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