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Commit | Line | Data |
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394b701c MP |
1 | /* |
2 | * RapidIO interconnect services | |
3 | * (RapidIO Interconnect Specification, http://www.rapidio.org) | |
4 | * | |
5 | * Copyright 2005 MontaVista Software, Inc. | |
6 | * Matt Porter <mporter@kernel.crashing.org> | |
7 | * | |
fdf90abc | 8 | * Copyright 2009 - 2013 Integrated Device Technology, Inc. |
e5cabeb3 | 9 | * Alex Bounine <alexandre.bounine@idt.com> |
e5cabeb3 | 10 | * |
394b701c MP |
11 | * This program is free software; you can redistribute it and/or modify it |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | */ | |
16 | ||
394b701c MP |
17 | #include <linux/types.h> |
18 | #include <linux/kernel.h> | |
19 | ||
20 | #include <linux/delay.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/rio.h> | |
23 | #include <linux/rio_drv.h> | |
24 | #include <linux/rio_ids.h> | |
25 | #include <linux/rio_regs.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/spinlock.h> | |
de25968c | 28 | #include <linux/slab.h> |
5febf1cd | 29 | #include <linux/interrupt.h> |
394b701c MP |
30 | |
31 | #include "rio.h" | |
32 | ||
fdf90abc AB |
33 | MODULE_DESCRIPTION("RapidIO Subsystem Core"); |
34 | MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>"); | |
35 | MODULE_AUTHOR("Alexandre Bounine <alexandre.bounine@idt.com>"); | |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
38 | static int hdid[RIO_MAX_MPORTS]; | |
39 | static int ids_num; | |
40 | module_param_array(hdid, int, &ids_num, 0); | |
41 | MODULE_PARM_DESC(hdid, | |
42 | "Destination ID assignment to local RapidIO controllers"); | |
43 | ||
a11650e1 | 44 | static LIST_HEAD(rio_devices); |
e6b585ca | 45 | static LIST_HEAD(rio_nets); |
a11650e1 AB |
46 | static DEFINE_SPINLOCK(rio_global_list_lock); |
47 | ||
394b701c | 48 | static LIST_HEAD(rio_mports); |
9edbc30b | 49 | static LIST_HEAD(rio_scans); |
a11650e1 | 50 | static DEFINE_MUTEX(rio_mport_list_lock); |
569fccb6 | 51 | static unsigned char next_portid; |
da1589f0 | 52 | static DEFINE_SPINLOCK(rio_mmap_lock); |
394b701c MP |
53 | |
54 | /** | |
55 | * rio_local_get_device_id - Get the base/extended device id for a port | |
56 | * @port: RIO master port from which to get the deviceid | |
57 | * | |
58 | * Reads the base/extended device id from the local device | |
59 | * implementing the master port. Returns the 8/16-bit device | |
60 | * id. | |
61 | */ | |
62 | u16 rio_local_get_device_id(struct rio_mport *port) | |
63 | { | |
64 | u32 result; | |
65 | ||
66 | rio_local_read_config_32(port, RIO_DID_CSR, &result); | |
67 | ||
e0423236 | 68 | return (RIO_GET_DID(port->sys_size, result)); |
394b701c MP |
69 | } |
70 | ||
8b189fdb AB |
71 | /** |
72 | * rio_query_mport - Query mport device attributes | |
73 | * @port: mport device to query | |
74 | * @mport_attr: mport attributes data structure | |
75 | * | |
76 | * Returns attributes of specified mport through the | |
77 | * pointer to attributes data structure. | |
78 | */ | |
79 | int rio_query_mport(struct rio_mport *port, | |
80 | struct rio_mport_attr *mport_attr) | |
81 | { | |
82 | if (!port->ops->query_mport) | |
83 | return -ENODATA; | |
84 | return port->ops->query_mport(port, mport_attr); | |
85 | } | |
86 | EXPORT_SYMBOL(rio_query_mport); | |
87 | ||
e6b585ca AB |
88 | /** |
89 | * rio_alloc_net- Allocate and initialize a new RIO network data structure | |
90 | * @mport: Master port associated with the RIO network | |
91 | * | |
92 | * Allocates a RIO network structure, initializes per-network | |
93 | * list heads, and adds the associated master port to the | |
94 | * network list of associated master ports. Returns a | |
95 | * RIO network pointer on success or %NULL on failure. | |
96 | */ | |
97 | struct rio_net *rio_alloc_net(struct rio_mport *mport) | |
98 | { | |
99 | struct rio_net *net; | |
100 | ||
101 | net = kzalloc(sizeof(struct rio_net), GFP_KERNEL); | |
102 | if (net) { | |
103 | INIT_LIST_HEAD(&net->node); | |
104 | INIT_LIST_HEAD(&net->devices); | |
105 | INIT_LIST_HEAD(&net->switches); | |
106 | INIT_LIST_HEAD(&net->mports); | |
107 | mport->net = net; | |
108 | } | |
109 | return net; | |
110 | } | |
111 | EXPORT_SYMBOL_GPL(rio_alloc_net); | |
112 | ||
113 | int rio_add_net(struct rio_net *net) | |
114 | { | |
115 | int err; | |
116 | ||
117 | err = device_register(&net->dev); | |
118 | if (err) | |
119 | return err; | |
120 | spin_lock(&rio_global_list_lock); | |
121 | list_add_tail(&net->node, &rio_nets); | |
122 | spin_unlock(&rio_global_list_lock); | |
123 | ||
124 | return 0; | |
125 | } | |
126 | EXPORT_SYMBOL_GPL(rio_add_net); | |
127 | ||
128 | void rio_free_net(struct rio_net *net) | |
129 | { | |
130 | spin_lock(&rio_global_list_lock); | |
131 | if (!list_empty(&net->node)) | |
132 | list_del(&net->node); | |
133 | spin_unlock(&rio_global_list_lock); | |
134 | if (net->release) | |
135 | net->release(net); | |
136 | device_unregister(&net->dev); | |
137 | } | |
138 | EXPORT_SYMBOL_GPL(rio_free_net); | |
139 | ||
5024622f AB |
140 | /** |
141 | * rio_local_set_device_id - Set the base/extended device id for a port | |
142 | * @port: RIO master port | |
143 | * @did: Device ID value to be written | |
144 | * | |
145 | * Writes the base/extended device id from a device. | |
146 | */ | |
147 | void rio_local_set_device_id(struct rio_mport *port, u16 did) | |
148 | { | |
149 | rio_local_write_config_32(port, RIO_DID_CSR, | |
150 | RIO_SET_DID(port->sys_size, did)); | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(rio_local_set_device_id); | |
153 | ||
a11650e1 AB |
154 | /** |
155 | * rio_add_device- Adds a RIO device to the device model | |
156 | * @rdev: RIO device | |
157 | * | |
158 | * Adds the RIO device to the global device list and adds the RIO | |
159 | * device to the RIO device list. Creates the generic sysfs nodes | |
160 | * for an RIO device. | |
161 | */ | |
162 | int rio_add_device(struct rio_dev *rdev) | |
163 | { | |
164 | int err; | |
165 | ||
b77a2030 | 166 | atomic_set(&rdev->state, RIO_DEVICE_RUNNING); |
b74ec56e | 167 | err = device_register(&rdev->dev); |
a11650e1 AB |
168 | if (err) |
169 | return err; | |
170 | ||
171 | spin_lock(&rio_global_list_lock); | |
172 | list_add_tail(&rdev->global_list, &rio_devices); | |
b74ec56e AB |
173 | if (rdev->net) { |
174 | list_add_tail(&rdev->net_list, &rdev->net->devices); | |
175 | if (rdev->pef & RIO_PEF_SWITCH) | |
176 | list_add_tail(&rdev->rswitch->node, | |
177 | &rdev->net->switches); | |
178 | } | |
a11650e1 AB |
179 | spin_unlock(&rio_global_list_lock); |
180 | ||
181 | rio_create_sysfs_dev_files(rdev); | |
182 | ||
183 | return 0; | |
184 | } | |
185 | EXPORT_SYMBOL_GPL(rio_add_device); | |
186 | ||
b74ec56e AB |
187 | /* |
188 | * rio_del_device - removes a RIO device from the device model | |
189 | * @rdev: RIO device | |
b77a2030 | 190 | * @state: device state to set during removal process |
b74ec56e AB |
191 | * |
192 | * Removes the RIO device to the kernel device list and subsystem's device list. | |
193 | * Clears sysfs entries for the removed device. | |
194 | */ | |
b77a2030 | 195 | void rio_del_device(struct rio_dev *rdev, enum rio_device_state state) |
b74ec56e AB |
196 | { |
197 | pr_debug("RIO: %s: removing %s\n", __func__, rio_name(rdev)); | |
b77a2030 | 198 | atomic_set(&rdev->state, state); |
b74ec56e AB |
199 | spin_lock(&rio_global_list_lock); |
200 | list_del(&rdev->global_list); | |
201 | if (rdev->net) { | |
202 | list_del(&rdev->net_list); | |
203 | if (rdev->pef & RIO_PEF_SWITCH) { | |
204 | list_del(&rdev->rswitch->node); | |
205 | kfree(rdev->rswitch->route_table); | |
206 | } | |
207 | } | |
208 | spin_unlock(&rio_global_list_lock); | |
209 | rio_remove_sysfs_dev_files(rdev); | |
210 | device_unregister(&rdev->dev); | |
211 | } | |
212 | EXPORT_SYMBOL_GPL(rio_del_device); | |
213 | ||
394b701c MP |
214 | /** |
215 | * rio_request_inb_mbox - request inbound mailbox service | |
216 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 217 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
218 | * @mbox: Mailbox number to claim |
219 | * @entries: Number of entries in inbound mailbox queue | |
220 | * @minb: Callback to execute when inbound message is received | |
221 | * | |
222 | * Requests ownership of an inbound mailbox resource and binds | |
223 | * a callback function to the resource. Returns %0 on success. | |
224 | */ | |
225 | int rio_request_inb_mbox(struct rio_mport *mport, | |
6978bbc0 | 226 | void *dev_id, |
394b701c MP |
227 | int mbox, |
228 | int entries, | |
6978bbc0 | 229 | void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, |
394b701c MP |
230 | int slot)) |
231 | { | |
f8f06269 AB |
232 | int rc = -ENOSYS; |
233 | struct resource *res; | |
394b701c | 234 | |
f8f06269 AB |
235 | if (mport->ops->open_inb_mbox == NULL) |
236 | goto out; | |
237 | ||
9a975bee | 238 | res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
394b701c MP |
239 | |
240 | if (res) { | |
241 | rio_init_mbox_res(res, mbox, mbox); | |
242 | ||
243 | /* Make sure this mailbox isn't in use */ | |
244 | if ((rc = | |
245 | request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], | |
246 | res)) < 0) { | |
247 | kfree(res); | |
248 | goto out; | |
249 | } | |
250 | ||
251 | mport->inb_msg[mbox].res = res; | |
252 | ||
253 | /* Hook the inbound message callback */ | |
254 | mport->inb_msg[mbox].mcback = minb; | |
255 | ||
f8f06269 | 256 | rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
257 | } else |
258 | rc = -ENOMEM; | |
259 | ||
260 | out: | |
261 | return rc; | |
262 | } | |
263 | ||
264 | /** | |
265 | * rio_release_inb_mbox - release inbound mailbox message service | |
266 | * @mport: RIO master port from which to release the mailbox resource | |
267 | * @mbox: Mailbox number to release | |
268 | * | |
269 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
270 | * if the request has been satisfied. | |
271 | */ | |
272 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) | |
273 | { | |
f8f06269 AB |
274 | if (mport->ops->close_inb_mbox) { |
275 | mport->ops->close_inb_mbox(mport, mbox); | |
394b701c | 276 | |
f8f06269 AB |
