i965: Ensure that intel_bufferobj_map_range meets alignment guarantees

No piglit regressions on IVB.

With minor tweaks to the arb_map_buffer_alignment-map-invalidate-range
test (disable the extension check, set alignment to 64 instead of
querying), the i965 driver would fail the test without this patch (as
predicted by Eric).  With this patch, it passes.

v2: Remove MAX2(64, ...).  Suggested by Ken.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Cc: Siavash Eliasi <siavashserver@gmail.com>

docs: Note that GL_ARB_viewport_array is done on i965

At least for GEN7+, anyway.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

i965: Enable ARB_viewport_array

v2 (idr): Only enable the extension on GEN7+ w/core profile because it
requires geometry shaders.

v3 (idr): Add some casting to fix setting of ViewportBounds.Min.
Negating an unsigned value, then casting to float doesn't do what you
might think it does.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

i965: Consider all viewports before enabling guardband clipping

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

i965: Consider only the scissor rectangle for viewport 0 for clears

noop_scissor (correctly) only examines the scissor rectangle for
viewport 0.  Therefore, it should only be called when that scissor
rectangle is enabled.

v2: Remove spurious change to radeon code.  Noticed by Ken.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

i965: Set all the supported scissor rectangles for GEN7

Currently MaxViewports is still 1, so this won't affect any change.

v2: Minor code reformatting suggested by Ken.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Refactor bounding-box calculation out of _mesa_update_draw_buffer_bounds

Drivers that currently use _Xmin and friends to set their scissor
rectangle will need to use this code directly once they are updated for
GL_ARB_viewport_array.

v2: Use different bit-test idiom and fix mixed tabs and spaces.  Both
were suggested by Ken.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

i965: Set all the supported viewports for GEN7

Currently MaxViewports is still 1, so this won't affect any change.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

i965: Emit writes to viewport index

This variable is handled in a fashion identical to gl_Layer.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

i965: Set the maximum VPIndex

At various stages the hardware clamps the gl_ViewportIndex to these
values.  Setting them to zero effectively makes gl_ViewportIndex be
ignored.  This is acutally useful in blorp (so that we don't have to
modify all of the viewport / scissor state).

v2: Use INTEL_MASK to create GEN6_CLIP_MAX_VP_INDEX_MASK.  Suggested by
Ken.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Add ARB_viewport_array plumbing

Define API connections to extension entry points added in previous
commits. Update entry points to use floating point arguments as
required by the extension.
Add get tokens for ARB_viewport_array state.

v2: Include review feedback.

v3 (idr): Fix 'make check'.  Add missing Get infrastructure (some was
culled from other pathces).

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

glsl: Add gl_ViewportIndex built-in variable

v2 (idr): Fix copy-and-paste bug... s/LAYER/VIEWPORT/

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

glsl: Add extension infrastructure for ARB_viewport_array

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Add varying slot for viewport index

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Add new viewport and depth-range entry points for GL_ARB_viewport_array

v2 (idr): Use set_viewport_no_notify / set_depth_range_no_notify (and
manually notify the driver) instead of calling _mesa_set_viewporti /
_mesa_set_depthrangei.  Refactor bodies of _mesa_ViewportIndexed and
_mesa_ViewportIndexedv into a shared function.  Remove spurious CLAMP
calls in _mesa_DepthRangeArrayv and _mesa_DepthRangeIndexed.

v3 (idr): Add some missing return-statements after calls to _mesa_error.

v4 (idr): Only perform the ViewportBounds.Min / ViewportBounds.Max
clamping in set_viewport_no_notify if GL_ARB_viewport_array is enabled.
Otherwise the driver may not have set ViewportBounds, and the clamping
will do bad things.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Add new scissor entry points for GL_ARB_viewport_array

v2 (idr): Use set_scissor_no_notify (and manually notify the driver)
instead of calling _mesa_set_scissori.  Refactory bodies of
_mesa_ScissorIndexed and _mesa_ScissorIndexedv into a shared function.
Perform parameter validation in the same order in all three functions.
Pull MaxViewports comparison fix (in _mesa_ScissorArrayv) from the next
patch to this patch.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Add custom get function for SCISSOR_TEST to _mesa_IsEnabledi

