2 * QEMU S390 virtio target
4 * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 #include "block/block.h"
22 #include "sysemu/sysemu.h"
24 #include "monitor/monitor.h"
27 #include "hw/virtio.h"
28 #include "hw/virtio-rng.h"
29 #include "hw/virtio-serial.h"
30 #include "hw/virtio-net.h"
31 #include "hw/sysbus.h"
32 #include "sysemu/kvm.h"
34 #include "hw/s390-virtio-bus.h"
36 /* #define DEBUG_S390 */
39 #define dprintf(fmt, ...) \
40 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
42 #define dprintf(fmt, ...) \
46 #define VIRTIO_EXT_CODE 0x2603
48 static const TypeInfo s390_virtio_bus_info
= {
49 .name
= TYPE_S390_VIRTIO_BUS
,
51 .instance_size
= sizeof(VirtIOS390Bus
),
54 static const VirtIOBindings virtio_s390_bindings
;
56 static ram_addr_t
s390_virtio_device_num_vq(VirtIOS390Device
*dev
);
58 /* length of VirtIO device pages */
59 const hwaddr virtio_size
= S390_DEVICE_PAGES
* TARGET_PAGE_SIZE
;
61 static void s390_virtio_bus_reset(void *opaque
)
63 VirtIOS390Bus
*bus
= opaque
;
64 bus
->next_ring
= bus
->dev_page
+ TARGET_PAGE_SIZE
;
67 void s390_virtio_reset_idx(VirtIOS390Device
*dev
)
73 num_vq
= s390_virtio_device_num_vq(dev
);
74 for (i
= 0; i
< num_vq
; i
++) {
75 idx_addr
= virtio_queue_get_avail_addr(dev
->vdev
, i
) +
76 VIRTIO_VRING_AVAIL_IDX_OFFS
;
77 stw_phys(idx_addr
, 0);
78 idx_addr
= virtio_queue_get_used_addr(dev
->vdev
, i
) +
79 VIRTIO_VRING_USED_IDX_OFFS
;
80 stw_phys(idx_addr
, 0);
84 VirtIOS390Bus
*s390_virtio_bus_init(ram_addr_t
*ram_size
)
90 /* Create bridge device */
91 dev
= qdev_create(NULL
, "s390-virtio-bridge");
92 qdev_init_nofail(dev
);
94 /* Create bus on bridge device */
96 _bus
= qbus_create(TYPE_S390_VIRTIO_BUS
, dev
, "s390-virtio");
97 bus
= DO_UPCAST(VirtIOS390Bus
, bus
, _bus
);
99 bus
->dev_page
= *ram_size
;
100 bus
->dev_offs
= bus
->dev_page
;
101 bus
->next_ring
= bus
->dev_page
+ TARGET_PAGE_SIZE
;
103 /* Enable hotplugging */
104 _bus
->allow_hotplug
= 1;
106 /* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
107 *ram_size
+= S390_DEVICE_PAGES
* TARGET_PAGE_SIZE
;
109 qemu_register_reset(s390_virtio_bus_reset
, bus
);
113 static void s390_virtio_irq(CPUS390XState
*env
, int config_change
, uint64_t token
)
116 kvm_s390_virtio_irq(env
, config_change
, token
);
118 cpu_inject_ext(env
, VIRTIO_EXT_CODE
, config_change
, token
);
122 static int s390_virtio_device_init(VirtIOS390Device
*dev
, VirtIODevice
*vdev
)
127 bus
= DO_UPCAST(VirtIOS390Bus
, bus
, dev
->qdev
.parent_bus
);
129 dev
->dev_offs
= bus
->dev_offs
;
130 dev
->feat_len
