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nfp: bpf: encode indirect commands

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Add support for emitting commands with field overwrites.

Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Jiong Wang <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
This commit is contained in:
Jakub Kicinski 2017-11-30 21:32:56 -08:00 • committed by Daniel Borkmann
commit 5468a8b929
2 changed files with 15 additions and 5 deletions
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17
drivers/net/ethernet/netronome/nfp/bpf/jit.c
View file

@ -96,7 +96,7 @@ nfp_prog_offset_to_index(struct nfp_prog *nfp_prog, unsigned int offset)
/* --- Emitters --- */
static void
__emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op,
u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, bool sync)
u8 mode, u8 xfer, u8 areg, u8 breg, u8 size, bool sync, bool indir)
{
enum cmd_ctx_swap ctx;
u64 insn;
@ -114,14 +114,15 @@ __emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op,
FIELD_PREP(OP_CMD_CNT, size) |
FIELD_PREP(OP_CMD_SIG, sync) |
FIELD_PREP(OP_CMD_TGT_CMD, cmd_tgt_act[op].tgt_cmd) |
FIELD_PREP(OP_CMD_INDIR, indir) |
FIELD_PREP(OP_CMD_MODE, mode);
nfp_prog_push(nfp_prog, insn);
}
static void
emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op,
u8 mode, u8 xfer, swreg lreg, swreg rreg, u8 size, bool sync)
emit_cmd_any(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer,
swreg lreg, swreg rreg, u8 size, bool sync, bool indir)
{
struct nfp_insn_re_regs reg;
int err;
@ -142,7 +143,15 @@ emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op,
return;
}
__emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, sync);
__emit_cmd(nfp_prog, op, mode, xfer, reg.areg, reg.breg, size, sync,
indir);
}
static void
emit_cmd(struct nfp_prog *nfp_prog, enum cmd_tgt_map op, u8 mode, u8 xfer,
swreg lreg, swreg rreg, u8 size, bool sync)
{
emit_cmd_any(nfp_prog, op, mode, xfer, lreg, rreg, size, sync, false);
}
static void

3
drivers/net/ethernet/netronome/nfp/nfp_asm.h
View file

@ -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
@ -209,6 +209,7 @@ enum alu_dst_ab {
#define OP_CMD_CNT 0x0000e000000ULL
#define OP_CMD_SIG 0x000f0000000ULL
#define OP_CMD_TGT_CMD 0x07f00000000ULL
#define OP_CMD_INDIR 0x20000000000ULL
#define OP_CMD_MODE 0x1c0000000000ULL
struct cmd_tgt_act {