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 17b3f868dfSJakub Kicinski #include "../nfp_asm.h" 18d48ae231SJakub Kicinski #include "fw.h" 19c66a9cf4SJakub Kicinski 20ab01f4acSJakub Kicinski #define cmsg_warn(bpf, msg...) nn_dp_warn(&(bpf)->app->ctrl->dp, msg) 21ab01f4acSJakub Kicinski 222314fe9eSJakub Kicinski /* For relocation logic use up-most byte of branch instruction as scratch 23d9ae7f2bSJakub Kicinski * area. Remember to clear this before sending instructions to HW! 24d9ae7f2bSJakub Kicinski */ 252314fe9eSJakub Kicinski #define OP_RELO_TYPE 0xff00000000000000ULL 26d9ae7f2bSJakub Kicinski 272314fe9eSJakub Kicinski enum nfp_relo_type { 282314fe9eSJakub Kicinski RELO_NONE = 0, 292314fe9eSJakub Kicinski /* standard internal jumps */ 302314fe9eSJakub Kicinski RELO_BR_REL, 312314fe9eSJakub Kicinski /* internal jumps to parts of the outro */ 322314fe9eSJakub Kicinski RELO_BR_GO_OUT, 332314fe9eSJakub Kicinski RELO_BR_GO_ABORT, 34389f263bSQuentin Monnet RELO_BR_GO_CALL_PUSH_REGS, 35389f263bSQuentin Monnet RELO_BR_GO_CALL_POP_REGS, 362314fe9eSJakub Kicinski /* external jumps to fixed addresses */ 372314fe9eSJakub Kicinski RELO_BR_NEXT_PKT, 3877a3d311SJakub Kicinski RELO_BR_HELPER, 3977a3d311SJakub Kicinski /* immediate relocation against load address */ 4077a3d311SJakub Kicinski RELO_IMMED_REL, 41d9ae7f2bSJakub Kicinski }; 42d9ae7f2bSJakub Kicinski 43e84797feSJakub Kicinski /* To make absolute relocated branches (branches other than RELO_BR_REL) 44e84797feSJakub Kicinski * distinguishable in user space dumps from normal jumps, add a large offset 45e84797feSJakub Kicinski * to them. 46e84797feSJakub Kicinski */ 47e84797feSJakub Kicinski #define BR_OFF_RELO 15000 48e84797feSJakub Kicinski 49d9ae7f2bSJakub Kicinski enum static_regs { 50dcb0c27fSJakub Kicinski STATIC_REG_IMMA = 20, /* Bank AB */ 5118e53b6cSJakub Kicinski STATIC_REG_IMM = 21, /* Bank AB */ 52d3488480SJakub Kicinski STATIC_REG_STACK = 22, /* Bank A */ 5318e53b6cSJakub Kicinski STATIC_REG_PKT_LEN = 22, /* Bank B */ 5418e53b6cSJakub Kicinski }; 5518e53b6cSJakub Kicinski 5618e53b6cSJakub Kicinski enum pkt_vec { 5718e53b6cSJakub Kicinski PKT_VEC_PKT_LEN = 0, 5818e53b6cSJakub Kicinski PKT_VEC_PKT_PTR = 2, 59d985888fSJakub Kicinski PKT_VEC_QSEL_SET = 4, 60d985888fSJakub Kicinski PKT_VEC_QSEL_VAL = 6, 61d9ae7f2bSJakub Kicinski }; 62d9ae7f2bSJakub Kicinski 63d985888fSJakub Kicinski #define PKT_VEL_QSEL_SET_BIT 4 64d985888fSJakub Kicinski 6518e53b6cSJakub Kicinski #define pv_len(np) reg_lm(1, PKT_VEC_PKT_LEN) 6618e53b6cSJakub Kicinski #define pv_ctm_ptr(np) reg_lm(1, PKT_VEC_PKT_PTR) 67d985888fSJakub Kicinski #define pv_qsel_set(np) reg_lm(1, PKT_VEC_QSEL_SET) 68d985888fSJakub Kicinski #define pv_qsel_val(np) reg_lm(1, PKT_VEC_QSEL_VAL) 6918e53b6cSJakub Kicinski 70d3488480SJakub Kicinski #define stack_reg(np) reg_a(STATIC_REG_STACK) 71d3488480SJakub Kicinski #define stack_imm(np) imm_b(np) 7218e53b6cSJakub Kicinski #define plen_reg(np) reg_b(STATIC_REG_PKT_LEN) 7318e53b6cSJakub Kicinski #define pptr_reg(np) pv_ctm_ptr(np) 7418e53b6cSJakub Kicinski #define imm_a(np) reg_a(STATIC_REG_IMM) 7518e53b6cSJakub Kicinski #define imm_b(np) reg_b(STATIC_REG_IMM) 76dcb0c27fSJakub Kicinski #define imma_a(np) reg_a(STATIC_REG_IMMA) 77dcb0c27fSJakub Kicinski #define imma_b(np) reg_b(STATIC_REG_IMMA) 7818e53b6cSJakub Kicinski #define imm_both(np) reg_both(STATIC_REG_IMM) 79389f263bSQuentin Monnet #define ret_reg(np) imm_a(np) 80d9ae7f2bSJakub Kicinski 81509144e2SJakub Kicinski #define NFP_BPF_ABI_FLAGS reg_imm(0) 82d9ae7f2bSJakub Kicinski #define NFP_BPF_ABI_FLAG_MARK 1 83d9ae7f2bSJakub Kicinski 8477a844eeSJakub Kicinski /** 8577a844eeSJakub Kicinski * struct nfp_app_bpf - bpf app priv structure 8677a844eeSJakub Kicinski * @app: backpointer to the app 870d49eaf4SJakub Kicinski * 88602144c2SJakub Kicinski * @bpf_dev: BPF offload device handle 