root / hw / s390-virtio-bus.c @ 7aff0f21
History | View | Annotate | Download (11.1 kB)
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" |
29 |
#include "hw/virtio-serial.h" |
30 |
#include "hw/virtio-net.h" |
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 |
|
46 |
#define VIRTIO_EXT_CODE 0x2603 |
47 |
|
48 |
struct BusInfo s390_virtio_bus_info = {
|
49 |
.name = "s390-virtio",
|
50 |
.size = sizeof(VirtIOS390Bus),
|
51 |
}; |
52 |
|
53 |
typedef struct { |
54 |
DeviceInfo qdev; |
55 |
int (*init)(VirtIOS390Device *dev);
|
56 |
} VirtIOS390DeviceInfo; |
57 |
|
58 |
|
59 |
static const VirtIOBindings virtio_s390_bindings; |
60 |
|
61 |
static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
|
62 |
|
63 |
VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size) |
64 |
{ |
65 |
VirtIOS390Bus *bus; |
66 |
BusState *_bus; |
67 |
DeviceState *dev; |
68 |
|
69 |
/* Create bridge device */
|
70 |
dev = qdev_create(NULL, "s390-virtio-bridge"); |
71 |
qdev_init_nofail(dev); |
72 |
|
73 |
/* Create bus on bridge device */
|
74 |
|
75 |
_bus = qbus_create(&s390_virtio_bus_info, dev, "s390-virtio");
|
76 |
bus = DO_UPCAST(VirtIOS390Bus, bus, _bus); |
77 |
|
78 |
bus->dev_page = *ram_size; |
79 |
bus->dev_offs = bus->dev_page; |
80 |
bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE; |
81 |
|
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 |
|
88 |
static int s390_virtio_device_init(VirtIOS390Device *dev, VirtIODevice *vdev) |
89 |
{ |
90 |
VirtIOS390Bus *bus; |
91 |
int dev_len;
|
92 |
|
93 |
bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); |
94 |
dev->vdev = vdev; |
95 |
dev->dev_offs = bus->dev_offs; |
96 |
dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */ |
97 |
|
98 |
dev_len = VIRTIO_DEV_OFFS_CONFIG; |
99 |
dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN; |
100 |
dev_len += dev->feat_len * 2;
|
101 |
dev_len += vdev->config_len; |
102 |
|
103 |
bus->dev_offs += dev_len; |
104 |
|
105 |
virtio_bind_device(vdev, &virtio_s390_bindings, dev); |
106 |
dev->host_features = vdev->get_features(vdev, dev->host_features); |
107 |
s390_virtio_device_sync(dev); |
108 |
|
109 |
return 0; |
110 |
} |
111 |
|
112 |
static int s390_virtio_net_init(VirtIOS390Device *dev) |
113 |
{ |
114 |
VirtIODevice *vdev; |
115 |
|
116 |
vdev = virtio_net_init((DeviceState *)dev, &dev->nic, &dev->net); |
117 |
if (!vdev) {
|
118 |
return -1; |
119 |
} |
120 |
|
121 |
return s390_virtio_device_init(dev, vdev);
|
122 |
} |
123 |
|
124 |
static int s390_virtio_blk_init(VirtIOS390Device *dev) |
125 |
{ |
126 |
VirtIODevice *vdev; |
127 |
|
128 |
vdev = virtio_blk_init((DeviceState *)dev, &dev->block); |
129 |
if (!vdev) {
|
130 |
return -1; |
131 |
} |
132 |
|
133 |
return s390_virtio_device_init(dev, vdev);
|
134 |
} |
135 |
|
136 |
static int s390_virtio_serial_init(VirtIOS390Device *dev) |
137 |
{ |
138 |
VirtIOS390Bus *bus; |
139 |
VirtIODevice *vdev; |
140 |
int r;
|
141 |
|
142 |
bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); |
143 |
|
144 |
vdev = virtio_serial_init((DeviceState *)dev, &dev->serial); |
145 |
if (!vdev) {
|
146 |
return -1; |
147 |
} |
148 |
|
149 |
r = s390_virtio_device_init(dev, vdev); |
150 |
if (!r) {
|
151 |
bus->console = dev; |
152 |
} |
153 |
|
154 |
return r;
|
155 |
} |
156 |
|
157 |
static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq) |
158 |
{ |
159 |
ram_addr_t token_off; |
160 |
|
161 |
token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) + |
162 |
(vq * VIRTIO_VQCONFIG_LEN) + |
163 |
VIRTIO_VQCONFIG_OFFS_TOKEN; |
164 |
|
165 |
return ldq_phys(token_off);
|
166 |
} |
167 |
|
168 |
static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
|
169 |
{ |
170 |
VirtIODevice *vdev = dev->vdev; |
171 |
int num_vq;
|
172 |
|
173 |
for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) { |
174 |
if (!virtio_queue_get_num(vdev, num_vq)) {
|
175 |
break;
|
