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, 2023, 2025 Intel Corporation
7 *****************************************************************************/
8
9 #ifndef __IWLWIFI_DEVICE_TRACE
10 #define __IWLWIFI_DEVICE_TRACE
11 #include <linux/skbuff.h>
12 #include <linux/ieee80211.h>
13 #include <net/cfg80211.h>
14 #include <net/mac80211.h>
15 #include "iwl-trans.h"
iwl_trace_data(struct sk_buff * skb)16 static inline bool iwl_trace_data(struct sk_buff *skb)
17 {
18 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
19 struct ieee80211_hdr *hdr = (void *)skb->data;
20 __le16 fc = hdr->frame_control;
21 int offs = 24; /* start with normal header length */
22
23 if (!ieee80211_is_data(fc))
24 return false;
25
26 /* If upper layers wanted TX status it's an important frame */
27 if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
28 return false;
29
30 /* Try to determine if the frame is EAPOL. This might have false
31 * positives (if there's no RFC 1042 header and we compare to some
32 * payload instead) but since we're only doing tracing that's not
33 * a problem.
34 */
35
36 if (ieee80211_has_a4(fc))
37 offs += 6;
38 if (ieee80211_is_data_qos(fc))
39 offs += 2;
40 /* don't account for crypto - these are unencrypted */
41
42 /* also account for the RFC 1042 header, of course */
43 offs += 6;
44
45 return skb->len <= offs + 2 ||
46 *(__be16 *)(skb->data + offs) != cpu_to_be16(ETH_P_PAE);
47 }
48
iwl_rx_trace_len(const struct iwl_trans * trans,void * rxbuf,size_t len,size_t * out_hdr_offset)49 static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans,
50 void *rxbuf, size_t len,
51 size_t *out_hdr_offset)
52 {
53 struct iwl_cmd_header *cmd = (void *)((u8 *)rxbuf + sizeof(__le32));
54 struct ieee80211_hdr *hdr = NULL;
55 size_t hdr_offset;
56
57 if (cmd->cmd != trans->conf.rx_mpdu_cmd)
58 return len;
59
60 hdr_offset = sizeof(struct iwl_cmd_header) +
61 trans->conf.rx_mpdu_cmd_hdr_size;
62
63 if (out_hdr_offset)
64 *out_hdr_offset = hdr_offset;
65
66 hdr = (void *)((u8 *)cmd + hdr_offset);
67 if (!ieee80211_is_data(hdr->frame_control))
68 return len;
69 /* maybe try to identify EAPOL frames? */
70 return sizeof(__le32) + sizeof(*cmd) +
71 trans->conf.rx_mpdu_cmd_hdr_size +
72 ieee80211_hdrlen(hdr->frame_control);
73 }
74
75 #include <linux/tracepoint.h>
76 #include <linux/device.h>
77
78
79 #if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
80 #undef TRACE_EVENT
81 #define TRACE_EVENT(name, proto, ...) \
82 static inline void trace_ ## name(proto) {}
83 #undef DECLARE_EVENT_CLASS
84 #define DECLARE_EVENT_CLASS(...)
85 #undef DEFINE_EVENT
86 #define DEFINE_EVENT(evt_class, name, proto, ...) \
87 static inline void trace_ ## name(proto) {}
88 #endif
89
90 #define DEV_ENTRY __string(dev, dev_name(dev))
91 #define DEV_ASSIGN __assign_str(dev)
92
93 #include "iwl-devtrace-io.h"
94 #include "iwl-devtrace-ucode.h"
95 #include "iwl-devtrace-msg.h"
96 #include "iwl-devtrace-data.h"
97 #include "iwl-devtrace-iwlwifi.h"
98
99 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
100 DECLARE_TRACEPOINT(iwlwifi_dev_rx);
101 DECLARE_TRACEPOINT(iwlwifi_dev_rx_data);
102 #endif
103
104 void __trace_iwlwifi_dev_rx(struct iwl_trans *trans, void *pkt, size_t len);
105
maybe_trace_iwlwifi_dev_rx(struct iwl_trans * trans,void * pkt,size_t len)106 static inline void maybe_trace_iwlwifi_dev_rx(struct iwl_trans *trans,
107 void *pkt, size_t len)
108 {
109 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
110 if (tracepoint_enabled(iwlwifi_dev_rx) ||
111 tracepoint_enabled(iwlwifi_dev_rx_data))
112 __trace_iwlwifi_dev_rx(trans, pkt, len);
113 #endif
114 }
115 #endif /* __IWLWIFI_DEVICE_TRACE */
116