1d9ae7f2bSJakub Kicinski /* 29816dd35SJakub Kicinski * Copyright (C) 2016-2018 Netronome Systems, Inc. 3d9ae7f2bSJakub Kicinski * 4d9ae7f2bSJakub Kicinski * This software is dual licensed under the GNU General License Version 2, 5d9ae7f2bSJakub Kicinski * June 1991 as shown in the file COPYING in the top-level directory of this 6d9ae7f2bSJakub Kicinski * source tree or the BSD 2-Clause License provided below. You have the 7d9ae7f2bSJakub Kicinski * option to license this software under the complete terms of either license. 8d9ae7f2bSJakub Kicinski * 9d9ae7f2bSJakub Kicinski * The BSD 2-Clause License: 10d9ae7f2bSJakub Kicinski * 11d9ae7f2bSJakub Kicinski * Redistribution and use in source and binary forms, with or 12d9ae7f2bSJakub Kicinski * without modification, are permitted provided that the following 13d9ae7f2bSJakub Kicinski * conditions are met: 14d9ae7f2bSJakub Kicinski * 15d9ae7f2bSJakub Kicinski * 1. Redistributions of source code must retain the above 16d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 17d9ae7f2bSJakub Kicinski * disclaimer. 18d9ae7f2bSJakub Kicinski * 19d9ae7f2bSJakub Kicinski * 2. Redistributions in binary form must reproduce the above 20d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 21d9ae7f2bSJakub Kicinski * disclaimer in the documentation and/or other materials 22d9ae7f2bSJakub Kicinski * provided with the distribution. 23d9ae7f2bSJakub Kicinski * 24d9ae7f2bSJakub Kicinski * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25d9ae7f2bSJakub Kicinski * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26d9ae7f2bSJakub Kicinski * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27d9ae7f2bSJakub Kicinski * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28d9ae7f2bSJakub Kicinski * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29d9ae7f2bSJakub Kicinski * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30d9ae7f2bSJakub Kicinski * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31d9ae7f2bSJakub Kicinski * SOFTWARE. 32d9ae7f2bSJakub Kicinski */ 33d9ae7f2bSJakub Kicinski 34d9ae7f2bSJakub Kicinski #define pr_fmt(fmt) "NFP net bpf: " fmt 35d9ae7f2bSJakub Kicinski 360d49eaf4SJakub Kicinski #include <linux/bug.h> 37d9ae7f2bSJakub Kicinski #include <linux/kernel.h> 38d9ae7f2bSJakub Kicinski #include <linux/bpf.h> 39d9ae7f2bSJakub Kicinski #include <linux/filter.h> 40d9ae7f2bSJakub Kicinski #include <linux/pkt_cls.h> 41d9ae7f2bSJakub Kicinski #include <linux/unistd.h> 42d9ae7f2bSJakub Kicinski 43d9ae7f2bSJakub Kicinski #include "main.h" 44d9ae7f2bSJakub Kicinski #include "../nfp_asm.h" 45d985888fSJakub Kicinski #include "../nfp_net_ctrl.h" 46d9ae7f2bSJakub Kicinski 47d9ae7f2bSJakub Kicinski /* --- NFP prog --- */ 48d9ae7f2bSJakub Kicinski /* Foreach "multiple" entries macros provide pos and next<n> pointers. 49d9ae7f2bSJakub Kicinski * It's safe to modify the next pointers (but not pos). 50d9ae7f2bSJakub Kicinski */ 51d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk2(nfp_prog, pos, next) \ 52d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 53d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l); \ 54d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 55d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l; \ 56d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 57d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos)) 58d9ae7f2bSJakub Kicinski 59d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk3(nfp_prog, pos, next, next2) \ 60d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 61d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l), \ 62d9ae7f2bSJakub Kicinski next2 = list_next_entry(next, l); \ 63d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 64d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l && \ 65d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next2->l; \ 66d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 67d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos), \ 68d9ae7f2bSJakub Kicinski next2 = nfp_meta_next(next)) 69d9ae7f2bSJakub Kicinski 70d9ae7f2bSJakub Kicinski static bool 71d9ae7f2bSJakub Kicinski nfp_meta_has_prev(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 72d9ae7f2bSJakub Kicinski { 73d9ae7f2bSJakub Kicinski return meta->l.prev != &nfp_prog->insns; 74d9ae7f2bSJakub Kicinski } 75d9ae7f2bSJakub Kicinski 76d9ae7f2bSJakub Kicinski static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn) 77d9ae7f2bSJakub Kicinski { 78e8a4796eSJakub Kicinski if (nfp_prog->__prog_alloc_len / sizeof(u64) == nfp_prog->prog_len) { 79e8a4796eSJakub Kicinski pr_warn("instruction limit reached (%u NFP instructions)\n", 80e8a4796eSJakub Kicinski nfp_prog->prog_len); 81d9ae7f2bSJakub Kicinski nfp_prog->error = -ENOSPC; 82d9ae7f2bSJakub Kicinski return; 83d9ae7f2bSJakub Kicinski } 84d9ae7f2bSJakub Kicinski 85d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len] = insn; 86d9ae7f2bSJakub Kicinski nfp_prog->prog_len++; 87d9ae7f2bSJakub Kicinski } 88d9ae7f2bSJakub Kicinski 89d9ae7f2bSJakub Kicinski static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) 90d9ae7f2bSJakub Kicinski { 912314fe9eSJakub Kicinski return nfp_prog->prog_len; 92d9ae7f2bSJakub Kicinski } 93d9ae7f2bSJakub Kicinski 940d49eaf4SJakub Kicinski static bool 950d49eaf4SJakub Kicinski nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off) 960d49eaf4SJakub Kicinski { 970d49eaf4SJakub Kicinski /* If there is a recorded error we may have dropped instructions; 980d49eaf4SJakub Kicinski * that doesn't have to be due to translator bug, and the translation 990d49eaf4SJakub Kicinski * will fail anyway, so just return OK. 1000d49eaf4SJakub Kicinski */ 1010d49eaf4SJakub Kicinski if (nfp_prog->error) 1020d49eaf4SJakub Kicinski return true; 1030d49eaf4SJakub Kicinski return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off); 1040d49eaf4SJakub Kicinski } 1050d49eaf4SJakub Kicinski 106d9ae7f2bSJakub Kicinski /* --- Emitters --- */ 107d9ae7f2bSJakub Kicinski static void 108d9ae7f2bSJakub Kicinski __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 109b556ddd9SJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, enum cmd_ctx_swap ctx, 110b556ddd9SJakub Kicinski bool indir) 111d9ae7f2bSJakub Kicinski { 112d9ae7f2bSJakub Kicinski u64 insn; 113d9ae7f2bSJakub Kicinski 114d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 115d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 116d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 117d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 118d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 119d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 120b556ddd9SJakub Kicinski FIELD_PREP(OP_CMD_SIG, ctx != CMD_CTX_NO_SWAP) | 121d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 1225468a8b9SJakub Kicinski FIELD_PREP(OP_CMD_INDIR, indir) | 123d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 124d9ae7f2bSJakub Kicinski 125d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 126d9ae7f2bSJakub Kicinski } 127d9ae7f2bSJakub Kicinski 128d9ae7f2bSJakub Kicinski static void 1295468a8b9SJakub Kicinski emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 130b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx, bool indir) 131d9ae7f2bSJakub Kicinski { 132d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 133d9ae7f2bSJakub Kicinski int err; 134d9ae7f2bSJakub Kicinski 135d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 136d9ae7f2bSJakub Kicinski if (err) { 137d9ae7f2bSJakub Kicinski nfp_prog->error = err; 138d9ae7f2bSJakub Kicinski return; 139d9ae7f2bSJakub Kicinski } 140d9ae7f2bSJakub Kicinski if (reg.swap) { 141d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 142d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 143d9ae7f2bSJakub Kicinski return; 144d9ae7f2bSJakub Kicinski } 145995e101fSJakub Kicinski if (reg.dst_lmextn || reg.src_lmextn) { 146995e101fSJakub Kicinski pr_err("cmd can't use LMextn\n"); 147995e101fSJakub Kicinski nfp_prog->error = -EFAULT; 148995e101fSJakub Kicinski return; 149995e101fSJakub Kicinski } 150d9ae7f2bSJakub Kicinski 151b556ddd9SJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, ctx, 1525468a8b9SJakub Kicinski indir); 1535468a8b9SJakub Kicinski } 1545468a8b9SJakub Kicinski 1555468a8b9SJakub Kicinski static void 1565468a8b9SJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 157b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1585468a8b9SJakub Kicinski { 159b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, false); 160d9ae7f2bSJakub Kicinski } 161d9ae7f2bSJakub Kicinski 162d9ae7f2bSJakub Kicinski static void 1639879a381SJiong Wang emit_cmd_indir(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 164b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1659879a381SJiong Wang { 166b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, true); 1679879a381SJiong Wang } 1689879a381SJiong Wang 1699879a381SJiong Wang static void 170d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 171d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 172d9ae7f2bSJakub Kicinski { 173d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 174d9ae7f2bSJakub Kicinski u64 insn; 175d9ae7f2bSJakub Kicinski 176d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 177d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 178d9ae7f2bSJakub Kicinski 179d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 180d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 181d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 182d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 183d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 184d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 185d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 186d9ae7f2bSJakub Kicinski 187d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 188d9ae7f2bSJakub Kicinski } 189d9ae7f2bSJakub Kicinski 1902314fe9eSJakub Kicinski static void 1912314fe9eSJakub Kicinski emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, 1922314fe9eSJakub Kicinski enum nfp_relo_type relo) 193d9ae7f2bSJakub Kicinski { 1942314fe9eSJakub Kicinski if (mask == BR_UNC && defer > 2) { 195d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 196d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 197d9ae7f2bSJakub Kicinski return; 198d9ae7f2bSJakub Kicinski } 1992314fe9eSJakub Kicinski 2002314fe9eSJakub Kicinski __emit_br(nfp_prog, mask, 2012314fe9eSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 2022314fe9eSJakub Kicinski BR_CSS_NONE, addr, defer); 2032314fe9eSJakub Kicinski 2042314fe9eSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 2052314fe9eSJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 206d9ae7f2bSJakub Kicinski } 207d9ae7f2bSJakub Kicinski 208d9ae7f2bSJakub Kicinski static void 209d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 210d9ae7f2bSJakub Kicinski { 2112314fe9eSJakub Kicinski emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); 212d9ae7f2bSJakub Kicinski } 213d9ae7f2bSJakub Kicinski 214d9ae7f2bSJakub Kicinski static void 215991f5b36SJiong Wang __emit_br_bit(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 addr, u8 defer, 216991f5b36SJiong Wang bool set, bool src_lmextn) 217991f5b36SJiong Wang { 218991f5b36SJiong Wang u16 addr_lo, addr_hi; 219991f5b36SJiong Wang u64 insn; 220991f5b36SJiong Wang 221991f5b36SJiong Wang addr_lo = addr & (OP_BR_BIT_ADDR_LO >> __bf_shf(OP_BR_BIT_ADDR_LO)); 222991f5b36SJiong Wang addr_hi = addr != addr_lo; 223991f5b36SJiong Wang 224991f5b36SJiong Wang insn = OP_BR_BIT_BASE | 225991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_A_SRC, areg) | 226991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_B_SRC, breg) | 227991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_BV, set) | 228991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_DEFBR, defer) | 229991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_ADDR_LO, addr_lo) | 230991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_ADDR_HI, addr_hi) | 231991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_SRC_LMEXTN, src_lmextn); 232991f5b36SJiong Wang 233991f5b36SJiong Wang nfp_prog_push(nfp_prog, insn); 234991f5b36SJiong Wang } 235991f5b36SJiong Wang 236991f5b36SJiong Wang static void 237991f5b36SJiong Wang emit_br_bit_relo(struct nfp_prog *nfp_prog, swreg src, u8 bit, u16 addr, 238991f5b36SJiong Wang u8 defer, bool set, enum nfp_relo_type relo) 239991f5b36SJiong Wang { 240991f5b36SJiong Wang struct nfp_insn_re_regs reg; 241991f5b36SJiong Wang int err; 242991f5b36SJiong Wang 243991f5b36SJiong Wang /* NOTE: The bit to test is specified as an rotation amount, such that 244991f5b36SJiong Wang * the bit to test will be placed on the MSB of the result when 245991f5b36SJiong Wang * doing a rotate right. For bit X, we need right rotate X + 1. 246991f5b36SJiong Wang */ 247991f5b36SJiong Wang bit += 1; 248991f5b36SJiong Wang 249991f5b36SJiong Wang err = swreg_to_restricted(reg_none(), src, reg_imm(bit), ®, false); 250991f5b36SJiong Wang if (err) { 251991f5b36SJiong Wang nfp_prog->error = err; 252991f5b36SJiong Wang return; 253991f5b36SJiong Wang } 254991f5b36SJiong Wang 255991f5b36SJiong Wang __emit_br_bit(nfp_prog, reg.areg, reg.breg, addr, defer, set, 256991f5b36SJiong Wang reg.src_lmextn); 257991f5b36SJiong Wang 258991f5b36SJiong Wang nfp_prog->prog[nfp_prog->prog_len - 1] |= 259991f5b36SJiong Wang FIELD_PREP(OP_RELO_TYPE, relo); 260991f5b36SJiong Wang } 261991f5b36SJiong Wang 262991f5b36SJiong Wang static void 263991f5b36SJiong Wang emit_br_bset(struct nfp_prog *nfp_prog, swreg src, u8 bit, u16 addr, u8 defer) 264991f5b36SJiong Wang { 265991f5b36SJiong Wang emit_br_bit_relo(nfp_prog, src, bit, addr, defer, true, RELO_BR_REL); 266991f5b36SJiong Wang } 267991f5b36SJiong Wang 268991f5b36SJiong Wang static void 269d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 270d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 271995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 272995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 273d9ae7f2bSJakub Kicinski { 274d9ae7f2bSJakub Kicinski u64 insn; 275d9ae7f2bSJakub Kicinski 276d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 277d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 278d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 279d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 280d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 281d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 283995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 284995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 285995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 286d9ae7f2bSJakub Kicinski 287d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 288d9ae7f2bSJakub Kicinski } 289d9ae7f2bSJakub Kicinski 290d9ae7f2bSJakub Kicinski static void 291b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 292d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 293d9ae7f2bSJakub Kicinski { 294d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 295d9ae7f2bSJakub Kicinski int err; 296d9ae7f2bSJakub Kicinski 297b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 298d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 299d9ae7f2bSJakub Kicinski return; 300d9ae7f2bSJakub Kicinski } 301d9ae7f2bSJakub Kicinski 302d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 303d9ae7f2bSJakub Kicinski if (err) { 304d9ae7f2bSJakub Kicinski nfp_prog->error = err; 305d9ae7f2bSJakub Kicinski return; 306d9ae7f2bSJakub Kicinski } 307d9ae7f2bSJakub Kicinski 3083239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 3093239e7bbSJiong Wang __emit_immed(nfp_prog, 3103239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 3113239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 3123239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 313d9ae7f2bSJakub Kicinski } 314d9ae7f2bSJakub Kicinski 315d9ae7f2bSJakub Kicinski static void 316d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 317d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 318995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 319995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 320d9ae7f2bSJakub Kicinski { 321d9ae7f2bSJakub Kicinski u64 insn; 322d9ae7f2bSJakub Kicinski 323d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 324d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 325d9ae7f2bSJakub Kicinski return; 326d9ae7f2bSJakub Kicinski } 327d9ae7f2bSJakub Kicinski 328d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 329d9ae7f2bSJakub Kicinski shift = 32 - shift; 330d9ae7f2bSJakub Kicinski 331d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 332d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 333d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 334d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 335d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 336d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 337d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 338d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 339d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 340d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 341995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 342995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 343995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 344d9ae7f2bSJakub Kicinski 345d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 346d9ae7f2bSJakub Kicinski } 347d9ae7f2bSJakub Kicinski 348d9ae7f2bSJakub Kicinski static void 349b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 350b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 351d9ae7f2bSJakub Kicinski { 352d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 353d9ae7f2bSJakub Kicinski int err; 354d9ae7f2bSJakub Kicinski 355d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 356d9ae7f2bSJakub Kicinski if (err) { 357d9ae7f2bSJakub Kicinski nfp_prog->error = err; 358d9ae7f2bSJakub Kicinski return; 359d9ae7f2bSJakub Kicinski } 360d9ae7f2bSJakub Kicinski 361d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 362995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 363995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 364d9ae7f2bSJakub Kicinski } 365d9ae7f2bSJakub Kicinski 366d9ae7f2bSJakub Kicinski static void 367991f5b36SJiong Wang emit_shf_indir(struct nfp_prog *nfp_prog, swreg dst, 368991f5b36SJiong Wang swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc) 369991f5b36SJiong Wang { 370991f5b36SJiong Wang if (sc == SHF_SC_R_ROT) { 371991f5b36SJiong Wang pr_err("indirect shift is not allowed on rotation\n"); 372991f5b36SJiong Wang nfp_prog->error = -EFAULT; 373991f5b36SJiong Wang return; 374991f5b36SJiong Wang } 375991f5b36SJiong Wang 376991f5b36SJiong Wang emit_shf(nfp_prog, dst, lreg, op, rreg, sc, 0); 377991f5b36SJiong Wang } 378991f5b36SJiong Wang 379991f5b36SJiong Wang static void 380d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 381995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 382995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 383d9ae7f2bSJakub Kicinski { 384d9ae7f2bSJakub Kicinski u64 insn; 385d9ae7f2bSJakub Kicinski 386d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 387d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 388d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 389d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 390d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 391d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 392d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 393995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 394995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 395995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 396d9ae7f2bSJakub Kicinski 397d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 398d9ae7f2bSJakub Kicinski } 399d9ae7f2bSJakub Kicinski 400d9ae7f2bSJakub Kicinski static void 401b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 402b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 403d9ae7f2bSJakub Kicinski { 404d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 405d9ae7f2bSJakub Kicinski int err; 406d9ae7f2bSJakub Kicinski 407d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 408d9ae7f2bSJakub Kicinski if (err) { 409d9ae7f2bSJakub Kicinski nfp_prog->error = err; 410d9ae7f2bSJakub Kicinski return; 411d9ae7f2bSJakub Kicinski } 412d9ae7f2bSJakub Kicinski 413d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 414995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 415995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 416d9ae7f2bSJakub Kicinski } 417d9ae7f2bSJakub Kicinski 418d9ae7f2bSJakub Kicinski static void 419d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 420d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 421995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 422995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 423d9ae7f2bSJakub Kicinski { 424d9ae7f2bSJakub Kicinski u64 insn; 425d9ae7f2bSJakub Kicinski 426d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 427d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 428d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 429d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 430d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 431d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 432d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 433d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 434d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 435995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 436995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 437995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 438d9ae7f2bSJakub Kicinski 439d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 440d9ae7f2bSJakub Kicinski } 441d9ae7f2bSJakub Kicinski 442d9ae7f2bSJakub Kicinski static void 443bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 444bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 445d9ae7f2bSJakub Kicinski { 446d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 447d9ae7f2bSJakub Kicinski int err; 448d9ae7f2bSJakub Kicinski 4492de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 4502de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 451d9ae7f2bSJakub Kicinski if (err) { 452d9ae7f2bSJakub Kicinski nfp_prog->error = err; 453d9ae7f2bSJakub Kicinski return; 454d9ae7f2bSJakub Kicinski } 455d9ae7f2bSJakub Kicinski 456d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 457995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 458995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 459d9ae7f2bSJakub Kicinski } 460d9ae7f2bSJakub Kicinski 461d9ae7f2bSJakub Kicinski static void 462b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 463d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 464d9ae7f2bSJakub Kicinski { 465bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 466d9ae7f2bSJakub Kicinski } 467d9ae7f2bSJakub Kicinski 4682df03a50SJakub Kicinski static void 4692df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 4702df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 4712df03a50SJakub Kicinski { 4722df03a50SJakub Kicinski u64 insn; 4732df03a50SJakub Kicinski 4742df03a50SJakub Kicinski insn = OP_LCSR_BASE | 4752df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 4762df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 4772df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 478df4a37d8SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr / 4) | 4792df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 4802df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 4812df03a50SJakub Kicinski 4822df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 4832df03a50SJakub Kicinski } 4842df03a50SJakub Kicinski 4852df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 4862df03a50SJakub Kicinski { 4872df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 4882df03a50SJakub Kicinski int err; 4892df03a50SJakub Kicinski 4902df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 4912df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 4922df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 4932df03a50SJakub Kicinski * copy the immed to both operands. 