1d9ae7f2bSJakub Kicinski /* 2630a4d38SJakub Kicinski * Copyright (C) 2016-2018 Netronome Systems, Inc. 3d9ae7f2bSJakub Kicinski * 4d9ae7f2bSJakub Kicinski * This software is dual licensed under the GNU General License Version 2, 5d9ae7f2bSJakub Kicinski * June 1991 as shown in the file COPYING in the top-level directory of this 6d9ae7f2bSJakub Kicinski * source tree or the BSD 2-Clause License provided below. You have the 7d9ae7f2bSJakub Kicinski * option to license this software under the complete terms of either license. 8d9ae7f2bSJakub Kicinski * 9d9ae7f2bSJakub Kicinski * The BSD 2-Clause License: 10d9ae7f2bSJakub Kicinski * 11d9ae7f2bSJakub Kicinski * Redistribution and use in source and binary forms, with or 12d9ae7f2bSJakub Kicinski * without modification, are permitted provided that the following 13d9ae7f2bSJakub Kicinski * conditions are met: 14d9ae7f2bSJakub Kicinski * 15d9ae7f2bSJakub Kicinski * 1. Redistributions of source code must retain the above 16d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 17d9ae7f2bSJakub Kicinski * disclaimer. 18d9ae7f2bSJakub Kicinski * 19d9ae7f2bSJakub Kicinski * 2. Redistributions in binary form must reproduce the above 20d9ae7f2bSJakub Kicinski * copyright notice, this list of conditions and the following 21d9ae7f2bSJakub Kicinski * disclaimer in the documentation and/or other materials 22d9ae7f2bSJakub Kicinski * provided with the distribution. 23d9ae7f2bSJakub Kicinski * 24d9ae7f2bSJakub Kicinski * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25d9ae7f2bSJakub Kicinski * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26d9ae7f2bSJakub Kicinski * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27d9ae7f2bSJakub Kicinski * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28d9ae7f2bSJakub Kicinski * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29d9ae7f2bSJakub Kicinski * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30d9ae7f2bSJakub Kicinski * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31d9ae7f2bSJakub Kicinski * SOFTWARE. 32d9ae7f2bSJakub Kicinski */ 33d9ae7f2bSJakub Kicinski 34d9ae7f2bSJakub Kicinski #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> 40d48ae231SJakub Kicinski #include <linux/kernel.h> 41d9ae7f2bSJakub Kicinski #include <linux/list.h> 42630a4d38SJakub Kicinski #include <linux/rhashtable.h> 43d48ae231SJakub Kicinski #include <linux/skbuff.h> 44d9ae7f2bSJakub Kicinski #include <linux/types.h> 45d48ae231SJakub Kicinski #include <linux/wait.h> 46d9ae7f2bSJakub Kicinski 47b3f868dfSJakub Kicinski #include "../nfp_asm.h" 48d48ae231SJakub Kicinski #include "fw.h" 49c66a9cf4SJakub Kicinski 502314fe9eSJakub Kicinski /* For relocation logic use up-most byte of branch instruction as scratch 51d9ae7f2bSJakub Kicinski * area. Remember to clear this before sending instructions to HW! 52d9ae7f2bSJakub Kicinski */ 532314fe9eSJakub Kicinski #define OP_RELO_TYPE 0xff00000000000000ULL 54d9ae7f2bSJakub Kicinski 552314fe9eSJakub Kicinski enum nfp_relo_type { 562314fe9eSJakub Kicinski RELO_NONE = 0, 572314fe9eSJakub Kicinski /* standard internal jumps */ 582314fe9eSJakub Kicinski RELO_BR_REL, 592314fe9eSJakub Kicinski /* internal jumps to parts of the outro */ 602314fe9eSJakub Kicinski RELO_BR_GO_OUT, 612314fe9eSJakub Kicinski RELO_BR_GO_ABORT, 622314fe9eSJakub Kicinski /* external jumps to fixed addresses */ 632314fe9eSJakub Kicinski