Commit | Line | Data |
---|---|---|
30edc14b KRW |
1 | /* |
2 | * PCI Stub Driver - Grabs devices in backend to be exported later | |
3 | * | |
4 | * Ryan Wilson <hap9@epoch.ncsc.mil> | |
5 | * Chris Bookholt <hap10@epoch.ncsc.mil> | |
6 | */ | |
7 | #include <linux/module.h> | |
8 | #include <linux/init.h> | |
9 | #include <linux/rwsem.h> | |
10 | #include <linux/list.h> | |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/kref.h> | |
13 | #include <linux/pci.h> | |
14 | #include <linux/wait.h> | |
15 | #include <linux/sched.h> | |
8bfd4e02 | 16 | #include <linux/atomic.h> |
30edc14b KRW |
17 | #include <xen/events.h> |
18 | #include <asm/xen/pci.h> | |
19 | #include <asm/xen/hypervisor.h> | |
20 | #include "pciback.h" | |
21 | #include "conf_space.h" | |
22 | #include "conf_space_quirks.h" | |
23 | ||
24 | static char *pci_devs_to_hide; | |
a92336a1 KRW |
25 | wait_queue_head_t xen_pcibk_aer_wait_queue; |
26 | /*Add sem for sync AER handling and xen_pcibk remove/reconfigue ops, | |
27 | * We want to avoid in middle of AER ops, xen_pcibk devices is being removed | |
30edc14b KRW |
28 | */ |
29 | static DECLARE_RWSEM(pcistub_sem); | |
30 | module_param_named(hide, pci_devs_to_hide, charp, 0444); | |
31 | ||
32 | struct pcistub_device_id { | |
33 | struct list_head slot_list; | |
34 | int domain; | |
35 | unsigned char bus; | |
36 | unsigned int devfn; | |
37 | }; | |
38 | static LIST_HEAD(pcistub_device_ids); | |
39 | static DEFINE_SPINLOCK(device_ids_lock); | |
40 | ||
41 | struct pcistub_device { | |
42 | struct kref kref; | |
43 | struct list_head dev_list; | |
44 | spinlock_t lock; | |
45 | ||
46 | struct pci_dev *dev; | |
a92336a1 | 47 | struct xen_pcibk_device *pdev;/* non-NULL if struct pci_dev is in use */ |
30edc14b KRW |
48 | }; |
49 | ||
50 | /* Access to pcistub_devices & seized_devices lists and the initialize_devices | |
51 | * flag must be locked with pcistub_devices_lock | |
52 | */ | |
53 | static DEFINE_SPINLOCK(pcistub_devices_lock); | |
54 | static LIST_HEAD(pcistub_devices); | |
55 | ||
56 | /* wait for device_initcall before initializing our devices | |
57 | * (see pcistub_init_devices_late) | |
58 | */ | |
59 | static int initialize_devices; | |
60 | static LIST_HEAD(seized_devices); | |
61 | ||
62 | static struct pcistub_device *pcistub_device_alloc(struct pci_dev *dev) | |
63 | { | |
64 | struct pcistub_device *psdev; | |
65 | ||
66 | dev_dbg(&dev->dev, "pcistub_device_alloc\n"); | |
67 | ||
68 | psdev = kzalloc(sizeof(*psdev), GFP_ATOMIC); | |
69 | if (!psdev) | |
70 | return NULL; | |
71 | ||
72 | psdev->dev = pci_dev_get(dev); | |
73 | if (!psdev->dev) { | |
74 | kfree(psdev); | |
75 | return NULL; | |
76 | } | |
77 | ||
78 | kref_init(&psdev->kref); | |
79 | spin_lock_init(&psdev->lock); | |
80 | ||
81 | return psdev; | |
82 | } | |
83 | ||
84 | /* Don't call this directly as it's called by pcistub_device_put */ | |
85 | static void pcistub_device_release(struct kref *kref) | |
86 | { | |
87 | struct pcistub_device *psdev; | |
88 | ||
89 | psdev = container_of(kref, struct pcistub_device, kref); | |
90 | ||
91 | dev_dbg(&psdev->dev->dev, "pcistub_device_release\n"); | |
92 | ||
6221a9b2 KRW |
93 | xen_unregister_device_domain_owner(psdev->dev); |
94 | ||
30edc14b | 95 | /* Clean-up the device */ |
a92336a1 KRW |
96 | xen_pcibk_reset_device(psdev->dev); |
97 | xen_pcibk_config_free_dyn_fields(psdev->dev); | |
98 | xen_pcibk_config_free_dev(psdev->dev); | |
30edc14b KRW |
99 | kfree(pci_get_drvdata(psdev->dev)); |
100 | pci_set_drvdata(psdev->dev, NULL); | |
101 | ||
97309d39 | 102 | psdev->dev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED; |
30edc14b KRW |
103 | pci_dev_put(psdev->dev); |
104 | ||
105 | kfree(psdev); | |
106 | } | |
107 | ||
108 | static inline void pcistub_device_get(struct pcistub_device *psdev) | |
109 | { | |
110 | kref_get(&psdev->kref); | |
111 | } | |
112 | ||
113 | static inline void pcistub_device_put(struct pcistub_device *psdev) | |
114 | { | |
115 | kref_put(&psdev->kref, pcistub_device_release); | |
116 | } | |
117 | ||
118 | static struct pcistub_device *pcistub_device_find(int domain, int bus, | |
119 | int slot, int func) | |
120 | { | |
121 | struct pcistub_device *psdev = NULL; | |
122 | unsigned long flags; | |
123 | ||
124 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
125 | ||
126 | list_for_each_entry(psdev, &pcistub_devices, dev_list) { | |
127 | if (psdev->dev != NULL | |
128 | && domain == pci_domain_nr(psdev->dev->bus) | |
129 | && bus == psdev->dev->bus->number | |
130 | && PCI_DEVFN(slot, func) == psdev->dev->devfn) { | |
131 | pcistub_device_get(psdev); | |
132 | goto out; | |
133 | } | |
134 | } | |
135 | ||
136 | /* didn't find it */ | |
137 | psdev = NULL; | |
138 | ||
139 | out: | |
140 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
141 | return psdev; | |
142 | } | |
143 | ||
a92336a1 | 144 | static struct pci_dev *pcistub_device_get_pci_dev(struct xen_pcibk_device *pdev, |
30edc14b KRW |
145 | struct pcistub_device *psdev) |
146 | { | |
147 | struct pci_dev *pci_dev = NULL; | |
148 | unsigned long flags; | |
149 | ||
150 | pcistub_device_get(psdev); | |
151 | ||
152 | spin_lock_irqsave(&psdev->lock, flags); | |
153 | if (!psdev->pdev) { | |
154 | psdev->pdev = pdev; | |
155 | pci_dev = psdev->dev; | |
156 | } | |
157 | spin_unlock_irqrestore(&psdev->lock, flags); | |
158 | ||
159 | if (!pci_dev) | |
160 | pcistub_device_put(psdev); | |
161 | ||
162 | return pci_dev; | |
163 | } | |
164 | ||
a92336a1 | 165 | struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev, |
30edc14b KRW |
166 | int domain, int bus, |
167 | int slot, int func) | |
168 | { | |
169 | struct pcistub_device *psdev; | |
170 | struct pci_dev *found_dev = NULL; | |
171 | unsigned long flags; | |
172 | ||
173 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
174 | ||
175 | list_for_each_entry(psdev, &pcistub_devices, dev_list) { | |
176 | if (psdev->dev != NULL | |
177 | && domain == pci_domain_nr(psdev->dev->bus) | |
178 | && bus == psdev->dev->bus->number | |
179 | && PCI_DEVFN(slot, func) == psdev->dev->devfn) { | |
