Add general block device tests

Author: theamirocohen

features/storage/TESTS/blockdevice/general_block_device/README.md

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+# Getting started with the Mbed OS block device test
+
+Mbed OS block device test is used to test exsiting and new block devices.
+
+You can find more information about the Mbed OS block device and other related pieces of the Mbed OS storage stack [in the storage overview](https://os.mbed.com/docs/latest/reference/storage.html).
+
+**Table of contents:**
+
+1. [Hardware requirements](#hardware-requirements)
+1. [Usage](#usage)
+   - [Compile the test](#compile-the-test)
+   - [Run the test](#run-the-test)
+1. [Changing the block device](#changing-the-block-device)
+1. [Tested configurations](#tested-configurations)
+
+## Hardware requirements
+
+This test uses a block device as storage. This can be either an external
+block device (one of SPI flash, DataFlash or an SD card) or simulated on a
+heap block device on boards with enough RAM.
+
+## Usage
+
+#### Compile the test
+
+Invoke `mbed test`, and specify the name of your platform and your favorite
+toolchain (`GCC_ARM`, `ARM`, `IAR`). For example, for the ARM Compiler 5:
+
+```
+mbed test -m K64F -t ARM -n mbed-os-features-storage-tests-blockdevice-general_block_device --compile
+```
+
+#### Run the example
+
+Use `mbed test` again:
+
+```
+mbed test -m K64F -t ARM -n mbed-os-features-storage-tests-blockdevice-general_block_device --run
+```
+   
+#### Troubleshooting
+
+If you have problems, you can review the [documentation](https://os.mbed.com/docs/latest/tutorials/debugging.html)
+for suggestions on what could be wrong and how to fix it.
+
+## Changing the block device
+
+In Mbed OS, a C++ classes that inherits from the [BlockDevice](https://os.mbed.com/docs/latest/reference/storage.html#block-devices)
+interface represents each block device. 
+This test uses the default block device received by the function get_default_instance(), it is defined in [SystemStorage.cpp](https://github.com/ARMmbed/mbed-os/blob/master/features/storage/system_storage/SystemStorage.cpp#L35-L77) as MBED_WEAK, in case we would like to test a new block device we will have to override it.
+
+first add the new block device cpp and header files to [blockdevice folder](https://github.com/ARMmbed/mbed-os/tree/master/features/storage/blockdevice), then implement get_default_instance() inside the test main.cpp.
+
+for example, in order to test the HeapBlockDevice add:
+
+``` diff
++#define TEST_BLOCK_SIZE 128
++#define TEST_BLOCK_DEVICE_SIZE 32*TEST_BLOCK_SIZE
+
++BlockDevice *BlockDevice::get_default_instance()
++{
++    utest_printf("NEW test block device!!!\n");
++    static HeapBlockDevice default_bd(TEST_BLOCK_DEVICE_SIZE, TEST_BLOCK_SIZE);
++    return &default_bd;
++}
+```
+
+Now you can recompile and run.
+
+## Tested configurations
+
+- K64F + SD
+- K64F + Heap
+- K82F + SPIF
+- K82F + Heap

