2982c3a17a
whenever there is a wmi timeout and recovery is triggered, the wmi history gives insight into reason for the recovery, hence save the last 5 commands/events to understand the reason for the hang recovery. Change-Id: Ie4e0431a8fa6971e6b25b20a6f267341d3f3f4fd CRs-Fixed: 2650340
137 行
4.1 KiB
C
137 行
4.1 KiB
C
/*
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* Copyright (c) 2020, The Linux Foundation. All rights reserved.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <qdf_hang_event_notifier.h>
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#include <qdf_notifier.h>
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#include <wmi_hang_event.h>
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#include <wmi_unified_priv.h>
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#include <qdf_trace.h>
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struct wmi_hang_data_fixed_param {
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uint32_t tlv_header; /* tlv tag and length */
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uint32_t event;
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uint32_t data;
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uint64_t time;
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} qdf_packed;
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#define WMI_EVT_HIST 0
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#define WMI_CMD_HIST 1
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static void wmi_log_history(struct notifier_block *block, void *data,
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uint8_t wmi_history)
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{
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qdf_notif_block *notif_block = qdf_container_of(block, qdf_notif_block,
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notif_block);
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struct qdf_notifer_data *wmi_hang_data = data;
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int nread, pos, total_len;
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unsigned int wmi_ring_size = 3;
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uint64_t secs, usecs;
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struct wmi_event_debug *wmi_evt;
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struct wmi_unified *wmi_handle;
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struct wmi_log_buf_t *wmi_log;
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struct wmi_hang_data_fixed_param *cmd;
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struct wmi_command_debug *wmi_cmd;
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uint8_t *wmi_buf_ptr;
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if (!wmi_hang_data)
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return;
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wmi_handle = notif_block->priv_data;
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if (!wmi_handle)
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return;
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if (wmi_hang_data->offset >= QDF_WLAN_MAX_HOST_OFFSET)
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return;
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if (wmi_history)
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wmi_log = &wmi_handle->log_info.wmi_event_log_buf_info;
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else
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wmi_log = &wmi_handle->log_info.wmi_command_log_buf_info;
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total_len = sizeof(struct wmi_hang_data_fixed_param);
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if (wmi_log->length <= wmi_ring_size)
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nread = wmi_log->length;
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else
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nread = wmi_ring_size;
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if (*wmi_log->p_buf_tail_idx == 0)
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/* tail can be 0 after wrap-around */
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pos = wmi_ring_size - 1;
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else
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pos = *wmi_log->p_buf_tail_idx - 1;
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while (nread--) {
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switch (wmi_history) {
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case WMI_EVT_HIST:
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wmi_buf_ptr = (wmi_hang_data->hang_data +
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wmi_hang_data->offset);
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cmd = ((struct wmi_hang_data_fixed_param *)wmi_buf_ptr);
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QDF_HANG_EVT_SET_HDR(&cmd->tlv_header,
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HANG_EVT_TAG_WMI_EVT_HIST,
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QDF_HANG_GET_STRUCT_TLVLEN(struct wmi_hang_data_fixed_param));
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wmi_evt = &(((struct wmi_event_debug *)wmi_log->buf)[pos]);
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cmd->event = wmi_evt->event;
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qdf_log_timestamp_to_secs(wmi_evt->time, &secs, &usecs);
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cmd->time = secs;
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cmd->data = wmi_evt->data[0];
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break;
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case WMI_CMD_HIST:
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wmi_buf_ptr = (wmi_hang_data->hang_data +
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wmi_hang_data->offset);
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cmd = ((struct wmi_hang_data_fixed_param *)wmi_buf_ptr);
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QDF_HANG_EVT_SET_HDR(&cmd->tlv_header,
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HANG_EVT_TAG_WMI_CMD_HIST,
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QDF_HANG_GET_STRUCT_TLVLEN(struct wmi_hang_data_fixed_param));
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wmi_cmd = &(((struct wmi_command_debug *)wmi_log->buf)[pos]);
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cmd->event = wmi_cmd->command;
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qdf_log_timestamp_to_secs(wmi_cmd->time, &secs, &usecs);
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cmd->time = secs;
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cmd->data = wmi_cmd->data[0];
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break;
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}
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if (pos == 0)
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pos = wmi_ring_size - 1;
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else
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pos--;
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wmi_hang_data->offset += total_len;
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}
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}
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static int wmi_recovery_notifier_call(struct notifier_block *block,
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unsigned long state,
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void *data)
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{
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wmi_log_history(block, data, WMI_EVT_HIST);
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wmi_log_history(block, data, WMI_CMD_HIST);
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return NOTIFY_OK;
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}
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static qdf_notif_block wmi_recovery_notifier = {
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.notif_block.notifier_call = wmi_recovery_notifier_call,
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};
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QDF_STATUS wmi_hang_event_notifier_register(struct wmi_unified *wmi_hdl)
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{
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wmi_recovery_notifier.priv_data = wmi_hdl;
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return qdf_hang_event_register_notifier(&wmi_recovery_notifier);
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}
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QDF_STATUS wmi_hang_event_notifier_unregister(void)
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{
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return qdf_hang_event_unregister_notifier(&wmi_recovery_notifier);
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}
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