2 * virtio ccw target implementation
4 * Copyright 2012,2015 IBM Corp.
8 * This work is licensed under the terms of the GNU GPL, version 2 or (at
9 * your option) any later version. See the COPYING file in the top-level
13 #include "qemu/osdep.h"
14 #include "qapi/error.h"
16 #include "sysemu/sysemu.h"
17 #include "sysemu/kvm.h"
19 #include "hw/virtio/virtio.h"
20 #include "hw/virtio/virtio-net.h"
21 #include "hw/sysbus.h"
22 #include "qemu/bitops.h"
23 #include "qemu/error-report.h"
24 #include "hw/virtio/virtio-access.h"
25 #include "hw/virtio/virtio-bus.h"
26 #include "hw/s390x/adapter.h"
27 #include "hw/s390x/s390_flic.h"
29 #include "hw/s390x/ioinst.h"
30 #include "hw/s390x/css.h"
31 #include "virtio-ccw.h"
33 #include "hw/s390x/css-bridge.h"
34 #include "hw/s390x/s390-virtio-ccw.h"
36 #define NR_CLASSIC_INDICATOR_BITS 64
38 static int virtio_ccw_dev_post_load(void *opaque, int version_id)
40 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(opaque);
41 CcwDevice *ccw_dev = CCW_DEVICE(dev);
42 CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
44 ccw_dev->sch->driver_data = dev;
45 if (ccw_dev->sch->thinint_active) {
46 dev->routes.adapter.adapter_id = css_get_adapter_id(
47 CSS_IO_ADAPTER_VIRTIO,
50 /* Re-fill subch_id after loading the subchannel states.*/
52 ck->refill_ids(ccw_dev);
57 typedef struct VirtioCcwDeviceTmp {
58 VirtioCcwDevice *parent;
59 uint16_t config_vector;
62 static int virtio_ccw_dev_tmp_pre_save(void *opaque)
64 VirtioCcwDeviceTmp *tmp = opaque;
65 VirtioCcwDevice *dev = tmp->parent;
66 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
68 tmp->config_vector = vdev->config_vector;
73 static int virtio_ccw_dev_tmp_post_load(void *opaque, int version_id)
75 VirtioCcwDeviceTmp *tmp = opaque;
76 VirtioCcwDevice *dev = tmp->parent;
77 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
79 vdev->config_vector = tmp->config_vector;
83 const VMStateDescription vmstate_virtio_ccw_dev_tmp = {
84 .name = "s390_virtio_ccw_dev_tmp",
85 .pre_save = virtio_ccw_dev_tmp_pre_save,
86 .post_load = virtio_ccw_dev_tmp_post_load,
87 .fields = (VMStateField[]) {
88 VMSTATE_UINT16(config_vector, VirtioCcwDeviceTmp),
93 const VMStateDescription vmstate_virtio_ccw_dev = {
94 .name = "s390_virtio_ccw_dev",
96 .minimum_version_id = 1,
97 .post_load = virtio_ccw_dev_post_load,
98 .fields = (VMStateField[]) {
99 VMSTATE_CCW_DEVICE(parent_obj, VirtioCcwDevice),
100 VMSTATE_PTR_TO_IND_ADDR(indicators, VirtioCcwDevice),
101 VMSTATE_PTR_TO_IND_ADDR(indicators2, VirtioCcwDevice),
102 VMSTATE_PTR_TO_IND_ADDR(summary_indicator, VirtioCcwDevice),
104 * Ugly hack because VirtIODevice does not migrate itself.
105 * This also makes legacy via vmstate_save_state possible.
