linux.git/drivers/gpu/drm/drm_ioctl.c, branch v3.12.53

drm: Advertise async page flip ability through GETCAP ioctl

2013-08-29T23:25:13+00:00

Let applications know whether the kernel supports asynchronous page
flipping.

Signed-off-by: Keith Packard 
Signed-off-by: Dave Airlie

drm: no-op out GET_STATS ioctl

2013-08-19T00:06:24+00:00

Again only used by a tests in libdrm and by dristat. Nowadays we have
much better tracing tools to get detailed insights into what a drm
driver is doing. And for a simple "does it work" kind of question that
these stats could answer we have plenty of dmesg debug log spew.

So I don't see any use for this stat gathering complexity at all.

To be able to gradually drop things start with ripping out the
interfaces to it, here the ioctl.

To prevent dristat from eating its own stack garbage we can't use the
drm_noop ioctl though, since we need to clear the return data with a
memset.

Cc: Eric Anholt 
Signed-off-by: Daniel Vetter 
Reviewed-by: Eric Anholt 
Signed-off-by: Dave Airlie

drm: hollow-out GET_CLIENT ioctl

2013-08-19T00:05:54+00:00

We not only have debugfs files to do pretty much the equivalent of
lsof, we also have an ioctl. Not that compared to lsof this dumps a
wee bit more information, but we can still get at that from debugfs
easily.

I've dug around in mesa, libdrm and ddx histories and the only users
seem to be drm/tests/dristat.c and drm/tests/getclients.c. The later
is a testcase for the ioctl itself since up to

commit b018fcdaa5e8b4eabb8cffda687d00004a3c4785
Author: Eric Anholt 
Date:   Thu Nov 22 18:46:54 2007 +1000

    drm: Make DRM_IOCTL_GET_CLIENT return EINVAL when it can't find client #idx

there was actually no way at all for userspace to enumerate all
clients since the kernel just wouldn't tell it when to stop. Which
completely broke it's only user, dristat -c.

So obviously that ioctl wasn't much use for debugging. Hence I don't
see any point in keeping support for a tool which was pretty obviously
never really used, and while we have good replacements in the form of
equivalent debugfs files.

Still, to keep dristat -c from looping forever again stop it early by
returning an unconditional -EINVAL. Also add a comment in the code
about why.

v2: Slightly less hollowed-out implementation. libva uses GET_CLIENTS
to figure out whether the fd it has is already authenticated or not.
So we need to keep that part of things working. Simplest way is to
just return one entry to keep va_drm_is_authenticated in
libva/va/drm/va_drm_auth.c working.

This is exercised by igt/drm_get_client_auth which contains a
copypasta of the libva auth check code.

Cc: Gwenole Beauchesne 
Cc: David Herrmann 
Reviewed-by: David Herrmann 
Reviewed-by: Eric Anholt 
Signed-off-by: Daniel Vetter 
Signed-off-by: Dave Airlie

drm: kill dev->driver->set_version

2013-08-19T00:03:26+00:00

Totally unused, so just rip it out. Anyway, we want drivers to be
fully backwards compatible, allowing them to change behaviour is just
a recipe for them to break badly.

Reviewed-by: Eric Anholt 
Reviewed-by: Rob Clark 
Signed-off-by: Daniel Vetter 
Signed-off-by: Dave Airlie

drm: Don't leak phys_wc "handles" to userspace

2013-05-31T03:37:39+00:00

I didn't fix this in the earlier patch -- it would have broken the
build due to the now-deleted garbage in drm_os_linux.h.

Reviewed-by: Daniel Vetter 
Signed-off-by: Andy Lutomirski 
Signed-off-by: Dave Airlie

drm: add support for monotonic vblank timestamps

2012-11-20T06:06:16+00:00

Jumps in the vblank and page flip event timestamps cause trouble for
clients, so we should avoid them. The timestamp we get currently with
gettimeofday can jump, so use instead monotonic timestamps.

