[SCSI] zfcp: rework request ID management.

[powerpc.git] / drivers / s390 / scsi / zfcp_def.h

diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 07b0957..2264963 100644 (file)
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -1089,6 +1089,42 @@ extern void _zfcp_hex_dump(char *, int);
 #define zfcp_get_busid_by_port(port) (zfcp_get_busid_by_adapter(port->adapter))
 #define zfcp_get_busid_by_unit(unit) (zfcp_get_busid_by_port(unit->port))
 
+/*
+ * Helper functions for request ID management.
+ */
+static inline int zfcp_reqlist_hash(unsigned long req_id)
+{
+       return req_id % REQUEST_LIST_SIZE;
+}
+
+static inline void zfcp_reqlist_add(struct zfcp_adapter *adapter,
+                                   struct zfcp_fsf_req *fsf_req)
+{
+       unsigned int idx;
+
+       idx = zfcp_reqlist_hash(fsf_req->req_id);
+       list_add_tail(&fsf_req->list, &adapter->req_list[idx]);
+}
+
+static inline void zfcp_reqlist_remove(struct zfcp_adapter *adapter,
+                                      struct zfcp_fsf_req *fsf_req)
+{
+       list_del(&fsf_req->list);
+}
+
+static inline struct zfcp_fsf_req *
+zfcp_reqlist_find(struct zfcp_adapter *adapter, unsigned long req_id)
+{
+       struct zfcp_fsf_req *request;
+       unsigned int idx;
+
+       idx = zfcp_reqlist_hash(req_id);
+       list_for_each_entry(request, &adapter->req_list[idx], list)
+               if (request->req_id == req_id)
+                       return request;
+       return NULL;
+}
+
 /*
  *  functions needed for reference/usage counting
  */