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 419d3d23fdbSJiong Wang __emit_mul(struct nfp_prog *nfp_prog, enum alu_dst_ab dst_ab, u16 areg, 420d3d23fdbSJiong Wang enum mul_type type, enum mul_step step, u16 breg, bool swap, 421d3d23fdbSJiong Wang bool wr_both, bool dst_lmextn, bool src_lmextn) 422d3d23fdbSJiong Wang { 423d3d23fdbSJiong Wang u64 insn; 424d3d23fdbSJiong Wang 425d3d23fdbSJiong Wang insn = OP_MUL_BASE | 426d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_A_SRC, areg) | 427d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_B_SRC, breg) | 428d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_STEP, step) | 429d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_DST_AB, dst_ab) | 430d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_SW, swap) | 431d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_TYPE, type) | 432d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_WR_AB, wr_both) | 433d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_SRC_LMEXTN, src_lmextn) | 434d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_DST_LMEXTN, dst_lmextn); 435d3d23fdbSJiong Wang 436d3d23fdbSJiong Wang nfp_prog_push(nfp_prog, insn); 437d3d23fdbSJiong Wang } 438d3d23fdbSJiong Wang 439d3d23fdbSJiong Wang static void 440d3d23fdbSJiong Wang emit_mul(struct nfp_prog *nfp_prog, swreg lreg, enum mul_type type, 441d3d23fdbSJiong Wang enum mul_step step, swreg rreg) 442d3d23fdbSJiong Wang { 443d3d23fdbSJiong Wang struct nfp_insn_ur_regs reg; 444d3d23fdbSJiong Wang u16 areg; 445d3d23fdbSJiong Wang int err; 446d3d23fdbSJiong Wang 447d3d23fdbSJiong Wang if (type == MUL_TYPE_START && step != MUL_STEP_NONE) { 448d3d23fdbSJiong Wang nfp_prog->error = -EINVAL; 449d3d23fdbSJiong Wang return; 450d3d23fdbSJiong Wang } 451d3d23fdbSJiong Wang 452d3d23fdbSJiong Wang if (step == MUL_LAST || step == MUL_LAST_2) { 453d3d23fdbSJiong Wang /* When type is step and step Number is LAST or LAST2, left 454d3d23fdbSJiong Wang * source is used as destination. 455d3d23fdbSJiong Wang */ 456d3d23fdbSJiong Wang err = swreg_to_unrestricted(lreg, reg_none(), rreg, ®); 457d3d23fdbSJiong Wang areg = reg.dst; 458d3d23fdbSJiong Wang } else { 459d3d23fdbSJiong Wang err = swreg_to_unrestricted(reg_none(), lreg, rreg, ®); 460d3d23fdbSJiong Wang areg = reg.areg; 461d3d23fdbSJiong Wang } 462d3d23fdbSJiong Wang 463d3d23fdbSJiong Wang if (err) { 464d3d23fdbSJiong Wang nfp_prog->error = err; 465d3d23fdbSJiong Wang return; 466d3d23fdbSJiong Wang } 467d3d23fdbSJiong Wang 468d3d23fdbSJiong Wang __emit_mul(nfp_prog, reg.dst_ab, areg, type, step, reg.breg, reg.swap, 469d3d23fdbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 470d3d23fdbSJiong Wang } 471d3d23fdbSJiong Wang 472d3d23fdbSJiong Wang static void 473d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 474d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 475995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 476995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 477d9ae7f2bSJakub Kicinski { 478d9ae7f2bSJakub Kicinski u64 insn; 479d9ae7f2bSJakub Kicinski 480d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 481d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 482d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 483d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 484d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 485d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 486d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 487d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 488d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 489995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 490995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 491995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 492d9ae7f2bSJakub Kicinski 493d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 494d9ae7f2bSJakub Kicinski } 495d9ae7f2bSJakub Kicinski 496d9ae7f2bSJakub Kicinski static void 497bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 498bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 499d9ae7f2bSJakub Kicinski { 500d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 501d9ae7f2bSJakub Kicinski int err; 502d9ae7f2bSJakub Kicinski 5032de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 5042de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 505d9ae7f2bSJakub Kicinski if (err) { 506d9ae7f2bSJakub Kicinski nfp_prog->error = err; 507d9ae7f2bSJakub Kicinski return; 508d9ae7f2bSJakub Kicinski } 509d9ae7f2bSJakub Kicinski 510d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 511995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 512995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 513d9ae7f2bSJakub Kicinski } 514d9ae7f2bSJakub Kicinski 515d9ae7f2bSJakub Kicinski static void 516b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 517d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 518d9ae7f2bSJakub Kicinski { 519bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 520d9ae7f2bSJakub Kicinski } 521d9ae7f2bSJakub Kicinski 5222df03a50SJakub Kicinski static void 5232df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 5242df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 5252df03a50SJakub Kicinski { 5262df03a50SJakub Kicinski u64 insn; 5272df03a50SJakub Kicinski 5282df03a50SJakub Kicinski insn = OP_LCSR_BASE | 5292df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 5302df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 5312df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 532df4a37d8SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr / 4) | 5332df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 5342df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 5352df03a50SJakub Kicinski 5362df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 5372df03a50SJakub Kicinski } 5382df03a50SJakub Kicinski 5392df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 5402df03a50SJakub Kicinski { 5412df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 5422df03a50SJakub Kicinski int err; 5432df03a50SJakub Kicinski 5442df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 5452df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 5462df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 5472df03a50SJakub Kicinski * copy the immed to both operands. 5482df03a50SJakub Kicinski */ 5492df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 5502df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 5512df03a50SJakub Kicinski reg.breg = reg.areg; 5522df03a50SJakub Kicinski } else { 5532df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 5542df03a50SJakub Kicinski } 5552df03a50SJakub Kicinski if (err) { 5562df03a50SJakub Kicinski nfp_prog->error = err; 5572df03a50SJakub Kicinski return; 5582df03a50SJakub Kicinski } 5592df03a50SJakub Kicinski 560df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr, 5612df03a50SJakub Kicinski false, reg.src_lmextn); 5622df03a50SJakub Kicinski } 5632df03a50SJakub Kicinski 564df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 565df4a37d8SJakub Kicinski static void __emit_csr_rd(struct nfp_prog *nfp_prog, u16 addr) 566df4a37d8SJakub Kicinski { 567df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, 0, 0, false, addr, false, false); 568df4a37d8SJakub Kicinski } 569df4a37d8SJakub Kicinski 5701c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 5711c03e03fSJakub Kicinski { 5721c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 5731c03e03fSJakub Kicinski } 5741c03e03fSJakub Kicinski 575d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 576d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 577d9ae7f2bSJakub Kicinski { 578d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 579d9ae7f2bSJakub Kicinski *val = imm; 580d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 581d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 582d9ae7f2bSJakub Kicinski *val = imm >> 8; 583d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 584d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 585d9ae7f2bSJakub Kicinski *val = imm >> 16; 586d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 587d9ae7f2bSJakub Kicinski } else { 588d9ae7f2bSJakub Kicinski return false; 589d9ae7f2bSJakub Kicinski } 590d9ae7f2bSJakub Kicinski 591d9ae7f2bSJakub Kicinski return true; 592d9ae7f2bSJakub Kicinski } 593d9ae7f2bSJakub Kicinski 594b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 595d9ae7f2bSJakub Kicinski { 596d9ae7f2bSJakub Kicinski enum immed_shift shift; 597d9ae7f2bSJakub Kicinski u16 val; 598d9ae7f2bSJakub Kicinski 599d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 600d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 601d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 602d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 603d9ae7f2bSJakub Kicinski } else { 604d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 605d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 606d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 607d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 608d9ae7f2bSJakub Kicinski } 609d9ae7f2bSJakub Kicinski } 610d9ae7f2bSJakub Kicinski 61177a3d311SJakub Kicinski static void 61277a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 61377a3d311SJakub Kicinski enum nfp_relo_type relo) 61477a3d311SJakub Kicinski { 61577a3d311SJakub Kicinski if (imm > 0xffff) { 61677a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 61777a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 61877a3d311SJakub Kicinski return; 61977a3d311SJakub Kicinski } 62077a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 62177a3d311SJakub Kicinski 62277a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 62377a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 62477a3d311SJakub Kicinski } 62577a3d311SJakub Kicinski 626d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 627d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 628d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 629d9ae7f2bSJakub Kicinski */ 630b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 631d9ae7f2bSJakub Kicinski { 632d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 633d9ae7f2bSJakub Kicinski return reg_imm(imm); 634d9ae7f2bSJakub Kicinski 635d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 636d9ae7f2bSJakub Kicinski return tmp_reg; 637d9ae7f2bSJakub Kicinski } 638d9ae7f2bSJakub Kicinski 639d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 640d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 641d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 642d9ae7f2bSJakub Kicinski */ 643b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 644d9ae7f2bSJakub Kicinski { 645d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 646d9ae7f2bSJakub Kicinski return reg_imm(imm); 647d9ae7f2bSJakub Kicinski 648d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 649d9ae7f2bSJakub Kicinski return tmp_reg; 650d9ae7f2bSJakub Kicinski } 651d9ae7f2bSJakub Kicinski 652ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 653ff42bb9fSJakub Kicinski { 654ff42bb9fSJakub Kicinski while (count--) 655ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 656ff42bb9fSJakub Kicinski } 657ff42bb9fSJakub Kicinski 658c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 659c000dfb5SJakub Kicinski { 660c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 661c000dfb5SJakub Kicinski } 662c000dfb5SJakub Kicinski 663d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 664d9ae7f2bSJakub Kicinski { 665c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 666d9ae7f2bSJakub Kicinski } 667d9ae7f2bSJakub Kicinski 6689879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 6699879a381SJiong Wang * result to @dst from low end. 6709879a381SJiong Wang */ 6719879a381SJiong Wang static void 6729879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 6739879a381SJiong Wang u8 offset) 6749879a381SJiong Wang { 6759879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 6769879a381SJiong Wang u8 mask = (1 << field_len) - 1; 6779879a381SJiong Wang 6789879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 6799879a381SJiong Wang } 6809879a381SJiong Wang 68191ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 68291ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 68391ff69e8SJiong Wang */ 68491ff69e8SJiong Wang static void 68591ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 68691ff69e8SJiong Wang u8 field_len, u8 offset) 68791ff69e8SJiong Wang { 68891ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 68991ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 69091ff69e8SJiong Wang 69191ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 69291ff69e8SJiong Wang } 69391ff69e8SJiong Wang 6943dd43c33SJakub Kicinski static void 6953dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 6963dd43c33SJakub Kicinski swreg *rega, swreg *regb) 6973dd43c33SJakub Kicinski { 6983dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 6993dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 7003dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 7013dd43c33SJakub Kicinski return; 7023dd43c33SJakub Kicinski } 7033dd43c33SJakub Kicinski 7043dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 7053dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 7063dd43c33SJakub Kicinski reg_imm(0)); 7073dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 7083dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 7093dd43c33SJakub Kicinski } 7103dd43c33SJakub Kicinski 7119879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 7129879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 7139879a381SJiong Wang { 7149879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 7159879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 7169879a381SJiong Wang swreg src_base, off; 7173dd43c33SJakub Kicinski bool src_40bit_addr; 7189879a381SJiong Wang unsigned int i; 7199879a381SJiong Wang u8 xfer_num; 7209879a381SJiong Wang 7219879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 7223dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 7239879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 7249879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 7259879a381SJiong Wang 7263dd43c33SJakub Kicinski if (src_40bit_addr) 727cc0dff6dSJiong Wang addr40_offset(nfp_prog, meta->insn.src_reg * 2, off, &src_base, 7283dd43c33SJakub Kicinski &off); 7293dd43c33SJakub Kicinski 7308c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 7318c900538SJiong Wang if (len > 32) 7328c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7338c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7348c900538SJiong Wang 7359879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 7363dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 7373dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 738b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 7399879a381SJiong Wang 7409879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 7419879a381SJiong Wang for (i = 0; i < xfer_num; i++) 7429879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 7439879a381SJiong Wang 7449879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 7459879a381SJiong Wang 7469879a381SJiong Wang if (len <= 8) { 7479879a381SJiong Wang /* Use single direct_ref write8. */ 7489879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7499879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 750b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7518c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 7529879a381SJiong Wang /* Use single direct_ref write32. */ 7539879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7549879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 755b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7568c900538SJiong Wang } else if (len <= 32) { 7579879a381SJiong Wang /* Use single indirect_ref write8. */ 7589879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 7599879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 7609879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7619879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 762b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 7638c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 7648c900538SJiong Wang /* Use single indirect_ref write32. */ 7658c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7668c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7678c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7688c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 769b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 7708c900538SJiong Wang } else if (len <= 40) { 7718c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 7728c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 7738c900538SJiong Wang */ 7748c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7758c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 776b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7778c900538SJiong Wang 7788c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 7798c900538SJiong Wang imm_b(nfp_prog)); 7808c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 7818c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 782b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7838c900538SJiong Wang } else { 7848c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 7858c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 7868c900538SJiong Wang */ 7878c900538SJiong Wang u8 new_off; 7888c900538SJiong Wang 7898c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7908c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 7918c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7928c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 793b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 7948c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 7958c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 7968c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 7978c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 798b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 7999879a381SJiong Wang } 8009879a381SJiong Wang 8019879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 8029879a381SJiong Wang * before and after we do memory copy optimization. 8039879a381SJiong Wang * 8049879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 8059879a381SJiong Wang * need to make sure it is loaded with the value the same as before 8069879a381SJiong Wang * this transformation. 8079879a381SJiong Wang * 8089879a381SJiong Wang * These extra loads could be removed once we have accurate register 8099879a381SJiong Wang * usage information. 