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/bpf.h> 38d9ae7f2bSJakub Kicinski #include <linux/filter.h> 392a952b03SJiong Wang #include <linux/kernel.h> 40d9ae7f2bSJakub Kicinski #include <linux/pkt_cls.h> 412a952b03SJiong Wang #include <linux/reciprocal_div.h> 42d9ae7f2bSJakub Kicinski #include <linux/unistd.h> 43d9ae7f2bSJakub Kicinski 44d9ae7f2bSJakub Kicinski #include "main.h" 45d9ae7f2bSJakub Kicinski #include "../nfp_asm.h" 46d985888fSJakub Kicinski #include "../nfp_net_ctrl.h" 47d9ae7f2bSJakub Kicinski 48d9ae7f2bSJakub Kicinski /* --- NFP prog --- */ 49d9ae7f2bSJakub Kicinski /* Foreach "multiple" entries macros provide pos and next<n> pointers. 50d9ae7f2bSJakub Kicinski * It's safe to modify the next pointers (but not pos). 51d9ae7f2bSJakub Kicinski */ 52d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk2(nfp_prog, pos, next) \ 53d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 54d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l); \ 55d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 56d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l; \ 57d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 58d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos)) 59d9ae7f2bSJakub Kicinski 60d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk3(nfp_prog, pos, next, next2) \ 61d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 62d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l), \ 63d9ae7f2bSJakub Kicinski next2 = list_next_entry(next, l); \ 64d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 65d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l && \ 66d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next2->l; \ 67d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 68d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos), \ 69d9ae7f2bSJakub Kicinski next2 = nfp_meta_next(next)) 70d9ae7f2bSJakub Kicinski 71d9ae7f2bSJakub Kicinski static bool 72d9ae7f2bSJakub Kicinski nfp_meta_has_prev(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 73d9ae7f2bSJakub Kicinski { 74d9ae7f2bSJakub Kicinski return meta->l.prev != &nfp_prog->insns; 75d9ae7f2bSJakub Kicinski } 76d9ae7f2bSJakub Kicinski 77d9ae7f2bSJakub Kicinski static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn) 78d9ae7f2bSJakub Kicinski { 79e8a4796eSJakub Kicinski if (nfp_prog->__prog_alloc_len / sizeof(u64) == nfp_prog->prog_len) { 80e8a4796eSJakub Kicinski pr_warn("instruction limit reached (%u NFP instructions)\n", 81e8a4796eSJakub Kicinski nfp_prog->prog_len); 82d9ae7f2bSJakub Kicinski nfp_prog->error = -ENOSPC; 83d9ae7f2bSJakub Kicinski return; 84d9ae7f2bSJakub Kicinski } 85d9ae7f2bSJakub Kicinski 86d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len] = insn; 87d9ae7f2bSJakub Kicinski nfp_prog->prog_len++; 88d9ae7f2bSJakub Kicinski } 89d9ae7f2bSJakub Kicinski 90d9ae7f2bSJakub Kicinski static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) 91d9ae7f2bSJakub Kicinski { 922314fe9eSJakub Kicinski return nfp_prog->prog_len; 93d9ae7f2bSJakub Kicinski } 94d9ae7f2bSJakub Kicinski 950d49eaf4SJakub Kicinski static bool 960d49eaf4SJakub Kicinski nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off) 970d49eaf4SJakub Kicinski { 980d49eaf4SJakub Kicinski /* If there is a recorded error we may have dropped instructions; 990d49eaf4SJakub Kicinski * that doesn't have to be due to translator bug, and the translation 1000d49eaf4SJakub Kicinski * will fail anyway, so just return OK. 1010d49eaf4SJakub Kicinski */ 1020d49eaf4SJakub Kicinski if (nfp_prog->error) 1030d49eaf4SJakub Kicinski return true; 1040d49eaf4SJakub Kicinski return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off); 1050d49eaf4SJakub Kicinski } 1060d49eaf4SJakub Kicinski 107d9ae7f2bSJakub Kicinski /* --- Emitters --- */ 108d9ae7f2bSJakub Kicinski static void 109d9ae7f2bSJakub Kicinski __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 110b556ddd9SJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, enum cmd_ctx_swap ctx, 111b556ddd9SJakub Kicinski bool indir) 112d9ae7f2bSJakub Kicinski { 113d9ae7f2bSJakub Kicinski u64 insn; 114d9ae7f2bSJakub Kicinski 115d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 116d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 117d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 118d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 119d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 120d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 121b556ddd9SJakub Kicinski FIELD_PREP(OP_CMD_SIG, ctx != CMD_CTX_NO_SWAP) | 122d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 1235468a8b9SJakub Kicinski FIELD_PREP(OP_CMD_INDIR, indir) | 124d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 125d9ae7f2bSJakub Kicinski 126d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 127d9ae7f2bSJakub Kicinski } 128d9ae7f2bSJakub Kicinski 129d9ae7f2bSJakub Kicinski static void 1305468a8b9SJakub Kicinski emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 131b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx, bool indir) 132d9ae7f2bSJakub Kicinski { 133d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 134d9ae7f2bSJakub Kicinski int err; 135d9ae7f2bSJakub Kicinski 136d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 137d9ae7f2bSJakub Kicinski if (err) { 138d9ae7f2bSJakub Kicinski nfp_prog->error = err; 139d9ae7f2bSJakub Kicinski return; 140d9ae7f2bSJakub Kicinski } 141d9ae7f2bSJakub Kicinski if (reg.swap) { 142d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 143d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 144d9ae7f2bSJakub Kicinski return; 145d9ae7f2bSJakub Kicinski } 146995e101fSJakub Kicinski if (reg.dst_lmextn || reg.src_lmextn) { 147995e101fSJakub Kicinski pr_err("cmd can't use LMextn\n"); 148995e101fSJakub Kicinski nfp_prog->error = -EFAULT; 149995e101fSJakub Kicinski return; 150995e101fSJakub Kicinski } 151d9ae7f2bSJakub Kicinski 152b556ddd9SJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, ctx, 1535468a8b9SJakub Kicinski indir); 1545468a8b9SJakub Kicinski } 1555468a8b9SJakub Kicinski 1565468a8b9SJakub Kicinski static void 1575468a8b9SJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 158b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1595468a8b9SJakub Kicinski { 160b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, false); 161d9ae7f2bSJakub Kicinski } 162d9ae7f2bSJakub Kicinski 163d9ae7f2bSJakub Kicinski static void 1649879a381SJiong Wang emit_cmd_indir(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 165b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1669879a381SJiong Wang { 167b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, true); 1689879a381SJiong Wang } 1699879a381SJiong Wang 1709879a381SJiong Wang static void 171d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 172d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 173d9ae7f2bSJakub Kicinski { 174d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 175d9ae7f2bSJakub Kicinski u64 insn; 176d9ae7f2bSJakub Kicinski 177d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 178d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 179d9ae7f2bSJakub Kicinski 180d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 181d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 182d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 183d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 184d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 185d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 186d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 187d9ae7f2bSJakub Kicinski 188d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 189d9ae7f2bSJakub Kicinski } 190d9ae7f2bSJakub Kicinski 1912314fe9eSJakub Kicinski static void 1922314fe9eSJakub Kicinski emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, 1932314fe9eSJakub Kicinski enum nfp_relo_type relo) 194d9ae7f2bSJakub Kicinski { 1952314fe9eSJakub Kicinski if (mask == BR_UNC && defer > 2) { 196d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 197d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 198d9ae7f2bSJakub Kicinski return; 199d9ae7f2bSJakub Kicinski } 2002314fe9eSJakub Kicinski 2012314fe9eSJakub Kicinski __emit_br(nfp_prog, mask, 2022314fe9eSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 2032314fe9eSJakub Kicinski BR_CSS_NONE, addr, defer); 2042314fe9eSJakub Kicinski 2052314fe9eSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 2062314fe9eSJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 207d9ae7f2bSJakub Kicinski } 208d9ae7f2bSJakub Kicinski 209d9ae7f2bSJakub Kicinski static void 210d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 211d9ae7f2bSJakub Kicinski { 2122314fe9eSJakub Kicinski emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); 213d9ae7f2bSJakub Kicinski } 214d9ae7f2bSJakub Kicinski 215d9ae7f2bSJakub Kicinski static void 216991f5b36SJiong Wang __emit_br_bit(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 addr, u8 defer, 217991f5b36SJiong Wang bool set, bool src_lmextn) 218991f5b36SJiong Wang { 219991f5b36SJiong Wang u16 addr_lo, addr_hi; 220991f5b36SJiong Wang u64 insn; 221991f5b36SJiong Wang 222991f5b36SJiong Wang addr_lo = addr & (OP_BR_BIT_ADDR_LO >> __bf_shf(OP_BR_BIT_ADDR_LO)); 223991f5b36SJiong Wang addr_hi = addr != addr_lo; 224991f5b36SJiong Wang 225991f5b36SJiong Wang insn = OP_BR_BIT_BASE | 226991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_A_SRC, areg) | 227991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_B_SRC, breg) | 228991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_BV, set) | 229991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_DEFBR, defer) | 230991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_ADDR_LO, addr_lo) | 231991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_ADDR_HI, addr_hi) | 232991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_SRC_LMEXTN, src_lmextn); 233991f5b36SJiong Wang 234991f5b36SJiong Wang nfp_prog_push(nfp_prog, insn); 235991f5b36SJiong Wang } 236991f5b36SJiong Wang 237991f5b36SJiong Wang static void 238991f5b36SJiong Wang emit_br_bit_relo(struct nfp_prog *nfp_prog, swreg src, u8 bit, u16 addr, 239991f5b36SJiong Wang u8 defer, bool set, enum nfp_relo_type relo) 240991f5b36SJiong Wang { 241991f5b36SJiong Wang struct nfp_insn_re_regs reg; 242991f5b36SJiong Wang int err; 243991f5b36SJiong Wang 244991f5b36SJiong Wang /* NOTE: The bit to test is specified as an rotation amount, such that 245991f5b36SJiong Wang * the bit to test will be placed on the MSB of the result when 246991f5b36SJiong Wang * doing a rotate right. For bit X, we need right rotate X + 1. 247991f5b36SJiong Wang */ 248991f5b36SJiong Wang bit += 1; 249991f5b36SJiong Wang 250991f5b36SJiong Wang err = swreg_to_restricted(reg_none(), src, reg_imm(bit), ®, false); 251991f5b36SJiong Wang if (err) { 252991f5b36SJiong Wang nfp_prog->error = err; 253991f5b36SJiong Wang return; 254991f5b36SJiong Wang } 255991f5b36SJiong Wang 256991f5b36SJiong Wang __emit_br_bit(nfp_prog, reg.areg, reg.breg, addr, defer, set, 257991f5b36SJiong Wang reg.src_lmextn); 258991f5b36SJiong Wang 259991f5b36SJiong Wang nfp_prog->prog[nfp_prog->prog_len - 1] |= 260991f5b36SJiong Wang FIELD_PREP(OP_RELO_TYPE, relo); 261991f5b36SJiong Wang } 262991f5b36SJiong Wang 263991f5b36SJiong Wang static void 264991f5b36SJiong Wang emit_br_bset(struct nfp_prog *nfp_prog, swreg src, u8 bit, u16 addr, u8 defer) 265991f5b36SJiong Wang { 266991f5b36SJiong Wang emit_br_bit_relo(nfp_prog, src, bit, addr, defer, true, RELO_BR_REL); 267991f5b36SJiong Wang } 268991f5b36SJiong Wang 269991f5b36SJiong Wang static void 270d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 271d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 272995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 273995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 274d9ae7f2bSJakub Kicinski { 275d9ae7f2bSJakub Kicinski u64 insn; 276d9ae7f2bSJakub Kicinski 277d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 278d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 279d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 280d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 281d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 283d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 284995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 285995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 286995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 287d9ae7f2bSJakub Kicinski 288d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 289d9ae7f2bSJakub Kicinski } 290d9ae7f2bSJakub Kicinski 291d9ae7f2bSJakub Kicinski static void 292b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 293d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 294d9ae7f2bSJakub Kicinski { 295d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 296d9ae7f2bSJakub Kicinski int err; 297d9ae7f2bSJakub Kicinski 298b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 299d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 300d9ae7f2bSJakub Kicinski return; 301d9ae7f2bSJakub Kicinski } 302d9ae7f2bSJakub Kicinski 303d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 304d9ae7f2bSJakub Kicinski if (err) { 305d9ae7f2bSJakub Kicinski nfp_prog->error = err; 306d9ae7f2bSJakub Kicinski return; 307d9ae7f2bSJakub Kicinski } 308d9ae7f2bSJakub Kicinski 3093239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 3103239e7bbSJiong Wang __emit_immed(nfp_prog, 3113239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 3123239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 3133239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 314d9ae7f2bSJakub Kicinski } 315d9ae7f2bSJakub Kicinski 316d9ae7f2bSJakub Kicinski static void 317d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 318d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 319995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 320995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 321d9ae7f2bSJakub Kicinski { 322d9ae7f2bSJakub Kicinski u64 insn; 323d9ae7f2bSJakub Kicinski 324d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 325d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 326d9ae7f2bSJakub Kicinski return; 327d9ae7f2bSJakub Kicinski } 328d9ae7f2bSJakub Kicinski 329d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 330d9ae7f2bSJakub Kicinski shift = 32 - shift; 331d9ae7f2bSJakub Kicinski 332d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 333d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 334d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 335d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 336d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 337d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 338d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 339d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 340d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 341d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 342995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 343995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 344995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 345d9ae7f2bSJakub Kicinski 346d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 347d9ae7f2bSJakub Kicinski } 348d9ae7f2bSJakub Kicinski 349d9ae7f2bSJakub Kicinski static void 350b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 351b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 352d9ae7f2bSJakub Kicinski { 353d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 354d9ae7f2bSJakub Kicinski int err; 355d9ae7f2bSJakub Kicinski 356d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 357d9ae7f2bSJakub Kicinski if (err) { 358d9ae7f2bSJakub Kicinski nfp_prog->error = err; 359d9ae7f2bSJakub Kicinski return; 360d9ae7f2bSJakub Kicinski } 361d9ae7f2bSJakub Kicinski 362d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 363995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 364995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 365d9ae7f2bSJakub Kicinski } 366d9ae7f2bSJakub Kicinski 367d9ae7f2bSJakub Kicinski static void 368991f5b36SJiong Wang emit_shf_indir(struct nfp_prog *nfp_prog, swreg dst, 369991f5b36SJiong Wang swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc) 370991f5b36SJiong Wang { 371991f5b36SJiong Wang if (sc == SHF_SC_R_ROT) { 372991f5b36SJiong Wang pr_err("indirect shift is not allowed on rotation\n"); 373991f5b36SJiong Wang nfp_prog->error = -EFAULT; 374991f5b36SJiong Wang return; 375991f5b36SJiong Wang } 376991f5b36SJiong Wang 377991f5b36SJiong Wang emit_shf(nfp_prog, dst, lreg, op, rreg, sc, 0); 378991f5b36SJiong Wang } 379991f5b36SJiong Wang 380991f5b36SJiong Wang static void 381d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 382995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 383995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 384d9ae7f2bSJakub Kicinski { 385d9ae7f2bSJakub Kicinski u64 insn; 386d9ae7f2bSJakub Kicinski 387d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 388d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 389d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 390d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 391d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 392d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 393d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 394995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 395995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 396995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 397d9ae7f2bSJakub Kicinski 398d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 399d9ae7f2bSJakub Kicinski } 400d9ae7f2bSJakub Kicinski 401d9ae7f2bSJakub Kicinski static void 402b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 403b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 404d9ae7f2bSJakub Kicinski { 405d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 406d9ae7f2bSJakub Kicinski int err; 407d9ae7f2bSJakub Kicinski 408d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 409d9ae7f2bSJakub Kicinski if (err) { 410d9ae7f2bSJakub Kicinski nfp_prog->error = err; 411d9ae7f2bSJakub Kicinski return; 412d9ae7f2bSJakub Kicinski } 413d9ae7f2bSJakub Kicinski 414d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 415995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 416995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 417d9ae7f2bSJakub Kicinski } 418d9ae7f2bSJakub Kicinski 419d9ae7f2bSJakub Kicinski static void 420d3d23fdbSJiong Wang __emit_mul(struct nfp_prog *nfp_prog, enum alu_dst_ab dst_ab, u16 areg, 421d3d23fdbSJiong Wang enum mul_type type, enum mul_step step, u16 breg, bool swap, 422d3d23fdbSJiong Wang bool wr_both, bool dst_lmextn, bool src_lmextn) 423d3d23fdbSJiong Wang { 424d3d23fdbSJiong Wang u64 insn; 425d3d23fdbSJiong Wang 426d3d23fdbSJiong Wang insn = OP_MUL_BASE | 427d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_A_SRC, areg) | 428d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_B_SRC, breg) | 429d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_STEP, step) | 430d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_DST_AB, dst_ab) | 431d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_SW, swap) | 432d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_TYPE, type) | 433d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_WR_AB, wr_both) | 434d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_SRC_LMEXTN, src_lmextn) | 435d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_DST_LMEXTN, dst_lmextn); 436d3d23fdbSJiong Wang 437d3d23fdbSJiong Wang nfp_prog_push(nfp_prog, insn); 438d3d23fdbSJiong Wang } 439d3d23fdbSJiong Wang 440d3d23fdbSJiong Wang static void 441d3d23fdbSJiong Wang emit_mul(struct nfp_prog *nfp_prog, swreg lreg, enum mul_type type, 442d3d23fdbSJiong Wang enum mul_step step, swreg rreg) 443d3d23fdbSJiong Wang { 444d3d23fdbSJiong Wang struct nfp_insn_ur_regs reg; 445d3d23fdbSJiong Wang u16 areg; 446d3d23fdbSJiong Wang int err; 447d3d23fdbSJiong Wang 448d3d23fdbSJiong Wang if (type == MUL_TYPE_START && step != MUL_STEP_NONE) { 449d3d23fdbSJiong Wang nfp_prog->error = -EINVAL; 450d3d23fdbSJiong Wang return; 451d3d23fdbSJiong Wang } 452d3d23fdbSJiong Wang 453d3d23fdbSJiong Wang if (step == MUL_LAST || step == MUL_LAST_2) { 454d3d23fdbSJiong Wang /* When type is step and step Number is LAST or LAST2, left 455d3d23fdbSJiong Wang * source is used as destination. 456d3d23fdbSJiong Wang */ 457d3d23fdbSJiong Wang err = swreg_to_unrestricted(lreg, reg_none(), rreg, ®); 458d3d23fdbSJiong Wang areg = reg.dst; 459d3d23fdbSJiong Wang } else { 460d3d23fdbSJiong Wang err = swreg_to_unrestricted(reg_none(), lreg, rreg, ®); 461d3d23fdbSJiong Wang areg = reg.areg; 462d3d23fdbSJiong Wang } 463d3d23fdbSJiong Wang 464d3d23fdbSJiong Wang if (err) { 465d3d23fdbSJiong Wang nfp_prog->error = err; 466d3d23fdbSJiong Wang return; 467d3d23fdbSJiong Wang } 468d3d23fdbSJiong Wang 469d3d23fdbSJiong Wang __emit_mul(nfp_prog, reg.dst_ab, areg, type, step, reg.breg, reg.swap, 470d3d23fdbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 471d3d23fdbSJiong Wang } 472d3d23fdbSJiong Wang 473d3d23fdbSJiong Wang static void 474d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 475d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 476995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 477995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 478d9ae7f2bSJakub Kicinski { 479d9ae7f2bSJakub Kicinski u64 insn; 480d9ae7f2bSJakub Kicinski 481d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 482d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 483d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 484d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 485d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 486d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 487d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 488d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 489d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 490995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 491995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 492995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 493d9ae7f2bSJakub Kicinski 494d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 495d9ae7f2bSJakub Kicinski } 496d9ae7f2bSJakub Kicinski 497d9ae7f2bSJakub Kicinski static void 498bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 499bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 500d9ae7f2bSJakub Kicinski { 501d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 502d9ae7f2bSJakub Kicinski int err; 503d9ae7f2bSJakub Kicinski 5042de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 5052de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 506d9ae7f2bSJakub Kicinski if (err) { 507d9ae7f2bSJakub Kicinski nfp_prog->error = err; 508d9ae7f2bSJakub Kicinski return; 509d9ae7f2bSJakub Kicinski } 510d9ae7f2bSJakub Kicinski 511d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 512995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 513995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 514d9ae7f2bSJakub Kicinski } 515d9ae7f2bSJakub Kicinski 516d9ae7f2bSJakub Kicinski static void 517b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 518d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 519d9ae7f2bSJakub Kicinski { 520bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 521d9ae7f2bSJakub Kicinski } 522d9ae7f2bSJakub Kicinski 5232df03a50SJakub Kicinski static void 5242df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 5252df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 5262df03a50SJakub Kicinski { 5272df03a50SJakub Kicinski u64 insn; 5282df03a50SJakub Kicinski 5292df03a50SJakub Kicinski insn = OP_LCSR_BASE | 5302df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 5312df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 5322df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 533df4a37d8SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr / 4) | 5342df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 5352df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 5362df03a50SJakub Kicinski 5372df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 5382df03a50SJakub Kicinski } 5392df03a50SJakub Kicinski 5402df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 5412df03a50SJakub Kicinski { 5422df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 5432df03a50SJakub Kicinski int err; 5442df03a50SJakub Kicinski 5452df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 5462df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 5472df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 5482df03a50SJakub Kicinski * copy the immed to both operands. 