2 * virtio ccw target implementation
4 * Copyright 2012 IBM Corp.
5 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
7 * This work is licensed under the terms of the GNU GPL, version 2 or (at
8 * your option) any later version. See the COPYING file in the top-level
13 #include "block/block.h"
14 #include "sysemu/blockdev.h"
15 #include "sysemu/sysemu.h"
17 #include "monitor/monitor.h"
18 #include "hw/virtio/virtio.h"
19 #include "hw/virtio/virtio-serial.h"
20 #include "hw/virtio/virtio-net.h"
21 #include "hw/sysbus.h"
22 #include "qemu/bitops.h"
23 #include "hw/virtio/virtio-bus.h"
27 #include "virtio-ccw.h"
30 static void virtio_ccw_bus_new(VirtioBusState
*bus
, VirtioCcwDevice
*dev
);
32 static int virtual_css_bus_reset(BusState
*qbus
)
34 /* This should actually be modelled via the generic css */
37 /* we dont traverse ourself, return 0 */
42 static void virtual_css_bus_class_init(ObjectClass
*klass
, void *data
)
44 BusClass
*k
= BUS_CLASS(klass
);
46 k
->reset
= virtual_css_bus_reset
;
49 static const TypeInfo virtual_css_bus_info
= {
50 .name
= TYPE_VIRTUAL_CSS_BUS
,
52 .instance_size
= sizeof(VirtualCssBus
),
53 .class_init
= virtual_css_bus_class_init
,
56 VirtIODevice
*virtio_ccw_get_vdev(SubchDev
*sch
)
58 VirtIODevice
*vdev
= NULL
;
60 if (sch
->driver_data
) {
61 vdev
= ((VirtioCcwDevice
*)sch
->driver_data
)->vdev
;
66 static int virtio_ccw_set_guest2host_notifier(VirtioCcwDevice
*dev
, int n
,
67 bool assign
, bool set_handler
)
69 VirtQueue
*vq
= virtio_get_queue(dev
->vdev
, n
);
70 EventNotifier
*notifier
= virtio_queue_get_host_notifier(vq
);
72 SubchDev
*sch
= dev
->sch
;
73 uint32_t sch_id
= (css_build_subchannel_id(sch
) << 16) | sch
->schid
;
76 r
= event_notifier_init(notifier
, 1);
78 error_report("%s: unable to init event notifier: %d", __func__
, r
);
81 virtio_queue_set_host_notifier_fd_handler(vq
, true, set_handler
);
82 r
= s390_assign_subch_ioeventfd(notifier
, sch_id
, n
, assign
);
84 error_report("%s: unable to assign ioeventfd: %d", __func__
, r
);
85 virtio_queue_set_host_notifier_fd_handler(vq
, false, false);
86 event_notifier_cleanup(notifier
);
90 virtio_queue_set_host_notifier_fd_handler(vq
, false, false);
91 s390_assign_subch_ioeventfd(notifier
, sch_id
, n
, assign
);
92 event_notifier_cleanup(notifier
);
97 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice
*dev
)
101 if (!(dev
->flags
& VIRTIO_CCW_FLAG_USE_IOEVENTFD
) ||
102 dev
->ioeventfd_disabled
||
103 dev
->ioeventfd_started
) {
106 for (n
= 0; n
< VIRTIO_PCI_QUEUE_MAX
; n
++) {
107 if (!virtio_queue_get_num(dev
->vdev
, n
)) {
110 r
= virtio_ccw_set_guest2host_notifier(dev
, n
, true, true);
115 dev
->ioeventfd_started
= true;
120 if (!virtio_queue_get_num(dev
->vdev
, n
)) {
123 r
= virtio_ccw_set_guest2host_notifier(dev
, n
, false, false);
126 dev
->ioeventfd_started
= false;
127 /* Disable ioeventfd for this device. */
128 dev
->flags
&= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD
;
129 error_report("%s: failed. Fallback to userspace (slower).", __func__
);
132 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice
*dev
)
136 if (!dev
->ioeventfd_started
) {
139 for (n
= 0; n
< VIRTIO_PCI_QUEUE_MAX
; n
++) {
140 if (!virtio_queue_get_num(dev
->vdev
, n
)) {
143 r
= virtio_ccw_set_guest2host_notifier(dev
, n
, false, false);
146 dev
->ioeventfd_started
= false;
149 VirtualCssBus
*virtual_css_bus_init(void)
155 /* Create bridge device */
156 dev
= qdev_create(NULL
, "virtual-css-bridge");
157 qdev_init_nofail(dev
);
159 /* Create bus on bridge device */
160 bus
= qbus_create(TYPE_VIRTUAL_CSS_BUS
, dev
, "virtual-css");
161 cbus
= VIRTUAL_CSS_BUS(bus
);
163 /* Enable hotplugging */
164 bus
->allow_hotplug
= 1;
169 /* Communication blocks used by several channel commands. */
170 typedef struct VqInfoBlock
{
175 } QEMU_PACKED VqInfoBlock
;
177 typedef struct VqConfigBlock
{
180 } QEMU_PACKED VqConfigBlock
;
182 typedef struct VirtioFeatDesc
{
185 } QEMU_PACKED VirtioFeatDesc
;
187 /* Specify where the virtqueues for the subchannel are in guest memory. */
188 static int virtio_ccw_set_vqs(SubchDev
*sch
, uint64_t addr
, uint32_t align
,
189 uint16_t index
, uint16_t num
)
191 VirtioCcwDevice
*dev
= sch
->driver_data
;
193 if (index
> VIRTIO_PCI_QUEUE_MAX
) {
197 /* Current code in virtio.c relies on 4K alignment. */
198 if (addr
&& (align
!= 4096)) {
206 virtio_queue_set_addr(dev
->vdev
, index
, addr
);
208 virtio_queue_set_vector(dev
->vdev
, index
, 0);
210 /* Fail if we don't have a big enough queue. */
