1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Virtio PCI driver - common functionality for all device versions
4 *
5 * This module allows virtio devices to be used over a virtual PCI device.
6 * This can be used with QEMU based VMMs like KVM or Xen.
7 *
8 * Copyright IBM Corp. 2007
9 * Copyright Red Hat, Inc. 2014
10 *
11 * Authors:
12 * Anthony Liguori <aliguori@us.ibm.com>
13 * Rusty Russell <rusty@rustcorp.com.au>
14 * Michael S. Tsirkin <mst@redhat.com>
15 */
16
17 #include "virtio_pci_common.h"
18
19 static bool force_legacy = false;
20
21 #if IS_ENABLED(CONFIG_VIRTIO_PCI_LEGACY)
22 module_param(force_legacy, bool, 0444);
23 MODULE_PARM_DESC(force_legacy,
24 "Force legacy mode for transitional virtio 1 devices");
25 #endif
26
27 /* wait for pending irq handlers */
vp_synchronize_vectors(struct virtio_device * vdev)28 void vp_synchronize_vectors(struct virtio_device *vdev)
29 {
30 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
31 int i;
32
33 if (vp_dev->intx_enabled)
34 synchronize_irq(vp_dev->pci_dev->irq);
35
36 for (i = 0; i < vp_dev->msix_vectors; ++i)
37 synchronize_irq(pci_irq_vector(vp_dev->pci_dev, i));
38 }
39
40 /* the notify function used when creating a virt queue */
vp_notify(struct virtqueue * vq)41 bool vp_notify(struct virtqueue *vq)
42 {
43 /* we write the queue's selector into the notification register to
44 * signal the other end */
45 iowrite16(vq->index, (void __iomem *)vq->priv);
46 return true;
47 }
48
49 /* Handle a configuration change: Tell driver if it wants to know. */
vp_config_changed(int irq,void * opaque)50 static irqreturn_t vp_config_changed(int irq, void *opaque)
51 {
52 struct virtio_pci_device *vp_dev = opaque;
53
54 virtio_config_changed(&vp_dev->vdev);
55 return IRQ_HANDLED;
56 }
57
58 /* Notify all virtqueues on an interrupt. */
vp_vring_interrupt(int irq,void * opaque)59 static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
60 {
61 struct virtio_pci_device *vp_dev = opaque;
62 struct virtio_pci_vq_info *info;
63 irqreturn_t ret = IRQ_NONE;
64 unsigned long flags;
65
66 spin_lock_irqsave(&vp_dev->lock, flags);
67 list_for_each_entry(info, &vp_dev->virtqueues, node) {
68 if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
69 ret = IRQ_HANDLED;
70 }
71 spin_unlock_irqrestore(&vp_dev->lock, flags);
72
73 return ret;
74 }
75
76 /* A small wrapper to also acknowledge the interrupt when it's handled.