180 | found_dev = pcistub_device_get_pci_dev(pdev, psdev); | |
181 | break; | |
182 | } | |
183 | } | |
184 | ||
185 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
186 | return found_dev; | |
187 | } | |
188 | ||
a92336a1 | 189 | struct pci_dev *pcistub_get_pci_dev(struct xen_pcibk_device *pdev, |
30edc14b KRW |
190 | struct pci_dev *dev) |
191 | { | |
192 | struct pcistub_device *psdev; | |
193 | struct pci_dev *found_dev = NULL; | |
194 | unsigned long flags; | |
195 | ||
196 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
197 | ||
198 | list_for_each_entry(psdev, &pcistub_devices, dev_list) { | |
199 | if (psdev->dev == dev) { | |
200 | found_dev = pcistub_device_get_pci_dev(pdev, psdev); | |
201 | break; | |
202 | } | |
203 | } | |
204 | ||
205 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
206 | return found_dev; | |
207 | } | |
208 | ||
209 | void pcistub_put_pci_dev(struct pci_dev *dev) | |
210 | { | |
211 | struct pcistub_device *psdev, *found_psdev = NULL; | |
212 | unsigned long flags; | |
213 | ||
214 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
215 | ||
216 | list_for_each_entry(psdev, &pcistub_devices, dev_list) { | |
217 | if (psdev->dev == dev) { | |
218 | found_psdev = psdev; | |
219 | break; | |
220 | } | |
221 | } | |
222 | ||
223 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
4645bf30 KRW |
224 | if (WARN_ON(!found_psdev)) |
225 | return; | |
30edc14b KRW |
226 | |
227 | /*hold this lock for avoiding breaking link between | |
a92336a1 | 228 | * pcistub and xen_pcibk when AER is in processing |
30edc14b KRW |
229 | */ |
230 | down_write(&pcistub_sem); | |
231 | /* Cleanup our device | |
232 | * (so it's ready for the next domain) | |
233 | */ | |
a92336a1 KRW |
234 | xen_pcibk_reset_device(found_psdev->dev); |
235 | xen_pcibk_config_free_dyn_fields(found_psdev->dev); | |
236 | xen_pcibk_config_reset_dev(found_psdev->dev); | |
30edc14b | 237 | |
31673558 KRW |
238 | xen_unregister_device_domain_owner(found_psdev->dev); |
239 | ||
30edc14b KRW |
240 | spin_lock_irqsave(&found_psdev->lock, flags); |
241 | found_psdev->pdev = NULL; | |
242 | spin_unlock_irqrestore(&found_psdev->lock, flags); | |
243 | ||
244 | pcistub_device_put(found_psdev); | |
245 | up_write(&pcistub_sem); | |
246 | } | |
247 | ||
248 | static int __devinit pcistub_match_one(struct pci_dev *dev, | |
249 | struct pcistub_device_id *pdev_id) | |
250 | { | |
251 | /* Match the specified device by domain, bus, slot, func and also if | |
252 | * any of the device's parent bridges match. | |
253 | */ | |
254 | for (; dev != NULL; dev = dev->bus->self) { | |
255 | if (pci_domain_nr(dev->bus) == pdev_id->domain | |
256 | && dev->bus->number == pdev_id->bus | |
257 | && dev->devfn == pdev_id->devfn) | |
258 | return 1; | |
259 | ||
260 | /* Sometimes topmost bridge links to itself. */ | |
261 | if (dev == dev->bus->self) | |
262 | break; | |
263 | } | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | static int __devinit pcistub_match(struct pci_dev *dev) | |
269 | { | |
270 | struct pcistub_device_id *pdev_id; | |
271 | unsigned long flags; | |
272 | int found = 0; | |
273 | ||
274 | spin_lock_irqsave(&device_ids_lock, flags); | |
275 | list_for_each_entry(pdev_id, &pcistub_device_ids, slot_list) { | |
276 | if (pcistub_match_one(dev, pdev_id)) { | |
277 | found = 1; | |
278 | break; | |
279 | } | |
280 | } | |
281 | spin_unlock_irqrestore(&device_ids_lock, flags); | |
282 | ||
283 | return found; | |
284 | } | |
285 | ||
286 | static int __devinit pcistub_init_device(struct pci_dev *dev) | |
287 | { | |
a92336a1 | 288 | struct xen_pcibk_dev_data *dev_data; |
30edc14b KRW |
289 | int err = 0; |
290 | ||
291 | dev_dbg(&dev->dev, "initializing...\n"); | |
292 | ||
293 | /* The PCI backend is not intended to be a module (or to work with | |
a92336a1 | 294 | * removable PCI devices (yet). If it were, xen_pcibk_config_free() |
30edc14b KRW |
295 | * would need to be called somewhere to free the memory allocated |
296 | * here and then to call kfree(pci_get_drvdata(psdev->dev)). | |
297 | */ | |
0513fe9e KRW |
298 | dev_data = kzalloc(sizeof(*dev_data) + strlen(DRV_NAME "[]") |
299 | + strlen(pci_name(dev)) + 1, GFP_ATOMIC); | |
30edc14b KRW |
300 | if (!dev_data) { |
301 | err = -ENOMEM; | |
302 | goto out; | |
303 | } | |
304 | pci_set_drvdata(dev, dev_data); | |
305 | ||
0513fe9e KRW |
306 | /* |
307 | * Setup name for fake IRQ handler. It will only be enabled | |
308 | * once the device is turned on by the guest. | |
309 | */ | |
310 | sprintf(dev_data->irq_name, DRV_NAME "[%s]", pci_name(dev)); | |
311 | ||
30edc14b KRW |
312 | dev_dbg(&dev->dev, "initializing config\n"); |
313 | ||
a92336a1 KRW |
314 | init_waitqueue_head(&xen_pcibk_aer_wait_queue); |
315 | err = xen_pcibk_config_init_dev(dev); | |
30edc14b KRW |
316 | if (err) |
317 | goto out; | |
318 | ||
319 | /* HACK: Force device (& ACPI) to determine what IRQ it's on - we | |
320 | * must do this here because pcibios_enable_device may specify | |
321 | * the pci device's true irq (and possibly its other resources) | |
322 | * if they differ from what's in the configuration space. | |
323 | * This makes the assumption that the device's resources won't | |
324 | * change after this point (otherwise this code may break!) | |
325 | */ | |
326 | dev_dbg(&dev->dev, "enabling device\n"); | |
327 | err = pci_enable_device(dev); | |
328 | if (err) | |
329 | goto config_release; | |
330 | ||
331 | /* Now disable the device (this also ensures some private device | |
332 | * data is setup before we export) | |
333 | */ | |
334 | dev_dbg(&dev->dev, "reset device\n"); | |
a92336a1 | 335 | xen_pcibk_reset_device(dev); |
30edc14b | 336 | |
97309d39 | 337 | dev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED; |
30edc14b KRW |
338 | return 0; |
339 | ||
340 | config_release: | |
a92336a1 | 341 | xen_pcibk_config_free_dev(dev); |
30edc14b KRW |
342 | |
343 | out: | |
344 | pci_set_drvdata(dev, NULL); | |
345 | kfree(dev_data); | |
346 | return err; | |
347 | } | |
348 | ||
349 | /* | |
