Lines Matching +full:console +full:- +full:size
1 // SPDX-License-Identifier: GPL-2.0-or-later
28 #include <linux/dma-mapping.h>
44 /* Used for exporting per-port information to debugfs */
50 /* All the console devices handled by this driver */
57 .name = "virtio-ports",
63 /* This struct holds information that's relevant only for console ports */
64 struct console { struct
68 /* The hvc device associated with this console port */ argument
71 /* The size of the console */ argument
78 * differentiate between the other console ports handled by argument
89 /* size of the buffer in *buf above */
90 size_t size; member
114 * This is a per-device struct that stores data common to all the
115 * ports for that device (vdev->priv).
145 * guest->host transfers, one for host->guest transfers
150 * A control packet buffer for guest->host requests, protected
155 /* Array of per-port IO virtqueues */
166 /* This struct holds the per-port data */
202 * hooked up to an hvc console
204 struct console cons;
210 /* Reference-counting to handle port hot-unplugs and file operations */
237 struct console *cons; in find_port_by_vtermno()
242 if (cons->vtermno == vtermno) { in find_port_by_vtermno()
259 spin_lock_irqsave(&portdev->ports_lock, flags); in find_port_by_devt_in_portdev()
260 list_for_each_entry(port, &portdev->ports, list) { in find_port_by_devt_in_portdev()
261 if (port->cdev->dev == dev) { in find_port_by_devt_in_portdev()
262 kref_get(&port->kref); in find_port_by_devt_in_portdev()
268 spin_unlock_irqrestore(&portdev->ports_lock, flags); in find_port_by_devt_in_portdev()
296 spin_lock_irqsave(&portdev->ports_lock, flags); in find_port_by_id()
297 list_for_each_entry(port, &portdev->ports, list) in find_port_by_id()
298 if (port->id == id) in find_port_by_id()
302 spin_unlock_irqrestore(&portdev->ports_lock, flags); in find_port_by_id()
313 spin_lock_irqsave(&portdev->ports_lock, flags); in find_port_by_vq()
314 list_for_each_entry(port, &portdev->ports, list) in find_port_by_vq()
315 if (port->in_vq == vq || port->out_vq == vq) in find_port_by_vq()
319 spin_unlock_irqrestore(&portdev->ports_lock, flags); in find_port_by_vq()
325 if (port->cons.hvc) in is_console_port()
332 return is_rproc_enabled && vdev->id.device == VIRTIO_ID_RPROC_SERIAL; in is_rproc_serial()
341 if (!portdev->vdev) in use_multiport()
343 return __virtio_test_bit(portdev->vdev, VIRTIO_CONSOLE_F_MULTIPORT); in use_multiport()
353 for (i = 0; i < buf->sgpages; i++) { in free_buf()
354 struct page *page = sg_page(&buf->sg[i]); in free_buf()
360 if (!buf->dev) { in free_buf()
361 kfree(buf->buf); in free_buf()
367 /* queue up dma-buffers to be freed later */ in free_buf()
369 list_add_tail(&buf->list, &pending_free_dma_bufs); in free_buf()
373 dma_free_coherent(buf->dev, buf->size, buf->buf, buf->dma); in free_buf()
376 put_device(buf->dev); in free_buf()
399 list_del(&buf->list); in reclaim_dma_bufs()
419 buf->sgpages = pages; in alloc_buf()
421 buf->dev = NULL; in alloc_buf()
422 buf->buf = NULL; in alloc_buf()
433 buf->dev = vdev->dev.parent; in alloc_buf()
434 if (!buf->dev) in alloc_buf()
438 get_device(buf->dev); in alloc_buf()
439 buf->buf = dma_alloc_coherent(buf->dev, buf_size, &buf->dma, in alloc_buf()
442 buf->dev = NULL; in alloc_buf()
443 buf->buf = kmalloc(buf_size, GFP_KERNEL); in alloc_buf()
446 if (!buf->buf) in alloc_buf()
448 buf->len = 0; in alloc_buf()
449 buf->offset = 0; in alloc_buf()
450 buf->size = buf_size; in alloc_buf()
465 if (port->inbuf) in get_inbuf()
466 return port->inbuf; in get_inbuf()
468 buf = virtqueue_get_buf(port->in_vq, &len); in get_inbuf()
470 buf->len = min_t(size_t, len, buf->size); in get_inbuf()
