Issue creating multiple nvdisk devices – second device fails to initialize

General
1 
#include <rtems.h>
#include <rtems/shell.h>
#include <rtems/nvdisk.h>
#include <rtems/nvdisk-sram.h>
#include <stdlib.h>
#include <stdio.h>

rtems_nvdisk_device_desc rtems_nv_heap_device_descriptor[] =
{
  {
    .flags  = 0,
    .base   = 0,
    .size   = 1024 * 1024,
    .nv_ops = &rtems_nvdisk_sram_handlers
  },
  {
    .flags  = 0,
    .base   = 0,
    .size   = 1024 * 1024,
    .nv_ops = &rtems_nvdisk_sram_handlers
  }
};

const rtems_nvdisk_config rtems_nvdisk_configuration[] =
{
  {
    .block_size   = 512,
    .device_count = 2,
    .devices      = rtems_nv_heap_device_descriptor,
    .flags        = 0,
    .info_level   = 1
  }
};

uint32_t rtems_nvdisk_configuration_size = 1;
static int create_nvdisk(void){
  rtems_status_code         sc;
  for (uint32_t i = 0; i < rtems_nvdisk_configuration[0].device_count; ++i)
  {
    rtems_nv_heap_device_descriptor[i].base =
      malloc (rtems_nv_heap_device_descriptor[i].size);
    printf("nvdisk created\n");
    if (!rtems_nv_heap_device_descriptor[i].base)
    {
      printf ("error: no memory for NV disk %u\n", i);
      return 1;
    }
    printf("NV disk %u memory allocated (%u bytes)\n",
           i, rtems_nv_heap_device_descriptor[i].size);
  }
  for (uint32_t i = 0; i < rtems_nvdisk_configuration[0].device_count; ++i) {
    rtems_status_code sc = rtems_nvdisk_initialize(i, 0, NULL);
    if (sc != RTEMS_SUCCESSFUL) {
      printf("error: nvdisk driver not initialised for device %u: %s\n",
             i, rtems_status_text(sc));
    } else {
      printf("nvdisk %u initialized successfully\n", i);
    }
  }
  printf ("successful\n");
  return 0;
}

static rtems_task Init(
  rtems_task_argument ignored)
{
  (void) ignored;
  create_nvdisk();
  rtems_shell_init(
    "SHLL",
    RTEMS_MINIMUM_STACK_SIZE * 4,
    100,
    "/dev/console",
    false,
    true,
    NULL
  );

  rtems_task_exit();
}

#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER

#define CONFIGURE_MAXIMUM_TASKS            10
#define CONFIGURE_MAXIMUM_DRIVERS          50
#define CONFIGURE_SHELL_COMMANDS_INIT
#define CONFIGURE_SHELL_COMMANDS_ALL
#define CONFIGURE_MAXIMUM_FILE_DESCRIPTORS 50
#define CONFIGURE_APPLICATION_NEEDS_LIBBLOCK
#define CONFIGURE_MAXIMUM_BLOCK_DEVICES 8
#define CONFIGURE_HEAP_SIZE                (10*1024*1024)
#define CONFIGURE_POSIX_INIT
#define CONFIGURE_MAXIMUM_POSIX_THREADS         5
#define CONFIGURE_MAXIMUM_POSIX_KEYS            16

#define CONFIGURE_RTEMS_INIT_TASKS_TABLE

#define CONFIGURE_INIT_TASK_ATTRIBUTES RTEMS_FLOATING_POINT

#define CONFIGURE_INIT
#include <rtems/confdefs.h>
#include <rtems/shellconfig.h>

i am trying to create multiple nvdisk device and i am getting this error

prakhar@pop-os:~/rtems-mr/app/hello$ qemu-system-sparc   -M leon3_generic   -nographic   -kernel build/sparc-rtems7-leon3/my_shell.exe
nvdisk created
NV disk 0 memory allocated (1048576 bytes)
nvdisk created
NV disk 1 memory allocated (1048576 bytes)
nvdisk 0 initialized successfully
nvdisk:error:disk create phy failed
error: nvdisk driver not initialised for device 1: RTEMS_UNSATISFIED
successful

RTEMS Shell on /dev/console. Use 'help' to list commands.
SHLL [/] # ls -la dev
total 4080
crwxr-xr-x  1 root  root           0,         0 Jan  1 00:00 console
brwxr-xr-x  1 root  root  2147483648, 538234544 Jan  1 00:00 nvda

what am i doing wrong here or this is the limitation ?
anyone’s help would be highly appreciated

2

if you look at rtems_nvdisk_initialize() you can see that it is initializing the rtems_nvdisk_configuration variable in the global namespace. It will attempt to initialize all the devices itself, and it doesn’t look like the initialize is intended to be called multiple times.

3

Yes actually I was able to figure that out but I forgot to mention it here.
Thank you for the reply.