From bfee64deaa766ba88ff42fcbced82ad4ef6cb315 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Wed, 28 Mar 2018 17:48:32 -0700 Subject: nfp: bpf: add map deletes from the datapath Support calling map_delete_elem() FW helper from the datapath programs. For JIT checks and code are basically equivalent to map lookups. Similarly to other map helper key must be on the stack. Different pointer types are left for future extension. Signed-off-by: Jakub Kicinski Reviewed-by: Quentin Monnet Reviewed-by: Jiong Wang Signed-off-by: Alexei Starovoitov --- drivers/net/ethernet/netronome/nfp/bpf/jit.c | 4 ++++ drivers/net/ethernet/netronome/nfp/bpf/main.c | 3 +++ drivers/net/ethernet/netronome/nfp/bpf/main.h | 2 ++ drivers/net/ethernet/netronome/nfp/bpf/verifier.c | 8 ++++++++ 4 files changed, 17 insertions(+) diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index c63368fc28f6..d8df56087961 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -2329,6 +2329,7 @@ static int call(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) return adjust_head(nfp_prog, meta); case BPF_FUNC_map_lookup_elem: case BPF_FUNC_map_update_elem: + case BPF_FUNC_map_delete_elem: return map_call_stack_common(nfp_prog, meta); default: WARN_ONCE(1, "verifier allowed unsupported function\n"); @@ -3216,6 +3217,9 @@ void *nfp_bpf_relo_for_vnic(struct nfp_prog *nfp_prog, struct nfp_bpf_vnic *bv) case BPF_FUNC_map_update_elem: val = nfp_prog->bpf->helpers.map_update; break; + case BPF_FUNC_map_delete_elem: + val = nfp_prog->bpf->helpers.map_delete; + break; default: pr_err("relocation of unknown helper %d\n", val); diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c index db6940551b32..a7e217c5204f 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c @@ -287,6 +287,9 @@ nfp_bpf_parse_cap_func(struct nfp_app_bpf *bpf, void __iomem *value, u32 length) case BPF_FUNC_map_update_elem: bpf->helpers.map_update = readl(&cap->func_addr); break; + case BPF_FUNC_map_delete_elem: + bpf->helpers.map_delete = readl(&cap->func_addr); + break; } return 0; diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.h b/drivers/net/ethernet/netronome/nfp/bpf/main.h index 0246bd88bff3..26bb491224b3 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.h +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.h @@ -129,6 +129,7 @@ enum pkt_vec { * @helpers: helper addressess for various calls * @helpers.map_lookup: map lookup helper address * @helpers.map_update: map update helper address + * @helpers.map_delete: map delete helper address */ struct nfp_app_bpf { struct nfp_app *app; @@ -164,6 +165,7 @@ struct nfp_app_bpf { struct { u32 map_lookup; u32 map_update; + u32 map_delete; } helpers; }; diff --git a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c index 482a0ce6e755..7d67ffc897dd 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/verifier.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/verifier.c @@ -201,6 +201,14 @@ nfp_bpf_check_call(struct nfp_prog *nfp_prog, struct bpf_verifier_env *env, !nfp_bpf_stack_arg_ok("map_update", env, reg3, NULL)) return -EOPNOTSUPP; break; + + case BPF_FUNC_map_delete_elem: + if (!nfp_bpf_map_call_ok("map_delete", env, meta, + bpf->helpers.map_delete, reg1) || + !nfp_bpf_stack_arg_ok("map_delete", env, reg2, + meta->func_id ? &meta->arg2 : NULL)) + return -EOPNOTSUPP; + break; default: pr_vlog(env, "unsupported function id: %d\n", func_id); return -EOPNOTSUPP; -- cgit v1.2.3-59-g8ed1b