Identify if view_index is used only for position calculation, and use
Primitive Replication to implement Multiview in Gen12. This feature
allows storing per-view position information in a single execution of
the shader, treating position as an array.
The shader is transformed by adding a for-loop around it, that have an
iteration per active view (in the view_mask). Stores to the position
now store into the position array for the current index in the loop,
and load_view_index() will return the view index corresponding to the
current index in the loop.
The feature is controlled by setting the environment variable
ANV_PRIMITIVE_REPLICATION_MAX_VIEWS, which defaults to 2 if unset.
For pipelines with view counts larger than that, the regular
instancing will be used instead of Primitive Replication. To disable
it completely set the variable to 0.
v2: Don't assume position is set in vertex shader; remove only stores
for position; don't apply optimizations since other passes will
do; clone shader body without extract/reinsert; don't use
last_block (potentially stale). (Jason)
Fix view_index immediate to contain the view index, not its order.
Check for maximum number of views supported.
Add guard for gen12.
v3: Clone the entire shader function and change it before reinsert;
disable optimization when shader has memory writes. (Jason)
Use a single environment variable with _DEBUG on the name.
v4: Change to use new nir_deref_instr.
When removing stores, look for mode nir_var_shader_out instead
of the walking the list of outputs.
Ensure unused derefs are removed in the non-position part of the
shader.
Remove dead control flow when identifying if can use or not
primitive replication.
v5: Consider all the active shaders (including fragment) when deciding
that Primitive Replication can be used.
Change environment variable to ANV_PRIMITIVE_REPLICATION.
Squash the emission of 3DSTATE_PRIMITIVE_REPLICATION into this patch.
Disable Prim Rep in blorp_exec_3d.
v6: Use a loop around the shader, instead of manually unrolling, since
the regular unroll pass will kick in.
Document that we don't expect to see copy_deref or load_deref
involving the position variable.
Recover use_primitive_replication value when loading pipeline from
the cache.
Set VARYING_SLOT_LAYER to 0 in the shader. Earlier versions were
relying on ForceZeroRTAIndexEnable but that might not be
sufficient.
Disable Prim Rep in cmd_buffer_so_memcpy.
v7: Don't use Primitive Replication if position is not set, fallback
to instancing; change environment variable to be
ANV_PRIMITVE_REPLICATION_MAX_VIEWS and default it to 2 based on
experiments.
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2313>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2313>
Change brw_compute_vue_map() to also take the number of pos slots. If
more than one slot is used, the VARYING_SLOT_POS is treated as an
array.
When using Primitive Replication, instead of a single position, the
VUE must contain an array of positions. Padding might be
necessary (after clip distance) to ensure rest of attributes start
aligned.
v2: Add note about array in the commit message and assert that
pos_slots >= 1 to make clear 0 is invalid. (Jason)
Move padding to be after the clip distance.
v3: Apply the correct offset when gathering the sources from outputs.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net> [v2]
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2313>
Let's make it clear what includes are being added everywhere, so that
they can be cleaned up.
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4360>
Stencil CCS is slightly different from color CCS. Using a color CCS
resolve with stencil CCS doesn't do the right thing and you can't sample
from a stencil CCS image without the DepthStencilResource bit set or you
will get the wrong data. Stencil CCS also has it's own rules such as it
doesn't support fast-clear and has no partial resolve. This seems to
indicate that it should probably be its own isl_aux_usage. Now that
adding new isl_aux_usage values is pretty cheap, let's split stencil CCS
out on its own.
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4056>
Previously, we always set the aux_usage to ISL_AUX_USAGE_HIZ_CCS and let
ISL choose write-through based on isl_surf_supports_hiz_ccs_wt. This
commit makes us choose explicitly at surface creation time whether to
use HIZ_CCS or HIZ_CCS_WT based on the same set of conditions. This is
more explicit and should be more robust as it lets us choose WT mode in
one place rather than trusting isl_surf_supports_hiz_ccs_wt to return
the same thing every time.
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4056>
On Gen4 and G45 and earlier, we have to handle weird offsetting to write
to depth and stencil due to a lack of proper depth mipmapping support in
hardware. On Gen6, we have to deal with strange HiZ and stencil
layouts. Prior to Gen9, we also had to do crazy things for stencil
writes because we didn't support GL_ARB_shader_stencil_export and
friends in hardware. However, starting with Gen7 for depth and Gen9 for
stencil, we can easily write out with the "right" hardware. This allows
us to leave HiZ and other compression enabled for blorp_blit() and
blorp_copy() operations.