Now that the scissor enable state is a bitfield need a custom function
to extract the correct value from gl_context.  Modeled
Scissor.EnableFlags after Color.BlendEnabled.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Add new get entrypoints for ARB_viewport_array

v2 (idr): Fix several "comparison between signed and unsigned integer
expressions" warnings.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Change parameter to _mesa_set_viewport to float

This matches the expectations of GL_ARB_viewport_array and the storage
type where the values will land.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

meta: Restore all scissor state

Previously the restore code would enable all scissor rectangles if any
scissor rectangles were enabled on entry to meta.  When there is only
one scissor rectangle, this is fine.  As soon as a driver supports
multiple viewports, this will be a problem.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Set all scissor rects

In _mesa_Scissor, make sure that ctx->Driver.Scissor is only called once
instead of once per scissor rectangle.

v2: Use MAX_VIEWPORTS instead of ctx->Const.MaxViewports because the
driver may not set ctx->Const.MaxViewports yet.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Set all viewports from _mesa_Viewport and _mesa_DepthRange

In _mesa_Viewport and _mesa_DepthRange, make sure that
ctx->Driver.Viewport is only called once instead of once per viewport or
depth range.

v2: Make _mesa_DepthRange actually set all of the depth ranges (instead
of just index 0).  Noticed by Ken.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Restore all the viewports in _mesa_PopAttrib

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Restore all the scissor rectangles in _mesa_PopAttrib

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Initialize all the viewports

v2: Use MAX_VIEWPORTS instead of ctx->Const.MaxViewports because the
driver may not set ctx->Const.MaxViewports yet.

v3: Handle all viewport entries in update_viewport_matrix and
_mesa_copy_context too.  This was previously in an earlier patch.
Having the code in the earlier patch could cause _mesa_copy_context to
access a matrix that hadn't been constructed.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> [v2]

mesa: Add an index parameter to _mesa_set_scissor

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Refactor scissor rectangle setting even more

Create an internal function that just writes data into the scissor
rectangle.  In future patches this will see more use because we only
want to call dd_function_table::Scissor once after setting all of the
scissor rectangles instead of once per scissor rectangle.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Refactor viewport setting even more

Create an internal function that just writes data into the viewport.  In
future patches this will see more use because we only want to call
dd_function_table::Viewport once after setting all of the viewport
instead of once per viewport.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Refactor depth range setting even more

Create an internal function that just writes data into the depth range.
In future patches this will see more use because we only want to call
dd_function_table::DepthRange once after setting all of the depth ranges
instead of once per depth range.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Add an index parameter to _mesa_set_viewport

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Convert gl_context::Viewport to gl_context::ViewportArray

Only element 0 of the array is used anywhere at this time, so there
should be no changes.

v4: Split out from a single megapatch.  Suggested by Ken.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Converty gl_viewport_attrib::X, ::Y, ::Width, and ::Height to float

v4: Split out from a single megapatch.  Suggested by Ken.  Also make
meta's save_state::ViewportX, ::ViewportY, ::ViewportW, and ::ViewportH
to match gl_viewport_attrib.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Convert gl_viewport_attrib::Near and ::Far to double

v4: Split out from a single megapatch.  Suggested by Ken.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Allow glGet of values that are 2 doubles

This will be used when the viewport near and far plane are stored as
doubles instead of as floats.

v4 (idr): Split out from a single megapatch.  Suggested by Ken.  Also
drop value_double_4.  It's never used anywhere in the patch series.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Move parameter validation from _mesa_set_viewport to _mesa_Viewport

Internal callers should do the right thing.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Update gl_scissor_attrib to support ARB_viewport_array

Update Mesa and drivers to access updated gl_scissor_attrib.
Now have an enable bitfield and array of gl_scissor_rects.
Drivers have been updated to the new scissor enable state
attribute (gl_context.scissor.EnableFlags) but still treat it
as a single boolean which is okay as mesa will only use
bit 0 when communicating with a driver that does not support
ARB_viewport_array.

v2 (idr): Rebase fixes.

v3 (idr): Small code formatting fix suggsted by Ken.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Add new constants related to GL_ARB_viewport_array

These limits will be queryable by GL_MAX_VIEWPORTS,
GL_VIEWPORT_SUBPIXEL_BITS, and GL_VIEWPORT_BOUNDS_RANGE.  Drivers that
actually implement the extension must set values for these constants
that comply with the minimum-maximums from the spec.

