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: Change GPU Fast Hang detection to 50ms

Fast hang detection algorithm is improved to use additional
performance counters to monitor shader processor activity.
Shader processor's active alu cycles, icl0 misses
and fs cflow instructions are added to list of activities
monitored for fast hang detection.

Change-Id: Ie74b2ca2d8eb587dbdae40f8fafd901e71f50ddb
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>

Conflicts:

	drivers/gpu/msm/a3xx_reg.h
	drivers/gpu/msm/adreno_a3xx.c
msm: kgsl: Cleanup memdesc flags

We had a ugly mix of flags from usersapce mixed in with internal flags
and the flags were stored in priv and the internal flags were stored
in flags and general confusion all around.

So, external (user) flags moved to memdesc->flags, internal bits moved
to ->priv and now we are ready to handle the full onslaught of user
specified flags.

Change-Id: Ic0dedbad2236ae353b31e5dcaa6ff551713abaf1
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rajeev Kulkarni <krajeev@codeaurora.org>
msm: kgsl: Add GFP_NORETRY to the page_alloc flags and handle errors

The most important thing for the memory allocator is to not crash
or otherwise behave badly during low memory situations. Adding
GFP_NORETRY keeps the OOM killer from being invoked making the 32MB
padding on the allocation redundant.  Remove the padding, add the flags
and go down the proper error path when alloc_pages() fails.

Change-Id: Ic0dedbadaf86e248b372b22cd3a41a5dabedb82e
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
msm: kgsl: Remove support for IOCTL_KGSL_SHAREDMEM_FROM_VMALLOC

All userspace consumers should now be using IOCTL_KGSL_GPUMEM_ALLOC,
so we can safely remove this kludgy and deprecated code.  The structs
and #defines are left in the header to avoid breaking userspace and
to serve as a reminder of the way we were, but any use of
IOCTL_KGSL_SHAREMEM_FROM_VMALLOC will return -ENOTTY.

Change-Id: Ic0dedbad1460acfe28116ee2dbd75faa52b76857
Signed-off-by: Jordan Crouse <jcrouse@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: Modify kgsl_mmu_pagefault ftrace event format

The kgsl_mmu_pagefault event is the only ftrace event with
it's format field being multiline. All other ftrace events
in the kernel have the format field in a single line.
Make the kgsl_mmu_pagefault event format consistent with
all other ftrace events.

Change-Id: I99ab00f6319ae13a6f99a31bc11511d05835b50c
Signed-off-by: Pushkar Joshi <pushkarj@codeaurora.org>

Conflicts:

	drivers/gpu/msm/kgsl_trace.h
msm: kgsl: Use the correct units for ADRENO_IDLE_TIMEOUT

In a few spots the ADRENO_IDLE_TIMEOUT value (measured in milliseconds)
was used directly for jiffy calculations resulting in timeouts that were
1000/HZ times longer than they should have been.  Use msecs_to_jiffies
for these situations.

CRs-Fixed: 448226
Change-Id: Ic0dedbad33630706d909931bf616bd69399f7ff1
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
msm: kgsl: Don't change the sglen of the memdesc if allocation fails

If the page_alloc loop fails, we changed the length of the scatterlist
for the memdesc to the last good page so we could have an efficient
loop through kgsl_sharedmem_free.  Unfortunately, we were also using
the sglen to decide between using kmem or vmalloc memory for the sg
list in the first place. There is a chance that one could start out
with a large sg list from vmalloc, but if it failed early, then we
could truncate the size and attempt to kfree it.

Zero the stlist at init time and use a length == 0 as an indicator
that the list might be truncated.
CRs-Fixed: 443441

Change-Id: Ib48a08c69a7bbfc69b92f09e83fc80f9bdedffe0
Signed-off-by: Dhivya Subramanian <dthiru@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>
msm: kgsl: Locate index of recovery during initialization

When a hang happens locate the index in ringbuffer from where replay
of recovery needs to be re-tried during initialization of recevery.
If the hang detection is false then hang reported by postmortem and
snapshot may be different, but recovery will always start from the
index obtained during initialization. Also, this allows us to capture
data into the snapshot that is in line with the point from where
recovery occurred.

Change-Id: Ie3877f0c81dad2ede888db7cb7d3ff13e2761763
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
msm: kgsl: Recovery policy change

Recovery algorithm is changed to
step 1: retry the same commands that hung the GPU
step 2: if step 1 fails, nop just the IB that hung the GPU
	and retry
step 3: if step 2 fails, skip commands in current context
        till end of frame and retry
step 4: if step 3 fails mark context as bad and execute
        the remaining commands from good contexts.

Previously we used to return -EDEADLK when recovery succeeds,
this is the same error code if the context is not recoverable.
With new policy if recovery succeeds we return -EAGAIN so that
userspace treats recovered context differently from the ones
that are not recoverable. If recovery fails we mark the context
as bad and return -EDEADLK.

Change-Id: I9fa3c40801964186866b6002e62f19cf6aa41361
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
msm: kgsl: Renaming recovery to fault tolerance

Renaming recovery to fault tolerance and modifying
the functions and log messages accordingly.

Change-Id: I5f249806026ac514c4aff7da45c3a4e8cc2f8c34
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>

Conflicts:

	drivers/gpu/msm/adreno_ringbuffer.c
msm: kgsl: Store process id and name in context structure

Store process id and name in context structure, this
information is used to print the process name when
when we detect a error in the driver, example
GPU fault tolerance, commands from bad context
in issueibcmds.

Change-Id: I6acd63933754fdec80d8274d3e1380ff2c23770e
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
msm: kgsl: Detect long running IBs

When expired global timestamp is not progressing,
check if an IB is talking more than 2 seconds
with no update in GPU read pointer, IB1 base
IB1 size, IB2 base, IB2 size and detect it as a
long running IB. Invalidate the context of the IB
and do not attempt fault tolerance on this context.

Change-Id: I7e9780f5aed73a5c8807069aa506bec16a1576b4
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
msm: kgsl: Run GPU fault tolerance at max clock

GPU fault tolerance should take minimal time,
set the GPU clock to max freqency to acheive this.
When we set GPU clock to max freqency we vote for
high CPU clock and bus bandwidth.

Change-Id: I98a3f7c24f0939c08f9b12257817d17414e3f128
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
msm: kgsl: Reduce postmortem logs by default

Full postmortem logs take 600ms to 1sec and this affects
fault tolerance time. Reduce postmortem logs and print
only necessary information. Full postmortem logs can
be enabled using debugfs.

Change-Id: I9039746bbdcf67ceebc02f21e84ab873531035a5
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>

Conflicts:

	drivers/gpu/msm/adreno_postmortem.c
msm: kgsl: Allow fault tolerance userspace control

Allow userspace to control fault tolerance policy,
this allows fault tolerance policy to be controlled
using panel file.

Change-Id: I991edf6f082384bc69454058fe5df3b5f535aa4c
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
msm: kgsl: No fault tolerance if userspace sets a flag

If userspace requests no fault tolerance using context flag
KGSL_CONTEXT_NO_FAULT_TOLERANCE, do not attempt denial of
service detection and do not attempt fault tolerance when
a hang is detected.

Change-Id: I5de0e4ae6e8407365725c30fcb0e00a601460ebc
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
msm: kgsl: Limit pagefault logging to 1 per page

Log only one pagefault error per page. If we log all the
pagefault errors it causes lot of messages in kernel logs
and sometimes leads to watchdog timeouts.

Change-Id: If8ee4ee28f6289277eb98d4d8ba73dfda6fc1133
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>