[PATCH 4/6] tools/null_state_gen: Add macro to emit commands with null state

[Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>]

In null/golden context there are multiple state commands where
the actual state is always zero. For more compact batch representation
add a macro which just emits command and the rest of the state as zero.

v2: - Be more verbose about length bias (Bradley Volkin)
    - strip out unrelated state_offset declaration (Bradley Volkin)

Cc: Volkin, Bradley D <bradley.d.volkin@xxxxxxxxx>
Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
---
 tools/null_state_gen/intel_batchbuffer.c | 15 +++++++++++++++
 tools/null_state_gen/intel_batchbuffer.h |  7 +++++++
 2 files changed, 22 insertions(+)

diff --git a/tools/null_state_gen/intel_batchbuffer.c b/tools/null_state_gen/intel_batchbuffer.c
index 2a0b340..a31ea38 100644
--- a/tools/null_state_gen/intel_batchbuffer.c
+++ b/tools/null_state_gen/intel_batchbuffer.c
@@ -274,3 +274,18 @@ const char *intel_batch_type_as_str(const struct bb_item *item)
 
 	return "UNKNOWN";
 }
+
+void intel_batch_cmd_emit_null(struct intel_batchbuffer *batch,
+			       const int cmd, const int len, const int len_bias,
+			       const char *str)
+{
+	int i;
+
+	assert(len > 1);
+	assert((len - len_bias) >= 0);
+
+	bb_area_emit(batch->cmds, (cmd | (len - len_bias)), CMD, str);
+
+	for (i = len_bias-1; i < len; i++)
+		OUT_BATCH(0);
+}
diff --git a/tools/null_state_gen/intel_batchbuffer.h b/tools/null_state_gen/intel_batchbuffer.h
index f10831c..f85f31d 100644
--- a/tools/null_state_gen/intel_batchbuffer.h
+++ b/tools/null_state_gen/intel_batchbuffer.h
@@ -69,6 +69,9 @@ struct intel_batchbuffer {
 
 struct intel_batchbuffer *intel_batchbuffer_create(void);
 
+#define OUT_CMD_B(cmd, len, bias) intel_batch_cmd_emit_null(batch, (cmd), (len), (bias), #cmd " " #len)
+#define OUT_CMD(cmd, len) OUT_CMD_B(cmd, len, 2)
+
 #define OUT_BATCH(d) bb_area_emit(batch->cmds, d, CMD, #d)
 #define OUT_BATCH_STATE_OFFSET(d) bb_area_emit(batch->cmds, d, STATE_OFFSET, #d)
 #define OUT_RELOC(batch, read_domain, write_domain, d) bb_area_emit(batch->cmds, d, RELOC, #d)
@@ -94,4 +97,8 @@ const char *intel_batch_type_as_str(const struct bb_item *item);
 void bb_area_emit(struct bb_area *a, uint32_t dword, item_type type, const char *str);
 void bb_area_emit_offset(struct bb_area *a, unsigned i, uint32_t dword, item_type type, const char *str);
 
+void intel_batch_cmd_emit_null(struct intel_batchbuffer *batch,
+			       const int cmd,
+			       const int len, const int len_bias,
+			       const char *str);
 #endif
-- 
1.9.1

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