471 buf->offset = 0; in get_inbuf()
472 port->stats.bytes_received += len; in get_inbuf()
478 * Create a scatter-gather list representing our input buffer and put
488 sg_init_one(sg, buf->buf, buf->size); in add_inbuf()
493 ret = vq->num_free; in add_inbuf()
503 if (!port->portdev) { in discard_port_data()
511 port->stats.bytes_discarded += buf->len - buf->offset; in discard_port_data()
512 if (add_inbuf(port->in_vq, buf) < 0) { in discard_port_data()
516 port->inbuf = NULL; in discard_port_data()
520 dev_warn(port->dev, "Errors adding %d buffers back to vq\n", in discard_port_data()
530 spin_lock_irqsave(&port->inbuf_lock, flags); in port_has_data()
531 port->inbuf = get_inbuf(port); in port_has_data()
532 if (port->inbuf) in port_has_data()
535 spin_unlock_irqrestore(&port->inbuf_lock, flags); in port_has_data()
549 vq = portdev->c_ovq; in __send_control_msg()
551 spin_lock(&portdev->c_ovq_lock); in __send_control_msg()
553 portdev->cpkt.id = cpu_to_virtio32(portdev->vdev, port_id); in __send_control_msg()
554 portdev->cpkt.event = cpu_to_virtio16(portdev->vdev, event); in __send_control_msg()
555 portdev->cpkt.value = cpu_to_virtio16(portdev->vdev, value); in __send_control_msg()
557 sg_init_one(sg, &portdev->cpkt, sizeof(struct virtio_console_control)); in __send_control_msg()
559 if (virtqueue_add_outbuf(vq, sg, 1, &portdev->cpkt, GFP_ATOMIC) == 0) { in __send_control_msg()
566 spin_unlock(&portdev->c_ovq_lock); in __send_control_msg()
574 if (port->portdev) in send_control_msg()
575 return __send_control_msg(port->portdev, port->id, event, value); in send_control_msg()
580 /* Callers must take the port->outvq_lock */
586 if (!port->portdev) { in reclaim_consumed_buffers()
590 while ((buf = virtqueue_get_buf(port->out_vq, &len))) { in reclaim_consumed_buffers()
592 port->outvq_full = false; in reclaim_consumed_buffers()
605 out_vq = port->out_vq; in __send_to_port()
607 spin_lock_irqsave(&port->outvq_lock, flags); in __send_to_port()
621 if (out_vq->num_free == 0) in __send_to_port()
622 port->outvq_full = true; in __send_to_port()
634 * console driver writes something out. in __send_to_port()
640 spin_unlock_irqrestore(&port->outvq_lock, flags); in __send_to_port()
642 port->stats.bytes_sent += in_count; in __send_to_port()
644 * We're expected to return the amount of data we wrote -- all in __send_to_port()
663 buf = port->inbuf; in fill_readbuf()
664 out_count = min(out_count, buf->len - buf->offset); in fill_readbuf()
669 ret = copy_to_user(out_buf, buf->buf + buf->offset, out_count); in fill_readbuf()
671 return -EFAULT; in fill_readbuf()
673 memcpy((__force u8 *)out_buf, buf->buf + buf->offset, in fill_readbuf()
677 buf->offset += out_count; in fill_readbuf()
679 if (buf->offset == buf->len) { in fill_readbuf()
682 * Re-queue so that the Host can send us more data. in fill_readbuf()
684 spin_lock_irqsave(&port->inbuf_lock, flags); in fill_readbuf()
685 port->inbuf = NULL; in fill_readbuf()
687 if (add_inbuf(port->in_vq, buf) < 0) in fill_readbuf()
688 dev_warn(port->dev, "failed add_buf\n"); in fill_readbuf()
690 spin_unlock_irqrestore(&port->inbuf_lock, flags); in fill_readbuf()
699 if (!port->guest_connected) { in will_read_block()
700 /* Port got hot-unplugged. Let's exit. */ in will_read_block()
703 return !port_has_data(port) && port->host_connected; in will_read_block()
710 if (!port->guest_connected) { in will_write_block()
711 /* Port got hot-unplugged. Let's exit. */ in will_write_block()
714 if (!port->host_connected) in will_write_block()
717 spin_lock_irq(&port->outvq_lock); in will_write_block()
723 ret = port->outvq_full; in will_write_block()
724 spin_unlock_irq(&port->outvq_lock); in will_write_block()