= sizeof(uint32_t); /* always keep 32 bits features */
132 dev_len
= VIRTIO_DEV_OFFS_CONFIG
;
133 dev_len
+= s390_virtio_device_num_vq(dev
) * VIRTIO_VQCONFIG_LEN
;
134 dev_len
+= dev
->feat_len
* 2;
135 dev_len
+= vdev
->config_len
;
137 bus
->dev_offs
+= dev_len
;
139 virtio_bind_device(vdev
, &virtio_s390_bindings
, DEVICE(dev
));
140 dev
->host_features
= vdev
->get_features(vdev
, dev
->host_features
);
141 s390_virtio_device_sync(dev
);
142 s390_virtio_reset_idx(dev
);
143 if (dev
->qdev
.hotplugged
) {
144 S390CPU
*cpu
= s390_cpu_addr2state(0);
145 CPUS390XState
*env
= &cpu
->env
;
146 s390_virtio_irq(env
, VIRTIO_PARAM_DEV_ADD
, dev
->dev_offs
);
152 static int s390_virtio_net_init(VirtIOS390Device
*dev
)
156 vdev
= virtio_net_init((DeviceState
*)dev
, &dev
->nic
, &dev
->net
);
161 return s390_virtio_device_init(dev
, vdev
);
164 static int s390_virtio_blk_init(VirtIOS390Device
*dev
)
168 vdev
= virtio_blk_init((DeviceState
*)dev
, &dev
->blk
);
173 return s390_virtio_device_init(dev
, vdev
);
176 static int s390_virtio_serial_init(VirtIOS390Device
*dev
)
182 bus
= DO_UPCAST(VirtIOS390Bus
, bus
, dev
->qdev
.parent_bus
);
184 vdev
= virtio_serial_init((DeviceState
*)dev
, &dev
->serial
);
189 r
= s390_virtio_device_init(dev
, vdev
);
197 static int s390_virtio_scsi_init(VirtIOS390Device
*dev
)
201 vdev
= virtio_scsi_init((DeviceState
*)dev
, &dev
->scsi
);
206 return s390_virtio_device_init(dev
, vdev
);
209 static int s390_virtio_rng_init(VirtIOS390Device
*dev
)
213 vdev
= virtio_rng_init((DeviceState
*)dev
, &dev
->rng
);
218 return s390_virtio_device_init(dev
, vdev
);
221 static uint64_t s390_virtio_device_vq_token(VirtIOS390Device
*dev
, int vq
)
223 ram_addr_t token_off
;
225 token_off
= (dev
->dev_offs
+ VIRTIO_DEV_OFFS_CONFIG
) +
226 (vq
* VIRTIO_VQCONFIG_LEN
) +
227 VIRTIO_VQCONFIG_OFFS_TOKEN
;
229 return ldq_be_phys(token_off
);
232 static ram_addr_t
s390_virtio_device_num_vq(VirtIOS390Device
*dev
)
234 VirtIODevice
*vdev
= dev
->vdev
;
237 for (num_vq
= 0; num_vq
< VIRTIO_PCI_QUEUE_MAX
; num_vq
++) {
238 if (!virtio_queue_get_num(vdev
, num_vq
)) {
246 static ram_addr_t
s390_virtio_next_ring(VirtIOS390Bus
*bus
)
248 ram_addr_t r
= bus
->next_ring
;
250 bus
->next_ring
+= VIRTIO_RING_LEN
;
254 void s390_virtio_device_sync(VirtIOS390Device
*dev
)
256 VirtIOS390Bus
*bus
= DO_UPCAST(VirtIOS390Bus
, bus
, dev
->qdev
.parent_bus
);
261 virtio_reset(dev
->vdev
);
264 stb_phys(dev
->dev_offs
+ VIRTIO_DEV_OFFS_TYPE
, dev
->vdev
->device_id
);
266 stb_phys(dev
->dev_offs