8109879a381SJiong Wang */ 8119879a381SJiong Wang if (descending_seq) 8129879a381SJiong Wang xfer_num = 0; 8139879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 8149879a381SJiong Wang xfer_num = xfer_num - 1; 8159879a381SJiong Wang else 8169879a381SJiong Wang xfer_num = xfer_num - 2; 8179879a381SJiong Wang 8189879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 8199879a381SJiong Wang case BPF_B: 8209879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8219879a381SJiong Wang reg_xfer(xfer_num), 1, 8229879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 8239879a381SJiong Wang break; 8249879a381SJiong Wang case BPF_H: 8259879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8269879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 8279879a381SJiong Wang break; 8289879a381SJiong Wang case BPF_W: 8299879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8309879a381SJiong Wang reg_xfer(0)); 8319879a381SJiong Wang break; 8329879a381SJiong Wang case BPF_DW: 8339879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8349879a381SJiong Wang reg_xfer(xfer_num)); 8359879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 8369879a381SJiong Wang reg_xfer(xfer_num + 1)); 8379879a381SJiong Wang break; 8389879a381SJiong Wang } 8399879a381SJiong Wang 8409879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 8419879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 8429879a381SJiong Wang 8439879a381SJiong Wang return 0; 8449879a381SJiong Wang } 8459879a381SJiong Wang 846d9ae7f2bSJakub Kicinski static int 8470a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 848d9ae7f2bSJakub Kicinski { 849d9ae7f2bSJakub Kicinski unsigned int i; 850d9ae7f2bSJakub Kicinski u16 shift, sz; 851d9ae7f2bSJakub Kicinski 852d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 853d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 854d9ae7f2bSJakub Kicinski */ 8550a793977SJakub Kicinski sz = max(size, 4); 856d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 857d9ae7f2bSJakub Kicinski 8580a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 859b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 8600a793977SJakub Kicinski 8610a793977SJakub Kicinski i = 0; 8620a793977SJakub Kicinski if (shift) 8630a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 8640a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 8650a793977SJakub Kicinski else 8660a793977SJakub Kicinski for (; i * 4 < size; i++) 8670a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8680a793977SJakub Kicinski 8690a793977SJakub Kicinski if (i < 2) 8700a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 8710a793977SJakub Kicinski 8720a793977SJakub Kicinski return 0; 8730a793977SJakub Kicinski } 8740a793977SJakub Kicinski 8750a793977SJakub Kicinski static int 8763dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 8773dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 8782ca71441SJakub Kicinski { 8792ca71441SJakub Kicinski unsigned int i; 8802ca71441SJakub Kicinski u8 mask, sz; 8812ca71441SJakub Kicinski 8823dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 8832ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 8842ca71441SJakub Kicinski */ 8852ca71441SJakub Kicinski sz = max(size, 4); 8862ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 8872ca71441SJakub Kicinski 8883dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 889b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 8902ca71441SJakub Kicinski 8912ca71441SJakub Kicinski i = 0; 8922ca71441SJakub Kicinski if (mask) 8932ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 8942ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 8952ca71441SJakub Kicinski else 8962ca71441SJakub Kicinski for (; i * 4 < size; i++) 8972ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8982ca71441SJakub Kicinski 8992ca71441SJakub Kicinski if (i < 2) 9002ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 9012ca71441SJakub Kicinski 9022ca71441SJakub Kicinski return 0; 9032ca71441SJakub Kicinski } 9042ca71441SJakub Kicinski 9052ca71441SJakub Kicinski static int 9063dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 9073dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 9083dd43c33SJakub Kicinski { 9093dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 9103dd43c33SJakub Kicinski size, CMD_MODE_32b); 9113dd43c33SJakub Kicinski } 9123dd43c33SJakub Kicinski 9133dd43c33SJakub Kicinski static int 9143dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 9153dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 9163dd43c33SJakub Kicinski { 9173dd43c33SJakub Kicinski swreg rega, regb; 9183dd43c33SJakub Kicinski 9193dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 9203dd43c33SJakub Kicinski 9213dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 9223dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 9233dd43c33SJakub Kicinski } 9243dd43c33SJakub Kicinski 9253dd43c33SJakub Kicinski static int 9260a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 9270a793977SJakub Kicinski { 9280a793977SJakub Kicinski swreg tmp_reg; 9290a793977SJakub Kicinski 930d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 931d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9320a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 9330a793977SJakub Kicinski 934d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 935d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 936d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 937d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 93818e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 939e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9400a793977SJakub Kicinski 941d9ae7f2bSJakub Kicinski /* Load data */ 9420a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 943d9ae7f2bSJakub Kicinski } 944d9ae7f2bSJakub Kicinski 945d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 946d9ae7f2bSJakub Kicinski { 9470a793977SJakub Kicinski swreg tmp_reg; 9480a793977SJakub Kicinski 9490a793977SJakub Kicinski /* Check packet length */ 9500a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 9510a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 952e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9530a793977SJakub Kicinski 9540a793977SJakub Kicinski /* Load data */ 9550a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9560a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 957d9ae7f2bSJakub Kicinski } 958d9ae7f2bSJakub Kicinski 959e663fe38SJakub Kicinski static int 960e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 961e663fe38SJakub Kicinski u8 src_gpr, u8 size) 962e663fe38SJakub Kicinski { 963e663fe38SJakub Kicinski unsigned int i; 964e663fe38SJakub Kicinski 965e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 966e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 967e663fe38SJakub Kicinski 968e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 969b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 970e663fe38SJakub Kicinski 971e663fe38SJakub Kicinski return 0; 972e663fe38SJakub Kicinski } 973e663fe38SJakub Kicinski 974e663fe38SJakub Kicinski static int 975e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 976e663fe38SJakub Kicinski u64 imm, u8 size) 977e663fe38SJakub Kicinski { 978e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 979e663fe38SJakub Kicinski if (size == 8) 980e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 981e663fe38SJakub Kicinski 982e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 983b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 984e663fe38SJakub Kicinski 985e663fe38SJakub Kicinski return 0; 986e663fe38SJakub Kicinski } 987e663fe38SJakub Kicinski 988ee9133a8SJakub Kicinski typedef int 989ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 9902df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9912df03a50SJakub Kicinski bool needs_inc); 992a82b23fbSJakub Kicinski 993a82b23fbSJakub Kicinski static int 994a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 9952df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9962df03a50SJakub Kicinski bool needs_inc) 997a82b23fbSJakub Kicinski { 9982df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 999a82b23fbSJakub Kicinski u32 idx, src_byte; 1000a82b23fbSJakub Kicinski enum shf_sc sc; 1001a82b23fbSJakub Kicinski swreg reg; 1002a82b23fbSJakub Kicinski int shf; 1003a82b23fbSJakub Kicinski u8 mask; 1004a82b23fbSJakub Kicinski 1005a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 1006a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1007a82b23fbSJakub Kicinski 1008a82b23fbSJakub Kicinski idx = off / 4; 1009a82b23fbSJakub Kicinski 1010a82b23fbSJakub Kicinski /* Move the entire word */ 1011a82b23fbSJakub Kicinski if (size == 4) { 10122df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 10132df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 1014a82b23fbSJakub Kicinski return 0; 1015a82b23fbSJakub Kicinski } 1016a82b23fbSJakub Kicinski 10172df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 10182df03a50SJakub Kicinski return -EOPNOTSUPP; 10192df03a50SJakub Kicinski 1020a82b23fbSJakub Kicinski src_byte = off % 4; 1021a82b23fbSJakub Kicinski 1022a82b23fbSJakub Kicinski mask = (1 << size) - 1; 1023a82b23fbSJakub Kicinski mask <<= dst_byte; 1024a82b23fbSJakub Kicinski 1025a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1026a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1027a82b23fbSJakub Kicinski 1028a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1029a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 1030a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 1031a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 1032a82b23fbSJakub Kicinski shf = 32 - shf; 1033a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 1034a82b23fbSJakub Kicinski } else { 1035a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 1036a82b23fbSJakub Kicinski } 1037a82b23fbSJakub Kicinski 1038a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1039a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1040a82b23fbSJakub Kicinski */ 1041a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 10422df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1043a82b23fbSJakub Kicinski } else { 1044a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 10459a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 10469a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 10479a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 10489a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 10499a90c83cSJakub Kicinski */ 10509a90c83cSJakub Kicinski if (first || !new_gpr) 1051a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1052a82b23fbSJakub Kicinski } 1053a82b23fbSJakub Kicinski 1054a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 1055a82b23fbSJakub Kicinski 10562df03a50SJakub Kicinski if (should_inc) 10572df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10582df03a50SJakub Kicinski 1059a82b23fbSJakub Kicinski return 0; 1060a82b23fbSJakub Kicinski } 1061ee9133a8SJakub Kicinski 1062ee9133a8SJakub Kicinski static int 1063ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 10642df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10652df03a50SJakub Kicinski bool needs_inc) 1066ee9133a8SJakub Kicinski { 10672df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1068ee9133a8SJakub Kicinski u32 idx, dst_byte; 1069ee9133a8SJakub Kicinski enum shf_sc sc; 1070ee9133a8SJakub Kicinski swreg reg; 1071ee9133a8SJakub Kicinski int shf; 1072ee9133a8SJakub Kicinski u8 mask; 1073ee9133a8SJakub Kicinski 1074ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 1075ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1076ee9133a8SJakub Kicinski 1077ee9133a8SJakub Kicinski idx = off / 4; 1078ee9133a8SJakub Kicinski 1079ee9133a8SJakub Kicinski /* Move the entire word */ 1080ee9133a8SJakub Kicinski if (size == 4) { 10812df03a50SJakub Kicinski wrp_mov(nfp_prog, 10822df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 10832df03a50SJakub Kicinski reg_b(src)); 1084ee9133a8SJakub Kicinski return 0; 1085ee9133a8SJakub Kicinski } 1086ee9133a8SJakub Kicinski 10872df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 10882df03a50SJakub Kicinski return -EOPNOTSUPP; 10892df03a50SJakub Kicinski 1090ee9133a8SJakub Kicinski dst_byte = off % 4; 1091ee9133a8SJakub Kicinski 1092ee9133a8SJakub Kicinski mask = (1 << size) - 1; 1093ee9133a8SJakub Kicinski mask <<= dst_byte; 1094ee9133a8SJakub Kicinski 1095ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1096ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1097ee9133a8SJakub Kicinski 1098ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1099ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 1100ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 1101ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 1102ee9133a8SJakub Kicinski shf = 32 - shf; 1103ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 1104ee9133a8SJakub Kicinski } else { 1105ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 1106ee9133a8SJakub Kicinski } 1107ee9133a8SJakub Kicinski 1108ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1109ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1110ee9133a8SJakub Kicinski */ 1111ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 11122df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1113ee9133a8SJakub Kicinski } else { 1114ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 11159a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 11169a90c83cSJakub Kicinski * the middle location will be overwritten fully. 11179a90c83cSJakub Kicinski */ 11189a90c83cSJakub Kicinski if (first || last) 1119ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1120ee9133a8SJakub Kicinski } 1121ee9133a8SJakub Kicinski 1122ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 1123ee9133a8SJakub Kicinski 11249a90c83cSJakub Kicinski if (new_gpr || last) { 1125ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1126ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 11272df03a50SJakub Kicinski if (should_inc) 11282df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 11299a90c83cSJakub Kicinski } 1130ee9133a8SJakub Kicinski 1131ee9133a8SJakub Kicinski return 0; 1132ee9133a8SJakub Kicinski } 1133ee9133a8SJakub Kicinski 1134ee9133a8SJakub Kicinski static int 1135ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1136b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1137b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1138ee9133a8SJakub Kicinski { 1139d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 11409a90c83cSJakub Kicinski bool first = true, last; 11412df03a50SJakub Kicinski bool needs_inc = false; 11422df03a50SJakub Kicinski swreg stack_off_reg; 1143a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1144ee9133a8SJakub Kicinski u32 gpr_byte = 0; 11452df03a50SJakub Kicinski bool lm3 = true; 1146ee9133a8SJakub Kicinski int ret; 1147ee9133a8SJakub Kicinski 1148b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1149b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1150b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1151b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1152b14157eeSJakub Kicinski */ 1153b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1154b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1155b14157eeSJakub Kicinski 1156b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1157b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1158b14157eeSJakub Kicinski 1159b14157eeSJakub Kicinski needs_inc = true; 1160b14157eeSJakub Kicinski } else if (off + size <= 64) { 11612df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 11622df03a50SJakub Kicinski lm3 = false; 11632df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 11642df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 11652df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 11662df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 11672df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 11682df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 11692df03a50SJakub Kicinski */ 11702df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 11712df03a50SJakub Kicinski stack_imm(nfp_prog)); 11722df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11732df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11742df03a50SJakub Kicinski 11752df03a50SJakub Kicinski off %= 32; 11762df03a50SJakub Kicinski } else { 11772df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 11782df03a50SJakub Kicinski stack_imm(nfp_prog)); 11792df03a50SJakub Kicinski 11802df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11812df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11822df03a50SJakub Kicinski 11832df03a50SJakub Kicinski needs_inc = true; 11842df03a50SJakub Kicinski } 11852df03a50SJakub Kicinski if (lm3) { 11862df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 11872df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 11882df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 11892df03a50SJakub Kicinski } 11902df03a50SJakub Kicinski 1191a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1192a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1193a82b23fbSJakub Kicinski 1194ee9133a8SJakub Kicinski while (size) { 1195ee9133a8SJakub Kicinski u32 slice_end; 1196ee9133a8SJakub Kicinski u8 slice_size; 1197ee9133a8SJakub Kicinski 1198ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1199ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1200ee9133a8SJakub Kicinski slice_size = slice_end - off; 1201ee9133a8SJakub Kicinski 12029a90c83cSJakub Kicinski last = slice_size == size; 12039a90c83cSJakub Kicinski 12042df03a50SJakub Kicinski if (needs_inc) 12052df03a50SJakub Kicinski off %= 4; 12062df03a50SJakub Kicinski 1207a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 12082df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1209ee9133a8SJakub Kicinski if (ret) 1210ee9133a8SJakub Kicinski return ret; 1211ee9133a8SJakub Kicinski 1212a82b23fbSJakub Kicinski prev_gpr = gpr; 12139a90c83cSJakub Kicinski first = false; 12149a90c83cSJakub Kicinski 1215ee9133a8SJakub Kicinski gpr_byte += slice_size; 1216ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1217ee9133a8SJakub Kicinski gpr_byte -= 4; 1218ee9133a8SJakub Kicinski gpr++; 1219ee9133a8SJakub Kicinski } 1220ee9133a8SJakub Kicinski 1221ee9133a8SJakub Kicinski size -= slice_size; 1222ee9133a8SJakub Kicinski off += slice_size; 1223ee9133a8SJakub Kicinski } 1224ee9133a8SJakub Kicinski 1225ee9133a8SJakub Kicinski return 0; 1226ee9133a8SJakub Kicinski } 1227ee9133a8SJakub Kicinski 1228d9ae7f2bSJakub Kicinski static void 1229d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1230d9ae7f2bSJakub Kicinski { 1231b3f868dfSJakub Kicinski swreg tmp_reg; 1232d9ae7f2bSJakub Kicinski 1233d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1234d9ae7f2bSJakub Kicinski if (!imm) 1235d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1236d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1237d9ae7f2bSJakub Kicinski return; 1238d9ae7f2bSJakub Kicinski } 1239d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1240d9ae7f2bSJakub Kicinski if (!~imm) 1241d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1242d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1243d9ae7f2bSJakub Kicinski return; 1244d9ae7f2bSJakub Kicinski } 1245d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1246d9ae7f2bSJakub Kicinski if (!~imm) 1247d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 12485d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1249d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1250d9ae7f2bSJakub Kicinski return; 1251d9ae7f2bSJakub Kicinski } 1252d9ae7f2bSJakub Kicinski 1253d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1254d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1255d9ae7f2bSJakub Kicinski } 1256d9ae7f2bSJakub Kicinski 1257d9ae7f2bSJakub Kicinski static int 1258d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1259d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1260d9ae7f2bSJakub Kicinski { 1261d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1262d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1263d9ae7f2bSJakub Kicinski 1264d9ae7f2bSJakub Kicinski if (skip) { 1265d9ae7f2bSJakub Kicinski meta->skip = true; 1266d9ae7f2bSJakub Kicinski return 0; 1267d9ae7f2bSJakub Kicinski } 1268d9ae7f2bSJakub Kicinski 1269d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1270d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1271d9ae7f2bSJakub Kicinski 1272d9ae7f2bSJakub Kicinski return 0; 1273d9ae7f2bSJakub Kicinski } 1274d9ae7f2bSJakub Kicinski 1275d9ae7f2bSJakub Kicinski static int 1276d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1277d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1278d9ae7f2bSJakub Kicinski { 1279d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1280d9ae7f2bSJakub Kicinski 1281d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1282d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1283d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1284d9ae7f2bSJakub Kicinski 1285d9ae7f2bSJakub Kicinski return 0; 1286d9ae7f2bSJakub Kicinski } 1287d9ae7f2bSJakub Kicinski 1288d9ae7f2bSJakub Kicinski static int 1289d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1290d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1291d9ae7f2bSJakub Kicinski { 1292d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1293d9ae7f2bSJakub Kicinski 1294d9ae7f2bSJakub Kicinski if (skip) { 1295d9ae7f2bSJakub Kicinski meta->skip = true; 1296d9ae7f2bSJakub Kicinski return 0; 1297d9ae7f2bSJakub Kicinski } 1298d9ae7f2bSJakub Kicinski 1299d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1300d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1301d9ae7f2bSJakub Kicinski 1302d9ae7f2bSJakub Kicinski return 0; 1303d9ae7f2bSJakub Kicinski } 1304d9ae7f2bSJakub Kicinski 1305d9ae7f2bSJakub Kicinski static int 1306d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1307d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1308d9ae7f2bSJakub Kicinski { 1309d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1310d9ae7f2bSJakub Kicinski 1311d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1312d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1313d9ae7f2bSJakub Kicinski 1314d9ae7f2bSJakub Kicinski return 0; 1315d9ae7f2bSJakub Kicinski } 1316d9ae7f2bSJakub Kicinski 1317d9ae7f2bSJakub Kicinski static void 1318d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1319d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1320d9ae7f2bSJakub Kicinski { 1321d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1322d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1323d9ae7f2bSJakub