gpu: nvgpu: cast bvec test

Add BVEC tests for following functions:
nvgpu_safe_cast_u64_to_u32, nvgpu_safe_cast_u64_to_u16,
nvgpu_safe_cast_u64_to_u8, nvgpu_safe_cast_u64_to_s64,
nvgpu_safe_cast_u64_to_s32, nvgpu_safe_cast_s64_to_u64,
nvgpu_safe_cast_s64_to_u32, nvgpu_safe_cast_s64_to_s32,
nvgpu_safe_cast_u32_to_u16, nvgpu_safe_cast_u32_to_u8,
nvgpu_safe_cast_u32_to_s32, nvgpu_safe_cast_u32_to_s8,
nvgpu_safe_cast_s32_to_u64, nvgpu_safe_cast_s32_to_u32,
nvgpu_safe_cast_s8_to_u8, nvgpu_safe_cast_bool_to_u32

JIRA NVGPU-6412

Change-Id: Ic97e45051570a7133045de6cb4345c5f935cf9f6
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2555469
(cherry picked from commit be2ba5f1a7ead4c062eab74c7587c32797a651df)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2623637
Reviewed-by: Vaibhav Kachore <vkachore@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit

userspace/units/interface/static_analysis/static_analysis.h

@@ -122,7 +122,7 @@ int test_arithmetic(struct unit_module *m, struct gk20a *g, void *args);
  *
  * Description: Verify functionality of static analysis safe cast APIs.
  *
- * Test Type: Feature, Error guessing
+ * Test Type: Feature, Error guessing, Boundary Value
  *
  * Targets: nvgpu_safe_cast_u64_to_u32, nvgpu_safe_cast_u64_to_u16,
  *          nvgpu_safe_cast_u64_to_u8, nvgpu_safe_cast_u64_to_s64,
@@ -135,10 +135,60 @@ int test_arithmetic(struct unit_module *m, struct gk20a *g, void *args);
  *
  * Input: None
  *
+ * -# unsigned to unsigned cast tests:
+ *    Boundary values: {0, type2 max, type1 max}
+ *
+ *    Equivalence classes:
+ *    Variable: Cast input value.
+ *    - Valid tests: Cast result within range for each valid boundary value and
+ *                   random value [0, type2 max].
+ *    - Invalid tests: Cast result out of range if possible for each invalid
+ *                     boundary and random value [type2 max + 1, type1 max].
+ *
+ * -# unsigned to signed cast tests:
+ *    Boundary values: {type2 min, 0, type2 max, type1 max}
+ *
+ *    Equivalence classes:
+ *    Variable: Cast input value.
+ *    - Valid tests: Cast result within range for each valid boundary value and
+ *                   random value. [0, type2 max]
+ *    - Invalid tests: Cast result out of range if possible for each invalid
+ *                     boundary and random value. {[type2 min, -1], [type2 max + 1, type1 max]}
+ *
+ * -# signed to unsigned cast tests:
+ *    Boundary values: {type1 min, 0, type1 max}
+ *
+ *    Equivalence classes:
+ *    Variable: Cast input value.
+ *    - Valid tests: Cast result within range for each valid boundary value and
+ *                   random value. [0, type1 max]
+ *    - Invalid tests: Cast result out of range if possible for each invalid
+ *                     boundary and random value. [type1 min, -1]
+ *
+ * -# s64 to u32 cast tests:
+ *    Boundary values: {LONG_MIN, 0, U32_MAX, LONG_MAX}
+ *
+ *    Equivalence classes:
+ *    Variable: Cast input value.
+ *    - Valid tests: Cast result within range for each valid boundary value and
+ *                   random value. [0, U32_MAX]
+ *    - Invalid tests: Cast result out of range if possible for each invalid
+ *                     boundary and random value. {[LONG_MIN, -1], [U32_MAX + 1, LONG_MAX]}
+ *
+ * -# s64 to s32 cast tests:
+ *    Boundary values: {LONG_MIN, INT_MIN, 0, INT_MAX, LONG_MAX}
+ *
+ *    Equivalence classes:
+ *    Variable: Cast input value.
+ *    - Valid tests: Cast result within range for each valid boundary value and
+ *                   random value. [INT_MIN, INT_MAX]
+ *    - Invalid tests: Cast result out of range if possible for each invalid
+ *                     boundary and random value. {[LONG_MIN, INT_MIN - 1], [INT_MAX + 1, LONG_MAX]}
+ *
  * Steps:
- * - Call the static analysis arithmetic APIs. Pass in valid values and verify
+ * - Call the static analysis cast APIs. Pass in valid values and verify
  *   correct return.
- * - Call the static analysis arithmetic APIs. Pass in values beyond type range
+ * - Call the static analysis cast APIs. Pass in values beyond type range
  *   and use EXPECT_BUG() to verify BUG() is called.
  *
  * Output: Returns PASS if expected result is met, FAIL otherwise.