diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/main.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/main.c | 100 |
1 files changed, 92 insertions, 8 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c index 4b63167906ca..4ee11bf2aed7 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c @@ -87,16 +87,21 @@ static const char *nfp_bpf_extra_cap(struct nfp_app *app, struct nfp_net *nn) static int nfp_bpf_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id) { + struct nfp_bpf_vnic *bv; int err; - nn->app_priv = kzalloc(sizeof(struct nfp_bpf_vnic), GFP_KERNEL); - if (!nn->app_priv) + bv = kzalloc(sizeof(*bv), GFP_KERNEL); + if (!bv) return -ENOMEM; + nn->app_priv = bv; err = nfp_app_nic_vnic_alloc(app, nn, id); if (err) goto err_free_priv; + bv->start_off = nn_readw(nn, NFP_NET_CFG_BPF_START); + bv->tgt_done = nn_readw(nn, NFP_NET_CFG_BPF_DONE); + return 0; err_free_priv: kfree(nn->app_priv); @@ -191,7 +196,27 @@ static int nfp_bpf_setup_tc(struct nfp_app *app, struct net_device *netdev, static bool nfp_bpf_tc_busy(struct nfp_app *app, struct nfp_net *nn) { - return nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF; + struct nfp_bpf_vnic *bv = nn->app_priv; + + return !!bv->tc_prog; +} + +static int +nfp_bpf_change_mtu(struct nfp_app *app, struct net_device *netdev, int new_mtu) +{ + struct nfp_net *nn = netdev_priv(netdev); + unsigned int max_mtu; + + if (~nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF) + return 0; + + max_mtu = nn_readb(nn, NFP_NET_CFG_BPF_INL_MTU) * 64 - 32; + if (new_mtu > max_mtu) { + nn_info(nn, "BPF offload active, MTU over %u not supported\n", + max_mtu); + return -EBUSY; + } + return 0; } static int @@ -226,6 +251,45 @@ nfp_bpf_parse_cap_adjust_head(struct nfp_app_bpf *bpf, void __iomem *value, return 0; } +static int +nfp_bpf_parse_cap_func(struct nfp_app_bpf *bpf, void __iomem *value, u32 length) +{ + struct nfp_bpf_cap_tlv_func __iomem *cap = value; + + if (length < sizeof(*cap)) { + nfp_err(bpf->app->cpp, "truncated function TLV: %d\n", length); + return -EINVAL; + } + + switch (readl(&cap->func_id)) { + case BPF_FUNC_map_lookup_elem: + bpf->helpers.map_lookup = readl(&cap->func_addr); + break; + } + + return 0; +} + +static int +nfp_bpf_parse_cap_maps(struct nfp_app_bpf *bpf, void __iomem *value, u32 length) +{ + struct nfp_bpf_cap_tlv_maps __iomem *cap = value; + + if (length < sizeof(*cap)) { + nfp_err(bpf->app->cpp, "truncated maps TLV: %d\n", length); + return -EINVAL; + } + + bpf->maps.types = readl(&cap->types); + bpf->maps.max_maps = readl(&cap->max_maps); + bpf->maps.max_elems = readl(&cap->max_elems); + bpf->maps.max_key_sz = readl(&cap->max_key_sz); + bpf->maps.max_val_sz = readl(&cap->max_val_sz); + bpf->maps.max_elem_sz = readl(&cap->max_elem_sz); + + return 0; +} + static int nfp_bpf_parse_capabilities(struct nfp_app *app) { struct nfp_cpp *cpp = app->pf->cpp; @@ -251,11 +315,19 @@ static int nfp_bpf_parse_capabilities(struct nfp_app *app) goto err_release_free; switch (type) { + case NFP_BPF_CAP_TYPE_FUNC: + if (nfp_bpf_parse_cap_func(app->priv, value, length)) + goto err_release_free; + break; case NFP_BPF_CAP_TYPE_ADJUST_HEAD: if (nfp_bpf_parse_cap_adjust_head(app->priv, value, length)) goto err_release_free; break; + case NFP_BPF_CAP_TYPE_MAPS: + if (nfp_bpf_parse_cap_maps(app->priv, value, length)) + goto err_release_free; + break; default: nfp_dbg(cpp, "unknown BPF capability: %d\n", type); break; @@ -288,6 +360,10 @@ static int nfp_bpf_init(struct nfp_app *app) bpf->app = app; app->priv = bpf; + skb_queue_head_init(&bpf->cmsg_replies); + init_waitqueue_head(&bpf->cmsg_wq); + INIT_LIST_HEAD(&bpf->map_list); + err = nfp_bpf_parse_capabilities(app); if (err) goto err_free_bpf; @@ -301,26 +377,34 @@ err_free_bpf: static void nfp_bpf_clean(struct nfp_app *app) { - kfree(app->priv); + struct nfp_app_bpf *bpf = app->priv; + + WARN_ON(!skb_queue_empty(&bpf->cmsg_replies)); + WARN_ON(!list_empty(&bpf->map_list)); + WARN_ON(bpf->maps_in_use || bpf->map_elems_in_use); + kfree(bpf); } const struct nfp_app_type app_bpf = { .id = NFP_APP_BPF_NIC, .name = "ebpf", + .ctrl_cap_mask = 0, + .init = nfp_bpf_init, .clean = nfp_bpf_clean, + .change_mtu = nfp_bpf_change_mtu, + .extra_cap = nfp_bpf_extra_cap, .vnic_alloc = nfp_bpf_vnic_alloc, .vnic_free = nfp_bpf_vnic_free, + .ctrl_msg_rx = nfp_bpf_ctrl_msg_rx, + .setup_tc = nfp_bpf_setup_tc, .tc_busy = nfp_bpf_tc_busy, + .bpf = nfp_ndo_bpf, .xdp_offload = nfp_bpf_xdp_offload, - - .bpf_verifier_prep = nfp_bpf_verifier_prep, - .bpf_translate = nfp_bpf_translate, - .bpf_destroy = nfp_bpf_destroy, }; |