root / hw / s390-virtio-bus.c @ 704a76fc
History | View | Annotate | Download (10.3 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-console.h" |
30 |
#include "hw/sysbus.h" |
31 |
#include "kvm.h" |
32 |
|
33 |
#include "hw/s390-virtio-bus.h" |
34 |
|
35 |
/* #define DEBUG_S390 */
|
36 |
|
37 |
#ifdef DEBUG_S390
|
38 |
#define dprintf(fmt, ...) \
|
39 |
do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
40 |
#else
|
41 |
#define dprintf(fmt, ...) \
|
42 |
do { } while (0) |
43 |
#endif
|
44 |
|
45 |
struct BusInfo s390_virtio_bus_info = {
|
46 |
.name = "s390-virtio",
|
47 |
.size = sizeof(VirtIOS390Bus),
|
48 |
}; |
49 |
|
50 |
typedef struct { |
51 |
DeviceInfo qdev; |
52 |
int (*init)(VirtIOS390Device *dev);
|
53 |
} VirtIOS390DeviceInfo; |
54 |
|
55 |
|
56 |
static const VirtIOBindings virtio_s390_bindings; |
57 |
|
58 |
static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev);
|
59 |
static void s390_virtio_device_sync(VirtIOS390Device *dev); |
60 |
|
61 |
VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size) |
62 |
{ |
63 |
VirtIOS390Bus *bus; |
64 |
BusState *_bus; |
65 |
DeviceState *dev; |
66 |
|
67 |
/* Create bridge device */
|
68 |
dev = qdev_create(NULL, "s390-virtio-bridge"); |
69 |
qdev_init_nofail(dev); |
70 |
|
71 |
/* Create bus on bridge device */
|
72 |
|
73 |
_bus = qbus_create(&s390_virtio_bus_info, dev, "s390-virtio");
|
74 |
bus = DO_UPCAST(VirtIOS390Bus, bus, _bus); |
75 |
|
76 |
bus->dev_page = *ram_size; |
77 |
bus->dev_offs = bus->dev_page; |
78 |
bus->next_ring = bus->dev_page + TARGET_PAGE_SIZE; |
79 |
|
80 |
/* Allocate RAM for VirtIO device pages (descriptors, queues, rings) */
|
81 |
*ram_size += S390_DEVICE_PAGES * TARGET_PAGE_SIZE; |
82 |
|
83 |
return bus;
|
84 |
} |
85 |
|
86 |
static int s390_virtio_device_init(VirtIOS390Device *dev, VirtIODevice *vdev) |
87 |
{ |
88 |
VirtIOS390Bus *bus; |
89 |
int dev_len;
|
90 |
|
91 |
bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); |
92 |
dev->vdev = vdev; |
93 |
dev->dev_offs = bus->dev_offs; |
94 |
dev->feat_len = sizeof(uint32_t); /* always keep 32 bits features */ |
95 |
|
96 |
dev_len = VIRTIO_DEV_OFFS_CONFIG; |
97 |
dev_len += s390_virtio_device_num_vq(dev) * VIRTIO_VQCONFIG_LEN; |
98 |
dev_len += dev->feat_len * 2;
|
99 |
dev_len += vdev->config_len; |
100 |
|
101 |
bus->dev_offs += dev_len; |
102 |
|
103 |
virtio_bind_device(vdev, &virtio_s390_bindings, dev); |
104 |
s390_virtio_device_sync(dev); |
105 |
|
106 |
return 0; |
107 |
} |
108 |
|
109 |
static int s390_virtio_net_init(VirtIOS390Device *dev) |
110 |
{ |
111 |
VirtIODevice *vdev; |
112 |
|
113 |
vdev = virtio_net_init((DeviceState *)dev, &dev->nic); |
114 |
if (!vdev) {
|
115 |
return -1; |
116 |
} |
117 |
|
118 |
return s390_virtio_device_init(dev, vdev);
|
119 |
} |
120 |
|
121 |
static int s390_virtio_blk_init(VirtIOS390Device *dev) |