Most of these changes were part of other patches.  They were separated out
because it make reordering of later patches easier.  Also, MaxViewports wasn't
set by that patch, and I completely overlooked it in review.  It's now obvious
that it's set. :)

v2 (idr): Split these changes out from the original patches.  Keep
MaxViewportWidth and MaxViewportHeight as GLuint.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: Add extension tracking bit for ARB_viewport_array

v2 (idr): Split these changes out from the original patch.  Only
advertise GL_ARB_viewport_array in a core profile because it requires
geometry shaders.

Signed-off-by: Courtney Goeltzenleuchter <courtney@LunarG.com>
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

draw: use some cast wrappers in draw_pt_fetch_shade_pipeline*.c

Trivial.

draw: whitespace and formatting fixes in draw_pt_fetch_shade_pipeline*.c

Trivial.

draw: fix incorrect vertex size computation in LLVM drawing code

We were calling draw_total_vs_outputs() too early.  The call to
draw_pt_emit_prepare() could result in the vertex size changing.
So call draw_total_vs_outputs() after draw_pt_emit_prepare().

This fix would seem to be needed for the non-LLVM code as well,
but it's not obvious.  Instead, I added an assertion there to
try to catch this problem if it were to occur there.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=72926
Cc: 10.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: José Fonseca <jfonseca@vmware.com>

docs: note reduced display list memory usage in 10.1 relnotes

draw: clean up d3d style point clipping

Instead of skipping x/y clipping completely if there's point_tri_clip points
use guard band clipping. This should be easier (previously we could not disable
generating the x/y bits in the clip mask for llvm path, hence requiring custom
clip path), and it also allows us to enable this for tris-as-points more easily
too (this would require custom tri clip filtering too otherwise). Moreover,
some unexpected things could have happen if there's a NaN or just a huge number
in some tri-turned-point, as the driver's rasterizer would need to deal with it
and that might well lead to undefined behavior in typical rasterizers (which
need to convert these numbers to fixed point). Using a guardband should hence
be more robust, while "usually" guaranteeing the same results. (Only "usually"
because unlike hw guardbands draw guardband is always just twice the vp size,
hence small vp but large points could still lead to different results.)
Unfortunately because the clipmask generated is completely unaffected by guard
band clipping, we still need a custom clip stage for points (but not for tris,
as the actual clipping there takes guard band into account).

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

swrast: check for null/-1 when mapping renderbuffers

Fixes fbo-drawbuffers-none crash (but test still fails).
https://bugs.freedesktop.org/show_bug.cgi?id=73757

Reviewed-by: Roland Scheidegger <sroland@vmware.com>

softpipe: fix crash when accessing null colorbuffer

Fixes piglit fbo-missing-attachment-blit test.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73755

Reviewed-by: Roland Scheidegger <sroland@vmware.com>

st/vdpau: s/surface/resource/ to fix compiler warning

Reviewed-by: Christian König <christian.koenig@amd.com>

i915,r200,radeon,vega: Change vendor from "VMware, Inc." to "Mesa Project".

These are components which were originally developed by Tungsten Graphics,
which was in turn acquired by VMware, but are de facto now being maintained
by third-party contributors of the Mesa open-source community.

This matches what's reported by swrast driver and a few other components.

Suggested by Ian Romanick.

logger: Remove unused variable.

Silences gcc "unused variable ‘buf’" warning.

