1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /******************************************************************************
3  *
4  * Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved.
5  * Copyright(C) 2016        Intel Deutschland GmbH
6  * Copyright(c) 2018        Intel Corporation
7  *
8  * Contact Information:
9  *  Intel Linux Wireless <linuxwifi@intel.com>
10  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
11  *
12  *****************************************************************************/
13 
14 #ifndef __IWLWIFI_DEVICE_TRACE
15 #include <linux/skbuff.h>
16 #include <linux/ieee80211.h>
17 #include <net/cfg80211.h>
18 #include "iwl-trans.h"
19 #if !defined(__IWLWIFI_DEVICE_TRACE)
20 static inline bool iwl_trace_data(struct sk_buff *skb)
21 {
22 	struct ieee80211_hdr *hdr = (void *)skb->data;
23 	__le16 fc = hdr->frame_control;
24 	int offs = 24; /* start with normal header length */
25 
26 	if (!ieee80211_is_data(fc))
27 		return false;
28 
29 	/* Try to determine if the frame is EAPOL. This might have false
30 	 * positives (if there's no RFC 1042 header and we compare to some
31 	 * payload instead) but since we're only doing tracing that's not
32 	 * a problem.
33 	 */
34 
35 	if (ieee80211_has_a4(fc))
36 		offs += 6;
37 	if (ieee80211_is_data_qos(fc))
38 		offs += 2;
39 	/* don't account for crypto - these are unencrypted */
40 
41 	/* also account for the RFC 1042 header, of course */
42 	offs += 6;
43 
44 	return skb->len <= offs + 2 ||
45 		*(__be16 *)(skb->data + offs) != cpu_to_be16(ETH_P_PAE);
46 }
47 
48 static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans,
49 				      void *rxbuf, size_t len,
50 				      size_t *out_hdr_offset)
51 {
52 	struct iwl_cmd_header *cmd = (void *)((u8 *)rxbuf + sizeof(__le32));
53 	struct ieee80211_hdr *hdr = NULL;
54 	size_t hdr_offset;
55 
56 	if (cmd->cmd != trans->rx_mpdu_cmd)
57 		return len;
58 
59 	hdr_offset = sizeof(struct iwl_cmd_header) +
60 		     trans->rx_mpdu_cmd_hdr_size;
61 
62 	if (out_hdr_offset)
63 		*out_hdr_offset = hdr_offset;
64 
65 	hdr = (void *)((u8 *)cmd + hdr_offset);
66 	if (!ieee80211_is_data(hdr->frame_control))
67 		return len;
68 	/* maybe try to identify EAPOL frames? */
69 	return sizeof(__le32) + sizeof(*cmd) + trans->rx_mpdu_cmd_hdr_size +
70 		ieee80211_hdrlen(hdr->frame_control);
71 }
72 #endif
73 
74 #define __IWLWIFI_DEVICE_TRACE
75 
76 #include <linux/tracepoint.h>
77 #include <linux/device.h>
78 #include "iwl-trans.h"
79 
80 
81 #if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
82 #undef TRACE_EVENT
83 #define TRACE_EVENT(name, proto, ...) \
84 static inline void trace_ ## name(proto) {}
85 #undef DECLARE_EVENT_CLASS
86 #define DECLARE_EVENT_CLASS(...)
87 #undef DEFINE_EVENT
88 #define DEFINE_EVENT(evt_class, name, proto, ...) \
89 static inline void trace_ ## name(proto) {}
90 #endif
91 
92 #define DEV_ENTRY	__string(dev, dev_name(dev))
93 #define DEV_ASSIGN	__assign_str(dev, dev_name(dev))
94 
95 #include "iwl-devtrace-io.h"
96 #include "iwl-devtrace-ucode.h"
97 #include "iwl-devtrace-msg.h"
98 #include "iwl-devtrace-data.h"
99 #include "iwl-devtrace-iwlwifi.h"
100 
101 #endif /* __IWLWIFI_DEVICE_TRACE */
102