[Intel-gfx] [PATCH I-g-t V2 1/2] tests: Add one ring sync case based on multi drm_fd to test ring semaphore sync under multi BSD rings

[Zhao Yakui]

The Broadwell GT3 machine has two independent BSD rings in kernel driver while
it is transparent to the user-space driver. In such case it needs to check
the ring sync between the two BSD rings. At the same time it also needs to
check the sync among the second BSD ring and the other rings.

Signed-off-by: Zhao Yakui <yakui.zhao at intel.com>
---
 tests/Makefile.sources          |    1 +
 tests/gem_multi_bsd_sync_loop.c |  172 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 173 insertions(+)
 create mode 100644 tests/gem_multi_bsd_sync_loop.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index c957ace..7cd9ca8 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -105,6 +105,7 @@ TESTS_progs = \
 	gem_render_tiled_blits \
 	gem_ring_sync_copy \
 	gem_ring_sync_loop \
+	gem_multi_bsd_sync_loop \
 	gem_seqno_wrap \
 	gem_set_tiling_vs_gtt \
 	gem_set_tiling_vs_pwrite \
diff --git a/tests/gem_multi_bsd_sync_loop.c b/tests/gem_multi_bsd_sync_loop.c
new file mode 100644
index 0000000..7f5b832
--- /dev/null
+++ b/tests/gem_multi_bsd_sync_loop.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Daniel Vetter <daniel.vetter at ffwll.ch> (based on gem_ring_sync_loop_*.c)
+ *    Zhao Yakui <yakui.zhao at intel.com>
+ *
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include "drm.h"
+#include "ioctl_wrappers.h"
+#include "drmtest.h"
+#include "intel_bufmgr.h"
+#include "intel_batchbuffer.h"
+#include "intel_io.h"
+#include "i830_reg.h"
+#include "intel_chipset.h"
+
+static drm_intel_bufmgr *bufmgr;
+struct intel_batchbuffer *batch;
+static drm_intel_bo *target_buffer;
+
+#define NUM_FD	50
+
+static int mfd[NUM_FD];
+static drm_intel_bufmgr *mbufmgr[NUM_FD];
+static struct intel_batchbuffer *mbatch[NUM_FD];
+static drm_intel_bo *mbuffer[NUM_FD];
+
+
+/*
+ * Testcase: Basic check of ring<->ring sync using a dummy reloc
+ *
+ * Extremely efficient at catching missed irqs with semaphores=0 ...
+ */
+
+#define MI_COND_BATCH_BUFFER_END	(0x36<<23 | 1)
+#define MI_DO_COMPARE			(1<<21)
+
+static void
+store_dword_loop(int fd)
+{
+	int i;
+	int num_rings = gem_get_num_rings(fd);
+
+	srandom(0xdeadbeef);
+
+	for (i = 0; i < SLOW_QUICK(0x100000, 10); i++) {
+		int ring, mindex;
+		ring = random() % num_rings + 1;
+		mindex = random() % NUM_FD;
+		batch = mbatch[mindex];
+		if (ring == I915_EXEC_RENDER) {
+			BEGIN_BATCH(4);
+			OUT_BATCH(MI_COND_BATCH_BUFFER_END | MI_DO_COMPARE);
+			OUT_BATCH(0xffffffff); /* compare dword */
+			OUT_RELOC(mbuffer[mindex], I915_GEM_DOMAIN_RENDER,
+					I915_GEM_DOMAIN_RENDER, 0);
+			OUT_BATCH(MI_NOOP);
+			ADVANCE_BATCH();
+		} else {
+			BEGIN_BATCH(4);
+			OUT_BATCH(MI_FLUSH_DW | 1);
+			OUT_BATCH(0); /* reserved */
+			OUT_RELOC(mbuffer[mindex], I915_GEM_DOMAIN_RENDER,
+					I915_GEM_DOMAIN_RENDER, 0);
+			OUT_BATCH(MI_NOOP | (1<<22) | (0xf));
+			ADVANCE_BATCH();
+		}
+		intel_batchbuffer_flush_on_ring(batch, ring);
+	}
+
+	drm_intel_bo_map(target_buffer, 0);
+	// map to force waiting on rendering
+	drm_intel_bo_unmap(target_buffer);
+}
+
+igt_simple_main
+{
+	int fd;
+	int devid;
+	int i;
+
+	fd = drm_open_any();
+	devid = intel_get_drm_devid(fd);
+	gem_require_ring(fd, I915_EXEC_BLT);
+
+
+	bufmgr = drm_intel_bufmgr_gem_init(fd, 4096);
+	igt_assert(bufmgr);
+	drm_intel_bufmgr_gem_enable_reuse(bufmgr);
+
+
+	target_buffer = drm_intel_bo_alloc(bufmgr, "target bo", 4096, 4096);
+	igt_assert(target_buffer);
+
+	/* Create multiple drm_fd and map one gem_object among multi drm_fd */
+	{
+		unsigned int target_flink;
+		char buffer_name[32];
+		if (dri_bo_flink(target_buffer, &target_flink)) {
+			igt_assert(0);
+			printf("fail to get flink for target buffer\n");
+			goto fail_flink;
+		}
+		for (i = 0; i < NUM_FD; i++) {
+			mfd[i] = 0;
+			mbufmgr[i] = NULL;
+			mbuffer[i] = NULL;
+		}
+		for (i = 0; i < NUM_FD; i++) {
+			sprintf(buffer_name, "Target buffer %d\n", i);
+			mfd[i] = drm_open_any();
+			mbufmgr[i] = drm_intel_bufmgr_gem_init(mfd[i], 4096);
+			igt_assert(mbufmgr[i]);
+			drm_intel_bufmgr_gem_enable_reuse(mbufmgr[i]);
+			mbatch[i] = intel_batchbuffer_alloc(mbufmgr[i], devid);
+			igt_assert(mbufmgr[i]);
+			mbuffer[i] = intel_bo_gem_create_from_name(mbufmgr[i], buffer_name, target_flink);
+			igt_assert(mbuffer[i]);
+		}
+	}
+
+	store_dword_loop(fd);
+
+	{
+		for (i = 0; i < NUM_FD; i++) {
+			dri_bo_unreference(mbuffer[i]);
+			intel_batchbuffer_free(mbatch[i]);
+			drm_intel_bufmgr_destroy(mbufmgr[i]);
+			close(mfd[i]);
+		}
+	}
+	drm_intel_bo_unreference(target_buffer);
+	drm_intel_bufmgr_destroy(bufmgr);
+
+	close(fd);
+	return;
+
+fail_flink:
+	drm_intel_bo_unreference(target_buffer);
+	drm_intel_bufmgr_destroy(bufmgr);
+
+	close(fd);
+}
-- 
1.7.10.1