All the various window system integration layers duplicate roughly the
same code for figuring out device and driver name, pci-id's, etc.  Which
is sad.  So extract it out into a loader util lib.

v2 (Emil)
* Separate the introduction of libloader from the code de-duplication.
* Strip out non-pci devices support.
* Add scons + Android build system support.
* Add VISIBILITY_CFLAGS to avoid exporting the loader funcs.

v3 (Emil)
* PIPE_OS_ANDROID is undefined at this scope, use ANDROID
* Make sure we define _EGL_NO_DRM when building only swrast

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

It can be selected with

  BOARD_GPU_DRIVERS := ilo

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

Define the following Make variables:
    MESA_ANDROID_MAJOR_VERSION
    MESA_ANDROID_MINOR_VERSION
    MESA_ANDROID_VERSION

These variable will allow us to make version-dependent decisions on
library dependencies. In particular, building Mesa against JellyBean will
require libsync.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>

This commit adds initial support for acceleration
on SI chips.  egltri is starting to work.

The SI/R600 llvm backend is currently included in mesa
but that may change in the future.

The plan is to write a single gallium driver and
use gallium to support X acceleration.

This commit contains patches from:
Tom Stellard <thomas.stellard@amd.com>
Michel Dänzer <michel.daenzer@amd.com>
Alex Deucher <alexander.deucher@amd.com>
Vadim Girlin <vadimgirlin@gmail.com>

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

The following commits were squashed in:

======================================================================

radeonsi: Remove unused winsys pointer

This was removed from r600g in commit:

commit 96d882939d
Author: Marek Olšák <maraeo@gmail.com>
Date:   Fri Feb 17 01:49:49 2012 +0100

    gallium: remove unused winsys pointers in pipe_screen and pipe_context

    A winsys is already a private object of a driver.

======================================================================

radeonsi: Copy color clamping CAPs from r600

Not sure if the values of these CAPS are correct for radeonsi, but the
same changed were made to r600g in commit:

commit bc1c836938
Author: Marek Olšák <maraeo@gmail.com>
Date:   Mon Jan 23 03:11:17 2012 +0100

    st/mesa: do vertex and fragment color clamping in shaders

    For ARB_color_buffer_float. Most hardware can't do it and st/mesa is
    the perfect place for a fallback.
    The exceptions are:
    - r500 (vertex clamp only)
    - nv50 (both)
    - nvc0 (both)
    - softpipe (both)

    We also have to take into account that r300 can do CLAMPED vertex colors only,
    while r600 can do UNCLAMPED vertex colors only. The difference can be expressed
    with the two new CAPs.

======================================================================

radeonsi: Remove PIPE_CAP_OUTPUT_READ

This CAP was dropped in commit:

commit 04e3240087
Author: Marek Olšák <maraeo@gmail.com>
Date:   Thu Feb 23 23:44:36 2012 +0100

    gallium: remove PIPE_SHADER_CAP_OUTPUT_READ

    r600g is the only driver which has made use of it. The reason the CAP was
    added was to fix some piglit tests when the GLSL pass lower_output_reads
    didn't exist.

    However, not removing output reads breaks the fallback for glClampColorARB,
    which assumes outputs are not readable. The fix would be non-trivial
    and my personal preference is to remove the CAP, considering that reading
    outputs is uncommon and that we can now use lower_output_reads to fix
    the issue that the CAP was supposed to workaround in the first place.

