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path: root/drivers/net/ethernet/netronome/nfp/bpf/main.h
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Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/main.h')
-rw-r--r--drivers/net/ethernet/netronome/nfp/bpf/main.h118
1 files changed, 47 insertions, 71 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h
index 4051e943f363..57b6043177a3 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 +167,34 @@ struct nfp_prog {
unsigned int n_translated;
int error;
+ unsigned int stack_depth;
+
struct list_head insns;
};
-struct nfp_bpf_result {
- unsigned int n_instr;
- bool dense_mode;
+/**
+ * struct nfp_bpf_vnic - per-vNIC BPF priv structure
+ * @tc_prog: currently loaded cls_bpf program
+ */
+struct nfp_bpf_vnic {
+ struct bpf_prog *tc_prog;
};
-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
generated by cgit v1.2.3 (git 2.39.0) at 2024-10-31 16:35:52 +0300