196de2506SJakub Kicinski // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 296de2506SJakub Kicinski /* Copyright (C) 2016-2018 Netronome Systems, Inc. */ 3d9ae7f2bSJakub Kicinski 4d9ae7f2bSJakub Kicinski #define pr_fmt(fmt) "NFP net bpf: " fmt 5d9ae7f2bSJakub Kicinski 60d49eaf4SJakub Kicinski #include <linux/bug.h> 7d9ae7f2bSJakub Kicinski #include <linux/bpf.h> 8d9ae7f2bSJakub Kicinski #include <linux/filter.h> 92a952b03SJiong Wang #include <linux/kernel.h> 10d9ae7f2bSJakub Kicinski #include <linux/pkt_cls.h> 112a952b03SJiong Wang #include <linux/reciprocal_div.h> 12d9ae7f2bSJakub Kicinski #include <linux/unistd.h> 13d9ae7f2bSJakub Kicinski 14d9ae7f2bSJakub Kicinski #include "main.h" 15d9ae7f2bSJakub Kicinski #include "../nfp_asm.h" 16d985888fSJakub Kicinski #include "../nfp_net_ctrl.h" 17d9ae7f2bSJakub Kicinski 18d9ae7f2bSJakub Kicinski /* --- NFP prog --- */ 19d9ae7f2bSJakub Kicinski /* Foreach "multiple" entries macros provide pos and next<n> pointers. 20d9ae7f2bSJakub Kicinski * It's safe to modify the next pointers (but not pos). 21d9ae7f2bSJakub Kicinski */ 22d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk2(nfp_prog, pos, next) \ 23d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 24d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l); \ 25d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 26d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l; \ 27d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 28d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos)) 29d9ae7f2bSJakub Kicinski 30d9ae7f2bSJakub Kicinski #define nfp_for_each_insn_walk3(nfp_prog, pos, next, next2) \ 31d9ae7f2bSJakub Kicinski for (pos = list_first_entry(&(nfp_prog)->insns, typeof(*pos), l), \ 32d9ae7f2bSJakub Kicinski next = list_next_entry(pos, l), \ 33d9ae7f2bSJakub Kicinski next2 = list_next_entry(next, l); \ 34d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &pos->l && \ 35d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next->l && \ 36d9ae7f2bSJakub Kicinski &(nfp_prog)->insns != &next2->l; \ 37d9ae7f2bSJakub Kicinski pos = nfp_meta_next(pos), \ 38d9ae7f2bSJakub Kicinski next = nfp_meta_next(pos), \ 39d9ae7f2bSJakub Kicinski next2 = nfp_meta_next(next)) 40d9ae7f2bSJakub Kicinski 41d9ae7f2bSJakub Kicinski static bool 42d9ae7f2bSJakub Kicinski nfp_meta_has_prev(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 43d9ae7f2bSJakub Kicinski { 44d9ae7f2bSJakub Kicinski return meta->l.prev != &nfp_prog->insns; 45d9ae7f2bSJakub Kicinski } 46d9ae7f2bSJakub Kicinski 47d9ae7f2bSJakub Kicinski static void nfp_prog_push(struct nfp_prog *nfp_prog, u64 insn) 48d9ae7f2bSJakub Kicinski { 49e8a4796eSJakub Kicinski if (nfp_prog->__prog_alloc_len / sizeof(u64) == nfp_prog->prog_len) { 50e8a4796eSJakub Kicinski pr_warn("instruction limit reached (%u NFP instructions)\n", 51e8a4796eSJakub Kicinski nfp_prog->prog_len); 52d9ae7f2bSJakub Kicinski nfp_prog->error = -ENOSPC; 53d9ae7f2bSJakub Kicinski return; 54d9ae7f2bSJakub Kicinski } 55d9ae7f2bSJakub Kicinski 56d9ae7f2bSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len] = insn; 57d9ae7f2bSJakub Kicinski nfp_prog->prog_len++; 58d9ae7f2bSJakub Kicinski } 59d9ae7f2bSJakub Kicinski 60d9ae7f2bSJakub Kicinski static unsigned int nfp_prog_current_offset(struct nfp_prog *nfp_prog) 61d9ae7f2bSJakub Kicinski { 622314fe9eSJakub Kicinski return nfp_prog->prog_len; 63d9ae7f2bSJakub Kicinski } 64d9ae7f2bSJakub Kicinski 650d49eaf4SJakub Kicinski static bool 660d49eaf4SJakub Kicinski nfp_prog_confirm_current_offset(struct nfp_prog *nfp_prog, unsigned int off) 670d49eaf4SJakub Kicinski { 680d49eaf4SJakub Kicinski /* If there is a recorded error we may have dropped instructions; 690d49eaf4SJakub Kicinski * that doesn't have to be due to translator bug, and the translation 700d49eaf4SJakub Kicinski * will fail anyway, so just return OK. 710d49eaf4SJakub Kicinski */ 720d49eaf4SJakub Kicinski if (nfp_prog->error) 730d49eaf4SJakub Kicinski return true; 740d49eaf4SJakub Kicinski return !WARN_ON_ONCE(nfp_prog_current_offset(nfp_prog) != off); 750d49eaf4SJakub Kicinski } 760d49eaf4SJakub Kicinski 77d9ae7f2bSJakub Kicinski /* --- Emitters --- */ 78d9ae7f2bSJakub Kicinski static void 79d9ae7f2bSJakub Kicinski __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, 80b556ddd9SJakub Kicinski u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, enum cmd_ctx_swap ctx, 81b556ddd9SJakub Kicinski bool indir) 82d9ae7f2bSJakub Kicinski { 83d9ae7f2bSJakub Kicinski u64 insn; 84d9ae7f2bSJakub Kicinski 85d9ae7f2bSJakub Kicinski insn = FIELD_PREP(OP_CMD_A_SRC, areg) | 86d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CTX, ctx) | 87d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_B_SRC, breg) | 88d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TOKEN, cmd_tgt_act[op].token) | 89d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_XFER, xfer) | 90d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_CNT, size) | 91b556ddd9SJakub Kicinski FIELD_PREP(OP_CMD_SIG, ctx != CMD_CTX_NO_SWAP) | 92d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) | 935468a8b9SJakub Kicinski FIELD_PREP(OP_CMD_INDIR, indir) | 94d9ae7f2bSJakub Kicinski FIELD_PREP(OP_CMD_MODE, mode); 95d9ae7f2bSJakub Kicinski 96d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 97d9ae7f2bSJakub Kicinski } 98d9ae7f2bSJakub Kicinski 99d9ae7f2bSJakub Kicinski static void 1005468a8b9SJakub Kicinski emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 101b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx, bool indir) 102d9ae7f2bSJakub Kicinski { 103d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 104d9ae7f2bSJakub Kicinski int err; 105d9ae7f2bSJakub Kicinski 106d9ae7f2bSJakub Kicinski err = swreg_to_restricted(reg_none(), lreg, rreg, ®, false); 107d9ae7f2bSJakub Kicinski if (err) { 108d9ae7f2bSJakub Kicinski nfp_prog->error = err; 109d9ae7f2bSJakub Kicinski return; 110d9ae7f2bSJakub Kicinski } 111d9ae7f2bSJakub Kicinski if (reg.swap) { 112d9ae7f2bSJakub Kicinski pr_err("cmd can't swap arguments\n"); 113d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 114d9ae7f2bSJakub Kicinski return; 115d9ae7f2bSJakub Kicinski } 116995e101fSJakub Kicinski if (reg.dst_lmextn || reg.src_lmextn) { 117995e101fSJakub Kicinski pr_err("cmd can't use LMextn\n"); 118995e101fSJakub Kicinski nfp_prog->error = -EFAULT; 119995e101fSJakub Kicinski return; 120995e101fSJakub Kicinski } 121d9ae7f2bSJakub Kicinski 122b556ddd9SJakub Kicinski __emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, ctx, 1235468a8b9SJakub Kicinski indir); 1245468a8b9SJakub Kicinski } 1255468a8b9SJakub Kicinski 1265468a8b9SJakub Kicinski static void 1275468a8b9SJakub Kicinski emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 128b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1295468a8b9SJakub Kicinski { 130b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, false); 131d9ae7f2bSJakub Kicinski } 132d9ae7f2bSJakub Kicinski 133d9ae7f2bSJakub Kicinski static void 1349879a381SJiong Wang emit_cmd_indir(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer, 135b556ddd9SJakub Kicinski swreg lreg, swreg rreg, u8 size, enum cmd_ctx_swap ctx) 1369879a381SJiong Wang { 137b556ddd9SJakub Kicinski emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, ctx, true); 1389879a381SJiong Wang } 1399879a381SJiong Wang 1409879a381SJiong Wang static void 141d9ae7f2bSJakub Kicinski __emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, enum br_ev_pip ev_pip, 142d9ae7f2bSJakub Kicinski enum br_ctx_signal_state css, u16 addr, u8 defer) 143d9ae7f2bSJakub Kicinski { 144d9ae7f2bSJakub Kicinski u16 addr_lo, addr_hi; 145d9ae7f2bSJakub Kicinski u64 insn; 146d9ae7f2bSJakub Kicinski 147d9ae7f2bSJakub Kicinski addr_lo = addr & (OP_BR_ADDR_LO >> __bf_shf(OP_BR_ADDR_LO)); 148d9ae7f2bSJakub Kicinski addr_hi = addr != addr_lo; 149d9ae7f2bSJakub Kicinski 150d9ae7f2bSJakub Kicinski insn = OP_BR_BASE | 151d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_MASK, mask) | 152d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_EV_PIP, ev_pip) | 153d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_CSS, css) | 154d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_DEFBR, defer) | 155d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_LO, addr_lo) | 156d9ae7f2bSJakub Kicinski FIELD_PREP(OP_BR_ADDR_HI, addr_hi); 157d9ae7f2bSJakub Kicinski 158d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 159d9ae7f2bSJakub Kicinski } 160d9ae7f2bSJakub Kicinski 1612314fe9eSJakub Kicinski static void 1622314fe9eSJakub Kicinski emit_br_relo(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer, 1632314fe9eSJakub Kicinski enum nfp_relo_type relo) 164d9ae7f2bSJakub Kicinski { 1652314fe9eSJakub Kicinski if (mask == BR_UNC && defer > 2) { 166d9ae7f2bSJakub Kicinski pr_err("BUG: branch defer out of bounds %d\n", defer); 167d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 168d9ae7f2bSJakub Kicinski return; 169d9ae7f2bSJakub Kicinski } 1702314fe9eSJakub Kicinski 1712314fe9eSJakub Kicinski __emit_br(nfp_prog, mask, 1722314fe9eSJakub Kicinski mask != BR_UNC ? BR_EV_PIP_COND : BR_EV_PIP_UNCOND, 1732314fe9eSJakub Kicinski BR_CSS_NONE, addr, defer); 1742314fe9eSJakub Kicinski 1752314fe9eSJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 1762314fe9eSJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 177d9ae7f2bSJakub Kicinski } 178d9ae7f2bSJakub Kicinski 179d9ae7f2bSJakub Kicinski static void 180d9ae7f2bSJakub Kicinski emit_br(struct nfp_prog *nfp_prog, enum br_mask mask, u16 addr, u8 defer) 181d9ae7f2bSJakub Kicinski { 1822314fe9eSJakub Kicinski emit_br_relo(nfp_prog, mask, addr, defer, RELO_BR_REL); 183d9ae7f2bSJakub Kicinski } 184d9ae7f2bSJakub Kicinski 185d9ae7f2bSJakub Kicinski static void 186991f5b36SJiong Wang __emit_br_bit(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 addr, u8 defer, 187991f5b36SJiong Wang bool set, bool src_lmextn) 188991f5b36SJiong Wang { 189991f5b36SJiong Wang u16 addr_lo, addr_hi; 190991f5b36SJiong Wang u64 insn; 191991f5b36SJiong Wang 192991f5b36SJiong Wang addr_lo = addr & (OP_BR_BIT_ADDR_LO >> __bf_shf(OP_BR_BIT_ADDR_LO)); 193991f5b36SJiong Wang addr_hi = addr != addr_lo; 194991f5b36SJiong Wang 195991f5b36SJiong Wang insn = OP_BR_BIT_BASE | 196991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_A_SRC, areg) | 197991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_B_SRC, breg) | 198991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_BV, set) | 199991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_DEFBR, defer) | 200991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_ADDR_LO, addr_lo) | 201991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_ADDR_HI, addr_hi) | 202991f5b36SJiong Wang FIELD_PREP(OP_BR_BIT_SRC_LMEXTN, src_lmextn); 203991f5b36SJiong Wang 204991f5b36SJiong Wang nfp_prog_push(nfp_prog, insn); 205991f5b36SJiong Wang } 206991f5b36SJiong Wang 207991f5b36SJiong Wang static void 208991f5b36SJiong Wang emit_br_bit_relo(struct nfp_prog *nfp_prog, swreg src, u8 bit, u16 addr, 209991f5b36SJiong Wang u8 defer, bool set, enum nfp_relo_type relo) 210991f5b36SJiong Wang { 211991f5b36SJiong Wang struct nfp_insn_re_regs reg; 212991f5b36SJiong Wang int err; 213991f5b36SJiong Wang 214991f5b36SJiong Wang /* NOTE: The bit to test is specified as an rotation amount, such that 215991f5b36SJiong Wang * the bit to test will be placed on the MSB of the result when 216991f5b36SJiong Wang * doing a rotate right. For bit X, we need right rotate X + 1. 217991f5b36SJiong Wang */ 218991f5b36SJiong Wang bit += 1; 219991f5b36SJiong Wang 220991f5b36SJiong Wang err = swreg_to_restricted(reg_none(), src, reg_imm(bit), ®, false); 221991f5b36SJiong Wang if (err) { 222991f5b36SJiong Wang nfp_prog->error = err; 223991f5b36SJiong Wang return; 224991f5b36SJiong Wang } 225991f5b36SJiong Wang 226991f5b36SJiong Wang __emit_br_bit(nfp_prog, reg.areg, reg.breg, addr, defer, set, 227991f5b36SJiong Wang reg.src_lmextn); 228991f5b36SJiong Wang 229991f5b36SJiong Wang nfp_prog->prog[nfp_prog->prog_len - 1] |= 230991f5b36SJiong Wang FIELD_PREP(OP_RELO_TYPE, relo); 231991f5b36SJiong Wang } 232991f5b36SJiong Wang 233991f5b36SJiong Wang static void 234991f5b36SJiong Wang emit_br_bset(struct nfp_prog *nfp_prog, swreg src, u8 bit, u16 addr, u8 defer) 235991f5b36SJiong Wang { 236991f5b36SJiong Wang emit_br_bit_relo(nfp_prog, src, bit, addr, defer, true, RELO_BR_REL); 237991f5b36SJiong Wang } 238991f5b36SJiong Wang 239991f5b36SJiong Wang static void 240389f263bSQuentin Monnet __emit_br_alu(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 241389f263bSQuentin Monnet u8 defer, bool dst_lmextn, bool src_lmextn) 242389f263bSQuentin Monnet { 243389f263bSQuentin Monnet u64 insn; 244389f263bSQuentin Monnet 245389f263bSQuentin Monnet insn = OP_BR_ALU_BASE | 246389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_A_SRC, areg) | 247389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_B_SRC, breg) | 248389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_DEFBR, defer) | 249389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_IMM_HI, imm_hi) | 250389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_SRC_LMEXTN, src_lmextn) | 251389f263bSQuentin Monnet FIELD_PREP(OP_BR_ALU_DST_LMEXTN, dst_lmextn); 252389f263bSQuentin Monnet 253389f263bSQuentin Monnet nfp_prog_push(nfp_prog, insn); 254389f263bSQuentin Monnet } 255389f263bSQuentin Monnet 256389f263bSQuentin Monnet static void emit_rtn(struct nfp_prog *nfp_prog, swreg base, u8 defer) 257389f263bSQuentin Monnet { 258389f263bSQuentin Monnet struct nfp_insn_ur_regs reg; 259389f263bSQuentin Monnet int err; 260389f263bSQuentin Monnet 261389f263bSQuentin Monnet err = swreg_to_unrestricted(reg_none(), base, reg_imm(0), ®); 262389f263bSQuentin Monnet if (err) { 263389f263bSQuentin Monnet nfp_prog->error = err; 264389f263bSQuentin Monnet return; 265389f263bSQuentin Monnet } 266389f263bSQuentin Monnet 267389f263bSQuentin Monnet __emit_br_alu(nfp_prog, reg.areg, reg.breg, 0, defer, reg.dst_lmextn, 268389f263bSQuentin Monnet reg.src_lmextn); 269389f263bSQuentin Monnet } 270389f263bSQuentin Monnet 271389f263bSQuentin Monnet static void 272d9ae7f2bSJakub Kicinski __emit_immed(struct nfp_prog *nfp_prog, u16 areg, u16 breg, u16 imm_hi, 273d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, 274995e101fSJakub Kicinski enum immed_shift shift, bool wr_both, 275995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 276d9ae7f2bSJakub Kicinski { 277d9ae7f2bSJakub Kicinski u64 insn; 278d9ae7f2bSJakub Kicinski 279d9ae7f2bSJakub Kicinski insn = OP_IMMED_BASE | 280d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_A_SRC, areg) | 281d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_B_SRC, breg) | 282d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_IMM, imm_hi) | 283d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_WIDTH, width) | 284d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_INV, invert) | 285d9ae7f2bSJakub Kicinski FIELD_PREP(OP_IMMED_SHIFT, shift) | 286995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_WR_AB, wr_both) | 287995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_SRC_LMEXTN, src_lmextn) | 288995e101fSJakub Kicinski FIELD_PREP(OP_IMMED_DST_LMEXTN, dst_lmextn); 289d9ae7f2bSJakub Kicinski 290d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 291d9ae7f2bSJakub Kicinski } 292d9ae7f2bSJakub Kicinski 293d9ae7f2bSJakub Kicinski static void 294b3f868dfSJakub Kicinski emit_immed(struct nfp_prog *nfp_prog, swreg dst, u16 imm, 295d9ae7f2bSJakub Kicinski enum immed_width width, bool invert, enum immed_shift shift) 296d9ae7f2bSJakub Kicinski { 297d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 298d9ae7f2bSJakub Kicinski int err; 299d9ae7f2bSJakub Kicinski 300b3f868dfSJakub Kicinski if (swreg_type(dst) == NN_REG_IMM) { 301d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 302d9ae7f2bSJakub Kicinski return; 303d9ae7f2bSJakub Kicinski } 304d9ae7f2bSJakub Kicinski 305d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, dst, reg_imm(imm & 0xff), ®); 306d9ae7f2bSJakub Kicinski if (err) { 307d9ae7f2bSJakub Kicinski nfp_prog->error = err; 308d9ae7f2bSJakub Kicinski return; 309d9ae7f2bSJakub Kicinski } 310d9ae7f2bSJakub Kicinski 3113239e7bbSJiong Wang /* Use reg.dst when destination is No-Dest. */ 3123239e7bbSJiong Wang __emit_immed(nfp_prog, 3133239e7bbSJiong Wang swreg_type(dst) == NN_REG_NONE ? reg.dst : reg.areg, 3143239e7bbSJiong Wang reg.breg, imm >> 8, width, invert, shift, 3153239e7bbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 316d9ae7f2bSJakub Kicinski } 317d9ae7f2bSJakub Kicinski 318d9ae7f2bSJakub Kicinski static void 319d9ae7f2bSJakub Kicinski __emit_shf(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 320d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift, 321995e101fSJakub Kicinski u16 areg, enum shf_op op, u16 breg, bool i8, bool sw, bool wr_both, 322995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 323d9ae7f2bSJakub Kicinski { 324d9ae7f2bSJakub Kicinski u64 insn; 325d9ae7f2bSJakub Kicinski 326d9ae7f2bSJakub Kicinski if (!FIELD_FIT(OP_SHF_SHIFT, shift)) { 327d9ae7f2bSJakub Kicinski nfp_prog->error = -EFAULT; 328d9ae7f2bSJakub Kicinski return; 329d9ae7f2bSJakub Kicinski } 330d9ae7f2bSJakub Kicinski 33169e168ebSJiong Wang /* NFP shift instruction has something special. If shift direction is 33269e168ebSJiong Wang * left then shift amount of 1 to 31 is specified as 32 minus the amount 33369e168ebSJiong Wang * to shift. 33469e168ebSJiong Wang * 33569e168ebSJiong Wang * But no need to do this for indirect shift which has shift amount be 33669e168ebSJiong Wang * 0. Even after we do this subtraction, shift amount 0 will be turned 33769e168ebSJiong Wang * into 32 which will eventually be encoded the same as 0 because only 33869e168ebSJiong Wang * low 5 bits are encoded, but shift amount be 32 will fail the 33969e168ebSJiong Wang * FIELD_PREP check done later on shift mask (0x1f), due to 32 is out of 34069e168ebSJiong Wang * mask range. 34169e168ebSJiong Wang */ 34269e168ebSJiong Wang if (sc == SHF_SC_L_SHF && shift) 343d9ae7f2bSJakub Kicinski shift = 32 - shift; 344d9ae7f2bSJakub Kicinski 345d9ae7f2bSJakub Kicinski insn = OP_SHF_BASE | 346d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_A_SRC, areg) | 347d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SC, sc) | 348d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_B_SRC, breg) | 349d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_I8, i8) | 350d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SW, sw) | 351d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST, dst) | 352d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_SHIFT, shift) | 353d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_OP, op) | 354d9ae7f2bSJakub Kicinski FIELD_PREP(OP_SHF_DST_AB, dst_ab) | 355995e101fSJakub Kicinski FIELD_PREP(OP_SHF_WR_AB, wr_both) | 356995e101fSJakub Kicinski FIELD_PREP(OP_SHF_SRC_LMEXTN, src_lmextn) | 357995e101fSJakub Kicinski FIELD_PREP(OP_SHF_DST_LMEXTN, dst_lmextn); 358d9ae7f2bSJakub Kicinski 359d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 360d9ae7f2bSJakub Kicinski } 361d9ae7f2bSJakub Kicinski 362d9ae7f2bSJakub Kicinski static void 363b3f868dfSJakub Kicinski emit_shf(struct nfp_prog *nfp_prog, swreg dst, 364b3f868dfSJakub Kicinski swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc, u8 shift) 365d9ae7f2bSJakub Kicinski { 366d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 367d9ae7f2bSJakub Kicinski int err; 368d9ae7f2bSJakub Kicinski 369d9ae7f2bSJakub Kicinski err = swreg_to_restricted(dst, lreg, rreg, ®, true); 370d9ae7f2bSJakub Kicinski if (err) { 371d9ae7f2bSJakub Kicinski nfp_prog->error = err; 372d9ae7f2bSJakub Kicinski return; 373d9ae7f2bSJakub Kicinski } 374d9ae7f2bSJakub Kicinski 375d9ae7f2bSJakub Kicinski __emit_shf(nfp_prog, reg.dst, reg.dst_ab, sc, shift, 376995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.i8, reg.swap, reg.wr_both, 377995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 378d9ae7f2bSJakub Kicinski } 379d9ae7f2bSJakub Kicinski 380d9ae7f2bSJakub Kicinski static void 381991f5b36SJiong Wang emit_shf_indir(struct nfp_prog *nfp_prog, swreg dst, 382991f5b36SJiong Wang swreg lreg, enum shf_op op, swreg rreg, enum shf_sc sc) 383991f5b36SJiong Wang { 384991f5b36SJiong Wang if (sc == SHF_SC_R_ROT) { 385991f5b36SJiong Wang pr_err("indirect shift is not allowed on rotation\n"); 386991f5b36SJiong Wang nfp_prog->error = -EFAULT; 387991f5b36SJiong Wang return; 388991f5b36SJiong Wang } 389991f5b36SJiong Wang 390991f5b36SJiong Wang emit_shf(nfp_prog, dst, lreg, op, rreg, sc, 0); 391991f5b36SJiong Wang } 392991f5b36SJiong Wang 393991f5b36SJiong Wang static void 394d9ae7f2bSJakub Kicinski __emit_alu(struct nfp_prog *nfp_prog, u16 dst, enum alu_dst_ab dst_ab, 395995e101fSJakub Kicinski u16 areg, enum alu_op op, u16 breg, bool swap, bool wr_both, 396995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 397d9ae7f2bSJakub Kicinski { 398d9ae7f2bSJakub Kicinski u64 insn; 399d9ae7f2bSJakub Kicinski 400d9ae7f2bSJakub Kicinski insn = OP_ALU_BASE | 401d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_A_SRC, areg) | 402d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_B_SRC, breg) | 403d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST, dst) | 404d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_SW, swap) | 405d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_OP, op) | 406d9ae7f2bSJakub Kicinski FIELD_PREP(OP_ALU_DST_AB, dst_ab) | 407995e101fSJakub Kicinski FIELD_PREP(OP_ALU_WR_AB, wr_both) | 408995e101fSJakub Kicinski FIELD_PREP(OP_ALU_SRC_LMEXTN, src_lmextn) | 409995e101fSJakub Kicinski FIELD_PREP(OP_ALU_DST_LMEXTN, dst_lmextn); 410d9ae7f2bSJakub Kicinski 411d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 412d9ae7f2bSJakub Kicinski } 413d9ae7f2bSJakub Kicinski 414d9ae7f2bSJakub Kicinski static void 415b3f868dfSJakub Kicinski emit_alu(struct nfp_prog *nfp_prog, swreg dst, 416b3f868dfSJakub Kicinski swreg lreg, enum alu_op op, swreg rreg) 417d9ae7f2bSJakub Kicinski { 418d9ae7f2bSJakub Kicinski struct nfp_insn_ur_regs reg; 419d9ae7f2bSJakub Kicinski int err; 420d9ae7f2bSJakub Kicinski 421d9ae7f2bSJakub Kicinski err = swreg_to_unrestricted(dst, lreg, rreg, ®); 422d9ae7f2bSJakub Kicinski if (err) { 423d9ae7f2bSJakub Kicinski nfp_prog->error = err; 424d9ae7f2bSJakub Kicinski return; 425d9ae7f2bSJakub Kicinski } 426d9ae7f2bSJakub Kicinski 427d9ae7f2bSJakub Kicinski __emit_alu(nfp_prog, reg.dst, reg.dst_ab, 428995e101fSJakub Kicinski reg.areg, op, reg.breg, reg.swap, reg.wr_both, 429995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 430d9ae7f2bSJakub Kicinski } 431d9ae7f2bSJakub Kicinski 432d9ae7f2bSJakub Kicinski static void 433d3d23fdbSJiong Wang __emit_mul(struct nfp_prog *nfp_prog, enum alu_dst_ab dst_ab, u16 areg, 434d3d23fdbSJiong Wang enum mul_type type, enum mul_step step, u16 breg, bool swap, 435d3d23fdbSJiong Wang bool wr_both, bool dst_lmextn, bool src_lmextn) 436d3d23fdbSJiong Wang { 437d3d23fdbSJiong Wang u64 insn; 438d3d23fdbSJiong Wang 439d3d23fdbSJiong Wang insn = OP_MUL_BASE | 440d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_A_SRC, areg) | 441d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_B_SRC, breg) | 442d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_STEP, step) | 443d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_DST_AB, dst_ab) | 444d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_SW, swap) | 445d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_TYPE, type) | 446d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_WR_AB, wr_both) | 447d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_SRC_LMEXTN, src_lmextn) | 448d3d23fdbSJiong Wang FIELD_PREP(OP_MUL_DST_LMEXTN, dst_lmextn); 449d3d23fdbSJiong Wang 450d3d23fdbSJiong Wang nfp_prog_push(nfp_prog, insn); 451d3d23fdbSJiong Wang } 452d3d23fdbSJiong Wang 453d3d23fdbSJiong Wang static void 454d3d23fdbSJiong Wang emit_mul(struct nfp_prog *nfp_prog, swreg lreg, enum mul_type type, 455d3d23fdbSJiong Wang enum mul_step step, swreg rreg) 456d3d23fdbSJiong Wang { 457d3d23fdbSJiong Wang struct nfp_insn_ur_regs reg; 458d3d23fdbSJiong Wang u16 areg; 459d3d23fdbSJiong Wang int err; 460d3d23fdbSJiong Wang 461d3d23fdbSJiong Wang if (type == MUL_TYPE_START && step != MUL_STEP_NONE) { 462d3d23fdbSJiong Wang nfp_prog->error = -EINVAL; 463d3d23fdbSJiong Wang return; 464d3d23fdbSJiong Wang } 465d3d23fdbSJiong Wang 466d3d23fdbSJiong Wang if (step == MUL_LAST || step == MUL_LAST_2) { 467d3d23fdbSJiong Wang /* When type is step and step Number is LAST or LAST2, left 468d3d23fdbSJiong Wang * source is used as destination. 469d3d23fdbSJiong Wang */ 470d3d23fdbSJiong Wang err = swreg_to_unrestricted(lreg, reg_none(), rreg, ®); 471d3d23fdbSJiong Wang areg = reg.dst; 472d3d23fdbSJiong Wang } else { 473d3d23fdbSJiong Wang err = swreg_to_unrestricted(reg_none(), lreg, rreg, ®); 474d3d23fdbSJiong Wang areg = reg.areg; 475d3d23fdbSJiong Wang } 476d3d23fdbSJiong Wang 477d3d23fdbSJiong Wang if (err) { 478d3d23fdbSJiong Wang nfp_prog->error = err; 479d3d23fdbSJiong Wang return; 480d3d23fdbSJiong Wang } 481d3d23fdbSJiong Wang 482d3d23fdbSJiong Wang __emit_mul(nfp_prog, reg.dst_ab, areg, type, step, reg.breg, reg.swap, 483d3d23fdbSJiong Wang reg.wr_both, reg.dst_lmextn, reg.src_lmextn); 484d3d23fdbSJiong Wang } 485d3d23fdbSJiong Wang 486d3d23fdbSJiong Wang static void 487d9ae7f2bSJakub Kicinski __emit_ld_field(struct nfp_prog *nfp_prog, enum shf_sc sc, 488d9ae7f2bSJakub Kicinski u8 areg, u8 bmask, u8 breg, u8 shift, bool imm8, 489995e101fSJakub Kicinski bool zero, bool swap, bool wr_both, 490995e101fSJakub Kicinski bool dst_lmextn, bool src_lmextn) 491d9ae7f2bSJakub Kicinski { 492d9ae7f2bSJakub Kicinski u64 insn; 493d9ae7f2bSJakub Kicinski 494d9ae7f2bSJakub Kicinski insn = OP_LDF_BASE | 495d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_A_SRC, areg) | 496d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SC, sc) | 497d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_B_SRC, breg) | 498d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_I8, imm8) | 499d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SW, swap) | 500d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_ZF, zero) | 501d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_BMASK, bmask) | 502d9ae7f2bSJakub Kicinski FIELD_PREP(OP_LDF_SHF, shift) | 503995e101fSJakub Kicinski FIELD_PREP(OP_LDF_WR_AB, wr_both) | 504995e101fSJakub Kicinski FIELD_PREP(OP_LDF_SRC_LMEXTN, src_lmextn) | 505995e101fSJakub Kicinski FIELD_PREP(OP_LDF_DST_LMEXTN, dst_lmextn); 506d9ae7f2bSJakub Kicinski 507d9ae7f2bSJakub Kicinski nfp_prog_push(nfp_prog, insn); 508d9ae7f2bSJakub Kicinski } 509d9ae7f2bSJakub Kicinski 510d9ae7f2bSJakub Kicinski static void 511bc8c80a8SJakub Kicinski emit_ld_field_any(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 512bc8c80a8SJakub Kicinski enum shf_sc sc, u8 shift, bool zero) 513d9ae7f2bSJakub Kicinski { 514d9ae7f2bSJakub Kicinski struct nfp_insn_re_regs reg; 515d9ae7f2bSJakub Kicinski int err; 516d9ae7f2bSJakub Kicinski 5172de1be1dSJakub Kicinski /* Note: ld_field is special as it uses one of the src regs as dst */ 5182de1be1dSJakub Kicinski err = swreg_to_restricted(dst, dst, src, ®, true); 519d9ae7f2bSJakub Kicinski if (err) { 520d9ae7f2bSJakub Kicinski nfp_prog->error = err; 521d9ae7f2bSJakub Kicinski return; 522d9ae7f2bSJakub Kicinski } 523d9ae7f2bSJakub Kicinski 524d9ae7f2bSJakub Kicinski __emit_ld_field(nfp_prog, sc, reg.areg, bmask, reg.breg, shift, 525995e101fSJakub Kicinski reg.i8, zero, reg.swap, reg.wr_both, 526995e101fSJakub Kicinski reg.dst_lmextn, reg.src_lmextn); 527d9ae7f2bSJakub Kicinski } 528d9ae7f2bSJakub Kicinski 529d9ae7f2bSJakub Kicinski static void 530b3f868dfSJakub Kicinski emit_ld_field(struct nfp_prog *nfp_prog, swreg dst, u8 bmask, swreg src, 531d9ae7f2bSJakub Kicinski enum shf_sc sc, u8 shift) 532d9ae7f2bSJakub Kicinski { 533bc8c80a8SJakub Kicinski emit_ld_field_any(nfp_prog, dst, bmask, src, sc, shift, false); 534d9ae7f2bSJakub Kicinski } 535d9ae7f2bSJakub Kicinski 5362df03a50SJakub Kicinski static void 5372df03a50SJakub Kicinski __emit_lcsr(struct nfp_prog *nfp_prog, u16 areg, u16 breg, bool wr, u16 addr, 5382df03a50SJakub Kicinski bool dst_lmextn, bool src_lmextn) 5392df03a50SJakub Kicinski { 5402df03a50SJakub Kicinski u64 insn; 5412df03a50SJakub Kicinski 5422df03a50SJakub Kicinski insn = OP_LCSR_BASE | 5432df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_A_SRC, areg) | 5442df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_B_SRC, breg) | 5452df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_WRITE, wr) | 546df4a37d8SJakub Kicinski FIELD_PREP(OP_LCSR_ADDR, addr / 4) | 5472df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_SRC_LMEXTN, src_lmextn) | 5482df03a50SJakub Kicinski FIELD_PREP(OP_LCSR_DST_LMEXTN, dst_lmextn); 5492df03a50SJakub Kicinski 5502df03a50SJakub Kicinski nfp_prog_push(nfp_prog, insn); 5512df03a50SJakub Kicinski } 5522df03a50SJakub Kicinski 5532df03a50SJakub Kicinski static void emit_csr_wr(struct nfp_prog *nfp_prog, swreg src, u16 addr) 5542df03a50SJakub Kicinski { 5552df03a50SJakub Kicinski struct nfp_insn_ur_regs reg; 5562df03a50SJakub Kicinski int err; 5572df03a50SJakub Kicinski 5582df03a50SJakub Kicinski /* This instruction takes immeds instead of reg_none() for the ignored 5592df03a50SJakub Kicinski * operand, but we can't encode 2 immeds in one instr with our normal 5602df03a50SJakub Kicinski * swreg infra so if param is an immed, we encode as reg_none() and 5612df03a50SJakub Kicinski * copy the immed to both operands. 