Commit | Line | Data |
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8cfab3cf | 1 | // SPDX-License-Identifier: GPL-2.0 |
9b41d19a | 2 | /* |
5e8cb403 KVA |
3 | * PCI Endpoint *Function* (EPF) library |
4 | * | |
5 | * Copyright (C) 2017 Texas Instruments | |
6 | * Author: Kishon Vijay Abraham I <kishon@ti.com> | |
5e8cb403 KVA |
7 | */ |
8 | ||
9 | #include <linux/device.h> | |
10 | #include <linux/dma-mapping.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/module.h> | |
13 | ||
14 | #include <linux/pci-epc.h> | |
15 | #include <linux/pci-epf.h> | |
3a401a2c | 16 | #include <linux/pci-ep-cfs.h> |
5e8cb403 | 17 | |
ef1433f7 KVA |
18 | static DEFINE_MUTEX(pci_epf_mutex); |
19 | ||
b91da730 | 20 | static const struct bus_type pci_epf_bus_type; |
36b85189 | 21 | static const struct device_type pci_epf_type; |
5e8cb403 | 22 | |
5e8cb403 KVA |
23 | /** |
24 | * pci_epf_unbind() - Notify the function driver that the binding between the | |
25 | * EPF device and EPC device has been lost | |
26 | * @epf: the EPF device which has lost the binding with the EPC device | |
27 | * | |
28 | * Invoke to notify the function driver that the binding between the EPF device | |
29 | * and EPC device has been lost. | |
30 | */ | |
31 | void pci_epf_unbind(struct pci_epf *epf) | |
32 | { | |
1cf362e9 KVA |
33 | struct pci_epf *epf_vf; |
34 | ||
5e8cb403 KVA |
35 | if (!epf->driver) { |
36 | dev_WARN(&epf->dev, "epf device not bound to driver\n"); | |
37 | return; | |
38 | } | |
39 | ||
07301c98 | 40 | mutex_lock(&epf->lock); |
1cf362e9 KVA |
41 | list_for_each_entry(epf_vf, &epf->pci_vepf, list) { |
42 | if (epf_vf->is_bound) | |
43 | epf_vf->driver->ops->unbind(epf_vf); | |
44 | } | |
45 | if (epf->is_bound) | |
46 | epf->driver->ops->unbind(epf); | |
07301c98 | 47 | mutex_unlock(&epf->lock); |
5e8cb403 KVA |
48 | module_put(epf->driver->owner); |
49 | } | |
50 | EXPORT_SYMBOL_GPL(pci_epf_unbind); | |
51 | ||
52 | /** | |
53 | * pci_epf_bind() - Notify the function driver that the EPF device has been | |
54 | * bound to a EPC device | |
55 | * @epf: the EPF device which has been bound to the EPC device | |
56 | * | |
57 | * Invoke to notify the function driver that it has been bound to a EPC device | |
58 | */ | |
59 | int pci_epf_bind(struct pci_epf *epf) | |
60 | { | |
53fd3cbe | 61 | struct device *dev = &epf->dev; |
1cf362e9 | 62 | struct pci_epf *epf_vf; |
53fd3cbe KVA |
63 | u8 func_no, vfunc_no; |
64 | struct pci_epc *epc; | |
07301c98 KVA |
65 | int ret; |
66 | ||
5e8cb403 | 67 | if (!epf->driver) { |
53fd3cbe | 68 | dev_WARN(dev, "epf device not bound to driver\n"); |
5e8cb403 KVA |
69 | return -EINVAL; |
70 | } | |
71 | ||
72 | if (!try_module_get(epf->driver->owner)) | |
73 | return -EAGAIN; | |
74 | ||
07301c98 | 75 | mutex_lock(&epf->lock); |
1cf362e9 | 76 | list_for_each_entry(epf_vf, &epf->pci_vepf, list) { |
53fd3cbe KVA |
77 | vfunc_no = epf_vf->vfunc_no; |
78 | ||
79 | if (vfunc_no < 1) { | |
80 | dev_err(dev, "Invalid virtual function number\n"); | |
81 | ret = -EINVAL; | |
82 | goto ret; | |
83 | } | |
84 | ||
85 | epc = epf->epc; | |
86 | func_no = epf->func_no; | |
87 | if (!IS_ERR_OR_NULL(epc)) { | |
88 | if (!epc->max_vfs) { | |
89 | dev_err(dev, "No support for virt function\n"); | |
