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 #ifndef __NFP_BPF_H__ 5d9ae7f2bSJakub Kicinski #define __NFP_BPF_H__ 1 6d9ae7f2bSJakub Kicinski 7d9ae7f2bSJakub Kicinski #include <linux/bitfield.h> 8d9ae7f2bSJakub Kicinski #include <linux/bpf.h> 92ca71441SJakub Kicinski #include <linux/bpf_verifier.h> 10d48ae231SJakub Kicinski #include <linux/kernel.h> 11d9ae7f2bSJakub Kicinski #include <linux/list.h> 12630a4d38SJakub Kicinski #include <linux/rhashtable.h> 13d48ae231SJakub Kicinski #include <linux/skbuff.h> 14d9ae7f2bSJakub Kicinski #include <linux/types.h> 15d48ae231SJakub Kicinski #include <linux/wait.h> 16d9ae7f2bSJakub Kicinski 17bcf0cafaSJakub Kicinski #include "../ccm.h" 18b3f868dfSJakub Kicinski #include "../nfp_asm.h" 19d48ae231SJakub Kicinski #include "fw.h" 20c66a9cf4SJakub Kicinski 21ab01f4acSJakub Kicinski #define cmsg_warn(bpf, msg...) nn_dp_warn(&(bpf)->app->ctrl->dp, msg) 22ab01f4acSJakub Kicinski 232314fe9eSJakub Kicinski /* For relocation logic use up-most byte of branch instruction as scratch 24d9ae7f2bSJakub Kicinski * area. Remember to clear this before sending instructions to HW! 25d9ae7f2bSJakub Kicinski */ 262314fe9eSJakub Kicinski #define OP_RELO_TYPE 0xff00000000000000ULL 27d9ae7f2bSJakub Kicinski 282314fe9eSJakub Kicinski enum nfp_relo_type { 292314fe9eSJakub Kicinski RELO_NONE = 0, 302314fe9eSJakub Kicinski /* standard internal jumps */ 312314fe9eSJakub Kicinski RELO_BR_REL, 322314fe9eSJakub Kicinski /* internal jumps to parts of the outro */ 332314fe9eSJakub Kicinski RELO_BR_GO_OUT, 342314fe9eSJakub Kicinski RELO_BR_GO_ABORT, 35389f263bSQuentin Monnet RELO_BR_GO_CALL_PUSH_REGS, 36389f263bSQuentin Monnet RELO_BR_GO_CALL_POP_REGS, 372314fe9eSJakub Kicinski /* external jumps to fixed addresses */ 382314fe9eSJakub Kicinski RELO_BR_NEXT_PKT, 3977a3d311SJakub Kicinski RELO_BR_HELPER, 4077a3d311SJakub Kicinski /* immediate relocation against load address */ 4177a3d311SJakub Kicinski RELO_IMMED_REL, 42d9ae7f2bSJakub Kicinski }; 43d9ae7f2bSJakub Kicinski 44e84797feSJakub Kicinski /* To make absolute relocated branches (branches other than RELO_BR_REL) 45e84797feSJakub Kicinski * distinguishable in user space dumps from normal jumps, add a large offset 46e84797feSJakub Kicinski * to them. 47e84797feSJakub Kicinski */ 48e84797feSJakub Kicinski #define BR_OFF_RELO 15000 49e84797feSJakub Kicinski 50d9ae7f2bSJakub Kicinski enum static_regs { 51dcb0c27fSJakub Kicinski STATIC_REG_IMMA = 20, /* Bank AB */ 5218e53b6cSJakub Kicinski STATIC_REG_IMM = 21, /* Bank AB */ 53d3488480SJakub Kicinski STATIC_REG_STACK = 22, /* Bank A */ 5418e53b6cSJakub Kicinski STATIC_REG_PKT_LEN = 22, /* Bank B */ 5518e53b6cSJakub Kicinski }; 5618e53b6cSJakub Kicinski 5718e53b6cSJakub Kicinski enum pkt_vec { 5818e53b6cSJakub Kicinski PKT_VEC_PKT_LEN = 0, 5918e53b6cSJakub Kicinski PKT_VEC_PKT_PTR = 2, 60d985888fSJakub Kicinski PKT_VEC_QSEL_SET = 4, 61d985888fSJakub Kicinski PKT_VEC_QSEL_VAL = 6, 62d9ae7f2bSJakub Kicinski }; 63d9ae7f2bSJakub Kicinski 64d985888fSJakub Kicinski #define PKT_VEL_QSEL_SET_BIT 4 65d985888fSJakub Kicinski 6618e53b6cSJakub Kicinski #define pv_len(np) reg_lm(1, PKT_VEC_PKT_LEN) 6718e53b6cSJakub Kicinski #define pv_ctm_ptr(np) reg_lm(1, PKT_VEC_PKT_PTR) 68d985888fSJakub Kicinski #define pv_qsel_set(np) reg_lm(1, PKT_VEC_QSEL_SET) 69d985888fSJakub Kicinski #define pv_qsel_val(np) reg_lm(1, PKT_VEC_QSEL_VAL) 7018e53b6cSJakub Kicinski 71d3488480SJakub Kicinski #define stack_reg(np) reg_a(STATIC_REG_STACK) 72d3488480SJakub Kicinski #define stack_imm(np) imm_b(np) 7318e53b6cSJakub Kicinski #define plen_reg(np) reg_b(STATIC_REG_PKT_LEN) 7418e53b6cSJakub Kicinski #define pptr_reg(np) pv_ctm_ptr(np) 7518e53b6cSJakub Kicinski #define imm_a(np) reg_a(STATIC_REG_IMM) 7618e53b6cSJakub Kicinski #define imm_b(np) reg_b(STATIC_REG_IMM) 77dcb0c27fSJakub Kicinski #define imma_a(np) reg_a(STATIC_REG_IMMA) 78dcb0c27fSJakub Kicinski #define imma_b(np) reg_b(STATIC_REG_IMMA) 7918e53b6cSJakub Kicinski #define imm_both(np) reg_both(STATIC_REG_IMM) 80389f263bSQuentin Monnet #define ret_reg(np) imm_a(np) 81d9ae7f2bSJakub Kicinski 