For backward compatibility use a module flag to revert back to using
gettimeofday timestamps. Add also a DRM_CAP_TIMESTAMP_MONOTONIC flag
that is simply a read only version of the module flag, so that clients
can query this without depending on sysfs.

Signed-off-by: Imre Deak 
Signed-off-by: Dave Airlie

Merge tag 'uapi-prep-20121002' of git://git.infradead.org/users/dhowells/linux-headers

2012-10-03T20:45:43+00:00

Pull preparatory patches for user API disintegration from David Howells:
 "The patches herein prepare for the extraction of the Userspace API
  bits from the various header files named in the Kbuild files.

  New subdirectories are created under either include/uapi/ or
  arch/x/include/uapi/ that correspond to the subdirectory containing
  that file under include/ or arch/x/include/.

  The new subdirs under the uapi/ directory are populated with Kbuild
  files that mostly do nothing at this time.  Further patches will
  disintegrate the headers in each original directory and fill in the
  Kbuild files as they do it.

  These patches also:

   (1) fix up #inclusions of "foo.h" rather than .

   (2) Remove some redundant #includes from the DRM code.

   (3) Make the kernel build infrastructure handle Kbuild files both in
       the old places and the new UAPI place that both specify headers
       to be exported.

   (4) Fix some kernel tools that #include kernel headers during their
       build.

  I have compile tested this with allyesconfig against x86_64,
  allmodconfig against i386 and a scattering of additional defconfigs of
  other arches.  Prepared for main script

  Signed-off-by: David Howells 
  Acked-by: Arnd Bergmann 
  Acked-by: Thomas Gleixner 
  Acked-by: Michael Kerrisk 
  Acked-by: Paul E. McKenney 
  Acked-by: Dave Jones 
  Acked-by: H. Peter Anvin "

* tag 'uapi-prep-20121002' of git://git.infradead.org/users/dhowells/linux-headers:
  UAPI: Plumb the UAPI Kbuilds into the user header installation and checking
  UAPI: x86: Differentiate the generated UAPI and internal headers
  UAPI: Remove the objhdr-y export list
  UAPI: Move linux/version.h
  UAPI: Set up uapi/asm/Kbuild.asm
  UAPI: x86: Fix insn_sanity build failure after UAPI split
  UAPI: x86: Fix the test_get_len tool
  UAPI: (Scripted) Set up UAPI Kbuild files
  UAPI: Partition the header include path sets and add uapi/ header directories
  UAPI: (Scripted) Convert #include "..." to #include  in kernel system headers
  UAPI: (Scripted) Convert #include "..." to #include  in drivers/gpu/
  UAPI: (Scripted) Remove redundant DRM UAPI header #inclusions from drivers/gpu/.
  UAPI: Refer to the DRM UAPI headers with <...> and from certain headers only

UAPI: (Scripted) Convert #include "..." to #include in drivers/gpu/

2012-10-02T17:01:07+00:00

Convert #include "..." to #include  in drivers/gpu/.

Signed-off-by: David Howells 
Acked-by: Dave Airlie 
Acked-by: Arnd Bergmann 
Acked-by: Thomas Gleixner 
Acked-by: Paul E. McKenney 
Acked-by: Dave Jones

userns: Convert drm to use kuid and kgid and struct pid where appropriate

2012-09-13T21:32:24+00:00

Blink Blink this had not been converted to use struct pid ages ago?

- On drm open capture the openers kuid and struct pid.
- On drm close release the kuid and struct pid
- When reporting the uid and pid convert the kuid and struct pid
  into values in the appropriate namespace.

Cc: dri-devel@lists.freedesktop.org
Acked-by: Dave Airlie 
Acked-by: Serge Hallyn 
Signed-off-by: Eric W. Biederman

drm/prime: expose capability flags for userspace.

2012-05-18T10:12:16+00:00

This lets the kernel tell userspace if the device supports prime
import/export.

This is useful for -modesetting at least, but would be nice for other
drivers.

Reviewed-by: Chris Wilson 
Signed-off-by: Dave Airlie