When execbuf2 supports explicit fencing with sync_file in/out fences
(via a fence-fd), we can control execution via the fence.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
tests/Makefile.sources | 1 +
tests/gem_exec_fence.c | 366 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 367 insertions(+)
create mode 100644 tests/gem_exec_fence.c
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 4255fda..ea28dcd 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -36,6 +36,7 @@ TESTS_progs_M = \
gem_exec_basic \
gem_exec_create \
gem_exec_faulting_reloc \
+ gem_exec_fence \
gem_exec_flush \
gem_exec_gttfill \
gem_exec_nop \
diff --git a/tests/gem_exec_fence.c b/tests/gem_exec_fence.c
new file mode 100644
index 0000000..bbf603c
--- /dev/null
+++ b/tests/gem_exec_fence.c
@@ -0,0 +1,366 @@
+/*
+ * Copyright © 2016 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 <sys/ioctl.h>
+#include <sys/poll.h>
+
+IGT_TEST_DESCRIPTION("Check that execbuf waits for explicit fences");
+
+#define LOCAL_PARAM_HAS_EXEC_FENCE 42
+#define LOCAL_EXEC_FENCE_IN (1 << 16)
+#define LOCAL_EXEC_FENCE_OUT (1 << 17)
+#define LOCAL_IOCTL_I915_GEM_EXECBUFFER2_WR DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_EXECBUFFER2, struct drm_i915_gem_execbuffer2)
+
+static void store(int fd, unsigned ring, int fence, uint32_t target, unsigned offset_value)
+{
+ const int SCRATCH = 0;
+ const int BATCH = 1;
+ const int gen = intel_gen(intel_get_drm_devid(fd));
+ struct drm_i915_gem_exec_object2 obj[2];
+ struct drm_i915_gem_relocation_entry reloc;
+ struct drm_i915_gem_execbuffer2 execbuf;
+ uint32_t batch[16];
+ int i;
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = (uintptr_t)obj;
+ execbuf.buffer_count = 2;
+ execbuf.flags = ring | LOCAL_EXEC_FENCE_IN;
+ execbuf.rsvd2 = fence;
+ if (gen < 6)
+ execbuf.flags |= I915_EXEC_SECURE;
+
+ memset(obj, 0, sizeof(obj));
+ obj[SCRATCH].handle = target;
+
+ obj[BATCH].handle = gem_create(fd, 4096);
+ obj[BATCH].relocs_ptr = (uintptr_t)&reloc;
+ obj[BATCH].relocation_count = 1;
+ memset(&reloc, 0, sizeof(reloc));
+
+ i = 0;
+ reloc.target_handle = obj[SCRATCH].handle;
+ reloc.presumed_offset = -1;
+ reloc.offset = sizeof(uint32_t) * (i + 1);
+ reloc.delta = sizeof(uint32_t) * offset_value;
+ reloc.read_domains = I915_GEM_DOMAIN_INSTRUCTION;
+ reloc.write_domain = I915_GEM_DOMAIN_INSTRUCTION;
+ batch[i] = MI_STORE_DWORD_IMM | (gen < 6 ? 1 << 22 : 0);
+ if (gen >= 8) {
+ batch[++i] = reloc.delta;
+ batch[++i] = 0;
+ } else if (gen >= 4) {
+ batch[++i] = 0;
+ batch[++i] = reloc.delta;
+ reloc.offset += sizeof(uint32_t);
+ } else {
+ batch[i]--;
+ batch[++i] = reloc.delta;
+ }
+ batch[++i] = offset_value;
+ batch[++i] = MI_BATCH_BUFFER_END;
+ gem_write(fd, obj[BATCH].handle, 0, batch, sizeof(batch));
+ gem_execbuf(fd, &execbuf);
+ gem_close(fd, obj[BATCH].handle);
+}
+
+static int __gem_execbuf_wr(int fd, struct drm_i915_gem_execbuffer2 *execbuf)
+{
+ int err = 0;
+ if (igt_ioctl(fd, LOCAL_IOCTL_I915_GEM_EXECBUFFER2_WR, execbuf))
+ err = -errno;
+ errno = 0;
+ return err;
+}
+
+static void gem_execbuf_wr(int fd, struct drm_i915_gem_execbuffer2 *execbuf)