+ VIRTIO_DEV_OFFS_NUM_VQ
, s390_virtio_device_num_vq(dev
));
267 stb_phys(dev
->dev_offs
+ VIRTIO_DEV_OFFS_FEATURE_LEN
, dev
->feat_len
);
269 stb_phys(dev
->dev_offs
+ VIRTIO_DEV_OFFS_CONFIG_LEN
, dev
->vdev
->config_len
);
271 num_vq
= s390_virtio_device_num_vq(dev
);
272 stb_phys(dev
->dev_offs
+ VIRTIO_DEV_OFFS_NUM_VQ
, num_vq
);
274 /* Sync virtqueues */
275 for (i
= 0; i
< num_vq
; i
++) {
276 ram_addr_t vq
= (dev
->dev_offs
+ VIRTIO_DEV_OFFS_CONFIG
) +
277 (i
* VIRTIO_VQCONFIG_LEN
);
280 vring
= s390_virtio_next_ring(bus
);
281 virtio_queue_set_addr(dev
->vdev
, i
, vring
);
282 virtio_queue_set_vector(dev
->vdev
, i
, i
);
283 stq_be_phys(vq
+ VIRTIO_VQCONFIG_OFFS_ADDRESS
, vring
);
284 stw_be_phys(vq
+ VIRTIO_VQCONFIG_OFFS_NUM
, virtio_queue_get_num(dev
->vdev
, i
));
287 cur_offs
= dev
->dev_offs
;
288 cur_offs
+= VIRTIO_DEV_OFFS_CONFIG
;
289 cur_offs
+= num_vq
* VIRTIO_VQCONFIG_LEN
;
291 /* Sync feature bitmap */
292 stl_le_phys(cur_offs
, dev
->host_features
);
294 dev
->feat_offs
= cur_offs
+ dev
->feat_len
;
295 cur_offs
+= dev
->feat_len
* 2;
297 /* Sync config space */
298 if (dev
->vdev
->get_config
) {
299 dev
->vdev
->get_config(dev
->vdev
, dev
->vdev
->config
);
302 cpu_physical_memory_write(cur_offs
,
303 dev
->vdev
->config
, dev
->vdev
->config_len
);
304 cur_offs
+= dev
->vdev
->config_len
;
307 void s390_virtio_device_update_status(VirtIOS390Device
*dev
)
309 VirtIODevice
*vdev
= dev
->vdev
;
312 virtio_set_status(vdev
, ldub_phys(dev
->dev_offs
+ VIRTIO_DEV_OFFS_STATUS
));
314 /* Update guest supported feature bitmap */
316 features
= bswap32(ldl_be_phys(dev
->feat_offs
));
317 virtio_set_features(vdev
, features
);
320 VirtIOS390Device
*s390_virtio_bus_console(VirtIOS390Bus
*bus
)
325 /* Find a device by vring address */
326 VirtIOS390Device
*s390_virtio_bus_find_vring(VirtIOS390Bus
*bus
,
333 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
334 VirtIOS390Device
*dev
= (VirtIOS390Device
*)kid
->child
;
336 for(i
= 0; i
< VIRTIO_PCI_QUEUE_MAX
; i
++) {
337 if (!virtio_queue_get_addr(dev
->vdev
, i
))
339 if (virtio_queue_get_addr(dev
->vdev
, i
) == mem
) {
351 /* Find a device by device descriptor location */
352 VirtIOS390Device
*s390_virtio_bus_find_mem(VirtIOS390Bus
*bus
, ram_addr_t mem
)
356 QTAILQ_FOREACH(kid
, &bus
->bus
.children
, sibling
) {
357 VirtIOS390Device
*dev
= (VirtIOS390Device
*)kid
->child
;
358 if (dev
->dev_offs
== mem
) {
366 /* DeviceState to VirtIOS390Device. Note: used on datapath,
367 * be careful and test performance if you change this.