277 | /* Release the mailbox resource */ |
278 | return release_resource(mport->inb_msg[mbox].res); | |
279 | } else | |
280 | return -ENOSYS; | |
394b701c MP |
281 | } |
282 | ||
283 | /** | |
284 | * rio_request_outb_mbox - request outbound mailbox service | |
285 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 286 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
287 | * @mbox: Mailbox number to claim |
288 | * @entries: Number of entries in outbound mailbox queue | |
289 | * @moutb: Callback to execute when outbound message is sent | |
290 | * | |
291 | * Requests ownership of an outbound mailbox resource and binds | |
292 | * a callback function to the resource. Returns 0 on success. | |
293 | */ | |
294 | int rio_request_outb_mbox(struct rio_mport *mport, | |
6978bbc0 | 295 | void *dev_id, |
394b701c MP |
296 | int mbox, |
297 | int entries, | |
6978bbc0 | 298 | void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) |
394b701c | 299 | { |
f8f06269 AB |
300 | int rc = -ENOSYS; |
301 | struct resource *res; | |
394b701c | 302 | |
f8f06269 AB |
303 | if (mport->ops->open_outb_mbox == NULL) |
304 | goto out; | |
305 | ||
9a975bee | 306 | res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
394b701c MP |
307 | |
308 | if (res) { | |
309 | rio_init_mbox_res(res, mbox, mbox); | |
310 | ||
311 | /* Make sure this outbound mailbox isn't in use */ | |
312 | if ((rc = | |
313 | request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], | |
314 | res)) < 0) { | |
315 | kfree(res); | |
316 | goto out; | |
317 | } | |
318 | ||
319 | mport->outb_msg[mbox].res = res; | |
320 | ||
321 | /* Hook the inbound message callback */ | |
322 | mport->outb_msg[mbox].mcback = moutb; | |
323 | ||
f8f06269 | 324 | rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries); |
394b701c MP |
325 | } else |
326 | rc = -ENOMEM; | |
327 | ||
328 | out: | |
329 | return rc; | |
330 | } | |
331 | ||
332 | /** | |
333 | * rio_release_outb_mbox - release outbound mailbox message service | |
334 | * @mport: RIO master port from which to release the mailbox resource | |
335 | * @mbox: Mailbox number to release | |
336 | * | |
337 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
338 | * if the request has been satisfied. | |
339 | */ | |
340 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) | |
341 | { | |
f8f06269 AB |
342 | if (mport->ops->close_outb_mbox) { |
343 | mport->ops->close_outb_mbox(mport, mbox); | |
394b701c | 344 | |
f8f06269 AB |
345 | /* Release the mailbox resource */ |
346 | return release_resource(mport->outb_msg[mbox].res); | |
347 | } else | |
348 | return -ENOSYS; | |
394b701c MP |
349 | } |
350 | ||
351 | /** | |
352 | * rio_setup_inb_dbell - bind inbound doorbell callback | |
353 | * @mport: RIO master port to bind the doorbell callback | |
6978bbc0 | 354 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
355 | * @res: Doorbell message resource |
356 | * @dinb: Callback to execute when doorbell is received | |
357 | * | |
358 | * Adds a doorbell resource/callback pair into a port's | |
359 | * doorbell event list. Returns 0 if the request has been | |
360 | * satisfied. | |
361 | */ | |
362 | static int | |
6978bbc0 MP |
363 | rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
364 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, | |
394b701c MP |
365 | u16 info)) |
366 | { | |
367 | int rc = 0; | |
368 | struct rio_dbell *dbell; | |
369 | ||
370 | if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { | |
371 | rc = -ENOMEM; | |
372 | goto out; | |
373 | } | |
374 | ||
375 | dbell->res = res; | |
376 | dbell->dinb = dinb; | |
6978bbc0 | 377 | dbell->dev_id = dev_id; |
394b701c | 378 | |
a7b4c636 | 379 | mutex_lock(&mport->lock); |
394b701c | 380 | list_add_tail(&dbell->node, &mport->dbells); |
a7b4c636 | 381 | mutex_unlock(&mport->lock); |
394b701c MP |
382 | |
383 | out: | |
384 | return rc; | |
385 | } | |
386 | ||
387 | /** | |
388 | * rio_request_inb_dbell - request inbound doorbell message service | |
389 | * @mport: RIO master port from which to allocate the doorbell resource | |
6978bbc0 | 390 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
391 | * @start: Doorbell info range start |
392 | * @end: Doorbell info range end | |
393 | * @dinb: Callback to execute when doorbell is received | |
394 | * | |
395 | * Requests ownership of an inbound doorbell resource and binds | |
396 | * a callback function to the resource. Returns 0 if the request | |
397 | * has been satisfied. | |
398 | */ | |
399 | int rio_request_inb_dbell(struct rio_mport *mport, | |
6978bbc0 | 400 | void *dev_id, |
394b701c MP |
401 | u16 start, |
402 | u16 end, | |
6978bbc0 | 403 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
394b701c MP |
404 | u16 dst, u16 info)) |
405 | { | |
406 | int rc = 0; | |
407 | ||
9a975bee | 408 | struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
394b701c MP |
409 | |
410 | if (res) { | |
411 | rio_init_dbell_res(res, start, end); | |
412 | ||
413 | /* Make sure these doorbells aren't in use */ | |
414 | if ((rc = | |
415 | request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], | |
416 | res)) < 0) { | |
417 | kfree(res); | |
418 | goto out; | |
419 | } | |
420 | ||
421 | /* Hook the doorbell callback */ | |
6978bbc0 | 422 | rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
394b701c MP |
423 | } else |
424 | rc = -ENOMEM; | |
425 | ||
426 | out: | |
427 | return rc; | |
428 | } | |
429 | ||
430 | /** | |
431 | * rio_release_inb_dbell - release inbound doorbell message service | |
432 | * @mport: RIO master port from which to release the doorbell resource | |
433 | * @start: Doorbell info range start | |
434 | * @end: Doorbell info range end | |
435 | * | |
436 | * Releases ownership of an inbound doorbell resource and removes | |
437 | * callback from the doorbell event list. Returns 0 if the request | |
438 | * has been satisfied. | |
439 | */ | |
440 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) | |
441 | { | |
442 | int rc = 0, found = 0; | |
443 | struct rio_dbell *dbell; | |
444 | ||
a7b4c636 | 445 | mutex_lock(&mport->lock); |
394b701c MP |
446 | list_for_each_entry(dbell, &mport->dbells, node) { |
447 | if ((dbell->res->start == start) && (dbell->res->end == end)) { | |
a7b4c636 | 448 | list_del(&dbell->node); |
394b701c MP |
449 | found = 1; |
450 | break; | |
451 | } | |
452 | } | |
a7b4c636 | 453 | mutex_unlock(&mport->lock); |
394b701c MP |
454 | |
455 | /* If we can't find an exact match, fail */ | |
456 | if (!found) { | |
457 | rc = -EINVAL; | |
458 | goto out; | |
459 | } | |
460 | ||
394b701c MP |
461 | /* Release the doorbell resource */ |
462 | rc = release_resource(dbell->res); | |
463 | ||
464 | /* Free the doorbell event */ | |
465 | kfree(dbell); | |
466 | ||
467 | out: | |
468 | return rc; | |
469 | } | |
470 | ||
471 | /** | |
472 | * rio_request_outb_dbell - request outbound doorbell message range | |
473 | * @rdev: RIO device from which to allocate the doorbell resource | |
474 | * @start: Doorbell message range start | |
475 | * @end: Doorbell message range end | |
476 | * | |
477 | * Requests ownership of a doorbell message range. Returns a resource | |
478 | * if the request has been satisfied or %NULL on failure. | |
479 | */ | |
480 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, | |
481 | u16 end) | |
482 | { | |
9a975bee | 483 | struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
394b701c MP |
484 | |
485 | if (res) { | |
486 | rio_init_dbell_res(res, start, end); | |
487 | ||
488 | /* Make sure these doorbells aren't in use */ | |
489 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) | |
490 | < 0) { | |
491 | kfree(res); | |
492 | res = NULL; | |
493 | } | |
494 | } | |
495 | ||
496 | return res; | |
497 | } | |
498 | ||
499 | /** | |
500 | * rio_release_outb_dbell - release outbound doorbell message range | |
501 | * @rdev: RIO device from which to release the doorbell resource | |
502 | * @res: Doorbell resource to be freed | |
503 | * | |
504 | * Releases ownership of a doorbell message range. Returns 0 if the | |
505 | * request has been satisfied. | |
506 | */ | |
507 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) | |
508 | { | |
509 | int rc = release_resource(res); | |
510 | ||
511 | kfree(res); | |
512 | ||
513 | return rc; | |
514 | } | |
515 | ||
e5cabeb3 AB |
516 | /** |
517 | * rio_request_inb_pwrite - request inbound port-write message service | |
97ef6f74 | 518 | * @rdev: RIO device to which register inbound port-write callback routine |
e5cabeb3 AB |
519 | * @pwcback: Callback routine to execute when port-write is received |
520 | * | |
521 | * Binds a port-write callback function to the RapidIO device. | |
522 | * Returns 0 if the request has been satisfied. | |
523 | */ | |
524 | int rio_request_inb_pwrite(struct rio_dev *rdev, | |
525 | int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) | |
526 | { | |
527 | int rc = 0; | |
528 | ||
529 | spin_lock(&rio_global_list_lock); | |
530 | if (rdev->pwcback != NULL) | |
531 | rc = -ENOMEM; | |
532 | else | |
533 | rdev->pwcback = pwcback; | |
534 | ||
535 | spin_unlock(&rio_global_list_lock); | |
536 | return rc; | |
537 | } | |
538 | EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); | |
539 | ||
540 | /** | |
541 | * rio_release_inb_pwrite - release inbound port-write message service | |
542 | * @rdev: RIO device which registered for inbound port-write callback | |
543 | * | |
544 | * Removes callback from the rio_dev structure. Returns 0 if the request | |
545 | * has been satisfied. | |
546 | */ | |
547 | int rio_release_inb_pwrite(struct rio_dev *rdev) | |
548 | { | |
549 | int rc = -ENOMEM; | |
550 | ||
551 | spin_lock(&rio_global_list_lock); | |
552 | if (rdev->pwcback) { | |
553 | rdev->pwcback = NULL; | |
554 | rc = 0; | |
555 | } | |
556 | ||
557 | spin_unlock(&rio_global_list_lock); | |
558 | return rc; | |
559 | } | |
560 | EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); | |
561 | ||
da1589f0 AB |
562 | /** |
563 | * rio_map_inb_region -- Map inbound memory region. | |
564 | * @mport: Master port. | |
2ca3cb50 | 565 | * @local: physical address of memory region to be mapped |
da1589f0 AB |
