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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 | ||
9a0b0627 AB |
33 | /* |
34 | * struct rio_pwrite - RIO portwrite event | |
35 | * @node: Node in list of doorbell events | |
36 | * @pwcback: Doorbell event callback | |
37 | * @context: Handler specific context to pass on event | |
38 | */ | |
39 | struct rio_pwrite { | |
40 | struct list_head node; | |
41 | ||
42 | int (*pwcback)(struct rio_mport *mport, void *context, | |
43 | union rio_pw_msg *msg, int step); | |
44 | void *context; | |
45 | }; | |
46 | ||
fdf90abc AB |
47 | MODULE_DESCRIPTION("RapidIO Subsystem Core"); |
48 | MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>"); | |
49 | MODULE_AUTHOR("Alexandre Bounine <alexandre.bounine@idt.com>"); | |
50 | MODULE_LICENSE("GPL"); | |
51 | ||
52 | static int hdid[RIO_MAX_MPORTS]; | |
53 | static int ids_num; | |
54 | module_param_array(hdid, int, &ids_num, 0); | |
55 | MODULE_PARM_DESC(hdid, | |
56 | "Destination ID assignment to local RapidIO controllers"); | |
57 | ||
a11650e1 | 58 | static LIST_HEAD(rio_devices); |
e6b585ca | 59 | static LIST_HEAD(rio_nets); |
a11650e1 AB |
60 | static DEFINE_SPINLOCK(rio_global_list_lock); |
61 | ||
394b701c | 62 | static LIST_HEAD(rio_mports); |
9edbc30b | 63 | static LIST_HEAD(rio_scans); |
a11650e1 | 64 | static DEFINE_MUTEX(rio_mport_list_lock); |
569fccb6 | 65 | static unsigned char next_portid; |
da1589f0 | 66 | static DEFINE_SPINLOCK(rio_mmap_lock); |
394b701c MP |
67 | |
68 | /** | |
69 | * rio_local_get_device_id - Get the base/extended device id for a port | |
70 | * @port: RIO master port from which to get the deviceid | |
71 | * | |
72 | * Reads the base/extended device id from the local device | |
73 | * implementing the master port. Returns the 8/16-bit device | |
74 | * id. | |
75 | */ | |
76 | u16 rio_local_get_device_id(struct rio_mport *port) | |
77 | { | |
78 | u32 result; | |
79 | ||
80 | rio_local_read_config_32(port, RIO_DID_CSR, &result); | |
81 | ||
e0423236 | 82 | return (RIO_GET_DID(port->sys_size, result)); |
394b701c MP |
83 | } |
84 | ||
8b189fdb AB |
85 | /** |
86 | * rio_query_mport - Query mport device attributes | |
87 | * @port: mport device to query | |
88 | * @mport_attr: mport attributes data structure | |
89 | * | |
90 | * Returns attributes of specified mport through the | |
91 | * pointer to attributes data structure. | |
92 | */ | |
93 | int rio_query_mport(struct rio_mport *port, | |
94 | struct rio_mport_attr *mport_attr) | |
95 | { | |
96 | if (!port->ops->query_mport) | |
97 | return -ENODATA; | |
98 | return port->ops->query_mport(port, mport_attr); | |
99 | } | |
100 | EXPORT_SYMBOL(rio_query_mport); | |
101 | ||
e6b585ca AB |
102 | /** |
103 | * rio_alloc_net- Allocate and initialize a new RIO network data structure | |
104 | * @mport: Master port associated with the RIO network | |
105 | * | |
106 | * Allocates a RIO network structure, initializes per-network | |
107 | * list heads, and adds the associated master port to the | |
108 | * network list of associated master ports. Returns a | |
109 | * RIO network pointer on success or %NULL on failure. | |
110 | */ | |
111 | struct rio_net *rio_alloc_net(struct rio_mport *mport) | |
112 | { | |
113 | struct rio_net *net; | |
114 | ||
115 | net = kzalloc(sizeof(struct rio_net), GFP_KERNEL); | |
116 | if (net) { | |
117 | INIT_LIST_HEAD(&net->node); | |
118 | INIT_LIST_HEAD(&net->devices); | |
119 | INIT_LIST_HEAD(&net->switches); | |
120 | INIT_LIST_HEAD(&net->mports); | |
121 | mport->net = net; | |
122 | } | |
123 | return net; | |
124 | } | |
125 | EXPORT_SYMBOL_GPL(rio_alloc_net); | |
126 | ||
127 | int rio_add_net(struct rio_net *net) | |
128 | { | |
129 | int err; | |
130 | ||
131 | err = device_register(&net->dev); | |
132 | if (err) | |
133 | return err; | |
134 | spin_lock(&rio_global_list_lock); | |
135 | list_add_tail(&net->node, &rio_nets); | |
136 | spin_unlock(&rio_global_list_lock); | |
137 | ||
138 | return 0; | |
139 | } | |
140 | EXPORT_SYMBOL_GPL(rio_add_net); | |
141 | ||
142 | void rio_free_net(struct rio_net *net) | |
143 | { | |
144 | spin_lock(&rio_global_list_lock); | |
145 | if (!list_empty(&net->node)) | |
146 | list_del(&net->node); | |
147 | spin_unlock(&rio_global_list_lock); | |
148 | if (net->release) | |
149 | net->release(net); | |
150 | device_unregister(&net->dev); | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(rio_free_net); | |
153 | ||
5024622f AB |
154 | /** |
155 | * rio_local_set_device_id - Set the base/extended device id for a port | |
156 | * @port: RIO master port | |
157 | * @did: Device ID value to be written | |
158 | * | |
159 | * Writes the base/extended device id from a device. | |
160 | */ | |
161 | void rio_local_set_device_id(struct rio_mport *port, u16 did) | |
162 | { | |
163 | rio_local_write_config_32(port, RIO_DID_CSR, | |
164 | RIO_SET_DID(port->sys_size, did)); | |
165 | } | |
166 | EXPORT_SYMBOL_GPL(rio_local_set_device_id); | |
167 | ||
a11650e1 AB |
168 | /** |
169 | * rio_add_device- Adds a RIO device to the device model | |
170 | * @rdev: RIO device | |
171 | * | |
172 | * Adds the RIO device to the global device list and adds the RIO | |
173 | * device to the RIO device list. Creates the generic sysfs nodes | |
174 | * for an RIO device. | |
175 | */ | |
176 | int rio_add_device(struct rio_dev *rdev) | |
177 | { | |
178 | int err; | |
179 | ||
b77a2030 | 180 | atomic_set(&rdev->state, RIO_DEVICE_RUNNING); |
b74ec56e | 181 | err = device_register(&rdev->dev); |
a11650e1 AB |
182 | if (err) |
183 | return err; | |
184 | ||
185 | spin_lock(&rio_global_list_lock); | |
186 | list_add_tail(&rdev->global_list, &rio_devices); | |
b74ec56e AB |
187 | if (rdev->net) { |
188 | list_add_tail(&rdev->net_list, &rdev->net->devices); | |
189 | if (rdev->pef & RIO_PEF_SWITCH) | |
190 | list_add_tail(&rdev->rswitch->node, | |
191 | &rdev->net->switches); | |
192 | } | |
a11650e1 AB |
193 | spin_unlock(&rio_global_list_lock); |
194 | ||
195 | rio_create_sysfs_dev_files(rdev); | |
196 | ||
197 | return 0; | |
198 | } | |
199 | EXPORT_SYMBOL_GPL(rio_add_device); | |
200 | ||
b74ec56e AB |
201 | /* |
202 | * rio_del_device - removes a RIO device from the device model | |
203 | * @rdev: RIO device | |
b77a2030 | 204 | * @state: device state to set during removal process |
b74ec56e AB |
205 | * |
206 | * Removes the RIO device to the kernel device list and subsystem's device list. | |
207 | * Clears sysfs entries for the removed device. | |
208 | */ | |
b77a2030 | 209 | void rio_del_device(struct rio_dev *rdev, enum rio_device_state state) |
b74ec56e AB |
210 | { |
211 | pr_debug("RIO: %s: removing %s\n", __func__, rio_name(rdev)); | |
b77a2030 | 212 | atomic_set(&rdev->state, state); |
b74ec56e AB |
213 | spin_lock(&rio_global_list_lock); |
214 | list_del(&rdev->global_list); | |
215 | if (rdev->net) { | |
216 | list_del(&rdev->net_list); | |
217 | if (rdev->pef & RIO_PEF_SWITCH) { | |
218 | list_del(&rdev->rswitch->node); | |
219 | kfree(rdev->rswitch->route_table); | |
220 | } | |
221 | } | |
222 | spin_unlock(&rio_global_list_lock); | |
223 | rio_remove_sysfs_dev_files(rdev); | |
224 | device_unregister(&rdev->dev); | |
225 | } | |
226 | EXPORT_SYMBOL_GPL(rio_del_device); | |
227 | ||
394b701c MP |
228 | /** |
229 | * rio_request_inb_mbox - request inbound mailbox service | |
230 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 231 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
232 | * @mbox: Mailbox number to claim |
233 | * @entries: Number of entries in inbound mailbox queue | |
234 | * @minb: Callback to execute when inbound message is received | |
235 | * | |
236 | * Requests ownership of an inbound mailbox resource and binds | |
237 | * a callback function to the resource. Returns %0 on success. | |
238 | */ | |
239 | int rio_request_inb_mbox(struct rio_mport *mport, | |
6978bbc0 | 240 | void *dev_id, |
394b701c MP |
241 | int mbox, |
242 | int entries, | |
6978bbc0 | 243 | void (*minb) (struct rio_mport * mport, void *dev_id, int mbox, |
394b701c MP |
244 | int slot)) |
245 | { | |
f8f06269 AB |
246 | int rc = -ENOSYS; |
247 | struct resource *res; | |
394b701c | 248 | |
f8f06269 AB |
249 | if (mport->ops->open_inb_mbox == NULL) |
250 | goto out; | |
251 | ||
9a975bee | 252 | res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
394b701c MP |
253 | |
254 | if (res) { | |
255 | rio_init_mbox_res(res, mbox, mbox); | |
256 | ||
257 | /* Make sure this mailbox isn't in use */ | |
258 | if ((rc = | |
259 | request_resource(&mport->riores[RIO_INB_MBOX_RESOURCE], | |
260 | res)) < 0) { | |
261 | kfree(res); | |
262 | goto out; | |
263 | } | |
264 | ||
265 | mport->inb_msg[mbox].res = res; | |
266 | ||
267 | /* Hook the inbound message callback */ | |
268 | mport->inb_msg[mbox].mcback = minb; | |
269 | ||
f8f06269 | 270 | rc = mport->ops->open_inb_mbox(mport, dev_id, mbox, entries); |
06e1b249 AB |
271 | if (rc) { |
272 | mport->inb_msg[mbox].mcback = NULL; | |
273 | mport->inb_msg[mbox].res = NULL; | |
274 | release_resource(res); | |
275 | kfree(res); | |
276 | } | |
394b701c MP |
277 | } else |
278 | rc = -ENOMEM; | |
279 | ||
280 | out: | |
281 | return rc; | |
282 | } | |
283 | ||
284 | /** | |
285 | * rio_release_inb_mbox - release inbound mailbox message service | |
286 | * @mport: RIO master port from which to release the mailbox resource | |
287 | * @mbox: Mailbox number to release | |
288 | * | |
289 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
290 | * if the request has been satisfied. | |
291 | */ | |
292 | int rio_release_inb_mbox(struct rio_mport *mport, int mbox) | |
293 | { | |
06e1b249 | 294 | int rc; |
394b701c | 295 | |
06e1b249 AB |
296 | if (!mport->ops->close_inb_mbox || !mport->inb_msg[mbox].res) |
297 | return -EINVAL; | |
298 | ||
299 | mport->ops->close_inb_mbox(mport, mbox); | |
300 | mport->inb_msg[mbox].mcback = NULL; | |
301 | ||
302 | rc = release_resource(mport->inb_msg[mbox].res); | |
303 | if (rc) | |
304 | return rc; | |
305 | ||
306 | kfree(mport->inb_msg[mbox].res); | |
307 | mport->inb_msg[mbox].res = NULL; | |
308 | ||
309 | return 0; | |
394b701c MP |
310 | } |
311 | ||
312 | /** | |
313 | * rio_request_outb_mbox - request outbound mailbox service | |
314 | * @mport: RIO master port from which to allocate the mailbox resource | |
6978bbc0 | 315 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
316 | * @mbox: Mailbox number to claim |
317 | * @entries: Number of entries in outbound mailbox queue | |
318 | * @moutb: Callback to execute when outbound message is sent | |
319 | * | |
320 | * Requests ownership of an outbound mailbox resource and binds | |
321 | * a callback function to the resource. Returns 0 on success. | |
322 | */ | |
323 | int rio_request_outb_mbox(struct rio_mport *mport, | |
6978bbc0 | 324 | void *dev_id, |
394b701c MP |
325 | int mbox, |
326 | int entries, | |
6978bbc0 | 327 | void (*moutb) (struct rio_mport * mport, void *dev_id, int mbox, int slot)) |
394b701c | 328 | { |
f8f06269 AB |
329 | int rc = -ENOSYS; |
