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 62677a3d311SJakub Kicinski wrp_immed_relo(struct nfp_prog *nfp_prog, swreg dst, u32 imm, 62777a3d311SJakub Kicinski enum nfp_relo_type relo) 62877a3d311SJakub Kicinski { 62977a3d311SJakub Kicinski if (imm > 0xffff) { 63077a3d311SJakub Kicinski pr_err("relocation of a large immediate!\n"); 63177a3d311SJakub Kicinski nfp_prog->error = -EFAULT; 63277a3d311SJakub Kicinski return; 63377a3d311SJakub Kicinski } 63477a3d311SJakub Kicinski emit_immed(nfp_prog, dst, imm, IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 63577a3d311SJakub Kicinski 63677a3d311SJakub Kicinski nfp_prog->prog[nfp_prog->prog_len - 1] |= 63777a3d311SJakub Kicinski FIELD_PREP(OP_RELO_TYPE, relo); 63877a3d311SJakub Kicinski } 63977a3d311SJakub Kicinski 640d9ae7f2bSJakub Kicinski /* ur_load_imm_any() - encode immediate or use tmp register (unrestricted) 641d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 642d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 643d9ae7f2bSJakub Kicinski */ 644b3f868dfSJakub Kicinski static swreg ur_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 645d9ae7f2bSJakub Kicinski { 646d9ae7f2bSJakub Kicinski if (FIELD_FIT(UR_REG_IMM_MAX, imm)) 647d9ae7f2bSJakub Kicinski return reg_imm(imm); 648d9ae7f2bSJakub Kicinski 649d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 650d9ae7f2bSJakub Kicinski return tmp_reg; 651d9ae7f2bSJakub Kicinski } 652d9ae7f2bSJakub Kicinski 653d9ae7f2bSJakub Kicinski /* re_load_imm_any() - encode immediate or use tmp register (restricted) 654d9ae7f2bSJakub Kicinski * If the @imm is small enough encode it directly in operand and return 655d9ae7f2bSJakub Kicinski * otherwise load @imm to a spare register and return its encoding. 656d9ae7f2bSJakub Kicinski */ 657b3f868dfSJakub Kicinski static swreg re_load_imm_any(struct nfp_prog *nfp_prog, u32 imm, swreg tmp_reg) 658d9ae7f2bSJakub Kicinski { 659d9ae7f2bSJakub Kicinski if (FIELD_FIT(RE_REG_IMM_MAX, imm)) 660d9ae7f2bSJakub Kicinski return reg_imm(imm); 661d9ae7f2bSJakub Kicinski 662d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, tmp_reg, imm); 663d9ae7f2bSJakub Kicinski return tmp_reg; 664d9ae7f2bSJakub Kicinski } 665d9ae7f2bSJakub Kicinski 666ff42bb9fSJakub Kicinski static void wrp_nops(struct nfp_prog *nfp_prog, unsigned int count) 667ff42bb9fSJakub Kicinski { 668ff42bb9fSJakub Kicinski while (count--) 669ff42bb9fSJakub Kicinski emit_nop(nfp_prog); 670ff42bb9fSJakub Kicinski } 671ff42bb9fSJakub Kicinski 672c000dfb5SJakub Kicinski static void wrp_mov(struct nfp_prog *nfp_prog, swreg dst, swreg src) 673c000dfb5SJakub Kicinski { 674c000dfb5SJakub Kicinski emit_alu(nfp_prog, dst, reg_none(), ALU_OP_NONE, src); 675c000dfb5SJakub Kicinski } 676c000dfb5SJakub Kicinski 677d9ae7f2bSJakub Kicinski static void wrp_reg_mov(struct nfp_prog *nfp_prog, u16 dst, u16 src) 678d9ae7f2bSJakub Kicinski { 679c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), reg_b(src)); 680d9ae7f2bSJakub Kicinski } 681d9ae7f2bSJakub Kicinski 6829879a381SJiong Wang /* wrp_reg_subpart() - load @field_len bytes from @offset of @src, write the 6839879a381SJiong Wang * result to @dst from low end. 6849879a381SJiong Wang */ 6859879a381SJiong Wang static void 6869879a381SJiong Wang wrp_reg_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, u8 field_len, 6879879a381SJiong Wang u8 offset) 6889879a381SJiong Wang { 6899879a381SJiong Wang enum shf_sc sc = offset ? SHF_SC_R_SHF : SHF_SC_NONE; 6909879a381SJiong Wang u8 mask = (1 << field_len) - 1; 6919879a381SJiong Wang 6929879a381SJiong Wang emit_ld_field_any(nfp_prog, dst, mask, src, sc, offset * 8, true); 6939879a381SJiong Wang } 6949879a381SJiong Wang 69591ff69e8SJiong Wang /* wrp_reg_or_subpart() - load @field_len bytes from low end of @src, or the 69691ff69e8SJiong Wang * result to @dst from offset, there is no change on the other bits of @dst. 69791ff69e8SJiong Wang */ 69891ff69e8SJiong Wang static void 69991ff69e8SJiong Wang wrp_reg_or_subpart(struct nfp_prog *nfp_prog, swreg dst, swreg src, 70091ff69e8SJiong Wang u8 field_len, u8 offset) 70191ff69e8SJiong Wang { 70291ff69e8SJiong Wang enum shf_sc sc = offset ? SHF_SC_L_SHF : SHF_SC_NONE; 70391ff69e8SJiong Wang u8 mask = ((1 << field_len) - 1) << offset; 70491ff69e8SJiong Wang 70591ff69e8SJiong Wang emit_ld_field(nfp_prog, dst, mask, src, sc, 32 - offset * 8); 70691ff69e8SJiong Wang } 70791ff69e8SJiong Wang 7083dd43c33SJakub Kicinski static void 7093dd43c33SJakub Kicinski addr40_offset(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 7103dd43c33SJakub Kicinski swreg *rega, swreg *regb) 7113dd43c33SJakub Kicinski { 7123dd43c33SJakub Kicinski if (offset == reg_imm(0)) { 7133dd43c33SJakub Kicinski *rega = reg_a(src_gpr); 7143dd43c33SJakub Kicinski *regb = reg_b(src_gpr + 1); 7153dd43c33SJakub Kicinski return; 7163dd43c33SJakub Kicinski } 7173dd43c33SJakub Kicinski 7183dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(src_gpr), ALU_OP_ADD, offset); 7193dd43c33SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), reg_b(src_gpr + 1), ALU_OP_ADD_C, 7203dd43c33SJakub Kicinski reg_imm(0)); 7213dd43c33SJakub Kicinski *rega = imm_a(nfp_prog); 7223dd43c33SJakub Kicinski *regb = imm_b(nfp_prog); 7233dd43c33SJakub Kicinski } 7243dd43c33SJakub Kicinski 7259879a381SJiong Wang /* NFP has Command Push Pull bus which supports bluk memory operations. */ 7269879a381SJiong Wang static int nfp_cpp_memcpy(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 7279879a381SJiong Wang { 7289879a381SJiong Wang bool descending_seq = meta->ldst_gather_len < 0; 7299879a381SJiong Wang s16 len = abs(meta->ldst_gather_len); 7309879a381SJiong Wang swreg src_base, off; 7313dd43c33SJakub Kicinski bool src_40bit_addr; 7329879a381SJiong Wang unsigned int i; 7339879a381SJiong Wang u8 xfer_num; 7349879a381SJiong Wang 7359879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 7363dd43c33SJakub Kicinski src_40bit_addr = meta->ptr.type == PTR_TO_MAP_VALUE; 7379879a381SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 7389879a381SJiong Wang xfer_num = round_up(len, 4) / 4; 7399879a381SJiong Wang 7403dd43c33SJakub Kicinski if (src_40bit_addr) 741cc0dff6dSJiong Wang addr40_offset(nfp_prog, meta->insn.src_reg * 2, off, &src_base, 7423dd43c33SJakub Kicinski &off); 7433dd43c33SJakub Kicinski 7448c900538SJiong Wang /* Setup PREV_ALU fields to override memory read length. */ 7458c900538SJiong Wang if (len > 32) 7468c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7478c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7488c900538SJiong Wang 7499879a381SJiong Wang /* Memory read from source addr into transfer-in registers. */ 7503dd43c33SJakub Kicinski emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, 7513dd43c33SJakub Kicinski src_40bit_addr ? CMD_MODE_40b_BA : CMD_MODE_32b, 0, 752b556ddd9SJakub Kicinski src_base, off, xfer_num - 1, CMD_CTX_SWAP, len > 32); 7539879a381SJiong Wang 7549879a381SJiong Wang /* Move from transfer-in to transfer-out. */ 7559879a381SJiong Wang for (i = 0; i < xfer_num; i++) 7569879a381SJiong Wang wrp_mov(nfp_prog, reg_xfer(i), reg_xfer(i)); 7579879a381SJiong Wang 7589879a381SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off, imm_b(nfp_prog)); 7599879a381SJiong Wang 7609879a381SJiong Wang if (len <= 8) { 7619879a381SJiong Wang /* Use single direct_ref write8. */ 7629879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7639879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 1, 764b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7658c900538SJiong Wang } else if (len <= 32 && IS_ALIGNED(len, 4)) { 7669879a381SJiong Wang /* Use single direct_ref write32. */ 7679879a381SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7689879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, xfer_num - 1, 769b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7708c900538SJiong Wang } else if (len <= 32) { 7719879a381SJiong Wang /* Use single indirect_ref write8. */ 7729879a381SJiong Wang wrp_immed(nfp_prog, reg_none(), 7739879a381SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, len - 1)); 7749879a381SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 7759879a381SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 776b556ddd9SJakub Kicinski len - 1, CMD_CTX_SWAP); 7778c900538SJiong Wang } else if (IS_ALIGNED(len, 4)) { 7788c900538SJiong Wang /* Use single indirect_ref write32. */ 7798c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 7808c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 7818c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7828c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 783b556ddd9SJakub Kicinski xfer_num - 1, CMD_CTX_SWAP); 7848c900538SJiong Wang } else if (len <= 40) { 7858c900538SJiong Wang /* Use one direct_ref write32 to write the first 32-bytes, then 7868c900538SJiong Wang * another direct_ref write8 to write the remaining bytes. 7878c900538SJiong Wang */ 7888c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 7898c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 7, 790b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7918c900538SJiong Wang 7928c900538SJiong Wang off = re_load_imm_any(nfp_prog, meta->paired_st->off + 32, 7938c900538SJiong Wang imm_b(nfp_prog)); 7948c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8, 7958c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, len - 33, 796b556ddd9SJakub Kicinski CMD_CTX_SWAP); 7978c900538SJiong Wang } else { 7988c900538SJiong Wang /* Use one indirect_ref write32 to write 4-bytes aligned length, 7998c900538SJiong Wang * then another direct_ref write8 to write the remaining bytes. 8008c900538SJiong Wang */ 8018c900538SJiong Wang u8 new_off; 8028c900538SJiong Wang 8038c900538SJiong Wang wrp_immed(nfp_prog, reg_none(), 8048c900538SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 2)); 8058c900538SJiong Wang emit_cmd_indir(nfp_prog, CMD_TGT_WRITE32_SWAP, CMD_MODE_32b, 0, 8068c900538SJiong Wang reg_a(meta->paired_st->dst_reg * 2), off, 807b556ddd9SJakub Kicinski xfer_num - 2, CMD_CTX_SWAP); 8088c900538SJiong Wang new_off = meta->paired_st->off + (xfer_num - 1) * 4; 8098c900538SJiong Wang off = re_load_imm_any(nfp_prog, new_off, imm_b(nfp_prog)); 8108c900538SJiong Wang emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 8118c900538SJiong Wang xfer_num - 1, reg_a(meta->paired_st->dst_reg * 2), off, 812b556ddd9SJakub Kicinski (len & 0x3) - 1, CMD_CTX_SWAP); 8139879a381SJiong Wang } 8149879a381SJiong Wang 8159879a381SJiong Wang /* TODO: The following extra load is to make sure data flow be identical 8169879a381SJiong Wang * before and after we do memory copy optimization. 8179879a381SJiong Wang * 8189879a381SJiong Wang * The load destination register is not guaranteed to be dead, so we 8199879a381SJiong Wang * need to make sure it is loaded with the value the same as before 8209879a381SJiong Wang * this transformation. 8219879a381SJiong Wang * 8229879a381SJiong Wang * These extra loads could be removed once we have accurate register 8239879a381SJiong Wang * usage information. 8249879a381SJiong Wang */ 8259879a381SJiong Wang if (descending_seq) 8269879a381SJiong Wang xfer_num = 0; 8279879a381SJiong Wang else if (BPF_SIZE(meta->insn.code) != BPF_DW) 8289879a381SJiong Wang xfer_num = xfer_num - 1; 8299879a381SJiong Wang else 8309879a381SJiong Wang xfer_num = xfer_num - 2; 8319879a381SJiong Wang 8329879a381SJiong Wang switch (BPF_SIZE(meta->insn.code)) { 8339879a381SJiong Wang case BPF_B: 8349879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8359879a381SJiong Wang reg_xfer(xfer_num), 1, 8369879a381SJiong Wang IS_ALIGNED(len, 4) ? 3 : (len & 3) - 1); 8379879a381SJiong Wang break; 8389879a381SJiong Wang case BPF_H: 8399879a381SJiong Wang wrp_reg_subpart(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8409879a381SJiong Wang reg_xfer(xfer_num), 2, (len & 3) ^ 2); 8419879a381SJiong Wang break; 8429879a381SJiong Wang case BPF_W: 8439879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8449879a381SJiong Wang reg_xfer(0)); 8459879a381SJiong Wang break; 8469879a381SJiong Wang case BPF_DW: 8479879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2), 8489879a381SJiong Wang reg_xfer(xfer_num)); 8499879a381SJiong Wang wrp_mov(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 8509879a381SJiong Wang reg_xfer(xfer_num + 1)); 8519879a381SJiong Wang break; 8529879a381SJiong Wang } 8539879a381SJiong Wang 8549879a381SJiong Wang if (BPF_SIZE(meta->insn.code) != BPF_DW) 8559879a381SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 8569879a381SJiong Wang 8579879a381SJiong Wang return 0; 8589879a381SJiong Wang } 8599879a381SJiong Wang 860d9ae7f2bSJakub Kicinski static int 8610a793977SJakub Kicinski data_ld(struct nfp_prog *nfp_prog, swreg offset, u8 dst_gpr, int size) 862d9ae7f2bSJakub Kicinski { 863d9ae7f2bSJakub Kicinski unsigned int i; 864d9ae7f2bSJakub Kicinski u16 shift, sz; 865d9ae7f2bSJakub Kicinski 866d9ae7f2bSJakub Kicinski /* We load the value from the address indicated in @offset and then 867d9ae7f2bSJakub Kicinski * shift out the data we don't need. Note: this is big endian! 868d9ae7f2bSJakub Kicinski */ 8690a793977SJakub Kicinski sz = max(size, 4); 870d9ae7f2bSJakub Kicinski shift = size < 4 ? 4 - size : 0; 871d9ae7f2bSJakub Kicinski 8720a793977SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ8, CMD_MODE_32b, 0, 873b556ddd9SJakub Kicinski pptr_reg(nfp_prog), offset, sz - 1, CMD_CTX_SWAP); 8740a793977SJakub Kicinski 8750a793977SJakub Kicinski i = 0; 8760a793977SJakub Kicinski if (shift) 8770a793977SJakub Kicinski emit_shf(nfp_prog, reg_both(dst_gpr), reg_none(), SHF_OP_NONE, 8780a793977SJakub Kicinski reg_xfer(0), SHF_SC_R_SHF, shift * 8); 8790a793977SJakub Kicinski else 8800a793977SJakub Kicinski for (; i * 4 < size; i++) 8810a793977SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 8820a793977SJakub Kicinski 8830a793977SJakub Kicinski if (i < 2) 8840a793977SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 8850a793977SJakub Kicinski 8860a793977SJakub Kicinski return 0; 8870a793977SJakub Kicinski } 8880a793977SJakub Kicinski 8890a793977SJakub Kicinski static int 8903dd43c33SJakub Kicinski data_ld_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, 8913dd43c33SJakub Kicinski swreg lreg, swreg rreg, int size, enum cmd_mode mode) 8922ca71441SJakub Kicinski { 8932ca71441SJakub Kicinski unsigned int i; 8942ca71441SJakub Kicinski u8 mask, sz; 8952ca71441SJakub Kicinski 8963dd43c33SJakub Kicinski /* We load the value from the address indicated in rreg + lreg and then 8972ca71441SJakub Kicinski * mask out the data we don't need. Note: this is little endian! 8982ca71441SJakub Kicinski */ 8992ca71441SJakub Kicinski sz = max(size, 4); 9002ca71441SJakub Kicinski mask = size < 4 ? GENMASK(size - 1, 0) : 0; 9012ca71441SJakub Kicinski 9023dd43c33SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_READ32_SWAP, mode, 0, 903b556ddd9SJakub Kicinski lreg, rreg, sz / 4 - 1, CMD_CTX_SWAP); 9042ca71441SJakub Kicinski 9052ca71441SJakub Kicinski i = 0; 9062ca71441SJakub Kicinski if (mask) 9072ca71441SJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst_gpr), mask, 9082ca71441SJakub Kicinski reg_xfer(0), SHF_SC_NONE, 0, true); 9092ca71441SJakub Kicinski else 9102ca71441SJakub Kicinski for (; i * 4 < size; i++) 9112ca71441SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst_gpr + i), reg_xfer(i)); 9122ca71441SJakub Kicinski 9132ca71441SJakub Kicinski if (i < 2) 9142ca71441SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst_gpr + 1), 0); 9152ca71441SJakub Kicinski 9162ca71441SJakub Kicinski return 0; 9172ca71441SJakub Kicinski } 9182ca71441SJakub Kicinski 9192ca71441SJakub Kicinski static int 9203dd43c33SJakub Kicinski data_ld_host_order_addr32(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 9213dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 9223dd43c33SJakub Kicinski { 9233dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, reg_a(src_gpr), offset, 9243dd43c33SJakub Kicinski size, CMD_MODE_32b); 9253dd43c33SJakub Kicinski } 9263dd43c33SJakub Kicinski 9273dd43c33SJakub Kicinski static int 9283dd43c33SJakub Kicinski data_ld_host_order_addr40(struct nfp_prog *nfp_prog, u8 src_gpr, swreg offset, 9293dd43c33SJakub Kicinski u8 dst_gpr, u8 size) 9303dd43c33SJakub Kicinski { 9313dd43c33SJakub Kicinski swreg rega, regb; 9323dd43c33SJakub Kicinski 9333dd43c33SJakub Kicinski addr40_offset(nfp_prog, src_gpr, offset, ®a, ®b); 9343dd43c33SJakub Kicinski 9353dd43c33SJakub Kicinski return data_ld_host_order(nfp_prog, dst_gpr, rega, regb, 9363dd43c33SJakub Kicinski size, CMD_MODE_40b_BA); 9373dd43c33SJakub Kicinski } 9383dd43c33SJakub Kicinski 9393dd43c33SJakub Kicinski static int 9400a793977SJakub Kicinski construct_data_ind_ld(struct nfp_prog *nfp_prog, u16 offset, u16 src, u8 size) 9410a793977SJakub Kicinski { 9420a793977SJakub Kicinski swreg tmp_reg; 9430a793977SJakub Kicinski 944d9ae7f2bSJakub Kicinski /* Calculate the true offset (src_reg + imm) */ 945d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9460a793977SJakub Kicinski emit_alu(nfp_prog, imm_both(nfp_prog), reg_a(src), ALU_OP_ADD, tmp_reg); 9470a793977SJakub Kicinski 948d9ae7f2bSJakub Kicinski /* Check packet length (size guaranteed to fit b/c it's u8) */ 949d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 950d9ae7f2bSJakub Kicinski imm_a(nfp_prog), ALU_OP_ADD, reg_imm(size)); 951d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 95218e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, imm_a(nfp_prog)); 953e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9540a793977SJakub Kicinski 955d9ae7f2bSJakub Kicinski /* Load data */ 9560a793977SJakub Kicinski return data_ld(nfp_prog, imm_b(nfp_prog), 0, size); 957d9ae7f2bSJakub Kicinski } 958d9ae7f2bSJakub Kicinski 959d9ae7f2bSJakub Kicinski static int construct_data_ld(struct nfp_prog *nfp_prog, u16 offset, u8 size) 960d9ae7f2bSJakub Kicinski { 9610a793977SJakub Kicinski swreg tmp_reg; 9620a793977SJakub Kicinski 9630a793977SJakub Kicinski /* Check packet length */ 9640a793977SJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, offset + size, imm_a(nfp_prog)); 9650a793977SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 966e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_BLO, BR_OFF_RELO, 0, RELO_BR_GO_ABORT); 9670a793977SJakub Kicinski 9680a793977SJakub Kicinski /* Load data */ 9690a793977SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, offset, imm_b(nfp_prog)); 9700a793977SJakub Kicinski return data_ld(nfp_prog, tmp_reg, 0, size); 971d9ae7f2bSJakub Kicinski } 972d9ae7f2bSJakub Kicinski 973e663fe38SJakub Kicinski static int 974e663fe38SJakub Kicinski data_stx_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 975e663fe38SJakub Kicinski u8 src_gpr, u8 size) 976e663fe38SJakub Kicinski { 977e663fe38SJakub Kicinski unsigned int i; 978e663fe38SJakub Kicinski 979e663fe38SJakub Kicinski for (i = 0; i * 4 < size; i++) 980e663fe38SJakub Kicinski wrp_mov(nfp_prog, reg_xfer(i), reg_a(src_gpr + i)); 981e663fe38SJakub Kicinski 982e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 983b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 984e663fe38SJakub Kicinski 985e663fe38SJakub Kicinski return 0; 986e663fe38SJakub Kicinski } 987e663fe38SJakub Kicinski 988e663fe38SJakub Kicinski static int 989e663fe38SJakub Kicinski data_st_host_order(struct nfp_prog *nfp_prog, u8 dst_gpr, swreg offset, 990e663fe38SJakub Kicinski u64 imm, u8 size) 991e663fe38SJakub Kicinski { 992e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(0), imm); 993e663fe38SJakub Kicinski if (size == 8) 994e663fe38SJakub Kicinski wrp_immed(nfp_prog, reg_xfer(1), imm >> 32); 995e663fe38SJakub Kicinski 996e663fe38SJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_WRITE8_SWAP, CMD_MODE_32b, 0, 997b556ddd9SJakub Kicinski reg_a(dst_gpr), offset, size - 1, CMD_CTX_SWAP); 998e663fe38SJakub Kicinski 999e663fe38SJakub Kicinski return 0; 1000e663fe38SJakub Kicinski } 1001e663fe38SJakub Kicinski 1002ee9133a8SJakub Kicinski typedef int 1003ee9133a8SJakub Kicinski (*lmem_step)(struct nfp_prog *nfp_prog, u8 gpr, u8 gpr_byte, s32 off, 10042df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10052df03a50SJakub Kicinski bool needs_inc); 1006a82b23fbSJakub Kicinski 1007a82b23fbSJakub Kicinski static int 1008a82b23fbSJakub Kicinski wrp_lmem_load(struct nfp_prog *nfp_prog, u8 dst, u8 dst_byte, s32 off, 10092df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10102df03a50SJakub Kicinski bool needs_inc) 1011a82b23fbSJakub Kicinski { 10122df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1013a82b23fbSJakub Kicinski u32 idx, src_byte; 1014a82b23fbSJakub Kicinski enum shf_sc sc; 1015a82b23fbSJakub Kicinski swreg reg; 1016a82b23fbSJakub Kicinski int shf; 1017a82b23fbSJakub Kicinski u8 mask; 1018a82b23fbSJakub Kicinski 1019a82b23fbSJakub Kicinski if (WARN_ON_ONCE(dst_byte + size > 4 || off % 4 + size > 4)) 1020a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1021a82b23fbSJakub Kicinski 1022a82b23fbSJakub Kicinski idx = off / 4; 1023a82b23fbSJakub Kicinski 1024a82b23fbSJakub Kicinski /* Move the entire word */ 1025a82b23fbSJakub Kicinski if (size == 4) { 10262df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_both(dst), 10272df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx)); 1028a82b23fbSJakub Kicinski return 0; 1029a82b23fbSJakub Kicinski } 1030a82b23fbSJakub Kicinski 10312df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 10322df03a50SJakub Kicinski return -EOPNOTSUPP; 10332df03a50SJakub Kicinski 1034a82b23fbSJakub Kicinski src_byte = off % 4; 1035a82b23fbSJakub Kicinski 1036a82b23fbSJakub Kicinski mask = (1 << size) - 1; 1037a82b23fbSJakub Kicinski mask <<= dst_byte; 1038a82b23fbSJakub Kicinski 1039a82b23fbSJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1040a82b23fbSJakub Kicinski return -EOPNOTSUPP; 1041a82b23fbSJakub Kicinski 1042a82b23fbSJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1043a82b23fbSJakub Kicinski if (src_byte == dst_byte) { 1044a82b23fbSJakub Kicinski sc = SHF_SC_NONE; 1045a82b23fbSJakub Kicinski } else if (src_byte < dst_byte) { 1046a82b23fbSJakub Kicinski shf = 32 - shf; 1047a82b23fbSJakub Kicinski sc = SHF_SC_L_SHF; 1048a82b23fbSJakub Kicinski } else { 1049a82b23fbSJakub Kicinski sc = SHF_SC_R_SHF; 1050a82b23fbSJakub Kicinski } 1051a82b23fbSJakub Kicinski 1052a82b23fbSJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1053a82b23fbSJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1054a82b23fbSJakub Kicinski */ 1055a82b23fbSJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 10562df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1057a82b23fbSJakub Kicinski } else { 1058a82b23fbSJakub Kicinski reg = imm_a(nfp_prog); 10599a90c83cSJakub Kicinski /* If it's not the first part of the load and we start a new GPR 10609a90c83cSJakub Kicinski * that means we are loading a second part of the LMEM word into 10619a90c83cSJakub Kicinski * a new GPR. IOW we've already looked that LMEM word and 10629a90c83cSJakub Kicinski * therefore it has been loaded into imm_a(). 10639a90c83cSJakub Kicinski */ 10649a90c83cSJakub Kicinski if (first || !new_gpr) 1065a82b23fbSJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1066a82b23fbSJakub Kicinski } 1067a82b23fbSJakub Kicinski 1068a82b23fbSJakub Kicinski emit_ld_field_any(nfp_prog, reg_both(dst), mask, reg, sc, shf, new_gpr); 1069a82b23fbSJakub Kicinski 10702df03a50SJakub Kicinski if (should_inc) 10712df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 10722df03a50SJakub Kicinski 1073a82b23fbSJakub Kicinski return 0; 1074a82b23fbSJakub Kicinski } 1075ee9133a8SJakub Kicinski 1076ee9133a8SJakub Kicinski static int 1077ee9133a8SJakub Kicinski wrp_lmem_store(struct nfp_prog *nfp_prog, u8 src, u8 src_byte, s32 off, 10782df03a50SJakub Kicinski unsigned int size, bool first, bool new_gpr, bool last, bool lm3, 10792df03a50SJakub Kicinski bool needs_inc) 1080ee9133a8SJakub Kicinski { 10812df03a50SJakub Kicinski bool should_inc = needs_inc && new_gpr && !last; 1082ee9133a8SJakub Kicinski u32 idx, dst_byte; 1083ee9133a8SJakub Kicinski enum shf_sc sc; 1084ee9133a8SJakub Kicinski swreg reg; 1085ee9133a8SJakub Kicinski int shf; 1086ee9133a8SJakub Kicinski u8 mask; 1087ee9133a8SJakub Kicinski 1088ee9133a8SJakub Kicinski if (WARN_ON_ONCE(src_byte + size > 4 || off % 4 + size > 4)) 1089ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1090ee9133a8SJakub Kicinski 1091ee9133a8SJakub Kicinski idx = off / 4; 1092ee9133a8SJakub Kicinski 1093ee9133a8SJakub Kicinski /* Move the entire word */ 1094ee9133a8SJakub Kicinski if (size == 4) { 10952df03a50SJakub Kicinski wrp_mov(nfp_prog, 10962df03a50SJakub Kicinski should_inc ? reg_lm_inc(3) : reg_lm(lm3 ? 3 : 0, idx), 10972df03a50SJakub Kicinski reg_b(src)); 1098ee9133a8SJakub Kicinski return 0; 1099ee9133a8SJakub Kicinski } 1100ee9133a8SJakub Kicinski 11012df03a50SJakub Kicinski if (WARN_ON_ONCE(lm3 && idx > RE_REG_LM_IDX_MAX)) 11022df03a50SJakub Kicinski return -EOPNOTSUPP; 11032df03a50SJakub Kicinski 1104ee9133a8SJakub Kicinski dst_byte = off % 4; 1105ee9133a8SJakub Kicinski 1106ee9133a8SJakub Kicinski mask = (1 << size) - 1; 1107ee9133a8SJakub Kicinski mask <<= dst_byte; 1108ee9133a8SJakub Kicinski 1109ee9133a8SJakub Kicinski if (WARN_ON_ONCE(mask > 0xf)) 1110ee9133a8SJakub Kicinski return -EOPNOTSUPP; 1111ee9133a8SJakub Kicinski 1112ee9133a8SJakub Kicinski shf = abs(src_byte - dst_byte) * 8; 1113ee9133a8SJakub Kicinski if (src_byte == dst_byte) { 1114ee9133a8SJakub Kicinski sc = SHF_SC_NONE; 1115ee9133a8SJakub Kicinski } else if (src_byte < dst_byte) { 1116ee9133a8SJakub Kicinski shf = 32 - shf; 1117ee9133a8SJakub Kicinski sc = SHF_SC_L_SHF; 1118ee9133a8SJakub Kicinski } else { 1119ee9133a8SJakub Kicinski sc = SHF_SC_R_SHF; 1120ee9133a8SJakub Kicinski } 1121ee9133a8SJakub Kicinski 1122ee9133a8SJakub Kicinski /* ld_field can address fewer indexes, if offset too large do RMW. 1123ee9133a8SJakub Kicinski * Because we RMV twice we waste 2 cycles on unaligned 8 byte writes. 