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 u64 *nfp_app_port_get_stats(struct nfp_port *port, u64 *data) 90 { 91 if (!port || !port->app || !port->app->type->port_get_stats) 92 return data; 93 return port->app->type->port_get_stats(port->app, port, data); 94 } 95 96 int nfp_app_port_get_stats_count(struct nfp_port *port) 97 { 98 if (!port || !port->app || !port->app->type->port_get_stats_count) 99 return 0; 100 return port->app->type->port_get_stats_count(port->app, port); 101 } 102 103 u8 *nfp_app_port_get_stats_strings(struct nfp_port *port, u8 *data) 104 { 105 if (!port || !port->app || !port->app->type->port_get_stats_strings) 106 return data; 107 return port->app->type->port_get_stats_strings(port->app, port, data); 108 } 109 110 struct sk_buff * 111 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority) 112 { 113 struct sk_buff *skb; 114 115 if (nfp_app_ctrl_has_meta(app)) 116 size += 8; 117 118 skb = alloc_skb(size, priority); 119 if (!skb) 120 return NULL; 121 122 if (nfp_app_ctrl_has_meta(app)) 123 skb_reserve(skb, 8); 124 125 return skb; 126 } 127 128 struct nfp_reprs * 129 nfp_reprs_get_locked(struct nfp_app *app, enum nfp_repr_type type) 130 { 131 return rcu_dereference_protected(app->reprs[type], 132 lockdep_is_held(&app->pf->lock)); 133 } 134 135 struct nfp_reprs * 136 nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type, 137 struct nfp_reprs *reprs) 138 { 139 struct nfp_reprs *old; 140 141 old = nfp_reprs_get_locked(app, type); 142 rcu_assign_pointer(app->reprs[type], reprs); 143 144 return old; 145 } 146 147 struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id) 148 { 149 struct nfp_app *app; 150 151 if (id >= ARRAY_SIZE(apps) || !apps[id]) { 152 nfp_err(pf->cpp, "unknown FW app ID 0x%02hhx, driver too old or support for FW not built in\n", id); 153 return ERR_PTR(-EINVAL); 154 } 155 156 if (WARN_ON(!apps[id]->name || !apps[id]->vnic_alloc)) 157 return ERR_PTR(-EINVAL); 158 159 app = kzalloc(sizeof(*app), GFP_KERNEL); 160 if (!app) 161 return ERR_PTR(-ENOMEM); 162 163 app->pf = pf; 164 app->cpp = pf->cpp; 165 app->pdev = pf->pdev; 166 app->type = apps[id]; 167 168 return app; 169 } 170 171 void nfp_app_free(struct nfp_app *app) 172 { 173 kfree(app); 174 } 175