Trivial.

logger: s/\<log\>/log_/

Currently the MSVC build is broken because of conflicting definitions of
'log' function.  I didn't investigate thoroughly, but I suspect the
it is conflicting standard math.h's log.

log_ is admittedly not a great name, but it is better than a broken build.
A better one can be used in a follow-on build.

i965/blorp: reduce the scope of the explicit compression control

By highlighting these special cases makes it clearer to switch
to the fs-generator as the wider scoped compression control
settings used in the current implementation can be simply
dropped.

No regressions on IVB (piglit quick + unit tests).

v2 (Ian): typo in a comment

Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

i965/blorp: remove dependency to compression control state

Effectively only the mask control bit gets altered for the single
addition in question and hence there is no real need to use a
fresh state control level for it -- that is more useful when
multiple intructions share the same mask and compression settings.

This is a preparation step for removing the explicit compression
control modifiers in the blit compiler. After this patch there
are no nested state control levels making the constant nature of
the compression settings more apparent.

No regressions on IVB (piglit quick + unit tests).

v2 (Matt, Ian): use temporary variable instead of assigning
                directly on the same line with a function call.

Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

i965: Only update renderbuffers on initial intelMakeCurrent

We call intel_prepare_render() in intelMakeCurrent() to make sure we have
renderbuffers before calling _mesa_make_current().  The only reason we
do this is so that we can have valid defaults for width and height.
If we already have buffers for the drawable we're making current, we
don't need this step.

In itself, this is a small optimization, but it also avoids a round trip
that could block on the display server in a unexpected place.

https://bugs.freedesktop.org/show_bug.cgi?id=72540
https://bugs.freedesktop.org/show_bug.cgi?id=72612

Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Chad Versace <chad.versace@linux.intel.com>

st/vdpau: check surface params before creating surfaces

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Christian König <christian.koenig@amd.com>

st/vdpau: fix bogus error handling in output/bitmap creation

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Christian König <christian.koenig@amd.com>

st/vdpau: don't return a device if the screen doesn't support NPOT

NV3x cards don't support NPOT textures. Technically this restriction
could be worked around, but since it also doesn't expose any video
decoding hw, just turn it off entirely.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: 10.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Christian König <christian.koenig@amd.com>

pipe-loader: Fix build

pipe_loader_drm.c: In function 'pipe_loader_drm_probe_fd':
pipe_loader_drm.c:120:4: error: implicit declaration of function 'loader_get_pci_id_for_fd' [-Werror=implicit-function-declaration]

Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>

loader: ifdef libdrm specific code and include

Mesa provides the flexibility of building without the
need to have libdrm present on the system. The situation
has regressed with the recent commit

commit 8c2e7fd8460750543367053b1be9368cc38e1d6a
Author: Emil Velikov <emil.l.velikov@gmail.com>
Date:   Fri Jan 10 23:36:16 2014 +0000

    loader: introduce the loader util lib

By isolating libdrm code by #ifndef __NOT_HAVE_DRM_H we
can have libdrm-less builds on across all build systems.

This patch converts Android's _EGL_NO_DRM to __NOT_HAVE_DRM_H
to provide consistency with the other cases within mesa, allows
compilation of libloader on libdrm-less scons and conditionally
links against libdrm if present under automake.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73776
BUgzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73777
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

i965: Double the push constant space multipliers on Broadwell too.

Broadwell has 2Kb push constant size increments like Haswell GT3.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>

i965: Update invariant state for Broadwell.

The only difference is that STATE_SIP takes a 48-bit address, so we need
to output two zeroes.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>

i965: Use the Sandybridge VUE format on Broadwell as well.

It hasn't changed.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chad Versace <chad.versace@linux.intel.com>

i965: Create a new fragment shader backend for Broadwell.

