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) 20 static 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 48 static 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, ...) \ 83 static 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, ...) \ 88 static 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