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 270389f263bSQuentin Monnet __emit_br_alu(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 271389f263bSQuentin Monnet u8 defer, bool dst_lmextn, bool src_lmextn) 272389f263bSQuentin Monnet { 273389f263bSQuentin Monnet u64 insn; 274389f263bSQuentin Monnet 275389f263bSQuentin Monnet insn = OP_BR_ALU_BASE | 276389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_A_SRC, areg) | 277389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_B_SRC, breg) | 278389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_DEFBR, defer) | 279389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_IMM_HI, imm_hi) | 280389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_SRC_LMEXTN, src_lmextn) | 281389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_DST_LMEXTN, dst_lmextn); 282389f263bSQuentin Monnet 283389f263bSQuentin Monnet nfp_prog_push(nfp_prog, insn); 284389f263bSQuentin Monnet } 285389f263bSQuentin Monnet 286389f263bSQuentin Monnet static void emit_rtn(struct nfp_prog *nfp_prog, swreg base, u8 defer) 287389f263bSQuentin Monnet { 288389f263bSQuentin Monnet struct nfp_insn_ur_regs reg; 289389f263bSQuentin Monnet int err; 290389f263bSQuentin Monnet 291389f263bSQuentin Monnet err = swreg_to_unrestricted(reg_none(), base, reg_imm(0), ®); 292389f263bSQuentin Monnet if (err) { 293389f263bSQuentin Monnet nfp_prog->error = err; 294389f263bSQuentin Monnet return; 295389f263bSQuentin Monnet } 296389f263bSQuentin Monnet 297389f263bSQuentin Monnet __emit_br_alu(nfp_prog, reg.areg, reg.breg, 0, defer, reg.dst_lmextn, 298389f263bSQuentin Monnet reg.src_lmextn); 299389f263bSQuentin Monnet } 300389f263bSQuentin Monnet 301389f263bSQuentin Monnet static void 302d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 303d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 304995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 305995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 306d9ae7f2bSJakub Kicinski { 307d9ae7f2bSJakub Kicinski u64 insn; 308d9ae7f2bSJakub Kicinski 309d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 310d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 311d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 312d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 313d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 314d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 315d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 316995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 317995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 318995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 319d9ae7f2bSJakub Kicinski 320d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 321d9ae7f2bSJakub Kicinski } 322d9ae7f2bSJakub Kicinski 323d9ae7f2bSJakub Kicinski static void 324b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 325d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 326d9ae7f2bSJakub Kicinski { 327d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 328d9ae7f2bSJakub Kicinski int err; 329d9ae7f2bSJakub Kicinski 330b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 331d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 332d9ae7f2bSJakub Kicinski return; 333d9ae7f2bSJakub Kicinski } 334d9ae7f2bSJakub Kicinski 335d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 336d9ae7f2bSJakub Kicinski if (err) { 337d9ae7f2bSJakub Kicinski nfp_prog->error = err; 338d9ae7f2bSJakub Kicinski return; 339d9ae7f2bSJakub Kicinski } 340d9ae7f2bSJakub Kicinski 3413239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 3423239e7bbSJiong Wang __emit_immed(nfp_prog, 3433239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 3443239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 3453239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 346d9ae7f2bSJakub Kicinski } 347d9ae7f2bSJakub Kicinski 348d9ae7f2bSJakub Kicinski static void 349d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 350d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 351995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 352995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 353d9ae7f2bSJakub Kicinski { 354d9ae7f2bSJakub Kicinski u64 insn; 355d9ae7f2bSJakub Kicinski 356d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 357d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 358d9ae7f2bSJakub Kicinski return; 359d9ae7f2bSJakub Kicinski } 360d9ae7f2bSJakub Kicinski 361d9ae7f2bSJakub Kicinski if (sc == SHF_SC_L_SHF) 362d9ae7f2bSJakub Kicinski shift = 32 - shift; 363d9ae7f2bSJakub Kicinski 364d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 365d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 366d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 367d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 368d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 369d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 370d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 371d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 372d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 373d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 374995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 375995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 376995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 377d9ae7f2bSJakub Kicinski 378d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 379d9ae7f2bSJakub Kicinski } 380d9ae7f2bSJakub Kicinski 381d9ae7f2bSJakub Kicinski static void 382b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 383b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 384d9ae7f2bSJakub Kicinski { 385d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 386d9ae7f2bSJakub Kicinski int err; 387d9ae7f2bSJakub Kicinski 388d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 389d9ae7f2bSJakub Kicinski if (err) { 390d9ae7f2bSJakub Kicinski nfp_prog->error = err; 391d9ae7f2bSJakub Kicinski return; 392d9ae7f2bSJakub Kicinski } 393d9ae7f2bSJakub Kicinski 394d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 395995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 396995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 397d9ae7f2bSJakub Kicinski } 398d9ae7f2bSJakub Kicinski 399d9ae7f2bSJakub Kicinski static void 400991f5b36SJiong Wang emit_shf_indir(struct nfp_prog *nfp_prog, swreg dst, 401991f5b36SJiong Wang swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc) 402991f5b36SJiong Wang { 403991f5b36SJiong Wang if (sc == SHF_SC_R_ROT) { 404991f5b36SJiong Wang pr_err("indirect shift is not allowed on rotation\n"); 405991f5b36SJiong Wang nfp_prog->error = -EFAULT; 406991f5b36SJiong Wang return; 407991f5b36SJiong Wang } 408991f5b36SJiong Wang 409991f5b36SJiong Wang emit_shf(nfp_prog, dst, lreg, op, rreg, sc, 0); 410991f5b36SJiong Wang } 411991f5b36SJiong Wang 412991f5b36SJiong Wang static void 413d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 414995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 415995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 416d9ae7f2bSJakub Kicinski { 417d9ae7f2bSJakub Kicinski u64 insn; 418d9ae7f2bSJakub Kicinski 419d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 420d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 421d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 422d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 423d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 424d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 425d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 426995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 427995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 428995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 429d9ae7f2bSJakub Kicinski 430d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 431d9ae7f2bSJakub Kicinski } 432d9ae7f2bSJakub Kicinski 433d9ae7f2bSJakub Kicinski static void 434b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 435b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 436d9ae7f2bSJakub Kicinski { 437d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 438d9ae7f2bSJakub Kicinski int err; 439d9ae7f2bSJakub Kicinski 440d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 441d9ae7f2bSJakub Kicinski if (err) { 442d9ae7f2bSJakub Kicinski nfp_prog->error = err; 443d9ae7f2bSJakub Kicinski return; 444d9ae7f2bSJakub Kicinski } 445d9ae7f2bSJakub Kicinski 446d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 447995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 448995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 449d9ae7f2bSJakub Kicinski } 450d9ae7f2bSJakub Kicinski 451d9ae7f2bSJakub Kicinski static void 452d3d23fdbSJiong Wang __emit_mul(struct nfp_prog *nfp_prog, enum alu_dst_ab dst_ab, u16 areg, 453d3d23fdbSJiong Wang enum mul_type type, enum mul_step step, u16 breg, bool swap, 454d3d23fdbSJiong Wang bool wr_both, bool dst_lmextn, bool src_lmextn) 455d3d23fdbSJiong Wang { 456d3d23fdbSJiong Wang u64 insn; 457d3d23fdbSJiong Wang 458d3d23fdbSJiong Wang insn = OP_MUL_BASE | 459d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_A_SRC, areg) | 460d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_B_SRC, breg) | 461d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_STEP, step) | 462d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_DST_AB, dst_ab) | 463d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_SW, swap) | 464d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_TYPE, type) | 465d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_WR_AB, wr_both) | 466d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_SRC_LMEXTN, src_lmextn) | 467d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_DST_LMEXTN, dst_lmextn); 468d3d23fdbSJiong Wang 469d3d23fdbSJiong Wang nfp_prog_push(nfp_prog, insn); 470d3d23fdbSJiong Wang } 471d3d23fdbSJiong Wang 472d3d23fdbSJiong Wang static void 473d3d23fdbSJiong Wang emit_mul(struct nfp_prog *nfp_prog, swreg lreg, enum mul_type type, 474d3d23fdbSJiong Wang enum mul_step step, swreg rreg) 475d3d23fdbSJiong Wang { 476d3d23fdbSJiong Wang struct nfp_insn_ur_regs reg; 477d3d23fdbSJiong Wang u16 areg; 478d3d23fdbSJiong Wang int err; 479d3d23fdbSJiong Wang 480d3d23fdbSJiong Wang if (type == MUL_TYPE_START && step != MUL_STEP_NONE) { 481d3d23fdbSJiong Wang nfp_prog->error = -EINVAL; 482d3d23fdbSJiong Wang return; 483d3d23fdbSJiong Wang } 484d3d23fdbSJiong Wang 485d3d23fdbSJiong Wang if (step == MUL_LAST || step == MUL_LAST_2) { 486d3d23fdbSJiong Wang /* When type is step and step Number is LAST or LAST2, left 487d3d23fdbSJiong Wang * source is used as destination. 488d3d23fdbSJiong Wang */ 489d3d23fdbSJiong Wang err = swreg_to_unrestricted(lreg, reg_none(), rreg, ®); 490d3d23fdbSJiong Wang areg = reg.dst; 491d3d23fdbSJiong Wang } else { 492d3d23fdbSJiong Wang err = swreg_to_unrestricted(reg_none(), lreg, rreg, ®); 493d3d23fdbSJiong Wang areg = reg.areg; 494d3d23fdbSJiong Wang } 495d3d23fdbSJiong Wang 496d3d23fdbSJiong Wang if (err) { 497d3d23fdbSJiong Wang nfp_prog->error = err; 498d3d23fdbSJiong Wang return; 499d3d23fdbSJiong Wang } 500d3d23fdbSJiong Wang 501d3d23fdbSJiong Wang __emit_mul(nfp_prog, reg.dst_ab, areg, type, step, reg.breg, reg.swap, 502d3d23fdbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 503d3d23fdbSJiong Wang } 504d3d23fdbSJiong Wang 505d3d23fdbSJiong Wang static void 506d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 507d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 508995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 509995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 510d9ae7f2bSJakub Kicinski { 511d9ae7f2bSJakub Kicinski u64 insn; 512d9ae7f2bSJakub Kicinski 513d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 514d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 515d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 516d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 517d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 518d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 519d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 520d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 521d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 522995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 523995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 524995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 525d9ae7f2bSJakub Kicinski 526d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 527d9ae7f2bSJakub Kicinski } 528d9ae7f2bSJakub Kicinski 529d9ae7f2bSJakub Kicinski static void 530bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 531bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 532d9ae7f2bSJakub Kicinski { 533d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 534d9ae7f2bSJakub Kicinski int err; 535d9ae7f2bSJakub Kicinski 5362de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 5372de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 538d9ae7f2bSJakub Kicinski if (err) { 539d9ae7f2bSJakub Kicinski nfp_prog->error = err; 540d9ae7f2bSJakub Kicinski return; 541d9ae7f2bSJakub Kicinski } 542d9ae7f2bSJakub Kicinski 543d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 544995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 545995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 546d9ae7f2bSJakub Kicinski } 547d9ae7f2bSJakub Kicinski 548d9ae7f2bSJakub Kicinski static void 549b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 550d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 551d9ae7f2bSJakub Kicinski { 552bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 553d9ae7f2bSJakub Kicinski } 554d9ae7f2bSJakub Kicinski 5552df03a50SJakub Kicinski static void 5562df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 5572df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 5582df03a50SJakub Kicinski { 5592df03a50SJakub Kicinski u64 insn; 5602df03a50SJakub Kicinski 5612df03a50SJakub Kicinski insn = OP_LCSR_BASE | 5622df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 5632df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 5642df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 565df4a37d8SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr / 4) | 5662df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 5672df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 5682df03a50SJakub Kicinski 5692df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 5702df03a50SJakub Kicinski } 5712df03a50SJakub Kicinski 5722df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 5732df03a50SJakub Kicinski { 5742df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 5752df03a50SJakub Kicinski int err; 5762df03a50SJakub Kicinski 5772df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 5782df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 5792df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 5802df03a50SJakub Kicinski * copy the immed to both operands. 5812df03a50SJakub Kicinski */ 5822df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 5832df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 5842df03a50SJakub Kicinski reg.breg = reg.areg; 5852df03a50SJakub Kicinski } else { 5862df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 5872df03a50SJakub Kicinski } 5882df03a50SJakub Kicinski if (err) { 5892df03a50SJakub Kicinski nfp_prog->error = err; 5902df03a50SJakub Kicinski return; 5912df03a50SJakub Kicinski } 5922df03a50SJakub Kicinski 593df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr, 5942df03a50SJakub Kicinski false, reg.src_lmextn); 5952df03a50SJakub Kicinski } 5962df03a50SJakub Kicinski 597df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 598df4a37d8SJakub Kicinski static void __emit_csr_rd(struct nfp_prog *nfp_prog, u16 addr) 599df4a37d8SJakub Kicinski { 600df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, 0, 0, false, addr, false, false); 601df4a37d8SJakub Kicinski } 602df4a37d8SJakub Kicinski 6031c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 6041c03e03fSJakub Kicinski { 6051c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 6061c03e03fSJakub Kicinski } 6071c03e03fSJakub Kicinski 608d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 609d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 610d9ae7f2bSJakub Kicinski { 611d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 612d9ae7f2bSJakub Kicinski *val = imm; 613d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 614d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 615d9ae7f2bSJakub Kicinski *val = imm >> 8; 616d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 617d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 618d9ae7f2bSJakub Kicinski *val = imm >> 16; 619d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 620d9ae7f2bSJakub Kicinski } else { 621d9ae7f2bSJakub Kicinski return false; 622d9ae7f2bSJakub Kicinski } 623d9ae7f2bSJakub Kicinski 624d9ae7f2bSJakub Kicinski return true; 625d9ae7f2bSJakub Kicinski } 626d9ae7f2bSJakub Kicinski 627b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 628d9ae7f2bSJakub Kicinski { 629d9ae7f2bSJakub Kicinski enum immed_shift shift; 630d9ae7f2bSJakub Kicinski u16 val; 631d9ae7f2bSJakub Kicinski 632d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 633d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 634d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 635d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 636d9ae7f2bSJakub Kicinski } else { 637d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 638d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 639d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 640d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 641d9ae7f2bSJakub Kicinski } 642d9ae7f2bSJakub Kicinski } 643d9ae7f2bSJakub Kicinski 64477a3d311SJakub Kicinski static void 64577a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 64677a3d311SJakub Kicinski enum nfp_relo_type relo) 64777a3d311SJakub Kicinski { 64877a3d311SJakub Kicinski if (imm > 0xffff) { 64977a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 65077a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 65177a3d311SJakub Kicinski return; 65277a3d311SJakub Kicinski } 65377a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 65477a3d311SJakub Kicinski 65577a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 65677a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 65777a3d311SJakub Kicinski } 65877a3d311SJakub Kicinski 659d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 660d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 661d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 662d9ae7f2bSJakub Kicinski */ 663b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 664d9ae7f2bSJakub Kicinski { 665d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 666d9ae7f2bSJakub Kicinski return reg_imm(imm); 667d9ae7f2bSJakub Kicinski 668d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 669d9ae7f2bSJakub Kicinski return tmp_reg; 670d9ae7f2bSJakub Kicinski } 671d9ae7f2bSJakub Kicinski 672d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 673d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 674d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 675d9ae7f2bSJakub Kicinski */ 676b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 677d9ae7f2bSJakub Kicinski { 678d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 679d9ae7f2bSJakub Kicinski return reg_imm(imm); 680d9ae7f2bSJakub Kicinski 681d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 682d9ae7f2bSJakub Kicinski return tmp_reg; 683d9ae7f2bSJakub Kicinski } 684d9ae7f2bSJakub Kicinski 685ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 686ff42bb9fSJakub Kicinski { 687ff42bb9fSJakub Kicinski while (count--) 688ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 689ff42bb9fSJakub Kicinski } 690ff42bb9fSJakub Kicinski 691c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 692c000dfb5SJakub Kicinski { 693c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 694c000dfb5SJakub Kicinski } 695c000dfb5SJakub Kicinski 696d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 697d9ae7f2bSJakub Kicinski { 698c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 699d9ae7f2bSJakub Kicinski } 700d9ae7f2bSJakub Kicinski 7019879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 7029879a381SJiong Wang * result to @dst from low end. 7039879a381SJiong Wang */ 7049879a381SJiong Wang static void 7059879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 7069879a381SJiong Wang u8 offset) 7079879a381SJiong Wang { 7089879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 7099879a381SJiong Wang u8 mask = (1 << field_len) - 1; 7109879a381SJiong Wang 7119879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 7129879a381SJiong Wang } 7139879a381SJiong Wang 71491ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 71591ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 71691ff69e8SJiong Wang */ 71791ff69e8SJiong Wang static void 71891ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 71991ff69e8SJiong Wang u8 field_len, u8 offset) 72091ff69e8SJiong Wang { 72191ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 72291ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 72391ff69e8SJiong Wang 72491ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 72591ff69e8SJiong Wang } 72691ff69e8SJiong Wang 7273dd43c33SJakub Kicinski static void 7283dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7293dd43c33SJakub Kicinski swreg *rega, swreg *regb) 7303dd43c33SJakub Kicinski { 7313dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 7323dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 7333dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 7343dd43c33SJakub Kicinski return; 7353dd43c33SJakub Kicinski } 7363dd43c33SJakub Kicinski 7373dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 7383dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 7393dd43c33SJakub Kicinski reg_imm(0)); 7403dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 7413dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 7423dd43c33SJakub Kicinski } 7433dd43c33SJakub Kicinski 7449879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 7459879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 7469879a381SJiong Wang { 7479879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 7489879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 7499879a381SJiong Wang swreg src_base, off; 7503dd43c33SJakub Kicinski bool src_40bit_addr; 7519879a381SJiong Wang unsigned int i; 7529879a381SJiong Wang u8 xfer_num; 7539879a381SJiong Wang 7549879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 7553dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 7569879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 7579879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 7589879a381SJiong Wang 7593dd43c33SJakub Kicinski if (src_40bit_addr) 760cc0dff6dSJiong Wang addr40_offset(nfp_prog, meta->insn.src_reg * 2, off, &src_base, 7613dd43c33SJakub Kicinski &off); 7623dd43c33SJakub Kicinski 7638c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 7648c900538SJiong Wang if (len > 32) 7658c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7668c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7678c900538SJiong Wang 7689879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 7693dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 7703dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 771b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 7729879a381SJiong Wang 7739879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 7749879a381SJiong Wang for (i = 0; i < xfer_num; i++) 7759879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 7769879a381SJiong Wang 7779879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 7789879a381SJiong Wang 7799879a381SJiong Wang if (len <= 8) { 7809879a381SJiong Wang /* Use single direct_ref write8. */ 7819879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7829879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 783b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7848c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 7859879a381SJiong Wang /* Use single direct_ref write32. */ 7869879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7879879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 788b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7898c900538SJiong Wang } else if (len <= 32) { 7909879a381SJiong Wang /* Use single indirect_ref write8. */ 7919879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 7929879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 7939879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7949879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 795b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 7968c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 7978c900538SJiong Wang /* Use single indirect_ref write32. */ 7988c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7998c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 8008c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 8018c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 802b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 8038c900538SJiong Wang } else if (len <= 40) { 8048c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 8058c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 8068c900538SJiong Wang */ 8078c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 8088c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 809b556ddd9SJakub Kicinski CMD_CTX_SWAP); 8108c900538SJiong Wang 8118c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 8128c900538SJiong Wang imm_b(nfp_prog)); 8138c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 8148c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 815b556ddd9SJakub Kicinski CMD_CTX_SWAP); 8168c900538SJiong Wang } else { 8178c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 8188c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 8198c900538SJiong Wang */ 8208c900538SJiong Wang u8 new_off; 8218c900538SJiong Wang 8228c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 8238c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 8248c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 8258c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 826b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 8278c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 8288c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 8298c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8308c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 831b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 8329879a381SJiong Wang } 8339879a381SJiong Wang 8349879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 8359879a381SJiong Wang * before and after we do memory copy optimization. 