350 | * Because some initialization still happens on | |
351 | * devices during fs_initcall, we need to defer | |
352 | * full initialization of our devices until | |
353 | * device_initcall. | |
354 | */ | |
355 | static int __init pcistub_init_devices_late(void) | |
356 | { | |
357 | struct pcistub_device *psdev; | |
358 | unsigned long flags; | |
359 | int err = 0; | |
360 | ||
a92336a1 | 361 | pr_debug(DRV_NAME ": pcistub_init_devices_late\n"); |
30edc14b KRW |
362 | |
363 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
364 | ||
365 | while (!list_empty(&seized_devices)) { | |
366 | psdev = container_of(seized_devices.next, | |
367 | struct pcistub_device, dev_list); | |
368 | list_del(&psdev->dev_list); | |
369 | ||
370 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
371 | ||
372 | err = pcistub_init_device(psdev->dev); | |
373 | if (err) { | |
374 | dev_err(&psdev->dev->dev, | |
375 | "error %d initializing device\n", err); | |
376 | kfree(psdev); | |
377 | psdev = NULL; | |
378 | } | |
379 | ||
380 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
381 | ||
382 | if (psdev) | |
383 | list_add_tail(&psdev->dev_list, &pcistub_devices); | |
384 | } | |
385 | ||
386 | initialize_devices = 1; | |
387 | ||
388 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
393 | static int __devinit pcistub_seize(struct pci_dev *dev) | |
394 | { | |
395 | struct pcistub_device *psdev; | |
396 | unsigned long flags; | |
397 | int err = 0; | |
398 | ||
399 | psdev = pcistub_device_alloc(dev); | |
400 | if (!psdev) | |
401 | return -ENOMEM; | |
402 | ||
403 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
404 | ||
405 | if (initialize_devices) { | |
406 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
407 | ||
408 | /* don't want irqs disabled when calling pcistub_init_device */ | |
409 | err = pcistub_init_device(psdev->dev); | |
410 | ||
411 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
412 | ||
413 | if (!err) | |
414 | list_add(&psdev->dev_list, &pcistub_devices); | |
415 | } else { | |
416 | dev_dbg(&dev->dev, "deferring initialization\n"); | |
417 | list_add(&psdev->dev_list, &seized_devices); | |
418 | } | |
419 | ||
420 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
421 | ||
422 | if (err) | |
423 | pcistub_device_put(psdev); | |
424 | ||
425 | return err; | |
426 | } | |
427 | ||
428 | static int __devinit pcistub_probe(struct pci_dev *dev, | |
429 | const struct pci_device_id *id) | |
430 | { | |
431 | int err = 0; | |
432 | ||
433 | dev_dbg(&dev->dev, "probing...\n"); | |
434 | ||
435 | if (pcistub_match(dev)) { | |
436 | ||
437 | if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL | |
438 | && dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) { | |
439 | dev_err(&dev->dev, "can't export pci devices that " | |
440 | "don't have a normal (0) or bridge (1) " | |
441 | "header type!\n"); | |
442 | err = -ENODEV; | |
443 | goto out; | |
444 | } | |
445 | ||
446 | dev_info(&dev->dev, "seizing device\n"); | |
447 | err = pcistub_seize(dev); | |
448 | } else | |
449 | /* Didn't find the device */ | |
450 | err = -ENODEV; | |
451 | ||
452 | out: | |
453 | return err; | |
454 | } | |
455 | ||
456 | static void pcistub_remove(struct pci_dev *dev) | |
457 | { | |
458 | struct pcistub_device *psdev, *found_psdev = NULL; | |
459 | unsigned long flags; | |
460 | ||
461 | dev_dbg(&dev->dev, "removing\n"); | |
462 | ||
463 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
464 | ||
a92336a1 | 465 | xen_pcibk_config_quirk_release(dev); |
30edc14b KRW |
466 | |
467 | list_for_each_entry(psdev, &pcistub_devices, dev_list) { | |
468 | if (psdev->dev == dev) { | |
469 | found_psdev = psdev; | |
470 | break; | |
471 | } | |
472 | } | |
473 | ||
474 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
475 | ||
476 | if (found_psdev) { | |
477 | dev_dbg(&dev->dev, "found device to remove - in use? %p\n", | |
478 | found_psdev->pdev); | |
479 | ||
480 | if (found_psdev->pdev) { | |
a92336a1 | 481 | printk(KERN_WARNING DRV_NAME ": ****** removing device " |
30edc14b KRW |
482 | "%s while still in-use! ******\n", |
483 | pci_name(found_psdev->dev)); | |
a92336a1 KRW |
484 | printk(KERN_WARNING DRV_NAME ": ****** driver domain may" |
485 | " still access this device's i/o resources!\n"); | |
486 | printk(KERN_WARNING DRV_NAME ": ****** shutdown driver " | |
30edc14b | 487 | "domain before binding device\n"); |
a92336a1 | 488 | printk(KERN_WARNING DRV_NAME ": ****** to other drivers " |
30edc14b KRW |
489 | "or domains\n"); |
490 | ||
a92336a1 | 491 | xen_pcibk_release_pci_dev(found_psdev->pdev, |
30edc14b KRW |
492 | found_psdev->dev); |
493 | } | |
494 | ||
495 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
496 | list_del(&found_psdev->dev_list); | |
497 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
498 | ||
499 | /* the final put for releasing from the list */ | |
500 | pcistub_device_put(found_psdev); | |
501 | } | |
502 | } | |
503 | ||
8bfd4e02 | 504 | static DEFINE_PCI_DEVICE_TABLE(pcistub_ids) = { |
30edc14b KRW |
505 | { |
506 | .vendor = PCI_ANY_ID, | |
507 | .device = PCI_ANY_ID, | |
508 | .subvendor = PCI_ANY_ID, | |
509 | .subdevice = PCI_ANY_ID, | |
510 | }, | |
511 | {0,}, | |
512 | }; | |
513 | ||
514 | #define PCI_NODENAME_MAX 40 | |
515 | static void kill_domain_by_device(struct pcistub_device *psdev) | |
516 | { | |
517 | struct xenbus_transaction xbt; | |
518 | int err; | |
519 | char nodename[PCI_NODENAME_MAX]; | |
520 | ||
72bf809a | 521 | BUG_ON(!psdev); |
30edc14b KRW |
522 | snprintf(nodename, PCI_NODENAME_MAX, "/local/domain/0/backend/pci/%d/0", |
523 | psdev->pdev->xdev->otherend_id); | |
30edc14b KRW |
524 | |
525 | again: | |
526 | err = xenbus_transaction_start(&xbt); | |
527 | if (err) { | |
528 | dev_err(&psdev->dev->dev, | |
529 | "error %d when start xenbus transaction\n", err); | |
530 | return; | |
531 | } | |
532 | /*PV AER handlers will set this flag*/ | |
533 | xenbus_printf(xbt, nodename, "aerState" , "aerfail"); | |
534 | err = xenbus_transaction_end(xbt, 0); | |
535 | if (err) { | |