122 |
{ |
123 |
VirtIODevice *vdev; |
124 |
|
125 |
vdev = virtio_blk_init((DeviceState *)dev, dev->dinfo); |
126 |
if (!vdev) {
|
127 |
return -1; |
128 |
} |
129 |
|
130 |
return s390_virtio_device_init(dev, vdev);
|
131 |
} |
132 |
|
133 |
static int s390_virtio_console_init(VirtIOS390Device *dev) |
134 |
{ |
135 |
VirtIOS390Bus *bus; |
136 |
VirtIODevice *vdev; |
137 |
int r;
|
138 |
|
139 |
bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); |
140 |
|
141 |
vdev = virtio_console_init((DeviceState *)dev); |
142 |
if (!vdev) {
|
143 |
return -1; |
144 |
} |
145 |
|
146 |
r = s390_virtio_device_init(dev, vdev); |
147 |
if (!r) {
|
148 |
bus->console = dev; |
149 |
} |
150 |
|
151 |
return r;
|
152 |
} |
153 |
|
154 |
static uint64_t s390_virtio_device_vq_token(VirtIOS390Device *dev, int vq) |
155 |
{ |
156 |
ram_addr_t token_off; |
157 |
|
158 |
token_off = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) + |
159 |
(vq * VIRTIO_VQCONFIG_LEN) + |
160 |
VIRTIO_VQCONFIG_OFFS_TOKEN; |
161 |
|
162 |
return ldq_phys(token_off);
|
163 |
} |
164 |
|
165 |
static ram_addr_t s390_virtio_device_num_vq(VirtIOS390Device *dev)
|
166 |
{ |
167 |
VirtIODevice *vdev = dev->vdev; |
168 |
int num_vq;
|
169 |
|
170 |
for (num_vq = 0; num_vq < VIRTIO_PCI_QUEUE_MAX; num_vq++) { |
171 |
if (!virtio_queue_get_num(vdev, num_vq)) {
|
172 |
break;
|
173 |
} |
174 |
} |
175 |
|
176 |
return num_vq;
|
177 |
} |
178 |
|
179 |
static ram_addr_t s390_virtio_next_ring(VirtIOS390Bus *bus)
|
180 |
{ |
181 |
ram_addr_t r = bus->next_ring; |
182 |
|
183 |
bus->next_ring += VIRTIO_RING_LEN; |
184 |
return r;
|
185 |
} |
186 |
|
187 |
static void s390_virtio_device_sync(VirtIOS390Device *dev) |
188 |
{ |
189 |
VirtIOS390Bus *bus = DO_UPCAST(VirtIOS390Bus, bus, dev->qdev.parent_bus); |
190 |
ram_addr_t cur_offs; |
191 |
uint8_t num_vq; |
192 |
int i;
|
193 |
|
194 |
virtio_reset(dev->vdev); |
195 |
|
196 |
/* Sync dev space */
|
197 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_TYPE, dev->vdev->device_id); |
198 |
|
199 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, s390_virtio_device_num_vq(dev)); |
200 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_FEATURE_LEN, dev->feat_len); |
201 |
|
202 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG_LEN, dev->vdev->config_len); |
203 |
|
204 |
num_vq = s390_virtio_device_num_vq(dev); |
205 |
stb_phys(dev->dev_offs + VIRTIO_DEV_OFFS_NUM_VQ, num_vq); |
206 |
|
207 |
/* Sync virtqueues */
|
208 |
for (i = 0; i < num_vq; i++) { |
209 |
ram_addr_t vq = (dev->dev_offs + VIRTIO_DEV_OFFS_CONFIG) + |
210 |
(i * VIRTIO_VQCONFIG_LEN); |
211 |
ram_addr_t vring; |
212 |
|
213 |
vring = s390_virtio_next_ring(bus); |
214 |
virtio_queue_set_addr(dev->vdev, i, vring); |
215 |
virtio_queue_set_vector(dev->vdev, i, i); |
216 |