RELO_BR_NEXT_PKT, 6477a3d311SJakub Kicinski RELO_BR_HELPER, 6577a3d311SJakub Kicinski /* immediate relocation against load address */ 6677a3d311SJakub Kicinski RELO_IMMED_REL, 67d9ae7f2bSJakub Kicinski }; 68d9ae7f2bSJakub Kicinski 69e84797feSJakub Kicinski /* To make absolute relocated branches (branches other than RELO_BR_REL) 70e84797feSJakub Kicinski * distinguishable in user space dumps from normal jumps, add a large offset 71e84797feSJakub Kicinski * to them. 72e84797feSJakub Kicinski */ 73e84797feSJakub Kicinski #define BR_OFF_RELO 15000 74e84797feSJakub Kicinski 75d9ae7f2bSJakub Kicinski enum static_regs { 76dcb0c27fSJakub Kicinski STATIC_REG_IMMA = 20, /* Bank AB */ 7718e53b6cSJakub Kicinski STATIC_REG_IMM = 21, /* Bank AB */ 78d3488480SJakub Kicinski STATIC_REG_STACK = 22, /* Bank A */ 7918e53b6cSJakub Kicinski STATIC_REG_PKT_LEN = 22, /* Bank B */ 8018e53b6cSJakub Kicinski }; 8118e53b6cSJakub Kicinski 8218e53b6cSJakub Kicinski enum pkt_vec { 8318e53b6cSJakub Kicinski PKT_VEC_PKT_LEN = 0, 8418e53b6cSJakub Kicinski PKT_VEC_PKT_PTR = 2, 85d985888fSJakub Kicinski PKT_VEC_QSEL_SET = 4, 86d985888fSJakub Kicinski PKT_VEC_QSEL_VAL = 6, 87d9ae7f2bSJakub Kicinski }; 88d9ae7f2bSJakub Kicinski 89d985888fSJakub Kicinski #define PKT_VEL_QSEL_SET_BIT 4 90d985888fSJakub Kicinski 9118e53b6cSJakub Kicinski #define pv_len(np) reg_lm(1, PKT_VEC_PKT_LEN) 9218e53b6cSJakub Kicinski #define pv_ctm_ptr(np) reg_lm(1, PKT_VEC_PKT_PTR) 93d985888fSJakub Kicinski #define pv_qsel_set(np) reg_lm(1, PKT_VEC_QSEL_SET) 94d985888fSJakub Kicinski #define pv_qsel_val(np) reg_lm(1, PKT_VEC_QSEL_VAL) 9518e53b6cSJakub Kicinski 96d3488480SJakub Kicinski #define stack_reg(np) reg_a(STATIC_REG_STACK) 97d3488480SJakub Kicinski #define stack_imm(np) imm_b(np) 9818e53b6cSJakub Kicinski #define plen_reg(np) reg_b(STATIC_REG_PKT_LEN) 9918e53b6cSJakub Kicinski #define pptr_reg(np) pv_ctm_ptr(np) 10018e53b6cSJakub Kicinski #define imm_a(np) reg_a(STATIC_REG_IMM) 10118e53b6cSJakub Kicinski #define imm_b(np) reg_b(STATIC_REG_IMM) 102dcb0c27fSJakub Kicinski #define imma_a(np) reg_a(STATIC_REG_IMMA) 103dcb0c27fSJakub Kicinski #define imma_b(np) reg_b(STATIC_REG_IMMA) 10418e53b6cSJakub Kicinski #define imm_both(np) reg_both(STATIC_REG_IMM) 105d9ae7f2bSJakub Kicinski 106509144e2SJakub Kicinski #define NFP_BPF_ABI_FLAGS reg_imm(0) 107d9ae7f2bSJakub Kicinski #define NFP_BPF_ABI_FLAG_MARK 1 108d9ae7f2bSJakub Kicinski 10977a844eeSJakub Kicinski /** 11077a844eeSJakub Kicinski * struct nfp_app_bpf - bpf app priv structure 11177a844eeSJakub Kicinski * @app: backpointer to the app 1120d49eaf4SJakub Kicinski * 113d48ae231SJakub Kicinski * @tag_allocator: bitmap of control message tags in use 114d48ae231SJakub Kicinski * @tag_alloc_next: next tag bit to allocate 115d48ae231SJakub Kicinski * @tag_alloc_last: next tag bit to be freed 116d48ae231SJakub Kicinski * 117d48ae231SJakub Kicinski * @cmsg_replies: received cmsg replies waiting to be consumed 118d48ae231SJakub Kicinski * @cmsg_wq: work queue for waiting for cmsg replies 119d48ae231SJakub Kicinski * 1204da98eeaSJakub Kicinski * @map_list: list of offloaded maps 1211bba4c41SJakub Kicinski * @maps_in_use: number of currently offloaded maps 1221bba4c41SJakub Kicinski * @map_elems_in_use: number of elements allocated to offloaded maps 1234da98eeaSJakub Kicinski * 124630a4d38SJakub Kicinski * @maps_neutral: hash table