Mesa (main): intel/decode: add gfx4 constant buffer decode

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Module: Mesa
Branch: main
Commit: 0dec873f2a6f6107de4f5ffc47d337e8a5f2c842
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0dec873f2a6f6107de4f5ffc47d337e8a5f2c842

Author: Dave Airlie <airlied at redhat.com>
Date:   Wed Jul 28 05:52:48 2021 +1000

intel/decode: add gfx4 constant buffer decode

Acked-by: Jason Ekstrand <jason at jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12160>

---

 src/intel/common/intel_batch_decoder.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/src/intel/common/intel_batch_decoder.c b/src/intel/common/intel_batch_decoder.c
index 709e3c2374f..23e3715fe22 100644
--- a/src/intel/common/intel_batch_decoder.c
+++ b/src/intel/common/intel_batch_decoder.c
@@ -761,6 +761,39 @@ decode_3dstate_constant(struct intel_batch_decode_ctx *ctx, const uint32_t *p)
    }
 }
 
+static void
+decode_gfx4_constant_buffer(struct intel_batch_decode_ctx *ctx, const uint32_t *p)
+{
+   struct intel_group *inst = intel_ctx_find_instruction(ctx, p);
+   uint64_t read_length = 0, read_addr = 0, valid = 0;
+   struct intel_field_iterator iter;
+   intel_field_iterator_init(&iter, inst, p, 0, false);
+
+   while (intel_field_iterator_next(&iter)) {
+      if (!strcmp(iter.name, "Buffer Length")) {
+         read_length = iter.raw_value;
+      } else if (!strcmp(iter.name, "Valid")) {
+         valid = iter.raw_value;
+      } else if (!strcmp(iter.name, "Buffer Starting Address")) {
+         read_addr = iter.raw_value;
+      }
+   }
+
+   if (!valid)
+      return;
+
+   struct intel_batch_decode_bo buffer = ctx_get_bo(ctx, true, read_addr);
+   if (!buffer.map) {
+      fprintf(ctx->fp, "constant buffer unavailable\n");
+      return;
+   }
+   unsigned size = (read_length + 1) * 16 * sizeof(float);
+   fprintf(ctx->fp, "constant buffer size %u\n", size);
+
+   ctx_print_buffer(ctx, buffer, size, 0, -1);
+}
+
+
 static void
 decode_gfx4_3dstate_binding_table_pointers(struct intel_batch_decode_ctx *ctx,
                                            const uint32_t *p)
@@ -1223,6 +1256,7 @@ struct custom_decoder {
    { "MI_LOAD_REGISTER_IMM", decode_load_register_imm },
    { "3DSTATE_PIPELINED_POINTERS", decode_pipelined_pointers },
    { "3DSTATE_CPS_POINTERS", decode_cps_pointers },
+   { "CONSTANT_BUFFER", decode_gfx4_constant_buffer },
 };
 
 void