stq_phys(vq + VIRTIO_VQCONFIG_OFFS_ADDRESS, vring); |
217 |
stw_phys(vq + VIRTIO_VQCONFIG_OFFS_NUM, virtio_queue_get_num(dev->vdev, i)); |
218 |
} |
219 |
|
220 |
cur_offs = dev->dev_offs; |
221 |
cur_offs += VIRTIO_DEV_OFFS_CONFIG; |
222 |
cur_offs += num_vq * VIRTIO_VQCONFIG_LEN; |
223 |
|
224 |
/* Sync feature bitmap */
|
225 |
if (dev->vdev->get_features) {
|
226 |
stl_phys(cur_offs, dev->vdev->get_features(dev->vdev)); |
227 |
} |
228 |
|
229 |
dev->feat_offs = cur_offs + dev->feat_len; |
230 |
cur_offs += dev->feat_len * 2;
|
231 |
|
232 |
/* Sync config space */
|
233 |
if (dev->vdev->get_config) {
|
234 |
dev->vdev->get_config(dev->vdev, dev->vdev->config); |
235 |
} |
236 |
|
237 |
cpu_physical_memory_rw(cur_offs, dev->vdev->config, dev->vdev->config_len, 1);
|
238 |
cur_offs += dev->vdev->config_len; |
239 |
} |
240 |
|
241 |
void s390_virtio_device_update_status(VirtIOS390Device *dev)
|
242 |
{ |
243 |
VirtIODevice *vdev = dev->vdev; |
244 |
uint32_t features; |
245 |
|
246 |
vdev->status = ldub_phys(dev->dev_offs + VIRTIO_DEV_OFFS_STATUS); |
247 |
|
248 |
/* Update guest supported feature bitmap */
|
249 |
|
250 |
features = ldl_phys(dev->feat_offs); |
251 |
if (vdev->set_features) {
|
252 |
vdev->set_features(vdev, features); |
253 |
} |
254 |
vdev->guest_features = features; |
255 |
} |
256 |
|
257 |
VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus) |
258 |
{ |
259 |
return bus->console;
|
260 |
} |
261 |
|
262 |
/* Find a device by vring address */
|
263 |
VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus, |
264 |
ram_addr_t mem, |
265 |
int *vq_num)
|
266 |
{ |
267 |
VirtIOS390Device *_dev; |
268 |
DeviceState *dev; |
269 |
int i;
|
270 |
|
271 |
QLIST_FOREACH(dev, &bus->bus.children, sibling) { |
272 |
_dev = (VirtIOS390Device *)dev; |
273 |
for(i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) { |
274 |
if (!virtio_queue_get_addr(_dev->vdev, i))
|
275 |
break;
|
276 |
if (virtio_queue_get_addr(_dev->vdev, i) == mem) {
|
277 |
if (vq_num) {
|
278 |
*vq_num = i; |
279 |
} |
280 |
return _dev;
|
281 |
} |
282 |
} |
283 |
} |
284 |
|
285 |
return NULL; |
286 |
} |
287 |
|
288 |
/* Find a device by device descriptor location */
|
289 |
VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem) |
290 |
{ |
291 |
VirtIOS390Device *_dev; |
292 |
DeviceState *dev; |
293 |
|
294 |
QLIST_FOREACH(dev, &bus->bus.children, sibling) { |
295 |
_dev = (VirtIOS390Device *)dev; |
296 |
if (_dev->dev_offs == mem) {
|
297 |
return _dev;
|
298 |
} |
299 |
} |
300 |
|
301 |
return NULL; |
302 |
} |
303 |
|
304 |
static void virtio_s390_notify(void *opaque, uint16_t vector) |
305 |
{ |
306 |
VirtIOS390Device *dev = (VirtIOS390Device*)opaque; |
307 |
uint64_t token = s390_virtio_device_vq_token(dev, vector); |
308 |
|
309 |
/* XXX kvm dependency! */
|
310 |
kvm_s390_virtio_irq(s390_cpu_addr2state(0), 0, token); |
