Lines Matching refs:port
165 struct port { struct
235 static struct port *find_port_by_vtermno(u32 vtermno) in find_port_by_vtermno() argument
237 struct port *port; in find_port_by_vtermno() local
244 port = container_of(cons, struct port, cons); in find_port_by_vtermno()
248 port = NULL; in find_port_by_vtermno()
251 return port; in find_port_by_vtermno()
254 static struct port *find_port_by_devt_in_portdev(struct ports_device *portdev, in find_port_by_devt_in_portdev()
257 struct port *port; in find_port_by_devt_in_portdev() local
261 list_for_each_entry(port, &portdev->ports, list) { in find_port_by_devt_in_portdev()
262 if (port->cdev->dev == dev) { in find_port_by_devt_in_portdev()
263 kref_get(&port->kref); in find_port_by_devt_in_portdev()
267 port = NULL; in find_port_by_devt_in_portdev()
271 return port; in find_port_by_devt_in_portdev()
274 static struct port *find_port_by_devt(dev_t dev) in find_port_by_devt()
277 struct port *port; in find_port_by_devt() local
282 port = find_port_by_devt_in_portdev(portdev, dev); in find_port_by_devt()
283 if (port) in find_port_by_devt()
286 port = NULL; in find_port_by_devt()
289 return port; in find_port_by_devt()
292 static struct port *find_port_by_id(struct ports_device *portdev, u32 id) in find_port_by_id()
294 struct port *port; in find_port_by_id() local
298 list_for_each_entry(port, &portdev->ports, list) in find_port_by_id()
299 if (port->id == id) in find_port_by_id()
301 port = NULL; in find_port_by_id()
305 return port; in find_port_by_id()
308 static struct port *find_port_by_vq(struct ports_device *portdev, in find_port_by_vq()
311 struct port *port; in find_port_by_vq() local
315 list_for_each_entry(port, &portdev->ports, list) in find_port_by_vq()
316 if (port->in_vq == vq || port->out_vq == vq) in find_port_by_vq()
318 port = NULL; in find_port_by_vq()
321 return port; in find_port_by_vq()
324 static bool is_console_port(struct port *port) in is_console_port() argument
326 if (port->cons.hvc) in is_console_port()
461 static struct port_buffer *get_inbuf(struct port *port) in get_inbuf() argument
466 if (port->inbuf) in get_inbuf()
467 return port->inbuf; in get_inbuf()
469 buf = virtqueue_get_buf(port->in_vq, &len); in get_inbuf()
473 port->stats.bytes_received += len; in get_inbuf()
499 static void discard_port_data(struct port *port) in discard_port_data() argument
504 if (!port->portdev) { in discard_port_data()
508 buf = get_inbuf(port); in discard_port_data()
512 port->stats.bytes_discarded += buf->len - buf->offset; in discard_port_data()
513 if (add_inbuf(port->in_vq, buf) < 0) { in discard_port_data()
517 port->inbuf = NULL; in discard_port_data()
518 buf = get_inbuf(port); in discard_port_data()
521 dev_warn(port->dev, "Errors adding %d buffers back to vq\n", in discard_port_data()
525 static bool port_has_data(struct port *port) in port_has_data() argument
531 spin_lock_irqsave(&port->inbuf_lock, flags); in port_has_data()
532 port->inbuf = get_inbuf(port); in port_has_data()
533 if (port->inbuf) in port_has_data()
536 spin_unlock_irqrestore(&port->inbuf_lock, flags); in port_has_data()
571 static ssize_t send_control_msg(struct port *port, unsigned int event, in send_control_msg() argument
575 if (port->portdev) in send_control_msg()
576 return __send_control_msg(port->portdev, port->id, event, value); in send_control_msg()
582 static void reclaim_consumed_buffers(struct port *port) in reclaim_consumed_buffers() argument
