diff options
| author |   Luo Jiaxing <luojiaxing@huawei.com> | 2019-02-06 18:52:52 +0800 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2019-02-08 18:08:22 -0500 |
| commit | 7c5e136363919d8dfa27d4bcd4b3ecedfa234997 (patch) | |
| tree | a81945993179ef6c636ccf5da1e5c598177506f7 /drivers/scsi | |
| parent | scsi: hisi_sas: Add support for DIX feature for v3 hw (diff) | |
| download | linux-dev-7c5e136363919d8dfa27d4bcd4b3ecedfa234997.tar.xz linux-dev-7c5e136363919d8dfa27d4bcd4b3ecedfa234997.zip | |
scsi: hisi_sas: Add manual trigger for debugfs dump
Add an interface to manually trigger a debugfs dump.
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>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/hisi_sas/hisi_sas_main.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 1a3d31d4258c..35619bdad1d5 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -2977,6 +2977,36 @@ static void hisi_sas_debugfs_snapshot_regs(struct hisi_hba *hisi_hba) hisi_hba->hw->snapshot_restore(hisi_hba); } +static ssize_t hisi_sas_debugfs_trigger_dump_write(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct hisi_hba *hisi_hba = file->f_inode->i_private; + char buf[8]; + + /* A bit racy, but don't care too much since it's only debugfs */ + if (hisi_hba->debugfs_snapshot) + return -EFAULT; + + if (count > 8) + return -EFAULT; + + if (copy_from_user(buf, user_buf, count)) + return -EFAULT; + + if (buf[0] != '1') + return -EFAULT; + + queue_work(hisi_hba->wq, &hisi_hba->debugfs_work); + + return count; +} + +static const struct file_operations hisi_sas_debugfs_trigger_dump_fops = { + .write = &hisi_sas_debugfs_trigger_dump_write, + .owner = THIS_MODULE, +}; + void hisi_sas_debugfs_work_handler(struct work_struct *work) { struct hisi_hba *hisi_hba = @@ -2999,6 +3029,10 @@ void hisi_sas_debugfs_init(struct hisi_hba *hisi_hba) hisi_hba->debugfs_dir = debugfs_create_dir(dev_name(dev), hisi_sas_debugfs_dir); + debugfs_create_file("trigger_dump", 0600, + hisi_hba->debugfs_dir, + hisi_hba, + &hisi_sas_debugfs_trigger_dump_fops); /* Alloc buffer for global */ sz = hisi_hba->hw->debugfs_reg_global->count * 4; |