+{
+ igt_assert_eq(__gem_execbuf_wr(fd, execbuf), 0);
+}
+
+static bool fence_busy(int fence)
+{
+ struct pollfd pfd = { .fd = fence, .events = POLLIN };
+ return poll(&pfd, 1, 0) == 0;
+}
+
+#define HANG 0x1
+#define NONBLOCK 0x2
+
+static void test_fence_busy(int fd, unsigned ring, unsigned flags)
+{
+ const int gen = intel_gen(intel_get_drm_devid(fd));
+ struct drm_i915_gem_exec_object2 obj;
+ struct drm_i915_gem_relocation_entry reloc;
+ struct drm_i915_gem_execbuffer2 execbuf;
+ struct timespec tv;
+ uint32_t *batch;
+ int fence, i, timeout;
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = (uintptr_t)&obj;
+ execbuf.buffer_count = 1;
+ execbuf.flags = ring | LOCAL_EXEC_FENCE_OUT;
+
+ memset(&obj, 0, sizeof(obj));
+ obj.handle = gem_create(fd, 4096);
+
+ obj.relocs_ptr = (uintptr_t)&reloc;
+ obj.relocation_count = 1;
+ memset(&reloc, 0, sizeof(reloc));
+
+ batch = gem_mmap__wc(fd, obj.handle, 0, 4096, PROT_WRITE);
+ gem_set_domain(fd, obj.handle,
+ I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
+
+ reloc.target_handle = obj.handle; /* recurse */
+ reloc.presumed_offset = 0;
+ reloc.offset = sizeof(uint32_t);
+ reloc.delta = 0;
+ reloc.read_domains = I915_GEM_DOMAIN_COMMAND;
+ reloc.write_domain = 0;
+
+ i = 0;
+ batch[i] = MI_BATCH_BUFFER_START;
+ if (gen >= 8) {
+ batch[i] |= 1 << 8 | 1;
+ batch[++i] = 0;
+ batch[++i] = 0;
+ } else if (gen >= 6) {
+ batch[i] |= 1 << 8;
+ batch[++i] = 0;
+ } else {
+ batch[i] |= 2 << 6;
+ batch[++i] = 0;
+ if (gen < 4) {
+ batch[i] |= 1;
+ reloc.delta = 1;
+ }
+ }
+ i++;
+
+ execbuf.rsvd2 = -1;
+ gem_execbuf_wr(fd, &execbuf);
+ fence = execbuf.rsvd2 >> 32;
+ igt_assert(fence != -1);
+
+ igt_assert(gem_bo_busy(fd, obj.handle));
+ igt_assert(fence_busy(fence));
+
+ timeout = 120;
+ if ((flags & HANG) == 0) {
+ *batch = MI_BATCH_BUFFER_END;
+ __sync_synchronize();
+ timeout = 1;
+ }
+ munmap(batch, 4096);
+
+ memset(&tv, 0, sizeof(tv));
+ while (fence_busy(fence))
+ igt_assert(igt_seconds_elapsed(&tv) < timeout);
+
+ igt_assert(!gem_bo_busy(fd, obj.handle));
+
+ close(fence);
+ gem_close(fd, obj.handle);
+}
+
+static void test_fence_wait(int fd, unsigned ring, unsigned flags)
+{
+ const int gen = intel_gen(intel_get_drm_devid(fd));
+ struct drm_i915_gem_exec_object2 obj;
+ struct drm_i915_gem_relocation_entry reloc;
+ struct drm_i915_gem_execbuffer2 execbuf;
+ uint32_t scratch = gem_create(fd, 4096);
+ uint32_t *batch, *out;
+ unsigned engine;
+ int fence, i;
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = (uintptr_t)&obj;
+ execbuf.buffer_count = 1;
+ execbuf.flags = ring | LOCAL_EXEC_FENCE_OUT;
+
+ memset(&obj, 0, sizeof(obj));
+ obj.handle = gem_create(fd, 4096);
+
+ obj.relocs_ptr = (uintptr_t)&reloc;
+ obj.relocation_count = 1;
+ memset(&reloc, 0, sizeof(reloc));
+
+ out = gem_mmap__wc(fd, scratch, 0, 4096, PROT_WRITE);
+ gem_set_domain(fd, obj.handle,
+ I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
+
+ batch = gem_mmap__wc(fd, obj.handle, 0, 4096, PROT_WRITE);
+ gem_set_domain(fd, obj.handle,
+ I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
+
+ reloc.target_handle = obj.handle; /* recurse */
