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 164577a3d311SJakub Kicinski static int 1646fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 164777a3d311SJakub Kicinski { 164877a3d311SJakub Kicinski bool load_lm_ptr; 164977a3d311SJakub Kicinski u32 ret_tgt; 165077a3d311SJakub Kicinski s64 lm_off; 165177a3d311SJakub Kicinski 165277a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 165377a3d311SJakub Kicinski lm_off = nfp_prog->stack_depth; 16542f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 16552f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 165677a3d311SJakub Kicinski 165777a3d311SJakub Kicinski /* Set LM0 to start of key */ 165877a3d311SJakub Kicinski if (load_lm_ptr) 165977a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 166044d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 166144d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 166277a3d311SJakub Kicinski 1663fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 166477a3d311SJakub Kicinski 2, RELO_BR_HELPER); 166577a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 166677a3d311SJakub Kicinski 166777a3d311SJakub Kicinski /* Load map ID into A0 */ 1668b4264c96SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), reg_a(2)); 166977a3d311SJakub Kicinski 167077a3d311SJakub Kicinski /* Load the return address into B0 */ 167177a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 167277a3d311SJakub Kicinski 167377a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 167477a3d311SJakub Kicinski return -EINVAL; 167577a3d311SJakub Kicinski 167677a3d311SJakub Kicinski /* Reset the LM0 pointer */ 167777a3d311SJakub Kicinski if (!load_lm_ptr) 167877a3d311SJakub Kicinski return 0; 167977a3d311SJakub Kicinski 168077a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 168177a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 168277a3d311SJakub Kicinski 168377a3d311SJakub Kicinski return 0; 168477a3d311SJakub Kicinski } 168577a3d311SJakub Kicinski 1686df4a37d8SJakub Kicinski static int 1687df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1688df4a37d8SJakub Kicinski { 1689df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1690df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1691df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1692df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1693df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1694df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1695df4a37d8SJakub Kicinski return 0; 1696df4a37d8SJakub Kicinski } 1697df4a37d8SJakub Kicinski 16989816dd35SJakub Kicinski static int 16999816dd35SJakub Kicinski nfp_perf_event_output(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 17009816dd35SJakub Kicinski { 17019816dd35SJakub Kicinski swreg ptr_type; 17029816dd35SJakub Kicinski u32 ret_tgt; 17039816dd35SJakub Kicinski 17049816dd35SJakub Kicinski ptr_type = ur_load_imm_any(nfp_prog, meta->arg1.type, imm_a(nfp_prog)); 17059816dd35SJakub Kicinski 17069816dd35SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 17079816dd35SJakub Kicinski 17089816dd35SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 17099816dd35SJakub Kicinski 2, RELO_BR_HELPER); 17109816dd35SJakub Kicinski 17119816dd35SJakub Kicinski /* Load ptr type into A1 */ 17129816dd35SJakub Kicinski wrp_mov(nfp_prog, reg_a(1), ptr_type); 17139816dd35SJakub Kicinski 17149816dd35SJakub Kicinski /* Load the return address into B0 */ 17159816dd35SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 17169816dd35SJakub Kicinski 17179816dd35SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 17189816dd35SJakub Kicinski return -EINVAL; 17199816dd35SJakub Kicinski 17209816dd35SJakub Kicinski return 0; 17219816dd35SJakub Kicinski } 17229816dd35SJakub Kicinski 1723d985888fSJakub Kicinski static int 1724d985888fSJakub Kicinski nfp_queue_select(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1725d985888fSJakub Kicinski { 1726d985888fSJakub Kicinski u32 jmp_tgt; 1727d985888fSJakub Kicinski 1728d985888fSJakub Kicinski jmp_tgt = nfp_prog_current_offset(nfp_prog) + 5; 1729d985888fSJakub Kicinski 1730d985888fSJakub Kicinski /* Make sure the queue id fits into FW field */ 1731d985888fSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(meta->insn.src_reg * 2), 1732d985888fSJakub Kicinski ALU_OP_AND_NOT_B, reg_imm(0xff)); 1733d985888fSJakub Kicinski emit_br(nfp_prog, BR_BEQ, jmp_tgt, 2); 1734d985888fSJakub Kicinski 1735d985888fSJakub Kicinski /* Set the 'queue selected' bit and the queue value */ 1736d985888fSJakub Kicinski emit_shf(nfp_prog, pv_qsel_set(nfp_prog), 1737d985888fSJakub Kicinski pv_qsel_set(nfp_prog), SHF_OP_OR, reg_imm(1), 1738d985888fSJakub Kicinski SHF_SC_L_SHF, PKT_VEL_QSEL_SET_BIT); 1739d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1740d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_b(meta->insn.src_reg * 2), 1741d985888fSJakub Kicinski SHF_SC_NONE, 0); 1742d985888fSJakub Kicinski /* Delay slots end here, we will jump over next instruction if queue 1743d985888fSJakub Kicinski * value fits into the field. 1744d985888fSJakub Kicinski */ 1745d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1746d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_imm(NFP_NET_RXR_MAX), 1747d985888fSJakub Kicinski SHF_SC_NONE, 0); 1748d985888fSJakub Kicinski 1749d985888fSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, jmp_tgt)) 1750d985888fSJakub Kicinski return -EINVAL; 1751d985888fSJakub Kicinski 1752d985888fSJakub Kicinski return 0; 1753d985888fSJakub Kicinski } 1754d985888fSJakub Kicinski 1755d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1756d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1757d9ae7f2bSJakub Kicinski { 1758d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1759b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1760b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1761d9ae7f2bSJakub Kicinski 1762b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1763b14157eeSJakub Kicinski swreg stack_depth_reg; 1764b14157eeSJakub Kicinski 1765b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 1766b14157eeSJakub Kicinski nfp_prog->stack_depth, 1767b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1768b14157eeSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), 1769b14157eeSJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_depth_reg); 1770b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1771b14157eeSJakub Kicinski } else { 1772b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1773b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1774b14157eeSJakub Kicinski } 1775d9ae7f2bSJakub Kicinski 1776d9ae7f2bSJakub Kicinski return 0; 1777d9ae7f2bSJakub Kicinski } 1778d9ae7f2bSJakub Kicinski 1779d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1780d9ae7f2bSJakub Kicinski { 1781d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1782d9ae7f2bSJakub Kicinski 1783d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1784d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1785d9ae7f2bSJakub Kicinski 1786d9ae7f2bSJakub Kicinski return 0; 1787d9ae7f2bSJakub Kicinski } 1788d9ae7f2bSJakub Kicinski 1789d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1790d9ae7f2bSJakub Kicinski { 1791d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1792d9ae7f2bSJakub Kicinski } 1793d9ae7f2bSJakub Kicinski 1794d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1795d9ae7f2bSJakub Kicinski { 1796d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1797d9ae7f2bSJakub Kicinski } 1798d9ae7f2bSJakub Kicinski 1799d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1800d9ae7f2bSJakub Kicinski { 1801d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1802d9ae7f2bSJakub Kicinski } 1803d9ae7f2bSJakub Kicinski 1804d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1805d9ae7f2bSJakub Kicinski { 1806d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1807d9ae7f2bSJakub Kicinski } 1808d9ae7f2bSJakub Kicinski 1809d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1810d9ae7f2bSJakub Kicinski { 1811d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1812d9ae7f2bSJakub Kicinski } 1813d9ae7f2bSJakub Kicinski 1814d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1815d9ae7f2bSJakub Kicinski { 1816d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1817d9ae7f2bSJakub Kicinski } 1818d9ae7f2bSJakub Kicinski 1819d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1820d9ae7f2bSJakub Kicinski { 1821d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1822d9ae7f2bSJakub Kicinski 1823d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1824d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1825d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1826d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1827d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1828d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1829d9ae7f2bSJakub Kicinski 1830d9ae7f2bSJakub Kicinski return 0; 1831d9ae7f2bSJakub Kicinski } 1832d9ae7f2bSJakub Kicinski 1833d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1834d9ae7f2bSJakub Kicinski { 1835d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1836d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1837d9ae7f2bSJakub Kicinski 1838d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1839d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1840d9ae7f2bSJakub Kicinski 1841d9ae7f2bSJakub Kicinski return 0; 1842d9ae7f2bSJakub Kicinski } 1843d9ae7f2bSJakub Kicinski 1844d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1845d9ae7f2bSJakub Kicinski { 1846d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1847d9ae7f2bSJakub Kicinski 1848d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1849d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1850d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1851d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1852d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1853d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1854d9ae7f2bSJakub Kicinski 1855d9ae7f2bSJakub Kicinski return 0; 1856d9ae7f2bSJakub Kicinski } 1857d9ae7f2bSJakub Kicinski 1858d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1859d9ae7f2bSJakub Kicinski { 1860d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1861d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1862d9ae7f2bSJakub Kicinski 1863d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1864d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1865d9ae7f2bSJakub Kicinski 1866d9ae7f2bSJakub Kicinski return 0; 1867d9ae7f2bSJakub Kicinski } 1868d9ae7f2bSJakub Kicinski 1869d3d23fdbSJiong Wang static int mul_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1870d3d23fdbSJiong Wang { 1871d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, true); 1872d3d23fdbSJiong Wang } 1873d3d23fdbSJiong Wang 1874d3d23fdbSJiong Wang static int mul_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1875d3d23fdbSJiong Wang { 1876d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, false); 1877d3d23fdbSJiong Wang } 1878d3d23fdbSJiong Wang 18792a952b03SJiong Wang static int div_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 18802a952b03SJiong Wang { 18812a952b03SJiong Wang const struct bpf_insn *insn = &meta->insn; 18822a952b03SJiong Wang 18832a952b03SJiong Wang return wrp_div_imm(nfp_prog, insn->dst_reg * 2, insn->imm); 18842a952b03SJiong Wang } 18852a952b03SJiong Wang 18862a952b03SJiong Wang static int div_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 18872a952b03SJiong Wang { 18882a952b03SJiong Wang /* NOTE: verifier hook has rejected cases for which verifier doesn't 18892a952b03SJiong Wang * know whether the source operand is constant or not. 18902a952b03SJiong Wang */ 18912a952b03SJiong Wang return wrp_div_imm(nfp_prog, meta->insn.dst_reg * 2, meta->umin_src); 18922a952b03SJiong Wang } 18932a952b03SJiong Wang 1894254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1895254ef4d7SJiong Wang { 1896254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1897254ef4d7SJiong Wang 1898254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1899254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1900254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1901254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1902254ef4d7SJiong Wang 1903254ef4d7SJiong Wang return 0; 1904254ef4d7SJiong Wang } 1905254ef4d7SJiong Wang 1906991f5b36SJiong Wang /* Pseudo code: 1907991f5b36SJiong Wang * if shift_amt >= 32 1908991f5b36SJiong Wang * dst_high = dst_low << shift_amt[4:0] 1909991f5b36SJiong Wang * dst_low = 0; 1910991f5b36SJiong Wang * else 1911991f5b36SJiong Wang * dst_high = (dst_high, dst_low) >> (32 - shift_amt) 1912991f5b36SJiong Wang * dst_low = dst_low << shift_amt 1913991f5b36SJiong Wang * 1914991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1915991f5b36SJiong Wang */ 1916991f5b36SJiong Wang static int __shl_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1917991f5b36SJiong Wang { 1918991f5b36SJiong Wang if (shift_amt < 32) { 1919991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), 1920991f5b36SJiong Wang SHF_OP_NONE, reg_b(dst), SHF_SC_R_DSHF, 1921991f5b36SJiong Wang 32 - shift_amt); 1922991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1923991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 1924991f5b36SJiong Wang } else if (shift_amt == 32) { 1925991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst + 1, dst); 1926991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1927991f5b36SJiong Wang } else if (shift_amt > 32) { 1928991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1929991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt - 32); 1930991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1931991f5b36SJiong Wang } 1932991f5b36SJiong Wang 1933991f5b36SJiong Wang return 0; 1934991f5b36SJiong Wang } 1935991f5b36SJiong Wang 1936d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1937d9ae7f2bSJakub Kicinski { 1938d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 19393cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 1940d9ae7f2bSJakub Kicinski 1941991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, insn->imm); 