1124ee9133a8SJakub Kicinski */ 1125ee9133a8SJakub Kicinski if (idx <= RE_REG_LM_IDX_MAX) { 11262df03a50SJakub Kicinski reg = reg_lm(lm3 ? 3 : 0, idx); 1127ee9133a8SJakub Kicinski } else { 1128ee9133a8SJakub Kicinski reg = imm_a(nfp_prog); 11299a90c83cSJakub Kicinski /* Only first and last LMEM locations are going to need RMW, 11309a90c83cSJakub Kicinski * the middle location will be overwritten fully. 11319a90c83cSJakub Kicinski */ 11329a90c83cSJakub Kicinski if (first || last) 1133ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg, reg_lm(0, idx)); 1134ee9133a8SJakub Kicinski } 1135ee9133a8SJakub Kicinski 1136ee9133a8SJakub Kicinski emit_ld_field(nfp_prog, reg, mask, reg_b(src), sc, shf); 1137ee9133a8SJakub Kicinski 11389a90c83cSJakub Kicinski if (new_gpr || last) { 1139ee9133a8SJakub Kicinski if (idx > RE_REG_LM_IDX_MAX) 1140ee9133a8SJakub Kicinski wrp_mov(nfp_prog, reg_lm(0, idx), reg); 11412df03a50SJakub Kicinski if (should_inc) 11422df03a50SJakub Kicinski wrp_mov(nfp_prog, reg_none(), reg_lm_inc(3)); 11439a90c83cSJakub Kicinski } 1144ee9133a8SJakub Kicinski 1145ee9133a8SJakub Kicinski return 0; 1146ee9133a8SJakub Kicinski } 1147ee9133a8SJakub Kicinski 1148ee9133a8SJakub Kicinski static int 1149ee9133a8SJakub Kicinski mem_op_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1150b14157eeSJakub Kicinski unsigned int size, unsigned int ptr_off, u8 gpr, u8 ptr_gpr, 1151b14157eeSJakub Kicinski bool clr_gpr, lmem_step step) 1152ee9133a8SJakub Kicinski { 11531a7e62e6SQuentin Monnet s32 off = nfp_prog->stack_frame_depth + meta->insn.off + ptr_off; 11549a90c83cSJakub Kicinski bool first = true, last; 11552df03a50SJakub Kicinski bool needs_inc = false; 11562df03a50SJakub Kicinski swreg stack_off_reg; 1157a82b23fbSJakub Kicinski u8 prev_gpr = 255; 1158ee9133a8SJakub Kicinski u32 gpr_byte = 0; 11592df03a50SJakub Kicinski bool lm3 = true; 1160ee9133a8SJakub Kicinski int ret; 1161ee9133a8SJakub Kicinski 11627ff0ccdeSQuentin Monnet if (meta->ptr_not_const || 11637ff0ccdeSQuentin Monnet meta->flags & FLAG_INSN_PTR_CALLER_STACK_FRAME) { 1164b14157eeSJakub Kicinski /* Use of the last encountered ptr_off is OK, they all have 1165b14157eeSJakub Kicinski * the same alignment. Depend on low bits of value being 1166b14157eeSJakub Kicinski * discarded when written to LMaddr register. 1167b14157eeSJakub Kicinski */ 1168b14157eeSJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, meta->insn.off, 1169b14157eeSJakub Kicinski stack_imm(nfp_prog)); 1170b14157eeSJakub Kicinski 1171b14157eeSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 1172b14157eeSJakub Kicinski reg_a(ptr_gpr), ALU_OP_ADD, stack_off_reg); 1173b14157eeSJakub Kicinski 1174b14157eeSJakub Kicinski needs_inc = true; 1175b14157eeSJakub Kicinski } else if (off + size <= 64) { 11762df03a50SJakub Kicinski /* We can reach bottom 64B with LMaddr0 */ 11772df03a50SJakub Kicinski lm3 = false; 11782df03a50SJakub Kicinski } else if (round_down(off, 32) == round_down(off + size - 1, 32)) { 11792df03a50SJakub Kicinski /* We have to set up a new pointer. If we know the offset 11802df03a50SJakub Kicinski * and the entire access falls into a single 32 byte aligned 11812df03a50SJakub Kicinski * window we won't have to increment the LM pointer. 11822df03a50SJakub Kicinski * The 32 byte alignment is imporant because offset is ORed in 11832df03a50SJakub Kicinski * not added when doing *l$indexN[off]. 11842df03a50SJakub Kicinski */ 11852df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 32), 11862df03a50SJakub Kicinski stack_imm(nfp_prog)); 11872df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11882df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11892df03a50SJakub Kicinski 11902df03a50SJakub Kicinski off %= 32; 11912df03a50SJakub Kicinski } else { 11922df03a50SJakub Kicinski stack_off_reg = ur_load_imm_any(nfp_prog, round_down(off, 4), 11932df03a50SJakub Kicinski stack_imm(nfp_prog)); 11942df03a50SJakub Kicinski 11952df03a50SJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 11962df03a50SJakub Kicinski stack_reg(nfp_prog), ALU_OP_ADD, stack_off_reg); 11972df03a50SJakub Kicinski 11982df03a50SJakub Kicinski needs_inc = true; 11992df03a50SJakub Kicinski } 12002df03a50SJakub Kicinski if (lm3) { 12012df03a50SJakub Kicinski emit_csr_wr(nfp_prog, imm_b(nfp_prog), NFP_CSR_ACT_LM_ADDR3); 12022df03a50SJakub Kicinski /* For size < 4 one slot will be filled by zeroing of upper. */ 12032df03a50SJakub Kicinski wrp_nops(nfp_prog, clr_gpr && size < 8 ? 2 : 3); 12042df03a50SJakub Kicinski } 12052df03a50SJakub Kicinski 1206a82b23fbSJakub Kicinski if (clr_gpr && size < 8) 1207a82b23fbSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 1208a82b23fbSJakub Kicinski 1209ee9133a8SJakub Kicinski while (size) { 1210ee9133a8SJakub Kicinski u32 slice_end; 1211ee9133a8SJakub Kicinski u8 slice_size; 1212ee9133a8SJakub Kicinski 1213ee9133a8SJakub Kicinski slice_size = min(size, 4 - gpr_byte); 1214ee9133a8SJakub Kicinski slice_end = min(off + slice_size, round_up(off + 1, 4)); 1215ee9133a8SJakub Kicinski slice_size = slice_end - off; 1216ee9133a8SJakub Kicinski 12179a90c83cSJakub Kicinski last = slice_size == size; 12189a90c83cSJakub Kicinski 12192df03a50SJakub Kicinski if (needs_inc) 12202df03a50SJakub Kicinski off %= 4; 12212df03a50SJakub Kicinski 1222a82b23fbSJakub Kicinski ret = step(nfp_prog, gpr, gpr_byte, off, slice_size, 12232df03a50SJakub Kicinski first, gpr != prev_gpr, last, lm3, needs_inc); 1224ee9133a8SJakub Kicinski if (ret) 1225ee9133a8SJakub Kicinski return ret; 1226ee9133a8SJakub Kicinski 1227a82b23fbSJakub Kicinski prev_gpr = gpr; 12289a90c83cSJakub Kicinski first = false; 12299a90c83cSJakub Kicinski 1230ee9133a8SJakub Kicinski gpr_byte += slice_size; 1231ee9133a8SJakub Kicinski if (gpr_byte >= 4) { 1232ee9133a8SJakub Kicinski gpr_byte -= 4; 1233ee9133a8SJakub Kicinski gpr++; 1234ee9133a8SJakub Kicinski } 1235ee9133a8SJakub Kicinski 1236ee9133a8SJakub Kicinski size -= slice_size; 1237ee9133a8SJakub Kicinski off += slice_size; 1238ee9133a8SJakub Kicinski } 1239ee9133a8SJakub Kicinski 1240ee9133a8SJakub Kicinski return 0; 1241ee9133a8SJakub Kicinski } 1242ee9133a8SJakub Kicinski 1243d9ae7f2bSJakub Kicinski static void 1244d9ae7f2bSJakub Kicinski wrp_alu_imm(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u32 imm) 1245d9ae7f2bSJakub Kicinski { 1246b3f868dfSJakub Kicinski swreg tmp_reg; 1247d9ae7f2bSJakub Kicinski 1248d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_AND) { 1249d9ae7f2bSJakub Kicinski if (!imm) 1250d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 1251d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1252d9ae7f2bSJakub Kicinski return; 1253d9ae7f2bSJakub Kicinski } 1254d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_OR) { 1255d9ae7f2bSJakub Kicinski if (!~imm) 1256d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), ~0U); 1257d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1258d9ae7f2bSJakub Kicinski return; 1259d9ae7f2bSJakub Kicinski } 1260d9ae7f2bSJakub Kicinski if (alu_op == ALU_OP_XOR) { 1261d9ae7f2bSJakub Kicinski if (!~imm) 1262d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_none(), 12635d42ced1SJiong Wang ALU_OP_NOT, reg_b(dst)); 1264d9ae7f2bSJakub Kicinski if (!imm || !~imm) 1265d9ae7f2bSJakub Kicinski return; 1266d9ae7f2bSJakub Kicinski } 1267d9ae7f2bSJakub Kicinski 1268d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1269d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, tmp_reg); 1270d9ae7f2bSJakub Kicinski } 1271d9ae7f2bSJakub Kicinski 1272d9ae7f2bSJakub Kicinski static int 1273d9ae7f2bSJakub Kicinski wrp_alu64_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1274d9ae7f2bSJakub Kicinski enum alu_op alu_op, bool skip) 1275d9ae7f2bSJakub Kicinski { 1276d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1277d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1278d9ae7f2bSJakub Kicinski 1279d9ae7f2bSJakub Kicinski if (skip) { 128091a87a58SJakub Kicinski meta->flags |= FLAG_INSN_SKIP_NOOP; 1281d9ae7f2bSJakub Kicinski return 0; 1282d9ae7f2bSJakub Kicinski } 1283d9ae7f2bSJakub Kicinski 1284d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, imm & ~0U); 1285d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, alu_op, imm >> 32); 1286d9ae7f2bSJakub Kicinski 1287d9ae7f2bSJakub Kicinski return 0; 1288d9ae7f2bSJakub Kicinski } 1289d9ae7f2bSJakub Kicinski 1290d9ae7f2bSJakub Kicinski static int 1291d9ae7f2bSJakub Kicinski wrp_alu64_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1292d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1293d9ae7f2bSJakub Kicinski { 1294d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1295d9ae7f2bSJakub Kicinski 1296d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1297d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst + 1), 1298d9ae7f2bSJakub Kicinski reg_a(dst + 1), alu_op, reg_b(src + 1)); 1299d9ae7f2bSJakub Kicinski 1300d9ae7f2bSJakub Kicinski return 0; 1301d9ae7f2bSJakub Kicinski } 1302d9ae7f2bSJakub Kicinski 1303d9ae7f2bSJakub Kicinski static int 1304d9ae7f2bSJakub Kicinski wrp_alu32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1305f036ebd9SJiong Wang enum alu_op alu_op) 1306d9ae7f2bSJakub Kicinski { 1307d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1308d9ae7f2bSJakub Kicinski 1309d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, alu_op, insn->imm); 1310d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 1311d9ae7f2bSJakub Kicinski 1312d9ae7f2bSJakub Kicinski return 0; 1313d9ae7f2bSJakub Kicinski } 1314d9ae7f2bSJakub Kicinski 1315d9ae7f2bSJakub Kicinski static int 1316d9ae7f2bSJakub Kicinski wrp_alu32_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1317d9ae7f2bSJakub Kicinski enum alu_op alu_op) 1318d9ae7f2bSJakub Kicinski { 1319d9ae7f2bSJakub Kicinski u8 dst = meta->insn.dst_reg * 2, src = meta->insn.src_reg * 2; 1320d9ae7f2bSJakub Kicinski 1321d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(dst), reg_a(dst), alu_op, reg_b(src)); 1322d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 1323d9ae7f2bSJakub Kicinski 1324d9ae7f2bSJakub Kicinski return 0; 1325d9ae7f2bSJakub Kicinski } 1326d9ae7f2bSJakub Kicinski 1327d9ae7f2bSJakub Kicinski static void 1328d9ae7f2bSJakub Kicinski wrp_test_reg_one(struct nfp_prog *nfp_prog, u8 dst, enum alu_op alu_op, u8 src, 1329d9ae7f2bSJakub Kicinski enum br_mask br_mask, u16 off) 1330d9ae7f2bSJakub Kicinski { 1331d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(dst), alu_op, reg_b(src)); 1332d9ae7f2bSJakub Kicinski emit_br(nfp_prog, br_mask, off, 0); 1333d9ae7f2bSJakub Kicinski } 1334d9ae7f2bSJakub Kicinski 1335d9ae7f2bSJakub Kicinski static int 1336d9ae7f2bSJakub Kicinski wrp_test_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1337d9ae7f2bSJakub Kicinski enum alu_op alu_op, enum br_mask br_mask) 1338d9ae7f2bSJakub Kicinski { 1339d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1340d9ae7f2bSJakub Kicinski 1341d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2, alu_op, 1342d9ae7f2bSJakub Kicinski insn->src_reg * 2, br_mask, insn->off); 134346144839SJiong Wang if (is_mbpf_jmp64(meta)) 1344d9ae7f2bSJakub Kicinski wrp_test_reg_one(nfp_prog, insn->dst_reg * 2 + 1, alu_op, 1345d9ae7f2bSJakub Kicinski insn->src_reg * 2 + 1, br_mask, insn->off); 1346d9ae7f2bSJakub Kicinski 1347d9ae7f2bSJakub Kicinski return 0; 1348d9ae7f2bSJakub Kicinski } 1349d9ae7f2bSJakub Kicinski 135061dd8f00SJakub Kicinski static const struct jmp_code_map { 135161dd8f00SJakub Kicinski enum br_mask br_mask; 135261dd8f00SJakub Kicinski bool swap; 135361dd8f00SJakub Kicinski } jmp_code_map[] = { 135461dd8f00SJakub Kicinski [BPF_JGT >> 4] = { BR_BLO, true }, 135561dd8f00SJakub Kicinski [BPF_JGE >> 4] = { BR_BHS, false }, 135661dd8f00SJakub Kicinski [BPF_JLT >> 4] = { BR_BLO, false }, 135761dd8f00SJakub Kicinski [BPF_JLE >> 4] = { BR_BHS, true }, 135861dd8f00SJakub Kicinski [BPF_JSGT >> 4] = { BR_BLT, true }, 135961dd8f00SJakub Kicinski [BPF_JSGE >> 4] = { BR_BGE, false }, 136061dd8f00SJakub Kicinski [BPF_JSLT >> 4] = { BR_BLT, false }, 136161dd8f00SJakub Kicinski [BPF_JSLE >> 4] = { BR_BGE, true }, 136261dd8f00SJakub Kicinski }; 136361dd8f00SJakub Kicinski 136461dd8f00SJakub Kicinski static const struct jmp_code_map *nfp_jmp_code_get(struct nfp_insn_meta *meta) 136561dd8f00SJakub Kicinski { 136661dd8f00SJakub Kicinski unsigned int op; 136761dd8f00SJakub Kicinski 136861dd8f00SJakub Kicinski op = BPF_OP(meta->insn.code) >> 4; 136961dd8f00SJakub Kicinski /* br_mask of 0 is BR_BEQ which we don't use in jump code table */ 137061dd8f00SJakub Kicinski if (WARN_ONCE(op >= ARRAY_SIZE(jmp_code_map) || 137161dd8f00SJakub Kicinski !jmp_code_map[op].br_mask, 137261dd8f00SJakub Kicinski "no code found for jump instruction")) 137361dd8f00SJakub Kicinski return NULL; 137461dd8f00SJakub Kicinski 137561dd8f00SJakub Kicinski return &jmp_code_map[op]; 137661dd8f00SJakub Kicinski } 137761dd8f00SJakub Kicinski 137861dd8f00SJakub Kicinski static int cmp_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1379d9ae7f2bSJakub Kicinski { 1380d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1381d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 138261dd8f00SJakub Kicinski const struct jmp_code_map *code; 13837bdc97beSJakub Kicinski enum alu_op alu_op, carry_op; 1384d9ae7f2bSJakub Kicinski u8 reg = insn->dst_reg * 2; 1385b3f868dfSJakub Kicinski swreg tmp_reg; 1386d9ae7f2bSJakub Kicinski 138761dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 138861dd8f00SJakub Kicinski if (!code) 138961dd8f00SJakub Kicinski return -EINVAL; 139061dd8f00SJakub Kicinski 13917bdc97beSJakub Kicinski alu_op = meta->jump_neg_op ? ALU_OP_ADD : ALU_OP_SUB; 13927bdc97beSJakub Kicinski carry_op = meta->jump_neg_op ? ALU_OP_ADD_C : ALU_OP_SUB_C; 13937bdc97beSJakub Kicinski 1394d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 139561dd8f00SJakub Kicinski if (!code->swap) 13967bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(reg), alu_op, tmp_reg); 1397d9ae7f2bSJakub Kicinski else 13987bdc97beSJakub Kicinski emit_alu(nfp_prog, reg_none(), tmp_reg, alu_op, reg_a(reg)); 1399d9ae7f2bSJakub Kicinski 140046144839SJiong Wang if (is_mbpf_jmp64(meta)) { 1401d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 140261dd8f00SJakub Kicinski if (!code->swap) 1403d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 14047bdc97beSJakub Kicinski reg_a(reg + 1), carry_op, tmp_reg); 1405d9ae7f2bSJakub Kicinski else 1406d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 14077bdc97beSJakub Kicinski tmp_reg, carry_op, reg_a(reg + 1)); 140846144839SJiong Wang } 1409d9ae7f2bSJakub Kicinski 141061dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1411d9ae7f2bSJakub Kicinski 1412d9ae7f2bSJakub Kicinski return 0; 1413d9ae7f2bSJakub Kicinski } 1414d9ae7f2bSJakub Kicinski 141561dd8f00SJakub Kicinski static int cmp_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1416d9ae7f2bSJakub Kicinski { 1417d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 141861dd8f00SJakub Kicinski const struct jmp_code_map *code; 141926fa818dSJakub Kicinski u8 areg, breg; 142026fa818dSJakub Kicinski 142161dd8f00SJakub Kicinski code = nfp_jmp_code_get(meta); 142261dd8f00SJakub Kicinski if (!code) 142361dd8f00SJakub Kicinski return -EINVAL; 142461dd8f00SJakub Kicinski 142526fa818dSJakub Kicinski areg = insn->dst_reg * 2; 142626fa818dSJakub Kicinski breg = insn->src_reg * 2; 1427d9ae7f2bSJakub Kicinski 142861dd8f00SJakub Kicinski if (code->swap) { 1429d9ae7f2bSJakub Kicinski areg ^= breg; 1430d9ae7f2bSJakub Kicinski breg ^= areg; 1431d9ae7f2bSJakub Kicinski areg ^= breg; 1432d9ae7f2bSJakub Kicinski } 1433d9ae7f2bSJakub Kicinski 1434d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(areg), ALU_OP_SUB, reg_b(breg)); 143546144839SJiong Wang if (is_mbpf_jmp64(meta)) 1436d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 1437d9ae7f2bSJakub Kicinski reg_a(areg + 1), ALU_OP_SUB_C, reg_b(breg + 1)); 143861dd8f00SJakub Kicinski emit_br(nfp_prog, code->br_mask, insn->off, 0); 1439d9ae7f2bSJakub Kicinski 1440d9ae7f2bSJakub Kicinski return 0; 1441d9ae7f2bSJakub Kicinski } 1442d9ae7f2bSJakub Kicinski 14433119d1fdSJakub Kicinski static void wrp_end32(struct nfp_prog *nfp_prog, swreg reg_in, u8 gpr_out) 14443119d1fdSJakub Kicinski { 14453119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0xf, reg_in, 14463119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 14473119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr_out), 0x5, reg_a(gpr_out), 14483119d1fdSJakub Kicinski SHF_SC_R_ROT, 16); 14493119d1fdSJakub Kicinski } 14503119d1fdSJakub Kicinski 1451d3d23fdbSJiong Wang static void 1452d3d23fdbSJiong Wang wrp_mul_u32(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1453d3d23fdbSJiong Wang swreg rreg, bool gen_high_half) 1454d3d23fdbSJiong Wang { 1455d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1456d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_1, rreg); 1457d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_2, rreg); 1458d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_3, rreg); 1459d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_32x32, MUL_STEP_4, rreg); 1460d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_32x32, MUL_LAST, reg_none()); 1461d3d23fdbSJiong Wang if (gen_high_half) 1462d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_hi, MUL_TYPE_STEP_32x32, MUL_LAST_2, 1463d3d23fdbSJiong Wang reg_none()); 1464d3d23fdbSJiong Wang else 1465d3d23fdbSJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 1466d3d23fdbSJiong Wang } 1467d3d23fdbSJiong Wang 1468d3d23fdbSJiong Wang static void 1469d3d23fdbSJiong Wang wrp_mul_u16(struct nfp_prog *nfp_prog, swreg dst_hi, swreg dst_lo, swreg lreg, 1470d3d23fdbSJiong Wang swreg rreg) 1471d3d23fdbSJiong Wang { 1472d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_START, MUL_STEP_NONE, rreg); 1473d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_1, rreg); 1474d3d23fdbSJiong Wang emit_mul(nfp_prog, lreg, MUL_TYPE_STEP_16x16, MUL_STEP_2, rreg); 1475d3d23fdbSJiong Wang emit_mul(nfp_prog, dst_lo, MUL_TYPE_STEP_16x16, MUL_LAST, reg_none()); 1476d3d23fdbSJiong Wang } 1477d3d23fdbSJiong Wang 1478d3d23fdbSJiong Wang static int 1479d3d23fdbSJiong Wang wrp_mul(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 1480d3d23fdbSJiong Wang bool gen_high_half, bool ropnd_from_reg) 1481d3d23fdbSJiong Wang { 1482d3d23fdbSJiong Wang swreg multiplier, multiplicand, dst_hi, dst_lo; 1483d3d23fdbSJiong Wang const struct bpf_insn *insn = &meta->insn; 1484d3d23fdbSJiong Wang u32 lopnd_max, ropnd_max; 1485d3d23fdbSJiong Wang u8 dst_reg; 1486d3d23fdbSJiong Wang 1487d3d23fdbSJiong Wang dst_reg = insn->dst_reg; 1488d3d23fdbSJiong Wang multiplicand = reg_a(dst_reg * 2); 1489d3d23fdbSJiong Wang dst_hi = reg_both(dst_reg * 2 + 1); 1490d3d23fdbSJiong Wang dst_lo = reg_both(dst_reg * 2); 1491d3d23fdbSJiong Wang lopnd_max = meta->umax_dst; 1492d3d23fdbSJiong Wang if (ropnd_from_reg) { 1493d3d23fdbSJiong Wang multiplier = reg_b(insn->src_reg * 2); 1494d3d23fdbSJiong Wang ropnd_max = meta->umax_src; 1495d3d23fdbSJiong Wang } else { 1496d3d23fdbSJiong Wang u32 imm = insn->imm; 1497d3d23fdbSJiong Wang 1498d3d23fdbSJiong Wang multiplier = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 1499d3d23fdbSJiong Wang ropnd_max = imm; 1500d3d23fdbSJiong Wang } 1501d3d23fdbSJiong Wang if (lopnd_max > U16_MAX || ropnd_max > U16_MAX) 1502d3d23fdbSJiong Wang wrp_mul_u32(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier, 1503d3d23fdbSJiong Wang gen_high_half); 1504d3d23fdbSJiong Wang else 1505d3d23fdbSJiong Wang wrp_mul_u16(nfp_prog, dst_hi, dst_lo, multiplicand, multiplier); 1506d3d23fdbSJiong Wang 1507d3d23fdbSJiong Wang return 0; 1508d3d23fdbSJiong Wang } 1509d3d23fdbSJiong Wang 15102a952b03SJiong Wang static int wrp_div_imm(struct nfp_prog *nfp_prog, u8 dst, u64 imm) 15112a952b03SJiong Wang { 15122a952b03SJiong Wang swreg dst_both = reg_both(dst), dst_a = reg_a(dst), dst_b = reg_a(dst); 15139fb410a8SJiong Wang struct reciprocal_value_adv rvalue; 15149fb410a8SJiong Wang u8 pre_shift, exp; 15152a952b03SJiong Wang swreg magic; 15162a952b03SJiong Wang 15172a952b03SJiong Wang if (imm > U32_MAX) { 15182a952b03SJiong Wang wrp_immed(nfp_prog, dst_both, 0); 15192a952b03SJiong Wang return 0; 15202a952b03SJiong Wang } 15212a952b03SJiong Wang 15229fb410a8SJiong Wang /* NOTE: because we are using "reciprocal_value_adv" which doesn't 15239fb410a8SJiong Wang * support "divisor > (1u << 31)", we need to JIT separate NFP sequence 15249fb410a8SJiong Wang * to handle such case which actually equals to the result of unsigned 15259fb410a8SJiong Wang * comparison "dst >= imm" which could be calculated using the following 15269fb410a8SJiong Wang * NFP sequence: 15279fb410a8SJiong Wang * 15289fb410a8SJiong Wang * alu[--, dst, -, imm] 15299fb410a8SJiong Wang * immed[imm, 0] 15309fb410a8SJiong Wang * alu[dst, imm, +carry, 0] 15319fb410a8SJiong Wang * 15329fb410a8SJiong Wang */ 15339fb410a8SJiong Wang if (imm > 1U << 31) { 15349fb410a8SJiong Wang swreg tmp_b = ur_load_imm_any(nfp_prog, imm, imm_b(nfp_prog)); 15359fb410a8SJiong Wang 15369fb410a8SJiong Wang emit_alu(nfp_prog, reg_none(), dst_a, ALU_OP_SUB, tmp_b); 15379fb410a8SJiong Wang wrp_immed(nfp_prog, imm_a(nfp_prog), 0); 15389fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, imm_a(nfp_prog), ALU_OP_ADD_C, 15399fb410a8SJiong Wang reg_imm(0)); 15409fb410a8SJiong Wang return 0; 15419fb410a8SJiong Wang } 15429fb410a8SJiong Wang 15439fb410a8SJiong Wang rvalue = reciprocal_value_adv(imm, 32); 15449fb410a8SJiong Wang exp = rvalue.exp; 15459fb410a8SJiong Wang if (rvalue.is_wide_m && !(imm & 1)) { 15469fb410a8SJiong Wang pre_shift = fls(imm & -imm) - 1; 15479fb410a8SJiong Wang rvalue = reciprocal_value_adv(imm >> pre_shift, 32 - pre_shift); 15489fb410a8SJiong Wang } else { 15499fb410a8SJiong Wang pre_shift = 0; 15509fb410a8SJiong Wang } 15512a952b03SJiong Wang magic = ur_load_imm_any(nfp_prog, rvalue.m, imm_b(nfp_prog)); 15529fb410a8SJiong Wang if (imm == 1U << exp) { 15532a952b03SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15549fb410a8SJiong Wang SHF_SC_R_SHF, exp); 15559fb410a8SJiong Wang } else if (rvalue.is_wide_m) { 15569fb410a8SJiong Wang wrp_mul_u32(nfp_prog, imm_both(nfp_prog), reg_none(), dst_a, 15579fb410a8SJiong Wang magic, true); 15589fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, dst_a, ALU_OP_SUB, 15599fb410a8SJiong Wang imm_b(nfp_prog)); 15602a952b03SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15619fb410a8SJiong Wang SHF_SC_R_SHF, 1); 15629fb410a8SJiong Wang emit_alu(nfp_prog, dst_both, dst_a, ALU_OP_ADD, 15639fb410a8SJiong Wang imm_b(nfp_prog)); 15649fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, dst_b, 15659fb410a8SJiong Wang SHF_SC_R_SHF, rvalue.sh - 1); 15669fb410a8SJiong Wang } else { 15679fb410a8SJiong Wang if (pre_shift) 15689fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, 15699fb410a8SJiong Wang dst_b, SHF_SC_R_SHF, pre_shift); 15709fb410a8SJiong Wang wrp_mul_u32(nfp_prog, dst_both, reg_none(), dst_a, magic, true); 15719fb410a8SJiong Wang emit_shf(nfp_prog, dst_both, reg_none(), SHF_OP_NONE, 15729fb410a8SJiong Wang dst_b, SHF_SC_R_SHF, rvalue.sh); 15739fb410a8SJiong Wang } 15742a952b03SJiong Wang 15752a952b03SJiong Wang return 0; 15762a952b03SJiong Wang } 15772a952b03SJiong Wang 15780d49eaf4SJakub Kicinski static int adjust_head(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 15790d49eaf4SJakub Kicinski { 15800d49eaf4SJakub Kicinski swreg tmp = imm_a(nfp_prog), tmp_len = imm_b(nfp_prog); 15810d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head *adjust_head; 15820d49eaf4SJakub Kicinski u32 ret_einval, end; 15830d49eaf4SJakub Kicinski 15840d49eaf4SJakub Kicinski adjust_head = &nfp_prog->bpf->adjust_head; 15850d49eaf4SJakub Kicinski 15868231f844SJakub Kicinski /* Optimized version - 5 vs 14 cycles */ 15878231f844SJakub Kicinski if (nfp_prog->adjust_head_location != UINT_MAX) { 15888231f844SJakub Kicinski if (WARN_ON_ONCE(nfp_prog->adjust_head_location != meta->n)) 15898231f844SJakub Kicinski return -EINVAL; 15908231f844SJakub Kicinski 15918231f844SJakub Kicinski emit_alu(nfp_prog, pptr_reg(nfp_prog), 15928231f844SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD, pptr_reg(nfp_prog)); 15938231f844SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 15948231f844SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 15958231f844SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 15968231f844SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 15978231f844SJakub Kicinski 15988231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 15998231f844SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 16008231f844SJakub Kicinski 16018231f844SJakub Kicinski /* TODO: when adjust head is guaranteed to succeed we can 16028231f844SJakub Kicinski * also eliminate the following if (r0 == 0) branch. 