Commit | Line | Data |
---|---|---|
3343660d | 1 | /* |
a90fdce9 | 2 | * Virtio PCI driver - common functionality for all device versions |
3343660d AL |
3 | * |
4 | * This module allows virtio devices to be used over a virtual PCI device. | |
5 | * This can be used with QEMU based VMMs like KVM or Xen. | |
6 | * | |
7 | * Copyright IBM Corp. 2007 | |
a90fdce9 | 8 | * Copyright Red Hat, Inc. 2014 |
3343660d AL |
9 | * |
10 | * Authors: | |
11 | * Anthony Liguori <aliguori@us.ibm.com> | |
a90fdce9 MT |
12 | * Rusty Russell <rusty@rustcorp.com.au> |
13 | * Michael S. Tsirkin <mst@redhat.com> | |
3343660d AL |
14 | * |
15 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
16 | * See the COPYING file in the top-level directory. | |
17 | * | |
18 | */ | |
19 | ||
5f4c9760 | 20 | #include "virtio_pci_common.h" |
3343660d | 21 | |
e6af578c | 22 | /* wait for pending irq handlers */ |
38eb4a29 | 23 | void vp_synchronize_vectors(struct virtio_device *vdev) |
e6af578c MT |
24 | { |
25 | struct virtio_pci_device *vp_dev = to_vp_device(vdev); | |
26 | int i; | |
27 | ||
28 | if (vp_dev->intx_enabled) | |
29 | synchronize_irq(vp_dev->pci_dev->irq); | |
30 | ||
31 | for (i = 0; i < vp_dev->msix_vectors; ++i) | |
32 | synchronize_irq(vp_dev->msix_entries[i].vector); | |
33 | } | |
34 | ||
3343660d | 35 | /* the notify function used when creating a virt queue */ |
38eb4a29 | 36 | bool vp_notify(struct virtqueue *vq) |
3343660d | 37 | { |
3343660d AL |
38 | /* we write the queue's selector into the notification register to |
39 | * signal the other end */ | |
f30eaf4a | 40 | iowrite16(vq->index, (void __iomem *)vq->priv); |
46f9c2b9 | 41 | return true; |
3343660d AL |
42 | } |
43 | ||
77cf5246 MT |
44 | /* Handle a configuration change: Tell driver if it wants to know. */ |
45 | static irqreturn_t vp_config_changed(int irq, void *opaque) | |
46 | { | |
47 | struct virtio_pci_device *vp_dev = opaque; | |
77cf5246 | 48 | |
016c98c6 | 49 | virtio_config_changed(&vp_dev->vdev); |
77cf5246 MT |
50 | return IRQ_HANDLED; |
51 | } | |
52 | ||
53 | /* Notify all virtqueues on an interrupt. */ | |
54 | static irqreturn_t vp_vring_interrupt(int irq, void *opaque) | |
55 | { | |
56 | struct virtio_pci_device *vp_dev = opaque; | |
57 | struct virtio_pci_vq_info *info; | |
58 | irqreturn_t ret = IRQ_NONE; | |
59 | unsigned long flags; | |
60 | ||
61 | spin_lock_irqsave(&vp_dev->lock, flags); | |
62 | list_for_each_entry(info, &vp_dev->virtqueues, node) { | |
63 | if (vring_interrupt(irq, info->vq) == IRQ_HANDLED) | |
64 | ret = IRQ_HANDLED; | |
65 | } | |
66 | spin_unlock_irqrestore(&vp_dev->lock, flags); | |
67 | ||
68 | return ret; | |
69 | } | |
70 | ||
3343660d AL |
71 | /* A small wrapper to also acknowledge the interrupt when it's handled. |
72 | * I really need an EIO hook for the vring so I can ack the interrupt once we | |
73 | * know that we'll be handling the IRQ but before we invoke the callback since | |
74 | * the callback may notify the host which results in the host attempting to | |
75 | * raise an interrupt that we would then mask once we acknowledged the | |
76 | * interrupt. */ | |
