1 /* 2 * Copyright (c) 2020, The Linux Foundation. All rights reserved. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 #include <qdf_hang_event_notifier.h> 17 #include <qdf_notifier.h> 18 #include <wmi_hang_event.h> 19 #include <wmi_unified_priv.h> 20 #include <qdf_trace.h> 21 22 struct wmi_hang_data_fixed_param { 23 uint32_t tlv_header; /* tlv tag and length */ 24 uint32_t event; 25 uint32_t data; 26 uint64_t time; 27 } qdf_packed; 28 29 #define WMI_EVT_HIST 0 30 #define WMI_CMD_HIST 1 31 32 static void wmi_log_history(struct notifier_block *block, void *data, 33 uint8_t wmi_history) 34 { 35 qdf_notif_block *notif_block = qdf_container_of(block, qdf_notif_block, 36 notif_block); 37 struct qdf_notifer_data *wmi_hang_data = data; 38 int nread, pos, total_len; 39 unsigned int wmi_ring_size = 3; 40 uint64_t secs, usecs; 41 struct wmi_event_debug *wmi_evt; 42 struct wmi_unified *wmi_handle; 43 struct wmi_log_buf_t *wmi_log; 44 struct wmi_hang_data_fixed_param *cmd; 45 struct wmi_command_debug *wmi_cmd; 46 uint8_t *wmi_buf_ptr; 47 48 if (!wmi_hang_data) 49 return; 50 51 wmi_handle = notif_block->priv_data; 52 if (!wmi_handle) 53 return; 54 55 if (wmi_hang_data->offset >= QDF_WLAN_MAX_HOST_OFFSET) 56 return; 57 58 if (wmi_history) 59 wmi_log = &wmi_handle->log_info.wmi_event_log_buf_info; 60 else 61 wmi_log = &wmi_handle->log_info.wmi_command_log_buf_info; 62 63 total_len = sizeof(struct wmi_hang_data_fixed_param); 64 65 if (wmi_log->length <= wmi_ring_size) 66 nread = wmi_log->length; 67 else 68 nread = wmi_ring_size; 69 70 if (*wmi_log->p_buf_tail_idx == 0) 71 /* tail can be 0 after wrap-around */ 72 pos = wmi_ring_size - 1; 73 else 74 pos = *wmi_log->p_buf_tail_idx - 1; 75 76 while (nread--) { 77 switch (wmi_history) { 78 case WMI_EVT_HIST: 79 wmi_buf_ptr = (wmi_hang_data->hang_data + 80 wmi_hang_data->offset); 81 cmd = ((struct wmi_hang_data_fixed_param *)wmi_buf_ptr); 82 QDF_HANG_EVT_SET_HDR(&cmd->tlv_header, 83 HANG_EVT_TAG_WMI_EVT_HIST, 84 QDF_HANG_GET_STRUCT_TLVLEN(struct wmi_hang_data_fixed_param)); 85 wmi_evt = &(((struct wmi_event_debug *)wmi_log->buf)[pos]); 86 cmd->event = wmi_evt->event; 87 qdf_log_timestamp_to_secs(wmi_evt->time, &secs, &usecs); 88 cmd->time = secs; 89 cmd->data = wmi_evt->data[0]; 90 break; 91 case WMI_CMD_HIST: 92 wmi_buf_ptr = (wmi_hang_data->hang_data + 93 wmi_hang_data->offset); 94 cmd = ((struct wmi_hang_data_fixed_param *)wmi_buf_ptr); 95 QDF_HANG_EVT_SET_HDR(&cmd->tlv_header, 96 HANG_EVT_TAG_WMI_CMD_HIST, 97 QDF_HANG_GET_STRUCT_TLVLEN(struct wmi_hang_data_fixed_param)); 98 wmi_cmd = &(((struct wmi_command_debug *)wmi_log->buf)[pos]); 99 cmd->event = wmi_cmd->command; 100 qdf_log_timestamp_to_secs(wmi_cmd->time, &secs, &usecs); 101 cmd->time = secs; 102 cmd->data = wmi_cmd->data[0]; 103 break; 104 } 105 if (pos == 0) 106 pos = wmi_ring_size - 1; 107 else 108 pos--; 109 wmi_hang_data->offset += total_len; 110 } 111 } 112 113 static int wmi_recovery_notifier_call(struct notifier_block *block, 114 unsigned long state, 115 void *data) 116 { 117 wmi_log_history(block, data, WMI_EVT_HIST); 118 wmi_log_history(block, data, WMI_CMD_HIST); 119 120 return NOTIFY_OK; 121 } 122 123 static qdf_notif_block wmi_recovery_notifier = { 124 .notif_block.notifier_call = wmi_recovery_notifier_call, 125 }; 126 127 QDF_STATUS wmi_hang_event_notifier_register(struct wmi_unified *wmi_hdl) 128 { 129 wmi_recovery_notifier.priv_data = wmi_hdl; 130 return qdf_hang_event_register_notifier(&wmi_recovery_notifier); 131 } 132 133 QDF_STATUS wmi_hang_event_notifier_unregister(void) 134 { 135 return qdf_hang_event_unregister_notifier(&wmi_recovery_notifier); 136 } 137