s390/char/raw3270.c

144 	struct raw3270_request *rq;
147 	rq = kzalloc(sizeof(*rq), GFP_KERNEL | GFP_DMA);
148 	if (!rq)
153 		rq->buffer = kmalloc(size, GFP_KERNEL | GFP_DMA);
154 		if (!rq->buffer) {
155 			kfree(rq);
159 	rq->size = size;
160 	INIT_LIST_HEAD(&rq->list);
165 	if (rq->buffer)
166 		rq->ccw.cda = virt_to_dma32(rq->buffer);
167 	rq->ccw.flags = CCW_FLAG_SLI;
169 	return rq;
176 void raw3270_request_free(struct raw3270_request *rq)
178 	kfree(rq->buffer);
179 	kfree(rq);
186 int raw3270_request_reset(struct raw3270_request *rq)
188 	if (WARN_ON_ONCE(!list_empty(&rq->list)))
190 	rq->ccw.cmd_code = 0;
191 	rq->ccw.count = 0;
192 	if (rq->buffer)
193 		rq->ccw.cda = virt_to_dma32(rq->buffer);
194 	rq->ccw.flags = CCW_FLAG_SLI;
195 	rq->rescnt = 0;
196 	rq->rc = 0;
204 void raw3270_request_set_cmd(struct raw3270_request *rq, u8 cmd)
206 	rq->ccw.cmd_code = cmd;
213 int raw3270_request_add_data(struct raw3270_request *rq, void *data, size_t size)
215 	if (size + rq->ccw.count > rq->size)
217 	memcpy(rq->buffer + rq->ccw.count, data, size);
218 	rq->ccw.count += size;
226 void raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size)
228 	rq->ccw.cda = virt_to_dma32(data);
229 	rq->ccw.count = size;
236 void raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib)
238 	rq->ccw.cda = virt_to_dma32(ib->data);
239 	rq->ccw.count = ib->size;
240 	rq->ccw.flags |= CCW_FLAG_IDA;
249 			   struct raw3270_request *rq)
251 	rq->view = view;
256 		rq->rc = ccw_device_start(rp->cdev, &rq->ccw,
257 					  (unsigned long)rq, 0, 0);
258 		if (rq->rc) {
260 			return rq->rc;
263 	list_add_tail(&rq->list, &rp->req_queue);
274 int raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
287 		rc =  __raw3270_start(rp, view, rq);
293 int raw3270_start_request(struct raw3270_view *view, struct raw3270_request *rq,
298 	rc = raw3270_request_reset(rq);
301 	raw3270_request_set_cmd(rq, cmd);
302 	rc = raw3270_request_add_data(rq, data, len);
305 	return raw3270_start(view, rq);
309 int raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
320 		rc =  __raw3270_start(rp, view, rq);
325 int raw3270_start_irq(struct raw3270_view *view, struct raw3270_request *rq)
330 	rq->view = view;
332 	list_add_tail(&rq->list, &rp->req_queue);
344 	struct raw3270_request *rq;
349 	rq = (struct raw3270_request *)intparm;
350 	view = rq ? rq->view : rp->view;
369 			view->fn->intv(view, rq, irb);
376 	if (rq && !list_empty(&rq->list)) {
378 		list_del_init(&rq->list);
379 		if (rq->callback)
380 			rq->callback(rq, rq->callback_data);
390 		rq = list_entry(rp->req_queue.next, struct raw3270_request, list);
391 		rq->rc = ccw_device_start(rp->cdev, &rq->ccw,
392 					  (unsigned long)rq, 0, 0);
393 		if (rq->rc == 0)
396 		list_del_init(&rq->list);
397 		if (rq->callback)
398 			rq->callback(rq, rq->callback_data);
565 void raw3270_read_modified_cb(struct raw3270_request *rq, void *data)
567 	struct raw3270 *rp = rq->view->dev;
612 static void raw3270_reset_device_cb(struct raw3270_request *rq, void *data)
614 	struct raw3270 *rp = rq->view->dev;
618 	if (rq->rc) {
679 	struct raw3270_request *rq;
686 		rq = list_entry(rp->req_queue.next, struct raw3270_request, list);
687 		view = rq->view;
688 		rq->rc = -EACCES;
689 		list_del_init(&rq->list);
690 		if (rq->callback)
691 			rq->callback(rq, rq->callback_data);
698 static void raw3270_init_irq(struct raw3270_view *view, struct raw3270_request *rq,
703 	if (rq) {
706 				rq->rc = -EOPNOTSUPP;
708 				rq->rc = -EIO;