566 | * @rbase: RIO base address assigned to this window |
567 | * @size: Size of the memory region | |
568 | * @rflags: Flags for mapping. | |
569 | * | |
570 | * Return: 0 -- Success. | |
571 | * | |
572 | * This function will create the mapping from RIO space to local memory. | |
573 | */ | |
574 | int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local, | |
575 | u64 rbase, u32 size, u32 rflags) | |
576 | { | |
577 | int rc = 0; | |
578 | unsigned long flags; | |
579 | ||
580 | if (!mport->ops->map_inb) | |
581 | return -1; | |
582 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
583 | rc = mport->ops->map_inb(mport, local, rbase, size, rflags); | |
584 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
585 | return rc; | |
586 | } | |
587 | EXPORT_SYMBOL_GPL(rio_map_inb_region); | |
588 | ||
589 | /** | |
590 | * rio_unmap_inb_region -- Unmap the inbound memory region | |
591 | * @mport: Master port | |
592 | * @lstart: physical address of memory region to be unmapped | |
593 | */ | |
594 | void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart) | |
595 | { | |
596 | unsigned long flags; | |
597 | if (!mport->ops->unmap_inb) | |
598 | return; | |
599 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
600 | mport->ops->unmap_inb(mport, lstart); | |
601 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
602 | } | |
603 | EXPORT_SYMBOL_GPL(rio_unmap_inb_region); | |
604 | ||
e5cabeb3 AB |
605 | /** |
606 | * rio_mport_get_physefb - Helper function that returns register offset | |
607 | * for Physical Layer Extended Features Block. | |
97ef6f74 RD |
608 | * @port: Master port to issue transaction |
609 | * @local: Indicate a local master port or remote device access | |
610 | * @destid: Destination ID of the device | |
611 | * @hopcount: Number of switch hops to the device | |
e5cabeb3 AB |
612 | */ |
613 | u32 | |
614 | rio_mport_get_physefb(struct rio_mport *port, int local, | |
615 | u16 destid, u8 hopcount) | |
616 | { | |
617 | u32 ext_ftr_ptr; | |
618 | u32 ftr_header; | |
619 | ||
620 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); | |
621 | ||
622 | while (ext_ftr_ptr) { | |
623 | if (local) | |
624 | rio_local_read_config_32(port, ext_ftr_ptr, | |
625 | &ftr_header); | |
626 | else | |
627 | rio_mport_read_config_32(port, destid, hopcount, | |
628 | ext_ftr_ptr, &ftr_header); | |
629 | ||
630 | ftr_header = RIO_GET_BLOCK_ID(ftr_header); | |
631 | switch (ftr_header) { | |
632 | ||
633 | case RIO_EFB_SER_EP_ID_V13P: | |
634 | case RIO_EFB_SER_EP_REC_ID_V13P: | |
635 | case RIO_EFB_SER_EP_FREE_ID_V13P: | |
636 | case RIO_EFB_SER_EP_ID: | |
637 | case RIO_EFB_SER_EP_REC_ID: | |
638 | case RIO_EFB_SER_EP_FREE_ID: | |
639 | case RIO_EFB_SER_EP_FREC_ID: | |
640 | ||
641 | return ext_ftr_ptr; | |
642 | ||
643 | default: | |
644 | break; | |
645 | } | |
646 | ||
647 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, | |
648 | hopcount, ext_ftr_ptr); | |
649 | } | |
650 | ||
651 | return ext_ftr_ptr; | |
652 | } | |
a11650e1 | 653 | EXPORT_SYMBOL_GPL(rio_mport_get_physefb); |
e5cabeb3 AB |
654 | |
655 | /** | |
656 | * rio_get_comptag - Begin or continue searching for a RIO device by component tag | |
97ef6f74 | 657 | * @comp_tag: RIO component tag to match |
e5cabeb3 AB |
658 | * @from: Previous RIO device found in search, or %NULL for new search |
659 | * | |
660 | * Iterates through the list of known RIO devices. If a RIO device is | |
661 | * found with a matching @comp_tag, a pointer to its device | |
662 | * structure is returned. Otherwise, %NULL is returned. A new search | |
663 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
664 | * @from is not %NULL, searches continue from next device on the global | |
665 | * list. | |
666 | */ | |
af84ca38 | 667 | struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) |
e5cabeb3 AB |
668 | { |
669 | struct list_head *n; | |
670 | struct rio_dev *rdev; | |
671 | ||
e5cabeb3 AB |
672 | spin_lock(&rio_global_list_lock); |
673 | n = from ? from->global_list.next : rio_devices.next; | |
674 | ||
675 | while (n && (n != &rio_devices)) { | |
676 | rdev = rio_dev_g(n); | |
677 | if (rdev->comp_tag == comp_tag) | |
678 | goto exit; | |
679 | n = n->next; | |
680 | } | |
681 | rdev = NULL; | |
682 | exit: | |
683 | spin_unlock(&rio_global_list_lock); | |
684 | return rdev; | |
685 | } | |
a11650e1 | 686 | EXPORT_SYMBOL_GPL(rio_get_comptag); |
e5cabeb3 AB |
687 | |
688 | /** | |
689 | * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. | |
690 | * @rdev: Pointer to RIO device control structure | |
691 | * @pnum: Switch port number to set LOCKOUT bit | |
692 | * @lock: Operation : set (=1) or clear (=0) | |
693 | */ | |
694 | int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) | |
695 | { | |
e5cabeb3 AB |
696 | u32 regval; |
697 | ||
a93192a5 | 698 | rio_read_config_32(rdev, |
e5cabeb3 AB |
699 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
700 | ®val); | |
701 | if (lock) | |
702 | regval |= RIO_PORT_N_CTL_LOCKOUT; | |
703 | else | |
704 | regval &= ~RIO_PORT_N_CTL_LOCKOUT; | |
705 | ||
a93192a5 | 706 | rio_write_config_32(rdev, |
e5cabeb3 AB |
707 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
708 | regval); | |
709 | return 0; | |
710 | } | |
a11650e1 AB |
711 | EXPORT_SYMBOL_GPL(rio_set_port_lockout); |
712 | ||
a11650e1 AB |
713 | /** |
714 | * rio_enable_rx_tx_port - enable input receiver and output transmitter of | |
715 | * given port | |
716 | * @port: Master port associated with the RIO network | |
717 | * @local: local=1 select local port otherwise a far device is reached | |
718 | * @destid: Destination ID of the device to check host bit | |
719 | * @hopcount: Number of hops to reach the target | |
720 | * @port_num: Port (-number on switch) to enable on a far end device | |
721 | * | |
722 | * Returns 0 or 1 from on General Control Command and Status Register | |
723 | * (EXT_PTR+0x3C) | |
724 | */ | |
725 | int rio_enable_rx_tx_port(struct rio_mport *port, | |
726 | int local, u16 destid, | |
727 | u8 hopcount, u8 port_num) | |
728 | { | |
729 | #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS | |
730 | u32 regval; | |
731 | u32 ext_ftr_ptr; | |
732 | ||
733 | /* | |
734 | * enable rx input tx output port | |
735 | */ | |
736 | pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " | |
737 | "%d, port_num = %d)\n", local, destid, hopcount, port_num); | |
738 | ||
739 | ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); | |
740 | ||
741 | if (local) { | |
742 | rio_local_read_config_32(port, ext_ftr_ptr + | |
743 | RIO_PORT_N_CTL_CSR(0), | |
744 | ®val); | |
745 | } else { | |
746 | if (rio_mport_read_config_32(port, destid, hopcount, | |
747 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) | |
748 | return -EIO; | |
749 | } | |
750 | ||
751 | if (regval & RIO_PORT_N_CTL_P_TYP_SER) { | |
752 | /* serial */ | |
753 | regval = regval | RIO_PORT_N_CTL_EN_RX_SER | |
754 | | RIO_PORT_N_CTL_EN_TX_SER; | |
755 | } else { | |
756 | /* parallel */ | |
757 | regval = regval | RIO_PORT_N_CTL_EN_RX_PAR | |
758 | | RIO_PORT_N_CTL_EN_TX_PAR; | |
759 | } | |
760 | ||
761 | if (local) { | |
762 | rio_local_write_config_32(port, ext_ftr_ptr + | |
763 | RIO_PORT_N_CTL_CSR(0), regval); | |
764 | } else { | |
765 | if (rio_mport_write_config_32(port, destid, hopcount, | |
766 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) | |
767 | return -EIO; | |
768 | } | |
769 | #endif | |
770 | return 0; | |
771 | } | |
772 | EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port); | |
773 | ||
e5cabeb3 | 774 | |
6429cd49 AB |
775 | /** |
776 | * rio_chk_dev_route - Validate route to the specified device. | |
777 | * @rdev: RIO device failed to respond | |
778 | * @nrdev: Last active device on the route to rdev | |
779 | * @npnum: nrdev's port number on the route to rdev | |
780 | * | |
781 | * Follows a route to the specified RIO device to determine the last available | |
782 | * device (and corresponding RIO port) on the route. | |
783 | */ | |
784 | static int | |
785 | rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) | |
786 | { | |
787 | u32 result; | |
a93192a5 | 788 | int p_port, rc = -EIO; |
6429cd49 AB |
789 | struct rio_dev *prev = NULL; |
790 | ||
791 | /* Find switch with failed RIO link */ | |
792 | while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { | |
793 | if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { | |
794 | prev = rdev->prev; | |
795 | break; | |
796 | } | |
797 | rdev = rdev->prev; | |
798 | } | |
799 | ||
800 | if (prev == NULL) | |
801 | goto err_out; | |
802 | ||
a93192a5 | 803 | p_port = prev->rswitch->route_table[rdev->destid]; |
6429cd49 | 804 | |
af84ca38 | 805 | if (p_port != RIO_INVALID_ROUTE) { |
6429cd49 AB |
806 | pr_debug("RIO: link failed on [%s]-P%d\n", |
807 | rio_name(prev), p_port); | |
808 | *nrdev = prev; | |
809 | *npnum = p_port; | |
810 | rc = 0; | |
811 | } else | |
af84ca38 | 812 | pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); |
6429cd49 AB |
813 | err_out: |
814 | return rc; | |
815 | } | |
816 | ||
817 | /** | |
818 | * rio_mport_chk_dev_access - Validate access to the specified device. | |
819 | * @mport: Master port to send transactions | |
820 | * @destid: Device destination ID in network | |
821 | * @hopcount: Number of hops into the network | |
822 | */ | |
e274e0ed | 823 | int |
6429cd49 AB |
824 | rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) |
825 | { | |
826 | int i = 0; | |
827 | u32 tmp; | |
828 | ||
829 | while (rio_mport_read_config_32(mport, destid, hopcount, | |
830 | RIO_DEV_ID_CAR, &tmp)) { | |
831 | i++; | |
832 | if (i == RIO_MAX_CHK_RETRY) | |
833 | return -EIO; | |
834 | mdelay(1); | |
835 | } | |
836 | ||
837 | return 0; | |
838 | } | |
a11650e1 | 839 | EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access); |
6429cd49 AB |
840 | |
841 | /** | |
842 | * rio_chk_dev_access - Validate access to the specified device. | |
843 | * @rdev: Pointer to RIO device control structure | |
844 | */ | |
845 | static int rio_chk_dev_access(struct rio_dev *rdev) | |
846 | { | |
a93192a5 AB |
847 | return rio_mport_chk_dev_access(rdev->net->hport, |
848 | rdev->destid, rdev->hopcount); | |
6429cd49 AB |
849 | } |
850 | ||
dd5648c9 AB |
