991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_SRC_LMEXTN, src_lmextn); 232991f5b36SJiong Wang 233991f5b36SJiong Wang nfp_prog_push(nfp_prog, insn); 234991f5b36SJiong Wang } 235991f5b36SJiong Wang 236991f5b36SJiong Wang static void 237991f5b36SJiong Wang emit_br_bit_relo(struct nfp_prog *nfp_prog, swreg src, u8 bit, u16 addr, 238991f5b36SJiong Wang u8 defer, bool set, enum nfp_relo_type relo) 239991f5b36SJiong Wang { 240991f5b36SJiong Wang struct nfp_insn_re_regs reg; 241991f5b36SJiong Wang int err; 242991f5b36SJiong Wang 243991f5b36SJiong Wang /* NOTE: The bit to test is specified as an rotation amount, such that 244991f5b36SJiong Wang * the bit to test will be placed on the MSB of the result when 245991f5b36SJiong Wang * doing a rotate right. For bit X, we need right rotate X + 1. 246991f5b36SJiong Wang */ 247991f5b36SJiong Wang bit += 1; 248991f5b36SJiong Wang 249991f5b36SJiong Wang err = swreg_to_restricted(reg_none(), src, reg_imm(bit), ®, false); 250991f5b36SJiong Wang if (err) { 251991f5b36SJiong Wang nfp_prog->error = err; 252991f5b36SJiong Wang return; 253991f5b36SJiong Wang } 254991f5b36SJiong Wang 255991f5b36SJiong Wang __emit_br_bit(nfp_prog, reg.areg, reg.breg, addr, defer, set, 256991f5b36SJiong Wang reg.src_lmextn); 257991f5b36SJiong Wang 258991f5b36SJiong Wang nfp_prog->prog[nfp_prog->prog_len - 1] |= 259991f5b36SJiong Wang FIELD_PREP(OP_RELO_TYPE, relo); 260991f5b36SJiong Wang } 261991f5b36SJiong Wang 262991f5b36SJiong Wang static void 263991f5b36SJiong Wang emit_br_bset(struct nfp_prog *nfp_prog, swreg src, u8 bit, u16 addr, u8 defer) 264991f5b36SJiong Wang { 265991f5b36SJiong Wang emit_br_bit_relo(nfp_prog, src, bit, addr, defer, true, RELO_BR_REL); 266991f5b36SJiong Wang } 267991f5b36SJiong Wang 268991f5b36SJiong Wang static void 269d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 270d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 271995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 272995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 273d9ae7f2bSJakub Kicinski { 274d9ae7f2bSJakub Kicinski u64 insn; 275d9ae7f2bSJakub Kicinski 276d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 277d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 278d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 279d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 280d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 281d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 283995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 284995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 285995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 286d9ae7f2bSJakub Kicinski 287d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 288d9ae7f2bSJakub Kicinski } 289d9ae7f2bSJakub Kicinski 290d9ae7f2bSJakub Kicinski static void 291b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 292d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 293d9ae7f2bSJakub Kicinski { 294d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 295d9ae7f2bSJakub Kicinski int err; 296d9ae7f2bSJakub Kicinski 297b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 298d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 299d9ae7f2bSJakub Kicinski return; 300d9ae7f2bSJakub Kicinski } 301d9ae7f2bSJakub Kicinski 302d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 303d9ae7f2bSJakub Kicinski if (err) { 304d9ae7f2bSJakub Kicinski nfp_prog->error = err; 305d9ae7f2bSJakub Kicinski return; 306d9ae7f2bSJakub Kicinski } 307d9ae7f2bSJakub Kicinski 3083239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 3093239e7bbSJiong Wang __emit_immed(nfp_prog, 3103239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 3113239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 3123239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 313d9ae7f2bSJakub Kicinski } 314d9ae7f2bSJakub Kicinski 315d9ae7f2bSJakub Kicinski static void 316d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 317d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 318995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 319995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 320d9ae7f2bSJakub Kicinski { 321d9ae7f2bSJakub Kicinski u64 insn; 322d9ae7f2bSJakub Kicinski 323d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 324d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 325d9ae7f2bSJakub Kicinski return; 326d9ae7f2bSJakub Kicinski } 327d9ae7f2bSJakub Kicinski 328d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 329d9ae7f2bSJakub Kicinski shift = 32 - shift; 330d9ae7f2bSJakub Kicinski 331d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 332d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 333d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 334d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 335d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 336d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 337d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 338d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 339d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 340d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 341995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 342995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 343995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 344d9ae7f2bSJakub Kicinski 345d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 346d9ae7f2bSJakub Kicinski } 347d9ae7f2bSJakub Kicinski 348d9ae7f2bSJakub Kicinski static void 349b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 350b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 351d9ae7f2bSJakub Kicinski { 352d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 353d9ae7f2bSJakub Kicinski int err; 354d9ae7f2bSJakub Kicinski 355d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 356d9ae7f2bSJakub Kicinski if (err) { 357d9ae7f2bSJakub Kicinski nfp_prog->error = err; 358d9ae7f2bSJakub Kicinski return; 359d9ae7f2bSJakub Kicinski } 360d9ae7f2bSJakub Kicinski 361d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 362995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 363995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 364d9ae7f2bSJakub Kicinski } 365d9ae7f2bSJakub Kicinski 366d9ae7f2bSJakub Kicinski static void 367991f5b36SJiong Wang emit_shf_indir(struct nfp_prog *nfp_prog, swreg dst, 368991f5b36SJiong Wang swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc) 369991f5b36SJiong Wang { 370991f5b36SJiong Wang if (sc == SHF_SC_R_ROT) { 371991f5b36SJiong Wang pr_err("indirect shift is not allowed on rotation\n"); 372991f5b36SJiong Wang nfp_prog->error = -EFAULT; 373991f5b36SJiong Wang return; 374991f5b36SJiong Wang } 375991f5b36SJiong Wang 376991f5b36SJiong Wang emit_shf(nfp_prog, dst, lreg, op, rreg, sc, 0); 377991f5b36SJiong Wang } 378991f5b36SJiong Wang 379991f5b36SJiong Wang static void 380d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 381995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 382995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 383d9ae7f2bSJakub Kicinski { 384d9ae7f2bSJakub Kicinski u64 insn; 385d9ae7f2bSJakub Kicinski 386d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 387d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 388d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 389d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 390d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 391d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 392d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 393995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 394995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 395995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 396d9ae7f2bSJakub Kicinski 397d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 398d9ae7f2bSJakub Kicinski } 399d9ae7f2bSJakub Kicinski 400d9ae7f2bSJakub Kicinski static void 401b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 402b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 403d9ae7f2bSJakub Kicinski { 404d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 405d9ae7f2bSJakub Kicinski int err; 406d9ae7f2bSJakub Kicinski 407d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 408d9ae7f2bSJakub Kicinski if (err) { 409d9ae7f2bSJakub Kicinski nfp_prog->error = err; 410d9ae7f2bSJakub Kicinski return; 411d9ae7f2bSJakub Kicinski } 412d9ae7f2bSJakub Kicinski 413d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 414995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 415995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 416d9ae7f2bSJakub Kicinski } 417d9ae7f2bSJakub Kicinski 418d9ae7f2bSJakub Kicinski static void 419d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 420d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 421995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 422995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 423d9ae7f2bSJakub Kicinski { 424d9ae7f2bSJakub Kicinski u64 insn; 425d9ae7f2bSJakub Kicinski 426d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 427d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 428d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 429d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 430d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 431d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 432d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 433d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 434d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 435995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 436995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 437995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 438d9ae7f2bSJakub Kicinski 439d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 440d9ae7f2bSJakub Kicinski } 441d9ae7f2bSJakub Kicinski 442d9ae7f2bSJakub Kicinski static void 443bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 444bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 445d9ae7f2bSJakub Kicinski { 446d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 447d9ae7f2bSJakub Kicinski int err; 448d9ae7f2bSJakub Kicinski 4492de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 4502de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 451d9ae7f2bSJakub Kicinski if (err) { 452d9ae7f2bSJakub Kicinski nfp_prog->error = err; 453d9ae7f2bSJakub Kicinski return; 454d9ae7f2bSJakub Kicinski } 455d9ae7f2bSJakub Kicinski 456d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 457995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 458995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 459d9ae7f2bSJakub Kicinski } 460d9ae7f2bSJakub Kicinski 461d9ae7f2bSJakub Kicinski static void 462b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 463d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 464d9ae7f2bSJakub Kicinski { 465bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 466d9ae7f2bSJakub Kicinski } 467d9ae7f2bSJakub Kicinski 4682df03a50SJakub Kicinski static void 4692df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 4702df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 4712df03a50SJakub Kicinski { 4722df03a50SJakub Kicinski u64 insn; 4732df03a50SJakub Kicinski 4742df03a50SJakub Kicinski insn = OP_LCSR_BASE | 4752df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 4762df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 4772df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 478df4a37d8SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr / 4) | 4792df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 4802df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 4812df03a50SJakub Kicinski 4822df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 4832df03a50SJakub Kicinski } 4842df03a50SJakub Kicinski 4852df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 4862df03a50SJakub Kicinski { 4872df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 4882df03a50SJakub Kicinski int err; 4892df03a50SJakub Kicinski 4902df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 4912df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 4922df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 4932df03a50SJakub Kicinski * copy the immed to both operands. 4942df03a50SJakub Kicinski */ 4952df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 4962df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 4972df03a50SJakub Kicinski reg.breg = reg.areg; 4982df03a50SJakub Kicinski } else { 4992df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 5002df03a50SJakub Kicinski } 5012df03a50SJakub Kicinski if (err) { 5022df03a50SJakub Kicinski nfp_prog->error = err; 5032df03a50SJakub Kicinski return; 5042df03a50SJakub Kicinski } 5052df03a50SJakub Kicinski 506df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr, 5072df03a50SJakub Kicinski false, reg.src_lmextn); 5082df03a50SJakub Kicinski } 5092df03a50SJakub Kicinski 510df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 511df4a37d8SJakub Kicinski static void __emit_csr_rd(struct nfp_prog *nfp_prog, u16 addr) 512df4a37d8SJakub Kicinski { 513df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, 0, 0, false, addr, false, false); 514df4a37d8SJakub Kicinski } 515df4a37d8SJakub Kicinski 5161c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 5171c03e03fSJakub Kicinski { 5181c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 5191c03e03fSJakub Kicinski } 5201c03e03fSJakub Kicinski 521d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 522d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 523d9ae7f2bSJakub Kicinski { 524d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 525d9ae7f2bSJakub Kicinski *val = imm; 526d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 527d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 528d9ae7f2bSJakub Kicinski *val = imm >> 8; 529d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 530d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 531d9ae7f2bSJakub Kicinski *val = imm >> 16; 532d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 533d9ae7f2bSJakub Kicinski } else { 534d9ae7f2bSJakub Kicinski return false; 535d9ae7f2bSJakub Kicinski } 536d9ae7f2bSJakub Kicinski 537d9ae7f2bSJakub Kicinski return true; 538d9ae7f2bSJakub Kicinski } 539d9ae7f2bSJakub Kicinski 540b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 541d9ae7f2bSJakub Kicinski { 542d9ae7f2bSJakub Kicinski enum immed_shift shift; 543d9ae7f2bSJakub Kicinski u16 val; 544d9ae7f2bSJakub Kicinski 545d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 546d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 547d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 548d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 549d9ae7f2bSJakub Kicinski } else { 550d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 551d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 552d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 553d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 554d9ae7f2bSJakub Kicinski } 555d9ae7f2bSJakub Kicinski } 556d9ae7f2bSJakub Kicinski 55777a3d311SJakub Kicinski static void 55877a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 55977a3d311SJakub Kicinski enum nfp_relo_type relo) 56077a3d311SJakub Kicinski { 56177a3d311SJakub Kicinski if (imm > 0xffff) { 56277a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 56377a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 56477a3d311SJakub Kicinski return; 56577a3d311SJakub Kicinski } 56677a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 56777a3d311SJakub Kicinski 56877a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 56977a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 57077a3d311SJakub Kicinski } 57177a3d311SJakub Kicinski 572d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 573d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 574d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 575d9ae7f2bSJakub Kicinski */ 576b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 577d9ae7f2bSJakub Kicinski { 578d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 579d9ae7f2bSJakub Kicinski return reg_imm(imm); 580d9ae7f2bSJakub Kicinski 581d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 582d9ae7f2bSJakub Kicinski return tmp_reg; 583d9ae7f2bSJakub Kicinski } 584d9ae7f2bSJakub Kicinski 585d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 586d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 587d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 588d9ae7f2bSJakub Kicinski */ 589b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 590d9ae7f2bSJakub Kicinski { 591d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 592d9ae7f2bSJakub Kicinski return reg_imm(imm); 593d9ae7f2bSJakub Kicinski 594d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 595d9ae7f2bSJakub Kicinski return tmp_reg; 596d9ae7f2bSJakub Kicinski } 597d9ae7f2bSJakub Kicinski 598ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 599ff42bb9fSJakub Kicinski { 600ff42bb9fSJakub Kicinski while (count--) 601ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 602ff42bb9fSJakub Kicinski } 603ff42bb9fSJakub Kicinski 604c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 605c000dfb5SJakub Kicinski { 606c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 607c000dfb5SJakub Kicinski } 608c000dfb5SJakub Kicinski 609d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 610d9ae7f2bSJakub Kicinski { 611c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 612d9ae7f2bSJakub Kicinski } 613d9ae7f2bSJakub Kicinski 6149879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 6159879a381SJiong Wang * result to @dst from low end. 6169879a381SJiong Wang */ 6179879a381SJiong Wang static void 6189879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 6199879a381SJiong Wang u8 offset) 6209879a381SJiong Wang { 6219879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 6229879a381SJiong Wang u8 mask = (1 << field_len) - 1; 6239879a381SJiong Wang 6249879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 6259879a381SJiong Wang } 6269879a381SJiong Wang 62791ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 62891ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 62991ff69e8SJiong Wang */ 63091ff69e8SJiong Wang static void 63191ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 63291ff69e8SJiong Wang u8 field_len, u8 offset) 63391ff69e8SJiong Wang { 63491ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 63591ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 63691ff69e8SJiong Wang 63791ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 63891ff69e8SJiong Wang } 63991ff69e8SJiong Wang 6403dd43c33SJakub Kicinski static void 6413dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 6423dd43c33SJakub Kicinski swreg *rega, swreg *regb) 6433dd43c33SJakub Kicinski { 6443dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 6453dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 6463dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 6473dd43c33SJakub Kicinski return; 6483dd43c33SJakub Kicinski } 6493dd43c33SJakub Kicinski 6503dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 6513dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 6523dd43c33SJakub Kicinski reg_imm(0)); 6533dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 6543dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 6553dd43c33SJakub Kicinski } 6563dd43c33SJakub Kicinski 6579879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 6589879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 6599879a381SJiong Wang { 6609879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 6619879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 6629879a381SJiong Wang swreg src_base, off; 6633dd43c33SJakub Kicinski bool src_40bit_addr; 6649879a381SJiong Wang unsigned int i; 6659879a381SJiong Wang u8 xfer_num; 6669879a381SJiong Wang 6679879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 6683dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 6699879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 6709879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 6719879a381SJiong Wang 6723dd43c33SJakub Kicinski if (src_40bit_addr) 673cc0dff6dSJiong Wang addr40_offset(nfp_prog, meta->insn.src_reg * 2, off, &src_base, 6743dd43c33SJakub Kicinski &off); 6753dd43c33SJakub Kicinski 6768c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 6778c900538SJiong Wang if (len > 32) 6788c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6798c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6808c900538SJiong Wang 6819879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 6823dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 6833dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 684b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 