82509144e2SJakub Kicinski #define NFP_BPF_ABI_FLAGS reg_imm(0) 83d9ae7f2bSJakub Kicinski #define NFP_BPF_ABI_FLAG_MARK 1 84d9ae7f2bSJakub Kicinski 8577a844eeSJakub Kicinski /** 8677a844eeSJakub Kicinski * struct nfp_app_bpf - bpf app priv structure 8777a844eeSJakub Kicinski * @app: backpointer to the app 88bcf0cafaSJakub Kicinski * @ccm: common control message handler data 890d49eaf4SJakub Kicinski * 90602144c2SJakub Kicinski * @bpf_dev: BPF offload device handle 91602144c2SJakub Kicinski * 920c9864c0SJakub Kicinski * @cmsg_key_sz: size of key in cmsg element array 930c9864c0SJakub Kicinski * @cmsg_val_sz: size of value in cmsg element array 940c9864c0SJakub Kicinski * 954da98eeaSJakub Kicinski * @map_list: list of offloaded maps 961bba4c41SJakub Kicinski * @maps_in_use: number of currently offloaded maps 971bba4c41SJakub Kicinski * @map_elems_in_use: number of elements allocated to offloaded maps 984da98eeaSJakub Kicinski * 99630a4d38SJakub Kicinski * @maps_neutral: hash table of offload-neutral maps (on pointer) 100630a4d38SJakub Kicinski * 10128264eb2SJakub Kicinski * @abi_version: global BPF ABI version 102f24e2909SJakub Kicinski * @cmsg_cache_cnt: number of entries to read for caching 10328264eb2SJakub Kicinski * 1040d49eaf4SJakub Kicinski * @adjust_head: adjust head capability 105703f578aSJakub Kicinski * @adjust_head.flags: extra flags for adjust head 106703f578aSJakub Kicinski * @adjust_head.off_min: minimal packet offset within buffer required 107703f578aSJakub Kicinski * @adjust_head.off_max: maximum packet offset within buffer required 108703f578aSJakub Kicinski * @adjust_head.guaranteed_sub: negative adjustment guaranteed possible 109703f578aSJakub Kicinski * @adjust_head.guaranteed_add: positive adjustment guaranteed possible 1109d080d5dSJakub Kicinski * 1119d080d5dSJakub Kicinski * @maps: map capability 112703f578aSJakub Kicinski * @maps.types: supported map types 113703f578aSJakub Kicinski * @maps.max_maps: max number of maps supported 114703f578aSJakub Kicinski * @maps.max_elems: max number of entries in each map 115703f578aSJakub Kicinski * @maps.max_key_sz: max size of map key 116703f578aSJakub Kicinski * @maps.max_val_sz: max size of map value 117703f578aSJakub Kicinski * @maps.max_elem_sz: max size of map entry (key + value) 1189d080d5dSJakub Kicinski * 1199d080d5dSJakub Kicinski * @helpers: helper addressess for various calls 120703f578aSJakub Kicinski * @helpers.map_lookup: map lookup helper address 12144d65a47SJakub Kicinski * @helpers.map_update: map update helper address 122bfee64deSJakub Kicinski * @helpers.map_delete: map delete helper address 1239816dd35SJakub Kicinski * @helpers.perf_event_output: output perf event to a ring buffer 124df4a37d8SJakub Kicinski * 125df4a37d8SJakub Kicinski * @pseudo_random: FW initialized the pseudo-random machinery (CSRs) 126d985888fSJakub Kicinski * @queue_select: BPF can set the RX queue ID in packet vector 1270c261593SJakub Kicinski * @adjust_tail: BPF can simply trunc packet size for adjust tail 128f24e2909SJakub Kicinski * @cmsg_multi_ent: FW can pack multiple map entries in a single cmsg 12977a844eeSJakub Kicinski */ 13077a844eeSJakub Kicinski struct nfp_app_bpf { 13177a844eeSJakub Kicinski struct nfp_app *app; 132bcf0cafaSJakub Kicinski struct nfp_ccm ccm; 1330d49eaf4SJakub Kicinski 134602144c2SJakub Kicinski struct bpf_offload_dev *bpf_dev; 135602144c2SJakub Kicinski 1360c9864c0SJakub Kicinski unsigned int cmsg_key_sz; 1370c9864c0SJakub Kicinski unsigned int cmsg_val_sz; 1380c9864c0SJakub Kicinski 139f24e2909SJakub Kicinski unsigned int cmsg_cache_cnt; 140f24e2909SJakub Kicinski 1414da98eeaSJakub Kicinski struct list_head map_list; 1421bba4c41SJakub Kicinski unsigned int maps_in_use; 1431bba4c41SJakub Kicinski unsigned int map_elems_in_use; 1444da98eeaSJakub Kicinski 145630a4d38SJakub Kicinski struct rhashtable maps_neutral; 146630a4d38SJakub Kicinski 14728264eb2SJakub Kicinski u32 abi_version; 14828264eb2SJakub Kicinski 1490d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head { 1500d49eaf4SJakub Kicinski u32 flags; 1510d49eaf4SJakub Kicinski int off_min; 