89602144c2SJakub Kicinski * 90d48ae231SJakub Kicinski * @tag_allocator: bitmap of control message tags in use 91d48ae231SJakub Kicinski * @tag_alloc_next: next tag bit to allocate 92d48ae231SJakub Kicinski * @tag_alloc_last: next tag bit to be freed 93d48ae231SJakub Kicinski * 94d48ae231SJakub Kicinski * @cmsg_replies: received cmsg replies waiting to be consumed 95d48ae231SJakub Kicinski * @cmsg_wq: work queue for waiting for cmsg replies 96d48ae231SJakub Kicinski * 970c9864c0SJakub Kicinski * @cmsg_key_sz: size of key in cmsg element array 980c9864c0SJakub Kicinski * @cmsg_val_sz: size of value in cmsg element array 990c9864c0SJakub Kicinski * 1004da98eeaSJakub Kicinski * @map_list: list of offloaded maps 1011bba4c41SJakub Kicinski * @maps_in_use: number of currently offloaded maps 1021bba4c41SJakub Kicinski * @map_elems_in_use: number of elements allocated to offloaded maps 1034da98eeaSJakub Kicinski * 104630a4d38SJakub Kicinski * @maps_neutral: hash table of offload-neutral maps (on pointer) 105630a4d38SJakub Kicinski * 10628264eb2SJakub Kicinski * @abi_version: global BPF ABI version 10728264eb2SJakub Kicinski * 1080d49eaf4SJakub Kicinski * @adjust_head: adjust head capability 109703f578aSJakub Kicinski * @adjust_head.flags: extra flags for adjust head 110703f578aSJakub Kicinski * @adjust_head.off_min: minimal packet offset within buffer required 111703f578aSJakub Kicinski * @adjust_head.off_max: maximum packet offset within buffer required 112703f578aSJakub Kicinski * @adjust_head.guaranteed_sub: negative adjustment guaranteed possible 113703f578aSJakub Kicinski * @adjust_head.guaranteed_add: positive adjustment guaranteed possible 1149d080d5dSJakub Kicinski * 1159d080d5dSJakub Kicinski * @maps: map capability 116703f578aSJakub Kicinski * @maps.types: supported map types 117703f578aSJakub Kicinski * @maps.max_maps: max number of maps supported 118703f578aSJakub Kicinski * @maps.max_elems: max number of entries in each map 119703f578aSJakub Kicinski * @maps.max_key_sz: max size of map key 120703f578aSJakub Kicinski * @maps.max_val_sz: max size of map value 121703f578aSJakub Kicinski * @maps.max_elem_sz: max size of map entry (key + value) 1229d080d5dSJakub Kicinski * 1239d080d5dSJakub Kicinski * @helpers: helper addressess for various calls 124703f578aSJakub Kicinski * @helpers.map_lookup: map lookup helper address 12544d65a47SJakub Kicinski * @helpers.map_update: map update helper address 126bfee64deSJakub Kicinski * @helpers.map_delete: map delete helper address 1279816dd35SJakub Kicinski * @helpers.perf_event_output: output perf event to a ring buffer 128df4a37d8SJakub Kicinski * 129df4a37d8SJakub Kicinski * @pseudo_random: FW initialized the pseudo-random machinery (CSRs) 130d985888fSJakub Kicinski * @queue_select: BPF can set the RX queue ID in packet vector 1310c261593SJakub Kicinski * @adjust_tail: BPF can simply trunc packet size for adjust tail 13277a844eeSJakub Kicinski */ 13377a844eeSJakub Kicinski struct nfp_app_bpf { 13477a844eeSJakub Kicinski struct nfp_app *app; 1350d49eaf4SJakub Kicinski 136602144c2SJakub Kicinski struct bpf_offload_dev *bpf_dev; 137602144c2SJakub Kicinski 138d48ae231SJakub Kicinski DECLARE_BITMAP(tag_allocator, U16_MAX + 1); 139d48ae231SJakub Kicinski u16 tag_alloc_next; 140d48ae231SJakub Kicinski u16 tag_alloc_last; 141d48ae231SJakub Kicinski 142d48ae231SJakub Kicinski struct sk_buff_head cmsg_replies; 143d48ae231SJakub Kicinski struct wait_queue_head cmsg_wq; 144d48ae231SJakub Kicinski 1450c9864c0SJakub Kicinski unsigned int cmsg_key_sz; 1460c9864c0SJakub Kicinski unsigned int cmsg_val_sz; 1470c9864c0SJakub Kicinski 1484da98eeaSJakub Kicinski struct list_head map_list; 1491bba4c41SJakub Kicinski unsigned int maps_in_use; 1501bba4c41SJakub Kicinski unsigned int map_elems_in_use; 1514da98eeaSJakub Kicinski 152630a4d38SJakub Kicinski struct rhashtable maps_neutral; 