735 port = filp->private_data; in port_fops_read()
737 /* Port is hot-unplugged. */ in port_fops_read()
738 if (!port->guest_connected) in port_fops_read()
739 return -ENODEV; in port_fops_read()
747 if (!port->host_connected) in port_fops_read()
749 if (filp->f_flags & O_NONBLOCK) in port_fops_read()
750 return -EAGAIN; in port_fops_read()
752 ret = wait_event_freezable(port->waitqueue, in port_fops_read()
757 /* Port got hot-unplugged while we were waiting above. */ in port_fops_read()
758 if (!port->guest_connected) in port_fops_read()
759 return -ENODEV; in port_fops_read()
770 if (!port_has_data(port) && !port->host_connected) in port_fops_read()
782 return -EAGAIN; in wait_port_writable()
784 ret = wait_event_freezable(port->waitqueue, in wait_port_writable()
789 /* Port got hot-unplugged. */ in wait_port_writable()
790 if (!port->guest_connected) in wait_port_writable()
791 return -ENODEV; in wait_port_writable()
809 port = filp->private_data; in port_fops_write()
811 nonblock = filp->f_flags & O_NONBLOCK; in port_fops_write()
819 buf = alloc_buf(port->portdev->vdev, count, 0); in port_fops_write()
821 return -ENOMEM; in port_fops_write()
823 ret = copy_from_user(buf->buf, ubuf, count); in port_fops_write()
825 ret = -EFAULT; in port_fops_write()
830 * We now ask send_buf() to not spin for generic ports -- we in port_fops_write()
831 * can re-use the same code path that non-blocking file in port_fops_write()
837 sg_init_one(sg, buf->buf, count); in port_fops_write()
851 unsigned int size; member
859 struct sg_list *sgl = sd->u.data; in pipe_to_sg()
862 if (sgl->n == sgl->size) in pipe_to_sg()
868 get_page(buf->page); in pipe_to_sg()
869 unlock_page(buf->page); in pipe_to_sg()
871 len = min(buf->len, sd->len); in pipe_to_sg()
872 sg_set_page(&(sgl->sg[sgl->n]), buf->page, len, buf->offset); in pipe_to_sg()
879 return -ENOMEM; in pipe_to_sg()
881 offset = sd->pos & ~PAGE_MASK; in pipe_to_sg()
883 len = sd->len; in pipe_to_sg()
885 len = PAGE_SIZE - offset; in pipe_to_sg()
887 src = kmap_local_page(buf->page); in pipe_to_sg()
888 memcpy(page_address(page) + offset, src + buf->offset, len); in pipe_to_sg()
891 sg_set_page(&(sgl->sg[sgl->n]), page, len, offset); in pipe_to_sg()
893 sgl->n++; in pipe_to_sg()
894 sgl->len += len; in pipe_to_sg()
899 /* Faster zero-copy write by splicing */
904 struct port *port = filp->private_data; in port_fops_splice_write()
918 * pipe_to_sg() must allocate dma-buffers and copy content from in port_fops_splice_write()
920 * support allocating and freeing such a list of dma-buffers. in port_fops_splice_write()
922 if (is_rproc_serial(port->out_vq->vdev)) in port_fops_splice_write()
923 return -EINVAL; in port_fops_splice_write()
930 ret = wait_port_writable(port, filp->f_flags & O_NONBLOCK); in port_fops_splice_write()
935 buf = alloc_buf(port->portdev->vdev, 0, occupancy); in port_fops_splice_write()
938 ret = -ENOMEM; in port_fops_splice_write()
944 sgl.size = occupancy; in port_fops_splice_write()
945 sgl.sg = buf->sg; in port_fops_splice_write()
946 sg_init_table(sgl.sg, sgl.size); in port_fops_splice_write()
950 ret = __send_to_port(port, buf->sg, sgl.n, sgl.len, buf, true); in port_fops_splice_write()
966 port = filp->private_data; in port_fops_poll()
967 poll_wait(filp, &port->waitqueue, wait); in port_fops_poll()
969 if (!port->guest_connected) { in port_fops_poll()
978 if (!port->host_connected) in port_fops_poll()
990 port = filp->private_data; in port_fops_release()
995 spin_lock_irq(&port->inbuf_lock); in port_fops_release()
996 port->guest_connected = false; in port_fops_release()
1000 spin_unlock_irq(&port->inbuf_lock); in port_fops_release()