6859879a381SJiong Wang 6869879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 6879879a381SJiong Wang for (i = 0; i < xfer_num; i++) 6889879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 6899879a381SJiong Wang 6909879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 6919879a381SJiong Wang 6929879a381SJiong Wang if (len <= 8) { 6939879a381SJiong Wang /* Use single direct_ref write8. */ 6949879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6959879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 696b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6978c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 6989879a381SJiong Wang /* Use single direct_ref write32. */ 6999879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7009879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 701b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7028c900538SJiong Wang } else if (len <= 32) { 7039879a381SJiong Wang /* Use single indirect_ref write8. */ 7049879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 7059879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 7069879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7079879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 708b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 7098c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 7108c900538SJiong Wang /* Use single indirect_ref write32. */ 7118c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7128c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7138c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7148c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 715b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 7168c900538SJiong Wang } else if (len <= 40) { 7178c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 7188c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 7198c900538SJiong Wang */ 7208c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7218c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 722b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7238c900538SJiong Wang 7248c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 7258c900538SJiong Wang imm_b(nfp_prog)); 7268c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 7278c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 728b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7298c900538SJiong Wang } else { 7308c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 7318c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 7328c900538SJiong Wang */ 7338c900538SJiong Wang u8 new_off; 7348c900538SJiong Wang 7358c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7368c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 7378c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7388c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 739b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 7408c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 7418c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 7428c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 7438c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 744b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 7459879a381SJiong Wang } 7469879a381SJiong Wang 7479879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 7489879a381SJiong Wang * before and after we do memory copy optimization. 7499879a381SJiong Wang * 7509879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 7519879a381SJiong Wang * need to make sure it is loaded with the value the same as before 7529879a381SJiong Wang * this transformation. 7539879a381SJiong Wang * 7549879a381SJiong Wang * These extra loads could be removed once we have accurate register 7559879a381SJiong Wang * usage information. 7569879a381SJiong Wang */ 7579879a381SJiong Wang if (descending_seq) 7589879a381SJiong Wang xfer_num = 0; 7599879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 7609879a381SJiong Wang xfer_num = xfer_num - 1; 7619879a381SJiong Wang else 7629879a381SJiong Wang xfer_num = xfer_num - 2; 7639879a381SJiong Wang 7649879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 7659879a381SJiong Wang case BPF_B: 7669879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7679879a381SJiong Wang reg_xfer(xfer_num), 1, 7689879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 7699879a381SJiong Wang break; 7709879a381SJiong Wang case BPF_H: 7719879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7729879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 7739879a381SJiong Wang break; 7749879a381SJiong Wang case BPF_W: 7759879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7769879a381SJiong Wang reg_xfer(0)); 7779879a381SJiong Wang break; 7789879a381SJiong Wang case BPF_DW: 7799879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7809879a381SJiong Wang reg_xfer(xfer_num)); 7819879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 7829879a381SJiong Wang reg_xfer(xfer_num + 1)); 7839879a381SJiong Wang break; 7849879a381SJiong Wang } 7859879a381SJiong Wang 7869879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 7879879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 7889879a381SJiong Wang 7899879a381SJiong Wang return 0; 7909879a381SJiong Wang } 7919879a381SJiong Wang 792d9ae7f2bSJakub Kicinski static int 7930a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 794d9ae7f2bSJakub Kicinski { 795d9ae7f2bSJakub Kicinski unsigned int i; 796d9ae7f2bSJakub Kicinski u16 shift, sz; 797d9ae7f2bSJakub Kicinski 798d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 799d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 800d9ae7f2bSJakub Kicinski */ 8010a793977SJakub Kicinski sz = max(size, 4); 802d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 803d9ae7f2bSJakub Kicinski 8040a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 805b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 8060a793977SJakub Kicinski 8070a793977SJakub Kicinski i = 0; 8080a793977SJakub Kicinski if (shift) 8090a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 8100a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 8110a793977SJakub Kicinski else 8120a793977SJakub Kicinski for (; i * 4 < size; i++) 8130a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8140a793977SJakub Kicinski 8150a793977SJakub Kicinski if (i < 2) 8160a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 8170a793977SJakub Kicinski 8180a793977SJakub Kicinski return 0; 8190a793977SJakub Kicinski } 8200a793977SJakub Kicinski 8210a793977SJakub Kicinski static int 8223dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 8233dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 8242ca71441SJakub Kicinski { 8252ca71441SJakub Kicinski unsigned int i; 8262ca71441SJakub Kicinski u8 mask, sz; 8272ca71441SJakub Kicinski 8283dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 8292ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 8302ca71441SJakub Kicinski */ 8312ca71441SJakub Kicinski sz = max(size, 4); 8322ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 8332ca71441SJakub Kicinski 8343dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 835b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 8362ca71441SJakub Kicinski 8372ca71441SJakub Kicinski i = 0; 8382ca71441SJakub Kicinski if (mask) 8392ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 8402ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 8412ca71441SJakub Kicinski else 8422ca71441SJakub Kicinski for (; i * 4 < size; i++) 8432ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8442ca71441SJakub Kicinski 8452ca71441SJakub Kicinski if (i < 2) 8462ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 8472ca71441SJakub Kicinski 8482ca71441SJakub Kicinski return 0; 8492ca71441SJakub Kicinski } 8502ca71441SJakub Kicinski 8512ca71441SJakub Kicinski static int 8523dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 8533dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 8543dd43c33SJakub Kicinski { 8553dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 8563dd43c33SJakub Kicinski size, CMD_MODE_32b); 8573dd43c33SJakub Kicinski } 8583dd43c33SJakub Kicinski 8593dd43c33SJakub Kicinski static int 8603dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 8613dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 8623dd43c33SJakub Kicinski { 8633dd43c33SJakub Kicinski swreg rega, regb; 8643dd43c33SJakub Kicinski 8653dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 8663dd43c33SJakub Kicinski 8673dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 8683dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 8693dd43c33SJakub Kicinski } 8703dd43c33SJakub Kicinski 8713dd43c33SJakub Kicinski static int 8720a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 8730a793977SJakub Kicinski { 8740a793977SJakub Kicinski swreg tmp_reg; 8750a793977SJakub Kicinski 876d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 877d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8780a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 8790a793977SJakub Kicinski 880d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 881d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 882d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 883d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 88418e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 885e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8860a793977SJakub Kicinski 887d9ae7f2bSJakub Kicinski /* Load data */ 8880a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 889d9ae7f2bSJakub Kicinski } 890d9ae7f2bSJakub Kicinski 891d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 892d9ae7f2bSJakub Kicinski { 8930a793977SJakub Kicinski swreg tmp_reg; 8940a793977SJakub Kicinski 8950a793977SJakub Kicinski /* Check packet length */ 8960a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 8970a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 898e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8990a793977SJakub Kicinski 9000a793977SJakub Kicinski /* Load data */ 9010a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9020a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 903d9ae7f2bSJakub Kicinski } 904d9ae7f2bSJakub Kicinski 905e663fe38SJakub Kicinski static int 906e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 907e663fe38SJakub Kicinski u8 src_gpr, u8 size) 908e663fe38SJakub Kicinski { 909e663fe38SJakub Kicinski unsigned int i; 910e663fe38SJakub Kicinski 911e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 912e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 913e663fe38SJakub Kicinski 914e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 915b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 916e663fe38SJakub Kicinski 917e663fe38SJakub Kicinski return 0; 918e663fe38SJakub Kicinski } 919e663fe38SJakub Kicinski 920e663fe38SJakub Kicinski static int 921e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 922e663fe38SJakub Kicinski u64 imm, u8 size) 923e663fe38SJakub Kicinski { 924e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 925e663fe38SJakub Kicinski if (size == 8) 926e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 927e663fe38SJakub Kicinski 928e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 929b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 930e663fe38SJakub Kicinski 931e663fe38SJakub Kicinski return 0; 932e663fe38SJakub Kicinski } 933e663fe38SJakub Kicinski 934ee9133a8SJakub Kicinski typedef int 935ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 9362df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9372df03a50SJakub Kicinski bool needs_inc); 938a82b23fbSJakub Kicinski 939a82b23fbSJakub Kicinski static int 940a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 9412df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9422df03a50SJakub Kicinski bool needs_inc) 943a82b23fbSJakub Kicinski { 9442df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 945a82b23fbSJakub Kicinski u32 idx, src_byte; 946a82b23fbSJakub Kicinski enum shf_sc sc; 947a82b23fbSJakub Kicinski swreg reg; 948a82b23fbSJakub Kicinski int shf; 949a82b23fbSJakub Kicinski u8 mask; 950a82b23fbSJakub Kicinski 951a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 952a82b23fbSJakub Kicinski return -EOPNOTSUPP; 953a82b23fbSJakub Kicinski 954a82b23fbSJakub Kicinski idx = off / 4; 955a82b23fbSJakub Kicinski 956a82b23fbSJakub Kicinski /* Move the entire word */ 957a82b23fbSJakub Kicinski if (size == 4) { 9582df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 9592df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 960a82b23fbSJakub Kicinski return 0; 961a82b23fbSJakub Kicinski } 962a82b23fbSJakub Kicinski 9632df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9642df03a50SJakub Kicinski return -EOPNOTSUPP; 9652df03a50SJakub Kicinski 966a82b23fbSJakub Kicinski src_byte = off % 4; 967a82b23fbSJakub Kicinski 968a82b23fbSJakub Kicinski mask = (1 << size) - 1; 969a82b23fbSJakub Kicinski mask <<= dst_byte; 970a82b23fbSJakub Kicinski 971a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 972a82b23fbSJakub Kicinski return -EOPNOTSUPP; 973a82b23fbSJakub Kicinski 974a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 975a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 976a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 977a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 978a82b23fbSJakub Kicinski shf = 32 - shf; 979a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 980a82b23fbSJakub Kicinski } else { 981a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 982a82b23fbSJakub Kicinski } 983a82b23fbSJakub Kicinski 984a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 985a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 986a82b23fbSJakub Kicinski */ 987a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9882df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 989a82b23fbSJakub Kicinski } else { 990a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 9919a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 9929a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 9939a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 9949a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 9959a90c83cSJakub Kicinski */ 9969a90c83cSJakub Kicinski if (first || !new_gpr) 997a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 998a82b23fbSJakub Kicinski } 999a82b23fbSJakub Kicinski 1000a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 1001a82b23fbSJakub Kicinski 10022df03a50SJakub Kicinski if (should_inc) 10032df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10042df03a50SJakub Kicinski 1005a82b23fbSJakub Kicinski return 0; 1006a82b23fbSJakub Kicinski } 1007ee9133a8SJakub Kicinski 1008ee9133a8SJakub Kicinski static int 1009ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 10102df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10112df03a50SJakub Kicinski bool needs_inc) 1012ee9133a8SJakub Kicinski { 10132df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1014ee9133a8SJakub Kicinski u32 idx, dst_byte; 1015ee9133a8SJakub Kicinski enum shf_sc sc; 1016ee9133a8SJakub Kicinski swreg reg; 1017ee9133a8SJakub Kicinski int shf; 1018ee9133a8SJakub Kicinski u8 mask; 1019ee9133a8SJakub Kicinski 1020ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 1021ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1022ee9133a8SJakub Kicinski 1023ee9133a8SJakub Kicinski idx = off / 4; 1024ee9133a8SJakub Kicinski 1025ee9133a8SJakub Kicinski /* Move the entire word */ 1026ee9133a8SJakub Kicinski if (size == 4) { 10272df03a50SJakub Kicinski wrp_mov(nfp_prog, 10282df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 10292df03a50SJakub Kicinski reg_b(src)); 1030ee9133a8SJakub Kicinski return 0; 1031ee9133a8SJakub Kicinski } 1032ee9133a8SJakub Kicinski 10332df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 10342df03a50SJakub Kicinski return -EOPNOTSUPP; 10352df03a50SJakub Kicinski 1036ee9133a8SJakub Kicinski dst_byte = off % 4; 1037ee9133a8SJakub Kicinski 1038ee9133a8SJakub Kicinski mask = (1 << size) - 1; 1039ee9133a8SJakub Kicinski mask <<= dst_byte; 1040ee9133a8SJakub Kicinski 1041ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1042ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1043ee9133a8SJakub Kicinski 1044ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1045ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 1046ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 1047ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 1048ee9133a8SJakub Kicinski shf = 32 - shf; 1049ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 1050ee9133a8SJakub Kicinski } else { 1051ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 1052ee9133a8SJakub Kicinski } 1053ee9133a8SJakub Kicinski 1054ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1055ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1056ee9133a8SJakub Kicinski */ 1057ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 10582df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1059ee9133a8SJakub Kicinski } else { 1060ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 10619a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 10629a90c83cSJakub Kicinski * the middle location will be overwritten fully. 10639a90c83cSJakub Kicinski */ 10649a90c83cSJakub Kicinski if (first || last) 1065ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1066ee9133a8SJakub Kicinski } 1067ee9133a8SJakub Kicinski 1068ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 1069ee9133a8SJakub Kicinski 10709a90c83cSJakub Kicinski if (new_gpr || last) { 1071ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1072ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 10732df03a50SJakub Kicinski if (should_inc) 10742df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10759a90c83cSJakub Kicinski } 1076ee9133a8SJakub Kicinski 1077ee9133a8SJakub Kicinski return 0; 1078ee9133a8SJakub Kicinski } 1079ee9133a8SJakub Kicinski 1080ee9133a8SJakub Kicinski static int 1081ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1082b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1083b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1084ee9133a8SJakub Kicinski { 1085d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 10869a90c83cSJakub Kicinski bool first = true, last; 10872df03a50SJakub Kicinski bool needs_inc = false; 10882df03a50SJakub Kicinski swreg stack_off_reg; 1089a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1090ee9133a8SJakub Kicinski u32 gpr_byte = 0; 10912df03a50SJakub Kicinski bool lm3 = true; 1092ee9133a8SJakub Kicinski int ret; 1093ee9133a8SJakub Kicinski 1094b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1095b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1096b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1097b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1098b14157eeSJakub Kicinski */ 1099b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1100b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1101b14157eeSJakub Kicinski 1102b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1103b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1104b14157eeSJakub Kicinski 1105b14157eeSJakub Kicinski needs_inc = true; 1106b14157eeSJakub Kicinski } else if (off + size <= 64) { 11072df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 11082df03a50SJakub Kicinski lm3 = false; 11092df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 11102df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 11112df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 11122df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 11132df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 11142df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 11152df03a50SJakub Kicinski */ 11162df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 11172df03a50SJakub Kicinski stack_imm(nfp_prog)); 11182df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11192df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11202df03a50SJakub Kicinski 11212df03a50SJakub Kicinski off %= 32; 11222df03a50SJakub Kicinski } else { 11232df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 11242df03a50SJakub Kicinski stack_imm(nfp_prog)); 11252df03a50SJakub Kicinski 11262df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11272df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11282df03a50SJakub Kicinski 11292df03a50SJakub Kicinski needs_inc = true; 11302df03a50SJakub Kicinski } 11312df03a50SJakub Kicinski if (lm3) { 11322df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 11332df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 11342df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 11352df03a50SJakub Kicinski } 11362df03a50SJakub Kicinski 1137a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1138a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1139a82b23fbSJakub Kicinski 1140ee9133a8SJakub Kicinski while (size) { 1141ee9133a8SJakub Kicinski u32 slice_end; 1142ee9133a8SJakub Kicinski u8 slice_size; 1143ee9133a8SJakub Kicinski 1144ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1145ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1146ee9133a8SJakub Kicinski slice_size = slice_end - off; 1147ee9133a8SJakub Kicinski 11489a90c83cSJakub Kicinski last = slice_size == size; 11499a90c83cSJakub Kicinski 11502df03a50SJakub Kicinski if (needs_inc) 11512df03a50SJakub Kicinski off %= 4; 11522df03a50SJakub Kicinski 1153a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 11542df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1155ee9133a8SJakub Kicinski if (ret) 1156ee9133a8SJakub Kicinski return ret; 1157ee9133a8SJakub Kicinski 1158a82b23fbSJakub Kicinski prev_gpr = gpr; 11599a90c83cSJakub Kicinski first = false; 11609a90c83cSJakub Kicinski 1161ee9133a8SJakub Kicinski gpr_byte += slice_size; 1162ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1163ee9133a8SJakub Kicinski gpr_byte -= 4; 1164ee9133a8SJakub Kicinski gpr++; 1165ee9133a8SJakub Kicinski } 1166ee9133a8SJakub Kicinski 1167ee9133a8SJakub Kicinski size -= slice_size; 1168ee9133a8SJakub Kicinski off += slice_size; 1169ee9133a8SJakub Kicinski } 1170ee9133a8SJakub Kicinski 1171ee9133a8SJakub Kicinski return 0; 1172ee9133a8SJakub Kicinski } 1173ee9133a8SJakub Kicinski 1174d9ae7f2bSJakub Kicinski static void 1175d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1176d9ae7f2bSJakub Kicinski { 1177b3f868dfSJakub Kicinski swreg tmp_reg; 1178d9ae7f2bSJakub Kicinski 1179d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1180d9ae7f2bSJakub Kicinski if (!imm) 1181d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1182d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1183d9ae7f2bSJakub Kicinski return; 1184d9ae7f2bSJakub Kicinski } 1185d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1186d9ae7f2bSJakub Kicinski if (!