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1
/*
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 * Virtio PCI Bindings
3
 *
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 * Copyright IBM, Corp. 2007
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 * Copyright (c) 2009 CodeSourcery
6
 *
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 * Authors:
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 *  Anthony Liguori   <aliguori@us.ibm.com>
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 *  Paul Brook        <paul@codesourcery.com>
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 *
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 * This work is licensed under the terms of the GNU GPL, version 2.  See
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 * the COPYING file in the top-level directory.
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 *
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 */
15

    
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#include <inttypes.h>
17

    
18
#include "virtio.h"
19
#include "virtio-blk.h"
20
#include "virtio-net.h"
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#include "pci.h"
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#include "qemu-error.h"
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#include "msix.h"
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#include "net.h"
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#include "loader.h"
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#include "kvm.h"
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#include "blockdev.h"
28

    
29
/* from Linux's linux/virtio_pci.h */
30

    
31
/* A 32-bit r/o bitmask of the features supported by the host */
32
#define VIRTIO_PCI_HOST_FEATURES        0
33

    
34
/* A 32-bit r/w bitmask of features activated by the guest */
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#define VIRTIO_PCI_GUEST_FEATURES       4
36

    
37
/* A 32-bit r/w PFN for the currently selected queue */
38
#define VIRTIO_PCI_QUEUE_PFN            8
39

    
40
/* A 16-bit r/o queue size for the currently selected queue */
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#define VIRTIO_PCI_QUEUE_NUM            12
42

    
43
/* A 16-bit r/w queue selector */
44
#define VIRTIO_PCI_QUEUE_SEL            14
45

    
46
/* A 16-bit r/w queue notifier */
47
#define VIRTIO_PCI_QUEUE_NOTIFY         16
48

    
49
/* An 8-bit device status register.  */
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#define VIRTIO_PCI_STATUS               18
51

    
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/* An 8-bit r/o interrupt status register.  Reading the value will return the
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 * current contents of the ISR and will also clear it.  This is effectively
54
 * a read-and-acknowledge. */
55
#define VIRTIO_PCI_ISR                  19
56

    
57
/* MSI-X registers: only enabled if MSI-X is enabled. */
58
/* A 16-bit vector for configuration changes. */
59
#define VIRTIO_MSI_CONFIG_VECTOR        20
60
/* A 16-bit vector for selected queue notifications. */
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#define VIRTIO_MSI_QUEUE_VECTOR         22
62

    
63
/* Config space size */
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#define VIRTIO_PCI_CONFIG_NOMSI         20
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#define VIRTIO_PCI_CONFIG_MSI           24
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#define VIRTIO_PCI_REGION_SIZE(dev)     (msix_present(dev) ? \
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                                         VIRTIO_PCI_CONFIG_MSI : \
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                                         VIRTIO_PCI_CONFIG_NOMSI)
69

    
70
/* The remaining space is defined by each driver as the per-driver
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 * configuration space */
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#define VIRTIO_PCI_CONFIG(dev)          (msix_enabled(dev) ? \
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                                         VIRTIO_PCI_CONFIG_MSI : \
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                                         VIRTIO_PCI_CONFIG_NOMSI)
75

    
76
/* Virtio ABI version, if we increment this, we break the guest driver. */
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#define VIRTIO_PCI_ABI_VERSION          0
78

    
79
/* How many bits to shift physical queue address written to QUEUE_PFN.
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 * 12 is historical, and due to x86 page size. */
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#define VIRTIO_PCI_QUEUE_ADDR_SHIFT    12
82

    
83
/* We can catch some guest bugs inside here so we continue supporting older
84
   guests. */
85
#define VIRTIO_PCI_BUG_BUS_MASTER        (1 << 0)
86

    
87
/* QEMU doesn't strictly need write barriers since everything runs in
88
 * lock-step.  We'll leave the calls to wmb() in though to make it obvious for
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 * KVM or if kqemu gets SMP support.
90
 */
91
#define wmb() do { } while (0)
92

