1 /* 2 * Copyright (C) 2017-2018 Netronome Systems, Inc. 3 * 4 * This software is dual licensed under the GNU General License Version 2, 5 * June 1991 as shown in the file COPYING in the top-level directory of this 6 * source tree or the BSD 2-Clause License provided below. You have the 7 * option to license this software under the complete terms of either license. 8 * 9 * The BSD 2-Clause License: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * 2. Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/bug.h> 35 #include <linux/lockdep.h> 36 #include <linux/rcupdate.h> 37 #include <linux/skbuff.h> 38 #include <linux/slab.h> 39 40 #include "nfpcore/nfp_cpp.h" 41 #include "nfpcore/nfp_nffw.h" 42 #include "nfp_app.h" 43 #include "nfp_main.h" 44 #include "nfp_net.h" 45 #include "nfp_net_repr.h" 46 #include "nfp_port.h" 47 48 static const struct nfp_app_type *apps[] = { 49 [NFP_APP_CORE_NIC] = &app_nic, 50 #ifdef CONFIG_BPF_SYSCALL 51 [NFP_APP_BPF_NIC] = &app_bpf, 52 #else 53 [NFP_APP_BPF_NIC] = &app_nic, 54 #endif 55 #ifdef CONFIG_NFP_APP_FLOWER 56 [NFP_APP_FLOWER_NIC] = &app_flower, 57 #endif 58 #ifdef CONFIG_NFP_APP_ABM_NIC 59 [NFP_APP_ACTIVE_BUFFER_MGMT_NIC] = &app_abm, 60 #endif 61 }; 62 63 struct nfp_app *nfp_app_from_netdev(struct net_device *netdev) 64 { 65 if (nfp_netdev_is_nfp_net(netdev)) { 66 struct nfp_net *nn = netdev_priv(netdev); 67 68 return nn->app; 69 } 70 71 if (nfp_netdev_is_nfp_repr(netdev)) { 72 struct nfp_repr *repr = netdev_priv(netdev); 73 74 return repr->app; 75 } 76 77 WARN(1, "Unknown netdev type for nfp_app\n"); 78 79 return NULL; 80 } 81 82 const char *nfp_app_mip_name(struct nfp_app *app) 83 { 84 if (!app || !app->pf->mip) 85 return ""; 86 return nfp_mip_name(app->pf->mip); 87 } 88 89 int nfp_app_ndo_init(struct net_device *netdev) 90 { 91 struct nfp_app *app = nfp_app_from_netdev(netdev); 92 93 if (!app || !app->type->ndo_init) 94 return 0; 95 return app->type->ndo_init(app, netdev); 96 } 97 98 void nfp_app_ndo_uninit(struct net_device *netdev) 99 { 100 struct nfp_app *app = nfp_app_from_netdev(netdev); 101 102 if (app && app->type->ndo_uninit) 103 app->type->ndo_uninit(app, netdev); 104 } 105 106 u64 *nfp_app_port_get_stats(struct nfp_port *port, u64 *data) 107 { 108 if (!port || !port->app || !port->app->type->port_get_stats) 109 return data; 110 return port->app->type->port_get_stats(port->app, port, data); 111 } 112 113 int nfp_app_port_get_stats_count(struct nfp_port *port) 114 { 115 if (!port || !port->app || !port->app->type->port_get_stats_count) 116 return 0; 117 return port->app->type->port_get_stats_count(port->app, port); 118 } 119 120 u8 *nfp_app_port_get_stats_strings(struct nfp_port *port, u8 *data) 121 { 122 if (!port || !port->app || !port->app->type->port_get_stats_strings) 123 return data; 124 return port->app->type->port_get_stats_strings(port->app, port, data); 125 } 126 127 struct sk_buff * 128 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority) 129 { 130 struct sk_buff *skb; 131 132 if (nfp_app_ctrl_has_meta(app)) 133 size += 8; 134 135 skb = alloc_skb(size, priority); 136 if (!skb) 137 return NULL; 138 139 if (nfp_app_ctrl_has_meta(app)) 140 skb_reserve(skb, 8); 141 142 return skb; 143 } 144 145 struct nfp_reprs * 146 nfp_reprs_get_locked(struct nfp_app *app, enum nfp_repr_type type) 147 { 148 return rcu_dereference_protected(app->reprs[type], 149 lockdep_is_held(&app->pf->lock)); 150 } 151 152 struct nfp_reprs * 153 nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type, 154 struct nfp_reprs *reprs) 155 { 156 struct nfp_reprs *old; 157 158 old = nfp_reprs_get_locked(app, type); 159 rcu_assign_pointer(app->reprs[type], reprs); 160 161 return old; 162 } 163 164 struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id) 165 { 166 struct nfp_app *app; 167 168 if (id >= ARRAY_SIZE(apps) || !apps[id]) { 169 nfp_err(pf->cpp, "unknown FW app ID 0x%02hhx, driver too old or support for FW not built in\n", id); 170 return ERR_PTR(-EINVAL); 171 } 172 173 if (WARN_ON(!apps[id]->name || !apps[id]->vnic_alloc)) 174 return ERR_PTR(-EINVAL); 175 if (WARN_ON(!apps[id]->ctrl_msg_rx && apps[id]->ctrl_msg_rx_raw)) 176 return ERR_PTR(-EINVAL); 177 178 app = kzalloc(sizeof(*app), GFP_KERNEL); 179 if (!app) 180 return ERR_PTR(-ENOMEM); 181 182 app->pf = pf; 183 app->cpp = pf->cpp; 184 app->pdev = pf->pdev; 185 app->type = apps[id]; 186 187 return app; 188 } 189 190 void nfp_app_free(struct nfp_app *app) 191 { 192 kfree(app); 193 } 194