Kicinski } 1324d9ae7f2bSJakub Kicinski 1325d9ae7f2bSJakub Kicinski static int 1326d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1327d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1328d9ae7f2bSJakub Kicinski { 1329d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1330d9ae7f2bSJakub Kicinski 1331d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1332d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1333d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1334d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1335d9ae7f2bSJakub Kicinski 1336d9ae7f2bSJakub Kicinski return 0; 1337d9ae7f2bSJakub Kicinski } 1338d9ae7f2bSJakub Kicinski 133961dd8f00SJakub Kicinski static const struct jmp_code_map { 134061dd8f00SJakub Kicinski enum br_mask br_mask; 134161dd8f00SJakub Kicinski bool swap; 134261dd8f00SJakub Kicinski } jmp_code_map[] = { 134361dd8f00SJakub Kicinski [BPF_JGT >> 4] = { BR_BLO, true }, 134461dd8f00SJakub Kicinski [BPF_JGE >> 4] = { BR_BHS, false }, 134561dd8f00SJakub Kicinski [BPF_JLT >> 4] = { BR_BLO, false }, 134661dd8f00SJakub Kicinski [BPF_JLE >> 4] = { BR_BHS, true }, 134761dd8f00SJakub Kicinski [BPF_JSGT >> 4] = { BR_BLT, true }, 134861dd8f00SJakub Kicinski [BPF_JSGE >> 4] = { BR_BGE, false }, 134961dd8f00SJakub Kicinski [BPF_JSLT >> 4] = { BR_BLT, false }, 135061dd8f00SJakub Kicinski [BPF_JSLE >> 4] = { BR_BGE, true }, 135161dd8f00SJakub Kicinski }; 135261dd8f00SJakub Kicinski 135361dd8f00SJakub Kicinski static const struct jmp_code_map *nfp_jmp_code_get(struct nfp_insn_meta *meta) 135461dd8f00SJakub Kicinski { 135561dd8f00SJakub Kicinski unsigned int op; 135661dd8f00SJakub Kicinski 135761dd8f00SJakub Kicinski op = BPF_OP(meta->insn.code) >> 4; 135861dd8f00SJakub Kicinski /* br_mask of 0 is BR_BEQ which we don't use in jump code table */ 135961dd8f00SJakub Kicinski if (WARN_ONCE(op >= ARRAY_SIZE(jmp_code_map) || 136061dd8f00SJakub Kicinski !jmp_code_map[op].br_mask, 136161dd8f00SJakub Kicinski "no code found for jump instruction")) 136261dd8f00SJakub Kicinski return NULL; 136361dd8f00SJakub Kicinski 136461dd8f00SJakub Kicinski return &jmp_code_map[op]; 136561dd8f00SJakub Kicinski } 136661dd8f00SJakub Kicinski 136761dd8f00SJakub Kicinski static int cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1368d9ae7f2bSJakub Kicinski { 1369d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1370d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 137161dd8f00SJakub Kicinski const struct jmp_code_map *code; 13727bdc97beSJakub Kicinski enum alu_op alu_op, carry_op; 1373d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1374b3f868dfSJakub Kicinski swreg tmp_reg; 1375d9ae7f2bSJakub Kicinski 137661dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 137761dd8f00SJakub Kicinski if (!code) 137861dd8f00SJakub Kicinski return -EINVAL; 137961dd8f00SJakub Kicinski 13807bdc97beSJakub Kicinski alu_op = meta->jump_neg_op ? ALU_OP_ADD : ALU_OP_SUB; 13817bdc97beSJakub Kicinski carry_op = meta->jump_neg_op ? ALU_OP_ADD_C : ALU_OP_SUB_C; 13827bdc97beSJakub Kicinski 1383d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 138461dd8f00SJakub Kicinski if (!code->swap) 13857bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), alu_op, tmp_reg); 1386d9ae7f2bSJakub Kicinski else 13877bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, alu_op, reg_a(reg)); 1388d9ae7f2bSJakub Kicinski 1389d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 139061dd8f00SJakub Kicinski if (!code->swap) 1391d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 13927bdc97beSJakub Kicinski reg_a(reg + 1), carry_op, tmp_reg); 1393d9ae7f2bSJakub Kicinski else 1394d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 13957bdc97beSJakub Kicinski tmp_reg, carry_op, reg_a(reg + 1)); 1396d9ae7f2bSJakub Kicinski 139761dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1398d9ae7f2bSJakub Kicinski 1399d9ae7f2bSJakub Kicinski return 0; 1400d9ae7f2bSJakub Kicinski } 1401d9ae7f2bSJakub Kicinski 140261dd8f00SJakub Kicinski static int cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1403d9ae7f2bSJakub Kicinski { 1404d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 140561dd8f00SJakub Kicinski const struct jmp_code_map *code; 140626fa818dSJakub Kicinski u8 areg, breg; 140726fa818dSJakub Kicinski 140861dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 140961dd8f00SJakub Kicinski if (!code) 141061dd8f00SJakub Kicinski return -EINVAL; 141161dd8f00SJakub Kicinski 141226fa818dSJakub Kicinski areg = insn->dst_reg * 2; 141326fa818dSJakub Kicinski breg = insn->src_reg * 2; 1414d9ae7f2bSJakub Kicinski 141561dd8f00SJakub Kicinski if (code->swap) { 1416d9ae7f2bSJakub Kicinski areg ^= breg; 1417d9ae7f2bSJakub Kicinski breg ^= areg; 1418d9ae7f2bSJakub Kicinski areg ^= breg; 1419d9ae7f2bSJakub Kicinski } 1420d9ae7f2bSJakub Kicinski 1421d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1422d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1423d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 142461dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1425d9ae7f2bSJakub Kicinski 1426d9ae7f2bSJakub Kicinski return 0; 1427d9ae7f2bSJakub Kicinski } 1428d9ae7f2bSJakub Kicinski 14293119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 14303119d1fdSJakub Kicinski { 14313119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 14323119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 14333119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 14343119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 14353119d1fdSJakub Kicinski } 14363119d1fdSJakub Kicinski 1437d3d23fdbSJiong Wang static void 1438d3d23fdbSJiong Wang wrp_mul_u32(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1439d3d23fdbSJiong Wang swreg rreg, bool gen_high_half) 1440d3d23fdbSJiong Wang { 1441d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1442d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_1, rreg); 1443d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_2, rreg); 1444d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_3, rreg); 1445d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_4, rreg); 1446d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_32x32, MUL_LAST, reg_none()); 1447d3d23fdbSJiong Wang if (gen_high_half) 1448d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_hi, MUL_TYPE_STEP_32x32, MUL_LAST_2, 1449d3d23fdbSJiong Wang reg_none()); 1450d3d23fdbSJiong Wang else 1451d3d23fdbSJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1452d3d23fdbSJiong Wang } 1453d3d23fdbSJiong Wang 1454d3d23fdbSJiong Wang static void 1455d3d23fdbSJiong Wang wrp_mul_u16(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1456d3d23fdbSJiong Wang swreg rreg) 1457d3d23fdbSJiong Wang { 1458d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1459d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_1, rreg); 1460d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_2, rreg); 1461d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_16x16, MUL_LAST, reg_none()); 1462d3d23fdbSJiong Wang } 1463d3d23fdbSJiong Wang 1464d3d23fdbSJiong Wang static int 1465d3d23fdbSJiong Wang wrp_mul(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1466d3d23fdbSJiong Wang bool gen_high_half, bool ropnd_from_reg) 1467d3d23fdbSJiong Wang { 1468d3d23fdbSJiong Wang swreg multiplier, multiplicand, dst_hi, dst_lo; 1469d3d23fdbSJiong Wang const struct bpf_insn *insn = &meta->insn; 1470d3d23fdbSJiong Wang u32 lopnd_max, ropnd_max; 1471d3d23fdbSJiong Wang u8 dst_reg; 1472d3d23fdbSJiong Wang 1473d3d23fdbSJiong Wang dst_reg = insn->dst_reg; 1474d3d23fdbSJiong Wang multiplicand = reg_a(dst_reg * 2); 1475d3d23fdbSJiong Wang dst_hi = reg_both(dst_reg * 2 + 1); 1476d3d23fdbSJiong Wang dst_lo = reg_both(dst_reg * 2); 1477d3d23fdbSJiong Wang lopnd_max = meta->umax_dst; 1478d3d23fdbSJiong Wang if (ropnd_from_reg) { 1479d3d23fdbSJiong Wang multiplier = reg_b(insn->src_reg * 2); 1480d3d23fdbSJiong Wang ropnd_max = meta->umax_src; 1481d3d23fdbSJiong Wang } else { 1482d3d23fdbSJiong Wang u32 imm = insn->imm; 1483d3d23fdbSJiong Wang 1484d3d23fdbSJiong Wang multiplier = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1485d3d23fdbSJiong Wang ropnd_max = imm; 1486d3d23fdbSJiong Wang } 1487d3d23fdbSJiong Wang if (lopnd_max > U16_MAX || ropnd_max > U16_MAX) 1488d3d23fdbSJiong Wang wrp_mul_u32(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier, 1489d3d23fdbSJiong Wang gen_high_half); 1490d3d23fdbSJiong Wang else 1491d3d23fdbSJiong Wang wrp_mul_u16(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier); 1492d3d23fdbSJiong Wang 1493d3d23fdbSJiong Wang return 0; 1494d3d23fdbSJiong Wang } 1495d3d23fdbSJiong Wang 14960d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 14970d49eaf4SJakub Kicinski { 14980d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 14990d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 15000d49eaf4SJakub Kicinski u32 ret_einval, end; 15010d49eaf4SJakub Kicinski 15020d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 15030d49eaf4SJakub Kicinski 15048231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 15058231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 15068231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 15078231f844SJakub Kicinski return -EINVAL; 15088231f844SJakub Kicinski 15098231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 15108231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 15118231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 15128231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 15138231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 15148231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 15158231f844SJakub Kicinski 15168231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 15178231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 15188231f844SJakub Kicinski 15198231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 15208231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 15218231f844SJakub Kicinski */ 15228231f844SJakub Kicinski 15238231f844SJakub Kicinski return 0; 15248231f844SJakub Kicinski } 15258231f844SJakub Kicinski 15260d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 15270d49eaf4SJakub Kicinski end = ret_einval + 2; 15280d49eaf4SJakub Kicinski 15290d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 15300d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 15310d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 15320d49eaf4SJakub Kicinski 15330d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 15340d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 15350d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 15360d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 15370d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 15380d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 15390d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 15400d49eaf4SJakub Kicinski 15410d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 15420d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 15430d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 15440d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 15450d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 15460d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 15470d49eaf4SJakub Kicinski 15480d49eaf4SJakub Kicinski /* Load the ret code */ 15490d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 15500d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 15510d49eaf4SJakub Kicinski 15520d49eaf4SJakub Kicinski /* Modify the packet metadata */ 15530d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 15540d49eaf4SJakub Kicinski 15550d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 15562314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 15570d49eaf4SJakub Kicinski 15580d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 15590d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 15600d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 15610d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 15620d49eaf4SJakub Kicinski 15630d49eaf4SJakub Kicinski /* return -EINVAL target */ 15640d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 15650d49eaf4SJakub Kicinski return -EINVAL; 15660d49eaf4SJakub Kicinski 15670d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 15680d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 15690d49eaf4SJakub Kicinski 15700d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 15710d49eaf4SJakub Kicinski return -EINVAL; 15720d49eaf4SJakub Kicinski 15730d49eaf4SJakub Kicinski return 0; 15740d49eaf4SJakub Kicinski } 15750d49eaf4SJakub Kicinski 157677a3d311SJakub Kicinski static int 1577fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 157877a3d311SJakub Kicinski { 157977a3d311SJakub Kicinski bool load_lm_ptr; 158077a3d311SJakub Kicinski u32 ret_tgt; 158177a3d311SJakub Kicinski s64 lm_off; 158277a3d311SJakub Kicinski 158377a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 158477a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 15852f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 15862f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 158777a3d311SJakub Kicinski 158877a3d311SJakub Kicinski /* Set LM0 to start of key */ 158977a3d311SJakub Kicinski if (load_lm_ptr) 159077a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 159144d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 159244d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 159377a3d311SJakub Kicinski 1594fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 159577a3d311SJakub Kicinski 2, RELO_BR_HELPER); 159677a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 159777a3d311SJakub Kicinski 159877a3d311SJakub Kicinski /* Load map ID into A0 */ 1599b4264c96SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), reg_a(2)); 160077a3d311SJakub Kicinski 160177a3d311SJakub Kicinski /* Load the return address into B0 */ 160277a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 160377a3d311SJakub Kicinski 160477a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 160577a3d311SJakub Kicinski return -EINVAL; 160677a3d311SJakub Kicinski 160777a3d311SJakub Kicinski /* Reset the LM0 pointer */ 160877a3d311SJakub Kicinski if (!load_lm_ptr) 160977a3d311SJakub Kicinski return 0; 161077a3d311SJakub Kicinski 161177a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 161277a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 161377a3d311SJakub Kicinski 161477a3d311SJakub Kicinski return 0; 161577a3d311SJakub Kicinski } 161677a3d311SJakub Kicinski 1617df4a37d8SJakub Kicinski static int 1618df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1619df4a37d8SJakub Kicinski { 1620df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1621df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1622df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1623df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1624df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1625df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1626df4a37d8SJakub Kicinski return 0; 1627df4a37d8SJakub Kicinski } 1628df4a37d8SJakub Kicinski 16299816dd35SJakub Kicinski static int 16309816dd35SJakub Kicinski nfp_perf_event_output(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16319816dd35SJakub Kicinski { 16329816dd35SJakub Kicinski swreg ptr_type; 16339816dd35SJakub Kicinski u32 ret_tgt; 16349816dd35SJakub Kicinski 16359816dd35SJakub Kicinski ptr_type = ur_load_imm_any(nfp_prog, meta->arg1.type, imm_a(nfp_prog)); 16369816dd35SJakub Kicinski 16379816dd35SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 16389816dd35SJakub Kicinski 16399816dd35SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 16409816dd35SJakub Kicinski 2, RELO_BR_HELPER); 16419816dd35SJakub Kicinski 16429816dd35SJakub Kicinski /* Load ptr type into A1 */ 16439816dd35SJakub Kicinski wrp_mov(nfp_prog, reg_a(1), ptr_type); 16449816dd35SJakub Kicinski 16459816dd35SJakub Kicinski /* Load the return address into B0 */ 16469816dd35SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 16479816dd35SJakub Kicinski 16489816dd35SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 16499816dd35SJakub Kicinski return -EINVAL; 16509816dd35SJakub Kicinski 16519816dd35SJakub Kicinski return 0; 16529816dd35SJakub Kicinski } 16539816dd35SJakub Kicinski 1654d985888fSJakub Kicinski static int 1655d985888fSJakub Kicinski nfp_queue_select(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1656d985888fSJakub Kicinski { 1657d985888fSJakub Kicinski u32 jmp_tgt; 1658d985888fSJakub Kicinski 1659d985888fSJakub Kicinski jmp_tgt = nfp_prog_current_offset(nfp_prog) + 5; 1660d985888fSJakub Kicinski 1661d985888fSJakub Kicinski /* Make sure the queue id fits into FW field */ 1662d985888fSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(meta->insn.src_reg * 2), 1663d985888fSJakub Kicinski ALU_OP_AND_NOT_B, reg_imm(0xff)); 1664d985888fSJakub Kicinski emit_br(nfp_prog, BR_BEQ, jmp_tgt, 2); 1665d985888fSJakub Kicinski 1666d985888fSJakub Kicinski /* Set the 'queue selected' bit and the queue value */ 1667d985888fSJakub Kicinski emit_shf(nfp_prog, pv_qsel_set(nfp_prog), 1668d985888fSJakub Kicinski pv_qsel_set(nfp_prog), SHF_OP_OR, reg_imm(1), 1669d985888fSJakub Kicinski SHF_SC_L_SHF, PKT_VEL_QSEL_SET_BIT); 1670d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1671d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_b(meta->insn.src_reg * 2), 1672d985888fSJakub Kicinski SHF_SC_NONE, 0); 1673d985888fSJakub Kicinski /* Delay slots end here, we will jump over next instruction if queue 1674d985888fSJakub Kicinski * value fits into the field. 