igt/gem_request_retire: Provoke context destruction with active VMAs

Test designed to trigger the
WARN_ON(!list_empty(&ppgtt->base.active_list))
in i915_gem_context_clean.

v2:
Simplify execbuf building and the test itself. Cleanup code. (Chris Wilson)

v3:
Removed asserts done by the helpers already. (Chris Wilson)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>

tests/.gitignore

@@ -91,6 +91,7 @@ gem_render_copy
 gem_render_copy_redux
 gem_render_linear_blits
 gem_render_tiled_blits
+gem_request_retire
 gem_reset_stats
 gem_ring_sync_copy
 gem_ring_sync_loop

tests/Makefile.sources

@@ -53,6 +53,7 @@ TESTS_progs_M = \
 	gem_reloc_overflow \
 	gem_reloc_vs_gpu \
 	gem_render_copy_redux \
+	gem_request_retire \
 	gem_reset_stats \
 	gem_ringfill \
 	gem_set_tiling_vs_blt \

tests/gem_request_retire.c

@@ -0,0 +1,233 @@
+/*
+ * Copyright © 2015 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:
+ *    Tvrtko Ursulin <tvrtko.ursulin@intel.com>
+ *
+ */
+
+/** @file gem_request_retire
+ *
+ * Collection of tests targeting request retirement code paths.
+ */
+
+#include "igt.h"
+#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 <sys/mman.h>
+#include <signal.h>
+#include <pthread.h>
+#include <time.h>
+
+#include "drm.h"
+#include "i915_drm.h"
+
+#include "intel_bufmgr.h"
+
+#define WIDTH 4096
+#define HEIGHT 4096
+#define BO_SIZE (WIDTH * HEIGHT * sizeof(uint32_t))
+
+static uint32_t
+blit(int fd, uint32_t dst, uint32_t src, uint32_t ctx_id)
+{
+	const unsigned int copies = 1000;
+	uint32_t batch[12 * copies + 5];
+	struct drm_i915_gem_relocation_entry reloc[2 * copies];
+	struct drm_i915_gem_exec_object2 obj[3];
+	struct drm_i915_gem_execbuffer2 exec;
+	uint32_t handle;
+	unsigned int i = 0, j, r = 0;
+
+	for (j = 0; j < copies; j++) {
+		reloc[r].target_handle = dst;
+		reloc[r].delta = 0;
+		reloc[r].offset = (i + 4) * sizeof(uint32_t);
+		reloc[r].presumed_offset = 0;
+		reloc[r].read_domains = I915_GEM_DOMAIN_RENDER;
+		reloc[r].write_domain = I915_GEM_DOMAIN_RENDER;
+
+		r++;
+
+		reloc[r].target_handle = src;
+		reloc[r].delta = 0;
+		reloc[r].offset = (i + 7) * sizeof(uint32_t);
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			reloc[r].offset += sizeof(uint32_t);
+		reloc[r].presumed_offset = 0;
+		reloc[r].read_domains = I915_GEM_DOMAIN_RENDER;
+		reloc[r].write_domain = 0;
+
+		r++;
+
+		batch[i++] = XY_SRC_COPY_BLT_CMD |
+			XY_SRC_COPY_BLT_WRITE_ALPHA |
+			XY_SRC_COPY_BLT_WRITE_RGB;
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			batch[i - 1] |= 8;
+		else
+			batch[i - 1] |= 6;
+
+		batch[i++] = (3 << 24) | /* 32 bits */
+			(0xcc << 16) | /* copy ROP */
+			WIDTH*4;
+		batch[i++] = 0; /* dst x1,y1 */
+		batch[i++] = (HEIGHT << 16) | WIDTH; /* dst x2,y2 */
+		batch[i++] = 0; /* dst reloc */
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			batch[i++] = 0;
+		batch[i++] = 0; /* src x1,y1 */
+		batch[i++] = WIDTH*4;
+		batch[i++] = 0; /* src reloc */
+		if (intel_gen(intel_get_drm_devid(fd)) >= 8)
