[Intel-gfx] [PATCH 1/2] aubdump: Fix GTT setup for Gen8+.

[Francisco Jerez]

Gen8+ have 64 bit GTT entries, so we need to allocate twice as much
space for the GTT table in order to cover the same number of GTT
pages.  Fixes sporadic page-fault crashes on the simulator.
---
 tools/aubdump.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/tools/aubdump.c b/tools/aubdump.c
index 30dc742..d0774c1 100644
--- a/tools/aubdump.c
+++ b/tools/aubdump.c
@@ -54,7 +54,6 @@ static char *filename;
 static FILE *file;
 static int gen = 0;
 static int verbose = 0;
-static const uint32_t gtt_size = 0x10000;
 static bool device_override;
 static uint32_t device;
 
@@ -149,9 +148,18 @@ data_out(const void *data, size_t size)
 	fwrite(data, 1, size, file);
 }
 
+static uint32_t
+gtt_size(void)
+{
+	/* Enough for 64MB assuming 4kB pages. */
+	const unsigned entries = 0x4000;
+	return entries * (gen >= 8 ? 8 : 4);
+}
+
 static void
 write_header(void)
 {
+	const unsigned gtt_entry_size = gen >= 8 ? 8 : 4;
 	uint32_t entry = 0x200003;
 
 	/* Start with a (required) version packet. */
@@ -171,11 +179,14 @@ write_header(void)
 		  AUB_TRACE_TYPE_NOTYPE | AUB_TRACE_OP_DATA_WRITE);
 	dword_out(0); /* subtype */
 	dword_out(0); /* offset */
-	dword_out(gtt_size); /* size */
+	dword_out(gtt_size()); /* size */
 	if (gen >= 8)
 		dword_out(0);
-	for (uint32_t i = 0; i < gtt_size; i += 4, entry += 0x1000)
-		dword_out(entry);
+	for (uint32_t i = 0; i * gtt_entry_size < gtt_size(); i++) {
+		dword_out(entry + 0x1000 * i);
+		if (gen >= 8)
+			dword_out(0);
+	}
 }
 
 /**
@@ -332,7 +343,7 @@ dump_execbuffer2(int fd, struct drm_i915_gem_execbuffer2 *execbuffer2)
 	struct drm_i915_gem_exec_object2 *exec_objects =
 		(struct drm_i915_gem_exec_object2 *) (uintptr_t) execbuffer2->buffers_ptr;
 	uint32_t ring_flag = execbuffer2->flags & I915_EXEC_RING_MASK;
-	uint32_t offset = gtt_size;
+	uint32_t offset = gtt_size();
 	struct drm_i915_gem_exec_object2 *obj;
 	struct bo *bo, *batch_bo;
 	void *data;
-- 
2.10.1