211 /* TODO: Add interface to handle vring.num changing */
212 if (virtio_queue_get_num(dev
->vdev
, index
) > num
) {
215 virtio_queue_set_vector(dev
->vdev
, index
, index
);
217 /* tell notify handler in case of config change */
218 dev
->vdev
->config_vector
= VIRTIO_PCI_QUEUE_MAX
;
222 static int virtio_ccw_cb(SubchDev
*sch
, CCW1 ccw
)
227 VirtioFeatDesc features
;
230 VqConfigBlock vq_config
;
231 VirtioCcwDevice
*dev
= sch
->driver_data
;
240 trace_virtio_ccw_interpret_ccw(sch
->cssid
, sch
->ssid
, sch
->schid
,
242 check_len
= !((ccw
.flags
& CCW_FLAG_SLI
) && !(ccw
.flags
& CCW_FLAG_DC
));
244 /* Look at the command. */
245 switch (ccw
.cmd_code
) {
248 if (ccw
.count
!= sizeof(info
)) {
252 } else if (ccw
.count
< sizeof(info
)) {
253 /* Can't execute command. */
260 info
.queue
= ldq_phys(ccw
.cda
);
261 info
.align
= ldl_phys(ccw
.cda
+ sizeof(info
.queue
));
262 info
.index
= lduw_phys(ccw
.cda
+ sizeof(info
.queue
)
263 + sizeof(info
.align
));
264 info
.num
= lduw_phys(ccw
.cda
+ sizeof(info
.queue
)
266 + sizeof(info
.index
));
267 ret
= virtio_ccw_set_vqs(sch
, info
.queue
, info
.align
, info
.index
,
269 sch
->curr_status
.scsw
.count
= 0;
272 case CCW_CMD_VDEV_RESET
:
273 virtio_ccw_stop_ioeventfd(dev
);
274 virtio_reset(dev
->vdev
);
277 case CCW_CMD_READ_FEAT
:
279 if (ccw
.count
!= sizeof(features
)) {
283 } else if (ccw
.count
< sizeof(features
)) {
284 /* Can't execute command. */
291 features
.index
= ldub_phys(ccw
.cda
+ sizeof(features
.features
));
292 if (features
.index
< ARRAY_SIZE(dev
->host_features
)) {
293 features
.features
= dev
->host_features
[features
.index
];
295 /* Return zeroes if the guest supports more feature bits. */
296 features
.features
= 0;
298 stl_le_phys(ccw
.cda
, features
.features
);
299 sch
->curr_status
.scsw
.count
= ccw
.count
- sizeof(features
);
303 case CCW_CMD_WRITE_FEAT
:
305 if (ccw
.count
!= sizeof(features
)) {
309 } else if (ccw
.count
< sizeof(features
)) {
310 /* Can't execute command. */
317 features
.index
= ldub_phys(ccw
.cda
+ sizeof(features
.features
));
318 features
.features
= ldl_le_phys(ccw
.cda
);
319 if (features
.index
< ARRAY_SIZE(dev
->host_features
)) {
320 virtio_bus_set_vdev_features(&dev
->bus
, features
.features
);
321 dev
->vdev
->guest_features
= features
.features
;
324 * If the guest supports more feature bits, assert that it
325 * passes us zeroes for those we don't support.
327 if (features
.features
) {
328 fprintf(stderr
, "Guest bug: features[%i]=%x (expected 0)\n",
329 features
.index
, features
.features
);
330 /* XXX: do a unit check here? */
333 sch
->curr_status
.scsw
.count
= ccw
.count
- sizeof(features
);
337 case CCW_CMD_READ_CONF
:
339 if (ccw
.count
> dev
->vdev
->config_len
) {
344 len
= MIN(ccw
.count
, dev
->vdev
->config_len
);
348 virtio_bus_get_vdev_config(&dev
->bus
, dev
->vdev
->config
);
349 /* XXX config space endianness */
350 cpu_physical_memory_write(ccw
.cda
, dev
->vdev
->config
, len
);
351 sch
->curr_status
.scsw
.count
= ccw
.count
- len
;
355 case CCW_CMD_WRITE_CONF
:
357 if (ccw
.count
> dev
->vdev
->config_len
) {
362 len
= MIN(ccw
.count
, dev
->vdev
->config_len
);
367 config
= cpu_physical_memory_map(ccw
.cda
, &hw_len
, 0);
372 /* XXX config space endianness */
373 memcpy(dev
->vdev
->config
, config
, len
);
374 cpu_physical_memory_unmap(config
, hw_len
, 0, hw_len
);
375 virtio_bus_set_vdev_config(&dev
->bus
, dev
->vdev
->config
);
376 sch
->curr_status
.scsw
.count
= ccw
.count
- len
;
381 case CCW_CMD_WRITE_STATUS
:
383 if (ccw
.count
!= sizeof(status
)) {
387 } else if (ccw
.count
< sizeof(status
)) {
388 /* Can't execute command. */
395 status
= ldub_phys(ccw
.cda
);
396 if (!(status
& VIRTIO_CONFIG_S_DRIVER_OK
)) {
397 virtio_ccw_stop_ioeventfd(dev
);
399 virtio_set_status(dev
->vdev
, status
);
400 if (dev
->vdev
->status
== 0) {
401 virtio_reset(dev
->vdev
);
403 if (status
& VIRTIO_CONFIG_S_DRIVER_OK
) {
404 virtio_ccw_start_ioeventfd(dev
);
406 sch
->curr_status
.scsw
.count
= ccw
.count
- sizeof(status
);
410 case CCW_CMD_SET_IND
:
412 if (ccw
.count
!= sizeof(indicators
)) {
416 } else if (ccw
.count
< sizeof(indicators
)) {
417 /* Can't execute command. */
424 indicators
= ldq_phys(ccw
.cda
);
425 dev
->indicators
= indicators
;
426 sch
->curr_status
.scsw
.count
= ccw
.count
- sizeof(indicators
);
430 case CCW_CMD_SET_CONF_IND
:
432 if (ccw
.count
!= sizeof(indicators
)) {
436 } else if (ccw
.count
< sizeof(indicators
)) {
437 /* Can't execute command. */
444 indicators