4942df03a50SJakub Kicinski */ 4952df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 4962df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 4972df03a50SJakub Kicinski reg.breg = reg.areg; 4982df03a50SJakub Kicinski } else { 4992df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 5002df03a50SJakub Kicinski } 5012df03a50SJakub Kicinski if (err) { 5022df03a50SJakub Kicinski nfp_prog->error = err; 5032df03a50SJakub Kicinski return; 5042df03a50SJakub Kicinski } 5052df03a50SJakub Kicinski 506df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr, 5072df03a50SJakub Kicinski false, reg.src_lmextn); 5082df03a50SJakub Kicinski } 5092df03a50SJakub Kicinski 510df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 511df4a37d8SJakub Kicinski static void __emit_csr_rd(struct nfp_prog *nfp_prog, u16 addr) 512df4a37d8SJakub Kicinski { 513df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, 0, 0, false, addr, false, false); 514df4a37d8SJakub Kicinski } 515df4a37d8SJakub Kicinski 5161c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 5171c03e03fSJakub Kicinski { 5181c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 5191c03e03fSJakub Kicinski } 5201c03e03fSJakub Kicinski 521d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 522d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 523d9ae7f2bSJakub Kicinski { 524d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 525d9ae7f2bSJakub Kicinski *val = imm; 526d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 527d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 528d9ae7f2bSJakub Kicinski *val = imm >> 8; 529d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 530d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 531d9ae7f2bSJakub Kicinski *val = imm >> 16; 532d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 533d9ae7f2bSJakub Kicinski } else { 534d9ae7f2bSJakub Kicinski return false; 535d9ae7f2bSJakub Kicinski } 536d9ae7f2bSJakub Kicinski 537d9ae7f2bSJakub Kicinski return true; 538d9ae7f2bSJakub Kicinski } 539d9ae7f2bSJakub Kicinski 540b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 541d9ae7f2bSJakub Kicinski { 542d9ae7f2bSJakub Kicinski enum immed_shift shift; 543d9ae7f2bSJakub Kicinski u16 val; 544d9ae7f2bSJakub Kicinski 545d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 546d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 547d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 548d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 549d9ae7f2bSJakub Kicinski } else { 550d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 551d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 552d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 553d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 554d9ae7f2bSJakub Kicinski } 555d9ae7f2bSJakub Kicinski } 556d9ae7f2bSJakub Kicinski 55777a3d311SJakub Kicinski static void 55877a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 55977a3d311SJakub Kicinski enum nfp_relo_type relo) 56077a3d311SJakub Kicinski { 56177a3d311SJakub Kicinski if (imm > 0xffff) { 56277a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 56377a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 56477a3d311SJakub Kicinski return; 56577a3d311SJakub Kicinski } 56677a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 56777a3d311SJakub Kicinski 56877a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 56977a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 57077a3d311SJakub Kicinski } 57177a3d311SJakub Kicinski 572d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 573d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 574d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 575d9ae7f2bSJakub Kicinski */ 576b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 577d9ae7f2bSJakub Kicinski { 578d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 579d9ae7f2bSJakub Kicinski return reg_imm(imm); 580d9ae7f2bSJakub Kicinski 581d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 582d9ae7f2bSJakub Kicinski return tmp_reg; 583d9ae7f2bSJakub Kicinski } 584d9ae7f2bSJakub Kicinski 585d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 586d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 587d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 588d9ae7f2bSJakub Kicinski */ 589b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 590d9ae7f2bSJakub Kicinski { 591d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 592d9ae7f2bSJakub Kicinski return reg_imm(imm); 593d9ae7f2bSJakub Kicinski 594d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 595d9ae7f2bSJakub Kicinski return tmp_reg; 596d9ae7f2bSJakub Kicinski } 597d9ae7f2bSJakub Kicinski 598ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 599ff42bb9fSJakub Kicinski { 600ff42bb9fSJakub Kicinski while (count--) 601ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 602ff42bb9fSJakub Kicinski } 603ff42bb9fSJakub Kicinski 604c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 605c000dfb5SJakub Kicinski { 606c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 607c000dfb5SJakub Kicinski } 608c000dfb5SJakub Kicinski 609d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 610d9ae7f2bSJakub Kicinski { 611c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 612d9ae7f2bSJakub Kicinski } 613d9ae7f2bSJakub Kicinski 6149879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 6159879a381SJiong Wang * result to @dst from low end. 6169879a381SJiong Wang */ 6179879a381SJiong Wang static void 6189879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 6199879a381SJiong Wang u8 offset) 6209879a381SJiong Wang { 6219879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 6229879a381SJiong Wang u8 mask = (1 << field_len) - 1; 6239879a381SJiong Wang 6249879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 6259879a381SJiong Wang } 6269879a381SJiong Wang 62791ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 62891ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 62991ff69e8SJiong Wang */ 63091ff69e8SJiong Wang static void 63191ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 63291ff69e8SJiong Wang u8 field_len, u8 offset) 63391ff69e8SJiong Wang { 63491ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 63591ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 63691ff69e8SJiong Wang 63791ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 63891ff69e8SJiong Wang } 63991ff69e8SJiong Wang 6403dd43c33SJakub Kicinski static void 6413dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 6423dd43c33SJakub Kicinski swreg *rega, swreg *regb) 6433dd43c33SJakub Kicinski { 6443dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 6453dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 6463dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 6473dd43c33SJakub Kicinski return; 6483dd43c33SJakub Kicinski } 6493dd43c33SJakub Kicinski 6503dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 6513dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 6523dd43c33SJakub Kicinski reg_imm(0)); 6533dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 6543dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 6553dd43c33SJakub Kicinski } 6563dd43c33SJakub Kicinski 6579879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 6589879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 6599879a381SJiong Wang { 6609879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 6619879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 6629879a381SJiong Wang swreg src_base, off; 6633dd43c33SJakub Kicinski bool src_40bit_addr; 6649879a381SJiong Wang unsigned int i; 6659879a381SJiong Wang u8 xfer_num; 6669879a381SJiong Wang 6679879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 6683dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 6699879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 6709879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 6719879a381SJiong Wang 6723dd43c33SJakub Kicinski if (src_40bit_addr) 6733dd43c33SJakub Kicinski addr40_offset(nfp_prog, meta->insn.src_reg, off, &src_base, 6743dd43c33SJakub Kicinski &off); 6753dd43c33SJakub Kicinski 6768c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 6778c900538SJiong Wang if (len > 32) 6788c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 6798c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 6808c900538SJiong Wang 6819879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 6823dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 6833dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 684b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 6859879a381SJiong Wang 6869879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 6879879a381SJiong Wang for (i = 0; i < xfer_num; i++) 6889879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 6899879a381SJiong Wang 6909879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 6919879a381SJiong Wang 6929879a381SJiong Wang if (len <= 8) { 6939879a381SJiong Wang /* Use single direct_ref write8. */ 6949879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 6959879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 696b556ddd9SJakub Kicinski CMD_CTX_SWAP); 6978c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 6989879a381SJiong Wang /* Use single direct_ref write32. */ 6999879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7009879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 701b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7028c900538SJiong Wang } else if (len <= 32) { 7039879a381SJiong Wang /* Use single indirect_ref write8. */ 7049879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 7059879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 7069879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7079879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 708b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 7098c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 7108c900538SJiong Wang /* Use single indirect_ref write32. */ 7118c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7128c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7138c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7148c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 715b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 7168c900538SJiong Wang } else if (len <= 40) { 7178c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 7188c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 7198c900538SJiong Wang */ 7208c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7218c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 722b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7238c900538SJiong Wang 7248c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 7258c900538SJiong Wang imm_b(nfp_prog)); 7268c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 7278c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 728b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7298c900538SJiong Wang } else { 7308c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 7318c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 7328c900538SJiong Wang */ 7338c900538SJiong Wang u8 new_off; 7348c900538SJiong Wang 7358c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7368c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 7378c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7388c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 739b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 7408c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 7418c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 7428c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 7438c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 744b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 7459879a381SJiong Wang } 7469879a381SJiong Wang 7479879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 7489879a381SJiong Wang * before and after we do memory copy optimization. 7499879a381SJiong Wang * 7509879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 7519879a381SJiong Wang * need to make sure it is loaded with the value the same as before 7529879a381SJiong Wang * this transformation. 7539879a381SJiong Wang * 7549879a381SJiong Wang * These extra loads could be removed once we have accurate register 7559879a381SJiong Wang * usage information. 7569879a381SJiong Wang */ 7579879a381SJiong Wang if (descending_seq) 7589879a381SJiong Wang xfer_num = 0; 7599879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 7609879a381SJiong Wang xfer_num = xfer_num - 1; 7619879a381SJiong Wang else 7629879a381SJiong Wang xfer_num = xfer_num - 2; 7639879a381SJiong Wang 7649879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 7659879a381SJiong Wang case BPF_B: 7669879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7679879a381SJiong Wang reg_xfer(xfer_num), 1, 7689879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 7699879a381SJiong Wang break; 7709879a381SJiong Wang case BPF_H: 7719879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7729879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 7739879a381SJiong Wang break; 7749879a381SJiong Wang case BPF_W: 7759879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7769879a381SJiong Wang reg_xfer(0)); 7779879a381SJiong Wang break; 7789879a381SJiong Wang case BPF_DW: 7799879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 7809879a381SJiong Wang reg_xfer(xfer_num)); 7819879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 7829879a381SJiong Wang reg_xfer(xfer_num + 1)); 7839879a381SJiong Wang break; 7849879a381SJiong Wang } 7859879a381SJiong Wang 7869879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 7879879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 7889879a381SJiong Wang 7899879a381SJiong Wang return 0; 7909879a381SJiong Wang } 7919879a381SJiong Wang 792d9ae7f2bSJakub Kicinski static int 7930a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 794d9ae7f2bSJakub Kicinski { 795d9ae7f2bSJakub Kicinski unsigned int i; 796d9ae7f2bSJakub Kicinski u16 shift, sz; 797d9ae7f2bSJakub Kicinski 798d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 799d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 800d9ae7f2bSJakub Kicinski */ 8010a793977SJakub Kicinski sz = max(size, 4); 802d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 803d9ae7f2bSJakub Kicinski 8040a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 805b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 8060a793977SJakub Kicinski 8070a793977SJakub Kicinski i = 0; 8080a793977SJakub Kicinski if (shift) 8090a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 8100a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 8110a793977SJakub Kicinski else 8120a793977SJakub Kicinski for (; i * 4 < size; i++) 8130a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8140a793977SJakub Kicinski 8150a793977SJakub Kicinski if (i < 2) 8160a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 8170a793977SJakub Kicinski 8180a793977SJakub Kicinski return 0; 8190a793977SJakub Kicinski } 8200a793977SJakub Kicinski 8210a793977SJakub Kicinski static int 8223dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 8233dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 8242ca71441SJakub Kicinski { 8252ca71441SJakub Kicinski unsigned int i; 8262ca71441SJakub Kicinski u8 mask, sz; 8272ca71441SJakub Kicinski 8283dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 8292ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 8302ca71441SJakub Kicinski */ 8312ca71441SJakub Kicinski sz = max(size, 4); 8322ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 8332ca71441SJakub Kicinski 8343dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 835b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 8362ca71441SJakub Kicinski 8372ca71441SJakub Kicinski i = 0; 8382ca71441SJakub Kicinski if (mask) 8392ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 8402ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 8412ca71441SJakub Kicinski else 8422ca71441SJakub Kicinski for (; i * 4 < size; i++) 8432ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8442ca71441SJakub Kicinski 8452ca71441SJakub Kicinski if (i < 2) 8462ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 8472ca71441SJakub Kicinski 8482ca71441SJakub Kicinski return 0; 8492ca71441SJakub Kicinski } 8502ca71441SJakub Kicinski 8512ca71441SJakub Kicinski static int 8523dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 8533dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 8543dd43c33SJakub Kicinski { 8553dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 8563dd43c33SJakub Kicinski size, CMD_MODE_32b); 8573dd43c33SJakub Kicinski } 8583dd43c33SJakub Kicinski 8593dd43c33SJakub Kicinski static int 8603dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 8613dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 8623dd43c33SJakub Kicinski { 8633dd43c33SJakub Kicinski swreg rega, regb; 8643dd43c33SJakub Kicinski 8653dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 8663dd43c33SJakub Kicinski 8673dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 8683dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 8693dd43c33SJakub Kicinski } 8703dd43c33SJakub Kicinski 8713dd43c33SJakub Kicinski static int 8720a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 8730a793977SJakub Kicinski { 8740a793977SJakub Kicinski swreg tmp_reg; 8750a793977SJakub Kicinski 876d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 877d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 8780a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 8790a793977SJakub Kicinski 880d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 881d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 882d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 883d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 88418e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 885e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8860a793977SJakub Kicinski 887d9ae7f2bSJakub Kicinski /* Load data */ 8880a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 889d9ae7f2bSJakub Kicinski } 890d9ae7f2bSJakub Kicinski 891d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 892d9ae7f2bSJakub Kicinski { 8930a793977SJakub Kicinski swreg tmp_reg; 8940a793977SJakub Kicinski 8950a793977SJakub Kicinski /* Check packet length */ 8960a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 8970a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 898e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 8990a793977SJakub Kicinski 9000a793977SJakub Kicinski /* Load data */ 9010a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9020a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 903d9ae7f2bSJakub Kicinski } 904d9ae7f2bSJakub Kicinski 905e663fe38SJakub Kicinski static int 906e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 907e663fe38SJakub Kicinski u8 src_gpr, u8 size) 908e663fe38SJakub Kicinski { 909e663fe38SJakub Kicinski unsigned int i; 910e663fe38SJakub Kicinski 