851 | /** |
852 | * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and | |
853 | * returns link-response (if requested). | |
854 | * @rdev: RIO devive to issue Input-status command | |
855 | * @pnum: Device port number to issue the command | |
856 | * @lnkresp: Response from a link partner | |
857 | */ | |
858 | static int | |
859 | rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) | |
860 | { | |
dd5648c9 AB |
861 | u32 regval; |
862 | int checkcount; | |
863 | ||
864 | if (lnkresp) { | |
865 | /* Read from link maintenance response register | |
866 | * to clear valid bit */ | |
a93192a5 | 867 | rio_read_config_32(rdev, |
dd5648c9 AB |
868 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
869 | ®val); | |
870 | udelay(50); | |
871 | } | |
872 | ||
873 | /* Issue Input-status command */ | |
a93192a5 | 874 | rio_write_config_32(rdev, |
dd5648c9 AB |
875 | rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), |
876 | RIO_MNT_REQ_CMD_IS); | |
877 | ||
878 | /* Exit if the response is not expected */ | |
879 | if (lnkresp == NULL) | |
880 | return 0; | |
881 | ||
882 | checkcount = 3; | |
883 | while (checkcount--) { | |
884 | udelay(50); | |
a93192a5 | 885 | rio_read_config_32(rdev, |
dd5648c9 AB |
886 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
887 | ®val); | |
888 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) { | |
889 | *lnkresp = regval; | |
890 | return 0; | |
891 | } | |
892 | } | |
893 | ||
894 | return -EIO; | |
895 | } | |
896 | ||
897 | /** | |
898 | * rio_clr_err_stopped - Clears port Error-stopped states. | |
899 | * @rdev: Pointer to RIO device control structure | |
900 | * @pnum: Switch port number to clear errors | |
901 | * @err_status: port error status (if 0 reads register from device) | |
902 | */ | |
903 | static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) | |
904 | { | |
dd5648c9 AB |
905 | struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; |
906 | u32 regval; | |
907 | u32 far_ackid, far_linkstat, near_ackid; | |
908 | ||
909 | if (err_status == 0) | |
a93192a5 | 910 | rio_read_config_32(rdev, |
dd5648c9 AB |
911 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
912 | &err_status); | |
913 | ||
914 | if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { | |
915 | pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); | |
916 | /* | |
917 | * Send a Link-Request/Input-Status control symbol | |
918 | */ | |
919 | if (rio_get_input_status(rdev, pnum, ®val)) { | |
920 | pr_debug("RIO_EM: Input-status response timeout\n"); | |
921 | goto rd_err; | |
922 | } | |
923 | ||
924 | pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", | |
925 | pnum, regval); | |
926 | far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; | |
927 | far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; | |
a93192a5 | 928 | rio_read_config_32(rdev, |
dd5648c9 AB |
929 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), |
930 | ®val); | |
931 | pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); | |
932 | near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; | |
933 | pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ | |
934 | " near_ackID=0x%02x\n", | |
935 | pnum, far_ackid, far_linkstat, near_ackid); | |
936 | ||
937 | /* | |
938 | * If required, synchronize ackIDs of near and | |
939 | * far sides. | |
940 | */ | |
941 | if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || | |
942 | (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { | |
943 | /* Align near outstanding/outbound ackIDs with | |
944 | * far inbound. | |
945 | */ | |
a93192a5 AB |
946 | rio_write_config_32(rdev, |
947 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), | |
dd5648c9 AB |
948 | (near_ackid << 24) | |
949 | (far_ackid << 8) | far_ackid); | |
950 | /* Align far outstanding/outbound ackIDs with | |
951 | * near inbound. | |
952 | */ | |
953 | far_ackid++; | |
954 | if (nextdev) | |
955 | rio_write_config_32(nextdev, | |
956 | nextdev->phys_efptr + | |
957 | RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), | |
958 | (far_ackid << 24) | | |
959 | (near_ackid << 8) | near_ackid); | |
960 | else | |
961 | pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); | |
962 | } | |
963 | rd_err: | |
a93192a5 | 964 | rio_read_config_32(rdev, |
dd5648c9 AB |
965 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
966 | &err_status); | |
967 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
968 | } | |
969 | ||
970 | if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { | |
971 | pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); | |
972 | rio_get_input_status(nextdev, | |
973 | RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); | |
974 | udelay(50); | |
975 | ||
a93192a5 | 976 | rio_read_config_32(rdev, |
dd5648c9 AB |
977 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
978 | &err_status); | |
979 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
980 | } | |
981 | ||
982 | return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
983 | RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0; | |
984 | } | |
985 | ||
e5cabeb3 AB |
986 | /** |
987 | * rio_inb_pwrite_handler - process inbound port-write message | |
988 | * @pw_msg: pointer to inbound port-write message | |
989 | * | |
990 | * Processes an inbound port-write message. Returns 0 if the request | |
991 | * has been satisfied. | |
992 | */ | |
993 | int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg) | |
994 | { | |
995 | struct rio_dev *rdev; | |
dd5648c9 | 996 | u32 err_status, em_perrdet, em_ltlerrdet; |
e5cabeb3 AB |
997 | int rc, portnum; |
998 | ||
e6536927 | 999 | rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL); |
e5cabeb3 | 1000 | if (rdev == NULL) { |
6429cd49 AB |
1001 | /* Device removed or enumeration error */ |
1002 | pr_debug("RIO: %s No matching device for CTag 0x%08x\n", | |
e5cabeb3 AB |
1003 | __func__, pw_msg->em.comptag); |
1004 | return -EIO; | |
1005 | } | |
1006 | ||
1007 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); | |
1008 | ||
1009 | #ifdef DEBUG_PW | |
1010 | { | |
1011 | u32 i; | |
1012 | for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32);) { | |
dd5648c9 | 1013 | pr_debug("0x%02x: %08x %08x %08x %08x\n", |
e5cabeb3 AB |
1014 | i*4, pw_msg->raw[i], pw_msg->raw[i + 1], |
1015 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); | |
1016 | i += 4; | |
1017 | } | |
e5cabeb3 AB |
1018 | } |
1019 | #endif | |
1020 | ||
1021 | /* Call an external service function (if such is registered | |
1022 | * for this device). This may be the service for endpoints that send | |
1023 | * device-specific port-write messages. End-point messages expected | |
1024 | * to be handled completely by EP specific device driver. | |
1025 | * For switches rc==0 signals that no standard processing required. | |
1026 | */ | |
1027 | if (rdev->pwcback != NULL) { | |
1028 | rc = rdev->pwcback(rdev, pw_msg, 0); | |
1029 | if (rc == 0) | |
1030 | return 0; | |
1031 | } | |
1032 | ||
6429cd49 AB |
1033 | portnum = pw_msg->em.is_port & 0xFF; |
1034 | ||
1035 | /* Check if device and route to it are functional: | |
1036 | * Sometimes devices may send PW message(s) just before being | |
1037 | * powered down (or link being lost). | |
1038 | */ | |
1039 | if (rio_chk_dev_access(rdev)) { | |
1040 | pr_debug("RIO: device access failed - get link partner\n"); | |
1041 | /* Scan route to the device and identify failed link. | |
1042 | * This will replace device and port reported in PW message. | |
1043 | * PW message should not be used after this point. | |
1044 | */ | |
1045 | if (rio_chk_dev_route(rdev, &rdev, &portnum)) { | |
1046 | pr_err("RIO: Route trace for %s failed\n", | |
1047 | rio_name(rdev)); | |
1048 | return -EIO; | |
1049 | } | |
1050 | pw_msg = NULL; | |
1051 | } | |
1052 | ||
e5cabeb3 AB |
1053 | /* For End-point devices processing stops here */ |
1054 | if (!(rdev->pef & RIO_PEF_SWITCH)) | |
1055 | return 0; | |
1056 | ||
1057 | if (rdev->phys_efptr == 0) { | |
1058 | pr_err("RIO_PW: Bad switch initialization for %s\n", | |
1059 | rio_name(rdev)); | |
1060 | return 0; | |
1061 | } | |
1062 | ||
e5cabeb3 AB |
1063 | /* |
1064 | * Process the port-write notification from switch | |
1065 | */ | |
2ec3ba69 AB |
1066 | if (rdev->rswitch->ops && rdev->rswitch->ops->em_handle) |
1067 | rdev->rswitch->ops->em_handle(rdev, portnum); | |
e5cabeb3 | 1068 | |
a93192a5 | 1069 | rio_read_config_32(rdev, |
e5cabeb3 AB |
1070 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
1071 | &err_status); | |
1072 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); | |
1073 | ||
dd5648c9 | 1074 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { |
e5cabeb3 | 1075 | |
dd5648c9 AB |
1076 | if (!(rdev->rswitch->port_ok & (1 << portnum))) { |
1077 | rdev->rswitch->port_ok |= (1 << portnum); | |
1078 | rio_set_port_lockout(rdev, portnum, 0); | |
1079 | /* Schedule Insertion Service */ | |
1080 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", | |
1081 | rio_name(rdev), portnum); | |
1082 | } | |
e5cabeb3 | 1083 | |
dd5648c9 AB |
1084 | /* Clear error-stopped states (if reported). |
1085 | * Depending on the link partner state, two attempts | |
1086 | * may be needed for successful recovery. | |
1087 | */ | |
1088 | if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
1089 | RIO_PORT_N_ERR_STS_PW_INP_ES)) { | |
1090 | if (rio_clr_err_stopped(rdev, portnum, err_status)) | |
1091 | rio_clr_err_stopped(rdev, portnum, 0); | |
1092 | } | |
1093 | } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ | |
e5cabeb3 | 1094 | |
dd5648c9 | 1095 | if (rdev->rswitch->port_ok & (1 << portnum)) { |
e5cabeb3 AB |
1096 | rdev->rswitch->port_ok &= ~(1 << portnum); |
1097 | rio_set_port_lockout(rdev, portnum, 1); | |
1098 | ||
a93192a5 | 1099 | rio_write_config_32(rdev, |
e5cabeb3 AB |
1100 | rdev->phys_efptr + |
1101 | RIO_PORT_N_ACK_STS_CSR(portnum), | |
1102 | RIO_PORT_N_ACK_CLEAR); | |
1103 | ||
1104 | /* Schedule Extraction Service */ | |
1105 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", | |
1106 | rio_name(rdev), portnum); | |
1107 | } | |
dd5648c9 | 1108 | } |
e5cabeb3 | 1109 | |
a93192a5 | 1110 | rio_read_config_32(rdev, |
dd5648c9 AB |