90 | ret = -EINVAL; | |
91 | goto ret; | |
92 | } | |
93 | ||
94 | if (vfunc_no > epc->max_vfs[func_no]) { | |
95 | dev_err(dev, "PF%d: Exceeds max vfunc number\n", | |
96 | func_no); | |
97 | ret = -EINVAL; | |
98 | goto ret; | |
99 | } | |
100 | } | |
101 | ||
102 | epc = epf->sec_epc; | |
103 | func_no = epf->sec_epc_func_no; | |
104 | if (!IS_ERR_OR_NULL(epc)) { | |
105 | if (!epc->max_vfs) { | |
106 | dev_err(dev, "No support for virt function\n"); | |
107 | ret = -EINVAL; | |
108 | goto ret; | |
109 | } | |
110 | ||
111 | if (vfunc_no > epc->max_vfs[func_no]) { | |
112 | dev_err(dev, "PF%d: Exceeds max vfunc number\n", | |
113 | func_no); | |
114 | ret = -EINVAL; | |
115 | goto ret; | |
116 | } | |
117 | } | |
118 | ||
1cf362e9 | 119 | epf_vf->func_no = epf->func_no; |
53fd3cbe | 120 | epf_vf->sec_epc_func_no = epf->sec_epc_func_no; |
1cf362e9 KVA |
121 | epf_vf->epc = epf->epc; |
122 | epf_vf->sec_epc = epf->sec_epc; | |
123 | ret = epf_vf->driver->ops->bind(epf_vf); | |
124 | if (ret) | |
125 | goto ret; | |
126 | epf_vf->is_bound = true; | |
127 | } | |
128 | ||
07301c98 | 129 | ret = epf->driver->ops->bind(epf); |
1cf362e9 KVA |
130 | if (ret) |
131 | goto ret; | |
132 | epf->is_bound = true; | |
133 | ||
134 | mutex_unlock(&epf->lock); | |
135 | return 0; | |
136 | ||
137 | ret: | |
07301c98 | 138 | mutex_unlock(&epf->lock); |
1cf362e9 | 139 | pci_epf_unbind(epf); |
07301c98 KVA |
140 | |
141 | return ret; | |
5e8cb403 KVA |
142 | } |
143 | EXPORT_SYMBOL_GPL(pci_epf_bind); | |
144 | ||
1cf362e9 KVA |
145 | /** |
146 | * pci_epf_add_vepf() - associate virtual EP function to physical EP function | |
147 | * @epf_pf: the physical EP function to which the virtual EP function should be | |
148 | * associated | |
149 | * @epf_vf: the virtual EP function to be added | |
150 | * | |
151 | * A physical endpoint function can be associated with multiple virtual | |
152 | * endpoint functions. Invoke pci_epf_add_epf() to add a virtual PCI endpoint | |
153 | * function to a physical PCI endpoint function. | |
154 | */ | |
155 | int pci_epf_add_vepf(struct pci_epf *epf_pf, struct pci_epf *epf_vf) | |
156 | { | |
157 | u32 vfunc_no; | |
158 | ||
159 | if (IS_ERR_OR_NULL(epf_pf) || IS_ERR_OR_NULL(epf_vf)) | |
160 | return -EINVAL; | |
161 | ||
162 | if (epf_pf->epc || epf_vf->epc || epf_vf->epf_pf) | |
163 | return -EBUSY; | |
164 | ||
165 | if (epf_pf->sec_epc || epf_vf->sec_epc) | |
166 | return -EBUSY; | |
167 | ||
168 | mutex_lock(&epf_pf->lock); | |
169 | vfunc_no = find_first_zero_bit(&epf_pf->vfunction_num_map, | |
170 | BITS_PER_LONG); | |
171 | if (vfunc_no >= BITS_PER_LONG) { | |
172 | mutex_unlock(&epf_pf->lock); | |
173 | return -EINVAL; | |
174 | } | |
175 | ||
176 | set_bit(vfunc_no, &epf_pf->vfunction_num_map); | |
177 | epf_vf->vfunc_no = vfunc_no; | |
178 | ||
179 | epf_vf->epf_pf = epf_pf; | |
180 | epf_vf->is_vf = true; | |
181 | ||
182 | list_add_tail(&epf_vf->list, &epf_pf->pci_vepf); | |
183 | mutex_unlock(&epf_pf->lock); | |
184 | ||
185 | return 0; | |
186 | } | |
187 | EXPORT_SYMBOL_GPL(pci_epf_add_vepf); | |
188 | ||
189 | /** | |
190 | * pci_epf_remove_vepf() - remove virtual EP function from physical EP function | |
191 | * @epf_pf: the physical EP function from which the virtual EP function should | |
