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 10228264eb2SJakub Kicinski * 1030d49eaf4SJakub Kicinski * @adjust_head: adjust head capability 104703f578aSJakub Kicinski * @adjust_head.flags: extra flags for adjust head 105703f578aSJakub Kicinski * @adjust_head.off_min: minimal packet offset within buffer required 106703f578aSJakub Kicinski * @adjust_head.off_max: maximum packet offset within buffer required 107703f578aSJakub Kicinski * @adjust_head.guaranteed_sub: negative adjustment guaranteed possible 108703f578aSJakub Kicinski * @adjust_head.guaranteed_add: positive adjustment guaranteed possible 1099d080d5dSJakub Kicinski * 1109d080d5dSJakub Kicinski * @maps: map capability 111703f578aSJakub Kicinski * @maps.types: supported map types 112703f578aSJakub Kicinski * @maps.max_maps: max number of maps supported 113703f578aSJakub Kicinski * @maps.max_elems: max number of entries in each map 114703f578aSJakub Kicinski * @maps.max_key_sz: max size of map key 115703f578aSJakub Kicinski * @maps.max_val_sz: max size of map value 116703f578aSJakub Kicinski * @maps.max_elem_sz: max size of map entry (key + value) 1179d080d5dSJakub Kicinski * 1189d080d5dSJakub Kicinski * @helpers: helper addressess for various calls 119703f578aSJakub Kicinski * @helpers.map_lookup: map lookup helper address 12044d65a47SJakub Kicinski * @helpers.map_update: map update helper address 121bfee64deSJakub Kicinski * @helpers.map_delete: map delete helper address 1229816dd35SJakub Kicinski * @helpers.perf_event_output: output perf event to a ring buffer 123df4a37d8SJakub Kicinski * 124df4a37d8SJakub Kicinski * @pseudo_random: FW initialized the pseudo-random machinery (CSRs) 125d985888fSJakub Kicinski * @queue_select: BPF can set the RX queue ID in packet vector 1260c261593SJakub Kicinski * @adjust_tail: BPF can simply trunc packet size for adjust tail 12777a844eeSJakub Kicinski */ 12877a844eeSJakub Kicinski struct nfp_app_bpf { 12977a844eeSJakub Kicinski struct nfp_app *app; 130bcf0cafaSJakub Kicinski struct nfp_ccm ccm; 1310d49eaf4SJakub Kicinski 132602144c2SJakub Kicinski struct bpf_offload_dev *bpf_dev; 133602144c2SJakub Kicinski 1340c9864c0SJakub Kicinski unsigned int cmsg_key_sz; 1350c9864c0SJakub Kicinski unsigned int cmsg_val_sz; 1360c9864c0SJakub Kicinski 1374da98eeaSJakub Kicinski struct list_head map_list; 1381bba4c41SJakub Kicinski unsigned int maps_in_use; 1391bba4c41SJakub Kicinski unsigned int map_elems_in_use; 1404da98eeaSJakub Kicinski 141630a4d38SJakub Kicinski struct rhashtable maps_neutral; 142630a4d38SJakub Kicinski 14328264eb2SJakub Kicinski u32 abi_version; 14428264eb2SJakub Kicinski 1450d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head { 1460d49eaf4SJakub Kicinski u32 flags; 1470d49eaf4SJakub Kicinski int off_min; 1480d49eaf4SJakub Kicinski int off_max; 1498231f844SJakub Kicinski int guaranteed_sub; 1508231f844SJakub Kicinski int guaranteed_add; 1510d49eaf4SJakub Kicinski } adjust_head; 1529d080d5dSJakub Kicinski 1539d080d5dSJakub Kicinski struct { 1549d080d5dSJakub Kicinski u32 types; 1559d080d5dSJakub Kicinski u32 max_maps; 1569d080d5dSJakub Kicinski u32 max_elems; 1579d080d5dSJakub Kicinski u32 max_key_sz; 1589d080d5dSJakub