= ldq_phys(ccw
.cda
);
445 dev
->indicators2
= indicators
;
446 sch
->curr_status
.scsw
.count
= ccw
.count
- sizeof(indicators
);
450 case CCW_CMD_READ_VQ_CONF
:
452 if (ccw
.count
!= sizeof(vq_config
)) {
456 } else if (ccw
.count
< sizeof(vq_config
)) {
457 /* Can't execute command. */
464 vq_config
.index
= lduw_phys(ccw
.cda
);
465 vq_config
.num_max
= virtio_queue_get_num(dev
->vdev
,
467 stw_phys(ccw
.cda
+ sizeof(vq_config
.index
), vq_config
.num_max
);
468 sch
->curr_status
.scsw
.count
= ccw
.count
- sizeof(vq_config
);
479 static int virtio_ccw_device_init(VirtioCcwDevice
*dev
, VirtIODevice
*vdev
)
481 unsigned int cssid
= 0;
482 unsigned int ssid
= 0;
485 bool have_devno
= false;
490 DeviceState
*parent
= DEVICE(dev
);
492 sch
= g_malloc0(sizeof(SubchDev
));
494 sch
->driver_data
= dev
;
500 /* Initialize subchannel structure. */
501 sch
->channel_prog
= 0x0;
502 sch
->last_cmd_valid
= false;
505 * Use a device number if provided. Otherwise, fall back to subchannel
509 num
= sscanf(dev
->bus_id
, "%x.%x.%04x", &cssid
, &ssid
, &devno
);
511 if ((cssid
> MAX_CSSID
) || (ssid
> MAX_SSID
)) {
513 error_report("Invalid cssid or ssid: cssid %x, ssid %x",
517 /* Enforce use of virtual cssid. */
518 if (cssid
!= VIRTUAL_CSSID
) {
520 error_report("cssid %x not valid for virtio devices", cssid
);
523 if (css_devno_used(cssid
, ssid
, devno
)) {
525 error_report("Device %x.%x.%04x already exists", cssid
, ssid
,
535 error_report("Malformed devno parameter '%s'", dev
->bus_id
);
540 /* Find the next free id. */
542 for (schid
= 0; schid
<= MAX_SCHID
; schid
++) {
543 if (!css_find_subch(1, cssid
, ssid
, schid
)) {
545 css_subch_assign(cssid
, ssid
, schid
, devno
, sch
);
552 error_report("No free subchannel found for %x.%x.%04x", cssid
, ssid
,
556 trace_virtio_ccw_new_device(cssid
, ssid
, schid
, devno
,
559 cssid
= VIRTUAL_CSSID
;
560 for (ssid
= 0; ssid
<= MAX_SSID
; ssid
++) {
561 for (schid
= 0; schid
<= MAX_SCHID
; schid
++) {
562 if (!css_find_subch(1, cssid
, ssid
, schid
)) {
568 * If the devno is already taken, look further in this
571 while (css_devno_used(cssid
, ssid
, devno
)) {
572 if (devno
== MAX_SCHID
) {
574 } else if (devno
== schid
- 1) {
576 error_report("No free devno found");
583 css_subch_assign(cssid
, ssid
, schid
, devno
, sch
);
594 error_report("Virtual channel subsystem is full!");
597 trace_virtio_ccw_new_device(cssid
, ssid
, schid
, devno
,
601 /* Build initial schib. */
602 css_sch_build_virtual_schib(sch
, 0, VIRTIO_CCW_CHPID_TYPE
);
604 sch
->ccw_cb
= virtio_ccw_cb
;
606 /* Build senseid data. */
607 memset(&sch
->id
, 0, sizeof(SenseId
));
608 sch
->id
.reserved
= 0xff;
609 sch
->id
.cu_type
= VIRTIO_CCW_CU_TYPE
;
610 sch
->id
.cu_model
= dev
->vdev
->device_id
;
612 /* Only the first 32 feature bits are used. */
613 dev
->host_features
[0] = virtio_bus_get_vdev_features(&dev
->bus
,
614 dev
->host_features
[0]);
616 dev
->host_features
[0] |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY
;
617 dev
->host_features
[0] |= 0x1 << VIRTIO_F_BAD_FEATURE
;
619 css_generate_sch_crws(sch
->cssid
, sch
->ssid
, sch
->schid
,
620 parent
->hotplugged
, 1);
629 static int virtio_ccw_exit(VirtioCcwDevice
*dev
)
631 SubchDev
*sch
= dev
->sch
;
633 virtio_ccw_stop_ioeventfd(dev
);
635 css_subch_assign(sch
->cssid
, sch
->ssid
, sch
->schid
, sch
->devno
, NULL
);
642 static int virtio_ccw_net_init(VirtioCcwDevice
*ccw_dev
)
644 DeviceState
*qdev
= DEVICE(ccw_dev
);
645 VirtIONetCcw
*dev
= VIRTIO_NET_CCW(ccw_dev
);
646 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
648 virtio_net_set_config_size(&dev
->vdev
, ccw_dev
->host_features
[0]);
649 virtio_net_set_netclient_name(&dev
->vdev
, qdev
->id
,
650 object_get_typename(OBJECT(qdev
)));
651 qdev_set_parent_bus(vdev
, BUS(&ccw_dev
->bus
));
652 if (qdev_init(vdev
) < 0) {
656 return virtio_ccw_device_init(ccw_dev
, VIRTIO_DEVICE(vdev
));
659 static void virtio_ccw_net_instance_init(Object
*obj
)
661 VirtIONetCcw
*dev
= VIRTIO_NET_CCW(obj
);
662 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_NET
);
663 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
666 static int virtio_ccw_blk_init(VirtioCcwDevice
*ccw_dev
)
668 VirtIOBlkCcw
*dev
= VIRTIO_BLK_CCW(ccw_dev
);
669 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
670 virtio_blk_set_conf(vdev
, &(dev
->blk
));
671 qdev_set_parent_bus(vdev
, BUS(&ccw_dev
->bus
));
672 if (qdev_init(vdev
) < 0) {
676 return virtio_ccw_device_init(ccw_dev
, VIRTIO_DEVICE(vdev
));