5622df03a50SJakub Kicinski */ 5632df03a50SJakub Kicinski if (swreg_type(src) == NN_REG_IMM) { 5642df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_none(), ®); 5652df03a50SJakub Kicinski reg.breg = reg.areg; 5662df03a50SJakub Kicinski } else { 5672df03a50SJakub Kicinski err = swreg_to_unrestricted(reg_none(), src, reg_imm(0), ®); 5682df03a50SJakub Kicinski } 5692df03a50SJakub Kicinski if (err) { 5702df03a50SJakub Kicinski nfp_prog->error = err; 5712df03a50SJakub Kicinski return; 5722df03a50SJakub Kicinski } 5732df03a50SJakub Kicinski 574df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, reg.areg, reg.breg, true, addr, 5752df03a50SJakub Kicinski false, reg.src_lmextn); 5762df03a50SJakub Kicinski } 5772df03a50SJakub Kicinski 578df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 579df4a37d8SJakub Kicinski static void __emit_csr_rd(struct nfp_prog *nfp_prog, u16 addr) 580df4a37d8SJakub Kicinski { 581df4a37d8SJakub Kicinski __emit_lcsr(nfp_prog, 0, 0, false, addr, false, false); 582df4a37d8SJakub Kicinski } 583df4a37d8SJakub Kicinski 5841c03e03fSJakub Kicinski static void emit_nop(struct nfp_prog *nfp_prog) 5851c03e03fSJakub Kicinski { 5861c03e03fSJakub Kicinski __emit_immed(nfp_prog, UR_REG_IMM, UR_REG_IMM, 0, 0, 0, 0, 0, 0, 0); 5871c03e03fSJakub Kicinski } 5881c03e03fSJakub Kicinski 589d9ae7f2bSJakub Kicinski /* --- Wrappers --- */ 590d9ae7f2bSJakub Kicinski static bool pack_immed(u32 imm, u16 *val, enum immed_shift *shift) 591d9ae7f2bSJakub Kicinski { 592d9ae7f2bSJakub Kicinski if (!(imm & 0xffff0000)) { 593d9ae7f2bSJakub Kicinski *val = imm; 594d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_0B; 595d9ae7f2bSJakub Kicinski } else if (!(imm & 0xff0000ff)) { 596d9ae7f2bSJakub Kicinski *val = imm >> 8; 597d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_1B; 598d9ae7f2bSJakub Kicinski } else if (!(imm & 0x0000ffff)) { 599d9ae7f2bSJakub Kicinski *val = imm >> 16; 600d9ae7f2bSJakub Kicinski *shift = IMMED_SHIFT_2B; 601d9ae7f2bSJakub Kicinski } else { 602d9ae7f2bSJakub Kicinski return false; 603d9ae7f2bSJakub Kicinski } 604d9ae7f2bSJakub Kicinski 605d9ae7f2bSJakub Kicinski return true; 606d9ae7f2bSJakub Kicinski } 607d9ae7f2bSJakub Kicinski 608b3f868dfSJakub Kicinski static void wrp_immed(struct nfp_prog *nfp_prog, swreg dst, u32 imm) 609d9ae7f2bSJakub Kicinski { 610d9ae7f2bSJakub Kicinski enum immed_shift shift; 611d9ae7f2bSJakub Kicinski u16 val; 612d9ae7f2bSJakub Kicinski 613d9ae7f2bSJakub Kicinski if (pack_immed(imm, &val, &shift)) { 614d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, false, shift); 615d9ae7f2bSJakub Kicinski } else if (pack_immed(~imm, &val, &shift)) { 616d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, val, IMMED_WIDTH_ALL, true, shift); 617d9ae7f2bSJakub Kicinski } else { 618d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm & 0xffff, IMMED_WIDTH_ALL, 619d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_0B); 620d9ae7f2bSJakub Kicinski emit_immed(nfp_prog, dst, imm >> 16, IMMED_WIDTH_WORD, 621d9ae7f2bSJakub Kicinski false, IMMED_SHIFT_2B); 622d9ae7f2bSJakub Kicinski } 623d9ae7f2bSJakub Kicinski } 624d9ae7f2bSJakub Kicinski 62577a3d311SJakub Kicinski static void 6260b4de1ffSJiong Wang wrp_zext(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, u8 dst) 6270b4de1ffSJiong Wang { 6280b4de1ffSJiong Wang if (meta->flags & FLAG_INSN_DO_ZEXT) 6290b4de1ffSJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 6300b4de1ffSJiong Wang } 6310b4de1ffSJiong Wang 6320b4de1ffSJiong Wang static void 63377a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 63477a3d311SJakub Kicinski enum nfp_relo_type relo) 63577a3d311SJakub Kicinski { 63677a3d311SJakub Kicinski if (imm > 0xffff) { 63777a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 63877a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 63977a3d311SJakub Kicinski return; 64077a3d311SJakub Kicinski } 64177a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 64277a3d311SJakub Kicinski 64377a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 64477a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 64577a3d311SJakub Kicinski } 64677a3d311SJakub Kicinski 647d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 648d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 649d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 650d9ae7f2bSJakub Kicinski */ 651b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 652d9ae7f2bSJakub Kicinski { 653d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 654d9ae7f2bSJakub Kicinski return reg_imm(imm); 655d9ae7f2bSJakub Kicinski 656d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 657d9ae7f2bSJakub Kicinski return tmp_reg; 658d9ae7f2bSJakub Kicinski } 659d9ae7f2bSJakub Kicinski 660d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 661d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 662d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 663d9ae7f2bSJakub Kicinski */ 664b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 665d9ae7f2bSJakub Kicinski { 666d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 667d9ae7f2bSJakub Kicinski return reg_imm(imm); 668d9ae7f2bSJakub Kicinski 669d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 670d9ae7f2bSJakub Kicinski return tmp_reg; 671d9ae7f2bSJakub Kicinski } 672d9ae7f2bSJakub Kicinski 673ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 674ff42bb9fSJakub Kicinski { 675ff42bb9fSJakub Kicinski while (count--) 676ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 677ff42bb9fSJakub Kicinski } 678ff42bb9fSJakub Kicinski 679c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 680c000dfb5SJakub Kicinski { 681c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 682c000dfb5SJakub Kicinski } 683c000dfb5SJakub Kicinski 684d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 685d9ae7f2bSJakub Kicinski { 686c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 687d9ae7f2bSJakub Kicinski } 688d9ae7f2bSJakub Kicinski 6899879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 6909879a381SJiong Wang * result to @dst from low end. 6919879a381SJiong Wang */ 6929879a381SJiong Wang static void 6939879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 6949879a381SJiong Wang u8 offset) 6959879a381SJiong Wang { 6969879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 6979879a381SJiong Wang u8 mask = (1 << field_len) - 1; 6989879a381SJiong Wang 6999879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 7009879a381SJiong Wang } 7019879a381SJiong Wang 70291ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 70391ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 70491ff69e8SJiong Wang */ 70591ff69e8SJiong Wang static void 70691ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 70791ff69e8SJiong Wang u8 field_len, u8 offset) 70891ff69e8SJiong Wang { 70991ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 71091ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 71191ff69e8SJiong Wang 71291ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 71391ff69e8SJiong Wang } 71491ff69e8SJiong Wang 7153dd43c33SJakub Kicinski static void 7163dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7173dd43c33SJakub Kicinski swreg *rega, swreg *regb) 7183dd43c33SJakub Kicinski { 7193dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 7203dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 7213dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 7223dd43c33SJakub Kicinski return; 7233dd43c33SJakub Kicinski } 7243dd43c33SJakub Kicinski 7253dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 7263dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 7273dd43c33SJakub Kicinski reg_imm(0)); 7283dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 7293dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 7303dd43c33SJakub Kicinski } 7313dd43c33SJakub Kicinski 7329879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 7339879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 7349879a381SJiong Wang { 7359879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 7369879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 7379879a381SJiong Wang swreg src_base, off; 7383dd43c33SJakub Kicinski bool src_40bit_addr; 7399879a381SJiong Wang unsigned int i; 7409879a381SJiong Wang u8 xfer_num; 7419879a381SJiong Wang 7429879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 7433dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 7449879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 7459879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 7469879a381SJiong Wang 7473dd43c33SJakub Kicinski if (src_40bit_addr) 748cc0dff6dSJiong Wang addr40_offset(nfp_prog, meta->insn.src_reg * 2, off, &src_base, 7493dd43c33SJakub Kicinski &off); 7503dd43c33SJakub Kicinski 7518c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 7528c900538SJiong Wang if (len > 32) 7538c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7548c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7558c900538SJiong Wang 7569879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 7573dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 7583dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 759b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 7609879a381SJiong Wang 7619879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 7629879a381SJiong Wang for (i = 0; i < xfer_num; i++) 7639879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 7649879a381SJiong Wang 7659879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 7669879a381SJiong Wang 7679879a381SJiong Wang if (len <= 8) { 7689879a381SJiong Wang /* Use single direct_ref write8. */ 7699879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7709879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 771b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7728c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 7739879a381SJiong Wang /* Use single direct_ref write32. */ 7749879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7759879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 776b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7778c900538SJiong Wang } else if (len <= 32) { 7789879a381SJiong Wang /* Use single indirect_ref write8. */ 7799879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 7809879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 7819879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7829879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 783b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 7848c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 7858c900538SJiong Wang /* Use single indirect_ref write32. */ 7868c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7878c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7888c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7898c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 790b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 7918c900538SJiong Wang } else if (len <= 40) { 7928c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 7938c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 7948c900538SJiong Wang */ 7958c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7968c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 797b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7988c900538SJiong Wang 7998c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 8008c900538SJiong Wang imm_b(nfp_prog)); 8018c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 8028c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 803b556ddd9SJakub Kicinski CMD_CTX_SWAP); 8048c900538SJiong Wang } else { 8058c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 8068c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 8078c900538SJiong Wang */ 8088c900538SJiong Wang u8 new_off; 8098c900538SJiong Wang 8108c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 8118c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 8128c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 8138c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 814b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 8158c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 8168c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 8178c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8188c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 819b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 8209879a381SJiong Wang } 8219879a381SJiong Wang 8229879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 8239879a381SJiong Wang * before and after we do memory copy optimization. 8249879a381SJiong Wang * 8259879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 8269879a381SJiong Wang * need to make sure it is loaded with the value the same as before 8279879a381SJiong Wang * this transformation. 8289879a381SJiong Wang * 8299879a381SJiong Wang * These extra loads could be removed once we have accurate register 8309879a381SJiong Wang * usage information. 8319879a381SJiong Wang */ 8329879a381SJiong Wang if (descending_seq) 8339879a381SJiong Wang xfer_num = 0; 8349879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 8359879a381SJiong Wang xfer_num = xfer_num - 1; 8369879a381SJiong Wang else 8379879a381SJiong Wang xfer_num = xfer_num - 2; 8389879a381SJiong Wang 8399879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 8409879a381SJiong Wang case BPF_B: 8419879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8429879a381SJiong Wang reg_xfer(xfer_num), 1, 8439879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 8449879a381SJiong Wang break; 8459879a381SJiong Wang case BPF_H: 8469879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8479879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 8489879a381SJiong Wang break; 8499879a381SJiong Wang case BPF_W: 8509879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8519879a381SJiong Wang reg_xfer(0)); 8529879a381SJiong Wang break; 8539879a381SJiong Wang case BPF_DW: 8549879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8559879a381SJiong Wang reg_xfer(xfer_num)); 8569879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 8579879a381SJiong Wang reg_xfer(xfer_num + 1)); 8589879a381SJiong Wang break; 8599879a381SJiong Wang } 8609879a381SJiong Wang 8619879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 8629879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 8639879a381SJiong Wang 8649879a381SJiong Wang return 0; 8659879a381SJiong Wang } 8669879a381SJiong Wang 867d9ae7f2bSJakub Kicinski static int 8680b4de1ffSJiong Wang data_ld(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, swreg offset, 8690b4de1ffSJiong Wang u8 dst_gpr, int size) 870d9ae7f2bSJakub Kicinski { 871d9ae7f2bSJakub Kicinski unsigned int i; 872d9ae7f2bSJakub Kicinski u16 shift, sz; 873d9ae7f2bSJakub Kicinski 874d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 875d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 876d9ae7f2bSJakub Kicinski */ 8770a793977SJakub Kicinski sz = max(size, 4); 878d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 879d9ae7f2bSJakub Kicinski 8800a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 881b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 8820a793977SJakub Kicinski 8830a793977SJakub Kicinski i = 0; 8840a793977SJakub Kicinski if (shift) 8850a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 8860a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 8870a793977SJakub Kicinski else 8880a793977SJakub Kicinski for (; i * 4 < size; i++) 8890a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8900a793977SJakub Kicinski 8910a793977SJakub Kicinski if (i < 2) 8920b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst_gpr); 8930a793977SJakub Kicinski 8940a793977SJakub Kicinski return 0; 8950a793977SJakub Kicinski } 8960a793977SJakub Kicinski 8970a793977SJakub Kicinski static int 8980b4de1ffSJiong Wang data_ld_host_order(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 8990b4de1ffSJiong Wang u8 dst_gpr, swreg lreg, swreg rreg, int size, 9000b4de1ffSJiong Wang enum cmd_mode mode) 9012ca71441SJakub Kicinski { 9022ca71441SJakub Kicinski unsigned int i; 9032ca71441SJakub Kicinski u8 mask, sz; 9042ca71441SJakub Kicinski 9053dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 9062ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 9072ca71441SJakub Kicinski */ 9082ca71441SJakub Kicinski sz = max(size, 4); 9092ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 9102ca71441SJakub Kicinski 9113dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 912b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 9132ca71441SJakub Kicinski 9142ca71441SJakub Kicinski i = 0; 9152ca71441SJakub Kicinski if (mask) 9162ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 9172ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 9182ca71441SJakub Kicinski else 9192ca71441SJakub Kicinski for (; i * 4 < size; i++) 9202ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 9212ca71441SJakub Kicinski 9222ca71441SJakub Kicinski if (i < 2) 9230b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst_gpr); 9242ca71441SJakub Kicinski 9252ca71441SJakub Kicinski return 0; 9262ca71441SJakub Kicinski } 9272ca71441SJakub Kicinski 9282ca71441SJakub Kicinski static int 9290b4de1ffSJiong Wang data_ld_host_order_addr32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 9300b4de1ffSJiong Wang u8 src_gpr, swreg offset, u8 dst_gpr, u8 size) 9313dd43c33SJakub Kicinski { 9320b4de1ffSJiong Wang return data_ld_host_order(nfp_prog, meta, dst_gpr, reg_a(src_gpr), 9330b4de1ffSJiong Wang offset, size, CMD_MODE_32b); 9343dd43c33SJakub Kicinski } 9353dd43c33SJakub Kicinski 9363dd43c33SJakub Kicinski static int 9370b4de1ffSJiong Wang data_ld_host_order_addr40(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 9380b4de1ffSJiong Wang u8 src_gpr, swreg offset, u8 dst_gpr, u8 size) 9393dd43c33SJakub Kicinski { 9403dd43c33SJakub Kicinski swreg rega, regb; 9413dd43c33SJakub Kicinski 9423dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 9433dd43c33SJakub Kicinski 9440b4de1ffSJiong Wang return data_ld_host_order(nfp_prog, meta, dst_gpr, rega, regb, 9453dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 9463dd43c33SJakub Kicinski } 9473dd43c33SJakub Kicinski 9483dd43c33SJakub Kicinski static int 9490b4de1ffSJiong Wang construct_data_ind_ld(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 9500b4de1ffSJiong Wang u16 offset, u16 src, u8 size) 9510a793977SJakub Kicinski { 9520a793977SJakub Kicinski swreg tmp_reg; 9530a793977SJakub Kicinski 954d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 955d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9560a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 9570a793977SJakub Kicinski 958d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 959d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 960d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 961d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 96218e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 963e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9640a793977SJakub Kicinski 965d9ae7f2bSJakub Kicinski /* Load data */ 9660b4de1ffSJiong Wang return data_ld(nfp_prog, meta, imm_b(nfp_prog), 0, size); 967d9ae7f2bSJakub Kicinski } 968d9ae7f2bSJakub Kicinski 9690b4de1ffSJiong Wang static int 9700b4de1ffSJiong Wang construct_data_ld(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 9710b4de1ffSJiong Wang u16 offset, u8 size) 972d9ae7f2bSJakub Kicinski { 9730a793977SJakub Kicinski swreg tmp_reg; 9740a793977SJakub Kicinski 9750a793977SJakub Kicinski /* Check packet length */ 9760a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 9770a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 978e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9790a793977SJakub Kicinski 9800a793977SJakub Kicinski /* Load data */ 9810a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9820b4de1ffSJiong Wang return data_ld(nfp_prog, meta, tmp_reg, 0, size); 983d9ae7f2bSJakub Kicinski } 984d9ae7f2bSJakub Kicinski 985e663fe38SJakub Kicinski static int 986e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 987e663fe38SJakub Kicinski u8 src_gpr, u8 size) 988e663fe38SJakub Kicinski { 989e663fe38SJakub Kicinski unsigned int i; 990e663fe38SJakub Kicinski 991e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 992e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 993e663fe38SJakub Kicinski 994e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 995b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 996e663fe38SJakub Kicinski 997e663fe38SJakub Kicinski return 0; 998e663fe38SJakub Kicinski } 999e663fe38SJakub Kicinski 1000e663fe38SJakub Kicinski static int 1001e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 1002e663fe38SJakub Kicinski u64 imm, u8 size) 1003e663fe38SJakub Kicinski { 1004e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 1005e663fe38SJakub Kicinski if (size == 8) 1006e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 1007e663fe38SJakub Kicinski 1008e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 1009b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 1010e663fe38SJakub Kicinski 1011e663fe38SJakub Kicinski return 0; 1012e663fe38SJakub Kicinski } 1013e663fe38SJakub Kicinski 1014ee9133a8SJakub Kicinski typedef int 1015ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 10162df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10172df03a50SJakub Kicinski bool needs_inc); 1018a82b23fbSJakub Kicinski 1019a82b23fbSJakub Kicinski static int 1020a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 10212df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10222df03a50SJakub Kicinski bool needs_inc) 1023a82b23fbSJakub Kicinski { 10242df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1025a82b23fbSJakub Kicinski u32 idx, src_byte; 1026a82b23fbSJakub Kicinski enum shf_sc sc; 1027a82b23fbSJakub Kicinski swreg reg; 1028a82b23fbSJakub Kicinski int shf; 1029a82b23fbSJakub Kicinski u8 mask; 1030a82b23fbSJakub Kicinski 1031a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 1032a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1033a82b23fbSJakub Kicinski 1034a82b23fbSJakub Kicinski idx = off / 4; 1035a82b23fbSJakub Kicinski 1036a82b23fbSJakub Kicinski /* Move the entire word */ 1037a82b23fbSJakub Kicinski if (size == 4) { 10382df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 10392df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 1040a82b23fbSJakub Kicinski return 0; 1041a82b23fbSJakub Kicinski } 1042a82b23fbSJakub Kicinski 10432df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 10442df03a50SJakub Kicinski return -EOPNOTSUPP; 10452df03a50SJakub Kicinski 1046a82b23fbSJakub Kicinski src_byte = off % 4; 1047a82b23fbSJakub Kicinski 1048a82b23fbSJakub Kicinski mask = (1 << size) - 1; 1049a82b23fbSJakub Kicinski mask <<= dst_byte; 1050a82b23fbSJakub Kicinski 1051a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1052a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1053a82b23fbSJakub Kicinski 1054a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1055a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 1056a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 1057a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 1058a82b23fbSJakub Kicinski shf = 32 - shf; 1059a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 1060a82b23fbSJakub Kicinski } else { 1061a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 1062a82b23fbSJakub Kicinski } 1063a82b23fbSJakub Kicinski 1064a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1065a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1066a82b23fbSJakub Kicinski */ 1067a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 10682df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1069a82b23fbSJakub Kicinski } else { 1070a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 10719a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 10729a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 10739a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 10749a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 10759a90c83cSJakub Kicinski */ 10769a90c83cSJakub Kicinski if (first || !new_gpr) 1077a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1078a82b23fbSJakub Kicinski } 1079a82b23fbSJakub Kicinski 1080a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 1081a82b23fbSJakub Kicinski 10822df03a50SJakub Kicinski if (should_inc) 10832df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10842df03a50SJakub Kicinski 1085a82b23fbSJakub Kicinski return 0; 1086a82b23fbSJakub Kicinski } 1087ee9133a8SJakub Kicinski 1088ee9133a8SJakub Kicinski static int 1089ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 10902df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10912df03a50SJakub Kicinski bool needs_inc) 1092ee9133a8SJakub Kicinski { 10932df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1094ee9133a8SJakub Kicinski u32 idx, dst_byte; 1095ee9133a8SJakub Kicinski enum shf_sc sc; 1096ee9133a8SJakub Kicinski swreg reg; 1097ee9133a8SJakub Kicinski int shf; 1098ee9133a8SJakub Kicinski u8 mask; 1099ee9133a8SJakub Kicinski 1100ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 1101ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1102ee9133a8SJakub Kicinski 1103ee9133a8SJakub Kicinski idx = off / 4; 1104ee9133a8SJakub Kicinski 1105ee9133a8SJakub Kicinski /* Move the entire word */ 1106ee9133a8SJakub Kicinski if (size == 4) { 11072df03a50SJakub Kicinski wrp_mov(nfp_prog, 11082df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 11092df03a50SJakub Kicinski reg_b(src)); 1110ee9133a8SJakub Kicinski return 0; 1111ee9133a8SJakub Kicinski } 1112ee9133a8SJakub Kicinski 11132df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 11142df03a50SJakub Kicinski return -EOPNOTSUPP; 11152df03a50SJakub Kicinski 1116ee9133a8SJakub Kicinski dst_byte = off % 4; 1117ee9133a8SJakub Kicinski 1118ee9133a8SJakub Kicinski mask = (1 << size) - 1; 1119ee9133a8SJakub Kicinski mask <<= dst_byte; 1120ee9133a8SJakub Kicinski 1121ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1122ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1123ee9133a8SJakub Kicinski 1124ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1125ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 1126ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 1127ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 1128ee9133a8SJakub Kicinski shf = 32 - shf; 1129ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 1130ee9133a8SJakub Kicinski } else { 1131ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 1132ee9133a8SJakub Kicinski } 1133ee9133a8SJakub Kicinski 1134ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1135ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1136ee9133a8SJakub Kicinski */ 1137ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 11382df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1139ee9133a8SJakub Kicinski } else { 1140ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 11419a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 11429a90c83cSJakub Kicinski * the middle location will be overwritten fully. 