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Commit 09587627 authored by Jakub Kicinski's avatar Jakub Kicinski Committed by Daniel Borkmann
Browse files

nfp: bpf: allow receiving perf events on data queues 



Control queue is fairly low latency, and requires SKB allocations,
which means we can't even reach 0.5Msps with perf events.  Allow
perf events to be delivered to data queues.  This allows us to not
only use multiple queues, but also receive and deliver to user space
more than 5Msps per queue (Xeon E5-2630 v4 2.20GHz, no retpolines).

Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: default avatarDirk van der Merwe <dirk.vandermerwe@netronome.com>
Reviewed-by: default avatarQuentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 20c54204

drivers/net/ethernet/netronome/nfp/bpf/cmsg.c

+18 −0
Original line number Diff line number Diff line
@@ -468,3 +468,21 @@ void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb) 
err_free:

	dev_kfree_skb_any(skb);

}



void

nfp_bpf_ctrl_msg_rx_raw(struct nfp_app *app, const void *data, unsigned int len)

{

	struct nfp_app_bpf *bpf = app->priv;

	const struct cmsg_hdr *hdr = data;



	if (unlikely(len < sizeof(struct cmsg_reply_map_simple))) {

		cmsg_warn(bpf, "cmsg drop - too short %d!\n", len);

		return;

	}



	if (hdr->type == CMSG_TYPE_BPF_EVENT)

		nfp_bpf_event_output(bpf, data, len);

	else

		cmsg_warn(bpf, "cmsg drop - msg type %d with raw buffer!\n",

			  hdr->type);

}

drivers/net/ethernet/netronome/nfp/bpf/main.c

+1 −0
Original line number Diff line number Diff line
@@ -490,6 +490,7 @@ const struct nfp_app_type app_bpf = { 
	.vnic_free	= nfp_bpf_vnic_free,



	.ctrl_msg_rx	= nfp_bpf_ctrl_msg_rx,

	.ctrl_msg_rx_raw	= nfp_bpf_ctrl_msg_rx_raw,



	.setup_tc	= nfp_bpf_setup_tc,

	.bpf		= nfp_ndo_bpf,

drivers/net/ethernet/netronome/nfp/bpf/main.h

+3 −0
Original line number Diff line number Diff line
@@ -505,4 +505,7 @@ int nfp_bpf_event_output(struct nfp_app_bpf *bpf, const void *data, 
			 unsigned int len);



void nfp_bpf_ctrl_msg_rx(struct nfp_app *app, struct sk_buff *skb);

void

nfp_bpf_ctrl_msg_rx_raw(struct nfp_app *app, const void *data,

			unsigned int len);

#endif