diff options
| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2018-05-03 18:37:12 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-05-04 23:41:03 +0200 |
| commit | 9816dd35ececc095f3e3be29d30d3adc755908d9 (patch) | |
| tree | 27d3ce05f416a68b1ac0b41140945ea58d036c39 /drivers/net/ethernet/netronome/nfp/bpf/fw.h | |
| parent | f4e3ec0d573e238f383b3da365127002579a07d6 (diff) | |
nfp: bpf: perf event output helpers support
Add support for the perf_event_output family of helpers.
The implementation on the NFP will not match the host code exactly.
The state of the host map and rings is unknown to the device, hence
device can't return errors when rings are not installed. The device
simply packs the data into a firmware notification message and sends
it over to the host, returning success to the program.
There is no notion of a host CPU on the device when packets are being
processed. Device will only offload programs which set BPF_F_CURRENT_CPU.
Still, if map index doesn't match CPU no error will be returned (see
above).
Dropped/lost firmware notification messages will not cause "lost
events" event on the perf ring, they are only visible via device
error counters.
Firmware notification messages may also get reordered in respect
to the packets which caused their generation.
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/fw.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/fw.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/fw.h b/drivers/net/ethernet/netronome/nfp/bpf/fw.h index 39639ac28b01..3dbc21653ce5 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/fw.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/fw.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2017 Netronome Systems, Inc. + * Copyright (C) 2017-2018 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 @@ -37,6 +37,14 @@ #include <linux/bitops.h> #include <linux/types.h> +/* Kernel's enum bpf_reg_type is not uABI so people may change it breaking + * our FW ABI. In that case we will do translation in the driver. + */ +#define NFP_BPF_SCALAR_VALUE 1 +#define NFP_BPF_MAP_VALUE 4 +#define NFP_BPF_STACK 6 +#define NFP_BPF_PACKET_DATA 8 + enum bpf_cap_tlv_type { NFP_BPF_CAP_TYPE_FUNC = 1, NFP_BPF_CAP_TYPE_ADJUST_HEAD = 2, @@ -81,6 +89,7 @@ enum nfp_bpf_cmsg_type { CMSG_TYPE_MAP_DELETE = 5, CMSG_TYPE_MAP_GETNEXT = 6, CMSG_TYPE_MAP_GETFIRST = 7, + CMSG_TYPE_BPF_EVENT = 8, __CMSG_TYPE_MAP_MAX, }; @@ -155,4 +164,13 @@ struct cmsg_reply_map_op { __be32 resv; struct cmsg_key_value_pair elem[0]; }; + +struct cmsg_bpf_event { + struct cmsg_hdr hdr; + __be32 cpu_id; + __be64 map_ptr; + __be32 data_size; + __be32 pkt_size; + u8 data[0]; +}; #endif |