153630a4d38SJakub Kicinski 15428264eb2SJakub Kicinski u32 abi_version; 15528264eb2SJakub Kicinski 1560d49eaf4SJakub Kicinski struct nfp_bpf_cap_adjust_head { 1570d49eaf4SJakub Kicinski u32 flags; 1580d49eaf4SJakub Kicinski int off_min; 1590d49eaf4SJakub Kicinski int off_max; 1608231f844SJakub Kicinski int guaranteed_sub; 1618231f844SJakub Kicinski int guaranteed_add; 1620d49eaf4SJakub Kicinski } adjust_head; 1639d080d5dSJakub Kicinski 1649d080d5dSJakub Kicinski struct { 1659d080d5dSJakub Kicinski u32 types; 1669d080d5dSJakub Kicinski u32 max_maps; 1679d080d5dSJakub Kicinski u32 max_elems; 1689d080d5dSJakub Kicinski u32 max_key_sz; 1699d080d5dSJakub Kicinski u32 max_val_sz; 1709d080d5dSJakub Kicinski u32 max_elem_sz; 1719d080d5dSJakub Kicinski } maps; 1729d080d5dSJakub Kicinski 1739d080d5dSJakub Kicinski struct { 1749d080d5dSJakub Kicinski u32 map_lookup; 17544d65a47SJakub Kicinski u32 map_update; 176bfee64deSJakub Kicinski u32 map_delete; 1779816dd35SJakub Kicinski u32 perf_event_output; 1789d080d5dSJakub Kicinski } helpers; 179df4a37d8SJakub Kicinski 180df4a37d8SJakub Kicinski bool pseudo_random; 181d985888fSJakub Kicinski bool queue_select; 1820c261593SJakub Kicinski bool adjust_tail; 18377a844eeSJakub Kicinski }; 18477a844eeSJakub Kicinski 185dcb0c27fSJakub Kicinski enum nfp_bpf_map_use { 186dcb0c27fSJakub Kicinski NFP_MAP_UNUSED = 0, 187dcb0c27fSJakub Kicinski NFP_MAP_USE_READ, 188dcb0c27fSJakub Kicinski NFP_MAP_USE_WRITE, 189dcb0c27fSJakub Kicinski NFP_MAP_USE_ATOMIC_CNT, 190dcb0c27fSJakub Kicinski }; 191dcb0c27fSJakub Kicinski 192527db74bSJakub Kicinski struct nfp_bpf_map_word { 193527db74bSJakub Kicinski unsigned char type :4; 194527db74bSJakub Kicinski unsigned char non_zero_update :1; 195527db74bSJakub Kicinski }; 196527db74bSJakub Kicinski 1974da98eeaSJakub Kicinski /** 1984da98eeaSJakub Kicinski * struct nfp_bpf_map - private per-map data attached to BPF maps for offload 1994da98eeaSJakub Kicinski * @offmap: pointer to the offloaded BPF map 2004da98eeaSJakub Kicinski * @bpf: back pointer to bpf app private structure 2014da98eeaSJakub Kicinski * @tid: table id identifying map on datapath 2024da98eeaSJakub Kicinski * @l: link on the nfp_app_bpf->map_list list 203dcb0c27fSJakub Kicinski * @use_map: map of how the value is used (in 4B chunks) 2044da98eeaSJakub Kicinski */ 2054da98eeaSJakub Kicinski struct nfp_bpf_map { 2064da98eeaSJakub Kicinski struct bpf_offloaded_map *offmap; 2074da98eeaSJakub Kicinski struct nfp_app_bpf *bpf; 2084da98eeaSJakub Kicinski u32 tid; 2094da98eeaSJakub Kicinski struct list_head l; 210527db74bSJakub Kicinski struct nfp_bpf_map_word use_map[]; 2114da98eeaSJakub Kicinski }; 2124da98eeaSJakub Kicinski 213630a4d38SJakub Kicinski struct nfp_bpf_neutral_map { 214630a4d38SJakub Kicinski struct rhash_head l; 215630a4d38SJakub Kicinski struct bpf_map *ptr; 216ab01f4acSJakub Kicinski u32 map_id; 217630a4d38SJakub Kicinski u32 count; 218630a4d38SJakub Kicinski }; 219630a4d38SJakub Kicinski 220630a4d38SJakub Kicinski extern const struct rhashtable_params nfp_bpf_maps_neutral_params; 221630a4d38SJakub Kicinski 222d9ae7f2bSJakub Kicinski struct nfp_prog; 223d9ae7f2bSJakub Kicinski struct nfp_insn_meta; 224d9ae7f2bSJakub Kicinski typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); 225d9ae7f2bSJakub Kicinski 226d9ae7f2bSJakub Kicinski #define nfp_prog_first_meta(nfp_prog) \ 227d9ae7f2bSJakub Kicinski list_first_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 228d9ae7f2bSJakub Kicinski #define nfp_prog_last_meta(nfp_prog) \ 229d9ae7f2bSJakub Kicinski list_last_entry(&(nfp_prog)->insns, struct nfp_insn_meta, l) 230d9ae7f2bSJakub Kicinski #define nfp_meta_next(meta) list_next_entry(meta, l) 231d9ae7f2bSJakub Kicinski #define nfp_meta_prev(meta) list_prev_entry(meta, l) 232d9ae7f2bSJakub Kicinski 2332f46e0c1SJakub Kicinski /** 2342f46e0c1SJakub Kicinski * struct nfp_bpf_reg_state - register state for calls 2352f46e0c1SJakub Kicinski * @reg: BPF register state from latest path 2362f46e0c1SJakub Kicinski * @var_off: for stack arg - changes stack offset on different paths 2372f46e0c1SJakub Kicinski */ 2382f46e0c1SJakub Kicinski struct nfp_bpf_reg_state { 2392f46e0c1SJakub Kicinski struct bpf_reg_state reg; 2402f46e0c1SJakub Kicinski bool var_off; 2412f46e0c1SJakub Kicinski }; 2422f46e0c1SJakub Kicinski 243a09d5c52SJiong Wang #define FLAG_INSN_IS_JUMP_DST BIT(0) 244e3b49dc6SQuentin Monnet #define FLAG_INSN_IS_SUBPROG_START BIT(1) 2457ff0ccdeSQuentin Monnet #define FLAG_INSN_PTR_CALLER_STACK_FRAME BIT(2) 24691a87a58SJakub Kicinski /* Instruction is pointless, noop even on its own */ 24791a87a58SJakub Kicinski #define FLAG_INSN_SKIP_NOOP BIT(3) 24891a87a58SJakub Kicinski /* Instruction is optimized out based on preceding instructions */ 24991a87a58SJakub Kicinski #define FLAG_INSN_SKIP_PREC_DEPENDENT BIT(4) 2509a06927eSJakub Kicinski /* Instruction is optimized by the verifier */ 2519a06927eSJakub Kicinski #define FLAG_INSN_SKIP_VERIFIER_OPT BIT(5) 25291a87a58SJakub Kicinski 25391a87a58SJakub Kicinski #define FLAG_INSN_SKIP_MASK (FLAG_INSN_SKIP_NOOP | \ 2549a06927eSJakub Kicinski FLAG_INSN_SKIP_PREC_DEPENDENT | \ 2559a06927eSJakub Kicinski FLAG_INSN_SKIP_VERIFIER_OPT) 256a09d5c52SJiong Wang 257d9ae7f2bSJakub Kicinski /** 258d9ae7f2bSJakub Kicinski * struct nfp_insn_meta - BPF instruction wrapper 259d9ae7f2bSJakub Kicinski * @insn: BPF instruction 2602ca71441SJakub Kicinski * @ptr: pointer type for memory operations 2619879a381SJiong Wang * @ldst_gather_len: memcpy length gathered from load/store sequence 2629879a381SJiong Wang * @paired_st: the paired store insn at the head of the sequence 263b14157eeSJakub Kicinski * @ptr_not_const: pointer is not always constant 264be759237SJiong Wang * @pkt_cache: packet data cache information 265be759237SJiong Wang * @pkt_cache.range_start: start offset for associated packet data cache 266be759237SJiong Wang * @pkt_cache.range_end: end offset for associated packet data cache 267be759237SJiong Wang * @pkt_cache.do_init: this read needs to initialize packet data cache 26841aed09cSJakub Kicinski * @xadd_over_16bit: 16bit immediate is not guaranteed 26941aed09cSJakub Kicinski * @xadd_maybe_16bit: 16bit immediate is possible 2705b674140SJiong Wang * @jmp_dst: destination info for jump instructions 2717bdc97beSJakub Kicinski * @jump_neg_op: jump instruction has inverted immediate, use ADD instead of SUB 272bdf4c66fSQuentin Monnet * @num_insns_after_br: number of insns following a branch jump, used for fixup 27377a3d311SJakub Kicinski * @func_id: function id for call instructions 27477a3d311SJakub Kicinski * @arg1: arg1 for call instructions 27577a3d311SJakub Kicinski * @arg2: arg2 for call instructions 276662c5472SJiong Wang * @umin_src: copy of core verifier umin_value for src opearnd. 277662c5472SJiong Wang * @umax_src: copy of core verifier umax_value for src operand. 27833b94310SJiong Wang * @umin_dst: copy of core verifier umin_value for dst opearnd. 27933b94310SJiong Wang * @umax_dst: copy of core verifier umax_value for dst operand. 280d9ae7f2bSJakub Kicinski * @off: index of first generated machine instruction (in nfp_prog.prog) 281d9ae7f2bSJakub Kicinski * @n: eBPF instruction number 282a09d5c52SJiong Wang * @flags: eBPF instruction extra optimization flags 283389f263bSQuentin Monnet * @subprog_idx: index of subprogram to which the instruction belongs 284d9ae7f2bSJakub Kicinski * @double_cb: callback for second part of the instruction 285d9ae7f2bSJakub Kicinski * @l: link on nfp_prog->insns list 286d9ae7f2bSJakub Kicinski */ 287d9ae7f2bSJakub Kicinski struct nfp_insn_meta { 288d9ae7f2bSJakub Kicinski struct bpf_insn insn; 2895b674140SJiong Wang union { 29041aed09cSJakub Kicinski /* pointer ops (ld/st/xadd) */ 