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.h"
42 #include "nfp_net_repr.h"
43 
44 static const struct nfp_app_type *apps[] = {
45 	&app_nic,
46 	&app_bpf,
47 #ifdef CONFIG_NFP_APP_FLOWER
48 	&app_flower,
49 #endif
50 };
51 
52 struct nfp_app *nfp_app_from_netdev(struct net_device *netdev)
53 {
54 	if (nfp_netdev_is_nfp_net(netdev)) {
55 		struct nfp_net *nn = netdev_priv(netdev);
56 
57 		return nn->app;
58 	}
59 
60 	if (nfp_netdev_is_nfp_repr(netdev)) {
61 		struct nfp_repr *repr = netdev_priv(netdev);
62 
63 		return repr->app;
64 	}
65 
66 	WARN(1, "Unknown netdev type for nfp_app\n");
67 
68 	return NULL;
69 }
70 
71 const char *nfp_app_mip_name(struct nfp_app *app)
72 {
73 	if (!app || !app->pf->mip)
74 		return "";
75 	return nfp_mip_name(app->pf->mip);
76 }
77 
78 struct sk_buff *
79 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority)
80 {
81 	struct sk_buff *skb;
82 
83 	if (nfp_app_ctrl_has_meta(app))
84 		size += 8;
85 
86 	skb = alloc_skb(size, priority);
87 	if (!skb)
88 		return NULL;
89 
90 	if (nfp_app_ctrl_has_meta(app))
91 		skb_reserve(skb, 8);
92 
93 	return skb;
94 }
95 
96 struct nfp_reprs *
97 nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
98 		  struct nfp_reprs *reprs)
99 {
100 	struct nfp_reprs *old;
101 
102 	old = rcu_dereference_protected(app->reprs[type],
103 					lockdep_is_held(&app->pf->lock));
104 	if (reprs && old) {
105 		old = ERR_PTR(-EBUSY);
106 		goto exit_unlock;
107 	}
108 
109 	rcu_assign_pointer(app->reprs[type], reprs);
110 
111 exit_unlock:
112 	return old;
113 }
114 
115 struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id)
116 {
117 	struct nfp_app *app;
118 	unsigned int i;
119 
120 	for (i = 0; i < ARRAY_SIZE(apps); i++)
121 		if (apps[i]->id == id)
122 			break;
123 	if (i == ARRAY_SIZE(apps)) {
124 		nfp_err(pf->cpp, "failed to find app with ID 0x%02hhx\n", id);
125 		return ERR_PTR(-EINVAL);
126 	}
127 
128 	if (WARN_ON(!apps[i]->name || !apps[i]->vnic_alloc))
129 		return ERR_PTR(-EINVAL);
130 
131 	app = kzalloc(sizeof(*app), GFP_KERNEL);
132 	if (!app)
133 		return ERR_PTR(-ENOMEM);
134 
135 	app->pf = pf;
136 	app->cpp = pf->cpp;
137 	app->pdev = pf->pdev;
138 	app->type = apps[i];
139 
140 	return app;
141 }
142 
143 void nfp_app_free(struct nfp_app *app)
144 {
145 	kfree(app);
146 }
147