~imm) 1187d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1188d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1189d9ae7f2bSJakub Kicinski return; 1190d9ae7f2bSJakub Kicinski } 1191d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1192d9ae7f2bSJakub Kicinski if (!~imm) 1193d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 11945d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1195d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1196d9ae7f2bSJakub Kicinski return; 1197d9ae7f2bSJakub Kicinski } 1198d9ae7f2bSJakub Kicinski 1199d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1200d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1201d9ae7f2bSJakub Kicinski } 1202d9ae7f2bSJakub Kicinski 1203d9ae7f2bSJakub Kicinski static int 1204d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1205d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1206d9ae7f2bSJakub Kicinski { 1207d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1208d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1209d9ae7f2bSJakub Kicinski 1210d9ae7f2bSJakub Kicinski if (skip) { 1211d9ae7f2bSJakub Kicinski meta->skip = true; 1212d9ae7f2bSJakub Kicinski return 0; 1213d9ae7f2bSJakub Kicinski } 1214d9ae7f2bSJakub Kicinski 1215d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1216d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1217d9ae7f2bSJakub Kicinski 1218d9ae7f2bSJakub Kicinski return 0; 1219d9ae7f2bSJakub Kicinski } 1220d9ae7f2bSJakub Kicinski 1221d9ae7f2bSJakub Kicinski static int 1222d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1223d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1224d9ae7f2bSJakub Kicinski { 1225d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1226d9ae7f2bSJakub Kicinski 1227d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1228d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1229d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1230d9ae7f2bSJakub Kicinski 1231d9ae7f2bSJakub Kicinski return 0; 1232d9ae7f2bSJakub Kicinski } 1233d9ae7f2bSJakub Kicinski 1234d9ae7f2bSJakub Kicinski static int 1235d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1236d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1237d9ae7f2bSJakub Kicinski { 1238d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1239d9ae7f2bSJakub Kicinski 1240d9ae7f2bSJakub Kicinski if (skip) { 1241d9ae7f2bSJakub Kicinski meta->skip = true; 1242d9ae7f2bSJakub Kicinski return 0; 1243d9ae7f2bSJakub Kicinski } 1244d9ae7f2bSJakub Kicinski 1245d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1246d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1247d9ae7f2bSJakub Kicinski 1248d9ae7f2bSJakub Kicinski return 0; 1249d9ae7f2bSJakub Kicinski } 1250d9ae7f2bSJakub Kicinski 1251d9ae7f2bSJakub Kicinski static int 1252d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1253d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1254d9ae7f2bSJakub Kicinski { 1255d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1256d9ae7f2bSJakub Kicinski 1257d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1258d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1259d9ae7f2bSJakub Kicinski 1260d9ae7f2bSJakub Kicinski return 0; 1261d9ae7f2bSJakub Kicinski } 1262d9ae7f2bSJakub Kicinski 1263d9ae7f2bSJakub Kicinski static void 1264d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1265d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1266d9ae7f2bSJakub Kicinski { 1267d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1268d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1269d9ae7f2bSJakub Kicinski } 1270d9ae7f2bSJakub Kicinski 1271d9ae7f2bSJakub Kicinski static int 1272d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1273d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1274d9ae7f2bSJakub Kicinski { 1275d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1276d9ae7f2bSJakub Kicinski 1277d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1278d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1279d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1280d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1281d9ae7f2bSJakub Kicinski 1282d9ae7f2bSJakub Kicinski return 0; 1283d9ae7f2bSJakub Kicinski } 1284d9ae7f2bSJakub Kicinski 128561dd8f00SJakub Kicinski static const struct jmp_code_map { 128661dd8f00SJakub Kicinski enum br_mask br_mask; 128761dd8f00SJakub Kicinski bool swap; 128861dd8f00SJakub Kicinski } jmp_code_map[] = { 128961dd8f00SJakub Kicinski [BPF_JGT >> 4] = { BR_BLO, true }, 129061dd8f00SJakub Kicinski [BPF_JGE >> 4] = { BR_BHS, false }, 129161dd8f00SJakub Kicinski [BPF_JLT >> 4] = { BR_BLO, false }, 129261dd8f00SJakub Kicinski [BPF_JLE >> 4] = { BR_BHS, true }, 129361dd8f00SJakub Kicinski [BPF_JSGT >> 4] = { BR_BLT, true }, 129461dd8f00SJakub Kicinski [BPF_JSGE >> 4] = { BR_BGE, false }, 129561dd8f00SJakub Kicinski [BPF_JSLT >> 4] = { BR_BLT, false }, 129661dd8f00SJakub Kicinski [BPF_JSLE >> 4] = { BR_BGE, true }, 129761dd8f00SJakub Kicinski }; 129861dd8f00SJakub Kicinski 129961dd8f00SJakub Kicinski static const struct jmp_code_map *nfp_jmp_code_get(struct nfp_insn_meta *meta) 130061dd8f00SJakub Kicinski { 130161dd8f00SJakub Kicinski unsigned int op; 130261dd8f00SJakub Kicinski 130361dd8f00SJakub Kicinski op = BPF_OP(meta->insn.code) >> 4; 130461dd8f00SJakub Kicinski /* br_mask of 0 is BR_BEQ which we don't use in jump code table */ 130561dd8f00SJakub Kicinski if (WARN_ONCE(op >= ARRAY_SIZE(jmp_code_map) || 130661dd8f00SJakub Kicinski !jmp_code_map[op].br_mask, 130761dd8f00SJakub Kicinski "no code found for jump instruction")) 130861dd8f00SJakub Kicinski return NULL; 130961dd8f00SJakub Kicinski 131061dd8f00SJakub Kicinski return &jmp_code_map[op]; 131161dd8f00SJakub Kicinski } 131261dd8f00SJakub Kicinski 131361dd8f00SJakub Kicinski static int cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1314d9ae7f2bSJakub Kicinski { 1315d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1316d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 131761dd8f00SJakub Kicinski const struct jmp_code_map *code; 13187bdc97beSJakub Kicinski enum alu_op alu_op, carry_op; 1319d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1320b3f868dfSJakub Kicinski swreg tmp_reg; 1321d9ae7f2bSJakub Kicinski 132261dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 132361dd8f00SJakub Kicinski if (!code) 132461dd8f00SJakub Kicinski return -EINVAL; 132561dd8f00SJakub Kicinski 13267bdc97beSJakub Kicinski alu_op = meta->jump_neg_op ? ALU_OP_ADD : ALU_OP_SUB; 13277bdc97beSJakub Kicinski carry_op = meta->jump_neg_op ? ALU_OP_ADD_C : ALU_OP_SUB_C; 13287bdc97beSJakub Kicinski 1329d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 133061dd8f00SJakub Kicinski if (!code->swap) 13317bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), alu_op, tmp_reg); 1332d9ae7f2bSJakub Kicinski else 13337bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, alu_op, reg_a(reg)); 1334d9ae7f2bSJakub Kicinski 1335d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 133661dd8f00SJakub Kicinski if (!code->swap) 1337d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 13387bdc97beSJakub Kicinski reg_a(reg + 1), carry_op, tmp_reg); 1339d9ae7f2bSJakub Kicinski else 1340d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 13417bdc97beSJakub Kicinski tmp_reg, carry_op, reg_a(reg + 1)); 1342d9ae7f2bSJakub Kicinski 134361dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1344d9ae7f2bSJakub Kicinski 1345d9ae7f2bSJakub Kicinski return 0; 1346d9ae7f2bSJakub Kicinski } 1347d9ae7f2bSJakub Kicinski 134861dd8f00SJakub Kicinski static int cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1349d9ae7f2bSJakub Kicinski { 1350d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 135161dd8f00SJakub Kicinski const struct jmp_code_map *code; 135226fa818dSJakub Kicinski u8 areg, breg; 135326fa818dSJakub Kicinski 135461dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 135561dd8f00SJakub Kicinski if (!code) 135661dd8f00SJakub Kicinski return -EINVAL; 135761dd8f00SJakub Kicinski 135826fa818dSJakub Kicinski areg = insn->dst_reg * 2; 135926fa818dSJakub Kicinski breg = insn->src_reg * 2; 1360d9ae7f2bSJakub Kicinski 136161dd8f00SJakub Kicinski if (code->swap) { 1362d9ae7f2bSJakub Kicinski areg ^= breg; 1363d9ae7f2bSJakub Kicinski breg ^= areg; 1364d9ae7f2bSJakub Kicinski areg ^= breg; 1365d9ae7f2bSJakub Kicinski } 1366d9ae7f2bSJakub Kicinski 1367d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1368d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1369d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 137061dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1371d9ae7f2bSJakub Kicinski 1372d9ae7f2bSJakub Kicinski return 0; 1373d9ae7f2bSJakub Kicinski } 1374d9ae7f2bSJakub Kicinski 13753119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 13763119d1fdSJakub Kicinski { 13773119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 13783119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 13793119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 13803119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 13813119d1fdSJakub Kicinski } 13823119d1fdSJakub Kicinski 13830d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 13840d49eaf4SJakub Kicinski { 13850d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 13860d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 13870d49eaf4SJakub Kicinski u32 ret_einval, end; 13880d49eaf4SJakub Kicinski 13890d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 13900d49eaf4SJakub Kicinski 13918231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 13928231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 13938231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 13948231f844SJakub Kicinski return -EINVAL; 13958231f844SJakub Kicinski 13968231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 13978231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 13988231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13998231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14008231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 14018231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14028231f844SJakub Kicinski 14038231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 14048231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 14058231f844SJakub Kicinski 14068231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 14078231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 14088231f844SJakub Kicinski */ 14098231f844SJakub Kicinski 14108231f844SJakub Kicinski return 0; 14118231f844SJakub Kicinski } 14128231f844SJakub Kicinski 14130d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 14140d49eaf4SJakub Kicinski end = ret_einval + 2; 14150d49eaf4SJakub Kicinski 14160d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 14170d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 14180d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 14190d49eaf4SJakub Kicinski 14200d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 14210d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 14220d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 14230d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 14240d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 14250d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 14260d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 14270d49eaf4SJakub Kicinski 14280d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 14290d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 14300d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14310d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 14320d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 14330d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 14340d49eaf4SJakub Kicinski 14350d49eaf4SJakub Kicinski /* Load the ret code */ 14360d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 14370d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 14380d49eaf4SJakub Kicinski 14390d49eaf4SJakub Kicinski /* Modify the packet metadata */ 14400d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 14410d49eaf4SJakub Kicinski 14420d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 14432314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 14440d49eaf4SJakub Kicinski 14450d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 14460d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14470d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 14480d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14490d49eaf4SJakub Kicinski 14500d49eaf4SJakub Kicinski /* return -EINVAL target */ 14510d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 14520d49eaf4SJakub Kicinski return -EINVAL; 14530d49eaf4SJakub Kicinski 14540d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 14550d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 14560d49eaf4SJakub Kicinski 14570d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 14580d49eaf4SJakub Kicinski return -EINVAL; 14590d49eaf4SJakub Kicinski 14600d49eaf4SJakub Kicinski return 0; 14610d49eaf4SJakub Kicinski } 14620d49eaf4SJakub Kicinski 146377a3d311SJakub Kicinski static int 1464fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 146577a3d311SJakub Kicinski { 146677a3d311SJakub Kicinski bool load_lm_ptr; 146777a3d311SJakub Kicinski u32 ret_tgt; 146877a3d311SJakub Kicinski s64 lm_off; 146977a3d311SJakub Kicinski 147077a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 147177a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 14722f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 14732f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 147477a3d311SJakub Kicinski 147577a3d311SJakub Kicinski /* Set LM0 to start of key */ 147677a3d311SJakub Kicinski if (load_lm_ptr) 147777a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 147844d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 147944d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 148077a3d311SJakub Kicinski 1481fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 148277a3d311SJakub Kicinski 2, RELO_BR_HELPER); 148377a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 148477a3d311SJakub Kicinski 148577a3d311SJakub Kicinski /* Load map ID into A0 */ 1486b4264c96SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), reg_a(2)); 148777a3d311SJakub Kicinski 148877a3d311SJakub Kicinski /* Load the return address into B0 */ 148977a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 149077a3d311SJakub Kicinski 149177a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 149277a3d311SJakub Kicinski return -EINVAL; 149377a3d311SJakub Kicinski 149477a3d311SJakub Kicinski /* Reset the LM0 pointer */ 149577a3d311SJakub Kicinski if (!load_lm_ptr) 149677a3d311SJakub Kicinski return 0; 149777a3d311SJakub Kicinski 149877a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 149977a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 150077a3d311SJakub Kicinski 150177a3d311SJakub Kicinski return 0; 150277a3d311SJakub Kicinski } 150377a3d311SJakub Kicinski 1504df4a37d8SJakub Kicinski static int 1505df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1506df4a37d8SJakub Kicinski { 1507df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1508df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1509df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1510df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1511df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1512df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1513df4a37d8SJakub Kicinski return 0; 1514df4a37d8SJakub Kicinski } 1515df4a37d8SJakub Kicinski 15169816dd35SJakub Kicinski static int 15179816dd35SJakub Kicinski nfp_perf_event_output(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 15189816dd35SJakub Kicinski { 15199816dd35SJakub Kicinski swreg ptr_type; 15209816dd35SJakub Kicinski u32 ret_tgt; 15219816dd35SJakub Kicinski 15229816dd35SJakub Kicinski ptr_type = ur_load_imm_any(nfp_prog, meta->arg1.type, imm_a(nfp_prog)); 15239816dd35SJakub Kicinski 15249816dd35SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 15259816dd35SJakub Kicinski 15269816dd35SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 15279816dd35SJakub Kicinski 2, RELO_BR_HELPER); 15289816dd35SJakub Kicinski 15299816dd35SJakub Kicinski /* Load ptr type into A1 */ 15309816dd35SJakub Kicinski wrp_mov(nfp_prog, reg_a(1), ptr_type); 15319816dd35SJakub Kicinski 15329816dd35SJakub Kicinski /* Load the return address into B0 */ 15339816dd35SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 15349816dd35SJakub Kicinski 15359816dd35SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 15369816dd35SJakub Kicinski return -EINVAL; 15379816dd35SJakub Kicinski 15389816dd35SJakub Kicinski return 0; 15399816dd35SJakub Kicinski } 15409816dd35SJakub Kicinski 1541d985888fSJakub Kicinski static int 1542d985888fSJakub Kicinski nfp_queue_select(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1543d985888fSJakub Kicinski { 1544d985888fSJakub Kicinski u32 jmp_tgt; 1545d985888fSJakub Kicinski 1546d985888fSJakub Kicinski jmp_tgt = nfp_prog_current_offset(nfp_prog) + 5; 1547d985888fSJakub Kicinski 1548d985888fSJakub Kicinski /* Make sure the queue id fits into FW field */ 1549d985888fSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(meta->insn.src_reg * 2), 1550d985888fSJakub Kicinski ALU_OP_AND_NOT_B, reg_imm(0xff)); 1551d985888fSJakub Kicinski emit_br(nfp_prog, BR_BEQ, jmp_tgt, 2); 1552d985888fSJakub Kicinski 1553d985888fSJakub Kicinski /* Set the 'queue selected' bit and the queue value */ 1554d985888fSJakub Kicinski emit_shf(nfp_prog, pv_qsel_set(nfp_prog), 1555d985888fSJakub Kicinski pv_qsel_set(nfp_prog), SHF_OP_OR, reg_imm(1), 1556d985888fSJakub Kicinski SHF_SC_L_SHF, PKT_VEL_QSEL_SET_BIT); 1557d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1558d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_b(meta->insn.src_reg * 2), 1559d985888fSJakub Kicinski SHF_SC_NONE, 0); 1560d985888fSJakub Kicinski /* Delay slots end here, we will jump over next instruction if queue 1561d985888fSJakub Kicinski * value fits into the field. 