diff options
Diffstat (limited to 'lib/checksum_kunit.c')
| -rw-r--r-- | lib/checksum_kunit.c | 54 |
1 files changed, 38 insertions, 16 deletions
diff --git a/lib/checksum_kunit.c b/lib/checksum_kunit.c index ace3c4799fe1..0eed92b77ba3 100644 --- a/lib/checksum_kunit.c +++ b/lib/checksum_kunit.c @@ -10,7 +10,8 @@ #define MAX_ALIGN 64 #define TEST_BUFLEN (MAX_LEN + MAX_ALIGN) -static const __wsum random_init_sum = 0x2847aab; +/* Values for a little endian CPU. Byte swap each half on big endian CPU. */ +static const u32 random_init_sum = 0x2847aab; static const u8 random_buf[] = { 0xac, 0xd7, 0x76, 0x69, 0x6e, 0xf2, 0x93, 0x2c, 0x1f, 0xe0, 0xde, 0x86, 0x8f, 0x54, 0x33, 0x90, 0x95, 0xbf, 0xff, 0xb9, 0xea, 0x62, 0x6e, 0xb5, @@ -56,7 +57,9 @@ static const u8 random_buf[] = { 0xe1, 0xdf, 0x4b, 0xe1, 0x81, 0xe2, 0x17, 0x02, 0x7b, 0x58, 0x8b, 0x92, 0x1a, 0xac, 0x46, 0xdd, 0x2e, 0xce, 0x40, 0x09 }; -static const __sum16 expected_results[] = { + +/* Values for a little endian CPU. Byte swap on big endian CPU. */ +static const u16 expected_results[] = { 0x82d0, 0x8224, 0xab23, 0xaaad, 0x41ad, 0x413f, 0x4f3e, 0x4eab, 0x22ab, 0x228c, 0x428b, 0x41ad, 0xbbac, 0xbb1d, 0x671d, 0x66ea, 0xd6e9, 0xd654, 0x1754, 0x1655, 0x5d54, 0x5c6a, 0xfa69, 0xf9fb, 0x44fb, 0x4428, 0xf527, @@ -115,7 +118,9 @@ static const __sum16 expected_results[] = { 0x1d47, 0x3c46, 0x3bc5, 0x59c4, 0x59ad, 0x57ad, 0x5732, 0xff31, 0xfea6, 0x6ca6, 0x6c8c, 0xc08b, 0xc045, 0xe344, 0xe316, 0x1516, 0x14d6, }; -static const __wsum init_sums_no_overflow[] = { + +/* Values for a little endian CPU. Byte swap each half on big endian CPU. */ +static const u32 init_sums_no_overflow[] = { 0xffffffff, 0xfffffffb, 0xfffffbfb, 0xfffffbf7, 0xfffff7f7, 0xfffff7f3, 0xfffff3f3, 0xfffff3ef, 0xffffefef, 0xffffefeb, 0xffffebeb, 0xffffebe7, 0xffffe7e7, 0xffffe7e3, 0xffffe3e3, 0xffffe3df, 0xffffdfdf, 0xffffdfdb, @@ -208,7 +213,21 @@ static u8 tmp_buf[TEST_BUFLEN]; #define full_csum(buff, len, sum) csum_fold(csum_partial(buff, len, sum)) -#define CHECK_EQ(lhs, rhs) KUNIT_ASSERT_EQ(test, lhs, rhs) +#define CHECK_EQ(lhs, rhs) KUNIT_ASSERT_EQ(test, (__force u64)lhs, (__force u64)rhs) + +static __sum16 to_sum16(u16 x) +{ + return (__force __sum16)le16_to_cpu((__force __le16)x); +} + +/* This function swaps the bytes inside each half of a __wsum */ +static __wsum to_wsum(u32 x) +{ + u16 hi = le16_to_cpu((__force __le16)(x >> 16)); + u16 lo = le16_to_cpu((__force __le16)x); + + return (__force __wsum)((hi << 16) | lo); +} static void assert_setup_correct(struct kunit *test) { @@ -226,7 +245,8 @@ static void assert_setup_correct(struct kunit *test) static void test_csum_fixed_random_inputs(struct kunit *test) { int len, align; - __wsum result, expec, sum; + __wsum sum; + __sum16 result, expec; assert_setup_correct(test); for (align = 0; align < TEST_BUFLEN; ++align) { @@ -237,9 +257,9 @@ static void test_csum_fixed_random_inputs(struct kunit *test) /* * Test the precomputed random input. */ - sum = random_init_sum; + sum = to_wsum(random_init_sum); result = full_csum(&tmp_buf[align], len, sum); - expec = expected_results[len]; + expec = to_sum16(expected_results[len]); CHECK_EQ(result, expec); } } @@ -251,7 +271,8 @@ static void test_csum_fixed_random_inputs(struct kunit *test) static void test_csum_all_carry_inputs(struct kunit *test) { int len, align; - __wsum result, expec, sum; + __wsum sum; + __sum16 result, expec; assert_setup_correct(test); memset(tmp_buf, 0xff, TEST_BUFLEN); @@ -261,9 +282,9 @@ static void test_csum_all_carry_inputs(struct kunit *test) /* * All carries from input and initial sum. */ - sum = 0xffffffff; + sum = to_wsum(0xffffffff); result = full_csum(&tmp_buf[align], len, sum); - expec = (len & 1) ? 0xff00 : 0; + expec = to_sum16((len & 1) ? 0xff00 : 0); CHECK_EQ(result, expec); /* @@ -272,11 +293,11 @@ static void test_csum_all_carry_inputs(struct kunit *test) sum = 0; result = full_csum(&tmp_buf[align], len, sum); if (len & 1) - expec = 0xff00; + expec = to_sum16(0xff00); else if (len) expec = 0; else - expec = 0xffff; + expec = to_sum16(0xffff); CHECK_EQ(result, expec); } } @@ -290,7 +311,8 @@ static void test_csum_all_carry_inputs(struct kunit *test) static void test_csum_no_carry_inputs(struct kunit *test) { int len, align; - __wsum result, expec, sum; + __wsum sum; + __sum16 result, expec; assert_setup_correct(test); memset(tmp_buf, 0x4, TEST_BUFLEN); @@ -300,7 +322,7 @@ static void test_csum_no_carry_inputs(struct kunit *test) /* * Expect no carries. */ - sum = init_sums_no_overflow[len]; + sum = to_wsum(init_sums_no_overflow[len]); result = full_csum(&tmp_buf[align], len, sum); expec = 0; CHECK_EQ(result, expec); @@ -308,9 +330,9 @@ static void test_csum_no_carry_inputs(struct kunit *test) /* * Expect one carry. */ - sum = init_sums_no_overflow[len] + 1; + sum = to_wsum(init_sums_no_overflow[len] + 1); result = full_csum(&tmp_buf[align], len, sum); - expec = len ? 0xfffe : 0xffff; + expec = to_sum16(len ? 0xfffe : 0xffff); CHECK_EQ(result, expec); } } |