diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfp_app.c')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_app.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.c b/drivers/net/ethernet/netronome/nfp/nfp_app.c new file mode 100644 index 000000000..bb3f46c74 --- /dev/null +++ b/drivers/net/ethernet/netronome/nfp/nfp_app.c @@ -0,0 +1,257 @@ +// 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], + nfp_app_is_locked(app)); +} + +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%02x, 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); +} |