369 static inline VirtIOS390Device
*to_virtio_s390_device_fast(DeviceState
*d
)
371 return container_of(d
, VirtIOS390Device
, qdev
);
374 /* DeviceState to VirtIOS390Device. TODO: use QOM. */
375 static inline VirtIOS390Device
*to_virtio_s390_device(DeviceState
*d
)
377 return container_of(d
, VirtIOS390Device
, qdev
);
380 static void virtio_s390_notify(DeviceState
*d
, uint16_t vector
)
382 VirtIOS390Device
*dev
= to_virtio_s390_device_fast(d
);
383 uint64_t token
= s390_virtio_device_vq_token(dev
, vector
);
384 S390CPU
*cpu
= s390_cpu_addr2state(0);
385 CPUS390XState
*env
= &cpu
->env
;
387 s390_virtio_irq(env
, 0, token
);
390 static unsigned virtio_s390_get_features(DeviceState
*d
)
392 VirtIOS390Device
*dev
= to_virtio_s390_device(d
);
393 return dev
->host_features
;
396 /**************** S390 Virtio Bus Device Descriptions *******************/
398 static const VirtIOBindings virtio_s390_bindings
= {
399 .notify
= virtio_s390_notify
,
400 .get_features
= virtio_s390_get_features
,
403 static Property s390_virtio_net_properties
[] = {
404 DEFINE_NIC_PROPERTIES(VirtIOS390Device
, nic
),
405 DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device
,
406 net
.txtimer
, TX_TIMER_INTERVAL
),
407 DEFINE_PROP_INT32("x-txburst", VirtIOS390Device
,
408 net
.txburst
, TX_BURST
),
409 DEFINE_PROP_STRING("tx", VirtIOS390Device
, net
.tx
),
410 DEFINE_PROP_END_OF_LIST(),
413 static void s390_virtio_net_class_init(ObjectClass
*klass
, void *data
)
415 DeviceClass
*dc
= DEVICE_CLASS(klass
);
416 VirtIOS390DeviceClass
*k
= VIRTIO_S390_DEVICE_CLASS(klass
);
418 k
->init
= s390_virtio_net_init
;
419 dc
->props
= s390_virtio_net_properties
;
422 static TypeInfo s390_virtio_net
= {
423 .name
= "virtio-net-s390",
424 .parent
= TYPE_VIRTIO_S390_DEVICE
,
425 .instance_size
= sizeof(VirtIOS390Device
),
426 .class_init
= s390_virtio_net_class_init
,
429 static Property s390_virtio_blk_properties
[] = {
430 DEFINE_BLOCK_PROPERTIES(VirtIOS390Device
, blk
.conf
),
431 DEFINE_BLOCK_CHS_PROPERTIES(VirtIOS390Device
, blk
.conf
),
432 DEFINE_PROP_STRING("serial", VirtIOS390Device
, blk
.serial
),
434 DEFINE_PROP_BIT("scsi", VirtIOS390Device
, blk
.scsi
, 0, true),
436 DEFINE_PROP_END_OF_LIST(),
439 static void s390_virtio_blk_class_init(ObjectClass
*klass
, void *data
)
441 DeviceClass
*dc
= DEVICE_CLASS(klass
);
442 VirtIOS390DeviceClass
*k
= VIRTIO_S390_DEVICE_CLASS(klass
);
444 k
->init
= s390_virtio_blk_init
;
445 dc
->props
= s390_virtio_blk_properties
;
448 static TypeInfo s390_virtio_blk
= {
449 .name
= "virtio-blk-s390",
450 .parent
= TYPE_VIRTIO_S390_DEVICE
,
451 .instance_size
= sizeof(VirtIOS390Device
),
452 .class_init
= s390_virtio_blk_class_init
,
455 static Property s390_virtio_serial_properties
[] = {
456 DEFINE_PROP_UINT32("max_ports", VirtIOS390Device
,
457 serial
.max_virtserial_ports
, 31),
458 DEFINE_PROP_END_OF_LIST(),
461 static void s390_virtio_serial_class_init(ObjectClass
*klass
, void *data
)
463 DeviceClass
*dc
= DEVICE_CLASS(klass
);
464 VirtIOS390DeviceClass
*k
= VIRTIO_S390_DEVICE_CLASS(klass
);
466 k
->init
= s390_virtio_serial_init
;
467 dc
->props
= s390_virtio_serial_properties
;
470 static TypeInfo s390_virtio_serial
= {
471 .name
= "virtio-serial-s390",
472 .parent
= TYPE_VIRTIO_S390_DEVICE