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/3717>
Previously, i965/iris tried to reuse the currently programmed URB config
if it was good enough for BLORP, rather than reprogramming it each time.
However, this will make some things harder on Gen12+ and we've not seen
any performance impact from emitting URB more frequently in ANV.
This makes the blorp <-> driver interface a bit simpler on Gen7+ because
now all the driver has to do is to provide the L3$ config rather than
trying to hand off URB re-config to blorp.
Cc: "20.0" mesa-stable@lists.freedesktop.org
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3454>
According to the BSpec, this should prevent hangs when using shaders
with large URB entries. A more precise fix can be done but it requires
re-arranging URB setup.
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3454>
In f132e0fddf, I attempted to allow BLORP to do CCS_E copies by using
the UNORM formats instead. However, the old BLORP bit-cast code could
only handle RGBA formats and asserted on anything other than UINT
formats. The reason we didn't catch this is because it only comes up on
Gen12 platforms which aren't in our normal CI yet.
Fixes: f132e0fddf "intel/blorp: Add support for CCS_E copies with..."
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3593>
Some of the smaller bit-size formats which support CCS_E don't have a
UINT representative in their compression class. However, we should be
able to use UNORM just fine and still get bit-exact copies. We just
have to do a conversion to/from UNORM when we bitcast.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3554>
When copying to an RGB surface, we treat it as an R only one of three
times the width, which may end up being larger than the maximum size
supported by the hardware and so it hits the shrink path. This forced
both source and destination surfaces to be shrunk, even though it's not
necessary for the former, and may even hit some assertions in some
cases, such as the surface being compressed.
Fixes several tests under dEQP-VK.api.copy_and_blit.core.image_to_image.dimensions.*
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3422>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3422>
The shader code required to do this is int(sat(x) * UINT24_MAX) which
isn't really worth all the effort to avoid. Doing the format
conversion, on the other hand, prevents us from sampling with HiZ which
is something that we very much want on gen8-9 where we can.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
In blorp, all the push constants are disabled, so we only need to emit a
single 3DSTATE_CONSTANT_ALL with the bitmask for stage update
appropriately set.
v2: Update comment (Caio).
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
The automatically generated padding in structs contains
undefined values, force pack the structs to eliminate the
padding. Otherwise structs with the same values may generate
different hashes.
Valgrind output:
Conditional jump or move depends on uninitialised value(s)
util_fast_urem32 (fast_urem_by_const.h:71)
hash_table_search (hash_table.c:262)
_mesa_hash_table_search (hash_table.c:296)
anv_pipeline_cache_search_locked (anv_pipeline_cache.c:318)
anv_pipeline_cache_search (anv_pipeline_cache.c:335)
lookup_blorp_shader (anv_blorp.c:38)
blorp_params_get_mcs_partial_resolve_kernel (blorp_clear.c:1112)
blorp_mcs_partial_resolve (blorp_clear.c:1205)
anv_image_mcs_op (anv_blorp.c:1742)
anv_cmd_predicated_mcs_resolve (genX_cmd_buffer.c:774)
transition_color_buffer (genX_cmd_buffer.c:1159)
cmd_buffer_end_subpass (genX_cmd_buffer.c:4840)
Uninitialised value was created by a stack allocation
blorp_params_get_mcs_partial_resolve_kernel (blorp_clear.c:1103)
Signed-off-by: Danylo Piliaiev <danylo.piliaiev@globallogic.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
This reverts commit 4432a2d14d.
Pretty much every SKQP test dies with this assertion:
skqp: ../src/mesa/drivers/dri/i965/brw_program_cache.c:102: hash_key: Assertion `item->key_size % 4 == 0' failed.
The automatically generated padding in structs contains
undefined values, force pack the structs to eliminate the
padding. Otherwise structs with the same values may generate
different hashes.
Valgrind output:
Conditional jump or move depends on uninitialised value(s)
util_fast_urem32 (fast_urem_by_const.h:71)
hash_table_search (hash_table.c:262)
_mesa_hash_table_search (hash_table.c:296)
anv_pipeline_cache_search_locked (anv_pipeline_cache.c:318)
anv_pipeline_cache_search (anv_pipeline_cache.c:335)
lookup_blorp_shader (anv_blorp.c:38)
blorp_params_get_mcs_partial_resolve_kernel (blorp_clear.c:1112)
blorp_mcs_partial_resolve (blorp_clear.c:1205)
anv_image_mcs_op (anv_blorp.c:1742)
anv_cmd_predicated_mcs_resolve (genX_cmd_buffer.c:774)
transition_color_buffer (genX_cmd_buffer.c:1159)
cmd_buffer_end_subpass (genX_cmd_buffer.c:4840)
Uninitialised value was created by a stack allocation
blorp_params_get_mcs_partial_resolve_kernel (blorp_clear.c:1103)
Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Danylo Piliaiev <danylo.piliaiev@globallogic.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
On Gen12+, Stencil buffer's lossless compression should be resolved
with WM_HZ_OP packet.
