[igt-dev] [PATCH i-g-t 2/2] tests/api_intel_bb: Add crc32 checking test for DG2

[Zbigniew Kempczyński]

Add simple test which compares crc32 sums and calculation times on cpu
and gpu.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
---
 tests/i915/api_intel_bb.c | 53 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/tests/i915/api_intel_bb.c b/tests/i915/api_intel_bb.c
index 92f44cecf4..9f1f49ea18 100644
--- a/tests/i915/api_intel_bb.c
+++ b/tests/i915/api_intel_bb.c
@@ -38,6 +38,7 @@
 #include <zlib.h>
 #include "intel_bufops.h"
 #include "i915/gem_vm.h"
+#include "i915/i915_crc.h"
 
 #define PAGE_SIZE 4096
 
@@ -1395,6 +1396,53 @@ static void render_ccs(struct buf_ops *bops)
 	igt_assert_f(fails == 0, "render-ccs fails: %d\n", fails);
 }
 
+static double elapsed(const struct timeval *start,
+		      const struct timeval *end)
+{
+	return (1e6*(end->tv_sec - start->tv_sec) + (end->tv_usec - start->tv_usec)) / 1e6;
+}
+
+static void test_crc32(int i915)
+{
+	const intel_ctx_t *ctx = intel_ctx_create_all_physical(i915);
+	uint64_t ahnd = get_reloc_ahnd(i915, ctx->id);
+	uint32_t data, *ptr;
+
+	for (int m = 0; m < 2; m++) {
+		uint32_t region = m ? REGION_LMEM(0) : REGION_SMEM;
+
+		igt_info("[region: %s]\n", region == REGION_SMEM ? "smem" : "lmem");
+		for (int i = 12; i < 22; i++) {
+			struct timeval start, end;
+			uint64_t size = 1 << i;
+			uint32_t cpu_crc, gpu_crc;
+
+			double cpu_time, gpu_time;
+
+			data = gem_create_in_memory_regions(i915, size, region);
+			ptr = gem_mmap__device_coherent(i915, data, 0, size, PROT_WRITE);
+			for (int j = 0; j < size / sizeof(*ptr); j++)
+				ptr[j] = j;
+
+			gettimeofday(&start, NULL);
+			cpu_crc = cpu_crc32(ptr, size);
+			gettimeofday(&end, NULL);
+			cpu_time = elapsed(&start, &end);
+
+			gettimeofday(&start, NULL);
+			gpu_crc = i915_crc32(i915, ahnd, ctx, data, size);
+			gettimeofday(&end, NULL);
+			gpu_time = elapsed(&start, &end);
+			igt_info("size: %10lld, cpu crc: 0x%08x (time: %.3f), "
+				 "gpu crc: 0x%08x (time: %.3f) [ %s ]\n",
+				 (long long) size, cpu_crc, cpu_time, gpu_crc, gpu_time,
+				 cpu_crc == gpu_crc ? "EQUAL" : "DIFFERENT");
+			munmap(ptr, size);
+			gem_close(i915, data);
+		}
+	}
+}
+
 static int opt_handler(int opt, int opt_index, void *data)
 {
 	switch (opt) {
@@ -1552,6 +1600,11 @@ igt_main_args("dpib", NULL, help_str, opt_handler, NULL)
 	igt_subtest("render-ccs")
 		render_ccs(bops);
 
+	igt_subtest("crc32") {
+		igt_require(supports_gpu_crc32(i915));
+		test_crc32(i915);
+	}
+
 	igt_fixture {
 		buf_ops_destroy(bops);
 		close(i915);
-- 
2.32.0