77 * I really need an EIO hook for the vring so I can ack the interrupt once we
78 * know that we'll be handling the IRQ but before we invoke the callback since
79 * the callback may notify the host which results in the host attempting to
80 * raise an interrupt that we would then mask once we acknowledged the
81 * interrupt. */
vp_interrupt(int irq,void * opaque)82 static irqreturn_t vp_interrupt(int irq, void *opaque)
83 {
84 struct virtio_pci_device *vp_dev = opaque;
85 u8 isr;
86
87 /* reading the ISR has the effect of also clearing it so it's very
88 * important to save off the value. */
89 isr = ioread8(vp_dev->isr);
90
91 /* It's definitely not us if the ISR was not high */
92 if (!isr)
93 return IRQ_NONE;
94
95 /* Configuration change? Tell driver if it wants to know. */
96 if (isr & VIRTIO_PCI_ISR_CONFIG)
97 vp_config_changed(irq, opaque);
98
99 return vp_vring_interrupt(irq, opaque);
100 }
101
vp_request_msix_vectors(struct virtio_device * vdev,int nvectors,bool per_vq_vectors,struct irq_affinity * desc)102 static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors,
103 bool per_vq_vectors, struct irq_affinity *desc)
104 {
105 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
106 const char *name = dev_name(&vp_dev->vdev.dev);
107 unsigned int flags = PCI_IRQ_MSIX;
108 unsigned int i, v;
109 int err = -ENOMEM;
110
111 vp_dev->msix_vectors = nvectors;
112
113 vp_dev->msix_names = kmalloc_array(nvectors,
114 sizeof(*vp_dev->msix_names),
115 GFP_KERNEL);
116 if (!vp_dev->msix_names)
117 goto error;
118 vp_dev->msix_affinity_masks
119 = kcalloc(nvectors, sizeof(*vp_dev->msix_affinity_masks),
120 GFP_KERNEL);
121 if (!vp_dev->msix_affinity_masks)
122 goto error;
123 for (i = 0; i < nvectors; ++i)
124 if (!alloc_cpumask_var(&vp_dev->msix_affinity_masks[i],
125 GFP_KERNEL))
126 goto error;
127
128 if (desc) {
129 flags |= PCI_IRQ_AFFINITY;
130 desc->pre_vectors++; /* virtio config vector */
131 }
132
133 err = pci_alloc_irq_vectors_affinity(vp_dev->pci_dev, nvectors,
134 nvectors, flags, desc);
135 if (err < 0)
136 goto error;
137 vp_dev->msix_enabled = 1;
138
139 /* Set the vector used for configuration */
140 v = vp_dev->msix_used_vectors;
141 snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names,
142 "%s-config", name);
143 err = request_irq(pci_irq_vector(vp_dev->pci_dev, v),
144 vp_config_changed, 0, vp_dev->msix_names[v],
145 vp_dev);
146 if (err)
147 goto error;
148 ++vp_dev->msix_used_vectors;
149
150 v = vp_dev->config_vector(vp_dev, v);
151 /* Verify we had enough resources to assign the vector */
152 if (v == VIRTIO_MSI_NO_VECTOR) {
153 err = -EBUSY;
154 goto error;
155 }
156
157 if (!per_vq_vectors) {
158 /* Shared vector for all VQs */
159 v = vp_dev->msix_used_vectors;
160 snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names,
161 "%s-virtqueues", name);
162 err = request_irq(pci_irq_vector(vp_dev->pci_dev, v),
163 vp_vring_interrupt, 0, vp_dev->msix_names[v],
164 vp_dev);
165 if (err)
166 goto error;
167 ++vp_dev->msix_used_vectors;
168 }
169 return 0;
170 error:
171 return err;
172 }
173
vp_setup_vq(struct virtio_device * vdev,unsigned int index,void (* callback)(struct virtqueue * vq),const char * name,bool ctx,u16 msix_vec)174 static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned int index,
175 void (*callback)(struct virtqueue *vq),
176 const char *name,
177 bool ctx,
178 u16 msix_vec)
179 {
180 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