587 if (!port->portdev) { in reclaim_consumed_buffers()
591 while ((buf = virtqueue_get_buf(port->out_vq, &len))) { in reclaim_consumed_buffers()
593 port->outvq_full = false; in reclaim_consumed_buffers()
597 static ssize_t __send_to_port(struct port *port, struct scatterlist *sg, in __send_to_port() argument
606 out_vq = port->out_vq; in __send_to_port()
608 spin_lock_irqsave(&port->outvq_lock, flags); in __send_to_port()
610 reclaim_consumed_buffers(port); in __send_to_port()
623 port->outvq_full = true; in __send_to_port()
641 spin_unlock_irqrestore(&port->outvq_lock, flags); in __send_to_port()
643 port->stats.bytes_sent += in_count; in __send_to_port()
655 static ssize_t fill_readbuf(struct port *port, char __user *out_buf, in fill_readbuf() argument
661 if (!out_count || !port_has_data(port)) in fill_readbuf()
664 buf = port->inbuf; in fill_readbuf()
685 spin_lock_irqsave(&port->inbuf_lock, flags); in fill_readbuf()
686 port->inbuf = NULL; in fill_readbuf()
688 if (add_inbuf(port->in_vq, buf) < 0) in fill_readbuf()
689 dev_warn(port->dev, "failed add_buf\n"); in fill_readbuf()
691 spin_unlock_irqrestore(&port->inbuf_lock, flags); in fill_readbuf()
698 static bool will_read_block(struct port *port) in will_read_block() argument
700 if (!port->guest_connected) { in will_read_block()
704 return !port_has_data(port) && port->host_connected; in will_read_block()
707 static bool will_write_block(struct port *port) in will_write_block() argument
711 if (!port->guest_connected) { in will_write_block()
715 if (!port->host_connected) in will_write_block()
718 spin_lock_irq(&port->outvq_lock); in will_write_block()
723 reclaim_consumed_buffers(port); in will_write_block()
724 ret = port->outvq_full; in will_write_block()
725 spin_unlock_irq(&port->outvq_lock); in will_write_block()
733 struct port *port; in port_fops_read() local
736 port = filp->private_data; in port_fops_read()
739 if (!port->guest_connected) in port_fops_read()
742 if (!port_has_data(port)) { in port_fops_read()
748 if (!port->host_connected) in port_fops_read()
753 ret = wait_event_freezable(port->waitqueue, in port_fops_read()
754 !will_read_block(port)); in port_fops_read()
759 if (!port->guest_connected) in port_fops_read()
771 if (!port_has_data(port) && !port->host_connected) in port_fops_read()
774 return fill_readbuf(port, ubuf, count, true); in port_fops_read()
777 static int wait_port_writable(struct port *port, bool nonblock) in wait_port_writable() argument
781 if (will_write_block(port)) { in wait_port_writable()
785 ret = wait_event_freezable(port->waitqueue, in wait_port_writable()
786 !will_write_block(port)); in wait_port_writable()
791 if (!port->guest_connected) in wait_port_writable()
800 struct port *port; in port_fops_write() local
810 port = filp->private_data; in port_fops_write()
814 ret = wait_port_writable(port, nonblock); in port_fops_write()
820 buf = alloc_buf(port->portdev->vdev, count, 0); in port_fops_write()
839 ret = __send_to_port(port, sg, 1, count, buf, nonblock); in port_fops_write()
905 struct port *port = filp->private_data; in port_fops_splice_write() local
923 if (is_rproc_serial(port->out_vq->vdev)) in port_fops_splice_write()
931 ret = wait_port_writable(port, filp->f_flags & O_NONBLOCK); in port_fops_splice_write()
936 buf = alloc_buf(port->portdev->vdev, 0, occupancy); in port_fops_splice_write()
951 ret = __send_to_port(port, buf->sg, sgl.n, sgl.len, buf, true); in port_fops_splice_write()