330 | struct resource *res; | |
394b701c | 331 | |
f8f06269 AB |
332 | if (mport->ops->open_outb_mbox == NULL) |
333 | goto out; | |
334 | ||
9a975bee | 335 | res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
394b701c MP |
336 | |
337 | if (res) { | |
338 | rio_init_mbox_res(res, mbox, mbox); | |
339 | ||
340 | /* Make sure this outbound mailbox isn't in use */ | |
341 | if ((rc = | |
342 | request_resource(&mport->riores[RIO_OUTB_MBOX_RESOURCE], | |
343 | res)) < 0) { | |
344 | kfree(res); | |
345 | goto out; | |
346 | } | |
347 | ||
348 | mport->outb_msg[mbox].res = res; | |
349 | ||
350 | /* Hook the inbound message callback */ | |
351 | mport->outb_msg[mbox].mcback = moutb; | |
352 | ||
f8f06269 | 353 | rc = mport->ops->open_outb_mbox(mport, dev_id, mbox, entries); |
06e1b249 AB |
354 | if (rc) { |
355 | mport->outb_msg[mbox].mcback = NULL; | |
356 | mport->outb_msg[mbox].res = NULL; | |
357 | release_resource(res); | |
358 | kfree(res); | |
359 | } | |
394b701c MP |
360 | } else |
361 | rc = -ENOMEM; | |
362 | ||
363 | out: | |
364 | return rc; | |
365 | } | |
366 | ||
367 | /** | |
368 | * rio_release_outb_mbox - release outbound mailbox message service | |
369 | * @mport: RIO master port from which to release the mailbox resource | |
370 | * @mbox: Mailbox number to release | |
371 | * | |
372 | * Releases ownership of an inbound mailbox resource. Returns 0 | |
373 | * if the request has been satisfied. | |
374 | */ | |
375 | int rio_release_outb_mbox(struct rio_mport *mport, int mbox) | |
376 | { | |
06e1b249 | 377 | int rc; |
394b701c | 378 | |
06e1b249 AB |
379 | if (!mport->ops->close_outb_mbox || !mport->outb_msg[mbox].res) |
380 | return -EINVAL; | |
381 | ||
382 | mport->ops->close_outb_mbox(mport, mbox); | |
383 | mport->outb_msg[mbox].mcback = NULL; | |
384 | ||
385 | rc = release_resource(mport->outb_msg[mbox].res); | |
386 | if (rc) | |
387 | return rc; | |
388 | ||
389 | kfree(mport->outb_msg[mbox].res); | |
390 | mport->outb_msg[mbox].res = NULL; | |
391 | ||
392 | return 0; | |
394b701c MP |
393 | } |
394 | ||
395 | /** | |
396 | * rio_setup_inb_dbell - bind inbound doorbell callback | |
397 | * @mport: RIO master port to bind the doorbell callback | |
6978bbc0 | 398 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
399 | * @res: Doorbell message resource |
400 | * @dinb: Callback to execute when doorbell is received | |
401 | * | |
402 | * Adds a doorbell resource/callback pair into a port's | |
403 | * doorbell event list. Returns 0 if the request has been | |
404 | * satisfied. | |
405 | */ | |
406 | static int | |
6978bbc0 MP |
407 | rio_setup_inb_dbell(struct rio_mport *mport, void *dev_id, struct resource *res, |
408 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, u16 dst, | |
394b701c MP |
409 | u16 info)) |
410 | { | |
411 | int rc = 0; | |
412 | struct rio_dbell *dbell; | |
413 | ||
414 | if (!(dbell = kmalloc(sizeof(struct rio_dbell), GFP_KERNEL))) { | |
415 | rc = -ENOMEM; | |
416 | goto out; | |
417 | } | |
418 | ||
419 | dbell->res = res; | |
420 | dbell->dinb = dinb; | |
6978bbc0 | 421 | dbell->dev_id = dev_id; |
394b701c | 422 | |
a7b4c636 | 423 | mutex_lock(&mport->lock); |
394b701c | 424 | list_add_tail(&dbell->node, &mport->dbells); |
a7b4c636 | 425 | mutex_unlock(&mport->lock); |
394b701c MP |
426 | |
427 | out: | |
428 | return rc; | |
429 | } | |
430 | ||
431 | /** | |
432 | * rio_request_inb_dbell - request inbound doorbell message service | |
433 | * @mport: RIO master port from which to allocate the doorbell resource | |
6978bbc0 | 434 | * @dev_id: Device specific pointer to pass on event |
394b701c MP |
435 | * @start: Doorbell info range start |
436 | * @end: Doorbell info range end | |
437 | * @dinb: Callback to execute when doorbell is received | |
438 | * | |
439 | * Requests ownership of an inbound doorbell resource and binds | |
440 | * a callback function to the resource. Returns 0 if the request | |
441 | * has been satisfied. | |
442 | */ | |
443 | int rio_request_inb_dbell(struct rio_mport *mport, | |
6978bbc0 | 444 | void *dev_id, |
394b701c MP |
445 | u16 start, |
446 | u16 end, | |
6978bbc0 | 447 | void (*dinb) (struct rio_mport * mport, void *dev_id, u16 src, |
394b701c MP |
448 | u16 dst, u16 info)) |
449 | { | |
450 | int rc = 0; | |
451 | ||
9a975bee | 452 | struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
394b701c MP |
453 | |
454 | if (res) { | |
455 | rio_init_dbell_res(res, start, end); | |
456 | ||
457 | /* Make sure these doorbells aren't in use */ | |
458 | if ((rc = | |
459 | request_resource(&mport->riores[RIO_DOORBELL_RESOURCE], | |
460 | res)) < 0) { | |
461 | kfree(res); | |
462 | goto out; | |
463 | } | |
464 | ||
465 | /* Hook the doorbell callback */ | |
6978bbc0 | 466 | rc = rio_setup_inb_dbell(mport, dev_id, res, dinb); |
394b701c MP |
467 | } else |
468 | rc = -ENOMEM; | |
469 | ||
470 | out: | |
471 | return rc; | |
472 | } | |
473 | ||
474 | /** | |
475 | * rio_release_inb_dbell - release inbound doorbell message service | |
476 | * @mport: RIO master port from which to release the doorbell resource | |
477 | * @start: Doorbell info range start | |
478 | * @end: Doorbell info range end | |
479 | * | |
480 | * Releases ownership of an inbound doorbell resource and removes | |
481 | * callback from the doorbell event list. Returns 0 if the request | |
482 | * has been satisfied. | |
483 | */ | |
484 | int rio_release_inb_dbell(struct rio_mport *mport, u16 start, u16 end) | |
485 | { | |
486 | int rc = 0, found = 0; | |
487 | struct rio_dbell *dbell; | |
488 | ||
a7b4c636 | 489 | mutex_lock(&mport->lock); |
394b701c MP |
490 | list_for_each_entry(dbell, &mport->dbells, node) { |
491 | if ((dbell->res->start == start) && (dbell->res->end == end)) { | |
a7b4c636 | 492 | list_del(&dbell->node); |
394b701c MP |
493 | found = 1; |
494 | break; | |
495 | } | |
496 | } | |
a7b4c636 | 497 | mutex_unlock(&mport->lock); |
394b701c MP |
498 | |
499 | /* If we can't find an exact match, fail */ | |
500 | if (!found) { | |
501 | rc = -EINVAL; | |
502 | goto out; | |
503 | } | |
504 | ||
394b701c MP |
505 | /* Release the doorbell resource */ |
506 | rc = release_resource(dbell->res); | |
507 | ||
508 | /* Free the doorbell event */ | |
509 | kfree(dbell); | |
510 | ||
511 | out: | |
512 | return rc; | |
513 | } | |
514 | ||
515 | /** | |
516 | * rio_request_outb_dbell - request outbound doorbell message range | |
517 | * @rdev: RIO device from which to allocate the doorbell resource | |
518 | * @start: Doorbell message range start | |
519 | * @end: Doorbell message range end | |
520 | * | |
521 | * Requests ownership of a doorbell message range. Returns a resource | |
522 | * if the request has been satisfied or %NULL on failure. | |
523 | */ | |
524 | struct resource *rio_request_outb_dbell(struct rio_dev *rdev, u16 start, | |
525 | u16 end) | |
526 | { | |
9a975bee | 527 | struct resource *res = kzalloc(sizeof(struct resource), GFP_KERNEL); |
394b701c MP |
528 | |
529 | if (res) { | |
530 | rio_init_dbell_res(res, start, end); | |
531 | ||
532 | /* Make sure these doorbells aren't in use */ | |
533 | if (request_resource(&rdev->riores[RIO_DOORBELL_RESOURCE], res) | |
534 | < 0) { | |
535 | kfree(res); | |
536 | res = NULL; | |
537 | } | |
538 | } | |
539 | ||
540 | return res; | |
541 | } | |
542 | ||
543 | /** | |
544 | * rio_release_outb_dbell - release outbound doorbell message range | |
545 | * @rdev: RIO device from which to release the doorbell resource | |
546 | * @res: Doorbell resource to be freed | |
547 | * | |
548 | * Releases ownership of a doorbell message range. Returns 0 if the | |
549 | * request has been satisfied. | |
550 | */ | |
551 | int rio_release_outb_dbell(struct rio_dev *rdev, struct resource *res) | |
552 | { | |
553 | int rc = release_resource(res); | |
554 | ||
555 | kfree(res); | |
556 | ||
557 | return rc; | |
558 | } | |
559 | ||
e5cabeb3 | 560 | /** |
9a0b0627 AB |
561 | * rio_add_mport_pw_handler - add port-write message handler into the list |
562 | * of mport specific pw handlers | |
563 | * @mport: RIO master port to bind the portwrite callback | |
564 | * @context: Handler specific context to pass on event | |
565 | * @pwcback: Callback to execute when portwrite is received | |
566 | * | |
567 | * Returns 0 if the request has been satisfied. | |
568 | */ | |
569 | int rio_add_mport_pw_handler(struct rio_mport *mport, void *context, | |
570 | int (*pwcback)(struct rio_mport *mport, | |
571 | void *context, union rio_pw_msg *msg, int step)) | |
572 | { | |
573 | int rc = 0; | |
574 | struct rio_pwrite *pwrite; | |
575 | ||
576 | pwrite = kzalloc(sizeof(struct rio_pwrite), GFP_KERNEL); | |
577 | if (!pwrite) { | |
578 | rc = -ENOMEM; | |
579 | goto out; | |
580 | } | |
581 | ||
582 | pwrite->pwcback = pwcback; | |
583 | pwrite->context = context; | |
584 | mutex_lock(&mport->lock); | |
585 | list_add_tail(&pwrite->node, &mport->pwrites); | |
586 | mutex_unlock(&mport->lock); | |
587 | out: | |
588 | return rc; | |
589 | } | |
590 | EXPORT_SYMBOL_GPL(rio_add_mport_pw_handler); | |
591 | ||
592 | /** | |
593 | * rio_del_mport_pw_handler - remove port-write message handler from the list | |
594 | * of mport specific pw handlers | |
595 | * @mport: RIO master port to bind the portwrite callback | |
596 | * @context: Registered handler specific context to pass on event | |
597 | * @pwcback: Registered callback function | |
598 | * | |
599 | * Returns 0 if the request has been satisfied. | |
600 | */ | |
601 | int rio_del_mport_pw_handler(struct rio_mport *mport, void *context, | |
602 | int (*pwcback)(struct rio_mport *mport, | |
603 | void *context, union rio_pw_msg *msg, int step)) | |
604 | { | |
605 | int rc = -EINVAL; | |
606 | struct rio_pwrite *pwrite; | |
607 | ||
608 | mutex_lock(&mport->lock); | |
609 | list_for_each_entry(pwrite, &mport->pwrites, node) { | |
610 | if (pwrite->pwcback == pwcback && pwrite->context == context) { | |
611 | list_del(&pwrite->node); | |
612 | kfree(pwrite); | |
613 | rc = 0; | |
614 | break; | |
615 | } | |
616 | } | |
617 | mutex_unlock(&mport->lock); | |
618 | ||
619 | return rc; | |
620 | } | |
621 | EXPORT_SYMBOL_GPL(rio_del_mport_pw_handler); | |
622 | ||
623 | /** | |
624 | * rio_request_inb_pwrite - request inbound port-write message service for | |
625 | * specific RapidIO device | |
97ef6f74 | 626 | * @rdev: RIO device to which register inbound port-write callback routine |
e5cabeb3 AB |
627 | * @pwcback: Callback routine to execute when port-write is received |
628 | * | |
629 | * Binds a port-write callback function to the RapidIO device. | |
630 | * Returns 0 if the request has been satisfied. | |
631 | */ | |
632 | int rio_request_inb_pwrite(struct rio_dev *rdev, | |
633 | int (*pwcback)(struct rio_dev *rdev, union rio_pw_msg *msg, int step)) | |
634 | { | |
635 | int rc = 0; | |
636 | ||
637 | spin_lock(&rio_global_list_lock); | |
638 | if (rdev->pwcback != NULL) | |
639 | rc = -ENOMEM; | |
640 | else | |
641 | rdev->pwcback = pwcback; | |
642 | ||