1111 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); |
1112 | if (em_perrdet) { | |
1113 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", | |
1114 | portnum, em_perrdet); | |
1115 | /* Clear EM Port N Error Detect CSR */ | |
a93192a5 | 1116 | rio_write_config_32(rdev, |
dd5648c9 AB |
1117 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); |
1118 | } | |
1119 | ||
a93192a5 | 1120 | rio_read_config_32(rdev, |
dd5648c9 AB |
1121 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); |
1122 | if (em_ltlerrdet) { | |
1123 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", | |
1124 | em_ltlerrdet); | |
1125 | /* Clear EM L/T Layer Error Detect CSR */ | |
a93192a5 | 1126 | rio_write_config_32(rdev, |
dd5648c9 | 1127 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); |
e5cabeb3 AB |
1128 | } |
1129 | ||
388c45cc | 1130 | /* Clear remaining error bits and Port-Write Pending bit */ |
a93192a5 | 1131 | rio_write_config_32(rdev, |
dd5648c9 | 1132 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
388c45cc | 1133 | err_status); |
e5cabeb3 AB |
1134 | |
1135 | return 0; | |
1136 | } | |
1137 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); | |
1138 | ||
1139 | /** | |
1140 | * rio_mport_get_efb - get pointer to next extended features block | |
1141 | * @port: Master port to issue transaction | |
1142 | * @local: Indicate a local master port or remote device access | |
1143 | * @destid: Destination ID of the device | |
1144 | * @hopcount: Number of switch hops to the device | |
1145 | * @from: Offset of current Extended Feature block header (if 0 starts | |
1146 | * from ExtFeaturePtr) | |
1147 | */ | |
1148 | u32 | |
1149 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, | |
1150 | u8 hopcount, u32 from) | |
1151 | { | |
1152 | u32 reg_val; | |
1153 | ||
1154 | if (from == 0) { | |
1155 | if (local) | |
1156 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, | |
1157 | ®_val); | |
1158 | else | |
1159 | rio_mport_read_config_32(port, destid, hopcount, | |
1160 | RIO_ASM_INFO_CAR, ®_val); | |
1161 | return reg_val & RIO_EXT_FTR_PTR_MASK; | |
1162 | } else { | |
1163 | if (local) | |
1164 | rio_local_read_config_32(port, from, ®_val); | |
1165 | else | |
1166 | rio_mport_read_config_32(port, destid, hopcount, | |
1167 | from, ®_val); | |
1168 | return RIO_GET_BLOCK_ID(reg_val); | |
1169 | } | |
1170 | } | |
a11650e1 | 1171 | EXPORT_SYMBOL_GPL(rio_mport_get_efb); |
e5cabeb3 | 1172 | |
394b701c MP |
1173 | /** |
1174 | * rio_mport_get_feature - query for devices' extended features | |
1175 | * @port: Master port to issue transaction | |
1176 | * @local: Indicate a local master port or remote device access | |
1177 | * @destid: Destination ID of the device | |
1178 | * @hopcount: Number of switch hops to the device | |
1179 | * @ftr: Extended feature code | |
1180 | * | |
1181 | * Tell if a device supports a given RapidIO capability. | |
1182 | * Returns the offset of the requested extended feature | |
1183 | * block within the device's RIO configuration space or | |
1184 | * 0 in case the device does not support it. Possible | |
1185 | * values for @ftr: | |
1186 | * | |
1187 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices | |
1188 | * | |
1189 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices | |
1190 | * | |
1191 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices | |
1192 | * | |
1193 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices | |
1194 | * | |
1195 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices | |
1196 | * | |
1197 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices | |
1198 | */ | |
1199 | u32 | |
1200 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, | |
1201 | u8 hopcount, int ftr) | |
1202 | { | |
1203 | u32 asm_info, ext_ftr_ptr, ftr_header; | |
1204 | ||
1205 | if (local) | |
1206 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); | |
1207 | else | |
1208 | rio_mport_read_config_32(port, destid, hopcount, | |
1209 | RIO_ASM_INFO_CAR, &asm_info); | |
1210 | ||
1211 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; | |
1212 | ||
1213 | while (ext_ftr_ptr) { | |
1214 | if (local) | |
1215 | rio_local_read_config_32(port, ext_ftr_ptr, | |
1216 | &ftr_header); | |
1217 | else | |
1218 | rio_mport_read_config_32(port, destid, hopcount, | |
1219 | ext_ftr_ptr, &ftr_header); | |
1220 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) | |
1221 | return ext_ftr_ptr; | |
1222 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) | |
1223 | break; | |
1224 | } | |
1225 | ||
1226 | return 0; | |
1227 | } | |
a11650e1 | 1228 | EXPORT_SYMBOL_GPL(rio_mport_get_feature); |
394b701c MP |
1229 | |
1230 | /** | |
1231 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did | |
1232 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1233 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1234 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids | |
1235 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids | |
1236 | * @from: Previous RIO device found in search, or %NULL for new search | |
1237 | * | |
1238 | * Iterates through the list of known RIO devices. If a RIO device is | |
1239 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference | |
1240 | * count to the device is incrememted and a pointer to its device | |
1241 | * structure is returned. Otherwise, %NULL is returned. A new search | |
1242 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
1243 | * @from is not %NULL, searches continue from next device on the global | |
1244 | * list. The reference count for @from is always decremented if it is | |
1245 | * not %NULL. | |
1246 | */ | |
1247 | struct rio_dev *rio_get_asm(u16 vid, u16 did, | |
1248 | u16 asm_vid, u16 asm_did, struct rio_dev *from) | |
1249 | { | |
1250 | struct list_head *n; | |
1251 | struct rio_dev *rdev; | |
1252 | ||
1253 | WARN_ON(in_interrupt()); | |
1254 | spin_lock(&rio_global_list_lock); | |
1255 | n = from ? from->global_list.next : rio_devices.next; | |
1256 | ||
1257 | while (n && (n != &rio_devices)) { | |
1258 | rdev = rio_dev_g(n); | |
1259 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && | |
1260 | (did == RIO_ANY_ID || rdev->did == did) && | |
1261 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && | |
1262 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) | |
1263 | goto exit; | |
1264 | n = n->next; | |
1265 | } | |
1266 | rdev = NULL; | |
1267 | exit: | |
1268 | rio_dev_put(from); | |
1269 | rdev = rio_dev_get(rdev); | |
1270 | spin_unlock(&rio_global_list_lock); | |
1271 | return rdev; | |
1272 | } | |
1273 | ||
1274 | /** | |
1275 | * rio_get_device - Begin or continue searching for a RIO device by vid/did | |
1276 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1277 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1278 | * @from: Previous RIO device found in search, or %NULL for new search | |
1279 | * | |
1280 | * Iterates through the list of known RIO devices. If a RIO device is | |
1281 | * found with a matching @vid and @did, the reference count to the | |
1282 | * device is incrememted and a pointer to its device structure is returned. | |
1283 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL | |
1284 | * to the @from argument. Otherwise, if @from is not %NULL, searches | |
1285 | * continue from next device on the global list. The reference count for | |
1286 | * @from is always decremented if it is not %NULL. | |
1287 | */ | |
1288 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) | |
1289 | { | |
1290 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); | |
1291 | } | |
1292 | ||
07590ff0 AB |
1293 | /** |
1294 | * rio_std_route_add_entry - Add switch route table entry using standard | |
1295 | * registers defined in RIO specification rev.1.3 | |
1296 | * @mport: Master port to issue transaction | |
1297 | * @destid: Destination ID of the device | |
1298 | * @hopcount: Number of switch hops to the device | |
1299 | * @table: routing table ID (global or port-specific) | |
1300 | * @route_destid: destID entry in the RT | |
1301 | * @route_port: destination port for specified destID | |
1302 | */ | |
2ec3ba69 AB |
1303 | static int |
1304 | rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1305 | u16 table, u16 route_destid, u8 route_port) | |
07590ff0 AB |
1306 | { |
1307 | if (table == RIO_GLOBAL_TABLE) { | |
1308 | rio_mport_write_config_32(mport, destid, hopcount, | |
1309 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1310 | (u32)route_destid); | |
1311 | rio_mport_write_config_32(mport, destid, hopcount, | |
1312 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1313 | (u32)route_port); | |
1314 | } | |
e5cabeb3 | 1315 | |
07590ff0 AB |
1316 | udelay(10); |
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | /** | |
1321 | * rio_std_route_get_entry - Read switch route table entry (port number) | |
638c5945 | 1322 | * associated with specified destID using standard registers defined in RIO |
07590ff0 AB |
1323 | * specification rev.1.3 |
1324 | * @mport: Master port to issue transaction | |
1325 | * @destid: Destination ID of the device | |
1326 | * @hopcount: Number of switch hops to the device | |
1327 | * @table: routing table ID (global or port-specific) | |
1328 | * @route_destid: destID entry in the RT | |
1329 | * @route_port: returned destination port for specified destID | |
1330 | */ | |
2ec3ba69 AB |
1331 | static int |
1332 | rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1333 | u16 table, u16 route_destid, u8 *route_port) | |
07590ff0 AB |
1334 | { |
1335 | u32 result; | |
1336 | ||
1337 | if (table == RIO_GLOBAL_TABLE) { | |
1338 | rio_mport_write_config_32(mport, destid, hopcount, | |
1339 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); | |
1340 | rio_mport_read_config_32(mport, destid, hopcount, | |
1341 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); | |
1342 | ||
1343 | *route_port = (u8)result; | |
1344 | } | |
1345 | ||
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | /** | |
1350 | * rio_std_route_clr_table - Clear swotch route table using standard registers | |
1351 | * defined in RIO specification rev.1.3. | |
1352 | * @mport: Master port to issue transaction | |
