test/amdgpu/hotunplug: Add test suite for GPU unplug

Add plug/unplug device and open/close device file
infrastructure.
Add basic test - unplug device while device file still
open. Close device file afterwards and replug the device.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher alexander.deucher@amd.com

4 files changed, 226 insertions, 0 deletions

diff --git a/tests/amdgpu/amdgpu_test.c b/tests/amdgpu/amdgpu_test.c
index 7c35d9a0..6e0d3699 100644
--- a/tests/amdgpu/amdgpu_test.c
+++ b/tests/amdgpu/amdgpu_test.c
@@ -66,6 +66,7 @@
 #define RAS_TESTS_STR "RAS Tests"
 #define SYNCOBJ_TIMELINE_TESTS_STR "SYNCOBJ TIMELINE Tests"
 #define SECURITY_TESTS_STR "Security Tests"
+#define HOTUNPLUG_TESTS_STR "Hotunplug Tests"
 
 /**
  *  Open handles for amdgpu devices
@@ -144,6 +145,12 @@ static CU_SuiteInfo suites[] = {
 		.pCleanupFunc = suite_security_tests_clean,
 		.pTests = security_tests,
 	},
+	{
+		.pName = HOTUNPLUG_TESTS_STR,
+		.pInitFunc = suite_hotunplug_tests_init,
+		.pCleanupFunc = suite_hotunplug_tests_clean,
+		.pTests = hotunplug_tests,
+	},
 
 	CU_SUITE_INFO_NULL,
 };
@@ -205,6 +212,10 @@ static Suites_Active_Status suites_active_stat[] = {
 			.pName = SECURITY_TESTS_STR,
 			.pActive = suite_security_tests_enable,
 		},
+		{
+			.pName = HOTUNPLUG_TESTS_STR,
+			.pActive = suite_hotunplug_tests_enable,
+		},
 };
 
 
diff --git a/tests/amdgpu/amdgpu_test.h b/tests/amdgpu/amdgpu_test.h
index 9e4515c4..cc12756d 100644
--- a/tests/amdgpu/amdgpu_test.h
+++ b/tests/amdgpu/amdgpu_test.h
@@ -273,6 +273,29 @@ amdgpu_command_submission_write_linear_helper_with_secure(amdgpu_device_handle
 							  unsigned ip_type,
 							  bool secure);
 