107 VMSTATE_WITH_TMP(VirtioCcwDevice, VirtioCcwDeviceTmp,
108 vmstate_virtio_ccw_dev_tmp),
109 VMSTATE_STRUCT(routes, VirtioCcwDevice, 1, vmstate_adapter_routes,
111 VMSTATE_UINT8(thinint_isc, VirtioCcwDevice),
112 VMSTATE_INT32(revision, VirtioCcwDevice),
113 VMSTATE_END_OF_LIST()
117 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
118 VirtioCcwDevice *dev);
120 VirtIODevice *virtio_ccw_get_vdev(SubchDev *sch)
122 VirtIODevice *vdev = NULL;
123 VirtioCcwDevice *dev = sch->driver_data;
126 vdev = virtio_bus_get_device(&dev->bus);
131 static void virtio_ccw_start_ioeventfd(VirtioCcwDevice *dev)
133 virtio_bus_start_ioeventfd(&dev->bus);
136 static void virtio_ccw_stop_ioeventfd(VirtioCcwDevice *dev)
138 virtio_bus_stop_ioeventfd(&dev->bus);
141 static bool virtio_ccw_ioeventfd_enabled(DeviceState *d)
143 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
145 return (dev->flags & VIRTIO_CCW_FLAG_USE_IOEVENTFD) != 0;
148 static int virtio_ccw_ioeventfd_assign(DeviceState *d, EventNotifier *notifier,
151 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
152 CcwDevice *ccw_dev = CCW_DEVICE(dev);
153 SubchDev *sch = ccw_dev->sch;
154 uint32_t sch_id = (css_build_subchannel_id(sch) << 16) | sch->schid;
156 return s390_assign_subch_ioeventfd(notifier, sch_id, n, assign);
159 /* Communication blocks used by several channel commands. */
160 typedef struct VqInfoBlockLegacy {
165 } QEMU_PACKED VqInfoBlockLegacy;
167 typedef struct VqInfoBlock {
174 } QEMU_PACKED VqInfoBlock;
176 typedef struct VqConfigBlock {
179 } QEMU_PACKED VqConfigBlock;
181 typedef struct VirtioFeatDesc {
184 } QEMU_PACKED VirtioFeatDesc;
186 typedef struct VirtioThinintInfo {
187 hwaddr summary_indicator;
188 hwaddr device_indicator;
191 } QEMU_PACKED VirtioThinintInfo;
193 typedef struct VirtioRevInfo {
197 } QEMU_PACKED VirtioRevInfo;
199 /* Specify where the virtqueues for the subchannel are in guest memory. */
200 static int virtio_ccw_set_vqs(SubchDev *sch, VqInfoBlock *info,
201 VqInfoBlockLegacy *linfo)
203 VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
204 uint16_t index = info ? info->index : linfo->index;
205 uint16_t num = info ? info->num : linfo->num;
206 uint64_t desc = info ? info->desc : linfo->queue;
208 if (index >= VIRTIO_QUEUE_MAX) {
212 /* Current code in virtio.c relies on 4K alignment. */
213 if (linfo && desc && (linfo->align != 4096)) {
222 virtio_queue_set_rings(vdev, index, desc, info->avail, info->used);
224 virtio_queue_set_addr(vdev, index, desc);
227 virtio_queue_set_vector(vdev, index, VIRTIO_NO_VECTOR);
230 /* virtio-1 allows changing the ring size. */
231 if (virtio_queue_get_max_num(vdev, index) < num) {
232 /* Fail if we exceed the maximum number. */
235 virtio_queue_set_num(vdev, index, num);
236 } else if (virtio_queue_get_num(vdev, index) > num) {
237 /* Fail if we don't have a big enough queue. */
240 /* We ignore possible increased num for legacy for compatibility. */
241 virtio_queue_set_vector(vdev, index, index);
243 /* tell notify handler in case of config change */
244 vdev->config_vector = VIRTIO_QUEUE_MAX;
248 static void virtio_ccw_reset_virtio(VirtioCcwDevice *dev, VirtIODevice *vdev)
250 CcwDevice *ccw_dev = CCW_DEVICE(dev);
252 virtio_ccw_stop_ioeventfd(dev);
254 if (dev->indicators) {
255 release_indicator(&dev->routes.adapter, dev->indicators);
256 dev->indicators = NULL;
258 if (dev->indicators2) {
259 release_indicator(&dev->routes.adapter, dev->indicators2);
260 dev->indicators2 = NULL;
262 if (dev->summary_indicator) {
263 release_indicator(&dev->routes.adapter, dev->summary_indicator);
264 dev->summary_indicator = NULL;
266 ccw_dev->sch->thinint_active = false;