679 static void virtio_ccw_blk_instance_init(Object
*obj
)
681 VirtIOBlkCcw
*dev
= VIRTIO_BLK_CCW(obj
);
682 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_BLK
);
683 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
686 static int virtio_ccw_serial_init(VirtioCcwDevice
*ccw_dev
)
688 VirtioSerialCcw
*dev
= VIRTIO_SERIAL_CCW(ccw_dev
);
689 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
690 DeviceState
*proxy
= DEVICE(ccw_dev
);
694 * For command line compatibility, this sets the virtio-serial-device bus
698 bus_name
= g_strdup_printf("%s.0", proxy
->id
);
699 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev
), bus_name
);
703 qdev_set_parent_bus(vdev
, BUS(&ccw_dev
->bus
));
704 if (qdev_init(vdev
) < 0) {
708 return virtio_ccw_device_init(ccw_dev
, VIRTIO_DEVICE(vdev
));
712 static void virtio_ccw_serial_instance_init(Object
*obj
)
714 VirtioSerialCcw
*dev
= VIRTIO_SERIAL_CCW(obj
);
715 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_SERIAL
);
716 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
719 static int virtio_ccw_balloon_init(VirtioCcwDevice
*ccw_dev
)
721 VirtIOBalloonCcw
*dev
= VIRTIO_BALLOON_CCW(ccw_dev
);
722 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
724 qdev_set_parent_bus(vdev
, BUS(&ccw_dev
->bus
));
725 if (qdev_init(vdev
) < 0) {
729 return virtio_ccw_device_init(ccw_dev
, VIRTIO_DEVICE(vdev
));
732 static void balloon_ccw_stats_get_all(Object
*obj
, struct Visitor
*v
,
733 void *opaque
, const char *name
,
736 VirtIOBalloonCcw
*dev
= opaque
;
737 object_property_get(OBJECT(&dev
->vdev
), v
, "guest-stats", errp
);
740 static void balloon_ccw_stats_get_poll_interval(Object
*obj
, struct Visitor
*v
,
741 void *opaque
, const char *name
,
744 VirtIOBalloonCcw
*dev
= opaque
;
745 object_property_get(OBJECT(&dev
->vdev
), v
, "guest-stats-polling-interval",
749 static void balloon_ccw_stats_set_poll_interval(Object
*obj
, struct Visitor
*v
,
750 void *opaque
, const char *name
,
753 VirtIOBalloonCcw
*dev
= opaque
;
754 object_property_set(OBJECT(&dev
->vdev
), v
, "guest-stats-polling-interval",
758 static void virtio_ccw_balloon_instance_init(Object
*obj
)
760 VirtIOBalloonCcw
*dev
= VIRTIO_BALLOON_CCW(obj
);
761 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_BALLOON
);
762 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
764 object_property_add(obj
, "guest-stats", "guest statistics",
765 balloon_ccw_stats_get_all
, NULL
, NULL
, dev
, NULL
);
767 object_property_add(obj
, "guest-stats-polling-interval", "int",
768 balloon_ccw_stats_get_poll_interval
,
769 balloon_ccw_stats_set_poll_interval
,
773 static int virtio_ccw_scsi_init(VirtioCcwDevice
*ccw_dev
)
775 VirtIOSCSICcw
*dev
= VIRTIO_SCSI_CCW(ccw_dev
);
776 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
777 DeviceState
*qdev
= DEVICE(ccw_dev
);
781 * For command line compatibility, this sets the virtio-scsi-device bus
785 bus_name
= g_strdup_printf("%s.0", qdev
->id
);
786 virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev
), bus_name
);
790 qdev_set_parent_bus(vdev
, BUS(&ccw_dev
->bus
));
791 if (qdev_init(vdev
) < 0) {
795 return virtio_ccw_device_init(ccw_dev
, VIRTIO_DEVICE(vdev
));
798 static void virtio_ccw_scsi_instance_init(Object
*obj
)
800 VirtIOSCSICcw
*dev
= VIRTIO_SCSI_CCW(obj
);
801 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_SCSI
);
802 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
805 #ifdef CONFIG_VHOST_SCSI
806 static int vhost_ccw_scsi_init(VirtioCcwDevice
*ccw_dev
)
808 VHostSCSICcw
*dev
= VHOST_SCSI_CCW(ccw_dev
);
809 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
811 qdev_set_parent_bus(vdev
, BUS(&ccw_dev
->bus
));
812 if (qdev_init(vdev
) < 0) {
816 return virtio_ccw_device_init(ccw_dev
, VIRTIO_DEVICE(vdev
));
819 static void vhost_ccw_scsi_instance_init(Object
*obj
)
821 VHostSCSICcw
*dev
= VHOST_SCSI_CCW(obj
);
822 object_initialize(OBJECT(&dev
->vdev
), TYPE_VHOST_SCSI
);
823 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
827 static int virtio_ccw_rng_init(VirtioCcwDevice
*ccw_dev
)
829 VirtIORNGCcw
*dev
= VIRTIO_RNG_CCW(ccw_dev
);
830 DeviceState
*vdev
= DEVICE(&dev
->vdev
);
832 qdev_set_parent_bus(vdev
, BUS(&ccw_dev
->bus
));
833 if (qdev_init(vdev
) < 0) {
837 object_property_set_link(OBJECT(dev
),
838 OBJECT(dev
->vdev
.conf
.rng
), "rng",
841 return virtio_ccw_device_init(ccw_dev
, VIRTIO_DEVICE(vdev
));
844 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
845 * be careful and test performance if you change this.