======================================================================

radeonsi: Add missing parameters to rws->buffer_get_tiling() call

This was changed in commit:

commit c0c979eebc
Author: Jerome Glisse <jglisse@redhat.com>
Date:   Mon Jan 30 17:22:13 2012 -0500

    r600g: add support for common surface allocator for tiling v13

    Tiled surface have all kind of alignment constraint that needs to
    be met. Instead of having all this code duplicated btw ddx and
    mesa use common code in libdrm_radeon this also ensure that both
    ddx and mesa compute those alignment in the same way.

    v2 fix evergreen
    v3 fix compressed texture and workaround cube texture issue by
       disabling 2D array mode for cubemap (need to check if r7xx and
       newer are also affected by the issue)
    v4 fix texture array
    v5 fix evergreen and newer, split surface values computation from
       mipmap tree generation so that we can get them directly from the
       ddx
    v6 final fix to evergreen tile split value
    v7 fix mipmap offset to avoid to use random value, use color view
       depth view to address different layer as hardware is doing some
       magic rotation depending on the layer
    v8 fix COLOR_VIEW on r6xx for linear array mode, use COLOR_VIEW on
       evergreen, align bytes per pixel to a multiple of a dword
    v9 fix handling of stencil on evergreen, half fix for compressed
       texture
    v10 fix evergreen compressed texture proper support for stencil
        tile split. Fix stencil issue when array mode was clear by
        the kernel, always program stencil bo. On evergreen depth
        buffer bo need to be big enough to hold depth buffer + stencil
        buffer as even with stencil disabled things get written there.
    v11 rebase on top of mesa, fix pitch issue with 1d surface on evergreen,
        old ddx overestimate those. Fix linear case when pitch*height < 64.
        Fix r300g.
    v12 Fix linear case when pitch*height < 64 for old path, adapt to
        libdrm API change
    v13 add libdrm check

    Signed-off-by: Jerome Glisse <jglisse@redhat.com>

======================================================================

radeonsi: Remove PIPE_TRANSFER_MAP_PERMANENTLY

This was removed in commit:

commit 62f44f670b
Author: Marek Olšák <maraeo@gmail.com>
Date:   Mon Mar 5 13:45:00 2012 +0100

    Revert "gallium: add flag PIPE_TRANSFER_MAP_PERMANENTLY"

    This reverts commit 0950086376.

    It was decided to refactor the transfer API instead of adding workarounds
    to address the performance issues.

======================================================================

radeonsi: Handle PIPE_VIDEO_CAP_PREFERED_FORMAT.

Reintroduced in commit 9d9afcb5ba.

======================================================================

radeonsi: nuke the fallback for vertex and fragment color clamping

Ported from r600g commit c2b800cf38.

======================================================================

radeonsi: don't expose transform_feedback2 without kernel support

Ported from r600g commit 15146fd1bc.

======================================================================

radeonsi: Handle PIPE_CAP_GLSL_FEATURE_LEVEL.

Ported from r600g part of commit 171be75522.

======================================================================

radeonsi: set minimum point size to 1.0 for non-sprite non-aa points.

Ported from r600g commit f183cc9ce3.

======================================================================

radeonsi: rework and consolidate stencilref state setting.

Ported from r600g commit a2361946e7.

======================================================================

radeonsi: cleanup setting DB_SHADER_CONTROL.

Ported from r600g commit 3d061caaed.

======================================================================

radeonsi: Get rid of register masks.

Ported from r600g commits
3d061caaed13b646ff40754f8ebe73f3d4983c5b..9344ab382a1765c1a7c2560e771485edf4954fe2.

======================================================================

radeonsi: get rid of r600_context_reg.

Ported from r600g commits
9344ab382a1765c1a7c2560e771485edf4954fe2..bed20f02a771f43e1c5092254705701c228cfa7f.

======================================================================

radeonsi: Fix regression from 'Get rid of register masks'.

======================================================================

radeonsi: optimize r600_resource_va.

Ported from r600g commit 669d8766ff.

======================================================================

radeonsi: remove u8,u16,u32,u64 types.

Ported from r600g commit 78293b99b2.

======================================================================

radeonsi: merge r600_context with r600_pipe_context.

Ported from r600g commit e4340c1908.

======================================================================

radeonsi: Miscellaneous context cleanups.

Ported from r600g commits
e4340c1908a6a3b09e1a15d5195f6da7d00494d0..621e0db71c5ddcb379171064a4f720c9cf01e888.

======================================================================

radeonsi: add a new simple API for state emission.