269 static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len,
274 VqInfoBlockLegacy linfo;
275 size_t info_len = is_legacy ? sizeof(linfo) : sizeof(info);
278 if (ccw.count != info_len) {
281 } else if (ccw.count < info_len) {
282 /* Can't execute command. */
289 ccw_dstream_read(&sch->cds, linfo);
290 linfo.queue = be64_to_cpu(linfo.queue);
291 linfo.align = be32_to_cpu(linfo.align);
292 linfo.index = be16_to_cpu(linfo.index);
293 linfo.num = be16_to_cpu(linfo.num);
294 ret = virtio_ccw_set_vqs(sch, NULL, &linfo);
296 ccw_dstream_read(&sch->cds, info);
297 info.desc = be64_to_cpu(info.desc);
298 info.index = be16_to_cpu(info.index);
299 info.num = be16_to_cpu(info.num);
300 info.avail = be64_to_cpu(info.avail);
301 info.used = be64_to_cpu(info.used);
302 ret = virtio_ccw_set_vqs(sch, &info, NULL);
304 sch->curr_status.scsw.count = 0;
308 static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
311 VirtioRevInfo revinfo;
313 VirtioFeatDesc features;
315 VqConfigBlock vq_config;
316 VirtioCcwDevice *dev = sch->driver_data;
317 VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
320 VirtioThinintInfo thinint;
326 trace_virtio_ccw_interpret_ccw(sch->cssid, sch->ssid, sch->schid,
328 check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC));
330 if (dev->force_revision_1 && dev->revision < 0 &&
331 ccw.cmd_code != CCW_CMD_SET_VIRTIO_REV) {
333 * virtio-1 drivers must start with negotiating to a revision >= 1,
334 * so post a command reject for all other commands
339 /* Look at the command. */
340 switch (ccw.cmd_code) {
342 ret = virtio_ccw_handle_set_vq(sch, ccw, check_len, dev->revision < 1);
344 case CCW_CMD_VDEV_RESET:
345 virtio_ccw_reset_virtio(dev, vdev);
348 case CCW_CMD_READ_FEAT:
350 if (ccw.count != sizeof(features)) {
354 } else if (ccw.count < sizeof(features)) {
355 /* Can't execute command. */
362 VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
364 ccw_dstream_advance(&sch->cds, sizeof(features.features));
365 ccw_dstream_read(&sch->cds, features.index);
366 if (features.index == 0) {
367 if (dev->revision >= 1) {
368 /* Don't offer legacy features for modern devices. */
369 features.features = (uint32_t)
370 (vdev->host_features & ~vdc->legacy_features);
372 features.features = (uint32_t)vdev->host_features;
374 } else if ((features.index == 1) && (dev->revision >= 1)) {
376 * Only offer feature bits beyond 31 if the guest has
377 * negotiated at least revision 1.
379 features.features = (uint32_t)(vdev->host_features >> 32);
381 /* Return zeroes if the guest supports more feature bits. */
382 features.features = 0;
384 ccw_dstream_rewind(&sch->cds);
385 features.features = cpu_to_le32(features.features);
386 ccw_dstream_write(&sch->cds, features.features);
387 sch->curr_status.scsw.count = ccw.count - sizeof(features);
391 case CCW_CMD_WRITE_FEAT:
393 if (ccw.count != sizeof(features)) {
397 } else if (ccw.count < sizeof(features)) {
398 /* Can't execute command. */
405 ccw_dstream_read(&sch->cds, features);
406 features.features = le32_to_cpu(features.features);
407 if (features.index == 0) {
408 virtio_set_features(vdev,
409 (vdev->guest_features & 0xffffffff00000000ULL) |
411 } else if ((features.index == 1) && (dev->revision >= 1)) {
413 * If the guest did not negotiate at least revision 1,
414 * we did not offer it any feature bits beyond 31. Such a
415 * guest passing us any bit here is therefore buggy.
417 virtio_set_features(vdev,
418 (vdev->guest_features & 0x00000000ffffffffULL) |
419 ((uint64_t)features.features << 32));
422 * If the guest supports more feature bits, assert that it
423 * passes us zeroes for those we don't support.