964 struct port *port; in port_fops_poll() local
967 port = filp->private_data; in port_fops_poll()
968 poll_wait(filp, &port->waitqueue, wait); in port_fops_poll()
970 if (!port->guest_connected) { in port_fops_poll()
975 if (!will_read_block(port)) in port_fops_poll()
977 if (!will_write_block(port)) in port_fops_poll()
979 if (!port->host_connected) in port_fops_poll()
989 struct port *port; in port_fops_release() local
991 port = filp->private_data; in port_fops_release()
994 send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 0); in port_fops_release()
996 spin_lock_irq(&port->inbuf_lock); in port_fops_release()
997 port->guest_connected = false; in port_fops_release()
999 discard_port_data(port); in port_fops_release()
1001 spin_unlock_irq(&port->inbuf_lock); in port_fops_release()
1003 spin_lock_irq(&port->outvq_lock); in port_fops_release()
1004 reclaim_consumed_buffers(port); in port_fops_release()
1005 spin_unlock_irq(&port->outvq_lock); in port_fops_release()
1016 kref_put(&port->kref, remove_port); in port_fops_release()
1024 struct port *port; in port_fops_open() local
1028 port = find_port_by_devt(cdev->dev); in port_fops_open()
1029 if (!port) { in port_fops_open()
1033 filp->private_data = port; in port_fops_open()
1039 if (is_console_port(port)) { in port_fops_open()
1045 spin_lock_irq(&port->inbuf_lock); in port_fops_open()
1046 if (port->guest_connected) { in port_fops_open()
1047 spin_unlock_irq(&port->inbuf_lock); in port_fops_open()
1052 port->guest_connected = true; in port_fops_open()
1053 spin_unlock_irq(&port->inbuf_lock); in port_fops_open()
1055 spin_lock_irq(&port->outvq_lock); in port_fops_open()
1061 reclaim_consumed_buffers(port); in port_fops_open()
1062 spin_unlock_irq(&port->outvq_lock); in port_fops_open()
1071 kref_put(&port->kref, remove_port); in port_fops_open()
1077 struct port *port; in port_fops_fasync() local
1079 port = filp->private_data; in port_fops_fasync()
1080 return fasync_helper(fd, filp, mode, &port->async_queue); in port_fops_fasync()
1111 struct port *port; in put_chars() local
1119 port = find_port_by_vtermno(vtermno); in put_chars()
1120 if (!port) in put_chars()
1128 ret = __send_to_port(port, sg, 1, count, data, false); in put_chars()
1142 struct port *port; in get_chars() local
1148 port = find_port_by_vtermno(vtermno); in get_chars()
1149 if (!port) in get_chars()
1153 BUG_ON(!port->in_vq); in get_chars()
1155 return fill_readbuf(port, (__force char __user *)buf, count, false); in get_chars()
1158 static void resize_console(struct port *port) in resize_console() argument
1163 if (!port || !is_console_port(port)) in resize_console()
1166 vdev = port->portdev->vdev; in resize_console()
1171 hvc_resize(port->cons.hvc, port->cons.ws); in resize_console()
1177 struct port *port; in notifier_add_vio() local
1179 port = find_port_by_vtermno(hp->vtermno); in notifier_add_vio()
1180 if (!port) in notifier_add_vio()
1184 resize_console(port); in notifier_add_vio()
1218 static int init_port_console(struct port *port) in init_port_console() argument
1243 port->cons.vtermno = ret; in init_port_console()
1244 port->cons.hvc = hvc_alloc(port->cons.vtermno, 0, &hv_ops, PAGE_SIZE); in init_port_console()
1245 if (IS_ERR(port->cons.hvc)) { in init_port_console()
1246 ret = PTR_ERR(port->cons.hvc); in init_port_console()
1247 dev_err(port->dev, in init_port_console()
1249 port->cons.hvc = NULL; in init_port_console()