1942991f5b36SJiong Wang } 1943991f5b36SJiong Wang 1944991f5b36SJiong Wang static void shl_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1945991f5b36SJiong Wang { 1946991f5b36SJiong Wang emit_alu(nfp_prog, imm_both(nfp_prog), reg_imm(32), ALU_OP_SUB, 1947991f5b36SJiong Wang reg_b(src)); 1948991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, reg_imm(0)); 1949991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), SHF_OP_NONE, 1950991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 1951991f5b36SJiong Wang } 1952991f5b36SJiong Wang 1953991f5b36SJiong Wang /* NOTE: for indirect left shift, HIGH part should be calculated first. */ 1954991f5b36SJiong Wang static void shl_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1955991f5b36SJiong Wang { 1956991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1957991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1958991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 1959991f5b36SJiong Wang } 1960991f5b36SJiong Wang 1961991f5b36SJiong Wang static void shl_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1962991f5b36SJiong Wang { 1963991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 1964991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 1965991f5b36SJiong Wang } 1966991f5b36SJiong Wang 1967991f5b36SJiong Wang static void shl_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 1968991f5b36SJiong Wang { 1969991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 1970991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1971991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 19723cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1973991f5b36SJiong Wang } 1974991f5b36SJiong Wang 1975991f5b36SJiong Wang static int shl_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1976991f5b36SJiong Wang { 1977991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 1978991f5b36SJiong Wang u64 umin, umax; 1979991f5b36SJiong Wang u8 dst, src; 1980991f5b36SJiong Wang 1981991f5b36SJiong Wang dst = insn->dst_reg * 2; 1982662c5472SJiong Wang umin = meta->umin_src; 1983662c5472SJiong Wang umax = meta->umax_src; 1984991f5b36SJiong Wang if (umin == umax) 1985991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, umin); 1986991f5b36SJiong Wang 1987991f5b36SJiong Wang src = insn->src_reg * 2; 1988991f5b36SJiong Wang if (umax < 32) { 1989991f5b36SJiong Wang shl_reg64_lt32(nfp_prog, dst, src); 1990991f5b36SJiong Wang } else if (umin >= 32) { 1991991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 1992991f5b36SJiong Wang } else { 1993991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 1994991f5b36SJiong Wang * value of shift amount. 1995991f5b36SJiong Wang */ 1996991f5b36SJiong Wang u16 label_ge32, label_end; 1997991f5b36SJiong Wang 1998991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 7; 1999991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2000991f5b36SJiong Wang 2001991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 2002991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2003991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2004991f5b36SJiong Wang /* shl_reg64_lt32_low packed in delay slot. */ 2005991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2006991f5b36SJiong Wang 2007991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2008991f5b36SJiong Wang return -EINVAL; 2009991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 2010991f5b36SJiong Wang 2011991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2012991f5b36SJiong Wang return -EINVAL; 2013991f5b36SJiong Wang } 2014991f5b36SJiong Wang 2015991f5b36SJiong Wang return 0; 2016991f5b36SJiong Wang } 2017991f5b36SJiong Wang 2018991f5b36SJiong Wang /* Pseudo code: 2019991f5b36SJiong Wang * if shift_amt >= 32 2020991f5b36SJiong Wang * dst_high = 0; 2021991f5b36SJiong Wang * dst_low = dst_high >> shift_amt[4:0] 2022991f5b36SJiong Wang * else 2023991f5b36SJiong Wang * dst_high = dst_high >> shift_amt 2024991f5b36SJiong Wang * dst_low = (dst_high, dst_low) >> shift_amt 2025991f5b36SJiong Wang * 2026991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 2027991f5b36SJiong Wang */ 2028991f5b36SJiong Wang static int __shr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2029991f5b36SJiong Wang { 2030991f5b36SJiong Wang if (shift_amt < 32) { 2031991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2032991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2033991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2034991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2035991f5b36SJiong Wang } else if (shift_amt == 32) { 2036991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2037991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2038991f5b36SJiong Wang } else if (shift_amt > 32) { 2039991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2040991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2041991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 20423cae1319SJakub Kicinski } 2043d9ae7f2bSJakub Kicinski 2044d9ae7f2bSJakub Kicinski return 0; 2045d9ae7f2bSJakub Kicinski } 2046d9ae7f2bSJakub Kicinski 2047d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2048d9ae7f2bSJakub Kicinski { 2049d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 20503cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 2051d9ae7f2bSJakub Kicinski 2052991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, insn->imm); 2053991f5b36SJiong Wang } 2054991f5b36SJiong Wang 2055991f5b36SJiong Wang /* NOTE: for indirect right shift, LOW part should be calculated first. */ 2056991f5b36SJiong Wang static void shr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2057991f5b36SJiong Wang { 2058991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2059991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2060991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2061991f5b36SJiong Wang } 2062991f5b36SJiong Wang 2063991f5b36SJiong Wang static void shr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2064991f5b36SJiong Wang { 2065991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2066991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2067991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 2068991f5b36SJiong Wang } 2069991f5b36SJiong Wang 2070991f5b36SJiong Wang static void shr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2071991f5b36SJiong Wang { 2072991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2073991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2074991f5b36SJiong Wang } 2075991f5b36SJiong Wang 2076991f5b36SJiong Wang static void shr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2077991f5b36SJiong Wang { 2078991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2079991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2080991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 20813cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2082991f5b36SJiong Wang } 2083991f5b36SJiong Wang 2084991f5b36SJiong Wang static int shr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2085991f5b36SJiong Wang { 2086991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2087991f5b36SJiong Wang u64 umin, umax; 2088991f5b36SJiong Wang u8 dst, src; 2089991f5b36SJiong Wang 2090991f5b36SJiong Wang dst = insn->dst_reg * 2; 2091662c5472SJiong Wang umin = meta->umin_src; 2092662c5472SJiong Wang umax = meta->umax_src; 2093991f5b36SJiong Wang if (umin == umax) 2094991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, umin); 2095991f5b36SJiong Wang 2096991f5b36SJiong Wang src = insn->src_reg * 2; 2097991f5b36SJiong Wang if (umax < 32) { 2098991f5b36SJiong Wang shr_reg64_lt32(nfp_prog, dst, src); 2099991f5b36SJiong Wang } else if (umin >= 32) { 2100991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2101991f5b36SJiong Wang } else { 2102991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2103991f5b36SJiong Wang * value of shift amount. 2104991f5b36SJiong Wang */ 2105991f5b36SJiong Wang u16 label_ge32, label_end; 2106991f5b36SJiong Wang 2107991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2108991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2109991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2110991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2111991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2112991f5b36SJiong Wang /* shr_reg64_lt32_high packed in delay slot. */ 2113991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2114991f5b36SJiong Wang 2115991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2116991f5b36SJiong Wang return -EINVAL; 2117991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2118991f5b36SJiong Wang 2119991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2120991f5b36SJiong Wang return -EINVAL; 21213cae1319SJakub Kicinski } 2122d9ae7f2bSJakub Kicinski 2123d9ae7f2bSJakub Kicinski return 0; 2124d9ae7f2bSJakub Kicinski } 2125d9ae7f2bSJakub Kicinski 2126f43d0f17SJiong Wang /* Code logic is the same as __shr_imm64 except ashr requires signedness bit 2127f43d0f17SJiong Wang * told through PREV_ALU result. 2128f43d0f17SJiong Wang */ 2129c217abccSJiong Wang static int __ashr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2130c217abccSJiong Wang { 2131c217abccSJiong Wang if (shift_amt < 32) { 2132c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2133c217abccSJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2134c217abccSJiong Wang /* Set signedness bit. */ 2135c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2136c217abccSJiong Wang reg_imm(0)); 2137c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2138c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2139c217abccSJiong Wang } else if (shift_amt == 32) { 2140c217abccSJiong Wang /* NOTE: this also helps setting signedness bit. */ 2141c217abccSJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2142c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2143c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2144c217abccSJiong Wang } else if (shift_amt > 32) { 2145c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2146c217abccSJiong Wang reg_imm(0)); 2147c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2148c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2149c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2150c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2151c217abccSJiong Wang } 2152c217abccSJiong Wang 2153c217abccSJiong Wang return 0; 2154c217abccSJiong Wang } 2155c217abccSJiong Wang 2156f43d0f17SJiong Wang static int ashr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2157f43d0f17SJiong Wang { 2158f43d0f17SJiong Wang const struct bpf_insn *insn = &meta->insn; 2159f43d0f17SJiong Wang u8 dst = insn->dst_reg * 2; 2160f43d0f17SJiong Wang 2161c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, insn->imm); 2162c217abccSJiong Wang } 2163c217abccSJiong Wang 2164c217abccSJiong Wang static void ashr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2165c217abccSJiong Wang { 2166c217abccSJiong Wang /* NOTE: the first insn will set both indirect shift amount (source A) 2167c217abccSJiong Wang * and signedness bit (MSB of result). 2168c217abccSJiong Wang */ 2169c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2170c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2171c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2172c217abccSJiong Wang } 2173c217abccSJiong Wang 2174c217abccSJiong Wang static void ashr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2175c217abccSJiong Wang { 2176c217abccSJiong Wang /* NOTE: it is the same as logic shift because we don't need to shift in 2177c217abccSJiong Wang * signedness bit when the shift amount is less than 32. 2178c217abccSJiong Wang */ 2179c217abccSJiong Wang return shr_reg64_lt32_low(nfp_prog, dst, src); 2180c217abccSJiong Wang } 2181c217abccSJiong Wang 2182c217abccSJiong Wang static void ashr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2183c217abccSJiong Wang { 2184c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2185c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2186c217abccSJiong Wang } 2187c217abccSJiong Wang 2188c217abccSJiong Wang static void ashr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2189c217abccSJiong Wang { 2190c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2191c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2192c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2193f43d0f17SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2194f43d0f17SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2195c217abccSJiong Wang } 2196c217abccSJiong Wang 2197c217abccSJiong Wang /* Like ashr_imm64, but need to use indirect shift. */ 2198c217abccSJiong Wang static int ashr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2199c217abccSJiong Wang { 2200c217abccSJiong Wang const struct bpf_insn *insn = &meta->insn; 2201c217abccSJiong Wang u64 umin, umax; 2202c217abccSJiong Wang u8 dst, src; 2203c217abccSJiong Wang 2204c217abccSJiong Wang dst = insn->dst_reg * 2; 2205662c5472SJiong Wang umin = meta->umin_src; 2206662c5472SJiong Wang umax = meta->umax_src; 2207c217abccSJiong Wang if (umin == umax) 2208c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, umin); 2209c217abccSJiong Wang 2210c217abccSJiong Wang src = insn->src_reg * 2; 2211c217abccSJiong Wang if (umax < 32) { 2212c217abccSJiong Wang ashr_reg64_lt32(nfp_prog, dst, src); 2213c217abccSJiong Wang } else if (umin >= 32) { 2214c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2215c217abccSJiong Wang } else { 2216c217abccSJiong Wang u16 label_ge32, label_end; 2217c217abccSJiong Wang 2218c217abccSJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2219c217abccSJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2220c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2221c217abccSJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2222c217abccSJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2223c217abccSJiong Wang /* ashr_reg64_lt32_high packed in delay slot. */ 2224c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2225c217abccSJiong Wang 2226c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2227c217abccSJiong Wang return -EINVAL; 