1520d49eaf4SJakub Kicinski int off_max; 1538231f844SJakub Kicinski int guaranteed_sub; 1548231f844SJakub Kicinski int guaranteed_add; 1550d49eaf4SJakub Kicinski } adjust_head; 1569d080d5dSJakub Kicinski 1579d080d5dSJakub Kicinski struct { 1589d080d5dSJakub Kicinski u32 types; 1599d080d5dSJakub Kicinski u32 max_maps; 1609d080d5dSJakub Kicinski u32 max_elems; 1619d080d5dSJakub Kicinski u32 max_key_sz; 1629d080d5dSJakub Kicinski u32 max_val_sz; 1639d080d5dSJakub Kicinski u32 max_elem_sz; 1649d080d5dSJakub Kicinski } maps; 1659d080d5dSJakub Kicinski 1669d080d5dSJakub Kicinski struct { 1679d080d5dSJakub Kicinski u32 map_lookup; 16844d65a47SJakub Kicinski u32 map_update; 169bfee64deSJakub Kicinski u32 map_delete; 1709816dd35SJakub Kicinski u32 perf_event_output; 1719d080d5dSJakub Kicinski } helpers; 172df4a37d8SJakub Kicinski 173df4a37d8SJakub Kicinski bool pseudo_random; 174d985888fSJakub Kicinski bool queue_select; 1750c261593SJakub Kicinski bool adjust_tail; 176f24e2909SJakub Kicinski bool cmsg_multi_ent; 17777a844eeSJakub Kicinski }; 17877a844eeSJakub Kicinski 179dcb0c27fSJakub Kicinski enum nfp_bpf_map_use { 180dcb0c27fSJakub Kicinski NFP_MAP_UNUSED = 0, 181dcb0c27fSJakub Kicinski NFP_MAP_USE_READ, 182dcb0c27fSJakub Kicinski NFP_MAP_USE_WRITE, 183dcb0c27fSJakub Kicinski NFP_MAP_USE_ATOMIC_CNT, 184dcb0c27fSJakub Kicinski }; 185dcb0c27fSJakub Kicinski 186527db74bSJakub Kicinski struct nfp_bpf_map_word { 187527db74bSJakub Kicinski unsigned char type :4; 188527db74bSJakub Kicinski unsigned char non_zero_update :1; 189527db74bSJakub Kicinski }; 190527db74bSJakub Kicinski 191f24e2909SJakub Kicinski #define NFP_BPF_MAP_CACHE_CNT 4U 192f24e2909SJakub Kicinski #define NFP_BPF_MAP_CACHE_TIME_NS (250 * 1000) 193f24e2909SJakub Kicinski 1944da98eeaSJakub Kicinski /** 1954da98eeaSJakub Kicinski * struct nfp_bpf_map - private per-map data attached to BPF maps for offload 1964da98eeaSJakub Kicinski * @offmap: pointer to the offloaded BPF map 1974da98eeaSJakub Kicinski * @bpf: back pointer to bpf app private structure 1984da98eeaSJakub Kicinski * @tid: table id identifying map on datapath 199f24e2909SJakub Kicinski * 200f24e2909SJakub Kicinski * @cache_lock: protects @cache_blockers, @cache_to, @cache 201f24e2909SJakub Kicinski * @cache_blockers: number of ops in flight which block caching 202f24e2909SJakub Kicinski * @cache_gen: counter incremented by every blocker on exit 203f24e2909SJakub Kicinski * @cache_to: time when cache will no longer be valid (ns) 204f24e2909SJakub Kicinski * @cache: skb with cached response 205f24e2909SJakub Kicinski * 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; 213f24e2909SJakub Kicinski 214f24e2909SJakub Kicinski spinlock_t cache_lock; 215f24e2909SJakub Kicinski u32 cache_blockers; 216f24e2909SJakub Kicinski u32 cache_gen; 217f24e2909SJakub Kicinski u64 cache_to; 218f24e2909SJakub Kicinski struct sk_buff *cache; 219f24e2909SJakub Kicinski 2204da98eeaSJakub Kicinski struct list_head l; 221527db74bSJakub Kicinski struct nfp_bpf_map_word use_map[]; 2224da98eeaSJakub Kicinski }; 2234da98eeaSJakub Kicinski 224630a4d38SJakub Kicinski struct nfp_bpf_neutral_map { 225630a4d38SJakub Kicinski struct rhash_head l; 226630a4d38SJakub Kicinski struct bpf_map *ptr; 227ab01f4acSJakub Kicinski u32 map_id; 228630a4d38SJakub Kicinski u32 count; 229630a4d38SJakub Kicinski }; 230630a4d38SJakub Kicinski 231630a4d38SJakub Kicinski extern const struct rhashtable_params nfp_bpf_maps_neutral_params; 232630a4d38SJakub Kicinski 233d9ae7f2bSJakub Kicinski struct nfp_prog; 234d9ae7f2bSJakub Kicinski struct nfp_insn_meta; 235d9ae7f2bSJakub Kicinski typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); 236d9ae7f2bSJakub Kicinski 237d9ae7f2bSJakub Kicinski #define nfp_prog_first_meta(nfp_prog) \ 238d9ae7f2bSJakub Kicinski list_first_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 239d9ae7f2bSJakub Kicinski #define nfp_prog_last_meta(nfp_prog) \ 240d9ae7f2bSJakub Kicinski list_last_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 241d9ae7f2bSJakub Kicinski #define nfp_meta_next(meta) list_next_entry(meta, l) 242d9ae7f2bSJakub