8369879a381SJiong Wang * 8379879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 8389879a381SJiong Wang * need to make sure it is loaded with the value the same as before 8399879a381SJiong Wang * this transformation. 8409879a381SJiong Wang * 8419879a381SJiong Wang * These extra loads could be removed once we have accurate register 8429879a381SJiong Wang * usage information. 8439879a381SJiong Wang */ 8449879a381SJiong Wang if (descending_seq) 8459879a381SJiong Wang xfer_num = 0; 8469879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 8479879a381SJiong Wang xfer_num = xfer_num - 1; 8489879a381SJiong Wang else 8499879a381SJiong Wang xfer_num = xfer_num - 2; 8509879a381SJiong Wang 8519879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 8529879a381SJiong Wang case BPF_B: 8539879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8549879a381SJiong Wang reg_xfer(xfer_num), 1, 8559879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 8569879a381SJiong Wang break; 8579879a381SJiong Wang case BPF_H: 8589879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8599879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 8609879a381SJiong Wang break; 8619879a381SJiong Wang case BPF_W: 8629879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8639879a381SJiong Wang reg_xfer(0)); 8649879a381SJiong Wang break; 8659879a381SJiong Wang case BPF_DW: 8669879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8679879a381SJiong Wang reg_xfer(xfer_num)); 8689879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 8699879a381SJiong Wang reg_xfer(xfer_num + 1)); 8709879a381SJiong Wang break; 8719879a381SJiong Wang } 8729879a381SJiong Wang 8739879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 8749879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 8759879a381SJiong Wang 8769879a381SJiong Wang return 0; 8779879a381SJiong Wang } 8789879a381SJiong Wang 879d9ae7f2bSJakub Kicinski static int 8800a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 881d9ae7f2bSJakub Kicinski { 882d9ae7f2bSJakub Kicinski unsigned int i; 883d9ae7f2bSJakub Kicinski u16 shift, sz; 884d9ae7f2bSJakub Kicinski 885d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 886d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 887d9ae7f2bSJakub Kicinski */ 8880a793977SJakub Kicinski sz = max(size, 4); 889d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 890d9ae7f2bSJakub Kicinski 8910a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 892b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 8930a793977SJakub Kicinski 8940a793977SJakub Kicinski i = 0; 8950a793977SJakub Kicinski if (shift) 8960a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 8970a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 8980a793977SJakub Kicinski else 8990a793977SJakub Kicinski for (; i * 4 < size; i++) 9000a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 9010a793977SJakub Kicinski 9020a793977SJakub Kicinski if (i < 2) 9030a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 9040a793977SJakub Kicinski 9050a793977SJakub Kicinski return 0; 9060a793977SJakub Kicinski } 9070a793977SJakub Kicinski 9080a793977SJakub Kicinski static int 9093dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 9103dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 9112ca71441SJakub Kicinski { 9122ca71441SJakub Kicinski unsigned int i; 9132ca71441SJakub Kicinski u8 mask, sz; 9142ca71441SJakub Kicinski 9153dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 9162ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 9172ca71441SJakub Kicinski */ 9182ca71441SJakub Kicinski sz = max(size, 4); 9192ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 9202ca71441SJakub Kicinski 9213dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 922b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 9232ca71441SJakub Kicinski 9242ca71441SJakub Kicinski i = 0; 9252ca71441SJakub Kicinski if (mask) 9262ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 9272ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 9282ca71441SJakub Kicinski else 9292ca71441SJakub Kicinski for (; i * 4 < size; i++) 9302ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 9312ca71441SJakub Kicinski 9322ca71441SJakub Kicinski if (i < 2) 9332ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 9342ca71441SJakub Kicinski 9352ca71441SJakub Kicinski return 0; 9362ca71441SJakub Kicinski } 9372ca71441SJakub Kicinski 9382ca71441SJakub Kicinski static int 9393dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 9403dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 9413dd43c33SJakub Kicinski { 9423dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 9433dd43c33SJakub Kicinski size, CMD_MODE_32b); 9443dd43c33SJakub Kicinski } 9453dd43c33SJakub Kicinski 9463dd43c33SJakub Kicinski static int 9473dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 9483dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 9493dd43c33SJakub Kicinski { 9503dd43c33SJakub Kicinski swreg rega, regb; 9513dd43c33SJakub Kicinski 9523dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 9533dd43c33SJakub Kicinski 9543dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 9553dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 9563dd43c33SJakub Kicinski } 9573dd43c33SJakub Kicinski 9583dd43c33SJakub Kicinski static int 9590a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 9600a793977SJakub Kicinski { 9610a793977SJakub Kicinski swreg tmp_reg; 9620a793977SJakub Kicinski 963d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 964d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9650a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 9660a793977SJakub Kicinski 967d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 968d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 969d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 970d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 97118e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 972e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9730a793977SJakub Kicinski 974d9ae7f2bSJakub Kicinski /* Load data */ 9750a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 976d9ae7f2bSJakub Kicinski } 977d9ae7f2bSJakub Kicinski 978d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 979d9ae7f2bSJakub Kicinski { 9800a793977SJakub Kicinski swreg tmp_reg; 9810a793977SJakub Kicinski 9820a793977SJakub Kicinski /* Check packet length */ 9830a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 9840a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 985e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9860a793977SJakub Kicinski 9870a793977SJakub Kicinski /* Load data */ 9880a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9890a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 990d9ae7f2bSJakub Kicinski } 991d9ae7f2bSJakub Kicinski 992e663fe38SJakub Kicinski static int 993e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 994e663fe38SJakub Kicinski u8 src_gpr, u8 size) 995e663fe38SJakub Kicinski { 996e663fe38SJakub Kicinski unsigned int i; 997e663fe38SJakub Kicinski 998e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 999e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 1000e663fe38SJakub Kicinski 1001e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 1002b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 1003e663fe38SJakub Kicinski 1004e663fe38SJakub Kicinski return 0; 1005e663fe38SJakub Kicinski } 1006e663fe38SJakub Kicinski 1007e663fe38SJakub Kicinski static int 1008e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 1009e663fe38SJakub Kicinski u64 imm, u8 size) 1010e663fe38SJakub Kicinski { 1011e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 1012e663fe38SJakub Kicinski if (size == 8) 1013e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 1014e663fe38SJakub Kicinski 1015e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 1016b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 1017e663fe38SJakub Kicinski 1018e663fe38SJakub Kicinski return 0; 1019e663fe38SJakub Kicinski } 1020e663fe38SJakub Kicinski 1021ee9133a8SJakub Kicinski typedef int 1022ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 10232df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10242df03a50SJakub Kicinski bool needs_inc); 1025a82b23fbSJakub Kicinski 1026a82b23fbSJakub Kicinski static int 1027a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 10282df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10292df03a50SJakub Kicinski bool needs_inc) 1030a82b23fbSJakub Kicinski { 10312df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1032a82b23fbSJakub Kicinski u32 idx, src_byte; 1033a82b23fbSJakub Kicinski enum shf_sc sc; 1034a82b23fbSJakub Kicinski swreg reg; 1035a82b23fbSJakub Kicinski int shf; 1036a82b23fbSJakub Kicinski u8 mask; 1037a82b23fbSJakub Kicinski 1038a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 1039a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1040a82b23fbSJakub Kicinski 1041a82b23fbSJakub Kicinski idx = off / 4; 1042a82b23fbSJakub Kicinski 1043a82b23fbSJakub Kicinski /* Move the entire word */ 1044a82b23fbSJakub Kicinski if (size == 4) { 10452df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 10462df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 1047a82b23fbSJakub Kicinski return 0; 1048a82b23fbSJakub Kicinski } 1049a82b23fbSJakub Kicinski 10502df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 10512df03a50SJakub Kicinski return -EOPNOTSUPP; 10522df03a50SJakub Kicinski 1053a82b23fbSJakub Kicinski src_byte = off % 4; 1054a82b23fbSJakub Kicinski 1055a82b23fbSJakub Kicinski mask = (1 << size) - 1; 1056a82b23fbSJakub Kicinski mask <<= dst_byte; 1057a82b23fbSJakub Kicinski 1058a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1059a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1060a82b23fbSJakub Kicinski 1061a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1062a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 1063a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 1064a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 1065a82b23fbSJakub Kicinski shf = 32 - shf; 1066a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 1067a82b23fbSJakub Kicinski } else { 1068a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 1069a82b23fbSJakub Kicinski } 1070a82b23fbSJakub Kicinski 1071a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1072a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1073a82b23fbSJakub Kicinski */ 1074a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 10752df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1076a82b23fbSJakub Kicinski } else { 1077a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 10789a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 10799a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 10809a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 10819a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 10829a90c83cSJakub Kicinski */ 10839a90c83cSJakub Kicinski if (first || !new_gpr) 1084a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1085a82b23fbSJakub Kicinski } 1086a82b23fbSJakub Kicinski 1087a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 1088a82b23fbSJakub Kicinski 10892df03a50SJakub Kicinski if (should_inc) 10902df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10912df03a50SJakub Kicinski 1092a82b23fbSJakub Kicinski return 0; 1093a82b23fbSJakub Kicinski } 1094ee9133a8SJakub Kicinski 1095ee9133a8SJakub Kicinski static int 1096ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 10972df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10982df03a50SJakub Kicinski bool needs_inc) 1099ee9133a8SJakub Kicinski { 11002df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1101ee9133a8SJakub Kicinski u32 idx, dst_byte; 1102ee9133a8SJakub Kicinski enum shf_sc sc; 1103ee9133a8SJakub Kicinski swreg reg; 1104ee9133a8SJakub Kicinski int shf; 1105ee9133a8SJakub Kicinski u8 mask; 1106ee9133a8SJakub Kicinski 1107ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 1108ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1109ee9133a8SJakub Kicinski 1110ee9133a8SJakub Kicinski idx = off / 4; 1111ee9133a8SJakub Kicinski 1112ee9133a8SJakub Kicinski /* Move the entire word */ 1113ee9133a8SJakub Kicinski if (size == 4) { 11142df03a50SJakub Kicinski wrp_mov(nfp_prog, 11152df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 11162df03a50SJakub Kicinski reg_b(src)); 1117ee9133a8SJakub Kicinski return 0; 1118ee9133a8SJakub Kicinski } 1119ee9133a8SJakub Kicinski 11202df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 11212df03a50SJakub Kicinski return -EOPNOTSUPP; 11222df03a50SJakub Kicinski 1123ee9133a8SJakub Kicinski dst_byte = off % 4; 1124ee9133a8SJakub Kicinski 1125ee9133a8SJakub Kicinski mask = (1 << size) - 1; 1126ee9133a8SJakub Kicinski mask <<= dst_byte; 1127ee9133a8SJakub Kicinski 1128ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1129ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1130ee9133a8SJakub Kicinski 1131ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1132ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 1133ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 1134ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 1135ee9133a8SJakub Kicinski shf = 32 - shf; 1136ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 1137ee9133a8SJakub Kicinski } else { 1138ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 1139ee9133a8SJakub Kicinski } 1140ee9133a8SJakub Kicinski 1141ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1142ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1143ee9133a8SJakub Kicinski */ 1144ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 11452df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1146ee9133a8SJakub Kicinski } else { 1147ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 11489a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 11499a90c83cSJakub Kicinski * the middle location will be overwritten fully. 11509a90c83cSJakub Kicinski */ 11519a90c83cSJakub Kicinski if (first || last) 1152ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1153ee9133a8SJakub Kicinski } 1154ee9133a8SJakub Kicinski 1155ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 1156ee9133a8SJakub Kicinski 11579a90c83cSJakub Kicinski if (new_gpr || last) { 1158ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1159ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 11602df03a50SJakub Kicinski if (should_inc) 11612df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 11629a90c83cSJakub Kicinski } 1163ee9133a8SJakub Kicinski 1164ee9133a8SJakub Kicinski return 0; 1165ee9133a8SJakub Kicinski } 1166ee9133a8SJakub Kicinski 1167ee9133a8SJakub Kicinski static int 1168ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1169b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1170b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1171ee9133a8SJakub Kicinski { 11721a7e62e6SQuentin Monnet s32 off = nfp_prog->stack_frame_depth + meta->insn.off + ptr_off; 11739a90c83cSJakub Kicinski bool first = true, last; 11742df03a50SJakub Kicinski bool needs_inc = false; 11752df03a50SJakub Kicinski swreg stack_off_reg; 1176a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1177ee9133a8SJakub Kicinski u32 gpr_byte = 0; 11782df03a50SJakub Kicinski bool lm3 = true; 1179ee9133a8SJakub Kicinski int ret; 1180ee9133a8SJakub Kicinski 1181b14157eeSJakub Kicinski if (meta->ptr_not_const) { 1182b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1183b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1184b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1185b14157eeSJakub Kicinski */ 1186b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1187b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1188b14157eeSJakub Kicinski 1189b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1190b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1191b14157eeSJakub Kicinski 1192b14157eeSJakub Kicinski needs_inc = true; 1193b14157eeSJakub Kicinski } else if (off + size <= 64) { 11942df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 11952df03a50SJakub Kicinski lm3 = false; 11962df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 11972df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 11982df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 11992df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 12002df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 12012df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 12022df03a50SJakub Kicinski */ 12032df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 12042df03a50SJakub Kicinski stack_imm(nfp_prog)); 12052df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 12062df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 12072df03a50SJakub Kicinski 12082df03a50SJakub Kicinski off %= 32; 12092df03a50SJakub Kicinski } else { 12102df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 12112df03a50SJakub Kicinski stack_imm(nfp_prog)); 12122df03a50SJakub Kicinski 12132df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 12142df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 12152df03a50SJakub Kicinski 12162df03a50SJakub Kicinski needs_inc = true; 12172df03a50SJakub Kicinski } 12182df03a50SJakub Kicinski if (lm3) { 12192df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 12202df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 12212df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 12222df03a50SJakub Kicinski } 12232df03a50SJakub Kicinski 1224a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1225a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1226a82b23fbSJakub Kicinski 1227ee9133a8SJakub Kicinski while (size) { 1228ee9133a8SJakub Kicinski u32 slice_end; 1229ee9133a8SJakub Kicinski u8 slice_size; 1230ee9133a8SJakub Kicinski 1231ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1232ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1233ee9133a8SJakub Kicinski slice_size = slice_end - off; 1234ee9133a8SJakub Kicinski 12359a90c83cSJakub Kicinski last = slice_size == size; 12369a90c83cSJakub Kicinski 12372df03a50SJakub Kicinski if (needs_inc) 12382df03a50SJakub Kicinski off %= 4; 12392df03a50SJakub Kicinski 1240a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 12412df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1242ee9133a8SJakub Kicinski if (ret) 1243ee9133a8SJakub Kicinski return ret; 1244ee9133a8SJakub Kicinski 1245a82b23fbSJakub Kicinski prev_gpr = gpr; 12469a90c83cSJakub Kicinski first = false; 12479a90c83cSJakub Kicinski 1248ee9133a8SJakub Kicinski gpr_byte += slice_size; 1249ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1250ee9133a8SJakub Kicinski gpr_byte -= 4; 1251ee9133a8SJakub Kicinski gpr++; 1252ee9133a8SJakub Kicinski } 1253ee9133a8SJakub Kicinski 1254ee9133a8SJakub Kicinski size -= slice_size; 1255ee9133a8SJakub Kicinski off += slice_size; 1256ee9133a8SJakub Kicinski } 1257ee9133a8SJakub Kicinski 1258ee9133a8SJakub Kicinski return 0; 1259ee9133a8SJakub Kicinski } 1260ee9133a8SJakub Kicinski 1261d9ae7f2bSJakub Kicinski static void 1262d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1263d9ae7f2bSJakub Kicinski { 1264b3f868dfSJakub Kicinski swreg tmp_reg; 1265d9ae7f2bSJakub Kicinski 1266d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1267d9ae7f2bSJakub Kicinski if (!imm) 1268d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1269d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1270d9ae7f2bSJakub Kicinski return; 1271d9ae7f2bSJakub Kicinski } 1272d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1273d9ae7f2bSJakub Kicinski if (!~imm) 1274d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1275d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1276d9ae7f2bSJakub Kicinski return; 1277d9ae7f2bSJakub Kicinski } 1278d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1279d9ae7f2bSJakub Kicinski if (!