847 static inline VirtioCcwDevice
*to_virtio_ccw_dev_fast(DeviceState
*d
)
849 return container_of(d
, VirtioCcwDevice
, parent_obj
);
852 static void virtio_ccw_notify(DeviceState
*d
, uint16_t vector
)
854 VirtioCcwDevice
*dev
= to_virtio_ccw_dev_fast(d
);
855 SubchDev
*sch
= dev
->sch
;
862 if (vector
< VIRTIO_PCI_QUEUE_MAX
) {
863 if (!dev
->indicators
) {
866 indicators
= ldq_phys(dev
->indicators
);
867 indicators
|= 1ULL << vector
;
868 stq_phys(dev
->indicators
, indicators
);
870 if (!dev
->indicators2
) {
874 indicators
= ldq_phys(dev
->indicators2
);
875 indicators
|= 1ULL << vector
;
876 stq_phys(dev
->indicators2
, indicators
);
879 css_conditional_io_interrupt(sch
);
883 static unsigned virtio_ccw_get_features(DeviceState
*d
)
885 VirtioCcwDevice
*dev
= VIRTIO_CCW_DEVICE(d
);
887 /* Only the first 32 feature bits are used. */
888 return dev
->host_features
[0];
891 static void virtio_ccw_reset(DeviceState
*d
)
893 VirtioCcwDevice
*dev
= VIRTIO_CCW_DEVICE(d
);
895 virtio_ccw_stop_ioeventfd(dev
);
896 virtio_reset(dev
->vdev
);
897 css_reset_sch(dev
->sch
);
899 dev
->indicators2
= 0;
902 static void virtio_ccw_vmstate_change(DeviceState
*d
, bool running
)
904 VirtioCcwDevice
*dev
= VIRTIO_CCW_DEVICE(d
);
907 virtio_ccw_start_ioeventfd(dev
);
909 virtio_ccw_stop_ioeventfd(dev
);
913 static bool virtio_ccw_query_guest_notifiers(DeviceState
*d
)
915 VirtioCcwDevice
*dev
= VIRTIO_CCW_DEVICE(d
);
917 return !!(dev
->sch
->curr_status
.pmcw
.flags
& PMCW_FLAGS_MASK_ENA
);
920 static int virtio_ccw_set_host_notifier(DeviceState
*d
, int n
, bool assign
)
922 VirtioCcwDevice
*dev
= VIRTIO_CCW_DEVICE(d
);
924 /* Stop using the generic ioeventfd, we are doing eventfd handling
926 dev
->ioeventfd_disabled
= assign
;
928 virtio_ccw_stop_ioeventfd(dev
);
930 return virtio_ccw_set_guest2host_notifier(dev
, n
, assign
, false);
933 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice
*dev
, int n
,
934 bool assign
, bool with_irqfd
)
936 VirtQueue
*vq
= virtio_get_queue(dev
->vdev
, n
);
937 EventNotifier
*notifier
= virtio_queue_get_guest_notifier(vq
);
938 VirtioDeviceClass
*k
= VIRTIO_DEVICE_GET_CLASS(dev
->vdev
);
941 int r
= event_notifier_init(notifier
, 0);
946 virtio_queue_set_guest_notifier_fd_handler(vq
, true, with_irqfd
);
947 /* We do not support irqfd for classic I/O interrupts, because the
948 * classic interrupts are intermixed with the subchannel status, that
949 * is queried with test subchannel. We want to use vhost, though.
950 * Lets make sure to have vhost running and wire up the irq fd to
951 * land in qemu (and only the irq fd) in this code.
