linux-toradex.git/drivers/scsi/ufs, branch v4.4.156

scsi: ufs: fix exception event handling

2018-08-06T14:24:35+00:00

[ Upstream commit 2e3611e9546c2ed4def152a51dfd34e8dddae7a5 ]

The device can set the exception event bit in one of the response UPIU,
for example to notify the need for urgent BKOPs operation.  In such a
case, the host driver calls ufshcd_exception_event_handler to handle
this notification.  When trying to check the exception event status (for
finding the cause for the exception event), the device may be busy with
additional SCSI commands handling and may not respond within the 100ms
timeout.

To prevent that, we need to block SCSI commands during handling of
exception events and allow retransmissions of the query requests, in
case of timeout.

Signed-off-by: Subhash Jadavani 
Signed-off-by: Maya Erez 
Signed-off-by: Can Guo 
Signed-off-by: Asutosh Das 
Reviewed-by: Subhash Jadavani 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

scsi: ufs: Enable quirk to ignore sending WRITE_SAME command

2018-05-30T05:48:57+00:00

[ Upstream commit 84af7e8b895088d89f246d6b0f82717fafdebf61 ]

WRITE_SAME command is not supported by UFS. Enable a quirk for the upper
level drivers to not send WRITE SAME command.

[mkp: botched patch, applied by hand]

Signed-off-by: Sujit Reddy Thumma 
Signed-off-by: Subhash Jadavani 
Signed-off-by: Asutosh Das 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

scsi: ufs: ufshcd: fix potential NULL pointer dereference in ufshcd_config_vreg

2018-02-03T16:04:29+00:00

[ Upstream commit 727535903bea924c4f73abb202c4b3e85fff0ca4 ]

_vreg_ is being dereferenced before it is null checked, hence there is a
potential null pointer dereference.

Fix this by moving the pointer dereference after _vreg_ has been null
checked.

This issue was detected with the help of Coccinelle.

Fixes: aa4976130934 ("ufs: Add regulator enable support")
Signed-off-by: Gustavo A. R. Silva 
Reviewed-by: Subhash Jadavani 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

scsi: ufs: add capability to keep auto bkops always enabled

2017-11-21T08:21:20+00:00

[ Upstream commit 4e768e7645ec4ffa92ee163643777b261ae97142 ]

UFS device requires to perform bkops (back ground operations) periodically
but host can control (via auto-bkops parameter of device) when device can
perform bkops based on its performance requirements. In general, host
would like to enable the device's auto-bkops only when it's not doing any
regular data transfer but sometimes device may not behave properly if host
keeps the auto-bkops disabled. This change adds the capability to let the
device auto-bkops always enabled except suspend.

Reviewed-by: Sahitya Tummala 
Signed-off-by: Subhash Jadavani 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

scsi: ufs-qcom: Fix module autoload

2017-11-21T08:21:19+00:00

[ Upstream commit ab3dabb3e8cf077850f20610f73a0def1fed10cb ]

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/scsi/ufs/ufs-qcom.ko | grep alias
$

After this patch:

$ modinfo drivers/scsi/ufs/ufs-qcom.ko | grep alias
alias:          of:N*T*Cqcom,ufshcC*
alias:          of:N*T*Cqcom,ufshc

Signed-off-by: Javier Martinez Canillas 
Reviewed-by: Subhash Jadavani 
Signed-off-by: Martin K. Petersen 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

Merge tag '4.4-scsi-mkp' into misc

2015-11-12T12:06:18+00:00

SCSI queue for 4.4.

Signed-off-by: Martin K. Petersen

scsi: use host wide tags by default

2015-11-10T01:11:57+00:00

This patch changes the !blk-mq path to the same defaults as the blk-mq
I/O path by always enabling block tagging, and always using host wide
tags.  We've had blk-mq available for a few releases so bugs with
this mode should have been ironed out, and this ensures we get better
coverage of over tagging setup over different configs.

Signed-off-by: Christoph Hellwig 
Acked-by: Jens Axboe 
Reviewed-by: Hannes Reinecke 
Signed-off-by: James Bottomley

scsi: ufs-qcom: add QUniPro hardware support and power optimizations

2015-11-09T23:03:55+00:00

New revisions of UFS host controller supports the new UniPro
hardware controller (referred as QUniPro). This patch adds
the support to enable this new UniPro controller hardware.

This change also adds power optimization for bus scaling feature,
as well as support for HS-G3 power mode.

Reviewed-by: Subhash Jadavani 
Reviewed-by: Gilad Broner 
Signed-off-by: Yaniv Gardi 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Martin K. Petersen

scsi: ufs-qcom: add debug prints for test bus

2015-11-09T23:01:58+00:00

Adds support for configuring and reading the test bus and debug
registers. This change also adds another vops in order to print the
debug registers.

Reviewed-by: Subhash Jadavani 
Reviewed-by: Gilad Broner 
Signed-off-by: Yaniv Gardi 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Martin K. Petersen

scsi: ufs: make the UFS variant a platform device

2015-11-09T23:00:02+00:00

This change turns the UFS variant (SCSI_UFS_QCOM) into a UFS
a platform device.
In order to do so a few additional changes are required:
1. The ufshcd-pltfrm is no longer serves as a platform device.
   Now it only serves as a group of platform APIs such as PM APIs
   (runtime suspend/resume, system suspend/resume etc), parsers of
   clocks, regulators and pm_levels from DT.
2. What used to be the old platform "probe" is now "only"
   a pltfrm_init() routine, that does exactly the same, but only
   being called by the new probe function of the UFS variant.

Reviewed-by: Rob Herring 
Reviewed-by: Gilad Broner 
Signed-off-by: Yaniv Gardi 
Tested-by: Alim Akhtar 
Reviewed-by: Hannes Reinecke 
Signed-off-by: Martin K. Petersen