5492df03a50SJakub Kicinski */ 5502df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 5512df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 5522df03a50SJakub Kicinski reg.breg = reg.areg; 5532df03a50SJakub Kicinski } else { 5542df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 5552df03a50SJakub Kicinski } 5562df03a50SJakub Kicinski if (err) { 5572df03a50SJakub Kicinski nfp_prog->error = err; 5582df03a50SJakub Kicinski return; 5592df03a50SJakub Kicinski } 5602df03a50SJakub Kicinski 561df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr, 5622df03a50SJakub Kicinski false, reg.src_lmextn); 5632df03a50SJakub Kicinski } 5642df03a50SJakub Kicinski 565df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 566df4a37d8SJakub Kicinski static void __emit_csr_rd(struct nfp_prog *nfp_prog, u16 addr) 567df4a37d8SJakub Kicinski { 568df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, 0, 0, false, addr, false, false); 569df4a37d8SJakub Kicinski } 570df4a37d8SJakub Kicinski 5711c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 5721c03e03fSJakub Kicinski { 5731c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 5741c03e03fSJakub Kicinski } 5751c03e03fSJakub Kicinski 576d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 577d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 578d9ae7f2bSJakub Kicinski { 579d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 580d9ae7f2bSJakub Kicinski *val = imm; 581d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 582d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 583d9ae7f2bSJakub Kicinski *val = imm >> 8; 584d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 585d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 586d9ae7f2bSJakub Kicinski *val = imm >> 16; 587d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 588d9ae7f2bSJakub Kicinski } else { 589d9ae7f2bSJakub Kicinski return false; 590d9ae7f2bSJakub Kicinski } 591d9ae7f2bSJakub Kicinski 592d9ae7f2bSJakub Kicinski return true; 593d9ae7f2bSJakub Kicinski } 594d9ae7f2bSJakub Kicinski 595b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 596d9ae7f2bSJakub Kicinski { 597d9ae7f2bSJakub Kicinski enum immed_shift shift; 598d9ae7f2bSJakub Kicinski u16 val; 599d9ae7f2bSJakub Kicinski 600d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 601d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 602d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 603d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 604d9ae7f2bSJakub Kicinski } else { 605d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 606d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 607d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 608d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 609d9ae7f2bSJakub Kicinski } 610d9ae7f2bSJakub Kicinski } 611d9ae7f2bSJakub Kicinski 61277a3d311SJakub Kicinski static void 61377a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 61477a3d311SJakub Kicinski enum nfp_relo_type relo) 61577a3d311SJakub Kicinski { 61677a3d311SJakub Kicinski if (imm > 0xffff) { 61777a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 61877a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 61977a3d311SJakub Kicinski return; 62077a3d311SJakub Kicinski } 62177a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 62277a3d311SJakub Kicinski 62377a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 62477a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 62577a3d311SJakub Kicinski } 62677a3d311SJakub Kicinski 627d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 628d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 629d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 630d9ae7f2bSJakub Kicinski */ 631b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 632d9ae7f2bSJakub Kicinski { 633d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 634d9ae7f2bSJakub Kicinski return reg_imm(imm); 635d9ae7f2bSJakub Kicinski 636d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 637d9ae7f2bSJakub Kicinski return tmp_reg; 638d9ae7f2bSJakub Kicinski } 639d9ae7f2bSJakub Kicinski 640d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 641d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 642d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 643d9ae7f2bSJakub Kicinski */ 644b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 645d9ae7f2bSJakub Kicinski { 646d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 647d9ae7f2bSJakub Kicinski return reg_imm(imm); 648d9ae7f2bSJakub Kicinski 649d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 650d9ae7f2bSJakub Kicinski return tmp_reg; 651d9ae7f2bSJakub Kicinski } 652d9ae7f2bSJakub Kicinski 653ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 654ff42bb9fSJakub Kicinski { 655ff42bb9fSJakub Kicinski while (count--) 656ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 657ff42bb9fSJakub Kicinski } 658ff42bb9fSJakub Kicinski 659c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 660c000dfb5SJakub Kicinski { 661c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 662c000dfb5SJakub Kicinski } 663c000dfb5SJakub Kicinski 664d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 665d9ae7f2bSJakub Kicinski { 666c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 667d9ae7f2bSJakub Kicinski } 668d9ae7f2bSJakub Kicinski 6699879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 6709879a381SJiong Wang * result to @dst from low end. 6719879a381SJiong Wang */ 6729879a381SJiong Wang static void 6739879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 6749879a381SJiong Wang u8 offset) 6759879a381SJiong Wang { 6769879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 6779879a381SJiong Wang u8 mask = (1 << field_len) - 1; 6789879a381SJiong Wang 6799879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 6809879a381SJiong Wang } 6819879a381SJiong Wang 68291ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 68391ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 68491ff69e8SJiong Wang */ 68591ff69e8SJiong Wang static void 68691ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 68791ff69e8SJiong Wang u8 field_len, u8 offset) 68891ff69e8SJiong Wang { 68991ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 69091ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 69191ff69e8SJiong Wang 69291ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 69391ff69e8SJiong Wang } 69491ff69e8SJiong Wang 6953dd43c33SJakub Kicinski static void 6963dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 6973dd43c33SJakub Kicinski swreg *rega, swreg *regb) 6983dd43c33SJakub Kicinski { 6993dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 7003dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 7013dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 7023dd43c33SJakub Kicinski return; 7033dd43c33SJakub Kicinski } 7043dd43c33SJakub Kicinski 7053dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 7063dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 7073dd43c33SJakub Kicinski reg_imm(0)); 7083dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 7093dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 7103dd43c33SJakub Kicinski } 7113dd43c33SJakub Kicinski 7129879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 7139879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 7149879a381SJiong Wang { 7159879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 7169879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 7179879a381SJiong Wang swreg src_base, off; 7183dd43c33SJakub Kicinski bool src_40bit_addr; 7199879a381SJiong Wang unsigned int i; 7209879a381SJiong Wang u8 xfer_num; 7219879a381SJiong Wang 7229879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 7233dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 7249879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 7259879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 7269879a381SJiong Wang 7273dd43c33SJakub Kicinski if (src_40bit_addr) 728cc0dff6dSJiong Wang addr40_offset(nfp_prog, meta->insn.src_reg * 2, off, &src_base, 7293dd43c33SJakub Kicinski &off); 7303dd43c33SJakub Kicinski 7318c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 7328c900538SJiong Wang if (len > 32) 7338c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7348c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7358c900538SJiong Wang 7369879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 7373dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 7383dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 739b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 7409879a381SJiong Wang 7419879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 7429879a381SJiong Wang for (i = 0; i < xfer_num; i++) 7439879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 7449879a381SJiong Wang 7459879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 7469879a381SJiong Wang 7479879a381SJiong Wang if (len <= 8) { 7489879a381SJiong Wang /* Use single direct_ref write8. */ 7499879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7509879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 751b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7528c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 7539879a381SJiong Wang /* Use single direct_ref write32. */ 7549879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7559879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 756b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7578c900538SJiong Wang } else if (len <= 32) { 7589879a381SJiong Wang /* Use single indirect_ref write8. */ 7599879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 7609879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 7619879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7629879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 763b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 7648c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 7658c900538SJiong Wang /* Use single indirect_ref write32. */ 7668c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7678c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7688c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7698c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 770b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 7718c900538SJiong Wang } else if (len <= 40) { 7728c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 7738c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 7748c900538SJiong Wang */ 7758c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7768c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 777b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7788c900538SJiong Wang 7798c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 7808c900538SJiong Wang imm_b(nfp_prog)); 7818c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 7828c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 783b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7848c900538SJiong Wang } else { 7858c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 7868c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 7878c900538SJiong Wang */ 7888c900538SJiong Wang u8 new_off; 7898c900538SJiong Wang 7908c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7918c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 7928c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7938c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 794b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 7958c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 7968c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 7978c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 7988c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 799b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 8009879a381SJiong Wang } 8019879a381SJiong Wang 8029879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 8039879a381SJiong Wang * before and after we do memory copy optimization. 8049879a381SJiong Wang * 8059879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 8069879a381SJiong Wang * need to make sure it is loaded with the value the same as before 8079879a381SJiong Wang * this transformation. 8089879a381SJiong Wang * 8099879a381SJiong Wang * These extra loads could be removed once we have accurate register 8109879a381SJiong Wang * usage information. 8119879a381SJiong Wang */ 8129879a381SJiong Wang if (descending_seq) 8139879a381SJiong Wang xfer_num = 0; 8149879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 8159879a381SJiong Wang xfer_num = xfer_num - 1; 8169879a381SJiong Wang else 8179879a381SJiong Wang xfer_num = xfer_num - 2; 8189879a381SJiong Wang 8199879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 8209879a381SJiong Wang case BPF_B: 8219879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8229879a381SJiong Wang reg_xfer(xfer_num), 1, 8239879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 8249879a381SJiong Wang break; 8259879a381SJiong Wang case BPF_H: 8269879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8279879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 8289879a381SJiong Wang break; 8299879a381SJiong Wang case BPF_W: 8309879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8319879a381SJiong Wang reg_xfer(0)); 8329879a381SJiong Wang break; 8339879a381SJiong Wang case BPF_DW: 8349879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8359879a381SJiong Wang reg_xfer(xfer_num)); 8369879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 8379879a381SJiong Wang reg_xfer(xfer_num + 1)); 8389879a381SJiong Wang break; 8399879a381SJiong Wang } 8409879a381SJiong Wang 8419879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 8429879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 8439879a381SJiong Wang 8449879a381SJiong Wang return 0; 8459879a381SJiong Wang } 8469879a381SJiong Wang 847d9ae7f2bSJakub Kicinski static int 8480a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 849d9ae7f2bSJakub Kicinski { 850d9ae7f2bSJakub Kicinski unsigned int i; 851d9ae7f2bSJakub Kicinski u16 shift, sz; 852d9ae7f2bSJakub Kicinski 853d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 854d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 855d9ae7f2bSJakub Kicinski */ 8560a793977SJakub Kicinski sz = max(size, 4); 857d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 858d9ae7f2bSJakub Kicinski 8590a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 860b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 8610a793977SJakub Kicinski 8620a793977SJakub Kicinski i = 0; 8630a793977SJakub Kicinski if (shift) 8640a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 8650a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 8660a793977SJakub Kicinski else 8670a793977SJakub Kicinski for (; i * 4 < size; i++) 8680a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8690a793977SJakub Kicinski 8700a793977SJakub Kicinski if (i < 2) 8710a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 8720a793977SJakub Kicinski 8730a793977SJakub Kicinski return 0; 8740a793977SJakub Kicinski } 8750a793977SJakub Kicinski 8760a793977SJakub Kicinski static int 8773dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 8783dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 8792ca71441SJakub Kicinski { 8802ca71441SJakub Kicinski unsigned int i; 8812ca71441SJakub Kicinski u8 mask, sz; 8822ca71441SJakub Kicinski 8833dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 8842ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 8852ca71441SJakub Kicinski */ 8862ca71441SJakub Kicinski sz = max(size, 4); 8872ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 8882ca71441SJakub Kicinski 8893dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 890b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 8912ca71441SJakub Kicinski 8922ca71441SJakub Kicinski i = 0; 8932ca71441SJakub Kicinski if (mask) 8942ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 8952ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 8962ca71441SJakub Kicinski else 8972ca71441SJakub Kicinski for (; i * 4 < size; i++) 8982ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8992ca71441SJakub Kicinski 9002ca71441SJakub Kicinski if (i < 2) 9012ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 9022ca71441SJakub Kicinski 9032ca71441SJakub Kicinski return 0; 9042ca71441SJakub Kicinski } 9052ca71441SJakub Kicinski 9062ca71441SJakub Kicinski static int 9073dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 9083dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 9093dd43c33SJakub Kicinski { 9103dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 9113dd43c33SJakub Kicinski size, CMD_MODE_32b); 9123dd43c33SJakub Kicinski } 9133dd43c33SJakub Kicinski 9143dd43c33SJakub Kicinski static int 9153dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 9163dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 9173dd43c33SJakub Kicinski { 9183dd43c33SJakub Kicinski swreg rega, regb; 9193dd43c33SJakub Kicinski 9203dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 9213dd43c33SJakub Kicinski 9223dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 9233dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 9243dd43c33SJakub Kicinski } 9253dd43c33SJakub Kicinski 9263dd43c33SJakub Kicinski static int 9270a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 9280a793977SJakub Kicinski { 9290a793977SJakub Kicinski swreg tmp_reg; 9300a793977SJakub Kicinski 931d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 932d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9330a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 9340a793977SJakub Kicinski 935d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 936d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 937d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 938d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 93918e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 940e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9410a793977SJakub Kicinski 942d9ae7f2bSJakub Kicinski /* Load data */ 9430a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 944d9ae7f2bSJakub Kicinski } 945d9ae7f2bSJakub Kicinski 946d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 947d9ae7f2bSJakub Kicinski { 9480a793977SJakub Kicinski swreg tmp_reg; 9490a793977SJakub Kicinski 9500a793977SJakub Kicinski /* Check packet length */ 9510a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 9520a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 953e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9540a793977SJakub Kicinski 9550a793977SJakub Kicinski /* Load data */ 9560a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9570a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 958d9ae7f2bSJakub Kicinski } 959d9ae7f2bSJakub Kicinski 960e663fe38SJakub Kicinski static int 961e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 962e663fe38SJakub Kicinski u8 src_gpr, u8 size) 963e663fe38SJakub Kicinski { 964e663fe38SJakub Kicinski unsigned int i; 965e663fe38SJakub Kicinski 966e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 967e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 968e663fe38SJakub Kicinski 969e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 970b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 971e663fe38SJakub Kicinski 972e663fe38SJakub Kicinski return 0; 973e663fe38SJakub Kicinski } 974e663fe38SJakub Kicinski 975e663fe38SJakub Kicinski static int 976e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 977e663fe38SJakub Kicinski u64 imm, u8 size) 978e663fe38SJakub Kicinski { 979e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 980e663fe38SJakub Kicinski if (size == 8) 981e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 982e663fe38SJakub Kicinski 983e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 984b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 985e663fe38SJakub Kicinski 986e663fe38SJakub Kicinski return 0; 987e663fe38SJakub Kicinski } 988e663fe38SJakub Kicinski 989ee9133a8SJakub Kicinski typedef int 990ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 9912df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9922df03a50SJakub Kicinski bool needs_inc); 993a82b23fbSJakub Kicinski 994a82b23fbSJakub Kicinski static int 995a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 9962df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 9972df03a50SJakub Kicinski bool needs_inc) 998a82b23fbSJakub Kicinski { 9992df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1000a82b23fbSJakub Kicinski u32 idx, src_byte; 1001a82b23fbSJakub Kicinski enum shf_sc sc; 1002a82b23fbSJakub Kicinski swreg reg; 1003a82b23fbSJakub Kicinski int shf; 1004a82b23fbSJakub Kicinski u8 mask; 1005a82b23fbSJakub Kicinski 1006a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 1007a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1008a82b23fbSJakub Kicinski 1009a82b23fbSJakub Kicinski idx = off / 4; 1010a82b23fbSJakub Kicinski 1011a82b23fbSJakub Kicinski /* Move the entire word */ 1012a82b23fbSJakub Kicinski if (size == 4) { 10132df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 10142df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 1015a82b23fbSJakub Kicinski return 0; 1016a82b23fbSJakub Kicinski } 1017a82b23fbSJakub Kicinski 10182df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 10192df03a50SJakub Kicinski return -EOPNOTSUPP; 10202df03a50SJakub Kicinski 1021a82b23fbSJakub Kicinski src_byte = off % 4; 1022a82b23fbSJakub Kicinski 1023a82b23fbSJakub Kicinski mask = (1 << size) - 1; 1024a82b23fbSJakub Kicinski mask <<= dst_byte; 1025a82b23fbSJakub Kicinski 1026a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1027a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1028a82b23fbSJakub Kicinski 1029a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1030a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 1031a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 1032a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 1033a82b23fbSJakub Kicinski shf = 32 - shf; 1034a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 1035a82b23fbSJakub Kicinski } else { 1036a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 1037a82b23fbSJakub Kicinski } 1038a82b23fbSJakub Kicinski 1039a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1040a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1041a82b23fbSJakub Kicinski */ 1042a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 10432df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1044a82b23fbSJakub Kicinski } else { 1045a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 10469a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 10479a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 10489a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 10499a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 10509a90c83cSJakub Kicinski */ 10519a90c83cSJakub Kicinski if (first || !new_gpr) 1052a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1053a82b23fbSJakub Kicinski } 1054a82b23fbSJakub Kicinski 1055a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 1056a82b23fbSJakub Kicinski 10572df03a50SJakub Kicinski if (should_inc) 10582df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10592df03a50SJakub Kicinski 1060a82b23fbSJakub Kicinski return 0; 1061a82b23fbSJakub Kicinski } 1062ee9133a8SJakub Kicinski 1063ee9133a8SJakub Kicinski static int 1064ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 10652df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10662df03a50SJakub Kicinski bool needs_inc) 1067ee9133a8SJakub Kicinski { 10682df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1069ee9133a8SJakub Kicinski u32 idx, dst_byte; 1070ee9133a8SJakub Kicinski enum shf_sc sc; 1071ee9133a8SJakub Kicinski swreg reg; 1072ee9133a8SJakub Kicinski int shf; 1073ee9133a8SJakub Kicinski u8 mask; 1074ee9133a8SJakub Kicinski 1075ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 1076ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1077ee9133a8SJakub Kicinski 1078ee9133a8SJakub Kicinski idx = off / 4; 1079ee9133a8SJakub Kicinski 1080ee9133a8SJakub Kicinski /* Move the entire word */ 1081ee9133a8SJakub Kicinski if (size == 4) { 10822df03a50SJakub Kicinski wrp_mov(nfp_prog, 10832df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 10842df03a50SJakub Kicinski reg_b(src)); 1085ee9133a8SJakub Kicinski return 0; 1086ee9133a8SJakub Kicinski } 1087ee9133a8SJakub Kicinski 10882df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 10892df03a50SJakub Kicinski return -EOPNOTSUPP; 10902df03a50SJakub Kicinski 1091ee9133a8SJakub Kicinski dst_byte = off % 4; 1092ee9133a8SJakub Kicinski 1093ee9133a8SJakub Kicinski mask = (1 << size) - 1; 1094ee9133a8SJakub Kicinski mask <<= dst_byte; 1095ee9133a8SJakub Kicinski 1096ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1097ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1098ee9133a8SJakub Kicinski 1099ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1100ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 1101ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 1102ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 1103ee9133a8SJakub Kicinski shf = 32 - shf; 1104ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 1105ee9133a8SJakub Kicinski } else { 1106ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 1107ee9133a8SJakub Kicinski } 1108ee9133a8SJakub Kicinski 1109ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1110ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1111ee9133a8SJakub Kicinski */ 1112ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 11132df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1114ee9133a8SJakub Kicinski } else { 1115ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 11169a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 11179a90c83cSJakub Kicinski * the middle location will be overwritten fully. 