425 if (features.features) {
426 qemu_log_mask(LOG_GUEST_ERROR,
427 "Guest bug: features[%i]=%x (expected 0)",
428 features.index, features.features);
429 /* XXX: do a unit check here? */
432 sch->curr_status.scsw.count = ccw.count - sizeof(features);
436 case CCW_CMD_READ_CONF:
438 if (ccw.count > vdev->config_len) {
443 len = MIN(ccw.count, vdev->config_len);
447 virtio_bus_get_vdev_config(&dev->bus, vdev->config);
448 ccw_dstream_write_buf(&sch->cds, vdev->config, len);
449 sch->curr_status.scsw.count = ccw.count - len;
453 case CCW_CMD_WRITE_CONF:
455 if (ccw.count > vdev->config_len) {
460 len = MIN(ccw.count, vdev->config_len);
464 ret = ccw_dstream_read_buf(&sch->cds, vdev->config, len);
466 virtio_bus_set_vdev_config(&dev->bus, vdev->config);
467 sch->curr_status.scsw.count = ccw.count - len;
471 case CCW_CMD_READ_STATUS:
473 if (ccw.count != sizeof(status)) {
477 } else if (ccw.count < sizeof(status)) {
478 /* Can't execute command. */
485 address_space_stb(&address_space_memory, ccw.cda, vdev->status,
486 MEMTXATTRS_UNSPECIFIED, NULL);
487 sch->curr_status.scsw.count = ccw.count - sizeof(vdev->status);
491 case CCW_CMD_WRITE_STATUS:
493 if (ccw.count != sizeof(status)) {
497 } else if (ccw.count < sizeof(status)) {
498 /* Can't execute command. */
505 ccw_dstream_read(&sch->cds, status);
506 if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
507 virtio_ccw_stop_ioeventfd(dev);
509 if (virtio_set_status(vdev, status) == 0) {
510 if (vdev->status == 0) {
511 virtio_ccw_reset_virtio(dev, vdev);
513 if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
514 virtio_ccw_start_ioeventfd(dev);
516 sch->curr_status.scsw.count = ccw.count - sizeof(status);
519 /* Trigger a command reject. */
524 case CCW_CMD_SET_IND:
526 if (ccw.count != sizeof(indicators)) {
530 } else if (ccw.count < sizeof(indicators)) {
531 /* Can't execute command. */
535 if (sch->thinint_active) {
536 /* Trigger a command reject. */
540 if (virtio_get_num_queues(vdev) > NR_CLASSIC_INDICATOR_BITS) {
541 /* More queues than indicator bits --> trigger a reject */
548 ccw_dstream_read(&sch->cds, indicators);
549 indicators = be64_to_cpu(indicators);
550 dev->indicators = get_indicator(indicators, sizeof(uint64_t));
551 sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
555 case CCW_CMD_SET_CONF_IND:
557 if (ccw.count != sizeof(indicators)) {
561 } else if (ccw.count < sizeof(indicators)) {
562 /* Can't execute command. */
569 ccw_dstream_read(&sch->cds, indicators);
570 indicators = be64_to_cpu(indicators);
571 dev->indicators2 = get_indicator(indicators, sizeof(uint64_t));
572 sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
576 case CCW_CMD_READ_VQ_CONF:
578 if (ccw.count != sizeof(vq_config)) {
582 } else if (ccw.count < sizeof(vq_config)) {
583 /* Can't execute command. */
590 ccw_dstream_read(&sch->cds, vq_config.index);
591 vq_config.index = be16_to_cpu(vq_config.index);
592 if (vq_config.index >= VIRTIO_QUEUE_MAX) {
596 vq_config.num_max = virtio_queue_get_num(vdev,
598 vq_config.num_max = cpu_to_be16(vq_config.num_max);
599 ccw_dstream_write(&sch->cds, vq_config.num_max);
600 sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
604 case CCW_CMD_SET_IND_ADAPTER:
606 if (ccw.count != sizeof(thinint)) {
610 } else if (ccw.count < sizeof(thinint)) {
611 /* Can't execute command. */
617 } else if (dev->indicators && !sch->thinint_active) {
618 /* Trigger a command reject. */
621 if (ccw_dstream_read(&sch->cds, thinint)) {
624 thinint.ind_bit = be64_to_cpu(thinint.ind_bit);
625 thinint.summary_indicator =
626 be64_to_cpu(thinint.summary_indicator);
627 thinint.device_indicator =
628 be64_to_cpu(thinint.device_indicator);
630 dev->summary_indicator =
631 get_indicator(thinint.summary_indicator, sizeof(uint8_t));
633 get_indicator(thinint.device_indicator,
634 thinint.ind_bit / 8 + 1);
635 dev->thinint_isc = thinint.isc;
636 dev->routes.adapter.ind_offset = thinint.ind_bit;
637 dev->routes.adapter.summary_offset = 7;
638 dev->routes.adapter.adapter_id = css_get_adapter_id(
639 CSS_IO_ADAPTER_VIRTIO,
641 sch->thinint_active = ((dev->indicators != NULL) &&
642 (dev->summary_indicator != NULL));
643 sch->curr_status.scsw.count = ccw.count - sizeof(thinint);
648 case CCW_CMD_SET_VIRTIO_REV:
649 len = sizeof(revinfo);
650 if (ccw.count < len) {
658 ccw_dstream_read_buf(&sch->cds, &revinfo, 4);
659 revinfo.revision = be16_to_cpu(revinfo.revision);
660 revinfo.length = be16_to_cpu(revinfo.length);
661 if (ccw.count < len + revinfo.length ||
662 (check_len && ccw.count > len + revinfo.length)) {
667 * Once we start to support revisions with additional data, we'll
668 * need to fetch it here. Nothing to do for now, though.
