41 	struct subch_data_s *sd = subch_data;  in scdrv_interrupt()  local
45 	spin_lock_irqsave(&sd->sd_rlock, flags);  in scdrv_interrupt()
46 	spin_lock(&sd->sd_wlock);  in scdrv_interrupt()
47 	status = ia64_sn_irtr_intr(sd->sd_nasid, sd->sd_subch);  in scdrv_interrupt()
51 			wake_up(&sd->sd_rq);  in scdrv_interrupt()
55 			    (sd->sd_nasid, sd->sd_subch,  in scdrv_interrupt()
57 			wake_up(&sd->sd_wq);  in scdrv_interrupt()
60 	spin_unlock(&sd->sd_wlock);  in scdrv_interrupt()
61 	spin_unlock_irqrestore(&sd->sd_rlock, flags);  in scdrv_interrupt()
75 	struct subch_data_s *sd;  in scdrv_open()  local
82 	sd = kzalloc(sizeof (struct subch_data_s), GFP_KERNEL);  in scdrv_open()
83 	if (sd == NULL) {  in scdrv_open()
90 	sd->sd_nasid = scd->scd_nasid;  in scdrv_open()
91 	sd->sd_subch = ia64_sn_irtr_open(scd->scd_nasid);  in scdrv_open()
93 	if (sd->sd_subch < 0) {  in scdrv_open()
94 		kfree(sd);  in scdrv_open()
99 	spin_lock_init(&sd->sd_rlock);  in scdrv_open()
100 	spin_lock_init(&sd->sd_wlock);  in scdrv_open()
101 	init_waitqueue_head(&sd->sd_rq);  in scdrv_open()
102 	init_waitqueue_head(&sd->sd_wq);  in scdrv_open()
103 	sema_init(&sd->sd_rbs, 1);  in scdrv_open()
104 	sema_init(&sd->sd_wbs, 1);  in scdrv_open()
106 	file->private_data = sd;  in scdrv_open()
111 			 IRQF_SHARED, SYSCTL_BASENAME, sd);  in scdrv_open()
113 		ia64_sn_irtr_close(sd->sd_nasid, sd->sd_subch);  in scdrv_open()
114 		kfree(sd);  in scdrv_open()
132 	struct subch_data_s *sd = (struct subch_data_s *) file->private_data;  in scdrv_release()  local
136 	free_irq(SGI_UART_VECTOR, sd);  in scdrv_release()
139 	rv = ia64_sn_irtr_close(sd->sd_nasid, sd->sd_subch);  in scdrv_release()
141 	kfree(sd);  in scdrv_release()
153 read_status_check(struct subch_data_s *sd, int *len)  in read_status_check()  argument
155 	return ia64_sn_irtr_recv(sd->sd_nasid, sd->sd_subch, sd->sd_rb, len);  in read_status_check()
164 	struct subch_data_s *sd = (struct subch_data_s *) file->private_data;  in scdrv_read()  local
167 	if (down_trylock(&sd->sd_rbs)) {  in scdrv_read()
175 		if (down_interruptible(&sd->sd_rbs)) {  in scdrv_read()
183 	spin_lock_irqsave(&sd->sd_rlock, flags);  in scdrv_read()
184 	status = read_status_check(sd, &len);  in scdrv_read()
191 			spin_unlock_irqrestore(&sd->sd_rlock, flags);  in scdrv_read()
192 			up(&sd->sd_rbs);  in scdrv_read()
198 		add_wait_queue(&sd->sd_rq, &wait);  in scdrv_read()
199 		spin_unlock_irqrestore(&sd->sd_rlock, flags);  in scdrv_read()
203 		remove_wait_queue(&sd->sd_rq, &wait);  in scdrv_read()
206 			up(&sd->sd_rbs);  in scdrv_read()
210 		spin_lock_irqsave(&sd->sd_rlock, flags);  in scdrv_read()
211 		status = read_status_check(sd, &len);  in scdrv_read()
213 	spin_unlock_irqrestore(&sd->sd_rlock, flags);  in scdrv_read()
224 		if (copy_to_user(buf, sd->sd_rb, len))  in scdrv_read()
231 	up(&sd->sd_rbs);  in scdrv_read()
245 write_status_check(struct subch_data_s *sd, int count)  in write_status_check()  argument
247 	return ia64_sn_irtr_send(sd->sd_nasid, sd->sd_subch, sd->sd_wb, count);  in write_status_check()
256 	struct subch_data_s *sd = (struct subch_data_s *) file->private_data;  in scdrv_write()  local
259 	if (down_trylock(&sd->sd_wbs)) {  in scdrv_write()
267 		if (down_interruptible(&sd->sd_wbs)) {  in scdrv_write()
274 	if (copy_from_user(sd->sd_wb, buf, count)) {  in scdrv_write()
275 		up(&sd->sd_wbs);  in scdrv_write()
280 	spin_lock_irqsave(&sd->sd_wlock, flags);  in scdrv_write()
281 	status = write_status_check(sd, count);  in scdrv_write()
288 			spin_unlock(&sd->sd_wlock);  in scdrv_write()
289 			up(&sd->sd_wbs);  in scdrv_write()
294 		add_wait_queue(&sd->sd_wq, &wait);  in scdrv_write()
295 		spin_unlock_irqrestore(&sd->sd_wlock, flags);  in scdrv_write()
299 		remove_wait_queue(&sd->sd_wq, &wait);  in scdrv_write()
302 			up(&sd->sd_wbs);  in scdrv_write()
306 		spin_lock_irqsave(&sd->sd_wlock, flags);  in scdrv_write()
307 		status = write_status_check(sd, count);  in scdrv_write()
309 	spin_unlock_irqrestore(&sd->sd_wlock, flags);  in scdrv_write()
312 	up(&sd->sd_wbs);  in scdrv_write()
329 	struct subch_data_s *sd = (struct subch_data_s *) file->private_data;  in scdrv_poll()  local
332 	poll_wait(file, &sd->sd_rq, wait);  in scdrv_poll()
333 	poll_wait(file, &sd->sd_wq, wait);  in scdrv_poll()
335 	spin_lock_irqsave(&sd->sd_rlock, flags);  in scdrv_poll()
336 	spin_lock(&sd->sd_wlock);  in scdrv_poll()
337 	status = ia64_sn_irtr_intr(sd->sd_nasid, sd->sd_subch);  in scdrv_poll()
338 	spin_unlock(&sd->sd_wlock);  in scdrv_poll()
339 	spin_unlock_irqrestore(&sd->sd_rlock, flags);  in scdrv_poll()