This replaces the old fs_generator backend.

v2: Port to the C-based representation of assembly instructions.
    Fix texturing after the texture-grf merge.

v3: Add high quality derivative support.  Fix SET_SIMD4X2_OFFSET.

v4: Pass brw_context to gen8_instruction functions as required.

v5: Fixes for MRT, as well as zero render targets (alpha test only).

v6: Replace n-wide with SIMDn in comments and messages; port over
    Topi's blorp-generator changes; add missing TXF_MCS opcode,
    fix missing high quality derivatives for DDX; fix typo (all caught
    by Eric).  Simplify ADDC/SUBB handling; drop "Used only on Gen6+"
    comment (caught by Matt).  Emit SIMD16 versions of three source
    instructions (caught by both Eric and Matt).

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>

i965: Create a new vec4 backend for Broadwell.

This replaces the old vec4_generator backend.

v2: Port to use the C-based instruction representation.  Also, remove
    Geometry Shader offset hacks - the visitor will handle those instead
    of this code.

v3: Texturing fixes (including adding textureGather support).

v4: Pass brw_context to gen8_instruction functions as required.

v5: Add SHADER_OPCODE_TXF_MCS support; port DUAL_INSTANCED gs fixes
    (caught by Eric).  Simplify ADDC/SUBB handling; add comments to
    gen8_set_dp_message calls (suggested by Matt).

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>

i965: Add a new infrastructure for generating Broadwell shader assembly.

This replaces the brw_eu_emit.c layer for Broadwell.  It will be
used by both the vector and scalar shader backends.

v2: Port to use the C-based instruction representation.

v3: Fix destination register type for CMP.

v4: Pass brw to gen8_instruction functions (required by rebase).

v5: Remove bogus assertion on math instructions (caught by Piglit).

v6: Remove more restrictions on math instructions (caught by Eric).
    Make ADDC and SUBB helpers set accumulator writes, like MAC and
    MACH (caught by Matt).

v7: Don't implicitly force ALU3 operations to SIMD8 (we've been able
    to do SIMD16 versions since Haswell, but didn't when I originally
    wrote this code).

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>

i965: Implement a disassembler for Broadwell's new instruction encoding.

Heavily based on Keith Packard's existing brw_disasm.c code.  I've tried
to go through most of the pieces (like SFIDs) and update the lists to
include features added in recent generations.

v2: Port to use the C-based instruction emitters.  This allows us to use
    C99 array initializers, which tidies up some of the code.

v3: Improve decoding of render target write messages.

v4: Update for BRW_REGISTER_TYPE becoming an abstraction.

v5: Rebase on Chris Forbes' SFID message defines.

v6: Fix disassembly of UV immediates; remove silly casts.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>

i965: Add a new representation for Broadwell shader instructions.

Broadwell significantly changes the EU instruction encoding.  Many of
the fields got moved to different bit positions; some even got split
in two.

With so many changes, it was infeasible to continue using struct
brw_instruction.  We needed a new representation.

This new approach is a bit different: rather than a struct, I created a
class that has four DWords, and helper functions that read/write various
bits.  This has several advantages:

1. We can create several different names for the same bits.  For
   example, conditional modifiers, SFID for SEND instructions, and the
   MATH instruction's function opcode are all stored in bits 27:24.

   In each situation, we can use the appropriate setter function:
   set_sfid(), set_math_function(), or set_cond_modifier().  This
   is much easier to follow.

2. Since the fields are expressed using the original 128-bit numbers,
   the code to create the getter/setter functions follows the table in
   the documentation very closely.

To aid in debugging, I've enabled -fkeep-inline-functions when building
gen8_instruction.c.  Otherwise, these functions cannot be called by
gdb, making it insanely difficult to print out anything.

Kenneth Graunke wrote most of this code.  Damien Lespiau ported it to
C99.  Xiang Haihao added media fields.  Zhao Yakui added indirect
addressing support.  Eric Anholt added an assertion to make sure that
values fit in the alloted number of bits.

v2: Update for brw_reg_type_to_hw_type(), which necessitates passing
    brw_context pointers around everywhere.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Xiang, Haihao <haihao.xiang@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Matt Turner <mattst88@gmail.com>

i965: Add SFID #defines for media stuff.

