qseecom: Fix issues on key management scheme

The mechanism to update how a user is tied to an existing key is
added. And the app_access_lock mutex is removed in key management
APIs, as there is no need to lock app access while processing a
key related request.

Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Add checks for user space buffer pointers

Validate pointers send from user space and pointers
embedded within the mesasge sent from user space.

Change-Id: I1be54924ef3d301908af6e8d4e6506f2aa7f6428
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Add support for bus scaling

Add support for scaling bus to various level:
LOW, MEDIUM, HIGH.  Expose IOCTL to user space
clients to enable selecting a specific bus bandwidth
setting.

Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Removal of flags and options to protect listener memory

With the new ION design all memory allocated from secure heaps is
secured already at allocation time. This commit effectively rolls
back a change introduced to secure this memory at runtime.

Change-Id: I94bf0a7f6d477b04da7ad6786111f8c970516842
Acked-by: Christian Bolis <cbolis@qti.qualcomm.com>
Signed-off-by: Hariprasad Dhalinarasimha <hnamgund@codeaurora.org>
qseecom: change key management apis

Remove 2 seconds sleep if create_key or update_key fails, and
this delay is now handled by TZ. change errno when maximum
attempt to input password is reached.

Change-Id: I14350219f43094d280ebc1e3717418285063448d
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Add basic suspend resume functionality

If ce clock is not disabled in suspend state, memory may be corrupted and
device can not wake up. Thus,if clock is enabled, we disable it in qseecom
suspend function and re-enable it again in resume function.

Change-Id: I70349ad3070c340add1f3fbe392a4bec2b8af9bf
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Change pr_warning message to pr_debug

Change warning message to debug message to reduce the excessive logging.
These changes are applicable only if any process is trying to interrupt
the blocking listener services.

Change-Id: Ie1c9af0daf16ef2c39e198f30b0151e2246d79e3
Signed-off-by: AnilKumar Chimata <anilc@codeaurora.org>
Signed-off-by: Hariprasad Dhalinarasimha <hnamgund@codeaurora.org>
qseecom: Validate shared buffer length & virtual address

Return -EINVAL if virtual addr of shared buffer is NULL or
shared buffer length is 0

Change-Id: I44369bf12ddafa63b71ee54496eb86b2615d4322
Signed-off-by: Hariprasad Dhalinarasimha <hnamgund@codeaurora.org>
qseecom: update clock ref count when bus scaling timer is running

When there are multiple enable/dislable clock operations, ce clock
ref count is not updated correctly when the timer to disable clock
is running. Specifically, the ref count is not decreased when the
old operation is finished and then we reset clock for the new enable
clock. Thus, the ce clock is not disabled after all operation are
completed due to incorrect clk ref count. We make a change to
decrease clock reference count before reset timer, when the timer
is running, then clock is disabled when all ce clock operations
finish and the timer expires.

Change-Id: If71fd526acd9a74bf21731841fae0b98e76a89b5
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: change qseecom bus scaling timer operation

To ensure ce clock is not disabled before tz operation is completed,
we delete the old timer when tz side operation begins, and then add
a new timer after tz operation is completed.

Change-Id: I4bc8fe3d9305cc1ed5db8e6490832fcc790ef3d7
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Fix clock get failures

Pass the device node with of_node to clk_get(), to get the clock struct.
This patch fixes the issue by passing proper device handle with of_node
to clock APIs to get the appropriate clock node.

Change-Id: I01a2caf7d86a4399b1bb4a455ef8ecbbad5ad9a2
Signed-off-by: AnilKumar Chimata <anilc@codeaurora.org>
qseecom: Validate the pointer returned by ion_import_dma_buf

Do a "IS_ERR_OR_NULL" check for the return value of
ion_import_dma_buf.

Change-Id: Iaac8b59b1f076d002430e0e6aba055bd88c83ed7
Signed-off-by: Hariprasad Dhalinarasimha <hnamgund@codeaurora.org>
Revert "qseecom: change qseecom bus scaling timer operation"

This reverts  commit 06418b79767c16f0637c23e516ccd0b7ece51dd2.

Change-Id: I59a93084584e7a2608d8af097bdbb50391c5a052
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: change qseecom bus scaling timer operation

To ensure ce clock is not disabled before tz operation is completed,
we delete the old timer when tz side operation begins, and then add
a new timer after tz operation is completed.

Change-Id: I4bc8fe3d9305cc1ed5db8e6490832fcc791ef3d7
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Ensure CE clk is managed properly

clk access ref count is not updated correctly when issuing a
request that requires enabling clk. this results in leaving the
clk on during regular operation resulting in failure of the
device to go into low power mode.

Change-Id: I80232433ff09277fe83d78142dcec75e7493d96e
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Add support for PFE feature

Add key management support for crypto HW used for
PFE (per file encryption) features.

Change-Id: Ic0664973d9a4099f76d7b3040f0f81df8465cf71
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Check for FDE/PFE feature

Add checks for PFE/FDE feature before executing anything
related to the feature.

Change-Id: I575d4d4eea29fd9ae59e47805793f2416a97f5b9
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: add support to clear key for per file encryption

Make a KMS change to support just clear pipe key without deleting it
from ssd storage. Key id definitions for FDE and PDE are also updated.

Change-Id: I7c4804902a7a734087374c81ff0fd95655d84429
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: change bus scale up mode in resume function

The maximum bus bandwidth mode supported by bus bandwidth setting
function is 3 (i.e., HIGH), then to scale up bus bandwidth based on
cumulative mode may prevent us from updating the bus bandwidth
correctly when cumulative mode is greater than 3 (which is the case
if there are concurrent applications running). Thus, we made a
change to scale up bus bandwidth mode to at most 3 in qseecom
resume function.

Change-Id: I3ec6eedace2fa2ea7de519df307c3ff9b193c910
Signed-off-by: Zhen Kong <zkong@codeaurora.org>
qseecom: Validate pointer offset in qseecom_send_modfd_cmd

Validate cmd_req_buf pointer offset in qseecom_send_modfy_cmd, and
make sure cmd buffer address to be within shared bufffer.

Change-Id: I431511a92ab2cccbc2daebc0cf76cc3872689a97
Signed-off-by: Zhen Kong <zkong@codeaurora.org>