turnip: Fix vkCmdCopyQueryPoolResults with available flag

Previously, calling vkCmdCopyQueryPoolResults with the
VK_QUERY_RESULT_WITH_AVAILABILITY_BIT flag set the query result
field in the buffer to 0 if unavailable and the query result if
available. This was a misunderstanding of the Vulkan spec, and this
commit corrects the behavior to emitting a separate available
result in addition to the query result.

Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3560>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3560>

turnip: Fix vkGetQueryPoolResults with available flag

Previously, calling vkGetQueryPoolResults with the
VK_QUERY_RESULT_WITH_AVAILABILITY_BIT flag set the query result
field in *pData to 0 if unavailable and the query result if
available. This was a misunderstanding of the Vulkan spec, and this
commit corrects the behavior to eriting a separate available result
in addition to the query result.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3560>

turnip: Free event->bo on vkDestroyEvent

Fixes a leak from freeing event but not event->bo.

Reviewed-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3639>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3639>

loader: Fix leak of kernel driver name

This is strdup'd, it needs to be freed.

CID: 1458032
Fixes: f93bb2fb102 ("loader: Check if the kernel driver is i915 before loading iris")
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3630>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3630>

docs: Update SWR tessellation support

Update features.txt to reflect ARB_tessellation_shader
support in SWR

Reviewed-by: Krzysztof Raszkowski <krzysztof.raszkowski@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3636>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3636>

i965: Use brw_batch_references in tex_busy check

If the batch references the buffer, we will have to flush the batch
immediately before mapping it, at which point it will be busy.

(This bug has existed for a long time...even going back to BLT-era...)

Fixes: 779923194c6 ("i965/tex_image: Use meta for instead of the blitter PBO TexImage and GetTexImage")
Fixes: d5d4ba9139a ("i965/tex_subimage: use meta instead of the blitter for PBO TexSubImage")
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3616>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3616>

etnaviv: drm-shim: add GC400

These are the ETNAVIV_PARAM's returned from a GC400 found on a
STM32MP157C-DK2 Discovery Board running mainline kernel.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3195>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3195>

lima: add noheap debug option

Disable using heap buffer when set.

Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3264>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3264>

lima: create heap buffer with new interface if available

Newly added heap buffer create interface can create a
large enough buffer whose backup memory can increase
dynamically as needed.

Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Tested-by: Andreas Baierl <ichgeh@imkreisrum.de>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3264>

lima: sync lima_drm.h with kernel

Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Tested-by: Andreas Baierl <ichgeh@imkreisrum.de>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3264>

lima: fix lima_set_vertex_buffers()

When setting the vertex buffers, lima calls
util_set_vertex_buffers_mask() to reference and copy buffers. That
function
function adds dst with start_slot internally, so lima should not offset
the destination address again.

This is discovered when comparing with other drivers, and fixed by
removing the extra offset in lima_set_vertex_buffers().

This fixes draws that get translated in u_vbuf, because u_vbuf adds
extra vertex buffers when translating.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Andreas Baierl <ichgeh@imkreisrum.de>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3620>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3620>

turnip: hook up cmdbuffer event set/wait

Gets some basic tests under "dEQP-VK.synchronization.*event*" passing

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3123>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3123>

etnaviv: drop default state for PE_STENCIL_CONFIG_EXT2

It gets emitted when needed.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3631>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3631>

docs: add new features for RADV/ACO.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3627>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3627>

radv: refactor physical device properties

Based on ANV. This removes a bunch of duplicated code for properties.

Fixes: 1b8d99e2885 ("radv: bump conformance version to 1.2.0.0")
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3626>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3626>

freedreno: remove flush-queue

Signed-off-by: Rob Clark <robdclark@chromium.org>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno: add gmem_lock

The gmem state is split out now, so it does not require synchronization.
But gmem rendering still accesses vsc state from the context.

