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f3304eea AG |
1 | /* |
2 | * QEMU S390 virtio target | |
3 | * | |
4 | * Copyright (c) 2009 Alexander Graf <agraf@suse.de> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #include "hw.h" | |
21 | #include "block.h" | |
22 | #include "sysemu.h" | |
23 | #include "net.h" | |
24 | #include "boards.h" | |
25 | #include "monitor.h" | |
26 | #include "loader.h" | |
27 | #include "elf.h" | |
28 | #include "hw/virtio.h" | |
98b19252 | 29 | #include "hw/virtio-serial.h" |
f0c07c7c | 30 | #include "hw/virtio-net.h" |
f3304eea AG |
31 | #include "hw/sysbus.h" |
32 | #include "kvm.h" | |
33 | ||
34 | #include "hw/s390-virtio-bus.h" | |
35 | ||
36 | /* #define DEBUG_S390 */ | |
37 | ||
38 | #ifdef DEBUG_S390 | |
39 | #define dprintf(fmt, ...) \ | |
40 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
41 | #else | |
42 | #define dprintf(fmt, ...) \ | |
43 | do { } while (0) | |
44 | #endif | |
45 | ||
8103b4d1 AG |
46 | #define VIRTIO_EXT_CODE 0x2603 |
47 | ||
f3304eea AG |
48 | struct BusInfo s390_virtio_bus_info = { |
49 | .name = "s390-virtio", | |
50 | .size = sizeof(VirtIOS390Bus), | |
51 | }; | |
52 | ||
f3304eea AG |
53 | static const VirtIOBindings virtio_s390_bindings; |
54 | ||
55 | static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev); | |
f3304eea | 56 | |
d1ff903c AG |
57 | /* length of VirtIO device pages */ |
58 | const target_phys_addr_t virtio_size = S390_DEVICE_PAGES * TARGET_PAGE_SIZE; | |
59 | ||
f3304eea AG |
60 | VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size) |
61 | { | |
62 | VirtIOS390Bus *bus; | |
63 | BusState *_bus; | |
64 | DeviceState *dev; | |
65 | ||
66 | /* Create bridge device */ | |
67 | dev = qdev_create(NULL, "s390-virtio-bridge"); | |
68 | qdev_init_nofail(dev); | |
69 | ||
70 | /* Create bus on bridge device */ | |
71 | ||
72 | _bus = qbus_create(&s390_virtio_bus_info, dev, "s390-virtio"); | |
73 | bus = DO_UPCAST(VirtIOS390Bus, bus, _bus); | |
74 | ||
75 | bus->dev_page = *ram_size; | |
76 | bus->dev_offs = bus->dev_page; | |
77 | bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE; | |
78 | ||
7fa41e53 AG |
79 | /* Enable hotplugging */ |
80 | _bus->allow_hotplug = 1; | |
81 | ||
f3304eea AG |
82 | /* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */ |
83 | *ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE; | |
84 | ||
85 | return bus; | |
86 | } | |
87 | ||
7fa41e53 AG |
88 | static void s390_virtio_irq(CPUState *env, int config_change, uint64_t token) |
89 | { | |
90 | if (kvm_enabled()) { | |
91 | kvm_s390_virtio_irq(env, config_change, token); | |
92 | } else { | |
93 | cpu_inject_ext(env, VIRTIO_EXT_CODE, config_change, token); | |
94 | } | |
95 | } | |
96 | ||
f3304eea AG |
97 | static int s390_virtio_device_init(VirtIOS390Device *dev, VirtIODevice *vdev) |
98 | { | |
99 | VirtIOS390Bus *bus; | |
100 | int dev_len; | |
101 | ||
102 | bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); | |
103 | dev->vdev = vdev; | |
104 | dev->dev_offs = bus->dev_offs; | |
105 | dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */ | |
106 | ||
107 | dev_len = VIRTIO_DEV_OFFS_CONFIG; | |
108 | dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN; | |
109 | dev_len += dev->feat_len * 2; | |
