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scsi: hisi_sas: Add timestamp for a debugfs dump 

It's useful to know when the dump occurred, so add a timestamp file for
this.

Link: https://lore.kernel.org/r/1571926105-74636-6-git-send-email-john.garry@huawei.com
Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Luo Jiaxing 2019-10-24 22:08:12 +08:00 committed by Martin K. Petersen
parent 550c0d89d5
commit d28ed83b76
2 changed files with 10 additions and 0 deletions
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2
drivers/scsi/hisi_sas/hisi_sas.h
View File

@ -21,6 +21,7 @@
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/timer.h>
#include <scsi/sas_ata.h>
#include <scsi/libsas.h>
@ -410,6 +411,7 @@ struct hisi_hba {
struct hisi_sas_iost *debugfs_iost;
struct hisi_sas_itct *debugfs_itct;
u64 *debugfs_iost_cache;
u64 debugfs_timestamp;
u64 *debugfs_itct_cache;
struct dentry *debugfs_dir;

8
drivers/scsi/hisi_sas/hisi_sas_main.c
View File

@ -3194,6 +3194,7 @@ static const struct file_operations hisi_sas_debugfs_itct_cache_fops = {
static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
{
u64 *debugfs_timestamp;
struct dentry *dump_dentry;
struct dentry *dentry;
char name[256];
@ -3201,10 +3202,14 @@ static void hisi_sas_debugfs_create_files(struct hisi_hba *hisi_hba)
int c;
int d;
debugfs_timestamp = &hisi_hba->debugfs_timestamp;
/* Create dump dir inside device dir */
dump_dentry = debugfs_create_dir("dump", hisi_hba->debugfs_dir);
hisi_hba->debugfs_dump_dentry = dump_dentry;
debugfs_create_u64("timestamp", 0400, dump_dentry,
debugfs_timestamp);
debugfs_create_file("global", 0400, dump_dentry, hisi_hba,
&hisi_sas_debugfs_global_fops);
@ -3684,7 +3689,10 @@ void hisi_sas_debugfs_work_handler(struct work_struct *work)
{
struct hisi_hba *hisi_hba =
container_of(work, struct hisi_hba, debugfs_work);
u64 timestamp = local_clock();
do_div(timestamp, NSEC_PER_MSEC);
hisi_hba->debugfs_timestamp = timestamp;
if (hisi_hba->debugfs_snapshot)
return;
hisi_hba->debugfs_snapshot = true;