11189a90c83cSJakub Kicinski */ 11199a90c83cSJakub Kicinski if (first || last) 1120ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1121ee9133a8SJakub Kicinski } 1122ee9133a8SJakub Kicinski 1123ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 1124ee9133a8SJakub Kicinski 11259a90c83cSJakub Kicinski if (new_gpr || last) { 1126ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1127ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 11282df03a50SJakub Kicinski if (should_inc) 11292df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 11309a90c83cSJakub Kicinski } 1131ee9133a8SJakub Kicinski 1132ee9133a8SJakub Kicinski return 0; 1133ee9133a8SJakub Kicinski } 1134ee9133a8SJakub Kicinski 1135ee9133a8SJakub Kicinski static int 1136ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1137b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1138b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1139ee9133a8SJakub Kicinski { 1140d3488480SJakub Kicinski s32 off = nfp_prog->stack_depth + meta->insn.off + ptr_off; 11419a90c83cSJakub Kicinski bool first = true, last; 11422df03a50SJakub Kicinski bool needs_inc = false; 11432df03a50SJakub Kicinski swreg stack_off_reg; 1144a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1145ee9133a8SJakub Kicinski u32 gpr_byte = 0; 11462df03a50SJakub Kicinski bool lm3 = true; 1147ee9133a8SJakub Kicinski int ret; 1148ee9133a8SJakub Kicinski 1149b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1150b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1151b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1152b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1153b14157eeSJakub Kicinski */ 1154b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1155b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1156b14157eeSJakub Kicinski 1157b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1158b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1159b14157eeSJakub Kicinski 1160b14157eeSJakub Kicinski needs_inc = true; 1161b14157eeSJakub Kicinski } else if (off + size <= 64) { 11622df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 11632df03a50SJakub Kicinski lm3 = false; 11642df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 11652df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 11662df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 11672df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 11682df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 11692df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 11702df03a50SJakub Kicinski */ 11712df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 11722df03a50SJakub Kicinski stack_imm(nfp_prog)); 11732df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11742df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11752df03a50SJakub Kicinski 11762df03a50SJakub Kicinski off %= 32; 11772df03a50SJakub Kicinski } else { 11782df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 11792df03a50SJakub Kicinski stack_imm(nfp_prog)); 11802df03a50SJakub Kicinski 11812df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11822df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11832df03a50SJakub Kicinski 11842df03a50SJakub Kicinski needs_inc = true; 11852df03a50SJakub Kicinski } 11862df03a50SJakub Kicinski if (lm3) { 11872df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 11882df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 11892df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 11902df03a50SJakub Kicinski } 11912df03a50SJakub Kicinski 1192a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1193a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1194a82b23fbSJakub Kicinski 1195ee9133a8SJakub Kicinski while (size) { 1196ee9133a8SJakub Kicinski u32 slice_end; 1197ee9133a8SJakub Kicinski u8 slice_size; 1198ee9133a8SJakub Kicinski 1199ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1200ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1201ee9133a8SJakub Kicinski slice_size = slice_end - off; 1202ee9133a8SJakub Kicinski 12039a90c83cSJakub Kicinski last = slice_size == size; 12049a90c83cSJakub Kicinski 12052df03a50SJakub Kicinski if (needs_inc) 12062df03a50SJakub Kicinski off %= 4; 12072df03a50SJakub Kicinski 1208a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 12092df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1210ee9133a8SJakub Kicinski if (ret) 1211ee9133a8SJakub Kicinski return ret; 1212ee9133a8SJakub Kicinski 1213a82b23fbSJakub Kicinski prev_gpr = gpr; 12149a90c83cSJakub Kicinski first = false; 12159a90c83cSJakub Kicinski 1216ee9133a8SJakub Kicinski gpr_byte += slice_size; 1217ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1218ee9133a8SJakub Kicinski gpr_byte -= 4; 1219ee9133a8SJakub Kicinski gpr++; 1220ee9133a8SJakub Kicinski } 1221ee9133a8SJakub Kicinski 1222ee9133a8SJakub Kicinski size -= slice_size; 1223ee9133a8SJakub Kicinski off += slice_size; 1224ee9133a8SJakub Kicinski } 1225ee9133a8SJakub Kicinski 1226ee9133a8SJakub Kicinski return 0; 1227ee9133a8SJakub Kicinski } 1228ee9133a8SJakub Kicinski 1229d9ae7f2bSJakub Kicinski static void 1230d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1231d9ae7f2bSJakub Kicinski { 1232b3f868dfSJakub Kicinski swreg tmp_reg; 1233d9ae7f2bSJakub Kicinski 1234d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1235d9ae7f2bSJakub Kicinski if (!imm) 1236d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1237d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1238d9ae7f2bSJakub Kicinski return; 1239d9ae7f2bSJakub Kicinski } 1240d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1241d9ae7f2bSJakub Kicinski if (!~imm) 1242d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1243d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1244d9ae7f2bSJakub Kicinski return; 1245d9ae7f2bSJakub Kicinski } 1246d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1247d9ae7f2bSJakub Kicinski if (!~imm) 1248d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 12495d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1250d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1251d9ae7f2bSJakub Kicinski return; 1252d9ae7f2bSJakub Kicinski } 1253d9ae7f2bSJakub Kicinski 1254d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1255d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1256d9ae7f2bSJakub Kicinski } 1257d9ae7f2bSJakub Kicinski 1258d9ae7f2bSJakub Kicinski static int 1259d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1260d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1261d9ae7f2bSJakub Kicinski { 1262d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1263d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1264d9ae7f2bSJakub Kicinski 1265d9ae7f2bSJakub Kicinski if (skip) { 1266d9ae7f2bSJakub Kicinski meta->skip = true; 1267d9ae7f2bSJakub Kicinski return 0; 1268d9ae7f2bSJakub Kicinski } 1269d9ae7f2bSJakub Kicinski 1270d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1271d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1272d9ae7f2bSJakub Kicinski 1273d9ae7f2bSJakub Kicinski return 0; 1274d9ae7f2bSJakub Kicinski } 1275d9ae7f2bSJakub Kicinski 1276d9ae7f2bSJakub Kicinski static int 1277d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1278d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1279d9ae7f2bSJakub Kicinski { 1280d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1281d9ae7f2bSJakub Kicinski 1282d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1283d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1284d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1285d9ae7f2bSJakub Kicinski 1286d9ae7f2bSJakub Kicinski return 0; 1287d9ae7f2bSJakub Kicinski } 1288d9ae7f2bSJakub Kicinski 1289d9ae7f2bSJakub Kicinski static int 1290d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1291d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1292d9ae7f2bSJakub Kicinski { 1293d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1294d9ae7f2bSJakub Kicinski 1295d9ae7f2bSJakub Kicinski if (skip) { 1296d9ae7f2bSJakub Kicinski meta->skip = true; 1297d9ae7f2bSJakub Kicinski return 0; 1298d9ae7f2bSJakub Kicinski } 1299d9ae7f2bSJakub Kicinski 1300d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1301d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1302d9ae7f2bSJakub Kicinski 1303d9ae7f2bSJakub Kicinski return 0; 1304d9ae7f2bSJakub Kicinski } 1305d9ae7f2bSJakub Kicinski 1306d9ae7f2bSJakub Kicinski static int 1307d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1308d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1309d9ae7f2bSJakub Kicinski { 1310d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1311d9ae7f2bSJakub Kicinski 1312d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1313d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1314d9ae7f2bSJakub Kicinski 1315d9ae7f2bSJakub Kicinski return 0; 1316d9ae7f2bSJakub Kicinski } 1317d9ae7f2bSJakub Kicinski 1318d9ae7f2bSJakub Kicinski static void 1319d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1320d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1321d9ae7f2bSJakub Kicinski { 1322d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1323d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1324d9ae7f2bSJakub Kicinski } 1325d9ae7f2bSJakub Kicinski 1326d9ae7f2bSJakub Kicinski static int 1327d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1328d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1329d9ae7f2bSJakub Kicinski { 1330d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1331d9ae7f2bSJakub Kicinski 1332d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1333d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1334d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1335d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1336d9ae7f2bSJakub Kicinski 1337d9ae7f2bSJakub Kicinski return 0; 1338d9ae7f2bSJakub Kicinski } 1339d9ae7f2bSJakub Kicinski 134061dd8f00SJakub Kicinski static const struct jmp_code_map { 134161dd8f00SJakub Kicinski enum br_mask br_mask; 134261dd8f00SJakub Kicinski bool swap; 134361dd8f00SJakub Kicinski } jmp_code_map[] = { 134461dd8f00SJakub Kicinski [BPF_JGT >> 4] = { BR_BLO, true }, 134561dd8f00SJakub Kicinski [BPF_JGE >> 4] = { BR_BHS, false }, 134661dd8f00SJakub Kicinski [BPF_JLT >> 4] = { BR_BLO, false }, 134761dd8f00SJakub Kicinski [BPF_JLE >> 4] = { BR_BHS, true }, 134861dd8f00SJakub Kicinski [BPF_JSGT >> 4] = { BR_BLT, true }, 134961dd8f00SJakub Kicinski [BPF_JSGE >> 4] = { BR_BGE, false }, 135061dd8f00SJakub Kicinski [BPF_JSLT >> 4] = { BR_BLT, false }, 135161dd8f00SJakub Kicinski [BPF_JSLE >> 4] = { BR_BGE, true }, 135261dd8f00SJakub Kicinski }; 135361dd8f00SJakub Kicinski 135461dd8f00SJakub Kicinski static const struct jmp_code_map *nfp_jmp_code_get(struct nfp_insn_meta *meta) 135561dd8f00SJakub Kicinski { 135661dd8f00SJakub Kicinski unsigned int op; 135761dd8f00SJakub Kicinski 135861dd8f00SJakub Kicinski op = BPF_OP(meta->insn.code) >> 4; 135961dd8f00SJakub Kicinski /* br_mask of 0 is BR_BEQ which we don't use in jump code table */ 136061dd8f00SJakub Kicinski if (WARN_ONCE(op >= ARRAY_SIZE(jmp_code_map) || 136161dd8f00SJakub Kicinski !jmp_code_map[op].br_mask, 136261dd8f00SJakub Kicinski "no code found for jump instruction")) 136361dd8f00SJakub Kicinski return NULL; 136461dd8f00SJakub Kicinski 136561dd8f00SJakub Kicinski return &jmp_code_map[op]; 136661dd8f00SJakub Kicinski } 136761dd8f00SJakub Kicinski 136861dd8f00SJakub Kicinski static int cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1369d9ae7f2bSJakub Kicinski { 1370d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1371d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 137261dd8f00SJakub Kicinski const struct jmp_code_map *code; 13737bdc97beSJakub Kicinski enum alu_op alu_op, carry_op; 1374d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1375b3f868dfSJakub Kicinski swreg tmp_reg; 1376d9ae7f2bSJakub Kicinski 137761dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 137861dd8f00SJakub Kicinski if (!code) 137961dd8f00SJakub Kicinski return -EINVAL; 138061dd8f00SJakub Kicinski 13817bdc97beSJakub Kicinski alu_op = meta->jump_neg_op ? ALU_OP_ADD : ALU_OP_SUB; 13827bdc97beSJakub Kicinski carry_op = meta->jump_neg_op ? ALU_OP_ADD_C : ALU_OP_SUB_C; 13837bdc97beSJakub Kicinski 1384d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 138561dd8f00SJakub Kicinski if (!code->swap) 13867bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), alu_op, tmp_reg); 1387d9ae7f2bSJakub Kicinski else 13887bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, alu_op, reg_a(reg)); 1389d9ae7f2bSJakub Kicinski 1390d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 139161dd8f00SJakub Kicinski if (!code->swap) 1392d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 13937bdc97beSJakub Kicinski reg_a(reg + 1), carry_op, tmp_reg); 1394d9ae7f2bSJakub Kicinski else 1395d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 13967bdc97beSJakub Kicinski tmp_reg, carry_op, reg_a(reg + 1)); 1397d9ae7f2bSJakub Kicinski 139861dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1399d9ae7f2bSJakub Kicinski 1400d9ae7f2bSJakub Kicinski return 0; 1401d9ae7f2bSJakub Kicinski } 1402d9ae7f2bSJakub Kicinski 140361dd8f00SJakub Kicinski static int cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1404d9ae7f2bSJakub Kicinski { 1405d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 140661dd8f00SJakub Kicinski const struct jmp_code_map *code; 140726fa818dSJakub Kicinski u8 areg, breg; 140826fa818dSJakub Kicinski 140961dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 141061dd8f00SJakub Kicinski if (!code) 141161dd8f00SJakub Kicinski return -EINVAL; 141261dd8f00SJakub Kicinski 141326fa818dSJakub Kicinski areg = insn->dst_reg * 2; 141426fa818dSJakub Kicinski breg = insn->src_reg * 2; 1415d9ae7f2bSJakub Kicinski 141661dd8f00SJakub Kicinski if (code->swap) { 1417d9ae7f2bSJakub Kicinski areg ^= breg; 1418d9ae7f2bSJakub Kicinski breg ^= areg; 1419d9ae7f2bSJakub Kicinski areg ^= breg; 1420d9ae7f2bSJakub Kicinski } 1421d9ae7f2bSJakub Kicinski 1422d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1423d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1424d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 142561dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1426d9ae7f2bSJakub Kicinski 1427d9ae7f2bSJakub Kicinski return 0; 1428d9ae7f2bSJakub Kicinski } 1429d9ae7f2bSJakub Kicinski 14303119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 14313119d1fdSJakub Kicinski { 14323119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 14333119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 14343119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 14353119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 14363119d1fdSJakub Kicinski } 14373119d1fdSJakub Kicinski 1438d3d23fdbSJiong Wang static void 1439d3d23fdbSJiong Wang wrp_mul_u32(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1440d3d23fdbSJiong Wang swreg rreg, bool gen_high_half) 1441d3d23fdbSJiong Wang { 1442d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1443d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_1, rreg); 1444d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_2, rreg); 1445d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_3, rreg); 1446d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_4, rreg); 1447d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_32x32, MUL_LAST, reg_none()); 1448d3d23fdbSJiong Wang if (gen_high_half) 1449d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_hi, MUL_TYPE_STEP_32x32, MUL_LAST_2, 1450d3d23fdbSJiong Wang reg_none()); 1451d3d23fdbSJiong Wang else 1452d3d23fdbSJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1453d3d23fdbSJiong Wang } 1454d3d23fdbSJiong Wang 1455d3d23fdbSJiong Wang static void 1456d3d23fdbSJiong Wang wrp_mul_u16(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1457d3d23fdbSJiong Wang swreg rreg) 1458d3d23fdbSJiong Wang { 1459d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1460d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_1, rreg); 1461d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_2, rreg); 1462d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_16x16, MUL_LAST, reg_none()); 1463d3d23fdbSJiong Wang } 1464d3d23fdbSJiong Wang 1465d3d23fdbSJiong Wang static int 1466d3d23fdbSJiong Wang wrp_mul(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1467d3d23fdbSJiong Wang bool gen_high_half, bool ropnd_from_reg) 1468d3d23fdbSJiong Wang { 1469d3d23fdbSJiong Wang swreg multiplier, multiplicand, dst_hi, dst_lo; 1470d3d23fdbSJiong Wang const struct bpf_insn *insn = &meta->insn; 1471d3d23fdbSJiong Wang u32 lopnd_max, ropnd_max; 1472d3d23fdbSJiong Wang u8 dst_reg; 1473d3d23fdbSJiong Wang 1474d3d23fdbSJiong Wang dst_reg = insn->dst_reg; 1475d3d23fdbSJiong Wang multiplicand = reg_a(dst_reg * 2); 1476d3d23fdbSJiong Wang dst_hi = reg_both(dst_reg * 2 + 1); 1477d3d23fdbSJiong Wang dst_lo = reg_both(dst_reg * 2); 1478d3d23fdbSJiong Wang lopnd_max = meta->umax_dst; 1479d3d23fdbSJiong Wang if (ropnd_from_reg) { 1480d3d23fdbSJiong Wang multiplier = reg_b(insn->src_reg * 2); 1481d3d23fdbSJiong Wang ropnd_max = meta->umax_src; 1482d3d23fdbSJiong Wang } else { 1483d3d23fdbSJiong Wang u32 imm = insn->imm; 1484d3d23fdbSJiong Wang 1485d3d23fdbSJiong Wang multiplier = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1486d3d23fdbSJiong Wang ropnd_max = imm; 1487d3d23fdbSJiong Wang } 1488d3d23fdbSJiong Wang if (lopnd_max > U16_MAX || ropnd_max > U16_MAX) 1489d3d23fdbSJiong Wang wrp_mul_u32(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier, 1490d3d23fdbSJiong Wang gen_high_half); 1491d3d23fdbSJiong Wang else 1492d3d23fdbSJiong Wang wrp_mul_u16(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier); 1493d3d23fdbSJiong Wang 1494d3d23fdbSJiong Wang return 0; 1495d3d23fdbSJiong Wang } 1496d3d23fdbSJiong Wang 14972a952b03SJiong Wang static int wrp_div_imm(struct nfp_prog *nfp_prog, u8 dst, u64 imm) 14982a952b03SJiong Wang { 14992a952b03SJiong Wang swreg dst_both = reg_both(dst), dst_a = reg_a(dst), dst_b = reg_a(dst); 15009fb410a8SJiong Wang struct reciprocal_value_adv rvalue; 15019fb410a8SJiong Wang u8 pre_shift, exp; 15022a952b03SJiong Wang swreg magic; 15032a952b03SJiong Wang 15042a952b03SJiong Wang if (imm > U32_MAX) { 15052a952b03SJiong Wang wrp_immed(nfp_prog, dst_both, 0); 15062a952b03SJiong Wang return 0; 15072a952b03SJiong Wang } 15082a952b03SJiong Wang 15099fb410a8SJiong Wang /* NOTE: because we are using "reciprocal_value_adv" which doesn't 15109fb410a8SJiong Wang * support "divisor > (1u << 31)", we need to JIT separate NFP sequence 15119fb410a8SJiong Wang * to handle such case which actually equals to the result of unsigned 15129fb410a8SJiong Wang * comparison "dst >= imm" which could be calculated using the following 15139fb410a8SJiong Wang * NFP sequence: 15149fb410a8SJiong Wang * 15159fb410a8SJiong Wang * alu[--, dst, -, imm] 15169fb410a8SJiong Wang * immed[imm, 0] 15179fb410a8SJiong Wang * alu[dst, imm, +carry, 0] 15189fb410a8SJiong Wang * 15199fb410a8SJiong Wang */ 15209fb410a8SJiong Wang if (imm > 1U << 31) { 15219fb410a8SJiong Wang swreg tmp_b = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 15229fb410a8SJiong Wang 15239fb410a8SJiong Wang emit_alu(nfp_prog, reg_none(), dst_a, ALU_OP_SUB, tmp_b); 15249fb410a8SJiong Wang wrp_immed(nfp_prog, imm_a(nfp_prog), 0); 15259fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, imm_a(nfp_prog), ALU_OP_ADD_C, 15269fb410a8SJiong Wang reg_imm(0)); 15279fb410a8SJiong Wang return 0; 15289fb410a8SJiong Wang } 15299fb410a8SJiong Wang 15309fb410a8SJiong Wang rvalue = reciprocal_value_adv(imm, 32); 15319fb410a8SJiong Wang exp = rvalue.exp; 15329fb410a8SJiong Wang if (rvalue.is_wide_m && !