sync: Add synchronization framework

Change-Id: I209f9db2824e0313f467f11ab09e5f54f0a4a6b5
Signed-off-by: Erik Gilling <konkers@android.com>
sw_sync: add cpu based sync driver

Change-Id: I1042851f5e30f9fdc2f35bdad84123bcf108560f
Signed-off-by: Erik Gilling <konkers@android.com>

Conflicts:
	drivers/base/Kconfig
sync: add timestamps to sync_pts

Change-Id: I2ad855072b86873880769a09a3176e85aa1199d7
Signed-off-by: Erik Gilling <konkers@android.com>
sync: add debugfs support

Change-Id: I8a7ea63e454fbeee1ecf17e6c3caff7c43b24734
Signed-off-by: Erik Gilling <konkers@android.com>
sw_sync: add debug support

Change-Id: Ibcc5fa8cb36e283cdf0e3308064876722e2675fc
Signed-off-by: Erik Gilling <konkers@android.com>
sync: add ioctl to get fence data

Change-Id: I71410aef7e03a52562f7cb15b993ac8441b1fa12
Signed-off-by: Erik Gilling <konkers@android.com>
sw_sync: add fill_driver_data support

Change-Id: Ib3812d282db56362d82f5ccc9a12b7d2100ab93a
Signed-off-by: Erik Gilling <konkers@android.com>
sync: add poll support

Change-Id: I294e481bba92658e6dd26f157ddbf0e9ff4ce8a5
Signed-off-by: Erik Gilling <konkers@android.com>
sync: driver commits

- Revert "base: sync: signal a sync pt when not adding to the
active_list"
- sync: Fix error paths
- sync: add tracepoint support
- sync: refactor sync debug printing
- sync: use proper barriers when waiting indefinitely
- sync: update new fence status with sync_fence_signal_pt
- sync: dump sync state of fence errors
- sync: protect unlocked access to fence status
- base: sync: signal a sync pt when not adding to the active_list
- sync: improve timeout dumps
- sync: use correct signed type when handling SYNC_IOC_WAIT
- sync: dump sync state to console on timeout
- sync: clean up compiler warnings
- sync: fix erase-o in sync_fence_wait
- sync: change wait timeout to mirror poll semantics
- sync: add reference counting to timelines
- sync: add internal refcounting to fences
- sync: optimize fence merges
- sync: reorder sync_fence_release
- sync: export sync API symbols
- sync: allow async waits to be canceled

Change-Id: Id65ecdd395782d487773bdf7baa3ed681a72b729
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>
module.h: split out the EXPORT_SYMBOL into export.h

A lot of files pull in module.h when all they are really
looking for is the basic EXPORT_SYMBOL functionality. The
recent data from Ingo[1] shows that this is one of several
instances that has a significant impact on compile times,
and it should be targeted for factoring out (as done here).

Note that several commonly used header files in include/*
directly include <linux/module.h> themselves (some 34 of them!)
The most commonly used ones of these will have to be made
independent of module.h before the full benefit of this change
can be realized.

We also transition THIS_MODULE from module.h to export.h,
since there are lots of files with subsystem structs that
in turn will have a struct module *owner and only be doing:

	.owner = THIS_MODULE;

and absolutely nothing else modular. So, we also want to have
the THIS_MODULE definition present in the lightweight header.

[1] https://lkml.org/lkml/2011/5/23/76

Change-Id: I70a80b3ac3638f0eda1ac596ee3fba832880df07
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Trilok Soni <tsoni@codeaurora.org>
Adding support for trace events for sync point driver

Change-Id: Icdbe176f1c651e6a0805ef63b9b7f143ab06a350
Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>
msm: kgsl: Resolve a potential race in the interrupt handler

In the GPU interrupt handler we attempt to clear the ts_cmp_enable
for the active context so that future interrupts are skipped until
someone needs one again. If for some reason the interrupt handler
is delayed then there is a possiblity that the "current" context in
the GPU isn't the one that fired the interrupt. In that case we
could be accidently clearing a ts_cmp_enable for a context that
needs it. Instead of clearing in the interrupt handler clear it
from the GPU so we can be sure we got the right context.

As a bonus pushing this logic to the GPU side lets us get rid of
some extra register reads/writes in the interrupt handlers.

Change-Id: I3cb3d1a3c626d0594e55bff4535990c1402764fa
Signed-off-by: Harsh Vardhan Dwivedi <hdwivedi@codeaurora.org>
msm: kgsl: Check the current interrupt status before power operations

Sometimes the core will go idle before the interrupt can be handled on
the GPU. If that happens then we could go to a lower power state before
cleaning up the pending interrupt and various entities that might be
waiting for it. Consider the current interrupt status when checking
for idle.

Change-Id: Idd43e56e0162a522e0929df83531aff94beadc19
Signed-off-by: Harsh Vardhan Dwivedi <hdwivedi@codeaurora.org>
msm: kgsl: Prevent missing servicing of events waiting on timestamps

Prevent instances where we miss servicing an event which was waiting
on a timestamp. We do this by looping in the events list, until
we finish servicing all the members of the list, and if we come across
an event which has not been serviced yet, we write a dummy interrupt to
the ringbuffer so that we don't miss when that timestamp's work is done.

Change-Id: Ib7b3554efa0d9a8bdc20d1722d912977f72f3ed5
Signed-off-by: Harsh Vardhan Dwivedi <hdwivedi@codeaurora.org>
ARM: decompressor: avoid speculative prefetch from non-RAM areas

We setup identity MMU mappings across the entire 4GB of space, which
are permissionless because the domain is set to manager.

This unfortunately allows ARMv6 and later CPUs to speculatively
prefetch from the entire address space, which can cause undesirable
side effects if those regions contain devices.

As we setup the mappings with read/write permission, we can switch
the domain to client mode, and then use the XN bit for ARMv6 and
above to control speculative prefetch to non-RAM areas.

CRs-Fixed: 415757
Change-Id: I24bacf244b1e987e1b966eee64a2578cbdb12080
Reported-by: R Sricharan <r.sricharan@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
(cherry picked from commit 3463f07a22f288c6230aa8c230f623d9183c5a10)

Signed-off-by: Shruthi Krishna <skrish@codeaurora.org>