TODO maybe there is a better way?  For gen's that don't do vsc resizing,
this is probably easier.. but for a6xx there isn't really a great
position for more fine grained locking.  Maybe it doesn't matter since
in practice the lock shouldn't be contended.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno: add gmem state cache

Which also has the benefit of getting rid of fd_context::gmem.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno: get GMEM state from batch

Prep work to reduce churn in next patch.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno/a2xx: constify gmem state

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno/a3xx: constify gmem state

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno/a4xx: constify gmem state

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno/a5xx: constify gmem state

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno/a6xx: constify gmem state

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno: constify fd_vsc_pipe

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno: constify fd_tile

In a following patch, when we cache the gmem state, we will want to
treat the gmem state as immuatable.  So start converting things to
const to make this more clear.. fd_tile is a good place to start.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno: consolidate GMEM state

The tile and vsc_pipe arrays are really part of the GMEM configuration.
So pull these out of fd_context and into fd_gmem_stateobj.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

freedreno: extract vsc pipe bo from GMEM state

Prep work for reorganizing GMEM state and extracting out of fd_context.
The vsc pipe bo was the one thing that doesn't change with GMEM/tile
config.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3503>

turnip: remove unused descriptor state dirty

It was only used to be initialized to zero. Not even updated as
descriptor sets are bind.

As far as I understand, setting the bit TU_CMD_DIRTY_DESCRIPTOR_SET on
tu_cmd_state.dirty is used instead.

Reviewed-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3624>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3624>

aco: Fix the meaning of is_atomic.

Previously, is_atomic really meant "is not atomic", contrary to its name.
This commit fixes it to mean what one would think it means.

Fixes: 69bed1c9186c3e24ad54089218d58c5f7b83befe

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3618>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3618>

iris: Support multiple chained batches.

There was never much point in artificially limiting chaining to two
batches - we can trivially support arbitrary length chains.

Currently, we should only ever have 1 or 2, but this may change.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3613>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3613>

iris: Make iris_emit_default_l3_config pull devinfo from the batch

No need to pass it, we can just use batch->screen->devinfo.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3613>

iris: Drop 'engine' from iris_batch.

For the moment, everything is I915_EXEC_RENDER, so this isn't necessary.
But even should that change, I don't think we want to handle multiple
engines in this manner.

Nowadays, we have batch->name (IRIS_BATCH_RENDER, IRIS_BATCH_COMPUTE,
possibly an IRIS_BATCH_BLIT for blorp batches someday), which describes
the functional usage of the batch.  We can simply check that and select
an engine for that class of work (assuming there ever is more than one).

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3613>

tu: Fix binning address setup after pack macros change.

This fixes a regression in "vkcube -m headless" rendering, but upsettingly
none of my CTS tests I've been using.

Fixes: 59f29fc845ce ("turnip: Convert the rest of tu_cmd_buffer.c over to the new pack macros.")
Caught-by: Jonathan Marek <jonathan@marek.ca>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3609>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3609>

turnip: Enable occlusionQueryPrecise

This commit enables the occlusionQueryPrecise feature. No additonal
work is required as occlusion queries are already implemented to
track exact sample counts.

Also enables a number of extra tests on the Vulkan CTS.

Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3605>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3605>

aco: simplify gathering of MIMG address components

This patch has a slight effect on pipelinedb:
Totals from affected shaders:
SGPRS: 23616 -> 21504 (-8.94 %)
VGPRS: 15088 -> 14444 (-4.27 %)
Spilled SGPRs: 0 -> 0 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 662660 -> 664600 (0.29 %) bytes
LDS: 49 -> 49 (0.00 %) blocks
Max Waves: 3079 -> 3204 (4.06 %)

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3602>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3602>

aco: simplify adjust_sample_index_using_fmask() & get_image_coords()

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3602>

aco: fix register allocation with multiple live-range splits

This patch fixes register allocation if multiple live-range splits
occur to the same variable within one instruction.

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3602>

aco: reorder VMEM operands in ACO IR

For all VMEM instructions, the resource constant is now
in operands[0]. For MIMG instructions, the sampler shares
operands[1] with write data in case this instruction writes memory.
Moving the VADDR to be the last operand for MIMG is the first step to
support Navi NSA encoding.

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3602>

nir: Make nir_deref_path_init skip trivial casts

In a NIR generated using SPIR-V initializers to variables, copy
propagation can end up transforming

    vec1 32 ssa_33 = deref_var &@1 (shared mat2x4)
    vec1 32 ssa_35 = mov ssa_33
    vec1 32 ssa_7 = deref_cast (mat2x4 *)ssa_35 (shared mat2x4)  /* ptr_stride=0 */

into

    vec1 32 ssa_33 = deref_var &@1 (shared mat2x4)
    vec1 32 ssa_7 = deref_cast (mat2x4 *)ssa_33 (shared mat2x4)  /* ptr_stride=0 */

Before the optimization, the "head" of a path of deref that uses ssa_7
will be the cast.  After, it will be the variable in ssa_33.  Since
the types are the same, this is a trivial cast that would be picked up
by nir_opt_deref.