(imm & 1)) { 15339fb410a8SJiong Wang pre_shift = fls(imm & -imm) - 1; 15349fb410a8SJiong Wang rvalue = reciprocal_value_adv(imm >> pre_shift, 32 - pre_shift); 15359fb410a8SJiong Wang } else { 15369fb410a8SJiong Wang pre_shift = 0; 15379fb410a8SJiong Wang } 15382a952b03SJiong Wang magic = ur_load_imm_any(nfp_prog, rvalue.m, imm_b(nfp_prog)); 15399fb410a8SJiong Wang if (imm == 1U << exp) { 15402a952b03SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15419fb410a8SJiong Wang SHF_SC_R_SHF, exp); 15429fb410a8SJiong Wang } else if (rvalue.is_wide_m) { 15439fb410a8SJiong Wang wrp_mul_u32(nfp_prog, imm_both(nfp_prog), reg_none(), dst_a, 15449fb410a8SJiong Wang magic, true); 15459fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, dst_a, ALU_OP_SUB, 15469fb410a8SJiong Wang imm_b(nfp_prog)); 15472a952b03SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15489fb410a8SJiong Wang SHF_SC_R_SHF, 1); 15499fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, dst_a, ALU_OP_ADD, 15509fb410a8SJiong Wang imm_b(nfp_prog)); 15519fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15529fb410a8SJiong Wang SHF_SC_R_SHF, rvalue.sh - 1); 15539fb410a8SJiong Wang } else { 15549fb410a8SJiong Wang if (pre_shift) 15559fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, 15569fb410a8SJiong Wang dst_b, SHF_SC_R_SHF, pre_shift); 15579fb410a8SJiong Wang wrp_mul_u32(nfp_prog, dst_both, reg_none(), dst_a, magic, true); 15589fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, 15599fb410a8SJiong Wang dst_b, SHF_SC_R_SHF, rvalue.sh); 15609fb410a8SJiong Wang } 15612a952b03SJiong Wang 15622a952b03SJiong Wang return 0; 15632a952b03SJiong Wang } 15642a952b03SJiong Wang 15650d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 15660d49eaf4SJakub Kicinski { 15670d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 15680d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 15690d49eaf4SJakub Kicinski u32 ret_einval, end; 15700d49eaf4SJakub Kicinski 15710d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 15720d49eaf4SJakub Kicinski 15738231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 15748231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 15758231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 15768231f844SJakub Kicinski return -EINVAL; 15778231f844SJakub Kicinski 15788231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 15798231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 15808231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 15818231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 15828231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 15838231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 15848231f844SJakub Kicinski 15858231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 15868231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 15878231f844SJakub Kicinski 15888231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 15898231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 15908231f844SJakub Kicinski */ 15918231f844SJakub Kicinski 15928231f844SJakub Kicinski return 0; 15938231f844SJakub Kicinski } 15948231f844SJakub Kicinski 15950d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 15960d49eaf4SJakub Kicinski end = ret_einval + 2; 15970d49eaf4SJakub Kicinski 15980d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 15990d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 16000d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 16010d49eaf4SJakub Kicinski 16020d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 16030d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16040d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 16050d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 16060d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16070d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 16080d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 16090d49eaf4SJakub Kicinski 16100d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 16110d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 16120d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16130d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16140d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 16150d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 16160d49eaf4SJakub Kicinski 16170d49eaf4SJakub Kicinski /* Load the ret code */ 16180d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 16190d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 16200d49eaf4SJakub Kicinski 16210d49eaf4SJakub Kicinski /* Modify the packet metadata */ 16220d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 16230d49eaf4SJakub Kicinski 16240d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 16252314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 16260d49eaf4SJakub Kicinski 16270d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 16280d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16290d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 16300d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16310d49eaf4SJakub Kicinski 16320d49eaf4SJakub Kicinski /* return -EINVAL target */ 16330d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 16340d49eaf4SJakub Kicinski return -EINVAL; 16350d49eaf4SJakub Kicinski 16360d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 16370d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 16380d49eaf4SJakub Kicinski 16390d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 16400d49eaf4SJakub Kicinski return -EINVAL; 16410d49eaf4SJakub Kicinski 16420d49eaf4SJakub Kicinski return 0; 16430d49eaf4SJakub Kicinski } 16440d49eaf4SJakub Kicinski 16450c261593SJakub Kicinski static int adjust_tail(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16460c261593SJakub Kicinski { 16470c261593SJakub Kicinski u32 ret_einval, end; 16480c261593SJakub Kicinski swreg plen, delta; 16490c261593SJakub Kicinski 16500c261593SJakub Kicinski BUILD_BUG_ON(plen_reg(nfp_prog) != reg_b(STATIC_REG_PKT_LEN)); 16510c261593SJakub Kicinski 16520c261593SJakub Kicinski plen = imm_a(nfp_prog); 16530c261593SJakub Kicinski delta = reg_a(2 * 2); 16540c261593SJakub Kicinski 16550c261593SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 9; 16560c261593SJakub Kicinski end = nfp_prog_current_offset(nfp_prog) + 11; 16570c261593SJakub Kicinski 16580c261593SJakub Kicinski /* Calculate resulting length */ 16590c261593SJakub Kicinski emit_alu(nfp_prog, plen, plen_reg(nfp_prog), ALU_OP_ADD, delta); 16600c261593SJakub Kicinski /* delta == 0 is not allowed by the kernel, add must overflow to make 16610c261593SJakub Kicinski * length smaller. 16620c261593SJakub Kicinski */ 16630c261593SJakub Kicinski emit_br(nfp_prog, BR_BCC, ret_einval, 0); 16640c261593SJakub Kicinski 16650c261593SJakub Kicinski /* if (new_len < 14) then -EINVAL */ 16660c261593SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen, ALU_OP_SUB, reg_imm(ETH_HLEN)); 16670c261593SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 16680c261593SJakub Kicinski 16690c261593SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 16700c261593SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, delta); 16710c261593SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 16720c261593SJakub Kicinski pv_len(nfp_prog), ALU_OP_ADD, delta); 16730c261593SJakub Kicinski 16740c261593SJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 16750c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 16760c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 16770c261593SJakub Kicinski 16780c261593SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 16790c261593SJakub Kicinski return -EINVAL; 16800c261593SJakub Kicinski 16810c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 16820c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 16830c261593SJakub Kicinski 16840c261593SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 16850c261593SJakub Kicinski return -EINVAL; 16860c261593SJakub Kicinski 16870c261593SJakub Kicinski return 0; 16880c261593SJakub Kicinski } 16890c261593SJakub Kicinski 169077a3d311SJakub Kicinski static int 1691fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 169277a3d311SJakub Kicinski { 169377a3d311SJakub Kicinski bool load_lm_ptr; 169477a3d311SJakub Kicinski u32 ret_tgt; 169577a3d311SJakub Kicinski s64 lm_off; 169677a3d311SJakub Kicinski 169777a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 169877a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 16992f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 17002f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 170177a3d311SJakub Kicinski 170277a3d311SJakub Kicinski /* Set LM0 to start of key */ 170377a3d311SJakub Kicinski if (load_lm_ptr) 170477a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 170544d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 170644d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 170777a3d311SJakub Kicinski 1708fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 170977a3d311SJakub Kicinski 2, RELO_BR_HELPER); 171077a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 171177a3d311SJakub Kicinski 171277a3d311SJakub Kicinski /* Load map ID into A0 */ 1713b4264c96SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), reg_a(2)); 171477a3d311SJakub Kicinski 171577a3d311SJakub Kicinski /* Load the return address into B0 */ 171677a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 171777a3d311SJakub Kicinski 171877a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 171977a3d311SJakub Kicinski return -EINVAL; 172077a3d311SJakub Kicinski 172177a3d311SJakub Kicinski /* Reset the LM0 pointer */ 172277a3d311SJakub Kicinski if (!load_lm_ptr) 172377a3d311SJakub Kicinski return 0; 172477a3d311SJakub Kicinski 172577a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 172677a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 172777a3d311SJakub Kicinski 172877a3d311SJakub Kicinski return 0; 172977a3d311SJakub Kicinski } 173077a3d311SJakub Kicinski 1731df4a37d8SJakub Kicinski static int 1732df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1733df4a37d8SJakub Kicinski { 1734df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1735df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1736df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1737df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1738df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1739df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1740df4a37d8SJakub Kicinski return 0; 1741df4a37d8SJakub Kicinski } 1742df4a37d8SJakub Kicinski 17439816dd35SJakub Kicinski static int 17449816dd35SJakub Kicinski nfp_perf_event_output(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 17459816dd35SJakub Kicinski { 17469816dd35SJakub Kicinski swreg ptr_type; 17479816dd35SJakub Kicinski u32 ret_tgt; 17489816dd35SJakub Kicinski 17499816dd35SJakub Kicinski ptr_type = ur_load_imm_any(nfp_prog, meta->arg1.type, imm_a(nfp_prog)); 17509816dd35SJakub Kicinski 17519816dd35SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 17529816dd35SJakub Kicinski 17539816dd35SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 17549816dd35SJakub Kicinski 2, RELO_BR_HELPER); 17559816dd35SJakub Kicinski 17569816dd35SJakub Kicinski /* Load ptr type into A1 */ 17579816dd35SJakub Kicinski wrp_mov(nfp_prog, reg_a(1), ptr_type); 17589816dd35SJakub Kicinski 17599816dd35SJakub Kicinski /* Load the return address into B0 */ 17609816dd35SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 17619816dd35SJakub Kicinski 17629816dd35SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 17639816dd35SJakub Kicinski return -EINVAL; 17649816dd35SJakub Kicinski 17659816dd35SJakub Kicinski return 0; 17669816dd35SJakub Kicinski } 17679816dd35SJakub Kicinski 1768d985888fSJakub Kicinski static int 1769d985888fSJakub Kicinski nfp_queue_select(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1770d985888fSJakub Kicinski { 1771d985888fSJakub Kicinski u32 jmp_tgt; 1772d985888fSJakub Kicinski 1773d985888fSJakub Kicinski jmp_tgt = nfp_prog_current_offset(nfp_prog) + 5; 1774d985888fSJakub Kicinski 1775d985888fSJakub Kicinski /* Make sure the queue id fits into FW field */ 1776d985888fSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(meta->insn.src_reg * 2), 1777d985888fSJakub Kicinski ALU_OP_AND_NOT_B, reg_imm(0xff)); 1778d985888fSJakub Kicinski emit_br(nfp_prog, BR_BEQ, jmp_tgt, 2); 1779d985888fSJakub Kicinski 1780d985888fSJakub Kicinski /* Set the 'queue selected' bit and the queue value */ 1781d985888fSJakub Kicinski emit_shf(nfp_prog, pv_qsel_set(nfp_prog), 1782d985888fSJakub Kicinski pv_qsel_set(nfp_prog), SHF_OP_OR, reg_imm(1), 1783d985888fSJakub Kicinski SHF_SC_L_SHF, PKT_VEL_QSEL_SET_BIT); 1784d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1785d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_b(meta->insn.src_reg * 2), 1786d985888fSJakub Kicinski SHF_SC_NONE, 0); 1787d985888fSJakub Kicinski /* Delay slots end here, we will jump over next instruction if queue 1788d985888fSJakub Kicinski * value fits into the field. 1789d985888fSJakub Kicinski */ 1790d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1791d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_imm(NFP_NET_RXR_MAX), 1792d985888fSJakub Kicinski SHF_SC_NONE, 0); 1793d985888fSJakub Kicinski 1794d985888fSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, jmp_tgt)) 1795d985888fSJakub Kicinski return -EINVAL; 1796d985888fSJakub Kicinski 1797d985888fSJakub Kicinski return 0; 1798d985888fSJakub Kicinski } 1799d985888fSJakub Kicinski 1800d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1801d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1802d9ae7f2bSJakub Kicinski { 1803d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1804b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1805b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1806d9ae7f2bSJakub Kicinski 1807b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1808b14157eeSJakub Kicinski swreg stack_depth_reg; 1809b14157eeSJakub Kicinski 1810b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1811b14157eeSJakub Kicinski nfp_prog->stack_depth, 1812b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1813b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1814b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1815b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1816b14157eeSJakub Kicinski } else { 1817b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1818b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1819b14157eeSJakub Kicinski } 1820d9ae7f2bSJakub Kicinski 1821d9ae7f2bSJakub Kicinski return 0; 1822d9ae7f2bSJakub Kicinski } 1823d9ae7f2bSJakub Kicinski 1824d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1825d9ae7f2bSJakub Kicinski { 1826d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1827d9ae7f2bSJakub Kicinski 1828d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1829d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1830d9ae7f2bSJakub Kicinski 1831d9ae7f2bSJakub Kicinski return 0; 1832d9ae7f2bSJakub Kicinski } 1833d9ae7f2bSJakub Kicinski 1834d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1835d9ae7f2bSJakub Kicinski { 1836d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1837d9ae7f2bSJakub Kicinski } 1838d9ae7f2bSJakub Kicinski 1839d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1840d9ae7f2bSJakub Kicinski { 1841d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1842d9ae7f2bSJakub Kicinski } 1843d9ae7f2bSJakub Kicinski 1844d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1845d9ae7f2bSJakub Kicinski { 1846d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1847d9ae7f2bSJakub Kicinski } 1848d9ae7f2bSJakub Kicinski 1849d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1850d9ae7f2bSJakub Kicinski { 1851d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1852d9ae7f2bSJakub Kicinski } 1853d9ae7f2bSJakub Kicinski 1854d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1855d9ae7f2bSJakub Kicinski { 1856d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1857d9ae7f2bSJakub Kicinski } 1858d9ae7f2bSJakub Kicinski 1859d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1860d9ae7f2bSJakub Kicinski { 1861d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1862d9ae7f2bSJakub Kicinski } 1863d9ae7f2bSJakub Kicinski 1864d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1865d9ae7f2bSJakub Kicinski { 1866d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1867d9ae7f2bSJakub Kicinski 1868d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1869d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1870d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1871d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1872d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1873d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1874d9ae7f2bSJakub Kicinski 1875d9ae7f2bSJakub Kicinski return 0; 1876d9ae7f2bSJakub Kicinski } 1877d9ae7f2bSJakub Kicinski 1878d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1879d9ae7f2bSJakub Kicinski { 1880d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1881d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1882d9ae7f2bSJakub Kicinski 1883d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1884d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1885d9ae7f2bSJakub Kicinski 1886d9ae7f2bSJakub Kicinski return 0; 1887d9ae7f2bSJakub Kicinski } 1888d9ae7f2bSJakub Kicinski 1889d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1890d9ae7f2bSJakub Kicinski { 1891d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1892d9ae7f2bSJakub Kicinski 1893d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1894d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1895d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1896d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1897d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1898d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1899d9ae7f2bSJakub Kicinski 1900d9ae7f2bSJakub Kicinski return 0; 1901d9ae7f2bSJakub Kicinski } 1902d9ae7f2bSJakub Kicinski 1903d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1904d9ae7f2bSJakub Kicinski { 1905d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1906d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1907d9ae7f2bSJakub Kicinski 1908d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1909d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1910d9ae7f2bSJakub Kicinski 1911d9ae7f2bSJakub Kicinski return 0; 1912d9ae7f2bSJakub Kicinski } 1913d9ae7f2bSJakub Kicinski 1914d3d23fdbSJiong Wang static int mul_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1915d3d23fdbSJiong Wang { 1916d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, true); 1917d3d23fdbSJiong Wang } 1918d3d23fdbSJiong Wang 1919d3d23fdbSJiong Wang static int mul_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1920d3d23fdbSJiong Wang { 1921d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, false); 1922d3d23fdbSJiong Wang } 1923d3d23fdbSJiong Wang 19242a952b03SJiong Wang static int div_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19252a952b03SJiong Wang { 19262a952b03SJiong Wang const struct bpf_insn *insn = &meta->insn; 19272a952b03SJiong Wang 19282a952b03SJiong Wang return wrp_div_imm(nfp_prog, insn->dst_reg * 2, insn->imm); 19292a952b03SJiong Wang } 19302a952b03SJiong Wang 19312a952b03SJiong Wang static int div_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19322a952b03SJiong Wang { 19332a952b03SJiong Wang /* NOTE: verifier hook has rejected cases for which verifier doesn't 19342a952b03SJiong Wang * know whether the source operand is constant or not. 19352a952b03SJiong Wang */ 19362a952b03SJiong Wang return wrp_div_imm(nfp_prog, meta->insn.dst_reg * 2, meta->umin_src); 19372a952b03SJiong Wang } 19382a952b03SJiong Wang 1939254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1940254ef4d7SJiong Wang { 1941254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1942254ef4d7SJiong Wang 1943254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1944254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1945254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1946254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1947254ef4d7SJiong Wang 1948254ef4d7SJiong Wang return 0; 1949254ef4d7SJiong Wang } 1950254ef4d7SJiong Wang 1951991f5b36SJiong Wang /* Pseudo code: 1952991f5b36SJiong Wang * if shift_amt >= 32 1953991f5b36SJiong Wang * dst_high = dst_low << shift_amt[4:0] 1954991f5b36SJiong Wang * dst_low = 0; 1955991f5b36SJiong Wang * else 1956991f5b36SJiong Wang * dst_high = (dst_high, dst_low) >> (32 - shift_amt) 1957991f5b36SJiong Wang * dst_low = dst_low << shift_amt 1958991f5b36SJiong Wang * 1959991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1960991f5b36SJiong Wang */ 1961991f5b36SJiong Wang static int __shl_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1962991f5b36SJiong Wang { 1963991f5b36SJiong Wang if (shift_amt < 32) { 1964991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), 1965991f5b36SJiong Wang SHF_OP_NONE, reg_b(dst), SHF_SC_R_DSHF, 1966991f5b36SJiong Wang 32 - shift_amt); 1967991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1968991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 1969991f5b36SJiong Wang } else if (shift_amt == 32) { 1970991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst + 1, dst); 1971991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1972991f5b36SJiong Wang } else if (shift_amt > 32) { 1973991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1974991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt - 32); 1975991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1976991f5b36SJiong Wang } 1977991f5b36SJiong Wang 1978991f5b36SJiong Wang return 0; 1979991f5b36SJiong Wang } 1980991f5b36SJiong Wang 1981d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1982d9ae7f2bSJakub Kicinski { 1983d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 19843cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1985d9ae7f2bSJakub Kicinski 1986991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, insn->imm); 1987991f5b36SJiong Wang } 1988991f5b36SJiong Wang 1989991f5b36SJiong Wang static void shl_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1990991f5b36SJiong Wang { 1991991f5b36SJiong Wang emit_alu(nfp_prog, imm_both(nfp_prog), reg_imm(32), ALU_OP_SUB, 1992991f5b36SJiong Wang reg_b(src)); 1993991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, reg_imm(0)); 1994991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), SHF_OP_NONE, 1995991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 1996991f5b36SJiong Wang } 1997991f5b36SJiong Wang 1998991f5b36SJiong Wang /* NOTE: for indirect left shift, HIGH part should be calculated first. */ 1999991f5b36SJiong Wang static void shl_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2000991f5b36SJiong Wang { 2001991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2002991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2003991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 2004991f5b36SJiong Wang } 2005991f5b36SJiong Wang 2006991f5b36SJiong Wang static void shl_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2007991f5b36SJiong Wang { 2008991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 2009991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2010991f5b36SJiong Wang } 2011991f5b36SJiong Wang 2012991f5b36SJiong Wang static void shl_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2013991f5b36SJiong Wang { 2014991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2015991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2016991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 20173cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 2018991f5b36SJiong Wang } 2019991f5b36SJiong Wang 2020991f5b36SJiong Wang static int shl_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2021991f5b36SJiong Wang { 2022991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2023991f5b36SJiong Wang u64 umin, umax; 2024991f5b36SJiong Wang u8 dst, src; 2025991f5b36SJiong Wang 2026991f5b36SJiong Wang dst = insn->dst_reg * 2; 2027662c5472SJiong Wang umin = meta->umin_src; 2028662c5472SJiong Wang umax = meta->umax_src; 2029991f5b36SJiong Wang if (umin == umax) 2030991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, umin); 2031991f5b36SJiong Wang 2032991f5b36SJiong Wang src = insn->src_reg * 2; 2033991f5b36SJiong Wang if (umax < 32) { 2034991f5b36SJiong Wang shl_reg64_lt32(nfp_prog, dst, src); 2035991f5b36SJiong Wang } else if (umin >= 32) { 2036991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 2037991f5b36SJiong Wang } else { 2038991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2039991f5b36SJiong Wang * value of shift amount. 