diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/main.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/main.h | 111 |
1 files changed, 90 insertions, 21 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index 57b6043177a3..66381afee2a9 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2016 Netronome Systems, Inc. + * Copyright (C) 2016-2017 Netronome Systems, Inc. * * This software is dual licensed under the GNU General License Version 2, * June 1991 as shown in the file COPYING in the top-level directory of this @@ -42,17 +42,28 @@ #include "../nfp_asm.h" -/* For branch fixup logic use up-most byte of branch instruction as scratch +/* For relocation logic use up-most byte of branch instruction as scratch * area. Remember to clear this before sending instructions to HW! */ -#define OP_BR_SPECIAL 0xff00000000000000ULL - -enum br_special { - OP_BR_NORMAL = 0, - OP_BR_GO_OUT, - OP_BR_GO_ABORT, +#define OP_RELO_TYPE 0xff00000000000000ULL + +enum nfp_relo_type { + RELO_NONE = 0, + /* standard internal jumps */ + RELO_BR_REL, + /* internal jumps to parts of the outro */ + RELO_BR_GO_OUT, + RELO_BR_GO_ABORT, + /* external jumps to fixed addresses */ + RELO_BR_NEXT_PKT, }; +/* To make absolute relocated branches (branches other than RELO_BR_REL) + * distinguishable in user space dumps from normal jumps, add a large offset + * to them. + */ +#define BR_OFF_RELO 15000 + enum static_regs { STATIC_REG_IMM = 21, /* Bank AB */ STATIC_REG_STACK = 22, /* Bank A */ @@ -78,6 +89,29 @@ enum pkt_vec { #define NFP_BPF_ABI_FLAGS reg_imm(0) #define NFP_BPF_ABI_FLAG_MARK 1 +/** + * struct nfp_app_bpf - bpf app priv structure + * @app: backpointer to the app + * + * @adjust_head: adjust head capability + * @flags: extra flags for adjust head + * @off_min: minimal packet offset within buffer required + * @off_max: maximum packet offset within buffer required + * @guaranteed_sub: amount of negative adjustment guaranteed possible + * @guaranteed_add: amount of positive adjustment guaranteed possible + */ +struct nfp_app_bpf { + struct nfp_app *app; + + struct nfp_bpf_cap_adjust_head { + u32 flags; + int off_min; + int off_max; + int guaranteed_sub; + int guaranteed_add; + } adjust_head; +}; + struct nfp_prog; struct nfp_insn_meta; typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); @@ -89,23 +123,39 @@ typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); #define nfp_meta_next(meta) list_next_entry(meta, l) #define nfp_meta_prev(meta) list_prev_entry(meta, l) +#define FLAG_INSN_IS_JUMP_DST BIT(0) + /** * struct nfp_insn_meta - BPF instruction wrapper * @insn: BPF instruction * @ptr: pointer type for memory operations + * @ldst_gather_len: memcpy length gathered from load/store sequence + * @paired_st: the paired store insn at the head of the sequence + * @arg2: arg2 for call instructions * @ptr_not_const: pointer is not always constant + * @jmp_dst: destination info for jump instructions * @off: index of first generated machine instruction (in nfp_prog.prog) * @n: eBPF instruction number + * @flags: eBPF instruction extra optimization flags * @skip: skip this instruction (optimized out) * @double_cb: callback for second part of the instruction * @l: link on nfp_prog->insns list */ struct nfp_insn_meta { struct bpf_insn insn; - struct bpf_reg_state ptr; - bool ptr_not_const; + union { + struct { + struct bpf_reg_state ptr; + struct bpf_insn *paired_st; + s16 ldst_gather_len; + bool ptr_not_const; + }; + struct nfp_insn_meta *jmp_dst; + struct bpf_reg_state arg2; + }; unsigned int off; unsigned short n; + unsigned short flags; bool skip; instr_cb_t double_cb; @@ -134,23 +184,36 @@ static inline u8 mbpf_mode(const struct nfp_insn_meta *meta) return BPF_MODE(meta->insn.code); } +static inline bool is_mbpf_load(const struct nfp_insn_meta *meta) +{ + return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_LDX | BPF_MEM); +} + +static inline bool is_mbpf_store(const struct nfp_insn_meta *meta) +{ + return (meta->insn.code & ~BPF_SIZE_MASK) == (BPF_STX | BPF_MEM); +} + /** * struct nfp_prog - nfp BPF program + * @bpf: backpointer to the bpf app priv structure * @prog: machine code * @prog_len: number of valid instructions in @prog array * @__prog_alloc_len: alloc size of @prog array * @verifier_meta: temporary storage for verifier's insn meta * @type: BPF program type - * @start_off: address of the first instruction in the memory + * @last_bpf_off: address of the last instruction translated from BPF * @tgt_out: jump target for normal exit * @tgt_abort: jump target for abort (e.g. access outside of packet buffer) - * @tgt_done: jump target to get the next packet * @n_translated: number of successfully translated instructions (for errors) * @error: error code if something went wrong * @stack_depth: max stack depth from the verifier + * @adjust_head_location: if program has single adjust head call - the insn no. * @insns: list of BPF instruction wrappers (struct nfp_insn_meta) */ struct nfp_prog { + struct nfp_app_bpf *bpf; + u64 *prog; unsigned int prog_len; unsigned int __prog_alloc_len; @@ -159,15 +222,15 @@ struct nfp_prog { enum bpf_prog_type type; - unsigned int start_off; + unsigned int last_bpf_off; unsigned int tgt_out; unsigned int tgt_abort; - unsigned int tgt_done; unsigned int n_translated; int error; unsigned int stack_depth; + unsigned int adjust_head_location; struct list_head insns; }; @@ -175,26 +238,32 @@ struct nfp_prog { /** * struct nfp_bpf_vnic - per-vNIC BPF priv structure * @tc_prog: currently loaded cls_bpf program + * @start_off: address of the first instruction in the memory + * @tgt_done: jump target to get the next packet */ struct nfp_bpf_vnic { struct bpf_prog *tc_prog; + unsigned int start_off; + unsigned int tgt_done; }; +void nfp_bpf_jit_prepare(struct nfp_prog *nfp_prog, unsigned int cnt); int nfp_bpf_jit(struct nfp_prog *prog); -extern const struct bpf_ext_analyzer_ops nfp_bpf_analyzer_ops; +extern const struct bpf_prog_offload_ops nfp_bpf_analyzer_ops; struct netdev_bpf; struct nfp_app; struct nfp_net; +int nfp_ndo_bpf(struct nfp_app *app, struct nfp_net *nn, + struct netdev_bpf *bpf); int nfp_net_bpf_offload(struct nfp_net *nn, struct bpf_prog *prog, bool old_prog); -int nfp_bpf_verifier_prep(struct nfp_app *app, struct nfp_net *nn, - struct netdev_bpf *bpf); -int nfp_bpf_translate(struct nfp_app *app, struct nfp_net *nn, - struct bpf_prog *prog); -int nfp_bpf_destroy(struct nfp_app *app, struct nfp_net *nn, - struct bpf_prog *prog); +struct nfp_insn_meta * +nfp_bpf_goto_meta(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, + unsigned int insn_idx, unsigned int n_insns); + +void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv); #endif |