    
93
/* PCI bindings.  */
94

    
95
typedef struct {
96
    PCIDevice pci_dev;
97
    VirtIODevice *vdev;
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    uint32_t bugs;
99
    uint32_t addr;
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    uint32_t class_code;
101
    uint32_t nvectors;
102
    BlockConf block;
103
    NICConf nic;
104
    uint32_t host_features;
105
#ifdef CONFIG_LINUX
106
    V9fsConf fsconf;
107
#endif
108
    /* Max. number of ports we can have for a the virtio-serial device */
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    uint32_t max_virtserial_ports;
110
    virtio_net_conf net;
111
} VirtIOPCIProxy;
112

    
113
/* virtio device */
114

    
115
static void virtio_pci_notify(void *opaque, uint16_t vector)
116
{
117
    VirtIOPCIProxy *proxy = opaque;
118
    if (msix_enabled(&proxy->pci_dev))
119
        msix_notify(&proxy->pci_dev, vector);
120
    else
121
        qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
122
}
123

    
124
static void virtio_pci_save_config(void * opaque, QEMUFile *f)
125
{
126
    VirtIOPCIProxy *proxy = opaque;
127
    pci_device_save(&proxy->pci_dev, f);
128
    msix_save(&proxy->pci_dev, f);
129
    if (msix_present(&proxy->pci_dev))
130
        qemu_put_be16(f, proxy->vdev->config_vector);
131
}
132

    
133
static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f)
134
{
135
    VirtIOPCIProxy *proxy = opaque;
136
    if (msix_present(&proxy->pci_dev))
137
        qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
138
}
139

    
140
static int virtio_pci_load_config(void * opaque, QEMUFile *f)
141
{
142
    VirtIOPCIProxy *proxy = opaque;
143
    int ret;
144
    ret = pci_device_load(&proxy->pci_dev, f);
145
    if (ret) {
146
        return ret;
147
    }
148
    msix_load(&proxy->pci_dev, f);
149
    if (msix_present(&proxy->pci_dev)) {
150
        qemu_get_be16s(f, &proxy->vdev->config_vector);
151
    } else {
152
        proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
153
    }
154
    if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
155
        return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
156
    }
157

    
158
    /* Try to find out if the guest has bus master disabled, but is
159
       in ready state. Then we have a buggy guest OS. */
160
    if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
161
        !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
162
        proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
163
    }
164
    return 0;
165
}
166

    
167
static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
168
{
169
    VirtIOPCIProxy *proxy = opaque;
170
    uint16_t vector;
171
    if (msix_present(&proxy->pci_dev)) {
172
        qemu_get_be16s(f, &vector);
173
    } else {
174
        vector = VIRTIO_NO_VECTOR;
175
    }
176
    virtio_queue_set_vector(proxy->vdev, n, vector);
177
    if (vector != VIRTIO_NO_VECTOR) {
178
        return msix_vector_use(&proxy->pci_dev, vector);
179
    }
180
    return 0;
181
}
182

    
183
static void virtio_pci_reset(DeviceState *d)
184
{
185
    VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev);
186
    virtio_reset(proxy->vdev);
187
    msix_reset(&proxy->pci_dev);
188
    proxy->bugs = 0;
189
}
190

    
191
static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
192
{
193
    VirtIOPCIProxy *proxy = opaque;
194
    VirtIODevice *vdev = proxy->vdev;
195
    target_phys_addr_t pa;
196