1002 spin_lock_irq(&port->outvq_lock); in port_fops_release()
1004 spin_unlock_irq(&port->outvq_lock); in port_fops_release()
1015 kref_put(&port->kref, remove_port); in port_fops_release()
1022 struct cdev *cdev = inode->i_cdev; in port_fops_open()
1027 port = find_port_by_devt(cdev->dev); in port_fops_open()
1030 return -ENXIO; in port_fops_open()
1032 filp->private_data = port; in port_fops_open()
1035 * Don't allow opening of console port devices -- that's done in port_fops_open()
1039 ret = -ENXIO; in port_fops_open()
1044 spin_lock_irq(&port->inbuf_lock); in port_fops_open()
1045 if (port->guest_connected) { in port_fops_open()
1046 spin_unlock_irq(&port->inbuf_lock); in port_fops_open()
1047 ret = -EBUSY; in port_fops_open()
1051 port->guest_connected = true; in port_fops_open()
1052 spin_unlock_irq(&port->inbuf_lock); in port_fops_open()
1054 spin_lock_irq(&port->outvq_lock); in port_fops_open()
1061 spin_unlock_irq(&port->outvq_lock); in port_fops_open()
1066 send_control_msg(filp->private_data, VIRTIO_CONSOLE_PORT_OPEN, 1); in port_fops_open()
1070 kref_put(&port->kref, remove_port); in port_fops_open()
1078 port = filp->private_data; in port_fops_fasync()
1079 return fasync_helper(fd, filp, mode, &port->async_queue); in port_fops_fasync()
1084 * a console device, read from it, write to it, poll for data and
1102 * We turn the characters into a scatter-gather list, add it to the
1116 return -EPIPE; in put_chars()
1120 return -ENOMEM; in put_chars()
1141 return -EPIPE; in get_chars()
1144 BUG_ON(!port->in_vq); in get_chars()
1153 /* The port could have been hot-unplugged */ in resize_console()
1157 vdev = port->portdev->vdev; in resize_console()
1162 hvc_resize(port->cons.hvc, port->cons.ws); in resize_console()
1170 port = find_port_by_vtermno(hp->vtermno); in notifier_add_vio()
1172 return -EINVAL; in notifier_add_vio()
1174 hp->irq_requested = 1; in notifier_add_vio()
1182 hp->irq_requested = 0; in notifier_del_vio()
1185 /* The operations for console ports. */
1199 * The Host's telling us this port is a console port. Hook it in init_port_console()
1200 * up with an hvc console. in init_port_console()
1202 * To set up and manage our virtual console, we call in init_port_console()
1205 * The first argument of hvc_alloc() is the virtual console in init_port_console()
1212 * pointers. The final argument is the output buffer size: we in init_port_console()
1213 * can do any size, so we put PAGE_SIZE here. in init_port_console()
1219 port->cons.vtermno = ret; in init_port_console()
1220 port->cons.hvc = hvc_alloc(port->cons.vtermno, 0, &hv_ops, PAGE_SIZE); in init_port_console()
1221 if (IS_ERR(port->cons.hvc)) { in init_port_console()
1222 ret = PTR_ERR(port->cons.hvc); in init_port_console()
1223 dev_err(port->dev, in init_port_console()
1225 port->cons.hvc = NULL; in init_port_console()
1226 ida_free(&vtermno_ida, port->cons.vtermno); in init_port_console()
1230 list_add_tail(&port->cons.list, &pdrvdata.consoles); in init_port_console()
1232 port->guest_connected = true; in init_port_console()
1247 return sprintf(buffer, "%s\n", port->name); in show_port_name()
1264 struct port *port = s->private; in port_debugfs_show()
1266 seq_printf(s, "name: %s\n", port->name ? port->name : ""); in port_debugfs_show()
1267 seq_printf(s, "guest_connected: %d\n", port->guest_connected); in port_debugfs_show()
1268 seq_printf(s, "host_connected: %d\n", port->host_connected); in port_debugfs_show()
1269 seq_printf(s, "outvq_full: %d\n", port->outvq_full); in port_debugfs_show()
1270 seq_printf(s, "bytes_sent: %lu\n", port->stats.bytes_sent); in port_debugfs_show()