1675d985888fSJakub Kicinski */ 1676d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1677d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_imm(NFP_NET_RXR_MAX), 1678d985888fSJakub Kicinski SHF_SC_NONE, 0); 1679d985888fSJakub Kicinski 1680d985888fSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, jmp_tgt)) 1681d985888fSJakub Kicinski return -EINVAL; 1682d985888fSJakub Kicinski 1683d985888fSJakub Kicinski return 0; 1684d985888fSJakub Kicinski } 1685d985888fSJakub Kicinski 1686d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1687d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1688d9ae7f2bSJakub Kicinski { 1689d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1690b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1691b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1692d9ae7f2bSJakub Kicinski 1693b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1694b14157eeSJakub Kicinski swreg stack_depth_reg; 1695b14157eeSJakub Kicinski 1696b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1697b14157eeSJakub Kicinski nfp_prog->stack_depth, 1698b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1699b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1700b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1701b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1702b14157eeSJakub Kicinski } else { 1703b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1704b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1705b14157eeSJakub Kicinski } 1706d9ae7f2bSJakub Kicinski 1707d9ae7f2bSJakub Kicinski return 0; 1708d9ae7f2bSJakub Kicinski } 1709d9ae7f2bSJakub Kicinski 1710d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1711d9ae7f2bSJakub Kicinski { 1712d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1713d9ae7f2bSJakub Kicinski 1714d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1715d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1716d9ae7f2bSJakub Kicinski 1717d9ae7f2bSJakub Kicinski return 0; 1718d9ae7f2bSJakub Kicinski } 1719d9ae7f2bSJakub Kicinski 1720d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1721d9ae7f2bSJakub Kicinski { 1722d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1723d9ae7f2bSJakub Kicinski } 1724d9ae7f2bSJakub Kicinski 1725d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1726d9ae7f2bSJakub Kicinski { 1727d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1728d9ae7f2bSJakub Kicinski } 1729d9ae7f2bSJakub Kicinski 1730d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1731d9ae7f2bSJakub Kicinski { 1732d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1733d9ae7f2bSJakub Kicinski } 1734d9ae7f2bSJakub Kicinski 1735d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1736d9ae7f2bSJakub Kicinski { 1737d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1738d9ae7f2bSJakub Kicinski } 1739d9ae7f2bSJakub Kicinski 1740d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1741d9ae7f2bSJakub Kicinski { 1742d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1743d9ae7f2bSJakub Kicinski } 1744d9ae7f2bSJakub Kicinski 1745d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1746d9ae7f2bSJakub Kicinski { 1747d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1748d9ae7f2bSJakub Kicinski } 1749d9ae7f2bSJakub Kicinski 1750d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1751d9ae7f2bSJakub Kicinski { 1752d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1753d9ae7f2bSJakub Kicinski 1754d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1755d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1756d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1757d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1758d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1759d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1760d9ae7f2bSJakub Kicinski 1761d9ae7f2bSJakub Kicinski return 0; 1762d9ae7f2bSJakub Kicinski } 1763d9ae7f2bSJakub Kicinski 1764d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1765d9ae7f2bSJakub Kicinski { 1766d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1767d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1768d9ae7f2bSJakub Kicinski 1769d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1770d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1771d9ae7f2bSJakub Kicinski 1772d9ae7f2bSJakub Kicinski return 0; 1773d9ae7f2bSJakub Kicinski } 1774d9ae7f2bSJakub Kicinski 1775d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1776d9ae7f2bSJakub Kicinski { 1777d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1778d9ae7f2bSJakub Kicinski 1779d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1780d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1781d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1782d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1783d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1784d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1785d9ae7f2bSJakub Kicinski 1786d9ae7f2bSJakub Kicinski return 0; 1787d9ae7f2bSJakub Kicinski } 1788d9ae7f2bSJakub Kicinski 1789d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1790d9ae7f2bSJakub Kicinski { 1791d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1792d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1793d9ae7f2bSJakub Kicinski 1794d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1795d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1796d9ae7f2bSJakub Kicinski 1797d9ae7f2bSJakub Kicinski return 0; 1798d9ae7f2bSJakub Kicinski } 1799d9ae7f2bSJakub Kicinski 1800d3d23fdbSJiong Wang static int mul_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1801d3d23fdbSJiong Wang { 1802d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, true); 1803d3d23fdbSJiong Wang } 1804d3d23fdbSJiong Wang 1805d3d23fdbSJiong Wang static int mul_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1806d3d23fdbSJiong Wang { 1807d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, false); 1808d3d23fdbSJiong Wang } 1809d3d23fdbSJiong Wang 1810254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1811254ef4d7SJiong Wang { 1812254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1813254ef4d7SJiong Wang 1814254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1815254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1816254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1817254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1818254ef4d7SJiong Wang 1819254ef4d7SJiong Wang return 0; 1820254ef4d7SJiong Wang } 1821254ef4d7SJiong Wang 1822991f5b36SJiong Wang /* Pseudo code: 1823991f5b36SJiong Wang * if shift_amt >= 32 1824991f5b36SJiong Wang * dst_high = dst_low << shift_amt[4:0] 1825991f5b36SJiong Wang * dst_low = 0; 1826991f5b36SJiong Wang * else 1827991f5b36SJiong Wang * dst_high = (dst_high, dst_low) >> (32 - shift_amt) 1828991f5b36SJiong Wang * dst_low = dst_low << shift_amt 1829991f5b36SJiong Wang * 1830991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1831991f5b36SJiong Wang */ 1832991f5b36SJiong Wang static int __shl_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1833991f5b36SJiong Wang { 1834991f5b36SJiong Wang if (shift_amt < 32) { 1835991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), 1836991f5b36SJiong Wang SHF_OP_NONE, reg_b(dst), SHF_SC_R_DSHF, 1837991f5b36SJiong Wang 32 - shift_amt); 1838991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1839991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 1840991f5b36SJiong Wang } else if (shift_amt == 32) { 1841991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst + 1, dst); 1842991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1843991f5b36SJiong Wang } else if (shift_amt > 32) { 1844991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1845991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt - 32); 1846991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1847991f5b36SJiong Wang } 1848991f5b36SJiong Wang 1849991f5b36SJiong Wang return 0; 1850991f5b36SJiong Wang } 1851991f5b36SJiong Wang 1852d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1853d9ae7f2bSJakub Kicinski { 1854d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 18553cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1856d9ae7f2bSJakub Kicinski 1857991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, insn->imm); 1858991f5b36SJiong Wang } 1859991f5b36SJiong Wang 1860991f5b36SJiong Wang static void shl_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1861991f5b36SJiong Wang { 1862991f5b36SJiong Wang emit_alu(nfp_prog, imm_both(nfp_prog), reg_imm(32), ALU_OP_SUB, 1863991f5b36SJiong Wang reg_b(src)); 1864991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, reg_imm(0)); 1865991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), SHF_OP_NONE, 1866991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 1867991f5b36SJiong Wang } 1868991f5b36SJiong Wang 1869991f5b36SJiong Wang /* NOTE: for indirect left shift, HIGH part should be calculated first. */ 1870991f5b36SJiong Wang static void shl_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1871991f5b36SJiong Wang { 1872991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1873991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1874991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 1875991f5b36SJiong Wang } 1876991f5b36SJiong Wang 1877991f5b36SJiong Wang static void shl_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1878991f5b36SJiong Wang { 1879991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 1880991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 1881991f5b36SJiong Wang } 1882991f5b36SJiong Wang 1883991f5b36SJiong Wang static void shl_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1884991f5b36SJiong Wang { 1885991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1886991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1887991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 18883cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1889991f5b36SJiong Wang } 1890991f5b36SJiong Wang 1891991f5b36SJiong Wang static int shl_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1892991f5b36SJiong Wang { 1893991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 1894991f5b36SJiong Wang u64 umin, umax; 1895991f5b36SJiong Wang u8 dst, src; 1896991f5b36SJiong Wang 1897991f5b36SJiong Wang dst = insn->dst_reg * 2; 1898662c5472SJiong Wang umin = meta->umin_src; 1899662c5472SJiong Wang umax = meta->umax_src; 1900991f5b36SJiong Wang if (umin == umax) 1901991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, umin); 1902991f5b36SJiong Wang 1903991f5b36SJiong Wang src = insn->src_reg * 2; 1904991f5b36SJiong Wang if (umax < 32) { 1905991f5b36SJiong Wang shl_reg64_lt32(nfp_prog, dst, src); 1906991f5b36SJiong Wang } else if (umin >= 32) { 1907991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 1908991f5b36SJiong Wang } else { 1909991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 1910991f5b36SJiong Wang * value of shift amount. 1911991f5b36SJiong Wang */ 1912991f5b36SJiong Wang u16 label_ge32, label_end; 1913991f5b36SJiong Wang 1914991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 7; 1915991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 1916991f5b36SJiong Wang 1917991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 1918991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 1919991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 1920991f5b36SJiong Wang /* shl_reg64_lt32_low packed in delay slot. */ 1921991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 1922991f5b36SJiong Wang 1923991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 1924991f5b36SJiong Wang return -EINVAL; 1925991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 1926991f5b36SJiong Wang 1927991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 1928991f5b36SJiong Wang return -EINVAL; 1929991f5b36SJiong Wang } 1930991f5b36SJiong Wang 1931991f5b36SJiong Wang return 0; 1932991f5b36SJiong Wang } 1933991f5b36SJiong Wang 1934991f5b36SJiong Wang /* Pseudo code: 1935991f5b36SJiong Wang * if shift_amt >= 32 1936991f5b36SJiong Wang * dst_high = 0; 1937991f5b36SJiong Wang * dst_low = dst_high >> shift_amt[4:0] 1938991f5b36SJiong Wang * else 1939991f5b36SJiong Wang * dst_high = dst_high >> shift_amt 1940991f5b36SJiong Wang * dst_low = (dst_high, dst_low) >> shift_amt 1941991f5b36SJiong Wang * 1942991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1943991f5b36SJiong Wang */ 1944991f5b36SJiong Wang static int __shr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1945991f5b36SJiong Wang { 1946991f5b36SJiong Wang if (shift_amt < 32) { 1947991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 1948991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 1949991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1950991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 1951991f5b36SJiong Wang } else if (shift_amt == 32) { 1952991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 1953991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1954991f5b36SJiong Wang } else if (shift_amt > 32) { 1955991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1956991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 1957991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 19583cae1319SJakub Kicinski } 1959d9ae7f2bSJakub Kicinski 1960d9ae7f2bSJakub Kicinski return 0; 1961d9ae7f2bSJakub Kicinski } 1962d9ae7f2bSJakub Kicinski 1963d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1964d9ae7f2bSJakub Kicinski { 1965d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 19663cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1967d9ae7f2bSJakub Kicinski 1968991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, insn->imm); 1969991f5b36SJiong Wang } 1970991f5b36SJiong Wang 1971991f5b36SJiong Wang /* NOTE: for indirect right shift, LOW part should be calculated first. */ 1972991f5b36SJiong Wang static void shr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1973991f5b36SJiong Wang { 1974991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1975991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1976991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 1977991f5b36SJiong Wang } 1978991f5b36SJiong Wang 1979991f5b36SJiong Wang static void shr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1980991f5b36SJiong Wang { 1981991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1982991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 1983991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 1984991f5b36SJiong Wang } 1985991f5b36SJiong Wang 1986991f5b36SJiong Wang static void shr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1987991f5b36SJiong Wang { 1988991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 1989991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 1990991f5b36SJiong Wang } 1991991f5b36SJiong Wang 1992991f5b36SJiong Wang static void shr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1993991f5b36SJiong Wang { 1994991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1995991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1996991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 19973cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1998991f5b36SJiong Wang } 1999991f5b36SJiong Wang 2000991f5b36SJiong Wang static int shr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2001991f5b36SJiong Wang { 2002991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2003991f5b36SJiong Wang u64 umin, umax; 2004991f5b36SJiong Wang u8 dst, src; 2005991f5b36SJiong Wang 2006991f5b36SJiong Wang dst = insn->dst_reg * 2; 2007662c5472SJiong Wang umin = meta->umin_src; 2008662c5472SJiong Wang umax = meta->umax_src; 2009991f5b36SJiong Wang if (umin == umax) 2010991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, umin); 2011991f5b36SJiong Wang 2012991f5b36SJiong Wang src = insn->src_reg * 2; 2013991f5b36SJiong Wang if (umax < 32) { 2014991f5b36SJiong Wang shr_reg64_lt32(nfp_prog, dst, src); 2015991f5b36SJiong Wang } else if (umin >= 32) { 2016991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2017991f5b36SJiong Wang } else { 2018991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2019991f5b36SJiong Wang * value of shift amount. 2020991f5b36SJiong Wang */ 2021991f5b36SJiong Wang u16 label_ge32, label_end; 2022991f5b36SJiong Wang 2023991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2024991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2025991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2026991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2027991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2028991f5b36SJiong Wang /* shr_reg64_lt32_high packed in delay slot. */ 2029991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2030991f5b36SJiong Wang 2031991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2032991f5b36SJiong Wang return -EINVAL; 2033991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2034991f5b36SJiong Wang 2035991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2036991f5b36SJiong Wang return -EINVAL; 20373cae1319SJakub Kicinski } 2038d9ae7f2bSJakub Kicinski 2039d9ae7f2bSJakub Kicinski return 0; 2040d9ae7f2bSJakub Kicinski } 2041d9ae7f2bSJakub Kicinski 2042f43d0f17SJiong Wang /* Code logic is the same as __shr_imm64 except ashr requires signedness bit 2043f43d0f17SJiong Wang * told through PREV_ALU result. 2044f43d0f17SJiong Wang */ 2045c217abccSJiong Wang static int __ashr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2046c217abccSJiong Wang { 2047c217abccSJiong Wang if (shift_amt < 32) { 2048c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2049c217abccSJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2050c217abccSJiong Wang /* Set signedness bit. */ 2051c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2052c217abccSJiong Wang reg_imm(0)); 2053c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2054c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2055c217abccSJiong Wang } else if (shift_amt == 32) { 2056c217abccSJiong Wang /* NOTE: this also helps setting signedness bit. */ 2057c217abccSJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2058c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2059c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2060c217abccSJiong Wang } else if (shift_amt > 32) { 2061c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2062c217abccSJiong Wang reg_imm(0)); 2063c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2064c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2065c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2066c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2067c217abccSJiong Wang } 2068c217abccSJiong Wang 2069c217abccSJiong Wang return 0; 2070c217abccSJiong Wang } 2071c217abccSJiong Wang 2072f43d0f17SJiong Wang static int ashr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2073f43d0f17SJiong Wang { 2074f43d0f17SJiong Wang const struct bpf_insn *insn = &meta->insn; 2075f43d0f17SJiong Wang u8 dst = insn->dst_reg * 2; 2076f43d0f17SJiong Wang 2077c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, insn->imm); 2078c217abccSJiong Wang } 2079c217abccSJiong Wang 2080c217abccSJiong Wang static void ashr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2081c217abccSJiong Wang { 2082c217abccSJiong Wang /* NOTE: the first insn will set both indirect shift amount (source A) 2083c217abccSJiong Wang * and signedness bit (MSB of result). 2084c217abccSJiong Wang */ 2085c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2086c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2087c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2088c217abccSJiong Wang } 2089c217abccSJiong Wang 2090c217abccSJiong Wang static void ashr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2091c217abccSJiong Wang { 2092c217abccSJiong Wang /* NOTE: it is the same as logic shift because we don't need to shift in 2093c217abccSJiong Wang * signedness bit when the shift amount is less than 32. 2094c217abccSJiong Wang */ 2095c217abccSJiong Wang return shr_reg64_lt32_low(nfp_prog, dst, src); 2096c217abccSJiong Wang } 2097c217abccSJiong Wang 2098c217abccSJiong Wang static void ashr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2099c217abccSJiong Wang { 2100c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2101c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2102c217abccSJiong Wang } 2103c217abccSJiong Wang 2104c217abccSJiong Wang static void ashr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2105c217abccSJiong Wang { 2106c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2107c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2108c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2109f43d0f17SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2110f43d0f17SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2111c217abccSJiong Wang } 2112c217abccSJiong Wang 2113c217abccSJiong Wang /* Like ashr_imm64, but need to use indirect shift. */ 2114c217abccSJiong Wang static int ashr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2115c217abccSJiong Wang { 2116c217abccSJiong Wang const struct bpf_insn *insn = &meta->insn; 2117c217abccSJiong Wang u64 umin, umax; 2118c217abccSJiong Wang u8 dst, src; 2119c217abccSJiong Wang 2120c217abccSJiong Wang dst = insn->dst_reg * 2; 2121662c5472SJiong Wang umin = meta->umin_src; 2122662c5472SJiong Wang umax = meta->umax_src; 2123c217abccSJiong Wang if (umin == umax) 2124c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, umin); 2125c217abccSJiong Wang 2126c217abccSJiong Wang src = insn->src_reg * 2; 2127c217abccSJiong Wang if (umax < 32) { 2128c217abccSJiong Wang ashr_reg64_lt32(nfp_prog, dst, src); 2129c217abccSJiong Wang } else if (umin >= 32) { 2130c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2131c217abccSJiong Wang } else { 2132c217abccSJiong Wang u16 label_ge32, label_end; 2133c217abccSJiong Wang 2134c217abccSJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2135c217abccSJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2136c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2137c217abccSJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2138c217abccSJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2139c217abccSJiong Wang /* ashr_reg64_lt32_high packed in delay slot. */ 2140c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2141c217abccSJiong Wang 2142c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2143c217abccSJiong Wang return -EINVAL; 2144c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2145c217abccSJiong Wang 2146c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2147c217abccSJiong Wang return -EINVAL; 2148f43d0f17SJiong Wang } 2149f43d0f17SJiong Wang 2150f43d0f17SJiong Wang return 0; 2151f43d0f17SJiong Wang } 2152f43d0f17SJiong Wang 2153d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2154d9ae7f2bSJakub Kicinski { 2155d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2156d9ae7f2bSJakub Kicinski 2157d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 2158d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2159d9ae7f2bSJakub Kicinski 2160d9ae7f2bSJakub Kicinski return 0; 2161d9ae7f2bSJakub Kicinski } 2162d9ae7f2bSJakub Kicinski 2163d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2164d9ae7f2bSJakub Kicinski { 2165d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2166d9ae7f2bSJakub Kicinski 2167d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 2168d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2169d9ae7f2bSJakub Kicinski 2170d9ae7f2bSJakub Kicinski return 0; 2171d9ae7f2bSJakub Kicinski } 2172d9ae7f2bSJakub Kicinski 2173d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2174d9ae7f2bSJakub Kicinski { 2175d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 