From: Imre Deak <imre.deak@xxxxxxxxx>
Add a test to exercise the kernel's mechanism to detection of RC6
context corruptions, take the necessary action in response (disable
RC6 and runtime PM) and recover when possible (after system
suspend/resume).
v2:
- Skip test on non-existing engines.
- Fix for old kernels where the command parser returned EINVAL
instead of EACCESS for a banned privilidged command.
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
---
tests/Makefile.sources | 3 +
tests/i915/i915_rc6_ctx_corruption.c | 196 +++++++++++++++++++++++++++
tests/meson.build | 1 +
3 files changed, 200 insertions(+)
create mode 100644 tests/i915/i915_rc6_ctx_corruption.c
diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 75c79edb..c0f401c7 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -529,6 +529,9 @@ i915_pm_sseu_SOURCES = i915/i915_pm_sseu.c
TESTS_progs += i915_query
i915_query_SOURCES = i915/i915_query.c
+TESTS_progs += i915_rc6_ctx_corruption
+i915_rc6_ctx_corruption_SOURCES = i915/i915_rc6_ctx_corruption.c
+
TESTS_progs += i915_selftest
i915_selftest_SOURCES = i915/i915_selftest.c
diff --git a/tests/i915/i915_rc6_ctx_corruption.c b/tests/i915/i915_rc6_ctx_corruption.c
new file mode 100644
index 00000000..a3326307
--- /dev/null
+++ b/tests/i915/i915_rc6_ctx_corruption.c
@@ -0,0 +1,196 @@
+/*
+ * Copyright © 2019 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 <stdint.h>
+
+#include "igt.h"
+#include "igt_gt.h"
+#include "igt_device.h"
+
+#define CTX_INFO_REG 0xA300
+
+static int drm_fd;
+static struct pci_device *pci_dev;
+static uint32_t devid;
+
+static int read_reg_on_engine(const struct intel_execution_engine2 *engine,
+ int reg_address, uint32_t *reg_val)
+{
+ const bool r64b = intel_gen(devid) >= 8;
+ struct drm_i915_gem_exec_object2 obj[2];
+ struct drm_i915_gem_relocation_entry reloc[1];
+ struct drm_i915_gem_execbuffer2 execbuf;
+ uint32_t *batch;
+ uint32_t *dst_buf;
+ int ret;
+ int i;
+
+ memset(obj, 0, sizeof(obj));
+ obj[0].handle = gem_create(drm_fd, 4096);
+ obj[1].handle = gem_create(drm_fd, 4096);
+ obj[1].relocs_ptr = to_user_pointer(reloc);
+ obj[1].relocation_count = 1;
+
+ batch = gem_mmap__cpu(drm_fd, obj[1].handle, 0, 4096, PROT_WRITE);
+ gem_set_domain(drm_fd, obj[1].handle,
+ I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU);
+
+ i = 0;
+ batch[i++] = 0x24 << 23 | (1 + r64b); /* SRM */
+ batch[i++] = reg_address;
+ reloc[0].target_handle = obj[0].handle;
+ reloc[0].presumed_offset = obj[0].offset;
+ reloc[0].offset = i * sizeof(uint32_t);
+ reloc[0].delta = 0;
+ reloc[0].read_domains = I915_GEM_DOMAIN_RENDER;
+ reloc[0].write_domain = I915_GEM_DOMAIN_RENDER;
+ batch[i++] = reloc[0].delta;
+ if (r64b)
+ batch[i++] = 0;
+
+ batch[i++] = MI_BATCH_BUFFER_END;
+ munmap(batch, 4096);
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = to_user_pointer(obj);
+ execbuf.buffer_count = 2;
+ execbuf.flags = engine->flags;
+
+ ret = __gem_execbuf(drm_fd, &execbuf);
+ gem_close(drm_fd, obj[1].handle);
+
+ if (ret)
+ goto err;
+
+ if (reg_val) {
+ dst_buf = gem_mmap__cpu(drm_fd, obj[0].handle, 0, 4096,
+ PROT_READ);
+ gem_set_domain(drm_fd, obj[0].handle, I915_GEM_DOMAIN_CPU, 0);
+
+ *reg_val = dst_buf[0];
+ munmap(dst_buf, 4096);
+ }
+
+err:
+ gem_close(drm_fd, obj[0].handle);
+
+ return ret;
+}
+
+static bool need_ctx_corruption_wa(void)
+{
+ return IS_BROADWELL(devid) || intel_gen(devid) == 9;
+}
+
+static void test_read_on_engine(const struct intel_execution_engine2 *engine)
+{
+ int ret;
+
+ gem_require_ring(drm_fd, engine->flags);
+
+ /*
+ * Recovery is only possible via an S3 suspend/resume or reboot, so
+ * skip the test if there's no means to recover. Currently this is
+ * only the case when the selected suspend-to-mem mode is 'deep' (S3).