2915b674140SJiong Wang struct { 2922ca71441SJakub Kicinski struct bpf_reg_state ptr; 2939879a381SJiong Wang struct bpf_insn *paired_st; 2949879a381SJiong Wang s16 ldst_gather_len; 295b14157eeSJakub Kicinski bool ptr_not_const; 296be759237SJiong Wang struct { 297be759237SJiong Wang s16 range_start; 298be759237SJiong Wang s16 range_end; 299be759237SJiong Wang bool do_init; 300be759237SJiong Wang } pkt_cache; 30141aed09cSJakub Kicinski bool xadd_over_16bit; 30241aed09cSJakub Kicinski bool xadd_maybe_16bit; 3035b674140SJiong Wang }; 30441aed09cSJakub Kicinski /* jump */ 3057bdc97beSJakub Kicinski struct { 3065b674140SJiong Wang struct nfp_insn_meta *jmp_dst; 3077bdc97beSJakub Kicinski bool jump_neg_op; 308bdf4c66fSQuentin Monnet u32 num_insns_after_br; /* only for BPF-to-BPF calls */ 3097bdc97beSJakub Kicinski }; 31041aed09cSJakub Kicinski /* function calls */ 31177a3d311SJakub Kicinski struct { 31277a3d311SJakub Kicinski u32 func_id; 31377a3d311SJakub Kicinski struct bpf_reg_state arg1; 3142f46e0c1SJakub Kicinski struct nfp_bpf_reg_state arg2; 31577a3d311SJakub Kicinski }; 31633b94310SJiong Wang /* We are interested in range info for operands of ALU 31733b94310SJiong Wang * operations. For example, shift amount, multiplicand and 31833b94310SJiong Wang * multiplier etc. 319991f5b36SJiong Wang */ 320991f5b36SJiong Wang struct { 321662c5472SJiong Wang u64 umin_src; 322662c5472SJiong Wang u64 umax_src; 32333b94310SJiong Wang u64 umin_dst; 32433b94310SJiong Wang u64 umax_dst; 325991f5b36SJiong Wang }; 3265b674140SJiong Wang }; 327d9ae7f2bSJakub Kicinski unsigned int off; 328d9ae7f2bSJakub Kicinski unsigned short n; 329a09d5c52SJiong Wang unsigned short flags; 330389f263bSQuentin Monnet unsigned short subprog_idx; 331d9ae7f2bSJakub Kicinski instr_cb_t double_cb; 332d9ae7f2bSJakub Kicinski 333d9ae7f2bSJakub Kicinski struct list_head l; 334d9ae7f2bSJakub Kicinski }; 335d9ae7f2bSJakub Kicinski 336d9ae7f2bSJakub Kicinski #define BPF_SIZE_MASK 0x18 337d9ae7f2bSJakub Kicinski 338d9ae7f2bSJakub Kicinski static inline u8 mbpf_class(const struct nfp_insn_meta *meta) 339d9ae7f2bSJakub Kicinski { 340d9ae7f2bSJakub Kicinski return BPF_CLASS(meta->insn.code); 341d9ae7f2bSJakub Kicinski } 342d9ae7f2bSJakub Kicinski 343d9ae7f2bSJakub Kicinski static inline u8 mbpf_src(const struct nfp_insn_meta *meta) 344d9ae7f2bSJakub Kicinski { 345d9ae7f2bSJakub Kicinski return BPF_SRC(meta->insn.code); 346d9ae7f2bSJakub Kicinski } 347d9ae7f2bSJakub Kicinski 348d9ae7f2bSJakub Kicinski static inline u8 mbpf_op(const struct nfp_insn_meta *meta) 349d9ae7f2bSJakub Kicinski { 350d9ae7f2bSJakub Kicinski return BPF_OP(meta->insn.code); 351d9ae7f2bSJakub Kicinski } 352d9ae7f2bSJakub Kicinski 353d9ae7f2bSJakub Kicinski static inline u8 mbpf_mode(const struct nfp_insn_meta *meta) 354d9ae7f2bSJakub Kicinski { 355d9ae7f2bSJakub Kicinski return BPF_MODE(meta->insn.code); 356d9ae7f2bSJakub Kicinski } 357d9ae7f2bSJakub Kicinski 35833b94310SJiong Wang static inline bool is_mbpf_alu(const struct nfp_insn_meta *meta) 35933b94310SJiong Wang { 36033b94310SJiong Wang return mbpf_class(meta) == BPF_ALU64 || mbpf_class(meta) == BPF_ALU; 36133b94310SJiong Wang } 36233b94310SJiong Wang 3635e4d6d20SJiong Wang static inline bool is_mbpf_load(const struct nfp_insn_meta *meta) 3645e4d6d20SJiong Wang { 3655e4d6d20SJiong Wang return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_LDX | BPF_MEM); 3665e4d6d20SJiong Wang } 3675e4d6d20SJiong Wang 3685e4d6d20SJiong Wang static inline bool is_mbpf_store(const struct nfp_insn_meta *meta) 3695e4d6d20SJiong Wang { 3705e4d6d20SJiong Wang return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_STX | BPF_MEM); 3715e4d6d20SJiong Wang } 3725e4d6d20SJiong Wang 37387b10ecdSJiong Wang static inline bool is_mbpf_load_pkt(const struct nfp_insn_meta *meta) 37487b10ecdSJiong Wang { 37587b10ecdSJiong Wang return