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mwifiex: device dump support for usb interface
Firmware dump on usb interface is different with current sdio/pcie chipset, which is based on register operation. When firmware hang on usb interface, context dump will be upload to host using 0x73 firmware debug event. This patch store dump data from debug event and send to userspace using device coredump API. Signed-off-by: Xinming Hu <huxm@marvell.com> Signed-off-by: Cathy Luo <cluo@marvell.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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d0e2b44ef3
commit
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4 changed files with 82 additions and 0 deletions
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@ -56,6 +56,15 @@ struct mwifiex_fw_data {
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u8 data[1];
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} __packed;
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struct mwifiex_fw_dump_header {
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__le16 seq_num;
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__le16 reserved;
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__le16 type;
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__le16 len;
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} __packed;
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#define FW_DUMP_INFO_ENDED 0x0002
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#define MWIFIEX_FW_DNLD_CMD_1 0x1
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#define MWIFIEX_FW_DNLD_CMD_5 0x5
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#define MWIFIEX_FW_DNLD_CMD_6 0x6
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@ -570,6 +579,7 @@ enum mwifiex_channel_flags {
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#define EVENT_BG_SCAN_STOPPED 0x00000065
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#define EVENT_REMAIN_ON_CHAN_EXPIRED 0x0000005f
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#define EVENT_MULTI_CHAN_INFO 0x0000006a
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#define EVENT_FW_DUMP_INFO 0x00000073
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#define EVENT_TX_STATUS_REPORT 0x00000074
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#define EVENT_BT_COEX_WLAN_PARA_CHANGE 0X00000076
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@ -64,6 +64,13 @@ static void wakeup_timer_fn(struct timer_list *t)
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adapter->if_ops.card_reset(adapter);
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}
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static void fw_dump_timer_fn(struct timer_list *t)
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{
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struct mwifiex_adapter *adapter = from_timer(adapter, t, devdump_timer);
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mwifiex_upload_device_dump(adapter);
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}
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/*
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* This function initializes the private structure and sets default
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* values to the members.
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@ -315,6 +322,7 @@ static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
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adapter->active_scan_triggered = false;
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timer_setup(&adapter->wakeup_timer, wakeup_timer_fn, 0);
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adapter->devdump_len = 0;
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timer_setup(&adapter->devdump_timer, fw_dump_timer_fn, 0);
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}
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/*
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@ -397,6 +405,7 @@ static void
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mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter)
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{
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del_timer(&adapter->wakeup_timer);
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del_timer_sync(&adapter->devdump_timer);
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mwifiex_cancel_all_pending_cmd(adapter);
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wake_up_interruptible(&adapter->cmd_wait_q.wait);
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wake_up_interruptible(&adapter->hs_activate_wait_q);
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@ -1037,6 +1037,7 @@ struct mwifiex_adapter {
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/* Device dump data/length */
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void *devdump_data;
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int devdump_len;
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struct timer_list devdump_timer;
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};
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void mwifiex_process_tx_queue(struct mwifiex_adapter *adapter);
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@ -1682,6 +1683,7 @@ void mwifiex_process_multi_chan_event(struct mwifiex_private *priv,
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void mwifiex_multi_chan_resync(struct mwifiex_adapter *adapter);
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int mwifiex_set_mac_address(struct mwifiex_private *priv,
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struct net_device *dev);
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void mwifiex_devdump_tmo_func(unsigned long function_context);
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#ifdef CONFIG_DEBUG_FS
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void mwifiex_debugfs_init(void);
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@ -584,6 +584,62 @@ void mwifiex_bt_coex_wlan_param_update_event(struct mwifiex_private *priv,
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adapter->coex_rx_win_size);
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}
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static void
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mwifiex_fw_dump_info_event(struct mwifiex_private *priv,
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struct sk_buff *event_skb)
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{
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struct mwifiex_adapter *adapter = priv->adapter;
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struct mwifiex_fw_dump_header *fw_dump_hdr =
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(void *)adapter->event_body;
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if (adapter->iface_type != MWIFIEX_USB) {
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mwifiex_dbg(adapter, MSG,
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"event is not on usb interface, ignore it\n");
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return;
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}
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if (!adapter->devdump_data) {
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/* When receive the first event, allocate device dump
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* buffer, dump driver info.
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*/
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adapter->devdump_data = vzalloc(MWIFIEX_FW_DUMP_SIZE);
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if (!adapter->devdump_data) {
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mwifiex_dbg(adapter, ERROR,
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"vzalloc devdump data failure!\n");
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return;
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}
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mwifiex_drv_info_dump(adapter);
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/* If no proceeded event arrive in 10s, upload device
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* dump data, this will be useful if the end of
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* transmission event get lost, in this cornel case,
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* user would still get partial of the dump.
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*/
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mod_timer(&adapter->devdump_timer,
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jiffies + msecs_to_jiffies(MWIFIEX_TIMER_10S));
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}
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/* Overflow check */
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if (adapter->devdump_len + event_skb->len >= MWIFIEX_FW_DUMP_SIZE)
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goto upload_dump;
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memmove(adapter->devdump_data + adapter->devdump_len,
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adapter->event_skb->data, event_skb->len);
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adapter->devdump_len += event_skb->len;
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if (le16_to_cpu(fw_dump_hdr->type == FW_DUMP_INFO_ENDED)) {
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mwifiex_dbg(adapter, MSG,
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"receive end of transmission flag event!\n");
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goto upload_dump;
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}
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return;
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upload_dump:
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del_timer_sync(&adapter->devdump_timer);
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mwifiex_upload_device_dump(adapter);
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}
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/*
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* This function handles events generated by firmware.
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*
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@ -636,6 +692,7 @@ void mwifiex_bt_coex_wlan_param_update_event(struct mwifiex_private *priv,
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* - EVENT_DELBA
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* - EVENT_BA_STREAM_TIEMOUT
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* - EVENT_AMSDU_AGGR_CTRL
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* - EVENT_FW_DUMP_INFO
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*/
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int mwifiex_process_sta_event(struct mwifiex_private *priv)
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{
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@ -1007,6 +1064,10 @@ int mwifiex_process_sta_event(struct mwifiex_private *priv)
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adapter->event_skb->len -
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sizeof(eventcause));
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break;
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case EVENT_FW_DUMP_INFO:
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mwifiex_dbg(adapter, EVENT, "event: firmware debug info\n");
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mwifiex_fw_dump_info_event(priv, adapter->event_skb);
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break;
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/* Debugging event; not used, but let's not print an ERROR for it. */
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case EVENT_UNKNOWN_DEBUG:
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mwifiex_dbg(adapter, EVENT, "event: debug\n");
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