77 | static irqreturn_t vp_interrupt(int irq, void *opaque) | |
78 | { | |
79 | struct virtio_pci_device *vp_dev = opaque; | |
3343660d AL |
80 | u8 isr; |
81 | ||
82 | /* reading the ISR has the effect of also clearing it so it's very | |
83 | * important to save off the value. */ | |
af535722 | 84 | isr = ioread8(vp_dev->isr); |
3343660d AL |
85 | |
86 | /* It's definitely not us if the ISR was not high */ | |
87 | if (!isr) | |
88 | return IRQ_NONE; | |
89 | ||
90 | /* Configuration change? Tell driver if it wants to know. */ | |
77cf5246 MT |
91 | if (isr & VIRTIO_PCI_ISR_CONFIG) |
92 | vp_config_changed(irq, opaque); | |
3343660d | 93 | |
77cf5246 | 94 | return vp_vring_interrupt(irq, opaque); |
3343660d AL |
95 | } |
96 | ||
82af8ce8 MT |
97 | static void vp_free_vectors(struct virtio_device *vdev) |
98 | { | |
99 | struct virtio_pci_device *vp_dev = to_vp_device(vdev); | |
100 | int i; | |
101 | ||
102 | if (vp_dev->intx_enabled) { | |
103 | free_irq(vp_dev->pci_dev->irq, vp_dev); | |
104 | vp_dev->intx_enabled = 0; | |
105 | } | |
106 | ||
107 | for (i = 0; i < vp_dev->msix_used_vectors; ++i) | |
108 | free_irq(vp_dev->msix_entries[i].vector, vp_dev); | |
82af8ce8 | 109 | |
75a0a52b JW |
110 | for (i = 0; i < vp_dev->msix_vectors; i++) |
111 | if (vp_dev->msix_affinity_masks[i]) | |
112 | free_cpumask_var(vp_dev->msix_affinity_masks[i]); | |
113 | ||
82af8ce8 MT |
114 | if (vp_dev->msix_enabled) { |
115 | /* Disable the vector used for configuration */ | |
6f8f23d6 | 116 | vp_dev->config_vector(vp_dev, VIRTIO_MSI_NO_VECTOR); |
82af8ce8 | 117 | |
82af8ce8 | 118 | pci_disable_msix(vp_dev->pci_dev); |
ff52c3fc | 119 | vp_dev->msix_enabled = 0; |
82af8ce8 | 120 | } |
ff52c3fc | 121 | |
f11335db | 122 | vp_dev->msix_vectors = 0; |
ff52c3fc MT |
123 | vp_dev->msix_used_vectors = 0; |
124 | kfree(vp_dev->msix_names); | |
125 | vp_dev->msix_names = NULL; | |
126 | kfree(vp_dev->msix_entries); | |
127 | vp_dev->msix_entries = NULL; | |
75a0a52b JW |
128 | kfree(vp_dev->msix_affinity_masks); |
129 | vp_dev->msix_affinity_masks = NULL; | |
82af8ce8 MT |
130 | } |
131 | ||
f68d2408 RR |
132 | static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors, |
133 | bool per_vq_vectors) | |
82af8ce8 MT |
134 | { |
135 | struct virtio_pci_device *vp_dev = to_vp_device(vdev); | |
136 | const char *name = dev_name(&vp_dev->vdev.dev); | |
137 | unsigned i, v; | |
138 | int err = -ENOMEM; | |
e969fed5 | 139 | |
f11335db AV |
140 | vp_dev->msix_vectors = nvectors; |
141 | ||
82af8ce8 MT |
142 | vp_dev->msix_entries = kmalloc(nvectors * sizeof *vp_dev->msix_entries, |
143 | GFP_KERNEL); | |
144 | if (!vp_dev->msix_entries) | |
ff52c3fc | 145 | goto error; |
82af8ce8 MT |
146 | vp_dev->msix_names = kmalloc(nvectors * sizeof *vp_dev->msix_names, |
147 | GFP_KERNEL); | |
148 | if (!vp_dev->msix_names) | |
ff52c3fc | 149 | goto error; |
75a0a52b JW |
150 | vp_dev->msix_affinity_masks |
151 | = kzalloc(nvectors * sizeof *vp_dev->msix_affinity_masks, | |
152 | GFP_KERNEL); | |
153 | if (!vp_dev->msix_affinity_masks) | |
154 | goto error; | |
155 | for (i = 0; i < nvectors; ++i) | |
156 | if (!alloc_cpumask_var(&vp_dev->msix_affinity_masks[i], | |
