[PATCH i-g-t 22/25] i915: Add gem_ctx_engines

[Chris Wilson <chris@chris-wilson.co.uk>]

To exercise the new I915_CONTEXT_PARAM_ENGINES and interactions with
gem_execbuf().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Andi Shyti <andi@etezian.org>
---
 tests/Makefile.sources       |   1 +
 tests/i915/gem_ctx_engines.c | 441 +++++++++++++++++++++++++++++++++++
 tests/meson.build            |   1 +
 3 files changed, 443 insertions(+)
 create mode 100644 tests/i915/gem_ctx_engines.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 7e06c969f..2f5612b07 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -22,6 +22,7 @@ TESTS_progs = \
 	drm_mm \
 	drm_read \
 	i915/gem_ctx_clone \
+	i915/gem_ctx_engines \
 	i915/gem_ctx_shared \
 	i915/gem_vm_create \
 	kms_3d \
diff --git a/tests/i915/gem_ctx_engines.c b/tests/i915/gem_ctx_engines.c
new file mode 100644
index 000000000..588ecf196
--- /dev/null
+++ b/tests/i915/gem_ctx_engines.c
@@ -0,0 +1,441 @@
+/*
+ * Copyright © 2018 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.
+ *
+ */
+
+#include "igt.h"
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+
+#include <drm.h>
+
+#include "i915/gem_context.h"
+
+#define engine_class(e, n) ((e)->class_instance[(n)].engine_class)
+#define engine_instance(e, n) ((e)->class_instance[(n)].engine_instance)
+
+static bool has_context_engines(int i915)
+{
+	struct drm_i915_gem_context_param param = {
+		.ctx_id = 0,
+		.param = I915_CONTEXT_PARAM_ENGINES,
+	};
+	return __gem_context_set_param(i915, &param) == 0;
+}
+
+static void invalid_engines(int i915)
+{
+	struct i915_context_param_engines stack = {}, *engines;
+	struct drm_i915_gem_context_param param = {
+		.ctx_id = gem_context_create(i915),
+		.param = I915_CONTEXT_PARAM_ENGINES,
+		.value = to_user_pointer(&stack),
+	};
+	uint32_t handle;
+	void *ptr;
+
+	param.size = 0;
+	igt_assert_eq(__gem_context_set_param(i915, &param), 0);
+
+	param.size = 1;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EINVAL);
+
+	param.size = sizeof(stack) - 1;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EINVAL);
+
+	param.size = sizeof(stack) + 1;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EINVAL);
+
+	param.size = 0;
+	igt_assert_eq(__gem_context_set_param(i915, &param), 0);
+
+	/* Create a single page surrounded by inaccessible nothingness */
+	ptr = mmap(NULL, 3 * 4096, PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
+	igt_assert(ptr != MAP_FAILED);
+
+	munmap(ptr, 4096);
+	engines = ptr + 4096;
+	munmap(ptr + 2 *4096, 4096);
+
+	param.size = sizeof(*engines) + sizeof(*engines->class_instance);
+	param.value = to_user_pointer(engines);
+
+	engines->class_instance[0].engine_class = -1;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -ENOENT);
+
+	mprotect(engines, 4096, PROT_READ);
+	igt_assert_eq(__gem_context_set_param(i915, &param), -ENOENT);
+
+	mprotect(engines, 4096, PROT_WRITE);
+	engines->class_instance[0].engine_class = 0;
+	if (__gem_context_set_param(i915, &param)) /* XXX needs RCS */
+		goto out;
+
+	engines->extensions = to_user_pointer(ptr);
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	engines->extensions = 0;
+	igt_assert_eq(__gem_context_set_param(i915, &param), 0);
+
