intel: Drop Gen11 WaBTPPrefetchDisable workaround

This isn't needed on production Icelake hardware.

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3250>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3250>

4 files changed, 10 insertions, 49 deletions

diff --git a/src/gallium/drivers/iris/iris_state.c b/src/gallium/drivers/iris/iris_state.c
index c4b7393419a..4fb36e7e680 100644
--- a/src/gallium/drivers/iris/iris_state.c
+++ b/src/gallium/drivers/iris/iris_state.c
@@ -4111,17 +4111,9 @@ KSP(const struct iris_compiled_shader *shader)
    return iris_bo_offset_from_base_address(res->bo) + shader->assembly.offset;
 }
 
-/* Gen11 workaround table #2056 WABTPPrefetchDisable suggests to disable
- * prefetching of binding tables in A0 and B0 steppings.  XXX: Revisit
- * this WA on C0 stepping.
- *
- * TODO: Fill out SamplerCount for prefetching?
- */
-
 #define INIT_THREAD_DISPATCH_FIELDS(pkt, prefix, stage)                   \
    pkt.KernelStartPointer = KSP(shader);                                  \
-   pkt.BindingTableEntryCount = GEN_GEN == 11 ? 0 :                       \
-      shader->bt.size_bytes / 4;                                          \
+   pkt.BindingTableEntryCount = shader->bt.size_bytes / 4;                \
    pkt.FloatingPointMode = prog_data->use_alt_mode;                       \
                                                                           \
    pkt.DispatchGRFStartRegisterForURBData =                               \
@@ -4288,9 +4280,7 @@ iris_store_fs_state(struct iris_context *ice,
 
    iris_pack_command(GENX(3DSTATE_PS), ps_state, ps) {
       ps.VectorMaskEnable = true;
-      // XXX: WABTPPrefetchDisable, see above, drop at C0
-      ps.BindingTableEntryCount = GEN_GEN == 11 ? 0 :
-         shader->bt.size_bytes / 4;
+      ps.BindingTableEntryCount = shader->bt.size_bytes / 4;
       ps.FloatingPointMode = prog_data->use_alt_mode;
       ps.MaximumNumberofThreadsPerPSD = 64 - (GEN_GEN == 8 ? 2 : 1);
 
diff --git a/src/intel/blorp/blorp_genX_exec.h b/src/intel/blorp/blorp_genX_exec.h
index 53ff4f9a74c..c1fc0892893 100644
--- a/src/intel/blorp/blorp_genX_exec.h
+++ b/src/intel/blorp/blorp_genX_exec.h
@@ -772,13 +772,6 @@ blorp_emit_ps_config(struct blorp_batch *batch,
          ps.BindingTableEntryCount = 1;
       }
 
-     /* Gen 11 workarounds table #2056 WABTPPrefetchDisable suggests to
-      * disable prefetching of binding tables on A0 and B0 steppings.
-      * TODO: Revisit this WA on C0 stepping.
-      */
-      if (GEN_GEN == 11)
-         ps.BindingTableEntryCount = 0;
-
       /* SAMPLER_STATE prefetching is broken on Gen11 - WA_1606682166 */
       if (GEN_GEN == 11)
          ps.SamplerCount = 0;
diff --git a/src/intel/vulkan/genX_pipeline.c b/src/intel/vulkan/genX_pipeline.c
index 6c7ed9d7f96..b0bb1838cf2 100644
--- a/src/intel/vulkan/genX_pipeline.c
+++ b/src/intel/vulkan/genX_pipeline.c
@@ -1516,11 +1516,7 @@ emit_3dstate_vs(struct anv_pipeline *pipeline)
        * programming 0xB000[30] to '1'.
        */
       vs.SamplerCount               = GEN_GEN == 11 ? 0 : get_sampler_count(vs_bin);
-     /* Gen 11 workarounds table #2056 WABTPPrefetchDisable suggests to
-      * disable prefetching of binding tables on A0 and B0 steppings.
-      * TODO: Revisit this WA on newer steppings.
-      */
-      vs.BindingTableEntryCount     = GEN_GEN == 11 ? 0 : get_binding_table_entry_count(vs_bin);
+      vs.BindingTableEntryCount     = get_binding_table_entry_count(vs_bin);
       vs.FloatingPointMode          = IEEE754;
       vs.IllegalOpcodeExceptionEnable = false;
       vs.SoftwareExceptionEnable    = false;
@@ -1592,8 +1588,7 @@ emit_3dstate_hs_te_ds(struct anv_pipeline *pipeline,
       hs.KernelStartPointer = tcs_bin->kernel.offset;
       /* WA_1606682166 */
       hs.SamplerCount = GEN_GEN == 11 ? 0 : get_sampler_count(tcs_bin);
-      /* Gen 11 workarounds table #2056 WABTPPrefetchDisable */
-      hs.BindingTableEntryCount = GEN_GEN == 11 ? 0 : get_binding_table_entry_count(tcs_bin);
+      hs.BindingTableEntryCount = get_binding_table_entry_count(tcs_bin);
       hs.MaximumNumberofThreads = devinfo->max_tcs_threads - 1;
       hs.IncludeVertexHandles = true;
       hs.InstanceCount = tcs_prog_data->instances - 1;
@@ -1648,8 +1643,7 @@ emit_3dstate_hs_te_ds(struct anv_pipeline *pipeline,
       ds.KernelStartPointer = tes_bin->kernel.offset;
       /* WA_1606682166 */
       ds.SamplerCount = GEN_GEN == 11 ? 0 : get_sampler_count(tes_bin);
-      /* Gen 11 workarounds table #2056 WABTPPrefetchDisable */
-      ds.BindingTableEntryCount = GEN_GEN == 11 ? 0 : get_binding_table_entry_count(tes_bin);
+      ds.BindingTableEntryCount = get_binding_table_entry_count(tes_bin);
       ds.MaximumNumberofThreads = devinfo->max_tes_threads - 1;
 
