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)
iwl_trace_data(struct sk_buff * skb)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
iwl_rx_trace_len(const struct iwl_trans * trans,void * rxbuf,size_t len,size_t * out_hdr_offset)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
79
80 #if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
81 #undef TRACE_EVENT
82 #define TRACE_EVENT(name, proto, ...) \
83 static 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, ...) \
88 static 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