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
We never saw any failures regarding this typo but it's good to assign
correct stencil view while constructing blorp_params.
Fixes: 0cabf93b80 "intel/blorp: Add an entrypoint for clearing depth and stencil"
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Depending on MCS_CSS or MCS we can emit blorp blit shaders.
As we support MCS_CSS and MCS, it makes sense to use
isl_aux_usage_has_mcs function.
v2: Fix commit message (Nanley Chery)
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Store the converted depth value into two dwords. Avoids regressing the
piglit test "fbo-depth-array depth-clear", when HIZ_CCS sampling is
enabled in a later commit.
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Prevent the piglit test,
amd_vertex_shader_layer-layered-depth-texture-render, from regressing in
in a future commit.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Prepare this function to be used in iris and to handle new Gen12 behavior.
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
We'll start doing slow depth clears more often on HIZ_CCS buffers in a
future commit. Reduce the performance impact by making them use less
bandwidth.
From the Depth Test section of the BSpec:
This function is enabled by the Depth Test Enable state variable. If
enabled, the pixel's ("source") depth value is first computed. After
computation the pixel's depth value is clamped to the range defined
by Minimum Depth and Maximum Depth in the selected CC_VIEWPORT state.
Then the current ("destination") depth buffer value for this pixel is
read.
and from the Depth Buffer Updates section of the BSpec:
If depth testing is disabled or the depth test passed, the incoming
pixel's depth value is written to the Depth Buffer.
Taken together, it's clear that depth testing isn't necessary to perform
a depth buffer clear. Mark Janes and I analyzed this patch with
frameretrace and a depthrange piglit test. I disabled HiZ to ensure we'd
get slow depth clears. We've observed the bandwidth consumption by the
depth buffer access to be cut ~50% on BDW and SKL during depth clears.
On a more graphically intensive workload, the Shadowmapping Sascha
benchmark, I took the average of 3 runs on a BDW with a display
resolution of about 1920x1200 (minus some desktop environment
decorations). I measured a 22.61% FPS improvement when HiZ is disabled.
v2. The BSpec doesn't mandate this behavior, update comment accordingly.
(Ken)
Fixes: bc4bb5a7e3 ("intel/blorp: Emit more complete DEPTH_STENCIL state")
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
In ISL:
Update the format table to add CCS_E support for some 8BPP formats,
some 16BPP formats, and R10G10B10A2_UNORM_SRGB.
In the helper for determining CCS_E support, we return false for some
16BPP formats because they aren't properly handled in blorp_copy().
In BLORP:
Allow the new and non-problematic formats for CCS_E-enabled copies.
v2. Update other fields for A1B5G5R5_UNORM and A4B4G4R4_UNORM in table.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> (v1)
This isn't accurate enough for HiZ which can have a discontiguous range
of supported aux slices. This also won't work with the plan to represent
Gen12 CCS as a single slice surface.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Update their dimensions according to the Bspec.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
From "Render Target Fast Clear" description for Gen12:
"SW must store clear color using MI_STORE_DATA_IMM with
ForceWriteCompletionCheck bit set."
From Instruction_MI_STORE_DATA_IMM, bitfield 10 (when set to 1):
"Following the last write from this command, Command Streamer
will wait for all previous writes are completed and in global
observable domain before moving to next command."
We use 4 SDIs to store the clear color (one per channel). From the
description, it looks to me that setting that flag only on the last SDI
should be enough.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reworks:
* Fill out the format's entry in the ISL format table. (Nanley)
* Support CCS_E-enabled BLORP copies with the format. (Nanley)
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
In the case where the stencil clear is nicely aligned, we can clear
stencil much more efficiently by mapping it as a wide format (say
RGBA32_UINT) and blasting out the stencil clear value with a repclear.
On Unigine Heaven, this makes one stencil clear go from non-trivial to
unnoticeable when looking at per-draw timings.
In order for this change to work properly, ANV needs to do a bit more
flushing around depth and stencil clears. i965 and iris already have
the cache tracking logic to handle this so no changes are required
there.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