1271 seq_printf(s, "bytes_received: %lu\n", port->stats.bytes_received); in port_debugfs_show()
1272 seq_printf(s, "bytes_discarded: %lu\n", port->stats.bytes_discarded); in port_debugfs_show()
1274 seq_printf(s, "console_vtermno: %u\n", port->cons.vtermno); in port_debugfs_show()
1286 port->cons.ws.ws_row = rows; in set_console_size()
1287 port->cons.ws.ws_col = cols; in set_console_size()
1298 buf = alloc_buf(vq->vdev, PAGE_SIZE, 0); in fill_queue()
1300 return -ENOMEM; in fill_queue()
1318 if (port->async_queue && port->guest_connected) in send_sigio_to_port()
1319 kill_fasync(&port->async_queue, SIGIO, POLL_OUT); in send_sigio_to_port()
1330 err = -ENOMEM; in add_port()
1333 kref_init(&port->kref); in add_port()
1335 port->portdev = portdev; in add_port()
1336 port->id = id; in add_port()
1338 port->name = NULL; in add_port()
1339 port->inbuf = NULL; in add_port()
1340 port->cons.hvc = NULL; in add_port()
1341 port->async_queue = NULL; in add_port()
1343 port->cons.ws.ws_row = port->cons.ws.ws_col = 0; in add_port()
1344 port->cons.vtermno = 0; in add_port()
1346 port->host_connected = port->guest_connected = false; in add_port()
1347 port->stats = (struct port_stats) { 0 }; in add_port()
1349 port->outvq_full = false; in add_port()
1351 port->in_vq = portdev->in_vqs[port->id]; in add_port()
1352 port->out_vq = portdev->out_vqs[port->id]; in add_port()
1354 port->cdev = cdev_alloc(); in add_port()
1355 if (!port->cdev) { in add_port()
1356 dev_err(&port->portdev->vdev->dev, "Error allocating cdev\n"); in add_port()
1357 err = -ENOMEM; in add_port()
1360 port->cdev->ops = &port_fops; in add_port()
1362 devt = MKDEV(portdev->chr_major, id); in add_port()
1363 err = cdev_add(port->cdev, devt, 1); in add_port()
1365 dev_err(&port->portdev->vdev->dev, in add_port()
1369 port->dev = device_create(&port_class, &port->portdev->vdev->dev, in add_port()
1371 port->portdev->vdev->index, id); in add_port()
1372 if (IS_ERR(port->dev)) { in add_port()
1373 err = PTR_ERR(port->dev); in add_port()
1374 dev_err(&port->portdev->vdev->dev, in add_port()
1380 spin_lock_init(&port->inbuf_lock); in add_port()
1381 spin_lock_init(&port->outvq_lock); in add_port()
1382 init_waitqueue_head(&port->waitqueue); in add_port()
1388 err = fill_queue(port->in_vq, &port->inbuf_lock); in add_port()
1389 if (err < 0 && err != -ENOSPC) { in add_port()
1390 dev_err(port->dev, "Error allocating inbufs\n"); in add_port()
1394 if (is_rproc_serial(port->portdev->vdev)) in add_port()
1397 * rproc_serial does not want the console port, only in add_port()
1400 port->host_connected = true; in add_port()
1401 else if (!use_multiport(port->portdev)) { in add_port()
1404 * this has to be a console port. in add_port()
1411 spin_lock_irq(&portdev->ports_lock); in add_port()
1412 list_add_tail(&port->list, &port->portdev->ports); in add_port()
1413 spin_unlock_irq(&portdev->ports_lock); in add_port()
1418 * caching, whether this is a console port, etc.) in add_port()
1426 port->debugfs_file = debugfs_create_file(dev_name(port->dev), 0444, in add_port()
1433 device_destroy(&port_class, port->dev->devt); in add_port()
1435 cdev_del(port->cdev); in add_port()
1444 /* No users remain, remove all port-specific data. */
1456 spin_lock_irq(&port->inbuf_lock); in remove_port_data()
1459 spin_unlock_irq(&port->inbuf_lock); in remove_port_data()
1461 spin_lock_irq(&port->outvq_lock); in remove_port_data()
1463 spin_unlock_irq(&port->outvq_lock); in remove_port_data()
1473 spin_lock_irq(&port->portdev->ports_lock); in unplug_port()
1474 list_del(&port->list); in unplug_port()
1475 spin_unlock_irq(&port->portdev->ports_lock); in unplug_port()
1477 spin_lock_irq(&port->inbuf_lock); in unplug_port()