07590ff0 AB |
1353 | * @destid: Destination ID of the device |
1354 | * @hopcount: Number of switch hops to the device | |
1355 | * @table: routing table ID (global or port-specific) | |
1356 | */ | |
2ec3ba69 AB |
1357 | static int |
1358 | rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1359 | u16 table) | |
07590ff0 AB |
1360 | { |
1361 | u32 max_destid = 0xff; | |
1362 | u32 i, pef, id_inc = 1, ext_cfg = 0; | |
1363 | u32 port_sel = RIO_INVALID_ROUTE; | |
1364 | ||
1365 | if (table == RIO_GLOBAL_TABLE) { | |
1366 | rio_mport_read_config_32(mport, destid, hopcount, | |
1367 | RIO_PEF_CAR, &pef); | |
1368 | ||
1369 | if (mport->sys_size) { | |
1370 | rio_mport_read_config_32(mport, destid, hopcount, | |
1371 | RIO_SWITCH_RT_LIMIT, | |
1372 | &max_destid); | |
1373 | max_destid &= RIO_RT_MAX_DESTID; | |
1374 | } | |
1375 | ||
1376 | if (pef & RIO_PEF_EXT_RT) { | |
1377 | ext_cfg = 0x80000000; | |
1378 | id_inc = 4; | |
1379 | port_sel = (RIO_INVALID_ROUTE << 24) | | |
1380 | (RIO_INVALID_ROUTE << 16) | | |
1381 | (RIO_INVALID_ROUTE << 8) | | |
1382 | RIO_INVALID_ROUTE; | |
1383 | } | |
1384 | ||
1385 | for (i = 0; i <= max_destid;) { | |
1386 | rio_mport_write_config_32(mport, destid, hopcount, | |
1387 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1388 | ext_cfg | i); | |
1389 | rio_mport_write_config_32(mport, destid, hopcount, | |
1390 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1391 | port_sel); | |
1392 | i += id_inc; | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | udelay(10); | |
1397 | return 0; | |
1398 | } | |
1399 | ||
2ec3ba69 AB |
1400 | /** |
1401 | * rio_lock_device - Acquires host device lock for specified device | |
1402 | * @port: Master port to send transaction | |
1403 | * @destid: Destination ID for device/switch | |
1404 | * @hopcount: Hopcount to reach switch | |
1405 | * @wait_ms: Max wait time in msec (0 = no timeout) | |
1406 | * | |
1407 | * Attepts to acquire host device lock for specified device | |
1408 | * Returns 0 if device lock acquired or EINVAL if timeout expires. | |
1409 | */ | |
1410 | int rio_lock_device(struct rio_mport *port, u16 destid, | |
1411 | u8 hopcount, int wait_ms) | |
1412 | { | |
1413 | u32 result; | |
1414 | int tcnt = 0; | |
1415 | ||
1416 | /* Attempt to acquire device lock */ | |
1417 | rio_mport_write_config_32(port, destid, hopcount, | |
1418 | RIO_HOST_DID_LOCK_CSR, port->host_deviceid); | |
1419 | rio_mport_read_config_32(port, destid, hopcount, | |
1420 | RIO_HOST_DID_LOCK_CSR, &result); | |
1421 | ||
1422 | while (result != port->host_deviceid) { | |
1423 | if (wait_ms != 0 && tcnt == wait_ms) { | |
1424 | pr_debug("RIO: timeout when locking device %x:%x\n", | |
1425 | destid, hopcount); | |
1426 | return -EINVAL; | |
1427 | } | |
1428 | ||
1429 | /* Delay a bit */ | |
1430 | mdelay(1); | |
1431 | tcnt++; | |
1432 | /* Try to acquire device lock again */ | |
1433 | rio_mport_write_config_32(port, destid, | |
1434 | hopcount, | |
1435 | RIO_HOST_DID_LOCK_CSR, | |
1436 | port->host_deviceid); | |
1437 | rio_mport_read_config_32(port, destid, | |
1438 | hopcount, | |
1439 | RIO_HOST_DID_LOCK_CSR, &result); | |
1440 | } | |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | EXPORT_SYMBOL_GPL(rio_lock_device); | |
1445 | ||
1446 | /** | |
1447 | * rio_unlock_device - Releases host device lock for specified device | |
1448 | * @port: Master port to send transaction | |
1449 | * @destid: Destination ID for device/switch | |
1450 | * @hopcount: Hopcount to reach switch | |
1451 | * | |
1452 | * Returns 0 if device lock released or EINVAL if fails. | |
1453 | */ | |
1454 | int rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount) | |
1455 | { | |
1456 | u32 result; | |
1457 | ||
1458 | /* Release device lock */ | |
1459 | rio_mport_write_config_32(port, destid, | |
1460 | hopcount, | |
1461 | RIO_HOST_DID_LOCK_CSR, | |
1462 | port->host_deviceid); | |
1463 | rio_mport_read_config_32(port, destid, hopcount, | |
1464 | RIO_HOST_DID_LOCK_CSR, &result); | |
1465 | if ((result & 0xffff) != 0xffff) { | |
1466 | pr_debug("RIO: badness when releasing device lock %x:%x\n", | |
1467 | destid, hopcount); | |
1468 | return -EINVAL; | |
1469 | } | |
1470 | ||
1471 | return 0; | |
1472 | } | |
1473 | EXPORT_SYMBOL_GPL(rio_unlock_device); | |
1474 | ||
1475 | /** | |
1476 | * rio_route_add_entry- Add a route entry to a switch routing table | |
1477 | * @rdev: RIO device | |
1478 | * @table: Routing table ID | |
1479 | * @route_destid: Destination ID to be routed | |
1480 | * @route_port: Port number to be routed | |
1481 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1482 | * | |
1483 | * If available calls the switch specific add_entry() method to add a route | |
1484 | * entry into a switch routing table. Otherwise uses standard RT update method | |
1485 | * as defined by RapidIO specification. A specific routing table can be selected | |
1486 | * using the @table argument if a switch has per port routing tables or | |
1487 | * the standard (or global) table may be used by passing | |
1488 | * %RIO_GLOBAL_TABLE in @table. | |
1489 | * | |
1490 | * Returns %0 on success or %-EINVAL on failure. | |
1491 | */ | |
1492 | int rio_route_add_entry(struct rio_dev *rdev, | |
1493 | u16 table, u16 route_destid, u8 route_port, int lock) | |
1494 | { | |
1495 | int rc = -EINVAL; | |
1496 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1497 | ||
1498 | if (lock) { | |
1499 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1500 | rdev->hopcount, 1000); | |
1501 | if (rc) | |
1502 | return rc; | |
1503 | } | |
1504 | ||
1505 | spin_lock(&rdev->rswitch->lock); | |
1506 | ||
1507 | if (ops == NULL || ops->add_entry == NULL) { | |
1508 | rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid, | |
1509 | rdev->hopcount, table, | |
1510 | route_destid, route_port); | |
1511 | } else if (try_module_get(ops->owner)) { | |
1512 | rc = ops->add_entry(rdev->net->hport, rdev->destid, | |
1513 | rdev->hopcount, table, route_destid, | |
1514 | route_port); | |
1515 | module_put(ops->owner); | |
1516 | } | |
1517 | ||
1518 | spin_unlock(&rdev->rswitch->lock); | |
1519 | ||
1520 | if (lock) | |
1521 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1522 | rdev->hopcount); | |
1523 | ||
1524 | return rc; | |
1525 | } | |
1526 | EXPORT_SYMBOL_GPL(rio_route_add_entry); | |
1527 | ||
1528 | /** | |
1529 | * rio_route_get_entry- Read an entry from a switch routing table | |
1530 | * @rdev: RIO device | |
1531 | * @table: Routing table ID | |
1532 | * @route_destid: Destination ID to be routed | |
1533 | * @route_port: Pointer to read port number into | |
1534 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1535 | * | |
1536 | * If available calls the switch specific get_entry() method to fetch a route | |
1537 | * entry from a switch routing table. Otherwise uses standard RT read method | |
1538 | * as defined by RapidIO specification. A specific routing table can be selected | |
1539 | * using the @table argument if a switch has per port routing tables or | |
1540 | * the standard (or global) table may be used by passing | |
1541 | * %RIO_GLOBAL_TABLE in @table. | |
1542 | * | |
1543 | * Returns %0 on success or %-EINVAL on failure. | |
1544 | */ | |
1545 | int rio_route_get_entry(struct rio_dev *rdev, u16 table, | |
1546 | u16 route_destid, u8 *route_port, int lock) | |
1547 | { | |
1548 | int rc = -EINVAL; | |
1549 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1550 | ||
1551 | if (lock) { | |
1552 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1553 | rdev->hopcount, 1000); | |
1554 | if (rc) | |
1555 | return rc; | |
1556 | } | |
1557 | ||
1558 | spin_lock(&rdev->rswitch->lock); | |
1559 | ||
1560 | if (ops == NULL || ops->get_entry == NULL) { | |
1561 | rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid, | |
1562 | rdev->hopcount, table, | |
1563 | route_destid, route_port); | |
1564 | } else if (try_module_get(ops->owner)) { | |
1565 | rc = ops->get_entry(rdev->net->hport, rdev->destid, | |
1566 | rdev->hopcount, table, route_destid, | |
1567 | route_port); | |
1568 | module_put(ops->owner); | |
1569 | } | |
1570 | ||
1571 | spin_unlock(&rdev->rswitch->lock); | |
1572 | ||
1573 | if (lock) | |
1574 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1575 | rdev->hopcount); | |
1576 | return rc; | |
1577 | } | |
1578 | EXPORT_SYMBOL_GPL(rio_route_get_entry); | |
1579 | ||
1580 | /** | |
1581 | * rio_route_clr_table - Clear a switch routing table | |
1582 | * @rdev: RIO device | |
1583 | * @table: Routing table ID | |
1584 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1585 | * | |
1586 | * If available calls the switch specific clr_table() method to clear a switch | |
1587 | * routing table. Otherwise uses standard RT write method as defined by RapidIO | |
1588 | * specification. A specific routing table can be selected using the @table | |
1589 | * argument if a switch has per port routing tables or the standard (or global) | |
1590 | * table may be used by passing %RIO_GLOBAL_TABLE in @table. | |
1591 | * | |
1592 | * Returns %0 on success or %-EINVAL on failure. | |
1593 | */ | |
1594 | int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock) | |
1595 | { | |
1596 | int rc = -EINVAL; | |
1597 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1598 | ||
1599 | if (lock) { | |
1600 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1601 | rdev->hopcount, 1000); | |
1602 | if (rc) | |
1603 | return rc; | |
1604 | } | |
1605 | ||
1606 | spin_lock(&rdev->rswitch->lock); | |
1607 | ||
1608 | if (ops == NULL || ops->clr_table == NULL) { | |
1609 | rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid, | |
1610 | rdev->hopcount, table); | |
1611 | } else if (try_module_get(ops->owner)) { | |
1612 | rc = ops->clr_table(rdev->net->hport, rdev->destid, | |
1613 | rdev->hopcount, table); | |
1614 | ||
1615 | module_put(ops->owner); | |
1616 | } | |
1617 | ||
1618 | spin_unlock(&rdev->rswitch->lock); | |
1619 | ||
1620 | if (lock) | |
1621 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1622 | rdev->hopcount); | |
1623 | ||
1624 | return rc; | |
1625 | } | |
1626 | EXPORT_SYMBOL_GPL(rio_route_clr_table); | |
1627 | ||