Kicinski u32 max_val_sz; 1599d080d5dSJakub Kicinski u32 max_elem_sz; 1609d080d5dSJakub Kicinski } maps; 1619d080d5dSJakub Kicinski 1629d080d5dSJakub Kicinski struct { 1639d080d5dSJakub Kicinski u32 map_lookup; 16444d65a47SJakub Kicinski u32 map_update; 165bfee64deSJakub Kicinski u32 map_delete; 1669816dd35SJakub Kicinski u32 perf_event_output; 1679d080d5dSJakub Kicinski } helpers; 168df4a37d8SJakub Kicinski 169df4a37d8SJakub Kicinski bool pseudo_random; 170d985888fSJakub Kicinski bool queue_select; 1710c261593SJakub Kicinski bool adjust_tail; 17277a844eeSJakub Kicinski }; 17377a844eeSJakub Kicinski 174dcb0c27fSJakub Kicinski enum nfp_bpf_map_use { 175dcb0c27fSJakub Kicinski NFP_MAP_UNUSED = 0, 176dcb0c27fSJakub Kicinski NFP_MAP_USE_READ, 177dcb0c27fSJakub Kicinski NFP_MAP_USE_WRITE, 178dcb0c27fSJakub Kicinski NFP_MAP_USE_ATOMIC_CNT, 179dcb0c27fSJakub Kicinski }; 180dcb0c27fSJakub Kicinski 181527db74bSJakub Kicinski struct nfp_bpf_map_word { 182527db74bSJakub Kicinski unsigned char type :4; 183527db74bSJakub Kicinski unsigned char non_zero_update :1; 184527db74bSJakub Kicinski }; 185527db74bSJakub Kicinski 1864da98eeaSJakub Kicinski /** 1874da98eeaSJakub Kicinski * struct nfp_bpf_map - private per-map data attached to BPF maps for offload 1884da98eeaSJakub Kicinski * @offmap: pointer to the offloaded BPF map 1894da98eeaSJakub Kicinski * @bpf: back pointer to bpf app private structure 1904da98eeaSJakub Kicinski * @tid: table id identifying map on datapath 1914da98eeaSJakub Kicinski * @l: link on the nfp_app_bpf->map_list list 192dcb0c27fSJakub Kicinski * @use_map: map of how the value is used (in 4B chunks) 1934da98eeaSJakub Kicinski */ 1944da98eeaSJakub Kicinski struct nfp_bpf_map { 1954da98eeaSJakub Kicinski struct bpf_offloaded_map *offmap; 1964da98eeaSJakub Kicinski struct nfp_app_bpf *bpf; 1974da98eeaSJakub Kicinski u32 tid; 1984da98eeaSJakub Kicinski struct list_head l; 199527db74bSJakub Kicinski struct nfp_bpf_map_word use_map[]; 2004da98eeaSJakub Kicinski }; 2014da98eeaSJakub Kicinski 202630a4d38SJakub Kicinski struct nfp_bpf_neutral_map { 203630a4d38SJakub Kicinski struct rhash_head l; 204630a4d38SJakub Kicinski struct bpf_map *ptr; 205ab01f4acSJakub Kicinski u32 map_id; 206630a4d38SJakub Kicinski u32 count; 207630a4d38SJakub Kicinski }; 208630a4d38SJakub Kicinski 209630a4d38SJakub Kicinski extern const struct rhashtable_params nfp_bpf_maps_neutral_params; 210630a4d38SJakub Kicinski 211d9ae7f2bSJakub Kicinski struct nfp_prog; 212d9ae7f2bSJakub Kicinski struct nfp_insn_meta; 213d9ae7f2bSJakub Kicinski typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); 214d9ae7f2bSJakub Kicinski 215d9ae7f2bSJakub Kicinski #define nfp_prog_first_meta(nfp_prog) \ 216d9ae7f2bSJakub Kicinski list_first_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 217d9ae7f2bSJakub Kicinski #define nfp_prog_last_meta(nfp_prog) \ 218d9ae7f2bSJakub Kicinski list_last_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 219d9ae7f2bSJakub Kicinski #define nfp_meta_next(meta) list_next_entry(meta, l) 220d9ae7f2bSJakub Kicinski #define nfp_meta_prev(meta) list_prev_entry(meta, l) 221d9ae7f2bSJakub Kicinski 2222f46e0c1SJakub Kicinski /** 2232f46e0c1SJakub