670 if (dev->revision >= 0 ||
671 revinfo.revision > virtio_ccw_rev_max(dev) ||
672 (dev->force_revision_1 && !revinfo.revision)) {
677 dev->revision = revinfo.revision;
686 static void virtio_sch_disable_cb(SubchDev *sch)
688 VirtioCcwDevice *dev = sch->driver_data;
693 static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp)
695 VirtIOCCWDeviceClass *k = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
696 CcwDevice *ccw_dev = CCW_DEVICE(dev);
697 CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
701 sch = css_create_sch(ccw_dev->devno, errp);
705 if (!virtio_ccw_rev_max(dev) && dev->force_revision_1) {
706 error_setg(&err, "Invalid value of property max_rev "
707 "(is %d expected >= 1)", virtio_ccw_rev_max(dev));
711 sch->driver_data = dev;
712 sch->ccw_cb = virtio_ccw_cb;
713 sch->disable_cb = virtio_sch_disable_cb;
714 sch->id.reserved = 0xff;
715 sch->id.cu_type = VIRTIO_CCW_CU_TYPE;
716 sch->do_subchannel_work = do_subchannel_work_virtual;
718 dev->indicators = NULL;
720 css_sch_build_virtual_schib(sch, 0, VIRTIO_CCW_CHPID_TYPE);
722 trace_virtio_ccw_new_device(
723 sch->cssid, sch->ssid, sch->schid, sch->devno,
724 ccw_dev->devno.valid ? "user-configured" : "auto-configured");
726 if (kvm_enabled() && !kvm_eventfds_enabled()) {
727 dev->flags &= ~VIRTIO_CCW_FLAG_USE_IOEVENTFD;
731 k->realize(dev, &err);
737 ck->realize(ccw_dev, &err);
745 error_propagate(errp, err);
746 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
751 static void virtio_ccw_device_unrealize(VirtioCcwDevice *dev, Error **errp)
753 VirtIOCCWDeviceClass *dc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
754 CcwDevice *ccw_dev = CCW_DEVICE(dev);
755 SubchDev *sch = ccw_dev->sch;
758 dc->unrealize(dev, errp);
762 css_subch_assign(sch->cssid, sch->ssid, sch->schid, sch->devno, NULL);
766 if (dev->indicators) {
767 release_indicator(&dev->routes.adapter, dev->indicators);
768 dev->indicators = NULL;
772 /* DeviceState to VirtioCcwDevice. Note: used on datapath,
773 * be careful and test performance if you change this.
