nfp: abm: add simple RED offload (8c8e6406) · Commits · 戴 / test

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

+82 −0

Original line number	Diff line number	Diff line
		@@ -38,6 +38,8 @@
		#include <linux/netdevice.h>
		#include <linux/rcupdate.h>
		#include <linux/slab.h>
		#include <net/pkt_cls.h>
		#include <net/pkt_sched.h>

		#include "../nfpcore/nfp.h"
		#include "../nfpcore/nfp_cpp.h"
		@@ -55,6 +57,84 @@ static u32 nfp_abm_portid(enum nfp_repr_type rtype, unsigned int id)
		FIELD_PREP(NFP_ABM_PORTID_ID, id);
		}

		static void
		nfp_abm_red_destroy(struct net_device netdev, struct nfp_abm_link alink,
		u32 handle)
		{
		struct nfp_port *port = nfp_port_from_netdev(netdev);

		if (handle != alink->qdiscs[0].handle)
		return;

		alink->qdiscs[0].handle = TC_H_UNSPEC;
		port->tc_offload_cnt = 0;
		nfp_abm_ctrl_set_all_q_lvls(alink, ~0);
		}

		static int
		nfp_abm_red_replace(struct net_device netdev, struct nfp_abm_link alink,
		struct tc_red_qopt_offload *opt)
		{
		struct nfp_port *port = nfp_port_from_netdev(netdev);
		int err;

		if (opt->set.min != opt->set.max \|\| !opt->set.is_ecn) {
		nfp_warn(alink->abm->app->cpp,
		"RED offload failed - unsupported parameters\n");
		err = -EINVAL;
		goto err_destroy;
		}
		err = nfp_abm_ctrl_set_all_q_lvls(alink, opt->set.min);
		if (err)
		goto err_destroy;

		alink->qdiscs[0].handle = opt->handle;
		port->tc_offload_cnt = 1;

		return 0;
		err_destroy:
		if (alink->qdiscs[0].handle != TC_H_UNSPEC)
		nfp_abm_red_destroy(netdev, alink, alink->qdiscs[0].handle);
		return err;
		}

		static int
		nfp_abm_setup_tc_red(struct net_device netdev, struct nfp_abm_link alink,
		struct tc_red_qopt_offload *opt)
		{
		if (opt->parent != TC_H_ROOT)
		return -EOPNOTSUPP;

		switch (opt->command) {
		case TC_RED_REPLACE:
		return nfp_abm_red_replace(netdev, alink, opt);
		case TC_RED_DESTROY:
		nfp_abm_red_destroy(netdev, alink, opt->handle);
		return 0;
		default:
		return -EOPNOTSUPP;
		}
		}

		static int
		nfp_abm_setup_tc(struct nfp_app app, struct net_device netdev,
		enum tc_setup_type type, void *type_data)
		{
		struct nfp_repr *repr = netdev_priv(netdev);
		struct nfp_port *port;

		port = nfp_port_from_netdev(netdev);
		if (!port \|\| port->type != NFP_PORT_PF_PORT)
		return -EOPNOTSUPP;

		switch (type) {
		case TC_SETUP_QDISC_RED:
		return nfp_abm_setup_tc_red(netdev, repr->app_priv, type_data);
		default:
		return -EOPNOTSUPP;
		}
		}

		static struct net_device nfp_abm_repr_get(struct nfp_app app, u32 port_id)
		{
		enum nfp_repr_type rtype;
		@@ -403,6 +483,8 @@ const struct nfp_app_type app_abm = {
		.vnic_alloc = nfp_abm_vnic_alloc,
		.vnic_free = nfp_abm_vnic_free,

		.setup_tc = nfp_abm_setup_tc,

		.eswitch_mode_get = nfp_abm_eswitch_mode_get,
		.eswitch_mode_set = nfp_abm_eswitch_mode_set,

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

+10 −0

Original line number	Diff line number	Diff line
		@@ -58,18 +58,28 @@ struct nfp_abm {
		const struct nfp_rtsym *q_lvls;
		};

		/**
		* struct nfp_red_qdisc - representation of single RED Qdisc
		* @handle: handle of currently offloaded RED Qdisc
		*/
		struct nfp_red_qdisc {
		u32 handle;
		};

		/**
		* struct nfp_abm_link - port tuple of a ABM NIC
		* @abm: back pointer to nfp_abm
		* @vnic: data vNIC
		* @id: id of the data vNIC
		* @queue_base: id of base to host queue within PCIe (not QC idx)
		* @qdiscs: array of qdiscs
		*/
		struct nfp_abm_link {
		struct nfp_abm *abm;
		struct nfp_net *vnic;
		unsigned int id;
		unsigned int queue_base;
		struct nfp_red_qdisc qdiscs[1];
		};

		void nfp_abm_ctrl_read_params(struct nfp_abm_link *alink);

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