diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/jit.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/jit.c | 80 |
1 files changed, 78 insertions, 2 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index 56451edf01c2..0a2c1d87fed2 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -1838,6 +1838,74 @@ mem_ldx_emem(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, tmp_reg, meta->insn.dst_reg * 2, size); } +static void +mem_ldx_data_init_pktcache(struct nfp_prog *nfp_prog, + struct nfp_insn_meta *meta) +{ + s16 range_start = meta->pkt_cache.range_start; + s16 range_end = meta->pkt_cache.range_end; + swreg src_base, off; + u8 xfer_num, len; + bool indir; + + off = re_load_imm_any(nfp_prog, range_start, imm_b(nfp_prog)); + src_base = reg_a(meta->insn.src_reg * 2); + len = range_end - range_start; + xfer_num = round_up(len, REG_WIDTH) / REG_WIDTH; + + indir = len > 8 * REG_WIDTH; + /* Setup PREV_ALU for indirect mode. */ + if (indir) + wrp_immed(nfp_prog, reg_none(), + CMD_OVE_LEN | FIELD_PREP(CMD_OV_LEN, xfer_num - 1)); + + /* Cache memory into transfer-in registers. */ + emit_cmd_any(nfp_prog, CMD_TGT_READ32_SWAP, CMD_MODE_32b, 0, src_base, + off, xfer_num - 1, true, indir); +} + +static int +mem_ldx_data_from_pktcache_aligned(struct nfp_prog *nfp_prog, + struct nfp_insn_meta *meta, + unsigned int size) +{ + swreg dst_lo, dst_hi, src_lo; + u8 dst_gpr, idx; + + idx = (meta->insn.off - meta->pkt_cache.range_start) / REG_WIDTH; + dst_gpr = meta->insn.dst_reg * 2; + dst_hi = reg_both(dst_gpr + 1); + dst_lo = reg_both(dst_gpr); + src_lo = reg_xfer(idx); + + if (size < REG_WIDTH) { + wrp_reg_subpart(nfp_prog, dst_lo, src_lo, size, 0); + wrp_immed(nfp_prog, dst_hi, 0); + } else if (size == REG_WIDTH) { + wrp_mov(nfp_prog, dst_lo, src_lo); + wrp_immed(nfp_prog, dst_hi, 0); + } else { + swreg src_hi = reg_xfer(idx + 1); + + wrp_mov(nfp_prog, dst_lo, src_lo); + wrp_mov(nfp_prog, dst_hi, src_hi); + } + + return 0; +} + +static int +mem_ldx_data_from_pktcache(struct nfp_prog *nfp_prog, + struct nfp_insn_meta *meta, unsigned int size) +{ + u8 off = meta->insn.off - meta->pkt_cache.range_start; + + if (WARN_ON_ONCE(!IS_ALIGNED(off, REG_WIDTH))) + return -EOPNOTSUPP; + + return mem_ldx_data_from_pktcache_aligned(nfp_prog, meta, size); +} + static int mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, unsigned int size) @@ -1852,8 +1920,16 @@ mem_ldx(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta, return mem_ldx_skb(nfp_prog, meta, size); } - if (meta->ptr.type == PTR_TO_PACKET) - return mem_ldx_data(nfp_prog, meta, size); + if (meta->ptr.type == PTR_TO_PACKET) { + if (meta->pkt_cache.range_end) { + if (meta->pkt_cache.do_init) + mem_ldx_data_init_pktcache(nfp_prog, meta); + + return mem_ldx_data_from_pktcache(nfp_prog, meta, size); + } else { + return mem_ldx_data(nfp_prog, meta, size); + } + } if (meta->ptr.type == PTR_TO_STACK) return mem_ldx_stack(nfp_prog, meta, size, |