911e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 912e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 913e663fe38SJakub Kicinski 914e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 915b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 916e663fe38SJakub Kicinski 917e663fe38SJakub Kicinski return 0; 918e663fe38SJakub Kicinski } 919e663fe38SJakub Kicinski 920e663fe38SJakub Kicinski static int 921e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 922e663fe38SJakub Kicinski u64 imm, u8 size) 923e663fe38SJakub Kicinski { 924e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 925e663fe38SJakub Kicinski if (size == 8) 926e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 927e663fe38SJakub Kicinski 928e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 929b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 930e663fe38SJakub Kicinski 931e663fe38SJakub Kicinski return 0; 932e663fe38SJakub Kicinski } 933e663fe38SJakub Kicinski 934ee9133a8SJakub Kicinski typedef int 935ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 9362df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9372df03a50SJakub Kicinski bool needs_inc); 938a82b23fbSJakub Kicinski 939a82b23fbSJakub Kicinski static int 940a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 9412df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9422df03a50SJakub Kicinski bool needs_inc) 943a82b23fbSJakub Kicinski { 9442df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 945a82b23fbSJakub Kicinski u32 idx, src_byte; 946a82b23fbSJakub Kicinski enum shf_sc sc; 947a82b23fbSJakub Kicinski swreg reg; 948a82b23fbSJakub Kicinski int shf; 949a82b23fbSJakub Kicinski u8 mask; 950a82b23fbSJakub Kicinski 951a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 952a82b23fbSJakub Kicinski return -EOPNOTSUPP; 953a82b23fbSJakub Kicinski 954a82b23fbSJakub Kicinski idx = off / 4; 955a82b23fbSJakub Kicinski 956a82b23fbSJakub Kicinski /* Move the entire word */ 957a82b23fbSJakub Kicinski if (size == 4) { 9582df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 9592df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 960a82b23fbSJakub Kicinski return 0; 961a82b23fbSJakub Kicinski } 962a82b23fbSJakub Kicinski 9632df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 9642df03a50SJakub Kicinski return -EOPNOTSUPP; 9652df03a50SJakub Kicinski 966a82b23fbSJakub Kicinski src_byte = off % 4; 967a82b23fbSJakub Kicinski 968a82b23fbSJakub Kicinski mask = (1 << size) - 1; 969a82b23fbSJakub Kicinski mask <<= dst_byte; 970a82b23fbSJakub Kicinski 971a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 972a82b23fbSJakub Kicinski return -EOPNOTSUPP; 973a82b23fbSJakub Kicinski 974a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 975a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 976a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 977a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 978a82b23fbSJakub Kicinski shf = 32 - shf; 979a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 980a82b23fbSJakub Kicinski } else { 981a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 982a82b23fbSJakub Kicinski } 983a82b23fbSJakub Kicinski 984a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 985a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 986a82b23fbSJakub Kicinski */ 987a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 9882df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 989a82b23fbSJakub Kicinski } else { 990a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 9919a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 9929a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 9939a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 9949a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 9959a90c83cSJakub Kicinski */ 9969a90c83cSJakub Kicinski if (first || !new_gpr) 997a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 998a82b23fbSJakub Kicinski } 999a82b23fbSJakub Kicinski 1000a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 1001a82b23fbSJakub Kicinski 10022df03a50SJakub Kicinski if (should_inc) 10032df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10042df03a50SJakub Kicinski 1005a82b23fbSJakub Kicinski return 0; 1006a82b23fbSJakub Kicinski } 1007ee9133a8SJakub Kicinski 1008ee9133a8SJakub Kicinski static int 1009ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 10102df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10112df03a50SJakub Kicinski bool needs_inc) 1012ee9133a8SJakub Kicinski { 10132df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1014ee9133a8SJakub Kicinski u32 idx, dst_byte; 1015ee9133a8SJakub Kicinski enum shf_sc sc; 1016ee9133a8SJakub Kicinski swreg reg; 1017ee9133a8SJakub Kicinski int shf; 1018ee9133a8SJakub Kicinski u8 mask; 1019ee9133a8SJakub Kicinski 1020ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 1021ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1022ee9133a8SJakub Kicinski 1023ee9133a8SJakub Kicinski idx = off / 4; 1024ee9133a8SJakub Kicinski 1025ee9133a8SJakub Kicinski /* Move the entire word */ 1026ee9133a8SJakub Kicinski if (size == 4) { 10272df03a50SJakub Kicinski wrp_mov(nfp_prog, 10282df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 10292df03a50SJakub Kicinski reg_b(src)); 1030ee9133a8SJakub Kicinski return 0; 1031ee9133a8SJakub Kicinski } 1032ee9133a8SJakub Kicinski 10332df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 10342df03a50SJakub Kicinski return -EOPNOTSUPP; 10352df03a50SJakub Kicinski 1036ee9133a8SJakub Kicinski dst_byte = off % 4; 1037ee9133a8SJakub Kicinski 1038ee9133a8SJakub Kicinski mask = (1 << size) - 1; 1039ee9133a8SJakub Kicinski mask <<= dst_byte; 1040ee9133a8SJakub Kicinski 1041ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1042ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1043ee9133a8SJakub Kicinski 1044ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1045ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 1046ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 1047ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 1048ee9133a8SJakub Kicinski shf = 32 - shf; 1049ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 1050ee9133a8SJakub Kicinski } else { 1051ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 1052ee9133a8SJakub Kicinski } 1053ee9133a8SJakub Kicinski 1054ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1055ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1056ee9133a8SJakub Kicinski */ 1057ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 10582df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1059ee9133a8SJakub Kicinski } else { 1060ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 10619a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 10629a90c83cSJakub Kicinski * the middle location will be overwritten fully. 10639a90c83cSJakub Kicinski */ 10649a90c83cSJakub Kicinski if (first || last) 1065ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1066ee9133a8SJakub Kicinski } 1067ee9133a8SJakub Kicinski 1068ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 1069ee9133a8SJakub Kicinski 10709a90c83cSJakub Kicinski if (new_gpr || last) { 1071ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1072ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 10732df03a50SJakub Kicinski if (should_inc) 10742df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10759a90c83cSJakub Kicinski } 1076ee9133a8SJakub Kicinski 1077ee9133a8SJakub Kicinski return 0; 1078ee9133a8SJakub Kicinski } 1079ee9133a8SJakub Kicinski 1080ee9133a8SJakub Kicinski static int 1081ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1082b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1083b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1084ee9133a8SJakub Kicinski { 1085d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 10869a90c83cSJakub Kicinski bool first = true, last; 10872df03a50SJakub Kicinski bool needs_inc = false; 10882df03a50SJakub Kicinski swreg stack_off_reg; 1089a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1090ee9133a8SJakub Kicinski u32 gpr_byte = 0; 10912df03a50SJakub Kicinski bool lm3 = true; 1092ee9133a8SJakub Kicinski int ret; 1093ee9133a8SJakub Kicinski 1094b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1095b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1096b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1097b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1098b14157eeSJakub Kicinski */ 1099b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1100b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1101b14157eeSJakub Kicinski 1102b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1103b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1104b14157eeSJakub Kicinski 1105b14157eeSJakub Kicinski needs_inc = true; 1106b14157eeSJakub Kicinski } else if (off + size <= 64) { 11072df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 11082df03a50SJakub Kicinski lm3 = false; 11092df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 11102df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 11112df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 11122df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 11132df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 11142df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 11152df03a50SJakub Kicinski */ 11162df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 11172df03a50SJakub Kicinski stack_imm(nfp_prog)); 11182df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11192df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11202df03a50SJakub Kicinski 11212df03a50SJakub Kicinski off %= 32; 11222df03a50SJakub Kicinski } else { 11232df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 11242df03a50SJakub Kicinski stack_imm(nfp_prog)); 11252df03a50SJakub Kicinski 11262df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11272df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11282df03a50SJakub Kicinski 11292df03a50SJakub Kicinski needs_inc = true; 11302df03a50SJakub Kicinski } 11312df03a50SJakub Kicinski if (lm3) { 11322df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 11332df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 11342df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 11352df03a50SJakub Kicinski } 11362df03a50SJakub Kicinski 1137a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1138a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1139a82b23fbSJakub Kicinski 1140ee9133a8SJakub Kicinski while (size) { 1141ee9133a8SJakub Kicinski u32 slice_end; 1142ee9133a8SJakub Kicinski u8 slice_size; 1143ee9133a8SJakub Kicinski 1144ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1145ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1146ee9133a8SJakub Kicinski slice_size = slice_end - off; 1147ee9133a8SJakub Kicinski 11489a90c83cSJakub Kicinski last = slice_size == size; 11499a90c83cSJakub Kicinski 11502df03a50SJakub Kicinski if (needs_inc) 11512df03a50SJakub Kicinski off %= 4; 11522df03a50SJakub Kicinski 1153a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 11542df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1155ee9133a8SJakub Kicinski if (ret) 1156ee9133a8SJakub Kicinski return ret; 1157ee9133a8SJakub Kicinski 1158a82b23fbSJakub Kicinski prev_gpr = gpr; 11599a90c83cSJakub Kicinski first = false; 11609a90c83cSJakub Kicinski 1161ee9133a8SJakub Kicinski gpr_byte += slice_size; 1162ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1163ee9133a8SJakub Kicinski gpr_byte -= 4; 1164ee9133a8SJakub Kicinski gpr++; 1165ee9133a8SJakub Kicinski } 1166ee9133a8SJakub Kicinski 1167ee9133a8SJakub Kicinski size -= slice_size; 1168ee9133a8SJakub Kicinski off += slice_size; 1169ee9133a8SJakub Kicinski } 1170ee9133a8SJakub Kicinski 1171ee9133a8SJakub Kicinski return 0; 1172ee9133a8SJakub Kicinski } 1173ee9133a8SJakub Kicinski 1174d9ae7f2bSJakub Kicinski static void 1175d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1176d9ae7f2bSJakub Kicinski { 1177b3f868dfSJakub Kicinski swreg tmp_reg; 1178d9ae7f2bSJakub Kicinski 1179d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1180d9ae7f2bSJakub Kicinski if (!imm) 1181d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1182d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1183d9ae7f2bSJakub Kicinski return; 1184d9ae7f2bSJakub Kicinski } 1185d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1186d9ae7f2bSJakub Kicinski if (!~imm) 1187d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1188d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1189d9ae7f2bSJakub Kicinski return; 1190d9ae7f2bSJakub Kicinski } 1191d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1192d9ae7f2bSJakub Kicinski if (!~imm) 1193d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 11945d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1195d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1196d9ae7f2bSJakub Kicinski return; 1197d9ae7f2bSJakub Kicinski } 1198d9ae7f2bSJakub Kicinski 1199d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1200d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1201d9ae7f2bSJakub Kicinski } 1202d9ae7f2bSJakub Kicinski 1203d9ae7f2bSJakub Kicinski static int 1204d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1205d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1206d9ae7f2bSJakub Kicinski { 1207d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1208d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1209d9ae7f2bSJakub Kicinski 1210d9ae7f2bSJakub Kicinski if (skip) { 1211d9ae7f2bSJakub Kicinski meta->skip = true; 1212d9ae7f2bSJakub Kicinski return 0; 1213d9ae7f2bSJakub Kicinski } 1214d9ae7f2bSJakub Kicinski 1215d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1216d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1217d9ae7f2bSJakub Kicinski 1218d9ae7f2bSJakub Kicinski return 0; 1219d9ae7f2bSJakub Kicinski } 1220d9ae7f2bSJakub Kicinski 1221d9ae7f2bSJakub Kicinski static int 1222d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1223d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1224d9ae7f2bSJakub Kicinski { 1225d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1226d9ae7f2bSJakub Kicinski 1227d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1228d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1229d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1230d9ae7f2bSJakub Kicinski 1231d9ae7f2bSJakub Kicinski return 0; 1232d9ae7f2bSJakub Kicinski } 1233d9ae7f2bSJakub Kicinski 1234d9ae7f2bSJakub Kicinski static int 1235d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1236d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1237d9ae7f2bSJakub Kicinski { 1238d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1239d9ae7f2bSJakub Kicinski 1240d9ae7f2bSJakub Kicinski if (skip) { 1241d9ae7f2bSJakub Kicinski meta->skip = true; 1242d9ae7f2bSJakub Kicinski return 0; 1243d9ae7f2bSJakub Kicinski } 1244d9ae7f2bSJakub Kicinski 1245d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1246d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1247d9ae7f2bSJakub Kicinski 1248d9ae7f2bSJakub Kicinski return 0; 1249d9ae7f2bSJakub Kicinski } 1250d9ae7f2bSJakub Kicinski 1251d9ae7f2bSJakub Kicinski static int 1252d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1253d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1254d9ae7f2bSJakub Kicinski { 1255d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1256d9ae7f2bSJakub Kicinski 1257d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1258d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1259d9ae7f2bSJakub Kicinski 1260d9ae7f2bSJakub Kicinski return 0; 1261d9ae7f2bSJakub Kicinski } 1262d9ae7f2bSJakub Kicinski 1263d9ae7f2bSJakub Kicinski static void 1264d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1265d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1266d9ae7f2bSJakub Kicinski { 1267d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1268d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1269d9ae7f2bSJakub Kicinski } 1270d9ae7f2bSJakub Kicinski 1271d9ae7f2bSJakub Kicinski static int 1272d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1273d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1274d9ae7f2bSJakub Kicinski { 1275d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1276d9ae7f2bSJakub Kicinski 1277d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1278d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1279d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1280d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1281d9ae7f2bSJakub Kicinski 1282d9ae7f2bSJakub Kicinski return 0; 1283d9ae7f2bSJakub Kicinski } 1284d9ae7f2bSJakub Kicinski 128561dd8f00SJakub Kicinski static const struct jmp_code_map { 128661dd8f00SJakub Kicinski enum br_mask br_mask; 128761dd8f00SJakub Kicinski bool swap; 128861dd8f00SJakub Kicinski } jmp_code_map[] = { 128961dd8f00SJakub Kicinski [BPF_JGT >> 4] = { BR_BLO, true }, 129061dd8f00SJakub Kicinski [BPF_JGE >> 4] = { BR_BHS, false }, 129161dd8f00SJakub Kicinski [BPF_JLT >> 4] = { BR_BLO, false }, 129261dd8f00SJakub Kicinski [BPF_JLE >> 4] = { BR_BHS, true }, 129361dd8f00SJakub Kicinski [BPF_JSGT >> 4] = { BR_BLT, true }, 129461dd8f00SJakub Kicinski [BPF_JSGE >> 4] = { BR_BGE, false }, 129561dd8f00SJakub Kicinski [BPF_JSLT >> 4] = { BR_BLT, false }, 129661dd8f00SJakub Kicinski [BPF_JSLE >> 4] = { BR_BGE, true }, 129761dd8f00SJakub Kicinski }; 129861dd8f00SJakub Kicinski 129961dd8f00SJakub Kicinski static const struct jmp_code_map *nfp_jmp_code_get(struct nfp_insn_meta *meta) 130061dd8f00SJakub Kicinski { 130161dd8f00SJakub Kicinski unsigned int op; 130261dd8f00SJakub Kicinski 130361dd8f00SJakub Kicinski op = BPF_OP(meta->insn.code) >> 4; 130461dd8f00SJakub Kicinski /* br_mask of 0 is BR_BEQ which we don't use in jump code table */ 130561dd8f00SJakub Kicinski if (WARN_ONCE(op >= ARRAY_SIZE(jmp_code_map) || 130661dd8f00SJakub Kicinski !jmp_code_map[op].br_mask, 130761dd8f00SJakub Kicinski "no code found for jump instruction")) 130861dd8f00SJakub Kicinski return NULL; 130961dd8f00SJakub Kicinski 131061dd8f00SJakub Kicinski return &jmp_code_map[op]; 131161dd8f00SJakub Kicinski } 131261dd8f00SJakub Kicinski 131361dd8f00SJakub Kicinski static int cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1314d9ae7f2bSJakub Kicinski { 1315d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1316d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 131761dd8f00SJakub Kicinski const struct jmp_code_map *code; 13187bdc97beSJakub Kicinski enum alu_op alu_op, carry_op; 1319d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1320b3f868dfSJakub Kicinski swreg tmp_reg; 1321d9ae7f2bSJakub Kicinski 132261dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 132361dd8f00SJakub Kicinski if (!code) 132461dd8f00SJakub Kicinski return -EINVAL; 132561dd8f00SJakub Kicinski 13267bdc97beSJakub Kicinski alu_op = meta->jump_neg_op ? ALU_OP_ADD : ALU_OP_SUB; 13277bdc97beSJakub Kicinski carry_op = meta->jump_neg_op ? ALU_OP_ADD_C : ALU_OP_SUB_C; 13287bdc97beSJakub Kicinski 1329d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 133061dd8f00SJakub Kicinski if (!code->swap) 13317bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), alu_op, tmp_reg); 1332d9ae7f2bSJakub Kicinski else 13337bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, alu_op, reg_a(reg)); 1334d9ae7f2bSJakub Kicinski 1335d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 133661dd8f00SJakub Kicinski if (!code->swap) 1337d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 13387bdc97beSJakub Kicinski reg_a(reg + 1), carry_op, tmp_reg); 1339d9ae7f2bSJakub Kicinski else 1340d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 13417bdc97beSJakub Kicinski tmp_reg, carry_op, reg_a(reg + 1)); 1342d9ae7f2bSJakub Kicinski 134361dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1344d9ae7f2bSJakub Kicinski 1345d9ae7f2bSJakub Kicinski return 0; 1346d9ae7f2bSJakub Kicinski } 1347d9ae7f2bSJakub Kicinski 134861dd8f00SJakub Kicinski static int cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1349d9ae7f2bSJakub Kicinski { 1350d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 135161dd8f00SJakub Kicinski const struct jmp_code_map *code; 135226fa818dSJakub Kicinski u8 areg, breg; 135326fa818dSJakub Kicinski 135461dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 135561dd8f00SJakub Kicinski if (!code) 135661dd8f00SJakub Kicinski return -EINVAL; 135761dd8f00SJakub Kicinski 135826fa818dSJakub Kicinski areg = insn->dst_reg * 2; 135926fa818dSJakub Kicinski breg = insn->src_reg * 2; 1360d9ae7f2bSJakub Kicinski 136161dd8f00SJakub Kicinski if (code->swap) { 1362d9ae7f2bSJakub Kicinski areg ^= breg; 1363d9ae7f2bSJakub Kicinski breg ^= areg; 1364d9ae7f2bSJakub Kicinski areg ^= breg; 1365d9ae7f2bSJakub Kicinski } 1366d9ae7f2bSJakub Kicinski 1367d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1368d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1369d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 137061dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1371d9ae7f2bSJakub Kicinski 1372d9ae7f2bSJakub Kicinski return 0; 1373d9ae7f2bSJakub Kicinski } 1374d9ae7f2bSJakub Kicinski 13753119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 13763119d1fdSJakub Kicinski { 13773119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 13783119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 13793119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 13803119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 13813119d1fdSJakub Kicinski } 13823119d1fdSJakub Kicinski 13830d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 13840d49eaf4SJakub Kicinski { 13850d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 