mwifiex: device dump support via devcoredump framework

Currently device dump generated in the driver is retrieved
using ethtool set/get dump commands. We will get rid of
ethtool approach and use devcoredump framework.

Device dump can be trigger by
cat /debugfs/mwifiex/mlanX/device_dump
and when the dump operation is completed, data can be read by
cat /sys/class/devcoredump/devcdX/data

We have prepared following script to split device dump data
into multiple files.

 [root]# cat mwifiex_split_dump_data.sh
 #!/bin/bash
 # usage: ./mwifiex_split_dump_data.sh dump_data

 fw_dump_data=$1

 mem_type="driverinfo ITCM DTCM SQRAM APU CIU ICU MAC"

 for name in ${mem_type[@]}
 do
     sed -n "/Start dump $name/,/End dump/p" $fw_dump_data  > tmp.$name.log
     if [ ! -s tmp.$name.log ]
     then
         rm -rf tmp.$name.log
     else
         #Remove the describle info "Start dump" and "End dump"
         sed '1d' tmp.$name.log | sed '$d' > /data/$name.log
         if [ -s /data/$name.log ]
         then
             echo "generate /data/$name.log"
         else
             sed '1d' tmp.$name.log | sed '$d' > /var/$name.log
             echo "generate /var/$name.log"
         fi
         rm -rf tmp.$name.log
     fi
 done

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 90 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
index b7fbc2cdf0bd..3ba4e0e04223 100644
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -982,6 +982,96 @@ void mwifiex_drv_info_dump(struct mwifiex_adapter *adapter)
 }
 EXPORT_SYMBOL_GPL(mwifiex_drv_info_dump);
 
+void mwifiex_upload_device_dump(struct mwifiex_adapter *adapter)
+{
+	u8 idx, *dump_data, *fw_dump_ptr;
+	u32 dump_len;
+
+	dump_len = (strlen("========Start dump driverinfo========\n") +
+		       adapter->drv_info_size +
+		       strlen("\n========End dump========\n"));
+
+	for (idx = 0; idx < adapter->num_mem_types; idx++) {
+		struct memory_type_mapping *entry =
+				&adapter->mem_type_mapping_tbl[idx];
+
+		if (entry->mem_ptr) {
+			dump_len += (strlen("========Start dump ") +
+					strlen(entry->mem_name) +
+					strlen("========\n") +
+					(entry->mem_size + 1) +
+					strlen("\n========End dump========\n"));
+		}
+	}
+
+	dump_data = vzalloc(dump_len + 1);
+	if (!dump_data)
+		goto done;
+
+	fw_dump_ptr = dump_data;
+
+	/* Dump all the memory data into single file, a userspace script will
+	 * be used to split all the memory data to multiple files
+	 */
+	mwifiex_dbg(adapter, MSG,
+		    "== mwifiex dump information to /sys/class/devcoredump start");
+
+	strcpy(fw_dump_ptr, "========Start dump driverinfo========\n");
+	fw_dump_ptr += strlen("========Start dump driverinfo========\n");
+	memcpy(fw_dump_ptr, adapter->drv_info_dump, adapter->drv_info_size);
+	fw_dump_ptr += adapter->drv_info_size;
+	strcpy(fw_dump_ptr, "\n========End dump========\n");
+	fw_dump_ptr += strlen("\n========End dump========\n");
+
+	for (idx = 0; idx < adapter->num_mem_types; idx++) {
+		struct memory_type_mapping *entry =
+					&adapter->mem_type_mapping_tbl[idx];
+
+		if (entry->mem_ptr) {
+			strcpy(fw_dump_ptr, "========Start dump ");
+			fw_dump_ptr += strlen("========Start dump ");
+
+			strcpy(fw_dump_ptr, entry->mem_name);
+			fw_dump_ptr += strlen(entry->mem_name);
+
+			strcpy(fw_dump_ptr, "========\n");
+			fw_dump_ptr += strlen("========\n");
+
+			memcpy(fw_dump_ptr, entry->mem_ptr, entry->mem_size);
+			fw_dump_ptr += entry->mem_size;
+
+			strcpy(fw_dump_ptr, "\n========End dump========\n");
+			fw_dump_ptr += strlen("\n========End dump========\n");
+		}
+	}
+
+	/* device dump data will be free in device coredump release function
+	 * after 5 min
+	 */
+	dev_coredumpv(adapter->dev, dump_data, dump_len, GFP_KERNEL);
+	mwifiex_dbg(adapter, MSG,
+		    "== mwifiex dump information to /sys/class/devcoredump end");
+
+done:
+	for (idx = 0; idx < adapter->num_mem_types; idx++) {
+		struct memory_type_mapping *entry =
+			&adapter->mem_type_mapping_tbl[idx];
+
+		if (entry->mem_ptr) {
+			vfree(entry->mem_ptr);
+			entry->mem_ptr = NULL;
+		}
+		entry->mem_size = 0;
+	}
+
+	if (adapter->drv_info_dump) {
+		vfree(adapter->drv_info_dump);
+		adapter->drv_info_dump = NULL;
+		adapter->drv_info_size = 0;
+	}
+}
+EXPORT_SYMBOL_GPL(mwifiex_upload_device_dump);
+
 /*
  * CFG802.11 network device handler for statistics retrieval.
  */