the code always returns ret regardless, so if(ret) check is unnecessary.

v2: fixed up the spelling.
Signed-off-by: NGreg Dietsche <Gregory.Dietsche@cuw.edu>
Reviewed-by: NNicolas Kaiser <nikai@nikai.net>
Signed-off-by: NDave Airlie <airlied@redhat.com>

With the current screwed but its ABI, ioctls for the drm, Linus pointed out that we could allow userspace to specify the allocation size, but we pass it to the driver which then uses it blindly to store a struct. Now if userspace specifies the allocation size as smaller than the driver needs, the driver can possibly overwrite memory.

This patch restructures the driver ioctls so we store the structure size we are expecting, and make sure we allocate at least that size. The copy from/to userspace are still restricted to the size the user specifies, this allows ioctl structs to grow on both sides of the equation.

Up until now we didn't really use the DRM_IOCTL defines in the kernel, so this cleans them up and adds them for nouveau.

v2:
fix nouveau pushbuf arg (thanks to Ben for pointing it out)
Reported-by: NLinus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Remove the drm_resource wrappers and directly use the
actual PCI and/or platform functions in their place.

[airlied: fixup nouveau properly to build]
Signed-off-by: NJordan Crouse <jcrouse@codeaurora.org>
Reviewed-by: NMatt Turner <mattst88@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Use kzalloc rather than the combination of kmalloc and memset.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,size,flags;
statement S;
@@

-x = kmalloc(size,flags);
+x = kzalloc(size,flags);
 if (x == NULL) S
-memset(x, 0, size);
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Reviewed-by: NCorbin Simpson <MostAwesomeDude@gmail.com>
Reviewed-by: NMatt Turner <mattst88@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

It hasn't been used in ages, and having the user tell your how much
memory is being freed at free time is a recipe for disaster even if it
was ever used.
Signed-off-by: NEric Anholt <eric@anholt.net>

The DRM uses its own wrappers to obtain resources from PCI devices,
which currently convert the resource_size_t into an unsigned long.

This is broken on 32-bit platforms with >32-bit physical address
space.

This fixes them, along with a few occurences of unsigned long used
to store such a resource in drivers.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NDave Airlie <airlied@linux.ie>

With the coming of kernel based modesetting and the memory manager stuff,
the everything in one directory approach was getting very ugly and
starting to be unmanageable.

This restructures the drm along the lines of other kernel components.

It creates a drivers/gpu/drm directory and moves the hw drivers into
subdirectores. It moves the includes into an include/drm, and
sets up the unifdef for the userspace headers we should be exporting.
Signed-off-by: NDave Airlie <airlied@redhat.com>

This is a bug in the savage driver since I introduced these changes.
Signed-off-by: NDave Airlie <airlied@redhat.com>

The data is now in kernel space, copied in/out as appropriate according to t
This results in DRM_COPY_{TO,FROM}_USER going away, and error paths to deal
with those failures.  This also means that XFree86 4.2.0 support for i810 DR
is lost.
Signed-off-by: NDave Airlie <airlied@linux.ie>

As a fallout, replace filp storage with file_priv storage for "unique
identifier of a client" all over the DRM.  There is a 1:1 mapping, so this
should be a noop.  This could be a minor performance improvement, as everyth
on Linux dereferenced filp to get file_priv anyway, while only the mmap ioct
went the other direction.
Signed-off-by: NDave Airlie <airlied@linux.ie>

This was used to make all ioctl handlers return -errno on linux and errno on
*BSD.  Instead, just return -errno in shared code, and flip sign on return f
shared code to *BSD code.
Signed-off-by: NDave Airlie <airlied@linux.ie>

Signed-off-by: NDave Airlie <airlied@linux.ie>

Signed-off-by: NDave Airlie <airlied@linux.ie>

Signed-off-by: NDave Airlie <airlied@linux.ie>

Signed-off-by: NDave Airlie <airlied@linux.ie>

Signed-off-by: NDave Airlie <airlied@linux.ie>

fd.o bug 8662
Signed-off-by: NDave Airlie <airlied@linux.ie>

From: Adrian Bunk <bunk@stusta.de>

This patch makes some needlessly global functions static.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NDave Airlie <airlied@linux.ie>

apply some whitespace cleanup and add wrappers for MTRR for OS calls

From: Eric Anholt <anholt@freebsd.org> + Dave Airlie <airlied@linux.ie>
Signed-off-by: NDave Airlie <airlied@linux.ie>

From: Dave Airlie
Signed-off-by: NDave Airlie <airlied@linux.ie>

Rename the driver hooks in the DRM to something a little more understandable:
preinit         ->      load
postinit        ->      (removed)
presetup        ->      firstopen
postsetup       ->      (removed)
open_helper     ->      open
prerelease      ->      preclose
free_filp_priv  ->      postclose
pretakedown     ->      lastclose
postcleanup     ->      unload
release         ->      reclaim_buffers_locked
version         ->      (removed)

postinit and version were replaced with generic code in the Linux DRM (drivers
now set their version numbers and description in the driver structure, like on
BSD).  postsetup wasn't used at all.  Fixes the savage hooks for
initializing and tearing down mappings at the right times.  Testing involved at
least starting X, running glxgears, killing glxgears, exiting X, and repeating.

Tested on:      FreeBSD (g200, g400, r200, r128)
                Linux (r200, savage4)

From: Eric Anholt <anholt@freebsd.org>
Signed-off-by: NDave Airlie <airlied@linux.ie>

Signed-off-by: NDave Airlie <airlied@linux.ie>

I've been threatening this for a while, so no point hanging around.
This lindents the DRM code which was always really bad in tabbing department.
I've also fixed some misnamed files in comments and removed some trailing
whitespace.
Signed-off-by: NDave Airlie <airlied@linux.ie>

Add driver for savage chipsets.

From: Felix Kuehling
Signed-off-by: NDave Airlie <airlied@linux.ie>