Mesa (main): iris: Set BindingTableEntryCount for compute shaders

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Module: Mesa
Branch: main
Commit: 62f0677223171819f04a288c8b17911aa6485b4a
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=62f0677223171819f04a288c8b17911aa6485b4a

Author: Jason Ekstrand <jason.ekstrand at collabora.com>
Date:   Tue Apr  5 16:42:55 2022 -0500

iris: Set BindingTableEntryCount for compute shaders

This may slightly increase perf somewhere because the hardware can now
pre-cache binding tables.  The real feature is that INTEL_DEBUG=bat now
dumps out surface states for compute.

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15759>

---

 src/gallium/drivers/iris/iris_state.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index 1c184d2f44b..7535c646c2a 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -4722,6 +4722,7 @@ iris_store_cs_state(const struct intel_device_info *devinfo,
       assert(cs_prog_data->push.cross_thread.regs == 0);
 #endif
       desc.BarrierEnable = cs_prog_data->uses_barrier;
+      desc.BindingTableEntryCount = MIN2(shader->bt.size_bytes / 4, 31);
 #if GFX_VER >= 12
       /* TODO: Check if we are missing workarounds and enable mid-thread
        * preemption.
@@ -7153,6 +7154,7 @@ iris_upload_compute_walker(struct iris_context *ice,
          .NumberOfBarriers = cs_prog_data->uses_barrier,
          .SamplerStatePointer = shs->sampler_table.offset,
          .BindingTablePointer = binder->bt_offset[MESA_SHADER_COMPUTE],
+         .BindingTableEntryCount = MIN2(shader->bt.size_bytes / 4, 31),
       };
 
       assert(brw_cs_push_const_total_size(cs_prog_data, dispatch.threads) == 0);