176 |
} |
177 |
} |
178 |
|
179 |
return num_vq;
|
180 |
} |
181 |
|
182 |
static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
|
183 |
{ |
184 |
ram_addr_t r = bus->next_ring; |
185 |
|
186 |
bus->next_ring += VIRTIO_RING_LEN; |
187 |
return r;
|
188 |
} |
189 |
|
190 |
void s390_virtio_device_sync(VirtIOS390Device *dev)
|
191 |
{ |
192 |
VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); |
193 |
ram_addr_t cur_offs; |
194 |
uint8_t num_vq; |
195 |
int i;
|
196 |
|
197 |
virtio_reset(dev->vdev); |
198 |
|
199 |
/* Sync dev space */
|
200 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id); |
201 |
|
202 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev)); |
203 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len); |
204 |
|
205 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len); |
206 |
|
207 |
num_vq = s390_virtio_device_num_vq(dev); |
208 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq); |
209 |
|
210 |
/* Sync virtqueues */
|
211 |
for (i = 0; i < num_vq; i++) { |
212 |
ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) + |
213 |
(i * VIRTIO_VQCONFIG_LEN); |
214 |
ram_addr_t vring; |
215 |
|
216 |
vring = s390_virtio_next_ring(bus); |
217 |
virtio_queue_set_addr(dev->vdev, i, vring); |
218 |
virtio_queue_set_vector(dev->vdev, i, i); |
219 |
stq_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring); |
220 |
stw_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i)); |
221 |
} |
222 |
|
223 |
cur_offs = dev->dev_offs; |
224 |
cur_offs += VIRTIO_DEV_OFFS_CONFIG; |
225 |
cur_offs += num_vq * VIRTIO_VQCONFIG_LEN; |
226 |
|
227 |
/* Sync feature bitmap */
|
228 |
stl_phys(cur_offs, bswap32(dev->host_features)); |
229 |
|
230 |
dev->feat_offs = cur_offs + dev->feat_len; |
231 |
cur_offs += dev->feat_len * 2;
|
232 |
|
233 |
/* Sync config space */
|
234 |
if (dev->vdev->get_config) {
|
235 |
dev->vdev->get_config(dev->vdev, dev->vdev->config); |
236 |
} |
237 |
|
238 |
cpu_physical_memory_write(cur_offs, |
239 |
dev->vdev->config, dev->vdev->config_len); |
240 |
cur_offs += dev->vdev->config_len; |
241 |
} |
242 |
|
243 |
void s390_virtio_device_update_status(VirtIOS390Device *dev)
|
244 |
{ |
245 |
VirtIODevice *vdev = dev->vdev; |
246 |
uint32_t features; |
247 |
|
248 |
virtio_set_status(vdev, ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS)); |
249 |
|
250 |
/* Update guest supported feature bitmap */
|
251 |
|
252 |
features = bswap32(ldl_phys(dev->feat_offs)); |
253 |
if (vdev->set_features) {
|
254 |
vdev->set_features(vdev, features); |
255 |
} |
256 |
vdev->guest_features = features; |
257 |
} |
258 |
|
259 |
VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus) |
260 |
{ |
261 |
return bus->console;
|
262 |
} |
263 |
|
264 |
/* Find a device by vring address */
|
265 |
VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus, |
266 |
ram_addr_t mem, |
267 |
int *vq_num)
|
268 |
{ |
269 |
VirtIOS390Device *_dev; |
270 |
DeviceState *dev; |
271 |
int i;
|
272 |
|
273 |
QLIST_FOREACH(dev, &bus->bus.children, sibling) { |
274 |
_dev = (VirtIOS390Device *)dev; |
275 |
for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) { |
276 |
if (!virtio_queue_get_addr(_dev->vdev, i))
|
277 |
break;
|
278 |
if (virtio_queue_get_addr(_dev->vdev, i) == mem) {
|
279 |
if (vq_num) {
|
280 |
*vq_num = i; |
281 |
} |
282 |
return _dev;
|
283 |
} |
284 |
} |
285 |
} |
286 |
|
287 |
return NULL; |
288 |
} |
289 |
|
290 |
/* Find a device by device descriptor location */
|
291 |
VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem) |
292 |
{ |
293 |
VirtIOS390Device *_dev; |
294 |
DeviceState *dev; |
295 |
|
296 |
QLIST_FOREACH(dev, &bus->bus.children, sibling) { |
297 |
_dev = (VirtIOS390Device *)dev; |
298 |
if (_dev->dev_offs == mem) {
|
299 |
return _dev;
|
300 |
} |
301 |
} |
302 |
|
303 |
return NULL; |
304 |
} |
305 |
|
306 |
static void virtio_s390_notify(void *opaque, uint16_t vector) |