953 if (k
->guest_notifier_mask
) {
954 k
->guest_notifier_mask(dev
->vdev
, n
, false);
956 /* get lost events and re-inject */
957 if (k
->guest_notifier_pending
&&
958 k
->guest_notifier_pending(dev
->vdev
, n
)) {
959 event_notifier_set(notifier
);
962 if (k
->guest_notifier_mask
) {
963 k
->guest_notifier_mask(dev
->vdev
, n
, true);
965 virtio_queue_set_guest_notifier_fd_handler(vq
, false, with_irqfd
);
966 event_notifier_cleanup(notifier
);
971 static int virtio_ccw_set_guest_notifiers(DeviceState
*d
, int nvqs
,
974 VirtioCcwDevice
*dev
= VIRTIO_CCW_DEVICE(d
);
975 VirtIODevice
*vdev
= dev
->vdev
;
978 for (n
= 0; n
< nvqs
; n
++) {
979 if (!virtio_queue_get_num(vdev
, n
)) {
982 /* false -> true, as soon as irqfd works */
983 r
= virtio_ccw_set_guest_notifier(dev
, n
, assigned
, false);
992 virtio_ccw_set_guest_notifier(dev
, n
, !assigned
, false);
997 /**************** Virtio-ccw Bus Device Descriptions *******************/
999 static Property virtio_ccw_net_properties
[] = {
1000 DEFINE_PROP_STRING("devno", VirtioCcwDevice
, bus_id
),
1001 DEFINE_VIRTIO_NET_FEATURES(VirtioCcwDevice
, host_features
[0]),
1002 DEFINE_VIRTIO_NET_PROPERTIES(VirtIONetCcw
, vdev
.net_conf
),
1003 DEFINE_NIC_PROPERTIES(VirtIONetCcw
, vdev
.nic_conf
),
1004 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice
, flags
,
1005 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT
, true),
1006 DEFINE_PROP_END_OF_LIST(),
1009 static void virtio_ccw_net_class_init(ObjectClass
*klass
, void *data
)
1011 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1012 VirtIOCCWDeviceClass
*k
= VIRTIO_CCW_DEVICE_CLASS(klass
);
1014 k
->init
= virtio_ccw_net_init
;
1015 k
->exit
= virtio_ccw_exit
;
1016 dc
->reset
= virtio_ccw_reset
;
1017 dc
->props
= virtio_ccw_net_properties
;
1020 static const TypeInfo virtio_ccw_net
= {
1021 .name
= TYPE_VIRTIO_NET_CCW
,
1022 .parent
= TYPE_VIRTIO_CCW_DEVICE
,
1023 .instance_size
= sizeof(VirtIONetCcw
),
1024 .instance_init
= virtio_ccw_net_instance_init
,
1025 .class_init
= virtio_ccw_net_class_init
,
1028 static Property virtio_ccw_blk_properties
[] = {
1029 DEFINE_PROP_STRING("devno", VirtioCcwDevice
, bus_id
),
1030 DEFINE_VIRTIO_BLK_FEATURES(VirtioCcwDevice
, host_features
[0]),
1031 DEFINE_VIRTIO_BLK_PROPERTIES(VirtIOBlkCcw
, blk
),
1032 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice
, flags
,
1033 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT
, true),
1034 #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
1035 DEFINE_PROP_BIT("x-data-plane", VirtIOBlkCcw
, blk
.data_plane
, 0, false),
1037 DEFINE_PROP_END_OF_LIST(),
1040 static void virtio_ccw_blk_class_init(ObjectClass
*klass
, void *data
)
1042 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1043 VirtIOCCWDeviceClass
*k
= VIRTIO_CCW_DEVICE_CLASS(klass
);
1045 k
->init
= virtio_ccw_blk_init
;
1046 k
->exit
= virtio_ccw_exit
;
1047 dc
->reset
= virtio_ccw_reset
;
1048 dc
->props
= virtio_ccw_blk_properties
;
1051 static const TypeInfo virtio_ccw_blk
= {
1052 .name
= TYPE_VIRTIO_BLK_CCW
,
1053 .parent
= TYPE_VIRTIO_CCW_DEVICE
,
1054 .instance_size
= sizeof(VirtIOBlkCcw
),
1055 .instance_init
= virtio_ccw_blk_instance_init
,
1056 .class_init
= virtio_ccw_blk_class_init
,
1059 static Property virtio_ccw_serial_properties
[] = {
1060 DEFINE_PROP_STRING("devno", VirtioCcwDevice
, bus_id
),
1061 DEFINE_VIRTIO_SERIAL_PROPERTIES(VirtioSerialCcw
, vdev
.serial
),
1062 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice
, host_features
[0]),
1063 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice
, flags
,
1064 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT
, true),
1065 DEFINE_PROP_END_OF_LIST(),
1068 static void virtio_ccw_serial_class_init(ObjectClass
*klass
, void *data
)
1070 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1071 VirtIOCCWDeviceClass
*k
= VIRTIO_CCW_DEVICE_CLASS(klass
);
1073 k
->init
= virtio_ccw_serial_init
;
1074 k
->exit
= virtio_ccw_exit
;
1075 dc
->reset
= virtio_ccw_reset
;
1076 dc
->props
= virtio_ccw_serial_properties
;
1079 static const TypeInfo virtio_ccw_serial
= {
1080 .name
= TYPE_VIRTIO_SERIAL_CCW
,
1081 .parent
= TYPE_VIRTIO_CCW_DEVICE
,
1082 .instance_size
= sizeof(VirtioSerialCcw
),
1083 .instance_init
= virtio_ccw_serial_instance_init
,
1084 .class_init
= virtio_ccw_serial_class_init
,
1087 static Property virtio_ccw_balloon_properties
[] = {
1088 DEFINE_PROP_STRING("devno", VirtioCcwDevice
, bus_id
),
1089 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice
, host_features
[0]),
1090 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice
, flags
,
1091 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT
, true),
1092 DEFINE_PROP_END_OF_LIST(),
1095 static void virtio_ccw_balloon_class_init(ObjectClass
*klass