of offload-neutral maps (on pointer) 125630a4d38SJakub Kicinski * 1260d49eaf4SJakub Kicinski * @adjust_head: adjust head capability 127703f578aSJakub Kicinski * @adjust_head.flags: extra flags for adjust head 128703f578aSJakub Kicinski * @adjust_head.off_min: minimal packet offset within buffer required 129703f578aSJakub Kicinski * @adjust_head.off_max: maximum packet offset within buffer required 130703f578aSJakub Kicinski * @adjust_head.guaranteed_sub: negative adjustment guaranteed possible 131703f578aSJakub Kicinski * @adjust_head.guaranteed_add: positive adjustment guaranteed possible 1329d080d5dSJakub Kicinski * 1339d080d5dSJakub Kicinski * @maps: map capability 134703f578aSJakub Kicinski * @maps.types: supported map types 135703f578aSJakub Kicinski * @maps.max_maps: max number of maps supported 136703f578aSJakub Kicinski * @maps.max_elems: max number of entries in each map 137703f578aSJakub Kicinski * @maps.max_key_sz: max size of map key 138703f578aSJakub Kicinski * @maps.max_val_sz: max size of map value 139703f578aSJakub Kicinski * @maps.max_elem_sz: max size of map entry (key + value) 1409d080d5dSJakub Kicinski * 1419d080d5dSJakub Kicinski * @helpers: helper addressess for various calls 142703f578aSJakub Kicinski * @helpers.map_lookup: map lookup helper address 14344d65a47SJakub Kicinski * @helpers.map_update: map update helper address 144bfee64deSJakub Kicinski * @helpers.map_delete: map delete helper address 1459816dd35SJakub Kicinski * @helpers.perf_event_output: output perf event to a ring buffer 146df4a37d8SJakub Kicinski * 147df4a37d8SJakub Kicinski * @pseudo_random: FW initialized the pseudo-random machinery (CSRs) 148d985888fSJakub Kicinski * @queue_select: BPF can set the RX queue ID in packet vector 14977a844eeSJakub Kicinski */ 15077a844eeSJakub Kicinski struct nfp_app_bpf { 15177a844eeSJakub Kicinski struct nfp_app *app; 1520d49eaf4SJakub Kicinski 153d48ae231SJakub Kicinski DECLARE_BITMAP(tag_allocator, U16_MAX + 1); 154d48ae231SJakub Kicinski u16 tag_alloc_next; 155d48ae231SJakub Kicinski u16 tag_alloc_last; 156d48ae231SJakub Kicinski 157d48ae231SJakub Kicinski struct sk_buff_head cmsg_replies; 158d48ae231SJakub Kicinski struct wait_queue_head cmsg_wq; 159d48ae231SJakub Kicinski 1604da98eeaSJakub Kicinski struct list_head map_list; 1611bba4c41SJakub Kicinski unsigned int maps_in_use; 1621bba4c41SJakub Kicinski unsigned int map_elems_in_use; 1634da98eeaSJakub Kicinski 164630a4d38SJakub Kicinski struct rhashtable maps_neutral; 165630a4d38SJakub Kicinski 1660d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head { 1670d49eaf4SJakub Kicinski u32 flags; 1680d49eaf4SJakub Kicinski int off_min; 1690d49eaf4SJakub Kicinski int off_max; 1708231f844SJakub Kicinski int guaranteed_sub; 1718231f844SJakub Kicinski int guaranteed_add; 1720d49eaf4SJakub Kicinski } adjust_head; 1739d080d5dSJakub Kicinski 1749d080d5dSJakub Kicinski struct { 1759d080d5dSJakub Kicinski u32 types; 1769d080d5dSJakub Kicinski u32 max_maps; 1779d080d5dSJakub Kicinski u32 max_elems; 1789d080d5dSJakub Kicinski u32 max_key_sz; 1799d080d5dSJakub Kicinski u32 max_val_sz; 1809d080d5dSJakub Kicinski u32 max_elem_sz; 1819d080d5dSJakub Kicinski } maps; 1829d080d5dSJakub Kicinski 1839d080d5dSJakub Kicinski struct { 1849d080d5dSJakub Kicinski u32 map_lookup; 18544d65a47SJakub Kicinski u32 map_update; 186bfee64deSJakub Kicinski u32 map_delete; 