11439a90c83cSJakub Kicinski */ 11449a90c83cSJakub Kicinski if (first || last) 1145ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1146ee9133a8SJakub Kicinski } 1147ee9133a8SJakub Kicinski 1148ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 1149ee9133a8SJakub Kicinski 11509a90c83cSJakub Kicinski if (new_gpr || last) { 1151ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1152ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 11532df03a50SJakub Kicinski if (should_inc) 11542df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 11559a90c83cSJakub Kicinski } 1156ee9133a8SJakub Kicinski 1157ee9133a8SJakub Kicinski return 0; 1158ee9133a8SJakub Kicinski } 1159ee9133a8SJakub Kicinski 1160ee9133a8SJakub Kicinski static int 1161ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1162b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1163b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1164ee9133a8SJakub Kicinski { 11651a7e62e6SQuentin Monnet s32 off = nfp_prog->stack_frame_depth + meta->insn.off + ptr_off; 116686c28b2dSJiong Wang bool first = true, narrow_ld, last; 11672df03a50SJakub Kicinski bool needs_inc = false; 11682df03a50SJakub Kicinski swreg stack_off_reg; 1169a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1170ee9133a8SJakub Kicinski u32 gpr_byte = 0; 11712df03a50SJakub Kicinski bool lm3 = true; 1172ee9133a8SJakub Kicinski int ret; 1173ee9133a8SJakub Kicinski 11747ff0ccdeSQuentin Monnet if (meta->ptr_not_const || 11757ff0ccdeSQuentin Monnet meta->flags & FLAG_INSN_PTR_CALLER_STACK_FRAME) { 1176b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1177b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1178b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1179b14157eeSJakub Kicinski */ 1180b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1181b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1182b14157eeSJakub Kicinski 1183b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1184b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1185b14157eeSJakub Kicinski 1186b14157eeSJakub Kicinski needs_inc = true; 1187b14157eeSJakub Kicinski } else if (off + size <= 64) { 11882df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 11892df03a50SJakub Kicinski lm3 = false; 11902df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 11912df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 11922df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 11932df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 11942df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 11952df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 11962df03a50SJakub Kicinski */ 11972df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 11982df03a50SJakub Kicinski stack_imm(nfp_prog)); 11992df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 12002df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 12012df03a50SJakub Kicinski 12022df03a50SJakub Kicinski off %= 32; 12032df03a50SJakub Kicinski } else { 12042df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 12052df03a50SJakub Kicinski stack_imm(nfp_prog)); 12062df03a50SJakub Kicinski 12072df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 12082df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 12092df03a50SJakub Kicinski 12102df03a50SJakub Kicinski needs_inc = true; 12112df03a50SJakub Kicinski } 121286c28b2dSJiong Wang 121386c28b2dSJiong Wang narrow_ld = clr_gpr && size < 8; 121486c28b2dSJiong Wang 12152df03a50SJakub Kicinski if (lm3) { 121686c28b2dSJiong Wang unsigned int nop_cnt; 121786c28b2dSJiong Wang 12182df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 121986c28b2dSJiong Wang /* For size < 4 one slot will be filled by zeroing of upper, 122086c28b2dSJiong Wang * but be careful, that zeroing could be eliminated by zext 122186c28b2dSJiong Wang * optimization. 122286c28b2dSJiong Wang */ 122386c28b2dSJiong Wang nop_cnt = narrow_ld && meta->flags & FLAG_INSN_DO_ZEXT ? 2 : 3; 122486c28b2dSJiong Wang wrp_nops(nfp_prog, nop_cnt); 12252df03a50SJakub Kicinski } 12262df03a50SJakub Kicinski 122786c28b2dSJiong Wang if (narrow_ld) 12280b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, gpr); 1229a82b23fbSJakub Kicinski 1230ee9133a8SJakub Kicinski while (size) { 1231ee9133a8SJakub Kicinski u32 slice_end; 1232ee9133a8SJakub Kicinski u8 slice_size; 1233ee9133a8SJakub Kicinski 1234ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1235ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1236ee9133a8SJakub Kicinski slice_size = slice_end - off; 1237ee9133a8SJakub Kicinski 12389a90c83cSJakub Kicinski last = slice_size == size; 12399a90c83cSJakub Kicinski 12402df03a50SJakub Kicinski if (needs_inc) 12412df03a50SJakub Kicinski off %= 4; 12422df03a50SJakub Kicinski 1243a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 12442df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1245ee9133a8SJakub Kicinski if (ret) 1246ee9133a8SJakub Kicinski return ret; 1247ee9133a8SJakub Kicinski 1248a82b23fbSJakub Kicinski prev_gpr = gpr; 12499a90c83cSJakub Kicinski first = false; 12509a90c83cSJakub Kicinski 1251ee9133a8SJakub Kicinski gpr_byte += slice_size; 1252ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1253ee9133a8SJakub Kicinski gpr_byte -= 4; 1254ee9133a8SJakub Kicinski gpr++; 1255ee9133a8SJakub Kicinski } 1256ee9133a8SJakub Kicinski 1257ee9133a8SJakub Kicinski size -= slice_size; 1258ee9133a8SJakub Kicinski off += slice_size; 1259ee9133a8SJakub Kicinski } 1260ee9133a8SJakub Kicinski 1261ee9133a8SJakub Kicinski return 0; 1262ee9133a8SJakub Kicinski } 1263ee9133a8SJakub Kicinski 1264d9ae7f2bSJakub Kicinski static void 1265d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1266d9ae7f2bSJakub Kicinski { 1267b3f868dfSJakub Kicinski swreg tmp_reg; 1268d9ae7f2bSJakub Kicinski 1269d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1270d9ae7f2bSJakub Kicinski if (!imm) 1271d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1272d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1273d9ae7f2bSJakub Kicinski return; 1274d9ae7f2bSJakub Kicinski } 1275d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1276d9ae7f2bSJakub Kicinski if (!~imm) 1277d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1278d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1279d9ae7f2bSJakub Kicinski return; 1280d9ae7f2bSJakub Kicinski } 1281d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1282d9ae7f2bSJakub Kicinski if (!~imm) 1283d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 12845d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1285d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1286d9ae7f2bSJakub Kicinski return; 1287d9ae7f2bSJakub Kicinski } 1288d9ae7f2bSJakub Kicinski 1289d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1290d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1291d9ae7f2bSJakub Kicinski } 1292d9ae7f2bSJakub Kicinski 1293d9ae7f2bSJakub Kicinski static int 1294d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1295d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1296d9ae7f2bSJakub Kicinski { 1297d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1298d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1299d9ae7f2bSJakub Kicinski 1300d9ae7f2bSJakub Kicinski if (skip) { 130191a87a58SJakub Kicinski meta->flags |= FLAG_INSN_SKIP_NOOP; 1302d9ae7f2bSJakub Kicinski return 0; 1303d9ae7f2bSJakub Kicinski } 1304d9ae7f2bSJakub Kicinski 1305d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1306d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1307d9ae7f2bSJakub Kicinski 1308d9ae7f2bSJakub Kicinski return 0; 1309d9ae7f2bSJakub Kicinski } 1310d9ae7f2bSJakub Kicinski 1311d9ae7f2bSJakub Kicinski static int 1312d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1313d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1314d9ae7f2bSJakub Kicinski { 1315d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1316d9ae7f2bSJakub Kicinski 1317d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1318d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1319d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1320d9ae7f2bSJakub Kicinski 1321d9ae7f2bSJakub Kicinski return 0; 1322d9ae7f2bSJakub Kicinski } 1323d9ae7f2bSJakub Kicinski 1324d9ae7f2bSJakub Kicinski static int 1325d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1326f036ebd9SJiong Wang enum alu_op alu_op) 1327d9ae7f2bSJakub Kicinski { 1328d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 13290b4de1ffSJiong Wang u8 dst = insn->dst_reg * 2; 1330d9ae7f2bSJakub Kicinski 13310b4de1ffSJiong Wang wrp_alu_imm(nfp_prog, dst, alu_op, insn->imm); 13320b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst); 1333d9ae7f2bSJakub Kicinski 1334d9ae7f2bSJakub Kicinski return 0; 1335d9ae7f2bSJakub Kicinski } 1336d9ae7f2bSJakub Kicinski 1337d9ae7f2bSJakub Kicinski static int 1338d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1339d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1340d9ae7f2bSJakub Kicinski { 1341d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1342d9ae7f2bSJakub Kicinski 1343d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 13440b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst); 1345d9ae7f2bSJakub Kicinski 1346d9ae7f2bSJakub Kicinski return 0; 1347d9ae7f2bSJakub Kicinski } 1348d9ae7f2bSJakub Kicinski 1349d9ae7f2bSJakub Kicinski static void 1350d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1351d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1352d9ae7f2bSJakub Kicinski { 1353d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1354d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1355d9ae7f2bSJakub Kicinski } 1356d9ae7f2bSJakub Kicinski 1357d9ae7f2bSJakub Kicinski static int 1358d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1359d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1360d9ae7f2bSJakub Kicinski { 1361d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1362d9ae7f2bSJakub Kicinski 1363d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1364d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 136546144839SJiong Wang if (is_mbpf_jmp64(meta)) 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 142246144839SJiong Wang if (is_mbpf_jmp64(meta)) { 1423d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 142461dd8f00SJakub Kicinski if (!code->swap) 1425d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 14267bdc97beSJakub Kicinski reg_a(reg + 1), carry_op, tmp_reg); 1427d9ae7f2bSJakub Kicinski else 1428d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 14297bdc97beSJakub Kicinski tmp_reg, carry_op, reg_a(reg + 1)); 143046144839SJiong Wang } 1431d9ae7f2bSJakub Kicinski 143261dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1433d9ae7f2bSJakub Kicinski 1434d9ae7f2bSJakub Kicinski return 0; 1435d9ae7f2bSJakub Kicinski } 1436d9ae7f2bSJakub Kicinski 143761dd8f00SJakub Kicinski static int cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1438d9ae7f2bSJakub Kicinski { 1439d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 144061dd8f00SJakub Kicinski const struct jmp_code_map *code; 144126fa818dSJakub Kicinski u8 areg, breg; 144226fa818dSJakub Kicinski 144361dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 144461dd8f00SJakub Kicinski if (!code) 144561dd8f00SJakub Kicinski return -EINVAL; 144661dd8f00SJakub Kicinski 144726fa818dSJakub Kicinski areg = insn->dst_reg * 2; 144826fa818dSJakub Kicinski breg = insn->src_reg * 2; 1449d9ae7f2bSJakub Kicinski 145061dd8f00SJakub Kicinski if (code->swap) { 1451d9ae7f2bSJakub Kicinski areg ^= breg; 1452d9ae7f2bSJakub Kicinski breg ^= areg; 1453d9ae7f2bSJakub Kicinski areg ^= breg; 1454d9ae7f2bSJakub Kicinski } 1455d9ae7f2bSJakub Kicinski 1456d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 145746144839SJiong Wang if (is_mbpf_jmp64(meta)) 1458d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1459d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 146061dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1461d9ae7f2bSJakub Kicinski 1462d9ae7f2bSJakub Kicinski return 0; 1463d9ae7f2bSJakub Kicinski } 1464d9ae7f2bSJakub Kicinski 14653119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 14663119d1fdSJakub Kicinski { 14673119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 14683119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 14693119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 14703119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 14713119d1fdSJakub Kicinski } 14723119d1fdSJakub Kicinski 1473d3d23fdbSJiong Wang static void 1474d3d23fdbSJiong Wang wrp_mul_u32(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1475d3d23fdbSJiong Wang swreg rreg, bool gen_high_half) 1476d3d23fdbSJiong Wang { 1477d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1478d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_1, rreg); 1479d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_2, rreg); 1480d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_3, rreg); 1481d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_4, rreg); 1482d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_32x32, MUL_LAST, reg_none()); 1483d3d23fdbSJiong Wang if (gen_high_half) 1484d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_hi, MUL_TYPE_STEP_32x32, MUL_LAST_2, 1485d3d23fdbSJiong Wang reg_none()); 1486d3d23fdbSJiong Wang else 1487d3d23fdbSJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1488d3d23fdbSJiong Wang } 1489d3d23fdbSJiong Wang 1490d3d23fdbSJiong Wang static void 1491d3d23fdbSJiong Wang wrp_mul_u16(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1492d3d23fdbSJiong Wang swreg rreg) 1493d3d23fdbSJiong Wang { 1494d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1495d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_1, rreg); 1496d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_2, rreg); 1497d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_16x16, MUL_LAST, reg_none()); 1498d3d23fdbSJiong Wang } 1499d3d23fdbSJiong Wang 1500d3d23fdbSJiong Wang static int 1501d3d23fdbSJiong Wang wrp_mul(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1502d3d23fdbSJiong Wang bool gen_high_half, bool ropnd_from_reg) 1503d3d23fdbSJiong Wang { 1504d3d23fdbSJiong Wang swreg multiplier, multiplicand, dst_hi, dst_lo; 1505d3d23fdbSJiong Wang const struct bpf_insn *insn = &meta->insn; 1506d3d23fdbSJiong Wang u32 lopnd_max, ropnd_max; 1507d3d23fdbSJiong Wang u8 dst_reg; 1508d3d23fdbSJiong Wang 1509d3d23fdbSJiong Wang dst_reg = insn->dst_reg; 1510d3d23fdbSJiong Wang multiplicand = reg_a(dst_reg * 2); 1511d3d23fdbSJiong Wang dst_hi = reg_both(dst_reg * 2 + 1); 1512d3d23fdbSJiong Wang dst_lo = reg_both(dst_reg * 2); 1513d3d23fdbSJiong Wang lopnd_max = meta->umax_dst; 1514d3d23fdbSJiong Wang if (ropnd_from_reg) { 1515d3d23fdbSJiong Wang multiplier = reg_b(insn->src_reg * 2); 1516d3d23fdbSJiong Wang ropnd_max = meta->umax_src; 1517d3d23fdbSJiong Wang } else { 1518d3d23fdbSJiong Wang u32 imm = insn->imm; 1519d3d23fdbSJiong Wang 1520d3d23fdbSJiong Wang multiplier = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1521d3d23fdbSJiong Wang ropnd_max = imm; 1522d3d23fdbSJiong Wang } 1523d3d23fdbSJiong Wang if (lopnd_max > U16_MAX || ropnd_max > U16_MAX) 1524d3d23fdbSJiong Wang wrp_mul_u32(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier, 1525d3d23fdbSJiong Wang gen_high_half); 1526d3d23fdbSJiong Wang else 1527d3d23fdbSJiong Wang wrp_mul_u16(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier); 1528d3d23fdbSJiong Wang 1529d3d23fdbSJiong Wang return 0; 1530d3d23fdbSJiong Wang } 1531d3d23fdbSJiong Wang 15322a952b03SJiong Wang static int wrp_div_imm(struct nfp_prog *nfp_prog, u8 dst, u64 imm) 15332a952b03SJiong Wang { 15342a952b03SJiong Wang swreg dst_both = reg_both(dst), dst_a = reg_a(dst), dst_b = reg_a(dst); 15359fb410a8SJiong Wang struct reciprocal_value_adv rvalue; 15369fb410a8SJiong Wang u8 pre_shift, exp; 15372a952b03SJiong Wang swreg magic; 15382a952b03SJiong Wang 15392a952b03SJiong Wang if (imm > U32_MAX) { 15402a952b03SJiong Wang wrp_immed(nfp_prog, dst_both, 0); 15412a952b03SJiong Wang return 0; 15422a952b03SJiong Wang } 15432a952b03SJiong Wang 15449fb410a8SJiong Wang /* NOTE: because we are using "reciprocal_value_adv" which doesn't 15459fb410a8SJiong Wang * support "divisor > (1u << 31)", we need to JIT separate NFP sequence 15469fb410a8SJiong Wang * to handle such case which actually equals to the result of unsigned 15479fb410a8SJiong Wang * comparison "dst >= imm" which could be calculated using the following 15489fb410a8SJiong Wang * NFP sequence: 15499fb410a8SJiong Wang * 15509fb410a8SJiong Wang * alu[--, dst, -, imm] 15519fb410a8SJiong Wang * immed[imm, 0] 15529fb410a8SJiong Wang * alu[dst, imm, +carry, 0] 15539fb410a8SJiong Wang * 15549fb410a8SJiong Wang */ 15559fb410a8SJiong Wang if (imm > 1U << 31) { 15569fb410a8SJiong Wang swreg tmp_b = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 15579fb410a8SJiong Wang 15589fb410a8SJiong Wang emit_alu(nfp_prog, reg_none(), dst_a, ALU_OP_SUB, tmp_b); 15599fb410a8SJiong Wang wrp_immed(nfp_prog, imm_a(nfp_prog), 0); 15609fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, imm_a(nfp_prog), ALU_OP_ADD_C, 15619fb410a8SJiong Wang reg_imm(0)); 15629fb410a8SJiong Wang return 0; 15639fb410a8SJiong Wang } 15649fb410a8SJiong Wang 15659fb410a8SJiong Wang rvalue = reciprocal_value_adv(imm, 32); 15669fb410a8SJiong Wang exp = rvalue.exp; 15679fb410a8SJiong Wang if (rvalue.is_wide_m && !(imm & 1)) { 15689fb410a8SJiong Wang pre_shift = fls(imm & -imm) - 1; 15699fb410a8SJiong Wang rvalue = reciprocal_value_adv(imm >> pre_shift, 32 - pre_shift); 15709fb410a8SJiong Wang } else { 15719fb410a8SJiong Wang pre_shift = 0; 15729fb410a8SJiong Wang } 15732a952b03SJiong Wang magic = ur_load_imm_any(nfp_prog, rvalue.m, imm_b(nfp_prog)); 15749fb410a8SJiong Wang if (imm == 1U << exp) { 15752a952b03SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15769fb410a8SJiong Wang SHF_SC_R_SHF, exp); 15779fb410a8SJiong Wang } else if (rvalue.is_wide_m) { 15789fb410a8SJiong Wang wrp_mul_u32(nfp_prog, imm_both(nfp_prog), reg_none(), dst_a, 15799fb410a8SJiong Wang magic, true); 15809fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, dst_a, ALU_OP_SUB, 15819fb410a8SJiong Wang imm_b(nfp_prog)); 15822a952b03SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15839fb410a8SJiong Wang SHF_SC_R_SHF, 1); 15849fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, dst_a, ALU_OP_ADD, 15859fb410a8SJiong Wang imm_b(nfp_prog)); 15869fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15879fb410a8SJiong Wang SHF_SC_R_SHF, rvalue.sh - 1); 15889fb410a8SJiong Wang } else { 15899fb410a8SJiong Wang if (pre_shift) 15909fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, 15919fb410a8SJiong Wang dst_b, SHF_SC_R_SHF, pre_shift); 15929fb410a8SJiong Wang wrp_mul_u32(nfp_prog, dst_both, reg_none(), dst_a, magic, true); 15939fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, 15949fb410a8SJiong Wang dst_b, SHF_SC_R_SHF, rvalue.sh); 15959fb410a8SJiong Wang } 15962a952b03SJiong Wang 15972a952b03SJiong Wang return 0; 15982a952b03SJiong Wang } 15992a952b03SJiong Wang 16000d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16010d49eaf4SJakub Kicinski { 16020d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 16030d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 16040d49eaf4SJakub Kicinski u32 ret_einval, end; 16050d49eaf4SJakub Kicinski 16060d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 16070d49eaf4SJakub Kicinski 16088231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 16098231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 16108231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 16118231f844SJakub Kicinski return -EINVAL; 16128231f844SJakub Kicinski 16138231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 16148231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 16158231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 16168231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16178231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 16188231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16198231f844SJakub Kicinski 16208231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 16218231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 16228231f844SJakub Kicinski 16238231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 16248231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 16258231f844SJakub Kicinski */ 16268231f844SJakub Kicinski 16278231f844SJakub Kicinski return 0; 16288231f844SJakub Kicinski } 16298231f844SJakub Kicinski 16300d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 16310d49eaf4SJakub Kicinski end = ret_einval + 2; 16320d49eaf4SJakub Kicinski 16330d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 16340d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 16350d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 16360d49eaf4SJakub Kicinski 16370d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 16380d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16390d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 16400d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 16410d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16420d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 16430d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 16440d49eaf4SJakub Kicinski 16450d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 16460d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 16470d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16480d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16490d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 16500d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 16510d49eaf4SJakub Kicinski 16520d49eaf4SJakub Kicinski /* Load the ret code */ 16530d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 16540d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 16550d49eaf4SJakub Kicinski 16560d49eaf4SJakub Kicinski /* Modify the packet metadata */ 16570d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 16580d49eaf4SJakub Kicinski 16590d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 16602314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 16610d49eaf4SJakub Kicinski 16620d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 16630d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16640d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 16650d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16660d49eaf4SJakub Kicinski 16670d49eaf4SJakub Kicinski /* return -EINVAL target */ 16680d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 16690d49eaf4SJakub Kicinski return -EINVAL; 16700d49eaf4SJakub Kicinski 16710d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 16720d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 16730d49eaf4SJakub Kicinski 16740d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 16750d49eaf4SJakub Kicinski return -EINVAL; 16760d49eaf4SJakub Kicinski 16770d49eaf4SJakub Kicinski return 0; 16780d49eaf4SJakub Kicinski } 16790d49eaf4SJakub Kicinski 16800c261593SJakub Kicinski static int adjust_tail(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16810c261593SJakub Kicinski { 16820c261593SJakub Kicinski u32 ret_einval, end; 16830c261593SJakub Kicinski swreg plen, delta; 16840c261593SJakub Kicinski 16850c261593SJakub Kicinski BUILD_BUG_ON(plen_reg(nfp_prog) != reg_b(STATIC_REG_PKT_LEN)); 16860c261593SJakub Kicinski 16870c261593SJakub Kicinski plen = imm_a(nfp_prog); 16880c261593SJakub Kicinski delta = reg_a(2 * 2); 16890c261593SJakub Kicinski 16900c261593SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 9; 16910c261593SJakub Kicinski end = nfp_prog_current_offset(nfp_prog) + 11; 16920c261593SJakub Kicinski 16930c261593SJakub Kicinski /* Calculate resulting length */ 16940c261593SJakub Kicinski emit_alu(nfp_prog, plen, plen_reg(nfp_prog), ALU_OP_ADD, delta); 16950c261593SJakub Kicinski /* delta == 0 is not allowed by the kernel, add must overflow to make 16960c261593SJakub Kicinski * length smaller. 