diff options
| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-05-09 05:37:07 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-05-09 19:04:37 +0300 |
| commit | d985888faae6588c8ce9e45ad1e4a3ab5f0376b4 (patch) | |
| tree | aea09cd89f6cf39af298dc83b9bf75dc8f3735b0 /drivers/net/ethernet/netronome/nfp/bpf/main.h | |
| parent | 0d8300325660f81787892a1c58dc1f9428a67143 (diff) | |
| download | linux-d985888faae6588c8ce9e45ad1e4a3ab5f0376b4.tar.xz | |
nfp: bpf: support setting the RX queue index
BPF has access to all internal FW datapath structures. Including
the structure containing RX queue selection. With little coordination
with the datapath we can let the offloaded BPF select the RX queue.
We just need a way to tell the datapath that queue selection has already
been done and it shouldn't overwrite it. Define a bit to tell datapath
BPF already selected a queue (QSEL_SET), if the selected queue is not
enabled (>= number of enabled queues) datapath will perform normal RSS.
BPF queue selection on the NIC can be used to replace standard
datapath RSS with fully programmable BPF/XDP RSS.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/main.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/main.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index 82682378d57f..8b143546ae85 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -82,10 +82,16 @@ enum static_regs { enum pkt_vec { PKT_VEC_PKT_LEN = 0, PKT_VEC_PKT_PTR = 2, + PKT_VEC_QSEL_SET = 4, + PKT_VEC_QSEL_VAL = 6, }; +#define PKT_VEL_QSEL_SET_BIT 4 + #define pv_len(np) reg_lm(1, PKT_VEC_PKT_LEN) #define pv_ctm_ptr(np) reg_lm(1, PKT_VEC_PKT_PTR) +#define pv_qsel_set(np) reg_lm(1, PKT_VEC_QSEL_SET) +#define pv_qsel_val(np) reg_lm(1, PKT_VEC_QSEL_VAL) #define stack_reg(np) reg_a(STATIC_REG_STACK) #define stack_imm(np) imm_b(np) @@ -139,6 +145,7 @@ enum pkt_vec { * @helpers.perf_event_output: output perf event to a ring buffer * * @pseudo_random: FW initialized the pseudo-random machinery (CSRs) + * @queue_select: BPF can set the RX queue ID in packet vector */ struct nfp_app_bpf { struct nfp_app *app; @@ -181,6 +188,7 @@ struct nfp_app_bpf { } helpers; bool pseudo_random; + bool queue_select; }; enum nfp_bpf_map_use { |