1879816dd35SJakub Kicinski u32 perf_event_output; 1889d080d5dSJakub Kicinski } helpers; 189df4a37d8SJakub Kicinski 190df4a37d8SJakub Kicinski bool pseudo_random; 191d985888fSJakub Kicinski bool queue_select; 19277a844eeSJakub Kicinski }; 19377a844eeSJakub Kicinski 194dcb0c27fSJakub Kicinski enum nfp_bpf_map_use { 195dcb0c27fSJakub Kicinski NFP_MAP_UNUSED = 0, 196dcb0c27fSJakub Kicinski NFP_MAP_USE_READ, 197dcb0c27fSJakub Kicinski NFP_MAP_USE_WRITE, 198dcb0c27fSJakub Kicinski NFP_MAP_USE_ATOMIC_CNT, 199dcb0c27fSJakub Kicinski }; 200dcb0c27fSJakub Kicinski 2014da98eeaSJakub Kicinski /** 2024da98eeaSJakub Kicinski * struct nfp_bpf_map - private per-map data attached to BPF maps for offload 2034da98eeaSJakub Kicinski * @offmap: pointer to the offloaded BPF map 2044da98eeaSJakub Kicinski * @bpf: back pointer to bpf app private structure 2054da98eeaSJakub Kicinski * @tid: table id identifying map on datapath 2064da98eeaSJakub Kicinski * @l: link on the nfp_app_bpf->map_list list 207dcb0c27fSJakub Kicinski * @use_map: map of how the value is used (in 4B chunks) 2084da98eeaSJakub Kicinski */ 2094da98eeaSJakub Kicinski struct nfp_bpf_map { 2104da98eeaSJakub Kicinski struct bpf_offloaded_map *offmap; 2114da98eeaSJakub Kicinski struct nfp_app_bpf *bpf; 2124da98eeaSJakub Kicinski u32 tid; 2134da98eeaSJakub Kicinski struct list_head l; 214dcb0c27fSJakub Kicinski enum nfp_bpf_map_use use_map[]; 2154da98eeaSJakub Kicinski }; 2164da98eeaSJakub Kicinski 217630a4d38SJakub Kicinski struct nfp_bpf_neutral_map { 218630a4d38SJakub Kicinski struct rhash_head l; 219630a4d38SJakub Kicinski struct bpf_map *ptr; 220630a4d38SJakub Kicinski u32 count; 221630a4d38SJakub Kicinski }; 222630a4d38SJakub Kicinski 223630a4d38SJakub Kicinski extern const struct rhashtable_params nfp_bpf_maps_neutral_params; 224630a4d38SJakub Kicinski 225d9ae7f2bSJakub Kicinski struct nfp_prog; 226d9ae7f2bSJakub Kicinski struct nfp_insn_meta; 227d9ae7f2bSJakub Kicinski typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); 228d9ae7f2bSJakub Kicinski 229d9ae7f2bSJakub Kicinski #define nfp_prog_first_meta(nfp_prog) \ 230d9ae7f2bSJakub Kicinski list_first_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 231d9ae7f2bSJakub Kicinski #define nfp_prog_last_meta(nfp_prog) \ 232d9ae7f2bSJakub Kicinski list_last_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 233d9ae7f2bSJakub Kicinski #define nfp_meta_next(meta) list_next_entry(meta, l) 234d9ae7f2bSJakub Kicinski #define nfp_meta_prev(meta) list_prev_entry(meta, l) 235d9ae7f2bSJakub Kicinski 2362f46e0c1SJakub Kicinski /** 2372f46e0c1SJakub Kicinski * struct nfp_bpf_reg_state - register state for calls 2382f46e0c1SJakub Kicinski * @reg: BPF register state from latest path 2392f46e0c1SJakub Kicinski * @var_off: for stack arg - changes stack offset on different paths 2402f46e0c1SJakub Kicinski */ 2412f46e0c1SJakub Kicinski struct nfp_bpf_reg_state { 2422f46e0c1SJakub Kicinski struct bpf_reg_state reg; 2432f46e0c1SJakub Kicinski bool var_off; 2442f46e0c1SJakub Kicinski }; 2452f46e0c1SJakub Kicinski 246a09d5c52SJiong Wang #define FLAG_INSN_IS_JUMP_DST BIT(0) 247a09d5c52SJiong Wang 248d9ae7f2bSJakub Kicinski /** 249d9ae7f2bSJakub Kicinski * struct nfp_insn_meta - BPF instruction wrapper 250d9ae7f2bSJakub Kicinski * @insn: BPF instruction 2512ca71441SJakub Kicinski * @ptr: pointer type for memory operations 2529879a381SJiong