~imm) 1280d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 12815d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1282d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1283d9ae7f2bSJakub Kicinski return; 1284d9ae7f2bSJakub Kicinski } 1285d9ae7f2bSJakub Kicinski 1286d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1287d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1288d9ae7f2bSJakub Kicinski } 1289d9ae7f2bSJakub Kicinski 1290d9ae7f2bSJakub Kicinski static int 1291d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1292d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1293d9ae7f2bSJakub Kicinski { 1294d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1295d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1296d9ae7f2bSJakub Kicinski 1297d9ae7f2bSJakub Kicinski if (skip) { 1298d9ae7f2bSJakub Kicinski meta->skip = true; 1299d9ae7f2bSJakub Kicinski return 0; 1300d9ae7f2bSJakub Kicinski } 1301d9ae7f2bSJakub Kicinski 1302d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1303d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1304d9ae7f2bSJakub Kicinski 1305d9ae7f2bSJakub Kicinski return 0; 1306d9ae7f2bSJakub Kicinski } 1307d9ae7f2bSJakub Kicinski 1308d9ae7f2bSJakub Kicinski static int 1309d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1310d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1311d9ae7f2bSJakub Kicinski { 1312d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1313d9ae7f2bSJakub Kicinski 1314d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1315d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1316d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1317d9ae7f2bSJakub Kicinski 1318d9ae7f2bSJakub Kicinski return 0; 1319d9ae7f2bSJakub Kicinski } 1320d9ae7f2bSJakub Kicinski 1321d9ae7f2bSJakub Kicinski static int 1322d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1323d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1324d9ae7f2bSJakub Kicinski { 1325d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1326d9ae7f2bSJakub Kicinski 1327d9ae7f2bSJakub Kicinski if (skip) { 1328d9ae7f2bSJakub Kicinski meta->skip = true; 1329d9ae7f2bSJakub Kicinski return 0; 1330d9ae7f2bSJakub Kicinski } 1331d9ae7f2bSJakub Kicinski 1332d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1333d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1334d9ae7f2bSJakub Kicinski 1335d9ae7f2bSJakub Kicinski return 0; 1336d9ae7f2bSJakub Kicinski } 1337d9ae7f2bSJakub Kicinski 1338d9ae7f2bSJakub Kicinski static int 1339d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1340d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1341d9ae7f2bSJakub Kicinski { 1342d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1343d9ae7f2bSJakub Kicinski 1344d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1345d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1346d9ae7f2bSJakub Kicinski 1347d9ae7f2bSJakub Kicinski return 0; 1348d9ae7f2bSJakub Kicinski } 1349d9ae7f2bSJakub Kicinski 1350d9ae7f2bSJakub Kicinski static void 1351d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1352d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1353d9ae7f2bSJakub Kicinski { 1354d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1355d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1356d9ae7f2bSJakub Kicinski } 1357d9ae7f2bSJakub Kicinski 1358d9ae7f2bSJakub Kicinski static int 1359d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1360d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1361d9ae7f2bSJakub Kicinski { 1362d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1363d9ae7f2bSJakub Kicinski 1364d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1365d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 1366d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1367d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1368d9ae7f2bSJakub Kicinski 1369d9ae7f2bSJakub Kicinski return 0; 1370d9ae7f2bSJakub Kicinski } 1371d9ae7f2bSJakub Kicinski 137261dd8f00SJakub Kicinski static const struct jmp_code_map { 137361dd8f00SJakub Kicinski enum br_mask br_mask; 137461dd8f00SJakub Kicinski bool swap; 137561dd8f00SJakub Kicinski } jmp_code_map[] = { 137661dd8f00SJakub Kicinski [BPF_JGT >> 4] = { BR_BLO, true }, 137761dd8f00SJakub Kicinski [BPF_JGE >> 4] = { BR_BHS, false }, 137861dd8f00SJakub Kicinski [BPF_JLT >> 4] = { BR_BLO, false }, 137961dd8f00SJakub Kicinski [BPF_JLE >> 4] = { BR_BHS, true }, 138061dd8f00SJakub Kicinski [BPF_JSGT >> 4] = { BR_BLT, true }, 138161dd8f00SJakub Kicinski [BPF_JSGE >> 4] = { BR_BGE, false }, 138261dd8f00SJakub Kicinski [BPF_JSLT >> 4] = { BR_BLT, false }, 138361dd8f00SJakub Kicinski [BPF_JSLE >> 4] = { BR_BGE, true }, 138461dd8f00SJakub Kicinski }; 138561dd8f00SJakub Kicinski 138661dd8f00SJakub Kicinski static const struct jmp_code_map *nfp_jmp_code_get(struct nfp_insn_meta *meta) 138761dd8f00SJakub Kicinski { 138861dd8f00SJakub Kicinski unsigned int op; 138961dd8f00SJakub Kicinski 139061dd8f00SJakub Kicinski op = BPF_OP(meta->insn.code) >> 4; 139161dd8f00SJakub Kicinski /* br_mask of 0 is BR_BEQ which we don't use in jump code table */ 139261dd8f00SJakub Kicinski if (WARN_ONCE(op >= ARRAY_SIZE(jmp_code_map) || 139361dd8f00SJakub Kicinski !jmp_code_map[op].br_mask, 139461dd8f00SJakub Kicinski "no code found for jump instruction")) 139561dd8f00SJakub Kicinski return NULL; 139661dd8f00SJakub Kicinski 139761dd8f00SJakub Kicinski return &jmp_code_map[op]; 139861dd8f00SJakub Kicinski } 139961dd8f00SJakub Kicinski 140061dd8f00SJakub Kicinski static int cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1401d9ae7f2bSJakub Kicinski { 1402d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1403d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 140461dd8f00SJakub Kicinski const struct jmp_code_map *code; 14057bdc97beSJakub Kicinski enum alu_op alu_op, carry_op; 1406d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1407b3f868dfSJakub Kicinski swreg tmp_reg; 1408d9ae7f2bSJakub Kicinski 140961dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 141061dd8f00SJakub Kicinski if (!code) 141161dd8f00SJakub Kicinski return -EINVAL; 141261dd8f00SJakub Kicinski 14137bdc97beSJakub Kicinski alu_op = meta->jump_neg_op ? ALU_OP_ADD : ALU_OP_SUB; 14147bdc97beSJakub Kicinski carry_op = meta->jump_neg_op ? ALU_OP_ADD_C : ALU_OP_SUB_C; 14157bdc97beSJakub Kicinski 1416d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 141761dd8f00SJakub Kicinski if (!code->swap) 14187bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), alu_op, tmp_reg); 1419d9ae7f2bSJakub Kicinski else 14207bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, alu_op, reg_a(reg)); 1421d9ae7f2bSJakub Kicinski 1422d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 142361dd8f00SJakub Kicinski if (!code->swap) 1424d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 14257bdc97beSJakub Kicinski reg_a(reg + 1), carry_op, tmp_reg); 1426d9ae7f2bSJakub Kicinski else 1427d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 14287bdc97beSJakub Kicinski tmp_reg, carry_op, reg_a(reg + 1)); 1429d9ae7f2bSJakub Kicinski 143061dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1431d9ae7f2bSJakub Kicinski 1432d9ae7f2bSJakub Kicinski return 0; 1433d9ae7f2bSJakub Kicinski } 1434d9ae7f2bSJakub Kicinski 143561dd8f00SJakub Kicinski static int cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1436d9ae7f2bSJakub Kicinski { 1437d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 143861dd8f00SJakub Kicinski const struct jmp_code_map *code; 143926fa818dSJakub Kicinski u8 areg, breg; 144026fa818dSJakub Kicinski 144161dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 144261dd8f00SJakub Kicinski if (!code) 144361dd8f00SJakub Kicinski return -EINVAL; 144461dd8f00SJakub Kicinski 144526fa818dSJakub Kicinski areg = insn->dst_reg * 2; 144626fa818dSJakub Kicinski breg = insn->src_reg * 2; 1447d9ae7f2bSJakub Kicinski 144861dd8f00SJakub Kicinski if (code->swap) { 1449d9ae7f2bSJakub Kicinski areg ^= breg; 1450d9ae7f2bSJakub Kicinski breg ^= areg; 1451d9ae7f2bSJakub Kicinski areg ^= breg; 1452d9ae7f2bSJakub Kicinski } 1453d9ae7f2bSJakub Kicinski 1454d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 1455d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1456d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 145761dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1458d9ae7f2bSJakub Kicinski 1459d9ae7f2bSJakub Kicinski return 0; 1460d9ae7f2bSJakub Kicinski } 1461d9ae7f2bSJakub Kicinski 14623119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 14633119d1fdSJakub Kicinski { 14643119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 14653119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 14663119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 14673119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 14683119d1fdSJakub Kicinski } 14693119d1fdSJakub Kicinski 1470d3d23fdbSJiong Wang static void 1471d3d23fdbSJiong Wang wrp_mul_u32(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1472d3d23fdbSJiong Wang swreg rreg, bool gen_high_half) 1473d3d23fdbSJiong Wang { 1474d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1475d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_1, rreg); 1476d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_2, rreg); 1477d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_3, rreg); 1478d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_4, rreg); 1479d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_32x32, MUL_LAST, reg_none()); 1480d3d23fdbSJiong Wang if (gen_high_half) 1481d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_hi, MUL_TYPE_STEP_32x32, MUL_LAST_2, 1482d3d23fdbSJiong Wang reg_none()); 1483d3d23fdbSJiong Wang else 1484d3d23fdbSJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1485d3d23fdbSJiong Wang } 1486d3d23fdbSJiong Wang 1487d3d23fdbSJiong Wang static void 1488d3d23fdbSJiong Wang wrp_mul_u16(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1489d3d23fdbSJiong Wang swreg rreg) 1490d3d23fdbSJiong Wang { 1491d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1492d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_1, rreg); 1493d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_2, rreg); 1494d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_16x16, MUL_LAST, reg_none()); 1495d3d23fdbSJiong Wang } 1496d3d23fdbSJiong Wang 1497d3d23fdbSJiong Wang static int 1498d3d23fdbSJiong Wang wrp_mul(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1499d3d23fdbSJiong Wang bool gen_high_half, bool ropnd_from_reg) 1500d3d23fdbSJiong Wang { 1501d3d23fdbSJiong Wang swreg multiplier, multiplicand, dst_hi, dst_lo; 1502d3d23fdbSJiong Wang const struct bpf_insn *insn = &meta->insn; 1503d3d23fdbSJiong Wang u32 lopnd_max, ropnd_max; 1504d3d23fdbSJiong Wang u8 dst_reg; 1505d3d23fdbSJiong Wang 1506d3d23fdbSJiong Wang dst_reg = insn->dst_reg; 1507d3d23fdbSJiong Wang multiplicand = reg_a(dst_reg * 2); 1508d3d23fdbSJiong Wang dst_hi = reg_both(dst_reg * 2 + 1); 1509d3d23fdbSJiong Wang dst_lo = reg_both(dst_reg * 2); 1510d3d23fdbSJiong Wang lopnd_max = meta->umax_dst; 1511d3d23fdbSJiong Wang if (ropnd_from_reg) { 1512d3d23fdbSJiong Wang multiplier = reg_b(insn->src_reg * 2); 1513d3d23fdbSJiong Wang ropnd_max = meta->umax_src; 1514d3d23fdbSJiong Wang } else { 1515d3d23fdbSJiong Wang u32 imm = insn->imm; 1516d3d23fdbSJiong Wang 1517d3d23fdbSJiong Wang multiplier = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1518d3d23fdbSJiong Wang ropnd_max = imm; 1519d3d23fdbSJiong Wang } 1520d3d23fdbSJiong Wang if (lopnd_max > U16_MAX || ropnd_max > U16_MAX) 1521d3d23fdbSJiong Wang wrp_mul_u32(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier, 1522d3d23fdbSJiong Wang gen_high_half); 1523d3d23fdbSJiong Wang else 1524d3d23fdbSJiong Wang wrp_mul_u16(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier); 1525d3d23fdbSJiong Wang 1526d3d23fdbSJiong Wang return 0; 1527d3d23fdbSJiong Wang } 1528d3d23fdbSJiong Wang 15292a952b03SJiong Wang static int wrp_div_imm(struct nfp_prog *nfp_prog, u8 dst, u64 imm) 15302a952b03SJiong Wang { 15312a952b03SJiong Wang swreg dst_both = reg_both(dst), dst_a = reg_a(dst), dst_b = reg_a(dst); 15329fb410a8SJiong Wang struct reciprocal_value_adv rvalue; 15339fb410a8SJiong Wang u8 pre_shift, exp; 15342a952b03SJiong Wang swreg magic; 15352a952b03SJiong Wang 15362a952b03SJiong Wang if (imm > U32_MAX) { 15372a952b03SJiong Wang wrp_immed(nfp_prog, dst_both, 0); 15382a952b03SJiong Wang return 0; 15392a952b03SJiong Wang } 15402a952b03SJiong Wang 15419fb410a8SJiong Wang /* NOTE: because we are using "reciprocal_value_adv" which doesn't 15429fb410a8SJiong Wang * support "divisor > (1u << 31)", we need to JIT separate NFP sequence 15439fb410a8SJiong Wang * to handle such case which actually equals to the result of unsigned 15449fb410a8SJiong Wang * comparison "dst >= imm" which could be calculated using the following 15459fb410a8SJiong Wang * NFP sequence: 15469fb410a8SJiong Wang * 15479fb410a8SJiong Wang * alu[--, dst, -, imm] 15489fb410a8SJiong Wang * immed[imm, 0] 15499fb410a8SJiong Wang * alu[dst, imm, +carry, 0] 15509fb410a8SJiong Wang * 15519fb410a8SJiong Wang */ 15529fb410a8SJiong Wang if (imm > 1U << 31) { 15539fb410a8SJiong Wang swreg tmp_b = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 15549fb410a8SJiong Wang 15559fb410a8SJiong Wang emit_alu(nfp_prog, reg_none(), dst_a, ALU_OP_SUB, tmp_b); 15569fb410a8SJiong Wang wrp_immed(nfp_prog, imm_a(nfp_prog), 0); 15579fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, imm_a(nfp_prog), ALU_OP_ADD_C, 15589fb410a8SJiong Wang reg_imm(0)); 15599fb410a8SJiong Wang return 0; 15609fb410a8SJiong Wang } 15619fb410a8SJiong Wang 15629fb410a8SJiong Wang rvalue = reciprocal_value_adv(imm, 32); 15639fb410a8SJiong Wang exp = rvalue.exp; 15649fb410a8SJiong Wang if (rvalue.is_wide_m && !(imm & 1)) { 15659fb410a8SJiong Wang pre_shift = fls(imm & -imm) - 1; 15669fb410a8SJiong Wang rvalue = reciprocal_value_adv(imm >> pre_shift, 32 - pre_shift); 15679fb410a8SJiong Wang } else { 15689fb410a8SJiong Wang pre_shift = 0; 15699fb410a8SJiong Wang } 15702a952b03SJiong Wang magic = ur_load_imm_any(nfp_prog, rvalue.m, imm_b(nfp_prog)); 15719fb410a8SJiong Wang if (imm == 1U << exp) { 15722a952b03SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15739fb410a8SJiong Wang SHF_SC_R_SHF, exp); 15749fb410a8SJiong Wang } else if (rvalue.is_wide_m) { 15759fb410a8SJiong Wang wrp_mul_u32(nfp_prog, imm_both(nfp_prog), reg_none(), dst_a, 15769fb410a8SJiong Wang magic, true); 15779fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, dst_a, ALU_OP_SUB, 15789fb410a8SJiong Wang imm_b(nfp_prog)); 15792a952b03SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15809fb410a8SJiong Wang SHF_SC_R_SHF, 1); 15819fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, dst_a, ALU_OP_ADD, 15829fb410a8SJiong Wang imm_b(nfp_prog)); 15839fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15849fb410a8SJiong Wang SHF_SC_R_SHF, rvalue.sh - 1); 15859fb410a8SJiong Wang } else { 15869fb410a8SJiong Wang if (pre_shift) 15879fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, 15889fb410a8SJiong Wang dst_b, SHF_SC_R_SHF, pre_shift); 15899fb410a8SJiong Wang wrp_mul_u32(nfp_prog, dst_both, reg_none(), dst_a, magic, true); 15909fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, 15919fb410a8SJiong Wang dst_b, SHF_SC_R_SHF, rvalue.sh); 15929fb410a8SJiong Wang } 15932a952b03SJiong Wang 15942a952b03SJiong Wang return 0; 15952a952b03SJiong Wang } 15962a952b03SJiong Wang 15970d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 15980d49eaf4SJakub Kicinski { 15990d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 16000d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 16010d49eaf4SJakub Kicinski u32 ret_einval, end; 16020d49eaf4SJakub Kicinski 16030d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 16040d49eaf4SJakub Kicinski 16058231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 16068231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 16078231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 16088231f844SJakub Kicinski return -EINVAL; 16098231f844SJakub Kicinski 16108231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 16118231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 16128231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 16138231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16148231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 16158231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16168231f844SJakub Kicinski 16178231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 16188231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 16198231f844SJakub Kicinski 16208231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 16218231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 16228231f844SJakub Kicinski */ 16238231f844SJakub Kicinski 16248231f844SJakub Kicinski return 0; 16258231f844SJakub Kicinski } 16268231f844SJakub Kicinski 16270d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 16280d49eaf4SJakub Kicinski end = ret_einval + 2; 16290d49eaf4SJakub Kicinski 16300d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 16310d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 16320d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 16330d49eaf4SJakub Kicinski 16340d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 16350d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16360d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 16370d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 16380d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16390d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 16400d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 16410d49eaf4SJakub Kicinski 16420d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 16430d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 16440d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16450d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16460d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 16470d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 16480d49eaf4SJakub Kicinski 16490d49eaf4SJakub Kicinski /* Load the ret code */ 16500d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 16510d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 16520d49eaf4SJakub Kicinski 16530d49eaf4SJakub Kicinski /* Modify the packet metadata */ 16540d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 16550d49eaf4SJakub Kicinski 16560d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 16572314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 16580d49eaf4SJakub Kicinski 16590d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 16600d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16610d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 16620d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16630d49eaf4SJakub Kicinski 16640d49eaf4SJakub Kicinski /* return -EINVAL target */ 16650d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 16660d49eaf4SJakub Kicinski return -EINVAL; 16670d49eaf4SJakub Kicinski 16680d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 16690d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 16700d49eaf4SJakub Kicinski 16710d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 16720d49eaf4SJakub Kicinski return -EINVAL; 16730d49eaf4SJakub Kicinski 16740d49eaf4SJakub Kicinski return 0; 16750d49eaf4SJakub Kicinski } 16760d49eaf4SJakub Kicinski 16770c261593SJakub Kicinski static int adjust_tail(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16780c261593SJakub Kicinski { 16790c261593SJakub Kicinski u32 ret_einval, end; 16800c261593SJakub Kicinski swreg plen, delta; 16810c261593SJakub Kicinski 16820c261593SJakub Kicinski BUILD_BUG_ON(plen_reg(nfp_prog) != reg_b(STATIC_REG_PKT_LEN)); 16830c261593SJakub Kicinski 16840c261593SJakub Kicinski plen = imm_a(nfp_prog); 16850c261593SJakub Kicinski delta = reg_a(2 * 2); 16860c261593SJakub Kicinski 16870c261593SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 9; 16880c261593SJakub Kicinski end = nfp_prog_current_offset(nfp_prog) + 11; 16890c261593SJakub Kicinski 16900c261593SJakub Kicinski /* Calculate resulting length */ 16910c261593SJakub Kicinski emit_alu(nfp_prog, plen, plen_reg(nfp_prog), ALU_OP_ADD, delta); 16920c261593SJakub Kicinski /* delta == 0 is not allowed by the kernel, add must overflow to make 16930c261593SJakub Kicinski * length smaller. 16940c261593SJakub Kicinski */ 16950c261593SJakub Kicinski emit_br(nfp_prog, BR_BCC, ret_einval, 0); 16960c261593SJakub Kicinski 16970c261593SJakub Kicinski /* if (new_len < 14) then -EINVAL */ 16980c261593SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen, ALU_OP_SUB, reg_imm(ETH_HLEN)); 16990c261593SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 17000c261593SJakub Kicinski 17010c261593SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 17020c261593SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, delta); 17030c261593SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 17040c261593SJakub Kicinski pv_len(nfp_prog), ALU_OP_ADD, delta); 17050c261593SJakub Kicinski 17060c261593SJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 17070c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 17080c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 17090c261593SJakub Kicinski 17100c261593SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 17110c261593SJakub Kicinski return -EINVAL; 17120c261593SJakub Kicinski 17130c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 17140c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 17150c261593SJakub Kicinski 17160c261593SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 17170c261593SJakub Kicinski return -EINVAL; 17180c261593SJakub Kicinski 17190c261593SJakub Kicinski return 0; 17200c261593SJakub Kicinski } 17210c261593SJakub Kicinski 172277a3d311SJakub Kicinski static int 1723fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 172477a3d311SJakub Kicinski { 172577a3d311SJakub Kicinski bool load_lm_ptr; 172677a3d311SJakub Kicinski u32 ret_tgt; 172777a3d311SJakub Kicinski s64 lm_off; 172877a3d311SJakub Kicinski 172977a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 17301a7e62e6SQuentin Monnet lm_off = nfp_prog->stack_frame_depth; 17312f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 17322f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 173377a3d311SJakub Kicinski 173477a3d311SJakub Kicinski /* Set LM0 to start of key */ 173577a3d311SJakub Kicinski if (load_lm_ptr) 173677a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 173744d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 173844d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 173977a3d311SJakub Kicinski 1740fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 174177a3d311SJakub Kicinski 2, RELO_BR_HELPER); 174277a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 174377a3d311SJakub Kicinski 174477a3d311SJakub Kicinski /* Load map ID into A0 */ 1745b4264c96SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), reg_a(2)); 174677a3d311SJakub Kicinski 174777a3d311SJakub Kicinski /* Load the return address into B0 */ 174877a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 174977a3d311SJakub Kicinski 175077a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 175177a3d311SJakub Kicinski return -EINVAL; 175277a3d311SJakub Kicinski 175377a3d311SJakub Kicinski /* Reset the LM0 pointer */ 175477a3d311SJakub Kicinski if (!load_lm_ptr) 175577a3d311SJakub Kicinski return 0; 175677a3d311SJakub Kicinski 175777a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 175877a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 175977a3d311SJakub Kicinski 176077a3d311SJakub Kicinski return 0; 176177a3d311SJakub Kicinski } 176277a3d311SJakub Kicinski 1763df4a37d8SJakub Kicinski static int 1764df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1765df4a37d8SJakub Kicinski { 1766df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1767df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1768df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1769df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1770df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1771df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1772df4a37d8SJakub Kicinski return 0; 1773df4a37d8SJakub Kicinski } 1774df4a37d8SJakub Kicinski 17759816dd35SJakub Kicinski static int 17769816dd35SJakub Kicinski nfp_perf_event_output(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 17779816dd35SJakub Kicinski { 17789816dd35SJakub Kicinski swreg ptr_type; 17799816dd35SJakub Kicinski u32 ret_tgt; 17809816dd35SJakub Kicinski 17819816dd35SJakub Kicinski ptr_type = ur_load_imm_any(nfp_prog, meta->arg1.type, imm_a(nfp_prog)); 17829816dd35SJakub Kicinski 17839816dd35SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 17849816dd35SJakub Kicinski 17859816dd35SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 17869816dd35SJakub Kicinski 2, RELO_BR_HELPER); 17879816dd35SJakub Kicinski 17889816dd35SJakub Kicinski /* Load ptr type into A1 */ 17899816dd35SJakub Kicinski wrp_mov(nfp_prog, reg_a(1), ptr_type); 17909816dd35SJakub Kicinski 17919816dd35SJakub Kicinski /* Load the return address into B0 */ 17929816dd35SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 17939816dd35SJakub Kicinski 17949816dd35SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 17959816dd35SJakub Kicinski return -EINVAL; 17969816dd35SJakub Kicinski 17979816dd35SJakub Kicinski return 0; 17989816dd35SJakub Kicinski } 17999816dd35SJakub Kicinski 1800d985888fSJakub Kicinski static int 1801d985888fSJakub Kicinski nfp_queue_select(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1802d985888fSJakub Kicinski { 1803d985888fSJakub Kicinski u32 jmp_tgt; 1804d985888fSJakub Kicinski 1805d985888fSJakub Kicinski jmp_tgt = nfp_prog_current_offset(nfp_prog) + 5; 1806d985888fSJakub Kicinski 1807d985888fSJakub Kicinski /* Make sure the queue id fits into FW field */ 1808d985888fSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(meta->insn.src_reg * 2), 1809d985888fSJakub Kicinski ALU_OP_AND_NOT_B, reg_imm(0xff)); 1810d985888fSJakub Kicinski emit_br(nfp_prog, BR_BEQ, jmp_tgt, 2); 1811d985888fSJakub Kicinski 1812d985888fSJakub Kicinski /* Set the 'queue selected' bit and the queue value */ 1813d985888fSJakub Kicinski emit_shf(nfp_prog, pv_qsel_set(nfp_prog), 1814d985888fSJakub Kicinski pv_qsel_set(nfp_prog), SHF_OP_OR, reg_imm(1), 1815d985888fSJakub Kicinski SHF_SC_L_SHF, PKT_VEL_QSEL_SET_BIT); 1816d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1817d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_b(meta->insn.src_reg * 2), 1818d985888fSJakub Kicinski SHF_SC_NONE, 0); 1819d985888fSJakub Kicinski /* Delay slots end here, we will jump over next instruction if queue 1820d985888fSJakub Kicinski * value fits into the field. 