r600g/compute: Try to use a temporary resource when growing the pool

Now, before moving everything to host memory, we try to create a
new resource to use as a pool. I we succeed we just use this resource
and delete the previous one. If we fail we fallback to using the
shadow.

This should make growing the pool faster, and we can also save
64KB of memory that were allocated for the 'shadow', even if they
weren't used.

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
r600g/compute: Defrag the pool at the same time as we grow it

This allows us two things: we now need less item copies when we have
to defrag+grow the pool (to just one copy per item) and, even in the
case where we don't need to defrag the pool, we reduce the data copied
to just the useful data that the items use.

Note: The fallback path is a bit ugly now, but hopefully we won't need
it much.

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
ilo: simplify ilo_flush()

Move fence creation to the new ilo_fence_create().
glsl: Allow non-constant UBO array indexing with GLSL4/ARB_gpu_shader5.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
glsl: Mark entire UBO array active if indexed with non-constant.

Without doing a lot more work, we have no idea which indices may
be used at runtime, so just mark them all.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
glsl: Convert uniform_block in lower_ubo_reference to ir_rvalue.

Previously this was a block index with special semantics for -1.
With ARB_gpu_shader5, this need not be a compile-time constant, so
allow any rvalue here and convert the -1 to a NULL pointer.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
glsl: Accept nonconstant array references in lower_ubo_reference

Instead of falling back to just the block name (which we won't find),
look for the first element of the block array. We'll deal with the rest
in the backend by arranging for the blocks to be laid out contiguously.

V2: Squashed together patches 3, 5 of V1, plus a naming tweak.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
glsl: No longer require ubo block index to be constant in ir_validate

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
main/cs: Add additional compute shader constant values

With MESA_EXTENSION_OVERRIDE=GL_ARB_compute_shader, this fixes piglit:
* arb_compute_shader-minmax

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
glsl/cs: Add several GLSL compute shader variables

With MESA_EXTENSION_OVERRIDE=GL_ARB_compute_shader, this fixes piglit:
built-in-constants tests/spec/arb_compute_shader/minimum-maximums.txt

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
clover: Add clCreateProgramWithBuiltInKernels.

[ Francisco Jerez: Check for devices not associated with the specified
  context.  Style fix. ]

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
clover: Add clUnloadPlatformCompiler.

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
ilo: free transfers with util_slab_free()

We used FREE() in one of the error path.
ilo: tidy up choose_transfer_method()

Add a bunch of helper functions and a big comment for
choose_transfer_method().  This also fixes handling of
PIPE_TRANSFER_MAP_DIRECTLY to not ignore tiling.
ilo: tidy up transfer mapping/unmapping

Add xfer_map() to replace map_bo_for_transfer().  Add xfer_unmap() and
xfer_alloc_staging_sys() to simplify texture and buffer mapping/unmapping, and
enable more code sharing between them.
ilo: drop unused context param from transfer functions

Many of the transfer functions do not need an ilo_context.  Drop it.
ilo: s/TRANSFER_MAP_UNSYNC/TRANSFER_MAP_GTT_UNSYNC/

It maps to drm_intel_gem_bo_map_unsynchronized(), which results in
unsynchronized GTT mapping.
ilo: drop ptr from ilo_transfer

With the recent clean-ups, we can pass the mapped pointer around between
functions cleanly.  Drop it to make ilo_transfer smaller.
ilo: enable persistent and coherent transfers

Enable PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT and reorder caps a bit.
ilo: try unblocking a transfer with a staging bo

When mapping a busy resource with PIPE_TRANSFER_DISCARD_RANGE or
PIPE_TRANSFER_FLUSH_EXPLICIT, we can avoid blocking by allocating and mapping
a staging bo, and emit pipelined copies at proper places.  Since the staging
bo is never bound to GPU, we give it packed layout to save space.