157 | GFP_KERNEL)) | |
158 | goto error; | |
82af8ce8 MT |
159 | |
160 | for (i = 0; i < nvectors; ++i) | |
161 | vp_dev->msix_entries[i].entry = i; | |
162 | ||
5e37f670 AG |
163 | err = pci_enable_msix_exact(vp_dev->pci_dev, |
164 | vp_dev->msix_entries, nvectors); | |
e969fed5 MT |
165 | if (err) |
166 | goto error; | |
e969fed5 MT |
167 | vp_dev->msix_enabled = 1; |
168 | ||
169 | /* Set the vector used for configuration */ | |
170 | v = vp_dev->msix_used_vectors; | |
171 | snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names, | |
172 | "%s-config", name); | |
173 | err = request_irq(vp_dev->msix_entries[v].vector, | |
174 | vp_config_changed, 0, vp_dev->msix_names[v], | |
175 | vp_dev); | |
176 | if (err) | |
177 | goto error; | |
178 | ++vp_dev->msix_used_vectors; | |
82af8ce8 | 179 | |
6f8f23d6 | 180 | v = vp_dev->config_vector(vp_dev, v); |
e969fed5 | 181 | /* Verify we had enough resources to assign the vector */ |
e969fed5 MT |
182 | if (v == VIRTIO_MSI_NO_VECTOR) { |
183 | err = -EBUSY; | |
184 | goto error; | |
82af8ce8 MT |
185 | } |
186 | ||
e969fed5 | 187 | if (!per_vq_vectors) { |
82af8ce8 MT |
188 | /* Shared vector for all VQs */ |
189 | v = vp_dev->msix_used_vectors; | |
190 | snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names, | |
191 | "%s-virtqueues", name); | |
192 | err = request_irq(vp_dev->msix_entries[v].vector, | |
193 | vp_vring_interrupt, 0, vp_dev->msix_names[v], | |
194 | vp_dev); | |
195 | if (err) | |
ff52c3fc | 196 | goto error; |
82af8ce8 MT |
197 | ++vp_dev->msix_used_vectors; |
198 | } | |
199 | return 0; | |
ff52c3fc | 200 | error: |
82af8ce8 | 201 | vp_free_vectors(vdev); |
82af8ce8 MT |
202 | return err; |
203 | } | |
204 | ||
f68d2408 RR |
205 | static int vp_request_intx(struct virtio_device *vdev) |
206 | { | |
207 | int err; | |
208 | struct virtio_pci_device *vp_dev = to_vp_device(vdev); | |
209 | ||
210 | err = request_irq(vp_dev->pci_dev->irq, vp_interrupt, | |
211 | IRQF_SHARED, dev_name(&vdev->dev), vp_dev); | |
212 | if (!err) | |
213 | vp_dev->intx_enabled = 1; | |
214 | return err; | |
215 | } | |
216 | ||
b09f00bb MT |
217 | static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index, |
218 | void (*callback)(struct virtqueue *vq), | |
219 | const char *name, | |
220 | u16 msix_vec) | |
221 | { | |
222 | struct virtio_pci_device *vp_dev = to_vp_device(vdev); | |
223 | struct virtio_pci_vq_info *info = kmalloc(sizeof *info, GFP_KERNEL); | |
224 | struct virtqueue *vq; | |
225 | unsigned long flags; | |
226 | ||
227 | /* fill out our structure that represents an active queue */ | |
228 | if (!info) | |
229 | return ERR_PTR(-ENOMEM); | |
230 | ||
231 | vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, msix_vec); | |
232 | if (IS_ERR(vq)) | |
233 | goto out_info; | |
234 | ||
235 | info->vq = vq; | |
005b20a8 KK |
236 | if (callback) { |
237 | spin_lock_irqsave(&vp_dev->lock, flags); | |
238 | list_add(&info->node, &vp_dev->virtqueues); | |
239 | spin_unlock_irqrestore(&vp_dev->lock, flags); | |
240 | } else { | |
241 | INIT_LIST_HEAD(&info->node); | |
242 | } | |
3343660d | 243 | |
3ec7a77b | 244 | vp_dev->vqs[index] = info; |
