s390/cio/ccwreq.c

41 static u16 ccwreq_next_path(struct ccw_device *cdev)
43 	struct ccw_request *req = &cdev->private->req;
58 static void ccwreq_stop(struct ccw_device *cdev, int rc)
60 	struct ccw_request *req = &cdev->private->req;
65 	ccw_device_set_timeout(cdev, 0);
66 	memset(&cdev->private->dma_area->irb, 0, sizeof(struct irb));
69 	req->callback(cdev, req->data, rc);
75 static void ccwreq_do(struct ccw_device *cdev)
77 	struct ccw_request *req = &cdev->private->req;
78 	struct subchannel *sch = to_subchannel(cdev->dev.parent);
85 			ccwreq_next_path(cdev);
89 		memset(&cdev->private->dma_area->irb, 0, sizeof(struct irb));
93 			ccw_device_set_timeout(cdev, req->timeout);
102 			ccwreq_next_path(cdev);
111 	ccwreq_stop(cdev, rc);
116  * @cdev: ccw device
118  * Perform the I/O request specified by cdev->req.
120 void ccw_request_start(struct ccw_device *cdev)
122 	struct ccw_request *req = &cdev->private->req;
137 	ccwreq_do(cdev);
141 	ccwreq_stop(cdev, -EACCES);
146  * @cdev: ccw device
148  * Cancel the I/O request specified by cdev->req. Return non-zero if request
151 int ccw_request_cancel(struct ccw_device *cdev)
153 	struct subchannel *sch = to_subchannel(cdev->dev.parent);
154 	struct ccw_request *req = &cdev->private->req;
162 		ccwreq_stop(cdev, rc);
170 static enum io_status ccwreq_status(struct ccw_device *cdev, struct irb *lcirb)
172 	struct irb *irb = &cdev->private->dma_area->irb;
177 	if (ccw_device_accumulate_and_sense(cdev, lcirb))
188 		CIO_HEX_EVENT(2, &cdev->private->dev_id,
190 		CIO_HEX_EVENT(2, &cdev->private->dma_area->irb.ecw,
196 		if (cdev->drv && cdev->drv->uc_handler) {
197 			todo = cdev->drv->uc_handler(cdev, lcirb);
232 static void ccwreq_log_status(struct ccw_device *cdev, enum io_status status)
234 	struct ccw_request *req = &cdev->private->req;
241 	data.dev_id	= cdev->private->dev_id;
251  * @cdev: ccw device
255 void ccw_request_handler(struct ccw_device *cdev)
258 	struct ccw_request *req = &cdev->private->req;
263 	status = ccwreq_status(cdev, irb);
265 		status = req->filter(cdev, req->data, irb, status);
267 		ccw_device_set_timeout(cdev, 0);
269 		ccwreq_log_status(cdev, status);
292 	switch (req->check(cdev, req->data)) {
303 	ccwreq_stop(cdev, 0);
308 	if (!ccwreq_next_path(cdev)) {
314 	ccwreq_do(cdev);
317 	ccwreq_stop(cdev, rc);
323  * @cdev: ccw device
327 void ccw_request_timeout(struct ccw_device *cdev)
329 	struct subchannel *sch = to_subchannel(cdev->dev.parent);
330 	struct ccw_request *req = &cdev->private->req;
339 				dev_name(&cdev->dev), req->timeout / HZ,
346 	if (!ccwreq_next_path(cdev)) {
356 	ccwreq_stop(cdev, rc);
361  * @cdev: ccw device
365 void ccw_request_notoper(struct ccw_device *cdev)
367 	ccwreq_stop(cdev, -ENODEV);