2176d9ae7f2bSJakub Kicinski } 2177d9ae7f2bSJakub Kicinski 2178d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2179d9ae7f2bSJakub Kicinski { 2180d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 2181d9ae7f2bSJakub Kicinski } 2182d9ae7f2bSJakub Kicinski 2183d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2184d9ae7f2bSJakub Kicinski { 2185d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 2186d9ae7f2bSJakub Kicinski } 2187d9ae7f2bSJakub Kicinski 2188d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2189d9ae7f2bSJakub Kicinski { 2190d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 2191d9ae7f2bSJakub Kicinski } 2192d9ae7f2bSJakub Kicinski 2193d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2194d9ae7f2bSJakub Kicinski { 2195d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 2196d9ae7f2bSJakub Kicinski } 2197d9ae7f2bSJakub Kicinski 2198d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2199d9ae7f2bSJakub Kicinski { 2200d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 2201d9ae7f2bSJakub Kicinski } 2202d9ae7f2bSJakub Kicinski 2203d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2204d9ae7f2bSJakub Kicinski { 2205d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 2206d9ae7f2bSJakub Kicinski } 2207d9ae7f2bSJakub Kicinski 2208d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2209d9ae7f2bSJakub Kicinski { 2210d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 2211d9ae7f2bSJakub Kicinski } 2212d9ae7f2bSJakub Kicinski 2213d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2214d9ae7f2bSJakub Kicinski { 2215d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 2216d9ae7f2bSJakub Kicinski } 2217d9ae7f2bSJakub Kicinski 2218d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2219d9ae7f2bSJakub Kicinski { 2220d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 2221d9ae7f2bSJakub Kicinski } 2222d9ae7f2bSJakub Kicinski 2223d3d23fdbSJiong Wang static int mul_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2224d3d23fdbSJiong Wang { 2225d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, true); 2226d3d23fdbSJiong Wang } 2227d3d23fdbSJiong Wang 2228d3d23fdbSJiong Wang static int mul_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2229d3d23fdbSJiong Wang { 2230d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, false); 2231d3d23fdbSJiong Wang } 2232d3d23fdbSJiong Wang 2233254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2234254ef4d7SJiong Wang { 2235254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 2236254ef4d7SJiong Wang 2237254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 2238254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2239254ef4d7SJiong Wang 2240254ef4d7SJiong Wang return 0; 2241254ef4d7SJiong Wang } 2242254ef4d7SJiong Wang 2243d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2244d9ae7f2bSJakub Kicinski { 2245d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2246d9ae7f2bSJakub Kicinski 2247d9ae7f2bSJakub Kicinski if (!insn->imm) 2248d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 2249d9ae7f2bSJakub Kicinski 2250d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 2251d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 2252d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 2253d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2254d9ae7f2bSJakub Kicinski 2255d9ae7f2bSJakub Kicinski return 0; 2256d9ae7f2bSJakub Kicinski } 2257d9ae7f2bSJakub Kicinski 22583119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 22593119d1fdSJakub Kicinski { 22603119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 22613119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 22623119d1fdSJakub Kicinski 22633119d1fdSJakub Kicinski switch (insn->imm) { 22643119d1fdSJakub Kicinski case 16: 22653119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 22663119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 22673119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 22683119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 22693119d1fdSJakub Kicinski 22703119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 22713119d1fdSJakub Kicinski break; 22723119d1fdSJakub Kicinski case 32: 22733119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 22743119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 22753119d1fdSJakub Kicinski break; 22763119d1fdSJakub Kicinski case 64: 22773119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 22783119d1fdSJakub Kicinski 22793119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 22803119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 22813119d1fdSJakub Kicinski break; 22823119d1fdSJakub Kicinski } 22833119d1fdSJakub Kicinski 22843119d1fdSJakub Kicinski return 0; 22853119d1fdSJakub Kicinski } 22863119d1fdSJakub Kicinski 2287d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2288d9ae7f2bSJakub Kicinski { 22899f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 22909f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 22919f16c8abSJakub Kicinski u8 dst; 22929f16c8abSJakub Kicinski 22939f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 22949f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 22959f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 22969f16c8abSJakub Kicinski 22979f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 22989f16c8abSJakub Kicinski 22999f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 23009f16c8abSJakub Kicinski if (imm_hi == imm_lo) 23019f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 23029f16c8abSJakub Kicinski else 23039f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 2304d9ae7f2bSJakub Kicinski 2305d9ae7f2bSJakub Kicinski return 0; 2306d9ae7f2bSJakub Kicinski } 2307d9ae7f2bSJakub Kicinski 2308d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2309d9ae7f2bSJakub Kicinski { 2310d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 2311d9ae7f2bSJakub Kicinski return 0; 2312d9ae7f2bSJakub Kicinski } 2313d9ae7f2bSJakub Kicinski 2314d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2315d9ae7f2bSJakub Kicinski { 2316d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 2317d9ae7f2bSJakub Kicinski } 2318d9ae7f2bSJakub Kicinski 2319d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2320d9ae7f2bSJakub Kicinski { 2321d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 2322d9ae7f2bSJakub Kicinski } 2323d9ae7f2bSJakub Kicinski 2324d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2325d9ae7f2bSJakub Kicinski { 2326d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 2327d9ae7f2bSJakub Kicinski } 2328d9ae7f2bSJakub Kicinski 2329d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2330d9ae7f2bSJakub Kicinski { 2331d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 23320a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 2333d9ae7f2bSJakub Kicinski } 2334d9ae7f2bSJakub Kicinski 2335d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2336d9ae7f2bSJakub Kicinski { 2337d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 23380a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 2339d9ae7f2bSJakub Kicinski } 2340d9ae7f2bSJakub Kicinski 2341d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2342d9ae7f2bSJakub Kicinski { 2343d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 23440a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 2345d9ae7f2bSJakub Kicinski } 2346d9ae7f2bSJakub Kicinski 2347a82b23fbSJakub Kicinski static int 2348a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2349d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2350a82b23fbSJakub Kicinski { 2351d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2352b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 2353b14157eeSJakub Kicinski true, wrp_lmem_load); 2354a82b23fbSJakub Kicinski } 2355a82b23fbSJakub Kicinski 2356943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2357943c57b9SJakub Kicinski u8 size) 2358d9ae7f2bSJakub Kicinski { 2359bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2360bfddbc8aSJakub Kicinski 2361943c57b9SJakub Kicinski switch (meta->insn.off) { 2362c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 2363c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 2364943c57b9SJakub Kicinski return -EOPNOTSUPP; 2365bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 2366bfddbc8aSJakub Kicinski break; 2367c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 2368c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 2369bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2370bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2371bfddbc8aSJakub Kicinski break; 2372c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 2373c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 2374bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2375bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 2376bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2377943c57b9SJakub Kicinski break; 2378943c57b9SJakub Kicinski default: 2379d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2380943c57b9SJakub Kicinski } 2381943c57b9SJakub Kicinski 2382943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2383d9ae7f2bSJakub Kicinski 2384d9ae7f2bSJakub Kicinski return 0; 2385d9ae7f2bSJakub Kicinski } 2386d9ae7f2bSJakub Kicinski 2387943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2388943c57b9SJakub Kicinski u8 size) 2389d9ae7f2bSJakub Kicinski { 2390b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2391d9ae7f2bSJakub Kicinski 2392943c57b9SJakub Kicinski switch (meta->insn.off) { 2393c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 2394c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 2395c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2396c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2397943c57b9SJakub Kicinski break; 2398c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 2399c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 2400c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2401943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 2402943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2403943c57b9SJakub Kicinski break; 2404943c57b9SJakub Kicinski default: 2405943c57b9SJakub Kicinski return -EOPNOTSUPP; 2406943c57b9SJakub Kicinski } 2407d9ae7f2bSJakub Kicinski 2408943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2409d9ae7f2bSJakub Kicinski 2410d9ae7f2bSJakub Kicinski return 0; 2411d9ae7f2bSJakub Kicinski } 2412d9ae7f2bSJakub Kicinski 24132ca71441SJakub Kicinski static int 24142ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 24152ca71441SJakub Kicinski unsigned int size) 24162ca71441SJakub Kicinski { 24172ca71441SJakub Kicinski swreg tmp_reg; 24182ca71441SJakub Kicinski 24192ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 24202ca71441SJakub Kicinski 24213dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 24223dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 24233dd43c33SJakub Kicinski } 24243dd43c33SJakub Kicinski 24253dd43c33SJakub Kicinski static int 24263dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 24273dd43c33SJakub Kicinski unsigned int size) 24283dd43c33SJakub Kicinski { 24293dd43c33SJakub Kicinski swreg tmp_reg; 24303dd43c33SJakub Kicinski 24313dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 24323dd43c33SJakub Kicinski 24333dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 24343dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 24352ca71441SJakub Kicinski } 24362ca71441SJakub Kicinski 2437be759237SJiong Wang static void 2438be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 2439be759237SJiong Wang struct nfp_insn_meta *meta) 2440be759237SJiong Wang { 2441be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 2442be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 2443be759237SJiong Wang swreg src_base, off; 2444be759237SJiong Wang u8 xfer_num, len; 2445be759237SJiong Wang bool indir; 2446be759237SJiong Wang 2447be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 2448be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 2449be759237SJiong Wang len = range_end - range_start; 2450be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 2451be759237SJiong Wang 2452be759237SJiong Wang indir = len > 8 * REG_WIDTH; 2453be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 2454be759237SJiong Wang if (indir) 2455be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 2456be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 2457be759237SJiong Wang 2458be759237SJiong Wang /* Cache memory into transfer-in registers. */ 2459be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 2460b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 2461be759237SJiong Wang } 2462be759237SJiong Wang 2463be759237SJiong Wang static int 246491ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 246591ff69e8SJiong Wang struct nfp_insn_meta *meta, 246691ff69e8SJiong Wang unsigned int size) 246791ff69e8SJiong Wang { 246891ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 246991ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 247091ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 247191ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 247291ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 247391ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 247491ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 247591ff69e8SJiong Wang 247691ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 247791ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 247891ff69e8SJiong Wang src_lo = reg_xfer(idx); 247991ff69e8SJiong Wang 248091ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 248191ff69e8SJiong Wang if (size > REG_WIDTH - off) { 248291ff69e8SJiong Wang /* Calculate the part in the second register. */ 248391ff69e8SJiong Wang len_lo = REG_WIDTH - off; 248491ff69e8SJiong Wang len_mid = size - len_lo; 248591ff69e8SJiong Wang 248691ff69e8SJiong Wang /* Calculate the part in the third register. */ 248791ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 248891ff69e8SJiong Wang len_mid = REG_WIDTH; 248991ff69e8SJiong Wang } 249091ff69e8SJiong Wang 249191ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 249291ff69e8SJiong Wang 249391ff69e8SJiong Wang if (!len_mid) { 249491ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 249591ff69e8SJiong Wang return 0; 249691ff69e8SJiong Wang } 249791ff69e8SJiong Wang 249891ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 249991ff69e8SJiong Wang 250091ff69e8SJiong Wang if (size <= REG_WIDTH) { 250191ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 250291ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 250391ff69e8SJiong Wang } else { 250491ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 250591ff69e8SJiong Wang 250691ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 250791ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 250891ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 250991ff69e8SJiong Wang REG_WIDTH - len_lo); 251091ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 251191ff69e8SJiong Wang len_lo); 251291ff69e8SJiong Wang } 251391ff69e8SJiong Wang 251491ff69e8SJiong Wang return 0; 251591ff69e8SJiong Wang } 251691ff69e8SJiong Wang 251791ff69e8SJiong Wang static int 2518be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 2519be759237SJiong Wang struct nfp_insn_meta *meta, 2520be759237SJiong Wang unsigned int size) 2521be759237SJiong Wang { 2522be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 2523be759237SJiong Wang u8 dst_gpr, idx; 2524be759237SJiong Wang 2525be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 2526be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 2527be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 2528be759237SJiong Wang dst_lo = reg_both(dst_gpr); 2529be759237SJiong Wang src_lo = reg_xfer(idx); 2530be759237SJiong Wang 2531be759237SJiong Wang if (size < REG_WIDTH) { 2532be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 2533be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2534be759237SJiong Wang } else if (size == REG_WIDTH) { 2535be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2536be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2537be759237SJiong Wang } else { 2538be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 2539be759237SJiong Wang 2540be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2541be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 2542be759237SJiong Wang } 2543be759237SJiong Wang 2544be759237SJiong Wang return 0; 2545be759237SJiong Wang } 2546be759237SJiong Wang 2547be759237SJiong Wang static int 2548be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 2549be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 2550be759237SJiong Wang { 2551be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 2552be759237SJiong Wang 255391ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 2554be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 255591ff69e8SJiong Wang 255691ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 2557be759237SJiong Wang } 2558be759237SJiong Wang 25592ca71441SJakub Kicinski static int 25602ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 25612ca71441SJakub Kicinski unsigned int size) 25622ca71441SJakub Kicinski { 25639879a381SJiong Wang if (meta->ldst_gather_len) 25649879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 25659879a381SJiong Wang 25662ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2567012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 25682ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 25692ca71441SJakub Kicinski else 25702ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 25712ca71441SJakub Kicinski } 25722ca71441SJakub Kicinski 2573be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2574be759237SJiong Wang if (meta->pkt_cache.range_end) { 2575be759237SJiong Wang if (meta->pkt_cache.do_init) 2576be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2577be759237SJiong Wang 2578be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2579be759237SJiong Wang } else { 25802ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2581be759237SJiong Wang } 2582be759237SJiong Wang } 25832ca71441SJakub Kicinski 2584a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2585d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2586d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2587a82b23fbSJakub Kicinski 25883dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 25893dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 25903dd43c33SJakub Kicinski 25912ca71441SJakub Kicinski return -EOPNOTSUPP; 25922ca71441SJakub Kicinski } 25932ca71441SJakub Kicinski 25942ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 25952ca71441SJakub Kicinski { 25962ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 25972ca71441SJakub Kicinski } 25982ca71441SJakub Kicinski 25992ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 26002ca71441SJakub Kicinski { 26012ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 26022ca71441SJakub Kicinski } 26032ca71441SJakub Kicinski 2604d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2605d9ae7f2bSJakub Kicinski { 26062ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 26072ca71441SJakub Kicinski } 26082ca71441SJakub Kicinski 26092ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 26102ca71441SJakub Kicinski { 26112ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2612d9ae7f2bSJakub Kicinski } 2613d9ae7f2bSJakub Kicinski 2614e663fe38SJakub Kicinski static int 2615e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2616e663fe38SJakub Kicinski unsigned int size) 2617d9ae7f2bSJakub Kicinski { 2618e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2619e663fe38SJakub Kicinski swreg off_reg; 2620e663fe38SJakub Kicinski 2621e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2622e663fe38SJakub Kicinski 2623e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2624e663fe38SJakub Kicinski imm, size); 2625e663fe38SJakub Kicinski } 2626e663fe38SJakub Kicinski 2627e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2628e663fe38SJakub Kicinski unsigned int size) 2629e663fe38SJakub Kicinski { 2630e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2631e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2632e663fe38SJakub Kicinski 2633d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2634d9ae7f2bSJakub Kicinski } 2635d9ae7f2bSJakub Kicinski 2636e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2637d9ae7f2bSJakub Kicinski { 2638e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2639e663fe38SJakub Kicinski } 2640e663fe38SJakub Kicinski 2641e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2642e663fe38SJakub