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Subject[PATCH v7 2/4] lib/test_bitmap.c: Add for_each_set_clump test cases
The introduction of the generic for_each_set_clump macro need test
cases to verify the implementation. This patch adds test cases for
scenarios in which clump sizes are 8 bits, 24 bits, 30 bits and 6 bits.
The cases contain situations where clump is getting split at the word
boundary and also when zeroes are present in the start and middle of
bitmap.

Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
---
Changes in v7:
- Minor changes: Use macro 'DECLARE_BITMAP()' and split 'struct'
definition and test data.

Changes in v6:
- Make 'for loop' inside 'test_for_each_set_clump' more succinct.

Changes in v5:
- No change.

Changes in v4:
- Use 'for' loop in test function of 'for_each_set_clump'.

Changes in v3:
- No Change.

Changes in v2:
- Unify different tests for 'for_each_set_clump'. Pass test data as
function parameters.
- Remove unnecessary bitmap_zero calls.

lib/test_bitmap.c | 144 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 144 insertions(+)

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 6b13150667f5..31b3cd920c93 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -155,6 +155,38 @@ static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
return true;
}

+static bool __init __check_eq_clump(const char *srcfile, unsigned int line,
+ const unsigned int offset,
+ const unsigned int size,
+ const unsigned long *const clump_exp,
+ const unsigned long *const clump,
+ const unsigned long clump_size)
+{
+ unsigned long exp;
+
+ if (offset >= size) {
+ pr_warn("[%s:%u] bit offset for clump out-of-bounds: expected less than %u, got %u\n",
+ srcfile, line, size, offset);
+ return false;
+ }
+
+ exp = clump_exp[offset / clump_size];
+ if (!exp) {
+ pr_warn("[%s:%u] bit offset for zero clump: expected nonzero clump, got bit offset %u with clump value 0",
+ srcfile, line, offset);
+ return false;
+ }
+
+ if (*clump != exp) {
+ pr_warn("[%s:%u] expected clump value of 0x%lX, got clump value of 0x%lX",
+ srcfile, line, exp, *clump);
+ return false;
+ }
+
+ return true;
+}
+
+
#define __expect_eq(suffix, ...) \
({ \
int result = 0; \
@@ -172,6 +204,7 @@ static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
#define expect_eq_pbl(...) __expect_eq(pbl, ##__VA_ARGS__)
#define expect_eq_u32_array(...) __expect_eq(u32_array, ##__VA_ARGS__)
#define expect_eq_clump8(...) __expect_eq(clump8, ##__VA_ARGS__)
+#define expect_eq_clump(...) __expect_eq(clump, ##__VA_ARGS__)

static void __init test_zero_clear(void)
{
@@ -577,6 +610,28 @@ static void noinline __init test_mem_optimisations(void)
}
}

+static const unsigned long clump_bitmap_data[] __initconst = {
+ 0x38000201,
+ 0x05ff0f38,
+ 0xeffedcba,
+ 0xbbbbabcd,
+ 0x000000aa,
+ 0x000000aa,
+ 0x00ff0000,
+ 0xaaaaaa00,
+ 0xff000000,
+ 0x00aa0000,
+ 0x00000000,
+ 0x00000000,
+ 0x00000000,
+ 0x0f000000,
+ 0x00ff0000,
+ 0xaaaaaa00,
+ 0xff000000,
+ 0x00aa0000,
+ 0x00000ac0,
+};
+
static const unsigned char clump_exp[] __initconst = {
0x01, /* 1 bit set */
0x02, /* non-edge 1 bit set */
@@ -588,6 +643,94 @@ static const unsigned char clump_exp[] __initconst = {
0x05, /* non-adjacent 2 bits set */
};

+static const unsigned long clump_exp1[] __initconst = {
+ 0x01, /* 1 bit set */
+ 0x02, /* non-edge 1 bit set */
+ 0x00, /* zero bits set */
+ 0x38, /* 3 bits set across 4-bit boundary */
+ 0x38, /* Repeated clump */
+ 0x0F, /* 4 bits set */
+ 0xFF, /* all bits set */
+ 0x05, /* non-adjacent 2 bits set */
+};
+
+static const unsigned long clump_exp2[] __initconst = {
+ 0xfedcba, /* 24 bits */
+ 0xabcdef,
+ 0xaabbbb, /* Clump split between 2 words */
+ 0x000000, /* zeroes in between */
+ 0x0000aa,
+ 0x000000,
+ 0x0000ff,
+ 0xaaaaaa,
+ 0x000000,
+ 0x0000ff,
+};
+
+static const unsigned long clump_exp3[] __initconst = {
+ 0x00000000, /* starting with 0s*/
+ 0x00000000, /* All 0s */
+ 0x00000000,
+ 0x00000000,
+ 0x3f00000f, /* Non zero set */
+ 0x2aa80003,
+ 0x00000aaa,
+ 0x00003fc0,
+};
+
+static const unsigned long clump_exp4[] __initconst = {
+ 0x00,
+ 0x2b,
+};
+
+struct clump_test_data_params {
+ DECLARE_BITMAP(data, 256);
+ unsigned long count;
+ unsigned long offset;
+ unsigned long limit;
+ unsigned long clump_size;
+ unsigned long const *exp;
+};
+
+struct clump_test_data_params clump_test_data[] = { {{0}, 2, 0, 64, 8, clump_exp1},
+ {{0}, 8, 2, 240, 24, clump_exp2},
+ {{0}, 8, 10, 240, 30, clump_exp3},
+ {{0}, 1, 18, 18, 6, clump_exp4} };
+
+static void __init prepare_test_data(unsigned int index)
+{
+ int i;
+ unsigned long width = 0;
+
+ for(i = 0; i < clump_test_data[index].count; i++)
+ {
+ bitmap_set_value(clump_test_data[index].data,
+ clump_bitmap_data[(clump_test_data[index].offset)++], width, 32);
+ width += 32;
+ }
+}
+
+static void __init execute_for_each_set_clump_test(unsigned int index)
+{
+ unsigned long start, clump;
+
+ for_each_set_clump(start, clump, clump_test_data[index].data,
+ clump_test_data[index].limit,
+ clump_test_data[index].clump_size)
+ expect_eq_clump(start, clump_test_data[index].limit, clump_test_data[index].exp,
+ &clump, clump_test_data[index].clump_size);
+}
+
+static void __init test_for_each_set_clump(void)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(clump_test_data); i++) {
+ prepare_test_data(i);
+ execute_for_each_set_clump_test(i);
+ }
+}
+
static void __init test_for_each_set_clump8(void)
{
#define CLUMP_EXP_NUMBITS 64
@@ -623,6 +766,7 @@ static void __init selftest(void)
test_bitmap_parselist_user();
test_mem_optimisations();
test_for_each_set_clump8();
+ test_for_each_set_clump();
}

KSTM_MODULE_LOADERS(test_bitmap);
--
2.26.2
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