e42d98eb AB |
1628 | #ifdef CONFIG_RAPIDIO_DMA_ENGINE |
1629 | ||
1630 | static bool rio_chan_filter(struct dma_chan *chan, void *arg) | |
1631 | { | |
4aff1ce7 | 1632 | struct rio_mport *mport = arg; |
e42d98eb AB |
1633 | |
1634 | /* Check that DMA device belongs to the right MPORT */ | |
4aff1ce7 | 1635 | return mport == container_of(chan->device, struct rio_mport, dma); |
e42d98eb AB |
1636 | } |
1637 | ||
1638 | /** | |
4aff1ce7 AB |
1639 | * rio_request_mport_dma - request RapidIO capable DMA channel associated |
1640 | * with specified local RapidIO mport device. | |
1641 | * @mport: RIO mport to perform DMA data transfers | |
e42d98eb AB |
1642 | * |
1643 | * Returns pointer to allocated DMA channel or NULL if failed. | |
1644 | */ | |
4aff1ce7 | 1645 | struct dma_chan *rio_request_mport_dma(struct rio_mport *mport) |
e42d98eb AB |
1646 | { |
1647 | dma_cap_mask_t mask; | |
e42d98eb AB |
1648 | |
1649 | dma_cap_zero(mask); | |
1650 | dma_cap_set(DMA_SLAVE, mask); | |
4aff1ce7 AB |
1651 | return dma_request_channel(mask, rio_chan_filter, mport); |
1652 | } | |
1653 | EXPORT_SYMBOL_GPL(rio_request_mport_dma); | |
e42d98eb | 1654 | |
4aff1ce7 AB |
1655 | /** |
1656 | * rio_request_dma - request RapidIO capable DMA channel that supports | |
1657 | * specified target RapidIO device. | |
1658 | * @rdev: RIO device associated with DMA transfer | |
1659 | * | |
1660 | * Returns pointer to allocated DMA channel or NULL if failed. | |
1661 | */ | |
1662 | struct dma_chan *rio_request_dma(struct rio_dev *rdev) | |
1663 | { | |
1664 | return rio_request_mport_dma(rdev->net->hport); | |
e42d98eb AB |
1665 | } |
1666 | EXPORT_SYMBOL_GPL(rio_request_dma); | |
1667 | ||
1668 | /** | |
1669 | * rio_release_dma - release specified DMA channel | |
1670 | * @dchan: DMA channel to release | |
1671 | */ | |
1672 | void rio_release_dma(struct dma_chan *dchan) | |
1673 | { | |
1674 | dma_release_channel(dchan); | |
1675 | } | |
1676 | EXPORT_SYMBOL_GPL(rio_release_dma); | |
1677 | ||
1678 | /** | |
4aff1ce7 | 1679 | * rio_dma_prep_xfer - RapidIO specific wrapper |
e42d98eb | 1680 | * for device_prep_slave_sg callback defined by DMAENGINE. |
e42d98eb | 1681 | * @dchan: DMA channel to configure |
4aff1ce7 | 1682 | * @destid: target RapidIO device destination ID |
e42d98eb AB |
1683 | * @data: RIO specific data descriptor |
1684 | * @direction: DMA data transfer direction (TO or FROM the device) | |
1685 | * @flags: dmaengine defined flags | |
1686 | * | |
1687 | * Initializes RapidIO capable DMA channel for the specified data transfer. | |
1688 | * Uses DMA channel private extension to pass information related to remote | |
1689 | * target RIO device. | |
1690 | * Returns pointer to DMA transaction descriptor or NULL if failed. | |
1691 | */ | |
4aff1ce7 AB |
1692 | struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan, |
1693 | u16 destid, struct rio_dma_data *data, | |
e42d98eb AB |
1694 | enum dma_transfer_direction direction, unsigned long flags) |
1695 | { | |
e42d98eb AB |
1696 | struct rio_dma_ext rio_ext; |
1697 | ||
1698 | if (dchan->device->device_prep_slave_sg == NULL) { | |
1699 | pr_err("%s: prep_rio_sg == NULL\n", __func__); | |
1700 | return NULL; | |
1701 | } | |
1702 | ||
4aff1ce7 | 1703 | rio_ext.destid = destid; |
e42d98eb AB |
1704 | rio_ext.rio_addr_u = data->rio_addr_u; |
1705 | rio_ext.rio_addr = data->rio_addr; | |
1706 | rio_ext.wr_type = data->wr_type; | |
1707 | ||
4aff1ce7 AB |
1708 | return dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len, |
1709 | direction, flags, &rio_ext); | |
1710 | } | |
1711 | EXPORT_SYMBOL_GPL(rio_dma_prep_xfer); | |
e42d98eb | 1712 | |
4aff1ce7 AB |
1713 | /** |
1714 | * rio_dma_prep_slave_sg - RapidIO specific wrapper | |
1715 | * for device_prep_slave_sg callback defined by DMAENGINE. | |
1716 | * @rdev: RIO device control structure | |
1717 | * @dchan: DMA channel to configure | |
1718 | * @data: RIO specific data descriptor | |
1719 | * @direction: DMA data transfer direction (TO or FROM the device) | |
1720 | * @flags: dmaengine defined flags | |
1721 | * | |
1722 | * Initializes RapidIO capable DMA channel for the specified data transfer. | |
1723 | * Uses DMA channel private extension to pass information related to remote | |
1724 | * target RIO device. | |
1725 | * Returns pointer to DMA transaction descriptor or NULL if failed. | |
1726 | */ | |
1727 | struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev, | |
1728 | struct dma_chan *dchan, struct rio_dma_data *data, | |
1729 | enum dma_transfer_direction direction, unsigned long flags) | |
1730 | { | |
1731 | return rio_dma_prep_xfer(dchan, rdev->destid, data, direction, flags); | |
e42d98eb AB |
1732 | } |
1733 | EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg); | |
1734 | ||
1735 | #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ | |
1736 | ||
bc8fcfea AB |
1737 | /** |
1738 | * rio_find_mport - find RIO mport by its ID | |
1739 | * @mport_id: number (ID) of mport device | |
1740 | * | |
1741 | * Given a RIO mport number, the desired mport is located | |
1742 | * in the global list of mports. If the mport is found, a pointer to its | |
1743 | * data structure is returned. If no mport is found, %NULL is returned. | |
1744 | */ | |
1745 | struct rio_mport *rio_find_mport(int mport_id) | |
1746 | { | |
1747 | struct rio_mport *port; | |
1748 | ||
1749 | mutex_lock(&rio_mport_list_lock); | |
1750 | list_for_each_entry(port, &rio_mports, node) { | |
1751 | if (port->id == mport_id) | |
1752 | goto found; | |
1753 | } | |
1754 | port = NULL; | |
1755 | found: | |
1756 | mutex_unlock(&rio_mport_list_lock); | |
1757 | ||
1758 | return port; | |
1759 | } | |
1760 | ||
a11650e1 AB |
1761 | /** |
1762 | * rio_register_scan - enumeration/discovery method registration interface | |
1763 | * @mport_id: mport device ID for which fabric scan routine has to be set | |
1764 | * (RIO_MPORT_ANY = set for all available mports) | |
9edbc30b AB |
1765 | * @scan_ops: enumeration/discovery operations structure |
1766 | * | |
1767 | * Registers enumeration/discovery operations with RapidIO subsystem and | |
1768 | * attaches it to the specified mport device (or all available mports | |
1769 | * if RIO_MPORT_ANY is specified). | |
a11650e1 | 1770 | * |
a11650e1 | 1771 | * Returns error if the mport already has an enumerator attached to it. |
9edbc30b | 1772 | * In case of RIO_MPORT_ANY skips mports with valid scan routines (no error). |
a11650e1 AB |
1773 | */ |
1774 | int rio_register_scan(int mport_id, struct rio_scan *scan_ops) | |
1775 | { | |
1776 | struct rio_mport *port; | |
9edbc30b AB |
1777 | struct rio_scan_node *scan; |
1778 | int rc = 0; | |
a11650e1 | 1779 | |
9edbc30b | 1780 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); |
a11650e1 | 1781 | |
9edbc30b AB |
1782 | if ((mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) || |
1783 | !scan_ops) | |
1784 | return -EINVAL; | |
a11650e1 | 1785 | |
9edbc30b AB |
1786 | mutex_lock(&rio_mport_list_lock); |
1787 | ||
1788 | /* | |
1789 | * Check if there is another enumerator already registered for | |
1790 | * the same mport ID (including RIO_MPORT_ANY). Multiple enumerators | |
1791 | * for the same mport ID are not supported. | |
1792 | */ | |
1793 | list_for_each_entry(scan, &rio_scans, node) { | |
1794 | if (scan->mport_id == mport_id) { | |
1795 | rc = -EBUSY; | |
1796 | goto err_out; | |
a11650e1 AB |
1797 | } |
1798 | } | |
9edbc30b AB |
1799 | |
1800 | /* | |
1801 | * Allocate and initialize new scan registration node. | |
1802 | */ | |
1803 | scan = kzalloc(sizeof(*scan), GFP_KERNEL); | |
1804 | if (!scan) { | |
1805 | rc = -ENOMEM; | |
1806 | goto err_out; | |
1807 | } | |
1808 | ||
1809 | scan->mport_id = mport_id; | |
1810 | scan->ops = scan_ops; | |
1811 | ||
1812 | /* | |
1813 | * Traverse the list of registered mports to attach this new scan. | |
1814 | * | |
1815 | * The new scan with matching mport ID overrides any previously attached | |
1816 | * scan assuming that old scan (if any) is the default one (based on the | |
1817 | * enumerator registration check above). | |
1818 | * If the new scan is the global one, it will be attached only to mports | |
1819 | * that do not have their own individual operations already attached. | |
1820 | */ | |
1821 | list_for_each_entry(port, &rio_mports, node) { | |
1822 | if (port->id == mport_id) { | |
1823 | port->nscan = scan_ops; | |
1824 | break; | |
1825 | } else if (mport_id == RIO_MPORT_ANY && !port->nscan) | |
1826 | port->nscan = scan_ops; | |
1827 | } | |
1828 | ||
1829 | list_add_tail(&scan->node, &rio_scans); | |
1830 | ||
1831 | err_out: | |
a11650e1 AB |
1832 | mutex_unlock(&rio_mport_list_lock); |
1833 | ||
1834 | return rc; | |
1835 | } | |
1836 | EXPORT_SYMBOL_GPL(rio_register_scan); | |
1837 | ||
1838 | /** | |
1839 | * rio_unregister_scan - removes enumeration/discovery method from mport | |
1840 | * @mport_id: mport device ID for which fabric scan routine has to be | |
9edbc30b AB |
1841 | * unregistered (RIO_MPORT_ANY = apply to all mports that use |
1842 | * the specified scan_ops) | |
1843 | * @scan_ops: enumeration/discovery operations structure | |
a11650e1 AB |
1844 | * |
1845 | * Removes enumeration or discovery method assigned to the specified mport | |
9edbc30b AB |
1846 | * device. If RIO_MPORT_ANY is specified, removes the specified operations from |
1847 | * all mports that have them attached. | |
a11650e1 | 1848 | */ |
9edbc30b | 1849 | int rio_unregister_scan(int mport_id, struct rio_scan *scan_ops) |
a11650e1 AB |
1850 | { |
1851 | struct rio_mport *port; | |
9edbc30b AB |
1852 | struct rio_scan_node *scan; |
1853 | ||
1854 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); | |
1855 | ||
1856 | if (mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) | |
1857 | return -EINVAL; | |
a11650e1 AB |
1858 | |
1859 | mutex_lock(&rio_mport_list_lock); | |
9edbc30b AB |
1860 | |
1861 | list_for_each_entry(port, &rio_mports, node) | |
1862 | if (port->id == mport_id || | |
1863 | (mport_id == RIO_MPORT_ANY && port->nscan == scan_ops)) | |
1864 | port->nscan = NULL; | |
1865 | ||
f93f3c4e | 1866 | list_for_each_entry(scan, &rio_scans, node) { |
9edbc30b AB |
