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, 327 insertions, 0 deletions

diff --git a/tests/i915/gem_ctx_switch.c b/tests/i915/gem_ctx_switch.c
new file mode 100644
index 00000000..1208cb8d
--- /dev/null
+++ b/tests/i915/gem_ctx_switch.c
@@ -0,0 +1,327 @@
+/*
+ * 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 "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 <time.h>
+#include "drm.h"
+
+#define LOCAL_I915_EXEC_NO_RELOC (1<<11)
+#define LOCAL_I915_EXEC_HANDLE_LUT (1<<12)
+
+#define INTERRUPTIBLE 1
+
+static double elapsed(const struct timespec *start, const struct timespec *end)
+{
+	return ((end->tv_sec - start->tv_sec) +
+		(end->tv_nsec - start->tv_nsec)*1e-9);
+}
+
+static int measure_qlen(int fd,
+			struct drm_i915_gem_execbuffer2 *execbuf,
+			unsigned int *engine, unsigned int nengine,
+			int timeout)
+{
+	const struct drm_i915_gem_exec_object2 * const obj =
+		(struct drm_i915_gem_exec_object2 *)(uintptr_t)execbuf->buffers_ptr;
+	int qlen = 64;
+
+	for (unsigned int n = 0; n < nengine; n++) {
+		uint64_t saved = execbuf->flags;
+		struct timespec tv = {};
+
+		execbuf->flags |= engine[n];
+
+		igt_nsec_elapsed(&tv);
+		for (int loop = 0; loop < qlen; loop++)
+			gem_execbuf(fd, execbuf);
+		gem_sync(fd, obj->handle);
+
+		execbuf->flags = saved;
+
+		/*
+		 * Be conservative and aim not to overshoot timeout, so scale
+		 * down by 8 for hopefully a max of 12.5% error.
+		 */
+		qlen = qlen * timeout * 1e9 / igt_nsec_elapsed(&tv) / 8 + 1;
+	}
+
+	return qlen;
+}
+
+static void single(int fd, uint32_t handle,
+		   const struct intel_execution_engine *e,
+		   unsigned flags,
+		   const int ncpus,
+		   int timeout)
+{
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 obj;
+	struct drm_i915_gem_relocation_entry reloc;
+	uint32_t contexts[64];
+	struct {
+		double elapsed;
+		unsigned long count;
+	} *shared;
+	int n;
+
+	shared = mmap(NULL, 4096, PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0);
+	igt_assert(shared != MAP_FAILED);
+
+	gem_require_ring(fd, e->exec_id | e->flags);
+
+	for (n = 0; n < 64; n++)
+		contexts[n] = gem_context_create(fd);
+
+	memset(&obj, 0, sizeof(obj));
+	obj.handle = handle;
+
+	if (flags & INTERRUPTIBLE) {
+		/* Be tricksy and force a relocation every batch so that
+		 * we don't emit the batch but just do MI_SET_CONTEXT
+		 */
+		memset(&reloc, 0, sizeof(reloc));
+		reloc.offset = 1024;
+		reloc.read_domains = I915_GEM_DOMAIN_INSTRUCTION;
+		obj.relocs_ptr = to_user_pointer(&reloc);
+		obj.relocation_count = 1;
+	}
+
+	memset(&execbuf, 0, sizeof(execbuf));
+	execbuf.buffers_ptr = to_user_pointer(&obj);
+	execbuf.buffer_count = 1;
+	execbuf.rsvd1 = contexts[0];
+	execbuf.flags = e->exec_id | e->flags;
+	execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
+	execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
+	igt_require(__gem_execbuf(fd, &execbuf) == 0);
+	if (__gem_execbuf(fd, &execbuf)) {
+		execbuf.flags = e->exec_id | e->flags;
+		reloc.target_handle = obj.handle;
+		gem_execbuf(fd, &execbuf);
+	}
+	gem_sync(fd, handle);
+
+	igt_fork(child, ncpus) {
+		struct timespec start, now;
+		unsigned int count = 0;
+
+		/* Warmup to bind all objects into each ctx before we begin */
+		for (int i = 0; i < ARRAY_SIZE(contexts); i++) {
+			execbuf.rsvd1 = contexts[i];
+			gem_execbuf(fd, &execbuf);
+		}
+		gem_sync(fd, handle);
+
+		clock_gettime(CLOCK_MONOTONIC, &start);
+		do {
+			igt_while_interruptible(flags & INTERRUPTIBLE) {
+				for (int loop = 0; loop < 64; loop++) {
+					execbuf.rsvd1 = contexts[loop % 64];
+					reloc.presumed_offset = -1;
+					gem_execbuf(fd, &execbuf);
+				}
+				count += 64;
+			}
+			clock_gettime(CLOCK_MONOTONIC, &now);
+		} while (elapsed(&start, &now) < timeout);
+		gem_sync(fd, handle);
+		clock_gettime(CLOCK_MONOTONIC, &now);
+
+		igt_info("[%d] %s: %'u cycles: %.3fus%s\n",
+			 child, e->name, count, elapsed(&start, &now)*1e6 / count,
+			 flags & INTERRUPTIBLE ? " (interruptible)" : "");
+
+		shared[child].elapsed = elapsed(&start, &now);
+		shared[child].count = count;
+	}
+	igt_waitchildren();
+
+	if (ncpus > 1) {
+		unsigned long total = 0;
+		double max = 0;
