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 18 static const struct nfp_app_type *apps[] = { 19 [NFP_APP_CORE_NIC] = &app_nic, 20 #ifdef CONFIG_BPF_SYSCALL 21 [NFP_APP_BPF_NIC] = &app_bpf, 22 #else 23 [NFP_APP_BPF_NIC] = &app_nic, 24 #endif 25 #ifdef CONFIG_NFP_APP_FLOWER 26 [NFP_APP_FLOWER_NIC] = &app_flower, 27 #endif 28 #ifdef CONFIG_NFP_APP_ABM_NIC 29 [NFP_APP_ACTIVE_BUFFER_MGMT_NIC] = &app_abm, 30 #endif 31 }; 32 33 void nfp_check_rhashtable_empty(void *ptr, void *arg) 34 { 35 WARN_ON_ONCE(1); 36 } 37 38 struct 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 57 const 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 64 int 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 73 void 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 81 u64 *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 88 int 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 95 u8 *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 } 101 102 struct sk_buff * 103 nfp_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 } 119 120 struct nfp_reprs * 121 nfp_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 } 126 127 struct nfp_reprs * 128 nfp_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 } 140 141 static void 142 nfp_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 } 172 173 static int 174 nfp_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 } 194 195 int 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; 213 214 err_app_stop: 215 if (app->type->stop) 216 app->type->stop(app); 217 return err; 218 } 219 220 void 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 } 227 228 struct 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%02hhx, 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 } 253 254 void nfp_app_free(struct nfp_app *app) 255 { 256 kfree(app); 257 } 258