scsi: hisi_sas: Add debugfs file structure for DQ
Create a file structure which was used to save the memory address and DQ pointer for DQ at debugfs. This structure is bound to the corresponding debugfs file, it can help callback function of debugfs file to get what it need. Link: https://lore.kernel.org/r/1571926105-74636-8-git-send-email-john.garry@huawei.comSigned-off-by: NLuo Jiaxing <luojiaxing@huawei.com> Signed-off-by: NJohn Garry <john.garry@huawei.com> Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
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