311 |
} |
312 |
|
313 |
/**************** S390 Virtio Bus Device Descriptions *******************/
|
314 |
|
315 |
static const VirtIOBindings virtio_s390_bindings = { |
316 |
.notify = virtio_s390_notify, |
317 |
}; |
318 |
|
319 |
static VirtIOS390DeviceInfo s390_virtio_net = {
|
320 |
.init = s390_virtio_net_init, |
321 |
.qdev.name = "virtio-net-s390",
|
322 |
.qdev.size = sizeof(VirtIOS390Device),
|
323 |
.qdev.props = (Property[]) { |
324 |
DEFINE_NIC_PROPERTIES(VirtIOS390Device, nic), |
325 |
DEFINE_PROP_END_OF_LIST(), |
326 |
}, |
327 |
}; |
328 |
|
329 |
static VirtIOS390DeviceInfo s390_virtio_blk = {
|
330 |
.init = s390_virtio_blk_init, |
331 |
.qdev.name = "virtio-blk-s390",
|
332 |
.qdev.size = sizeof(VirtIOS390Device),
|
333 |
.qdev.props = (Property[]) { |
334 |
DEFINE_PROP_DRIVE("drive", VirtIOS390Device, dinfo),
|
335 |
DEFINE_PROP_END_OF_LIST(), |
336 |
}, |
337 |
}; |
338 |
|
339 |
static VirtIOS390DeviceInfo s390_virtio_console = {
|
340 |
.init = s390_virtio_console_init, |
341 |
.qdev.name = "virtio-console-s390",
|
342 |
.qdev.size = sizeof(VirtIOS390Device),
|
343 |
.qdev.props = (Property[]) { |
344 |
DEFINE_PROP_END_OF_LIST(), |
345 |
}, |
346 |
}; |
347 |
|
348 |
static int s390_virtio_busdev_init(DeviceState *dev, DeviceInfo *info) |
349 |
{ |
350 |
VirtIOS390DeviceInfo *_info = (VirtIOS390DeviceInfo *)info; |
351 |
VirtIOS390Device *_dev = (VirtIOS390Device *)dev; |
352 |
|
353 |
return _info->init(_dev);
|
354 |
} |
355 |
|
356 |
static void s390_virtio_bus_register_withprop(VirtIOS390DeviceInfo *info) |
357 |
{ |
358 |
info->qdev.init = s390_virtio_busdev_init; |
359 |
info->qdev.bus_info = &s390_virtio_bus_info; |
360 |
|
361 |
assert(info->qdev.size >= sizeof(VirtIOS390Device));
|
362 |
qdev_register(&info->qdev); |
363 |
} |
364 |
|
365 |
static void s390_virtio_register(void) |
366 |
{ |
367 |
s390_virtio_bus_register_withprop(&s390_virtio_console); |
368 |
s390_virtio_bus_register_withprop(&s390_virtio_blk); |
369 |
s390_virtio_bus_register_withprop(&s390_virtio_net); |
370 |
} |
371 |
device_init(s390_virtio_register); |
372 |
|
373 |
|
374 |
/***************** S390 Virtio Bus Bridge Device *******************/
|
375 |
/* Only required to have the virtio bus as child in the system bus */
|
376 |
|
377 |
static int s390_virtio_bridge_init(SysBusDevice *dev) |
378 |
{ |
379 |
/* nothing */
|
380 |
return 0; |
381 |
} |
382 |
|
383 |
static SysBusDeviceInfo s390_virtio_bridge_info = {
|
384 |
.init = s390_virtio_bridge_init, |
385 |
.qdev.name = "s390-virtio-bridge",
|
386 |
.qdev.size = sizeof(SysBusDevice),
|
387 |
.qdev.no_user = 1,
|
388 |
}; |
389 |
|
390 |
static void s390_virtio_register_devices(void) |
391 |
{ |
392 |
sysbus_register_withprop(&s390_virtio_bridge_info); |
393 |
} |
394 |
|
395 |
device_init(s390_virtio_register_devices) |