is_mbpf_load(meta) && meta->ptr.type == PTR_TO_PACKET; 37687b10ecdSJiong Wang } 37787b10ecdSJiong Wang 37887b10ecdSJiong Wang static inline bool is_mbpf_store_pkt(const struct nfp_insn_meta *meta) 37987b10ecdSJiong Wang { 38087b10ecdSJiong Wang return is_mbpf_store(meta) && meta->ptr.type == PTR_TO_PACKET; 38187b10ecdSJiong Wang } 38287b10ecdSJiong Wang 38387b10ecdSJiong Wang static inline bool is_mbpf_classic_load(const struct nfp_insn_meta *meta) 38487b10ecdSJiong Wang { 38587b10ecdSJiong Wang u8 code = meta->insn.code; 38687b10ecdSJiong Wang 38787b10ecdSJiong Wang return BPF_CLASS(code) == BPF_LD && 38887b10ecdSJiong Wang (BPF_MODE(code) == BPF_ABS || BPF_MODE(code) == BPF_IND); 38987b10ecdSJiong Wang } 39087b10ecdSJiong Wang 39187b10ecdSJiong Wang static inline bool is_mbpf_classic_store(const struct nfp_insn_meta *meta) 39287b10ecdSJiong Wang { 39387b10ecdSJiong Wang u8 code = meta->insn.code; 39487b10ecdSJiong Wang 39587b10ecdSJiong Wang return BPF_CLASS(code) == BPF_ST && BPF_MODE(code) == BPF_MEM; 39687b10ecdSJiong Wang } 39787b10ecdSJiong Wang 39887b10ecdSJiong Wang static inline bool is_mbpf_classic_store_pkt(const struct nfp_insn_meta *meta) 39987b10ecdSJiong Wang { 40087b10ecdSJiong Wang return is_mbpf_classic_store(meta) && meta->ptr.type == PTR_TO_PACKET; 40187b10ecdSJiong Wang } 40287b10ecdSJiong Wang 403dcb0c27fSJakub Kicinski static inline bool is_mbpf_xadd(const struct nfp_insn_meta *meta) 404dcb0c27fSJakub Kicinski { 405dcb0c27fSJakub Kicinski return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_STX | BPF_XADD); 406dcb0c27fSJakub Kicinski } 407dcb0c27fSJakub Kicinski 408d3d23fdbSJiong Wang static inline bool is_mbpf_mul(const struct nfp_insn_meta *meta) 409d3d23fdbSJiong Wang { 410d3d23fdbSJiong Wang return is_mbpf_alu(meta) && mbpf_op(meta) == BPF_MUL; 411d3d23fdbSJiong Wang } 412d3d23fdbSJiong Wang 4132a952b03SJiong Wang static inline bool is_mbpf_div(const struct nfp_insn_meta *meta) 4142a952b03SJiong Wang { 4152a952b03SJiong Wang return is_mbpf_alu(meta) && mbpf_op(meta) == BPF_DIV; 4162a952b03SJiong Wang } 4172a952b03SJiong Wang 418a32014b3SJakub Kicinski static inline bool is_mbpf_cond_jump(const struct nfp_insn_meta *meta) 419a32014b3SJakub Kicinski { 420a32014b3SJakub Kicinski u8 op; 421a32014b3SJakub Kicinski 422a32014b3SJakub Kicinski if (BPF_CLASS(meta->insn.code) != BPF_JMP) 423a32014b3SJakub Kicinski return false; 424a32014b3SJakub Kicinski 425a32014b3SJakub Kicinski op = BPF_OP(meta->insn.code); 426a32014b3SJakub Kicinski return op != BPF_JA && op != BPF_EXIT && op != BPF_CALL; 427a32014b3SJakub Kicinski } 428a32014b3SJakub Kicinski 429bcfdfb7cSQuentin Monnet static inline bool is_mbpf_helper_call(const struct nfp_insn_meta *meta) 430bcfdfb7cSQuentin Monnet { 431bcfdfb7cSQuentin Monnet struct bpf_insn insn = meta->insn; 432bcfdfb7cSQuentin Monnet 433bcfdfb7cSQuentin Monnet return insn.code == (BPF_JMP | BPF_CALL) && 434bcfdfb7cSQuentin Monnet insn.src_reg != BPF_PSEUDO_CALL; 435bcfdfb7cSQuentin Monnet } 436bcfdfb7cSQuentin Monnet 437389f263bSQuentin Monnet static inline bool is_mbpf_pseudo_call(const struct nfp_insn_meta *meta) 438389f263bSQuentin Monnet { 439389f263bSQuentin Monnet struct bpf_insn insn = meta->insn; 440389f263bSQuentin Monnet 441389f263bSQuentin Monnet return insn.code == (BPF_JMP | BPF_CALL) && 442389f263bSQuentin Monnet insn.src_reg == BPF_PSEUDO_CALL; 443389f263bSQuentin Monnet } 444389f263bSQuentin Monnet 445389f263bSQuentin Monnet #define STACK_FRAME_ALIGN 64 446389f263bSQuentin Monnet 447d9ae7f2bSJakub Kicinski /** 448c5da54d9SQuentin Monnet * struct nfp_bpf_subprog_info - nfp BPF sub-program (a.k.a. function) info 449c5da54d9SQuentin Monnet * @stack_depth: maximum stack depth used by this sub-program 45044549623SQuentin Monnet * @needs_reg_push: whether sub-program uses callee-saved registers 451c5da54d9SQuentin Monnet */ 452c5da54d9SQuentin