+
+		for (n = 0; n < ncpus; n++) {
+			total += shared[n].count;
+			if (shared[n].elapsed > max)
+				max = shared[n].elapsed;
+		}
+
+		igt_info("Total %s: %'lu cycles: %.3fus%s\n",
+			 e->name, total, max*1e6 / total,
+			 flags & INTERRUPTIBLE ? " (interruptible)" : "");
+	}
+
+	for (n = 0; n < 64; n++)
+		gem_context_destroy(fd, contexts[n]);
+
+	munmap(shared, 4096);
+}
+
+static void all(int fd, uint32_t handle, unsigned flags, int timeout)
+{
+	struct drm_i915_gem_execbuffer2 execbuf;
+	struct drm_i915_gem_exec_object2 obj[2];
+	unsigned int engine[16], e;
+	const char *name[16];
+	uint32_t contexts[65];
+	unsigned int nengine;
+	int n, qlen;
+
+	nengine = 0;
+	for_each_physical_engine(fd, e) {
+		engine[nengine] = e;
+		name[nengine] = e__->name;
+		nengine++;
+	}
+	igt_require(nengine);
+
+	for (n = 0; n < ARRAY_SIZE(contexts); n++)
+		contexts[n] = gem_context_create(fd);
+
+	memset(obj, 0, sizeof(obj));
+	obj[1].handle = handle;
+
+	memset(&execbuf, 0, sizeof(execbuf));
+	execbuf.buffers_ptr = to_user_pointer(obj + 1);
+	execbuf.buffer_count = 1;
+	execbuf.rsvd1 = contexts[0];
+	execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
+	execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
+	igt_require(__gem_execbuf(fd, &execbuf) == 0);
+	gem_sync(fd, handle);
+
+	qlen = measure_qlen(fd, &execbuf, engine, nengine, timeout);
+	igt_info("Using timing depth of %d batches\n", qlen);
+
+	execbuf.buffers_ptr = to_user_pointer(obj);
+	execbuf.buffer_count = 2;
+
+	for (int pot = 2; pot <= 64; pot *= 2) {
+		for (int nctx = pot - 1; nctx <= pot + 1; nctx++) {
+			igt_fork(child, nengine) {
+				struct timespec start, now;
+				unsigned int count = 0;
+
+				obj[0].handle = gem_create(fd, 4096);
+				execbuf.flags |= engine[child];
+				for (int loop = 0; loop < ARRAY_SIZE(contexts); loop++) {
+					execbuf.rsvd1 = contexts[loop];
+					gem_execbuf(fd, &execbuf);
+				}
+				gem_sync(fd, obj[0].handle);
+
+				clock_gettime(CLOCK_MONOTONIC, &start);
+				do {
+					for (int loop = 0; loop < qlen; loop++) {
+						execbuf.rsvd1 = contexts[loop % nctx];
+						gem_execbuf(fd, &execbuf);
+					}
+					count += qlen;
+					gem_sync(fd, obj[0].handle);
+					clock_gettime(CLOCK_MONOTONIC, &now);
+				} while (elapsed(&start, &now) < timeout);
+				gem_sync(fd, obj[0].handle);
+				clock_gettime(CLOCK_MONOTONIC, &now);
+				gem_close(fd, obj[0].handle);
+
+				igt_info("[%d:%d] %s: %'u cycles: %.3fus%s\n",
+					 nctx, child, name[child], count, elapsed(&start, &now)*1e6 / count,
+					 flags & INTERRUPTIBLE ? " (interruptible)" : "");
+			}
+			igt_waitchildren();
+		}
+	}
+
+	for (n = 0; n < ARRAY_SIZE(contexts); n++)
+		gem_context_destroy(fd, contexts[n]);
+}
+
+igt_main
+{
+	const int ncpus = sysconf(_SC_NPROCESSORS_ONLN);
+	const struct intel_execution_engine *e;
+	uint32_t light = 0, heavy;
+	int fd = -1;
+
+	igt_fixture {
+		const uint32_t bbe = MI_BATCH_BUFFER_END;
+
+		fd = drm_open_driver(DRIVER_INTEL);
+		igt_require_gem(fd);
+
+		gem_require_contexts(fd);
+
+		light = gem_create(fd, 4096);
+		gem_write(fd, light, 0, &bbe, sizeof(bbe));
+
+		heavy = gem_create(fd, 4096*1024);
+		gem_write(fd, heavy, 4096*1024-sizeof(bbe), &bbe, sizeof(bbe));
+
+		igt_fork_hang_detector(fd);
+	}
+
+	for (e = intel_execution_engines; e->name; e++) {
+		igt_subtest_f("%s%s", e->exec_id == 0 ? "basic-" : "", e->name)
+			single(fd, light, e, 0, 1, 5);
+
+		igt_skip_on_simulation();
+
+		igt_subtest_f("%s%s-heavy", e->exec_id == 0 ? "basic-" : "", e->name)
+			single(fd, heavy, e, 0, 1, 5);
+		igt_subtest_f("%s-interruptible", e->name)
+			single(fd, light, e, INTERRUPTIBLE, 1, 150);
+		igt_subtest_f("forked-%s", e->name)
+			single(fd, light, e, 0, ncpus, 150);
+		igt_subtest_f("forked-%s-heavy", e->name)
+			single(fd, heavy, e, 0, ncpus, 150);
+		igt_subtest_f("forked-%s-interruptible", e->name)
+			single(fd, light, e, INTERRUPTIBLE, ncpus, 150);
+	}
+
+	igt_subtest("basic-all-light")
+		all(fd, light, 0, 5);
+	igt_subtest("basic-all-heavy")
+		all(fd, heavy, 0, 5);
+
+	igt_fixture {
+		igt_stop_hang_detector();
+		gem_close(fd, heavy);
+		gem_close(fd, light);
+		close(fd);
+	}
+}