1867 | if (scan->mport_id == mport_id) { |
1868 | list_del(&scan->node); | |
1869 | kfree(scan); | |
f93f3c4e | 1870 | break; |
a11650e1 | 1871 | } |
f93f3c4e | 1872 | } |
9edbc30b | 1873 | |
a11650e1 AB |
1874 | mutex_unlock(&rio_mport_list_lock); |
1875 | ||
1876 | return 0; | |
1877 | } | |
1878 | EXPORT_SYMBOL_GPL(rio_unregister_scan); | |
1879 | ||
9edbc30b AB |
1880 | /** |
1881 | * rio_mport_scan - execute enumeration/discovery on the specified mport | |
1882 | * @mport_id: number (ID) of mport device | |
1883 | */ | |
1884 | int rio_mport_scan(int mport_id) | |
1885 | { | |
1886 | struct rio_mport *port = NULL; | |
1887 | int rc; | |
1888 | ||
1889 | mutex_lock(&rio_mport_list_lock); | |
1890 | list_for_each_entry(port, &rio_mports, node) { | |
1891 | if (port->id == mport_id) | |
1892 | goto found; | |
1893 | } | |
1894 | mutex_unlock(&rio_mport_list_lock); | |
1895 | return -ENODEV; | |
1896 | found: | |
1897 | if (!port->nscan) { | |
1898 | mutex_unlock(&rio_mport_list_lock); | |
1899 | return -EINVAL; | |
1900 | } | |
1901 | ||
1902 | if (!try_module_get(port->nscan->owner)) { | |
1903 | mutex_unlock(&rio_mport_list_lock); | |
1904 | return -ENODEV; | |
1905 | } | |
1906 | ||
1907 | mutex_unlock(&rio_mport_list_lock); | |
1908 | ||
1909 | if (port->host_deviceid >= 0) | |
1910 | rc = port->nscan->enumerate(port, 0); | |
1911 | else | |
1912 | rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT); | |
1913 | ||
1914 | module_put(port->nscan->owner); | |
1915 | return rc; | |
1916 | } | |
1917 | ||
394b701c MP |
1918 | static void rio_fixup_device(struct rio_dev *dev) |
1919 | { | |
1920 | } | |
1921 | ||
305c891e | 1922 | static int rio_init(void) |
394b701c MP |
1923 | { |
1924 | struct rio_dev *dev = NULL; | |
1925 | ||
1926 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { | |
1927 | rio_fixup_device(dev); | |
1928 | } | |
1929 | return 0; | |
1930 | } | |
1931 | ||
005842ef AB |
1932 | static struct workqueue_struct *rio_wq; |
1933 | ||
1934 | struct rio_disc_work { | |
1935 | struct work_struct work; | |
1936 | struct rio_mport *mport; | |
1937 | }; | |
1938 | ||
305c891e | 1939 | static void disc_work_handler(struct work_struct *_work) |
005842ef AB |
1940 | { |
1941 | struct rio_disc_work *work; | |
1942 | ||
1943 | work = container_of(_work, struct rio_disc_work, work); | |
1944 | pr_debug("RIO: discovery work for mport %d %s\n", | |
1945 | work->mport->id, work->mport->name); | |
9edbc30b AB |
1946 | if (try_module_get(work->mport->nscan->owner)) { |
1947 | work->mport->nscan->discover(work->mport, 0); | |
1948 | module_put(work->mport->nscan->owner); | |
1949 | } | |
005842ef AB |
1950 | } |
1951 | ||
305c891e | 1952 | int rio_init_mports(void) |
394b701c | 1953 | { |
394b701c | 1954 | struct rio_mport *port; |
005842ef | 1955 | struct rio_disc_work *work; |
2574740d AB |
1956 | int n = 0; |
1957 | ||
1958 | if (!next_portid) | |
1959 | return -ENODEV; | |
394b701c | 1960 | |
2574740d AB |
1961 | /* |
1962 | * First, run enumerations and check if we need to perform discovery | |
1963 | * on any of the registered mports. | |
1964 | */ | |
a11650e1 | 1965 | mutex_lock(&rio_mport_list_lock); |
394b701c | 1966 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 | 1967 | if (port->host_deviceid >= 0) { |
9edbc30b | 1968 | if (port->nscan && try_module_get(port->nscan->owner)) { |
bc8fcfea | 1969 | port->nscan->enumerate(port, 0); |
9edbc30b AB |
1970 | module_put(port->nscan->owner); |
1971 | } | |
a11650e1 | 1972 | } else |
2574740d AB |
1973 | n++; |
1974 | } | |
a11650e1 | 1975 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
1976 | |
1977 | if (!n) | |
1978 | goto no_disc; | |
1979 | ||
1980 | /* | |
1981 | * If we have mports that require discovery schedule a discovery work | |
1982 | * for each of them. If the code below fails to allocate needed | |
1983 | * resources, exit without error to keep results of enumeration | |
1984 | * process (if any). | |
9edbc30b | 1985 | * TODO: Implement restart of discovery process for all or |
2574740d AB |
1986 | * individual discovering mports. |
1987 | */ | |
1988 | rio_wq = alloc_workqueue("riodisc", 0, 0); | |
1989 | if (!rio_wq) { | |
1990 | pr_err("RIO: unable allocate rio_wq\n"); | |
1991 | goto no_disc; | |
005842ef AB |
1992 | } |
1993 | ||
2574740d AB |
1994 | work = kcalloc(n, sizeof *work, GFP_KERNEL); |
1995 | if (!work) { | |
1996 | pr_err("RIO: no memory for work struct\n"); | |
005842ef | 1997 | destroy_workqueue(rio_wq); |
2574740d | 1998 | goto no_disc; |
394b701c MP |
1999 | } |
2000 | ||
2574740d | 2001 | n = 0; |
a11650e1 | 2002 | mutex_lock(&rio_mport_list_lock); |
2574740d | 2003 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 | 2004 | if (port->host_deviceid < 0 && port->nscan) { |
2574740d AB |
2005 | work[n].mport = port; |
2006 | INIT_WORK(&work[n].work, disc_work_handler); | |
2007 | queue_work(rio_wq, &work[n].work); | |
2008 | n++; | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | flush_workqueue(rio_wq); | |
9edbc30b | 2013 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
2014 | pr_debug("RIO: destroy discovery workqueue\n"); |
2015 | destroy_workqueue(rio_wq); | |
2016 | kfree(work); | |
2017 | ||
2018 | no_disc: | |
2f809985 AB |
2019 | rio_init(); |
2020 | ||
c1256ebe | 2021 | return 0; |
394b701c MP |
2022 | } |
2023 | ||
569fccb6 AB |
2024 | static int rio_get_hdid(int index) |
2025 | { | |
fdf90abc | 2026 | if (ids_num == 0 || ids_num <= index || index >= RIO_MAX_MPORTS) |
569fccb6 AB |
2027 | return -1; |
2028 | ||
fdf90abc | 2029 | return hdid[index]; |
569fccb6 AB |
2030 | } |
2031 | ||
b77a2030 | 2032 | int rio_mport_initialize(struct rio_mport *mport) |
394b701c | 2033 | { |
569fccb6 AB |
2034 | if (next_portid >= RIO_MAX_MPORTS) { |
2035 | pr_err("RIO: reached specified max number of mports\n"); | |
b77a2030 | 2036 | return -ENODEV; |
569fccb6 AB |
2037 | } |
2038 | ||
b77a2030 AB |
2039 | atomic_set(&mport->state, RIO_DEVICE_INITIALIZING); |
2040 | mport->id = next_portid++; | |
2041 | mport->host_deviceid = rio_get_hdid(mport->id); | |
2042 | mport->nscan = NULL; | |
a7b4c636 | 2043 | mutex_init(&mport->lock); |
9edbc30b | 2044 | |
b77a2030 AB |
2045 | return 0; |
2046 | } | |
2047 | EXPORT_SYMBOL_GPL(rio_mport_initialize); | |
2aaf308b | 2048 | |
b77a2030 AB |
2049 | int rio_register_mport(struct rio_mport *port) |
2050 | { | |
2051 | struct rio_scan_node *scan = NULL; | |
2052 | int res = 0; | |
2aaf308b | 2053 | |
a11650e1 | 2054 | mutex_lock(&rio_mport_list_lock); |
9edbc30b AB |
2055 | |
2056 | /* | |
2057 | * Check if there are any registered enumeration/discovery operations | |
2058 | * that have to be attached to the added mport. | |
2059 | */ | |
2060 | list_for_each_entry(scan, &rio_scans, node) { | |
2061 | if (port->id == scan->mport_id || | |
2062 | scan->mport_id == RIO_MPORT_ANY) { | |
2063 | port->nscan = scan->ops; | |
2064 | if (port->id == scan->mport_id) | |
2065 | break; | |
2066 | } | |
2067 | } | |
b77a2030 AB |
2068 | |
2069 | list_add_tail(&port->node, &rio_mports); | |
a11650e1 | 2070 | mutex_unlock(&rio_mport_list_lock); |
9edbc30b | 2071 | |
b77a2030 AB |
2072 | dev_set_name(&port->dev, "rapidio%d", port->id); |
2073 | port->dev.class = &rio_mport_class; | |
2074 | atomic_set(&port->state, RIO_DEVICE_RUNNING); | |
2075 | ||
2076 | res = device_register(&port->dev); | |
2077 | if (res) | |
2078 | dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n", | |
2079 | port->id, res); | |
2080 | else | |
2081 | dev_dbg(&port->dev, "RIO: registered mport%d\n", port->id); | |
2082 | ||
2083 | return res; | |
2084 | } | |
2085 | EXPORT_SYMBOL_GPL(rio_register_mport); | |
2086 | ||
2087 | static int rio_mport_cleanup_callback(struct device *dev, void *data) | |
2088 | { | |
2089 | struct rio_dev *rdev = to_rio_dev(dev); | |
2090 | ||
2091 | if (dev->bus == &rio_bus_type) | |
2092 | rio_del_device(rdev, RIO_DEVICE_SHUTDOWN); | |
2093 | return 0; | |
2094 | } | |
2095 | ||
2096 | static int rio_net_remove_children(struct rio_net *net) | |
2097 | { | |
2098 | /* | |
2099 | * Unregister all RapidIO devices residing on this net (this will | |
2100 | * invoke notification of registered subsystem interfaces as well). | |
2101 | */ | |
2102 | device_for_each_child(&net->dev, NULL, rio_mport_cleanup_callback); | |
2103 | return 0; | |
2104 | } | |
2105 | ||
2106 | int rio_unregister_mport(struct rio_mport *port) | |
2107 | { | |
9edbc30b | 2108 | pr_debug("RIO: %s %s id=%d\n", __func__, port->name, port->id); |
b77a2030 AB |
2109 | |
2110 | /* Transition mport to the SHUTDOWN state */ | |
2111 | if (atomic_cmpxchg(&port->state, | |
2112 | RIO_DEVICE_RUNNING, | |
2113 | RIO_DEVICE_SHUTDOWN) != RIO_DEVICE_RUNNING) { | |
2114 | pr_err("RIO: %s unexpected state transition for mport %s\n", | |
2115 | __func__, port->name); | |
2116 | } | |
2117 | ||
2118 | if (port->net && port->net->hport == port) { | |
2119 | rio_net_remove_children(port->net); | |
2120 | rio_free_net(port->net); | |
2121 | } | |
2122 | ||
2123 | /* | |
2124 | * Unregister all RapidIO devices attached to this mport (this will | |
2125 | * invoke notification of registered subsystem interfaces as well). | |
2126 | */ | |
2127 | mutex_lock(&rio_mport_list_lock); | |
2128 | list_del(&port->node); | |
2129 | mutex_unlock(&rio_mport_list_lock); | |
2130 | device_unregister(&port->dev); | |
2131 | ||
59f99965 | 2132 | return 0; |
394b701c | 2133 | } |
b77a2030 | 2134 | EXPORT_SYMBOL_GPL(rio_unregister_mport); |
394b701c MP |
2135 | |
2136 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); | |
2137 | EXPORT_SYMBOL_GPL(rio_get_device); | |
2138 | EXPORT_SYMBOL_GPL(rio_get_asm); | |
2139 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); | |
2140 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); | |
2141 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); | |
2142 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); | |
2143 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); | |
2144 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); | |
2145 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); | |
2146 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); | |
a11650e1 | 2147 | EXPORT_SYMBOL_GPL(rio_init_mports); |