1562d985888fSJakub Kicinski */ 1563d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1564d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_imm(NFP_NET_RXR_MAX), 1565d985888fSJakub Kicinski SHF_SC_NONE, 0); 1566d985888fSJakub Kicinski 1567d985888fSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, jmp_tgt)) 1568d985888fSJakub Kicinski return -EINVAL; 1569d985888fSJakub Kicinski 1570d985888fSJakub Kicinski return 0; 1571d985888fSJakub Kicinski } 1572d985888fSJakub Kicinski 1573d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1574d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1575d9ae7f2bSJakub Kicinski { 1576d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1577b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1578b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1579d9ae7f2bSJakub Kicinski 1580b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1581b14157eeSJakub Kicinski swreg stack_depth_reg; 1582b14157eeSJakub Kicinski 1583b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1584b14157eeSJakub Kicinski nfp_prog->stack_depth, 1585b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1586b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1587b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1588b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1589b14157eeSJakub Kicinski } else { 1590b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1591b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1592b14157eeSJakub Kicinski } 1593d9ae7f2bSJakub Kicinski 1594d9ae7f2bSJakub Kicinski return 0; 1595d9ae7f2bSJakub Kicinski } 1596d9ae7f2bSJakub Kicinski 1597d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1598d9ae7f2bSJakub Kicinski { 1599d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1600d9ae7f2bSJakub Kicinski 1601d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1602d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1603d9ae7f2bSJakub Kicinski 1604d9ae7f2bSJakub Kicinski return 0; 1605d9ae7f2bSJakub Kicinski } 1606d9ae7f2bSJakub Kicinski 1607d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1608d9ae7f2bSJakub Kicinski { 1609d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1610d9ae7f2bSJakub Kicinski } 1611d9ae7f2bSJakub Kicinski 1612d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1613d9ae7f2bSJakub Kicinski { 1614d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1615d9ae7f2bSJakub Kicinski } 1616d9ae7f2bSJakub Kicinski 1617d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1618d9ae7f2bSJakub Kicinski { 1619d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1620d9ae7f2bSJakub Kicinski } 1621d9ae7f2bSJakub Kicinski 1622d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1623d9ae7f2bSJakub Kicinski { 1624d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1625d9ae7f2bSJakub Kicinski } 1626d9ae7f2bSJakub Kicinski 1627d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1628d9ae7f2bSJakub Kicinski { 1629d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1630d9ae7f2bSJakub Kicinski } 1631d9ae7f2bSJakub Kicinski 1632d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1633d9ae7f2bSJakub Kicinski { 1634d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1635d9ae7f2bSJakub Kicinski } 1636d9ae7f2bSJakub Kicinski 1637d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1638d9ae7f2bSJakub Kicinski { 1639d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1640d9ae7f2bSJakub Kicinski 1641d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1642d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1643d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1644d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1645d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1646d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1647d9ae7f2bSJakub Kicinski 1648d9ae7f2bSJakub Kicinski return 0; 1649d9ae7f2bSJakub Kicinski } 1650d9ae7f2bSJakub Kicinski 1651d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1652d9ae7f2bSJakub Kicinski { 1653d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1654d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1655d9ae7f2bSJakub Kicinski 1656d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1657d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1658d9ae7f2bSJakub Kicinski 1659d9ae7f2bSJakub Kicinski return 0; 1660d9ae7f2bSJakub Kicinski } 1661d9ae7f2bSJakub Kicinski 1662d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1663d9ae7f2bSJakub Kicinski { 1664d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1665d9ae7f2bSJakub Kicinski 1666d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1667d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1668d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1669d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1670d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1671d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1672d9ae7f2bSJakub Kicinski 1673d9ae7f2bSJakub Kicinski return 0; 1674d9ae7f2bSJakub Kicinski } 1675d9ae7f2bSJakub Kicinski 1676d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1677d9ae7f2bSJakub Kicinski { 1678d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1679d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1680d9ae7f2bSJakub Kicinski 1681d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1682d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1683d9ae7f2bSJakub Kicinski 1684d9ae7f2bSJakub Kicinski return 0; 1685d9ae7f2bSJakub Kicinski } 1686d9ae7f2bSJakub Kicinski 1687254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1688254ef4d7SJiong Wang { 1689254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1690254ef4d7SJiong Wang 1691254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1692254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1693254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1694254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1695254ef4d7SJiong Wang 1696254ef4d7SJiong Wang return 0; 1697254ef4d7SJiong Wang } 1698254ef4d7SJiong Wang 1699991f5b36SJiong Wang /* Pseudo code: 1700991f5b36SJiong Wang * if shift_amt >= 32 1701991f5b36SJiong Wang * dst_high = dst_low << shift_amt[4:0] 1702991f5b36SJiong Wang * dst_low = 0; 1703991f5b36SJiong Wang * else 1704991f5b36SJiong Wang * dst_high = (dst_high, dst_low) >> (32 - shift_amt) 1705991f5b36SJiong Wang * dst_low = dst_low << shift_amt 1706991f5b36SJiong Wang * 1707991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1708991f5b36SJiong Wang */ 1709991f5b36SJiong Wang static int __shl_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1710991f5b36SJiong Wang { 1711991f5b36SJiong Wang if (shift_amt < 32) { 1712991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), 1713991f5b36SJiong Wang SHF_OP_NONE, reg_b(dst), SHF_SC_R_DSHF, 1714991f5b36SJiong Wang 32 - shift_amt); 1715991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1716991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 1717991f5b36SJiong Wang } else if (shift_amt == 32) { 1718991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst + 1, dst); 1719991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1720991f5b36SJiong Wang } else if (shift_amt > 32) { 1721991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1722991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt - 32); 1723991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1724991f5b36SJiong Wang } 1725991f5b36SJiong Wang 1726991f5b36SJiong Wang return 0; 1727991f5b36SJiong Wang } 1728991f5b36SJiong Wang 1729d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1730d9ae7f2bSJakub Kicinski { 1731d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 17323cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1733d9ae7f2bSJakub Kicinski 1734991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, insn->imm); 1735991f5b36SJiong Wang } 1736991f5b36SJiong Wang 1737991f5b36SJiong Wang static void shl_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1738991f5b36SJiong Wang { 1739991f5b36SJiong Wang emit_alu(nfp_prog, imm_both(nfp_prog), reg_imm(32), ALU_OP_SUB, 1740991f5b36SJiong Wang reg_b(src)); 1741991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, reg_imm(0)); 1742991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), SHF_OP_NONE, 1743991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 1744991f5b36SJiong Wang } 1745991f5b36SJiong Wang 1746991f5b36SJiong Wang /* NOTE: for indirect left shift, HIGH part should be calculated first. */ 1747991f5b36SJiong Wang static void shl_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1748991f5b36SJiong Wang { 1749991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1750991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1751991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 1752991f5b36SJiong Wang } 1753991f5b36SJiong Wang 1754991f5b36SJiong Wang static void shl_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1755991f5b36SJiong Wang { 1756991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 1757991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 1758991f5b36SJiong Wang } 1759991f5b36SJiong Wang 1760991f5b36SJiong Wang static void shl_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1761991f5b36SJiong Wang { 1762991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1763991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1764991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 17653cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1766991f5b36SJiong Wang } 1767991f5b36SJiong Wang 1768991f5b36SJiong Wang static int shl_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1769991f5b36SJiong Wang { 1770991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 1771991f5b36SJiong Wang u64 umin, umax; 1772991f5b36SJiong Wang u8 dst, src; 1773991f5b36SJiong Wang 1774991f5b36SJiong Wang dst = insn->dst_reg * 2; 1775662c5472SJiong Wang umin = meta->umin_src; 1776662c5472SJiong Wang umax = meta->umax_src; 1777991f5b36SJiong Wang if (umin == umax) 1778991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, umin); 1779991f5b36SJiong Wang 1780991f5b36SJiong Wang src = insn->src_reg * 2; 1781991f5b36SJiong Wang if (umax < 32) { 1782991f5b36SJiong Wang shl_reg64_lt32(nfp_prog, dst, src); 1783991f5b36SJiong Wang } else if (umin >= 32) { 1784991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 1785991f5b36SJiong Wang } else { 1786991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 1787991f5b36SJiong Wang * value of shift amount. 1788991f5b36SJiong Wang */ 1789991f5b36SJiong Wang u16 label_ge32, label_end; 1790991f5b36SJiong Wang 1791991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 7; 1792991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 1793991f5b36SJiong Wang 1794991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 1795991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 1796991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 1797991f5b36SJiong Wang /* shl_reg64_lt32_low packed in delay slot. */ 1798991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 1799991f5b36SJiong Wang 1800991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 1801991f5b36SJiong Wang return -EINVAL; 1802991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 1803991f5b36SJiong Wang 1804991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 1805991f5b36SJiong Wang return -EINVAL; 1806991f5b36SJiong Wang } 1807991f5b36SJiong Wang 1808991f5b36SJiong Wang return 0; 1809991f5b36SJiong Wang } 1810991f5b36SJiong Wang 1811991f5b36SJiong Wang /* Pseudo code: 1812991f5b36SJiong Wang * if shift_amt >= 32 1813991f5b36SJiong Wang * dst_high = 0; 1814991f5b36SJiong Wang * dst_low = dst_high >> shift_amt[4:0] 1815991f5b36SJiong Wang * else 1816991f5b36SJiong Wang * dst_high = dst_high >> shift_amt 1817991f5b36SJiong Wang * dst_low = (dst_high, dst_low) >> shift_amt 1818991f5b36SJiong Wang * 1819991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1820991f5b36SJiong Wang */ 1821991f5b36SJiong Wang static int __shr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1822991f5b36SJiong Wang { 1823991f5b36SJiong Wang if (shift_amt < 32) { 1824991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 1825991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 1826991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1827991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 1828991f5b36SJiong Wang } else if (shift_amt == 32) { 1829991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 1830991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1831991f5b36SJiong Wang } else if (shift_amt > 32) { 1832991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1833991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 1834991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 18353cae1319SJakub Kicinski } 1836d9ae7f2bSJakub Kicinski 1837d9ae7f2bSJakub Kicinski return 0; 1838d9ae7f2bSJakub Kicinski } 1839d9ae7f2bSJakub Kicinski 1840d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1841d9ae7f2bSJakub Kicinski { 1842d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 18433cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1844d9ae7f2bSJakub Kicinski 1845991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, insn->imm); 1846991f5b36SJiong Wang } 1847991f5b36SJiong Wang 1848991f5b36SJiong Wang /* NOTE: for indirect right shift, LOW part should be calculated first. */ 1849991f5b36SJiong Wang static void shr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1850991f5b36SJiong Wang { 1851991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1852991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1853991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 1854991f5b36SJiong Wang } 1855991f5b36SJiong Wang 1856991f5b36SJiong Wang static void shr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1857991f5b36SJiong Wang { 1858991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1859991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 1860991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 1861991f5b36SJiong Wang } 1862991f5b36SJiong Wang 1863991f5b36SJiong Wang static void shr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1864991f5b36SJiong Wang { 1865991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 1866991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 1867991f5b36SJiong Wang } 1868991f5b36SJiong Wang 1869991f5b36SJiong Wang static void shr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1870991f5b36SJiong Wang { 1871991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1872991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1873991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 18743cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1875991f5b36SJiong Wang } 1876991f5b36SJiong Wang 1877991f5b36SJiong Wang static int shr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1878991f5b36SJiong Wang { 1879991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 1880991f5b36SJiong Wang u64 umin, umax; 1881991f5b36SJiong Wang u8 dst, src; 1882991f5b36SJiong Wang 1883991f5b36SJiong Wang dst = insn->dst_reg * 2; 1884662c5472SJiong Wang umin = meta->umin_src; 1885662c5472SJiong Wang umax = meta->umax_src; 1886991f5b36SJiong Wang if (umin == umax) 1887991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, umin); 1888991f5b36SJiong Wang 1889991f5b36SJiong Wang src = insn->src_reg * 2; 1890991f5b36SJiong Wang if (umax < 32) { 1891991f5b36SJiong Wang shr_reg64_lt32(nfp_prog, dst, src); 1892991f5b36SJiong Wang } else if (umin >= 32) { 1893991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 1894991f5b36SJiong Wang } else { 1895991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 1896991f5b36SJiong Wang * value of shift amount. 1897991f5b36SJiong Wang */ 1898991f5b36SJiong Wang u16 label_ge32, label_end; 1899991f5b36SJiong Wang 1900991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 1901991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 1902991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 1903991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 1904991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 1905991f5b36SJiong Wang /* shr_reg64_lt32_high packed in delay slot. */ 1906991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 1907991f5b36SJiong Wang 1908991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 1909991f5b36SJiong Wang return -EINVAL; 1910991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 1911991f5b36SJiong Wang 1912991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 1913991f5b36SJiong Wang return -EINVAL; 19143cae1319SJakub Kicinski } 1915d9ae7f2bSJakub Kicinski 1916d9ae7f2bSJakub Kicinski return 0; 1917d9ae7f2bSJakub Kicinski } 1918d9ae7f2bSJakub Kicinski 1919f43d0f17SJiong Wang /* Code logic is the same as __shr_imm64 except ashr requires signedness bit 1920f43d0f17SJiong Wang * told through PREV_ALU result. 1921f43d0f17SJiong Wang */ 1922c217abccSJiong Wang static int __ashr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1923c217abccSJiong Wang { 1924c217abccSJiong Wang if (shift_amt < 32) { 1925c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 1926c217abccSJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 1927c217abccSJiong Wang /* Set signedness bit. */ 1928c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 1929c217abccSJiong Wang reg_imm(0)); 1930c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 1931c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 1932c217abccSJiong Wang } else if (shift_amt == 32) { 1933c217abccSJiong Wang /* NOTE: this also helps setting signedness bit. */ 1934c217abccSJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 1935c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 1936c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 1937c217abccSJiong Wang } else if (shift_amt > 32) { 1938c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 1939c217abccSJiong Wang reg_imm(0)); 1940c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 1941c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 1942c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 1943c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 1944c217abccSJiong Wang } 1945c217abccSJiong Wang 1946c217abccSJiong Wang return 0; 1947c217abccSJiong Wang } 1948c217abccSJiong Wang 1949f43d0f17SJiong Wang static int ashr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1950f43d0f17SJiong Wang { 1951f43d0f17SJiong Wang const struct bpf_insn *insn = &meta->insn; 1952f43d0f17SJiong Wang u8 dst = insn->dst_reg * 2; 1953f43d0f17SJiong Wang 1954c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, insn->imm); 1955c217abccSJiong Wang } 1956c217abccSJiong Wang 1957c217abccSJiong Wang static void ashr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1958c217abccSJiong Wang { 1959c217abccSJiong Wang /* NOTE: the first insn will set both indirect shift amount (source A) 1960c217abccSJiong Wang * and signedness bit (MSB of result). 1961c217abccSJiong Wang */ 1962c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 1963c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 1964c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 1965c217abccSJiong Wang } 1966c217abccSJiong Wang 1967c217abccSJiong Wang static void ashr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1968c217abccSJiong Wang { 1969c217abccSJiong Wang /* NOTE: it is the same as logic shift because we don't need to shift in 1970c217abccSJiong Wang * signedness bit when the shift amount is less than 32. 