1478 if (port->guest_connected) { in unplug_port()
1483 port->guest_connected = false; in unplug_port()
1484 port->host_connected = false; in unplug_port()
1486 wake_up_interruptible(&port->waitqueue); in unplug_port()
1488 spin_unlock_irq(&port->inbuf_lock); in unplug_port()
1492 list_del(&port->cons.list); in unplug_port()
1494 hvc_remove(port->cons.hvc); in unplug_port()
1495 ida_free(&vtermno_ida, port->cons.vtermno); in unplug_port()
1501 * We should just assume the device itself has gone off -- in unplug_port()
1505 port->portdev = NULL; in unplug_port()
1507 sysfs_remove_group(&port->dev->kobj, &port_attribute_group); in unplug_port()
1508 device_destroy(&port_class, port->dev->devt); in unplug_port()
1509 cdev_del(port->cdev); in unplug_port()
1511 debugfs_remove(port->debugfs_file); in unplug_port()
1512 kfree(port->name); in unplug_port()
1515 * Locks around here are not necessary - a port can't be in unplug_port()
1519 kref_put(&port->kref, remove_port); in unplug_port()
1532 cpkt = (struct virtio_console_control *)(buf->buf + buf->offset); in handle_control_message()
1534 port = find_port_by_id(portdev, virtio32_to_cpu(vdev, cpkt->id)); in handle_control_message()
1536 cpkt->event != cpu_to_virtio16(vdev, VIRTIO_CONSOLE_PORT_ADD)) { in handle_control_message()
1538 dev_dbg(&portdev->vdev->dev, in handle_control_message()
1539 "Invalid index %u in control packet\n", cpkt->id); in handle_control_message()
1543 switch (virtio16_to_cpu(vdev, cpkt->event)) { in handle_control_message()
1546 dev_dbg(&portdev->vdev->dev, in handle_control_message()
1547 "Port %u already added\n", port->id); in handle_control_message()
1551 if (virtio32_to_cpu(vdev, cpkt->id) >= in handle_control_message()
1552 portdev->max_nr_ports) { in handle_control_message()
1553 dev_warn(&portdev->vdev->dev, in handle_control_message()
1555 "out-of-bound id %u, max. supported id: %u\n", in handle_control_message()
1556 cpkt->id, portdev->max_nr_ports - 1); in handle_control_message()
1559 add_port(portdev, virtio32_to_cpu(vdev, cpkt->id)); in handle_control_message()
1565 if (!cpkt->value) in handle_control_message()
1573 * Could remove the port here in case init fails - but in handle_control_message()
1581 } size; in handle_control_message() local
1586 memcpy(&size, buf->buf + buf->offset + sizeof(*cpkt), in handle_control_message()
1587 sizeof(size)); in handle_control_message()
1588 set_console_size(port, virtio16_to_cpu(vdev, size.rows), in handle_control_message()
1589 virtio16_to_cpu(vdev, size.cols)); in handle_control_message()
1591 port->cons.hvc->irq_requested = 1; in handle_control_message()
1596 port->host_connected = virtio16_to_cpu(vdev, cpkt->value); in handle_control_message()
1597 wake_up_interruptible(&port->waitqueue); in handle_control_message()
1603 spin_lock_irq(&port->outvq_lock); in handle_control_message()
1605 spin_unlock_irq(&port->outvq_lock); in handle_control_message()
1611 spin_lock_irq(&port->inbuf_lock); in handle_control_message()
1613 spin_unlock_irq(&port->inbuf_lock); in handle_control_message()
1620 if (port->name) in handle_control_message()
1624 * Skip the size of the header and the cpkt to get the size in handle_control_message()
1627 name_size = buf->len - buf->offset - sizeof(*cpkt) + 1; in handle_control_message()
1629 port->name = kmalloc(name_size, GFP_KERNEL); in handle_control_message()
1630 if (!port->name) { in handle_control_message()
1631 dev_err(port->dev, in handle_control_message()
1635 strscpy(port->name, buf->buf + buf->offset + sizeof(*cpkt), in handle_control_message()
1642 err = sysfs_create_group(&port->dev->kobj, in handle_control_message()