3343660d AL |
245 | return vq; |
246 | ||
3343660d AL |
247 | out_info: |
248 | kfree(info); | |
b09f00bb | 249 | return vq; |
3343660d AL |
250 | } |
251 | ||
5386cef2 MT |
252 | static void vp_del_vq(struct virtqueue *vq) |
253 | { | |
254 | struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev); | |
255 | struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index]; | |
256 | unsigned long flags; | |
257 | ||
258 | spin_lock_irqsave(&vp_dev->lock, flags); | |
259 | list_del(&info->node); | |
260 | spin_unlock_irqrestore(&vp_dev->lock, flags); | |
261 | ||
262 | vp_dev->del_vq(info); | |
3343660d AL |
263 | kfree(info); |
264 | } | |
265 | ||
82af8ce8 | 266 | /* the config->del_vqs() implementation */ |
38eb4a29 | 267 | void vp_del_vqs(struct virtio_device *vdev) |
d2a7ddda | 268 | { |
e969fed5 | 269 | struct virtio_pci_device *vp_dev = to_vp_device(vdev); |
d2a7ddda | 270 | struct virtqueue *vq, *n; |
e969fed5 | 271 | struct virtio_pci_vq_info *info; |
d2a7ddda | 272 | |
e969fed5 | 273 | list_for_each_entry_safe(vq, n, &vdev->vqs, list) { |
3ec7a77b | 274 | info = vp_dev->vqs[vq->index]; |
31198159 MT |
275 | if (vp_dev->per_vq_vectors && |
276 | info->msix_vector != VIRTIO_MSI_NO_VECTOR) | |
f68d2408 RR |
277 | free_irq(vp_dev->msix_entries[info->msix_vector].vector, |
278 | vq); | |
d2a7ddda | 279 | vp_del_vq(vq); |
e969fed5 MT |
280 | } |
281 | vp_dev->per_vq_vectors = false; | |
82af8ce8 MT |
282 | |
283 | vp_free_vectors(vdev); | |
3ec7a77b | 284 | kfree(vp_dev->vqs); |
d2a7ddda MT |
285 | } |
286 | ||
e969fed5 MT |
287 | static int vp_try_to_find_vqs(struct virtio_device *vdev, unsigned nvqs, |
288 | struct virtqueue *vqs[], | |
289 | vq_callback_t *callbacks[], | |
290 | const char *names[], | |
f68d2408 | 291 | bool use_msix, |
e969fed5 | 292 | bool per_vq_vectors) |
d2a7ddda | 293 | { |
e969fed5 | 294 | struct virtio_pci_device *vp_dev = to_vp_device(vdev); |
f68d2408 RR |
295 | u16 msix_vec; |
296 | int i, err, nvectors, allocated_vectors; | |
82af8ce8 | 297 | |
3ec7a77b MT |
298 | vp_dev->vqs = kmalloc(nvqs * sizeof *vp_dev->vqs, GFP_KERNEL); |
299 | if (!vp_dev->vqs) | |
300 | return -ENOMEM; | |
301 | ||
f68d2408 RR |
302 | if (!use_msix) { |
303 | /* Old style: one normal interrupt for change and all vqs. */ | |
304 | err = vp_request_intx(vdev); | |
305 | if (err) | |
3ec7a77b | 306 | goto error_find; |
f68d2408 RR |
307 | } else { |
308 | if (per_vq_vectors) { | |
309 | /* Best option: one for change interrupt, one per vq. */ | |
310 | nvectors = 1; | |
311 | for (i = 0; i < nvqs; ++i) | |
312 | if (callbacks[i]) | |
313 | ++nvectors; | |
314 | } else { | |
315 | /* Second best: one for change, shared for all vqs. */ | |
316 | nvectors = 2; | |
317 | } | |
318 | ||
319 | err = vp_request_msix_vectors(vdev, nvectors, per_vq_vectors); | |
320 | if (err) | |
3ec7a77b | 321 | goto error_find; |
f68d2408 | 322 | } |
d2a7ddda | 323 | |
e969fed5 MT |
324 | vp_dev->per_vq_vectors = per_vq_vectors; |
325 | allocated_vectors = vp_dev->msix_used_vectors; | |
d2a7ddda | 326 | for (i = 0; i < nvqs; ++i) { |
6457f126 MT |
327 | if (!names[i]) { |
328 | vqs[i] = NULL; | |
329 | continue; | |
