Revert "r600g: only flush the caches that need to be flushed during CP DMA operations"

This reverts commit 7948ed1250cae78ae1b22dbce4ab23aceacc6159.

It caused graphical corruption. I've got no idea why.

Bugzilla:
https://bugs.freedesktop.org/show_bug.cgi?id=70042
https://bugs.freedesktop.org/show_bug.cgi?id=68451

Conflicts:
	src/gallium/drivers/r600/evergreen_hw_context.c
	src/gallium/drivers/r600/r600_hw_context.c
	src/gallium/drivers/r600/r600_pipe.h
glsl: Fix usage of the wrong union member in program_resource_visitor::recursion.

In the array-of-struct case, recursion() takes the row_major flag for
each iteration from 't->fields.structure[i]', but 't' is not a record
type.  Inherit the array declaration row_major flag instead.

This mistake was found by running piglit on valgrind.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=69449
Cc: "9.1 9.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Tested-by: Kenneth Graunke <kenneth@whitecape.org>
dri/nouveau: add AllocTextureImageBuffer implementation

This fixes issues where get_rt_format would see a 0 format because the
nouveau_surface had not been properly initialized. Fixes crash on
supertuxkart startup (which still fails due to out-of-vram issues).

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
docs: Mark a few more things as "in progress" in GL3.txt.
glsl: Add ARB_gpu_shader5 textureGatherOffset signatures

- gsampler2DRect
- optional `comp` parameter

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
glsl: relax const offset requirement for textureGatherOffset

Prior to ARB_gpu_shader5 / GLSL 4.0, the offset is required to be
a constant expression.

With that extension, it is relaxed to be any dynamically uniform
expression. If the value is not dynamically uniform, the results
are undefined.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>