+	param.value = to_user_pointer(engines - 1);
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines) - 1;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines) - param.size +  1;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines) + 4096;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines) - param.size + 4096;
+	igt_assert_eq(__gem_context_set_param(i915, &param), 0);
+
+	param.value = to_user_pointer(engines) - param.size + 4096 + 1;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines) + 4096;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines) + 4096 - 1;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines) - 1;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines - 1);
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines - 1) + 4096;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(engines - 1) + 4096 - sizeof(*engines->class_instance) / 2;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	handle = gem_create(i915, 4096 * 3);
+	ptr = gem_mmap__gtt(i915, handle, 4096 * 3, PROT_READ);
+	gem_close(i915, handle);
+
+	munmap(ptr, 4096);
+	munmap(ptr + 8192, 4096);
+
+	param.value = to_user_pointer(ptr + 4096);
+	igt_assert_eq(__gem_context_set_param(i915, &param), 0);
+
+	param.value = to_user_pointer(ptr);
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(ptr) + 4095;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(ptr) + 8192;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	param.value = to_user_pointer(ptr) + 12287;
+	igt_assert_eq(__gem_context_set_param(i915, &param), -EFAULT);
+
+	munmap(ptr + 4096, 4096);
+
+out:
+	munmap(engines, 4096);
+	gem_context_destroy(i915, param.ctx_id);
+}
+
+static void idempotent(int i915)
+{
+	I915_DEFINE_CONTEXT_PARAM_ENGINES(engines , I915_EXEC_RING_MASK + 1);
+	I915_DEFINE_CONTEXT_PARAM_ENGINES(expected , I915_EXEC_RING_MASK + 1);
+	struct drm_i915_gem_context_param p = {
+		.ctx_id = gem_context_create(i915),
+		.param = I915_CONTEXT_PARAM_ENGINES,
+		.value = to_user_pointer(&engines),
+		.size = sizeof(engines),
+	};
+	const size_t base = sizeof(struct i915_context_param_engines);
+	const struct intel_execution_engine2 *e;
+	int idx;
+
+	/* What goes in, must come out. And what comes out, must go in */
+
+	gem_context_get_param(i915, &p);
+	igt_assert_eq(p.size, 0); /* atm default is to use legacy ring mask */
+
+	idx = 0;
+	memset(&engines, 0, sizeof(engines));
+	for_each_engine_class_instance(i915, e) {
+		engines.class_instance[idx].engine_class = e->class;
+		engines.class_instance[idx].engine_instance = e->instance;
+		idx++;
+	}
+	idx *= sizeof(*engines.class_instance);
+	p.size = base + idx;
+	gem_context_set_param(i915, &p);
+
+	memcpy(&expected, &engines, sizeof(expected));
+
+	gem_context_get_param(i915, &p);
+	igt_assert_eq(p.size, base + idx);
+	igt_assert(!memcmp(&expected, &engines, idx));
+
+	p.size = base;
+	gem_context_set_param(i915, &p);
+	gem_context_get_param(i915, &p);
+	igt_assert_eq(p.size, base);
+
+	/* and it should not have overwritten the previous contents */
+	igt_assert(!memcmp(&expected, &engines, idx));
+
+	memset(&engines, 0, sizeof(engines));
+	engines.class_instance[0].engine_class = I915_ENGINE_CLASS_INVALID;