Kicinski * struct nfp_bpf_reg_state - register state for calls 2242f46e0c1SJakub Kicinski * @reg: BPF register state from latest path 2252f46e0c1SJakub Kicinski * @var_off: for stack arg - changes stack offset on different paths 2262f46e0c1SJakub Kicinski */ 2272f46e0c1SJakub Kicinski struct nfp_bpf_reg_state { 2282f46e0c1SJakub Kicinski struct bpf_reg_state reg; 2292f46e0c1SJakub Kicinski bool var_off; 2302f46e0c1SJakub Kicinski }; 2312f46e0c1SJakub Kicinski 232a09d5c52SJiong Wang #define FLAG_INSN_IS_JUMP_DST BIT(0) 233e3b49dc6SQuentin Monnet #define FLAG_INSN_IS_SUBPROG_START BIT(1) 2347ff0ccdeSQuentin Monnet #define FLAG_INSN_PTR_CALLER_STACK_FRAME BIT(2) 23591a87a58SJakub Kicinski /* Instruction is pointless, noop even on its own */ 23691a87a58SJakub Kicinski #define FLAG_INSN_SKIP_NOOP BIT(3) 23791a87a58SJakub Kicinski /* Instruction is optimized out based on preceding instructions */ 23891a87a58SJakub Kicinski #define FLAG_INSN_SKIP_PREC_DEPENDENT BIT(4) 2399a06927eSJakub Kicinski /* Instruction is optimized by the verifier */ 2409a06927eSJakub Kicinski #define FLAG_INSN_SKIP_VERIFIER_OPT BIT(5) 2410b4de1ffSJiong Wang /* Instruction needs to zero extend to high 32-bit */ 2420b4de1ffSJiong Wang #define FLAG_INSN_DO_ZEXT BIT(6) 24391a87a58SJakub Kicinski 24491a87a58SJakub Kicinski #define FLAG_INSN_SKIP_MASK (FLAG_INSN_SKIP_NOOP | \ 2459a06927eSJakub Kicinski FLAG_INSN_SKIP_PREC_DEPENDENT | \ 2469a06927eSJakub Kicinski FLAG_INSN_SKIP_VERIFIER_OPT) 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 263bdf4c66fSQuentin Monnet * @num_insns_after_br: number of insns following a branch jump, used for fixup 26477a3d311SJakub Kicinski * @func_id: function id for call instructions 26577a3d311SJakub Kicinski * @arg1: arg1 for call instructions 26677a3d311SJakub Kicinski * @arg2: arg2 for call instructions 267662c5472SJiong Wang * @umin_src: copy of core verifier umin_value for src opearnd. 268662c5472SJiong Wang * @umax_src: copy of core verifier umax_value for src operand. 26933b94310SJiong Wang * @umin_dst: copy of core verifier umin_value for dst opearnd. 27033b94310SJiong Wang * @umax_dst: copy of core verifier umax_value for dst operand. 271d9ae7f2bSJakub Kicinski * @off: index of first generated machine instruction (in nfp_prog.prog) 272d9ae7f2bSJakub Kicinski * @n: eBPF instruction number 273a09d5c52SJiong Wang * @flags: eBPF instruction extra optimization flags 274389f263bSQuentin Monnet * @subprog_idx: index of subprogram to which the instruction belongs 275d9ae7f2bSJakub Kicinski * @double_cb: callback for second part of the instruction 276d9ae7f2bSJakub Kicinski * @l: link on nfp_prog->insns list 277d9ae7f2bSJakub Kicinski */ 278d9ae7f2bSJakub Kicinski struct nfp_insn_meta { 279d9ae7f2bSJakub Kicinski struct bpf_insn insn; 2805b674140SJiong Wang union { 28141aed09cSJakub Kicinski /* pointer ops (ld/st/xadd) */ 2825b674140SJiong Wang struct { 2832ca71441SJakub Kicinski struct bpf_reg_state ptr; 2849879a381SJiong Wang struct bpf_insn *paired_st; 2859879a381SJiong Wang s16 ldst_gather_len; 286b14157eeSJakub Kicinski bool ptr_not_const; 287be759237SJiong Wang struct { 288be759237SJiong Wang s16 range_start; 289be759237SJiong