2228c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2229c217abccSJiong Wang 2230c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2231c217abccSJiong Wang return -EINVAL; 2232f43d0f17SJiong Wang } 2233f43d0f17SJiong Wang 2234f43d0f17SJiong Wang return 0; 2235f43d0f17SJiong Wang } 2236f43d0f17SJiong Wang 2237d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2238d9ae7f2bSJakub Kicinski { 2239d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2240d9ae7f2bSJakub Kicinski 2241d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 2242d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2243d9ae7f2bSJakub Kicinski 2244d9ae7f2bSJakub Kicinski return 0; 2245d9ae7f2bSJakub Kicinski } 2246d9ae7f2bSJakub Kicinski 2247d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2248d9ae7f2bSJakub Kicinski { 2249d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2250d9ae7f2bSJakub Kicinski 2251d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 2252d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2253d9ae7f2bSJakub Kicinski 2254d9ae7f2bSJakub Kicinski return 0; 2255d9ae7f2bSJakub Kicinski } 2256d9ae7f2bSJakub Kicinski 2257d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2258d9ae7f2bSJakub Kicinski { 2259d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 2260d9ae7f2bSJakub Kicinski } 2261d9ae7f2bSJakub Kicinski 2262d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2263d9ae7f2bSJakub Kicinski { 2264d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 2265d9ae7f2bSJakub Kicinski } 2266d9ae7f2bSJakub Kicinski 2267d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2268d9ae7f2bSJakub Kicinski { 2269d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 2270d9ae7f2bSJakub Kicinski } 2271d9ae7f2bSJakub Kicinski 2272d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2273d9ae7f2bSJakub Kicinski { 2274d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 2275d9ae7f2bSJakub Kicinski } 2276d9ae7f2bSJakub Kicinski 2277d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2278d9ae7f2bSJakub Kicinski { 2279d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 2280d9ae7f2bSJakub Kicinski } 2281d9ae7f2bSJakub Kicinski 2282d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2283d9ae7f2bSJakub Kicinski { 2284d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 2285d9ae7f2bSJakub Kicinski } 2286d9ae7f2bSJakub Kicinski 2287d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2288d9ae7f2bSJakub Kicinski { 2289d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 2290d9ae7f2bSJakub Kicinski } 2291d9ae7f2bSJakub Kicinski 2292d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2293d9ae7f2bSJakub Kicinski { 2294d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 2295d9ae7f2bSJakub Kicinski } 2296d9ae7f2bSJakub Kicinski 2297d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2298d9ae7f2bSJakub Kicinski { 2299d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 2300d9ae7f2bSJakub Kicinski } 2301d9ae7f2bSJakub Kicinski 2302d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2303d9ae7f2bSJakub Kicinski { 2304d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 2305d9ae7f2bSJakub Kicinski } 2306d9ae7f2bSJakub Kicinski 2307d3d23fdbSJiong Wang static int mul_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2308d3d23fdbSJiong Wang { 2309d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, true); 2310d3d23fdbSJiong Wang } 2311d3d23fdbSJiong Wang 2312d3d23fdbSJiong Wang static int mul_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2313d3d23fdbSJiong Wang { 2314d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, false); 2315d3d23fdbSJiong Wang } 2316d3d23fdbSJiong Wang 23172a952b03SJiong Wang static int div_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23182a952b03SJiong Wang { 23192a952b03SJiong Wang return div_reg64(nfp_prog, meta); 23202a952b03SJiong Wang } 23212a952b03SJiong Wang 23222a952b03SJiong Wang static int div_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23232a952b03SJiong Wang { 23242a952b03SJiong Wang return div_imm64(nfp_prog, meta); 23252a952b03SJiong Wang } 23262a952b03SJiong Wang 2327254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2328254ef4d7SJiong Wang { 2329254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 2330254ef4d7SJiong Wang 2331254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 2332254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2333254ef4d7SJiong Wang 2334254ef4d7SJiong Wang return 0; 2335254ef4d7SJiong Wang } 2336254ef4d7SJiong Wang 2337d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2338d9ae7f2bSJakub Kicinski { 2339d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2340d9ae7f2bSJakub Kicinski 2341d9ae7f2bSJakub Kicinski if (!insn->imm) 2342d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 2343d9ae7f2bSJakub Kicinski 2344d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 2345d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 2346d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 2347d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2348d9ae7f2bSJakub Kicinski 2349d9ae7f2bSJakub Kicinski return 0; 2350d9ae7f2bSJakub Kicinski } 2351d9ae7f2bSJakub Kicinski 23523119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23533119d1fdSJakub Kicinski { 23543119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 23553119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 23563119d1fdSJakub Kicinski 23573119d1fdSJakub Kicinski switch (insn->imm) { 23583119d1fdSJakub Kicinski case 16: 23593119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 23603119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 23613119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 23623119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 23633119d1fdSJakub Kicinski 23643119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 23653119d1fdSJakub Kicinski break; 23663119d1fdSJakub Kicinski case 32: 23673119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 23683119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 23693119d1fdSJakub Kicinski break; 23703119d1fdSJakub Kicinski case 64: 23713119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 23723119d1fdSJakub Kicinski 23733119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 23743119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 23753119d1fdSJakub Kicinski break; 23763119d1fdSJakub Kicinski } 23773119d1fdSJakub Kicinski 23783119d1fdSJakub Kicinski return 0; 23793119d1fdSJakub Kicinski } 23803119d1fdSJakub Kicinski 2381d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2382d9ae7f2bSJakub Kicinski { 23839f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 23849f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 23859f16c8abSJakub Kicinski u8 dst; 23869f16c8abSJakub Kicinski 23879f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 23889f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 23899f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 23909f16c8abSJakub Kicinski 23919f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 23929f16c8abSJakub Kicinski 23939f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 23949f16c8abSJakub Kicinski if (imm_hi == imm_lo) 23959f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 23969f16c8abSJakub Kicinski else 23979f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 2398d9ae7f2bSJakub Kicinski 2399d9ae7f2bSJakub Kicinski return 0; 2400d9ae7f2bSJakub Kicinski } 2401d9ae7f2bSJakub Kicinski 2402d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2403d9ae7f2bSJakub Kicinski { 2404d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 2405d9ae7f2bSJakub Kicinski return 0; 2406d9ae7f2bSJakub Kicinski } 2407d9ae7f2bSJakub Kicinski 2408d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2409d9ae7f2bSJakub Kicinski { 2410d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 2411d9ae7f2bSJakub Kicinski } 2412d9ae7f2bSJakub Kicinski 2413d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2414d9ae7f2bSJakub Kicinski { 2415d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 2416d9ae7f2bSJakub Kicinski } 2417d9ae7f2bSJakub Kicinski 2418d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2419d9ae7f2bSJakub Kicinski { 2420d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 2421d9ae7f2bSJakub Kicinski } 2422d9ae7f2bSJakub Kicinski 2423d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2424d9ae7f2bSJakub Kicinski { 2425d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 24260a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 2427d9ae7f2bSJakub Kicinski } 2428d9ae7f2bSJakub Kicinski 2429d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2430d9ae7f2bSJakub Kicinski { 2431d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 24320a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 2433d9ae7f2bSJakub Kicinski } 2434d9ae7f2bSJakub Kicinski 2435d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2436d9ae7f2bSJakub Kicinski { 2437d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 24380a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 2439d9ae7f2bSJakub Kicinski } 2440d9ae7f2bSJakub Kicinski 2441a82b23fbSJakub Kicinski static int 2442a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2443d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2444a82b23fbSJakub Kicinski { 2445d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2446b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 2447b14157eeSJakub Kicinski true, wrp_lmem_load); 2448a82b23fbSJakub Kicinski } 2449a82b23fbSJakub Kicinski 2450943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2451943c57b9SJakub Kicinski u8 size) 2452d9ae7f2bSJakub Kicinski { 2453bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2454bfddbc8aSJakub Kicinski 2455943c57b9SJakub Kicinski switch (meta->insn.off) { 2456c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 2457c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 2458943c57b9SJakub Kicinski return -EOPNOTSUPP; 2459bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 2460bfddbc8aSJakub Kicinski break; 2461c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 2462c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 2463bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2464bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2465bfddbc8aSJakub Kicinski break; 2466c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 2467c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 2468bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2469bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 2470bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2471943c57b9SJakub Kicinski break; 2472943c57b9SJakub Kicinski default: 2473d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2474943c57b9SJakub Kicinski } 2475943c57b9SJakub Kicinski 2476943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2477d9ae7f2bSJakub Kicinski 2478d9ae7f2bSJakub Kicinski return 0; 2479d9ae7f2bSJakub Kicinski } 2480d9ae7f2bSJakub Kicinski 2481943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2482943c57b9SJakub Kicinski u8 size) 2483d9ae7f2bSJakub Kicinski { 2484b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2485d9ae7f2bSJakub Kicinski 2486943c57b9SJakub Kicinski switch (meta->insn.off) { 2487c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 2488c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 2489c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2490c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2491943c57b9SJakub Kicinski break; 2492c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 2493c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 2494c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2495943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 2496943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2497943c57b9SJakub Kicinski break; 2498943c57b9SJakub Kicinski default: 2499943c57b9SJakub Kicinski return -EOPNOTSUPP; 2500943c57b9SJakub Kicinski } 2501d9ae7f2bSJakub Kicinski 2502943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2503d9ae7f2bSJakub Kicinski 2504d9ae7f2bSJakub Kicinski return 0; 2505d9ae7f2bSJakub Kicinski } 2506d9ae7f2bSJakub Kicinski 25072ca71441SJakub Kicinski static int 25082ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 25092ca71441SJakub Kicinski unsigned int size) 25102ca71441SJakub Kicinski { 25112ca71441SJakub Kicinski swreg tmp_reg; 25122ca71441SJakub Kicinski 25132ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 25142ca71441SJakub Kicinski 25153dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 25163dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 25173dd43c33SJakub Kicinski } 25183dd43c33SJakub Kicinski 25193dd43c33SJakub Kicinski static int 25203dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 25213dd43c33SJakub Kicinski unsigned int size) 25223dd43c33SJakub Kicinski { 25233dd43c33SJakub Kicinski swreg tmp_reg; 25243dd43c33SJakub Kicinski 25253dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 25263dd43c33SJakub Kicinski 25273dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 25283dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 25292ca71441SJakub Kicinski } 25302ca71441SJakub Kicinski 2531be759237SJiong Wang static void 2532be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 2533be759237SJiong Wang struct nfp_insn_meta *meta) 2534be759237SJiong Wang { 2535be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 2536be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 2537be759237SJiong Wang swreg src_base, off; 2538be759237SJiong Wang u8 xfer_num, len; 2539be759237SJiong Wang bool indir; 2540be759237SJiong Wang 2541be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 2542be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 2543be759237SJiong Wang len = range_end - range_start; 2544be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 2545be759237SJiong Wang 2546be759237SJiong Wang indir = len > 8 * REG_WIDTH; 2547be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 2548be759237SJiong Wang if (indir) 2549be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 2550be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 