    
197
    switch (addr) {
198
    case VIRTIO_PCI_GUEST_FEATURES:
199
        /* Guest does not negotiate properly?  We have to assume nothing. */
200
        if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
201
            if (vdev->bad_features)
202
                val = proxy->host_features & vdev->bad_features(vdev);
203
            else
204
                val = 0;
205
        }
206
        if (vdev->set_features)
207
            vdev->set_features(vdev, val);
208
        vdev->guest_features = val;
209
        break;
210
    case VIRTIO_PCI_QUEUE_PFN:
211
        pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
212
        if (pa == 0) {
213
            virtio_reset(proxy->vdev);
214
            msix_unuse_all_vectors(&proxy->pci_dev);
215
        }
216
        else
217
            virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
218
        break;
219
    case VIRTIO_PCI_QUEUE_SEL:
220
        if (val < VIRTIO_PCI_QUEUE_MAX)
221
            vdev->queue_sel = val;
222
        break;
223
    case VIRTIO_PCI_QUEUE_NOTIFY:
224
        virtio_queue_notify(vdev, val);
225
        break;
226
    case VIRTIO_PCI_STATUS:
227
        virtio_set_status(vdev, val & 0xFF);
228
        if (vdev->status == 0) {
229
            virtio_reset(proxy->vdev);
230
            msix_unuse_all_vectors(&proxy->pci_dev);
231
        }
232

    
233
        /* Linux before 2.6.34 sets the device as OK without enabling
234
           the PCI device bus master bit. In this case we need to disable
235
           some safety checks. */
236
        if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
237
            !(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
238
            proxy->bugs |= VIRTIO_PCI_BUG_BUS_MASTER;
239
        }
240
        break;
241
    case VIRTIO_MSI_CONFIG_VECTOR:
242
        msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
243
        /* Make it possible for guest to discover an error took place. */
244
        if (msix_vector_use(&proxy->pci_dev, val) < 0)
245
            val = VIRTIO_NO_VECTOR;
246
        vdev->config_vector = val;
247
        break;
248
    case VIRTIO_MSI_QUEUE_VECTOR:
249
        msix_vector_unuse(&proxy->pci_dev,
250
                          virtio_queue_vector(vdev, vdev->queue_sel));
251
        /* Make it possible for guest to discover an error took place. */
252
        if (msix_vector_use(&proxy->pci_dev, val) < 0)
253
            val = VIRTIO_NO_VECTOR;
254
        virtio_queue_set_vector(vdev, vdev->queue_sel, val);
255
        break;
256
    default:
257
        fprintf(stderr, "%s: unexpected address 0x%x value 0x%x\n",
258
                __func__, addr, val);
259
        break;
260
    }
261
}
262

    
263
static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
264
{
265
    VirtIODevice *vdev = proxy->vdev;
266
    uint32_t ret = 0xFFFFFFFF;
267

    
268
    switch (addr) {
269
    case VIRTIO_PCI_HOST_FEATURES:
270
        ret = proxy->host_features;
271
        break;
272
    case VIRTIO_PCI_GUEST_FEATURES:
273
        ret = vdev->guest_features;
274
        break;
275
    case VIRTIO_PCI_QUEUE_PFN:
276
        ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
277
              >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
278
        break;
279
    case VIRTIO_PCI_QUEUE_NUM:
280
        ret = virtio_queue_get_num(vdev, vdev->queue_sel);
281
        break;
282
    case VIRTIO_PCI_QUEUE_SEL:
283
        ret = vdev->queue_sel;
284
        break;
285
    case VIRTIO_PCI_STATUS:
286
        ret = vdev->status;
287
        break;
288
    case VIRTIO_PCI_ISR:
289
        /* reading from the ISR also clears it. */
290
        ret = vdev->isr;
291
        vdev->isr = 0;
292
        qemu_set_irq(proxy->pci_dev.irq[0], 0);
293
        break;
294
    case VIRTIO_MSI_CONFIG_VECTOR:
295
        ret = vdev->config_vector;
296
        break;
297
    case VIRTIO_MSI_QUEUE_VECTOR:
298
        ret = virtio_queue_vector(vdev, vdev->queue_sel);
299
        break;
300
    default:
301
        break;
302
    }
303

    
304
    return ret;
305
}
306

    
307
static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr)
308
{
309
    VirtIOPCIProxy *proxy = opaque;
310
    uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
311
    addr -= proxy->addr;
312
    if (addr < config)
313
        return virtio_ioport_read(proxy, addr);
314
    addr -= config;
315
    return virtio_config_readb(proxy->vdev, addr);
316
}
317