775 static inline VirtioCcwDevice *to_virtio_ccw_dev_fast(DeviceState *d)
777 CcwDevice *ccw_dev = to_ccw_dev_fast(d);
779 return container_of(ccw_dev, VirtioCcwDevice, parent_obj);
782 static uint8_t virtio_set_ind_atomic(SubchDev *sch, uint64_t ind_loc,
785 uint8_t ind_old, ind_new;
789 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
791 error_report("%s(%x.%x.%04x): unable to access indicator",
792 __func__, sch->cssid, sch->ssid, sch->schid);
797 ind_new = ind_old | to_be_set;
798 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
799 trace_virtio_ccw_set_ind(ind_loc, ind_old, ind_new);
800 cpu_physical_memory_unmap(ind_addr, len, 1, len);
805 static void virtio_ccw_notify(DeviceState *d, uint16_t vector)
807 VirtioCcwDevice *dev = to_virtio_ccw_dev_fast(d);
808 CcwDevice *ccw_dev = to_ccw_dev_fast(d);
809 SubchDev *sch = ccw_dev->sch;
812 if (vector == VIRTIO_NO_VECTOR) {
816 * vector < VIRTIO_QUEUE_MAX: notification for a virtqueue
817 * vector == VIRTIO_QUEUE_MAX: configuration change notification
818 * bits beyond that are unused and should never be notified for
820 assert(vector <= VIRTIO_QUEUE_MAX);
822 if (vector < VIRTIO_QUEUE_MAX) {
823 if (!dev->indicators) {
826 if (sch->thinint_active) {
828 * In the adapter interrupt case, indicators points to a
829 * memory area that may be (way) larger than 64 bit and
830 * ind_bit indicates the start of the indicators in a big
833 uint64_t ind_bit = dev->routes.adapter.ind_offset;
835 virtio_set_ind_atomic(sch, dev->indicators->addr +
836 (ind_bit + vector) / 8,
837 0x80 >> ((ind_bit + vector) % 8));
838 if (!virtio_set_ind_atomic(sch, dev->summary_indicator->addr,
840 css_adapter_interrupt(CSS_IO_ADAPTER_VIRTIO, dev->thinint_isc);
843 assert(vector < NR_CLASSIC_INDICATOR_BITS);
844 indicators = address_space_ldq(&address_space_memory,
845 dev->indicators->addr,
846 MEMTXATTRS_UNSPECIFIED,
848 indicators |= 1ULL << vector;
849 address_space_stq(&address_space_memory, dev->indicators->addr,
850 indicators, MEMTXATTRS_UNSPECIFIED, NULL);
851 css_conditional_io_interrupt(sch);
854 if (!dev->indicators2) {
857 indicators = address_space_ldq(&address_space_memory,
858 dev->indicators2->addr,
859 MEMTXATTRS_UNSPECIFIED,
862 address_space_stq(&address_space_memory, dev->indicators2->addr,
863 indicators, MEMTXATTRS_UNSPECIFIED, NULL);
864 css_conditional_io_interrupt(sch);
868 static void virtio_ccw_reset(DeviceState *d)
870 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
871 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
872 VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_GET_CLASS(dev);
874 virtio_ccw_reset_virtio(dev, vdev);
875 if (vdc->parent_reset) {
876 vdc->parent_reset(d);
880 static void virtio_ccw_vmstate_change(DeviceState *d, bool running)
882 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
885 virtio_ccw_start_ioeventfd(dev);
887 virtio_ccw_stop_ioeventfd(dev);
891 static bool virtio_ccw_query_guest_notifiers(DeviceState *d)
893 CcwDevice *dev = CCW_DEVICE(d);
895 return !!(dev->sch->curr_status.pmcw.flags & PMCW_FLAGS_MASK_ENA);
898 static int virtio_ccw_get_mappings(VirtioCcwDevice *dev)
901 CcwDevice *ccw_dev = CCW_DEVICE(dev);
903 if (!ccw_dev->sch->thinint_active) {
907 r = map_indicator(&dev->routes.adapter, dev->summary_indicator);
911 r = map_indicator(&dev->routes.adapter, dev->indicators);
915 dev->routes.adapter.summary_addr = dev->summary_indicator->map;
916 dev->routes.adapter.ind_addr = dev->indicators->map;
921 static int virtio_ccw_setup_irqroutes(VirtioCcwDevice *dev, int nvqs)
924 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
926 S390FLICState *fs = s390_get_flic();
927 S390FLICStateClass *fsc = s390_get_flic_class(fs);
929 ret = virtio_ccw_get_mappings(dev);
933 for (i = 0; i < nvqs; i++) {
934 if (!virtio_queue_get_num(vdev, i)) {
938 dev->routes.num_routes = i;
939 return fsc->add_adapter_routes(fs, &dev->routes);
942 static void virtio_ccw_release_irqroutes(VirtioCcwDevice *dev, int nvqs)
944 S390FLICState *fs = s390_get_flic();
945 S390FLICStateClass *fsc = s390_get_flic_class(fs);
947 fsc->release_adapter_routes(fs, &dev->routes);
950 static int virtio_ccw_add_irqfd(VirtioCcwDevice *dev, int n)
952 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
953 VirtQueue *vq = virtio_get_queue(vdev, n);
954 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
956 return kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, notifier, NULL,
960 static void virtio_ccw_remove_irqfd(VirtioCcwDevice *dev, int n)
962 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
963 VirtQueue *vq = virtio_get_queue(vdev, n);
964 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
967 ret = kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, notifier,
972 static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
973 bool assign, bool with_irqfd)
975 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
976 VirtQueue *vq = virtio_get_queue(vdev, n);
977 EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
978 VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
981 int r = event_notifier_init(notifier, 0);
986 virtio_queue_set_guest_notifier_fd_handler(vq, true, with_irqfd);
988 r = virtio_ccw_add_irqfd(dev, n);
990 virtio_queue_set_guest_notifier_fd_handler(vq, false,
996 * We do not support individual masking for channel devices, so we
997 * need to manually trigger any guest masking callbacks here.