Wang s16 range_end; 290be759237SJiong Wang bool do_init; 291be759237SJiong Wang } pkt_cache; 29241aed09cSJakub Kicinski bool xadd_over_16bit; 29341aed09cSJakub Kicinski bool xadd_maybe_16bit; 2945b674140SJiong Wang }; 29541aed09cSJakub Kicinski /* jump */ 2967bdc97beSJakub Kicinski struct { 2975b674140SJiong Wang struct nfp_insn_meta *jmp_dst; 2987bdc97beSJakub Kicinski bool jump_neg_op; 299bdf4c66fSQuentin Monnet u32 num_insns_after_br; /* only for BPF-to-BPF calls */ 3007bdc97beSJakub Kicinski }; 30141aed09cSJakub Kicinski /* function calls */ 30277a3d311SJakub Kicinski struct { 30377a3d311SJakub Kicinski u32 func_id; 30477a3d311SJakub Kicinski struct bpf_reg_state arg1; 3052f46e0c1SJakub Kicinski struct nfp_bpf_reg_state arg2; 30677a3d311SJakub Kicinski }; 30733b94310SJiong Wang /* We are interested in range info for operands of ALU 30833b94310SJiong Wang * operations. For example, shift amount, multiplicand and 30933b94310SJiong Wang * multiplier etc. 310991f5b36SJiong Wang */ 311991f5b36SJiong Wang struct { 312662c5472SJiong Wang u64 umin_src; 313662c5472SJiong Wang u64 umax_src; 31433b94310SJiong Wang u64 umin_dst; 31533b94310SJiong Wang u64 umax_dst; 316991f5b36SJiong Wang }; 3175b674140SJiong Wang }; 318d9ae7f2bSJakub Kicinski unsigned int off; 319d9ae7f2bSJakub Kicinski unsigned short n; 320a09d5c52SJiong Wang unsigned short flags; 321389f263bSQuentin Monnet unsigned short subprog_idx; 322d9ae7f2bSJakub Kicinski instr_cb_t double_cb; 323d9ae7f2bSJakub Kicinski 324d9ae7f2bSJakub Kicinski struct list_head l; 325d9ae7f2bSJakub Kicinski }; 326d9ae7f2bSJakub Kicinski 327d9ae7f2bSJakub Kicinski #define BPF_SIZE_MASK 0x18 328d9ae7f2bSJakub Kicinski 329d9ae7f2bSJakub Kicinski static inline u8 mbpf_class(const struct nfp_insn_meta *meta) 330d9ae7f2bSJakub Kicinski { 331d9ae7f2bSJakub Kicinski return BPF_CLASS(meta->insn.code); 332d9ae7f2bSJakub Kicinski } 333d9ae7f2bSJakub Kicinski 334d9ae7f2bSJakub Kicinski static inline u8 mbpf_src(const struct nfp_insn_meta *meta) 335d9ae7f2bSJakub Kicinski { 336d9ae7f2bSJakub Kicinski return BPF_SRC(meta->insn.code); 337d9ae7f2bSJakub Kicinski } 338d9ae7f2bSJakub Kicinski 339d9ae7f2bSJakub Kicinski static inline u8 mbpf_op(const struct nfp_insn_meta *meta) 340d9ae7f2bSJakub Kicinski { 341d9ae7f2bSJakub Kicinski return BPF_OP(meta->insn.code); 342d9ae7f2bSJakub Kicinski } 343d9ae7f2bSJakub Kicinski 344d9ae7f2bSJakub Kicinski static inline u8 mbpf_mode(const struct nfp_insn_meta *meta) 345d9ae7f2bSJakub Kicinski { 346d9ae7f2bSJakub Kicinski return BPF_MODE(meta->insn.code); 347d9ae7f2bSJakub Kicinski } 348d9ae7f2bSJakub Kicinski 34933b94310SJiong Wang static inline bool is_mbpf_alu(const struct nfp_insn_meta *meta) 35033b94310SJiong Wang { 35133b94310SJiong Wang return mbpf_class(meta) == BPF_ALU64 || mbpf_class(meta) == BPF_ALU; 35233b94310SJiong Wang } 35333b94310SJiong Wang 3545e4d6d20SJiong Wang static inline bool is_mbpf_load(const struct nfp_insn_meta *meta) 3555e4d6d20SJiong Wang { 3565e4d6d20SJiong Wang return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_LDX | BPF_MEM); 3575e4d6d20SJiong Wang } 3585e4d6d20SJiong Wang 35946144839SJiong Wang static inline bool is_mbpf_jmp32(const