1 /****************************************************************************** 2 * 3 * Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved. 4 * Copyright(C) 2016 Intel Deutschland GmbH 5 * Copyright(c) 2018 Intel Corporation 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of version 2 of the GNU General Public License as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 * The full GNU General Public License is included in this distribution in the 17 * file called LICENSE. 18 * 19 * Contact Information: 20 * Intel Linux Wireless <linuxwifi@intel.com> 21 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 22 * 23 *****************************************************************************/ 24 25 #ifndef __IWLWIFI_DEVICE_TRACE 26 #include <linux/skbuff.h> 27 #include <linux/ieee80211.h> 28 #include <net/cfg80211.h> 29 #include "iwl-trans.h" 30 #if !defined(__IWLWIFI_DEVICE_TRACE) 31 static inline bool iwl_trace_data(struct sk_buff *skb) 32 { 33 struct ieee80211_hdr *hdr = (void *)skb->data; 34 __le16 fc = hdr->frame_control; 35 int offs = 24; /* start with normal header length */ 36 37 if (!ieee80211_is_data(fc)) 38 return false; 39 40 /* Try to determine if the frame is EAPOL. This might have false 41 * positives (if there's no RFC 1042 header and we compare to some 42 * payload instead) but since we're only doing tracing that's not 43 * a problem. 44 */ 45 46 if (ieee80211_has_a4(fc)) 47 offs += 6; 48 if (ieee80211_is_data_qos(fc)) 49 offs += 2; 50 /* don't account for crypto - these are unencrypted */ 51 52 /* also account for the RFC 1042 header, of course */ 53 offs += 6; 54 55 return skb->len <= offs + 2 || 56 *(__be16 *)(skb->data + offs) != cpu_to_be16(ETH_P_PAE); 57 } 58 59 static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans, 60 void *rxbuf, size_t len, 61 size_t *out_hdr_offset) 62 { 63 struct iwl_cmd_header *cmd = (void *)((u8 *)rxbuf + sizeof(__le32)); 64 struct ieee80211_hdr *hdr = NULL; 65 size_t hdr_offset; 66 67 if (cmd->cmd != trans->rx_mpdu_cmd) 68 return len; 69 70 hdr_offset = sizeof(struct iwl_cmd_header) + 71 trans->rx_mpdu_cmd_hdr_size; 72 73 if (out_hdr_offset) 74 *out_hdr_offset = hdr_offset; 75 76 hdr = (void *)((u8 *)cmd + hdr_offset); 77 if (!ieee80211_is_data(hdr->frame_control)) 78 return len; 79 /* maybe try to identify EAPOL frames? */ 80 return sizeof(__le32) + sizeof(*cmd) + trans->rx_mpdu_cmd_hdr_size + 81 ieee80211_hdrlen(hdr->frame_control); 82 } 83 #endif 84 85 #define __IWLWIFI_DEVICE_TRACE 86 87 #include <linux/tracepoint.h> 88 #include <linux/device.h> 89 #include "iwl-trans.h" 90 91 92 #if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__) 93 #undef TRACE_EVENT 94 #define TRACE_EVENT(name, proto, ...) \ 95 static inline void trace_ ## name(proto) {} 96 #undef DECLARE_EVENT_CLASS 97 #define DECLARE_EVENT_CLASS(...) 98 #undef DEFINE_EVENT 99 #define DEFINE_EVENT(evt_class, name, proto, ...) \ 100 static inline void trace_ ## name(proto) {} 101 #endif 102 103 #define DEV_ENTRY __string(dev, dev_name(dev)) 104 #define DEV_ASSIGN __assign_str(dev, dev_name(dev)) 105 106 #include "iwl-devtrace-io.h" 107 #include "iwl-devtrace-ucode.h" 108 #include "iwl-devtrace-msg.h" 109 #include "iwl-devtrace-data.h" 110 #include "iwl-devtrace-iwlwifi.h" 111 112 #endif /* __IWLWIFI_DEVICE_TRACE */ 113