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1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)2/* Copyright (C) 2017-2018 Netronome Systems, Inc. */3 4#include <linux/bug.h>5#include <linux/lockdep.h>6#include <linux/rcupdate.h>7#include <linux/skbuff.h>8#include <linux/slab.h>9 10#include "nfpcore/nfp_cpp.h"11#include "nfpcore/nfp_nffw.h"12#include "nfp_app.h"13#include "nfp_main.h"14#include "nfp_net.h"15#include "nfp_net_repr.h"16#include "nfp_port.h"17 18static const struct nfp_app_type *apps[] = {19	[NFP_APP_CORE_NIC]	= &app_nic,20#ifdef CONFIG_BPF_SYSCALL21	[NFP_APP_BPF_NIC]	= &app_bpf,22#else23	[NFP_APP_BPF_NIC]	= &app_nic,24#endif25#ifdef CONFIG_NFP_APP_FLOWER26	[NFP_APP_FLOWER_NIC]	= &app_flower,27#endif28#ifdef CONFIG_NFP_APP_ABM_NIC29	[NFP_APP_ACTIVE_BUFFER_MGMT_NIC] = &app_abm,30#endif31};32 33void nfp_check_rhashtable_empty(void *ptr, void *arg)34{35	WARN_ON_ONCE(1);36}37 38struct nfp_app *nfp_app_from_netdev(struct net_device *netdev)39{40	if (nfp_netdev_is_nfp_net(netdev)) {41		struct nfp_net *nn = netdev_priv(netdev);42 43		return nn->app;44	}45 46	if (nfp_netdev_is_nfp_repr(netdev)) {47		struct nfp_repr *repr = netdev_priv(netdev);48 49		return repr->app;50	}51 52	WARN(1, "Unknown netdev type for nfp_app\n");53 54	return NULL;55}56 57const char *nfp_app_mip_name(struct nfp_app *app)58{59	if (!app || !app->pf->mip)60		return "";61	return nfp_mip_name(app->pf->mip);62}63 64int nfp_app_ndo_init(struct net_device *netdev)65{66	struct nfp_app *app = nfp_app_from_netdev(netdev);67 68	if (!app || !app->type->ndo_init)69		return 0;70	return app->type->ndo_init(app, netdev);71}72 73void nfp_app_ndo_uninit(struct net_device *netdev)74{75	struct nfp_app *app = nfp_app_from_netdev(netdev);76 77	if (app && app->type->ndo_uninit)78		app->type->ndo_uninit(app, netdev);79}80 81u64 *nfp_app_port_get_stats(struct nfp_port *port, u64 *data)82{83	if (!port || !port->app || !port->app->type->port_get_stats)84		return data;85	return port->app->type->port_get_stats(port->app, port, data);86}87 88int nfp_app_port_get_stats_count(struct nfp_port *port)89{90	if (!port || !port->app || !port->app->type->port_get_stats_count)91		return 0;92	return port->app->type->port_get_stats_count(port->app, port);93}94 95u8 *nfp_app_port_get_stats_strings(struct nfp_port *port, u8 *data)96{97	if (!port || !port->app || !port->app->type->port_get_stats_strings)98		return data;99	return port->app->type->port_get_stats_strings(port->app, port, data);100}101 102struct sk_buff *103nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority)104{105	struct sk_buff *skb;106 107	if (nfp_app_ctrl_has_meta(app))108		size += 8;109 110	skb = alloc_skb(size, priority);111	if (!skb)112		return NULL;113 114	if (nfp_app_ctrl_has_meta(app))115		skb_reserve(skb, 8);116 117	return skb;118}119 120struct nfp_reprs *121nfp_reprs_get_locked(struct nfp_app *app, enum nfp_repr_type type)122{123	return rcu_dereference_protected(app->reprs[type],124					 nfp_app_is_locked(app));125}126 127struct nfp_reprs *128nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,129		  struct nfp_reprs *reprs)130{131	struct nfp_reprs *old;132 133	old = nfp_reprs_get_locked(app, type);134	rtnl_lock();135	rcu_assign_pointer(app->reprs[type], reprs);136	rtnl_unlock();137 138	return old;139}140 141static void142nfp_app_netdev_feat_change(struct nfp_app *app, struct net_device *netdev)143{144	struct nfp_net *nn;145	unsigned int type;146 147	if (!nfp_netdev_is_nfp_net(netdev))148		return;149	nn = netdev_priv(netdev);150	if (nn->app != app)151		return;152 153	for (type = 0; type < __NFP_REPR_TYPE_MAX; type++) {154		struct nfp_reprs *reprs;155		unsigned int i;156 157		reprs = rtnl_dereference(app->reprs[type]);158		if (!reprs)159			continue;160 161		for (i = 0; i < reprs->num_reprs; i++) {162			struct net_device *repr;163 164			repr = rtnl_dereference(reprs->reprs[i]);165			if (!repr)166				continue;167 168			nfp_repr_transfer_features(repr, netdev);169		}170	}171}172 173static int174nfp_app_netdev_event(struct notifier_block *nb, unsigned long event, void *ptr)175{176	struct net_device *netdev;177	struct nfp_app *app;178 179	netdev = netdev_notifier_info_to_dev(ptr);180	app = container_of(nb, struct nfp_app, netdev_nb);181 182	/* Handle events common code is interested in */183	switch (event) {184	case NETDEV_FEAT_CHANGE:185		nfp_app_netdev_feat_change(app, netdev);186		break;187	}188 189	/* Call offload specific handlers */190	if (app->type->netdev_event)191		return app->type->netdev_event(app, netdev, event, ptr);192	return NOTIFY_DONE;193}194 195int nfp_app_start(struct nfp_app *app, struct nfp_net *ctrl)196{197	int err;198 199	app->ctrl = ctrl;200 201	if (app->type->start) {202		err = app->type->start(app);203		if (err)204			return err;205	}206 207	app->netdev_nb.notifier_call = nfp_app_netdev_event;208	err = register_netdevice_notifier(&app->netdev_nb);209	if (err)210		goto err_app_stop;211 212	return 0;213 214err_app_stop:215	if (app->type->stop)216		app->type->stop(app);217	return err;218}219 220void nfp_app_stop(struct nfp_app *app)221{222	unregister_netdevice_notifier(&app->netdev_nb);223 224	if (app->type->stop)225		app->type->stop(app);226}227 228struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id)229{230	struct nfp_app *app;231 232	if (id >= ARRAY_SIZE(apps) || !apps[id]) {233		nfp_err(pf->cpp, "unknown FW app ID 0x%02x, driver too old or support for FW not built in\n", id);234		return ERR_PTR(-EINVAL);235	}236 237	if (WARN_ON(!apps[id]->name || !apps[id]->vnic_alloc))238		return ERR_PTR(-EINVAL);239	if (WARN_ON(!apps[id]->ctrl_msg_rx && apps[id]->ctrl_msg_rx_raw))240		return ERR_PTR(-EINVAL);241 242	app = kzalloc(sizeof(*app), GFP_KERNEL);243	if (!app)244		return ERR_PTR(-ENOMEM);245 246	app->pf = pf;247	app->cpp = pf->cpp;248	app->pdev = pf->pdev;249	app->type = apps[id];250 251	return app;252}253 254void nfp_app_free(struct nfp_app *app)255{256	kfree(app);257}258