192 | * be removed | |
193 | * @epf_vf: the virtual EP function to be removed | |
194 | * | |
b2105b9f | 195 | * Invoke to remove a virtual endpoint function from the physical endpoint |
1cf362e9 KVA |
196 | * function. |
197 | */ | |
198 | void pci_epf_remove_vepf(struct pci_epf *epf_pf, struct pci_epf *epf_vf) | |
199 | { | |
200 | if (IS_ERR_OR_NULL(epf_pf) || IS_ERR_OR_NULL(epf_vf)) | |
201 | return; | |
202 | ||
203 | mutex_lock(&epf_pf->lock); | |
204 | clear_bit(epf_vf->vfunc_no, &epf_pf->vfunction_num_map); | |
205 | list_del(&epf_vf->list); | |
206 | mutex_unlock(&epf_pf->lock); | |
207 | } | |
208 | EXPORT_SYMBOL_GPL(pci_epf_remove_vepf); | |
209 | ||
5e8cb403 KVA |
210 | /** |
211 | * pci_epf_free_space() - free the allocated PCI EPF register space | |
9b41d19a | 212 | * @epf: the EPF device from whom to free the memory |
5e8cb403 KVA |
213 | * @addr: the virtual address of the PCI EPF register space |
214 | * @bar: the BAR number corresponding to the register space | |
63840ff5 | 215 | * @type: Identifies if the allocated space is for primary EPC or secondary EPC |
5e8cb403 KVA |
216 | * |
217 | * Invoke to free the allocated PCI EPF register space. | |
218 | */ | |
63840ff5 KVA |
219 | void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar, |
220 | enum pci_epc_interface_type type) | |
5e8cb403 | 221 | { |
80c253bd | 222 | struct device *dev; |
63840ff5 KVA |
223 | struct pci_epf_bar *epf_bar; |
224 | struct pci_epc *epc; | |
5e8cb403 KVA |
225 | |
226 | if (!addr) | |
227 | return; | |
228 | ||
63840ff5 KVA |
229 | if (type == PRIMARY_INTERFACE) { |
230 | epc = epf->epc; | |
231 | epf_bar = epf->bar; | |
232 | } else { | |
233 | epc = epf->sec_epc; | |
234 | epf_bar = epf->sec_epc_bar; | |
235 | } | |
236 | ||
237 | dev = epc->dev.parent; | |
238 | dma_free_coherent(dev, epf_bar[bar].size, addr, | |
239 | epf_bar[bar].phys_addr); | |
5e8cb403 | 240 | |
63840ff5 KVA |
241 | epf_bar[bar].phys_addr = 0; |
242 | epf_bar[bar].addr = NULL; | |
243 | epf_bar[bar].size = 0; | |
244 | epf_bar[bar].barno = 0; | |
245 | epf_bar[bar].flags = 0; | |
5e8cb403 KVA |
246 | } |
247 | EXPORT_SYMBOL_GPL(pci_epf_free_space); | |
248 | ||
249 | /** | |
250 | * pci_epf_alloc_space() - allocate memory for the PCI EPF register space | |
9b41d19a | 251 | * @epf: the EPF device to whom allocate the memory |
5e8cb403 KVA |
252 | * @size: the size of the memory that has to be allocated |
253 | * @bar: the BAR number corresponding to the allocated register space | |
e891becd | 254 | * @epc_features: the features provided by the EPC specific to this EPF |
63840ff5 | 255 | * @type: Identifies if the allocation is for primary EPC or secondary EPC |
5e8cb403 KVA |
256 | * |
257 | * Invoke to allocate memory for the PCI EPF register space. | |
29a025b6 NC |
258 | * Flag PCI_BASE_ADDRESS_MEM_TYPE_64 will automatically get set if the BAR |
259 | * can only be a 64-bit BAR, or if the requested size is larger than 2 GB. | |
5e8cb403 | 260 | */ |
2a9a8016 | 261 | void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar, |
e891becd NC |
262 | const struct pci_epc_features *epc_features, |
263 | enum pci_epc_interface_type type) | |
5e8cb403 | 264 | { |