Monnet struct nfp_bpf_subprog_info { 453c5da54d9SQuentin Monnet u16 stack_depth; 45444549623SQuentin Monnet u8 needs_reg_push : 1; 455c5da54d9SQuentin Monnet }; 456c5da54d9SQuentin Monnet 457c5da54d9SQuentin Monnet /** 458d9ae7f2bSJakub Kicinski * struct nfp_prog - nfp BPF program 45977a844eeSJakub Kicinski * @bpf: backpointer to the bpf app priv structure 460d9ae7f2bSJakub Kicinski * @prog: machine code 461d9ae7f2bSJakub Kicinski * @prog_len: number of valid instructions in @prog array 462d9ae7f2bSJakub Kicinski * @__prog_alloc_len: alloc size of @prog array 46344b6fed0SJakub Kicinski * @stack_size: total amount of stack used 464c6c580d7SJakub Kicinski * @verifier_meta: temporary storage for verifier's insn meta 465012bb8a8SJakub Kicinski * @type: BPF program type 466854dc87dSJiong Wang * @last_bpf_off: address of the last instruction translated from BPF 467d9ae7f2bSJakub Kicinski * @tgt_out: jump target for normal exit 468d9ae7f2bSJakub Kicinski * @tgt_abort: jump target for abort (e.g. access outside of packet buffer) 469389f263bSQuentin Monnet * @tgt_call_push_regs: jump target for subroutine for saving R6~R9 to stack 470389f263bSQuentin Monnet * @tgt_call_pop_regs: jump target for subroutine used for restoring R6~R9 471d9ae7f2bSJakub Kicinski * @n_translated: number of successfully translated instructions (for errors) 472d9ae7f2bSJakub Kicinski * @error: error code if something went wrong 4731a7e62e6SQuentin Monnet * @stack_frame_depth: max stack depth for current frame 4748231f844SJakub Kicinski * @adjust_head_location: if program has single adjust head call - the insn no. 475630a4d38SJakub Kicinski * @map_records_cnt: the number of map pointers recorded for this prog 476c5da54d9SQuentin Monnet * @subprog_cnt: number of sub-programs, including main function 477630a4d38SJakub Kicinski * @map_records: the map record pointers from bpf->maps_neutral 478c5da54d9SQuentin Monnet * @subprog: pointer to an array of objects holding info about sub-programs 479e2fc6114SJakub Kicinski * @n_insns: number of instructions on @insns list 480d9ae7f2bSJakub Kicinski * @insns: list of BPF instruction wrappers (struct nfp_insn_meta) 481d9ae7f2bSJakub Kicinski */ 482d9ae7f2bSJakub Kicinski struct nfp_prog { 48377a844eeSJakub Kicinski struct nfp_app_bpf *bpf; 48477a844eeSJakub Kicinski 485d9ae7f2bSJakub Kicinski u64 *prog; 486d9ae7f2bSJakub Kicinski unsigned int prog_len; 487d9ae7f2bSJakub Kicinski unsigned int __prog_alloc_len; 488d9ae7f2bSJakub Kicinski 48944b6fed0SJakub Kicinski unsigned int stack_size; 49044b6fed0SJakub Kicinski 491c6c580d7SJakub Kicinski struct nfp_insn_meta *verifier_meta; 492c6c580d7SJakub Kicinski 493012bb8a8SJakub Kicinski enum bpf_prog_type type; 494d9ae7f2bSJakub Kicinski 495854dc87dSJiong Wang unsigned int last_bpf_off; 496d9ae7f2bSJakub Kicinski unsigned int tgt_out; 497d9ae7f2bSJakub Kicinski unsigned int tgt_abort; 498389f263bSQuentin Monnet unsigned int tgt_call_push_regs; 499389f263bSQuentin Monnet unsigned int tgt_call_pop_regs; 500d9ae7f2bSJakub Kicinski 501d9ae7f2bSJakub Kicinski unsigned int n_translated; 502d9ae7f2bSJakub Kicinski int error; 503d9ae7f2bSJakub Kicinski 5041a7e62e6SQuentin Monnet unsigned int stack_frame_depth; 5058231f844SJakub Kicinski unsigned int adjust_head_location; 506ee9133a8SJakub Kicinski 507630a4d38SJakub Kicinski unsigned int map_records_cnt; 508c5da54d9SQuentin Monnet unsigned int subprog_cnt; 509630a4d38SJakub Kicinski struct nfp_bpf_neutral_map **map_records; 510c5da54d9SQuentin Monnet struct nfp_bpf_subprog_info *subprog; 511630a4d38SJakub Kicinski 512e2fc6114SJakub Kicinski unsigned int n_insns; 513d9ae7f2bSJakub Kicinski struct list_head insns; 514d9ae7f2bSJakub Kicinski }; 515d9ae7f2bSJakub Kicinski 516d3f89b98SJakub Kicinski /** 517d3f89b98SJakub Kicinski * struct nfp_bpf_vnic - per-vNIC BPF priv structure 518d3f89b98SJakub