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/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 
47 static const struct nfp_app_type *apps[] = {
48 	[NFP_APP_CORE_NIC]	= &app_nic,
49 #ifdef CONFIG_BPF_SYSCALL
50 	[NFP_APP_BPF_NIC]	= &app_bpf,
51 #else
52 	[NFP_APP_BPF_NIC]	= &app_nic,
53 #endif
54 #ifdef CONFIG_NFP_APP_FLOWER
55 	[NFP_APP_FLOWER_NIC]	= &app_flower,
56 #endif
57 };
58 
59 struct nfp_app *nfp_app_from_netdev(struct net_device *netdev)
60 {
61 	if (nfp_netdev_is_nfp_net(netdev)) {
62 		struct nfp_net *nn = netdev_priv(netdev);
63 
64 		return nn->app;
65 	}
66 
67 	if (nfp_netdev_is_nfp_repr(netdev)) {
68 		struct nfp_repr *repr = netdev_priv(netdev);
69 
70 		return repr->app;
71 	}
72 
73 	WARN(1, "Unknown netdev type for nfp_app\n");
74 
75 	return NULL;
76 }
77 
78 const char *nfp_app_mip_name(struct nfp_app *app)
79 {
80 	if (!app || !app->pf->mip)
81 		return "";
82 	return nfp_mip_name(app->pf->mip);
83 }
84 
85 struct sk_buff *
86 nfp_app_ctrl_msg_alloc(struct nfp_app *app, unsigned int size, gfp_t priority)
87 {
88 	struct sk_buff *skb;
89 
90 	if (nfp_app_ctrl_has_meta(app))
91 		size += 8;
92 
93 	skb = alloc_skb(size, priority);
94 	if (!skb)
95 		return NULL;
96 
97 	if (nfp_app_ctrl_has_meta(app))
98 		skb_reserve(skb, 8);
99 
100 	return skb;
101 }
102 
103 struct nfp_reprs *
104 nfp_reprs_get_locked(struct nfp_app *app, enum nfp_repr_type type)
105 {
106 	return rcu_dereference_protected(app->reprs[type],
107 					 lockdep_is_held(&app->pf->lock));
108 }
109 
110 struct nfp_reprs *
111 nfp_app_reprs_set(struct nfp_app *app, enum nfp_repr_type type,
112 		  struct nfp_reprs *reprs)
113 {
114 	struct nfp_reprs *old;
115 
116 	old = nfp_reprs_get_locked(app, type);
117 	rcu_assign_pointer(app->reprs[type], reprs);
118 
119 	return old;
120 }
121 
122 struct nfp_app *nfp_app_alloc(struct nfp_pf *pf, enum nfp_app_id id)
123 {
124 	struct nfp_app *app;
125 
126 	if (id >= ARRAY_SIZE(apps) || !apps[id]) {
127 		nfp_err(pf->cpp, "unknown FW app ID 0x%02hhx, driver too old or support for FW not built in\n", id);
128 		return ERR_PTR(-EINVAL);
129 	}
130 
131 	if (WARN_ON(!apps[id]->name || !apps[id]->vnic_alloc))
132 		return ERR_PTR(-EINVAL);
133 
134 	app = kzalloc(sizeof(*app), GFP_KERNEL);
135 	if (!app)
136 		return ERR_PTR(-ENOMEM);
137 
138 	app->pf = pf;
139 	app->cpp = pf->cpp;
140 	app->pdev = pf->pdev;
141 	app->type = apps[id];
142 
143 	return app;
144 }
145 
146 void nfp_app_free(struct nfp_app *app)
147 {
148 	kfree(app);
149 }
150