2551be759237SJiong Wang 2552be759237SJiong Wang /* Cache memory into transfer-in registers. */ 2553be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 2554b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 2555be759237SJiong Wang } 2556be759237SJiong Wang 2557be759237SJiong Wang static int 255891ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 255991ff69e8SJiong Wang struct nfp_insn_meta *meta, 256091ff69e8SJiong Wang unsigned int size) 256191ff69e8SJiong Wang { 256291ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 256391ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 256491ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 256591ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 256691ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 256791ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 256891ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 256991ff69e8SJiong Wang 257091ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 257191ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 257291ff69e8SJiong Wang src_lo = reg_xfer(idx); 257391ff69e8SJiong Wang 257491ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 257591ff69e8SJiong Wang if (size > REG_WIDTH - off) { 257691ff69e8SJiong Wang /* Calculate the part in the second register. */ 257791ff69e8SJiong Wang len_lo = REG_WIDTH - off; 257891ff69e8SJiong Wang len_mid = size - len_lo; 257991ff69e8SJiong Wang 258091ff69e8SJiong Wang /* Calculate the part in the third register. */ 258191ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 258291ff69e8SJiong Wang len_mid = REG_WIDTH; 258391ff69e8SJiong Wang } 258491ff69e8SJiong Wang 258591ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 258691ff69e8SJiong Wang 258791ff69e8SJiong Wang if (!len_mid) { 258891ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 258991ff69e8SJiong Wang return 0; 259091ff69e8SJiong Wang } 259191ff69e8SJiong Wang 259291ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 259391ff69e8SJiong Wang 259491ff69e8SJiong Wang if (size <= REG_WIDTH) { 259591ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 259691ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 259791ff69e8SJiong Wang } else { 259891ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 259991ff69e8SJiong Wang 260091ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 260191ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 260291ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 260391ff69e8SJiong Wang REG_WIDTH - len_lo); 260491ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 260591ff69e8SJiong Wang len_lo); 260691ff69e8SJiong Wang } 260791ff69e8SJiong Wang 260891ff69e8SJiong Wang return 0; 260991ff69e8SJiong Wang } 261091ff69e8SJiong Wang 261191ff69e8SJiong Wang static int 2612be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 2613be759237SJiong Wang struct nfp_insn_meta *meta, 2614be759237SJiong Wang unsigned int size) 2615be759237SJiong Wang { 2616be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 2617be759237SJiong Wang u8 dst_gpr, idx; 2618be759237SJiong Wang 2619be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 2620be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 2621be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 2622be759237SJiong Wang dst_lo = reg_both(dst_gpr); 2623be759237SJiong Wang src_lo = reg_xfer(idx); 2624be759237SJiong Wang 2625be759237SJiong Wang if (size < REG_WIDTH) { 2626be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 2627be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2628be759237SJiong Wang } else if (size == REG_WIDTH) { 2629be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2630be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2631be759237SJiong Wang } else { 2632be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 2633be759237SJiong Wang 2634be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2635be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 2636be759237SJiong Wang } 2637be759237SJiong Wang 2638be759237SJiong Wang return 0; 2639be759237SJiong Wang } 2640be759237SJiong Wang 2641be759237SJiong Wang static int 2642be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 2643be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 2644be759237SJiong Wang { 2645be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 2646be759237SJiong Wang 264791ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 2648be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 264991ff69e8SJiong Wang 265091ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 2651be759237SJiong Wang } 2652be759237SJiong Wang 26532ca71441SJakub Kicinski static int 26542ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 26552ca71441SJakub Kicinski unsigned int size) 26562ca71441SJakub Kicinski { 26579879a381SJiong Wang if (meta->ldst_gather_len) 26589879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 26599879a381SJiong Wang 26602ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2661012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 26622ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 26632ca71441SJakub Kicinski else 26642ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 26652ca71441SJakub Kicinski } 26662ca71441SJakub Kicinski 2667be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2668be759237SJiong Wang if (meta->pkt_cache.range_end) { 2669be759237SJiong Wang if (meta->pkt_cache.do_init) 2670be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2671be759237SJiong Wang 2672be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2673be759237SJiong Wang } else { 26742ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2675be759237SJiong Wang } 2676be759237SJiong Wang } 26772ca71441SJakub Kicinski 2678a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2679d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2680d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2681a82b23fbSJakub Kicinski 26823dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 26833dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 26843dd43c33SJakub Kicinski 26852ca71441SJakub Kicinski return -EOPNOTSUPP; 26862ca71441SJakub Kicinski } 26872ca71441SJakub Kicinski 26882ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 26892ca71441SJakub Kicinski { 26902ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 26912ca71441SJakub Kicinski } 26922ca71441SJakub Kicinski 26932ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 26942ca71441SJakub Kicinski { 26952ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 26962ca71441SJakub Kicinski } 26972ca71441SJakub Kicinski 2698d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2699d9ae7f2bSJakub Kicinski { 27002ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 27012ca71441SJakub Kicinski } 27022ca71441SJakub Kicinski 27032ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 27042ca71441SJakub Kicinski { 27052ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2706d9ae7f2bSJakub Kicinski } 2707d9ae7f2bSJakub Kicinski 2708e663fe38SJakub Kicinski static int 2709e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2710e663fe38SJakub Kicinski unsigned int size) 2711d9ae7f2bSJakub Kicinski { 2712e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2713e663fe38SJakub Kicinski swreg off_reg; 2714e663fe38SJakub Kicinski 2715e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2716e663fe38SJakub Kicinski 2717e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2718e663fe38SJakub Kicinski imm, size); 2719e663fe38SJakub Kicinski } 2720e663fe38SJakub Kicinski 2721e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2722e663fe38SJakub Kicinski unsigned int size) 2723e663fe38SJakub Kicinski { 2724e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2725e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2726e663fe38SJakub Kicinski 2727d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2728d9ae7f2bSJakub Kicinski } 2729d9ae7f2bSJakub Kicinski 2730e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2731d9ae7f2bSJakub Kicinski { 2732e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2733e663fe38SJakub Kicinski } 2734e663fe38SJakub Kicinski 2735e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2736e663fe38SJakub Kicinski { 2737e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2738e663fe38SJakub Kicinski } 2739e663fe38SJakub Kicinski 2740e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2741e663fe38SJakub Kicinski { 2742e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2743e663fe38SJakub Kicinski } 2744e663fe38SJakub Kicinski 2745e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2746e663fe38SJakub Kicinski { 2747e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2748e663fe38SJakub Kicinski } 2749e663fe38SJakub Kicinski 2750e663fe38SJakub Kicinski static int 2751e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2752e663fe38SJakub Kicinski unsigned int size) 2753e663fe38SJakub Kicinski { 2754e663fe38SJakub Kicinski swreg off_reg; 2755e663fe38SJakub Kicinski 2756e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2757e663fe38SJakub Kicinski 2758e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2759e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2760e663fe38SJakub Kicinski } 2761e663fe38SJakub Kicinski 2762e663fe38SJakub Kicinski static int 2763ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2764d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2765ee9133a8SJakub Kicinski { 2766d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2767b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2768b14157eeSJakub Kicinski false, wrp_lmem_store); 2769ee9133a8SJakub Kicinski } 2770ee9133a8SJakub Kicinski 2771d985888fSJakub Kicinski static int mem_stx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2772d985888fSJakub Kicinski { 2773d985888fSJakub Kicinski switch (meta->insn.off) { 2774d985888fSJakub Kicinski case offsetof(struct xdp_md, rx_queue_index): 2775d985888fSJakub Kicinski return nfp_queue_select(nfp_prog, meta); 2776d985888fSJakub Kicinski } 2777d985888fSJakub Kicinski 2778d985888fSJakub Kicinski WARN_ON_ONCE(1); /* verifier should have rejected bad accesses */ 2779d985888fSJakub Kicinski return -EOPNOTSUPP; 2780d985888fSJakub Kicinski } 2781d985888fSJakub Kicinski 2782ee9133a8SJakub Kicinski static int 2783e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2784e663fe38SJakub Kicinski unsigned int size) 2785e663fe38SJakub Kicinski { 2786e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2787e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2788e663fe38SJakub Kicinski 2789ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2790d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2791d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2792ee9133a8SJakub Kicinski 2793d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2794d9ae7f2bSJakub Kicinski } 2795d9ae7f2bSJakub Kicinski 2796e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2797e663fe38SJakub Kicinski { 2798e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2799e663fe38SJakub Kicinski } 2800e663fe38SJakub Kicinski 2801e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2802e663fe38SJakub Kicinski { 2803e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2804e663fe38SJakub Kicinski } 2805e663fe38SJakub Kicinski 2806d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2807d9ae7f2bSJakub Kicinski { 2808d985888fSJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) 2809d985888fSJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 2810d985888fSJakub Kicinski return mem_stx_xdp(nfp_prog, meta); 2811e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2812e663fe38SJakub Kicinski } 28132ca71441SJakub Kicinski 2814e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2815e663fe38SJakub Kicinski { 2816e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2817d9ae7f2bSJakub Kicinski } 2818d9ae7f2bSJakub Kicinski 2819dcb0c27fSJakub Kicinski static int 2820dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2821dcb0c27fSJakub Kicinski { 2822dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2823dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 282441aed09cSJakub Kicinski unsigned int full_add, out; 282541aed09cSJakub Kicinski swreg addra, addrb, off; 2826dcb0c27fSJakub Kicinski 2827dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2828dcb0c27fSJakub Kicinski 282941aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 283041aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 283141aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 283241aed09cSJakub Kicinski * code for both. 283341aed09cSJakub Kicinski */ 283441aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 283541aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 283641aed09cSJakub Kicinski 283741aed09cSJakub Kicinski if (meta->insn.off) { 283841aed09cSJakub Kicinski out += 2; 283941aed09cSJakub Kicinski full_add += 2; 284041aed09cSJakub Kicinski } 284141aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 284241aed09cSJakub Kicinski out += 3; 284341aed09cSJakub Kicinski full_add += 3; 284441aed09cSJakub Kicinski } 284541aed09cSJakub Kicinski if (meta->xadd_over_16bit) 284641aed09cSJakub Kicinski out += 2 + is64; 284741aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 284841aed09cSJakub Kicinski out += 5; 284941aed09cSJakub Kicinski full_add += 5; 285041aed09cSJakub Kicinski } 285141aed09cSJakub Kicinski 285241aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 285341aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 285441aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 285541aed09cSJakub Kicinski 285641aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 285741aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 285841aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 285941aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 286041aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 286141aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 286241aed09cSJakub Kicinski /* defer for add */ 286341aed09cSJakub Kicinski } 286441aed09cSJakub Kicinski 