13860d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 13870d49eaf4SJakub Kicinski u32 ret_einval, end; 13880d49eaf4SJakub Kicinski 13890d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 13900d49eaf4SJakub Kicinski 13918231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 13928231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 13938231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 13948231f844SJakub Kicinski return -EINVAL; 13958231f844SJakub Kicinski 13968231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 13978231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 13988231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 13998231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14008231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 14018231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14028231f844SJakub Kicinski 14038231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 14048231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 14058231f844SJakub Kicinski 14068231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 14078231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 14088231f844SJakub Kicinski */ 14098231f844SJakub Kicinski 14108231f844SJakub Kicinski return 0; 14118231f844SJakub Kicinski } 14128231f844SJakub Kicinski 14130d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 14140d49eaf4SJakub Kicinski end = ret_einval + 2; 14150d49eaf4SJakub Kicinski 14160d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 14170d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 14180d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 14190d49eaf4SJakub Kicinski 14200d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 14210d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 14220d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 14230d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 14240d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 14250d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 14260d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 14270d49eaf4SJakub Kicinski 14280d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 14290d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 14300d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14310d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 14320d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 14330d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 14340d49eaf4SJakub Kicinski 14350d49eaf4SJakub Kicinski /* Load the ret code */ 14360d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 14370d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 14380d49eaf4SJakub Kicinski 14390d49eaf4SJakub Kicinski /* Modify the packet metadata */ 14400d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 14410d49eaf4SJakub Kicinski 14420d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 14432314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 14440d49eaf4SJakub Kicinski 14450d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 14460d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14470d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 14480d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 14490d49eaf4SJakub Kicinski 14500d49eaf4SJakub Kicinski /* return -EINVAL target */ 14510d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 14520d49eaf4SJakub Kicinski return -EINVAL; 14530d49eaf4SJakub Kicinski 14540d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 14550d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 14560d49eaf4SJakub Kicinski 14570d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 14580d49eaf4SJakub Kicinski return -EINVAL; 14590d49eaf4SJakub Kicinski 14600d49eaf4SJakub Kicinski return 0; 14610d49eaf4SJakub Kicinski } 14620d49eaf4SJakub Kicinski 146377a3d311SJakub Kicinski static int 1464fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 146577a3d311SJakub Kicinski { 146677a3d311SJakub Kicinski bool load_lm_ptr; 146777a3d311SJakub Kicinski u32 ret_tgt; 146877a3d311SJakub Kicinski s64 lm_off; 146977a3d311SJakub Kicinski 147077a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 147177a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 14722f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 14732f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 147477a3d311SJakub Kicinski 147577a3d311SJakub Kicinski /* Set LM0 to start of key */ 147677a3d311SJakub Kicinski if (load_lm_ptr) 147777a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 147844d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 147944d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 148077a3d311SJakub Kicinski 1481fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 148277a3d311SJakub Kicinski 2, RELO_BR_HELPER); 148377a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 148477a3d311SJakub Kicinski 148577a3d311SJakub Kicinski /* Load map ID into A0 */ 1486b4264c96SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), reg_a(2)); 148777a3d311SJakub Kicinski 148877a3d311SJakub Kicinski /* Load the return address into B0 */ 148977a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 149077a3d311SJakub Kicinski 149177a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 149277a3d311SJakub Kicinski return -EINVAL; 149377a3d311SJakub Kicinski 149477a3d311SJakub Kicinski /* Reset the LM0 pointer */ 149577a3d311SJakub Kicinski if (!load_lm_ptr) 149677a3d311SJakub Kicinski return 0; 149777a3d311SJakub Kicinski 149877a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 149977a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 150077a3d311SJakub Kicinski 150177a3d311SJakub Kicinski return 0; 150277a3d311SJakub Kicinski } 150377a3d311SJakub Kicinski 1504df4a37d8SJakub Kicinski static int 1505df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1506df4a37d8SJakub Kicinski { 1507df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1508df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1509df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1510df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1511df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1512df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1513df4a37d8SJakub Kicinski return 0; 1514df4a37d8SJakub Kicinski } 1515df4a37d8SJakub Kicinski 15169816dd35SJakub Kicinski static int 15179816dd35SJakub Kicinski nfp_perf_event_output(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 15189816dd35SJakub Kicinski { 15199816dd35SJakub Kicinski swreg ptr_type; 15209816dd35SJakub Kicinski u32 ret_tgt; 15219816dd35SJakub Kicinski 15229816dd35SJakub Kicinski ptr_type = ur_load_imm_any(nfp_prog, meta->arg1.type, imm_a(nfp_prog)); 15239816dd35SJakub Kicinski 15249816dd35SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 15259816dd35SJakub Kicinski 15269816dd35SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 15279816dd35SJakub Kicinski 2, RELO_BR_HELPER); 15289816dd35SJakub Kicinski 15299816dd35SJakub Kicinski /* Load ptr type into A1 */ 15309816dd35SJakub Kicinski wrp_mov(nfp_prog, reg_a(1), ptr_type); 15319816dd35SJakub Kicinski 15329816dd35SJakub Kicinski /* Load the return address into B0 */ 15339816dd35SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 15349816dd35SJakub Kicinski 15359816dd35SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 15369816dd35SJakub Kicinski return -EINVAL; 15379816dd35SJakub Kicinski 15389816dd35SJakub Kicinski return 0; 15399816dd35SJakub Kicinski } 15409816dd35SJakub Kicinski 1541d985888fSJakub Kicinski static int 1542d985888fSJakub Kicinski nfp_queue_select(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1543d985888fSJakub Kicinski { 1544d985888fSJakub Kicinski u32 jmp_tgt; 1545d985888fSJakub Kicinski 1546d985888fSJakub Kicinski jmp_tgt = nfp_prog_current_offset(nfp_prog) + 5; 1547d985888fSJakub Kicinski 1548d985888fSJakub Kicinski /* Make sure the queue id fits into FW field */ 1549d985888fSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(meta->insn.src_reg * 2), 1550d985888fSJakub Kicinski ALU_OP_AND_NOT_B, reg_imm(0xff)); 1551d985888fSJakub Kicinski emit_br(nfp_prog, BR_BEQ, jmp_tgt, 2); 1552d985888fSJakub Kicinski 1553d985888fSJakub Kicinski /* Set the 'queue selected' bit and the queue value */ 1554d985888fSJakub Kicinski emit_shf(nfp_prog, pv_qsel_set(nfp_prog), 1555d985888fSJakub Kicinski pv_qsel_set(nfp_prog), SHF_OP_OR, reg_imm(1), 1556d985888fSJakub Kicinski SHF_SC_L_SHF, PKT_VEL_QSEL_SET_BIT); 1557d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1558d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_b(meta->insn.src_reg * 2), 1559d985888fSJakub Kicinski SHF_SC_NONE, 0); 1560d985888fSJakub Kicinski /* Delay slots end here, we will jump over next instruction if queue 1561d985888fSJakub Kicinski * value fits into the field. 1562d985888fSJakub Kicinski */ 1563d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1564d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_imm(NFP_NET_RXR_MAX), 1565d985888fSJakub Kicinski SHF_SC_NONE, 0); 1566d985888fSJakub Kicinski 1567d985888fSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, jmp_tgt)) 1568d985888fSJakub Kicinski return -EINVAL; 1569d985888fSJakub Kicinski 1570d985888fSJakub Kicinski return 0; 1571d985888fSJakub Kicinski } 1572d985888fSJakub Kicinski 1573d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1574d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1575d9ae7f2bSJakub Kicinski { 1576d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1577b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1578b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1579d9ae7f2bSJakub Kicinski 1580b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1581b14157eeSJakub Kicinski swreg stack_depth_reg; 1582b14157eeSJakub Kicinski 1583b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1584b14157eeSJakub Kicinski nfp_prog->stack_depth, 1585b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1586b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1587b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1588b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1589b14157eeSJakub Kicinski } else { 1590b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1591b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1592b14157eeSJakub Kicinski } 1593d9ae7f2bSJakub Kicinski 1594d9ae7f2bSJakub Kicinski return 0; 1595d9ae7f2bSJakub Kicinski } 1596d9ae7f2bSJakub Kicinski 1597d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1598d9ae7f2bSJakub Kicinski { 1599d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1600d9ae7f2bSJakub Kicinski 1601d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1602d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1603d9ae7f2bSJakub Kicinski 1604d9ae7f2bSJakub Kicinski return 0; 1605d9ae7f2bSJakub Kicinski } 1606d9ae7f2bSJakub Kicinski 1607d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1608d9ae7f2bSJakub Kicinski { 1609d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1610d9ae7f2bSJakub Kicinski } 1611d9ae7f2bSJakub Kicinski 1612d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1613d9ae7f2bSJakub Kicinski { 1614d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1615d9ae7f2bSJakub Kicinski } 1616d9ae7f2bSJakub Kicinski 1617d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1618d9ae7f2bSJakub Kicinski { 1619d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1620d9ae7f2bSJakub Kicinski } 1621d9ae7f2bSJakub Kicinski 1622d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1623d9ae7f2bSJakub Kicinski { 1624d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1625d9ae7f2bSJakub Kicinski } 1626d9ae7f2bSJakub Kicinski 1627d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1628d9ae7f2bSJakub Kicinski { 1629d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1630d9ae7f2bSJakub Kicinski } 1631d9ae7f2bSJakub Kicinski 1632d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1633d9ae7f2bSJakub Kicinski { 1634d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1635d9ae7f2bSJakub Kicinski } 1636d9ae7f2bSJakub Kicinski 1637d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1638d9ae7f2bSJakub Kicinski { 1639d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1640d9ae7f2bSJakub Kicinski 1641d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1642d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1643d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1644d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1645d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1646d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1647d9ae7f2bSJakub Kicinski 1648d9ae7f2bSJakub Kicinski return 0; 1649d9ae7f2bSJakub Kicinski } 1650d9ae7f2bSJakub Kicinski 1651d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1652d9ae7f2bSJakub Kicinski { 1653d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1654d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1655d9ae7f2bSJakub Kicinski 1656d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1657d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1658d9ae7f2bSJakub Kicinski 1659d9ae7f2bSJakub Kicinski return 0; 1660d9ae7f2bSJakub Kicinski } 1661d9ae7f2bSJakub Kicinski 1662d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1663d9ae7f2bSJakub Kicinski { 1664d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1665d9ae7f2bSJakub Kicinski 1666d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1667d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1668d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1669d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1670d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1671d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1672d9ae7f2bSJakub Kicinski 1673d9ae7f2bSJakub Kicinski return 0; 1674d9ae7f2bSJakub Kicinski } 1675d9ae7f2bSJakub Kicinski 1676d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1677d9ae7f2bSJakub Kicinski { 1678d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1679d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1680d9ae7f2bSJakub Kicinski 1681d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1682d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1683d9ae7f2bSJakub Kicinski 1684d9ae7f2bSJakub Kicinski return 0; 1685d9ae7f2bSJakub Kicinski } 1686d9ae7f2bSJakub Kicinski 1687254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1688254ef4d7SJiong Wang { 1689254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1690254ef4d7SJiong Wang 1691254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1692254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1693254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1694254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1695254ef4d7SJiong Wang 1696254ef4d7SJiong Wang return 0; 1697254ef4d7SJiong Wang } 1698254ef4d7SJiong Wang 1699991f5b36SJiong Wang /* Pseudo code: 1700991f5b36SJiong Wang * if shift_amt >= 32 1701991f5b36SJiong Wang * dst_high = dst_low << shift_amt[4:0] 1702991f5b36SJiong Wang * dst_low = 0; 1703991f5b36SJiong Wang * else 1704991f5b36SJiong Wang * dst_high = (dst_high, dst_low) >> (32 - shift_amt) 1705991f5b36SJiong Wang * dst_low = dst_low << shift_amt 1706991f5b36SJiong Wang * 1707991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1708991f5b36SJiong Wang */ 1709991f5b36SJiong Wang static int __shl_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1710991f5b36SJiong Wang { 1711991f5b36SJiong Wang if (shift_amt < 32) { 1712991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), 1713991f5b36SJiong Wang SHF_OP_NONE, reg_b(dst), SHF_SC_R_DSHF, 1714991f5b36SJiong Wang 32 - shift_amt); 1715991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1716991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 1717991f5b36SJiong Wang } else if (shift_amt == 32) { 1718991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst + 1, dst); 1719991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1720991f5b36SJiong Wang } else if (shift_amt > 32) { 1721991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1722991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt - 32); 1723991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1724991f5b36SJiong Wang } 1725991f5b36SJiong Wang 1726991f5b36SJiong Wang return 0; 1727991f5b36SJiong Wang } 1728991f5b36SJiong Wang 1729d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1730d9ae7f2bSJakub Kicinski { 1731d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 17323cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1733d9ae7f2bSJakub Kicinski 1734991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, insn->imm); 1735991f5b36SJiong Wang } 1736991f5b36SJiong Wang 1737991f5b36SJiong Wang static void shl_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1738991f5b36SJiong Wang { 1739991f5b36SJiong Wang emit_alu(nfp_prog, imm_both(nfp_prog), reg_imm(32), ALU_OP_SUB, 1740991f5b36SJiong Wang reg_b(src)); 1741991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, reg_imm(0)); 1742991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), SHF_OP_NONE, 1743991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 1744991f5b36SJiong Wang } 1745991f5b36SJiong Wang 1746991f5b36SJiong Wang /* NOTE: for indirect left shift, HIGH part should be calculated first. */ 1747991f5b36SJiong Wang static void shl_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1748991f5b36SJiong Wang { 1749991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1750991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1751991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 1752991f5b36SJiong Wang } 1753991f5b36SJiong Wang 1754991f5b36SJiong Wang static void shl_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1755991f5b36SJiong Wang { 1756991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 1757991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 1758991f5b36SJiong Wang } 1759991f5b36SJiong Wang 1760991f5b36SJiong Wang static void shl_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1761991f5b36SJiong Wang { 1762991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1763991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1764991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 17653cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1766991f5b36SJiong Wang } 1767991f5b36SJiong Wang 1768991f5b36SJiong Wang static int shl_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1769991f5b36SJiong Wang { 1770991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 1771991f5b36SJiong Wang u64 umin, umax; 1772991f5b36SJiong Wang u8 dst, src; 1773991f5b36SJiong Wang 1774991f5b36SJiong Wang dst = insn->dst_reg * 2; 1775991f5b36SJiong Wang umin = meta->umin; 1776991f5b36SJiong Wang umax = meta->umax; 1777991f5b36SJiong Wang if (umin == umax) 1778991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, umin); 1779991f5b36SJiong Wang 1780991f5b36SJiong Wang src = insn->src_reg * 2; 1781991f5b36SJiong Wang if (umax < 32) { 1782991f5b36SJiong Wang shl_reg64_lt32(nfp_prog, dst, src); 1783991f5b36SJiong Wang } else if (umin >= 32) { 1784991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 1785991f5b36SJiong Wang } else { 1786991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 1787991f5b36SJiong Wang * value of shift amount. 