16038231f844SJakub Kicinski */ 16048231f844SJakub Kicinski 16058231f844SJakub Kicinski return 0; 16068231f844SJakub Kicinski } 16078231f844SJakub Kicinski 16080d49eaf4SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 14; 16090d49eaf4SJakub Kicinski end = ret_einval + 2; 16100d49eaf4SJakub Kicinski 16110d49eaf4SJakub Kicinski /* We need to use a temp because offset is just a part of the pkt ptr */ 16120d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp, 16130d49eaf4SJakub Kicinski reg_a(2 * 2), ALU_OP_ADD_2B, pptr_reg(nfp_prog)); 16140d49eaf4SJakub Kicinski 16150d49eaf4SJakub Kicinski /* Validate result will fit within FW datapath constraints */ 16160d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16170d49eaf4SJakub Kicinski tmp, ALU_OP_SUB, reg_imm(adjust_head->off_min)); 16180d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 16190d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16200d49eaf4SJakub Kicinski reg_imm(adjust_head->off_max), ALU_OP_SUB, tmp); 16210d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BLO, ret_einval, 0); 16220d49eaf4SJakub Kicinski 16230d49eaf4SJakub Kicinski /* Validate the length is at least ETH_HLEN */ 16240d49eaf4SJakub Kicinski emit_alu(nfp_prog, tmp_len, 16250d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16260d49eaf4SJakub Kicinski emit_alu(nfp_prog, reg_none(), 16270d49eaf4SJakub Kicinski tmp_len, ALU_OP_SUB, reg_imm(ETH_HLEN)); 16280d49eaf4SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 16290d49eaf4SJakub Kicinski 16300d49eaf4SJakub Kicinski /* Load the ret code */ 16310d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 16320d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 16330d49eaf4SJakub Kicinski 16340d49eaf4SJakub Kicinski /* Modify the packet metadata */ 16350d49eaf4SJakub Kicinski emit_ld_field(nfp_prog, pptr_reg(nfp_prog), 0x3, tmp, SHF_SC_NONE, 0); 16360d49eaf4SJakub Kicinski 16370d49eaf4SJakub Kicinski /* Skip over the -EINVAL ret code (defer 2) */ 16382314fe9eSJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 16390d49eaf4SJakub Kicinski 16400d49eaf4SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 16410d49eaf4SJakub Kicinski plen_reg(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16420d49eaf4SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 16430d49eaf4SJakub Kicinski pv_len(nfp_prog), ALU_OP_SUB, reg_a(2 * 2)); 16440d49eaf4SJakub Kicinski 16450d49eaf4SJakub Kicinski /* return -EINVAL target */ 16460d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 16470d49eaf4SJakub Kicinski return -EINVAL; 16480d49eaf4SJakub Kicinski 16490d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 16500d49eaf4SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 16510d49eaf4SJakub Kicinski 16520d49eaf4SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 16530d49eaf4SJakub Kicinski return -EINVAL; 16540d49eaf4SJakub Kicinski 16550d49eaf4SJakub Kicinski return 0; 16560d49eaf4SJakub Kicinski } 16570d49eaf4SJakub Kicinski 16580c261593SJakub Kicinski static int adjust_tail(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 16590c261593SJakub Kicinski { 16600c261593SJakub Kicinski u32 ret_einval, end; 16610c261593SJakub Kicinski swreg plen, delta; 16620c261593SJakub Kicinski 16630c261593SJakub Kicinski BUILD_BUG_ON(plen_reg(nfp_prog) != reg_b(STATIC_REG_PKT_LEN)); 16640c261593SJakub Kicinski 16650c261593SJakub Kicinski plen = imm_a(nfp_prog); 16660c261593SJakub Kicinski delta = reg_a(2 * 2); 16670c261593SJakub Kicinski 16680c261593SJakub Kicinski ret_einval = nfp_prog_current_offset(nfp_prog) + 9; 16690c261593SJakub Kicinski end = nfp_prog_current_offset(nfp_prog) + 11; 16700c261593SJakub Kicinski 16710c261593SJakub Kicinski /* Calculate resulting length */ 16720c261593SJakub Kicinski emit_alu(nfp_prog, plen, plen_reg(nfp_prog), ALU_OP_ADD, delta); 16730c261593SJakub Kicinski /* delta == 0 is not allowed by the kernel, add must overflow to make 16740c261593SJakub Kicinski * length smaller. 16750c261593SJakub Kicinski */ 16760c261593SJakub Kicinski emit_br(nfp_prog, BR_BCC, ret_einval, 0); 16770c261593SJakub Kicinski 16780c261593SJakub Kicinski /* if (new_len < 14) then -EINVAL */ 16790c261593SJakub Kicinski emit_alu(nfp_prog, reg_none(), plen, ALU_OP_SUB, reg_imm(ETH_HLEN)); 16800c261593SJakub Kicinski emit_br(nfp_prog, BR_BMI, ret_einval, 0); 16810c261593SJakub Kicinski 16820c261593SJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 16830c261593SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, delta); 16840c261593SJakub Kicinski emit_alu(nfp_prog, pv_len(nfp_prog), 16850c261593SJakub Kicinski pv_len(nfp_prog), ALU_OP_ADD, delta); 16860c261593SJakub Kicinski 16870c261593SJakub Kicinski emit_br(nfp_prog, BR_UNC, end, 2); 16880c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), 0); 16890c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), 0); 16900c261593SJakub Kicinski 16910c261593SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_einval)) 16920c261593SJakub Kicinski return -EINVAL; 16930c261593SJakub Kicinski 16940c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(0), -22); 16950c261593SJakub Kicinski wrp_immed(nfp_prog, reg_both(1), ~0); 16960c261593SJakub Kicinski 16970c261593SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, end)) 16980c261593SJakub Kicinski return -EINVAL; 16990c261593SJakub Kicinski 17000c261593SJakub Kicinski return 0; 17010c261593SJakub Kicinski } 17020c261593SJakub Kicinski 170377a3d311SJakub Kicinski static int 1704fc448497SJakub Kicinski map_call_stack_common(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 170577a3d311SJakub Kicinski { 170677a3d311SJakub Kicinski bool load_lm_ptr; 170777a3d311SJakub Kicinski u32 ret_tgt; 170877a3d311SJakub Kicinski s64 lm_off; 170977a3d311SJakub Kicinski 171077a3d311SJakub Kicinski /* We only have to reload LM0 if the key is not at start of stack */ 17111a7e62e6SQuentin Monnet lm_off = nfp_prog->stack_frame_depth; 17122f46e0c1SJakub Kicinski lm_off += meta->arg2.reg.var_off.value + meta->arg2.reg.off; 17132f46e0c1SJakub Kicinski load_lm_ptr = meta->arg2.var_off || lm_off; 171477a3d311SJakub Kicinski 171577a3d311SJakub Kicinski /* Set LM0 to start of key */ 171677a3d311SJakub Kicinski if (load_lm_ptr) 171777a3d311SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(2 * 2), NFP_CSR_ACT_LM_ADDR0); 171844d65a47SJakub Kicinski if (meta->func_id == BPF_FUNC_map_update_elem) 171944d65a47SJakub Kicinski emit_csr_wr(nfp_prog, reg_b(3 * 2), NFP_CSR_ACT_LM_ADDR2); 172077a3d311SJakub Kicinski 1721fc448497SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 172277a3d311SJakub Kicinski 2, RELO_BR_HELPER); 172377a3d311SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 172477a3d311SJakub Kicinski 172577a3d311SJakub Kicinski /* Load map ID into A0 */ 1726b4264c96SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), reg_a(2)); 172777a3d311SJakub Kicinski 172877a3d311SJakub Kicinski /* Load the return address into B0 */ 172977a3d311SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 173077a3d311SJakub Kicinski 173177a3d311SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 173277a3d311SJakub Kicinski return -EINVAL; 173377a3d311SJakub Kicinski 173477a3d311SJakub Kicinski /* Reset the LM0 pointer */ 173577a3d311SJakub Kicinski if (!load_lm_ptr) 173677a3d311SJakub Kicinski return 0; 173777a3d311SJakub Kicinski 173877a3d311SJakub Kicinski emit_csr_wr(nfp_prog, stack_reg(nfp_prog), NFP_CSR_ACT_LM_ADDR0); 173977a3d311SJakub Kicinski wrp_nops(nfp_prog, 3); 174077a3d311SJakub Kicinski 174177a3d311SJakub Kicinski return 0; 174277a3d311SJakub Kicinski } 174377a3d311SJakub Kicinski 1744df4a37d8SJakub Kicinski static int 1745df4a37d8SJakub Kicinski nfp_get_prandom_u32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1746df4a37d8SJakub Kicinski { 1747df4a37d8SJakub Kicinski __emit_csr_rd(nfp_prog, NFP_CSR_PSEUDO_RND_NUM); 1748df4a37d8SJakub Kicinski /* CSR value is read in following immed[gpr, 0] */ 1749df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(0), 0, 1750df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1751df4a37d8SJakub Kicinski emit_immed(nfp_prog, reg_both(1), 0, 1752df4a37d8SJakub Kicinski IMMED_WIDTH_ALL, false, IMMED_SHIFT_0B); 1753df4a37d8SJakub Kicinski return 0; 1754df4a37d8SJakub Kicinski } 1755df4a37d8SJakub Kicinski 17569816dd35SJakub Kicinski static int 17579816dd35SJakub Kicinski nfp_perf_event_output(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 17589816dd35SJakub Kicinski { 17599816dd35SJakub Kicinski swreg ptr_type; 17609816dd35SJakub Kicinski u32 ret_tgt; 17619816dd35SJakub Kicinski 17629816dd35SJakub Kicinski ptr_type = ur_load_imm_any(nfp_prog, meta->arg1.type, imm_a(nfp_prog)); 17639816dd35SJakub Kicinski 17649816dd35SJakub Kicinski ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 17659816dd35SJakub Kicinski 17669816dd35SJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO + meta->func_id, 17679816dd35SJakub Kicinski 2, RELO_BR_HELPER); 17689816dd35SJakub Kicinski 17699816dd35SJakub Kicinski /* Load ptr type into A1 */ 17709816dd35SJakub Kicinski wrp_mov(nfp_prog, reg_a(1), ptr_type); 17719816dd35SJakub Kicinski 17729816dd35SJakub Kicinski /* Load the return address into B0 */ 17739816dd35SJakub Kicinski wrp_immed_relo(nfp_prog, reg_b(0), ret_tgt, RELO_IMMED_REL); 17749816dd35SJakub Kicinski 17759816dd35SJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 17769816dd35SJakub Kicinski return -EINVAL; 17779816dd35SJakub Kicinski 17789816dd35SJakub Kicinski return 0; 17799816dd35SJakub Kicinski } 17809816dd35SJakub Kicinski 1781d985888fSJakub Kicinski static int 1782d985888fSJakub Kicinski nfp_queue_select(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1783d985888fSJakub Kicinski { 1784d985888fSJakub Kicinski u32 jmp_tgt; 1785d985888fSJakub Kicinski 1786d985888fSJakub Kicinski jmp_tgt = nfp_prog_current_offset(nfp_prog) + 5; 1787d985888fSJakub Kicinski 1788d985888fSJakub Kicinski /* Make sure the queue id fits into FW field */ 1789d985888fSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(meta->insn.src_reg * 2), 1790d985888fSJakub Kicinski ALU_OP_AND_NOT_B, reg_imm(0xff)); 1791d985888fSJakub Kicinski emit_br(nfp_prog, BR_BEQ, jmp_tgt, 2); 1792d985888fSJakub Kicinski 1793d985888fSJakub Kicinski /* Set the 'queue selected' bit and the queue value */ 1794d985888fSJakub Kicinski emit_shf(nfp_prog, pv_qsel_set(nfp_prog), 1795d985888fSJakub Kicinski pv_qsel_set(nfp_prog), SHF_OP_OR, reg_imm(1), 1796d985888fSJakub Kicinski SHF_SC_L_SHF, PKT_VEL_QSEL_SET_BIT); 1797d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1798d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_b(meta->insn.src_reg * 2), 1799d985888fSJakub Kicinski SHF_SC_NONE, 0); 1800d985888fSJakub Kicinski /* Delay slots end here, we will jump over next instruction if queue 1801d985888fSJakub Kicinski * value fits into the field. 1802d985888fSJakub Kicinski */ 1803d985888fSJakub Kicinski emit_ld_field(nfp_prog, 1804d985888fSJakub Kicinski pv_qsel_val(nfp_prog), 0x1, reg_imm(NFP_NET_RXR_MAX), 1805d985888fSJakub Kicinski SHF_SC_NONE, 0); 1806d985888fSJakub Kicinski 1807d985888fSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, jmp_tgt)) 1808d985888fSJakub Kicinski return -EINVAL; 1809d985888fSJakub Kicinski 1810d985888fSJakub Kicinski return 0; 1811d985888fSJakub Kicinski } 1812d985888fSJakub Kicinski 1813d9ae7f2bSJakub Kicinski /* --- Callbacks --- */ 1814d9ae7f2bSJakub Kicinski static int mov_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1815d9ae7f2bSJakub Kicinski { 1816d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1817b14157eeSJakub Kicinski u8 dst = insn->dst_reg * 2; 1818b14157eeSJakub Kicinski u8 src = insn->src_reg * 2; 1819d9ae7f2bSJakub Kicinski 1820b14157eeSJakub Kicinski if (insn->src_reg == BPF_REG_10) { 1821b14157eeSJakub Kicinski swreg stack_depth_reg; 1822b14157eeSJakub Kicinski 1823b14157eeSJakub Kicinski stack_depth_reg = ur_load_imm_any(nfp_prog, 18241a7e62e6SQuentin Monnet nfp_prog->stack_frame_depth, 1825b14157eeSJakub Kicinski stack_imm(nfp_prog)); 18261a7e62e6SQuentin Monnet emit_alu(nfp_prog, reg_both(dst), stack_reg(nfp_prog), 18271a7e62e6SQuentin Monnet ALU_OP_ADD, stack_depth_reg); 1828b14157eeSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 1829b14157eeSJakub Kicinski } else { 1830b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst, src); 1831b14157eeSJakub Kicinski wrp_reg_mov(nfp_prog, dst + 1, src + 1); 1832b14157eeSJakub Kicinski } 1833d9ae7f2bSJakub Kicinski 1834d9ae7f2bSJakub Kicinski return 0; 1835d9ae7f2bSJakub Kicinski } 1836d9ae7f2bSJakub Kicinski 1837d9ae7f2bSJakub Kicinski static int mov_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1838d9ae7f2bSJakub Kicinski { 1839d9ae7f2bSJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 1840d9ae7f2bSJakub Kicinski 1841d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2), imm & ~0U); 1842d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), imm >> 32); 1843d9ae7f2bSJakub Kicinski 1844d9ae7f2bSJakub Kicinski return 0; 1845d9ae7f2bSJakub Kicinski } 1846d9ae7f2bSJakub Kicinski 1847d9ae7f2bSJakub Kicinski static int xor_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1848d9ae7f2bSJakub Kicinski { 1849d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_XOR); 1850d9ae7f2bSJakub Kicinski } 1851d9ae7f2bSJakub Kicinski 1852d9ae7f2bSJakub Kicinski static int xor_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1853d9ae7f2bSJakub Kicinski { 1854d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_XOR, !meta->insn.imm); 1855d9ae7f2bSJakub Kicinski } 1856d9ae7f2bSJakub Kicinski 1857d9ae7f2bSJakub Kicinski static int and_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1858d9ae7f2bSJakub Kicinski { 1859d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_AND); 1860d9ae7f2bSJakub Kicinski } 1861d9ae7f2bSJakub Kicinski 1862d9ae7f2bSJakub Kicinski static int and_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1863d9ae7f2bSJakub Kicinski { 1864d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_AND, !~meta->insn.imm); 1865d9ae7f2bSJakub Kicinski } 1866d9ae7f2bSJakub Kicinski 1867d9ae7f2bSJakub Kicinski static int or_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1868d9ae7f2bSJakub Kicinski { 1869d9ae7f2bSJakub Kicinski return wrp_alu64_reg(nfp_prog, meta, ALU_OP_OR); 1870d9ae7f2bSJakub Kicinski } 1871d9ae7f2bSJakub Kicinski 1872d9ae7f2bSJakub Kicinski static int or_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1873d9ae7f2bSJakub Kicinski { 1874d9ae7f2bSJakub Kicinski return wrp_alu64_imm(nfp_prog, meta, ALU_OP_OR, !meta->insn.imm); 1875d9ae7f2bSJakub Kicinski } 1876d9ae7f2bSJakub Kicinski 1877d9ae7f2bSJakub Kicinski static int add_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1878d9ae7f2bSJakub Kicinski { 1879d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1880d9ae7f2bSJakub Kicinski 1881d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1882d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_ADD, 1883d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1884d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1885d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_ADD_C, 1886d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1887d9ae7f2bSJakub Kicinski 1888d9ae7f2bSJakub Kicinski return 0; 1889d9ae7f2bSJakub Kicinski } 1890d9ae7f2bSJakub Kicinski 1891d9ae7f2bSJakub Kicinski static int add_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1892d9ae7f2bSJakub Kicinski { 1893d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1894d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1895d9ae7f2bSJakub Kicinski 1896d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_ADD, imm & ~0U); 1897d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_ADD_C, imm >> 32); 1898d9ae7f2bSJakub Kicinski 1899d9ae7f2bSJakub Kicinski return 0; 1900d9ae7f2bSJakub Kicinski } 1901d9ae7f2bSJakub Kicinski 1902d9ae7f2bSJakub Kicinski static int sub_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1903d9ae7f2bSJakub Kicinski { 1904d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1905d9ae7f2bSJakub Kicinski 1906d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), 1907d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_SUB, 1908d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2)); 1909d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 1910d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_SUB_C, 1911d9ae7f2bSJakub Kicinski reg_b(insn->src_reg * 2 + 1)); 1912d9ae7f2bSJakub Kicinski 1913d9ae7f2bSJakub Kicinski return 0; 1914d9ae7f2bSJakub Kicinski } 1915d9ae7f2bSJakub Kicinski 1916d9ae7f2bSJakub Kicinski static int sub_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1917d9ae7f2bSJakub Kicinski { 1918d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 1919d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 1920d9ae7f2bSJakub Kicinski 1921d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2, ALU_OP_SUB, imm & ~0U); 1922d9ae7f2bSJakub Kicinski wrp_alu_imm(nfp_prog, insn->dst_reg * 2 + 1, ALU_OP_SUB_C, imm >> 32); 1923d9ae7f2bSJakub Kicinski 1924d9ae7f2bSJakub Kicinski return 0; 1925d9ae7f2bSJakub Kicinski } 1926d9ae7f2bSJakub Kicinski 1927d3d23fdbSJiong Wang static int mul_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1928d3d23fdbSJiong Wang { 1929d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, true); 1930d3d23fdbSJiong Wang } 1931d3d23fdbSJiong Wang 1932d3d23fdbSJiong Wang static int mul_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1933d3d23fdbSJiong Wang { 1934d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, true, false); 1935d3d23fdbSJiong Wang } 1936d3d23fdbSJiong Wang 19372a952b03SJiong Wang static int div_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19382a952b03SJiong Wang { 19392a952b03SJiong Wang const struct bpf_insn *insn = &meta->insn; 19402a952b03SJiong Wang 19412a952b03SJiong Wang return wrp_div_imm(nfp_prog, insn->dst_reg * 2, insn->imm); 19422a952b03SJiong Wang } 19432a952b03SJiong Wang 19442a952b03SJiong Wang static int div_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 19452a952b03SJiong Wang { 19462a952b03SJiong Wang /* NOTE: verifier hook has rejected cases for which verifier doesn't 19472a952b03SJiong Wang * know whether the source operand is constant or not. 19482a952b03SJiong Wang */ 19492a952b03SJiong Wang return wrp_div_imm(nfp_prog, meta->insn.dst_reg * 2, meta->umin_src); 19502a952b03SJiong Wang } 19512a952b03SJiong Wang 1952254ef4d7SJiong Wang static int neg_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1953254ef4d7SJiong Wang { 1954254ef4d7SJiong Wang const struct bpf_insn *insn = &meta->insn; 1955254ef4d7SJiong Wang 1956254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2), reg_imm(0), 1957254ef4d7SJiong Wang ALU_OP_SUB, reg_b(insn->dst_reg * 2)); 1958254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(insn->dst_reg * 2 + 1), reg_imm(0), 1959254ef4d7SJiong Wang ALU_OP_SUB_C, reg_b(insn->dst_reg * 2 + 1)); 1960254ef4d7SJiong Wang 1961254ef4d7SJiong Wang return 0; 1962254ef4d7SJiong Wang } 1963254ef4d7SJiong Wang 1964991f5b36SJiong Wang /* Pseudo code: 1965991f5b36SJiong Wang * if shift_amt >= 32 1966991f5b36SJiong Wang * dst_high = dst_low << shift_amt[4:0] 1967991f5b36SJiong Wang * dst_low = 0; 1968991f5b36SJiong Wang * else 1969991f5b36SJiong Wang * dst_high = (dst_high, dst_low) >> (32 - shift_amt) 1970991f5b36SJiong Wang * dst_low = dst_low << shift_amt 1971991f5b36SJiong Wang * 1972991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 1973991f5b36SJiong Wang */ 1974991f5b36SJiong Wang static int __shl_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 1975991f5b36SJiong Wang { 1976db0a4b3bSJiong Wang if (!shift_amt) 1977db0a4b3bSJiong Wang return 0; 1978db0a4b3bSJiong Wang 1979991f5b36SJiong Wang if (shift_amt < 32) { 1980991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), 1981991f5b36SJiong Wang SHF_OP_NONE, reg_b(dst), SHF_SC_R_DSHF, 1982991f5b36SJiong Wang 32 - shift_amt); 1983991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 1984991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 1985991f5b36SJiong Wang } else if (shift_amt == 32) { 1986991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst + 1, dst); 1987991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1988991f5b36SJiong Wang } else if (shift_amt > 32) { 1989991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 1990991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt - 32); 1991991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst), 0); 1992991f5b36SJiong Wang } 1993991f5b36SJiong Wang 1994991f5b36SJiong Wang return 0; 1995991f5b36SJiong Wang } 1996991f5b36SJiong Wang 1997d9ae7f2bSJakub Kicinski static int shl_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 1998d9ae7f2bSJakub Kicinski { 1999d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 20003cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 2001d9ae7f2bSJakub Kicinski 2002991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, insn->imm); 2003991f5b36SJiong Wang } 2004991f5b36SJiong Wang 2005991f5b36SJiong Wang static void shl_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2006991f5b36SJiong Wang { 2007991f5b36SJiong Wang emit_alu(nfp_prog, imm_both(nfp_prog), reg_imm(32), ALU_OP_SUB, 2008991f5b36SJiong Wang reg_b(src)); 2009991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, reg_imm(0)); 2010991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_a(dst + 1), SHF_OP_NONE, 2011991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 2012991f5b36SJiong Wang } 2013991f5b36SJiong Wang 2014991f5b36SJiong Wang /* NOTE: for indirect left shift, HIGH part should be calculated first. */ 2015991f5b36SJiong Wang static void shl_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2016991f5b36SJiong Wang { 2017991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2018991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2019991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 2020991f5b36SJiong Wang } 2021991f5b36SJiong Wang 2022991f5b36SJiong Wang static void shl_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2023991f5b36SJiong Wang { 2024991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 2025991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2026991f5b36SJiong Wang } 2027991f5b36SJiong Wang 2028991f5b36SJiong Wang static void shl_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2029991f5b36SJiong Wang { 2030991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2031991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2032991f5b36SJiong Wang reg_b(dst), SHF_SC_L_SHF); 20333cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), 0); 2034991f5b36SJiong Wang } 2035991f5b36SJiong Wang 2036991f5b36SJiong Wang static int shl_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2037991f5b36SJiong Wang { 2038991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2039991f5b36SJiong Wang u64 umin, umax; 2040991f5b36SJiong Wang u8 dst, src; 2041991f5b36SJiong Wang 2042991f5b36SJiong Wang dst = insn->dst_reg * 2; 2043662c5472SJiong Wang umin = meta->umin_src; 2044662c5472SJiong Wang umax = meta->umax_src; 2045991f5b36SJiong Wang if (umin == umax) 2046991f5b36SJiong Wang return __shl_imm64(nfp_prog, dst, umin); 2047991f5b36SJiong Wang 2048991f5b36SJiong Wang src = insn->src_reg * 2; 2049991f5b36SJiong Wang if (umax < 32) { 2050991f5b36SJiong Wang shl_reg64_lt32(nfp_prog, dst, src); 2051991f5b36SJiong Wang } else if (umin >= 32) { 2052991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 2053991f5b36SJiong Wang } else { 2054991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2055991f5b36SJiong Wang * value of shift amount. 2056991f5b36SJiong Wang */ 2057991f5b36SJiong Wang u16 label_ge32, label_end; 2058991f5b36SJiong Wang 2059991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 7; 2060991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2061991f5b36SJiong Wang 2062991f5b36SJiong Wang shl_reg64_lt32_high(nfp_prog, dst, src); 2063991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2064991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2065991f5b36SJiong Wang /* shl_reg64_lt32_low packed in delay slot. */ 2066991f5b36SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2067991f5b36SJiong Wang 2068991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2069991f5b36SJiong Wang return -EINVAL; 2070991f5b36SJiong Wang shl_reg64_ge32(nfp_prog, dst, src); 2071991f5b36SJiong Wang 2072991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2073991f5b36SJiong Wang return -EINVAL; 2074991f5b36SJiong Wang } 2075991f5b36SJiong Wang 2076991f5b36SJiong Wang return 0; 2077991f5b36SJiong Wang } 2078991f5b36SJiong Wang 2079991f5b36SJiong Wang /* Pseudo code: 2080991f5b36SJiong Wang * if shift_amt >= 32 2081991f5b36SJiong Wang * dst_high = 0; 2082991f5b36SJiong Wang * dst_low = dst_high >> shift_amt[4:0] 2083991f5b36SJiong Wang * else 2084991f5b36SJiong Wang * dst_high = dst_high >> shift_amt 2085991f5b36SJiong Wang * dst_low = (dst_high, dst_low) >> shift_amt 2086991f5b36SJiong Wang * 2087991f5b36SJiong Wang * The indirect shift will use the same logic at runtime. 