e01c9797 | 265 | u64 bar_fixed_size = epc_features->bar[bar].fixed_size; |
e891becd | 266 | size_t align = epc_features->align; |
63840ff5 | 267 | struct pci_epf_bar *epf_bar; |
5e8cb403 | 268 | dma_addr_t phys_addr; |
63840ff5 KVA |
269 | struct pci_epc *epc; |
270 | struct device *dev; | |
271 | void *space; | |
5e8cb403 KVA |
272 | |
273 | if (size < 128) | |
274 | size = 128; | |
2a9a8016 | 275 | |
e01c9797 NC |
276 | if (epc_features->bar[bar].type == BAR_FIXED && bar_fixed_size) { |
277 | if (size > bar_fixed_size) { | |
278 | dev_err(&epf->dev, | |
279 | "requested BAR size is larger than fixed size\n"); | |
280 | return NULL; | |
281 | } | |
84b51a6b | 282 | size = bar_fixed_size; |
e01c9797 | 283 | } |
84b51a6b | 284 | |
2a9a8016 KVA |
285 | if (align) |
286 | size = ALIGN(size, align); | |
287 | else | |
288 | size = roundup_pow_of_two(size); | |
5e8cb403 | 289 | |
63840ff5 KVA |
290 | if (type == PRIMARY_INTERFACE) { |
291 | epc = epf->epc; | |
292 | epf_bar = epf->bar; | |
293 | } else { | |
294 | epc = epf->sec_epc; | |
295 | epf_bar = epf->sec_epc_bar; | |
296 | } | |
297 | ||
298 | dev = epc->dev.parent; | |
5e8cb403 KVA |
299 | space = dma_alloc_coherent(dev, size, &phys_addr, GFP_KERNEL); |
300 | if (!space) { | |
301 | dev_err(dev, "failed to allocate mem space\n"); | |
302 | return NULL; | |
303 | } | |
304 | ||
63840ff5 KVA |
305 | epf_bar[bar].phys_addr = phys_addr; |
306 | epf_bar[bar].addr = space; | |
307 | epf_bar[bar].size = size; | |
308 | epf_bar[bar].barno = bar; | |
29a025b6 NC |
309 | if (upper_32_bits(size) || epc_features->bar[bar].only_64bit) |
310 | epf_bar[bar].flags |= PCI_BASE_ADDRESS_MEM_TYPE_64; | |
311 | else | |
312 | epf_bar[bar].flags |= PCI_BASE_ADDRESS_MEM_TYPE_32; | |
5e8cb403 KVA |
313 | |
314 | return space; | |
315 | } | |
316 | EXPORT_SYMBOL_GPL(pci_epf_alloc_space); | |
317 | ||
a83a2173 | 318 | static void pci_epf_remove_cfs(struct pci_epf_driver *driver) |
5e8cb403 | 319 | { |
fb0de5b8 | 320 | struct config_group *group, *tmp; |
ef1433f7 | 321 | |
a83a2173 KVA |
322 | if (!IS_ENABLED(CONFIG_PCI_ENDPOINT_CONFIGFS)) |
323 | return; | |
324 | ||
ef1433f7 | 325 | mutex_lock(&pci_epf_mutex); |
fb0de5b8 | 326 | list_for_each_entry_safe(group, tmp, &driver->epf_group, group_entry) |
ef1433f7 KVA |
327 | pci_ep_cfs_remove_epf_group(group); |
328 | list_del(&driver->epf_group); | |
329 | mutex_unlock(&pci_epf_mutex); | |
a83a2173 KVA |
330 | } |
331 | ||
332 | /** | |
333 | * pci_epf_unregister_driver() - unregister the PCI EPF driver | |
334 | * @driver: the PCI EPF driver that has to be unregistered | |
335 | * | |
336 | * Invoke to unregister the PCI EPF driver. | |
337 | */ | |
338 | void pci_epf_unregister_driver(struct pci_epf_driver *driver) | |
339 | { | |
340 | pci_epf_remove_cfs(driver); | |
5e8cb403 KVA |
341 | driver_unregister(&driver->driver); |
342 | } | |
343 | EXPORT_SYMBOL_GPL(pci_epf_unregister_driver); | |
344 | ||
a83a2173 KVA |
345 | static int pci_epf_add_cfs(struct pci_epf_driver *driver) |
346 | { | |
347 | struct config_group *group; | |
348 | const struct pci_epf_device_id *id; | |
349 | ||
350 | if (!IS_ENABLED(CONFIG_PCI_ENDPOINT_CONFIGFS)) | |
351 | return 0; | |
352 | ||
353 | INIT_LIST_HEAD(&driver->epf_group); | |
354 | ||
355 | id = driver->id_table; | |