Ported from r600g commits
621e0db71c5ddcb379171064a4f720c9cf01e888..f661405637bba32c2cfbeecf6e2e56e414e9521e.

======================================================================

radeonsi: Also remove sbu_flags member of struct r600_reg.

Requires using sid.h instead of r600d.h for the new CP_COHER_CNTL definitions,
so some code needs to be disabled for now.

======================================================================

radeonsi: Miscellaneous simplifications.

Ported from r600g commits 38bf276348 and
b0337b679a.

======================================================================

radeonsi: Handle PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION.

Ported from commit 8b4f7b0672.

======================================================================

radeonsi: Use a fake reloc to sleep for fences.

Ported from r600g commit 8cd03b933c.

======================================================================

radeonsi: adapt to get_query_result interface change.

Ported from r600g commit 4445e170be.

Keep the top-level Android.mk away from building modules.

To match targerts/dri-nouveau, and to fix a potential

  "undefined reference to `nv50_ir::getTargetNVC0(unsigned int)'"

error.

Be sure to reconfigure after this commit.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

Simple demos such as test-opengl-gl_basic work.  SurfaceFlinger does not
work yet due to missing GL_OES_draw_texture support (and maybe more).

Reviewed-by: Chad Versace <chad@chad-versace.us>

Compile tested only.

Reviewed-by: Chia-I Wu <olv@lunarg.com>
Signed-off-by: Chad Versace <chad@chad-versace.us>

libmesa_dri_common is a static library that contains the sources in
src/mesa/drivers/dri/common. Each DRI driver should link to it.

Reviewed-by: Chia-I Wu <olv@lunarg.com>
Signed-off-by: Chad Versace <chad@chad-versace.us>

Add rules to build egl_dri2 and make it a built-in EGL driver of
libGLES_mesa.

Reviewed-by: Chad Versace <chad@chad-versace.us>

For BOARD_GPU_DRIVERS=swrast build, DRM is not needed.

Compile tested only.

Compile tested only.

Quickly tested with 945GME.  SurfaceFlinger (the display server and
compositor) works.  2D apps with RGB or RGBA visuals work.  As for 3D
apps, some work and some do not.

Quickly tested with VMWare Workstation 7.1.4 on Linux with GeForce
GT220.  SurfaceFlinger (the display server and compositor) works.  2D
apps with RGB visual works.  However, due to missing
PIPE_FORMAT_R8G8B8A8_UNORM support, those with RGBA visual do not.

Tested with a Radeon HD 6250.  SurfaceFlinger (the display server and
compositor) works.  2D apps with RGB or RGBA visuals work.  As for 3D
apps, some work but some don't (with serious rendering defects).

Reviewed-by: Marek Olšák <maraeo@gmail.com>

libGLES_mesa with swrast should link in these libraries

  libmesa_egl
  libmesa_egl_gallium
  libmesa_st_egl
  libmesa_st_mesa
  libmesa_glsl
  libmesa_glsl_utils
  libmesa_pipe_softpipe
  libmesa_winsys_sw_android
  libmesa_gallium

Reviewed-by: Chad Versace <chad@chad-versace.us>

This builds the shared library libglapi from shared glapi.

Reviewed-by: Chad Versace <chad@chad-versace.us>

This builds the static library libmesa_glsl and executable glsl_compiler
from glsl.  glsl_compiler is only installed for engineering build.

Reviewed-by: Chad Versace <chad@chad-versace.us>

This builds the static library libmesa_st_mesa from core mesa.

Acked-by: Chad Versace <chad@chad-versace.us>

This builds the static library libmesa_egl from core EGL.

Reviewed-by: Chad Versace <chad@chad-versace.us>

This builds the static library libmesa_gallium from gallium auxiliaries.

This is the first step to integrate Mesa into Android(-x86) build
system.  You can git clone mesa under the external/ directory of Android
source tree and build Android with

 $ make BOARD_GPU_DRIVERS=swrast

It will build libGLES_mesa that will be loaded by Android runtime.

libGLES_mesa is still a stub in this commit.