1250 ida_free(&vtermno_ida, port->cons.vtermno); in init_port_console()
1254 list_add_tail(&port->cons.list, &pdrvdata.consoles); in init_port_console()
1256 port->guest_connected = true; in init_port_console()
1266 send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 1); in init_port_console()
1274 struct port *port; in show_port_name() local
1276 port = dev_get_drvdata(dev); in show_port_name()
1278 return sprintf(buffer, "%s\n", port->name); in show_port_name()
1295 struct port *port = s->private; in port_debugfs_show() local
1297 seq_printf(s, "name: %s\n", port->name ? port->name : ""); in port_debugfs_show()
1298 seq_printf(s, "guest_connected: %d\n", port->guest_connected); in port_debugfs_show()
1299 seq_printf(s, "host_connected: %d\n", port->host_connected); in port_debugfs_show()
1300 seq_printf(s, "outvq_full: %d\n", port->outvq_full); in port_debugfs_show()
1301 seq_printf(s, "bytes_sent: %lu\n", port->stats.bytes_sent); in port_debugfs_show()
1302 seq_printf(s, "bytes_received: %lu\n", port->stats.bytes_received); in port_debugfs_show()
1303 seq_printf(s, "bytes_discarded: %lu\n", port->stats.bytes_discarded); in port_debugfs_show()
1305 is_console_port(port) ? "yes" : "no"); in port_debugfs_show()
1306 seq_printf(s, "console_vtermno: %u\n", port->cons.vtermno); in port_debugfs_show()
1313 static void set_console_size(struct port *port, u16 rows, u16 cols) in set_console_size() argument
1315 if (!port || !is_console_port(port)) in set_console_size()
1318 port->cons.ws.ws_row = rows; in set_console_size()
1319 port->cons.ws.ws_col = cols; in set_console_size()
1348 static void send_sigio_to_port(struct port *port) in send_sigio_to_port() argument
1350 if (port->async_queue && port->guest_connected) in send_sigio_to_port()
1351 kill_fasync(&port->async_queue, SIGIO, POLL_OUT); in send_sigio_to_port()
1357 struct port *port; in add_port() local
1361 port = kmalloc(sizeof(*port), GFP_KERNEL); in add_port()
1362 if (!port) { in add_port()
1366 kref_init(&port->kref); in add_port()
1368 port->portdev = portdev; in add_port()
1369 port->id = id; in add_port()
1371 port->name = NULL; in add_port()
1372 port->inbuf = NULL; in add_port()
1373 port->cons.hvc = NULL; in add_port()
1374 port->async_queue = NULL; in add_port()
1376 port->cons.ws.ws_row = port->cons.ws.ws_col = 0; in add_port()
1377 port->cons.vtermno = 0; in add_port()
1379 port->host_connected = port->guest_connected = false; in add_port()
1380 port->stats = (struct port_stats) { 0 }; in add_port()
1382 port->outvq_full = false; in add_port()
1384 port->in_vq = portdev->in_vqs[port->id]; in add_port()
1385 port->out_vq = portdev->out_vqs[port->id]; in add_port()
1387 port->cdev = cdev_alloc(); in add_port()
1388 if (!port->cdev) { in add_port()
1389 dev_err(&port->portdev->vdev->dev, "Error allocating cdev\n"); in add_port()
1393 port->cdev->ops = &port_fops; in add_port()
1396 err = cdev_add(port->cdev, devt, 1); in add_port()
1398 dev_err(&port->portdev->vdev->dev, in add_port()
1402 port->dev = device_create(pdrvdata.class, &port->portdev->vdev->dev, in add_port()
1403 devt, port, "vport%up%u", in add_port()
1404 port->portdev->vdev->index, id); in add_port()
1405 if (IS_ERR(port->dev)) { in add_port()
1406 err = PTR_ERR(port->dev); in add_port()
1407 dev_err(&port->portdev->vdev->dev, in add_port()
1413 spin_lock_init(&port->inbuf_lock); in add_port()
1414 spin_lock_init(&port->outvq_lock); in add_port()