Kicinski #define nfp_meta_prev(meta) list_prev_entry(meta, l) 243d9ae7f2bSJakub Kicinski 2442f46e0c1SJakub Kicinski /** 2452f46e0c1SJakub Kicinski * struct nfp_bpf_reg_state - register state for calls 2462f46e0c1SJakub Kicinski * @reg: BPF register state from latest path 2472f46e0c1SJakub Kicinski * @var_off: for stack arg - changes stack offset on different paths 2482f46e0c1SJakub Kicinski */ 2492f46e0c1SJakub Kicinski struct nfp_bpf_reg_state { 2502f46e0c1SJakub Kicinski struct bpf_reg_state reg; 2512f46e0c1SJakub Kicinski bool var_off; 2522f46e0c1SJakub Kicinski }; 2532f46e0c1SJakub Kicinski 254a09d5c52SJiong Wang #define FLAG_INSN_IS_JUMP_DST BIT(0) 255e3b49dc6SQuentin Monnet #define FLAG_INSN_IS_SUBPROG_START BIT(1) 2567ff0ccdeSQuentin Monnet #define FLAG_INSN_PTR_CALLER_STACK_FRAME BIT(2) 25791a87a58SJakub Kicinski /* Instruction is pointless, noop even on its own */ 25891a87a58SJakub Kicinski #define FLAG_INSN_SKIP_NOOP BIT(3) 25991a87a58SJakub Kicinski /* Instruction is optimized out based on preceding instructions */ 26091a87a58SJakub Kicinski #define FLAG_INSN_SKIP_PREC_DEPENDENT BIT(4) 2619a06927eSJakub Kicinski /* Instruction is optimized by the verifier */ 2629a06927eSJakub Kicinski #define FLAG_INSN_SKIP_VERIFIER_OPT BIT(5) 2630b4de1ffSJiong Wang /* Instruction needs to zero extend to high 32-bit */ 2640b4de1ffSJiong Wang #define FLAG_INSN_DO_ZEXT BIT(6) 26591a87a58SJakub Kicinski 26691a87a58SJakub Kicinski #define FLAG_INSN_SKIP_MASK (FLAG_INSN_SKIP_NOOP | \ 2679a06927eSJakub Kicinski FLAG_INSN_SKIP_PREC_DEPENDENT | \ 2689a06927eSJakub Kicinski FLAG_INSN_SKIP_VERIFIER_OPT) 269a09d5c52SJiong Wang 270d9ae7f2bSJakub Kicinski /** 271d9ae7f2bSJakub Kicinski * struct nfp_insn_meta - BPF instruction wrapper 272d9ae7f2bSJakub Kicinski * @insn: BPF instruction 2732ca71441SJakub Kicinski * @ptr: pointer type for memory operations 2749879a381SJiong Wang * @ldst_gather_len: memcpy length gathered from load/store sequence 2759879a381SJiong Wang * @paired_st: the paired store insn at the head of the sequence 276b14157eeSJakub Kicinski * @ptr_not_const: pointer is not always constant 277be759237SJiong Wang * @pkt_cache: packet data cache information 278be759237SJiong Wang * @pkt_cache.range_start: start offset for associated packet data cache 279be759237SJiong Wang * @pkt_cache.range_end: end offset for associated packet data cache 280be759237SJiong Wang * @pkt_cache.do_init: this read needs to initialize packet data cache 28141aed09cSJakub Kicinski * @xadd_over_16bit: 16bit immediate is not guaranteed 28241aed09cSJakub Kicinski * @xadd_maybe_16bit: 16bit immediate is possible 2835b674140SJiong Wang * @jmp_dst: destination info for jump instructions 2847bdc97beSJakub Kicinski * @jump_neg_op: jump instruction has inverted immediate, use ADD instead of SUB 285bdf4c66fSQuentin Monnet * @num_insns_after_br: number of insns following a branch jump, used for fixup 28677a3d311SJakub Kicinski * @func_id: function id for call instructions 28777a3d311SJakub Kicinski * @arg1: arg1 for call instructions 28877a3d311SJakub Kicinski * @arg2: arg2 for call instructions 289662c5472SJiong Wang * @umin_src: copy of core verifier umin_value for src opearnd. 290662c5472SJiong Wang * @umax_src: copy of core verifier umax_value for src operand. 29133b94310SJiong Wang * @umin_dst: copy of core verifier umin_value for dst opearnd. 29233b94310SJiong Wang * @umax_dst: copy of core verifier umax_value for dst operand. 293d9ae7f2bSJakub Kicinski * @off: index of first generated machine instruction (in nfp_prog.prog) 294d9ae7f2bSJakub Kicinski * @n: eBPF instruction number 295a09d5c52SJiong Wang * @flags: eBPF instruction extra optimization flags 296389f263bSQuentin Monnet * @subprog_idx: index of subprogram to which the instruction belongs 297d9ae7f2bSJakub Kicinski * @double_cb: callback for second part of the instruction 298d9ae7f2bSJakub Kicinski * @l: link on nfp_prog->insns list 299d9ae7f2bSJakub Kicinski */ 300d9ae7f2bSJakub Kicinski struct nfp_insn_meta { 301d9ae7f2bSJakub Kicinski struct bpf_insn insn; 3025b674140SJiong Wang union { 