307 |
{ |
308 |
VirtIOS390Device *dev = (VirtIOS390Device*)opaque; |
309 |
uint64_t token = s390_virtio_device_vq_token(dev, vector); |
310 |
CPUState *env = s390_cpu_addr2state(0);
|
311 |
|
312 |
if (kvm_enabled()) {
|
313 |
kvm_s390_virtio_irq(env, 0, token);
|
314 |
} else {
|
315 |
cpu_inject_ext(env, VIRTIO_EXT_CODE, 0, token);
|
316 |
} |
317 |
} |
318 |
|
319 |
static unsigned virtio_s390_get_features(void *opaque) |
320 |
{ |
321 |
VirtIOS390Device *dev = (VirtIOS390Device*)opaque; |
322 |
return dev->host_features;
|
323 |
} |
324 |
|
325 |
/**************** S390 Virtio Bus Device Descriptions *******************/
|
326 |
|
327 |
static const VirtIOBindings virtio_s390_bindings = { |
328 |
.notify = virtio_s390_notify, |
329 |
.get_features = virtio_s390_get_features, |
330 |
}; |
331 |
|
332 |
static VirtIOS390DeviceInfo s390_virtio_net = {
|
333 |
.init = s390_virtio_net_init, |
334 |
.qdev.name = "virtio-net-s390",
|
335 |
.qdev.alias = "virtio-net",
|
336 |
.qdev.size = sizeof(VirtIOS390Device),
|
337 |
.qdev.props = (Property[]) { |
338 |
DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic), |
339 |
DEFINE_PROP_UINT32("x-txtimer", VirtIOS390Device,
|
340 |
net.txtimer, TX_TIMER_INTERVAL), |
341 |
DEFINE_PROP_INT32("x-txburst", VirtIOS390Device,
|
342 |
net.txburst, TX_BURST), |
343 |
DEFINE_PROP_STRING("tx", VirtIOS390Device, net.tx),
|
344 |
DEFINE_PROP_END_OF_LIST(), |
345 |
}, |
346 |
}; |
347 |
|
348 |
static VirtIOS390DeviceInfo s390_virtio_blk = {
|
349 |
.init = s390_virtio_blk_init, |
350 |
.qdev.name = "virtio-blk-s390",
|
351 |
.qdev.alias = "virtio-blk",
|
352 |
.qdev.size = sizeof(VirtIOS390Device),
|
353 |
.qdev.props = (Property[]) { |
354 |
DEFINE_BLOCK_PROPERTIES(VirtIOS390Device, block), |
355 |
DEFINE_PROP_END_OF_LIST(), |
356 |
}, |
357 |
}; |
358 |
|
359 |
static VirtIOS390DeviceInfo s390_virtio_serial = {
|
360 |
.init = s390_virtio_serial_init, |
361 |
.qdev.name = "virtio-serial-s390",
|
362 |
.qdev.alias = "virtio-serial",
|
363 |
.qdev.size = sizeof(VirtIOS390Device),
|
364 |
.qdev.props = (Property[]) { |
365 |
DEFINE_PROP_UINT32("max_ports", VirtIOS390Device,
|
366 |
serial.max_virtserial_ports, 31),
|
367 |
DEFINE_PROP_END_OF_LIST(), |
368 |
}, |
369 |
}; |
370 |
|
371 |
static int s390_virtio_busdev_init(DeviceState *dev, DeviceInfo *info) |
372 |
{ |
373 |
VirtIOS390DeviceInfo *_info = (VirtIOS390DeviceInfo *)info; |
374 |
VirtIOS390Device *_dev = (VirtIOS390Device *)dev; |
375 |
|
376 |
return _info->init(_dev);
|
377 |
} |
378 |
|
379 |
static void s390_virtio_bus_register_withprop(VirtIOS390DeviceInfo *info) |
380 |
{ |
381 |
info->qdev.init = s390_virtio_busdev_init; |
382 |
info->qdev.bus_info = &s390_virtio_bus_info; |
383 |
|
384 |
assert(info->qdev.size >= sizeof(VirtIOS390Device));
|
385 |
qdev_register(&info->qdev); |
386 |
} |
387 |
|
388 |
static void s390_virtio_register(void) |
389 |
{ |
390 |
s390_virtio_bus_register_withprop(&s390_virtio_serial); |
391 |
s390_virtio_bus_register_withprop(&s390_virtio_blk); |
392 |
s390_virtio_bus_register_withprop(&s390_virtio_net); |
393 |
} |
394 |
device_init(s390_virtio_register); |
395 |
|
396 |
|
397 |
/***************** S390 Virtio Bus Bridge Device *******************/
|
398 |
/* Only required to have the virtio bus as child in the system bus */
|
399 |
|
400 |
static int s390_virtio_bridge_init(SysBusDevice *dev) |
401 |
{ |
402 |
/* nothing */
|
403 |
return 0; |
404 |
} |
405 |
|
406 |
static SysBusDeviceInfo s390_virtio_bridge_info = {
|
407 |
.init = s390_virtio_bridge_init, |
408 |
.qdev.name = "s390-virtio-bridge",
|
409 |
.qdev.size = sizeof(SysBusDevice),
|
410 |
.qdev.no_user = 1,
|
411 |
}; |
412 |
|
413 |
static void s390_virtio_register_devices(void) |
414 |
{ |
415 |
sysbus_register_withprop(&s390_virtio_bridge_info); |
416 |
} |
417 |
|
418 |
device_init(s390_virtio_register_devices) |