Kicinski { 2643e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2644e663fe38SJakub Kicinski } 2645e663fe38SJakub Kicinski 2646e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2647e663fe38SJakub Kicinski { 2648e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2649e663fe38SJakub Kicinski } 2650e663fe38SJakub Kicinski 2651e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2652e663fe38SJakub Kicinski { 2653e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2654e663fe38SJakub Kicinski } 2655e663fe38SJakub Kicinski 2656e663fe38SJakub Kicinski static int 2657e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2658e663fe38SJakub Kicinski unsigned int size) 2659e663fe38SJakub Kicinski { 2660e663fe38SJakub Kicinski swreg off_reg; 2661e663fe38SJakub Kicinski 2662e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2663e663fe38SJakub Kicinski 2664e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2665e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2666e663fe38SJakub Kicinski } 2667e663fe38SJakub Kicinski 2668e663fe38SJakub Kicinski static int 2669ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2670d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2671ee9133a8SJakub Kicinski { 2672d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2673b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2674b14157eeSJakub Kicinski false, wrp_lmem_store); 2675ee9133a8SJakub Kicinski } 2676ee9133a8SJakub Kicinski 2677d985888fSJakub Kicinski static int mem_stx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2678d985888fSJakub Kicinski { 2679d985888fSJakub Kicinski switch (meta->insn.off) { 2680d985888fSJakub Kicinski case offsetof(struct xdp_md, rx_queue_index): 2681d985888fSJakub Kicinski return nfp_queue_select(nfp_prog, meta); 2682d985888fSJakub Kicinski } 2683d985888fSJakub Kicinski 2684d985888fSJakub Kicinski WARN_ON_ONCE(1); /* verifier should have rejected bad accesses */ 2685d985888fSJakub Kicinski return -EOPNOTSUPP; 2686d985888fSJakub Kicinski } 2687d985888fSJakub Kicinski 2688ee9133a8SJakub Kicinski static int 2689e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2690e663fe38SJakub Kicinski unsigned int size) 2691e663fe38SJakub Kicinski { 2692e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2693e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2694e663fe38SJakub Kicinski 2695ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2696d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2697d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2698ee9133a8SJakub Kicinski 2699d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2700d9ae7f2bSJakub Kicinski } 2701d9ae7f2bSJakub Kicinski 2702e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2703e663fe38SJakub Kicinski { 2704e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2705e663fe38SJakub Kicinski } 2706e663fe38SJakub Kicinski 2707e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2708e663fe38SJakub Kicinski { 2709e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2710e663fe38SJakub Kicinski } 2711e663fe38SJakub Kicinski 2712d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2713d9ae7f2bSJakub Kicinski { 2714d985888fSJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) 2715d985888fSJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 2716d985888fSJakub Kicinski return mem_stx_xdp(nfp_prog, meta); 2717e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2718e663fe38SJakub Kicinski } 27192ca71441SJakub Kicinski 2720e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2721e663fe38SJakub Kicinski { 2722e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2723d9ae7f2bSJakub Kicinski } 2724d9ae7f2bSJakub Kicinski 2725dcb0c27fSJakub Kicinski static int 2726dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2727dcb0c27fSJakub Kicinski { 2728dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2729dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 273041aed09cSJakub Kicinski unsigned int full_add, out; 273141aed09cSJakub Kicinski swreg addra, addrb, off; 2732dcb0c27fSJakub Kicinski 2733dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2734dcb0c27fSJakub Kicinski 273541aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 273641aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 273741aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 273841aed09cSJakub Kicinski * code for both. 273941aed09cSJakub Kicinski */ 274041aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 274141aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 274241aed09cSJakub Kicinski 274341aed09cSJakub Kicinski if (meta->insn.off) { 274441aed09cSJakub Kicinski out += 2; 274541aed09cSJakub Kicinski full_add += 2; 274641aed09cSJakub Kicinski } 274741aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 274841aed09cSJakub Kicinski out += 3; 274941aed09cSJakub Kicinski full_add += 3; 275041aed09cSJakub Kicinski } 275141aed09cSJakub Kicinski if (meta->xadd_over_16bit) 275241aed09cSJakub Kicinski out += 2 + is64; 275341aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 275441aed09cSJakub Kicinski out += 5; 275541aed09cSJakub Kicinski full_add += 5; 275641aed09cSJakub Kicinski } 275741aed09cSJakub Kicinski 275841aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 275941aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 276041aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 276141aed09cSJakub Kicinski 276241aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 276341aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 276441aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 276541aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 276641aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 276741aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 276841aed09cSJakub Kicinski /* defer for add */ 276941aed09cSJakub Kicinski } 277041aed09cSJakub Kicinski 2771dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2772dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2773dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2774dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2775dcb0c27fSJakub Kicinski } else { 2776dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2777dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2778dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2779dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2780dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2781dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2782dcb0c27fSJakub Kicinski } 2783dcb0c27fSJakub Kicinski 278441aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 278541aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 278641aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 278741aed09cSJakub Kicinski 2788dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2789dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2790dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2791dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2792dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2793dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2794b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2795dcb0c27fSJakub Kicinski 279641aed09cSJakub Kicinski if (meta->xadd_over_16bit) 279741aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 279841aed09cSJakub Kicinski } 279941aed09cSJakub Kicinski 280041aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 280141aed09cSJakub Kicinski return -EINVAL; 280241aed09cSJakub Kicinski 280341aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 280441aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 280541aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 280641aed09cSJakub Kicinski addra, addrb, is64 << 2, 280741aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 280841aed09cSJakub Kicinski 280941aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 281041aed09cSJakub Kicinski if (is64) 281141aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 281241aed09cSJakub Kicinski } 281341aed09cSJakub Kicinski 281441aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 281541aed09cSJakub Kicinski return -EINVAL; 281641aed09cSJakub Kicinski 2817dcb0c27fSJakub Kicinski return 0; 2818dcb0c27fSJakub Kicinski } 2819dcb0c27fSJakub Kicinski 2820dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2821dcb0c27fSJakub Kicinski { 2822dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2823dcb0c27fSJakub Kicinski } 2824dcb0c27fSJakub Kicinski 2825dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2826dcb0c27fSJakub Kicinski { 2827dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2828dcb0c27fSJakub Kicinski } 2829dcb0c27fSJakub Kicinski 2830d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2831d9ae7f2bSJakub Kicinski { 2832d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2833d9ae7f2bSJakub Kicinski 2834d9ae7f2bSJakub Kicinski return 0; 2835d9ae7f2bSJakub Kicinski } 2836d9ae7f2bSJakub Kicinski 2837d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2838d9ae7f2bSJakub Kicinski { 2839d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2840d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2841b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2842b3f868dfSJakub Kicinski 2843b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2844b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2845d9ae7f2bSJakub Kicinski 2846d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2847d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2848d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2849d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2850d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2851d9ae7f2bSJakub Kicinski } 2852d9ae7f2bSJakub Kicinski 2853d9ae7f2bSJakub Kicinski if (imm >> 32) { 2854d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2855d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2856d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2857d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2858d9ae7f2bSJakub Kicinski } 2859d9ae7f2bSJakub Kicinski 2860d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2861d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2862d9ae7f2bSJakub Kicinski 2863d9ae7f2bSJakub Kicinski return 0; 2864d9ae7f2bSJakub Kicinski } 2865d9ae7f2bSJakub Kicinski 2866d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2867d9ae7f2bSJakub Kicinski { 2868d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2869d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2870b3f868dfSJakub Kicinski swreg tmp_reg; 2871d9ae7f2bSJakub Kicinski 2872d9ae7f2bSJakub Kicinski if (!imm) { 2873d9ae7f2bSJakub Kicinski meta->skip = true; 2874d9ae7f2bSJakub Kicinski return 0; 2875d9ae7f2bSJakub Kicinski } 2876d9ae7f2bSJakub Kicinski 2877d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2878d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2879d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2880d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2881d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2882d9ae7f2bSJakub Kicinski } 2883d9ae7f2bSJakub Kicinski 2884d9ae7f2bSJakub Kicinski if (imm >> 32) { 2885d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2886d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2887d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2888d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2889d9ae7f2bSJakub Kicinski } 2890d9ae7f2bSJakub Kicinski 2891d9ae7f2bSJakub Kicinski return 0; 2892d9ae7f2bSJakub Kicinski } 2893d9ae7f2bSJakub Kicinski 2894d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2895d9ae7f2bSJakub Kicinski { 2896d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2897d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2898b3f868dfSJakub Kicinski swreg tmp_reg; 2899d9ae7f2bSJakub Kicinski 2900d9ae7f2bSJakub Kicinski if (!imm) { 2901d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2902d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2903d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 290482837370SJakub Kicinski return 0; 2905d9ae7f2bSJakub Kicinski } 2906d9ae7f2bSJakub Kicinski 2907d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2908d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2909d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2910d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2911d9ae7f2bSJakub Kicinski 2912d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2913d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2914d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2915d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2916d9ae7f2bSJakub Kicinski 2917d9ae7f2bSJakub Kicinski return 0; 2918d9ae7f2bSJakub Kicinski } 2919d9ae7f2bSJakub Kicinski 2920d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2921d9ae7f2bSJakub Kicinski { 2922d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2923d9ae7f2bSJakub Kicinski 2924d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2925d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2926d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2927d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2928d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2929d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2930d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2931d9ae7f2bSJakub Kicinski 2932d9ae7f2bSJakub Kicinski return 0; 2933d9ae7f2bSJakub Kicinski } 2934d9ae7f2bSJakub Kicinski 2935d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2936d9ae7f2bSJakub Kicinski { 2937d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2938d9ae7f2bSJakub Kicinski } 2939d9ae7f2bSJakub Kicinski 2940d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2941d9ae7f2bSJakub Kicinski { 2942d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2943d9ae7f2bSJakub Kicinski } 2944d9ae7f2bSJakub Kicinski 29452cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 29462cb230bdSJakub Kicinski { 29472cb230bdSJakub Kicinski switch (meta->insn.imm) { 29480d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 29490d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 295077a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 295144d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 2952bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 2953fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 2954df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 2955df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 29569816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 29579816dd35SJakub Kicinski return nfp_perf_event_output(nfp_prog, meta); 29582cb230bdSJakub Kicinski default: 29592cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 29602cb230bdSJakub Kicinski return -EOPNOTSUPP; 29612cb230bdSJakub Kicinski } 29622cb230bdSJakub Kicinski } 29632cb230bdSJakub Kicinski 2964d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2965d9ae7f2bSJakub Kicinski { 2966e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2967d9ae7f2bSJakub Kicinski 2968d9ae7f2bSJakub Kicinski return 0; 2969d9ae7f2bSJakub Kicinski } 2970d9ae7f2bSJakub Kicinski 2971d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2972d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2973d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2974d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2975d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2976d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2977d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2978d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2979d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2980d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2981d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2982d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2983d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2984d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_X] = mul_reg64, 2985d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_K] = mul_imm64, 2986254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2987991f5b36SJiong Wang [BPF_ALU64 | BPF_LSH | BPF_X] = shl_reg64, 2988d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2989991f5b36SJiong Wang [BPF_ALU64 | BPF_RSH | BPF_X] = shr_reg64, 2990d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2991c217abccSJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_X] = ashr_reg64, 2992f43d0f17SJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_K] = ashr_imm64, 2993d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2994d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2995d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2996d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2997d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2998d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2999d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 3000d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 3001d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 3002d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 3003d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 3004d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 3005d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_X] = mul_reg, 3006d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_K] = mul_imm, 3007254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 3008d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 30093119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 3010d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 3011d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 3012d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 3013d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 3014d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 3015d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 3016d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 30172ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 30182ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 3019d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 30202ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 3021e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 3022e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 3023d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 3024e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 3025dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 3026dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 3027e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 3028e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 3029e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 3030e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 3031d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 3032d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 303361dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = cmp_imm, 303461dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = cmp_imm, 303561dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_K] = cmp_imm, 303661dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_K] = cmp_imm, 303761dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_K] = cmp_imm, 303861dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_K] = cmp_imm, 303961dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_K] = cmp_imm, 304061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_K] = cmp_imm, 3041d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 3042d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 3043d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 304461dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = cmp_reg, 304561dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = cmp_reg, 304661dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_X] = cmp_reg, 304761dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_X] = cmp_reg, 304861dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_X] = cmp_reg, 304961dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_X] = cmp_reg, 305061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_X] = cmp_reg, 305161dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_X] = cmp_reg, 3052d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 3053d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 30542cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 3055d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 3056d9ae7f2bSJakub Kicinski }; 3057d9ae7f2bSJakub Kicinski 3058d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 3059d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 