643 | spin_unlock(&rio_global_list_lock); | |
644 | return rc; | |
645 | } | |
646 | EXPORT_SYMBOL_GPL(rio_request_inb_pwrite); | |
647 | ||
648 | /** | |
649 | * rio_release_inb_pwrite - release inbound port-write message service | |
9a0b0627 | 650 | * associated with specific RapidIO device |
e5cabeb3 AB |
651 | * @rdev: RIO device which registered for inbound port-write callback |
652 | * | |
653 | * Removes callback from the rio_dev structure. Returns 0 if the request | |
654 | * has been satisfied. | |
655 | */ | |
656 | int rio_release_inb_pwrite(struct rio_dev *rdev) | |
657 | { | |
658 | int rc = -ENOMEM; | |
659 | ||
660 | spin_lock(&rio_global_list_lock); | |
661 | if (rdev->pwcback) { | |
662 | rdev->pwcback = NULL; | |
663 | rc = 0; | |
664 | } | |
665 | ||
666 | spin_unlock(&rio_global_list_lock); | |
667 | return rc; | |
668 | } | |
669 | EXPORT_SYMBOL_GPL(rio_release_inb_pwrite); | |
670 | ||
b6cb95e8 AB |
671 | /** |
672 | * rio_pw_enable - Enables/disables port-write handling by a master port | |
673 | * @mport: Master port associated with port-write handling | |
674 | * @enable: 1=enable, 0=disable | |
675 | */ | |
676 | void rio_pw_enable(struct rio_mport *mport, int enable) | |
677 | { | |
678 | if (mport->ops->pwenable) { | |
679 | mutex_lock(&mport->lock); | |
680 | ||
681 | if ((enable && ++mport->pwe_refcnt == 1) || | |
682 | (!enable && mport->pwe_refcnt && --mport->pwe_refcnt == 0)) | |
683 | mport->ops->pwenable(mport, enable); | |
684 | mutex_unlock(&mport->lock); | |
685 | } | |
686 | } | |
687 | EXPORT_SYMBOL_GPL(rio_pw_enable); | |
688 | ||
da1589f0 AB |
689 | /** |
690 | * rio_map_inb_region -- Map inbound memory region. | |
691 | * @mport: Master port. | |
2ca3cb50 | 692 | * @local: physical address of memory region to be mapped |
da1589f0 AB |
693 | * @rbase: RIO base address assigned to this window |
694 | * @size: Size of the memory region | |
695 | * @rflags: Flags for mapping. | |
696 | * | |
697 | * Return: 0 -- Success. | |
698 | * | |
699 | * This function will create the mapping from RIO space to local memory. | |
700 | */ | |
701 | int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local, | |
702 | u64 rbase, u32 size, u32 rflags) | |
703 | { | |
704 | int rc = 0; | |
705 | unsigned long flags; | |
706 | ||
707 | if (!mport->ops->map_inb) | |
708 | return -1; | |
709 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
710 | rc = mport->ops->map_inb(mport, local, rbase, size, rflags); | |
711 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
712 | return rc; | |
713 | } | |
714 | EXPORT_SYMBOL_GPL(rio_map_inb_region); | |
715 | ||
716 | /** | |
717 | * rio_unmap_inb_region -- Unmap the inbound memory region | |
718 | * @mport: Master port | |
719 | * @lstart: physical address of memory region to be unmapped | |
720 | */ | |
721 | void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart) | |
722 | { | |
723 | unsigned long flags; | |
724 | if (!mport->ops->unmap_inb) | |
725 | return; | |
726 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
727 | mport->ops->unmap_inb(mport, lstart); | |
728 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
729 | } | |
730 | EXPORT_SYMBOL_GPL(rio_unmap_inb_region); | |
731 | ||
93bdaca5 AB |
732 | /** |
733 | * rio_map_outb_region -- Map outbound memory region. | |
734 | * @mport: Master port. | |
735 | * @destid: destination id window points to | |
736 | * @rbase: RIO base address window translates to | |
737 | * @size: Size of the memory region | |
738 | * @rflags: Flags for mapping. | |
739 | * @local: physical address of memory region mapped | |
740 | * | |
741 | * Return: 0 -- Success. | |
742 | * | |
743 | * This function will create the mapping from RIO space to local memory. | |
744 | */ | |
745 | int rio_map_outb_region(struct rio_mport *mport, u16 destid, u64 rbase, | |
746 | u32 size, u32 rflags, dma_addr_t *local) | |
747 | { | |
748 | int rc = 0; | |
749 | unsigned long flags; | |
750 | ||
751 | if (!mport->ops->map_outb) | |
752 | return -ENODEV; | |
753 | ||
754 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
755 | rc = mport->ops->map_outb(mport, destid, rbase, size, | |
756 | rflags, local); | |
757 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
758 | ||
759 | return rc; | |
760 | } | |
761 | EXPORT_SYMBOL_GPL(rio_map_outb_region); | |
762 | ||
763 | /** | |
764 | * rio_unmap_inb_region -- Unmap the inbound memory region | |
765 | * @mport: Master port | |
766 | * @destid: destination id mapping points to | |
767 | * @rstart: RIO base address window translates to | |
768 | */ | |
769 | void rio_unmap_outb_region(struct rio_mport *mport, u16 destid, u64 rstart) | |
770 | { | |
771 | unsigned long flags; | |
772 | ||
773 | if (!mport->ops->unmap_outb) | |
774 | return; | |
775 | ||
776 | spin_lock_irqsave(&rio_mmap_lock, flags); | |
777 | mport->ops->unmap_outb(mport, destid, rstart); | |
778 | spin_unlock_irqrestore(&rio_mmap_lock, flags); | |
779 | } | |
780 | EXPORT_SYMBOL_GPL(rio_unmap_outb_region); | |
781 | ||
e5cabeb3 AB |
782 | /** |
783 | * rio_mport_get_physefb - Helper function that returns register offset | |
784 | * for Physical Layer Extended Features Block. | |
97ef6f74 RD |
785 | * @port: Master port to issue transaction |
786 | * @local: Indicate a local master port or remote device access | |
787 | * @destid: Destination ID of the device | |
788 | * @hopcount: Number of switch hops to the device | |
e5cabeb3 AB |
789 | */ |
790 | u32 | |
791 | rio_mport_get_physefb(struct rio_mport *port, int local, | |
792 | u16 destid, u8 hopcount) | |
793 | { | |
794 | u32 ext_ftr_ptr; | |
795 | u32 ftr_header; | |
796 | ||
797 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, hopcount, 0); | |
798 | ||
799 | while (ext_ftr_ptr) { | |
800 | if (local) | |
801 | rio_local_read_config_32(port, ext_ftr_ptr, | |
802 | &ftr_header); | |
803 | else | |
804 | rio_mport_read_config_32(port, destid, hopcount, | |
805 | ext_ftr_ptr, &ftr_header); | |
806 | ||
807 | ftr_header = RIO_GET_BLOCK_ID(ftr_header); | |
808 | switch (ftr_header) { | |
809 | ||
810 | case RIO_EFB_SER_EP_ID_V13P: | |
811 | case RIO_EFB_SER_EP_REC_ID_V13P: | |
812 | case RIO_EFB_SER_EP_FREE_ID_V13P: | |
813 | case RIO_EFB_SER_EP_ID: | |
814 | case RIO_EFB_SER_EP_REC_ID: | |
815 | case RIO_EFB_SER_EP_FREE_ID: | |
816 | case RIO_EFB_SER_EP_FREC_ID: | |
817 | ||
818 | return ext_ftr_ptr; | |
819 | ||
820 | default: | |
821 | break; | |
822 | } | |
823 | ||
824 | ext_ftr_ptr = rio_mport_get_efb(port, local, destid, | |
825 | hopcount, ext_ftr_ptr); | |
826 | } | |
827 | ||
828 | return ext_ftr_ptr; | |
829 | } | |
a11650e1 | 830 | EXPORT_SYMBOL_GPL(rio_mport_get_physefb); |
e5cabeb3 AB |
831 | |
832 | /** | |
833 | * rio_get_comptag - Begin or continue searching for a RIO device by component tag | |
97ef6f74 | 834 | * @comp_tag: RIO component tag to match |
e5cabeb3 AB |
835 | * @from: Previous RIO device found in search, or %NULL for new search |
836 | * | |
837 | * Iterates through the list of known RIO devices. If a RIO device is | |
838 | * found with a matching @comp_tag, a pointer to its device | |
839 | * structure is returned. Otherwise, %NULL is returned. A new search | |
840 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
841 | * @from is not %NULL, searches continue from next device on the global | |
842 | * list. | |
843 | */ | |
af84ca38 | 844 | struct rio_dev *rio_get_comptag(u32 comp_tag, struct rio_dev *from) |
e5cabeb3 AB |
845 | { |
846 | struct list_head *n; | |
847 | struct rio_dev *rdev; | |
848 | ||
e5cabeb3 AB |
849 | spin_lock(&rio_global_list_lock); |
850 | n = from ? from->global_list.next : rio_devices.next; | |
851 | ||
852 | while (n && (n != &rio_devices)) { | |
853 | rdev = rio_dev_g(n); | |
854 | if (rdev->comp_tag == comp_tag) | |
855 | goto exit; | |
856 | n = n->next; | |
857 | } | |
858 | rdev = NULL; | |
859 | exit: | |
860 | spin_unlock(&rio_global_list_lock); | |
861 | return rdev; | |
862 | } | |
a11650e1 | 863 | EXPORT_SYMBOL_GPL(rio_get_comptag); |
e5cabeb3 AB |
864 | |
865 | /** | |
866 | * rio_set_port_lockout - Sets/clears LOCKOUT bit (RIO EM 1.3) for a switch port. | |
867 | * @rdev: Pointer to RIO device control structure | |
868 | * @pnum: Switch port number to set LOCKOUT bit | |
869 | * @lock: Operation : set (=1) or clear (=0) | |
870 | */ | |
871 | int rio_set_port_lockout(struct rio_dev *rdev, u32 pnum, int lock) | |
872 | { | |
e5cabeb3 AB |
873 | u32 regval; |
874 | ||
a93192a5 | 875 | rio_read_config_32(rdev, |
e5cabeb3 AB |
876 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
877 | ®val); | |
878 | if (lock) | |
879 | regval |= RIO_PORT_N_CTL_LOCKOUT; | |
880 | else | |
881 | regval &= ~RIO_PORT_N_CTL_LOCKOUT; | |
882 | ||
a93192a5 | 883 | rio_write_config_32(rdev, |
e5cabeb3 AB |
884 | rdev->phys_efptr + RIO_PORT_N_CTL_CSR(pnum), |
885 | regval); | |
886 | return 0; | |
887 | } | |
a11650e1 AB |
888 | EXPORT_SYMBOL_GPL(rio_set_port_lockout); |
889 | ||
a11650e1 AB |
890 | /** |
891 | * rio_enable_rx_tx_port - enable input receiver and output transmitter of | |
892 | * given port | |
893 | * @port: Master port associated with the RIO network | |
894 | * @local: local=1 select local port otherwise a far device is reached | |
895 | * @destid: Destination ID of the device to check host bit | |
896 | * @hopcount: Number of hops to reach the target | |
897 | * @port_num: Port (-number on switch) to enable on a far end device | |
898 | * | |
899 | * Returns 0 or 1 from on General Control Command and Status Register | |
900 | * (EXT_PTR+0x3C) | |
901 | */ | |
902 | int rio_enable_rx_tx_port(struct rio_mport *port, | |
903 | int local, u16 destid, | |
904 | u8 hopcount, u8 port_num) | |
905 | { | |
906 | #ifdef CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS | |
907 | u32 regval; | |
908 | u32 ext_ftr_ptr; | |
909 | ||
910 | /* | |
911 | * enable rx input tx output port | |
912 | */ | |
913 | pr_debug("rio_enable_rx_tx_port(local = %d, destid = %d, hopcount = " | |
914 | "%d, port_num = %d)\n", local, destid, hopcount, port_num); | |
915 | ||
916 | ext_ftr_ptr = rio_mport_get_physefb(port, local, destid, hopcount); | |
917 | ||
918 | if (local) { | |
919 | rio_local_read_config_32(port, ext_ftr_ptr + | |
920 | RIO_PORT_N_CTL_CSR(0), | |
921 | ®val); | |
922 | } else { | |
923 | if (rio_mport_read_config_32(port, destid, hopcount, | |
924 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), ®val) < 0) | |
925 | return -EIO; | |
926 | } | |
927 | ||
928 | if (regval & RIO_PORT_N_CTL_P_TYP_SER) { | |
929 | /* serial */ | |
930 | regval = regval | RIO_PORT_N_CTL_EN_RX_SER | |
931 | | RIO_PORT_N_CTL_EN_TX_SER; | |
932 | } else { | |
933 | /* parallel */ | |
934 | regval = regval | RIO_PORT_N_CTL_EN_RX_PAR | |
935 | | RIO_PORT_N_CTL_EN_TX_PAR; | |
936 | } | |
937 | ||
938 | if (local) { | |
939 | rio_local_write_config_32(port, ext_ftr_ptr + | |
940 | RIO_PORT_N_CTL_CSR(0), regval); | |
941 | } else { | |
942 | if (rio_mport_write_config_32(port, destid, hopcount, | |
943 | ext_ftr_ptr + RIO_PORT_N_CTL_CSR(port_num), regval) < 0) | |