, void *data
)
1097 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1098 VirtIOCCWDeviceClass
*k
= VIRTIO_CCW_DEVICE_CLASS(klass
);
1100 k
->init
= virtio_ccw_balloon_init
;
1101 k
->exit
= virtio_ccw_exit
;
1102 dc
->reset
= virtio_ccw_reset
;
1103 dc
->props
= virtio_ccw_balloon_properties
;
1106 static const TypeInfo virtio_ccw_balloon
= {
1107 .name
= TYPE_VIRTIO_BALLOON_CCW
,
1108 .parent
= TYPE_VIRTIO_CCW_DEVICE
,
1109 .instance_size
= sizeof(VirtIOBalloonCcw
),
1110 .instance_init
= virtio_ccw_balloon_instance_init
,
1111 .class_init
= virtio_ccw_balloon_class_init
,
1114 static Property virtio_ccw_scsi_properties
[] = {
1115 DEFINE_PROP_STRING("devno", VirtioCcwDevice
, bus_id
),
1116 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOSCSICcw
, vdev
.parent_obj
.conf
),
1117 DEFINE_VIRTIO_SCSI_FEATURES(VirtioCcwDevice
, host_features
[0]),
1118 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice
, flags
,
1119 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT
, true),
1120 DEFINE_PROP_END_OF_LIST(),
1123 static void virtio_ccw_scsi_class_init(ObjectClass
*klass
, void *data
)
1125 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1126 VirtIOCCWDeviceClass
*k
= VIRTIO_CCW_DEVICE_CLASS(klass
);
1128 k
->init
= virtio_ccw_scsi_init
;
1129 k
->exit
= virtio_ccw_exit
;
1130 dc
->reset
= virtio_ccw_reset
;
1131 dc
->props
= virtio_ccw_scsi_properties
;
1134 static const TypeInfo virtio_ccw_scsi
= {
1135 .name
= TYPE_VIRTIO_SCSI_CCW
,
1136 .parent
= TYPE_VIRTIO_CCW_DEVICE
,
1137 .instance_size
= sizeof(VirtIOSCSICcw
),
1138 .instance_init
= virtio_ccw_scsi_instance_init
,
1139 .class_init
= virtio_ccw_scsi_class_init
,
1142 #ifdef CONFIG_VHOST_SCSI
1143 static Property vhost_ccw_scsi_properties
[] = {
1144 DEFINE_PROP_STRING("devno", VirtioCcwDevice
, bus_id
),
1145 DEFINE_VHOST_SCSI_PROPERTIES(VirtIOSCSICcw
, vdev
.parent_obj
.conf
),
1146 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice
, host_features
[0]),
1147 DEFINE_PROP_END_OF_LIST(),
1150 static void vhost_ccw_scsi_class_init(ObjectClass
*klass
, void *data
)
1152 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1153 VirtIOCCWDeviceClass
*k
= VIRTIO_CCW_DEVICE_CLASS(klass
);
1155 k
->init
= vhost_ccw_scsi_init
;
1156 k
->exit
= virtio_ccw_exit
;
1157 dc
->reset
= virtio_ccw_reset
;
1158 dc
->props
= vhost_ccw_scsi_properties
;
1161 static const TypeInfo vhost_ccw_scsi
= {
1162 .name
= TYPE_VHOST_SCSI_CCW
,
1163 .parent
= TYPE_VIRTIO_CCW_DEVICE
,
1164 .instance_size
= sizeof(VirtIOSCSICcw
),
1165 .instance_init
= vhost_ccw_scsi_instance_init
,
1166 .class_init
= vhost_ccw_scsi_class_init
,
1170 static void virtio_ccw_rng_instance_init(Object
*obj
)
1172 VirtIORNGCcw
*dev
= VIRTIO_RNG_CCW(obj
);
1173 object_initialize(OBJECT(&dev
->vdev
), TYPE_VIRTIO_RNG
);
1174 object_property_add_child(obj
, "virtio-backend", OBJECT(&dev
->vdev
), NULL
);
1175 object_property_add_link(obj
, "rng", TYPE_RNG_BACKEND
,
1176 (Object
**)&dev
->vdev
.conf
.rng
, NULL
);
1179 static Property virtio_ccw_rng_properties
[] = {
1180 DEFINE_PROP_STRING("devno", VirtioCcwDevice
, bus_id
),
1181 DEFINE_VIRTIO_COMMON_FEATURES(VirtioCcwDevice
, host_features
[0]),
1182 DEFINE_VIRTIO_RNG_PROPERTIES(VirtIORNGCcw
, vdev
.conf
),
1183 DEFINE_PROP_BIT("ioeventfd", VirtioCcwDevice
, flags
,
1184 VIRTIO_CCW_FLAG_USE_IOEVENTFD_BIT
, true),
1185 DEFINE_PROP_END_OF_LIST(),
1188 static void virtio_ccw_rng_class_init(ObjectClass
*klass
, void *data
)
1190 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1191 VirtIOCCWDeviceClass
*k
= VIRTIO_CCW_DEVICE_CLASS(klass
);
1193 k
->init
= virtio_ccw_rng_init
;
1194 k
->exit
= virtio_ccw_exit
;
1195 dc
->reset
= virtio_ccw_reset
;
1196 dc
->props
= virtio_ccw_rng_properties
;
1199 static const TypeInfo virtio_ccw_rng
= {
1200 .name
= TYPE_VIRTIO_RNG_CCW
,
1201 .parent
= TYPE_VIRTIO_CCW_DEVICE
,
1202 .instance_size
= sizeof(VirtIORNGCcw
),
1203 .instance_init
= virtio_ccw_rng_instance_init
,
1204 .class_init
= virtio_ccw_rng_class_init
,
1207 static int virtio_ccw_busdev_init(DeviceState
*dev
)
1209 VirtioCcwDevice
*_dev
= (VirtioCcwDevice
*)dev
;
1210 VirtIOCCWDeviceClass
*_info
= VIRTIO_CCW_DEVICE_GET_CLASS(dev
);
1212 virtio_ccw_bus_new(&_dev
->bus
, _dev
);
1214 return _info
->init(_dev
);
1217 static int virtio_ccw_busdev_exit(DeviceState
*dev
)
1219 VirtioCcwDevice
*_dev
= (VirtioCcwDevice
*)dev
;
1220 VirtIOCCWDeviceClass
*_info
= VIRTIO_CCW_DEVICE_GET_CLASS(dev
);
1222 return _info
->exit(_dev
);
1225 static int virtio_ccw_busdev_unplug(DeviceState
*dev
)
1227 VirtioCcwDevice
*_dev
= (VirtioCcwDevice
*)dev
;
1228 SubchDev
*sch
= _dev
->sch
;
1231 * We should arrive here only for device_del, since we don't support
1232 * direct hot(un)plug of channels, but only through virtio.