3060d9ae7f2bSJakub Kicinski { 30615b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 3062854dc87dSJiong Wang u32 idx, br_idx; 3063d9ae7f2bSJakub Kicinski 3064854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 3065d9ae7f2bSJakub Kicinski if (meta->skip) 3066d9ae7f2bSJakub Kicinski continue; 30672cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 30682cb230bdSJakub Kicinski continue; 3069d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 3070d9ae7f2bSJakub Kicinski continue; 3071d9ae7f2bSJakub Kicinski 30725b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 30732314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 30745b674140SJiong Wang else 30752314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 3076854dc87dSJiong Wang 3077d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 3078d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 3079d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 3080d9ae7f2bSJakub Kicinski return -ELOOP; 3081d9ae7f2bSJakub Kicinski } 3082d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 30832314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 30842314fe9eSJakub Kicinski RELO_BR_REL) 3085d9ae7f2bSJakub Kicinski continue; 3086d9ae7f2bSJakub Kicinski 30875b674140SJiong Wang if (!meta->jmp_dst) { 30885b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 3089d9ae7f2bSJakub Kicinski return -ELOOP; 3090d9ae7f2bSJakub Kicinski } 3091d9ae7f2bSJakub Kicinski 30925b674140SJiong Wang jmp_dst = meta->jmp_dst; 3093854dc87dSJiong Wang 30945b674140SJiong Wang if (jmp_dst->skip) { 3095d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 3096d9ae7f2bSJakub Kicinski return -ELOOP; 3097d9ae7f2bSJakub Kicinski } 3098d9ae7f2bSJakub Kicinski 30992314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 3100d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 3101d9ae7f2bSJakub Kicinski continue; 31025b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 3103d9ae7f2bSJakub Kicinski } 3104d9ae7f2bSJakub Kicinski } 3105d9ae7f2bSJakub Kicinski 3106d9ae7f2bSJakub Kicinski return 0; 3107d9ae7f2bSJakub Kicinski } 3108d9ae7f2bSJakub Kicinski 3109d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 3110d9ae7f2bSJakub Kicinski { 311118e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 311218e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 311318e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 3114d9ae7f2bSJakub Kicinski } 3115d9ae7f2bSJakub Kicinski 3116d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 3117d9ae7f2bSJakub Kicinski { 3118d9ae7f2bSJakub Kicinski /* TC direct-action mode: 3119d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 3120d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 3121d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 3122d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 3123d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 3124d9ae7f2bSJakub Kicinski * 3125d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 3126d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 3127d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 3128d9ae7f2bSJakub Kicinski * packets up the stack. 3129d9ae7f2bSJakub Kicinski */ 3130d9ae7f2bSJakub Kicinski /* Target for aborts */ 3131d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3132d9ae7f2bSJakub Kicinski 3133e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3134d9ae7f2bSJakub Kicinski 3135c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3136d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 3137d9ae7f2bSJakub Kicinski 3138d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3139d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3140d9ae7f2bSJakub Kicinski 3141d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 3142d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 3143d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3144c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3145d9ae7f2bSJakub Kicinski 3146d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 3147d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 3148d9ae7f2bSJakub Kicinski 3149d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3150d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 3151d9ae7f2bSJakub Kicinski 3152d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3153d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 3154d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3155d9ae7f2bSJakub Kicinski 3156d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3157d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3158d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 3159d9ae7f2bSJakub Kicinski 3160e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3161d9ae7f2bSJakub Kicinski 3162d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3163d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 3164d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3165d9ae7f2bSJakub Kicinski } 3166d9ae7f2bSJakub Kicinski 3167d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 3168d9ae7f2bSJakub Kicinski { 3169d9ae7f2bSJakub Kicinski /* XDP return codes: 3170d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 3171d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 3172d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 3173d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 3174d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 3175d9ae7f2bSJakub Kicinski */ 3176d9ae7f2bSJakub Kicinski /* Target for aborts */ 3177d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3178d9ae7f2bSJakub Kicinski 3179e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3180d9ae7f2bSJakub Kicinski 3181c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3182d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 3183d9ae7f2bSJakub Kicinski 3184d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3185d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3186d9ae7f2bSJakub Kicinski 3187d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 3188d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 3189d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3190d9ae7f2bSJakub Kicinski 3191d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 3192d9ae7f2bSJakub Kicinski 3193d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3194d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 3195d9ae7f2bSJakub Kicinski 3196d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3197d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3198d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3199d9ae7f2bSJakub Kicinski 3200e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3201d9ae7f2bSJakub Kicinski 3202c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3203d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3204d9ae7f2bSJakub Kicinski } 3205d9ae7f2bSJakub Kicinski 3206d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 3207d9ae7f2bSJakub Kicinski { 3208012bb8a8SJakub Kicinski switch (nfp_prog->type) { 3209012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 3210d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 3211d9ae7f2bSJakub Kicinski break; 3212012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 3213d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 3214d9ae7f2bSJakub Kicinski break; 3215012bb8a8SJakub Kicinski default: 3216012bb8a8SJakub Kicinski WARN_ON(1); 3217d9ae7f2bSJakub Kicinski } 3218d9ae7f2bSJakub Kicinski } 3219d9ae7f2bSJakub Kicinski 3220d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 3221d9ae7f2bSJakub Kicinski { 3222d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3223ff42bb9fSJakub Kicinski int err; 3224d9ae7f2bSJakub Kicinski 3225d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 3226d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3227d9ae7f2bSJakub Kicinski return nfp_prog->error; 3228d9ae7f2bSJakub Kicinski 3229d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3230d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 3231d9ae7f2bSJakub Kicinski 3232d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 3233d9ae7f2bSJakub Kicinski 3234d9ae7f2bSJakub Kicinski if (meta->skip) { 3235d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3236d9ae7f2bSJakub Kicinski continue; 3237d9ae7f2bSJakub Kicinski } 3238d9ae7f2bSJakub Kicinski 3239d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 3240d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 3241d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 3242d9ae7f2bSJakub Kicinski if (!cb) 3243d9ae7f2bSJakub Kicinski return -ENOENT; 3244d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 3245d9ae7f2bSJakub Kicinski if (err) 3246d9ae7f2bSJakub Kicinski return err; 3247e8a4796eSJakub Kicinski if (nfp_prog->error) 3248e8a4796eSJakub Kicinski return nfp_prog->error; 3249d9ae7f2bSJakub Kicinski 3250d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3251d9ae7f2bSJakub Kicinski } 3252d9ae7f2bSJakub Kicinski 3253854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 3254854dc87dSJiong Wang 3255d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 3256d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3257d9ae7f2bSJakub Kicinski return nfp_prog->error; 3258d9ae7f2bSJakub Kicinski 3259ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 32601c03e03fSJakub Kicinski if (nfp_prog->error) 32611c03e03fSJakub Kicinski return nfp_prog->error; 32621c03e03fSJakub Kicinski 3263d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 3264d9ae7f2bSJakub Kicinski } 3265d9ae7f2bSJakub Kicinski 3266d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 3267d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 3268d9ae7f2bSJakub Kicinski { 3269d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3270d9ae7f2bSJakub Kicinski 3271d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3272d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 3273d9ae7f2bSJakub Kicinski 3274d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 3275d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 3276d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 3277d9ae7f2bSJakub Kicinski continue; 3278d9ae7f2bSJakub Kicinski 3279d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 3280d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 3281d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 3282d9ae7f2bSJakub Kicinski meta->skip = true; 3283d9ae7f2bSJakub Kicinski 3284d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 3285d9ae7f2bSJakub Kicinski if (!meta->skip) 3286d9ae7f2bSJakub Kicinski return; 3287d9ae7f2bSJakub Kicinski } 3288d9ae7f2bSJakub Kicinski } 3289d9ae7f2bSJakub Kicinski 32906c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 32916c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 32926c59500cSJakub Kicinski */ 32936c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 32946c59500cSJakub Kicinski { 32956c59500cSJakub Kicinski struct nfp_insn_meta *meta; 32966c59500cSJakub Kicinski 32976c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 32986c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 32996c59500cSJakub Kicinski 33006c59500cSJakub Kicinski if (meta->skip) 33016c59500cSJakub Kicinski continue; 33026c59500cSJakub Kicinski 33036c59500cSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_ALU && 33047bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_ALU64 && 33057bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_JMP) 33066c59500cSJakub Kicinski continue; 33076c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 33086c59500cSJakub Kicinski continue; 33096c59500cSJakub Kicinski if (insn.imm >= 0) 33106c59500cSJakub Kicinski continue; 33116c59500cSJakub Kicinski 33127bdc97beSJakub Kicinski if (BPF_CLASS(insn.code) == BPF_JMP) { 33137bdc97beSJakub Kicinski switch (BPF_OP(insn.code)) { 33147bdc97beSJakub Kicinski case BPF_JGE: 33157bdc97beSJakub Kicinski case BPF_JSGE: 33167bdc97beSJakub Kicinski case BPF_JLT: 33177bdc97beSJakub Kicinski case BPF_JSLT: 33187bdc97beSJakub Kicinski meta->jump_neg_op = true; 33197bdc97beSJakub Kicinski break; 33207bdc97beSJakub Kicinski default: 33217bdc97beSJakub Kicinski continue; 33227bdc97beSJakub Kicinski } 33237bdc97beSJakub Kicinski } else { 33246c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 33256c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 33266c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 33276c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 33286c59500cSJakub Kicinski else 33296c59500cSJakub Kicinski continue; 33306c59500cSJakub Kicinski 33316c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 33327bdc97beSJakub Kicinski } 33336c59500cSJakub Kicinski 33346c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 33356c59500cSJakub Kicinski } 33366c59500cSJakub Kicinski } 33376c59500cSJakub Kicinski 3338d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 3339d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 3340d9ae7f2bSJakub Kicinski { 3341d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3342d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 3343d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 3344d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 3345d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 3346d9ae7f2bSJakub Kicinski }; 3347d9ae7f2bSJakub Kicinski 3348d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3349d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 3350d9ae7f2bSJakub Kicinski 3351d9ae7f2bSJakub Kicinski insn = meta1->insn; 3352d9ae7f2bSJakub Kicinski next = meta2->insn; 3353d9ae7f2bSJakub Kicinski 3354d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3355d9ae7f2bSJakub Kicinski continue; 3356d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3357d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3358d9ae7f2bSJakub Kicinski continue; 3359d9ae7f2bSJakub Kicinski 3360d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 3361d9ae7f2bSJakub Kicinski continue; 3362d9ae7f2bSJakub Kicinski 3363d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 3364d9ae7f2bSJakub Kicinski continue; 3365d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 3366d9ae7f2bSJakub Kicinski continue; 3367d9ae7f2bSJakub Kicinski 3368d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 3369d9ae7f2bSJakub Kicinski continue; 3370d9ae7f2bSJakub Kicinski 33711266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 33721266f5d6SJiong Wang continue; 33731266f5d6SJiong Wang 3374d9ae7f2bSJakub Kicinski meta2->skip = true; 3375d9ae7f2bSJakub Kicinski } 3376d9ae7f2bSJakub Kicinski } 3377d9ae7f2bSJakub Kicinski 3378d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 3379d9ae7f2bSJakub Kicinski { 3380d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 3381d9ae7f2bSJakub Kicinski 3382d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 3383d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 3384d9ae7f2bSJakub Kicinski 3385d9ae7f2bSJakub Kicinski insn = meta1->insn; 3386d9ae7f2bSJakub Kicinski next1 = meta2->insn; 3387d9ae7f2bSJakub Kicinski next2 = meta3->insn; 3388d9ae7f2bSJakub Kicinski 3389d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3390d9ae7f2bSJakub Kicinski continue; 3391d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3392d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3393d9ae7f2bSJakub Kicinski continue; 3394d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 3395d9ae7f2bSJakub Kicinski continue; 3396d9ae7f2bSJakub Kicinski 3397d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 3398d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 3399d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 3400d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 3401d9ae7f2bSJakub Kicinski continue; 3402d9ae7f2bSJakub Kicinski 3403d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 3404d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 3405d9ae7f2bSJakub Kicinski continue; 3406d9ae7f2bSJakub Kicinski 3407d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 3408d9ae7f2bSJakub Kicinski continue; 3409d9ae7f2bSJakub Kicinski 341029fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 341129fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 341229fe46efSJiong Wang continue; 341329fe46efSJiong Wang 3414d9ae7f2bSJakub Kicinski meta2->skip = true; 3415d9ae7f2bSJakub Kicinski meta3->skip = true; 3416d9ae7f2bSJakub Kicinski } 3417d9ae7f2bSJakub Kicinski } 3418d9ae7f2bSJakub Kicinski 34196bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 34206bc7103cSJiong Wang * 34216bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 34226bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 34236bc7103cSJiong Wang * 34246bc7103cSJiong Wang * The destination register of load and source register of store should 34256bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 34266bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 34276bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 34286bc7103cSJiong Wang */ 34296bc7103cSJiong Wang static bool 34306bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 34316bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 34326bc7103cSJiong Wang { 34336bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 34346bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 34356bc7103cSJiong Wang 34366bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 34376bc7103cSJiong Wang return false; 34386bc7103cSJiong Wang 3439cc0dff6dSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET && 3440cc0dff6dSJiong Wang ld_meta->ptr.type != PTR_TO_MAP_VALUE) 34416bc7103cSJiong Wang return false; 34426bc7103cSJiong Wang 34436bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 34446bc7103cSJiong Wang return false; 34456bc7103cSJiong Wang 34466bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 34476bc7103cSJiong Wang return false; 34486bc7103cSJiong Wang 34496bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 34506bc7103cSJiong Wang return false; 34516bc7103cSJiong Wang 34526bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 34536bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 34546bc7103cSJiong Wang return false; 34556bc7103cSJiong Wang 34566bc7103cSJiong Wang return true; 34576bc7103cSJiong Wang } 34586bc7103cSJiong Wang 34596bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 34606bc7103cSJiong Wang * 34616bc7103cSJiong Wang * - Their address base registers are the same. 34626bc7103cSJiong Wang * - Their address offsets are in the same order. 34636bc7103cSJiong Wang * - They operate at the same memory width. 34646bc7103cSJiong Wang * - There is no jump into the middle of them. 34656bc7103cSJiong Wang */ 34666bc7103cSJiong Wang static bool 34676bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 34686bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 34696bc7103cSJiong Wang struct bpf_insn *prev_ld, 34706bc7103cSJiong Wang struct bpf_insn *prev_st) 34716bc7103cSJiong Wang { 34726bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 34736bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 34746bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 34756bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 34766bc7103cSJiong Wang 34776bc7103cSJiong Wang /* This pair is the start pair. */ 34786bc7103cSJiong Wang if (!prev_ld) 34796bc7103cSJiong Wang return true; 34806bc7103cSJiong Wang 34816bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 34826bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 34836bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 34846bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 34856bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 34866bc7103cSJiong Wang prev_ld_off = prev_ld->off; 34876bc7103cSJiong Wang prev_st_off = prev_st->off; 34886bc7103cSJiong Wang 34896bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 34906bc7103cSJiong Wang return false; 34916bc7103cSJiong Wang 34926bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 34936bc7103cSJiong Wang return false; 34946bc7103cSJiong Wang 34956bc7103cSJiong Wang if (curr_size != prev_size) 34966bc7103cSJiong Wang return false; 34976bc7103cSJiong Wang 34986bc7103cSJiong Wang /* There is jump to the head of this pair. */ 34996bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 35006bc7103cSJiong Wang return false; 35016bc7103cSJiong Wang 35026bc7103cSJiong Wang /* Both in ascending order. */ 35036bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 35046bc7103cSJiong Wang prev_st_off + prev_size == st->off) 35056bc7103cSJiong Wang return true; 35066bc7103cSJiong Wang 35076bc7103cSJiong Wang /* Both in descending order. */ 35086bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 35096bc7103cSJiong Wang st->off + curr_size == prev_st_off) 35106bc7103cSJiong Wang return true; 35116bc7103cSJiong Wang 35126bc7103cSJiong Wang return false; 35136bc7103cSJiong Wang } 35146bc7103cSJiong Wang 35156bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 35166bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 35176bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 35186bc7103cSJiong Wang * as an memory copy. 35196bc7103cSJiong Wang */ 35206bc7103cSJiong Wang static bool 35216bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 35226bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 35236bc7103cSJiong Wang { 35246bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 35256bc7103cSJiong Wang 35266bc7103cSJiong Wang /* Different pointer types does not overlap. */ 35276bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 35286bc7103cSJiong Wang return false; 35296bc7103cSJiong Wang 35306bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 35316bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 35326bc7103cSJiong Wang return true; 35336bc7103cSJiong Wang 35346bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 35356bc7103cSJiong Wang * base register. 