Use gnttab_map_refs and gnttab_unmap_refs to map and unmap the grant
ref, so that we can have a corresponding struct page.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
struct ioctl_gntdev_grant_ref *grants;
struct gnttab_map_grant_ref *map_ops;
struct gnttab_unmap_grant_ref *unmap_ops;
struct ioctl_gntdev_grant_ref *grants;
struct gnttab_map_grant_ref *map_ops;
struct gnttab_unmap_grant_ref *unmap_ops;
};
/* ------------------------------------------------------------------ */
};
/* ------------------------------------------------------------------ */
static struct grant_map *gntdev_alloc_map(struct gntdev_priv *priv, int count)
{
struct grant_map *add;
static struct grant_map *gntdev_alloc_map(struct gntdev_priv *priv, int count)
{
struct grant_map *add;
add = kzalloc(sizeof(struct grant_map), GFP_KERNEL);
if (NULL == add)
add = kzalloc(sizeof(struct grant_map), GFP_KERNEL);
if (NULL == add)
add->grants = kzalloc(sizeof(add->grants[0]) * count, GFP_KERNEL);
add->map_ops = kzalloc(sizeof(add->map_ops[0]) * count, GFP_KERNEL);
add->unmap_ops = kzalloc(sizeof(add->unmap_ops[0]) * count, GFP_KERNEL);
add->grants = kzalloc(sizeof(add->grants[0]) * count, GFP_KERNEL);
add->map_ops = kzalloc(sizeof(add->map_ops[0]) * count, GFP_KERNEL);
add->unmap_ops = kzalloc(sizeof(add->unmap_ops[0]) * count, GFP_KERNEL);
- if (NULL == add->grants ||
- NULL == add->map_ops ||
- NULL == add->unmap_ops)
+ add->pages = kzalloc(sizeof(add->pages[0]) * count, GFP_KERNEL);
+ if (NULL == add->grants ||
+ NULL == add->map_ops ||
+ NULL == add->unmap_ops ||
+ NULL == add->pages)
+ for (i = 0; i < count; i++) {
+ add->pages[i] = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
+ if (add->pages[i] == NULL)
+ goto err;
+ }
+
add->index = 0;
add->count = count;
add->priv = priv;
add->index = 0;
add->count = count;
add->priv = priv;
+ if (add->pages)
+ for (i = 0; i < count; i++) {
+ if (add->pages[i])
+ __free_page(add->pages[i]);
+ }
+ kfree(add->pages);
kfree(add->grants);
kfree(add->map_ops);
kfree(add->unmap_ops);
kfree(add->grants);
kfree(add->map_ops);
kfree(add->unmap_ops);
static void gntdev_free_map(struct grant_map *map)
{
static void gntdev_free_map(struct grant_map *map)
{
+
+ if (map->pages)
+ for (i = 0; i < map->count; i++) {
+ if (map->pages[i])
+ __free_page(map->pages[i]);
+ }
+ kfree(map->pages);
kfree(map->grants);
kfree(map->map_ops);
kfree(map->unmap_ops);
kfree(map->grants);
kfree(map->map_ops);
kfree(map->unmap_ops);
int i, err = 0;
pr_debug("map %d+%d\n", map->index, map->count);
int i, err = 0;
pr_debug("map %d+%d\n", map->index, map->count);
- err = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref,
- map->map_ops, map->count);
+ err = gnttab_map_refs(map->map_ops, map->pages, map->count);
int i, err = 0;
pr_debug("map %d+%d [%d+%d]\n", map->index, map->count, offset, pages);
int i, err = 0;
pr_debug("map %d+%d [%d+%d]\n", map->index, map->count, offset, pages);
- err = HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref,
- map->unmap_ops + offset, pages);
+ err = gnttab_unmap_refs(map->unmap_ops + offset, map->pages, pages);