110 | dev_len += vdev->config_len; | |
111 | ||
112 | bus->dev_offs += dev_len; | |
113 | ||
114 | virtio_bind_device(vdev, &virtio_s390_bindings, dev); | |
8172539d | 115 | dev->host_features = vdev->get_features(vdev, dev->host_features); |
f3304eea AG |
116 | s390_virtio_device_sync(dev); |
117 | ||
7fa41e53 AG |
118 | if (dev->qdev.hotplugged) { |
119 | CPUState *env = s390_cpu_addr2state(0); | |
120 | s390_virtio_irq(env, VIRTIO_PARAM_DEV_ADD, dev->dev_offs); | |
121 | } | |
122 | ||
f3304eea AG |
123 | return 0; |
124 | } | |
125 | ||
126 | static int s390_virtio_net_init(VirtIOS390Device *dev) | |
127 | { | |
128 | VirtIODevice *vdev; | |
129 | ||
f0c07c7c | 130 | vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net); |
f3304eea AG |
131 | if (!vdev) { |
132 | return -1; | |
133 | } | |
134 | ||
135 | return s390_virtio_device_init(dev, vdev); | |
136 | } | |
137 | ||
138 | static int s390_virtio_blk_init(VirtIOS390Device *dev) | |
139 | { | |
140 | VirtIODevice *vdev; | |
141 | ||
a8686a9b MA |
142 | vdev = virtio_blk_init((DeviceState *)dev, &dev->block, |
143 | &dev->block_serial); | |
f3304eea AG |
144 | if (!vdev) { |
145 | return -1; | |
146 | } | |
147 | ||
148 | return s390_virtio_device_init(dev, vdev); | |
149 | } | |
150 | ||
98b19252 | 151 | static int s390_virtio_serial_init(VirtIOS390Device *dev) |
f3304eea AG |
152 | { |
153 | VirtIOS390Bus *bus; | |
154 | VirtIODevice *vdev; | |
155 | int r; | |
156 | ||
157 | bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); | |
158 | ||
6be9b414 | 159 | vdev = virtio_serial_init((DeviceState *)dev, &dev->serial); |
f3304eea AG |
160 | if (!vdev) { |
161 | return -1; | |
162 | } | |
163 | ||
164 | r = s390_virtio_device_init(dev, vdev); | |
165 | if (!r) { | |
166 | bus->console = dev; | |
167 | } | |
168 | ||
169 | return r; | |
170 | } | |
171 | ||
172 | static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq) | |
173 | { | |
174 | ram_addr_t token_off; | |
175 | ||
176 | token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) + | |
177 | (vq * VIRTIO_VQCONFIG_LEN) + | |
178 | VIRTIO_VQCONFIG_OFFS_TOKEN; | |
179 | ||
04bc74ed | 180 | return ldq_be_phys(token_off); |
f3304eea AG |
181 | } |
182 | ||
183 | static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev) | |
184 | { | |
185 | VirtIODevice *vdev = dev->vdev; | |
186 | int num_vq; | |
187 | ||
188 | for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) { | |
189 | if (!virtio_queue_get_num(vdev, num_vq)) { | |
190 | break; | |
191 | } | |
192 | } | |
193 | ||
194 | return num_vq; | |
195 | } | |
196 | ||
197 | static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus) | |
198 | { | |
199 | ram_addr_t r = bus->next_ring; | |
200 | ||
201 | bus->next_ring += VIRTIO_RING_LEN; | |
202 | return r; | |
203 | } | |
204 | ||
baf0b55a | 205 | void s390_virtio_device_sync(VirtIOS390Device *dev) |
f3304eea AG |
206 | { |
207 | VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); | |
208 | ram_addr_t cur_offs; | |
209 | uint8_t num_vq; | |
210 | int i; | |
211 | ||
212 | virtio_reset(dev->vdev); | |
213 | ||
214 | /* Sync dev space */ | |
215 | stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id); | |
216 | ||
217 | stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev)); | |