1821d985888fSJakub Kicinski */ 1822d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1823d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_imm(NFP_NET_RXR_MAX), 1824d985888fSJakub Kicinski SHF_SC_NONE, 0); 1825d985888fSJakub Kicinski 1826d985888fSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, jmp_tgt)) 1827d985888fSJakub Kicinski return -EINVAL; 1828d985888fSJakub Kicinski 1829d985888fSJakub Kicinski return 0; 1830d985888fSJakub Kicinski } 1831d985888fSJakub Kicinski 1832d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1833d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1834d9ae7f2bSJakub Kicinski { 1835d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1836b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1837b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1838d9ae7f2bSJakub Kicinski 1839b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1840b14157eeSJakub Kicinski swreg stack_depth_reg; 1841b14157eeSJakub Kicinski 1842b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 18431a7e62e6SQuentin Monnet nfp_prog->stack_frame_depth, 1844b14157eeSJakub Kicinski stack_imm(nfp_prog)); 18451a7e62e6SQuentin Monnet emit_alu(nfp_prog, reg_both(dst), stack_reg(nfp_prog), 18461a7e62e6SQuentin Monnet ALU_OP_ADD, stack_depth_reg); 1847b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1848b14157eeSJakub Kicinski } else { 1849b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1850b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1851b14157eeSJakub Kicinski } 1852d9ae7f2bSJakub Kicinski 1853d9ae7f2bSJakub Kicinski return 0; 1854d9ae7f2bSJakub Kicinski } 1855d9ae7f2bSJakub Kicinski 1856d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1857d9ae7f2bSJakub Kicinski { 1858d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1859d9ae7f2bSJakub Kicinski 1860d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1861d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1862d9ae7f2bSJakub Kicinski 1863d9ae7f2bSJakub Kicinski return 0; 1864d9ae7f2bSJakub Kicinski } 1865d9ae7f2bSJakub Kicinski 1866d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1867d9ae7f2bSJakub Kicinski { 1868d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1869d9ae7f2bSJakub Kicinski } 1870d9ae7f2bSJakub Kicinski 1871d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1872d9ae7f2bSJakub Kicinski { 1873d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1874d9ae7f2bSJakub Kicinski } 1875d9ae7f2bSJakub Kicinski 1876d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1877d9ae7f2bSJakub Kicinski { 1878d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1879d9ae7f2bSJakub Kicinski } 1880d9ae7f2bSJakub Kicinski 1881d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1882d9ae7f2bSJakub Kicinski { 1883d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1884d9ae7f2bSJakub Kicinski } 1885d9ae7f2bSJakub Kicinski 1886d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1887d9ae7f2bSJakub Kicinski { 1888d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1889d9ae7f2bSJakub Kicinski } 1890d9ae7f2bSJakub Kicinski 1891d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1892d9ae7f2bSJakub Kicinski { 1893d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1894d9ae7f2bSJakub Kicinski } 1895d9ae7f2bSJakub Kicinski 1896d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1897d9ae7f2bSJakub Kicinski { 1898d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1899d9ae7f2bSJakub Kicinski 1900d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1901d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1902d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1903d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1904d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1905d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1906d9ae7f2bSJakub Kicinski 1907d9ae7f2bSJakub Kicinski return 0; 1908d9ae7f2bSJakub Kicinski } 1909d9ae7f2bSJakub Kicinski 1910d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1911d9ae7f2bSJakub Kicinski { 1912d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1913d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1914d9ae7f2bSJakub Kicinski 1915d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1916d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1917d9ae7f2bSJakub Kicinski 1918d9ae7f2bSJakub Kicinski return 0; 1919d9ae7f2bSJakub Kicinski } 1920d9ae7f2bSJakub Kicinski 1921d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1922d9ae7f2bSJakub Kicinski { 1923d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1924d9ae7f2bSJakub Kicinski 1925d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1926d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1927d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1928d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1929d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1930d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1931d9ae7f2bSJakub Kicinski 1932d9ae7f2bSJakub Kicinski return 0; 1933d9ae7f2bSJakub Kicinski } 1934d9ae7f2bSJakub Kicinski 1935d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1936d9ae7f2bSJakub Kicinski { 1937d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1938d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1939d9ae7f2bSJakub Kicinski 1940d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1941d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1942d9ae7f2bSJakub Kicinski 1943d9ae7f2bSJakub Kicinski return 0; 1944d9ae7f2bSJakub Kicinski } 1945d9ae7f2bSJakub Kicinski 1946d3d23fdbSJiong Wang static int mul_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1947d3d23fdbSJiong Wang { 1948d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, true); 1949d3d23fdbSJiong Wang } 1950d3d23fdbSJiong Wang 1951d3d23fdbSJiong Wang static int mul_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1952d3d23fdbSJiong Wang { 1953d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, false); 1954d3d23fdbSJiong Wang } 1955d3d23fdbSJiong Wang 19562a952b03SJiong Wang static int div_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19572a952b03SJiong Wang { 19582a952b03SJiong Wang const struct bpf_insn *insn = &meta->insn; 19592a952b03SJiong Wang 19602a952b03SJiong Wang return wrp_div_imm(nfp_prog, insn->dst_reg * 2, insn->imm); 19612a952b03SJiong Wang } 19622a952b03SJiong Wang 19632a952b03SJiong Wang static int div_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19642a952b03SJiong Wang { 19652a952b03SJiong Wang /* NOTE: verifier hook has rejected cases for which verifier doesn't 19662a952b03SJiong Wang * know whether the source operand is constant or not. 19672a952b03SJiong Wang */ 19682a952b03SJiong Wang return wrp_div_imm(nfp_prog, meta->insn.dst_reg * 2, meta->umin_src); 19692a952b03SJiong Wang } 19702a952b03SJiong Wang 1971254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1972254ef4d7SJiong Wang { 1973254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1974254ef4d7SJiong Wang 1975254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1976254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1977254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1978254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1979254ef4d7SJiong Wang 1980254ef4d7SJiong Wang return 0; 1981254ef4d7SJiong Wang } 1982254ef4d7SJiong Wang 1983991f5b36SJiong Wang /* Pseudo code: 1984991f5b36SJiong Wang * if shift_amt >= 32 1985991f5b36SJiong Wang * dst_high = dst_low << shift_amt[4:0] 1986991f5b36SJiong Wang * dst_low = 0; 1987991f5b36SJiong Wang * else 1988991f5b36SJiong Wang * dst_high = (dst_high, dst_low) >> (32 - shift_amt) 1989991f5b36SJiong Wang * dst_low = dst_low << shift_amt 1990991f5b36SJiong Wang * 1991991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1992991f5b36SJiong Wang */ 1993991f5b36SJiong Wang static int __shl_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1994991f5b36SJiong Wang { 1995991f5b36SJiong Wang if (shift_amt < 32) { 1996991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), 1997991f5b36SJiong Wang SHF_OP_NONE, reg_b(dst), SHF_SC_R_DSHF, 1998991f5b36SJiong Wang 32 - shift_amt); 1999991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2000991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 2001991f5b36SJiong Wang } else if (shift_amt == 32) { 2002991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst + 1, dst); 2003991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 2004991f5b36SJiong Wang } else if (shift_amt > 32) { 2005991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2006991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt - 32); 2007991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 2008991f5b36SJiong Wang } 2009991f5b36SJiong Wang 2010991f5b36SJiong Wang return 0; 2011991f5b36SJiong Wang } 2012991f5b36SJiong Wang 2013d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2014d9ae7f2bSJakub Kicinski { 2015d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 20163cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 2017d9ae7f2bSJakub Kicinski 2018991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, insn->imm); 2019991f5b36SJiong Wang } 2020991f5b36SJiong Wang 2021991f5b36SJiong Wang static void shl_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2022991f5b36SJiong Wang { 2023991f5b36SJiong Wang emit_alu(nfp_prog, imm_both(nfp_prog), reg_imm(32), ALU_OP_SUB, 2024991f5b36SJiong Wang reg_b(src)); 2025991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, reg_imm(0)); 2026991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), SHF_OP_NONE, 2027991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 2028991f5b36SJiong Wang } 2029991f5b36SJiong Wang 2030991f5b36SJiong Wang /* NOTE: for indirect left shift, HIGH part should be calculated first. */ 2031991f5b36SJiong Wang static void shl_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2032991f5b36SJiong Wang { 2033991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2034991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2035991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 2036991f5b36SJiong Wang } 2037991f5b36SJiong Wang 2038991f5b36SJiong Wang static void shl_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2039991f5b36SJiong Wang { 2040991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 2041991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2042991f5b36SJiong Wang } 2043991f5b36SJiong Wang 2044991f5b36SJiong Wang static void shl_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2045991f5b36SJiong Wang { 2046991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2047991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2048991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 20493cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 2050991f5b36SJiong Wang } 2051991f5b36SJiong Wang 2052991f5b36SJiong Wang static int shl_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2053991f5b36SJiong Wang { 2054991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2055991f5b36SJiong Wang u64 umin, umax; 2056991f5b36SJiong Wang u8 dst, src; 2057991f5b36SJiong Wang 2058991f5b36SJiong Wang dst = insn->dst_reg * 2; 2059662c5472SJiong Wang umin = meta->umin_src; 2060662c5472SJiong Wang umax = meta->umax_src; 2061991f5b36SJiong Wang if (umin == umax) 2062991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, umin); 2063991f5b36SJiong Wang 2064991f5b36SJiong Wang src = insn->src_reg * 2; 2065991f5b36SJiong Wang if (umax < 32) { 2066991f5b36SJiong Wang shl_reg64_lt32(nfp_prog, dst, src); 2067991f5b36SJiong Wang } else if (umin >= 32) { 2068991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 2069991f5b36SJiong Wang } else { 2070991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2071991f5b36SJiong Wang * value of shift amount. 2072991f5b36SJiong Wang */ 2073991f5b36SJiong Wang u16 label_ge32, label_end; 2074991f5b36SJiong Wang 2075991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 7; 2076991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2077991f5b36SJiong Wang 2078991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 2079991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2080991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2081991f5b36SJiong Wang /* shl_reg64_lt32_low packed in delay slot. */ 2082991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2083991f5b36SJiong Wang 2084991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2085991f5b36SJiong Wang return -EINVAL; 2086991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 2087991f5b36SJiong Wang 2088991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2089991f5b36SJiong Wang return -EINVAL; 2090991f5b36SJiong Wang } 2091991f5b36SJiong Wang 2092991f5b36SJiong Wang return 0; 2093991f5b36SJiong Wang } 2094991f5b36SJiong Wang 2095991f5b36SJiong Wang /* Pseudo code: 2096991f5b36SJiong Wang * if shift_amt >= 32 2097991f5b36SJiong Wang * dst_high = 0; 2098991f5b36SJiong Wang * dst_low = dst_high >> shift_amt[4:0] 2099991f5b36SJiong Wang * else 2100991f5b36SJiong Wang * dst_high = dst_high >> shift_amt 2101991f5b36SJiong Wang * dst_low = (dst_high, dst_low) >> shift_amt 2102991f5b36SJiong Wang * 2103991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 2104991f5b36SJiong Wang */ 2105991f5b36SJiong Wang static int __shr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2106991f5b36SJiong Wang { 2107991f5b36SJiong Wang if (shift_amt < 32) { 2108991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2109991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2110991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2111991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2112991f5b36SJiong Wang } else if (shift_amt == 32) { 2113991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2114991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2115991f5b36SJiong Wang } else if (shift_amt > 32) { 2116991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2117991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2118991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 21193cae1319SJakub Kicinski } 2120d9ae7f2bSJakub Kicinski 2121d9ae7f2bSJakub Kicinski return 0; 2122d9ae7f2bSJakub Kicinski } 2123d9ae7f2bSJakub Kicinski 2124d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2125d9ae7f2bSJakub Kicinski { 2126d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 21273cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 2128d9ae7f2bSJakub Kicinski 2129991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, insn->imm); 2130991f5b36SJiong Wang } 2131991f5b36SJiong Wang 2132991f5b36SJiong Wang /* NOTE: for indirect right shift, LOW part should be calculated first. */ 2133991f5b36SJiong Wang static void shr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2134991f5b36SJiong Wang { 2135991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2136991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2137991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2138991f5b36SJiong Wang } 2139991f5b36SJiong Wang 2140991f5b36SJiong Wang static void shr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2141991f5b36SJiong Wang { 2142991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2143991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2144991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 2145991f5b36SJiong Wang } 2146991f5b36SJiong Wang 2147991f5b36SJiong Wang static void shr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2148991f5b36SJiong Wang { 2149991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2150991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2151991f5b36SJiong Wang } 2152991f5b36SJiong Wang 2153991f5b36SJiong Wang static void shr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2154991f5b36SJiong Wang { 2155991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2156991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2157991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 21583cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2159991f5b36SJiong Wang } 2160991f5b36SJiong Wang 2161991f5b36SJiong Wang static int shr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2162991f5b36SJiong Wang { 2163991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2164991f5b36SJiong Wang u64 umin, umax; 2165991f5b36SJiong Wang u8 dst, src; 2166991f5b36SJiong Wang 2167991f5b36SJiong Wang dst = insn->dst_reg * 2; 2168662c5472SJiong Wang umin = meta->umin_src; 2169662c5472SJiong Wang umax = meta->umax_src; 2170991f5b36SJiong Wang if (umin == umax) 2171991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, umin); 2172991f5b36SJiong Wang 2173991f5b36SJiong Wang src = insn->src_reg * 2; 2174991f5b36SJiong Wang if (umax < 32) { 2175991f5b36SJiong Wang shr_reg64_lt32(nfp_prog, dst, src); 2176991f5b36SJiong Wang } else if (umin >= 32) { 2177991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2178991f5b36SJiong Wang } else { 2179991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2180991f5b36SJiong Wang * value of shift amount. 2181991f5b36SJiong Wang */ 2182991f5b36SJiong Wang u16 label_ge32, label_end; 2183991f5b36SJiong Wang 2184991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2185991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2186991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2187991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2188991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2189991f5b36SJiong Wang /* shr_reg64_lt32_high packed in delay slot. */ 2190991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2191991f5b36SJiong Wang 2192991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2193991f5b36SJiong Wang return -EINVAL; 2194991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2195991f5b36SJiong Wang 2196991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2197991f5b36SJiong Wang return -EINVAL; 21983cae1319SJakub Kicinski } 2199d9ae7f2bSJakub Kicinski 2200d9ae7f2bSJakub Kicinski return 0; 2201d9ae7f2bSJakub Kicinski } 2202d9ae7f2bSJakub Kicinski 2203f43d0f17SJiong Wang /* Code logic is the same as __shr_imm64 except ashr requires signedness bit 2204f43d0f17SJiong Wang * told through PREV_ALU result. 2205f43d0f17SJiong Wang */ 2206c217abccSJiong Wang static int __ashr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2207c217abccSJiong Wang { 2208c217abccSJiong Wang if (shift_amt < 32) { 2209c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2210c217abccSJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2211c217abccSJiong Wang /* Set signedness bit. */ 2212c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2213c217abccSJiong Wang reg_imm(0)); 2214c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2215c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2216c217abccSJiong Wang } else if (shift_amt == 32) { 2217c217abccSJiong Wang /* NOTE: this also helps setting signedness bit. */ 2218c217abccSJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2219c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2220c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2221c217abccSJiong Wang } else if (shift_amt > 32) { 2222c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2223c217abccSJiong Wang reg_imm(0)); 2224c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2225c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2226c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2227c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2228c217abccSJiong Wang } 2229c217abccSJiong Wang 2230c217abccSJiong Wang return 0; 2231c217abccSJiong Wang } 2232c217abccSJiong Wang 2233f43d0f17SJiong Wang static int ashr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2234f43d0f17SJiong Wang { 2235f43d0f17SJiong Wang const struct bpf_insn *insn = &meta->insn; 2236f43d0f17SJiong Wang u8 dst = insn->dst_reg * 2; 2237f43d0f17SJiong Wang 2238c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, insn->imm); 2239c217abccSJiong Wang } 2240c217abccSJiong Wang 2241c217abccSJiong Wang static void ashr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2242c217abccSJiong Wang { 2243c217abccSJiong Wang /* NOTE: the first insn will set both indirect shift amount (source A) 2244c217abccSJiong Wang * and signedness bit (MSB of result). 2245c217abccSJiong Wang */ 2246c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2247c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2248c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2249c217abccSJiong Wang } 2250c217abccSJiong Wang 2251c217abccSJiong Wang static void ashr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2252c217abccSJiong Wang { 2253c217abccSJiong Wang /* NOTE: it is the same as logic shift because we don't need to shift in 2254c217abccSJiong Wang * signedness bit when the shift amount is less than 32. 2255c217abccSJiong Wang */ 2256c217abccSJiong Wang return shr_reg64_lt32_low(nfp_prog, dst, src); 2257c217abccSJiong Wang } 2258c217abccSJiong Wang 2259c217abccSJiong Wang static void ashr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2260c217abccSJiong Wang { 2261c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2262c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2263c217abccSJiong Wang } 2264c217abccSJiong Wang 2265c217abccSJiong Wang static void ashr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2266c217abccSJiong Wang { 2267c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2268c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2269c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2270f43d0f17SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2271f43d0f17SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2272c217abccSJiong Wang } 2273c217abccSJiong Wang 2274c217abccSJiong Wang /* Like ashr_imm64, but need to use indirect shift. */ 2275c217abccSJiong Wang static int ashr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2276c217abccSJiong Wang { 2277c217abccSJiong Wang const struct bpf_insn *insn = &meta->insn; 2278c217abccSJiong Wang u64 umin, umax; 2279c217abccSJiong Wang u8 dst, src; 2280c217abccSJiong Wang 2281c217abccSJiong Wang dst = insn->dst_reg * 2; 2282662c5472SJiong Wang umin = meta->umin_src; 2283662c5472SJiong Wang umax = meta->umax_src; 2284c217abccSJiong Wang if (umin == umax) 2285c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, umin); 2286c217abccSJiong Wang 2287c217abccSJiong Wang src = insn->src_reg * 2; 2288c217abccSJiong Wang if (umax < 32) { 2289c217abccSJiong Wang ashr_reg64_lt32(nfp_prog, dst, src); 2290c217abccSJiong Wang } else if (umin >= 32) { 2291c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2292c217abccSJiong Wang } else { 2293c217abccSJiong Wang u16 label_ge32, label_end; 2294c217abccSJiong Wang 2295c217abccSJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2296c217abccSJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2297c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2298c217abccSJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2299c217abccSJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2300c217abccSJiong Wang /* ashr_reg64_lt32_high packed in delay slot. */ 2301c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2302c217abccSJiong Wang 2303c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2304c217abccSJiong Wang return -EINVAL; 2305c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2306c217abccSJiong Wang 2307c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2308c217abccSJiong Wang return -EINVAL; 2309f43d0f17SJiong Wang } 2310f43d0f17SJiong Wang 2311f43d0f17SJiong Wang return 0; 2312f43d0f17SJiong Wang } 2313f43d0f17SJiong Wang 2314d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2315d9ae7f2bSJakub Kicinski { 2316d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2317d9ae7f2bSJakub Kicinski 2318d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 2319d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2320d9ae7f2bSJakub Kicinski 2321d9ae7f2bSJakub Kicinski return 0; 2322d9ae7f2bSJakub Kicinski } 2323d9ae7f2bSJakub Kicinski 2324d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2325d9ae7f2bSJakub Kicinski { 2326d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2327d9ae7f2bSJakub Kicinski 2328d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 2329d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2330d9ae7f2bSJakub Kicinski 2331d9ae7f2bSJakub Kicinski return 0; 2332d9ae7f2bSJakub Kicinski } 2333d9ae7f2bSJakub Kicinski 2334d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2335d9ae7f2bSJakub Kicinski { 2336d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 2337d9ae7f2bSJakub Kicinski } 2338d9ae7f2bSJakub Kicinski 2339d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2340d9ae7f2bSJakub Kicinski { 2341d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR, !