1234 assert(sch
!= NULL
);
1235 /* Subchannel is now disabled and no longer valid. */
1236 sch
->curr_status
.pmcw
.flags
&= ~(PMCW_FLAGS_MASK_ENA
|
1237 PMCW_FLAGS_MASK_DNV
);
1239 css_generate_sch_crws(sch
->cssid
, sch
->ssid
, sch
->schid
, 1, 0);
1245 static void virtio_ccw_device_class_init(ObjectClass
*klass
, void *data
)
1247 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1249 dc
->init
= virtio_ccw_busdev_init
;
1250 dc
->exit
= virtio_ccw_busdev_exit
;
1251 dc
->unplug
= virtio_ccw_busdev_unplug
;
1252 dc
->bus_type
= TYPE_VIRTUAL_CSS_BUS
;
1256 static const TypeInfo virtio_ccw_device_info
= {
1257 .name
= TYPE_VIRTIO_CCW_DEVICE
,
1258 .parent
= TYPE_DEVICE
,
1259 .instance_size
= sizeof(VirtioCcwDevice
),
1260 .class_init
= virtio_ccw_device_class_init
,
1261 .class_size
= sizeof(VirtIOCCWDeviceClass
),
1265 /***************** Virtual-css Bus Bridge Device ********************/
1266 /* Only required to have the virtio bus as child in the system bus */
1268 static int virtual_css_bridge_init(SysBusDevice
*dev
)
1274 static void virtual_css_bridge_class_init(ObjectClass
*klass
, void *data
)
1276 DeviceClass
*dc
= DEVICE_CLASS(klass
);
1277 SysBusDeviceClass
*k
= SYS_BUS_DEVICE_CLASS(klass
);
1279 k
->init
= virtual_css_bridge_init
;
1283 static const TypeInfo virtual_css_bridge_info
= {
1284 .name
= "virtual-css-bridge",
1285 .parent
= TYPE_SYS_BUS_DEVICE
,
1286 .instance_size
= sizeof(SysBusDevice
),
1287 .class_init
= virtual_css_bridge_class_init
,
1290 /* virtio-ccw-bus */
1292 static void virtio_ccw_bus_new(VirtioBusState
*bus
, VirtioCcwDevice
*dev
)
1294 DeviceState
*qdev
= DEVICE(dev
);
1296 char virtio_bus_name
[] = "virtio-bus";
1298 qbus_create_inplace((BusState
*)bus
, TYPE_VIRTIO_CCW_BUS
, qdev
,
1301 qbus
->allow_hotplug
= 1;
1304 static void virtio_ccw_bus_class_init(ObjectClass
*klass
, void *data
)
1306 VirtioBusClass
*k
= VIRTIO_BUS_CLASS(klass
);
1307 BusClass
*bus_class
= BUS_CLASS(klass
);
1309 bus_class
->max_dev
= 1;
1310 k
->notify
= virtio_ccw_notify
;
1311 k
->get_features
= virtio_ccw_get_features
;
1312 k
->vmstate_change
= virtio_ccw_vmstate_change
;
1313 k
->query_guest_notifiers
= virtio_ccw_query_guest_notifiers
;
1314 k
->set_host_notifier
= virtio_ccw_set_host_notifier
;
1315 k
->set_guest_notifiers
= virtio_ccw_set_guest_notifiers
;
1318 static const TypeInfo virtio_ccw_bus_info
= {
1319 .name
= TYPE_VIRTIO_CCW_BUS
,
1320 .parent
= TYPE_VIRTIO_BUS
,
1321 .instance_size
= sizeof(VirtioCcwBusState
),
1322 .class_init
= virtio_ccw_bus_class_init
,
1325 static void virtio_ccw_register(void)
1327 type_register_static(&virtio_ccw_bus_info
);
1328 type_register_static(&virtual_css_bus_info
);
1329 type_register_static(&virtio_ccw_device_info
);
1330 type_register_static(&virtio_ccw_serial
);
1331 type_register_static(&virtio_ccw_blk
);
1332 type_register_static(&virtio_ccw_net
);
1333 type_register_static(&virtio_ccw_balloon
);
1334 type_register_static(&virtio_ccw_scsi
);
1335 #ifdef CONFIG_VHOST_SCSI
1336 type_register_static(&vhost_ccw_scsi
);
1338 type_register_static(&virtio_ccw_rng
);
1339 type_register_static(&virtual_css_bridge_info
);
1342 type_init(virtio_ccw_register
)