2040991f5b36SJiong Wang */ 2041991f5b36SJiong Wang u16 label_ge32, label_end; 2042991f5b36SJiong Wang 2043991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 7; 2044991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2045991f5b36SJiong Wang 2046991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 2047991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2048991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2049991f5b36SJiong Wang /* shl_reg64_lt32_low packed in delay slot. */ 2050991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2051991f5b36SJiong Wang 2052991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2053991f5b36SJiong Wang return -EINVAL; 2054991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 2055991f5b36SJiong Wang 2056991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2057991f5b36SJiong Wang return -EINVAL; 2058991f5b36SJiong Wang } 2059991f5b36SJiong Wang 2060991f5b36SJiong Wang return 0; 2061991f5b36SJiong Wang } 2062991f5b36SJiong Wang 2063991f5b36SJiong Wang /* Pseudo code: 2064991f5b36SJiong Wang * if shift_amt >= 32 2065991f5b36SJiong Wang * dst_high = 0; 2066991f5b36SJiong Wang * dst_low = dst_high >> shift_amt[4:0] 2067991f5b36SJiong Wang * else 2068991f5b36SJiong Wang * dst_high = dst_high >> shift_amt 2069991f5b36SJiong Wang * dst_low = (dst_high, dst_low) >> shift_amt 2070991f5b36SJiong Wang * 2071991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 2072991f5b36SJiong Wang */ 2073991f5b36SJiong Wang static int __shr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2074991f5b36SJiong Wang { 2075991f5b36SJiong Wang if (shift_amt < 32) { 2076991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2077991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2078991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2079991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2080991f5b36SJiong Wang } else if (shift_amt == 32) { 2081991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2082991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2083991f5b36SJiong Wang } else if (shift_amt > 32) { 2084991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2085991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2086991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 20873cae1319SJakub Kicinski } 2088d9ae7f2bSJakub Kicinski 2089d9ae7f2bSJakub Kicinski return 0; 2090d9ae7f2bSJakub Kicinski } 2091d9ae7f2bSJakub Kicinski 2092d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2093d9ae7f2bSJakub Kicinski { 2094d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 20953cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 2096d9ae7f2bSJakub Kicinski 2097991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, insn->imm); 2098991f5b36SJiong Wang } 2099991f5b36SJiong Wang 2100991f5b36SJiong Wang /* NOTE: for indirect right shift, LOW part should be calculated first. */ 2101991f5b36SJiong Wang static void shr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2102991f5b36SJiong Wang { 2103991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2104991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2105991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2106991f5b36SJiong Wang } 2107991f5b36SJiong Wang 2108991f5b36SJiong Wang static void shr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2109991f5b36SJiong Wang { 2110991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2111991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2112991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 2113991f5b36SJiong Wang } 2114991f5b36SJiong Wang 2115991f5b36SJiong Wang static void shr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2116991f5b36SJiong Wang { 2117991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2118991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2119991f5b36SJiong Wang } 2120991f5b36SJiong Wang 2121991f5b36SJiong Wang static void shr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2122991f5b36SJiong Wang { 2123991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2124991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2125991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 21263cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2127991f5b36SJiong Wang } 2128991f5b36SJiong Wang 2129991f5b36SJiong Wang static int shr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2130991f5b36SJiong Wang { 2131991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2132991f5b36SJiong Wang u64 umin, umax; 2133991f5b36SJiong Wang u8 dst, src; 2134991f5b36SJiong Wang 2135991f5b36SJiong Wang dst = insn->dst_reg * 2; 2136662c5472SJiong Wang umin = meta->umin_src; 2137662c5472SJiong Wang umax = meta->umax_src; 2138991f5b36SJiong Wang if (umin == umax) 2139991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, umin); 2140991f5b36SJiong Wang 2141991f5b36SJiong Wang src = insn->src_reg * 2; 2142991f5b36SJiong Wang if (umax < 32) { 2143991f5b36SJiong Wang shr_reg64_lt32(nfp_prog, dst, src); 2144991f5b36SJiong Wang } else if (umin >= 32) { 2145991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2146991f5b36SJiong Wang } else { 2147991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2148991f5b36SJiong Wang * value of shift amount. 2149991f5b36SJiong Wang */ 2150991f5b36SJiong Wang u16 label_ge32, label_end; 2151991f5b36SJiong Wang 2152991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2153991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2154991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2155991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2156991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2157991f5b36SJiong Wang /* shr_reg64_lt32_high packed in delay slot. */ 2158991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2159991f5b36SJiong Wang 2160991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2161991f5b36SJiong Wang return -EINVAL; 2162991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2163991f5b36SJiong Wang 2164991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2165991f5b36SJiong Wang return -EINVAL; 21663cae1319SJakub Kicinski } 2167d9ae7f2bSJakub Kicinski 2168d9ae7f2bSJakub Kicinski return 0; 2169d9ae7f2bSJakub Kicinski } 2170d9ae7f2bSJakub Kicinski 2171f43d0f17SJiong Wang /* Code logic is the same as __shr_imm64 except ashr requires signedness bit 2172f43d0f17SJiong Wang * told through PREV_ALU result. 2173f43d0f17SJiong Wang */ 2174c217abccSJiong Wang static int __ashr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2175c217abccSJiong Wang { 2176c217abccSJiong Wang if (shift_amt < 32) { 2177c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2178c217abccSJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2179c217abccSJiong Wang /* Set signedness bit. */ 2180c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2181c217abccSJiong Wang reg_imm(0)); 2182c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2183c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2184c217abccSJiong Wang } else if (shift_amt == 32) { 2185c217abccSJiong Wang /* NOTE: this also helps setting signedness bit. */ 2186c217abccSJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2187c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2188c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2189c217abccSJiong Wang } else if (shift_amt > 32) { 2190c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2191c217abccSJiong Wang reg_imm(0)); 2192c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2193c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2194c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2195c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2196c217abccSJiong Wang } 2197c217abccSJiong Wang 2198c217abccSJiong Wang return 0; 2199c217abccSJiong Wang } 2200c217abccSJiong Wang 2201f43d0f17SJiong Wang static int ashr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2202f43d0f17SJiong Wang { 2203f43d0f17SJiong Wang const struct bpf_insn *insn = &meta->insn; 2204f43d0f17SJiong Wang u8 dst = insn->dst_reg * 2; 2205f43d0f17SJiong Wang 2206c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, insn->imm); 2207c217abccSJiong Wang } 2208c217abccSJiong Wang 2209c217abccSJiong Wang static void ashr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2210c217abccSJiong Wang { 2211c217abccSJiong Wang /* NOTE: the first insn will set both indirect shift amount (source A) 2212c217abccSJiong Wang * and signedness bit (MSB of result). 2213c217abccSJiong Wang */ 2214c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2215c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2216c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2217c217abccSJiong Wang } 2218c217abccSJiong Wang 2219c217abccSJiong Wang static void ashr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2220c217abccSJiong Wang { 2221c217abccSJiong Wang /* NOTE: it is the same as logic shift because we don't need to shift in 2222c217abccSJiong Wang * signedness bit when the shift amount is less than 32. 2223c217abccSJiong Wang */ 2224c217abccSJiong Wang return shr_reg64_lt32_low(nfp_prog, dst, src); 2225c217abccSJiong Wang } 2226c217abccSJiong Wang 2227c217abccSJiong Wang static void ashr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2228c217abccSJiong Wang { 2229c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2230c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2231c217abccSJiong Wang } 2232c217abccSJiong Wang 2233c217abccSJiong Wang static void ashr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2234c217abccSJiong Wang { 2235c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2236c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2237c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2238f43d0f17SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2239f43d0f17SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2240c217abccSJiong Wang } 2241c217abccSJiong Wang 2242c217abccSJiong Wang /* Like ashr_imm64, but need to use indirect shift. */ 2243c217abccSJiong Wang static int ashr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2244c217abccSJiong Wang { 2245c217abccSJiong Wang const struct bpf_insn *insn = &meta->insn; 2246c217abccSJiong Wang u64 umin, umax; 2247c217abccSJiong Wang u8 dst, src; 2248c217abccSJiong Wang 2249c217abccSJiong Wang dst = insn->dst_reg * 2; 2250662c5472SJiong Wang umin = meta->umin_src; 2251662c5472SJiong Wang umax = meta->umax_src; 2252c217abccSJiong Wang if (umin == umax) 2253c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, umin); 2254c217abccSJiong Wang 2255c217abccSJiong Wang src = insn->src_reg * 2; 2256c217abccSJiong Wang if (umax < 32) { 2257c217abccSJiong Wang ashr_reg64_lt32(nfp_prog, dst, src); 2258c217abccSJiong Wang } else if (umin >= 32) { 2259c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2260c217abccSJiong Wang } else { 2261c217abccSJiong Wang u16 label_ge32, label_end; 2262c217abccSJiong Wang 2263c217abccSJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2264c217abccSJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2265c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2266c217abccSJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2267c217abccSJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2268c217abccSJiong Wang /* ashr_reg64_lt32_high packed in delay slot. */ 2269c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2270c217abccSJiong Wang 2271c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2272c217abccSJiong Wang return -EINVAL; 2273c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2274c217abccSJiong Wang 2275c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2276c217abccSJiong Wang return -EINVAL; 2277f43d0f17SJiong Wang } 2278f43d0f17SJiong Wang 2279f43d0f17SJiong Wang return 0; 2280f43d0f17SJiong Wang } 2281f43d0f17SJiong Wang 2282d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2283d9ae7f2bSJakub Kicinski { 2284d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2285d9ae7f2bSJakub Kicinski 2286d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 2287d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2288d9ae7f2bSJakub Kicinski 2289d9ae7f2bSJakub Kicinski return 0; 2290d9ae7f2bSJakub Kicinski } 2291d9ae7f2bSJakub Kicinski 2292d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2293d9ae7f2bSJakub Kicinski { 2294d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2295d9ae7f2bSJakub Kicinski 2296d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 2297d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2298d9ae7f2bSJakub Kicinski 2299d9ae7f2bSJakub Kicinski return 0; 2300d9ae7f2bSJakub Kicinski } 2301d9ae7f2bSJakub Kicinski 2302d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2303d9ae7f2bSJakub Kicinski { 2304d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 2305d9ae7f2bSJakub Kicinski } 2306d9ae7f2bSJakub Kicinski 2307d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2308d9ae7f2bSJakub Kicinski { 2309d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 2310d9ae7f2bSJakub Kicinski } 2311d9ae7f2bSJakub Kicinski 2312d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2313d9ae7f2bSJakub Kicinski { 2314d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 2315d9ae7f2bSJakub Kicinski } 2316d9ae7f2bSJakub Kicinski 2317d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2318d9ae7f2bSJakub Kicinski { 2319d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 2320d9ae7f2bSJakub Kicinski } 2321d9ae7f2bSJakub Kicinski 2322d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2323d9ae7f2bSJakub Kicinski { 2324d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 2325d9ae7f2bSJakub Kicinski } 2326d9ae7f2bSJakub Kicinski 2327d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2328d9ae7f2bSJakub Kicinski { 2329d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 2330d9ae7f2bSJakub Kicinski } 2331d9ae7f2bSJakub Kicinski 2332d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2333d9ae7f2bSJakub Kicinski { 2334d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 2335d9ae7f2bSJakub Kicinski } 2336d9ae7f2bSJakub Kicinski 2337d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2338d9ae7f2bSJakub Kicinski { 2339d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 2340d9ae7f2bSJakub Kicinski } 2341d9ae7f2bSJakub Kicinski 2342d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2343d9ae7f2bSJakub Kicinski { 2344d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 2345d9ae7f2bSJakub Kicinski } 2346d9ae7f2bSJakub Kicinski 2347d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2348d9ae7f2bSJakub Kicinski { 2349d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 2350d9ae7f2bSJakub Kicinski } 2351d9ae7f2bSJakub Kicinski 2352d3d23fdbSJiong Wang static int mul_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2353d3d23fdbSJiong Wang { 2354d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, true); 2355d3d23fdbSJiong Wang } 2356d3d23fdbSJiong Wang 2357d3d23fdbSJiong Wang static int mul_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2358d3d23fdbSJiong Wang { 2359d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, false); 2360d3d23fdbSJiong Wang } 2361d3d23fdbSJiong Wang 23622a952b03SJiong Wang static int div_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23632a952b03SJiong Wang { 23642a952b03SJiong Wang return div_reg64(nfp_prog, meta); 23652a952b03SJiong Wang } 23662a952b03SJiong Wang 23672a952b03SJiong Wang static int div_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23682a952b03SJiong Wang { 23692a952b03SJiong Wang return div_imm64(nfp_prog, meta); 23702a952b03SJiong Wang } 23712a952b03SJiong Wang 2372254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2373254ef4d7SJiong Wang { 2374254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 2375254ef4d7SJiong Wang 2376254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 2377254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2378254ef4d7SJiong Wang 2379254ef4d7SJiong Wang return 0; 2380254ef4d7SJiong Wang } 2381254ef4d7SJiong Wang 2382d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2383d9ae7f2bSJakub Kicinski { 2384d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2385d9ae7f2bSJakub Kicinski 2386d9ae7f2bSJakub Kicinski if (!insn->imm) 2387d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 2388d9ae7f2bSJakub Kicinski 2389d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 2390d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 2391d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 2392d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2393d9ae7f2bSJakub Kicinski 2394d9ae7f2bSJakub Kicinski return 0; 2395d9ae7f2bSJakub Kicinski } 2396d9ae7f2bSJakub Kicinski 23973119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23983119d1fdSJakub Kicinski { 23993119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 24003119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 24013119d1fdSJakub Kicinski 24023119d1fdSJakub Kicinski switch (insn->imm) { 24033119d1fdSJakub Kicinski case 16: 24043119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 24053119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 24063119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 24073119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 24083119d1fdSJakub Kicinski 24093119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 24103119d1fdSJakub Kicinski break; 24113119d1fdSJakub Kicinski case 32: 24123119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 24133119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 24143119d1fdSJakub Kicinski break; 24153119d1fdSJakub Kicinski case 64: 24163119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 24173119d1fdSJakub Kicinski 24183119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 24193119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 24203119d1fdSJakub Kicinski break; 24213119d1fdSJakub Kicinski } 24223119d1fdSJakub Kicinski 24233119d1fdSJakub Kicinski return 0; 24243119d1fdSJakub Kicinski } 24253119d1fdSJakub Kicinski 2426d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2427d9ae7f2bSJakub Kicinski { 24289f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 24299f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 24309f16c8abSJakub Kicinski u8 dst; 24319f16c8abSJakub Kicinski 24329f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 24339f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 24349f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 24359f16c8abSJakub Kicinski 24369f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 24379f16c8abSJakub Kicinski 24389f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 24399f16c8abSJakub Kicinski if (imm_hi == imm_lo) 24409f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 24419f16c8abSJakub Kicinski else 24429f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 2443d9ae7f2bSJakub Kicinski 2444d9ae7f2bSJakub Kicinski return 0; 2445d9ae7f2bSJakub Kicinski } 2446d9ae7f2bSJakub Kicinski 2447d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2448d9ae7f2bSJakub Kicinski { 2449d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 2450d9ae7f2bSJakub Kicinski return 0; 2451d9ae7f2bSJakub Kicinski } 2452d9ae7f2bSJakub Kicinski 2453d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2454d9ae7f2bSJakub Kicinski { 2455d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 2456d9ae7f2bSJakub Kicinski } 2457d9ae7f2bSJakub Kicinski 2458d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2459d9ae7f2bSJakub Kicinski { 2460d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 2461d9ae7f2bSJakub Kicinski } 2462d9ae7f2bSJakub Kicinski 2463d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2464d9ae7f2bSJakub Kicinski { 2465d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 2466d9ae7f2bSJakub Kicinski } 2467d9ae7f2bSJakub Kicinski 2468d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2469d9ae7f2bSJakub Kicinski { 2470d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 24710a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 2472d9ae7f2bSJakub Kicinski } 2473d9ae7f2bSJakub Kicinski 2474d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2475d9ae7f2bSJakub Kicinski { 2476d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 24770a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 2478d9ae7f2bSJakub Kicinski } 2479d9ae7f2bSJakub Kicinski 2480d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2481d9ae7f2bSJakub Kicinski { 2482d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 24830a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 2484d9ae7f2bSJakub Kicinski } 2485d9ae7f2bSJakub Kicinski 2486a82b23fbSJakub Kicinski static int 2487a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2488d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2489a82b23fbSJakub Kicinski { 2490d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2491b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 2492b14157eeSJakub Kicinski true, wrp_lmem_load); 2493a82b23fbSJakub Kicinski } 2494a82b23fbSJakub Kicinski 2495943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2496943c57b9SJakub Kicinski u8 size) 2497d9ae7f2bSJakub Kicinski { 2498bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2499bfddbc8aSJakub Kicinski 2500943c57b9SJakub Kicinski switch (meta->insn.off) { 2501c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 2502c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 2503943c57b9SJakub Kicinski return -EOPNOTSUPP; 2504bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 2505bfddbc8aSJakub Kicinski break; 2506c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 2507c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 2508bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2509bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2510bfddbc8aSJakub Kicinski break; 2511c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 2512c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 2513bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2514bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 2515bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2516943c57b9SJakub Kicinski break; 2517943c57b9SJakub Kicinski default: 2518d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2519943c57b9SJakub Kicinski } 2520943c57b9SJakub Kicinski 2521943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2522d9ae7f2bSJakub Kicinski 2523d9ae7f2bSJakub Kicinski return 0; 2524d9ae7f2bSJakub Kicinski } 2525d9ae7f2bSJakub Kicinski 2526943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2527943c57b9SJakub Kicinski u8 size) 2528d9ae7f2bSJakub Kicinski { 2529b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2530d9ae7f2bSJakub Kicinski 2531943c57b9SJakub Kicinski switch (meta->insn.off) { 2532c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 2533c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 2534c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2535c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2536943c57b9SJakub Kicinski break; 2537c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 2538c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 2539c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2540943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 2541943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2542943c57b9SJakub Kicinski break; 2543943c57b9SJakub Kicinski default: 2544943c57b9SJakub Kicinski return -EOPNOTSUPP; 2545943c57b9SJakub Kicinski } 2546d9ae7f2bSJakub Kicinski 2547943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2548d9ae7f2bSJakub Kicinski 2549d9ae7f2bSJakub Kicinski return 0; 2550d9ae7f2bSJakub Kicinski } 2551d9ae7f2bSJakub Kicinski 25522ca71441SJakub Kicinski static int 25532ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 25542ca71441SJakub Kicinski unsigned int size) 25552ca71441SJakub Kicinski { 25562ca71441SJakub Kicinski swreg tmp_reg; 25572ca71441SJakub Kicinski 25582ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 25592ca71441SJakub Kicinski 25603dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 25613dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 25623dd43c33SJakub Kicinski } 25633dd43c33SJakub Kicinski 25643dd43c33SJakub Kicinski static int 25653dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 25663dd43c33SJakub Kicinski unsigned int size) 25673dd43c33SJakub Kicinski { 25683dd43c33SJakub Kicinski swreg tmp_reg; 25693dd43c33SJakub Kicinski 25703dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 25713dd43c33SJakub Kicinski 25723dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 25733dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 