While we probably won't ever use these, having them makes it easy to
share disassembler code between intel-gpu-tools and Mesa.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>

i965: Add #defines for new Broadwell math functions.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>

i965: add struct and SFID for pixel interpolator messages

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

i965/Gen7: Only emit cube face enables for cubes.

This is not observed to actually fix anything, but the PRM says this
field must be zero for other surface types.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

i965: Improve dumping of Gen7 SURFACE_STATE

Previously this was missing many interesting fields. Having them decoded
makes debugging views much easier.

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

i965: Add masks for more SURFACE_STATE fields

Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

nv50: drop obsolete check from error path

At 'out_err' the nv50_context has been calloc-ated.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

nv50: assert before trying to out-of-bounds access framebuffer.cbufs

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

nv50: assert before trying to out-of-bounds access samplers

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

nv50: assert before trying to out-of-bounds access textures

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

nv50: pass vtxbuf index as unsigned

The index passed to the function is already unsigned, and internally
we threat it as unsigned.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

nv50: assert before trying to out-of-bounds access vtxbuf

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

nv50: typecast the result of ffs() to unsigned

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

nv50: assert before trying to out-of-bounds access constbuf

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

nv50: access only the available amount of constbuf

The textures array is defined as a number of NV50_MAX_PIPE_CONSTBUFS
per shader stage. Currently the nv50 driver handles only 3 shader
stages, thus we wreck chaos when accessing array-out-of-bounds.

Cc: 9.1 9.2 10.0 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

nv50: access only the available amount of textures

The textures array is defined as a number of PIPE_MAX_SAMPLERS per shader stage.
Currently nv50 driver handles only 3 shader stages, thus we wreck chaos when
accessing array-out-of-bounds.

Fixes a segfault in piglit/bin/arb_texture_buffer_object-data-sync -fbo -auto

Cc: 9.1 9.2 10.0 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

loader: fallback to drmGetVersion() for non-pci devices

Use the kernel driver name are returned by drmGetVersion() for
non-pci(platform) devices.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
v2 (Emil): Rebased and weaked commit message.
Reviewed-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

pipe-loader: add support for non-pci (platform) devices

Culled out of the "loader: refactor duplicated code into loader util lib"
patch by Rob Clark.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>

pci_ids: no not include loader.h

As per original approach by Rob, each user of the loader lib should include
loader.h and the pci_id_driver_map.h header will be used exclusively by the
loader.

Add back the include guard __IS_LOADER and remove no longer needed include
folder in the scons build.

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>

egl_dri2: use loader util lib

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>

pipe-loader: use loader util lib

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>

st/egl: use loader util lib

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>

egl-static: use loader util lib

v2
* Drop the no longer used _EGL_NO_DRM from Android.mk.

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>

gbm: use the loader util lib

Additionally this commit removes the following exported functions

   _gbm_udev_device_new_from_fd()
   _gbm_fd_get_device_name()
   _gbm_log()

All three were erroneously marked as exported since their inception.
Neither of them has ever been a part of the API thus there should be
no users of them.

Cc: Chad Versace <chad.versace@linux.intel.com>
Cc: Kristian Høgsberg <krh@bitplanet.net>
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>

glx: use the loader util lib

v2
* Set logger to ErrorMessageF. Spotted by Kristian

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>

loader: introduce the loader util lib

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>

i965: Remove CACHED_BATCH support altogether.

Using an unoptimized variant of glamor spending 50% of its CPU time in
brw_draw_prims() (and hitting the cache *very* frequently):

    N           Min           Max        Median           Avg        Stddev
x 200         29200         40500         34900         34750     958.43256
+ 200         31000         40300         34700         34622     916.35941
No difference proven at 95.0% confidence

Similarly, no difference on GLB2.7:

    N           Min           Max        Median           Avg        Stddev
x  63          64.1         71.36         70.69     70.113175     1.6782026
+  63          63.6         71.18         70.75     70.223651     1.6044186
No difference proven at 95.0% confidence

v2: Rebase on master (by anholt)
v3: Add a missing BEGIN_BATCH(3) to aa_line_parameters -- CACHED_BATCH
    didn't have the asserts about batchbuffer usage that ADVANCE_BATCH
    does, so we started assertion failing.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>

i965: Replace 8-wide and 16-wide with SIMD8 and SIMD16.