181 struct virtio_pci_vq_info *info = kmalloc(sizeof *info, GFP_KERNEL);
182 struct virtqueue *vq;
183 unsigned long flags;
184
185 /* fill out our structure that represents an active queue */
186 if (!info)
187 return ERR_PTR(-ENOMEM);
188
189 vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, ctx,
190 msix_vec);
191 if (IS_ERR(vq))
192 goto out_info;
193
194 info->vq = vq;
195 if (callback) {
196 spin_lock_irqsave(&vp_dev->lock, flags);
197 list_add(&info->node, &vp_dev->virtqueues);
198 spin_unlock_irqrestore(&vp_dev->lock, flags);
199 } else {
200 INIT_LIST_HEAD(&info->node);
201 }
202
203 vp_dev->vqs[index] = info;
204 return vq;
205
206 out_info:
207 kfree(info);
208 return vq;
209 }
210
vp_del_vq(struct virtqueue * vq)211 static void vp_del_vq(struct virtqueue *vq)
212 {
213 struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
214 struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index];
215 unsigned long flags;
216
217 spin_lock_irqsave(&vp_dev->lock, flags);
218 list_del(&info->node);
219 spin_unlock_irqrestore(&vp_dev->lock, flags);
220
221 vp_dev->del_vq(info);
222 kfree(info);
223 }
224
225 /* the config->del_vqs() implementation */
vp_del_vqs(struct virtio_device * vdev)226 void vp_del_vqs(struct virtio_device *vdev)
227 {
228 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
229 struct virtqueue *vq, *n;
230 int i;
231
232 list_for_each_entry_safe(vq, n, &vdev->vqs, list) {
233 if (vp_dev->per_vq_vectors) {
234 int v = vp_dev->vqs[vq->index]->msix_vector;
235
236 if (v != VIRTIO_MSI_NO_VECTOR) {
237 int irq = pci_irq_vector(vp_dev->pci_dev, v);
238
239 irq_set_affinity_hint(irq, NULL);
240 free_irq(irq, vq);
241 }
242 }
243 vp_del_vq(vq);
244 }
245 vp_dev->per_vq_vectors = false;
246
247 if (vp_dev->intx_enabled) {
248 free_irq(vp_dev->pci_dev->irq, vp_dev);
249 vp_dev->intx_enabled = 0;
250 }
251
252 for (i = 0; i < vp_dev->msix_used_vectors; ++i)
253 free_irq(pci_irq_vector(vp_dev->pci_dev, i), vp_dev);
254
255 if (vp_dev->msix_affinity_masks) {
256 for (i = 0; i < vp_dev->msix_vectors; i++)
257 free_cpumask_var(vp_dev->msix_affinity_masks[i]);
258 }
259
260 if (vp_dev->msix_enabled) {
261 /* Disable the vector used for configuration */
262 vp_dev->config_vector(vp_dev, VIRTIO_MSI_NO_VECTOR);
263
264 pci_free_irq_vectors(vp_dev->pci_dev);
265 vp_dev->msix_enabled = 0;
266 }
267
268 vp_dev->msix_vectors = 0;
269 vp_dev->msix_used_vectors = 0;
270 kfree(vp_dev->msix_names);
271 vp_dev->msix_names = NULL;
272 kfree(vp_dev->msix_affinity_masks);
273 vp_dev->msix_affinity_masks = NULL;
274 kfree(vp_dev->vqs);
275 vp_dev->vqs = NULL;
276 }
277
vp_find_vqs_msix(struct virtio_device * vdev,unsigned int nvqs,struct virtqueue * vqs[],vq_callback_t * callbacks[],const char * const names[],bool per_vq_vectors,const bool * ctx,struct irq_affinity * desc)278 static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned int nvqs,
279 struct virtqueue *vqs[], vq_callback_t *callbacks[],
280 const char * const names[], bool per_vq_vectors,
281 const bool *ctx,
282 struct irq_affinity *desc)
283 {
284 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
285 u16 msix_vec;
286 int i, err, nvectors, allocated_vectors, queue_idx = 0;
287
288 vp_dev->vqs = kcalloc(nvqs, sizeof(*vp_dev->vqs), GFP_KERNEL);
289 if (!vp_dev->vqs)
290 return -ENOMEM;
291
292 if (per_vq_vectors) {
293 /* Best option: one for change interrupt, one per vq. */
