LXR linux/drivers/net/wireless/intel/iwlwifi/iwl-devtrace.h

   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