struct nfp_insn_meta *meta) 36046144839SJiong Wang { 36146144839SJiong Wang return mbpf_class(meta) == BPF_JMP32; 36246144839SJiong Wang } 36346144839SJiong Wang 36446144839SJiong Wang static inline bool is_mbpf_jmp64(const struct nfp_insn_meta *meta) 36546144839SJiong Wang { 36646144839SJiong Wang return mbpf_class(meta) == BPF_JMP; 36746144839SJiong Wang } 36846144839SJiong Wang 36946144839SJiong Wang static inline bool is_mbpf_jmp(const struct nfp_insn_meta *meta) 37046144839SJiong Wang { 37146144839SJiong Wang return is_mbpf_jmp32(meta) || is_mbpf_jmp64(meta); 37246144839SJiong Wang } 37346144839SJiong Wang 3745e4d6d20SJiong Wang static inline bool is_mbpf_store(const struct nfp_insn_meta *meta) 3755e4d6d20SJiong Wang { 3765e4d6d20SJiong Wang return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_STX | BPF_MEM); 3775e4d6d20SJiong Wang } 3785e4d6d20SJiong Wang 37987b10ecdSJiong Wang static inline bool is_mbpf_load_pkt(const struct nfp_insn_meta *meta) 38087b10ecdSJiong Wang { 38187b10ecdSJiong Wang return is_mbpf_load(meta) && meta->ptr.type == PTR_TO_PACKET; 38287b10ecdSJiong Wang } 38387b10ecdSJiong Wang 38487b10ecdSJiong Wang static inline bool is_mbpf_store_pkt(const struct nfp_insn_meta *meta) 38587b10ecdSJiong Wang { 38687b10ecdSJiong Wang return is_mbpf_store(meta) && meta->ptr.type == PTR_TO_PACKET; 38787b10ecdSJiong Wang } 38887b10ecdSJiong Wang 38987b10ecdSJiong Wang static inline bool is_mbpf_classic_load(const struct nfp_insn_meta *meta) 39087b10ecdSJiong Wang { 39187b10ecdSJiong Wang u8 code = meta->insn.code; 39287b10ecdSJiong Wang 39387b10ecdSJiong Wang return BPF_CLASS(code) == BPF_LD && 39487b10ecdSJiong Wang (BPF_MODE(code) == BPF_ABS || BPF_MODE(code) == BPF_IND); 39587b10ecdSJiong Wang } 39687b10ecdSJiong Wang 39787b10ecdSJiong Wang static inline bool is_mbpf_classic_store(const struct nfp_insn_meta *meta) 39887b10ecdSJiong Wang { 39987b10ecdSJiong Wang u8 code = meta->insn.code; 40087b10ecdSJiong Wang 40187b10ecdSJiong Wang return BPF_CLASS(code) == BPF_ST && BPF_MODE(code) == BPF_MEM; 40287b10ecdSJiong Wang } 40387b10ecdSJiong Wang 40487b10ecdSJiong Wang static inline bool is_mbpf_classic_store_pkt(const struct nfp_insn_meta *meta) 40587b10ecdSJiong Wang { 40687b10ecdSJiong Wang return is_mbpf_classic_store(meta) && meta->ptr.type == PTR_TO_PACKET; 40787b10ecdSJiong Wang } 40887b10ecdSJiong Wang 409dcb0c27fSJakub Kicinski static inline bool is_mbpf_xadd(const struct nfp_insn_meta *meta) 410dcb0c27fSJakub Kicinski { 411dcb0c27fSJakub Kicinski return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_STX | BPF_XADD); 412dcb0c27fSJakub Kicinski } 413dcb0c27fSJakub Kicinski 414d3d23fdbSJiong Wang static inline bool is_mbpf_mul(const struct nfp_insn_meta *meta) 415d3d23fdbSJiong Wang { 416d3d23fdbSJiong Wang return is_mbpf_alu(meta) && mbpf_op(meta) == BPF_MUL; 417d3d23fdbSJiong Wang } 418d3d23fdbSJiong Wang 4192a952b03SJiong Wang static inline bool is_mbpf_div(const struct nfp_insn_meta *meta) 4202a952b03SJiong Wang { 4212a952b03SJiong Wang return is_mbpf_alu(meta) && mbpf_op(meta) == BPF_DIV; 4222a952b03SJiong Wang } 4232a952b03SJiong Wang 424a32014b3SJakub Kicinski static inline bool is_mbpf_cond_jump(const