Wang * @ldst_gather_len: memcpy length gathered from load/store sequence 2539879a381SJiong Wang * @paired_st: the paired store insn at the head of the sequence 254b14157eeSJakub Kicinski * @ptr_not_const: pointer is not always constant 255be759237SJiong Wang * @pkt_cache: packet data cache information 256be759237SJiong Wang * @pkt_cache.range_start: start offset for associated packet data cache 257be759237SJiong Wang * @pkt_cache.range_end: end offset for associated packet data cache 258be759237SJiong Wang * @pkt_cache.do_init: this read needs to initialize packet data cache 25941aed09cSJakub Kicinski * @xadd_over_16bit: 16bit immediate is not guaranteed 26041aed09cSJakub Kicinski * @xadd_maybe_16bit: 16bit immediate is possible 2615b674140SJiong Wang * @jmp_dst: destination info for jump instructions 2627bdc97beSJakub Kicinski * @jump_neg_op: jump instruction has inverted immediate, use ADD instead of SUB 26377a3d311SJakub Kicinski * @func_id: function id for call instructions 26477a3d311SJakub Kicinski * @arg1: arg1 for call instructions 26577a3d311SJakub Kicinski * @arg2: arg2 for call instructions 266662c5472SJiong Wang * @umin_src: copy of core verifier umin_value for src opearnd. 267662c5472SJiong Wang * @umax_src: copy of core verifier umax_value for src operand. 268d9ae7f2bSJakub Kicinski * @off: index of first generated machine instruction (in nfp_prog.prog) 269d9ae7f2bSJakub Kicinski * @n: eBPF instruction number 270a09d5c52SJiong Wang * @flags: eBPF instruction extra optimization flags 271d9ae7f2bSJakub Kicinski * @skip: skip this instruction (optimized out) 272d9ae7f2bSJakub Kicinski * @double_cb: callback for second part of the instruction 273d9ae7f2bSJakub Kicinski * @l: link on nfp_prog->insns list 274d9ae7f2bSJakub Kicinski */ 275d9ae7f2bSJakub Kicinski struct nfp_insn_meta { 276d9ae7f2bSJakub Kicinski struct bpf_insn insn; 2775b674140SJiong Wang union { 27841aed09cSJakub Kicinski /* pointer ops (ld/st/xadd) */ 2795b674140SJiong Wang struct { 2802ca71441SJakub Kicinski struct bpf_reg_state ptr; 2819879a381SJiong Wang struct bpf_insn *paired_st; 2829879a381SJiong Wang s16 ldst_gather_len; 283b14157eeSJakub Kicinski bool ptr_not_const; 284be759237SJiong Wang struct { 285be759237SJiong Wang s16 range_start; 286be759237SJiong Wang s16 range_end; 287be759237SJiong Wang bool do_init; 288be759237SJiong Wang } pkt_cache; 28941aed09cSJakub Kicinski bool xadd_over_16bit; 29041aed09cSJakub Kicinski bool xadd_maybe_16bit; 2915b674140SJiong Wang }; 29241aed09cSJakub Kicinski /* jump */ 2937bdc97beSJakub Kicinski struct { 2945b674140SJiong Wang struct nfp_insn_meta *jmp_dst; 2957bdc97beSJakub Kicinski bool jump_neg_op; 2967bdc97beSJakub Kicinski }; 29741aed09cSJakub Kicinski /* function calls */ 29877a3d311SJakub Kicinski struct { 29977a3d311SJakub Kicinski u32 func_id; 30077a3d311SJakub Kicinski struct bpf_reg_state arg1; 3012f46e0c1SJakub Kicinski struct nfp_bpf_reg_state arg2; 30277a3d311SJakub Kicinski }; 303991f5b36SJiong Wang /* We are interested in range info for some operands, 304662c5472SJiong Wang * for example, the shift amount which is kept in src operand. 