    
318
static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr)
319
{
320
    VirtIOPCIProxy *proxy = opaque;
321
    uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
322
    addr -= proxy->addr;
323
    if (addr < config)
324
        return virtio_ioport_read(proxy, addr);
325
    addr -= config;
326
    return virtio_config_readw(proxy->vdev, addr);
327
}
328

    
329
static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr)
330
{
331
    VirtIOPCIProxy *proxy = opaque;
332
    uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
333
    addr -= proxy->addr;
334
    if (addr < config)
335
        return virtio_ioport_read(proxy, addr);
336
    addr -= config;
337
    return virtio_config_readl(proxy->vdev, addr);
338
}
339

    
340
static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val)
341
{
342
    VirtIOPCIProxy *proxy = opaque;
343
    uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
344
    addr -= proxy->addr;
345
    if (addr < config) {
346
        virtio_ioport_write(proxy, addr, val);
347
        return;
348
    }
349
    addr -= config;
350
    virtio_config_writeb(proxy->vdev, addr, val);
351
}
352

    
353
static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val)
354
{
355
    VirtIOPCIProxy *proxy = opaque;
356
    uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
357
    addr -= proxy->addr;
358
    if (addr < config) {
359
        virtio_ioport_write(proxy, addr, val);
360
        return;
361
    }
362
    addr -= config;
363
    virtio_config_writew(proxy->vdev, addr, val);
364
}
365

    
366
static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
367
{
368
    VirtIOPCIProxy *proxy = opaque;
369
    uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
370
    addr -= proxy->addr;
371
    if (addr < config) {
372
        virtio_ioport_write(proxy, addr, val);
373
        return;
374
    }
375
    addr -= config;
376
    virtio_config_writel(proxy->vdev, addr, val);
377
}
378

    
379
static void virtio_map(PCIDevice *pci_dev, int region_num,
380
                       pcibus_t addr, pcibus_t size, int type)
381
{
382
    VirtIOPCIProxy *proxy = container_of(pci_dev, VirtIOPCIProxy, pci_dev);
383
    VirtIODevice *vdev = proxy->vdev;
384
    unsigned config_len = VIRTIO_PCI_REGION_SIZE(pci_dev) + vdev->config_len;
385

    
386
    proxy->addr = addr;
387

    
388
    register_ioport_write(addr, config_len, 1, virtio_pci_config_writeb, proxy);
389
    register_ioport_write(addr, config_len, 2, virtio_pci_config_writew, proxy);
390
    register_ioport_write(addr, config_len, 4, virtio_pci_config_writel, proxy);
391
    register_ioport_read(addr, config_len, 1, virtio_pci_config_readb, proxy);
392
    register_ioport_read(addr, config_len, 2, virtio_pci_config_readw, proxy);
393
    register_ioport_read(addr, config_len, 4, virtio_pci_config_readl, proxy);
394

    
395
    if (vdev->config_len)
396
        vdev->get_config(vdev, vdev->config);
397
}
398

    
399
static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
400
                                uint32_t val, int len)
401
{
402
    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
403

    
404
    if (PCI_COMMAND == address) {
405
        if (!(val & PCI_COMMAND_MASTER)) {
406
            if (!(proxy->bugs & VIRTIO_PCI_BUG_BUS_MASTER)) {
407
                virtio_set_status(proxy->vdev,
408
                                  proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
409
            }
410
        }
411
    }
412

    
413
    pci_default_write_config(pci_dev, address, val, len);
414
    msix_write_config(pci_dev, address, val, len);
415
}
416

    
417
static unsigned virtio_pci_get_features(void *opaque)
418
{
419
    VirtIOPCIProxy *proxy = opaque;
420
    return proxy->host_features;
421
}
422

    
423
static void virtio_pci_guest_notifier_read(void *opaque)
424
{
425
    VirtQueue *vq = opaque;
426
    EventNotifier *n = virtio_queue_get_guest_notifier(vq);
427
    if (event_notifier_test_and_clear(n)) {
428
        virtio_irq(vq);
429
    }
430
}
431

    
432
static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign)
433
{
434
    VirtIOPCIProxy *proxy = opaque;
435
    VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
436
    EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
437