16970c261593SJakub Kicinski */ 16980c261593SJakub Kicinski emit_br(nfp_prog, BR_BCC, ret_einval, 0); 16990c261593SJakub Kicinski 17000c261593SJakub Kicinski /* if (new_len < 14) then -EINVAL */ 17010c261593SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen, ALU_OP_SUB, reg_imm(ETH_HLEN)); 17020c261593SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 17030c261593SJakub Kicinski 17040c261593SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 17050c261593SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, delta); 17060c261593SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 17070c261593SJakub Kicinski pv_len(nfp_prog), ALU_OP_ADD, delta); 17080c261593SJakub Kicinski 17090c261593SJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 17100c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 17110c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 17120c261593SJakub Kicinski 17130c261593SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 17140c261593SJakub Kicinski return -EINVAL; 17150c261593SJakub Kicinski 17160c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 17170c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 17180c261593SJakub Kicinski 17190c261593SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 17200c261593SJakub Kicinski return -EINVAL; 17210c261593SJakub Kicinski 17220c261593SJakub Kicinski return 0; 17230c261593SJakub Kicinski } 17240c261593SJakub Kicinski 172577a3d311SJakub Kicinski static int 1726fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 172777a3d311SJakub Kicinski { 172877a3d311SJakub Kicinski bool load_lm_ptr; 172977a3d311SJakub Kicinski u32 ret_tgt; 173077a3d311SJakub Kicinski s64 lm_off; 173177a3d311SJakub Kicinski 173277a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 17331a7e62e6SQuentin Monnet lm_off = nfp_prog->stack_frame_depth; 17342f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 17352f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 173677a3d311SJakub Kicinski 173777a3d311SJakub Kicinski /* Set LM0 to start of key */ 173877a3d311SJakub Kicinski if (load_lm_ptr) 173977a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 174044d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 174144d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 174277a3d311SJakub Kicinski 1743fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 174477a3d311SJakub Kicinski 2, RELO_BR_HELPER); 174577a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 174677a3d311SJakub Kicinski 174777a3d311SJakub Kicinski /* Load map ID into A0 */ 1748b4264c96SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), reg_a(2)); 174977a3d311SJakub Kicinski 175077a3d311SJakub Kicinski /* Load the return address into B0 */ 175177a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 175277a3d311SJakub Kicinski 175377a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 175477a3d311SJakub Kicinski return -EINVAL; 175577a3d311SJakub Kicinski 175677a3d311SJakub Kicinski /* Reset the LM0 pointer */ 175777a3d311SJakub Kicinski if (!load_lm_ptr) 175877a3d311SJakub Kicinski return 0; 175977a3d311SJakub Kicinski 176077a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 176177a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 176277a3d311SJakub Kicinski 176377a3d311SJakub Kicinski return 0; 176477a3d311SJakub Kicinski } 176577a3d311SJakub Kicinski 1766df4a37d8SJakub Kicinski static int 1767df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1768df4a37d8SJakub Kicinski { 1769df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1770df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1771df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1772df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1773df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1774df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1775df4a37d8SJakub Kicinski return 0; 1776df4a37d8SJakub Kicinski } 1777df4a37d8SJakub Kicinski 17789816dd35SJakub Kicinski static int 17799816dd35SJakub Kicinski nfp_perf_event_output(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 17809816dd35SJakub Kicinski { 17819816dd35SJakub Kicinski swreg ptr_type; 17829816dd35SJakub Kicinski u32 ret_tgt; 17839816dd35SJakub Kicinski 17849816dd35SJakub Kicinski ptr_type = ur_load_imm_any(nfp_prog, meta->arg1.type, imm_a(nfp_prog)); 17859816dd35SJakub Kicinski 17869816dd35SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 17879816dd35SJakub Kicinski 17889816dd35SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 17899816dd35SJakub Kicinski 2, RELO_BR_HELPER); 17909816dd35SJakub Kicinski 17919816dd35SJakub Kicinski /* Load ptr type into A1 */ 17929816dd35SJakub Kicinski wrp_mov(nfp_prog, reg_a(1), ptr_type); 17939816dd35SJakub Kicinski 17949816dd35SJakub Kicinski /* Load the return address into B0 */ 17959816dd35SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 17969816dd35SJakub Kicinski 17979816dd35SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 17989816dd35SJakub Kicinski return -EINVAL; 17999816dd35SJakub Kicinski 18009816dd35SJakub Kicinski return 0; 18019816dd35SJakub Kicinski } 18029816dd35SJakub Kicinski 1803d985888fSJakub Kicinski static int 1804d985888fSJakub Kicinski nfp_queue_select(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1805d985888fSJakub Kicinski { 1806d985888fSJakub Kicinski u32 jmp_tgt; 1807d985888fSJakub Kicinski 1808d985888fSJakub Kicinski jmp_tgt = nfp_prog_current_offset(nfp_prog) + 5; 1809d985888fSJakub Kicinski 1810d985888fSJakub Kicinski /* Make sure the queue id fits into FW field */ 1811d985888fSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(meta->insn.src_reg * 2), 1812d985888fSJakub Kicinski ALU_OP_AND_NOT_B, reg_imm(0xff)); 1813d985888fSJakub Kicinski emit_br(nfp_prog, BR_BEQ, jmp_tgt, 2); 1814d985888fSJakub Kicinski 1815d985888fSJakub Kicinski /* Set the 'queue selected' bit and the queue value */ 1816d985888fSJakub Kicinski emit_shf(nfp_prog, pv_qsel_set(nfp_prog), 1817d985888fSJakub Kicinski pv_qsel_set(nfp_prog), SHF_OP_OR, reg_imm(1), 1818d985888fSJakub Kicinski SHF_SC_L_SHF, PKT_VEL_QSEL_SET_BIT); 1819d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1820d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_b(meta->insn.src_reg * 2), 1821d985888fSJakub Kicinski SHF_SC_NONE, 0); 1822d985888fSJakub Kicinski /* Delay slots end here, we will jump over next instruction if queue 1823d985888fSJakub Kicinski * value fits into the field. 1824d985888fSJakub Kicinski */ 1825d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1826d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_imm(NFP_NET_RXR_MAX), 1827d985888fSJakub Kicinski SHF_SC_NONE, 0); 1828d985888fSJakub Kicinski 1829d985888fSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, jmp_tgt)) 1830d985888fSJakub Kicinski return -EINVAL; 1831d985888fSJakub Kicinski 1832d985888fSJakub Kicinski return 0; 1833d985888fSJakub Kicinski } 1834d985888fSJakub Kicinski 1835d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1836d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1837d9ae7f2bSJakub Kicinski { 1838d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1839b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1840b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1841d9ae7f2bSJakub Kicinski 1842b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1843b14157eeSJakub Kicinski swreg stack_depth_reg; 1844b14157eeSJakub Kicinski 1845b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 18461a7e62e6SQuentin Monnet nfp_prog->stack_frame_depth, 1847b14157eeSJakub Kicinski stack_imm(nfp_prog)); 18481a7e62e6SQuentin Monnet emit_alu(nfp_prog, reg_both(dst), stack_reg(nfp_prog), 18491a7e62e6SQuentin Monnet ALU_OP_ADD, stack_depth_reg); 1850b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1851b14157eeSJakub Kicinski } else { 1852b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1853b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1854b14157eeSJakub Kicinski } 1855d9ae7f2bSJakub Kicinski 1856d9ae7f2bSJakub Kicinski return 0; 1857d9ae7f2bSJakub Kicinski } 1858d9ae7f2bSJakub Kicinski 1859d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1860d9ae7f2bSJakub Kicinski { 1861d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1862d9ae7f2bSJakub Kicinski 1863d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1864d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1865d9ae7f2bSJakub Kicinski 1866d9ae7f2bSJakub Kicinski return 0; 1867d9ae7f2bSJakub Kicinski } 1868d9ae7f2bSJakub Kicinski 1869d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1870d9ae7f2bSJakub Kicinski { 1871d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1872d9ae7f2bSJakub Kicinski } 1873d9ae7f2bSJakub Kicinski 1874d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1875d9ae7f2bSJakub Kicinski { 1876d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1877d9ae7f2bSJakub Kicinski } 1878d9ae7f2bSJakub Kicinski 1879d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1880d9ae7f2bSJakub Kicinski { 1881d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1882d9ae7f2bSJakub Kicinski } 1883d9ae7f2bSJakub Kicinski 1884d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1885d9ae7f2bSJakub Kicinski { 1886d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1887d9ae7f2bSJakub Kicinski } 1888d9ae7f2bSJakub Kicinski 1889d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1890d9ae7f2bSJakub Kicinski { 1891d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1892d9ae7f2bSJakub Kicinski } 1893d9ae7f2bSJakub Kicinski 1894d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1895d9ae7f2bSJakub Kicinski { 1896d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1897d9ae7f2bSJakub Kicinski } 1898d9ae7f2bSJakub Kicinski 1899d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1900d9ae7f2bSJakub Kicinski { 1901d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1902d9ae7f2bSJakub Kicinski 1903d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1904d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1905d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1906d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1907d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1908d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1909d9ae7f2bSJakub Kicinski 1910d9ae7f2bSJakub Kicinski return 0; 1911d9ae7f2bSJakub Kicinski } 1912d9ae7f2bSJakub Kicinski 1913d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1914d9ae7f2bSJakub Kicinski { 1915d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1916d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1917d9ae7f2bSJakub Kicinski 1918d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1919d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1920d9ae7f2bSJakub Kicinski 1921d9ae7f2bSJakub Kicinski return 0; 1922d9ae7f2bSJakub Kicinski } 1923d9ae7f2bSJakub Kicinski 1924d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1925d9ae7f2bSJakub Kicinski { 1926d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1927d9ae7f2bSJakub Kicinski 1928d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1929d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1930d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1931d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1932d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1933d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1934d9ae7f2bSJakub Kicinski 1935d9ae7f2bSJakub Kicinski return 0; 1936d9ae7f2bSJakub Kicinski } 1937d9ae7f2bSJakub Kicinski 1938d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1939d9ae7f2bSJakub Kicinski { 1940d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1941d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1942d9ae7f2bSJakub Kicinski 1943d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1944d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1945d9ae7f2bSJakub Kicinski 1946d9ae7f2bSJakub Kicinski return 0; 1947d9ae7f2bSJakub Kicinski } 1948d9ae7f2bSJakub Kicinski 1949d3d23fdbSJiong Wang static int mul_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1950d3d23fdbSJiong Wang { 1951d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, true); 1952d3d23fdbSJiong Wang } 1953d3d23fdbSJiong Wang 1954d3d23fdbSJiong Wang static int mul_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1955d3d23fdbSJiong Wang { 1956d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, false); 1957d3d23fdbSJiong Wang } 1958d3d23fdbSJiong Wang 19592a952b03SJiong Wang static int div_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19602a952b03SJiong Wang { 19612a952b03SJiong Wang const struct bpf_insn *insn = &meta->insn; 19622a952b03SJiong Wang 19632a952b03SJiong Wang return wrp_div_imm(nfp_prog, insn->dst_reg * 2, insn->imm); 19642a952b03SJiong Wang } 19652a952b03SJiong Wang 19662a952b03SJiong Wang static int div_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19672a952b03SJiong Wang { 19682a952b03SJiong Wang /* NOTE: verifier hook has rejected cases for which verifier doesn't 19692a952b03SJiong Wang * know whether the source operand is constant or not. 19702a952b03SJiong Wang */ 19712a952b03SJiong Wang return wrp_div_imm(nfp_prog, meta->insn.dst_reg * 2, meta->umin_src); 19722a952b03SJiong Wang } 19732a952b03SJiong Wang 1974254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1975254ef4d7SJiong Wang { 1976254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1977254ef4d7SJiong Wang 1978254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1979254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1980254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1981254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1982254ef4d7SJiong Wang 1983254ef4d7SJiong Wang return 0; 1984254ef4d7SJiong Wang } 1985254ef4d7SJiong Wang 1986991f5b36SJiong Wang /* Pseudo code: 1987991f5b36SJiong Wang * if shift_amt >= 32 1988991f5b36SJiong Wang * dst_high = dst_low << shift_amt[4:0] 1989991f5b36SJiong Wang * dst_low = 0; 1990991f5b36SJiong Wang * else 1991991f5b36SJiong Wang * dst_high = (dst_high, dst_low) >> (32 - shift_amt) 1992991f5b36SJiong Wang * dst_low = dst_low << shift_amt 1993991f5b36SJiong Wang * 1994991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1995991f5b36SJiong Wang */ 1996991f5b36SJiong Wang static int __shl_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1997991f5b36SJiong Wang { 1998db0a4b3bSJiong Wang if (!shift_amt) 1999db0a4b3bSJiong Wang return 0; 2000db0a4b3bSJiong Wang 2001991f5b36SJiong Wang if (shift_amt < 32) { 2002991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), 2003991f5b36SJiong Wang SHF_OP_NONE, reg_b(dst), SHF_SC_R_DSHF, 2004991f5b36SJiong Wang 32 - shift_amt); 2005991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2006991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 2007991f5b36SJiong Wang } else if (shift_amt == 32) { 2008991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst + 1, dst); 2009991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 2010991f5b36SJiong Wang } else if (shift_amt > 32) { 2011991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2012991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt - 32); 2013991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 2014991f5b36SJiong Wang } 2015991f5b36SJiong Wang 2016991f5b36SJiong Wang return 0; 2017991f5b36SJiong Wang } 2018991f5b36SJiong Wang 2019d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2020d9ae7f2bSJakub Kicinski { 2021d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 20223cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 2023d9ae7f2bSJakub Kicinski 2024991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, insn->imm); 2025991f5b36SJiong Wang } 2026991f5b36SJiong Wang 2027991f5b36SJiong Wang static void shl_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2028991f5b36SJiong Wang { 2029991f5b36SJiong Wang emit_alu(nfp_prog, imm_both(nfp_prog), reg_imm(32), ALU_OP_SUB, 2030991f5b36SJiong Wang reg_b(src)); 2031991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, reg_imm(0)); 2032991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), SHF_OP_NONE, 2033991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 2034991f5b36SJiong Wang } 2035991f5b36SJiong Wang 2036991f5b36SJiong Wang /* NOTE: for indirect left shift, HIGH part should be calculated first. */ 2037991f5b36SJiong Wang static void shl_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2038991f5b36SJiong Wang { 2039991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2040991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2041991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 2042991f5b36SJiong Wang } 2043991f5b36SJiong Wang 2044991f5b36SJiong Wang static void shl_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2045991f5b36SJiong Wang { 2046991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 2047991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2048991f5b36SJiong Wang } 2049991f5b36SJiong Wang 2050991f5b36SJiong Wang static void shl_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2051991f5b36SJiong Wang { 2052991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2053991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2054991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 20553cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 2056991f5b36SJiong Wang } 2057991f5b36SJiong Wang 2058991f5b36SJiong Wang static int shl_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2059991f5b36SJiong Wang { 2060991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2061991f5b36SJiong Wang u64 umin, umax; 2062991f5b36SJiong Wang u8 dst, src; 2063991f5b36SJiong Wang 2064991f5b36SJiong Wang dst = insn->dst_reg * 2; 2065662c5472SJiong Wang umin = meta->umin_src; 2066662c5472SJiong Wang umax = meta->umax_src; 2067991f5b36SJiong Wang if (umin == umax) 2068991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, umin); 2069991f5b36SJiong Wang 2070991f5b36SJiong Wang src = insn->src_reg * 2; 2071991f5b36SJiong Wang if (umax < 32) { 2072991f5b36SJiong Wang shl_reg64_lt32(nfp_prog, dst, src); 2073991f5b36SJiong Wang } else if (umin >= 32) { 2074991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 2075991f5b36SJiong Wang } else { 2076991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2077991f5b36SJiong Wang * value of shift amount. 2078991f5b36SJiong Wang */ 2079991f5b36SJiong Wang u16 label_ge32, label_end; 2080991f5b36SJiong Wang 2081991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 7; 2082991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2083991f5b36SJiong Wang 2084991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 2085991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2086991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2087991f5b36SJiong Wang /* shl_reg64_lt32_low packed in delay slot. */ 2088991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2089991f5b36SJiong Wang 2090991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2091991f5b36SJiong Wang return -EINVAL; 2092991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 2093991f5b36SJiong Wang 2094991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2095991f5b36SJiong Wang return -EINVAL; 2096991f5b36SJiong Wang } 2097991f5b36SJiong Wang 2098991f5b36SJiong Wang return 0; 2099991f5b36SJiong Wang } 2100991f5b36SJiong Wang 2101991f5b36SJiong Wang /* Pseudo code: 2102991f5b36SJiong Wang * if shift_amt >= 32 2103991f5b36SJiong Wang * dst_high = 0; 2104991f5b36SJiong Wang * dst_low = dst_high >> shift_amt[4:0] 2105991f5b36SJiong Wang * else 2106991f5b36SJiong Wang * dst_high = dst_high >> shift_amt 2107991f5b36SJiong Wang * dst_low = (dst_high, dst_low) >> shift_amt 2108991f5b36SJiong Wang * 2109991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 2110991f5b36SJiong Wang */ 2111991f5b36SJiong Wang static int __shr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2112991f5b36SJiong Wang { 2113db0a4b3bSJiong Wang if (!shift_amt) 2114db0a4b3bSJiong Wang return 0; 2115db0a4b3bSJiong Wang 2116991f5b36SJiong Wang if (shift_amt < 32) { 2117991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2118991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2119991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2120991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2121991f5b36SJiong Wang } else if (shift_amt == 32) { 2122991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2123991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2124991f5b36SJiong Wang } else if (shift_amt > 32) { 2125991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2126991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2127991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 21283cae1319SJakub Kicinski } 2129d9ae7f2bSJakub Kicinski 2130d9ae7f2bSJakub Kicinski return 0; 2131d9ae7f2bSJakub Kicinski } 2132d9ae7f2bSJakub Kicinski 2133d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2134d9ae7f2bSJakub Kicinski { 2135d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 21363cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 2137d9ae7f2bSJakub Kicinski 2138991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, insn->imm); 2139991f5b36SJiong Wang } 2140991f5b36SJiong Wang 2141991f5b36SJiong Wang /* NOTE: for indirect right shift, LOW part should be calculated first. */ 2142991f5b36SJiong Wang static void shr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2143991f5b36SJiong Wang { 2144991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2145991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2146991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2147991f5b36SJiong Wang } 2148991f5b36SJiong Wang 2149991f5b36SJiong Wang static void shr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2150991f5b36SJiong Wang { 2151991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2152991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2153991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 2154991f5b36SJiong Wang } 2155991f5b36SJiong Wang 2156991f5b36SJiong Wang static void shr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2157991f5b36SJiong Wang { 2158991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2159991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2160991f5b36SJiong Wang } 2161991f5b36SJiong Wang 2162991f5b36SJiong Wang static void shr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2163991f5b36SJiong Wang { 2164991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2165991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2166991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 21673cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2168991f5b36SJiong Wang } 2169991f5b36SJiong Wang 2170991f5b36SJiong Wang static int shr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2171991f5b36SJiong Wang { 2172991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2173991f5b36SJiong Wang u64 umin, umax; 2174991f5b36SJiong Wang u8 dst, src; 2175991f5b36SJiong Wang 2176991f5b36SJiong Wang dst = insn->dst_reg * 2; 2177662c5472SJiong Wang umin = meta->umin_src; 2178662c5472SJiong Wang umax = meta->umax_src; 2179991f5b36SJiong Wang if (umin == umax) 2180991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, umin); 2181991f5b36SJiong Wang 2182991f5b36SJiong Wang src = insn->src_reg * 2; 2183991f5b36SJiong Wang if (umax < 32) { 2184991f5b36SJiong Wang shr_reg64_lt32(nfp_prog, dst, src); 2185991f5b36SJiong Wang } else if (umin >= 32) { 2186991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2187991f5b36SJiong Wang } else { 2188991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2189991f5b36SJiong Wang * value of shift amount. 2190991f5b36SJiong Wang */ 2191991f5b36SJiong Wang u16 label_ge32, label_end; 2192991f5b36SJiong Wang 2193991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2194991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2195991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2196991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2197991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2198991f5b36SJiong Wang /* shr_reg64_lt32_high packed in delay slot. */ 2199991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2200991f5b36SJiong Wang 2201991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2202991f5b36SJiong Wang return -EINVAL; 2203991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2204991f5b36SJiong Wang 2205991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2206991f5b36SJiong Wang return -EINVAL; 22073cae1319SJakub Kicinski } 2208d9ae7f2bSJakub Kicinski 2209d9ae7f2bSJakub Kicinski return 0; 2210d9ae7f2bSJakub Kicinski } 2211d9ae7f2bSJakub Kicinski 2212f43d0f17SJiong Wang /* Code logic is the same as __shr_imm64 except ashr requires signedness bit 2213f43d0f17SJiong Wang * told through PREV_ALU result. 2214f43d0f17SJiong Wang */ 2215c217abccSJiong Wang static int __ashr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2216c217abccSJiong Wang { 2217db0a4b3bSJiong Wang if (!shift_amt) 2218db0a4b3bSJiong Wang return 0; 2219db0a4b3bSJiong Wang 2220c217abccSJiong Wang if (shift_amt < 32) { 2221c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2222c217abccSJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2223c217abccSJiong Wang /* Set signedness bit. */ 2224c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2225c217abccSJiong Wang reg_imm(0)); 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, shift_amt); 2228c217abccSJiong Wang } else if (shift_amt == 32) { 2229c217abccSJiong Wang /* NOTE: this also helps setting signedness bit. */ 2230c217abccSJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2231c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2232c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2233c217abccSJiong Wang } else if (shift_amt > 32) { 2234c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2235c217abccSJiong Wang reg_imm(0)); 2236c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2237c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2238c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2239c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2240c217abccSJiong Wang } 2241c217abccSJiong Wang 2242c217abccSJiong Wang return 0; 2243c217abccSJiong Wang } 2244c217abccSJiong Wang 2245f43d0f17SJiong Wang static int ashr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2246f43d0f17SJiong Wang { 2247f43d0f17SJiong Wang const struct bpf_insn *insn = &meta->insn; 2248f43d0f17SJiong Wang u8 dst = insn->dst_reg * 2; 2249f43d0f17SJiong Wang 2250c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, insn->imm); 2251c217abccSJiong Wang } 2252c217abccSJiong Wang 2253c217abccSJiong Wang static void ashr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2254c217abccSJiong Wang { 2255c217abccSJiong Wang /* NOTE: the first insn will set both indirect shift amount (source A) 2256c217abccSJiong Wang * and signedness bit (MSB of result). 2257c217abccSJiong Wang */ 2258c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2259c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2260c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2261c217abccSJiong Wang } 2262c217abccSJiong Wang 2263c217abccSJiong Wang static void ashr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2264c217abccSJiong Wang { 2265c217abccSJiong Wang /* NOTE: it is the same as logic shift because we don't need to shift in 2266c217abccSJiong Wang * signedness bit when the shift amount is less than 32. 