/*----------------------- Privcmd char device methods ------------------------*/
static int
privcmd_mmap_single(struct cdev *cdev, vm_ooffset_t *offset, vm_size_t size,
vm_object_t *object, int nprot)
{
struct privcmd_map *map;
map = malloc(sizeof(*map), M_PRIVCMD, M_WAITOK | M_ZERO);
map->size = OFF_TO_IDX(size);
map->pseudo_phys_res_id = 0;
map->pseudo_phys_res = xenmem_alloc(privcmd_dev,
&map->pseudo_phys_res_id, size);
if (map->pseudo_phys_res == NULL) {
free(map, M_PRIVCMD);
return (ENOMEM);
}
map->phys_base_addr = rman_get_start(map->pseudo_phys_res);
map->mem = cdev_pager_allocate(map, OBJT_MGTDEVICE, &privcmd_pg_ops,
size, nprot, *offset, NULL);
if (map->mem == NULL) {
xenmem_free(privcmd_dev, map->pseudo_phys_res_id,
map->pseudo_phys_res);
free(map, M_PRIVCMD);
return (ENOMEM);
}
*object = map->mem;
return (0);
}
int
gnttab_resume(device_t dev)
{
unsigned int max_nr_gframes, nr_gframes;
nr_gframes = nr_grant_frames;
max_nr_gframes = max_nr_grant_frames();
if (max_nr_gframes < nr_gframes)
return (ENOSYS);
if (!resume_frames) {
KASSERT(dev != NULL,
("No resume frames and no device provided"));
gnttab_pseudo_phys_res = xenmem_alloc(dev,
&gnttab_pseudo_phys_res_id, PAGE_SIZE * max_nr_gframes);
if (gnttab_pseudo_phys_res == NULL)
panic("Unable to reserve physical memory for gnttab");
resume_frames = rman_get_start(gnttab_pseudo_phys_res);
}
return (gnttab_map(0, nr_gframes - 1));
}