30341aed09cSJakub Kicinski /* pointer ops (ld/st/xadd) */ 3045b674140SJiong Wang struct { 3052ca71441SJakub Kicinski struct bpf_reg_state ptr; 3069879a381SJiong Wang struct bpf_insn *paired_st; 3079879a381SJiong Wang s16 ldst_gather_len; 308b14157eeSJakub Kicinski bool ptr_not_const; 309be759237SJiong Wang struct { 310be759237SJiong Wang s16 range_start; 311be759237SJiong Wang s16 range_end; 312be759237SJiong Wang bool do_init; 313be759237SJiong Wang } pkt_cache; 31441aed09cSJakub Kicinski bool xadd_over_16bit; 31541aed09cSJakub Kicinski bool xadd_maybe_16bit; 3165b674140SJiong Wang }; 31741aed09cSJakub Kicinski /* jump */ 3187bdc97beSJakub Kicinski struct { 3195b674140SJiong Wang struct nfp_insn_meta *jmp_dst; 3207bdc97beSJakub Kicinski bool jump_neg_op; 321bdf4c66fSQuentin Monnet u32 num_insns_after_br; /* only for BPF-to-BPF calls */ 3227bdc97beSJakub Kicinski }; 32341aed09cSJakub Kicinski /* function calls */ 32477a3d311SJakub Kicinski struct { 32577a3d311SJakub Kicinski u32 func_id; 32677a3d311SJakub Kicinski struct bpf_reg_state arg1; 3272f46e0c1SJakub Kicinski struct nfp_bpf_reg_state arg2; 32877a3d311SJakub Kicinski }; 32933b94310SJiong Wang /* We are interested in range info for operands of ALU 33033b94310SJiong Wang * operations. For example, shift amount, multiplicand and 33133b94310SJiong Wang * multiplier etc. 332991f5b36SJiong Wang */ 333991f5b36SJiong Wang struct { 334662c5472SJiong Wang u64 umin_src; 335662c5472SJiong Wang u64 umax_src; 33633b94310SJiong Wang u64 umin_dst; 33733b94310SJiong Wang u64 umax_dst; 338991f5b36SJiong Wang }; 3395b674140SJiong Wang }; 340d9ae7f2bSJakub Kicinski unsigned int off; 341d9ae7f2bSJakub Kicinski unsigned short n; 342a09d5c52SJiong Wang unsigned short flags; 343389f263bSQuentin Monnet unsigned short subprog_idx; 344d9ae7f2bSJakub Kicinski instr_cb_t double_cb; 345d9ae7f2bSJakub Kicinski 346d9ae7f2bSJakub Kicinski struct list_head l; 347d9ae7f2bSJakub Kicinski }; 348d9ae7f2bSJakub Kicinski 349d9ae7f2bSJakub Kicinski #define BPF_SIZE_MASK 0x18 350d9ae7f2bSJakub Kicinski 351d9ae7f2bSJakub Kicinski static inline u8 mbpf_class(const struct nfp_insn_meta *meta) 352d9ae7f2bSJakub Kicinski { 353d9ae7f2bSJakub Kicinski return BPF_CLASS(meta->insn.code); 354d9ae7f2bSJakub Kicinski } 355d9ae7f2bSJakub Kicinski 356d9ae7f2bSJakub Kicinski static inline u8 mbpf_src(const struct nfp_insn_meta *meta) 357d9ae7f2bSJakub Kicinski { 358d9ae7f2bSJakub Kicinski return BPF_SRC(meta->insn.code); 359d9ae7f2bSJakub Kicinski } 360d9ae7f2bSJakub Kicinski 361d9ae7f2bSJakub Kicinski static inline u8 mbpf_op(const struct nfp_insn_meta *meta) 362d9ae7f2bSJakub Kicinski { 363d9ae7f2bSJakub Kicinski return BPF_OP(meta->insn.code); 364d9ae7f2bSJakub Kicinski } 365d9ae7f2bSJakub Kicinski 366d9ae7f2bSJakub Kicinski static inline u8 mbpf_mode(const struct nfp_insn_meta *meta) 367d9ae7f2bSJakub Kicinski { 368d9ae7f2bSJakub Kicinski return BPF_MODE(meta->insn.code); 369d9ae7f2bSJakub Kicinski } 370d9ae7f2bSJakub Kicinski 37133b94310SJiong Wang static inline bool is_mbpf_alu(const struct nfp_insn_meta *meta) 37233b94310SJiong Wang { 37333b94310SJiong Wang return mbpf_class(meta) == BPF_ALU64 || mbpf_class(meta) == BPF_ALU; 37433b94310SJiong Wang } 37533b94310SJiong Wang 3765e4d6d20SJiong Wang static inline bool is_mbpf_load(const struct nfp_insn_meta *meta) 3775e4d6d20SJiong Wang { 3785e4d6d20SJiong Wang return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_LDX | BPF_MEM); 3795e4d6d20SJiong Wang } 3805e4d6d20SJiong Wang 38146144839SJiong Wang static inline bool is_mbpf_jmp32(const struct nfp_insn_meta *meta) 38246144839SJiong Wang { 38346144839SJiong Wang return mbpf_class(meta) == BPF_JMP32; 38446144839SJiong Wang } 38546144839SJiong Wang 38646144839SJiong Wang static inline bool is_mbpf_jmp64(const struct nfp_insn_meta *meta) 38746144839SJiong Wang { 38846144839SJiong Wang return mbpf_class(meta) == BPF_JMP; 38946144839SJiong Wang } 39046144839SJiong Wang 39146144839SJiong Wang static inline bool is_mbpf_jmp(const struct nfp_insn_meta *meta) 39246144839SJiong Wang { 39346144839SJiong Wang return