2088991f5b36SJiong Wang */ 2089991f5b36SJiong Wang static int __shr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2090991f5b36SJiong Wang { 2091db0a4b3bSJiong Wang if (!shift_amt) 2092db0a4b3bSJiong Wang return 0; 2093db0a4b3bSJiong Wang 2094991f5b36SJiong Wang if (shift_amt < 32) { 2095991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2096991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2097991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2098991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2099991f5b36SJiong Wang } else if (shift_amt == 32) { 2100991f5b36SJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2101991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2102991f5b36SJiong Wang } else if (shift_amt > 32) { 2103991f5b36SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2104991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2105991f5b36SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 21063cae1319SJakub Kicinski } 2107d9ae7f2bSJakub Kicinski 2108d9ae7f2bSJakub Kicinski return 0; 2109d9ae7f2bSJakub Kicinski } 2110d9ae7f2bSJakub Kicinski 2111d9ae7f2bSJakub Kicinski static int shr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2112d9ae7f2bSJakub Kicinski { 2113d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 21143cae1319SJakub Kicinski u8 dst = insn->dst_reg * 2; 2115d9ae7f2bSJakub Kicinski 2116991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, insn->imm); 2117991f5b36SJiong Wang } 2118991f5b36SJiong Wang 2119991f5b36SJiong Wang /* NOTE: for indirect right shift, LOW part should be calculated first. */ 2120991f5b36SJiong Wang static void shr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2121991f5b36SJiong Wang { 2122991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2123991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_NONE, 2124991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2125991f5b36SJiong Wang } 2126991f5b36SJiong Wang 2127991f5b36SJiong Wang static void shr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2128991f5b36SJiong Wang { 2129991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2130991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2131991f5b36SJiong Wang reg_b(dst), SHF_SC_R_DSHF); 2132991f5b36SJiong Wang } 2133991f5b36SJiong Wang 2134991f5b36SJiong Wang static void shr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2135991f5b36SJiong Wang { 2136991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2137991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2138991f5b36SJiong Wang } 2139991f5b36SJiong Wang 2140991f5b36SJiong Wang static void shr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2141991f5b36SJiong Wang { 2142991f5b36SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2143991f5b36SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2144991f5b36SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 21453cae1319SJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2146991f5b36SJiong Wang } 2147991f5b36SJiong Wang 2148991f5b36SJiong Wang static int shr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2149991f5b36SJiong Wang { 2150991f5b36SJiong Wang const struct bpf_insn *insn = &meta->insn; 2151991f5b36SJiong Wang u64 umin, umax; 2152991f5b36SJiong Wang u8 dst, src; 2153991f5b36SJiong Wang 2154991f5b36SJiong Wang dst = insn->dst_reg * 2; 2155662c5472SJiong Wang umin = meta->umin_src; 2156662c5472SJiong Wang umax = meta->umax_src; 2157991f5b36SJiong Wang if (umin == umax) 2158991f5b36SJiong Wang return __shr_imm64(nfp_prog, dst, umin); 2159991f5b36SJiong Wang 2160991f5b36SJiong Wang src = insn->src_reg * 2; 2161991f5b36SJiong Wang if (umax < 32) { 2162991f5b36SJiong Wang shr_reg64_lt32(nfp_prog, dst, src); 2163991f5b36SJiong Wang } else if (umin >= 32) { 2164991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2165991f5b36SJiong Wang } else { 2166991f5b36SJiong Wang /* Generate different instruction sequences depending on runtime 2167991f5b36SJiong Wang * value of shift amount. 2168991f5b36SJiong Wang */ 2169991f5b36SJiong Wang u16 label_ge32, label_end; 2170991f5b36SJiong Wang 2171991f5b36SJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2172991f5b36SJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2173991f5b36SJiong Wang shr_reg64_lt32_low(nfp_prog, dst, src); 2174991f5b36SJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2175991f5b36SJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2176991f5b36SJiong Wang /* shr_reg64_lt32_high packed in delay slot. */ 2177991f5b36SJiong Wang shr_reg64_lt32_high(nfp_prog, dst, src); 2178991f5b36SJiong Wang 2179991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2180991f5b36SJiong Wang return -EINVAL; 2181991f5b36SJiong Wang shr_reg64_ge32(nfp_prog, dst, src); 2182991f5b36SJiong Wang 2183991f5b36SJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2184991f5b36SJiong Wang return -EINVAL; 21853cae1319SJakub Kicinski } 2186d9ae7f2bSJakub Kicinski 2187d9ae7f2bSJakub Kicinski return 0; 2188d9ae7f2bSJakub Kicinski } 2189d9ae7f2bSJakub Kicinski 2190f43d0f17SJiong Wang /* Code logic is the same as __shr_imm64 except ashr requires signedness bit 2191f43d0f17SJiong Wang * told through PREV_ALU result. 2192f43d0f17SJiong Wang */ 2193c217abccSJiong Wang static int __ashr_imm64(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2194c217abccSJiong Wang { 2195db0a4b3bSJiong Wang if (!shift_amt) 2196db0a4b3bSJiong Wang return 0; 2197db0a4b3bSJiong Wang 2198c217abccSJiong Wang if (shift_amt < 32) { 2199c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_a(dst + 1), SHF_OP_NONE, 2200c217abccSJiong Wang reg_b(dst), SHF_SC_R_DSHF, shift_amt); 2201c217abccSJiong Wang /* Set signedness bit. */ 2202c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2203c217abccSJiong Wang reg_imm(0)); 2204c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2205c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt); 2206c217abccSJiong Wang } else if (shift_amt == 32) { 2207c217abccSJiong Wang /* NOTE: this also helps setting signedness bit. */ 2208c217abccSJiong Wang wrp_reg_mov(nfp_prog, dst, dst + 1); 2209c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2210c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2211c217abccSJiong Wang } else if (shift_amt > 32) { 2212c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst + 1), ALU_OP_OR, 2213c217abccSJiong Wang reg_imm(0)); 2214c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2215c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, shift_amt - 32); 2216c217abccSJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2217c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2218c217abccSJiong Wang } 2219c217abccSJiong Wang 2220c217abccSJiong Wang return 0; 2221c217abccSJiong Wang } 2222c217abccSJiong Wang 2223f43d0f17SJiong Wang static int ashr_imm64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2224f43d0f17SJiong Wang { 2225f43d0f17SJiong Wang const struct bpf_insn *insn = &meta->insn; 2226f43d0f17SJiong Wang u8 dst = insn->dst_reg * 2; 2227f43d0f17SJiong Wang 2228c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, insn->imm); 2229c217abccSJiong Wang } 2230c217abccSJiong Wang 2231c217abccSJiong Wang static void ashr_reg64_lt32_high(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2232c217abccSJiong Wang { 2233c217abccSJiong Wang /* NOTE: the first insn will set both indirect shift amount (source A) 2234c217abccSJiong Wang * and signedness bit (MSB of result). 2235c217abccSJiong Wang */ 2236c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2237c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2238c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2239c217abccSJiong Wang } 2240c217abccSJiong Wang 2241c217abccSJiong Wang static void ashr_reg64_lt32_low(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2242c217abccSJiong Wang { 2243c217abccSJiong Wang /* NOTE: it is the same as logic shift because we don't need to shift in 2244c217abccSJiong Wang * signedness bit when the shift amount is less than 32. 2245c217abccSJiong Wang */ 2246c217abccSJiong Wang return shr_reg64_lt32_low(nfp_prog, dst, src); 2247c217abccSJiong Wang } 2248c217abccSJiong Wang 2249c217abccSJiong Wang static void ashr_reg64_lt32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2250c217abccSJiong Wang { 2251c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2252c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2253c217abccSJiong Wang } 2254c217abccSJiong Wang 2255c217abccSJiong Wang static void ashr_reg64_ge32(struct nfp_prog *nfp_prog, u8 dst, u8 src) 2256c217abccSJiong Wang { 2257c217abccSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst + 1)); 2258c217abccSJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2259c217abccSJiong Wang reg_b(dst + 1), SHF_SC_R_SHF); 2260f43d0f17SJiong Wang emit_shf(nfp_prog, reg_both(dst + 1), reg_none(), SHF_OP_ASHR, 2261f43d0f17SJiong Wang reg_b(dst + 1), SHF_SC_R_SHF, 31); 2262c217abccSJiong Wang } 2263c217abccSJiong Wang 2264c217abccSJiong Wang /* Like ashr_imm64, but need to use indirect shift. */ 2265c217abccSJiong Wang static int ashr_reg64(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2266c217abccSJiong Wang { 2267c217abccSJiong Wang const struct bpf_insn *insn = &meta->insn; 2268c217abccSJiong Wang u64 umin, umax; 2269c217abccSJiong Wang u8 dst, src; 2270c217abccSJiong Wang 2271c217abccSJiong Wang dst = insn->dst_reg * 2; 2272662c5472SJiong Wang umin = meta->umin_src; 2273662c5472SJiong Wang umax = meta->umax_src; 2274c217abccSJiong Wang if (umin == umax) 2275c217abccSJiong Wang return __ashr_imm64(nfp_prog, dst, umin); 2276c217abccSJiong Wang 2277c217abccSJiong Wang src = insn->src_reg * 2; 2278c217abccSJiong Wang if (umax < 32) { 2279c217abccSJiong Wang ashr_reg64_lt32(nfp_prog, dst, src); 2280c217abccSJiong Wang } else if (umin >= 32) { 2281c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2282c217abccSJiong Wang } else { 2283c217abccSJiong Wang u16 label_ge32, label_end; 2284c217abccSJiong Wang 2285c217abccSJiong Wang label_ge32 = nfp_prog_current_offset(nfp_prog) + 6; 2286c217abccSJiong Wang emit_br_bset(nfp_prog, reg_a(src), 5, label_ge32, 0); 2287c217abccSJiong Wang ashr_reg64_lt32_low(nfp_prog, dst, src); 2288c217abccSJiong Wang label_end = nfp_prog_current_offset(nfp_prog) + 6; 2289c217abccSJiong Wang emit_br(nfp_prog, BR_UNC, label_end, 2); 2290c217abccSJiong Wang /* ashr_reg64_lt32_high packed in delay slot. */ 2291c217abccSJiong Wang ashr_reg64_lt32_high(nfp_prog, dst, src); 2292c217abccSJiong Wang 2293c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_ge32)) 2294c217abccSJiong Wang return -EINVAL; 2295c217abccSJiong Wang ashr_reg64_ge32(nfp_prog, dst, src); 2296c217abccSJiong Wang 2297c217abccSJiong Wang if (!nfp_prog_confirm_current_offset(nfp_prog, label_end)) 2298c217abccSJiong Wang return -EINVAL; 2299f43d0f17SJiong Wang } 2300f43d0f17SJiong Wang 2301f43d0f17SJiong Wang return 0; 2302f43d0f17SJiong Wang } 2303f43d0f17SJiong Wang 2304d9ae7f2bSJakub Kicinski static int mov_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2305d9ae7f2bSJakub Kicinski { 2306d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2307d9ae7f2bSJakub Kicinski 2308d9ae7f2bSJakub Kicinski wrp_reg_mov(nfp_prog, insn->dst_reg * 2, insn->src_reg * 2); 2309d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2310d9ae7f2bSJakub Kicinski 2311d9ae7f2bSJakub Kicinski return 0; 2312d9ae7f2bSJakub Kicinski } 2313d9ae7f2bSJakub Kicinski 2314d9ae7f2bSJakub Kicinski static int mov_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2315d9ae7f2bSJakub Kicinski { 2316d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2317d9ae7f2bSJakub Kicinski 2318d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2), insn->imm); 2319d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_both(insn->dst_reg * 2 + 1), 0); 2320d9ae7f2bSJakub Kicinski 2321d9ae7f2bSJakub Kicinski return 0; 2322d9ae7f2bSJakub Kicinski } 2323d9ae7f2bSJakub Kicinski 2324d9ae7f2bSJakub Kicinski static int xor_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2325d9ae7f2bSJakub Kicinski { 2326d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_XOR); 2327d9ae7f2bSJakub Kicinski } 2328d9ae7f2bSJakub Kicinski 2329d9ae7f2bSJakub Kicinski static int xor_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2330d9ae7f2bSJakub Kicinski { 2331f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_XOR); 2332d9ae7f2bSJakub Kicinski } 2333d9ae7f2bSJakub Kicinski 2334d9ae7f2bSJakub Kicinski static int and_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2335d9ae7f2bSJakub Kicinski { 2336d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_AND); 2337d9ae7f2bSJakub Kicinski } 2338d9ae7f2bSJakub Kicinski 2339d9ae7f2bSJakub Kicinski static int and_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2340d9ae7f2bSJakub Kicinski { 2341f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_AND); 2342d9ae7f2bSJakub Kicinski } 2343d9ae7f2bSJakub Kicinski 2344d9ae7f2bSJakub Kicinski static int or_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2345d9ae7f2bSJakub Kicinski { 2346d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_OR); 2347d9ae7f2bSJakub Kicinski } 2348d9ae7f2bSJakub Kicinski 2349d9ae7f2bSJakub Kicinski static int or_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2350d9ae7f2bSJakub Kicinski { 2351f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_OR); 2352d9ae7f2bSJakub Kicinski } 2353d9ae7f2bSJakub Kicinski 2354d9ae7f2bSJakub Kicinski static int add_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2355d9ae7f2bSJakub Kicinski { 2356d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_ADD); 2357d9ae7f2bSJakub Kicinski } 2358d9ae7f2bSJakub Kicinski 2359d9ae7f2bSJakub Kicinski static int add_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2360d9ae7f2bSJakub Kicinski { 2361f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_ADD); 2362d9ae7f2bSJakub Kicinski } 2363d9ae7f2bSJakub Kicinski 2364d9ae7f2bSJakub Kicinski static int sub_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2365d9ae7f2bSJakub Kicinski { 2366d9ae7f2bSJakub Kicinski return wrp_alu32_reg(nfp_prog, meta, ALU_OP_SUB); 2367d9ae7f2bSJakub Kicinski } 2368d9ae7f2bSJakub Kicinski 2369d9ae7f2bSJakub Kicinski static int sub_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2370d9ae7f2bSJakub Kicinski { 2371f036ebd9SJiong Wang return wrp_alu32_imm(nfp_prog, meta, ALU_OP_SUB); 2372d9ae7f2bSJakub Kicinski } 2373d9ae7f2bSJakub Kicinski 2374d3d23fdbSJiong Wang static int mul_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2375d3d23fdbSJiong Wang { 2376d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, true); 2377d3d23fdbSJiong Wang } 2378d3d23fdbSJiong Wang 2379d3d23fdbSJiong Wang static int mul_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2380d3d23fdbSJiong Wang { 2381d3d23fdbSJiong Wang return wrp_mul(nfp_prog, meta, false, false); 2382d3d23fdbSJiong Wang } 2383d3d23fdbSJiong Wang 23842a952b03SJiong Wang static int div_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23852a952b03SJiong Wang { 23862a952b03SJiong Wang return div_reg64(nfp_prog, meta); 23872a952b03SJiong Wang } 23882a952b03SJiong Wang 23892a952b03SJiong Wang static int div_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 23902a952b03SJiong Wang { 23912a952b03SJiong Wang return div_imm64(nfp_prog, meta); 23922a952b03SJiong Wang } 23932a952b03SJiong Wang 2394254ef4d7SJiong Wang static int neg_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2395254ef4d7SJiong Wang { 2396254ef4d7SJiong Wang u8 dst = meta->insn.dst_reg * 2; 2397254ef4d7SJiong Wang 2398254ef4d7SJiong Wang emit_alu(nfp_prog, reg_both(dst), reg_imm(0), ALU_OP_SUB, reg_b(dst)); 2399254ef4d7SJiong Wang wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2400254ef4d7SJiong Wang 2401254ef4d7SJiong Wang return 0; 2402254ef4d7SJiong Wang } 2403254ef4d7SJiong Wang 240484708c13SJiong Wang static int __ashr_imm(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 240584708c13SJiong Wang { 2406db0a4b3bSJiong Wang if (shift_amt) { 240784708c13SJiong Wang /* Set signedness bit (MSB of result). */ 2408db0a4b3bSJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(dst), ALU_OP_OR, 2409db0a4b3bSJiong Wang reg_imm(0)); 2410db0a4b3bSJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 2411db0a4b3bSJiong Wang reg_b(dst), SHF_SC_R_SHF, shift_amt); 2412db0a4b3bSJiong Wang } 241384708c13SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 241484708c13SJiong Wang 241584708c13SJiong Wang return 0; 241684708c13SJiong Wang } 241784708c13SJiong Wang 241884708c13SJiong Wang static int ashr_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 241984708c13SJiong Wang { 242084708c13SJiong Wang const struct bpf_insn *insn = &meta->insn; 242184708c13SJiong Wang u64 umin, umax; 242284708c13SJiong Wang u8 dst, src; 242384708c13SJiong Wang 242484708c13SJiong Wang dst = insn->dst_reg * 2; 242584708c13SJiong Wang umin = meta->umin_src; 242684708c13SJiong Wang umax = meta->umax_src; 242784708c13SJiong Wang if (umin == umax) 242884708c13SJiong Wang return __ashr_imm(nfp_prog, dst, umin); 242984708c13SJiong Wang 243084708c13SJiong Wang src = insn->src_reg * 2; 243184708c13SJiong Wang /* NOTE: the first insn will set both indirect shift amount (source A) 243284708c13SJiong Wang * and signedness bit (MSB of result). 243384708c13SJiong Wang */ 243484708c13SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_b(dst)); 243584708c13SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_ASHR, 243684708c13SJiong Wang reg_b(dst), SHF_SC_R_SHF); 243784708c13SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 243884708c13SJiong Wang 243984708c13SJiong Wang return 0; 244084708c13SJiong Wang } 244184708c13SJiong Wang 244284708c13SJiong Wang static int ashr_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 244384708c13SJiong Wang { 244484708c13SJiong Wang const struct bpf_insn *insn = &meta->insn; 244584708c13SJiong Wang u8 dst = insn->dst_reg * 2; 244684708c13SJiong Wang 244784708c13SJiong Wang return __ashr_imm(nfp_prog, dst, insn->imm); 244884708c13SJiong Wang } 244984708c13SJiong Wang 2450ac7a1717SJiong Wang static int __shr_imm(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2451ac7a1717SJiong Wang { 2452ac7a1717SJiong Wang if (shift_amt) 2453ac7a1717SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2454ac7a1717SJiong Wang reg_b(dst), SHF_SC_R_SHF, shift_amt); 2455ac7a1717SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2456ac7a1717SJiong Wang return 0; 2457ac7a1717SJiong Wang } 2458ac7a1717SJiong Wang 2459ac7a1717SJiong Wang static int shr_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2460ac7a1717SJiong Wang { 2461ac7a1717SJiong Wang const struct bpf_insn *insn = &meta->insn; 2462ac7a1717SJiong Wang u8 dst = insn->dst_reg * 2; 2463ac7a1717SJiong Wang 2464ac7a1717SJiong Wang return __shr_imm(nfp_prog, dst, insn->imm); 2465ac7a1717SJiong Wang } 2466ac7a1717SJiong Wang 2467ac7a1717SJiong Wang static int shr_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2468ac7a1717SJiong Wang { 2469ac7a1717SJiong Wang const struct bpf_insn *insn = &meta->insn; 2470ac7a1717SJiong Wang u64 umin, umax; 2471ac7a1717SJiong Wang u8 dst, src; 2472ac7a1717SJiong Wang 2473ac7a1717SJiong Wang dst = insn->dst_reg * 2; 2474ac7a1717SJiong Wang umin = meta->umin_src; 2475ac7a1717SJiong Wang umax = meta->umax_src; 2476ac7a1717SJiong Wang if (umin == umax) 2477ac7a1717SJiong Wang return __shr_imm(nfp_prog, dst, umin); 2478ac7a1717SJiong Wang 2479ac7a1717SJiong Wang src = insn->src_reg * 2; 2480ac7a1717SJiong Wang emit_alu(nfp_prog, reg_none(), reg_a(src), ALU_OP_OR, reg_imm(0)); 2481ac7a1717SJiong Wang emit_shf_indir(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2482ac7a1717SJiong Wang reg_b(dst), SHF_SC_R_SHF); 2483ac7a1717SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2484ac7a1717SJiong Wang return 0; 2485ac7a1717SJiong Wang } 2486ac7a1717SJiong Wang 2487ac7a1717SJiong Wang static int __shl_imm(struct nfp_prog *nfp_prog, u8 dst, u8 shift_amt) 2488ac7a1717SJiong Wang { 2489ac7a1717SJiong Wang if (shift_amt) 2490ac7a1717SJiong Wang emit_shf(nfp_prog, reg_both(dst), reg_none(), SHF_OP_NONE, 2491ac7a1717SJiong Wang reg_b(dst), SHF_SC_L_SHF, shift_amt); 2492ac7a1717SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2493ac7a1717SJiong Wang return 0; 2494ac7a1717SJiong Wang } 2495ac7a1717SJiong Wang 2496d9ae7f2bSJakub Kicinski static int shl_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2497d9ae7f2bSJakub Kicinski { 2498d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 2499ac7a1717SJiong Wang u8 dst = insn->dst_reg * 2; 2500d9ae7f2bSJakub Kicinski 2501ac7a1717SJiong Wang return __shl_imm(nfp_prog, dst, insn->imm); 2502ac7a1717SJiong Wang } 2503d9ae7f2bSJakub Kicinski 2504ac7a1717SJiong Wang static int shl_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2505ac7a1717SJiong Wang { 2506ac7a1717SJiong Wang const struct bpf_insn *insn = &meta->insn; 2507ac7a1717SJiong Wang u64 umin, umax; 2508ac7a1717SJiong Wang u8 dst, src; 2509ac7a1717SJiong Wang 2510ac7a1717SJiong Wang dst = insn->dst_reg * 2; 2511ac7a1717SJiong Wang umin = meta->umin_src; 2512ac7a1717SJiong Wang umax = meta->umax_src; 2513ac7a1717SJiong Wang if (umin == umax) 2514ac7a1717SJiong Wang return __shl_imm(nfp_prog, dst, umin); 2515ac7a1717SJiong Wang 2516ac7a1717SJiong Wang src = insn->src_reg * 2; 2517ac7a1717SJiong Wang shl_reg64_lt32_low(nfp_prog, dst, src); 2518ac7a1717SJiong Wang wrp_immed(nfp_prog, reg_both(dst + 1), 0); 2519d9ae7f2bSJakub Kicinski return 0; 2520d9ae7f2bSJakub Kicinski } 2521d9ae7f2bSJakub Kicinski 25223119d1fdSJakub Kicinski static int end_reg32(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 25233119d1fdSJakub Kicinski { 25243119d1fdSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 25253119d1fdSJakub Kicinski u8 gpr = insn->dst_reg * 2; 25263119d1fdSJakub Kicinski 25273119d1fdSJakub Kicinski switch (insn->imm) { 25283119d1fdSJakub Kicinski case 16: 25293119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0x9, reg_b(gpr), 25303119d1fdSJakub Kicinski SHF_SC_R_ROT, 8); 25313119d1fdSJakub Kicinski emit_ld_field(nfp_prog, reg_both(gpr), 0xe, reg_a(gpr), 25323119d1fdSJakub Kicinski SHF_SC_R_SHF, 16); 25333119d1fdSJakub Kicinski 25343119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 25353119d1fdSJakub Kicinski break; 25363119d1fdSJakub Kicinski case 32: 25373119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr); 25383119d1fdSJakub Kicinski wrp_immed(nfp_prog, reg_both(gpr + 1), 0); 25393119d1fdSJakub Kicinski break; 25403119d1fdSJakub Kicinski case 64: 25413119d1fdSJakub Kicinski wrp_mov(nfp_prog, imm_a(nfp_prog), reg_b(gpr + 1)); 25423119d1fdSJakub Kicinski 25433119d1fdSJakub Kicinski wrp_end32(nfp_prog, reg_a(gpr), gpr + 1); 25443119d1fdSJakub Kicinski wrp_end32(nfp_prog, imm_a(nfp_prog), gpr); 25453119d1fdSJakub Kicinski break; 25463119d1fdSJakub Kicinski } 25473119d1fdSJakub Kicinski 25483119d1fdSJakub Kicinski return 0; 25493119d1fdSJakub Kicinski } 25503119d1fdSJakub Kicinski 2551d9ae7f2bSJakub Kicinski static int imm_ld8_part2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2552d9ae7f2bSJakub Kicinski { 25539f16c8abSJakub Kicinski struct nfp_insn_meta *prev = nfp_meta_prev(meta); 25549f16c8abSJakub Kicinski u32 imm_lo, imm_hi; 25559f16c8abSJakub Kicinski u8 dst; 25569f16c8abSJakub Kicinski 25579f16c8abSJakub Kicinski dst = prev->insn.dst_reg * 2; 25589f16c8abSJakub Kicinski imm_lo = prev->insn.imm; 25599f16c8abSJakub Kicinski imm_hi = meta->insn.imm; 25609f16c8abSJakub Kicinski 25619f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst), imm_lo); 25629f16c8abSJakub Kicinski 25639f16c8abSJakub Kicinski /* mov is always 1 insn, load imm may be two, so try to use mov */ 25649f16c8abSJakub Kicinski if (imm_hi == imm_lo) 25659f16c8abSJakub Kicinski wrp_mov(nfp_prog, reg_both(dst + 1), reg_a(dst)); 25669f16c8abSJakub Kicinski else 25679f16c8abSJakub Kicinski wrp_immed(nfp_prog, reg_both(dst + 1), imm_hi); 2568d9ae7f2bSJakub Kicinski 2569d9ae7f2bSJakub Kicinski return 0; 2570d9ae7f2bSJakub Kicinski } 2571d9ae7f2bSJakub Kicinski 2572d9ae7f2bSJakub Kicinski static int imm_ld8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2573d9ae7f2bSJakub Kicinski { 2574d9ae7f2bSJakub Kicinski meta->double_cb = imm_ld8_part2; 2575d9ae7f2bSJakub Kicinski return 0; 2576d9ae7f2bSJakub Kicinski } 2577d9ae7f2bSJakub Kicinski 2578d9ae7f2bSJakub Kicinski static int data_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2579d9ae7f2bSJakub Kicinski { 2580d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 1); 2581d9ae7f2bSJakub Kicinski } 2582d9ae7f2bSJakub Kicinski 2583d9ae7f2bSJakub Kicinski static int data_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2584d9ae7f2bSJakub Kicinski { 2585d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 2); 2586d9ae7f2bSJakub Kicinski } 2587d9ae7f2bSJakub Kicinski 2588d9ae7f2bSJakub Kicinski static int data_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2589d9ae7f2bSJakub Kicinski { 2590d9ae7f2bSJakub Kicinski return construct_data_ld(nfp_prog, meta->insn.imm, 4); 2591d9ae7f2bSJakub Kicinski } 2592d9ae7f2bSJakub Kicinski 2593d9ae7f2bSJakub Kicinski static int data_ind_ld1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2594d9ae7f2bSJakub Kicinski { 2595d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 25960a793977SJakub Kicinski meta->insn.src_reg * 2, 1); 2597d9ae7f2bSJakub Kicinski } 2598d9ae7f2bSJakub Kicinski 2599d9ae7f2bSJakub Kicinski static int data_ind_ld2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2600d9ae7f2bSJakub Kicinski { 2601d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 26020a793977SJakub Kicinski meta->insn.src_reg * 2, 2); 2603d9ae7f2bSJakub Kicinski } 2604d9ae7f2bSJakub Kicinski 2605d9ae7f2bSJakub Kicinski static int data_ind_ld4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2606d9ae7f2bSJakub Kicinski { 2607d9ae7f2bSJakub Kicinski return construct_data_ind_ld(nfp_prog, meta->insn.imm, 26080a793977SJakub Kicinski meta->insn.src_reg * 2, 4); 2609d9ae7f2bSJakub Kicinski } 2610d9ae7f2bSJakub Kicinski 2611a82b23fbSJakub Kicinski static int 2612a82b23fbSJakub Kicinski mem_ldx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2613d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2614a82b23fbSJakub Kicinski { 2615d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2616b14157eeSJakub Kicinski meta->insn.dst_reg * 2, meta->insn.src_reg * 2, 2617b14157eeSJakub Kicinski true, wrp_lmem_load); 2618a82b23fbSJakub Kicinski } 2619a82b23fbSJakub Kicinski 2620943c57b9SJakub Kicinski static int mem_ldx_skb(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2621943c57b9SJakub Kicinski u8 size) 2622d9ae7f2bSJakub Kicinski { 2623bfddbc8aSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2624bfddbc8aSJakub Kicinski 2625943c57b9SJakub Kicinski switch (meta->insn.off) { 2626c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, len): 2627c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, len)) 2628943c57b9SJakub Kicinski return -EOPNOTSUPP; 2629bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, plen_reg(nfp_prog)); 2630bfddbc8aSJakub Kicinski break; 2631c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data): 2632c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data)) 2633bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2634bfddbc8aSJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2635bfddbc8aSJakub Kicinski break; 2636c6c580d7SJakub Kicinski case offsetof(struct __sk_buff, data_end): 2637c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct __sk_buff, data_end)) 2638bfddbc8aSJakub Kicinski return -EOPNOTSUPP; 2639bfddbc8aSJakub Kicinski emit_alu(nfp_prog, dst, 2640bfddbc8aSJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2641943c57b9SJakub Kicinski break; 2642943c57b9SJakub Kicinski default: 2643d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2644943c57b9SJakub Kicinski } 2645943c57b9SJakub Kicinski 2646943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2647d9ae7f2bSJakub Kicinski 2648d9ae7f2bSJakub Kicinski return 0; 2649d9ae7f2bSJakub Kicinski } 2650d9ae7f2bSJakub Kicinski 2651943c57b9SJakub Kicinski static int mem_ldx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2652943c57b9SJakub Kicinski u8 size) 2653d9ae7f2bSJakub Kicinski { 2654b3f868dfSJakub Kicinski swreg dst = reg_both(meta->insn.dst_reg * 2); 2655d9ae7f2bSJakub Kicinski 2656943c57b9SJakub Kicinski switch (meta->insn.off) { 2657c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data): 2658c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data)) 2659c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2660c000dfb5SJakub Kicinski wrp_mov(nfp_prog, dst, pptr_reg(nfp_prog)); 2661943c57b9SJakub Kicinski break; 2662c6c580d7SJakub Kicinski case offsetof(struct xdp_md, data_end): 2663c6c580d7SJakub Kicinski if (size != FIELD_SIZEOF(struct xdp_md, data_end)) 2664c6c580d7SJakub Kicinski return -EOPNOTSUPP; 2665943c57b9SJakub Kicinski emit_alu(nfp_prog, dst, 2666943c57b9SJakub Kicinski plen_reg(nfp_prog), ALU_OP_ADD, pptr_reg(nfp_prog)); 2667943c57b9SJakub Kicinski break; 2668943c57b9SJakub Kicinski default: 2669943c57b9SJakub Kicinski return -EOPNOTSUPP; 2670943c57b9SJakub Kicinski } 2671d9ae7f2bSJakub Kicinski 2672943c57b9SJakub Kicinski wrp_immed(nfp_prog, reg_both(meta->insn.dst_reg * 2 + 1), 0); 2673d9ae7f2bSJakub Kicinski 2674d9ae7f2bSJakub Kicinski return 0; 2675d9ae7f2bSJakub Kicinski } 2676d9ae7f2bSJakub Kicinski 26772ca71441SJakub Kicinski static int 26782ca71441SJakub Kicinski mem_ldx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 26792ca71441SJakub Kicinski unsigned int size) 26802ca71441SJakub Kicinski { 26812ca71441SJakub Kicinski swreg tmp_reg; 26822ca71441SJakub Kicinski 26832ca71441SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 26842ca71441SJakub Kicinski 26853dd43c33SJakub Kicinski return data_ld_host_order_addr32(nfp_prog, meta->insn.src_reg * 2, 26863dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 26873dd43c33SJakub Kicinski } 26883dd43c33SJakub Kicinski 26893dd43c33SJakub Kicinski static int 26903dd43c33SJakub Kicinski mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 26913dd43c33SJakub Kicinski unsigned int size) 26923dd43c33SJakub Kicinski { 26933dd43c33SJakub Kicinski swreg tmp_reg; 26943dd43c33SJakub Kicinski 26953dd43c33SJakub Kicinski tmp_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 26963dd43c33SJakub Kicinski 26973dd43c33SJakub Kicinski return data_ld_host_order_addr40(nfp_prog, meta->insn.src_reg * 2, 26983dd43c33SJakub Kicinski tmp_reg, meta->insn.dst_reg * 2, size); 26992ca71441SJakub Kicinski } 27002ca71441SJakub Kicinski 2701be759237SJiong Wang static void 2702be759237SJiong Wang mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, 2703be759237SJiong Wang struct nfp_insn_meta *meta) 2704be759237SJiong Wang { 2705be759237SJiong Wang s16 range_start = meta->pkt_cache.range_start; 2706be759237SJiong Wang s16 range_end = meta->pkt_cache.range_end; 2707be759237SJiong Wang swreg src_base, off; 2708be759237SJiong Wang u8 xfer_num, len; 2709be759237SJiong Wang bool indir; 2710be759237SJiong Wang 2711be759237SJiong Wang off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); 2712be759237SJiong Wang src_base = reg_a(meta->insn.src_reg * 2); 2713be759237SJiong Wang len = range_end - range_start; 2714be759237SJiong Wang xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; 2715be759237SJiong Wang 2716be759237SJiong Wang indir = len > 8 * REG_WIDTH; 2717be759237SJiong Wang /* Setup PREV_ALU for indirect mode. */ 2718be759237SJiong Wang if (indir) 2719be759237SJiong Wang wrp_immed(nfp_prog, reg_none(), 2720be759237SJiong Wang CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); 2721be759237SJiong Wang 2722be759237SJiong Wang /* Cache memory into transfer-in registers. */ 2723be759237SJiong Wang emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, 2724b556ddd9SJakub Kicinski off, xfer_num - 1, CMD_CTX_SWAP, indir); 2725be759237SJiong Wang } 2726be759237SJiong Wang 2727be759237SJiong Wang static int 272891ff69e8SJiong Wang mem_ldx_data_from_pktcache_unaligned(struct nfp_prog *nfp_prog, 272991ff69e8SJiong Wang struct nfp_insn_meta *meta, 273091ff69e8SJiong Wang unsigned int size) 273191ff69e8SJiong Wang { 273291ff69e8SJiong Wang s16 range_start = meta->pkt_cache.range_start; 273391ff69e8SJiong Wang s16 insn_off = meta->insn.off - range_start; 273491ff69e8SJiong Wang swreg dst_lo, dst_hi, src_lo, src_mid; 273591ff69e8SJiong Wang u8 dst_gpr = meta->insn.dst_reg * 2; 273691ff69e8SJiong Wang u8 len_lo = size, len_mid = 0; 273791ff69e8SJiong Wang u8 idx = insn_off / REG_WIDTH; 273891ff69e8SJiong Wang u8 off = insn_off % REG_WIDTH; 273991ff69e8SJiong Wang 274091ff69e8SJiong Wang dst_hi = reg_both(dst_gpr + 1); 274191ff69e8SJiong Wang dst_lo = reg_both(dst_gpr); 274291ff69e8SJiong Wang src_lo = reg_xfer(idx); 274391ff69e8SJiong Wang 274491ff69e8SJiong Wang /* The read length could involve as many as three registers. */ 274591ff69e8SJiong Wang if (size > REG_WIDTH - off) { 274691ff69e8SJiong Wang /* Calculate the part in the second register. */ 274791ff69e8SJiong Wang len_lo = REG_WIDTH - off; 274891ff69e8SJiong Wang len_mid = size - len_lo; 274991ff69e8SJiong Wang 275091ff69e8SJiong Wang /* Calculate the part in the third register. */ 275191ff69e8SJiong Wang if (size > 2 * REG_WIDTH - off) 275291ff69e8SJiong Wang len_mid = REG_WIDTH; 275391ff69e8SJiong Wang } 275491ff69e8SJiong Wang 275591ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, len_lo, off); 275691ff69e8SJiong Wang 275791ff69e8SJiong Wang if (!len_mid) { 275891ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 275991ff69e8SJiong Wang return 0; 276091ff69e8SJiong Wang } 276191ff69e8SJiong Wang 276291ff69e8SJiong Wang src_mid = reg_xfer(idx + 1); 276391ff69e8SJiong Wang 276491ff69e8SJiong Wang if (size <= REG_WIDTH) { 276591ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, len_mid, len_lo); 276691ff69e8SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 276791ff69e8SJiong Wang } else { 276891ff69e8SJiong Wang swreg src_hi = reg_xfer(idx + 2); 276991ff69e8SJiong Wang 277091ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_lo, src_mid, 277191ff69e8SJiong Wang REG_WIDTH - len_lo, len_lo); 277291ff69e8SJiong Wang wrp_reg_subpart(nfp_prog, dst_hi, src_mid, len_lo, 277391ff69e8SJiong Wang REG_WIDTH - len_lo); 277491ff69e8SJiong Wang wrp_reg_or_subpart(nfp_prog, dst_hi, src_hi, REG_WIDTH - len_lo, 277591ff69e8SJiong Wang len_lo); 277691ff69e8SJiong Wang } 277791ff69e8SJiong Wang 277891ff69e8SJiong Wang return 0; 277991ff69e8SJiong Wang } 278091ff69e8SJiong Wang 278191ff69e8SJiong Wang static int 2782be759237SJiong Wang mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, 2783be759237SJiong Wang struct nfp_insn_meta *meta, 2784be759237SJiong Wang unsigned int size) 2785be759237SJiong Wang { 2786be759237SJiong Wang swreg dst_lo, dst_hi, src_lo; 2787be759237SJiong Wang u8 dst_gpr, idx; 2788be759237SJiong Wang 2789be759237SJiong Wang idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; 2790be759237SJiong Wang dst_gpr = meta->insn.dst_reg * 2; 2791be759237SJiong Wang dst_hi = reg_both(dst_gpr + 1); 2792be759237SJiong Wang dst_lo = reg_both(dst_gpr); 2793be759237SJiong Wang src_lo = reg_xfer(idx); 2794be759237SJiong Wang 2795be759237SJiong Wang if (size < REG_WIDTH) { 2796be759237SJiong Wang wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); 2797be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2798be759237SJiong Wang } else if (size == REG_WIDTH) { 2799be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2800be759237SJiong Wang wrp_immed(nfp_prog, dst_hi, 0); 2801be759237SJiong Wang } else { 2802be759237SJiong Wang swreg src_hi = reg_xfer(idx + 1); 2803be759237SJiong Wang 2804be759237SJiong Wang wrp_mov(nfp_prog, dst_lo, src_lo); 2805be759237SJiong Wang wrp_mov(nfp_prog, dst_hi, src_hi); 2806be759237SJiong Wang } 2807be759237SJiong Wang 2808be759237SJiong Wang return 0; 2809be759237SJiong Wang } 2810be759237SJiong Wang 2811be759237SJiong Wang static int 2812be759237SJiong Wang mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, 2813be759237SJiong Wang struct nfp_insn_meta *meta, unsigned int size) 2814be759237SJiong Wang { 2815be759237SJiong Wang u8 off = meta->insn.off - meta->pkt_cache.range_start; 2816be759237SJiong Wang 281791ff69e8SJiong Wang if (IS_ALIGNED(off, REG_WIDTH)) 2818be759237SJiong Wang return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); 281991ff69e8SJiong Wang 282091ff69e8SJiong Wang return mem_ldx_data_from_pktcache_unaligned(nfp_prog, meta, size); 2821be759237SJiong Wang } 2822be759237SJiong Wang 28232ca71441SJakub Kicinski static int 28242ca71441SJakub Kicinski mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 28252ca71441SJakub Kicinski unsigned int size) 28262ca71441SJakub Kicinski { 28279879a381SJiong Wang if (meta->ldst_gather_len) 28289879a381SJiong Wang return nfp_cpp_memcpy(nfp_prog, meta); 28299879a381SJiong Wang 28302ca71441SJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) { 2831012bb8a8SJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 28322ca71441SJakub Kicinski return mem_ldx_xdp(nfp_prog, meta, size); 28332ca71441SJakub Kicinski else 28342ca71441SJakub Kicinski return mem_ldx_skb(nfp_prog, meta, size); 28352ca71441SJakub Kicinski } 28362ca71441SJakub Kicinski 2837be759237SJiong Wang if (meta->ptr.type == PTR_TO_PACKET) { 2838be759237SJiong Wang if (meta->pkt_cache.range_end) { 2839be759237SJiong Wang if (meta->pkt_cache.do_init) 2840be759237SJiong Wang mem_ldx_data_init_pktcache(nfp_prog, meta); 2841be759237SJiong Wang 2842be759237SJiong Wang return mem_ldx_data_from_pktcache(nfp_prog, meta, size); 2843be759237SJiong Wang } else { 28442ca71441SJakub Kicinski return mem_ldx_data(nfp_prog, meta, size); 2845be759237SJiong Wang } 2846be759237SJiong Wang } 28472ca71441SJakub Kicinski 2848a82b23fbSJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2849d3488480SJakub Kicinski return mem_ldx_stack(nfp_prog, meta, size, 2850d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2851a82b23fbSJakub Kicinski 28523dd43c33SJakub Kicinski if (meta->ptr.type == PTR_TO_MAP_VALUE) 28533dd43c33SJakub Kicinski return mem_ldx_emem(nfp_prog, meta, size); 28543dd43c33SJakub Kicinski 28552ca71441SJakub Kicinski return -EOPNOTSUPP; 28562ca71441SJakub Kicinski } 28572ca71441SJakub Kicinski 28582ca71441SJakub Kicinski static int mem_ldx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 28592ca71441SJakub Kicinski { 28602ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 1); 28612ca71441SJakub Kicinski } 28622ca71441SJakub Kicinski 28632ca71441SJakub Kicinski static int mem_ldx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 28642ca71441SJakub Kicinski { 28652ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 2); 28662ca71441SJakub Kicinski } 28672ca71441SJakub Kicinski 2868d9ae7f2bSJakub Kicinski static int mem_ldx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2869d9ae7f2bSJakub Kicinski { 28702ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 4); 28712ca71441SJakub Kicinski } 28722ca71441SJakub Kicinski 28732ca71441SJakub Kicinski static int mem_ldx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 28742ca71441SJakub Kicinski { 28752ca71441SJakub Kicinski return mem_ldx(nfp_prog, meta, 8); 2876d9ae7f2bSJakub Kicinski } 2877d9ae7f2bSJakub Kicinski 2878e663fe38SJakub Kicinski static int 2879e663fe38SJakub Kicinski mem_st_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2880e663fe38SJakub Kicinski unsigned int size) 2881d9ae7f2bSJakub Kicinski { 2882e663fe38SJakub Kicinski u64 imm = meta->insn.imm; /* sign extend */ 2883e663fe38SJakub Kicinski swreg off_reg; 2884e663fe38SJakub Kicinski 2885e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2886e663fe38SJakub Kicinski 2887e663fe38SJakub Kicinski return data_st_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2888e663fe38SJakub Kicinski imm, size); 2889e663fe38SJakub Kicinski } 2890e663fe38SJakub Kicinski 2891e663fe38SJakub Kicinski static int mem_st(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2892e663fe38SJakub Kicinski unsigned int size) 2893e663fe38SJakub Kicinski { 2894e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2895e663fe38SJakub Kicinski return mem_st_data(nfp_prog, meta, size); 2896e663fe38SJakub Kicinski 2897d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2898d9ae7f2bSJakub Kicinski } 2899d9ae7f2bSJakub Kicinski 2900e663fe38SJakub Kicinski static int mem_st1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2901d9ae7f2bSJakub Kicinski { 2902e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 1); 2903e663fe38SJakub Kicinski } 2904e663fe38SJakub Kicinski 2905e663fe38SJakub Kicinski static int mem_st2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2906e663fe38SJakub Kicinski { 2907e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 2); 2908e663fe38SJakub Kicinski } 2909e663fe38SJakub Kicinski 2910e663fe38SJakub Kicinski static int mem_st4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2911e663fe38SJakub Kicinski { 2912e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 4); 2913e663fe38SJakub Kicinski } 2914e663fe38SJakub Kicinski 2915e663fe38SJakub Kicinski static int mem_st8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2916e663fe38SJakub Kicinski { 2917e663fe38SJakub Kicinski return mem_st(nfp_prog, meta, 8); 2918e663fe38SJakub Kicinski } 2919e663fe38SJakub Kicinski 2920e663fe38SJakub Kicinski static int 2921e663fe38SJakub Kicinski mem_stx_data(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2922e663fe38SJakub Kicinski unsigned int size) 2923e663fe38SJakub Kicinski { 2924e663fe38SJakub Kicinski swreg off_reg; 2925e663fe38SJakub Kicinski 2926e663fe38SJakub Kicinski off_reg = re_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2927e663fe38SJakub Kicinski 2928e663fe38SJakub Kicinski return data_stx_host_order(nfp_prog, meta->insn.dst_reg * 2, off_reg, 2929e663fe38SJakub Kicinski meta->insn.src_reg * 2, size); 2930e663fe38SJakub Kicinski } 2931e663fe38SJakub Kicinski 2932e663fe38SJakub Kicinski static int 2933ee9133a8SJakub Kicinski mem_stx_stack(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2934d3488480SJakub Kicinski unsigned int size, unsigned int ptr_off) 2935ee9133a8SJakub Kicinski { 2936d3488480SJakub Kicinski return mem_op_stack(nfp_prog, meta, size, ptr_off, 2937b14157eeSJakub Kicinski meta->insn.src_reg * 2, meta->insn.dst_reg * 2, 2938b14157eeSJakub Kicinski false, wrp_lmem_store); 2939ee9133a8SJakub Kicinski } 2940ee9133a8SJakub Kicinski 2941d985888fSJakub Kicinski static int mem_stx_xdp(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2942d985888fSJakub Kicinski { 2943d985888fSJakub Kicinski switch (meta->insn.off) { 2944d985888fSJakub Kicinski case offsetof(struct xdp_md, rx_queue_index): 2945d985888fSJakub Kicinski return nfp_queue_select(nfp_prog, meta); 2946d985888fSJakub Kicinski } 2947d985888fSJakub Kicinski 2948d985888fSJakub Kicinski WARN_ON_ONCE(1); /* verifier should have rejected bad accesses */ 2949d985888fSJakub Kicinski return -EOPNOTSUPP; 2950d985888fSJakub Kicinski } 2951d985888fSJakub Kicinski 2952ee9133a8SJakub Kicinski static int 2953e663fe38SJakub Kicinski mem_stx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 2954e663fe38SJakub Kicinski unsigned int size) 2955e663fe38SJakub Kicinski { 2956e663fe38SJakub Kicinski if (meta->ptr.type == PTR_TO_PACKET) 2957e663fe38SJakub Kicinski return mem_stx_data(nfp_prog, meta, size); 2958e663fe38SJakub Kicinski 2959ee9133a8SJakub Kicinski if (meta->ptr.type == PTR_TO_STACK) 2960d3488480SJakub Kicinski return mem_stx_stack(nfp_prog, meta, size, 2961d3488480SJakub Kicinski meta->ptr.off + meta->ptr.var_off.value); 2962ee9133a8SJakub Kicinski 2963d9ae7f2bSJakub Kicinski return -EOPNOTSUPP; 2964d9ae7f2bSJakub Kicinski } 2965d9ae7f2bSJakub Kicinski 2966e663fe38SJakub Kicinski static int mem_stx1(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2967e663fe38SJakub Kicinski { 2968e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 1); 2969e663fe38SJakub Kicinski } 2970e663fe38SJakub Kicinski 2971e663fe38SJakub Kicinski static int mem_stx2(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2972e663fe38SJakub Kicinski { 2973e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 2); 2974e663fe38SJakub Kicinski } 2975e663fe38SJakub Kicinski 2976d9ae7f2bSJakub Kicinski static int mem_stx4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2977d9ae7f2bSJakub Kicinski { 2978d985888fSJakub Kicinski if (meta->ptr.type == PTR_TO_CTX) 2979d985888fSJakub Kicinski if (nfp_prog->type == BPF_PROG_TYPE_XDP) 2980d985888fSJakub Kicinski return mem_stx_xdp(nfp_prog, meta); 2981e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 4); 2982e663fe38SJakub Kicinski } 29832ca71441SJakub Kicinski 2984e663fe38SJakub Kicinski static int mem_stx8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 2985e663fe38SJakub Kicinski { 2986e663fe38SJakub Kicinski return mem_stx(nfp_prog, meta, 8); 2987d9ae7f2bSJakub Kicinski } 2988d9ae7f2bSJakub Kicinski 2989dcb0c27fSJakub Kicinski static int 2990dcb0c27fSJakub Kicinski mem_xadd(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, bool is64) 2991dcb0c27fSJakub Kicinski { 2992dcb0c27fSJakub Kicinski u8 dst_gpr = meta->insn.dst_reg * 2; 2993dcb0c27fSJakub Kicinski u8 src_gpr = meta->insn.src_reg * 2; 299441aed09cSJakub Kicinski unsigned int full_add, out; 299541aed09cSJakub Kicinski swreg addra, addrb, off; 2996dcb0c27fSJakub Kicinski 2997dcb0c27fSJakub Kicinski off = ur_load_imm_any(nfp_prog, meta->insn.off, imm_b(nfp_prog)); 2998dcb0c27fSJakub Kicinski 299941aed09cSJakub Kicinski /* We can fit 16 bits into command immediate, if we know the immediate 300041aed09cSJakub Kicinski * is guaranteed to either always or never fit into 16 bit we only 300141aed09cSJakub Kicinski * generate code to handle that particular case, otherwise generate 300241aed09cSJakub Kicinski * code for both. 300341aed09cSJakub Kicinski */ 300441aed09cSJakub Kicinski out = nfp_prog_current_offset(nfp_prog); 300541aed09cSJakub Kicinski full_add = nfp_prog_current_offset(nfp_prog); 300641aed09cSJakub Kicinski 300741aed09cSJakub Kicinski if (meta->insn.off) { 300841aed09cSJakub Kicinski out += 2; 300941aed09cSJakub Kicinski full_add += 2; 301041aed09cSJakub Kicinski } 301141aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 301241aed09cSJakub Kicinski out += 3; 301341aed09cSJakub Kicinski full_add += 3; 301441aed09cSJakub Kicinski } 301541aed09cSJakub Kicinski if (meta->xadd_over_16bit) 301641aed09cSJakub Kicinski out += 2 + is64; 301741aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 301841aed09cSJakub Kicinski out += 5; 301941aed09cSJakub Kicinski full_add += 5; 302041aed09cSJakub Kicinski } 302141aed09cSJakub Kicinski 302241aed09cSJakub Kicinski /* Generate the branch for choosing add_imm vs add */ 302341aed09cSJakub Kicinski if (meta->xadd_maybe_16bit && meta->xadd_over_16bit) { 302441aed09cSJakub Kicinski swreg max_imm = imm_a(nfp_prog); 302541aed09cSJakub Kicinski 302641aed09cSJakub Kicinski wrp_immed(nfp_prog, max_imm, 0xffff); 302741aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 302841aed09cSJakub Kicinski max_imm, ALU_OP_SUB, reg_b(src_gpr)); 302941aed09cSJakub Kicinski emit_alu(nfp_prog, reg_none(), 303041aed09cSJakub Kicinski reg_imm(0), ALU_OP_SUB_C, reg_b(src_gpr + 1)); 303141aed09cSJakub Kicinski emit_br(nfp_prog, BR_BLO, full_add, meta->insn.off ? 2 : 0); 303241aed09cSJakub Kicinski /* defer for add */ 303341aed09cSJakub Kicinski } 303441aed09cSJakub Kicinski 3035dcb0c27fSJakub Kicinski /* If insn has an offset add to the address */ 3036dcb0c27fSJakub Kicinski if (!meta->insn.off) { 3037dcb0c27fSJakub Kicinski addra = reg_a(dst_gpr); 3038dcb0c27fSJakub Kicinski addrb = reg_b(dst_gpr + 1); 3039dcb0c27fSJakub Kicinski } else { 3040dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_a(nfp_prog), 3041dcb0c27fSJakub Kicinski reg_a(dst_gpr), ALU_OP_ADD, off); 3042dcb0c27fSJakub Kicinski emit_alu(nfp_prog, imma_b(nfp_prog), 3043dcb0c27fSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_ADD_C, reg_imm(0)); 3044dcb0c27fSJakub Kicinski addra = imma_a(nfp_prog); 3045dcb0c27fSJakub Kicinski addrb = imma_b(nfp_prog); 3046dcb0c27fSJakub Kicinski } 3047dcb0c27fSJakub Kicinski 304841aed09cSJakub Kicinski /* Generate the add_imm if 16 bits are possible */ 304941aed09cSJakub Kicinski if (meta->xadd_maybe_16bit) { 305041aed09cSJakub Kicinski swreg prev_alu = imm_a(nfp_prog); 305141aed09cSJakub Kicinski 3052dcb0c27fSJakub Kicinski wrp_immed(nfp_prog, prev_alu, 3053dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OVE_DATA, 2) | 3054dcb0c27fSJakub Kicinski CMD_OVE_LEN | 3055dcb0c27fSJakub Kicinski FIELD_PREP(CMD_OV_LEN, 0x8 | is64 << 2)); 3056dcb0c27fSJakub Kicinski wrp_reg_or_subpart(nfp_prog, prev_alu, reg_b(src_gpr), 2, 2); 3057dcb0c27fSJakub Kicinski emit_cmd_indir(nfp_prog, CMD_TGT_ADD_IMM, CMD_MODE_40b_BA, 0, 3058b556ddd9SJakub Kicinski addra, addrb, 0, CMD_CTX_NO_SWAP); 3059dcb0c27fSJakub Kicinski 306041aed09cSJakub Kicinski if (meta->xadd_over_16bit) 306141aed09cSJakub Kicinski emit_br(nfp_prog, BR_UNC, out, 0); 306241aed09cSJakub Kicinski } 306341aed09cSJakub Kicinski 306441aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, full_add)) 306541aed09cSJakub Kicinski return -EINVAL; 306641aed09cSJakub Kicinski 306741aed09cSJakub Kicinski /* Generate the add if 16 bits are not guaranteed */ 306841aed09cSJakub Kicinski if (meta->xadd_over_16bit) { 306941aed09cSJakub Kicinski emit_cmd(nfp_prog, CMD_TGT_ADD, CMD_MODE_40b_BA, 0, 307041aed09cSJakub Kicinski addra, addrb, is64 << 2, 307141aed09cSJakub Kicinski is64 ? CMD_CTX_SWAP_DEFER2 : CMD_CTX_SWAP_DEFER1); 307241aed09cSJakub Kicinski 307341aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(0), reg_a(src_gpr)); 307441aed09cSJakub Kicinski if (is64) 307541aed09cSJakub Kicinski wrp_mov(nfp_prog, reg_xfer(1), reg_a(src_gpr + 1)); 307641aed09cSJakub Kicinski } 307741aed09cSJakub Kicinski 307841aed09cSJakub Kicinski if (!nfp_prog_confirm_current_offset(nfp_prog, out)) 307941aed09cSJakub Kicinski return -EINVAL; 308041aed09cSJakub Kicinski 3081dcb0c27fSJakub Kicinski return 0; 3082dcb0c27fSJakub Kicinski } 3083dcb0c27fSJakub Kicinski 3084dcb0c27fSJakub Kicinski static int mem_xadd4(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3085dcb0c27fSJakub Kicinski { 3086dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, false); 3087dcb0c27fSJakub Kicinski } 3088dcb0c27fSJakub Kicinski 3089dcb0c27fSJakub Kicinski static int mem_xadd8(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3090dcb0c27fSJakub Kicinski { 3091dcb0c27fSJakub Kicinski return mem_xadd(nfp_prog, meta, true); 3092dcb0c27fSJakub Kicinski } 3093dcb0c27fSJakub Kicinski 3094d9ae7f2bSJakub Kicinski static int jump(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3095d9ae7f2bSJakub Kicinski { 3096d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.off, 0); 3097d9ae7f2bSJakub Kicinski 3098d9ae7f2bSJakub Kicinski return 0; 3099d9ae7f2bSJakub Kicinski } 3100d9ae7f2bSJakub Kicinski 3101d9ae7f2bSJakub Kicinski static int jeq_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3102d9ae7f2bSJakub Kicinski { 3103d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3104d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 3105b3f868dfSJakub Kicinski swreg or1, or2, tmp_reg; 3106b3f868dfSJakub Kicinski 3107b3f868dfSJakub Kicinski or1 = reg_a(insn->dst_reg * 2); 3108b3f868dfSJakub Kicinski or2 = reg_b(insn->dst_reg * 2 + 1); 3109d9ae7f2bSJakub Kicinski 3110d9ae7f2bSJakub Kicinski if (imm & ~0U) { 3111d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3112d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), 3113d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 3114d9ae7f2bSJakub Kicinski or1 = imm_a(nfp_prog); 3115d9ae7f2bSJakub Kicinski } 3116d9ae7f2bSJakub Kicinski 3117d9ae7f2bSJakub Kicinski if (imm >> 32) { 3118d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3119d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 3120d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 3121d9ae7f2bSJakub Kicinski or2 = imm_b(nfp_prog); 3122d9ae7f2bSJakub Kicinski } 3123d9ae7f2bSJakub Kicinski 3124d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), or1, ALU_OP_OR, or2); 3125d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 3126d9ae7f2bSJakub Kicinski 3127d9ae7f2bSJakub Kicinski return 0; 3128d9ae7f2bSJakub Kicinski } 3129d9ae7f2bSJakub Kicinski 313046144839SJiong Wang static int jeq32_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 313146144839SJiong Wang { 313246144839SJiong Wang const struct bpf_insn *insn = &meta->insn; 313346144839SJiong Wang swreg tmp_reg; 313446144839SJiong Wang 313546144839SJiong