~meta->insn.imm); 2342d9ae7f2bSJakub Kicinski } 2343d9ae7f2bSJakub Kicinski 2344d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2345d9ae7f2bSJakub Kicinski { 2346d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 2347d9ae7f2bSJakub Kicinski } 2348d9ae7f2bSJakub Kicinski 2349d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2350d9ae7f2bSJakub Kicinski { 2351d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 2352d9ae7f2bSJakub Kicinski } 2353d9ae7f2bSJakub Kicinski 2354d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2355d9ae7f2bSJakub Kicinski { 2356d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 2357d9ae7f2bSJakub Kicinski } 2358d9ae7f2bSJakub Kicinski 2359d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2360d9ae7f2bSJakub Kicinski { 2361d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 2362d9ae7f2bSJakub Kicinski } 2363d9ae7f2bSJakub Kicinski 2364d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2365d9ae7f2bSJakub Kicinski { 2366d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 2367d9ae7f2bSJakub Kicinski } 2368d9ae7f2bSJakub Kicinski 2369d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2370d9ae7f2bSJakub Kicinski { 2371d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD, !meta->insn.imm); 2372d9ae7f2bSJakub Kicinski } 2373d9ae7f2bSJakub Kicinski 2374d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2375d9ae7f2bSJakub Kicinski { 2376d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 2377d9ae7f2bSJakub Kicinski } 2378d9ae7f2bSJakub Kicinski 2379d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2380d9ae7f2bSJakub Kicinski { 2381d9ae7f2bSJakub Kicinski return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB, !meta->insn.imm); 2382d9ae7f2bSJakub Kicinski } 2383d9ae7f2bSJakub Kicinski 2384d3d23fdbSJiong Wang static int mul_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2385d3d23fdbSJiong Wang { 2386d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, true); 2387d3d23fdbSJiong Wang } 2388d3d23fdbSJiong Wang 2389d3d23fdbSJiong Wang static int mul_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2390d3d23fdbSJiong Wang { 2391d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, false); 2392d3d23fdbSJiong Wang } 2393d3d23fdbSJiong Wang 23942a952b03SJiong Wang static int div_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23952a952b03SJiong Wang { 23962a952b03SJiong Wang return div_reg64(nfp_prog, meta); 23972a952b03SJiong Wang } 23982a952b03SJiong Wang 23992a952b03SJiong Wang static int div_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24002a952b03SJiong Wang { 24012a952b03SJiong Wang return div_imm64(nfp_prog, meta); 24022a952b03SJiong Wang } 24032a952b03SJiong Wang 2404254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2405254ef4d7SJiong Wang { 2406254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 2407254ef4d7SJiong Wang 2408254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 2409254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2410254ef4d7SJiong Wang 2411254ef4d7SJiong Wang return 0; 2412254ef4d7SJiong Wang } 2413254ef4d7SJiong Wang 2414d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2415d9ae7f2bSJakub Kicinski { 2416d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2417d9ae7f2bSJakub Kicinski 2418d9ae7f2bSJakub Kicinski if (!insn->imm) 2419d9ae7f2bSJakub Kicinski return 1; /* TODO: zero shift means indirect */ 2420d9ae7f2bSJakub Kicinski 2421d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_both(insn->dst_reg * 2), 2422d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(insn->dst_reg * 2), 2423d9ae7f2bSJakub Kicinski SHF_SC_L_SHF, insn->imm); 2424d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2425d9ae7f2bSJakub Kicinski 2426d9ae7f2bSJakub Kicinski return 0; 2427d9ae7f2bSJakub Kicinski } 2428d9ae7f2bSJakub Kicinski 24293119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24303119d1fdSJakub Kicinski { 24313119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 24323119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 24333119d1fdSJakub Kicinski 24343119d1fdSJakub Kicinski switch (insn->imm) { 24353119d1fdSJakub Kicinski case 16: 24363119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 24373119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 24383119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 24393119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 24403119d1fdSJakub Kicinski 24413119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 24423119d1fdSJakub Kicinski break; 24433119d1fdSJakub Kicinski case 32: 24443119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 24453119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 24463119d1fdSJakub Kicinski break; 24473119d1fdSJakub Kicinski case 64: 24483119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 24493119d1fdSJakub Kicinski 24503119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 24513119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 24523119d1fdSJakub Kicinski break; 24533119d1fdSJakub Kicinski } 24543119d1fdSJakub Kicinski 24553119d1fdSJakub Kicinski return 0; 24563119d1fdSJakub Kicinski } 24573119d1fdSJakub Kicinski 2458d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2459d9ae7f2bSJakub Kicinski { 24609f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 24619f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 24629f16c8abSJakub Kicinski u8 dst; 24639f16c8abSJakub Kicinski 24649f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 24659f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 24669f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 24679f16c8abSJakub Kicinski 24689f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 24699f16c8abSJakub Kicinski 24709f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 24719f16c8abSJakub Kicinski if (imm_hi == imm_lo) 24729f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 24739f16c8abSJakub Kicinski else 24749f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 2475d9ae7f2bSJakub Kicinski 2476d9ae7f2bSJakub Kicinski return 0; 2477d9ae7f2bSJakub Kicinski } 2478d9ae7f2bSJakub Kicinski 2479d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2480d9ae7f2bSJakub Kicinski { 2481d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 2482d9ae7f2bSJakub Kicinski return 0; 2483d9ae7f2bSJakub Kicinski } 2484d9ae7f2bSJakub Kicinski 2485d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2486d9ae7f2bSJakub Kicinski { 2487d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 2488d9ae7f2bSJakub Kicinski } 2489d9ae7f2bSJakub Kicinski 2490d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2491d9ae7f2bSJakub Kicinski { 2492d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 2493d9ae7f2bSJakub Kicinski } 2494d9ae7f2bSJakub Kicinski 2495d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2496d9ae7f2bSJakub Kicinski { 2497d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 2498d9ae7f2bSJakub Kicinski } 2499d9ae7f2bSJakub Kicinski 2500d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2501d9ae7f2bSJakub Kicinski { 2502d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 25030a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 2504d9ae7f2bSJakub Kicinski } 2505d9ae7f2bSJakub Kicinski 2506d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2507d9ae7f2bSJakub Kicinski { 2508d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 25090a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 2510d9ae7f2bSJakub Kicinski } 2511d9ae7f2bSJakub Kicinski 2512d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2513d9ae7f2bSJakub Kicinski { 2514d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 25150a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 2516d9ae7f2bSJakub Kicinski } 2517d9ae7f2bSJakub Kicinski 2518a82b23fbSJakub Kicinski static int 2519a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2520d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2521a82b23fbSJakub Kicinski { 2522d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2523b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 2524b14157eeSJakub Kicinski true, wrp_lmem_load); 2525a82b23fbSJakub Kicinski } 2526a82b23fbSJakub Kicinski 2527943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2528943c57b9SJakub Kicinski u8 size) 2529d9ae7f2bSJakub Kicinski { 2530bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2531bfddbc8aSJakub Kicinski 2532943c57b9SJakub Kicinski switch (meta->insn.off) { 2533c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 2534c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 2535943c57b9SJakub Kicinski return -EOPNOTSUPP; 2536bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 2537bfddbc8aSJakub Kicinski break; 2538c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 2539c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 2540bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2541bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2542bfddbc8aSJakub Kicinski break; 2543c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 2544c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 2545bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2546bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 2547bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2548943c57b9SJakub Kicinski break; 2549943c57b9SJakub Kicinski default: 2550d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2551943c57b9SJakub Kicinski } 2552943c57b9SJakub Kicinski 2553943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2554d9ae7f2bSJakub Kicinski 2555d9ae7f2bSJakub Kicinski return 0; 2556d9ae7f2bSJakub Kicinski } 2557d9ae7f2bSJakub Kicinski 2558943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2559943c57b9SJakub Kicinski u8 size) 2560d9ae7f2bSJakub Kicinski { 2561b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2562d9ae7f2bSJakub Kicinski 2563943c57b9SJakub Kicinski switch (meta->insn.off) { 2564c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 2565c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 2566c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2567c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2568943c57b9SJakub Kicinski break; 2569c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 2570c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 2571c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2572943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 2573943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2574943c57b9SJakub Kicinski break; 2575943c57b9SJakub Kicinski default: 2576943c57b9SJakub Kicinski return -EOPNOTSUPP; 2577943c57b9SJakub Kicinski } 2578d9ae7f2bSJakub Kicinski 2579943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2580d9ae7f2bSJakub Kicinski 2581d9ae7f2bSJakub Kicinski return 0; 2582d9ae7f2bSJakub Kicinski } 2583d9ae7f2bSJakub Kicinski 25842ca71441SJakub Kicinski static int 25852ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 25862ca71441SJakub Kicinski unsigned int size) 25872ca71441SJakub Kicinski { 25882ca71441SJakub Kicinski swreg tmp_reg; 25892ca71441SJakub Kicinski 25902ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 25912ca71441SJakub Kicinski 25923dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 25933dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 25943dd43c33SJakub Kicinski } 25953dd43c33SJakub Kicinski 25963dd43c33SJakub Kicinski static int 25973dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 25983dd43c33SJakub Kicinski unsigned int size) 25993dd43c33SJakub Kicinski { 26003dd43c33SJakub Kicinski swreg tmp_reg; 26013dd43c33SJakub Kicinski 26023dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 26033dd43c33SJakub Kicinski 26043dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 26053dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 26062ca71441SJakub Kicinski } 26072ca71441SJakub Kicinski 2608be759237SJiong Wang static void 2609be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 2610be759237SJiong Wang struct nfp_insn_meta *meta) 2611be759237SJiong Wang { 2612be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 2613be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 2614be759237SJiong Wang swreg src_base, off; 2615be759237SJiong Wang u8 xfer_num, len; 2616be759237SJiong Wang bool indir; 2617be759237SJiong Wang 2618be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 2619be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 2620be759237SJiong Wang len = range_end - range_start; 2621be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 2622be759237SJiong Wang 2623be759237SJiong Wang indir = len > 8 * REG_WIDTH; 2624be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 2625be759237SJiong Wang if (indir) 2626be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 2627be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 2628be759237SJiong Wang 2629be759237SJiong Wang /* Cache memory into transfer-in registers. */ 2630be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 2631b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 2632be759237SJiong Wang } 2633be759237SJiong Wang 2634be759237SJiong Wang static int 263591ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 263691ff69e8SJiong Wang struct nfp_insn_meta *meta, 263791ff69e8SJiong Wang unsigned int size) 263891ff69e8SJiong Wang { 263991ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 264091ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 264191ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 264291ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 264391ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 264491ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 264591ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 264691ff69e8SJiong Wang 264791ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 264891ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 264991ff69e8SJiong Wang src_lo = reg_xfer(idx); 265091ff69e8SJiong Wang 265191ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 265291ff69e8SJiong Wang if (size > REG_WIDTH - off) { 265391ff69e8SJiong Wang /* Calculate the part in the second register. */ 265491ff69e8SJiong Wang len_lo = REG_WIDTH - off; 265591ff69e8SJiong Wang len_mid = size - len_lo; 265691ff69e8SJiong Wang 265791ff69e8SJiong Wang /* Calculate the part in the third register. */ 265891ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 265991ff69e8SJiong Wang len_mid = REG_WIDTH; 266091ff69e8SJiong Wang } 266191ff69e8SJiong Wang 266291ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 266391ff69e8SJiong Wang 266491ff69e8SJiong Wang if (!len_mid) { 266591ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 266691ff69e8SJiong Wang return 0; 266791ff69e8SJiong Wang } 266891ff69e8SJiong Wang 266991ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 267091ff69e8SJiong Wang 267191ff69e8SJiong Wang if (size <= REG_WIDTH) { 267291ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 267391ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 267491ff69e8SJiong Wang } else { 267591ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 267691ff69e8SJiong Wang 267791ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 267891ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 267991ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 268091ff69e8SJiong Wang REG_WIDTH - len_lo); 268191ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 268291ff69e8SJiong Wang len_lo); 268391ff69e8SJiong Wang } 268491ff69e8SJiong Wang 268591ff69e8SJiong Wang return 0; 268691ff69e8SJiong Wang } 268791ff69e8SJiong Wang 268891ff69e8SJiong Wang static int 2689be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 2690be759237SJiong Wang struct nfp_insn_meta *meta, 2691be759237SJiong Wang unsigned int size) 2692be759237SJiong Wang { 2693be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 2694be759237SJiong Wang u8 dst_gpr, idx; 2695be759237SJiong Wang 2696be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 2697be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 2698be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 2699be759237SJiong Wang dst_lo = reg_both(dst_gpr); 2700be759237SJiong Wang src_lo = reg_xfer(idx); 2701be759237SJiong Wang 2702be759237SJiong Wang if (size < REG_WIDTH) { 2703be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 2704be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2705be759237SJiong Wang } else if (size == REG_WIDTH) { 2706be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2707be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2708be759237SJiong Wang } else { 2709be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 2710be759237SJiong Wang 2711be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2712be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 2713be759237SJiong Wang } 2714be759237SJiong Wang 2715be759237SJiong Wang return 0; 2716be759237SJiong Wang } 2717be759237SJiong Wang 2718be759237SJiong Wang static int 2719be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 2720be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 2721be759237SJiong Wang { 2722be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 2723be759237SJiong Wang 272491ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 2725be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 272691ff69e8SJiong Wang 272791ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 2728be759237SJiong Wang } 2729be759237SJiong Wang 27302ca71441SJakub Kicinski static int 27312ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 27322ca71441SJakub Kicinski unsigned int size) 27332ca71441SJakub Kicinski { 27349879a381SJiong Wang if (meta->ldst_gather_len) 27359879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 27369879a381SJiong Wang 27372ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2738012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 27392ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 27402ca71441SJakub Kicinski else 27412ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 27422ca71441SJakub Kicinski } 27432ca71441SJakub Kicinski 2744be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2745be759237SJiong Wang if (meta->pkt_cache.range_end) { 2746be759237SJiong Wang if (meta->pkt_cache.do_init) 2747be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2748be759237SJiong Wang 2749be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2750be759237SJiong Wang } else { 27512ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2752be759237SJiong Wang } 2753be759237SJiong Wang } 27542ca71441SJakub Kicinski 2755a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2756d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2757d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2758a82b23fbSJakub Kicinski 27593dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 27603dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 27613dd43c33SJakub Kicinski 27622ca71441SJakub Kicinski return -EOPNOTSUPP; 27632ca71441SJakub Kicinski } 27642ca71441SJakub Kicinski 27652ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 27662ca71441SJakub Kicinski { 27672ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 27682ca71441SJakub Kicinski } 27692ca71441SJakub Kicinski 27702ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 27712ca71441SJakub Kicinski { 27722ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 27732ca71441SJakub Kicinski } 27742ca71441SJakub Kicinski 2775d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2776d9ae7f2bSJakub Kicinski { 27772ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 27782ca71441SJakub Kicinski } 27792ca71441SJakub Kicinski 27802ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 27812ca71441SJakub Kicinski { 27822ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2783d9ae7f2bSJakub Kicinski } 2784d9ae7f2bSJakub Kicinski 2785e663fe38SJakub Kicinski static int 2786e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2787e663fe38SJakub Kicinski unsigned int size) 2788d9ae7f2bSJakub Kicinski { 2789e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2790e663fe38SJakub Kicinski swreg off_reg; 2791e663fe38SJakub Kicinski 2792e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2793e663fe38SJakub Kicinski 2794e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2795e663fe38SJakub Kicinski imm, size); 2796e663fe38SJakub Kicinski } 2797e663fe38SJakub Kicinski 2798e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2799e663fe38SJakub Kicinski unsigned int size) 2800e663fe38SJakub Kicinski { 2801e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2802e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2803e663fe38SJakub Kicinski 2804d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2805d9ae7f2bSJakub Kicinski } 2806d9ae7f2bSJakub Kicinski 2807e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2808d9ae7f2bSJakub Kicinski { 2809e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2810e663fe38SJakub Kicinski } 2811e663fe38SJakub Kicinski 2812e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2813e663fe38SJakub Kicinski { 2814e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2815e663fe38SJakub Kicinski } 2816e663fe38SJakub Kicinski 2817e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2818e663fe38SJakub Kicinski { 2819e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2820e663fe38SJakub Kicinski } 2821e663fe38SJakub Kicinski 2822e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2823e663fe38SJakub Kicinski { 2824e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2825e663fe38SJakub Kicinski } 2826e663fe38SJakub Kicinski 2827e663fe38SJakub Kicinski static int 2828e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2829e663fe38SJakub Kicinski unsigned int size) 2830e663fe38SJakub Kicinski { 2831e663fe38SJakub Kicinski swreg off_reg; 2832e663fe38SJakub Kicinski 2833e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2834e663fe38SJakub Kicinski 2835e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2836e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2837e663fe38SJakub Kicinski } 2838e663fe38SJakub Kicinski 2839e663fe38SJakub Kicinski static int 2840ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2841d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2842ee9133a8SJakub Kicinski { 2843d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2844b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2845b14157eeSJakub Kicinski false, wrp_lmem_store); 2846ee9133a8SJakub Kicinski } 2847ee9133a8SJakub Kicinski 2848d985888fSJakub Kicinski static int mem_stx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2849d985888fSJakub Kicinski { 2850d985888fSJakub Kicinski switch (meta->insn.off) { 2851d985888fSJakub Kicinski case offsetof(struct xdp_md, rx_queue_index): 2852d985888fSJakub Kicinski return nfp_queue_select(nfp_prog, meta); 2853d985888fSJakub Kicinski } 2854d985888fSJakub Kicinski 2855d985888fSJakub Kicinski WARN_ON_ONCE(1); /* verifier should have rejected bad accesses */ 2856d985888fSJakub Kicinski return -EOPNOTSUPP; 2857d985888fSJakub Kicinski } 2858d985888fSJakub Kicinski 2859ee9133a8SJakub Kicinski static int 