network support: libbsdport or rtems-libbsd for e1000 network chips on i386?

[Chris Johns]

On 29/10/16 1:14 pm, RMDerbes wrote:
> 
> I need to deploy rtems on a x86 host that has 2 Intel GbE network
> interfaces: I218 and I210.
> I'm a bit confused with rtems networking support, because there are the
> rtems-libbsd and the libbsdport projects
> in rtems git repo, although libbsdport sources are much older and only
> in Joel's repo.
> Which one may be use?

Use libbsd.

> It seems to me that drivers for these interfaces (I210 and I218) are
> implemented in rtems-libbsd/freebsd/sys/dev/e1000 folder,
> and I have built successfully a i386 BSP (disabling network support) and
> libbsd.
> I'm stuck now, I do not know how to initialize network using the drivers
> provided in libbsd, and, basically, how to use libbsd in my projects.
> I have not found any documentation about it

The following can be found in my debug server snaphots
(https://ftp.rtems.org/pub/rtems/people/chrisj/dbserver/).

I add to init.c (where I use confdefs.h):

 /*
  * Configure LibBSD.
  */
 #define RTEMS_BSD_CONFIG_DOMAIN_PAGE_MBUFS_SIZE (128 * 1024 * 1024)
 #define RTEMS_BSD_CONFIG_NET_PF_UNIX
 #define RTEMS_BSD_CONFIG_NET_IF_LAGG
 #define RTEMS_BSD_CONFIG_NET_IF_VLAN
 #define RTEMS_BSD_CONFIG_SERVICE_TELNETD
 #define RTEMS_BSD_CONFIG_BSP_CONFIG
 #define RTEMS_BSD_CONFIG_INIT

 #include <machine/rtems-bsd-config.h>

In main.c I have:

  printf("BSD Initialisation ...\n");

  rtems_bsd_initialize();

  r = rtems_bsd_run_etc_rc_conf(15, false);
  if (r < 0)
    fprintf(stderr, "error: loading BSD /etc/rc.conf failed: %s\n",
            strerror(errno));

and finally rc.conf contains:

 #
 # System initialisation.
 #
 hostname="p03"
 ifconfig_em0="inet 10.10.5.33 netmask 255.255.255.0"
 ifconfig_cgem0="inet 10.10.5.34 netmask 255.255.255.0"
 ifconfig_re0="inet 10.10.5.35 netmask 255.255.255.0"
 ifconfig_em1="DHCP"
 ifconfig_em2="DHCP"
 ifconfig_em3="DHCP"
 defaultrouter="10.10.5.1"

 # Services
 telnetd_enable="YES"

If you are not sure what the NIC's label is boot RTEMS and initailise
libbsd and see what it prints out when it detects the interfaces.

Chris