1d9ae7f2bSJakub Kicinski /* 2d9ae7f2bSJakub Kicinski * Copyright (C) 2016 Netronome Systems, Inc. 3d9ae7f2bSJakub Kicinski * 4d9ae7f2bSJakub Kicinski * This software is dual licensed under the GNU General License Version 2, 5d9ae7f2bSJakub Kicinski * June 1991 as shown in the file COPYING in the top-level directory of this 6d9ae7f2bSJakub Kicinski * source tree or the BSD 2-Clause License provided below. You have the 7d9ae7f2bSJakub Kicinski * option to license this software under the complete terms of either license. 8d9ae7f2bSJakub Kicinski * 9d9ae7f2bSJakub Kicinski * The BSD 2-Clause License: 10d9ae7f2bSJakub Kicinski * 11d9ae7f2bSJakub Kicinski * Redistribution and use in source and binary forms, with or 12d9ae7f2bSJakub Kicinski * without modification, are permitted provided that the following 13d9ae7f2bSJakub Kicinski * conditions are met: 14d9ae7f2bSJakub Kicinski * 15d9ae7f2bSJakub Kicinski * 1. Redistributions of source code must retain the above 16d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 17d9ae7f2bSJakub Kicinski * disclaimer. 18d9ae7f2bSJakub Kicinski * 19d9ae7f2bSJakub Kicinski * 2. Redistributions in binary form must reproduce the above 20d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 21d9ae7f2bSJakub Kicinski * disclaimer in the documentation and/or other materials 22d9ae7f2bSJakub Kicinski * provided with the distribution. 23d9ae7f2bSJakub Kicinski * 24d9ae7f2bSJakub Kicinski * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25d9ae7f2bSJakub Kicinski * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26d9ae7f2bSJakub Kicinski * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27d9ae7f2bSJakub Kicinski * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28d9ae7f2bSJakub Kicinski * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29d9ae7f2bSJakub Kicinski * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30d9ae7f2bSJakub Kicinski * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31d9ae7f2bSJakub Kicinski * SOFTWARE. 32d9ae7f2bSJakub Kicinski */ 33d9ae7f2bSJakub Kicinski 34d9ae7f2bSJakub Kicinski #ifndef __NFP_BPF_H__ 35d9ae7f2bSJakub Kicinski #define __NFP_BPF_H__ 1 36d9ae7f2bSJakub Kicinski 37d9ae7f2bSJakub Kicinski #include <linux/bitfield.h> 38d9ae7f2bSJakub Kicinski #include <linux/bpf.h> 392ca71441SJakub Kicinski #include <linux/bpf_verifier.h> 40d9ae7f2bSJakub Kicinski #include <linux/list.h> 41d9ae7f2bSJakub Kicinski #include <linux/types.h> 42d9ae7f2bSJakub Kicinski 43b3f868dfSJakub Kicinski #include "../nfp_asm.h" 44c66a9cf4SJakub Kicinski #include "../nfp_net.h" 45c66a9cf4SJakub Kicinski 46d9ae7f2bSJakub Kicinski /* For branch fixup logic use up-most byte of branch instruction as scratch 47d9ae7f2bSJakub Kicinski * area. Remember to clear this before sending instructions to HW! 48d9ae7f2bSJakub Kicinski */ 49d9ae7f2bSJakub Kicinski #define OP_BR_SPECIAL 0xff00000000000000ULL 50d9ae7f2bSJakub Kicinski 51d9ae7f2bSJakub