Those are the terms used in the docs, and think "n-wide" was something I
just happened to say.  Note that shader-db needs updating for the
INTEL_DEBUG=fs parsing.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

i965: Stop doing our optimization on a copy of the GLSL IR.

The original intent was that we'd keep a driver-private copy, and there
would be the normal copy for swrast to make use of without the tuning (or
anything more invasive we might do) specific to i965.  Only, we don't
generate swrast code any more, because swrast can't render current shaders
anyway.  Thus, our private copy is rather a waste, and we can just do our
backend-specific operations on the linked shader.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

s/Tungsten Graphics/VMware/

Tungsten Graphics Inc. was acquired by VMware Inc. in 2008.  Leaving the
old copyright name is creating unnecessary confusion, hence this change.

This was the sed script I used:

    $ cat tg2vmw.sed
    # Run as:
    #
    #   git reset --hard HEAD && find include scons src -type f -not -name 'sed*' -print0 | xargs -0 sed -i -f tg2vmw.sed
    #

    # Rename copyrights
    s/Tungsten Gra\(ph\|hp\)ics,\? [iI]nc\.\?\(, Cedar Park\)\?\(, Austin\)\?\(, \(Texas\|TX\)\)\?\.\?/VMware, Inc./g
    /Copyright/s/Tungsten Graphics\(,\? [iI]nc\.\)\?\(, Cedar Park\)\?\(, Austin\)\?\(, \(Texas\|TX\)\)\?\.\?/VMware, Inc./
    s/TUNGSTEN GRAPHICS/VMWARE/g

    # Rename emails
    s/alanh@tungstengraphics.com/alanh@vmware.com/
    s/jens@tungstengraphics.com/jowen@vmware.com/g
    s/jrfonseca-at-tungstengraphics-dot-com/jfonseca-at-vmware-dot-com/
    s/jrfonseca\?@tungstengraphics.com/jfonseca@vmware.com/g
    s/keithw\?@tungstengraphics.com/keithw@vmware.com/g
    s/michel@tungstengraphics.com/daenzer@vmware.com/g
    s/thomas-at-tungstengraphics-dot-com/thellstom-at-vmware-dot-com/
    s/zack@tungstengraphics.com/zackr@vmware.com/

    # Remove dead links
    s@Tungsten Graphics (http://www.tungstengraphics.com)@Tungsten Graphics@g

    # C string src/gallium/state_trackers/vega/api_misc.c
    s/"Tungsten Graphics, Inc"/"VMware, Inc"/

Reviewed-by: Brian Paul <brianp@vmware.com>

trace: Re-license trace.xsl under MIT license.

I was the sole author, as Tungsten Graphics employee, which was since
then acquired by VMware Inc.

Reviewed-by: Brian Paul <brianp@vmware.com>

svga: fix crash when clearing null color buffer

Fixes regression since 9baa45f78b8ca7d66280e36009b6a685055d7cd6
but some of the piglit fbo-drawbuffers-none tests still don't
pass.

v2: use the right pointer type for 'h'

Reviewed-by: José Fonseca <jfonseca@vmware.com>

llvmpipe: handle NULL color buffer pointers

Fixes regression from 9baa45f78b8ca7d66280e36009b6a685055d7cd6

v2: incorporate a few small changes suggested by Roland.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>

softpipe: handle NULL color buffer pointers

Fixes regression from 9baa45f78b8ca7d66280e36009b6a685055d7cd6

Reviewed-by: Roland Scheidegger <sroland@vmware.com>

llvmpipe: fix large point rasterization with point_quad_rasterization

The whole round-pointsize-to-int stuff must only be done with GL legacy
rules (no point_quad_rasterization) or all the wrong edges are lit up.
This was previously in a private branch (d3d pointsprite test complains
loudly otherwise) and got lost in a merge. However, it should certainly
apply to GL point sprite rasterization as well.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>