294 nvectors = 1;
295 for (i = 0; i < nvqs; ++i)
296 if (names[i] && callbacks[i])
297 ++nvectors;
298 } else {
299 /* Second best: one for change, shared for all vqs. */
300 nvectors = 2;
301 }
302
303 err = vp_request_msix_vectors(vdev, nvectors, per_vq_vectors,
304 per_vq_vectors ? desc : NULL);
305 if (err)
306 goto error_find;
307
308 vp_dev->per_vq_vectors = per_vq_vectors;
309 allocated_vectors = vp_dev->msix_used_vectors;
310 for (i = 0; i < nvqs; ++i) {
311 if (!names[i]) {
312 vqs[i] = NULL;
313 continue;
314 }
315
316 if (!callbacks[i])
317 msix_vec = VIRTIO_MSI_NO_VECTOR;
318 else if (vp_dev->per_vq_vectors)
319 msix_vec = allocated_vectors++;
320 else
321 msix_vec = VP_MSIX_VQ_VECTOR;
322 vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
323 ctx ? ctx[i] : false,
324 msix_vec);
325 if (IS_ERR(vqs[i])) {
326 err = PTR_ERR(vqs[i]);
327 goto error_find;
328 }
329
330 if (!vp_dev->per_vq_vectors || msix_vec == VIRTIO_MSI_NO_VECTOR)
331 continue;
332
333 /* allocate per-vq irq if available and necessary */
334 snprintf(vp_dev->msix_names[msix_vec],
335 sizeof *vp_dev->msix_names,
336 "%s-%s",
337 dev_name(&vp_dev->vdev.dev), names[i]);
338 err = request_irq(pci_irq_vector(vp_dev->pci_dev, msix_vec),
339 vring_interrupt, 0,
340 vp_dev->msix_names[msix_vec],
341 vqs[i]);
342 if (err)
343 goto error_find;
344 }
345 return 0;
346
347 error_find:
348 vp_del_vqs(vdev);
349 return err;
350 }
351
vp_find_vqs_intx(struct virtio_device * vdev,unsigned int nvqs,struct virtqueue * vqs[],vq_callback_t * callbacks[],const char * const names[],const bool * ctx)352 static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned int nvqs,
353 struct virtqueue *vqs[], vq_callback_t *callbacks[],
354 const char * const names[], const bool *ctx)
355 {
356 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
357 int i, err, queue_idx = 0;
358
359 vp_dev->vqs = kcalloc(nvqs, sizeof(*vp_dev->vqs), GFP_KERNEL);
360 if (!vp_dev->vqs)
361 return -ENOMEM;
362
363 err = request_irq(vp_dev->pci_dev->irq, vp_interrupt, IRQF_SHARED,
364 dev_name(&vdev->dev), vp_dev);
365 if (err)
366 goto out_del_vqs;
367
368 vp_dev->intx_enabled = 1;
369 vp_dev->per_vq_vectors = false;
370 for (i = 0; i < nvqs; ++i) {
371 if (!names[i]) {
372 vqs[i] = NULL;
373 continue;
374 }
375 vqs[i] = vp_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
376 ctx ? ctx[i] : false,
377 VIRTIO_MSI_NO_VECTOR);
378 if (IS_ERR(vqs[i])) {
379 err = PTR_ERR(vqs[i]);
380 goto out_del_vqs;
381 }
382 }
383
384 return 0;
385 out_del_vqs:
386 vp_del_vqs(vdev);
387 return err;
388 }
389
390 /* the config->find_vqs() implementation */
vp_find_vqs(struct virtio_device * vdev,unsigned int nvqs,struct virtqueue * vqs[],vq_callback_t * callbacks[],const char * const names[],const bool * ctx,struct irq_affinity * desc)391 int vp_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
392 struct virtqueue *vqs[], vq_callback_t *callbacks[],
393 const char * const names[], const bool *ctx,
394 struct irq_affinity *desc)
395 {
396 int err;
397
398 /* Try MSI-X with one vector per queue. */
399 err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, true, ctx, desc);
400 if (!err)
401 return 0;
402 /* Fallback: MSI-X with one vector for config, one shared for queues. */
403 err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, false, ctx, desc);
404 if (!err)
405 return 0;
406 /* Finally fall back to regular interrupts. */
