iwlwifi: add more debug info in error event dump

When sys assert happen, driver will dump the error table information
provided by uCode. There are more information available but is not being
display by the driver; adding program counter and last host command the
to log to help uCode debugging.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

2 files changed, 32 insertions, 5 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index 3526d5ee4755..8a002c6f3a61 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -1843,6 +1843,7 @@ void iwl_dump_nic_error_log(struct iwl_priv *priv)
         u32 data2, line;
         u32 desc, time, count, base, data1;
         u32 blink1, blink2, ilink1, ilink2;
+        u32 pc, hcmd;
 
         if (priv->ucode_type == UCODE_INIT)
                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
@@ -1865,6 +1866,7 @@ void iwl_dump_nic_error_log(struct iwl_priv *priv)
         }
 
         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
+        pc = iwl_read_targ_mem(priv, base + 2 * sizeof(u32));
         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
@@ -1873,6 +1875,7 @@ void iwl_dump_nic_error_log(struct iwl_priv *priv)
         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
+        hcmd = iwl_read_targ_mem(priv, base + 22 * sizeof(u32));
 
         trace_iwlwifi_dev_ucode_error(priv, desc, time, data1, data2, line,
                                       blink1, blink2, ilink1, ilink2);
@@ -1881,10 +1884,9 @@ void iwl_dump_nic_error_log(struct iwl_priv *priv)
                 "data1      data2      line\n");
         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
                 desc_lookup(desc), desc, time, data1, data2, line);
-        IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
-        IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
-                ilink1, ilink2);
-
+        IWL_ERR(priv, "pc      blink1  blink2  ilink1  ilink2  hcmd\n");
+        IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X 0x%05X 0x%05X\n",
+                pc, blink1, blink2, ilink1, ilink2, hcmd);
 }
 
 #define EVENT_START_OFFSET  (4 * sizeof(u32))
diff --git a/drivers/net/wireless/iwlwifi/iwl-commands.h b/drivers/net/wireless/iwlwifi/iwl-commands.h
index 6383d9f8c9b3..74d6887c7500 100644
--- a/drivers/net/wireless/iwlwifi/iwl-commands.h
+++ b/drivers/net/wireless/iwlwifi/iwl-commands.h
@@ -512,8 +512,9 @@ struct iwl_init_alive_resp {
  *
  *     Entries without timestamps contain only event_id and data.
  *
+ *
  * 2)  error_event_table_ptr indicates base of the error log.  This contains
- *     information about any uCode error that occurs.  For 4965, the format
+ *     information about any uCode error that occurs.  For agn, the format
  *     of the error log is:
  *
  *      __le32 valid;        (nonzero) valid, (0) log is empty
@@ -529,6 +530,30 @@ struct iwl_init_alive_resp {
  *      __le32 bcon_time;    beacon timer
  *      __le32 tsf_low;      network timestamp function timer
  *      __le32 tsf_hi;       network timestamp function timer
+ *      __le32 gp1;          GP1 timer register
+ *      __le32 gp2;          GP2 timer register
+ *      __le32 gp3;          GP3 timer register
+ *      __le32 ucode_ver;    uCode version
+ *      __le32 hw_ver;       HW Silicon version
+ *      __le32 brd_ver;      HW board version
+ *      __le32 log_pc;       log program counter
+ *      __le32 frame_ptr;    frame pointer
+ *      __le32 stack_ptr;    stack pointer
+ *      __le32 hcmd;         last host command
+ *      __le32 isr0;         isr status register LMPM_NIC_ISR0: rxtx_flag
+ *      __le32 isr1;         isr status register LMPM_NIC_ISR1: host_flag
+ *      __le32 isr2;         isr status register LMPM_NIC_ISR2: enc_flag
+ *      __le32 isr3;         isr status register LMPM_NIC_ISR3: time_flag
+ *      __le32 isr4;         isr status register LMPM_NIC_ISR4: wico interrupt
+ *      __le32 isr_pref;     isr status register LMPM_NIC_PREF_STAT
+ *      __le32 wait_event;   wait event() caller address
+ *      __le32 l2p_control;  L2pControlField
+ *      __le32 l2p_duration; L2pDurationField
+ *      __le32 l2p_mhvalid;  L2pMhValidBits
+ *      __le32 l2p_addr_match; L2pAddrMatchStat
+ *      __le32 lmpm_pmg_sel; indicate which clocks are turned on (LMPM_PMG_SEL)
+ *      __le32 u_timestamp;  indicate when the date and time of the compilation
+ *      __le32 reserved;
  *
  * The Linux driver can print both logs to the system log when a uCode error
  * occurs.