2865dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2866dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2867dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2868dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2869dcb0c27fSJakub Kicinski } else { 2870dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2871dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2872dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2873dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2874dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2875dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2876dcb0c27fSJakub Kicinski } 2877dcb0c27fSJakub Kicinski 287841aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 287941aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 288041aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 288141aed09cSJakub Kicinski 2882dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2883dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2884dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2885dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2886dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2887dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2888b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2889dcb0c27fSJakub Kicinski 289041aed09cSJakub Kicinski if (meta->xadd_over_16bit) 289141aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 289241aed09cSJakub Kicinski } 289341aed09cSJakub Kicinski 289441aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 289541aed09cSJakub Kicinski return -EINVAL; 289641aed09cSJakub Kicinski 289741aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 289841aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 289941aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 290041aed09cSJakub Kicinski addra, addrb, is64 << 2, 290141aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 290241aed09cSJakub Kicinski 290341aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 290441aed09cSJakub Kicinski if (is64) 290541aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 290641aed09cSJakub Kicinski } 290741aed09cSJakub Kicinski 290841aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 290941aed09cSJakub Kicinski return -EINVAL; 291041aed09cSJakub Kicinski 2911dcb0c27fSJakub Kicinski return 0; 2912dcb0c27fSJakub Kicinski } 2913dcb0c27fSJakub Kicinski 2914dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2915dcb0c27fSJakub Kicinski { 2916dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2917dcb0c27fSJakub Kicinski } 2918dcb0c27fSJakub Kicinski 2919dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2920dcb0c27fSJakub Kicinski { 2921dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2922dcb0c27fSJakub Kicinski } 2923dcb0c27fSJakub Kicinski 2924d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2925d9ae7f2bSJakub Kicinski { 2926d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 2927d9ae7f2bSJakub Kicinski 2928d9ae7f2bSJakub Kicinski return 0; 2929d9ae7f2bSJakub Kicinski } 2930d9ae7f2bSJakub Kicinski 2931d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2932d9ae7f2bSJakub Kicinski { 2933d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2934d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2935b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 2936b3f868dfSJakub Kicinski 2937b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 2938b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 2939d9ae7f2bSJakub Kicinski 2940d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2941d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2942d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 2943d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 2944d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 2945d9ae7f2bSJakub Kicinski } 2946d9ae7f2bSJakub Kicinski 2947d9ae7f2bSJakub Kicinski if (imm >> 32) { 2948d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2949d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 2950d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 2951d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 2952d9ae7f2bSJakub Kicinski } 2953d9ae7f2bSJakub Kicinski 2954d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 2955d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 2956d9ae7f2bSJakub Kicinski 2957d9ae7f2bSJakub Kicinski return 0; 2958d9ae7f2bSJakub Kicinski } 2959d9ae7f2bSJakub Kicinski 2960d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2961d9ae7f2bSJakub Kicinski { 2962d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2963d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2964b3f868dfSJakub Kicinski swreg tmp_reg; 2965d9ae7f2bSJakub Kicinski 2966d9ae7f2bSJakub Kicinski if (!imm) { 2967d9ae7f2bSJakub Kicinski meta->skip = true; 2968d9ae7f2bSJakub Kicinski return 0; 2969d9ae7f2bSJakub Kicinski } 2970d9ae7f2bSJakub Kicinski 2971d9ae7f2bSJakub Kicinski if (imm & ~0U) { 2972d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 2973d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2974d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 2975d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2976d9ae7f2bSJakub Kicinski } 2977d9ae7f2bSJakub Kicinski 2978d9ae7f2bSJakub Kicinski if (imm >> 32) { 2979d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 2980d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 2981d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 2982d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 2983d9ae7f2bSJakub Kicinski } 2984d9ae7f2bSJakub Kicinski 2985d9ae7f2bSJakub Kicinski return 0; 2986d9ae7f2bSJakub Kicinski } 2987d9ae7f2bSJakub Kicinski 2988d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2989d9ae7f2bSJakub Kicinski { 2990d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2991d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 2992b3f868dfSJakub Kicinski swreg tmp_reg; 2993d9ae7f2bSJakub Kicinski 2994d9ae7f2bSJakub Kicinski if (!imm) { 2995d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 2996d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 2997d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 299882837370SJakub Kicinski return 0; 2999d9ae7f2bSJakub Kicinski } 3000d9ae7f2bSJakub Kicinski 3001d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3002d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3003d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 3004d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3005d9ae7f2bSJakub Kicinski 3006d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3007d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3008d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 3009d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3010d9ae7f2bSJakub Kicinski 3011d9ae7f2bSJakub Kicinski return 0; 3012d9ae7f2bSJakub Kicinski } 3013d9ae7f2bSJakub Kicinski 3014d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3015d9ae7f2bSJakub Kicinski { 3016d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3017d9ae7f2bSJakub Kicinski 3018d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 3019d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 3020d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 3021d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 3022d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3023d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 3024d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 3025d9ae7f2bSJakub Kicinski 3026d9ae7f2bSJakub Kicinski return 0; 3027d9ae7f2bSJakub Kicinski } 3028d9ae7f2bSJakub Kicinski 3029d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3030d9ae7f2bSJakub Kicinski { 3031d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 3032d9ae7f2bSJakub Kicinski } 3033d9ae7f2bSJakub Kicinski 3034d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3035d9ae7f2bSJakub Kicinski { 3036d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 3037d9ae7f2bSJakub Kicinski } 3038d9ae7f2bSJakub Kicinski 30392cb230bdSJakub Kicinski static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 30402cb230bdSJakub Kicinski { 30412cb230bdSJakub Kicinski switch (meta->insn.imm) { 30420d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 30430d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 304477a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 304544d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 3046bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3047fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 3048df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 3049df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 30509816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 30519816dd35SJakub Kicinski return nfp_perf_event_output(nfp_prog, meta); 30522cb230bdSJakub Kicinski default: 30532cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 30542cb230bdSJakub Kicinski return -EOPNOTSUPP; 30552cb230bdSJakub Kicinski } 30562cb230bdSJakub Kicinski } 30572cb230bdSJakub Kicinski 3058d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3059d9ae7f2bSJakub Kicinski { 3060e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 3061d9ae7f2bSJakub Kicinski 3062d9ae7f2bSJakub Kicinski return 0; 3063d9ae7f2bSJakub Kicinski } 3064d9ae7f2bSJakub Kicinski 3065d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 3066d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 3067d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 3068d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 3069d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 3070d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 3071d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 3072d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 3073d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 3074d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 3075d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 3076d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 3077d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 3078d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_X] = mul_reg64, 3079d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_K] = mul_imm64, 30802a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_X] = div_reg64, 30812a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_K] = div_imm64, 3082254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 3083991f5b36SJiong Wang [BPF_ALU64 | BPF_LSH | BPF_X] = shl_reg64, 3084d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 3085991f5b36SJiong Wang [BPF_ALU64 | BPF_RSH | BPF_X] = shr_reg64, 3086d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 3087c217abccSJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_X] = ashr_reg64, 3088f43d0f17SJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_K] = ashr_imm64, 3089d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 3090d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 3091d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 3092d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 3093d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 3094d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 3095d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 3096d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 3097d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 3098d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 3099d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 3100d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 3101d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_X] = mul_reg, 3102d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_K] = mul_imm, 31032a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_X] = div_reg, 31042a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_K] = div_imm, 3105254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 3106d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 31073119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 3108d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 3109d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 3110d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 3111d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 3112d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 3113d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 3114d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 31152ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 31162ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 3117d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 31182ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 3119e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 3120e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 3121d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 3122e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 3123dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 3124dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 3125e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 3126e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 3127e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 3128e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 3129d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 3130d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 313161dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = cmp_imm, 313261dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = cmp_imm, 313361dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_K] = cmp_imm, 313461dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_K] = cmp_imm, 313561dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_K] = cmp_imm, 313661dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_K] = cmp_imm, 313761dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_K] = cmp_imm, 313861dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_K] = cmp_imm, 3139d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 3140d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 3141d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 314261dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = cmp_reg, 