+
+static void handle_fcp_region_request(struct fw_card *card,
+ struct fw_packet *p,
+ struct fw_request *request,
+ unsigned long long offset)
+{
+ struct fw_address_handler *handler;
+ unsigned long flags;
+ int tcode, destination, source;
+
+ if ((offset != (CSR_REGISTER_BASE | CSR_FCP_COMMAND) &&
+ offset != (CSR_REGISTER_BASE | CSR_FCP_RESPONSE)) ||
+ request->length > 0x200) {
+ fw_send_response(card, request, RCODE_ADDRESS_ERROR);
+
+ return;
+ }
+
+ tcode = HEADER_GET_TCODE(p->header[0]);
+ destination = HEADER_GET_DESTINATION(p->header[0]);
+ source = HEADER_GET_SOURCE(p->header[1]);
+
+ if (tcode != TCODE_WRITE_QUADLET_REQUEST &&
+ tcode != TCODE_WRITE_BLOCK_REQUEST) {
+ fw_send_response(card, request, RCODE_TYPE_ERROR);
+
+ return;
+ }
+
+ spin_lock_irqsave(&address_handler_lock, flags);
+ list_for_each_entry(handler, &address_handler_list, link) {
+ if (is_enclosing_handler(handler, offset, request->length))
+ handler->address_callback(card, NULL, tcode,
+ destination, source,
+ p->generation, p->speed,
+ offset, request->data,
+ request->length,
+ handler->callback_data);
+ }
+ spin_unlock_irqrestore(&address_handler_lock, flags);
+
+ fw_send_response(card, request, RCODE_COMPLETE);
+}
+
+void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
+{
+ struct fw_request *request;
+ unsigned long long offset;
+
+ if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
+ return;
+
+ request = allocate_request(p);
+ if (request == NULL) {
+ /* FIXME: send statically allocated busy packet. */
+ return;
+ }
+
+ offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) |
+ p->header[2];
+
+ if (!is_in_fcp_region(offset, request->length))
+ handle_exclusive_region_request(card, p, request, offset);
+ else
+ handle_fcp_region_request(card, p, request, offset);
+
+}