Kicinski enum br_special { 52d9ae7f2bSJakub Kicinski OP_BR_NORMAL = 0, 53d9ae7f2bSJakub Kicinski OP_BR_GO_OUT, 54d9ae7f2bSJakub Kicinski OP_BR_GO_ABORT, 55d9ae7f2bSJakub Kicinski }; 56d9ae7f2bSJakub Kicinski 57d9ae7f2bSJakub Kicinski enum static_regs { 5818e53b6cSJakub Kicinski STATIC_REG_IMM = 21, /* Bank AB */ 59d3488480SJakub Kicinski STATIC_REG_STACK = 22, /* Bank A */ 6018e53b6cSJakub Kicinski STATIC_REG_PKT_LEN = 22, /* Bank B */ 6118e53b6cSJakub Kicinski }; 6218e53b6cSJakub Kicinski 6318e53b6cSJakub Kicinski enum pkt_vec { 6418e53b6cSJakub Kicinski PKT_VEC_PKT_LEN = 0, 6518e53b6cSJakub Kicinski PKT_VEC_PKT_PTR = 2, 66d9ae7f2bSJakub Kicinski }; 67d9ae7f2bSJakub Kicinski 68d9ae7f2bSJakub Kicinski enum nfp_bpf_action_type { 69d9ae7f2bSJakub Kicinski NN_ACT_TC_DROP, 70d9ae7f2bSJakub Kicinski NN_ACT_TC_REDIR, 71d9ae7f2bSJakub Kicinski NN_ACT_DIRECT, 72d9ae7f2bSJakub Kicinski NN_ACT_XDP, 73d9ae7f2bSJakub Kicinski }; 74d9ae7f2bSJakub Kicinski 7518e53b6cSJakub Kicinski #define pv_len(np) reg_lm(1, PKT_VEC_PKT_LEN) 7618e53b6cSJakub Kicinski #define pv_ctm_ptr(np) reg_lm(1, PKT_VEC_PKT_PTR) 7718e53b6cSJakub Kicinski 78d3488480SJakub Kicinski #define stack_reg(np) reg_a(STATIC_REG_STACK) 79d3488480SJakub Kicinski #define stack_imm(np) imm_b(np) 8018e53b6cSJakub Kicinski #define plen_reg(np) reg_b(STATIC_REG_PKT_LEN) 8118e53b6cSJakub Kicinski #define pptr_reg(np) pv_ctm_ptr(np) 8218e53b6cSJakub Kicinski #define imm_a(np) reg_a(STATIC_REG_IMM) 8318e53b6cSJakub Kicinski #define imm_b(np) reg_b(STATIC_REG_IMM) 8418e53b6cSJakub Kicinski #define imm_both(np) reg_both(STATIC_REG_IMM) 85d9ae7f2bSJakub Kicinski 86509144e2SJakub Kicinski #define NFP_BPF_ABI_FLAGS reg_imm(0) 87d9ae7f2bSJakub Kicinski #define NFP_BPF_ABI_FLAG_MARK 1 88d9ae7f2bSJakub Kicinski 89d9ae7f2bSJakub Kicinski struct nfp_prog; 90d9ae7f2bSJakub Kicinski struct nfp_insn_meta; 91d9ae7f2bSJakub Kicinski typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); 92d9ae7f2bSJakub Kicinski 93d9ae7f2bSJakub Kicinski #define nfp_prog_first_meta(nfp_prog) \ 94d9ae7f2bSJakub Kicinski list_first_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 95d9ae7f2bSJakub Kicinski #define nfp_prog_last_meta(nfp_prog) \ 96d9ae7f2bSJakub Kicinski list_last_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 97d9ae7f2bSJakub Kicinski #define nfp_meta_next(meta) list_next_entry(meta, l) 98d9ae7f2bSJakub Kicinski #define nfp_meta_prev(meta) list_prev_entry(meta, l) 99d9ae7f2bSJakub Kicinski 100d9ae7f2bSJakub Kicinski /** 101d9ae7f2bSJakub Kicinski * struct nfp_insn_meta - BPF instruction wrapper 102d9ae7f2bSJakub Kicinski * @insn: BPF instruction 1032ca71441SJakub Kicinski * @ptr: pointer type for memory operations 104d9ae7f2bSJakub Kicinski * @off: index of first generated machine instruction (in nfp_prog.prog) 105d9ae7f2bSJakub Kicinski * @n: eBPF instruction number 106d9ae7f2bSJakub Kicinski * @skip: skip this instruction (optimized out) 107d9ae7f2bSJakub