+	engines.class_instance[0].engine_instance = I915_ENGINE_CLASS_INVALID_NONE;
+	idx = sizeof(*engines.class_instance);
+	p.size = base + idx;
+	gem_context_set_param(i915, &p);
+
+	memcpy(&expected, &engines, sizeof(expected));
+
+	gem_context_get_param(i915, &p);
+	igt_assert_eq(p.size, base + idx);
+	igt_assert(!memcmp(&expected, &engines, idx));
+
+	memset(&engines, 0, sizeof(engines));
+	p.size = sizeof(engines);
+	gem_context_set_param(i915, &p);
+
+	memcpy(&expected, &engines, sizeof(expected));
+
+	gem_context_get_param(i915, &p);
+	igt_assert_eq(p.size, sizeof(engines));
+	igt_assert(!memcmp(&expected, &engines, idx));
+
+	gem_context_destroy(i915, p.ctx_id);
+}
+
+static void execute_one(int i915)
+{
+	I915_DEFINE_CONTEXT_PARAM_ENGINES(engines , I915_EXEC_RING_MASK + 1);
+	struct drm_i915_gem_context_param param = {
+		.ctx_id = gem_context_create(i915),
+		.param = I915_CONTEXT_PARAM_ENGINES,
+		.value = to_user_pointer(&engines),
+		/* .size to be filled in later */
+	};
+	struct drm_i915_gem_exec_object2 obj = {
+		.handle = gem_create(i915, 4096),
+	};
+	struct drm_i915_gem_execbuffer2 execbuf = {
+		.buffers_ptr = to_user_pointer(&obj),
+		.buffer_count = 1,
+		.rsvd1 = param.ctx_id,
+	};
+	const uint32_t bbe = MI_BATCH_BUFFER_END;
+	const struct intel_execution_engine2 *e;
+
+	gem_write(i915, obj.handle, 0, &bbe, sizeof(bbe));
+
+	/* Unadulterated I915_EXEC_DEFAULT should work */
+	execbuf.flags = 0;
+	igt_assert_eq(__gem_execbuf(i915, &execbuf), 0);
+	gem_sync(i915, obj.handle);
+
+	for_each_engine_class_instance(i915, e) {
+		struct drm_i915_gem_busy busy = { .handle = obj.handle };
+
+		for (int i = -1; i <= I915_EXEC_RING_MASK; i++) {
+			igt_spin_t *spin;
+
+			memset(&engines, 0, sizeof(engines));
+			engine_class(&engines, 0) = e->class;
+			engine_instance(&engines, 0) = e->instance;
+			param.size = offsetof(typeof(engines), class_instance[1]);
+			gem_context_set_param(i915, &param);
+
+			spin = igt_spin_batch_new(i915,
+						  .ctx = param.ctx_id,
+						  .engine = 0);
+
+			igt_debug("Testing with map of %d engines\n", i + 1);
+			memset(&engines.class_instance, -1, sizeof(engines.class_instance));
+			if (i != -1) {
+				engine_class(&engines, i) = e->class;
+				engine_instance(&engines, i) = e->instance;
+			}
+			param.size = sizeof(uint64_t) + (i + 1) * sizeof(uint32_t);
+			gem_context_set_param(i915, &param);
+
+			for (int j = 0; j <= I915_EXEC_RING_MASK; j++) {
+				int err;
+
+				execbuf.flags = j;
+				err =__gem_execbuf(i915, &execbuf);
+				if (j == i) {
+					igt_assert_f(err == 0,
+						     "Failed to report the valid engine for slot %d\n",
+						     i);
+				} else {
+					igt_assert_f(err == -EINVAL,
+						     "Failed to report an invalid engine for slot %d (valid at %d)\n",
+						     j, i);
+				}
+			}
+
+			do_ioctl(i915, DRM_IOCTL_I915_GEM_BUSY, &busy);
+			if (i != -1) {
+				igt_assert_eq(busy.busy, 1 << (e->class + 16));
+			} else {
+				igt_assert_eq(busy.busy, 0);
+			}
+
+			igt_spin_batch_free(i915, spin);
+
+			gem_sync(i915, obj.handle);
+			do_ioctl(i915, DRM_IOCTL_I915_GEM_BUSY, &busy);
+			igt_assert_eq(busy.busy, 0);
+		}
+	}
+
+	/* Restore the defaults and check I915_EXEC_DEFAULT works again. */