2267c217abccSJiong Wang */ 2268c217abccSJiong Wang return shr_reg64_lt32_low(nfp_prog, dst, src); 2269c217abccSJiong Wang } 2270c217abccSJiong Wang 2271c217abccSJiong Wang static void ashr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2272c217abccSJiong Wang { 2273c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2274c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2275c217abccSJiong Wang } 2276c217abccSJiong Wang 2277c217abccSJiong Wang static void ashr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2278c217abccSJiong Wang { 2279c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2280c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2281c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2282f43d0f17SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2283f43d0f17SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2284c217abccSJiong Wang } 2285c217abccSJiong Wang 2286c217abccSJiong Wang /* Like ashr_imm64, but need to use indirect shift. */ 2287c217abccSJiong Wang static int ashr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2288c217abccSJiong Wang { 2289c217abccSJiong Wang const struct bpf_insn *insn = &meta->insn; 2290c217abccSJiong Wang u64 umin, umax; 2291c217abccSJiong Wang u8 dst, src; 2292c217abccSJiong Wang 2293c217abccSJiong Wang dst = insn->dst_reg * 2; 2294662c5472SJiong Wang umin = meta->umin_src; 2295662c5472SJiong Wang umax = meta->umax_src; 2296c217abccSJiong Wang if (umin == umax) 2297c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, umin); 2298c217abccSJiong Wang 2299c217abccSJiong Wang src = insn->src_reg * 2; 2300c217abccSJiong Wang if (umax < 32) { 2301c217abccSJiong Wang ashr_reg64_lt32(nfp_prog, dst, src); 2302c217abccSJiong Wang } else if (umin >= 32) { 2303c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2304c217abccSJiong Wang } else { 2305c217abccSJiong Wang u16 label_ge32, label_end; 2306c217abccSJiong Wang 2307c217abccSJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2308c217abccSJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2309c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2310c217abccSJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2311c217abccSJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2312c217abccSJiong Wang /* ashr_reg64_lt32_high packed in delay slot. */ 2313c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2314c217abccSJiong Wang 2315c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2316c217abccSJiong Wang return -EINVAL; 2317c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2318c217abccSJiong Wang 2319c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2320c217abccSJiong Wang return -EINVAL; 2321f43d0f17SJiong Wang } 2322f43d0f17SJiong Wang 2323f43d0f17SJiong Wang return 0; 2324f43d0f17SJiong Wang } 2325f43d0f17SJiong Wang 2326d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2327d9ae7f2bSJakub Kicinski { 2328d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2329d9ae7f2bSJakub Kicinski 2330d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 2331d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2332d9ae7f2bSJakub Kicinski 2333d9ae7f2bSJakub Kicinski return 0; 2334d9ae7f2bSJakub Kicinski } 2335d9ae7f2bSJakub Kicinski 2336d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2337d9ae7f2bSJakub Kicinski { 2338d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2339d9ae7f2bSJakub Kicinski 2340d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 2341d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2342d9ae7f2bSJakub Kicinski 2343d9ae7f2bSJakub Kicinski return 0; 2344d9ae7f2bSJakub Kicinski } 2345d9ae7f2bSJakub Kicinski 2346d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2347d9ae7f2bSJakub Kicinski { 2348d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 2349d9ae7f2bSJakub Kicinski } 2350d9ae7f2bSJakub Kicinski 2351d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2352d9ae7f2bSJakub Kicinski { 2353f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR); 2354d9ae7f2bSJakub Kicinski } 2355d9ae7f2bSJakub Kicinski 2356d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2357d9ae7f2bSJakub Kicinski { 2358d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 2359d9ae7f2bSJakub Kicinski } 2360d9ae7f2bSJakub Kicinski 2361d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2362d9ae7f2bSJakub Kicinski { 2363f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND); 2364d9ae7f2bSJakub Kicinski } 2365d9ae7f2bSJakub Kicinski 2366d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2367d9ae7f2bSJakub Kicinski { 2368d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 2369d9ae7f2bSJakub Kicinski } 2370d9ae7f2bSJakub Kicinski 2371d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2372d9ae7f2bSJakub Kicinski { 2373f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR); 2374d9ae7f2bSJakub Kicinski } 2375d9ae7f2bSJakub Kicinski 2376d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2377d9ae7f2bSJakub Kicinski { 2378d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 2379d9ae7f2bSJakub Kicinski } 2380d9ae7f2bSJakub Kicinski 2381d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2382d9ae7f2bSJakub Kicinski { 2383f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD); 2384d9ae7f2bSJakub Kicinski } 2385d9ae7f2bSJakub Kicinski 2386d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2387d9ae7f2bSJakub Kicinski { 2388d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 2389d9ae7f2bSJakub Kicinski } 2390d9ae7f2bSJakub Kicinski 2391d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2392d9ae7f2bSJakub Kicinski { 2393f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB); 2394d9ae7f2bSJakub Kicinski } 2395d9ae7f2bSJakub Kicinski 2396d3d23fdbSJiong Wang static int mul_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2397d3d23fdbSJiong Wang { 2398d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, true); 2399d3d23fdbSJiong Wang } 2400d3d23fdbSJiong Wang 2401d3d23fdbSJiong Wang static int mul_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2402d3d23fdbSJiong Wang { 2403d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, false); 2404d3d23fdbSJiong Wang } 2405d3d23fdbSJiong Wang 24062a952b03SJiong Wang static int div_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24072a952b03SJiong Wang { 24082a952b03SJiong Wang return div_reg64(nfp_prog, meta); 24092a952b03SJiong Wang } 24102a952b03SJiong Wang 24112a952b03SJiong Wang static int div_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 24122a952b03SJiong Wang { 24132a952b03SJiong Wang return div_imm64(nfp_prog, meta); 24142a952b03SJiong Wang } 24152a952b03SJiong Wang 2416254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2417254ef4d7SJiong Wang { 2418254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 2419254ef4d7SJiong Wang 2420254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 24210b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst); 2422254ef4d7SJiong Wang 2423254ef4d7SJiong Wang return 0; 2424254ef4d7SJiong Wang } 2425254ef4d7SJiong Wang 24260b4de1ffSJiong Wang static int 24270b4de1ffSJiong Wang __ashr_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, u8 dst, 24280b4de1ffSJiong Wang u8 shift_amt) 242984708c13SJiong Wang { 2430db0a4b3bSJiong Wang if (shift_amt) { 243184708c13SJiong Wang /* Set signedness bit (MSB of result). */ 2432db0a4b3bSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst), ALU_OP_OR, 2433db0a4b3bSJiong Wang reg_imm(0)); 2434db0a4b3bSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2435db0a4b3bSJiong Wang reg_b(dst), SHF_SC_R_SHF, shift_amt); 2436db0a4b3bSJiong Wang } 24370b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst); 243884708c13SJiong Wang 243984708c13SJiong Wang return 0; 244084708c13SJiong Wang } 244184708c13SJiong Wang 244284708c13SJiong Wang static int ashr_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 244384708c13SJiong Wang { 244484708c13SJiong Wang const struct bpf_insn *insn = &meta->insn; 244584708c13SJiong Wang u64 umin, umax; 244684708c13SJiong Wang u8 dst, src; 244784708c13SJiong Wang 244884708c13SJiong Wang dst = insn->dst_reg * 2; 244984708c13SJiong Wang umin = meta->umin_src; 245084708c13SJiong Wang umax = meta->umax_src; 245184708c13SJiong Wang if (umin == umax) 24520b4de1ffSJiong Wang return __ashr_imm(nfp_prog, meta, dst, umin); 245384708c13SJiong Wang 245484708c13SJiong Wang src = insn->src_reg * 2; 245584708c13SJiong Wang /* NOTE: the first insn will set both indirect shift amount (source A) 245684708c13SJiong Wang * and signedness bit (MSB of result). 245784708c13SJiong Wang */ 245884708c13SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst)); 245984708c13SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 246084708c13SJiong Wang reg_b(dst), SHF_SC_R_SHF); 24610b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst); 246284708c13SJiong Wang 246384708c13SJiong Wang return 0; 246484708c13SJiong Wang } 246584708c13SJiong Wang 246684708c13SJiong Wang static int ashr_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 246784708c13SJiong Wang { 246884708c13SJiong Wang const struct bpf_insn *insn = &meta->insn; 246984708c13SJiong Wang u8 dst = insn->dst_reg * 2; 247084708c13SJiong Wang 24710b4de1ffSJiong Wang return __ashr_imm(nfp_prog, meta, dst, insn->imm); 247284708c13SJiong Wang } 247384708c13SJiong Wang 24740b4de1ffSJiong Wang static int 24750b4de1ffSJiong Wang __shr_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, u8 dst, 24760b4de1ffSJiong Wang u8 shift_amt) 2477ac7a1717SJiong Wang { 2478ac7a1717SJiong Wang if (shift_amt) 2479ac7a1717SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2480ac7a1717SJiong Wang reg_b(dst), SHF_SC_R_SHF, shift_amt); 24810b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst); 2482ac7a1717SJiong Wang return 0; 2483ac7a1717SJiong Wang } 2484ac7a1717SJiong Wang 2485ac7a1717SJiong Wang static int shr_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2486ac7a1717SJiong Wang { 2487ac7a1717SJiong Wang const struct bpf_insn *insn = &meta->insn; 2488ac7a1717SJiong Wang u8 dst = insn->dst_reg * 2; 2489ac7a1717SJiong Wang 24900b4de1ffSJiong Wang return __shr_imm(nfp_prog, meta, dst, insn->imm); 2491ac7a1717SJiong Wang } 2492ac7a1717SJiong Wang 2493ac7a1717SJiong Wang static int shr_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2494ac7a1717SJiong Wang { 2495ac7a1717SJiong Wang const struct bpf_insn *insn = &meta->insn; 2496ac7a1717SJiong Wang u64 umin, umax; 2497ac7a1717SJiong Wang u8 dst, src; 2498ac7a1717SJiong Wang 2499ac7a1717SJiong Wang dst = insn->dst_reg * 2; 2500ac7a1717SJiong Wang umin = meta->umin_src; 2501ac7a1717SJiong Wang umax = meta->umax_src; 2502ac7a1717SJiong Wang if (umin == umax) 25030b4de1ffSJiong Wang return __shr_imm(nfp_prog, meta, dst, umin); 2504ac7a1717SJiong Wang 2505ac7a1717SJiong Wang src = insn->src_reg * 2; 2506ac7a1717SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2507ac7a1717SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2508ac7a1717SJiong Wang reg_b(dst), SHF_SC_R_SHF); 25090b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst); 2510ac7a1717SJiong Wang return 0; 2511ac7a1717SJiong Wang } 2512ac7a1717SJiong Wang 25130b4de1ffSJiong Wang static int 25140b4de1ffSJiong Wang __shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, u8 dst, 25150b4de1ffSJiong Wang u8 shift_amt) 2516ac7a1717SJiong Wang { 2517ac7a1717SJiong Wang if (shift_amt) 2518ac7a1717SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2519ac7a1717SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 25200b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst); 2521ac7a1717SJiong Wang return 0; 2522ac7a1717SJiong Wang } 2523ac7a1717SJiong Wang 2524d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2525d9ae7f2bSJakub Kicinski { 2526d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2527ac7a1717SJiong Wang u8 dst = insn->dst_reg * 2; 2528d9ae7f2bSJakub Kicinski 25290b4de1ffSJiong Wang return __shl_imm(nfp_prog, meta, dst, insn->imm); 2530ac7a1717SJiong Wang } 2531d9ae7f2bSJakub Kicinski 2532ac7a1717SJiong Wang static int shl_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2533ac7a1717SJiong Wang { 2534ac7a1717SJiong Wang const struct bpf_insn *insn = &meta->insn; 2535ac7a1717SJiong Wang u64 umin, umax; 2536ac7a1717SJiong Wang u8 dst, src; 2537ac7a1717SJiong Wang 2538ac7a1717SJiong Wang dst = insn->dst_reg * 2; 2539ac7a1717SJiong Wang umin = meta->umin_src; 2540ac7a1717SJiong Wang umax = meta->umax_src; 2541ac7a1717SJiong Wang if (umin == umax) 25420b4de1ffSJiong Wang return __shl_imm(nfp_prog, meta, dst, umin); 2543ac7a1717SJiong Wang 2544ac7a1717SJiong Wang src = insn->src_reg * 2; 2545ac7a1717SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 25460b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst); 2547d9ae7f2bSJakub Kicinski return 0; 2548d9ae7f2bSJakub Kicinski } 2549d9ae7f2bSJakub Kicinski 25503119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 25513119d1fdSJakub Kicinski { 25523119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 25533119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 25543119d1fdSJakub Kicinski 25553119d1fdSJakub Kicinski switch (insn->imm) { 25563119d1fdSJakub Kicinski case 16: 25573119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 25583119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 25593119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 25603119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 25613119d1fdSJakub Kicinski 25623119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 25633119d1fdSJakub Kicinski break; 25643119d1fdSJakub Kicinski case 32: 25653119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 25663119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 25673119d1fdSJakub Kicinski break; 25683119d1fdSJakub Kicinski case 64: 25693119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 25703119d1fdSJakub Kicinski 25713119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 25723119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 25733119d1fdSJakub Kicinski break; 25743119d1fdSJakub Kicinski } 25753119d1fdSJakub Kicinski 25763119d1fdSJakub Kicinski return 0; 25773119d1fdSJakub Kicinski } 25783119d1fdSJakub Kicinski 2579d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2580d9ae7f2bSJakub Kicinski { 25819f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 25829f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 25839f16c8abSJakub Kicinski u8 dst; 25849f16c8abSJakub Kicinski 25859f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 25869f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 25879f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 25889f16c8abSJakub Kicinski 25899f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 25909f16c8abSJakub Kicinski 25919f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 25929f16c8abSJakub Kicinski if (imm_hi == imm_lo) 25939f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 25949f16c8abSJakub Kicinski else 25959f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 2596d9ae7f2bSJakub Kicinski 2597d9ae7f2bSJakub Kicinski return 0; 2598d9ae7f2bSJakub Kicinski } 2599d9ae7f2bSJakub Kicinski 2600d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2601d9ae7f2bSJakub Kicinski { 2602d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 2603d9ae7f2bSJakub Kicinski return 0; 2604d9ae7f2bSJakub Kicinski } 2605d9ae7f2bSJakub Kicinski 2606d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2607d9ae7f2bSJakub Kicinski { 26080b4de1ffSJiong Wang return construct_data_ld(nfp_prog, meta, meta->insn.imm, 1); 2609d9ae7f2bSJakub Kicinski } 2610d9ae7f2bSJakub Kicinski 2611d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2612d9ae7f2bSJakub Kicinski { 26130b4de1ffSJiong Wang return construct_data_ld(nfp_prog, meta, meta->insn.imm, 2); 2614d9ae7f2bSJakub Kicinski } 2615d9ae7f2bSJakub Kicinski 2616d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2617d9ae7f2bSJakub Kicinski { 26180b4de1ffSJiong Wang return construct_data_ld(nfp_prog, meta, meta->insn.imm, 4); 2619d9ae7f2bSJakub Kicinski } 2620d9ae7f2bSJakub Kicinski 2621d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2622d9ae7f2bSJakub Kicinski { 26230b4de1ffSJiong Wang return construct_data_ind_ld(nfp_prog, meta, meta->insn.imm, 26240a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 2625d9ae7f2bSJakub Kicinski } 2626d9ae7f2bSJakub Kicinski 2627d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2628d9ae7f2bSJakub Kicinski { 26290b4de1ffSJiong Wang return construct_data_ind_ld(nfp_prog, meta, meta->insn.imm, 26300a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 2631d9ae7f2bSJakub Kicinski } 2632d9ae7f2bSJakub Kicinski 2633d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2634d9ae7f2bSJakub Kicinski { 26350b4de1ffSJiong Wang return construct_data_ind_ld(nfp_prog, meta, meta->insn.imm, 26360a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 2637d9ae7f2bSJakub Kicinski } 2638d9ae7f2bSJakub Kicinski 2639a82b23fbSJakub Kicinski static int 2640a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2641d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2642a82b23fbSJakub Kicinski { 2643d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2644b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 2645b14157eeSJakub Kicinski true, wrp_lmem_load); 2646a82b23fbSJakub Kicinski } 2647a82b23fbSJakub Kicinski 2648943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2649943c57b9SJakub Kicinski u8 size) 2650d9ae7f2bSJakub Kicinski { 2651bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2652bfddbc8aSJakub Kicinski 2653943c57b9SJakub Kicinski switch (meta->insn.off) { 2654c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 2655c593642cSPankaj Bharadiya if (size != sizeof_field(struct __sk_buff, len)) 2656943c57b9SJakub Kicinski return -EOPNOTSUPP; 2657bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 2658bfddbc8aSJakub Kicinski break; 2659c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 2660c593642cSPankaj Bharadiya if (size != sizeof_field(struct __sk_buff, data)) 2661bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2662bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2663bfddbc8aSJakub Kicinski break; 2664c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 2665c593642cSPankaj Bharadiya if (size != sizeof_field(struct __sk_buff, data_end)) 2666bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2667bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 2668bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2669943c57b9SJakub Kicinski break; 2670943c57b9SJakub Kicinski default: 2671d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2672943c57b9SJakub Kicinski } 2673943c57b9SJakub Kicinski 2674943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2675d9ae7f2bSJakub Kicinski 2676d9ae7f2bSJakub Kicinski return 0; 2677d9ae7f2bSJakub Kicinski } 2678d9ae7f2bSJakub Kicinski 2679943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2680943c57b9SJakub Kicinski u8 size) 2681d9ae7f2bSJakub Kicinski { 2682b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2683d9ae7f2bSJakub Kicinski 2684943c57b9SJakub Kicinski switch (meta->insn.off) { 2685c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 2686c593642cSPankaj Bharadiya if (size != sizeof_field(struct xdp_md, data)) 2687c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2688c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2689943c57b9SJakub Kicinski break; 2690c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 2691c593642cSPankaj Bharadiya if (size != sizeof_field(struct xdp_md, data_end)) 2692c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2693943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 2694943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2695943c57b9SJakub Kicinski break; 2696943c57b9SJakub Kicinski default: 2697943c57b9SJakub Kicinski return -EOPNOTSUPP; 2698943c57b9SJakub Kicinski } 2699d9ae7f2bSJakub Kicinski 2700943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2701d9ae7f2bSJakub Kicinski 2702d9ae7f2bSJakub Kicinski return 0; 2703d9ae7f2bSJakub Kicinski } 2704d9ae7f2bSJakub Kicinski 27052ca71441SJakub Kicinski static int 27062ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 27072ca71441SJakub Kicinski unsigned int size) 27082ca71441SJakub Kicinski { 27092ca71441SJakub Kicinski swreg tmp_reg; 27102ca71441SJakub Kicinski 27112ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 27122ca71441SJakub Kicinski 27130b4de1ffSJiong Wang return data_ld_host_order_addr32(nfp_prog, meta, meta->insn.src_reg * 2, 27143dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 27153dd43c33SJakub Kicinski } 27163dd43c33SJakub Kicinski 27173dd43c33SJakub Kicinski static int 27183dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 27193dd43c33SJakub Kicinski unsigned int size) 27203dd43c33SJakub Kicinski { 27213dd43c33SJakub Kicinski swreg tmp_reg; 27223dd43c33SJakub Kicinski 27233dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 27243dd43c33SJakub Kicinski 27250b4de1ffSJiong Wang return data_ld_host_order_addr40(nfp_prog, meta, meta->insn.src_reg * 2, 27263dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 27272ca71441SJakub Kicinski } 27282ca71441SJakub Kicinski 2729be759237SJiong Wang static void 2730be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 2731be759237SJiong Wang struct nfp_insn_meta *meta) 2732be759237SJiong Wang { 2733be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 2734be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 2735be759237SJiong Wang swreg src_base, off; 2736be759237SJiong Wang u8 xfer_num, len; 2737be759237SJiong Wang bool indir; 2738be759237SJiong Wang 2739be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 2740be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 2741be759237SJiong Wang len = range_end - range_start; 2742be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 2743be759237SJiong Wang 2744be759237SJiong Wang indir = len > 8 * REG_WIDTH; 2745be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 2746be759237SJiong Wang if (indir) 2747be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 2748be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 2749be759237SJiong Wang 2750be759237SJiong Wang /* Cache memory into transfer-in registers. */ 2751be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 2752b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 2753be759237SJiong Wang } 2754be759237SJiong Wang 2755be759237SJiong Wang static int 275691ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 275791ff69e8SJiong Wang struct nfp_insn_meta *meta, 275891ff69e8SJiong Wang unsigned int size) 275991ff69e8SJiong Wang { 276091ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 276191ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 276291ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 276391ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 276491ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 276591ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 276691ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 276791ff69e8SJiong Wang 276891ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 276991ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 277091ff69e8SJiong Wang src_lo = reg_xfer(idx); 277191ff69e8SJiong Wang 277291ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 277391ff69e8SJiong Wang if (size > REG_WIDTH - off) { 277491ff69e8SJiong Wang /* Calculate the part in the second register. */ 277591ff69e8SJiong Wang len_lo = REG_WIDTH - off; 277691ff69e8SJiong Wang len_mid = size - len_lo; 277791ff69e8SJiong Wang 277891ff69e8SJiong Wang /* Calculate the part in the third register. */ 277991ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 278091ff69e8SJiong Wang len_mid = REG_WIDTH; 278191ff69e8SJiong Wang } 278291ff69e8SJiong Wang 278391ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 278491ff69e8SJiong Wang 278591ff69e8SJiong Wang if (!len_mid) { 27860b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst_gpr); 278791ff69e8SJiong Wang return 0; 278891ff69e8SJiong Wang } 278991ff69e8SJiong Wang 279091ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 279191ff69e8SJiong Wang 279291ff69e8SJiong Wang if (size <= REG_WIDTH) { 279391ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 27940b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst_gpr); 279591ff69e8SJiong Wang } else { 279691ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 279791ff69e8SJiong Wang 279891ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 279991ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 280091ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 280191ff69e8SJiong Wang REG_WIDTH - len_lo); 280291ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 280391ff69e8SJiong Wang len_lo); 280491ff69e8SJiong Wang } 280591ff69e8SJiong Wang 280691ff69e8SJiong Wang return 0; 280791ff69e8SJiong Wang } 280891ff69e8SJiong Wang 280991ff69e8SJiong Wang static int 2810be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 2811be759237SJiong Wang struct nfp_insn_meta *meta, 2812be759237SJiong Wang unsigned int size) 2813be759237SJiong Wang { 2814be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 2815be759237SJiong Wang u8 dst_gpr, idx; 2816be759237SJiong Wang 2817be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 2818be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 2819be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 2820be759237SJiong Wang dst_lo = reg_both(dst_gpr); 2821be759237SJiong Wang src_lo = reg_xfer(idx); 2822be759237SJiong Wang 2823be759237SJiong Wang if (size < REG_WIDTH) { 2824be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 28250b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst_gpr); 2826be759237SJiong Wang } else if (size == REG_WIDTH) { 2827be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 28280b4de1ffSJiong Wang wrp_zext(nfp_prog, meta, dst_gpr); 2829be759237SJiong Wang } else { 2830be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 2831be759237SJiong Wang 2832be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2833be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 2834be759237SJiong Wang } 2835be759237SJiong Wang 2836be759237SJiong Wang return 0; 2837be759237SJiong Wang } 2838be759237SJiong Wang 2839be759237SJiong Wang static int 2840be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 2841be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 2842be759237SJiong Wang { 2843be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 2844be759237SJiong Wang 284591ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 2846be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 284791ff69e8SJiong Wang 284891ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 2849be759237SJiong Wang } 2850be759237SJiong Wang 28512ca71441SJakub Kicinski static int 28522ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 28532ca71441SJakub Kicinski unsigned int size) 28542ca71441SJakub Kicinski { 28559879a381SJiong Wang if (meta->ldst_gather_len) 28569879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 28579879a381SJiong Wang 28582ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2859012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 28602ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 28612ca71441SJakub Kicinski else 28622ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 28632ca71441SJakub Kicinski } 28642ca71441SJakub Kicinski 2865be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2866be759237SJiong Wang if (meta->pkt_cache.range_end) { 2867be759237SJiong Wang if (meta->pkt_cache.do_init) 2868be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2869be759237SJiong Wang 2870be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2871be759237SJiong Wang } else { 28722ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2873be759237SJiong Wang } 2874be759237SJiong Wang } 28752ca71441SJakub Kicinski 2876a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2877d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2878d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2879a82b23fbSJakub Kicinski 28803dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 28813dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 28823dd43c33SJakub Kicinski 28832ca71441SJakub Kicinski return -EOPNOTSUPP; 28842ca71441SJakub Kicinski } 28852ca71441SJakub Kicinski 28862ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 28872ca71441SJakub Kicinski { 28882ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 28892ca71441SJakub Kicinski } 28902ca71441SJakub Kicinski 28912ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 28922ca71441SJakub Kicinski { 28932ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 28942ca71441SJakub Kicinski } 28952ca71441SJakub Kicinski 2896d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2897d9ae7f2bSJakub Kicinski { 28982ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 28992ca71441SJakub Kicinski } 29002ca71441SJakub Kicinski 29012ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 29022ca71441SJakub Kicinski { 29032ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2904d9ae7f2bSJakub Kicinski } 2905d9ae7f2bSJakub Kicinski 2906e663fe38SJakub Kicinski static int 2907e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2908e663fe38SJakub Kicinski unsigned int size) 2909d9ae7f2bSJakub Kicinski { 2910e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2911e663fe38SJakub Kicinski swreg off_reg; 2912e663fe38SJakub Kicinski 2913e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2914e663fe38SJakub Kicinski 2915e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2916e663fe38SJakub Kicinski imm, size); 2917e663fe38SJakub Kicinski } 2918e663fe38SJakub Kicinski 2919e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2920e663fe38SJakub Kicinski unsigned int size) 2921e663fe38SJakub Kicinski { 2922e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2923e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2924e663fe38SJakub Kicinski 2925d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2926d9ae7f2bSJakub Kicinski } 2927d9ae7f2bSJakub Kicinski 2928e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2929d9ae7f2bSJakub Kicinski { 2930e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2931e663fe38SJakub Kicinski } 2932e663fe38SJakub Kicinski 2933e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2934e663fe38SJakub Kicinski { 