25742ca71441SJakub Kicinski } 25752ca71441SJakub Kicinski 2576be759237SJiong Wang static void 2577be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 2578be759237SJiong Wang struct nfp_insn_meta *meta) 2579be759237SJiong Wang { 2580be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 2581be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 2582be759237SJiong Wang swreg src_base, off; 2583be759237SJiong Wang u8 xfer_num, len; 2584be759237SJiong Wang bool indir; 2585be759237SJiong Wang 2586be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 2587be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 2588be759237SJiong Wang len = range_end - range_start; 2589be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 2590be759237SJiong Wang 2591be759237SJiong Wang indir = len > 8 * REG_WIDTH; 2592be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 2593be759237SJiong Wang if (indir) 2594be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 2595be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 2596be759237SJiong Wang 2597be759237SJiong Wang /* Cache memory into transfer-in registers. */ 2598be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 2599b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 2600be759237SJiong Wang } 2601be759237SJiong Wang 2602be759237SJiong Wang static int 260391ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 260491ff69e8SJiong Wang struct nfp_insn_meta *meta, 260591ff69e8SJiong Wang unsigned int size) 260691ff69e8SJiong Wang { 260791ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 260891ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 260991ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 261091ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 261191ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 261291ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 261391ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 261491ff69e8SJiong Wang 261591ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 261691ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 261791ff69e8SJiong Wang src_lo = reg_xfer(idx); 261891ff69e8SJiong Wang 261991ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 262091ff69e8SJiong Wang if (size > REG_WIDTH - off) { 262191ff69e8SJiong Wang /* Calculate the part in the second register. */ 262291ff69e8SJiong Wang len_lo = REG_WIDTH - off; 262391ff69e8SJiong Wang len_mid = size - len_lo; 262491ff69e8SJiong Wang 262591ff69e8SJiong Wang /* Calculate the part in the third register. */ 262691ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 262791ff69e8SJiong Wang len_mid = REG_WIDTH; 262891ff69e8SJiong Wang } 262991ff69e8SJiong Wang 263091ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 263191ff69e8SJiong Wang 263291ff69e8SJiong Wang if (!len_mid) { 263391ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 263491ff69e8SJiong Wang return 0; 263591ff69e8SJiong Wang } 263691ff69e8SJiong Wang 263791ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 263891ff69e8SJiong Wang 263991ff69e8SJiong Wang if (size <= REG_WIDTH) { 264091ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 264191ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 264291ff69e8SJiong Wang } else { 264391ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 264491ff69e8SJiong Wang 264591ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 264691ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 264791ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 264891ff69e8SJiong Wang REG_WIDTH - len_lo); 264991ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 265091ff69e8SJiong Wang len_lo); 265191ff69e8SJiong Wang } 265291ff69e8SJiong Wang 265391ff69e8SJiong Wang return 0; 265491ff69e8SJiong Wang } 265591ff69e8SJiong Wang 265691ff69e8SJiong Wang static int 2657be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 2658be759237SJiong Wang struct nfp_insn_meta *meta, 2659be759237SJiong Wang unsigned int size) 2660be759237SJiong Wang { 2661be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 2662be759237SJiong Wang u8 dst_gpr, idx; 2663be759237SJiong Wang 2664be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 2665be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 2666be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 2667be759237SJiong Wang dst_lo = reg_both(dst_gpr); 2668be759237SJiong Wang src_lo = reg_xfer(idx); 2669be759237SJiong Wang 2670be759237SJiong Wang if (size < REG_WIDTH) { 2671be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 2672be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2673be759237SJiong Wang } else if (size == REG_WIDTH) { 2674be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2675be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2676be759237SJiong Wang } else { 2677be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 2678be759237SJiong Wang 2679be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2680be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 2681be759237SJiong Wang } 2682be759237SJiong Wang 2683be759237SJiong Wang return 0; 2684be759237SJiong Wang } 2685be759237SJiong Wang 2686be759237SJiong Wang static int 2687be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 2688be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 2689be759237SJiong Wang { 2690be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 2691be759237SJiong Wang 269291ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 2693be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 269491ff69e8SJiong Wang 269591ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 2696be759237SJiong Wang } 2697be759237SJiong Wang 26982ca71441SJakub Kicinski static int 26992ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 27002ca71441SJakub Kicinski unsigned int size) 27012ca71441SJakub Kicinski { 27029879a381SJiong Wang if (meta->ldst_gather_len) 27039879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 27049879a381SJiong Wang 27052ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2706012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 27072ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 27082ca71441SJakub Kicinski else 27092ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 27102ca71441SJakub Kicinski } 27112ca71441SJakub Kicinski 2712be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2713be759237SJiong Wang if (meta->pkt_cache.range_end) { 2714be759237SJiong Wang if (meta->pkt_cache.do_init) 2715be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2716be759237SJiong Wang 2717be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2718be759237SJiong Wang } else { 27192ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2720be759237SJiong Wang } 2721be759237SJiong Wang } 27222ca71441SJakub Kicinski 2723a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2724d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2725d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2726a82b23fbSJakub Kicinski 27273dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 27283dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 27293dd43c33SJakub Kicinski 27302ca71441SJakub Kicinski return -EOPNOTSUPP; 27312ca71441SJakub Kicinski } 27322ca71441SJakub Kicinski 27332ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 27342ca71441SJakub Kicinski { 27352ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 27362ca71441SJakub Kicinski } 27372ca71441SJakub Kicinski 27382ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 27392ca71441SJakub Kicinski { 27402ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 27412ca71441SJakub Kicinski } 27422ca71441SJakub Kicinski 2743d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2744d9ae7f2bSJakub Kicinski { 27452ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 27462ca71441SJakub Kicinski } 27472ca71441SJakub Kicinski 27482ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 27492ca71441SJakub Kicinski { 27502ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2751d9ae7f2bSJakub Kicinski } 2752d9ae7f2bSJakub Kicinski 2753e663fe38SJakub Kicinski static int 2754e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2755e663fe38SJakub Kicinski unsigned int size) 2756d9ae7f2bSJakub Kicinski { 2757e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2758e663fe38SJakub Kicinski swreg off_reg; 2759e663fe38SJakub Kicinski 2760e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2761e663fe38SJakub Kicinski 2762e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2763e663fe38SJakub Kicinski imm, size); 2764e663fe38SJakub Kicinski } 2765e663fe38SJakub Kicinski 2766e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2767e663fe38SJakub Kicinski unsigned int size) 2768e663fe38SJakub Kicinski { 2769e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2770e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2771e663fe38SJakub Kicinski 2772d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2773d9ae7f2bSJakub Kicinski } 2774d9ae7f2bSJakub Kicinski 2775e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2776d9ae7f2bSJakub Kicinski { 2777e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2778e663fe38SJakub Kicinski } 2779e663fe38SJakub Kicinski 2780e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2781e663fe38SJakub Kicinski { 2782e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2783e663fe38SJakub Kicinski } 2784e663fe38SJakub Kicinski 2785e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2786e663fe38SJakub Kicinski { 2787e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2788e663fe38SJakub Kicinski } 2789e663fe38SJakub Kicinski 2790e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2791e663fe38SJakub Kicinski { 2792e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2793e663fe38SJakub Kicinski } 2794e663fe38SJakub Kicinski 2795e663fe38SJakub Kicinski static int 2796e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2797e663fe38SJakub Kicinski unsigned int size) 2798e663fe38SJakub Kicinski { 2799e663fe38SJakub Kicinski swreg off_reg; 2800e663fe38SJakub Kicinski 2801e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2802e663fe38SJakub Kicinski 2803e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2804e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2805e663fe38SJakub Kicinski } 2806e663fe38SJakub Kicinski 2807e663fe38SJakub Kicinski static int 2808ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2809d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2810ee9133a8SJakub Kicinski { 2811d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2812b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2813b14157eeSJakub Kicinski false, wrp_lmem_store); 2814ee9133a8SJakub Kicinski } 2815ee9133a8SJakub Kicinski 2816d985888fSJakub Kicinski static int mem_stx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2817d985888fSJakub Kicinski { 2818d985888fSJakub Kicinski switch (meta->insn.off) { 2819d985888fSJakub Kicinski case offsetof(struct xdp_md, rx_queue_index): 2820d985888fSJakub Kicinski return nfp_queue_select(nfp_prog, meta); 2821d985888fSJakub Kicinski } 2822d985888fSJakub Kicinski 2823d985888fSJakub Kicinski WARN_ON_ONCE(1); /* verifier should have rejected bad accesses */ 2824d985888fSJakub Kicinski return -EOPNOTSUPP; 2825d985888fSJakub Kicinski } 2826d985888fSJakub Kicinski 2827ee9133a8SJakub Kicinski static int 2828e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2829e663fe38SJakub Kicinski unsigned int size) 2830e663fe38SJakub Kicinski { 2831e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2832e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2833e663fe38SJakub Kicinski 2834ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2835d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2836d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2837ee9133a8SJakub Kicinski 2838d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2839d9ae7f2bSJakub Kicinski } 2840d9ae7f2bSJakub Kicinski 2841e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2842e663fe38SJakub Kicinski { 2843e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2844e663fe38SJakub Kicinski } 2845e663fe38SJakub Kicinski 2846e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2847e663fe38SJakub Kicinski { 2848e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2849e663fe38SJakub Kicinski } 2850e663fe38SJakub Kicinski 2851d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2852d9ae7f2bSJakub Kicinski { 2853d985888fSJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) 2854d985888fSJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 2855d985888fSJakub Kicinski return mem_stx_xdp(nfp_prog, meta); 2856e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2857e663fe38SJakub Kicinski } 28582ca71441SJakub Kicinski 2859e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2860e663fe38SJakub Kicinski { 2861e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2862d9ae7f2bSJakub Kicinski } 2863d9ae7f2bSJakub Kicinski 2864dcb0c27fSJakub Kicinski static int 2865dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2866dcb0c27fSJakub Kicinski { 2867dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2868dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 286941aed09cSJakub Kicinski unsigned int full_add, out; 287041aed09cSJakub Kicinski swreg addra, addrb, off; 2871dcb0c27fSJakub Kicinski 2872dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2873dcb0c27fSJakub Kicinski 287441aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 287541aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 287641aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 287741aed09cSJakub Kicinski * code for both. 287841aed09cSJakub Kicinski */ 287941aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 288041aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 288141aed09cSJakub Kicinski 288241aed09cSJakub Kicinski if (meta->insn.off) { 288341aed09cSJakub Kicinski out += 2; 288441aed09cSJakub Kicinski full_add += 2; 288541aed09cSJakub Kicinski } 288641aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 288741aed09cSJakub Kicinski out += 3; 288841aed09cSJakub Kicinski full_add += 3; 288941aed09cSJakub Kicinski } 289041aed09cSJakub Kicinski if (meta->xadd_over_16bit) 289141aed09cSJakub Kicinski out += 2 + is64; 289241aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 289341aed09cSJakub Kicinski out += 5; 289441aed09cSJakub Kicinski full_add += 5; 289541aed09cSJakub Kicinski } 289641aed09cSJakub Kicinski 289741aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 289841aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 289941aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 290041aed09cSJakub Kicinski 290141aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 290241aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 290341aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 290441aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 290541aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 290641aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 290741aed09cSJakub Kicinski /* defer for add */ 290841aed09cSJakub Kicinski } 290941aed09cSJakub Kicinski 2910dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2911dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2912dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2913dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2914dcb0c27fSJakub Kicinski } else { 2915dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2916dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2917dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2918dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2919dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2920dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2921dcb0c27fSJakub Kicinski } 2922dcb0c27fSJakub Kicinski 292341aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 292441aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 292541aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 292641aed09cSJakub Kicinski 2927dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2928dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2929dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2930dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2931dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2932dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2933b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2934dcb0c27fSJakub Kicinski 293541aed09cSJakub Kicinski if (meta->xadd_over_16bit) 293641aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 293741aed09cSJakub Kicinski } 293841aed09cSJakub Kicinski 293941aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 294041aed09cSJakub Kicinski return -EINVAL; 294141aed09cSJakub Kicinski 294241aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 294341aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 294441aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 294541aed09cSJakub Kicinski addra, addrb, is64 << 2, 294641aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 294741aed09cSJakub Kicinski 294841aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 294941aed09cSJakub Kicinski if (is64) 295041aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 295141aed09cSJakub Kicinski } 295241aed09cSJakub Kicinski 295341aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 295441aed09cSJakub Kicinski return -EINVAL; 295541aed09cSJakub Kicinski 2956dcb0c27fSJakub Kicinski return 0; 2957dcb0c27fSJakub Kicinski } 2958dcb0c27fSJakub Kicinski 2959dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2960dcb0c27fSJakub Kicinski { 2961dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2962dcb0c27fSJakub Kicinski } 2963dcb0c27fSJakub Kicinski 2964dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2965dcb0c27fSJakub Kicinski { 2966dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2967dcb0c27fSJakub Kicinski } 2968dcb0c27fSJakub Kicinski 2969d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2970d9ae7f2bSJakub Kicinski { 2971d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2972d9ae7f2bSJakub Kicinski 2973d9ae7f2bSJakub Kicinski return 0; 2974d9ae7f2bSJakub Kicinski } 2975d9ae7f2bSJakub Kicinski 2976d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2977d9ae7f2bSJakub Kicinski { 2978d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2979d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2980b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2981b3f868dfSJakub Kicinski 2982b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2983b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2984d9ae7f2bSJakub Kicinski 2985d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2986d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2987d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2988d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2989d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2990d9ae7f2bSJakub Kicinski } 2991d9ae7f2bSJakub Kicinski 2992d9ae7f2bSJakub Kicinski if (imm >> 32) { 2993d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2994d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2995d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2996d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2997d9ae7f2bSJakub Kicinski } 2998d9ae7f2bSJakub Kicinski 2999d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 3000d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 3001d9ae7f2bSJakub Kicinski 3002d9ae7f2bSJakub Kicinski return 0; 3003d9ae7f2bSJakub Kicinski } 3004d9ae7f2bSJakub Kicinski 3005d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3006d9ae7f2bSJakub Kicinski { 3007d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3008d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 3009b3f868dfSJakub Kicinski swreg tmp_reg; 3010d9ae7f2bSJakub Kicinski 3011d9ae7f2bSJakub Kicinski if (!imm) { 3012d9ae7f2bSJakub Kicinski meta->skip = true; 3013d9ae7f2bSJakub Kicinski return 0; 3014d9ae7f2bSJakub Kicinski } 3015d9ae7f2bSJakub Kicinski 3016d9ae7f2bSJakub Kicinski if (imm & ~0U) { 3017d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3018d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3019d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 3020d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3021d9ae7f2bSJakub Kicinski } 3022d9ae7f2bSJakub Kicinski 3023d9ae7f2bSJakub Kicinski if (imm >> 32) { 3024d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3025d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3026d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 3027d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3028d9ae7f2bSJakub Kicinski } 3029d9ae7f2bSJakub Kicinski 3030d9ae7f2bSJakub Kicinski return 0; 3031d9ae7f2bSJakub Kicinski } 3032d9ae7f2bSJakub Kicinski 3033d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3034d9ae7f2bSJakub Kicinski { 3035d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3036d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 3037b3f868dfSJakub Kicinski swreg tmp_reg; 3038d9ae7f2bSJakub Kicinski 3039d9ae7f2bSJakub Kicinski if (!imm) { 3040d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 3041d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 3042d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 304382837370SJakub Kicinski return 0; 3044d9ae7f2bSJakub Kicinski } 3045d9ae7f2bSJakub Kicinski 3046d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3047d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3048d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 3049d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3050d9ae7f2bSJakub Kicinski 3051d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3052d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3053d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 3054d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3055d9ae7f2bSJakub Kicinski 3056d9ae7f2bSJakub Kicinski return 0; 3057d9ae7f2bSJakub Kicinski } 3058d9ae7f2bSJakub Kicinski 3059d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3060d9ae7f2bSJakub Kicinski { 3061d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3062d9ae7f2bSJakub Kicinski 3063d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 3064d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 3065d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 3066d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 3067d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3068d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 3069d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 3070d9ae7f2bSJakub Kicinski 3071d9ae7f2bSJakub Kicinski return 0; 3072d9ae7f2bSJakub Kicinski } 3073d9ae7f2bSJakub Kicinski 3074d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3075d9ae7f2bSJakub Kicinski { 3076d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 3077d9ae7f2bSJakub Kicinski } 3078d9ae7f2bSJakub Kicinski 3079d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3080d9ae7f2bSJakub Kicinski { 3081d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 3082d9ae7f2bSJakub Kicinski } 3083d9ae7f2bSJakub Kicinski 30842cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 30852cb230bdSJakub Kicinski { 30862cb230bdSJakub Kicinski switch (meta->insn.imm) { 30870d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 30880d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 30890c261593SJakub Kicinski case BPF_FUNC_xdp_adjust_tail: 30900c261593SJakub Kicinski return adjust_tail(nfp_prog, meta); 309177a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 309244d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 3093bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3094fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 3095df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 3096df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 30979816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 30989816dd35SJakub