From: Pieter Jansen van Vuuren Date: Thu, 29 Jun 2017 20:08:19 +0000 (+0200) Subject: nfp: add control message passing capabilities to flower offloads X-Git-Tag: MMI-PSA29.97-13-9~5285^2~47^2 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=81f3ddf2547d40c3d4878aa66ce837177665ce3c;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git nfp: add control message passing capabilities to flower offloads Previously the flower offloads never sends messages to the hardware, and never registers a handler for receiving messages from hardware. This patch enables the flower offloads to send control messages to hardware when adding and removing flow rules. Additionally it registers a control message rx handler for receiving stats updates from hardware for each offloaded flow. Additionally this patch adds 4 control message types; Add, modify and delete flow, as well as flow stats. It also allows nfp_flower_cmsg_get_data() to be used outside of cmsg.c. Signed-off-by: Pieter Jansen van Vuuren Signed-off-by: Simon Horman Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/netronome/nfp/flower/cmsg.c b/drivers/net/ethernet/netronome/nfp/flower/cmsg.c index 0f5410aa66d6..dd7fa9cf225f 100644 --- a/drivers/net/ethernet/netronome/nfp/flower/cmsg.c +++ b/drivers/net/ethernet/netronome/nfp/flower/cmsg.c @@ -36,6 +36,7 @@ #include #include +#include "main.h" #include "../nfpcore/nfp_cpp.h" #include "../nfp_net_repr.h" #include "./cmsg.h" @@ -52,7 +53,7 @@ nfp_flower_cmsg_get_hdr(struct sk_buff *skb) return (struct nfp_flower_cmsg_hdr *)skb->data; } -static struct sk_buff * +struct sk_buff * nfp_flower_cmsg_alloc(struct nfp_app *app, unsigned int size, enum nfp_flower_cmsg_type_port type) { @@ -143,6 +144,9 @@ void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb) case NFP_FLOWER_CMSG_TYPE_PORT_MOD: nfp_flower_cmsg_portmod_rx(app, skb); break; + case NFP_FLOWER_CMSG_TYPE_FLOW_STATS: + nfp_flower_rx_flow_stats(app, skb); + break; default: nfp_flower_cmsg_warn(app, "Cannot handle invalid repr control type %u\n", type); diff --git a/drivers/net/ethernet/netronome/nfp/flower/cmsg.h b/drivers/net/ethernet/netronome/nfp/flower/cmsg.h index ee543ff3a9d8..cf738de170ab 100644 --- a/drivers/net/ethernet/netronome/nfp/flower/cmsg.h +++ b/drivers/net/ethernet/netronome/nfp/flower/cmsg.h @@ -245,7 +245,10 @@ struct nfp_flower_cmsg_hdr { /* Types defined for port related control messages */ enum nfp_flower_cmsg_type_port { + NFP_FLOWER_CMSG_TYPE_FLOW_ADD = 0, + NFP_FLOWER_CMSG_TYPE_FLOW_DEL = 2, NFP_FLOWER_CMSG_TYPE_PORT_MOD = 8, + NFP_FLOWER_CMSG_TYPE_FLOW_STATS = 15, NFP_FLOWER_CMSG_TYPE_PORT_ECHO = 16, NFP_FLOWER_CMSG_TYPE_MAX = 32, }; @@ -307,5 +310,8 @@ static inline void *nfp_flower_cmsg_get_data(struct sk_buff *skb) int nfp_flower_cmsg_portmod(struct nfp_repr *repr, bool carrier_ok); void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb); +struct sk_buff * +nfp_flower_cmsg_alloc(struct nfp_app *app, unsigned int size, + enum nfp_flower_cmsg_type_port type); #endif diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c index 1a2e2b9b75a3..4ad10bd5e139 100644 --- a/drivers/net/ethernet/netronome/nfp/flower/offload.c +++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c @@ -44,6 +44,52 @@ #include "../nfp_net.h" #include "../nfp_port.h" +static int +nfp_flower_xmit_flow(struct net_device *netdev, + struct nfp_fl_payload *nfp_flow, u8 mtype) +{ + u32 meta_len, key_len, mask_len, act_len, tot_len; + struct nfp_repr *priv = netdev_priv(netdev); + struct sk_buff *skb; + unsigned char *msg; + + meta_len = sizeof(struct nfp_fl_rule_metadata); + key_len = nfp_flow->meta.key_len; + mask_len = nfp_flow->meta.mask_len; + act_len = nfp_flow->meta.act_len; + + tot_len = meta_len + key_len + mask_len + act_len; + + /* Convert to long words as firmware expects + * lengths in units of NFP_FL_LW_SIZ. + */ + nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ; + nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ; + nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ; + + skb = nfp_flower_cmsg_alloc(priv->app, tot_len, mtype); + if (!skb) + return -ENOMEM; + + msg = nfp_flower_cmsg_get_data(skb); + memcpy(msg, &nfp_flow->meta, meta_len); + memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len); + memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len); + memcpy(&msg[meta_len + key_len + mask_len], + nfp_flow->action_data, act_len); + + /* Convert back to bytes as software expects + * lengths in units of bytes. + */ + nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ; + nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ; + nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ; + + nfp_ctrl_tx(priv->app->ctrl, skb); + + return 0; +} + static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f) { return dissector_uses_key(f->dissector, @@ -228,6 +274,11 @@ nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev, if (err) goto err_destroy_flow; + err = nfp_flower_xmit_flow(netdev, flow_pay, + NFP_FLOWER_CMSG_TYPE_FLOW_ADD); + if (err) + goto err_destroy_flow; + INIT_HLIST_NODE(&flow_pay->link); flow_pay->tc_flower_cookie = flow->cookie; hash_add_rcu(priv->flow_table, &flow_pay->link, flow->cookie); @@ -270,7 +321,15 @@ nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev, return -ENOENT; err = nfp_modify_flow_metadata(app, nfp_flow); + if (err) + goto err_free_flow; + err = nfp_flower_xmit_flow(netdev, nfp_flow, + NFP_FLOWER_CMSG_TYPE_FLOW_DEL); + if (err) + goto err_free_flow; + +err_free_flow: hash_del_rcu(&nfp_flow->link); kfree(nfp_flow->action_data); kfree(nfp_flow->mask_data);