If we need to compare such deref-chain after optimization with another
deref-chain for the same variable, the compare function will get
confused by the cast in the middle.

One alternative would be to add nir_opt_deref to places that compare
derefs, but that might not scale well, so skip the trivial casts when
generating the paths instead.

Motivated by the discussion in
https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3047#note_383660.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3420>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3420>

aco: fix exec mask consistency issues

There seems to be more, these are just the ones found in
Detroit: Become Human shaders.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: parallelcopy exec mask before s_wqm

It can be used later and we want any uses to not be fixed to exec, so it's
definition can't be fixed to exec because of how exec masks interact with
register demand calculation.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: fill reg_demand with sensible information in add_coupling_code()

process_block() will use this to determine the register demand of the
before the current instruction. Previously, it was filled with zeroes
which could result in process_block() only using the register demand
of after the current instruction.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: improve assertion at the end of spiller

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: set exec_potentially_empty after continues/breaks in nested IFs

Fixes: 93c8ebfa ('aco: Initial commit of independent AMD compiler')
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: error when block has no logical preds but VGPRs are live at the start

This would have caught the liveness error fixed in the previous commit.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: don't always add logical edges from continue_break blocks to headers

Otherwise, code like this will be broken:
loop {
   if (...) {
      break;
   } else {
      break;
   }
}
The continue_or_break block doesn't have any logical predecessors but it's
a logical predecessor of the header block. This liveness error breaks the
spiller in init_live_in_vars() (under "keep variables spilled on all
incoming paths") and eventually creates garbage reloads.

Fixes: 93c8ebfa ('aco: Initial commit of independent AMD compiler')
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: only create parallelcopy to restore exec at loop exit if needed

The operand isn't fixed to exec, which can mess up the spiller. This also
adds a new situation where a phi is needed.

Fixes dEQP-VK.ssbo.layout.random.descriptor_indexing.2 and an assertion
when compiling a Detroit: Become Human shader.

Fixes: 93c8ebfa ('aco: Initial commit of independent AMD compiler')
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: don't update demand in add_coupling_code() for loop headers

We don't need to update it since it won't be used later.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: don't consider loop header blocks branch blocks in add_coupling_code

Loops without continues create header blocks with only 1 predecessor.

CC: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

aco: fix target calculation when vgpr spilling introduces sgpr spilling

A shader might require vgpr spilling but not require sgpr spilling. In
that case, the spiller lowers the sgpr target by 5 which could mean sgpr
spilling is then required. Then the vgpr target has to be lowered to make
space for the linear vgprs. Previously, space wasn't make for the linear
vgprs.

Found while testing the spiller on the pipeline-db with a lowered limit

Fixes: a7ff1bb5b9a78cf57073b5e2e136daf0c85078d6
   ('aco: simplify calculation of target register pressure when spilling')

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3257>

radv/gfx10: re-enable NGG GS

Now that NGG GS queries are implemented, it should be safe enough
to enable NGG GS by default. It can be disabled with RADV_DEBUG=nongg
if necessary.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3380>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3380>

radv/gfx10: implement NGG GS queries

The number of generated primitives is only counted by the hardware
if GS uses the legacy path. For NGG GS, we need to accumulate that
value in the NGG GS itself. To achieve that, we use a plain GDS
atomic operation.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3380>

radv/gfx10: add a separate flag for creating a GDS OA buffer

For implementing NGG GS queries, we decided to use GDS but GDS OA
is only required for NGG streamout.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3380>

winsys/amdgpu: Close KMS handles for other DRM file descriptions

When a BO or amdgpu_screen_winsys is destroyed.

Should fix leaking such BOs in other DRM file descriptions.

v2:
* Pass the correct file descriptor to drmIoctl (Pierre-Eric
  Pelloux-Prayer)
* Use _mesa_hash_table_remove
v3:
* Close handles in amdgpu_winsys_unref as well
v4:
* Adapt to amdgpu_winsys::sws_list_lock.

Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/2270
Fixes: 11a3679e3aba "winsys/amdgpu: Make KMS handles valid for original
                     DRM file descriptor"

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3582>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3582>

winsys/amdgpu: Re-use amdgpu_screen_winsys when possible

Namely, if os_same_file_description determined that the DRM file
descriptor references the same file description.

v2:
* Adapt to amdgpu_winsys::sws_list_lock.
v3:
* Fix comparison of amdgpu_screen_winsys file descriptions, see
  https://gitlab.freedesktop.org/mesa/mesa/issues/2413 .
* Lock amdgpu_winsys::sws_list_lock for traversing the sws_list in
  amdgpu_winsys_create.

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3582>

anv: Rename a variable

The name "desc" shadows another variable.  Name it "desc_data" like all
of the other descriptor data variables in this file.

anv/block_pool: Ensure allocations have contiguous maps

Because softpin block pools are made up of a set of BOs with different
maps, it was possible for a single state to end up straddling blocks.
To fix this, we pass a contiguous size to anv_block_pool_grow and it
ensures that the next allocation in the pool will have at least that
size.

We also add an assert in anv_block_pool_map to ensure we always get
contiguous maps.  Prior to the changes to anv_block_pool_grow, the unit
tests failed with this assert.  With this patch, the tests pass.

This was causing problems on Gen12 where we allocate the pages for the
AUX table from the dynamic state pool.  The first chunk, which gets
allocated very early in the pool's history, is 1MB which was enough that
it was getting multiple BOs.  This caused the gen_aux_map code to write
outside of the map and overwrite the instruction state pool buffer which
lead to GPU hangs.

Fixes: 731c4adcf9b "anv/allocator: Add support for non-userptr"
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

anv: Re-use one old BT block in reset_batch_bo_chain

We intentionally throw away all but one BT block but then we set
cmd_buffer->bt_block to ANV_STATE_NULL instead of the one we hung on to.
This causes the command buffer to immediately re-emit STATE_BASE_ADDRESS
the first time a BT is needed for no good reason.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

anv: Set actual state pool sizes when we have softpin

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

nir/algebraic: add some half packing optimizations

pipeline-db (ACO):
Totals from affected shaders:
SGPRS: 29200 -> 29200 (0.00 %)
VGPRS: 17372 -> 17372 (0.00 %)
Spilled SGPRs: 105 -> 105 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 1406576 -> 1389256 (-1.23 %) bytes
LDS: 83 -> 83 (0.00 %) blocks
Max Waves: 3976 -> 3976 (0.00 %)

pipeline-db (LLVM):
Totals from affected shaders:
SGPRS: 21320 -> 21320 (0.00 %)
VGPRS: 17056 -> 17036 (-0.12 %)
Spilled SGPRs: 22 -> 22 (0.00 %)
Spilled VGPRs: 503 -> 487 (-3.18 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 396 -> 396 (0.00 %) dwords per thread
Code Size: 1441244 -> 1423292 (-1.25 %) bytes
LDS: 463 -> 463 (0.00 %) blocks
Max Waves: 3609 -> 3611 (0.06 %)

v2: add pattern for ishr

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2271>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2271>

nir/algebraic: add patterns for a >> #b << #b

Fixes compilation of a Battlefront 2 shader with ACO by removing VGPR
spilling. The reassociation makes it worse on LLVM though.

pipeline-db (ACO):
Totals from affected shaders:
SGPRS: 10704 -> 10688 (-0.15 %)
VGPRS: 18736 -> 18528 (-1.11 %)
Spilled SGPRs: 70 -> 70 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 909696 -> 885796 (-2.63 %) bytes
LDS: 225 -> 225 (0.00 %) blocks
Max Waves: 1115 -> 1129 (1.26 %)

pipeline-db (LLVM):
Totals from affected shaders:
SGPRS: 8472 -> 8424 (-0.57 %)
VGPRS: 14284 -> 14368 (0.59 %)
Spilled SGPRs: 0 -> 0 (0.00 %)
Spilled VGPRs: 442 -> 503 (13.80 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 268 -> 396 (47.76 %) dwords per thread
Code Size: 862568 -> 853028 (-1.11 %) bytes
LDS: 0 -> 0 (0.00 %) blocks
Max Waves: 971 -> 964 (-0.72 %)

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/2271>

aco: fix VS input loads with MUBUF on GFX6

Only MTBUF supports vec3.

