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/bug.h>
35 #include <linux/skbuff.h>
36 #include <linux/slab.h>
37 
38 #include "nfpcore/nfp_cpp.h"
39 #include "nfpcore/nfp_nffw.h"
40 #include "nfp_app.h"
41 #include "nfp_main.h"
42 #include "nfp_net.h"
43 #include "nfp_net_repr.h"
44 
45 static const struct nfp_app_type *apps[] = {
46 	[NFP_APP_CORE_NIC]	= &app_nic,
47 #ifdef CONFIG_BPF_SYSCALL
48 	[NFP_APP_BPF_NIC]	= &app_bpf,
49 #else
50 	[NFP_APP_BPF_NIC]	= &app_nic,
51 #endif
52 #ifdef CONFIG_NFP_APP_FLOWER
53 	[NFP_APP_FLOWER_NIC]	= &app_flower,
54 #endif
55 };
56 
57 struct nfp_app *nfp_app_from_netdev(struct net_device *netdev)
58 {
59 	if (nfp_netdev_is_nfp_net(netdev)) {
60 		struct nfp_net *nn = netdev_priv(netdev);
61 
62 		return nn->app;
63 	}
64 
65 	if (nfp_netdev_is_nfp_repr(netdev)) {
66 		struct nfp_repr *repr = netdev_priv(netdev);
67 
68 		return repr->app;
69 	}
70 
71 	WARN(1, "Unknown netdev type for nfp_app\n");
72 
73 	return NULL;
74 }
75 
76 const char *nfp_app_mip_name(struct nfp_app *app)
77 {
78 	if (!app || !app->pf->mip)
79 		return "";
80 	return nfp_mip_name(app->pf->mip);
81 }
82 
83 struct sk_buff *
84 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority)
85 {
86 	struct sk_buff *skb;
87 
88 	if (nfp_app_ctrl_has_meta(app))
89 		size += 8;
90 
91 	skb = alloc_skb(size, priority);
92 	if (!skb)
93 		return NULL;
94 
95 	if (nfp_app_ctrl_has_meta(app))
96 		skb_reserve(skb, 8);
97 
98 	return skb;
99 }
100 
101 struct nfp_reprs *
102 nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
103 		  struct nfp_reprs *reprs)
104 {
105 	struct nfp_reprs *old;
106 
107 	old = rcu_dereference_protected(app->reprs[type],
108 					lockdep_is_held(&app->pf->lock));
109 	rcu_assign_pointer(app->reprs[type], reprs);
110 
111 	return old;
112 }
113 
114 struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id)
115 {
116 	struct nfp_app *app;
117 
118 	if (id >= ARRAY_SIZE(apps) || !apps[id]) {
119 		nfp_err(pf->cpp, "failed to find app with ID 0x%02hhx\n", id);
120 		return ERR_PTR(-EINVAL);
121 	}
122 
123 	if (WARN_ON(!apps[id]->name || !apps[id]->vnic_alloc))
124 		return ERR_PTR(-EINVAL);
125 
126 	app = kzalloc(sizeof(*app), GFP_KERNEL);
127 	if (!app)
128 		return ERR_PTR(-ENOMEM);
129 
130 	app->pf = pf;
131 	app->cpp = pf->cpp;
132 	app->pdev = pf->pdev;
133 	app->type = apps[id];
134 
135 	return app;
136 }
137 
138 void nfp_app_free(struct nfp_app *app)
139 {
140 	kfree(app);
141 }
142