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);
153 	int ref, rc = 0;  in get_free_entries()  local
164 	ref = head = gnttab_free_head;  in get_free_entries()
173 	return ref;  in get_free_entries()
202 static void put_free_entry(grant_ref_t ref)  in put_free_entry()  argument
206 	gnttab_entry(ref) = gnttab_free_head;  in put_free_entry()
207 	gnttab_free_head = ref;  in put_free_entry()
224 static void gnttab_update_entry_v1(grant_ref_t ref, domid_t domid,  in gnttab_update_entry_v1()  argument
227 	gnttab_shared.v1[ref].domid = domid;  in gnttab_update_entry_v1()
228 	gnttab_shared.v1[ref].frame = frame;  in gnttab_update_entry_v1()
230 	gnttab_shared.v1[ref].flags = flags;  in gnttab_update_entry_v1()
236 void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid,  in gnttab_grant_foreign_access_ref()  argument
239 	gnttab_interface->update_entry(ref, domid, frame,  in gnttab_grant_foreign_access_ref()
247 	int ref;  in gnttab_grant_foreign_access()  local
249 	ref = get_free_entries(1);  in gnttab_grant_foreign_access()
250 	if (unlikely(ref < 0))  in gnttab_grant_foreign_access()
253 	gnttab_grant_foreign_access_ref(ref, domid, frame, readonly);  in gnttab_grant_foreign_access()
255 	return ref;  in gnttab_grant_foreign_access()
259 static int gnttab_query_foreign_access_v1(grant_ref_t ref)  in gnttab_query_foreign_access_v1()  argument
261 	return gnttab_shared.v1[ref].flags & (GTF_reading|GTF_writing);  in gnttab_query_foreign_access_v1()
264 int gnttab_query_foreign_access(grant_ref_t ref)  in gnttab_query_foreign_access()  argument
266 	return gnttab_interface->query_foreign_access(ref);  in gnttab_query_foreign_access()
270 static int gnttab_end_foreign_access_ref_v1(grant_ref_t ref, int readonly)  in gnttab_end_foreign_access_ref_v1()  argument
275 	pflags = &gnttab_shared.v1[ref].flags;  in gnttab_end_foreign_access_ref_v1()
286 static inline int _gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly)  in _gnttab_end_foreign_access_ref()  argument
288 	return gnttab_interface->end_foreign_access_ref(ref, readonly);  in _gnttab_end_foreign_access_ref()
291 int gnttab_end_foreign_access_ref(grant_ref_t ref, int readonly)  in gnttab_end_foreign_access_ref()  argument
293 	if (_gnttab_end_foreign_access_ref(ref, readonly))  in gnttab_end_foreign_access_ref()
295 	pr_warn("WARNING: g.e. %#x still in use!\n", ref);  in gnttab_end_foreign_access_ref()
302 	grant_ref_t ref;  member
327 		if (_gnttab_end_foreign_access_ref(entry->ref, entry->ro)) {  in gnttab_handle_deferred()
328 			put_free_entry(entry->ref);  in gnttab_handle_deferred()
331 					 entry->ref, page_to_pfn(entry->page));  in gnttab_handle_deferred()
334 				pr_info("freeing g.e. %#x\n", entry->ref);  in gnttab_handle_deferred()
339 				pr_info("g.e. %#x still pending\n", entry->ref);  in gnttab_handle_deferred()
356 static void gnttab_add_deferred(grant_ref_t ref, bool readonly,  in gnttab_add_deferred()  argument
365 		entry->ref = ref;  in gnttab_add_deferred()
379 	       what, ref, page ? page_to_pfn(page) : -1);  in gnttab_add_deferred()
382 void gnttab_end_foreign_access(grant_ref_t ref, int readonly,  in gnttab_end_foreign_access()  argument
385 	if (gnttab_end_foreign_access_ref(ref, readonly)) {  in gnttab_end_foreign_access()
386 		put_free_entry(ref);  in gnttab_end_foreign_access()
390 		gnttab_add_deferred(ref, readonly,  in gnttab_end_foreign_access()
397 	int ref;  in gnttab_grant_foreign_transfer()  local
399 	ref = get_free_entries(1);  in gnttab_grant_foreign_transfer()
400 	if (unlikely(ref < 0))  in gnttab_grant_foreign_transfer()
402 	gnttab_grant_foreign_transfer_ref(ref, domid, pfn);  in gnttab_grant_foreign_transfer()
404 	return ref;  in gnttab_grant_foreign_transfer()
408 void gnttab_grant_foreign_transfer_ref(grant_ref_t ref, domid_t domid,  in gnttab_grant_foreign_transfer_ref()  argument
411 	gnttab_interface->update_entry(ref, domid, pfn, GTF_accept_transfer);  in gnttab_grant_foreign_transfer_ref()
415 static unsigned long gnttab_end_foreign_transfer_ref_v1(grant_ref_t ref)  in gnttab_end_foreign_transfer_ref_v1()  argument
421 	pflags = &gnttab_shared.v1[ref].flags;  in gnttab_end_foreign_transfer_ref_v1()
440 	frame = gnttab_shared.v1[ref].frame;  in gnttab_end_foreign_transfer_ref_v1()
446 unsigned long gnttab_end_foreign_transfer_ref(grant_ref_t ref)  in gnttab_end_foreign_transfer_ref()  argument
448 	return gnttab_interface->end_foreign_transfer_ref(ref);  in gnttab_end_foreign_transfer_ref()
452 unsigned long gnttab_end_foreign_transfer(grant_ref_t ref)  in gnttab_end_foreign_transfer()  argument
454 	unsigned long frame = gnttab_end_foreign_transfer_ref(ref);  in gnttab_end_foreign_transfer()
455 	put_free_entry(ref);  in gnttab_end_foreign_transfer()
460 void gnttab_free_grant_reference(grant_ref_t ref)  in gnttab_free_grant_reference()  argument
462 	put_free_entry(ref);  in gnttab_free_grant_reference()
468 	grant_ref_t ref;  in gnttab_free_grant_references()  local
474 	ref = head;  in gnttab_free_grant_references()
475 	while (gnttab_entry(ref) != GNTTAB_LIST_END) {  in gnttab_free_grant_references()
476 		ref = gnttab_entry(ref);  in gnttab_free_grant_references()
479 	gnttab_entry(ref) = gnttab_free_head;  in gnttab_free_grant_references()
802 			foreign->gref = map_ops[i].ref;  in gnttab_map_refs()