diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/main.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/main.h | 114 |
1 files changed, 41 insertions, 73 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index 4051e943f363..082a15f6dfb5 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -36,10 +36,11 @@ #include <linux/bitfield.h> #include <linux/bpf.h> +#include <linux/bpf_verifier.h> #include <linux/list.h> #include <linux/types.h> -#include "../nfp_net.h" +#include "../nfp_asm.h" /* For branch fixup logic use up-most byte of branch instruction as scratch * area. Remember to clear this before sending instructions to HW! @@ -53,51 +54,29 @@ enum br_special { }; enum static_regs { - STATIC_REG_PKT = 1, -#define REG_PKT_BANK ALU_DST_A - STATIC_REG_IMM = 2, /* Bank AB */ + STATIC_REG_IMM = 21, /* Bank AB */ + STATIC_REG_STACK = 22, /* Bank A */ + STATIC_REG_PKT_LEN = 22, /* Bank B */ }; -enum nfp_bpf_action_type { - NN_ACT_TC_DROP, - NN_ACT_TC_REDIR, - NN_ACT_DIRECT, - NN_ACT_XDP, +enum pkt_vec { + PKT_VEC_PKT_LEN = 0, + PKT_VEC_PKT_PTR = 2, }; -/* Software register representation, hardware encoding in asm.h */ -#define NN_REG_TYPE GENMASK(31, 24) -#define NN_REG_VAL GENMASK(7, 0) - -enum nfp_bpf_reg_type { - NN_REG_GPR_A = BIT(0), - NN_REG_GPR_B = BIT(1), - NN_REG_NNR = BIT(2), - NN_REG_XFER = BIT(3), - NN_REG_IMM = BIT(4), - NN_REG_NONE = BIT(5), -}; - -#define NN_REG_GPR_BOTH (NN_REG_GPR_A | NN_REG_GPR_B) - -#define reg_both(x) ((x) | FIELD_PREP(NN_REG_TYPE, NN_REG_GPR_BOTH)) -#define reg_a(x) ((x) | FIELD_PREP(NN_REG_TYPE, NN_REG_GPR_A)) -#define reg_b(x) ((x) | FIELD_PREP(NN_REG_TYPE, NN_REG_GPR_B)) -#define reg_nnr(x) ((x) | FIELD_PREP(NN_REG_TYPE, NN_REG_NNR)) -#define reg_xfer(x) ((x) | FIELD_PREP(NN_REG_TYPE, NN_REG_XFER)) -#define reg_imm(x) ((x) | FIELD_PREP(NN_REG_TYPE, NN_REG_IMM)) -#define reg_none() (FIELD_PREP(NN_REG_TYPE, NN_REG_NONE)) +#define pv_len(np) reg_lm(1, PKT_VEC_PKT_LEN) +#define pv_ctm_ptr(np) reg_lm(1, PKT_VEC_PKT_PTR) -#define pkt_reg(np) reg_a((np)->regs_per_thread - STATIC_REG_PKT) -#define imm_a(np) reg_a((np)->regs_per_thread - STATIC_REG_IMM) -#define imm_b(np) reg_b((np)->regs_per_thread - STATIC_REG_IMM) -#define imm_both(np) reg_both((np)->regs_per_thread - STATIC_REG_IMM) +#define stack_reg(np) reg_a(STATIC_REG_STACK) +#define stack_imm(np) imm_b(np) +#define plen_reg(np) reg_b(STATIC_REG_PKT_LEN) +#define pptr_reg(np) pv_ctm_ptr(np) +#define imm_a(np) reg_a(STATIC_REG_IMM) +#define imm_b(np) reg_b(STATIC_REG_IMM) +#define imm_both(np) reg_both(STATIC_REG_IMM) -#define NFP_BPF_ABI_FLAGS reg_nnr(0) +#define NFP_BPF_ABI_FLAGS reg_imm(0) #define NFP_BPF_ABI_FLAG_MARK 1 -#define NFP_BPF_ABI_MARK reg_nnr(1) -#define NFP_BPF_ABI_PKT reg_nnr(2) -#define NFP_BPF_ABI_LEN reg_nnr(3) struct nfp_prog; struct nfp_insn_meta; @@ -113,6 +92,8 @@ typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); /** * struct nfp_insn_meta - BPF instruction wrapper * @insn: BPF instruction + * @ptr: pointer type for memory operations + * @ptr_not_const: pointer is not always constant * @off: index of first generated machine instruction (in nfp_prog.prog) * @n: eBPF instruction number * @skip: skip this instruction (optimized out) @@ -121,6 +102,8 @@ typedef int (*instr_cb_t)(struct nfp_prog *, struct nfp_insn_meta *); */ struct nfp_insn_meta { struct bpf_insn insn; + struct bpf_reg_state ptr; + bool ptr_not_const; unsigned int off; unsigned short n; bool skip; @@ -156,15 +139,15 @@ static inline u8 mbpf_mode(const struct nfp_insn_meta *meta) * @prog: machine code * @prog_len: number of valid instructions in @prog array * @__prog_alloc_len: alloc size of @prog array - * @act: BPF program/action type (TC DA, TC with action, XDP etc.) - * @num_regs: number of registers used by this program - * @regs_per_thread: number of basic registers allocated per thread + * @verifier_meta: temporary storage for verifier's insn meta + * @type: BPF program type * @start_off: address of the first instruction in the memory * @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 * @insns: list of BPF instruction wrappers (struct nfp_insn_meta) */ struct nfp_prog { @@ -172,10 +155,9 @@ struct nfp_prog { unsigned int prog_len; unsigned int __prog_alloc_len; - enum nfp_bpf_action_type act; + struct nfp_insn_meta *verifier_meta; - unsigned int num_regs; - unsigned int regs_per_thread; + enum bpf_prog_type type; unsigned int start_off; unsigned int tgt_out; @@ -185,40 +167,26 @@ struct nfp_prog { unsigned int n_translated; int error; - struct list_head insns; -}; + unsigned int stack_depth; -struct nfp_bpf_result { - unsigned int n_instr; - bool dense_mode; + struct list_head insns; }; -int -nfp_bpf_jit(struct bpf_prog *filter, void *prog, enum nfp_bpf_action_type act, - unsigned int prog_start, unsigned int prog_done, - unsigned int prog_sz, struct nfp_bpf_result *res); +int nfp_bpf_jit(struct nfp_prog *prog); -int nfp_prog_verify(struct nfp_prog *nfp_prog, struct bpf_prog *prog); +extern const struct bpf_ext_analyzer_ops nfp_bpf_analyzer_ops; +struct netdev_bpf; +struct nfp_app; struct nfp_net; -struct tc_cls_bpf_offload; - -/** - * struct nfp_net_bpf_priv - per-vNIC BPF private data - * @rx_filter: Filter offload statistics - dropped packets/bytes - * @rx_filter_prev: Filter offload statistics - values from previous update - * @rx_filter_change: Jiffies when statistics last changed - * @rx_filter_stats_timer: Timer for polling filter offload statistics - * @rx_filter_lock: Lock protecting timer state changes (teardown) - */ -struct nfp_net_bpf_priv { - struct nfp_stat_pair rx_filter, rx_filter_prev; - unsigned long rx_filter_change; - struct timer_list rx_filter_stats_timer; - spinlock_t rx_filter_lock; -}; -int nfp_net_bpf_offload(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf); -void nfp_net_filter_stats_timer(unsigned long data); +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); #endif |