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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2017-2018 Netronome Systems, Inc. */
#include <linux/bug.h>
#include <linux/lockdep.h>
#include <linux/rcupdate.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include "nfpcore/nfp_cpp.h"
#include "nfpcore/nfp_nffw.h"
#include "nfp_app.h"
#include "nfp_main.h"
#include "nfp_net.h"
#include "nfp_net_repr.h"
#include "nfp_port.h"
static const struct nfp_app_type *apps[] = {
[NFP_APP_CORE_NIC] = &app_nic,
#ifdef CONFIG_BPF_SYSCALL
[NFP_APP_BPF_NIC] = &app_bpf,
#else
[NFP_APP_BPF_NIC] = &app_nic,
#endif
#ifdef CONFIG_NFP_APP_FLOWER
[NFP_APP_FLOWER_NIC] = &app_flower,
#endif
#ifdef CONFIG_NFP_APP_ABM_NIC
[NFP_APP_ACTIVE_BUFFER_MGMT_NIC] = &app_abm,
#endif
};
void nfp_check_rhashtable_empty(void *ptr, void *arg)
{
WARN_ON_ONCE(1);
}
struct nfp_app *nfp_app_from_netdev(struct net_device *netdev)
{
if (nfp_netdev_is_nfp_net(netdev)) {
struct nfp_net *nn = netdev_priv(netdev);
return nn->app;
}
if (nfp_netdev_is_nfp_repr(netdev)) {
struct nfp_repr *repr = netdev_priv(netdev);
return repr->app;
}
WARN(1, "Unknown netdev type for nfp_app\n");
return NULL;
}
const char *nfp_app_mip_name(struct nfp_app *app)
{
if (!app || !app->pf->mip)
return "";
return nfp_mip_name(app->pf->mip);
}
int nfp_app_ndo_init(struct net_device *netdev)
{
struct nfp_app *app = nfp_app_from_netdev(netdev);
if (!app || !app->type->ndo_init)
return 0;
return app->type->ndo_init(app, netdev);
}
void nfp_app_ndo_uninit(struct net_device *netdev)
{
struct nfp_app *app = nfp_app_from_netdev(netdev);
if (app && app->type->ndo_uninit)
app->type->ndo_uninit(app, netdev);
}
u64 *nfp_app_port_get_stats(struct nfp_port *port, u64 *data)
{
if (!port || !port->app || !port->app->type->port_get_stats)
return data;
return port->app->type->port_get_stats(port->app, port, data);
}
int nfp_app_port_get_stats_count(struct nfp_port *port)
{
if (!port || !port->app || !port->app->type->port_get_stats_count)
return 0;
return port->app->type->port_get_stats_count(port->app, port);
}
u8 *nfp_app_port_get_stats_strings(struct nfp_port *port, u8 *data)
{
if (!port || !port->app || !port->app->type->port_get_stats_strings)
return data;
return port->app->type->port_get_stats_strings(port->app, port, data);
}
struct sk_buff *
nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority)
{
struct sk_buff *skb;
if (nfp_app_ctrl_has_meta(app))
size += 8;
skb = alloc_skb(size, priority);
if (!skb)
return NULL;
if (nfp_app_ctrl_has_meta(app))
skb_reserve(skb, 8);
return skb;
}
struct nfp_reprs *
nfp_reprs_get_locked(struct nfp_app *app, enum nfp_repr_type type)
{
return rcu_dereference_protected(app->reprs[type],
lockdep_is_held(&app->pf->lock));
}
struct nfp_reprs *
nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
struct nfp_reprs *reprs)
{
struct nfp_reprs *old;
old = nfp_reprs_get_locked(app, type);
rtnl_lock();
rcu_assign_pointer(app->reprs[type], reprs);
rtnl_unlock();
return old;
}
static void
nfp_app_netdev_feat_change(struct nfp_app *app, struct net_device *netdev)
{
struct nfp_net *nn;
unsigned int type;
if (!nfp_netdev_is_nfp_net(netdev))
return;
nn = netdev_priv(netdev);
if (nn->app != app)
return;
for (type = 0; type < __NFP_REPR_TYPE_MAX; type++) {
struct nfp_reprs *reprs;
unsigned int i;
reprs = rtnl_dereference(app->reprs[type]);
if (!reprs)
continue;
for (i = 0; i < reprs->num_reprs; i++) {
struct net_device *repr;
repr = rtnl_dereference(reprs->reprs[i]);
if (!repr)
continue;
nfp_repr_transfer_features(repr, netdev);
}
}
}
static int
nfp_app_netdev_event(struct notifier_block *nb, unsigned long event, void *ptr)
{
struct net_device *netdev;
struct nfp_app *app;
netdev = netdev_notifier_info_to_dev(ptr);
app = container_of(nb, struct nfp_app, netdev_nb);
/* Handle events common code is interested in */
switch (event) {
case NETDEV_FEAT_CHANGE:
nfp_app_netdev_feat_change(app, netdev);
break;
}
/* Call offload specific handlers */
if (app->type->netdev_event)
return app->type->netdev_event(app, netdev, event, ptr);
return NOTIFY_DONE;
}
int nfp_app_start(struct nfp_app *app, struct nfp_net *ctrl)
{
int err;
app->ctrl = ctrl;
if (app->type->start) {
err = app->type->start(app);
if (err)
return err;
}
app->netdev_nb.notifier_call = nfp_app_netdev_event;
err = register_netdevice_notifier(&app->netdev_nb);
if (err)
goto err_app_stop;
return 0;
err_app_stop:
if (app->type->stop)
app->type->stop(app);
return err;
}
void nfp_app_stop(struct nfp_app *app)
{
unregister_netdevice_notifier(&app->netdev_nb);
if (app->type->stop)
app->type->stop(app);
}
struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id)
{
struct nfp_app *app;
if (id >= ARRAY_SIZE(apps) || !apps[id]) {
nfp_err(pf->cpp, "unknown FW app ID 0x%02hhx, driver too old or support for FW not built in\n", id);
return ERR_PTR(-EINVAL);
}
if (WARN_ON(!apps[id]->name || !apps[id]->vnic_alloc))
return ERR_PTR(-EINVAL);
if (WARN_ON(!apps[id]->ctrl_msg_rx && apps[id]->ctrl_msg_rx_raw))
return ERR_PTR(-EINVAL);
app = kzalloc(sizeof(*app), GFP_KERNEL);
if (!app)
return ERR_PTR(-ENOMEM);
app->pf = pf;
app->cpp = pf->cpp;
app->pdev = pf->pdev;
app->type = apps[id];
return app;
}
void nfp_app_free(struct nfp_app *app)
{
kfree(app);
}
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