Kicinski return nfp_perf_event_output(nfp_prog, meta); 30992cb230bdSJakub Kicinski default: 31002cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 31012cb230bdSJakub Kicinski return -EOPNOTSUPP; 31022cb230bdSJakub Kicinski } 31032cb230bdSJakub Kicinski } 31042cb230bdSJakub Kicinski 3105d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3106d9ae7f2bSJakub Kicinski { 3107e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 3108d9ae7f2bSJakub Kicinski 3109d9ae7f2bSJakub Kicinski return 0; 3110d9ae7f2bSJakub Kicinski } 3111d9ae7f2bSJakub Kicinski 3112d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 3113d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 3114d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 3115d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 3116d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 3117d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 3118d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 3119d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 3120d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 3121d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 3122d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 3123d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 3124d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 3125d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_X] = mul_reg64, 3126d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_K] = mul_imm64, 31272a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_X] = div_reg64, 31282a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_K] = div_imm64, 3129254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 3130991f5b36SJiong Wang [BPF_ALU64 | BPF_LSH | BPF_X] = shl_reg64, 3131d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 3132991f5b36SJiong Wang [BPF_ALU64 | BPF_RSH | BPF_X] = shr_reg64, 3133d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 3134c217abccSJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_X] = ashr_reg64, 3135f43d0f17SJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_K] = ashr_imm64, 3136d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 3137d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 3138d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 3139d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 3140d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 3141d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 3142d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 3143d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 3144d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 3145d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 3146d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 3147d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 3148d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_X] = mul_reg, 3149d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_K] = mul_imm, 31502a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_X] = div_reg, 31512a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_K] = div_imm, 3152254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 3153d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 31543119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 3155d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 3156d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 3157d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 3158d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 3159d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 3160d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 3161d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 31622ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 31632ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 3164d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 31652ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 3166e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 3167e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 3168d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 3169e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 3170dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 3171dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 3172e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 3173e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 3174e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 3175e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 3176d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 3177d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 317861dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = cmp_imm, 317961dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = cmp_imm, 318061dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_K] = cmp_imm, 318161dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_K] = cmp_imm, 318261dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_K] = cmp_imm, 318361dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_K] = cmp_imm, 318461dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_K] = cmp_imm, 318561dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_K] = cmp_imm, 3186d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 3187d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 3188d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 318961dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = cmp_reg, 319061dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = cmp_reg, 319161dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_X] = cmp_reg, 319261dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_X] = cmp_reg, 319361dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_X] = cmp_reg, 319461dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_X] = cmp_reg, 319561dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_X] = cmp_reg, 319661dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_X] = cmp_reg, 3197d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 3198d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 31992cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 3200d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 3201d9ae7f2bSJakub Kicinski }; 3202d9ae7f2bSJakub Kicinski 3203d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 3204d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 3205d9ae7f2bSJakub Kicinski { 32065b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 3207854dc87dSJiong Wang u32 idx, br_idx; 3208d9ae7f2bSJakub Kicinski 3209854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 3210d9ae7f2bSJakub Kicinski if (meta->skip) 3211d9ae7f2bSJakub Kicinski continue; 32122cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 32132cb230bdSJakub Kicinski continue; 3214d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 3215d9ae7f2bSJakub Kicinski continue; 3216d9ae7f2bSJakub Kicinski 32175b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 32182314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 32195b674140SJiong Wang else 32202314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 3221854dc87dSJiong Wang 3222d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 3223d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 3224d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 3225d9ae7f2bSJakub Kicinski return -ELOOP; 3226d9ae7f2bSJakub Kicinski } 3227d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 32282314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 32292314fe9eSJakub Kicinski RELO_BR_REL) 3230d9ae7f2bSJakub Kicinski continue; 3231d9ae7f2bSJakub Kicinski 32325b674140SJiong Wang if (!meta->jmp_dst) { 32335b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 3234d9ae7f2bSJakub Kicinski return -ELOOP; 3235d9ae7f2bSJakub Kicinski } 3236d9ae7f2bSJakub Kicinski 32375b674140SJiong Wang jmp_dst = meta->jmp_dst; 3238854dc87dSJiong Wang 32395b674140SJiong Wang if (jmp_dst->skip) { 3240d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 3241d9ae7f2bSJakub Kicinski return -ELOOP; 3242d9ae7f2bSJakub Kicinski } 3243d9ae7f2bSJakub Kicinski 32442314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 3245d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 3246d9ae7f2bSJakub Kicinski continue; 32475b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 3248d9ae7f2bSJakub Kicinski } 3249d9ae7f2bSJakub Kicinski } 3250d9ae7f2bSJakub Kicinski 3251d9ae7f2bSJakub Kicinski return 0; 3252d9ae7f2bSJakub Kicinski } 3253d9ae7f2bSJakub Kicinski 3254d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 3255d9ae7f2bSJakub Kicinski { 325618e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 325718e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 325818e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 3259d9ae7f2bSJakub Kicinski } 3260d9ae7f2bSJakub Kicinski 3261d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 3262d9ae7f2bSJakub Kicinski { 3263d9ae7f2bSJakub Kicinski /* TC direct-action mode: 3264d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 3265d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 3266d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 3267d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 3268d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 3269d9ae7f2bSJakub Kicinski * 3270d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 3271d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 3272d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 3273d9ae7f2bSJakub Kicinski * packets up the stack. 3274d9ae7f2bSJakub Kicinski */ 3275d9ae7f2bSJakub Kicinski /* Target for aborts */ 3276d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3277d9ae7f2bSJakub Kicinski 3278e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3279d9ae7f2bSJakub Kicinski 3280c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3281d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 3282d9ae7f2bSJakub Kicinski 3283d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3284d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3285d9ae7f2bSJakub Kicinski 3286d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 3287d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 3288d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3289c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3290d9ae7f2bSJakub Kicinski 3291d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 3292d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 3293d9ae7f2bSJakub Kicinski 3294d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3295d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 3296d9ae7f2bSJakub Kicinski 3297d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3298d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 3299d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3300d9ae7f2bSJakub Kicinski 3301d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3302d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3303d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 3304d9ae7f2bSJakub Kicinski 3305e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3306d9ae7f2bSJakub Kicinski 3307d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3308d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 3309d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3310d9ae7f2bSJakub Kicinski } 3311d9ae7f2bSJakub Kicinski 3312d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 3313d9ae7f2bSJakub Kicinski { 3314d9ae7f2bSJakub Kicinski /* XDP return codes: 3315d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 3316d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 3317d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 3318d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 3319d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 3320d9ae7f2bSJakub Kicinski */ 3321d9ae7f2bSJakub Kicinski /* Target for aborts */ 3322d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3323d9ae7f2bSJakub Kicinski 3324e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3325d9ae7f2bSJakub Kicinski 3326c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3327d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 3328d9ae7f2bSJakub Kicinski 3329d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3330d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3331d9ae7f2bSJakub Kicinski 3332d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 3333d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 3334d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3335d9ae7f2bSJakub Kicinski 3336d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 3337d9ae7f2bSJakub Kicinski 3338d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3339d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 3340d9ae7f2bSJakub Kicinski 3341d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3342d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3343d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3344d9ae7f2bSJakub Kicinski 3345e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3346d9ae7f2bSJakub Kicinski 3347c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3348d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3349d9ae7f2bSJakub Kicinski } 3350d9ae7f2bSJakub Kicinski 3351d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 3352d9ae7f2bSJakub Kicinski { 3353012bb8a8SJakub Kicinski switch (nfp_prog->type) { 3354012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 3355d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 3356d9ae7f2bSJakub Kicinski break; 3357012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 3358d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 3359d9ae7f2bSJakub Kicinski break; 3360012bb8a8SJakub Kicinski default: 3361012bb8a8SJakub Kicinski WARN_ON(1); 3362d9ae7f2bSJakub Kicinski } 3363d9ae7f2bSJakub Kicinski } 3364d9ae7f2bSJakub Kicinski 3365d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 3366d9ae7f2bSJakub Kicinski { 3367d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3368ff42bb9fSJakub Kicinski int err; 3369d9ae7f2bSJakub Kicinski 3370d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 3371d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3372d9ae7f2bSJakub Kicinski return nfp_prog->error; 3373d9ae7f2bSJakub Kicinski 3374d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3375d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 3376d9ae7f2bSJakub Kicinski 3377d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 3378d9ae7f2bSJakub Kicinski 3379d9ae7f2bSJakub Kicinski if (meta->skip) { 3380d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3381d9ae7f2bSJakub Kicinski continue; 3382d9ae7f2bSJakub Kicinski } 3383d9ae7f2bSJakub Kicinski 3384d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 3385d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 3386d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 3387d9ae7f2bSJakub Kicinski if (!cb) 3388d9ae7f2bSJakub Kicinski return -ENOENT; 3389d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 3390d9ae7f2bSJakub Kicinski if (err) 3391d9ae7f2bSJakub Kicinski return err; 3392e8a4796eSJakub Kicinski if (nfp_prog->error) 3393e8a4796eSJakub Kicinski return nfp_prog->error; 3394d9ae7f2bSJakub Kicinski 3395d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3396d9ae7f2bSJakub Kicinski } 3397d9ae7f2bSJakub Kicinski 3398854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 3399854dc87dSJiong Wang 3400d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 3401d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3402d9ae7f2bSJakub Kicinski return nfp_prog->error; 3403d9ae7f2bSJakub Kicinski 3404ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 34051c03e03fSJakub Kicinski if (nfp_prog->error) 34061c03e03fSJakub Kicinski return nfp_prog->error; 34071c03e03fSJakub Kicinski 3408d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 3409d9ae7f2bSJakub Kicinski } 3410d9ae7f2bSJakub Kicinski 3411d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 3412d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 3413d9ae7f2bSJakub Kicinski { 3414d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3415d9ae7f2bSJakub Kicinski 3416d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3417d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 3418d9ae7f2bSJakub Kicinski 3419d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 3420d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 3421d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 3422d9ae7f2bSJakub Kicinski continue; 3423d9ae7f2bSJakub Kicinski 3424d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 3425d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 3426d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 3427d9ae7f2bSJakub Kicinski meta->skip = true; 3428d9ae7f2bSJakub Kicinski 3429d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 3430d9ae7f2bSJakub Kicinski if (!meta->skip) 3431d9ae7f2bSJakub Kicinski return; 3432d9ae7f2bSJakub Kicinski } 3433d9ae7f2bSJakub Kicinski } 3434d9ae7f2bSJakub Kicinski 34356c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 34366c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 34376c59500cSJakub Kicinski */ 34386c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 34396c59500cSJakub Kicinski { 34406c59500cSJakub Kicinski struct nfp_insn_meta *meta; 34416c59500cSJakub Kicinski 34426c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 34436c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 34446c59500cSJakub Kicinski 34456c59500cSJakub Kicinski if (meta->skip) 34466c59500cSJakub Kicinski continue; 34476c59500cSJakub Kicinski 34486c59500cSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_ALU && 34497bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_ALU64 && 34507bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_JMP) 34516c59500cSJakub Kicinski continue; 34526c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 34536c59500cSJakub Kicinski continue; 34546c59500cSJakub Kicinski if (insn.imm >= 0) 34556c59500cSJakub Kicinski continue; 34566c59500cSJakub Kicinski 34577bdc97beSJakub Kicinski if (BPF_CLASS(insn.code) == BPF_JMP) { 34587bdc97beSJakub Kicinski switch (BPF_OP(insn.code)) { 34597bdc97beSJakub Kicinski case BPF_JGE: 34607bdc97beSJakub Kicinski case BPF_JSGE: 34617bdc97beSJakub Kicinski case BPF_JLT: 34627bdc97beSJakub Kicinski case BPF_JSLT: 34637bdc97beSJakub Kicinski meta->jump_neg_op = true; 34647bdc97beSJakub Kicinski break; 34657bdc97beSJakub Kicinski default: 34667bdc97beSJakub Kicinski continue; 34677bdc97beSJakub Kicinski } 34687bdc97beSJakub Kicinski } else { 34696c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 34706c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 34716c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 34726c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 34736c59500cSJakub Kicinski else 34746c59500cSJakub Kicinski continue; 34756c59500cSJakub Kicinski 34766c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 34777bdc97beSJakub Kicinski } 34786c59500cSJakub Kicinski 34796c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 34806c59500cSJakub Kicinski } 34816c59500cSJakub Kicinski } 34826c59500cSJakub Kicinski 3483d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 3484d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 3485d9ae7f2bSJakub Kicinski { 3486d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3487d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 3488d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 3489d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 3490d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 3491d9ae7f2bSJakub Kicinski }; 3492d9ae7f2bSJakub Kicinski 3493d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3494d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 3495d9ae7f2bSJakub Kicinski 3496d9ae7f2bSJakub Kicinski insn = meta1->insn; 3497d9ae7f2bSJakub Kicinski next = meta2->insn; 3498d9ae7f2bSJakub Kicinski 3499d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3500d9ae7f2bSJakub Kicinski continue; 3501d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3502d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3503d9ae7f2bSJakub Kicinski continue; 3504d9ae7f2bSJakub Kicinski 3505d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 3506d9ae7f2bSJakub Kicinski continue; 3507d9ae7f2bSJakub Kicinski 3508d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 3509d9ae7f2bSJakub Kicinski continue; 3510d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 3511d9ae7f2bSJakub Kicinski continue; 3512d9ae7f2bSJakub Kicinski 3513d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 3514d9ae7f2bSJakub Kicinski continue; 3515d9ae7f2bSJakub Kicinski 35161266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 35171266f5d6SJiong Wang continue; 35181266f5d6SJiong Wang 3519d9ae7f2bSJakub Kicinski meta2->skip = true; 3520d9ae7f2bSJakub Kicinski } 3521d9ae7f2bSJakub Kicinski } 3522d9ae7f2bSJakub Kicinski 3523d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 3524d9ae7f2bSJakub Kicinski { 3525d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 3526d9ae7f2bSJakub Kicinski 3527d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 3528d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 3529d9ae7f2bSJakub Kicinski 3530d9ae7f2bSJakub Kicinski insn = meta1->insn; 3531d9ae7f2bSJakub Kicinski next1 = meta2->insn; 3532d9ae7f2bSJakub Kicinski next2 = meta3->insn; 3533d9ae7f2bSJakub Kicinski 3534d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3535d9ae7f2bSJakub Kicinski continue; 3536d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3537d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3538d9ae7f2bSJakub Kicinski continue; 3539d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 3540d9ae7f2bSJakub Kicinski continue; 3541d9ae7f2bSJakub Kicinski 3542d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 3543d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 3544d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 3545d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 3546d9ae7f2bSJakub Kicinski continue; 3547d9ae7f2bSJakub Kicinski 3548d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 3549d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 3550d9ae7f2bSJakub Kicinski continue; 3551d9ae7f2bSJakub Kicinski 3552d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 3553d9ae7f2bSJakub Kicinski continue; 3554d9ae7f2bSJakub Kicinski 355529fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 355629fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 355729fe46efSJiong Wang continue; 355829fe46efSJiong Wang 3559d9ae7f2bSJakub Kicinski meta2->skip = true; 3560d9ae7f2bSJakub Kicinski meta3->skip = true; 3561d9ae7f2bSJakub Kicinski } 3562d9ae7f2bSJakub Kicinski } 3563d9ae7f2bSJakub Kicinski 35646bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 35656bc7103cSJiong Wang * 35666bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 35676bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 35686bc7103cSJiong Wang * 35696bc7103cSJiong Wang * The destination register of load and source register of store should 35706bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 35716bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 35726bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 35736bc7103cSJiong Wang */ 35746bc7103cSJiong Wang static bool 35756bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 35766bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 35776bc7103cSJiong Wang { 35786bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 35796bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 35806bc7103cSJiong Wang 35816bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 35826bc7103cSJiong Wang return false; 35836bc7103cSJiong Wang 3584cc0dff6dSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET && 3585cc0dff6dSJiong Wang ld_meta->ptr.type != PTR_TO_MAP_VALUE) 35866bc7103cSJiong Wang return false; 35876bc7103cSJiong Wang 35886bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 35896bc7103cSJiong Wang return false; 35906bc7103cSJiong Wang 35916bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 35926bc7103cSJiong Wang return false; 35936bc7103cSJiong Wang 35946bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 35956bc7103cSJiong Wang return false; 35966bc7103cSJiong Wang 35976bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 35986bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 35996bc7103cSJiong Wang return false; 36006bc7103cSJiong Wang 36016bc7103cSJiong Wang return true; 36026bc7103cSJiong Wang } 36036bc7103cSJiong Wang 36046bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 36056bc7103cSJiong Wang * 36066bc7103cSJiong Wang * - Their address base registers are the same. 36076bc7103cSJiong Wang * - Their address offsets are in the same order. 