305991f5b36SJiong Wang */ 306991f5b36SJiong Wang struct { 307662c5472SJiong Wang u64 umin_src; 308662c5472SJiong Wang u64 umax_src; 309991f5b36SJiong Wang }; 3105b674140SJiong Wang }; 311d9ae7f2bSJakub Kicinski unsigned int off; 312d9ae7f2bSJakub Kicinski unsigned short n; 313a09d5c52SJiong Wang unsigned short flags; 314d9ae7f2bSJakub Kicinski bool skip; 315d9ae7f2bSJakub Kicinski instr_cb_t double_cb; 316d9ae7f2bSJakub Kicinski 317d9ae7f2bSJakub Kicinski struct list_head l; 318d9ae7f2bSJakub Kicinski }; 319d9ae7f2bSJakub Kicinski 320d9ae7f2bSJakub Kicinski #define BPF_SIZE_MASK 0x18 321d9ae7f2bSJakub Kicinski 322d9ae7f2bSJakub Kicinski static inline u8 mbpf_class(const struct nfp_insn_meta *meta) 323d9ae7f2bSJakub Kicinski { 324d9ae7f2bSJakub Kicinski return BPF_CLASS(meta->insn.code); 325d9ae7f2bSJakub Kicinski } 326d9ae7f2bSJakub Kicinski 327d9ae7f2bSJakub Kicinski static inline u8 mbpf_src(const struct nfp_insn_meta *meta) 328d9ae7f2bSJakub Kicinski { 329d9ae7f2bSJakub Kicinski return BPF_SRC(meta->insn.code); 330d9ae7f2bSJakub Kicinski } 331d9ae7f2bSJakub Kicinski 332d9ae7f2bSJakub Kicinski static inline u8 mbpf_op(const struct nfp_insn_meta *meta) 333d9ae7f2bSJakub Kicinski { 334d9ae7f2bSJakub Kicinski return BPF_OP(meta->insn.code); 335d9ae7f2bSJakub Kicinski } 336d9ae7f2bSJakub Kicinski 337d9ae7f2bSJakub Kicinski static inline u8 mbpf_mode(const struct nfp_insn_meta *meta) 338d9ae7f2bSJakub Kicinski { 339d9ae7f2bSJakub Kicinski return BPF_MODE(meta->insn.code); 340d9ae7f2bSJakub Kicinski } 341d9ae7f2bSJakub Kicinski 3425e4d6d20SJiong Wang static inline bool is_mbpf_load(const struct nfp_insn_meta *meta) 3435e4d6d20SJiong Wang { 3445e4d6d20SJiong Wang return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_LDX | BPF_MEM); 3455e4d6d20SJiong Wang } 3465e4d6d20SJiong Wang 3475e4d6d20SJiong Wang static inline bool is_mbpf_store(const struct nfp_insn_meta *meta) 3485e4d6d20SJiong Wang { 3495e4d6d20SJiong Wang return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_STX | BPF_MEM); 3505e4d6d20SJiong Wang } 3515e4d6d20SJiong Wang 35287b10ecdSJiong Wang static inline bool is_mbpf_load_pkt(const struct nfp_insn_meta *meta) 35387b10ecdSJiong Wang { 35487b10ecdSJiong Wang return is_mbpf_load(meta) && meta->ptr.type == PTR_TO_PACKET; 35587b10ecdSJiong Wang } 35687b10ecdSJiong Wang 35787b10ecdSJiong Wang static inline bool is_mbpf_store_pkt(const struct nfp_insn_meta *meta) 35887b10ecdSJiong Wang { 35987b10ecdSJiong Wang return is_mbpf_store(meta) && meta->ptr.type == PTR_TO_PACKET; 36087b10ecdSJiong Wang } 36187b10ecdSJiong Wang 36287b10ecdSJiong Wang static inline bool is_mbpf_classic_load(const struct nfp_insn_meta *meta) 36387b10ecdSJiong Wang { 36487b10ecdSJiong Wang u8 code = meta->insn.code; 36587b10ecdSJiong Wang 36687b10ecdSJiong Wang return BPF_CLASS(code) == BPF_LD && 36787b10ecdSJiong Wang (BPF_MODE(code) == BPF_ABS || BPF_MODE(code) == BPF_IND); 36887b10ecdSJiong Wang } 36987b10ecdSJiong Wang 37087b10ecdSJiong Wang static inline bool is_mbpf_classic_store(const struct nfp_insn_meta *meta) 37187b10ecdSJiong Wang { 37287b10ecdSJiong Wang u8 code = meta->insn.code; 37387b10ecdSJiong Wang 37487b10ecdSJiong Wang return BPF_CLASS(code) == BPF_ST && BPF_MODE(code) == BPF_MEM; 37587b10ecdSJiong Wang } 37687b10ecdSJiong Wang 37787b10ecdSJiong Wang static inline bool is_mbpf_classic_store_pkt(const struct nfp_insn_meta *meta) 37887b10ecdSJiong Wang { 37987b10ecdSJiong Wang return is_mbpf_classic_store(meta) && meta->ptr.type == PTR_TO_PACKET; 38087b10ecdSJiong Wang } 38187b10ecdSJiong Wang 382dcb0c27fSJakub Kicinski static inline bool is_mbpf_xadd(const struct