944 | return -EIO; | |
945 | } | |
946 | #endif | |
947 | return 0; | |
948 | } | |
949 | EXPORT_SYMBOL_GPL(rio_enable_rx_tx_port); | |
950 | ||
e5cabeb3 | 951 | |
6429cd49 AB |
952 | /** |
953 | * rio_chk_dev_route - Validate route to the specified device. | |
954 | * @rdev: RIO device failed to respond | |
955 | * @nrdev: Last active device on the route to rdev | |
956 | * @npnum: nrdev's port number on the route to rdev | |
957 | * | |
958 | * Follows a route to the specified RIO device to determine the last available | |
959 | * device (and corresponding RIO port) on the route. | |
960 | */ | |
961 | static int | |
962 | rio_chk_dev_route(struct rio_dev *rdev, struct rio_dev **nrdev, int *npnum) | |
963 | { | |
964 | u32 result; | |
a93192a5 | 965 | int p_port, rc = -EIO; |
6429cd49 AB |
966 | struct rio_dev *prev = NULL; |
967 | ||
968 | /* Find switch with failed RIO link */ | |
969 | while (rdev->prev && (rdev->prev->pef & RIO_PEF_SWITCH)) { | |
970 | if (!rio_read_config_32(rdev->prev, RIO_DEV_ID_CAR, &result)) { | |
971 | prev = rdev->prev; | |
972 | break; | |
973 | } | |
974 | rdev = rdev->prev; | |
975 | } | |
976 | ||
977 | if (prev == NULL) | |
978 | goto err_out; | |
979 | ||
a93192a5 | 980 | p_port = prev->rswitch->route_table[rdev->destid]; |
6429cd49 | 981 | |
af84ca38 | 982 | if (p_port != RIO_INVALID_ROUTE) { |
6429cd49 AB |
983 | pr_debug("RIO: link failed on [%s]-P%d\n", |
984 | rio_name(prev), p_port); | |
985 | *nrdev = prev; | |
986 | *npnum = p_port; | |
987 | rc = 0; | |
988 | } else | |
af84ca38 | 989 | pr_debug("RIO: failed to trace route to %s\n", rio_name(rdev)); |
6429cd49 AB |
990 | err_out: |
991 | return rc; | |
992 | } | |
993 | ||
994 | /** | |
995 | * rio_mport_chk_dev_access - Validate access to the specified device. | |
996 | * @mport: Master port to send transactions | |
997 | * @destid: Device destination ID in network | |
998 | * @hopcount: Number of hops into the network | |
999 | */ | |
e274e0ed | 1000 | int |
6429cd49 AB |
1001 | rio_mport_chk_dev_access(struct rio_mport *mport, u16 destid, u8 hopcount) |
1002 | { | |
1003 | int i = 0; | |
1004 | u32 tmp; | |
1005 | ||
1006 | while (rio_mport_read_config_32(mport, destid, hopcount, | |
1007 | RIO_DEV_ID_CAR, &tmp)) { | |
1008 | i++; | |
1009 | if (i == RIO_MAX_CHK_RETRY) | |
1010 | return -EIO; | |
1011 | mdelay(1); | |
1012 | } | |
1013 | ||
1014 | return 0; | |
1015 | } | |
a11650e1 | 1016 | EXPORT_SYMBOL_GPL(rio_mport_chk_dev_access); |
6429cd49 AB |
1017 | |
1018 | /** | |
1019 | * rio_chk_dev_access - Validate access to the specified device. | |
1020 | * @rdev: Pointer to RIO device control structure | |
1021 | */ | |
1022 | static int rio_chk_dev_access(struct rio_dev *rdev) | |
1023 | { | |
a93192a5 AB |
1024 | return rio_mport_chk_dev_access(rdev->net->hport, |
1025 | rdev->destid, rdev->hopcount); | |
6429cd49 AB |
1026 | } |
1027 | ||
dd5648c9 AB |
1028 | /** |
1029 | * rio_get_input_status - Sends a Link-Request/Input-Status control symbol and | |
1030 | * returns link-response (if requested). | |
1031 | * @rdev: RIO devive to issue Input-status command | |
1032 | * @pnum: Device port number to issue the command | |
1033 | * @lnkresp: Response from a link partner | |
1034 | */ | |
1035 | static int | |
1036 | rio_get_input_status(struct rio_dev *rdev, int pnum, u32 *lnkresp) | |
1037 | { | |
dd5648c9 AB |
1038 | u32 regval; |
1039 | int checkcount; | |
1040 | ||
1041 | if (lnkresp) { | |
1042 | /* Read from link maintenance response register | |
1043 | * to clear valid bit */ | |
a93192a5 | 1044 | rio_read_config_32(rdev, |
dd5648c9 AB |
1045 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
1046 | ®val); | |
1047 | udelay(50); | |
1048 | } | |
1049 | ||
1050 | /* Issue Input-status command */ | |
a93192a5 | 1051 | rio_write_config_32(rdev, |
dd5648c9 AB |
1052 | rdev->phys_efptr + RIO_PORT_N_MNT_REQ_CSR(pnum), |
1053 | RIO_MNT_REQ_CMD_IS); | |
1054 | ||
1055 | /* Exit if the response is not expected */ | |
1056 | if (lnkresp == NULL) | |
1057 | return 0; | |
1058 | ||
1059 | checkcount = 3; | |
1060 | while (checkcount--) { | |
1061 | udelay(50); | |
a93192a5 | 1062 | rio_read_config_32(rdev, |
dd5648c9 AB |
1063 | rdev->phys_efptr + RIO_PORT_N_MNT_RSP_CSR(pnum), |
1064 | ®val); | |
1065 | if (regval & RIO_PORT_N_MNT_RSP_RVAL) { | |
1066 | *lnkresp = regval; | |
1067 | return 0; | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | return -EIO; | |
1072 | } | |
1073 | ||
1074 | /** | |
1075 | * rio_clr_err_stopped - Clears port Error-stopped states. | |
1076 | * @rdev: Pointer to RIO device control structure | |
1077 | * @pnum: Switch port number to clear errors | |
1078 | * @err_status: port error status (if 0 reads register from device) | |
1079 | */ | |
1080 | static int rio_clr_err_stopped(struct rio_dev *rdev, u32 pnum, u32 err_status) | |
1081 | { | |
dd5648c9 AB |
1082 | struct rio_dev *nextdev = rdev->rswitch->nextdev[pnum]; |
1083 | u32 regval; | |
1084 | u32 far_ackid, far_linkstat, near_ackid; | |
1085 | ||
1086 | if (err_status == 0) | |
a93192a5 | 1087 | rio_read_config_32(rdev, |
dd5648c9 AB |
1088 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
1089 | &err_status); | |
1090 | ||
1091 | if (err_status & RIO_PORT_N_ERR_STS_PW_OUT_ES) { | |
1092 | pr_debug("RIO_EM: servicing Output Error-Stopped state\n"); | |
1093 | /* | |
1094 | * Send a Link-Request/Input-Status control symbol | |
1095 | */ | |
1096 | if (rio_get_input_status(rdev, pnum, ®val)) { | |
1097 | pr_debug("RIO_EM: Input-status response timeout\n"); | |
1098 | goto rd_err; | |
1099 | } | |
1100 | ||
1101 | pr_debug("RIO_EM: SP%d Input-status response=0x%08x\n", | |
1102 | pnum, regval); | |
1103 | far_ackid = (regval & RIO_PORT_N_MNT_RSP_ASTAT) >> 5; | |
1104 | far_linkstat = regval & RIO_PORT_N_MNT_RSP_LSTAT; | |
a93192a5 | 1105 | rio_read_config_32(rdev, |
dd5648c9 AB |
1106 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), |
1107 | ®val); | |
1108 | pr_debug("RIO_EM: SP%d_ACK_STS_CSR=0x%08x\n", pnum, regval); | |
1109 | near_ackid = (regval & RIO_PORT_N_ACK_INBOUND) >> 24; | |
1110 | pr_debug("RIO_EM: SP%d far_ackID=0x%02x far_linkstat=0x%02x" \ | |
1111 | " near_ackID=0x%02x\n", | |
1112 | pnum, far_ackid, far_linkstat, near_ackid); | |
1113 | ||
1114 | /* | |
1115 | * If required, synchronize ackIDs of near and | |
1116 | * far sides. | |
1117 | */ | |
1118 | if ((far_ackid != ((regval & RIO_PORT_N_ACK_OUTSTAND) >> 8)) || | |
1119 | (far_ackid != (regval & RIO_PORT_N_ACK_OUTBOUND))) { | |
1120 | /* Align near outstanding/outbound ackIDs with | |
1121 | * far inbound. | |
1122 | */ | |
a93192a5 AB |
1123 | rio_write_config_32(rdev, |
1124 | rdev->phys_efptr + RIO_PORT_N_ACK_STS_CSR(pnum), | |
dd5648c9 AB |
1125 | (near_ackid << 24) | |
1126 | (far_ackid << 8) | far_ackid); | |
1127 | /* Align far outstanding/outbound ackIDs with | |
1128 | * near inbound. | |
1129 | */ | |
1130 | far_ackid++; | |
1131 | if (nextdev) | |
1132 | rio_write_config_32(nextdev, | |
1133 | nextdev->phys_efptr + | |
1134 | RIO_PORT_N_ACK_STS_CSR(RIO_GET_PORT_NUM(nextdev->swpinfo)), | |
1135 | (far_ackid << 24) | | |
1136 | (near_ackid << 8) | near_ackid); | |
1137 | else | |
1138 | pr_debug("RIO_EM: Invalid nextdev pointer (NULL)\n"); | |
1139 | } | |
1140 | rd_err: | |
a93192a5 | 1141 | rio_read_config_32(rdev, |
dd5648c9 AB |
1142 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
1143 | &err_status); | |
1144 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
1145 | } | |
1146 | ||
1147 | if ((err_status & RIO_PORT_N_ERR_STS_PW_INP_ES) && nextdev) { | |
1148 | pr_debug("RIO_EM: servicing Input Error-Stopped state\n"); | |
1149 | rio_get_input_status(nextdev, | |
1150 | RIO_GET_PORT_NUM(nextdev->swpinfo), NULL); | |
1151 | udelay(50); | |
1152 | ||
a93192a5 | 1153 | rio_read_config_32(rdev, |
dd5648c9 AB |
1154 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(pnum), |
1155 | &err_status); | |
1156 | pr_debug("RIO_EM: SP%d_ERR_STS_CSR=0x%08x\n", pnum, err_status); | |
1157 | } | |
1158 | ||
1159 | return (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
1160 | RIO_PORT_N_ERR_STS_PW_INP_ES)) ? 1 : 0; | |
1161 | } | |
1162 | ||
e5cabeb3 | 1163 | /** |
9a0b0627 AB |
1164 | * rio_inb_pwrite_handler - inbound port-write message handler |
1165 | * @mport: mport device associated with port-write | |
e5cabeb3 AB |
1166 | * @pw_msg: pointer to inbound port-write message |
1167 | * | |
1168 | * Processes an inbound port-write message. Returns 0 if the request | |
1169 | * has been satisfied. | |
1170 | */ | |
9a0b0627 | 1171 | int rio_inb_pwrite_handler(struct rio_mport *mport, union rio_pw_msg *pw_msg) |
e5cabeb3 AB |
1172 | { |
1173 | struct rio_dev *rdev; | |
dd5648c9 | 1174 | u32 err_status, em_perrdet, em_ltlerrdet; |
e5cabeb3 | 1175 | int rc, portnum; |
9a0b0627 | 1176 | struct rio_pwrite *pwrite; |
e5cabeb3 AB |
1177 | |
1178 | #ifdef DEBUG_PW | |
1179 | { | |
9a0b0627 AB |
1180 | u32 i; |
1181 | ||
1182 | pr_debug("%s: PW to mport_%d:\n", __func__, mport->id); | |
1183 | for (i = 0; i < RIO_PW_MSG_SIZE / sizeof(u32); i = i + 4) { | |
dd5648c9 | 1184 | pr_debug("0x%02x: %08x %08x %08x %08x\n", |
9a0b0627 AB |
1185 | i * 4, pw_msg->raw[i], pw_msg->raw[i + 1], |
1186 | pw_msg->raw[i + 2], pw_msg->raw[i + 3]); | |
1187 | } | |
e5cabeb3 AB |
1188 | } |
1189 | #endif | |
1190 | ||
9a0b0627 AB |
1191 | rdev = rio_get_comptag((pw_msg->em.comptag & RIO_CTAG_UDEVID), NULL); |
1192 | if (rdev) { | |
1193 | pr_debug("RIO: Port-Write message from %s\n", rio_name(rdev)); | |
1194 | } else { | |
1195 | pr_debug("RIO: %s No matching device for CTag 0x%08x\n", | |
1196 | __func__, pw_msg->em.comptag); | |
1197 | } | |
1198 | ||
1199 | /* Call a device-specific handler (if it is registered for the device). | |
1200 | * This may be the service for endpoints that send device-specific | |
1201 | * port-write messages. End-point messages expected to be handled | |
1202 | * completely by EP specific device driver. | |
e5cabeb3 AB |
1203 | * For switches rc==0 signals that no standard processing required. |
1204 | */ | |
9a0b0627 | 1205 | if (rdev && rdev->pwcback) { |
e5cabeb3 AB |
1206 | rc = rdev->pwcback(rdev, pw_msg, 0); |
1207 | if (rc == 0) | |
1208 | return 0; | |
1209 | } | |
1210 | ||
9a0b0627 AB |
1211 | mutex_lock(&mport->lock); |
1212 | list_for_each_entry(pwrite, &mport->pwrites, node) | |
1213 | pwrite->pwcback(mport, pwrite->context, pw_msg, 0); | |
1214 | mutex_unlock(&mport->lock); | |
1215 | ||
1216 | if (!rdev) | |
1217 | return 0; | |
1218 | ||
1219 | /* | |
1220 | * FIXME: The code below stays as it was before for now until we decide | |
1221 | * how to do default PW handling in combination with per-mport callbacks | |
1222 | */ | |
1223 | ||
6429cd49 AB |
1224 | portnum = pw_msg->em.is_port & 0xFF; |
1225 | ||
1226 | /* Check if device and route to it are functional: | |
1227 | * Sometimes devices may send PW message(s) just before being | |
1228 | * powered down (or link being lost). | |
1229 | */ | |
1230 | if (rio_chk_dev_access(rdev)) { | |