1971c217abccSJiong Wang */ 1972c217abccSJiong Wang return shr_reg64_lt32_low(nfp_prog, dst, src); 1973c217abccSJiong Wang } 1974c217abccSJiong Wang 1975c217abccSJiong Wang static void ashr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1976c217abccSJiong Wang { 1977c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 1978c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 1979c217abccSJiong Wang } 1980c217abccSJiong Wang 1981c217abccSJiong Wang static void ashr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1982c217abccSJiong Wang { 1983c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 1984c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 1985c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 1986f43d0f17SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 1987f43d0f17SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 1988c217abccSJiong Wang } 1989c217abccSJiong Wang 1990c217abccSJiong Wang /* Like ashr_imm64, but need to use indirect shift. */ 1991c217abccSJiong Wang static int ashr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1992c217abccSJiong Wang { 1993c217abccSJiong Wang const struct bpf_insn *insn = &meta->insn; 1994c217abccSJiong Wang u64 umin, umax; 1995c217abccSJiong Wang u8 dst, src; 1996c217abccSJiong Wang 1997c217abccSJiong Wang dst = insn->dst_reg * 2; 1998662c5472SJiong Wang umin = meta->umin_src; 1999662c5472SJiong Wang umax = meta->umax_src; 2000c217abccSJiong Wang if (umin == umax) 2001c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, umin); 2002c217abccSJiong Wang 2003c217abccSJiong Wang src = insn->src_reg * 2; 2004c217abccSJiong Wang if (umax < 32) { 2005c217abccSJiong Wang ashr_reg64_lt32(nfp_prog, dst, src); 2006c217abccSJiong Wang } else if (umin >= 32) { 2007c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2008c217abccSJiong Wang } else { 2009c217abccSJiong Wang u16 label_ge32, label_end; 2010c217abccSJiong Wang 2011c217abccSJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2012c217abccSJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2013c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2014c217abccSJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2015c217abccSJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2016c217abccSJiong Wang /* ashr_reg64_lt32_high packed in delay slot. */ 2017c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2018c217abccSJiong Wang 2019c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2020c217abccSJiong Wang return -EINVAL; 2021c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2022c217abccSJiong Wang 2023c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2024c217abccSJiong Wang return -EINVAL; 2025f43d0f17SJiong Wang } 2026f43d0f17SJiong Wang 2027f43d0f17SJiong Wang return 0; 2028f43d0f17SJiong Wang } 2029f43d0f17SJiong Wang 2030d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2031d9ae7f2bSJakub Kicinski { 2032d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2033d9ae7f2bSJakub Kicinski 2034d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 2035d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2036d9ae7f2bSJakub Kicinski 2037d9ae7f2bSJakub Kicinski return 0; 2038d9ae7f2bSJakub Kicinski } 2039d9ae7f2bSJakub Kicinski 2040d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2041d9ae7f2bSJakub Kicinski { 2042d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2043d9ae7f2bSJakub Kicinski 2044d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 2045d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2046d9ae7f2bSJakub Kicinski 2047d9ae7f2bSJakub Kicinski return 0; 2048d9ae7f2bSJakub Kicinski } 2049d9ae7f2bSJakub Kicinski 2050d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2051d9ae7f2bSJakub Kicinski { 2052d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 2053d9ae7f2bSJakub Kicinski } 2054d9ae7f2bSJakub Kicinski 2055d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2056d9ae7f2bSJakub Kicinski { 2057d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 2058d9ae7f2bSJakub Kicinski } 2059d9ae7f2bSJakub Kicinski 2060d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2061d9ae7f2bSJakub Kicinski { 2062d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 2063d9ae7f2bSJakub Kicinski } 2064d9ae7f2bSJakub Kicinski 2065d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2066d9ae7f2bSJakub Kicinski { 2067d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 2068d9ae7f2bSJakub Kicinski } 2069d9ae7f2bSJakub Kicinski 2070d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2071d9ae7f2bSJakub Kicinski { 2072d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 2073d9ae7f2bSJakub Kicinski } 2074d9ae7f2bSJakub Kicinski 2075d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2076d9ae7f2bSJakub Kicinski { 2077d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 2078d9ae7f2bSJakub Kicinski } 2079d9ae7f2bSJakub Kicinski 2080d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2081d9ae7f2bSJakub Kicinski { 2082d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 2083d9ae7f2bSJakub Kicinski } 2084d9ae7f2bSJakub Kicinski 2085d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2086d9ae7f2bSJakub Kicinski { 2087d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 2088d9ae7f2bSJakub Kicinski } 2089d9ae7f2bSJakub Kicinski 2090d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2091d9ae7f2bSJakub Kicinski { 2092d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 2093d9ae7f2bSJakub Kicinski } 2094d9ae7f2bSJakub Kicinski 2095d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2096d9ae7f2bSJakub Kicinski { 2097d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 2098d9ae7f2bSJakub Kicinski } 2099d9ae7f2bSJakub Kicinski 2100254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2101254ef4d7SJiong Wang { 2102254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 2103254ef4d7SJiong Wang 2104254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 2105254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2106254ef4d7SJiong Wang 2107254ef4d7SJiong Wang return 0; 2108254ef4d7SJiong Wang } 2109254ef4d7SJiong Wang 2110d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2111d9ae7f2bSJakub Kicinski { 2112d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2113d9ae7f2bSJakub Kicinski 2114d9ae7f2bSJakub Kicinski if (!insn->imm) 2115d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 2116d9ae7f2bSJakub Kicinski 2117d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 2118d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 2119d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 2120d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2121d9ae7f2bSJakub Kicinski 2122d9ae7f2bSJakub Kicinski return 0; 2123d9ae7f2bSJakub Kicinski } 2124d9ae7f2bSJakub Kicinski 21253119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 21263119d1fdSJakub Kicinski { 21273119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 21283119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 21293119d1fdSJakub Kicinski 21303119d1fdSJakub Kicinski switch (insn->imm) { 21313119d1fdSJakub Kicinski case 16: 21323119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 21333119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 21343119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 21353119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 21363119d1fdSJakub Kicinski 21373119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 21383119d1fdSJakub Kicinski break; 21393119d1fdSJakub Kicinski case 32: 21403119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 21413119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 21423119d1fdSJakub Kicinski break; 21433119d1fdSJakub Kicinski case 64: 21443119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 21453119d1fdSJakub Kicinski 21463119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 21473119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 21483119d1fdSJakub Kicinski break; 21493119d1fdSJakub Kicinski } 21503119d1fdSJakub Kicinski 21513119d1fdSJakub Kicinski return 0; 21523119d1fdSJakub Kicinski } 21533119d1fdSJakub Kicinski 2154d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2155d9ae7f2bSJakub Kicinski { 21569f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 21579f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 21589f16c8abSJakub Kicinski u8 dst; 21599f16c8abSJakub Kicinski 21609f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 21619f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 21629f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 21639f16c8abSJakub Kicinski 21649f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 21659f16c8abSJakub Kicinski 21669f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 21679f16c8abSJakub Kicinski if (imm_hi == imm_lo) 21689f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 21699f16c8abSJakub Kicinski else 21709f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 2171d9ae7f2bSJakub Kicinski 2172d9ae7f2bSJakub Kicinski return 0; 2173d9ae7f2bSJakub Kicinski } 2174d9ae7f2bSJakub Kicinski 2175d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2176d9ae7f2bSJakub Kicinski { 2177d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 2178d9ae7f2bSJakub Kicinski return 0; 2179d9ae7f2bSJakub Kicinski } 2180d9ae7f2bSJakub Kicinski 2181d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2182d9ae7f2bSJakub Kicinski { 2183d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 2184d9ae7f2bSJakub Kicinski } 2185d9ae7f2bSJakub Kicinski 2186d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2187d9ae7f2bSJakub Kicinski { 2188d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 2189d9ae7f2bSJakub Kicinski } 2190d9ae7f2bSJakub Kicinski 2191d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2192d9ae7f2bSJakub Kicinski { 2193d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 2194d9ae7f2bSJakub Kicinski } 2195d9ae7f2bSJakub Kicinski 2196d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2197d9ae7f2bSJakub Kicinski { 2198d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 21990a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 2200d9ae7f2bSJakub Kicinski } 2201d9ae7f2bSJakub Kicinski 2202d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2203d9ae7f2bSJakub Kicinski { 2204d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 22050a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 2206d9ae7f2bSJakub Kicinski } 2207d9ae7f2bSJakub Kicinski 2208d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2209d9ae7f2bSJakub Kicinski { 2210d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 22110a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 2212d9ae7f2bSJakub Kicinski } 2213d9ae7f2bSJakub Kicinski 2214a82b23fbSJakub Kicinski static int 2215a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2216d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2217a82b23fbSJakub Kicinski { 2218d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2219b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 2220b14157eeSJakub Kicinski true, wrp_lmem_load); 2221a82b23fbSJakub Kicinski } 2222a82b23fbSJakub Kicinski 2223943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2224943c57b9SJakub Kicinski u8 size) 2225d9ae7f2bSJakub Kicinski { 2226bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2227bfddbc8aSJakub Kicinski 2228943c57b9SJakub Kicinski switch (meta->insn.off) { 2229c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 2230c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 2231943c57b9SJakub Kicinski return -EOPNOTSUPP; 2232bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 2233bfddbc8aSJakub Kicinski break; 2234c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 2235c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 2236bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2237bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2238bfddbc8aSJakub Kicinski break; 2239c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 2240c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 2241bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2242bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 2243bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2244943c57b9SJakub Kicinski break; 2245943c57b9SJakub Kicinski default: 2246d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2247943c57b9SJakub Kicinski } 2248943c57b9SJakub Kicinski 2249943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2250d9ae7f2bSJakub Kicinski 2251d9ae7f2bSJakub Kicinski return 0; 2252d9ae7f2bSJakub Kicinski } 2253d9ae7f2bSJakub Kicinski 2254943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2255943c57b9SJakub Kicinski u8 size) 2256d9ae7f2bSJakub Kicinski { 2257b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2258d9ae7f2bSJakub Kicinski 2259943c57b9SJakub Kicinski switch (meta->insn.off) { 2260c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 2261c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 2262c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2263c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2264943c57b9SJakub Kicinski break; 2265c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 2266c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 2267c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2268943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 2269943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2270943c57b9SJakub Kicinski break; 2271943c57b9SJakub Kicinski default: 2272943c57b9SJakub Kicinski return -EOPNOTSUPP; 2273943c57b9SJakub Kicinski } 2274d9ae7f2bSJakub Kicinski 2275943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2276d9ae7f2bSJakub Kicinski 2277d9ae7f2bSJakub Kicinski return 0; 2278d9ae7f2bSJakub Kicinski } 2279d9ae7f2bSJakub Kicinski 22802ca71441SJakub Kicinski static int 22812ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 22822ca71441SJakub Kicinski unsigned int size) 22832ca71441SJakub Kicinski { 22842ca71441SJakub Kicinski swreg tmp_reg; 22852ca71441SJakub Kicinski 22862ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 22872ca71441SJakub Kicinski 22883dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 22893dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 22903dd43c33SJakub Kicinski } 22913dd43c33SJakub Kicinski 22923dd43c33SJakub Kicinski static int 22933dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 22943dd43c33SJakub Kicinski unsigned int size) 22953dd43c33SJakub Kicinski { 22963dd43c33SJakub Kicinski swreg tmp_reg; 22973dd43c33SJakub Kicinski 22983dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 22993dd43c33SJakub Kicinski 23003dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 23013dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 23022ca71441SJakub Kicinski } 23032ca71441SJakub Kicinski 2304be759237SJiong Wang static void 2305be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 2306be759237SJiong Wang struct nfp_insn_meta *meta) 2307be759237SJiong Wang { 2308be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 2309be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 2310be759237SJiong Wang swreg src_base, off; 2311be759237SJiong Wang u8 xfer_num, len; 2312be759237SJiong Wang bool indir; 2313be759237SJiong Wang 2314be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 2315be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 2316be759237SJiong Wang len = range_end - range_start; 2317be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 2318be759237SJiong Wang 2319be759237SJiong Wang indir = len > 8 * REG_WIDTH; 2320be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 2321be759237SJiong Wang if (indir) 2322be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 2323be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 2324be759237SJiong Wang 2325be759237SJiong Wang /* Cache memory into transfer-in registers. */ 2326be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 2327b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 2328be759237SJiong Wang } 2329be759237SJiong Wang 2330be759237SJiong Wang static int 233191ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 233291ff69e8SJiong Wang struct nfp_insn_meta *meta, 233391ff69e8SJiong Wang unsigned int size) 233491ff69e8SJiong Wang { 233591ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 233691ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 233791ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 233891ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 233991ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 234091ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 234191ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 234291ff69e8SJiong Wang 234391ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 234491ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 234591ff69e8SJiong Wang src_lo = reg_xfer(idx); 234691ff69e8SJiong Wang 234791ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 234891ff69e8SJiong Wang if (size > REG_WIDTH - off) { 234991ff69e8SJiong Wang /* Calculate the part in the second register. */ 235091ff69e8SJiong Wang len_lo = REG_WIDTH - off; 235191ff69e8SJiong Wang len_mid = size - len_lo; 235291ff69e8SJiong Wang 235391ff69e8SJiong Wang /* Calculate the part in the third register. */ 235491ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 235591ff69e8SJiong Wang len_mid = REG_WIDTH; 235691ff69e8SJiong Wang } 235791ff69e8SJiong Wang 235891ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 235991ff69e8SJiong Wang 236091ff69e8SJiong Wang if (!len_mid) { 236191ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 236291ff69e8SJiong Wang return 0; 236391ff69e8SJiong Wang } 236491ff69e8SJiong Wang 236591ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 236691ff69e8SJiong Wang 236791ff69e8SJiong Wang if (size <= REG_WIDTH) { 236891ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 236991ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 237091ff69e8SJiong Wang } else { 237191ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 237291ff69e8SJiong Wang 237391ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 237491ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 237591ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 237691ff69e8SJiong Wang REG_WIDTH - len_lo); 237791ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 237891ff69e8SJiong Wang len_lo); 237991ff69e8SJiong Wang } 238091ff69e8SJiong Wang 238191ff69e8SJiong Wang return 0; 238291ff69e8SJiong Wang } 238391ff69e8SJiong Wang 238491ff69e8SJiong Wang static int 2385be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 2386be759237SJiong Wang struct nfp_insn_meta *meta, 2387be759237SJiong Wang unsigned int size) 2388be759237SJiong Wang { 2389be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 2390be759237SJiong Wang u8 dst_gpr, idx; 2391be759237SJiong Wang 2392be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 2393be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 2394be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 2395be759237SJiong Wang dst_lo = reg_both(dst_gpr); 2396be759237SJiong Wang src_lo = reg_xfer(idx); 2397be759237SJiong Wang 2398be759237SJiong Wang if (size < REG_WIDTH) { 2399be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 2400be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2401be759237SJiong Wang } else if (size == REG_WIDTH) { 2402be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2403be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2404be759237SJiong Wang } else { 2405be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 2406be759237SJiong Wang 2407be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2408be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 2409be759237SJiong Wang } 2410be759237SJiong Wang 2411be759237SJiong Wang return 0; 2412be759237SJiong Wang } 2413be759237SJiong Wang 2414be759237SJiong Wang static int 2415be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 2416be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 2417be759237SJiong Wang { 2418be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 2419be759237SJiong Wang 242091ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 2421be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 242291ff69e8SJiong Wang 242391ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 2424be759237SJiong Wang } 2425be759237SJiong Wang 24262ca71441SJakub Kicinski static int 24272ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 24282ca71441SJakub Kicinski unsigned int size) 24292ca71441SJakub Kicinski { 24309879a381SJiong Wang if (meta->ldst_gather_len) 24319879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 24329879a381SJiong Wang 24332ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2434012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 24352ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 24362ca71441SJakub Kicinski else 24372ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 24382ca71441SJakub Kicinski } 24392ca71441SJakub Kicinski 2440be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2441be759237SJiong Wang if (meta->pkt_cache.range_end) { 2442be759237SJiong Wang if (meta->pkt_cache.do_init) 2443be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2444be759237SJiong Wang 2445be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2446be759237SJiong Wang } else { 24472ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2448be759237SJiong Wang } 2449be759237SJiong Wang } 24502ca71441SJakub Kicinski 2451a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2452d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2453d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2454a82b23fbSJakub Kicinski 24553dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 24563dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 24573dd43c33SJakub Kicinski 24582ca71441SJakub Kicinski return -EOPNOTSUPP; 24592ca71441SJakub Kicinski } 24602ca71441SJakub Kicinski 24612ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24622ca71441SJakub Kicinski { 24632ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 24642ca71441SJakub Kicinski } 24652ca71441SJakub Kicinski 24662ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24672ca71441SJakub Kicinski { 24682ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 24692ca71441SJakub Kicinski } 24702ca71441SJakub Kicinski 2471d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2472d9ae7f2bSJakub Kicinski { 24732ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 24742ca71441SJakub Kicinski } 24752ca71441SJakub Kicinski 24762ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24772ca71441SJakub Kicinski { 24782ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2479d9ae7f2bSJakub Kicinski } 2480d9ae7f2bSJakub Kicinski 2481e663fe38SJakub Kicinski static int 2482e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2483e663fe38SJakub Kicinski unsigned int size) 2484d9ae7f2bSJakub Kicinski { 2485e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2486e663fe38SJakub Kicinski swreg off_reg; 