s390/cio/fcx.c

118 static u32 calc_cbc_size(struct tidaw *tidaw, int num)
126 		if (tidaw[i].flags & TIDAW_FLAGS_LAST)
129 		 * transferred or data transferred by this tidaw. Assumption:
131 		data_count += tidaw[i].count;
132 		if (tidaw[i].flags & TIDAW_FLAGS_INSERT_CBC) {
142  * tcw_finalize - finalize tcw length fields and tidaw list
148  * tcat the tccb and terminate the data tidaw list if used.
150  * Note: in case input- or output-tida is used, the tidaw-list must be stored
156 	struct tidaw *tidaw;
161 	/* Terminate tidaw list. */
162 	tidaw = tcw_get_data(tcw);
164 		tidaw[num_tidaws - 1].flags |= TIDAW_FLAGS_LAST;
172 		count += calc_cbc_size(tidaw, num_tidaws);
324  * tcw_add_tidaw - add a tidaw to a tcw
327  * @flags: flags for the new tidaw
328  * @addr: address value for the new tidaw
329  * @count: count value for the new tidaw
331  * Add a new tidaw to the input/output data tidaw-list of the specified tcw
333  * the new tidaw.
335  * Note: the tidaw-list is assumed to be contiguous with no ttics. The caller
336  * must ensure that there is enough space for the new tidaw. The last-tidaw
337  * flag for the last tidaw in the list will be set by tcw_finalize.
339 struct tidaw *tcw_add_tidaw(struct tcw *tcw, int num_tidaws, u8 flags,
342 	struct tidaw *tidaw;
344 	/* Add tidaw to tidaw-list. */
345 	tidaw = ((struct tidaw *) tcw_get_data(tcw)) + num_tidaws;
346 	memset(tidaw, 0, sizeof(struct tidaw));
347 	tidaw->flags = flags;
348 	tidaw->count = count;
349 	tidaw->addr = virt_to_dma64(addr);
350 	return tidaw;