2935e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2936e663fe38SJakub Kicinski } 2937e663fe38SJakub Kicinski 2938e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2939e663fe38SJakub Kicinski { 2940e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2941e663fe38SJakub Kicinski } 2942e663fe38SJakub Kicinski 2943e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2944e663fe38SJakub Kicinski { 2945e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2946e663fe38SJakub Kicinski } 2947e663fe38SJakub Kicinski 2948e663fe38SJakub Kicinski static int 2949e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2950e663fe38SJakub Kicinski unsigned int size) 2951e663fe38SJakub Kicinski { 2952e663fe38SJakub Kicinski swreg off_reg; 2953e663fe38SJakub Kicinski 2954e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2955e663fe38SJakub Kicinski 2956e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2957e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2958e663fe38SJakub Kicinski } 2959e663fe38SJakub Kicinski 2960e663fe38SJakub Kicinski static int 2961ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2962d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2963ee9133a8SJakub Kicinski { 2964d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2965b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2966b14157eeSJakub Kicinski false, wrp_lmem_store); 2967ee9133a8SJakub Kicinski } 2968ee9133a8SJakub Kicinski 2969d985888fSJakub Kicinski static int mem_stx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2970d985888fSJakub Kicinski { 2971d985888fSJakub Kicinski switch (meta->insn.off) { 2972d985888fSJakub Kicinski case offsetof(struct xdp_md, rx_queue_index): 2973d985888fSJakub Kicinski return nfp_queue_select(nfp_prog, meta); 2974d985888fSJakub Kicinski } 2975d985888fSJakub Kicinski 2976d985888fSJakub Kicinski WARN_ON_ONCE(1); /* verifier should have rejected bad accesses */ 2977d985888fSJakub Kicinski return -EOPNOTSUPP; 2978d985888fSJakub Kicinski } 2979d985888fSJakub Kicinski 2980ee9133a8SJakub Kicinski static int 2981e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2982e663fe38SJakub Kicinski unsigned int size) 2983e663fe38SJakub Kicinski { 2984e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2985e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2986e663fe38SJakub Kicinski 2987ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2988d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2989d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2990ee9133a8SJakub Kicinski 2991d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2992d9ae7f2bSJakub Kicinski } 2993d9ae7f2bSJakub Kicinski 2994e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2995e663fe38SJakub Kicinski { 2996e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2997e663fe38SJakub Kicinski } 2998e663fe38SJakub Kicinski 2999e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3000e663fe38SJakub Kicinski { 3001e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 3002e663fe38SJakub Kicinski } 3003e663fe38SJakub Kicinski 3004d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3005d9ae7f2bSJakub Kicinski { 3006d985888fSJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) 3007d985888fSJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 3008d985888fSJakub Kicinski return mem_stx_xdp(nfp_prog, meta); 3009e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 3010e663fe38SJakub Kicinski } 30112ca71441SJakub Kicinski 3012e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3013e663fe38SJakub Kicinski { 3014e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 3015d9ae7f2bSJakub Kicinski } 3016d9ae7f2bSJakub Kicinski 3017dcb0c27fSJakub Kicinski static int 3018dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 3019dcb0c27fSJakub Kicinski { 3020dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 3021dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 302241aed09cSJakub Kicinski unsigned int full_add, out; 302341aed09cSJakub Kicinski swreg addra, addrb, off; 3024dcb0c27fSJakub Kicinski 3025dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 3026dcb0c27fSJakub Kicinski 302741aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 302841aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 302941aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 303041aed09cSJakub Kicinski * code for both. 303141aed09cSJakub Kicinski */ 303241aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 303341aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 303441aed09cSJakub Kicinski 303541aed09cSJakub Kicinski if (meta->insn.off) { 303641aed09cSJakub Kicinski out += 2; 303741aed09cSJakub Kicinski full_add += 2; 303841aed09cSJakub Kicinski } 303941aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 304041aed09cSJakub Kicinski out += 3; 304141aed09cSJakub Kicinski full_add += 3; 304241aed09cSJakub Kicinski } 304341aed09cSJakub Kicinski if (meta->xadd_over_16bit) 304441aed09cSJakub Kicinski out += 2 + is64; 304541aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 304641aed09cSJakub Kicinski out += 5; 304741aed09cSJakub Kicinski full_add += 5; 304841aed09cSJakub Kicinski } 304941aed09cSJakub Kicinski 305041aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 305141aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 305241aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 305341aed09cSJakub Kicinski 305441aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 305541aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 305641aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 305741aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 305841aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 305941aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 306041aed09cSJakub Kicinski /* defer for add */ 306141aed09cSJakub Kicinski } 306241aed09cSJakub Kicinski 3063dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 3064dcb0c27fSJakub Kicinski if (!meta->insn.off) { 3065dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 3066dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 3067dcb0c27fSJakub Kicinski } else { 3068dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 3069dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 3070dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 3071dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 3072dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 3073dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 3074dcb0c27fSJakub Kicinski } 3075dcb0c27fSJakub Kicinski 307641aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 307741aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 307841aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 307941aed09cSJakub Kicinski 3080dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 3081dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 3082dcb0c27fSJakub Kicinski CMD_OVE_LEN | 3083dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 3084dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 3085dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 3086b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 3087dcb0c27fSJakub Kicinski 308841aed09cSJakub Kicinski if (meta->xadd_over_16bit) 308941aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 309041aed09cSJakub Kicinski } 309141aed09cSJakub Kicinski 309241aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 309341aed09cSJakub Kicinski return -EINVAL; 309441aed09cSJakub Kicinski 309541aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 309641aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 309741aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 309841aed09cSJakub Kicinski addra, addrb, is64 << 2, 309941aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 310041aed09cSJakub Kicinski 310141aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 310241aed09cSJakub Kicinski if (is64) 310341aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 310441aed09cSJakub Kicinski } 310541aed09cSJakub Kicinski 310641aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 310741aed09cSJakub Kicinski return -EINVAL; 310841aed09cSJakub Kicinski 3109dcb0c27fSJakub Kicinski return 0; 3110dcb0c27fSJakub Kicinski } 3111dcb0c27fSJakub Kicinski 3112dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3113dcb0c27fSJakub Kicinski { 3114dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 3115dcb0c27fSJakub Kicinski } 3116dcb0c27fSJakub Kicinski 3117dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3118dcb0c27fSJakub Kicinski { 3119dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 3120dcb0c27fSJakub Kicinski } 3121dcb0c27fSJakub Kicinski 3122d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3123d9ae7f2bSJakub Kicinski { 3124d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 3125d9ae7f2bSJakub Kicinski 3126d9ae7f2bSJakub Kicinski return 0; 3127d9ae7f2bSJakub Kicinski } 3128d9ae7f2bSJakub Kicinski 3129d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3130d9ae7f2bSJakub Kicinski { 3131d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3132d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 3133b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 3134b3f868dfSJakub Kicinski 3135b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 3136b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 3137d9ae7f2bSJakub Kicinski 3138d9ae7f2bSJakub Kicinski if (imm & ~0U) { 3139d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3140d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 3141d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 3142d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 3143d9ae7f2bSJakub Kicinski } 3144d9ae7f2bSJakub Kicinski 3145d9ae7f2bSJakub Kicinski if (imm >> 32) { 3146d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3147d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 3148d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 3149d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 3150d9ae7f2bSJakub Kicinski } 3151d9ae7f2bSJakub Kicinski 3152d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 3153d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 3154d9ae7f2bSJakub Kicinski 3155d9ae7f2bSJakub Kicinski return 0; 3156d9ae7f2bSJakub Kicinski } 3157d9ae7f2bSJakub Kicinski 315846144839SJiong Wang static int jeq32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 315946144839SJiong Wang { 316046144839SJiong Wang const struct bpf_insn *insn = &meta->insn; 316146144839SJiong Wang swreg tmp_reg; 316246144839SJiong Wang 316346144839SJiong Wang tmp_reg = ur_load_imm_any(nfp_prog, insn->imm, imm_b(nfp_prog)); 316446144839SJiong Wang emit_alu(nfp_prog, reg_none(), 316546144839SJiong Wang reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 316646144839SJiong Wang emit_br(nfp_prog, BR_BEQ, insn->off, 0); 316746144839SJiong Wang 316846144839SJiong Wang return 0; 316946144839SJiong Wang } 317046144839SJiong Wang 3171d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3172d9ae7f2bSJakub Kicinski { 3173d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3174d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 31754987eaccSJakub Kicinski u8 dst_gpr = insn->dst_reg * 2; 3176b3f868dfSJakub Kicinski swreg tmp_reg; 3177d9ae7f2bSJakub Kicinski 3178d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 31794987eaccSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 31804987eaccSJakub Kicinski reg_a(dst_gpr), ALU_OP_AND, tmp_reg); 31814987eaccSJakub Kicinski /* Upper word of the mask can only be 0 or ~0 from sign extension, 31824987eaccSJakub Kicinski * so either ignore it or OR the whole thing in. 31834987eaccSJakub Kicinski */ 318446144839SJiong Wang if (is_mbpf_jmp64(meta) && imm >> 32) { 3185d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 31864987eaccSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_OR, imm_b(nfp_prog)); 318746144839SJiong Wang } 3188d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3189d9ae7f2bSJakub Kicinski 3190d9ae7f2bSJakub Kicinski return 0; 3191d9ae7f2bSJakub Kicinski } 3192d9ae7f2bSJakub Kicinski 3193d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3194d9ae7f2bSJakub Kicinski { 3195d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3196d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 319746144839SJiong Wang bool is_jmp32 = is_mbpf_jmp32(meta); 3198b3f868dfSJakub Kicinski swreg tmp_reg; 3199d9ae7f2bSJakub Kicinski 3200d9ae7f2bSJakub Kicinski if (!imm) { 320146144839SJiong Wang if (is_jmp32) 320246144839SJiong Wang emit_alu(nfp_prog, reg_none(), reg_none(), ALU_OP_NONE, 320346144839SJiong Wang reg_b(insn->dst_reg * 2)); 320446144839SJiong Wang else 3205d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 3206d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 3207d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 320882837370SJakub Kicinski return 0; 3209d9ae7f2bSJakub Kicinski } 3210d9ae7f2bSJakub Kicinski 3211d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3212d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3213d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 3214d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3215d9ae7f2bSJakub Kicinski 321646144839SJiong Wang if (is_jmp32) 321746144839SJiong Wang return 0; 321846144839SJiong Wang 3219d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3220d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3221d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 3222d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3223d9ae7f2bSJakub Kicinski 3224d9ae7f2bSJakub Kicinski return 0; 3225d9ae7f2bSJakub Kicinski } 3226d9ae7f2bSJakub Kicinski 3227d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3228d9ae7f2bSJakub Kicinski { 3229d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3230d9ae7f2bSJakub Kicinski 3231d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 3232d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 323346144839SJiong Wang if (is_mbpf_jmp64(meta)) { 323446144839SJiong Wang emit_alu(nfp_prog, imm_b(nfp_prog), 323546144839SJiong Wang reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, 323646144839SJiong Wang reg_b(insn->src_reg * 2 + 1)); 323746144839SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, 323846144839SJiong Wang imm_b(nfp_prog)); 323946144839SJiong Wang } 3240d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 3241d9ae7f2bSJakub Kicinski 3242d9ae7f2bSJakub Kicinski return 0; 3243d9ae7f2bSJakub Kicinski } 3244d9ae7f2bSJakub Kicinski 3245d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3246d9ae7f2bSJakub Kicinski { 3247d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 3248d9ae7f2bSJakub Kicinski } 3249d9ae7f2bSJakub Kicinski 3250d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3251d9ae7f2bSJakub Kicinski { 3252d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 3253d9ae7f2bSJakub Kicinski } 3254d9ae7f2bSJakub Kicinski 3255389f263bSQuentin Monnet static int 3256389f263bSQuentin Monnet bpf_to_bpf_call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3257389f263bSQuentin Monnet { 3258bdf4c66fSQuentin Monnet u32 ret_tgt, stack_depth, offset_br; 3259389f263bSQuentin Monnet swreg tmp_reg; 3260389f263bSQuentin Monnet 3261389f263bSQuentin Monnet stack_depth = round_up(nfp_prog->stack_frame_depth, STACK_FRAME_ALIGN); 3262389f263bSQuentin Monnet /* Space for saving the return address is accounted for by the callee, 3263389f263bSQuentin Monnet * so stack_depth can be zero for the main function. 3264389f263bSQuentin Monnet */ 3265389f263bSQuentin Monnet if (stack_depth) { 3266389f263bSQuentin Monnet tmp_reg = ur_load_imm_any(nfp_prog, stack_depth, 3267389f263bSQuentin Monnet stack_imm(nfp_prog)); 3268389f263bSQuentin Monnet emit_alu(nfp_prog, stack_reg(nfp_prog), 3269389f263bSQuentin Monnet stack_reg(nfp_prog), ALU_OP_ADD, tmp_reg); 3270389f263bSQuentin Monnet emit_csr_wr(nfp_prog, stack_reg(nfp_prog), 3271389f263bSQuentin Monnet NFP_CSR_ACT_LM_ADDR0); 3272389f263bSQuentin Monnet } 3273389f263bSQuentin Monnet 327444549623SQuentin Monnet /* Two cases for jumping to the callee: 327544549623SQuentin Monnet * 327644549623SQuentin Monnet * - If callee uses and needs to save R6~R9 then: 3277389f263bSQuentin Monnet * 1. Put the start offset of the callee into imm_b(). This will 3278389f263bSQuentin Monnet * require a fixup step, as we do not necessarily know this 3279389f263bSQuentin Monnet * address yet. 3280389f263bSQuentin Monnet * 2. Put the return address from the callee to the caller into 3281389f263bSQuentin Monnet * register ret_reg(). 3282389f263bSQuentin Monnet * 3. (After defer slots are consumed) Jump to the subroutine that 3283389f263bSQuentin Monnet * pushes the registers to the stack. 3284389f263bSQuentin Monnet * The subroutine acts as a trampoline, and returns to the address in 3285389f263bSQuentin Monnet * imm_b(), i.e. jumps to the callee. 3286389f263bSQuentin Monnet * 328744549623SQuentin Monnet * - If callee does not need to save R6~R9 then just load return 328844549623SQuentin Monnet * address to the caller in ret_reg(), and jump to the callee 328944549623SQuentin Monnet * directly. 329044549623SQuentin Monnet * 3291389f263bSQuentin Monnet * Using ret_reg() to pass the return address to the callee is set here 3292389f263bSQuentin Monnet * as a convention. The callee can then push this address onto its 3293389f263bSQuentin Monnet * stack frame in its prologue. The advantages of passing the return 3294389f263bSQuentin Monnet * address through ret_reg(), instead of pushing it to the stack right 3295389f263bSQuentin Monnet * here, are the following: 3296389f263bSQuentin Monnet * - It looks cleaner. 3297389f263bSQuentin Monnet * - If the called function is called multiple time, we get a lower 3298389f263bSQuentin Monnet * program size. 3299389f263bSQuentin Monnet * - We save two no-op instructions that should be added just before 3300389f263bSQuentin Monnet * the emit_br() when stack depth is not null otherwise. 3301389f263bSQuentin Monnet * - If we ever find a register to hold the return address during whole 3302389f263bSQuentin Monnet * execution of the callee, we will not have to push the return 3303389f263bSQuentin Monnet * address to the stack for leaf functions. 3304389f263bSQuentin Monnet */ 330544549623SQuentin Monnet if (!meta->jmp_dst) { 330644549623SQuentin Monnet pr_err("BUG: BPF-to-BPF call has no destination recorded\n"); 330744549623SQuentin Monnet return -ELOOP; 330844549623SQuentin Monnet } 330944549623SQuentin Monnet if (nfp_prog->subprog[meta->jmp_dst->subprog_idx].needs_reg_push) { 3310389f263bSQuentin Monnet ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 3311389f263bSQuentin Monnet emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, 3312389f263bSQuentin Monnet RELO_BR_GO_CALL_PUSH_REGS); 3313bdf4c66fSQuentin Monnet offset_br = nfp_prog_current_offset(nfp_prog); 3314389f263bSQuentin Monnet wrp_immed_relo(nfp_prog, imm_b(nfp_prog), 0, RELO_IMMED_REL); 331544549623SQuentin Monnet } else { 331644549623SQuentin Monnet ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 3317e90287f3SJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.imm, 1); 331844549623SQuentin Monnet offset_br = nfp_prog_current_offset(nfp_prog); 331944549623SQuentin Monnet } 3320389f263bSQuentin Monnet wrp_immed_relo(nfp_prog, ret_reg(nfp_prog), ret_tgt, RELO_IMMED_REL); 3321389f263bSQuentin Monnet 3322389f263bSQuentin Monnet if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 3323389f263bSQuentin Monnet return -EINVAL; 3324389f263bSQuentin Monnet 3325389f263bSQuentin Monnet if (stack_depth) { 3326389f263bSQuentin Monnet tmp_reg = ur_load_imm_any(nfp_prog, stack_depth, 3327389f263bSQuentin Monnet stack_imm(nfp_prog)); 3328389f263bSQuentin Monnet emit_alu(nfp_prog, stack_reg(nfp_prog), 3329389f263bSQuentin Monnet stack_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 3330389f263bSQuentin Monnet emit_csr_wr(nfp_prog, stack_reg(nfp_prog), 3331389f263bSQuentin Monnet NFP_CSR_ACT_LM_ADDR0); 3332389f263bSQuentin Monnet wrp_nops(nfp_prog, 3); 3333389f263bSQuentin Monnet } 3334389f263bSQuentin Monnet 3335bdf4c66fSQuentin Monnet meta->num_insns_after_br = nfp_prog_current_offset(nfp_prog); 3336bdf4c66fSQuentin Monnet meta->num_insns_after_br -= offset_br; 3337bdf4c66fSQuentin Monnet 3338389f263bSQuentin Monnet return 0; 3339389f263bSQuentin Monnet } 3340389f263bSQuentin Monnet 3341389f263bSQuentin Monnet static int helper_call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 33422cb230bdSJakub Kicinski { 33432cb230bdSJakub Kicinski switch (meta->insn.imm) { 33440d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 33450d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 33460c261593SJakub Kicinski case BPF_FUNC_xdp_adjust_tail: 33470c261593SJakub Kicinski return adjust_tail(nfp_prog, meta); 334877a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 334944d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 3350bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3351fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 3352df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 3353df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 33549816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 33559816dd35SJakub Kicinski return nfp_perf_event_output(nfp_prog, meta); 33562cb230bdSJakub Kicinski default: 33572cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 33582cb230bdSJakub Kicinski return -EOPNOTSUPP; 33592cb230bdSJakub Kicinski } 33602cb230bdSJakub Kicinski } 33612cb230bdSJakub Kicinski 3362389f263bSQuentin Monnet static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3363389f263bSQuentin Monnet { 3364389f263bSQuentin Monnet if (is_mbpf_pseudo_call(meta)) 3365389f263bSQuentin Monnet return bpf_to_bpf_call(nfp_prog, meta); 3366389f263bSQuentin Monnet else 3367389f263bSQuentin Monnet return helper_call(nfp_prog, meta); 3368389f263bSQuentin Monnet } 3369389f263bSQuentin Monnet 3370389f263bSQuentin Monnet static bool nfp_is_main_function(struct nfp_insn_meta *meta) 3371389f263bSQuentin Monnet { 3372389f263bSQuentin Monnet return meta->subprog_idx == 0; 3373389f263bSQuentin Monnet } 3374389f263bSQuentin Monnet 3375d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3376d9ae7f2bSJakub Kicinski { 3377e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 3378d9ae7f2bSJakub Kicinski 3379d9ae7f2bSJakub Kicinski return 0; 3380d9ae7f2bSJakub Kicinski } 3381d9ae7f2bSJakub Kicinski 3382389f263bSQuentin Monnet static int 3383389f263bSQuentin Monnet nfp_subprog_epilogue(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3384389f263bSQuentin Monnet { 338544549623SQuentin Monnet if (nfp_prog->subprog[meta->subprog_idx].needs_reg_push) { 3386389f263bSQuentin Monnet /* Pop R6~R9 to the stack via related subroutine. 338744549623SQuentin Monnet * We loaded the return address to the caller into ret_reg(). 338844549623SQuentin Monnet * This means that the subroutine does not come back here, we 338944549623SQuentin Monnet * make it jump back to the subprogram caller directly! 3390389f263bSQuentin Monnet */ 3391389f263bSQuentin Monnet emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 1, 3392389f263bSQuentin Monnet RELO_BR_GO_CALL_POP_REGS); 339344549623SQuentin Monnet /* Pop return address from the stack. */ 3394389f263bSQuentin Monnet wrp_mov(nfp_prog, ret_reg(nfp_prog), reg_lm(0, 0)); 339544549623SQuentin Monnet } else { 339644549623SQuentin Monnet /* Pop return address from the stack. */ 339744549623SQuentin Monnet wrp_mov(nfp_prog, ret_reg(nfp_prog), reg_lm(0, 0)); 339844549623SQuentin Monnet /* Jump back to caller if no callee-saved registers were used 339944549623SQuentin Monnet * by the subprogram. 