is_mbpf_jmp32(meta) || is_mbpf_jmp64(meta); 39446144839SJiong Wang } 39546144839SJiong Wang 3965e4d6d20SJiong Wang static inline bool is_mbpf_store(const struct nfp_insn_meta *meta) 3975e4d6d20SJiong Wang { 3985e4d6d20SJiong Wang return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_STX | BPF_MEM); 3995e4d6d20SJiong Wang } 4005e4d6d20SJiong Wang 40187b10ecdSJiong Wang static inline bool is_mbpf_load_pkt(const struct nfp_insn_meta *meta) 40287b10ecdSJiong Wang { 40387b10ecdSJiong Wang return is_mbpf_load(meta) && meta->ptr.type == PTR_TO_PACKET; 40487b10ecdSJiong Wang } 40587b10ecdSJiong Wang 40687b10ecdSJiong Wang static inline bool is_mbpf_store_pkt(const struct nfp_insn_meta *meta) 40787b10ecdSJiong Wang { 40887b10ecdSJiong Wang return is_mbpf_store(meta) && meta->ptr.type == PTR_TO_PACKET; 40987b10ecdSJiong Wang } 41087b10ecdSJiong Wang 41187b10ecdSJiong Wang static inline bool is_mbpf_classic_load(const struct nfp_insn_meta *meta) 41287b10ecdSJiong Wang { 41387b10ecdSJiong Wang u8 code = meta->insn.code; 41487b10ecdSJiong Wang 41587b10ecdSJiong Wang return BPF_CLASS(code) == BPF_LD && 41687b10ecdSJiong Wang (BPF_MODE(code) == BPF_ABS || BPF_MODE(code) == BPF_IND); 41787b10ecdSJiong Wang } 41887b10ecdSJiong Wang 41987b10ecdSJiong Wang static inline bool is_mbpf_classic_store(const struct nfp_insn_meta *meta) 42087b10ecdSJiong Wang { 42187b10ecdSJiong Wang u8 code = meta->insn.code; 42287b10ecdSJiong Wang 42387b10ecdSJiong Wang return BPF_CLASS(code) == BPF_ST && BPF_MODE(code) == BPF_MEM; 42487b10ecdSJiong Wang } 42587b10ecdSJiong Wang 42687b10ecdSJiong Wang static inline bool is_mbpf_classic_store_pkt(const struct nfp_insn_meta *meta) 42787b10ecdSJiong Wang { 42887b10ecdSJiong Wang return is_mbpf_classic_store(meta) && meta->ptr.type == PTR_TO_PACKET; 42987b10ecdSJiong Wang } 43087b10ecdSJiong Wang 431dcb0c27fSJakub Kicinski static inline bool is_mbpf_xadd(const struct nfp_insn_meta *meta) 432dcb0c27fSJakub Kicinski { 433dcb0c27fSJakub Kicinski return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_STX | BPF_XADD); 434dcb0c27fSJakub Kicinski } 435dcb0c27fSJakub Kicinski 436d3d23fdbSJiong Wang static inline bool is_mbpf_mul(const struct nfp_insn_meta *meta) 437d3d23fdbSJiong Wang { 438d3d23fdbSJiong Wang return is_mbpf_alu(meta) && mbpf_op(meta) == BPF_MUL; 439d3d23fdbSJiong Wang } 440d3d23fdbSJiong Wang 4412a952b03SJiong Wang static inline bool is_mbpf_div(const struct nfp_insn_meta *meta) 4422a952b03SJiong Wang { 4432a952b03SJiong Wang return is_mbpf_alu(meta) && mbpf_op(meta) == BPF_DIV; 4442a952b03SJiong Wang } 4452a952b03SJiong Wang 446a32014b3SJakub Kicinski static inline bool is_mbpf_cond_jump(const struct nfp_insn_meta *meta) 447a32014b3SJakub Kicinski { 448a32014b3SJakub Kicinski u8 op; 449a32014b3SJakub Kicinski 45046144839SJiong Wang if (is_mbpf_jmp32(meta)) 45146144839SJiong Wang return true; 45246144839SJiong Wang 45346144839SJiong Wang if (!is_mbpf_jmp64(meta)) 454a32014b3SJakub Kicinski return false; 455a32014b3SJakub Kicinski 45646144839SJiong Wang op = mbpf_op(meta); 457a32014b3SJakub Kicinski return op != BPF_JA && op != BPF_EXIT && op != BPF_CALL; 458a32014b3SJakub Kicinski } 459a32014b3SJakub Kicinski 460bcfdfb7cSQuentin Monnet static inline bool is_mbpf_helper_call(const struct nfp_insn_meta *meta) 461bcfdfb7cSQuentin Monnet { 462bcfdfb7cSQuentin Monnet struct bpf_insn insn = meta->insn; 463bcfdfb7cSQuentin Monnet 464bcfdfb7cSQuentin Monnet return insn.code == (BPF_JMP | BPF_CALL) && 465bcfdfb7cSQuentin Monnet insn.src_reg != BPF_PSEUDO_CALL; 466bcfdfb7cSQuentin Monnet } 467bcfdfb7cSQuentin Monnet 468389f263bSQuentin Monnet static inline bool is_mbpf_pseudo_call(const struct nfp_insn_meta *meta) 469389f263bSQuentin Monnet { 470389f263bSQuentin Monnet struct bpf_insn insn = meta->insn; 471389f263bSQuentin Monnet 472389f263bSQuentin Monnet return insn.code == (BPF_JMP | BPF_CALL) && 473389f263bSQuentin Monnet insn.src_reg == BPF_PSEUDO_CALL; 474389f263bSQuentin Monnet } 475389f263bSQuentin Monnet 476389f263bSQuentin Monnet #define STACK_FRAME_ALIGN 64 477389f263bSQuentin Monnet 478d9ae7f2bSJakub Kicinski /** 