nfp_insn_meta *meta) 383dcb0c27fSJakub Kicinski { 384dcb0c27fSJakub Kicinski return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_STX | BPF_XADD); 385dcb0c27fSJakub Kicinski } 386dcb0c27fSJakub Kicinski 387991f5b36SJiong Wang static inline bool is_mbpf_indir_shift(const struct nfp_insn_meta *meta) 388991f5b36SJiong Wang { 389991f5b36SJiong Wang u8 code = meta->insn.code; 390991f5b36SJiong Wang bool is_alu, is_shift; 391991f5b36SJiong Wang u8 opclass, opcode; 392991f5b36SJiong Wang 393991f5b36SJiong Wang opclass = BPF_CLASS(code); 394991f5b36SJiong Wang is_alu = opclass == BPF_ALU64 || opclass == BPF_ALU; 395991f5b36SJiong Wang if (!is_alu) 396991f5b36SJiong Wang return false; 397991f5b36SJiong Wang 398991f5b36SJiong Wang opcode = BPF_OP(code); 399991f5b36SJiong Wang is_shift = opcode == BPF_LSH || opcode == BPF_RSH || opcode == BPF_ARSH; 400991f5b36SJiong Wang if (!is_shift) 401991f5b36SJiong Wang return false; 402991f5b36SJiong Wang 403991f5b36SJiong Wang return BPF_SRC(code) == BPF_X; 404991f5b36SJiong Wang } 405991f5b36SJiong Wang 406d9ae7f2bSJakub Kicinski /** 407d9ae7f2bSJakub Kicinski * struct nfp_prog - nfp BPF program 40877a844eeSJakub Kicinski * @bpf: backpointer to the bpf app priv structure 409d9ae7f2bSJakub Kicinski * @prog: machine code 410d9ae7f2bSJakub Kicinski * @prog_len: number of valid instructions in @prog array 411d9ae7f2bSJakub Kicinski * @__prog_alloc_len: alloc size of @prog array 412c6c580d7SJakub Kicinski * @verifier_meta: temporary storage for verifier's insn meta 413012bb8a8SJakub Kicinski * @type: BPF program type 414854dc87dSJiong Wang * @last_bpf_off: address of the last instruction translated from BPF 415d9ae7f2bSJakub Kicinski * @tgt_out: jump target for normal exit 416d9ae7f2bSJakub Kicinski * @tgt_abort: jump target for abort (e.g. access outside of packet buffer) 417d9ae7f2bSJakub Kicinski * @n_translated: number of successfully translated instructions (for errors) 418d9ae7f2bSJakub Kicinski * @error: error code if something went wrong 419ee9133a8SJakub Kicinski * @stack_depth: max stack depth from the verifier 4208231f844SJakub Kicinski * @adjust_head_location: if program has single adjust head call - the insn no. 421630a4d38SJakub Kicinski * @map_records_cnt: the number of map pointers recorded for this prog 422630a4d38SJakub Kicinski * @map_records: the map record pointers from bpf->maps_neutral 423d9ae7f2bSJakub Kicinski * @insns: list of BPF instruction wrappers (struct nfp_insn_meta) 424d9ae7f2bSJakub Kicinski */ 425d9ae7f2bSJakub Kicinski struct nfp_prog { 42677a844eeSJakub Kicinski struct nfp_app_bpf *bpf; 42777a844eeSJakub Kicinski 428d9ae7f2bSJakub Kicinski u64 *prog; 429d9ae7f2bSJakub Kicinski unsigned int prog_len; 430d9ae7f2bSJakub Kicinski unsigned int __prog_alloc_len; 431d9ae7f2bSJakub Kicinski 432c6c580d7SJakub Kicinski struct nfp_insn_meta *verifier_meta; 433c6c580d7SJakub Kicinski 434012bb8a8SJakub Kicinski enum bpf_prog_type type; 435d9ae7f2bSJakub Kicinski 436854dc87dSJiong Wang unsigned int last_bpf_off; 437d9ae7f2bSJakub Kicinski unsigned int tgt_out; 438d9ae7f2bSJakub Kicinski unsigned int tgt_abort; 439d9ae7f2bSJakub Kicinski 440d9ae7f2bSJakub Kicinski unsigned int n_translated; 441d9ae7f2bSJakub Kicinski int error; 442d9ae7f2bSJakub Kicinski 443ee9133a8SJakub Kicinski unsigned int stack_depth; 4448231f844SJakub Kicinski unsigned int adjust_head_location; 