1 /******************************************************************************
2  *
3  * Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved.
4  * Copyright(C) 2016 Intel Deutschland GmbH
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of version 2 of the GNU General Public License as
8  * published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but WITHOUT
11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13  * more details.
14  *
15  * You should have received a copy of the GNU General Public License along with
16  * this program; if not, write to the Free Software Foundation, Inc.,
17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
18  *
19  * The full GNU General Public License is included in this distribution in the
20  * file called LICENSE.
21  *
22  * Contact Information:
23  *  Intel Linux Wireless <linuxwifi@intel.com>
24  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25  *
26  *****************************************************************************/
27 
28 #ifndef __IWLWIFI_DEVICE_TRACE
29 #include <linux/skbuff.h>
30 #include <linux/ieee80211.h>
31 #include <net/cfg80211.h>
32 #include "iwl-trans.h"
33 #if !defined(__IWLWIFI_DEVICE_TRACE)
34 static inline bool iwl_trace_data(struct sk_buff *skb)
35 {
36 	struct ieee80211_hdr *hdr = (void *)skb->data;
37 	__le16 fc = hdr->frame_control;
38 	int offs = 24; /* start with normal header length */
39 
40 	if (!ieee80211_is_data(fc))
41 		return false;
42 
43 	/* Try to determine if the frame is EAPOL. This might have false
44 	 * positives (if there's no RFC 1042 header and we compare to some
45 	 * payload instead) but since we're only doing tracing that's not
46 	 * a problem.
47 	 */
48 
49 	if (ieee80211_has_a4(fc))
50 		offs += 6;
51 	if (ieee80211_is_data_qos(fc))
52 		offs += 2;
53 	/* don't account for crypto - these are unencrypted */
54 
55 	/* also account for the RFC 1042 header, of course */
56 	offs += 6;
57 
58 	return skb->len <= offs + 2 ||
59 		*(__be16 *)(skb->data + offs) != cpu_to_be16(ETH_P_PAE);
60 }
61 
62 static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans,
63 				      void *rxbuf, size_t len)
64 {
65 	struct iwl_cmd_header *cmd = (void *)((u8 *)rxbuf + sizeof(__le32));
66 	struct ieee80211_hdr *hdr;
67 
68 	if (cmd->cmd != trans->rx_mpdu_cmd)
69 		return len;
70 
71 	hdr = (void *)((u8 *)cmd + sizeof(struct iwl_cmd_header) +
72 			trans->rx_mpdu_cmd_hdr_size);
73 	if (!ieee80211_is_data(hdr->frame_control))
74 		return len;
75 	/* maybe try to identify EAPOL frames? */
76 	return sizeof(__le32) + sizeof(*cmd) + trans->rx_mpdu_cmd_hdr_size +
77 		ieee80211_hdrlen(hdr->frame_control);
78 }
79 #endif
80 
81 #define __IWLWIFI_DEVICE_TRACE
82 
83 #include <linux/tracepoint.h>
84 #include <linux/device.h>
85 #include "iwl-trans.h"
86 
87 
88 #if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
89 #undef TRACE_EVENT
90 #define TRACE_EVENT(name, proto, ...) \
91 static inline void trace_ ## name(proto) {}
92 #undef DECLARE_EVENT_CLASS
93 #define DECLARE_EVENT_CLASS(...)
94 #undef DEFINE_EVENT
95 #define DEFINE_EVENT(evt_class, name, proto, ...) \
96 static inline void trace_ ## name(proto) {}
97 #endif
98 
99 #define DEV_ENTRY	__string(dev, dev_name(dev))
100 #define DEV_ASSIGN	__assign_str(dev, dev_name(dev))
101 
102 #include "iwl-devtrace-io.h"
103 #include "iwl-devtrace-ucode.h"
104 #include "iwl-devtrace-msg.h"
105 #include "iwl-devtrace-data.h"
106 #include "iwl-devtrace-iwlwifi.h"
107 
108 #endif /* __IWLWIFI_DEVICE_TRACE */
109