1231 | pr_debug("RIO: device access failed - get link partner\n"); | |
1232 | /* Scan route to the device and identify failed link. | |
1233 | * This will replace device and port reported in PW message. | |
1234 | * PW message should not be used after this point. | |
1235 | */ | |
1236 | if (rio_chk_dev_route(rdev, &rdev, &portnum)) { | |
1237 | pr_err("RIO: Route trace for %s failed\n", | |
1238 | rio_name(rdev)); | |
1239 | return -EIO; | |
1240 | } | |
1241 | pw_msg = NULL; | |
1242 | } | |
1243 | ||
e5cabeb3 AB |
1244 | /* For End-point devices processing stops here */ |
1245 | if (!(rdev->pef & RIO_PEF_SWITCH)) | |
1246 | return 0; | |
1247 | ||
1248 | if (rdev->phys_efptr == 0) { | |
1249 | pr_err("RIO_PW: Bad switch initialization for %s\n", | |
1250 | rio_name(rdev)); | |
1251 | return 0; | |
1252 | } | |
1253 | ||
e5cabeb3 AB |
1254 | /* |
1255 | * Process the port-write notification from switch | |
1256 | */ | |
2ec3ba69 AB |
1257 | if (rdev->rswitch->ops && rdev->rswitch->ops->em_handle) |
1258 | rdev->rswitch->ops->em_handle(rdev, portnum); | |
e5cabeb3 | 1259 | |
a93192a5 | 1260 | rio_read_config_32(rdev, |
e5cabeb3 AB |
1261 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
1262 | &err_status); | |
1263 | pr_debug("RIO_PW: SP%d_ERR_STS_CSR=0x%08x\n", portnum, err_status); | |
1264 | ||
dd5648c9 | 1265 | if (err_status & RIO_PORT_N_ERR_STS_PORT_OK) { |
e5cabeb3 | 1266 | |
dd5648c9 AB |
1267 | if (!(rdev->rswitch->port_ok & (1 << portnum))) { |
1268 | rdev->rswitch->port_ok |= (1 << portnum); | |
1269 | rio_set_port_lockout(rdev, portnum, 0); | |
1270 | /* Schedule Insertion Service */ | |
1271 | pr_debug("RIO_PW: Device Insertion on [%s]-P%d\n", | |
1272 | rio_name(rdev), portnum); | |
1273 | } | |
e5cabeb3 | 1274 | |
dd5648c9 AB |
1275 | /* Clear error-stopped states (if reported). |
1276 | * Depending on the link partner state, two attempts | |
1277 | * may be needed for successful recovery. | |
1278 | */ | |
1279 | if (err_status & (RIO_PORT_N_ERR_STS_PW_OUT_ES | | |
1280 | RIO_PORT_N_ERR_STS_PW_INP_ES)) { | |
1281 | if (rio_clr_err_stopped(rdev, portnum, err_status)) | |
1282 | rio_clr_err_stopped(rdev, portnum, 0); | |
1283 | } | |
1284 | } else { /* if (err_status & RIO_PORT_N_ERR_STS_PORT_UNINIT) */ | |
e5cabeb3 | 1285 | |
dd5648c9 | 1286 | if (rdev->rswitch->port_ok & (1 << portnum)) { |
e5cabeb3 AB |
1287 | rdev->rswitch->port_ok &= ~(1 << portnum); |
1288 | rio_set_port_lockout(rdev, portnum, 1); | |
1289 | ||
a93192a5 | 1290 | rio_write_config_32(rdev, |
e5cabeb3 AB |
1291 | rdev->phys_efptr + |
1292 | RIO_PORT_N_ACK_STS_CSR(portnum), | |
1293 | RIO_PORT_N_ACK_CLEAR); | |
1294 | ||
1295 | /* Schedule Extraction Service */ | |
1296 | pr_debug("RIO_PW: Device Extraction on [%s]-P%d\n", | |
1297 | rio_name(rdev), portnum); | |
1298 | } | |
dd5648c9 | 1299 | } |
e5cabeb3 | 1300 | |
a93192a5 | 1301 | rio_read_config_32(rdev, |
dd5648c9 AB |
1302 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), &em_perrdet); |
1303 | if (em_perrdet) { | |
1304 | pr_debug("RIO_PW: RIO_EM_P%d_ERR_DETECT=0x%08x\n", | |
1305 | portnum, em_perrdet); | |
1306 | /* Clear EM Port N Error Detect CSR */ | |
a93192a5 | 1307 | rio_write_config_32(rdev, |
dd5648c9 AB |
1308 | rdev->em_efptr + RIO_EM_PN_ERR_DETECT(portnum), 0); |
1309 | } | |
1310 | ||
a93192a5 | 1311 | rio_read_config_32(rdev, |
dd5648c9 AB |
1312 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, &em_ltlerrdet); |
1313 | if (em_ltlerrdet) { | |
1314 | pr_debug("RIO_PW: RIO_EM_LTL_ERR_DETECT=0x%08x\n", | |
1315 | em_ltlerrdet); | |
1316 | /* Clear EM L/T Layer Error Detect CSR */ | |
a93192a5 | 1317 | rio_write_config_32(rdev, |
dd5648c9 | 1318 | rdev->em_efptr + RIO_EM_LTL_ERR_DETECT, 0); |
e5cabeb3 AB |
1319 | } |
1320 | ||
388c45cc | 1321 | /* Clear remaining error bits and Port-Write Pending bit */ |
a93192a5 | 1322 | rio_write_config_32(rdev, |
dd5648c9 | 1323 | rdev->phys_efptr + RIO_PORT_N_ERR_STS_CSR(portnum), |
388c45cc | 1324 | err_status); |
e5cabeb3 AB |
1325 | |
1326 | return 0; | |
1327 | } | |
1328 | EXPORT_SYMBOL_GPL(rio_inb_pwrite_handler); | |
1329 | ||
1330 | /** | |
1331 | * rio_mport_get_efb - get pointer to next extended features block | |
1332 | * @port: Master port to issue transaction | |
1333 | * @local: Indicate a local master port or remote device access | |
1334 | * @destid: Destination ID of the device | |
1335 | * @hopcount: Number of switch hops to the device | |
1336 | * @from: Offset of current Extended Feature block header (if 0 starts | |
1337 | * from ExtFeaturePtr) | |
1338 | */ | |
1339 | u32 | |
1340 | rio_mport_get_efb(struct rio_mport *port, int local, u16 destid, | |
1341 | u8 hopcount, u32 from) | |
1342 | { | |
1343 | u32 reg_val; | |
1344 | ||
1345 | if (from == 0) { | |
1346 | if (local) | |
1347 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, | |
1348 | ®_val); | |
1349 | else | |
1350 | rio_mport_read_config_32(port, destid, hopcount, | |
1351 | RIO_ASM_INFO_CAR, ®_val); | |
1352 | return reg_val & RIO_EXT_FTR_PTR_MASK; | |
1353 | } else { | |
1354 | if (local) | |
1355 | rio_local_read_config_32(port, from, ®_val); | |
1356 | else | |
1357 | rio_mport_read_config_32(port, destid, hopcount, | |
1358 | from, ®_val); | |
1359 | return RIO_GET_BLOCK_ID(reg_val); | |
1360 | } | |
1361 | } | |
a11650e1 | 1362 | EXPORT_SYMBOL_GPL(rio_mport_get_efb); |
e5cabeb3 | 1363 | |
394b701c MP |
1364 | /** |
1365 | * rio_mport_get_feature - query for devices' extended features | |
1366 | * @port: Master port to issue transaction | |
1367 | * @local: Indicate a local master port or remote device access | |
1368 | * @destid: Destination ID of the device | |
1369 | * @hopcount: Number of switch hops to the device | |
1370 | * @ftr: Extended feature code | |
1371 | * | |
1372 | * Tell if a device supports a given RapidIO capability. | |
1373 | * Returns the offset of the requested extended feature | |
1374 | * block within the device's RIO configuration space or | |
1375 | * 0 in case the device does not support it. Possible | |
1376 | * values for @ftr: | |
1377 | * | |
1378 | * %RIO_EFB_PAR_EP_ID LP/LVDS EP Devices | |
1379 | * | |
1380 | * %RIO_EFB_PAR_EP_REC_ID LP/LVDS EP Recovery Devices | |
1381 | * | |
1382 | * %RIO_EFB_PAR_EP_FREE_ID LP/LVDS EP Free Devices | |
1383 | * | |
1384 | * %RIO_EFB_SER_EP_ID LP/Serial EP Devices | |
1385 | * | |
1386 | * %RIO_EFB_SER_EP_REC_ID LP/Serial EP Recovery Devices | |
1387 | * | |
1388 | * %RIO_EFB_SER_EP_FREE_ID LP/Serial EP Free Devices | |
1389 | */ | |
1390 | u32 | |
1391 | rio_mport_get_feature(struct rio_mport * port, int local, u16 destid, | |
1392 | u8 hopcount, int ftr) | |
1393 | { | |
1394 | u32 asm_info, ext_ftr_ptr, ftr_header; | |
1395 | ||
1396 | if (local) | |
1397 | rio_local_read_config_32(port, RIO_ASM_INFO_CAR, &asm_info); | |
1398 | else | |
1399 | rio_mport_read_config_32(port, destid, hopcount, | |
1400 | RIO_ASM_INFO_CAR, &asm_info); | |
1401 | ||
1402 | ext_ftr_ptr = asm_info & RIO_EXT_FTR_PTR_MASK; | |
1403 | ||
1404 | while (ext_ftr_ptr) { | |
1405 | if (local) | |
1406 | rio_local_read_config_32(port, ext_ftr_ptr, | |
1407 | &ftr_header); | |
1408 | else | |
1409 | rio_mport_read_config_32(port, destid, hopcount, | |
1410 | ext_ftr_ptr, &ftr_header); | |
1411 | if (RIO_GET_BLOCK_ID(ftr_header) == ftr) | |
1412 | return ext_ftr_ptr; | |
1413 | if (!(ext_ftr_ptr = RIO_GET_BLOCK_PTR(ftr_header))) | |
1414 | break; | |
1415 | } | |
1416 | ||
1417 | return 0; | |
1418 | } | |
a11650e1 | 1419 | EXPORT_SYMBOL_GPL(rio_mport_get_feature); |
394b701c MP |
1420 | |
1421 | /** | |
1422 | * rio_get_asm - Begin or continue searching for a RIO device by vid/did/asm_vid/asm_did | |
1423 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1424 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1425 | * @asm_vid: RIO asm_vid to match or %RIO_ANY_ID to match all asm_vids | |
1426 | * @asm_did: RIO asm_did to match or %RIO_ANY_ID to match all asm_dids | |
1427 | * @from: Previous RIO device found in search, or %NULL for new search | |
1428 | * | |
1429 | * Iterates through the list of known RIO devices. If a RIO device is | |
1430 | * found with a matching @vid, @did, @asm_vid, @asm_did, the reference | |
1431 | * count to the device is incrememted and a pointer to its device | |
1432 | * structure is returned. Otherwise, %NULL is returned. A new search | |
1433 | * is initiated by passing %NULL to the @from argument. Otherwise, if | |
1434 | * @from is not %NULL, searches continue from next device on the global | |
1435 | * list. The reference count for @from is always decremented if it is | |
1436 | * not %NULL. | |
1437 | */ | |
1438 | struct rio_dev *rio_get_asm(u16 vid, u16 did, | |
1439 | u16 asm_vid, u16 asm_did, struct rio_dev *from) | |
1440 | { | |
1441 | struct list_head *n; | |
1442 | struct rio_dev *rdev; | |
1443 | ||
1444 | WARN_ON(in_interrupt()); | |
1445 | spin_lock(&rio_global_list_lock); | |
1446 | n = from ? from->global_list.next : rio_devices.next; | |
1447 | ||
1448 | while (n && (n != &rio_devices)) { | |
1449 | rdev = rio_dev_g(n); | |
1450 | if ((vid == RIO_ANY_ID || rdev->vid == vid) && | |
1451 | (did == RIO_ANY_ID || rdev->did == did) && | |
1452 | (asm_vid == RIO_ANY_ID || rdev->asm_vid == asm_vid) && | |
1453 | (asm_did == RIO_ANY_ID || rdev->asm_did == asm_did)) | |
1454 | goto exit; | |
1455 | n = n->next; | |
1456 | } | |
1457 | rdev = NULL; | |
1458 | exit: | |
1459 | rio_dev_put(from); | |
1460 | rdev = rio_dev_get(rdev); | |
1461 | spin_unlock(&rio_global_list_lock); | |
1462 | return rdev; | |
1463 | } | |
1464 | ||
1465 | /** | |
1466 | * rio_get_device - Begin or continue searching for a RIO device by vid/did | |
1467 | * @vid: RIO vid to match or %RIO_ANY_ID to match all vids | |
1468 | * @did: RIO did to match or %RIO_ANY_ID to match all dids | |
1469 | * @from: Previous RIO device found in search, or %NULL for new search | |
1470 | * | |
1471 | * Iterates through the list of known RIO devices. If a RIO device is | |
1472 | * found with a matching @vid and @did, the reference count to the | |
1473 | * device is incrememted and a pointer to its device structure is returned. | |
1474 | * Otherwise, %NULL is returned. A new search is initiated by passing %NULL | |
1475 | * to the @from argument. Otherwise, if @from is not %NULL, searches | |
1476 | * continue from next device on the global list. The reference count for | |
1477 | * @from is always decremented if it is not %NULL. | |
1478 | */ | |
1479 | struct rio_dev *rio_get_device(u16 vid, u16 did, struct rio_dev *from) | |
1480 | { | |
1481 | return rio_get_asm(vid, did, RIO_ANY_ID, RIO_ANY_ID, from); | |
1482 | } | |
1483 | ||
07590ff0 AB |
1484 | /** |
1485 | * rio_std_route_add_entry - Add switch route table entry using standard | |
1486 | * registers defined in RIO specification rev.1.3 | |
1487 | * @mport: Master port to issue transaction | |
1488 | * @destid: Destination ID of the device | |
1489 | * @hopcount: Number of switch hops to the device | |
