gpu: nvgpu: unit: fifo: preempt unit test

This unit test covers most of the nvgpu.common.fifo.preempt module lines
and almost all branches.

Jira NVGPU-3698

Change-Id: I3960cd77c88126659e4d990f4d27dc43850f9ae4
Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2236730
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

userspace/units/fifo/preempt/nvgpu-preempt.h

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2019, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * 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 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.
+ */
+#ifndef UNIT_NVGPU_PREEMPT_H
+#define UNIT_NVGPU_PREEMPT_H
+
+#include <nvgpu/types.h>
+
+struct unit_module;
+struct gk20a;
+
+/** @addtogroup SWUTS-fifo-preempt
+ *  @{
+ *
+ * Software Unit Test Specification for fifo/preempt */
+
+/**
+ * Test specification for: test_preempt
+ *
+ * Description: Test TSG preempt.
+ *
+ * Test Type: Feature based
+ *
+ * Targets: nvgpu_preempt_channel
+ *
+ * Input: test_fifo_init_support
+ *
+ * Steps:
+ * - Test channel preempt with below cases:
+ *   - Channel bound to TSG: TSG is preempted.
+ *   - Independent channel, not bound to TSG.
+ *
+ * Output: Returns PASS if all branches gave expected results. FAIL otherwise.
+ */
+int test_preempt(struct unit_module *m, struct gk20a *g, void *args);
+
+/**
+ * Test specification for: test_preempt_poll_tsg_on_pbdma
+ *
+ * Description: Poll and preempt all TSGs serving PBDMA.
+ *
+ * Test Type: Feature based
+ *
+ * Targets: nvgpu_preempt_poll_tsg_on_pbdma
+ *
+ * Input: test_fifo_init_support
+ *
+ * Steps:
+ * - Go through list of TSGs serving PBDMAs and preempt the TSGs.
+ *
+ * Output: Returns PASS if all branches gave expected results. FAIL otherwise.
+ */
+int test_preempt_poll_tsg_on_pbdma(struct unit_module *m, struct gk20a *g,
+								void *args);
+
+/**
+ * Test specification for: test_preempt_get_timeout
+ *
+ * Description: Check GPU timeout value
+ *
+ * Test Type: Feature based
+ *
+ * Targets: nvgpu_preempt_get_timeout
+ *
+ * Input: test_fifo_init_support
+ *
+ * Steps:
+ * - GPU timeout value is not set in init. So, check if timeout value is 0.
+ *
+ * Output: Returns PASS if all branches gave expected results. FAIL otherwise.
+ */
+int test_preempt_get_timeout(struct unit_module *m, struct gk20a *g,
+								void *args);
+
+#endif /* UNIT_NVGPU_PREEMPT_H */