330 | } else if (!callbacks[i] || !vp_dev->msix_enabled) | |
f68d2408 | 331 | msix_vec = VIRTIO_MSI_NO_VECTOR; |
e969fed5 | 332 | else if (vp_dev->per_vq_vectors) |
f68d2408 | 333 | msix_vec = allocated_vectors++; |
e969fed5 | 334 | else |
f68d2408 | 335 | msix_vec = VP_MSIX_VQ_VECTOR; |
b09f00bb | 336 | vqs[i] = vp_setup_vq(vdev, i, callbacks[i], names[i], msix_vec); |
e969fed5 MT |
337 | if (IS_ERR(vqs[i])) { |
338 | err = PTR_ERR(vqs[i]); | |
82af8ce8 | 339 | goto error_find; |
e969fed5 | 340 | } |
0b22bd0b MT |
341 | |
342 | if (!vp_dev->per_vq_vectors || msix_vec == VIRTIO_MSI_NO_VECTOR) | |
343 | continue; | |
344 | ||
e969fed5 | 345 | /* allocate per-vq irq if available and necessary */ |
0b22bd0b MT |
346 | snprintf(vp_dev->msix_names[msix_vec], |
347 | sizeof *vp_dev->msix_names, | |
348 | "%s-%s", | |
349 | dev_name(&vp_dev->vdev.dev), names[i]); | |
350 | err = request_irq(vp_dev->msix_entries[msix_vec].vector, | |
351 | vring_interrupt, 0, | |
352 | vp_dev->msix_names[msix_vec], | |
353 | vqs[i]); | |
354 | if (err) { | |
355 | vp_del_vq(vqs[i]); | |
356 | goto error_find; | |
e969fed5 | 357 | } |
d2a7ddda MT |
358 | } |
359 | return 0; | |
360 | ||
82af8ce8 | 361 | error_find: |
d2a7ddda | 362 | vp_del_vqs(vdev); |
e969fed5 MT |
363 | return err; |
364 | } | |
365 | ||
366 | /* the config->find_vqs() implementation */ | |
38eb4a29 MT |
367 | int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs, |
368 | struct virtqueue *vqs[], | |
369 | vq_callback_t *callbacks[], | |
370 | const char *names[]) | |
e969fed5 | 371 | { |
f68d2408 | 372 | int err; |
e969fed5 | 373 | |
f68d2408 RR |
374 | /* Try MSI-X with one vector per queue. */ |
375 | err = vp_try_to_find_vqs(vdev, nvqs, vqs, callbacks, names, true, true); | |
e969fed5 MT |
376 | if (!err) |
377 | return 0; | |
f68d2408 | 378 | /* Fallback: MSI-X with one vector for config, one shared for queues. */ |
e969fed5 | 379 | err = vp_try_to_find_vqs(vdev, nvqs, vqs, callbacks, names, |
f68d2408 | 380 | true, false); |
e969fed5 MT |
381 | if (!err) |
382 | return 0; | |
383 | /* Finally fall back to regular interrupts. */ | |
f68d2408 RR |
384 | return vp_try_to_find_vqs(vdev, nvqs, vqs, callbacks, names, |
385 | false, false); | |
d2a7ddda MT |
386 | } |
387 | ||
38eb4a29 | 388 | const char *vp_bus_name(struct virtio_device *vdev) |
66846048 RJ |
389 | { |
390 | struct virtio_pci_device *vp_dev = to_vp_device(vdev); | |
391 | ||
392 | return pci_name(vp_dev->pci_dev); | |
393 | } | |
394 | ||
75a0a52b JW |
395 | /* Setup the affinity for a virtqueue: |
396 | * - force the affinity for per vq vector | |
397 | * - OR over all affinities for shared MSI | |
398 | * - ignore the affinity request if we're using INTX | |
399 | */ | |
38eb4a29 | 400 | int vp_set_vq_affinity(struct virtqueue *vq, int cpu) |
75a0a52b JW |
401 | { |
402 | struct virtio_device *vdev = vq->vdev; | |
403 | struct virtio_pci_device *vp_dev = to_vp_device(vdev); | |
3ec7a77b | 404 | struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index]; |
75a0a52b JW |
405 | struct cpumask *mask; |
406 | unsigned int irq; | |
407 | ||
408 | if (!vq->callback) | |
409 | return -EINVAL; | |