+
+
+/**
+ * Initialize hotunplug test suite
+ */
+int suite_hotunplug_tests_init();
+
+/**
+ * Deinitialize hotunplug test suite
+ */
+int suite_hotunplug_tests_clean();
+
+/**
+ * Decide if the suite is enabled by default or not.
+ */
+CU_BOOL suite_hotunplug_tests_enable(void);
+
+/**
+ * Tests in uvd enc test suite
+ */
+extern CU_TestInfo hotunplug_tests[];
+
+
 /**
  * Helper functions
  */
diff --git a/tests/amdgpu/hotunplug_tests.c b/tests/amdgpu/hotunplug_tests.c
new file mode 100644
index 00000000..99854993
--- /dev/null
+++ b/tests/amdgpu/hotunplug_tests.c
@@ -0,0 +1,191 @@
+/*
+ * Copyright 2021 Advanced Micro Devices, Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#if HAVE_ALLOCA_H
+# include <alloca.h>
+#endif
+
+#include "CUnit/Basic.h"
+
+#include "amdgpu_test.h"
+#include "amdgpu_drm.h"
+#include "amdgpu_internal.h"
+#include "xf86drm.h"
+#include <pthread.h>
+
+
+static  amdgpu_device_handle device_handle;
+static  uint32_t  major_version;
+static  uint32_t  minor_version;
+static char *sysfs_remove = NULL;
+
+CU_BOOL suite_hotunplug_tests_enable(void)
+{
+	CU_BOOL enable = CU_TRUE;
+	drmDevicePtr device;
+
+	if (drmGetDevice2(drm_amdgpu[0], DRM_DEVICE_GET_PCI_REVISION, &device)) {
+		printf("\n\nGPU Failed to get DRM device PCI info!\n");
+		return CU_FALSE;
+	}
+
+	if (device->bustype != DRM_BUS_PCI) {
+		printf("\n\nGPU device is not on PCI bus!\n");
+		amdgpu_device_deinitialize(device_handle);
+		return CU_FALSE;
+	}
+
+	/* Disable until the hot-unplug support in kernel gets into drm-next */
+	if (major_version < 0xff)
+		enable = false;
+
+	if (amdgpu_device_initialize(drm_amdgpu[0], &major_version,
+					     &minor_version, &device_handle))
+		return CU_FALSE;
+
+	/* TODO Once DRM version for unplug feature ready compare here agains it*/
+
+	if (amdgpu_device_deinitialize(device_handle))
+		return CU_FALSE;
+
+	return enable;
+}
+
+int suite_hotunplug_tests_init(void)
+{
+	/* We need to open/close device at each test manually */
+	amdgpu_close_devices();
+
+	return CUE_SUCCESS;
+}
+
+int suite_hotunplug_tests_clean(void)
+{
+
+
+	return CUE_SUCCESS;
+}
+
+static int amdgpu_hotunplug_trigger(const char *pathname)
+{
+	int fd, len;
+
+	fd = open(pathname, O_WRONLY);
+	if (fd < 0)
+		return -errno;
+
+	len = write(fd, "1", 1);
+	close(fd);
+
+	return len;
+}
+
+static int amdgpu_hotunplug_setup_test()
+{
+	int r;
+	char *tmp_str;
+
+	if (amdgpu_open_device_on_test_index(open_render_node) <= 0) {
+		printf("\n\n Failed to reopen device file!\n");
+		return CUE_SINIT_FAILED;
+
+
+
+	}
+
+	r = amdgpu_device_initialize(drm_amdgpu[0], &major_version,
+				   &minor_version, &device_handle);
+
+	if (r) {
+		if ((r == -EACCES) && (errno == EACCES))
+			printf("\n\nError:%s. "
+				"Hint:Try to run this test program as root.",
+				strerror(errno));
+		return CUE_SINIT_FAILED;
+	}
+
+	tmp_str = amdgpu_get_device_from_fd(drm_amdgpu[0]);
+	if (!tmp_str){
+		printf("\n\n Device path not found!\n");
+		return  CUE_SINIT_FAILED;
+	}
+
+	sysfs_remove = realloc(tmp_str, strlen(tmp_str) * 2);
+	strcat(sysfs_remove, "/remove");
+
+	return 0;
+
+}
+
+static int amdgpu_hotunplug_teardown_test()
+{
+	if (amdgpu_device_deinitialize(device_handle))
+		return CUE_SCLEAN_FAILED;
+
+	amdgpu_close_devices();
+
+	if (sysfs_remove)
+		free(sysfs_remove);
+
+	return 0;
+}
+
+static inline int amdgpu_hotunplug_remove()
+{
+	return amdgpu_hotunplug_trigger(sysfs_remove);
+}
+
+static inline int amdgpu_hotunplug_rescan()
+{
+	return amdgpu_hotunplug_trigger("/sys/bus/pci/rescan");
+}
+
+
+static void amdgpu_hotunplug_simple(void)
+{
+	int r;
+
+	r = amdgpu_hotunplug_setup_test();
+	CU_ASSERT_EQUAL(r , 0);
+
+	r = amdgpu_hotunplug_remove();
+	CU_ASSERT_EQUAL(r > 0, 1);
+
+	r = amdgpu_hotunplug_teardown_test();
+	CU_ASSERT_EQUAL(r , 0);
+
+	r = amdgpu_hotunplug_rescan();
+	CU_ASSERT_EQUAL(r > 0, 1);
+}
+
+CU_TestInfo hotunplug_tests[] = {
+	{ "Unplug card and rescan the bus to plug it back", amdgpu_hotunplug_simple },
+	CU_TEST_INFO_NULL,
+};
+
+
diff --git a/tests/amdgpu/meson.build b/tests/amdgpu/meson.build
index eb16a50c..e6e30812 100644
--- a/tests/amdgpu/meson.build
+++ b/tests/amdgpu/meson.build
@@ -25,6 +25,7 @@ if dep_cunit.found()
       'amdgpu_test.c', 'basic_tests.c', 'bo_tests.c', 'cs_tests.c',
       'vce_tests.c', 'uvd_enc_tests.c', 'vcn_tests.c', 'deadlock_tests.c',
       'vm_tests.c', 'ras_tests.c', 'syncobj_tests.c', 'security_tests.c',
+      'hotunplug_tests.c'
     ),
     dependencies : [dep_cunit, dep_threads, dep_atomic_ops],
     include_directories : [inc_root, inc_drm, include_directories('../../amdgpu')],