struct nfp_insn_meta *meta) 425a32014b3SJakub Kicinski { 426a32014b3SJakub Kicinski u8 op; 427a32014b3SJakub Kicinski 42846144839SJiong Wang if (is_mbpf_jmp32(meta)) 42946144839SJiong Wang return true; 43046144839SJiong Wang 43146144839SJiong Wang if (!is_mbpf_jmp64(meta)) 432a32014b3SJakub Kicinski return false; 433a32014b3SJakub Kicinski 43446144839SJiong Wang op = mbpf_op(meta); 435a32014b3SJakub Kicinski return op != BPF_JA && op != BPF_EXIT && op != BPF_CALL; 436a32014b3SJakub Kicinski } 437a32014b3SJakub Kicinski 438bcfdfb7cSQuentin Monnet static inline bool is_mbpf_helper_call(const struct nfp_insn_meta *meta) 439bcfdfb7cSQuentin Monnet { 440bcfdfb7cSQuentin Monnet struct bpf_insn insn = meta->insn; 441bcfdfb7cSQuentin Monnet 442bcfdfb7cSQuentin Monnet return insn.code == (BPF_JMP | BPF_CALL) && 443bcfdfb7cSQuentin Monnet insn.src_reg != BPF_PSEUDO_CALL; 444bcfdfb7cSQuentin Monnet } 445bcfdfb7cSQuentin Monnet 446389f263bSQuentin Monnet static inline bool is_mbpf_pseudo_call(const struct nfp_insn_meta *meta) 447389f263bSQuentin Monnet { 448389f263bSQuentin Monnet struct bpf_insn insn = meta->insn; 449389f263bSQuentin Monnet 450389f263bSQuentin Monnet return insn.code == (BPF_JMP | BPF_CALL) && 451389f263bSQuentin Monnet insn.src_reg == BPF_PSEUDO_CALL; 452389f263bSQuentin Monnet } 453389f263bSQuentin Monnet 454389f263bSQuentin Monnet #define STACK_FRAME_ALIGN 64 455389f263bSQuentin Monnet 456d9ae7f2bSJakub Kicinski /** 457c5da54d9SQuentin Monnet * struct nfp_bpf_subprog_info - nfp BPF sub-program (a.k.a. function) info 458c5da54d9SQuentin Monnet * @stack_depth: maximum stack depth used by this sub-program 45944549623SQuentin Monnet * @needs_reg_push: whether sub-program uses callee-saved registers 460c5da54d9SQuentin Monnet */ 461c5da54d9SQuentin Monnet struct nfp_bpf_subprog_info { 462c5da54d9SQuentin Monnet u16 stack_depth; 46344549623SQuentin Monnet u8 needs_reg_push : 1; 464c5da54d9SQuentin Monnet }; 465c5da54d9SQuentin Monnet 466c5da54d9SQuentin Monnet /** 467d9ae7f2bSJakub Kicinski * struct nfp_prog - nfp BPF program 46877a844eeSJakub Kicinski * @bpf: backpointer to the bpf app priv structure 469d9ae7f2bSJakub Kicinski * @prog: machine code 470d9ae7f2bSJakub Kicinski * @prog_len: number of valid instructions in @prog array 471d9ae7f2bSJakub Kicinski * @__prog_alloc_len: alloc size of @prog array 47244b6fed0SJakub Kicinski * @stack_size: total amount of stack used 473c6c580d7SJakub Kicinski * @verifier_meta: temporary storage for verifier's insn meta 474012bb8a8SJakub Kicinski * @type: BPF program type 475854dc87dSJiong Wang * @last_bpf_off: address of the last instruction translated from BPF 476d9ae7f2bSJakub Kicinski * @tgt_out: jump target for normal exit 477d9ae7f2bSJakub Kicinski * @tgt_abort: jump target for abort (e.g. access outside of packet buffer) 478389f263bSQuentin Monnet * @tgt_call_push_regs: jump target for subroutine for saving R6~R9 to stack 479389f263bSQuentin Monnet * @tgt_call_pop_regs: jump target for subroutine used for restoring R6~R9 480d9ae7f2bSJakub Kicinski * @n_translated: number of successfully translated instructions (for errors) 481d9ae7f2bSJakub Kicinski * @error: error code if