msm: kgsl: Do not save context if it is being destroyed

No need to save a context if it is being destroyed since
it will no longer be used at all. This is better for
performance and also avoids the use of legacy kgsl
context save code for contexts that use preambles

Change-Id: I19a64e82188b4132f353bb61c21e4ed2281092fc
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
msm: kgsl: Do not allocate space in ringbuffer for hung context

If a hang is detected when allocating space in ringbuffer and
if the context for which the space is being allocated is hung
then do not allocate space at all.

Change-Id: Ia5ade2341fe5016119d8c140413860420c5c3a3d
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
msm: kgsl: unprepare clocks when we move from NAP to SLEEP

The existing code leaves clks prepared when we transition from
NAP to SLEEP. We fail to reach Vdd_min as voltage scaling has
moved to prepare/unprepare.

Change-Id: I509f4c6bd217ead985890147819236dd2c5d03ce
Signed-off-by: Suman Tatiraju <sumant@codeaurora.org>
msm: kgsl: Remove non-critical error messages

Stop the kernel from spamming error messages on non-kernel errors.
Remove the error messages that are coming from the user space passing
invalid parameters to the kgsl ioctls.

Change-Id: Iea9646da1d3a92ebaffd6c4449130c069d61021d
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>
msm: kgsl: Remove extra interrupts when setting MMU state

The interrupts added to the ringbuffer on PTFLUSH and TLBUPDATE
were causing a major increase in the number of interrupts from the GPU.
This was leading to increase in power and loss of performance. Add a check
to turn off IOMMU clocks when going to SLEEP.

Change-Id: I41617dd3b7b3f7d9622523f2a1407b912dbd989e
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
msm: kgsl: Remove an uneeded register write for A3XX GPUs

A3XX doesn't have the MH block and so the register at 0x40 points
somewhere else. Luckily the write was harmless but remove it anyway.

Change-Id: Ic0dedbadd1e043cd38bbaec8fcf0c490dcdedc8c
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Harsh Bhanvadia <harsh.slade@gmail.com>
msm: kgsl: Fix guilty context logic for GPU hangs

Always mark GPU contexts that have cause a GPU hang as guilty.
If the GPU context recovered successfully, still mark it as guilty.
This will inform applications that something might have
gone wrong and to take actions to ensure everything is correct.

Also, swap out any active context following a hang.  This will
ensure that any new submissions will force the context to be restored
before it is used.

CRs-fixed: 427603
CRs-fixed: 405434
Change-Id: I6b7cf2b2a680a4691f45535a147ca678a4d961f3
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>
Signed-off-by: Harsh Bhanvadia <harsh.slade@gmail.com>
msm: kgsl: Avoid NULL pointer in adreno setstate functions

Make sure the specified context_id returns a valid context
in adreno_gpummu_setstate and adreno_iommu_setstate and
silently return if it doesn't.

CRs-Fixed: 439367
Change-Id: Ic0dedbad1a91b53f19782b50380bd36842614351
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
msm: kgsl: Lower bounds check the number of power levels

A misconfigured board file could cause an out-of-bounds
array access through this value.

Change-Id: I64bbad0c096a2efe65376991537d810141370d72
CRs-Fixed: 439230
Signed-off-by: Lucille Sylvester <lsylvest@codeaurora.org>
msm: kgsl: Add minimum amount of wait in adreno_waittimestamp

Add minimum amount of wait period in adreno_waittimestamp
to avoid instances of malformed wait period (such as msecs=0)
arguments from userspace and in turn avoid false hang detections.

CRs-fixed: 437738
Change-Id: I5cd40dc7589747e7fffeb6d5cc2001b73d6d845e
Signed-off-by: Harsh Vardhan Dwivedi <hdwivedi@codeaurora.org>
msm: kgsl: Fix hang detection to be 50ms or more

In current design waittimestamp can trigger hang detection
in less than 50ms. Check if hang detection was called less than
50ms ago, if true do no attempt hang detection.

Change-Id: Iaeb2501316c4194957fbe211b6023eeb869bd0d5
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>