35366bc7103cSJiong Wang */ 35376bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 35386bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 35396bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 35406bc7103cSJiong Wang 35416bc7103cSJiong Wang /* Ascending order cross. */ 35426bc7103cSJiong Wang if (ld_off > head_ld_off && 35436bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 35446bc7103cSJiong Wang return true; 35456bc7103cSJiong Wang 35466bc7103cSJiong Wang /* Descending order cross. */ 35476bc7103cSJiong Wang if (ld_off < head_ld_off && 35486bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 35496bc7103cSJiong Wang return true; 35506bc7103cSJiong Wang 35516bc7103cSJiong Wang return false; 35526bc7103cSJiong Wang } 35536bc7103cSJiong Wang 35546bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 35556bc7103cSJiong Wang * 35566bc7103cSJiong Wang * load R, [regA + offA] 35576bc7103cSJiong Wang * store [regB + offB], R 35586bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 35596bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 35606bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 35616bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 35626bc7103cSJiong Wang * ... 35636bc7103cSJiong Wang * 35646bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 35656bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 35666bc7103cSJiong Wang */ 35676bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 35686bc7103cSJiong Wang { 35696bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 35706bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 35716bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 35726bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 35736bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 35746bc7103cSJiong Wang u8 count = 0; 35756bc7103cSJiong Wang 35766bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 35776bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 35786bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 35796bc7103cSJiong Wang 35806bc7103cSJiong Wang /* Reset record status if any of the following if true: 35816bc7103cSJiong Wang * - The current insn pair is not load/store. 35826bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 35836bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 35846bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 35856bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 35866bc7103cSJiong Wang * single NFP CPP command can transfer. 35876bc7103cSJiong Wang */ 35886bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 35896bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 35906bc7103cSJiong Wang prev_st) || 35916bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 35926bc7103cSJiong Wang head_st_meta) || 35936bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 35946bc7103cSJiong Wang if (!count) 35956bc7103cSJiong Wang continue; 35966bc7103cSJiong Wang 35976bc7103cSJiong Wang if (count > 1) { 35986bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 35996bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 36006bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 36016bc7103cSJiong Wang 36026bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 36036bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 36046bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 36056bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 36066bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 36076bc7103cSJiong Wang } 36086bc7103cSJiong Wang 36096bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 36106bc7103cSJiong Wang head_st_meta->skip = true; 36116bc7103cSJiong Wang } else { 36126bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 36136bc7103cSJiong Wang } 36146bc7103cSJiong Wang 36156bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 36166bc7103cSJiong Wang * could serve as the new head of the the next chain. 36176bc7103cSJiong Wang */ 36186bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 36196bc7103cSJiong Wang head_ld_meta = meta1; 36206bc7103cSJiong Wang head_st_meta = meta2; 36216bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 36226bc7103cSJiong Wang BPF_LDST_BYTES(ld); 36236bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 36246bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 36256bc7103cSJiong Wang prev_ld = ld; 36266bc7103cSJiong Wang prev_st = st; 36276bc7103cSJiong Wang count = 1; 36286bc7103cSJiong Wang } else { 36296bc7103cSJiong Wang head_ld_meta = NULL; 36306bc7103cSJiong Wang head_st_meta = NULL; 36316bc7103cSJiong Wang prev_ld = NULL; 36326bc7103cSJiong Wang prev_st = NULL; 36336bc7103cSJiong Wang count = 0; 36346bc7103cSJiong Wang } 36356bc7103cSJiong Wang 36366bc7103cSJiong Wang continue; 36376bc7103cSJiong Wang } 36386bc7103cSJiong Wang 36396bc7103cSJiong Wang if (!head_ld_meta) { 36406bc7103cSJiong Wang head_ld_meta = meta1; 36416bc7103cSJiong Wang head_st_meta = meta2; 36426bc7103cSJiong Wang } else { 36436bc7103cSJiong Wang meta1->skip = true; 36446bc7103cSJiong Wang meta2->skip = true; 36456bc7103cSJiong Wang } 36466bc7103cSJiong Wang 36476bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 36486bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 36496bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 36506bc7103cSJiong Wang prev_ld = ld; 36516bc7103cSJiong Wang prev_st = st; 36526bc7103cSJiong Wang count++; 36536bc7103cSJiong Wang } 36546bc7103cSJiong Wang } 36556bc7103cSJiong Wang 365687b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 365787b10ecdSJiong Wang { 365887b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 365987b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 366087b10ecdSJiong Wang bool cache_avail = false; 366187b10ecdSJiong Wang struct bpf_insn *insn; 366287b10ecdSJiong Wang s32 range_ptr_off = 0; 366387b10ecdSJiong Wang u32 range_ptr_id = 0; 366487b10ecdSJiong Wang 366587b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 366687b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 366787b10ecdSJiong Wang cache_avail = false; 366887b10ecdSJiong Wang 366987b10ecdSJiong Wang if (meta->skip) 367087b10ecdSJiong Wang continue; 367187b10ecdSJiong Wang 367287b10ecdSJiong Wang insn = &meta->insn; 367387b10ecdSJiong Wang 367487b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 367587b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 367687b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 367787b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 367887b10ecdSJiong Wang cache_avail = false; 367987b10ecdSJiong Wang continue; 368087b10ecdSJiong Wang } 368187b10ecdSJiong Wang 368287b10ecdSJiong Wang if (!is_mbpf_load(meta)) 368387b10ecdSJiong Wang continue; 368487b10ecdSJiong Wang 368587b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 368687b10ecdSJiong Wang cache_avail = false; 368787b10ecdSJiong Wang continue; 368887b10ecdSJiong Wang } 368987b10ecdSJiong Wang 369087b10ecdSJiong Wang if (!cache_avail) { 369187b10ecdSJiong Wang cache_avail = true; 369287b10ecdSJiong Wang if (range_node) 369387b10ecdSJiong Wang goto end_current_then_start_new; 369487b10ecdSJiong Wang goto start_new; 369587b10ecdSJiong Wang } 369687b10ecdSJiong Wang 369787b10ecdSJiong Wang /* Check ID to make sure two reads share the same 369887b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 369987b10ecdSJiong Wang * to make sure they also share the same constant 370087b10ecdSJiong Wang * offset. 370187b10ecdSJiong Wang * 370287b10ecdSJiong Wang * OFFs don't really need to be the same, because they 370387b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 370487b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 370587b10ecdSJiong Wang * offsets against original packet pointer. We don't 370687b10ecdSJiong Wang * support this. 370787b10ecdSJiong Wang */ 370887b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 370987b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 371087b10ecdSJiong Wang s16 new_start = range_start; 371187b10ecdSJiong Wang s16 end, off = insn->off; 371287b10ecdSJiong Wang s16 new_end = range_end; 371387b10ecdSJiong Wang bool changed = false; 371487b10ecdSJiong Wang 371587b10ecdSJiong Wang if (off < range_start) { 371687b10ecdSJiong Wang new_start = off; 371787b10ecdSJiong Wang changed = true; 371887b10ecdSJiong Wang } 371987b10ecdSJiong Wang 372087b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 372187b10ecdSJiong Wang if (end > range_end) { 372287b10ecdSJiong Wang new_end = end; 372387b10ecdSJiong Wang changed = true; 372487b10ecdSJiong Wang } 372587b10ecdSJiong Wang 372687b10ecdSJiong Wang if (!changed) 372787b10ecdSJiong Wang continue; 372887b10ecdSJiong Wang 372987b10ecdSJiong Wang if (new_end - new_start <= 64) { 373087b10ecdSJiong Wang /* Install new range. */ 373187b10ecdSJiong Wang range_start = new_start; 373287b10ecdSJiong Wang range_end = new_end; 373387b10ecdSJiong Wang continue; 373487b10ecdSJiong Wang } 373587b10ecdSJiong Wang } 373687b10ecdSJiong Wang 373787b10ecdSJiong Wang end_current_then_start_new: 373887b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 373987b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 374087b10ecdSJiong Wang start_new: 374187b10ecdSJiong Wang range_node = meta; 374287b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 374387b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 374487b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 374587b10ecdSJiong Wang range_start = insn->off; 374687b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 374787b10ecdSJiong Wang } 374887b10ecdSJiong Wang 374987b10ecdSJiong Wang if (range_node) { 375087b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 375187b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 375287b10ecdSJiong Wang } 375387b10ecdSJiong Wang 375487b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 375587b10ecdSJiong Wang if (meta->skip) 375687b10ecdSJiong Wang continue; 375787b10ecdSJiong Wang 375887b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 375987b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 376087b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 376187b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 376287b10ecdSJiong Wang } else { 376387b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 376487b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 376587b10ecdSJiong Wang } 376687b10ecdSJiong Wang } 376787b10ecdSJiong Wang } 376887b10ecdSJiong Wang } 376987b10ecdSJiong Wang 3770d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 3771d9ae7f2bSJakub Kicinski { 3772d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 3773d9ae7f2bSJakub Kicinski 37746c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 3775d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 3776d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 37776bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 377887b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 3779d9ae7f2bSJakub Kicinski 3780d9ae7f2bSJakub Kicinski return 0; 3781d9ae7f2bSJakub Kicinski } 3782d9ae7f2bSJakub Kicinski 3783b4264c96SJakub Kicinski static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) 3784b4264c96SJakub Kicinski { 3785b4264c96SJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3786b4264c96SJakub Kicinski struct nfp_bpf_map *nfp_map; 3787b4264c96SJakub Kicinski struct bpf_map *map; 3788b4264c96SJakub Kicinski 3789b4264c96SJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3790b4264c96SJakub Kicinski if (meta1->skip || meta2->skip) 3791b4264c96SJakub Kicinski continue; 3792b4264c96SJakub Kicinski 3793b4264c96SJakub Kicinski if (meta1->insn.code != (BPF_LD | BPF_IMM | BPF_DW) || 3794b4264c96SJakub Kicinski meta1->insn.src_reg != BPF_PSEUDO_MAP_FD) 3795b4264c96SJakub Kicinski continue; 3796b4264c96SJakub Kicinski 3797b4264c96SJakub Kicinski map = (void *)(unsigned long)((u32)meta1->insn.imm | 3798b4264c96SJakub Kicinski (u64)meta2->insn.imm << 32); 3799b4264c96SJakub Kicinski if (bpf_map_offload_neutral(map)) 3800b4264c96SJakub Kicinski continue; 3801b4264c96SJakub Kicinski nfp_map = map_to_offmap(map)->dev_priv; 3802b4264c96SJakub Kicinski 3803b4264c96SJakub Kicinski meta1->insn.imm = nfp_map->tid; 3804b4264c96SJakub Kicinski meta2->insn.imm = 0; 3805b4264c96SJakub Kicinski } 3806b4264c96SJakub Kicinski 3807b4264c96SJakub Kicinski return 0; 3808b4264c96SJakub Kicinski } 3809b4264c96SJakub Kicinski 38102314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 3811fd068ddcSJakub Kicinski { 38122314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 3813fd068ddcSJakub Kicinski int i; 3814fd068ddcSJakub Kicinski 38152314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 3816fd068ddcSJakub Kicinski int err; 3817fd068ddcSJakub Kicinski 38182314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 3819fd068ddcSJakub Kicinski if (err) 3820fd068ddcSJakub Kicinski return err; 3821fd068ddcSJakub Kicinski 38222314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 3823fd068ddcSJakub Kicinski } 3824fd068ddcSJakub Kicinski 3825fd068ddcSJakub Kicinski return 0; 3826fd068ddcSJakub Kicinski } 3827fd068ddcSJakub Kicinski 382844a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 382944a12eccSJakub Kicinski { 383044a12eccSJakub Kicinski void *prog; 383144a12eccSJakub Kicinski 383244a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 383344a12eccSJakub Kicinski if (!prog) 383444a12eccSJakub Kicinski return; 383544a12eccSJakub Kicinski 383644a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 383744a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 383844a12eccSJakub Kicinski kvfree(nfp_prog->prog); 383944a12eccSJakub Kicinski nfp_prog->prog = prog; 384044a12eccSJakub Kicinski } 384144a12eccSJakub Kicinski 3842c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3843d9ae7f2bSJakub Kicinski { 3844d9ae7f2bSJakub Kicinski int ret; 3845d9ae7f2bSJakub Kicinski 3846b4264c96SJakub Kicinski ret = nfp_bpf_replace_map_ptrs(nfp_prog); 3847b4264c96SJakub Kicinski if (ret) 3848b4264c96SJakub Kicinski return ret; 3849b4264c96SJakub Kicinski 3850d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 3851d9ae7f2bSJakub Kicinski if (ret) 38529314c442SJakub Kicinski return ret; 3853d9ae7f2bSJakub Kicinski 3854d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 3855d9ae7f2bSJakub Kicinski if (ret) { 3856d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 3857d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 38589314c442SJakub Kicinski return -EINVAL; 3859d9ae7f2bSJakub Kicinski } 3860d9ae7f2bSJakub Kicinski 386144a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 386244a12eccSJakub Kicinski 38632314fe9eSJakub Kicinski return ret; 3864d9ae7f2bSJakub Kicinski } 38651549921dSJakub Kicinski 38661549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 38671549921dSJakub Kicinski { 38681549921dSJakub Kicinski struct nfp_insn_meta *meta; 38691549921dSJakub Kicinski 38701549921dSJakub Kicinski /* Another pass to record jump information. */ 38711549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 38721549921dSJakub Kicinski u64 code = meta->insn.code; 38731549921dSJakub Kicinski 38741549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 38751549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 38761549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 38771549921dSJakub Kicinski unsigned short dst_indx; 38781549921dSJakub Kicinski 38791549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 38801549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 38811549921dSJakub Kicinski cnt); 38821549921dSJakub Kicinski 38831549921dSJakub Kicinski meta->jmp_dst = dst_meta; 38841549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 38851549921dSJakub Kicinski } 38861549921dSJakub Kicinski } 38871549921dSJakub Kicinski } 38882314fe9eSJakub Kicinski 388974801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 389074801e50SQuentin Monnet { 389174801e50SQuentin Monnet return !!instr_cb[code]; 389274801e50SQuentin Monnet } 389374801e50SQuentin Monnet 38942314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 38952314fe9eSJakub Kicinski { 38962314fe9eSJakub Kicinski unsigned int i; 38972314fe9eSJakub Kicinski u64 *prog; 38982314fe9eSJakub Kicinski int err; 38992314fe9eSJakub Kicinski 39002314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 39012314fe9eSJakub Kicinski GFP_KERNEL); 39022314fe9eSJakub Kicinski if (!prog) 39032314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 39042314fe9eSJakub Kicinski 39052314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 39062314fe9eSJakub Kicinski enum nfp_relo_type special; 390777a3d311SJakub Kicinski u32 val; 39082314fe9eSJakub Kicinski 39092314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 39102314fe9eSJakub Kicinski switch (special) { 39112314fe9eSJakub Kicinski case RELO_NONE: 39122314fe9eSJakub Kicinski continue; 39132314fe9eSJakub Kicinski case RELO_BR_REL: 39142314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 39152314fe9eSJakub Kicinski break; 39162314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 39172314fe9eSJakub Kicinski br_set_offset(&prog[i], 39182314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 39192314fe9eSJakub Kicinski break; 39202314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 39212314fe9eSJakub Kicinski br_set_offset(&prog[i], 39222314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 39232314fe9eSJakub Kicinski break; 39242314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 39252314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 39262314fe9eSJakub Kicinski break; 392777a3d311SJakub Kicinski case RELO_BR_HELPER: 392877a3d311SJakub Kicinski val = br_get_offset(prog[i]); 392977a3d311SJakub Kicinski val -= BR_OFF_RELO; 393077a3d311SJakub Kicinski switch (val) { 393177a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 393277a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 393377a3d311SJakub Kicinski break; 393444d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 393544d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 393644d65a47SJakub Kicinski break; 3937bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3938bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 3939bfee64deSJakub Kicinski break; 39409816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 39419816dd35SJakub Kicinski val = nfp_prog->bpf->helpers.perf_event_output; 39429816dd35SJakub Kicinski break; 394377a3d311SJakub Kicinski default: 394477a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 394577a3d311SJakub Kicinski val); 394677a3d311SJakub Kicinski err = -EINVAL; 394777a3d311SJakub Kicinski goto err_free_prog; 394877a3d311SJakub Kicinski } 394977a3d311SJakub Kicinski br_set_offset(&prog[i], val); 395077a3d311SJakub Kicinski break; 395177a3d311SJakub Kicinski case RELO_IMMED_REL: 395277a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 395377a3d311SJakub Kicinski break; 39542314fe9eSJakub Kicinski } 39552314fe9eSJakub Kicinski 39562314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 39572314fe9eSJakub Kicinski } 39582314fe9eSJakub Kicinski 39592314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 39602314fe9eSJakub Kicinski if (err) 39612314fe9eSJakub Kicinski goto err_free_prog; 39622314fe9eSJakub Kicinski 39632314fe9eSJakub Kicinski return prog; 39642314fe9eSJakub Kicinski 39652314fe9eSJakub Kicinski err_free_prog: 39662314fe9eSJakub Kicinski kfree(prog); 39672314fe9eSJakub Kicinski return ERR_PTR(err); 39682314fe9eSJakub Kicinski } 3969