218 | stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len); | |
219 | ||
220 | stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len); | |
221 | ||
222 | num_vq = s390_virtio_device_num_vq(dev); | |
223 | stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq); | |
224 | ||
225 | /* Sync virtqueues */ | |
226 | for (i = 0; i < num_vq; i++) { | |
227 | ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) + | |
228 | (i * VIRTIO_VQCONFIG_LEN); | |
229 | ram_addr_t vring; | |
230 | ||
231 | vring = s390_virtio_next_ring(bus); | |
232 | virtio_queue_set_addr(dev->vdev, i, vring); | |
233 | virtio_queue_set_vector(dev->vdev, i, i); | |
04bc74ed AG |
234 | stq_be_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring); |
235 | stw_be_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i)); | |
f3304eea AG |
236 | } |
237 | ||
238 | cur_offs = dev->dev_offs; | |
239 | cur_offs += VIRTIO_DEV_OFFS_CONFIG; | |
240 | cur_offs += num_vq * VIRTIO_VQCONFIG_LEN; | |
241 | ||
242 | /* Sync feature bitmap */ | |
04bc74ed | 243 | stl_le_phys(cur_offs, dev->host_features); |
f3304eea AG |
244 | |
245 | dev->feat_offs = cur_offs + dev->feat_len; | |
246 | cur_offs += dev->feat_len * 2; | |
247 | ||
248 | /* Sync config space */ | |
249 | if (dev->vdev->get_config) { | |
250 | dev->vdev->get_config(dev->vdev, dev->vdev->config); | |
251 | } | |
252 | ||
54f7b4a3 SW |
253 | cpu_physical_memory_write(cur_offs, |
254 | dev->vdev->config, dev->vdev->config_len); | |
f3304eea AG |
255 | cur_offs += dev->vdev->config_len; |
256 | } | |
257 | ||
258 | void s390_virtio_device_update_status(VirtIOS390Device *dev) | |
259 | { | |
260 | VirtIODevice *vdev = dev->vdev; | |
261 | uint32_t features; | |
262 | ||
3e607cb5 | 263 | virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS)); |
f3304eea AG |
264 | |
265 | /* Update guest supported feature bitmap */ | |
266 | ||
04bc74ed | 267 | features = bswap32(ldl_be_phys(dev->feat_offs)); |
ad0c9332 | 268 | virtio_set_features(vdev, features); |
f3304eea AG |
269 | } |
270 | ||
271 | VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus) | |
272 | { | |
273 | return bus->console; | |
274 | } | |
275 | ||
276 | /* Find a device by vring address */ | |
277 | VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus, | |
278 | ram_addr_t mem, | |
279 | int *vq_num) | |
280 | { | |
281 | VirtIOS390Device *_dev; | |
282 | DeviceState *dev; | |
283 | int i; | |
284 | ||
d8bb00d6 | 285 | QTAILQ_FOREACH(dev, &bus->bus.children, sibling) { |
f3304eea AG |
286 | _dev = (VirtIOS390Device *)dev; |
287 | for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) { | |
288 | if (!virtio_queue_get_addr(_dev->vdev, i)) | |
289 | break; | |
290 | if (virtio_queue_get_addr(_dev->vdev, i) == mem) { | |
291 | if (vq_num) { | |
292 | *vq_num = i; | |
293 | } | |
294 | return _dev; | |
295 | } | |
296 | } | |
297 | } | |
298 | ||
299 | return NULL; | |
300 | } | |
301 | ||
302 | /* Find a device by device descriptor location */ | |
303 | VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem) | |
304 | { | |
305 | VirtIOS390Device *_dev; | |
306 | DeviceState *dev; | |
307 | ||
d8bb00d6 | 308 | QTAILQ_FOREACH(dev, &bus->bus.children, sibling) { |
f3304eea AG |
309 | _dev = (VirtIOS390Device *)dev; |
