scsi: hisi_sas: Add manual trigger for debugfs dump (7c5e1363) · Commits · 戴 / test

drivers/scsi/hisi_sas/hisi_sas_main.c

+34 −0

Original line number	Diff line number	Diff line
		@@ -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;