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/* Memory manager interface */
#include <stdio.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "libdha.h"
#include "kernelhelper/dhahelper.h"
static int libdha_fd=-1;
#define ALLOWED_VER 2
int bm_open( void )
{
int retv;
libdha_fd = open("/dev/dhahelper",O_RDWR);
retv = libdha_fd > 0 ? 0 : ENXIO;
if(!retv)
{
int ver;
ioctl(libdha_fd,DHAHELPER_GET_VERSION,&ver);
if(ver < ALLOWED_VER)
{
printf("libdha: You have wrong version (%i) of /dev/dhahelper\n"
"libdha: Please upgrade your driver up to ver=%i\n",ver,ALLOWED_VER);
retv = EINVAL;
close(libdha_fd);
}
}
else printf("libdha: Can't open /dev/dhahelper\n");
return retv;
}
void bm_close( void )
{
close(libdha_fd);
}
int bm_virt_to_phys( void * virt_addr, unsigned long length, unsigned long * parray )
{
dhahelper_vmi_t vmi;
vmi.virtaddr = virt_addr;
vmi.length = length;
vmi.realaddr = parray;
if(libdha_fd > 0) return ioctl(libdha_fd,DHAHELPER_VIRT_TO_PHYS,&vmi);
return ENXIO;
}
int bm_virt_to_bus( void * virt_addr, unsigned long length, unsigned long * barray )
{
dhahelper_vmi_t vmi;
vmi.virtaddr = virt_addr;
vmi.length = length;
vmi.realaddr = barray;
if(libdha_fd > 0) return ioctl(libdha_fd,DHAHELPER_VIRT_TO_BUS,&vmi);
return ENXIO;
}
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