[Cryptech-Commits] [sw/libhal] 06/07: add bus performance test

[git at cryptech.is]

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paul at psgd.org pushed a commit to branch master
in repository sw/libhal.

commit 257033eb2bf3d9e63f2d8e5321605aa51ab172a1
Author: Paul Selkirk <paul at psgd.org>
Date:   Sat Oct 31 23:00:20 2015 -0400

    add bus performance test
---
 tests/GNUmakefile |   2 +-
 tests/test-bus.c  | 163 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 164 insertions(+), 1 deletion(-)

diff --git a/tests/GNUmakefile b/tests/GNUmakefile
index a1cd4b4..2361ede 100644
--- a/tests/GNUmakefile
+++ b/tests/GNUmakefile
@@ -27,7 +27,7 @@
 
 INC	= ../hal.h
 LIB	= ../libhal.a
-BIN	= test-aes-key-wrap test-hash test-pbkdf2 test-rsa test-ecdsa
+BIN	= test-aes-key-wrap test-hash test-pbkdf2 test-rsa test-ecdsa test-bus
 
 CFLAGS	= -g3 -Wall -fPIC -std=c99 -I..
 
diff --git a/tests/test-bus.c b/tests/test-bus.c
new file mode 100644
index 0000000..3af4dc9
--- /dev/null
+++ b/tests/test-bus.c
@@ -0,0 +1,163 @@
+/*
+ * test-bus.c
+ * ----------
+ * Test raw read/write performance across the EIM or FMC bus.
+ *
+ * Copyright (c) 2015, NORDUnet A/S All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the NORDUnet nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <assert.h>
+
+#include <sys/time.h>
+
+#include <hal.h>
+
+#define TEST_NUM_ROUNDS         2000000
+
+/*
+ * Sanity test - are the cores present, and can we get a random number?
+ */
+
+static int sanity(void)
+{
+    uint32_t rnd, data;
+    int n = 10;
+    hal_error_t err;
+
+    if (((err = hal_io_expected(BOARD_ADDR_NAME0, (const uint8_t *) NOVENA_BOARD_NAME0, 4)) != HAL_OK) ||
+        ((err = hal_io_expected(CSPRNG_ADDR_NAME0, (const uint8_t *) CSPRNG_NAME0, 4)) != HAL_OK)) {
+        printf("initialization failed (is the bitstream loaded?): %s\n",
+               hal_error_string(err));
+        return 1;
+    }
+
+    if ((err = hal_io_wait(CSPRNG_ADDR_STATUS, CSPRNG_STATUS_VALID, &n)) != HAL_OK) {
+        printf("waiting for CSPRNG: %s\n", hal_error_string(err));
+        return 1;
+    }
+    if ((err = hal_io_read(CSPRNG_ADDR_RANDOM, (uint8_t *) &rnd, sizeof(rnd))) != HAL_OK) {
+        printf("reading CSPRNG: %s\n", hal_error_string(err));
+        return 1;
+    }
+
+    if ((err = hal_io_write(BOARD_ADDR_DUMMY, (const uint8_t *) &rnd, sizeof(rnd))) != HAL_OK) {
+        printf("writing dummy: %s\n", hal_error_string(err));
+        return 1;
+    }
+    if ((err = hal_io_read(BOARD_ADDR_DUMMY, (uint8_t *) &data, sizeof(data))) != HAL_OK) {
+        printf("reading dummy: %s\n", hal_error_string(err));
+        return 1;
+    }
+
+    if (data != rnd) {
+        printf("Data bus fail: expected %08x, got %08x, diff %08x\n", rnd, data, data ^ rnd);
+        return 1;
+    }
+
+    return 0;
+}
+
+/*
+ * Time a test.
+ */
+
+static void _time_check(char *label, const struct timeval t0, const int err)
+{
+  struct timeval t;
+  float rounds;
+  gettimeofday(&t, NULL);
+  t.tv_sec -= t0.tv_sec;
+  t.tv_usec = t0.tv_usec;
+  if (t.tv_usec < 0) {
+    t.tv_usec += 1000000;
+    t.tv_sec  -= 1;
+  }
+  rounds = (float)TEST_NUM_ROUNDS/((float)t.tv_sec + ((float)t.tv_usec / 1000000));
+  printf("%s%lu.%06lu seconds, %u/sec\n", label, t.tv_sec, t.tv_usec, (unsigned)rounds);
+}
+
+#define time_check(_label_, _expr_)             \
+  do {                                          \
+    struct timeval _t;                          \
+    gettimeofday(&_t, NULL);                    \
+    int _err = (_expr_);                        \
+    _time_check(_label_, _t, _err);             \
+    err |= _err;                                \
+  } while (0)
+
+/*
+ * Read and write over and over again.
+ */
+
+static int test_read(void)
+{
+    uint32_t i, data;
+    hal_error_t err;
+
+    for (i = 0; i < TEST_NUM_ROUNDS; ++i) {
+        if ((err = hal_io_read(BOARD_ADDR_DUMMY, (uint8_t *) &data, sizeof(data))) != HAL_OK) {
+            printf("reading dummy: %s\n", hal_error_string(err));
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+static int test_write(void)
+{
+    uint32_t i;
+    hal_error_t err;
+
+    for (i = 0; i < TEST_NUM_ROUNDS; ++i) {
+        if ((err = hal_io_write(BOARD_ADDR_DUMMY, (const uint8_t *) &i, sizeof(i))) != HAL_OK) {
+            printf("writing dummy: %s\n", hal_error_string(err));
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+int main(void)
+{
+    int err = 0;
+
+    if (sanity() != 0)
+        return 1;
+
+    time_check("read  ", test_read());
+    time_check("write ", test_write());
+
+    return err;
+}