2487e663fe38SJakub Kicinski 2488e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2489e663fe38SJakub Kicinski 2490e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2491e663fe38SJakub Kicinski imm, size); 2492e663fe38SJakub Kicinski } 2493e663fe38SJakub Kicinski 2494e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2495e663fe38SJakub Kicinski unsigned int size) 2496e663fe38SJakub Kicinski { 2497e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2498e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2499e663fe38SJakub Kicinski 2500d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2501d9ae7f2bSJakub Kicinski } 2502d9ae7f2bSJakub Kicinski 2503e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2504d9ae7f2bSJakub Kicinski { 2505e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2506e663fe38SJakub Kicinski } 2507e663fe38SJakub Kicinski 2508e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2509e663fe38SJakub Kicinski { 2510e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2511e663fe38SJakub Kicinski } 2512e663fe38SJakub Kicinski 2513e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2514e663fe38SJakub Kicinski { 2515e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2516e663fe38SJakub Kicinski } 2517e663fe38SJakub Kicinski 2518e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2519e663fe38SJakub Kicinski { 2520e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2521e663fe38SJakub Kicinski } 2522e663fe38SJakub Kicinski 2523e663fe38SJakub Kicinski static int 2524e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2525e663fe38SJakub Kicinski unsigned int size) 2526e663fe38SJakub Kicinski { 2527e663fe38SJakub Kicinski swreg off_reg; 2528e663fe38SJakub Kicinski 2529e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2530e663fe38SJakub Kicinski 2531e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2532e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2533e663fe38SJakub Kicinski } 2534e663fe38SJakub Kicinski 2535e663fe38SJakub Kicinski static int 2536ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2537d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2538ee9133a8SJakub Kicinski { 2539d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2540b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2541b14157eeSJakub Kicinski false, wrp_lmem_store); 2542ee9133a8SJakub Kicinski } 2543ee9133a8SJakub Kicinski 2544d985888fSJakub Kicinski static int mem_stx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2545d985888fSJakub Kicinski { 2546d985888fSJakub Kicinski switch (meta->insn.off) { 2547d985888fSJakub Kicinski case offsetof(struct xdp_md, rx_queue_index): 2548d985888fSJakub Kicinski return nfp_queue_select(nfp_prog, meta); 2549d985888fSJakub Kicinski } 2550d985888fSJakub Kicinski 2551d985888fSJakub Kicinski WARN_ON_ONCE(1); /* verifier should have rejected bad accesses */ 2552d985888fSJakub Kicinski return -EOPNOTSUPP; 2553d985888fSJakub Kicinski } 2554d985888fSJakub Kicinski 2555ee9133a8SJakub Kicinski static int 2556e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2557e663fe38SJakub Kicinski unsigned int size) 2558e663fe38SJakub Kicinski { 2559e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2560e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2561e663fe38SJakub Kicinski 2562ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2563d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2564d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2565ee9133a8SJakub Kicinski 2566d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2567d9ae7f2bSJakub Kicinski } 2568d9ae7f2bSJakub Kicinski 2569e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2570e663fe38SJakub Kicinski { 2571e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2572e663fe38SJakub Kicinski } 2573e663fe38SJakub Kicinski 2574e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2575e663fe38SJakub Kicinski { 2576e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2577e663fe38SJakub Kicinski } 2578e663fe38SJakub Kicinski 2579d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2580d9ae7f2bSJakub Kicinski { 2581d985888fSJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) 2582d985888fSJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 2583d985888fSJakub Kicinski return mem_stx_xdp(nfp_prog, meta); 2584e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2585e663fe38SJakub Kicinski } 25862ca71441SJakub Kicinski 2587e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2588e663fe38SJakub Kicinski { 2589e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2590d9ae7f2bSJakub Kicinski } 2591d9ae7f2bSJakub Kicinski 2592dcb0c27fSJakub Kicinski static int 2593dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2594dcb0c27fSJakub Kicinski { 2595dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2596dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 259741aed09cSJakub Kicinski unsigned int full_add, out; 259841aed09cSJakub Kicinski swreg addra, addrb, off; 2599dcb0c27fSJakub Kicinski 2600dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2601dcb0c27fSJakub Kicinski 260241aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 260341aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 260441aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 260541aed09cSJakub Kicinski * code for both. 260641aed09cSJakub Kicinski */ 260741aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 260841aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 260941aed09cSJakub Kicinski 261041aed09cSJakub Kicinski if (meta->insn.off) { 261141aed09cSJakub Kicinski out += 2; 261241aed09cSJakub Kicinski full_add += 2; 261341aed09cSJakub Kicinski } 261441aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 261541aed09cSJakub Kicinski out += 3; 261641aed09cSJakub Kicinski full_add += 3; 261741aed09cSJakub Kicinski } 261841aed09cSJakub Kicinski if (meta->xadd_over_16bit) 261941aed09cSJakub Kicinski out += 2 + is64; 262041aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 262141aed09cSJakub Kicinski out += 5; 262241aed09cSJakub Kicinski full_add += 5; 262341aed09cSJakub Kicinski } 262441aed09cSJakub Kicinski 262541aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 262641aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 262741aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 262841aed09cSJakub Kicinski 262941aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 263041aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 263141aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 263241aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 263341aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 263441aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 263541aed09cSJakub Kicinski /* defer for add */ 263641aed09cSJakub Kicinski } 263741aed09cSJakub Kicinski 2638dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2639dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2640dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2641dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2642dcb0c27fSJakub Kicinski } else { 2643dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2644dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2645dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2646dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2647dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2648dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2649dcb0c27fSJakub Kicinski } 2650dcb0c27fSJakub Kicinski 265141aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 265241aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 265341aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 265441aed09cSJakub Kicinski 2655dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2656dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2657dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2658dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2659dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2660dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2661b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2662dcb0c27fSJakub Kicinski 266341aed09cSJakub Kicinski if (meta->xadd_over_16bit) 266441aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 266541aed09cSJakub Kicinski } 266641aed09cSJakub Kicinski 266741aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 266841aed09cSJakub Kicinski return -EINVAL; 266941aed09cSJakub Kicinski 267041aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 267141aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 267241aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 267341aed09cSJakub Kicinski addra, addrb, is64 << 2, 267441aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 267541aed09cSJakub Kicinski 267641aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 267741aed09cSJakub Kicinski if (is64) 267841aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 267941aed09cSJakub Kicinski } 268041aed09cSJakub Kicinski 268141aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 268241aed09cSJakub Kicinski return -EINVAL; 268341aed09cSJakub Kicinski 2684dcb0c27fSJakub Kicinski return 0; 2685dcb0c27fSJakub Kicinski } 2686dcb0c27fSJakub Kicinski 2687dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2688dcb0c27fSJakub Kicinski { 2689dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2690dcb0c27fSJakub Kicinski } 2691dcb0c27fSJakub Kicinski 2692dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2693dcb0c27fSJakub Kicinski { 2694dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2695dcb0c27fSJakub Kicinski } 2696dcb0c27fSJakub Kicinski 2697d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2698d9ae7f2bSJakub Kicinski { 2699d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2700d9ae7f2bSJakub Kicinski 2701d9ae7f2bSJakub Kicinski return 0; 2702d9ae7f2bSJakub Kicinski } 2703d9ae7f2bSJakub Kicinski 2704d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2705d9ae7f2bSJakub Kicinski { 2706d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2707d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2708b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2709b3f868dfSJakub Kicinski 2710b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2711b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2712d9ae7f2bSJakub Kicinski 2713d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2714d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2715d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2716d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2717d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2718d9ae7f2bSJakub Kicinski } 2719d9ae7f2bSJakub Kicinski 2720d9ae7f2bSJakub Kicinski if (imm >> 32) { 2721d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2722d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2723d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2724d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2725d9ae7f2bSJakub Kicinski } 2726d9ae7f2bSJakub Kicinski 2727d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2728d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2729d9ae7f2bSJakub Kicinski 2730d9ae7f2bSJakub Kicinski return 0; 2731d9ae7f2bSJakub Kicinski } 2732d9ae7f2bSJakub Kicinski 2733d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2734d9ae7f2bSJakub Kicinski { 2735d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2736d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2737b3f868dfSJakub Kicinski swreg tmp_reg; 2738d9ae7f2bSJakub Kicinski 2739d9ae7f2bSJakub Kicinski if (!imm) { 2740d9ae7f2bSJakub Kicinski meta->skip = true; 2741d9ae7f2bSJakub Kicinski return 0; 2742d9ae7f2bSJakub Kicinski } 2743d9ae7f2bSJakub Kicinski 2744d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2745d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2746d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2747d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2748d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2749d9ae7f2bSJakub Kicinski } 2750d9ae7f2bSJakub Kicinski 2751d9ae7f2bSJakub Kicinski if (imm >> 32) { 2752d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2753d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2754d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2755d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2756d9ae7f2bSJakub Kicinski } 2757d9ae7f2bSJakub Kicinski 2758d9ae7f2bSJakub Kicinski return 0; 2759d9ae7f2bSJakub Kicinski } 2760d9ae7f2bSJakub Kicinski 2761d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2762d9ae7f2bSJakub Kicinski { 2763d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2764d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2765b3f868dfSJakub Kicinski swreg tmp_reg; 2766d9ae7f2bSJakub Kicinski 2767d9ae7f2bSJakub Kicinski if (!imm) { 2768d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2769d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2770d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 277182837370SJakub Kicinski return 0; 2772d9ae7f2bSJakub Kicinski } 2773d9ae7f2bSJakub Kicinski 2774d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2775d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2776d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2777d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2778d9ae7f2bSJakub Kicinski 2779d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2780d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2781d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2782d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2783d9ae7f2bSJakub Kicinski 2784d9ae7f2bSJakub Kicinski return 0; 2785d9ae7f2bSJakub Kicinski } 2786d9ae7f2bSJakub Kicinski 2787d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2788d9ae7f2bSJakub Kicinski { 2789d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2790d9ae7f2bSJakub Kicinski 2791d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2792d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2793d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2794d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2795d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2796d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2797d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2798d9ae7f2bSJakub Kicinski 2799d9ae7f2bSJakub Kicinski return 0; 2800d9ae7f2bSJakub Kicinski } 2801d9ae7f2bSJakub Kicinski 2802d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2803d9ae7f2bSJakub Kicinski { 2804d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2805d9ae7f2bSJakub Kicinski } 2806d9ae7f2bSJakub Kicinski 2807d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2808d9ae7f2bSJakub Kicinski { 2809d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2810d9ae7f2bSJakub Kicinski } 2811d9ae7f2bSJakub Kicinski 28122cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 28132cb230bdSJakub Kicinski { 28142cb230bdSJakub Kicinski switch (meta->insn.imm) { 28150d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 28160d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 281777a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 281844d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 2819bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 2820fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 2821df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 2822df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 28239816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 28249816dd35SJakub Kicinski return nfp_perf_event_output(nfp_prog, meta); 28252cb230bdSJakub Kicinski default: 28262cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 28272cb230bdSJakub Kicinski return -EOPNOTSUPP; 28282cb230bdSJakub Kicinski } 28292cb230bdSJakub Kicinski } 28302cb230bdSJakub Kicinski 2831d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2832d9ae7f2bSJakub Kicinski { 2833e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2834d9ae7f2bSJakub Kicinski 2835d9ae7f2bSJakub Kicinski return 0; 2836d9ae7f2bSJakub Kicinski } 2837d9ae7f2bSJakub Kicinski 2838d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2839d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2840d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2841d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2842d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2843d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2844d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2845d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2846d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2847d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2848d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2849d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2850d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2851254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2852991f5b36SJiong Wang [BPF_ALU64 | BPF_LSH | BPF_X] = shl_reg64, 2853d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2854991f5b36SJiong Wang [BPF_ALU64 | BPF_RSH | BPF_X] = shr_reg64, 2855d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2856c217abccSJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_X] = ashr_reg64, 2857f43d0f17SJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_K] = ashr_imm64, 2858d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2859d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2860d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2861d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2862d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2863d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2864d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2865d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2866d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2867d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2868d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2869d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2870254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2871d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 28723119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2873d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2874d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2875d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2876d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2877d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2878d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2879d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 28802ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 28812ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2882d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 28832ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2884e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2885e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2886d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2887e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2888dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 2889dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 2890e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2891e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2892e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2893e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2894d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2895d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 289661dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = cmp_imm, 289761dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = cmp_imm, 289861dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_K] = cmp_imm, 289961dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_K] = cmp_imm, 290061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_K] = cmp_imm, 290161dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_K] = cmp_imm, 290261dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_K] = cmp_imm, 290361dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_K] = cmp_imm, 2904d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2905d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2906d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 290761dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = cmp_reg, 290861dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = cmp_reg, 290961dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_X] = cmp_reg, 291061dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_X] = cmp_reg, 291161dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_X] = cmp_reg, 291261dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_X] = cmp_reg, 291361dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_X] = cmp_reg, 291461dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_X] = cmp_reg, 