1788991f5b36SJiong Wang */ 1789991f5b36SJiong Wang u16 label_ge32, label_end; 1790991f5b36SJiong Wang 1791991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 7; 1792991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 1793991f5b36SJiong Wang 1794991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 1795991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 1796991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 1797991f5b36SJiong Wang /* shl_reg64_lt32_low packed in delay slot. */ 1798991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 1799991f5b36SJiong Wang 1800991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 1801991f5b36SJiong Wang return -EINVAL; 1802991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 1803991f5b36SJiong Wang 1804991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 1805991f5b36SJiong Wang return -EINVAL; 1806991f5b36SJiong Wang } 1807991f5b36SJiong Wang 1808991f5b36SJiong Wang return 0; 1809991f5b36SJiong Wang } 1810991f5b36SJiong Wang 1811991f5b36SJiong Wang /* Pseudo code: 1812991f5b36SJiong Wang * if shift_amt >= 32 1813991f5b36SJiong Wang * dst_high = 0; 1814991f5b36SJiong Wang * dst_low = dst_high >> shift_amt[4:0] 1815991f5b36SJiong Wang * else 1816991f5b36SJiong Wang * dst_high = dst_high >> shift_amt 1817991f5b36SJiong Wang * dst_low = (dst_high, dst_low) >> shift_amt 1818991f5b36SJiong Wang * 1819991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1820991f5b36SJiong Wang */ 1821991f5b36SJiong Wang static int __shr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1822991f5b36SJiong Wang { 1823991f5b36SJiong Wang if (shift_amt < 32) { 1824991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 1825991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 1826991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1827991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 1828991f5b36SJiong Wang } else if (shift_amt == 32) { 1829991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 1830991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1831991f5b36SJiong Wang } else if (shift_amt > 32) { 1832991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1833991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 1834991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 18353cae1319SJakub Kicinski } 1836d9ae7f2bSJakub Kicinski 1837d9ae7f2bSJakub Kicinski return 0; 1838d9ae7f2bSJakub Kicinski } 1839d9ae7f2bSJakub Kicinski 1840d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1841d9ae7f2bSJakub Kicinski { 1842d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 18433cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1844d9ae7f2bSJakub Kicinski 1845991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, insn->imm); 1846991f5b36SJiong Wang } 1847991f5b36SJiong Wang 1848991f5b36SJiong Wang /* NOTE: for indirect right shift, LOW part should be calculated first. */ 1849991f5b36SJiong Wang static void shr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1850991f5b36SJiong Wang { 1851991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1852991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1853991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 1854991f5b36SJiong Wang } 1855991f5b36SJiong Wang 1856991f5b36SJiong Wang static void shr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1857991f5b36SJiong Wang { 1858991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1859991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 1860991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 1861991f5b36SJiong Wang } 1862991f5b36SJiong Wang 1863991f5b36SJiong Wang static void shr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1864991f5b36SJiong Wang { 1865991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 1866991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 1867991f5b36SJiong Wang } 1868991f5b36SJiong Wang 1869991f5b36SJiong Wang static void shr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1870991f5b36SJiong Wang { 1871991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1872991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1873991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 18743cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1875991f5b36SJiong Wang } 1876991f5b36SJiong Wang 1877991f5b36SJiong Wang static int shr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1878991f5b36SJiong Wang { 1879991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 1880991f5b36SJiong Wang u64 umin, umax; 1881991f5b36SJiong Wang u8 dst, src; 1882991f5b36SJiong Wang 1883991f5b36SJiong Wang dst = insn->dst_reg * 2; 1884991f5b36SJiong Wang umin = meta->umin; 1885991f5b36SJiong Wang umax = meta->umax; 1886991f5b36SJiong Wang if (umin == umax) 1887991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, umin); 1888991f5b36SJiong Wang 1889991f5b36SJiong Wang src = insn->src_reg * 2; 1890991f5b36SJiong Wang if (umax < 32) { 1891991f5b36SJiong Wang shr_reg64_lt32(nfp_prog, dst, src); 1892991f5b36SJiong Wang } else if (umin >= 32) { 1893991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 1894991f5b36SJiong Wang } else { 1895991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 1896991f5b36SJiong Wang * value of shift amount. 1897991f5b36SJiong Wang */ 1898991f5b36SJiong Wang u16 label_ge32, label_end; 1899991f5b36SJiong Wang 1900991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 1901991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 1902991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 1903991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 1904991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 1905991f5b36SJiong Wang /* shr_reg64_lt32_high packed in delay slot. */ 1906991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 1907991f5b36SJiong Wang 1908991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 1909991f5b36SJiong Wang return -EINVAL; 1910991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 1911991f5b36SJiong Wang 1912991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 1913991f5b36SJiong Wang return -EINVAL; 19143cae1319SJakub Kicinski } 1915d9ae7f2bSJakub Kicinski 1916d9ae7f2bSJakub Kicinski return 0; 1917d9ae7f2bSJakub Kicinski } 1918d9ae7f2bSJakub Kicinski 1919d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1920d9ae7f2bSJakub Kicinski { 1921d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1922d9ae7f2bSJakub Kicinski 1923d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 1924d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1925d9ae7f2bSJakub Kicinski 1926d9ae7f2bSJakub Kicinski return 0; 1927d9ae7f2bSJakub Kicinski } 1928d9ae7f2bSJakub Kicinski 1929d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1930d9ae7f2bSJakub Kicinski { 1931d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1932d9ae7f2bSJakub Kicinski 1933d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 1934d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1935d9ae7f2bSJakub Kicinski 1936d9ae7f2bSJakub Kicinski return 0; 1937d9ae7f2bSJakub Kicinski } 1938d9ae7f2bSJakub Kicinski 1939d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1940d9ae7f2bSJakub Kicinski { 1941d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 1942d9ae7f2bSJakub Kicinski } 1943d9ae7f2bSJakub Kicinski 1944d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1945d9ae7f2bSJakub Kicinski { 1946d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 1947d9ae7f2bSJakub Kicinski } 1948d9ae7f2bSJakub Kicinski 1949d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1950d9ae7f2bSJakub Kicinski { 1951d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 1952d9ae7f2bSJakub Kicinski } 1953d9ae7f2bSJakub Kicinski 1954d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1955d9ae7f2bSJakub Kicinski { 1956d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1957d9ae7f2bSJakub Kicinski } 1958d9ae7f2bSJakub Kicinski 1959d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1960d9ae7f2bSJakub Kicinski { 1961d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 1962d9ae7f2bSJakub Kicinski } 1963d9ae7f2bSJakub Kicinski 1964d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1965d9ae7f2bSJakub Kicinski { 1966d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1967d9ae7f2bSJakub Kicinski } 1968d9ae7f2bSJakub Kicinski 1969d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1970d9ae7f2bSJakub Kicinski { 1971d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 1972d9ae7f2bSJakub Kicinski } 1973d9ae7f2bSJakub Kicinski 1974d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1975d9ae7f2bSJakub Kicinski { 1976d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 1977d9ae7f2bSJakub Kicinski } 1978d9ae7f2bSJakub Kicinski 1979d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1980d9ae7f2bSJakub Kicinski { 1981d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 1982d9ae7f2bSJakub Kicinski } 1983d9ae7f2bSJakub Kicinski 1984d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1985d9ae7f2bSJakub Kicinski { 1986d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 1987d9ae7f2bSJakub Kicinski } 1988d9ae7f2bSJakub Kicinski 1989254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1990254ef4d7SJiong Wang { 1991254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 1992254ef4d7SJiong Wang 1993254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 1994254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1995254ef4d7SJiong Wang 1996254ef4d7SJiong Wang return 0; 1997254ef4d7SJiong Wang } 1998254ef4d7SJiong Wang 1999d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2000d9ae7f2bSJakub Kicinski { 2001d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2002d9ae7f2bSJakub Kicinski 2003d9ae7f2bSJakub Kicinski if (!insn->imm) 2004d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 2005d9ae7f2bSJakub Kicinski 2006d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 2007d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 2008d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 2009d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2010d9ae7f2bSJakub Kicinski 2011d9ae7f2bSJakub Kicinski return 0; 2012d9ae7f2bSJakub Kicinski } 2013d9ae7f2bSJakub Kicinski 20143119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 20153119d1fdSJakub Kicinski { 20163119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 20173119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 20183119d1fdSJakub Kicinski 20193119d1fdSJakub Kicinski switch (insn->imm) { 20203119d1fdSJakub Kicinski case 16: 20213119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 20223119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 20233119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 20243119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 20253119d1fdSJakub Kicinski 20263119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 20273119d1fdSJakub Kicinski break; 20283119d1fdSJakub Kicinski case 32: 20293119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 20303119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 20313119d1fdSJakub Kicinski break; 20323119d1fdSJakub Kicinski case 64: 20333119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 20343119d1fdSJakub Kicinski 20353119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 20363119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 20373119d1fdSJakub Kicinski break; 20383119d1fdSJakub Kicinski } 20393119d1fdSJakub Kicinski 20403119d1fdSJakub Kicinski return 0; 20413119d1fdSJakub Kicinski } 20423119d1fdSJakub Kicinski 2043d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2044d9ae7f2bSJakub Kicinski { 20459f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 20469f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 20479f16c8abSJakub Kicinski u8 dst; 20489f16c8abSJakub Kicinski 20499f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 20509f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 20519f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 20529f16c8abSJakub Kicinski 20539f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 20549f16c8abSJakub Kicinski 20559f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 20569f16c8abSJakub Kicinski if (imm_hi == imm_lo) 20579f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 20589f16c8abSJakub Kicinski else 20599f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 2060d9ae7f2bSJakub Kicinski 2061d9ae7f2bSJakub Kicinski return 0; 2062d9ae7f2bSJakub Kicinski } 2063d9ae7f2bSJakub Kicinski 2064d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2065d9ae7f2bSJakub Kicinski { 2066d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 2067d9ae7f2bSJakub Kicinski return 0; 2068d9ae7f2bSJakub Kicinski } 2069d9ae7f2bSJakub Kicinski 2070d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2071d9ae7f2bSJakub Kicinski { 2072d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 2073d9ae7f2bSJakub Kicinski } 2074d9ae7f2bSJakub Kicinski 2075d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2076d9ae7f2bSJakub Kicinski { 2077d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 2078d9ae7f2bSJakub Kicinski } 2079d9ae7f2bSJakub Kicinski 2080d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2081d9ae7f2bSJakub Kicinski { 2082d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 2083d9ae7f2bSJakub Kicinski } 2084d9ae7f2bSJakub Kicinski 2085d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2086d9ae7f2bSJakub Kicinski { 2087d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 20880a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 2089d9ae7f2bSJakub Kicinski } 2090d9ae7f2bSJakub Kicinski 2091d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2092d9ae7f2bSJakub Kicinski { 2093d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 20940a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 2095d9ae7f2bSJakub Kicinski } 2096d9ae7f2bSJakub Kicinski 2097d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2098d9ae7f2bSJakub Kicinski { 2099d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 21000a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 2101d9ae7f2bSJakub Kicinski } 2102d9ae7f2bSJakub Kicinski 2103a82b23fbSJakub Kicinski static int 2104a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2105d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2106a82b23fbSJakub Kicinski { 2107d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2108b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 2109b14157eeSJakub Kicinski true, wrp_lmem_load); 2110a82b23fbSJakub Kicinski } 2111a82b23fbSJakub Kicinski 2112943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2113943c57b9SJakub Kicinski u8 size) 2114d9ae7f2bSJakub Kicinski { 2115bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2116bfddbc8aSJakub Kicinski 2117943c57b9SJakub Kicinski switch (meta->insn.off) { 2118c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 2119c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 2120943c57b9SJakub Kicinski return -EOPNOTSUPP; 2121bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 2122bfddbc8aSJakub Kicinski break; 2123c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 2124c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 2125bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2126bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2127bfddbc8aSJakub Kicinski break; 2128c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 2129c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 2130bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2131bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 2132bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2133943c57b9SJakub Kicinski break; 2134943c57b9SJakub Kicinski default: 2135d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2136943c57b9SJakub Kicinski } 2137943c57b9SJakub Kicinski 2138943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2139d9ae7f2bSJakub Kicinski 2140d9ae7f2bSJakub Kicinski return 0; 2141d9ae7f2bSJakub Kicinski } 2142d9ae7f2bSJakub Kicinski 2143943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2144943c57b9SJakub Kicinski u8 size) 2145d9ae7f2bSJakub Kicinski { 2146b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2147d9ae7f2bSJakub Kicinski 2148943c57b9SJakub Kicinski switch (meta->insn.off) { 2149c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 2150c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 2151c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2152c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2153943c57b9SJakub Kicinski break; 2154c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 2155c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 2156c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2157943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 2158943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2159943c57b9SJakub Kicinski break; 2160943c57b9SJakub Kicinski default: 2161943c57b9SJakub Kicinski return -EOPNOTSUPP; 2162943c57b9SJakub Kicinski } 2163d9ae7f2bSJakub Kicinski 2164943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2165d9ae7f2bSJakub Kicinski 2166d9ae7f2bSJakub Kicinski return 0; 2167d9ae7f2bSJakub Kicinski } 2168d9ae7f2bSJakub Kicinski 21692ca71441SJakub Kicinski static int 21702ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 21712ca71441SJakub Kicinski unsigned int size) 21722ca71441SJakub Kicinski { 21732ca71441SJakub Kicinski swreg tmp_reg; 21742ca71441SJakub Kicinski 21752ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 21762ca71441SJakub Kicinski 21773dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 21783dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 21793dd43c33SJakub Kicinski } 21803dd43c33SJakub Kicinski 21813dd43c33SJakub Kicinski static int 21823dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 21833dd43c33SJakub Kicinski unsigned int size) 21843dd43c33SJakub Kicinski { 21853dd43c33SJakub Kicinski swreg tmp_reg; 21863dd43c33SJakub Kicinski 21873dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 21883dd43c33SJakub Kicinski 21893dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 21903dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 21912ca71441SJakub Kicinski } 21922ca71441SJakub Kicinski 2193be759237SJiong Wang static void 2194be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 2195be759237SJiong Wang struct nfp_insn_meta *meta) 2196be759237SJiong Wang { 2197be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 2198be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 2199be759237SJiong Wang swreg src_base, off; 2200be759237SJiong Wang u8 xfer_num, len; 2201be759237SJiong Wang bool indir; 2202be759237SJiong Wang 2203be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 2204be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 2205be759237SJiong Wang len = range_end - range_start; 2206be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 2207be759237SJiong Wang 2208be759237SJiong Wang indir = len > 8 * REG_WIDTH; 2209be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 2210be759237SJiong Wang if (indir) 2211be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 2212be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 2213be759237SJiong Wang 2214be759237SJiong Wang /* Cache memory into transfer-in registers. */ 2215be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 2216b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 2217be759237SJiong Wang } 2218be759237SJiong Wang 2219be759237SJiong Wang static int 222091ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 222191ff69e8SJiong Wang struct nfp_insn_meta *meta, 222291ff69e8SJiong Wang unsigned int size) 222391ff69e8SJiong Wang { 222491ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 222591ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 222691ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 222791ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 222891ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 222991ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 223091ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 223191ff69e8SJiong Wang 223291ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 223391ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 223491ff69e8SJiong Wang src_lo = reg_xfer(idx); 223591ff69e8SJiong Wang 223691ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 223791ff69e8SJiong Wang if (size > REG_WIDTH - off) { 223891ff69e8SJiong Wang /* Calculate the part in the second register. */ 223991ff69e8SJiong Wang len_lo = REG_WIDTH - off; 224091ff69e8SJiong Wang len_mid = size - len_lo; 224191ff69e8SJiong Wang 224291ff69e8SJiong Wang /* Calculate the part in the third register. */ 224391ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 224491ff69e8SJiong Wang len_mid = REG_WIDTH; 224591ff69e8SJiong Wang } 224691ff69e8SJiong Wang 224791ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 224891ff69e8SJiong Wang 224991ff69e8SJiong Wang if (!len_mid) { 225091ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 225191ff69e8SJiong Wang return 0; 225291ff69e8SJiong Wang } 225391ff69e8SJiong Wang 225491ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 225591ff69e8SJiong Wang 225691ff69e8SJiong Wang if (size <= REG_WIDTH) { 225791ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 225891ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 225991ff69e8SJiong Wang } else { 226091ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 226191ff69e8SJiong Wang 226291ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 226391ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 226491ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 226591ff69e8SJiong Wang REG_WIDTH - len_lo); 226691ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 226791ff69e8SJiong Wang len_lo); 226891ff69e8SJiong Wang } 226991ff69e8SJiong Wang 227091ff69e8SJiong Wang return 0; 227191ff69e8SJiong Wang } 227291ff69e8SJiong Wang 227391ff69e8SJiong Wang static int 2274be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 2275be759237SJiong Wang struct nfp_insn_meta *meta, 2276be759237SJiong Wang unsigned int size) 2277be759237SJiong Wang { 2278be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 2279be759237SJiong Wang u8 dst_gpr, idx; 2280be759237SJiong Wang 2281be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 2282be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 2283be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 2284be759237SJiong Wang dst_lo = reg_both(dst_gpr); 2285be759237SJiong Wang src_lo = reg_xfer(idx); 2286be759237SJiong Wang 2287be759237SJiong Wang if (size < REG_WIDTH) { 2288be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 2289be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2290be759237SJiong Wang } else if (size == REG_WIDTH) { 2291be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2292be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2293be759237SJiong Wang } else { 2294be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 2295be759237SJiong Wang 2296be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2297be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 2298be759237SJiong Wang } 2299be759237SJiong Wang 2300be759237SJiong Wang return 0; 2301be759237SJiong Wang } 2302be759237SJiong Wang 2303be759237SJiong Wang static int 2304be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 2305be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 2306be759237SJiong Wang { 2307be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 2308be759237SJiong Wang 230991ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 2310be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 231191ff69e8SJiong Wang 231291ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 2313be759237SJiong Wang } 2314be759237SJiong Wang 23152ca71441SJakub Kicinski static int 23162ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 23172ca71441SJakub Kicinski unsigned int size) 23182ca71441SJakub Kicinski { 23199879a381SJiong