536 | if (err == -EAGAIN) | |
537 | goto again; | |
538 | dev_err(&psdev->dev->dev, | |
539 | "error %d when end xenbus transaction\n", err); | |
540 | return; | |
541 | } | |
542 | } | |
543 | ||
544 | /* For each aer recovery step error_detected, mmio_enabled, etc, front_end and | |
a92336a1 | 545 | * backend need to have cooperation. In xen_pcibk, those steps will do similar |
30edc14b KRW |
546 | * jobs: send service request and waiting for front_end response. |
547 | */ | |
548 | static pci_ers_result_t common_process(struct pcistub_device *psdev, | |
a92336a1 KRW |
549 | pci_channel_state_t state, int aer_cmd, |
550 | pci_ers_result_t result) | |
30edc14b KRW |
551 | { |
552 | pci_ers_result_t res = result; | |
553 | struct xen_pcie_aer_op *aer_op; | |
554 | int ret; | |
555 | ||
556 | /*with PV AER drivers*/ | |
557 | aer_op = &(psdev->pdev->sh_info->aer_op); | |
558 | aer_op->cmd = aer_cmd ; | |
559 | /*useful for error_detected callback*/ | |
560 | aer_op->err = state; | |
561 | /*pcifront_end BDF*/ | |
a92336a1 | 562 | ret = xen_pcibk_get_pcifront_dev(psdev->dev, psdev->pdev, |
30edc14b KRW |
563 | &aer_op->domain, &aer_op->bus, &aer_op->devfn); |
564 | if (!ret) { | |
565 | dev_err(&psdev->dev->dev, | |
a92336a1 | 566 | DRV_NAME ": failed to get pcifront device\n"); |
30edc14b KRW |
567 | return PCI_ERS_RESULT_NONE; |
568 | } | |
569 | wmb(); | |
570 | ||
571 | dev_dbg(&psdev->dev->dev, | |
a92336a1 | 572 | DRV_NAME ": aer_op %x dom %x bus %x devfn %x\n", |
30edc14b | 573 | aer_cmd, aer_op->domain, aer_op->bus, aer_op->devfn); |
a92336a1 KRW |
574 | /*local flag to mark there's aer request, xen_pcibk callback will use |
575 | * this flag to judge whether we need to check pci-front give aer | |
576 | * service ack signal | |
30edc14b KRW |
577 | */ |
578 | set_bit(_PCIB_op_pending, (unsigned long *)&psdev->pdev->flags); | |
579 | ||
580 | /*It is possible that a pcifront conf_read_write ops request invokes | |
581 | * the callback which cause the spurious execution of wake_up. | |
582 | * Yet it is harmless and better than a spinlock here | |
583 | */ | |
584 | set_bit(_XEN_PCIB_active, | |
585 | (unsigned long *)&psdev->pdev->sh_info->flags); | |
586 | wmb(); | |
587 | notify_remote_via_irq(psdev->pdev->evtchn_irq); | |
588 | ||
a92336a1 KRW |
589 | ret = wait_event_timeout(xen_pcibk_aer_wait_queue, |
590 | !(test_bit(_XEN_PCIB_active, (unsigned long *) | |
591 | &psdev->pdev->sh_info->flags)), 300*HZ); | |
30edc14b KRW |
592 | |
593 | if (!ret) { | |
594 | if (test_bit(_XEN_PCIB_active, | |
595 | (unsigned long *)&psdev->pdev->sh_info->flags)) { | |
596 | dev_err(&psdev->dev->dev, | |
597 | "pcifront aer process not responding!\n"); | |
598 | clear_bit(_XEN_PCIB_active, | |
599 | (unsigned long *)&psdev->pdev->sh_info->flags); | |
600 | aer_op->err = PCI_ERS_RESULT_NONE; | |
601 | return res; | |
602 | } | |
603 | } | |
604 | clear_bit(_PCIB_op_pending, (unsigned long *)&psdev->pdev->flags); | |
605 | ||
606 | if (test_bit(_XEN_PCIF_active, | |
607 | (unsigned long *)&psdev->pdev->sh_info->flags)) { | |
608 | dev_dbg(&psdev->dev->dev, | |
402c5e15 | 609 | "schedule pci_conf service in " DRV_NAME "\n"); |
a92336a1 | 610 | xen_pcibk_test_and_schedule_op(psdev->pdev); |
30edc14b KRW |
611 | } |
612 | ||
613 | res = (pci_ers_result_t)aer_op->err; | |
614 | return res; | |
615 | } | |
616 | ||
617 | /* | |
a92336a1 | 618 | * xen_pcibk_slot_reset: it will send the slot_reset request to pcifront in case |
30edc14b KRW |
619 | * of the device driver could provide this service, and then wait for pcifront |
620 | * ack. | |
621 | * @dev: pointer to PCI devices | |
622 | * return value is used by aer_core do_recovery policy | |
623 | */ | |
a92336a1 | 624 | static pci_ers_result_t xen_pcibk_slot_reset(struct pci_dev *dev) |
30edc14b KRW |
625 | { |
626 | struct pcistub_device *psdev; | |
627 | pci_ers_result_t result; | |
628 | ||
629 | result = PCI_ERS_RESULT_RECOVERED; | |
a92336a1 | 630 | dev_dbg(&dev->dev, "xen_pcibk_slot_reset(bus:%x,devfn:%x)\n", |
30edc14b KRW |
631 | dev->bus->number, dev->devfn); |
632 | ||
633 | down_write(&pcistub_sem); | |
634 | psdev = pcistub_device_find(pci_domain_nr(dev->bus), | |
635 | dev->bus->number, | |
636 | PCI_SLOT(dev->devfn), | |
637 | PCI_FUNC(dev->devfn)); | |
638 | ||
639 | if (!psdev || !psdev->pdev) { | |
640 | dev_err(&dev->dev, | |
a92336a1 | 641 | DRV_NAME " device is not found/assigned\n"); |
30edc14b KRW |
642 | goto end; |
643 | } | |
644 | ||
645 | if (!psdev->pdev->sh_info) { | |
a92336a1 | 646 | dev_err(&dev->dev, DRV_NAME " device is not connected or owned" |
30edc14b KRW |
647 | " by HVM, kill it\n"); |
648 | kill_domain_by_device(psdev); | |
649 | goto release; | |
650 | } | |
651 | ||
652 | if (!test_bit(_XEN_PCIB_AERHANDLER, | |
653 | (unsigned long *)&psdev->pdev->sh_info->flags)) { | |
654 | dev_err(&dev->dev, | |
655 | "guest with no AER driver should have been killed\n"); | |
656 | goto release; | |
657 | } | |
658 | result = common_process(psdev, 1, XEN_PCI_OP_aer_slotreset, result); | |
659 | ||
660 | if (result == PCI_ERS_RESULT_NONE || | |
661 | result == PCI_ERS_RESULT_DISCONNECT) { | |
662 | dev_dbg(&dev->dev, | |
663 | "No AER slot_reset service or disconnected!\n"); | |
664 | kill_domain_by_device(psdev); | |
665 | } | |
666 | release: | |
667 | pcistub_device_put(psdev); | |
668 | end: | |
669 | up_write(&pcistub_sem); | |
670 | return result; | |
671 | ||
672 | } | |
673 | ||
674 | ||
a92336a1 | 675 | /*xen_pcibk_mmio_enabled: it will send the mmio_enabled request to pcifront |
30edc14b KRW |
676 | * in case of the device driver could provide this service, and then wait |
677 | * for pcifront ack | |
678 | * @dev: pointer to PCI devices | |
679 | * return value is used by aer_core do_recovery policy | |
680 | */ | |
681 | ||
a92336a1 | 682 | static pci_ers_result_t xen_pcibk_mmio_enabled(struct pci_dev *dev) |
30edc14b KRW |
683 | { |
684 | struct pcistub_device *psdev; | |
685 | pci_ers_result_t result; | |
686 | ||
687 | result = PCI_ERS_RESULT_RECOVERED; | |
a92336a1 | 688 | dev_dbg(&dev->dev, "xen_pcibk_mmio_enabled(bus:%x,devfn:%x)\n", |
