iwlwifi: mvm: sram hex dump on NIC error

Add sram dump on NIC error for debug improvement.

Signed-off-by: Matti Gottlieb <matti.gottlieb@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index d40d7db..3aaecbc 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -524,6 +524,7 @@ int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
                                        enum ieee80211_band band);
 u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx);
 void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm);
+void iwl_mvm_dump_sram(struct iwl_mvm *mvm);
 u8 first_antenna(u8 mask);
 u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx);
 

diff --git a/drivers/net/wireless/iwlwifi/mvm/ops.c b/drivers/net/wireless/iwlwifi/mvm/ops.c
index af79a14..0a4eb27 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/ops.c
+++ b/drivers/net/wireless/iwlwifi/mvm/ops.c
@@ -678,6 +678,8 @@ static void iwl_mvm_nic_error(struct iwl_op_mode *op_mode)
        struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
 
        iwl_mvm_dump_nic_error_log(mvm);
+       if (!iwlwifi_mod_params.restart_fw)
+               iwl_mvm_dump_sram(mvm);
 
        iwl_mvm_nic_restart(mvm);
 }

diff --git a/drivers/net/wireless/iwlwifi/mvm/utils.c b/drivers/net/wireless/iwlwifi/mvm/utils.c
index 1e13328..a9c3574 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/iwlwifi/mvm/utils.c
@@ -453,6 +453,29 @@ void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)
        IWL_ERR(mvm, "0x%08X | flow_handler\n", table.flow_handler);
 }
 
+void iwl_mvm_dump_sram(struct iwl_mvm *mvm)
+{
+       const struct fw_img *img;
+       int ofs, len = 0;
+       u8 *buf;
+
+       if (!mvm->ucode_loaded)
+               return;
+
+       img = &mvm->fw->img[mvm->cur_ucode];
+       ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
+       len = img->sec[IWL_UCODE_SECTION_DATA].len;
+
+       buf = kzalloc(len, GFP_KERNEL);
+       if (!buf)
+               return;
+
+       iwl_trans_read_mem_bytes(mvm->trans, ofs, buf, len);
+       iwl_print_hex_error(mvm->trans, buf, len);
+
+       kfree(buf);
+}
+
 /**
  * iwl_mvm_send_lq_cmd() - Send link quality command
  * @init: This command is sent as part of station initialization right