Wang if (meta->ldst_gather_len) 23209879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 23219879a381SJiong Wang 23222ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2323012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 23242ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 23252ca71441SJakub Kicinski else 23262ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 23272ca71441SJakub Kicinski } 23282ca71441SJakub Kicinski 2329be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2330be759237SJiong Wang if (meta->pkt_cache.range_end) { 2331be759237SJiong Wang if (meta->pkt_cache.do_init) 2332be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2333be759237SJiong Wang 2334be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2335be759237SJiong Wang } else { 23362ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2337be759237SJiong Wang } 2338be759237SJiong Wang } 23392ca71441SJakub Kicinski 2340a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2341d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2342d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2343a82b23fbSJakub Kicinski 23443dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 23453dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 23463dd43c33SJakub Kicinski 23472ca71441SJakub Kicinski return -EOPNOTSUPP; 23482ca71441SJakub Kicinski } 23492ca71441SJakub Kicinski 23502ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23512ca71441SJakub Kicinski { 23522ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 23532ca71441SJakub Kicinski } 23542ca71441SJakub Kicinski 23552ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23562ca71441SJakub Kicinski { 23572ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 23582ca71441SJakub Kicinski } 23592ca71441SJakub Kicinski 2360d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2361d9ae7f2bSJakub Kicinski { 23622ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 23632ca71441SJakub Kicinski } 23642ca71441SJakub Kicinski 23652ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23662ca71441SJakub Kicinski { 23672ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2368d9ae7f2bSJakub Kicinski } 2369d9ae7f2bSJakub Kicinski 2370e663fe38SJakub Kicinski static int 2371e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2372e663fe38SJakub Kicinski unsigned int size) 2373d9ae7f2bSJakub Kicinski { 2374e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2375e663fe38SJakub Kicinski swreg off_reg; 2376e663fe38SJakub Kicinski 2377e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2378e663fe38SJakub Kicinski 2379e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2380e663fe38SJakub Kicinski imm, size); 2381e663fe38SJakub Kicinski } 2382e663fe38SJakub Kicinski 2383e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2384e663fe38SJakub Kicinski unsigned int size) 2385e663fe38SJakub Kicinski { 2386e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2387e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2388e663fe38SJakub Kicinski 2389d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2390d9ae7f2bSJakub Kicinski } 2391d9ae7f2bSJakub Kicinski 2392e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2393d9ae7f2bSJakub Kicinski { 2394e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2395e663fe38SJakub Kicinski } 2396e663fe38SJakub Kicinski 2397e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2398e663fe38SJakub Kicinski { 2399e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2400e663fe38SJakub Kicinski } 2401e663fe38SJakub Kicinski 2402e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2403e663fe38SJakub Kicinski { 2404e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2405e663fe38SJakub Kicinski } 2406e663fe38SJakub Kicinski 2407e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2408e663fe38SJakub Kicinski { 2409e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2410e663fe38SJakub Kicinski } 2411e663fe38SJakub Kicinski 2412e663fe38SJakub Kicinski static int 2413e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2414e663fe38SJakub Kicinski unsigned int size) 2415e663fe38SJakub Kicinski { 2416e663fe38SJakub Kicinski swreg off_reg; 2417e663fe38SJakub Kicinski 2418e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2419e663fe38SJakub Kicinski 2420e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2421e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2422e663fe38SJakub Kicinski } 2423e663fe38SJakub Kicinski 2424e663fe38SJakub Kicinski static int 2425ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2426d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2427ee9133a8SJakub Kicinski { 2428d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2429b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2430b14157eeSJakub Kicinski false, wrp_lmem_store); 2431ee9133a8SJakub Kicinski } 2432ee9133a8SJakub Kicinski 2433d985888fSJakub Kicinski static int mem_stx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2434d985888fSJakub Kicinski { 2435d985888fSJakub Kicinski switch (meta->insn.off) { 2436d985888fSJakub Kicinski case offsetof(struct xdp_md, rx_queue_index): 2437d985888fSJakub Kicinski return nfp_queue_select(nfp_prog, meta); 2438d985888fSJakub Kicinski } 2439d985888fSJakub Kicinski 2440d985888fSJakub Kicinski WARN_ON_ONCE(1); /* verifier should have rejected bad accesses */ 2441d985888fSJakub Kicinski return -EOPNOTSUPP; 2442d985888fSJakub Kicinski } 2443d985888fSJakub Kicinski 2444ee9133a8SJakub Kicinski static int 2445e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2446e663fe38SJakub Kicinski unsigned int size) 2447e663fe38SJakub Kicinski { 2448e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2449e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2450e663fe38SJakub Kicinski 2451ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2452d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2453d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2454ee9133a8SJakub Kicinski 2455d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2456d9ae7f2bSJakub Kicinski } 2457d9ae7f2bSJakub Kicinski 2458e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2459e663fe38SJakub Kicinski { 2460e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2461e663fe38SJakub Kicinski } 2462e663fe38SJakub Kicinski 2463e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2464e663fe38SJakub Kicinski { 2465e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2466e663fe38SJakub Kicinski } 2467e663fe38SJakub Kicinski 2468d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2469d9ae7f2bSJakub Kicinski { 2470d985888fSJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) 2471d985888fSJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 2472d985888fSJakub Kicinski return mem_stx_xdp(nfp_prog, meta); 2473e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2474e663fe38SJakub Kicinski } 24752ca71441SJakub Kicinski 2476e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2477e663fe38SJakub Kicinski { 2478e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2479d9ae7f2bSJakub Kicinski } 2480d9ae7f2bSJakub Kicinski 2481dcb0c27fSJakub Kicinski static int 2482dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2483dcb0c27fSJakub Kicinski { 2484dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2485dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 248641aed09cSJakub Kicinski unsigned int full_add, out; 248741aed09cSJakub Kicinski swreg addra, addrb, off; 2488dcb0c27fSJakub Kicinski 2489dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2490dcb0c27fSJakub Kicinski 249141aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 249241aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 249341aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 249441aed09cSJakub Kicinski * code for both. 249541aed09cSJakub Kicinski */ 249641aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 249741aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 249841aed09cSJakub Kicinski 249941aed09cSJakub Kicinski if (meta->insn.off) { 250041aed09cSJakub Kicinski out += 2; 250141aed09cSJakub Kicinski full_add += 2; 250241aed09cSJakub Kicinski } 250341aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 250441aed09cSJakub Kicinski out += 3; 250541aed09cSJakub Kicinski full_add += 3; 250641aed09cSJakub Kicinski } 250741aed09cSJakub Kicinski if (meta->xadd_over_16bit) 250841aed09cSJakub Kicinski out += 2 + is64; 250941aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 251041aed09cSJakub Kicinski out += 5; 251141aed09cSJakub Kicinski full_add += 5; 251241aed09cSJakub Kicinski } 251341aed09cSJakub Kicinski 251441aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 251541aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 251641aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 251741aed09cSJakub Kicinski 251841aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 251941aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 252041aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 252141aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 252241aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 252341aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 252441aed09cSJakub Kicinski /* defer for add */ 252541aed09cSJakub Kicinski } 252641aed09cSJakub Kicinski 2527dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2528dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2529dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2530dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2531dcb0c27fSJakub Kicinski } else { 2532dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2533dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2534dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2535dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2536dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2537dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2538dcb0c27fSJakub Kicinski } 2539dcb0c27fSJakub Kicinski 254041aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 254141aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 254241aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 254341aed09cSJakub Kicinski 2544dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2545dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2546dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2547dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2548dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2549dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2550b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2551dcb0c27fSJakub Kicinski 255241aed09cSJakub Kicinski if (meta->xadd_over_16bit) 255341aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 255441aed09cSJakub Kicinski } 255541aed09cSJakub Kicinski 255641aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 255741aed09cSJakub Kicinski return -EINVAL; 255841aed09cSJakub Kicinski 255941aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 256041aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 256141aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 256241aed09cSJakub Kicinski addra, addrb, is64 << 2, 256341aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 256441aed09cSJakub Kicinski 256541aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 256641aed09cSJakub Kicinski if (is64) 256741aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 256841aed09cSJakub Kicinski } 256941aed09cSJakub Kicinski 257041aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 257141aed09cSJakub Kicinski return -EINVAL; 257241aed09cSJakub Kicinski 2573dcb0c27fSJakub Kicinski return 0; 2574dcb0c27fSJakub Kicinski } 2575dcb0c27fSJakub Kicinski 2576dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2577dcb0c27fSJakub Kicinski { 2578dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2579dcb0c27fSJakub Kicinski } 2580dcb0c27fSJakub Kicinski 2581dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2582dcb0c27fSJakub Kicinski { 2583dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2584dcb0c27fSJakub Kicinski } 2585dcb0c27fSJakub Kicinski 2586d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2587d9ae7f2bSJakub Kicinski { 2588d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2589d9ae7f2bSJakub Kicinski 2590d9ae7f2bSJakub Kicinski return 0; 2591d9ae7f2bSJakub Kicinski } 2592d9ae7f2bSJakub Kicinski 2593d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2594d9ae7f2bSJakub Kicinski { 2595d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2596d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2597b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2598b3f868dfSJakub Kicinski 2599b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2600b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2601d9ae7f2bSJakub Kicinski 2602d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2603d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2604d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2605d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2606d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2607d9ae7f2bSJakub Kicinski } 2608d9ae7f2bSJakub Kicinski 2609d9ae7f2bSJakub Kicinski if (imm >> 32) { 2610d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2611d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2612d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2613d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2614d9ae7f2bSJakub Kicinski } 2615d9ae7f2bSJakub Kicinski 2616d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2617d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2618d9ae7f2bSJakub Kicinski 2619d9ae7f2bSJakub Kicinski return 0; 2620d9ae7f2bSJakub Kicinski } 2621d9ae7f2bSJakub Kicinski 2622d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2623d9ae7f2bSJakub Kicinski { 2624d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2625d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2626b3f868dfSJakub Kicinski swreg tmp_reg; 2627d9ae7f2bSJakub Kicinski 2628d9ae7f2bSJakub Kicinski if (!imm) { 2629d9ae7f2bSJakub Kicinski meta->skip = true; 2630d9ae7f2bSJakub Kicinski return 0; 2631d9ae7f2bSJakub Kicinski } 2632d9ae7f2bSJakub Kicinski 2633d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2634d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2635d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2636d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2637d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2638d9ae7f2bSJakub Kicinski } 2639d9ae7f2bSJakub Kicinski 2640d9ae7f2bSJakub Kicinski if (imm >> 32) { 2641d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2642d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2643d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2644d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2645d9ae7f2bSJakub Kicinski } 2646d9ae7f2bSJakub Kicinski 2647d9ae7f2bSJakub Kicinski return 0; 2648d9ae7f2bSJakub Kicinski } 2649d9ae7f2bSJakub Kicinski 2650d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2651d9ae7f2bSJakub Kicinski { 2652d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2653d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2654b3f868dfSJakub Kicinski swreg tmp_reg; 2655d9ae7f2bSJakub Kicinski 2656d9ae7f2bSJakub Kicinski if (!imm) { 2657d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2658d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2659d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 266082837370SJakub Kicinski return 0; 2661d9ae7f2bSJakub Kicinski } 2662d9ae7f2bSJakub Kicinski 2663d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2664d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2665d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2666d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2667d9ae7f2bSJakub Kicinski 2668d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2669d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2670d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2671d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2672d9ae7f2bSJakub Kicinski 2673d9ae7f2bSJakub Kicinski return 0; 2674d9ae7f2bSJakub Kicinski } 2675d9ae7f2bSJakub Kicinski 2676d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2677d9ae7f2bSJakub Kicinski { 2678d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2679d9ae7f2bSJakub Kicinski 2680d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 2681d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 2682d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 2683d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 2684d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2685d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 2686d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2687d9ae7f2bSJakub Kicinski 2688d9ae7f2bSJakub Kicinski return 0; 2689d9ae7f2bSJakub Kicinski } 2690d9ae7f2bSJakub Kicinski 2691d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2692d9ae7f2bSJakub Kicinski { 2693d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 2694d9ae7f2bSJakub Kicinski } 2695d9ae7f2bSJakub Kicinski 2696d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2697d9ae7f2bSJakub Kicinski { 2698d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 2699d9ae7f2bSJakub Kicinski } 2700d9ae7f2bSJakub Kicinski 27012cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 27022cb230bdSJakub Kicinski { 27032cb230bdSJakub Kicinski switch (meta->insn.imm) { 27040d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 27050d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 270677a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 270744d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 2708bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 2709fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 2710df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 2711df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 27129816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 27139816dd35SJakub Kicinski return nfp_perf_event_output(nfp_prog, meta); 27142cb230bdSJakub Kicinski default: 27152cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 27162cb230bdSJakub Kicinski return -EOPNOTSUPP; 27172cb230bdSJakub Kicinski } 27182cb230bdSJakub Kicinski } 27192cb230bdSJakub Kicinski 2720d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2721d9ae7f2bSJakub Kicinski { 2722e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 2723d9ae7f2bSJakub Kicinski 2724d9ae7f2bSJakub Kicinski return 0; 2725d9ae7f2bSJakub Kicinski } 2726d9ae7f2bSJakub Kicinski 2727d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 2728d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 2729d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 2730d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 2731d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 2732d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 2733d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 2734d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 2735d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 2736d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 2737d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 2738d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 2739d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 2740254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 2741991f5b36SJiong Wang [BPF_ALU64 | BPF_LSH | BPF_X] = shl_reg64, 2742d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 2743991f5b36SJiong Wang [BPF_ALU64 | BPF_RSH | BPF_X] = shr_reg64, 2744d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 2745d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 2746d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 2747d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 2748d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 2749d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 2750d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 2751d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 2752d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 2753d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 2754d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 2755d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 2756d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 2757254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 2758d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 27593119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 2760d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 2761d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 2762d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 2763d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 2764d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 2765d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 2766d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 27672ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 27682ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 2769d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 27702ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 2771e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 2772e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 2773d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 2774e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 2775dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 2776dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 2777e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 2778e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 