30edc14b KRW |
689 | dev->bus->number, dev->devfn); |
690 | ||
691 | down_write(&pcistub_sem); | |
692 | psdev = pcistub_device_find(pci_domain_nr(dev->bus), | |
693 | dev->bus->number, | |
694 | PCI_SLOT(dev->devfn), | |
695 | PCI_FUNC(dev->devfn)); | |
696 | ||
697 | if (!psdev || !psdev->pdev) { | |
698 | dev_err(&dev->dev, | |
a92336a1 | 699 | DRV_NAME " device is not found/assigned\n"); |
30edc14b KRW |
700 | goto end; |
701 | } | |
702 | ||
703 | if (!psdev->pdev->sh_info) { | |
a92336a1 | 704 | dev_err(&dev->dev, DRV_NAME " device is not connected or owned" |
30edc14b KRW |
705 | " by HVM, kill it\n"); |
706 | kill_domain_by_device(psdev); | |
707 | goto release; | |
708 | } | |
709 | ||
710 | if (!test_bit(_XEN_PCIB_AERHANDLER, | |
711 | (unsigned long *)&psdev->pdev->sh_info->flags)) { | |
712 | dev_err(&dev->dev, | |
713 | "guest with no AER driver should have been killed\n"); | |
714 | goto release; | |
715 | } | |
716 | result = common_process(psdev, 1, XEN_PCI_OP_aer_mmio, result); | |
717 | ||
718 | if (result == PCI_ERS_RESULT_NONE || | |
719 | result == PCI_ERS_RESULT_DISCONNECT) { | |
720 | dev_dbg(&dev->dev, | |
721 | "No AER mmio_enabled service or disconnected!\n"); | |
722 | kill_domain_by_device(psdev); | |
723 | } | |
724 | release: | |
725 | pcistub_device_put(psdev); | |
726 | end: | |
727 | up_write(&pcistub_sem); | |
728 | return result; | |
729 | } | |
730 | ||
a92336a1 | 731 | /*xen_pcibk_error_detected: it will send the error_detected request to pcifront |
30edc14b KRW |
732 | * in case of the device driver could provide this service, and then wait |
733 | * for pcifront ack. | |
734 | * @dev: pointer to PCI devices | |
735 | * @error: the current PCI connection state | |
736 | * return value is used by aer_core do_recovery policy | |
737 | */ | |
738 | ||
a92336a1 | 739 | static pci_ers_result_t xen_pcibk_error_detected(struct pci_dev *dev, |
30edc14b KRW |
740 | pci_channel_state_t error) |
741 | { | |
742 | struct pcistub_device *psdev; | |
743 | pci_ers_result_t result; | |
744 | ||
745 | result = PCI_ERS_RESULT_CAN_RECOVER; | |
a92336a1 | 746 | dev_dbg(&dev->dev, "xen_pcibk_error_detected(bus:%x,devfn:%x)\n", |
30edc14b KRW |
747 | dev->bus->number, dev->devfn); |
748 | ||
749 | down_write(&pcistub_sem); | |
750 | psdev = pcistub_device_find(pci_domain_nr(dev->bus), | |
751 | dev->bus->number, | |
752 | PCI_SLOT(dev->devfn), | |
753 | PCI_FUNC(dev->devfn)); | |
754 | ||
755 | if (!psdev || !psdev->pdev) { | |
756 | dev_err(&dev->dev, | |
a92336a1 | 757 | DRV_NAME " device is not found/assigned\n"); |
30edc14b KRW |
758 | goto end; |
759 | } | |
760 | ||
761 | if (!psdev->pdev->sh_info) { | |
a92336a1 | 762 | dev_err(&dev->dev, DRV_NAME " device is not connected or owned" |
30edc14b KRW |
763 | " by HVM, kill it\n"); |
764 | kill_domain_by_device(psdev); | |
765 | goto release; | |
766 | } | |
767 | ||
768 | /*Guest owns the device yet no aer handler regiested, kill guest*/ | |
769 | if (!test_bit(_XEN_PCIB_AERHANDLER, | |
770 | (unsigned long *)&psdev->pdev->sh_info->flags)) { | |
771 | dev_dbg(&dev->dev, "guest may have no aer driver, kill it\n"); | |
772 | kill_domain_by_device(psdev); | |
773 | goto release; | |
774 | } | |
775 | result = common_process(psdev, error, XEN_PCI_OP_aer_detected, result); | |
776 | ||
777 | if (result == PCI_ERS_RESULT_NONE || | |
778 | result == PCI_ERS_RESULT_DISCONNECT) { | |
779 | dev_dbg(&dev->dev, | |
780 | "No AER error_detected service or disconnected!\n"); | |
781 | kill_domain_by_device(psdev); | |
782 | } | |
783 | release: | |
784 | pcistub_device_put(psdev); | |
785 | end: | |
786 | up_write(&pcistub_sem); | |
787 | return result; | |
788 | } | |
789 | ||
a92336a1 | 790 | /*xen_pcibk_error_resume: it will send the error_resume request to pcifront |
30edc14b KRW |
791 | * in case of the device driver could provide this service, and then wait |
792 | * for pcifront ack. | |
793 | * @dev: pointer to PCI devices | |
794 | */ | |
795 | ||
a92336a1 | 796 | static void xen_pcibk_error_resume(struct pci_dev *dev) |
30edc14b KRW |
797 | { |
798 | struct pcistub_device *psdev; | |
799 | ||
a92336a1 | 800 | dev_dbg(&dev->dev, "xen_pcibk_error_resume(bus:%x,devfn:%x)\n", |
30edc14b KRW |
801 | dev->bus->number, dev->devfn); |
802 | ||
803 | down_write(&pcistub_sem); | |
804 | psdev = pcistub_device_find(pci_domain_nr(dev->bus), | |
805 | dev->bus->number, | |
806 | PCI_SLOT(dev->devfn), | |
807 | PCI_FUNC(dev->devfn)); | |
808 | ||
809 | if (!psdev || !psdev->pdev) { | |
810 | dev_err(&dev->dev, | |
a92336a1 | 811 | DRV_NAME " device is not found/assigned\n"); |
30edc14b KRW |
812 | goto end; |
813 | } | |
814 | ||
815 | if (!psdev->pdev->sh_info) { | |
a92336a1 | 816 | dev_err(&dev->dev, DRV_NAME " device is not connected or owned" |
30edc14b KRW |
817 | " by HVM, kill it\n"); |
818 | kill_domain_by_device(psdev); | |
819 | goto release; | |
820 | } | |
821 | ||
822 | if (!test_bit(_XEN_PCIB_AERHANDLER, | |
823 | (unsigned long *)&psdev->pdev->sh_info->flags)) { | |
824 | dev_err(&dev->dev, | |
825 | "guest with no AER driver should have been killed\n"); | |
826 | kill_domain_by_device(psdev); | |
827 | goto release; | |
828 | } | |
829 | common_process(psdev, 1, XEN_PCI_OP_aer_resume, | |
830 | PCI_ERS_RESULT_RECOVERED); | |
831 | release: | |
832 | pcistub_device_put(psdev); | |
833 | end: | |
834 | up_write(&pcistub_sem); | |
835 | return; | |
836 | } | |
837 | ||
a92336a1 KRW |
838 | /*add xen_pcibk AER handling*/ |
839 | static struct pci_error_handlers xen_pcibk_error_handler = { | |
840 | .error_detected = xen_pcibk_error_detected, | |
841 | .mmio_enabled = xen_pcibk_mmio_enabled, | |
842 | .slot_reset = xen_pcibk_slot_reset, | |
843 | .resume = xen_pcibk_error_resume, | |
30edc14b KRW |
844 | }; |
845 | ||
846 | /* | |
847 | * Note: There is no MODULE_DEVICE_TABLE entry here because this isn't | |
848 | * for a normal device. I don't want it to be loaded automatically. | |
849 | */ | |
850 | ||
a92336a1 KRW |
851 | static struct pci_driver xen_pcibk_pci_driver = { |