1490 | * @table: routing table ID (global or port-specific) | |
1491 | * @route_destid: destID entry in the RT | |
1492 | * @route_port: destination port for specified destID | |
1493 | */ | |
2ec3ba69 AB |
1494 | static int |
1495 | rio_std_route_add_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1496 | u16 table, u16 route_destid, u8 route_port) | |
07590ff0 AB |
1497 | { |
1498 | if (table == RIO_GLOBAL_TABLE) { | |
1499 | rio_mport_write_config_32(mport, destid, hopcount, | |
1500 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1501 | (u32)route_destid); | |
1502 | rio_mport_write_config_32(mport, destid, hopcount, | |
1503 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1504 | (u32)route_port); | |
1505 | } | |
e5cabeb3 | 1506 | |
07590ff0 AB |
1507 | udelay(10); |
1508 | return 0; | |
1509 | } | |
1510 | ||
1511 | /** | |
1512 | * rio_std_route_get_entry - Read switch route table entry (port number) | |
638c5945 | 1513 | * associated with specified destID using standard registers defined in RIO |
07590ff0 AB |
1514 | * specification rev.1.3 |
1515 | * @mport: Master port to issue transaction | |
1516 | * @destid: Destination ID of the device | |
1517 | * @hopcount: Number of switch hops to the device | |
1518 | * @table: routing table ID (global or port-specific) | |
1519 | * @route_destid: destID entry in the RT | |
1520 | * @route_port: returned destination port for specified destID | |
1521 | */ | |
2ec3ba69 AB |
1522 | static int |
1523 | rio_std_route_get_entry(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1524 | u16 table, u16 route_destid, u8 *route_port) | |
07590ff0 AB |
1525 | { |
1526 | u32 result; | |
1527 | ||
1528 | if (table == RIO_GLOBAL_TABLE) { | |
1529 | rio_mport_write_config_32(mport, destid, hopcount, | |
1530 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, route_destid); | |
1531 | rio_mport_read_config_32(mport, destid, hopcount, | |
1532 | RIO_STD_RTE_CONF_PORT_SEL_CSR, &result); | |
1533 | ||
1534 | *route_port = (u8)result; | |
1535 | } | |
1536 | ||
1537 | return 0; | |
1538 | } | |
1539 | ||
1540 | /** | |
1541 | * rio_std_route_clr_table - Clear swotch route table using standard registers | |
1542 | * defined in RIO specification rev.1.3. | |
1543 | * @mport: Master port to issue transaction | |
07590ff0 AB |
1544 | * @destid: Destination ID of the device |
1545 | * @hopcount: Number of switch hops to the device | |
1546 | * @table: routing table ID (global or port-specific) | |
1547 | */ | |
2ec3ba69 AB |
1548 | static int |
1549 | rio_std_route_clr_table(struct rio_mport *mport, u16 destid, u8 hopcount, | |
1550 | u16 table) | |
07590ff0 AB |
1551 | { |
1552 | u32 max_destid = 0xff; | |
1553 | u32 i, pef, id_inc = 1, ext_cfg = 0; | |
1554 | u32 port_sel = RIO_INVALID_ROUTE; | |
1555 | ||
1556 | if (table == RIO_GLOBAL_TABLE) { | |
1557 | rio_mport_read_config_32(mport, destid, hopcount, | |
1558 | RIO_PEF_CAR, &pef); | |
1559 | ||
1560 | if (mport->sys_size) { | |
1561 | rio_mport_read_config_32(mport, destid, hopcount, | |
1562 | RIO_SWITCH_RT_LIMIT, | |
1563 | &max_destid); | |
1564 | max_destid &= RIO_RT_MAX_DESTID; | |
1565 | } | |
1566 | ||
1567 | if (pef & RIO_PEF_EXT_RT) { | |
1568 | ext_cfg = 0x80000000; | |
1569 | id_inc = 4; | |
1570 | port_sel = (RIO_INVALID_ROUTE << 24) | | |
1571 | (RIO_INVALID_ROUTE << 16) | | |
1572 | (RIO_INVALID_ROUTE << 8) | | |
1573 | RIO_INVALID_ROUTE; | |
1574 | } | |
1575 | ||
1576 | for (i = 0; i <= max_destid;) { | |
1577 | rio_mport_write_config_32(mport, destid, hopcount, | |
1578 | RIO_STD_RTE_CONF_DESTID_SEL_CSR, | |
1579 | ext_cfg | i); | |
1580 | rio_mport_write_config_32(mport, destid, hopcount, | |
1581 | RIO_STD_RTE_CONF_PORT_SEL_CSR, | |
1582 | port_sel); | |
1583 | i += id_inc; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | udelay(10); | |
1588 | return 0; | |
1589 | } | |
1590 | ||
2ec3ba69 AB |
1591 | /** |
1592 | * rio_lock_device - Acquires host device lock for specified device | |
1593 | * @port: Master port to send transaction | |
1594 | * @destid: Destination ID for device/switch | |
1595 | * @hopcount: Hopcount to reach switch | |
1596 | * @wait_ms: Max wait time in msec (0 = no timeout) | |
1597 | * | |
1598 | * Attepts to acquire host device lock for specified device | |
1599 | * Returns 0 if device lock acquired or EINVAL if timeout expires. | |
1600 | */ | |
1601 | int rio_lock_device(struct rio_mport *port, u16 destid, | |
1602 | u8 hopcount, int wait_ms) | |
1603 | { | |
1604 | u32 result; | |
1605 | int tcnt = 0; | |
1606 | ||
1607 | /* Attempt to acquire device lock */ | |
1608 | rio_mport_write_config_32(port, destid, hopcount, | |
1609 | RIO_HOST_DID_LOCK_CSR, port->host_deviceid); | |
1610 | rio_mport_read_config_32(port, destid, hopcount, | |
1611 | RIO_HOST_DID_LOCK_CSR, &result); | |
1612 | ||
1613 | while (result != port->host_deviceid) { | |
1614 | if (wait_ms != 0 && tcnt == wait_ms) { | |
1615 | pr_debug("RIO: timeout when locking device %x:%x\n", | |
1616 | destid, hopcount); | |
1617 | return -EINVAL; | |
1618 | } | |
1619 | ||
1620 | /* Delay a bit */ | |
1621 | mdelay(1); | |
1622 | tcnt++; | |
1623 | /* Try to acquire device lock again */ | |
1624 | rio_mport_write_config_32(port, destid, | |
1625 | hopcount, | |
1626 | RIO_HOST_DID_LOCK_CSR, | |
1627 | port->host_deviceid); | |
1628 | rio_mport_read_config_32(port, destid, | |
1629 | hopcount, | |
1630 | RIO_HOST_DID_LOCK_CSR, &result); | |
1631 | } | |
1632 | ||
1633 | return 0; | |
1634 | } | |
1635 | EXPORT_SYMBOL_GPL(rio_lock_device); | |
1636 | ||
1637 | /** | |
1638 | * rio_unlock_device - Releases host device lock for specified device | |
1639 | * @port: Master port to send transaction | |
1640 | * @destid: Destination ID for device/switch | |
1641 | * @hopcount: Hopcount to reach switch | |
1642 | * | |
1643 | * Returns 0 if device lock released or EINVAL if fails. | |
1644 | */ | |
1645 | int rio_unlock_device(struct rio_mport *port, u16 destid, u8 hopcount) | |
1646 | { | |
1647 | u32 result; | |
1648 | ||
1649 | /* Release device lock */ | |
1650 | rio_mport_write_config_32(port, destid, | |
1651 | hopcount, | |
1652 | RIO_HOST_DID_LOCK_CSR, | |
1653 | port->host_deviceid); | |
1654 | rio_mport_read_config_32(port, destid, hopcount, | |
1655 | RIO_HOST_DID_LOCK_CSR, &result); | |
1656 | if ((result & 0xffff) != 0xffff) { | |
1657 | pr_debug("RIO: badness when releasing device lock %x:%x\n", | |
1658 | destid, hopcount); | |
1659 | return -EINVAL; | |
1660 | } | |
1661 | ||
1662 | return 0; | |
1663 | } | |
1664 | EXPORT_SYMBOL_GPL(rio_unlock_device); | |
1665 | ||
1666 | /** | |
1667 | * rio_route_add_entry- Add a route entry to a switch routing table | |
1668 | * @rdev: RIO device | |
1669 | * @table: Routing table ID | |
1670 | * @route_destid: Destination ID to be routed | |
1671 | * @route_port: Port number to be routed | |
1672 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1673 | * | |
1674 | * If available calls the switch specific add_entry() method to add a route | |
1675 | * entry into a switch routing table. Otherwise uses standard RT update method | |
1676 | * as defined by RapidIO specification. A specific routing table can be selected | |
1677 | * using the @table argument if a switch has per port routing tables or | |
1678 | * the standard (or global) table may be used by passing | |
1679 | * %RIO_GLOBAL_TABLE in @table. | |
1680 | * | |
1681 | * Returns %0 on success or %-EINVAL on failure. | |
1682 | */ | |
1683 | int rio_route_add_entry(struct rio_dev *rdev, | |
1684 | u16 table, u16 route_destid, u8 route_port, int lock) | |
1685 | { | |
1686 | int rc = -EINVAL; | |
1687 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1688 | ||
1689 | if (lock) { | |
1690 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1691 | rdev->hopcount, 1000); | |
1692 | if (rc) | |
1693 | return rc; | |
1694 | } | |
1695 | ||
1696 | spin_lock(&rdev->rswitch->lock); | |
1697 | ||
1698 | if (ops == NULL || ops->add_entry == NULL) { | |
1699 | rc = rio_std_route_add_entry(rdev->net->hport, rdev->destid, | |
1700 | rdev->hopcount, table, | |
1701 | route_destid, route_port); | |
1702 | } else if (try_module_get(ops->owner)) { | |
1703 | rc = ops->add_entry(rdev->net->hport, rdev->destid, | |
1704 | rdev->hopcount, table, route_destid, | |
1705 | route_port); | |
1706 | module_put(ops->owner); | |
1707 | } | |
1708 | ||
1709 | spin_unlock(&rdev->rswitch->lock); | |
1710 | ||
1711 | if (lock) | |
1712 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1713 | rdev->hopcount); | |
1714 | ||
1715 | return rc; | |
1716 | } | |
1717 | EXPORT_SYMBOL_GPL(rio_route_add_entry); | |
1718 | ||
1719 | /** | |
1720 | * rio_route_get_entry- Read an entry from a switch routing table | |
1721 | * @rdev: RIO device | |
1722 | * @table: Routing table ID | |
1723 | * @route_destid: Destination ID to be routed | |
1724 | * @route_port: Pointer to read port number into | |
1725 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1726 | * | |
1727 | * If available calls the switch specific get_entry() method to fetch a route | |
1728 | * entry from a switch routing table. Otherwise uses standard RT read method | |
1729 | * as defined by RapidIO specification. A specific routing table can be selected | |
1730 | * using the @table argument if a switch has per port routing tables or | |
1731 | * the standard (or global) table may be used by passing | |
1732 | * %RIO_GLOBAL_TABLE in @table. | |
1733 | * | |
1734 | * Returns %0 on success or %-EINVAL on failure. | |
1735 | */ | |
1736 | int rio_route_get_entry(struct rio_dev *rdev, u16 table, | |
1737 | u16 route_destid, u8 *route_port, int lock) | |
1738 | { | |
1739 | int rc = -EINVAL; | |
1740 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1741 | ||
1742 | if (lock) { | |
1743 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1744 | rdev->hopcount, 1000); | |
1745 | if (rc) | |
1746 | return rc; | |
1747 | } | |
1748 | ||
1749 | spin_lock(&rdev->rswitch->lock); | |
1750 | ||
1751 | if (ops == NULL || ops->get_entry == NULL) { | |
1752 | rc = rio_std_route_get_entry(rdev->net->hport, rdev->destid, | |
1753 | rdev->hopcount, table, | |
1754 | route_destid, route_port); | |
1755 | } else if (try_module_get(ops->owner)) { | |
1756 | rc = ops->get_entry(rdev->net->hport, rdev->destid, | |
1757 | rdev->hopcount, table, route_destid, | |
1758 | route_port); | |
1759 | module_put(ops->owner); | |
1760 | } | |
1761 | ||
1762 | spin_unlock(&rdev->rswitch->lock); | |
1763 | ||
1764 | if (lock) | |
1765 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1766 | rdev->hopcount); | |
1767 | return rc; | |
1768 | } | |
1769 | EXPORT_SYMBOL_GPL(rio_route_get_entry); | |
1770 | ||
1771 | /** | |
1772 | * rio_route_clr_table - Clear a switch routing table | |
1773 | * @rdev: RIO device | |
1774 | * @table: Routing table ID | |
1775 | * @lock: apply a hardware lock on switch device flag (1=lock, 0=no_lock) | |
1776 | * | |
1777 | * If available calls the switch specific clr_table() method to clear a switch | |