36086bc7103cSJiong Wang * - They operate at the same memory width. 36096bc7103cSJiong Wang * - There is no jump into the middle of them. 36106bc7103cSJiong Wang */ 36116bc7103cSJiong Wang static bool 36126bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 36136bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 36146bc7103cSJiong Wang struct bpf_insn *prev_ld, 36156bc7103cSJiong Wang struct bpf_insn *prev_st) 36166bc7103cSJiong Wang { 36176bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 36186bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 36196bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 36206bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 36216bc7103cSJiong Wang 36226bc7103cSJiong Wang /* This pair is the start pair. */ 36236bc7103cSJiong Wang if (!prev_ld) 36246bc7103cSJiong Wang return true; 36256bc7103cSJiong Wang 36266bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 36276bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 36286bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 36296bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 36306bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 36316bc7103cSJiong Wang prev_ld_off = prev_ld->off; 36326bc7103cSJiong Wang prev_st_off = prev_st->off; 36336bc7103cSJiong Wang 36346bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 36356bc7103cSJiong Wang return false; 36366bc7103cSJiong Wang 36376bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 36386bc7103cSJiong Wang return false; 36396bc7103cSJiong Wang 36406bc7103cSJiong Wang if (curr_size != prev_size) 36416bc7103cSJiong Wang return false; 36426bc7103cSJiong Wang 36436bc7103cSJiong Wang /* There is jump to the head of this pair. */ 36446bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 36456bc7103cSJiong Wang return false; 36466bc7103cSJiong Wang 36476bc7103cSJiong Wang /* Both in ascending order. */ 36486bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 36496bc7103cSJiong Wang prev_st_off + prev_size == st->off) 36506bc7103cSJiong Wang return true; 36516bc7103cSJiong Wang 36526bc7103cSJiong Wang /* Both in descending order. */ 36536bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 36546bc7103cSJiong Wang st->off + curr_size == prev_st_off) 36556bc7103cSJiong Wang return true; 36566bc7103cSJiong Wang 36576bc7103cSJiong Wang return false; 36586bc7103cSJiong Wang } 36596bc7103cSJiong Wang 36606bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 36616bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 36626bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 36636bc7103cSJiong Wang * as an memory copy. 36646bc7103cSJiong Wang */ 36656bc7103cSJiong Wang static bool 36666bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 36676bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 36686bc7103cSJiong Wang { 36696bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 36706bc7103cSJiong Wang 36716bc7103cSJiong Wang /* Different pointer types does not overlap. */ 36726bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 36736bc7103cSJiong Wang return false; 36746bc7103cSJiong Wang 36756bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 36766bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 36776bc7103cSJiong Wang return true; 36786bc7103cSJiong Wang 36796bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 36806bc7103cSJiong Wang * base register. 36816bc7103cSJiong Wang */ 36826bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 36836bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 36846bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 36856bc7103cSJiong Wang 36866bc7103cSJiong Wang /* Ascending order cross. */ 36876bc7103cSJiong Wang if (ld_off > head_ld_off && 36886bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 36896bc7103cSJiong Wang return true; 36906bc7103cSJiong Wang 36916bc7103cSJiong Wang /* Descending order cross. */ 36926bc7103cSJiong Wang if (ld_off < head_ld_off && 36936bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 36946bc7103cSJiong Wang return true; 36956bc7103cSJiong Wang 36966bc7103cSJiong Wang return false; 36976bc7103cSJiong Wang } 36986bc7103cSJiong Wang 36996bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 37006bc7103cSJiong Wang * 37016bc7103cSJiong Wang * load R, [regA + offA] 37026bc7103cSJiong Wang * store [regB + offB], R 37036bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 37046bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 37056bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 37066bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 37076bc7103cSJiong Wang * ... 37086bc7103cSJiong Wang * 37096bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 37106bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 37116bc7103cSJiong Wang */ 37126bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 37136bc7103cSJiong Wang { 37146bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 37156bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 37166bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 37176bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 37186bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 37196bc7103cSJiong Wang u8 count = 0; 37206bc7103cSJiong Wang 37216bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 37226bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 37236bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 37246bc7103cSJiong Wang 37256bc7103cSJiong Wang /* Reset record status if any of the following if true: 37266bc7103cSJiong Wang * - The current insn pair is not load/store. 37276bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 37286bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 37296bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 37306bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 37316bc7103cSJiong Wang * single NFP CPP command can transfer. 37326bc7103cSJiong Wang */ 37336bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 37346bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 37356bc7103cSJiong Wang prev_st) || 37366bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 37376bc7103cSJiong Wang head_st_meta) || 37386bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 37396bc7103cSJiong Wang if (!count) 37406bc7103cSJiong Wang continue; 37416bc7103cSJiong Wang 37426bc7103cSJiong Wang if (count > 1) { 37436bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 37446bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 37456bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 37466bc7103cSJiong Wang 37476bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 37486bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 37496bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 37506bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 37516bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 37526bc7103cSJiong Wang } 37536bc7103cSJiong Wang 37546bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 37556bc7103cSJiong Wang head_st_meta->skip = true; 37566bc7103cSJiong Wang } else { 37576bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 37586bc7103cSJiong Wang } 37596bc7103cSJiong Wang 37606bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 37616bc7103cSJiong Wang * could serve as the new head of the the next chain. 37626bc7103cSJiong Wang */ 37636bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 37646bc7103cSJiong Wang head_ld_meta = meta1; 37656bc7103cSJiong Wang head_st_meta = meta2; 37666bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 37676bc7103cSJiong Wang BPF_LDST_BYTES(ld); 37686bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 37696bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 37706bc7103cSJiong Wang prev_ld = ld; 37716bc7103cSJiong Wang prev_st = st; 37726bc7103cSJiong Wang count = 1; 37736bc7103cSJiong Wang } else { 37746bc7103cSJiong Wang head_ld_meta = NULL; 37756bc7103cSJiong Wang head_st_meta = NULL; 37766bc7103cSJiong Wang prev_ld = NULL; 37776bc7103cSJiong Wang prev_st = NULL; 37786bc7103cSJiong Wang count = 0; 37796bc7103cSJiong Wang } 37806bc7103cSJiong Wang 37816bc7103cSJiong Wang continue; 37826bc7103cSJiong Wang } 37836bc7103cSJiong Wang 37846bc7103cSJiong Wang if (!head_ld_meta) { 37856bc7103cSJiong Wang head_ld_meta = meta1; 37866bc7103cSJiong Wang head_st_meta = meta2; 37876bc7103cSJiong Wang } else { 37886bc7103cSJiong Wang meta1->skip = true; 37896bc7103cSJiong Wang meta2->skip = true; 37906bc7103cSJiong Wang } 37916bc7103cSJiong Wang 37926bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 37936bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 37946bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 37956bc7103cSJiong Wang prev_ld = ld; 37966bc7103cSJiong Wang prev_st = st; 37976bc7103cSJiong Wang count++; 37986bc7103cSJiong Wang } 37996bc7103cSJiong Wang } 38006bc7103cSJiong Wang 380187b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 380287b10ecdSJiong Wang { 380387b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 380487b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 380587b10ecdSJiong Wang bool cache_avail = false; 380687b10ecdSJiong Wang struct bpf_insn *insn; 380787b10ecdSJiong Wang s32 range_ptr_off = 0; 380887b10ecdSJiong Wang u32 range_ptr_id = 0; 380987b10ecdSJiong Wang 381087b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 381187b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 381287b10ecdSJiong Wang cache_avail = false; 381387b10ecdSJiong Wang 381487b10ecdSJiong Wang if (meta->skip) 381587b10ecdSJiong Wang continue; 381687b10ecdSJiong Wang 381787b10ecdSJiong Wang insn = &meta->insn; 381887b10ecdSJiong Wang 381987b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 382087b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 382187b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 382287b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 382387b10ecdSJiong Wang cache_avail = false; 382487b10ecdSJiong Wang continue; 382587b10ecdSJiong Wang } 382687b10ecdSJiong Wang 382787b10ecdSJiong Wang if (!is_mbpf_load(meta)) 382887b10ecdSJiong Wang continue; 382987b10ecdSJiong Wang 383087b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 383187b10ecdSJiong Wang cache_avail = false; 383287b10ecdSJiong Wang continue; 383387b10ecdSJiong Wang } 383487b10ecdSJiong Wang 383587b10ecdSJiong Wang if (!cache_avail) { 383687b10ecdSJiong Wang cache_avail = true; 383787b10ecdSJiong Wang if (range_node) 383887b10ecdSJiong Wang goto end_current_then_start_new; 383987b10ecdSJiong Wang goto start_new; 384087b10ecdSJiong Wang } 384187b10ecdSJiong Wang 384287b10ecdSJiong Wang /* Check ID to make sure two reads share the same 384387b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 384487b10ecdSJiong Wang * to make sure they also share the same constant 384587b10ecdSJiong Wang * offset. 384687b10ecdSJiong Wang * 384787b10ecdSJiong Wang * OFFs don't really need to be the same, because they 384887b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 384987b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 385087b10ecdSJiong Wang * offsets against original packet pointer. We don't 385187b10ecdSJiong Wang * support this. 385287b10ecdSJiong Wang */ 385387b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 385487b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 385587b10ecdSJiong Wang s16 new_start = range_start; 385687b10ecdSJiong Wang s16 end, off = insn->off; 385787b10ecdSJiong Wang s16 new_end = range_end; 385887b10ecdSJiong Wang bool changed = false; 385987b10ecdSJiong Wang 386087b10ecdSJiong Wang if (off < range_start) { 386187b10ecdSJiong Wang new_start = off; 386287b10ecdSJiong Wang changed = true; 386387b10ecdSJiong Wang } 386487b10ecdSJiong Wang 386587b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 386687b10ecdSJiong Wang if (end > range_end) { 386787b10ecdSJiong Wang new_end = end; 386887b10ecdSJiong Wang changed = true; 386987b10ecdSJiong Wang } 387087b10ecdSJiong Wang 387187b10ecdSJiong Wang if (!changed) 387287b10ecdSJiong Wang continue; 387387b10ecdSJiong Wang 387487b10ecdSJiong Wang if (new_end - new_start <= 64) { 387587b10ecdSJiong Wang /* Install new range. */ 387687b10ecdSJiong Wang range_start = new_start; 387787b10ecdSJiong Wang range_end = new_end; 387887b10ecdSJiong Wang continue; 387987b10ecdSJiong Wang } 388087b10ecdSJiong Wang } 388187b10ecdSJiong Wang 388287b10ecdSJiong Wang end_current_then_start_new: 388387b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 388487b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 388587b10ecdSJiong Wang start_new: 388687b10ecdSJiong Wang range_node = meta; 388787b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 388887b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 388987b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 389087b10ecdSJiong Wang range_start = insn->off; 389187b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 389287b10ecdSJiong Wang } 389387b10ecdSJiong Wang 389487b10ecdSJiong Wang if (range_node) { 389587b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 389687b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 389787b10ecdSJiong Wang } 389887b10ecdSJiong Wang 389987b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 390087b10ecdSJiong Wang if (meta->skip) 390187b10ecdSJiong Wang continue; 390287b10ecdSJiong Wang 390387b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 390487b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 390587b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 390687b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 390787b10ecdSJiong Wang } else { 390887b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 390987b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 391087b10ecdSJiong Wang } 391187b10ecdSJiong Wang } 391287b10ecdSJiong Wang } 391387b10ecdSJiong Wang } 391487b10ecdSJiong Wang 3915d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 3916d9ae7f2bSJakub Kicinski { 3917d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 3918d9ae7f2bSJakub Kicinski 39196c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 3920d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 3921d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 39226bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 392387b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 3924d9ae7f2bSJakub Kicinski 3925d9ae7f2bSJakub Kicinski return 0; 3926d9ae7f2bSJakub Kicinski } 3927d9ae7f2bSJakub Kicinski 3928b4264c96SJakub Kicinski static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) 3929b4264c96SJakub Kicinski { 3930b4264c96SJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3931b4264c96SJakub Kicinski struct nfp_bpf_map *nfp_map; 3932b4264c96SJakub Kicinski struct bpf_map *map; 3933ab01f4acSJakub Kicinski u32 id; 3934b4264c96SJakub Kicinski 3935b4264c96SJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3936b4264c96SJakub Kicinski if (meta1->skip || meta2->skip) 3937b4264c96SJakub Kicinski continue; 3938b4264c96SJakub Kicinski 3939b4264c96SJakub Kicinski if (meta1->insn.code != (BPF_LD | BPF_IMM | BPF_DW) || 3940b4264c96SJakub Kicinski meta1->insn.src_reg != BPF_PSEUDO_MAP_FD) 3941b4264c96SJakub Kicinski continue; 3942b4264c96SJakub Kicinski 3943b4264c96SJakub Kicinski map = (void *)(unsigned long)((u32)meta1->insn.imm | 3944b4264c96SJakub Kicinski (u64)meta2->insn.imm << 32); 3945ab01f4acSJakub Kicinski if (bpf_map_offload_neutral(map)) { 3946ab01f4acSJakub Kicinski id = map->id; 3947ab01f4acSJakub Kicinski } else { 3948b4264c96SJakub Kicinski nfp_map = map_to_offmap(map)->dev_priv; 3949ab01f4acSJakub Kicinski id = nfp_map->tid; 3950ab01f4acSJakub Kicinski } 3951b4264c96SJakub Kicinski 3952ab01f4acSJakub Kicinski meta1->insn.imm = id; 3953b4264c96SJakub Kicinski meta2->insn.imm = 0; 3954b4264c96SJakub Kicinski } 3955b4264c96SJakub Kicinski 3956b4264c96SJakub Kicinski return 0; 3957b4264c96SJakub Kicinski } 3958b4264c96SJakub Kicinski 39592314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 3960fd068ddcSJakub Kicinski { 39612314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 3962fd068ddcSJakub Kicinski int i; 3963fd068ddcSJakub Kicinski 39642314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 3965fd068ddcSJakub Kicinski int err; 3966fd068ddcSJakub Kicinski 39672314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 3968fd068ddcSJakub Kicinski if (err) 3969fd068ddcSJakub Kicinski return err; 3970fd068ddcSJakub Kicinski 39712314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 3972fd068ddcSJakub Kicinski } 3973fd068ddcSJakub Kicinski 3974fd068ddcSJakub Kicinski return 0; 3975fd068ddcSJakub Kicinski } 3976fd068ddcSJakub Kicinski 397744a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 397844a12eccSJakub Kicinski { 397944a12eccSJakub Kicinski void *prog; 398044a12eccSJakub Kicinski 398144a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 398244a12eccSJakub Kicinski if (!prog) 398344a12eccSJakub Kicinski return; 398444a12eccSJakub Kicinski 398544a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 398644a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 398744a12eccSJakub Kicinski kvfree(nfp_prog->prog); 398844a12eccSJakub Kicinski nfp_prog->prog = prog; 398944a12eccSJakub Kicinski } 399044a12eccSJakub Kicinski 3991c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3992d9ae7f2bSJakub Kicinski { 3993d9ae7f2bSJakub Kicinski int ret; 3994d9ae7f2bSJakub Kicinski 3995b4264c96SJakub Kicinski ret = nfp_bpf_replace_map_ptrs(nfp_prog); 3996b4264c96SJakub Kicinski if (ret) 3997b4264c96SJakub Kicinski return ret; 3998b4264c96SJakub Kicinski 3999d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 4000d9ae7f2bSJakub Kicinski if (ret) 40019314c442SJakub Kicinski return ret; 4002d9ae7f2bSJakub Kicinski 4003d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 4004d9ae7f2bSJakub Kicinski if (ret) { 4005d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 4006d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 40079314c442SJakub Kicinski return -EINVAL; 4008d9ae7f2bSJakub Kicinski } 4009d9ae7f2bSJakub Kicinski 401044a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 401144a12eccSJakub Kicinski 40122314fe9eSJakub Kicinski return ret; 4013d9ae7f2bSJakub Kicinski } 40141549921dSJakub Kicinski 40151549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 40161549921dSJakub Kicinski { 40171549921dSJakub Kicinski struct nfp_insn_meta *meta; 40181549921dSJakub Kicinski 40191549921dSJakub Kicinski /* Another pass to record jump information. */ 40201549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 40211549921dSJakub Kicinski u64 code = meta->insn.code; 40221549921dSJakub Kicinski 40231549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 40241549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 40251549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 40261549921dSJakub Kicinski unsigned short dst_indx; 40271549921dSJakub Kicinski 40281549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 40291549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 40301549921dSJakub Kicinski cnt); 40311549921dSJakub Kicinski 40321549921dSJakub Kicinski meta->jmp_dst = dst_meta; 40331549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 40341549921dSJakub Kicinski } 40351549921dSJakub Kicinski } 40361549921dSJakub Kicinski } 40372314fe9eSJakub Kicinski 403874801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 403974801e50SQuentin Monnet { 404074801e50SQuentin Monnet return !!instr_cb[code]; 404174801e50SQuentin Monnet } 404274801e50SQuentin Monnet 40432314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 40442314fe9eSJakub Kicinski { 40452314fe9eSJakub Kicinski unsigned int i; 40462314fe9eSJakub Kicinski u64 *prog; 40472314fe9eSJakub Kicinski int err; 40482314fe9eSJakub Kicinski 40492314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 40502314fe9eSJakub Kicinski GFP_KERNEL); 40512314fe9eSJakub Kicinski if (!prog) 40522314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 40532314fe9eSJakub Kicinski 40542314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 40552314fe9eSJakub Kicinski enum nfp_relo_type special; 405677a3d311SJakub Kicinski u32 val; 40572314fe9eSJakub Kicinski 40582314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 40592314fe9eSJakub Kicinski switch (special) { 40602314fe9eSJakub Kicinski case RELO_NONE: 40612314fe9eSJakub Kicinski continue; 40622314fe9eSJakub Kicinski case RELO_BR_REL: 40632314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 40642314fe9eSJakub Kicinski break; 40652314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 40662314fe9eSJakub Kicinski br_set_offset(&prog[i], 40672314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 40682314fe9eSJakub Kicinski break; 40692314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 40702314fe9eSJakub Kicinski br_set_offset(&prog[i], 40712314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 40722314fe9eSJakub Kicinski break; 40732314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 40742314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 40752314fe9eSJakub Kicinski break; 407677a3d311SJakub Kicinski case RELO_BR_HELPER: 407777a3d311SJakub Kicinski val = br_get_offset(prog[i]); 407877a3d311SJakub Kicinski val -= BR_OFF_RELO; 407977a3d311SJakub Kicinski switch (val) { 408077a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 408177a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 408277a3d311SJakub Kicinski break; 408344d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 408444d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 408544d65a47SJakub Kicinski break; 4086bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 4087bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 4088bfee64deSJakub Kicinski break; 40899816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 40909816dd35SJakub Kicinski val = nfp_prog->bpf->helpers.perf_event_output; 40919816dd35SJakub Kicinski break; 409277a3d311SJakub Kicinski default: 409377a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 409477a3d311SJakub Kicinski val); 409577a3d311SJakub Kicinski err = -EINVAL; 409677a3d311SJakub Kicinski goto err_free_prog; 409777a3d311SJakub Kicinski } 409877a3d311SJakub Kicinski br_set_offset(&prog[i], val); 409977a3d311SJakub Kicinski break; 410077a3d311SJakub Kicinski case RELO_IMMED_REL: 410177a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 410277a3d311SJakub Kicinski break; 41032314fe9eSJakub Kicinski } 41042314fe9eSJakub Kicinski 41052314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 41062314fe9eSJakub Kicinski } 41072314fe9eSJakub Kicinski 41082314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 41092314fe9eSJakub Kicinski if (err) 41102314fe9eSJakub Kicinski goto err_free_prog; 41112314fe9eSJakub Kicinski 41122314fe9eSJakub Kicinski return prog; 41132314fe9eSJakub Kicinski 41142314fe9eSJakub Kicinski err_free_prog: 41152314fe9eSJakub Kicinski kfree(prog); 41162314fe9eSJakub Kicinski return ERR_PTR(err); 41172314fe9eSJakub Kicinski } 4118