+ reloc.presumed_offset = 0;
+ reloc.offset = sizeof(uint32_t);
+ reloc.delta = 0;
+ reloc.read_domains = I915_GEM_DOMAIN_COMMAND;
+ reloc.write_domain = 0;
+
+ i = 0;
+ batch[i] = MI_BATCH_BUFFER_START;
+ if (gen >= 8) {
+ batch[i] |= 1 << 8 | 1;
+ batch[++i] = 0;
+ batch[++i] = 0;
+ } else if (gen >= 6) {
+ batch[i] |= 1 << 8;
+ batch[++i] = 0;
+ } else {
+ batch[i] |= 2 << 6;
+ batch[++i] = 0;
+ if (gen < 4) {
+ batch[i] |= 1;
+ reloc.delta = 1;
+ }
+ }
+ i++;
+
+ execbuf.rsvd2 = -1;
+ gem_execbuf_wr(fd, &execbuf);
+ gem_close(fd, obj.handle);
+ fence = execbuf.rsvd2 >> 32;
+ igt_assert(fence != -1);
+
+ i = 0;
+ for_each_engine(fd, engine) {
+ if (flags & NONBLOCK) {
+ store(fd, engine, fence, scratch, i);
+ } else {
+ igt_fork(child, 1)
+ store(fd, engine, fence, scratch, i);
+ }
+ }
+ close(fence);
+
+ sleep(1);
+
+ /* Check for invalidly completing the task early */
+ for (int n = 0; n < i; n++)
+ igt_assert_eq_u32(out[n], 0);
+
+ if ((flags & HANG) == 0) {
+ *batch = MI_BATCH_BUFFER_END;
+ __sync_synchronize();
+ }
+ munmap(batch, 4096);
+
+ igt_waitchildren();
+
+ gem_set_domain(fd, scratch, I915_GEM_DOMAIN_GTT, 0);
+ while (i--)
+ igt_assert_eq_u32(out[i], flags & HANG ? 0 : i);
+ munmap(out, 4096);
+ gem_close(fd, scratch);
+}
+
+static void test_fence_flip(int i915)
+{
+ igt_skip_on_f(1, "no fence-in for atomic flips\n");
+}
+
+static bool gem_has_exec_fence(int fd)
+{
+ struct drm_i915_getparam gp;
+ int val = -1;
+
+ memset(&gp, 0, sizeof(gp));
+ gp.param = LOCAL_PARAM_HAS_EXEC_FENCE;
+ gp.value = &val;
+
+ ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
+
+ return val > 0;
+}
+
+igt_main
+{
+ const struct intel_execution_engine *e;
+ bool can_hang = false;
+ int i915 = -1;
+
+ igt_skip_on_simulation();
+
+ igt_fixture {
+ struct local_i915_gem_context_param param;
+
+ i915 = drm_open_driver_master(DRIVER_INTEL);
+ igt_require(gem_has_exec_fence(i915));
+ gem_require_mmap_wc(i915);
+
+ memset(¶m, 0, sizeof(param));
+ param.param = LOCAL_CONTEXT_PARAM_BAN_PERIOD;
+ param.value = 0;
+ can_hang = __gem_context_set_param(i915, ¶m) == 0;
+ }
+
+ for (e = intel_execution_engines; e->name; e++) {
+ igt_subtest_f("%sbusy-%s",
+ e->exec_id == 0 ? "basic-" : "",
+ e->name) {
+ gem_quiescent_gpu(i915);
+ test_fence_busy(i915, e->exec_id | e->flags, 0);
+ }
+
+ igt_subtest_f("%swait-%s",
+ e->exec_id == 0 ? "basic-" : "",
+ e->name) {
+ gem_quiescent_gpu(i915);
+ test_fence_wait(i915, e->exec_id | e->flags, 0);
+ }
+
+ igt_subtest_f("nb-wait-%s", e->name) {
+ igt_require(can_hang);
+ gem_quiescent_gpu(i915);
+ test_fence_wait(i915, e->exec_id | e->flags, NONBLOCK);
+ }
+
+ igt_subtest_f("busy-hang-%s", e->name) {
+ igt_require(can_hang);
+ gem_quiescent_gpu(i915);
+ test_fence_busy(i915, e->exec_id | e->flags, HANG);
+ }
+ igt_subtest_f("wait-hang-%s", e->name) {
+ igt_require(can_hang);
+ gem_quiescent_gpu(i915);
+ test_fence_wait(i915, e->exec_id | e->flags, HANG);
+ }
+ }
+
+ igt_subtest("flip") {
+ gem_quiescent_gpu(i915);
+ test_fence_flip(i915);
+ }
+
+ igt_fixture {
+ close(i915);
+ }
+}
--
2.9.3
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