314361dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = cmp_reg, 314461dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_X] = cmp_reg, 314561dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_X] = cmp_reg, 314661dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_X] = cmp_reg, 314761dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_X] = cmp_reg, 314861dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_X] = cmp_reg, 314961dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_X] = cmp_reg, 3150d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 3151d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 31522cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 3153d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_EXIT] = goto_out, 3154d9ae7f2bSJakub Kicinski }; 3155d9ae7f2bSJakub Kicinski 3156d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 3157d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 3158d9ae7f2bSJakub Kicinski { 31595b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 3160854dc87dSJiong Wang u32 idx, br_idx; 3161d9ae7f2bSJakub Kicinski 3162854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 3163d9ae7f2bSJakub Kicinski if (meta->skip) 3164d9ae7f2bSJakub Kicinski continue; 31652cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 31662cb230bdSJakub Kicinski continue; 3167d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 3168d9ae7f2bSJakub Kicinski continue; 3169d9ae7f2bSJakub Kicinski 31705b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 31712314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 31725b674140SJiong Wang else 31732314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 3174854dc87dSJiong Wang 3175d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 3176d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 3177d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 3178d9ae7f2bSJakub Kicinski return -ELOOP; 3179d9ae7f2bSJakub Kicinski } 3180d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 31812314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 31822314fe9eSJakub Kicinski RELO_BR_REL) 3183d9ae7f2bSJakub Kicinski continue; 3184d9ae7f2bSJakub Kicinski 31855b674140SJiong Wang if (!meta->jmp_dst) { 31865b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 3187d9ae7f2bSJakub Kicinski return -ELOOP; 3188d9ae7f2bSJakub Kicinski } 3189d9ae7f2bSJakub Kicinski 31905b674140SJiong Wang jmp_dst = meta->jmp_dst; 3191854dc87dSJiong Wang 31925b674140SJiong Wang if (jmp_dst->skip) { 3193d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 3194d9ae7f2bSJakub Kicinski return -ELOOP; 3195d9ae7f2bSJakub Kicinski } 3196d9ae7f2bSJakub Kicinski 31972314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 3198d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 3199d9ae7f2bSJakub Kicinski continue; 32005b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 3201d9ae7f2bSJakub Kicinski } 3202d9ae7f2bSJakub Kicinski } 3203d9ae7f2bSJakub Kicinski 3204d9ae7f2bSJakub Kicinski return 0; 3205d9ae7f2bSJakub Kicinski } 3206d9ae7f2bSJakub Kicinski 3207d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 3208d9ae7f2bSJakub Kicinski { 320918e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 321018e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 321118e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 3212d9ae7f2bSJakub Kicinski } 3213d9ae7f2bSJakub Kicinski 3214d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 3215d9ae7f2bSJakub Kicinski { 3216d9ae7f2bSJakub Kicinski /* TC direct-action mode: 3217d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 3218d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 3219d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 3220d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 3221d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 3222d9ae7f2bSJakub Kicinski * 3223d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 3224d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 3225d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 3226d9ae7f2bSJakub Kicinski * packets up the stack. 3227d9ae7f2bSJakub Kicinski */ 3228d9ae7f2bSJakub Kicinski /* Target for aborts */ 3229d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3230d9ae7f2bSJakub Kicinski 3231e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3232d9ae7f2bSJakub Kicinski 3233c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3234d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 3235d9ae7f2bSJakub Kicinski 3236d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3237d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3238d9ae7f2bSJakub Kicinski 3239d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 3240d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 3241d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3242c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3243d9ae7f2bSJakub Kicinski 3244d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 3245d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 3246d9ae7f2bSJakub Kicinski 3247d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3248d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 3249d9ae7f2bSJakub Kicinski 3250d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3251d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 3252d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3253d9ae7f2bSJakub Kicinski 3254d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3255d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3256d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 3257d9ae7f2bSJakub Kicinski 3258e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3259d9ae7f2bSJakub Kicinski 3260d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3261d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 3262d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3263d9ae7f2bSJakub Kicinski } 3264d9ae7f2bSJakub Kicinski 3265d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 3266d9ae7f2bSJakub Kicinski { 3267d9ae7f2bSJakub Kicinski /* XDP return codes: 3268d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 3269d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 3270d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 3271d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 3272d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 3273d9ae7f2bSJakub Kicinski */ 3274d9ae7f2bSJakub Kicinski /* Target for aborts */ 3275d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3276d9ae7f2bSJakub Kicinski 3277e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3278d9ae7f2bSJakub Kicinski 3279c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3280d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 3281d9ae7f2bSJakub Kicinski 3282d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3283d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3284d9ae7f2bSJakub Kicinski 3285d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 3286d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 3287d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3288d9ae7f2bSJakub Kicinski 3289d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 3290d9ae7f2bSJakub Kicinski 3291d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3292d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 3293d9ae7f2bSJakub Kicinski 3294d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3295d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3296d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3297d9ae7f2bSJakub Kicinski 3298e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3299d9ae7f2bSJakub Kicinski 3300c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3301d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3302d9ae7f2bSJakub Kicinski } 3303d9ae7f2bSJakub Kicinski 3304d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 3305d9ae7f2bSJakub Kicinski { 3306012bb8a8SJakub Kicinski switch (nfp_prog->type) { 3307012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 3308d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 3309d9ae7f2bSJakub Kicinski break; 3310012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 3311d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 3312d9ae7f2bSJakub Kicinski break; 3313012bb8a8SJakub Kicinski default: 3314012bb8a8SJakub Kicinski WARN_ON(1); 3315d9ae7f2bSJakub Kicinski } 3316d9ae7f2bSJakub Kicinski } 3317d9ae7f2bSJakub Kicinski 3318d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 3319d9ae7f2bSJakub Kicinski { 3320d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3321ff42bb9fSJakub Kicinski int err; 3322d9ae7f2bSJakub Kicinski 3323d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 3324d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3325d9ae7f2bSJakub Kicinski return nfp_prog->error; 3326d9ae7f2bSJakub Kicinski 3327d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3328d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 3329d9ae7f2bSJakub Kicinski 3330d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 3331d9ae7f2bSJakub Kicinski 3332d9ae7f2bSJakub Kicinski if (meta->skip) { 3333d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3334d9ae7f2bSJakub Kicinski continue; 3335d9ae7f2bSJakub Kicinski } 3336d9ae7f2bSJakub Kicinski 3337d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 3338d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 3339d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 3340d9ae7f2bSJakub Kicinski if (!cb) 3341d9ae7f2bSJakub Kicinski return -ENOENT; 3342d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 3343d9ae7f2bSJakub Kicinski if (err) 3344d9ae7f2bSJakub Kicinski return err; 3345e8a4796eSJakub Kicinski if (nfp_prog->error) 3346e8a4796eSJakub Kicinski return nfp_prog->error; 3347d9ae7f2bSJakub Kicinski 3348d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3349d9ae7f2bSJakub Kicinski } 3350d9ae7f2bSJakub Kicinski 3351854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 3352854dc87dSJiong Wang 3353d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 3354d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3355d9ae7f2bSJakub Kicinski return nfp_prog->error; 3356d9ae7f2bSJakub Kicinski 3357ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 33581c03e03fSJakub Kicinski if (nfp_prog->error) 33591c03e03fSJakub Kicinski return nfp_prog->error; 33601c03e03fSJakub Kicinski 3361d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 3362d9ae7f2bSJakub Kicinski } 3363d9ae7f2bSJakub Kicinski 3364d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 3365d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 3366d9ae7f2bSJakub Kicinski { 3367d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3368d9ae7f2bSJakub Kicinski 3369d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3370d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 3371d9ae7f2bSJakub Kicinski 3372d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 3373d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 3374d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 3375d9ae7f2bSJakub Kicinski continue; 3376d9ae7f2bSJakub Kicinski 3377d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 3378d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 3379d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 3380d9ae7f2bSJakub Kicinski meta->skip = true; 3381d9ae7f2bSJakub Kicinski 3382d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 3383d9ae7f2bSJakub Kicinski if (!meta->skip) 3384d9ae7f2bSJakub Kicinski return; 3385d9ae7f2bSJakub Kicinski } 3386d9ae7f2bSJakub Kicinski } 3387d9ae7f2bSJakub Kicinski 33886c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 33896c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 33906c59500cSJakub Kicinski */ 33916c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 33926c59500cSJakub Kicinski { 33936c59500cSJakub Kicinski struct nfp_insn_meta *meta; 33946c59500cSJakub Kicinski 33956c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 33966c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 33976c59500cSJakub Kicinski 33986c59500cSJakub Kicinski if (meta->skip) 33996c59500cSJakub Kicinski continue; 34006c59500cSJakub Kicinski 34016c59500cSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_ALU && 34027bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_ALU64 && 34037bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_JMP) 34046c59500cSJakub Kicinski continue; 34056c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 34066c59500cSJakub Kicinski continue; 34076c59500cSJakub Kicinski if (insn.imm >= 0) 34086c59500cSJakub Kicinski continue; 34096c59500cSJakub Kicinski 34107bdc97beSJakub Kicinski if (BPF_CLASS(insn.code) == BPF_JMP) { 34117bdc97beSJakub Kicinski switch (BPF_OP(insn.code)) { 34127bdc97beSJakub Kicinski case BPF_JGE: 34137bdc97beSJakub Kicinski case BPF_JSGE: 34147bdc97beSJakub Kicinski case BPF_JLT: 34157bdc97beSJakub Kicinski case BPF_JSLT: 34167bdc97beSJakub Kicinski meta->jump_neg_op = true; 34177bdc97beSJakub Kicinski break; 34187bdc97beSJakub Kicinski default: 34197bdc97beSJakub Kicinski continue; 34207bdc97beSJakub Kicinski } 34217bdc97beSJakub Kicinski } else { 34226c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 34236c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 34246c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 34256c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 34266c59500cSJakub Kicinski else 34276c59500cSJakub Kicinski continue; 34286c59500cSJakub Kicinski 34296c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 34307bdc97beSJakub Kicinski } 34316c59500cSJakub Kicinski 34326c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 34336c59500cSJakub Kicinski } 34346c59500cSJakub Kicinski } 34356c59500cSJakub Kicinski 3436d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 3437d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 3438d9ae7f2bSJakub Kicinski { 3439d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3440d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 3441d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 3442d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 3443d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 