+ */
+ igt_require(!need_ctx_corruption_wa() ||
+ igt_get_suspend_to_mem_mode() == SUSPEND_TO_MEM_DEEP);
+
+ ret = read_reg_on_engine(engine, CTX_INFO_REG, NULL);
+
+ /*
+ * Do we have the blitter engine parser in place, catching the bad
+ * SRM?
+ */
+ if ((ret == -EACCES || ret == -EINVAL) &&
+ engine->class == I915_ENGINE_CLASS_COPY)
+ return;
+
+ igt_assert_eq(ret, 0);
+
+ /*
+ * On a plarform not affected by the corruption issue we are done here
+ * if not yet hung.
+ */
+ if (!need_ctx_corruption_wa())
+ return;
+
+ /* Let it suspend if it can. */
+ sleep(1);
+
+ /*
+ * Due to detection of the corruption, runtime suspend should be
+ * disabled now.
+ */
+ igt_assert(igt_wait_for_pm_status(IGT_RUNTIME_PM_STATUS_ACTIVE));
+
+ /*
+ * Let's check now if system suspend/resume recovers from the problem
+ * as it should.
+ */
+ igt_system_suspend_autoresume(SUSPEND_STATE_MEM, SUSPEND_TEST_NONE);
+ igt_assert(igt_wait_for_pm_status(IGT_RUNTIME_PM_STATUS_SUSPENDED));
+}
+
+static void setup_environment(void)
+{
+ drmModeRes *res;
+
+ drm_fd = drm_open_driver(DRIVER_INTEL);
+ igt_require_gem(drm_fd);
+ pci_dev = intel_get_pci_device();
+ devid = pci_dev->device_id;
+
+ igt_require(igt_setup_runtime_pm());
+
+ kmstest_set_vt_graphics_mode();
+
+ res = drmModeGetResources(drm_fd);
+ igt_assert(res);
+
+ kmstest_unset_all_crtcs(drm_fd, res);
+
+ igt_require(igt_wait_for_pm_status(IGT_RUNTIME_PM_STATUS_SUSPENDED));
+}
+
+static void cleanup_environment(void)
+{
+ close(drm_fd);
+}
+
+igt_main {
+ const struct intel_execution_engine2 *e;
+
+ igt_fixture {
+ setup_environment();
+ }
+
+ for (e = intel_execution_engines2; e->name; e++) {
+ igt_subtest_f("basic-%s", e->name)
+ test_read_on_engine(e);
+ }
+
+ igt_fixture {
+ cleanup_environment();
+ }
+}
diff --git a/tests/meson.build b/tests/meson.build
index 43899b95..56107695 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -237,6 +237,7 @@ i915_progs = [
'i915_pm_dc',
'i915_pm_rps',
'i915_pm_sseu',
+ 'i915_rc6_ctx_corruption',
'i915_query',
'i915_selftest',
'i915_suspend',
--
2.17.1
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