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/* SPDX-License-Identifier: Apache-2.0
* Copyright(c) 2021 Cisco Systems, Inc.
*/
#include <vppinfra/format.h>
#include <vppinfra/test/test.h>
#include <vppinfra/vector/ip_csum.h>
typedef struct
{
struct
{
u8 *src;
u32 count;
} chunk[5];
u16 result;
} ip_csum_test_t;
static u8 test1[] = { 0x45, 0x00, 0x00, 0x73, 0x00, 0x00, 0x40,
0x00, 0x40, 0x11, 0x00, 0x00, 0xc0, 0xa8,
0x00, 0x01, 0xc0, 0xa8, 0x00, 0xc7, 0x00 };
#define TEST_LEN(x) (ARRAY_LEN (x) - 1)
static ip_csum_test_t tests[] = { {
.chunk[0].src = test1,
.chunk[0].count = TEST_LEN (test1),
.result = 0x61b8,
},
{
.chunk[0].src = test1,
.chunk[0].count = 1,
.chunk[1].src = test1 + 1,
.chunk[1].count = 2,
.chunk[2].src = test1 + 3,
.chunk[2].count = 3,
.chunk[3].src = test1 + 6,
.chunk[3].count = 4,
.chunk[4].src = test1 + 10,
.chunk[4].count = TEST_LEN (test1) - 10,
.result = 0x61b8,
},
{
.chunk[0].count = 1,
.result = 0xff0f,
},
{
.chunk[0].count = 2,
.result = 0x080f,
},
{
.chunk[0].count = 3,
.result = 0x0711,
},
{
.chunk[0].count = 4,
.result = 0x1210,
},
{
.chunk[0].count = 63,
.result = 0xda01,
},
{
.chunk[0].count = 64,
.result = 0xe100,
},
{
.chunk[0].count = 65,
.result = 0xe010,
},
{
.chunk[0].count = 65535,
.result = 0xfc84,
},
{
.chunk[0].count = 65536,
.result = 0xffff,
} };
static clib_error_t *
test_clib_ip_csum (clib_error_t *err)
{
u8 *buf;
buf = test_mem_alloc (65536);
for (int i = 0; i < 65536; i++)
buf[i] = 0xf0 + ((i * 7) & 0xf);
for (int i = 0; i < ARRAY_LEN (tests); i++)
{
clib_ip_csum_t c = {};
ip_csum_test_t *t = tests + i;
u16 rv;
for (int j = 0; j < ARRAY_LEN (((ip_csum_test_t *) 0)->chunk); j++)
if (t->chunk[j].count > 0)
{
if (t->chunk[j].src == 0)
clib_ip_csum_chunk (&c, buf, t->chunk[j].count);
else
clib_ip_csum_chunk (&c, t->chunk[j].src, t->chunk[j].count);
}
rv = clib_ip_csum_fold (&c);
if (rv != tests[i].result)
{
err = clib_error_return (err,
"bad checksum in test case %u (expected "
"0x%04x, calculated 0x%04x)",
i, tests[i].result, rv);
goto done;
}
}
done:
return err;
}
void __test_perf_fn
perftest_ip4_hdr (test_perf_t *tp)
{
u32 n = tp->n_ops;
u8 *data = test_mem_alloc_and_splat (20, n, (void *) &test1);
u16 *res = test_mem_alloc (n * sizeof (u16));
test_perf_event_enable (tp);
for (int i = 0; i < n; i++)
res[i] = clib_ip_csum (data + i * 20, 20);
test_perf_event_disable (tp);
}
void __test_perf_fn
perftest_tcp_payload (test_perf_t *tp)
{
u32 n = tp->n_ops;
volatile uword *lenp = &tp->arg0;
u8 *data = test_mem_alloc_and_splat (20, n, (void *) &test1);
u16 *res = test_mem_alloc (n * sizeof (u16));
test_perf_event_enable (tp);
for (int i = 0; i < n; i++)
res[i] = clib_ip_csum (data + i * lenp[0], lenp[0]);
test_perf_event_disable (tp);
}
void __test_perf_fn
perftest_byte (test_perf_t *tp)
{
volatile uword *np = &tp->n_ops;
u8 *data = test_mem_alloc_and_fill_inc_u8 (*np, 0, 0);
u16 *res = test_mem_alloc (sizeof (u16));
test_perf_event_enable (tp);
res[0] = clib_ip_csum (data, np[0]);
test_perf_event_disable (tp);
}
REGISTER_TEST (clib_ip_csum) = {
.name = "clib_ip_csum",
.fn = test_clib_ip_csum,
.perf_tests = PERF_TESTS (
{ .name = "fixed size (per IPv4 Header)",
.n_ops = 1024,
.fn = perftest_ip4_hdr },
{ .name = "fixed size (per 1460 byte block)",
.n_ops = 16,
.arg0 = 1460,
.fn = perftest_tcp_payload },
{ .name = "variable size (per byte)", .n_ops = 16384, .fn = perftest_byte }
),
};
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