Fixes: 03a0d39366d ("aco: use MUBUF in some situations instead of splitting vertex fetches")
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3615>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3615>

aco: run p_wqm instructions in WQM

If the p_wqm ends up creating copies, these need to be in WQM. Helps (but
doesn't completely fix) artifacts in Strange Brigade. The actual issue
still exists and is harder to fix.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Fixes: 93c8ebfa780 ('aco: Initial commit of independent AMD compiler')
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3273>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3273>

aco: ensure predecessors' p_logical_end is in WQM when a p_phi is in WQM

We want any copies to be in WQM. I don't know if this fixes any real
application, but I can create a vkrunner test than reproduces the issue.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Fixes: 93c8ebfa780 ('aco: Initial commit of independent AMD compiler')
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3273>

pan/midgard: Fix a liveness info leak

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3566>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3566>

etnaviv: implement UBOs

At the same time, use pre-HALTI2 to use address register for indirect
uniform loads, since integers/LOAD instruction isn't always available.

Passes all dEQP-GLES3.functional.ubo.* on GC7000L. GC3000 with an extra
flush hack passes most of them, but still fails on some of the cases with
many loads.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3389>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3389>

freedreno/a6xx: convert blend state to stateobj

And move to new register builders while we are at it.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3565>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3565>

freedreno/a6xx: remove special handling based on MRT format

Logicop in particular is supposed to work for integer formats.. but
maybe this situation doesn't happen in gles.  The only thing that isn't
required for integer formats is blending.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3565>

mesa/st: random whitespace cleanup

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3565>

freedreno: use PIPE_CAP_RGB_OVERRIDE_DST_ALPHA_BLEND

This lets us drop a bunch of special handling for xRGB blend.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3565>

gallium/util: Increase the debug_flush map depth

Some piglit tests trigger a map depth assert when debug_flush is active.
Fix this by increasing the map depth from 16 to 32.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3614>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3614>

svga: Avoid discard DMA uploads

Newer versions of the device code will make discard DMA uploads
sub-optimal. Disable them for guest-backed aware code, where we previously
had them conditionally enabled.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3614>

winsys/svga: Enable transhuge pages for buffer objects

If the kernel supports it, enable transhuge pages for graphics buffer
objects. Except for the syscall itself, this is never expected to cause
any negative performance implications.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3614>

winsys/svga: use new ioctl for logging

Use the new ioctl for logging (rather than duplicating what the kernel
is doing). This way it's also independent from the actual guest/host
mechanism to do the logging.

Signed-off-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3614>

radv: remove the non conformant VK implementation warning on GFX10

It's no longer true.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3597>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3597>

radv: bump conformance version to 1.2.0.0

https://www.khronos.org/conformance/adopters/conformant-products#submission_472
https://www.khronos.org/conformance/adopters/conformant-products#submission_473
https://www.khronos.org/conformance/adopters/conformant-products#submission_474

Fixes dEQP-VK.api.driver_properties.conformance_version.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3597>

radv: implement VK_AMD_shader_explicit_vertex_parameter

Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/2402
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

radv: gather which input PS variables use an explicit interpolation mode

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

aco: implement VK_AMD_shader_explicit_vertex_parameter

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

ac/llvm: implement VK_AMD_shader_explicit_vertex_parameter

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

spirv: implement SPV_AMD_shader_explicit_vertex_parameter

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

nir: lower interp_deref_at_vertex to load_input_vertex

This introduces a new NIR intrinsic for loading inputs at a specific
vertex index.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

nir: add nir_intrinsic_interp_deref_at_vertex

From the SPV_AMD_shader_explicit_vertex_parameter extension:
   "Returns the value of the input <interpolant> without any
    interpolation, i.e. the raw output value of previous shader
    stage."