,
473 .instance_size
= sizeof(VirtIOS390Device
),
474 .class_init
= s390_virtio_serial_class_init
,
477 static void s390_virtio_rng_initfn(Object
*obj
)
479 VirtIOS390Device
*dev
= VIRTIO_S390_DEVICE(obj
);
481 object_property_add_link(obj
, "rng", TYPE_RNG_BACKEND
,
482 (Object
**)&dev
->rng
.rng
, NULL
);
485 static void s390_virtio_rng_class_init(ObjectClass
*klass
, void *data
)
487 VirtIOS390DeviceClass
*k
= VIRTIO_S390_DEVICE_CLASS(klass
);
489 k
->init
= s390_virtio_rng_init
;
492 static TypeInfo s390_virtio_rng
= {
493 .name
= "virtio-rng-s390",
494 .parent
= TYPE_VIRTIO_S390_DEVICE
,
495 .instance_size
= sizeof(VirtIOS390Device
),
496 .instance_init
= s390_virtio_rng_initfn
,
497 .class_init
= s390_virtio_rng_class_init
,
500 static int s390_virtio_busdev_init(DeviceState
*dev
)
502 VirtIOS390Device
*_dev
= (VirtIOS390Device
*)dev
;
503 VirtIOS390DeviceClass
*_info
= VIRTIO_S390_DEVICE_GET_CLASS(dev
);
505 return _info
->init(_dev
);
508 static void virtio_s390_device_class_init(ObjectClass
*klass
, void *data
)
510 DeviceClass
*dc
= DEVICE_CLASS(klass
);
512 dc
->init
= s390_virtio_busdev_init
;
513 dc
->bus_type
= TYPE_S390_VIRTIO_BUS
;
514 dc
->unplug
= qdev_simple_unplug_cb
;
517 static TypeInfo virtio_s390_device_info
= {
518 .name
= TYPE_VIRTIO_S390_DEVICE
,
519 .parent
= TYPE_DEVICE
,
520 .instance_size
= sizeof(VirtIOS390Device
),
521 .class_init
= virtio_s390_device_class_init
,
522 .class_size
= sizeof(VirtIOS390DeviceClass
),
526 static Property s390_virtio_scsi_properties
[] = {
527 DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOS390Device
, host_features
, scsi
),
528 DEFINE_PROP_END_OF_LIST(),
531 static void s390_virtio_scsi_class_init(ObjectClass
*klass
, void *data
)
533 DeviceClass
*dc
= DEVICE_CLASS(klass
);
534 VirtIOS390DeviceClass
*k
= VIRTIO_S390_DEVICE_CLASS(klass
);
536 k
->init
= s390_virtio_scsi_init
;
537 dc
->props
= s390_virtio_scsi_properties
;
540 static TypeInfo s390_virtio_scsi
= {
541 .name
= "virtio-scsi-s390",
542 .parent
= TYPE_VIRTIO_S390_DEVICE
,
543 .instance_size
= sizeof(VirtIOS390Device
),
544 .class_init
= s390_virtio_scsi_class_init
,
547 /***************** S390 Virtio Bus Bridge Device *******************/
548 /* Only required to have the virtio bus as child in the system bus */
550 static int s390_virtio_bridge_init(SysBusDevice
*dev
)
556 static void s390_virtio_bridge_class_init(ObjectClass
*klass
, void *data
)
558 DeviceClass
*dc
= DEVICE_CLASS(klass
);
559 SysBusDeviceClass
*k
= SYS_BUS_DEVICE_CLASS(klass
);
561 k
->init
= s390_virtio_bridge_init
;
565 static TypeInfo s390_virtio_bridge_info
= {
566 .name
= "s390-virtio-bridge",
567 .parent
= TYPE_SYS_BUS_DEVICE
,
568 .instance_size
= sizeof(SysBusDevice
),
569 .class_init
= s390_virtio_bridge_class_init
,
572 static void s390_virtio_register_types(void)
574 type_register_static(&s390_virtio_bus_info
);
575 type_register_static(&virtio_s390_device_info
);
576 type_register_static(&s390_virtio_serial
);
577 type_register_static(&s390_virtio_blk
);
578 type_register_static(&s390_virtio_net
);
579 type_register_static(&s390_virtio_scsi
);
580 type_register_static(&s390_virtio_rng
);
581 type_register_static(&s390_virtio_bridge_info
);
584 type_init(s390_virtio_register_types
)