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BACKPORT: 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>
Bug: 206186055
(cherry picked from commit a22bcfdbf1)
[Chanho: Resolved cherry-pick conflict in drivers/scsi/ufs/ufshcd.h due
to below ANDROID keyslot patch.
74e7fc0492 ("ANDROID: scsi: ufs: split up UFSHCD_QUIRK_NO_KEYSLOTS")
No code change from original patch]
Change-Id: Iff59b08ebf1494542c548678772cfc0230c2f91e
This commit is contained in:
jongmin jeong
2021-10-18 21:42:02 +09:00
committed by Bart Van Assche
parent 1694ef383e
commit 7f1f1f7902
2 changed files with 9 additions and 0 deletions
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3
drivers/scsi/ufs/ufshcd.c
View File

@@ -2329,6 +2329,9 @@ 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 {
*/
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,
/*
* This quirk needs to be enabled if the host controller supports inline
* encryption, but it needs to initialize the crypto capabilities in a