310 | if (_dev->dev_offs == mem) { | |
311 | return _dev; | |
312 | } | |
313 | } | |
314 | ||
315 | return NULL; | |
316 | } | |
317 | ||
318 | static void virtio_s390_notify(void *opaque, uint16_t vector) | |
319 | { | |
320 | VirtIOS390Device *dev = (VirtIOS390Device*)opaque; | |
321 | uint64_t token = s390_virtio_device_vq_token(dev, vector); | |
8103b4d1 | 322 | CPUState *env = s390_cpu_addr2state(0); |
f3304eea | 323 | |
7fa41e53 | 324 | s390_virtio_irq(env, 0, token); |
f3304eea AG |
325 | } |
326 | ||
8172539d MT |
327 | static unsigned virtio_s390_get_features(void *opaque) |
328 | { | |
329 | VirtIOS390Device *dev = (VirtIOS390Device*)opaque; | |
330 | return dev->host_features; | |
331 | } | |
332 | ||
f3304eea AG |
333 | /**************** S390 Virtio Bus Device Descriptions *******************/ |
334 | ||
335 | static const VirtIOBindings virtio_s390_bindings = { | |
336 | .notify = virtio_s390_notify, | |
8172539d | 337 | .get_features = virtio_s390_get_features, |
f3304eea AG |
338 | }; |
339 | ||
39bffca2 AL |
340 | static Property s390_virtio_net_properties[] = { |
341 | DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic), | |
342 | DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device, | |
343 | net.txtimer, TX_TIMER_INTERVAL), | |
344 | DEFINE_PROP_INT32("x-txburst", VirtIOS390Device, | |
345 | net.txburst, TX_BURST), | |
346 | DEFINE_PROP_STRING("tx", VirtIOS390Device, net.tx), | |
347 | DEFINE_PROP_END_OF_LIST(), | |
348 | }; | |
349 | ||
19b6914a AL |
350 | static void s390_virtio_net_class_init(ObjectClass *klass, void *data) |
351 | { | |
39bffca2 AL |
352 | DeviceClass *dc = DEVICE_CLASS(klass); |
353 | VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass); | |
19b6914a | 354 | |
39bffca2 AL |
355 | k->init = s390_virtio_net_init; |
356 | dc->props = s390_virtio_net_properties; | |
19b6914a AL |
357 | } |
358 | ||
39bffca2 AL |
359 | static TypeInfo s390_virtio_net = { |
360 | .name = "virtio-net-s390", | |
361 | .parent = TYPE_VIRTIO_S390_DEVICE, | |
362 | .instance_size = sizeof(VirtIOS390Device), | |
363 | .class_init = s390_virtio_net_class_init, | |
364 | }; | |
365 | ||
366 | static Property s390_virtio_blk_properties[] = { | |
367 | DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, block), | |
368 | DEFINE_PROP_STRING("serial", VirtIOS390Device, block_serial), | |
369 | DEFINE_PROP_END_OF_LIST(), | |
f3304eea AG |
370 | }; |
371 | ||
19b6914a AL |
372 | static void s390_virtio_blk_class_init(ObjectClass *klass, void *data) |
373 | { | |
39bffca2 AL |
374 | DeviceClass *dc = DEVICE_CLASS(klass); |
375 | VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass); | |
19b6914a | 376 | |
39bffca2 AL |
377 | k->init = s390_virtio_blk_init; |
378 | dc->props = s390_virtio_blk_properties; | |
19b6914a AL |
379 | } |
380 | ||
39bffca2 AL |
381 | static TypeInfo s390_virtio_blk = { |
382 | .name = "virtio-blk-s390", | |
383 | .parent = TYPE_VIRTIO_S390_DEVICE, | |
384 | .instance_size = sizeof(VirtIOS390Device), | |
385 | .class_init = s390_virtio_blk_class_init, | |
386 | }; | |
387 | ||
388 | static Property s390_virtio_serial_properties[] = { | |
389 | DEFINE_PROP_UINT32("max_ports", VirtIOS390Device, | |
390 | serial.max_virtserial_ports, 31), | |