1645 dev_err(port->dev, in handle_control_message()
1654 kobject_uevent(&port->dev->kobj, KOBJ_CHANGE); in handle_control_message()
1668 vq = portdev->c_ivq; in control_work_handler()
1670 spin_lock(&portdev->c_ivq_lock); in control_work_handler()
1672 spin_unlock(&portdev->c_ivq_lock); in control_work_handler()
1674 buf->len = min_t(size_t, len, buf->size); in control_work_handler()
1675 buf->offset = 0; in control_work_handler()
1677 handle_control_message(vq->vdev, portdev, buf); in control_work_handler()
1679 spin_lock(&portdev->c_ivq_lock); in control_work_handler()
1680 if (add_inbuf(portdev->c_ivq, buf) < 0) { in control_work_handler()
1681 dev_warn(&portdev->vdev->dev, in control_work_handler()
1686 spin_unlock(&portdev->c_ivq_lock); in control_work_handler()
1702 port = find_port_by_vq(vq->vdev->priv, vq); in out_intr()
1708 wake_up_interruptible(&port->waitqueue); in out_intr()
1716 port = find_port_by_vq(vq->vdev->priv, vq); in in_intr()
1722 spin_lock_irqsave(&port->inbuf_lock, flags); in in_intr()
1723 port->inbuf = get_inbuf(port); in in_intr()
1729 * can be reached when a console port is not yet connected (no in in_intr()
1735 * while console ports and rproc-serial ports accepts data at in in_intr()
1736 * any time. rproc-serial is initiated with guest_connected to in in_intr()
1737 * false because port_fops_open expects this. Console ports are in in_intr()
1738 * hooked up with an HVC console and is initialized with in in_intr()
1742 if (!port->guest_connected && !is_rproc_serial(port->portdev->vdev)) in in_intr()
1748 spin_unlock_irqrestore(&port->inbuf_lock, flags); in in_intr()
1750 wake_up_interruptible(&port->waitqueue); in in_intr()
1752 if (is_console_port(port) && hvc_poll(port->cons.hvc)) in in_intr()
1760 portdev = vq->vdev->priv; in control_intr()
1761 schedule_work(&portdev->control_work); in control_intr()
1768 portdev = vdev->priv; in config_intr()
1771 schedule_work(&portdev->config_work); in config_intr()
1784 vdev = portdev->vdev; in config_work_handler()
1795 * to indicate console size changes so that it can be in config_work_handler()
1796 * done per-port. in config_work_handler()
1809 nr_ports = portdev->max_nr_ports; in init_vqs()
1814 portdev->in_vqs = kmalloc_array(nr_ports, sizeof(struct virtqueue *), in init_vqs()
1816 portdev->out_vqs = kmalloc_array(nr_ports, sizeof(struct virtqueue *), in init_vqs()
1818 if (!vqs || !vqs_info || !portdev->in_vqs || !portdev->out_vqs) { in init_vqs()
1819 err = -ENOMEM; in init_vqs()
1825 * spawns a console port first and also inits the vqs for port in init_vqs()
1837 vqs_info[j].name = "control-i"; in init_vqs()
1838 vqs_info[j + 1].name = "control-o"; in init_vqs()
1849 err = virtio_find_vqs(portdev->vdev, nr_queues, vqs, vqs_info, NULL); in init_vqs()
1854 portdev->in_vqs[0] = vqs[0]; in init_vqs()
1855 portdev->out_vqs[0] = vqs[1]; in init_vqs()
1858 portdev->c_ivq = vqs[j]; in init_vqs()
1859 portdev->c_ovq = vqs[j + 1]; in init_vqs()
1863 portdev->in_vqs[i] = vqs[j]; in init_vqs()
1864 portdev->out_vqs[i] = vqs[j + 1]; in init_vqs()
1873 kfree(portdev->out_vqs); in init_vqs()
1874 kfree(portdev->in_vqs); in init_vqs()
1889 virtio_device_for_each_vq(portdev->vdev, vq) { in remove_vqs()
1897 portdev->vdev->config->del_vqs(portdev->vdev); in remove_vqs()
1898 kfree(portdev->in_vqs); in remove_vqs()
1899 kfree(portdev->out_vqs); in remove_vqs()
1907 portdev = vdev->priv; in virtcons_remove()
1910 list_del(&portdev->list); in virtcons_remove()
1916 flush_work(&portdev->control_work); in virtcons_remove()
1918 flush_work(&portdev->config_work); in virtcons_remove()
1924 cancel_work_sync(&portdev->control_work); in virtcons_remove()