340044549623SQuentin Monnet */ 340144549623SQuentin Monnet emit_rtn(nfp_prog, ret_reg(nfp_prog), 0); 340244549623SQuentin Monnet } 3403389f263bSQuentin Monnet 3404389f263bSQuentin Monnet return 0; 3405389f263bSQuentin Monnet } 3406389f263bSQuentin Monnet 3407389f263bSQuentin Monnet static int jmp_exit(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3408389f263bSQuentin Monnet { 3409389f263bSQuentin Monnet if (nfp_is_main_function(meta)) 3410389f263bSQuentin Monnet return goto_out(nfp_prog, meta); 3411389f263bSQuentin Monnet else 3412389f263bSQuentin Monnet return nfp_subprog_epilogue(nfp_prog, meta); 3413389f263bSQuentin Monnet } 3414389f263bSQuentin Monnet 3415d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 3416d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 3417d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 3418d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 3419d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 3420d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 3421d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 3422d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 3423d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 3424d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 3425d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 3426d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 3427d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 3428d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_X] = mul_reg64, 3429d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_K] = mul_imm64, 34302a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_X] = div_reg64, 34312a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_K] = div_imm64, 3432254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 3433991f5b36SJiong Wang [BPF_ALU64 | BPF_LSH | BPF_X] = shl_reg64, 3434d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 3435991f5b36SJiong Wang [BPF_ALU64 | BPF_RSH | BPF_X] = shr_reg64, 3436d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 3437c217abccSJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_X] = ashr_reg64, 3438f43d0f17SJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_K] = ashr_imm64, 3439d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 3440d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 3441d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 3442d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 3443d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 3444d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 3445d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 3446d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 3447d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 3448d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 3449d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 3450d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 3451d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_X] = mul_reg, 3452d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_K] = mul_imm, 34532a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_X] = div_reg, 34542a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_K] = div_imm, 3455254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 3456ac7a1717SJiong Wang [BPF_ALU | BPF_LSH | BPF_X] = shl_reg, 3457d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 3458ac7a1717SJiong Wang [BPF_ALU | BPF_RSH | BPF_X] = shr_reg, 3459ac7a1717SJiong Wang [BPF_ALU | BPF_RSH | BPF_K] = shr_imm, 346084708c13SJiong Wang [BPF_ALU | BPF_ARSH | BPF_X] = ashr_reg, 346184708c13SJiong Wang [BPF_ALU | BPF_ARSH | BPF_K] = ashr_imm, 34623119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 3463d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 3464d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 3465d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 3466d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 3467d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 3468d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 3469d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 34702ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 34712ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 3472d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 34732ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 3474e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 3475e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 3476d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 3477e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 3478dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 3479dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 3480e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 3481e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 3482e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 3483e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 3484d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 3485d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 348661dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = cmp_imm, 348761dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = cmp_imm, 348861dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_K] = cmp_imm, 348961dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_K] = cmp_imm, 349061dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_K] = cmp_imm, 349161dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_K] = cmp_imm, 349261dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_K] = cmp_imm, 349361dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_K] = cmp_imm, 3494d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 3495d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 3496d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 349761dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = cmp_reg, 349861dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = cmp_reg, 349961dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_X] = cmp_reg, 350061dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_X] = cmp_reg, 350161dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_X] = cmp_reg, 350261dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_X] = cmp_reg, 350361dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_X] = cmp_reg, 350461dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_X] = cmp_reg, 3505d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 3506d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 350746144839SJiong Wang [BPF_JMP32 | BPF_JEQ | BPF_K] = jeq32_imm, 350846144839SJiong Wang [BPF_JMP32 | BPF_JGT | BPF_K] = cmp_imm, 350946144839SJiong Wang [BPF_JMP32 | BPF_JGE | BPF_K] = cmp_imm, 351046144839SJiong Wang [BPF_JMP32 | BPF_JLT | BPF_K] = cmp_imm, 351146144839SJiong Wang [BPF_JMP32 | BPF_JLE | BPF_K] = cmp_imm, 351246144839SJiong Wang [BPF_JMP32 | BPF_JSGT | BPF_K] =cmp_imm, 351346144839SJiong Wang [BPF_JMP32 | BPF_JSGE | BPF_K] =cmp_imm, 351446144839SJiong Wang [BPF_JMP32 | BPF_JSLT | BPF_K] =cmp_imm, 351546144839SJiong Wang [BPF_JMP32 | BPF_JSLE | BPF_K] =cmp_imm, 351646144839SJiong Wang [BPF_JMP32 | BPF_JSET | BPF_K] =jset_imm, 351746144839SJiong Wang [BPF_JMP32 | BPF_JNE | BPF_K] = jne_imm, 351846144839SJiong Wang [BPF_JMP32 | BPF_JEQ | BPF_X] = jeq_reg, 351946144839SJiong Wang [BPF_JMP32 | BPF_JGT | BPF_X] = cmp_reg, 352046144839SJiong Wang [BPF_JMP32 | BPF_JGE | BPF_X] = cmp_reg, 352146144839SJiong Wang [BPF_JMP32 | BPF_JLT | BPF_X] = cmp_reg, 352246144839SJiong Wang [BPF_JMP32 | BPF_JLE | BPF_X] = cmp_reg, 352346144839SJiong Wang [BPF_JMP32 | BPF_JSGT | BPF_X] =cmp_reg, 352446144839SJiong Wang [BPF_JMP32 | BPF_JSGE | BPF_X] =cmp_reg, 352546144839SJiong Wang [BPF_JMP32 | BPF_JSLT | BPF_X] =cmp_reg, 352646144839SJiong Wang [BPF_JMP32 | BPF_JSLE | BPF_X] =cmp_reg, 352746144839SJiong Wang [BPF_JMP32 | BPF_JSET | BPF_X] =jset_reg, 352846144839SJiong Wang [BPF_JMP32 | BPF_JNE | BPF_X] = jne_reg, 35292cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 3530389f263bSQuentin Monnet [BPF_JMP | BPF_EXIT] = jmp_exit, 3531d9ae7f2bSJakub Kicinski }; 3532d9ae7f2bSJakub Kicinski 3533d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 35342178f3f0SQuentin Monnet static int 35352178f3f0SQuentin Monnet nfp_fixup_immed_relo(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 35362178f3f0SQuentin Monnet struct nfp_insn_meta *jmp_dst, u32 br_idx) 35372178f3f0SQuentin Monnet { 35382178f3f0SQuentin Monnet if (immed_get_value(nfp_prog->prog[br_idx + 1])) { 35392178f3f0SQuentin Monnet pr_err("BUG: failed to fix up callee register saving\n"); 35402178f3f0SQuentin Monnet return -EINVAL; 35412178f3f0SQuentin Monnet } 35422178f3f0SQuentin Monnet 35432178f3f0SQuentin Monnet immed_set_value(&nfp_prog->prog[br_idx + 1], jmp_dst->off); 35442178f3f0SQuentin Monnet 35452178f3f0SQuentin Monnet return 0; 35462178f3f0SQuentin Monnet } 35472178f3f0SQuentin Monnet 3548d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 3549d9ae7f2bSJakub Kicinski { 35505b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 3551854dc87dSJiong Wang u32 idx, br_idx; 35522178f3f0SQuentin Monnet int err; 3553d9ae7f2bSJakub Kicinski 3554854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 355591a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) 3556d9ae7f2bSJakub Kicinski continue; 355746144839SJiong Wang if (!is_mbpf_jmp(meta)) 3558d9ae7f2bSJakub Kicinski continue; 3559bdf4c66fSQuentin Monnet if (meta->insn.code == (BPF_JMP | BPF_EXIT) && 3560bdf4c66fSQuentin Monnet !nfp_is_main_function(meta)) 3561bdf4c66fSQuentin Monnet continue; 3562bdf4c66fSQuentin Monnet if (is_mbpf_helper_call(meta)) 3563bdf4c66fSQuentin Monnet continue; 3564d9ae7f2bSJakub Kicinski 35655b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 35662314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 35675b674140SJiong Wang else 35682314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 3569854dc87dSJiong Wang 3570bdf4c66fSQuentin Monnet /* For BPF-to-BPF function call, a stack adjustment sequence is 3571bdf4c66fSQuentin Monnet * generated after the return instruction. Therefore, we must 3572bdf4c66fSQuentin Monnet * withdraw the length of this sequence to have br_idx pointing 3573bdf4c66fSQuentin Monnet * to where the "branch" NFP instruction is expected to be. 3574bdf4c66fSQuentin Monnet */ 3575bdf4c66fSQuentin Monnet if (is_mbpf_pseudo_call(meta)) 3576bdf4c66fSQuentin Monnet br_idx -= meta->num_insns_after_br; 3577bdf4c66fSQuentin Monnet 3578d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 3579d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 3580d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 3581d9ae7f2bSJakub Kicinski return -ELOOP; 3582d9ae7f2bSJakub Kicinski } 3583bdf4c66fSQuentin Monnet 3584bdf4c66fSQuentin Monnet if (meta->insn.code == (BPF_JMP | BPF_EXIT)) 3585bdf4c66fSQuentin Monnet continue; 3586bdf4c66fSQuentin Monnet 3587d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 35882314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 35892178f3f0SQuentin Monnet RELO_BR_REL && !is_mbpf_pseudo_call(meta)) 3590d9ae7f2bSJakub Kicinski continue; 3591d9ae7f2bSJakub Kicinski 35925b674140SJiong Wang if (!meta->jmp_dst) { 35935b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 3594d9ae7f2bSJakub Kicinski return -ELOOP; 3595d9ae7f2bSJakub Kicinski } 3596d9ae7f2bSJakub Kicinski 35975b674140SJiong Wang jmp_dst = meta->jmp_dst; 3598854dc87dSJiong Wang 359991a87a58SJakub Kicinski if (jmp_dst->flags & FLAG_INSN_SKIP_PREC_DEPENDENT) { 3600d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 3601d9ae7f2bSJakub Kicinski return -ELOOP; 3602d9ae7f2bSJakub Kicinski } 3603d9ae7f2bSJakub Kicinski 360444549623SQuentin Monnet if (is_mbpf_pseudo_call(meta) && 360544549623SQuentin Monnet nfp_prog->subprog[jmp_dst->subprog_idx].needs_reg_push) { 36062178f3f0SQuentin Monnet err = nfp_fixup_immed_relo(nfp_prog, meta, 36072178f3f0SQuentin Monnet jmp_dst, br_idx); 36082178f3f0SQuentin Monnet if (err) 36092178f3f0SQuentin Monnet return err; 36102178f3f0SQuentin Monnet } 36112178f3f0SQuentin Monnet 36122178f3f0SQuentin Monnet if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 36132178f3f0SQuentin Monnet RELO_BR_REL) 36142178f3f0SQuentin Monnet continue; 36152178f3f0SQuentin Monnet 36162314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 3617d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 3618d9ae7f2bSJakub Kicinski continue; 36195b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 3620d9ae7f2bSJakub Kicinski } 3621d9ae7f2bSJakub Kicinski } 3622d9ae7f2bSJakub Kicinski 3623d9ae7f2bSJakub Kicinski return 0; 3624d9ae7f2bSJakub Kicinski } 3625d9ae7f2bSJakub Kicinski 3626d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 3627d9ae7f2bSJakub Kicinski { 362818e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 362918e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 363018e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 3631d9ae7f2bSJakub Kicinski } 3632d9ae7f2bSJakub Kicinski 3633389f263bSQuentin Monnet static void 3634389f263bSQuentin Monnet nfp_subprog_prologue(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3635389f263bSQuentin Monnet { 3636389f263bSQuentin Monnet /* Save return address into the stack. */ 3637389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_lm(0, 0), ret_reg(nfp_prog)); 3638389f263bSQuentin Monnet } 3639389f263bSQuentin Monnet 3640389f263bSQuentin Monnet static void 3641389f263bSQuentin Monnet nfp_start_subprog(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3642389f263bSQuentin Monnet { 3643389f263bSQuentin Monnet unsigned int depth = nfp_prog->subprog[meta->subprog_idx].stack_depth; 3644389f263bSQuentin Monnet 3645389f263bSQuentin Monnet nfp_prog->stack_frame_depth = round_up(depth, 4); 3646389f263bSQuentin Monnet nfp_subprog_prologue(nfp_prog, meta); 3647389f263bSQuentin Monnet } 3648389f263bSQuentin Monnet 3649389f263bSQuentin Monnet bool nfp_is_subprog_start(struct nfp_insn_meta *meta) 3650389f263bSQuentin Monnet { 3651389f263bSQuentin Monnet return meta->flags & FLAG_INSN_IS_SUBPROG_START; 3652389f263bSQuentin Monnet } 3653389f263bSQuentin Monnet 3654d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 3655d9ae7f2bSJakub Kicinski { 3656d9ae7f2bSJakub Kicinski /* TC direct-action mode: 3657d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 3658d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 3659d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 3660d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 3661d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 3662d9ae7f2bSJakub Kicinski * 3663d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 3664d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 3665d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 3666d9ae7f2bSJakub Kicinski * packets up the stack. 3667d9ae7f2bSJakub Kicinski */ 3668d9ae7f2bSJakub Kicinski /* Target for aborts */ 3669d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3670d9ae7f2bSJakub Kicinski 3671e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3672d9ae7f2bSJakub Kicinski 3673c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3674d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 3675d9ae7f2bSJakub Kicinski 3676d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3677d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3678d9ae7f2bSJakub Kicinski 3679d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 3680d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 3681d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3682c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3683d9ae7f2bSJakub Kicinski 3684d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 3685d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 3686d9ae7f2bSJakub Kicinski 3687d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3688d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 3689d9ae7f2bSJakub Kicinski 3690d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3691d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 3692d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3693d9ae7f2bSJakub Kicinski 3694d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3695d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3696d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 3697d9ae7f2bSJakub Kicinski 3698e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3699d9ae7f2bSJakub Kicinski 3700d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3701d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 3702d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3703d9ae7f2bSJakub Kicinski } 3704d9ae7f2bSJakub Kicinski 3705d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 3706d9ae7f2bSJakub Kicinski { 3707d9ae7f2bSJakub Kicinski /* XDP return codes: 3708d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 3709d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 3710d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 3711d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 3712d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 3713d9ae7f2bSJakub Kicinski */ 3714d9ae7f2bSJakub Kicinski /* Target for aborts */ 3715d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3716d9ae7f2bSJakub Kicinski 3717e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3718d9ae7f2bSJakub Kicinski 3719c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3720d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 3721d9ae7f2bSJakub Kicinski 3722d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3723d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3724d9ae7f2bSJakub Kicinski 3725d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 3726d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 3727d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3728d9ae7f2bSJakub Kicinski 3729d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 3730d9ae7f2bSJakub Kicinski 3731d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3732d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 3733d9ae7f2bSJakub Kicinski 3734d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3735d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3736d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3737d9ae7f2bSJakub Kicinski 3738e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3739d9ae7f2bSJakub Kicinski 3740c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3741d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3742d9ae7f2bSJakub Kicinski } 3743d9ae7f2bSJakub Kicinski 374444549623SQuentin Monnet static bool nfp_prog_needs_callee_reg_save(struct nfp_prog *nfp_prog) 374544549623SQuentin Monnet { 374644549623SQuentin Monnet unsigned int idx; 374744549623SQuentin Monnet 374844549623SQuentin Monnet for (idx = 1; idx < nfp_prog->subprog_cnt; idx++) 374944549623SQuentin Monnet if (nfp_prog->subprog[idx].needs_reg_push) 375044549623SQuentin Monnet return true; 375144549623SQuentin Monnet 375244549623SQuentin Monnet return false; 375344549623SQuentin Monnet } 375444549623SQuentin Monnet 3755389f263bSQuentin Monnet static void nfp_push_callee_registers(struct nfp_prog *nfp_prog) 3756389f263bSQuentin Monnet { 3757389f263bSQuentin Monnet u8 reg; 3758389f263bSQuentin Monnet 3759389f263bSQuentin Monnet /* Subroutine: Save all callee saved registers (R6 ~ R9). 3760389f263bSQuentin Monnet * imm_b() holds the return address. 3761389f263bSQuentin Monnet */ 3762389f263bSQuentin Monnet nfp_prog->tgt_call_push_regs = nfp_prog_current_offset(nfp_prog); 3763389f263bSQuentin Monnet for (reg = BPF_REG_6; reg <= BPF_REG_9; reg++) { 3764389f263bSQuentin Monnet u8 adj = (reg - BPF_REG_0) * 2; 3765389f263bSQuentin Monnet u8 idx = (reg - BPF_REG_6) * 2; 3766389f263bSQuentin Monnet 3767389f263bSQuentin Monnet /* The first slot in the stack frame is used to push the return 3768389f263bSQuentin Monnet * address in bpf_to_bpf_call(), start just after. 3769389f263bSQuentin Monnet */ 3770389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_lm(0, 1 + idx), reg_b(adj)); 3771389f263bSQuentin Monnet 3772389f263bSQuentin Monnet if (reg == BPF_REG_8) 3773389f263bSQuentin Monnet /* Prepare to jump back, last 3 insns use defer slots */ 3774389f263bSQuentin Monnet emit_rtn(nfp_prog, imm_b(nfp_prog), 3); 3775389f263bSQuentin Monnet 3776389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_lm(0, 1 + idx + 1), reg_b(adj + 1)); 3777389f263bSQuentin Monnet } 3778389f263bSQuentin Monnet } 3779389f263bSQuentin Monnet 3780389f263bSQuentin Monnet static void nfp_pop_callee_registers(struct nfp_prog *nfp_prog) 3781389f263bSQuentin Monnet { 3782389f263bSQuentin Monnet u8 reg; 3783389f263bSQuentin Monnet 3784389f263bSQuentin Monnet /* Subroutine: Restore all callee saved registers (R6 ~ R9). 3785389f263bSQuentin Monnet * ret_reg() holds the return address. 3786389f263bSQuentin Monnet */ 3787389f263bSQuentin Monnet nfp_prog->tgt_call_pop_regs = nfp_prog_current_offset(nfp_prog); 3788389f263bSQuentin Monnet for (reg = BPF_REG_6; reg <= BPF_REG_9; reg++) { 3789389f263bSQuentin Monnet u8 adj = (reg - BPF_REG_0) * 2; 3790389f263bSQuentin Monnet u8 idx = (reg - BPF_REG_6) * 2; 3791389f263bSQuentin Monnet 3792389f263bSQuentin Monnet /* The first slot in the stack frame holds the return address, 3793389f263bSQuentin Monnet * start popping just after that. 3794389f263bSQuentin Monnet */ 3795389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_both(adj), reg_lm(0, 1 + idx)); 3796389f263bSQuentin Monnet 3797389f263bSQuentin Monnet if (reg == BPF_REG_8) 3798389f263bSQuentin Monnet /* Prepare to jump back, last 3 insns use defer slots */ 3799389f263bSQuentin Monnet emit_rtn(nfp_prog, ret_reg(nfp_prog), 3); 3800389f263bSQuentin Monnet 3801389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_both(adj + 1), reg_lm(0, 1 + idx + 1)); 3802389f263bSQuentin Monnet } 3803389f263bSQuentin Monnet } 3804389f263bSQuentin Monnet 3805d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 3806d9ae7f2bSJakub Kicinski { 3807012bb8a8SJakub Kicinski switch (nfp_prog->type) { 3808012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 3809d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 3810d9ae7f2bSJakub Kicinski break; 3811012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 3812d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 3813d9ae7f2bSJakub Kicinski break; 3814012bb8a8SJakub Kicinski default: 3815012bb8a8SJakub Kicinski WARN_ON(1); 3816d9ae7f2bSJakub Kicinski } 3817389f263bSQuentin Monnet 381844549623SQuentin Monnet if (!nfp_prog_needs_callee_reg_save(nfp_prog)) 3819389f263bSQuentin Monnet return; 3820389f263bSQuentin Monnet 3821389f263bSQuentin Monnet nfp_push_callee_registers(nfp_prog); 3822389f263bSQuentin Monnet nfp_pop_callee_registers(nfp_prog); 3823d9ae7f2bSJakub Kicinski } 3824d9ae7f2bSJakub Kicinski 3825d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 3826d9ae7f2bSJakub Kicinski { 3827d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3828389f263bSQuentin Monnet unsigned int depth; 3829ff42bb9fSJakub Kicinski int err; 3830d9ae7f2bSJakub Kicinski 3831389f263bSQuentin Monnet depth = nfp_prog->subprog[0].stack_depth; 3832389f263bSQuentin Monnet nfp_prog->stack_frame_depth = round_up(depth, 4); 3833389f263bSQuentin Monnet 3834d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 3835d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3836d9ae7f2bSJakub Kicinski return nfp_prog->error; 3837d9ae7f2bSJakub Kicinski 3838d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3839d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 3840d9ae7f2bSJakub Kicinski 3841d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 3842d9ae7f2bSJakub Kicinski 3843389f263bSQuentin Monnet if (nfp_is_subprog_start(meta)) { 3844389f263bSQuentin Monnet nfp_start_subprog(nfp_prog, meta); 3845389f263bSQuentin Monnet if (nfp_prog->error) 3846389f263bSQuentin Monnet return nfp_prog->error; 3847389f263bSQuentin Monnet } 3848389f263bSQuentin Monnet 384991a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) { 3850d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3851d9ae7f2bSJakub Kicinski continue; 3852d9ae7f2bSJakub Kicinski } 3853d9ae7f2bSJakub Kicinski 3854d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 3855d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 3856d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 3857d9ae7f2bSJakub Kicinski if (!cb) 3858d9ae7f2bSJakub Kicinski return -ENOENT; 3859d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 3860d9ae7f2bSJakub Kicinski if (err) 3861d9ae7f2bSJakub Kicinski return err; 3862e8a4796eSJakub Kicinski if (nfp_prog->error) 3863e8a4796eSJakub Kicinski return nfp_prog->error; 3864d9ae7f2bSJakub Kicinski 3865d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3866d9ae7f2bSJakub Kicinski } 3867d9ae7f2bSJakub Kicinski 3868854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 3869854dc87dSJiong Wang 3870d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 3871d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3872d9ae7f2bSJakub Kicinski return nfp_prog->error; 3873d9ae7f2bSJakub Kicinski 3874ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 38751c03e03fSJakub Kicinski if (nfp_prog->error) 38761c03e03fSJakub Kicinski return nfp_prog->error; 38771c03e03fSJakub Kicinski 3878d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 3879d9ae7f2bSJakub Kicinski } 3880d9ae7f2bSJakub Kicinski 3881d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 3882d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 3883d9ae7f2bSJakub Kicinski { 3884d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3885d9ae7f2bSJakub Kicinski 3886d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3887d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 3888d9ae7f2bSJakub Kicinski 3889d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 3890d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 3891d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 3892d9ae7f2bSJakub Kicinski continue; 3893d9ae7f2bSJakub Kicinski 3894d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 3895d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 3896d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 389791a87a58SJakub Kicinski meta->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 3898d9ae7f2bSJakub Kicinski 3899d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 390091a87a58SJakub Kicinski if (!(meta->flags & FLAG_INSN_SKIP_MASK)) 3901d9ae7f2bSJakub Kicinski return; 3902d9ae7f2bSJakub Kicinski } 3903d9ae7f2bSJakub Kicinski } 3904d9ae7f2bSJakub Kicinski 39056c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 39066c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 39076c59500cSJakub Kicinski */ 39086c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 39096c59500cSJakub Kicinski { 39106c59500cSJakub Kicinski struct nfp_insn_meta *meta; 39116c59500cSJakub Kicinski 39126c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 39136c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 39146c59500cSJakub Kicinski 391591a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) 39166c59500cSJakub Kicinski continue; 39176c59500cSJakub Kicinski 391846144839SJiong Wang if (!is_mbpf_alu(meta) && !is_mbpf_jmp(meta)) 39196c59500cSJakub Kicinski continue; 39206c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 39216c59500cSJakub Kicinski continue; 39226c59500cSJakub Kicinski if (insn.imm >= 0) 39236c59500cSJakub Kicinski continue; 39246c59500cSJakub Kicinski 392546144839SJiong Wang if (is_mbpf_jmp(meta)) { 39267bdc97beSJakub Kicinski switch (BPF_OP(insn.code)) { 39277bdc97beSJakub Kicinski case BPF_JGE: 39287bdc97beSJakub Kicinski case BPF_JSGE: 39297bdc97beSJakub Kicinski case BPF_JLT: 39307bdc97beSJakub Kicinski case BPF_JSLT: 39317bdc97beSJakub Kicinski meta->jump_neg_op = true; 39327bdc97beSJakub Kicinski break; 39337bdc97beSJakub Kicinski default: 39347bdc97beSJakub Kicinski continue; 39357bdc97beSJakub Kicinski } 39367bdc97beSJakub Kicinski } else { 39376c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 39386c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 39396c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 39406c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 39416c59500cSJakub Kicinski else 39426c59500cSJakub Kicinski continue; 39436c59500cSJakub Kicinski 39446c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 39457bdc97beSJakub Kicinski } 39466c59500cSJakub Kicinski 39476c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 39486c59500cSJakub Kicinski } 39496c59500cSJakub Kicinski } 39506c59500cSJakub Kicinski 3951d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 3952d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 3953d9ae7f2bSJakub Kicinski { 3954d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3955155283c3SColin Ian King static const s32 exp_mask[] = { 3956d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 3957d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 3958d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 3959d9ae7f2bSJakub Kicinski }; 3960d9ae7f2bSJakub Kicinski 3961d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3962d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 3963d9ae7f2bSJakub Kicinski 3964d9ae7f2bSJakub Kicinski insn = meta1->insn; 3965d9ae7f2bSJakub Kicinski next = meta2->insn; 3966d9ae7f2bSJakub Kicinski 3967d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3968d9ae7f2bSJakub Kicinski continue; 3969d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3970d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3971d9ae7f2bSJakub Kicinski continue; 3972d9ae7f2bSJakub Kicinski 3973d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 3974d9ae7f2bSJakub Kicinski continue; 3975d9ae7f2bSJakub Kicinski 3976d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 3977d9ae7f2bSJakub Kicinski continue; 3978d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 3979d9ae7f2bSJakub Kicinski continue; 3980d9ae7f2bSJakub Kicinski 3981d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 3982d9ae7f2bSJakub Kicinski continue; 3983d9ae7f2bSJakub Kicinski 39841266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 39851266f5d6SJiong Wang continue; 39861266f5d6SJiong Wang 398791a87a58SJakub Kicinski meta2->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 3988d9ae7f2bSJakub Kicinski } 3989d9ae7f2bSJakub Kicinski } 3990d9ae7f2bSJakub Kicinski 3991d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 3992d9ae7f2bSJakub Kicinski { 3993d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 3994d9ae7f2bSJakub Kicinski 3995d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 3996d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 3997d9ae7f2bSJakub Kicinski 3998d9ae7f2bSJakub Kicinski insn = meta1->insn; 3999d9ae7f2bSJakub Kicinski next1 = meta2->insn; 4000d9ae7f2bSJakub Kicinski next2 = meta3->insn; 4001d9ae7f2bSJakub Kicinski 4002d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 4003d9ae7f2bSJakub Kicinski continue; 4004d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 4005d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 4006d9ae7f2bSJakub Kicinski continue; 4007d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 4008d9ae7f2bSJakub Kicinski continue; 4009d9ae7f2bSJakub Kicinski 4010d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 4011d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 4012d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 4013d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 4014d9ae7f2bSJakub Kicinski continue; 4015d9ae7f2bSJakub Kicinski 4016d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 4017d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 4018d9ae7f2bSJakub Kicinski continue; 4019d9ae7f2bSJakub Kicinski 4020d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 4021d9ae7f2bSJakub Kicinski continue; 4022d9ae7f2bSJakub Kicinski 402329fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 402429fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 402529fe46efSJiong Wang continue; 402629fe46efSJiong Wang 402791a87a58SJakub Kicinski meta2->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 402891a87a58SJakub Kicinski meta3->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 4029d9ae7f2bSJakub Kicinski } 4030d9ae7f2bSJakub Kicinski } 4031d9ae7f2bSJakub Kicinski 40326bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 40336bc7103cSJiong Wang * 40346bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 40356bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 40366bc7103cSJiong Wang * 40376bc7103cSJiong Wang * The destination register of load and source register of store should 40386bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 40396bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 40406bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 40416bc7103cSJiong Wang */ 40426bc7103cSJiong Wang static bool 40436bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 40446bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 40456bc7103cSJiong Wang { 40466bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 40476bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 40486bc7103cSJiong Wang 40496bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 40506bc7103cSJiong Wang return false; 40516bc7103cSJiong Wang 4052cc0dff6dSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET && 4053cc0dff6dSJiong Wang ld_meta->ptr.type != PTR_TO_MAP_VALUE) 40546bc7103cSJiong Wang return false; 40556bc7103cSJiong Wang 40566bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 40576bc7103cSJiong Wang return false; 40586bc7103cSJiong Wang 40596bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 40606bc7103cSJiong Wang return false; 40616bc7103cSJiong Wang 40626bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 40636bc7103cSJiong Wang return false; 40646bc7103cSJiong Wang 40656bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 40666bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 40676bc7103cSJiong Wang return false; 40686bc7103cSJiong Wang 40696bc7103cSJiong Wang return true; 40706bc7103cSJiong Wang } 40716bc7103cSJiong Wang 40726bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 40736bc7103cSJiong Wang * 40746bc7103cSJiong Wang * - Their address base registers are the same. 40756bc7103cSJiong Wang * - Their address offsets are in the same order. 