479c5da54d9SQuentin Monnet * struct nfp_bpf_subprog_info - nfp BPF sub-program (a.k.a. function) info 480c5da54d9SQuentin Monnet * @stack_depth: maximum stack depth used by this sub-program 48144549623SQuentin Monnet * @needs_reg_push: whether sub-program uses callee-saved registers 482c5da54d9SQuentin Monnet */ 483c5da54d9SQuentin Monnet struct nfp_bpf_subprog_info { 484c5da54d9SQuentin Monnet u16 stack_depth; 48544549623SQuentin Monnet u8 needs_reg_push : 1; 486c5da54d9SQuentin Monnet }; 487c5da54d9SQuentin Monnet 488c5da54d9SQuentin Monnet /** 489d9ae7f2bSJakub Kicinski * struct nfp_prog - nfp BPF program 49077a844eeSJakub Kicinski * @bpf: backpointer to the bpf app priv structure 491d9ae7f2bSJakub Kicinski * @prog: machine code 492d9ae7f2bSJakub Kicinski * @prog_len: number of valid instructions in @prog array 493d9ae7f2bSJakub Kicinski * @__prog_alloc_len: alloc size of @prog array 49444b6fed0SJakub Kicinski * @stack_size: total amount of stack used 495c6c580d7SJakub Kicinski * @verifier_meta: temporary storage for verifier's insn meta 496012bb8a8SJakub Kicinski * @type: BPF program type 497854dc87dSJiong Wang * @last_bpf_off: address of the last instruction translated from BPF 498d9ae7f2bSJakub Kicinski * @tgt_out: jump target for normal exit 499d9ae7f2bSJakub Kicinski * @tgt_abort: jump target for abort (e.g. access outside of packet buffer) 500389f263bSQuentin Monnet * @tgt_call_push_regs: jump target for subroutine for saving R6~R9 to stack 501389f263bSQuentin Monnet * @tgt_call_pop_regs: jump target for subroutine used for restoring R6~R9 502d9ae7f2bSJakub Kicinski * @n_translated: number of successfully translated instructions (for errors) 503d9ae7f2bSJakub Kicinski * @error: error code if something went wrong 5041a7e62e6SQuentin Monnet * @stack_frame_depth: max stack depth for current frame 5058231f844SJakub Kicinski * @adjust_head_location: if program has single adjust head call - the insn no. 506630a4d38SJakub Kicinski * @map_records_cnt: the number of map pointers recorded for this prog 507c5da54d9SQuentin Monnet * @subprog_cnt: number of sub-programs, including main function 508630a4d38SJakub Kicinski * @map_records: the map record pointers from bpf->maps_neutral 509c5da54d9SQuentin Monnet * @subprog: pointer to an array of objects holding info about sub-programs 510e2fc6114SJakub Kicinski * @n_insns: number of instructions on @insns list 511d9ae7f2bSJakub Kicinski * @insns: list of BPF instruction wrappers (struct nfp_insn_meta) 512d9ae7f2bSJakub Kicinski */ 513d9ae7f2bSJakub Kicinski struct nfp_prog { 51477a844eeSJakub Kicinski struct nfp_app_bpf *bpf; 51577a844eeSJakub Kicinski 516d9ae7f2bSJakub Kicinski u64 *prog; 517d9ae7f2bSJakub Kicinski unsigned int prog_len; 518d9ae7f2bSJakub Kicinski unsigned int __prog_alloc_len; 519d9ae7f2bSJakub Kicinski 52044b6fed0SJakub Kicinski unsigned int stack_size; 52144b6fed0SJakub Kicinski 522c6c580d7SJakub Kicinski struct nfp_insn_meta *verifier_meta; 523c6c580d7SJakub Kicinski 524012bb8a8SJakub Kicinski enum bpf_prog_type type; 525d9ae7f2bSJakub Kicinski 526854dc87dSJiong Wang unsigned int last_bpf_off; 527d9ae7f2bSJakub Kicinski unsigned int tgt_out; 528d9ae7f2bSJakub Kicinski unsigned int tgt_abort; 529389f263bSQuentin Monnet unsigned int tgt_call_push_regs; 530389f263bSQuentin Monnet unsigned int tgt_call_pop_regs; 531d9ae7f2bSJakub Kicinski 532d9ae7f2bSJakub Kicinski unsigned int n_translated; 533d9ae7f2bSJakub Kicinski int error; 534d9ae7f2bSJakub Kicinski 5351a7e62e6SQuentin Monnet unsigned int stack_frame_depth; 5368231f844SJakub Kicinski unsigned int adjust_head_location; 537ee9133a8SJakub Kicinski 538630a4d38SJakub Kicinski unsigned int map_records_cnt; 539c5da54d9SQuentin Monnet unsigned int subprog_cnt; 540630a4d38SJakub Kicinski struct nfp_bpf_neutral_map **map_records; 541c5da54d9SQuentin Monnet struct nfp_bpf_subprog_info *subprog; 542630a4d38SJakub Kicinski 543e2fc6114SJakub Kicinski unsigned int n_insns; 544d9ae7f2bSJakub Kicinski struct list_head insns; 545d9ae7f2bSJakub Kicinski }; 546d9ae7f2bSJakub Kicinski 547d3f89b98SJakub Kicinski /** 548d3f89b98SJakub