1778 | * routing table. Otherwise uses standard RT write method as defined by RapidIO | |
1779 | * specification. A specific routing table can be selected using the @table | |
1780 | * argument if a switch has per port routing tables or the standard (or global) | |
1781 | * table may be used by passing %RIO_GLOBAL_TABLE in @table. | |
1782 | * | |
1783 | * Returns %0 on success or %-EINVAL on failure. | |
1784 | */ | |
1785 | int rio_route_clr_table(struct rio_dev *rdev, u16 table, int lock) | |
1786 | { | |
1787 | int rc = -EINVAL; | |
1788 | struct rio_switch_ops *ops = rdev->rswitch->ops; | |
1789 | ||
1790 | if (lock) { | |
1791 | rc = rio_lock_device(rdev->net->hport, rdev->destid, | |
1792 | rdev->hopcount, 1000); | |
1793 | if (rc) | |
1794 | return rc; | |
1795 | } | |
1796 | ||
1797 | spin_lock(&rdev->rswitch->lock); | |
1798 | ||
1799 | if (ops == NULL || ops->clr_table == NULL) { | |
1800 | rc = rio_std_route_clr_table(rdev->net->hport, rdev->destid, | |
1801 | rdev->hopcount, table); | |
1802 | } else if (try_module_get(ops->owner)) { | |
1803 | rc = ops->clr_table(rdev->net->hport, rdev->destid, | |
1804 | rdev->hopcount, table); | |
1805 | ||
1806 | module_put(ops->owner); | |
1807 | } | |
1808 | ||
1809 | spin_unlock(&rdev->rswitch->lock); | |
1810 | ||
1811 | if (lock) | |
1812 | rio_unlock_device(rdev->net->hport, rdev->destid, | |
1813 | rdev->hopcount); | |
1814 | ||
1815 | return rc; | |
1816 | } | |
1817 | EXPORT_SYMBOL_GPL(rio_route_clr_table); | |
1818 | ||
e42d98eb AB |
1819 | #ifdef CONFIG_RAPIDIO_DMA_ENGINE |
1820 | ||
1821 | static bool rio_chan_filter(struct dma_chan *chan, void *arg) | |
1822 | { | |
4aff1ce7 | 1823 | struct rio_mport *mport = arg; |
e42d98eb AB |
1824 | |
1825 | /* Check that DMA device belongs to the right MPORT */ | |
4aff1ce7 | 1826 | return mport == container_of(chan->device, struct rio_mport, dma); |
e42d98eb AB |
1827 | } |
1828 | ||
1829 | /** | |
4aff1ce7 AB |
1830 | * rio_request_mport_dma - request RapidIO capable DMA channel associated |
1831 | * with specified local RapidIO mport device. | |
1832 | * @mport: RIO mport to perform DMA data transfers | |
e42d98eb AB |
1833 | * |
1834 | * Returns pointer to allocated DMA channel or NULL if failed. | |
1835 | */ | |
4aff1ce7 | 1836 | struct dma_chan *rio_request_mport_dma(struct rio_mport *mport) |
e42d98eb AB |
1837 | { |
1838 | dma_cap_mask_t mask; | |
e42d98eb AB |
1839 | |
1840 | dma_cap_zero(mask); | |
1841 | dma_cap_set(DMA_SLAVE, mask); | |
4aff1ce7 AB |
1842 | return dma_request_channel(mask, rio_chan_filter, mport); |
1843 | } | |
1844 | EXPORT_SYMBOL_GPL(rio_request_mport_dma); | |
e42d98eb | 1845 | |
4aff1ce7 AB |
1846 | /** |
1847 | * rio_request_dma - request RapidIO capable DMA channel that supports | |
1848 | * specified target RapidIO device. | |
1849 | * @rdev: RIO device associated with DMA transfer | |
1850 | * | |
1851 | * Returns pointer to allocated DMA channel or NULL if failed. | |
1852 | */ | |
1853 | struct dma_chan *rio_request_dma(struct rio_dev *rdev) | |
1854 | { | |
1855 | return rio_request_mport_dma(rdev->net->hport); | |
e42d98eb AB |
1856 | } |
1857 | EXPORT_SYMBOL_GPL(rio_request_dma); | |
1858 | ||
1859 | /** | |
1860 | * rio_release_dma - release specified DMA channel | |
1861 | * @dchan: DMA channel to release | |
1862 | */ | |
1863 | void rio_release_dma(struct dma_chan *dchan) | |
1864 | { | |
1865 | dma_release_channel(dchan); | |
1866 | } | |
1867 | EXPORT_SYMBOL_GPL(rio_release_dma); | |
1868 | ||
1869 | /** | |
4aff1ce7 | 1870 | * rio_dma_prep_xfer - RapidIO specific wrapper |
e42d98eb | 1871 | * for device_prep_slave_sg callback defined by DMAENGINE. |
e42d98eb | 1872 | * @dchan: DMA channel to configure |
4aff1ce7 | 1873 | * @destid: target RapidIO device destination ID |
e42d98eb AB |
1874 | * @data: RIO specific data descriptor |
1875 | * @direction: DMA data transfer direction (TO or FROM the device) | |
1876 | * @flags: dmaengine defined flags | |
1877 | * | |
1878 | * Initializes RapidIO capable DMA channel for the specified data transfer. | |
1879 | * Uses DMA channel private extension to pass information related to remote | |
1880 | * target RIO device. | |
f8e3a68c AB |
1881 | * |
1882 | * Returns: pointer to DMA transaction descriptor if successful, | |
1883 | * error-valued pointer or NULL if failed. | |
e42d98eb | 1884 | */ |
4aff1ce7 AB |
1885 | struct dma_async_tx_descriptor *rio_dma_prep_xfer(struct dma_chan *dchan, |
1886 | u16 destid, struct rio_dma_data *data, | |
e42d98eb AB |
1887 | enum dma_transfer_direction direction, unsigned long flags) |
1888 | { | |
e42d98eb AB |
1889 | struct rio_dma_ext rio_ext; |
1890 | ||
1891 | if (dchan->device->device_prep_slave_sg == NULL) { | |
1892 | pr_err("%s: prep_rio_sg == NULL\n", __func__); | |
1893 | return NULL; | |
1894 | } | |
1895 | ||
4aff1ce7 | 1896 | rio_ext.destid = destid; |
e42d98eb AB |
1897 | rio_ext.rio_addr_u = data->rio_addr_u; |
1898 | rio_ext.rio_addr = data->rio_addr; | |
1899 | rio_ext.wr_type = data->wr_type; | |
1900 | ||
4aff1ce7 AB |
1901 | return dmaengine_prep_rio_sg(dchan, data->sg, data->sg_len, |
1902 | direction, flags, &rio_ext); | |
1903 | } | |
1904 | EXPORT_SYMBOL_GPL(rio_dma_prep_xfer); | |
e42d98eb | 1905 | |
4aff1ce7 AB |
1906 | /** |
1907 | * rio_dma_prep_slave_sg - RapidIO specific wrapper | |
1908 | * for device_prep_slave_sg callback defined by DMAENGINE. | |
1909 | * @rdev: RIO device control structure | |
1910 | * @dchan: DMA channel to configure | |
1911 | * @data: RIO specific data descriptor | |
1912 | * @direction: DMA data transfer direction (TO or FROM the device) | |
1913 | * @flags: dmaengine defined flags | |
1914 | * | |
1915 | * Initializes RapidIO capable DMA channel for the specified data transfer. | |
1916 | * Uses DMA channel private extension to pass information related to remote | |
1917 | * target RIO device. | |
f8e3a68c AB |
1918 | * |
1919 | * Returns: pointer to DMA transaction descriptor if successful, | |
1920 | * error-valued pointer or NULL if failed. | |
4aff1ce7 AB |
1921 | */ |
1922 | struct dma_async_tx_descriptor *rio_dma_prep_slave_sg(struct rio_dev *rdev, | |
1923 | struct dma_chan *dchan, struct rio_dma_data *data, | |
1924 | enum dma_transfer_direction direction, unsigned long flags) | |
1925 | { | |
1926 | return rio_dma_prep_xfer(dchan, rdev->destid, data, direction, flags); | |
e42d98eb AB |
1927 | } |
1928 | EXPORT_SYMBOL_GPL(rio_dma_prep_slave_sg); | |
1929 | ||
1930 | #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ | |
1931 | ||
bc8fcfea AB |
1932 | /** |
1933 | * rio_find_mport - find RIO mport by its ID | |
1934 | * @mport_id: number (ID) of mport device | |
1935 | * | |
1936 | * Given a RIO mport number, the desired mport is located | |
1937 | * in the global list of mports. If the mport is found, a pointer to its | |
1938 | * data structure is returned. If no mport is found, %NULL is returned. | |
1939 | */ | |
1940 | struct rio_mport *rio_find_mport(int mport_id) | |
1941 | { | |
1942 | struct rio_mport *port; | |
1943 | ||
1944 | mutex_lock(&rio_mport_list_lock); | |
1945 | list_for_each_entry(port, &rio_mports, node) { | |
1946 | if (port->id == mport_id) | |
1947 | goto found; | |
1948 | } | |
1949 | port = NULL; | |
1950 | found: | |
1951 | mutex_unlock(&rio_mport_list_lock); | |
1952 | ||
1953 | return port; | |
1954 | } | |
1955 | ||
a11650e1 AB |
1956 | /** |
1957 | * rio_register_scan - enumeration/discovery method registration interface | |
1958 | * @mport_id: mport device ID for which fabric scan routine has to be set | |
1959 | * (RIO_MPORT_ANY = set for all available mports) | |
9edbc30b AB |
1960 | * @scan_ops: enumeration/discovery operations structure |
1961 | * | |
1962 | * Registers enumeration/discovery operations with RapidIO subsystem and | |
1963 | * attaches it to the specified mport device (or all available mports | |
1964 | * if RIO_MPORT_ANY is specified). | |
a11650e1 | 1965 | * |
a11650e1 | 1966 | * Returns error if the mport already has an enumerator attached to it. |
9edbc30b | 1967 | * In case of RIO_MPORT_ANY skips mports with valid scan routines (no error). |
a11650e1 AB |
1968 | */ |
1969 | int rio_register_scan(int mport_id, struct rio_scan *scan_ops) | |
1970 | { | |
1971 | struct rio_mport *port; | |
9edbc30b AB |
1972 | struct rio_scan_node *scan; |
1973 | int rc = 0; | |
a11650e1 | 1974 | |
9edbc30b | 1975 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); |
a11650e1 | 1976 | |
9edbc30b AB |
1977 | if ((mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) || |
1978 | !scan_ops) | |
1979 | return -EINVAL; | |
a11650e1 | 1980 | |
9edbc30b AB |
1981 | mutex_lock(&rio_mport_list_lock); |
1982 | ||
1983 | /* | |
1984 | * Check if there is another enumerator already registered for | |
1985 | * the same mport ID (including RIO_MPORT_ANY). Multiple enumerators | |
1986 | * for the same mport ID are not supported. | |
1987 | */ | |
1988 | list_for_each_entry(scan, &rio_scans, node) { | |
1989 | if (scan->mport_id == mport_id) { | |
1990 | rc = -EBUSY; | |
1991 | goto err_out; | |
a11650e1 AB |
1992 | } |
1993 | } | |
9edbc30b AB |
1994 | |
1995 | /* | |
1996 | * Allocate and initialize new scan registration node. | |
1997 | */ | |
1998 | scan = kzalloc(sizeof(*scan), GFP_KERNEL); | |
1999 | if (!scan) { | |
2000 | rc = -ENOMEM; | |
2001 | goto err_out; | |
2002 | } | |
2003 | ||
2004 | scan->mport_id = mport_id; | |
2005 | scan->ops = scan_ops; | |
2006 | ||
2007 | /* | |
2008 | * Traverse the list of registered mports to attach this new scan. | |
2009 | * | |
2010 | * The new scan with matching mport ID overrides any previously attached | |
2011 | * scan assuming that old scan (if any) is the default one (based on the | |
2012 | * enumerator registration check above). | |
2013 | * If the new scan is the global one, it will be attached only to mports | |
2014 | * that do not have their own individual operations already attached. | |
2015 | */ | |
2016 | list_for_each_entry(port, &rio_mports, node) { | |
2017 | if (port->id == mport_id) { | |
2018 | port->nscan = scan_ops; | |
2019 | break; | |
2020 | } else if (mport_id == RIO_MPORT_ANY && !port->nscan) | |
2021 | port->nscan = scan_ops; | |
2022 | } | |
2023 | ||
2024 | list_add_tail(&scan->node, &rio_scans); | |
2025 | ||
2026 | err_out: | |
a11650e1 AB |
2027 | mutex_unlock(&rio_mport_list_lock); |
2028 | ||
2029 | return rc; | |
2030 | } | |
2031 | EXPORT_SYMBOL_GPL(rio_register_scan); | |
2032 | ||
2033 | /** | |
2034 | * rio_unregister_scan - removes enumeration/discovery method from mport | |
2035 | * @mport_id: mport device ID for which fabric scan routine has to be | |
9edbc30b AB |
2036 | * unregistered (RIO_MPORT_ANY = apply to all mports that use |
2037 | * the specified scan_ops) | |
2038 | * @scan_ops: enumeration/discovery operations structure | |
a11650e1 AB |
2039 | * |
2040 | * Removes enumeration or discovery method assigned to the specified mport | |
9edbc30b AB |
2041 | * device. If RIO_MPORT_ANY is specified, removes the specified operations from |
