/*
 * Copyright (c) 2012 embedded brains GmbH.  All rights reserved.
 *
 *  embedded brains GmbH
 *  Obere Lagerstr. 30
 *  82178 Puchheim
 *  Germany
 *  <rtems@embedded-brains.de>
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.com/license/LICENSE.
 */

#ifdef HAVE_CONFIG_H
  #include "config.h"
#endif

#include "tmacros.h"

#include <errno.h>
#include <string.h>

#include <rtems/blkdev.h>
#include <rtems/bdbuf.h>

#define BLOCK_COUNT 15

static int block_access_counts [BLOCK_COUNT];

static int expected_block_access_counts [BLOCK_COUNT] = {
  2, 0, 2, 0, 2, 0, 2, 2, 2, 0, 2, 0, 2, 0, 2
};

static const rtems_blkdev_bnum read_sequence [] = {
  0, 2, 4, 6, 8, 10, 12, 14, 7
};

static int test_disk_ioctl(rtems_disk_device *dd, uint32_t req, void *arg)
{
  int rv = 0;

  if (req == RTEMS_BLKIO_REQUEST) {
    rtems_blkdev_request *breq = arg;
    rtems_blkdev_sg_buffer *sg = breq->bufs;
    uint32_t i;

    rtems_test_assert(breq->req == RTEMS_BLKDEV_REQ_READ);

    for (i = 0; i < breq->bufnum; ++i) {
      rtems_blkdev_bnum block = sg [i].block;

      rtems_test_assert(block < BLOCK_COUNT);

      ++block_access_counts [block];
    }

    breq->req_done(breq->done_arg, RTEMS_SUCCESSFUL);
  } else {
    errno = EINVAL;
    rv = -1;
  }

  return rv;
}

static void do_read_sequence(rtems_disk_device *dd)
{
  size_t i;

  for (i = 0; i < sizeof(read_sequence) / sizeof(read_sequence [0]); ++i) {
    rtems_status_code sc;
    rtems_bdbuf_buffer *bd;

    sc = rtems_bdbuf_read(dd, read_sequence [i], &bd);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL);

    sc = rtems_bdbuf_release(bd);
    rtems_test_assert(sc == RTEMS_SUCCESSFUL);
  }
}

static void test(void)
{
  rtems_status_code sc;
  dev_t dev = 0;
  rtems_disk_device *dd;

  sc = rtems_disk_io_initialize();
  rtems_test_assert(sc == RTEMS_SUCCESSFUL);

  sc = rtems_disk_create_phys(
    dev,
    1,
    BLOCK_COUNT,
    test_disk_ioctl,
    NULL,
    NULL
  );
  rtems_test_assert(sc == RTEMS_SUCCESSFUL);

  dd = rtems_disk_obtain(dev);
  rtems_test_assert(dd != NULL);

  do_read_sequence(dd);
  rtems_bdbuf_purge_dev(dd);
  do_read_sequence(dd);

  rtems_test_assert(
    memcmp(
      block_access_counts,
      expected_block_access_counts,
      sizeof(block_access_counts)
    ) == 0
  );

  sc = rtems_disk_release(dd);
  rtems_test_assert(sc == RTEMS_SUCCESSFUL);

  sc = rtems_disk_delete(dev);
  rtems_test_assert(sc == RTEMS_SUCCESSFUL);
}

static void Init(rtems_task_argument arg)
{
  puts("\n\n*** TEST BLOCK 12 ***");

  test();

  puts("*** END OF TEST BLOCK 12 ***");

  rtems_test_exit(0);
}

#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_LIBBLOCK

#define CONFIGURE_BDBUF_BUFFER_MIN_SIZE 1
#define CONFIGURE_BDBUF_BUFFER_MAX_SIZE 1
#define CONFIGURE_BDBUF_CACHE_MEMORY_SIZE BLOCK_COUNT

#define CONFIGURE_USE_IMFS_AS_BASE_FILESYSTEM

#define CONFIGURE_MAXIMUM_TASKS 2

#define CONFIGURE_EXTRA_TASK_STACKS (8 * 1024)

#define CONFIGURE_RTEMS_INIT_TASKS_TABLE

#define CONFIGURE_INIT

#include <rtems/confdefs.h>