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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved.
   4  * Copyright(C) 2016 Intel Deutschland GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of version 2 of the GNU General Public License as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  18  *
  19  * The full GNU General Public License is included in this distribution in the
  20  * file called LICENSE.
  21  *
  22  * Contact Information:
  23  *  Intel Linux Wireless <linuxwifi@intel.com>
  24  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25  *
  26  *****************************************************************************/
  27
  28 #ifndef __IWLWIFI_DEVICE_TRACE
  29 #include <linux/skbuff.h>
  30 #include <linux/ieee80211.h>
  31 #include <net/cfg80211.h>
  32 #include "iwl-trans.h"
  33 #if !defined(__IWLWIFI_DEVICE_TRACE)
  34 static inline bool iwl_trace_data(struct sk_buff *skb)
  35 {
  36         struct ieee80211_hdr *hdr = (void *)skb->data;
  37         __le16 fc = hdr->frame_control;
  38         int offs = 24; /* start with normal header length */
  39
  40         if (!ieee80211_is_data(fc))
  41                 return false;
  42
  43         /* Try to determine if the frame is EAPOL. This might have false
  44          * positives (if there's no RFC 1042 header and we compare to some
  45          * payload instead) but since we're only doing tracing that's not
  46          * a problem.
  47          */
  48
  49         if (ieee80211_has_a4(fc))
  50                 offs += 6;
  51         if (ieee80211_is_data_qos(fc))
  52                 offs += 2;
  53         /* don't account for crypto - these are unencrypted */
  54
  55         /* also account for the RFC 1042 header, of course */
  56         offs += 6;
  57
  58         return skb->len <= offs + 2 ||
  59                 *(__be16 *)(skb->data + offs) != cpu_to_be16(ETH_P_PAE);
  60 }
  61
  62 static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans,
  63                                       void *rxbuf, size_t len)
  64 {
  65         struct iwl_cmd_header *cmd = (void *)((u8 *)rxbuf + sizeof(__le32));
  66         struct ieee80211_hdr *hdr;
  67
  68         if (cmd->cmd != trans->rx_mpdu_cmd)
  69                 return len;
  70
  71         hdr = (void *)((u8 *)cmd + sizeof(struct iwl_cmd_header) +
  72                         trans->rx_mpdu_cmd_hdr_size);
  73         if (!ieee80211_is_data(hdr->frame_control))
  74                 return len;
  75         /* maybe try to identify EAPOL frames? */
  76         return sizeof(__le32) + sizeof(*cmd) + trans->rx_mpdu_cmd_hdr_size +
  77                 ieee80211_hdrlen(hdr->frame_control);
  78 }
  79 #endif
  80
  81 #define __IWLWIFI_DEVICE_TRACE
  82
  83 #include <linux/tracepoint.h>
  84 #include <linux/device.h>
  85 #include "iwl-trans.h"
  86
  87
  88 #if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
  89 #undef TRACE_EVENT
  90 #define TRACE_EVENT(name, proto, ...) \
  91 static inline void trace_ ## name(proto) {}
  92 #undef DECLARE_EVENT_CLASS
  93 #define DECLARE_EVENT_CLASS(...)
  94 #undef DEFINE_EVENT
  95 #define DEFINE_EVENT(evt_class, name, proto, ...) \
  96 static inline void trace_ ## name(proto) {}
  97 #endif
  98
  99 #define DEV_ENTRY       __string(dev, dev_name(dev))
 100 #define DEV_ASSIGN      __assign_str(dev, dev_name(dev))
 101
 102 #include "iwl-devtrace-io.h"
 103 #include "iwl-devtrace-ucode.h"
 104 #include "iwl-devtrace-msg.h"
 105 #include "iwl-devtrace-data.h"
 106 #include "iwl-devtrace-iwlwifi.h"
 107
 108 #endif /* __IWLWIFI_DEVICE_TRACE */