tests: Introduce i915 directory

We can already move all the tests with distinct prefixes: gem_, gen3_
and i915_.

pm_ and drv_ tests will follow in batches, so we can do the
adjustments in the reporting/filtering layer of the CI system.

v2: Fix test-list.txt generation with meson
v3: Fix docs build (Petri)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Petri Latvala <petri.latvala@intel.com>
Cc: Martin Peres <martin.peres@linux.intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
Tested-by: Petri Latvala <petri.latvala@intel.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 189 insertions, 0 deletions

diff --git a/tests/i915/gem_fenced_exec_thrash.c b/tests/i915/gem_fenced_exec_thrash.c
new file mode 100644
index 00000000..7248d310
--- /dev/null
+++ b/tests/i915/gem_fenced_exec_thrash.c
@@ -0,0 +1,189 @@
+/*
+ * Copyright © 2011 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:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+#include <errno.h>
+
+#include "igt.h"
+
+IGT_TEST_DESCRIPTION("Test execbuf fence accounting.");
+
+#define WIDTH 1024
+#define HEIGHT 1024
+#define OBJECT_SIZE (4*WIDTH*HEIGHT)
+
+#define BATCH_SIZE 4096
+
+#define MAX_FENCES 64
+
+/*
+ * Testcase: execbuf fence accounting
+ *
+ * We had a bug where we were falsely accounting upon reservation already
+ * fenced buffers as occupying a fence register even if they did not require
+ * one for the batch.
+ *
+ * We aim to exercise this by performing a sequence of fenced BLT
+ * with 2*num_avail_fence buffers, but alternating which half are fenced in
+ * each command.
+ */
+
+static uint32_t
+tiled_bo_create (int fd)
+{
+	uint32_t handle;
+
+	handle = gem_create(fd, OBJECT_SIZE);
+
+	gem_set_tiling(fd, handle, I915_TILING_X, WIDTH*4);
+
+	return handle;
+}
+
+static uint32_t
+batch_create (int fd)
+{
+	uint32_t buf[] = { MI_BATCH_BUFFER_END, 0 };
+	uint32_t batch_handle;
+
+	batch_handle = gem_create(fd, BATCH_SIZE);
+
+	gem_write(fd, batch_handle, 0, buf, sizeof(buf));
+
+	return batch_handle;
+}
+
+static void fill_reloc(struct drm_i915_gem_relocation_entry *reloc, uint32_t handle)
+{
+	reloc->offset = 2 * sizeof(uint32_t);
+	reloc->target_handle = handle;
+	reloc->read_domains = I915_GEM_DOMAIN_RENDER;
+	reloc->write_domain = 0;
+}
+
+#define BUSY_LOAD (1 << 0)
+#define INTERRUPTIBLE (1 << 1)
+
+static void run_test(int fd, int num_fences, int expected_errno,
+		     unsigned flags)
+{
+	struct drm_i915_gem_execbuffer2 execbuf[2];
+	struct drm_i915_gem_exec_object2 exec[2][2*MAX_FENCES+1];
+	struct drm_i915_gem_relocation_entry reloc[2*MAX_FENCES];
+
+	unsigned long count;
+	int i, n;
+
+	igt_assert(2*num_fences+1 <= ARRAY_SIZE(exec[0]));
+	igt_assert(2*num_fences <= ARRAY_SIZE(reloc));
+
+	memset(execbuf, 0, sizeof(execbuf));
+	memset(exec, 0, sizeof(exec));
+	memset(reloc, 0, sizeof(reloc));
+
+	for (n = 0; n < 2*num_fences; n++) {
+		uint32_t handle = tiled_bo_create(fd);
+		exec[1][2*num_fences - n-1].handle = exec[0][n].handle = handle;
+		fill_reloc(&reloc[n], handle);
+	}
+
+	for (i = 0; i < 2; i++) {
+		for (n = 0; n < num_fences; n++)
+			exec[i][n].flags = EXEC_OBJECT_NEEDS_FENCE;
+
+		exec[i][2*num_fences].handle = batch_create(fd);
+		exec[i][2*num_fences].relocs_ptr = to_user_pointer(reloc);
+		exec[i][2*num_fences].relocation_count = 2*num_fences;
+
+		execbuf[i].buffers_ptr = to_user_pointer(exec[i]);
+		execbuf[i].buffer_count = 2*num_fences+1;
+		execbuf[i].batch_len = 2*sizeof(uint32_t);
+	}
+
+	count = 0;
+	igt_until_timeout(2) {
+		for (i = 0; i < 2; i++) {
+			igt_spin_t *spin = NULL;
+
+			if (flags & BUSY_LOAD)
+				spin = __igt_spin_batch_new(fd);
+
+			igt_while_interruptible(flags & INTERRUPTIBLE) {
+				igt_assert_eq(__gem_execbuf(fd, &execbuf[i]),
+					      -expected_errno);
+			}
+
+			igt_spin_batch_free(fd, spin);
+			gem_quiescent_gpu(fd);
+		}
+		count++;
+	}
+	igt_info("Completed %lu cycles\n", count);
+
+	/* Cleanup */
+	for (n = 0; n < 2*num_fences; n++)
+		gem_close(fd, exec[0][n].handle);
+
+	for (i = 0; i < 2; i++)
+		gem_close(fd, exec[i][2*num_fences].handle);
+}
+
+igt_main
+{
+	uint32_t devid = 0;
+	unsigned int num_fences = 0;
+	int fd = -1;
+
+	igt_skip_on_simulation();
+
+	igt_fixture {
+		fd = drm_open_driver(DRIVER_INTEL);
+		igt_require_gem(fd);
+
+		num_fences = gem_available_fences(fd);
+		igt_assert(num_fences > 4);
+		igt_assert(num_fences <= MAX_FENCES);
+
+		devid = intel_get_drm_devid(fd);
+	}
+
+	igt_subtest("2-spare-fences")
+		run_test(fd, num_fences - 2, 0, 0);
+	for (unsigned flags = 0; flags < 4; flags++) {
+		igt_subtest_f("no-spare-fences%s%s",
+			      flags & BUSY_LOAD ? "-busy" : "",
+			      flags & INTERRUPTIBLE ? "-interruptible" : "")
+			run_test(fd, num_fences, 0, flags);
+	}
+	igt_subtest("too-many-fences")
+		run_test(fd, num_fences + 1, intel_gen(devid) >= 4 ? 0 : EDEADLK, 0);
+
+	igt_fixture
+		close(fd);
+}