356 | while (id->name[0]) { | |
357 | group = pci_ep_cfs_add_epf_group(id->name); | |
358 | if (IS_ERR(group)) { | |
359 | pci_epf_remove_cfs(driver); | |
360 | return PTR_ERR(group); | |
361 | } | |
362 | ||
363 | mutex_lock(&pci_epf_mutex); | |
364 | list_add_tail(&group->group_entry, &driver->epf_group); | |
365 | mutex_unlock(&pci_epf_mutex); | |
366 | id++; | |
367 | } | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
5e8cb403 KVA |
372 | /** |
373 | * __pci_epf_register_driver() - register a new PCI EPF driver | |
374 | * @driver: structure representing PCI EPF driver | |
375 | * @owner: the owner of the module that registers the PCI EPF driver | |
376 | * | |
377 | * Invoke to register a new PCI EPF driver. | |
378 | */ | |
379 | int __pci_epf_register_driver(struct pci_epf_driver *driver, | |
380 | struct module *owner) | |
381 | { | |
382 | int ret; | |
383 | ||
384 | if (!driver->ops) | |
385 | return -EINVAL; | |
386 | ||
5779dd0a | 387 | if (!driver->ops->bind || !driver->ops->unbind) |
5e8cb403 KVA |
388 | return -EINVAL; |
389 | ||
390 | driver->driver.bus = &pci_epf_bus_type; | |
391 | driver->driver.owner = owner; | |
392 | ||
393 | ret = driver_register(&driver->driver); | |
394 | if (ret) | |
395 | return ret; | |
396 | ||
a83a2173 | 397 | pci_epf_add_cfs(driver); |
3a401a2c | 398 | |
5e8cb403 KVA |
399 | return 0; |
400 | } | |
401 | EXPORT_SYMBOL_GPL(__pci_epf_register_driver); | |
402 | ||
403 | /** | |
404 | * pci_epf_destroy() - destroy the created PCI EPF device | |
405 | * @epf: the PCI EPF device that has to be destroyed. | |
406 | * | |
407 | * Invoke to destroy the PCI EPF device created by invoking pci_epf_create(). | |
408 | */ | |
409 | void pci_epf_destroy(struct pci_epf *epf) | |
410 | { | |
411 | device_unregister(&epf->dev); | |
412 | } | |
413 | EXPORT_SYMBOL_GPL(pci_epf_destroy); | |
414 | ||
415 | /** | |
416 | * pci_epf_create() - create a new PCI EPF device | |
417 | * @name: the name of the PCI EPF device. This name will be used to bind the | |
b2105b9f | 418 | * EPF device to a EPF driver |
5e8cb403 KVA |
419 | * |
420 | * Invoke to create a new PCI EPF device by providing the name of the function | |
421 | * device. | |
422 | */ | |
423 | struct pci_epf *pci_epf_create(const char *name) | |
424 | { | |
425 | int ret; | |
426 | struct pci_epf *epf; | |
427 | struct device *dev; | |
36cc14ac | 428 | int len; |
5e8cb403 KVA |
429 | |
430 | epf = kzalloc(sizeof(*epf), GFP_KERNEL); | |
50ee1061 REF |
431 | if (!epf) |
432 | return ERR_PTR(-ENOMEM); | |
5e8cb403 | 433 | |
36cc14ac REF |
434 | len = strchrnul(name, '.') - name; |
435 | epf->name = kstrndup(name, len, GFP_KERNEL); | |
5e8cb403 | 436 | if (!epf->name) { |
50ee1061 REF |
437 | kfree(epf); |
438 | return ERR_PTR(-ENOMEM); | |
5e8cb403 KVA |
439 | } |
440 | ||
1cf362e9 KVA |
441 | /* VFs are numbered starting with 1. So set BIT(0) by default */ |
442 | epf->vfunction_num_map = 1; | |
443 | INIT_LIST_HEAD(&epf->pci_vepf); | |
444 | ||
5e8cb403 KVA |
445 | dev = &epf->dev; |
446 | device_initialize(dev); | |
447 | dev->bus = &pci_epf_bus_type; | |
448 | dev->type = &pci_epf_type; | |
07301c98 | 449 | mutex_init(&epf->lock); |
5e8cb403 KVA |
450 | |
451 | ret = dev_set_name(dev, "%s", name); | |