Kicinski * struct nfp_bpf_vnic - per-vNIC BPF priv structure 549d3f89b98SJakub Kicinski * @tc_prog: currently loaded cls_bpf program 5502314fe9eSJakub Kicinski * @start_off: address of the first instruction in the memory 5512314fe9eSJakub Kicinski * @tgt_done: jump target to get the next packet 552d3f89b98SJakub Kicinski */ 553d3f89b98SJakub Kicinski struct nfp_bpf_vnic { 554d3f89b98SJakub Kicinski struct bpf_prog *tc_prog; 5552314fe9eSJakub Kicinski unsigned int start_off; 5562314fe9eSJakub Kicinski unsigned int tgt_done; 557d3f89b98SJakub Kicinski }; 558d3f89b98SJakub Kicinski 559389f263bSQuentin Monnet bool nfp_is_subprog_start(struct nfp_insn_meta *meta); 560e2fc6114SJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog); 561c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *prog); 56274801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code); 563d9ae7f2bSJakub Kicinski 5641da6f573SQuentin Monnet int nfp_verify_insn(struct bpf_verifier_env *env, int insn_idx, 5651da6f573SQuentin Monnet int prev_insn_idx); 5661da6f573SQuentin Monnet int nfp_bpf_finalize(struct bpf_verifier_env *env); 5671da6f573SQuentin Monnet 568a32014b3SJakub Kicinski int nfp_bpf_opt_replace_insn(struct bpf_verifier_env *env, u32 off, 569a32014b3SJakub Kicinski struct bpf_insn *insn); 5709a06927eSJakub Kicinski int nfp_bpf_opt_remove_insns(struct bpf_verifier_env *env, u32 off, u32 cnt); 571a32014b3SJakub Kicinski 5721385d755SQuentin Monnet extern const struct bpf_prog_offload_ops nfp_bpf_dev_ops; 573d9ae7f2bSJakub Kicinski 574c6c580d7SJakub Kicinski struct netdev_bpf; 575c6c580d7SJakub Kicinski struct nfp_app; 576bb45e51cSJakub Kicinski struct nfp_net; 577bb45e51cSJakub Kicinski 578af93d15aSJakub Kicinski int nfp_ndo_bpf(struct nfp_app *app, struct nfp_net *nn, 579af93d15aSJakub Kicinski struct netdev_bpf *bpf); 5809ce7a956SJakub Kicinski int nfp_net_bpf_offload(struct nfp_net *nn, struct bpf_prog *prog, 58152be9a7cSQuentin Monnet bool old_prog, struct netlink_ext_ack *extack); 582bb45e51cSJakub Kicinski 5835b674140SJiong Wang struct nfp_insn_meta * 5845b674140SJiong Wang nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 585e2fc6114SJakub Kicinski unsigned int insn_idx); 5862314fe9eSJakub Kicinski 5872314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv); 588d48ae231SJakub Kicinski 589bc2796dbSJakub Kicinski unsigned int nfp_bpf_ctrl_cmsg_min_mtu(struct nfp_app_bpf *bpf); 5900c9864c0SJakub Kicinski unsigned int nfp_bpf_ctrl_cmsg_mtu(struct nfp_app_bpf *bpf); 591f24e2909SJakub Kicinski unsigned int nfp_bpf_ctrl_cmsg_cache_cnt(struct nfp_app_bpf *bpf); 592ff3d43f7SJakub Kicinski long long int 593ff3d43f7SJakub Kicinski nfp_bpf_ctrl_alloc_map(struct nfp_app_bpf *bpf, struct bpf_map *map); 594ff3d43f7SJakub Kicinski void 595ff3d43f7SJakub Kicinski nfp_bpf_ctrl_free_map(struct nfp_app_bpf *bpf, struct nfp_bpf_map *nfp_map); 596ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_getfirst_entry(struct bpf_offloaded_map *offmap, 597ff3d43f7SJakub Kicinski void *next_key); 598ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_update_entry(struct bpf_offloaded_map *offmap, 599ff3d43f7SJakub Kicinski void *key, void *value, u64 flags); 600ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_del_entry(struct bpf_offloaded_map *offmap, void *key); 601ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_lookup_entry(struct bpf_offloaded_map *offmap, 602ff3d43f7SJakub Kicinski void *key, void *value); 603ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_getnext_entry(struct bpf_offloaded_map *offmap, 604ff3d43f7SJakub Kicinski void *key, void *next_key); 605ff3d43f7SJakub Kicinski 60620c54204SJakub Kicinski int nfp_bpf_event_output(struct nfp_app_bpf *bpf, const void *data, 60720c54204SJakub Kicinski unsigned int len); 6089816dd35SJakub Kicinski 609d48ae231SJakub Kicinski void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb); 61009587627SJakub Kicinski void 61109587627SJakub Kicinski nfp_bpf_ctrl_msg_rx_raw(struct nfp_app *app, const void *data, 61209587627SJakub Kicinski unsigned int len); 613d9ae7f2bSJakub Kicinski #endif 614