something went wrong 4821a7e62e6SQuentin Monnet * @stack_frame_depth: max stack depth for current frame 4838231f844SJakub Kicinski * @adjust_head_location: if program has single adjust head call - the insn no. 484630a4d38SJakub Kicinski * @map_records_cnt: the number of map pointers recorded for this prog 485c5da54d9SQuentin Monnet * @subprog_cnt: number of sub-programs, including main function 486630a4d38SJakub Kicinski * @map_records: the map record pointers from bpf->maps_neutral 487c5da54d9SQuentin Monnet * @subprog: pointer to an array of objects holding info about sub-programs 488e2fc6114SJakub Kicinski * @n_insns: number of instructions on @insns list 489d9ae7f2bSJakub Kicinski * @insns: list of BPF instruction wrappers (struct nfp_insn_meta) 490d9ae7f2bSJakub Kicinski */ 491d9ae7f2bSJakub Kicinski struct nfp_prog { 49277a844eeSJakub Kicinski struct nfp_app_bpf *bpf; 49377a844eeSJakub Kicinski 494d9ae7f2bSJakub Kicinski u64 *prog; 495d9ae7f2bSJakub Kicinski unsigned int prog_len; 496d9ae7f2bSJakub Kicinski unsigned int __prog_alloc_len; 497d9ae7f2bSJakub Kicinski 49844b6fed0SJakub Kicinski unsigned int stack_size; 49944b6fed0SJakub Kicinski 500c6c580d7SJakub Kicinski struct nfp_insn_meta *verifier_meta; 501c6c580d7SJakub Kicinski 502012bb8a8SJakub Kicinski enum bpf_prog_type type; 503d9ae7f2bSJakub Kicinski 504854dc87dSJiong Wang unsigned int last_bpf_off; 505d9ae7f2bSJakub Kicinski unsigned int tgt_out; 506d9ae7f2bSJakub Kicinski unsigned int tgt_abort; 507389f263bSQuentin Monnet unsigned int tgt_call_push_regs; 508389f263bSQuentin Monnet unsigned int tgt_call_pop_regs; 509d9ae7f2bSJakub Kicinski 510d9ae7f2bSJakub Kicinski unsigned int n_translated; 511d9ae7f2bSJakub Kicinski int error; 512d9ae7f2bSJakub Kicinski 5131a7e62e6SQuentin Monnet unsigned int stack_frame_depth; 5148231f844SJakub Kicinski unsigned int adjust_head_location; 515ee9133a8SJakub Kicinski 516630a4d38SJakub Kicinski unsigned int map_records_cnt; 517c5da54d9SQuentin Monnet unsigned int subprog_cnt; 518630a4d38SJakub Kicinski struct nfp_bpf_neutral_map **map_records; 519c5da54d9SQuentin Monnet struct nfp_bpf_subprog_info *subprog; 520630a4d38SJakub Kicinski 521e2fc6114SJakub Kicinski unsigned int n_insns; 522d9ae7f2bSJakub Kicinski struct list_head insns; 523d9ae7f2bSJakub Kicinski }; 524d9ae7f2bSJakub Kicinski 525d3f89b98SJakub Kicinski /** 526d3f89b98SJakub Kicinski * struct nfp_bpf_vnic - per-vNIC BPF priv structure 527d3f89b98SJakub Kicinski * @tc_prog: currently loaded cls_bpf program 5282314fe9eSJakub Kicinski * @start_off: address of the first instruction in the memory 5292314fe9eSJakub Kicinski * @tgt_done: jump target to get the next packet 530d3f89b98SJakub Kicinski */ 531d3f89b98SJakub Kicinski struct nfp_bpf_vnic { 532d3f89b98SJakub Kicinski struct bpf_prog *tc_prog; 5332314fe9eSJakub Kicinski unsigned int start_off; 5342314fe9eSJakub Kicinski unsigned int tgt_done; 535d3f89b98SJakub Kicinski }; 536d3f89b98SJakub Kicinski 537389f263bSQuentin Monnet bool nfp_is_subprog_start(struct nfp_insn_meta *meta); 538e2fc6114SJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog); 539c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *prog); 