2860e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2861e663fe38SJakub Kicinski unsigned int size) 2862e663fe38SJakub Kicinski { 2863e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2864e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2865e663fe38SJakub Kicinski 2866ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2867d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2868d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2869ee9133a8SJakub Kicinski 2870d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2871d9ae7f2bSJakub Kicinski } 2872d9ae7f2bSJakub Kicinski 2873e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2874e663fe38SJakub Kicinski { 2875e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2876e663fe38SJakub Kicinski } 2877e663fe38SJakub Kicinski 2878e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2879e663fe38SJakub Kicinski { 2880e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2881e663fe38SJakub Kicinski } 2882e663fe38SJakub Kicinski 2883d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2884d9ae7f2bSJakub Kicinski { 2885d985888fSJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) 2886d985888fSJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 2887d985888fSJakub Kicinski return mem_stx_xdp(nfp_prog, meta); 2888e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2889e663fe38SJakub Kicinski } 28902ca71441SJakub Kicinski 2891e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2892e663fe38SJakub Kicinski { 2893e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2894d9ae7f2bSJakub Kicinski } 2895d9ae7f2bSJakub Kicinski 2896dcb0c27fSJakub Kicinski static int 2897dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2898dcb0c27fSJakub Kicinski { 2899dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2900dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 290141aed09cSJakub Kicinski unsigned int full_add, out; 290241aed09cSJakub Kicinski swreg addra, addrb, off; 2903dcb0c27fSJakub Kicinski 2904dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2905dcb0c27fSJakub Kicinski 290641aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 290741aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 290841aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 290941aed09cSJakub Kicinski * code for both. 291041aed09cSJakub Kicinski */ 291141aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 291241aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 291341aed09cSJakub Kicinski 291441aed09cSJakub Kicinski if (meta->insn.off) { 291541aed09cSJakub Kicinski out += 2; 291641aed09cSJakub Kicinski full_add += 2; 291741aed09cSJakub Kicinski } 291841aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 291941aed09cSJakub Kicinski out += 3; 292041aed09cSJakub Kicinski full_add += 3; 292141aed09cSJakub Kicinski } 292241aed09cSJakub Kicinski if (meta->xadd_over_16bit) 292341aed09cSJakub Kicinski out += 2 + is64; 292441aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 292541aed09cSJakub Kicinski out += 5; 292641aed09cSJakub Kicinski full_add += 5; 292741aed09cSJakub Kicinski } 292841aed09cSJakub Kicinski 292941aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 293041aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 293141aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 293241aed09cSJakub Kicinski 293341aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 293441aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 293541aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 293641aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 293741aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 293841aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 293941aed09cSJakub Kicinski /* defer for add */ 294041aed09cSJakub Kicinski } 294141aed09cSJakub Kicinski 2942dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 2943dcb0c27fSJakub Kicinski if (!meta->insn.off) { 2944dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 2945dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 2946dcb0c27fSJakub Kicinski } else { 2947dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 2948dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 2949dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 2950dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 2951dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 2952dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 2953dcb0c27fSJakub Kicinski } 2954dcb0c27fSJakub Kicinski 295541aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 295641aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 295741aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 295841aed09cSJakub Kicinski 2959dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 2960dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 2961dcb0c27fSJakub Kicinski CMD_OVE_LEN | 2962dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 2963dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 2964dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 2965b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 2966dcb0c27fSJakub Kicinski 296741aed09cSJakub Kicinski if (meta->xadd_over_16bit) 296841aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 296941aed09cSJakub Kicinski } 297041aed09cSJakub Kicinski 297141aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 297241aed09cSJakub Kicinski return -EINVAL; 297341aed09cSJakub Kicinski 297441aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 297541aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 297641aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 297741aed09cSJakub Kicinski addra, addrb, is64 << 2, 297841aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 297941aed09cSJakub Kicinski 298041aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 298141aed09cSJakub Kicinski if (is64) 298241aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 298341aed09cSJakub Kicinski } 298441aed09cSJakub Kicinski 298541aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 298641aed09cSJakub Kicinski return -EINVAL; 298741aed09cSJakub Kicinski 2988dcb0c27fSJakub Kicinski return 0; 2989dcb0c27fSJakub Kicinski } 2990dcb0c27fSJakub Kicinski 2991dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2992dcb0c27fSJakub Kicinski { 2993dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 2994dcb0c27fSJakub Kicinski } 2995dcb0c27fSJakub Kicinski 2996dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2997dcb0c27fSJakub Kicinski { 2998dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 2999dcb0c27fSJakub Kicinski } 3000dcb0c27fSJakub Kicinski 3001d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3002d9ae7f2bSJakub Kicinski { 3003d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 3004d9ae7f2bSJakub Kicinski 3005d9ae7f2bSJakub Kicinski return 0; 3006d9ae7f2bSJakub Kicinski } 3007d9ae7f2bSJakub Kicinski 3008d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3009d9ae7f2bSJakub Kicinski { 3010d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3011d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 3012b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 3013b3f868dfSJakub Kicinski 3014b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 3015b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 3016d9ae7f2bSJakub Kicinski 3017d9ae7f2bSJakub Kicinski if (imm & ~0U) { 3018d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3019d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 3020d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 3021d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 3022d9ae7f2bSJakub Kicinski } 3023d9ae7f2bSJakub Kicinski 3024d9ae7f2bSJakub Kicinski if (imm >> 32) { 3025d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3026d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 3027d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 3028d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 3029d9ae7f2bSJakub Kicinski } 3030d9ae7f2bSJakub Kicinski 3031d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 3032d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 3033d9ae7f2bSJakub Kicinski 3034d9ae7f2bSJakub Kicinski return 0; 3035d9ae7f2bSJakub Kicinski } 3036d9ae7f2bSJakub Kicinski 3037d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3038d9ae7f2bSJakub Kicinski { 3039d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3040d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 3041b3f868dfSJakub Kicinski swreg tmp_reg; 3042d9ae7f2bSJakub Kicinski 3043d9ae7f2bSJakub Kicinski if (!imm) { 3044d9ae7f2bSJakub Kicinski meta->skip = true; 3045d9ae7f2bSJakub Kicinski return 0; 3046d9ae7f2bSJakub Kicinski } 3047d9ae7f2bSJakub Kicinski 3048d9ae7f2bSJakub Kicinski if (imm & ~0U) { 3049d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3050d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3051d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_AND, tmp_reg); 3052d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3053d9ae7f2bSJakub Kicinski } 3054d9ae7f2bSJakub Kicinski 3055d9ae7f2bSJakub Kicinski if (imm >> 32) { 3056d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3057d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3058d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_AND, tmp_reg); 3059d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3060d9ae7f2bSJakub Kicinski } 3061d9ae7f2bSJakub Kicinski 3062d9ae7f2bSJakub Kicinski return 0; 3063d9ae7f2bSJakub Kicinski } 3064d9ae7f2bSJakub Kicinski 3065d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3066d9ae7f2bSJakub Kicinski { 3067d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3068d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 3069b3f868dfSJakub Kicinski swreg tmp_reg; 3070d9ae7f2bSJakub Kicinski 3071d9ae7f2bSJakub Kicinski if (!imm) { 3072d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 3073d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 3074d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 307582837370SJakub Kicinski return 0; 3076d9ae7f2bSJakub Kicinski } 3077d9ae7f2bSJakub Kicinski 3078d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3079d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3080d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 3081d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3082d9ae7f2bSJakub Kicinski 3083d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3084d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3085d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 3086d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3087d9ae7f2bSJakub Kicinski 3088d9ae7f2bSJakub Kicinski return 0; 3089d9ae7f2bSJakub Kicinski } 3090d9ae7f2bSJakub Kicinski 3091d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3092d9ae7f2bSJakub Kicinski { 3093d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3094d9ae7f2bSJakub Kicinski 3095d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 3096d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 3097d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_a(insn->dst_reg * 2 + 1), 3098d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2 + 1)); 3099d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3100d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_OR, imm_b(nfp_prog)); 3101d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 3102d9ae7f2bSJakub Kicinski 3103d9ae7f2bSJakub Kicinski return 0; 3104d9ae7f2bSJakub Kicinski } 3105d9ae7f2bSJakub Kicinski 3106d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3107d9ae7f2bSJakub Kicinski { 3108d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 3109d9ae7f2bSJakub Kicinski } 3110d9ae7f2bSJakub Kicinski 3111d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3112d9ae7f2bSJakub Kicinski { 3113d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 3114d9ae7f2bSJakub Kicinski } 3115d9ae7f2bSJakub Kicinski 3116389f263bSQuentin Monnet static int 3117389f263bSQuentin Monnet bpf_to_bpf_call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3118389f263bSQuentin Monnet { 3119389f263bSQuentin Monnet u32 ret_tgt, stack_depth; 3120389f263bSQuentin Monnet swreg tmp_reg; 3121389f263bSQuentin Monnet 3122389f263bSQuentin Monnet stack_depth = round_up(nfp_prog->stack_frame_depth, STACK_FRAME_ALIGN); 3123389f263bSQuentin Monnet /* Space for saving the return address is accounted for by the callee, 3124389f263bSQuentin Monnet * so stack_depth can be zero for the main function. 3125389f263bSQuentin Monnet */ 3126389f263bSQuentin Monnet if (stack_depth) { 3127389f263bSQuentin Monnet tmp_reg = ur_load_imm_any(nfp_prog, stack_depth, 3128389f263bSQuentin Monnet stack_imm(nfp_prog)); 3129389f263bSQuentin Monnet emit_alu(nfp_prog, stack_reg(nfp_prog), 3130389f263bSQuentin Monnet stack_reg(nfp_prog), ALU_OP_ADD, tmp_reg); 3131389f263bSQuentin Monnet emit_csr_wr(nfp_prog, stack_reg(nfp_prog), 3132389f263bSQuentin Monnet NFP_CSR_ACT_LM_ADDR0); 3133389f263bSQuentin Monnet } 3134389f263bSQuentin Monnet 3135389f263bSQuentin Monnet /* The following steps are performed: 3136389f263bSQuentin Monnet * 1. Put the start offset of the callee into imm_b(). This will 3137389f263bSQuentin Monnet * require a fixup step, as we do not necessarily know this 3138389f263bSQuentin Monnet * address yet. 3139389f263bSQuentin Monnet * 2. Put the return address from the callee to the caller into 3140389f263bSQuentin Monnet * register ret_reg(). 3141389f263bSQuentin Monnet * 3. (After defer slots are consumed) Jump to the subroutine that 3142389f263bSQuentin Monnet * pushes the registers to the stack. 3143389f263bSQuentin Monnet * The subroutine acts as a trampoline, and returns to the address in 3144389f263bSQuentin Monnet * imm_b(), i.e. jumps to the callee. 3145389f263bSQuentin Monnet * 3146389f263bSQuentin Monnet * Using ret_reg() to pass the return address to the callee is set here 3147389f263bSQuentin Monnet * as a convention. The callee can then push this address onto its 3148389f263bSQuentin Monnet * stack frame in its prologue. The advantages of passing the return 3149389f263bSQuentin Monnet * address through ret_reg(), instead of pushing it to the stack right 3150389f263bSQuentin Monnet * here, are the following: 3151389f263bSQuentin Monnet * - It looks cleaner. 3152389f263bSQuentin Monnet * - If the called function is called multiple time, we get a lower 3153389f263bSQuentin Monnet * program size. 3154389f263bSQuentin Monnet * - We save two no-op instructions that should be added just before 3155389f263bSQuentin Monnet * the emit_br() when stack depth is not null otherwise. 3156389f263bSQuentin Monnet * - If we ever find a register to hold the return address during whole 3157389f263bSQuentin Monnet * execution of the callee, we will not have to push the return 3158389f263bSQuentin Monnet * address to the stack for leaf functions. 3159389f263bSQuentin Monnet */ 3160389f263bSQuentin Monnet ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 3161389f263bSQuentin Monnet emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, 3162389f263bSQuentin Monnet RELO_BR_GO_CALL_PUSH_REGS); 3163389f263bSQuentin Monnet wrp_immed_relo(nfp_prog, imm_b(nfp_prog), 0, RELO_IMMED_REL); 3164389f263bSQuentin Monnet wrp_immed_relo(nfp_prog, ret_reg(nfp_prog), ret_tgt, RELO_IMMED_REL); 3165389f263bSQuentin Monnet 3166389f263bSQuentin Monnet if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 3167389f263bSQuentin Monnet return -EINVAL; 3168389f263bSQuentin Monnet 3169389f263bSQuentin Monnet if (stack_depth) { 3170389f263bSQuentin Monnet tmp_reg = ur_load_imm_any(nfp_prog, stack_depth, 3171389f263bSQuentin Monnet stack_imm(nfp_prog)); 3172389f263bSQuentin Monnet emit_alu(nfp_prog, stack_reg(nfp_prog), 3173389f263bSQuentin Monnet stack_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 3174389f263bSQuentin Monnet emit_csr_wr(nfp_prog, stack_reg(nfp_prog), 3175389f263bSQuentin Monnet NFP_CSR_ACT_LM_ADDR0); 3176389f263bSQuentin Monnet wrp_nops(nfp_prog, 3); 3177389f263bSQuentin Monnet } 3178389f263bSQuentin Monnet 3179389f263bSQuentin Monnet return 0; 3180389f263bSQuentin Monnet } 3181389f263bSQuentin Monnet 3182389f263bSQuentin Monnet static int helper_call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 31832cb230bdSJakub Kicinski { 31842cb230bdSJakub Kicinski switch (meta->insn.imm) { 31850d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 31860d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 31870c261593SJakub Kicinski case BPF_FUNC_xdp_adjust_tail: 31880c261593SJakub Kicinski return adjust_tail(nfp_prog, meta); 318977a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 319044d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 3191bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3192fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 3193df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 3194df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 31959816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 31969816dd35SJakub Kicinski return nfp_perf_event_output(nfp_prog, meta); 31972cb230bdSJakub Kicinski default: 31982cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 31992cb230bdSJakub Kicinski return -EOPNOTSUPP; 32002cb230bdSJakub Kicinski } 32012cb230bdSJakub Kicinski } 32022cb230bdSJakub Kicinski 3203389f263bSQuentin Monnet static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3204389f263bSQuentin Monnet { 3205389f263bSQuentin Monnet if (is_mbpf_pseudo_call(meta)) 3206389f263bSQuentin Monnet return bpf_to_bpf_call(nfp_prog, meta); 3207389f263bSQuentin Monnet else 3208389f263bSQuentin Monnet return helper_call(nfp_prog, meta); 3209389f263bSQuentin Monnet } 3210389f263bSQuentin Monnet 3211389f263bSQuentin Monnet static bool nfp_is_main_function(struct nfp_insn_meta *meta) 3212389f263bSQuentin Monnet { 3213389f263bSQuentin Monnet return meta->subprog_idx == 0; 3214389f263bSQuentin Monnet } 3215389f263bSQuentin Monnet 3216d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3217d9ae7f2bSJakub Kicinski { 3218e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 3219d9ae7f2bSJakub Kicinski 3220d9ae7f2bSJakub Kicinski return 0; 3221d9ae7f2bSJakub Kicinski } 3222d9ae7f2bSJakub Kicinski 3223389f263bSQuentin Monnet static int 3224389f263bSQuentin Monnet nfp_subprog_epilogue(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3225389f263bSQuentin Monnet { 3226389f263bSQuentin Monnet /* Pop R6~R9 to the stack via related subroutine. 3227389f263bSQuentin Monnet * Pop return address for BPF-to-BPF call from the stack and load it 3228389f263bSQuentin Monnet * into ret_reg() before we jump. This means that the subroutine does 3229389f263bSQuentin Monnet * not come back here, we make it jump back to the subprogram caller 3230389f263bSQuentin Monnet * directly! 3231389f263bSQuentin Monnet */ 3232389f263bSQuentin Monnet emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 1, 3233389f263bSQuentin Monnet RELO_BR_GO_CALL_POP_REGS); 3234389f263bSQuentin Monnet wrp_mov(nfp_prog, ret_reg(nfp_prog), reg_lm(0, 0)); 3235389f263bSQuentin Monnet 3236389f263bSQuentin Monnet return 0; 3237389f263bSQuentin Monnet } 3238389f263bSQuentin Monnet 3239389f263bSQuentin Monnet static int jmp_exit(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3240389f263bSQuentin Monnet { 3241389f263bSQuentin Monnet if (nfp_is_main_function(meta)) 3242389f263bSQuentin Monnet return goto_out(nfp_prog, meta); 3243389f263bSQuentin Monnet else 3244389f263bSQuentin Monnet return nfp_subprog_epilogue(nfp_prog, meta); 3245389f263bSQuentin Monnet } 3246389f263bSQuentin Monnet 3247d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 3248d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 3249d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 3250d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 3251d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 3252d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 3253d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 3254d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 3255d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 3256d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 3257d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 3258d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 3259d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 3260d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_X] = mul_reg64, 3261d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_K] = mul_imm64, 32622a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_X] = div_reg64, 32632a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_K] = div_imm64, 3264254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 3265991f5b36SJiong Wang [BPF_ALU64 | BPF_LSH | BPF_X] = shl_reg64, 3266d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 3267991f5b36SJiong Wang [BPF_ALU64 | BPF_RSH | BPF_X] = shr_reg64, 3268d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 3269c217abccSJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_X] = ashr_reg64, 3270f43d0f17SJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_K] = ashr_imm64, 3271d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 3272d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 3273d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 3274d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 3275d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 3276d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 3277d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 3278d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 3279d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 3280d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 3281d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 3282d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 3283d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_X] = mul_reg, 3284d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_K] = mul_imm, 32852a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_X] = div_reg, 32862a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_K] = div_imm, 3287254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 3288d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 32893119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 3290d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 3291d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 3292d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 3293d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 3294d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 3295d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 3296d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 32972ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 32982ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 3299d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 33002ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 3301e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 3302e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 3303d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 3304e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 3305dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 3306dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 3307e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 3308e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 3309e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 3310e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 3311d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 3312d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 331361dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = cmp_imm, 331461dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = cmp_imm, 331561dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_K] = cmp_imm, 331661dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_K] = cmp_imm, 331761dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_K] = cmp_imm, 331861dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_K] = cmp_imm, 331961dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_K] = cmp_imm, 332061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_K] = cmp_imm, 3321d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 3322d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 