1415 init_waitqueue_head(&port->waitqueue); in add_port()
1421 err = fill_queue(port->in_vq, &port->inbuf_lock); in add_port()
1423 dev_err(port->dev, "Error allocating inbufs\n"); in add_port()
1427 if (is_rproc_serial(port->portdev->vdev)) in add_port()
1433 port->host_connected = true; in add_port()
1434 else if (!use_multiport(port->portdev)) { in add_port()
1439 err = init_port_console(port); in add_port()
1445 list_add_tail(&port->list, &port->portdev->ports); in add_port()
1453 send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1); in add_port()
1460 port->portdev->vdev->index, id); in add_port()
1461 port->debugfs_file = debugfs_create_file(debugfs_name, 0444, in add_port()
1463 port, &port_debugfs_fops); in add_port()
1468 device_destroy(pdrvdata.class, port->dev->devt); in add_port()
1470 cdev_del(port->cdev); in add_port()
1472 kfree(port); in add_port()
1482 struct port *port; in remove_port() local
1484 port = container_of(kref, struct port, kref); in remove_port()
1486 kfree(port); in remove_port()
1489 static void remove_port_data(struct port *port) in remove_port_data() argument
1491 spin_lock_irq(&port->inbuf_lock); in remove_port_data()
1493 discard_port_data(port); in remove_port_data()
1494 spin_unlock_irq(&port->inbuf_lock); in remove_port_data()
1496 spin_lock_irq(&port->outvq_lock); in remove_port_data()
1497 reclaim_consumed_buffers(port); in remove_port_data()
1498 spin_unlock_irq(&port->outvq_lock); in remove_port_data()
1506 static void unplug_port(struct port *port) in unplug_port() argument
1508 spin_lock_irq(&port->portdev->ports_lock); in unplug_port()
1509 list_del(&port->list); in unplug_port()
1510 spin_unlock_irq(&port->portdev->ports_lock); in unplug_port()
1512 spin_lock_irq(&port->inbuf_lock); in unplug_port()
1513 if (port->guest_connected) { in unplug_port()
1515 send_sigio_to_port(port); in unplug_port()
1518 port->guest_connected = false; in unplug_port()
1519 port->host_connected = false; in unplug_port()
1521 wake_up_interruptible(&port->waitqueue); in unplug_port()
1523 spin_unlock_irq(&port->inbuf_lock); in unplug_port()
1525 if (is_console_port(port)) { in unplug_port()
1527 list_del(&port->cons.list); in unplug_port()
1529 hvc_remove(port->cons.hvc); in unplug_port()
1530 ida_free(&vtermno_ida, port->cons.vtermno); in unplug_port()
1533 remove_port_data(port); in unplug_port()
1540 port->portdev = NULL; in unplug_port()
1542 sysfs_remove_group(&port->dev->kobj, &port_attribute_group); in unplug_port()
1543 device_destroy(pdrvdata.class, port->dev->devt); in unplug_port()
1544 cdev_del(port->cdev); in unplug_port()
1546 debugfs_remove(port->debugfs_file); in unplug_port()
1547 kfree(port->name); in unplug_port()
1554 kref_put(&port->kref, remove_port); in unplug_port()
1563 struct port *port; in handle_control_message() local
1569 port = find_port_by_id(portdev, virtio32_to_cpu(vdev, cpkt->id)); in handle_control_message()
1570 if (!port && in handle_control_message()
1580 if (port) { in handle_control_message()
1582 "Port %u already added\n", port->id); in handle_control_message()
1583 send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1); in handle_control_message()
1597 unplug_port(port); in handle_control_message()
1602 if (is_console_port(port)) in handle_control_message()
1605 init_port_console(port); in handle_control_message()
1618 if (!is_console_port(port)) in handle_control_message()
