iwlwifi: mvm: Dump FW's virtual image in the case of a NIC error

When paging is enabled the driver stores part of the FW's
image in the DRAM.

Dump FW's virtual image in the case of a NIC error.

Signed-off-by: Golan Ben-Ami <golan.ben.ami@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h b/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
index af5b320..9dbe19c 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
+++ b/drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
@@ -86,6 +86,8 @@
  *     Structured as &struct iwl_fw_error_dump_trigger_desc.
  * @IWL_FW_ERROR_DUMP_RB: the content of an RB structured as
  *     &struct iwl_fw_error_dump_rb
+ * @IWL_FW_ERROR_PAGING: UMAC's image memory segments which were
+ *     paged to the DRAM.
  */
 enum iwl_fw_error_dump_type {
        /* 0 is deprecated */
@@ -100,6 +102,7 @@ enum iwl_fw_error_dump_type {
        IWL_FW_ERROR_DUMP_MEM = 9,
        IWL_FW_ERROR_DUMP_ERROR_INFO = 10,
        IWL_FW_ERROR_DUMP_RB = 11,
+       IWL_FW_ERROR_DUMP_PAGING = 12,
 
        IWL_FW_ERROR_DUMP_MAX,
 };
@@ -239,6 +242,19 @@ struct iwl_fw_error_dump_rb {
        u8 data[];
 };
 
+/**
+ * struct iwl_fw_error_dump_paging - content of the UMAC's image page
+ *     block on DRAM
+ * @index: the index of the page block
+ * @reserved:
+ * @data: the content of the page block
+ */
+struct iwl_fw_error_dump_paging {
+       __le32 index;
+       __le32 reserved;
+       u8 data[];
+};
+
 /**
  * iwl_fw_error_next_data - advance fw error dump data pointer
  * @data: previous data block

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 8443e14..aaffb54 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -1192,6 +1192,13 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
        if (sram2_len)
                file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
 
+       /* Make room for fw's virtual image pages, if it exists */
+       if (mvm->fw->img[mvm->cur_ucode].paging_mem_size)
+               file_len += mvm->num_of_paging_blk *
+                       (sizeof(*dump_data) +
+                        sizeof(struct iwl_fw_error_dump_paging) +
+                        PAGING_BLOCK_SIZE);
+
        /* If we only want a monitor dump, reset the file length */
        if (monitor_dump_only) {
                file_len = sizeof(*dump_file) + sizeof(*dump_data) +
@@ -1302,6 +1309,26 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
                                         dump_mem->data, IWL8260_ICCM_LEN);
        }
 
+       /* Dump fw's virtual image */
+       if (mvm->fw->img[mvm->cur_ucode].paging_mem_size) {
+               u32 i;
+
+               for (i = 1; i < mvm->num_of_paging_blk + 1; i++) {
+                       struct iwl_fw_error_dump_paging *paging;
+                       struct page *pages =
+                               mvm->fw_paging_db[i].fw_paging_block;
+
+                       dump_data = iwl_fw_error_next_data(dump_data);
+                       dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_PAGING);
+                       dump_data->len = cpu_to_le32(sizeof(*paging) +
+                                                    PAGING_BLOCK_SIZE);
+                       paging = (void *)dump_data->data;
+                       paging->index = cpu_to_le32(i);
+                       memcpy(paging->data, page_address(pages),
+                              PAGING_BLOCK_SIZE);
+               }
+       }
+
 dump_trans_data:
        fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans,
                                                       mvm->fw_dump_trig);