panvk: Handle IUBs in decoder

When we encode inline uniform data into the descriptor table, we should
skip the descriptors that are actually data instead of real descriptors.
Let's do that and also print the inlined data for convenience.

Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35831>

src/panfrost/genxml/decode.c

@@ -563,6 +563,37 @@ GENX(pandecode_shader)(struct pandecode_context *ctx, uint64_t addr,
    return desc.binary;
 }
 
+static unsigned
+pandecode_buffer(struct pandecode_context *ctx,
+                 const struct mali_buffer_packed *cl, uint64_t addr)
+{
+   pan_unpack(cl, BUFFER, buffer)
+      ;
+   DUMP_UNPACKED(ctx, BUFFER, buffer, "Buffer @%" PRIx64 ":\n", addr);
+
+   /* If the address is the following descriptor, this descriptor is an IUB. */
+   if (buffer.address == (addr + 0x20)) {
+      assert((buffer.size % 0x20) == 0);
+
+      const uint8_t *cl_bytes = (uint8_t *)cl;
+      const uint32_t *words = (uint32_t *)(cl_bytes + 0x20);
+      unsigned count = buffer.size / (2 * sizeof(uint32_t));
+
+      ctx->indent++;
+      pandecode_log(ctx, "IUB @%" PRIx64 ":\n", buffer.address);
+      ctx->indent++;
+      for (unsigned i = 0; i < count; ++i)
+         pandecode_log(ctx, "%08X %08X\n", words[2 * i], words[2 * i + 1]);
+      ctx->indent--;
+      ctx->indent--;
+      pandecode_log(ctx, "\n");
+
+      return buffer.size;
+   }
+
+   return 0;
+}
+
 static void
 pandecode_resources(struct pandecode_context *ctx, uint64_t addr, unsigned size)
 {
@@ -589,7 +620,8 @@ pandecode_resources(struct pandecode_context *ctx, uint64_t addr, unsigned size)
          DUMP_CL(ctx, ATTRIBUTE, cl + i, "Attribute @%" PRIx64 ":\n", addr + i);
          break;
       case MALI_DESCRIPTOR_TYPE_BUFFER:
-         DUMP_CL(ctx, BUFFER, cl + i, "Buffer @%" PRIx64 ":\n", addr + i);
+         i += pandecode_buffer(ctx, (const struct mali_buffer_packed *)&cl[i],
+                               addr + i);
          break;
       default:
          fprintf(ctx->dump_stream, "Unknown descriptor type %X\n", header.type);