    
438
    if (assign) {
439
        int r = event_notifier_init(notifier, 0);
440
        if (r < 0) {
441
            return r;
442
        }
443
        qemu_set_fd_handler(event_notifier_get_fd(notifier),
444
                            virtio_pci_guest_notifier_read, NULL, vq);
445
    } else {
446
        qemu_set_fd_handler(event_notifier_get_fd(notifier),
447
                            NULL, NULL, NULL);
448
        event_notifier_cleanup(notifier);
449
    }
450

    
451
    return 0;
452
}
453

    
454
static int virtio_pci_set_guest_notifiers(void *opaque, bool assign)
455
{
456
    VirtIOPCIProxy *proxy = opaque;
457
    VirtIODevice *vdev = proxy->vdev;
458
    int r, n;
459

    
460
    for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
461
        if (!virtio_queue_get_num(vdev, n)) {
462
            break;
463
        }
464

    
465
        r = virtio_pci_set_guest_notifier(opaque, n, assign);
466
        if (r < 0) {
467
            goto assign_error;
468
        }
469
    }
470

    
471
    return 0;
472

    
473
assign_error:
474
    /* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
475
    while (--n >= 0) {
476
        virtio_pci_set_guest_notifier(opaque, n, !assign);
477
    }
478
    return r;
479
}
480

    
481
static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign)
482
{
483
    VirtIOPCIProxy *proxy = opaque;
484
    VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
485
    EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
486
    int r;
487
    if (assign) {
488
        r = event_notifier_init(notifier, 1);
489
        if (r < 0) {
490
            return r;
491
        }
492
        r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
493
                                       proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
494
                                       n, assign);
495
        if (r < 0) {
496
            event_notifier_cleanup(notifier);
497
        }
498
    } else {
499
        r = kvm_set_ioeventfd_pio_word(event_notifier_get_fd(notifier),
500
                                       proxy->addr + VIRTIO_PCI_QUEUE_NOTIFY,
501
                                       n, assign);
502
        if (r < 0) {
503
            return r;
504
        }
505
        event_notifier_cleanup(notifier);
506
    }
507
    return r;
508
}
509

    
510
static const VirtIOBindings virtio_pci_bindings = {
511
    .notify = virtio_pci_notify,
512
    .save_config = virtio_pci_save_config,
513
    .load_config = virtio_pci_load_config,
514
    .save_queue = virtio_pci_save_queue,
515
    .load_queue = virtio_pci_load_queue,
516
    .get_features = virtio_pci_get_features,
517
    .set_host_notifier = virtio_pci_set_host_notifier,
518
    .set_guest_notifiers = virtio_pci_set_guest_notifiers,
519
};
520

    
521
static void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev,
522
                            uint16_t vendor, uint16_t device,
523
                            uint16_t class_code, uint8_t pif)
524
{
525
    uint8_t *config;
526
    uint32_t size;
527

    
528
    proxy->vdev = vdev;
529

    
530
    config = proxy->pci_dev.config;
531
    pci_config_set_vendor_id(config, vendor);
532
    pci_config_set_device_id(config, device);
533

    
534
    config[0x08] = VIRTIO_PCI_ABI_VERSION;
535

    
536
    config[0x09] = pif;
537
    pci_config_set_class(config, class_code);
538

    
539
    config[0x2c] = vendor & 0xFF;
540
    config[0x2d] = (vendor >> 8) & 0xFF;
541
    config[0x2e] = vdev->device_id & 0xFF;
542
    config[0x2f] = (vdev->device_id >> 8) & 0xFF;
543

    
544
    config[0x3d] = 1;
545

    
546
    if (vdev->nvectors && !msix_init(&proxy->pci_dev, vdev->nvectors, 1, 0)) {
547
        pci_register_bar(&proxy->pci_dev, 1,
548
                         msix_bar_size(&proxy->pci_dev),
549
                         PCI_BASE_ADDRESS_SPACE_MEMORY,
550
                         msix_mmio_map);
551
    } else
552
        vdev->nvectors = 0;
553