852 | /* The name should be xen_pciback, but until the tools are updated | |
853 | * we will keep it as pciback. */ | |
854 | .name = "pciback", | |
30edc14b KRW |
855 | .id_table = pcistub_ids, |
856 | .probe = pcistub_probe, | |
857 | .remove = pcistub_remove, | |
a92336a1 | 858 | .err_handler = &xen_pcibk_error_handler, |
30edc14b KRW |
859 | }; |
860 | ||
861 | static inline int str_to_slot(const char *buf, int *domain, int *bus, | |
862 | int *slot, int *func) | |
863 | { | |
864 | int err; | |
865 | ||
866 | err = sscanf(buf, " %x:%x:%x.%x", domain, bus, slot, func); | |
867 | if (err == 4) | |
868 | return 0; | |
869 | else if (err < 0) | |
870 | return -EINVAL; | |
871 | ||
872 | /* try again without domain */ | |
873 | *domain = 0; | |
874 | err = sscanf(buf, " %x:%x.%x", bus, slot, func); | |
875 | if (err == 3) | |
876 | return 0; | |
877 | ||
878 | return -EINVAL; | |
879 | } | |
880 | ||
881 | static inline int str_to_quirk(const char *buf, int *domain, int *bus, int | |
882 | *slot, int *func, int *reg, int *size, int *mask) | |
883 | { | |
884 | int err; | |
885 | ||
886 | err = | |
887 | sscanf(buf, " %04x:%02x:%02x.%1x-%08x:%1x:%08x", domain, bus, slot, | |
888 | func, reg, size, mask); | |
889 | if (err == 7) | |
890 | return 0; | |
891 | return -EINVAL; | |
892 | } | |
893 | ||
894 | static int pcistub_device_id_add(int domain, int bus, int slot, int func) | |
895 | { | |
896 | struct pcistub_device_id *pci_dev_id; | |
897 | unsigned long flags; | |
898 | ||
899 | pci_dev_id = kmalloc(sizeof(*pci_dev_id), GFP_KERNEL); | |
900 | if (!pci_dev_id) | |
901 | return -ENOMEM; | |
902 | ||
903 | pci_dev_id->domain = domain; | |
904 | pci_dev_id->bus = bus; | |
905 | pci_dev_id->devfn = PCI_DEVFN(slot, func); | |
906 | ||
a92336a1 | 907 | pr_debug(DRV_NAME ": wants to seize %04x:%02x:%02x.%01x\n", |
30edc14b KRW |
908 | domain, bus, slot, func); |
909 | ||
910 | spin_lock_irqsave(&device_ids_lock, flags); | |
911 | list_add_tail(&pci_dev_id->slot_list, &pcistub_device_ids); | |
912 | spin_unlock_irqrestore(&device_ids_lock, flags); | |
913 | ||
914 | return 0; | |
915 | } | |
916 | ||
917 | static int pcistub_device_id_remove(int domain, int bus, int slot, int func) | |
918 | { | |
919 | struct pcistub_device_id *pci_dev_id, *t; | |
920 | int devfn = PCI_DEVFN(slot, func); | |
921 | int err = -ENOENT; | |
922 | unsigned long flags; | |
923 | ||
924 | spin_lock_irqsave(&device_ids_lock, flags); | |
925 | list_for_each_entry_safe(pci_dev_id, t, &pcistub_device_ids, | |
926 | slot_list) { | |
927 | if (pci_dev_id->domain == domain | |
928 | && pci_dev_id->bus == bus && pci_dev_id->devfn == devfn) { | |
929 | /* Don't break; here because it's possible the same | |
930 | * slot could be in the list more than once | |
931 | */ | |
932 | list_del(&pci_dev_id->slot_list); | |
933 | kfree(pci_dev_id); | |
934 | ||
935 | err = 0; | |
936 | ||
a92336a1 | 937 | pr_debug(DRV_NAME ": removed %04x:%02x:%02x.%01x from " |
30edc14b KRW |
938 | "seize list\n", domain, bus, slot, func); |
939 | } | |
940 | } | |
941 | spin_unlock_irqrestore(&device_ids_lock, flags); | |
942 | ||
943 | return err; | |
944 | } | |
945 | ||
946 | static int pcistub_reg_add(int domain, int bus, int slot, int func, int reg, | |
947 | int size, int mask) | |
948 | { | |
949 | int err = 0; | |
950 | struct pcistub_device *psdev; | |
951 | struct pci_dev *dev; | |
952 | struct config_field *field; | |
953 | ||
954 | psdev = pcistub_device_find(domain, bus, slot, func); | |
955 | if (!psdev || !psdev->dev) { | |
956 | err = -ENODEV; | |
957 | goto out; | |
958 | } | |
959 | dev = psdev->dev; | |
960 | ||
961 | field = kzalloc(sizeof(*field), GFP_ATOMIC); | |
962 | if (!field) { | |
963 | err = -ENOMEM; | |
964 | goto out; | |
965 | } | |
966 | ||
967 | field->offset = reg; | |
968 | field->size = size; | |
969 | field->mask = mask; | |
970 | field->init = NULL; | |
971 | field->reset = NULL; | |
972 | field->release = NULL; | |
a92336a1 | 973 | field->clean = xen_pcibk_config_field_free; |
30edc14b | 974 | |
a92336a1 | 975 | err = xen_pcibk_config_quirks_add_field(dev, field); |
30edc14b KRW |
976 | if (err) |
977 | kfree(field); | |
978 | out: | |
979 | return err; | |
980 | } | |
981 | ||
982 | static ssize_t pcistub_slot_add(struct device_driver *drv, const char *buf, | |
983 | size_t count) | |
984 | { | |
985 | int domain, bus, slot, func; | |
986 | int err; | |
987 | ||
988 | err = str_to_slot(buf, &domain, &bus, &slot, &func); | |
989 | if (err) | |
990 | goto out; | |
991 | ||
992 | err = pcistub_device_id_add(domain, bus, slot, func); | |
993 | ||
994 | out: | |
995 | if (!err) | |
996 | err = count; | |
997 | return err; | |
998 | } | |
402c5e15 | 999 | static DRIVER_ATTR(new_slot, S_IWUSR, NULL, pcistub_slot_add); |
30edc14b KRW |
1000 | |
1001 | static ssize_t pcistub_slot_remove(struct device_driver *drv, const char *buf, | |
1002 | size_t count) | |
1003 | { | |
1004 | int domain, bus, slot, func; | |
1005 | int err; | |
1006 | ||
1007 | err = str_to_slot(buf, &domain, &bus, &slot, &func); | |
1008 | if (err) | |
1009 | goto out; | |
1010 | ||
1011 | err = pcistub_device_id_remove(domain, bus, slot, func); | |
1012 | ||
1013 | out: | |
1014 | if (!err) | |
1015 | err = count; | |
1016 | return err; | |
1017 | } | |
402c5e15 | 1018 | static DRIVER_ATTR(remove_slot, S_IWUSR, NULL, pcistub_slot_remove); |
30edc14b KRW |
1019 | |
1020 | static ssize_t pcistub_slot_show(struct device_driver *drv, char *buf) | |
1021 | { | |
1022 | struct pcistub_device_id *pci_dev_id; | |
1023 | size_t count = 0; | |
1024 | unsigned long flags; | |
1025 | ||
1026 | spin_lock_irqsave(&device_ids_lock, flags); | |
1027 | list_for_each_entry(pci_dev_id, &pcistub_device_ids, slot_list) { | |
1028 | if (count >= PAGE_SIZE) | |
1029 | break; | |
1030 | ||
1031 | count += scnprintf(buf + count, PAGE_SIZE - count, | |
1032 | "%04x:%02x:%02x.%01x\n", | |
1033 | pci_dev_id->domain, pci_dev_id->bus, | |
1034 | PCI_SLOT(pci_dev_id->devfn), | |
1035 | PCI_FUNC(pci_dev_id->devfn)); | |
1036 | } | |