+	param.size = 0;
+	gem_context_set_param(i915, &param);
+	execbuf.flags = 0;
+	igt_assert_eq(__gem_execbuf(i915, &execbuf), 0);
+
+	gem_close(i915, obj.handle);
+	gem_context_destroy(i915, param.ctx_id);
+}
+
+static void execute_oneforall(int i915)
+{
+	I915_DEFINE_CONTEXT_PARAM_ENGINES(engines , I915_EXEC_RING_MASK + 1);
+	struct drm_i915_gem_context_param param = {
+		.ctx_id = gem_context_create(i915),
+		.param = I915_CONTEXT_PARAM_ENGINES,
+		.value = to_user_pointer(&engines),
+		.size = sizeof(engines),
+	};
+	const struct intel_execution_engine2 *e;
+
+	for_each_engine_class_instance(i915, e) {
+		memset(&engines, 0, sizeof(engines));
+		for (int i = 0; i <= I915_EXEC_RING_MASK; i++) {
+			engine_class(&engines, i) = e->class;
+			engine_instance(&engines, i) = e->instance;
+		}
+		gem_context_set_param(i915, &param);
+
+		for (int i = 0; i <= I915_EXEC_RING_MASK; i++) {
+			struct drm_i915_gem_busy busy = {};
+			igt_spin_t *spin;
+
+			spin = __igt_spin_batch_new(i915,
+						    .ctx = param.ctx_id,
+						    .engine = i);
+
+			busy.handle = spin->handle;
+			do_ioctl(i915, DRM_IOCTL_I915_GEM_BUSY, &busy);
+			igt_assert_eq(busy.busy, 1 << (e->class + 16));
+
+			igt_spin_batch_free(i915, spin);
+		}
+	}
+
+	gem_context_destroy(i915, param.ctx_id);
+}
+
+static void execute_allforone(int i915)
+{
+	I915_DEFINE_CONTEXT_PARAM_ENGINES(engines , I915_EXEC_RING_MASK + 1);
+	struct drm_i915_gem_context_param param = {
+		.ctx_id = gem_context_create(i915),
+		.param = I915_CONTEXT_PARAM_ENGINES,
+		.value = to_user_pointer(&engines),
+	};
+	const struct intel_execution_engine2 *e;
+	int i;
+
+	i = 0;
+	memset(&engines, 0, sizeof(engines));
+	for_each_engine_class_instance(i915, e) {
+		engine_class(&engines, i) = e->class;
+		engine_instance(&engines, i) = e->instance;
+		i++;
+	}
+	param.size = sizeof(uint64_t) + i * sizeof(uint32_t);
+	gem_context_set_param(i915, &param);
+
+	i = 0;
+	for_each_engine_class_instance(i915, e) {
+		struct drm_i915_gem_busy busy = {};
+		igt_spin_t *spin;
+
+		spin = __igt_spin_batch_new(i915,
+					    .ctx = param.ctx_id,
+					    .engine = i++);
+
+		busy.handle = spin->handle;
+		do_ioctl(i915, DRM_IOCTL_I915_GEM_BUSY, &busy);
+		igt_assert_eq(busy.busy, 1 << (e->class + 16));
+
+		igt_spin_batch_free(i915, spin);
+	}
+
+	gem_context_destroy(i915, param.ctx_id);
+}
+
+igt_main
+{
+	int i915 = -1;
+
+	igt_fixture {
+		i915 = drm_open_driver_render(DRIVER_INTEL);
+		igt_require_gem(i915);
+
+		gem_require_contexts(i915);
+		igt_require(has_context_engines(i915));
+	}
+
+	igt_subtest("invalid-engines")
+		invalid_engines(i915);
+
+	igt_subtest("idempotent")
+		idempotent(i915);
+
+	igt_subtest("execute-one")
+		execute_one(i915);
+
+	igt_subtest("execute-oneforall")
+		execute_oneforall(i915);
+
+	igt_subtest("execute-allforone")
+		execute_allforone(i915);
+}
diff --git a/tests/meson.build b/tests/meson.build
index e005c79c4..abfc85f46 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -110,6 +110,7 @@ i915_progs = [
 	'gem_ctx_bad_destroy',
 	'gem_ctx_clone',
 	'gem_ctx_create',
+	'gem_ctx_engines',
 	'gem_ctx_exec',
 	'gem_ctx_isolation',
 	'gem_ctx_param',
-- 
2.20.1

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