40766bc7103cSJiong Wang * - They operate at the same memory width. 40776bc7103cSJiong Wang * - There is no jump into the middle of them. 40786bc7103cSJiong Wang */ 40796bc7103cSJiong Wang static bool 40806bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 40816bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 40826bc7103cSJiong Wang struct bpf_insn *prev_ld, 40836bc7103cSJiong Wang struct bpf_insn *prev_st) 40846bc7103cSJiong Wang { 40856bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 40866bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 40876bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 40886bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 40896bc7103cSJiong Wang 40906bc7103cSJiong Wang /* This pair is the start pair. */ 40916bc7103cSJiong Wang if (!prev_ld) 40926bc7103cSJiong Wang return true; 40936bc7103cSJiong Wang 40946bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 40956bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 40966bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 40976bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 40986bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 40996bc7103cSJiong Wang prev_ld_off = prev_ld->off; 41006bc7103cSJiong Wang prev_st_off = prev_st->off; 41016bc7103cSJiong Wang 41026bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 41036bc7103cSJiong Wang return false; 41046bc7103cSJiong Wang 41056bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 41066bc7103cSJiong Wang return false; 41076bc7103cSJiong Wang 41086bc7103cSJiong Wang if (curr_size != prev_size) 41096bc7103cSJiong Wang return false; 41106bc7103cSJiong Wang 41116bc7103cSJiong Wang /* There is jump to the head of this pair. */ 41126bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 41136bc7103cSJiong Wang return false; 41146bc7103cSJiong Wang 41156bc7103cSJiong Wang /* Both in ascending order. */ 41166bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 41176bc7103cSJiong Wang prev_st_off + prev_size == st->off) 41186bc7103cSJiong Wang return true; 41196bc7103cSJiong Wang 41206bc7103cSJiong Wang /* Both in descending order. */ 41216bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 41226bc7103cSJiong Wang st->off + curr_size == prev_st_off) 41236bc7103cSJiong Wang return true; 41246bc7103cSJiong Wang 41256bc7103cSJiong Wang return false; 41266bc7103cSJiong Wang } 41276bc7103cSJiong Wang 41286bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 41296bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 41306bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 41316bc7103cSJiong Wang * as an memory copy. 41326bc7103cSJiong Wang */ 41336bc7103cSJiong Wang static bool 41346bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 41356bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 41366bc7103cSJiong Wang { 41376bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 41386bc7103cSJiong Wang 41396bc7103cSJiong Wang /* Different pointer types does not overlap. */ 41406bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 41416bc7103cSJiong Wang return false; 41426bc7103cSJiong Wang 41436bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 41446bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 41456bc7103cSJiong Wang return true; 41466bc7103cSJiong Wang 41476bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 41486bc7103cSJiong Wang * base register. 41496bc7103cSJiong Wang */ 41506bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 41516bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 41526bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 41536bc7103cSJiong Wang 41546bc7103cSJiong Wang /* Ascending order cross. */ 41556bc7103cSJiong Wang if (ld_off > head_ld_off && 41566bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 41576bc7103cSJiong Wang return true; 41586bc7103cSJiong Wang 41596bc7103cSJiong Wang /* Descending order cross. */ 41606bc7103cSJiong Wang if (ld_off < head_ld_off && 41616bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 41626bc7103cSJiong Wang return true; 41636bc7103cSJiong Wang 41646bc7103cSJiong Wang return false; 41656bc7103cSJiong Wang } 41666bc7103cSJiong Wang 41676bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 41686bc7103cSJiong Wang * 41696bc7103cSJiong Wang * load R, [regA + offA] 41706bc7103cSJiong Wang * store [regB + offB], R 41716bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 41726bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 41736bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 41746bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 41756bc7103cSJiong Wang * ... 41766bc7103cSJiong Wang * 41776bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 41786bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 41796bc7103cSJiong Wang */ 41806bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 41816bc7103cSJiong Wang { 41826bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 41836bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 41846bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 41856bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 41866bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 41876bc7103cSJiong Wang u8 count = 0; 41886bc7103cSJiong Wang 41896bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 41906bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 41916bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 41926bc7103cSJiong Wang 41936bc7103cSJiong Wang /* Reset record status if any of the following if true: 41946bc7103cSJiong Wang * - The current insn pair is not load/store. 41956bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 41966bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 41976bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 41986bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 41996bc7103cSJiong Wang * single NFP CPP command can transfer. 42006bc7103cSJiong Wang */ 42016bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 42026bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 42036bc7103cSJiong Wang prev_st) || 42046bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 42056bc7103cSJiong Wang head_st_meta) || 42066bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 42076bc7103cSJiong Wang if (!count) 42086bc7103cSJiong Wang continue; 42096bc7103cSJiong Wang 42106bc7103cSJiong Wang if (count > 1) { 42116bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 42126bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 42136bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 42146bc7103cSJiong Wang 42156bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 42166bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 42176bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 42186bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 42196bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 42206bc7103cSJiong Wang } 42216bc7103cSJiong Wang 42226bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 422391a87a58SJakub Kicinski head_st_meta->flags |= 422491a87a58SJakub Kicinski FLAG_INSN_SKIP_PREC_DEPENDENT; 42256bc7103cSJiong Wang } else { 42266bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 42276bc7103cSJiong Wang } 42286bc7103cSJiong Wang 42296bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 42306bc7103cSJiong Wang * could serve as the new head of the the next chain. 42316bc7103cSJiong Wang */ 42326bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 42336bc7103cSJiong Wang head_ld_meta = meta1; 42346bc7103cSJiong Wang head_st_meta = meta2; 42356bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 42366bc7103cSJiong Wang BPF_LDST_BYTES(ld); 42376bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 42386bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 42396bc7103cSJiong Wang prev_ld = ld; 42406bc7103cSJiong Wang prev_st = st; 42416bc7103cSJiong Wang count = 1; 42426bc7103cSJiong Wang } else { 42436bc7103cSJiong Wang head_ld_meta = NULL; 42446bc7103cSJiong Wang head_st_meta = NULL; 42456bc7103cSJiong Wang prev_ld = NULL; 42466bc7103cSJiong Wang prev_st = NULL; 42476bc7103cSJiong Wang count = 0; 42486bc7103cSJiong Wang } 42496bc7103cSJiong Wang 42506bc7103cSJiong Wang continue; 42516bc7103cSJiong Wang } 42526bc7103cSJiong Wang 42536bc7103cSJiong Wang if (!head_ld_meta) { 42546bc7103cSJiong Wang head_ld_meta = meta1; 42556bc7103cSJiong Wang head_st_meta = meta2; 42566bc7103cSJiong Wang } else { 425791a87a58SJakub Kicinski meta1->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 425891a87a58SJakub Kicinski meta2->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 42596bc7103cSJiong Wang } 42606bc7103cSJiong Wang 42616bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 42626bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 42636bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 42646bc7103cSJiong Wang prev_ld = ld; 42656bc7103cSJiong Wang prev_st = st; 42666bc7103cSJiong Wang count++; 42676bc7103cSJiong Wang } 42686bc7103cSJiong Wang } 42696bc7103cSJiong Wang 427087b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 427187b10ecdSJiong Wang { 427287b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 427387b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 427487b10ecdSJiong Wang bool cache_avail = false; 427587b10ecdSJiong Wang struct bpf_insn *insn; 427687b10ecdSJiong Wang s32 range_ptr_off = 0; 427787b10ecdSJiong Wang u32 range_ptr_id = 0; 427887b10ecdSJiong Wang 427987b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 428087b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 428187b10ecdSJiong Wang cache_avail = false; 428287b10ecdSJiong Wang 428391a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) 428487b10ecdSJiong Wang continue; 428587b10ecdSJiong Wang 428687b10ecdSJiong Wang insn = &meta->insn; 428787b10ecdSJiong Wang 428887b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 428987b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 429087b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 429187b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 429287b10ecdSJiong Wang cache_avail = false; 429387b10ecdSJiong Wang continue; 429487b10ecdSJiong Wang } 429587b10ecdSJiong Wang 429687b10ecdSJiong Wang if (!is_mbpf_load(meta)) 429787b10ecdSJiong Wang continue; 429887b10ecdSJiong Wang 429987b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 430087b10ecdSJiong Wang cache_avail = false; 430187b10ecdSJiong Wang continue; 430287b10ecdSJiong Wang } 430387b10ecdSJiong Wang 430487b10ecdSJiong Wang if (!cache_avail) { 430587b10ecdSJiong Wang cache_avail = true; 430687b10ecdSJiong Wang if (range_node) 430787b10ecdSJiong Wang goto end_current_then_start_new; 430887b10ecdSJiong Wang goto start_new; 430987b10ecdSJiong Wang } 431087b10ecdSJiong Wang 431187b10ecdSJiong Wang /* Check ID to make sure two reads share the same 431287b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 431387b10ecdSJiong Wang * to make sure they also share the same constant 431487b10ecdSJiong Wang * offset. 431587b10ecdSJiong Wang * 431687b10ecdSJiong Wang * OFFs don't really need to be the same, because they 431787b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 431887b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 431987b10ecdSJiong Wang * offsets against original packet pointer. We don't 432087b10ecdSJiong Wang * support this. 432187b10ecdSJiong Wang */ 432287b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 432387b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 432487b10ecdSJiong Wang s16 new_start = range_start; 432587b10ecdSJiong Wang s16 end, off = insn->off; 432687b10ecdSJiong Wang s16 new_end = range_end; 432787b10ecdSJiong Wang bool changed = false; 432887b10ecdSJiong Wang 432987b10ecdSJiong Wang if (off < range_start) { 433087b10ecdSJiong Wang new_start = off; 433187b10ecdSJiong Wang changed = true; 433287b10ecdSJiong Wang } 433387b10ecdSJiong Wang 433487b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 433587b10ecdSJiong Wang if (end > range_end) { 433687b10ecdSJiong Wang new_end = end; 433787b10ecdSJiong Wang changed = true; 433887b10ecdSJiong Wang } 433987b10ecdSJiong Wang 434087b10ecdSJiong Wang if (!changed) 434187b10ecdSJiong Wang continue; 434287b10ecdSJiong Wang 434387b10ecdSJiong Wang if (new_end - new_start <= 64) { 434487b10ecdSJiong Wang /* Install new range. */ 434587b10ecdSJiong Wang range_start = new_start; 434687b10ecdSJiong Wang range_end = new_end; 434787b10ecdSJiong Wang continue; 434887b10ecdSJiong Wang } 434987b10ecdSJiong Wang } 435087b10ecdSJiong Wang 435187b10ecdSJiong Wang end_current_then_start_new: 435287b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 435387b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 435487b10ecdSJiong Wang start_new: 435587b10ecdSJiong Wang range_node = meta; 435687b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 435787b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 435887b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 435987b10ecdSJiong Wang range_start = insn->off; 436087b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 436187b10ecdSJiong Wang } 436287b10ecdSJiong Wang 436387b10ecdSJiong Wang if (range_node) { 436487b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 436587b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 436687b10ecdSJiong Wang } 436787b10ecdSJiong Wang 436887b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 436991a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) 437087b10ecdSJiong Wang continue; 437187b10ecdSJiong Wang 437287b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 437387b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 437487b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 437587b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 437687b10ecdSJiong Wang } else { 437787b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 437887b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 437987b10ecdSJiong Wang } 438087b10ecdSJiong Wang } 438187b10ecdSJiong Wang } 438287b10ecdSJiong Wang } 438387b10ecdSJiong Wang 4384d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 4385d9ae7f2bSJakub Kicinski { 4386d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 4387d9ae7f2bSJakub Kicinski 43886c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 4389d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 4390d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 43916bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 439287b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 4393d9ae7f2bSJakub Kicinski 4394d9ae7f2bSJakub Kicinski return 0; 4395d9ae7f2bSJakub Kicinski } 4396d9ae7f2bSJakub Kicinski 4397b4264c96SJakub Kicinski static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) 4398b4264c96SJakub Kicinski { 4399b4264c96SJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 4400b4264c96SJakub Kicinski struct nfp_bpf_map *nfp_map; 4401b4264c96SJakub Kicinski struct bpf_map *map; 4402ab01f4acSJakub Kicinski u32 id; 4403b4264c96SJakub Kicinski 4404b4264c96SJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 440591a87a58SJakub Kicinski if (meta1->flags & FLAG_INSN_SKIP_MASK || 440691a87a58SJakub Kicinski meta2->flags & FLAG_INSN_SKIP_MASK) 4407b4264c96SJakub Kicinski continue; 4408b4264c96SJakub Kicinski 4409b4264c96SJakub Kicinski if (meta1->insn.code != (BPF_LD | BPF_IMM | BPF_DW) || 4410b4264c96SJakub Kicinski meta1->insn.src_reg != BPF_PSEUDO_MAP_FD) 4411b4264c96SJakub Kicinski continue; 4412b4264c96SJakub Kicinski 4413b4264c96SJakub Kicinski map = (void *)(unsigned long)((u32)meta1->insn.imm | 4414b4264c96SJakub Kicinski (u64)meta2->insn.imm << 32); 4415ab01f4acSJakub Kicinski if (bpf_map_offload_neutral(map)) { 4416ab01f4acSJakub Kicinski id = map->id; 4417ab01f4acSJakub Kicinski } else { 4418b4264c96SJakub Kicinski nfp_map = map_to_offmap(map)->dev_priv; 4419ab01f4acSJakub Kicinski id = nfp_map->tid; 4420ab01f4acSJakub Kicinski } 4421b4264c96SJakub Kicinski 4422ab01f4acSJakub Kicinski meta1->insn.imm = id; 4423b4264c96SJakub Kicinski meta2->insn.imm = 0; 4424b4264c96SJakub Kicinski } 4425b4264c96SJakub Kicinski 4426b4264c96SJakub Kicinski return 0; 4427b4264c96SJakub Kicinski } 4428b4264c96SJakub Kicinski 44292314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 4430fd068ddcSJakub Kicinski { 44312314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 4432fd068ddcSJakub Kicinski int i; 4433fd068ddcSJakub Kicinski 44342314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 4435fd068ddcSJakub Kicinski int err; 4436fd068ddcSJakub Kicinski 44372314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 4438fd068ddcSJakub Kicinski if (err) 4439fd068ddcSJakub Kicinski return err; 4440fd068ddcSJakub Kicinski 44412314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 4442fd068ddcSJakub Kicinski } 4443fd068ddcSJakub Kicinski 4444fd068ddcSJakub Kicinski return 0; 4445fd068ddcSJakub Kicinski } 4446fd068ddcSJakub Kicinski 444744a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 444844a12eccSJakub Kicinski { 444944a12eccSJakub Kicinski void *prog; 445044a12eccSJakub Kicinski 445144a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 445244a12eccSJakub Kicinski if (!prog) 445344a12eccSJakub Kicinski return; 445444a12eccSJakub Kicinski 445544a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 445644a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 445744a12eccSJakub Kicinski kvfree(nfp_prog->prog); 445844a12eccSJakub Kicinski nfp_prog->prog = prog; 445944a12eccSJakub Kicinski } 446044a12eccSJakub Kicinski 4461c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 4462d9ae7f2bSJakub Kicinski { 4463d9ae7f2bSJakub Kicinski int ret; 4464d9ae7f2bSJakub Kicinski 4465b4264c96SJakub Kicinski ret = nfp_bpf_replace_map_ptrs(nfp_prog); 4466b4264c96SJakub Kicinski if (ret) 4467b4264c96SJakub Kicinski return ret; 4468b4264c96SJakub Kicinski 4469d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 4470d9ae7f2bSJakub Kicinski if (ret) 44719314c442SJakub Kicinski return ret; 4472d9ae7f2bSJakub Kicinski 4473d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 4474d9ae7f2bSJakub Kicinski if (ret) { 4475d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 4476d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 44779314c442SJakub Kicinski return -EINVAL; 4478d9ae7f2bSJakub Kicinski } 4479d9ae7f2bSJakub Kicinski 448044a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 448144a12eccSJakub Kicinski 44822314fe9eSJakub Kicinski return ret; 4483d9ae7f2bSJakub Kicinski } 44841549921dSJakub Kicinski 4485e2fc6114SJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog) 44861549921dSJakub Kicinski { 44871549921dSJakub Kicinski struct nfp_insn_meta *meta; 44881549921dSJakub Kicinski 44891549921dSJakub Kicinski /* Another pass to record jump information. */ 44901549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 44911549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 4492e3b49dc6SQuentin Monnet u64 code = meta->insn.code; 4493e3b49dc6SQuentin Monnet unsigned int dst_idx; 4494e3b49dc6SQuentin Monnet bool pseudo_call; 44951549921dSJakub Kicinski 449646144839SJiong Wang if (!is_mbpf_jmp(meta)) 4497e3b49dc6SQuentin Monnet continue; 4498e3b49dc6SQuentin Monnet if (BPF_OP(code) == BPF_EXIT) 4499e3b49dc6SQuentin Monnet continue; 4500e3b49dc6SQuentin Monnet if (is_mbpf_helper_call(meta)) 4501e3b49dc6SQuentin Monnet continue; 45021549921dSJakub Kicinski 4503e3b49dc6SQuentin Monnet /* If opcode is BPF_CALL at this point, this can only be a 4504e3b49dc6SQuentin Monnet * BPF-to-BPF call (a.k.a pseudo call). 4505e3b49dc6SQuentin Monnet */ 4506e3b49dc6SQuentin Monnet pseudo_call = BPF_OP(code) == BPF_CALL; 4507e3b49dc6SQuentin Monnet 4508e3b49dc6SQuentin Monnet if (pseudo_call) 4509e3b49dc6SQuentin Monnet dst_idx = meta->n + 1 + meta->insn.imm; 4510e3b49dc6SQuentin Monnet else 4511e3b49dc6SQuentin Monnet dst_idx = meta->n + 1 + meta->insn.off; 4512e3b49dc6SQuentin Monnet 4513e2fc6114SJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_idx); 4514e3b49dc6SQuentin Monnet 4515e3b49dc6SQuentin Monnet if (pseudo_call) 4516e3b49dc6SQuentin Monnet dst_meta->flags |= FLAG_INSN_IS_SUBPROG_START; 4517e3b49dc6SQuentin Monnet 45181549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 4519e3b49dc6SQuentin Monnet meta->jmp_dst = dst_meta; 45201549921dSJakub Kicinski } 45211549921dSJakub Kicinski } 45222314fe9eSJakub Kicinski 452374801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 452474801e50SQuentin Monnet { 452574801e50SQuentin Monnet return !!instr_cb[code]; 452674801e50SQuentin Monnet } 452774801e50SQuentin Monnet 45282314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 45292314fe9eSJakub Kicinski { 45302314fe9eSJakub Kicinski unsigned int i; 45312314fe9eSJakub Kicinski u64 *prog; 45322314fe9eSJakub Kicinski int err; 45332314fe9eSJakub Kicinski 45342314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 45352314fe9eSJakub Kicinski GFP_KERNEL); 45362314fe9eSJakub Kicinski if (!prog) 45372314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 45382314fe9eSJakub Kicinski 45392314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 45402314fe9eSJakub Kicinski enum nfp_relo_type special; 454177a3d311SJakub Kicinski u32 val; 4542389f263bSQuentin Monnet u16 off; 45432314fe9eSJakub Kicinski 45442314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 45452314fe9eSJakub Kicinski switch (special) { 45462314fe9eSJakub Kicinski case RELO_NONE: 45472314fe9eSJakub Kicinski continue; 45482314fe9eSJakub Kicinski case RELO_BR_REL: 45492314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 45502314fe9eSJakub Kicinski break; 45512314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 45522314fe9eSJakub Kicinski br_set_offset(&prog[i], 45532314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 45542314fe9eSJakub Kicinski break; 45552314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 45562314fe9eSJakub Kicinski br_set_offset(&prog[i], 45572314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 45582314fe9eSJakub Kicinski break; 4559389f263bSQuentin Monnet case RELO_BR_GO_CALL_PUSH_REGS: 456044549623SQuentin Monnet if (!nfp_prog->tgt_call_push_regs) { 456144549623SQuentin Monnet pr_err("BUG: failed to detect subprogram registers needs\n"); 456244549623SQuentin Monnet err = -EINVAL; 456344549623SQuentin Monnet goto err_free_prog; 456444549623SQuentin Monnet } 4565389f263bSQuentin Monnet off = nfp_prog->tgt_call_push_regs + bv->start_off; 4566389f263bSQuentin Monnet br_set_offset(&prog[i], off); 4567389f263bSQuentin Monnet break; 4568389f263bSQuentin Monnet case RELO_BR_GO_CALL_POP_REGS: 456944549623SQuentin Monnet if (!nfp_prog->tgt_call_pop_regs) { 457044549623SQuentin Monnet pr_err("BUG: failed to detect subprogram registers needs\n"); 457144549623SQuentin Monnet err = -EINVAL; 457244549623SQuentin Monnet goto err_free_prog; 457344549623SQuentin Monnet } 4574389f263bSQuentin Monnet off = nfp_prog->tgt_call_pop_regs + bv->start_off; 4575389f263bSQuentin Monnet br_set_offset(&prog[i], off); 4576389f263bSQuentin Monnet break; 45772314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 45782314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 45792314fe9eSJakub Kicinski break; 458077a3d311SJakub Kicinski case RELO_BR_HELPER: 458177a3d311SJakub Kicinski val = br_get_offset(prog[i]); 458277a3d311SJakub Kicinski val -= BR_OFF_RELO; 458377a3d311SJakub Kicinski switch (val) { 458477a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 458577a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 458677a3d311SJakub Kicinski break; 458744d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 458844d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 458944d65a47SJakub Kicinski break; 4590bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 4591bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 4592bfee64deSJakub Kicinski break; 45939816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 45949816dd35SJakub Kicinski val = nfp_prog->bpf->helpers.perf_event_output; 45959816dd35SJakub Kicinski break; 459677a3d311SJakub Kicinski default: 459777a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 459877a3d311SJakub Kicinski val); 459977a3d311SJakub Kicinski err = -EINVAL; 460077a3d311SJakub Kicinski goto err_free_prog; 460177a3d311SJakub Kicinski } 460277a3d311SJakub Kicinski br_set_offset(&prog[i], val); 460377a3d311SJakub Kicinski break; 460477a3d311SJakub Kicinski case RELO_IMMED_REL: 460577a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 460677a3d311SJakub Kicinski break; 46072314fe9eSJakub Kicinski } 46082314fe9eSJakub Kicinski 46092314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 46102314fe9eSJakub Kicinski } 46112314fe9eSJakub Kicinski 46122314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 46132314fe9eSJakub Kicinski if (err) 46142314fe9eSJakub Kicinski goto err_free_prog; 46152314fe9eSJakub Kicinski 46162314fe9eSJakub Kicinski return prog; 46172314fe9eSJakub Kicinski 46182314fe9eSJakub Kicinski err_free_prog: 46192314fe9eSJakub Kicinski kfree(prog); 46202314fe9eSJakub Kicinski return ERR_PTR(err); 46212314fe9eSJakub Kicinski } 4622