1037 | spin_unlock_irqrestore(&device_ids_lock, flags); | |
1038 | ||
1039 | return count; | |
1040 | } | |
402c5e15 | 1041 | static DRIVER_ATTR(slots, S_IRUSR, pcistub_slot_show, NULL); |
30edc14b | 1042 | |
0513fe9e KRW |
1043 | static ssize_t pcistub_irq_handler_show(struct device_driver *drv, char *buf) |
1044 | { | |
1045 | struct pcistub_device *psdev; | |
a92336a1 | 1046 | struct xen_pcibk_dev_data *dev_data; |
0513fe9e KRW |
1047 | size_t count = 0; |
1048 | unsigned long flags; | |
1049 | ||
1050 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
1051 | list_for_each_entry(psdev, &pcistub_devices, dev_list) { | |
1052 | if (count >= PAGE_SIZE) | |
1053 | break; | |
1054 | if (!psdev->dev) | |
1055 | continue; | |
1056 | dev_data = pci_get_drvdata(psdev->dev); | |
1057 | if (!dev_data) | |
1058 | continue; | |
1059 | count += | |
1060 | scnprintf(buf + count, PAGE_SIZE - count, | |
1061 | "%s:%s:%sing:%ld\n", | |
1062 | pci_name(psdev->dev), | |
1063 | dev_data->isr_on ? "on" : "off", | |
1064 | dev_data->ack_intr ? "ack" : "not ack", | |
1065 | dev_data->handled); | |
1066 | } | |
1067 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
1068 | return count; | |
1069 | } | |
402c5e15 | 1070 | static DRIVER_ATTR(irq_handlers, S_IRUSR, pcistub_irq_handler_show, NULL); |
0513fe9e KRW |
1071 | |
1072 | static ssize_t pcistub_irq_handler_switch(struct device_driver *drv, | |
1073 | const char *buf, | |
1074 | size_t count) | |
1075 | { | |
1076 | struct pcistub_device *psdev; | |
a92336a1 | 1077 | struct xen_pcibk_dev_data *dev_data; |
0513fe9e KRW |
1078 | int domain, bus, slot, func; |
1079 | int err = -ENOENT; | |
1080 | ||
1081 | err = str_to_slot(buf, &domain, &bus, &slot, &func); | |
1082 | if (err) | |
1083 | goto out; | |
1084 | ||
1085 | psdev = pcistub_device_find(domain, bus, slot, func); | |
1086 | ||
1087 | if (!psdev) | |
1088 | goto out; | |
1089 | ||
1090 | dev_data = pci_get_drvdata(psdev->dev); | |
1091 | if (!dev_data) | |
1092 | goto out; | |
1093 | ||
1094 | dev_dbg(&psdev->dev->dev, "%s fake irq handler: %d->%d\n", | |
1095 | dev_data->irq_name, dev_data->isr_on, | |
1096 | !dev_data->isr_on); | |
1097 | ||
1098 | dev_data->isr_on = !(dev_data->isr_on); | |
1099 | if (dev_data->isr_on) | |
1100 | dev_data->ack_intr = 1; | |
1101 | out: | |
1102 | if (!err) | |
1103 | err = count; | |
1104 | return err; | |
1105 | } | |
402c5e15 JB |
1106 | static DRIVER_ATTR(irq_handler_state, S_IWUSR, NULL, |
1107 | pcistub_irq_handler_switch); | |
0513fe9e | 1108 | |
30edc14b KRW |
1109 | static ssize_t pcistub_quirk_add(struct device_driver *drv, const char *buf, |
1110 | size_t count) | |
1111 | { | |
1112 | int domain, bus, slot, func, reg, size, mask; | |
1113 | int err; | |
1114 | ||
1115 | err = str_to_quirk(buf, &domain, &bus, &slot, &func, ®, &size, | |
1116 | &mask); | |
1117 | if (err) | |
1118 | goto out; | |
1119 | ||
1120 | err = pcistub_reg_add(domain, bus, slot, func, reg, size, mask); | |
1121 | ||
1122 | out: | |
1123 | if (!err) | |
1124 | err = count; | |
1125 | return err; | |
1126 | } | |
1127 | ||
1128 | static ssize_t pcistub_quirk_show(struct device_driver *drv, char *buf) | |
1129 | { | |
1130 | int count = 0; | |
1131 | unsigned long flags; | |
a92336a1 KRW |
1132 | struct xen_pcibk_config_quirk *quirk; |
1133 | struct xen_pcibk_dev_data *dev_data; | |
30edc14b KRW |
1134 | const struct config_field *field; |
1135 | const struct config_field_entry *cfg_entry; | |
1136 | ||
1137 | spin_lock_irqsave(&device_ids_lock, flags); | |
a92336a1 | 1138 | list_for_each_entry(quirk, &xen_pcibk_quirks, quirks_list) { |
30edc14b KRW |
1139 | if (count >= PAGE_SIZE) |
1140 | goto out; | |
1141 | ||
1142 | count += scnprintf(buf + count, PAGE_SIZE - count, | |
1143 | "%02x:%02x.%01x\n\t%04x:%04x:%04x:%04x\n", | |
1144 | quirk->pdev->bus->number, | |
1145 | PCI_SLOT(quirk->pdev->devfn), | |
1146 | PCI_FUNC(quirk->pdev->devfn), | |
1147 | quirk->devid.vendor, quirk->devid.device, | |
1148 | quirk->devid.subvendor, | |
1149 | quirk->devid.subdevice); | |
1150 | ||
1151 | dev_data = pci_get_drvdata(quirk->pdev); | |
1152 | ||
1153 | list_for_each_entry(cfg_entry, &dev_data->config_fields, list) { | |
1154 | field = cfg_entry->field; | |
1155 | if (count >= PAGE_SIZE) | |
1156 | goto out; | |
1157 | ||
1158 | count += scnprintf(buf + count, PAGE_SIZE - count, | |
1159 | "\t\t%08x:%01x:%08x\n", | |
1160 | cfg_entry->base_offset + | |
1161 | field->offset, field->size, | |
1162 | field->mask); | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | out: | |
1167 | spin_unlock_irqrestore(&device_ids_lock, flags); | |
1168 | ||
1169 | return count; | |
1170 | } | |
402c5e15 JB |
1171 | static DRIVER_ATTR(quirks, S_IRUSR | S_IWUSR, pcistub_quirk_show, |
1172 | pcistub_quirk_add); | |
30edc14b KRW |
1173 | |
1174 | static ssize_t permissive_add(struct device_driver *drv, const char *buf, | |
1175 | size_t count) | |
1176 | { | |
1177 | int domain, bus, slot, func; | |
1178 | int err; | |
1179 | struct pcistub_device *psdev; | |
a92336a1 | 1180 | struct xen_pcibk_dev_data *dev_data; |
30edc14b KRW |
1181 | err = str_to_slot(buf, &domain, &bus, &slot, &func); |
1182 | if (err) | |
1183 | goto out; | |
1184 | psdev = pcistub_device_find(domain, bus, slot, func); | |
1185 | if (!psdev) { | |
1186 | err = -ENODEV; | |
1187 | goto out; | |
1188 | } | |
1189 | if (!psdev->dev) { | |
1190 | err = -ENODEV; | |
1191 | goto release; | |
1192 | } | |
1193 | dev_data = pci_get_drvdata(psdev->dev); | |
1194 | /* the driver data for a device should never be null at this point */ | |
1195 | if (!dev_data) { | |
1196 | err = -ENXIO; | |
1197 | goto release; | |
1198 | } | |
1199 | if (!dev_data->permissive) { | |
1200 | dev_data->permissive = 1; | |
1201 | /* Let user know that what they're doing could be unsafe */ | |
1202 | dev_warn(&psdev->dev->dev, "enabling permissive mode " | |
1203 | "configuration space accesses!\n"); | |
1204 | dev_warn(&psdev->dev->dev, | |
1205 | "permissive mode is potentially unsafe!\n"); | |
1206 | } | |
1207 | release: | |
1208 | pcistub_device_put(psdev); | |