    
554
    proxy->pci_dev.config_write = virtio_write_config;
555

    
556
    size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
557
    if (size & (size-1))
558
        size = 1 << qemu_fls(size);
559

    
560
    pci_register_bar(&proxy->pci_dev, 0, size, PCI_BASE_ADDRESS_SPACE_IO,
561
                           virtio_map);
562

    
563
    virtio_bind_device(vdev, &virtio_pci_bindings, proxy);
564
    proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
565
    proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
566
    proxy->host_features = vdev->get_features(vdev, proxy->host_features);
567
}
568

    
569
static int virtio_blk_init_pci(PCIDevice *pci_dev)
570
{
571
    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
572
    VirtIODevice *vdev;
573

    
574
    if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
575
        proxy->class_code != PCI_CLASS_STORAGE_OTHER)
576
        proxy->class_code = PCI_CLASS_STORAGE_SCSI;
577

    
578
    vdev = virtio_blk_init(&pci_dev->qdev, &proxy->block);
579
    if (!vdev) {
580
        return -1;
581
    }
582
    vdev->nvectors = proxy->nvectors;
583
    virtio_init_pci(proxy, vdev,
584
                    PCI_VENDOR_ID_REDHAT_QUMRANET,
585
                    PCI_DEVICE_ID_VIRTIO_BLOCK,
586
                    proxy->class_code, 0x00);
587
    /* make the actual value visible */
588
    proxy->nvectors = vdev->nvectors;
589
    return 0;
590
}
591

    
592
static int virtio_exit_pci(PCIDevice *pci_dev)
593
{
594
    return msix_uninit(pci_dev);
595
}
596

    
597
static int virtio_blk_exit_pci(PCIDevice *pci_dev)
598
{
599
    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
600

    
601
    virtio_blk_exit(proxy->vdev);
602
    blockdev_mark_auto_del(proxy->block.bs);
603
    return virtio_exit_pci(pci_dev);
604
}
605

    
606
static int virtio_serial_init_pci(PCIDevice *pci_dev)
607
{
608
    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
609
    VirtIODevice *vdev;
610

    
611
    if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
612
        proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
613
        proxy->class_code != PCI_CLASS_OTHERS)          /* qemu-kvm  */
614
        proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
615

    
616
    vdev = virtio_serial_init(&pci_dev->qdev, proxy->max_virtserial_ports);
617
    if (!vdev) {
618
        return -1;
619
    }
620
    vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
621
                                        ? proxy->max_virtserial_ports + 1
622
                                        : proxy->nvectors;
623
    virtio_init_pci(proxy, vdev,
624
                    PCI_VENDOR_ID_REDHAT_QUMRANET,
625
                    PCI_DEVICE_ID_VIRTIO_CONSOLE,
626
                    proxy->class_code, 0x00);
627
    proxy->nvectors = vdev->nvectors;
628
    return 0;
629
}
630

    
631
static int virtio_serial_exit_pci(PCIDevice *pci_dev)
632
{
633
    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
634

    
635
    virtio_serial_exit(proxy->vdev);
636
    return virtio_exit_pci(pci_dev);
637
}
638

    
639
static int virtio_net_init_pci(PCIDevice *pci_dev)
640
{
641
    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
642
    VirtIODevice *vdev;
643

    
644
    vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net);
645

    
646
    vdev->nvectors = proxy->nvectors;
647
    virtio_init_pci(proxy, vdev,
648
                    PCI_VENDOR_ID_REDHAT_QUMRANET,
649
                    PCI_DEVICE_ID_VIRTIO_NET,
650
                    PCI_CLASS_NETWORK_ETHERNET,
651
                    0x00);
652

    
653
    /* make the actual value visible */
654
    proxy->nvectors = vdev->nvectors;
655
    return 0;
656
}
657

    
658
static int virtio_net_exit_pci(PCIDevice *pci_dev)
659
{
660
    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
661

    
662
    virtio_net_exit(proxy->vdev);
663
    return virtio_exit_pci(pci_dev);
664
}
665