1926 cancel_work_sync(&portdev->config_work); in virtcons_remove()
1928 list_for_each_entry_safe(port, port2, &portdev->ports, list) in virtcons_remove()
1931 unregister_chrdev(portdev->chr_major, "virtio-portsdev"); in virtcons_remove()
1935 * (device-side) queues. So there's no point in keeping the in virtcons_remove()
1949 * If the host also supports multiple console ports, we check the
1960 if (!vdev->config->get && in virtcons_probe()
1963 dev_err(&vdev->dev, "%s failure: config access disabled\n", in virtcons_probe()
1965 return -EINVAL; in virtcons_probe()
1970 err = -ENOMEM; in virtcons_probe()
1974 /* Attach this portdev to this virtio_device, and vice-versa. */ in virtcons_probe()
1975 portdev->vdev = vdev; in virtcons_probe()
1976 vdev->priv = portdev; in virtcons_probe()
1978 portdev->chr_major = register_chrdev(0, "virtio-portsdev", in virtcons_probe()
1980 if (portdev->chr_major < 0) { in virtcons_probe()
1981 dev_err(&vdev->dev, in virtcons_probe()
1983 portdev->chr_major, vdev->index); in virtcons_probe()
1984 err = portdev->chr_major; in virtcons_probe()
1989 portdev->max_nr_ports = 1; in virtcons_probe()
1995 &portdev->max_nr_ports) == 0) { in virtcons_probe()
1996 if (portdev->max_nr_ports == 0 || in virtcons_probe()
1997 portdev->max_nr_ports > VIRTCONS_MAX_PORTS) { in virtcons_probe()
1998 dev_err(&vdev->dev, in virtcons_probe()
2000 portdev->max_nr_ports); in virtcons_probe()
2001 err = -EINVAL; in virtcons_probe()
2007 spin_lock_init(&portdev->ports_lock); in virtcons_probe()
2008 INIT_LIST_HEAD(&portdev->ports); in virtcons_probe()
2009 INIT_LIST_HEAD(&portdev->list); in virtcons_probe()
2011 INIT_WORK(&portdev->config_work, &config_work_handler); in virtcons_probe()
2012 INIT_WORK(&portdev->control_work, &control_work_handler); in virtcons_probe()
2015 spin_lock_init(&portdev->c_ivq_lock); in virtcons_probe()
2016 spin_lock_init(&portdev->c_ovq_lock); in virtcons_probe()
2021 dev_err(&vdev->dev, "Error %d initializing vqs\n", err); in virtcons_probe()
2025 virtio_device_ready(portdev->vdev); in virtcons_probe()
2028 err = fill_queue(portdev->c_ivq, &portdev->c_ivq_lock); in virtcons_probe()
2030 dev_err(&vdev->dev, in virtcons_probe()
2044 * For backward compatibility: Create a console port in virtcons_probe()
2051 list_add_tail(&portdev->list, &pdrvdata.portdevs); in virtcons_probe()
2060 unregister_chrdev(portdev->chr_major, "virtio-portsdev"); in virtcons_probe()
2095 portdev = vdev->priv; in virtcons_freeze()
2100 virtqueue_disable_cb(portdev->c_ivq); in virtcons_freeze()
2101 cancel_work_sync(&portdev->control_work); in virtcons_freeze()
2102 cancel_work_sync(&portdev->config_work); in virtcons_freeze()
2108 virtqueue_disable_cb(portdev->c_ivq); in virtcons_freeze()
2110 list_for_each_entry(port, &portdev->ports, list) { in virtcons_freeze()
2111 virtqueue_disable_cb(port->in_vq); in virtcons_freeze()
2112 virtqueue_disable_cb(port->out_vq); in virtcons_freeze()
2117 port->host_connected = false; in virtcons_freeze()
2131 portdev = vdev->priv; in virtcons_restore()
2137 virtio_device_ready(portdev->vdev); in virtcons_restore()
2140 fill_queue(portdev->c_ivq, &portdev->c_ivq_lock); in virtcons_restore()
2142 list_for_each_entry(port, &portdev->ports, list) { in virtcons_restore()
2143 port->in_vq = portdev->in_vqs[port->id]; in virtcons_restore()
2144 port->out_vq = portdev->out_vqs[port->id]; in virtcons_restore()
2146 fill_queue(port->in_vq, &port->inbuf_lock); in virtcons_restore()
2155 if (port->guest_connected) in virtcons_restore()
2193 pdrvdata.debugfs_dir = debugfs_create_dir("virtio-ports", NULL); in virtio_console_init()
2230 MODULE_DESCRIPTION("Virtio console driver");