linux-stable.git/drivers/gpu/host1x, branch v4.13.2

gpu: host1x: Free the IOMMU domain when there is no device to attach

2017-07-27T14:57:34+00:00

When there is no device to attach to the IOMMU domain, as may be the
case when the device-tree does not contain the proper iommu node, it is
best to keep going without IOMMU support rather than failing.
This allows the driver to probe and function instead of taking down
all of the tegra drm driver, leading to missing display support.

Signed-off-by: Paul Kocialkowski 
Fixes: 404bfb78daf3 ("gpu: host1x: Add IOMMU support")
Reviewed-by: Mikko Perttunen 
Tested-by: Marcel Ziswiler 
Signed-off-by: Thierry Reding 
Link: https://patchwork.freedesktop.org/patch/msgid/20170710193305.5987-1-contact@paulk.fr

Merge remote-tracking branch 'airlied/drm-next' into drm-misc-next-fixes

2017-06-20T15:50:41+00:00

Backmerging airlied/drm-next

Merge tag 'drm/tegra/for-4.13-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

2017-06-20T01:07:03+00:00

drm/tegra: Changes for v4.13-rc1

This starts off with the addition of more documentation for the host1x
and DRM drivers and finishes with a slew of fixes and enhancements for
the staging IOCTLs as a result of the awesome work done by Dmitry and
Erik on the grate reverse-engineering effort.

* tag 'drm/tegra/for-4.13-rc1' of git://anongit.freedesktop.org/tegra/linux:
  gpu: host1x: At first try a non-blocking allocation for the gather copy
  gpu: host1x: Refactor channel allocation code
  gpu: host1x: Remove unused host1x_cdma_stop() definition
  gpu: host1x: Remove unused 'struct host1x_cmdbuf'
  gpu: host1x: Check waits in the firewall
  gpu: host1x: Correct swapped arguments in the is_addr_reg() definition
  gpu: host1x: Forbid unrelated SETCLASS opcode in the firewall
  gpu: host1x: Forbid RESTART opcode in the firewall
  gpu: host1x: Forbid relocation address shifting in the firewall
  gpu: host1x: Do not leak BO's phys address to userspace
  gpu: host1x: Correct host1x_job_pin() error handling
  gpu: host1x: Initialize firewall class to the job's one
  drm/tegra: dc: Disable plane if it is invisible
  drm/tegra: dc: Apply clipping to the plane
  drm/tegra: dc: Avoid reset asserts on Tegra20
  drm/tegra: Check syncpoint ID in the 'submit' IOCTL
  drm/tegra: Correct copying of waitchecks and disable them in the 'submit' IOCTL
  drm/tegra: Check for malformed offsets and sizes in the 'submit' IOCTL
  drm/tegra: Add driver documentation
  gpu: host1x: Flesh out kerneldoc

gpu: host1x: At first try a non-blocking allocation for the gather copy

2017-06-15T12:25:56+00:00

The blocking gather copy allocation is a major performance downside of the
Host1x firewall, it may take hundreds milliseconds which is unacceptable
for the real-time graphics operations. Let's try a non-blocking allocation
first as a least invasive solution, it makes opentegra (Xorg driver)
performance indistinguishable with/without the firewall.

Signed-off-by: Dmitry Osipenko 
Reviewed-by: Erik Faye-Lund 
Signed-off-by: Thierry Reding

gpu: host1x: Refactor channel allocation code

2017-06-15T12:25:38+00:00

This is largely a rewrite of the Host1x channel allocation code, bringing
several changes:

- The previous code could deadlock due to an interaction
  between the 'reflock' mutex and CDMA timeout handling.
  This gets rid of the mutex.
- Support for more than 32 channels, required for Tegra186
- General refactoring, including better encapsulation
  of channel ownership handling into channel.c

Signed-off-by: Mikko Perttunen 
Reviewed-by: Dmitry Osipenko 
Tested-by: Dmitry Osipenko 
Signed-off-by: Thierry Reding

gpu: host1x: Remove unused host1x_cdma_stop() definition

2017-06-15T12:25:18+00:00

There is no host1x_cdma_stop() in the code, let's remove its definition
from the header file.

Signed-off-by: Dmitry Osipenko 
Reviewed-by: Erik Faye-Lund 
Reviewed-by: Mikko Perttunen 
Signed-off-by: Thierry Reding

gpu: host1x: Remove unused 'struct host1x_cmdbuf'

2017-06-15T12:24:59+00:00

The struct host1x_cmdbuf is unused, let's remove it.

Signed-off-by: Dmitry Osipenko 
Reviewed-by: Erik Faye-Lund 
Reviewed-by: Mikko Perttunen 
Signed-off-by: Thierry Reding

gpu: host1x: Check waits in the firewall

2017-06-15T12:24:41+00:00

Check waits in the firewall in a way it is done for relocations.

Signed-off-by: Dmitry Osipenko 
Reviewed-by: Mikko Perttunen 
Reviewed-by: Erik Faye-Lund 
Signed-off-by: Thierry Reding

gpu: host1x: Forbid unrelated SETCLASS opcode in the firewall

2017-06-15T12:23:50+00:00

Several channels could be made to write the same unit concurrently via
the SETCLASS opcode, trusting userspace is a bad idea. It should be
possible to drop the per-client channel reservation and add a per-unit
locking by inserting MLOCK's to the command stream to re-allow the
SETCLASS opcode, but it will be much more work. Let's forbid the
unit-unrelated class changes for now.

Signed-off-by: Dmitry Osipenko 
Reviewed-by: Erik Faye-Lund 
Reviewed-by: Mikko Perttunen 
Signed-off-by: Thierry Reding

gpu: host1x: Forbid RESTART opcode in the firewall

2017-06-15T12:23:18+00:00

The RESTART opcode terminates the gather and restarts the CDMA fetching
from a specified word << 2 relative to the CDMA start address. That
shouldn't be allowed to be done by userspace.

Signed-off-by: Dmitry Osipenko 
Reviewed-by: Erik Faye-Lund 
Reviewed-by: Mikko Perttunen 
Signed-off-by: Thierry Reding