2042 | * all mports that have them attached. | |
a11650e1 | 2043 | */ |
9edbc30b | 2044 | int rio_unregister_scan(int mport_id, struct rio_scan *scan_ops) |
a11650e1 AB |
2045 | { |
2046 | struct rio_mport *port; | |
9edbc30b AB |
2047 | struct rio_scan_node *scan; |
2048 | ||
2049 | pr_debug("RIO: %s for mport_id=%d\n", __func__, mport_id); | |
2050 | ||
2051 | if (mport_id != RIO_MPORT_ANY && mport_id >= RIO_MAX_MPORTS) | |
2052 | return -EINVAL; | |
a11650e1 AB |
2053 | |
2054 | mutex_lock(&rio_mport_list_lock); | |
9edbc30b AB |
2055 | |
2056 | list_for_each_entry(port, &rio_mports, node) | |
2057 | if (port->id == mport_id || | |
2058 | (mport_id == RIO_MPORT_ANY && port->nscan == scan_ops)) | |
2059 | port->nscan = NULL; | |
2060 | ||
f93f3c4e | 2061 | list_for_each_entry(scan, &rio_scans, node) { |
9edbc30b AB |
2062 | if (scan->mport_id == mport_id) { |
2063 | list_del(&scan->node); | |
2064 | kfree(scan); | |
f93f3c4e | 2065 | break; |
a11650e1 | 2066 | } |
f93f3c4e | 2067 | } |
9edbc30b | 2068 | |
a11650e1 AB |
2069 | mutex_unlock(&rio_mport_list_lock); |
2070 | ||
2071 | return 0; | |
2072 | } | |
2073 | EXPORT_SYMBOL_GPL(rio_unregister_scan); | |
2074 | ||
9edbc30b AB |
2075 | /** |
2076 | * rio_mport_scan - execute enumeration/discovery on the specified mport | |
2077 | * @mport_id: number (ID) of mport device | |
2078 | */ | |
2079 | int rio_mport_scan(int mport_id) | |
2080 | { | |
2081 | struct rio_mport *port = NULL; | |
2082 | int rc; | |
2083 | ||
2084 | mutex_lock(&rio_mport_list_lock); | |
2085 | list_for_each_entry(port, &rio_mports, node) { | |
2086 | if (port->id == mport_id) | |
2087 | goto found; | |
2088 | } | |
2089 | mutex_unlock(&rio_mport_list_lock); | |
2090 | return -ENODEV; | |
2091 | found: | |
2092 | if (!port->nscan) { | |
2093 | mutex_unlock(&rio_mport_list_lock); | |
2094 | return -EINVAL; | |
2095 | } | |
2096 | ||
2097 | if (!try_module_get(port->nscan->owner)) { | |
2098 | mutex_unlock(&rio_mport_list_lock); | |
2099 | return -ENODEV; | |
2100 | } | |
2101 | ||
2102 | mutex_unlock(&rio_mport_list_lock); | |
2103 | ||
2104 | if (port->host_deviceid >= 0) | |
2105 | rc = port->nscan->enumerate(port, 0); | |
2106 | else | |
2107 | rc = port->nscan->discover(port, RIO_SCAN_ENUM_NO_WAIT); | |
2108 | ||
2109 | module_put(port->nscan->owner); | |
2110 | return rc; | |
2111 | } | |
2112 | ||
394b701c MP |
2113 | static void rio_fixup_device(struct rio_dev *dev) |
2114 | { | |
2115 | } | |
2116 | ||
305c891e | 2117 | static int rio_init(void) |
394b701c MP |
2118 | { |
2119 | struct rio_dev *dev = NULL; | |
2120 | ||
2121 | while ((dev = rio_get_device(RIO_ANY_ID, RIO_ANY_ID, dev)) != NULL) { | |
2122 | rio_fixup_device(dev); | |
2123 | } | |
2124 | return 0; | |
2125 | } | |
2126 | ||
005842ef AB |
2127 | static struct workqueue_struct *rio_wq; |
2128 | ||
2129 | struct rio_disc_work { | |
2130 | struct work_struct work; | |
2131 | struct rio_mport *mport; | |
2132 | }; | |
2133 | ||
305c891e | 2134 | static void disc_work_handler(struct work_struct *_work) |
005842ef AB |
2135 | { |
2136 | struct rio_disc_work *work; | |
2137 | ||
2138 | work = container_of(_work, struct rio_disc_work, work); | |
2139 | pr_debug("RIO: discovery work for mport %d %s\n", | |
2140 | work->mport->id, work->mport->name); | |
9edbc30b AB |
2141 | if (try_module_get(work->mport->nscan->owner)) { |
2142 | work->mport->nscan->discover(work->mport, 0); | |
2143 | module_put(work->mport->nscan->owner); | |
2144 | } | |
005842ef AB |
2145 | } |
2146 | ||
305c891e | 2147 | int rio_init_mports(void) |
394b701c | 2148 | { |
394b701c | 2149 | struct rio_mport *port; |
005842ef | 2150 | struct rio_disc_work *work; |
2574740d AB |
2151 | int n = 0; |
2152 | ||
2153 | if (!next_portid) | |
2154 | return -ENODEV; | |
394b701c | 2155 | |
2574740d AB |
2156 | /* |
2157 | * First, run enumerations and check if we need to perform discovery | |
2158 | * on any of the registered mports. | |
2159 | */ | |
a11650e1 | 2160 | mutex_lock(&rio_mport_list_lock); |
394b701c | 2161 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 | 2162 | if (port->host_deviceid >= 0) { |
9edbc30b | 2163 | if (port->nscan && try_module_get(port->nscan->owner)) { |
bc8fcfea | 2164 | port->nscan->enumerate(port, 0); |
9edbc30b AB |
2165 | module_put(port->nscan->owner); |
2166 | } | |
a11650e1 | 2167 | } else |
2574740d AB |
2168 | n++; |
2169 | } | |
a11650e1 | 2170 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
2171 | |
2172 | if (!n) | |
2173 | goto no_disc; | |
2174 | ||
2175 | /* | |
2176 | * If we have mports that require discovery schedule a discovery work | |
2177 | * for each of them. If the code below fails to allocate needed | |
2178 | * resources, exit without error to keep results of enumeration | |
2179 | * process (if any). | |
9edbc30b | 2180 | * TODO: Implement restart of discovery process for all or |
2574740d AB |
2181 | * individual discovering mports. |
2182 | */ | |
2183 | rio_wq = alloc_workqueue("riodisc", 0, 0); | |
2184 | if (!rio_wq) { | |
2185 | pr_err("RIO: unable allocate rio_wq\n"); | |
2186 | goto no_disc; | |
005842ef AB |
2187 | } |
2188 | ||
2574740d AB |
2189 | work = kcalloc(n, sizeof *work, GFP_KERNEL); |
2190 | if (!work) { | |
2191 | pr_err("RIO: no memory for work struct\n"); | |
005842ef | 2192 | destroy_workqueue(rio_wq); |
2574740d | 2193 | goto no_disc; |
394b701c MP |
2194 | } |
2195 | ||
2574740d | 2196 | n = 0; |
a11650e1 | 2197 | mutex_lock(&rio_mport_list_lock); |
2574740d | 2198 | list_for_each_entry(port, &rio_mports, node) { |
a11650e1 | 2199 | if (port->host_deviceid < 0 && port->nscan) { |
2574740d AB |
2200 | work[n].mport = port; |
2201 | INIT_WORK(&work[n].work, disc_work_handler); | |
2202 | queue_work(rio_wq, &work[n].work); | |
2203 | n++; | |
2204 | } | |
2205 | } | |
2206 | ||
2207 | flush_workqueue(rio_wq); | |
9edbc30b | 2208 | mutex_unlock(&rio_mport_list_lock); |
2574740d AB |
2209 | pr_debug("RIO: destroy discovery workqueue\n"); |
2210 | destroy_workqueue(rio_wq); | |
2211 | kfree(work); | |
2212 | ||
2213 | no_disc: | |
2f809985 AB |
2214 | rio_init(); |
2215 | ||
c1256ebe | 2216 | return 0; |
394b701c MP |
2217 | } |
2218 | ||
569fccb6 AB |
2219 | static int rio_get_hdid(int index) |
2220 | { | |
fdf90abc | 2221 | if (ids_num == 0 || ids_num <= index || index >= RIO_MAX_MPORTS) |
569fccb6 AB |
2222 | return -1; |
2223 | ||
fdf90abc | 2224 | return hdid[index]; |
569fccb6 AB |
2225 | } |
2226 | ||
b77a2030 | 2227 | int rio_mport_initialize(struct rio_mport *mport) |
394b701c | 2228 | { |
569fccb6 AB |
2229 | if (next_portid >= RIO_MAX_MPORTS) { |
2230 | pr_err("RIO: reached specified max number of mports\n"); | |
b77a2030 | 2231 | return -ENODEV; |
569fccb6 AB |
2232 | } |
2233 | ||
b77a2030 AB |
2234 | atomic_set(&mport->state, RIO_DEVICE_INITIALIZING); |
2235 | mport->id = next_portid++; | |
2236 | mport->host_deviceid = rio_get_hdid(mport->id); | |
2237 | mport->nscan = NULL; | |
a7b4c636 | 2238 | mutex_init(&mport->lock); |
b6cb95e8 | 2239 | mport->pwe_refcnt = 0; |
9a0b0627 | 2240 | INIT_LIST_HEAD(&mport->pwrites); |
9edbc30b | 2241 | |
b77a2030 AB |
2242 | return 0; |
2243 | } | |
2244 | EXPORT_SYMBOL_GPL(rio_mport_initialize); | |
2aaf308b | 2245 | |
b77a2030 AB |
2246 | int rio_register_mport(struct rio_mport *port) |
2247 | { | |
2248 | struct rio_scan_node *scan = NULL; | |
2249 | int res = 0; | |
2aaf308b | 2250 | |
a11650e1 | 2251 | mutex_lock(&rio_mport_list_lock); |
9edbc30b AB |
2252 | |
2253 | /* | |
2254 | * Check if there are any registered enumeration/discovery operations | |
2255 | * that have to be attached to the added mport. | |
2256 | */ | |
2257 | list_for_each_entry(scan, &rio_scans, node) { | |
2258 | if (port->id == scan->mport_id || | |
2259 | scan->mport_id == RIO_MPORT_ANY) { | |
2260 | port->nscan = scan->ops; | |
2261 | if (port->id == scan->mport_id) | |
2262 | break; | |
2263 | } | |
2264 | } | |
b77a2030 AB |
2265 | |
2266 | list_add_tail(&port->node, &rio_mports); | |
a11650e1 | 2267 | mutex_unlock(&rio_mport_list_lock); |
9edbc30b | 2268 | |
b77a2030 AB |
2269 | dev_set_name(&port->dev, "rapidio%d", port->id); |
2270 | port->dev.class = &rio_mport_class; | |
2271 | atomic_set(&port->state, RIO_DEVICE_RUNNING); | |
2272 | ||
2273 | res = device_register(&port->dev); | |
2274 | if (res) | |
2275 | dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n", | |
2276 | port->id, res); | |
2277 | else | |
2278 | dev_dbg(&port->dev, "RIO: registered mport%d\n", port->id); | |
2279 | ||
2280 | return res; | |
2281 | } | |
2282 | EXPORT_SYMBOL_GPL(rio_register_mport); | |
2283 | ||
2284 | static int rio_mport_cleanup_callback(struct device *dev, void *data) | |
2285 | { | |
2286 | struct rio_dev *rdev = to_rio_dev(dev); | |
2287 | ||
2288 | if (dev->bus == &rio_bus_type) | |
2289 | rio_del_device(rdev, RIO_DEVICE_SHUTDOWN); | |
2290 | return 0; | |
2291 | } | |
2292 | ||
2293 | static int rio_net_remove_children(struct rio_net *net) | |
2294 | { | |
2295 | /* | |
2296 | * Unregister all RapidIO devices residing on this net (this will | |
2297 | * invoke notification of registered subsystem interfaces as well). | |
2298 | */ | |
2299 | device_for_each_child(&net->dev, NULL, rio_mport_cleanup_callback); | |
2300 | return 0; | |
2301 | } | |
2302 | ||
2303 | int rio_unregister_mport(struct rio_mport *port) | |
2304 | { | |
9edbc30b | 2305 | pr_debug("RIO: %s %s id=%d\n", __func__, port->name, port->id); |
b77a2030 AB |
2306 | |
2307 | /* Transition mport to the SHUTDOWN state */ | |
2308 | if (atomic_cmpxchg(&port->state, | |
2309 | RIO_DEVICE_RUNNING, | |
2310 | RIO_DEVICE_SHUTDOWN) != RIO_DEVICE_RUNNING) { | |
2311 | pr_err("RIO: %s unexpected state transition for mport %s\n", | |
2312 | __func__, port->name); | |
2313 | } | |
2314 | ||
2315 | if (port->net && port->net->hport == port) { | |
2316 | rio_net_remove_children(port->net); | |
2317 | rio_free_net(port->net); | |
2318 | } | |
2319 | ||
2320 | /* | |
2321 | * Unregister all RapidIO devices attached to this mport (this will | |
2322 | * invoke notification of registered subsystem interfaces as well). | |
2323 | */ | |
2324 | mutex_lock(&rio_mport_list_lock); | |
2325 | list_del(&port->node); | |
2326 | mutex_unlock(&rio_mport_list_lock); | |
2327 | device_unregister(&port->dev); | |
2328 | ||
59f99965 | 2329 | return 0; |
394b701c | 2330 | } |
b77a2030 | 2331 | EXPORT_SYMBOL_GPL(rio_unregister_mport); |
394b701c MP |
2332 | |
2333 | EXPORT_SYMBOL_GPL(rio_local_get_device_id); | |
2334 | EXPORT_SYMBOL_GPL(rio_get_device); | |
2335 | EXPORT_SYMBOL_GPL(rio_get_asm); | |
2336 | EXPORT_SYMBOL_GPL(rio_request_inb_dbell); | |
2337 | EXPORT_SYMBOL_GPL(rio_release_inb_dbell); | |
2338 | EXPORT_SYMBOL_GPL(rio_request_outb_dbell); | |
2339 | EXPORT_SYMBOL_GPL(rio_release_outb_dbell); | |
2340 | EXPORT_SYMBOL_GPL(rio_request_inb_mbox); | |
2341 | EXPORT_SYMBOL_GPL(rio_release_inb_mbox); | |
2342 | EXPORT_SYMBOL_GPL(rio_request_outb_mbox); | |
2343 | EXPORT_SYMBOL_GPL(rio_release_outb_mbox); | |
a11650e1 | 2344 | EXPORT_SYMBOL_GPL(rio_init_mports); |