999 if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
1000 k->guest_notifier_mask(vdev, n, false);
1002 /* get lost events and re-inject */
1003 if (k->guest_notifier_pending &&
1004 k->guest_notifier_pending(vdev, n)) {
1005 event_notifier_set(notifier);
1008 if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
1009 k->guest_notifier_mask(vdev, n, true);
1012 virtio_ccw_remove_irqfd(dev, n);
1014 virtio_queue_set_guest_notifier_fd_handler(vq, false, with_irqfd);
1015 event_notifier_cleanup(notifier);
1020 static int virtio_ccw_set_guest_notifiers(DeviceState *d, int nvqs,
1023 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1024 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1025 CcwDevice *ccw_dev = CCW_DEVICE(d);
1026 bool with_irqfd = ccw_dev->sch->thinint_active && kvm_irqfds_enabled();
1029 if (with_irqfd && assigned) {
1030 /* irq routes need to be set up before assigning irqfds */
1031 r = virtio_ccw_setup_irqroutes(dev, nvqs);
1033 goto irqroute_error;
1036 for (n = 0; n < nvqs; n++) {
1037 if (!virtio_queue_get_num(vdev, n)) {
1040 r = virtio_ccw_set_guest_notifier(dev, n, assigned, with_irqfd);
1045 if (with_irqfd && !assigned) {
1046 /* release irq routes after irqfds have been released */
1047 virtio_ccw_release_irqroutes(dev, nvqs);
1053 virtio_ccw_set_guest_notifier(dev, n, !assigned, false);
1056 if (with_irqfd && assigned) {
1057 virtio_ccw_release_irqroutes(dev, nvqs);
1062 static void virtio_ccw_save_queue(DeviceState *d, int n, QEMUFile *f)
1064 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1065 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1067 qemu_put_be16(f, virtio_queue_vector(vdev, n));
1070 static int virtio_ccw_load_queue(DeviceState *d, int n, QEMUFile *f)
1072 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1073 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1076 qemu_get_be16s(f, &vector);
1077 virtio_queue_set_vector(vdev, n , vector);
1082 static void virtio_ccw_save_config(DeviceState *d, QEMUFile *f)
1084 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1085 vmstate_save_state(f, &vmstate_virtio_ccw_dev, dev, NULL);
1088 static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
1090 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1091 return vmstate_load_state(f, &vmstate_virtio_ccw_dev, dev, 1);
1094 static void virtio_ccw_pre_plugged(DeviceState *d, Error **errp)
1096 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1097 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1099 if (dev->max_rev >= 1) {
1100 virtio_add_feature(&vdev->host_features, VIRTIO_F_VERSION_1);
1104 /* This is called by virtio-bus just after the device is plugged. */
1105 static void virtio_ccw_device_plugged(DeviceState *d, Error **errp)
1107 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1108 VirtIODevice *vdev = virtio_bus_get_device(&dev->bus);
1109 CcwDevice *ccw_dev = CCW_DEVICE(d);
1110 SubchDev *sch = ccw_dev->sch;
1111 int n = virtio_get_num_queues(vdev);
1112 S390FLICState *flic = s390_get_flic();
1114 if (!virtio_has_feature(vdev->host_features, VIRTIO_F_VERSION_1)) {
1118 if (virtio_get_num_queues(vdev) > VIRTIO_QUEUE_MAX) {
1119 error_setg(errp, "The number of virtqueues %d "
1120 "exceeds virtio limit %d", n,
1124 if (virtio_get_num_queues(vdev) > flic->adapter_routes_max_batch) {
1125 error_setg(errp, "The number of virtqueues %d "