       ds.ComputeWCoordinateEnable =
@@ -1707,8 +1701,7 @@ emit_3dstate_gs(struct anv_pipeline *pipeline)
       gs.VectorMaskEnable        = false;
       /* WA_1606682166 */
       gs.SamplerCount            = GEN_GEN == 11 ? 0 : get_sampler_count(gs_bin);
-      /* Gen 11 workarounds table #2056 WABTPPrefetchDisable */
-      gs.BindingTableEntryCount  = GEN_GEN == 11 ? 0 : get_binding_table_entry_count(gs_bin);
+      gs.BindingTableEntryCount  = get_binding_table_entry_count(gs_bin);
       gs.IncludeVertexHandles    = gs_prog_data->base.include_vue_handles;
       gs.IncludePrimitiveID      = gs_prog_data->include_primitive_id;
 
@@ -1943,8 +1936,7 @@ emit_3dstate_ps(struct anv_pipeline *pipeline,
       ps.VectorMaskEnable           = GEN_GEN >= 8;
       /* WA_1606682166 */
       ps.SamplerCount               = GEN_GEN == 11 ? 0 : get_sampler_count(fs_bin);
-      /* Gen 11 workarounds table #2056 WABTPPrefetchDisable */
-      ps.BindingTableEntryCount     = GEN_GEN == 11 ? 0 : get_binding_table_entry_count(fs_bin);
+      ps.BindingTableEntryCount     = get_binding_table_entry_count(fs_bin);
       ps.PushConstantEnable         = wm_prog_data->base.nr_params > 0 ||
                                       wm_prog_data->base.ubo_ranges[0].length;
       ps.PositionXYOffsetSelect     = wm_prog_data->uses_pos_offset ?
@@ -2314,12 +2306,10 @@ compute_pipeline_create(
       .KernelStartPointer     = cs_bin->kernel.offset,
       /* WA_1606682166 */
       .SamplerCount           = GEN_GEN == 11 ? 0 : get_sampler_count(cs_bin),
-      /* Gen 11 workarounds table #2056 WABTPPrefetchDisable
-       *
-       * We add 1 because the CS indirect parameters buffer isn't accounted
+      /* We add 1 because the CS indirect parameters buffer isn't accounted
        * for in bind_map.surface_count.
        */
-      .BindingTableEntryCount = GEN_GEN == 11 ? 0 : 1 + MIN2(cs_bin->bind_map.surface_count, 30),
+      .BindingTableEntryCount = 1 + MIN2(cs_bin->bind_map.surface_count, 30),
       .BarrierEnable          = cs_prog_data->uses_barrier,
       .SharedLocalMemorySize  =
          encode_slm_size(GEN_GEN, cs_prog_data->base.total_shared),
diff --git a/src/mesa/drivers/dri/i965/genX_state_upload.c b/src/mesa/drivers/dri/i965/genX_state_upload.c
index 01f9d198104..d617b78dc63 100644
--- a/src/mesa/drivers/dri/i965/genX_state_upload.c
+++ b/src/mesa/drivers/dri/i965/genX_state_upload.c
@@ -2101,13 +2101,7 @@ static const struct brw_tracked_state genX(wm_state) = {
       GEN_GEN == 11 ?                                                     \
       0 :                                                                 \
       DIV_ROUND_UP(CLAMP(stage_state->sampler_count, 0, 16), 4);          \
-   /* Gen 11 workarounds table #2056 WABTPPrefetchDisable suggests to     \
-    * disable prefetching of binding tables in A0 and B0 steppings.       \
-    * TODO: Revisit this WA on C0 stepping.                               \
-    */                                                                    \
    pkt.BindingTableEntryCount =                                           \
-      GEN_GEN == 11 ?                                                     \
-      0 :                                                                 \
       stage_prog_data->binding_table.size_bytes / 4;                      \
    pkt.FloatingPointMode  = stage_prog_data->use_alt_mode;                \
                                                                           \
@@ -3877,13 +3871,7 @@ genX(upload_ps)(struct brw_context *brw)
          0 : DIV_ROUND_UP(CLAMP(stage_state->sampler_count, 0, 16), 4);
 
       /* BRW_NEW_FS_PROG_DATA */
-      /* Gen 11 workarounds table #2056 WABTPPrefetchDisable suggests to disable
-       * prefetching of binding tables in A0 and B0 steppings.
-       * TODO: Revisit this workaround on C0 stepping.
-       */
-      ps.BindingTableEntryCount = GEN_GEN == 11 ?
-                                  0 :
-                                  prog_data->base.binding_table.size_bytes / 4;
+      ps.BindingTableEntryCount = prog_data->base.binding_table.size_bytes / 4;
 
       if (prog_data->base.use_alt_mode)
          ps.FloatingPointMode = Alternate;