2915d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2916d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 29172cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2918d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2919d9ae7f2bSJakub Kicinski }; 2920d9ae7f2bSJakub Kicinski 2921d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2922d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2923d9ae7f2bSJakub Kicinski { 29245b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2925854dc87dSJiong Wang u32 idx, br_idx; 2926d9ae7f2bSJakub Kicinski 2927854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2928d9ae7f2bSJakub Kicinski if (meta->skip) 2929d9ae7f2bSJakub Kicinski continue; 29302cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 29312cb230bdSJakub Kicinski continue; 2932d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2933d9ae7f2bSJakub Kicinski continue; 2934d9ae7f2bSJakub Kicinski 29355b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 29362314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 29375b674140SJiong Wang else 29382314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2939854dc87dSJiong Wang 2940d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2941d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2942d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2943d9ae7f2bSJakub Kicinski return -ELOOP; 2944d9ae7f2bSJakub Kicinski } 2945d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 29462314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 29472314fe9eSJakub Kicinski RELO_BR_REL) 2948d9ae7f2bSJakub Kicinski continue; 2949d9ae7f2bSJakub Kicinski 29505b674140SJiong Wang if (!meta->jmp_dst) { 29515b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2952d9ae7f2bSJakub Kicinski return -ELOOP; 2953d9ae7f2bSJakub Kicinski } 2954d9ae7f2bSJakub Kicinski 29555b674140SJiong Wang jmp_dst = meta->jmp_dst; 2956854dc87dSJiong Wang 29575b674140SJiong Wang if (jmp_dst->skip) { 2958d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2959d9ae7f2bSJakub Kicinski return -ELOOP; 2960d9ae7f2bSJakub Kicinski } 2961d9ae7f2bSJakub Kicinski 29622314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2963d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2964d9ae7f2bSJakub Kicinski continue; 29655b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2966d9ae7f2bSJakub Kicinski } 2967d9ae7f2bSJakub Kicinski } 2968d9ae7f2bSJakub Kicinski 2969d9ae7f2bSJakub Kicinski return 0; 2970d9ae7f2bSJakub Kicinski } 2971d9ae7f2bSJakub Kicinski 2972d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2973d9ae7f2bSJakub Kicinski { 297418e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 297518e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 297618e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2977d9ae7f2bSJakub Kicinski } 2978d9ae7f2bSJakub Kicinski 2979d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2980d9ae7f2bSJakub Kicinski { 2981d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2982d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2983d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2984d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2985d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2986d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2987d9ae7f2bSJakub Kicinski * 2988d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2989d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2990d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2991d9ae7f2bSJakub Kicinski * packets up the stack. 2992d9ae7f2bSJakub Kicinski */ 2993d9ae7f2bSJakub Kicinski /* Target for aborts */ 2994d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2995d9ae7f2bSJakub Kicinski 2996e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2997d9ae7f2bSJakub Kicinski 2998c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2999d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 3000d9ae7f2bSJakub Kicinski 3001d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3002d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3003d9ae7f2bSJakub Kicinski 3004d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 3005d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 3006d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3007c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3008d9ae7f2bSJakub Kicinski 3009d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 3010d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 3011d9ae7f2bSJakub Kicinski 3012d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3013d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 3014d9ae7f2bSJakub Kicinski 3015d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3016d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 3017d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3018d9ae7f2bSJakub Kicinski 3019d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3020d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3021d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 3022d9ae7f2bSJakub Kicinski 3023e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3024d9ae7f2bSJakub Kicinski 3025d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3026d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 3027d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3028d9ae7f2bSJakub Kicinski } 3029d9ae7f2bSJakub Kicinski 3030d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 3031d9ae7f2bSJakub Kicinski { 3032d9ae7f2bSJakub Kicinski /* XDP return codes: 3033d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 3034d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 3035d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 3036d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 3037d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 3038d9ae7f2bSJakub Kicinski */ 3039d9ae7f2bSJakub Kicinski /* Target for aborts */ 3040d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3041d9ae7f2bSJakub Kicinski 3042e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3043d9ae7f2bSJakub Kicinski 3044c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3045d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 3046d9ae7f2bSJakub Kicinski 3047d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3048d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3049d9ae7f2bSJakub Kicinski 3050d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 3051d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 3052d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3053d9ae7f2bSJakub Kicinski 3054d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 3055d9ae7f2bSJakub Kicinski 3056d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3057d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 3058d9ae7f2bSJakub Kicinski 3059d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3060d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3061d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3062d9ae7f2bSJakub Kicinski 3063e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3064d9ae7f2bSJakub Kicinski 3065c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3066d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3067d9ae7f2bSJakub Kicinski } 3068d9ae7f2bSJakub Kicinski 3069d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 3070d9ae7f2bSJakub Kicinski { 3071012bb8a8SJakub Kicinski switch (nfp_prog->type) { 3072012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 3073d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 3074d9ae7f2bSJakub Kicinski break; 3075012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 3076d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 3077d9ae7f2bSJakub Kicinski break; 3078012bb8a8SJakub Kicinski default: 3079012bb8a8SJakub Kicinski WARN_ON(1); 3080d9ae7f2bSJakub Kicinski } 3081d9ae7f2bSJakub Kicinski } 3082d9ae7f2bSJakub Kicinski 3083d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 3084d9ae7f2bSJakub Kicinski { 3085d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3086ff42bb9fSJakub Kicinski int err; 3087d9ae7f2bSJakub Kicinski 3088d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 3089d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3090d9ae7f2bSJakub Kicinski return nfp_prog->error; 3091d9ae7f2bSJakub Kicinski 3092d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3093d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 3094d9ae7f2bSJakub Kicinski 3095d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 3096d9ae7f2bSJakub Kicinski 3097d9ae7f2bSJakub Kicinski if (meta->skip) { 3098d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3099d9ae7f2bSJakub Kicinski continue; 3100d9ae7f2bSJakub Kicinski } 3101d9ae7f2bSJakub Kicinski 3102d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 3103d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 3104d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 3105d9ae7f2bSJakub Kicinski if (!cb) 3106d9ae7f2bSJakub Kicinski return -ENOENT; 3107d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 3108d9ae7f2bSJakub Kicinski if (err) 3109d9ae7f2bSJakub Kicinski return err; 3110e8a4796eSJakub Kicinski if (nfp_prog->error) 3111e8a4796eSJakub Kicinski return nfp_prog->error; 3112d9ae7f2bSJakub Kicinski 3113d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3114d9ae7f2bSJakub Kicinski } 3115d9ae7f2bSJakub Kicinski 3116854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 3117854dc87dSJiong Wang 3118d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 3119d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3120d9ae7f2bSJakub Kicinski return nfp_prog->error; 3121d9ae7f2bSJakub Kicinski 3122ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 31231c03e03fSJakub Kicinski if (nfp_prog->error) 31241c03e03fSJakub Kicinski return nfp_prog->error; 31251c03e03fSJakub Kicinski 3126d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 3127d9ae7f2bSJakub Kicinski } 3128d9ae7f2bSJakub Kicinski 3129d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 3130d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 3131d9ae7f2bSJakub Kicinski { 3132d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3133d9ae7f2bSJakub Kicinski 3134d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3135d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 3136d9ae7f2bSJakub Kicinski 3137d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 3138d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 3139d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 3140d9ae7f2bSJakub Kicinski continue; 3141d9ae7f2bSJakub Kicinski 3142d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 3143d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 3144d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 3145d9ae7f2bSJakub Kicinski meta->skip = true; 3146d9ae7f2bSJakub Kicinski 3147d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 3148d9ae7f2bSJakub Kicinski if (!meta->skip) 3149d9ae7f2bSJakub Kicinski return; 3150d9ae7f2bSJakub Kicinski } 3151d9ae7f2bSJakub Kicinski } 3152d9ae7f2bSJakub Kicinski 31536c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 31546c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 31556c59500cSJakub Kicinski */ 31566c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 31576c59500cSJakub Kicinski { 31586c59500cSJakub Kicinski struct nfp_insn_meta *meta; 31596c59500cSJakub Kicinski 31606c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 31616c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 31626c59500cSJakub Kicinski 31636c59500cSJakub Kicinski if (meta->skip) 31646c59500cSJakub Kicinski continue; 31656c59500cSJakub Kicinski 31666c59500cSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_ALU && 31677bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_ALU64 && 31687bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_JMP) 31696c59500cSJakub Kicinski continue; 31706c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 31716c59500cSJakub Kicinski continue; 31726c59500cSJakub Kicinski if (insn.imm >= 0) 31736c59500cSJakub Kicinski continue; 31746c59500cSJakub Kicinski 31757bdc97beSJakub Kicinski if (BPF_CLASS(insn.code) == BPF_JMP) { 31767bdc97beSJakub Kicinski switch (BPF_OP(insn.code)) { 31777bdc97beSJakub Kicinski case BPF_JGE: 31787bdc97beSJakub Kicinski case BPF_JSGE: 31797bdc97beSJakub Kicinski case BPF_JLT: 31807bdc97beSJakub Kicinski case BPF_JSLT: 31817bdc97beSJakub Kicinski meta->jump_neg_op = true; 31827bdc97beSJakub Kicinski break; 31837bdc97beSJakub Kicinski default: 31847bdc97beSJakub Kicinski continue; 31857bdc97beSJakub Kicinski } 31867bdc97beSJakub Kicinski } else { 31876c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 31886c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 31896c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 31906c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 31916c59500cSJakub Kicinski else 31926c59500cSJakub Kicinski continue; 31936c59500cSJakub Kicinski 31946c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 31957bdc97beSJakub Kicinski } 31966c59500cSJakub Kicinski 31976c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 31986c59500cSJakub Kicinski } 31996c59500cSJakub Kicinski } 32006c59500cSJakub Kicinski 3201d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 3202d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 3203d9ae7f2bSJakub Kicinski { 3204d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3205d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 3206d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 3207d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 3208d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 3209d9ae7f2bSJakub Kicinski }; 3210d9ae7f2bSJakub Kicinski 3211d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3212d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 3213d9ae7f2bSJakub Kicinski 3214d9ae7f2bSJakub Kicinski insn = meta1->insn; 3215d9ae7f2bSJakub Kicinski next = meta2->insn; 3216d9ae7f2bSJakub Kicinski 3217d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3218d9ae7f2bSJakub Kicinski continue; 3219d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3220d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3221d9ae7f2bSJakub Kicinski continue; 3222d9ae7f2bSJakub Kicinski 3223d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 3224d9ae7f2bSJakub Kicinski continue; 3225d9ae7f2bSJakub Kicinski 3226d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 3227d9ae7f2bSJakub Kicinski continue; 3228d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 3229d9ae7f2bSJakub Kicinski continue; 3230d9ae7f2bSJakub Kicinski 3231d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 3232d9ae7f2bSJakub Kicinski continue; 3233d9ae7f2bSJakub Kicinski 32341266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 32351266f5d6SJiong Wang continue; 32361266f5d6SJiong Wang 3237d9ae7f2bSJakub Kicinski meta2->skip = true; 3238d9ae7f2bSJakub Kicinski } 3239d9ae7f2bSJakub Kicinski } 3240d9ae7f2bSJakub Kicinski 3241d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 3242d9ae7f2bSJakub Kicinski { 3243d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 3244d9ae7f2bSJakub Kicinski 3245d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 3246d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 3247d9ae7f2bSJakub Kicinski 3248d9ae7f2bSJakub Kicinski insn = meta1->insn; 3249d9ae7f2bSJakub Kicinski next1 = meta2->insn; 3250d9ae7f2bSJakub Kicinski next2 = meta3->insn; 3251d9ae7f2bSJakub Kicinski 3252d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3253d9ae7f2bSJakub Kicinski continue; 3254d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3255d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3256d9ae7f2bSJakub Kicinski continue; 3257d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 3258d9ae7f2bSJakub Kicinski continue; 3259d9ae7f2bSJakub Kicinski 3260d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 3261d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 3262d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 3263d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 3264d9ae7f2bSJakub Kicinski continue; 3265d9ae7f2bSJakub Kicinski 3266d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 3267d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 3268d9ae7f2bSJakub Kicinski continue; 3269d9ae7f2bSJakub Kicinski 3270d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 3271d9ae7f2bSJakub Kicinski continue; 3272d9ae7f2bSJakub Kicinski 327329fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 327429fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 327529fe46efSJiong Wang continue; 327629fe46efSJiong Wang 3277d9ae7f2bSJakub Kicinski meta2->skip = true; 3278d9ae7f2bSJakub Kicinski meta3->skip = true; 3279d9ae7f2bSJakub Kicinski } 3280d9ae7f2bSJakub Kicinski } 3281d9ae7f2bSJakub Kicinski 32826bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 32836bc7103cSJiong Wang * 32846bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 32856bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 32866bc7103cSJiong Wang * 32876bc7103cSJiong Wang * The destination register of load and source register of store should 32886bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 32896bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 32906bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 32916bc7103cSJiong Wang */ 32926bc7103cSJiong Wang static bool 32936bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 32946bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 32956bc7103cSJiong Wang { 32966bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 32976bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 32986bc7103cSJiong Wang 32996bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 33006bc7103cSJiong Wang return false; 33016bc7103cSJiong Wang 3302cc0dff6dSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET && 3303cc0dff6dSJiong Wang ld_meta->ptr.type != PTR_TO_MAP_VALUE) 33046bc7103cSJiong Wang return false; 33056bc7103cSJiong Wang 33066bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 33076bc7103cSJiong Wang return false; 33086bc7103cSJiong Wang 33096bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 33106bc7103cSJiong Wang return false; 33116bc7103cSJiong Wang 33126bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 33136bc7103cSJiong Wang return false; 33146bc7103cSJiong Wang 33156bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 33166bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 33176bc7103cSJiong Wang return false; 33186bc7103cSJiong Wang 33196bc7103cSJiong Wang return true; 33206bc7103cSJiong Wang } 33216bc7103cSJiong Wang 33226bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 33236bc7103cSJiong Wang * 33246bc7103cSJiong Wang * - Their address base registers are the same. 33256bc7103cSJiong Wang * - Their address offsets are in the same order. 33266bc7103cSJiong Wang * - They operate at the same memory width. 33276bc7103cSJiong Wang * - There is no jump into the middle of them. 33286bc7103cSJiong Wang */ 33296bc7103cSJiong Wang static bool 33306bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 33316bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 33326bc7103cSJiong Wang struct bpf_insn *prev_ld, 33336bc7103cSJiong Wang struct bpf_insn *prev_st) 33346bc7103cSJiong Wang { 33356bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 33366bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 33376bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 33386bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 33396bc7103cSJiong Wang 33406bc7103cSJiong Wang /* This pair is the start pair. */ 33416bc7103cSJiong Wang if (!prev_ld) 33426bc7103cSJiong Wang return true; 33436bc7103cSJiong Wang 33446bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 33456bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 33466bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 33476bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 33486bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 33496bc7103cSJiong Wang prev_ld_off = prev_ld->off; 33506bc7103cSJiong Wang prev_st_off = prev_st->off; 33516bc7103cSJiong Wang 33526bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 33536bc7103cSJiong Wang return false; 33546bc7103cSJiong Wang 33556bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 33566bc7103cSJiong Wang return false; 33576bc7103cSJiong Wang 33586bc7103cSJiong Wang if (curr_size != prev_size) 33596bc7103cSJiong Wang return false; 33606bc7103cSJiong Wang 33616bc7103cSJiong Wang /* There is jump to the head of this pair. */ 33626bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 33636bc7103cSJiong Wang return false; 33646bc7103cSJiong Wang 33656bc7103cSJiong Wang /* Both in ascending order. */ 33666bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 33676bc7103cSJiong Wang prev_st_off + prev_size == st->off) 33686bc7103cSJiong Wang return true; 33696bc7103cSJiong Wang 33706bc7103cSJiong Wang /* Both in descending order. */ 33716bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 33726bc7103cSJiong Wang st->off + curr_size == prev_st_off) 33736bc7103cSJiong Wang return true; 33746bc7103cSJiong Wang 33756bc7103cSJiong Wang return false; 33766bc7103cSJiong Wang } 33776bc7103cSJiong Wang 33786bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 33796bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 33806bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 33816bc7103cSJiong Wang * as an memory copy. 33826bc7103cSJiong Wang */ 33836bc7103cSJiong Wang static bool 33846bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 33856bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 33866bc7103cSJiong Wang { 33876bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 33886bc7103cSJiong Wang 33896bc7103cSJiong Wang /* Different pointer types does not overlap. */ 33906bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 33916bc7103cSJiong Wang return false; 33926bc7103cSJiong Wang 33936bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 33946bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 33956bc7103cSJiong Wang return true; 33966bc7103cSJiong Wang 33976bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 33986bc7103cSJiong Wang * base register. 