1 /* 2 * Copyright (C) 2017 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/skbuff.h> 35 #include <linux/slab.h> 36 37 #include "nfpcore/nfp_cpp.h" 38 #include "nfpcore/nfp_nffw.h" 39 #include "nfp_app.h" 40 #include "nfp_main.h" 41 #include "nfp_net_repr.h" 42 43 static const struct nfp_app_type *apps[] = { 44 &app_nic, 45 &app_bpf, 46 #ifdef CONFIG_NFP_APP_FLOWER 47 &app_flower, 48 #endif 49 }; 50 51 const char *nfp_app_mip_name(struct nfp_app *app) 52 { 53 if (!app || !app->pf->mip) 54 return ""; 55 return nfp_mip_name(app->pf->mip); 56 } 57 58 struct sk_buff * 59 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority) 60 { 61 struct sk_buff *skb; 62 63 if (nfp_app_ctrl_has_meta(app)) 64 size += 8; 65 66 skb = alloc_skb(size, priority); 67 if (!skb) 68 return NULL; 69 70 if (nfp_app_ctrl_has_meta(app)) 71 skb_reserve(skb, 8); 72 73 return skb; 74 } 75 76 struct nfp_reprs * 77 nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type, 78 struct nfp_reprs *reprs) 79 { 80 struct nfp_reprs *old; 81 82 old = rcu_dereference_protected(app->reprs[type], 83 lockdep_is_held(&app->pf->lock)); 84 if (reprs && old) { 85 old = ERR_PTR(-EBUSY); 86 goto exit_unlock; 87 } 88 89 rcu_assign_pointer(app->reprs[type], reprs); 90 91 exit_unlock: 92 return old; 93 } 94 95 struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id) 96 { 97 struct nfp_app *app; 98 unsigned int i; 99 100 for (i = 0; i < ARRAY_SIZE(apps); i++) 101 if (apps[i]->id == id) 102 break; 103 if (i == ARRAY_SIZE(apps)) { 104 nfp_err(pf->cpp, "failed to find app with ID 0x%02hhx\n", id); 105 return ERR_PTR(-EINVAL); 106 } 107 108 if (WARN_ON(!apps[i]->name || !apps[i]->vnic_init)) 109 return ERR_PTR(-EINVAL); 110 111 app = kzalloc(sizeof(*app), GFP_KERNEL); 112 if (!app) 113 return ERR_PTR(-ENOMEM); 114 115 app->pf = pf; 116 app->cpp = pf->cpp; 117 app->pdev = pf->pdev; 118 app->type = apps[i]; 119 120 return app; 121 } 122 123 void nfp_app_free(struct nfp_app *app) 124 { 125 kfree(app); 126 } 127