3323d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 332461dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = cmp_reg, 332561dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = cmp_reg, 332661dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_X] = cmp_reg, 332761dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_X] = cmp_reg, 332861dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_X] = cmp_reg, 332961dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_X] = cmp_reg, 333061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_X] = cmp_reg, 333161dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_X] = cmp_reg, 3332d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 3333d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 33342cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 3335389f263bSQuentin Monnet [BPF_JMP | BPF_EXIT] = jmp_exit, 3336d9ae7f2bSJakub Kicinski }; 3337d9ae7f2bSJakub Kicinski 3338d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 3339d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 3340d9ae7f2bSJakub Kicinski { 33415b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 3342854dc87dSJiong Wang u32 idx, br_idx; 3343d9ae7f2bSJakub Kicinski 3344854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 3345d9ae7f2bSJakub Kicinski if (meta->skip) 3346d9ae7f2bSJakub Kicinski continue; 33472cb230bdSJakub Kicinski if (meta->insn.code == (BPF_JMP | BPF_CALL)) 33482cb230bdSJakub Kicinski continue; 3349d9ae7f2bSJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 3350d9ae7f2bSJakub Kicinski continue; 3351d9ae7f2bSJakub Kicinski 33525b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 33532314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 33545b674140SJiong Wang else 33552314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 3356854dc87dSJiong Wang 3357d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 3358d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 3359d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 3360d9ae7f2bSJakub Kicinski return -ELOOP; 3361d9ae7f2bSJakub Kicinski } 3362d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 33632314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 33642314fe9eSJakub Kicinski RELO_BR_REL) 3365d9ae7f2bSJakub Kicinski continue; 3366d9ae7f2bSJakub Kicinski 33675b674140SJiong Wang if (!meta->jmp_dst) { 33685b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 3369d9ae7f2bSJakub Kicinski return -ELOOP; 3370d9ae7f2bSJakub Kicinski } 3371d9ae7f2bSJakub Kicinski 33725b674140SJiong Wang jmp_dst = meta->jmp_dst; 3373854dc87dSJiong Wang 33745b674140SJiong Wang if (jmp_dst->skip) { 3375d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 3376d9ae7f2bSJakub Kicinski return -ELOOP; 3377d9ae7f2bSJakub Kicinski } 3378d9ae7f2bSJakub Kicinski 33792314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 3380d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 3381d9ae7f2bSJakub Kicinski continue; 33825b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 3383d9ae7f2bSJakub Kicinski } 3384d9ae7f2bSJakub Kicinski } 3385d9ae7f2bSJakub Kicinski 3386d9ae7f2bSJakub Kicinski return 0; 3387d9ae7f2bSJakub Kicinski } 3388d9ae7f2bSJakub Kicinski 3389d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 3390d9ae7f2bSJakub Kicinski { 339118e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 339218e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 339318e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 3394d9ae7f2bSJakub Kicinski } 3395d9ae7f2bSJakub Kicinski 3396389f263bSQuentin Monnet static void 3397389f263bSQuentin Monnet nfp_subprog_prologue(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3398389f263bSQuentin Monnet { 3399389f263bSQuentin Monnet /* Save return address into the stack. */ 3400389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_lm(0, 0), ret_reg(nfp_prog)); 3401389f263bSQuentin Monnet } 3402389f263bSQuentin Monnet 3403389f263bSQuentin Monnet static void 3404389f263bSQuentin Monnet nfp_start_subprog(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3405389f263bSQuentin Monnet { 3406389f263bSQuentin Monnet unsigned int depth = nfp_prog->subprog[meta->subprog_idx].stack_depth; 3407389f263bSQuentin Monnet 3408389f263bSQuentin Monnet nfp_prog->stack_frame_depth = round_up(depth, 4); 3409389f263bSQuentin Monnet nfp_subprog_prologue(nfp_prog, meta); 3410389f263bSQuentin Monnet } 3411389f263bSQuentin Monnet 3412389f263bSQuentin Monnet bool nfp_is_subprog_start(struct nfp_insn_meta *meta) 3413389f263bSQuentin Monnet { 3414389f263bSQuentin Monnet return meta->flags & FLAG_INSN_IS_SUBPROG_START; 3415389f263bSQuentin Monnet } 3416389f263bSQuentin Monnet 3417d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 3418d9ae7f2bSJakub Kicinski { 3419d9ae7f2bSJakub Kicinski /* TC direct-action mode: 3420d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 3421d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 3422d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 3423d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 3424d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 3425d9ae7f2bSJakub Kicinski * 3426d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 3427d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 3428d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 3429d9ae7f2bSJakub Kicinski * packets up the stack. 3430d9ae7f2bSJakub Kicinski */ 3431d9ae7f2bSJakub Kicinski /* Target for aborts */ 3432d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3433d9ae7f2bSJakub Kicinski 3434e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3435d9ae7f2bSJakub Kicinski 3436c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3437d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 3438d9ae7f2bSJakub Kicinski 3439d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3440d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3441d9ae7f2bSJakub Kicinski 3442d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 3443d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 3444d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3445c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3446d9ae7f2bSJakub Kicinski 3447d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 3448d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 3449d9ae7f2bSJakub Kicinski 3450d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3451d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 3452d9ae7f2bSJakub Kicinski 3453d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3454d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 3455d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3456d9ae7f2bSJakub Kicinski 3457d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3458d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3459d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 3460d9ae7f2bSJakub Kicinski 3461e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3462d9ae7f2bSJakub Kicinski 3463d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3464d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 3465d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3466d9ae7f2bSJakub Kicinski } 3467d9ae7f2bSJakub Kicinski 3468d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 3469d9ae7f2bSJakub Kicinski { 3470d9ae7f2bSJakub Kicinski /* XDP return codes: 3471d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 3472d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 3473d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 3474d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 3475d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 3476d9ae7f2bSJakub Kicinski */ 3477d9ae7f2bSJakub Kicinski /* Target for aborts */ 3478d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3479d9ae7f2bSJakub Kicinski 3480e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3481d9ae7f2bSJakub Kicinski 3482c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3483d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 3484d9ae7f2bSJakub Kicinski 3485d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3486d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3487d9ae7f2bSJakub Kicinski 3488d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 3489d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 3490d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3491d9ae7f2bSJakub Kicinski 3492d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 3493d9ae7f2bSJakub Kicinski 3494d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3495d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 3496d9ae7f2bSJakub Kicinski 3497d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3498d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3499d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3500d9ae7f2bSJakub Kicinski 3501e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3502d9ae7f2bSJakub Kicinski 3503c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3504d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3505d9ae7f2bSJakub Kicinski } 3506d9ae7f2bSJakub Kicinski 3507389f263bSQuentin Monnet static void nfp_push_callee_registers(struct nfp_prog *nfp_prog) 3508389f263bSQuentin Monnet { 3509389f263bSQuentin Monnet u8 reg; 3510389f263bSQuentin Monnet 3511389f263bSQuentin Monnet /* Subroutine: Save all callee saved registers (R6 ~ R9). 3512389f263bSQuentin Monnet * imm_b() holds the return address. 3513389f263bSQuentin Monnet */ 3514389f263bSQuentin Monnet nfp_prog->tgt_call_push_regs = nfp_prog_current_offset(nfp_prog); 3515389f263bSQuentin Monnet for (reg = BPF_REG_6; reg <= BPF_REG_9; reg++) { 3516389f263bSQuentin Monnet u8 adj = (reg - BPF_REG_0) * 2; 3517389f263bSQuentin Monnet u8 idx = (reg - BPF_REG_6) * 2; 3518389f263bSQuentin Monnet 3519389f263bSQuentin Monnet /* The first slot in the stack frame is used to push the return 3520389f263bSQuentin Monnet * address in bpf_to_bpf_call(), start just after. 3521389f263bSQuentin Monnet */ 3522389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_lm(0, 1 + idx), reg_b(adj)); 3523389f263bSQuentin Monnet 3524389f263bSQuentin Monnet if (reg == BPF_REG_8) 3525389f263bSQuentin Monnet /* Prepare to jump back, last 3 insns use defer slots */ 3526389f263bSQuentin Monnet emit_rtn(nfp_prog, imm_b(nfp_prog), 3); 3527389f263bSQuentin Monnet 3528389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_lm(0, 1 + idx + 1), reg_b(adj + 1)); 3529389f263bSQuentin Monnet } 3530389f263bSQuentin Monnet } 3531389f263bSQuentin Monnet 3532389f263bSQuentin Monnet static void nfp_pop_callee_registers(struct nfp_prog *nfp_prog) 3533389f263bSQuentin Monnet { 3534389f263bSQuentin Monnet u8 reg; 3535389f263bSQuentin Monnet 3536389f263bSQuentin Monnet /* Subroutine: Restore all callee saved registers (R6 ~ R9). 3537389f263bSQuentin Monnet * ret_reg() holds the return address. 3538389f263bSQuentin Monnet */ 3539389f263bSQuentin Monnet nfp_prog->tgt_call_pop_regs = nfp_prog_current_offset(nfp_prog); 3540389f263bSQuentin Monnet for (reg = BPF_REG_6; reg <= BPF_REG_9; reg++) { 3541389f263bSQuentin Monnet u8 adj = (reg - BPF_REG_0) * 2; 3542389f263bSQuentin Monnet u8 idx = (reg - BPF_REG_6) * 2; 3543389f263bSQuentin Monnet 3544389f263bSQuentin Monnet /* The first slot in the stack frame holds the return address, 3545389f263bSQuentin Monnet * start popping just after that. 3546389f263bSQuentin Monnet */ 3547389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_both(adj), reg_lm(0, 1 + idx)); 3548389f263bSQuentin Monnet 3549389f263bSQuentin Monnet if (reg == BPF_REG_8) 3550389f263bSQuentin Monnet /* Prepare to jump back, last 3 insns use defer slots */ 3551389f263bSQuentin Monnet emit_rtn(nfp_prog, ret_reg(nfp_prog), 3); 3552389f263bSQuentin Monnet 3553389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_both(adj + 1), reg_lm(0, 1 + idx + 1)); 3554389f263bSQuentin Monnet } 3555389f263bSQuentin Monnet } 3556389f263bSQuentin Monnet 3557d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 3558d9ae7f2bSJakub Kicinski { 3559012bb8a8SJakub Kicinski switch (nfp_prog->type) { 3560012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 3561d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 3562d9ae7f2bSJakub Kicinski break; 3563012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 3564d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 3565d9ae7f2bSJakub Kicinski break; 3566012bb8a8SJakub Kicinski default: 3567012bb8a8SJakub Kicinski WARN_ON(1); 3568d9ae7f2bSJakub Kicinski } 3569389f263bSQuentin Monnet 3570389f263bSQuentin Monnet if (nfp_prog->subprog_cnt == 1) 3571389f263bSQuentin Monnet return; 3572389f263bSQuentin Monnet 3573389f263bSQuentin Monnet nfp_push_callee_registers(nfp_prog); 3574389f263bSQuentin Monnet nfp_pop_callee_registers(nfp_prog); 3575d9ae7f2bSJakub Kicinski } 3576d9ae7f2bSJakub Kicinski 3577d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 3578d9ae7f2bSJakub Kicinski { 3579d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3580389f263bSQuentin Monnet unsigned int depth; 3581ff42bb9fSJakub Kicinski int err; 3582d9ae7f2bSJakub Kicinski 3583389f263bSQuentin Monnet depth = nfp_prog->subprog[0].stack_depth; 3584389f263bSQuentin Monnet nfp_prog->stack_frame_depth = round_up(depth, 4); 3585389f263bSQuentin Monnet 3586d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 3587d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3588d9ae7f2bSJakub Kicinski return nfp_prog->error; 3589d9ae7f2bSJakub Kicinski 3590d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3591d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 3592d9ae7f2bSJakub Kicinski 3593d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 3594d9ae7f2bSJakub Kicinski 3595389f263bSQuentin Monnet if (nfp_is_subprog_start(meta)) { 3596389f263bSQuentin Monnet nfp_start_subprog(nfp_prog, meta); 3597389f263bSQuentin Monnet if (nfp_prog->error) 3598389f263bSQuentin Monnet return nfp_prog->error; 3599389f263bSQuentin Monnet } 3600389f263bSQuentin Monnet 3601d9ae7f2bSJakub Kicinski if (meta->skip) { 3602d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3603d9ae7f2bSJakub Kicinski continue; 3604d9ae7f2bSJakub Kicinski } 3605d9ae7f2bSJakub Kicinski 3606d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 3607d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 3608d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 3609d9ae7f2bSJakub Kicinski if (!cb) 3610d9ae7f2bSJakub Kicinski return -ENOENT; 3611d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 3612d9ae7f2bSJakub Kicinski if (err) 3613d9ae7f2bSJakub Kicinski return err; 3614e8a4796eSJakub Kicinski if (nfp_prog->error) 3615e8a4796eSJakub Kicinski return nfp_prog->error; 3616d9ae7f2bSJakub Kicinski 3617d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3618d9ae7f2bSJakub Kicinski } 3619d9ae7f2bSJakub Kicinski 3620854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 3621854dc87dSJiong Wang 3622d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 3623d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3624d9ae7f2bSJakub Kicinski return nfp_prog->error; 3625d9ae7f2bSJakub Kicinski 3626ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 36271c03e03fSJakub Kicinski if (nfp_prog->error) 36281c03e03fSJakub Kicinski return nfp_prog->error; 36291c03e03fSJakub Kicinski 3630d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 3631d9ae7f2bSJakub Kicinski } 3632d9ae7f2bSJakub Kicinski 3633d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 3634d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 3635d9ae7f2bSJakub Kicinski { 3636d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3637d9ae7f2bSJakub Kicinski 3638d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3639d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 3640d9ae7f2bSJakub Kicinski 3641d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 3642d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 3643d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 3644d9ae7f2bSJakub Kicinski continue; 3645d9ae7f2bSJakub Kicinski 3646d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 3647d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 3648d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 3649d9ae7f2bSJakub Kicinski meta->skip = true; 3650d9ae7f2bSJakub Kicinski 3651d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 3652d9ae7f2bSJakub Kicinski if (!meta->skip) 3653d9ae7f2bSJakub Kicinski return; 3654d9ae7f2bSJakub Kicinski } 3655d9ae7f2bSJakub Kicinski } 3656d9ae7f2bSJakub Kicinski 36576c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 36586c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 36596c59500cSJakub Kicinski */ 36606c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 36616c59500cSJakub Kicinski { 36626c59500cSJakub Kicinski struct nfp_insn_meta *meta; 36636c59500cSJakub Kicinski 36646c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 36656c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 36666c59500cSJakub Kicinski 36676c59500cSJakub Kicinski if (meta->skip) 36686c59500cSJakub Kicinski continue; 36696c59500cSJakub Kicinski 36706c59500cSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_ALU && 36717bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_ALU64 && 36727bdc97beSJakub Kicinski BPF_CLASS(insn.code) != BPF_JMP) 36736c59500cSJakub Kicinski continue; 36746c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 36756c59500cSJakub Kicinski continue; 36766c59500cSJakub Kicinski if (insn.imm >= 0) 36776c59500cSJakub Kicinski continue; 36786c59500cSJakub Kicinski 36797bdc97beSJakub Kicinski if (BPF_CLASS(insn.code) == BPF_JMP) { 36807bdc97beSJakub Kicinski switch (BPF_OP(insn.code)) { 36817bdc97beSJakub Kicinski case BPF_JGE: 36827bdc97beSJakub Kicinski case BPF_JSGE: 36837bdc97beSJakub Kicinski case BPF_JLT: 36847bdc97beSJakub Kicinski case BPF_JSLT: 36857bdc97beSJakub Kicinski meta->jump_neg_op = true; 36867bdc97beSJakub Kicinski break; 36877bdc97beSJakub Kicinski default: 36887bdc97beSJakub Kicinski continue; 36897bdc97beSJakub Kicinski } 36907bdc97beSJakub Kicinski } else { 36916c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 36926c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 36936c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 36946c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 36956c59500cSJakub Kicinski else 36966c59500cSJakub Kicinski continue; 36976c59500cSJakub Kicinski 36986c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 36997bdc97beSJakub Kicinski } 37006c59500cSJakub Kicinski 37016c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 37026c59500cSJakub Kicinski } 37036c59500cSJakub Kicinski } 37046c59500cSJakub Kicinski 3705d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 3706d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 3707d9ae7f2bSJakub Kicinski { 3708d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3709d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 3710d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 3711d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 3712d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 3713d9ae7f2bSJakub Kicinski }; 3714d9ae7f2bSJakub Kicinski 3715d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3716d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 3717d9ae7f2bSJakub Kicinski 3718d9ae7f2bSJakub Kicinski insn = meta1->insn; 3719d9ae7f2bSJakub Kicinski next = meta2->insn; 3720d9ae7f2bSJakub Kicinski 3721d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3722d9ae7f2bSJakub Kicinski continue; 3723d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3724d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3725d9ae7f2bSJakub Kicinski continue; 3726d9ae7f2bSJakub Kicinski 3727d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 3728d9ae7f2bSJakub Kicinski continue; 3729d9ae7f2bSJakub Kicinski 3730d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 3731d9ae7f2bSJakub Kicinski continue; 3732d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 3733d9ae7f2bSJakub Kicinski continue; 3734d9ae7f2bSJakub Kicinski 3735d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 3736d9ae7f2bSJakub Kicinski continue; 3737d9ae7f2bSJakub Kicinski 37381266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 37391266f5d6SJiong Wang continue; 37401266f5d6SJiong Wang 3741d9ae7f2bSJakub Kicinski meta2->skip = true; 3742d9ae7f2bSJakub Kicinski } 3743d9ae7f2bSJakub Kicinski } 3744d9ae7f2bSJakub Kicinski 3745d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 3746d9ae7f2bSJakub Kicinski { 3747d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 3748d9ae7f2bSJakub Kicinski 3749d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 3750d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 3751d9ae7f2bSJakub Kicinski 3752d9ae7f2bSJakub Kicinski insn = meta1->insn; 3753d9ae7f2bSJakub Kicinski next1 = meta2->insn; 3754d9ae7f2bSJakub Kicinski next2 = meta3->insn; 3755d9ae7f2bSJakub Kicinski 3756d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3757d9ae7f2bSJakub Kicinski continue; 3758d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3759d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3760d9ae7f2bSJakub Kicinski continue; 3761d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 3762d9ae7f2bSJakub Kicinski continue; 3763d9ae7f2bSJakub Kicinski 3764d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 3765d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 3766d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 3767d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 3768d9ae7f2bSJakub Kicinski continue; 3769d9ae7f2bSJakub Kicinski 3770d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 3771d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 3772d9ae7f2bSJakub Kicinski continue; 3773d9ae7f2bSJakub Kicinski 3774d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 3775d9ae7f2bSJakub Kicinski continue; 3776d9ae7f2bSJakub Kicinski 377729fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 377829fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 377929fe46efSJiong Wang continue; 378029fe46efSJiong Wang 3781d9ae7f2bSJakub Kicinski meta2->skip = true; 3782d9ae7f2bSJakub Kicinski meta3->skip = true; 3783d9ae7f2bSJakub Kicinski } 3784d9ae7f2bSJakub Kicinski } 3785d9ae7f2bSJakub Kicinski 37866bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 37876bc7103cSJiong Wang * 37886bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 37896bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 37906bc7103cSJiong Wang * 37916bc7103cSJiong Wang * The destination register of load and source register of store should 37926bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 37936bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 37946bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 37956bc7103cSJiong Wang */ 37966bc7103cSJiong Wang static bool 37976bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 37986bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 37996bc7103cSJiong Wang { 38006bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 38016bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 38026bc7103cSJiong Wang 38036bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 38046bc7103cSJiong Wang return false; 38056bc7103cSJiong Wang 3806cc0dff6dSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET && 3807cc0dff6dSJiong Wang ld_meta->ptr.type != PTR_TO_MAP_VALUE) 38086bc7103cSJiong Wang return false; 38096bc7103cSJiong Wang 38106bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 38116bc7103cSJiong Wang return false; 38126bc7103cSJiong Wang 38136bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 38146bc7103cSJiong Wang return false; 38156bc7103cSJiong Wang 38166bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 38176bc7103cSJiong Wang return false; 38186bc7103cSJiong Wang 38196bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 38206bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 38216bc7103cSJiong Wang return false; 38226bc7103cSJiong Wang 38236bc7103cSJiong Wang return true; 38246bc7103cSJiong Wang } 38256bc7103cSJiong Wang 38266bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 38276bc7103cSJiong Wang * 38286bc7103cSJiong Wang * - Their address base registers are the same. 38296bc7103cSJiong Wang * - Their address offsets are in the same order. 