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)
20static 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
48static 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
79
80#if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
81#undef TRACE_EVENT
82#define TRACE_EVENT(name, proto, ...) \
83static inline void trace_ ## name(proto) {}
84#undef DECLARE_EVENT_CLASS
85#define DECLARE_EVENT_CLASS(...)
86#undef DEFINE_EVENT
87#define DEFINE_EVENT(evt_class, name, proto, ...) \
88static inline void trace_ ## name(proto) {}
89#endif
90
91#define DEV_ENTRY	__string(dev, dev_name(dev))
92#define DEV_ASSIGN	__assign_str(dev, dev_name(dev))
93
94#include "iwl-devtrace-io.h"
95#include "iwl-devtrace-ucode.h"
96#include "iwl-devtrace-msg.h"
97#include "iwl-devtrace-data.h"
98#include "iwl-devtrace-iwlwifi.h"
99
100#endif /* __IWLWIFI_DEVICE_TRACE */
101