2779e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 2780e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 2781d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 2782d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 278361dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = cmp_imm, 278461dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = cmp_imm, 278561dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_K] = cmp_imm, 278661dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_K] = cmp_imm, 278761dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_K] = cmp_imm, 278861dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_K] = cmp_imm, 278961dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_K] = cmp_imm, 279061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_K] = cmp_imm, 2791d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 2792d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 2793d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 279461dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = cmp_reg, 279561dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = cmp_reg, 279661dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_X] = cmp_reg, 279761dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_X] = cmp_reg, 279861dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_X] = cmp_reg, 279961dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_X] = cmp_reg, 280061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_X] = cmp_reg, 280161dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_X] = cmp_reg, 2802d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 2803d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 28042cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 2805d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 2806d9ae7f2bSJakub Kicinski }; 2807d9ae7f2bSJakub Kicinski 2808d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 2809d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 2810d9ae7f2bSJakub Kicinski { 28115b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 2812854dc87dSJiong Wang u32 idx, br_idx; 2813d9ae7f2bSJakub Kicinski 2814854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 2815d9ae7f2bSJakub Kicinski if (meta->skip) 2816d9ae7f2bSJakub Kicinski continue; 28172cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 28182cb230bdSJakub Kicinski continue; 2819d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 2820d9ae7f2bSJakub Kicinski continue; 2821d9ae7f2bSJakub Kicinski 28225b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 28232314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 28245b674140SJiong Wang else 28252314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 2826854dc87dSJiong Wang 2827d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 2828d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 2829d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 2830d9ae7f2bSJakub Kicinski return -ELOOP; 2831d9ae7f2bSJakub Kicinski } 2832d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 28332314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 28342314fe9eSJakub Kicinski RELO_BR_REL) 2835d9ae7f2bSJakub Kicinski continue; 2836d9ae7f2bSJakub Kicinski 28375b674140SJiong Wang if (!meta->jmp_dst) { 28385b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 2839d9ae7f2bSJakub Kicinski return -ELOOP; 2840d9ae7f2bSJakub Kicinski } 2841d9ae7f2bSJakub Kicinski 28425b674140SJiong Wang jmp_dst = meta->jmp_dst; 2843854dc87dSJiong Wang 28445b674140SJiong Wang if (jmp_dst->skip) { 2845d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 2846d9ae7f2bSJakub Kicinski return -ELOOP; 2847d9ae7f2bSJakub Kicinski } 2848d9ae7f2bSJakub Kicinski 28492314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 2850d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 2851d9ae7f2bSJakub Kicinski continue; 28525b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 2853d9ae7f2bSJakub Kicinski } 2854d9ae7f2bSJakub Kicinski } 2855d9ae7f2bSJakub Kicinski 2856d9ae7f2bSJakub Kicinski return 0; 2857d9ae7f2bSJakub Kicinski } 2858d9ae7f2bSJakub Kicinski 2859d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 2860d9ae7f2bSJakub Kicinski { 286118e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 286218e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 286318e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 2864d9ae7f2bSJakub Kicinski } 2865d9ae7f2bSJakub Kicinski 2866d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 2867d9ae7f2bSJakub Kicinski { 2868d9ae7f2bSJakub Kicinski /* TC direct-action mode: 2869d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 2870d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 2871d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 2872d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 2873d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 2874d9ae7f2bSJakub Kicinski * 2875d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 2876d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 2877d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 2878d9ae7f2bSJakub Kicinski * packets up the stack. 2879d9ae7f2bSJakub Kicinski */ 2880d9ae7f2bSJakub Kicinski /* Target for aborts */ 2881d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2882d9ae7f2bSJakub Kicinski 2883e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2884d9ae7f2bSJakub Kicinski 2885c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2886d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 2887d9ae7f2bSJakub Kicinski 2888d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2889d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2890d9ae7f2bSJakub Kicinski 2891d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 2892d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 2893d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2894c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2895d9ae7f2bSJakub Kicinski 2896d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 2897d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 2898d9ae7f2bSJakub Kicinski 2899d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2900d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 2901d9ae7f2bSJakub Kicinski 2902d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2903d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 2904d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2905d9ae7f2bSJakub Kicinski 2906d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2907d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2908d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 2909d9ae7f2bSJakub Kicinski 2910e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2911d9ae7f2bSJakub Kicinski 2912d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2913d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 2914d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2915d9ae7f2bSJakub Kicinski } 2916d9ae7f2bSJakub Kicinski 2917d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 2918d9ae7f2bSJakub Kicinski { 2919d9ae7f2bSJakub Kicinski /* XDP return codes: 2920d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 2921d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 2922d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 2923d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 2924d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 2925d9ae7f2bSJakub Kicinski */ 2926d9ae7f2bSJakub Kicinski /* Target for aborts */ 2927d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 2928d9ae7f2bSJakub Kicinski 2929e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2930d9ae7f2bSJakub Kicinski 2931c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2932d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 2933d9ae7f2bSJakub Kicinski 2934d9ae7f2bSJakub Kicinski /* Target for normal exits */ 2935d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 2936d9ae7f2bSJakub Kicinski 2937d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 2938d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 2939d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 2940d9ae7f2bSJakub Kicinski 2941d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 2942d9ae7f2bSJakub Kicinski 2943d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 2944d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 2945d9ae7f2bSJakub Kicinski 2946d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 2947d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 2948d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 2949d9ae7f2bSJakub Kicinski 2950e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 2951d9ae7f2bSJakub Kicinski 2952c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 2953d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 2954d9ae7f2bSJakub Kicinski } 2955d9ae7f2bSJakub Kicinski 2956d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 2957d9ae7f2bSJakub Kicinski { 2958012bb8a8SJakub Kicinski switch (nfp_prog->type) { 2959012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 2960d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 2961d9ae7f2bSJakub Kicinski break; 2962012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 2963d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 2964d9ae7f2bSJakub Kicinski break; 2965012bb8a8SJakub Kicinski default: 2966012bb8a8SJakub Kicinski WARN_ON(1); 2967d9ae7f2bSJakub Kicinski } 2968d9ae7f2bSJakub Kicinski } 2969d9ae7f2bSJakub Kicinski 2970d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 2971d9ae7f2bSJakub Kicinski { 2972d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 2973ff42bb9fSJakub Kicinski int err; 2974d9ae7f2bSJakub Kicinski 2975d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 2976d9ae7f2bSJakub Kicinski if (nfp_prog->error) 2977d9ae7f2bSJakub Kicinski return nfp_prog->error; 2978d9ae7f2bSJakub Kicinski 2979d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 2980d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 2981d9ae7f2bSJakub Kicinski 2982d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 2983d9ae7f2bSJakub Kicinski 2984d9ae7f2bSJakub Kicinski if (meta->skip) { 2985d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 2986d9ae7f2bSJakub Kicinski continue; 2987d9ae7f2bSJakub Kicinski } 2988d9ae7f2bSJakub Kicinski 2989d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 2990d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 2991d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 2992d9ae7f2bSJakub Kicinski if (!cb) 2993d9ae7f2bSJakub Kicinski return -ENOENT; 2994d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 2995d9ae7f2bSJakub Kicinski if (err) 2996d9ae7f2bSJakub Kicinski return err; 2997e8a4796eSJakub Kicinski if (nfp_prog->error) 2998e8a4796eSJakub Kicinski return nfp_prog->error; 2999d9ae7f2bSJakub Kicinski 3000d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3001d9ae7f2bSJakub Kicinski } 3002d9ae7f2bSJakub Kicinski 3003854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 3004854dc87dSJiong Wang 3005d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 3006d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3007d9ae7f2bSJakub Kicinski return nfp_prog->error; 3008d9ae7f2bSJakub Kicinski 3009ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 30101c03e03fSJakub Kicinski if (nfp_prog->error) 30111c03e03fSJakub Kicinski return nfp_prog->error; 30121c03e03fSJakub Kicinski 3013d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 3014d9ae7f2bSJakub Kicinski } 3015d9ae7f2bSJakub Kicinski 3016d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 3017d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 3018d9ae7f2bSJakub Kicinski { 3019d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3020d9ae7f2bSJakub Kicinski 3021d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3022d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 3023d9ae7f2bSJakub Kicinski 3024d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 3025d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 3026d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 3027d9ae7f2bSJakub Kicinski continue; 3028d9ae7f2bSJakub Kicinski 3029d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 3030d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 3031d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 3032d9ae7f2bSJakub Kicinski meta->skip = true; 3033d9ae7f2bSJakub Kicinski 3034d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 3035d9ae7f2bSJakub Kicinski if (!meta->skip) 3036d9ae7f2bSJakub Kicinski return; 3037d9ae7f2bSJakub Kicinski } 3038d9ae7f2bSJakub Kicinski } 3039d9ae7f2bSJakub Kicinski 30406c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 30416c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 30426c59500cSJakub Kicinski */ 30436c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 30446c59500cSJakub Kicinski { 30456c59500cSJakub Kicinski struct nfp_insn_meta *meta; 30466c59500cSJakub Kicinski 30476c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 30486c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 30496c59500cSJakub Kicinski 30506c59500cSJakub Kicinski if (meta->skip) 30516c59500cSJakub Kicinski continue; 30526c59500cSJakub Kicinski 30536c59500cSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_ALU && 30547bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_ALU64 && 30557bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_JMP) 30566c59500cSJakub Kicinski continue; 30576c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 30586c59500cSJakub Kicinski continue; 30596c59500cSJakub Kicinski if (insn.imm >= 0) 30606c59500cSJakub Kicinski continue; 30616c59500cSJakub Kicinski 30627bdc97beSJakub Kicinski if (BPF_CLASS(insn.code) == BPF_JMP) { 30637bdc97beSJakub Kicinski switch (BPF_OP(insn.code)) { 30647bdc97beSJakub Kicinski case BPF_JGE: 30657bdc97beSJakub Kicinski case BPF_JSGE: 30667bdc97beSJakub Kicinski case BPF_JLT: 30677bdc97beSJakub Kicinski case BPF_JSLT: 30687bdc97beSJakub Kicinski meta->jump_neg_op = true; 30697bdc97beSJakub Kicinski break; 30707bdc97beSJakub Kicinski default: 30717bdc97beSJakub Kicinski continue; 30727bdc97beSJakub Kicinski } 30737bdc97beSJakub Kicinski } else { 30746c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 30756c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 30766c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 30776c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 30786c59500cSJakub Kicinski else 30796c59500cSJakub Kicinski continue; 30806c59500cSJakub Kicinski 30816c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 30827bdc97beSJakub Kicinski } 30836c59500cSJakub Kicinski 30846c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 30856c59500cSJakub Kicinski } 30866c59500cSJakub Kicinski } 30876c59500cSJakub Kicinski 3088d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 3089d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 3090d9ae7f2bSJakub Kicinski { 3091d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3092d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 3093d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 3094d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 3095d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 3096d9ae7f2bSJakub Kicinski }; 3097d9ae7f2bSJakub Kicinski 3098d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3099d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 3100d9ae7f2bSJakub Kicinski 3101d9ae7f2bSJakub Kicinski insn = meta1->insn; 3102d9ae7f2bSJakub Kicinski next = meta2->insn; 3103d9ae7f2bSJakub Kicinski 3104d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3105d9ae7f2bSJakub Kicinski continue; 3106d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3107d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3108d9ae7f2bSJakub Kicinski continue; 3109d9ae7f2bSJakub Kicinski 3110d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 3111d9ae7f2bSJakub Kicinski continue; 3112d9ae7f2bSJakub Kicinski 3113d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 3114d9ae7f2bSJakub Kicinski continue; 3115d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 3116d9ae7f2bSJakub Kicinski continue; 3117d9ae7f2bSJakub Kicinski 3118d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 3119d9ae7f2bSJakub Kicinski continue; 3120d9ae7f2bSJakub Kicinski 31211266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 31221266f5d6SJiong Wang continue; 31231266f5d6SJiong Wang 3124d9ae7f2bSJakub Kicinski meta2->skip = true; 3125d9ae7f2bSJakub Kicinski } 3126d9ae7f2bSJakub Kicinski } 3127d9ae7f2bSJakub Kicinski 3128d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 3129d9ae7f2bSJakub Kicinski { 3130d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 3131d9ae7f2bSJakub Kicinski 3132d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 3133d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 3134d9ae7f2bSJakub Kicinski 3135d9ae7f2bSJakub Kicinski insn = meta1->insn; 3136d9ae7f2bSJakub Kicinski next1 = meta2->insn; 3137d9ae7f2bSJakub Kicinski next2 = meta3->insn; 3138d9ae7f2bSJakub Kicinski 3139d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3140d9ae7f2bSJakub Kicinski continue; 3141d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3142d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3143d9ae7f2bSJakub Kicinski continue; 3144d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 3145d9ae7f2bSJakub Kicinski continue; 3146d9ae7f2bSJakub Kicinski 3147d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 3148d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 3149d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 3150d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 3151d9ae7f2bSJakub Kicinski continue; 3152d9ae7f2bSJakub Kicinski 3153d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 3154d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 3155d9ae7f2bSJakub Kicinski continue; 3156d9ae7f2bSJakub Kicinski 3157d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 3158d9ae7f2bSJakub Kicinski continue; 3159d9ae7f2bSJakub Kicinski 316029fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 316129fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 316229fe46efSJiong Wang continue; 316329fe46efSJiong Wang 3164d9ae7f2bSJakub Kicinski meta2->skip = true; 3165d9ae7f2bSJakub Kicinski meta3->skip = true; 3166d9ae7f2bSJakub Kicinski } 3167d9ae7f2bSJakub Kicinski } 3168d9ae7f2bSJakub Kicinski 31696bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 31706bc7103cSJiong Wang * 31716bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 31726bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 31736bc7103cSJiong Wang * 31746bc7103cSJiong Wang * The destination register of load and source register of store should 31756bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 31766bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 31776bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 31786bc7103cSJiong Wang */ 31796bc7103cSJiong Wang static bool 31806bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 31816bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 31826bc7103cSJiong Wang { 31836bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 31846bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 31856bc7103cSJiong Wang 31866bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 31876bc7103cSJiong Wang return false; 31886bc7103cSJiong Wang 31896bc7103cSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET) 31906bc7103cSJiong Wang return false; 31916bc7103cSJiong Wang 31926bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 31936bc7103cSJiong Wang return false; 31946bc7103cSJiong Wang 31956bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 31966bc7103cSJiong Wang return false; 31976bc7103cSJiong Wang 31986bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 31996bc7103cSJiong Wang return false; 32006bc7103cSJiong Wang 32016bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 32026bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 32036bc7103cSJiong Wang return false; 32046bc7103cSJiong Wang 32056bc7103cSJiong Wang return true; 32066bc7103cSJiong Wang } 32076bc7103cSJiong Wang 32086bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 32096bc7103cSJiong Wang * 32106bc7103cSJiong Wang * - Their address base registers are the same. 32116bc7103cSJiong Wang * - Their address offsets are in the same order. 32126bc7103cSJiong Wang * - They operate at the same memory width. 