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scsi: ufs: Add quirk to handle broken UIC command

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Samsung ExynosAuto v9 SoC has two types of host controller interface to
support the virtualization of UFS Device.  One is the physical host (PH)
that is the same as conventional UFSHCI, and the other is the virtual host
(VH) that supports data transfer function only.

In this configuration the virtual host does not support UIC commands. Add a
quirk to return 0 when the UIC command send function is called.

Link: https://lore.kernel.org/r/20211018124216.153072-2-chanho61.park@samsung.com
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: James E.J. Bottomley <jejb@linux.ibm.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: jongmin jeong <jjmin.jeong@samsung.com>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
jongmin jeong 2021-10-18 21:42:02 +09:00 committed by Martin K. Petersen
parent 3a71f0f7a5
commit a22bcfdbf1
2 changed files with 9 additions and 0 deletions
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3
drivers/scsi/ufs/ufshcd.c
View File

@ -2330,6 +2330,9 @@ int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
int ret;
unsigned long flags;
if (hba->quirks & UFSHCD_QUIRK_BROKEN_UIC_CMD)
return 0;
ufshcd_hold(hba, false);
mutex_lock(&hba->uic_cmd_mutex);
ufshcd_add_delay_before_dme_cmd(hba);

6
drivers/scsi/ufs/ufshcd.h
View File

@ -589,6 +589,12 @@ enum ufshcd_quirks {
* This quirk allows only sg entries aligned with page size.
*/
UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE = 1 << 14,
/*
* This quirk needs to be enabled if the host controller does not
* support UIC command
*/
UFSHCD_QUIRK_BROKEN_UIC_CMD = 1 << 15,
};
enum ufshcd_caps {