Kicinski * @double_cb: callback for second part of the instruction 108d9ae7f2bSJakub Kicinski * @l: link on nfp_prog->insns list 109d9ae7f2bSJakub Kicinski */ 110d9ae7f2bSJakub Kicinski struct nfp_insn_meta { 111d9ae7f2bSJakub Kicinski struct bpf_insn insn; 1122ca71441SJakub Kicinski struct bpf_reg_state ptr; 113d9ae7f2bSJakub Kicinski unsigned int off; 114d9ae7f2bSJakub Kicinski unsigned short n; 115d9ae7f2bSJakub Kicinski bool skip; 116d9ae7f2bSJakub Kicinski instr_cb_t double_cb; 117d9ae7f2bSJakub Kicinski 118d9ae7f2bSJakub Kicinski struct list_head l; 119d9ae7f2bSJakub Kicinski }; 120d9ae7f2bSJakub Kicinski 121d9ae7f2bSJakub Kicinski #define BPF_SIZE_MASK 0x18 122d9ae7f2bSJakub Kicinski 123d9ae7f2bSJakub Kicinski static inline u8 mbpf_class(const struct nfp_insn_meta *meta) 124d9ae7f2bSJakub Kicinski { 125d9ae7f2bSJakub Kicinski return BPF_CLASS(meta->insn.code); 126d9ae7f2bSJakub Kicinski } 127d9ae7f2bSJakub Kicinski 128d9ae7f2bSJakub Kicinski static inline u8 mbpf_src(const struct nfp_insn_meta *meta) 129d9ae7f2bSJakub Kicinski { 130d9ae7f2bSJakub Kicinski return BPF_SRC(meta->insn.code); 131d9ae7f2bSJakub Kicinski } 132d9ae7f2bSJakub Kicinski 133d9ae7f2bSJakub Kicinski static inline u8 mbpf_op(const struct nfp_insn_meta *meta) 134d9ae7f2bSJakub Kicinski { 135d9ae7f2bSJakub Kicinski return BPF_OP(meta->insn.code); 136d9ae7f2bSJakub Kicinski } 137d9ae7f2bSJakub Kicinski 138d9ae7f2bSJakub Kicinski static inline u8 mbpf_mode(const struct nfp_insn_meta *meta) 139d9ae7f2bSJakub Kicinski { 140d9ae7f2bSJakub Kicinski return BPF_MODE(meta->insn.code); 141d9ae7f2bSJakub Kicinski } 142d9ae7f2bSJakub Kicinski 143d9ae7f2bSJakub Kicinski /** 144d9ae7f2bSJakub Kicinski * struct nfp_prog - nfp BPF program 145d9ae7f2bSJakub Kicinski * @prog: machine code 146d9ae7f2bSJakub Kicinski * @prog_len: number of valid instructions in @prog array 147d9ae7f2bSJakub Kicinski * @__prog_alloc_len: alloc size of @prog array 148d9ae7f2bSJakub Kicinski * @act: BPF program/action type (TC DA, TC with action, XDP etc.) 149d9ae7f2bSJakub Kicinski * @num_regs: number of registers used by this program 150d9ae7f2bSJakub Kicinski * @regs_per_thread: number of basic registers allocated per thread 151d9ae7f2bSJakub Kicinski * @start_off: address of the first instruction in the memory 152d9ae7f2bSJakub Kicinski * @tgt_out: jump target for normal exit 153d9ae7f2bSJakub Kicinski * @tgt_abort: jump target for abort (e.g. access outside of packet buffer) 154d9ae7f2bSJakub Kicinski * @tgt_done: jump target to get the next packet 155d9ae7f2bSJakub Kicinski * @n_translated: number of successfully translated instructions (for errors) 156d9ae7f2bSJakub Kicinski * @error: error code if something went wrong 157ee9133a8SJakub Kicinski * @stack_depth: max stack depth from the verifier 158d9ae7f2bSJakub Kicinski * @insns: list of BPF instruction wrappers (struct nfp_insn_meta) 159d9ae7f2bSJakub Kicinski */ 160d9ae7f2bSJakub Kicinski