1126 "exceeds flic adapter route limit %d", n,
1127 flic->adapter_routes_max_batch);
1131 sch->id.cu_model = virtio_bus_get_vdev_id(&dev->bus);
1134 css_generate_sch_crws(sch->cssid, sch->ssid, sch->schid,
1138 static void virtio_ccw_device_unplugged(DeviceState *d)
1140 VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
1142 virtio_ccw_stop_ioeventfd(dev);
1144 /**************** Virtio-ccw Bus Device Descriptions *******************/
1146 static void virtio_ccw_busdev_realize(DeviceState *dev, Error **errp)
1148 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1150 virtio_ccw_bus_new(&_dev->bus, sizeof(_dev->bus), _dev);
1151 virtio_ccw_device_realize(_dev, errp);
1154 static void virtio_ccw_busdev_unrealize(DeviceState *dev, Error **errp)
1156 VirtioCcwDevice *_dev = (VirtioCcwDevice *)dev;
1158 virtio_ccw_device_unrealize(_dev, errp);
1161 static void virtio_ccw_busdev_unplug(HotplugHandler *hotplug_dev,
1162 DeviceState *dev, Error **errp)
1164 VirtioCcwDevice *_dev = to_virtio_ccw_dev_fast(dev);
1166 virtio_ccw_stop_ioeventfd(_dev);
1169 static void virtio_ccw_device_class_init(ObjectClass *klass, void *data)
1171 DeviceClass *dc = DEVICE_CLASS(klass);
1172 CCWDeviceClass *k = CCW_DEVICE_CLASS(dc);
1173 VirtIOCCWDeviceClass *vdc = VIRTIO_CCW_DEVICE_CLASS(klass);
1175 k->unplug = virtio_ccw_busdev_unplug;
1176 dc->realize = virtio_ccw_busdev_realize;
1177 dc->unrealize = virtio_ccw_busdev_unrealize;
1178 dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
1179 device_class_set_parent_reset(dc, virtio_ccw_reset, &vdc->parent_reset);
1182 static const TypeInfo virtio_ccw_device_info = {
1183 .name = TYPE_VIRTIO_CCW_DEVICE,
1184 .parent = TYPE_CCW_DEVICE,
1185 .instance_size = sizeof(VirtioCcwDevice),
1186 .class_init = virtio_ccw_device_class_init,
1187 .class_size = sizeof(VirtIOCCWDeviceClass),
1191 /* virtio-ccw-bus */
1193 static void virtio_ccw_bus_new(VirtioBusState *bus, size_t bus_size,
1194 VirtioCcwDevice *dev)
1196 DeviceState *qdev = DEVICE(dev);
1197 char virtio_bus_name[] = "virtio-bus";
1199 qbus_create_inplace(bus, bus_size, TYPE_VIRTIO_CCW_BUS,
1200 qdev, virtio_bus_name);
1203 static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
1205 VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
1206 BusClass *bus_class = BUS_CLASS(klass);
1208 bus_class->max_dev = 1;
1209 k->notify = virtio_ccw_notify;
1210 k->vmstate_change = virtio_ccw_vmstate_change;
1211 k->query_guest_notifiers = virtio_ccw_query_guest_notifiers;
1212 k->set_guest_notifiers = virtio_ccw_set_guest_notifiers;
1213 k->save_queue = virtio_ccw_save_queue;
1214 k->load_queue = virtio_ccw_load_queue;
1215 k->save_config = virtio_ccw_save_config;
1216 k->load_config = virtio_ccw_load_config;
1217 k->pre_plugged = virtio_ccw_pre_plugged;
1218 k->device_plugged = virtio_ccw_device_plugged;
1219 k->device_unplugged = virtio_ccw_device_unplugged;
1220 k->ioeventfd_enabled = virtio_ccw_ioeventfd_enabled;
1221 k->ioeventfd_assign = virtio_ccw_ioeventfd_assign;
1224 static const TypeInfo virtio_ccw_bus_info = {
1225 .name = TYPE_VIRTIO_CCW_BUS,
1226 .parent = TYPE_VIRTIO_BUS,
1227 .instance_size = sizeof(VirtioCcwBusState),
1228 .class_init = virtio_ccw_bus_class_init,
1231 static void virtio_ccw_register(void)
1233 type_register_static(&virtio_ccw_bus_info);
1234 type_register_static(&virtio_ccw_device_info);
1237 type_init(virtio_ccw_register)