Kicinski * @tc_prog: currently loaded cls_bpf program 5192314fe9eSJakub Kicinski * @start_off: address of the first instruction in the memory 5202314fe9eSJakub Kicinski * @tgt_done: jump target to get the next packet 521d3f89b98SJakub Kicinski */ 522d3f89b98SJakub Kicinski struct nfp_bpf_vnic { 523d3f89b98SJakub Kicinski struct bpf_prog *tc_prog; 5242314fe9eSJakub Kicinski unsigned int start_off; 5252314fe9eSJakub Kicinski unsigned int tgt_done; 526d3f89b98SJakub Kicinski }; 527d3f89b98SJakub Kicinski 528389f263bSQuentin Monnet bool nfp_is_subprog_start(struct nfp_insn_meta *meta); 529e2fc6114SJakub Kicinski void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog); 530c6c580d7SJakub Kicinski int nfp_bpf_jit(struct nfp_prog *prog); 53174801e50SQuentin Monnet bool nfp_bpf_supported_opcode(u8 code); 532d9ae7f2bSJakub Kicinski 5331da6f573SQuentin Monnet int nfp_verify_insn(struct bpf_verifier_env *env, int insn_idx, 5341da6f573SQuentin Monnet int prev_insn_idx); 5351da6f573SQuentin Monnet int nfp_bpf_finalize(struct bpf_verifier_env *env); 5361da6f573SQuentin Monnet 537a32014b3SJakub Kicinski int nfp_bpf_opt_replace_insn(struct bpf_verifier_env *env, u32 off, 538a32014b3SJakub Kicinski struct bpf_insn *insn); 5399a06927eSJakub Kicinski int nfp_bpf_opt_remove_insns(struct bpf_verifier_env *env, u32 off, u32 cnt); 540a32014b3SJakub Kicinski 5411385d755SQuentin Monnet extern const struct bpf_prog_offload_ops nfp_bpf_dev_ops; 542d9ae7f2bSJakub Kicinski 543c6c580d7SJakub Kicinski struct netdev_bpf; 544c6c580d7SJakub Kicinski struct nfp_app; 545bb45e51cSJakub Kicinski struct nfp_net; 546bb45e51cSJakub Kicinski 547af93d15aSJakub Kicinski int nfp_ndo_bpf(struct nfp_app *app, struct nfp_net *nn, 548af93d15aSJakub Kicinski struct netdev_bpf *bpf); 5499ce7a956SJakub Kicinski int nfp_net_bpf_offload(struct nfp_net *nn, struct bpf_prog *prog, 55052be9a7cSQuentin Monnet bool old_prog, struct netlink_ext_ack *extack); 551bb45e51cSJakub Kicinski 5525b674140SJiong Wang struct nfp_insn_meta * 5535b674140SJiong Wang nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, 554e2fc6114SJakub Kicinski unsigned int insn_idx); 5552314fe9eSJakub Kicinski 5562314fe9eSJakub Kicinski void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv); 557d48ae231SJakub Kicinski 5580c9864c0SJakub Kicinski unsigned int nfp_bpf_ctrl_cmsg_mtu(struct nfp_app_bpf *bpf); 559ff3d43f7SJakub Kicinski long long int 560ff3d43f7SJakub Kicinski nfp_bpf_ctrl_alloc_map(struct nfp_app_bpf *bpf, struct bpf_map *map); 561ff3d43f7SJakub Kicinski void 562ff3d43f7SJakub Kicinski nfp_bpf_ctrl_free_map(struct nfp_app_bpf *bpf, struct nfp_bpf_map *nfp_map); 563ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_getfirst_entry(struct bpf_offloaded_map *offmap, 564ff3d43f7SJakub Kicinski void *next_key); 565ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_update_entry(struct bpf_offloaded_map *offmap, 566ff3d43f7SJakub Kicinski void *key, void *value, u64 flags); 567ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_del_entry(struct bpf_offloaded_map *offmap, void *key); 568ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_lookup_entry(struct bpf_offloaded_map *offmap, 569ff3d43f7SJakub Kicinski void *key, void *value); 570ff3d43f7SJakub Kicinski int nfp_bpf_ctrl_getnext_entry(struct bpf_offloaded_map *offmap, 571ff3d43f7SJakub Kicinski void *key, void *next_key); 572ff3d43f7SJakub Kicinski 57320c54204SJakub Kicinski int nfp_bpf_event_output(struct nfp_app_bpf *bpf, const void *data, 57420c54204SJakub Kicinski unsigned int len); 5759816dd35SJakub Kicinski 576d48ae231SJakub Kicinski void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb); 57709587627SJakub Kicinski void 57809587627SJakub Kicinski nfp_bpf_ctrl_msg_rx_raw(struct nfp_app *app, const void *data, 57909587627SJakub Kicinski unsigned int len); 580d9ae7f2bSJakub Kicinski #endif 581