3444d9ae7f2bSJakub Kicinski }; 3445d9ae7f2bSJakub Kicinski 3446d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3447d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 3448d9ae7f2bSJakub Kicinski 3449d9ae7f2bSJakub Kicinski insn = meta1->insn; 3450d9ae7f2bSJakub Kicinski next = meta2->insn; 3451d9ae7f2bSJakub Kicinski 3452d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3453d9ae7f2bSJakub Kicinski continue; 3454d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3455d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3456d9ae7f2bSJakub Kicinski continue; 3457d9ae7f2bSJakub Kicinski 3458d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 3459d9ae7f2bSJakub Kicinski continue; 3460d9ae7f2bSJakub Kicinski 3461d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 3462d9ae7f2bSJakub Kicinski continue; 3463d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 3464d9ae7f2bSJakub Kicinski continue; 3465d9ae7f2bSJakub Kicinski 3466d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 3467d9ae7f2bSJakub Kicinski continue; 3468d9ae7f2bSJakub Kicinski 34691266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 34701266f5d6SJiong Wang continue; 34711266f5d6SJiong Wang 3472d9ae7f2bSJakub Kicinski meta2->skip = true; 3473d9ae7f2bSJakub Kicinski } 3474d9ae7f2bSJakub Kicinski } 3475d9ae7f2bSJakub Kicinski 3476d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 3477d9ae7f2bSJakub Kicinski { 3478d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 3479d9ae7f2bSJakub Kicinski 3480d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 3481d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 3482d9ae7f2bSJakub Kicinski 3483d9ae7f2bSJakub Kicinski insn = meta1->insn; 3484d9ae7f2bSJakub Kicinski next1 = meta2->insn; 3485d9ae7f2bSJakub Kicinski next2 = meta3->insn; 3486d9ae7f2bSJakub Kicinski 3487d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3488d9ae7f2bSJakub Kicinski continue; 3489d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3490d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3491d9ae7f2bSJakub Kicinski continue; 3492d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 3493d9ae7f2bSJakub Kicinski continue; 3494d9ae7f2bSJakub Kicinski 3495d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 3496d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 3497d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 3498d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 3499d9ae7f2bSJakub Kicinski continue; 3500d9ae7f2bSJakub Kicinski 3501d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 3502d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 3503d9ae7f2bSJakub Kicinski continue; 3504d9ae7f2bSJakub Kicinski 3505d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 3506d9ae7f2bSJakub Kicinski continue; 3507d9ae7f2bSJakub Kicinski 350829fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 350929fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 351029fe46efSJiong Wang continue; 351129fe46efSJiong Wang 3512d9ae7f2bSJakub Kicinski meta2->skip = true; 3513d9ae7f2bSJakub Kicinski meta3->skip = true; 3514d9ae7f2bSJakub Kicinski } 3515d9ae7f2bSJakub Kicinski } 3516d9ae7f2bSJakub Kicinski 35176bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 35186bc7103cSJiong Wang * 35196bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 35206bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 35216bc7103cSJiong Wang * 35226bc7103cSJiong Wang * The destination register of load and source register of store should 35236bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 35246bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 35256bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 35266bc7103cSJiong Wang */ 35276bc7103cSJiong Wang static bool 35286bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 35296bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 35306bc7103cSJiong Wang { 35316bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 35326bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 35336bc7103cSJiong Wang 35346bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 35356bc7103cSJiong Wang return false; 35366bc7103cSJiong Wang 3537cc0dff6dSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET && 3538cc0dff6dSJiong Wang ld_meta->ptr.type != PTR_TO_MAP_VALUE) 35396bc7103cSJiong Wang return false; 35406bc7103cSJiong Wang 35416bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 35426bc7103cSJiong Wang return false; 35436bc7103cSJiong Wang 35446bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 35456bc7103cSJiong Wang return false; 35466bc7103cSJiong Wang 35476bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 35486bc7103cSJiong Wang return false; 35496bc7103cSJiong Wang 35506bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 35516bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 35526bc7103cSJiong Wang return false; 35536bc7103cSJiong Wang 35546bc7103cSJiong Wang return true; 35556bc7103cSJiong Wang } 35566bc7103cSJiong Wang 35576bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 35586bc7103cSJiong Wang * 35596bc7103cSJiong Wang * - Their address base registers are the same. 35606bc7103cSJiong Wang * - Their address offsets are in the same order. 35616bc7103cSJiong Wang * - They operate at the same memory width. 35626bc7103cSJiong Wang * - There is no jump into the middle of them. 35636bc7103cSJiong Wang */ 35646bc7103cSJiong Wang static bool 35656bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 35666bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 35676bc7103cSJiong Wang struct bpf_insn *prev_ld, 35686bc7103cSJiong Wang struct bpf_insn *prev_st) 35696bc7103cSJiong Wang { 35706bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 35716bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 35726bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 35736bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 35746bc7103cSJiong Wang 35756bc7103cSJiong Wang /* This pair is the start pair. */ 35766bc7103cSJiong Wang if (!prev_ld) 35776bc7103cSJiong Wang return true; 35786bc7103cSJiong Wang 35796bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 35806bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 35816bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 35826bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 35836bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 35846bc7103cSJiong Wang prev_ld_off = prev_ld->off; 35856bc7103cSJiong Wang prev_st_off = prev_st->off; 35866bc7103cSJiong Wang 35876bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 35886bc7103cSJiong Wang return false; 35896bc7103cSJiong Wang 35906bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 35916bc7103cSJiong Wang return false; 35926bc7103cSJiong Wang 35936bc7103cSJiong Wang if (curr_size != prev_size) 35946bc7103cSJiong Wang return false; 35956bc7103cSJiong Wang 35966bc7103cSJiong Wang /* There is jump to the head of this pair. */ 35976bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 35986bc7103cSJiong Wang return false; 35996bc7103cSJiong Wang 36006bc7103cSJiong Wang /* Both in ascending order. */ 36016bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 36026bc7103cSJiong Wang prev_st_off + prev_size == st->off) 36036bc7103cSJiong Wang return true; 36046bc7103cSJiong Wang 36056bc7103cSJiong Wang /* Both in descending order. */ 36066bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 36076bc7103cSJiong Wang st->off + curr_size == prev_st_off) 36086bc7103cSJiong Wang return true; 36096bc7103cSJiong Wang 36106bc7103cSJiong Wang return false; 36116bc7103cSJiong Wang } 36126bc7103cSJiong Wang 36136bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 36146bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 36156bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 36166bc7103cSJiong Wang * as an memory copy. 36176bc7103cSJiong Wang */ 36186bc7103cSJiong Wang static bool 36196bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 36206bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 36216bc7103cSJiong Wang { 36226bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 36236bc7103cSJiong Wang 36246bc7103cSJiong Wang /* Different pointer types does not overlap. */ 36256bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 36266bc7103cSJiong Wang return false; 36276bc7103cSJiong Wang 36286bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 36296bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 36306bc7103cSJiong Wang return true; 36316bc7103cSJiong Wang 36326bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 36336bc7103cSJiong Wang * base register. 36346bc7103cSJiong Wang */ 36356bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 36366bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 36376bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 36386bc7103cSJiong Wang 36396bc7103cSJiong Wang /* Ascending order cross. */ 36406bc7103cSJiong Wang if (ld_off > head_ld_off && 36416bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 36426bc7103cSJiong Wang return true; 36436bc7103cSJiong Wang 36446bc7103cSJiong Wang /* Descending order cross. */ 36456bc7103cSJiong Wang if (ld_off < head_ld_off && 36466bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 36476bc7103cSJiong Wang return true; 36486bc7103cSJiong Wang 36496bc7103cSJiong Wang return false; 36506bc7103cSJiong Wang } 36516bc7103cSJiong Wang 36526bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 36536bc7103cSJiong Wang * 36546bc7103cSJiong Wang * load R, [regA + offA] 36556bc7103cSJiong Wang * store [regB + offB], R 36566bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 36576bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 36586bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 36596bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 36606bc7103cSJiong Wang * ... 36616bc7103cSJiong Wang * 36626bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 36636bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 36646bc7103cSJiong Wang */ 36656bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 36666bc7103cSJiong Wang { 36676bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 36686bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 36696bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 36706bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 36716bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 36726bc7103cSJiong Wang u8 count = 0; 36736bc7103cSJiong Wang 36746bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 36756bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 36766bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 36776bc7103cSJiong Wang 36786bc7103cSJiong Wang /* Reset record status if any of the following if true: 36796bc7103cSJiong Wang * - The current insn pair is not load/store. 36806bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 36816bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 36826bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 36836bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 36846bc7103cSJiong Wang * single NFP CPP command can transfer. 36856bc7103cSJiong Wang */ 36866bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 36876bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 36886bc7103cSJiong Wang prev_st) || 36896bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 36906bc7103cSJiong Wang head_st_meta) || 36916bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 36926bc7103cSJiong Wang if (!count) 36936bc7103cSJiong Wang continue; 36946bc7103cSJiong Wang 36956bc7103cSJiong Wang if (count > 1) { 36966bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 36976bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 36986bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 36996bc7103cSJiong Wang 37006bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 37016bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 37026bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 37036bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 37046bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 37056bc7103cSJiong Wang } 37066bc7103cSJiong Wang 37076bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 37086bc7103cSJiong Wang head_st_meta->skip = true; 37096bc7103cSJiong Wang } else { 37106bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 37116bc7103cSJiong Wang } 37126bc7103cSJiong Wang 37136bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 37146bc7103cSJiong Wang * could serve as the new head of the the next chain. 