struct nfp_prog { 161d9ae7f2bSJakub Kicinski u64 *prog; 162d9ae7f2bSJakub Kicinski unsigned int prog_len; 163d9ae7f2bSJakub Kicinski unsigned int __prog_alloc_len; 164d9ae7f2bSJakub Kicinski 165d9ae7f2bSJakub Kicinski enum nfp_bpf_action_type act; 166d9ae7f2bSJakub Kicinski 167d9ae7f2bSJakub Kicinski unsigned int num_regs; 168d9ae7f2bSJakub Kicinski unsigned int regs_per_thread; 169d9ae7f2bSJakub Kicinski 170d9ae7f2bSJakub Kicinski unsigned int start_off; 171d9ae7f2bSJakub Kicinski unsigned int tgt_out; 172d9ae7f2bSJakub Kicinski unsigned int tgt_abort; 173d9ae7f2bSJakub Kicinski unsigned int tgt_done; 174d9ae7f2bSJakub Kicinski 175d9ae7f2bSJakub Kicinski unsigned int n_translated; 176d9ae7f2bSJakub Kicinski int error; 177d9ae7f2bSJakub Kicinski 178ee9133a8SJakub Kicinski unsigned int stack_depth; 179ee9133a8SJakub Kicinski 180d9ae7f2bSJakub Kicinski struct list_head insns; 181d9ae7f2bSJakub Kicinski }; 182d9ae7f2bSJakub Kicinski 183d9ae7f2bSJakub Kicinski struct nfp_bpf_result { 184d9ae7f2bSJakub Kicinski unsigned int n_instr; 185d9ae7f2bSJakub Kicinski bool dense_mode; 186d9ae7f2bSJakub Kicinski }; 187d9ae7f2bSJakub Kicinski 188d9ae7f2bSJakub Kicinski int 189d9ae7f2bSJakub Kicinski nfp_bpf_jit(struct bpf_prog *filter, void *prog, enum nfp_bpf_action_type act, 190d9ae7f2bSJakub Kicinski unsigned int prog_start, unsigned int prog_done, 191d9ae7f2bSJakub Kicinski unsigned int prog_sz, struct nfp_bpf_result *res); 192d9ae7f2bSJakub Kicinski 193d9ae7f2bSJakub Kicinski int nfp_prog_verify(struct nfp_prog *nfp_prog, struct bpf_prog *prog); 194d9ae7f2bSJakub Kicinski 195bb45e51cSJakub Kicinski struct nfp_net; 196bb45e51cSJakub Kicinski struct tc_cls_bpf_offload; 197bb45e51cSJakub Kicinski 198c66a9cf4SJakub Kicinski /** 199c66a9cf4SJakub Kicinski * struct nfp_net_bpf_priv - per-vNIC BPF private data 200c66a9cf4SJakub Kicinski * @rx_filter: Filter offload statistics - dropped packets/bytes 201c66a9cf4SJakub Kicinski * @rx_filter_prev: Filter offload statistics - values from previous update 202c66a9cf4SJakub Kicinski * @rx_filter_change: Jiffies when statistics last changed 203c66a9cf4SJakub Kicinski * @rx_filter_stats_timer: Timer for polling filter offload statistics 204c66a9cf4SJakub Kicinski * @rx_filter_lock: Lock protecting timer state changes (teardown) 205c66a9cf4SJakub Kicinski */ 206c66a9cf4SJakub Kicinski struct nfp_net_bpf_priv { 207c66a9cf4SJakub Kicinski struct nfp_stat_pair rx_filter, rx_filter_prev; 208c66a9cf4SJakub Kicinski unsigned long rx_filter_change; 209c66a9cf4SJakub Kicinski struct timer_list rx_filter_stats_timer; 210c66a9cf4SJakub Kicinski spinlock_t rx_filter_lock; 211c66a9cf4SJakub Kicinski }; 212c66a9cf4SJakub Kicinski 213bb45e51cSJakub Kicinski int nfp_net_bpf_offload(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf); 214c66a9cf4SJakub Kicinski void nfp_net_filter_stats_timer(unsigned long data); 215bb45e51cSJakub Kicinski 216d9ae7f2bSJakub Kicinski #endif 217