410 | ||
411 | if (vp_dev->msix_enabled) { | |
412 | mask = vp_dev->msix_affinity_masks[info->msix_vector]; | |
413 | irq = vp_dev->msix_entries[info->msix_vector].vector; | |
414 | if (cpu == -1) | |
415 | irq_set_affinity_hint(irq, NULL); | |
416 | else { | |
417 | cpumask_set_cpu(cpu, mask); | |
418 | irq_set_affinity_hint(irq, mask); | |
419 | } | |
420 | } | |
421 | return 0; | |
422 | } | |
423 | ||
38eb4a29 | 424 | void virtio_pci_release_dev(struct device *_d) |
29f9f12e | 425 | { |
72103bd1 MT |
426 | /* |
427 | * No need for a release method as we allocate/free | |
428 | * all devices together with the pci devices. | |
429 | * Provide an empty one to avoid getting a warning from core. | |
430 | */ | |
29f9f12e MM |
431 | } |
432 | ||
9e266ece | 433 | #ifdef CONFIG_PM_SLEEP |
f0fe6f11 AS |
434 | static int virtio_pci_freeze(struct device *dev) |
435 | { | |
436 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
437 | struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev); | |
f0fe6f11 AS |
438 | int ret; |
439 | ||
c6716bae | 440 | ret = virtio_device_freeze(&vp_dev->vdev); |
f0fe6f11 AS |
441 | |
442 | if (!ret) | |
443 | pci_disable_device(pci_dev); | |
444 | return ret; | |
445 | } | |
446 | ||
0517fdd1 | 447 | static int virtio_pci_restore(struct device *dev) |
f0fe6f11 AS |
448 | { |
449 | struct pci_dev *pci_dev = to_pci_dev(dev); | |
450 | struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev); | |
451 | int ret; | |
452 | ||
453 | ret = pci_enable_device(pci_dev); | |
454 | if (ret) | |
455 | return ret; | |
0517fdd1 | 456 | |
f0fe6f11 | 457 | pci_set_master(pci_dev); |
c6716bae | 458 | return virtio_device_restore(&vp_dev->vdev); |
f0fe6f11 AS |
459 | } |
460 | ||
9a4253db | 461 | static const struct dev_pm_ops virtio_pci_pm_ops = { |
f878d0be | 462 | SET_SYSTEM_SLEEP_PM_OPS(virtio_pci_freeze, virtio_pci_restore) |
d0775363 | 463 | }; |
3343660d | 464 | #endif |
9a4253db MT |
465 | |
466 | ||
467 | /* Qumranet donated their vendor ID for devices 0x1000 thru 0x10FF. */ | |
468 | static const struct pci_device_id virtio_pci_id_table[] = { | |
469 | { PCI_DEVICE(0x1af4, PCI_ANY_ID) }, | |
470 | { 0 } | |
471 | }; | |
472 | ||
473 | MODULE_DEVICE_TABLE(pci, virtio_pci_id_table); | |
474 | ||
475 | static int virtio_pci_probe(struct pci_dev *pci_dev, | |
476 | const struct pci_device_id *id) | |
477 | { | |
478 | return virtio_pci_legacy_probe(pci_dev, id); | |
479 | } | |
480 | ||
481 | static void virtio_pci_remove(struct pci_dev *pci_dev) | |
482 | { | |
483 | virtio_pci_legacy_remove(pci_dev); | |
484 | } | |
485 | ||
486 | static struct pci_driver virtio_pci_driver = { | |
487 | .name = "virtio-pci", | |
488 | .id_table = virtio_pci_id_table, | |
489 | .probe = virtio_pci_probe, | |
490 | .remove = virtio_pci_remove, | |
491 | #ifdef CONFIG_PM_SLEEP | |
492 | .driver.pm = &virtio_pci_pm_ops, | |
493 | #endif | |
494 | }; | |
495 | ||
496 | module_pci_driver(virtio_pci_driver); | |
5ff16110 HX |
497 | |
498 | MODULE_AUTHOR("Anthony Liguori <aliguori@us.ibm.com>"); | |
499 | MODULE_DESCRIPTION("virtio-pci"); | |
500 | MODULE_LICENSE("GPL"); | |
501 | MODULE_VERSION("1"); |