37156bc7103cSJiong Wang */ 37166bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 37176bc7103cSJiong Wang head_ld_meta = meta1; 37186bc7103cSJiong Wang head_st_meta = meta2; 37196bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 37206bc7103cSJiong Wang BPF_LDST_BYTES(ld); 37216bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 37226bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 37236bc7103cSJiong Wang prev_ld = ld; 37246bc7103cSJiong Wang prev_st = st; 37256bc7103cSJiong Wang count = 1; 37266bc7103cSJiong Wang } else { 37276bc7103cSJiong Wang head_ld_meta = NULL; 37286bc7103cSJiong Wang head_st_meta = NULL; 37296bc7103cSJiong Wang prev_ld = NULL; 37306bc7103cSJiong Wang prev_st = NULL; 37316bc7103cSJiong Wang count = 0; 37326bc7103cSJiong Wang } 37336bc7103cSJiong Wang 37346bc7103cSJiong Wang continue; 37356bc7103cSJiong Wang } 37366bc7103cSJiong Wang 37376bc7103cSJiong Wang if (!head_ld_meta) { 37386bc7103cSJiong Wang head_ld_meta = meta1; 37396bc7103cSJiong Wang head_st_meta = meta2; 37406bc7103cSJiong Wang } else { 37416bc7103cSJiong Wang meta1->skip = true; 37426bc7103cSJiong Wang meta2->skip = true; 37436bc7103cSJiong Wang } 37446bc7103cSJiong Wang 37456bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 37466bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 37476bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 37486bc7103cSJiong Wang prev_ld = ld; 37496bc7103cSJiong Wang prev_st = st; 37506bc7103cSJiong Wang count++; 37516bc7103cSJiong Wang } 37526bc7103cSJiong Wang } 37536bc7103cSJiong Wang 375487b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 375587b10ecdSJiong Wang { 375687b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 375787b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 375887b10ecdSJiong Wang bool cache_avail = false; 375987b10ecdSJiong Wang struct bpf_insn *insn; 376087b10ecdSJiong Wang s32 range_ptr_off = 0; 376187b10ecdSJiong Wang u32 range_ptr_id = 0; 376287b10ecdSJiong Wang 376387b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 376487b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 376587b10ecdSJiong Wang cache_avail = false; 376687b10ecdSJiong Wang 376787b10ecdSJiong Wang if (meta->skip) 376887b10ecdSJiong Wang continue; 376987b10ecdSJiong Wang 377087b10ecdSJiong Wang insn = &meta->insn; 377187b10ecdSJiong Wang 377287b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 377387b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 377487b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 377587b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 377687b10ecdSJiong Wang cache_avail = false; 377787b10ecdSJiong Wang continue; 377887b10ecdSJiong Wang } 377987b10ecdSJiong Wang 378087b10ecdSJiong Wang if (!is_mbpf_load(meta)) 378187b10ecdSJiong Wang continue; 378287b10ecdSJiong Wang 378387b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 378487b10ecdSJiong Wang cache_avail = false; 378587b10ecdSJiong Wang continue; 378687b10ecdSJiong Wang } 378787b10ecdSJiong Wang 378887b10ecdSJiong Wang if (!cache_avail) { 378987b10ecdSJiong Wang cache_avail = true; 379087b10ecdSJiong Wang if (range_node) 379187b10ecdSJiong Wang goto end_current_then_start_new; 379287b10ecdSJiong Wang goto start_new; 379387b10ecdSJiong Wang } 379487b10ecdSJiong Wang 379587b10ecdSJiong Wang /* Check ID to make sure two reads share the same 379687b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 379787b10ecdSJiong Wang * to make sure they also share the same constant 379887b10ecdSJiong Wang * offset. 379987b10ecdSJiong Wang * 380087b10ecdSJiong Wang * OFFs don't really need to be the same, because they 380187b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 380287b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 380387b10ecdSJiong Wang * offsets against original packet pointer. We don't 380487b10ecdSJiong Wang * support this. 380587b10ecdSJiong Wang */ 380687b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 380787b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 380887b10ecdSJiong Wang s16 new_start = range_start; 380987b10ecdSJiong Wang s16 end, off = insn->off; 381087b10ecdSJiong Wang s16 new_end = range_end; 381187b10ecdSJiong Wang bool changed = false; 381287b10ecdSJiong Wang 381387b10ecdSJiong Wang if (off < range_start) { 381487b10ecdSJiong Wang new_start = off; 381587b10ecdSJiong Wang changed = true; 381687b10ecdSJiong Wang } 381787b10ecdSJiong Wang 381887b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 381987b10ecdSJiong Wang if (end > range_end) { 382087b10ecdSJiong Wang new_end = end; 382187b10ecdSJiong Wang changed = true; 382287b10ecdSJiong Wang } 382387b10ecdSJiong Wang 382487b10ecdSJiong Wang if (!changed) 382587b10ecdSJiong Wang continue; 382687b10ecdSJiong Wang 382787b10ecdSJiong Wang if (new_end - new_start <= 64) { 382887b10ecdSJiong Wang /* Install new range. */ 382987b10ecdSJiong Wang range_start = new_start; 383087b10ecdSJiong Wang range_end = new_end; 383187b10ecdSJiong Wang continue; 383287b10ecdSJiong Wang } 383387b10ecdSJiong Wang } 383487b10ecdSJiong Wang 383587b10ecdSJiong Wang end_current_then_start_new: 383687b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 383787b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 383887b10ecdSJiong Wang start_new: 383987b10ecdSJiong Wang range_node = meta; 384087b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 384187b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 384287b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 384387b10ecdSJiong Wang range_start = insn->off; 384487b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 384587b10ecdSJiong Wang } 384687b10ecdSJiong Wang 384787b10ecdSJiong Wang if (range_node) { 384887b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 384987b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 385087b10ecdSJiong Wang } 385187b10ecdSJiong Wang 385287b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 385387b10ecdSJiong Wang if (meta->skip) 385487b10ecdSJiong Wang continue; 385587b10ecdSJiong Wang 385687b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 385787b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 385887b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 385987b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 386087b10ecdSJiong Wang } else { 386187b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 386287b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 386387b10ecdSJiong Wang } 386487b10ecdSJiong Wang } 386587b10ecdSJiong Wang } 386687b10ecdSJiong Wang } 386787b10ecdSJiong Wang 3868d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 3869d9ae7f2bSJakub Kicinski { 3870d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 3871d9ae7f2bSJakub Kicinski 38726c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 3873d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 3874d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 38756bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 387687b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 3877d9ae7f2bSJakub Kicinski 3878d9ae7f2bSJakub Kicinski return 0; 3879d9ae7f2bSJakub Kicinski } 3880d9ae7f2bSJakub Kicinski 3881b4264c96SJakub Kicinski static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) 3882b4264c96SJakub Kicinski { 3883b4264c96SJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3884b4264c96SJakub Kicinski struct nfp_bpf_map *nfp_map; 3885b4264c96SJakub Kicinski struct bpf_map *map; 3886ab01f4acSJakub Kicinski u32 id; 3887b4264c96SJakub Kicinski 3888b4264c96SJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3889b4264c96SJakub Kicinski if (meta1->skip || meta2->skip) 3890b4264c96SJakub Kicinski continue; 3891b4264c96SJakub Kicinski 3892b4264c96SJakub Kicinski if (meta1->insn.code != (BPF_LD | BPF_IMM | BPF_DW) || 3893b4264c96SJakub Kicinski meta1->insn.src_reg != BPF_PSEUDO_MAP_FD) 3894b4264c96SJakub Kicinski continue; 3895b4264c96SJakub Kicinski 3896b4264c96SJakub Kicinski map = (void *)(unsigned long)((u32)meta1->insn.imm | 3897b4264c96SJakub Kicinski (u64)meta2->insn.imm << 32); 3898ab01f4acSJakub Kicinski if (bpf_map_offload_neutral(map)) { 3899ab01f4acSJakub Kicinski id = map->id; 3900ab01f4acSJakub Kicinski } else { 3901b4264c96SJakub Kicinski nfp_map = map_to_offmap(map)->dev_priv; 3902ab01f4acSJakub Kicinski id = nfp_map->tid; 3903ab01f4acSJakub Kicinski } 3904b4264c96SJakub Kicinski 3905ab01f4acSJakub Kicinski meta1->insn.imm = id; 3906b4264c96SJakub Kicinski meta2->insn.imm = 0; 3907b4264c96SJakub Kicinski } 3908b4264c96SJakub Kicinski 3909b4264c96SJakub Kicinski return 0; 3910b4264c96SJakub Kicinski } 3911b4264c96SJakub Kicinski 39122314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 3913fd068ddcSJakub Kicinski { 39142314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 3915fd068ddcSJakub Kicinski int i; 3916fd068ddcSJakub Kicinski 39172314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 3918fd068ddcSJakub Kicinski int err; 3919fd068ddcSJakub Kicinski 39202314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 3921fd068ddcSJakub Kicinski if (err) 3922fd068ddcSJakub Kicinski return err; 3923fd068ddcSJakub Kicinski 39242314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 3925fd068ddcSJakub Kicinski } 3926fd068ddcSJakub Kicinski 3927fd068ddcSJakub Kicinski return 0; 3928fd068ddcSJakub Kicinski } 3929fd068ddcSJakub Kicinski 393044a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 393144a12eccSJakub Kicinski { 393244a12eccSJakub Kicinski void *prog; 393344a12eccSJakub Kicinski 393444a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 393544a12eccSJakub Kicinski if (!prog) 393644a12eccSJakub Kicinski return; 393744a12eccSJakub Kicinski 393844a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 393944a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 394044a12eccSJakub Kicinski kvfree(nfp_prog->prog); 394144a12eccSJakub Kicinski nfp_prog->prog = prog; 394244a12eccSJakub Kicinski } 394344a12eccSJakub Kicinski 3944c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 3945d9ae7f2bSJakub Kicinski { 3946d9ae7f2bSJakub Kicinski int ret; 3947d9ae7f2bSJakub Kicinski 3948b4264c96SJakub Kicinski ret = nfp_bpf_replace_map_ptrs(nfp_prog); 3949b4264c96SJakub Kicinski if (ret) 3950b4264c96SJakub Kicinski return ret; 3951b4264c96SJakub Kicinski 3952d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 3953d9ae7f2bSJakub Kicinski if (ret) 39549314c442SJakub Kicinski return ret; 3955d9ae7f2bSJakub Kicinski 3956d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 3957d9ae7f2bSJakub Kicinski if (ret) { 3958d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 3959d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 39609314c442SJakub Kicinski return -EINVAL; 3961d9ae7f2bSJakub Kicinski } 3962d9ae7f2bSJakub Kicinski 396344a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 396444a12eccSJakub Kicinski 39652314fe9eSJakub Kicinski return ret; 3966d9ae7f2bSJakub Kicinski } 39671549921dSJakub Kicinski 39681549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 39691549921dSJakub Kicinski { 39701549921dSJakub Kicinski struct nfp_insn_meta *meta; 39711549921dSJakub Kicinski 39721549921dSJakub Kicinski /* Another pass to record jump information. */ 39731549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 39741549921dSJakub Kicinski u64 code = meta->insn.code; 39751549921dSJakub Kicinski 39761549921dSJakub Kicinski if (BPF_CLASS(code) == BPF_JMP && BPF_OP(code) != BPF_EXIT && 39771549921dSJakub Kicinski BPF_OP(code) != BPF_CALL) { 39781549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 39791549921dSJakub Kicinski unsigned short dst_indx; 39801549921dSJakub Kicinski 39811549921dSJakub Kicinski dst_indx = meta->n + 1 + meta->insn.off; 39821549921dSJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_indx, 39831549921dSJakub Kicinski cnt); 39841549921dSJakub Kicinski 39851549921dSJakub Kicinski meta->jmp_dst = dst_meta; 39861549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 39871549921dSJakub Kicinski } 39881549921dSJakub Kicinski } 39891549921dSJakub Kicinski } 39902314fe9eSJakub Kicinski 399174801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 399274801e50SQuentin Monnet { 399374801e50SQuentin Monnet return !!instr_cb[code]; 399474801e50SQuentin Monnet } 399574801e50SQuentin Monnet 39962314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 39972314fe9eSJakub Kicinski { 39982314fe9eSJakub Kicinski unsigned int i; 39992314fe9eSJakub Kicinski u64 *prog; 40002314fe9eSJakub Kicinski int err; 40012314fe9eSJakub Kicinski 40022314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 40032314fe9eSJakub Kicinski GFP_KERNEL); 40042314fe9eSJakub Kicinski if (!prog) 40052314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 40062314fe9eSJakub Kicinski 40072314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 40082314fe9eSJakub Kicinski enum nfp_relo_type special; 400977a3d311SJakub Kicinski u32 val; 40102314fe9eSJakub Kicinski 40112314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 40122314fe9eSJakub Kicinski switch (special) { 40132314fe9eSJakub Kicinski case RELO_NONE: 40142314fe9eSJakub Kicinski continue; 40152314fe9eSJakub Kicinski case RELO_BR_REL: 40162314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 40172314fe9eSJakub Kicinski break; 40182314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 40192314fe9eSJakub Kicinski br_set_offset(&prog[i], 40202314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 40212314fe9eSJakub Kicinski break; 40222314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 40232314fe9eSJakub Kicinski br_set_offset(&prog[i], 40242314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 40252314fe9eSJakub Kicinski break; 40262314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 40272314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 40282314fe9eSJakub Kicinski break; 402977a3d311SJakub Kicinski case RELO_BR_HELPER: 403077a3d311SJakub Kicinski val = br_get_offset(prog[i]); 403177a3d311SJakub Kicinski val -= BR_OFF_RELO; 403277a3d311SJakub Kicinski switch (val) { 403377a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 403477a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 403577a3d311SJakub Kicinski break; 403644d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 403744d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 403844d65a47SJakub Kicinski break; 4039bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 4040bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 4041bfee64deSJakub Kicinski break; 40429816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 40439816dd35SJakub Kicinski val = nfp_prog->bpf->helpers.perf_event_output; 40449816dd35SJakub Kicinski break; 404577a3d311SJakub Kicinski default: 404677a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 404777a3d311SJakub Kicinski val); 404877a3d311SJakub Kicinski err = -EINVAL; 404977a3d311SJakub Kicinski goto err_free_prog; 405077a3d311SJakub Kicinski } 405177a3d311SJakub Kicinski br_set_offset(&prog[i], val); 405277a3d311SJakub Kicinski break; 405377a3d311SJakub Kicinski case RELO_IMMED_REL: 405477a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 405577a3d311SJakub Kicinski break; 40562314fe9eSJakub Kicinski } 40572314fe9eSJakub Kicinski 40582314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 40592314fe9eSJakub Kicinski } 40602314fe9eSJakub Kicinski 40612314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 40622314fe9eSJakub Kicinski if (err) 40632314fe9eSJakub Kicinski goto err_free_prog; 40642314fe9eSJakub Kicinski 40652314fe9eSJakub Kicinski return prog; 40662314fe9eSJakub Kicinski 40672314fe9eSJakub Kicinski err_free_prog: 40682314fe9eSJakub Kicinski kfree(prog); 40692314fe9eSJakub Kicinski return ERR_PTR(err); 40702314fe9eSJakub Kicinski } 4071