diff options
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn.c | 130 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-debug.h | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-debugfs.c | 56 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-dev.h | 29 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-devtrace.c | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-devtrace.h | 44 |
6 files changed, 262 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c index 954b8ae2c880..4d85c28e38e2 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn.c @@ -657,6 +657,131 @@ static void iwl_bg_statistics_periodic(unsigned long data) iwl_send_statistics_request(priv, CMD_ASYNC, false); } + +static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base, + u32 start_idx, u32 num_events, + u32 mode) +{ + u32 i; + u32 ptr; /* SRAM byte address of log data */ + u32 ev, time, data; /* event log data */ + unsigned long reg_flags; + + if (mode == 0) + ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32)); + else + ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32)); + + /* Make sure device is powered up for SRAM reads */ + spin_lock_irqsave(&priv->reg_lock, reg_flags); + if (iwl_grab_nic_access(priv)) { + spin_unlock_irqrestore(&priv->reg_lock, reg_flags); + return; + } + + /* Set starting address; reads will auto-increment */ + _iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, ptr); + rmb(); + + /* + * "time" is actually "data" for mode 0 (no timestamp). + * place event id # at far right for easier visual parsing. + */ + for (i = 0; i < num_events; i++) { + ev = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); + time = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); + if (mode == 0) { + trace_iwlwifi_dev_ucode_cont_event(priv, + 0, time, ev); + } else { + data = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT); + trace_iwlwifi_dev_ucode_cont_event(priv, + time, data, ev); + } + } + /* Allow device to power down */ + iwl_release_nic_access(priv); + spin_unlock_irqrestore(&priv->reg_lock, reg_flags); +} + +void iwl_continuous_event_trace(struct iwl_priv *priv) +{ + u32 capacity; /* event log capacity in # entries */ + u32 base; /* SRAM byte address of event log header */ + u32 mode; /* 0 - no timestamp, 1 - timestamp recorded */ + u32 num_wraps; /* # times uCode wrapped to top of log */ + u32 next_entry; /* index of next entry to be written by uCode */ + + if (priv->ucode_type == UCODE_INIT) + base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr); + else + base = le32_to_cpu(priv->card_alive.log_event_table_ptr); + if (priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) { + capacity = iwl_read_targ_mem(priv, base); + num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32))); + mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32))); + next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32))); + } else + return; + + if (num_wraps == priv->event_log.num_wraps) { + iwl_print_cont_event_trace(priv, + base, priv->event_log.next_entry, + next_entry - priv->event_log.next_entry, + mode); + priv->event_log.non_wraps_count++; + } else { + if ((num_wraps - priv->event_log.num_wraps) > 1) + priv->event_log.wraps_more_count++; + else + priv->event_log.wraps_once_count++; + trace_iwlwifi_dev_ucode_wrap_event(priv, + num_wraps - priv->event_log.num_wraps, + next_entry, priv->event_log.next_entry); + if (next_entry < priv->event_log.next_entry) { + iwl_print_cont_event_trace(priv, base, + priv->event_log.next_entry, + capacity - priv->event_log.next_entry, + mode); + + iwl_print_cont_event_trace(priv, base, 0, + next_entry, mode); + } else { + iwl_print_cont_event_trace(priv, base, + next_entry, capacity - next_entry, + mode); + + iwl_print_cont_event_trace(priv, base, 0, + next_entry, mode); + } + } + priv->event_log.num_wraps = num_wraps; + priv->event_log.next_entry = next_entry; +} + +/** + * iwl_bg_ucode_trace - Timer callback to log ucode event + * + * The timer is continually set to execute every + * UCODE_TRACE_PERIOD milliseconds after the last timer expired + * this function is to perform continuous