32136bc7103cSJiong Wang * - There is no jump into the middle of them. 32146bc7103cSJiong Wang */ 32156bc7103cSJiong Wang static bool 32166bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 32176bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 32186bc7103cSJiong Wang struct bpf_insn *prev_ld, 32196bc7103cSJiong Wang struct bpf_insn *prev_st) 32206bc7103cSJiong Wang { 32216bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 32226bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 32236bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 32246bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 32256bc7103cSJiong Wang 32266bc7103cSJiong Wang /* This pair is the start pair. */ 32276bc7103cSJiong Wang if (!prev_ld) 32286bc7103cSJiong Wang return true; 32296bc7103cSJiong Wang 32306bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 32316bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 32326bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 32336bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 32346bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 32356bc7103cSJiong Wang prev_ld_off = prev_ld->off; 32366bc7103cSJiong Wang prev_st_off = prev_st->off; 32376bc7103cSJiong Wang 32386bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 32396bc7103cSJiong Wang return false; 32406bc7103cSJiong Wang 32416bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 32426bc7103cSJiong Wang return false; 32436bc7103cSJiong Wang 32446bc7103cSJiong Wang if (curr_size != prev_size) 32456bc7103cSJiong Wang return false; 32466bc7103cSJiong Wang 32476bc7103cSJiong Wang /* There is jump to the head of this pair. */ 32486bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 32496bc7103cSJiong Wang return false; 32506bc7103cSJiong Wang 32516bc7103cSJiong Wang /* Both in ascending order. */ 32526bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 32536bc7103cSJiong Wang prev_st_off + prev_size == st->off) 32546bc7103cSJiong Wang return true; 32556bc7103cSJiong Wang 32566bc7103cSJiong Wang /* Both in descending order. */ 32576bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 32586bc7103cSJiong Wang st->off + curr_size == prev_st_off) 32596bc7103cSJiong Wang return true; 32606bc7103cSJiong Wang 32616bc7103cSJiong Wang return false; 32626bc7103cSJiong Wang } 32636bc7103cSJiong Wang 32646bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 32656bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 32666bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 32676bc7103cSJiong Wang * as an memory copy. 32686bc7103cSJiong Wang */ 32696bc7103cSJiong Wang static bool 32706bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 32716bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 32726bc7103cSJiong Wang { 32736bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 32746bc7103cSJiong Wang 32756bc7103cSJiong Wang /* Different pointer types does not overlap. */ 32766bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 32776bc7103cSJiong Wang return false; 32786bc7103cSJiong Wang 32796bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 32806bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 32816bc7103cSJiong Wang return true; 32826bc7103cSJiong Wang 32836bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 32846bc7103cSJiong Wang * base register. 32856bc7103cSJiong Wang */ 32866bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 32876bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 32886bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 32896bc7103cSJiong Wang 32906bc7103cSJiong Wang /* Ascending order cross. */ 32916bc7103cSJiong Wang if (ld_off > head_ld_off && 32926bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 32936bc7103cSJiong Wang return true; 32946bc7103cSJiong Wang 32956bc7103cSJiong Wang /* Descending order cross. */ 32966bc7103cSJiong Wang if (ld_off < head_ld_off && 32976bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 32986bc7103cSJiong Wang return true; 32996bc7103cSJiong Wang 33006bc7103cSJiong Wang return false; 33016bc7103cSJiong Wang } 33026bc7103cSJiong Wang 33036bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 33046bc7103cSJiong Wang * 33056bc7103cSJiong Wang * load R, [regA + offA] 33066bc7103cSJiong Wang * store [regB + offB], R 33076bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 33086bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 33096bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 33106bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 33116bc7103cSJiong Wang * ... 33126bc7103cSJiong Wang * 33136bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 33146bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 33156bc7103cSJiong Wang */ 33166bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 33176bc7103cSJiong Wang { 33186bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 33196bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 33206bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 33216bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 33226bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 33236bc7103cSJiong Wang u8 count = 0; 33246bc7103cSJiong Wang 33256bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 33266bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 33276bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 33286bc7103cSJiong Wang 33296bc7103cSJiong Wang /* Reset record status if any of the following if true: 33306bc7103cSJiong Wang * - The current insn pair is not load/store. 33316bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 33326bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 33336bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 33346bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 33356bc7103cSJiong Wang * single NFP CPP command can transfer. 33366bc7103cSJiong Wang */ 33376bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 33386bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 33396bc7103cSJiong Wang prev_st) || 33406bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 33416bc7103cSJiong Wang head_st_meta) || 33426bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 33436bc7103cSJiong Wang if (!count) 33446bc7103cSJiong Wang continue; 33456bc7103cSJiong Wang 33466bc7103cSJiong Wang if (count > 1) { 33476bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 33486bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 33496bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 33506bc7103cSJiong Wang 33516bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 33526bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 33536bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 33546bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 33556bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 33566bc7103cSJiong Wang } 33576bc7103cSJiong Wang 33586bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 33596bc7103cSJiong Wang head_st_meta->skip = true; 33606bc7103cSJiong Wang } else { 33616bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 33626bc7103cSJiong Wang } 33636bc7103cSJiong Wang 33646bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 33656bc7103cSJiong Wang * could serve as the new head of the the next chain. 33666bc7103cSJiong Wang */ 33676bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 33686bc7103cSJiong Wang head_ld_meta = meta1; 33696bc7103cSJiong Wang head_st_meta = meta2; 33706bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 33716bc7103cSJiong Wang BPF_LDST_BYTES(ld); 33726bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 33736bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 33746bc7103cSJiong Wang prev_ld = ld; 33756bc7103cSJiong Wang prev_st = st; 33766bc7103cSJiong Wang count = 1; 33776bc7103cSJiong Wang } else { 33786bc7103cSJiong Wang head_ld_meta = NULL; 33796bc7103cSJiong Wang head_st_meta = NULL; 33806bc7103cSJiong Wang prev_ld = NULL; 33816bc7103cSJiong Wang prev_st = NULL; 33826bc7103cSJiong Wang count = 0; 33836bc7103cSJiong Wang } 33846bc7103cSJiong Wang 33856bc7103cSJiong Wang continue; 33866bc7103cSJiong Wang } 33876bc7103cSJiong Wang 33886bc7103cSJiong Wang if (!head_ld_meta) { 33896bc7103cSJiong Wang head_ld_meta = meta1; 33906bc7103cSJiong Wang head_st_meta = meta2; 33916bc7103cSJiong Wang } else { 33926bc7103cSJiong Wang meta1->skip = true; 33936bc7103cSJiong Wang meta2->skip = true; 33946bc7103cSJiong Wang } 33956bc7103cSJiong Wang 33966bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 33976bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 33986bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 33996bc7103cSJiong Wang prev_ld = ld; 34006bc7103cSJiong Wang prev_st = st; 34016bc7103cSJiong Wang count++; 34026bc7103cSJiong Wang } 34036bc7103cSJiong Wang } 34046bc7103cSJiong Wang 340587b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 340687b10ecdSJiong Wang { 340787b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 340887b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 340987b10ecdSJiong Wang bool cache_avail = false; 341087b10ecdSJiong Wang struct bpf_insn *insn; 341187b10ecdSJiong Wang s32 range_ptr_off = 0; 341287b10ecdSJiong Wang u32 range_ptr_id = 0; 341387b10ecdSJiong Wang 341487b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 341587b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 341687b10ecdSJiong Wang cache_avail = false; 341787b10ecdSJiong Wang 341887b10ecdSJiong Wang if (meta->skip) 341987b10ecdSJiong Wang continue; 342087b10ecdSJiong Wang 342187b10ecdSJiong Wang insn = &meta->insn; 342287b10ecdSJiong Wang 342387b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 342487b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 342587b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 342687b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 342787b10ecdSJiong Wang cache_avail = false; 342887b10ecdSJiong Wang continue; 342987b10ecdSJiong Wang } 343087b10ecdSJiong Wang 343187b10ecdSJiong Wang if (!is_mbpf_load(meta)) 343287b10ecdSJiong Wang continue; 343387b10ecdSJiong Wang 343487b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 343587b10ecdSJiong Wang cache_avail = false; 343687b10ecdSJiong Wang continue; 343787b10ecdSJiong Wang } 343887b10ecdSJiong Wang 343987b10ecdSJiong Wang if (!cache_avail) { 344087b10ecdSJiong Wang cache_avail = true; 344187b10ecdSJiong Wang if (range_node) 344287b10ecdSJiong Wang goto end_current_then_start_new; 344387b10ecdSJiong Wang goto start_new; 344487b10ecdSJiong Wang } 344587b10ecdSJiong Wang 344687b10ecdSJiong Wang /* Check ID to make sure two reads share the same 344787b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 344887b10ecdSJiong Wang * to make sure they also share the same constant 344987b10ecdSJiong Wang * offset. 345087b10ecdSJiong Wang * 345187b10ecdSJiong Wang * OFFs don't really need to be the same, because they 345287b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 345387b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 345487b10ecdSJiong Wang * offsets against original packet pointer. We don't 345587b10ecdSJiong Wang * support this. 345687b10ecdSJiong Wang */ 345787b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 345887b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 345987b10ecdSJiong Wang s16 new_start = range_start; 346087b10ecdSJiong Wang s16 end, off = insn->off; 346187b10ecdSJiong Wang s16 new_end = range_end; 346287b10ecdSJiong Wang bool changed = false; 346387b10ecdSJiong Wang 346487b10ecdSJiong Wang if (off < range_start) { 346587b10ecdSJiong Wang new_start = off; 346687b10ecdSJiong Wang changed = true; 346787b10ecdSJiong Wang } 346887b10ecdSJiong Wang 346987b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 347087b10ecdSJiong Wang if (end > range_end) { 347187b10ecdSJiong Wang new_end = end; 347287b10ecdSJiong Wang changed = true; 347387b10ecdSJiong Wang } 347487b10ecdSJiong Wang 347587b10ecdSJiong Wang if (!changed) 347687b10ecdSJiong Wang continue; 347787b10ecdSJiong Wang 347887b10ecdSJiong Wang if (new_end - new_start <= 64) { 347987b10ecdSJiong Wang /* Install new range. */ 348087b10ecdSJiong Wang range_start = new_start; 348187b10ecdSJiong Wang range_end = new_end; 348287b10ecdSJiong Wang continue; 348387b10ecdSJiong Wang } 348487b10ecdSJiong Wang } 348587b10ecdSJiong Wang 348687b10ecdSJiong Wang end_current_then_start_new: 348787b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 348887b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 348987b10ecdSJiong Wang start_new: 349087b10ecdSJiong Wang range_node = meta; 349187b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 349287b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 349387b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 349487b10ecdSJiong Wang range_start = insn->off; 349587b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 349687b10ecdSJiong Wang } 349787b10ecdSJiong Wang 349887b10ecdSJiong Wang if (range_node) { 349987b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 350087b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 350187b10ecdSJiong Wang } 350287b10ecdSJiong Wang 350387b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 350487b10ecdSJiong Wang if (meta->skip) 350587b10ecdSJiong Wang continue; 350687b10ecdSJiong Wang 350787b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 350887b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 350987b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 351087b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 351187b10ecdSJiong Wang } else { 351287b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 351387b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 351487b10ecdSJiong Wang } 351587b10ecdSJiong Wang } 351687b10ecdSJiong Wang } 351787b10ecdSJiong Wang } 351887b10ecdSJiong Wang 3519d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 3520d9ae7f2bSJakub Kicinski { 3521d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 3522d9ae7f2bSJakub Kicinski 35236c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 3524d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 3525d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 35266bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 352787b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 3528d9ae7f2bSJakub Kicinski 3529d9ae7f2bSJakub Kicinski return 0; 3530d9ae7f2bSJakub Kicinski } 3531d9ae7f2bSJakub Kicinski 3532b4264c96SJakub Kicinski static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) 3533b4264c96SJakub Kicinski { 3534b4264c96SJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3535b4264c96SJakub Kicinski struct nfp_bpf_map *nfp_map; 3536b4264c96SJakub Kicinski struct bpf_map *map; 3537b4264c96SJakub Kicinski 3538b4264c96SJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3539b4264c96SJakub Kicinski if (meta1->skip || meta2->skip) 3540b4264c96SJakub Kicinski continue; 3541b4264c96SJakub Kicinski 3542b4264c96SJakub Kicinski if (meta1->insn.code != (BPF_LD | BPF_IMM | BPF_DW) || 3543b4264c96SJakub Kicinski meta1->insn.src_reg != BPF_PSEUDO_MAP_FD) 3544b4264c96SJakub Kicinski continue; 3545b4264c96SJakub Kicinski 3546b4264c96SJakub Kicinski map = (void *)(unsigned long)((u32)meta1->insn.imm | 3547b4264c96SJakub Kicinski (u64)meta2->insn.imm << 32); 3548b4264c96SJakub Kicinski if (bpf_map_offload_neutral(map)) 3549b4264c96SJakub Kicinski continue; 3550b4264c96SJakub Kicinski nfp_map = map_to_offmap(map)->dev_priv; 3551b4264c96SJakub Kicinski 3552b4264c96SJakub Kicinski meta1->insn.imm = nfp_map->tid; 3553b4264c96SJakub Kicinski meta2->insn.imm = 0; 3554b4264c96SJakub Kicinski } 3555b4264c96SJakub Kicinski 3556b4264c96SJakub Kicinski return 0; 3557b4264c96SJakub Kicinski } 3558b4264c96SJakub Kicinski 35592314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 3560fd068ddcSJakub Kicinski { 35612314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 3562fd068ddcSJakub Kicinski int i; 3563fd068ddcSJakub Kicinski 35642314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 3565fd068ddcSJakub Kicinski int err; 3566fd068ddcSJakub Kicinski 35672314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 3568fd068ddcSJakub Kicinski if (err) 3569fd068ddcSJakub Kicinski return err; 3570fd068ddcSJakub Kicinski 35712314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 3572fd068ddcSJakub Kicinski } 3573fd068ddcSJakub Kicinski 3574fd068ddcSJakub Kicinski return 0; 3575fd068ddcSJakub Kicinski } 3576fd068ddcSJakub Kicinski 357744a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 357844a12eccSJakub Kicinski { 357944a12eccSJakub Kicinski void *prog; 358044a12eccSJakub Kicinski 358144a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 358244a12eccSJakub Kicinski if (!prog) 358344a12eccSJakub Kicinski return; 358444a12eccSJakub Kicinski 358544a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 358644a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 358744a12eccSJakub Kicinski kvfree(nfp_prog->prog); 358844a12eccSJakub Kicinski nfp_prog->prog = prog; 358944a12eccSJakub Kicinski } 359044a12eccSJakub Kicinski 3591c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3592d9ae7f2bSJakub Kicinski { 3593d9ae7f2bSJakub Kicinski int ret; 3594d9ae7f2bSJakub Kicinski 3595b4264c96SJakub Kicinski ret = nfp_bpf_replace_map_ptrs(nfp_prog); 3596b4264c96SJakub Kicinski if (ret) 3597b4264c96SJakub Kicinski return ret; 3598b4264c96SJakub Kicinski 3599d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 3600d9ae7f2bSJakub Kicinski if (ret) 36019314c442SJakub Kicinski return ret; 3602d9ae7f2bSJakub Kicinski 3603d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 3604d9ae7f2bSJakub Kicinski if (ret) { 3605d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 3606d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 36079314c442SJakub Kicinski return -EINVAL; 3608d9ae7f2bSJakub Kicinski } 3609d9ae7f2bSJakub Kicinski 361044a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 361144a12eccSJakub Kicinski 36122314fe9eSJakub Kicinski return ret; 3613d9ae7f2bSJakub Kicinski } 36141549921dSJakub Kicinski 36151549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 36161549921dSJakub Kicinski { 36171549921dSJakub Kicinski struct nfp_insn_meta *meta; 36181549921dSJakub Kicinski 36191549921dSJakub Kicinski /* Another pass to record jump information. */ 36201549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 36211549921dSJakub Kicinski u64 code = meta->insn.code; 36221549921dSJakub Kicinski 36231549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 36241549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 36251549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 36261549921dSJakub Kicinski unsigned short dst_indx; 36271549921dSJakub Kicinski 36281549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 36291549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 36301549921dSJakub Kicinski cnt); 36311549921dSJakub Kicinski 36321549921dSJakub Kicinski meta->jmp_dst = dst_meta; 36331549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 36341549921dSJakub Kicinski } 36351549921dSJakub Kicinski } 36361549921dSJakub Kicinski } 36372314fe9eSJakub Kicinski 363874801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 363974801e50SQuentin Monnet { 364074801e50SQuentin Monnet return !!instr_cb[code]; 364174801e50SQuentin Monnet } 364274801e50SQuentin Monnet 36432314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 36442314fe9eSJakub Kicinski { 36452314fe9eSJakub Kicinski unsigned int i; 36462314fe9eSJakub Kicinski u64 *prog; 36472314fe9eSJakub Kicinski int err; 36482314fe9eSJakub Kicinski 36492314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 36502314fe9eSJakub Kicinski GFP_KERNEL); 36512314fe9eSJakub Kicinski if (!prog) 36522314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 36532314fe9eSJakub Kicinski 36542314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 36552314fe9eSJakub Kicinski enum nfp_relo_type special; 365677a3d311SJakub Kicinski u32 val; 36572314fe9eSJakub Kicinski 36582314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 36592314fe9eSJakub Kicinski switch (special) { 36602314fe9eSJakub Kicinski case RELO_NONE: 36612314fe9eSJakub Kicinski continue; 36622314fe9eSJakub Kicinski case RELO_BR_REL: 36632314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 36642314fe9eSJakub Kicinski break; 36652314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 36662314fe9eSJakub Kicinski br_set_offset(&prog[i], 36672314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 36682314fe9eSJakub Kicinski break; 36692314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 36702314fe9eSJakub Kicinski br_set_offset(&prog[i], 36712314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 36722314fe9eSJakub Kicinski break; 36732314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 36742314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 36752314fe9eSJakub Kicinski break; 367677a3d311SJakub Kicinski case RELO_BR_HELPER: 367777a3d311SJakub Kicinski val = br_get_offset(prog[i]); 367877a3d311SJakub Kicinski val -= BR_OFF_RELO; 367977a3d311SJakub Kicinski switch (val) { 368077a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 368177a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 368277a3d311SJakub Kicinski break; 368344d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 368444d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 368544d65a47SJakub Kicinski break; 3686bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3687bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 3688bfee64deSJakub Kicinski break; 36899816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 36909816dd35SJakub Kicinski val = nfp_prog->bpf->helpers.perf_event_output; 36919816dd35SJakub Kicinski break; 369277a3d311SJakub Kicinski default: 369377a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 369477a3d311SJakub Kicinski val); 369577a3d311SJakub Kicinski err = -EINVAL; 369677a3d311SJakub Kicinski goto err_free_prog; 369777a3d311SJakub Kicinski } 369877a3d311SJakub Kicinski br_set_offset(&prog[i], val); 369977a3d311SJakub Kicinski break; 370077a3d311SJakub Kicinski case RELO_IMMED_REL: 370177a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 370277a3d311SJakub Kicinski break; 37032314fe9eSJakub Kicinski } 37042314fe9eSJakub Kicinski 37052314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 37062314fe9eSJakub Kicinski } 37072314fe9eSJakub Kicinski 37082314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 37092314fe9eSJakub Kicinski if (err) 37102314fe9eSJakub Kicinski goto err_free_prog; 37112314fe9eSJakub Kicinski 37122314fe9eSJakub Kicinski return prog; 37132314fe9eSJakub Kicinski 37142314fe9eSJakub Kicinski err_free_prog: 37152314fe9eSJakub Kicinski kfree(prog); 37162314fe9eSJakub Kicinski return ERR_PTR(err); 37172314fe9eSJakub Kicinski } 3718