1623 set_console_size(port, size.rows, size.cols); in handle_control_message()
1625 port->cons.hvc->irq_requested = 1; in handle_control_message()
1626 resize_console(port); in handle_control_message()
1630 port->host_connected = virtio16_to_cpu(vdev, cpkt->value); in handle_control_message()
1631 wake_up_interruptible(&port->waitqueue); in handle_control_message()
1637 spin_lock_irq(&port->outvq_lock); in handle_control_message()
1638 reclaim_consumed_buffers(port); in handle_control_message()
1639 spin_unlock_irq(&port->outvq_lock); in handle_control_message()
1645 spin_lock_irq(&port->inbuf_lock); in handle_control_message()
1646 send_sigio_to_port(port); in handle_control_message()
1647 spin_unlock_irq(&port->inbuf_lock); in handle_control_message()
1654 if (port->name) in handle_control_message()
1663 port->name = kmalloc(name_size, GFP_KERNEL); in handle_control_message()
1664 if (!port->name) { in handle_control_message()
1665 dev_err(port->dev, in handle_control_message()
1669 strscpy(port->name, buf->buf + buf->offset + sizeof(*cpkt), in handle_control_message()
1676 err = sysfs_create_group(&port->dev->kobj, in handle_control_message()
1679 dev_err(port->dev, in handle_control_message()
1688 kobject_uevent(&port->dev->kobj, KOBJ_CHANGE); in handle_control_message()
1734 struct port *port; in out_intr() local
1736 port = find_port_by_vq(vq->vdev->priv, vq); in out_intr()
1737 if (!port) { in out_intr()
1742 wake_up_interruptible(&port->waitqueue); in out_intr()
1747 struct port *port; in in_intr() local
1750 port = find_port_by_vq(vq->vdev->priv, vq); in in_intr()
1751 if (!port) { in in_intr()
1756 spin_lock_irqsave(&port->inbuf_lock, flags); in in_intr()
1757 port->inbuf = get_inbuf(port); in in_intr()
1776 if (!port->guest_connected && !is_rproc_serial(port->portdev->vdev)) in in_intr()
1777 discard_port_data(port); in in_intr()
1780 send_sigio_to_port(port); in in_intr()
1782 spin_unlock_irqrestore(&port->inbuf_lock, flags); in in_intr()
1784 wake_up_interruptible(&port->waitqueue); in in_intr()
1786 if (is_console_port(port) && hvc_poll(port->cons.hvc)) in in_intr()
1815 struct port *port; in config_work_handler() local
1822 port = find_port_by_id(portdev, 0); in config_work_handler()
1823 set_console_size(port, rows, cols); in config_work_handler()
1832 resize_console(port); in config_work_handler()
1947 struct port *port, *port2; in virtcons_remove() local
1970 list_for_each_entry_safe(port, port2, &portdev->ports, list) in virtcons_remove()
1971 unplug_port(port); in virtcons_remove()
2149 struct port *port; in virtcons_freeze() local
2166 list_for_each_entry(port, &portdev->ports, list) { in virtcons_freeze()
2167 virtqueue_disable_cb(port->in_vq); in virtcons_freeze()
2168 virtqueue_disable_cb(port->out_vq); in virtcons_freeze()
2173 port->host_connected = false; in virtcons_freeze()
2174 remove_port_data(port); in virtcons_freeze()
2184 struct port *port; in virtcons_restore() local
2198 list_for_each_entry(port, &portdev->ports, list) { in virtcons_restore()
2199 port->in_vq = portdev->in_vqs[port->id]; in virtcons_restore()
2200 port->out_vq = portdev->out_vqs[port->id]; in virtcons_restore()
2202 fill_queue(port->in_vq, &port->inbuf_lock); in virtcons_restore()
2205 send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1); in virtcons_restore()
2211 if (port->guest_connected) in virtcons_restore()
2212 send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 1); in virtcons_restore()