features/storage/TESTS/blockdevice/general_block_device/main.cpp

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+/* mbed Microcontroller Library
+ * Copyright (c) 2018 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+#include "mbed_trace.h"
+#include <stdlib.h>
+
+using namespace utest::v1;
+
+#define TEST_BLOCK_COUNT 10
+#define TEST_ERROR_MASK 16
+#define TEST_NUM_OF_THREADS 5
+
+const struct {
+    const char *name;
+    bd_size_t (BlockDevice::*method)() const;
+} ATTRS[] = {
+    {"read size",    &BlockDevice::get_read_size},
+    {"program size", &BlockDevice::get_program_size},
+    {"erase size",   &BlockDevice::get_erase_size},
+    {"total size",   &BlockDevice::size},
+};
+
+static SingletonPtr<PlatformMutex> _mutex;
+
+// Mutex is protecting rand() per srand for buffer writing and verification.
+// Mutex is also protecting printouts for clear logs.
+// Mutex is NOT protecting Block Device actions: erase/program/read - which is the purpose of the multithreaded test!
+void basic_erase_program_read_test(BlockDevice *block_device, bd_size_t block_size, uint8_t *write_block,
+                                   uint8_t *read_block, unsigned addrwidth)
+{
+    int err = 0;
+    _mutex->lock();
+    // Find a random block
+    bd_addr_t block = (rand() * block_size) % (block_device->size());
+
+    // Use next random number as temporary seed to keep
+    // the address progressing in the pseudorandom sequence
+    unsigned seed = rand();
+
+    // Fill with random sequence
+    srand(seed);
+    for (bd_size_t i_ind = 0; i_ind < block_size; i_ind++) {
+        write_block[i_ind] = 0xff & rand();
+    }
+    // Write, sync, and read the block
+    utest_printf("\ntest  %0*llx:%llu...", addrwidth, block, block_size);
+    _mutex->unlock();
+
+    err = block_device->erase(block, block_size);
+    TEST_ASSERT_EQUAL(0, err);
+
+    err = block_device->program(write_block, block, block_size);
+    TEST_ASSERT_EQUAL(0, err);
+
+    err = block_device->read(read_block, block, block_size);
+    TEST_ASSERT_EQUAL(0, err);
+
+    _mutex->lock();
+    // Check that the data was unmodified
+    srand(seed);
+    int val_rand;
+    for (bd_size_t i_ind = 0; i_ind < block_size; i_ind++) {
+        val_rand = rand();
+        if ( (0xff & val_rand) != read_block[i_ind] ) {
+            utest_printf("\n Assert Failed Buf Read - block:size: %llx:%llu \n", block, block_size);
+            utest_printf("\n pos: %llu, exp: %02x, act: %02x, wrt: %02x \n", i_ind, (0xff & val_rand), read_block[i_ind],
+                         write_block[i_ind] );
+        }
+        TEST_ASSERT_EQUAL(0xff & val_rand, read_block[i_ind]);
+    }
+    _mutex->unlock();
+}
+
+void test_random_program_read_erase()
+{
+    utest_printf("\nTest Random Program Read Erase Starts..\n");
+
+    BlockDevice *block_device = BlockDevice::get_default_instance();
+
+    int err = block_device->init();
+    TEST_ASSERT_EQUAL(0, err);
+
+    for (unsigned atr = 0; atr < sizeof(ATTRS) / sizeof(ATTRS[0]); atr++) {
+        static const char *prefixes[] = {"", "k", "M", "G"};
+        for (int i_ind = 3; i_ind >= 0; i_ind--) {
+            bd_size_t size = (block_device->*ATTRS[atr].method)();
+            if (size >= (1ULL << 10 * i_ind)) {
+                utest_printf("%s: %llu%sbytes (%llubytes)\n",
+                             ATTRS[atr].name, size >> 10 * i_ind, prefixes[i_ind], size);
+                break;
+            }
+        }
+    }
+
+    bd_size_t block_size = block_device->get_erase_size();
+    unsigned addrwidth = ceil(log(float(block_device->size() - 1)) / log(float(16))) + 1;
+
+    uint8_t *write_block = new (std::nothrow) uint8_t[block_size];
+    uint8_t *read_block = new (std::nothrow) uint8_t[block_size];
+    if (!write_block || !read_block) {
+        utest_printf("\n Not enough memory for test");
+        goto end;
+    }
+
+    for (int b = 0; b < TEST_BLOCK_COUNT; b++) {
+        basic_erase_program_read_test(block_device, block_size, write_block, read_block, addrwidth);
+    }
+
+    err = block_device->deinit();
+    TEST_ASSERT_EQUAL(0, err);
+
+end:
+    delete[] write_block;
+    delete[] read_block;
+}
+
+static void test_thread_job(void *block_device_ptr)
+{
+    static int thread_num = 0;
+    thread_num++;
+    BlockDevice *block_device = (BlockDevice *)block_device_ptr;
+
+    bd_size_t block_size = block_device->get_erase_size();
+    unsigned addrwidth = ceil(log(float(block_device->size() - 1)) / log(float(16))) + 1;
+
+    uint8_t *write_block = new (std::nothrow) uint8_t[block_size];
+    uint8_t *read_block = new (std::nothrow) uint8_t[block_size];
+
+    if (!write_block || !read_block ) {
+        utest_printf("\n Not enough memory for test");
+        goto end;
+    }
+
+    for (int b = 0; b < TEST_BLOCK_COUNT; b++) {
+        basic_erase_program_read_test(block_device, block_size, write_block, read_block, addrwidth);
+    }
+
+end:
+    delete[] write_block;
+    delete[] read_block;
+}
+
+void test_multi_threads()
+{
+    utest_printf("\nTest Multi Threaded Erase/Program/Read Starts..\n");
+
+    BlockDevice *block_device = BlockDevice::get_default_instance();
+
+    int err = block_device->init();
+    TEST_ASSERT_EQUAL(0, err);
+
+    for (unsigned atr = 0; atr < sizeof(ATTRS) / sizeof(ATTRS[0]); atr++) {
+        static const char *prefixes[] = {"", "k", "M", "G"};
+        for (int i_ind = 3; i_ind >= 0; i_ind--) {
+            bd_size_t size = (block_device->*ATTRS[atr].method)();
+            if (size >= (1ULL << 10 * i_ind)) {
+                utest_printf("%s: %llu%sbytes (%llubytes)\n",
+                             ATTRS[atr].name, size >> 10 * i_ind, prefixes[i_ind], size);
+                break;
+            }
+        }
+    }
+
+    rtos::Thread bd_thread[TEST_NUM_OF_THREADS];
+
+    osStatus threadStatus;
+    int i_ind;
+
+    for (i_ind = 0; i_ind < TEST_NUM_OF_THREADS; i_ind++) {
+        threadStatus = bd_thread[i_ind].start(callback(test_thread_job, (void *)block_device));
+        if (threadStatus != 0) {
+            utest_printf("\n Thread %d Start Failed!", i_ind + 1);
+        }
+    }
+
+    for (i_ind = 0; i_ind < TEST_NUM_OF_THREADS; i_ind++) {
+        bd_thread[i_ind].join();
+    }
+
+    err = block_device->deinit();
+    TEST_ASSERT_EQUAL(0, err);
+}
+
+
+// Test setup
+utest::v1::status_t test_setup(const size_t number_of_cases)
+{
+    GREENTEA_SETUP(60, "default_auto");
+    return verbose_test_setup_handler(number_of_cases);
+}
+
+Case cases[] = {
+    Case("Testing read write random blocks", test_random_program_read_erase),
+    Case("Testing Multi Threads Erase Program Read", test_multi_threads)
+};
+
+Specification specification(test_setup, cases);
+
+int main()
+{
+    //mbed_trace_init();
+    utest_printf("MAIN STARTS\n");
+    return !Harness::run(specification);
+}