Wang tmp_reg = ur_load_imm_any(nfp_prog, insn->imm, imm_b(nfp_prog)); 313646144839SJiong Wang emit_alu(nfp_prog, reg_none(), 313746144839SJiong Wang reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 313846144839SJiong Wang emit_br(nfp_prog, BR_BEQ, insn->off, 0); 313946144839SJiong Wang 314046144839SJiong Wang return 0; 314146144839SJiong Wang } 314246144839SJiong Wang 3143d9ae7f2bSJakub Kicinski static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3144d9ae7f2bSJakub Kicinski { 3145d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3146d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 31474987eaccSJakub Kicinski u8 dst_gpr = insn->dst_reg * 2; 3148b3f868dfSJakub Kicinski swreg tmp_reg; 3149d9ae7f2bSJakub Kicinski 3150d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 31514987eaccSJakub Kicinski emit_alu(nfp_prog, imm_b(nfp_prog), 31524987eaccSJakub Kicinski reg_a(dst_gpr), ALU_OP_AND, tmp_reg); 31534987eaccSJakub Kicinski /* Upper word of the mask can only be 0 or ~0 from sign extension, 31544987eaccSJakub Kicinski * so either ignore it or OR the whole thing in. 31554987eaccSJakub Kicinski */ 315646144839SJiong Wang if (is_mbpf_jmp64(meta) && imm >> 32) { 3157d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 31584987eaccSJakub Kicinski reg_a(dst_gpr + 1), ALU_OP_OR, imm_b(nfp_prog)); 315946144839SJiong Wang } 3160d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3161d9ae7f2bSJakub Kicinski 3162d9ae7f2bSJakub Kicinski return 0; 3163d9ae7f2bSJakub Kicinski } 3164d9ae7f2bSJakub Kicinski 3165d9ae7f2bSJakub Kicinski static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3166d9ae7f2bSJakub Kicinski { 3167d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3168d9ae7f2bSJakub Kicinski u64 imm = insn->imm; /* sign extend */ 316946144839SJiong Wang bool is_jmp32 = is_mbpf_jmp32(meta); 3170b3f868dfSJakub Kicinski swreg tmp_reg; 3171d9ae7f2bSJakub Kicinski 3172d9ae7f2bSJakub Kicinski if (!imm) { 317346144839SJiong Wang if (is_jmp32) 317446144839SJiong Wang emit_alu(nfp_prog, reg_none(), reg_none(), ALU_OP_NONE, 317546144839SJiong Wang reg_b(insn->dst_reg * 2)); 317646144839SJiong Wang else 3177d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), 3178d9ae7f2bSJakub Kicinski ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); 3179d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 318082837370SJakub Kicinski return 0; 3181d9ae7f2bSJakub Kicinski } 3182d9ae7f2bSJakub Kicinski 3183d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); 3184d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3185d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2), ALU_OP_XOR, tmp_reg); 3186d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3187d9ae7f2bSJakub Kicinski 318846144839SJiong Wang if (is_jmp32) 318946144839SJiong Wang return 0; 319046144839SJiong Wang 3191d9ae7f2bSJakub Kicinski tmp_reg = ur_load_imm_any(nfp_prog, imm >> 32, imm_b(nfp_prog)); 3192d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), 3193d9ae7f2bSJakub Kicinski reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, tmp_reg); 3194d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BNE, insn->off, 0); 3195d9ae7f2bSJakub Kicinski 3196d9ae7f2bSJakub Kicinski return 0; 3197d9ae7f2bSJakub Kicinski } 3198d9ae7f2bSJakub Kicinski 3199d9ae7f2bSJakub Kicinski static int jeq_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3200d9ae7f2bSJakub Kicinski { 3201d9ae7f2bSJakub Kicinski const struct bpf_insn *insn = &meta->insn; 3202d9ae7f2bSJakub Kicinski 3203d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, imm_a(nfp_prog), reg_a(insn->dst_reg * 2), 3204d9ae7f2bSJakub Kicinski ALU_OP_XOR, reg_b(insn->src_reg * 2)); 320546144839SJiong Wang if (is_mbpf_jmp64(meta)) { 320646144839SJiong Wang emit_alu(nfp_prog, imm_b(nfp_prog), 320746144839SJiong Wang reg_a(insn->dst_reg * 2 + 1), ALU_OP_XOR, 320846144839SJiong Wang reg_b(insn->src_reg * 2 + 1)); 320946144839SJiong Wang emit_alu(nfp_prog, reg_none(), imm_a(nfp_prog), ALU_OP_OR, 321046144839SJiong Wang imm_b(nfp_prog)); 321146144839SJiong Wang } 3212d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BEQ, insn->off, 0); 3213d9ae7f2bSJakub Kicinski 3214d9ae7f2bSJakub Kicinski return 0; 3215d9ae7f2bSJakub Kicinski } 3216d9ae7f2bSJakub Kicinski 3217d9ae7f2bSJakub Kicinski static int jset_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3218d9ae7f2bSJakub Kicinski { 3219d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_AND, BR_BNE); 3220d9ae7f2bSJakub Kicinski } 3221d9ae7f2bSJakub Kicinski 3222d9ae7f2bSJakub Kicinski static int jne_reg(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3223d9ae7f2bSJakub Kicinski { 3224d9ae7f2bSJakub Kicinski return wrp_test_reg(nfp_prog, meta, ALU_OP_XOR, BR_BNE); 3225d9ae7f2bSJakub Kicinski } 3226d9ae7f2bSJakub Kicinski 3227389f263bSQuentin Monnet static int 3228389f263bSQuentin Monnet bpf_to_bpf_call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3229389f263bSQuentin Monnet { 3230bdf4c66fSQuentin Monnet u32 ret_tgt, stack_depth, offset_br; 3231389f263bSQuentin Monnet swreg tmp_reg; 3232389f263bSQuentin Monnet 3233389f263bSQuentin Monnet stack_depth = round_up(nfp_prog->stack_frame_depth, STACK_FRAME_ALIGN); 3234389f263bSQuentin Monnet /* Space for saving the return address is accounted for by the callee, 3235389f263bSQuentin Monnet * so stack_depth can be zero for the main function. 3236389f263bSQuentin Monnet */ 3237389f263bSQuentin Monnet if (stack_depth) { 3238389f263bSQuentin Monnet tmp_reg = ur_load_imm_any(nfp_prog, stack_depth, 3239389f263bSQuentin Monnet stack_imm(nfp_prog)); 3240389f263bSQuentin Monnet emit_alu(nfp_prog, stack_reg(nfp_prog), 3241389f263bSQuentin Monnet stack_reg(nfp_prog), ALU_OP_ADD, tmp_reg); 3242389f263bSQuentin Monnet emit_csr_wr(nfp_prog, stack_reg(nfp_prog), 3243389f263bSQuentin Monnet NFP_CSR_ACT_LM_ADDR0); 3244389f263bSQuentin Monnet } 3245389f263bSQuentin Monnet 324644549623SQuentin Monnet /* Two cases for jumping to the callee: 324744549623SQuentin Monnet * 324844549623SQuentin Monnet * - If callee uses and needs to save R6~R9 then: 3249389f263bSQuentin Monnet * 1. Put the start offset of the callee into imm_b(). This will 3250389f263bSQuentin Monnet * require a fixup step, as we do not necessarily know this 3251389f263bSQuentin Monnet * address yet. 3252389f263bSQuentin Monnet * 2. Put the return address from the callee to the caller into 3253389f263bSQuentin Monnet * register ret_reg(). 3254389f263bSQuentin Monnet * 3. (After defer slots are consumed) Jump to the subroutine that 3255389f263bSQuentin Monnet * pushes the registers to the stack. 3256389f263bSQuentin Monnet * The subroutine acts as a trampoline, and returns to the address in 3257389f263bSQuentin Monnet * imm_b(), i.e. jumps to the callee. 3258389f263bSQuentin Monnet * 325944549623SQuentin Monnet * - If callee does not need to save R6~R9 then just load return 326044549623SQuentin Monnet * address to the caller in ret_reg(), and jump to the callee 326144549623SQuentin Monnet * directly. 326244549623SQuentin Monnet * 3263389f263bSQuentin Monnet * Using ret_reg() to pass the return address to the callee is set here 3264389f263bSQuentin Monnet * as a convention. The callee can then push this address onto its 3265389f263bSQuentin Monnet * stack frame in its prologue. The advantages of passing the return 3266389f263bSQuentin Monnet * address through ret_reg(), instead of pushing it to the stack right 3267389f263bSQuentin Monnet * here, are the following: 3268389f263bSQuentin Monnet * - It looks cleaner. 3269389f263bSQuentin Monnet * - If the called function is called multiple time, we get a lower 3270389f263bSQuentin Monnet * program size. 3271389f263bSQuentin Monnet * - We save two no-op instructions that should be added just before 3272389f263bSQuentin Monnet * the emit_br() when stack depth is not null otherwise. 3273389f263bSQuentin Monnet * - If we ever find a register to hold the return address during whole 3274389f263bSQuentin Monnet * execution of the callee, we will not have to push the return 3275389f263bSQuentin Monnet * address to the stack for leaf functions. 3276389f263bSQuentin Monnet */ 327744549623SQuentin Monnet if (!meta->jmp_dst) { 327844549623SQuentin Monnet pr_err("BUG: BPF-to-BPF call has no destination recorded\n"); 327944549623SQuentin Monnet return -ELOOP; 328044549623SQuentin Monnet } 328144549623SQuentin Monnet if (nfp_prog->subprog[meta->jmp_dst->subprog_idx].needs_reg_push) { 3282389f263bSQuentin Monnet ret_tgt = nfp_prog_current_offset(nfp_prog) + 3; 3283389f263bSQuentin Monnet emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, 3284389f263bSQuentin Monnet RELO_BR_GO_CALL_PUSH_REGS); 3285bdf4c66fSQuentin Monnet offset_br = nfp_prog_current_offset(nfp_prog); 3286389f263bSQuentin Monnet wrp_immed_relo(nfp_prog, imm_b(nfp_prog), 0, RELO_IMMED_REL); 328744549623SQuentin Monnet } else { 328844549623SQuentin Monnet ret_tgt = nfp_prog_current_offset(nfp_prog) + 2; 3289e90287f3SJakub Kicinski emit_br(nfp_prog, BR_UNC, meta->insn.imm, 1); 329044549623SQuentin Monnet offset_br = nfp_prog_current_offset(nfp_prog); 329144549623SQuentin Monnet } 3292389f263bSQuentin Monnet wrp_immed_relo(nfp_prog, ret_reg(nfp_prog), ret_tgt, RELO_IMMED_REL); 3293389f263bSQuentin Monnet 3294389f263bSQuentin Monnet if (!nfp_prog_confirm_current_offset(nfp_prog, ret_tgt)) 3295389f263bSQuentin Monnet return -EINVAL; 3296389f263bSQuentin Monnet 3297389f263bSQuentin Monnet if (stack_depth) { 3298389f263bSQuentin Monnet tmp_reg = ur_load_imm_any(nfp_prog, stack_depth, 3299389f263bSQuentin Monnet stack_imm(nfp_prog)); 3300389f263bSQuentin Monnet emit_alu(nfp_prog, stack_reg(nfp_prog), 3301389f263bSQuentin Monnet stack_reg(nfp_prog), ALU_OP_SUB, tmp_reg); 3302389f263bSQuentin Monnet emit_csr_wr(nfp_prog, stack_reg(nfp_prog), 3303389f263bSQuentin Monnet NFP_CSR_ACT_LM_ADDR0); 3304389f263bSQuentin Monnet wrp_nops(nfp_prog, 3); 3305389f263bSQuentin Monnet } 3306389f263bSQuentin Monnet 3307bdf4c66fSQuentin Monnet meta->num_insns_after_br = nfp_prog_current_offset(nfp_prog); 3308bdf4c66fSQuentin Monnet meta->num_insns_after_br -= offset_br; 3309bdf4c66fSQuentin Monnet 3310389f263bSQuentin Monnet return 0; 3311389f263bSQuentin Monnet } 3312389f263bSQuentin Monnet 3313389f263bSQuentin Monnet static int helper_call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 33142cb230bdSJakub Kicinski { 33152cb230bdSJakub Kicinski switch (meta->insn.imm) { 33160d49eaf4SJakub Kicinski case BPF_FUNC_xdp_adjust_head: 33170d49eaf4SJakub Kicinski return adjust_head(nfp_prog, meta); 33180c261593SJakub Kicinski case BPF_FUNC_xdp_adjust_tail: 33190c261593SJakub Kicinski return adjust_tail(nfp_prog, meta); 332077a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 332144d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 3322bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 3323fc448497SJakub Kicinski return map_call_stack_common(nfp_prog, meta); 3324df4a37d8SJakub Kicinski case BPF_FUNC_get_prandom_u32: 3325df4a37d8SJakub Kicinski return nfp_get_prandom_u32(nfp_prog, meta); 33269816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 33279816dd35SJakub Kicinski return nfp_perf_event_output(nfp_prog, meta); 33282cb230bdSJakub Kicinski default: 33292cb230bdSJakub Kicinski WARN_ONCE(1, "verifier allowed unsupported function\n"); 33302cb230bdSJakub Kicinski return -EOPNOTSUPP; 33312cb230bdSJakub Kicinski } 33322cb230bdSJakub Kicinski } 33332cb230bdSJakub Kicinski 3334389f263bSQuentin Monnet static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3335389f263bSQuentin Monnet { 3336389f263bSQuentin Monnet if (is_mbpf_pseudo_call(meta)) 3337389f263bSQuentin Monnet return bpf_to_bpf_call(nfp_prog, meta); 3338389f263bSQuentin Monnet else 3339389f263bSQuentin Monnet return helper_call(nfp_prog, meta); 3340389f263bSQuentin Monnet } 3341389f263bSQuentin Monnet 3342389f263bSQuentin Monnet static bool nfp_is_main_function(struct nfp_insn_meta *meta) 3343389f263bSQuentin Monnet { 3344389f263bSQuentin Monnet return meta->subprog_idx == 0; 3345389f263bSQuentin Monnet } 3346389f263bSQuentin Monnet 3347d9ae7f2bSJakub Kicinski static int goto_out(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3348d9ae7f2bSJakub Kicinski { 3349e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 0, RELO_BR_GO_OUT); 3350d9ae7f2bSJakub Kicinski 3351d9ae7f2bSJakub Kicinski return 0; 3352d9ae7f2bSJakub Kicinski } 3353d9ae7f2bSJakub Kicinski 3354389f263bSQuentin Monnet static int 3355389f263bSQuentin Monnet nfp_subprog_epilogue(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3356389f263bSQuentin Monnet { 335744549623SQuentin Monnet if (nfp_prog->subprog[meta->subprog_idx].needs_reg_push) { 3358389f263bSQuentin Monnet /* Pop R6~R9 to the stack via related subroutine. 335944549623SQuentin Monnet * We loaded the return address to the caller into ret_reg(). 336044549623SQuentin Monnet * This means that the subroutine does not come back here, we 336144549623SQuentin Monnet * make it jump back to the subprogram caller directly! 3362389f263bSQuentin Monnet */ 3363389f263bSQuentin Monnet emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 1, 3364389f263bSQuentin Monnet RELO_BR_GO_CALL_POP_REGS); 336544549623SQuentin Monnet /* Pop return address from the stack. */ 3366389f263bSQuentin Monnet wrp_mov(nfp_prog, ret_reg(nfp_prog), reg_lm(0, 0)); 336744549623SQuentin Monnet } else { 336844549623SQuentin Monnet /* Pop return address from the stack. */ 336944549623SQuentin Monnet wrp_mov(nfp_prog, ret_reg(nfp_prog), reg_lm(0, 0)); 337044549623SQuentin Monnet /* Jump back to caller if no callee-saved registers were used 337144549623SQuentin Monnet * by the subprogram. 337244549623SQuentin Monnet */ 337344549623SQuentin Monnet emit_rtn(nfp_prog, ret_reg(nfp_prog), 0); 337444549623SQuentin Monnet } 3375389f263bSQuentin Monnet 3376389f263bSQuentin Monnet return 0; 3377389f263bSQuentin Monnet } 3378389f263bSQuentin Monnet 3379389f263bSQuentin Monnet static int jmp_exit(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3380389f263bSQuentin Monnet { 3381389f263bSQuentin Monnet if (nfp_is_main_function(meta)) 3382389f263bSQuentin Monnet return goto_out(nfp_prog, meta); 3383389f263bSQuentin Monnet else 3384389f263bSQuentin Monnet return nfp_subprog_epilogue(nfp_prog, meta); 3385389f263bSQuentin Monnet } 3386389f263bSQuentin Monnet 3387d9ae7f2bSJakub Kicinski static const instr_cb_t instr_cb[256] = { 3388d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_X] = mov_reg64, 3389d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_MOV | BPF_K] = mov_imm64, 3390d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_X] = xor_reg64, 3391d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_XOR | BPF_K] = xor_imm64, 3392d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_X] = and_reg64, 3393d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_AND | BPF_K] = and_imm64, 3394d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_X] = or_reg64, 3395d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_OR | BPF_K] = or_imm64, 3396d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_X] = add_reg64, 3397d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_ADD | BPF_K] = add_imm64, 3398d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_X] = sub_reg64, 3399d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_SUB | BPF_K] = sub_imm64, 3400d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_X] = mul_reg64, 3401d3d23fdbSJiong Wang [BPF_ALU64 | BPF_MUL | BPF_K] = mul_imm64, 34022a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_X] = div_reg64, 34032a952b03SJiong Wang [BPF_ALU64 | BPF_DIV | BPF_K] = div_imm64, 3404254ef4d7SJiong Wang [BPF_ALU64 | BPF_NEG] = neg_reg64, 3405991f5b36SJiong Wang [BPF_ALU64 | BPF_LSH | BPF_X] = shl_reg64, 3406d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_LSH | BPF_K] = shl_imm64, 3407991f5b36SJiong Wang [BPF_ALU64 | BPF_RSH | BPF_X] = shr_reg64, 3408d9ae7f2bSJakub Kicinski [BPF_ALU64 | BPF_RSH | BPF_K] = shr_imm64, 3409c217abccSJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_X] = ashr_reg64, 3410f43d0f17SJiong Wang [BPF_ALU64 | BPF_ARSH | BPF_K] = ashr_imm64, 3411d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_X] = mov_reg, 3412d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_MOV | BPF_K] = mov_imm, 3413d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_X] = xor_reg, 3414d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_XOR | BPF_K] = xor_imm, 3415d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_X] = and_reg, 3416d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_AND | BPF_K] = and_imm, 3417d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_X] = or_reg, 3418d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_OR | BPF_K] = or_imm, 3419d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_X] = add_reg, 3420d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_ADD | BPF_K] = add_imm, 3421d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_X] = sub_reg, 3422d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_SUB | BPF_K] = sub_imm, 3423d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_X] = mul_reg, 3424d3d23fdbSJiong Wang [BPF_ALU | BPF_MUL | BPF_K] = mul_imm, 34252a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_X] = div_reg, 34262a952b03SJiong Wang [BPF_ALU | BPF_DIV | BPF_K] = div_imm, 3427254ef4d7SJiong Wang [BPF_ALU | BPF_NEG] = neg_reg, 3428ac7a1717SJiong Wang [BPF_ALU | BPF_LSH | BPF_X] = shl_reg, 3429d9ae7f2bSJakub Kicinski [BPF_ALU | BPF_LSH | BPF_K] = shl_imm, 3430ac7a1717SJiong Wang [BPF_ALU | BPF_RSH | BPF_X] = shr_reg, 3431ac7a1717SJiong Wang [BPF_ALU | BPF_RSH | BPF_K] = shr_imm, 343284708c13SJiong Wang [BPF_ALU | BPF_ARSH | BPF_X] = ashr_reg, 343384708c13SJiong Wang [BPF_ALU | BPF_ARSH | BPF_K] = ashr_imm, 34343119d1fdSJakub Kicinski [BPF_ALU | BPF_END | BPF_X] = end_reg32, 3435d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IMM | BPF_DW] = imm_ld8, 3436d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_B] = data_ld1, 3437d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_H] = data_ld2, 3438d9ae7f2bSJakub Kicinski [BPF_LD | BPF_ABS | BPF_W] = data_ld4, 3439d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_B] = data_ind_ld1, 3440d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_H] = data_ind_ld2, 3441d9ae7f2bSJakub Kicinski [BPF_LD | BPF_IND | BPF_W] = data_ind_ld4, 34422ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_B] = mem_ldx1, 34432ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_H] = mem_ldx2, 3444d9ae7f2bSJakub Kicinski [BPF_LDX | BPF_MEM | BPF_W] = mem_ldx4, 34452ca71441SJakub Kicinski [BPF_LDX | BPF_MEM | BPF_DW] = mem_ldx8, 3446e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_B] = mem_stx1, 3447e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_H] = mem_stx2, 3448d9ae7f2bSJakub Kicinski [BPF_STX | BPF_MEM | BPF_W] = mem_stx4, 3449e663fe38SJakub Kicinski [BPF_STX | BPF_MEM | BPF_DW] = mem_stx8, 3450dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_W] = mem_xadd4, 3451dcb0c27fSJakub Kicinski [BPF_STX | BPF_XADD | BPF_DW] = mem_xadd8, 3452e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_B] = mem_st1, 3453e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_H] = mem_st2, 3454e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_W] = mem_st4, 3455e663fe38SJakub Kicinski [BPF_ST | BPF_MEM | BPF_DW] = mem_st8, 3456d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JA | BPF_K] = jump, 3457d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_K] = jeq_imm, 345861dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_K] = cmp_imm, 345961dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_K] = cmp_imm, 346061dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_K] = cmp_imm, 346161dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_K] = cmp_imm, 346261dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_K] = cmp_imm, 346361dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_K] = cmp_imm, 346461dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_K] = cmp_imm, 346561dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_K] = cmp_imm, 3466d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_K] = jset_imm, 3467d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_K] = jne_imm, 3468d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JEQ | BPF_X] = jeq_reg, 346961dd8f00SJakub Kicinski [BPF_JMP | BPF_JGT | BPF_X] = cmp_reg, 347061dd8f00SJakub Kicinski [BPF_JMP | BPF_JGE | BPF_X] = cmp_reg, 347161dd8f00SJakub Kicinski [BPF_JMP | BPF_JLT | BPF_X] = cmp_reg, 347261dd8f00SJakub Kicinski [BPF_JMP | BPF_JLE | BPF_X] = cmp_reg, 347361dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGT | BPF_X] = cmp_reg, 347461dd8f00SJakub Kicinski [BPF_JMP | BPF_JSGE | BPF_X] = cmp_reg, 347561dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLT | BPF_X] = cmp_reg, 347661dd8f00SJakub Kicinski [BPF_JMP | BPF_JSLE | BPF_X] = cmp_reg, 3477d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JSET | BPF_X] = jset_reg, 3478d9ae7f2bSJakub Kicinski [BPF_JMP | BPF_JNE | BPF_X] = jne_reg, 347946144839SJiong Wang [BPF_JMP32 | BPF_JEQ | BPF_K] = jeq32_imm, 348046144839SJiong Wang [BPF_JMP32 | BPF_JGT | BPF_K] = cmp_imm, 348146144839SJiong Wang [BPF_JMP32 | BPF_JGE | BPF_K] = cmp_imm, 348246144839SJiong Wang [BPF_JMP32 | BPF_JLT | BPF_K] = cmp_imm, 348346144839SJiong Wang [BPF_JMP32 | BPF_JLE | BPF_K] = cmp_imm, 348446144839SJiong Wang [BPF_JMP32 | BPF_JSGT | BPF_K] =cmp_imm, 348546144839SJiong Wang [BPF_JMP32 | BPF_JSGE | BPF_K] =cmp_imm, 348646144839SJiong Wang [BPF_JMP32 | BPF_JSLT | BPF_K] =cmp_imm, 348746144839SJiong Wang [BPF_JMP32 | BPF_JSLE | BPF_K] =cmp_imm, 348846144839SJiong Wang [BPF_JMP32 | BPF_JSET | BPF_K] =jset_imm, 348946144839SJiong Wang [BPF_JMP32 | BPF_JNE | BPF_K] = jne_imm, 349046144839SJiong Wang [BPF_JMP32 | BPF_JEQ | BPF_X] = jeq_reg, 349146144839SJiong Wang [BPF_JMP32 | BPF_JGT | BPF_X] = cmp_reg, 349246144839SJiong Wang [BPF_JMP32 | BPF_JGE | BPF_X] = cmp_reg, 349346144839SJiong Wang [BPF_JMP32 | BPF_JLT | BPF_X] = cmp_reg, 349446144839SJiong Wang [BPF_JMP32 | BPF_JLE | BPF_X] = cmp_reg, 349546144839SJiong Wang [BPF_JMP32 | BPF_JSGT | BPF_X] =cmp_reg, 349646144839SJiong Wang [BPF_JMP32 | BPF_JSGE | BPF_X] =cmp_reg, 349746144839SJiong Wang [BPF_JMP32 | BPF_JSLT | BPF_X] =cmp_reg, 349846144839SJiong Wang [BPF_JMP32 | BPF_JSLE | BPF_X] =cmp_reg, 349946144839SJiong Wang [BPF_JMP32 | BPF_JSET | BPF_X] =jset_reg, 350046144839SJiong Wang [BPF_JMP32 | BPF_JNE | BPF_X] = jne_reg, 35012cb230bdSJakub Kicinski [BPF_JMP | BPF_CALL] = call, 3502389f263bSQuentin Monnet [BPF_JMP | BPF_EXIT] = jmp_exit, 3503d9ae7f2bSJakub Kicinski }; 3504d9ae7f2bSJakub Kicinski 3505d9ae7f2bSJakub Kicinski /* --- Assembler logic --- */ 35062178f3f0SQuentin Monnet static int 35072178f3f0SQuentin Monnet nfp_fixup_immed_relo(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 35082178f3f0SQuentin Monnet struct nfp_insn_meta *jmp_dst, u32 br_idx) 35092178f3f0SQuentin Monnet { 35102178f3f0SQuentin Monnet if (immed_get_value(nfp_prog->prog[br_idx + 1])) { 35112178f3f0SQuentin Monnet pr_err("BUG: failed to fix up callee register saving\n"); 35122178f3f0SQuentin Monnet return -EINVAL; 35132178f3f0SQuentin Monnet } 35142178f3f0SQuentin Monnet 35152178f3f0SQuentin Monnet immed_set_value(&nfp_prog->prog[br_idx + 1], jmp_dst->off); 35162178f3f0SQuentin Monnet 35172178f3f0SQuentin Monnet return 0; 35182178f3f0SQuentin Monnet } 35192178f3f0SQuentin Monnet 3520d9ae7f2bSJakub Kicinski static int nfp_fixup_branches(struct nfp_prog *nfp_prog) 3521d9ae7f2bSJakub Kicinski { 35225b674140SJiong Wang struct nfp_insn_meta *meta, *jmp_dst; 3523854dc87dSJiong Wang u32 idx, br_idx; 35242178f3f0SQuentin Monnet int err; 3525d9ae7f2bSJakub Kicinski 3526854dc87dSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 352791a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) 3528d9ae7f2bSJakub Kicinski continue; 352946144839SJiong Wang if (!is_mbpf_jmp(meta)) 3530d9ae7f2bSJakub Kicinski continue; 3531bdf4c66fSQuentin Monnet if (meta->insn.code == (BPF_JMP | BPF_EXIT) && 3532bdf4c66fSQuentin Monnet !nfp_is_main_function(meta)) 3533bdf4c66fSQuentin Monnet continue; 3534bdf4c66fSQuentin Monnet if (is_mbpf_helper_call(meta)) 3535bdf4c66fSQuentin Monnet continue; 3536d9ae7f2bSJakub Kicinski 35375b674140SJiong Wang if (list_is_last(&meta->l, &nfp_prog->insns)) 35382314fe9eSJakub Kicinski br_idx = nfp_prog->last_bpf_off; 35395b674140SJiong Wang else 35402314fe9eSJakub Kicinski br_idx = list_next_entry(meta, l)->off - 1; 3541854dc87dSJiong Wang 3542bdf4c66fSQuentin Monnet /* For BPF-to-BPF function call, a stack adjustment sequence is 3543bdf4c66fSQuentin Monnet * generated after the return instruction. Therefore, we must 3544bdf4c66fSQuentin Monnet * withdraw the length of this sequence to have br_idx pointing 3545bdf4c66fSQuentin Monnet * to where the "branch" NFP instruction is expected to be. 3546bdf4c66fSQuentin Monnet */ 3547bdf4c66fSQuentin Monnet if (is_mbpf_pseudo_call(meta)) 3548bdf4c66fSQuentin Monnet br_idx -= meta->num_insns_after_br; 3549bdf4c66fSQuentin Monnet 3550d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[br_idx])) { 3551d9ae7f2bSJakub Kicinski pr_err("Fixup found block not ending in branch %d %02x %016llx!!\n", 3552d9ae7f2bSJakub Kicinski br_idx, meta->insn.code, nfp_prog->prog[br_idx]); 3553d9ae7f2bSJakub Kicinski return -ELOOP; 3554d9ae7f2bSJakub Kicinski } 3555bdf4c66fSQuentin Monnet 3556bdf4c66fSQuentin Monnet if (meta->insn.code == (BPF_JMP | BPF_EXIT)) 3557bdf4c66fSQuentin Monnet continue; 3558bdf4c66fSQuentin Monnet 3559d9ae7f2bSJakub Kicinski /* Leave special branches for later */ 35602314fe9eSJakub Kicinski if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 35612178f3f0SQuentin Monnet RELO_BR_REL && !is_mbpf_pseudo_call(meta)) 3562d9ae7f2bSJakub Kicinski continue; 3563d9ae7f2bSJakub Kicinski 35645b674140SJiong Wang if (!meta->jmp_dst) { 35655b674140SJiong Wang pr_err("Non-exit jump doesn't have destination info recorded!!