407 return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names, ctx);
408 }
409
vp_bus_name(struct virtio_device * vdev)410 const char *vp_bus_name(struct virtio_device *vdev)
411 {
412 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
413
414 return pci_name(vp_dev->pci_dev);
415 }
416
417 /* Setup the affinity for a virtqueue:
418 * - force the affinity for per vq vector
419 * - OR over all affinities for shared MSI
420 * - ignore the affinity request if we're using INTX
421 */
vp_set_vq_affinity(struct virtqueue * vq,const struct cpumask * cpu_mask)422 int vp_set_vq_affinity(struct virtqueue *vq, const struct cpumask *cpu_mask)
423 {
424 struct virtio_device *vdev = vq->vdev;
425 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
426 struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index];
427 struct cpumask *mask;
428 unsigned int irq;
429
430 if (!vq->callback)
431 return -EINVAL;
432
433 if (vp_dev->msix_enabled) {
434 mask = vp_dev->msix_affinity_masks[info->msix_vector];
435 irq = pci_irq_vector(vp_dev->pci_dev, info->msix_vector);
436 if (!cpu_mask)
437 irq_set_affinity_hint(irq, NULL);
438 else {
439 cpumask_copy(mask, cpu_mask);
440 irq_set_affinity_hint(irq, mask);
441 }
442 }
443 return 0;
444 }
445
vp_get_vq_affinity(struct virtio_device * vdev,int index)446 const struct cpumask *vp_get_vq_affinity(struct virtio_device *vdev, int index)
447 {
448 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
449
450 if (!vp_dev->per_vq_vectors ||
451 vp_dev->vqs[index]->msix_vector == VIRTIO_MSI_NO_VECTOR)
452 return NULL;
453
454 return pci_irq_get_affinity(vp_dev->pci_dev,
455 vp_dev->vqs[index]->msix_vector);
456 }
457
458 #ifdef CONFIG_PM_SLEEP
virtio_pci_freeze(struct device * dev)459 static int virtio_pci_freeze(struct device *dev)
460 {
461 struct pci_dev *pci_dev = to_pci_dev(dev);
462 struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev);
463 int ret;
464
465 ret = virtio_device_freeze(&vp_dev->vdev);
466
467 if (!ret)
468 pci_disable_device(pci_dev);
469 return ret;
470 }
471
virtio_pci_restore(struct device * dev)472 static int virtio_pci_restore(struct device *dev)
473 {
474 struct pci_dev *pci_dev = to_pci_dev(dev);
475 struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev);
476 int ret;
477
478 ret = pci_enable_device(pci_dev);
479 if (ret)
480 return ret;
481
482 pci_set_master(pci_dev);
483 return virtio_device_restore(&vp_dev->vdev);
484 }
485
486 static const struct dev_pm_ops virtio_pci_pm_ops = {
487 SET_SYSTEM_SLEEP_PM_OPS(virtio_pci_freeze, virtio_pci_restore)
488 };
489 #endif
490
491
492 /* Qumranet donated their vendor ID for devices 0x1000 thru 0x10FF. */
493 static const struct pci_device_id virtio_pci_id_table[] = {
494 { PCI_DEVICE(PCI_VENDOR_ID_REDHAT_QUMRANET, PCI_ANY_ID) },
495 { 0 }
496 };
497
498 MODULE_DEVICE_TABLE(pci, virtio_pci_id_table);
499
virtio_pci_release_dev(struct device * _d)500 static void virtio_pci_release_dev(struct device *_d)
501 {
502 struct virtio_device *vdev = dev_to_virtio(_d);
503 struct virtio_pci_device *vp_dev = to_vp_device(vdev);
504
505 /* As struct device is a kobject, it's not safe to
506 * free the memory (including the reference counter itself)
507 * until it's release callback. */
508 kfree(vp_dev);
509 }
510
virtio_pci_probe(struct pci_dev * pci_dev,const struct pci_device_id * id)511 static int virtio_pci_probe(struct pci_dev *pci_dev,
512 const struct pci_device_id *id)
513 {