1209 | out: | |
1210 | if (!err) | |
1211 | err = count; | |
1212 | return err; | |
1213 | } | |
1214 | ||
1215 | static ssize_t permissive_show(struct device_driver *drv, char *buf) | |
1216 | { | |
1217 | struct pcistub_device *psdev; | |
a92336a1 | 1218 | struct xen_pcibk_dev_data *dev_data; |
30edc14b KRW |
1219 | size_t count = 0; |
1220 | unsigned long flags; | |
1221 | spin_lock_irqsave(&pcistub_devices_lock, flags); | |
1222 | list_for_each_entry(psdev, &pcistub_devices, dev_list) { | |
1223 | if (count >= PAGE_SIZE) | |
1224 | break; | |
1225 | if (!psdev->dev) | |
1226 | continue; | |
1227 | dev_data = pci_get_drvdata(psdev->dev); | |
1228 | if (!dev_data || !dev_data->permissive) | |
1229 | continue; | |
1230 | count += | |
1231 | scnprintf(buf + count, PAGE_SIZE - count, "%s\n", | |
1232 | pci_name(psdev->dev)); | |
1233 | } | |
1234 | spin_unlock_irqrestore(&pcistub_devices_lock, flags); | |
1235 | return count; | |
1236 | } | |
402c5e15 JB |
1237 | static DRIVER_ATTR(permissive, S_IRUSR | S_IWUSR, permissive_show, |
1238 | permissive_add); | |
30edc14b KRW |
1239 | |
1240 | static void pcistub_exit(void) | |
1241 | { | |
a92336a1 KRW |
1242 | driver_remove_file(&xen_pcibk_pci_driver.driver, &driver_attr_new_slot); |
1243 | driver_remove_file(&xen_pcibk_pci_driver.driver, | |
30edc14b | 1244 | &driver_attr_remove_slot); |
a92336a1 KRW |
1245 | driver_remove_file(&xen_pcibk_pci_driver.driver, &driver_attr_slots); |
1246 | driver_remove_file(&xen_pcibk_pci_driver.driver, &driver_attr_quirks); | |
1247 | driver_remove_file(&xen_pcibk_pci_driver.driver, | |
1248 | &driver_attr_permissive); | |
1249 | driver_remove_file(&xen_pcibk_pci_driver.driver, | |
0513fe9e | 1250 | &driver_attr_irq_handlers); |
a92336a1 | 1251 | driver_remove_file(&xen_pcibk_pci_driver.driver, |
0513fe9e | 1252 | &driver_attr_irq_handler_state); |
a92336a1 | 1253 | pci_unregister_driver(&xen_pcibk_pci_driver); |
30edc14b KRW |
1254 | } |
1255 | ||
1256 | static int __init pcistub_init(void) | |
1257 | { | |
1258 | int pos = 0; | |
1259 | int err = 0; | |
1260 | int domain, bus, slot, func; | |
1261 | int parsed; | |
1262 | ||
1263 | if (pci_devs_to_hide && *pci_devs_to_hide) { | |
1264 | do { | |
1265 | parsed = 0; | |
1266 | ||
1267 | err = sscanf(pci_devs_to_hide + pos, | |
1268 | " (%x:%x:%x.%x) %n", | |
1269 | &domain, &bus, &slot, &func, &parsed); | |
1270 | if (err != 4) { | |
1271 | domain = 0; | |
1272 | err = sscanf(pci_devs_to_hide + pos, | |
1273 | " (%x:%x.%x) %n", | |
1274 | &bus, &slot, &func, &parsed); | |
1275 | if (err != 3) | |
1276 | goto parse_error; | |
1277 | } | |
1278 | ||
1279 | err = pcistub_device_id_add(domain, bus, slot, func); | |
1280 | if (err) | |
1281 | goto out; | |
1282 | ||
1283 | /* if parsed<=0, we've reached the end of the string */ | |
1284 | pos += parsed; | |
1285 | } while (parsed > 0 && pci_devs_to_hide[pos]); | |
1286 | } | |
1287 | ||
1288 | /* If we're the first PCI Device Driver to register, we're the | |
1289 | * first one to get offered PCI devices as they become | |
1290 | * available (and thus we can be the first to grab them) | |
1291 | */ | |
a92336a1 | 1292 | err = pci_register_driver(&xen_pcibk_pci_driver); |
30edc14b KRW |
1293 | if (err < 0) |
1294 | goto out; | |
1295 | ||
a92336a1 | 1296 | err = driver_create_file(&xen_pcibk_pci_driver.driver, |
30edc14b KRW |
1297 | &driver_attr_new_slot); |
1298 | if (!err) | |
a92336a1 | 1299 | err = driver_create_file(&xen_pcibk_pci_driver.driver, |
30edc14b KRW |
1300 | &driver_attr_remove_slot); |
1301 | if (!err) | |
a92336a1 | 1302 | err = driver_create_file(&xen_pcibk_pci_driver.driver, |
30edc14b KRW |
1303 | &driver_attr_slots); |
1304 | if (!err) | |
a92336a1 | 1305 | err = driver_create_file(&xen_pcibk_pci_driver.driver, |
30edc14b KRW |
1306 | &driver_attr_quirks); |
1307 | if (!err) | |
a92336a1 | 1308 | err = driver_create_file(&xen_pcibk_pci_driver.driver, |
30edc14b KRW |
1309 | &driver_attr_permissive); |
1310 | ||
0513fe9e | 1311 | if (!err) |
a92336a1 | 1312 | err = driver_create_file(&xen_pcibk_pci_driver.driver, |
0513fe9e KRW |
1313 | &driver_attr_irq_handlers); |
1314 | if (!err) | |
a92336a1 | 1315 | err = driver_create_file(&xen_pcibk_pci_driver.driver, |
0513fe9e | 1316 | &driver_attr_irq_handler_state); |
30edc14b KRW |
1317 | if (err) |
1318 | pcistub_exit(); | |
1319 | ||
1320 | out: | |
1321 | return err; | |
1322 | ||
1323 | parse_error: | |
a92336a1 | 1324 | printk(KERN_ERR DRV_NAME ": Error parsing pci_devs_to_hide at \"%s\"\n", |
30edc14b KRW |
1325 | pci_devs_to_hide + pos); |
1326 | return -EINVAL; | |
1327 | } | |
1328 | ||
1329 | #ifndef MODULE | |
1330 | /* | |
1331 | * fs_initcall happens before device_initcall | |
a92336a1 | 1332 | * so xen_pcibk *should* get called first (b/c we |
30edc14b KRW |
1333 | * want to suck up any device before other drivers |
1334 | * get a chance by being the first pci device | |
1335 | * driver to register) | |
1336 | */ | |
1337 | fs_initcall(pcistub_init); | |
1338 | #endif | |
1339 | ||
a92336a1 | 1340 | static int __init xen_pcibk_init(void) |
30edc14b KRW |
1341 | { |
1342 | int err; | |
1343 | ||
1344 | if (!xen_initial_domain()) | |
1345 | return -ENODEV; | |
1346 | ||
a92336a1 | 1347 | err = xen_pcibk_config_init(); |
30edc14b KRW |
1348 | if (err) |
1349 | return err; | |
1350 | ||
1351 | #ifdef MODULE | |
1352 | err = pcistub_init(); | |
1353 | if (err < 0) | |
1354 | return err; | |
1355 | #endif | |
1356 | ||
1357 | pcistub_init_devices_late(); | |
a92336a1 | 1358 | err = xen_pcibk_xenbus_register(); |
30edc14b KRW |
1359 | if (err) |
1360 | pcistub_exit(); | |
1361 | ||
1362 | return err; | |
1363 | } | |
1364 | ||
a92336a1 | 1365 | static void __exit xen_pcibk_cleanup(void) |
30edc14b | 1366 | { |
a92336a1 | 1367 | xen_pcibk_xenbus_unregister(); |
30edc14b KRW |
1368 | pcistub_exit(); |
1369 | } | |
1370 | ||
a92336a1 KRW |
1371 | module_init(xen_pcibk_init); |
1372 | module_exit(xen_pcibk_cleanup); | |
30edc14b KRW |
1373 | |
1374 | MODULE_LICENSE("Dual BSD/GPL"); | |
402c5e15 | 1375 | MODULE_ALIAS("xen-backend:pci"); |