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

nir: lower SYSTEM_VALUE_BARYCENTRIC_* to nir_load_barycentric()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

nir: add nir_intrinsic_load_barycentric_model

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

spirv: add support for SpvBuiltInBaryCoord*

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

compiler: add new SYSTEM_VALUE_BARYCENTRIC_*

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

compiler: add PERSP to the existing barycentric system values

We need the LINEAR versions for AMD_shader_explicit_vertex_parameter.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

spirv: add support for SpvDecorationExplicitInterpAMD

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

compiler: add a new explicit interpolation mode

This introduces one more interpolation mode INTERP_MODE_EXPLICIT,
which is needed for AMD_shader_explicit_vertex_parameter.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3578>

turnip: Fix issues in tu_compute_pipeline_create() that may lead to crash

The shader object is destroyed even if its creation failed. It is also
not destroyed if its compilation or upload fails, leading to leaks.

Finally, tu_compute_pipeline_create() should set output var
pPipeline to VK_NULL_HANDLE if it fails.

Avoids crash on
dEQP-VK.api.object_management.alloc_callback_fail_multiple.compute_pipeline

Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3572>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3572>

turnip: Remove failed command buffer from pool

When an error condition occurs during tu_create_cmd_buffer(), the
cmd buffer has already been added to a pool, so the cleanup code should
remove it.

Fixes a crash (assert in tu_device::tu_bo_finish()) in dEQP tests:

dEQP-VK.api.object_management.max_concurrent.command_buffer_primary
dEQP-VK.api.object_management.max_concurrent.command_buffer_secondary

due to pool attempting to destroy an invalid command buffer.

Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3572>

radeonsi: stop using the VM_ALWAYS_VALID flag

Allocation all the bo as ALWAYS_VALID means they must all fit in memory
(vram + gtt) at each command submission.
This causes some trouble when the total allocated memory is greater than
the available memory.

Possible solutions:
- being able to tag/untag a bo as ALWAYS_VALID: would require kernel changes
- disable VM_ALWAYS_VALID when memory usage is more than a percentage of the
  available memory
- disable VM_ALWAYS_VALID entirely

v1 of this patch implemented option 2. v2 (this version) implements option 3.

Related issues:
 - https://gitlab.freedesktop.org/drm/amd/issues/607
 - https://gitlab.freedesktop.org/mesa/mesa/issues/1257

It also helps with some piglit tests (-t maxsize -t "max[_-].*size" -t maxuniformblocksize):
instead of crashing the machine, the tests fail cleanly.

Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/2190
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3430>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3430>

radv: enable VK_AMD_shader_fragment_mask on GFX6-GFX7

Works fine.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3603>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3603>

loader: Check if the kernel driver is i915 before loading iris

To prevent it from trying to load on say gma500 hardware.

Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3595>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3595>

anv: Emit CS Stall before Instruction Cache flush for gen12 WA

Before flushing the instruction cache with a pipe control, we need to
use a CS Stall pipe control.

Ref: GEN:BUG:1409226450
Rework: Add stall-at-scoreboard (Lionel)
Rework: Merge with other anvil pre-invalidate stalls (Lionel)
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3457>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3457>

iris: Emit CS Stall before Instruction Cache flush for gen12 WA

Before flushing the instruction cache with a pipe control, we need to
use a CS Stall pipe control.

Ref: GEN:BUG:1409226450
Rework: Add stall-at-scoreboard (Lionel)
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3457>

zink: set compareEnable when setting compareOp

We need to enable compareEnable for compareOp to be valid, and ANV was
recently updated to respect this. So let's update Zink to match.

This fixes the shadow-variants of several piglit regressions, like these:
spec@arb_shader_texture_lod@execution@tex-miplevel-selection
spec@glsl-1.20@execution@tex-miplevel-selection

Fixes: a19cdf989b1 ("anv: only use VkSamplerCreateInfo::compareOp if enabled")
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3473>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3473>

ci: Enable -Werror on the meson-i386 build.

I find warnings to be very disruptive to my workflow (using emacs's "go to
next error" feature), and I periodically have to go clean up other
people's drivers to get back to finding my own warnings in the noise.  I
know I'm not the only one doing something like this.

We don't want to enable -Werror by default in builds, since it means that
end users will have builds spuriously fail based on what compiler version
and opt flags they have compared to what the devs are using.  However, it
is quite easy to have CI ensure that we at least don't introduce warnings
on the compiler version that it uses.

For now I've just enabled it on meson-i386 to cover a bunch of Mesa core
and get us started on ratcheting up warnings-cleanliness in the tree,
without me having to fix up all the drivers at once.

Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3539>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3539>