514 struct virtio_pci_device *vp_dev, *reg_dev = NULL;
515 int rc;
516
517 /* allocate our structure and fill it out */
518 vp_dev = kzalloc(sizeof(struct virtio_pci_device), GFP_KERNEL);
519 if (!vp_dev)
520 return -ENOMEM;
521
522 pci_set_drvdata(pci_dev, vp_dev);
523 vp_dev->vdev.dev.parent = &pci_dev->dev;
524 vp_dev->vdev.dev.release = virtio_pci_release_dev;
525 vp_dev->pci_dev = pci_dev;
526 INIT_LIST_HEAD(&vp_dev->virtqueues);
527 spin_lock_init(&vp_dev->lock);
528
529 /* enable the device */
530 rc = pci_enable_device(pci_dev);
531 if (rc)
532 goto err_enable_device;
533
534 if (force_legacy) {
535 rc = virtio_pci_legacy_probe(vp_dev);
536 /* Also try modern mode if we can't map BAR0 (no IO space). */
537 if (rc == -ENODEV || rc == -ENOMEM)
538 rc = virtio_pci_modern_probe(vp_dev);
539 if (rc)
540 goto err_probe;
541 } else {
542 rc = virtio_pci_modern_probe(vp_dev);
543 if (rc == -ENODEV)
544 rc = virtio_pci_legacy_probe(vp_dev);
545 if (rc)
546 goto err_probe;
547 }
548
549 pci_set_master(pci_dev);
550
551 vp_dev->is_legacy = vp_dev->ldev.ioaddr ? true : false;
552
553 rc = register_virtio_device(&vp_dev->vdev);
554 reg_dev = vp_dev;
555 if (rc)
556 goto err_register;
557
558 return 0;
559
560 err_register:
561 if (vp_dev->is_legacy)
562 virtio_pci_legacy_remove(vp_dev);
563 else
564 virtio_pci_modern_remove(vp_dev);
565 err_probe:
566 pci_disable_device(pci_dev);
567 err_enable_device:
568 if (reg_dev)
569 put_device(&vp_dev->vdev.dev);
570 else
571 kfree(vp_dev);
572 return rc;
573 }
574
virtio_pci_remove(struct pci_dev * pci_dev)575 static void virtio_pci_remove(struct pci_dev *pci_dev)
576 {
577 struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev);
578 struct device *dev = get_device(&vp_dev->vdev.dev);
579
580 /*
581 * Device is marked broken on surprise removal so that virtio upper
582 * layers can abort any ongoing operation.
583 */
584 if (!pci_device_is_present(pci_dev))
585 virtio_break_device(&vp_dev->vdev);
586
587 pci_disable_sriov(pci_dev);
588
589 unregister_virtio_device(&vp_dev->vdev);
590
591 if (vp_dev->is_legacy)
592 virtio_pci_legacy_remove(vp_dev);
593 else
594 virtio_pci_modern_remove(vp_dev);
595
596 pci_disable_device(pci_dev);
597 put_device(dev);
598 }
599
virtio_pci_sriov_configure(struct pci_dev * pci_dev,int num_vfs)600 static int virtio_pci_sriov_configure(struct pci_dev *pci_dev, int num_vfs)
601 {
602 struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev);
603 struct virtio_device *vdev = &vp_dev->vdev;
604 int ret;
605
606 if (!(vdev->config->get_status(vdev) & VIRTIO_CONFIG_S_DRIVER_OK))
607 return -EBUSY;
608
609 if (!__virtio_test_bit(vdev, VIRTIO_F_SR_IOV))
610 return -EINVAL;
611
612 if (pci_vfs_assigned(pci_dev))
613 return -EPERM;
614
615 if (num_vfs == 0) {
616 pci_disable_sriov(pci_dev);
617 return 0;
618 }
619
620 ret = pci_enable_sriov(pci_dev, num_vfs);
621 if (ret < 0)
622 return ret;
623
624 return num_vfs;
625 }
626
627 static struct pci_driver virtio_pci_driver = {
628 .name = "virtio-pci",
629 .id_table = virtio_pci_id_table,
630 .probe = virtio_pci_probe,
631 .remove = virtio_pci_remove,
632 #ifdef CONFIG_PM_SLEEP
633 .driver.pm = &virtio_pci_pm_ops,
634 #endif
635 .sriov_configure = virtio_pci_sriov_configure,
636 };
637
638 module_pci_driver(virtio_pci_driver);
639
640 MODULE_AUTHOR("Anthony Liguori <aliguori@us.ibm.com>");
641 MODULE_DESCRIPTION("virtio-pci");
642 MODULE_LICENSE("GPL");
643 MODULE_VERSION("1");
644