\n"); 3566d9ae7f2bSJakub Kicinski return -ELOOP; 3567d9ae7f2bSJakub Kicinski } 3568d9ae7f2bSJakub Kicinski 35695b674140SJiong Wang jmp_dst = meta->jmp_dst; 3570854dc87dSJiong Wang 357191a87a58SJakub Kicinski if (jmp_dst->flags & FLAG_INSN_SKIP_PREC_DEPENDENT) { 3572d9ae7f2bSJakub Kicinski pr_err("Branch landing on removed instruction!!\n"); 3573d9ae7f2bSJakub Kicinski return -ELOOP; 3574d9ae7f2bSJakub Kicinski } 3575d9ae7f2bSJakub Kicinski 357644549623SQuentin Monnet if (is_mbpf_pseudo_call(meta) && 357744549623SQuentin Monnet nfp_prog->subprog[jmp_dst->subprog_idx].needs_reg_push) { 35782178f3f0SQuentin Monnet err = nfp_fixup_immed_relo(nfp_prog, meta, 35792178f3f0SQuentin Monnet jmp_dst, br_idx); 35802178f3f0SQuentin Monnet if (err) 35812178f3f0SQuentin Monnet return err; 35822178f3f0SQuentin Monnet } 35832178f3f0SQuentin Monnet 35842178f3f0SQuentin Monnet if (FIELD_GET(OP_RELO_TYPE, nfp_prog->prog[br_idx]) != 35852178f3f0SQuentin Monnet RELO_BR_REL) 35862178f3f0SQuentin Monnet continue; 35872178f3f0SQuentin Monnet 35882314fe9eSJakub Kicinski for (idx = meta->off; idx <= br_idx; idx++) { 3589d9ae7f2bSJakub Kicinski if (!nfp_is_br(nfp_prog->prog[idx])) 3590d9ae7f2bSJakub Kicinski continue; 35915b674140SJiong Wang br_set_offset(&nfp_prog->prog[idx], jmp_dst->off); 3592d9ae7f2bSJakub Kicinski } 3593d9ae7f2bSJakub Kicinski } 3594d9ae7f2bSJakub Kicinski 3595d9ae7f2bSJakub Kicinski return 0; 3596d9ae7f2bSJakub Kicinski } 3597d9ae7f2bSJakub Kicinski 3598d9ae7f2bSJakub Kicinski static void nfp_intro(struct nfp_prog *nfp_prog) 3599d9ae7f2bSJakub Kicinski { 360018e53b6cSJakub Kicinski wrp_immed(nfp_prog, plen_reg(nfp_prog), GENMASK(13, 0)); 360118e53b6cSJakub Kicinski emit_alu(nfp_prog, plen_reg(nfp_prog), 360218e53b6cSJakub Kicinski plen_reg(nfp_prog), ALU_OP_AND, pv_len(nfp_prog)); 3603d9ae7f2bSJakub Kicinski } 3604d9ae7f2bSJakub Kicinski 3605389f263bSQuentin Monnet static void 3606389f263bSQuentin Monnet nfp_subprog_prologue(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3607389f263bSQuentin Monnet { 3608389f263bSQuentin Monnet /* Save return address into the stack. */ 3609389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_lm(0, 0), ret_reg(nfp_prog)); 3610389f263bSQuentin Monnet } 3611389f263bSQuentin Monnet 3612389f263bSQuentin Monnet static void 3613389f263bSQuentin Monnet nfp_start_subprog(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) 3614389f263bSQuentin Monnet { 3615389f263bSQuentin Monnet unsigned int depth = nfp_prog->subprog[meta->subprog_idx].stack_depth; 3616389f263bSQuentin Monnet 3617389f263bSQuentin Monnet nfp_prog->stack_frame_depth = round_up(depth, 4); 3618389f263bSQuentin Monnet nfp_subprog_prologue(nfp_prog, meta); 3619389f263bSQuentin Monnet } 3620389f263bSQuentin Monnet 3621389f263bSQuentin Monnet bool nfp_is_subprog_start(struct nfp_insn_meta *meta) 3622389f263bSQuentin Monnet { 3623389f263bSQuentin Monnet return meta->flags & FLAG_INSN_IS_SUBPROG_START; 3624389f263bSQuentin Monnet } 3625389f263bSQuentin Monnet 3626d9ae7f2bSJakub Kicinski static void nfp_outro_tc_da(struct nfp_prog *nfp_prog) 3627d9ae7f2bSJakub Kicinski { 3628d9ae7f2bSJakub Kicinski /* TC direct-action mode: 3629d9ae7f2bSJakub Kicinski * 0,1 ok NOT SUPPORTED[1] 3630d9ae7f2bSJakub Kicinski * 2 drop 0x22 -> drop, count as stat1 3631d9ae7f2bSJakub Kicinski * 4,5 nuke 0x02 -> drop 3632d9ae7f2bSJakub Kicinski * 7 redir 0x44 -> redir, count as stat2 3633d9ae7f2bSJakub Kicinski * * unspec 0x11 -> pass, count as stat0 3634d9ae7f2bSJakub Kicinski * 3635d9ae7f2bSJakub Kicinski * [1] We can't support OK and RECLASSIFY because we can't tell TC 3636d9ae7f2bSJakub Kicinski * the exact decision made. We are forced to support UNSPEC 3637d9ae7f2bSJakub Kicinski * to handle aborts so that's the only one we handle for passing 3638d9ae7f2bSJakub Kicinski * packets up the stack. 3639d9ae7f2bSJakub Kicinski */ 3640d9ae7f2bSJakub Kicinski /* Target for aborts */ 3641d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3642d9ae7f2bSJakub Kicinski 3643e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3644d9ae7f2bSJakub Kicinski 3645c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3646d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x11), SHF_SC_L_SHF, 16); 3647d9ae7f2bSJakub Kicinski 3648d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3649d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3650d9ae7f2bSJakub Kicinski 3651d9ae7f2bSJakub Kicinski /* if R0 > 7 jump to abort */ 3652d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(7), ALU_OP_SUB, reg_b(0)); 3653d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3654c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3655d9ae7f2bSJakub Kicinski 3656d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x41221211); 3657d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(3), 0x41001211); 3658d9ae7f2bSJakub Kicinski 3659d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3660d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 2); 3661d9ae7f2bSJakub Kicinski 3662d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3663d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(2), 3664d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3665d9ae7f2bSJakub Kicinski 3666d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3667d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3668d9ae7f2bSJakub Kicinski reg_imm(0xf), SHF_OP_AND, reg_b(3), SHF_SC_R_SHF, 0); 3669d9ae7f2bSJakub Kicinski 3670e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3671d9ae7f2bSJakub Kicinski 3672d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3673d9ae7f2bSJakub Kicinski reg_a(2), SHF_OP_OR, reg_b(2), SHF_SC_L_SHF, 4); 3674d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3675d9ae7f2bSJakub Kicinski } 3676d9ae7f2bSJakub Kicinski 3677d9ae7f2bSJakub Kicinski static void nfp_outro_xdp(struct nfp_prog *nfp_prog) 3678d9ae7f2bSJakub Kicinski { 3679d9ae7f2bSJakub Kicinski /* XDP return codes: 3680d9ae7f2bSJakub Kicinski * 0 aborted 0x82 -> drop, count as stat3 3681d9ae7f2bSJakub Kicinski * 1 drop 0x22 -> drop, count as stat1 3682d9ae7f2bSJakub Kicinski * 2 pass 0x11 -> pass, count as stat0 3683d9ae7f2bSJakub Kicinski * 3 tx 0x44 -> redir, count as stat2 3684d9ae7f2bSJakub Kicinski * * unknown 0x82 -> drop, count as stat3 3685d9ae7f2bSJakub Kicinski */ 3686d9ae7f2bSJakub Kicinski /* Target for aborts */ 3687d9ae7f2bSJakub Kicinski nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); 3688d9ae7f2bSJakub Kicinski 3689e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3690d9ae7f2bSJakub Kicinski 3691c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3692d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_imm(0x82), SHF_SC_L_SHF, 16); 3693d9ae7f2bSJakub Kicinski 3694d9ae7f2bSJakub Kicinski /* Target for normal exits */ 3695d9ae7f2bSJakub Kicinski nfp_prog->tgt_out = nfp_prog_current_offset(nfp_prog); 3696d9ae7f2bSJakub Kicinski 3697d9ae7f2bSJakub Kicinski /* if R0 > 3 jump to abort */ 3698d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_imm(3), ALU_OP_SUB, reg_b(0)); 3699d9ae7f2bSJakub Kicinski emit_br(nfp_prog, BR_BLO, nfp_prog->tgt_abort, 0); 3700d9ae7f2bSJakub Kicinski 3701d9ae7f2bSJakub Kicinski wrp_immed(nfp_prog, reg_b(2), 0x44112282); 3702d9ae7f2bSJakub Kicinski 3703d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_a(1), 3704d9ae7f2bSJakub Kicinski reg_none(), SHF_OP_NONE, reg_b(0), SHF_SC_L_SHF, 3); 3705d9ae7f2bSJakub Kicinski 3706d9ae7f2bSJakub Kicinski emit_alu(nfp_prog, reg_none(), reg_a(1), ALU_OP_OR, reg_imm(0)); 3707d9ae7f2bSJakub Kicinski emit_shf(nfp_prog, reg_b(2), 3708d9ae7f2bSJakub Kicinski reg_imm(0xff), SHF_OP_AND, reg_b(2), SHF_SC_R_SHF, 0); 3709d9ae7f2bSJakub Kicinski 3710e84797feSJakub Kicinski emit_br_relo(nfp_prog, BR_UNC, BR_OFF_RELO, 2, RELO_BR_NEXT_PKT); 3711d9ae7f2bSJakub Kicinski 3712c000dfb5SJakub Kicinski wrp_mov(nfp_prog, reg_a(0), NFP_BPF_ABI_FLAGS); 3713d9ae7f2bSJakub Kicinski emit_ld_field(nfp_prog, reg_a(0), 0xc, reg_b(2), SHF_SC_L_SHF, 16); 3714d9ae7f2bSJakub Kicinski } 3715d9ae7f2bSJakub Kicinski 371644549623SQuentin Monnet static bool nfp_prog_needs_callee_reg_save(struct nfp_prog *nfp_prog) 371744549623SQuentin Monnet { 371844549623SQuentin Monnet unsigned int idx; 371944549623SQuentin Monnet 372044549623SQuentin Monnet for (idx = 1; idx < nfp_prog->subprog_cnt; idx++) 372144549623SQuentin Monnet if (nfp_prog->subprog[idx].needs_reg_push) 372244549623SQuentin Monnet return true; 372344549623SQuentin Monnet 372444549623SQuentin Monnet return false; 372544549623SQuentin Monnet } 372644549623SQuentin Monnet 3727389f263bSQuentin Monnet static void nfp_push_callee_registers(struct nfp_prog *nfp_prog) 3728389f263bSQuentin Monnet { 3729389f263bSQuentin Monnet u8 reg; 3730389f263bSQuentin Monnet 3731389f263bSQuentin Monnet /* Subroutine: Save all callee saved registers (R6 ~ R9). 3732389f263bSQuentin Monnet * imm_b() holds the return address. 3733389f263bSQuentin Monnet */ 3734389f263bSQuentin Monnet nfp_prog->tgt_call_push_regs = nfp_prog_current_offset(nfp_prog); 3735389f263bSQuentin Monnet for (reg = BPF_REG_6; reg <= BPF_REG_9; reg++) { 3736389f263bSQuentin Monnet u8 adj = (reg - BPF_REG_0) * 2; 3737389f263bSQuentin Monnet u8 idx = (reg - BPF_REG_6) * 2; 3738389f263bSQuentin Monnet 3739389f263bSQuentin Monnet /* The first slot in the stack frame is used to push the return 3740389f263bSQuentin Monnet * address in bpf_to_bpf_call(), start just after. 3741389f263bSQuentin Monnet */ 3742389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_lm(0, 1 + idx), reg_b(adj)); 3743389f263bSQuentin Monnet 3744389f263bSQuentin Monnet if (reg == BPF_REG_8) 3745389f263bSQuentin Monnet /* Prepare to jump back, last 3 insns use defer slots */ 3746389f263bSQuentin Monnet emit_rtn(nfp_prog, imm_b(nfp_prog), 3); 3747389f263bSQuentin Monnet 3748389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_lm(0, 1 + idx + 1), reg_b(adj + 1)); 3749389f263bSQuentin Monnet } 3750389f263bSQuentin Monnet } 3751389f263bSQuentin Monnet 3752389f263bSQuentin Monnet static void nfp_pop_callee_registers(struct nfp_prog *nfp_prog) 3753389f263bSQuentin Monnet { 3754389f263bSQuentin Monnet u8 reg; 3755389f263bSQuentin Monnet 3756389f263bSQuentin Monnet /* Subroutine: Restore all callee saved registers (R6 ~ R9). 3757389f263bSQuentin Monnet * ret_reg() holds the return address. 3758389f263bSQuentin Monnet */ 3759389f263bSQuentin Monnet nfp_prog->tgt_call_pop_regs = nfp_prog_current_offset(nfp_prog); 3760389f263bSQuentin Monnet for (reg = BPF_REG_6; reg <= BPF_REG_9; reg++) { 3761389f263bSQuentin Monnet u8 adj = (reg - BPF_REG_0) * 2; 3762389f263bSQuentin Monnet u8 idx = (reg - BPF_REG_6) * 2; 3763389f263bSQuentin Monnet 3764389f263bSQuentin Monnet /* The first slot in the stack frame holds the return address, 3765389f263bSQuentin Monnet * start popping just after that. 3766389f263bSQuentin Monnet */ 3767389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_both(adj), reg_lm(0, 1 + idx)); 3768389f263bSQuentin Monnet 3769389f263bSQuentin Monnet if (reg == BPF_REG_8) 3770389f263bSQuentin Monnet /* Prepare to jump back, last 3 insns use defer slots */ 3771389f263bSQuentin Monnet emit_rtn(nfp_prog, ret_reg(nfp_prog), 3); 3772389f263bSQuentin Monnet 3773389f263bSQuentin Monnet wrp_mov(nfp_prog, reg_both(adj + 1), reg_lm(0, 1 + idx + 1)); 3774389f263bSQuentin Monnet } 3775389f263bSQuentin Monnet } 3776389f263bSQuentin Monnet 3777d9ae7f2bSJakub Kicinski static void nfp_outro(struct nfp_prog *nfp_prog) 3778d9ae7f2bSJakub Kicinski { 3779012bb8a8SJakub Kicinski switch (nfp_prog->type) { 3780012bb8a8SJakub Kicinski case BPF_PROG_TYPE_SCHED_CLS: 3781d9ae7f2bSJakub Kicinski nfp_outro_tc_da(nfp_prog); 3782d9ae7f2bSJakub Kicinski break; 3783012bb8a8SJakub Kicinski case BPF_PROG_TYPE_XDP: 3784d9ae7f2bSJakub Kicinski nfp_outro_xdp(nfp_prog); 3785d9ae7f2bSJakub Kicinski break; 3786012bb8a8SJakub Kicinski default: 3787012bb8a8SJakub Kicinski WARN_ON(1); 3788d9ae7f2bSJakub Kicinski } 3789389f263bSQuentin Monnet 379044549623SQuentin Monnet if (!nfp_prog_needs_callee_reg_save(nfp_prog)) 3791389f263bSQuentin Monnet return; 3792389f263bSQuentin Monnet 3793389f263bSQuentin Monnet nfp_push_callee_registers(nfp_prog); 3794389f263bSQuentin Monnet nfp_pop_callee_registers(nfp_prog); 3795d9ae7f2bSJakub Kicinski } 3796d9ae7f2bSJakub Kicinski 3797d9ae7f2bSJakub Kicinski static int nfp_translate(struct nfp_prog *nfp_prog) 3798d9ae7f2bSJakub Kicinski { 3799d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3800389f263bSQuentin Monnet unsigned int depth; 3801ff42bb9fSJakub Kicinski int err; 3802d9ae7f2bSJakub Kicinski 3803389f263bSQuentin Monnet depth = nfp_prog->subprog[0].stack_depth; 3804389f263bSQuentin Monnet nfp_prog->stack_frame_depth = round_up(depth, 4); 3805389f263bSQuentin Monnet 3806d9ae7f2bSJakub Kicinski nfp_intro(nfp_prog); 3807d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3808d9ae7f2bSJakub Kicinski return nfp_prog->error; 3809d9ae7f2bSJakub Kicinski 3810d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3811d9ae7f2bSJakub Kicinski instr_cb_t cb = instr_cb[meta->insn.code]; 3812d9ae7f2bSJakub Kicinski 3813d9ae7f2bSJakub Kicinski meta->off = nfp_prog_current_offset(nfp_prog); 3814d9ae7f2bSJakub Kicinski 3815389f263bSQuentin Monnet if (nfp_is_subprog_start(meta)) { 3816389f263bSQuentin Monnet nfp_start_subprog(nfp_prog, meta); 3817389f263bSQuentin Monnet if (nfp_prog->error) 3818389f263bSQuentin Monnet return nfp_prog->error; 3819389f263bSQuentin Monnet } 3820389f263bSQuentin Monnet 382191a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) { 3822d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3823d9ae7f2bSJakub Kicinski continue; 3824d9ae7f2bSJakub Kicinski } 3825d9ae7f2bSJakub Kicinski 3826d9ae7f2bSJakub Kicinski if (nfp_meta_has_prev(nfp_prog, meta) && 3827d9ae7f2bSJakub Kicinski nfp_meta_prev(meta)->double_cb) 3828d9ae7f2bSJakub Kicinski cb = nfp_meta_prev(meta)->double_cb; 3829d9ae7f2bSJakub Kicinski if (!cb) 3830d9ae7f2bSJakub Kicinski return -ENOENT; 3831d9ae7f2bSJakub Kicinski err = cb(nfp_prog, meta); 3832d9ae7f2bSJakub Kicinski if (err) 3833d9ae7f2bSJakub Kicinski return err; 3834e8a4796eSJakub Kicinski if (nfp_prog->error) 3835e8a4796eSJakub Kicinski return nfp_prog->error; 3836d9ae7f2bSJakub Kicinski 3837d9ae7f2bSJakub Kicinski nfp_prog->n_translated++; 3838d9ae7f2bSJakub Kicinski } 3839d9ae7f2bSJakub Kicinski 3840854dc87dSJiong Wang nfp_prog->last_bpf_off = nfp_prog_current_offset(nfp_prog) - 1; 3841854dc87dSJiong Wang 3842d9ae7f2bSJakub Kicinski nfp_outro(nfp_prog); 3843d9ae7f2bSJakub Kicinski if (nfp_prog->error) 3844d9ae7f2bSJakub Kicinski return nfp_prog->error; 3845d9ae7f2bSJakub Kicinski 3846ff42bb9fSJakub Kicinski wrp_nops(nfp_prog, NFP_USTORE_PREFETCH_WINDOW); 38471c03e03fSJakub Kicinski if (nfp_prog->error) 38481c03e03fSJakub Kicinski return nfp_prog->error; 38491c03e03fSJakub Kicinski 3850d9ae7f2bSJakub Kicinski return nfp_fixup_branches(nfp_prog); 3851d9ae7f2bSJakub Kicinski } 3852d9ae7f2bSJakub Kicinski 3853d9ae7f2bSJakub Kicinski /* --- Optimizations --- */ 3854d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_reg_init(struct nfp_prog *nfp_prog) 3855d9ae7f2bSJakub Kicinski { 3856d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta; 3857d9ae7f2bSJakub Kicinski 3858d9ae7f2bSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 3859d9ae7f2bSJakub Kicinski struct bpf_insn insn = meta->insn; 3860d9ae7f2bSJakub Kicinski 3861d9ae7f2bSJakub Kicinski /* Programs converted from cBPF start with register xoring */ 3862d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_XOR | BPF_X) && 3863d9ae7f2bSJakub Kicinski insn.src_reg == insn.dst_reg) 3864d9ae7f2bSJakub Kicinski continue; 3865d9ae7f2bSJakub Kicinski 3866d9ae7f2bSJakub Kicinski /* Programs start with R6 = R1 but we ignore the skb pointer */ 3867d9ae7f2bSJakub Kicinski if (insn.code == (BPF_ALU64 | BPF_MOV | BPF_X) && 3868d9ae7f2bSJakub Kicinski insn.src_reg == 1 && insn.dst_reg == 6) 386991a87a58SJakub Kicinski meta->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 3870d9ae7f2bSJakub Kicinski 3871d9ae7f2bSJakub Kicinski /* Return as soon as something doesn't match */ 387291a87a58SJakub Kicinski if (!(meta->flags & FLAG_INSN_SKIP_MASK)) 3873d9ae7f2bSJakub Kicinski return; 3874d9ae7f2bSJakub Kicinski } 3875d9ae7f2bSJakub Kicinski } 3876d9ae7f2bSJakub Kicinski 38776c59500cSJakub Kicinski /* abs(insn.imm) will fit better into unrestricted reg immediate - 38786c59500cSJakub Kicinski * convert add/sub of a negative number into a sub/add of a positive one. 38796c59500cSJakub Kicinski */ 38806c59500cSJakub Kicinski static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog) 38816c59500cSJakub Kicinski { 38826c59500cSJakub Kicinski struct nfp_insn_meta *meta; 38836c59500cSJakub Kicinski 38846c59500cSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 38856c59500cSJakub Kicinski struct bpf_insn insn = meta->insn; 38866c59500cSJakub Kicinski 388791a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) 38886c59500cSJakub Kicinski continue; 38896c59500cSJakub Kicinski 389046144839SJiong Wang if (!is_mbpf_alu(meta) && !is_mbpf_jmp(meta)) 38916c59500cSJakub Kicinski continue; 38926c59500cSJakub Kicinski if (BPF_SRC(insn.code) != BPF_K) 38936c59500cSJakub Kicinski continue; 38946c59500cSJakub Kicinski if (insn.imm >= 0) 38956c59500cSJakub Kicinski continue; 38966c59500cSJakub Kicinski 389746144839SJiong Wang if (is_mbpf_jmp(meta)) { 38987bdc97beSJakub Kicinski switch (BPF_OP(insn.code)) { 38997bdc97beSJakub Kicinski case BPF_JGE: 39007bdc97beSJakub Kicinski case BPF_JSGE: 39017bdc97beSJakub Kicinski case BPF_JLT: 39027bdc97beSJakub Kicinski case BPF_JSLT: 39037bdc97beSJakub Kicinski meta->jump_neg_op = true; 39047bdc97beSJakub Kicinski break; 39057bdc97beSJakub Kicinski default: 39067bdc97beSJakub Kicinski continue; 39077bdc97beSJakub Kicinski } 39087bdc97beSJakub Kicinski } else { 39096c59500cSJakub Kicinski if (BPF_OP(insn.code) == BPF_ADD) 39106c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_SUB; 39116c59500cSJakub Kicinski else if (BPF_OP(insn.code) == BPF_SUB) 39126c59500cSJakub Kicinski insn.code = BPF_CLASS(insn.code) | BPF_ADD; 39136c59500cSJakub Kicinski else 39146c59500cSJakub Kicinski continue; 39156c59500cSJakub Kicinski 39166c59500cSJakub Kicinski meta->insn.code = insn.code | BPF_K; 39177bdc97beSJakub Kicinski } 39186c59500cSJakub Kicinski 39196c59500cSJakub Kicinski meta->insn.imm = -insn.imm; 39206c59500cSJakub Kicinski } 39216c59500cSJakub Kicinski } 39226c59500cSJakub Kicinski 3923d9ae7f2bSJakub Kicinski /* Remove masking after load since our load guarantees this is not needed */ 3924d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog) 3925d9ae7f2bSJakub Kicinski { 3926d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 3927d9ae7f2bSJakub Kicinski const s32 exp_mask[] = { 3928d9ae7f2bSJakub Kicinski [BPF_B] = 0x000000ffU, 3929d9ae7f2bSJakub Kicinski [BPF_H] = 0x0000ffffU, 3930d9ae7f2bSJakub Kicinski [BPF_W] = 0xffffffffU, 3931d9ae7f2bSJakub Kicinski }; 3932d9ae7f2bSJakub Kicinski 3933d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 3934d9ae7f2bSJakub Kicinski struct bpf_insn insn, next; 3935d9ae7f2bSJakub Kicinski 3936d9ae7f2bSJakub Kicinski insn = meta1->insn; 3937d9ae7f2bSJakub Kicinski next = meta2->insn; 3938d9ae7f2bSJakub Kicinski 3939d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3940d9ae7f2bSJakub Kicinski continue; 3941d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3942d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3943d9ae7f2bSJakub Kicinski continue; 3944d9ae7f2bSJakub Kicinski 3945d9ae7f2bSJakub Kicinski if (next.code != (BPF_ALU64 | BPF_AND | BPF_K)) 3946d9ae7f2bSJakub Kicinski continue; 3947d9ae7f2bSJakub Kicinski 3948d9ae7f2bSJakub Kicinski if (!exp_mask[BPF_SIZE(insn.code)]) 3949d9ae7f2bSJakub Kicinski continue; 3950d9ae7f2bSJakub Kicinski if (exp_mask[BPF_SIZE(insn.code)] != next.imm) 3951d9ae7f2bSJakub Kicinski continue; 3952d9ae7f2bSJakub Kicinski 3953d9ae7f2bSJakub Kicinski if (next.src_reg || next.dst_reg) 3954d9ae7f2bSJakub Kicinski continue; 3955d9ae7f2bSJakub Kicinski 39561266f5d6SJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST) 39571266f5d6SJiong Wang continue; 39581266f5d6SJiong Wang 395991a87a58SJakub Kicinski meta2->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 3960d9ae7f2bSJakub Kicinski } 3961d9ae7f2bSJakub Kicinski } 3962d9ae7f2bSJakub Kicinski 3963d9ae7f2bSJakub Kicinski static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog) 3964d9ae7f2bSJakub Kicinski { 3965d9ae7f2bSJakub Kicinski struct nfp_insn_meta *meta1, *meta2, *meta3; 3966d9ae7f2bSJakub Kicinski 3967d9ae7f2bSJakub Kicinski nfp_for_each_insn_walk3(nfp_prog, meta1, meta2, meta3) { 3968d9ae7f2bSJakub Kicinski struct bpf_insn insn, next1, next2; 3969d9ae7f2bSJakub Kicinski 3970d9ae7f2bSJakub Kicinski insn = meta1->insn; 3971d9ae7f2bSJakub Kicinski next1 = meta2->insn; 3972d9ae7f2bSJakub Kicinski next2 = meta3->insn; 3973d9ae7f2bSJakub Kicinski 3974d9ae7f2bSJakub Kicinski if (BPF_CLASS(insn.code) != BPF_LD) 3975d9ae7f2bSJakub Kicinski continue; 3976d9ae7f2bSJakub Kicinski if (BPF_MODE(insn.code) != BPF_ABS && 3977d9ae7f2bSJakub Kicinski BPF_MODE(insn.code) != BPF_IND) 3978d9ae7f2bSJakub Kicinski continue; 3979d9ae7f2bSJakub Kicinski if (BPF_SIZE(insn.code) != BPF_W) 3980d9ae7f2bSJakub Kicinski continue; 3981d9ae7f2bSJakub Kicinski 3982d9ae7f2bSJakub Kicinski if (!(next1.code == (BPF_LSH | BPF_K | BPF_ALU64) && 3983d9ae7f2bSJakub Kicinski next2.code == (BPF_RSH | BPF_K | BPF_ALU64)) && 3984d9ae7f2bSJakub Kicinski !(next1.code == (BPF_RSH | BPF_K | BPF_ALU64) && 3985d9ae7f2bSJakub Kicinski next2.code == (BPF_LSH | BPF_K | BPF_ALU64))) 3986d9ae7f2bSJakub Kicinski continue; 3987d9ae7f2bSJakub Kicinski 3988d9ae7f2bSJakub Kicinski if (next1.src_reg || next1.dst_reg || 3989d9ae7f2bSJakub Kicinski next2.src_reg || next2.dst_reg) 3990d9ae7f2bSJakub Kicinski continue; 3991d9ae7f2bSJakub Kicinski 3992d9ae7f2bSJakub Kicinski if (next1.imm != 0x20 || next2.imm != 0x20) 3993d9ae7f2bSJakub Kicinski continue; 3994d9ae7f2bSJakub Kicinski 399529fe46efSJiong Wang if (meta2->flags & FLAG_INSN_IS_JUMP_DST || 399629fe46efSJiong Wang meta3->flags & FLAG_INSN_IS_JUMP_DST) 399729fe46efSJiong Wang continue; 399829fe46efSJiong Wang 399991a87a58SJakub Kicinski meta2->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 400091a87a58SJakub Kicinski meta3->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 4001d9ae7f2bSJakub Kicinski } 4002d9ae7f2bSJakub Kicinski } 4003d9ae7f2bSJakub Kicinski 40046bc7103cSJiong Wang /* load/store pair that forms memory copy sould look like the following: 40056bc7103cSJiong Wang * 40066bc7103cSJiong Wang * ld_width R, [addr_src + offset_src] 40076bc7103cSJiong Wang * st_width [addr_dest + offset_dest], R 40086bc7103cSJiong Wang * 40096bc7103cSJiong Wang * The destination register of load and source register of store should 40106bc7103cSJiong Wang * be the same, load and store should also perform at the same width. 40116bc7103cSJiong Wang * If either of addr_src or addr_dest is stack pointer, we don't do the 40126bc7103cSJiong Wang * CPP optimization as stack is modelled by registers on NFP. 40136bc7103cSJiong Wang */ 40146bc7103cSJiong Wang static bool 40156bc7103cSJiong Wang curr_pair_is_memcpy(struct nfp_insn_meta *ld_meta, 40166bc7103cSJiong Wang struct nfp_insn_meta *st_meta) 40176bc7103cSJiong Wang { 40186bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 40196bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 40206bc7103cSJiong Wang 40216bc7103cSJiong Wang if (!is_mbpf_load(ld_meta) || !is_mbpf_store(st_meta)) 40226bc7103cSJiong Wang return false; 40236bc7103cSJiong Wang 4024cc0dff6dSJiong Wang if (ld_meta->ptr.type != PTR_TO_PACKET && 4025cc0dff6dSJiong Wang ld_meta->ptr.type != PTR_TO_MAP_VALUE) 40266bc7103cSJiong Wang return false; 40276bc7103cSJiong Wang 40286bc7103cSJiong Wang if (st_meta->ptr.type != PTR_TO_PACKET) 40296bc7103cSJiong Wang return false; 40306bc7103cSJiong Wang 40316bc7103cSJiong Wang if (BPF_SIZE(ld->code) != BPF_SIZE(st->code)) 40326bc7103cSJiong Wang return false; 40336bc7103cSJiong Wang 40346bc7103cSJiong Wang if (ld->dst_reg != st->src_reg) 40356bc7103cSJiong Wang return false; 40366bc7103cSJiong Wang 40376bc7103cSJiong Wang /* There is jump to the store insn in this pair. */ 40386bc7103cSJiong Wang if (st_meta->flags & FLAG_INSN_IS_JUMP_DST) 40396bc7103cSJiong Wang return false; 40406bc7103cSJiong Wang 40416bc7103cSJiong Wang return true; 40426bc7103cSJiong Wang } 40436bc7103cSJiong Wang 40446bc7103cSJiong Wang /* Currently, we only support chaining load/store pairs if: 40456bc7103cSJiong Wang * 40466bc7103cSJiong Wang * - Their address base registers are the same. 40476bc7103cSJiong Wang * - Their address offsets are in the same order. 40486bc7103cSJiong Wang * - They operate at the same memory width. 