50ee1061 REF |
452 | if (ret) { |
453 | put_device(dev); | |
454 | return ERR_PTR(ret); | |
455 | } | |
5e8cb403 KVA |
456 | |
457 | ret = device_add(dev); | |
50ee1061 REF |
458 | if (ret) { |
459 | put_device(dev); | |
460 | return ERR_PTR(ret); | |
461 | } | |
5e8cb403 | 462 | |
5e8cb403 | 463 | return epf; |
5e8cb403 KVA |
464 | } |
465 | EXPORT_SYMBOL_GPL(pci_epf_create); | |
466 | ||
467 | static void pci_epf_dev_release(struct device *dev) | |
468 | { | |
469 | struct pci_epf *epf = to_pci_epf(dev); | |
470 | ||
471 | kfree(epf->name); | |
472 | kfree(epf); | |
473 | } | |
474 | ||
36b85189 | 475 | static const struct device_type pci_epf_type = { |
5e8cb403 KVA |
476 | .release = pci_epf_dev_release, |
477 | }; | |
478 | ||
081c715d | 479 | static const struct pci_epf_device_id * |
5e8cb403 KVA |
480 | pci_epf_match_id(const struct pci_epf_device_id *id, const struct pci_epf *epf) |
481 | { | |
482 | while (id->name[0]) { | |
483 | if (strcmp(epf->name, id->name) == 0) | |
081c715d | 484 | return id; |
5e8cb403 KVA |
485 | id++; |
486 | } | |
487 | ||
081c715d | 488 | return NULL; |
5e8cb403 KVA |
489 | } |
490 | ||
491 | static int pci_epf_device_match(struct device *dev, struct device_driver *drv) | |
492 | { | |
493 | struct pci_epf *epf = to_pci_epf(dev); | |
494 | struct pci_epf_driver *driver = to_pci_epf_driver(drv); | |
495 | ||
496 | if (driver->id_table) | |
081c715d | 497 | return !!pci_epf_match_id(driver->id_table, epf); |
5e8cb403 KVA |
498 | |
499 | return !strcmp(epf->name, drv->name); | |
500 | } | |
501 | ||
502 | static int pci_epf_device_probe(struct device *dev) | |
503 | { | |
504 | struct pci_epf *epf = to_pci_epf(dev); | |
505 | struct pci_epf_driver *driver = to_pci_epf_driver(dev->driver); | |
506 | ||
507 | if (!driver->probe) | |
508 | return -ENODEV; | |
509 | ||
510 | epf->driver = driver; | |
511 | ||
081c715d | 512 | return driver->probe(epf, pci_epf_match_id(driver->id_table, epf)); |
5e8cb403 KVA |
513 | } |
514 | ||
fc7a6209 | 515 | static void pci_epf_device_remove(struct device *dev) |
5e8cb403 | 516 | { |
5e8cb403 KVA |
517 | struct pci_epf *epf = to_pci_epf(dev); |
518 | struct pci_epf_driver *driver = to_pci_epf_driver(dev->driver); | |
519 | ||
28daeff6 | 520 | if (driver->remove) |
dde0a318 | 521 | driver->remove(epf); |
5e8cb403 | 522 | epf->driver = NULL; |
5e8cb403 KVA |
523 | } |
524 | ||
b91da730 | 525 | static const struct bus_type pci_epf_bus_type = { |
5e8cb403 KVA |
526 | .name = "pci-epf", |
527 | .match = pci_epf_device_match, | |
528 | .probe = pci_epf_device_probe, | |
529 | .remove = pci_epf_device_remove, | |
530 | }; | |
531 | ||
532 | static int __init pci_epf_init(void) | |
533 | { | |
534 | int ret; | |
535 | ||
536 | ret = bus_register(&pci_epf_bus_type); | |
537 | if (ret) { | |
538 | pr_err("failed to register pci epf bus --> %d\n", ret); | |
539 | return ret; | |
540 | } | |
541 | ||
542 | return 0; | |
543 | } | |
544 | module_init(pci_epf_init); | |
545 | ||
546 | static void __exit pci_epf_exit(void) | |
547 | { | |
548 | bus_unregister(&pci_epf_bus_type); | |
549 | } | |
550 | module_exit(pci_epf_exit); | |
551 | ||
552 | MODULE_DESCRIPTION("PCI EPF Library"); | |
553 | MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>"); |