445ee9133a8SJakub Kicinski 446630a4d38SJakub Kicinski unsigned int map_records_cnt; 447630a4d38SJakub Kicinski struct nfp_bpf_neutral_map **map_records; 448630a4d38SJakub Kicinski 449d9ae7f2bSJakub Kicinski struct list_head insns; 450d9ae7f2bSJakub Kicinski }; 451d9ae7f2bSJakub Kicinski 452d3f89b98SJakub Kicinski /** 453d3f89b98SJakub Kicinski * struct nfp_bpf_vnic - per-vNIC BPF priv structure 454d3f89b98SJakub Kicinski * @tc_prog: currently loaded cls_bpf program 4552314fe9eSJakub Kicinski * @start_off: address of the first instruction in the memory 4562314fe9eSJakub Kicinski * @tgt_done: jump target to get the next packet 457d3f89b98SJakub Kicinski */ 458d3f89b98SJakub Kicinski struct nfp_bpf_vnic { 459d3f89b98SJakub Kicinski struct bpf_prog *tc_prog; 4602314fe9eSJakub Kicinski unsigned int start_off; 4612314fe9eSJakub Kicinski unsigned int tgt_done; 462d3f89b98SJakub Kicinski }; 463d3f89b98SJakub Kicinski 4641549921dSJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt); 465c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *prog); 46674801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code); 467d9ae7f2bSJakub Kicinski 468cae1927cSJakub Kicinski extern const struct bpf_prog_offload_ops nfp_bpf_analyzer_ops; 469d9ae7f2bSJakub Kicinski 470c6c580d7SJakub Kicinski struct netdev_bpf; 471c6c580d7SJakub Kicinski struct nfp_app; 472bb45e51cSJakub Kicinski struct nfp_net; 473bb45e51cSJakub Kicinski 474af93d15aSJakub Kicinski int nfp_ndo_bpf(struct nfp_app *app, struct nfp_net *nn, 475af93d15aSJakub Kicinski struct netdev_bpf *bpf); 4769ce7a956SJakub Kicinski int nfp_net_bpf_offload(struct nfp_net *nn, struct bpf_prog *prog, 47752be9a7cSQuentin Monnet bool old_prog, struct netlink_ext_ack *extack); 478bb45e51cSJakub Kicinski 4795b674140SJiong Wang struct nfp_insn_meta * 4805b674140SJiong Wang nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 4815b674140SJiong Wang unsigned int insn_idx, unsigned int n_insns); 4822314fe9eSJakub Kicinski 4832314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv); 484d48ae231SJakub Kicinski 485ff3d43f7SJakub Kicinski long long int 486ff3d43f7SJakub Kicinski nfp_bpf_ctrl_alloc_map(struct nfp_app_bpf *bpf, struct bpf_map *map); 487ff3d43f7SJakub Kicinski void 488ff3d43f7SJakub Kicinski nfp_bpf_ctrl_free_map(struct nfp_app_bpf *bpf, struct nfp_bpf_map *nfp_map); 489ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_getfirst_entry(struct bpf_offloaded_map *offmap, 490ff3d43f7SJakub Kicinski void *next_key); 491ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_update_entry(struct bpf_offloaded_map *offmap, 492ff3d43f7SJakub Kicinski void *key, void *value, u64 flags); 493ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_del_entry(struct bpf_offloaded_map *offmap, void *key); 494ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_lookup_entry(struct bpf_offloaded_map *offmap, 495ff3d43f7SJakub Kicinski void *key, void *value); 496ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_getnext_entry(struct bpf_offloaded_map *offmap, 497ff3d43f7SJakub Kicinski void *key, void *next_key); 498ff3d43f7SJakub Kicinski 4999816dd35SJakub Kicinski int nfp_bpf_event_output(struct nfp_app_bpf *bpf, struct sk_buff *skb); 5009816dd35SJakub Kicinski 501d48ae231SJakub Kicinski void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb); 502d9ae7f2bSJakub Kicinski #endif 503