40496bc7103cSJiong Wang * - There is no jump into the middle of them. 40506bc7103cSJiong Wang */ 40516bc7103cSJiong Wang static bool 40526bc7103cSJiong Wang curr_pair_chain_with_previous(struct nfp_insn_meta *ld_meta, 40536bc7103cSJiong Wang struct nfp_insn_meta *st_meta, 40546bc7103cSJiong Wang struct bpf_insn *prev_ld, 40556bc7103cSJiong Wang struct bpf_insn *prev_st) 40566bc7103cSJiong Wang { 40576bc7103cSJiong Wang u8 prev_size, curr_size, prev_ld_base, prev_st_base, prev_ld_dst; 40586bc7103cSJiong Wang struct bpf_insn *ld = &ld_meta->insn; 40596bc7103cSJiong Wang struct bpf_insn *st = &st_meta->insn; 40606bc7103cSJiong Wang s16 prev_ld_off, prev_st_off; 40616bc7103cSJiong Wang 40626bc7103cSJiong Wang /* This pair is the start pair. */ 40636bc7103cSJiong Wang if (!prev_ld) 40646bc7103cSJiong Wang return true; 40656bc7103cSJiong Wang 40666bc7103cSJiong Wang prev_size = BPF_LDST_BYTES(prev_ld); 40676bc7103cSJiong Wang curr_size = BPF_LDST_BYTES(ld); 40686bc7103cSJiong Wang prev_ld_base = prev_ld->src_reg; 40696bc7103cSJiong Wang prev_st_base = prev_st->dst_reg; 40706bc7103cSJiong Wang prev_ld_dst = prev_ld->dst_reg; 40716bc7103cSJiong Wang prev_ld_off = prev_ld->off; 40726bc7103cSJiong Wang prev_st_off = prev_st->off; 40736bc7103cSJiong Wang 40746bc7103cSJiong Wang if (ld->dst_reg != prev_ld_dst) 40756bc7103cSJiong Wang return false; 40766bc7103cSJiong Wang 40776bc7103cSJiong Wang if (ld->src_reg != prev_ld_base || st->dst_reg != prev_st_base) 40786bc7103cSJiong Wang return false; 40796bc7103cSJiong Wang 40806bc7103cSJiong Wang if (curr_size != prev_size) 40816bc7103cSJiong Wang return false; 40826bc7103cSJiong Wang 40836bc7103cSJiong Wang /* There is jump to the head of this pair. */ 40846bc7103cSJiong Wang if (ld_meta->flags & FLAG_INSN_IS_JUMP_DST) 40856bc7103cSJiong Wang return false; 40866bc7103cSJiong Wang 40876bc7103cSJiong Wang /* Both in ascending order. */ 40886bc7103cSJiong Wang if (prev_ld_off + prev_size == ld->off && 40896bc7103cSJiong Wang prev_st_off + prev_size == st->off) 40906bc7103cSJiong Wang return true; 40916bc7103cSJiong Wang 40926bc7103cSJiong Wang /* Both in descending order. */ 40936bc7103cSJiong Wang if (ld->off + curr_size == prev_ld_off && 40946bc7103cSJiong Wang st->off + curr_size == prev_st_off) 40956bc7103cSJiong Wang return true; 40966bc7103cSJiong Wang 40976bc7103cSJiong Wang return false; 40986bc7103cSJiong Wang } 40996bc7103cSJiong Wang 41006bc7103cSJiong Wang /* Return TRUE if cross memory access happens. Cross memory access means 41016bc7103cSJiong Wang * store area is overlapping with load area that a later load might load 41026bc7103cSJiong Wang * the value from previous store, for this case we can't treat the sequence 41036bc7103cSJiong Wang * as an memory copy. 41046bc7103cSJiong Wang */ 41056bc7103cSJiong Wang static bool 41066bc7103cSJiong Wang cross_mem_access(struct bpf_insn *ld, struct nfp_insn_meta *head_ld_meta, 41076bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta) 41086bc7103cSJiong Wang { 41096bc7103cSJiong Wang s16 head_ld_off, head_st_off, ld_off; 41106bc7103cSJiong Wang 41116bc7103cSJiong Wang /* Different pointer types does not overlap. */ 41126bc7103cSJiong Wang if (head_ld_meta->ptr.type != head_st_meta->ptr.type) 41136bc7103cSJiong Wang return false; 41146bc7103cSJiong Wang 41156bc7103cSJiong Wang /* load and store are both PTR_TO_PACKET, check ID info. */ 41166bc7103cSJiong Wang if (head_ld_meta->ptr.id != head_st_meta->ptr.id) 41176bc7103cSJiong Wang return true; 41186bc7103cSJiong Wang 41196bc7103cSJiong Wang /* Canonicalize the offsets. Turn all of them against the original 41206bc7103cSJiong Wang * base register. 41216bc7103cSJiong Wang */ 41226bc7103cSJiong Wang head_ld_off = head_ld_meta->insn.off + head_ld_meta->ptr.off; 41236bc7103cSJiong Wang head_st_off = head_st_meta->insn.off + head_st_meta->ptr.off; 41246bc7103cSJiong Wang ld_off = ld->off + head_ld_meta->ptr.off; 41256bc7103cSJiong Wang 41266bc7103cSJiong Wang /* Ascending order cross. */ 41276bc7103cSJiong Wang if (ld_off > head_ld_off && 41286bc7103cSJiong Wang head_ld_off < head_st_off && ld_off >= head_st_off) 41296bc7103cSJiong Wang return true; 41306bc7103cSJiong Wang 41316bc7103cSJiong Wang /* Descending order cross. */ 41326bc7103cSJiong Wang if (ld_off < head_ld_off && 41336bc7103cSJiong Wang head_ld_off > head_st_off && ld_off <= head_st_off) 41346bc7103cSJiong Wang return true; 41356bc7103cSJiong Wang 41366bc7103cSJiong Wang return false; 41376bc7103cSJiong Wang } 41386bc7103cSJiong Wang 41396bc7103cSJiong Wang /* This pass try to identify the following instructoin sequences. 41406bc7103cSJiong Wang * 41416bc7103cSJiong Wang * load R, [regA + offA] 41426bc7103cSJiong Wang * store [regB + offB], R 41436bc7103cSJiong Wang * load R, [regA + offA + const_imm_A] 41446bc7103cSJiong Wang * store [regB + offB + const_imm_A], R 41456bc7103cSJiong Wang * load R, [regA + offA + 2 * const_imm_A] 41466bc7103cSJiong Wang * store [regB + offB + 2 * const_imm_A], R 41476bc7103cSJiong Wang * ... 41486bc7103cSJiong Wang * 41496bc7103cSJiong Wang * Above sequence is typically generated by compiler when lowering 41506bc7103cSJiong Wang * memcpy. NFP prefer using CPP instructions to accelerate it. 41516bc7103cSJiong Wang */ 41526bc7103cSJiong Wang static void nfp_bpf_opt_ldst_gather(struct nfp_prog *nfp_prog) 41536bc7103cSJiong Wang { 41546bc7103cSJiong Wang struct nfp_insn_meta *head_ld_meta = NULL; 41556bc7103cSJiong Wang struct nfp_insn_meta *head_st_meta = NULL; 41566bc7103cSJiong Wang struct nfp_insn_meta *meta1, *meta2; 41576bc7103cSJiong Wang struct bpf_insn *prev_ld = NULL; 41586bc7103cSJiong Wang struct bpf_insn *prev_st = NULL; 41596bc7103cSJiong Wang u8 count = 0; 41606bc7103cSJiong Wang 41616bc7103cSJiong Wang nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 41626bc7103cSJiong Wang struct bpf_insn *ld = &meta1->insn; 41636bc7103cSJiong Wang struct bpf_insn *st = &meta2->insn; 41646bc7103cSJiong Wang 41656bc7103cSJiong Wang /* Reset record status if any of the following if true: 41666bc7103cSJiong Wang * - The current insn pair is not load/store. 41676bc7103cSJiong Wang * - The load/store pair doesn't chain with previous one. 41686bc7103cSJiong Wang * - The chained load/store pair crossed with previous pair. 41696bc7103cSJiong Wang * - The chained load/store pair has a total size of memory 41706bc7103cSJiong Wang * copy beyond 128 bytes which is the maximum length a 41716bc7103cSJiong Wang * single NFP CPP command can transfer. 41726bc7103cSJiong Wang */ 41736bc7103cSJiong Wang if (!curr_pair_is_memcpy(meta1, meta2) || 41746bc7103cSJiong Wang !curr_pair_chain_with_previous(meta1, meta2, prev_ld, 41756bc7103cSJiong Wang prev_st) || 41766bc7103cSJiong Wang (head_ld_meta && (cross_mem_access(ld, head_ld_meta, 41776bc7103cSJiong Wang head_st_meta) || 41786bc7103cSJiong Wang head_ld_meta->ldst_gather_len >= 128))) { 41796bc7103cSJiong Wang if (!count) 41806bc7103cSJiong Wang continue; 41816bc7103cSJiong Wang 41826bc7103cSJiong Wang if (count > 1) { 41836bc7103cSJiong Wang s16 prev_ld_off = prev_ld->off; 41846bc7103cSJiong Wang s16 prev_st_off = prev_st->off; 41856bc7103cSJiong Wang s16 head_ld_off = head_ld_meta->insn.off; 41866bc7103cSJiong Wang 41876bc7103cSJiong Wang if (prev_ld_off < head_ld_off) { 41886bc7103cSJiong Wang head_ld_meta->insn.off = prev_ld_off; 41896bc7103cSJiong Wang head_st_meta->insn.off = prev_st_off; 41906bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 41916bc7103cSJiong Wang -head_ld_meta->ldst_gather_len; 41926bc7103cSJiong Wang } 41936bc7103cSJiong Wang 41946bc7103cSJiong Wang head_ld_meta->paired_st = &head_st_meta->insn; 419591a87a58SJakub Kicinski head_st_meta->flags |= 419691a87a58SJakub Kicinski FLAG_INSN_SKIP_PREC_DEPENDENT; 41976bc7103cSJiong Wang } else { 41986bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 0; 41996bc7103cSJiong Wang } 42006bc7103cSJiong Wang 42016bc7103cSJiong Wang /* If the chain is ended by an load/store pair then this 42026bc7103cSJiong Wang * could serve as the new head of the the next chain. 42036bc7103cSJiong Wang */ 42046bc7103cSJiong Wang if (curr_pair_is_memcpy(meta1, meta2)) { 42056bc7103cSJiong Wang head_ld_meta = meta1; 42066bc7103cSJiong Wang head_st_meta = meta2; 42076bc7103cSJiong Wang head_ld_meta->ldst_gather_len = 42086bc7103cSJiong Wang BPF_LDST_BYTES(ld); 42096bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 42106bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 42116bc7103cSJiong Wang prev_ld = ld; 42126bc7103cSJiong Wang prev_st = st; 42136bc7103cSJiong Wang count = 1; 42146bc7103cSJiong Wang } else { 42156bc7103cSJiong Wang head_ld_meta = NULL; 42166bc7103cSJiong Wang head_st_meta = NULL; 42176bc7103cSJiong Wang prev_ld = NULL; 42186bc7103cSJiong Wang prev_st = NULL; 42196bc7103cSJiong Wang count = 0; 42206bc7103cSJiong Wang } 42216bc7103cSJiong Wang 42226bc7103cSJiong Wang continue; 42236bc7103cSJiong Wang } 42246bc7103cSJiong Wang 42256bc7103cSJiong Wang if (!head_ld_meta) { 42266bc7103cSJiong Wang head_ld_meta = meta1; 42276bc7103cSJiong Wang head_st_meta = meta2; 42286bc7103cSJiong Wang } else { 422991a87a58SJakub Kicinski meta1->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 423091a87a58SJakub Kicinski meta2->flags |= FLAG_INSN_SKIP_PREC_DEPENDENT; 42316bc7103cSJiong Wang } 42326bc7103cSJiong Wang 42336bc7103cSJiong Wang head_ld_meta->ldst_gather_len += BPF_LDST_BYTES(ld); 42346bc7103cSJiong Wang meta1 = nfp_meta_next(meta1); 42356bc7103cSJiong Wang meta2 = nfp_meta_next(meta2); 42366bc7103cSJiong Wang prev_ld = ld; 42376bc7103cSJiong Wang prev_st = st; 42386bc7103cSJiong Wang count++; 42396bc7103cSJiong Wang } 42406bc7103cSJiong Wang } 42416bc7103cSJiong Wang 424287b10ecdSJiong Wang static void nfp_bpf_opt_pkt_cache(struct nfp_prog *nfp_prog) 424387b10ecdSJiong Wang { 424487b10ecdSJiong Wang struct nfp_insn_meta *meta, *range_node = NULL; 424587b10ecdSJiong Wang s16 range_start = 0, range_end = 0; 424687b10ecdSJiong Wang bool cache_avail = false; 424787b10ecdSJiong Wang struct bpf_insn *insn; 424887b10ecdSJiong Wang s32 range_ptr_off = 0; 424987b10ecdSJiong Wang u32 range_ptr_id = 0; 425087b10ecdSJiong Wang 425187b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 425287b10ecdSJiong Wang if (meta->flags & FLAG_INSN_IS_JUMP_DST) 425387b10ecdSJiong Wang cache_avail = false; 425487b10ecdSJiong Wang 425591a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) 425687b10ecdSJiong Wang continue; 425787b10ecdSJiong Wang 425887b10ecdSJiong Wang insn = &meta->insn; 425987b10ecdSJiong Wang 426087b10ecdSJiong Wang if (is_mbpf_store_pkt(meta) || 426187b10ecdSJiong Wang insn->code == (BPF_JMP | BPF_CALL) || 426287b10ecdSJiong Wang is_mbpf_classic_store_pkt(meta) || 426387b10ecdSJiong Wang is_mbpf_classic_load(meta)) { 426487b10ecdSJiong Wang cache_avail = false; 426587b10ecdSJiong Wang continue; 426687b10ecdSJiong Wang } 426787b10ecdSJiong Wang 426887b10ecdSJiong Wang if (!is_mbpf_load(meta)) 426987b10ecdSJiong Wang continue; 427087b10ecdSJiong Wang 427187b10ecdSJiong Wang if (meta->ptr.type != PTR_TO_PACKET || meta->ldst_gather_len) { 427287b10ecdSJiong Wang cache_avail = false; 427387b10ecdSJiong Wang continue; 427487b10ecdSJiong Wang } 427587b10ecdSJiong Wang 427687b10ecdSJiong Wang if (!cache_avail) { 427787b10ecdSJiong Wang cache_avail = true; 427887b10ecdSJiong Wang if (range_node) 427987b10ecdSJiong Wang goto end_current_then_start_new; 428087b10ecdSJiong Wang goto start_new; 428187b10ecdSJiong Wang } 428287b10ecdSJiong Wang 428387b10ecdSJiong Wang /* Check ID to make sure two reads share the same 428487b10ecdSJiong Wang * variable offset against PTR_TO_PACKET, and check OFF 428587b10ecdSJiong Wang * to make sure they also share the same constant 428687b10ecdSJiong Wang * offset. 428787b10ecdSJiong Wang * 428887b10ecdSJiong Wang * OFFs don't really need to be the same, because they 428987b10ecdSJiong Wang * are the constant offsets against PTR_TO_PACKET, so 429087b10ecdSJiong Wang * for different OFFs, we could canonicalize them to 429187b10ecdSJiong Wang * offsets against original packet pointer. We don't 429287b10ecdSJiong Wang * support this. 429387b10ecdSJiong Wang */ 429487b10ecdSJiong Wang if (meta->ptr.id == range_ptr_id && 429587b10ecdSJiong Wang meta->ptr.off == range_ptr_off) { 429687b10ecdSJiong Wang s16 new_start = range_start; 429787b10ecdSJiong Wang s16 end, off = insn->off; 429887b10ecdSJiong Wang s16 new_end = range_end; 429987b10ecdSJiong Wang bool changed = false; 430087b10ecdSJiong Wang 430187b10ecdSJiong Wang if (off < range_start) { 430287b10ecdSJiong Wang new_start = off; 430387b10ecdSJiong Wang changed = true; 430487b10ecdSJiong Wang } 430587b10ecdSJiong Wang 430687b10ecdSJiong Wang end = off + BPF_LDST_BYTES(insn); 430787b10ecdSJiong Wang if (end > range_end) { 430887b10ecdSJiong Wang new_end = end; 430987b10ecdSJiong Wang changed = true; 431087b10ecdSJiong Wang } 431187b10ecdSJiong Wang 431287b10ecdSJiong Wang if (!changed) 431387b10ecdSJiong Wang continue; 431487b10ecdSJiong Wang 431587b10ecdSJiong Wang if (new_end - new_start <= 64) { 431687b10ecdSJiong Wang /* Install new range. */ 431787b10ecdSJiong Wang range_start = new_start; 431887b10ecdSJiong Wang range_end = new_end; 431987b10ecdSJiong Wang continue; 432087b10ecdSJiong Wang } 432187b10ecdSJiong Wang } 432287b10ecdSJiong Wang 432387b10ecdSJiong Wang end_current_then_start_new: 432487b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 432587b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 432687b10ecdSJiong Wang start_new: 432787b10ecdSJiong Wang range_node = meta; 432887b10ecdSJiong Wang range_node->pkt_cache.do_init = true; 432987b10ecdSJiong Wang range_ptr_id = range_node->ptr.id; 433087b10ecdSJiong Wang range_ptr_off = range_node->ptr.off; 433187b10ecdSJiong Wang range_start = insn->off; 433287b10ecdSJiong Wang range_end = insn->off + BPF_LDST_BYTES(insn); 433387b10ecdSJiong Wang } 433487b10ecdSJiong Wang 433587b10ecdSJiong Wang if (range_node) { 433687b10ecdSJiong Wang range_node->pkt_cache.range_start = range_start; 433787b10ecdSJiong Wang range_node->pkt_cache.range_end = range_end; 433887b10ecdSJiong Wang } 433987b10ecdSJiong Wang 434087b10ecdSJiong Wang list_for_each_entry(meta, &nfp_prog->insns, l) { 434191a87a58SJakub Kicinski if (meta->flags & FLAG_INSN_SKIP_MASK) 434287b10ecdSJiong Wang continue; 434387b10ecdSJiong Wang 434487b10ecdSJiong Wang if (is_mbpf_load_pkt(meta) && !meta->ldst_gather_len) { 434587b10ecdSJiong Wang if (meta->pkt_cache.do_init) { 434687b10ecdSJiong Wang range_start = meta->pkt_cache.range_start; 434787b10ecdSJiong Wang range_end = meta->pkt_cache.range_end; 434887b10ecdSJiong Wang } else { 434987b10ecdSJiong Wang meta->pkt_cache.range_start = range_start; 435087b10ecdSJiong Wang meta->pkt_cache.range_end = range_end; 435187b10ecdSJiong Wang } 435287b10ecdSJiong Wang } 435387b10ecdSJiong Wang } 435487b10ecdSJiong Wang } 435587b10ecdSJiong Wang 4356d9ae7f2bSJakub Kicinski static int nfp_bpf_optimize(struct nfp_prog *nfp_prog) 4357d9ae7f2bSJakub Kicinski { 4358d9ae7f2bSJakub Kicinski nfp_bpf_opt_reg_init(nfp_prog); 4359d9ae7f2bSJakub Kicinski 43606c59500cSJakub Kicinski nfp_bpf_opt_neg_add_sub(nfp_prog); 4361d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_mask(nfp_prog); 4362d9ae7f2bSJakub Kicinski nfp_bpf_opt_ld_shift(nfp_prog); 43636bc7103cSJiong Wang nfp_bpf_opt_ldst_gather(nfp_prog); 436487b10ecdSJiong Wang nfp_bpf_opt_pkt_cache(nfp_prog); 4365d9ae7f2bSJakub Kicinski 4366d9ae7f2bSJakub Kicinski return 0; 4367d9ae7f2bSJakub Kicinski } 4368d9ae7f2bSJakub Kicinski 4369b4264c96SJakub Kicinski static int nfp_bpf_replace_map_ptrs(struct nfp_prog *nfp_prog) 4370b4264c96SJakub Kicinski { 4371b4264c96SJakub Kicinski struct nfp_insn_meta *meta1, *meta2; 4372b4264c96SJakub Kicinski struct nfp_bpf_map *nfp_map; 4373b4264c96SJakub Kicinski struct bpf_map *map; 4374ab01f4acSJakub Kicinski u32 id; 4375b4264c96SJakub Kicinski 4376b4264c96SJakub Kicinski nfp_for_each_insn_walk2(nfp_prog, meta1, meta2) { 437791a87a58SJakub Kicinski if (meta1->flags & FLAG_INSN_SKIP_MASK || 437891a87a58SJakub Kicinski meta2->flags & FLAG_INSN_SKIP_MASK) 4379b4264c96SJakub Kicinski continue; 4380b4264c96SJakub Kicinski 4381b4264c96SJakub Kicinski if (meta1->insn.code != (BPF_LD | BPF_IMM | BPF_DW) || 4382b4264c96SJakub Kicinski meta1->insn.src_reg != BPF_PSEUDO_MAP_FD) 4383b4264c96SJakub Kicinski continue; 4384b4264c96SJakub Kicinski 4385b4264c96SJakub Kicinski map = (void *)(unsigned long)((u32)meta1->insn.imm | 4386b4264c96SJakub Kicinski (u64)meta2->insn.imm << 32); 4387ab01f4acSJakub Kicinski if (bpf_map_offload_neutral(map)) { 4388ab01f4acSJakub Kicinski id = map->id; 4389ab01f4acSJakub Kicinski } else { 4390b4264c96SJakub Kicinski nfp_map = map_to_offmap(map)->dev_priv; 4391ab01f4acSJakub Kicinski id = nfp_map->tid; 4392ab01f4acSJakub Kicinski } 4393b4264c96SJakub Kicinski 4394ab01f4acSJakub Kicinski meta1->insn.imm = id; 4395b4264c96SJakub Kicinski meta2->insn.imm = 0; 4396b4264c96SJakub Kicinski } 4397b4264c96SJakub Kicinski 4398b4264c96SJakub Kicinski return 0; 4399b4264c96SJakub Kicinski } 4400b4264c96SJakub Kicinski 44012314fe9eSJakub Kicinski static int nfp_bpf_ustore_calc(u64 *prog, unsigned int len) 4402fd068ddcSJakub Kicinski { 44032314fe9eSJakub Kicinski __le64 *ustore = (__force __le64 *)prog; 4404fd068ddcSJakub Kicinski int i; 4405fd068ddcSJakub Kicinski 44062314fe9eSJakub Kicinski for (i = 0; i < len; i++) { 4407fd068ddcSJakub Kicinski int err; 4408fd068ddcSJakub Kicinski 44092314fe9eSJakub Kicinski err = nfp_ustore_check_valid_no_ecc(prog[i]); 4410fd068ddcSJakub Kicinski if (err) 4411fd068ddcSJakub Kicinski return err; 4412fd068ddcSJakub Kicinski 44132314fe9eSJakub Kicinski ustore[i] = cpu_to_le64(nfp_ustore_calc_ecc_insn(prog[i])); 4414fd068ddcSJakub Kicinski } 4415fd068ddcSJakub Kicinski 4416fd068ddcSJakub Kicinski return 0; 4417fd068ddcSJakub Kicinski } 4418fd068ddcSJakub Kicinski 441944a12eccSJakub Kicinski static void nfp_bpf_prog_trim(struct nfp_prog *nfp_prog) 442044a12eccSJakub Kicinski { 442144a12eccSJakub Kicinski void *prog; 442244a12eccSJakub Kicinski 442344a12eccSJakub Kicinski prog = kvmalloc_array(nfp_prog->prog_len, sizeof(u64), GFP_KERNEL); 442444a12eccSJakub Kicinski if (!prog) 442544a12eccSJakub Kicinski return; 442644a12eccSJakub Kicinski 442744a12eccSJakub Kicinski nfp_prog->__prog_alloc_len = nfp_prog->prog_len * sizeof(u64); 442844a12eccSJakub Kicinski memcpy(prog, nfp_prog->prog, nfp_prog->__prog_alloc_len); 442944a12eccSJakub Kicinski kvfree(nfp_prog->prog); 443044a12eccSJakub Kicinski nfp_prog->prog = prog; 443144a12eccSJakub Kicinski } 443244a12eccSJakub Kicinski 4433c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *nfp_prog) 4434d9ae7f2bSJakub Kicinski { 4435d9ae7f2bSJakub Kicinski int ret; 4436d9ae7f2bSJakub Kicinski 4437b4264c96SJakub Kicinski ret = nfp_bpf_replace_map_ptrs(nfp_prog); 4438b4264c96SJakub Kicinski if (ret) 4439b4264c96SJakub Kicinski return ret; 4440b4264c96SJakub Kicinski 4441d9ae7f2bSJakub Kicinski ret = nfp_bpf_optimize(nfp_prog); 4442d9ae7f2bSJakub Kicinski if (ret) 44439314c442SJakub Kicinski return ret; 4444d9ae7f2bSJakub Kicinski 4445d9ae7f2bSJakub Kicinski ret = nfp_translate(nfp_prog); 4446d9ae7f2bSJakub Kicinski if (ret) { 4447d9ae7f2bSJakub Kicinski pr_err("Translation failed with error %d (translated: %u)\n", 4448d9ae7f2bSJakub Kicinski ret, nfp_prog->n_translated); 44499314c442SJakub Kicinski return -EINVAL; 4450d9ae7f2bSJakub Kicinski } 4451d9ae7f2bSJakub Kicinski 445244a12eccSJakub Kicinski nfp_bpf_prog_trim(nfp_prog); 445344a12eccSJakub Kicinski 44542314fe9eSJakub Kicinski return ret; 4455d9ae7f2bSJakub Kicinski } 44561549921dSJakub Kicinski 4457e2fc6114SJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog) 44581549921dSJakub Kicinski { 44591549921dSJakub Kicinski struct nfp_insn_meta *meta; 44601549921dSJakub Kicinski 44611549921dSJakub Kicinski /* Another pass to record jump information. */ 44621549921dSJakub Kicinski list_for_each_entry(meta, &nfp_prog->insns, l) { 44631549921dSJakub Kicinski struct nfp_insn_meta *dst_meta; 4464e3b49dc6SQuentin Monnet u64 code = meta->insn.code; 4465e3b49dc6SQuentin Monnet unsigned int dst_idx; 4466e3b49dc6SQuentin Monnet bool pseudo_call; 44671549921dSJakub Kicinski 446846144839SJiong Wang if (!is_mbpf_jmp(meta)) 4469e3b49dc6SQuentin Monnet continue; 4470e3b49dc6SQuentin Monnet if (BPF_OP(code) == BPF_EXIT) 4471e3b49dc6SQuentin Monnet continue; 4472e3b49dc6SQuentin Monnet if (is_mbpf_helper_call(meta)) 4473e3b49dc6SQuentin Monnet continue; 44741549921dSJakub Kicinski 4475e3b49dc6SQuentin Monnet /* If opcode is BPF_CALL at this point, this can only be a 4476e3b49dc6SQuentin Monnet * BPF-to-BPF call (a.k.a pseudo call). 4477e3b49dc6SQuentin Monnet */ 4478e3b49dc6SQuentin Monnet pseudo_call = BPF_OP(code) == BPF_CALL; 4479e3b49dc6SQuentin Monnet 4480e3b49dc6SQuentin Monnet if (pseudo_call) 4481e3b49dc6SQuentin Monnet dst_idx = meta->n + 1 + meta->insn.imm; 4482e3b49dc6SQuentin Monnet else 4483e3b49dc6SQuentin Monnet dst_idx = meta->n + 1 + meta->insn.off; 4484e3b49dc6SQuentin Monnet 4485e2fc6114SJakub Kicinski dst_meta = nfp_bpf_goto_meta(nfp_prog, meta, dst_idx); 4486e3b49dc6SQuentin Monnet 4487e3b49dc6SQuentin Monnet if (pseudo_call) 4488e3b49dc6SQuentin Monnet dst_meta->flags |= FLAG_INSN_IS_SUBPROG_START; 4489e3b49dc6SQuentin Monnet 44901549921dSJakub Kicinski dst_meta->flags |= FLAG_INSN_IS_JUMP_DST; 4491e3b49dc6SQuentin Monnet meta->jmp_dst = dst_meta; 44921549921dSJakub Kicinski } 44931549921dSJakub Kicinski } 44942314fe9eSJakub Kicinski 449574801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code) 449674801e50SQuentin Monnet { 449774801e50SQuentin Monnet return !!instr_cb[code]; 449874801e50SQuentin Monnet } 449974801e50SQuentin Monnet 45002314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) 45012314fe9eSJakub Kicinski { 45022314fe9eSJakub Kicinski unsigned int i; 45032314fe9eSJakub Kicinski u64 *prog; 45042314fe9eSJakub Kicinski int err; 45052314fe9eSJakub Kicinski 45062314fe9eSJakub Kicinski prog = kmemdup(nfp_prog->prog, nfp_prog->prog_len * sizeof(u64), 45072314fe9eSJakub Kicinski GFP_KERNEL); 45082314fe9eSJakub Kicinski if (!prog) 45092314fe9eSJakub Kicinski return ERR_PTR(-ENOMEM); 45102314fe9eSJakub Kicinski 45112314fe9eSJakub Kicinski for (i = 0; i < nfp_prog->prog_len; i++) { 45122314fe9eSJakub Kicinski enum nfp_relo_type special; 451377a3d311SJakub Kicinski u32 val; 4514389f263bSQuentin Monnet u16 off; 45152314fe9eSJakub Kicinski 45162314fe9eSJakub Kicinski special = FIELD_GET(OP_RELO_TYPE, prog[i]); 45172314fe9eSJakub Kicinski switch (special) { 45182314fe9eSJakub Kicinski case RELO_NONE: 45192314fe9eSJakub Kicinski continue; 45202314fe9eSJakub Kicinski case RELO_BR_REL: 45212314fe9eSJakub Kicinski br_add_offset(&prog[i], bv->start_off); 45222314fe9eSJakub Kicinski break; 45232314fe9eSJakub Kicinski case RELO_BR_GO_OUT: 45242314fe9eSJakub Kicinski br_set_offset(&prog[i], 45252314fe9eSJakub Kicinski nfp_prog->tgt_out + bv->start_off); 45262314fe9eSJakub Kicinski break; 45272314fe9eSJakub Kicinski case RELO_BR_GO_ABORT: 45282314fe9eSJakub Kicinski br_set_offset(&prog[i], 45292314fe9eSJakub Kicinski nfp_prog->tgt_abort + bv->start_off); 45302314fe9eSJakub Kicinski break; 4531389f263bSQuentin Monnet case RELO_BR_GO_CALL_PUSH_REGS: 453244549623SQuentin Monnet if (!nfp_prog->tgt_call_push_regs) { 453344549623SQuentin Monnet pr_err("BUG: failed to detect subprogram registers needs\n"); 453444549623SQuentin Monnet err = -EINVAL; 453544549623SQuentin Monnet goto err_free_prog; 453644549623SQuentin Monnet } 4537389f263bSQuentin Monnet off = nfp_prog->tgt_call_push_regs + bv->start_off; 4538389f263bSQuentin Monnet br_set_offset(&prog[i], off); 4539389f263bSQuentin Monnet break; 4540389f263bSQuentin Monnet case RELO_BR_GO_CALL_POP_REGS: 454144549623SQuentin Monnet if (!nfp_prog->tgt_call_pop_regs) { 454244549623SQuentin Monnet pr_err("BUG: failed to detect subprogram registers needs\n"); 454344549623SQuentin Monnet err = -EINVAL; 454444549623SQuentin Monnet goto err_free_prog; 454544549623SQuentin Monnet } 4546389f263bSQuentin Monnet off = nfp_prog->tgt_call_pop_regs + bv->start_off; 4547389f263bSQuentin Monnet br_set_offset(&prog[i], off); 4548389f263bSQuentin Monnet break; 45492314fe9eSJakub Kicinski case RELO_BR_NEXT_PKT: 45502314fe9eSJakub Kicinski br_set_offset(&prog[i], bv->tgt_done); 45512314fe9eSJakub Kicinski break; 455277a3d311SJakub Kicinski case RELO_BR_HELPER: 455377a3d311SJakub Kicinski val = br_get_offset(prog[i]); 455477a3d311SJakub Kicinski val -= BR_OFF_RELO; 455577a3d311SJakub Kicinski switch (val) { 455677a3d311SJakub Kicinski case BPF_FUNC_map_lookup_elem: 455777a3d311SJakub Kicinski val = nfp_prog->bpf->helpers.map_lookup; 455877a3d311SJakub Kicinski break; 455944d65a47SJakub Kicinski case BPF_FUNC_map_update_elem: 456044d65a47SJakub Kicinski val = nfp_prog->bpf->helpers.map_update; 456144d65a47SJakub Kicinski break; 4562bfee64deSJakub Kicinski case BPF_FUNC_map_delete_elem: 4563bfee64deSJakub Kicinski val = nfp_prog->bpf->helpers.map_delete; 4564bfee64deSJakub Kicinski break; 45659816dd35SJakub Kicinski case BPF_FUNC_perf_event_output: 45669816dd35SJakub Kicinski val = nfp_prog->bpf->helpers.perf_event_output; 45679816dd35SJakub Kicinski break; 456877a3d311SJakub Kicinski default: 456977a3d311SJakub Kicinski pr_err("relocation of unknown helper %d\n", 457077a3d311SJakub Kicinski val); 457177a3d311SJakub Kicinski err = -EINVAL; 457277a3d311SJakub Kicinski goto err_free_prog; 457377a3d311SJakub Kicinski } 457477a3d311SJakub Kicinski br_set_offset(&prog[i], val); 457577a3d311SJakub Kicinski break; 457677a3d311SJakub Kicinski case RELO_IMMED_REL: 457777a3d311SJakub Kicinski immed_add_value(&prog[i], bv->start_off); 457877a3d311SJakub Kicinski break; 45792314fe9eSJakub Kicinski } 45802314fe9eSJakub Kicinski 45812314fe9eSJakub Kicinski prog[i] &= ~OP_RELO_TYPE; 45822314fe9eSJakub Kicinski } 45832314fe9eSJakub Kicinski 45842314fe9eSJakub Kicinski err = nfp_bpf_ustore_calc(prog, nfp_prog->prog_len); 45852314fe9eSJakub Kicinski if (err) 45862314fe9eSJakub Kicinski goto err_free_prog; 45872314fe9eSJakub Kicinski 45882314fe9eSJakub Kicinski return prog; 45892314fe9eSJakub Kicinski 45902314fe9eSJakub Kicinski err_free_prog: 45912314fe9eSJakub Kicinski kfree(prog); 45922314fe9eSJakub Kicinski return ERR_PTR(err); 45932314fe9eSJakub Kicinski } 4594