    
666
static int virtio_balloon_init_pci(PCIDevice *pci_dev)
667
{
668
    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
669
    VirtIODevice *vdev;
670

    
671
    vdev = virtio_balloon_init(&pci_dev->qdev);
672
    virtio_init_pci(proxy, vdev,
673
                    PCI_VENDOR_ID_REDHAT_QUMRANET,
674
                    PCI_DEVICE_ID_VIRTIO_BALLOON,
675
                    PCI_CLASS_MEMORY_RAM,
676
                    0x00);
677
    return 0;
678
}
679

    
680
#ifdef CONFIG_VIRTFS
681
static int virtio_9p_init_pci(PCIDevice *pci_dev)
682
{
683
    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
684
    VirtIODevice *vdev;
685

    
686
    vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
687
    virtio_init_pci(proxy, vdev,
688
                    PCI_VENDOR_ID_REDHAT_QUMRANET,
689
                    0x1009,
690
                    0x2,
691
                    0x00);
692

    
693
    return 0;
694
}
695
#endif
696

    
697
static PCIDeviceInfo virtio_info[] = {
698
    {
699
        .qdev.name = "virtio-blk-pci",
700
        .qdev.size = sizeof(VirtIOPCIProxy),
701
        .init      = virtio_blk_init_pci,
702
        .exit      = virtio_blk_exit_pci,
703
        .qdev.props = (Property[]) {
704
            DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
705
            DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, block),
706
            DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
707
            DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
708
            DEFINE_PROP_END_OF_LIST(),
709
        },
710
        .qdev.reset = virtio_pci_reset,
711
    },{
712
        .qdev.name  = "virtio-net-pci",
713
        .qdev.size  = sizeof(VirtIOPCIProxy),
714
        .init       = virtio_net_init_pci,
715
        .exit       = virtio_net_exit_pci,
716
        .romfile    = "pxe-virtio.bin",
717
        .qdev.props = (Property[]) {
718
            DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
719
            DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
720
            DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
721
            DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy,
722
                               net.txtimer, TX_TIMER_INTERVAL),
723
            DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy,
724
                              net.txburst, TX_BURST),
725
            DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
726
            DEFINE_PROP_END_OF_LIST(),
727
        },
728
        .qdev.reset = virtio_pci_reset,
729
    },{
730
        .qdev.name = "virtio-serial-pci",
731
        .qdev.alias = "virtio-serial",
732
        .qdev.size = sizeof(VirtIOPCIProxy),
733
        .init      = virtio_serial_init_pci,
734
        .exit      = virtio_serial_exit_pci,
735
        .qdev.props = (Property[]) {
736
            DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
737
                               DEV_NVECTORS_UNSPECIFIED),
738
            DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
739
            DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
740
            DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, max_virtserial_ports,
741
                               31),
742
            DEFINE_PROP_END_OF_LIST(),
743
        },
744
        .qdev.reset = virtio_pci_reset,
745
    },{
746
        .qdev.name = "virtio-balloon-pci",
747
        .qdev.size = sizeof(VirtIOPCIProxy),
748
        .init      = virtio_balloon_init_pci,
749
        .exit      = virtio_exit_pci,
750
        .qdev.props = (Property[]) {
751
            DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
752
            DEFINE_PROP_END_OF_LIST(),
753
        },
754
        .qdev.reset = virtio_pci_reset,
755
    },{
756
#ifdef CONFIG_VIRTFS
757
        .qdev.name = "virtio-9p-pci",
758
        .qdev.size = sizeof(VirtIOPCIProxy),
759
        .init      = virtio_9p_init_pci,
760
        .qdev.props = (Property[]) {
761
            DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
762
            DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
763
            DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
764
            DEFINE_PROP_END_OF_LIST(),
765
        },
766
    }, {
767
#endif
768
        /* end of list */
769
    }
770
};
771

    
772
static void virtio_pci_register_devices(void)
773
{
774
    pci_qdev_register_many(virtio_info);
775
}
776

    
777
device_init(virtio_pci_register_devices)