391 | DEFINE_PROP_END_OF_LIST(), | |
f3304eea AG |
392 | }; |
393 | ||
19b6914a AL |
394 | static void s390_virtio_serial_class_init(ObjectClass *klass, void *data) |
395 | { | |
39bffca2 AL |
396 | DeviceClass *dc = DEVICE_CLASS(klass); |
397 | VirtIOS390DeviceClass *k = VIRTIO_S390_DEVICE_CLASS(klass); | |
19b6914a | 398 | |
39bffca2 AL |
399 | k->init = s390_virtio_serial_init; |
400 | dc->props = s390_virtio_serial_properties; | |
19b6914a AL |
401 | } |
402 | ||
39bffca2 AL |
403 | static TypeInfo s390_virtio_serial = { |
404 | .name = "virtio-serial-s390", | |
405 | .parent = TYPE_VIRTIO_S390_DEVICE, | |
406 | .instance_size = sizeof(VirtIOS390Device), | |
407 | .class_init = s390_virtio_serial_class_init, | |
f3304eea AG |
408 | }; |
409 | ||
d307af79 | 410 | static int s390_virtio_busdev_init(DeviceState *dev) |
f3304eea | 411 | { |
f3304eea | 412 | VirtIOS390Device *_dev = (VirtIOS390Device *)dev; |
19b6914a | 413 | VirtIOS390DeviceClass *_info = VIRTIO_S390_DEVICE_GET_CLASS(dev); |
f3304eea AG |
414 | |
415 | return _info->init(_dev); | |
416 | } | |
417 | ||
39bffca2 | 418 | static void virtio_s390_device_class_init(ObjectClass *klass, void *data) |
f3304eea | 419 | { |
39bffca2 | 420 | DeviceClass *dc = DEVICE_CLASS(klass); |
f3304eea | 421 | |
39bffca2 AL |
422 | dc->init = s390_virtio_busdev_init; |
423 | dc->bus_info = &s390_virtio_bus_info; | |
424 | dc->unplug = qdev_simple_unplug_cb; | |
f3304eea AG |
425 | } |
426 | ||
19b6914a AL |
427 | static TypeInfo virtio_s390_device_info = { |
428 | .name = TYPE_VIRTIO_S390_DEVICE, | |
429 | .parent = TYPE_DEVICE, | |
430 | .instance_size = sizeof(VirtIOS390Device), | |
39bffca2 | 431 | .class_init = virtio_s390_device_class_init, |
e87f7fc6 | 432 | .class_size = sizeof(VirtIOS390DeviceClass), |
19b6914a AL |
433 | .abstract = true, |
434 | }; | |
435 | ||
f3304eea AG |
436 | |
437 | /***************** S390 Virtio Bus Bridge Device *******************/ | |
438 | /* Only required to have the virtio bus as child in the system bus */ | |
439 | ||
440 | static int s390_virtio_bridge_init(SysBusDevice *dev) | |
441 | { | |
442 | /* nothing */ | |
443 | return 0; | |
444 | } | |
445 | ||
999e12bb AL |
446 | static void s390_virtio_bridge_class_init(ObjectClass *klass, void *data) |
447 | { | |
39bffca2 | 448 | DeviceClass *dc = DEVICE_CLASS(klass); |
999e12bb AL |
449 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
450 | ||
451 | k->init = s390_virtio_bridge_init; | |
39bffca2 | 452 | dc->no_user = 1; |
999e12bb AL |
453 | } |
454 | ||
39bffca2 AL |
455 | static TypeInfo s390_virtio_bridge_info = { |
456 | .name = "s390-virtio-bridge", | |
457 | .parent = TYPE_SYS_BUS_DEVICE, | |
458 | .instance_size = sizeof(SysBusDevice), | |
459 | .class_init = s390_virtio_bridge_class_init, | |
f3304eea AG |
460 | }; |
461 | ||
83f7d43a | 462 | static void s390_virtio_register_types(void) |
f3304eea | 463 | { |
83f7d43a AF |
464 | type_register_static(&virtio_s390_device_info); |
465 | type_register_static(&s390_virtio_serial); | |
466 | type_register_static(&s390_virtio_blk); | |
467 | type_register_static(&s390_virtio_net); | |
39bffca2 | 468 | type_register_static(&s390_virtio_bridge_info); |
f3304eea AG |
469 | } |
470 | ||
83f7d43a | 471 | type_init(s390_virtio_register_types) |