uCode event logging operation + * if enabled + */ +static void iwl_bg_ucode_trace(unsigned long data) +{ + struct iwl_priv *priv = (struct iwl_priv *)data; + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + if (priv->event_log.ucode_trace) { + iwl_continuous_event_trace(priv); + /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */ + mod_timer(&priv->ucode_trace, + jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD)); + } +} + static void iwl_rx_beacon_notif(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) { @@ -3128,6 +3253,10 @@ static void iwl_setup_deferred_work(struct iwl_priv *priv) priv->statistics_periodic.data = (unsigned long)priv; priv->statistics_periodic.function = iwl_bg_statistics_periodic; + init_timer(&priv->ucode_trace); + priv->ucode_trace.data = (unsigned long)priv; + priv->ucode_trace.function = iwl_bg_ucode_trace; + if (!priv->cfg->use_isr_legacy) tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long)) iwl_irq_tasklet, (unsigned long)priv); @@ -3146,6 +3275,7 @@ static void iwl_cancel_deferred_work(struct iwl_priv *priv) cancel_delayed_work(&priv->alive_start); cancel_work_sync(&priv->beacon_update); del_timer_sync(&priv->statistics_periodic); + del_timer_sync(&priv->ucode_trace); } static void iwl_init_hw_rates(struct iwl_priv *priv, diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h index 86a67672598d..58e0462cafa3 100644 --- a/drivers/net/wireless/iwlwifi/iwl-debug.h +++ b/drivers/net/wireless/iwlwifi/iwl-debug.h @@ -110,6 +110,7 @@ struct iwl_debugfs { struct dentry *file_clear_ucode_statistics; struct dentry *file_clear_traffic_statistics; struct dentry *file_csr; + struct dentry *file_ucode_tracing; } dbgfs_debug_files; u32 sram_offset; u32 sram_len; diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c index 2be3549be01d..822de46e4f34 100644 --- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c +++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c @@ -1867,6 +1867,58 @@ static ssize_t iwl_dbgfs_csr_write(struct file *file, return count; } +static ssize_t iwl_dbgfs_ucode_tracing_read(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) { + + struct iwl_priv *priv = (struct iwl_priv *)file->private_data; + int pos = 0; + char buf[128]; + const size_t bufsz = sizeof(buf); + ssize_t ret; + + pos += scnprintf(buf + pos, bufsz - pos, "ucode trace timer is %s\n", + priv->event_log.ucode_trace ? "On" : "Off"); + pos += scnprintf(buf + pos, bufsz - pos, "non_wraps_count:\t\t %u\n", + priv->event_log.non_wraps_count); + pos += scnprintf(buf + pos, bufsz - pos, "wraps_once_count:\t\t %u\n", + priv->event_log.wraps_once_count); + pos += scnprintf(buf + pos, bufsz - pos, "wraps_more_count:\t\t %u\n", + priv->event_log.wraps_more_count); + + ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); + return ret; +} + +static ssize_t iwl_dbgfs_ucode_tracing_write(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct iwl_priv *priv = file->private_data; + char buf[8]; + int buf_size; + int trace; + + memset(buf, 0, sizeof(buf)); + buf_size = min(count, sizeof(buf) - 1); + if (copy_from_user(buf, user_buf, buf_size)) + return -EFAULT; + if (sscanf(buf, "%d", &trace) != 1) + return -EFAULT; + + if (trace) { + priv->event_log.ucode_trace = true; + /* schedule the ucode timer to occur in UCODE_TRACE_PERIOD */ + mod_timer(&priv->ucode_trace, + jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD)); + } else { + priv->event_log.ucode_trace = false; + del_timer_sync(&priv->ucode_trace); + } + + return count; +} + DEBUGFS_READ_FILE_OPS(rx_statistics); DEBUGFS_READ_FILE_OPS(tx_statistics); DEBUGFS_READ_WRITE_FILE_OPS(traffic_log); @@ -1882,6 +1934,7 @@ DEBUGFS_READ_FILE_OPS(power_save_status); DEBUGFS_WRITE_FILE_OPS(clear_ucode_statistics); DEBUGFS_WRITE_FILE_OPS(clear_traffic_statistics); DEBUGFS_WRITE_FILE_OPS(csr); +DEBUGFS_READ_WRITE_FILE_OPS(ucode_tracing); /* * Create the debugfs files and directories @@ -1939,6 +1992,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name) DEBUGFS_ADD_FILE(ucode_general_stats, debug, S_IRUSR); DEBUGFS_ADD_FILE(sensitivity, debug, S_IRUSR); DEBUGFS_ADD_FILE(chain_noise, debug, S_IRUSR); + DEBUGFS_ADD_FILE(ucode_tracing, debug, S_IWUSR | S_IRUSR); } DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal); DEBUGFS_ADD_BOOL(disable_chain_noise, rf, @@ -2002,6 +2056,8 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv) file_sensitivity); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files. file_chain_noise); + DEBUGFS_REMOVE(priv->dbgfs->dbgfs_debug_files. + file_ucode_tracing); } DEBUGFS_REMOVE(priv->dbgfs->dir_debug); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity); diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h index 2673e9a4db92..b3a29c7cdbc0 100644 --- a/drivers/net/wireless/iwlwifi/iwl-dev.h +++ b/drivers/net/wireless/iwlwifi/iwl-dev.h @@ -984,6 +984,32 @@ struct iwl_switch_rxon { __le16 channel; }; +/* + * schedule the timer to wake up every UCODE_TRACE_PERIOD milliseconds + * to perform continuous uCode event logging operation if enabled + */ +#define UCODE_TRACE_PERIOD (100) + +/* + * iwl_event_log: current uCode event log position + * + * @ucode_trace: enable/disable ucode continuous trace timer + * @num_wraps: how many times the event buffer wraps + * @next_entry: the entry just before the next one that uCode would fill + * @non_wraps_count: counter for no wrap detected when dump ucode events + * @wraps_once_count: counter for wrap once detected when dump ucode events + * @wraps_more_count: counter for wrap more than once detected + * when dump ucode events + */ +struct iwl_event_log { + bool ucode_trace; + u32 num_wraps; + u32 next_entry; + int non_wraps_count; + int wraps_once_count; + int wraps_more_count; +}; + struct iwl_priv { /* ieee device used by generic ieee processing code */ @@ -1261,6 +1287,7 @@ struct iwl_priv { u32 disable_tx_power_cal; struct work_struct run_time_calib_work; struct timer_list statistics_periodic; + struct timer_list ucode_trace; bool hw_ready; /*For 3945*/ #define IWL_DEFAULT_TX_POWER 0x0F @@ -1268,6 +1295,8 @@ struct iwl_priv { struct iwl3945_notif_statistics statistics_39; u32 sta_supp_rates; + + struct iwl_event_log event_log; }; /*iwl_priv */ static inline void iwl_txq_ctx_activate(struct iwl_priv *priv, int txq_id) diff --git a/drivers/net/wireless/iwlwifi/iwl-devtrace.c b/drivers/net/wireless/iwlwifi/iwl-devtrace.c index e7d88d1da15d..bf46308b17fa 100644 --- a/drivers/net/wireless/iwlwifi/iwl-devtrace.c +++ b/drivers/net/wireless/iwlwifi/iwl-devtrace.c @@ -11,4 +11,6 @@ EXPORT_TRACEPOINT_SYMBOL(iwlwifi_dev_iowrite32); EXPORT_TRACEPOINT_SYMBOL(iwlwifi_dev_rx); EXPORT_TRACEPOINT_SYMBOL(iwlwifi_dev_ucode_event); EXPORT_TRACEPOINT_SYMBOL(iwlwifi_dev_ucode_error); +EXPORT_TRACEPOINT_SYMBOL(iwlwifi_dev_ucode_cont_event); +EXPORT_TRACEPOINT_SYMBOL(iwlwifi_dev_ucode_wrap_event); #endif diff --git a/drivers/net/wireless/iwlwifi/iwl-devtrace.h b/drivers/net/wireless/iwlwifi/iwl-devtrace.h index 21361968ab7e..0819f990be6c 100644 --- a/drivers/net/wireless/iwlwifi/iwl-devtrace.h +++ b/drivers/net/wireless/iwlwifi/iwl-devtrace.h @@ -65,6 +65,50 @@ TRACE_EVENT(iwlwifi_dev_iowrite32, ); #undef TRACE_SYSTEM +#define TRACE_SYSTEM iwlwifi_ucode + +TRACE_EVENT(iwlwifi_dev_ucode_cont_event, + TP_PROTO(struct iwl_priv *priv, u32 time, u32 data, u32 ev), + TP_ARGS(priv, time, data, ev), + TP_STRUCT__entry( + PRIV_ENTRY + + __field(u32, time) + __field(u32, data) + __field(u32, ev) + ), + TP_fast_assign( + PRIV_ASSIGN; + __entry->time = time; + __entry->data = data; + __entry->ev = ev; + ), + TP_printk("[%p] EVT_LOGT:%010u:0x%08x:%04u", + __entry->priv, __entry->time, __entry->data, __entry->ev) +); + +TRACE_EVENT(iwlwifi_dev_ucode_wrap_event, + TP_PROTO(struct iwl_priv *priv, u32 wraps, u32 n_entry, u32 p_entry), + TP_ARGS(priv, wraps, n_entry, p_entry), + TP_STRUCT__entry( + PRIV_ENTRY + + __field(u32, wraps) + __field(u32, n_entry) + __field(u32, p_entry) + ), + TP_fast_assign( + PRIV_ASSIGN; + __entry->wraps = wraps; + __entry->n_entry = n_entry; + __entry->p_entry = p_entry; + ), + TP_printk("[%p] wraps=#%02d n=0x%X p=0x%X", + __entry->priv, __entry->wraps, __entry->n_entry, + __entry->p_entry) +); + +#undef TRACE_SYSTEM #define TRACE_SYSTEM iwlwifi TRACE_EVENT(iwlwifi_dev_hcmd, |