38306bc7103cSJiong Wang * - They operate at the same memory width. 38316bc7103cSJiong Wang * - There is no jump into the middle of them. 38326bc7103cSJiong Wang */ 38336bc7103cSJiong Wang static bool 38346bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 38356bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 38366bc7103cSJiong Wang struct bpf_insn *prev_ld, 38376bc7103cSJiong Wang struct bpf_insn *prev_st) 38386bc7103cSJiong Wang { 38396bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 38406bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 38416bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 38426bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 38436bc7103cSJiong Wang 38446bc7103cSJiong Wang /* This pair is the start pair. */ 38456bc7103cSJiong Wang if (!prev_ld) 38466bc7103cSJiong Wang return true; 38476bc7103cSJiong Wang 38486bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 38496bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 38506bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 38516bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 38526bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 38536bc7103cSJiong Wang prev_ld_off = prev_ld->off; 38546bc7103cSJiong Wang prev_st_off = prev_st->off; 38556bc7103cSJiong Wang 38566bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 38576bc7103cSJiong Wang return false; 38586bc7103cSJiong Wang 38596bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 38606bc7103cSJiong Wang return false; 38616bc7103cSJiong Wang 38626bc7103cSJiong Wang if (curr_size != prev_size) 38636bc7103cSJiong Wang return false; 38646bc7103cSJiong Wang 38656bc7103cSJiong Wang /* There is jump to the head of this pair. */ 38666bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 38676bc7103cSJiong Wang return false; 38686bc7103cSJiong Wang 38696bc7103cSJiong Wang /* Both in ascending order. */ 38706bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 38716bc7103cSJiong Wang prev_st_off + prev_size == st->off) 38726bc7103cSJiong Wang return true; 38736bc7103cSJiong Wang 38746bc7103cSJiong Wang /* Both in descending order. */ 38756bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 38766bc7103cSJiong Wang st->off + curr_size == prev_st_off) 38776bc7103cSJiong Wang return true; 38786bc7103cSJiong Wang 38796bc7103cSJiong Wang return false; 38806bc7103cSJiong Wang } 38816bc7103cSJiong Wang 38826bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 38836bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 38846bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 38856bc7103cSJiong Wang * as an memory copy. 38866bc7103cSJiong Wang */ 38876bc7103cSJiong Wang static bool 38886bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 38896bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 38906bc7103cSJiong Wang { 38916bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 38926bc7103cSJiong Wang 38936bc7103cSJiong Wang /* Different pointer types does not overlap. */ 38946bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 38956bc7103cSJiong Wang return false; 38966bc7103cSJiong Wang 38976bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 38986bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 38996bc7103cSJiong Wang return true; 39006bc7103cSJiong Wang 39016bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 39026bc7103cSJiong Wang * base register. 39036bc7103cSJiong Wang */ 39046bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 39056bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 39066bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 39076bc7103cSJiong Wang 39086bc7103cSJiong Wang /* Ascending order cross. */ 39096bc7103cSJiong Wang if (ld_off > head_ld_off && 39106bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 39116bc7103cSJiong Wang return true; 39126bc7103cSJiong Wang 39136bc7103cSJiong Wang /* Descending order cross. */ 39146bc7103cSJiong Wang if (ld_off < head_ld_off && 39156bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 39166bc7103cSJiong Wang return true; 39176bc7103cSJiong Wang 39186bc7103cSJiong Wang return false; 39196bc7103cSJiong Wang } 39206bc7103cSJiong Wang 39216bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 39226bc7103cSJiong Wang * 39236bc7103cSJiong Wang * load R, [regA + offA] 39246bc7103cSJiong Wang * store [regB + offB], R 39256bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 39266bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 39276bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 39286bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 39296bc7103cSJiong Wang * ... 39306bc7103cSJiong Wang * 39316bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 39326bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 39336bc7103cSJiong Wang */ 39346bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 39356bc7103cSJiong Wang { 39366bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 39376bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 39386bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 39396bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 39406bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 39416bc7103cSJiong Wang u8 count = 0; 39426bc7103cSJiong Wang 39436bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 39446bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 39456bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 39466bc7103cSJiong Wang 39476bc7103cSJiong Wang /* Reset record status if any of the following if true: 39486bc7103cSJiong Wang * - The current insn pair is not load/store. 39496bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 39506bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 39516bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 39526bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 39536bc7103cSJiong Wang * single NFP CPP command can transfer. 39546bc7103cSJiong Wang */ 39556bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 39566bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 39576bc7103cSJiong Wang prev_st) || 39586bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 39596bc7103cSJiong Wang head_st_meta) || 39606bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 39616bc7103cSJiong Wang if (!count) 39626bc7103cSJiong Wang continue; 39636bc7103cSJiong Wang 39646bc7103cSJiong Wang if (count > 1) { 39656bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 39666bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 39676bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 39686bc7103cSJiong Wang 39696bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 39706bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 39716bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 39726bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 39736bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 39746bc7103cSJiong Wang } 39756bc7103cSJiong Wang 39766bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 39776bc7103cSJiong Wang head_st_meta->skip = true; 39786bc7103cSJiong Wang } else { 39796bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 39806bc7103cSJiong Wang } 39816bc7103cSJiong Wang 39826bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 39836bc7103cSJiong Wang * could serve as the new head of the the next chain. 39846bc7103cSJiong Wang */ 39856bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 39866bc7103cSJiong Wang head_ld_meta = meta1; 39876bc7103cSJiong Wang head_st_meta = meta2; 39886bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 39896bc7103cSJiong Wang BPF_LDST_BYTES(ld); 39906bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 39916bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 39926bc7103cSJiong Wang prev_ld = ld; 39936bc7103cSJiong Wang prev_st = st; 39946bc7103cSJiong Wang count = 1; 39956bc7103cSJiong Wang } else { 39966bc7103cSJiong Wang head_ld_meta = NULL; 39976bc7103cSJiong Wang head_st_meta = NULL; 39986bc7103cSJiong Wang prev_ld = NULL; 39996bc7103cSJiong Wang prev_st = NULL; 40006bc7103cSJiong Wang count = 0; 40016bc7103cSJiong Wang } 40026bc7103cSJiong Wang 40036bc7103cSJiong Wang continue; 40046bc7103cSJiong Wang } 40056bc7103cSJiong Wang 40066bc7103cSJiong Wang if (!head_ld_meta) { 40076bc7103cSJiong Wang head_ld_meta = meta1; 40086bc7103cSJiong Wang head_st_meta = meta2; 40096bc7103cSJiong Wang } else { 40106bc7103cSJiong Wang meta1->skip = true; 40116bc7103cSJiong Wang meta2->skip = true; 40126bc7103cSJiong Wang } 40136bc7103cSJiong Wang 40146bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 40156bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 40166bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 40176bc7103cSJiong Wang prev_ld = ld; 40186bc7103cSJiong Wang prev_st = st; 40196bc7103cSJiong Wang count++; 40206bc7103cSJiong Wang } 40216bc7103cSJiong Wang } 40226bc7103cSJiong Wang 402387b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 402487b10ecdSJiong Wang { 402587b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 402687b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 402787b10ecdSJiong Wang bool cache_avail = false; 402887b10ecdSJiong Wang struct bpf_insn *insn; 402987b10ecdSJiong Wang s32 range_ptr_off = 0; 403087b10ecdSJiong Wang u32 range_ptr_id = 0; 403187b10ecdSJiong Wang 403287b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 403387b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 403487b10ecdSJiong Wang cache_avail = false; 403587b10ecdSJiong Wang 403687b10ecdSJiong Wang if (meta->skip) 403787b10ecdSJiong Wang continue; 403887b10ecdSJiong Wang 403987b10ecdSJiong Wang insn = &meta->insn; 404087b10ecdSJiong Wang 404187b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 404287b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 404387b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 404487b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 404587b10ecdSJiong Wang cache_avail = false; 404687b10ecdSJiong Wang continue; 404787b10ecdSJiong Wang } 404887b10ecdSJiong Wang 404987b10ecdSJiong Wang if (!is_mbpf_load(meta)) 405087b10ecdSJiong Wang continue; 405187b10ecdSJiong Wang 405287b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 405387b10ecdSJiong Wang cache_avail = false; 405487b10ecdSJiong Wang continue; 405587b10ecdSJiong Wang } 405687b10ecdSJiong Wang 405787b10ecdSJiong Wang if (!cache_avail) { 405887b10ecdSJiong Wang cache_avail = true; 405987b10ecdSJiong Wang if (range_node) 406087b10ecdSJiong Wang goto end_current_then_start_new; 406187b10ecdSJiong Wang goto start_new; 406287b10ecdSJiong Wang } 406387b10ecdSJiong Wang 406487b10ecdSJiong Wang /* Check ID to make sure two reads share the same 406587b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 406687b10ecdSJiong Wang * to make sure they also share the same constant 406787b10ecdSJiong Wang * offset. 406887b10ecdSJiong Wang * 406987b10ecdSJiong Wang * OFFs don't really need to be the same, because they 407087b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 407187b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 407287b10ecdSJiong Wang * offsets against original packet pointer. We don't 407387b10ecdSJiong Wang * support this. 407487b10ecdSJiong Wang */ 407587b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 407687b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 407787b10ecdSJiong Wang s16 new_start = range_start; 407887b10ecdSJiong Wang s16 end, off = insn->off; 407987b10ecdSJiong Wang s16 new_end = range_end; 408087b10ecdSJiong Wang bool changed = false; 408187b10ecdSJiong Wang 408287b10ecdSJiong Wang if (off < range_start) { 408387b10ecdSJiong Wang new_start = off; 408487b10ecdSJiong Wang changed = true; 408587b10ecdSJiong Wang } 408687b10ecdSJiong Wang 408787b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 408887b10ecdSJiong Wang if (end > range_end) { 408987b10ecdSJiong Wang new_end = end; 409087b10ecdSJiong Wang changed = true; 409187b10ecdSJiong Wang } 409287b10ecdSJiong Wang 409387b10ecdSJiong Wang if (!changed) 409487b10ecdSJiong Wang continue; 409587b10ecdSJiong Wang 409687b10ecdSJiong Wang if (new_end - new_start <= 64) { 409787b10ecdSJiong Wang /* Install new range. */ 409887b10ecdSJiong Wang range_start = new_start; 409987b10ecdSJiong Wang range_end = new_end; 410087b10ecdSJiong Wang continue; 410187b10ecdSJiong Wang } 410287b10ecdSJiong Wang } 410387b10ecdSJiong Wang 410487b10ecdSJiong Wang end_current_then_start_new: 410587b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 410687b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 410787b10ecdSJiong Wang start_new: 410887b10ecdSJiong Wang range_node = meta; 410987b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 411087b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 411187b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 411287b10ecdSJiong Wang range_start = insn->off; 411387b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 411487b10ecdSJiong Wang } 411587b10ecdSJiong Wang 411687b10ecdSJiong Wang if (range_node) { 411787b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 411887b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 411987b10ecdSJiong Wang } 412087b10ecdSJiong Wang 412187b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 412287b10ecdSJiong Wang if (meta->skip) 412387b10ecdSJiong Wang continue; 412487b10ecdSJiong Wang 412587b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 412687b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 412787b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 412887b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 412987b10ecdSJiong Wang } else { 413087b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 413187b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 413287b10ecdSJiong Wang } 413387b10ecdSJiong Wang } 413487b10ecdSJiong Wang } 413587b10ecdSJiong Wang } 413687b10ecdSJiong Wang 4137d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 4138d9ae7f2bSJakub Kicinski { 4139d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 4140d9ae7f2bSJakub Kicinski 41416c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 4142d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 4143d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 41446bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 414587b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 4146d9ae7f2bSJakub Kicinski 4147d9ae7f2bSJakub Kicinski return 0; 4148d9ae7f2bSJakub Kicinski } 4149d9ae7f2bSJakub Kicinski 4150b4264c96SJakub Kicinski static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) 4151b4264c96SJakub Kicinski { 4152b4264c96SJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 4153b4264c96SJakub Kicinski struct nfp_bpf_map *nfp_map; 4154b4264c96SJakub Kicinski struct bpf_map *map; 4155ab01f4acSJakub Kicinski u32 id; 4156b4264c96SJakub Kicinski 4157b4264c96SJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 4158b4264c96SJakub Kicinski if (meta1->skip || meta2->skip) 4159b4264c96SJakub Kicinski continue; 4160b4264c96SJakub Kicinski 4161b4264c96SJakub Kicinski if (meta1->insn.code != (BPF_LD | BPF_IMM | BPF_DW) || 4162b4264c96SJakub Kicinski meta1->insn.src_reg != BPF_PSEUDO_MAP_FD) 4163b4264c96SJakub Kicinski continue; 4164b4264c96SJakub Kicinski 4165b4264c96SJakub Kicinski map = (void *)(unsigned long)((u32)meta1->insn.imm | 4166b4264c96SJakub Kicinski (u64)meta2->insn.imm << 32); 4167ab01f4acSJakub Kicinski if (bpf_map_offload_neutral(map)) { 4168ab01f4acSJakub Kicinski id = map->id; 4169ab01f4acSJakub Kicinski } else { 4170b4264c96SJakub Kicinski nfp_map = map_to_offmap(map)->dev_priv; 4171ab01f4acSJakub Kicinski id = nfp_map->tid; 4172ab01f4acSJakub Kicinski } 4173b4264c96SJakub Kicinski 4174ab01f4acSJakub Kicinski meta1->insn.imm = id; 4175b4264c96SJakub Kicinski meta2->insn.imm = 0; 4176b4264c96SJakub Kicinski } 4177b4264c96SJakub Kicinski 4178b4264c96SJakub Kicinski return 0; 4179b4264c96SJakub Kicinski } 4180b4264c96SJakub Kicinski 41812314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 4182fd068ddcSJakub Kicinski { 41832314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 4184fd068ddcSJakub Kicinski int i; 4185fd068ddcSJakub Kicinski 41862314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 4187fd068ddcSJakub Kicinski int err; 4188fd068ddcSJakub Kicinski 41892314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 4190fd068ddcSJakub Kicinski if (err) 4191fd068ddcSJakub Kicinski return err; 4192fd068ddcSJakub Kicinski 41932314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 4194fd068ddcSJakub Kicinski } 4195fd068ddcSJakub Kicinski 4196fd068ddcSJakub Kicinski return 0; 4197fd068ddcSJakub Kicinski } 4198fd068ddcSJakub Kicinski 419944a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 420044a12eccSJakub Kicinski { 420144a12eccSJakub Kicinski void *prog; 420244a12eccSJakub Kicinski 420344a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 420444a12eccSJakub Kicinski if (!prog) 420544a12eccSJakub Kicinski return; 420644a12eccSJakub Kicinski 420744a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 420844a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 420944a12eccSJakub Kicinski kvfree(nfp_prog->prog); 421044a12eccSJakub Kicinski nfp_prog->prog = prog; 421144a12eccSJakub Kicinski } 421244a12eccSJakub Kicinski 4213c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 4214d9ae7f2bSJakub Kicinski { 4215d9ae7f2bSJakub Kicinski int ret; 4216d9ae7f2bSJakub Kicinski 4217b4264c96SJakub Kicinski ret = nfp_bpf_replace_map_ptrs(nfp_prog); 4218b4264c96SJakub Kicinski if (ret) 4219b4264c96SJakub Kicinski return ret; 4220b4264c96SJakub Kicinski 4221d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 4222d9ae7f2bSJakub Kicinski if (ret) 42239314c442SJakub Kicinski return ret; 4224d9ae7f2bSJakub Kicinski 4225d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 4226d9ae7f2bSJakub Kicinski if (ret) { 4227d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 4228d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 42299314c442SJakub Kicinski return -EINVAL; 4230d9ae7f2bSJakub Kicinski } 4231d9ae7f2bSJakub Kicinski 423244a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 423344a12eccSJakub Kicinski 42342314fe9eSJakub Kicinski return ret; 4235d9ae7f2bSJakub Kicinski } 42361549921dSJakub Kicinski 42371549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt) 42381549921dSJakub Kicinski { 42391549921dSJakub Kicinski struct nfp_insn_meta *meta; 42401549921dSJakub Kicinski 42411549921dSJakub Kicinski /* Another pass to record jump information. */ 42421549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 42431549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 4244e3b49dc6SQuentin Monnet u64 code = meta->insn.code; 4245e3b49dc6SQuentin Monnet unsigned int dst_idx; 4246e3b49dc6SQuentin Monnet bool pseudo_call; 42471549921dSJakub Kicinski 4248e3b49dc6SQuentin Monnet if (BPF_CLASS(code) != BPF_JMP) 4249e3b49dc6SQuentin Monnet continue; 4250e3b49dc6SQuentin Monnet if (BPF_OP(code) == BPF_EXIT) 4251e3b49dc6SQuentin Monnet continue; 4252e3b49dc6SQuentin Monnet if (is_mbpf_helper_call(meta)) 4253e3b49dc6SQuentin Monnet continue; 42541549921dSJakub Kicinski 4255e3b49dc6SQuentin Monnet /* If opcode is BPF_CALL at this point, this can only be a 4256e3b49dc6SQuentin Monnet * BPF-to-BPF call (a.k.a pseudo call). 4257e3b49dc6SQuentin Monnet */ 4258e3b49dc6SQuentin Monnet pseudo_call = BPF_OP(code) == BPF_CALL; 4259e3b49dc6SQuentin Monnet 4260e3b49dc6SQuentin Monnet if (pseudo_call) 4261e3b49dc6SQuentin Monnet dst_idx = meta->n + 1 + meta->insn.imm; 4262e3b49dc6SQuentin Monnet else 4263e3b49dc6SQuentin Monnet dst_idx = meta->n + 1 + meta->insn.off; 4264e3b49dc6SQuentin Monnet 4265e3b49dc6SQuentin Monnet dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_idx, cnt); 4266e3b49dc6SQuentin Monnet 4267e3b49dc6SQuentin Monnet if (pseudo_call) 4268e3b49dc6SQuentin Monnet dst_meta->flags |= FLAG_INSN_IS_SUBPROG_START; 4269e3b49dc6SQuentin Monnet 42701549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 4271e3b49dc6SQuentin Monnet meta->jmp_dst = dst_meta; 42721549921dSJakub Kicinski } 42731549921dSJakub Kicinski } 42742314fe9eSJakub Kicinski 427574801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 427674801e50SQuentin Monnet { 427774801e50SQuentin Monnet return !!instr_cb[code]; 427874801e50SQuentin Monnet } 427974801e50SQuentin Monnet 42802314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 42812314fe9eSJakub Kicinski { 42822314fe9eSJakub Kicinski unsigned int i; 42832314fe9eSJakub Kicinski u64 *prog; 42842314fe9eSJakub Kicinski int err; 42852314fe9eSJakub Kicinski 42862314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 42872314fe9eSJakub Kicinski GFP_KERNEL); 42882314fe9eSJakub Kicinski if (!prog) 42892314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 42902314fe9eSJakub Kicinski 42912314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 42922314fe9eSJakub Kicinski enum nfp_relo_type special; 429377a3d311SJakub Kicinski u32 val; 4294389f263bSQuentin Monnet u16 off; 42952314fe9eSJakub Kicinski 42962314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 42972314fe9eSJakub Kicinski switch (special) { 42982314fe9eSJakub Kicinski case RELO_NONE: 42992314fe9eSJakub Kicinski continue; 43002314fe9eSJakub Kicinski case RELO_BR_REL: 43012314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 43022314fe9eSJakub Kicinski break; 43032314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 43042314fe9eSJakub Kicinski br_set_offset(&prog[i], 43052314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 43062314fe9eSJakub Kicinski break; 43072314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 43082314fe9eSJakub Kicinski br_set_offset(&prog[i], 43092314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 43102314fe9eSJakub Kicinski break; 4311389f263bSQuentin Monnet case RELO_BR_GO_CALL_PUSH_REGS: 4312389f263bSQuentin Monnet off = nfp_prog->tgt_call_push_regs + bv->start_off; 4313389f263bSQuentin Monnet br_set_offset(&prog[i], off); 4314389f263bSQuentin Monnet break; 4315389f263bSQuentin Monnet case RELO_BR_GO_CALL_POP_REGS: 4316389f263bSQuentin Monnet off = nfp_prog->tgt_call_pop_regs + bv->start_off; 4317389f263bSQuentin Monnet br_set_offset(&prog[i], off); 4318389f263bSQuentin Monnet break; 43192314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 43202314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 43212314fe9eSJakub Kicinski break; 432277a3d311SJakub Kicinski case RELO_BR_HELPER: 432377a3d311SJakub Kicinski val = br_get_offset(prog[i]); 432477a3d311SJakub Kicinski val -= BR_OFF_RELO; 432577a3d311SJakub Kicinski switch (val) { 432677a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 432777a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 432877a3d311SJakub Kicinski break; 432944d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 433044d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 433144d65a47SJakub Kicinski break; 4332bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 4333bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 4334bfee64deSJakub Kicinski break; 43359816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 43369816dd35SJakub Kicinski val = nfp_prog->bpf->helpers.perf_event_output; 43379816dd35SJakub Kicinski break; 433877a3d311SJakub Kicinski default: 433977a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 434077a3d311SJakub Kicinski val); 434177a3d311SJakub Kicinski err = -EINVAL; 434277a3d311SJakub Kicinski goto err_free_prog; 434377a3d311SJakub Kicinski } 434477a3d311SJakub Kicinski br_set_offset(&prog[i], val); 434577a3d311SJakub Kicinski break; 434677a3d311SJakub Kicinski case RELO_IMMED_REL: 434777a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 434877a3d311SJakub Kicinski break; 43492314fe9eSJakub Kicinski } 43502314fe9eSJakub Kicinski 43512314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 43522314fe9eSJakub Kicinski } 43532314fe9eSJakub Kicinski 43542314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 43552314fe9eSJakub Kicinski if (err) 43562314fe9eSJakub Kicinski goto err_free_prog; 43572314fe9eSJakub Kicinski 43582314fe9eSJakub Kicinski return prog; 43592314fe9eSJakub Kicinski 43602314fe9eSJakub Kicinski err_free_prog: 43612314fe9eSJakub Kicinski kfree(prog); 43622314fe9eSJakub Kicinski return ERR_PTR(err); 43632314fe9eSJakub Kicinski } 4364