98 	void (*update_entry)(grant_ref_t ref, domid_t domid,
108 	int (*end_foreign_access_ref)(grant_ref_t ref, int readonly);
116 	unsigned long (*end_foreign_transfer_ref)(grant_ref_t ref);
123 	int (*query_foreign_access)(grant_ref_t ref);
152 	int ref, rc = 0;  in get_free_entries()  local
163 	ref = head = gnttab_free_head;  in get_free_entries()
172 	return ref;  in get_free_entries()
201 static void put_free_entry(grant_ref_t ref)  in put_free_entry()  argument
205 	gnttab_entry(ref) = gnttab_free_head;  in put_free_entry()
206 	gnttab_free_head = ref;  in put_free_entry()
223 static void gnttab_update_entry_v1(grant_ref_t ref, domid_t domid,  in gnttab_update_entry_v1()  argument
226 	gnttab_shared.v1[ref].domid = domid;  in gnttab_update_entry_v1()
227 	gnttab_shared.v1[ref].frame = frame;  in gnttab_update_entry_v1()
229 	gnttab_shared.v1[ref].flags = flags;  in gnttab_update_entry_v1()
235 void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid,  in gnttab_grant_foreign_access_ref()  argument
238 	gnttab_interface->update_entry(ref, domid, frame,  in gnttab_grant_foreign_access_ref()
246 	int ref;  in gnttab_grant_foreign_access()  local
248 	ref = get_free_entries(1);  in gnttab_grant_foreign_access()
249 	if (unlikely(ref < 0))  in gnttab_grant_foreign_access()
252 	gnttab_grant_foreign_access_ref(ref, domid, frame, readonly);  in gnttab_grant_foreign_access()
254 	return ref;  in gnttab_grant_foreign_access()
258 static int gnttab_query_foreign_access_v1(grant_ref_t ref)  in gnttab_query_foreign_access_v1()  argument
260 	return gnttab_shared.v1[ref].flags & (GTF_reading|GTF_writing);  in gnttab_query_foreign_access_v1()
263 int gnttab_query_foreign_access(grant_ref_t ref)  in gnttab_query_foreign_access()  argument
265 	return gnttab_interface->query_foreign_access(ref);  in gnttab_query_foreign_access()
269 static int gnttab_end_foreign_access_ref_v1(grant_ref_t ref, int readonly)  in gnttab_end_foreign_access_ref_v1()  argument
274 	pflags = &gnttab_shared.v1[ref].flags;  in gnttab_end_foreign_access_ref_v1()
285 static inline int _gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly)  in _gnttab_end_foreign_access_ref()  argument
287 	return gnttab_interface->end_foreign_access_ref(ref, readonly);  in _gnttab_end_foreign_access_ref()
290 int gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly)  in gnttab_end_foreign_access_ref()  argument
292 	if (_gnttab_end_foreign_access_ref(ref, readonly))  in gnttab_end_foreign_access_ref()
294 	pr_warn("WARNING: g.e. %#x still in use!\n", ref);  in gnttab_end_foreign_access_ref()
301 	grant_ref_t ref;  member
326 		if (_gnttab_end_foreign_access_ref(entry->ref, entry->ro)) {  in gnttab_handle_deferred()
327 			put_free_entry(entry->ref);  in gnttab_handle_deferred()
330 					 entry->ref, page_to_pfn(entry->page));  in gnttab_handle_deferred()
333 				pr_info("freeing g.e. %#x\n", entry->ref);  in gnttab_handle_deferred()
338 				pr_info("g.e. %#x still pending\n", entry->ref);  in gnttab_handle_deferred()
355 static void gnttab_add_deferred(grant_ref_t ref, bool readonly,  in gnttab_add_deferred()  argument
364 		entry->ref = ref;  in gnttab_add_deferred()
378 	       what, ref, page ? page_to_pfn(page) : -1);  in gnttab_add_deferred()
381 void gnttab_end_foreign_access(grant_ref_t ref, int readonly,  in gnttab_end_foreign_access()  argument
384 	if (gnttab_end_foreign_access_ref(ref, readonly)) {  in gnttab_end_foreign_access()
385 		put_free_entry(ref);  in gnttab_end_foreign_access()
389 		gnttab_add_deferred(ref, readonly,  in gnttab_end_foreign_access()
396 	int ref;  in gnttab_grant_foreign_transfer()  local
398 	ref = get_free_entries(1);  in gnttab_grant_foreign_transfer()
399 	if (unlikely(ref < 0))  in gnttab_grant_foreign_transfer()
401 	gnttab_grant_foreign_transfer_ref(ref, domid, pfn);  in gnttab_grant_foreign_transfer()
403 	return ref;  in gnttab_grant_foreign_transfer()
407 void gnttab_grant_foreign_transfer_ref(grant_ref_t ref, domid_t domid,  in gnttab_grant_foreign_transfer_ref()  argument
410 	gnttab_interface->update_entry(ref, domid, pfn, GTF_accept_transfer);  in gnttab_grant_foreign_transfer_ref()
414 static unsigned long gnttab_end_foreign_transfer_ref_v1(grant_ref_t ref)  in gnttab_end_foreign_transfer_ref_v1()  argument
420 	pflags = &gnttab_shared.v1[ref].flags;  in gnttab_end_foreign_transfer_ref_v1()
439 	frame = gnttab_shared.v1[ref].frame;  in gnttab_end_foreign_transfer_ref_v1()
445 unsigned long gnttab_end_foreign_transfer_ref(grant_ref_t ref)  in gnttab_end_foreign_transfer_ref()  argument
447 	return gnttab_interface->end_foreign_transfer_ref(ref);  in gnttab_end_foreign_transfer_ref()
451 unsigned long gnttab_end_foreign_transfer(grant_ref_t ref)  in gnttab_end_foreign_transfer()  argument
453 	unsigned long frame = gnttab_end_foreign_transfer_ref(ref);  in gnttab_end_foreign_transfer()
454 	put_free_entry(ref);  in gnttab_end_foreign_transfer()
459 void gnttab_free_grant_reference(grant_ref_t ref)  in gnttab_free_grant_reference()  argument
461 	put_free_entry(ref);  in gnttab_free_grant_reference()
467 	grant_ref_t ref;  in gnttab_free_grant_references()  local
473 	ref = head;  in gnttab_free_grant_references()
474 	while (gnttab_entry(ref) != GNTTAB_LIST_END) {  in gnttab_free_grant_references()
475 		ref = gnttab_entry(ref);  in gnttab_free_grant_references()
478 	gnttab_entry(ref) = gnttab_free_head;  in gnttab_free_grant_references()
849 			foreign->gref = map_ops[i].ref;  in gnttab_map_refs()