54074801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code); 541d9ae7f2bSJakub Kicinski 5421da6f573SQuentin Monnet int nfp_verify_insn(struct bpf_verifier_env *env, int insn_idx, 5431da6f573SQuentin Monnet int prev_insn_idx); 5441da6f573SQuentin Monnet int nfp_bpf_finalize(struct bpf_verifier_env *env); 5451da6f573SQuentin Monnet 546a32014b3SJakub Kicinski int nfp_bpf_opt_replace_insn(struct bpf_verifier_env *env, u32 off, 547a32014b3SJakub Kicinski struct bpf_insn *insn); 5489a06927eSJakub Kicinski int nfp_bpf_opt_remove_insns(struct bpf_verifier_env *env, u32 off, u32 cnt); 549a32014b3SJakub Kicinski 5501385d755SQuentin Monnet extern const struct bpf_prog_offload_ops nfp_bpf_dev_ops; 551d9ae7f2bSJakub Kicinski 552c6c580d7SJakub Kicinski struct netdev_bpf; 553c6c580d7SJakub Kicinski struct nfp_app; 554bb45e51cSJakub Kicinski struct nfp_net; 555bb45e51cSJakub Kicinski 556af93d15aSJakub Kicinski int nfp_ndo_bpf(struct nfp_app *app, struct nfp_net *nn, 557af93d15aSJakub Kicinski struct netdev_bpf *bpf); 5589ce7a956SJakub Kicinski int nfp_net_bpf_offload(struct nfp_net *nn, struct bpf_prog *prog, 55952be9a7cSQuentin Monnet bool old_prog, struct netlink_ext_ack *extack); 560bb45e51cSJakub Kicinski 5615b674140SJiong Wang struct nfp_insn_meta * 5625b674140SJiong Wang nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 563e2fc6114SJakub Kicinski unsigned int insn_idx); 5642314fe9eSJakub Kicinski 5652314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv); 566d48ae231SJakub Kicinski 567bc2796dbSJakub Kicinski unsigned int nfp_bpf_ctrl_cmsg_min_mtu(struct nfp_app_bpf *bpf); 5680c9864c0SJakub Kicinski unsigned int nfp_bpf_ctrl_cmsg_mtu(struct nfp_app_bpf *bpf); 569ff3d43f7SJakub Kicinski long long int 570ff3d43f7SJakub Kicinski nfp_bpf_ctrl_alloc_map(struct nfp_app_bpf *bpf, struct bpf_map *map); 571ff3d43f7SJakub Kicinski void 572ff3d43f7SJakub Kicinski nfp_bpf_ctrl_free_map(struct nfp_app_bpf *bpf, struct nfp_bpf_map *nfp_map); 573ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_getfirst_entry(struct bpf_offloaded_map *offmap, 574ff3d43f7SJakub Kicinski void *next_key); 575ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_update_entry(struct bpf_offloaded_map *offmap, 576ff3d43f7SJakub Kicinski void *key, void *value, u64 flags); 577ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_del_entry(struct bpf_offloaded_map *offmap, void *key); 578ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_lookup_entry(struct bpf_offloaded_map *offmap, 579ff3d43f7SJakub Kicinski void *key, void *value); 580ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_getnext_entry(struct bpf_offloaded_map *offmap, 581ff3d43f7SJakub Kicinski void *key, void *next_key); 582ff3d43f7SJakub Kicinski 58320c54204SJakub Kicinski int nfp_bpf_event_output(struct nfp_app_bpf *bpf, const void *data, 58420c54204SJakub Kicinski unsigned int len); 5859816dd35SJakub Kicinski 586d48ae231SJakub Kicinski void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb); 58709587627SJakub Kicinski void 58809587627SJakub Kicinski nfp_bpf_ctrl_msg_rx_raw(struct nfp_app *app, const void *data, 58909587627SJakub Kicinski unsigned int len); 590d9ae7f2bSJakub Kicinski #endif 591