+			batch[i++] = 0;
+	}
+
+	batch[i++] = MI_BATCH_BUFFER_END;
+
+	while (i % 4)
+		batch[i++] = MI_NOOP;
+
+	handle = gem_create(fd, sizeof(batch));
+	gem_write(fd, handle, 0, batch, sizeof(batch));
+
+	memset(obj, 0, sizeof(obj));
+	memset(&exec, 0, sizeof(exec));
+
+	obj[exec.buffer_count++].handle = dst;
+	if (src != dst)
+		obj[exec.buffer_count++].handle = src;
+	obj[exec.buffer_count].handle = handle;
+	obj[exec.buffer_count].relocation_count = 2 * copies;
+	obj[exec.buffer_count].relocs_ptr = (uintptr_t)reloc;
+	exec.buffer_count++;
+	exec.buffers_ptr = (uintptr_t)obj;
+
+	exec.batch_len = i * sizeof(uint32_t);
+	exec.flags = I915_EXEC_BLT;
+	i915_execbuffer2_set_context_id(exec, ctx_id);
+
+	gem_execbuf(fd, &exec);
+
+	return handle;
+}
+
+static uint32_t
+noop(int fd, uint32_t src, uint32_t ctx_id)
+{
+	uint32_t batch[4];
+	struct drm_i915_gem_exec_object2 obj[2];
+	struct drm_i915_gem_execbuffer2 exec;
+	uint32_t handle;
+	unsigned int i = 0;
+
+	batch[i++] = MI_NOOP;
+	batch[i++] = MI_BATCH_BUFFER_END;
+	batch[i++] = MI_NOOP;
+	batch[i++] = MI_NOOP;
+
+	handle = gem_create(fd, 4096);
+	gem_write(fd, handle, 0, batch, sizeof(batch));
+
+	memset(obj, 0, sizeof(obj));
+	memset(&exec, 0, sizeof(exec));
+
+	obj[exec.buffer_count++].handle = src;
+	obj[exec.buffer_count].handle = handle;
+	obj[exec.buffer_count].relocation_count = 0;
+	obj[exec.buffer_count].relocs_ptr = (uintptr_t)0;
+	exec.buffer_count++;
+	exec.buffers_ptr = (uintptr_t)obj;
+
+	exec.batch_len = i * sizeof(uint32_t);
+	exec.flags = I915_EXEC_RENDER;
+	i915_execbuffer2_set_context_id(exec, ctx_id);
+
+	gem_execbuf(fd, &exec);
+
+	return handle;
+}
+
+/*
+ * A single bo is operated from batchbuffers submitted from two contexts and on
+ * different rings.
+ * One execbuf finishes way ahead of the other at which point the respective
+ * context is destroyed.
+ */
+static void
+test_retire_vma_not_inactive(int fd)
+{
+	uint32_t ctx_id;
+	uint32_t src, dst;
+	uint32_t blit_bb, noop_bb;
+
+	igt_require(HAS_BLT_RING(intel_get_drm_devid(fd)));
+
+	ctx_id = gem_context_create(fd);
+
+	/* Create some bos batch buffers will operate on. */
+	src = gem_create(fd, BO_SIZE);
+	dst = gem_create(fd, BO_SIZE);
+
+	/* Submit a long running batch. */
+	blit_bb = blit(fd, dst, src, 0);
+
+	/* Submit a quick batch referencing the same object. */
+	noop_bb = noop(fd, src, ctx_id);
+
+	/* Wait for the quick batch to complete. */
+	gem_sync(fd, noop_bb);
+	gem_close(fd, noop_bb);
+
+	/* Now destroy the context in which the quick batch was submitted. */
+	gem_context_destroy(fd, ctx_id);
+
+	/* Wait for the slow batch to finish and clean up. */
+	gem_sync(fd, blit_bb);
+	gem_close(fd, blit_bb);
+
+	gem_close(fd, src);
+	gem_close(fd, dst);
+}
+
+int fd;
+
+int main(int argc, char **argv)
+{
+	igt_subtest_init(argc, argv);
+
+	igt_fixture {
+		fd = drm_open_driver(DRIVER_INTEL);
+		igt_assert(fd >= 0);
+	}
+
+	igt_subtest("retire-vma-not-inactive")
+		test_retire_vma_not_inactive(fd);
+
+	igt_exit();
+}