33996bc7103cSJiong Wang */ 34006bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 34016bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 34026bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 34036bc7103cSJiong Wang 34046bc7103cSJiong Wang /* Ascending order cross. */ 34056bc7103cSJiong Wang if (ld_off > head_ld_off && 34066bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 34076bc7103cSJiong Wang return true; 34086bc7103cSJiong Wang 34096bc7103cSJiong Wang /* Descending order cross. */ 34106bc7103cSJiong Wang if (ld_off < head_ld_off && 34116bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 34126bc7103cSJiong Wang return true; 34136bc7103cSJiong Wang 34146bc7103cSJiong Wang return false; 34156bc7103cSJiong Wang } 34166bc7103cSJiong Wang 34176bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 34186bc7103cSJiong Wang * 34196bc7103cSJiong Wang * load R, [regA + offA] 34206bc7103cSJiong Wang * store [regB + offB], R 34216bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 34226bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 34236bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 34246bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 34256bc7103cSJiong Wang * ... 34266bc7103cSJiong Wang * 34276bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 34286bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 34296bc7103cSJiong Wang */ 34306bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 34316bc7103cSJiong Wang { 34326bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 34336bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 34346bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 34356bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 34366bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 34376bc7103cSJiong Wang u8 count = 0; 34386bc7103cSJiong Wang 34396bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 34406bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 34416bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 34426bc7103cSJiong Wang 34436bc7103cSJiong Wang /* Reset record status if any of the following if true: 34446bc7103cSJiong Wang * - The current insn pair is not load/store. 34456bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 34466bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 34476bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 34486bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 34496bc7103cSJiong Wang * single NFP CPP command can transfer. 34506bc7103cSJiong Wang */ 34516bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 34526bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 34536bc7103cSJiong Wang prev_st) || 34546bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 34556bc7103cSJiong Wang head_st_meta) || 34566bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 34576bc7103cSJiong Wang if (!count) 34586bc7103cSJiong Wang continue; 34596bc7103cSJiong Wang 34606bc7103cSJiong Wang if (count > 1) { 34616bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 34626bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 34636bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 34646bc7103cSJiong Wang 34656bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 34666bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 34676bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 34686bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 34696bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 34706bc7103cSJiong Wang } 34716bc7103cSJiong Wang 34726bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 34736bc7103cSJiong Wang head_st_meta->skip = true; 34746bc7103cSJiong Wang } else { 34756bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 34766bc7103cSJiong Wang } 34776bc7103cSJiong Wang 34786bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 34796bc7103cSJiong Wang * could serve as the new head of the the next chain. 34806bc7103cSJiong Wang */ 34816bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 34826bc7103cSJiong Wang head_ld_meta = meta1; 34836bc7103cSJiong Wang head_st_meta = meta2; 34846bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 34856bc7103cSJiong Wang BPF_LDST_BYTES(ld); 34866bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 34876bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 34886bc7103cSJiong Wang prev_ld = ld; 34896bc7103cSJiong Wang prev_st = st; 34906bc7103cSJiong Wang count = 1; 34916bc7103cSJiong Wang } else { 34926bc7103cSJiong Wang head_ld_meta = NULL; 34936bc7103cSJiong Wang head_st_meta = NULL; 34946bc7103cSJiong Wang prev_ld = NULL; 34956bc7103cSJiong Wang prev_st = NULL; 34966bc7103cSJiong Wang count = 0; 34976bc7103cSJiong Wang } 34986bc7103cSJiong Wang 34996bc7103cSJiong Wang continue; 35006bc7103cSJiong Wang } 35016bc7103cSJiong Wang 35026bc7103cSJiong Wang if (!head_ld_meta) { 35036bc7103cSJiong Wang head_ld_meta = meta1; 35046bc7103cSJiong Wang head_st_meta = meta2; 35056bc7103cSJiong Wang } else { 35066bc7103cSJiong Wang meta1->skip = true; 35076bc7103cSJiong Wang meta2->skip = true; 35086bc7103cSJiong Wang } 35096bc7103cSJiong Wang 35106bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 35116bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 35126bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 35136bc7103cSJiong Wang prev_ld = ld; 35146bc7103cSJiong Wang prev_st = st; 35156bc7103cSJiong Wang count++; 35166bc7103cSJiong Wang } 35176bc7103cSJiong Wang } 35186bc7103cSJiong Wang 351987b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 352087b10ecdSJiong Wang { 352187b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 352287b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 352387b10ecdSJiong Wang bool cache_avail = false; 352487b10ecdSJiong Wang struct bpf_insn *insn; 352587b10ecdSJiong Wang s32 range_ptr_off = 0; 352687b10ecdSJiong Wang u32 range_ptr_id = 0; 352787b10ecdSJiong Wang 352887b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 352987b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 353087b10ecdSJiong Wang cache_avail = false; 353187b10ecdSJiong Wang 353287b10ecdSJiong Wang if (meta->skip) 353387b10ecdSJiong Wang continue; 353487b10ecdSJiong Wang 353587b10ecdSJiong Wang insn = &meta->insn; 353687b10ecdSJiong Wang 353787b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 353887b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 353987b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 354087b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 354187b10ecdSJiong Wang cache_avail = false; 354287b10ecdSJiong Wang continue; 354387b10ecdSJiong Wang } 354487b10ecdSJiong Wang 354587b10ecdSJiong Wang if (!is_mbpf_load(meta)) 354687b10ecdSJiong Wang continue; 354787b10ecdSJiong Wang 354887b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 354987b10ecdSJiong Wang cache_avail = false; 355087b10ecdSJiong Wang continue; 355187b10ecdSJiong Wang } 355287b10ecdSJiong Wang 355387b10ecdSJiong Wang if (!cache_avail) { 355487b10ecdSJiong Wang cache_avail = true; 355587b10ecdSJiong Wang if (range_node) 355687b10ecdSJiong Wang goto end_current_then_start_new; 355787b10ecdSJiong Wang goto start_new; 355887b10ecdSJiong Wang } 355987b10ecdSJiong Wang 356087b10ecdSJiong Wang /* Check ID to make sure two reads share the same 356187b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 356287b10ecdSJiong Wang * to make sure they also share the same constant 356387b10ecdSJiong Wang * offset. 356487b10ecdSJiong Wang * 356587b10ecdSJiong Wang * OFFs don't really need to be the same, because they 356687b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 356787b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 356887b10ecdSJiong Wang * offsets against original packet pointer. We don't 356987b10ecdSJiong Wang * support this. 357087b10ecdSJiong Wang */ 357187b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 357287b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 357387b10ecdSJiong Wang s16 new_start = range_start; 357487b10ecdSJiong Wang s16 end, off = insn->off; 357587b10ecdSJiong Wang s16 new_end = range_end; 357687b10ecdSJiong Wang bool changed = false; 357787b10ecdSJiong Wang 357887b10ecdSJiong Wang if (off < range_start) { 357987b10ecdSJiong Wang new_start = off; 358087b10ecdSJiong Wang changed = true; 358187b10ecdSJiong Wang } 358287b10ecdSJiong Wang 358387b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 358487b10ecdSJiong Wang if (end > range_end) { 358587b10ecdSJiong Wang new_end = end; 358687b10ecdSJiong Wang changed = true; 358787b10ecdSJiong Wang } 358887b10ecdSJiong Wang 358987b10ecdSJiong Wang if (!changed) 359087b10ecdSJiong Wang continue; 359187b10ecdSJiong Wang 359287b10ecdSJiong Wang if (new_end - new_start <= 64) { 359387b10ecdSJiong Wang /* Install new range. */ 359487b10ecdSJiong Wang range_start = new_start; 359587b10ecdSJiong Wang range_end = new_end; 359687b10ecdSJiong Wang continue; 359787b10ecdSJiong Wang } 359887b10ecdSJiong Wang } 359987b10ecdSJiong Wang 360087b10ecdSJiong Wang end_current_then_start_new: 360187b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 360287b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 360387b10ecdSJiong Wang start_new: 360487b10ecdSJiong Wang range_node = meta; 360587b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 360687b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 360787b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 360887b10ecdSJiong Wang range_start = insn->off; 360987b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 361087b10ecdSJiong Wang } 361187b10ecdSJiong Wang 361287b10ecdSJiong Wang if (range_node) { 361387b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 361487b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 361587b10ecdSJiong Wang } 361687b10ecdSJiong Wang 361787b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 361887b10ecdSJiong Wang if (meta->skip) 361987b10ecdSJiong Wang continue; 362087b10ecdSJiong Wang 362187b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 362287b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 362387b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 362487b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 362587b10ecdSJiong Wang } else { 362687b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 362787b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 362887b10ecdSJiong Wang } 362987b10ecdSJiong Wang } 363087b10ecdSJiong Wang } 363187b10ecdSJiong Wang } 363287b10ecdSJiong Wang 3633d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 3634d9ae7f2bSJakub Kicinski { 3635d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 3636d9ae7f2bSJakub Kicinski 36376c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 3638d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 3639d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 36406bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 364187b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 3642d9ae7f2bSJakub Kicinski 3643d9ae7f2bSJakub Kicinski return 0; 3644d9ae7f2bSJakub Kicinski } 3645d9ae7f2bSJakub Kicinski 3646b4264c96SJakub Kicinski static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) 3647b4264c96SJakub Kicinski { 3648b4264c96SJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3649b4264c96SJakub Kicinski struct nfp_bpf_map *nfp_map; 3650b4264c96SJakub Kicinski struct bpf_map *map; 3651b4264c96SJakub Kicinski 3652b4264c96SJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3653b4264c96SJakub Kicinski if (meta1->skip || meta2->skip) 3654b4264c96SJakub Kicinski continue; 3655b4264c96SJakub Kicinski 3656b4264c96SJakub Kicinski if (meta1->insn.code != (BPF_LD | BPF_IMM | BPF_DW) || 3657b4264c96SJakub Kicinski meta1->insn.src_reg != BPF_PSEUDO_MAP_FD) 3658b4264c96SJakub Kicinski continue; 3659b4264c96SJakub Kicinski 3660b4264c96SJakub Kicinski map = (void *)(unsigned long)((u32)meta1->insn.imm | 3661b4264c96SJakub Kicinski (u64)meta2->insn.imm << 32); 3662b4264c96SJakub Kicinski if (bpf_map_offload_neutral(map)) 3663b4264c96SJakub Kicinski continue; 3664b4264c96SJakub Kicinski nfp_map = map_to_offmap(map)->dev_priv; 3665b4264c96SJakub Kicinski 3666b4264c96SJakub Kicinski meta1->insn.imm = nfp_map->tid; 3667b4264c96SJakub Kicinski meta2->insn.imm = 0; 3668b4264c96SJakub Kicinski } 3669b4264c96SJakub Kicinski 3670b4264c96SJakub Kicinski return 0; 3671b4264c96SJakub Kicinski } 3672b4264c96SJakub Kicinski 36732314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 3674fd068ddcSJakub Kicinski { 36752314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 3676fd068ddcSJakub Kicinski int i; 3677fd068ddcSJakub Kicinski 36782314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 3679fd068ddcSJakub Kicinski int err; 3680fd068ddcSJakub Kicinski 36812314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 3682fd068ddcSJakub Kicinski if (err) 3683fd068ddcSJakub Kicinski return err; 3684fd068ddcSJakub Kicinski 36852314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 3686fd068ddcSJakub Kicinski } 3687fd068ddcSJakub Kicinski 3688fd068ddcSJakub Kicinski return 0; 3689fd068ddcSJakub Kicinski } 3690fd068ddcSJakub Kicinski 369144a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 369244a12eccSJakub Kicinski { 369344a12eccSJakub Kicinski void *prog; 369444a12eccSJakub Kicinski 369544a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 369644a12eccSJakub Kicinski if (!prog) 369744a12eccSJakub Kicinski return; 369844a12eccSJakub Kicinski 369944a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 370044a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 370144a12eccSJakub Kicinski kvfree(nfp_prog->prog); 370244a12eccSJakub Kicinski nfp_prog->prog = prog; 370344a12eccSJakub Kicinski } 370444a12eccSJakub Kicinski 3705c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3706d9ae7f2bSJakub Kicinski { 3707d9ae7f2bSJakub Kicinski int ret; 3708d9ae7f2bSJakub Kicinski 3709b4264c96SJakub Kicinski ret = nfp_bpf_replace_map_ptrs(nfp_prog); 3710b4264c96SJakub Kicinski if (ret) 3711b4264c96SJakub Kicinski return ret; 3712b4264c96SJakub Kicinski 3713d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 3714d9ae7f2bSJakub Kicinski if (ret) 37159314c442SJakub Kicinski return ret; 3716d9ae7f2bSJakub Kicinski 3717d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 3718d9ae7f2bSJakub Kicinski if (ret) { 3719d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 3720d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 37219314c442SJakub Kicinski return -EINVAL; 3722d9ae7f2bSJakub Kicinski } 3723d9ae7f2bSJakub Kicinski 372444a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 372544a12eccSJakub Kicinski 37262314fe9eSJakub Kicinski return ret; 3727d9ae7f2bSJakub Kicinski } 37281549921dSJakub Kicinski 37291549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 37301549921dSJakub Kicinski { 37311549921dSJakub Kicinski struct nfp_insn_meta *meta; 37321549921dSJakub Kicinski 37331549921dSJakub Kicinski /* Another pass to record jump information. */ 37341549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 37351549921dSJakub Kicinski u64 code = meta->insn.code; 37361549921dSJakub Kicinski 37371549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 37381549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 37391549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 37401549921dSJakub Kicinski unsigned short dst_indx; 37411549921dSJakub Kicinski 37421549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 37431549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 37441549921dSJakub Kicinski cnt); 37451549921dSJakub Kicinski 37461549921dSJakub Kicinski meta->jmp_dst = dst_meta; 37471549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 37481549921dSJakub Kicinski } 37491549921dSJakub Kicinski } 37501549921dSJakub Kicinski } 37512314fe9eSJakub Kicinski 375274801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 375374801e50SQuentin Monnet { 375474801e50SQuentin Monnet return !!instr_cb[code]; 375574801e50SQuentin Monnet } 375674801e50SQuentin Monnet 37572314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 37582314fe9eSJakub Kicinski { 37592314fe9eSJakub Kicinski unsigned int i; 37602314fe9eSJakub Kicinski u64 *prog; 37612314fe9eSJakub Kicinski int err; 37622314fe9eSJakub Kicinski 37632314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 37642314fe9eSJakub Kicinski GFP_KERNEL); 37652314fe9eSJakub Kicinski if (!prog) 37662314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 37672314fe9eSJakub Kicinski 37682314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 37692314fe9eSJakub Kicinski enum nfp_relo_type special; 377077a3d311SJakub Kicinski u32 val; 37712314fe9eSJakub Kicinski 37722314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 37732314fe9eSJakub Kicinski switch (special) { 37742314fe9eSJakub Kicinski case RELO_NONE: 37752314fe9eSJakub Kicinski continue; 37762314fe9eSJakub Kicinski case RELO_BR_REL: 37772314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 37782314fe9eSJakub Kicinski break; 37792314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 37802314fe9eSJakub Kicinski br_set_offset(&prog[i], 37812314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 37822314fe9eSJakub Kicinski break; 37832314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 37842314fe9eSJakub Kicinski br_set_offset(&prog[i], 37852314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 37862314fe9eSJakub Kicinski break; 37872314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 37882314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 37892314fe9eSJakub Kicinski break; 379077a3d311SJakub Kicinski case RELO_BR_HELPER: 379177a3d311SJakub Kicinski val = br_get_offset(prog[i]); 379277a3d311SJakub Kicinski val -= BR_OFF_RELO; 379377a3d311SJakub Kicinski switch (val) { 379477a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 379577a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 379677a3d311SJakub Kicinski break; 379744d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 379844d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 379944d65a47SJakub Kicinski break; 3800bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3801bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 3802bfee64deSJakub Kicinski break; 38039816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 38049816dd35SJakub Kicinski val = nfp_prog->bpf->helpers.perf_event_output; 38059816dd35SJakub Kicinski break; 380677a3d311SJakub Kicinski default: 380777a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 380877a3d311SJakub Kicinski val); 380977a3d311SJakub Kicinski err = -EINVAL; 381077a3d311SJakub Kicinski goto err_free_prog; 381177a3d311SJakub Kicinski } 381277a3d311SJakub Kicinski br_set_offset(&prog[i], val); 381377a3d311SJakub Kicinski break; 381477a3d311SJakub Kicinski case RELO_IMMED_REL: 381577a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 381677a3d311SJakub Kicinski break; 38172314fe9eSJakub Kicinski } 38182314fe9eSJakub Kicinski 38192314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 38202314fe9eSJakub Kicinski } 38212314fe9eSJakub Kicinski 38222314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 38232314fe9eSJakub Kicinski if (err) 38242314fe9eSJakub Kicinski goto err_free_prog; 38252314fe9eSJakub Kicinski 38262314fe9eSJakub Kicinski return prog; 38272314fe9eSJakub Kicinski 38282314fe9eSJakub Kicinski err_free_prog: 38292314fe9eSJakub Kicinski kfree(prog); 38302314fe9eSJakub Kicinski return ERR_PTR(err); 38312314fe9eSJakub Kicinski } 3832